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> |
Breno Leitao | 8e9fad0 | 2023-06-27 06:44:24 -0700 | [diff] [blame] | 91 | #include <linux/io_uring.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 | |
Vladimir Davydov | 5d09705 | 2016-01-14 15:18:21 -0800 | [diff] [blame] | 346 | SLAB_MEM_SPREAD | 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; |
| 760 | int ret; |
Ying Xue | 1b78414 | 2015-03-02 15:37:48 +0800 | [diff] [blame] | 761 | |
Jordan Rife | 86a7e0b | 2023-09-21 18:46:41 -0500 | [diff] [blame] | 762 | if (msg->msg_name) { |
| 763 | memcpy(&address, msg->msg_name, msg->msg_namelen); |
| 764 | msg->msg_name = &address; |
| 765 | } |
| 766 | |
| 767 | ret = __sock_sendmsg(sock, msg); |
| 768 | msg->msg_name = save_addr; |
| 769 | |
| 770 | return ret; |
Gu Zheng | 0cf00c6 | 2014-12-05 15:14:23 +0800 | [diff] [blame] | 771 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 772 | EXPORT_SYMBOL(sock_sendmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 774 | /** |
| 775 | * kernel_sendmsg - send a message through @sock (kernel-space) |
| 776 | * @sock: socket |
| 777 | * @msg: message header |
| 778 | * @vec: kernel vec |
| 779 | * @num: vec array length |
| 780 | * @size: total message data size |
| 781 | * |
| 782 | * Builds the message data with @vec and sends it through @sock. |
| 783 | * Returns the number of bytes sent, or an error code. |
| 784 | */ |
| 785 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | int kernel_sendmsg(struct socket *sock, struct msghdr *msg, |
| 787 | struct kvec *vec, size_t num, size_t size) |
| 788 | { |
Al Viro | de4eda9 | 2022-09-15 20:25:47 -0400 | [diff] [blame] | 789 | iov_iter_kvec(&msg->msg_iter, ITER_SOURCE, vec, num, size); |
Al Viro | d8725c8 | 2014-12-11 00:02:50 -0500 | [diff] [blame] | 790 | return sock_sendmsg(sock, msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 792 | EXPORT_SYMBOL(kernel_sendmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 794 | /** |
| 795 | * kernel_sendmsg_locked - send a message through @sock (kernel-space) |
| 796 | * @sk: sock |
| 797 | * @msg: message header |
| 798 | * @vec: output s/g array |
| 799 | * @num: output s/g array length |
| 800 | * @size: total message data size |
| 801 | * |
| 802 | * Builds the message data with @vec and sends it through @sock. |
| 803 | * Returns the number of bytes sent, or an error code. |
| 804 | * Caller must hold @sk. |
| 805 | */ |
| 806 | |
Tom Herbert | 306b13e | 2017-07-28 16:22:41 -0700 | [diff] [blame] | 807 | int kernel_sendmsg_locked(struct sock *sk, struct msghdr *msg, |
| 808 | struct kvec *vec, size_t num, size_t size) |
| 809 | { |
| 810 | struct socket *sock = sk->sk_socket; |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 811 | const struct proto_ops *ops = READ_ONCE(sock->ops); |
Tom Herbert | 306b13e | 2017-07-28 16:22:41 -0700 | [diff] [blame] | 812 | |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 813 | if (!ops->sendmsg_locked) |
John Fastabend | db5980d | 2017-08-15 22:31:34 -0700 | [diff] [blame] | 814 | return sock_no_sendmsg_locked(sk, msg, size); |
Tom Herbert | 306b13e | 2017-07-28 16:22:41 -0700 | [diff] [blame] | 815 | |
Al Viro | de4eda9 | 2022-09-15 20:25:47 -0400 | [diff] [blame] | 816 | iov_iter_kvec(&msg->msg_iter, ITER_SOURCE, vec, num, size); |
Tom Herbert | 306b13e | 2017-07-28 16:22:41 -0700 | [diff] [blame] | 817 | |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 818 | return ops->sendmsg_locked(sk, msg, msg_data_left(msg)); |
Tom Herbert | 306b13e | 2017-07-28 16:22:41 -0700 | [diff] [blame] | 819 | } |
| 820 | EXPORT_SYMBOL(kernel_sendmsg_locked); |
| 821 | |
Soheil Hassas Yeganeh | 8605330a | 2017-03-18 17:02:59 -0400 | [diff] [blame] | 822 | static bool skb_is_err_queue(const struct sk_buff *skb) |
| 823 | { |
| 824 | /* pkt_type of skbs enqueued on the error queue are set to |
| 825 | * PACKET_OUTGOING in skb_set_err_queue(). This is only safe to do |
| 826 | * in recvmsg, since skbs received on a local socket will never |
| 827 | * have a pkt_type of PACKET_OUTGOING. |
| 828 | */ |
| 829 | return skb->pkt_type == PACKET_OUTGOING; |
| 830 | } |
| 831 | |
Miroslav Lichvar | b50a5c7 | 2017-05-19 17:52:40 +0200 | [diff] [blame] | 832 | /* On transmit, software and hardware timestamps are returned independently. |
| 833 | * As the two skb clones share the hardware timestamp, which may be updated |
| 834 | * before the software timestamp is received, a hardware TX timestamp may be |
| 835 | * returned only if there is no software TX timestamp. Ignore false software |
| 836 | * 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] | 837 | * 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] | 838 | * hardware timestamp. |
| 839 | */ |
| 840 | static bool skb_is_swtx_tstamp(const struct sk_buff *skb, int false_tstamp) |
| 841 | { |
| 842 | return skb->tstamp && !false_tstamp && skb_is_err_queue(skb); |
| 843 | } |
| 844 | |
Gerhard Engleder | 97dc7cd | 2022-05-06 22:01:40 +0200 | [diff] [blame] | 845 | static ktime_t get_timestamp(struct sock *sk, struct sk_buff *skb, int *if_index) |
| 846 | { |
Eric Dumazet | e3390b3 | 2023-08-31 13:52:11 +0000 | [diff] [blame] | 847 | bool cycles = READ_ONCE(sk->sk_tsflags) & SOF_TIMESTAMPING_BIND_PHC; |
Gerhard Engleder | 97dc7cd | 2022-05-06 22:01:40 +0200 | [diff] [blame] | 848 | struct skb_shared_hwtstamps *shhwtstamps = skb_hwtstamps(skb); |
| 849 | struct net_device *orig_dev; |
| 850 | ktime_t hwtstamp; |
| 851 | |
| 852 | rcu_read_lock(); |
| 853 | orig_dev = dev_get_by_napi_id(skb_napi_id(skb)); |
| 854 | if (orig_dev) { |
| 855 | *if_index = orig_dev->ifindex; |
| 856 | hwtstamp = netdev_get_tstamp(orig_dev, shhwtstamps, cycles); |
| 857 | } else { |
| 858 | hwtstamp = shhwtstamps->hwtstamp; |
| 859 | } |
| 860 | rcu_read_unlock(); |
| 861 | |
| 862 | return hwtstamp; |
| 863 | } |
| 864 | |
| 865 | static void put_ts_pktinfo(struct msghdr *msg, struct sk_buff *skb, |
| 866 | int if_index) |
Miroslav Lichvar | aad9c8c | 2017-05-19 17:52:38 +0200 | [diff] [blame] | 867 | { |
| 868 | struct scm_ts_pktinfo ts_pktinfo; |
| 869 | struct net_device *orig_dev; |
| 870 | |
| 871 | if (!skb_mac_header_was_set(skb)) |
| 872 | return; |
| 873 | |
| 874 | memset(&ts_pktinfo, 0, sizeof(ts_pktinfo)); |
| 875 | |
Gerhard Engleder | 97dc7cd | 2022-05-06 22:01:40 +0200 | [diff] [blame] | 876 | if (!if_index) { |
| 877 | rcu_read_lock(); |
| 878 | orig_dev = dev_get_by_napi_id(skb_napi_id(skb)); |
| 879 | if (orig_dev) |
| 880 | if_index = orig_dev->ifindex; |
| 881 | rcu_read_unlock(); |
| 882 | } |
| 883 | ts_pktinfo.if_index = if_index; |
Miroslav Lichvar | aad9c8c | 2017-05-19 17:52:38 +0200 | [diff] [blame] | 884 | |
| 885 | ts_pktinfo.pkt_length = skb->len - skb_mac_offset(skb); |
| 886 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPING_PKTINFO, |
| 887 | sizeof(ts_pktinfo), &ts_pktinfo); |
| 888 | } |
| 889 | |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 890 | /* |
| 891 | * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP) |
| 892 | */ |
| 893 | void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, |
| 894 | struct sk_buff *skb) |
| 895 | { |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 896 | int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP); |
Deepa Dinamani | 887feae | 2019-02-02 07:34:50 -0800 | [diff] [blame] | 897 | int new_tstamp = sock_flag(sk, SOCK_TSTAMP_NEW); |
Deepa Dinamani | 9718475 | 2019-02-02 07:34:51 -0800 | [diff] [blame] | 898 | struct scm_timestamping_internal tss; |
Miroslav Lichvar | b50a5c7 | 2017-05-19 17:52:40 +0200 | [diff] [blame] | 899 | int empty = 1, false_tstamp = 0; |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 900 | struct skb_shared_hwtstamps *shhwtstamps = |
| 901 | skb_hwtstamps(skb); |
Gerhard Engleder | 97dc7cd | 2022-05-06 22:01:40 +0200 | [diff] [blame] | 902 | int if_index; |
Miroslav Lichvar | 007747a9 | 2022-01-05 11:33:26 +0100 | [diff] [blame] | 903 | ktime_t hwtstamp; |
Eric Dumazet | e3390b3 | 2023-08-31 13:52:11 +0000 | [diff] [blame] | 904 | u32 tsflags; |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 905 | |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 906 | /* Race occurred between timestamp enabling and packet |
| 907 | receiving. Fill in the current time for now. */ |
Miroslav Lichvar | b50a5c7 | 2017-05-19 17:52:40 +0200 | [diff] [blame] | 908 | if (need_software_tstamp && skb->tstamp == 0) { |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 909 | __net_timestamp(skb); |
Miroslav Lichvar | b50a5c7 | 2017-05-19 17:52:40 +0200 | [diff] [blame] | 910 | false_tstamp = 1; |
| 911 | } |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 912 | |
| 913 | if (need_software_tstamp) { |
| 914 | if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { |
Deepa Dinamani | 887feae | 2019-02-02 07:34:50 -0800 | [diff] [blame] | 915 | if (new_tstamp) { |
| 916 | struct __kernel_sock_timeval tv; |
| 917 | |
| 918 | skb_get_new_timestamp(skb, &tv); |
| 919 | put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMP_NEW, |
| 920 | sizeof(tv), &tv); |
| 921 | } else { |
| 922 | struct __kernel_old_timeval tv; |
| 923 | |
| 924 | skb_get_timestamp(skb, &tv); |
| 925 | put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMP_OLD, |
| 926 | sizeof(tv), &tv); |
| 927 | } |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 928 | } else { |
Deepa Dinamani | 887feae | 2019-02-02 07:34:50 -0800 | [diff] [blame] | 929 | if (new_tstamp) { |
| 930 | struct __kernel_timespec ts; |
| 931 | |
| 932 | skb_get_new_timestampns(skb, &ts); |
| 933 | put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMPNS_NEW, |
| 934 | sizeof(ts), &ts); |
| 935 | } else { |
Arnd Bergmann | df1b4ba | 2019-10-25 22:04:46 +0200 | [diff] [blame] | 936 | struct __kernel_old_timespec ts; |
Deepa Dinamani | 887feae | 2019-02-02 07:34:50 -0800 | [diff] [blame] | 937 | |
| 938 | skb_get_timestampns(skb, &ts); |
| 939 | put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMPNS_OLD, |
| 940 | sizeof(ts), &ts); |
| 941 | } |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 942 | } |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 943 | } |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 944 | |
Willem de Bruijn | f24b9be | 2014-08-04 22:11:45 -0400 | [diff] [blame] | 945 | memset(&tss, 0, sizeof(tss)); |
Eric Dumazet | e3390b3 | 2023-08-31 13:52:11 +0000 | [diff] [blame] | 946 | tsflags = READ_ONCE(sk->sk_tsflags); |
| 947 | if ((tsflags & SOF_TIMESTAMPING_SOFTWARE) && |
Deepa Dinamani | 9718475 | 2019-02-02 07:34:51 -0800 | [diff] [blame] | 948 | ktime_to_timespec64_cond(skb->tstamp, tss.ts + 0)) |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 949 | empty = 0; |
Willem de Bruijn | 4d276eb | 2014-07-25 18:01:32 -0400 | [diff] [blame] | 950 | if (shhwtstamps && |
Eric Dumazet | e3390b3 | 2023-08-31 13:52:11 +0000 | [diff] [blame] | 951 | (tsflags & SOF_TIMESTAMPING_RAW_HARDWARE) && |
Yangbo Lu | d7c0882 | 2021-06-30 16:12:00 +0800 | [diff] [blame] | 952 | !skb_is_swtx_tstamp(skb, false_tstamp)) { |
Gerhard Engleder | 97dc7cd | 2022-05-06 22:01:40 +0200 | [diff] [blame] | 953 | if_index = 0; |
| 954 | if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP_NETDEV) |
| 955 | hwtstamp = get_timestamp(sk, skb, &if_index); |
Miroslav Lichvar | 007747a9 | 2022-01-05 11:33:26 +0100 | [diff] [blame] | 956 | else |
| 957 | hwtstamp = shhwtstamps->hwtstamp; |
Yangbo Lu | d7c0882 | 2021-06-30 16:12:00 +0800 | [diff] [blame] | 958 | |
Eric Dumazet | e3390b3 | 2023-08-31 13:52:11 +0000 | [diff] [blame] | 959 | if (tsflags & SOF_TIMESTAMPING_BIND_PHC) |
Gerhard Engleder | 97dc7cd | 2022-05-06 22:01:40 +0200 | [diff] [blame] | 960 | hwtstamp = ptp_convert_timestamp(&hwtstamp, |
Eric Dumazet | 251cd40 | 2023-08-31 13:52:12 +0000 | [diff] [blame] | 961 | READ_ONCE(sk->sk_bind_phc)); |
Gerhard Engleder | 97dc7cd | 2022-05-06 22:01:40 +0200 | [diff] [blame] | 962 | |
Miroslav Lichvar | 007747a9 | 2022-01-05 11:33:26 +0100 | [diff] [blame] | 963 | if (ktime_to_timespec64_cond(hwtstamp, tss.ts + 2)) { |
Yangbo Lu | d7c0882 | 2021-06-30 16:12:00 +0800 | [diff] [blame] | 964 | empty = 0; |
| 965 | |
Eric Dumazet | e3390b3 | 2023-08-31 13:52:11 +0000 | [diff] [blame] | 966 | if ((tsflags & SOF_TIMESTAMPING_OPT_PKTINFO) && |
Yangbo Lu | d7c0882 | 2021-06-30 16:12:00 +0800 | [diff] [blame] | 967 | !skb_is_err_queue(skb)) |
Gerhard Engleder | 97dc7cd | 2022-05-06 22:01:40 +0200 | [diff] [blame] | 968 | put_ts_pktinfo(msg, skb, if_index); |
Yangbo Lu | d7c0882 | 2021-06-30 16:12:00 +0800 | [diff] [blame] | 969 | } |
Miroslav Lichvar | aad9c8c | 2017-05-19 17:52:38 +0200 | [diff] [blame] | 970 | } |
Francis Yan | 1c88580 | 2016-11-27 23:07:18 -0800 | [diff] [blame] | 971 | if (!empty) { |
Deepa Dinamani | 9718475 | 2019-02-02 07:34:51 -0800 | [diff] [blame] | 972 | if (sock_flag(sk, SOCK_TSTAMP_NEW)) |
| 973 | put_cmsg_scm_timestamping64(msg, &tss); |
| 974 | else |
| 975 | put_cmsg_scm_timestamping(msg, &tss); |
Francis Yan | 1c88580 | 2016-11-27 23:07:18 -0800 | [diff] [blame] | 976 | |
Soheil Hassas Yeganeh | 8605330a | 2017-03-18 17:02:59 -0400 | [diff] [blame] | 977 | if (skb_is_err_queue(skb) && skb->len && |
Soheil Hassas Yeganeh | 4ef1b28 | 2017-03-18 17:03:00 -0400 | [diff] [blame] | 978 | SKB_EXT_ERR(skb)->opt_stats) |
Francis Yan | 1c88580 | 2016-11-27 23:07:18 -0800 | [diff] [blame] | 979 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPING_OPT_STATS, |
| 980 | skb->len, skb->data); |
| 981 | } |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 982 | } |
Arnaldo Carvalho de Melo | 7c81fd8 | 2007-03-10 00:39:35 -0300 | [diff] [blame] | 983 | EXPORT_SYMBOL_GPL(__sock_recv_timestamp); |
| 984 | |
Jakub Kicinski | eb6fba7 | 2023-04-17 08:53:46 -0700 | [diff] [blame] | 985 | #ifdef CONFIG_WIRELESS |
Johannes Berg | 6e3e939 | 2011-11-09 10:15:42 +0100 | [diff] [blame] | 986 | void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk, |
| 987 | struct sk_buff *skb) |
| 988 | { |
| 989 | int ack; |
| 990 | |
| 991 | if (!sock_flag(sk, SOCK_WIFI_STATUS)) |
| 992 | return; |
| 993 | if (!skb->wifi_acked_valid) |
| 994 | return; |
| 995 | |
| 996 | ack = skb->wifi_acked; |
| 997 | |
| 998 | put_cmsg(msg, SOL_SOCKET, SCM_WIFI_STATUS, sizeof(ack), &ack); |
| 999 | } |
| 1000 | EXPORT_SYMBOL_GPL(__sock_recv_wifi_status); |
Jakub Kicinski | eb6fba7 | 2023-04-17 08:53:46 -0700 | [diff] [blame] | 1001 | #endif |
Johannes Berg | 6e3e939 | 2011-11-09 10:15:42 +0100 | [diff] [blame] | 1002 | |
stephen hemminger | 11165f1 | 2010-10-18 14:27:29 +0000 | [diff] [blame] | 1003 | static inline void sock_recv_drops(struct msghdr *msg, struct sock *sk, |
| 1004 | struct sk_buff *skb) |
Neil Horman | 3b88578 | 2009-10-12 13:26:31 -0700 | [diff] [blame] | 1005 | { |
Eyal Birger | 744d5a3 | 2015-03-01 14:58:31 +0200 | [diff] [blame] | 1006 | 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] | 1007 | put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL, |
Eyal Birger | 744d5a3 | 2015-03-01 14:58:31 +0200 | [diff] [blame] | 1008 | sizeof(__u32), &SOCK_SKB_CB(skb)->dropcount); |
Neil Horman | 3b88578 | 2009-10-12 13:26:31 -0700 | [diff] [blame] | 1009 | } |
| 1010 | |
Erin MacNeil | 6fd1d51 | 2022-04-27 16:02:37 -0400 | [diff] [blame] | 1011 | static void sock_recv_mark(struct msghdr *msg, struct sock *sk, |
| 1012 | struct sk_buff *skb) |
| 1013 | { |
Eric Dumazet | 2558b80 | 2023-02-13 16:00:59 +0000 | [diff] [blame] | 1014 | if (sock_flag(sk, SOCK_RCVMARK) && skb) { |
| 1015 | /* We must use a bounce buffer for CONFIG_HARDENED_USERCOPY=y */ |
| 1016 | __u32 mark = skb->mark; |
| 1017 | |
| 1018 | put_cmsg(msg, SOL_SOCKET, SO_MARK, sizeof(__u32), &mark); |
| 1019 | } |
Erin MacNeil | 6fd1d51 | 2022-04-27 16:02:37 -0400 | [diff] [blame] | 1020 | } |
| 1021 | |
| 1022 | void __sock_recv_cmsgs(struct msghdr *msg, struct sock *sk, |
| 1023 | struct sk_buff *skb) |
Neil Horman | 3b88578 | 2009-10-12 13:26:31 -0700 | [diff] [blame] | 1024 | { |
| 1025 | sock_recv_timestamp(msg, sk, skb); |
| 1026 | sock_recv_drops(msg, sk, skb); |
Erin MacNeil | 6fd1d51 | 2022-04-27 16:02:37 -0400 | [diff] [blame] | 1027 | sock_recv_mark(msg, sk, skb); |
Neil Horman | 3b88578 | 2009-10-12 13:26:31 -0700 | [diff] [blame] | 1028 | } |
Erin MacNeil | 6fd1d51 | 2022-04-27 16:02:37 -0400 | [diff] [blame] | 1029 | EXPORT_SYMBOL_GPL(__sock_recv_cmsgs); |
Neil Horman | 3b88578 | 2009-10-12 13:26:31 -0700 | [diff] [blame] | 1030 | |
Paolo Abeni | 8c3c447 | 2019-05-03 17:01:39 +0200 | [diff] [blame] | 1031 | INDIRECT_CALLABLE_DECLARE(int inet_recvmsg(struct socket *, struct msghdr *, |
Paolo Abeni | a648a59 | 2019-07-03 16:06:54 +0200 | [diff] [blame] | 1032 | size_t, int)); |
| 1033 | INDIRECT_CALLABLE_DECLARE(int inet6_recvmsg(struct socket *, struct msghdr *, |
| 1034 | size_t, int)); |
Yunhui Cui | 6e6eda4 | 2023-01-11 14:59:30 +0800 | [diff] [blame] | 1035 | |
| 1036 | static noinline void call_trace_sock_recv_length(struct sock *sk, int ret, int flags) |
| 1037 | { |
| 1038 | trace_sock_recv_length(sk, ret, flags); |
| 1039 | } |
| 1040 | |
Ying Xue | 1b78414 | 2015-03-02 15:37:48 +0800 | [diff] [blame] | 1041 | static inline int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg, |
Al Viro | 2da6290 | 2015-03-14 21:13:46 -0400 | [diff] [blame] | 1042 | int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | { |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1044 | int ret = INDIRECT_CALL_INET(READ_ONCE(sock->ops)->recvmsg, |
| 1045 | inet6_recvmsg, |
Yunhui Cui | 6e6eda4 | 2023-01-11 14:59:30 +0800 | [diff] [blame] | 1046 | inet_recvmsg, sock, msg, |
| 1047 | msg_data_left(msg), flags); |
| 1048 | if (trace_sock_recv_length_enabled()) |
| 1049 | call_trace_sock_recv_length(sock->sk, ret, flags); |
| 1050 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | } |
| 1052 | |
Randy Dunlap | 85806af | 2019-05-18 21:23:07 -0700 | [diff] [blame] | 1053 | /** |
| 1054 | * sock_recvmsg - receive a message from @sock |
| 1055 | * @sock: socket |
| 1056 | * @msg: message to receive |
| 1057 | * @flags: message flags |
| 1058 | * |
| 1059 | * Receives @msg from @sock, passing through LSM. Returns the total number |
| 1060 | * of bytes received, or an error. |
| 1061 | */ |
Al Viro | 2da6290 | 2015-03-14 21:13:46 -0400 | [diff] [blame] | 1062 | 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] | 1063 | { |
Al Viro | 2da6290 | 2015-03-14 21:13:46 -0400 | [diff] [blame] | 1064 | 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] | 1065 | |
Al Viro | 2da6290 | 2015-03-14 21:13:46 -0400 | [diff] [blame] | 1066 | return err ?: sock_recvmsg_nosec(sock, msg, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1068 | EXPORT_SYMBOL(sock_recvmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1069 | |
Martin Lucina | c1249c0 | 2010-12-10 00:04:05 +0000 | [diff] [blame] | 1070 | /** |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 1071 | * kernel_recvmsg - Receive a message from a socket (kernel space) |
| 1072 | * @sock: The socket to receive the message from |
| 1073 | * @msg: Received message |
| 1074 | * @vec: Input s/g array for message data |
| 1075 | * @num: Size of input s/g array |
| 1076 | * @size: Number of bytes to read |
| 1077 | * @flags: Message flags (MSG_DONTWAIT, etc...) |
Martin Lucina | c1249c0 | 2010-12-10 00:04:05 +0000 | [diff] [blame] | 1078 | * |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 1079 | * On return the msg structure contains the scatter/gather array passed in the |
| 1080 | * vec argument. The array is modified so that it consists of the unfilled |
| 1081 | * portion of the original array. |
Martin Lucina | c1249c0 | 2010-12-10 00:04:05 +0000 | [diff] [blame] | 1082 | * |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 1083 | * 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] | 1084 | */ |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 1085 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1086 | int kernel_recvmsg(struct socket *sock, struct msghdr *msg, |
| 1087 | struct kvec *vec, size_t num, size_t size, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | { |
Christoph Hellwig | 1f466e1 | 2020-05-11 13:59:13 +0200 | [diff] [blame] | 1089 | msg->msg_control_is_user = false; |
Al Viro | de4eda9 | 2022-09-15 20:25:47 -0400 | [diff] [blame] | 1090 | iov_iter_kvec(&msg->msg_iter, ITER_DEST, vec, num, size); |
Christoph Hellwig | 1f466e1 | 2020-05-11 13:59:13 +0200 | [diff] [blame] | 1091 | return sock_recvmsg(sock, msg, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1092 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1093 | EXPORT_SYMBOL(kernel_recvmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 1095 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1096 | struct pipe_inode_info *pipe, size_t len, |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 1097 | unsigned int flags) |
| 1098 | { |
| 1099 | struct socket *sock = file->private_data; |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1100 | const struct proto_ops *ops; |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 1101 | |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1102 | ops = READ_ONCE(sock->ops); |
| 1103 | if (unlikely(!ops->splice_read)) |
David Howells | 67178fd | 2023-05-22 14:50:00 +0100 | [diff] [blame] | 1104 | return copy_splice_read(file, ppos, pipe, len, flags); |
Rémi Denis-Courmont | 997b37d | 2008-02-15 02:35:45 -0800 | [diff] [blame] | 1105 | |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1106 | return ops->splice_read(sock, ppos, pipe, len, flags); |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 1107 | } |
| 1108 | |
