Thomas Gleixner | 2874c5f | 2019-05-27 08:55:01 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | /* |
| 3 | * NET An implementation of the SOCKET network access protocol. |
| 4 | * |
| 5 | * Version: @(#)socket.c 1.1.93 18/02/95 |
| 6 | * |
| 7 | * Authors: Orest Zborowski, <obz@Kodak.COM> |
Jesper Juhl | 02c30a8 | 2005-05-05 16:16:16 -0700 | [diff] [blame] | 8 | * Ross Biro |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
| 10 | * |
| 11 | * Fixes: |
| 12 | * Anonymous : NOTSOCK/BADF cleanup. Error fix in |
| 13 | * shutdown() |
| 14 | * Alan Cox : verify_area() fixes |
| 15 | * Alan Cox : Removed DDI |
| 16 | * Jonathan Kamens : SOCK_DGRAM reconnect bug |
| 17 | * Alan Cox : Moved a load of checks to the very |
| 18 | * top level. |
| 19 | * Alan Cox : Move address structures to/from user |
| 20 | * mode above the protocol layers. |
| 21 | * Rob Janssen : Allow 0 length sends. |
| 22 | * Alan Cox : Asynchronous I/O support (cribbed from the |
| 23 | * tty drivers). |
| 24 | * Niibe Yutaka : Asynchronous I/O for writes (4.4BSD style) |
| 25 | * Jeff Uphoff : Made max number of sockets command-line |
| 26 | * configurable. |
| 27 | * Matti Aarnio : Made the number of sockets dynamic, |
| 28 | * to be allocated when needed, and mr. |
| 29 | * Uphoff's max is used as max to be |
| 30 | * allowed to allocate. |
| 31 | * Linus : Argh. removed all the socket allocation |
| 32 | * altogether: it's in the inode now. |
| 33 | * Alan Cox : Made sock_alloc()/sock_release() public |
| 34 | * for NetROM and future kernel nfsd type |
| 35 | * stuff. |
| 36 | * Alan Cox : sendmsg/recvmsg basics. |
| 37 | * Tom Dyas : Export net symbols. |
| 38 | * Marcin Dalecki : Fixed problems with CONFIG_NET="n". |
| 39 | * Alan Cox : Added thread locking to sys_* calls |
| 40 | * for sockets. May have errors at the |
| 41 | * moment. |
| 42 | * Kevin Buhr : Fixed the dumb errors in the above. |
| 43 | * Andi Kleen : Some small cleanups, optimizations, |
| 44 | * and fixed a copy_from_user() bug. |
| 45 | * Tigran Aivazian : sys_send(args) calls sys_sendto(args, NULL, 0) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 46 | * Tigran Aivazian : Made listen(2) backlog sanity checks |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | * protocol-independent |
| 48 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | * This module is effectively the top level interface to the BSD socket |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 50 | * paradigm. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | * |
| 52 | * Based upon Swansea University Computer Society NET3.039 |
| 53 | */ |
| 54 | |
Jakub Kicinski | aef2fed | 2021-12-15 18:55:37 -0800 | [diff] [blame] | 55 | #include <linux/bpf-cgroup.h> |
Jakub Kicinski | cc69837 | 2020-11-20 14:50:52 -0800 | [diff] [blame] | 56 | #include <linux/ethtool.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | #include <linux/mm.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | #include <linux/socket.h> |
| 59 | #include <linux/file.h> |
David Howells | 2dc334f | 2023-06-07 19:19:09 +0100 | [diff] [blame] | 60 | #include <linux/splice.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | #include <linux/net.h> |
| 62 | #include <linux/interrupt.h> |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 63 | #include <linux/thread_info.h> |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 64 | #include <linux/rcupdate.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | #include <linux/netdevice.h> |
| 66 | #include <linux/proc_fs.h> |
| 67 | #include <linux/seq_file.h> |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 68 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | #include <linux/if_bridge.h> |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 70 | #include <linux/if_vlan.h> |
Daniel Borkmann | 408eccc | 2014-04-01 16:20:23 +0200 | [diff] [blame] | 71 | #include <linux/ptp_classify.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | #include <linux/init.h> |
| 73 | #include <linux/poll.h> |
| 74 | #include <linux/cache.h> |
| 75 | #include <linux/module.h> |
| 76 | #include <linux/highmem.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | #include <linux/mount.h> |
David Howells | fba9be4 | 2019-03-25 16:38:24 +0000 | [diff] [blame] | 78 | #include <linux/pseudo_fs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | #include <linux/security.h> |
| 80 | #include <linux/syscalls.h> |
| 81 | #include <linux/compat.h> |
| 82 | #include <linux/kmod.h> |
David Woodhouse | 3ec3b2f | 2005-05-17 12:08:48 +0100 | [diff] [blame] | 83 | #include <linux/audit.h> |
Adrian Bunk | d86b5e0 | 2006-01-21 00:46:55 +0100 | [diff] [blame] | 84 | #include <linux/wireless.h> |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 85 | #include <linux/nsproxy.h> |
Nick Black | 1fd7317d | 2009-09-22 16:43:33 -0700 | [diff] [blame] | 86 | #include <linux/magic.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 87 | #include <linux/slab.h> |
Masatake YAMATO | 600e177 | 2012-08-29 10:44:29 +0000 | [diff] [blame] | 88 | #include <linux/xattr.h> |
Jeremy Cline | c8e8cd5 | 2018-07-27 22:43:01 +0000 | [diff] [blame] | 89 | #include <linux/nospec.h> |
Paolo Abeni | 8c3c447 | 2019-05-03 17:01:39 +0200 | [diff] [blame] | 90 | #include <linux/indirect_call_wrapper.h> |
Pavel Begunkov | 8c9a6f5 | 2024-04-09 14:05:53 -0700 | [diff] [blame] | 91 | #include <linux/io_uring/net.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | |
Linus Torvalds | 7c0f6ba | 2016-12-24 11:46:01 -0800 | [diff] [blame] | 93 | #include <linux/uaccess.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | #include <asm/unistd.h> |
| 95 | |
| 96 | #include <net/compat.h> |
David S. Miller | 87de87d | 2008-06-03 09:14:03 -0700 | [diff] [blame] | 97 | #include <net/wext.h> |
Herbert Xu | f845172 | 2010-05-24 00:12:34 -0700 | [diff] [blame] | 98 | #include <net/cls_cgroup.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | |
| 100 | #include <net/sock.h> |
| 101 | #include <linux/netfilter.h> |
| 102 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 103 | #include <linux/if_tun.h> |
| 104 | #include <linux/ipv6_route.h> |
| 105 | #include <linux/route.h> |
Arnd Bergmann | c7dc504 | 2019-06-03 23:07:12 +0200 | [diff] [blame] | 106 | #include <linux/termios.h> |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 107 | #include <linux/sockios.h> |
Eliezer Tamir | 076bb0c | 2013-07-10 17:13:17 +0300 | [diff] [blame] | 108 | #include <net/busy_poll.h> |
Willem de Bruijn | f24b9be | 2014-08-04 22:11:45 -0400 | [diff] [blame] | 109 | #include <linux/errqueue.h> |
Yangbo Lu | d7c0882 | 2021-06-30 16:12:00 +0800 | [diff] [blame] | 110 | #include <linux/ptp_clock_kernel.h> |
Yunhui Cui | 6e6eda4 | 2023-01-11 14:59:30 +0800 | [diff] [blame] | 111 | #include <trace/events/sock.h> |
Eliezer Tamir | 0602129 | 2013-06-10 11:39:50 +0300 | [diff] [blame] | 112 | |
Cong Wang | e0d1095 | 2013-08-01 11:10:25 +0800 | [diff] [blame] | 113 | #ifdef CONFIG_NET_RX_BUSY_POLL |
Eliezer Tamir | 64b0dc5 | 2013-07-10 17:13:36 +0300 | [diff] [blame] | 114 | unsigned int sysctl_net_busy_read __read_mostly; |
| 115 | unsigned int sysctl_net_busy_poll __read_mostly; |
Eliezer Tamir | 0602129 | 2013-06-10 11:39:50 +0300 | [diff] [blame] | 116 | #endif |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 117 | |
Al Viro | 8ae5e030 | 2014-11-28 19:40:50 -0500 | [diff] [blame] | 118 | static ssize_t sock_read_iter(struct kiocb *iocb, struct iov_iter *to); |
| 119 | static ssize_t sock_write_iter(struct kiocb *iocb, struct iov_iter *from); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 120 | static int sock_mmap(struct file *file, struct vm_area_struct *vma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | |
| 122 | static int sock_close(struct inode *inode, struct file *file); |
Linus Torvalds | a11e1d4 | 2018-06-28 09:43:44 -0700 | [diff] [blame] | 123 | static __poll_t sock_poll(struct file *file, |
| 124 | struct poll_table_struct *wait); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 125 | static long sock_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 126 | #ifdef CONFIG_COMPAT |
| 127 | static long compat_sock_ioctl(struct file *file, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 128 | unsigned int cmd, unsigned long arg); |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 129 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | static int sock_fasync(int fd, struct file *filp, int on); |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 131 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 132 | struct pipe_inode_info *pipe, size_t len, |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 133 | unsigned int flags); |
David Howells | 2bfc668 | 2023-06-07 19:19:10 +0100 | [diff] [blame] | 134 | static void sock_splice_eof(struct file *file); |
Arnd Bergmann | 542d306 | 2020-01-08 22:44:43 +0100 | [diff] [blame] | 135 | |
| 136 | #ifdef CONFIG_PROC_FS |
| 137 | static void sock_show_fdinfo(struct seq_file *m, struct file *f) |
| 138 | { |
| 139 | struct socket *sock = f->private_data; |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 140 | const struct proto_ops *ops = READ_ONCE(sock->ops); |
Arnd Bergmann | 542d306 | 2020-01-08 22:44:43 +0100 | [diff] [blame] | 141 | |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 142 | if (ops->show_fdinfo) |
| 143 | ops->show_fdinfo(m, sock); |
Arnd Bergmann | 542d306 | 2020-01-08 22:44:43 +0100 | [diff] [blame] | 144 | } |
| 145 | #else |
| 146 | #define sock_show_fdinfo NULL |
| 147 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | /* |
| 150 | * Socket files have a set of 'special' operations as well as the generic file ones. These don't appear |
| 151 | * in the operation structures but are done directly via the socketcall() multiplexor. |
| 152 | */ |
| 153 | |
Arjan van de Ven | da7071d | 2007-02-12 00:55:36 -0800 | [diff] [blame] | 154 | static const struct file_operations socket_file_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | .owner = THIS_MODULE, |
| 156 | .llseek = no_llseek, |
Al Viro | 8ae5e030 | 2014-11-28 19:40:50 -0500 | [diff] [blame] | 157 | .read_iter = sock_read_iter, |
| 158 | .write_iter = sock_write_iter, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | .poll = sock_poll, |
| 160 | .unlocked_ioctl = sock_ioctl, |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 161 | #ifdef CONFIG_COMPAT |
| 162 | .compat_ioctl = compat_sock_ioctl, |
| 163 | #endif |
Breno Leitao | 8e9fad0 | 2023-06-27 06:44:24 -0700 | [diff] [blame] | 164 | .uring_cmd = io_uring_cmd_sock, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | .mmap = sock_mmap, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | .release = sock_close, |
| 167 | .fasync = sock_fasync, |
David Howells | 2dc334f | 2023-06-07 19:19:09 +0100 | [diff] [blame] | 168 | .splice_write = splice_to_socket, |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 169 | .splice_read = sock_splice_read, |
David Howells | 2bfc668 | 2023-06-07 19:19:10 +0100 | [diff] [blame] | 170 | .splice_eof = sock_splice_eof, |
Kirill Tkhai | b465334 | 2019-12-09 13:03:40 +0300 | [diff] [blame] | 171 | .show_fdinfo = sock_show_fdinfo, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | }; |
| 173 | |
Yejune Deng | fe0bdbd | 2021-06-21 13:12:25 +0800 | [diff] [blame] | 174 | static const char * const pf_family_names[] = { |
| 175 | [PF_UNSPEC] = "PF_UNSPEC", |
| 176 | [PF_UNIX] = "PF_UNIX/PF_LOCAL", |
| 177 | [PF_INET] = "PF_INET", |
| 178 | [PF_AX25] = "PF_AX25", |
| 179 | [PF_IPX] = "PF_IPX", |
| 180 | [PF_APPLETALK] = "PF_APPLETALK", |
| 181 | [PF_NETROM] = "PF_NETROM", |
| 182 | [PF_BRIDGE] = "PF_BRIDGE", |
| 183 | [PF_ATMPVC] = "PF_ATMPVC", |
| 184 | [PF_X25] = "PF_X25", |
| 185 | [PF_INET6] = "PF_INET6", |
| 186 | [PF_ROSE] = "PF_ROSE", |
| 187 | [PF_DECnet] = "PF_DECnet", |
| 188 | [PF_NETBEUI] = "PF_NETBEUI", |
| 189 | [PF_SECURITY] = "PF_SECURITY", |
| 190 | [PF_KEY] = "PF_KEY", |
| 191 | [PF_NETLINK] = "PF_NETLINK/PF_ROUTE", |
| 192 | [PF_PACKET] = "PF_PACKET", |
| 193 | [PF_ASH] = "PF_ASH", |
| 194 | [PF_ECONET] = "PF_ECONET", |
| 195 | [PF_ATMSVC] = "PF_ATMSVC", |
| 196 | [PF_RDS] = "PF_RDS", |
| 197 | [PF_SNA] = "PF_SNA", |
| 198 | [PF_IRDA] = "PF_IRDA", |
| 199 | [PF_PPPOX] = "PF_PPPOX", |
| 200 | [PF_WANPIPE] = "PF_WANPIPE", |
| 201 | [PF_LLC] = "PF_LLC", |
| 202 | [PF_IB] = "PF_IB", |
| 203 | [PF_MPLS] = "PF_MPLS", |
| 204 | [PF_CAN] = "PF_CAN", |
| 205 | [PF_TIPC] = "PF_TIPC", |
| 206 | [PF_BLUETOOTH] = "PF_BLUETOOTH", |
| 207 | [PF_IUCV] = "PF_IUCV", |
| 208 | [PF_RXRPC] = "PF_RXRPC", |
| 209 | [PF_ISDN] = "PF_ISDN", |
| 210 | [PF_PHONET] = "PF_PHONET", |
| 211 | [PF_IEEE802154] = "PF_IEEE802154", |
| 212 | [PF_CAIF] = "PF_CAIF", |
| 213 | [PF_ALG] = "PF_ALG", |
| 214 | [PF_NFC] = "PF_NFC", |
| 215 | [PF_VSOCK] = "PF_VSOCK", |
| 216 | [PF_KCM] = "PF_KCM", |
| 217 | [PF_QIPCRTR] = "PF_QIPCRTR", |
| 218 | [PF_SMC] = "PF_SMC", |
| 219 | [PF_XDP] = "PF_XDP", |
Jeremy Kerr | bc49d81 | 2021-07-29 10:20:39 +0800 | [diff] [blame] | 220 | [PF_MCTP] = "PF_MCTP", |
Yejune Deng | fe0bdbd | 2021-06-21 13:12:25 +0800 | [diff] [blame] | 221 | }; |
| 222 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | /* |
| 224 | * The protocol list. Each protocol is registered in here. |
| 225 | */ |
| 226 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | static DEFINE_SPINLOCK(net_family_lock); |
Eric Dumazet | 190683a | 2010-11-10 10:50:44 +0000 | [diff] [blame] | 228 | static const struct net_proto_family __rcu *net_families[NPROTO] __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 231 | * Support routines. |
| 232 | * Move socket addresses back and forth across the kernel/user |
| 233 | * divide and look after the messy bits. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | */ |
| 235 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | /** |
| 237 | * move_addr_to_kernel - copy a socket address into kernel space |
| 238 | * @uaddr: Address in user space |
| 239 | * @kaddr: Address in kernel space |
| 240 | * @ulen: Length in user space |
| 241 | * |
| 242 | * The address is copied into kernel space. If the provided address is |
| 243 | * too long an error code of -EINVAL is returned. If the copy gives |
| 244 | * invalid addresses -EFAULT is returned. On a success 0 is returned. |
| 245 | */ |
| 246 | |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 247 | int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | { |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 249 | if (ulen < 0 || ulen > sizeof(struct sockaddr_storage)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | return -EINVAL; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 251 | if (ulen == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | return 0; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 253 | if (copy_from_user(kaddr, uaddr, ulen)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | return -EFAULT; |
David Woodhouse | 3ec3b2f | 2005-05-17 12:08:48 +0100 | [diff] [blame] | 255 | return audit_sockaddr(ulen, kaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | } |
| 257 | |
| 258 | /** |
| 259 | * move_addr_to_user - copy an address to user space |
| 260 | * @kaddr: kernel space address |
| 261 | * @klen: length of address in kernel |
| 262 | * @uaddr: user space address |
| 263 | * @ulen: pointer to user length field |
| 264 | * |
| 265 | * The value pointed to by ulen on entry is the buffer length available. |
| 266 | * This is overwritten with the buffer space used. -EINVAL is returned |
| 267 | * if an overlong buffer is specified or a negative buffer size. -EFAULT |
| 268 | * is returned if either the buffer or the length field are not |
| 269 | * accessible. |
| 270 | * After copying the data up to the limit the user specifies, the true |
| 271 | * length of the data is written over the length limit the user |
| 272 | * specified. Zero is returned for a success. |
| 273 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 274 | |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 275 | static int move_addr_to_user(struct sockaddr_storage *kaddr, int klen, |
stephen hemminger | 11165f1 | 2010-10-18 14:27:29 +0000 | [diff] [blame] | 276 | void __user *uaddr, int __user *ulen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | { |
| 278 | int err; |
| 279 | int len; |
| 280 | |
Hannes Frederic Sowa | 68c6beb | 2013-11-21 03:14:34 +0100 | [diff] [blame] | 281 | BUG_ON(klen > sizeof(struct sockaddr_storage)); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 282 | err = get_user(len, ulen); |
| 283 | if (err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | return err; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 285 | if (len > klen) |
| 286 | len = klen; |
Hannes Frederic Sowa | 68c6beb | 2013-11-21 03:14:34 +0100 | [diff] [blame] | 287 | if (len < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | return -EINVAL; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 289 | if (len) { |
Steve Grubb | d6fe394 | 2006-03-30 12:20:22 -0500 | [diff] [blame] | 290 | if (audit_sockaddr(klen, kaddr)) |
| 291 | return -ENOMEM; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 292 | if (copy_to_user(uaddr, kaddr, len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | return -EFAULT; |
| 294 | } |
| 295 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 296 | * "fromlen shall refer to the value before truncation.." |
| 297 | * 1003.1g |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | */ |
| 299 | return __put_user(klen, ulen); |
| 300 | } |
| 301 | |
Alexey Dobriyan | 08009a7 | 2018-02-24 21:20:33 +0300 | [diff] [blame] | 302 | static struct kmem_cache *sock_inode_cachep __ro_after_init; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | |
| 304 | static struct inode *sock_alloc_inode(struct super_block *sb) |
| 305 | { |
| 306 | struct socket_alloc *ei; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 307 | |
Muchun Song | fd60b28 | 2022-03-22 14:41:03 -0700 | [diff] [blame] | 308 | ei = alloc_inode_sb(sb, sock_inode_cachep, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | if (!ei) |
| 310 | return NULL; |
Al Viro | 333f790 | 2019-07-05 20:14:16 +0100 | [diff] [blame] | 311 | init_waitqueue_head(&ei->socket.wq.wait); |
| 312 | ei->socket.wq.fasync_list = NULL; |
| 313 | ei->socket.wq.flags = 0; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 314 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | ei->socket.state = SS_UNCONNECTED; |
| 316 | ei->socket.flags = 0; |
| 317 | ei->socket.ops = NULL; |
| 318 | ei->socket.sk = NULL; |
| 319 | ei->socket.file = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | |
| 321 | return &ei->vfs_inode; |
| 322 | } |
| 323 | |
Al Viro | 6d7855c | 2019-07-05 20:13:22 +0100 | [diff] [blame] | 324 | static void sock_free_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | { |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 326 | struct socket_alloc *ei; |
| 327 | |
| 328 | ei = container_of(inode, struct socket_alloc, vfs_inode); |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 329 | kmem_cache_free(sock_inode_cachep, ei); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | } |
| 331 | |
Alexey Dobriyan | 51cc506 | 2008-07-25 19:45:34 -0700 | [diff] [blame] | 332 | static void init_once(void *foo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 334 | struct socket_alloc *ei = (struct socket_alloc *)foo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 336 | inode_init_once(&ei->vfs_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 338 | |
yuan linyu | 1e91163 | 2017-01-07 17:18:31 +0800 | [diff] [blame] | 339 | static void init_inodecache(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | { |
| 341 | sock_inode_cachep = kmem_cache_create("sock_inode_cache", |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 342 | sizeof(struct socket_alloc), |
| 343 | 0, |
| 344 | (SLAB_HWCACHE_ALIGN | |
| 345 | SLAB_RECLAIM_ACCOUNT | |
Chengming Zhou | d4f01c5 | 2024-02-28 03:06:58 +0000 | [diff] [blame] | 346 | SLAB_ACCOUNT), |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 347 | init_once); |
yuan linyu | 1e91163 | 2017-01-07 17:18:31 +0800 | [diff] [blame] | 348 | BUG_ON(sock_inode_cachep == NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | } |
| 350 | |
Alexey Dobriyan | b87221d | 2009-09-21 17:01:09 -0700 | [diff] [blame] | 351 | static const struct super_operations sockfs_ops = { |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 352 | .alloc_inode = sock_alloc_inode, |
Al Viro | 6d7855c | 2019-07-05 20:13:22 +0100 | [diff] [blame] | 353 | .free_inode = sock_free_inode, |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 354 | .statfs = simple_statfs, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | }; |
| 356 | |
Eric Dumazet | c23fbb6 | 2007-05-08 00:26:18 -0700 | [diff] [blame] | 357 | /* |
| 358 | * sockfs_dname() is called from d_path(). |
| 359 | */ |
| 360 | static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen) |
| 361 | { |
Al Viro | 0f60d28 | 2022-01-30 15:03:49 -0500 | [diff] [blame] | 362 | return dynamic_dname(buffer, buflen, "socket:[%lu]", |
David Howells | c5ef603 | 2015-03-17 22:26:16 +0000 | [diff] [blame] | 363 | d_inode(dentry)->i_ino); |
Eric Dumazet | c23fbb6 | 2007-05-08 00:26:18 -0700 | [diff] [blame] | 364 | } |
| 365 | |
Al Viro | 3ba13d1 | 2009-02-20 06:02:22 +0000 | [diff] [blame] | 366 | static const struct dentry_operations sockfs_dentry_operations = { |
Eric Dumazet | c23fbb6 | 2007-05-08 00:26:18 -0700 | [diff] [blame] | 367 | .d_dname = sockfs_dname, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | }; |
| 369 | |
Andreas Gruenbacher | bba0bd3 | 2016-09-29 17:48:35 +0200 | [diff] [blame] | 370 | static int sockfs_xattr_get(const struct xattr_handler *handler, |
| 371 | struct dentry *dentry, struct inode *inode, |
| 372 | const char *suffix, void *value, size_t size) |
| 373 | { |
| 374 | if (value) { |
| 375 | if (dentry->d_name.len + 1 > size) |
| 376 | return -ERANGE; |
| 377 | memcpy(value, dentry->d_name.name, dentry->d_name.len + 1); |
| 378 | } |
| 379 | return dentry->d_name.len + 1; |
| 380 | } |
| 381 | |
| 382 | #define XATTR_SOCKPROTONAME_SUFFIX "sockprotoname" |
| 383 | #define XATTR_NAME_SOCKPROTONAME (XATTR_SYSTEM_PREFIX XATTR_SOCKPROTONAME_SUFFIX) |
| 384 | #define XATTR_NAME_SOCKPROTONAME_LEN (sizeof(XATTR_NAME_SOCKPROTONAME)-1) |
| 385 | |
| 386 | static const struct xattr_handler sockfs_xattr_handler = { |
| 387 | .name = XATTR_NAME_SOCKPROTONAME, |
| 388 | .get = sockfs_xattr_get, |
| 389 | }; |
| 390 | |
Andreas Gruenbacher | 4a59015 | 2016-11-13 21:23:34 +0100 | [diff] [blame] | 391 | static int sockfs_security_xattr_set(const struct xattr_handler *handler, |
Christian Brauner | 39f60c1 | 2023-01-13 12:49:23 +0100 | [diff] [blame] | 392 | struct mnt_idmap *idmap, |
Andreas Gruenbacher | 4a59015 | 2016-11-13 21:23:34 +0100 | [diff] [blame] | 393 | struct dentry *dentry, struct inode *inode, |
| 394 | const char *suffix, const void *value, |
| 395 | size_t size, int flags) |
| 396 | { |
| 397 | /* Handled by LSM. */ |
| 398 | return -EAGAIN; |
| 399 | } |
| 400 | |
| 401 | static const struct xattr_handler sockfs_security_xattr_handler = { |
| 402 | .prefix = XATTR_SECURITY_PREFIX, |
| 403 | .set = sockfs_security_xattr_set, |
| 404 | }; |
| 405 | |
Wedson Almeida Filho | 295d3c4 | 2023-09-30 02:00:33 -0300 | [diff] [blame] | 406 | static const struct xattr_handler * const sockfs_xattr_handlers[] = { |
Andreas Gruenbacher | bba0bd3 | 2016-09-29 17:48:35 +0200 | [diff] [blame] | 407 | &sockfs_xattr_handler, |
Andreas Gruenbacher | 4a59015 | 2016-11-13 21:23:34 +0100 | [diff] [blame] | 408 | &sockfs_security_xattr_handler, |
Andreas Gruenbacher | bba0bd3 | 2016-09-29 17:48:35 +0200 | [diff] [blame] | 409 | NULL |
| 410 | }; |
| 411 | |
David Howells | fba9be4 | 2019-03-25 16:38:24 +0000 | [diff] [blame] | 412 | static int sockfs_init_fs_context(struct fs_context *fc) |
Al Viro | c74a1cb | 2011-01-12 16:59:34 -0500 | [diff] [blame] | 413 | { |
David Howells | fba9be4 | 2019-03-25 16:38:24 +0000 | [diff] [blame] | 414 | struct pseudo_fs_context *ctx = init_pseudo(fc, SOCKFS_MAGIC); |
| 415 | if (!ctx) |
| 416 | return -ENOMEM; |
| 417 | ctx->ops = &sockfs_ops; |
| 418 | ctx->dops = &sockfs_dentry_operations; |
| 419 | ctx->xattr = sockfs_xattr_handlers; |
| 420 | return 0; |
Al Viro | c74a1cb | 2011-01-12 16:59:34 -0500 | [diff] [blame] | 421 | } |
| 422 | |
| 423 | static struct vfsmount *sock_mnt __read_mostly; |
| 424 | |
| 425 | static struct file_system_type sock_fs_type = { |
| 426 | .name = "sockfs", |
David Howells | fba9be4 | 2019-03-25 16:38:24 +0000 | [diff] [blame] | 427 | .init_fs_context = sockfs_init_fs_context, |
Al Viro | c74a1cb | 2011-01-12 16:59:34 -0500 | [diff] [blame] | 428 | .kill_sb = kill_anon_super, |
| 429 | }; |
| 430 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | /* |
| 432 | * Obtains the first available file descriptor and sets it up for use. |
| 433 | * |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 434 | * These functions create file structures and maps them to fd space |
| 435 | * of the current process. On success it returns file descriptor |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | * and file struct implicitly stored in sock->file. |
| 437 | * Note that another thread may close file descriptor before we return |
| 438 | * from this function. We use the fact that now we do not refer |
| 439 | * to socket after mapping. If one day we will need it, this |
| 440 | * function will increment ref. count on file by 1. |
| 441 | * |
| 442 | * In any case returned fd MAY BE not valid! |
| 443 | * This race condition is unavoidable |
| 444 | * with shared fd spaces, we cannot solve it inside kernel, |
| 445 | * but we take care of internal coherence yet. |
| 446 | */ |
| 447 | |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 448 | /** |
| 449 | * sock_alloc_file - Bind a &socket to a &file |
| 450 | * @sock: socket |
| 451 | * @flags: file status flags |
| 452 | * @dname: protocol name |
| 453 | * |
| 454 | * Returns the &file bound with @sock, implicitly storing it |
| 455 | * in sock->file. If dname is %NULL, sets to "". |
Thadeu Lima de Souza Cascardo | 649c15c | 2023-03-07 14:37:07 -0300 | [diff] [blame] | 456 | * |
| 457 | * On failure @sock is released, and an ERR pointer is returned. |
| 458 | * |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 459 | * This function uses GFP_KERNEL internally. |
| 460 | */ |
| 461 | |
Linus Torvalds | aab174f | 2012-10-02 20:25:04 -0700 | [diff] [blame] | 462 | struct file *sock_alloc_file(struct socket *sock, int flags, const char *dname) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | { |
Al Viro | 7cbe66b | 2009-08-05 19:59:08 +0400 | [diff] [blame] | 464 | struct file *file; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 465 | |
Al Viro | d93aa9d | 2018-06-09 09:40:05 -0400 | [diff] [blame] | 466 | if (!dname) |
| 467 | dname = sock->sk ? sock->sk->sk_prot_creator->name : ""; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | |
Al Viro | d93aa9d | 2018-06-09 09:40:05 -0400 | [diff] [blame] | 469 | file = alloc_file_pseudo(SOCK_INODE(sock), sock_mnt, dname, |
| 470 | O_RDWR | (flags & O_NONBLOCK), |
| 471 | &socket_file_ops); |
Viresh Kumar | b5ffe63 | 2015-08-12 15:59:47 +0530 | [diff] [blame] | 472 | if (IS_ERR(file)) { |
