Steve French | 929be90 | 2021-06-18 00:31:49 -0500 | [diff] [blame] | 1 | // SPDX-License-Identifier: LGPL-2.1 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
Steve French | f19159d | 2010-04-21 04:12:10 +0000 | [diff] [blame] | 4 | * Copyright (C) International Business Machines Corp., 2002,2010 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * Author(s): Steve French (sfrench@us.ibm.com) |
| 6 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | */ |
| 8 | #include <linux/fs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | #include <linux/stat.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 10 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | #include <linux/pagemap.h> |
Jeff Layton | 4f73c7d | 2014-04-30 09:31:47 -0400 | [diff] [blame] | 12 | #include <linux/freezer.h> |
Ingo Molnar | 174cd4b | 2017-02-02 19:15:33 +0100 | [diff] [blame] | 13 | #include <linux/sched/signal.h> |
Ingo Molnar | 5dd43ce | 2017-06-20 12:19:09 +0200 | [diff] [blame] | 14 | #include <linux/wait_bit.h> |
Christoph Hellwig | 10c5db2 | 2020-05-23 09:30:11 +0200 | [diff] [blame] | 15 | #include <linux/fiemap.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | #include <asm/div64.h> |
| 17 | #include "cifsfs.h" |
| 18 | #include "cifspdu.h" |
| 19 | #include "cifsglob.h" |
| 20 | #include "cifsproto.h" |
Steve French | 6a5f659 | 2020-06-11 19:25:47 -0500 | [diff] [blame] | 21 | #include "smb2proto.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include "cifs_debug.h" |
| 23 | #include "cifs_fs_sb.h" |
Steve French | 2baa268 | 2014-09-27 02:19:01 -0500 | [diff] [blame] | 24 | #include "cifs_unicode.h" |
Suresh Jayaraman | 9451a9a | 2010-07-05 18:12:45 +0530 | [diff] [blame] | 25 | #include "fscache.h" |
Ronnie Sahlberg | 8401e93 | 2020-12-12 13:40:50 -0600 | [diff] [blame] | 26 | #include "fs_context.h" |
Steve French | 087f757 | 2021-04-29 00:18:43 -0500 | [diff] [blame] | 27 | #include "cifs_ioctl.h" |
Christoph Hellwig | 70eff55 | 2008-02-15 20:55:05 +0000 | [diff] [blame] | 28 | |
David Howells | 01c64fe | 2011-01-14 18:45:47 +0000 | [diff] [blame] | 29 | static void cifs_set_ops(struct inode *inode) |
Christoph Hellwig | 70eff55 | 2008-02-15 20:55:05 +0000 | [diff] [blame] | 30 | { |
| 31 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
| 32 | |
| 33 | switch (inode->i_mode & S_IFMT) { |
| 34 | case S_IFREG: |
| 35 | inode->i_op = &cifs_file_inode_ops; |
| 36 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { |
| 37 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
| 38 | inode->i_fop = &cifs_file_direct_nobrl_ops; |
| 39 | else |
| 40 | inode->i_fop = &cifs_file_direct_ops; |
Pavel Shilovsky | 8be7e6b | 2010-12-12 13:11:13 +0300 | [diff] [blame] | 41 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) { |
| 42 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
| 43 | inode->i_fop = &cifs_file_strict_nobrl_ops; |
| 44 | else |
| 45 | inode->i_fop = &cifs_file_strict_ops; |
Christoph Hellwig | 70eff55 | 2008-02-15 20:55:05 +0000 | [diff] [blame] | 46 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
| 47 | inode->i_fop = &cifs_file_nobrl_ops; |
| 48 | else { /* not direct, send byte range locks */ |
| 49 | inode->i_fop = &cifs_file_ops; |
| 50 | } |
| 51 | |
Matthew Wilcox (Oracle) | 704528d | 2022-03-23 21:29:04 -0400 | [diff] [blame] | 52 | /* check if server can support readahead */ |
Jones Syue | 1f641d9 | 2020-04-13 09:37:23 +0800 | [diff] [blame] | 53 | if (cifs_sb_master_tcon(cifs_sb)->ses->server->max_read < |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 54 | PAGE_SIZE + MAX_CIFS_HDR_SIZE) |
Christoph Hellwig | 70eff55 | 2008-02-15 20:55:05 +0000 | [diff] [blame] | 55 | inode->i_data.a_ops = &cifs_addr_ops_smallbuf; |
| 56 | else |
| 57 | inode->i_data.a_ops = &cifs_addr_ops; |
| 58 | break; |
| 59 | case S_IFDIR: |
Steve French | bc5b6e2 | 2008-03-11 21:07:48 +0000 | [diff] [blame] | 60 | #ifdef CONFIG_CIFS_DFS_UPCALL |
David Howells | 01c64fe | 2011-01-14 18:45:47 +0000 | [diff] [blame] | 61 | if (IS_AUTOMOUNT(inode)) { |
Igor Mammedov | 7962670 | 2008-03-09 03:44:18 +0000 | [diff] [blame] | 62 | inode->i_op = &cifs_dfs_referral_inode_operations; |
| 63 | } else { |
Steve French | bc5b6e2 | 2008-03-11 21:07:48 +0000 | [diff] [blame] | 64 | #else /* NO DFS support, treat as a directory */ |
| 65 | { |
| 66 | #endif |
Igor Mammedov | 7962670 | 2008-03-09 03:44:18 +0000 | [diff] [blame] | 67 | inode->i_op = &cifs_dir_inode_ops; |
| 68 | inode->i_fop = &cifs_dir_ops; |
| 69 | } |
Christoph Hellwig | 70eff55 | 2008-02-15 20:55:05 +0000 | [diff] [blame] | 70 | break; |
| 71 | case S_IFLNK: |
| 72 | inode->i_op = &cifs_symlink_inode_ops; |
| 73 | break; |
| 74 | default: |
| 75 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
| 76 | break; |
| 77 | } |
| 78 | } |
| 79 | |
Jeff Layton | df2cf17 | 2010-02-12 07:44:16 -0500 | [diff] [blame] | 80 | /* check inode attributes against fattr. If they don't match, tag the |
| 81 | * inode for cache invalidation |
| 82 | */ |
| 83 | static void |
| 84 | cifs_revalidate_cache(struct inode *inode, struct cifs_fattr *fattr) |
| 85 | { |
Rohith Surabattula | 40c845c | 2022-02-01 07:22:02 +0000 | [diff] [blame] | 86 | struct cifs_fscache_inode_coherency_data cd; |
Jeff Layton | df2cf17 | 2010-02-12 07:44:16 -0500 | [diff] [blame] | 87 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
| 88 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 89 | cifs_dbg(FYI, "%s: revalidating inode %llu\n", |
| 90 | __func__, cifs_i->uniqueid); |
Jeff Layton | df2cf17 | 2010-02-12 07:44:16 -0500 | [diff] [blame] | 91 | |
| 92 | if (inode->i_state & I_NEW) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 93 | cifs_dbg(FYI, "%s: inode %llu is new\n", |
| 94 | __func__, cifs_i->uniqueid); |
Jeff Layton | df2cf17 | 2010-02-12 07:44:16 -0500 | [diff] [blame] | 95 | return; |
| 96 | } |
| 97 | |
| 98 | /* don't bother with revalidation if we have an oplock */ |
Pavel Shilovsky | 18cceb6 | 2013-09-05 13:01:06 +0400 | [diff] [blame] | 99 | if (CIFS_CACHE_READ(cifs_i)) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 100 | cifs_dbg(FYI, "%s: inode %llu is oplocked\n", |
| 101 | __func__, cifs_i->uniqueid); |
Jeff Layton | df2cf17 | 2010-02-12 07:44:16 -0500 | [diff] [blame] | 102 | return; |
| 103 | } |
| 104 | |
| 105 | /* revalidate if mtime or size have changed */ |
Deepa Dinamani | 918c900 | 2019-12-02 21:19:41 -0800 | [diff] [blame] | 106 | fattr->cf_mtime = timestamp_truncate(fattr->cf_mtime, inode); |
Arnd Bergmann | 9539020 | 2018-06-19 17:27:58 +0200 | [diff] [blame] | 107 | if (timespec64_equal(&inode->i_mtime, &fattr->cf_mtime) && |
Jeff Layton | df2cf17 | 2010-02-12 07:44:16 -0500 | [diff] [blame] | 108 | cifs_i->server_eof == fattr->cf_eof) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 109 | cifs_dbg(FYI, "%s: inode %llu is unchanged\n", |
| 110 | __func__, cifs_i->uniqueid); |
Jeff Layton | df2cf17 | 2010-02-12 07:44:16 -0500 | [diff] [blame] | 111 | return; |
| 112 | } |
| 113 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 114 | cifs_dbg(FYI, "%s: invalidating inode %llu mapping\n", |
| 115 | __func__, cifs_i->uniqueid); |
Jeff Layton | aff8d5c | 2014-04-30 09:31:45 -0400 | [diff] [blame] | 116 | set_bit(CIFS_INO_INVALID_MAPPING, &cifs_i->flags); |
Rohith Surabattula | 40c845c | 2022-02-01 07:22:02 +0000 | [diff] [blame] | 117 | /* Invalidate fscache cookie */ |
| 118 | cifs_fscache_fill_coherency(&cifs_i->vfs_inode, &cd); |
| 119 | fscache_invalidate(cifs_inode_cookie(inode), &cd, i_size_read(inode), 0); |
Jeff Layton | df2cf17 | 2010-02-12 07:44:16 -0500 | [diff] [blame] | 120 | } |
| 121 | |
Jim McDonough | 74d290d | 2013-09-21 10:36:10 -0500 | [diff] [blame] | 122 | /* |
| 123 | * copy nlink to the inode, unless it wasn't provided. Provide |
| 124 | * sane values if we don't have an existing one and none was provided |
| 125 | */ |
| 126 | static void |
| 127 | cifs_nlink_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr) |
| 128 | { |
| 129 | /* |
| 130 | * if we're in a situation where we can't trust what we |
| 131 | * got from the server (readdir, some non-unix cases) |
| 132 | * fake reasonable values |
| 133 | */ |
| 134 | if (fattr->cf_flags & CIFS_FATTR_UNKNOWN_NLINK) { |
| 135 | /* only provide fake values on a new inode */ |
| 136 | if (inode->i_state & I_NEW) { |
| 137 | if (fattr->cf_cifsattrs & ATTR_DIRECTORY) |
| 138 | set_nlink(inode, 2); |
| 139 | else |
| 140 | set_nlink(inode, 1); |
| 141 | } |
| 142 | return; |
| 143 | } |
| 144 | |
| 145 | /* we trust the server, so update it */ |
| 146 | set_nlink(inode, fattr->cf_nlink); |
| 147 | } |
| 148 | |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 149 | /* populate an inode with info from a cifs_fattr struct */ |
Al Viro | 4d66952 | 2021-02-10 21:23:04 -0500 | [diff] [blame] | 150 | int |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 151 | cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr) |
Christoph Hellwig | 75f1298 | 2008-02-25 20:25:21 +0000 | [diff] [blame] | 152 | { |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 153 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 154 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
Christoph Hellwig | 75f1298 | 2008-02-25 20:25:21 +0000 | [diff] [blame] | 155 | |
Al Viro | 4d66952 | 2021-02-10 21:23:04 -0500 | [diff] [blame] | 156 | if (!(inode->i_state & I_NEW) && |
| 157 | unlikely(inode_wrong_type(inode, fattr->cf_mode))) { |
| 158 | CIFS_I(inode)->time = 0; /* force reval */ |
| 159 | return -ESTALE; |
| 160 | } |
| 161 | |
Jeff Layton | df2cf17 | 2010-02-12 07:44:16 -0500 | [diff] [blame] | 162 | cifs_revalidate_cache(inode, fattr); |
| 163 | |
Steve French | b7ca692 | 2012-08-03 08:43:01 -0500 | [diff] [blame] | 164 | spin_lock(&inode->i_lock); |
Deepa Dinamani | 918c900 | 2019-12-02 21:19:41 -0800 | [diff] [blame] | 165 | fattr->cf_mtime = timestamp_truncate(fattr->cf_mtime, inode); |
| 166 | fattr->cf_atime = timestamp_truncate(fattr->cf_atime, inode); |
| 167 | fattr->cf_ctime = timestamp_truncate(fattr->cf_ctime, inode); |
Steve French | 9b9c5be | 2018-09-22 12:07:06 -0500 | [diff] [blame] | 168 | /* we do not want atime to be less than mtime, it broke some apps */ |
Deepa Dinamani | 69738cf | 2019-11-29 21:30:25 -0800 | [diff] [blame] | 169 | if (timespec64_compare(&fattr->cf_atime, &fattr->cf_mtime) < 0) |
Steve French | 9b9c5be | 2018-09-22 12:07:06 -0500 | [diff] [blame] | 170 | inode->i_atime = fattr->cf_mtime; |
| 171 | else |
| 172 | inode->i_atime = fattr->cf_atime; |
Arnd Bergmann | 9539020 | 2018-06-19 17:27:58 +0200 | [diff] [blame] | 173 | inode->i_mtime = fattr->cf_mtime; |
| 174 | inode->i_ctime = fattr->cf_ctime; |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 175 | inode->i_rdev = fattr->cf_rdev; |
Jim McDonough | 74d290d | 2013-09-21 10:36:10 -0500 | [diff] [blame] | 176 | cifs_nlink_fattr_to_inode(inode, fattr); |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 177 | inode->i_uid = fattr->cf_uid; |
| 178 | inode->i_gid = fattr->cf_gid; |
| 179 | |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 180 | /* if dynperm is set, don't clobber existing mode */ |
| 181 | if (inode->i_state & I_NEW || |
| 182 | !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) |
| 183 | inode->i_mode = fattr->cf_mode; |
| 184 | |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 185 | cifs_i->cifsAttrs = fattr->cf_cifsattrs; |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 186 | |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 187 | if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL) |
| 188 | cifs_i->time = 0; |
| 189 | else |
| 190 | cifs_i->time = jiffies; |
| 191 | |
Jeff Layton | aff8d5c | 2014-04-30 09:31:45 -0400 | [diff] [blame] | 192 | if (fattr->cf_flags & CIFS_FATTR_DELETE_PENDING) |
| 193 | set_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags); |
| 194 | else |
| 195 | clear_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags); |
Christoph Hellwig | 75f1298 | 2008-02-25 20:25:21 +0000 | [diff] [blame] | 196 | |
Jeff Layton | 835a36c | 2010-02-10 16:21:33 -0500 | [diff] [blame] | 197 | cifs_i->server_eof = fattr->cf_eof; |
Christoph Hellwig | 75f1298 | 2008-02-25 20:25:21 +0000 | [diff] [blame] | 198 | /* |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 199 | * Can't safely change the file size here if the client is writing to |
| 200 | * it due to potential races. |
Christoph Hellwig | 75f1298 | 2008-02-25 20:25:21 +0000 | [diff] [blame] | 201 | */ |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 202 | if (is_size_safe_to_change(cifs_i, fattr->cf_eof)) { |
| 203 | i_size_write(inode, fattr->cf_eof); |
Christoph Hellwig | 75f1298 | 2008-02-25 20:25:21 +0000 | [diff] [blame] | 204 | |
| 205 | /* |
| 206 | * i_blocks is not related to (i_size / i_blksize), |
| 207 | * but instead 512 byte (2**9) size is required for |
| 208 | * calculating num blocks. |
| 209 | */ |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 210 | inode->i_blocks = (512 - 1 + fattr->cf_bytes) >> 9; |
Christoph Hellwig | 75f1298 | 2008-02-25 20:25:21 +0000 | [diff] [blame] | 211 | } |
| 212 | spin_unlock(&inode->i_lock); |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 213 | |
David Howells | 01c64fe | 2011-01-14 18:45:47 +0000 | [diff] [blame] | 214 | if (fattr->cf_flags & CIFS_FATTR_DFS_REFERRAL) |
| 215 | inode->i_flags |= S_AUTOMOUNT; |
Jeff Layton | c2b93e0 | 2013-05-07 11:28:31 -0400 | [diff] [blame] | 216 | if (inode->i_state & I_NEW) |
| 217 | cifs_set_ops(inode); |
Al Viro | 4d66952 | 2021-02-10 21:23:04 -0500 | [diff] [blame] | 218 | return 0; |
Christoph Hellwig | 75f1298 | 2008-02-25 20:25:21 +0000 | [diff] [blame] | 219 | } |
| 220 | |
Jeff Layton | 4065c80 | 2010-05-17 07:18:58 -0400 | [diff] [blame] | 221 | void |
| 222 | cifs_fill_uniqueid(struct super_block *sb, struct cifs_fattr *fattr) |
| 223 | { |
| 224 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
| 225 | |
| 226 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) |
| 227 | return; |
| 228 | |
| 229 | fattr->cf_uniqueid = iunique(sb, ROOT_I); |
| 230 | } |
| 231 | |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 232 | /* Fill a cifs_fattr struct with info from FILE_UNIX_BASIC_INFO. */ |
| 233 | void |
| 234 | cifs_unix_basic_to_fattr(struct cifs_fattr *fattr, FILE_UNIX_BASIC_INFO *info, |
| 235 | struct cifs_sb_info *cifs_sb) |
| 236 | { |
| 237 | memset(fattr, 0, sizeof(*fattr)); |
| 238 | fattr->cf_uniqueid = le64_to_cpu(info->UniqueId); |
| 239 | fattr->cf_bytes = le64_to_cpu(info->NumOfBytes); |
| 240 | fattr->cf_eof = le64_to_cpu(info->EndOfFile); |
| 241 | |
| 242 | fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); |
| 243 | fattr->cf_mtime = cifs_NTtimeToUnix(info->LastModificationTime); |
| 244 | fattr->cf_ctime = cifs_NTtimeToUnix(info->LastStatusChange); |
Steve French | 6e70e26 | 2017-09-21 21:32:29 -0500 | [diff] [blame] | 245 | /* old POSIX extensions don't get create time */ |
| 246 | |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 247 | fattr->cf_mode = le64_to_cpu(info->Permissions); |
| 248 | |
| 249 | /* |
| 250 | * Since we set the inode type below we need to mask off |
| 251 | * to avoid strange results if bits set above. |
| 252 | */ |
| 253 | fattr->cf_mode &= ~S_IFMT; |
| 254 | switch (le32_to_cpu(info->Type)) { |
| 255 | case UNIX_FILE: |
| 256 | fattr->cf_mode |= S_IFREG; |
| 257 | fattr->cf_dtype = DT_REG; |
| 258 | break; |
| 259 | case UNIX_SYMLINK: |
| 260 | fattr->cf_mode |= S_IFLNK; |
| 261 | fattr->cf_dtype = DT_LNK; |
| 262 | break; |
| 263 | case UNIX_DIR: |
| 264 | fattr->cf_mode |= S_IFDIR; |
| 265 | fattr->cf_dtype = DT_DIR; |
| 266 | break; |
| 267 | case UNIX_CHARDEV: |
| 268 | fattr->cf_mode |= S_IFCHR; |
| 269 | fattr->cf_dtype = DT_CHR; |
| 270 | fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor), |
| 271 | le64_to_cpu(info->DevMinor) & MINORMASK); |
| 272 | break; |
| 273 | case UNIX_BLOCKDEV: |
| 274 | fattr->cf_mode |= S_IFBLK; |
| 275 | fattr->cf_dtype = DT_BLK; |
| 276 | fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor), |
| 277 | le64_to_cpu(info->DevMinor) & MINORMASK); |
| 278 | break; |
| 279 | case UNIX_FIFO: |
| 280 | fattr->cf_mode |= S_IFIFO; |
| 281 | fattr->cf_dtype = DT_FIFO; |
| 282 | break; |
| 283 | case UNIX_SOCKET: |
| 284 | fattr->cf_mode |= S_IFSOCK; |
| 285 | fattr->cf_dtype = DT_SOCK; |
| 286 | break; |
| 287 | default: |
| 288 | /* safest to call it a file if we do not know */ |
| 289 | fattr->cf_mode |= S_IFREG; |
| 290 | fattr->cf_dtype = DT_REG; |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 291 | cifs_dbg(FYI, "unknown type %d\n", le32_to_cpu(info->Type)); |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 292 | break; |
| 293 | } |
| 294 | |
Ronnie Sahlberg | 8401e93 | 2020-12-12 13:40:50 -0600 | [diff] [blame] | 295 | fattr->cf_uid = cifs_sb->ctx->linux_uid; |
Eric W. Biederman | 46bbc25 | 2013-02-05 23:55:44 -0800 | [diff] [blame] | 296 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)) { |
| 297 | u64 id = le64_to_cpu(info->Uid); |
Eric W. Biederman | 4a2c8cf5 | 2013-02-06 01:53:25 -0800 | [diff] [blame] | 298 | if (id < ((uid_t)-1)) { |
| 299 | kuid_t uid = make_kuid(&init_user_ns, id); |
| 300 | if (uid_valid(uid)) |
| 301 | fattr->cf_uid = uid; |
| 302 | } |
Eric W. Biederman | 46bbc25 | 2013-02-05 23:55:44 -0800 | [diff] [blame] | 303 | } |
| 304 | |
Ronnie Sahlberg | 8401e93 | 2020-12-12 13:40:50 -0600 | [diff] [blame] | 305 | fattr->cf_gid = cifs_sb->ctx->linux_gid; |
Eric W. Biederman | 46bbc25 | 2013-02-05 23:55:44 -0800 | [diff] [blame] | 306 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)) { |
| 307 | u64 id = le64_to_cpu(info->Gid); |
Eric W. Biederman | 4a2c8cf5 | 2013-02-06 01:53:25 -0800 | [diff] [blame] | 308 | if (id < ((gid_t)-1)) { |
| 309 | kgid_t gid = make_kgid(&init_user_ns, id); |
| 310 | if (gid_valid(gid)) |
| 311 | fattr->cf_gid = gid; |
| 312 | } |
Eric W. Biederman | 46bbc25 | 2013-02-05 23:55:44 -0800 | [diff] [blame] | 313 | } |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 314 | |
| 315 | fattr->cf_nlink = le64_to_cpu(info->Nlinks); |
| 316 | } |
Steve French | b9a3260f | 2008-05-20 21:52:32 +0000 | [diff] [blame] | 317 | |
| 318 | /* |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 319 | * Fill a cifs_fattr struct with fake inode info. |
| 320 | * |
| 321 | * Needed to setup cifs_fattr data for the directory which is the |
| 322 | * junction to the new submount (ie to setup the fake directory |
| 323 | * which represents a DFS referral). |
Steve French | b9a3260f | 2008-05-20 21:52:32 +0000 | [diff] [blame] | 324 | */ |
Steve French | f1230c9 | 2009-07-22 23:13:01 +0000 | [diff] [blame] | 325 | static void |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 326 | cifs_create_dfs_fattr(struct cifs_fattr *fattr, struct super_block *sb) |
Steve French | 0e4bbde | 2008-05-20 19:50:46 +0000 | [diff] [blame] | 327 | { |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 328 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
Steve French | 0e4bbde | 2008-05-20 19:50:46 +0000 | [diff] [blame] | 329 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 330 | cifs_dbg(FYI, "creating fake fattr for DFS referral\n"); |
Steve French | 0e4bbde | 2008-05-20 19:50:46 +0000 | [diff] [blame] | 331 | |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 332 | memset(fattr, 0, sizeof(*fattr)); |
| 333 | fattr->cf_mode = S_IFDIR | S_IXUGO | S_IRWXU; |
Ronnie Sahlberg | 8401e93 | 2020-12-12 13:40:50 -0600 | [diff] [blame] | 334 | fattr->cf_uid = cifs_sb->ctx->linux_uid; |
| 335 | fattr->cf_gid = cifs_sb->ctx->linux_gid; |
Deepa Dinamani | 918c900 | 2019-12-02 21:19:41 -0800 | [diff] [blame] | 336 | ktime_get_coarse_real_ts64(&fattr->cf_mtime); |
Deepa Dinamani | e37fea5 | 2017-05-08 15:59:16 -0700 | [diff] [blame] | 337 | fattr->cf_atime = fattr->cf_ctime = fattr->cf_mtime; |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 338 | fattr->cf_nlink = 2; |
Steve French | 97aa495 | 2018-11-15 00:33:05 -0600 | [diff] [blame] | 339 | fattr->cf_flags = CIFS_FATTR_DFS_REFERRAL; |
Steve French | 0e4bbde | 2008-05-20 19:50:46 +0000 | [diff] [blame] | 340 | } |
| 341 | |
Pavel Shilovsky | 4ad6504 | 2012-09-18 16:20:26 -0700 | [diff] [blame] | 342 | static int |
| 343 | cifs_get_file_info_unix(struct file *filp) |
Jeff Layton | abab095 | 2010-02-12 07:44:18 -0500 | [diff] [blame] | 344 | { |
| 345 | int rc; |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 346 | unsigned int xid; |
Jeff Layton | abab095 | 2010-02-12 07:44:18 -0500 | [diff] [blame] | 347 | FILE_UNIX_BASIC_INFO find_data; |
| 348 | struct cifs_fattr fattr; |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 349 | struct inode *inode = file_inode(filp); |
Jeff Layton | abab095 | 2010-02-12 07:44:18 -0500 | [diff] [blame] | 350 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
Joe Perches | c21dfb6 | 2010-07-12 13:50:14 -0700 | [diff] [blame] | 351 | struct cifsFileInfo *cfile = filp->private_data; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 352 | struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); |
Jeff Layton | abab095 | 2010-02-12 07:44:18 -0500 | [diff] [blame] | 353 | |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 354 | xid = get_xid(); |
Pavel Shilovsky | 4b4de76 | 2012-09-18 16:20:26 -0700 | [diff] [blame] | 355 | rc = CIFSSMBUnixQFileInfo(xid, tcon, cfile->fid.netfid, &find_data); |
Jeff Layton | abab095 | 2010-02-12 07:44:18 -0500 | [diff] [blame] | 356 | if (!rc) { |
| 357 | cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb); |
| 358 | } else if (rc == -EREMOTE) { |
| 359 | cifs_create_dfs_fattr(&fattr, inode->i_sb); |
| 360 | rc = 0; |
Steve French | e39df24 | 2021-06-19 15:53:18 -0500 | [diff] [blame] | 361 | } else |
| 362 | goto cifs_gfiunix_out; |
Jeff Layton | abab095 | 2010-02-12 07:44:18 -0500 | [diff] [blame] | 363 | |
Al Viro | 4d66952 | 2021-02-10 21:23:04 -0500 | [diff] [blame] | 364 | rc = cifs_fattr_to_inode(inode, &fattr); |
Steve French | e39df24 | 2021-06-19 15:53:18 -0500 | [diff] [blame] | 365 | |
| 366 | cifs_gfiunix_out: |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 367 | free_xid(xid); |
Jeff Layton | abab095 | 2010-02-12 07:44:18 -0500 | [diff] [blame] | 368 | return rc; |
| 369 | } |
| 370 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | int cifs_get_inode_info_unix(struct inode **pinode, |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 372 | const unsigned char *full_path, |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 373 | struct super_block *sb, unsigned int xid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | { |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 375 | int rc; |
Steve French | 0e4bbde | 2008-05-20 19:50:46 +0000 | [diff] [blame] | 376 | FILE_UNIX_BASIC_INFO find_data; |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 377 | struct cifs_fattr fattr; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 378 | struct cifs_tcon *tcon; |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 379 | struct tcon_link *tlink; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 382 | cifs_dbg(FYI, "Getting info on %s\n", full_path); |
Igor Mammedov | 7962670 | 2008-03-09 03:44:18 +0000 | [diff] [blame] | 383 | |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 384 | tlink = cifs_sb_tlink(cifs_sb); |