David Howells | 2bfc668 | 2023-06-07 19:19:10 +0100 | [diff] [blame] | 1109 | static void sock_splice_eof(struct file *file) |
| 1110 | { |
| 1111 | struct socket *sock = file->private_data; |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1112 | const struct proto_ops *ops; |
David Howells | 2bfc668 | 2023-06-07 19:19:10 +0100 | [diff] [blame] | 1113 | |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1114 | ops = READ_ONCE(sock->ops); |
| 1115 | if (ops->splice_eof) |
| 1116 | ops->splice_eof(sock); |
David Howells | 2bfc668 | 2023-06-07 19:19:10 +0100 | [diff] [blame] | 1117 | } |
| 1118 | |
Al Viro | 8ae5e030 | 2014-11-28 19:40:50 -0500 | [diff] [blame] | 1119 | 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] | 1120 | { |
Al Viro | 6d65233 | 2015-01-30 16:12:56 -0500 | [diff] [blame] | 1121 | struct file *file = iocb->ki_filp; |
| 1122 | struct socket *sock = file->private_data; |
tadeusz.struk@intel.com | 0345f93 | 2015-03-19 12:31:25 -0700 | [diff] [blame] | 1123 | struct msghdr msg = {.msg_iter = *to, |
| 1124 | .msg_iocb = iocb}; |
Al Viro | 8ae5e030 | 2014-11-28 19:40:50 -0500 | [diff] [blame] | 1125 | ssize_t res; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 1126 | |
Jens Axboe | ebfcd89 | 2019-12-09 20:58:56 -0700 | [diff] [blame] | 1127 | if (file->f_flags & O_NONBLOCK || (iocb->ki_flags & IOCB_NOWAIT)) |
Al Viro | 8ae5e030 | 2014-11-28 19:40:50 -0500 | [diff] [blame] | 1128 | msg.msg_flags = MSG_DONTWAIT; |
| 1129 | |
| 1130 | if (iocb->ki_pos != 0) |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 1131 | return -ESPIPE; |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 1132 | |
Christoph Hellwig | 66ee59a | 2015-02-11 19:56:46 +0100 | [diff] [blame] | 1133 | if (!iov_iter_count(to)) /* Match SYS5 behaviour */ |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 1134 | return 0; |
| 1135 | |
Al Viro | 2da6290 | 2015-03-14 21:13:46 -0400 | [diff] [blame] | 1136 | res = sock_recvmsg(sock, &msg, msg.msg_flags); |
Al Viro | 8ae5e030 | 2014-11-28 19:40:50 -0500 | [diff] [blame] | 1137 | *to = msg.msg_iter; |
| 1138 | return res; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 1139 | } |
| 1140 | |
Al Viro | 8ae5e030 | 2014-11-28 19:40:50 -0500 | [diff] [blame] | 1141 | 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] | 1142 | { |
Al Viro | 6d65233 | 2015-01-30 16:12:56 -0500 | [diff] [blame] | 1143 | struct file *file = iocb->ki_filp; |
| 1144 | struct socket *sock = file->private_data; |
tadeusz.struk@intel.com | 0345f93 | 2015-03-19 12:31:25 -0700 | [diff] [blame] | 1145 | struct msghdr msg = {.msg_iter = *from, |
| 1146 | .msg_iocb = iocb}; |
Al Viro | 8ae5e030 | 2014-11-28 19:40:50 -0500 | [diff] [blame] | 1147 | ssize_t res; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 1148 | |
Al Viro | 8ae5e030 | 2014-11-28 19:40:50 -0500 | [diff] [blame] | 1149 | if (iocb->ki_pos != 0) |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 1150 | return -ESPIPE; |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 1151 | |
Jens Axboe | ebfcd89 | 2019-12-09 20:58:56 -0700 | [diff] [blame] | 1152 | if (file->f_flags & O_NONBLOCK || (iocb->ki_flags & IOCB_NOWAIT)) |
Al Viro | 8ae5e030 | 2014-11-28 19:40:50 -0500 | [diff] [blame] | 1153 | msg.msg_flags = MSG_DONTWAIT; |
| 1154 | |
Al Viro | 6d65233 | 2015-01-30 16:12:56 -0500 | [diff] [blame] | 1155 | if (sock->type == SOCK_SEQPACKET) |
| 1156 | msg.msg_flags |= MSG_EOR; |
| 1157 | |
Jordan Rife | 86a7e0b | 2023-09-21 18:46:41 -0500 | [diff] [blame] | 1158 | res = __sock_sendmsg(sock, &msg); |
Al Viro | 8ae5e030 | 2014-11-28 19:40:50 -0500 | [diff] [blame] | 1159 | *from = msg.msg_iter; |
| 1160 | return res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1161 | } |
| 1162 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1163 | /* |
| 1164 | * Atomic setting of ioctl hooks to avoid race |
| 1165 | * with module unload. |
| 1166 | */ |
| 1167 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1168 | static DEFINE_MUTEX(br_ioctl_mutex); |
Arnd Bergmann | ad2f99a | 2021-07-27 15:45:16 +0200 | [diff] [blame] | 1169 | static int (*br_ioctl_hook)(struct net *net, struct net_bridge *br, |
| 1170 | unsigned int cmd, struct ifreq *ifr, |
| 1171 | void __user *uarg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1172 | |
Arnd Bergmann | ad2f99a | 2021-07-27 15:45:16 +0200 | [diff] [blame] | 1173 | void brioctl_set(int (*hook)(struct net *net, struct net_bridge *br, |
| 1174 | unsigned int cmd, struct ifreq *ifr, |
| 1175 | void __user *uarg)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1176 | { |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1177 | mutex_lock(&br_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1178 | br_ioctl_hook = hook; |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1179 | mutex_unlock(&br_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1180 | } |
| 1181 | EXPORT_SYMBOL(brioctl_set); |
| 1182 | |
Arnd Bergmann | ad2f99a | 2021-07-27 15:45:16 +0200 | [diff] [blame] | 1183 | int br_ioctl_call(struct net *net, struct net_bridge *br, unsigned int cmd, |
| 1184 | struct ifreq *ifr, void __user *uarg) |
| 1185 | { |
| 1186 | int err = -ENOPKG; |
| 1187 | |
| 1188 | if (!br_ioctl_hook) |
| 1189 | request_module("bridge"); |
| 1190 | |
| 1191 | mutex_lock(&br_ioctl_mutex); |
| 1192 | if (br_ioctl_hook) |
| 1193 | err = br_ioctl_hook(net, br, cmd, ifr, uarg); |
| 1194 | mutex_unlock(&br_ioctl_mutex); |
| 1195 | |
| 1196 | return err; |
| 1197 | } |
| 1198 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1199 | static DEFINE_MUTEX(vlan_ioctl_mutex); |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1200 | static int (*vlan_ioctl_hook) (struct net *, void __user *arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1202 | void vlan_ioctl_set(int (*hook) (struct net *, void __user *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1203 | { |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1204 | mutex_lock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1205 | vlan_ioctl_hook = hook; |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1206 | mutex_unlock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1207 | } |
| 1208 | EXPORT_SYMBOL(vlan_ioctl_set); |
| 1209 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 1210 | static long sock_do_ioctl(struct net *net, struct socket *sock, |
Johannes Berg | 63ff03a | 2019-01-25 22:43:17 +0100 | [diff] [blame] | 1211 | unsigned int cmd, unsigned long arg) |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 1212 | { |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1213 | const struct proto_ops *ops = READ_ONCE(sock->ops); |
Arnd Bergmann | 876f0bf | 2021-07-22 16:29:02 +0200 | [diff] [blame] | 1214 | struct ifreq ifr; |
| 1215 | bool need_copyout; |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 1216 | int err; |
| 1217 | void __user *argp = (void __user *)arg; |
Arnd Bergmann | a554bf9 | 2021-07-27 15:45:12 +0200 | [diff] [blame] | 1218 | void __user *data; |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 1219 | |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1220 | err = ops->ioctl(sock, cmd, arg); |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 1221 | |
| 1222 | /* |
| 1223 | * If this ioctl is unknown try to hand it down |
| 1224 | * to the NIC driver. |
| 1225 | */ |
Al Viro | 36fd633 | 2017-06-26 13:19:16 -0400 | [diff] [blame] | 1226 | if (err != -ENOIOCTLCMD) |
| 1227 | return err; |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 1228 | |
Jakub Kicinski | 29ce8f9 | 2021-08-31 09:06:04 -0700 | [diff] [blame] | 1229 | if (!is_socket_ioctl_cmd(cmd)) |
| 1230 | return -ENOTTY; |
| 1231 | |
Arnd Bergmann | a554bf9 | 2021-07-27 15:45:12 +0200 | [diff] [blame] | 1232 | if (get_user_ifreq(&ifr, &data, argp)) |
Arnd Bergmann | 876f0bf | 2021-07-22 16:29:02 +0200 | [diff] [blame] | 1233 | return -EFAULT; |
Arnd Bergmann | a554bf9 | 2021-07-27 15:45:12 +0200 | [diff] [blame] | 1234 | err = dev_ioctl(net, cmd, &ifr, data, &need_copyout); |
Arnd Bergmann | 876f0bf | 2021-07-22 16:29:02 +0200 | [diff] [blame] | 1235 | if (!err && need_copyout) |
Arnd Bergmann | a554bf9 | 2021-07-27 15:45:12 +0200 | [diff] [blame] | 1236 | if (put_user_ifreq(&ifr, argp)) |
Al Viro | 36fd633 | 2017-06-26 13:19:16 -0400 | [diff] [blame] | 1237 | return -EFAULT; |
Arnd Bergmann | 876f0bf | 2021-07-22 16:29:02 +0200 | [diff] [blame] | 1238 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 1239 | return err; |
| 1240 | } |
| 1241 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1242 | /* |
| 1243 | * With an ioctl, arg may well be a user mode pointer, but we don't know |
| 1244 | * what to do with it - that's up to the protocol still. |
| 1245 | */ |
| 1246 | |
| 1247 | static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) |
| 1248 | { |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1249 | const struct proto_ops *ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1250 | struct socket *sock; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1251 | struct sock *sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1252 | void __user *argp = (void __user *)arg; |
| 1253 | int pid, err; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1254 | struct net *net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1255 | |
Eric Dumazet | b69aee0 | 2005-09-06 14:42:45 -0700 | [diff] [blame] | 1256 | sock = file->private_data; |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1257 | ops = READ_ONCE(sock->ops); |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1258 | sk = sock->sk; |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 1259 | net = sock_net(sk); |
Al Viro | 44c02a2 | 2017-10-05 12:59:44 -0400 | [diff] [blame] | 1260 | if (unlikely(cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15))) { |
| 1261 | struct ifreq ifr; |
Arnd Bergmann | a554bf9 | 2021-07-27 15:45:12 +0200 | [diff] [blame] | 1262 | void __user *data; |
Al Viro | 44c02a2 | 2017-10-05 12:59:44 -0400 | [diff] [blame] | 1263 | bool need_copyout; |
Arnd Bergmann | a554bf9 | 2021-07-27 15:45:12 +0200 | [diff] [blame] | 1264 | if (get_user_ifreq(&ifr, &data, argp)) |
Al Viro | 44c02a2 | 2017-10-05 12:59:44 -0400 | [diff] [blame] | 1265 | return -EFAULT; |
Arnd Bergmann | a554bf9 | 2021-07-27 15:45:12 +0200 | [diff] [blame] | 1266 | err = dev_ioctl(net, cmd, &ifr, data, &need_copyout); |
Al Viro | 44c02a2 | 2017-10-05 12:59:44 -0400 | [diff] [blame] | 1267 | if (!err && need_copyout) |
Arnd Bergmann | a554bf9 | 2021-07-27 15:45:12 +0200 | [diff] [blame] | 1268 | if (put_user_ifreq(&ifr, argp)) |
Al Viro | 44c02a2 | 2017-10-05 12:59:44 -0400 | [diff] [blame] | 1269 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1270 | } else |
Johannes Berg | 3d23e34 | 2009-09-29 23:27:28 +0200 | [diff] [blame] | 1271 | #ifdef CONFIG_WEXT_CORE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1272 | if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { |
Al Viro | b1b0c24 | 2017-10-01 20:13:08 -0400 | [diff] [blame] | 1273 | err = wext_handle_ioctl(net, cmd, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1274 | } else |
Johannes Berg | 3d23e34 | 2009-09-29 23:27:28 +0200 | [diff] [blame] | 1275 | #endif |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1276 | switch (cmd) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1277 | case FIOSETOWN: |
| 1278 | case SIOCSPGRP: |
| 1279 | err = -EFAULT; |
| 1280 | if (get_user(pid, (int __user *)argp)) |
| 1281 | break; |
Jiri Slaby | 393cc3f | 2017-06-13 13:35:50 +0200 | [diff] [blame] | 1282 | err = f_setown(sock->file, pid, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1283 | break; |
| 1284 | case FIOGETOWN: |
| 1285 | case SIOCGPGRP: |
Eric W. Biederman | 609d7fa | 2006-10-02 02:17:15 -0700 | [diff] [blame] | 1286 | err = put_user(f_getown(sock->file), |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1287 | (int __user *)argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1288 | break; |
| 1289 | case SIOCGIFBR: |
| 1290 | case SIOCSIFBR: |
| 1291 | case SIOCBRADDBR: |
| 1292 | case SIOCBRDELBR: |
Arnd Bergmann | ad2f99a | 2021-07-27 15:45:16 +0200 | [diff] [blame] | 1293 | err = br_ioctl_call(net, NULL, cmd, NULL, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1294 | break; |
| 1295 | case SIOCGIFVLAN: |
| 1296 | case SIOCSIFVLAN: |
| 1297 | err = -ENOPKG; |
| 1298 | if (!vlan_ioctl_hook) |
| 1299 | request_module("8021q"); |
| 1300 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1301 | mutex_lock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1302 | if (vlan_ioctl_hook) |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1303 | err = vlan_ioctl_hook(net, argp); |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1304 | mutex_unlock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1305 | break; |
Andrey Vagin | c62cce2 | 2016-10-24 18:29:13 -0700 | [diff] [blame] | 1306 | case SIOCGSKNS: |
| 1307 | err = -EPERM; |
| 1308 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
| 1309 | break; |
| 1310 | |
| 1311 | err = open_related_ns(&net->ns, get_net_ns); |
| 1312 | break; |
Arnd Bergmann | 0768e17 | 2019-04-17 22:56:11 +0200 | [diff] [blame] | 1313 | case SIOCGSTAMP_OLD: |
| 1314 | case SIOCGSTAMPNS_OLD: |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1315 | if (!ops->gettstamp) { |
Arnd Bergmann | c7cbdbf | 2019-04-17 22:51:48 +0200 | [diff] [blame] | 1316 | err = -ENOIOCTLCMD; |
| 1317 | break; |
| 1318 | } |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1319 | err = ops->gettstamp(sock, argp, |
| 1320 | cmd == SIOCGSTAMP_OLD, |
| 1321 | !IS_ENABLED(CONFIG_64BIT)); |
Gustavo A. R. Silva | 6074782 | 2019-04-24 10:31:24 -0500 | [diff] [blame] | 1322 | break; |
Arnd Bergmann | 0768e17 | 2019-04-17 22:56:11 +0200 | [diff] [blame] | 1323 | case SIOCGSTAMP_NEW: |
| 1324 | case SIOCGSTAMPNS_NEW: |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1325 | if (!ops->gettstamp) { |
Arnd Bergmann | 0768e17 | 2019-04-17 22:56:11 +0200 | [diff] [blame] | 1326 | err = -ENOIOCTLCMD; |
| 1327 | break; |
| 1328 | } |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1329 | err = ops->gettstamp(sock, argp, |
| 1330 | cmd == SIOCGSTAMP_NEW, |
| 1331 | false); |
Arnd Bergmann | c7cbdbf | 2019-04-17 22:51:48 +0200 | [diff] [blame] | 1332 | break; |
Arnd Bergmann | 876f0bf | 2021-07-22 16:29:02 +0200 | [diff] [blame] | 1333 | |
| 1334 | case SIOCGIFCONF: |
| 1335 | err = dev_ifconf(net, argp); |
| 1336 | break; |
| 1337 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1338 | default: |
Johannes Berg | 63ff03a | 2019-01-25 22:43:17 +0100 | [diff] [blame] | 1339 | err = sock_do_ioctl(net, sock, cmd, arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1340 | break; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1341 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1342 | return err; |
| 1343 | } |
| 1344 | |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 1345 | /** |
| 1346 | * sock_create_lite - creates a socket |
| 1347 | * @family: protocol family (AF_INET, ...) |
| 1348 | * @type: communication type (SOCK_STREAM, ...) |
| 1349 | * @protocol: protocol (0, ...) |
| 1350 | * @res: new socket |
| 1351 | * |
| 1352 | * Creates a new socket and assigns it to @res, passing through LSM. |
| 1353 | * The new socket initialization is not complete, see kernel_accept(). |
| 1354 | * Returns 0 or an error. On failure @res is set to %NULL. |
| 1355 | * This function internally uses GFP_KERNEL. |
| 1356 | */ |
| 1357 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1358 | int sock_create_lite(int family, int type, int protocol, struct socket **res) |
| 1359 | { |
| 1360 | int err; |
| 1361 | struct socket *sock = NULL; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1362 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1363 | err = security_socket_create(family, type, protocol, 1); |
| 1364 | if (err) |
| 1365 | goto out; |
| 1366 | |
| 1367 | sock = sock_alloc(); |
| 1368 | if (!sock) { |
| 1369 | err = -ENOMEM; |
| 1370 | goto out; |
| 1371 | } |
| 1372 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1373 | sock->type = type; |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 1374 | err = security_socket_post_create(sock, family, type, protocol, 1); |
| 1375 | if (err) |
| 1376 | goto out_release; |
| 1377 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1378 | out: |
| 1379 | *res = sock; |
| 1380 | return err; |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 1381 | out_release: |
| 1382 | sock_release(sock); |
| 1383 | sock = NULL; |
| 1384 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1385 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1386 | EXPORT_SYMBOL(sock_create_lite); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1387 | |
| 1388 | /* No kernel lock held - perfect */ |
Al Viro | ade994f | 2017-07-03 00:01:49 -0400 | [diff] [blame] | 1389 | static __poll_t sock_poll(struct file *file, poll_table *wait) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1390 | { |
Christoph Hellwig | 3cafb37 | 2018-01-09 16:07:34 +0100 | [diff] [blame] | 1391 | struct socket *sock = file->private_data; |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1392 | const struct proto_ops *ops = READ_ONCE(sock->ops); |
Christoph Hellwig | a331de3 | 2018-07-30 09:42:13 +0200 | [diff] [blame] | 1393 | __poll_t events = poll_requested_events(wait), flag = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1394 | |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1395 | if (!ops->poll) |
Christoph Hellwig | e88958e | 2018-06-29 15:37:24 +0200 | [diff] [blame] | 1396 | return 0; |
Christoph Hellwig | f641f13b | 2018-07-30 09:42:12 +0200 | [diff] [blame] | 1397 | |
Christoph Hellwig | a331de3 | 2018-07-30 09:42:13 +0200 | [diff] [blame] | 1398 | if (sk_can_busy_loop(sock->sk)) { |
| 1399 | /* poll once if requested by the syscall */ |
| 1400 | if (events & POLL_BUSY_LOOP) |
| 1401 | sk_busy_loop(sock->sk, 1); |
| 1402 | |
| 1403 | /* if this socket can poll_ll, tell the system call */ |
| 1404 | flag = POLL_BUSY_LOOP; |
| 1405 | } |
| 1406 | |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1407 | return ops->poll(file, sock, wait) | flag; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1408 | } |
| 1409 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1410 | static int sock_mmap(struct file *file, struct vm_area_struct *vma) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1411 | { |
Eric Dumazet | b69aee0 | 2005-09-06 14:42:45 -0700 | [diff] [blame] | 1412 | struct socket *sock = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1413 | |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1414 | return READ_ONCE(sock->ops)->mmap(file, sock, vma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1415 | } |
| 1416 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 1417 | static int sock_close(struct inode *inode, struct file *filp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1418 | { |
Cong Wang | 6d8c50d | 2018-06-07 13:39:49 -0700 | [diff] [blame] | 1419 | __sock_release(SOCKET_I(inode), inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1420 | return 0; |
| 1421 | } |
| 1422 | |
| 1423 | /* |
| 1424 | * Update the socket async list |
| 1425 | * |
| 1426 | * Fasync_list locking strategy. |
| 1427 | * |
| 1428 | * 1. fasync_list is modified only under process context socket lock |
| 1429 | * i.e. under semaphore. |
| 1430 | * 2. fasync_list is used under read_lock(&sk->sk_callback_lock) |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1431 | * or under socket lock |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1432 | */ |
| 1433 | |
| 1434 | static int sock_fasync(int fd, struct file *filp, int on) |
| 1435 | { |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1436 | struct socket *sock = filp->private_data; |
| 1437 | struct sock *sk = sock->sk; |
Al Viro | 333f790 | 2019-07-05 20:14:16 +0100 | [diff] [blame] | 1438 | struct socket_wq *wq = &sock->wq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1439 | |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1440 | if (sk == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1441 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1442 | |
| 1443 | lock_sock(sk); |
Eric Dumazet | eaefd110 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 1444 | fasync_helper(fd, filp, on, &wq->fasync_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1445 | |
Eric Dumazet | eaefd110 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 1446 | if (!wq->fasync_list) |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1447 | sock_reset_flag(sk, SOCK_FASYNC); |
Jonathan Corbet | 7639842 | 2009-02-01 14:26:59 -0700 | [diff] [blame] | 1448 | else |
Eric Dumazet | bcdce71 | 2009-10-06 17:28:29 -0700 | [diff] [blame] | 1449 | sock_set_flag(sk, SOCK_FASYNC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1450 | |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1451 | release_sock(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1452 | return 0; |
| 1453 | } |
| 1454 | |
Eric Dumazet | ceb5d58 | 2015-11-29 20:03:11 -0800 | [diff] [blame] | 1455 | /* This function may be called only under rcu_lock */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1456 | |
Eric Dumazet | ceb5d58 | 2015-11-29 20:03:11 -0800 | [diff] [blame] | 1457 | int sock_wake_async(struct socket_wq *wq, int how, int band) |
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 | if (!wq || !wq->fasync_list) |