Al Viro | 8e1611e | 2017-12-05 23:29:09 +0000 | [diff] [blame] | 473 | sock_release(sock); |
Anatol Pomozov | 39b65252 | 2012-09-12 20:11:55 -0700 | [diff] [blame] | 474 | return file; |
Al Viro | cc3808f | 2009-08-06 09:43:59 +0400 | [diff] [blame] | 475 | } |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 476 | |
Jens Axboe | fe34db0 | 2023-05-09 09:19:08 -0600 | [diff] [blame] | 477 | file->f_mode |= FMODE_NOWAIT; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 478 | sock->file = file; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 479 | file->private_data = sock; |
Linus Torvalds | d8e464e | 2019-11-17 11:20:48 -0800 | [diff] [blame] | 480 | stream_open(SOCK_INODE(sock), file); |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 481 | return file; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 482 | } |
Al Viro | 56b31d1 | 2012-08-18 00:25:51 -0400 | [diff] [blame] | 483 | EXPORT_SYMBOL(sock_alloc_file); |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 484 | |
Al Viro | 56b31d1 | 2012-08-18 00:25:51 -0400 | [diff] [blame] | 485 | static int sock_map_fd(struct socket *sock, int flags) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 486 | { |
| 487 | struct file *newfile; |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 488 | int fd = get_unused_fd_flags(flags); |
Al Viro | ce4bb04 | 2018-01-10 18:47:05 -0500 | [diff] [blame] | 489 | if (unlikely(fd < 0)) { |
| 490 | sock_release(sock); |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 491 | return fd; |
Al Viro | ce4bb04 | 2018-01-10 18:47:05 -0500 | [diff] [blame] | 492 | } |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 493 | |
Linus Torvalds | aab174f | 2012-10-02 20:25:04 -0700 | [diff] [blame] | 494 | newfile = sock_alloc_file(sock, flags, NULL); |
Enrico Weigelt | 4546e44 | 2019-06-05 22:58:50 +0200 | [diff] [blame] | 495 | if (!IS_ERR(newfile)) { |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 496 | fd_install(fd, newfile); |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 497 | return fd; |
| 498 | } |
Al Viro | 7cbe66b | 2009-08-05 19:59:08 +0400 | [diff] [blame] | 499 | |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 500 | put_unused_fd(fd); |
| 501 | return PTR_ERR(newfile); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | } |
| 503 | |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 504 | /** |
| 505 | * sock_from_file - Return the &socket bounded to @file. |
| 506 | * @file: file |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 507 | * |
Florent Revest | dba4a92 | 2020-12-04 12:36:04 +0100 | [diff] [blame] | 508 | * On failure returns %NULL. |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 509 | */ |
| 510 | |
Florent Revest | dba4a92 | 2020-12-04 12:36:04 +0100 | [diff] [blame] | 511 | struct socket *sock_from_file(struct file *file) |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 512 | { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 513 | if (file->f_op == &socket_file_ops) |
Jens Axboe | da214a4 | 2022-04-12 14:22:39 -0600 | [diff] [blame] | 514 | return file->private_data; /* set in sock_alloc_file */ |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 515 | |
Eric Dumazet | 23bb80d | 2007-02-08 14:59:57 -0800 | [diff] [blame] | 516 | return NULL; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 517 | } |
John Fastabend | 406a3c6 | 2012-07-20 10:39:25 +0000 | [diff] [blame] | 518 | EXPORT_SYMBOL(sock_from_file); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 519 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | /** |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 521 | * sockfd_lookup - Go from a file number to its socket slot |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | * @fd: file handle |
| 523 | * @err: pointer to an error code return |
| 524 | * |
| 525 | * The file handle passed in is locked and the socket it is bound |
Rosen, Rami | 241c466 | 2017-05-21 22:12:38 +0300 | [diff] [blame] | 526 | * to is returned. If an error occurs the err pointer is overwritten |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | * with a negative errno code and NULL is returned. The function checks |
| 528 | * for both invalid handles and passing a handle which is not a socket. |
| 529 | * |
| 530 | * On a success the socket object pointer is returned. |
| 531 | */ |
| 532 | |
| 533 | struct socket *sockfd_lookup(int fd, int *err) |
| 534 | { |
| 535 | struct file *file; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | struct socket *sock; |
| 537 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 538 | file = fget(fd); |
| 539 | if (!file) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | *err = -EBADF; |
| 541 | return NULL; |
| 542 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 543 | |
Florent Revest | dba4a92 | 2020-12-04 12:36:04 +0100 | [diff] [blame] | 544 | sock = sock_from_file(file); |
| 545 | if (!sock) { |
| 546 | *err = -ENOTSOCK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | fput(file); |
Florent Revest | dba4a92 | 2020-12-04 12:36:04 +0100 | [diff] [blame] | 548 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | return sock; |
| 550 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 551 | EXPORT_SYMBOL(sockfd_lookup); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 553 | static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed) |
| 554 | { |
Al Viro | 00e188e | 2014-03-03 23:48:18 -0500 | [diff] [blame] | 555 | struct fd f = fdget(fd); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 556 | struct socket *sock; |
| 557 | |
Hua Zhong | 3672558 | 2006-04-19 15:25:02 -0700 | [diff] [blame] | 558 | *err = -EBADF; |
Al Viro | 00e188e | 2014-03-03 23:48:18 -0500 | [diff] [blame] | 559 | if (f.file) { |
Florent Revest | dba4a92 | 2020-12-04 12:36:04 +0100 | [diff] [blame] | 560 | sock = sock_from_file(f.file); |
Al Viro | 00e188e | 2014-03-03 23:48:18 -0500 | [diff] [blame] | 561 | if (likely(sock)) { |
Miaohe Lin | ce787a5 | 2020-08-06 19:53:16 +0800 | [diff] [blame] | 562 | *fput_needed = f.flags & FDPUT_FPUT; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 563 | return sock; |
Al Viro | 00e188e | 2014-03-03 23:48:18 -0500 | [diff] [blame] | 564 | } |
Florent Revest | dba4a92 | 2020-12-04 12:36:04 +0100 | [diff] [blame] | 565 | *err = -ENOTSOCK; |
Al Viro | 00e188e | 2014-03-03 23:48:18 -0500 | [diff] [blame] | 566 | fdput(f); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 567 | } |
| 568 | return NULL; |
| 569 | } |
| 570 | |
Masatake YAMATO | 600e177 | 2012-08-29 10:44:29 +0000 | [diff] [blame] | 571 | static ssize_t sockfs_listxattr(struct dentry *dentry, char *buffer, |
| 572 | size_t size) |
| 573 | { |
| 574 | ssize_t len; |
| 575 | ssize_t used = 0; |
| 576 | |
David Howells | c5ef603 | 2015-03-17 22:26:16 +0000 | [diff] [blame] | 577 | len = security_inode_listsecurity(d_inode(dentry), buffer, size); |
Masatake YAMATO | 600e177 | 2012-08-29 10:44:29 +0000 | [diff] [blame] | 578 | if (len < 0) |
| 579 | return len; |
| 580 | used += len; |
| 581 | if (buffer) { |
| 582 | if (size < used) |
| 583 | return -ERANGE; |
| 584 | buffer += len; |
| 585 | } |
| 586 | |
| 587 | len = (XATTR_NAME_SOCKPROTONAME_LEN + 1); |
| 588 | used += len; |
| 589 | if (buffer) { |
| 590 | if (size < used) |
| 591 | return -ERANGE; |
| 592 | memcpy(buffer, XATTR_NAME_SOCKPROTONAME, len); |
| 593 | buffer += len; |
| 594 | } |
| 595 | |
| 596 | return used; |
| 597 | } |
| 598 | |
Christian Brauner | c1632a0 | 2023-01-13 12:49:11 +0100 | [diff] [blame] | 599 | static int sockfs_setattr(struct mnt_idmap *idmap, |
Christian Brauner | 549c729 | 2021-01-21 14:19:43 +0100 | [diff] [blame] | 600 | struct dentry *dentry, struct iattr *iattr) |
Lorenzo Colitti | 86741ec | 2016-11-04 02:23:41 +0900 | [diff] [blame] | 601 | { |
Christian Brauner | c1632a0 | 2023-01-13 12:49:11 +0100 | [diff] [blame] | 602 | int err = simple_setattr(&nop_mnt_idmap, dentry, iattr); |
Lorenzo Colitti | 86741ec | 2016-11-04 02:23:41 +0900 | [diff] [blame] | 603 | |
Eric Biggers | e1a3a60 | 2016-12-30 17:42:32 -0600 | [diff] [blame] | 604 | if (!err && (iattr->ia_valid & ATTR_UID)) { |
Lorenzo Colitti | 86741ec | 2016-11-04 02:23:41 +0900 | [diff] [blame] | 605 | struct socket *sock = SOCKET_I(d_inode(dentry)); |
| 606 | |
Cong Wang | 6d8c50d | 2018-06-07 13:39:49 -0700 | [diff] [blame] | 607 | if (sock->sk) |
| 608 | sock->sk->sk_uid = iattr->ia_uid; |
| 609 | else |
| 610 | err = -ENOENT; |
Lorenzo Colitti | 86741ec | 2016-11-04 02:23:41 +0900 | [diff] [blame] | 611 | } |
| 612 | |
| 613 | return err; |
| 614 | } |
| 615 | |
Masatake YAMATO | 600e177 | 2012-08-29 10:44:29 +0000 | [diff] [blame] | 616 | static const struct inode_operations sockfs_inode_ops = { |
Masatake YAMATO | 600e177 | 2012-08-29 10:44:29 +0000 | [diff] [blame] | 617 | .listxattr = sockfs_listxattr, |
Lorenzo Colitti | 86741ec | 2016-11-04 02:23:41 +0900 | [diff] [blame] | 618 | .setattr = sockfs_setattr, |
Masatake YAMATO | 600e177 | 2012-08-29 10:44:29 +0000 | [diff] [blame] | 619 | }; |
| 620 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | /** |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 622 | * sock_alloc - allocate a socket |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 623 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | * Allocate a new inode and socket object. The two are bound together |
| 625 | * and initialised. The socket is then returned. If we are out of inodes |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 626 | * NULL is returned. This functions uses GFP_KERNEL internally. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | */ |
| 628 | |
Tom Herbert | f4a00aa | 2016-03-07 14:11:01 -0800 | [diff] [blame] | 629 | struct socket *sock_alloc(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 631 | struct inode *inode; |
| 632 | struct socket *sock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | |
Eric Dumazet | a209dfc | 2011-07-26 11:36:34 +0200 | [diff] [blame] | 634 | inode = new_inode_pseudo(sock_mnt->mnt_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | if (!inode) |
| 636 | return NULL; |
| 637 | |
| 638 | sock = SOCKET_I(inode); |
| 639 | |
Christoph Hellwig | 85fe402 | 2010-10-23 11:19:54 -0400 | [diff] [blame] | 640 | inode->i_ino = get_next_ino(); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 641 | inode->i_mode = S_IFSOCK | S_IRWXUGO; |
David Howells | 8192b0c | 2008-11-14 10:39:10 +1100 | [diff] [blame] | 642 | inode->i_uid = current_fsuid(); |
| 643 | inode->i_gid = current_fsgid(); |
Masatake YAMATO | 600e177 | 2012-08-29 10:44:29 +0000 | [diff] [blame] | 644 | inode->i_op = &sockfs_inode_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | return sock; |
| 647 | } |
Tom Herbert | f4a00aa | 2016-03-07 14:11:01 -0800 | [diff] [blame] | 648 | EXPORT_SYMBOL(sock_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | |
Cong Wang | 6d8c50d | 2018-06-07 13:39:49 -0700 | [diff] [blame] | 650 | static void __sock_release(struct socket *sock, struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | { |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 652 | const struct proto_ops *ops = READ_ONCE(sock->ops); |
| 653 | |
| 654 | if (ops) { |
| 655 | struct module *owner = ops->owner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | |
Cong Wang | 6d8c50d | 2018-06-07 13:39:49 -0700 | [diff] [blame] | 657 | if (inode) |
| 658 | inode_lock(inode); |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 659 | ops->release(sock); |
Eric Biggers | ff7b11a | 2019-02-21 14:13:56 -0800 | [diff] [blame] | 660 | sock->sk = NULL; |
Cong Wang | 6d8c50d | 2018-06-07 13:39:49 -0700 | [diff] [blame] | 661 | if (inode) |
| 662 | inode_unlock(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | sock->ops = NULL; |
| 664 | module_put(owner); |
| 665 | } |
| 666 | |
Al Viro | 333f790 | 2019-07-05 20:14:16 +0100 | [diff] [blame] | 667 | if (sock->wq.fasync_list) |
Yang Yingliang | 3410f22 | 2014-02-12 17:09:55 +0800 | [diff] [blame] | 668 | pr_err("%s: fasync list not empty!\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | if (!sock->file) { |
| 671 | iput(SOCK_INODE(sock)); |
| 672 | return; |
| 673 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 674 | sock->file = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | } |
Cong Wang | 6d8c50d | 2018-06-07 13:39:49 -0700 | [diff] [blame] | 676 | |
Andrew Lunn | 9a8ad9a | 2020-07-13 01:15:12 +0200 | [diff] [blame] | 677 | /** |
| 678 | * sock_release - close a socket |
| 679 | * @sock: socket to close |
| 680 | * |
| 681 | * The socket is released from the protocol stack if it has a release |
| 682 | * callback, and the inode is then released if the socket is bound to |
| 683 | * an inode not a file. |
| 684 | */ |
Cong Wang | 6d8c50d | 2018-06-07 13:39:49 -0700 | [diff] [blame] | 685 | void sock_release(struct socket *sock) |
| 686 | { |
| 687 | __sock_release(sock, NULL); |
| 688 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 689 | EXPORT_SYMBOL(sock_release); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | |
Soheil Hassas Yeganeh | c14ac94 | 2016-04-02 23:08:12 -0400 | [diff] [blame] | 691 | void __sock_tx_timestamp(__u16 tsflags, __u8 *tx_flags) |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 692 | { |
Eric Dumazet | 140c55d | 2014-08-06 11:49:29 +0200 | [diff] [blame] | 693 | u8 flags = *tx_flags; |
| 694 | |
Gerhard Engleder | 51eb749 | 2022-05-06 22:01:38 +0200 | [diff] [blame] | 695 | if (tsflags & SOF_TIMESTAMPING_TX_HARDWARE) { |
Eric Dumazet | 140c55d | 2014-08-06 11:49:29 +0200 | [diff] [blame] | 696 | flags |= SKBTX_HW_TSTAMP; |
| 697 | |
Gerhard Engleder | 51eb749 | 2022-05-06 22:01:38 +0200 | [diff] [blame] | 698 | /* PTP hardware clocks can provide a free running cycle counter |
| 699 | * as a time base for virtual clocks. Tell driver to use the |
| 700 | * free running cycle counter for timestamp if socket is bound |
| 701 | * to virtual clock. |
| 702 | */ |
| 703 | if (tsflags & SOF_TIMESTAMPING_BIND_PHC) |
| 704 | flags |= SKBTX_HW_TSTAMP_USE_CYCLES; |
| 705 | } |
| 706 | |
Soheil Hassas Yeganeh | c14ac94 | 2016-04-02 23:08:12 -0400 | [diff] [blame] | 707 | if (tsflags & SOF_TIMESTAMPING_TX_SOFTWARE) |
Eric Dumazet | 140c55d | 2014-08-06 11:49:29 +0200 | [diff] [blame] | 708 | flags |= SKBTX_SW_TSTAMP; |
| 709 | |
Soheil Hassas Yeganeh | c14ac94 | 2016-04-02 23:08:12 -0400 | [diff] [blame] | 710 | if (tsflags & SOF_TIMESTAMPING_TX_SCHED) |
Eric Dumazet | 140c55d | 2014-08-06 11:49:29 +0200 | [diff] [blame] | 711 | flags |= SKBTX_SCHED_TSTAMP; |
| 712 | |
Eric Dumazet | 140c55d | 2014-08-06 11:49:29 +0200 | [diff] [blame] | 713 | *tx_flags = flags; |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 714 | } |
Willem de Bruijn | 67cc0d4 | 2014-09-08 19:58:58 -0400 | [diff] [blame] | 715 | EXPORT_SYMBOL(__sock_tx_timestamp); |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 716 | |
Paolo Abeni | 8c3c447 | 2019-05-03 17:01:39 +0200 | [diff] [blame] | 717 | INDIRECT_CALLABLE_DECLARE(int inet_sendmsg(struct socket *, struct msghdr *, |
| 718 | size_t)); |
Paolo Abeni | a648a59 | 2019-07-03 16:06:54 +0200 | [diff] [blame] | 719 | INDIRECT_CALLABLE_DECLARE(int inet6_sendmsg(struct socket *, struct msghdr *, |
| 720 | size_t)); |
Yunhui Cui | 6e6eda4 | 2023-01-11 14:59:30 +0800 | [diff] [blame] | 721 | |
| 722 | static noinline void call_trace_sock_send_length(struct sock *sk, int ret, |
| 723 | int flags) |
| 724 | { |
| 725 | trace_sock_send_length(sk, ret, 0); |
| 726 | } |
| 727 | |
Al Viro | d8725c8 | 2014-12-11 00:02:50 -0500 | [diff] [blame] | 728 | static inline int sock_sendmsg_nosec(struct socket *sock, struct msghdr *msg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | { |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 730 | int ret = INDIRECT_CALL_INET(READ_ONCE(sock->ops)->sendmsg, inet6_sendmsg, |
Paolo Abeni | a648a59 | 2019-07-03 16:06:54 +0200 | [diff] [blame] | 731 | inet_sendmsg, sock, msg, |
| 732 | msg_data_left(msg)); |
Al Viro | d8725c8 | 2014-12-11 00:02:50 -0500 | [diff] [blame] | 733 | BUG_ON(ret == -EIOCBQUEUED); |
Yunhui Cui | 6e6eda4 | 2023-01-11 14:59:30 +0800 | [diff] [blame] | 734 | |
| 735 | if (trace_sock_send_length_enabled()) |
| 736 | call_trace_sock_send_length(sock->sk, ret, 0); |
Al Viro | d8725c8 | 2014-12-11 00:02:50 -0500 | [diff] [blame] | 737 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | } |
Gu Zheng | 0cf00c6 | 2014-12-05 15:14:23 +0800 | [diff] [blame] | 739 | |
Jordan Rife | 86a7e0b | 2023-09-21 18:46:41 -0500 | [diff] [blame] | 740 | static int __sock_sendmsg(struct socket *sock, struct msghdr *msg) |
| 741 | { |
| 742 | int err = security_socket_sendmsg(sock, msg, |
| 743 | msg_data_left(msg)); |
| 744 | |
| 745 | return err ?: sock_sendmsg_nosec(sock, msg); |
| 746 | } |
| 747 | |
Randy Dunlap | 85806af | 2019-05-18 21:23:07 -0700 | [diff] [blame] | 748 | /** |
| 749 | * sock_sendmsg - send a message through @sock |
| 750 | * @sock: socket |
| 751 | * @msg: message to send |
| 752 | * |
| 753 | * Sends @msg through @sock, passing through LSM. |
| 754 | * Returns the number of bytes sent, or an error code. |
| 755 | */ |
Al Viro | d8725c8 | 2014-12-11 00:02:50 -0500 | [diff] [blame] | 756 | int sock_sendmsg(struct socket *sock, struct msghdr *msg) |
Gu Zheng | 0cf00c6 | 2014-12-05 15:14:23 +0800 | [diff] [blame] | 757 | { |
Jordan Rife | 86a7e0b | 2023-09-21 18:46:41 -0500 | [diff] [blame] | 758 | struct sockaddr_storage *save_addr = (struct sockaddr_storage *)msg->msg_name; |
| 759 | struct sockaddr_storage address; |
Marc Dionne | 01b2885 | 2023-12-21 09:12:30 -0400 | [diff] [blame] | 760 | int save_len = msg->msg_namelen; |
Jordan Rife | 86a7e0b | 2023-09-21 18:46:41 -0500 | [diff] [blame] | 761 | int ret; |
Ying Xue | 1b78414 | 2015-03-02 15:37:48 +0800 | [diff] [blame] | 762 | |
Jordan Rife | 86a7e0b | 2023-09-21 18:46:41 -0500 | [diff] [blame] | 763 | if (msg->msg_name) { |
| 764 | memcpy(&address, msg->msg_name, msg->msg_namelen); |
| 765 | msg->msg_name = &address; |
| 766 | } |
| 767 | |
| 768 | ret = __sock_sendmsg(sock, msg); |
| 769 | msg->msg_name = save_addr; |
Marc Dionne | 01b2885 | 2023-12-21 09:12:30 -0400 | [diff] [blame] | 770 | msg->msg_namelen = save_len; |
Jordan Rife | 86a7e0b | 2023-09-21 18:46:41 -0500 | [diff] [blame] | 771 | |
| 772 | return ret; |
Gu Zheng | 0cf00c6 | 2014-12-05 15:14:23 +0800 | [diff] [blame] | 773 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 774 | EXPORT_SYMBOL(sock_sendmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 776 | /** |
| 777 | * kernel_sendmsg - send a message through @sock (kernel-space) |
| 778 | * @sock: socket |
| 779 | * @msg: message header |
| 780 | * @vec: kernel vec |
| 781 | * @num: vec array length |
| 782 | * @size: total message data size |
| 783 | * |
| 784 | * Builds the message data with @vec and sends it through @sock. |
| 785 | * Returns the number of bytes sent, or an error code. |
| 786 | */ |
| 787 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | int kernel_sendmsg(struct socket *sock, struct msghdr *msg, |
| 789 | struct kvec *vec, size_t num, size_t size) |
| 790 | { |
Al Viro | de4eda9 | 2022-09-15 20:25:47 -0400 | [diff] [blame] | 791 | iov_iter_kvec(&msg->msg_iter, ITER_SOURCE, vec, num, size); |
Al Viro | d8725c8 | 2014-12-11 00:02:50 -0500 | [diff] [blame] | 792 | return sock_sendmsg(sock, msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 794 | EXPORT_SYMBOL(kernel_sendmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 796 | /** |
| 797 | * kernel_sendmsg_locked - send a message through @sock (kernel-space) |
| 798 | * @sk: sock |
| 799 | * @msg: message header |
| 800 | * @vec: output s/g array |
| 801 | * @num: output s/g array length |
| 802 | * @size: total message data size |
| 803 | * |
| 804 | * Builds the message data with @vec and sends it through @sock. |
| 805 | * Returns the number of bytes sent, or an error code. |
| 806 | * Caller must hold @sk. |
| 807 | */ |
| 808 | |
Tom Herbert | 306b13e | 2017-07-28 16:22:41 -0700 | [diff] [blame] | 809 | int kernel_sendmsg_locked(struct sock *sk, struct msghdr *msg, |
| 810 | struct kvec *vec, size_t num, size_t size) |
| 811 | { |
| 812 | struct socket *sock = sk->sk_socket; |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 813 | const struct proto_ops *ops = READ_ONCE(sock->ops); |
Tom Herbert | 306b13e | 2017-07-28 16:22:41 -0700 | [diff] [blame] | 814 | |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 815 | if (!ops->sendmsg_locked) |
John Fastabend | db5980d | 2017-08-15 22:31:34 -0700 | [diff] [blame] | 816 | return sock_no_sendmsg_locked(sk, msg, size); |
Tom Herbert | 306b13e | 2017-07-28 16:22:41 -0700 | [diff] [blame] | 817 | |
Al Viro | de4eda9 | 2022-09-15 20:25:47 -0400 | [diff] [blame] | 818 | iov_iter_kvec(&msg->msg_iter, ITER_SOURCE, vec, num, size); |
Tom Herbert | 306b13e | 2017-07-28 16:22:41 -0700 | [diff] [blame] | 819 | |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 820 | return ops->sendmsg_locked(sk, msg, msg_data_left(msg)); |
Tom Herbert | 306b13e | 2017-07-28 16:22:41 -0700 | [diff] [blame] | 821 | } |
| 822 | EXPORT_SYMBOL(kernel_sendmsg_locked); |
| 823 | |
Soheil Hassas Yeganeh | 8605330a | 2017-03-18 17:02:59 -0400 | [diff] [blame] | 824 | static bool skb_is_err_queue(const struct sk_buff *skb) |
| 825 | { |
| 826 | /* pkt_type of skbs enqueued on the error queue are set to |
| 827 | * PACKET_OUTGOING in skb_set_err_queue(). This is only safe to do |
| 828 | * in recvmsg, since skbs received on a local socket will never |
| 829 | * have a pkt_type of PACKET_OUTGOING. |
| 830 | */ |
| 831 | return skb->pkt_type == PACKET_OUTGOING; |
| 832 | } |
| 833 | |
Miroslav Lichvar | b50a5c7 | 2017-05-19 17:52:40 +0200 | [diff] [blame] | 834 | /* On transmit, software and hardware timestamps are returned independently. |
| 835 | * As the two skb clones share the hardware timestamp, which may be updated |
| 836 | * before the software timestamp is received, a hardware TX timestamp may be |
| 837 | * returned only if there is no software TX timestamp. Ignore false software |
| 838 | * timestamps, which may be made in the __sock_recv_timestamp() call when the |
Deepa Dinamani | 7f1bc6e | 2019-02-02 07:34:46 -0800 | [diff] [blame] | 839 | * option SO_TIMESTAMP_OLD(NS) is enabled on the socket, even when the skb has a |
Miroslav Lichvar | b50a5c7 | 2017-05-19 17:52:40 +0200 | [diff] [blame] | 840 | * hardware timestamp. |
| 841 | */ |
| 842 | static bool skb_is_swtx_tstamp(const struct sk_buff *skb, int false_tstamp) |
| 843 | { |
| 844 | return skb->tstamp && !false_tstamp && skb_is_err_queue(skb); |
| 845 | } |
| 846 | |
Gerhard Engleder | 97dc7cd | 2022-05-06 22:01:40 +0200 | [diff] [blame] | 847 | static ktime_t get_timestamp(struct sock *sk, struct sk_buff *skb, int *if_index) |
| 848 | { |
Eric Dumazet | e3390b3 | 2023-08-31 13:52:11 +0000 | [diff] [blame] | 849 | bool cycles = READ_ONCE(sk->sk_tsflags) & SOF_TIMESTAMPING_BIND_PHC; |
Gerhard Engleder | 97dc7cd | 2022-05-06 22:01:40 +0200 | [diff] [blame] | 850 | struct skb_shared_hwtstamps *shhwtstamps = skb_hwtstamps(skb); |
| 851 | struct net_device *orig_dev; |
| 852 | ktime_t hwtstamp; |
| 853 | |
| 854 | rcu_read_lock(); |
| 855 | orig_dev = dev_get_by_napi_id(skb_napi_id(skb)); |
| 856 | if (orig_dev) { |
| 857 | *if_index = orig_dev->ifindex; |
| 858 | hwtstamp = netdev_get_tstamp(orig_dev, shhwtstamps, cycles); |
| 859 | } else { |
| 860 | hwtstamp = shhwtstamps->hwtstamp; |
| 861 | } |
| 862 | rcu_read_unlock(); |
| 863 | |
| 864 | return hwtstamp; |
| 865 | } |
| 866 | |
| 867 | static void put_ts_pktinfo(struct msghdr *msg, struct sk_buff *skb, |
| 868 | int if_index) |
Miroslav Lichvar | aad9c8c | 2017-05-19 17:52:38 +0200 | [diff] [blame] | 869 | { |
| 870 | struct scm_ts_pktinfo ts_pktinfo; |
| 871 | struct net_device *orig_dev; |
| 872 | |
| 873 | if (!skb_mac_header_was_set(skb)) |
| 874 | return; |
| 875 | |
| 876 | memset(&ts_pktinfo, 0, sizeof(ts_pktinfo)); |
| 877 | |
Gerhard Engleder | 97dc7cd | 2022-05-06 22:01:40 +0200 | [diff] [blame] | 878 | if (!if_index) { |
| 879 | rcu_read_lock(); |
| 880 | orig_dev = dev_get_by_napi_id(skb_napi_id(skb)); |
| 881 | if (orig_dev) |
| 882 | if_index = orig_dev->ifindex; |
| 883 | rcu_read_unlock(); |
| 884 | } |
| 885 | ts_pktinfo.if_index = if_index; |
Miroslav Lichvar | aad9c8c | 2017-05-19 17:52:38 +0200 | [diff] [blame] | 886 | |
| 887 | ts_pktinfo.pkt_length = skb->len - skb_mac_offset(skb); |
| 888 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPING_PKTINFO, |
| 889 | sizeof(ts_pktinfo), &ts_pktinfo); |
| 890 | } |
| 891 | |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 892 | /* |
| 893 | * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP) |
| 894 | */ |
| 895 | void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, |
| 896 | struct sk_buff *skb) |
| 897 | { |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 898 | int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP); |
Deepa Dinamani | 887feae | 2019-02-02 07:34:50 -0800 | [diff] [blame] | 899 | int new_tstamp = sock_flag(sk, SOCK_TSTAMP_NEW); |
Deepa Dinamani | 9718475 | 2019-02-02 07:34:51 -0800 | [diff] [blame] | 900 | struct scm_timestamping_internal tss; |
Miroslav Lichvar | b50a5c7 | 2017-05-19 17:52:40 +0200 | [diff] [blame] | 901 | int empty = 1, false_tstamp = 0; |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 902 | struct skb_shared_hwtstamps *shhwtstamps = |
| 903 | skb_hwtstamps(skb); |
Gerhard Engleder | 97dc7cd | 2022-05-06 22:01:40 +0200 | [diff] [blame] | 904 | int if_index; |
Miroslav Lichvar | 007747a9 | 2022-01-05 11:33:26 +0100 | [diff] [blame] | 905 | ktime_t hwtstamp; |
Eric Dumazet | e3390b3 | 2023-08-31 13:52:11 +0000 | [diff] [blame] | 906 | u32 tsflags; |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 907 | |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 908 | /* Race occurred between timestamp enabling and packet |
| 909 | receiving. Fill in the current time for now. */ |
Miroslav Lichvar | b50a5c7 | 2017-05-19 17:52:40 +0200 | [diff] [blame] | 910 | if (need_software_tstamp && skb->tstamp == 0) { |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 911 | __net_timestamp(skb); |
Miroslav Lichvar | b50a5c7 | 2017-05-19 17:52:40 +0200 | [diff] [blame] | 912 | false_tstamp = 1; |
| 913 | } |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 914 | |
| 915 | if (need_software_tstamp) { |
| 916 | if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { |
Deepa Dinamani | 887feae | 2019-02-02 07:34:50 -0800 | [diff] [blame] | 917 | if (new_tstamp) { |
| 918 | struct __kernel_sock_timeval tv; |
| 919 | |
| 920 | skb_get_new_timestamp(skb, &tv); |
| 921 | put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMP_NEW, |
| 922 | sizeof(tv), &tv); |
| 923 | } else { |
| 924 | struct __kernel_old_timeval tv; |
| 925 | |
| 926 | skb_get_timestamp(skb, &tv); |
| 927 | put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMP_OLD, |
| 928 | sizeof(tv), &tv); |
| 929 | } |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 930 | } else { |
Deepa Dinamani | 887feae | 2019-02-02 07:34:50 -0800 | [diff] [blame] | 931 | if (new_tstamp) { |
| 932 | struct __kernel_timespec ts; |
| 933 | |
| 934 | skb_get_new_timestampns(skb, &ts); |
| 935 | put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMPNS_NEW, |
| 936 | sizeof(ts), &ts); |
| 937 | } else { |