| 385 | if (IS_ERR(tlink)) |
| 386 | return PTR_ERR(tlink); |
| 387 | tcon = tlink_tcon(tlink); |
| 388 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | /* could have done a find first instead but this returns more info */ |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 390 | rc = CIFSSMBUnixQPathInfo(xid, tcon, full_path, &find_data, |
Nakajima Akira | bc8ebdc4 | 2015-02-13 15:35:58 +0900 | [diff] [blame] | 391 | cifs_sb->local_nls, cifs_remap(cifs_sb)); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 392 | cifs_put_tlink(tlink); |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 393 | |
| 394 | if (!rc) { |
| 395 | cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb); |
| 396 | } else if (rc == -EREMOTE) { |
| 397 | cifs_create_dfs_fattr(&fattr, sb); |
Jeff Layton | e911d0c | 2008-07-12 13:47:59 -0700 | [diff] [blame] | 398 | rc = 0; |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 399 | } else { |
| 400 | return rc; |
Steve French | 0e4bbde | 2008-05-20 19:50:46 +0000 | [diff] [blame] | 401 | } |
| 402 | |
Stefan Metzmacher | 1b12b9c | 2010-08-05 21:19:56 +0200 | [diff] [blame] | 403 | /* check for Minshall+French symlinks */ |
| 404 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) { |
Sachin Prabhu | cb084b1 | 2013-11-25 17:09:50 +0000 | [diff] [blame] | 405 | int tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr, |
| 406 | full_path); |
Stefan Metzmacher | 1b12b9c | 2010-08-05 21:19:56 +0200 | [diff] [blame] | 407 | if (tmprc) |
Sachin Prabhu | cb084b1 | 2013-11-25 17:09:50 +0000 | [diff] [blame] | 408 | cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc); |
Stefan Metzmacher | 1b12b9c | 2010-08-05 21:19:56 +0200 | [diff] [blame] | 409 | } |
| 410 | |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 411 | if (*pinode == NULL) { |
| 412 | /* get new inode */ |
Jeff Layton | 4065c80 | 2010-05-17 07:18:58 -0400 | [diff] [blame] | 413 | cifs_fill_uniqueid(sb, &fattr); |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 414 | *pinode = cifs_iget(sb, &fattr); |
| 415 | if (!*pinode) |
| 416 | rc = -ENOMEM; |
| 417 | } else { |
| 418 | /* we already have inode, update it */ |
Nakajima Akira | 7196ac1 | 2015-04-22 15:24:44 +0900 | [diff] [blame] | 419 | |
| 420 | /* if uniqueid is different, return error */ |
| 421 | if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM && |
| 422 | CIFS_I(*pinode)->uniqueid != fattr.cf_uniqueid)) { |
Pavel Shilovsky | c82e5ac | 2019-09-30 10:06:19 -0700 | [diff] [blame] | 423 | CIFS_I(*pinode)->time = 0; /* force reval */ |
Nakajima Akira | 7196ac1 | 2015-04-22 15:24:44 +0900 | [diff] [blame] | 424 | rc = -ESTALE; |
| 425 | goto cgiiu_exit; |
| 426 | } |
| 427 | |
| 428 | /* if filetype is different, return error */ |
Al Viro | 4d66952 | 2021-02-10 21:23:04 -0500 | [diff] [blame] | 429 | rc = cifs_fattr_to_inode(*pinode, &fattr); |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 430 | } |
Steve French | 0e4bbde | 2008-05-20 19:50:46 +0000 | [diff] [blame] | 431 | |
Nakajima Akira | 7196ac1 | 2015-04-22 15:24:44 +0900 | [diff] [blame] | 432 | cgiiu_exit: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | return rc; |
| 434 | } |
| 435 | |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 436 | static int |
Pavel Shilovsky | 0360d60 | 2014-01-16 15:53:35 +0400 | [diff] [blame] | 437 | cifs_sfu_type(struct cifs_fattr *fattr, const char *path, |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 438 | struct cifs_sb_info *cifs_sb, unsigned int xid) |
Steve French | d6e2f2a4 | 2005-11-15 16:43:39 -0800 | [diff] [blame] | 439 | { |
| 440 | int rc; |
Steve French | db8b631 | 2014-09-22 05:13:55 -0500 | [diff] [blame] | 441 | __u32 oplock; |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 442 | struct tcon_link *tlink; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 443 | struct cifs_tcon *tcon; |
Pavel Shilovsky | d81b8a4 | 2014-01-16 15:53:36 +0400 | [diff] [blame] | 444 | struct cifs_fid fid; |
| 445 | struct cifs_open_parms oparms; |
Aurelien Aptel | 7c06514 | 2020-06-04 17:23:55 +0200 | [diff] [blame] | 446 | struct cifs_io_parms io_parms = {0}; |
Steve French | 86c96b4 | 2005-11-18 20:25:31 -0800 | [diff] [blame] | 447 | char buf[24]; |
Steve French | d6e2f2a4 | 2005-11-15 16:43:39 -0800 | [diff] [blame] | 448 | unsigned int bytes_read; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 449 | char *pbuf; |
Pavel Shilovsky | 0360d60 | 2014-01-16 15:53:35 +0400 | [diff] [blame] | 450 | int buf_type = CIFS_NO_BUFFER; |
Steve French | d6e2f2a4 | 2005-11-15 16:43:39 -0800 | [diff] [blame] | 451 | |
| 452 | pbuf = buf; |
| 453 | |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 454 | fattr->cf_mode &= ~S_IFMT; |
| 455 | |
| 456 | if (fattr->cf_eof == 0) { |
| 457 | fattr->cf_mode |= S_IFIFO; |
| 458 | fattr->cf_dtype = DT_FIFO; |
Steve French | d6e2f2a4 | 2005-11-15 16:43:39 -0800 | [diff] [blame] | 459 | return 0; |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 460 | } else if (fattr->cf_eof < 8) { |
| 461 | fattr->cf_mode |= S_IFREG; |
| 462 | fattr->cf_dtype = DT_REG; |
Steve French | d6e2f2a4 | 2005-11-15 16:43:39 -0800 | [diff] [blame] | 463 | return -EINVAL; /* EOPNOTSUPP? */ |
| 464 | } |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 465 | |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 466 | tlink = cifs_sb_tlink(cifs_sb); |
| 467 | if (IS_ERR(tlink)) |
| 468 | return PTR_ERR(tlink); |
| 469 | tcon = tlink_tcon(tlink); |
| 470 | |
Pavel Shilovsky | d81b8a4 | 2014-01-16 15:53:36 +0400 | [diff] [blame] | 471 | oparms.tcon = tcon; |
| 472 | oparms.cifs_sb = cifs_sb; |
| 473 | oparms.desired_access = GENERIC_READ; |
Amir Goldstein | 0f06093 | 2020-02-03 21:46:43 +0200 | [diff] [blame] | 474 | oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR); |
Pavel Shilovsky | d81b8a4 | 2014-01-16 15:53:36 +0400 | [diff] [blame] | 475 | oparms.disposition = FILE_OPEN; |
| 476 | oparms.path = path; |
| 477 | oparms.fid = &fid; |
| 478 | oparms.reconnect = false; |
| 479 | |
Steve French | db8b631 | 2014-09-22 05:13:55 -0500 | [diff] [blame] | 480 | if (tcon->ses->server->oplocks) |
| 481 | oplock = REQ_OPLOCK; |
| 482 | else |
| 483 | oplock = 0; |
| 484 | rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, NULL); |
Pavel Shilovsky | 0360d60 | 2014-01-16 15:53:35 +0400 | [diff] [blame] | 485 | if (rc) { |
Steve French | db8b631 | 2014-09-22 05:13:55 -0500 | [diff] [blame] | 486 | cifs_dbg(FYI, "check sfu type of %s, open rc = %d\n", path, rc); |
Pavel Shilovsky | 0360d60 | 2014-01-16 15:53:35 +0400 | [diff] [blame] | 487 | cifs_put_tlink(tlink); |
| 488 | return rc; |
Steve French | d6e2f2a4 | 2005-11-15 16:43:39 -0800 | [diff] [blame] | 489 | } |
Pavel Shilovsky | 0360d60 | 2014-01-16 15:53:35 +0400 | [diff] [blame] | 490 | |
| 491 | /* Read header */ |
Pavel Shilovsky | d81b8a4 | 2014-01-16 15:53:36 +0400 | [diff] [blame] | 492 | io_parms.netfid = fid.netfid; |
Pavel Shilovsky | 0360d60 | 2014-01-16 15:53:35 +0400 | [diff] [blame] | 493 | io_parms.pid = current->tgid; |
| 494 | io_parms.tcon = tcon; |
| 495 | io_parms.offset = 0; |
| 496 | io_parms.length = 24; |
| 497 | |
Steve French | db8b631 | 2014-09-22 05:13:55 -0500 | [diff] [blame] | 498 | rc = tcon->ses->server->ops->sync_read(xid, &fid, &io_parms, |
| 499 | &bytes_read, &pbuf, &buf_type); |
Pavel Shilovsky | 0360d60 | 2014-01-16 15:53:35 +0400 | [diff] [blame] | 500 | if ((rc == 0) && (bytes_read >= 8)) { |
| 501 | if (memcmp("IntxBLK", pbuf, 8) == 0) { |
| 502 | cifs_dbg(FYI, "Block device\n"); |
| 503 | fattr->cf_mode |= S_IFBLK; |
| 504 | fattr->cf_dtype = DT_BLK; |
| 505 | if (bytes_read == 24) { |
| 506 | /* we have enough to decode dev num */ |
| 507 | __u64 mjr; /* major */ |
| 508 | __u64 mnr; /* minor */ |
| 509 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); |
| 510 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); |
| 511 | fattr->cf_rdev = MKDEV(mjr, mnr); |
| 512 | } |
| 513 | } else if (memcmp("IntxCHR", pbuf, 8) == 0) { |
| 514 | cifs_dbg(FYI, "Char device\n"); |
| 515 | fattr->cf_mode |= S_IFCHR; |
| 516 | fattr->cf_dtype = DT_CHR; |
| 517 | if (bytes_read == 24) { |
| 518 | /* we have enough to decode dev num */ |
| 519 | __u64 mjr; /* major */ |
| 520 | __u64 mnr; /* minor */ |
| 521 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); |
| 522 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); |
| 523 | fattr->cf_rdev = MKDEV(mjr, mnr); |
| 524 | } |
| 525 | } else if (memcmp("IntxLNK", pbuf, 7) == 0) { |
| 526 | cifs_dbg(FYI, "Symlink\n"); |
| 527 | fattr->cf_mode |= S_IFLNK; |
| 528 | fattr->cf_dtype = DT_LNK; |
| 529 | } else { |
| 530 | fattr->cf_mode |= S_IFREG; /* file? */ |
| 531 | fattr->cf_dtype = DT_REG; |
| 532 | rc = -EOPNOTSUPP; |
| 533 | } |
| 534 | } else { |
| 535 | fattr->cf_mode |= S_IFREG; /* then it is a file */ |
| 536 | fattr->cf_dtype = DT_REG; |
| 537 | rc = -EOPNOTSUPP; /* or some unknown SFU type */ |
| 538 | } |
Steve French | db8b631 | 2014-09-22 05:13:55 -0500 | [diff] [blame] | 539 | |
| 540 | tcon->ses->server->ops->close(xid, tcon, &fid); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 541 | cifs_put_tlink(tlink); |
Steve French | d6e2f2a4 | 2005-11-15 16:43:39 -0800 | [diff] [blame] | 542 | return rc; |
Steve French | d6e2f2a4 | 2005-11-15 16:43:39 -0800 | [diff] [blame] | 543 | } |
| 544 | |
Steve French | 9e294f1 | 2005-11-17 16:59:21 -0800 | [diff] [blame] | 545 | #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */ |
| 546 | |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 547 | /* |
| 548 | * Fetch mode bits as provided by SFU. |
| 549 | * |
| 550 | * FIXME: Doesn't this clobber the type bit we got from cifs_sfu_type ? |
| 551 | */ |
| 552 | static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path, |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 553 | struct cifs_sb_info *cifs_sb, unsigned int xid) |
Steve French | 9e294f1 | 2005-11-17 16:59:21 -0800 | [diff] [blame] | 554 | { |
Steve French | 3020a1f | 2005-11-18 11:31:10 -0800 | [diff] [blame] | 555 | #ifdef CONFIG_CIFS_XATTR |
Steve French | 9e294f1 | 2005-11-17 16:59:21 -0800 | [diff] [blame] | 556 | ssize_t rc; |
| 557 | char ea_value[4]; |
| 558 | __u32 mode; |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 559 | struct tcon_link *tlink; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 560 | struct cifs_tcon *tcon; |
Steve French | 9e294f1 | 2005-11-17 16:59:21 -0800 | [diff] [blame] | 561 | |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 562 | tlink = cifs_sb_tlink(cifs_sb); |
| 563 | if (IS_ERR(tlink)) |
| 564 | return PTR_ERR(tlink); |
| 565 | tcon = tlink_tcon(tlink); |
| 566 | |
Steve French | d979f3b | 2014-02-01 23:27:18 -0600 | [diff] [blame] | 567 | if (tcon->ses->server->ops->query_all_EAs == NULL) { |
| 568 | cifs_put_tlink(tlink); |
| 569 | return -EOPNOTSUPP; |
| 570 | } |
| 571 | |
| 572 | rc = tcon->ses->server->ops->query_all_EAs(xid, tcon, path, |
| 573 | "SETFILEBITS", ea_value, 4 /* size of buf */, |
Steve French | 67b4c88 | 2017-05-12 20:59:10 -0500 | [diff] [blame] | 574 | cifs_sb); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 575 | cifs_put_tlink(tlink); |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 576 | if (rc < 0) |
Steve French | 9e294f1 | 2005-11-17 16:59:21 -0800 | [diff] [blame] | 577 | return (int)rc; |
| 578 | else if (rc > 3) { |
| 579 | mode = le32_to_cpu(*((__le32 *)ea_value)); |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 580 | fattr->cf_mode &= ~SFBITS_MASK; |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 581 | cifs_dbg(FYI, "special bits 0%o org mode 0%o\n", |
| 582 | mode, fattr->cf_mode); |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 583 | fattr->cf_mode = (mode & SFBITS_MASK) | fattr->cf_mode; |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 584 | cifs_dbg(FYI, "special mode bits 0%o\n", mode); |
Steve French | 9e294f1 | 2005-11-17 16:59:21 -0800 | [diff] [blame] | 585 | } |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 586 | |
| 587 | return 0; |
Steve French | 3020a1f | 2005-11-18 11:31:10 -0800 | [diff] [blame] | 588 | #else |
| 589 | return -EOPNOTSUPP; |
| 590 | #endif |
Steve French | 9e294f1 | 2005-11-17 16:59:21 -0800 | [diff] [blame] | 591 | } |
| 592 | |
Steve French | 6a5f659 | 2020-06-11 19:25:47 -0500 | [diff] [blame] | 593 | /* Fill a cifs_fattr struct with info from POSIX info struct */ |
| 594 | static void |
| 595 | smb311_posix_info_to_fattr(struct cifs_fattr *fattr, struct smb311_posix_qinfo *info, |
| 596 | struct super_block *sb, bool adjust_tz, bool symlink) |
| 597 | { |
| 598 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
| 599 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
| 600 | |
| 601 | memset(fattr, 0, sizeof(*fattr)); |
| 602 | |
| 603 | /* no fattr->flags to set */ |
| 604 | fattr->cf_cifsattrs = le32_to_cpu(info->DosAttributes); |
| 605 | fattr->cf_uniqueid = le64_to_cpu(info->Inode); |
| 606 | |
| 607 | if (info->LastAccessTime) |
| 608 | fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); |
| 609 | else |
| 610 | ktime_get_coarse_real_ts64(&fattr->cf_atime); |
| 611 | |
| 612 | fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime); |
| 613 | fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime); |
| 614 | |
| 615 | if (adjust_tz) { |
| 616 | fattr->cf_ctime.tv_sec += tcon->ses->server->timeAdj; |
| 617 | fattr->cf_mtime.tv_sec += tcon->ses->server->timeAdj; |
| 618 | } |
| 619 | |
| 620 | fattr->cf_eof = le64_to_cpu(info->EndOfFile); |
| 621 | fattr->cf_bytes = le64_to_cpu(info->AllocationSize); |
| 622 | fattr->cf_createtime = le64_to_cpu(info->CreationTime); |
| 623 | |
| 624 | fattr->cf_nlink = le32_to_cpu(info->HardLinks); |
| 625 | fattr->cf_mode = (umode_t) le32_to_cpu(info->Mode); |
| 626 | /* The srv fs device id is overridden on network mount so setting rdev isn't needed here */ |
| 627 | /* fattr->cf_rdev = le32_to_cpu(info->DeviceId); */ |
| 628 | |
| 629 | if (symlink) { |
| 630 | fattr->cf_mode |= S_IFLNK; |
| 631 | fattr->cf_dtype = DT_LNK; |
| 632 | } else if (fattr->cf_cifsattrs & ATTR_DIRECTORY) { |
| 633 | fattr->cf_mode |= S_IFDIR; |
| 634 | fattr->cf_dtype = DT_DIR; |
| 635 | } else { /* file */ |
| 636 | fattr->cf_mode |= S_IFREG; |
| 637 | fattr->cf_dtype = DT_REG; |
| 638 | } |
| 639 | /* else if reparse point ... TODO: add support for FIFO and blk dev; special file types */ |
| 640 | |
Ronnie Sahlberg | 8401e93 | 2020-12-12 13:40:50 -0600 | [diff] [blame] | 641 | fattr->cf_uid = cifs_sb->ctx->linux_uid; /* TODO: map uid and gid from SID */ |
| 642 | fattr->cf_gid = cifs_sb->ctx->linux_gid; |
Steve French | 6a5f659 | 2020-06-11 19:25:47 -0500 | [diff] [blame] | 643 | |
| 644 | cifs_dbg(FYI, "POSIX query info: mode 0x%x uniqueid 0x%llx nlink %d\n", |
| 645 | fattr->cf_mode, fattr->cf_uniqueid, fattr->cf_nlink); |
| 646 | } |
| 647 | |
| 648 | |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 649 | /* Fill a cifs_fattr struct with info from FILE_ALL_INFO */ |
Steve French | f1230c9 | 2009-07-22 23:13:01 +0000 | [diff] [blame] | 650 | static void |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 651 | cifs_all_info_to_fattr(struct cifs_fattr *fattr, FILE_ALL_INFO *info, |
Deepa Dinamani | e37fea5 | 2017-05-08 15:59:16 -0700 | [diff] [blame] | 652 | struct super_block *sb, bool adjust_tz, |
Steve French | 2e4564b | 2020-10-22 22:03:14 -0500 | [diff] [blame] | 653 | bool symlink, u32 reparse_tag) |
Steve French | b9a3260f | 2008-05-20 21:52:32 +0000 | [diff] [blame] | 654 | { |
Deepa Dinamani | e37fea5 | 2017-05-08 15:59:16 -0700 | [diff] [blame] | 655 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 656 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
Jeff Layton | 0d424ad | 2010-09-20 16:01:35 -0700 | [diff] [blame] | 657 | |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 658 | memset(fattr, 0, sizeof(*fattr)); |
| 659 | fattr->cf_cifsattrs = le32_to_cpu(info->Attributes); |
| 660 | if (info->DeletePending) |
| 661 | fattr->cf_flags |= CIFS_FATTR_DELETE_PENDING; |
Steve French | b9a3260f | 2008-05-20 21:52:32 +0000 | [diff] [blame] | 662 | |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 663 | if (info->LastAccessTime) |
| 664 | fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); |
Deepa Dinamani | 918c900 | 2019-12-02 21:19:41 -0800 | [diff] [blame] | 665 | else |
| 666 | ktime_get_coarse_real_ts64(&fattr->cf_atime); |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 667 | |
| 668 | fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime); |
| 669 | fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime); |
| 670 | |
| 671 | if (adjust_tz) { |
Jeff Layton | 0d424ad | 2010-09-20 16:01:35 -0700 | [diff] [blame] | 672 | fattr->cf_ctime.tv_sec += tcon->ses->server->timeAdj; |
| 673 | fattr->cf_mtime.tv_sec += tcon->ses->server->timeAdj; |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 674 | } |
| 675 | |
| 676 | fattr->cf_eof = le64_to_cpu(info->EndOfFile); |
| 677 | fattr->cf_bytes = le64_to_cpu(info->AllocationSize); |
Jeff Layton | 20054bd | 2011-01-07 11:30:27 -0500 | [diff] [blame] | 678 | fattr->cf_createtime = le64_to_cpu(info->CreationTime); |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 679 | |
Jim McDonough | 74d290d | 2013-09-21 10:36:10 -0500 | [diff] [blame] | 680 | fattr->cf_nlink = le32_to_cpu(info->NumberOfLinks); |
Steve French | 2e4564b | 2020-10-22 22:03:14 -0500 | [diff] [blame] | 681 | if (reparse_tag == IO_REPARSE_TAG_LX_SYMLINK) { |
Ronnie Sahlberg | 8401e93 | 2020-12-12 13:40:50 -0600 | [diff] [blame] | 682 | fattr->cf_mode |= S_IFLNK | cifs_sb->ctx->file_mode; |
Steve French | 2e4564b | 2020-10-22 22:03:14 -0500 | [diff] [blame] | 683 | fattr->cf_dtype = DT_LNK; |
| 684 | } else if (reparse_tag == IO_REPARSE_TAG_LX_FIFO) { |
Ronnie Sahlberg | 8401e93 | 2020-12-12 13:40:50 -0600 | [diff] [blame] | 685 | fattr->cf_mode |= S_IFIFO | cifs_sb->ctx->file_mode; |
Steve French | 2e4564b | 2020-10-22 22:03:14 -0500 | [diff] [blame] | 686 | fattr->cf_dtype = DT_FIFO; |
| 687 | } else if (reparse_tag == IO_REPARSE_TAG_AF_UNIX) { |
Ronnie Sahlberg | 8401e93 | 2020-12-12 13:40:50 -0600 | [diff] [blame] | 688 | fattr->cf_mode |= S_IFSOCK | cifs_sb->ctx->file_mode; |
Steve French | 2e4564b | 2020-10-22 22:03:14 -0500 | [diff] [blame] | 689 | fattr->cf_dtype = DT_SOCK; |
| 690 | } else if (reparse_tag == IO_REPARSE_TAG_LX_CHR) { |
Ronnie Sahlberg | 8401e93 | 2020-12-12 13:40:50 -0600 | [diff] [blame] | 691 | fattr->cf_mode |= S_IFCHR | cifs_sb->ctx->file_mode; |
Steve French | 2e4564b | 2020-10-22 22:03:14 -0500 | [diff] [blame] | 692 | fattr->cf_dtype = DT_CHR; |
| 693 | } else if (reparse_tag == IO_REPARSE_TAG_LX_BLK) { |
Ronnie Sahlberg | 8401e93 | 2020-12-12 13:40:50 -0600 | [diff] [blame] | 694 | fattr->cf_mode |= S_IFBLK | cifs_sb->ctx->file_mode; |
Steve French | 2e4564b | 2020-10-22 22:03:14 -0500 | [diff] [blame] | 695 | fattr->cf_dtype = DT_BLK; |
| 696 | } else if (symlink) { /* TODO add more reparse tag checks */ |
Pavel Shilovsky | eb85d94b | 2013-10-23 17:49:47 +0400 | [diff] [blame] | 697 | fattr->cf_mode = S_IFLNK; |
| 698 | fattr->cf_dtype = DT_LNK; |
| 699 | } else if (fattr->cf_cifsattrs & ATTR_DIRECTORY) { |
Ronnie Sahlberg | 8401e93 | 2020-12-12 13:40:50 -0600 | [diff] [blame] | 700 | fattr->cf_mode = S_IFDIR | cifs_sb->ctx->dir_mode; |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 701 | fattr->cf_dtype = DT_DIR; |
Pavel Shilovsky | 6de2ce4 | 2012-02-17 16:13:30 +0300 | [diff] [blame] | 702 | /* |
| 703 | * Server can return wrong NumberOfLinks value for directories |
| 704 | * when Unix extensions are disabled - fake it. |
| 705 | */ |
Jim McDonough | 74d290d | 2013-09-21 10:36:10 -0500 | [diff] [blame] | 706 | if (!tcon->unix_ext) |
| 707 | fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK; |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 708 | } else { |
Ronnie Sahlberg | 8401e93 | 2020-12-12 13:40:50 -0600 | [diff] [blame] | 709 | fattr->cf_mode = S_IFREG | cifs_sb->ctx->file_mode; |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 710 | fattr->cf_dtype = DT_REG; |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 711 | |
Jeff Layton | d0c280d | 2009-07-09 01:46:44 -0400 | [diff] [blame] | 712 | /* clear write bits if ATTR_READONLY is set */ |
| 713 | if (fattr->cf_cifsattrs & ATTR_READONLY) |
| 714 | fattr->cf_mode &= ~(S_IWUGO); |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 715 | |
Jim McDonough | 74d290d | 2013-09-21 10:36:10 -0500 | [diff] [blame] | 716 | /* |
| 717 | * Don't accept zero nlink from non-unix servers unless |
| 718 | * delete is pending. Instead mark it as unknown. |
| 719 | */ |
| 720 | if ((fattr->cf_nlink < 1) && !tcon->unix_ext && |
| 721 | !info->DeletePending) { |
Joe Perches | fb4b5f1 | 2020-02-21 05:20:45 -0800 | [diff] [blame] | 722 | cifs_dbg(VFS, "bogus file nlink value %u\n", |
| 723 | fattr->cf_nlink); |
Jim McDonough | 74d290d | 2013-09-21 10:36:10 -0500 | [diff] [blame] | 724 | fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK; |
Steve French | 6658b9f | 2013-07-04 14:38:48 -0500 | [diff] [blame] | 725 | } |
Pavel Shilovsky | 6de2ce4 | 2012-02-17 16:13:30 +0300 | [diff] [blame] | 726 | } |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 727 | |
Ronnie Sahlberg | 8401e93 | 2020-12-12 13:40:50 -0600 | [diff] [blame] | 728 | fattr->cf_uid = cifs_sb->ctx->linux_uid; |
| 729 | fattr->cf_gid = cifs_sb->ctx->linux_gid; |
Steve French | b9a3260f | 2008-05-20 21:52:32 +0000 | [diff] [blame] | 730 | } |
| 731 | |
Pavel Shilovsky | 4ad6504 | 2012-09-18 16:20:26 -0700 | [diff] [blame] | 732 | static int |
| 733 | cifs_get_file_info(struct file *filp) |
Jeff Layton | abab095 | 2010-02-12 07:44:18 -0500 | [diff] [blame] | 734 | { |
| 735 | int rc; |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 736 | unsigned int xid; |
Jeff Layton | abab095 | 2010-02-12 07:44:18 -0500 | [diff] [blame] | 737 | FILE_ALL_INFO find_data; |
| 738 | struct cifs_fattr fattr; |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 739 | struct inode *inode = file_inode(filp); |
Joe Perches | c21dfb6 | 2010-07-12 13:50:14 -0700 | [diff] [blame] | 740 | struct cifsFileInfo *cfile = filp->private_data; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 741 | struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); |
Pavel Shilovsky | 4ad6504 | 2012-09-18 16:20:26 -0700 | [diff] [blame] | 742 | struct TCP_Server_Info *server = tcon->ses->server; |
| 743 | |
| 744 | if (!server->ops->query_file_info) |
| 745 | return -ENOSYS; |
Jeff Layton | abab095 | 2010-02-12 07:44:18 -0500 | [diff] [blame] | 746 | |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 747 | xid = get_xid(); |
Pavel Shilovsky | 4ad6504 | 2012-09-18 16:20:26 -0700 | [diff] [blame] | 748 | rc = server->ops->query_file_info(xid, tcon, &cfile->fid, &find_data); |
Pavel Shilovsky | 42274bb | 2011-10-22 14:37:50 +0400 | [diff] [blame] | 749 | switch (rc) { |
| 750 | case 0: |
Steve French | 2e4564b | 2020-10-22 22:03:14 -0500 | [diff] [blame] | 751 | /* TODO: add support to query reparse tag */ |
Deepa Dinamani | e37fea5 | 2017-05-08 15:59:16 -0700 | [diff] [blame] | 752 | cifs_all_info_to_fattr(&fattr, &find_data, inode->i_sb, false, |
Steve French | 2e4564b | 2020-10-22 22:03:14 -0500 | [diff] [blame] | 753 | false, 0 /* no reparse tag */); |
Pavel Shilovsky | 42274bb | 2011-10-22 14:37:50 +0400 | [diff] [blame] | 754 | break; |