| 1460 | return -1; |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1461 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1462 | switch (how) { |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1463 | case SOCK_WAKE_WAITD: |
Eric Dumazet | ceb5d58 | 2015-11-29 20:03:11 -0800 | [diff] [blame] | 1464 | if (test_bit(SOCKWQ_ASYNC_WAITDATA, &wq->flags)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1465 | break; |
| 1466 | goto call_kill; |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1467 | case SOCK_WAKE_SPACE: |
Eric Dumazet | ceb5d58 | 2015-11-29 20:03:11 -0800 | [diff] [blame] | 1468 | if (!test_and_clear_bit(SOCKWQ_ASYNC_NOSPACE, &wq->flags)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1469 | break; |
Miaohe Lin | 7c7ab58 | 2020-08-08 16:23:10 +0800 | [diff] [blame] | 1470 | fallthrough; |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1471 | case SOCK_WAKE_IO: |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1472 | call_kill: |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1473 | kill_fasync(&wq->fasync_list, SIGIO, band); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1474 | break; |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1475 | case SOCK_WAKE_URG: |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1476 | kill_fasync(&wq->fasync_list, SIGURG, band); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1477 | } |
Eric Dumazet | ceb5d58 | 2015-11-29 20:03:11 -0800 | [diff] [blame] | 1478 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1479 | return 0; |
| 1480 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1481 | EXPORT_SYMBOL(sock_wake_async); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1482 | |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 1483 | /** |
| 1484 | * __sock_create - creates a socket |
| 1485 | * @net: net namespace |
| 1486 | * @family: protocol family (AF_INET, ...) |
| 1487 | * @type: communication type (SOCK_STREAM, ...) |
| 1488 | * @protocol: protocol (0, ...) |
| 1489 | * @res: new socket |
| 1490 | * @kern: boolean for kernel space sockets |
| 1491 | * |
| 1492 | * Creates a new socket and assigns it to @res, passing through LSM. |
| 1493 | * Returns 0 or an error. On failure @res is set to %NULL. @kern must |
| 1494 | * be set to true if the socket resides in kernel space. |
| 1495 | * This function internally uses GFP_KERNEL. |
| 1496 | */ |
| 1497 | |
Pavel Emelyanov | 721db93 | 2010-09-29 16:06:32 +0400 | [diff] [blame] | 1498 | int __sock_create(struct net *net, int family, int type, int protocol, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1499 | struct socket **res, int kern) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1500 | { |
| 1501 | int err; |
| 1502 | struct socket *sock; |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1503 | const struct net_proto_family *pf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1504 | |
| 1505 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1506 | * Check protocol is in range |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1507 | */ |
| 1508 | if (family < 0 || family >= NPROTO) |
| 1509 | return -EAFNOSUPPORT; |
| 1510 | if (type < 0 || type >= SOCK_MAX) |
| 1511 | return -EINVAL; |
| 1512 | |
| 1513 | /* Compatibility. |
| 1514 | |
| 1515 | This uglymoron is moved from INET layer to here to avoid |
| 1516 | deadlock in module load. |
| 1517 | */ |
| 1518 | if (family == PF_INET && type == SOCK_PACKET) { |
liping.zhang | f3c9869 | 2016-03-11 23:08:36 +0800 | [diff] [blame] | 1519 | pr_info_once("%s uses obsolete (PF_INET,SOCK_PACKET)\n", |
| 1520 | current->comm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1521 | family = PF_PACKET; |
| 1522 | } |
| 1523 | |
| 1524 | err = security_socket_create(family, type, protocol, kern); |
| 1525 | if (err) |
| 1526 | return err; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1527 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1528 | /* |
| 1529 | * Allocate the socket and allow the family to set things up. if |
| 1530 | * the protocol is 0, the family is instructed to select an appropriate |
| 1531 | * default. |
| 1532 | */ |
| 1533 | sock = sock_alloc(); |
| 1534 | if (!sock) { |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 1535 | net_warn_ratelimited("socket: no more sockets\n"); |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1536 | return -ENFILE; /* Not exactly a match, but its the |
| 1537 | closest posix thing */ |
| 1538 | } |
| 1539 | |
| 1540 | sock->type = type; |
| 1541 | |
Johannes Berg | 95a5afc | 2008-10-16 15:24:51 -0700 | [diff] [blame] | 1542 | #ifdef CONFIG_MODULES |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1543 | /* Attempt to load a protocol module if the find failed. |
| 1544 | * |
| 1545 | * 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] | 1546 | * requested real, full-featured networking support upon configuration. |
| 1547 | * Otherwise module support will break! |
| 1548 | */ |
Eric Dumazet | 190683a | 2010-11-10 10:50:44 +0000 | [diff] [blame] | 1549 | if (rcu_access_pointer(net_families[family]) == NULL) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1550 | request_module("net-pf-%d", family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1551 | #endif |
| 1552 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1553 | rcu_read_lock(); |
| 1554 | pf = rcu_dereference(net_families[family]); |
| 1555 | err = -EAFNOSUPPORT; |
| 1556 | if (!pf) |
| 1557 | goto out_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1558 | |
| 1559 | /* |
| 1560 | * We will call the ->create function, that possibly is in a loadable |
| 1561 | * module, so we have to bump that loadable module refcnt first. |
| 1562 | */ |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1563 | if (!try_module_get(pf->owner)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1564 | goto out_release; |
| 1565 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1566 | /* Now protected by module ref count */ |
| 1567 | rcu_read_unlock(); |
| 1568 | |
Eric Paris | 3f378b68 | 2009-11-05 22:18:14 -0800 | [diff] [blame] | 1569 | err = pf->create(net, sock, protocol, kern); |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1570 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1571 | goto out_module_put; |
Frank Filz | a79af59 | 2005-09-27 15:23:38 -0700 | [diff] [blame] | 1572 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1573 | /* |
| 1574 | * Now to bump the refcnt of the [loadable] module that owns this |
| 1575 | * socket at sock_release time we decrement its refcnt. |
| 1576 | */ |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1577 | if (!try_module_get(sock->ops->owner)) |
| 1578 | goto out_module_busy; |
| 1579 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1580 | /* |
| 1581 | * Now that we're done with the ->create function, the [loadable] |
| 1582 | * module can have its refcnt decremented |
| 1583 | */ |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1584 | module_put(pf->owner); |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 1585 | err = security_socket_post_create(sock, family, type, protocol, kern); |
| 1586 | if (err) |
Herbert Xu | 3b18552 | 2007-08-15 14:46:02 -0700 | [diff] [blame] | 1587 | goto out_sock_release; |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1588 | *res = sock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1589 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1590 | return 0; |
| 1591 | |
| 1592 | out_module_busy: |
| 1593 | err = -EAFNOSUPPORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1594 | out_module_put: |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1595 | sock->ops = NULL; |
| 1596 | module_put(pf->owner); |
| 1597 | out_sock_release: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1598 | sock_release(sock); |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1599 | return err; |
| 1600 | |
| 1601 | out_release: |
| 1602 | rcu_read_unlock(); |
| 1603 | goto out_sock_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1604 | } |
Pavel Emelyanov | 721db93 | 2010-09-29 16:06:32 +0400 | [diff] [blame] | 1605 | EXPORT_SYMBOL(__sock_create); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1606 | |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 1607 | /** |
| 1608 | * sock_create - creates a socket |
| 1609 | * @family: protocol family (AF_INET, ...) |
| 1610 | * @type: communication type (SOCK_STREAM, ...) |
| 1611 | * @protocol: protocol (0, ...) |
| 1612 | * @res: new socket |
| 1613 | * |
| 1614 | * A wrapper around __sock_create(). |
| 1615 | * Returns 0 or an error. This function internally uses GFP_KERNEL. |
| 1616 | */ |
| 1617 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1618 | int sock_create(int family, int type, int protocol, struct socket **res) |
| 1619 | { |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 1620 | return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1621 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1622 | EXPORT_SYMBOL(sock_create); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1623 | |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 1624 | /** |
| 1625 | * sock_create_kern - creates a socket (kernel space) |
| 1626 | * @net: net namespace |
| 1627 | * @family: protocol family (AF_INET, ...) |
| 1628 | * @type: communication type (SOCK_STREAM, ...) |
| 1629 | * @protocol: protocol (0, ...) |
| 1630 | * @res: new socket |
| 1631 | * |
| 1632 | * A wrapper around __sock_create(). |
| 1633 | * Returns 0 or an error. This function internally uses GFP_KERNEL. |
| 1634 | */ |
| 1635 | |
Eric W. Biederman | eeb1bd5 | 2015-05-08 21:08:05 -0500 | [diff] [blame] | 1636 | 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] | 1637 | { |
Eric W. Biederman | eeb1bd5 | 2015-05-08 21:08:05 -0500 | [diff] [blame] | 1638 | return __sock_create(net, family, type, protocol, res, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1639 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1640 | EXPORT_SYMBOL(sock_create_kern); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1641 | |
Jens Axboe | da214a4 | 2022-04-12 14:22:39 -0600 | [diff] [blame] | 1642 | static struct socket *__sys_socket_create(int family, int type, int protocol) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1643 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1644 | struct socket *sock; |
Jens Axboe | da214a4 | 2022-04-12 14:22:39 -0600 | [diff] [blame] | 1645 | int retval; |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1646 | |
Ulrich Drepper | e38b36f | 2008-07-23 21:29:42 -0700 | [diff] [blame] | 1647 | /* Check the SOCK_* constants for consistency. */ |
| 1648 | BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC); |
| 1649 | BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK); |
| 1650 | BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK); |
| 1651 | BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK); |
| 1652 | |
Jens Axboe | da214a4 | 2022-04-12 14:22:39 -0600 | [diff] [blame] | 1653 | if ((type & ~SOCK_TYPE_MASK) & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
| 1654 | return ERR_PTR(-EINVAL); |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1655 | type &= SOCK_TYPE_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1656 | |
| 1657 | retval = sock_create(family, type, protocol, &sock); |
| 1658 | if (retval < 0) |
Jens Axboe | da214a4 | 2022-04-12 14:22:39 -0600 | [diff] [blame] | 1659 | return ERR_PTR(retval); |
| 1660 | |
| 1661 | return sock; |
| 1662 | } |
| 1663 | |
| 1664 | struct file *__sys_socket_file(int family, int type, int protocol) |
| 1665 | { |
| 1666 | struct socket *sock; |
Jens Axboe | da214a4 | 2022-04-12 14:22:39 -0600 | [diff] [blame] | 1667 | int flags; |
| 1668 | |
| 1669 | sock = __sys_socket_create(family, type, protocol); |
| 1670 | if (IS_ERR(sock)) |
| 1671 | return ERR_CAST(sock); |
| 1672 | |
| 1673 | flags = type & ~SOCK_TYPE_MASK; |
| 1674 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
| 1675 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
| 1676 | |
Thadeu Lima de Souza Cascardo | 649c15c | 2023-03-07 14:37:07 -0300 | [diff] [blame] | 1677 | return sock_alloc_file(sock, flags, NULL); |
Jens Axboe | da214a4 | 2022-04-12 14:22:39 -0600 | [diff] [blame] | 1678 | } |
| 1679 | |
Geliang Tang | 0dd061a | 2023-08-16 09:11:56 +0800 | [diff] [blame] | 1680 | /* A hook for bpf progs to attach to and update socket protocol. |
| 1681 | * |
| 1682 | * A static noinline declaration here could cause the compiler to |
| 1683 | * optimize away the function. A global noinline declaration will |
| 1684 | * keep the definition, but may optimize away the callsite. |
| 1685 | * Therefore, __weak is needed to ensure that the call is still |
| 1686 | * emitted, by telling the compiler that we don't know what the |
| 1687 | * function might eventually be. |
Geliang Tang | 0dd061a | 2023-08-16 09:11:56 +0800 | [diff] [blame] | 1688 | */ |
| 1689 | |
Dave Marchevsky | 15fb6f2b | 2023-10-31 14:56:25 -0700 | [diff] [blame] | 1690 | __bpf_hook_start(); |
Geliang Tang | 0dd061a | 2023-08-16 09:11:56 +0800 | [diff] [blame] | 1691 | |
| 1692 | __weak noinline int update_socket_protocol(int family, int type, int protocol) |
| 1693 | { |
| 1694 | return protocol; |
| 1695 | } |
| 1696 | |
Dave Marchevsky | 15fb6f2b | 2023-10-31 14:56:25 -0700 | [diff] [blame] | 1697 | __bpf_hook_end(); |
Geliang Tang | 0dd061a | 2023-08-16 09:11:56 +0800 | [diff] [blame] | 1698 | |
Jens Axboe | da214a4 | 2022-04-12 14:22:39 -0600 | [diff] [blame] | 1699 | int __sys_socket(int family, int type, int protocol) |
| 1700 | { |
| 1701 | struct socket *sock; |
| 1702 | int flags; |
| 1703 | |
Geliang Tang | 0dd061a | 2023-08-16 09:11:56 +0800 | [diff] [blame] | 1704 | sock = __sys_socket_create(family, type, |
| 1705 | update_socket_protocol(family, type, protocol)); |
Jens Axboe | da214a4 | 2022-04-12 14:22:39 -0600 | [diff] [blame] | 1706 | if (IS_ERR(sock)) |
| 1707 | return PTR_ERR(sock); |
| 1708 | |
| 1709 | flags = type & ~SOCK_TYPE_MASK; |
| 1710 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
| 1711 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1712 | |
Al Viro | 8e1611e | 2017-12-05 23:29:09 +0000 | [diff] [blame] | 1713 | return sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1714 | } |
| 1715 | |
Dominik Brodowski | 9d6a15c | 2018-03-13 19:29:43 +0100 | [diff] [blame] | 1716 | SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol) |
| 1717 | { |
| 1718 | return __sys_socket(family, type, protocol); |
| 1719 | } |
| 1720 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1721 | /* |
| 1722 | * Create a pair of connected sockets. |
| 1723 | */ |
| 1724 | |
Dominik Brodowski | 6debc8d | 2018-03-13 19:49:23 +0100 | [diff] [blame] | 1725 | int __sys_socketpair(int family, int type, int protocol, int __user *usockvec) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1726 | { |
| 1727 | struct socket *sock1, *sock2; |
| 1728 | int fd1, fd2, err; |
Al Viro | db34950 | 2007-02-07 01:48:00 -0500 | [diff] [blame] | 1729 | struct file *newfile1, *newfile2; |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1730 | int flags; |
| 1731 | |
| 1732 | flags = type & ~SOCK_TYPE_MASK; |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 1733 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1734 | return -EINVAL; |
| 1735 | type &= SOCK_TYPE_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1736 | |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1737 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
| 1738 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
| 1739 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1740 | /* |
Al Viro | 016a266 | 2017-12-05 23:28:38 +0000 | [diff] [blame] | 1741 | * reserve descriptors and make sure we won't fail |
| 1742 | * to return them to userland. |
| 1743 | */ |
| 1744 | fd1 = get_unused_fd_flags(flags); |
| 1745 | if (unlikely(fd1 < 0)) |
| 1746 | return fd1; |
| 1747 | |
| 1748 | fd2 = get_unused_fd_flags(flags); |
| 1749 | if (unlikely(fd2 < 0)) { |
| 1750 | put_unused_fd(fd1); |
| 1751 | return fd2; |
| 1752 | } |
| 1753 | |
| 1754 | err = put_user(fd1, &usockvec[0]); |
| 1755 | if (err) |
| 1756 | goto out; |
| 1757 | |
| 1758 | err = put_user(fd2, &usockvec[1]); |
| 1759 | if (err) |
| 1760 | goto out; |
| 1761 | |
| 1762 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1763 | * Obtain the first socket and check if the underlying protocol |
| 1764 | * supports the socketpair call. |
| 1765 | */ |
| 1766 | |
| 1767 | err = sock_create(family, type, protocol, &sock1); |
Al Viro | 016a266 | 2017-12-05 23:28:38 +0000 | [diff] [blame] | 1768 | if (unlikely(err < 0)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1769 | goto out; |
| 1770 | |
| 1771 | err = sock_create(family, type, protocol, &sock2); |
Al Viro | 016a266 | 2017-12-05 23:28:38 +0000 | [diff] [blame] | 1772 | if (unlikely(err < 0)) { |
| 1773 | sock_release(sock1); |
| 1774 | goto out; |
David S. Miller | bf3c23d | 2007-10-29 21:54:02 -0700 | [diff] [blame] | 1775 | } |
Yann Droneaud | d73aa28 | 2013-12-09 22:42:20 +0100 | [diff] [blame] | 1776 | |
David Herrmann | d47cd94 | 2018-05-04 16:28:20 +0200 | [diff] [blame] | 1777 | err = security_socket_socketpair(sock1, sock2); |
| 1778 | if (unlikely(err)) { |
| 1779 | sock_release(sock2); |
| 1780 | sock_release(sock1); |
| 1781 | goto out; |
| 1782 | } |
| 1783 | |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1784 | err = READ_ONCE(sock1->ops)->socketpair(sock1, sock2); |
Al Viro | 016a266 | 2017-12-05 23:28:38 +0000 | [diff] [blame] | 1785 | if (unlikely(err < 0)) { |
| 1786 | sock_release(sock2); |
| 1787 | sock_release(sock1); |
| 1788 | goto out; |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1789 | } |
| 1790 | |
Linus Torvalds | aab174f | 2012-10-02 20:25:04 -0700 | [diff] [blame] | 1791 | newfile1 = sock_alloc_file(sock1, flags, NULL); |
Viresh Kumar | b5ffe63 | 2015-08-12 15:59:47 +0530 | [diff] [blame] | 1792 | if (IS_ERR(newfile1)) { |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1793 | err = PTR_ERR(newfile1); |
Al Viro | 016a266 | 2017-12-05 23:28:38 +0000 | [diff] [blame] | 1794 | sock_release(sock2); |
| 1795 | goto out; |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1796 | } |
| 1797 | |
Linus Torvalds | aab174f | 2012-10-02 20:25:04 -0700 | [diff] [blame] | 1798 | newfile2 = sock_alloc_file(sock2, flags, NULL); |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1799 | if (IS_ERR(newfile2)) { |
| 1800 | err = PTR_ERR(newfile2); |
Al Viro | 016a266 | 2017-12-05 23:28:38 +0000 | [diff] [blame] | 1801 | fput(newfile1); |
| 1802 | goto out; |
Al Viro | db34950 | 2007-02-07 01:48:00 -0500 | [diff] [blame] | 1803 | } |
| 1804 | |
Al Viro | 157cf64 | 2008-12-14 04:57:47 -0500 | [diff] [blame] | 1805 | audit_fd_pair(fd1, fd2); |
Yann Droneaud | d73aa28 | 2013-12-09 22:42:20 +0100 | [diff] [blame] | 1806 | |
Al Viro | db34950 | 2007-02-07 01:48:00 -0500 | [diff] [blame] | 1807 | fd_install(fd1, newfile1); |
| 1808 | fd_install(fd2, newfile2); |
Yann Droneaud | d73aa28 | 2013-12-09 22:42:20 +0100 | [diff] [blame] | 1809 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1810 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1811 | out: |
Al Viro | 016a266 | 2017-12-05 23:28:38 +0000 | [diff] [blame] | 1812 | put_unused_fd(fd2); |
| 1813 | put_unused_fd(fd1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1814 | return err; |
| 1815 | } |
| 1816 | |
Dominik Brodowski | 6debc8d | 2018-03-13 19:49:23 +0100 | [diff] [blame] | 1817 | SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol, |
| 1818 | int __user *, usockvec) |
| 1819 | { |
| 1820 | return __sys_socketpair(family, type, protocol, usockvec); |
| 1821 | } |
| 1822 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1823 | /* |
| 1824 | * Bind a name to a socket. Nothing much to do here since it's |
| 1825 | * the protocol's responsibility to handle the local address. |
| 1826 | * |
| 1827 | * We move the socket address to kernel space before we call |
| 1828 | * the protocol layer (having also checked the address is ok). |
| 1829 | */ |
| 1830 | |
Dominik Brodowski | a87d35d | 2018-03-13 19:33:09 +0100 | [diff] [blame] | 1831 | int __sys_bind(int fd, struct sockaddr __user *umyaddr, int addrlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1832 | { |
| 1833 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1834 | struct sockaddr_storage address; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1835 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1836 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1837 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 1838 | if (sock) { |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 1839 | err = move_addr_to_kernel(umyaddr, addrlen, &address); |
Jakub Sitnicki | 068b88c | 2018-10-04 11:09:40 +0200 | [diff] [blame] | 1840 | if (!err) { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1841 | err = security_socket_bind(sock, |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1842 | (struct sockaddr *)&address, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1843 | addrlen); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1844 | if (!err) |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1845 | err = READ_ONCE(sock->ops)->bind(sock, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1846 | (struct sockaddr *) |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1847 | &address, addrlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1848 | } |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1849 | fput_light(sock->file, fput_needed); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1850 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1851 | return err; |