Arnd Bergmann | df1b4ba | 2019-10-25 22:04:46 +0200 | [diff] [blame] | 938 | struct __kernel_old_timespec ts; |
Deepa Dinamani | 887feae | 2019-02-02 07:34:50 -0800 | [diff] [blame] | 939 | |
| 940 | skb_get_timestampns(skb, &ts); |
| 941 | put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMPNS_OLD, |
| 942 | sizeof(ts), &ts); |
| 943 | } |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 944 | } |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 945 | } |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 946 | |
Willem de Bruijn | f24b9be | 2014-08-04 22:11:45 -0400 | [diff] [blame] | 947 | memset(&tss, 0, sizeof(tss)); |
Eric Dumazet | e3390b3 | 2023-08-31 13:52:11 +0000 | [diff] [blame] | 948 | tsflags = READ_ONCE(sk->sk_tsflags); |
| 949 | if ((tsflags & SOF_TIMESTAMPING_SOFTWARE) && |
Deepa Dinamani | 9718475 | 2019-02-02 07:34:51 -0800 | [diff] [blame] | 950 | ktime_to_timespec64_cond(skb->tstamp, tss.ts + 0)) |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 951 | empty = 0; |
Willem de Bruijn | 4d276eb | 2014-07-25 18:01:32 -0400 | [diff] [blame] | 952 | if (shhwtstamps && |
Eric Dumazet | e3390b3 | 2023-08-31 13:52:11 +0000 | [diff] [blame] | 953 | (tsflags & SOF_TIMESTAMPING_RAW_HARDWARE) && |
Yangbo Lu | d7c0882 | 2021-06-30 16:12:00 +0800 | [diff] [blame] | 954 | !skb_is_swtx_tstamp(skb, false_tstamp)) { |
Gerhard Engleder | 97dc7cd | 2022-05-06 22:01:40 +0200 | [diff] [blame] | 955 | if_index = 0; |
| 956 | if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP_NETDEV) |
| 957 | hwtstamp = get_timestamp(sk, skb, &if_index); |
Miroslav Lichvar | 007747a9 | 2022-01-05 11:33:26 +0100 | [diff] [blame] | 958 | else |
| 959 | hwtstamp = shhwtstamps->hwtstamp; |
Yangbo Lu | d7c0882 | 2021-06-30 16:12:00 +0800 | [diff] [blame] | 960 | |
Eric Dumazet | e3390b3 | 2023-08-31 13:52:11 +0000 | [diff] [blame] | 961 | if (tsflags & SOF_TIMESTAMPING_BIND_PHC) |
Gerhard Engleder | 97dc7cd | 2022-05-06 22:01:40 +0200 | [diff] [blame] | 962 | hwtstamp = ptp_convert_timestamp(&hwtstamp, |
Eric Dumazet | 251cd40 | 2023-08-31 13:52:12 +0000 | [diff] [blame] | 963 | READ_ONCE(sk->sk_bind_phc)); |
Gerhard Engleder | 97dc7cd | 2022-05-06 22:01:40 +0200 | [diff] [blame] | 964 | |
Miroslav Lichvar | 007747a9 | 2022-01-05 11:33:26 +0100 | [diff] [blame] | 965 | if (ktime_to_timespec64_cond(hwtstamp, tss.ts + 2)) { |
Yangbo Lu | d7c0882 | 2021-06-30 16:12:00 +0800 | [diff] [blame] | 966 | empty = 0; |
| 967 | |
Eric Dumazet | e3390b3 | 2023-08-31 13:52:11 +0000 | [diff] [blame] | 968 | if ((tsflags & SOF_TIMESTAMPING_OPT_PKTINFO) && |
Yangbo Lu | d7c0882 | 2021-06-30 16:12:00 +0800 | [diff] [blame] | 969 | !skb_is_err_queue(skb)) |
Gerhard Engleder | 97dc7cd | 2022-05-06 22:01:40 +0200 | [diff] [blame] | 970 | put_ts_pktinfo(msg, skb, if_index); |
Yangbo Lu | d7c0882 | 2021-06-30 16:12:00 +0800 | [diff] [blame] | 971 | } |
Miroslav Lichvar | aad9c8c | 2017-05-19 17:52:38 +0200 | [diff] [blame] | 972 | } |
Francis Yan | 1c88580 | 2016-11-27 23:07:18 -0800 | [diff] [blame] | 973 | if (!empty) { |
Deepa Dinamani | 9718475 | 2019-02-02 07:34:51 -0800 | [diff] [blame] | 974 | if (sock_flag(sk, SOCK_TSTAMP_NEW)) |
| 975 | put_cmsg_scm_timestamping64(msg, &tss); |
| 976 | else |
| 977 | put_cmsg_scm_timestamping(msg, &tss); |
Francis Yan | 1c88580 | 2016-11-27 23:07:18 -0800 | [diff] [blame] | 978 | |
Soheil Hassas Yeganeh | 8605330a | 2017-03-18 17:02:59 -0400 | [diff] [blame] | 979 | if (skb_is_err_queue(skb) && skb->len && |
Soheil Hassas Yeganeh | 4ef1b28 | 2017-03-18 17:03:00 -0400 | [diff] [blame] | 980 | SKB_EXT_ERR(skb)->opt_stats) |
Francis Yan | 1c88580 | 2016-11-27 23:07:18 -0800 | [diff] [blame] | 981 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPING_OPT_STATS, |
| 982 | skb->len, skb->data); |
| 983 | } |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 984 | } |
Arnaldo Carvalho de Melo | 7c81fd8 | 2007-03-10 00:39:35 -0300 | [diff] [blame] | 985 | EXPORT_SYMBOL_GPL(__sock_recv_timestamp); |
| 986 | |
Jakub Kicinski | eb6fba7 | 2023-04-17 08:53:46 -0700 | [diff] [blame] | 987 | #ifdef CONFIG_WIRELESS |
Johannes Berg | 6e3e939 | 2011-11-09 10:15:42 +0100 | [diff] [blame] | 988 | void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk, |
| 989 | struct sk_buff *skb) |
| 990 | { |
| 991 | int ack; |
| 992 | |
| 993 | if (!sock_flag(sk, SOCK_WIFI_STATUS)) |
| 994 | return; |
| 995 | if (!skb->wifi_acked_valid) |
| 996 | return; |
| 997 | |
| 998 | ack = skb->wifi_acked; |
| 999 | |
| 1000 | put_cmsg(msg, SOL_SOCKET, SCM_WIFI_STATUS, sizeof(ack), &ack); |
| 1001 | } |
| 1002 | EXPORT_SYMBOL_GPL(__sock_recv_wifi_status); |
Jakub Kicinski | eb6fba7 | 2023-04-17 08:53:46 -0700 | [diff] [blame] | 1003 | #endif |
Johannes Berg | 6e3e939 | 2011-11-09 10:15:42 +0100 | [diff] [blame] | 1004 | |
stephen hemminger | 11165f1 | 2010-10-18 14:27:29 +0000 | [diff] [blame] | 1005 | static inline void sock_recv_drops(struct msghdr *msg, struct sock *sk, |
| 1006 | struct sk_buff *skb) |
Neil Horman | 3b88578 | 2009-10-12 13:26:31 -0700 | [diff] [blame] | 1007 | { |
Eyal Birger | 744d5a3 | 2015-03-01 14:58:31 +0200 | [diff] [blame] | 1008 | if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && SOCK_SKB_CB(skb)->dropcount) |
Neil Horman | 3b88578 | 2009-10-12 13:26:31 -0700 | [diff] [blame] | 1009 | put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL, |
Eyal Birger | 744d5a3 | 2015-03-01 14:58:31 +0200 | [diff] [blame] | 1010 | sizeof(__u32), &SOCK_SKB_CB(skb)->dropcount); |
Neil Horman | 3b88578 | 2009-10-12 13:26:31 -0700 | [diff] [blame] | 1011 | } |
| 1012 | |
Erin MacNeil | 6fd1d51 | 2022-04-27 16:02:37 -0400 | [diff] [blame] | 1013 | static void sock_recv_mark(struct msghdr *msg, struct sock *sk, |
| 1014 | struct sk_buff *skb) |
| 1015 | { |
Eric Dumazet | 2558b80 | 2023-02-13 16:00:59 +0000 | [diff] [blame] | 1016 | if (sock_flag(sk, SOCK_RCVMARK) && skb) { |
| 1017 | /* We must use a bounce buffer for CONFIG_HARDENED_USERCOPY=y */ |
| 1018 | __u32 mark = skb->mark; |
| 1019 | |
| 1020 | put_cmsg(msg, SOL_SOCKET, SO_MARK, sizeof(__u32), &mark); |
| 1021 | } |
Erin MacNeil | 6fd1d51 | 2022-04-27 16:02:37 -0400 | [diff] [blame] | 1022 | } |
| 1023 | |
| 1024 | void __sock_recv_cmsgs(struct msghdr *msg, struct sock *sk, |
| 1025 | struct sk_buff *skb) |
Neil Horman | 3b88578 | 2009-10-12 13:26:31 -0700 | [diff] [blame] | 1026 | { |
| 1027 | sock_recv_timestamp(msg, sk, skb); |
| 1028 | sock_recv_drops(msg, sk, skb); |
Erin MacNeil | 6fd1d51 | 2022-04-27 16:02:37 -0400 | [diff] [blame] | 1029 | sock_recv_mark(msg, sk, skb); |
Neil Horman | 3b88578 | 2009-10-12 13:26:31 -0700 | [diff] [blame] | 1030 | } |
Erin MacNeil | 6fd1d51 | 2022-04-27 16:02:37 -0400 | [diff] [blame] | 1031 | EXPORT_SYMBOL_GPL(__sock_recv_cmsgs); |
Neil Horman | 3b88578 | 2009-10-12 13:26:31 -0700 | [diff] [blame] | 1032 | |
Paolo Abeni | 8c3c447 | 2019-05-03 17:01:39 +0200 | [diff] [blame] | 1033 | INDIRECT_CALLABLE_DECLARE(int inet_recvmsg(struct socket *, struct msghdr *, |
Paolo Abeni | a648a59 | 2019-07-03 16:06:54 +0200 | [diff] [blame] | 1034 | size_t, int)); |
| 1035 | INDIRECT_CALLABLE_DECLARE(int inet6_recvmsg(struct socket *, struct msghdr *, |
| 1036 | size_t, int)); |
Yunhui Cui | 6e6eda4 | 2023-01-11 14:59:30 +0800 | [diff] [blame] | 1037 | |
| 1038 | static noinline void call_trace_sock_recv_length(struct sock *sk, int ret, int flags) |
| 1039 | { |
| 1040 | trace_sock_recv_length(sk, ret, flags); |
| 1041 | } |
| 1042 | |
Ying Xue | 1b78414 | 2015-03-02 15:37:48 +0800 | [diff] [blame] | 1043 | static inline int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg, |
Al Viro | 2da6290 | 2015-03-14 21:13:46 -0400 | [diff] [blame] | 1044 | int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1045 | { |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1046 | int ret = INDIRECT_CALL_INET(READ_ONCE(sock->ops)->recvmsg, |
| 1047 | inet6_recvmsg, |
Yunhui Cui | 6e6eda4 | 2023-01-11 14:59:30 +0800 | [diff] [blame] | 1048 | inet_recvmsg, sock, msg, |
| 1049 | msg_data_left(msg), flags); |
| 1050 | if (trace_sock_recv_length_enabled()) |
| 1051 | call_trace_sock_recv_length(sock->sk, ret, flags); |
| 1052 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1053 | } |
| 1054 | |
Randy Dunlap | 85806af | 2019-05-18 21:23:07 -0700 | [diff] [blame] | 1055 | /** |
| 1056 | * sock_recvmsg - receive a message from @sock |
| 1057 | * @sock: socket |
| 1058 | * @msg: message to receive |
| 1059 | * @flags: message flags |
| 1060 | * |
| 1061 | * Receives @msg from @sock, passing through LSM. Returns the total number |
| 1062 | * of bytes received, or an error. |
| 1063 | */ |
Al Viro | 2da6290 | 2015-03-14 21:13:46 -0400 | [diff] [blame] | 1064 | int sock_recvmsg(struct socket *sock, struct msghdr *msg, int flags) |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 1065 | { |
Al Viro | 2da6290 | 2015-03-14 21:13:46 -0400 | [diff] [blame] | 1066 | int err = security_socket_recvmsg(sock, msg, msg_data_left(msg), flags); |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 1067 | |
Al Viro | 2da6290 | 2015-03-14 21:13:46 -0400 | [diff] [blame] | 1068 | return err ?: sock_recvmsg_nosec(sock, msg, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1069 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1070 | EXPORT_SYMBOL(sock_recvmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | |
Martin Lucina | c1249c0 | 2010-12-10 00:04:05 +0000 | [diff] [blame] | 1072 | /** |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 1073 | * kernel_recvmsg - Receive a message from a socket (kernel space) |
| 1074 | * @sock: The socket to receive the message from |
| 1075 | * @msg: Received message |
| 1076 | * @vec: Input s/g array for message data |
| 1077 | * @num: Size of input s/g array |
| 1078 | * @size: Number of bytes to read |
| 1079 | * @flags: Message flags (MSG_DONTWAIT, etc...) |
Martin Lucina | c1249c0 | 2010-12-10 00:04:05 +0000 | [diff] [blame] | 1080 | * |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 1081 | * On return the msg structure contains the scatter/gather array passed in the |
| 1082 | * vec argument. The array is modified so that it consists of the unfilled |
| 1083 | * portion of the original array. |
Martin Lucina | c1249c0 | 2010-12-10 00:04:05 +0000 | [diff] [blame] | 1084 | * |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 1085 | * The returned value is the total number of bytes received, or an error. |
Martin Lucina | c1249c0 | 2010-12-10 00:04:05 +0000 | [diff] [blame] | 1086 | */ |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 1087 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1088 | int kernel_recvmsg(struct socket *sock, struct msghdr *msg, |
| 1089 | struct kvec *vec, size_t num, size_t size, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1090 | { |
Christoph Hellwig | 1f466e1 | 2020-05-11 13:59:13 +0200 | [diff] [blame] | 1091 | msg->msg_control_is_user = false; |
Al Viro | de4eda9 | 2022-09-15 20:25:47 -0400 | [diff] [blame] | 1092 | iov_iter_kvec(&msg->msg_iter, ITER_DEST, vec, num, size); |
Christoph Hellwig | 1f466e1 | 2020-05-11 13:59:13 +0200 | [diff] [blame] | 1093 | return sock_recvmsg(sock, msg, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1095 | EXPORT_SYMBOL(kernel_recvmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1096 | |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 1097 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1098 | struct pipe_inode_info *pipe, size_t len, |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 1099 | unsigned int flags) |
| 1100 | { |
| 1101 | struct socket *sock = file->private_data; |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1102 | const struct proto_ops *ops; |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 1103 | |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1104 | ops = READ_ONCE(sock->ops); |
| 1105 | if (unlikely(!ops->splice_read)) |
David Howells | 67178fd | 2023-05-22 14:50:00 +0100 | [diff] [blame] | 1106 | return copy_splice_read(file, ppos, pipe, len, flags); |
Rémi Denis-Courmont | 997b37d | 2008-02-15 02:35:45 -0800 | [diff] [blame] | 1107 | |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1108 | return ops->splice_read(sock, ppos, pipe, len, flags); |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 1109 | } |
| 1110 | |
David Howells | 2bfc668 | 2023-06-07 19:19:10 +0100 | [diff] [blame] | 1111 | static void sock_splice_eof(struct file *file) |
| 1112 | { |
| 1113 | struct socket *sock = file->private_data; |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1114 | const struct proto_ops *ops; |
David Howells | 2bfc668 | 2023-06-07 19:19:10 +0100 | [diff] [blame] | 1115 | |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1116 | ops = READ_ONCE(sock->ops); |
| 1117 | if (ops->splice_eof) |
| 1118 | ops->splice_eof(sock); |
David Howells | 2bfc668 | 2023-06-07 19:19:10 +0100 | [diff] [blame] | 1119 | } |
| 1120 | |
Al Viro | 8ae5e030 | 2014-11-28 19:40:50 -0500 | [diff] [blame] | 1121 | static ssize_t sock_read_iter(struct kiocb *iocb, struct iov_iter *to) |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 1122 | { |
Al Viro | 6d65233 | 2015-01-30 16:12:56 -0500 | [diff] [blame] | 1123 | struct file *file = iocb->ki_filp; |
| 1124 | struct socket *sock = file->private_data; |
tadeusz.struk@intel.com | 0345f93 | 2015-03-19 12:31:25 -0700 | [diff] [blame] | 1125 | struct msghdr msg = {.msg_iter = *to, |
| 1126 | .msg_iocb = iocb}; |
Al Viro | 8ae5e030 | 2014-11-28 19:40:50 -0500 | [diff] [blame] | 1127 | ssize_t res; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 1128 | |
Jens Axboe | ebfcd89 | 2019-12-09 20:58:56 -0700 | [diff] [blame] | 1129 | if (file->f_flags & O_NONBLOCK || (iocb->ki_flags & IOCB_NOWAIT)) |
Al Viro | 8ae5e030 | 2014-11-28 19:40:50 -0500 | [diff] [blame] | 1130 | msg.msg_flags = MSG_DONTWAIT; |
| 1131 | |
| 1132 | if (iocb->ki_pos != 0) |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 1133 | return -ESPIPE; |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 1134 | |
Christoph Hellwig | 66ee59a | 2015-02-11 19:56:46 +0100 | [diff] [blame] | 1135 | if (!iov_iter_count(to)) /* Match SYS5 behaviour */ |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 1136 | return 0; |
| 1137 | |
Al Viro | 2da6290 | 2015-03-14 21:13:46 -0400 | [diff] [blame] | 1138 | res = sock_recvmsg(sock, &msg, msg.msg_flags); |
Al Viro | 8ae5e030 | 2014-11-28 19:40:50 -0500 | [diff] [blame] | 1139 | *to = msg.msg_iter; |
| 1140 | return res; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 1141 | } |
| 1142 | |
Al Viro | 8ae5e030 | 2014-11-28 19:40:50 -0500 | [diff] [blame] | 1143 | static ssize_t sock_write_iter(struct kiocb *iocb, struct iov_iter *from) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | { |
Al Viro | 6d65233 | 2015-01-30 16:12:56 -0500 | [diff] [blame] | 1145 | struct file *file = iocb->ki_filp; |
| 1146 | struct socket *sock = file->private_data; |
tadeusz.struk@intel.com | 0345f93 | 2015-03-19 12:31:25 -0700 | [diff] [blame] | 1147 | struct msghdr msg = {.msg_iter = *from, |
| 1148 | .msg_iocb = iocb}; |
Al Viro | 8ae5e030 | 2014-11-28 19:40:50 -0500 | [diff] [blame] | 1149 | ssize_t res; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 1150 | |
Al Viro | 8ae5e030 | 2014-11-28 19:40:50 -0500 | [diff] [blame] | 1151 | if (iocb->ki_pos != 0) |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 1152 | return -ESPIPE; |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 1153 | |
Jens Axboe | ebfcd89 | 2019-12-09 20:58:56 -0700 | [diff] [blame] | 1154 | if (file->f_flags & O_NONBLOCK || (iocb->ki_flags & IOCB_NOWAIT)) |
Al Viro | 8ae5e030 | 2014-11-28 19:40:50 -0500 | [diff] [blame] | 1155 | msg.msg_flags = MSG_DONTWAIT; |
| 1156 | |
Al Viro | 6d65233 | 2015-01-30 16:12:56 -0500 | [diff] [blame] | 1157 | if (sock->type == SOCK_SEQPACKET) |
| 1158 | msg.msg_flags |= MSG_EOR; |
| 1159 | |
Jordan Rife | 86a7e0b | 2023-09-21 18:46:41 -0500 | [diff] [blame] | 1160 | res = __sock_sendmsg(sock, &msg); |
Al Viro | 8ae5e030 | 2014-11-28 19:40:50 -0500 | [diff] [blame] | 1161 | *from = msg.msg_iter; |
| 1162 | return res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1163 | } |
| 1164 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | /* |
| 1166 | * Atomic setting of ioctl hooks to avoid race |
| 1167 | * with module unload. |
| 1168 | */ |
| 1169 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1170 | static DEFINE_MUTEX(br_ioctl_mutex); |
Arnd Bergmann | ad2f99a | 2021-07-27 15:45:16 +0200 | [diff] [blame] | 1171 | static int (*br_ioctl_hook)(struct net *net, struct net_bridge *br, |
| 1172 | unsigned int cmd, struct ifreq *ifr, |
| 1173 | void __user *uarg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1174 | |
Arnd Bergmann | ad2f99a | 2021-07-27 15:45:16 +0200 | [diff] [blame] | 1175 | void brioctl_set(int (*hook)(struct net *net, struct net_bridge *br, |
| 1176 | unsigned int cmd, struct ifreq *ifr, |
| 1177 | void __user *uarg)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1178 | { |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1179 | mutex_lock(&br_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1180 | br_ioctl_hook = hook; |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1181 | mutex_unlock(&br_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1182 | } |
| 1183 | EXPORT_SYMBOL(brioctl_set); |
| 1184 | |
Arnd Bergmann | ad2f99a | 2021-07-27 15:45:16 +0200 | [diff] [blame] | 1185 | int br_ioctl_call(struct net *net, struct net_bridge *br, unsigned int cmd, |
| 1186 | struct ifreq *ifr, void __user *uarg) |
| 1187 | { |
| 1188 | int err = -ENOPKG; |
| 1189 | |
| 1190 | if (!br_ioctl_hook) |
| 1191 | request_module("bridge"); |
| 1192 | |
| 1193 | mutex_lock(&br_ioctl_mutex); |
| 1194 | if (br_ioctl_hook) |
| 1195 | err = br_ioctl_hook(net, br, cmd, ifr, uarg); |
| 1196 | mutex_unlock(&br_ioctl_mutex); |
| 1197 | |
| 1198 | return err; |
| 1199 | } |
| 1200 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1201 | static DEFINE_MUTEX(vlan_ioctl_mutex); |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1202 | static int (*vlan_ioctl_hook) (struct net *, void __user *arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1203 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1204 | void vlan_ioctl_set(int (*hook) (struct net *, void __user *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1205 | { |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1206 | mutex_lock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1207 | vlan_ioctl_hook = hook; |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1208 | mutex_unlock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1209 | } |
| 1210 | EXPORT_SYMBOL(vlan_ioctl_set); |
| 1211 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 1212 | static long sock_do_ioctl(struct net *net, struct socket *sock, |
Johannes Berg | 63ff03a | 2019-01-25 22:43:17 +0100 | [diff] [blame] | 1213 | unsigned int cmd, unsigned long arg) |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 1214 | { |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1215 | const struct proto_ops *ops = READ_ONCE(sock->ops); |
Arnd Bergmann | 876f0bf | 2021-07-22 16:29:02 +0200 | [diff] [blame] | 1216 | struct ifreq ifr; |
| 1217 | bool need_copyout; |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 1218 | int err; |
| 1219 | void __user *argp = (void __user *)arg; |
Arnd Bergmann | a554bf9 | 2021-07-27 15:45:12 +0200 | [diff] [blame] | 1220 | void __user *data; |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 1221 | |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1222 | err = ops->ioctl(sock, cmd, arg); |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 1223 | |
| 1224 | /* |
| 1225 | * If this ioctl is unknown try to hand it down |
| 1226 | * to the NIC driver. |
| 1227 | */ |
Al Viro | 36fd633 | 2017-06-26 13:19:16 -0400 | [diff] [blame] | 1228 | if (err != -ENOIOCTLCMD) |
| 1229 | return err; |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 1230 | |
Jakub Kicinski | 29ce8f9 | 2021-08-31 09:06:04 -0700 | [diff] [blame] | 1231 | if (!is_socket_ioctl_cmd(cmd)) |
| 1232 | return -ENOTTY; |
| 1233 | |
Arnd Bergmann | a554bf9 | 2021-07-27 15:45:12 +0200 | [diff] [blame] | 1234 | if (get_user_ifreq(&ifr, &data, argp)) |
Arnd Bergmann | 876f0bf | 2021-07-22 16:29:02 +0200 | [diff] [blame] | 1235 | return -EFAULT; |
Arnd Bergmann | a554bf9 | 2021-07-27 15:45:12 +0200 | [diff] [blame] | 1236 | err = dev_ioctl(net, cmd, &ifr, data, &need_copyout); |
Arnd Bergmann | 876f0bf | 2021-07-22 16:29:02 +0200 | [diff] [blame] | 1237 | if (!err && need_copyout) |
Arnd Bergmann | a554bf9 | 2021-07-27 15:45:12 +0200 | [diff] [blame] | 1238 | if (put_user_ifreq(&ifr, argp)) |
Al Viro | 36fd633 | 2017-06-26 13:19:16 -0400 | [diff] [blame] | 1239 | return -EFAULT; |
Arnd Bergmann | 876f0bf | 2021-07-22 16:29:02 +0200 | [diff] [blame] | 1240 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 1241 | return err; |
| 1242 | } |
| 1243 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1244 | /* |
| 1245 | * With an ioctl, arg may well be a user mode pointer, but we don't know |
| 1246 | * what to do with it - that's up to the protocol still. |
| 1247 | */ |
| 1248 | |
| 1249 | static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) |
| 1250 | { |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1251 | const struct proto_ops *ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1252 | struct socket *sock; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1253 | struct sock *sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1254 | void __user *argp = (void __user *)arg; |
| 1255 | int pid, err; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1256 | struct net *net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1257 | |
Eric Dumazet | b69aee0 | 2005-09-06 14:42:45 -0700 | [diff] [blame] | 1258 | sock = file->private_data; |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1259 | ops = READ_ONCE(sock->ops); |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1260 | sk = sock->sk; |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 1261 | net = sock_net(sk); |
Al Viro | 44c02a2 | 2017-10-05 12:59:44 -0400 | [diff] [blame] | 1262 | if (unlikely(cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15))) { |
| 1263 | struct ifreq ifr; |
Arnd Bergmann | a554bf9 | 2021-07-27 15:45:12 +0200 | [diff] [blame] | 1264 | void __user *data; |
Al Viro | 44c02a2 | 2017-10-05 12:59:44 -0400 | [diff] [blame] | 1265 | bool need_copyout; |
Arnd Bergmann | a554bf9 | 2021-07-27 15:45:12 +0200 | [diff] [blame] | 1266 | if (get_user_ifreq(&ifr, &data, argp)) |
Al Viro | 44c02a2 | 2017-10-05 12:59:44 -0400 | [diff] [blame] | 1267 | return -EFAULT; |
Arnd Bergmann | a554bf9 | 2021-07-27 15:45:12 +0200 | [diff] [blame] | 1268 | err = dev_ioctl(net, cmd, &ifr, data, &need_copyout); |
Al Viro | 44c02a2 | 2017-10-05 12:59:44 -0400 | [diff] [blame] | 1269 | if (!err && need_copyout) |
Arnd Bergmann | a554bf9 | 2021-07-27 15:45:12 +0200 | [diff] [blame] | 1270 | if (put_user_ifreq(&ifr, argp)) |
Al Viro | 44c02a2 | 2017-10-05 12:59:44 -0400 | [diff] [blame] | 1271 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1272 | } else |
Johannes Berg | 3d23e34 | 2009-09-29 23:27:28 +0200 | [diff] [blame] | 1273 | #ifdef CONFIG_WEXT_CORE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1274 | if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { |
Al Viro | b1b0c24 | 2017-10-01 20:13:08 -0400 | [diff] [blame] | 1275 | err = wext_handle_ioctl(net, cmd, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1276 | } else |
Johannes Berg | 3d23e34 | 2009-09-29 23:27:28 +0200 | [diff] [blame] | 1277 | #endif |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1278 | switch (cmd) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1279 | case FIOSETOWN: |
| 1280 | case SIOCSPGRP: |
| 1281 | err = -EFAULT; |
| 1282 | if (get_user(pid, (int __user *)argp)) |
| 1283 | break; |
Jiri Slaby | 393cc3f | 2017-06-13 13:35:50 +0200 | [diff] [blame] | 1284 | err = f_setown(sock->file, pid, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1285 | break; |
| 1286 | case FIOGETOWN: |
| 1287 | case SIOCGPGRP: |
Eric W. Biederman | 609d7fa | 2006-10-02 02:17:15 -0700 | [diff] [blame] | 1288 | err = put_user(f_getown(sock->file), |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1289 | (int __user *)argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1290 | break; |
| 1291 | case SIOCGIFBR: |
| 1292 | case SIOCSIFBR: |
| 1293 | case SIOCBRADDBR: |
| 1294 | case SIOCBRDELBR: |
Arnd Bergmann | ad2f99a | 2021-07-27 15:45:16 +0200 | [diff] [blame] | 1295 | err = br_ioctl_call(net, NULL, cmd, NULL, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | break; |
| 1297 | case SIOCGIFVLAN: |
| 1298 | case SIOCSIFVLAN: |
| 1299 | err = -ENOPKG; |
| 1300 | if (!vlan_ioctl_hook) |
| 1301 | request_module("8021q"); |
| 1302 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1303 | mutex_lock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | if (vlan_ioctl_hook) |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1305 | err = vlan_ioctl_hook(net, argp); |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1306 | mutex_unlock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1307 | break; |
Andrey Vagin | c62cce2 | 2016-10-24 18:29:13 -0700 | [diff] [blame] | 1308 | case SIOCGSKNS: |
| 1309 | err = -EPERM; |
| 1310 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
| 1311 | break; |
| 1312 | |
| 1313 | err = open_related_ns(&net->ns, get_net_ns); |
| 1314 | break; |
Arnd Bergmann | 0768e17 | 2019-04-17 22:56:11 +0200 | [diff] [blame] | 1315 | case SIOCGSTAMP_OLD: |
| 1316 | case SIOCGSTAMPNS_OLD: |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1317 | if (!ops->gettstamp) { |
Arnd Bergmann | c7cbdbf | 2019-04-17 22:51:48 +0200 | [diff] [blame] | 1318 | err = -ENOIOCTLCMD; |
| 1319 | break; |
| 1320 | } |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1321 | err = ops->gettstamp(sock, argp, |
| 1322 | cmd == SIOCGSTAMP_OLD, |
| 1323 | !IS_ENABLED(CONFIG_64BIT)); |
Gustavo A. R. Silva | 6074782 | 2019-04-24 10:31:24 -0500 | [diff] [blame] | 1324 | break; |
Arnd Bergmann | 0768e17 | 2019-04-17 22:56:11 +0200 | [diff] [blame] | 1325 | case SIOCGSTAMP_NEW: |
| 1326 | case SIOCGSTAMPNS_NEW: |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1327 | if (!ops->gettstamp) { |
Arnd Bergmann | 0768e17 | 2019-04-17 22:56:11 +0200 | [diff] [blame] | 1328 | err = -ENOIOCTLCMD; |
| 1329 | break; |
| 1330 | } |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1331 | err = ops->gettstamp(sock, argp, |
| 1332 | cmd == SIOCGSTAMP_NEW, |
| 1333 | false); |
Arnd Bergmann | c7cbdbf | 2019-04-17 22:51:48 +0200 | [diff] [blame] | 1334 | break; |
Arnd Bergmann | 876f0bf | 2021-07-22 16:29:02 +0200 | [diff] [blame] | 1335 | |
| 1336 | case SIOCGIFCONF: |
| 1337 | err = dev_ifconf(net, argp); |
| 1338 | break; |
| 1339 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1340 | default: |
Johannes Berg | 63ff03a | 2019-01-25 22:43:17 +0100 | [diff] [blame] | 1341 | err = sock_do_ioctl(net, sock, cmd, arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1342 | break; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1343 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1344 | return err; |
| 1345 | } |
| 1346 | |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 1347 | /** |
| 1348 | * sock_create_lite - creates a socket |