| 755 | case -EREMOTE: |
| 756 | cifs_create_dfs_fattr(&fattr, inode->i_sb); |
| 757 | rc = 0; |
| 758 | break; |
| 759 | case -EOPNOTSUPP: |
| 760 | case -EINVAL: |
Jeff Layton | abab095 | 2010-02-12 07:44:18 -0500 | [diff] [blame] | 761 | /* |
| 762 | * FIXME: legacy server -- fall back to path-based call? |
Steve French | ff215713 | 2010-03-09 20:30:42 +0000 | [diff] [blame] | 763 | * for now, just skip revalidating and mark inode for |
| 764 | * immediate reval. |
| 765 | */ |
Jeff Layton | abab095 | 2010-02-12 07:44:18 -0500 | [diff] [blame] | 766 | rc = 0; |
| 767 | CIFS_I(inode)->time = 0; |
Gustavo A. R. Silva | 21ac58f4 | 2020-11-20 12:24:14 -0600 | [diff] [blame] | 768 | goto cgfi_exit; |
Pavel Shilovsky | 42274bb | 2011-10-22 14:37:50 +0400 | [diff] [blame] | 769 | default: |
Jeff Layton | abab095 | 2010-02-12 07:44:18 -0500 | [diff] [blame] | 770 | goto cgfi_exit; |
Pavel Shilovsky | 42274bb | 2011-10-22 14:37:50 +0400 | [diff] [blame] | 771 | } |
Jeff Layton | abab095 | 2010-02-12 07:44:18 -0500 | [diff] [blame] | 772 | |
| 773 | /* |
| 774 | * don't bother with SFU junk here -- just mark inode as needing |
| 775 | * revalidation. |
| 776 | */ |
Jeff Layton | abab095 | 2010-02-12 07:44:18 -0500 | [diff] [blame] | 777 | fattr.cf_uniqueid = CIFS_I(inode)->uniqueid; |
| 778 | fattr.cf_flags |= CIFS_FATTR_NEED_REVAL; |
Al Viro | 4d66952 | 2021-02-10 21:23:04 -0500 | [diff] [blame] | 779 | /* if filetype is different, return error */ |
| 780 | rc = cifs_fattr_to_inode(inode, &fattr); |
Jeff Layton | abab095 | 2010-02-12 07:44:18 -0500 | [diff] [blame] | 781 | cgfi_exit: |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 782 | free_xid(xid); |
Jeff Layton | abab095 | 2010-02-12 07:44:18 -0500 | [diff] [blame] | 783 | return rc; |
| 784 | } |
| 785 | |
Steve French | 7ea884c | 2018-03-31 18:13:38 -0500 | [diff] [blame] | 786 | /* Simple function to return a 64 bit hash of string. Rarely called */ |
| 787 | static __u64 simple_hashstr(const char *str) |
| 788 | { |
Geert Uytterhoeven | 3995bbf | 2018-04-05 14:57:11 +0200 | [diff] [blame] | 789 | const __u64 hash_mult = 1125899906842597ULL; /* a big enough prime */ |
Steve French | 7ea884c | 2018-03-31 18:13:38 -0500 | [diff] [blame] | 790 | __u64 hash = 0; |
| 791 | |
| 792 | while (*str) |
| 793 | hash = (hash + (__u64) *str++) * hash_mult; |
| 794 | |
| 795 | return hash; |
| 796 | } |
| 797 | |
Aurelien Aptel | b8f7442b | 2019-11-18 21:04:08 +0100 | [diff] [blame] | 798 | /** |
| 799 | * cifs_backup_query_path_info - SMB1 fallback code to get ino |
| 800 | * |
| 801 | * Fallback code to get file metadata when we don't have access to |
Steve French | 607dfc7 | 2020-12-12 12:08:58 -0600 | [diff] [blame] | 802 | * full_path (EACCES) and have backup creds. |
Aurelien Aptel | b8f7442b | 2019-11-18 21:04:08 +0100 | [diff] [blame] | 803 | * |
Steve French | 607dfc7 | 2020-12-12 12:08:58 -0600 | [diff] [blame] | 804 | * @xid: transaction id used to identify original request in logs |
| 805 | * @tcon: information about the server share we have mounted |
| 806 | * @sb: the superblock stores info such as disk space available |
| 807 | * @full_path: name of the file we are getting the metadata for |
| 808 | * @resp_buf: will be set to cifs resp buf and needs to be freed with |
| 809 | * cifs_buf_release() when done with @data |
| 810 | * @data: will be set to search info result buffer |
Aurelien Aptel | b8f7442b | 2019-11-18 21:04:08 +0100 | [diff] [blame] | 811 | */ |
| 812 | static int |
| 813 | cifs_backup_query_path_info(int xid, |
| 814 | struct cifs_tcon *tcon, |
| 815 | struct super_block *sb, |
| 816 | const char *full_path, |
| 817 | void **resp_buf, |
| 818 | FILE_ALL_INFO **data) |
| 819 | { |
| 820 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
| 821 | struct cifs_search_info info = {0}; |
| 822 | u16 flags; |
| 823 | int rc; |
| 824 | |
| 825 | *resp_buf = NULL; |
| 826 | info.endOfSearch = false; |
| 827 | if (tcon->unix_ext) |
| 828 | info.info_level = SMB_FIND_FILE_UNIX; |
| 829 | else if ((tcon->ses->capabilities & |
| 830 | tcon->ses->server->vals->cap_nt_find) == 0) |
| 831 | info.info_level = SMB_FIND_FILE_INFO_STANDARD; |
| 832 | else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) |
| 833 | info.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO; |
| 834 | else /* no srvino useful for fallback to some netapp */ |
| 835 | info.info_level = SMB_FIND_FILE_DIRECTORY_INFO; |
| 836 | |
| 837 | flags = CIFS_SEARCH_CLOSE_ALWAYS | |
| 838 | CIFS_SEARCH_CLOSE_AT_END | |
| 839 | CIFS_SEARCH_BACKUP_SEARCH; |
| 840 | |
| 841 | rc = CIFSFindFirst(xid, tcon, full_path, |
| 842 | cifs_sb, NULL, flags, &info, false); |
| 843 | if (rc) |
| 844 | return rc; |
| 845 | |
| 846 | *resp_buf = (void *)info.ntwrk_buf_start; |
| 847 | *data = (FILE_ALL_INFO *)info.srch_entries_start; |
| 848 | return 0; |
| 849 | } |
| 850 | |
| 851 | static void |
| 852 | cifs_set_fattr_ino(int xid, |
| 853 | struct cifs_tcon *tcon, |
| 854 | struct super_block *sb, |
| 855 | struct inode **inode, |
| 856 | const char *full_path, |
| 857 | FILE_ALL_INFO *data, |
| 858 | struct cifs_fattr *fattr) |
| 859 | { |
| 860 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
| 861 | struct TCP_Server_Info *server = tcon->ses->server; |
| 862 | int rc; |
| 863 | |
| 864 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) { |
| 865 | if (*inode) |
| 866 | fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid; |
| 867 | else |
| 868 | fattr->cf_uniqueid = iunique(sb, ROOT_I); |
| 869 | return; |
| 870 | } |
| 871 | |
| 872 | /* |
| 873 | * If we have an inode pass a NULL tcon to ensure we don't |
| 874 | * make a round trip to the server. This only works for SMB2+. |
| 875 | */ |
| 876 | rc = server->ops->get_srv_inum(xid, |
| 877 | *inode ? NULL : tcon, |
| 878 | cifs_sb, full_path, |
| 879 | &fattr->cf_uniqueid, |
| 880 | data); |
| 881 | if (rc) { |
| 882 | /* |
| 883 | * If that fails reuse existing ino or generate one |
| 884 | * and disable server ones |
| 885 | */ |
| 886 | if (*inode) |
| 887 | fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid; |
| 888 | else { |
| 889 | fattr->cf_uniqueid = iunique(sb, ROOT_I); |
| 890 | cifs_autodisable_serverino(cifs_sb); |
| 891 | } |
| 892 | return; |
| 893 | } |
| 894 | |
| 895 | /* If no errors, check for zero root inode (invalid) */ |
| 896 | if (fattr->cf_uniqueid == 0 && strlen(full_path) == 0) { |
| 897 | cifs_dbg(FYI, "Invalid (0) inodenum\n"); |
| 898 | if (*inode) { |
| 899 | /* reuse */ |
| 900 | fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid; |
| 901 | } else { |
| 902 | /* make an ino by hashing the UNC */ |
| 903 | fattr->cf_flags |= CIFS_FATTR_FAKE_ROOT_INO; |
| 904 | fattr->cf_uniqueid = simple_hashstr(tcon->treeName); |
| 905 | } |
| 906 | } |
| 907 | } |
| 908 | |
| 909 | static inline bool is_inode_cache_good(struct inode *ino) |
| 910 | { |
| 911 | return ino && CIFS_CACHE_READ(CIFS_I(ino)) && CIFS_I(ino)->time != 0; |
| 912 | } |
| 913 | |
Pavel Shilovsky | 1208ef1 | 2012-05-27 17:34:43 +0400 | [diff] [blame] | 914 | int |
Aurelien Aptel | b8f7442b | 2019-11-18 21:04:08 +0100 | [diff] [blame] | 915 | cifs_get_inode_info(struct inode **inode, |
| 916 | const char *full_path, |
| 917 | FILE_ALL_INFO *in_data, |
| 918 | struct super_block *sb, int xid, |
Steve French | 42eacf9 | 2014-02-10 14:08:16 -0600 | [diff] [blame] | 919 | const struct cifs_fid *fid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | { |
Aurelien Aptel | b8f7442b | 2019-11-18 21:04:08 +0100 | [diff] [blame] | 921 | |
Pavel Shilovsky | 1208ef1 | 2012-05-27 17:34:43 +0400 | [diff] [blame] | 922 | struct cifs_tcon *tcon; |
| 923 | struct TCP_Server_Info *server; |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 924 | struct tcon_link *tlink; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
Pavel Shilovsky | 1208ef1 | 2012-05-27 17:34:43 +0400 | [diff] [blame] | 926 | bool adjust_tz = false; |
Aurelien Aptel | b8f7442b | 2019-11-18 21:04:08 +0100 | [diff] [blame] | 927 | struct cifs_fattr fattr = {0}; |
Steve French | 2e4564b | 2020-10-22 22:03:14 -0500 | [diff] [blame] | 928 | bool is_reparse_point = false; |
Aurelien Aptel | b8f7442b | 2019-11-18 21:04:08 +0100 | [diff] [blame] | 929 | FILE_ALL_INFO *data = in_data; |
| 930 | FILE_ALL_INFO *tmp_data = NULL; |
| 931 | void *smb1_backup_rsp_buf = NULL; |
| 932 | int rc = 0; |
| 933 | int tmprc = 0; |
Steve French | 2e4564b | 2020-10-22 22:03:14 -0500 | [diff] [blame] | 934 | __u32 reparse_tag = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 935 | |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 936 | tlink = cifs_sb_tlink(cifs_sb); |
| 937 | if (IS_ERR(tlink)) |
| 938 | return PTR_ERR(tlink); |
Pavel Shilovsky | 1208ef1 | 2012-05-27 17:34:43 +0400 | [diff] [blame] | 939 | tcon = tlink_tcon(tlink); |
| 940 | server = tcon->ses->server; |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 941 | |
Aurelien Aptel | b8f7442b | 2019-11-18 21:04:08 +0100 | [diff] [blame] | 942 | /* |
| 943 | * 1. Fetch file metadata if not provided (data) |
| 944 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | |
Aurelien Aptel | b8f7442b | 2019-11-18 21:04:08 +0100 | [diff] [blame] | 946 | if (!data) { |
| 947 | if (is_inode_cache_good(*inode)) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 948 | cifs_dbg(FYI, "No need to revalidate cached inode sizes\n"); |
Aurelien Aptel | b8f7442b | 2019-11-18 21:04:08 +0100 | [diff] [blame] | 949 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | } |
Aurelien Aptel | b8f7442b | 2019-11-18 21:04:08 +0100 | [diff] [blame] | 951 | tmp_data = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
| 952 | if (!tmp_data) { |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 953 | rc = -ENOMEM; |
Aurelien Aptel | b8f7442b | 2019-11-18 21:04:08 +0100 | [diff] [blame] | 954 | goto out; |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 955 | } |
Aurelien Aptel | b8f7442b | 2019-11-18 21:04:08 +0100 | [diff] [blame] | 956 | rc = server->ops->query_path_info(xid, tcon, cifs_sb, |
Steve French | 2e4564b | 2020-10-22 22:03:14 -0500 | [diff] [blame] | 957 | full_path, tmp_data, |
| 958 | &adjust_tz, &is_reparse_point); |
Eugene Korenevsky | a2809d0 | 2022-01-14 22:53:40 +0300 | [diff] [blame] | 959 | #ifdef CONFIG_CIFS_DFS_UPCALL |
| 960 | if (rc == -ENOENT && is_tcon_dfs(tcon)) |
| 961 | rc = cifs_dfs_query_info_nonascii_quirk(xid, tcon, |
| 962 | cifs_sb, |
| 963 | full_path); |
| 964 | #endif |
Aurelien Aptel | b8f7442b | 2019-11-18 21:04:08 +0100 | [diff] [blame] | 965 | data = tmp_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 966 | } |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 967 | |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 968 | /* |
Aurelien Aptel | b8f7442b | 2019-11-18 21:04:08 +0100 | [diff] [blame] | 969 | * 2. Convert it to internal cifs metadata (fattr) |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 970 | */ |
Aurelien Aptel | b8f7442b | 2019-11-18 21:04:08 +0100 | [diff] [blame] | 971 | |
| 972 | switch (rc) { |
| 973 | case 0: |
Steve French | 2e4564b | 2020-10-22 22:03:14 -0500 | [diff] [blame] | 974 | /* |
| 975 | * If the file is a reparse point, it is more complicated |
| 976 | * since we have to check if its reparse tag matches a known |
| 977 | * special file type e.g. symlink or fifo or char etc. |
| 978 | */ |
| 979 | if ((le32_to_cpu(data->Attributes) & ATTR_REPARSE) && |
| 980 | server->ops->query_reparse_tag) { |
| 981 | rc = server->ops->query_reparse_tag(xid, tcon, cifs_sb, |
| 982 | full_path, &reparse_tag); |
| 983 | cifs_dbg(FYI, "reparse tag 0x%x\n", reparse_tag); |
| 984 | } |
| 985 | cifs_all_info_to_fattr(&fattr, data, sb, adjust_tz, |
| 986 | is_reparse_point, reparse_tag); |
Aurelien Aptel | b8f7442b | 2019-11-18 21:04:08 +0100 | [diff] [blame] | 987 | break; |
| 988 | case -EREMOTE: |
| 989 | /* DFS link, no metadata available on this server */ |
| 990 | cifs_create_dfs_fattr(&fattr, sb); |
| 991 | rc = 0; |
| 992 | break; |
| 993 | case -EACCES: |
| 994 | /* |
| 995 | * perm errors, try again with backup flags if possible |
| 996 | * |
| 997 | * For SMB2 and later the backup intent flag |
| 998 | * is already sent if needed on open and there |
| 999 | * is no path based FindFirst operation to use |
| 1000 | * to retry with |
| 1001 | */ |
| 1002 | if (backup_cred(cifs_sb) && is_smb1_server(server)) { |
| 1003 | /* for easier reading */ |
| 1004 | FILE_DIRECTORY_INFO *fdi; |
| 1005 | SEARCH_ID_FULL_DIR_INFO *si; |
| 1006 | |
| 1007 | rc = cifs_backup_query_path_info(xid, tcon, sb, |
| 1008 | full_path, |
| 1009 | &smb1_backup_rsp_buf, |
| 1010 | &data); |
| 1011 | if (rc) |
| 1012 | goto out; |
| 1013 | |
| 1014 | fdi = (FILE_DIRECTORY_INFO *)data; |
| 1015 | si = (SEARCH_ID_FULL_DIR_INFO *)data; |
| 1016 | |
| 1017 | cifs_dir_info_to_fattr(&fattr, fdi, cifs_sb); |
| 1018 | fattr.cf_uniqueid = le64_to_cpu(si->UniqueId); |
| 1019 | /* uniqueid set, skip get inum step */ |
| 1020 | goto handle_mnt_opt; |
| 1021 | } else { |
| 1022 | /* nothing we can do, bail out */ |
| 1023 | goto out; |
| 1024 | } |
| 1025 | break; |
| 1026 | default: |
| 1027 | cifs_dbg(FYI, "%s: unhandled err rc %d\n", __func__, rc); |
| 1028 | goto out; |
Ross Lagerwall | a108471b | 2015-12-02 14:46:08 +0000 | [diff] [blame] | 1029 | } |
Steve French | b9a3260f | 2008-05-20 21:52:32 +0000 | [diff] [blame] | 1030 | |
Aurelien Aptel | b8f7442b | 2019-11-18 21:04:08 +0100 | [diff] [blame] | 1031 | /* |
| 1032 | * 3. Get or update inode number (fattr.cf_uniqueid) |
| 1033 | */ |
| 1034 | |
| 1035 | cifs_set_fattr_ino(xid, tcon, sb, inode, full_path, data, &fattr); |
| 1036 | |
| 1037 | /* |
| 1038 | * 4. Tweak fattr based on mount options |
| 1039 | */ |
| 1040 | |
| 1041 | handle_mnt_opt: |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 1042 | /* query for SFU type info if supported and needed */ |
| 1043 | if (fattr.cf_cifsattrs & ATTR_SYSTEM && |
| 1044 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { |
| 1045 | tmprc = cifs_sfu_type(&fattr, full_path, cifs_sb, xid); |
| 1046 | if (tmprc) |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1047 | cifs_dbg(FYI, "cifs_sfu_type failed: %d\n", tmprc); |
Steve French | b9a3260f | 2008-05-20 21:52:32 +0000 | [diff] [blame] | 1048 | } |
Steve French | b9a3260f | 2008-05-20 21:52:32 +0000 | [diff] [blame] | 1049 | |
Steve French | b9a3260f | 2008-05-20 21:52:32 +0000 | [diff] [blame] | 1050 | /* fill in 0777 bits from ACL */ |
Steve French | e2f8fbf | 2019-07-19 06:30:07 +0000 | [diff] [blame] | 1051 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID) { |
| 1052 | rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, true, |
| 1053 | full_path, fid); |
Ronnie Sahlberg | 01ec372 | 2020-09-03 10:02:39 +1000 | [diff] [blame] | 1054 | if (rc == -EREMOTE) |
| 1055 | rc = 0; |
Steve French | e2f8fbf | 2019-07-19 06:30:07 +0000 | [diff] [blame] | 1056 | if (rc) { |
| 1057 | cifs_dbg(FYI, "%s: Get mode from SID failed. rc=%d\n", |
Aurelien Aptel | b8f7442b | 2019-11-18 21:04:08 +0100 | [diff] [blame] | 1058 | __func__, rc); |
| 1059 | goto out; |
Steve French | e2f8fbf | 2019-07-19 06:30:07 +0000 | [diff] [blame] | 1060 | } |
| 1061 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { |
| 1062 | rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, false, |
Dan Carpenter via samba-technical | 68464b8 | 2019-11-26 15:11:15 +0300 | [diff] [blame] | 1063 | full_path, fid); |
Ronnie Sahlberg | 01ec372 | 2020-09-03 10:02:39 +1000 | [diff] [blame] | 1064 | if (rc == -EREMOTE) |
| 1065 | rc = 0; |
Dan Carpenter via samba-technical | 68464b8 | 2019-11-26 15:11:15 +0300 | [diff] [blame] | 1066 | if (rc) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1067 | cifs_dbg(FYI, "%s: Getting ACL failed with error: %d\n", |
| 1068 | __func__, rc); |
Aurelien Aptel | b8f7442b | 2019-11-18 21:04:08 +0100 | [diff] [blame] | 1069 | goto out; |
Shirish Pargaonkar | 78415d2 | 2010-11-27 11:37:26 -0600 | [diff] [blame] | 1070 | } |
Steve French | b9a3260f | 2008-05-20 21:52:32 +0000 | [diff] [blame] | 1071 | } |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 1072 | |
| 1073 | /* fill in remaining high mode bits e.g. SUID, VTX */ |
| 1074 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) |
| 1075 | cifs_sfu_mode(&fattr, full_path, cifs_sb, xid); |
| 1076 | |
Stefan Metzmacher | 1b12b9c | 2010-08-05 21:19:56 +0200 | [diff] [blame] | 1077 | /* check for Minshall+French symlinks */ |
| 1078 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) { |
Sachin Prabhu | cb084b1 | 2013-11-25 17:09:50 +0000 | [diff] [blame] | 1079 | tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr, |
| 1080 | full_path); |
Stefan Metzmacher | 1b12b9c | 2010-08-05 21:19:56 +0200 | [diff] [blame] | 1081 | if (tmprc) |
Sachin Prabhu | cb084b1 | 2013-11-25 17:09:50 +0000 | [diff] [blame] | 1082 | cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc); |
Stefan Metzmacher | 1b12b9c | 2010-08-05 21:19:56 +0200 | [diff] [blame] | 1083 | } |
| 1084 | |
Aurelien Aptel | b8f7442b | 2019-11-18 21:04:08 +0100 | [diff] [blame] | 1085 | /* |
| 1086 | * 5. Update inode with final fattr data |
| 1087 | */ |
| 1088 | |
Pavel Shilovsky | 1208ef1 | 2012-05-27 17:34:43 +0400 | [diff] [blame] | 1089 | if (!*inode) { |
| 1090 | *inode = cifs_iget(sb, &fattr); |
| 1091 | if (!*inode) |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 1092 | rc = -ENOMEM; |
| 1093 | } else { |
Nakajima Akira | 7196ac1 | 2015-04-22 15:24:44 +0900 | [diff] [blame] | 1094 | /* we already have inode, update it */ |
| 1095 | |
Ross Lagerwall | a108471b | 2015-12-02 14:46:08 +0000 | [diff] [blame] | 1096 | /* if uniqueid is different, return error */ |
| 1097 | if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM && |
| 1098 | CIFS_I(*inode)->uniqueid != fattr.cf_uniqueid)) { |
Pavel Shilovsky | c82e5ac | 2019-09-30 10:06:19 -0700 | [diff] [blame] | 1099 | CIFS_I(*inode)->time = 0; /* force reval */ |
Ross Lagerwall | a108471b | 2015-12-02 14:46:08 +0000 | [diff] [blame] | 1100 | rc = -ESTALE; |
Aurelien Aptel | b8f7442b | 2019-11-18 21:04:08 +0100 | [diff] [blame] | 1101 | goto out; |
Ross Lagerwall | a108471b | 2015-12-02 14:46:08 +0000 | [diff] [blame] | 1102 | } |
Nakajima Akira | 7196ac1 | 2015-04-22 15:24:44 +0900 | [diff] [blame] | 1103 | /* if filetype is different, return error */ |
Al Viro | 4d66952 | 2021-02-10 21:23:04 -0500 | [diff] [blame] | 1104 | rc = cifs_fattr_to_inode(*inode, &fattr); |
Steve French | b9a3260f | 2008-05-20 21:52:32 +0000 | [diff] [blame] | 1105 | } |
Aurelien Aptel | b8f7442b | 2019-11-18 21:04:08 +0100 | [diff] [blame] | 1106 | out: |
| 1107 | cifs_buf_release(smb1_backup_rsp_buf); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 1108 | cifs_put_tlink(tlink); |
Aurelien Aptel | b8f7442b | 2019-11-18 21:04:08 +0100 | [diff] [blame] | 1109 | kfree(tmp_data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | return rc; |
| 1111 | } |
| 1112 | |
Steve French | 6a5f659 | 2020-06-11 19:25:47 -0500 | [diff] [blame] | 1113 | int |
| 1114 | smb311_posix_get_inode_info(struct inode **inode, |
| 1115 | const char *full_path, |
| 1116 | struct super_block *sb, unsigned int xid) |
| 1117 | { |
| 1118 | struct cifs_tcon *tcon; |
Steve French | 6a5f659 | 2020-06-11 19:25:47 -0500 | [diff] [blame] | 1119 | struct tcon_link *tlink; |
| 1120 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
| 1121 | bool adjust_tz = false; |
| 1122 | struct cifs_fattr fattr = {0}; |
| 1123 | bool symlink = false; |
| 1124 | struct smb311_posix_qinfo *data = NULL; |
| 1125 | int rc = 0; |
| 1126 | int tmprc = 0; |
| 1127 | |
| 1128 | tlink = cifs_sb_tlink(cifs_sb); |
| 1129 | if (IS_ERR(tlink)) |
| 1130 | return PTR_ERR(tlink); |
| 1131 | tcon = tlink_tcon(tlink); |
Steve French | 6a5f659 | 2020-06-11 19:25:47 -0500 | [diff] [blame] | 1132 | |
| 1133 | /* |
| 1134 | * 1. Fetch file metadata |
| 1135 | */ |
| 1136 | |
| 1137 | if (is_inode_cache_good(*inode)) { |
| 1138 | cifs_dbg(FYI, "No need to revalidate cached inode sizes\n"); |
| 1139 | goto out; |
| 1140 | } |
| 1141 | data = kmalloc(sizeof(struct smb311_posix_qinfo), GFP_KERNEL); |
| 1142 | if (!data) { |
| 1143 | rc = -ENOMEM; |
| 1144 | goto out; |
| 1145 | } |
| 1146 | |
| 1147 | rc = smb311_posix_query_path_info(xid, tcon, cifs_sb, |
| 1148 | full_path, data, |
| 1149 | &adjust_tz, &symlink); |
| 1150 | |
| 1151 | /* |
| 1152 | * 2. Convert it to internal cifs metadata (fattr) |
| 1153 | */ |
| 1154 | |
| 1155 | switch (rc) { |
| 1156 | case 0: |
| 1157 | smb311_posix_info_to_fattr(&fattr, data, sb, adjust_tz, symlink); |
| 1158 | break; |
| 1159 | case -EREMOTE: |
| 1160 | /* DFS link, no metadata available on this server */ |
| 1161 | cifs_create_dfs_fattr(&fattr, sb); |
| 1162 | rc = 0; |
| 1163 | break; |
| 1164 | case -EACCES: |
| 1165 | /* |
| 1166 | * For SMB2 and later the backup intent flag |
| 1167 | * is already sent if needed on open and there |
| 1168 | * is no path based FindFirst operation to use |
| 1169 | * to retry with so nothing we can do, bail out |
| 1170 | */ |
| 1171 | goto out; |
| 1172 | default: |
| 1173 | cifs_dbg(FYI, "%s: unhandled err rc %d\n", __func__, rc); |
| 1174 | goto out; |
| 1175 | } |
| 1176 | |
| 1177 | |
| 1178 | /* |
Steve French | a7a519a | 2020-06-12 14:49:47 -0500 | [diff] [blame] | 1179 | * 3. Tweak fattr based on mount options |
Steve French | 6a5f659 | 2020-06-11 19:25:47 -0500 | [diff] [blame] | 1180 | */ |
| 1181 | |
| 1182 | /* check for Minshall+French symlinks */ |
| 1183 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) { |
| 1184 | tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr, |
| 1185 | full_path); |
| 1186 | if (tmprc) |
| 1187 | cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc); |
| 1188 | } |
| 1189 | |
| 1190 | /* |
Steve French | a7a519a | 2020-06-12 14:49:47 -0500 | [diff] [blame] | 1191 | * 4. Update inode with final fattr data |
Steve French | 6a5f659 | 2020-06-11 19:25:47 -0500 | [diff] [blame] | 1192 | */ |
| 1193 | |
| 1194 | if (!*inode) { |
| 1195 | *inode = cifs_iget(sb, &fattr); |
| 1196 | if (!*inode) |
| 1197 | rc = -ENOMEM; |
| 1198 | } else { |
| 1199 | /* we already have inode, update it */ |
| 1200 | |
| 1201 | /* if uniqueid is different, return error */ |
| 1202 | if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM && |
| 1203 | CIFS_I(*inode)->uniqueid != fattr.cf_uniqueid)) { |
| 1204 | CIFS_I(*inode)->time = 0; /* force reval */ |
| 1205 | rc = -ESTALE; |
| 1206 | goto out; |
| 1207 | } |
| 1208 | |
| 1209 | /* if filetype is different, return error */ |
Al Viro | 4d66952 | 2021-02-10 21:23:04 -0500 | [diff] [blame] | 1210 | rc = cifs_fattr_to_inode(*inode, &fattr); |
Steve French | 6a5f659 | 2020-06-11 19:25:47 -0500 | [diff] [blame] | 1211 | } |
| 1212 | out: |
| 1213 | cifs_put_tlink(tlink); |
| 1214 | kfree(data); |
| 1215 | return rc; |
| 1216 | } |
| 1217 | |
| 1218 | |
Steve French | 7f8ed42 | 2007-09-28 22:28:55 +0000 | [diff] [blame] | 1219 | static const struct inode_operations cifs_ipc_inode_ops = { |
| 1220 | .lookup = cifs_lookup, |
| 1221 | }; |
| 1222 | |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 1223 | static int |
| 1224 | cifs_find_inode(struct inode *inode, void *opaque) |
| 1225 | { |
| 1226 | struct cifs_fattr *fattr = (struct cifs_fattr *) opaque; |
| 1227 | |