| 1852 | } |
| 1853 | |
Dominik Brodowski | a87d35d | 2018-03-13 19:33:09 +0100 | [diff] [blame] | 1854 | SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen) |
| 1855 | { |
| 1856 | return __sys_bind(fd, umyaddr, addrlen); |
| 1857 | } |
| 1858 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1859 | /* |
| 1860 | * Perform a listen. Basically, we allow the protocol to do anything |
| 1861 | * necessary for a listen, and if that works, we mark the socket as |
| 1862 | * ready for listening. |
| 1863 | */ |
| 1864 | |
Dominik Brodowski | 25e290e | 2018-03-13 19:36:54 +0100 | [diff] [blame] | 1865 | int __sys_listen(int fd, int backlog) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1866 | { |
| 1867 | struct socket *sock; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1868 | int err, fput_needed; |
Pavel Emelyanov | b8e1f9b | 2007-12-08 00:12:33 -0800 | [diff] [blame] | 1869 | int somaxconn; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1870 | |
| 1871 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1872 | if (sock) { |
Kuniyuki Iwashima | 3c9ba81 | 2022-08-23 10:47:00 -0700 | [diff] [blame] | 1873 | somaxconn = READ_ONCE(sock_net(sock->sk)->core.sysctl_somaxconn); |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 1874 | if ((unsigned int)backlog > somaxconn) |
Pavel Emelyanov | b8e1f9b | 2007-12-08 00:12:33 -0800 | [diff] [blame] | 1875 | backlog = somaxconn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1876 | |
| 1877 | err = security_socket_listen(sock, backlog); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1878 | if (!err) |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1879 | err = READ_ONCE(sock->ops)->listen(sock, backlog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1880 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1881 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1882 | } |
| 1883 | return err; |
| 1884 | } |
| 1885 | |
Dominik Brodowski | 25e290e | 2018-03-13 19:36:54 +0100 | [diff] [blame] | 1886 | SYSCALL_DEFINE2(listen, int, fd, int, backlog) |
| 1887 | { |
| 1888 | return __sys_listen(fd, backlog); |
| 1889 | } |
| 1890 | |
Pavel Begunkov | d32f89d | 2021-08-25 12:25:44 +0100 | [diff] [blame] | 1891 | struct file *do_accept(struct file *file, unsigned file_flags, |
Jens Axboe | de2ea4b | 2019-10-17 14:41:29 -0600 | [diff] [blame] | 1892 | struct sockaddr __user *upeer_sockaddr, |
Pavel Begunkov | d32f89d | 2021-08-25 12:25:44 +0100 | [diff] [blame] | 1893 | int __user *upeer_addrlen, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1894 | { |
| 1895 | struct socket *sock, *newsock; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1896 | struct file *newfile; |
Pavel Begunkov | d32f89d | 2021-08-25 12:25:44 +0100 | [diff] [blame] | 1897 | int err, len; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1898 | struct sockaddr_storage address; |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1899 | const struct proto_ops *ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1900 | |
Florent Revest | dba4a92 | 2020-12-04 12:36:04 +0100 | [diff] [blame] | 1901 | sock = sock_from_file(file); |
Pavel Begunkov | d32f89d | 2021-08-25 12:25:44 +0100 | [diff] [blame] | 1902 | if (!sock) |
| 1903 | return ERR_PTR(-ENOTSOCK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1904 | |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1905 | newsock = sock_alloc(); |
| 1906 | if (!newsock) |
Pavel Begunkov | d32f89d | 2021-08-25 12:25:44 +0100 | [diff] [blame] | 1907 | return ERR_PTR(-ENFILE); |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1908 | ops = READ_ONCE(sock->ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1909 | |
| 1910 | newsock->type = sock->type; |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1911 | newsock->ops = ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1912 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1913 | /* |
| 1914 | * We don't need try_module_get here, as the listening socket (sock) |
| 1915 | * has the protocol module (sock->ops->owner) held. |
| 1916 | */ |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1917 | __module_get(ops->owner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1918 | |
Linus Torvalds | aab174f | 2012-10-02 20:25:04 -0700 | [diff] [blame] | 1919 | newfile = sock_alloc_file(newsock, flags, sock->sk->sk_prot_creator->name); |
Pavel Begunkov | d32f89d | 2021-08-25 12:25:44 +0100 | [diff] [blame] | 1920 | if (IS_ERR(newfile)) |
| 1921 | return newfile; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1922 | |
Frank Filz | a79af59 | 2005-09-27 15:23:38 -0700 | [diff] [blame] | 1923 | err = security_socket_accept(sock, newsock); |
| 1924 | if (err) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1925 | goto out_fd; |
Frank Filz | a79af59 | 2005-09-27 15:23:38 -0700 | [diff] [blame] | 1926 | |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1927 | err = ops->accept(sock, newsock, sock->file->f_flags | file_flags, |
Jens Axboe | de2ea4b | 2019-10-17 14:41:29 -0600 | [diff] [blame] | 1928 | false); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1929 | if (err < 0) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1930 | goto out_fd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1931 | |
| 1932 | if (upeer_sockaddr) { |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 1933 | len = ops->getname(newsock, (struct sockaddr *)&address, 2); |
Denys Vlasenko | 9b2c45d | 2018-02-12 20:00:20 +0100 | [diff] [blame] | 1934 | if (len < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1935 | err = -ECONNABORTED; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1936 | goto out_fd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1937 | } |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 1938 | err = move_addr_to_user(&address, |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1939 | len, upeer_sockaddr, upeer_addrlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1940 | if (err < 0) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1941 | goto out_fd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1942 | } |
| 1943 | |
| 1944 | /* File flags are not inherited via accept() unlike another OSes. */ |
Pavel Begunkov | d32f89d | 2021-08-25 12:25:44 +0100 | [diff] [blame] | 1945 | return newfile; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1946 | out_fd: |
David S. Miller | 9606a21 | 2006-04-01 01:00:14 -0800 | [diff] [blame] | 1947 | fput(newfile); |
Pavel Begunkov | d32f89d | 2021-08-25 12:25:44 +0100 | [diff] [blame] | 1948 | return ERR_PTR(err); |
| 1949 | } |
Jens Axboe | de2ea4b | 2019-10-17 14:41:29 -0600 | [diff] [blame] | 1950 | |
Yajun Deng | c042453 | 2022-06-10 17:10:17 +0800 | [diff] [blame] | 1951 | static int __sys_accept4_file(struct file *file, struct sockaddr __user *upeer_sockaddr, |
| 1952 | int __user *upeer_addrlen, int flags) |
Pavel Begunkov | d32f89d | 2021-08-25 12:25:44 +0100 | [diff] [blame] | 1953 | { |
| 1954 | struct file *newfile; |
| 1955 | int newfd; |
| 1956 | |
| 1957 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
| 1958 | return -EINVAL; |
| 1959 | |
| 1960 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
| 1961 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
| 1962 | |
Yajun Deng | c042453 | 2022-06-10 17:10:17 +0800 | [diff] [blame] | 1963 | newfd = get_unused_fd_flags(flags); |
Pavel Begunkov | d32f89d | 2021-08-25 12:25:44 +0100 | [diff] [blame] | 1964 | if (unlikely(newfd < 0)) |
| 1965 | return newfd; |
| 1966 | |
Yajun Deng | c042453 | 2022-06-10 17:10:17 +0800 | [diff] [blame] | 1967 | newfile = do_accept(file, 0, upeer_sockaddr, upeer_addrlen, |
Pavel Begunkov | d32f89d | 2021-08-25 12:25:44 +0100 | [diff] [blame] | 1968 | flags); |
| 1969 | if (IS_ERR(newfile)) { |
| 1970 | put_unused_fd(newfd); |
| 1971 | return PTR_ERR(newfile); |
| 1972 | } |
| 1973 | fd_install(newfd, newfile); |
| 1974 | return newfd; |
Jens Axboe | de2ea4b | 2019-10-17 14:41:29 -0600 | [diff] [blame] | 1975 | } |
| 1976 | |
| 1977 | /* |
| 1978 | * For accept, we attempt to create a new socket, set up the link |
| 1979 | * with the client, wake up the client, then return the new |
| 1980 | * connected fd. We collect the address of the connector in kernel |
| 1981 | * space and move it to user at the very end. This is unclean because |
| 1982 | * we open the socket then return an error. |
| 1983 | * |
| 1984 | * 1003.1g adds the ability to recvmsg() to query connection pending |
| 1985 | * status to recvmsg. We need to add that support in a way thats |
| 1986 | * clean when we restructure accept also. |
| 1987 | */ |
| 1988 | |
| 1989 | int __sys_accept4(int fd, struct sockaddr __user *upeer_sockaddr, |
| 1990 | int __user *upeer_addrlen, int flags) |
| 1991 | { |
| 1992 | int ret = -EBADF; |
| 1993 | struct fd f; |
| 1994 | |
| 1995 | f = fdget(fd); |
| 1996 | if (f.file) { |
Yajun Deng | c042453 | 2022-06-10 17:10:17 +0800 | [diff] [blame] | 1997 | ret = __sys_accept4_file(f.file, upeer_sockaddr, |
| 1998 | upeer_addrlen, flags); |
Miaohe Lin | 6b07ede | 2020-08-06 19:52:24 +0800 | [diff] [blame] | 1999 | fdput(f); |
Jens Axboe | de2ea4b | 2019-10-17 14:41:29 -0600 | [diff] [blame] | 2000 | } |
| 2001 | |
| 2002 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2003 | } |
| 2004 | |
Dominik Brodowski | 4541e80 | 2018-03-13 19:24:23 +0100 | [diff] [blame] | 2005 | SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, |
| 2006 | int __user *, upeer_addrlen, int, flags) |
| 2007 | { |
| 2008 | return __sys_accept4(fd, upeer_sockaddr, upeer_addrlen, flags); |
| 2009 | } |
| 2010 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 2011 | SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, |
| 2012 | int __user *, upeer_addrlen) |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 2013 | { |
Dominik Brodowski | 4541e80 | 2018-03-13 19:24:23 +0100 | [diff] [blame] | 2014 | return __sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 2015 | } |
| 2016 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2017 | /* |
| 2018 | * Attempt to connect to a socket with the server address. The address |
| 2019 | * is in user space so we verify it is OK and move it to kernel space. |
| 2020 | * |
| 2021 | * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to |
| 2022 | * break bindings |
| 2023 | * |
| 2024 | * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and |
| 2025 | * other SEQPACKET protocols that take time to connect() as it doesn't |
| 2026 | * include the -EINPROGRESS status for such sockets. |
| 2027 | */ |
| 2028 | |
Jens Axboe | f499a02 | 2019-12-02 16:28:46 -0700 | [diff] [blame] | 2029 | int __sys_connect_file(struct file *file, struct sockaddr_storage *address, |
Jens Axboe | bd3ded3 | 2019-11-23 14:17:16 -0700 | [diff] [blame] | 2030 | int addrlen, int file_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2031 | { |
| 2032 | struct socket *sock; |
Jens Axboe | bd3ded3 | 2019-11-23 14:17:16 -0700 | [diff] [blame] | 2033 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2034 | |
Florent Revest | dba4a92 | 2020-12-04 12:36:04 +0100 | [diff] [blame] | 2035 | sock = sock_from_file(file); |
| 2036 | if (!sock) { |
| 2037 | err = -ENOTSOCK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2038 | goto out; |
Florent Revest | dba4a92 | 2020-12-04 12:36:04 +0100 | [diff] [blame] | 2039 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2040 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2041 | err = |
Jens Axboe | f499a02 | 2019-12-02 16:28:46 -0700 | [diff] [blame] | 2042 | security_socket_connect(sock, (struct sockaddr *)address, addrlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2043 | if (err) |
Jens Axboe | bd3ded3 | 2019-11-23 14:17:16 -0700 | [diff] [blame] | 2044 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2045 | |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 2046 | err = READ_ONCE(sock->ops)->connect(sock, (struct sockaddr *)address, |
| 2047 | addrlen, sock->file->f_flags | file_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2048 | out: |
| 2049 | return err; |
| 2050 | } |
| 2051 | |
Jens Axboe | bd3ded3 | 2019-11-23 14:17:16 -0700 | [diff] [blame] | 2052 | int __sys_connect(int fd, struct sockaddr __user *uservaddr, int addrlen) |
| 2053 | { |
| 2054 | int ret = -EBADF; |
| 2055 | struct fd f; |
| 2056 | |
| 2057 | f = fdget(fd); |
| 2058 | if (f.file) { |
Jens Axboe | f499a02 | 2019-12-02 16:28:46 -0700 | [diff] [blame] | 2059 | struct sockaddr_storage address; |
| 2060 | |
| 2061 | ret = move_addr_to_kernel(uservaddr, addrlen, &address); |
| 2062 | if (!ret) |
| 2063 | ret = __sys_connect_file(f.file, &address, addrlen, 0); |
Miaohe Lin | 6b07ede | 2020-08-06 19:52:24 +0800 | [diff] [blame] | 2064 | fdput(f); |
Jens Axboe | bd3ded3 | 2019-11-23 14:17:16 -0700 | [diff] [blame] | 2065 | } |
| 2066 | |
| 2067 | return ret; |
| 2068 | } |
| 2069 | |
Dominik Brodowski | 1387c2c | 2018-03-13 19:35:09 +0100 | [diff] [blame] | 2070 | SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, |
| 2071 | int, addrlen) |
| 2072 | { |
| 2073 | return __sys_connect(fd, uservaddr, addrlen); |
| 2074 | } |
| 2075 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2076 | /* |
| 2077 | * Get the local address ('name') of a socket object. Move the obtained |
| 2078 | * name to user space. |
| 2079 | */ |
| 2080 | |
Dominik Brodowski | 8882a10 | 2018-03-13 19:43:14 +0100 | [diff] [blame] | 2081 | int __sys_getsockname(int fd, struct sockaddr __user *usockaddr, |
| 2082 | int __user *usockaddr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2083 | { |
| 2084 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 2085 | struct sockaddr_storage address; |
Denys Vlasenko | 9b2c45d | 2018-02-12 20:00:20 +0100 | [diff] [blame] | 2086 | int err, fput_needed; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2087 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2088 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2089 | if (!sock) |
| 2090 | goto out; |
| 2091 | |
| 2092 | err = security_socket_getsockname(sock); |
| 2093 | if (err) |
| 2094 | goto out_put; |
| 2095 | |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 2096 | err = READ_ONCE(sock->ops)->getname(sock, (struct sockaddr *)&address, 0); |
Denys Vlasenko | 9b2c45d | 2018-02-12 20:00:20 +0100 | [diff] [blame] | 2097 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2098 | goto out_put; |
Hamish MacDonald | e44ef1d | 2022-01-01 22:38:25 +1000 | [diff] [blame] | 2099 | /* "err" is actually length in this case */ |
Denys Vlasenko | 9b2c45d | 2018-02-12 20:00:20 +0100 | [diff] [blame] | 2100 | err = move_addr_to_user(&address, err, usockaddr, usockaddr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2101 | |
| 2102 | out_put: |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2103 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2104 | out: |
| 2105 | return err; |
| 2106 | } |
| 2107 | |
Dominik Brodowski | 8882a10 | 2018-03-13 19:43:14 +0100 | [diff] [blame] | 2108 | SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, |
| 2109 | int __user *, usockaddr_len) |
| 2110 | { |
| 2111 | return __sys_getsockname(fd, usockaddr, usockaddr_len); |
| 2112 | } |
| 2113 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2114 | /* |
| 2115 | * Get the remote address ('name') of a socket object. Move the obtained |
| 2116 | * name to user space. |
| 2117 | */ |
| 2118 | |
Dominik Brodowski | b21c8f8 | 2018-03-13 19:47:00 +0100 | [diff] [blame] | 2119 | int __sys_getpeername(int fd, struct sockaddr __user *usockaddr, |
| 2120 | int __user *usockaddr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2121 | { |
| 2122 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 2123 | struct sockaddr_storage address; |
Denys Vlasenko | 9b2c45d | 2018-02-12 20:00:20 +0100 | [diff] [blame] | 2124 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2125 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2126 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 2127 | if (sock != NULL) { |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 2128 | const struct proto_ops *ops = READ_ONCE(sock->ops); |
| 2129 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2130 | err = security_socket_getpeername(sock); |
| 2131 | if (err) { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2132 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2133 | return err; |
| 2134 | } |
| 2135 | |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 2136 | err = ops->getname(sock, (struct sockaddr *)&address, 1); |
Denys Vlasenko | 9b2c45d | 2018-02-12 20:00:20 +0100 | [diff] [blame] | 2137 | if (err >= 0) |
| 2138 | /* "err" is actually length in this case */ |
| 2139 | err = move_addr_to_user(&address, err, usockaddr, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2140 | usockaddr_len); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2141 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2142 | } |
| 2143 | return err; |
| 2144 | } |
| 2145 | |
Dominik Brodowski | b21c8f8 | 2018-03-13 19:47:00 +0100 | [diff] [blame] | 2146 | SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, |
| 2147 | int __user *, usockaddr_len) |
| 2148 | { |
| 2149 | return __sys_getpeername(fd, usockaddr, usockaddr_len); |
| 2150 | } |
| 2151 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2152 | /* |
| 2153 | * Send a datagram to a given address. We move the address into kernel |
| 2154 | * space and check the user space data area is readable before invoking |
| 2155 | * the protocol. |
| 2156 | */ |
Dominik Brodowski | 211b634 | 2018-03-13 19:18:52 +0100 | [diff] [blame] | 2157 | int __sys_sendto(int fd, void __user *buff, size_t len, unsigned int flags, |
| 2158 | struct sockaddr __user *addr, int addr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2159 | { |
| 2160 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 2161 | struct sockaddr_storage address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2162 | int err; |
| 2163 | struct msghdr msg; |
| 2164 | struct iovec iov; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2165 | int fput_needed; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2166 | |
Al Viro | de4eda9 | 2022-09-15 20:25:47 -0400 | [diff] [blame] | 2167 | err = import_single_range(ITER_SOURCE, buff, len, &iov, &msg.msg_iter); |
Al Viro | 602bd0e | 2015-03-21 19:12:32 -0400 | [diff] [blame] | 2168 | if (unlikely(err)) |
| 2169 | return err; |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 2170 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 2171 | if (!sock) |
David S. Miller | 4387ff75 | 2007-02-08 15:06:08 -0800 | [diff] [blame] | 2172 | goto out; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2173 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2174 | msg.msg_name = NULL; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2175 | msg.msg_control = NULL; |
| 2176 | msg.msg_controllen = 0; |
| 2177 | msg.msg_namelen = 0; |
Pavel Begunkov | 7c701d9 | 2022-07-12 21:52:29 +0100 | [diff] [blame] | 2178 | msg.msg_ubuf = NULL; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2179 | if (addr) { |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 2180 | err = move_addr_to_kernel(addr, addr_len, &address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2181 | if (err < 0) |
| 2182 | goto out_put; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 2183 | msg.msg_name = (struct sockaddr *)&address; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2184 | msg.msg_namelen = addr_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2185 | } |
David Howells | b841b90 | 2023-05-22 13:11:10 +0100 | [diff] [blame] | 2186 | flags &= ~MSG_INTERNAL_SENDMSG_FLAGS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2187 | if (sock->file->f_flags & O_NONBLOCK) |
| 2188 | flags |= MSG_DONTWAIT; |
| 2189 | msg.msg_flags = flags; |
Jordan Rife | 86a7e0b | 2023-09-21 18:46:41 -0500 | [diff] [blame] | 2190 | err = __sock_sendmsg(sock, &msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2191 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2192 | out_put: |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 2193 | fput_light(sock->file, fput_needed); |
David S. Miller | 4387ff75 | 2007-02-08 15:06:08 -0800 | [diff] [blame] | 2194 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2195 | return err; |
| 2196 | } |
| 2197 | |
Dominik Brodowski | 211b634 | 2018-03-13 19:18:52 +0100 | [diff] [blame] | 2198 | SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, |
| 2199 | unsigned int, flags, struct sockaddr __user *, addr, |
| 2200 | int, addr_len) |
| 2201 | { |
| 2202 | return __sys_sendto(fd, buff, len, flags, addr, addr_len); |
| 2203 | } |
| 2204 | |
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 | * Send a datagram down a socket. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2207 | */ |
| 2208 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 2209 | SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len, |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 2210 | unsigned int, flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2211 | { |
Dominik Brodowski | 211b634 | 2018-03-13 19:18:52 +0100 | [diff] [blame] | 2212 | return __sys_sendto(fd, buff, len, flags, NULL, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2213 | } |
| 2214 | |
| 2215 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2216 | * 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] | 2217 | * sender. We verify the buffers are writable and if needed move the |