| 1349 | * @family: protocol family (AF_INET, ...) |
| 1350 | * @type: communication type (SOCK_STREAM, ...) |
| 1351 | * @protocol: protocol (0, ...) |
| 1352 | * @res: new socket |
| 1353 | * |
| 1354 | * Creates a new socket and assigns it to @res, passing through LSM. |
| 1355 | * The new socket initialization is not complete, see kernel_accept(). |
| 1356 | * Returns 0 or an error. On failure @res is set to %NULL. |
| 1357 | * This function internally uses GFP_KERNEL. |
| 1358 | */ |
| 1359 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | int sock_create_lite(int family, int type, int protocol, struct socket **res) |
| 1361 | { |
| 1362 | int err; |
| 1363 | struct socket *sock = NULL; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1364 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1365 | err = security_socket_create(family, type, protocol, 1); |
| 1366 | if (err) |
| 1367 | goto out; |
| 1368 | |
| 1369 | sock = sock_alloc(); |
| 1370 | if (!sock) { |
| 1371 | err = -ENOMEM; |
| 1372 | goto out; |
| 1373 | } |
| 1374 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1375 | sock->type = type; |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 1376 | err = security_socket_post_create(sock, family, type, protocol, 1); |
| 1377 | if (err) |
| 1378 | goto out_release; |
| 1379 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1380 | out: |
| 1381 | *res = sock; |
| 1382 | return err; |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 1383 | out_release: |
| 1384 | sock_release(sock); |
| 1385 | sock = NULL; |
| 1386 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1387 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1388 | EXPORT_SYMBOL(sock_create_lite); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1389 | |
| 1390 | /* No kernel lock held - perfect */ |
Al Viro | ade994f | 2017-07-03 00:01:49 -0400 | [diff] [blame] | 1391 | static __poll_t sock_poll(struct file *file, poll_table *wait) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1392 | { |
Christoph Hellwig | 3cafb37 | 2018-01-09 16:07:34 +0100 | [diff] [blame] | 1393 | struct socket *sock = file->private_data; |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1394 | const struct proto_ops *ops = READ_ONCE(sock->ops); |
Christoph Hellwig | a331de3 | 2018-07-30 09:42:13 +0200 | [diff] [blame] | 1395 | __poll_t events = poll_requested_events(wait), flag = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1396 | |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1397 | if (!ops->poll) |
Christoph Hellwig | e88958e | 2018-06-29 15:37:24 +0200 | [diff] [blame] | 1398 | return 0; |
Christoph Hellwig | f641f13b | 2018-07-30 09:42:12 +0200 | [diff] [blame] | 1399 | |
Christoph Hellwig | a331de3 | 2018-07-30 09:42:13 +0200 | [diff] [blame] | 1400 | if (sk_can_busy_loop(sock->sk)) { |
| 1401 | /* poll once if requested by the syscall */ |
| 1402 | if (events & POLL_BUSY_LOOP) |
| 1403 | sk_busy_loop(sock->sk, 1); |
| 1404 | |
| 1405 | /* if this socket can poll_ll, tell the system call */ |
| 1406 | flag = POLL_BUSY_LOOP; |
| 1407 | } |
| 1408 | |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1409 | return ops->poll(file, sock, wait) | flag; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1410 | } |
| 1411 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1412 | static int sock_mmap(struct file *file, struct vm_area_struct *vma) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1413 | { |
Eric Dumazet | b69aee0 | 2005-09-06 14:42:45 -0700 | [diff] [blame] | 1414 | struct socket *sock = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1415 | |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1416 | return READ_ONCE(sock->ops)->mmap(file, sock, vma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1417 | } |
| 1418 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 1419 | static int sock_close(struct inode *inode, struct file *filp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1420 | { |
Cong Wang | 6d8c50d | 2018-06-07 13:39:49 -0700 | [diff] [blame] | 1421 | __sock_release(SOCKET_I(inode), inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1422 | return 0; |
| 1423 | } |
| 1424 | |
| 1425 | /* |
| 1426 | * Update the socket async list |
| 1427 | * |
| 1428 | * Fasync_list locking strategy. |
| 1429 | * |
| 1430 | * 1. fasync_list is modified only under process context socket lock |
| 1431 | * i.e. under semaphore. |
| 1432 | * 2. fasync_list is used under read_lock(&sk->sk_callback_lock) |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1433 | * or under socket lock |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1434 | */ |
| 1435 | |
| 1436 | static int sock_fasync(int fd, struct file *filp, int on) |
| 1437 | { |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1438 | struct socket *sock = filp->private_data; |
| 1439 | struct sock *sk = sock->sk; |
Al Viro | 333f790 | 2019-07-05 20:14:16 +0100 | [diff] [blame] | 1440 | struct socket_wq *wq = &sock->wq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1441 | |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1442 | if (sk == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1443 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1444 | |
| 1445 | lock_sock(sk); |
Eric Dumazet | eaefd110 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 1446 | fasync_helper(fd, filp, on, &wq->fasync_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1447 | |
Eric Dumazet | eaefd110 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 1448 | if (!wq->fasync_list) |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1449 | sock_reset_flag(sk, SOCK_FASYNC); |
Jonathan Corbet | 7639842 | 2009-02-01 14:26:59 -0700 | [diff] [blame] | 1450 | else |
Eric Dumazet | bcdce71 | 2009-10-06 17:28:29 -0700 | [diff] [blame] | 1451 | sock_set_flag(sk, SOCK_FASYNC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1452 | |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1453 | release_sock(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1454 | return 0; |
| 1455 | } |
| 1456 | |
Eric Dumazet | ceb5d58 | 2015-11-29 20:03:11 -0800 | [diff] [blame] | 1457 | /* This function may be called only under rcu_lock */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1458 | |
Eric Dumazet | ceb5d58 | 2015-11-29 20:03:11 -0800 | [diff] [blame] | 1459 | int sock_wake_async(struct socket_wq *wq, int how, int band) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1460 | { |
Eric Dumazet | ceb5d58 | 2015-11-29 20:03:11 -0800 | [diff] [blame] | 1461 | if (!wq || !wq->fasync_list) |
| 1462 | return -1; |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1463 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1464 | switch (how) { |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1465 | case SOCK_WAKE_WAITD: |
Eric Dumazet | ceb5d58 | 2015-11-29 20:03:11 -0800 | [diff] [blame] | 1466 | if (test_bit(SOCKWQ_ASYNC_WAITDATA, &wq->flags)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1467 | break; |
| 1468 | goto call_kill; |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1469 | case SOCK_WAKE_SPACE: |
Eric Dumazet | ceb5d58 | 2015-11-29 20:03:11 -0800 | [diff] [blame] | 1470 | if (!test_and_clear_bit(SOCKWQ_ASYNC_NOSPACE, &wq->flags)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1471 | break; |
Miaohe Lin | 7c7ab58 | 2020-08-08 16:23:10 +0800 | [diff] [blame] | 1472 | fallthrough; |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1473 | case SOCK_WAKE_IO: |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1474 | call_kill: |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1475 | kill_fasync(&wq->fasync_list, SIGIO, band); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1476 | break; |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1477 | case SOCK_WAKE_URG: |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1478 | kill_fasync(&wq->fasync_list, SIGURG, band); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1479 | } |
Eric Dumazet | ceb5d58 | 2015-11-29 20:03:11 -0800 | [diff] [blame] | 1480 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1481 | return 0; |
| 1482 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1483 | EXPORT_SYMBOL(sock_wake_async); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1484 | |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 1485 | /** |
| 1486 | * __sock_create - creates a socket |
| 1487 | * @net: net namespace |
| 1488 | * @family: protocol family (AF_INET, ...) |
| 1489 | * @type: communication type (SOCK_STREAM, ...) |
| 1490 | * @protocol: protocol (0, ...) |
| 1491 | * @res: new socket |
| 1492 | * @kern: boolean for kernel space sockets |
| 1493 | * |
| 1494 | * Creates a new socket and assigns it to @res, passing through LSM. |
| 1495 | * Returns 0 or an error. On failure @res is set to %NULL. @kern must |
| 1496 | * be set to true if the socket resides in kernel space. |
| 1497 | * This function internally uses GFP_KERNEL. |
| 1498 | */ |
| 1499 | |
Pavel Emelyanov | 721db93 | 2010-09-29 16:06:32 +0400 | [diff] [blame] | 1500 | int __sock_create(struct net *net, int family, int type, int protocol, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1501 | struct socket **res, int kern) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1502 | { |
| 1503 | int err; |
| 1504 | struct socket *sock; |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1505 | const struct net_proto_family *pf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1506 | |
| 1507 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1508 | * Check protocol is in range |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1509 | */ |
| 1510 | if (family < 0 || family >= NPROTO) |
| 1511 | return -EAFNOSUPPORT; |
| 1512 | if (type < 0 || type >= SOCK_MAX) |
| 1513 | return -EINVAL; |
| 1514 | |
| 1515 | /* Compatibility. |
| 1516 | |
| 1517 | This uglymoron is moved from INET layer to here to avoid |
| 1518 | deadlock in module load. |
| 1519 | */ |
| 1520 | if (family == PF_INET && type == SOCK_PACKET) { |
liping.zhang | f3c9869 | 2016-03-11 23:08:36 +0800 | [diff] [blame] | 1521 | pr_info_once("%s uses obsolete (PF_INET,SOCK_PACKET)\n", |
| 1522 | current->comm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1523 | family = PF_PACKET; |
| 1524 | } |
| 1525 | |
| 1526 | err = security_socket_create(family, type, protocol, kern); |
| 1527 | if (err) |
| 1528 | return err; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1529 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1530 | /* |
| 1531 | * Allocate the socket and allow the family to set things up. if |
| 1532 | * the protocol is 0, the family is instructed to select an appropriate |
| 1533 | * default. |
| 1534 | */ |
| 1535 | sock = sock_alloc(); |
| 1536 | if (!sock) { |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 1537 | net_warn_ratelimited("socket: no more sockets\n"); |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1538 | return -ENFILE; /* Not exactly a match, but its the |
| 1539 | closest posix thing */ |
| 1540 | } |
| 1541 | |
| 1542 | sock->type = type; |
| 1543 | |
Johannes Berg | 95a5afc | 2008-10-16 15:24:51 -0700 | [diff] [blame] | 1544 | #ifdef CONFIG_MODULES |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1545 | /* Attempt to load a protocol module if the find failed. |
| 1546 | * |
| 1547 | * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1548 | * requested real, full-featured networking support upon configuration. |
| 1549 | * Otherwise module support will break! |
| 1550 | */ |
Eric Dumazet | 190683a | 2010-11-10 10:50:44 +0000 | [diff] [blame] | 1551 | if (rcu_access_pointer(net_families[family]) == NULL) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1552 | request_module("net-pf-%d", family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1553 | #endif |
| 1554 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1555 | rcu_read_lock(); |
| 1556 | pf = rcu_dereference(net_families[family]); |
| 1557 | err = -EAFNOSUPPORT; |
| 1558 | if (!pf) |
| 1559 | goto out_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1560 | |
| 1561 | /* |
| 1562 | * We will call the ->create function, that possibly is in a loadable |
| 1563 | * module, so we have to bump that loadable module refcnt first. |
| 1564 | */ |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1565 | if (!try_module_get(pf->owner)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1566 | goto out_release; |
| 1567 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1568 | /* Now protected by module ref count */ |
| 1569 | rcu_read_unlock(); |
| 1570 | |
Eric Paris | 3f378b68 | 2009-11-05 22:18:14 -0800 | [diff] [blame] | 1571 | err = pf->create(net, sock, protocol, kern); |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1572 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1573 | goto out_module_put; |
Frank Filz | a79af59 | 2005-09-27 15:23:38 -0700 | [diff] [blame] | 1574 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1575 | /* |
| 1576 | * Now to bump the refcnt of the [loadable] module that owns this |
| 1577 | * socket at sock_release time we decrement its refcnt. |
| 1578 | */ |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1579 | if (!try_module_get(sock->ops->owner)) |
| 1580 | goto out_module_busy; |
| 1581 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1582 | /* |
| 1583 | * Now that we're done with the ->create function, the [loadable] |
| 1584 | * module can have its refcnt decremented |
| 1585 | */ |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1586 | module_put(pf->owner); |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 1587 | err = security_socket_post_create(sock, family, type, protocol, kern); |
| 1588 | if (err) |
Herbert Xu | 3b18552 | 2007-08-15 14:46:02 -0700 | [diff] [blame] | 1589 | goto out_sock_release; |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1590 | *res = sock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1591 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1592 | return 0; |
| 1593 | |
| 1594 | out_module_busy: |
| 1595 | err = -EAFNOSUPPORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1596 | out_module_put: |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1597 | sock->ops = NULL; |
| 1598 | module_put(pf->owner); |
| 1599 | out_sock_release: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1600 | sock_release(sock); |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1601 | return err; |
| 1602 | |
| 1603 | out_release: |
| 1604 | rcu_read_unlock(); |
| 1605 | goto out_sock_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1606 | } |
Pavel Emelyanov | 721db93 | 2010-09-29 16:06:32 +0400 | [diff] [blame] | 1607 | EXPORT_SYMBOL(__sock_create); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1608 | |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 1609 | /** |
| 1610 | * sock_create - creates a socket |
| 1611 | * @family: protocol family (AF_INET, ...) |
| 1612 | * @type: communication type (SOCK_STREAM, ...) |
| 1613 | * @protocol: protocol (0, ...) |
| 1614 | * @res: new socket |
| 1615 | * |
| 1616 | * A wrapper around __sock_create(). |
| 1617 | * Returns 0 or an error. This function internally uses GFP_KERNEL. |
| 1618 | */ |
| 1619 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1620 | int sock_create(int family, int type, int protocol, struct socket **res) |
| 1621 | { |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 1622 | return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1623 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1624 | EXPORT_SYMBOL(sock_create); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1625 | |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 1626 | /** |
| 1627 | * sock_create_kern - creates a socket (kernel space) |
| 1628 | * @net: net namespace |
| 1629 | * @family: protocol family (AF_INET, ...) |
| 1630 | * @type: communication type (SOCK_STREAM, ...) |
| 1631 | * @protocol: protocol (0, ...) |
| 1632 | * @res: new socket |
| 1633 | * |
| 1634 | * A wrapper around __sock_create(). |
| 1635 | * Returns 0 or an error. This function internally uses GFP_KERNEL. |
| 1636 | */ |
| 1637 | |
Eric W. Biederman | eeb1bd5 | 2015-05-08 21:08:05 -0500 | [diff] [blame] | 1638 | int sock_create_kern(struct net *net, int family, int type, int protocol, struct socket **res) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1639 | { |
Eric W. Biederman | eeb1bd5 | 2015-05-08 21:08:05 -0500 | [diff] [blame] | 1640 | return __sock_create(net, family, type, protocol, res, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1641 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1642 | EXPORT_SYMBOL(sock_create_kern); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1643 | |
Jens Axboe | da214a4 | 2022-04-12 14:22:39 -0600 | [diff] [blame] | 1644 | static struct socket *__sys_socket_create(int family, int type, int protocol) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1645 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1646 | struct socket *sock; |
Jens Axboe | da214a4 | 2022-04-12 14:22:39 -0600 | [diff] [blame] | 1647 | int retval; |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1648 | |
Ulrich Drepper | e38b36f | 2008-07-23 21:29:42 -0700 | [diff] [blame] | 1649 | /* Check the SOCK_* constants for consistency. */ |
| 1650 | BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC); |
| 1651 | BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK); |
| 1652 | BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK); |
| 1653 | BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK); |
| 1654 | |
Jens Axboe | da214a4 | 2022-04-12 14:22:39 -0600 | [diff] [blame] | 1655 | if ((type & ~SOCK_TYPE_MASK) & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
| 1656 | return ERR_PTR(-EINVAL); |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1657 | type &= SOCK_TYPE_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1658 | |
| 1659 | retval = sock_create(family, type, protocol, &sock); |
| 1660 | if (retval < 0) |
Jens Axboe | da214a4 | 2022-04-12 14:22:39 -0600 | [diff] [blame] | 1661 | return ERR_PTR(retval); |
| 1662 | |
| 1663 | return sock; |
| 1664 | } |
| 1665 | |
| 1666 | struct file *__sys_socket_file(int family, int type, int protocol) |
| 1667 | { |
| 1668 | struct socket *sock; |
Jens Axboe | da214a4 | 2022-04-12 14:22:39 -0600 | [diff] [blame] | 1669 | int flags; |
| 1670 | |
| 1671 | sock = __sys_socket_create(family, type, protocol); |
| 1672 | if (IS_ERR(sock)) |
| 1673 | return ERR_CAST(sock); |
| 1674 | |
| 1675 | flags = type & ~SOCK_TYPE_MASK; |
| 1676 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
| 1677 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
| 1678 | |
Thadeu Lima de Souza Cascardo | 649c15c | 2023-03-07 14:37:07 -0300 | [diff] [blame] | 1679 | return sock_alloc_file(sock, flags, NULL); |
Jens Axboe | da214a4 | 2022-04-12 14:22:39 -0600 | [diff] [blame] | 1680 | } |
| 1681 | |
Geliang Tang | 0dd061a | 2023-08-16 09:11:56 +0800 | [diff] [blame] | 1682 | /* A hook for bpf progs to attach to and update socket protocol. |
| 1683 | * |
| 1684 | * A static noinline declaration here could cause the compiler to |
| 1685 | * optimize away the function. A global noinline declaration will |
| 1686 | * keep the definition, but may optimize away the callsite. |
| 1687 | * Therefore, __weak is needed to ensure that the call is still |
| 1688 | * emitted, by telling the compiler that we don't know what the |
| 1689 | * function might eventually be. |
Geliang Tang | 0dd061a | 2023-08-16 09:11:56 +0800 | [diff] [blame] | 1690 | */ |
| 1691 | |
Dave Marchevsky | 15fb6f2b | 2023-10-31 14:56:25 -0700 | [diff] [blame] | 1692 | __bpf_hook_start(); |
Geliang Tang | 0dd061a | 2023-08-16 09:11:56 +0800 | [diff] [blame] | 1693 | |
| 1694 | __weak noinline int update_socket_protocol(int family, int type, int protocol) |
| 1695 | { |
| 1696 | return protocol; |
| 1697 | } |
| 1698 | |
Dave Marchevsky | 15fb6f2b | 2023-10-31 14:56:25 -0700 | [diff] [blame] | 1699 | __bpf_hook_end(); |
Geliang Tang | 0dd061a | 2023-08-16 09:11:56 +0800 | [diff] [blame] | 1700 | |
Jens Axboe | da214a4 | 2022-04-12 14:22:39 -0600 | [diff] [blame] | 1701 | int __sys_socket(int family, int type, int protocol) |
| 1702 | { |
| 1703 | struct socket *sock; |
| 1704 | int flags; |
| 1705 | |
Geliang Tang | 0dd061a | 2023-08-16 09:11:56 +0800 | [diff] [blame] | 1706 | sock = __sys_socket_create(family, type, |
| 1707 | update_socket_protocol(family, type, protocol)); |
Jens Axboe | da214a4 | 2022-04-12 14:22:39 -0600 | [diff] [blame] | 1708 | if (IS_ERR(sock)) |
| 1709 | return PTR_ERR(sock); |
| 1710 | |
| 1711 | flags = type & ~SOCK_TYPE_MASK; |
| 1712 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
| 1713 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1714 | |
Al Viro | 8e1611e | 2017-12-05 23:29:09 +0000 | [diff] [blame] | 1715 | return sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1716 | } |
| 1717 | |
Dominik Brodowski | 9d6a15c | 2018-03-13 19:29:43 +0100 | [diff] [blame] | 1718 | SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol) |
| 1719 | { |
| 1720 | return __sys_socket(family, type, protocol); |
| 1721 | } |
| 1722 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1723 | /* |
| 1724 | * Create a pair of connected sockets. |
| 1725 | */ |
| 1726 | |
Dominik Brodowski | 6debc8d | 2018-03-13 19:49:23 +0100 | [diff] [blame] | 1727 | int __sys_socketpair(int family, int type, int protocol, int __user *usockvec) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1728 | { |
| 1729 | struct socket *sock1, *sock2; |
| 1730 | int fd1, fd2, err; |
Al Viro | db34950 | 2007-02-07 01:48:00 -0500 | [diff] [blame] | 1731 | struct file *newfile1, *newfile2; |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1732 | int flags; |
| 1733 | |
| 1734 | flags = type & ~SOCK_TYPE_MASK; |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 1735 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1736 | return -EINVAL; |
| 1737 | type &= SOCK_TYPE_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1738 | |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1739 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
| 1740 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
| 1741 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1742 | /* |
Al Viro | 016a266 | 2017-12-05 23:28:38 +0000 | [diff] [blame] | 1743 | * reserve descriptors and make sure we won't fail |
| 1744 | * to return them to userland. |
| 1745 | */ |
| 1746 | fd1 = get_unused_fd_flags(flags); |
| 1747 | if (unlikely(fd1 < 0)) |
| 1748 | return fd1; |
| 1749 | |
| 1750 | fd2 = get_unused_fd_flags(flags); |
| 1751 | if (unlikely(fd2 < 0)) { |
| 1752 | put_unused_fd(fd1); |
| 1753 | return fd2; |
| 1754 | } |
| 1755 | |
| 1756 | err = put_user(fd1, &usockvec[0]); |
| 1757 | if (err) |
| 1758 | goto out; |
| 1759 | |
| 1760 | err = put_user(fd2, &usockvec[1]); |
| 1761 | if (err) |
| 1762 | goto out; |
| 1763 | |
| 1764 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1765 | * Obtain the first socket and check if the underlying protocol |
| 1766 | * supports the socketpair call. |
| 1767 | */ |
| 1768 | |
| 1769 | err = sock_create(family, type, protocol, &sock1); |
Al Viro | 016a266 | 2017-12-05 23:28:38 +0000 | [diff] [blame] | 1770 | if (unlikely(err < 0)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1771 | goto out; |
| 1772 | |
| 1773 | err = sock_create(family, type, protocol, &sock2); |
Al Viro | 016a266 | 2017-12-05 23:28:38 +0000 | [diff] [blame] | 1774 | if (unlikely(err < 0)) { |
| 1775 | sock_release(sock1); |
| 1776 | goto out; |
David S. Miller | bf3c23d | 2007-10-29 21:54:02 -0700 | [diff] [blame] | 1777 | } |
Yann Droneaud | d73aa28 | 2013-12-09 22:42:20 +0100 | [diff] [blame] | 1778 | |
David Herrmann | d47cd94 | 2018-05-04 16:28:20 +0200 | [diff] [blame] | 1779 | err = security_socket_socketpair(sock1, sock2); |
| 1780 | if (unlikely(err)) { |
| 1781 | sock_release(sock2); |
| 1782 | sock_release(sock1); |
| 1783 | goto out; |
| 1784 | } |
| 1785 | |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1786 | err = READ_ONCE(sock1->ops)->socketpair(sock1, sock2); |
Al Viro | 016a266 | 2017-12-05 23:28:38 +0000 | [diff] [blame] | 1787 | if (unlikely(err < 0)) { |
| 1788 | sock_release(sock2); |
| 1789 | sock_release(sock1); |
| 1790 | goto out; |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1791 | } |
| 1792 | |
Linus Torvalds | aab174f | 2012-10-02 20:25:04 -0700 | [diff] [blame] | 1793 | newfile1 = sock_alloc_file(sock1, flags, NULL); |
Viresh Kumar | b5ffe63 | 2015-08-12 15:59:47 +0530 | [diff] [blame] | 1794 | if (IS_ERR(newfile1)) { |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1795 | err = PTR_ERR(newfile1); |
Al Viro | 016a266 | 2017-12-05 23:28:38 +0000 | [diff] [blame] | 1796 | sock_release(sock2); |
| 1797 | goto out; |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1798 | } |
| 1799 | |
Linus Torvalds | aab174f | 2012-10-02 20:25:04 -0700 | [diff] [blame] | 1800 | newfile2 = sock_alloc_file(sock2, flags, NULL); |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1801 | if (IS_ERR(newfile2)) { |
| 1802 | err = PTR_ERR(newfile2); |
Al Viro | 016a266 | 2017-12-05 23:28:38 +0000 | [diff] [blame] | 1803 | fput(newfile1); |
| 1804 | goto out; |
Al Viro | db34950 | 2007-02-07 01:48:00 -0500 | [diff] [blame] | 1805 | } |
| 1806 | |
Al Viro | 157cf64 | 2008-12-14 04:57:47 -0500 | [diff] [blame] | 1807 | audit_fd_pair(fd1, fd2); |
Yann Droneaud | d73aa28 | 2013-12-09 22:42:20 +0100 | [diff] [blame] | 1808 | |
Al Viro | db34950 | 2007-02-07 01:48:00 -0500 | [diff] [blame] | 1809 | fd_install(fd1, newfile1); |
| 1810 | fd_install(fd2, newfile2); |
Yann Droneaud | d73aa28 | 2013-12-09 22:42:20 +0100 | [diff] [blame] | 1811 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1812 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1813 | out: |
Al Viro | 016a266 | 2017-12-05 23:28:38 +0000 | [diff] [blame] | 1814 | put_unused_fd(fd2); |
| 1815 | put_unused_fd(fd1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1816 | return err; |
| 1817 | } |
| 1818 | |
Dominik Brodowski | 6debc8d | 2018-03-13 19:49:23 +0100 | [diff] [blame] | 1819 | SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol, |
| 1820 | int __user *, usockvec) |
| 1821 | { |
| 1822 | return __sys_socketpair(family, type, protocol, usockvec); |
| 1823 | } |
| 1824 | |
Gabriel Krisman Bertazi | dc2e7797 | 2024-06-14 12:30:44 -0400 | [diff] [blame] | 1825 | int __sys_bind_socket(struct socket *sock, struct sockaddr_storage *address, |
| 1826 | int addrlen) |
| 1827 | { |
| 1828 | int err; |
| 1829 | |
| 1830 | err = security_socket_bind(sock, (struct sockaddr *)address, |
| 1831 | addrlen); |
| 1832 | if (!err) |
| 1833 | err = READ_ONCE(sock->ops)->bind(sock, |
| 1834 | (struct sockaddr *)address, |
| 1835 | addrlen); |
| 1836 | return err; |
| 1837 | } |
| 1838 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1839 | /* |
| 1840 | * Bind a name to a socket. Nothing much to do here since it's |
| 1841 | * the protocol's responsibility to handle the local address. |
| 1842 | * |
| 1843 | * We move the socket address to kernel space before we call |
| 1844 | * the protocol layer (having also checked the address is ok). |
| 1845 | */ |
| 1846 | |