Jeff Layton | f30b9c1 | 2010-07-19 18:00:17 -0400 | [diff] [blame] | 1228 | /* don't match inode with different uniqueid */ |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 1229 | if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid) |
| 1230 | return 0; |
| 1231 | |
Jeff Layton | 20054bd | 2011-01-07 11:30:27 -0500 | [diff] [blame] | 1232 | /* use createtime like an i_generation field */ |
| 1233 | if (CIFS_I(inode)->createtime != fattr->cf_createtime) |
| 1234 | return 0; |
| 1235 | |
Jeff Layton | f30b9c1 | 2010-07-19 18:00:17 -0400 | [diff] [blame] | 1236 | /* don't match inode of different type */ |
Al Viro | 6e3e2c4 | 2021-03-01 20:37:10 -0500 | [diff] [blame] | 1237 | if (inode_wrong_type(inode, fattr->cf_mode)) |
Jeff Layton | f30b9c1 | 2010-07-19 18:00:17 -0400 | [diff] [blame] | 1238 | return 0; |
| 1239 | |
Jeff Layton | 5acfec2 | 2010-08-02 17:43:54 -0400 | [diff] [blame] | 1240 | /* if it's not a directory or has no dentries, then flag it */ |
Al Viro | b3d9b7a | 2012-06-09 13:51:19 -0400 | [diff] [blame] | 1241 | if (S_ISDIR(inode->i_mode) && !hlist_empty(&inode->i_dentry)) |
Jeff Layton | 3d69438 | 2010-05-11 14:59:55 -0400 | [diff] [blame] | 1242 | fattr->cf_flags |= CIFS_FATTR_INO_COLLISION; |
Jeff Layton | 3d69438 | 2010-05-11 14:59:55 -0400 | [diff] [blame] | 1243 | |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 1244 | return 1; |
| 1245 | } |
| 1246 | |
| 1247 | static int |
| 1248 | cifs_init_inode(struct inode *inode, void *opaque) |
| 1249 | { |
| 1250 | struct cifs_fattr *fattr = (struct cifs_fattr *) opaque; |
| 1251 | |
| 1252 | CIFS_I(inode)->uniqueid = fattr->cf_uniqueid; |
Jeff Layton | 20054bd | 2011-01-07 11:30:27 -0500 | [diff] [blame] | 1253 | CIFS_I(inode)->createtime = fattr->cf_createtime; |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 1254 | return 0; |
| 1255 | } |
| 1256 | |
Jeff Layton | 5acfec2 | 2010-08-02 17:43:54 -0400 | [diff] [blame] | 1257 | /* |
| 1258 | * walk dentry list for an inode and report whether it has aliases that |
| 1259 | * are hashed. We use this to determine if a directory inode can actually |
| 1260 | * be used. |
| 1261 | */ |
| 1262 | static bool |
| 1263 | inode_has_hashed_dentries(struct inode *inode) |
| 1264 | { |
| 1265 | struct dentry *dentry; |
| 1266 | |
Nick Piggin | 873feea | 2011-01-07 17:50:06 +1100 | [diff] [blame] | 1267 | spin_lock(&inode->i_lock); |
Al Viro | 946e51f | 2014-10-26 19:19:16 -0400 | [diff] [blame] | 1268 | hlist_for_each_entry(dentry, &inode->i_dentry, d_u.d_alias) { |
Jeff Layton | 5acfec2 | 2010-08-02 17:43:54 -0400 | [diff] [blame] | 1269 | if (!d_unhashed(dentry) || IS_ROOT(dentry)) { |
Nick Piggin | 873feea | 2011-01-07 17:50:06 +1100 | [diff] [blame] | 1270 | spin_unlock(&inode->i_lock); |
Jeff Layton | 5acfec2 | 2010-08-02 17:43:54 -0400 | [diff] [blame] | 1271 | return true; |
| 1272 | } |
| 1273 | } |
Nick Piggin | 873feea | 2011-01-07 17:50:06 +1100 | [diff] [blame] | 1274 | spin_unlock(&inode->i_lock); |
Jeff Layton | 5acfec2 | 2010-08-02 17:43:54 -0400 | [diff] [blame] | 1275 | return false; |
| 1276 | } |
| 1277 | |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 1278 | /* Given fattrs, get a corresponding inode */ |
| 1279 | struct inode * |
| 1280 | cifs_iget(struct super_block *sb, struct cifs_fattr *fattr) |
| 1281 | { |
| 1282 | unsigned long hash; |
| 1283 | struct inode *inode; |
| 1284 | |
Jeff Layton | 3d69438 | 2010-05-11 14:59:55 -0400 | [diff] [blame] | 1285 | retry_iget5_locked: |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1286 | cifs_dbg(FYI, "looking for uniqueid=%llu\n", fattr->cf_uniqueid); |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 1287 | |
| 1288 | /* hash down to 32-bits on 32-bit arch */ |
| 1289 | hash = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid); |
| 1290 | |
| 1291 | inode = iget5_locked(sb, hash, cifs_find_inode, cifs_init_inode, fattr); |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 1292 | if (inode) { |
Jeff Layton | 5acfec2 | 2010-08-02 17:43:54 -0400 | [diff] [blame] | 1293 | /* was there a potentially problematic inode collision? */ |
Jeff Layton | 3d69438 | 2010-05-11 14:59:55 -0400 | [diff] [blame] | 1294 | if (fattr->cf_flags & CIFS_FATTR_INO_COLLISION) { |
Jeff Layton | 3d69438 | 2010-05-11 14:59:55 -0400 | [diff] [blame] | 1295 | fattr->cf_flags &= ~CIFS_FATTR_INO_COLLISION; |
Jeff Layton | 5acfec2 | 2010-08-02 17:43:54 -0400 | [diff] [blame] | 1296 | |
| 1297 | if (inode_has_hashed_dentries(inode)) { |
| 1298 | cifs_autodisable_serverino(CIFS_SB(sb)); |
| 1299 | iput(inode); |
| 1300 | fattr->cf_uniqueid = iunique(sb, ROOT_I); |
| 1301 | goto retry_iget5_locked; |
| 1302 | } |
Jeff Layton | 3d69438 | 2010-05-11 14:59:55 -0400 | [diff] [blame] | 1303 | } |
| 1304 | |
Al Viro | 4d66952 | 2021-02-10 21:23:04 -0500 | [diff] [blame] | 1305 | /* can't fail - see cifs_find_inode() */ |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 1306 | cifs_fattr_to_inode(inode, fattr); |
Linus Torvalds | 1751e8a | 2017-11-27 13:05:09 -0800 | [diff] [blame] | 1307 | if (sb->s_flags & SB_NOATIME) |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 1308 | inode->i_flags |= S_NOATIME | S_NOCMTIME; |
| 1309 | if (inode->i_state & I_NEW) { |
| 1310 | inode->i_ino = hash; |
David Howells | 70431bf | 2020-11-17 15:56:59 +0000 | [diff] [blame] | 1311 | cifs_fscache_get_inode_cookie(inode); |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 1312 | unlock_new_inode(inode); |
| 1313 | } |
| 1314 | } |
| 1315 | |
| 1316 | return inode; |
| 1317 | } |
| 1318 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1319 | /* gets root inode */ |
Shirish Pargaonkar | 9b6763e | 2011-02-21 23:56:59 -0600 | [diff] [blame] | 1320 | struct inode *cifs_root_iget(struct super_block *sb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1321 | { |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 1322 | unsigned int xid; |
Jeff Layton | 0d424ad | 2010-09-20 16:01:35 -0700 | [diff] [blame] | 1323 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 1324 | struct inode *inode = NULL; |
David Howells | ce634ab | 2008-02-07 00:15:33 -0800 | [diff] [blame] | 1325 | long rc; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 1326 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
Aurelien Aptel | a6b5058 | 2016-05-25 19:59:09 +0200 | [diff] [blame] | 1327 | char *path = NULL; |
| 1328 | int len; |
| 1329 | |
| 1330 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH) |
| 1331 | && cifs_sb->prepath) { |
| 1332 | len = strlen(cifs_sb->prepath); |
| 1333 | path = kzalloc(len + 2 /* leading sep + null */, GFP_KERNEL); |
| 1334 | if (path == NULL) |
| 1335 | return ERR_PTR(-ENOMEM); |
| 1336 | path[0] = '/'; |
| 1337 | memcpy(path+1, cifs_sb->prepath, len); |
| 1338 | } else { |
| 1339 | path = kstrdup("", GFP_KERNEL); |
| 1340 | if (path == NULL) |
| 1341 | return ERR_PTR(-ENOMEM); |
| 1342 | } |
David Howells | ce634ab | 2008-02-07 00:15:33 -0800 | [diff] [blame] | 1343 | |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 1344 | xid = get_xid(); |
Steve French | b5b374e | 2014-10-06 01:01:03 -0500 | [diff] [blame] | 1345 | if (tcon->unix_ext) { |
Aurelien Aptel | a6b5058 | 2016-05-25 19:59:09 +0200 | [diff] [blame] | 1346 | rc = cifs_get_inode_info_unix(&inode, path, sb, xid); |
Steve French | b5b374e | 2014-10-06 01:01:03 -0500 | [diff] [blame] | 1347 | /* some servers mistakenly claim POSIX support */ |
| 1348 | if (rc != -EOPNOTSUPP) |
| 1349 | goto iget_no_retry; |
Joe Perches | a0a3036 | 2020-04-14 22:42:53 -0700 | [diff] [blame] | 1350 | cifs_dbg(VFS, "server does not support POSIX extensions\n"); |
Steve French | b5b374e | 2014-10-06 01:01:03 -0500 | [diff] [blame] | 1351 | tcon->unix_ext = false; |
| 1352 | } |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 1353 | |
Aurelien Aptel | a6b5058 | 2016-05-25 19:59:09 +0200 | [diff] [blame] | 1354 | convert_delimiter(path, CIFS_DIR_SEP(cifs_sb)); |
Steve French | d313852 | 2020-06-11 22:43:01 -0500 | [diff] [blame] | 1355 | if (tcon->posix_extensions) |
| 1356 | rc = smb311_posix_get_inode_info(&inode, path, sb, xid); |
| 1357 | else |
| 1358 | rc = cifs_get_inode_info(&inode, path, NULL, sb, xid, NULL); |
Steve French | b5b374e | 2014-10-06 01:01:03 -0500 | [diff] [blame] | 1359 | |
| 1360 | iget_no_retry: |
Oskar Schirmer | a7851ce | 2010-11-10 21:06:13 +0000 | [diff] [blame] | 1361 | if (!inode) { |
| 1362 | inode = ERR_PTR(rc); |
| 1363 | goto out; |
| 1364 | } |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 1365 | |
Aurelien Aptel | b327a71 | 2018-01-24 13:46:10 +0100 | [diff] [blame] | 1366 | if (rc && tcon->pipe) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1367 | cifs_dbg(FYI, "ipc connection - fake read inode\n"); |
Steve French | b7ca692 | 2012-08-03 08:43:01 -0500 | [diff] [blame] | 1368 | spin_lock(&inode->i_lock); |
Steve French | 7f8ed42 | 2007-09-28 22:28:55 +0000 | [diff] [blame] | 1369 | inode->i_mode |= S_IFDIR; |
Miklos Szeredi | bfe8684 | 2011-10-28 14:13:29 +0200 | [diff] [blame] | 1370 | set_nlink(inode, 2); |
Steve French | 7f8ed42 | 2007-09-28 22:28:55 +0000 | [diff] [blame] | 1371 | inode->i_op = &cifs_ipc_inode_ops; |
| 1372 | inode->i_fop = &simple_dir_operations; |
Ronnie Sahlberg | 8401e93 | 2020-12-12 13:40:50 -0600 | [diff] [blame] | 1373 | inode->i_uid = cifs_sb->ctx->linux_uid; |
| 1374 | inode->i_gid = cifs_sb->ctx->linux_gid; |
Steve French | b7ca692 | 2012-08-03 08:43:01 -0500 | [diff] [blame] | 1375 | spin_unlock(&inode->i_lock); |
Steve French | ad66133 | 2008-08-12 14:14:40 +0000 | [diff] [blame] | 1376 | } else if (rc) { |
David Howells | ce634ab | 2008-02-07 00:15:33 -0800 | [diff] [blame] | 1377 | iget_failed(inode); |
Oskar Schirmer | a7851ce | 2010-11-10 21:06:13 +0000 | [diff] [blame] | 1378 | inode = ERR_PTR(rc); |
Steve French | 7f8ed42 | 2007-09-28 22:28:55 +0000 | [diff] [blame] | 1379 | } |
David Howells | 70431bf | 2020-11-17 15:56:59 +0000 | [diff] [blame] | 1380 | |
Oskar Schirmer | a7851ce | 2010-11-10 21:06:13 +0000 | [diff] [blame] | 1381 | out: |
Aurelien Aptel | a6b5058 | 2016-05-25 19:59:09 +0200 | [diff] [blame] | 1382 | kfree(path); |
Phillip Potter | 31cd106 | 2018-03-17 21:06:56 +0000 | [diff] [blame] | 1383 | free_xid(xid); |
David Howells | ce634ab | 2008-02-07 00:15:33 -0800 | [diff] [blame] | 1384 | return inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1385 | } |
| 1386 | |
Pavel Shilovsky | ed6875e | 2012-09-18 16:20:25 -0700 | [diff] [blame] | 1387 | int |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 1388 | cifs_set_file_info(struct inode *inode, struct iattr *attrs, unsigned int xid, |
Al Viro | f6f1f17 | 2021-03-18 15:44:05 -0400 | [diff] [blame] | 1389 | const char *full_path, __u32 dosattr) |
Steve French | 388e57b | 2008-09-16 23:50:58 +0000 | [diff] [blame] | 1390 | { |
Steve French | 388e57b | 2008-09-16 23:50:58 +0000 | [diff] [blame] | 1391 | bool set_time = false; |
Steve French | 388e57b | 2008-09-16 23:50:58 +0000 | [diff] [blame] | 1392 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
Pavel Shilovsky | 6bdf6db | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 1393 | struct TCP_Server_Info *server; |
Steve French | 388e57b | 2008-09-16 23:50:58 +0000 | [diff] [blame] | 1394 | FILE_BASIC_INFO info_buf; |
| 1395 | |
Steve French | 1adcb71 | 2009-02-25 14:19:56 +0000 | [diff] [blame] | 1396 | if (attrs == NULL) |
| 1397 | return -EINVAL; |
| 1398 | |
Pavel Shilovsky | 6bdf6db | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 1399 | server = cifs_sb_master_tcon(cifs_sb)->ses->server; |
| 1400 | if (!server->ops->set_file_info) |
| 1401 | return -ENOSYS; |
| 1402 | |
Steve French | fd09b7d | 2018-08-02 20:28:18 -0500 | [diff] [blame] | 1403 | info_buf.Pad = 0; |
| 1404 | |
Steve French | 388e57b | 2008-09-16 23:50:58 +0000 | [diff] [blame] | 1405 | if (attrs->ia_valid & ATTR_ATIME) { |
| 1406 | set_time = true; |
| 1407 | info_buf.LastAccessTime = |
Arnd Bergmann | 9539020 | 2018-06-19 17:27:58 +0200 | [diff] [blame] | 1408 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime)); |
Steve French | 388e57b | 2008-09-16 23:50:58 +0000 | [diff] [blame] | 1409 | } else |
| 1410 | info_buf.LastAccessTime = 0; |
| 1411 | |
| 1412 | if (attrs->ia_valid & ATTR_MTIME) { |
| 1413 | set_time = true; |
| 1414 | info_buf.LastWriteTime = |
Arnd Bergmann | 9539020 | 2018-06-19 17:27:58 +0200 | [diff] [blame] | 1415 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime)); |
Steve French | 388e57b | 2008-09-16 23:50:58 +0000 | [diff] [blame] | 1416 | } else |
| 1417 | info_buf.LastWriteTime = 0; |
| 1418 | |
| 1419 | /* |
| 1420 | * Samba throws this field away, but windows may actually use it. |
| 1421 | * Do not set ctime unless other time stamps are changed explicitly |
| 1422 | * (i.e. by utimes()) since we would then have a mix of client and |
| 1423 | * server times. |
| 1424 | */ |
| 1425 | if (set_time && (attrs->ia_valid & ATTR_CTIME)) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1426 | cifs_dbg(FYI, "CIFS - CTIME changed\n"); |
Steve French | 388e57b | 2008-09-16 23:50:58 +0000 | [diff] [blame] | 1427 | info_buf.ChangeTime = |
Arnd Bergmann | 9539020 | 2018-06-19 17:27:58 +0200 | [diff] [blame] | 1428 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime)); |
Steve French | 388e57b | 2008-09-16 23:50:58 +0000 | [diff] [blame] | 1429 | } else |
| 1430 | info_buf.ChangeTime = 0; |
| 1431 | |
| 1432 | info_buf.CreationTime = 0; /* don't change */ |
| 1433 | info_buf.Attributes = cpu_to_le32(dosattr); |
| 1434 | |
Pavel Shilovsky | 6bdf6db | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 1435 | return server->ops->set_file_info(inode, full_path, &info_buf, xid); |
Steve French | 388e57b | 2008-09-16 23:50:58 +0000 | [diff] [blame] | 1436 | } |
| 1437 | |
Jeff Layton | a12a1ac | 2008-09-23 11:48:35 -0400 | [diff] [blame] | 1438 | /* |
Pavel Shilovsky | ed6875e | 2012-09-18 16:20:25 -0700 | [diff] [blame] | 1439 | * Open the given file (if it isn't already), set the DELETE_ON_CLOSE bit |
Jeff Layton | a12a1ac | 2008-09-23 11:48:35 -0400 | [diff] [blame] | 1440 | * and rename it to a random name that hopefully won't conflict with |
| 1441 | * anything else. |
| 1442 | */ |
Pavel Shilovsky | ed6875e | 2012-09-18 16:20:25 -0700 | [diff] [blame] | 1443 | int |
| 1444 | cifs_rename_pending_delete(const char *full_path, struct dentry *dentry, |
| 1445 | const unsigned int xid) |
Jeff Layton | a12a1ac | 2008-09-23 11:48:35 -0400 | [diff] [blame] | 1446 | { |
| 1447 | int oplock = 0; |
| 1448 | int rc; |
Pavel Shilovsky | d81b8a4 | 2014-01-16 15:53:36 +0400 | [diff] [blame] | 1449 | struct cifs_fid fid; |
| 1450 | struct cifs_open_parms oparms; |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 1451 | struct inode *inode = d_inode(dentry); |
Jeff Layton | a12a1ac | 2008-09-23 11:48:35 -0400 | [diff] [blame] | 1452 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
| 1453 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 1454 | struct tcon_link *tlink; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 1455 | struct cifs_tcon *tcon; |
Steve French | 3270958 | 2008-10-20 00:44:19 +0000 | [diff] [blame] | 1456 | __u32 dosattr, origattr; |
| 1457 | FILE_BASIC_INFO *info_buf = NULL; |
Jeff Layton | a12a1ac | 2008-09-23 11:48:35 -0400 | [diff] [blame] | 1458 | |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 1459 | tlink = cifs_sb_tlink(cifs_sb); |
| 1460 | if (IS_ERR(tlink)) |
| 1461 | return PTR_ERR(tlink); |
| 1462 | tcon = tlink_tcon(tlink); |
| 1463 | |
Sachin Prabhu | c483a98 | 2013-03-05 19:25:56 +0000 | [diff] [blame] | 1464 | /* |
| 1465 | * We cannot rename the file if the server doesn't support |
| 1466 | * CAP_INFOLEVEL_PASSTHRU |
| 1467 | */ |
| 1468 | if (!(tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)) { |
| 1469 | rc = -EBUSY; |
| 1470 | goto out; |
| 1471 | } |
| 1472 | |
Pavel Shilovsky | d81b8a4 | 2014-01-16 15:53:36 +0400 | [diff] [blame] | 1473 | oparms.tcon = tcon; |
| 1474 | oparms.cifs_sb = cifs_sb; |
| 1475 | oparms.desired_access = DELETE | FILE_WRITE_ATTRIBUTES; |
Amir Goldstein | 0f06093 | 2020-02-03 21:46:43 +0200 | [diff] [blame] | 1476 | oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR); |
Pavel Shilovsky | d81b8a4 | 2014-01-16 15:53:36 +0400 | [diff] [blame] | 1477 | oparms.disposition = FILE_OPEN; |
| 1478 | oparms.path = full_path; |
| 1479 | oparms.fid = &fid; |
| 1480 | oparms.reconnect = false; |
| 1481 | |
| 1482 | rc = CIFS_open(xid, &oparms, &oplock, NULL); |
Jeff Layton | a12a1ac | 2008-09-23 11:48:35 -0400 | [diff] [blame] | 1483 | if (rc != 0) |
| 1484 | goto out; |
| 1485 | |
Steve French | 3270958 | 2008-10-20 00:44:19 +0000 | [diff] [blame] | 1486 | origattr = cifsInode->cifsAttrs; |
| 1487 | if (origattr == 0) |
| 1488 | origattr |= ATTR_NORMAL; |
| 1489 | |
| 1490 | dosattr = origattr & ~ATTR_READONLY; |
Jeff Layton | a12a1ac | 2008-09-23 11:48:35 -0400 | [diff] [blame] | 1491 | if (dosattr == 0) |
| 1492 | dosattr |= ATTR_NORMAL; |
| 1493 | dosattr |= ATTR_HIDDEN; |
| 1494 | |
Steve French | 3270958 | 2008-10-20 00:44:19 +0000 | [diff] [blame] | 1495 | /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */ |
| 1496 | if (dosattr != origattr) { |
| 1497 | info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL); |
| 1498 | if (info_buf == NULL) { |
| 1499 | rc = -ENOMEM; |
| 1500 | goto out_close; |
| 1501 | } |
| 1502 | info_buf->Attributes = cpu_to_le32(dosattr); |
Pavel Shilovsky | d81b8a4 | 2014-01-16 15:53:36 +0400 | [diff] [blame] | 1503 | rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid, |
Steve French | 3270958 | 2008-10-20 00:44:19 +0000 | [diff] [blame] | 1504 | current->tgid); |
| 1505 | /* although we would like to mark the file hidden |
| 1506 | if that fails we will still try to rename it */ |
Sachin Prabhu | 72d282d | 2013-03-05 19:25:55 +0000 | [diff] [blame] | 1507 | if (!rc) |
Steve French | 3270958 | 2008-10-20 00:44:19 +0000 | [diff] [blame] | 1508 | cifsInode->cifsAttrs = dosattr; |
| 1509 | else |
| 1510 | dosattr = origattr; /* since not able to change them */ |
Jeff Layton | a12a1ac | 2008-09-23 11:48:35 -0400 | [diff] [blame] | 1511 | } |
Jeff Layton | a12a1ac | 2008-09-23 11:48:35 -0400 | [diff] [blame] | 1512 | |
Jeff Layton | dd1db2d | 2008-10-16 19:27:12 -0400 | [diff] [blame] | 1513 | /* rename the file */ |
Pavel Shilovsky | d81b8a4 | 2014-01-16 15:53:36 +0400 | [diff] [blame] | 1514 | rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, NULL, |
| 1515 | cifs_sb->local_nls, |
Steve French | 2baa268 | 2014-09-27 02:19:01 -0500 | [diff] [blame] | 1516 | cifs_remap(cifs_sb)); |
Steve French | 3270958 | 2008-10-20 00:44:19 +0000 | [diff] [blame] | 1517 | if (rc != 0) { |
Sachin Prabhu | 47c78f4 | 2013-03-11 13:08:49 +0000 | [diff] [blame] | 1518 | rc = -EBUSY; |
Steve French | 3270958 | 2008-10-20 00:44:19 +0000 | [diff] [blame] | 1519 | goto undo_setattr; |
| 1520 | } |
Jeff Layton | 6d22f09 | 2008-09-23 11:48:35 -0400 | [diff] [blame] | 1521 | |
Steve French | 3270958 | 2008-10-20 00:44:19 +0000 | [diff] [blame] | 1522 | /* try to set DELETE_ON_CLOSE */ |
Jeff Layton | aff8d5c | 2014-04-30 09:31:45 -0400 | [diff] [blame] | 1523 | if (!test_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags)) { |
Pavel Shilovsky | d81b8a4 | 2014-01-16 15:53:36 +0400 | [diff] [blame] | 1524 | rc = CIFSSMBSetFileDisposition(xid, tcon, true, fid.netfid, |
Steve French | 3270958 | 2008-10-20 00:44:19 +0000 | [diff] [blame] | 1525 | current->tgid); |
| 1526 | /* |
| 1527 | * some samba versions return -ENOENT when we try to set the |
| 1528 | * file disposition here. Likely a samba bug, but work around |
| 1529 | * it for now. This means that some cifsXXX files may hang |
| 1530 | * around after they shouldn't. |
| 1531 | * |
| 1532 | * BB: remove this hack after more servers have the fix |
| 1533 | */ |
| 1534 | if (rc == -ENOENT) |
| 1535 | rc = 0; |
| 1536 | else if (rc != 0) { |
Sachin Prabhu | 47c78f4 | 2013-03-11 13:08:49 +0000 | [diff] [blame] | 1537 | rc = -EBUSY; |
Steve French | 3270958 | 2008-10-20 00:44:19 +0000 | [diff] [blame] | 1538 | goto undo_rename; |
| 1539 | } |
Jeff Layton | aff8d5c | 2014-04-30 09:31:45 -0400 | [diff] [blame] | 1540 | set_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags); |
Steve French | 3270958 | 2008-10-20 00:44:19 +0000 | [diff] [blame] | 1541 | } |
Jeff Layton | 7ce86d5 | 2008-09-24 11:32:59 -0400 | [diff] [blame] | 1542 | |
Jeff Layton | a12a1ac | 2008-09-23 11:48:35 -0400 | [diff] [blame] | 1543 | out_close: |
Pavel Shilovsky | d81b8a4 | 2014-01-16 15:53:36 +0400 | [diff] [blame] | 1544 | CIFSSMBClose(xid, tcon, fid.netfid); |
Jeff Layton | a12a1ac | 2008-09-23 11:48:35 -0400 | [diff] [blame] | 1545 | out: |
Steve French | 3270958 | 2008-10-20 00:44:19 +0000 | [diff] [blame] | 1546 | kfree(info_buf); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 1547 | cifs_put_tlink(tlink); |
Jeff Layton | a12a1ac | 2008-09-23 11:48:35 -0400 | [diff] [blame] | 1548 | return rc; |
Steve French | 3270958 | 2008-10-20 00:44:19 +0000 | [diff] [blame] | 1549 | |
| 1550 | /* |
| 1551 | * reset everything back to the original state. Don't bother |
| 1552 | * dealing with errors here since we can't do anything about |
| 1553 | * them anyway. |
| 1554 | */ |
| 1555 | undo_rename: |
Pavel Shilovsky | d81b8a4 | 2014-01-16 15:53:36 +0400 | [diff] [blame] | 1556 | CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, dentry->d_name.name, |
Steve French | 2baa268 | 2014-09-27 02:19:01 -0500 | [diff] [blame] | 1557 | cifs_sb->local_nls, cifs_remap(cifs_sb)); |
Steve French | 3270958 | 2008-10-20 00:44:19 +0000 | [diff] [blame] | 1558 | undo_setattr: |
| 1559 | if (dosattr != origattr) { |
| 1560 | info_buf->Attributes = cpu_to_le32(origattr); |
Pavel Shilovsky | d81b8a4 | 2014-01-16 15:53:36 +0400 | [diff] [blame] | 1561 | if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid, |
Steve French | 3270958 | 2008-10-20 00:44:19 +0000 | [diff] [blame] | 1562 | current->tgid)) |
| 1563 | cifsInode->cifsAttrs = origattr; |
| 1564 | } |
| 1565 | |
| 1566 | goto out_close; |
Jeff Layton | a12a1ac | 2008-09-23 11:48:35 -0400 | [diff] [blame] | 1567 | } |
| 1568 | |
Steve French | b7ca692 | 2012-08-03 08:43:01 -0500 | [diff] [blame] | 1569 | /* copied from fs/nfs/dir.c with small changes */ |
| 1570 | static void |
| 1571 | cifs_drop_nlink(struct inode *inode) |
| 1572 | { |
| 1573 | spin_lock(&inode->i_lock); |
| 1574 | if (inode->i_nlink > 0) |
| 1575 | drop_nlink(inode); |
| 1576 | spin_unlock(&inode->i_lock); |
| 1577 | } |
Steve French | ff69452 | 2009-04-20 19:45:13 +0000 | [diff] [blame] | 1578 | |
| 1579 | /* |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 1580 | * If d_inode(dentry) is null (usually meaning the cached dentry |
Steve French | ff69452 | 2009-04-20 19:45:13 +0000 | [diff] [blame] | 1581 | * is a negative dentry) then we would attempt a standard SMB delete, but |
Colin Ian King | 413d610 | 2018-10-26 19:07:21 +0100 | [diff] [blame] | 1582 | * if that fails we can not attempt the fall back mechanisms on EACCES |
| 1583 | * but will return the EACCES to the caller. Note that the VFS does not call |
Steve French | ff69452 | 2009-04-20 19:45:13 +0000 | [diff] [blame] | 1584 | * unlink on negative dentries currently. |
| 1585 | */ |
Jeff Layton | 5f0319a | 2008-09-16 14:05:16 -0400 | [diff] [blame] | 1586 | int cifs_unlink(struct inode *dir, struct dentry *dentry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1587 | { |