| 2218 | * sender address from kernel to user space. |
| 2219 | */ |
Dominik Brodowski | 7a09e1e | 2018-03-13 19:10:06 +0100 | [diff] [blame] | 2220 | int __sys_recvfrom(int fd, void __user *ubuf, size_t size, unsigned int flags, |
| 2221 | struct sockaddr __user *addr, int __user *addr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2222 | { |
Eric Dumazet | 1228b34 | 2022-06-22 15:02:20 +0000 | [diff] [blame] | 2223 | struct sockaddr_storage address; |
| 2224 | struct msghdr msg = { |
| 2225 | /* Save some cycles and don't copy the address if not needed */ |
| 2226 | .msg_name = addr ? (struct sockaddr *)&address : NULL, |
| 2227 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2228 | struct socket *sock; |
| 2229 | struct iovec iov; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2230 | int err, err2; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2231 | int fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2232 | |
Al Viro | de4eda9 | 2022-09-15 20:25:47 -0400 | [diff] [blame] | 2233 | err = import_single_range(ITER_DEST, ubuf, size, &iov, &msg.msg_iter); |
Al Viro | 602bd0e | 2015-03-21 19:12:32 -0400 | [diff] [blame] | 2234 | if (unlikely(err)) |
| 2235 | return err; |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 2236 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2237 | if (!sock) |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 2238 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2239 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2240 | if (sock->file->f_flags & O_NONBLOCK) |
| 2241 | flags |= MSG_DONTWAIT; |
Al Viro | 2da6290 | 2015-03-14 21:13:46 -0400 | [diff] [blame] | 2242 | err = sock_recvmsg(sock, &msg, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2243 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2244 | if (err >= 0 && addr != NULL) { |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 2245 | err2 = move_addr_to_user(&address, |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 2246 | msg.msg_namelen, addr, addr_len); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2247 | if (err2 < 0) |
| 2248 | err = err2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2249 | } |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 2250 | |
| 2251 | fput_light(sock->file, fput_needed); |
David S. Miller | 4387ff75 | 2007-02-08 15:06:08 -0800 | [diff] [blame] | 2252 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2253 | return err; |
| 2254 | } |
| 2255 | |
Dominik Brodowski | 7a09e1e | 2018-03-13 19:10:06 +0100 | [diff] [blame] | 2256 | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, |
| 2257 | unsigned int, flags, struct sockaddr __user *, addr, |
| 2258 | int __user *, addr_len) |
| 2259 | { |
| 2260 | return __sys_recvfrom(fd, ubuf, size, flags, addr, addr_len); |
| 2261 | } |
| 2262 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2263 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2264 | * Receive a datagram from a socket. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2265 | */ |
| 2266 | |
Jan Glauber | b7c0ddf | 2014-04-16 09:32:48 +0200 | [diff] [blame] | 2267 | SYSCALL_DEFINE4(recv, int, fd, void __user *, ubuf, size_t, size, |
| 2268 | unsigned int, flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2269 | { |
Dominik Brodowski | 7a09e1e | 2018-03-13 19:10:06 +0100 | [diff] [blame] | 2270 | return __sys_recvfrom(fd, ubuf, size, flags, NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2271 | } |
| 2272 | |
Florian Westphal | 83f0c10 | 2020-07-05 01:30:15 +0200 | [diff] [blame] | 2273 | static bool sock_use_custom_sol_socket(const struct socket *sock) |
| 2274 | { |
Paolo Abeni | a5ef058 | 2022-10-20 19:48:51 +0200 | [diff] [blame] | 2275 | return test_bit(SOCK_CUSTOM_SOCKOPT, &sock->flags); |
Florian Westphal | 83f0c10 | 2020-07-05 01:30:15 +0200 | [diff] [blame] | 2276 | } |
| 2277 | |
Breno Leitao | 1406245 | 2023-10-16 06:47:41 -0700 | [diff] [blame] | 2278 | int do_sock_setsockopt(struct socket *sock, bool compat, int level, |
| 2279 | int optname, sockptr_t optval, int optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2280 | { |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 2281 | const struct proto_ops *ops; |
Stanislav Fomichev | 0d01da6 | 2019-06-27 13:38:47 -0700 | [diff] [blame] | 2282 | char *kernel_optval = NULL; |
Breno Leitao | 1406245 | 2023-10-16 06:47:41 -0700 | [diff] [blame] | 2283 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2284 | |
| 2285 | if (optlen < 0) |
| 2286 | return -EINVAL; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2287 | |
Christoph Hellwig | 4a36729 | 2020-07-17 08:23:11 +0200 | [diff] [blame] | 2288 | err = security_socket_setsockopt(sock, level, optname); |
| 2289 | if (err) |
| 2290 | goto out_put; |
Stanislav Fomichev | 0d01da6 | 2019-06-27 13:38:47 -0700 | [diff] [blame] | 2291 | |
Breno Leitao | 1406245 | 2023-10-16 06:47:41 -0700 | [diff] [blame] | 2292 | if (!compat) |
Christoph Hellwig | 55db9c0 | 2020-07-17 08:23:15 +0200 | [diff] [blame] | 2293 | err = BPF_CGROUP_RUN_PROG_SETSOCKOPT(sock->sk, &level, &optname, |
Breno Leitao | 3f31e0d | 2023-10-16 06:47:40 -0700 | [diff] [blame] | 2294 | optval, &optlen, |
Christoph Hellwig | 55db9c0 | 2020-07-17 08:23:15 +0200 | [diff] [blame] | 2295 | &kernel_optval); |
Christoph Hellwig | 4a36729 | 2020-07-17 08:23:11 +0200 | [diff] [blame] | 2296 | if (err < 0) |
| 2297 | goto out_put; |
| 2298 | if (err > 0) { |
| 2299 | err = 0; |
| 2300 | goto out_put; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2301 | } |
Christoph Hellwig | 4a36729 | 2020-07-17 08:23:11 +0200 | [diff] [blame] | 2302 | |
Christoph Hellwig | a7b75c5 | 2020-07-23 08:09:07 +0200 | [diff] [blame] | 2303 | if (kernel_optval) |
| 2304 | optval = KERNEL_SOCKPTR(kernel_optval); |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 2305 | ops = READ_ONCE(sock->ops); |
Christoph Hellwig | 4a36729 | 2020-07-17 08:23:11 +0200 | [diff] [blame] | 2306 | if (level == SOL_SOCKET && !sock_use_custom_sol_socket(sock)) |
Christoph Hellwig | a7b75c5 | 2020-07-23 08:09:07 +0200 | [diff] [blame] | 2307 | err = sock_setsockopt(sock, level, optname, optval, optlen); |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 2308 | else if (unlikely(!ops->setsockopt)) |
Christoph Hellwig | a44d9e7 | 2020-07-17 08:23:31 +0200 | [diff] [blame] | 2309 | err = -EOPNOTSUPP; |
Christoph Hellwig | 4a36729 | 2020-07-17 08:23:11 +0200 | [diff] [blame] | 2310 | else |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 2311 | err = ops->setsockopt(sock, level, optname, optval, |
Christoph Hellwig | 4a36729 | 2020-07-17 08:23:11 +0200 | [diff] [blame] | 2312 | optlen); |
Christoph Hellwig | a7b75c5 | 2020-07-23 08:09:07 +0200 | [diff] [blame] | 2313 | kfree(kernel_optval); |
Christoph Hellwig | 4a36729 | 2020-07-17 08:23:11 +0200 | [diff] [blame] | 2314 | out_put: |
Breno Leitao | 1406245 | 2023-10-16 06:47:41 -0700 | [diff] [blame] | 2315 | return err; |
| 2316 | } |
| 2317 | EXPORT_SYMBOL(do_sock_setsockopt); |
| 2318 | |
| 2319 | /* Set a socket option. Because we don't know the option lengths we have |
| 2320 | * to pass the user mode parameter for the protocols to sort out. |
| 2321 | */ |
| 2322 | int __sys_setsockopt(int fd, int level, int optname, char __user *user_optval, |
| 2323 | int optlen) |
| 2324 | { |
| 2325 | sockptr_t optval = USER_SOCKPTR(user_optval); |
| 2326 | bool compat = in_compat_syscall(); |
| 2327 | int err, fput_needed; |
| 2328 | struct socket *sock; |
| 2329 | |
| 2330 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 2331 | if (!sock) |
| 2332 | return err; |
| 2333 | |
| 2334 | err = do_sock_setsockopt(sock, compat, level, optname, optval, optlen); |
| 2335 | |
Christoph Hellwig | 4a36729 | 2020-07-17 08:23:11 +0200 | [diff] [blame] | 2336 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2337 | return err; |
| 2338 | } |
| 2339 | |
Dominik Brodowski | cc36dca | 2018-03-13 20:10:59 +0100 | [diff] [blame] | 2340 | SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, |
| 2341 | char __user *, optval, int, optlen) |
| 2342 | { |
| 2343 | return __sys_setsockopt(fd, level, optname, optval, optlen); |
| 2344 | } |
| 2345 | |
Stanislav Fomichev | 9cacf81 | 2021-01-15 08:34:59 -0800 | [diff] [blame] | 2346 | INDIRECT_CALLABLE_DECLARE(bool tcp_bpf_bypass_getsockopt(int level, |
| 2347 | int optname)); |
| 2348 | |
Breno Leitao | 0b05b0c | 2023-10-16 06:47:42 -0700 | [diff] [blame] | 2349 | int do_sock_getsockopt(struct socket *sock, bool compat, int level, |
| 2350 | int optname, sockptr_t optval, sockptr_t optlen) |
| 2351 | { |
| 2352 | int max_optlen __maybe_unused; |
| 2353 | const struct proto_ops *ops; |
| 2354 | int err; |
| 2355 | |
| 2356 | err = security_socket_getsockopt(sock, level, optname); |
| 2357 | if (err) |
| 2358 | return err; |
| 2359 | |
| 2360 | if (!compat) |
| 2361 | max_optlen = BPF_CGROUP_GETSOCKOPT_MAX_OPTLEN(optlen); |
| 2362 | |
| 2363 | ops = READ_ONCE(sock->ops); |
| 2364 | if (level == SOL_SOCKET) { |
| 2365 | err = sk_getsockopt(sock->sk, level, optname, optval, optlen); |
| 2366 | } else if (unlikely(!ops->getsockopt)) { |
| 2367 | err = -EOPNOTSUPP; |
| 2368 | } else { |
| 2369 | if (WARN_ONCE(optval.is_kernel || optlen.is_kernel, |
| 2370 | "Invalid argument type")) |
| 2371 | return -EOPNOTSUPP; |
| 2372 | |
| 2373 | err = ops->getsockopt(sock, level, optname, optval.user, |
| 2374 | optlen.user); |
| 2375 | } |
| 2376 | |
| 2377 | if (!compat) |
| 2378 | err = BPF_CGROUP_RUN_PROG_GETSOCKOPT(sock->sk, level, optname, |
| 2379 | optval, optlen, max_optlen, |
| 2380 | err); |
| 2381 | |
| 2382 | return err; |
| 2383 | } |
| 2384 | EXPORT_SYMBOL(do_sock_getsockopt); |
| 2385 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2386 | /* |
| 2387 | * Get a socket option. Because we don't know the option lengths we have |
| 2388 | * to pass a user mode parameter for the protocols to sort out. |
| 2389 | */ |
Christoph Hellwig | 55db9c0 | 2020-07-17 08:23:15 +0200 | [diff] [blame] | 2390 | int __sys_getsockopt(int fd, int level, int optname, char __user *optval, |
| 2391 | int __user *optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2392 | { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2393 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2394 | struct socket *sock; |
Breno Leitao | 0b05b0c | 2023-10-16 06:47:42 -0700 | [diff] [blame] | 2395 | bool compat; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2396 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2397 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Christoph Hellwig | d8a9b38 | 2020-07-17 08:23:12 +0200 | [diff] [blame] | 2398 | if (!sock) |
| 2399 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2400 | |
Breno Leitao | 0b05b0c | 2023-10-16 06:47:42 -0700 | [diff] [blame] | 2401 | compat = in_compat_syscall(); |
| 2402 | err = do_sock_getsockopt(sock, compat, level, optname, |
| 2403 | USER_SOCKPTR(optval), USER_SOCKPTR(optlen)); |
Stanislav Fomichev | 0d01da6 | 2019-06-27 13:38:47 -0700 | [diff] [blame] | 2404 | |
Christoph Hellwig | d8a9b38 | 2020-07-17 08:23:12 +0200 | [diff] [blame] | 2405 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2406 | return err; |
| 2407 | } |
| 2408 | |
Dominik Brodowski | 13a2d70 | 2018-03-13 20:15:04 +0100 | [diff] [blame] | 2409 | SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, |
| 2410 | char __user *, optval, int __user *, optlen) |
| 2411 | { |
| 2412 | return __sys_getsockopt(fd, level, optname, optval, optlen); |
| 2413 | } |
| 2414 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2415 | /* |
| 2416 | * Shutdown a socket. |
| 2417 | */ |
| 2418 | |
Jens Axboe | b713c19 | 2020-09-05 11:13:35 -0600 | [diff] [blame] | 2419 | int __sys_shutdown_sock(struct socket *sock, int how) |
| 2420 | { |
| 2421 | int err; |
| 2422 | |
| 2423 | err = security_socket_shutdown(sock, how); |
| 2424 | if (!err) |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 2425 | err = READ_ONCE(sock->ops)->shutdown(sock, how); |
Jens Axboe | b713c19 | 2020-09-05 11:13:35 -0600 | [diff] [blame] | 2426 | |
| 2427 | return err; |
| 2428 | } |
| 2429 | |
Dominik Brodowski | 005a1ae | 2018-03-13 20:07:05 +0100 | [diff] [blame] | 2430 | int __sys_shutdown(int fd, int how) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2431 | { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2432 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2433 | struct socket *sock; |
| 2434 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2435 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 2436 | if (sock != NULL) { |
Jens Axboe | b713c19 | 2020-09-05 11:13:35 -0600 | [diff] [blame] | 2437 | err = __sys_shutdown_sock(sock, how); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2438 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2439 | } |
| 2440 | return err; |
| 2441 | } |
| 2442 | |
Dominik Brodowski | 005a1ae | 2018-03-13 20:07:05 +0100 | [diff] [blame] | 2443 | SYSCALL_DEFINE2(shutdown, int, fd, int, how) |
| 2444 | { |
| 2445 | return __sys_shutdown(fd, how); |
| 2446 | } |
| 2447 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2448 | /* 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] | 2449 | * fields which are the same type (int / unsigned) on our platforms. |
| 2450 | */ |
| 2451 | #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member) |
| 2452 | #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen) |
| 2453 | #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags) |
| 2454 | |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2455 | struct used_address { |
| 2456 | struct sockaddr_storage name; |
| 2457 | unsigned int name_len; |
| 2458 | }; |
| 2459 | |
Dylan Yudaken | 7fa875b | 2022-07-14 04:02:56 -0700 | [diff] [blame] | 2460 | int __copy_msghdr(struct msghdr *kmsg, |
| 2461 | struct user_msghdr *msg, |
| 2462 | struct sockaddr __user **save_addr) |
Dan Carpenter | 1661bf3 | 2013-10-03 00:27:20 +0300 | [diff] [blame] | 2463 | { |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 2464 | ssize_t err; |
| 2465 | |
Christoph Hellwig | 1f466e1 | 2020-05-11 13:59:13 +0200 | [diff] [blame] | 2466 | kmsg->msg_control_is_user = true; |
Eric Dumazet | 1228b34 | 2022-06-22 15:02:20 +0000 | [diff] [blame] | 2467 | kmsg->msg_get_inq = 0; |
Dylan Yudaken | 7fa875b | 2022-07-14 04:02:56 -0700 | [diff] [blame] | 2468 | kmsg->msg_control_user = msg->msg_control; |
| 2469 | kmsg->msg_controllen = msg->msg_controllen; |
| 2470 | kmsg->msg_flags = msg->msg_flags; |
Al Viro | ffb0755 | 2017-06-27 19:32:04 -0400 | [diff] [blame] | 2471 | |
Dylan Yudaken | 7fa875b | 2022-07-14 04:02:56 -0700 | [diff] [blame] | 2472 | kmsg->msg_namelen = msg->msg_namelen; |
| 2473 | if (!msg->msg_name) |
Ani Sinha | 6a2a2b3 | 2014-09-08 14:49:59 -0700 | [diff] [blame] | 2474 | kmsg->msg_namelen = 0; |
| 2475 | |
Matthew Leach | dbb490b | 2014-03-11 11:58:27 +0000 | [diff] [blame] | 2476 | if (kmsg->msg_namelen < 0) |
| 2477 | return -EINVAL; |
| 2478 | |
Dan Carpenter | 1661bf3 | 2013-10-03 00:27:20 +0300 | [diff] [blame] | 2479 | if (kmsg->msg_namelen > sizeof(struct sockaddr_storage)) |
Dan Carpenter | db31c55 | 2013-11-27 15:40:21 +0300 | [diff] [blame] | 2480 | kmsg->msg_namelen = sizeof(struct sockaddr_storage); |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 2481 | |
| 2482 | if (save_addr) |
Dylan Yudaken | 7fa875b | 2022-07-14 04:02:56 -0700 | [diff] [blame] | 2483 | *save_addr = msg->msg_name; |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 2484 | |
Dylan Yudaken | 7fa875b | 2022-07-14 04:02:56 -0700 | [diff] [blame] | 2485 | if (msg->msg_name && kmsg->msg_namelen) { |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 2486 | if (!save_addr) { |
Dylan Yudaken | 7fa875b | 2022-07-14 04:02:56 -0700 | [diff] [blame] | 2487 | err = move_addr_to_kernel(msg->msg_name, |
Paolo Abeni | 864d966 | 2017-07-21 18:49:45 +0200 | [diff] [blame] | 2488 | kmsg->msg_namelen, |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 2489 | kmsg->msg_name); |
| 2490 | if (err < 0) |
| 2491 | return err; |
| 2492 | } |
| 2493 | } else { |
| 2494 | kmsg->msg_name = NULL; |
| 2495 | kmsg->msg_namelen = 0; |
| 2496 | } |
| 2497 | |
Dylan Yudaken | 7fa875b | 2022-07-14 04:02:56 -0700 | [diff] [blame] | 2498 | if (msg->msg_iovlen > UIO_MAXIOV) |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 2499 | return -EMSGSIZE; |
| 2500 | |
tadeusz.struk@intel.com | 0345f93 | 2015-03-19 12:31:25 -0700 | [diff] [blame] | 2501 | kmsg->msg_iocb = NULL; |
Pavel Begunkov | 7c701d9 | 2022-07-12 21:52:29 +0100 | [diff] [blame] | 2502 | kmsg->msg_ubuf = NULL; |
Jens Axboe | 0a384ab | 2020-02-27 08:11:20 -0700 | [diff] [blame] | 2503 | return 0; |
| 2504 | } |
| 2505 | |
| 2506 | static int copy_msghdr_from_user(struct msghdr *kmsg, |
| 2507 | struct user_msghdr __user *umsg, |
| 2508 | struct sockaddr __user **save_addr, |
| 2509 | struct iovec **iov) |
| 2510 | { |
| 2511 | struct user_msghdr msg; |
| 2512 | ssize_t err; |
| 2513 | |
Dylan Yudaken | 7fa875b | 2022-07-14 04:02:56 -0700 | [diff] [blame] | 2514 | if (copy_from_user(&msg, umsg, sizeof(*umsg))) |
| 2515 | return -EFAULT; |
| 2516 | |
| 2517 | err = __copy_msghdr(kmsg, &msg, save_addr); |
Jens Axboe | 0a384ab | 2020-02-27 08:11:20 -0700 | [diff] [blame] | 2518 | if (err) |
| 2519 | return err; |
tadeusz.struk@intel.com | 0345f93 | 2015-03-19 12:31:25 -0700 | [diff] [blame] | 2520 | |
Al Viro | de4eda9 | 2022-09-15 20:25:47 -0400 | [diff] [blame] | 2521 | err = import_iovec(save_addr ? ITER_DEST : ITER_SOURCE, |
Al Viro | ffb0755 | 2017-06-27 19:32:04 -0400 | [diff] [blame] | 2522 | msg.msg_iov, msg.msg_iovlen, |
Al Viro | da18428 | 2015-03-21 19:29:06 -0400 | [diff] [blame] | 2523 | UIO_FASTIOV, iov, &kmsg->msg_iter); |
Jens Axboe | 87e5e6d | 2019-05-14 16:02:22 -0600 | [diff] [blame] | 2524 | return err < 0 ? err : 0; |
Dan Carpenter | 1661bf3 | 2013-10-03 00:27:20 +0300 | [diff] [blame] | 2525 | } |
| 2526 | |
Jens Axboe | 4257c8c | 2019-11-25 14:27:34 -0700 | [diff] [blame] | 2527 | static int ____sys_sendmsg(struct socket *sock, struct msghdr *msg_sys, |
| 2528 | unsigned int flags, struct used_address *used_address, |
| 2529 | unsigned int allowed_msghdr_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2530 | { |
Alex Williamson | b9d717a | 2005-09-26 14:28:02 -0700 | [diff] [blame] | 2531 | unsigned char ctl[sizeof(struct cmsghdr) + 20] |
Amit Kushwaha | 846cc12 | 2016-12-08 18:21:53 +0530 | [diff] [blame] | 2532 | __aligned(sizeof(__kernel_size_t)); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2533 | /* 20 is size of ipv6_pktinfo */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2534 | unsigned char *ctl_buf = ctl; |
Al Viro | d8725c8 | 2014-12-11 00:02:50 -0500 | [diff] [blame] | 2535 | int ctl_len; |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 2536 | ssize_t err; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2537 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2538 | err = -ENOBUFS; |
| 2539 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2540 | if (msg_sys->msg_controllen > INT_MAX) |
Jens Axboe | 4257c8c | 2019-11-25 14:27:34 -0700 | [diff] [blame] | 2541 | goto out; |
Tom Herbert | 28a94d8 | 2016-03-07 14:11:02 -0800 | [diff] [blame] | 2542 | flags |= (msg_sys->msg_flags & allowed_msghdr_flags); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2543 | ctl_len = msg_sys->msg_controllen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2544 | if ((MSG_CMSG_COMPAT & flags) && ctl_len) { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2545 | err = |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2546 | cmsghdr_from_user_compat_to_kern(msg_sys, sock->sk, ctl, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2547 | sizeof(ctl)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2548 | if (err) |
Jens Axboe | 4257c8c | 2019-11-25 14:27:34 -0700 | [diff] [blame] | 2549 | goto out; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2550 | ctl_buf = msg_sys->msg_control; |
| 2551 | ctl_len = msg_sys->msg_controllen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2552 | } else if (ctl_len) { |
David S. Miller | ac4340f | 2017-01-04 13:24:19 -0500 | [diff] [blame] | 2553 | BUILD_BUG_ON(sizeof(struct cmsghdr) != |
| 2554 | CMSG_ALIGN(sizeof(struct cmsghdr))); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2555 | if (ctl_len > sizeof(ctl)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2556 | ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2557 | if (ctl_buf == NULL) |
Jens Axboe | 4257c8c | 2019-11-25 14:27:34 -0700 | [diff] [blame] | 2558 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2559 | } |
| 2560 | err = -EFAULT; |
Christoph Hellwig | 1f466e1 | 2020-05-11 13:59:13 +0200 | [diff] [blame] | 2561 | 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] | 2562 | goto out_freectl; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2563 | msg_sys->msg_control = ctl_buf; |
Christoph Hellwig | 1f466e1 | 2020-05-11 13:59:13 +0200 | [diff] [blame] | 2564 | msg_sys->msg_control_is_user = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2565 | } |
David Howells | b841b90 | 2023-05-22 13:11:10 +0100 | [diff] [blame] | 2566 | flags &= ~MSG_INTERNAL_SENDMSG_FLAGS; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2567 | msg_sys->msg_flags = flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2568 | |
| 2569 | if (sock->file->f_flags & O_NONBLOCK) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2570 | msg_sys->msg_flags |= MSG_DONTWAIT; |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2571 | /* |