Dominik Brodowski | a87d35d | 2018-03-13 19:33:09 +0100 | [diff] [blame] | 1847 | int __sys_bind(int fd, struct sockaddr __user *umyaddr, int addrlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1848 | { |
| 1849 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1850 | struct sockaddr_storage address; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1851 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1852 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1853 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 1854 | if (sock) { |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 1855 | err = move_addr_to_kernel(umyaddr, addrlen, &address); |
Gabriel Krisman Bertazi | dc2e7797 | 2024-06-14 12:30:44 -0400 | [diff] [blame] | 1856 | if (!err) |
| 1857 | err = __sys_bind_socket(sock, &address, addrlen); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1858 | fput_light(sock->file, fput_needed); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1859 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1860 | return err; |
| 1861 | } |
| 1862 | |
Dominik Brodowski | a87d35d | 2018-03-13 19:33:09 +0100 | [diff] [blame] | 1863 | SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen) |
| 1864 | { |
| 1865 | return __sys_bind(fd, umyaddr, addrlen); |
| 1866 | } |
| 1867 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1868 | /* |
| 1869 | * Perform a listen. Basically, we allow the protocol to do anything |
| 1870 | * necessary for a listen, and if that works, we mark the socket as |
| 1871 | * ready for listening. |
| 1872 | */ |
Gabriel Krisman Bertazi | bb6aaf7 | 2024-06-14 12:30:45 -0400 | [diff] [blame] | 1873 | int __sys_listen_socket(struct socket *sock, int backlog) |
| 1874 | { |
| 1875 | int somaxconn, err; |
| 1876 | |
| 1877 | somaxconn = READ_ONCE(sock_net(sock->sk)->core.sysctl_somaxconn); |
| 1878 | if ((unsigned int)backlog > somaxconn) |
| 1879 | backlog = somaxconn; |
| 1880 | |
| 1881 | err = security_socket_listen(sock, backlog); |
| 1882 | if (!err) |
| 1883 | err = READ_ONCE(sock->ops)->listen(sock, backlog); |
| 1884 | return err; |
| 1885 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1886 | |
Dominik Brodowski | 25e290e | 2018-03-13 19:36:54 +0100 | [diff] [blame] | 1887 | int __sys_listen(int fd, int backlog) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1888 | { |
| 1889 | struct socket *sock; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1890 | int err, fput_needed; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1891 | |
| 1892 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1893 | if (sock) { |
Gabriel Krisman Bertazi | bb6aaf7 | 2024-06-14 12:30:45 -0400 | [diff] [blame] | 1894 | err = __sys_listen_socket(sock, backlog); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1895 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1896 | } |
| 1897 | return err; |
| 1898 | } |
| 1899 | |
Dominik Brodowski | 25e290e | 2018-03-13 19:36:54 +0100 | [diff] [blame] | 1900 | SYSCALL_DEFINE2(listen, int, fd, int, backlog) |
| 1901 | { |
| 1902 | return __sys_listen(fd, backlog); |
| 1903 | } |
| 1904 | |
Jens Axboe | 0645fbe | 2024-05-09 09:31:05 -0600 | [diff] [blame] | 1905 | struct file *do_accept(struct file *file, struct proto_accept_arg *arg, |
Jens Axboe | de2ea4b | 2019-10-17 14:41:29 -0600 | [diff] [blame] | 1906 | struct sockaddr __user *upeer_sockaddr, |
Pavel Begunkov | d32f89d | 2021-08-25 12:25:44 +0100 | [diff] [blame] | 1907 | int __user *upeer_addrlen, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1908 | { |
| 1909 | struct socket *sock, *newsock; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1910 | struct file *newfile; |
Pavel Begunkov | d32f89d | 2021-08-25 12:25:44 +0100 | [diff] [blame] | 1911 | int err, len; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1912 | struct sockaddr_storage address; |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1913 | const struct proto_ops *ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1914 | |
Florent Revest | dba4a92 | 2020-12-04 12:36:04 +0100 | [diff] [blame] | 1915 | sock = sock_from_file(file); |
Pavel Begunkov | d32f89d | 2021-08-25 12:25:44 +0100 | [diff] [blame] | 1916 | if (!sock) |
| 1917 | return ERR_PTR(-ENOTSOCK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1918 | |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1919 | newsock = sock_alloc(); |
| 1920 | if (!newsock) |
Pavel Begunkov | d32f89d | 2021-08-25 12:25:44 +0100 | [diff] [blame] | 1921 | return ERR_PTR(-ENFILE); |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1922 | ops = READ_ONCE(sock->ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1923 | |
| 1924 | newsock->type = sock->type; |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1925 | newsock->ops = ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1926 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1927 | /* |
| 1928 | * We don't need try_module_get here, as the listening socket (sock) |
| 1929 | * has the protocol module (sock->ops->owner) held. |
| 1930 | */ |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1931 | __module_get(ops->owner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1932 | |
Linus Torvalds | aab174f | 2012-10-02 20:25:04 -0700 | [diff] [blame] | 1933 | newfile = sock_alloc_file(newsock, flags, sock->sk->sk_prot_creator->name); |
Pavel Begunkov | d32f89d | 2021-08-25 12:25:44 +0100 | [diff] [blame] | 1934 | if (IS_ERR(newfile)) |
| 1935 | return newfile; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1936 | |
Frank Filz | a79af59 | 2005-09-27 15:23:38 -0700 | [diff] [blame] | 1937 | err = security_socket_accept(sock, newsock); |
| 1938 | if (err) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1939 | goto out_fd; |
Frank Filz | a79af59 | 2005-09-27 15:23:38 -0700 | [diff] [blame] | 1940 | |
Jens Axboe | 0645fbe | 2024-05-09 09:31:05 -0600 | [diff] [blame] | 1941 | arg->flags |= sock->file->f_flags; |
| 1942 | err = ops->accept(sock, newsock, arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1943 | if (err < 0) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1944 | goto out_fd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1945 | |
| 1946 | if (upeer_sockaddr) { |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1947 | len = ops->getname(newsock, (struct sockaddr *)&address, 2); |
Denys Vlasenko | 9b2c45d | 2018-02-12 20:00:20 +0100 | [diff] [blame] | 1948 | if (len < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1949 | err = -ECONNABORTED; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1950 | goto out_fd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1951 | } |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 1952 | err = move_addr_to_user(&address, |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1953 | len, upeer_sockaddr, upeer_addrlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1954 | if (err < 0) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1955 | goto out_fd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1956 | } |
| 1957 | |
| 1958 | /* File flags are not inherited via accept() unlike another OSes. */ |
Pavel Begunkov | d32f89d | 2021-08-25 12:25:44 +0100 | [diff] [blame] | 1959 | return newfile; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1960 | out_fd: |
David S. Miller | 9606a21 | 2006-04-01 01:00:14 -0800 | [diff] [blame] | 1961 | fput(newfile); |
Pavel Begunkov | d32f89d | 2021-08-25 12:25:44 +0100 | [diff] [blame] | 1962 | return ERR_PTR(err); |
| 1963 | } |
Jens Axboe | de2ea4b | 2019-10-17 14:41:29 -0600 | [diff] [blame] | 1964 | |
Yajun Deng | c042453 | 2022-06-10 17:10:17 +0800 | [diff] [blame] | 1965 | static int __sys_accept4_file(struct file *file, struct sockaddr __user *upeer_sockaddr, |
| 1966 | int __user *upeer_addrlen, int flags) |
Pavel Begunkov | d32f89d | 2021-08-25 12:25:44 +0100 | [diff] [blame] | 1967 | { |
Jens Axboe | 0645fbe | 2024-05-09 09:31:05 -0600 | [diff] [blame] | 1968 | struct proto_accept_arg arg = { }; |
Pavel Begunkov | d32f89d | 2021-08-25 12:25:44 +0100 | [diff] [blame] | 1969 | struct file *newfile; |
| 1970 | int newfd; |
| 1971 | |
| 1972 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
| 1973 | return -EINVAL; |
| 1974 | |
| 1975 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
| 1976 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
| 1977 | |
Yajun Deng | c042453 | 2022-06-10 17:10:17 +0800 | [diff] [blame] | 1978 | newfd = get_unused_fd_flags(flags); |
Pavel Begunkov | d32f89d | 2021-08-25 12:25:44 +0100 | [diff] [blame] | 1979 | if (unlikely(newfd < 0)) |
| 1980 | return newfd; |
| 1981 | |
Jens Axboe | 0645fbe | 2024-05-09 09:31:05 -0600 | [diff] [blame] | 1982 | newfile = do_accept(file, &arg, upeer_sockaddr, upeer_addrlen, |
Pavel Begunkov | d32f89d | 2021-08-25 12:25:44 +0100 | [diff] [blame] | 1983 | flags); |
| 1984 | if (IS_ERR(newfile)) { |
| 1985 | put_unused_fd(newfd); |
| 1986 | return PTR_ERR(newfile); |
| 1987 | } |
| 1988 | fd_install(newfd, newfile); |
| 1989 | return newfd; |
Jens Axboe | de2ea4b | 2019-10-17 14:41:29 -0600 | [diff] [blame] | 1990 | } |
| 1991 | |
| 1992 | /* |
| 1993 | * For accept, we attempt to create a new socket, set up the link |
| 1994 | * with the client, wake up the client, then return the new |
| 1995 | * connected fd. We collect the address of the connector in kernel |
| 1996 | * space and move it to user at the very end. This is unclean because |
| 1997 | * we open the socket then return an error. |
| 1998 | * |
| 1999 | * 1003.1g adds the ability to recvmsg() to query connection pending |
| 2000 | * status to recvmsg. We need to add that support in a way thats |
| 2001 | * clean when we restructure accept also. |
| 2002 | */ |
| 2003 | |
| 2004 | int __sys_accept4(int fd, struct sockaddr __user *upeer_sockaddr, |
| 2005 | int __user *upeer_addrlen, int flags) |
| 2006 | { |
| 2007 | int ret = -EBADF; |
| 2008 | struct fd f; |
| 2009 | |
| 2010 | f = fdget(fd); |
| 2011 | if (f.file) { |
Yajun Deng | c042453 | 2022-06-10 17:10:17 +0800 | [diff] [blame] | 2012 | ret = __sys_accept4_file(f.file, upeer_sockaddr, |
| 2013 | upeer_addrlen, flags); |
Miaohe Lin | 6b07ede | 2020-08-06 19:52:24 +0800 | [diff] [blame] | 2014 | fdput(f); |
Jens Axboe | de2ea4b | 2019-10-17 14:41:29 -0600 | [diff] [blame] | 2015 | } |
| 2016 | |
| 2017 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2018 | } |
| 2019 | |
Dominik Brodowski | 4541e80 | 2018-03-13 19:24:23 +0100 | [diff] [blame] | 2020 | SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, |
| 2021 | int __user *, upeer_addrlen, int, flags) |
| 2022 | { |
| 2023 | return __sys_accept4(fd, upeer_sockaddr, upeer_addrlen, flags); |
| 2024 | } |
| 2025 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 2026 | SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, |
| 2027 | int __user *, upeer_addrlen) |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 2028 | { |
Dominik Brodowski | 4541e80 | 2018-03-13 19:24:23 +0100 | [diff] [blame] | 2029 | return __sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 2030 | } |
| 2031 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2032 | /* |
| 2033 | * Attempt to connect to a socket with the server address. The address |
| 2034 | * is in user space so we verify it is OK and move it to kernel space. |
| 2035 | * |
| 2036 | * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to |
| 2037 | * break bindings |
| 2038 | * |
| 2039 | * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and |
| 2040 | * other SEQPACKET protocols that take time to connect() as it doesn't |
| 2041 | * include the -EINPROGRESS status for such sockets. |
| 2042 | */ |
| 2043 | |
Jens Axboe | f499a02 | 2019-12-02 16:28:46 -0700 | [diff] [blame] | 2044 | int __sys_connect_file(struct file *file, struct sockaddr_storage *address, |
Jens Axboe | bd3ded3 | 2019-11-23 14:17:16 -0700 | [diff] [blame] | 2045 | int addrlen, int file_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2046 | { |
| 2047 | struct socket *sock; |
Jens Axboe | bd3ded3 | 2019-11-23 14:17:16 -0700 | [diff] [blame] | 2048 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2049 | |
Florent Revest | dba4a92 | 2020-12-04 12:36:04 +0100 | [diff] [blame] | 2050 | sock = sock_from_file(file); |
| 2051 | if (!sock) { |
| 2052 | err = -ENOTSOCK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2053 | goto out; |
Florent Revest | dba4a92 | 2020-12-04 12:36:04 +0100 | [diff] [blame] | 2054 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2055 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2056 | err = |
Jens Axboe | f499a02 | 2019-12-02 16:28:46 -0700 | [diff] [blame] | 2057 | security_socket_connect(sock, (struct sockaddr *)address, addrlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2058 | if (err) |
Jens Axboe | bd3ded3 | 2019-11-23 14:17:16 -0700 | [diff] [blame] | 2059 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2060 | |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 2061 | err = READ_ONCE(sock->ops)->connect(sock, (struct sockaddr *)address, |
| 2062 | addrlen, sock->file->f_flags | file_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2063 | out: |
| 2064 | return err; |
| 2065 | } |
| 2066 | |
Jens Axboe | bd3ded3 | 2019-11-23 14:17:16 -0700 | [diff] [blame] | 2067 | int __sys_connect(int fd, struct sockaddr __user *uservaddr, int addrlen) |
| 2068 | { |
| 2069 | int ret = -EBADF; |
| 2070 | struct fd f; |
| 2071 | |
| 2072 | f = fdget(fd); |
| 2073 | if (f.file) { |
Jens Axboe | f499a02 | 2019-12-02 16:28:46 -0700 | [diff] [blame] | 2074 | struct sockaddr_storage address; |
| 2075 | |
| 2076 | ret = move_addr_to_kernel(uservaddr, addrlen, &address); |
| 2077 | if (!ret) |
| 2078 | ret = __sys_connect_file(f.file, &address, addrlen, 0); |
Miaohe Lin | 6b07ede | 2020-08-06 19:52:24 +0800 | [diff] [blame] | 2079 | fdput(f); |
Jens Axboe | bd3ded3 | 2019-11-23 14:17:16 -0700 | [diff] [blame] | 2080 | } |
| 2081 | |
| 2082 | return ret; |
| 2083 | } |
| 2084 | |
Dominik Brodowski | 1387c2c | 2018-03-13 19:35:09 +0100 | [diff] [blame] | 2085 | SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, |
| 2086 | int, addrlen) |
| 2087 | { |
| 2088 | return __sys_connect(fd, uservaddr, addrlen); |
| 2089 | } |
| 2090 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2091 | /* |
| 2092 | * Get the local address ('name') of a socket object. Move the obtained |
| 2093 | * name to user space. |
| 2094 | */ |
| 2095 | |
Dominik Brodowski | 8882a10 | 2018-03-13 19:43:14 +0100 | [diff] [blame] | 2096 | int __sys_getsockname(int fd, struct sockaddr __user *usockaddr, |
| 2097 | int __user *usockaddr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2098 | { |
| 2099 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 2100 | struct sockaddr_storage address; |
Denys Vlasenko | 9b2c45d | 2018-02-12 20:00:20 +0100 | [diff] [blame] | 2101 | int err, fput_needed; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2102 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2103 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2104 | if (!sock) |
| 2105 | goto out; |
| 2106 | |
| 2107 | err = security_socket_getsockname(sock); |
| 2108 | if (err) |
| 2109 | goto out_put; |
| 2110 | |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 2111 | err = READ_ONCE(sock->ops)->getname(sock, (struct sockaddr *)&address, 0); |
Denys Vlasenko | 9b2c45d | 2018-02-12 20:00:20 +0100 | [diff] [blame] | 2112 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2113 | goto out_put; |
Hamish MacDonald | e44ef1d | 2022-01-01 22:38:25 +1000 | [diff] [blame] | 2114 | /* "err" is actually length in this case */ |
Denys Vlasenko | 9b2c45d | 2018-02-12 20:00:20 +0100 | [diff] [blame] | 2115 | err = move_addr_to_user(&address, err, usockaddr, usockaddr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2116 | |
| 2117 | out_put: |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2118 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2119 | out: |
| 2120 | return err; |
| 2121 | } |
| 2122 | |
Dominik Brodowski | 8882a10 | 2018-03-13 19:43:14 +0100 | [diff] [blame] | 2123 | SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, |
| 2124 | int __user *, usockaddr_len) |
| 2125 | { |
| 2126 | return __sys_getsockname(fd, usockaddr, usockaddr_len); |
| 2127 | } |
| 2128 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2129 | /* |
| 2130 | * Get the remote address ('name') of a socket object. Move the obtained |
| 2131 | * name to user space. |
| 2132 | */ |
| 2133 | |
Dominik Brodowski | b21c8f8 | 2018-03-13 19:47:00 +0100 | [diff] [blame] | 2134 | int __sys_getpeername(int fd, struct sockaddr __user *usockaddr, |
| 2135 | int __user *usockaddr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2136 | { |
| 2137 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 2138 | struct sockaddr_storage address; |
Denys Vlasenko | 9b2c45d | 2018-02-12 20:00:20 +0100 | [diff] [blame] | 2139 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2140 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2141 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 2142 | if (sock != NULL) { |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 2143 | const struct proto_ops *ops = READ_ONCE(sock->ops); |
| 2144 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2145 | err = security_socket_getpeername(sock); |
| 2146 | if (err) { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2147 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2148 | return err; |
| 2149 | } |
| 2150 | |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 2151 | err = ops->getname(sock, (struct sockaddr *)&address, 1); |
Denys Vlasenko | 9b2c45d | 2018-02-12 20:00:20 +0100 | [diff] [blame] | 2152 | if (err >= 0) |
| 2153 | /* "err" is actually length in this case */ |
| 2154 | err = move_addr_to_user(&address, err, usockaddr, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2155 | usockaddr_len); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2156 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2157 | } |
| 2158 | return err; |
| 2159 | } |
| 2160 | |
Dominik Brodowski | b21c8f8 | 2018-03-13 19:47:00 +0100 | [diff] [blame] | 2161 | SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, |
| 2162 | int __user *, usockaddr_len) |
| 2163 | { |
| 2164 | return __sys_getpeername(fd, usockaddr, usockaddr_len); |
| 2165 | } |
| 2166 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2167 | /* |
| 2168 | * Send a datagram to a given address. We move the address into kernel |
| 2169 | * space and check the user space data area is readable before invoking |
| 2170 | * the protocol. |
| 2171 | */ |
Dominik Brodowski | 211b634 | 2018-03-13 19:18:52 +0100 | [diff] [blame] | 2172 | int __sys_sendto(int fd, void __user *buff, size_t len, unsigned int flags, |
| 2173 | struct sockaddr __user *addr, int addr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2174 | { |
| 2175 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 2176 | struct sockaddr_storage address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2177 | int err; |
| 2178 | struct msghdr msg; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2179 | int fput_needed; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2180 | |
Jens Axboe | 9fd7874 | 2023-12-04 10:47:50 -0700 | [diff] [blame] | 2181 | err = import_ubuf(ITER_SOURCE, buff, len, &msg.msg_iter); |
Al Viro | 602bd0e | 2015-03-21 19:12:32 -0400 | [diff] [blame] | 2182 | if (unlikely(err)) |
| 2183 | return err; |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 2184 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 2185 | if (!sock) |
David S. Miller | 4387ff75 | 2007-02-08 15:06:08 -0800 | [diff] [blame] | 2186 | goto out; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2187 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2188 | msg.msg_name = NULL; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2189 | msg.msg_control = NULL; |
| 2190 | msg.msg_controllen = 0; |
| 2191 | msg.msg_namelen = 0; |
Pavel Begunkov | 7c701d9 | 2022-07-12 21:52:29 +0100 | [diff] [blame] | 2192 | msg.msg_ubuf = NULL; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2193 | if (addr) { |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 2194 | err = move_addr_to_kernel(addr, addr_len, &address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2195 | if (err < 0) |
| 2196 | goto out_put; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 2197 | msg.msg_name = (struct sockaddr *)&address; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2198 | msg.msg_namelen = addr_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2199 | } |
David Howells | b841b90 | 2023-05-22 13:11:10 +0100 | [diff] [blame] | 2200 | flags &= ~MSG_INTERNAL_SENDMSG_FLAGS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2201 | if (sock->file->f_flags & O_NONBLOCK) |
| 2202 | flags |= MSG_DONTWAIT; |
| 2203 | msg.msg_flags = flags; |
Jordan Rife | 86a7e0b | 2023-09-21 18:46:41 -0500 | [diff] [blame] | 2204 | err = __sock_sendmsg(sock, &msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2205 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2206 | out_put: |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 2207 | fput_light(sock->file, fput_needed); |
David S. Miller | 4387ff75 | 2007-02-08 15:06:08 -0800 | [diff] [blame] | 2208 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2209 | return err; |
| 2210 | } |
| 2211 | |
Dominik Brodowski | 211b634 | 2018-03-13 19:18:52 +0100 | [diff] [blame] | 2212 | SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, |
| 2213 | unsigned int, flags, struct sockaddr __user *, addr, |
| 2214 | int, addr_len) |
| 2215 | { |
| 2216 | return __sys_sendto(fd, buff, len, flags, addr, addr_len); |
| 2217 | } |
| 2218 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2219 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2220 | * Send a datagram down a socket. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2221 | */ |
| 2222 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 2223 | SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len, |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 2224 | unsigned int, flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2225 | { |
Dominik Brodowski | 211b634 | 2018-03-13 19:18:52 +0100 | [diff] [blame] | 2226 | return __sys_sendto(fd, buff, len, flags, NULL, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2227 | } |
| 2228 | |
| 2229 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2230 | * Receive a frame from the socket and optionally record the address of the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2231 | * sender. We verify the buffers are writable and if needed move the |
| 2232 | * sender address from kernel to user space. |
| 2233 | */ |
Dominik Brodowski | 7a09e1e | 2018-03-13 19:10:06 +0100 | [diff] [blame] | 2234 | int __sys_recvfrom(int fd, void __user *ubuf, size_t size, unsigned int flags, |
| 2235 | struct sockaddr __user *addr, int __user *addr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2236 | { |
Eric Dumazet | 1228b34 | 2022-06-22 15:02:20 +0000 | [diff] [blame] | 2237 | struct sockaddr_storage address; |
| 2238 | struct msghdr msg = { |
| 2239 | /* Save some cycles and don't copy the address if not needed */ |
| 2240 | .msg_name = addr ? (struct sockaddr *)&address : NULL, |
| 2241 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2242 | struct socket *sock; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2243 | int err, err2; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2244 | int fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2245 | |
Jens Axboe | 9fd7874 | 2023-12-04 10:47:50 -0700 | [diff] [blame] | 2246 | err = import_ubuf(ITER_DEST, ubuf, size, &msg.msg_iter); |
Al Viro | 602bd0e | 2015-03-21 19:12:32 -0400 | [diff] [blame] | 2247 | if (unlikely(err)) |
| 2248 | return err; |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 2249 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2250 | if (!sock) |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 2251 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2252 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2253 | if (sock->file->f_flags & O_NONBLOCK) |
| 2254 | flags |= MSG_DONTWAIT; |
Al Viro | 2da6290 | 2015-03-14 21:13:46 -0400 | [diff] [blame] | 2255 | err = sock_recvmsg(sock, &msg, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2256 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2257 | if (err >= 0 && addr != NULL) { |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 2258 | err2 = move_addr_to_user(&address, |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 2259 | msg.msg_namelen, addr, addr_len); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2260 | if (err2 < 0) |
| 2261 | err = err2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2262 | } |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 2263 | |
| 2264 | fput_light(sock->file, fput_needed); |
David S. Miller | 4387ff75 | 2007-02-08 15:06:08 -0800 | [diff] [blame] | 2265 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2266 | return err; |
| 2267 | } |
| 2268 | |
Dominik Brodowski | 7a09e1e | 2018-03-13 19:10:06 +0100 | [diff] [blame] | 2269 | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, |
| 2270 | unsigned int, flags, struct sockaddr __user *, addr, |
| 2271 | int __user *, addr_len) |
| 2272 | { |
| 2273 | return __sys_recvfrom(fd, ubuf, size, flags, addr, addr_len); |
| 2274 | } |
| 2275 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2276 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2277 | * Receive a datagram from a socket. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2278 | */ |
| 2279 | |
Jan Glauber | b7c0ddf | 2014-04-16 09:32:48 +0200 | [diff] [blame] | 2280 | SYSCALL_DEFINE4(recv, int, fd, void __user *, ubuf, size_t, size, |
| 2281 | unsigned int, flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2282 | { |
Dominik Brodowski | 7a09e1e | 2018-03-13 19:10:06 +0100 | [diff] [blame] | 2283 | return __sys_recvfrom(fd, ubuf, size, flags, NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2284 | } |
| 2285 | |
Florian Westphal | 83f0c10 | 2020-07-05 01:30:15 +0200 | [diff] [blame] | 2286 | static bool sock_use_custom_sol_socket(const struct socket *sock) |
| 2287 | { |
Paolo Abeni | a5ef058 | 2022-10-20 19:48:51 +0200 | [diff] [blame] | 2288 | return test_bit(SOCK_CUSTOM_SOCKOPT, &sock->flags); |
Florian Westphal | 83f0c10 | 2020-07-05 01:30:15 +0200 | [diff] [blame] | 2289 | } |
| 2290 | |
Breno Leitao | 1406245 | 2023-10-16 06:47:41 -0700 | [diff] [blame] | 2291 | int do_sock_setsockopt(struct socket *sock, bool compat, int level, |
| 2292 | int optname, sockptr_t optval, int optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2293 | { |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 2294 | const struct proto_ops *ops; |
Stanislav Fomichev | 0d01da6 | 2019-06-27 13:38:47 -0700 | [diff] [blame] | 2295 | char *kernel_optval = NULL; |
Breno Leitao | 1406245 | 2023-10-16 06:47:41 -0700 | [diff] [blame] | 2296 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2297 | |
| 2298 | if (optlen < 0) |
| 2299 | return -EINVAL; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2300 | |
Christoph Hellwig | 4a36729 | 2020-07-17 08:23:11 +0200 | [diff] [blame] | 2301 | err = security_socket_setsockopt(sock, level, optname); |
| 2302 | if (err) |
| 2303 | goto out_put; |