| 1588 | int rc = 0; |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 1589 | unsigned int xid; |
Al Viro | f6a9bc3 | 2021-03-05 17:36:04 -0500 | [diff] [blame] | 1590 | const char *full_path; |
| 1591 | void *page; |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 1592 | struct inode *inode = d_inode(dentry); |
Steve French | ff69452 | 2009-04-20 19:45:13 +0000 | [diff] [blame] | 1593 | struct cifsInodeInfo *cifs_inode; |
Jeff Layton | 5f0319a | 2008-09-16 14:05:16 -0400 | [diff] [blame] | 1594 | struct super_block *sb = dir->i_sb; |
| 1595 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 1596 | struct tcon_link *tlink; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 1597 | struct cifs_tcon *tcon; |
Pavel Shilovsky | ed6875e | 2012-09-18 16:20:25 -0700 | [diff] [blame] | 1598 | struct TCP_Server_Info *server; |
Steve French | 6050247 | 2008-10-07 18:42:52 +0000 | [diff] [blame] | 1599 | struct iattr *attrs = NULL; |
| 1600 | __u32 dosattr = 0, origattr = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1601 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1602 | cifs_dbg(FYI, "cifs_unlink, dir=0x%p, dentry=0x%p\n", dir, dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1603 | |
Steve French | 087f757 | 2021-04-29 00:18:43 -0500 | [diff] [blame] | 1604 | if (unlikely(cifs_forced_shutdown(cifs_sb))) |
| 1605 | return -EIO; |
| 1606 | |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 1607 | tlink = cifs_sb_tlink(cifs_sb); |
| 1608 | if (IS_ERR(tlink)) |
| 1609 | return PTR_ERR(tlink); |
| 1610 | tcon = tlink_tcon(tlink); |
Pavel Shilovsky | ed6875e | 2012-09-18 16:20:25 -0700 | [diff] [blame] | 1611 | server = tcon->ses->server; |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 1612 | |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 1613 | xid = get_xid(); |
Al Viro | f6a9bc3 | 2021-03-05 17:36:04 -0500 | [diff] [blame] | 1614 | page = alloc_dentry_path(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1615 | |
Steve French | 82e9367 | 2020-05-19 03:06:57 -0500 | [diff] [blame] | 1616 | if (tcon->nodelete) { |
| 1617 | rc = -EACCES; |
| 1618 | goto unlink_out; |
| 1619 | } |
| 1620 | |
Jeff Layton | 5f0319a | 2008-09-16 14:05:16 -0400 | [diff] [blame] | 1621 | /* Unlink can be called from rename so we can not take the |
| 1622 | * sb->s_vfs_rename_mutex here */ |
Al Viro | f6a9bc3 | 2021-03-05 17:36:04 -0500 | [diff] [blame] | 1623 | full_path = build_path_from_dentry(dentry, page); |
| 1624 | if (IS_ERR(full_path)) { |
| 1625 | rc = PTR_ERR(full_path); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 1626 | goto unlink_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1627 | } |
Steve French | 2d785a5 | 2007-07-15 01:48:57 +0000 | [diff] [blame] | 1628 | |
Rohith Surabattula | e3fc065 | 2021-09-17 18:14:26 +0000 | [diff] [blame] | 1629 | cifs_close_deferred_file_under_dentry(tcon, full_path); |
Pavel Shilovsky | 29e20f9 | 2012-07-13 13:58:14 +0400 | [diff] [blame] | 1630 | if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
| 1631 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { |
Jeff Layton | 5f0319a | 2008-09-16 14:05:16 -0400 | [diff] [blame] | 1632 | rc = CIFSPOSIXDelFile(xid, tcon, full_path, |
Steve French | 2d785a5 | 2007-07-15 01:48:57 +0000 | [diff] [blame] | 1633 | SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls, |
Steve French | 2baa268 | 2014-09-27 02:19:01 -0500 | [diff] [blame] | 1634 | cifs_remap(cifs_sb)); |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1635 | cifs_dbg(FYI, "posix del rc %d\n", rc); |
Steve French | 2d785a5 | 2007-07-15 01:48:57 +0000 | [diff] [blame] | 1636 | if ((rc == 0) || (rc == -ENOENT)) |
| 1637 | goto psx_del_no_retry; |
| 1638 | } |
| 1639 | |
Steve French | 6050247 | 2008-10-07 18:42:52 +0000 | [diff] [blame] | 1640 | retry_std_delete: |
Pavel Shilovsky | ed6875e | 2012-09-18 16:20:25 -0700 | [diff] [blame] | 1641 | if (!server->ops->unlink) { |
| 1642 | rc = -ENOSYS; |
| 1643 | goto psx_del_no_retry; |
| 1644 | } |
| 1645 | |
| 1646 | rc = server->ops->unlink(xid, tcon, full_path, cifs_sb); |
Steve French | 6050247 | 2008-10-07 18:42:52 +0000 | [diff] [blame] | 1647 | |
Steve French | 2d785a5 | 2007-07-15 01:48:57 +0000 | [diff] [blame] | 1648 | psx_del_no_retry: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1649 | if (!rc) { |
Jeff Layton | 5f0319a | 2008-09-16 14:05:16 -0400 | [diff] [blame] | 1650 | if (inode) |
Steve French | b7ca692 | 2012-08-03 08:43:01 -0500 | [diff] [blame] | 1651 | cifs_drop_nlink(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1652 | } else if (rc == -ENOENT) { |
Jeff Layton | 5f0319a | 2008-09-16 14:05:16 -0400 | [diff] [blame] | 1653 | d_drop(dentry); |
Sachin Prabhu | 47c78f4 | 2013-03-11 13:08:49 +0000 | [diff] [blame] | 1654 | } else if (rc == -EBUSY) { |
Pavel Shilovsky | ed6875e | 2012-09-18 16:20:25 -0700 | [diff] [blame] | 1655 | if (server->ops->rename_pending_delete) { |
| 1656 | rc = server->ops->rename_pending_delete(full_path, |
| 1657 | dentry, xid); |
| 1658 | if (rc == 0) |
| 1659 | cifs_drop_nlink(inode); |
| 1660 | } |
Steve French | ff69452 | 2009-04-20 19:45:13 +0000 | [diff] [blame] | 1661 | } else if ((rc == -EACCES) && (dosattr == 0) && inode) { |
Steve French | 388e57b | 2008-09-16 23:50:58 +0000 | [diff] [blame] | 1662 | attrs = kzalloc(sizeof(*attrs), GFP_KERNEL); |
| 1663 | if (attrs == NULL) { |
| 1664 | rc = -ENOMEM; |
| 1665 | goto out_reval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1666 | } |
Steve French | 388e57b | 2008-09-16 23:50:58 +0000 | [diff] [blame] | 1667 | |
| 1668 | /* try to reset dos attributes */ |
Steve French | ff69452 | 2009-04-20 19:45:13 +0000 | [diff] [blame] | 1669 | cifs_inode = CIFS_I(inode); |
| 1670 | origattr = cifs_inode->cifsAttrs; |
Steve French | 6050247 | 2008-10-07 18:42:52 +0000 | [diff] [blame] | 1671 | if (origattr == 0) |
| 1672 | origattr |= ATTR_NORMAL; |
| 1673 | dosattr = origattr & ~ATTR_READONLY; |
Steve French | 388e57b | 2008-09-16 23:50:58 +0000 | [diff] [blame] | 1674 | if (dosattr == 0) |
| 1675 | dosattr |= ATTR_NORMAL; |
| 1676 | dosattr |= ATTR_HIDDEN; |
| 1677 | |
| 1678 | rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); |
Steve French | 388e57b | 2008-09-16 23:50:58 +0000 | [diff] [blame] | 1679 | if (rc != 0) |
| 1680 | goto out_reval; |
Steve French | 6050247 | 2008-10-07 18:42:52 +0000 | [diff] [blame] | 1681 | |
| 1682 | goto retry_std_delete; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1683 | } |
Steve French | 6050247 | 2008-10-07 18:42:52 +0000 | [diff] [blame] | 1684 | |
| 1685 | /* undo the setattr if we errored out and it's needed */ |
| 1686 | if (rc != 0 && dosattr != 0) |
| 1687 | cifs_set_file_info(inode, attrs, xid, full_path, origattr); |
| 1688 | |
Steve French | 388e57b | 2008-09-16 23:50:58 +0000 | [diff] [blame] | 1689 | out_reval: |
Jeff Layton | 5f0319a | 2008-09-16 14:05:16 -0400 | [diff] [blame] | 1690 | if (inode) { |
Steve French | ff69452 | 2009-04-20 19:45:13 +0000 | [diff] [blame] | 1691 | cifs_inode = CIFS_I(inode); |
| 1692 | cifs_inode->time = 0; /* will force revalidate to get info |
Steve French | b2aeb9d | 2005-05-17 13:16:18 -0500 | [diff] [blame] | 1693 | when needed */ |
Deepa Dinamani | e37fea5 | 2017-05-08 15:59:16 -0700 | [diff] [blame] | 1694 | inode->i_ctime = current_time(inode); |
Steve French | b2aeb9d | 2005-05-17 13:16:18 -0500 | [diff] [blame] | 1695 | } |
Deepa Dinamani | e37fea5 | 2017-05-08 15:59:16 -0700 | [diff] [blame] | 1696 | dir->i_ctime = dir->i_mtime = current_time(dir); |
Steve French | ff69452 | 2009-04-20 19:45:13 +0000 | [diff] [blame] | 1697 | cifs_inode = CIFS_I(dir); |
Steve French | 6050247 | 2008-10-07 18:42:52 +0000 | [diff] [blame] | 1698 | CIFS_I(dir)->time = 0; /* force revalidate of dir as well */ |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 1699 | unlink_out: |
Al Viro | f6a9bc3 | 2021-03-05 17:36:04 -0500 | [diff] [blame] | 1700 | free_dentry_path(page); |
Steve French | 6050247 | 2008-10-07 18:42:52 +0000 | [diff] [blame] | 1701 | kfree(attrs); |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 1702 | free_xid(xid); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 1703 | cifs_put_tlink(tlink); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1704 | return rc; |
| 1705 | } |
| 1706 | |
Pavel Shilovsky | ff691e9 | 2012-07-13 14:04:46 +0400 | [diff] [blame] | 1707 | static int |
Jeff Layton | 101b92d | 2012-09-19 06:22:45 -0700 | [diff] [blame] | 1708 | cifs_mkdir_qinfo(struct inode *parent, struct dentry *dentry, umode_t mode, |
Pavel Shilovsky | ff691e9 | 2012-07-13 14:04:46 +0400 | [diff] [blame] | 1709 | const char *full_path, struct cifs_sb_info *cifs_sb, |
| 1710 | struct cifs_tcon *tcon, const unsigned int xid) |
| 1711 | { |
| 1712 | int rc = 0; |
Jeff Layton | 101b92d | 2012-09-19 06:22:45 -0700 | [diff] [blame] | 1713 | struct inode *inode = NULL; |
Pavel Shilovsky | ff691e9 | 2012-07-13 14:04:46 +0400 | [diff] [blame] | 1714 | |
Steve French | d313852 | 2020-06-11 22:43:01 -0500 | [diff] [blame] | 1715 | if (tcon->posix_extensions) |
| 1716 | rc = smb311_posix_get_inode_info(&inode, full_path, parent->i_sb, xid); |
| 1717 | else if (tcon->unix_ext) |
Jeff Layton | 101b92d | 2012-09-19 06:22:45 -0700 | [diff] [blame] | 1718 | rc = cifs_get_inode_info_unix(&inode, full_path, parent->i_sb, |
Pavel Shilovsky | ff691e9 | 2012-07-13 14:04:46 +0400 | [diff] [blame] | 1719 | xid); |
| 1720 | else |
Jeff Layton | 101b92d | 2012-09-19 06:22:45 -0700 | [diff] [blame] | 1721 | rc = cifs_get_inode_info(&inode, full_path, NULL, parent->i_sb, |
| 1722 | xid, NULL); |
| 1723 | |
Pavel Shilovsky | ff691e9 | 2012-07-13 14:04:46 +0400 | [diff] [blame] | 1724 | if (rc) |
| 1725 | return rc; |
| 1726 | |
Al Viro | 3bcb39b | 2021-02-10 22:13:03 -0500 | [diff] [blame] | 1727 | if (!S_ISDIR(inode->i_mode)) { |
| 1728 | /* |
| 1729 | * mkdir succeeded, but another client has managed to remove the |
| 1730 | * sucker and replace it with non-directory. Return success, |
| 1731 | * but don't leave the child in dcache. |
| 1732 | */ |
| 1733 | iput(inode); |
| 1734 | d_drop(dentry); |
| 1735 | return 0; |
| 1736 | } |
Pavel Shilovsky | ff691e9 | 2012-07-13 14:04:46 +0400 | [diff] [blame] | 1737 | /* |
| 1738 | * setting nlink not necessary except in cases where we failed to get it |
Jeff Layton | 101b92d | 2012-09-19 06:22:45 -0700 | [diff] [blame] | 1739 | * from the server or was set bogus. Also, since this is a brand new |
| 1740 | * inode, no need to grab the i_lock before setting the i_nlink. |
Pavel Shilovsky | ff691e9 | 2012-07-13 14:04:46 +0400 | [diff] [blame] | 1741 | */ |
Jeff Layton | 101b92d | 2012-09-19 06:22:45 -0700 | [diff] [blame] | 1742 | if (inode->i_nlink < 2) |
| 1743 | set_nlink(inode, 2); |
Pavel Shilovsky | ff691e9 | 2012-07-13 14:04:46 +0400 | [diff] [blame] | 1744 | mode &= ~current_umask(); |
| 1745 | /* must turn on setgid bit if parent dir has it */ |
Jeff Layton | 101b92d | 2012-09-19 06:22:45 -0700 | [diff] [blame] | 1746 | if (parent->i_mode & S_ISGID) |
Pavel Shilovsky | ff691e9 | 2012-07-13 14:04:46 +0400 | [diff] [blame] | 1747 | mode |= S_ISGID; |
| 1748 | |
| 1749 | if (tcon->unix_ext) { |
| 1750 | struct cifs_unix_set_info_args args = { |
| 1751 | .mode = mode, |
| 1752 | .ctime = NO_CHANGE_64, |
| 1753 | .atime = NO_CHANGE_64, |
| 1754 | .mtime = NO_CHANGE_64, |
| 1755 | .device = 0, |
| 1756 | }; |
| 1757 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
Eric W. Biederman | 49418b2 | 2013-02-06 00:57:56 -0800 | [diff] [blame] | 1758 | args.uid = current_fsuid(); |
Jeff Layton | 101b92d | 2012-09-19 06:22:45 -0700 | [diff] [blame] | 1759 | if (parent->i_mode & S_ISGID) |
Eric W. Biederman | 49418b2 | 2013-02-06 00:57:56 -0800 | [diff] [blame] | 1760 | args.gid = parent->i_gid; |
Pavel Shilovsky | ff691e9 | 2012-07-13 14:04:46 +0400 | [diff] [blame] | 1761 | else |
Eric W. Biederman | 49418b2 | 2013-02-06 00:57:56 -0800 | [diff] [blame] | 1762 | args.gid = current_fsgid(); |
Pavel Shilovsky | ff691e9 | 2012-07-13 14:04:46 +0400 | [diff] [blame] | 1763 | } else { |
Eric W. Biederman | 49418b2 | 2013-02-06 00:57:56 -0800 | [diff] [blame] | 1764 | args.uid = INVALID_UID; /* no change */ |
| 1765 | args.gid = INVALID_GID; /* no change */ |
Pavel Shilovsky | ff691e9 | 2012-07-13 14:04:46 +0400 | [diff] [blame] | 1766 | } |
| 1767 | CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args, |
| 1768 | cifs_sb->local_nls, |
Steve French | 2baa268 | 2014-09-27 02:19:01 -0500 | [diff] [blame] | 1769 | cifs_remap(cifs_sb)); |
Pavel Shilovsky | ff691e9 | 2012-07-13 14:04:46 +0400 | [diff] [blame] | 1770 | } else { |
Pavel Shilovsky | f436720 | 2012-03-17 11:41:12 +0300 | [diff] [blame] | 1771 | struct TCP_Server_Info *server = tcon->ses->server; |
Pavel Shilovsky | ff691e9 | 2012-07-13 14:04:46 +0400 | [diff] [blame] | 1772 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) && |
Pavel Shilovsky | f436720 | 2012-03-17 11:41:12 +0300 | [diff] [blame] | 1773 | (mode & S_IWUGO) == 0 && server->ops->mkdir_setinfo) |
Jeff Layton | 101b92d | 2012-09-19 06:22:45 -0700 | [diff] [blame] | 1774 | server->ops->mkdir_setinfo(inode, full_path, cifs_sb, |
Pavel Shilovsky | f436720 | 2012-03-17 11:41:12 +0300 | [diff] [blame] | 1775 | tcon, xid); |
Jeff Layton | 101b92d | 2012-09-19 06:22:45 -0700 | [diff] [blame] | 1776 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) |
| 1777 | inode->i_mode = (mode | S_IFDIR); |
Pavel Shilovsky | ff691e9 | 2012-07-13 14:04:46 +0400 | [diff] [blame] | 1778 | |
Jeff Layton | 101b92d | 2012-09-19 06:22:45 -0700 | [diff] [blame] | 1779 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
| 1780 | inode->i_uid = current_fsuid(); |
| 1781 | if (inode->i_mode & S_ISGID) |
| 1782 | inode->i_gid = parent->i_gid; |
| 1783 | else |
| 1784 | inode->i_gid = current_fsgid(); |
Pavel Shilovsky | ff691e9 | 2012-07-13 14:04:46 +0400 | [diff] [blame] | 1785 | } |
| 1786 | } |
Jeff Layton | 101b92d | 2012-09-19 06:22:45 -0700 | [diff] [blame] | 1787 | d_instantiate(dentry, inode); |
Al Viro | 3bcb39b | 2021-02-10 22:13:03 -0500 | [diff] [blame] | 1788 | return 0; |
Pavel Shilovsky | ff691e9 | 2012-07-13 14:04:46 +0400 | [diff] [blame] | 1789 | } |
| 1790 | |
| 1791 | static int |
| 1792 | cifs_posix_mkdir(struct inode *inode, struct dentry *dentry, umode_t mode, |
| 1793 | const char *full_path, struct cifs_sb_info *cifs_sb, |
| 1794 | struct cifs_tcon *tcon, const unsigned int xid) |
| 1795 | { |
| 1796 | int rc = 0; |
| 1797 | u32 oplock = 0; |
| 1798 | FILE_UNIX_BASIC_INFO *info = NULL; |
| 1799 | struct inode *newinode = NULL; |
| 1800 | struct cifs_fattr fattr; |
| 1801 | |
| 1802 | info = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL); |
| 1803 | if (info == NULL) { |
| 1804 | rc = -ENOMEM; |
| 1805 | goto posix_mkdir_out; |
| 1806 | } |
| 1807 | |
| 1808 | mode &= ~current_umask(); |
| 1809 | rc = CIFSPOSIXCreate(xid, tcon, SMB_O_DIRECTORY | SMB_O_CREAT, mode, |
| 1810 | NULL /* netfid */, info, &oplock, full_path, |
Steve French | 2baa268 | 2014-09-27 02:19:01 -0500 | [diff] [blame] | 1811 | cifs_sb->local_nls, cifs_remap(cifs_sb)); |
Pavel Shilovsky | ff691e9 | 2012-07-13 14:04:46 +0400 | [diff] [blame] | 1812 | if (rc == -EOPNOTSUPP) |
| 1813 | goto posix_mkdir_out; |
| 1814 | else if (rc) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1815 | cifs_dbg(FYI, "posix mkdir returned 0x%x\n", rc); |
Pavel Shilovsky | ff691e9 | 2012-07-13 14:04:46 +0400 | [diff] [blame] | 1816 | d_drop(dentry); |
| 1817 | goto posix_mkdir_out; |
| 1818 | } |
| 1819 | |
| 1820 | if (info->Type == cpu_to_le32(-1)) |
| 1821 | /* no return info, go query for it */ |
| 1822 | goto posix_mkdir_get_info; |
| 1823 | /* |
| 1824 | * BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if |
| 1825 | * need to set uid/gid. |
| 1826 | */ |
| 1827 | |
| 1828 | cifs_unix_basic_to_fattr(&fattr, info, cifs_sb); |
| 1829 | cifs_fill_uniqueid(inode->i_sb, &fattr); |
| 1830 | newinode = cifs_iget(inode->i_sb, &fattr); |
| 1831 | if (!newinode) |
| 1832 | goto posix_mkdir_get_info; |
| 1833 | |
| 1834 | d_instantiate(dentry, newinode); |
| 1835 | |
| 1836 | #ifdef CONFIG_CIFS_DEBUG2 |
Al Viro | 35c265e | 2014-08-19 20:25:34 -0400 | [diff] [blame] | 1837 | cifs_dbg(FYI, "instantiated dentry %p %pd to inode %p\n", |
| 1838 | dentry, dentry, newinode); |
Pavel Shilovsky | ff691e9 | 2012-07-13 14:04:46 +0400 | [diff] [blame] | 1839 | |
| 1840 | if (newinode->i_nlink != 2) |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1841 | cifs_dbg(FYI, "unexpected number of links %d\n", |
| 1842 | newinode->i_nlink); |
Pavel Shilovsky | ff691e9 | 2012-07-13 14:04:46 +0400 | [diff] [blame] | 1843 | #endif |
| 1844 | |
| 1845 | posix_mkdir_out: |
| 1846 | kfree(info); |
| 1847 | return rc; |
| 1848 | posix_mkdir_get_info: |
| 1849 | rc = cifs_mkdir_qinfo(inode, dentry, mode, full_path, cifs_sb, tcon, |
| 1850 | xid); |
| 1851 | goto posix_mkdir_out; |
| 1852 | } |
| 1853 | |
Christian Brauner | 549c729 | 2021-01-21 14:19:43 +0100 | [diff] [blame] | 1854 | int cifs_mkdir(struct user_namespace *mnt_userns, struct inode *inode, |
| 1855 | struct dentry *direntry, umode_t mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1856 | { |
Pavel Shilovsky | ff691e9 | 2012-07-13 14:04:46 +0400 | [diff] [blame] | 1857 | int rc = 0; |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 1858 | unsigned int xid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1859 | struct cifs_sb_info *cifs_sb; |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 1860 | struct tcon_link *tlink; |
Pavel Shilovsky | 29e20f9 | 2012-07-13 13:58:14 +0400 | [diff] [blame] | 1861 | struct cifs_tcon *tcon; |
Pavel Shilovsky | f436720 | 2012-03-17 11:41:12 +0300 | [diff] [blame] | 1862 | struct TCP_Server_Info *server; |
Al Viro | 8e33cf2 | 2021-03-18 15:47:35 -0400 | [diff] [blame] | 1863 | const char *full_path; |
Al Viro | f6a9bc3 | 2021-03-05 17:36:04 -0500 | [diff] [blame] | 1864 | void *page; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1865 | |
Frank Sorenson | f52aa79 | 2020-02-12 15:31:48 -0600 | [diff] [blame] | 1866 | cifs_dbg(FYI, "In cifs_mkdir, mode = %04ho inode = 0x%p\n", |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1867 | mode, inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1868 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1869 | cifs_sb = CIFS_SB(inode->i_sb); |
Steve French | 087f757 | 2021-04-29 00:18:43 -0500 | [diff] [blame] | 1870 | if (unlikely(cifs_forced_shutdown(cifs_sb))) |
| 1871 | return -EIO; |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 1872 | tlink = cifs_sb_tlink(cifs_sb); |
| 1873 | if (IS_ERR(tlink)) |
| 1874 | return PTR_ERR(tlink); |
Pavel Shilovsky | 29e20f9 | 2012-07-13 13:58:14 +0400 | [diff] [blame] | 1875 | tcon = tlink_tcon(tlink); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 1876 | |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 1877 | xid = get_xid(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1878 | |
Al Viro | f6a9bc3 | 2021-03-05 17:36:04 -0500 | [diff] [blame] | 1879 | page = alloc_dentry_path(); |
| 1880 | full_path = build_path_from_dentry(direntry, page); |
| 1881 | if (IS_ERR(full_path)) { |
| 1882 | rc = PTR_ERR(full_path); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 1883 | goto mkdir_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1884 | } |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1885 | |
Steve French | bea851b | 2018-06-14 21:56:32 -0500 | [diff] [blame] | 1886 | server = tcon->ses->server; |
| 1887 | |
Steve French | bea851b | 2018-06-14 21:56:32 -0500 | [diff] [blame] | 1888 | if ((server->ops->posix_mkdir) && (tcon->posix_extensions)) { |
| 1889 | rc = server->ops->posix_mkdir(xid, inode, mode, tcon, full_path, |
| 1890 | cifs_sb); |
| 1891 | d_drop(direntry); /* for time being always refresh inode info */ |
| 1892 | goto mkdir_out; |
| 1893 | } |
Steve French | bea851b | 2018-06-14 21:56:32 -0500 | [diff] [blame] | 1894 | |
Pavel Shilovsky | 29e20f9 | 2012-07-13 13:58:14 +0400 | [diff] [blame] | 1895 | if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
| 1896 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { |
Pavel Shilovsky | ff691e9 | 2012-07-13 14:04:46 +0400 | [diff] [blame] | 1897 | rc = cifs_posix_mkdir(inode, direntry, mode, full_path, cifs_sb, |
| 1898 | tcon, xid); |
| 1899 | if (rc != -EOPNOTSUPP) |
Steve French | 2dd29d3 | 2007-04-23 22:07:35 +0000 | [diff] [blame] | 1900 | goto mkdir_out; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1901 | } |
Pavel Shilovsky | ff691e9 | 2012-07-13 14:04:46 +0400 | [diff] [blame] | 1902 | |
Pavel Shilovsky | f436720 | 2012-03-17 11:41:12 +0300 | [diff] [blame] | 1903 | if (!server->ops->mkdir) { |
| 1904 | rc = -ENOSYS; |
| 1905 | goto mkdir_out; |
| 1906 | } |
| 1907 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1908 | /* BB add setting the equivalent of mode via CreateX w/ACLs */ |
Steve French | c3ca78e | 2019-09-25 00:32:13 -0500 | [diff] [blame] | 1909 | rc = server->ops->mkdir(xid, inode, mode, tcon, full_path, cifs_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1910 | if (rc) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1911 | cifs_dbg(FYI, "cifs_mkdir returned 0x%x\n", rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1912 | d_drop(direntry); |
Pavel Shilovsky | ff691e9 | 2012-07-13 14:04:46 +0400 | [diff] [blame] | 1913 | goto mkdir_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1914 | } |
Pavel Shilovsky | ff691e9 | 2012-07-13 14:04:46 +0400 | [diff] [blame] | 1915 | |
Steve French | c3ca78e | 2019-09-25 00:32:13 -0500 | [diff] [blame] | 1916 | /* TODO: skip this for smb2/smb3 */ |
Pavel Shilovsky | ff691e9 | 2012-07-13 14:04:46 +0400 | [diff] [blame] | 1917 | rc = cifs_mkdir_qinfo(inode, direntry, mode, full_path, cifs_sb, tcon, |
| 1918 | xid); |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1919 | mkdir_out: |
Pavel Shilovsky | 6de2ce4 | 2012-02-17 16:13:30 +0300 | [diff] [blame] | 1920 | /* |
| 1921 | * Force revalidate to get parent dir info when needed since cached |
| 1922 | * attributes are invalid now. |
| 1923 | */ |
| 1924 | CIFS_I(inode)->time = 0; |
Al Viro | f6a9bc3 | 2021-03-05 17:36:04 -0500 | [diff] [blame] | 1925 | free_dentry_path(page); |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 1926 | free_xid(xid); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 1927 | cifs_put_tlink(tlink); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1928 | return rc; |
| 1929 | } |
| 1930 | |
| 1931 | int cifs_rmdir(struct inode *inode, struct dentry *direntry) |
| 1932 | { |
| 1933 | int rc = 0; |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 1934 | unsigned int xid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1935 | struct cifs_sb_info *cifs_sb; |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 1936 | struct tcon_link *tlink; |
Pavel Shilovsky | f958ca5 | 2012-07-10 16:14:18 +0400 | [diff] [blame] | 1937 | struct cifs_tcon *tcon; |
| 1938 | struct TCP_Server_Info *server; |
Al Viro | f6a9bc3 | 2021-03-05 17:36:04 -0500 | [diff] [blame] | 1939 | const char *full_path; |
| 1940 | void *page = alloc_dentry_path(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1941 | struct cifsInodeInfo *cifsInode; |