| 2572 | * If this is sendmmsg() and current destination address is same as |
| 2573 | * previously succeeded address, omit asking LSM's decision. |
| 2574 | * used_address->name_len is initialized to UINT_MAX so that the first |
| 2575 | * destination address never matches. |
| 2576 | */ |
Mathieu Desnoyers | bc909d9 | 2011-08-24 19:45:03 -0700 | [diff] [blame] | 2577 | if (used_address && msg_sys->msg_name && |
| 2578 | used_address->name_len == msg_sys->msg_namelen && |
| 2579 | !memcmp(&used_address->name, msg_sys->msg_name, |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2580 | used_address->name_len)) { |
Al Viro | d8725c8 | 2014-12-11 00:02:50 -0500 | [diff] [blame] | 2581 | err = sock_sendmsg_nosec(sock, msg_sys); |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2582 | goto out_freectl; |
| 2583 | } |
Jordan Rife | 86a7e0b | 2023-09-21 18:46:41 -0500 | [diff] [blame] | 2584 | err = __sock_sendmsg(sock, msg_sys); |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2585 | /* |
| 2586 | * If this is sendmmsg() and sending to current destination address was |
| 2587 | * successful, remember it. |
| 2588 | */ |
| 2589 | if (used_address && err >= 0) { |
| 2590 | used_address->name_len = msg_sys->msg_namelen; |
Mathieu Desnoyers | bc909d9 | 2011-08-24 19:45:03 -0700 | [diff] [blame] | 2591 | if (msg_sys->msg_name) |
| 2592 | memcpy(&used_address->name, msg_sys->msg_name, |
| 2593 | used_address->name_len); |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2594 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2595 | |
| 2596 | out_freectl: |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2597 | if (ctl_buf != ctl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2598 | sock_kfree_s(sock->sk, ctl_buf, ctl_len); |
Jens Axboe | 4257c8c | 2019-11-25 14:27:34 -0700 | [diff] [blame] | 2599 | out: |
| 2600 | return err; |
| 2601 | } |
| 2602 | |
Jens Axboe | 03b1230 | 2019-12-02 18:50:25 -0700 | [diff] [blame] | 2603 | int sendmsg_copy_msghdr(struct msghdr *msg, |
| 2604 | struct user_msghdr __user *umsg, unsigned flags, |
| 2605 | struct iovec **iov) |
Jens Axboe | 4257c8c | 2019-11-25 14:27:34 -0700 | [diff] [blame] | 2606 | { |
| 2607 | int err; |
| 2608 | |
| 2609 | if (flags & MSG_CMSG_COMPAT) { |
| 2610 | struct compat_msghdr __user *msg_compat; |
| 2611 | |
| 2612 | msg_compat = (struct compat_msghdr __user *) umsg; |
| 2613 | err = get_compat_msghdr(msg, msg_compat, NULL, iov); |
| 2614 | } else { |
| 2615 | err = copy_msghdr_from_user(msg, umsg, NULL, iov); |
| 2616 | } |
| 2617 | if (err < 0) |
| 2618 | return err; |
| 2619 | |
| 2620 | return 0; |
| 2621 | } |
| 2622 | |
| 2623 | static int ___sys_sendmsg(struct socket *sock, struct user_msghdr __user *msg, |
| 2624 | struct msghdr *msg_sys, unsigned int flags, |
| 2625 | struct used_address *used_address, |
| 2626 | unsigned int allowed_msghdr_flags) |
| 2627 | { |
| 2628 | struct sockaddr_storage address; |
| 2629 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; |
| 2630 | ssize_t err; |
| 2631 | |
| 2632 | msg_sys->msg_name = &address; |
| 2633 | |
| 2634 | err = sendmsg_copy_msghdr(msg_sys, msg, flags, &iov); |
| 2635 | if (err < 0) |
| 2636 | return err; |
| 2637 | |
| 2638 | err = ____sys_sendmsg(sock, msg_sys, flags, used_address, |
| 2639 | allowed_msghdr_flags); |
Al Viro | da18428 | 2015-03-21 19:29:06 -0400 | [diff] [blame] | 2640 | kfree(iov); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2641 | return err; |
| 2642 | } |
| 2643 | |
| 2644 | /* |
| 2645 | * BSD sendmsg interface |
| 2646 | */ |
Jens Axboe | 03b1230 | 2019-12-02 18:50:25 -0700 | [diff] [blame] | 2647 | long __sys_sendmsg_sock(struct socket *sock, struct msghdr *msg, |
Jens Axboe | 0fa03c6 | 2019-04-19 13:34:07 -0600 | [diff] [blame] | 2648 | unsigned int flags) |
| 2649 | { |
Jens Axboe | 03b1230 | 2019-12-02 18:50:25 -0700 | [diff] [blame] | 2650 | return ____sys_sendmsg(sock, msg, flags, NULL, 0); |
Jens Axboe | 0fa03c6 | 2019-04-19 13:34:07 -0600 | [diff] [blame] | 2651 | } |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2652 | |
Dominik Brodowski | e1834a3 | 2018-03-13 20:35:57 +0100 | [diff] [blame] | 2653 | long __sys_sendmsg(int fd, struct user_msghdr __user *msg, unsigned int flags, |
| 2654 | bool forbid_cmsg_compat) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2655 | { |
| 2656 | int fput_needed, err; |
| 2657 | struct msghdr msg_sys; |
Andy Lutomirski | 1be374a | 2013-05-22 14:07:44 -0700 | [diff] [blame] | 2658 | struct socket *sock; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2659 | |
Dominik Brodowski | e1834a3 | 2018-03-13 20:35:57 +0100 | [diff] [blame] | 2660 | if (forbid_cmsg_compat && (flags & MSG_CMSG_COMPAT)) |
| 2661 | return -EINVAL; |
| 2662 | |
Andy Lutomirski | 1be374a | 2013-05-22 14:07:44 -0700 | [diff] [blame] | 2663 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2664 | if (!sock) |
| 2665 | goto out; |
| 2666 | |
Tom Herbert | 28a94d8 | 2016-03-07 14:11:02 -0800 | [diff] [blame] | 2667 | err = ___sys_sendmsg(sock, msg, &msg_sys, flags, NULL, 0); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2668 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2669 | fput_light(sock->file, fput_needed); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2670 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2671 | return err; |
| 2672 | } |
| 2673 | |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 2674 | 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] | 2675 | { |
Dominik Brodowski | e1834a3 | 2018-03-13 20:35:57 +0100 | [diff] [blame] | 2676 | return __sys_sendmsg(fd, msg, flags, true); |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2677 | } |
| 2678 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2679 | /* |
| 2680 | * Linux sendmmsg interface |
| 2681 | */ |
| 2682 | |
| 2683 | int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, |
Dominik Brodowski | e1834a3 | 2018-03-13 20:35:57 +0100 | [diff] [blame] | 2684 | unsigned int flags, bool forbid_cmsg_compat) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2685 | { |
| 2686 | int fput_needed, err, datagrams; |
| 2687 | struct socket *sock; |
| 2688 | struct mmsghdr __user *entry; |
| 2689 | struct compat_mmsghdr __user *compat_entry; |
| 2690 | struct msghdr msg_sys; |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2691 | struct used_address used_address; |
Tom Herbert | f092276 | 2016-03-07 14:11:03 -0800 | [diff] [blame] | 2692 | unsigned int oflags = flags; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2693 | |
Dominik Brodowski | e1834a3 | 2018-03-13 20:35:57 +0100 | [diff] [blame] | 2694 | if (forbid_cmsg_compat && (flags & MSG_CMSG_COMPAT)) |
| 2695 | return -EINVAL; |
| 2696 | |
Anton Blanchard | 98382f4 | 2011-08-04 14:07:39 +0000 | [diff] [blame] | 2697 | if (vlen > UIO_MAXIOV) |
| 2698 | vlen = UIO_MAXIOV; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2699 | |
| 2700 | datagrams = 0; |
| 2701 | |
| 2702 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 2703 | if (!sock) |
| 2704 | return err; |
| 2705 | |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2706 | used_address.name_len = UINT_MAX; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2707 | entry = mmsg; |
| 2708 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
Anton Blanchard | 728ffb8 | 2011-08-04 14:07:38 +0000 | [diff] [blame] | 2709 | err = 0; |
Tom Herbert | f092276 | 2016-03-07 14:11:03 -0800 | [diff] [blame] | 2710 | flags |= MSG_BATCH; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2711 | |
| 2712 | while (datagrams < vlen) { |
Tom Herbert | f092276 | 2016-03-07 14:11:03 -0800 | [diff] [blame] | 2713 | if (datagrams == vlen - 1) |
| 2714 | flags = oflags; |
| 2715 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2716 | if (MSG_CMSG_COMPAT & flags) { |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 2717 | err = ___sys_sendmsg(sock, (struct user_msghdr __user *)compat_entry, |
Tom Herbert | 28a94d8 | 2016-03-07 14:11:02 -0800 | [diff] [blame] | 2718 | &msg_sys, flags, &used_address, MSG_EOR); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2719 | if (err < 0) |
| 2720 | break; |
| 2721 | err = __put_user(err, &compat_entry->msg_len); |
| 2722 | ++compat_entry; |
| 2723 | } else { |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2724 | err = ___sys_sendmsg(sock, |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 2725 | (struct user_msghdr __user *)entry, |
Tom Herbert | 28a94d8 | 2016-03-07 14:11:02 -0800 | [diff] [blame] | 2726 | &msg_sys, flags, &used_address, MSG_EOR); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2727 | if (err < 0) |
| 2728 | break; |
| 2729 | err = put_user(err, &entry->msg_len); |
| 2730 | ++entry; |
| 2731 | } |
| 2732 | |
| 2733 | if (err) |
| 2734 | break; |
| 2735 | ++datagrams; |
Soheil Hassas Yeganeh | 3023898 | 2016-11-04 15:36:49 -0400 | [diff] [blame] | 2736 | if (msg_data_left(&msg_sys)) |
| 2737 | break; |
Eric Dumazet | a78cb84 | 2016-01-08 08:37:20 -0800 | [diff] [blame] | 2738 | cond_resched(); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2739 | } |
| 2740 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2741 | fput_light(sock->file, fput_needed); |
| 2742 | |
Anton Blanchard | 728ffb8 | 2011-08-04 14:07:38 +0000 | [diff] [blame] | 2743 | /* We only return an error if no datagrams were able to be sent */ |
| 2744 | if (datagrams != 0) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2745 | return datagrams; |
| 2746 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2747 | return err; |
| 2748 | } |
| 2749 | |
| 2750 | SYSCALL_DEFINE4(sendmmsg, int, fd, struct mmsghdr __user *, mmsg, |
| 2751 | unsigned int, vlen, unsigned int, flags) |
| 2752 | { |
Dominik Brodowski | e1834a3 | 2018-03-13 20:35:57 +0100 | [diff] [blame] | 2753 | return __sys_sendmmsg(fd, mmsg, vlen, flags, true); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2754 | } |
| 2755 | |
Jens Axboe | 03b1230 | 2019-12-02 18:50:25 -0700 | [diff] [blame] | 2756 | int recvmsg_copy_msghdr(struct msghdr *msg, |
| 2757 | struct user_msghdr __user *umsg, unsigned flags, |
| 2758 | struct sockaddr __user **uaddr, |
| 2759 | struct iovec **iov) |
Jens Axboe | 4257c8c | 2019-11-25 14:27:34 -0700 | [diff] [blame] | 2760 | { |
| 2761 | ssize_t err; |
| 2762 | |
| 2763 | if (MSG_CMSG_COMPAT & flags) { |
| 2764 | struct compat_msghdr __user *msg_compat; |
| 2765 | |
| 2766 | msg_compat = (struct compat_msghdr __user *) umsg; |
| 2767 | err = get_compat_msghdr(msg, msg_compat, uaddr, iov); |
| 2768 | } else { |
| 2769 | err = copy_msghdr_from_user(msg, umsg, uaddr, iov); |
| 2770 | } |
| 2771 | if (err < 0) |
| 2772 | return err; |
| 2773 | |
| 2774 | return 0; |
| 2775 | } |
| 2776 | |
| 2777 | static int ____sys_recvmsg(struct socket *sock, struct msghdr *msg_sys, |
| 2778 | struct user_msghdr __user *msg, |
| 2779 | struct sockaddr __user *uaddr, |
| 2780 | unsigned int flags, int nosec) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2781 | { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2782 | struct compat_msghdr __user *msg_compat = |
Jens Axboe | 4257c8c | 2019-11-25 14:27:34 -0700 | [diff] [blame] | 2783 | (struct compat_msghdr __user *) msg; |
| 2784 | int __user *uaddr_len = COMPAT_NAMELEN(msg); |
| 2785 | struct sockaddr_storage addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2786 | unsigned long cmsg_ptr; |
Al Viro | 2da6290 | 2015-03-14 21:13:46 -0400 | [diff] [blame] | 2787 | int len; |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 2788 | ssize_t err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2789 | |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 2790 | msg_sys->msg_name = &addr; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2791 | cmsg_ptr = (unsigned long)msg_sys->msg_control; |
| 2792 | msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2793 | |
Hannes Frederic Sowa | f3d3342 | 2013-11-21 03:14:22 +0100 | [diff] [blame] | 2794 | /* We assume all kernel code knows the size of sockaddr_storage */ |
| 2795 | msg_sys->msg_namelen = 0; |
| 2796 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2797 | if (sock->file->f_flags & O_NONBLOCK) |
| 2798 | flags |= MSG_DONTWAIT; |
Eric Dumazet | 1af6622 | 2019-12-06 09:38:36 -0800 | [diff] [blame] | 2799 | |
| 2800 | if (unlikely(nosec)) |
| 2801 | err = sock_recvmsg_nosec(sock, msg_sys, flags); |
| 2802 | else |
| 2803 | err = sock_recvmsg(sock, msg_sys, flags); |
| 2804 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2805 | if (err < 0) |
Jens Axboe | 4257c8c | 2019-11-25 14:27:34 -0700 | [diff] [blame] | 2806 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2807 | len = err; |
| 2808 | |
| 2809 | if (uaddr != NULL) { |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 2810 | err = move_addr_to_user(&addr, |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2811 | msg_sys->msg_namelen, uaddr, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2812 | uaddr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2813 | if (err < 0) |
Jens Axboe | 4257c8c | 2019-11-25 14:27:34 -0700 | [diff] [blame] | 2814 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2815 | } |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2816 | err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT), |
David S. Miller | 37f7f42 | 2005-09-16 16:51:01 -0700 | [diff] [blame] | 2817 | COMPAT_FLAGS(msg)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2818 | if (err) |
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 | if (MSG_CMSG_COMPAT & flags) |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2821 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2822 | &msg_compat->msg_controllen); |
| 2823 | else |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2824 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2825 | &msg->msg_controllen); |
| 2826 | if (err) |
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 | err = len; |
Jens Axboe | 4257c8c | 2019-11-25 14:27:34 -0700 | [diff] [blame] | 2829 | out: |
| 2830 | return err; |
| 2831 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2832 | |
Jens Axboe | 4257c8c | 2019-11-25 14:27:34 -0700 | [diff] [blame] | 2833 | static int ___sys_recvmsg(struct socket *sock, struct user_msghdr __user *msg, |
| 2834 | struct msghdr *msg_sys, unsigned int flags, int nosec) |
| 2835 | { |
| 2836 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; |
| 2837 | /* user mode address pointers */ |
| 2838 | struct sockaddr __user *uaddr; |
| 2839 | ssize_t err; |
| 2840 | |
| 2841 | err = recvmsg_copy_msghdr(msg_sys, msg, flags, &uaddr, &iov); |
| 2842 | if (err < 0) |
| 2843 | return err; |
| 2844 | |
| 2845 | err = ____sys_recvmsg(sock, msg_sys, msg, uaddr, flags, nosec); |
Al Viro | da18428 | 2015-03-21 19:29:06 -0400 | [diff] [blame] | 2846 | kfree(iov); |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2847 | return err; |
| 2848 | } |
| 2849 | |
| 2850 | /* |
| 2851 | * BSD recvmsg interface |
| 2852 | */ |
| 2853 | |
Jens Axboe | 03b1230 | 2019-12-02 18:50:25 -0700 | [diff] [blame] | 2854 | long __sys_recvmsg_sock(struct socket *sock, struct msghdr *msg, |
| 2855 | struct user_msghdr __user *umsg, |
| 2856 | struct sockaddr __user *uaddr, unsigned int flags) |
Jens Axboe | aa1fa28 | 2019-04-19 13:38:09 -0600 | [diff] [blame] | 2857 | { |
Jens Axboe | 03b1230 | 2019-12-02 18:50:25 -0700 | [diff] [blame] | 2858 | return ____sys_recvmsg(sock, msg, umsg, uaddr, flags, 0); |
Jens Axboe | aa1fa28 | 2019-04-19 13:38:09 -0600 | [diff] [blame] | 2859 | } |
| 2860 | |
Dominik Brodowski | e1834a3 | 2018-03-13 20:35:57 +0100 | [diff] [blame] | 2861 | long __sys_recvmsg(int fd, struct user_msghdr __user *msg, unsigned int flags, |
| 2862 | bool forbid_cmsg_compat) |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2863 | { |
| 2864 | int fput_needed, err; |
| 2865 | struct msghdr msg_sys; |
Andy Lutomirski | 1be374a | 2013-05-22 14:07:44 -0700 | [diff] [blame] | 2866 | struct socket *sock; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2867 | |
Dominik Brodowski | e1834a3 | 2018-03-13 20:35:57 +0100 | [diff] [blame] | 2868 | if (forbid_cmsg_compat && (flags & MSG_CMSG_COMPAT)) |
| 2869 | return -EINVAL; |
| 2870 | |
Andy Lutomirski | 1be374a | 2013-05-22 14:07:44 -0700 | [diff] [blame] | 2871 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2872 | if (!sock) |
| 2873 | goto out; |
| 2874 | |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2875 | err = ___sys_recvmsg(sock, msg, &msg_sys, flags, 0); |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2876 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2877 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2878 | out: |
| 2879 | return err; |
| 2880 | } |
| 2881 | |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 2882 | SYSCALL_DEFINE3(recvmsg, int, fd, struct user_msghdr __user *, msg, |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2883 | unsigned int, flags) |
| 2884 | { |
Dominik Brodowski | e1834a3 | 2018-03-13 20:35:57 +0100 | [diff] [blame] | 2885 | return __sys_recvmsg(fd, msg, flags, true); |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2886 | } |
| 2887 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2888 | /* |
| 2889 | * Linux recvmmsg interface |
| 2890 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2891 | |
Arnd Bergmann | e11d428 | 2018-04-18 13:43:52 +0200 | [diff] [blame] | 2892 | static int do_recvmmsg(int fd, struct mmsghdr __user *mmsg, |
| 2893 | unsigned int vlen, unsigned int flags, |
| 2894 | struct timespec64 *timeout) |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2895 | { |
| 2896 | int fput_needed, err, datagrams; |
| 2897 | struct socket *sock; |
| 2898 | struct mmsghdr __user *entry; |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2899 | struct compat_mmsghdr __user *compat_entry; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2900 | struct msghdr msg_sys; |
Deepa Dinamani | 766b9f9 | 2016-05-19 17:09:05 -0700 | [diff] [blame] | 2901 | struct timespec64 end_time; |
| 2902 | struct timespec64 timeout64; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2903 | |
| 2904 | if (timeout && |
| 2905 | poll_select_set_timeout(&end_time, timeout->tv_sec, |
| 2906 | timeout->tv_nsec)) |
| 2907 | return -EINVAL; |
| 2908 | |
| 2909 | datagrams = 0; |
| 2910 | |
| 2911 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 2912 | if (!sock) |
| 2913 | return err; |
| 2914 | |
Soheil Hassas Yeganeh | 7797dc4 | 2018-02-27 18:22:40 -0500 | [diff] [blame] | 2915 | if (likely(!(flags & MSG_ERRQUEUE))) { |
| 2916 | err = sock_error(sock->sk); |
| 2917 | if (err) { |
| 2918 | datagrams = err; |
| 2919 | goto out_put; |
| 2920 | } |
Maxime Jayat | e623a9e | 2017-02-21 18:35:51 +0100 | [diff] [blame] | 2921 | } |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2922 | |
| 2923 | entry = mmsg; |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2924 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2925 | |
| 2926 | while (datagrams < vlen) { |
| 2927 | /* |
| 2928 | * No need to ask LSM for more than the first datagram. |
| 2929 | */ |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2930 | if (MSG_CMSG_COMPAT & flags) { |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 2931 | err = ___sys_recvmsg(sock, (struct user_msghdr __user *)compat_entry, |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2932 | &msg_sys, flags & ~MSG_WAITFORONE, |
| 2933 | datagrams); |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2934 | if (err < 0) |
| 2935 | break; |
| 2936 | err = __put_user(err, &compat_entry->msg_len); |
| 2937 | ++compat_entry; |
| 2938 | } else { |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2939 | err = ___sys_recvmsg(sock, |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 2940 | (struct user_msghdr __user *)entry, |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2941 | &msg_sys, flags & ~MSG_WAITFORONE, |
| 2942 | datagrams); |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2943 | if (err < 0) |
| 2944 | break; |
| 2945 | err = put_user(err, &entry->msg_len); |
| 2946 | ++entry; |
| 2947 | } |
| 2948 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2949 | if (err) |
| 2950 | break; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2951 | ++datagrams; |
| 2952 | |
Brandon L Black | 71c5c159 | 2010-03-26 16:18:03 +0000 | [diff] [blame] | 2953 | /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */ |
| 2954 | if (flags & MSG_WAITFORONE) |
| 2955 | flags |= MSG_DONTWAIT; |
| 2956 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2957 | if (timeout) { |
Deepa Dinamani | 766b9f9 | 2016-05-19 17:09:05 -0700 | [diff] [blame] | 2958 | ktime_get_ts64(&timeout64); |
Arnd Bergmann | c2e6c85 | 2018-04-18 13:42:25 +0200 | [diff] [blame] | 2959 | *timeout = timespec64_sub(end_time, timeout64); |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2960 | if (timeout->tv_sec < 0) { |
| 2961 | timeout->tv_sec = timeout->tv_nsec = 0; |
| 2962 | break; |
| 2963 | } |
| 2964 | |
| 2965 | /* Timeout, return less than vlen datagrams */ |
| 2966 | if (timeout->tv_nsec == 0 && timeout->tv_sec == 0) |
| 2967 | break; |
| 2968 | } |
| 2969 | |
| 2970 | /* Out of band data, return right away */ |
| 2971 | if (msg_sys.msg_flags & MSG_OOB) |
| 2972 | break; |
Eric Dumazet | a78cb84 | 2016-01-08 08:37:20 -0800 | [diff] [blame] | 2973 | cond_resched(); |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2974 | } |
| 2975 | |
Arnaldo Carvalho de Melo | 34b88a6 | 2016-03-14 09:56:35 -0300 | [diff] [blame] | 2976 | if (err == 0) |