Stanislav Fomichev | 0d01da6 | 2019-06-27 13:38:47 -0700 | [diff] [blame] | 2304 | |
Breno Leitao | 1406245 | 2023-10-16 06:47:41 -0700 | [diff] [blame] | 2305 | if (!compat) |
Christoph Hellwig | 55db9c0 | 2020-07-17 08:23:15 +0200 | [diff] [blame] | 2306 | err = BPF_CGROUP_RUN_PROG_SETSOCKOPT(sock->sk, &level, &optname, |
Breno Leitao | 3f31e0d | 2023-10-16 06:47:40 -0700 | [diff] [blame] | 2307 | optval, &optlen, |
Christoph Hellwig | 55db9c0 | 2020-07-17 08:23:15 +0200 | [diff] [blame] | 2308 | &kernel_optval); |
Christoph Hellwig | 4a36729 | 2020-07-17 08:23:11 +0200 | [diff] [blame] | 2309 | if (err < 0) |
| 2310 | goto out_put; |
| 2311 | if (err > 0) { |
| 2312 | err = 0; |
| 2313 | goto out_put; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2314 | } |
Christoph Hellwig | 4a36729 | 2020-07-17 08:23:11 +0200 | [diff] [blame] | 2315 | |
Christoph Hellwig | a7b75c5 | 2020-07-23 08:09:07 +0200 | [diff] [blame] | 2316 | if (kernel_optval) |
| 2317 | optval = KERNEL_SOCKPTR(kernel_optval); |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 2318 | ops = READ_ONCE(sock->ops); |
Christoph Hellwig | 4a36729 | 2020-07-17 08:23:11 +0200 | [diff] [blame] | 2319 | if (level == SOL_SOCKET && !sock_use_custom_sol_socket(sock)) |
Christoph Hellwig | a7b75c5 | 2020-07-23 08:09:07 +0200 | [diff] [blame] | 2320 | err = sock_setsockopt(sock, level, optname, optval, optlen); |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 2321 | else if (unlikely(!ops->setsockopt)) |
Christoph Hellwig | a44d9e7 | 2020-07-17 08:23:31 +0200 | [diff] [blame] | 2322 | err = -EOPNOTSUPP; |
Christoph Hellwig | 4a36729 | 2020-07-17 08:23:11 +0200 | [diff] [blame] | 2323 | else |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 2324 | err = ops->setsockopt(sock, level, optname, optval, |
Christoph Hellwig | 4a36729 | 2020-07-17 08:23:11 +0200 | [diff] [blame] | 2325 | optlen); |
Christoph Hellwig | a7b75c5 | 2020-07-23 08:09:07 +0200 | [diff] [blame] | 2326 | kfree(kernel_optval); |
Christoph Hellwig | 4a36729 | 2020-07-17 08:23:11 +0200 | [diff] [blame] | 2327 | out_put: |
Breno Leitao | 1406245 | 2023-10-16 06:47:41 -0700 | [diff] [blame] | 2328 | return err; |
| 2329 | } |
| 2330 | EXPORT_SYMBOL(do_sock_setsockopt); |
| 2331 | |
| 2332 | /* Set a socket option. Because we don't know the option lengths we have |
| 2333 | * to pass the user mode parameter for the protocols to sort out. |
| 2334 | */ |
| 2335 | int __sys_setsockopt(int fd, int level, int optname, char __user *user_optval, |
| 2336 | int optlen) |
| 2337 | { |
| 2338 | sockptr_t optval = USER_SOCKPTR(user_optval); |
| 2339 | bool compat = in_compat_syscall(); |
| 2340 | int err, fput_needed; |
| 2341 | struct socket *sock; |
| 2342 | |
| 2343 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 2344 | if (!sock) |
| 2345 | return err; |
| 2346 | |
| 2347 | err = do_sock_setsockopt(sock, compat, level, optname, optval, optlen); |
| 2348 | |
Christoph Hellwig | 4a36729 | 2020-07-17 08:23:11 +0200 | [diff] [blame] | 2349 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2350 | return err; |
| 2351 | } |
| 2352 | |
Dominik Brodowski | cc36dca | 2018-03-13 20:10:59 +0100 | [diff] [blame] | 2353 | SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, |
| 2354 | char __user *, optval, int, optlen) |
| 2355 | { |
| 2356 | return __sys_setsockopt(fd, level, optname, optval, optlen); |
| 2357 | } |
| 2358 | |
Stanislav Fomichev | 9cacf81 | 2021-01-15 08:34:59 -0800 | [diff] [blame] | 2359 | INDIRECT_CALLABLE_DECLARE(bool tcp_bpf_bypass_getsockopt(int level, |
| 2360 | int optname)); |
| 2361 | |
Breno Leitao | 0b05b0c | 2023-10-16 06:47:42 -0700 | [diff] [blame] | 2362 | int do_sock_getsockopt(struct socket *sock, bool compat, int level, |
| 2363 | int optname, sockptr_t optval, sockptr_t optlen) |
| 2364 | { |
| 2365 | int max_optlen __maybe_unused; |
| 2366 | const struct proto_ops *ops; |
| 2367 | int err; |
| 2368 | |
| 2369 | err = security_socket_getsockopt(sock, level, optname); |
| 2370 | if (err) |
| 2371 | return err; |
| 2372 | |
| 2373 | if (!compat) |
| 2374 | max_optlen = BPF_CGROUP_GETSOCKOPT_MAX_OPTLEN(optlen); |
| 2375 | |
| 2376 | ops = READ_ONCE(sock->ops); |
| 2377 | if (level == SOL_SOCKET) { |
| 2378 | err = sk_getsockopt(sock->sk, level, optname, optval, optlen); |
| 2379 | } else if (unlikely(!ops->getsockopt)) { |
| 2380 | err = -EOPNOTSUPP; |
| 2381 | } else { |
| 2382 | if (WARN_ONCE(optval.is_kernel || optlen.is_kernel, |
| 2383 | "Invalid argument type")) |
| 2384 | return -EOPNOTSUPP; |
| 2385 | |
| 2386 | err = ops->getsockopt(sock, level, optname, optval.user, |
| 2387 | optlen.user); |
| 2388 | } |
| 2389 | |
| 2390 | if (!compat) |
| 2391 | err = BPF_CGROUP_RUN_PROG_GETSOCKOPT(sock->sk, level, optname, |
| 2392 | optval, optlen, max_optlen, |
| 2393 | err); |
| 2394 | |
| 2395 | return err; |
| 2396 | } |
| 2397 | EXPORT_SYMBOL(do_sock_getsockopt); |
| 2398 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2399 | /* |
| 2400 | * Get a socket option. Because we don't know the option lengths we have |
| 2401 | * to pass a user mode parameter for the protocols to sort out. |
| 2402 | */ |
Christoph Hellwig | 55db9c0 | 2020-07-17 08:23:15 +0200 | [diff] [blame] | 2403 | int __sys_getsockopt(int fd, int level, int optname, char __user *optval, |
| 2404 | int __user *optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2405 | { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2406 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2407 | struct socket *sock; |
Breno Leitao | 0b05b0c | 2023-10-16 06:47:42 -0700 | [diff] [blame] | 2408 | bool compat; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2409 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2410 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Christoph Hellwig | d8a9b38 | 2020-07-17 08:23:12 +0200 | [diff] [blame] | 2411 | if (!sock) |
| 2412 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2413 | |
Breno Leitao | 0b05b0c | 2023-10-16 06:47:42 -0700 | [diff] [blame] | 2414 | compat = in_compat_syscall(); |
| 2415 | err = do_sock_getsockopt(sock, compat, level, optname, |
| 2416 | USER_SOCKPTR(optval), USER_SOCKPTR(optlen)); |
Stanislav Fomichev | 0d01da6 | 2019-06-27 13:38:47 -0700 | [diff] [blame] | 2417 | |
Christoph Hellwig | d8a9b38 | 2020-07-17 08:23:12 +0200 | [diff] [blame] | 2418 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2419 | return err; |
| 2420 | } |
| 2421 | |
Dominik Brodowski | 13a2d70 | 2018-03-13 20:15:04 +0100 | [diff] [blame] | 2422 | SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, |
| 2423 | char __user *, optval, int __user *, optlen) |
| 2424 | { |
| 2425 | return __sys_getsockopt(fd, level, optname, optval, optlen); |
| 2426 | } |
| 2427 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2428 | /* |
| 2429 | * Shutdown a socket. |
| 2430 | */ |
| 2431 | |
Jens Axboe | b713c19 | 2020-09-05 11:13:35 -0600 | [diff] [blame] | 2432 | int __sys_shutdown_sock(struct socket *sock, int how) |
| 2433 | { |
| 2434 | int err; |
| 2435 | |
| 2436 | err = security_socket_shutdown(sock, how); |
| 2437 | if (!err) |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 2438 | err = READ_ONCE(sock->ops)->shutdown(sock, how); |
Jens Axboe | b713c19 | 2020-09-05 11:13:35 -0600 | [diff] [blame] | 2439 | |
| 2440 | return err; |
| 2441 | } |
| 2442 | |
Dominik Brodowski | 005a1ae | 2018-03-13 20:07:05 +0100 | [diff] [blame] | 2443 | int __sys_shutdown(int fd, int how) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2444 | { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2445 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2446 | struct socket *sock; |
| 2447 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2448 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 2449 | if (sock != NULL) { |
Jens Axboe | b713c19 | 2020-09-05 11:13:35 -0600 | [diff] [blame] | 2450 | err = __sys_shutdown_sock(sock, how); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2451 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2452 | } |
| 2453 | return err; |
| 2454 | } |
| 2455 | |
Dominik Brodowski | 005a1ae | 2018-03-13 20:07:05 +0100 | [diff] [blame] | 2456 | SYSCALL_DEFINE2(shutdown, int, fd, int, how) |
| 2457 | { |
| 2458 | return __sys_shutdown(fd, how); |
| 2459 | } |
| 2460 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2461 | /* A couple of helpful macros for getting the address of the 32/64 bit |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2462 | * fields which are the same type (int / unsigned) on our platforms. |
| 2463 | */ |
| 2464 | #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member) |
| 2465 | #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen) |
| 2466 | #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags) |
| 2467 | |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2468 | struct used_address { |
| 2469 | struct sockaddr_storage name; |
| 2470 | unsigned int name_len; |
| 2471 | }; |
| 2472 | |
Dylan Yudaken | 7fa875b | 2022-07-14 04:02:56 -0700 | [diff] [blame] | 2473 | int __copy_msghdr(struct msghdr *kmsg, |
| 2474 | struct user_msghdr *msg, |
| 2475 | struct sockaddr __user **save_addr) |
Dan Carpenter | 1661bf3 | 2013-10-03 00:27:20 +0300 | [diff] [blame] | 2476 | { |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 2477 | ssize_t err; |
| 2478 | |
Christoph Hellwig | 1f466e1 | 2020-05-11 13:59:13 +0200 | [diff] [blame] | 2479 | kmsg->msg_control_is_user = true; |
Eric Dumazet | 1228b34 | 2022-06-22 15:02:20 +0000 | [diff] [blame] | 2480 | kmsg->msg_get_inq = 0; |
Dylan Yudaken | 7fa875b | 2022-07-14 04:02:56 -0700 | [diff] [blame] | 2481 | kmsg->msg_control_user = msg->msg_control; |
| 2482 | kmsg->msg_controllen = msg->msg_controllen; |
| 2483 | kmsg->msg_flags = msg->msg_flags; |
Al Viro | ffb0755 | 2017-06-27 19:32:04 -0400 | [diff] [blame] | 2484 | |
Dylan Yudaken | 7fa875b | 2022-07-14 04:02:56 -0700 | [diff] [blame] | 2485 | kmsg->msg_namelen = msg->msg_namelen; |
| 2486 | if (!msg->msg_name) |
Ani Sinha | 6a2a2b3 | 2014-09-08 14:49:59 -0700 | [diff] [blame] | 2487 | kmsg->msg_namelen = 0; |
| 2488 | |
Matthew Leach | dbb490b | 2014-03-11 11:58:27 +0000 | [diff] [blame] | 2489 | if (kmsg->msg_namelen < 0) |
| 2490 | return -EINVAL; |
| 2491 | |
Dan Carpenter | 1661bf3 | 2013-10-03 00:27:20 +0300 | [diff] [blame] | 2492 | if (kmsg->msg_namelen > sizeof(struct sockaddr_storage)) |
Dan Carpenter | db31c55 | 2013-11-27 15:40:21 +0300 | [diff] [blame] | 2493 | kmsg->msg_namelen = sizeof(struct sockaddr_storage); |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 2494 | |
| 2495 | if (save_addr) |
Dylan Yudaken | 7fa875b | 2022-07-14 04:02:56 -0700 | [diff] [blame] | 2496 | *save_addr = msg->msg_name; |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 2497 | |
Dylan Yudaken | 7fa875b | 2022-07-14 04:02:56 -0700 | [diff] [blame] | 2498 | if (msg->msg_name && kmsg->msg_namelen) { |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 2499 | if (!save_addr) { |
Dylan Yudaken | 7fa875b | 2022-07-14 04:02:56 -0700 | [diff] [blame] | 2500 | err = move_addr_to_kernel(msg->msg_name, |
Paolo Abeni | 864d966 | 2017-07-21 18:49:45 +0200 | [diff] [blame] | 2501 | kmsg->msg_namelen, |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 2502 | kmsg->msg_name); |
| 2503 | if (err < 0) |
| 2504 | return err; |
| 2505 | } |
| 2506 | } else { |
| 2507 | kmsg->msg_name = NULL; |
| 2508 | kmsg->msg_namelen = 0; |
| 2509 | } |
| 2510 | |
Dylan Yudaken | 7fa875b | 2022-07-14 04:02:56 -0700 | [diff] [blame] | 2511 | if (msg->msg_iovlen > UIO_MAXIOV) |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 2512 | return -EMSGSIZE; |
| 2513 | |
tadeusz.struk@intel.com | 0345f93 | 2015-03-19 12:31:25 -0700 | [diff] [blame] | 2514 | kmsg->msg_iocb = NULL; |
Pavel Begunkov | 7c701d9 | 2022-07-12 21:52:29 +0100 | [diff] [blame] | 2515 | kmsg->msg_ubuf = NULL; |
Jens Axboe | 0a384ab | 2020-02-27 08:11:20 -0700 | [diff] [blame] | 2516 | return 0; |
| 2517 | } |
| 2518 | |
| 2519 | static int copy_msghdr_from_user(struct msghdr *kmsg, |
| 2520 | struct user_msghdr __user *umsg, |
| 2521 | struct sockaddr __user **save_addr, |
| 2522 | struct iovec **iov) |
| 2523 | { |
| 2524 | struct user_msghdr msg; |
| 2525 | ssize_t err; |
| 2526 | |
Dylan Yudaken | 7fa875b | 2022-07-14 04:02:56 -0700 | [diff] [blame] | 2527 | if (copy_from_user(&msg, umsg, sizeof(*umsg))) |
| 2528 | return -EFAULT; |
| 2529 | |
| 2530 | err = __copy_msghdr(kmsg, &msg, save_addr); |
Jens Axboe | 0a384ab | 2020-02-27 08:11:20 -0700 | [diff] [blame] | 2531 | if (err) |
| 2532 | return err; |
tadeusz.struk@intel.com | 0345f93 | 2015-03-19 12:31:25 -0700 | [diff] [blame] | 2533 | |
Al Viro | de4eda9 | 2022-09-15 20:25:47 -0400 | [diff] [blame] | 2534 | err = import_iovec(save_addr ? ITER_DEST : ITER_SOURCE, |
Al Viro | ffb0755 | 2017-06-27 19:32:04 -0400 | [diff] [blame] | 2535 | msg.msg_iov, msg.msg_iovlen, |
Al Viro | da18428 | 2015-03-21 19:29:06 -0400 | [diff] [blame] | 2536 | UIO_FASTIOV, iov, &kmsg->msg_iter); |
Jens Axboe | 87e5e6d | 2019-05-14 16:02:22 -0600 | [diff] [blame] | 2537 | return err < 0 ? err : 0; |
Dan Carpenter | 1661bf3 | 2013-10-03 00:27:20 +0300 | [diff] [blame] | 2538 | } |
| 2539 | |
Jens Axboe | 4257c8c | 2019-11-25 14:27:34 -0700 | [diff] [blame] | 2540 | static int ____sys_sendmsg(struct socket *sock, struct msghdr *msg_sys, |
| 2541 | unsigned int flags, struct used_address *used_address, |
| 2542 | unsigned int allowed_msghdr_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2543 | { |
Alex Williamson | b9d717a | 2005-09-26 14:28:02 -0700 | [diff] [blame] | 2544 | unsigned char ctl[sizeof(struct cmsghdr) + 20] |
Amit Kushwaha | 846cc12 | 2016-12-08 18:21:53 +0530 | [diff] [blame] | 2545 | __aligned(sizeof(__kernel_size_t)); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2546 | /* 20 is size of ipv6_pktinfo */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2547 | unsigned char *ctl_buf = ctl; |
Al Viro | d8725c8 | 2014-12-11 00:02:50 -0500 | [diff] [blame] | 2548 | int ctl_len; |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 2549 | ssize_t err; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2550 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2551 | err = -ENOBUFS; |
| 2552 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2553 | if (msg_sys->msg_controllen > INT_MAX) |
Jens Axboe | 4257c8c | 2019-11-25 14:27:34 -0700 | [diff] [blame] | 2554 | goto out; |
Tom Herbert | 28a94d8 | 2016-03-07 14:11:02 -0800 | [diff] [blame] | 2555 | flags |= (msg_sys->msg_flags & allowed_msghdr_flags); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2556 | ctl_len = msg_sys->msg_controllen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2557 | if ((MSG_CMSG_COMPAT & flags) && ctl_len) { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2558 | err = |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2559 | cmsghdr_from_user_compat_to_kern(msg_sys, sock->sk, ctl, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2560 | sizeof(ctl)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2561 | if (err) |
Jens Axboe | 4257c8c | 2019-11-25 14:27:34 -0700 | [diff] [blame] | 2562 | goto out; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2563 | ctl_buf = msg_sys->msg_control; |
| 2564 | ctl_len = msg_sys->msg_controllen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2565 | } else if (ctl_len) { |
David S. Miller | ac4340f | 2017-01-04 13:24:19 -0500 | [diff] [blame] | 2566 | BUILD_BUG_ON(sizeof(struct cmsghdr) != |
| 2567 | CMSG_ALIGN(sizeof(struct cmsghdr))); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2568 | if (ctl_len > sizeof(ctl)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2569 | ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2570 | if (ctl_buf == NULL) |
Jens Axboe | 4257c8c | 2019-11-25 14:27:34 -0700 | [diff] [blame] | 2571 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2572 | } |
| 2573 | err = -EFAULT; |
Christoph Hellwig | 1f466e1 | 2020-05-11 13:59:13 +0200 | [diff] [blame] | 2574 | if (copy_from_user(ctl_buf, msg_sys->msg_control_user, ctl_len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2575 | goto out_freectl; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2576 | msg_sys->msg_control = ctl_buf; |
Christoph Hellwig | 1f466e1 | 2020-05-11 13:59:13 +0200 | [diff] [blame] | 2577 | msg_sys->msg_control_is_user = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2578 | } |
David Howells | b841b90 | 2023-05-22 13:11:10 +0100 | [diff] [blame] | 2579 | flags &= ~MSG_INTERNAL_SENDMSG_FLAGS; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2580 | msg_sys->msg_flags = flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2581 | |
| 2582 | if (sock->file->f_flags & O_NONBLOCK) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2583 | msg_sys->msg_flags |= MSG_DONTWAIT; |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2584 | /* |
| 2585 | * If this is sendmmsg() and current destination address is same as |
| 2586 | * previously succeeded address, omit asking LSM's decision. |
| 2587 | * used_address->name_len is initialized to UINT_MAX so that the first |
| 2588 | * destination address never matches. |
| 2589 | */ |
Mathieu Desnoyers | bc909d9 | 2011-08-24 19:45:03 -0700 | [diff] [blame] | 2590 | if (used_address && msg_sys->msg_name && |
| 2591 | used_address->name_len == msg_sys->msg_namelen && |
| 2592 | !memcmp(&used_address->name, msg_sys->msg_name, |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2593 | used_address->name_len)) { |
Al Viro | d8725c8 | 2014-12-11 00:02:50 -0500 | [diff] [blame] | 2594 | err = sock_sendmsg_nosec(sock, msg_sys); |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2595 | goto out_freectl; |
| 2596 | } |
Jordan Rife | 86a7e0b | 2023-09-21 18:46:41 -0500 | [diff] [blame] | 2597 | err = __sock_sendmsg(sock, msg_sys); |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2598 | /* |
| 2599 | * If this is sendmmsg() and sending to current destination address was |
| 2600 | * successful, remember it. |
| 2601 | */ |
| 2602 | if (used_address && err >= 0) { |
| 2603 | used_address->name_len = msg_sys->msg_namelen; |
Mathieu Desnoyers | bc909d9 | 2011-08-24 19:45:03 -0700 | [diff] [blame] | 2604 | if (msg_sys->msg_name) |
| 2605 | memcpy(&used_address->name, msg_sys->msg_name, |
| 2606 | used_address->name_len); |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2607 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2608 | |
| 2609 | out_freectl: |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2610 | if (ctl_buf != ctl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2611 | sock_kfree_s(sock->sk, ctl_buf, ctl_len); |
Jens Axboe | 4257c8c | 2019-11-25 14:27:34 -0700 | [diff] [blame] | 2612 | out: |
| 2613 | return err; |
| 2614 | } |
| 2615 | |
Jens Axboe | e54e09c | 2024-03-12 09:55:45 -0600 | [diff] [blame] | 2616 | static int sendmsg_copy_msghdr(struct msghdr *msg, |
| 2617 | struct user_msghdr __user *umsg, unsigned flags, |
| 2618 | struct iovec **iov) |
Jens Axboe | 4257c8c | 2019-11-25 14:27:34 -0700 | [diff] [blame] | 2619 | { |
| 2620 | int err; |
| 2621 | |
| 2622 | if (flags & MSG_CMSG_COMPAT) { |
| 2623 | struct compat_msghdr __user *msg_compat; |
| 2624 | |
| 2625 | msg_compat = (struct compat_msghdr __user *) umsg; |
| 2626 | err = get_compat_msghdr(msg, msg_compat, NULL, iov); |
| 2627 | } else { |
| 2628 | err = copy_msghdr_from_user(msg, umsg, NULL, iov); |
| 2629 | } |
| 2630 | if (err < 0) |
| 2631 | return err; |
| 2632 | |
| 2633 | return 0; |
| 2634 | } |
| 2635 | |
| 2636 | static int ___sys_sendmsg(struct socket *sock, struct user_msghdr __user *msg, |
| 2637 | struct msghdr *msg_sys, unsigned int flags, |
| 2638 | struct used_address *used_address, |
| 2639 | unsigned int allowed_msghdr_flags) |
| 2640 | { |
| 2641 | struct sockaddr_storage address; |
| 2642 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; |
| 2643 | ssize_t err; |
| 2644 | |
| 2645 | msg_sys->msg_name = &address; |
| 2646 | |
| 2647 | err = sendmsg_copy_msghdr(msg_sys, msg, flags, &iov); |
| 2648 | if (err < 0) |
| 2649 | return err; |
| 2650 | |
| 2651 | err = ____sys_sendmsg(sock, msg_sys, flags, used_address, |
| 2652 | allowed_msghdr_flags); |
Al Viro | da18428 | 2015-03-21 19:29:06 -0400 | [diff] [blame] | 2653 | kfree(iov); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2654 | return err; |
| 2655 | } |
| 2656 | |
| 2657 | /* |
| 2658 | * BSD sendmsg interface |
| 2659 | */ |
Jens Axboe | 03b1230 | 2019-12-02 18:50:25 -0700 | [diff] [blame] | 2660 | long __sys_sendmsg_sock(struct socket *sock, struct msghdr *msg, |
Jens Axboe | 0fa03c6 | 2019-04-19 13:34:07 -0600 | [diff] [blame] | 2661 | unsigned int flags) |
| 2662 | { |
Jens Axboe | 03b1230 | 2019-12-02 18:50:25 -0700 | [diff] [blame] | 2663 | return ____sys_sendmsg(sock, msg, flags, NULL, 0); |
Jens Axboe | 0fa03c6 | 2019-04-19 13:34:07 -0600 | [diff] [blame] | 2664 | } |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2665 | |
Dominik Brodowski | e1834a3 | 2018-03-13 20:35:57 +0100 | [diff] [blame] | 2666 | long __sys_sendmsg(int fd, struct user_msghdr __user *msg, unsigned int flags, |
| 2667 | bool forbid_cmsg_compat) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2668 | { |
| 2669 | int fput_needed, err; |
| 2670 | struct msghdr msg_sys; |
Andy Lutomirski | 1be374a | 2013-05-22 14:07:44 -0700 | [diff] [blame] | 2671 | struct socket *sock; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2672 | |
Dominik Brodowski | e1834a3 | 2018-03-13 20:35:57 +0100 | [diff] [blame] | 2673 | if (forbid_cmsg_compat && (flags & MSG_CMSG_COMPAT)) |
| 2674 | return -EINVAL; |
| 2675 | |
Andy Lutomirski | 1be374a | 2013-05-22 14:07:44 -0700 | [diff] [blame] | 2676 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2677 | if (!sock) |
| 2678 | goto out; |
| 2679 | |
Tom Herbert | 28a94d8 | 2016-03-07 14:11:02 -0800 | [diff] [blame] | 2680 | err = ___sys_sendmsg(sock, msg, &msg_sys, flags, NULL, 0); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2681 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2682 | fput_light(sock->file, fput_needed); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2683 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2684 | return err; |
| 2685 | } |
| 2686 | |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 2687 | SYSCALL_DEFINE3(sendmsg, int, fd, struct user_msghdr __user *, msg, unsigned int, flags) |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2688 | { |
Dominik Brodowski | e1834a3 | 2018-03-13 20:35:57 +0100 | [diff] [blame] | 2689 | return __sys_sendmsg(fd, msg, flags, true); |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2690 | } |
| 2691 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2692 | /* |
| 2693 | * Linux sendmmsg interface |
| 2694 | */ |
| 2695 | |
| 2696 | int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, |
Dominik Brodowski | e1834a3 | 2018-03-13 20:35:57 +0100 | [diff] [blame] | 2697 | unsigned int flags, bool forbid_cmsg_compat) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2698 | { |
| 2699 | int fput_needed, err, datagrams; |
| 2700 | struct socket *sock; |
| 2701 | struct mmsghdr __user *entry; |
| 2702 | struct compat_mmsghdr __user *compat_entry; |
| 2703 | struct msghdr msg_sys; |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2704 | struct used_address used_address; |
Tom Herbert | f092276 | 2016-03-07 14:11:03 -0800 | [diff] [blame] | 2705 | unsigned int oflags = flags; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2706 | |
Dominik Brodowski | e1834a3 | 2018-03-13 20:35:57 +0100 | [diff] [blame] | 2707 | if (forbid_cmsg_compat && (flags & MSG_CMSG_COMPAT)) |
| 2708 | return -EINVAL; |
| 2709 | |
Anton Blanchard | 98382f4 | 2011-08-04 14:07:39 +0000 | [diff] [blame] | 2710 | if (vlen > UIO_MAXIOV) |
| 2711 | vlen = UIO_MAXIOV; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2712 | |
| 2713 | datagrams = 0; |
| 2714 | |
| 2715 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 2716 | if (!sock) |
| 2717 | return err; |
| 2718 | |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2719 | used_address.name_len = UINT_MAX; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2720 | entry = mmsg; |
| 2721 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
Anton Blanchard | 728ffb8 | 2011-08-04 14:07:38 +0000 | [diff] [blame] | 2722 | err = 0; |
Tom Herbert | f092276 | 2016-03-07 14:11:03 -0800 | [diff] [blame] | 2723 | flags |= MSG_BATCH; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2724 | |
| 2725 | while (datagrams < vlen) { |
Tom Herbert | f092276 | 2016-03-07 14:11:03 -0800 | [diff] [blame] | 2726 | if (datagrams == vlen - 1) |
| 2727 | flags = oflags; |
| 2728 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2729 | if (MSG_CMSG_COMPAT & flags) { |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 2730 | err = ___sys_sendmsg(sock, (struct user_msghdr __user *)compat_entry, |
Tom Herbert | 28a94d8 | 2016-03-07 14:11:02 -0800 | [diff] [blame] | 2731 | &msg_sys, flags, &used_address, MSG_EOR); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2732 | if (err < 0) |
| 2733 | break; |
| 2734 | err = __put_user(err, &compat_entry->msg_len); |
| 2735 | ++compat_entry; |
| 2736 | } else { |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2737 | err = ___sys_sendmsg(sock, |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 2738 | (struct user_msghdr __user *)entry, |
Tom Herbert | 28a94d8 | 2016-03-07 14:11:02 -0800 | [diff] [blame] | 2739 | &msg_sys, flags, &used_address, MSG_EOR); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2740 | if (err < 0) |
| 2741 | break; |
| 2742 | err = put_user(err, &entry->msg_len); |
| 2743 | ++entry; |
| 2744 | } |
| 2745 | |
| 2746 | if (err) |
| 2747 | break; |
| 2748 | ++datagrams; |
Soheil Hassas Yeganeh | 3023898 | 2016-11-04 15:36:49 -0400 | [diff] [blame] | 2749 | if (msg_data_left(&msg_sys)) |
| 2750 | break; |
Eric Dumazet | a78cb84 | 2016-01-08 08:37:20 -0800 | [diff] [blame] | 2751 | cond_resched(); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2752 | } |
| 2753 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2754 | fput_light(sock->file, fput_needed); |
| 2755 | |
Anton Blanchard | 728ffb8 | 2011-08-04 14:07:38 +0000 | [diff] [blame] | 2756 | /* We only return an error if no datagrams were able to be sent */ |
| 2757 | if (datagrams != 0) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2758 | return datagrams; |
| 2759 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2760 | return err; |
| 2761 | } |
| 2762 | |
| 2763 | SYSCALL_DEFINE4(sendmmsg, int, fd, struct mmsghdr __user *, mmsg, |
| 2764 | unsigned int, vlen, unsigned int, flags) |
| 2765 | { |
Dominik Brodowski | e1834a3 | 2018-03-13 20:35:57 +0100 | [diff] [blame] | 2766 | return __sys_sendmmsg(fd, mmsg, vlen, flags, true); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2767 | } |
| 2768 | |
Jens Axboe | e54e09c | 2024-03-12 09:55:45 -0600 | [diff] [blame] | 2769 | static int recvmsg_copy_msghdr(struct msghdr *msg, |
| 2770 | struct user_msghdr __user *umsg, unsigned flags, |
| 2771 | struct sockaddr __user **uaddr, |
| 2772 | struct iovec **iov) |
Jens Axboe | 4257c8c | 2019-11-25 14:27:34 -0700 | [diff] [blame] | 2773 | { |
| 2774 | ssize_t err; |
| 2775 | |
| 2776 | if (MSG_CMSG_COMPAT & flags) { |
| 2777 | struct compat_msghdr __user *msg_compat; |
| 2778 | |