| 1942 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1943 | cifs_dbg(FYI, "cifs_rmdir, inode = 0x%p\n", inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1944 | |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 1945 | xid = get_xid(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1946 | |
Al Viro | f6a9bc3 | 2021-03-05 17:36:04 -0500 | [diff] [blame] | 1947 | full_path = build_path_from_dentry(direntry, page); |
| 1948 | if (IS_ERR(full_path)) { |
| 1949 | rc = PTR_ERR(full_path); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 1950 | goto rmdir_exit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1951 | } |
| 1952 | |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 1953 | cifs_sb = CIFS_SB(inode->i_sb); |
Steve French | 087f757 | 2021-04-29 00:18:43 -0500 | [diff] [blame] | 1954 | if (unlikely(cifs_forced_shutdown(cifs_sb))) { |
| 1955 | rc = -EIO; |
| 1956 | goto rmdir_exit; |
| 1957 | } |
| 1958 | |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 1959 | tlink = cifs_sb_tlink(cifs_sb); |
| 1960 | if (IS_ERR(tlink)) { |
| 1961 | rc = PTR_ERR(tlink); |
| 1962 | goto rmdir_exit; |
| 1963 | } |
Pavel Shilovsky | f958ca5 | 2012-07-10 16:14:18 +0400 | [diff] [blame] | 1964 | tcon = tlink_tcon(tlink); |
| 1965 | server = tcon->ses->server; |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 1966 | |
Pavel Shilovsky | f958ca5 | 2012-07-10 16:14:18 +0400 | [diff] [blame] | 1967 | if (!server->ops->rmdir) { |
| 1968 | rc = -ENOSYS; |
| 1969 | cifs_put_tlink(tlink); |
| 1970 | goto rmdir_exit; |
| 1971 | } |
| 1972 | |
Steve French | 82e9367 | 2020-05-19 03:06:57 -0500 | [diff] [blame] | 1973 | if (tcon->nodelete) { |
| 1974 | rc = -EACCES; |
| 1975 | cifs_put_tlink(tlink); |
| 1976 | goto rmdir_exit; |
| 1977 | } |
| 1978 | |
Pavel Shilovsky | f958ca5 | 2012-07-10 16:14:18 +0400 | [diff] [blame] | 1979 | rc = server->ops->rmdir(xid, tcon, full_path, cifs_sb); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 1980 | cifs_put_tlink(tlink); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1981 | |
| 1982 | if (!rc) { |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 1983 | spin_lock(&d_inode(direntry)->i_lock); |
| 1984 | i_size_write(d_inode(direntry), 0); |
| 1985 | clear_nlink(d_inode(direntry)); |
| 1986 | spin_unlock(&d_inode(direntry)->i_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1987 | } |
| 1988 | |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 1989 | cifsInode = CIFS_I(d_inode(direntry)); |
Pavel Shilovsky | 6de2ce4 | 2012-02-17 16:13:30 +0300 | [diff] [blame] | 1990 | /* force revalidate to go get info when needed */ |
| 1991 | cifsInode->time = 0; |
Steve French | 42c24544 | 2009-01-13 22:03:55 +0000 | [diff] [blame] | 1992 | |
| 1993 | cifsInode = CIFS_I(inode); |
Pavel Shilovsky | 6de2ce4 | 2012-02-17 16:13:30 +0300 | [diff] [blame] | 1994 | /* |
| 1995 | * Force revalidate to get parent dir info when needed since cached |
| 1996 | * attributes are invalid now. |
| 1997 | */ |
| 1998 | cifsInode->time = 0; |
Steve French | 42c24544 | 2009-01-13 22:03:55 +0000 | [diff] [blame] | 1999 | |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 2000 | d_inode(direntry)->i_ctime = inode->i_ctime = inode->i_mtime = |
Deepa Dinamani | e37fea5 | 2017-05-08 15:59:16 -0700 | [diff] [blame] | 2001 | current_time(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2002 | |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 2003 | rmdir_exit: |
Al Viro | f6a9bc3 | 2021-03-05 17:36:04 -0500 | [diff] [blame] | 2004 | free_dentry_path(page); |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 2005 | free_xid(xid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2006 | return rc; |
| 2007 | } |
| 2008 | |
Steve French | ee2fd96 | 2008-09-23 18:23:33 +0000 | [diff] [blame] | 2009 | static int |
Pavel Shilovsky | 8ceb984 | 2012-09-18 16:20:30 -0700 | [diff] [blame] | 2010 | cifs_do_rename(const unsigned int xid, struct dentry *from_dentry, |
| 2011 | const char *from_path, struct dentry *to_dentry, |
| 2012 | const char *to_path) |
Steve French | ee2fd96 | 2008-09-23 18:23:33 +0000 | [diff] [blame] | 2013 | { |
| 2014 | struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 2015 | struct tcon_link *tlink; |
Pavel Shilovsky | 8ceb984 | 2012-09-18 16:20:30 -0700 | [diff] [blame] | 2016 | struct cifs_tcon *tcon; |
| 2017 | struct TCP_Server_Info *server; |
Pavel Shilovsky | d81b8a4 | 2014-01-16 15:53:36 +0400 | [diff] [blame] | 2018 | struct cifs_fid fid; |
| 2019 | struct cifs_open_parms oparms; |
Steve French | ee2fd96 | 2008-09-23 18:23:33 +0000 | [diff] [blame] | 2020 | int oplock, rc; |
| 2021 | |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 2022 | tlink = cifs_sb_tlink(cifs_sb); |
| 2023 | if (IS_ERR(tlink)) |
| 2024 | return PTR_ERR(tlink); |
Pavel Shilovsky | 8ceb984 | 2012-09-18 16:20:30 -0700 | [diff] [blame] | 2025 | tcon = tlink_tcon(tlink); |
| 2026 | server = tcon->ses->server; |
| 2027 | |
| 2028 | if (!server->ops->rename) |
| 2029 | return -ENOSYS; |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 2030 | |
Steve French | ee2fd96 | 2008-09-23 18:23:33 +0000 | [diff] [blame] | 2031 | /* try path-based rename first */ |
Pavel Shilovsky | 8ceb984 | 2012-09-18 16:20:30 -0700 | [diff] [blame] | 2032 | rc = server->ops->rename(xid, tcon, from_path, to_path, cifs_sb); |
Steve French | ee2fd96 | 2008-09-23 18:23:33 +0000 | [diff] [blame] | 2033 | |
| 2034 | /* |
Pavel Shilovsky | 8ceb984 | 2012-09-18 16:20:30 -0700 | [diff] [blame] | 2035 | * Don't bother with rename by filehandle unless file is busy and |
| 2036 | * source. Note that cross directory moves do not work with |
Steve French | ee2fd96 | 2008-09-23 18:23:33 +0000 | [diff] [blame] | 2037 | * rename by filehandle to various Windows servers. |
| 2038 | */ |
Sachin Prabhu | 47c78f4 | 2013-03-11 13:08:49 +0000 | [diff] [blame] | 2039 | if (rc == 0 || rc != -EBUSY) |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 2040 | goto do_rename_exit; |
Steve French | ee2fd96 | 2008-09-23 18:23:33 +0000 | [diff] [blame] | 2041 | |
Frank Sorenson | 652727b | 2019-04-16 08:37:27 -0500 | [diff] [blame] | 2042 | /* Don't fall back to using SMB on SMB 2+ mount */ |
| 2043 | if (server->vals->protocol_id != 0) |
| 2044 | goto do_rename_exit; |
| 2045 | |
Jeff Layton | ed0e3ac | 2010-06-01 16:21:01 -0400 | [diff] [blame] | 2046 | /* open-file renames don't work across directories */ |
| 2047 | if (to_dentry->d_parent != from_dentry->d_parent) |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 2048 | goto do_rename_exit; |
Jeff Layton | ed0e3ac | 2010-06-01 16:21:01 -0400 | [diff] [blame] | 2049 | |
Pavel Shilovsky | d81b8a4 | 2014-01-16 15:53:36 +0400 | [diff] [blame] | 2050 | oparms.tcon = tcon; |
| 2051 | oparms.cifs_sb = cifs_sb; |
Steve French | ee2fd96 | 2008-09-23 18:23:33 +0000 | [diff] [blame] | 2052 | /* open the file to be renamed -- we need DELETE perms */ |
Pavel Shilovsky | d81b8a4 | 2014-01-16 15:53:36 +0400 | [diff] [blame] | 2053 | oparms.desired_access = DELETE; |
Amir Goldstein | 0f06093 | 2020-02-03 21:46:43 +0200 | [diff] [blame] | 2054 | oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR); |
Pavel Shilovsky | d81b8a4 | 2014-01-16 15:53:36 +0400 | [diff] [blame] | 2055 | oparms.disposition = FILE_OPEN; |
| 2056 | oparms.path = from_path; |
| 2057 | oparms.fid = &fid; |
| 2058 | oparms.reconnect = false; |
| 2059 | |
| 2060 | rc = CIFS_open(xid, &oparms, &oplock, NULL); |
Steve French | ee2fd96 | 2008-09-23 18:23:33 +0000 | [diff] [blame] | 2061 | if (rc == 0) { |
Pavel Shilovsky | d81b8a4 | 2014-01-16 15:53:36 +0400 | [diff] [blame] | 2062 | rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, |
Steve French | ee2fd96 | 2008-09-23 18:23:33 +0000 | [diff] [blame] | 2063 | (const char *) to_dentry->d_name.name, |
Steve French | 2baa268 | 2014-09-27 02:19:01 -0500 | [diff] [blame] | 2064 | cifs_sb->local_nls, cifs_remap(cifs_sb)); |
Pavel Shilovsky | d81b8a4 | 2014-01-16 15:53:36 +0400 | [diff] [blame] | 2065 | CIFSSMBClose(xid, tcon, fid.netfid); |
Steve French | ee2fd96 | 2008-09-23 18:23:33 +0000 | [diff] [blame] | 2066 | } |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 2067 | do_rename_exit: |
Steve French | c7e9f78 | 2020-02-25 18:08:54 -0600 | [diff] [blame] | 2068 | if (rc == 0) |
| 2069 | d_move(from_dentry, to_dentry); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 2070 | cifs_put_tlink(tlink); |
Steve French | ee2fd96 | 2008-09-23 18:23:33 +0000 | [diff] [blame] | 2071 | return rc; |
| 2072 | } |
| 2073 | |
Pavel Shilovsky | 8ceb984 | 2012-09-18 16:20:30 -0700 | [diff] [blame] | 2074 | int |
Christian Brauner | 549c729 | 2021-01-21 14:19:43 +0100 | [diff] [blame] | 2075 | cifs_rename2(struct user_namespace *mnt_userns, struct inode *source_dir, |
| 2076 | struct dentry *source_dentry, struct inode *target_dir, |
| 2077 | struct dentry *target_dentry, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2078 | { |
Al Viro | f6a9bc3 | 2021-03-05 17:36:04 -0500 | [diff] [blame] | 2079 | const char *from_name, *to_name; |
| 2080 | void *page1, *page2; |
Jeff Layton | 639e7a9 | 2010-09-03 11:50:09 -0400 | [diff] [blame] | 2081 | struct cifs_sb_info *cifs_sb; |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 2082 | struct tcon_link *tlink; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2083 | struct cifs_tcon *tcon; |
Steve French | ee2fd96 | 2008-09-23 18:23:33 +0000 | [diff] [blame] | 2084 | FILE_UNIX_BASIC_INFO *info_buf_source = NULL; |
| 2085 | FILE_UNIX_BASIC_INFO *info_buf_target; |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 2086 | unsigned int xid; |
| 2087 | int rc, tmprc; |
Rohith Surabattula | 4153570 | 2021-07-29 07:45:29 +0000 | [diff] [blame] | 2088 | int retry_count = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2089 | |
Miklos Szeredi | 7c33d59 | 2014-07-23 15:15:36 +0200 | [diff] [blame] | 2090 | if (flags & ~RENAME_NOREPLACE) |
| 2091 | return -EINVAL; |
| 2092 | |
Jeff Layton | 639e7a9 | 2010-09-03 11:50:09 -0400 | [diff] [blame] | 2093 | cifs_sb = CIFS_SB(source_dir->i_sb); |
Steve French | 087f757 | 2021-04-29 00:18:43 -0500 | [diff] [blame] | 2094 | if (unlikely(cifs_forced_shutdown(cifs_sb))) |
| 2095 | return -EIO; |
| 2096 | |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 2097 | tlink = cifs_sb_tlink(cifs_sb); |
| 2098 | if (IS_ERR(tlink)) |
| 2099 | return PTR_ERR(tlink); |
| 2100 | tcon = tlink_tcon(tlink); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2101 | |
Al Viro | f6a9bc3 | 2021-03-05 17:36:04 -0500 | [diff] [blame] | 2102 | page1 = alloc_dentry_path(); |
| 2103 | page2 = alloc_dentry_path(); |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 2104 | xid = get_xid(); |
Steve French | ee2fd96 | 2008-09-23 18:23:33 +0000 | [diff] [blame] | 2105 | |
Al Viro | f6a9bc3 | 2021-03-05 17:36:04 -0500 | [diff] [blame] | 2106 | from_name = build_path_from_dentry(source_dentry, page1); |
| 2107 | if (IS_ERR(from_name)) { |
| 2108 | rc = PTR_ERR(from_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2109 | goto cifs_rename_exit; |
| 2110 | } |
| 2111 | |
Al Viro | f6a9bc3 | 2021-03-05 17:36:04 -0500 | [diff] [blame] | 2112 | to_name = build_path_from_dentry(target_dentry, page2); |
| 2113 | if (IS_ERR(to_name)) { |
| 2114 | rc = PTR_ERR(to_name); |
Steve French | ee2fd96 | 2008-09-23 18:23:33 +0000 | [diff] [blame] | 2115 | goto cifs_rename_exit; |
| 2116 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2117 | |
Rohith Surabattula | e3fc065 | 2021-09-17 18:14:26 +0000 | [diff] [blame] | 2118 | cifs_close_deferred_file_under_dentry(tcon, from_name); |
Rohith Surabattula | 4153570 | 2021-07-29 07:45:29 +0000 | [diff] [blame] | 2119 | if (d_inode(target_dentry) != NULL) |
Rohith Surabattula | e3fc065 | 2021-09-17 18:14:26 +0000 | [diff] [blame] | 2120 | cifs_close_deferred_file_under_dentry(tcon, to_name); |
Rohith Surabattula | 4153570 | 2021-07-29 07:45:29 +0000 | [diff] [blame] | 2121 | |
Pavel Shilovsky | 8ceb984 | 2012-09-18 16:20:30 -0700 | [diff] [blame] | 2122 | rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry, |
| 2123 | to_name); |
Steve French | ee2fd96 | 2008-09-23 18:23:33 +0000 | [diff] [blame] | 2124 | |
Rohith Surabattula | 4153570 | 2021-07-29 07:45:29 +0000 | [diff] [blame] | 2125 | if (rc == -EACCES) { |
| 2126 | while (retry_count < 3) { |
| 2127 | cifs_close_all_deferred_files(tcon); |
| 2128 | rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry, |
| 2129 | to_name); |
| 2130 | if (rc != -EACCES) |
| 2131 | break; |
| 2132 | retry_count++; |
| 2133 | } |
| 2134 | } |
| 2135 | |
Miklos Szeredi | 7c33d59 | 2014-07-23 15:15:36 +0200 | [diff] [blame] | 2136 | /* |
| 2137 | * No-replace is the natural behavior for CIFS, so skip unlink hacks. |
| 2138 | */ |
| 2139 | if (flags & RENAME_NOREPLACE) |
| 2140 | goto cifs_rename_exit; |
| 2141 | |
Jeff Layton | 14121bd | 2008-10-20 14:45:22 -0400 | [diff] [blame] | 2142 | if (rc == -EEXIST && tcon->unix_ext) { |
Steve French | ee2fd96 | 2008-09-23 18:23:33 +0000 | [diff] [blame] | 2143 | /* |
Pavel Shilovsky | 8ceb984 | 2012-09-18 16:20:30 -0700 | [diff] [blame] | 2144 | * Are src and dst hardlinks of same inode? We can only tell |
| 2145 | * with unix extensions enabled. |
Steve French | ee2fd96 | 2008-09-23 18:23:33 +0000 | [diff] [blame] | 2146 | */ |
Jeff Layton | 14121bd | 2008-10-20 14:45:22 -0400 | [diff] [blame] | 2147 | info_buf_source = |
Kees Cook | 6da2ec5 | 2018-06-12 13:55:00 -0700 | [diff] [blame] | 2148 | kmalloc_array(2, sizeof(FILE_UNIX_BASIC_INFO), |
Jeff Layton | 14121bd | 2008-10-20 14:45:22 -0400 | [diff] [blame] | 2149 | GFP_KERNEL); |
| 2150 | if (info_buf_source == NULL) { |
| 2151 | rc = -ENOMEM; |
| 2152 | goto cifs_rename_exit; |
| 2153 | } |
| 2154 | |
| 2155 | info_buf_target = info_buf_source + 1; |
Pavel Shilovsky | 8ceb984 | 2012-09-18 16:20:30 -0700 | [diff] [blame] | 2156 | tmprc = CIFSSMBUnixQPathInfo(xid, tcon, from_name, |
| 2157 | info_buf_source, |
| 2158 | cifs_sb->local_nls, |
Steve French | 2baa268 | 2014-09-27 02:19:01 -0500 | [diff] [blame] | 2159 | cifs_remap(cifs_sb)); |
Jeff Layton | 8d281ef | 2008-10-22 13:57:01 -0400 | [diff] [blame] | 2160 | if (tmprc != 0) |
Jeff Layton | 14121bd | 2008-10-20 14:45:22 -0400 | [diff] [blame] | 2161 | goto unlink_target; |
| 2162 | |
Pavel Shilovsky | 8ceb984 | 2012-09-18 16:20:30 -0700 | [diff] [blame] | 2163 | tmprc = CIFSSMBUnixQPathInfo(xid, tcon, to_name, |
| 2164 | info_buf_target, |
| 2165 | cifs_sb->local_nls, |
Steve French | 2baa268 | 2014-09-27 02:19:01 -0500 | [diff] [blame] | 2166 | cifs_remap(cifs_sb)); |
Jeff Layton | 14121bd | 2008-10-20 14:45:22 -0400 | [diff] [blame] | 2167 | |
Jeff Layton | 8d281ef | 2008-10-22 13:57:01 -0400 | [diff] [blame] | 2168 | if (tmprc == 0 && (info_buf_source->UniqueId == |
Jeff Layton | ae6884a | 2008-11-03 14:05:08 -0500 | [diff] [blame] | 2169 | info_buf_target->UniqueId)) { |
Jeff Layton | 14121bd | 2008-10-20 14:45:22 -0400 | [diff] [blame] | 2170 | /* same file, POSIX says that this is a noop */ |
Jeff Layton | ae6884a | 2008-11-03 14:05:08 -0500 | [diff] [blame] | 2171 | rc = 0; |
Jeff Layton | 14121bd | 2008-10-20 14:45:22 -0400 | [diff] [blame] | 2172 | goto cifs_rename_exit; |
Jeff Layton | ae6884a | 2008-11-03 14:05:08 -0500 | [diff] [blame] | 2173 | } |
Pavel Shilovsky | 8ceb984 | 2012-09-18 16:20:30 -0700 | [diff] [blame] | 2174 | } |
| 2175 | /* |
| 2176 | * else ... BB we could add the same check for Windows by |
| 2177 | * checking the UniqueId via FILE_INTERNAL_INFO |
| 2178 | */ |
Jeff Layton | 14121bd | 2008-10-20 14:45:22 -0400 | [diff] [blame] | 2179 | |
Jeff Layton | 14121bd | 2008-10-20 14:45:22 -0400 | [diff] [blame] | 2180 | unlink_target: |
Steve French | 0e67051 | 2020-07-23 14:41:29 -0500 | [diff] [blame] | 2181 | /* Try unlinking the target dentry if it's not negative */ |
| 2182 | if (d_really_is_positive(target_dentry) && (rc == -EACCES || rc == -EEXIST)) { |
Pavel Shilovsky | a07d322 | 2014-08-22 13:32:09 +0400 | [diff] [blame] | 2183 | if (d_is_dir(target_dentry)) |
| 2184 | tmprc = cifs_rmdir(target_dir, target_dentry); |
| 2185 | else |
| 2186 | tmprc = cifs_unlink(target_dir, target_dentry); |
Jeff Layton | 14121bd | 2008-10-20 14:45:22 -0400 | [diff] [blame] | 2187 | if (tmprc) |
| 2188 | goto cifs_rename_exit; |
Pavel Shilovsky | 8ceb984 | 2012-09-18 16:20:30 -0700 | [diff] [blame] | 2189 | rc = cifs_do_rename(xid, source_dentry, from_name, |
| 2190 | target_dentry, to_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2191 | } |
| 2192 | |
Pavel Shilovsky | b46799a | 2014-08-18 20:49:58 +0400 | [diff] [blame] | 2193 | /* force revalidate to go get info when needed */ |
| 2194 | CIFS_I(source_dir)->time = CIFS_I(target_dir)->time = 0; |
| 2195 | |
| 2196 | source_dir->i_ctime = source_dir->i_mtime = target_dir->i_ctime = |
Deepa Dinamani | e37fea5 | 2017-05-08 15:59:16 -0700 | [diff] [blame] | 2197 | target_dir->i_mtime = current_time(source_dir); |
Pavel Shilovsky | b46799a | 2014-08-18 20:49:58 +0400 | [diff] [blame] | 2198 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2199 | cifs_rename_exit: |
Steve French | ee2fd96 | 2008-09-23 18:23:33 +0000 | [diff] [blame] | 2200 | kfree(info_buf_source); |
Al Viro | f6a9bc3 | 2021-03-05 17:36:04 -0500 | [diff] [blame] | 2201 | free_dentry_path(page2); |
| 2202 | free_dentry_path(page1); |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 2203 | free_xid(xid); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 2204 | cifs_put_tlink(tlink); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2205 | return rc; |
| 2206 | } |
| 2207 | |
Jeff Layton | df2cf17 | 2010-02-12 07:44:16 -0500 | [diff] [blame] | 2208 | static bool |
Ronnie Sahlberg | ed8561f | 2021-03-09 09:07:34 +1000 | [diff] [blame] | 2209 | cifs_dentry_needs_reval(struct dentry *dentry) |
Jeff Layton | df2cf17 | 2010-02-12 07:44:16 -0500 | [diff] [blame] | 2210 | { |
Ronnie Sahlberg | ed8561f | 2021-03-09 09:07:34 +1000 | [diff] [blame] | 2211 | struct inode *inode = d_inode(dentry); |
Jeff Layton | df2cf17 | 2010-02-12 07:44:16 -0500 | [diff] [blame] | 2212 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
Suresh Jayaraman | 6d20e84 | 2010-12-01 14:42:28 +0530 | [diff] [blame] | 2213 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
Ronnie Sahlberg | f6d2353 | 2021-03-09 09:07:35 +1000 | [diff] [blame] | 2214 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
| 2215 | struct cached_fid *cfid = NULL; |
Jeff Layton | df2cf17 | 2010-02-12 07:44:16 -0500 | [diff] [blame] | 2216 | |
Ronnie Sahlberg | 57c55cd | 2018-05-24 06:54:27 +1000 | [diff] [blame] | 2217 | if (cifs_i->time == 0) |
| 2218 | return true; |
| 2219 | |
Pavel Shilovsky | 18cceb6 | 2013-09-05 13:01:06 +0400 | [diff] [blame] | 2220 | if (CIFS_CACHE_READ(cifs_i)) |
Jeff Layton | df2cf17 | 2010-02-12 07:44:16 -0500 | [diff] [blame] | 2221 | return false; |
| 2222 | |
| 2223 | if (!lookupCacheEnabled) |
| 2224 | return true; |
| 2225 | |
Ronnie Sahlberg | f6d2353 | 2021-03-09 09:07:35 +1000 | [diff] [blame] | 2226 | if (!open_cached_dir_by_dentry(tcon, dentry->d_parent, &cfid)) { |
| 2227 | mutex_lock(&cfid->fid_mutex); |
| 2228 | if (cfid->time && cifs_i->time > cfid->time) { |
| 2229 | mutex_unlock(&cfid->fid_mutex); |
| 2230 | close_cached_dir(cfid); |
| 2231 | return false; |
| 2232 | } |
| 2233 | mutex_unlock(&cfid->fid_mutex); |
| 2234 | close_cached_dir(cfid); |
| 2235 | } |
Steve French | ddaf6d4 | 2021-02-23 16:16:09 -0600 | [diff] [blame] | 2236 | /* |
| 2237 | * depending on inode type, check if attribute caching disabled for |
| 2238 | * files or directories |
| 2239 | */ |
| 2240 | if (S_ISDIR(inode->i_mode)) { |
| 2241 | if (!cifs_sb->ctx->acdirmax) |
| 2242 | return true; |
| 2243 | if (!time_in_range(jiffies, cifs_i->time, |
| 2244 | cifs_i->time + cifs_sb->ctx->acdirmax)) |
| 2245 | return true; |
| 2246 | } else { /* file */ |
Steve French | 5780464 | 2021-02-24 12:12:53 -0600 | [diff] [blame] | 2247 | if (!cifs_sb->ctx->acregmax) |
Steve French | ddaf6d4 | 2021-02-23 16:16:09 -0600 | [diff] [blame] | 2248 | return true; |
| 2249 | if (!time_in_range(jiffies, cifs_i->time, |
Steve French | 5780464 | 2021-02-24 12:12:53 -0600 | [diff] [blame] | 2250 | cifs_i->time + cifs_sb->ctx->acregmax)) |
Steve French | ddaf6d4 | 2021-02-23 16:16:09 -0600 | [diff] [blame] | 2251 | return true; |
| 2252 | } |
Jeff Layton | df2cf17 | 2010-02-12 07:44:16 -0500 | [diff] [blame] | 2253 | |
Jeff Layton | db19272 | 2010-05-17 14:51:49 -0400 | [diff] [blame] | 2254 | /* hardlinked files w/ noserverino get "special" treatment */ |
Suresh Jayaraman | 6d20e84 | 2010-12-01 14:42:28 +0530 | [diff] [blame] | 2255 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) && |
Jeff Layton | db19272 | 2010-05-17 14:51:49 -0400 | [diff] [blame] | 2256 | S_ISREG(inode->i_mode) && inode->i_nlink != 1) |
| 2257 | return true; |
| 2258 | |
Jeff Layton | df2cf17 | 2010-02-12 07:44:16 -0500 | [diff] [blame] | 2259 | return false; |
| 2260 | } |
| 2261 | |
Suresh Jayaraman | 523fb8c | 2010-11-29 22:39:47 +0530 | [diff] [blame] | 2262 | /* |
| 2263 | * Zap the cache. Called when invalid_mapping flag is set. |
| 2264 | */ |
Pavel Shilovsky | 6feb989 | 2011-04-07 18:18:11 +0400 | [diff] [blame] | 2265 | int |
Jeff Layton | df2cf17 | 2010-02-12 07:44:16 -0500 | [diff] [blame] | 2266 | cifs_invalidate_mapping(struct inode *inode) |
| 2267 | { |
Pavel Shilovsky | 6feb989 | 2011-04-07 18:18:11 +0400 | [diff] [blame] | 2268 | int rc = 0; |
Jeff Layton | df2cf17 | 2010-02-12 07:44:16 -0500 | [diff] [blame] | 2269 | |
Jeff Layton | df2cf17 | 2010-02-12 07:44:16 -0500 | [diff] [blame] | 2270 | if (inode->i_mapping && inode->i_mapping->nrpages != 0) { |
Pavel Shilovsky | 257fb1f | 2011-03-16 01:55:32 +0300 | [diff] [blame] | 2271 | rc = invalidate_inode_pages2(inode->i_mapping); |
Jeff Layton | 4f73c7d | 2014-04-30 09:31:47 -0400 | [diff] [blame] | 2272 | if (rc) |
Joe Perches | a0a3036 | 2020-04-14 22:42:53 -0700 | [diff] [blame] | 2273 | cifs_dbg(VFS, "%s: Could not invalidate inode %p\n", |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2274 | __func__, inode); |
Jeff Layton | df2cf17 | 2010-02-12 07:44:16 -0500 | [diff] [blame] | 2275 | } |
Pavel Shilovsky | 257fb1f | 2011-03-16 01:55:32 +0300 | [diff] [blame] | 2276 | |
Pavel Shilovsky | 6feb989 | 2011-04-07 18:18:11 +0400 | [diff] [blame] | 2277 | return rc; |
Jeff Layton | df2cf17 | 2010-02-12 07:44:16 -0500 | [diff] [blame] | 2278 | } |
| 2279 | |
Jeff Layton | 4f73c7d | 2014-04-30 09:31:47 -0400 | [diff] [blame] | 2280 | /** |
| 2281 | * cifs_wait_bit_killable - helper for functions that are sleeping on bit locks |
Steve French | 607dfc7 | 2020-12-12 12:08:58 -0600 | [diff] [blame] | 2282 | * |
| 2283 | * @key: currently unused |
| 2284 | * @mode: the task state to sleep in |
Jeff Layton | 4f73c7d | 2014-04-30 09:31:47 -0400 | [diff] [blame] | 2285 | */ |
| 2286 | static int |
Peter Zijlstra | dfd01f0 | 2015-12-13 22:11:16 +0100 | [diff] [blame] | 2287 | cifs_wait_bit_killable(struct wait_bit_key *key, int mode) |
Jeff Layton | 4f73c7d | 2014-04-30 09:31:47 -0400 | [diff] [blame] | 2288 | { |
Jeff Layton | 4f73c7d | 2014-04-30 09:31:47 -0400 | [diff] [blame] | 2289 | freezable_schedule_unsafe(); |
Peter Zijlstra | dfd01f0 | 2015-12-13 22:11:16 +0100 | [diff] [blame] | 2290 | if (signal_pending_state(mode, current)) |
| 2291 | return -ERESTARTSYS; |