| 2977 | goto out_put; |
| 2978 | |
| 2979 | if (datagrams == 0) { |
| 2980 | datagrams = err; |
| 2981 | goto out_put; |
| 2982 | } |
| 2983 | |
| 2984 | /* |
| 2985 | * We may return less entries than requested (vlen) if the |
| 2986 | * sock is non block and there aren't enough datagrams... |
| 2987 | */ |
| 2988 | if (err != -EAGAIN) { |
| 2989 | /* |
| 2990 | * ... or if recvmsg returns an error after we |
| 2991 | * received some datagrams, where we record the |
| 2992 | * error to return on the next call or if the |
| 2993 | * app asks about it using getsockopt(SO_ERROR). |
| 2994 | */ |
Eric Dumazet | e05a5f5 | 2023-05-09 16:35:53 +0000 | [diff] [blame] | 2995 | WRITE_ONCE(sock->sk->sk_err, -err); |
Arnaldo Carvalho de Melo | 34b88a6 | 2016-03-14 09:56:35 -0300 | [diff] [blame] | 2996 | } |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2997 | out_put: |
| 2998 | fput_light(sock->file, fput_needed); |
| 2999 | |
Arnaldo Carvalho de Melo | 34b88a6 | 2016-03-14 09:56:35 -0300 | [diff] [blame] | 3000 | return datagrams; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 3001 | } |
| 3002 | |
Arnd Bergmann | e11d428 | 2018-04-18 13:43:52 +0200 | [diff] [blame] | 3003 | int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, |
| 3004 | unsigned int vlen, unsigned int flags, |
| 3005 | struct __kernel_timespec __user *timeout, |
| 3006 | struct old_timespec32 __user *timeout32) |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 3007 | { |
| 3008 | int datagrams; |
Arnd Bergmann | c2e6c85 | 2018-04-18 13:42:25 +0200 | [diff] [blame] | 3009 | struct timespec64 timeout_sys; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 3010 | |
Arnd Bergmann | e11d428 | 2018-04-18 13:43:52 +0200 | [diff] [blame] | 3011 | if (timeout && get_timespec64(&timeout_sys, timeout)) |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 3012 | return -EFAULT; |
| 3013 | |
Arnd Bergmann | e11d428 | 2018-04-18 13:43:52 +0200 | [diff] [blame] | 3014 | if (timeout32 && get_old_timespec32(&timeout_sys, timeout32)) |
| 3015 | return -EFAULT; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 3016 | |
Arnd Bergmann | e11d428 | 2018-04-18 13:43:52 +0200 | [diff] [blame] | 3017 | if (!timeout && !timeout32) |
| 3018 | return do_recvmmsg(fd, mmsg, vlen, flags, NULL); |
| 3019 | |
| 3020 | datagrams = do_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); |
| 3021 | |
| 3022 | if (datagrams <= 0) |
| 3023 | return datagrams; |
| 3024 | |
| 3025 | if (timeout && put_timespec64(&timeout_sys, timeout)) |
| 3026 | datagrams = -EFAULT; |
| 3027 | |
| 3028 | if (timeout32 && put_old_timespec32(&timeout_sys, timeout32)) |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 3029 | datagrams = -EFAULT; |
| 3030 | |
| 3031 | return datagrams; |
| 3032 | } |
| 3033 | |
Dominik Brodowski | 1255e26 | 2018-03-13 20:44:21 +0100 | [diff] [blame] | 3034 | SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg, |
| 3035 | unsigned int, vlen, unsigned int, flags, |
Arnd Bergmann | c2e6c85 | 2018-04-18 13:42:25 +0200 | [diff] [blame] | 3036 | struct __kernel_timespec __user *, timeout) |
Dominik Brodowski | 1255e26 | 2018-03-13 20:44:21 +0100 | [diff] [blame] | 3037 | { |
Arnd Bergmann | e11d428 | 2018-04-18 13:43:52 +0200 | [diff] [blame] | 3038 | if (flags & MSG_CMSG_COMPAT) |
| 3039 | return -EINVAL; |
| 3040 | |
| 3041 | return __sys_recvmmsg(fd, mmsg, vlen, flags, timeout, NULL); |
Dominik Brodowski | 1255e26 | 2018-03-13 20:44:21 +0100 | [diff] [blame] | 3042 | } |
| 3043 | |
Arnd Bergmann | e11d428 | 2018-04-18 13:43:52 +0200 | [diff] [blame] | 3044 | #ifdef CONFIG_COMPAT_32BIT_TIME |
| 3045 | SYSCALL_DEFINE5(recvmmsg_time32, int, fd, struct mmsghdr __user *, mmsg, |
| 3046 | unsigned int, vlen, unsigned int, flags, |
| 3047 | struct old_timespec32 __user *, timeout) |
| 3048 | { |
| 3049 | if (flags & MSG_CMSG_COMPAT) |
| 3050 | return -EINVAL; |
| 3051 | |
| 3052 | return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL, timeout); |
| 3053 | } |
| 3054 | #endif |
| 3055 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 3056 | #ifdef __ARCH_WANT_SYS_SOCKETCALL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3057 | /* Argument list sizes for sys_socketcall */ |
| 3058 | #define AL(x) ((x) * sizeof(unsigned long)) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 3059 | static const unsigned char nargs[21] = { |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3060 | AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), |
| 3061 | AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), |
| 3062 | AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 3063 | AL(4), AL(5), AL(4) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3064 | }; |
| 3065 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3066 | #undef AL |
| 3067 | |
| 3068 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3069 | * System call vectors. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3070 | * |
| 3071 | * Argument checking cleaned up. Saved 20% in size. |
| 3072 | * This function doesn't need to set the kernel lock because |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3073 | * it is set by the callees. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3074 | */ |
| 3075 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 3076 | SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3077 | { |
Chen Gang | 2950fa9 | 2013-04-07 16:55:23 +0800 | [diff] [blame] | 3078 | unsigned long a[AUDITSC_ARGS]; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3079 | unsigned long a0, a1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3080 | int err; |
Arjan van de Ven | 4737905 | 2009-09-28 12:57:44 -0700 | [diff] [blame] | 3081 | unsigned int len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3082 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 3083 | if (call < 1 || call > SYS_SENDMMSG) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3084 | return -EINVAL; |
Jeremy Cline | c8e8cd5 | 2018-07-27 22:43:01 +0000 | [diff] [blame] | 3085 | call = array_index_nospec(call, SYS_SENDMMSG + 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3086 | |
Arjan van de Ven | 4737905 | 2009-09-28 12:57:44 -0700 | [diff] [blame] | 3087 | len = nargs[call]; |
| 3088 | if (len > sizeof(a)) |
| 3089 | return -EINVAL; |
| 3090 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3091 | /* copy_from_user should be SMP safe. */ |
Arjan van de Ven | 4737905 | 2009-09-28 12:57:44 -0700 | [diff] [blame] | 3092 | if (copy_from_user(a, args, len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3093 | return -EFAULT; |
David Woodhouse | 3ec3b2f | 2005-05-17 12:08:48 +0100 | [diff] [blame] | 3094 | |
Chen Gang | 2950fa9 | 2013-04-07 16:55:23 +0800 | [diff] [blame] | 3095 | err = audit_socketcall(nargs[call] / sizeof(unsigned long), a); |
| 3096 | if (err) |
| 3097 | return err; |
David Woodhouse | 3ec3b2f | 2005-05-17 12:08:48 +0100 | [diff] [blame] | 3098 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3099 | a0 = a[0]; |
| 3100 | a1 = a[1]; |
| 3101 | |
| 3102 | switch (call) { |
| 3103 | case SYS_SOCKET: |
Dominik Brodowski | 9d6a15c | 2018-03-13 19:29:43 +0100 | [diff] [blame] | 3104 | err = __sys_socket(a0, a1, a[2]); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3105 | break; |
| 3106 | case SYS_BIND: |
Dominik Brodowski | a87d35d | 2018-03-13 19:33:09 +0100 | [diff] [blame] | 3107 | err = __sys_bind(a0, (struct sockaddr __user *)a1, a[2]); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3108 | break; |
| 3109 | case SYS_CONNECT: |
Dominik Brodowski | 1387c2c | 2018-03-13 19:35:09 +0100 | [diff] [blame] | 3110 | err = __sys_connect(a0, (struct sockaddr __user *)a1, a[2]); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3111 | break; |
| 3112 | case SYS_LISTEN: |
Dominik Brodowski | 25e290e | 2018-03-13 19:36:54 +0100 | [diff] [blame] | 3113 | err = __sys_listen(a0, a1); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3114 | break; |
| 3115 | case SYS_ACCEPT: |
Dominik Brodowski | 4541e80 | 2018-03-13 19:24:23 +0100 | [diff] [blame] | 3116 | err = __sys_accept4(a0, (struct sockaddr __user *)a1, |
| 3117 | (int __user *)a[2], 0); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3118 | break; |
| 3119 | case SYS_GETSOCKNAME: |
| 3120 | err = |
Dominik Brodowski | 8882a10 | 2018-03-13 19:43:14 +0100 | [diff] [blame] | 3121 | __sys_getsockname(a0, (struct sockaddr __user *)a1, |
| 3122 | (int __user *)a[2]); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3123 | break; |
| 3124 | case SYS_GETPEERNAME: |
| 3125 | err = |
Dominik Brodowski | b21c8f8 | 2018-03-13 19:47:00 +0100 | [diff] [blame] | 3126 | __sys_getpeername(a0, (struct sockaddr __user *)a1, |
| 3127 | (int __user *)a[2]); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3128 | break; |
| 3129 | case SYS_SOCKETPAIR: |
Dominik Brodowski | 6debc8d | 2018-03-13 19:49:23 +0100 | [diff] [blame] | 3130 | err = __sys_socketpair(a0, a1, a[2], (int __user *)a[3]); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3131 | break; |
| 3132 | case SYS_SEND: |
Dominik Brodowski | f3bf896 | 2018-03-13 19:52:00 +0100 | [diff] [blame] | 3133 | err = __sys_sendto(a0, (void __user *)a1, a[2], a[3], |
| 3134 | NULL, 0); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3135 | break; |
| 3136 | case SYS_SENDTO: |
Dominik Brodowski | 211b634 | 2018-03-13 19:18:52 +0100 | [diff] [blame] | 3137 | err = __sys_sendto(a0, (void __user *)a1, a[2], a[3], |
| 3138 | (struct sockaddr __user *)a[4], a[5]); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3139 | break; |
| 3140 | case SYS_RECV: |
Dominik Brodowski | d27e9af | 2018-03-13 19:54:17 +0100 | [diff] [blame] | 3141 | err = __sys_recvfrom(a0, (void __user *)a1, a[2], a[3], |
| 3142 | NULL, NULL); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3143 | break; |
| 3144 | case SYS_RECVFROM: |
Dominik Brodowski | 7a09e1e | 2018-03-13 19:10:06 +0100 | [diff] [blame] | 3145 | err = __sys_recvfrom(a0, (void __user *)a1, a[2], a[3], |
| 3146 | (struct sockaddr __user *)a[4], |
| 3147 | (int __user *)a[5]); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3148 | break; |
| 3149 | case SYS_SHUTDOWN: |
Dominik Brodowski | 005a1ae | 2018-03-13 20:07:05 +0100 | [diff] [blame] | 3150 | err = __sys_shutdown(a0, a1); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3151 | break; |
| 3152 | case SYS_SETSOCKOPT: |
Dominik Brodowski | cc36dca | 2018-03-13 20:10:59 +0100 | [diff] [blame] | 3153 | err = __sys_setsockopt(a0, a1, a[2], (char __user *)a[3], |
| 3154 | a[4]); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3155 | break; |
| 3156 | case SYS_GETSOCKOPT: |
| 3157 | err = |
Dominik Brodowski | 13a2d70 | 2018-03-13 20:15:04 +0100 | [diff] [blame] | 3158 | __sys_getsockopt(a0, a1, a[2], (char __user *)a[3], |
| 3159 | (int __user *)a[4]); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3160 | break; |
| 3161 | case SYS_SENDMSG: |
Dominik Brodowski | e1834a3 | 2018-03-13 20:35:57 +0100 | [diff] [blame] | 3162 | err = __sys_sendmsg(a0, (struct user_msghdr __user *)a1, |
| 3163 | a[2], true); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3164 | break; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 3165 | case SYS_SENDMMSG: |
Dominik Brodowski | e1834a3 | 2018-03-13 20:35:57 +0100 | [diff] [blame] | 3166 | err = __sys_sendmmsg(a0, (struct mmsghdr __user *)a1, a[2], |
| 3167 | a[3], true); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 3168 | break; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3169 | case SYS_RECVMSG: |
Dominik Brodowski | e1834a3 | 2018-03-13 20:35:57 +0100 | [diff] [blame] | 3170 | err = __sys_recvmsg(a0, (struct user_msghdr __user *)a1, |
| 3171 | a[2], true); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3172 | break; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 3173 | case SYS_RECVMMSG: |
Arnd Bergmann | 3ca47e9 | 2019-04-23 17:43:50 +0200 | [diff] [blame] | 3174 | if (IS_ENABLED(CONFIG_64BIT)) |
Arnd Bergmann | e11d428 | 2018-04-18 13:43:52 +0200 | [diff] [blame] | 3175 | err = __sys_recvmmsg(a0, (struct mmsghdr __user *)a1, |
| 3176 | a[2], a[3], |
| 3177 | (struct __kernel_timespec __user *)a[4], |
| 3178 | NULL); |
| 3179 | else |
| 3180 | err = __sys_recvmmsg(a0, (struct mmsghdr __user *)a1, |
| 3181 | a[2], a[3], NULL, |
| 3182 | (struct old_timespec32 __user *)a[4]); |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 3183 | break; |
Ulrich Drepper | de11def | 2008-11-19 15:36:14 -0800 | [diff] [blame] | 3184 | case SYS_ACCEPT4: |
Dominik Brodowski | 4541e80 | 2018-03-13 19:24:23 +0100 | [diff] [blame] | 3185 | err = __sys_accept4(a0, (struct sockaddr __user *)a1, |
| 3186 | (int __user *)a[2], a[3]); |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 3187 | break; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3188 | default: |
| 3189 | err = -EINVAL; |
| 3190 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3191 | } |
| 3192 | return err; |
| 3193 | } |
| 3194 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3195 | #endif /* __ARCH_WANT_SYS_SOCKETCALL */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3196 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 3197 | /** |
| 3198 | * sock_register - add a socket protocol handler |
| 3199 | * @ops: description of protocol |
| 3200 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3201 | * This function is called by a protocol handler that wants to |
| 3202 | * advertise its address family, and have it linked into the |
Masanari Iida | e793c0f | 2014-09-04 23:44:36 +0900 | [diff] [blame] | 3203 | * socket interface. The value ops->family corresponds to the |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 3204 | * socket system call protocol family. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3205 | */ |
Stephen Hemminger | f0fd27d | 2006-08-09 21:03:17 -0700 | [diff] [blame] | 3206 | int sock_register(const struct net_proto_family *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3207 | { |
| 3208 | int err; |
| 3209 | |
| 3210 | if (ops->family >= NPROTO) { |
Yang Yingliang | 3410f22 | 2014-02-12 17:09:55 +0800 | [diff] [blame] | 3211 | pr_crit("protocol %d >= NPROTO(%d)\n", ops->family, NPROTO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3212 | return -ENOBUFS; |
| 3213 | } |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 3214 | |
| 3215 | spin_lock(&net_family_lock); |
Eric Dumazet | 190683a | 2010-11-10 10:50:44 +0000 | [diff] [blame] | 3216 | if (rcu_dereference_protected(net_families[ops->family], |
| 3217 | lockdep_is_held(&net_family_lock))) |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 3218 | err = -EEXIST; |
| 3219 | else { |
Eric Dumazet | cf778b0 | 2012-01-12 04:41:32 +0000 | [diff] [blame] | 3220 | rcu_assign_pointer(net_families[ops->family], ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3221 | err = 0; |
| 3222 | } |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 3223 | spin_unlock(&net_family_lock); |
| 3224 | |
Yejune Deng | fe0bdbd | 2021-06-21 13:12:25 +0800 | [diff] [blame] | 3225 | 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] | 3226 | return err; |
| 3227 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3228 | EXPORT_SYMBOL(sock_register); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3229 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 3230 | /** |
| 3231 | * sock_unregister - remove a protocol handler |
| 3232 | * @family: protocol family to remove |
| 3233 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3234 | * This function is called by a protocol handler that wants to |
| 3235 | * remove its address family, and have it unlinked from the |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 3236 | * new socket creation. |
| 3237 | * |
| 3238 | * If protocol handler is a module, then it can use module reference |
| 3239 | * counts to protect against new references. If protocol handler is not |
| 3240 | * a module then it needs to provide its own protection in |
| 3241 | * the ops->create routine. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3242 | */ |
Stephen Hemminger | f0fd27d | 2006-08-09 21:03:17 -0700 | [diff] [blame] | 3243 | void sock_unregister(int family) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3244 | { |
Stephen Hemminger | f0fd27d | 2006-08-09 21:03:17 -0700 | [diff] [blame] | 3245 | BUG_ON(family < 0 || family >= NPROTO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3246 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 3247 | spin_lock(&net_family_lock); |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 3248 | RCU_INIT_POINTER(net_families[family], NULL); |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 3249 | spin_unlock(&net_family_lock); |
| 3250 | |
| 3251 | synchronize_rcu(); |
| 3252 | |
Yejune Deng | fe0bdbd | 2021-06-21 13:12:25 +0800 | [diff] [blame] | 3253 | pr_info("NET: Unregistered %s protocol family\n", pf_family_names[family]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3254 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3255 | EXPORT_SYMBOL(sock_unregister); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3256 | |
Xin Long | bf2ae2e | 2018-03-10 18:57:50 +0800 | [diff] [blame] | 3257 | bool sock_is_registered(int family) |
| 3258 | { |
Jeremy Cline | 66b51b0 | 2018-08-13 22:23:13 +0000 | [diff] [blame] | 3259 | return family < NPROTO && rcu_access_pointer(net_families[family]); |
Xin Long | bf2ae2e | 2018-03-10 18:57:50 +0800 | [diff] [blame] | 3260 | } |
| 3261 | |
Andi Kleen | 77d76ea | 2005-12-22 12:43:42 -0800 | [diff] [blame] | 3262 | static int __init sock_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3263 | { |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 3264 | int err; |
Eric W. Biederman | 2ca794e | 2012-04-19 13:20:32 +0000 | [diff] [blame] | 3265 | /* |
| 3266 | * Initialize the network sysctl infrastructure. |
| 3267 | */ |
| 3268 | err = net_sysctl_init(); |
| 3269 | if (err) |
| 3270 | goto out; |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 3271 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3272 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3273 | * Initialize skbuff SLAB cache |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3274 | */ |
| 3275 | skb_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3276 | |
| 3277 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3278 | * Initialize the protocols module. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3279 | */ |
| 3280 | |
| 3281 | init_inodecache(); |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 3282 | |
| 3283 | err = register_filesystem(&sock_fs_type); |
| 3284 | if (err) |
Miaohe Lin | 47260ba | 2020-08-06 19:54:19 +0800 | [diff] [blame] | 3285 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3286 | sock_mnt = kern_mount(&sock_fs_type); |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 3287 | if (IS_ERR(sock_mnt)) { |
| 3288 | err = PTR_ERR(sock_mnt); |
| 3289 | goto out_mount; |
| 3290 | } |
Andi Kleen | 77d76ea | 2005-12-22 12:43:42 -0800 | [diff] [blame] | 3291 | |
| 3292 | /* The real protocol initialization is performed in later initcalls. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3293 | */ |
| 3294 | |
| 3295 | #ifdef CONFIG_NETFILTER |
Pablo Neira Ayuso | 6d11cfd | 2013-05-22 22:42:36 +0000 | [diff] [blame] | 3296 | err = netfilter_init(); |
| 3297 | if (err) |
| 3298 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3299 | #endif |
David S. Miller | cbeb321 | 2005-12-22 12:58:55 -0800 | [diff] [blame] | 3300 | |
Daniel Borkmann | 408eccc | 2014-04-01 16:20:23 +0200 | [diff] [blame] | 3301 | ptp_classifier_init(); |
Richard Cochran | c1f19b5 | 2010-07-17 08:49:36 +0000 | [diff] [blame] | 3302 | |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 3303 | out: |
| 3304 | return err; |
| 3305 | |
| 3306 | out_mount: |
| 3307 | unregister_filesystem(&sock_fs_type); |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 3308 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3309 | } |
| 3310 | |
Andi Kleen | 77d76ea | 2005-12-22 12:43:42 -0800 | [diff] [blame] | 3311 | core_initcall(sock_init); /* early initcall */ |
| 3312 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3313 | #ifdef CONFIG_PROC_FS |
| 3314 | void socket_seq_show(struct seq_file *seq) |
| 3315 | { |
Tonghao Zhang | 648845a | 2017-12-14 05:51:58 -0800 | [diff] [blame] | 3316 | seq_printf(seq, "sockets: used %d\n", |
| 3317 | sock_inuse_get(seq->private)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3318 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3319 | #endif /* CONFIG_PROC_FS */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3320 | |
Arnd Bergmann | 29c4964 | 2021-07-22 16:29:03 +0200 | [diff] [blame] | 3321 | /* Handle the fact that while struct ifreq has the same *layout* on |
| 3322 | * 32/64 for everything but ifreq::ifru_ifmap and ifreq::ifru_data, |
| 3323 | * which are handled elsewhere, it still has different *size* due to |
| 3324 | * ifreq::ifru_ifmap (which is 16 bytes on 32 bit, 24 bytes on 64-bit, |
| 3325 | * resulting in struct ifreq being 32 and 40 bytes respectively). |
| 3326 | * As a result, if the struct happens to be at the end of a page and |
| 3327 | * the next page isn't readable/writable, we get a fault. To prevent |
| 3328 | * that, copy back and forth to the full size. |
| 3329 | */ |
| 3330 | int get_user_ifreq(struct ifreq *ifr, void __user **ifrdata, void __user *arg) |
| 3331 | { |
| 3332 | if (in_compat_syscall()) { |