| 2779 | msg_compat = (struct compat_msghdr __user *) umsg; |
| 2780 | err = get_compat_msghdr(msg, msg_compat, uaddr, iov); |
| 2781 | } else { |
| 2782 | err = copy_msghdr_from_user(msg, umsg, uaddr, iov); |
| 2783 | } |
| 2784 | if (err < 0) |
| 2785 | return err; |
| 2786 | |
| 2787 | return 0; |
| 2788 | } |
| 2789 | |
| 2790 | static int ____sys_recvmsg(struct socket *sock, struct msghdr *msg_sys, |
| 2791 | struct user_msghdr __user *msg, |
| 2792 | struct sockaddr __user *uaddr, |
| 2793 | unsigned int flags, int nosec) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2794 | { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2795 | struct compat_msghdr __user *msg_compat = |
Jens Axboe | 4257c8c | 2019-11-25 14:27:34 -0700 | [diff] [blame] | 2796 | (struct compat_msghdr __user *) msg; |
| 2797 | int __user *uaddr_len = COMPAT_NAMELEN(msg); |
| 2798 | struct sockaddr_storage addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2799 | unsigned long cmsg_ptr; |
Al Viro | 2da6290 | 2015-03-14 21:13:46 -0400 | [diff] [blame] | 2800 | int len; |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 2801 | ssize_t err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2802 | |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 2803 | msg_sys->msg_name = &addr; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2804 | cmsg_ptr = (unsigned long)msg_sys->msg_control; |
| 2805 | msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2806 | |
Hannes Frederic Sowa | f3d3342 | 2013-11-21 03:14:22 +0100 | [diff] [blame] | 2807 | /* We assume all kernel code knows the size of sockaddr_storage */ |
| 2808 | msg_sys->msg_namelen = 0; |
| 2809 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2810 | if (sock->file->f_flags & O_NONBLOCK) |
| 2811 | flags |= MSG_DONTWAIT; |
Eric Dumazet | 1af6622 | 2019-12-06 09:38:36 -0800 | [diff] [blame] | 2812 | |
| 2813 | if (unlikely(nosec)) |
| 2814 | err = sock_recvmsg_nosec(sock, msg_sys, flags); |
| 2815 | else |
| 2816 | err = sock_recvmsg(sock, msg_sys, flags); |
| 2817 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2818 | if (err < 0) |
Jens Axboe | 4257c8c | 2019-11-25 14:27:34 -0700 | [diff] [blame] | 2819 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2820 | len = err; |
| 2821 | |
| 2822 | if (uaddr != NULL) { |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 2823 | err = move_addr_to_user(&addr, |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2824 | msg_sys->msg_namelen, uaddr, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2825 | uaddr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2826 | if (err < 0) |
Jens Axboe | 4257c8c | 2019-11-25 14:27:34 -0700 | [diff] [blame] | 2827 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2828 | } |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2829 | err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT), |
David S. Miller | 37f7f42 | 2005-09-16 16:51:01 -0700 | [diff] [blame] | 2830 | COMPAT_FLAGS(msg)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2831 | if (err) |
Jens Axboe | 4257c8c | 2019-11-25 14:27:34 -0700 | [diff] [blame] | 2832 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2833 | if (MSG_CMSG_COMPAT & flags) |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2834 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2835 | &msg_compat->msg_controllen); |
| 2836 | else |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2837 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2838 | &msg->msg_controllen); |
| 2839 | if (err) |
Jens Axboe | 4257c8c | 2019-11-25 14:27:34 -0700 | [diff] [blame] | 2840 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2841 | err = len; |
Jens Axboe | 4257c8c | 2019-11-25 14:27:34 -0700 | [diff] [blame] | 2842 | out: |
| 2843 | return err; |
| 2844 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2845 | |
Jens Axboe | 4257c8c | 2019-11-25 14:27:34 -0700 | [diff] [blame] | 2846 | static int ___sys_recvmsg(struct socket *sock, struct user_msghdr __user *msg, |
| 2847 | struct msghdr *msg_sys, unsigned int flags, int nosec) |
| 2848 | { |
| 2849 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; |
| 2850 | /* user mode address pointers */ |
| 2851 | struct sockaddr __user *uaddr; |
| 2852 | ssize_t err; |
| 2853 | |
| 2854 | err = recvmsg_copy_msghdr(msg_sys, msg, flags, &uaddr, &iov); |
| 2855 | if (err < 0) |
| 2856 | return err; |
| 2857 | |
| 2858 | err = ____sys_recvmsg(sock, msg_sys, msg, uaddr, flags, nosec); |
Al Viro | da18428 | 2015-03-21 19:29:06 -0400 | [diff] [blame] | 2859 | kfree(iov); |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2860 | return err; |
| 2861 | } |
| 2862 | |
| 2863 | /* |
| 2864 | * BSD recvmsg interface |
| 2865 | */ |
| 2866 | |
Jens Axboe | 03b1230 | 2019-12-02 18:50:25 -0700 | [diff] [blame] | 2867 | long __sys_recvmsg_sock(struct socket *sock, struct msghdr *msg, |
| 2868 | struct user_msghdr __user *umsg, |
| 2869 | struct sockaddr __user *uaddr, unsigned int flags) |
Jens Axboe | aa1fa28 | 2019-04-19 13:38:09 -0600 | [diff] [blame] | 2870 | { |
Jens Axboe | 03b1230 | 2019-12-02 18:50:25 -0700 | [diff] [blame] | 2871 | return ____sys_recvmsg(sock, msg, umsg, uaddr, flags, 0); |
Jens Axboe | aa1fa28 | 2019-04-19 13:38:09 -0600 | [diff] [blame] | 2872 | } |
| 2873 | |
Dominik Brodowski | e1834a3 | 2018-03-13 20:35:57 +0100 | [diff] [blame] | 2874 | long __sys_recvmsg(int fd, struct user_msghdr __user *msg, unsigned int flags, |
| 2875 | bool forbid_cmsg_compat) |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2876 | { |
| 2877 | int fput_needed, err; |
| 2878 | struct msghdr msg_sys; |
Andy Lutomirski | 1be374a | 2013-05-22 14:07:44 -0700 | [diff] [blame] | 2879 | struct socket *sock; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2880 | |
Dominik Brodowski | e1834a3 | 2018-03-13 20:35:57 +0100 | [diff] [blame] | 2881 | if (forbid_cmsg_compat && (flags & MSG_CMSG_COMPAT)) |
| 2882 | return -EINVAL; |
| 2883 | |
Andy Lutomirski | 1be374a | 2013-05-22 14:07:44 -0700 | [diff] [blame] | 2884 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2885 | if (!sock) |
| 2886 | goto out; |
| 2887 | |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2888 | err = ___sys_recvmsg(sock, msg, &msg_sys, flags, 0); |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2889 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2890 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2891 | out: |
| 2892 | return err; |
| 2893 | } |
| 2894 | |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 2895 | SYSCALL_DEFINE3(recvmsg, int, fd, struct user_msghdr __user *, msg, |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2896 | unsigned int, flags) |
| 2897 | { |
Dominik Brodowski | e1834a3 | 2018-03-13 20:35:57 +0100 | [diff] [blame] | 2898 | return __sys_recvmsg(fd, msg, flags, true); |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2899 | } |
| 2900 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2901 | /* |
| 2902 | * Linux recvmmsg interface |
| 2903 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2904 | |
Arnd Bergmann | e11d428 | 2018-04-18 13:43:52 +0200 | [diff] [blame] | 2905 | static int do_recvmmsg(int fd, struct mmsghdr __user *mmsg, |
| 2906 | unsigned int vlen, unsigned int flags, |
| 2907 | struct timespec64 *timeout) |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2908 | { |
| 2909 | int fput_needed, err, datagrams; |
| 2910 | struct socket *sock; |
| 2911 | struct mmsghdr __user *entry; |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2912 | struct compat_mmsghdr __user *compat_entry; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2913 | struct msghdr msg_sys; |
Deepa Dinamani | 766b9f9 | 2016-05-19 17:09:05 -0700 | [diff] [blame] | 2914 | struct timespec64 end_time; |
| 2915 | struct timespec64 timeout64; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2916 | |
| 2917 | if (timeout && |
| 2918 | poll_select_set_timeout(&end_time, timeout->tv_sec, |
| 2919 | timeout->tv_nsec)) |
| 2920 | return -EINVAL; |
| 2921 | |
| 2922 | datagrams = 0; |
| 2923 | |
| 2924 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 2925 | if (!sock) |
| 2926 | return err; |
| 2927 | |
Soheil Hassas Yeganeh | 7797dc4 | 2018-02-27 18:22:40 -0500 | [diff] [blame] | 2928 | if (likely(!(flags & MSG_ERRQUEUE))) { |
| 2929 | err = sock_error(sock->sk); |
| 2930 | if (err) { |
| 2931 | datagrams = err; |
| 2932 | goto out_put; |
| 2933 | } |
Maxime Jayat | e623a9e | 2017-02-21 18:35:51 +0100 | [diff] [blame] | 2934 | } |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2935 | |
| 2936 | entry = mmsg; |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2937 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2938 | |
| 2939 | while (datagrams < vlen) { |
| 2940 | /* |
| 2941 | * No need to ask LSM for more than the first datagram. |
| 2942 | */ |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2943 | if (MSG_CMSG_COMPAT & flags) { |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 2944 | err = ___sys_recvmsg(sock, (struct user_msghdr __user *)compat_entry, |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2945 | &msg_sys, flags & ~MSG_WAITFORONE, |
| 2946 | datagrams); |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2947 | if (err < 0) |
| 2948 | break; |
| 2949 | err = __put_user(err, &compat_entry->msg_len); |
| 2950 | ++compat_entry; |
| 2951 | } else { |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2952 | err = ___sys_recvmsg(sock, |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 2953 | (struct user_msghdr __user *)entry, |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2954 | &msg_sys, flags & ~MSG_WAITFORONE, |
| 2955 | datagrams); |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2956 | if (err < 0) |
| 2957 | break; |
| 2958 | err = put_user(err, &entry->msg_len); |
| 2959 | ++entry; |
| 2960 | } |
| 2961 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2962 | if (err) |
| 2963 | break; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2964 | ++datagrams; |
| 2965 | |
Brandon L Black | 71c5c159 | 2010-03-26 16:18:03 +0000 | [diff] [blame] | 2966 | /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */ |
| 2967 | if (flags & MSG_WAITFORONE) |
| 2968 | flags |= MSG_DONTWAIT; |
| 2969 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2970 | if (timeout) { |
Deepa Dinamani | 766b9f9 | 2016-05-19 17:09:05 -0700 | [diff] [blame] | 2971 | ktime_get_ts64(&timeout64); |
Arnd Bergmann | c2e6c85 | 2018-04-18 13:42:25 +0200 | [diff] [blame] | 2972 | *timeout = timespec64_sub(end_time, timeout64); |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2973 | if (timeout->tv_sec < 0) { |
| 2974 | timeout->tv_sec = timeout->tv_nsec = 0; |
| 2975 | break; |
| 2976 | } |
| 2977 | |
| 2978 | /* Timeout, return less than vlen datagrams */ |
| 2979 | if (timeout->tv_nsec == 0 && timeout->tv_sec == 0) |
| 2980 | break; |
| 2981 | } |
| 2982 | |
| 2983 | /* Out of band data, return right away */ |
| 2984 | if (msg_sys.msg_flags & MSG_OOB) |
| 2985 | break; |
Eric Dumazet | a78cb84 | 2016-01-08 08:37:20 -0800 | [diff] [blame] | 2986 | cond_resched(); |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2987 | } |
| 2988 | |
Arnaldo Carvalho de Melo | 34b88a6 | 2016-03-14 09:56:35 -0300 | [diff] [blame] | 2989 | if (err == 0) |
| 2990 | goto out_put; |
| 2991 | |
| 2992 | if (datagrams == 0) { |
| 2993 | datagrams = err; |
| 2994 | goto out_put; |
| 2995 | } |
| 2996 | |
| 2997 | /* |
| 2998 | * We may return less entries than requested (vlen) if the |
| 2999 | * sock is non block and there aren't enough datagrams... |
| 3000 | */ |
| 3001 | if (err != -EAGAIN) { |
| 3002 | /* |
| 3003 | * ... or if recvmsg returns an error after we |
| 3004 | * received some datagrams, where we record the |
| 3005 | * error to return on the next call or if the |
| 3006 | * app asks about it using getsockopt(SO_ERROR). |
| 3007 | */ |
Eric Dumazet | e05a5f5 | 2023-05-09 16:35:53 +0000 | [diff] [blame] | 3008 | WRITE_ONCE(sock->sk->sk_err, -err); |
Arnaldo Carvalho de Melo | 34b88a6 | 2016-03-14 09:56:35 -0300 | [diff] [blame] | 3009 | } |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 3010 | out_put: |
| 3011 | fput_light(sock->file, fput_needed); |
| 3012 | |
Arnaldo Carvalho de Melo | 34b88a6 | 2016-03-14 09:56:35 -0300 | [diff] [blame] | 3013 | return datagrams; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 3014 | } |
| 3015 | |
Arnd Bergmann | e11d428 | 2018-04-18 13:43:52 +0200 | [diff] [blame] | 3016 | int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, |
| 3017 | unsigned int vlen, unsigned int flags, |
| 3018 | struct __kernel_timespec __user *timeout, |
| 3019 | struct old_timespec32 __user *timeout32) |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 3020 | { |
| 3021 | int datagrams; |
Arnd Bergmann | c2e6c85 | 2018-04-18 13:42:25 +0200 | [diff] [blame] | 3022 | struct timespec64 timeout_sys; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 3023 | |
Arnd Bergmann | e11d428 | 2018-04-18 13:43:52 +0200 | [diff] [blame] | 3024 | if (timeout && get_timespec64(&timeout_sys, timeout)) |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 3025 | return -EFAULT; |
| 3026 | |
Arnd Bergmann | e11d428 | 2018-04-18 13:43:52 +0200 | [diff] [blame] | 3027 | if (timeout32 && get_old_timespec32(&timeout_sys, timeout32)) |
| 3028 | return -EFAULT; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 3029 | |
Arnd Bergmann | e11d428 | 2018-04-18 13:43:52 +0200 | [diff] [blame] | 3030 | if (!timeout && !timeout32) |
| 3031 | return do_recvmmsg(fd, mmsg, vlen, flags, NULL); |
| 3032 | |
| 3033 | datagrams = do_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); |
| 3034 | |
| 3035 | if (datagrams <= 0) |
| 3036 | return datagrams; |
| 3037 | |
| 3038 | if (timeout && put_timespec64(&timeout_sys, timeout)) |
| 3039 | datagrams = -EFAULT; |
| 3040 | |
| 3041 | if (timeout32 && put_old_timespec32(&timeout_sys, timeout32)) |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 3042 | datagrams = -EFAULT; |
| 3043 | |
| 3044 | return datagrams; |
| 3045 | } |
| 3046 | |
Dominik Brodowski | 1255e26 | 2018-03-13 20:44:21 +0100 | [diff] [blame] | 3047 | SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg, |
| 3048 | unsigned int, vlen, unsigned int, flags, |
Arnd Bergmann | c2e6c85 | 2018-04-18 13:42:25 +0200 | [diff] [blame] | 3049 | struct __kernel_timespec __user *, timeout) |
Dominik Brodowski | 1255e26 | 2018-03-13 20:44:21 +0100 | [diff] [blame] | 3050 | { |
Arnd Bergmann | e11d428 | 2018-04-18 13:43:52 +0200 | [diff] [blame] | 3051 | if (flags & MSG_CMSG_COMPAT) |
| 3052 | return -EINVAL; |
| 3053 | |
| 3054 | return __sys_recvmmsg(fd, mmsg, vlen, flags, timeout, NULL); |
Dominik Brodowski | 1255e26 | 2018-03-13 20:44:21 +0100 | [diff] [blame] | 3055 | } |
| 3056 | |
Arnd Bergmann | e11d428 | 2018-04-18 13:43:52 +0200 | [diff] [blame] | 3057 | #ifdef CONFIG_COMPAT_32BIT_TIME |
| 3058 | SYSCALL_DEFINE5(recvmmsg_time32, int, fd, struct mmsghdr __user *, mmsg, |
| 3059 | unsigned int, vlen, unsigned int, flags, |
| 3060 | struct old_timespec32 __user *, timeout) |
| 3061 | { |
| 3062 | if (flags & MSG_CMSG_COMPAT) |
| 3063 | return -EINVAL; |
| 3064 | |
| 3065 | return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL, timeout); |
| 3066 | } |
| 3067 | #endif |
| 3068 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 3069 | #ifdef __ARCH_WANT_SYS_SOCKETCALL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3070 | /* Argument list sizes for sys_socketcall */ |
| 3071 | #define AL(x) ((x) * sizeof(unsigned long)) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 3072 | static const unsigned char nargs[21] = { |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3073 | AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), |
| 3074 | AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), |
| 3075 | AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 3076 | AL(4), AL(5), AL(4) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3077 | }; |
| 3078 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3079 | #undef AL |
| 3080 | |
| 3081 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3082 | * System call vectors. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3083 | * |
| 3084 | * Argument checking cleaned up. Saved 20% in size. |
| 3085 | * This function doesn't need to set the kernel lock because |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3086 | * it is set by the callees. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3087 | */ |
| 3088 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 3089 | SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3090 | { |
Chen Gang | 2950fa9 | 2013-04-07 16:55:23 +0800 | [diff] [blame] | 3091 | unsigned long a[AUDITSC_ARGS]; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3092 | unsigned long a0, a1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3093 | int err; |
Arjan van de Ven | 4737905 | 2009-09-28 12:57:44 -0700 | [diff] [blame] | 3094 | unsigned int len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3095 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 3096 | if (call < 1 || call > SYS_SENDMMSG) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3097 | return -EINVAL; |
Jeremy Cline | c8e8cd5 | 2018-07-27 22:43:01 +0000 | [diff] [blame] | 3098 | call = array_index_nospec(call, SYS_SENDMMSG + 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3099 | |
Arjan van de Ven | 4737905 | 2009-09-28 12:57:44 -0700 | [diff] [blame] | 3100 | len = nargs[call]; |
| 3101 | if (len > sizeof(a)) |
| 3102 | return -EINVAL; |
| 3103 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3104 | /* copy_from_user should be SMP safe. */ |
Arjan van de Ven | 4737905 | 2009-09-28 12:57:44 -0700 | [diff] [blame] | 3105 | if (copy_from_user(a, args, len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3106 | return -EFAULT; |
David Woodhouse | 3ec3b2f | 2005-05-17 12:08:48 +0100 | [diff] [blame] | 3107 | |
Chen Gang | 2950fa9 | 2013-04-07 16:55:23 +0800 | [diff] [blame] | 3108 | err = audit_socketcall(nargs[call] / sizeof(unsigned long), a); |
| 3109 | if (err) |
| 3110 | return err; |
David Woodhouse | 3ec3b2f | 2005-05-17 12:08:48 +0100 | [diff] [blame] | 3111 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3112 | a0 = a[0]; |
| 3113 | a1 = a[1]; |
| 3114 | |
| 3115 | switch (call) { |
| 3116 | case SYS_SOCKET: |
Dominik Brodowski | 9d6a15c | 2018-03-13 19:29:43 +0100 | [diff] [blame] | 3117 | err = __sys_socket(a0, a1, a[2]); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3118 | break; |
| 3119 | case SYS_BIND: |
Dominik Brodowski | a87d35d | 2018-03-13 19:33:09 +0100 | [diff] [blame] | 3120 | err = __sys_bind(a0, (struct sockaddr __user *)a1, a[2]); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3121 | break; |
| 3122 | case SYS_CONNECT: |
Dominik Brodowski | 1387c2c | 2018-03-13 19:35:09 +0100 | [diff] [blame] | 3123 | err = __sys_connect(a0, (struct sockaddr __user *)a1, a[2]); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3124 | break; |
| 3125 | case SYS_LISTEN: |
Dominik Brodowski | 25e290e | 2018-03-13 19:36:54 +0100 | [diff] [blame] | 3126 | err = __sys_listen(a0, a1); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3127 | break; |
| 3128 | case SYS_ACCEPT: |
Dominik Brodowski | 4541e80 | 2018-03-13 19:24:23 +0100 | [diff] [blame] | 3129 | err = __sys_accept4(a0, (struct sockaddr __user *)a1, |
| 3130 | (int __user *)a[2], 0); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3131 | break; |
| 3132 | case SYS_GETSOCKNAME: |
| 3133 | err = |
Dominik Brodowski | 8882a10 | 2018-03-13 19:43:14 +0100 | [diff] [blame] | 3134 | __sys_getsockname(a0, (struct sockaddr __user *)a1, |
| 3135 | (int __user *)a[2]); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3136 | break; |
| 3137 | case SYS_GETPEERNAME: |
| 3138 | err = |
Dominik Brodowski | b21c8f8 | 2018-03-13 19:47:00 +0100 | [diff] [blame] | 3139 | __sys_getpeername(a0, (struct sockaddr __user *)a1, |
| 3140 | (int __user *)a[2]); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3141 | break; |
| 3142 | case SYS_SOCKETPAIR: |
Dominik Brodowski | 6debc8d | 2018-03-13 19:49:23 +0100 | [diff] [blame] | 3143 | err = __sys_socketpair(a0, a1, a[2], (int __user *)a[3]); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3144 | break; |
| 3145 | case SYS_SEND: |
Dominik Brodowski | f3bf896 | 2018-03-13 19:52:00 +0100 | [diff] [blame] | 3146 | err = __sys_sendto(a0, (void __user *)a1, a[2], a[3], |
| 3147 | NULL, 0); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3148 | break; |
| 3149 | case SYS_SENDTO: |
Dominik Brodowski | 211b634 | 2018-03-13 19:18:52 +0100 | [diff] [blame] | 3150 | err = __sys_sendto(a0, (void __user *)a1, a[2], a[3], |
| 3151 | (struct sockaddr __user *)a[4], a[5]); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3152 | break; |
| 3153 | case SYS_RECV: |
Dominik Brodowski | d27e9af | 2018-03-13 19:54:17 +0100 | [diff] [blame] | 3154 | err = __sys_recvfrom(a0, (void __user *)a1, a[2], a[3], |
| 3155 | NULL, NULL); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3156 | break; |
| 3157 | case SYS_RECVFROM: |
Dominik Brodowski | 7a09e1e | 2018-03-13 19:10:06 +0100 | [diff] [blame] | 3158 | err = __sys_recvfrom(a0, (void __user *)a1, a[2], a[3], |
| 3159 | (struct sockaddr __user *)a[4], |
| 3160 | (int __user *)a[5]); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3161 | break; |
| 3162 | case SYS_SHUTDOWN: |
Dominik Brodowski | 005a1ae | 2018-03-13 20:07:05 +0100 | [diff] [blame] | 3163 | err = __sys_shutdown(a0, a1); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3164 | break; |
| 3165 | case SYS_SETSOCKOPT: |
Dominik Brodowski | cc36dca | 2018-03-13 20:10:59 +0100 | [diff] [blame] | 3166 | err = __sys_setsockopt(a0, a1, a[2], (char __user *)a[3], |
| 3167 | a[4]); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3168 | break; |
| 3169 | case SYS_GETSOCKOPT: |
| 3170 | err = |
Dominik Brodowski | 13a2d70 | 2018-03-13 20:15:04 +0100 | [diff] [blame] | 3171 | __sys_getsockopt(a0, a1, a[2], (char __user *)a[3], |
| 3172 | (int __user *)a[4]); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3173 | break; |
| 3174 | case SYS_SENDMSG: |
Dominik Brodowski | e1834a3 | 2018-03-13 20:35:57 +0100 | [diff] [blame] | 3175 | err = __sys_sendmsg(a0, (struct user_msghdr __user *)a1, |
| 3176 | a[2], true); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3177 | break; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 3178 | case SYS_SENDMMSG: |
Dominik Brodowski | e1834a3 | 2018-03-13 20:35:57 +0100 | [diff] [blame] | 3179 | err = __sys_sendmmsg(a0, (struct mmsghdr __user *)a1, a[2], |
| 3180 | a[3], true); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 3181 | break; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3182 | case SYS_RECVMSG: |
Dominik Brodowski | e1834a3 | 2018-03-13 20:35:57 +0100 | [diff] [blame] | 3183 | err = __sys_recvmsg(a0, (struct user_msghdr __user *)a1, |
| 3184 | a[2], true); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3185 | break; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 3186 | case SYS_RECVMMSG: |
Arnd Bergmann | 3ca47e9 | 2019-04-23 17:43:50 +0200 | [diff] [blame] | 3187 | if (IS_ENABLED(CONFIG_64BIT)) |
Arnd Bergmann | e11d428 | 2018-04-18 13:43:52 +0200 | [diff] [blame] | 3188 | err = __sys_recvmmsg(a0, (struct mmsghdr __user *)a1, |
| 3189 | a[2], a[3], |
| 3190 | (struct __kernel_timespec __user *)a[4], |
| 3191 | NULL); |
| 3192 | else |
| 3193 | err = __sys_recvmmsg(a0, (struct mmsghdr __user *)a1, |
| 3194 | a[2], a[3], NULL, |
| 3195 | (struct old_timespec32 __user *)a[4]); |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 3196 | break; |
Ulrich Drepper | de11def | 2008-11-19 15:36:14 -0800 | [diff] [blame] | 3197 | case SYS_ACCEPT4: |
Dominik Brodowski | 4541e80 | 2018-03-13 19:24:23 +0100 | [diff] [blame] | 3198 | err = __sys_accept4(a0, (struct sockaddr __user *)a1, |
| 3199 | (int __user *)a[2], a[3]); |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 3200 | break; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3201 | default: |
| 3202 | err = -EINVAL; |
| 3203 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3204 | } |
| 3205 | return err; |
| 3206 | } |
| 3207 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3208 | #endif /* __ARCH_WANT_SYS_SOCKETCALL */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3209 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 3210 | /** |
| 3211 | * sock_register - add a socket protocol handler |
| 3212 | * @ops: description of protocol |
| 3213 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3214 | * This function is called by a protocol handler that wants to |
| 3215 | * advertise its address family, and have it linked into the |
Masanari Iida | e793c0f | 2014-09-04 23:44:36 +0900 | [diff] [blame] | 3216 | * socket interface. The value ops->family corresponds to the |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 3217 | * socket system call protocol family. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3218 | */ |
Stephen Hemminger | f0fd27d | 2006-08-09 21:03:17 -0700 | [diff] [blame] | 3219 | int sock_register(const struct net_proto_family *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3220 | { |
| 3221 | int err; |
| 3222 | |
| 3223 | if (ops->family >= NPROTO) { |
Yang Yingliang | 3410f22 | 2014-02-12 17:09:55 +0800 | [diff] [blame] | 3224 | pr_crit("protocol %d >= NPROTO(%d)\n", ops->family, NPROTO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3225 | return -ENOBUFS; |
| 3226 | } |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 3227 | |
| 3228 | spin_lock(&net_family_lock); |
Eric Dumazet | 190683a | 2010-11-10 10:50:44 +0000 | [diff] [blame] | 3229 | if (rcu_dereference_protected(net_families[ops->family], |
| 3230 | lockdep_is_held(&net_family_lock))) |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 3231 | err = -EEXIST; |
| 3232 | else { |
Eric Dumazet | cf778b0 | 2012-01-12 04:41:32 +0000 | [diff] [blame] | 3233 | rcu_assign_pointer(net_families[ops->family], ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3234 | err = 0; |
| 3235 | } |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 3236 | spin_unlock(&net_family_lock); |
| 3237 | |
Yejune Deng | fe0bdbd | 2021-06-21 13:12:25 +0800 | [diff] [blame] | 3238 | pr_info("NET: Registered %s protocol family\n", pf_family_names[ops->family]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3239 | return err; |
| 3240 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3241 | EXPORT_SYMBOL(sock_register); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3242 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 3243 | /** |
| 3244 | * sock_unregister - remove a protocol handler |
| 3245 | * @family: protocol family to remove |
| 3246 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3247 | * This function is called by a protocol handler that wants to |
| 3248 | * remove its address family, and have it unlinked from the |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 3249 | * new socket creation. |
| 3250 | * |
| 3251 | * If protocol handler is a module, then it can use module reference |
| 3252 | * counts to protect against new references. If protocol handler is not |
| 3253 | * a module then it needs to provide its own protection in |