Jeff Layton | 4f73c7d | 2014-04-30 09:31:47 -0400 | [diff] [blame] | 2292 | return 0; |
| 2293 | } |
| 2294 | |
Jeff Layton | e284e53 | 2014-04-30 09:31:46 -0400 | [diff] [blame] | 2295 | int |
| 2296 | cifs_revalidate_mapping(struct inode *inode) |
| 2297 | { |
Jeff Layton | 4f73c7d | 2014-04-30 09:31:47 -0400 | [diff] [blame] | 2298 | int rc; |
| 2299 | unsigned long *flags = &CIFS_I(inode)->flags; |
Shyam Prasad N | 18d0406 | 2021-08-10 10:22:28 +0000 | [diff] [blame] | 2300 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
Jeff Layton | 4f73c7d | 2014-04-30 09:31:47 -0400 | [diff] [blame] | 2301 | |
Steve French | 4e8aea3 | 2020-04-09 21:42:18 -0500 | [diff] [blame] | 2302 | /* swapfiles are not supposed to be shared */ |
| 2303 | if (IS_SWAPFILE(inode)) |
| 2304 | return 0; |
| 2305 | |
NeilBrown | 7431620 | 2014-07-07 15:16:04 +1000 | [diff] [blame] | 2306 | rc = wait_on_bit_lock_action(flags, CIFS_INO_LOCK, cifs_wait_bit_killable, |
| 2307 | TASK_KILLABLE); |
Jeff Layton | 4f73c7d | 2014-04-30 09:31:47 -0400 | [diff] [blame] | 2308 | if (rc) |
| 2309 | return rc; |
| 2310 | |
| 2311 | if (test_and_clear_bit(CIFS_INO_INVALID_MAPPING, flags)) { |
Shyam Prasad N | 18d0406 | 2021-08-10 10:22:28 +0000 | [diff] [blame] | 2312 | /* for cache=singleclient, do not invalidate */ |
| 2313 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RW_CACHE) |
| 2314 | goto skip_invalidate; |
| 2315 | |
Jeff Layton | 4f73c7d | 2014-04-30 09:31:47 -0400 | [diff] [blame] | 2316 | rc = cifs_invalidate_mapping(inode); |
| 2317 | if (rc) |
| 2318 | set_bit(CIFS_INO_INVALID_MAPPING, flags); |
| 2319 | } |
| 2320 | |
Shyam Prasad N | 18d0406 | 2021-08-10 10:22:28 +0000 | [diff] [blame] | 2321 | skip_invalidate: |
Jeff Layton | 4f73c7d | 2014-04-30 09:31:47 -0400 | [diff] [blame] | 2322 | clear_bit_unlock(CIFS_INO_LOCK, flags); |
Linus Torvalds | b1cce80 | 2014-06-09 19:08:43 -0700 | [diff] [blame] | 2323 | smp_mb__after_atomic(); |
Jeff Layton | 4f73c7d | 2014-04-30 09:31:47 -0400 | [diff] [blame] | 2324 | wake_up_bit(flags, CIFS_INO_LOCK); |
| 2325 | |
| 2326 | return rc; |
| 2327 | } |
| 2328 | |
| 2329 | int |
| 2330 | cifs_zap_mapping(struct inode *inode) |
| 2331 | { |
| 2332 | set_bit(CIFS_INO_INVALID_MAPPING, &CIFS_I(inode)->flags); |
| 2333 | return cifs_revalidate_mapping(inode); |
Jeff Layton | e284e53 | 2014-04-30 09:31:46 -0400 | [diff] [blame] | 2334 | } |
| 2335 | |
Pavel Shilovsky | 6feb989 | 2011-04-07 18:18:11 +0400 | [diff] [blame] | 2336 | int cifs_revalidate_file_attr(struct file *filp) |
Jeff Layton | abab095 | 2010-02-12 07:44:18 -0500 | [diff] [blame] | 2337 | { |
| 2338 | int rc = 0; |
Ronnie Sahlberg | ed8561f | 2021-03-09 09:07:34 +1000 | [diff] [blame] | 2339 | struct dentry *dentry = file_dentry(filp); |
Jeff Layton | ba00ba64 | 2010-09-20 16:01:31 -0700 | [diff] [blame] | 2340 | struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data; |
Jeff Layton | abab095 | 2010-02-12 07:44:18 -0500 | [diff] [blame] | 2341 | |
Ronnie Sahlberg | ed8561f | 2021-03-09 09:07:34 +1000 | [diff] [blame] | 2342 | if (!cifs_dentry_needs_reval(dentry)) |
Pavel Shilovsky | 6feb989 | 2011-04-07 18:18:11 +0400 | [diff] [blame] | 2343 | return rc; |
Jeff Layton | abab095 | 2010-02-12 07:44:18 -0500 | [diff] [blame] | 2344 | |
Jeff Layton | 13cfb73 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 2345 | if (tlink_tcon(cfile->tlink)->unix_ext) |
Jeff Layton | abab095 | 2010-02-12 07:44:18 -0500 | [diff] [blame] | 2346 | rc = cifs_get_file_info_unix(filp); |
| 2347 | else |
| 2348 | rc = cifs_get_file_info(filp); |
| 2349 | |
Jeff Layton | abab095 | 2010-02-12 07:44:18 -0500 | [diff] [blame] | 2350 | return rc; |
| 2351 | } |
| 2352 | |
Pavel Shilovsky | 6feb989 | 2011-04-07 18:18:11 +0400 | [diff] [blame] | 2353 | int cifs_revalidate_dentry_attr(struct dentry *dentry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2354 | { |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 2355 | unsigned int xid; |
Jeff Layton | df2cf17 | 2010-02-12 07:44:16 -0500 | [diff] [blame] | 2356 | int rc = 0; |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 2357 | struct inode *inode = d_inode(dentry); |
Jeff Layton | df2cf17 | 2010-02-12 07:44:16 -0500 | [diff] [blame] | 2358 | struct super_block *sb = dentry->d_sb; |
Al Viro | f6a9bc3 | 2021-03-05 17:36:04 -0500 | [diff] [blame] | 2359 | const char *full_path; |
| 2360 | void *page; |
Ronnie Sahlberg | fc513fa | 2020-02-19 06:01:03 +1000 | [diff] [blame] | 2361 | int count = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2362 | |
Jeff Layton | df2cf17 | 2010-02-12 07:44:16 -0500 | [diff] [blame] | 2363 | if (inode == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2364 | return -ENOENT; |
| 2365 | |
Ronnie Sahlberg | ed8561f | 2021-03-09 09:07:34 +1000 | [diff] [blame] | 2366 | if (!cifs_dentry_needs_reval(dentry)) |
Pavel Shilovsky | 6feb989 | 2011-04-07 18:18:11 +0400 | [diff] [blame] | 2367 | return rc; |
| 2368 | |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 2369 | xid = get_xid(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2370 | |
Al Viro | f6a9bc3 | 2021-03-05 17:36:04 -0500 | [diff] [blame] | 2371 | page = alloc_dentry_path(); |
| 2372 | full_path = build_path_from_dentry(dentry, page); |
| 2373 | if (IS_ERR(full_path)) { |
| 2374 | rc = PTR_ERR(full_path); |
Pavel Shilovsky | 6feb989 | 2011-04-07 18:18:11 +0400 | [diff] [blame] | 2375 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2376 | } |
Jeff Layton | df2cf17 | 2010-02-12 07:44:16 -0500 | [diff] [blame] | 2377 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2378 | cifs_dbg(FYI, "Update attributes: %s inode 0x%p count %d dentry: 0x%p d_time %ld jiffies %ld\n", |
| 2379 | full_path, inode, inode->i_count.counter, |
Miklos Szeredi | a00be0e | 2016-09-16 12:44:21 +0200 | [diff] [blame] | 2380 | dentry, cifs_get_time(dentry), jiffies); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2381 | |
Ronnie Sahlberg | fc513fa | 2020-02-19 06:01:03 +1000 | [diff] [blame] | 2382 | again: |
Steve French | 6a5f659 | 2020-06-11 19:25:47 -0500 | [diff] [blame] | 2383 | if (cifs_sb_master_tcon(CIFS_SB(sb))->posix_extensions) |
| 2384 | rc = smb311_posix_get_inode_info(&inode, full_path, sb, xid); |
| 2385 | else if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext) |
Jeff Layton | df2cf17 | 2010-02-12 07:44:16 -0500 | [diff] [blame] | 2386 | rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid); |
| 2387 | else |
| 2388 | rc = cifs_get_inode_info(&inode, full_path, NULL, sb, |
| 2389 | xid, NULL); |
Ronnie Sahlberg | fc513fa | 2020-02-19 06:01:03 +1000 | [diff] [blame] | 2390 | if (rc == -EAGAIN && count++ < 10) |
| 2391 | goto again; |
Pavel Shilovsky | 6feb989 | 2011-04-07 18:18:11 +0400 | [diff] [blame] | 2392 | out: |
Al Viro | f6a9bc3 | 2021-03-05 17:36:04 -0500 | [diff] [blame] | 2393 | free_dentry_path(page); |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 2394 | free_xid(xid); |
Ronnie Sahlberg | fc513fa | 2020-02-19 06:01:03 +1000 | [diff] [blame] | 2395 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2396 | return rc; |
| 2397 | } |
| 2398 | |
Pavel Shilovsky | 6feb989 | 2011-04-07 18:18:11 +0400 | [diff] [blame] | 2399 | int cifs_revalidate_file(struct file *filp) |
| 2400 | { |
| 2401 | int rc; |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 2402 | struct inode *inode = file_inode(filp); |
Pavel Shilovsky | 6feb989 | 2011-04-07 18:18:11 +0400 | [diff] [blame] | 2403 | |
| 2404 | rc = cifs_revalidate_file_attr(filp); |
| 2405 | if (rc) |
| 2406 | return rc; |
| 2407 | |
Jeff Layton | e284e53 | 2014-04-30 09:31:46 -0400 | [diff] [blame] | 2408 | return cifs_revalidate_mapping(inode); |
Pavel Shilovsky | 6feb989 | 2011-04-07 18:18:11 +0400 | [diff] [blame] | 2409 | } |
| 2410 | |
| 2411 | /* revalidate a dentry's inode attributes */ |
| 2412 | int cifs_revalidate_dentry(struct dentry *dentry) |
| 2413 | { |
| 2414 | int rc; |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 2415 | struct inode *inode = d_inode(dentry); |
Pavel Shilovsky | 6feb989 | 2011-04-07 18:18:11 +0400 | [diff] [blame] | 2416 | |
| 2417 | rc = cifs_revalidate_dentry_attr(dentry); |
| 2418 | if (rc) |
| 2419 | return rc; |
| 2420 | |
Jeff Layton | e284e53 | 2014-04-30 09:31:46 -0400 | [diff] [blame] | 2421 | return cifs_revalidate_mapping(inode); |
Pavel Shilovsky | 6feb989 | 2011-04-07 18:18:11 +0400 | [diff] [blame] | 2422 | } |
| 2423 | |
Christian Brauner | 549c729 | 2021-01-21 14:19:43 +0100 | [diff] [blame] | 2424 | int cifs_getattr(struct user_namespace *mnt_userns, const struct path *path, |
| 2425 | struct kstat *stat, u32 request_mask, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2426 | { |
David Howells | a528d35 | 2017-01-31 16:46:22 +0000 | [diff] [blame] | 2427 | struct dentry *dentry = path->dentry; |
Jeff Layton | 3aa1c8c | 2010-10-07 14:46:28 -0400 | [diff] [blame] | 2428 | struct cifs_sb_info *cifs_sb = CIFS_SB(dentry->d_sb); |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2429 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 2430 | struct inode *inode = d_inode(dentry); |
Pavel Shilovsky | 6feb989 | 2011-04-07 18:18:11 +0400 | [diff] [blame] | 2431 | int rc; |
Jeff Layton | 3aa1c8c | 2010-10-07 14:46:28 -0400 | [diff] [blame] | 2432 | |
Steve French | 087f757 | 2021-04-29 00:18:43 -0500 | [diff] [blame] | 2433 | if (unlikely(cifs_forced_shutdown(CIFS_SB(inode->i_sb)))) |
| 2434 | return -EIO; |
| 2435 | |
Pavel Shilovsky | 6feb989 | 2011-04-07 18:18:11 +0400 | [diff] [blame] | 2436 | /* |
| 2437 | * We need to be sure that all dirty pages are written and the server |
| 2438 | * has actual ctime, mtime and file length. |
| 2439 | */ |
Steve French | 65af8f0 | 2021-03-19 00:05:48 -0500 | [diff] [blame] | 2440 | if ((request_mask & (STATX_CTIME | STATX_MTIME | STATX_SIZE | STATX_BLOCKS)) && |
Steve French | ffdec8d | 2020-02-18 18:07:57 -0600 | [diff] [blame] | 2441 | !CIFS_CACHE_READ(CIFS_I(inode)) && |
| 2442 | inode->i_mapping && inode->i_mapping->nrpages != 0) { |
Pavel Shilovsky | 6feb989 | 2011-04-07 18:18:11 +0400 | [diff] [blame] | 2443 | rc = filemap_fdatawait(inode->i_mapping); |
Steve French | 156ecb2 | 2011-05-20 17:00:01 +0000 | [diff] [blame] | 2444 | if (rc) { |
| 2445 | mapping_set_error(inode->i_mapping, rc); |
| 2446 | return rc; |
| 2447 | } |
Steve French | 5fe14c8 | 2006-11-07 19:26:33 +0000 | [diff] [blame] | 2448 | } |
Pavel Shilovsky | 6feb989 | 2011-04-07 18:18:11 +0400 | [diff] [blame] | 2449 | |
Steve French | ffdec8d | 2020-02-18 18:07:57 -0600 | [diff] [blame] | 2450 | if ((flags & AT_STATX_SYNC_TYPE) == AT_STATX_FORCE_SYNC) |
| 2451 | CIFS_I(inode)->time = 0; /* force revalidate */ |
| 2452 | |
| 2453 | /* |
| 2454 | * If the caller doesn't require syncing, only sync if |
| 2455 | * necessary (e.g. due to earlier truncate or setattr |
| 2456 | * invalidating the cached metadata) |
| 2457 | */ |
| 2458 | if (((flags & AT_STATX_SYNC_TYPE) != AT_STATX_DONT_SYNC) || |
| 2459 | (CIFS_I(inode)->time == 0)) { |
| 2460 | rc = cifs_revalidate_dentry_attr(dentry); |
| 2461 | if (rc) |
| 2462 | return rc; |
| 2463 | } |
Pavel Shilovsky | 6feb989 | 2011-04-07 18:18:11 +0400 | [diff] [blame] | 2464 | |
Christian Brauner | 0d56a45 | 2021-01-21 14:19:30 +0100 | [diff] [blame] | 2465 | generic_fillattr(&init_user_ns, inode, stat); |
Ronnie Sahlberg | 522aa3b | 2020-12-14 16:40:17 +1000 | [diff] [blame] | 2466 | stat->blksize = cifs_sb->ctx->bsize; |
Pavel Shilovsky | 6feb989 | 2011-04-07 18:18:11 +0400 | [diff] [blame] | 2467 | stat->ino = CIFS_I(inode)->uniqueid; |
| 2468 | |
Steve French | 6e70e26 | 2017-09-21 21:32:29 -0500 | [diff] [blame] | 2469 | /* old CIFS Unix Extensions doesn't return create time */ |
| 2470 | if (CIFS_I(inode)->createtime) { |
| 2471 | stat->result_mask |= STATX_BTIME; |
Arnd Bergmann | 9539020 | 2018-06-19 17:27:58 +0200 | [diff] [blame] | 2472 | stat->btime = |
| 2473 | cifs_NTtimeToUnix(cpu_to_le64(CIFS_I(inode)->createtime)); |
Steve French | 6e70e26 | 2017-09-21 21:32:29 -0500 | [diff] [blame] | 2474 | } |
| 2475 | |
| 2476 | stat->attributes_mask |= (STATX_ATTR_COMPRESSED | STATX_ATTR_ENCRYPTED); |
| 2477 | if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_COMPRESSED) |
| 2478 | stat->attributes |= STATX_ATTR_COMPRESSED; |
| 2479 | if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_ENCRYPTED) |
| 2480 | stat->attributes |= STATX_ATTR_ENCRYPTED; |
| 2481 | |
Pavel Shilovsky | 6feb989 | 2011-04-07 18:18:11 +0400 | [diff] [blame] | 2482 | /* |
Jeff Layton | d3d1fce | 2012-11-25 08:00:40 -0500 | [diff] [blame] | 2483 | * If on a multiuser mount without unix extensions or cifsacl being |
| 2484 | * enabled, and the admin hasn't overridden them, set the ownership |
| 2485 | * to the fsuid/fsgid of the current process. |
Pavel Shilovsky | 6feb989 | 2011-04-07 18:18:11 +0400 | [diff] [blame] | 2486 | */ |
| 2487 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) && |
Jeff Layton | d3d1fce | 2012-11-25 08:00:40 -0500 | [diff] [blame] | 2488 | !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) && |
Pavel Shilovsky | 6feb989 | 2011-04-07 18:18:11 +0400 | [diff] [blame] | 2489 | !tcon->unix_ext) { |
| 2490 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)) |
| 2491 | stat->uid = current_fsuid(); |
| 2492 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)) |
| 2493 | stat->gid = current_fsgid(); |
| 2494 | } |
Dan Carpenter | 3994688 | 2020-02-28 12:22:59 +0300 | [diff] [blame] | 2495 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2496 | } |
| 2497 | |
Ronnie Sahlberg | 2f3ebab | 2019-04-25 16:45:29 +1000 | [diff] [blame] | 2498 | int cifs_fiemap(struct inode *inode, struct fiemap_extent_info *fei, u64 start, |
| 2499 | u64 len) |
| 2500 | { |
| 2501 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
| 2502 | struct cifs_sb_info *cifs_sb = CIFS_SB(cifs_i->vfs_inode.i_sb); |
| 2503 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
| 2504 | struct TCP_Server_Info *server = tcon->ses->server; |
| 2505 | struct cifsFileInfo *cfile; |
| 2506 | int rc; |
| 2507 | |
Steve French | 087f757 | 2021-04-29 00:18:43 -0500 | [diff] [blame] | 2508 | if (unlikely(cifs_forced_shutdown(cifs_sb))) |
| 2509 | return -EIO; |
| 2510 | |
Ronnie Sahlberg | 2f3ebab | 2019-04-25 16:45:29 +1000 | [diff] [blame] | 2511 | /* |
| 2512 | * We need to be sure that all dirty pages are written as they |
| 2513 | * might fill holes on the server. |
| 2514 | */ |
| 2515 | if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping && |
| 2516 | inode->i_mapping->nrpages != 0) { |
| 2517 | rc = filemap_fdatawait(inode->i_mapping); |
| 2518 | if (rc) { |
| 2519 | mapping_set_error(inode->i_mapping, rc); |
| 2520 | return rc; |
| 2521 | } |
| 2522 | } |
| 2523 | |
| 2524 | cfile = find_readable_file(cifs_i, false); |
| 2525 | if (cfile == NULL) |
| 2526 | return -EINVAL; |
| 2527 | |
| 2528 | if (server->ops->fiemap) { |
| 2529 | rc = server->ops->fiemap(tcon, cfile, fei, start, len); |
| 2530 | cifsFileInfo_put(cfile); |
| 2531 | return rc; |
| 2532 | } |
| 2533 | |
| 2534 | cifsFileInfo_put(cfile); |
| 2535 | return -ENOTSUPP; |
| 2536 | } |
| 2537 | |
Ronnie Sahlberg | 8bd0d70 | 2020-01-17 11:45:02 +1000 | [diff] [blame] | 2538 | int cifs_truncate_page(struct address_space *mapping, loff_t from) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2539 | { |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 2540 | pgoff_t index = from >> PAGE_SHIFT; |
| 2541 | unsigned offset = from & (PAGE_SIZE - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2542 | struct page *page; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2543 | int rc = 0; |
| 2544 | |
| 2545 | page = grab_cache_page(mapping, index); |
| 2546 | if (!page) |
| 2547 | return -ENOMEM; |
| 2548 | |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 2549 | zero_user_segment(page, offset, PAGE_SIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2550 | unlock_page(page); |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 2551 | put_page(page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2552 | return rc; |
| 2553 | } |
| 2554 | |
Ronnie Sahlberg | 8bd0d70 | 2020-01-17 11:45:02 +1000 | [diff] [blame] | 2555 | void cifs_setsize(struct inode *inode, loff_t offset) |
Steve French | 3677db1 | 2007-02-26 16:46:11 +0000 | [diff] [blame] | 2556 | { |
Ronnie Sahlberg | 57c55cd | 2018-05-24 06:54:27 +1000 | [diff] [blame] | 2557 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
| 2558 | |
Steve French | ba6a46a | 2007-02-26 20:06:29 +0000 | [diff] [blame] | 2559 | spin_lock(&inode->i_lock); |
Steve French | 3677db1 | 2007-02-26 16:46:11 +0000 | [diff] [blame] | 2560 | i_size_write(inode, offset); |
Steve French | ba6a46a | 2007-02-26 20:06:29 +0000 | [diff] [blame] | 2561 | spin_unlock(&inode->i_lock); |
Christoph Hellwig | 1b94746 | 2010-07-18 17:51:21 -0400 | [diff] [blame] | 2562 | |
Ronnie Sahlberg | 57c55cd | 2018-05-24 06:54:27 +1000 | [diff] [blame] | 2563 | /* Cached inode must be refreshed on truncate */ |
| 2564 | cifs_i->time = 0; |
Kirill A. Shutemov | 7caef26 | 2013-09-12 15:13:56 -0700 | [diff] [blame] | 2565 | truncate_pagecache(inode, offset); |
Steve French | 3677db1 | 2007-02-26 16:46:11 +0000 | [diff] [blame] | 2566 | } |
| 2567 | |
Jeff Layton | 8efdbde | 2008-07-23 21:28:12 +0000 | [diff] [blame] | 2568 | static int |
| 2569 | cifs_set_file_size(struct inode *inode, struct iattr *attrs, |
Al Viro | f6f1f17 | 2021-03-18 15:44:05 -0400 | [diff] [blame] | 2570 | unsigned int xid, const char *full_path) |
Jeff Layton | 8efdbde | 2008-07-23 21:28:12 +0000 | [diff] [blame] | 2571 | { |
| 2572 | int rc; |
| 2573 | struct cifsFileInfo *open_file; |
| 2574 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
| 2575 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 2576 | struct tcon_link *tlink = NULL; |
Pavel Shilovsky | d143341 | 2012-09-18 16:20:31 -0700 | [diff] [blame] | 2577 | struct cifs_tcon *tcon = NULL; |
| 2578 | struct TCP_Server_Info *server; |
Jeff Layton | 8efdbde | 2008-07-23 21:28:12 +0000 | [diff] [blame] | 2579 | |
| 2580 | /* |
| 2581 | * To avoid spurious oplock breaks from server, in the case of |
| 2582 | * inodes that we already have open, avoid doing path based |
| 2583 | * setting of file size if we can do it by handle. |
| 2584 | * This keeps our caching token (oplock) and avoids timeouts |
| 2585 | * when the local oplock break takes longer to flush |
| 2586 | * writebehind data than the SMB timeout for the SetPathInfo |
| 2587 | * request would allow |
| 2588 | */ |
Aurelien Aptel | 86f740f | 2020-02-21 11:19:06 +0100 | [diff] [blame] | 2589 | open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY); |
Jeff Layton | 8efdbde | 2008-07-23 21:28:12 +0000 | [diff] [blame] | 2590 | if (open_file) { |
Pavel Shilovsky | d143341 | 2012-09-18 16:20:31 -0700 | [diff] [blame] | 2591 | tcon = tlink_tcon(open_file->tlink); |
| 2592 | server = tcon->ses->server; |
| 2593 | if (server->ops->set_file_size) |
| 2594 | rc = server->ops->set_file_size(xid, tcon, open_file, |
| 2595 | attrs->ia_size, false); |
| 2596 | else |
| 2597 | rc = -ENOSYS; |
Dave Kleikamp | 6ab409b | 2009-08-31 11:07:12 -0400 | [diff] [blame] | 2598 | cifsFileInfo_put(open_file); |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2599 | cifs_dbg(FYI, "SetFSize for attrs rc = %d\n", rc); |
Jeff Layton | 8efdbde | 2008-07-23 21:28:12 +0000 | [diff] [blame] | 2600 | } else |
| 2601 | rc = -EINVAL; |
| 2602 | |
Pavel Shilovsky | d143341 | 2012-09-18 16:20:31 -0700 | [diff] [blame] | 2603 | if (!rc) |
| 2604 | goto set_size_out; |
Jeff Layton | ba00ba64 | 2010-09-20 16:01:31 -0700 | [diff] [blame] | 2605 | |
Pavel Shilovsky | d143341 | 2012-09-18 16:20:31 -0700 | [diff] [blame] | 2606 | if (tcon == NULL) { |
| 2607 | tlink = cifs_sb_tlink(cifs_sb); |
| 2608 | if (IS_ERR(tlink)) |
| 2609 | return PTR_ERR(tlink); |
| 2610 | tcon = tlink_tcon(tlink); |
| 2611 | server = tcon->ses->server; |
Jeff Layton | 8efdbde | 2008-07-23 21:28:12 +0000 | [diff] [blame] | 2612 | } |
| 2613 | |
Pavel Shilovsky | d143341 | 2012-09-18 16:20:31 -0700 | [diff] [blame] | 2614 | /* |
| 2615 | * Set file size by pathname rather than by handle either because no |
| 2616 | * valid, writeable file handle for it was found or because there was |
| 2617 | * an error setting it by handle. |
| 2618 | */ |
| 2619 | if (server->ops->set_path_size) |
| 2620 | rc = server->ops->set_path_size(xid, tcon, full_path, |
| 2621 | attrs->ia_size, cifs_sb, false); |
| 2622 | else |
| 2623 | rc = -ENOSYS; |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2624 | cifs_dbg(FYI, "SetEOF by path (setattrs) rc = %d\n", rc); |
Pavel Shilovsky | d143341 | 2012-09-18 16:20:31 -0700 | [diff] [blame] | 2625 | |
Pavel Shilovsky | d143341 | 2012-09-18 16:20:31 -0700 | [diff] [blame] | 2626 | if (tlink) |
| 2627 | cifs_put_tlink(tlink); |
| 2628 | |
| 2629 | set_size_out: |
Jeff Layton | 8efdbde | 2008-07-23 21:28:12 +0000 | [diff] [blame] | 2630 | if (rc == 0) { |
Jeff Layton | fbec9ab | 2009-04-03 13:44:00 -0400 | [diff] [blame] | 2631 | cifsInode->server_eof = attrs->ia_size; |
Christoph Hellwig | 1b94746 | 2010-07-18 17:51:21 -0400 | [diff] [blame] | 2632 | cifs_setsize(inode, attrs->ia_size); |
Steve French | 65af8f0 | 2021-03-19 00:05:48 -0500 | [diff] [blame] | 2633 | /* |
| 2634 | * i_blocks is not related to (i_size / i_blksize), but instead |
| 2635 | * 512 byte (2**9) size is required for calculating num blocks. |
| 2636 | * Until we can query the server for actual allocation size, |
| 2637 | * this is best estimate we have for blocks allocated for a file |
| 2638 | * Number of blocks must be rounded up so size 1 is not 0 blocks |
| 2639 | */ |
| 2640 | inode->i_blocks = (512 - 1 + attrs->ia_size) >> 9; |
Zhang Xiaoxu | 5618303 | 2020-06-19 22:51:29 -0400 | [diff] [blame] | 2641 | |
| 2642 | /* |
| 2643 | * The man page of truncate says if the size changed, |
| 2644 | * then the st_ctime and st_mtime fields for the file |
| 2645 | * are updated. |
| 2646 | */ |
| 2647 | attrs->ia_ctime = attrs->ia_mtime = current_time(inode); |
| 2648 | attrs->ia_valid |= ATTR_CTIME | ATTR_MTIME; |
| 2649 | |
Jeff Layton | 8efdbde | 2008-07-23 21:28:12 +0000 | [diff] [blame] | 2650 | cifs_truncate_page(inode->i_mapping, inode->i_size); |
| 2651 | } |
| 2652 | |
| 2653 | return rc; |
| 2654 | } |
| 2655 | |
Jeff Layton | 3fe5c1d | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 2656 | static int |
| 2657 | cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs) |
| 2658 | { |
| 2659 | int rc; |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 2660 | unsigned int xid; |
Al Viro | f6a9bc3 | 2021-03-05 17:36:04 -0500 | [diff] [blame] | 2661 | const char *full_path; |
| 2662 | void *page = alloc_dentry_path(); |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 2663 | struct inode *inode = d_inode(direntry); |
Jeff Layton | 3fe5c1d | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 2664 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
| 2665 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 2666 | struct tcon_link *tlink; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2667 | struct cifs_tcon *pTcon; |
Jeff Layton | 3fe5c1d | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 2668 | struct cifs_unix_set_info_args *args = NULL; |
Jeff Layton | 3bbeeb3 | 2009-07-09 20:02:50 -0400 | [diff] [blame] | 2669 | struct cifsFileInfo *open_file; |