| 3333 | struct compat_ifreq *ifr32 = (struct compat_ifreq *)ifr; |
| 3334 | |
| 3335 | memset(ifr, 0, sizeof(*ifr)); |
| 3336 | if (copy_from_user(ifr32, arg, sizeof(*ifr32))) |
| 3337 | return -EFAULT; |
| 3338 | |
| 3339 | if (ifrdata) |
| 3340 | *ifrdata = compat_ptr(ifr32->ifr_data); |
| 3341 | |
| 3342 | return 0; |
| 3343 | } |
| 3344 | |
| 3345 | if (copy_from_user(ifr, arg, sizeof(*ifr))) |
| 3346 | return -EFAULT; |
| 3347 | |
| 3348 | if (ifrdata) |
| 3349 | *ifrdata = ifr->ifr_data; |
| 3350 | |
| 3351 | return 0; |
| 3352 | } |
| 3353 | EXPORT_SYMBOL(get_user_ifreq); |
| 3354 | |
| 3355 | int put_user_ifreq(struct ifreq *ifr, void __user *arg) |
| 3356 | { |
| 3357 | size_t size = sizeof(*ifr); |
| 3358 | |
| 3359 | if (in_compat_syscall()) |
| 3360 | size = sizeof(struct compat_ifreq); |
| 3361 | |
| 3362 | if (copy_to_user(arg, ifr, size)) |
| 3363 | return -EFAULT; |
| 3364 | |
| 3365 | return 0; |
| 3366 | } |
| 3367 | EXPORT_SYMBOL(put_user_ifreq); |
| 3368 | |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 3369 | #ifdef CONFIG_COMPAT |
Arnd Bergmann | 7a50a24 | 2009-11-08 20:57:03 -0800 | [diff] [blame] | 3370 | static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32) |
| 3371 | { |
Arnd Bergmann | 7a50a24 | 2009-11-08 20:57:03 -0800 | [diff] [blame] | 3372 | compat_uptr_t uptr32; |
Al Viro | 44c02a2 | 2017-10-05 12:59:44 -0400 | [diff] [blame] | 3373 | struct ifreq ifr; |
| 3374 | void __user *saved; |
| 3375 | int err; |
Arnd Bergmann | 7a50a24 | 2009-11-08 20:57:03 -0800 | [diff] [blame] | 3376 | |
Arnd Bergmann | 29c4964 | 2021-07-22 16:29:03 +0200 | [diff] [blame] | 3377 | if (get_user_ifreq(&ifr, NULL, uifr32)) |
Arnd Bergmann | 7a50a24 | 2009-11-08 20:57:03 -0800 | [diff] [blame] | 3378 | return -EFAULT; |
| 3379 | |
| 3380 | if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu)) |
| 3381 | return -EFAULT; |
| 3382 | |
Al Viro | 44c02a2 | 2017-10-05 12:59:44 -0400 | [diff] [blame] | 3383 | saved = ifr.ifr_settings.ifs_ifsu.raw_hdlc; |
| 3384 | ifr.ifr_settings.ifs_ifsu.raw_hdlc = compat_ptr(uptr32); |
Arnd Bergmann | 7a50a24 | 2009-11-08 20:57:03 -0800 | [diff] [blame] | 3385 | |
Arnd Bergmann | a554bf9 | 2021-07-27 15:45:12 +0200 | [diff] [blame] | 3386 | err = dev_ioctl(net, SIOCWANDEV, &ifr, NULL, NULL); |
Al Viro | 44c02a2 | 2017-10-05 12:59:44 -0400 | [diff] [blame] | 3387 | if (!err) { |
| 3388 | ifr.ifr_settings.ifs_ifsu.raw_hdlc = saved; |
Arnd Bergmann | 29c4964 | 2021-07-22 16:29:03 +0200 | [diff] [blame] | 3389 | if (put_user_ifreq(&ifr, uifr32)) |
Al Viro | 44c02a2 | 2017-10-05 12:59:44 -0400 | [diff] [blame] | 3390 | err = -EFAULT; |
Joe Perches | ccbd6a5 | 2010-05-14 10:58:26 +0000 | [diff] [blame] | 3391 | } |
Al Viro | 44c02a2 | 2017-10-05 12:59:44 -0400 | [diff] [blame] | 3392 | return err; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3393 | } |
| 3394 | |
Ben Hutchings | 590d469 | 2013-11-18 17:04:13 +0000 | [diff] [blame] | 3395 | /* Handle ioctls that use ifreq::ifr_data and just need struct ifreq converted */ |
| 3396 | static int compat_ifr_data_ioctl(struct net *net, unsigned int cmd, |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3397 | struct compat_ifreq __user *u_ifreq32) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3398 | { |
Al Viro | 44c02a2 | 2017-10-05 12:59:44 -0400 | [diff] [blame] | 3399 | struct ifreq ifreq; |
Arnd Bergmann | a554bf9 | 2021-07-27 15:45:12 +0200 | [diff] [blame] | 3400 | void __user *data; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3401 | |
Peter Collingbourne | d0efb16 | 2021-08-26 12:46:01 -0700 | [diff] [blame] | 3402 | if (!is_socket_ioctl_cmd(cmd)) |
| 3403 | return -ENOTTY; |
Arnd Bergmann | a554bf9 | 2021-07-27 15:45:12 +0200 | [diff] [blame] | 3404 | if (get_user_ifreq(&ifreq, &data, u_ifreq32)) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3405 | return -EFAULT; |
Arnd Bergmann | a554bf9 | 2021-07-27 15:45:12 +0200 | [diff] [blame] | 3406 | ifreq.ifr_data = data; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3407 | |
Arnd Bergmann | a554bf9 | 2021-07-27 15:45:12 +0200 | [diff] [blame] | 3408 | return dev_ioctl(net, cmd, &ifreq, data, NULL); |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 3409 | } |
| 3410 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3411 | static int compat_sock_ioctl_trans(struct file *file, struct socket *sock, |
| 3412 | unsigned int cmd, unsigned long arg) |
| 3413 | { |
| 3414 | void __user *argp = compat_ptr(arg); |
| 3415 | struct sock *sk = sock->sk; |
| 3416 | struct net *net = sock_net(sk); |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 3417 | const struct proto_ops *ops; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3418 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3419 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) |
Arnd Bergmann | 88fc023 | 2021-07-27 15:45:15 +0200 | [diff] [blame] | 3420 | return sock_ioctl(file, cmd, (unsigned long)argp); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3421 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3422 | switch (cmd) { |
Arnd Bergmann | 7a50a24 | 2009-11-08 20:57:03 -0800 | [diff] [blame] | 3423 | case SIOCWANDEV: |
| 3424 | return compat_siocwandev(net, argp); |
Arnd Bergmann | 0768e17 | 2019-04-17 22:56:11 +0200 | [diff] [blame] | 3425 | case SIOCGSTAMP_OLD: |
| 3426 | case SIOCGSTAMPNS_OLD: |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 3427 | ops = READ_ONCE(sock->ops); |
| 3428 | if (!ops->gettstamp) |
Arnd Bergmann | c7cbdbf | 2019-04-17 22:51:48 +0200 | [diff] [blame] | 3429 | return -ENOIOCTLCMD; |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 3430 | return ops->gettstamp(sock, argp, cmd == SIOCGSTAMP_OLD, |
| 3431 | !COMPAT_USE_64BIT_TIME); |
Arnd Bergmann | c7cbdbf | 2019-04-17 22:51:48 +0200 | [diff] [blame] | 3432 | |
Arnd Bergmann | dd98d28 | 2021-07-22 16:28:59 +0200 | [diff] [blame] | 3433 | case SIOCETHTOOL: |
Ben Hutchings | 590d469 | 2013-11-18 17:04:13 +0000 | [diff] [blame] | 3434 | case SIOCBONDSLAVEINFOQUERY: |
| 3435 | case SIOCBONDINFOQUERY: |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 3436 | case SIOCSHWTSTAMP: |
Ben Hutchings | fd468c7 | 2013-11-14 01:19:29 +0000 | [diff] [blame] | 3437 | case SIOCGHWTSTAMP: |
Ben Hutchings | 590d469 | 2013-11-18 17:04:13 +0000 | [diff] [blame] | 3438 | return compat_ifr_data_ioctl(net, cmd, argp); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3439 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3440 | case FIOSETOWN: |
| 3441 | case SIOCSPGRP: |
| 3442 | case FIOGETOWN: |
| 3443 | case SIOCGPGRP: |
| 3444 | case SIOCBRADDBR: |
| 3445 | case SIOCBRDELBR: |
| 3446 | case SIOCGIFVLAN: |
| 3447 | case SIOCSIFVLAN: |
Andrey Vagin | c62cce2 | 2016-10-24 18:29:13 -0700 | [diff] [blame] | 3448 | case SIOCGSKNS: |
Arnd Bergmann | 0768e17 | 2019-04-17 22:56:11 +0200 | [diff] [blame] | 3449 | case SIOCGSTAMP_NEW: |
| 3450 | case SIOCGSTAMPNS_NEW: |
Arnd Bergmann | 876f0bf | 2021-07-22 16:29:02 +0200 | [diff] [blame] | 3451 | case SIOCGIFCONF: |
Remi Pommarel | fd3a459 | 2021-12-24 12:46:40 +0100 | [diff] [blame] | 3452 | case SIOCSIFBR: |
| 3453 | case SIOCGIFBR: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3454 | return sock_ioctl(file, cmd, arg); |
| 3455 | |
| 3456 | case SIOCGIFFLAGS: |
| 3457 | case SIOCSIFFLAGS: |
Arnd Bergmann | 709566d | 2021-07-22 16:29:00 +0200 | [diff] [blame] | 3458 | case SIOCGIFMAP: |
| 3459 | case SIOCSIFMAP: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3460 | case SIOCGIFMETRIC: |
| 3461 | case SIOCSIFMETRIC: |
| 3462 | case SIOCGIFMTU: |
| 3463 | case SIOCSIFMTU: |
| 3464 | case SIOCGIFMEM: |
| 3465 | case SIOCSIFMEM: |
| 3466 | case SIOCGIFHWADDR: |
| 3467 | case SIOCSIFHWADDR: |
| 3468 | case SIOCADDMULTI: |
| 3469 | case SIOCDELMULTI: |
| 3470 | case SIOCGIFINDEX: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3471 | case SIOCGIFADDR: |
| 3472 | case SIOCSIFADDR: |
| 3473 | case SIOCSIFHWBROADCAST: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3474 | case SIOCDIFADDR: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3475 | case SIOCGIFBRDADDR: |
| 3476 | case SIOCSIFBRDADDR: |
| 3477 | case SIOCGIFDSTADDR: |
| 3478 | case SIOCSIFDSTADDR: |
| 3479 | case SIOCGIFNETMASK: |
| 3480 | case SIOCSIFNETMASK: |
| 3481 | case SIOCSIFPFLAGS: |
| 3482 | case SIOCGIFPFLAGS: |
| 3483 | case SIOCGIFTXQLEN: |
| 3484 | case SIOCSIFTXQLEN: |
| 3485 | case SIOCBRADDIF: |
| 3486 | case SIOCBRDELIF: |
Johannes Berg | c6c9fee | 2019-01-25 22:43:19 +0100 | [diff] [blame] | 3487 | case SIOCGIFNAME: |
Arnd Bergmann | 9177efd | 2009-11-06 08:09:09 +0000 | [diff] [blame] | 3488 | case SIOCSIFNAME: |
| 3489 | case SIOCGMIIPHY: |
| 3490 | case SIOCGMIIREG: |
| 3491 | case SIOCSMIIREG: |
Al Viro | f92d4fc | 2017-09-30 19:32:17 -0400 | [diff] [blame] | 3492 | case SIOCBONDENSLAVE: |
| 3493 | case SIOCBONDRELEASE: |
| 3494 | case SIOCBONDSETHWADDR: |
| 3495 | case SIOCBONDCHANGEACTIVE: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3496 | case SIOCSARP: |
| 3497 | case SIOCGARP: |
| 3498 | case SIOCDARP: |
Arnd Bergmann | c7dc504 | 2019-06-03 23:07:12 +0200 | [diff] [blame] | 3499 | case SIOCOUTQ: |
Arnd Bergmann | 9d7bf41 | 2019-06-03 23:06:00 +0200 | [diff] [blame] | 3500 | case SIOCOUTQNSD: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3501 | case SIOCATMARK: |
Johannes Berg | 63ff03a | 2019-01-25 22:43:17 +0100 | [diff] [blame] | 3502 | return sock_do_ioctl(net, sock, cmd, arg); |
Arnd Bergmann | 9177efd | 2009-11-06 08:09:09 +0000 | [diff] [blame] | 3503 | } |
| 3504 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3505 | return -ENOIOCTLCMD; |
| 3506 | } |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3507 | |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 3508 | static long compat_sock_ioctl(struct file *file, unsigned int cmd, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3509 | unsigned long arg) |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 3510 | { |
| 3511 | struct socket *sock = file->private_data; |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 3512 | const struct proto_ops *ops = READ_ONCE(sock->ops); |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 3513 | int ret = -ENOIOCTLCMD; |
David S. Miller | 87de87d | 2008-06-03 09:14:03 -0700 | [diff] [blame] | 3514 | struct sock *sk; |
| 3515 | struct net *net; |
| 3516 | |
| 3517 | sk = sock->sk; |
| 3518 | net = sock_net(sk); |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 3519 | |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 3520 | if (ops->compat_ioctl) |
| 3521 | ret = ops->compat_ioctl(sock, cmd, arg); |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 3522 | |
David S. Miller | 87de87d | 2008-06-03 09:14:03 -0700 | [diff] [blame] | 3523 | if (ret == -ENOIOCTLCMD && |
| 3524 | (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)) |
| 3525 | ret = compat_wext_handle_ioctl(net, cmd, arg); |
| 3526 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3527 | if (ret == -ENOIOCTLCMD) |
| 3528 | ret = compat_sock_ioctl_trans(file, sock, cmd, arg); |
| 3529 | |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 3530 | return ret; |
| 3531 | } |
| 3532 | #endif |
| 3533 | |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 3534 | /** |
| 3535 | * kernel_bind - bind an address to a socket (kernel space) |
| 3536 | * @sock: socket |
| 3537 | * @addr: address |
| 3538 | * @addrlen: length of address |
| 3539 | * |
| 3540 | * Returns 0 or an error. |
| 3541 | */ |
| 3542 | |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3543 | int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen) |
| 3544 | { |
Jordan Rife | c889a99a | 2023-09-21 18:46:42 -0500 | [diff] [blame] | 3545 | struct sockaddr_storage address; |
| 3546 | |
| 3547 | memcpy(&address, addr, addrlen); |
| 3548 | |
| 3549 | return READ_ONCE(sock->ops)->bind(sock, (struct sockaddr *)&address, |
| 3550 | addrlen); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3551 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3552 | EXPORT_SYMBOL(kernel_bind); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3553 | |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 3554 | /** |
| 3555 | * kernel_listen - move socket to listening state (kernel space) |
| 3556 | * @sock: socket |
| 3557 | * @backlog: pending connections queue size |
| 3558 | * |
| 3559 | * Returns 0 or an error. |
| 3560 | */ |
| 3561 | |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3562 | int kernel_listen(struct socket *sock, int backlog) |
| 3563 | { |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 3564 | return READ_ONCE(sock->ops)->listen(sock, backlog); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3565 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3566 | EXPORT_SYMBOL(kernel_listen); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3567 | |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 3568 | /** |
| 3569 | * kernel_accept - accept a connection (kernel space) |
| 3570 | * @sock: listening socket |
| 3571 | * @newsock: new connected socket |
| 3572 | * @flags: flags |
| 3573 | * |
| 3574 | * @flags must be SOCK_CLOEXEC, SOCK_NONBLOCK or 0. |
| 3575 | * If it fails, @newsock is guaranteed to be %NULL. |
| 3576 | * Returns 0 or an error. |
| 3577 | */ |
| 3578 | |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3579 | int kernel_accept(struct socket *sock, struct socket **newsock, int flags) |
| 3580 | { |
| 3581 | struct sock *sk = sock->sk; |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 3582 | const struct proto_ops *ops = READ_ONCE(sock->ops); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3583 | int err; |
| 3584 | |
| 3585 | err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol, |
| 3586 | newsock); |
| 3587 | if (err < 0) |
| 3588 | goto done; |
| 3589 | |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 3590 | err = ops->accept(sock, *newsock, flags, true); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3591 | if (err < 0) { |
| 3592 | sock_release(*newsock); |
Tony Battersby | fa8705b | 2007-10-10 21:09:04 -0700 | [diff] [blame] | 3593 | *newsock = NULL; |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3594 | goto done; |
| 3595 | } |
| 3596 | |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 3597 | (*newsock)->ops = ops; |
| 3598 | __module_get(ops->owner); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3599 | |
| 3600 | done: |
| 3601 | return err; |
| 3602 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3603 | EXPORT_SYMBOL(kernel_accept); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3604 | |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 3605 | /** |
| 3606 | * kernel_connect - connect a socket (kernel space) |
| 3607 | * @sock: socket |
| 3608 | * @addr: address |
| 3609 | * @addrlen: address length |
| 3610 | * @flags: flags (O_NONBLOCK, ...) |
| 3611 | * |
Lu Wei | f1dcffc | 2021-03-25 11:01:55 +0800 | [diff] [blame] | 3612 | * For datagram sockets, @addr is the address to which datagrams are sent |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 3613 | * by default, and the only address from which datagrams are received. |
| 3614 | * For stream sockets, attempts to connect to @addr. |
| 3615 | * Returns 0 or an error code. |
| 3616 | */ |
| 3617 | |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3618 | int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, |
YOSHIFUJI Hideaki | 4768fbc | 2007-02-09 23:25:31 +0900 | [diff] [blame] | 3619 | int flags) |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3620 | { |
Jordan Rife | 0bdf399 | 2023-08-21 16:45:23 -0500 | [diff] [blame] | 3621 | struct sockaddr_storage address; |
| 3622 | |
| 3623 | memcpy(&address, addr, addrlen); |
| 3624 | |
| 3625 | return READ_ONCE(sock->ops)->connect(sock, (struct sockaddr *)&address, |
| 3626 | addrlen, flags); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3627 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3628 | EXPORT_SYMBOL(kernel_connect); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3629 | |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 3630 | /** |
| 3631 | * kernel_getsockname - get the address which the socket is bound (kernel space) |
| 3632 | * @sock: socket |
| 3633 | * @addr: address holder |
| 3634 | * |
| 3635 | * Fills the @addr pointer with the address which the socket is bound. |
Alex Maydanik | 0fc95de | 2022-02-12 12:29:27 +0200 | [diff] [blame] | 3636 | * Returns the length of the address in bytes or an error code. |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 3637 | */ |
| 3638 | |
Denys Vlasenko | 9b2c45d | 2018-02-12 20:00:20 +0100 | [diff] [blame] | 3639 | int kernel_getsockname(struct socket *sock, struct sockaddr *addr) |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3640 | { |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 3641 | return READ_ONCE(sock->ops)->getname(sock, addr, 0); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3642 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3643 | EXPORT_SYMBOL(kernel_getsockname); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3644 | |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 3645 | /** |
Miaohe Lin | 645f089 | 2020-08-27 07:27:49 -0400 | [diff] [blame] | 3646 | * kernel_getpeername - get the address which the socket is connected (kernel space) |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 3647 | * @sock: socket |
| 3648 | * @addr: address holder |
| 3649 | * |
| 3650 | * Fills the @addr pointer with the address which the socket is connected. |
Alex Maydanik | 0fc95de | 2022-02-12 12:29:27 +0200 | [diff] [blame] | 3651 | * Returns the length of the address in bytes or an error code. |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 3652 | */ |
| 3653 | |
Denys Vlasenko | 9b2c45d | 2018-02-12 20:00:20 +0100 | [diff] [blame] | 3654 | int kernel_getpeername(struct socket *sock, struct sockaddr *addr) |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3655 | { |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 3656 | return READ_ONCE(sock->ops)->getname(sock, addr, 1); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3657 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3658 | EXPORT_SYMBOL(kernel_getpeername); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3659 | |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 3660 | /** |
Miaohe Lin | 645f089 | 2020-08-27 07:27:49 -0400 | [diff] [blame] | 3661 | * 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] | 3662 | * @sock: socket |
| 3663 | * @how: connection part |
| 3664 | * |
| 3665 | * Returns 0 or an error. |
| 3666 | */ |
| 3667 | |
Trond Myklebust | 91cf45f | 2007-11-12 18:10:39 -0800 | [diff] [blame] | 3668 | int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how) |
| 3669 | { |
Eric Dumazet | 1ded5e5 | 2023-08-08 13:58:09 +0000 | [diff] [blame] | 3670 | return READ_ONCE(sock->ops)->shutdown(sock, how); |
Trond Myklebust | 91cf45f | 2007-11-12 18:10:39 -0800 | [diff] [blame] | 3671 | } |
Trond Myklebust | 91cf45f | 2007-11-12 18:10:39 -0800 | [diff] [blame] | 3672 | EXPORT_SYMBOL(kernel_sock_shutdown); |
R. Parameswaran | 113c307 | 2017-04-05 16:50:35 -0700 | [diff] [blame] | 3673 | |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 3674 | /** |
| 3675 | * kernel_sock_ip_overhead - returns the IP overhead imposed by a socket |
| 3676 | * @sk: socket |
| 3677 | * |
| 3678 | * This routine returns the IP overhead imposed by a socket i.e. |
| 3679 | * the length of the underlying IP header, depending on whether |
| 3680 | * this is an IPv4 or IPv6 socket and the length from IP options turned |
| 3681 | * 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] | 3682 | */ |
Pedro Tammela | 8a3c245 | 2019-03-14 10:45:23 -0300 | [diff] [blame] | 3683 | |
R. Parameswaran | 113c307 | 2017-04-05 16:50:35 -0700 | [diff] [blame] | 3684 | u32 kernel_sock_ip_overhead(struct sock *sk) |
| 3685 | { |
| 3686 | struct inet_sock *inet; |
| 3687 | struct ip_options_rcu *opt; |
| 3688 | u32 overhead = 0; |
R. Parameswaran | 113c307 | 2017-04-05 16:50:35 -0700 | [diff] [blame] | 3689 | #if IS_ENABLED(CONFIG_IPV6) |
| 3690 | struct ipv6_pinfo *np; |
| 3691 | struct ipv6_txoptions *optv6 = NULL; |
| 3692 | #endif /* IS_ENABLED(CONFIG_IPV6) */ |
| 3693 | |
| 3694 | if (!sk) |
| 3695 | return overhead; |
| 3696 | |
R. Parameswaran | 113c307 | 2017-04-05 16:50:35 -0700 | [diff] [blame] | 3697 | switch (sk->sk_family) { |
| 3698 | case AF_INET: |
| 3699 | inet = inet_sk(sk); |
| 3700 | overhead += sizeof(struct iphdr); |
| 3701 | opt = rcu_dereference_protected(inet->inet_opt, |
stephen hemminger | 614d79c | 2017-07-24 10:25:22 -0700 | [diff] [blame] | 3702 | sock_owned_by_user(sk)); |
R. Parameswaran | 113c307 | 2017-04-05 16:50:35 -0700 | [diff] [blame] | 3703 | if (opt) |
| 3704 | overhead += opt->opt.optlen; |
| 3705 | return overhead; |
| 3706 | #if IS_ENABLED(CONFIG_IPV6) |
| 3707 | case AF_INET6: |
| 3708 | np = inet6_sk(sk); |
| 3709 | overhead += sizeof(struct ipv6hdr); |
| 3710 | if (np) |
| 3711 | optv6 = rcu_dereference_protected(np->opt, |
stephen hemminger | 614d79c | 2017-07-24 10:25:22 -0700 | [diff] [blame] | 3712 | sock_owned_by_user(sk)); |
R. Parameswaran | 113c307 | 2017-04-05 16:50:35 -0700 | [diff] [blame] | 3713 | if (optv6) |
| 3714 | overhead += (optv6->opt_flen + optv6->opt_nflen); |
| 3715 | return overhead; |
| 3716 | #endif /* IS_ENABLED(CONFIG_IPV6) */ |
| 3717 | default: /* Returns 0 overhead if the socket is not ipv4 or ipv6 */ |
| 3718 | return overhead; |
| 3719 | } |
| 3720 | } |
| 3721 | EXPORT_SYMBOL(kernel_sock_ip_overhead); |