| 3254 | * the ops->create routine. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3255 | */ |
Stephen Hemminger | f0fd27d | 2006-08-09 21:03:17 -0700 | [diff] [blame] | 3256 | void sock_unregister(int family) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3257 | { |
Stephen Hemminger | f0fd27d | 2006-08-09 21:03:17 -0700 | [diff] [blame] | 3258 | BUG_ON(family < 0 || family >= NPROTO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3259 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 3260 | spin_lock(&net_family_lock); |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 3261 | RCU_INIT_POINTER(net_families[family], NULL); |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 3262 | spin_unlock(&net_family_lock); |
| 3263 | |
| 3264 | synchronize_rcu(); |
| 3265 | |
Yejune Deng | fe0bdbd | 2021-06-21 13:12:25 +0800 | [diff] [blame] | 3266 | pr_info("NET: Unregistered %s protocol family\n", pf_family_names[family]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3267 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3268 | EXPORT_SYMBOL(sock_unregister); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3269 | |
Xin Long | bf2ae2e | 2018-03-10 18:57:50 +0800 | [diff] [blame] | 3270 | bool sock_is_registered(int family) |
| 3271 | { |
Jeremy Cline | 66b51b0 | 2018-08-13 22:23:13 +0000 | [diff] [blame] | 3272 | return family < NPROTO && rcu_access_pointer(net_families[family]); |
Xin Long | bf2ae2e | 2018-03-10 18:57:50 +0800 | [diff] [blame] | 3273 | } |
| 3274 | |
Andi Kleen | 77d76ea | 2005-12-22 12:43:42 -0800 | [diff] [blame] | 3275 | static int __init sock_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3276 | { |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 3277 | int err; |
Eric W. Biederman | 2ca794e | 2012-04-19 13:20:32 +0000 | [diff] [blame] | 3278 | /* |
| 3279 | * Initialize the network sysctl infrastructure. |
| 3280 | */ |
| 3281 | err = net_sysctl_init(); |
| 3282 | if (err) |
| 3283 | goto out; |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 3284 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3285 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3286 | * Initialize skbuff SLAB cache |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3287 | */ |
| 3288 | skb_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3289 | |
| 3290 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3291 | * Initialize the protocols module. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3292 | */ |
| 3293 | |
| 3294 | init_inodecache(); |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 3295 | |
| 3296 | err = register_filesystem(&sock_fs_type); |
| 3297 | if (err) |
Miaohe Lin | 47260ba | 2020-08-06 19:54:19 +0800 | [diff] [blame] | 3298 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3299 | sock_mnt = kern_mount(&sock_fs_type); |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 3300 | if (IS_ERR(sock_mnt)) { |
| 3301 | err = PTR_ERR(sock_mnt); |
| 3302 | goto out_mount; |
| 3303 | } |
Andi Kleen | 77d76ea | 2005-12-22 12:43:42 -0800 | [diff] [blame] | 3304 | |
| 3305 | /* The real protocol initialization is performed in later initcalls. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3306 | */ |
| 3307 | |
| 3308 | #ifdef CONFIG_NETFILTER |
Pablo Neira Ayuso | 6d11cfd | 2013-05-22 22:42:36 +0000 | [diff] [blame] | 3309 | err = netfilter_init(); |
| 3310 | if (err) |
| 3311 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3312 | #endif |
David S. Miller | cbeb321 | 2005-12-22 12:58:55 -0800 | [diff] [blame] | 3313 | |
Daniel Borkmann | 408eccc | 2014-04-01 16:20:23 +0200 | [diff] [blame] | 3314 | ptp_classifier_init(); |
Richard Cochran | c1f19b5 | 2010-07-17 08:49:36 +0000 | [diff] [blame] | 3315 | |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 3316 | out: |
| 3317 | return err; |
| 3318 | |
| 3319 | out_mount: |
| 3320 | unregister_filesystem(&sock_fs_type); |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 3321 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3322 | } |
| 3323 | |
Andi Kleen | 77d76ea | 2005-12-22 12:43:42 -0800 | [diff] [blame] | 3324 | core_initcall(sock_init); /* early initcall */ |
| 3325 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3326 | #ifdef CONFIG_PROC_FS |
| 3327 | void socket_seq_show(struct seq_file *seq) |
| 3328 | { |
Tonghao Zhang | 648845a | 2017-12-14 05:51:58 -0800 | [diff] [blame] | 3329 | seq_printf(seq, "sockets: used %d\n", |
| 3330 | sock_inuse_get(seq->private)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3331 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3332 | #endif /* CONFIG_PROC_FS */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3333 | |
Arnd Bergmann | 29c4964 | 2021-07-22 16:29:03 +0200 | [diff] [blame] | 3334 | /* Handle the fact that while struct ifreq has the same *layout* on |
| 3335 | * 32/64 for everything but ifreq::ifru_ifmap and ifreq::ifru_data, |
| 3336 | * which are handled elsewhere, it still has different *size* due to |
| 3337 | * ifreq::ifru_ifmap (which is 16 bytes on 32 bit, 24 bytes on 64-bit, |
| 3338 | * resulting in struct ifreq being 32 and 40 bytes respectively). |
| 3339 | * As a result, if the struct happens to be at the end of a page and |
| 3340 | * the next page isn't readable/writable, we get a fault. To prevent |
| 3341 | * that, copy back and forth to the full size. |
| 3342 | */ |
| 3343 | int get_user_ifreq(struct ifreq *ifr, void __user **ifrdata, void __user *arg) |
| 3344 | { |
| 3345 | if (in_compat_syscall()) { |
| 3346 | struct compat_ifreq *ifr32 = (struct compat_ifreq *)ifr; |
| 3347 | |
| 3348 | memset(ifr, 0, sizeof(*ifr)); |
| 3349 | if (copy_from_user(ifr32, arg, sizeof(*ifr32))) |
| 3350 | return -EFAULT; |
| 3351 | |
| 3352 | if (ifrdata) |
| 3353 | *ifrdata = compat_ptr(ifr32->ifr_data); |
| 3354 | |
| 3355 | return 0; |
| 3356 | } |
| 3357 | |
| 3358 | if (copy_from_user(ifr, arg, sizeof(*ifr))) |
| 3359 | return -EFAULT; |
| 3360 | |
| 3361 | if (ifrdata) |
| 3362 | *ifrdata = ifr->ifr_data; |
| 3363 | |
| 3364 | return 0; |
| 3365 | } |
| 3366 | EXPORT_SYMBOL(get_user_ifreq); |
| 3367 | |
| 3368 | int put_user_ifreq(struct ifreq *ifr, void __user *arg) |
| 3369 | { |
| 3370 | size_t size = sizeof(*ifr); |
| 3371 | |
| 3372 | if (in_compat_syscall()) |
| 3373 | size = sizeof(struct compat_ifreq); |
| 3374 | |
| 3375 | if (copy_to_user(arg, ifr, size)) |
| 3376 | return -EFAULT; |
| 3377 | |
| 3378 | return 0; |
| 3379 | } |
| 3380 | EXPORT_SYMBOL(put_user_ifreq); |
| 3381 | |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 3382 | #ifdef CONFIG_COMPAT |
Arnd Bergmann | 7a50a24 | 2009-11-08 20:57:03 -0800 | [diff] [blame] | 3383 | static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32) |
| 3384 | { |
Arnd Bergmann | 7a50a24 | 2009-11-08 20:57:03 -0800 | [diff] [blame] | 3385 | compat_uptr_t uptr32; |
Al Viro | 44c02a2 | 2017-10-05 12:59:44 -0400 | [diff] [blame] | 3386 | struct ifreq ifr; |
| 3387 | void __user *saved; |
| 3388 | int err; |
Arnd Bergmann | 7a50a24 | 2009-11-08 20:57:03 -0800 | [diff] [blame] | 3389 | |
Arnd Bergmann | 29c4964 | 2021-07-22 16:29:03 +0200 | [diff] [blame] | 3390 | if (get_user_ifreq(&ifr, NULL, uifr32)) |
Arnd Bergmann | 7a50a24 | 2009-11-08 20:57:03 -0800 | [diff] [blame] | 3391 | return -EFAULT; |
| 3392 | |
| 3393 | if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu)) |
| 3394 | return -EFAULT; |
| 3395 | |
Al Viro | 44c02a2 | 2017-10-05 12:59:44 -0400 | [diff] [blame] | 3396 | saved = ifr.ifr_settings.ifs_ifsu.raw_hdlc; |
| 3397 | ifr.ifr_settings.ifs_ifsu.raw_hdlc = compat_ptr(uptr32); |
Arnd Bergmann | 7a50a24 | 2009-11-08 20:57:03 -0800 | [diff] [blame] | 3398 | |
Arnd Bergmann | a554bf9 | 2021-07-27 15:45:12 +0200 | [diff] [blame] | 3399 | err = dev_ioctl(net, SIOCWANDEV, &ifr, NULL, NULL); |
Al Viro | 44c02a2 | 2017-10-05 12:59:44 -0400 | [diff] [blame] | 3400 | if (!err) { |
| 3401 | ifr.ifr_settings.ifs_ifsu.raw_hdlc = saved; |
Arnd Bergmann | 29c4964 | 2021-07-22 16:29:03 +0200 | [diff] [blame] | 3402 | if (put_user_ifreq(&ifr, uifr32)) |
Al Viro | 44c02a2 | 2017-10-05 12:59:44 -0400 | [diff] [blame] | 3403 | err = -EFAULT; |
Joe Perches | ccbd6a5 | 2010-05-14 10:58:26 +0000 | [diff] [blame] | 3404 | } |
Al Viro | 44c02a2 | 2017-10-05 12:59:44 -0400 | [diff] [blame] | 3405 | return err; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3406 | } |
| 3407 | |
Ben Hutchings | 590d469 | 2013-11-18 17:04:13 +0000 | [diff] [blame] | 3408 | /* Handle ioctls that use ifreq::ifr_data and just need struct ifreq converted */ |
| 3409 | static int compat_ifr_data_ioctl(struct net *net, unsigned int cmd, |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3410 | struct compat_ifreq __user *u_ifreq32) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3411 | { |
Al Viro | 44c02a2 | 2017-10-05 12:59:44 -0400 | [diff] [blame] | 3412 | struct ifreq ifreq; |
Arnd Bergmann | a554bf9 | 2021-07-27 15:45:12 +0200 | [diff] [blame] | 3413 | void __user *data; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3414 | |
Peter Collingbourne | d0efb16 | 2021-08-26 12:46:01 -0700 | [diff] [blame] | 3415 | if (!is_socket_ioctl_cmd(cmd)) |
| 3416 | return -ENOTTY; |
Arnd Bergmann | a554bf9 | 2021-07-27 15:45:12 +0200 | [diff] [blame] | 3417 | if (get_user_ifreq(&ifreq, &data, u_ifreq32)) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3418 | return -EFAULT; |
Arnd Bergmann | a554bf9 | 2021-07-27 15:45:12 +0200 | [diff] [blame] | 3419 | ifreq.ifr_data = data; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3420 | |
Arnd Bergmann | a554bf9 | 2021-07-27 15:45:12 +0200 | [diff] [blame] | 3421 | return dev_ioctl(net, cmd, &ifreq, data, NULL); |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 3422 | } |
| 3423 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3424 | static int compat_sock_ioctl_trans(struct file *file, struct socket *sock, |
| 3425 | unsigned int cmd, unsigned long arg) |
| 3426 | { |
| 3427 | void __user *argp = compat_ptr(arg); |
| 3428 | struct sock *sk = sock->sk; |
| 3429 | struct net *net = sock_net(sk); |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 3430 | const struct proto_ops *ops; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3431 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3432 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) |
Arnd Bergmann | 88fc023 | 2021-07-27 15:45:15 +0200 | [diff] [blame] | 3433 | return sock_ioctl(file, cmd, (unsigned long)argp); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3434 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3435 | switch (cmd) { |
Arnd Bergmann | 7a50a24 | 2009-11-08 20:57:03 -0800 | [diff] [blame] | 3436 | case SIOCWANDEV: |
| 3437 | return compat_siocwandev(net, argp); |
Arnd Bergmann | 0768e17 | 2019-04-17 22:56:11 +0200 | [diff] [blame] | 3438 | case SIOCGSTAMP_OLD: |
| 3439 | case SIOCGSTAMPNS_OLD: |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 3440 | ops = READ_ONCE(sock->ops); |
| 3441 | if (!ops->gettstamp) |
Arnd Bergmann | c7cbdbf | 2019-04-17 22:51:48 +0200 | [diff] [blame] | 3442 | return -ENOIOCTLCMD; |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 3443 | return ops->gettstamp(sock, argp, cmd == SIOCGSTAMP_OLD, |
| 3444 | !COMPAT_USE_64BIT_TIME); |
Arnd Bergmann | c7cbdbf | 2019-04-17 22:51:48 +0200 | [diff] [blame] | 3445 | |
Arnd Bergmann | dd98d28 | 2021-07-22 16:28:59 +0200 | [diff] [blame] | 3446 | case SIOCETHTOOL: |
Ben Hutchings | 590d469 | 2013-11-18 17:04:13 +0000 | [diff] [blame] | 3447 | case SIOCBONDSLAVEINFOQUERY: |
| 3448 | case SIOCBONDINFOQUERY: |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 3449 | case SIOCSHWTSTAMP: |
Ben Hutchings | fd468c7 | 2013-11-14 01:19:29 +0000 | [diff] [blame] | 3450 | case SIOCGHWTSTAMP: |
Ben Hutchings | 590d469 | 2013-11-18 17:04:13 +0000 | [diff] [blame] | 3451 | return compat_ifr_data_ioctl(net, cmd, argp); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3452 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3453 | case FIOSETOWN: |
| 3454 | case SIOCSPGRP: |
| 3455 | case FIOGETOWN: |
| 3456 | case SIOCGPGRP: |
| 3457 | case SIOCBRADDBR: |
| 3458 | case SIOCBRDELBR: |
| 3459 | case SIOCGIFVLAN: |
| 3460 | case SIOCSIFVLAN: |
Andrey Vagin | c62cce2 | 2016-10-24 18:29:13 -0700 | [diff] [blame] | 3461 | case SIOCGSKNS: |
Arnd Bergmann | 0768e17 | 2019-04-17 22:56:11 +0200 | [diff] [blame] | 3462 | case SIOCGSTAMP_NEW: |
| 3463 | case SIOCGSTAMPNS_NEW: |
Arnd Bergmann | 876f0bf | 2021-07-22 16:29:02 +0200 | [diff] [blame] | 3464 | case SIOCGIFCONF: |
Remi Pommarel | fd3a459 | 2021-12-24 12:46:40 +0100 | [diff] [blame] | 3465 | case SIOCSIFBR: |
| 3466 | case SIOCGIFBR: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3467 | return sock_ioctl(file, cmd, arg); |
| 3468 | |
| 3469 | case SIOCGIFFLAGS: |
| 3470 | case SIOCSIFFLAGS: |
Arnd Bergmann | 709566d | 2021-07-22 16:29:00 +0200 | [diff] [blame] | 3471 | case SIOCGIFMAP: |
| 3472 | case SIOCSIFMAP: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3473 | case SIOCGIFMETRIC: |
| 3474 | case SIOCSIFMETRIC: |
| 3475 | case SIOCGIFMTU: |
| 3476 | case SIOCSIFMTU: |
| 3477 | case SIOCGIFMEM: |
| 3478 | case SIOCSIFMEM: |
| 3479 | case SIOCGIFHWADDR: |
| 3480 | case SIOCSIFHWADDR: |
| 3481 | case SIOCADDMULTI: |
| 3482 | case SIOCDELMULTI: |
| 3483 | case SIOCGIFINDEX: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3484 | case SIOCGIFADDR: |
| 3485 | case SIOCSIFADDR: |
| 3486 | case SIOCSIFHWBROADCAST: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3487 | case SIOCDIFADDR: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3488 | case SIOCGIFBRDADDR: |
| 3489 | case SIOCSIFBRDADDR: |
| 3490 | case SIOCGIFDSTADDR: |
| 3491 | case SIOCSIFDSTADDR: |
| 3492 | case SIOCGIFNETMASK: |
| 3493 | case SIOCSIFNETMASK: |
| 3494 | case SIOCSIFPFLAGS: |
| 3495 | case SIOCGIFPFLAGS: |
| 3496 | case SIOCGIFTXQLEN: |
| 3497 | case SIOCSIFTXQLEN: |
| 3498 | case SIOCBRADDIF: |
| 3499 | case SIOCBRDELIF: |
Johannes Berg | c6c9fee | 2019-01-25 22:43:19 +0100 | [diff] [blame] | 3500 | case SIOCGIFNAME: |
Arnd Bergmann | 9177efd | 2009-11-06 08:09:09 +0000 | [diff] [blame] | 3501 | case SIOCSIFNAME: |
| 3502 | case SIOCGMIIPHY: |
| 3503 | case SIOCGMIIREG: |
| 3504 | case SIOCSMIIREG: |
Al Viro | f92d4fc | 2017-09-30 19:32:17 -0400 | [diff] [blame] | 3505 | case SIOCBONDENSLAVE: |
| 3506 | case SIOCBONDRELEASE: |
| 3507 | case SIOCBONDSETHWADDR: |
| 3508 | case SIOCBONDCHANGEACTIVE: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3509 | case SIOCSARP: |
| 3510 | case SIOCGARP: |
| 3511 | case SIOCDARP: |
Arnd Bergmann | c7dc504 | 2019-06-03 23:07:12 +0200 | [diff] [blame] | 3512 | case SIOCOUTQ: |
Arnd Bergmann | 9d7bf41 | 2019-06-03 23:06:00 +0200 | [diff] [blame] | 3513 | case SIOCOUTQNSD: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3514 | case SIOCATMARK: |
Johannes Berg | 63ff03a | 2019-01-25 22:43:17 +0100 | [diff] [blame] | 3515 | return sock_do_ioctl(net, sock, cmd, arg); |
Arnd Bergmann | 9177efd | 2009-11-06 08:09:09 +0000 | [diff] [blame] | 3516 | } |
| 3517 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3518 | return -ENOIOCTLCMD; |
| 3519 | } |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3520 | |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 3521 | static long compat_sock_ioctl(struct file *file, unsigned int cmd, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3522 | unsigned long arg) |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 3523 | { |
| 3524 | struct socket *sock = file->private_data; |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 3525 | const struct proto_ops *ops = READ_ONCE(sock->ops); |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 3526 | int ret = -ENOIOCTLCMD; |
David S. Miller | 87de87d | 2008-06-03 09:14:03 -0700 | [diff] [blame] | 3527 | struct sock *sk; |
| 3528 | struct net *net; |
| 3529 | |
| 3530 | sk = sock->sk; |
| 3531 | net = sock_net(sk); |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 3532 | |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 3533 | if (ops->compat_ioctl) |
| 3534 | ret = ops->compat_ioctl(sock, cmd, arg); |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 3535 | |
David S. Miller | 87de87d | 2008-06-03 09:14:03 -0700 | [diff] [blame] | 3536 | if (ret == -ENOIOCTLCMD && |
| 3537 | (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)) |
| 3538 | ret = compat_wext_handle_ioctl(net, cmd, arg); |
| 3539 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3540 | if (ret == -ENOIOCTLCMD) |
| 3541 | ret = compat_sock_ioctl_trans(file, sock, cmd, arg); |
| 3542 | |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 3543 | return ret; |
| 3544 | } |
| 3545 | #endif |
| 3546 | |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 3547 | /** |
| 3548 | * kernel_bind - bind an address to a socket (kernel space) |
| 3549 | * @sock: socket |
| 3550 | * @addr: address |
| 3551 | * @addrlen: length of address |
| 3552 | * |
| 3553 | * Returns 0 or an error. |
| 3554 | */ |
| 3555 | |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3556 | int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen) |
| 3557 | { |
Jordan Rife | c889a99a | 2023-09-21 18:46:42 -0500 | [diff] [blame] | 3558 | struct sockaddr_storage address; |
| 3559 | |
| 3560 | memcpy(&address, addr, addrlen); |
| 3561 | |
| 3562 | return READ_ONCE(sock->ops)->bind(sock, (struct sockaddr *)&address, |
| 3563 | addrlen); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3564 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3565 | EXPORT_SYMBOL(kernel_bind); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3566 | |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 3567 | /** |
| 3568 | * kernel_listen - move socket to listening state (kernel space) |
| 3569 | * @sock: socket |
| 3570 | * @backlog: pending connections queue size |
| 3571 | * |
| 3572 | * Returns 0 or an error. |
| 3573 | */ |
| 3574 | |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3575 | int kernel_listen(struct socket *sock, int backlog) |
| 3576 | { |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 3577 | return READ_ONCE(sock->ops)->listen(sock, backlog); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3578 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3579 | EXPORT_SYMBOL(kernel_listen); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3580 | |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 3581 | /** |
| 3582 | * kernel_accept - accept a connection (kernel space) |
| 3583 | * @sock: listening socket |
| 3584 | * @newsock: new connected socket |
| 3585 | * @flags: flags |
| 3586 | * |
| 3587 | * @flags must be SOCK_CLOEXEC, SOCK_NONBLOCK or 0. |
| 3588 | * If it fails, @newsock is guaranteed to be %NULL. |
| 3589 | * Returns 0 or an error. |
| 3590 | */ |
| 3591 | |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3592 | int kernel_accept(struct socket *sock, struct socket **newsock, int flags) |
| 3593 | { |
| 3594 | struct sock *sk = sock->sk; |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 3595 | const struct proto_ops *ops = READ_ONCE(sock->ops); |
Jens Axboe | 92ef0fd | 2024-05-09 09:20:08 -0600 | [diff] [blame] | 3596 | struct proto_accept_arg arg = { |
| 3597 | .flags = flags, |
| 3598 | .kern = true, |
| 3599 | }; |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3600 | int err; |
| 3601 | |
| 3602 | err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol, |
| 3603 | newsock); |
| 3604 | if (err < 0) |
| 3605 | goto done; |
| 3606 | |
Jens Axboe | 92ef0fd | 2024-05-09 09:20:08 -0600 | [diff] [blame] | 3607 | err = ops->accept(sock, *newsock, &arg); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3608 | if (err < 0) { |
| 3609 | sock_release(*newsock); |
Tony Battersby | fa8705b | 2007-10-10 21:09:04 -0700 | [diff] [blame] | 3610 | *newsock = NULL; |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3611 | goto done; |
| 3612 | } |
| 3613 | |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 3614 | (*newsock)->ops = ops; |
| 3615 | __module_get(ops->owner); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3616 | |
| 3617 | done: |
| 3618 | return err; |
| 3619 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3620 | EXPORT_SYMBOL(kernel_accept); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3621 | |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 3622 | /** |
| 3623 | * kernel_connect - connect a socket (kernel space) |
| 3624 | * @sock: socket |
| 3625 | * @addr: address |
| 3626 | * @addrlen: address length |
| 3627 | * @flags: flags (O_NONBLOCK, ...) |
| 3628 | * |
Lu Wei | f1dcffc | 2021-03-25 11:01:55 +0800 | [diff] [blame] | 3629 | * For datagram sockets, @addr is the address to which datagrams are sent |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 3630 | * by default, and the only address from which datagrams are received. |
| 3631 | * For stream sockets, attempts to connect to @addr. |
| 3632 | * Returns 0 or an error code. |
| 3633 | */ |
| 3634 | |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3635 | int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, |
YOSHIFUJI Hideaki | 4768fbc | 2007-02-09 23:25:31 +0900 | [diff] [blame] | 3636 | int flags) |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3637 | { |
Jordan Rife | 0bdf399 | 2023-08-21 16:45:23 -0500 | [diff] [blame] | 3638 | struct sockaddr_storage address; |
| 3639 | |
| 3640 | memcpy(&address, addr, addrlen); |
| 3641 | |
| 3642 | return READ_ONCE(sock->ops)->connect(sock, (struct sockaddr *)&address, |
| 3643 | addrlen, flags); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3644 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3645 | EXPORT_SYMBOL(kernel_connect); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3646 | |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 3647 | /** |
| 3648 | * kernel_getsockname - get the address which the socket is bound (kernel space) |
| 3649 | * @sock: socket |
| 3650 | * @addr: address holder |
| 3651 | * |
| 3652 | * Fills the @addr pointer with the address which the socket is bound. |
Alex Maydanik | 0fc95de | 2022-02-12 12:29:27 +0200 | [diff] [blame] | 3653 | * Returns the length of the address in bytes or an error code. |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 3654 | */ |
| 3655 | |
Denys Vlasenko | 9b2c45d | 2018-02-12 20:00:20 +0100 | [diff] [blame] | 3656 | int kernel_getsockname(struct socket *sock, struct sockaddr *addr) |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3657 | { |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 3658 | return READ_ONCE(sock->ops)->getname(sock, addr, 0); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3659 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3660 | EXPORT_SYMBOL(kernel_getsockname); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3661 | |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 3662 | /** |
Miaohe Lin | 645f089 | 2020-08-27 07:27:49 -0400 | [diff] [blame] | 3663 | * kernel_getpeername - get the address which the socket is connected (kernel space) |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 3664 | * @sock: socket |
| 3665 | * @addr: address holder |
| 3666 | * |
| 3667 | * Fills the @addr pointer with the address which the socket is connected. |
Alex Maydanik | 0fc95de | 2022-02-12 12:29:27 +0200 | [diff] [blame] | 3668 | * Returns the length of the address in bytes or an error code. |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 3669 | */ |
| 3670 | |
Denys Vlasenko | 9b2c45d | 2018-02-12 20:00:20 +0100 | [diff] [blame] | 3671 | int kernel_getpeername(struct socket *sock, struct sockaddr *addr) |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3672 | { |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 3673 | return READ_ONCE(sock->ops)->getname(sock, addr, 1); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3674 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3675 | EXPORT_SYMBOL(kernel_getpeername); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3676 | |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 3677 | /** |
Miaohe Lin | 645f089 | 2020-08-27 07:27:49 -0400 | [diff] [blame] | 3678 | * kernel_sock_shutdown - shut down part of a full-duplex connection (kernel space) |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 3679 | * @sock: socket |
| 3680 | * @how: connection part |
| 3681 | * |
| 3682 | * Returns 0 or an error. |
| 3683 | */ |
| 3684 | |
Trond Myklebust | 91cf45f | 2007-11-12 18:10:39 -0800 | [diff] [blame] | 3685 | int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how) |
| 3686 | { |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 3687 | return READ_ONCE(sock->ops)->shutdown(sock, how); |
Trond Myklebust | 91cf45f | 2007-11-12 18:10:39 -0800 | [diff] [blame] | 3688 | } |
Trond Myklebust | 91cf45f | 2007-11-12 18:10:39 -0800 | [diff] [blame] | 3689 | EXPORT_SYMBOL(kernel_sock_shutdown); |
R. Parameswaran | 113c307 | 2017-04-05 16:50:35 -0700 | [diff] [blame] | 3690 | |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 3691 | /** |
| 3692 | * kernel_sock_ip_overhead - returns the IP overhead imposed by a socket |
| 3693 | * @sk: socket |
| 3694 | * |
| 3695 | * This routine returns the IP overhead imposed by a socket i.e. |
| 3696 | * the length of the underlying IP header, depending on whether |
| 3697 | * this is an IPv4 or IPv6 socket and the length from IP options turned |
| 3698 | * on at the socket. Assumes that the caller has a lock on the socket. |
R. Parameswaran | 113c307 | 2017-04-05 16:50:35 -0700 | [diff] [blame] | 3699 | */ |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 3700 | |
R. Parameswaran | 113c307 | 2017-04-05 16:50:35 -0700 | [diff] [blame] | 3701 | u32 kernel_sock_ip_overhead(struct sock *sk) |
| 3702 | { |
| 3703 | struct inet_sock *inet; |
| 3704 | struct ip_options_rcu *opt; |
| 3705 | u32 overhead = 0; |
R. Parameswaran | 113c307 | 2017-04-05 16:50:35 -0700 | [diff] [blame] | 3706 | #if IS_ENABLED(CONFIG_IPV6) |
| 3707 | struct ipv6_pinfo *np; |
| 3708 | struct ipv6_txoptions *optv6 = NULL; |
| 3709 | #endif /* IS_ENABLED(CONFIG_IPV6) */ |
| 3710 | |
| 3711 | if (!sk) |
| 3712 | return overhead; |
| 3713 | |
R. Parameswaran | 113c307 | 2017-04-05 16:50:35 -0700 | [diff] [blame] | 3714 | switch (sk->sk_family) { |
| 3715 | case AF_INET: |
| 3716 | inet = inet_sk(sk); |
| 3717 | overhead += sizeof(struct iphdr); |
| 3718 | opt = rcu_dereference_protected(inet->inet_opt, |
stephen hemminger | 614d79c | 2017-07-24 10:25:22 -0700 | [diff] [blame] | 3719 | sock_owned_by_user(sk)); |
R. Parameswaran | 113c307 | 2017-04-05 16:50:35 -0700 | [diff] [blame] | 3720 | if (opt) |
| 3721 | overhead += opt->opt.optlen; |
| 3722 | return overhead; |
| 3723 | #if IS_ENABLED(CONFIG_IPV6) |
| 3724 | case AF_INET6: |
| 3725 | np = inet6_sk(sk); |
| 3726 | overhead += sizeof(struct ipv6hdr); |
| 3727 | if (np) |
| 3728 | optv6 = rcu_dereference_protected(np->opt, |
stephen hemminger | 614d79c | 2017-07-24 10:25:22 -0700 | [diff] [blame] | 3729 | sock_owned_by_user(sk)); |
R. Parameswaran | 113c307 | 2017-04-05 16:50:35 -0700 | [diff] [blame] | 3730 | if (optv6) |
| 3731 | overhead += (optv6->opt_flen + optv6->opt_nflen); |
| 3732 | return overhead; |
| 3733 | #endif /* IS_ENABLED(CONFIG_IPV6) */ |
| 3734 | default: /* Returns 0 overhead if the socket is not ipv4 or ipv6 */ |
| 3735 | return overhead; |
| 3736 | } |
| 3737 | } |
| 3738 | EXPORT_SYMBOL(kernel_sock_ip_overhead); |