Jeff Layton | 3fe5c1d | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 2670 | |
Al Viro | 35c265e | 2014-08-19 20:25:34 -0400 | [diff] [blame] | 2671 | cifs_dbg(FYI, "setattr_unix on file %pd attrs->ia_valid=0x%x\n", |
| 2672 | direntry, attrs->ia_valid); |
Jeff Layton | 3fe5c1d | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 2673 | |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 2674 | xid = get_xid(); |
Jeff Layton | 3fe5c1d | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 2675 | |
Christoph Hellwig | db78b877 | 2010-06-04 11:30:03 +0200 | [diff] [blame] | 2676 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) |
| 2677 | attrs->ia_valid |= ATTR_FORCE; |
| 2678 | |
Christian Brauner | 2f221d6 | 2021-01-21 14:19:26 +0100 | [diff] [blame] | 2679 | rc = setattr_prepare(&init_user_ns, direntry, attrs); |
Christoph Hellwig | db78b877 | 2010-06-04 11:30:03 +0200 | [diff] [blame] | 2680 | if (rc < 0) |
| 2681 | goto out; |
Jeff Layton | 3fe5c1d | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 2682 | |
Al Viro | f6a9bc3 | 2021-03-05 17:36:04 -0500 | [diff] [blame] | 2683 | full_path = build_path_from_dentry(direntry, page); |
| 2684 | if (IS_ERR(full_path)) { |
| 2685 | rc = PTR_ERR(full_path); |
Jeff Layton | 3fe5c1d | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 2686 | goto out; |
| 2687 | } |
| 2688 | |
Jeff Layton | 0f4d634 | 2009-03-26 13:35:37 -0400 | [diff] [blame] | 2689 | /* |
| 2690 | * Attempt to flush data before changing attributes. We need to do |
| 2691 | * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the |
| 2692 | * ownership or mode then we may also need to do this. Here, we take |
| 2693 | * the safe way out and just do the flush on all setattr requests. If |
| 2694 | * the flush returns error, store it to report later and continue. |
| 2695 | * |
| 2696 | * BB: This should be smarter. Why bother flushing pages that |
| 2697 | * will be truncated anyway? Also, should we error out here if |
| 2698 | * the flush returns error? |
| 2699 | */ |
| 2700 | rc = filemap_write_and_wait(inode->i_mapping); |
Pavel Shilovsky | 9a66396 | 2019-01-08 11:15:28 -0800 | [diff] [blame] | 2701 | if (is_interrupt_error(rc)) { |
| 2702 | rc = -ERESTARTSYS; |
| 2703 | goto out; |
| 2704 | } |
| 2705 | |
Jeff Layton | eb4b756 | 2010-10-22 14:52:29 -0400 | [diff] [blame] | 2706 | mapping_set_error(inode->i_mapping, rc); |
| 2707 | rc = 0; |
Jeff Layton | 3fe5c1d | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 2708 | |
| 2709 | if (attrs->ia_valid & ATTR_SIZE) { |
| 2710 | rc = cifs_set_file_size(inode, attrs, xid, full_path); |
| 2711 | if (rc != 0) |
| 2712 | goto out; |
| 2713 | } |
| 2714 | |
| 2715 | /* skip mode change if it's just for clearing setuid/setgid */ |
| 2716 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) |
| 2717 | attrs->ia_valid &= ~ATTR_MODE; |
| 2718 | |
| 2719 | args = kmalloc(sizeof(*args), GFP_KERNEL); |
| 2720 | if (args == NULL) { |
| 2721 | rc = -ENOMEM; |
| 2722 | goto out; |
| 2723 | } |
| 2724 | |
| 2725 | /* set up the struct */ |
| 2726 | if (attrs->ia_valid & ATTR_MODE) |
| 2727 | args->mode = attrs->ia_mode; |
| 2728 | else |
| 2729 | args->mode = NO_CHANGE_64; |
| 2730 | |
| 2731 | if (attrs->ia_valid & ATTR_UID) |
| 2732 | args->uid = attrs->ia_uid; |
| 2733 | else |
Eric W. Biederman | 49418b2 | 2013-02-06 00:57:56 -0800 | [diff] [blame] | 2734 | args->uid = INVALID_UID; /* no change */ |
Jeff Layton | 3fe5c1d | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 2735 | |
| 2736 | if (attrs->ia_valid & ATTR_GID) |
| 2737 | args->gid = attrs->ia_gid; |
| 2738 | else |
Eric W. Biederman | 49418b2 | 2013-02-06 00:57:56 -0800 | [diff] [blame] | 2739 | args->gid = INVALID_GID; /* no change */ |
Jeff Layton | 3fe5c1d | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 2740 | |
| 2741 | if (attrs->ia_valid & ATTR_ATIME) |
Arnd Bergmann | 9539020 | 2018-06-19 17:27:58 +0200 | [diff] [blame] | 2742 | args->atime = cifs_UnixTimeToNT(attrs->ia_atime); |
Jeff Layton | 3fe5c1d | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 2743 | else |
| 2744 | args->atime = NO_CHANGE_64; |
| 2745 | |
| 2746 | if (attrs->ia_valid & ATTR_MTIME) |
Arnd Bergmann | 9539020 | 2018-06-19 17:27:58 +0200 | [diff] [blame] | 2747 | args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime); |
Jeff Layton | 3fe5c1d | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 2748 | else |
| 2749 | args->mtime = NO_CHANGE_64; |
| 2750 | |
| 2751 | if (attrs->ia_valid & ATTR_CTIME) |
Arnd Bergmann | 9539020 | 2018-06-19 17:27:58 +0200 | [diff] [blame] | 2752 | args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime); |
Jeff Layton | 3fe5c1d | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 2753 | else |
| 2754 | args->ctime = NO_CHANGE_64; |
| 2755 | |
| 2756 | args->device = 0; |
Aurelien Aptel | 86f740f | 2020-02-21 11:19:06 +0100 | [diff] [blame] | 2757 | open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY); |
Jeff Layton | 3bbeeb3 | 2009-07-09 20:02:50 -0400 | [diff] [blame] | 2758 | if (open_file) { |
Pavel Shilovsky | 4b4de76 | 2012-09-18 16:20:26 -0700 | [diff] [blame] | 2759 | u16 nfid = open_file->fid.netfid; |
Jeff Layton | 3bbeeb3 | 2009-07-09 20:02:50 -0400 | [diff] [blame] | 2760 | u32 npid = open_file->pid; |
Jeff Layton | 13cfb73 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 2761 | pTcon = tlink_tcon(open_file->tlink); |
Jeff Layton | 3bbeeb3 | 2009-07-09 20:02:50 -0400 | [diff] [blame] | 2762 | rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid); |
Dave Kleikamp | 6ab409b | 2009-08-31 11:07:12 -0400 | [diff] [blame] | 2763 | cifsFileInfo_put(open_file); |
Jeff Layton | 3bbeeb3 | 2009-07-09 20:02:50 -0400 | [diff] [blame] | 2764 | } else { |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 2765 | tlink = cifs_sb_tlink(cifs_sb); |
| 2766 | if (IS_ERR(tlink)) { |
| 2767 | rc = PTR_ERR(tlink); |
| 2768 | goto out; |
| 2769 | } |
| 2770 | pTcon = tlink_tcon(tlink); |
Jeff Layton | 3bbeeb3 | 2009-07-09 20:02:50 -0400 | [diff] [blame] | 2771 | rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args, |
Jeff Layton | 01ea95e | 2009-07-09 20:02:49 -0400 | [diff] [blame] | 2772 | cifs_sb->local_nls, |
Nakajima Akira | bc8ebdc4 | 2015-02-13 15:35:58 +0900 | [diff] [blame] | 2773 | cifs_remap(cifs_sb)); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 2774 | cifs_put_tlink(tlink); |
Jeff Layton | 3bbeeb3 | 2009-07-09 20:02:50 -0400 | [diff] [blame] | 2775 | } |
Jeff Layton | 3fe5c1d | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 2776 | |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 2777 | if (rc) |
| 2778 | goto out; |
Steve French | ccd4bb1 | 2010-02-08 17:39:58 +0000 | [diff] [blame] | 2779 | |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 2780 | if ((attrs->ia_valid & ATTR_SIZE) && |
David Howells | 70431bf | 2020-11-17 15:56:59 +0000 | [diff] [blame] | 2781 | attrs->ia_size != i_size_read(inode)) { |
Christoph Hellwig | 1b94746 | 2010-07-18 17:51:21 -0400 | [diff] [blame] | 2782 | truncate_setsize(inode, attrs->ia_size); |
David Howells | 70431bf | 2020-11-17 15:56:59 +0000 | [diff] [blame] | 2783 | fscache_resize_cookie(cifs_inode_cookie(inode), attrs->ia_size); |
| 2784 | } |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 2785 | |
Christian Brauner | 2f221d6 | 2021-01-21 14:19:26 +0100 | [diff] [blame] | 2786 | setattr_copy(&init_user_ns, inode, attrs); |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 2787 | mark_inode_dirty(inode); |
| 2788 | |
| 2789 | /* force revalidate when any of these times are set since some |
| 2790 | of the fs types (eg ext3, fat) do not have fine enough |
| 2791 | time granularity to match protocol, and we do not have a |
| 2792 | a way (yet) to query the server fs's time granularity (and |
| 2793 | whether it rounds times down). |
| 2794 | */ |
| 2795 | if (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME)) |
| 2796 | cifsInode->time = 0; |
Jeff Layton | 3fe5c1d | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 2797 | out: |
| 2798 | kfree(args); |
Al Viro | f6a9bc3 | 2021-03-05 17:36:04 -0500 | [diff] [blame] | 2799 | free_dentry_path(page); |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 2800 | free_xid(xid); |
Jeff Layton | 3fe5c1d | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 2801 | return rc; |
| 2802 | } |
| 2803 | |
Jeff Layton | 0510eeb | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 2804 | static int |
| 2805 | cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2806 | { |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 2807 | unsigned int xid; |
Eric W. Biederman | 8abf277 | 2013-02-06 00:33:17 -0800 | [diff] [blame] | 2808 | kuid_t uid = INVALID_UID; |
| 2809 | kgid_t gid = INVALID_GID; |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 2810 | struct inode *inode = d_inode(direntry); |
Jeff Layton | 3fe5c1d | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 2811 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
Jeff Layton | 3fe5c1d | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 2812 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
Ronnie Sahlberg | aa08185 | 2019-07-19 08:12:11 +1000 | [diff] [blame] | 2813 | struct cifsFileInfo *wfile; |
| 2814 | struct cifs_tcon *tcon; |
Al Viro | f6a9bc3 | 2021-03-05 17:36:04 -0500 | [diff] [blame] | 2815 | const char *full_path; |
| 2816 | void *page = alloc_dentry_path(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2817 | int rc = -EACCES; |
Jeff Layton | feb3e20 | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 2818 | __u32 dosattr = 0; |
Jeff Layton | 4e1e7fb | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 2819 | __u64 mode = NO_CHANGE_64; |
Jeff Layton | 3fe5c1d | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 2820 | |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 2821 | xid = get_xid(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2822 | |
Colin Ian King | 63d614a | 2019-06-24 17:39:43 +0100 | [diff] [blame] | 2823 | cifs_dbg(FYI, "setattr on file %pd attrs->ia_valid 0x%x\n", |
Al Viro | 35c265e | 2014-08-19 20:25:34 -0400 | [diff] [blame] | 2824 | direntry, attrs->ia_valid); |
Steve French | 6473a55 | 2005-11-29 20:20:10 -0800 | [diff] [blame] | 2825 | |
Christoph Hellwig | db78b877 | 2010-06-04 11:30:03 +0200 | [diff] [blame] | 2826 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) |
| 2827 | attrs->ia_valid |= ATTR_FORCE; |
| 2828 | |
Christian Brauner | 2f221d6 | 2021-01-21 14:19:26 +0100 | [diff] [blame] | 2829 | rc = setattr_prepare(&init_user_ns, direntry, attrs); |
Al Viro | f6a9bc3 | 2021-03-05 17:36:04 -0500 | [diff] [blame] | 2830 | if (rc < 0) |
| 2831 | goto cifs_setattr_exit; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 2832 | |
Al Viro | f6a9bc3 | 2021-03-05 17:36:04 -0500 | [diff] [blame] | 2833 | full_path = build_path_from_dentry(direntry, page); |
| 2834 | if (IS_ERR(full_path)) { |
| 2835 | rc = PTR_ERR(full_path); |
| 2836 | goto cifs_setattr_exit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2837 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2838 | |
Jeff Layton | 0f4d634 | 2009-03-26 13:35:37 -0400 | [diff] [blame] | 2839 | /* |
| 2840 | * Attempt to flush data before changing attributes. We need to do |
Steve French | cf5371a | 2020-02-24 17:37:39 -0600 | [diff] [blame] | 2841 | * this for ATTR_SIZE and ATTR_MTIME. If the flush of the data |
| 2842 | * returns error, store it to report later and continue. |
Jeff Layton | 0f4d634 | 2009-03-26 13:35:37 -0400 | [diff] [blame] | 2843 | * |
| 2844 | * BB: This should be smarter. Why bother flushing pages that |
| 2845 | * will be truncated anyway? Also, should we error out here if |
Steve French | cf5371a | 2020-02-24 17:37:39 -0600 | [diff] [blame] | 2846 | * the flush returns error? Do we need to check for ATTR_MTIME_SET flag? |
Jeff Layton | 0f4d634 | 2009-03-26 13:35:37 -0400 | [diff] [blame] | 2847 | */ |
Steve French | cf5371a | 2020-02-24 17:37:39 -0600 | [diff] [blame] | 2848 | if (attrs->ia_valid & (ATTR_MTIME | ATTR_SIZE | ATTR_CTIME)) { |
| 2849 | rc = filemap_write_and_wait(inode->i_mapping); |
| 2850 | if (is_interrupt_error(rc)) { |
| 2851 | rc = -ERESTARTSYS; |
| 2852 | goto cifs_setattr_exit; |
| 2853 | } |
| 2854 | mapping_set_error(inode->i_mapping, rc); |
Pavel Shilovsky | 9a66396 | 2019-01-08 11:15:28 -0800 | [diff] [blame] | 2855 | } |
| 2856 | |
Jeff Layton | eb4b756 | 2010-10-22 14:52:29 -0400 | [diff] [blame] | 2857 | rc = 0; |
Jeff Layton | cea2180 | 2007-11-20 23:19:03 +0000 | [diff] [blame] | 2858 | |
Steve French | cf5371a | 2020-02-24 17:37:39 -0600 | [diff] [blame] | 2859 | if ((attrs->ia_valid & ATTR_MTIME) && |
| 2860 | !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) { |
Aurelien Aptel | 86f740f | 2020-02-21 11:19:06 +0100 | [diff] [blame] | 2861 | rc = cifs_get_writable_file(cifsInode, FIND_WR_ANY, &wfile); |
Ronnie Sahlberg | aa08185 | 2019-07-19 08:12:11 +1000 | [diff] [blame] | 2862 | if (!rc) { |
| 2863 | tcon = tlink_tcon(wfile->tlink); |
| 2864 | rc = tcon->ses->server->ops->flush(xid, tcon, &wfile->fid); |
| 2865 | cifsFileInfo_put(wfile); |
| 2866 | if (rc) |
Chuhong Yuan | 783bf7b | 2019-10-14 15:15:31 +0800 | [diff] [blame] | 2867 | goto cifs_setattr_exit; |
Ronnie Sahlberg | aa08185 | 2019-07-19 08:12:11 +1000 | [diff] [blame] | 2868 | } else if (rc != -EBADF) |
Chuhong Yuan | 783bf7b | 2019-10-14 15:15:31 +0800 | [diff] [blame] | 2869 | goto cifs_setattr_exit; |
Ronnie Sahlberg | aa08185 | 2019-07-19 08:12:11 +1000 | [diff] [blame] | 2870 | else |
| 2871 | rc = 0; |
| 2872 | } |
| 2873 | |
Steve French | 5053144 | 2008-03-14 19:21:31 +0000 | [diff] [blame] | 2874 | if (attrs->ia_valid & ATTR_SIZE) { |
Jeff Layton | 8efdbde | 2008-07-23 21:28:12 +0000 | [diff] [blame] | 2875 | rc = cifs_set_file_size(inode, attrs, xid, full_path); |
| 2876 | if (rc != 0) |
Steve French | e30dcf3 | 2005-09-20 20:49:16 -0700 | [diff] [blame] | 2877 | goto cifs_setattr_exit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2878 | } |
Jeff Layton | 4ca691a | 2008-05-22 09:33:34 -0400 | [diff] [blame] | 2879 | |
Shirish Pargaonkar | a5ff376 | 2011-10-13 10:26:03 -0500 | [diff] [blame] | 2880 | if (attrs->ia_valid & ATTR_UID) |
| 2881 | uid = attrs->ia_uid; |
| 2882 | |
| 2883 | if (attrs->ia_valid & ATTR_GID) |
| 2884 | gid = attrs->ia_gid; |
| 2885 | |
Steve French | 2244217 | 2019-07-19 08:15:55 +0000 | [diff] [blame] | 2886 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) || |
| 2887 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) { |
Eric W. Biederman | 8abf277 | 2013-02-06 00:33:17 -0800 | [diff] [blame] | 2888 | if (uid_valid(uid) || gid_valid(gid)) { |
Shyam Prasad N | 0f22053 | 2020-08-17 03:23:12 -0700 | [diff] [blame] | 2889 | mode = NO_CHANGE_64; |
| 2890 | rc = id_mode_to_cifs_acl(inode, full_path, &mode, |
Shirish Pargaonkar | a5ff376 | 2011-10-13 10:26:03 -0500 | [diff] [blame] | 2891 | uid, gid); |
| 2892 | if (rc) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2893 | cifs_dbg(FYI, "%s: Setting id failed with error: %d\n", |
| 2894 | __func__, rc); |
Shirish Pargaonkar | a5ff376 | 2011-10-13 10:26:03 -0500 | [diff] [blame] | 2895 | goto cifs_setattr_exit; |
| 2896 | } |
| 2897 | } |
| 2898 | } else |
Jeff Layton | 3fe5c1d | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 2899 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) |
Jeff Layton | 4ca691a | 2008-05-22 09:33:34 -0400 | [diff] [blame] | 2900 | attrs->ia_valid &= ~(ATTR_UID | ATTR_GID); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2901 | |
Jeff Layton | d32c4f2 | 2007-10-18 03:05:22 -0700 | [diff] [blame] | 2902 | /* skip mode change if it's just for clearing setuid/setgid */ |
| 2903 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) |
| 2904 | attrs->ia_valid &= ~ATTR_MODE; |
| 2905 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2906 | if (attrs->ia_valid & ATTR_MODE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2907 | mode = attrs->ia_mode; |
Steve French | cdbce9c8 | 2005-11-19 21:04:52 -0800 | [diff] [blame] | 2908 | rc = 0; |
Steve French | 2244217 | 2019-07-19 08:15:55 +0000 | [diff] [blame] | 2909 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) || |
| 2910 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) { |
Shyam Prasad N | 0f22053 | 2020-08-17 03:23:12 -0700 | [diff] [blame] | 2911 | rc = id_mode_to_cifs_acl(inode, full_path, &mode, |
Eric W. Biederman | 8abf277 | 2013-02-06 00:33:17 -0800 | [diff] [blame] | 2912 | INVALID_UID, INVALID_GID); |
Shirish Pargaonkar | 78415d2 | 2010-11-27 11:37:26 -0600 | [diff] [blame] | 2913 | if (rc) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2914 | cifs_dbg(FYI, "%s: Setting ACL failed with error: %d\n", |
| 2915 | __func__, rc); |
Shirish Pargaonkar | 78415d2 | 2010-11-27 11:37:26 -0600 | [diff] [blame] | 2916 | goto cifs_setattr_exit; |
| 2917 | } |
Shyam Prasad N | 0f22053 | 2020-08-17 03:23:12 -0700 | [diff] [blame] | 2918 | |
| 2919 | /* |
| 2920 | * In case of CIFS_MOUNT_CIFS_ACL, we cannot support all modes. |
| 2921 | * Pick up the actual mode bits that were set. |
| 2922 | */ |
| 2923 | if (mode != attrs->ia_mode) |
| 2924 | attrs->ia_mode = mode; |
Shirish Pargaonkar | 78415d2 | 2010-11-27 11:37:26 -0600 | [diff] [blame] | 2925 | } else |
Jeff Layton | 5132861 | 2008-05-22 09:33:34 -0400 | [diff] [blame] | 2926 | if (((mode & S_IWUGO) == 0) && |
| 2927 | (cifsInode->cifsAttrs & ATTR_READONLY) == 0) { |
Jeff Layton | feb3e20 | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 2928 | |
| 2929 | dosattr = cifsInode->cifsAttrs | ATTR_READONLY; |
| 2930 | |
Jeff Layton | 5132861 | 2008-05-22 09:33:34 -0400 | [diff] [blame] | 2931 | /* fix up mode if we're not using dynperm */ |
| 2932 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0) |
| 2933 | attrs->ia_mode = inode->i_mode & ~S_IWUGO; |
| 2934 | } else if ((mode & S_IWUGO) && |
| 2935 | (cifsInode->cifsAttrs & ATTR_READONLY)) { |
Jeff Layton | feb3e20 | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 2936 | |
| 2937 | dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY; |
| 2938 | /* Attributes of 0 are ignored */ |
| 2939 | if (dosattr == 0) |
| 2940 | dosattr |= ATTR_NORMAL; |
Jeff Layton | 5132861 | 2008-05-22 09:33:34 -0400 | [diff] [blame] | 2941 | |
| 2942 | /* reset local inode permissions to normal */ |
| 2943 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { |
| 2944 | attrs->ia_mode &= ~(S_IALLUGO); |
| 2945 | if (S_ISDIR(inode->i_mode)) |
| 2946 | attrs->ia_mode |= |
Ronnie Sahlberg | 8401e93 | 2020-12-12 13:40:50 -0600 | [diff] [blame] | 2947 | cifs_sb->ctx->dir_mode; |
Jeff Layton | 5132861 | 2008-05-22 09:33:34 -0400 | [diff] [blame] | 2948 | else |
| 2949 | attrs->ia_mode |= |
Ronnie Sahlberg | 8401e93 | 2020-12-12 13:40:50 -0600 | [diff] [blame] | 2950 | cifs_sb->ctx->file_mode; |
Jeff Layton | 5132861 | 2008-05-22 09:33:34 -0400 | [diff] [blame] | 2951 | } |
| 2952 | } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { |
| 2953 | /* ignore mode change - ATTR_READONLY hasn't changed */ |
| 2954 | attrs->ia_valid &= ~ATTR_MODE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2955 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2956 | } |
| 2957 | |
Jeff Layton | feb3e20 | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 2958 | if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) || |
| 2959 | ((attrs->ia_valid & ATTR_MODE) && dosattr)) { |
| 2960 | rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); |
| 2961 | /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2962 | |
Steve French | e30dcf3 | 2005-09-20 20:49:16 -0700 | [diff] [blame] | 2963 | /* Even if error on time set, no sense failing the call if |
| 2964 | the server would set the time to a reasonable value anyway, |
| 2965 | and this check ensures that we are not being called from |
| 2966 | sys_utimes in which case we ought to fail the call back to |
| 2967 | the user when the server rejects the call */ |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 2968 | if ((rc) && (attrs->ia_valid & |
Jeff Layton | feb3e20 | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 2969 | (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE))) |
Steve French | e30dcf3 | 2005-09-20 20:49:16 -0700 | [diff] [blame] | 2970 | rc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2971 | } |
| 2972 | |
| 2973 | /* do not need local check to inode_check_ok since the server does |
| 2974 | that */ |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 2975 | if (rc) |
| 2976 | goto cifs_setattr_exit; |
| 2977 | |
| 2978 | if ((attrs->ia_valid & ATTR_SIZE) && |
David Howells | 70431bf | 2020-11-17 15:56:59 +0000 | [diff] [blame] | 2979 | attrs->ia_size != i_size_read(inode)) { |
Christoph Hellwig | 1b94746 | 2010-07-18 17:51:21 -0400 | [diff] [blame] | 2980 | truncate_setsize(inode, attrs->ia_size); |
David Howells | 70431bf | 2020-11-17 15:56:59 +0000 | [diff] [blame] | 2981 | fscache_resize_cookie(cifs_inode_cookie(inode), attrs->ia_size); |
| 2982 | } |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 2983 | |
Christian Brauner | 2f221d6 | 2021-01-21 14:19:26 +0100 | [diff] [blame] | 2984 | setattr_copy(&init_user_ns, inode, attrs); |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 2985 | mark_inode_dirty(inode); |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 2986 | |
Steve French | e30dcf3 | 2005-09-20 20:49:16 -0700 | [diff] [blame] | 2987 | cifs_setattr_exit: |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 2988 | free_xid(xid); |
Al Viro | f6a9bc3 | 2021-03-05 17:36:04 -0500 | [diff] [blame] | 2989 | free_dentry_path(page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2990 | return rc; |
| 2991 | } |
| 2992 | |
Jeff Layton | 0510eeb | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 2993 | int |
Christian Brauner | 549c729 | 2021-01-21 14:19:43 +0100 | [diff] [blame] | 2994 | cifs_setattr(struct user_namespace *mnt_userns, struct dentry *direntry, |
| 2995 | struct iattr *attrs) |
Jeff Layton | 0510eeb | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 2996 | { |
Al Viro | fc64005 | 2016-04-10 01:33:30 -0400 | [diff] [blame] | 2997 | struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb); |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2998 | struct cifs_tcon *pTcon = cifs_sb_master_tcon(cifs_sb); |
Ronnie Sahlberg | c6cc4c5 | 2020-10-09 09:32:56 +1000 | [diff] [blame] | 2999 | int rc, retries = 0; |
Jeff Layton | 0510eeb | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 3000 | |
Steve French | 087f757 | 2021-04-29 00:18:43 -0500 | [diff] [blame] | 3001 | if (unlikely(cifs_forced_shutdown(cifs_sb))) |
| 3002 | return -EIO; |
| 3003 | |
Ronnie Sahlberg | c6cc4c5 | 2020-10-09 09:32:56 +1000 | [diff] [blame] | 3004 | do { |
| 3005 | if (pTcon->unix_ext) |
| 3006 | rc = cifs_setattr_unix(direntry, attrs); |
| 3007 | else |
| 3008 | rc = cifs_setattr_nounix(direntry, attrs); |
| 3009 | retries++; |
| 3010 | } while (is_retryable_error(rc) && retries < 2); |
Jeff Layton | 0510eeb | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 3011 | |
| 3012 | /* BB: add cifs_setattr_legacy for really old servers */ |
Ronnie Sahlberg | c6cc4c5 | 2020-10-09 09:32:56 +1000 | [diff] [blame] | 3013 | return rc; |
Jeff Layton | 0510eeb | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 3014 | } |