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929be906 | 1 | // SPDX-License-Identifier: LGPL-2.1 |
1da177e4 | 2 | /* |
1da177e4 | 3 | * |
f19159dc | 4 | * Copyright (C) International Business Machines Corp., 2002,2010 |
1da177e4 LT |
5 | * Author(s): Steve French (sfrench@us.ibm.com) |
6 | * | |
1da177e4 LT |
7 | */ |
8 | #include <linux/fs.h> | |
1da177e4 | 9 | #include <linux/stat.h> |
5a0e3ad6 | 10 | #include <linux/slab.h> |
1da177e4 | 11 | #include <linux/pagemap.h> |
4f73c7d3 | 12 | #include <linux/freezer.h> |
174cd4b1 | 13 | #include <linux/sched/signal.h> |
5dd43ce2 | 14 | #include <linux/wait_bit.h> |
10c5db28 | 15 | #include <linux/fiemap.h> |
1da177e4 LT |
16 | #include <asm/div64.h> |
17 | #include "cifsfs.h" | |
18 | #include "cifspdu.h" | |
19 | #include "cifsglob.h" | |
20 | #include "cifsproto.h" | |
6a5f6592 | 21 | #include "smb2proto.h" |
1da177e4 LT |
22 | #include "cifs_debug.h" |
23 | #include "cifs_fs_sb.h" | |
2baa2682 | 24 | #include "cifs_unicode.h" |
9451a9a5 | 25 | #include "fscache.h" |
8401e936 | 26 | #include "fs_context.h" |
087f757b | 27 | #include "cifs_ioctl.h" |
70eff55d | 28 | |
01c64fea | 29 | static void cifs_set_ops(struct inode *inode) |
70eff55d CH |
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; | |
8be7e6ba PS |
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; | |
70eff55d CH |
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 | ||
70eff55d | 52 | /* check if server can support readpages */ |
1f641d94 | 53 | if (cifs_sb_master_tcon(cifs_sb)->ses->server->max_read < |
09cbfeaf | 54 | PAGE_SIZE + MAX_CIFS_HDR_SIZE) |
70eff55d CH |
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: | |
bc5b6e24 | 60 | #ifdef CONFIG_CIFS_DFS_UPCALL |
01c64fea | 61 | if (IS_AUTOMOUNT(inode)) { |
7962670e IM |
62 | inode->i_op = &cifs_dfs_referral_inode_operations; |
63 | } else { | |
bc5b6e24 SF |
64 | #else /* NO DFS support, treat as a directory */ |
65 | { | |
66 | #endif | |
7962670e IM |
67 | inode->i_op = &cifs_dir_inode_ops; |
68 | inode->i_fop = &cifs_dir_ops; | |
69 | } | |
70eff55d CH |
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 | ||
df2cf170 JL |
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 | { | |
86 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); | |
87 | ||
f96637be JP |
88 | cifs_dbg(FYI, "%s: revalidating inode %llu\n", |
89 | __func__, cifs_i->uniqueid); | |
df2cf170 JL |
90 | |
91 | if (inode->i_state & I_NEW) { | |
f96637be JP |
92 | cifs_dbg(FYI, "%s: inode %llu is new\n", |
93 | __func__, cifs_i->uniqueid); | |
df2cf170 JL |
94 | return; |
95 | } | |
96 | ||
97 | /* don't bother with revalidation if we have an oplock */ | |
18cceb6a | 98 | if (CIFS_CACHE_READ(cifs_i)) { |
f96637be JP |
99 | cifs_dbg(FYI, "%s: inode %llu is oplocked\n", |
100 | __func__, cifs_i->uniqueid); | |
df2cf170 JL |
101 | return; |
102 | } | |
103 | ||
104 | /* revalidate if mtime or size have changed */ | |
918c9009 | 105 | fattr->cf_mtime = timestamp_truncate(fattr->cf_mtime, inode); |
95390201 | 106 | if (timespec64_equal(&inode->i_mtime, &fattr->cf_mtime) && |
df2cf170 | 107 | cifs_i->server_eof == fattr->cf_eof) { |
f96637be JP |
108 | cifs_dbg(FYI, "%s: inode %llu is unchanged\n", |
109 | __func__, cifs_i->uniqueid); | |
df2cf170 JL |
110 | return; |
111 | } | |
112 | ||
f96637be JP |
113 | cifs_dbg(FYI, "%s: invalidating inode %llu mapping\n", |
114 | __func__, cifs_i->uniqueid); | |
aff8d5ca | 115 | set_bit(CIFS_INO_INVALID_MAPPING, &cifs_i->flags); |
df2cf170 JL |
116 | } |
117 | ||
74d290da JM |
118 | /* |
119 | * copy nlink to the inode, unless it wasn't provided. Provide | |
120 | * sane values if we don't have an existing one and none was provided | |
121 | */ | |
122 | static void | |
123 | cifs_nlink_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr) | |
124 | { | |
125 | /* | |
126 | * if we're in a situation where we can't trust what we | |
127 | * got from the server (readdir, some non-unix cases) | |
128 | * fake reasonable values | |
129 | */ | |
130 | if (fattr->cf_flags & CIFS_FATTR_UNKNOWN_NLINK) { | |
131 | /* only provide fake values on a new inode */ | |
132 | if (inode->i_state & I_NEW) { | |
133 | if (fattr->cf_cifsattrs & ATTR_DIRECTORY) | |
134 | set_nlink(inode, 2); | |
135 | else | |
136 | set_nlink(inode, 1); | |
137 | } | |
138 | return; | |
139 | } | |
140 | ||
141 | /* we trust the server, so update it */ | |
142 | set_nlink(inode, fattr->cf_nlink); | |
143 | } | |
144 | ||
cc0bad75 | 145 | /* populate an inode with info from a cifs_fattr struct */ |
4d66952a | 146 | int |
cc0bad75 | 147 | cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr) |
75f12983 | 148 | { |
cc0bad75 | 149 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
0b8f18e3 | 150 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
cc0bad75 | 151 | |
4d66952a AV |
152 | if (!(inode->i_state & I_NEW) && |
153 | unlikely(inode_wrong_type(inode, fattr->cf_mode))) { | |
154 | CIFS_I(inode)->time = 0; /* force reval */ | |
155 | return -ESTALE; | |
156 | } | |
157 | ||
df2cf170 JL |
158 | cifs_revalidate_cache(inode, fattr); |
159 | ||
b7ca6928 | 160 | spin_lock(&inode->i_lock); |
918c9009 DD |
161 | fattr->cf_mtime = timestamp_truncate(fattr->cf_mtime, inode); |
162 | fattr->cf_atime = timestamp_truncate(fattr->cf_atime, inode); | |
163 | fattr->cf_ctime = timestamp_truncate(fattr->cf_ctime, inode); | |
9b9c5bea | 164 | /* we do not want atime to be less than mtime, it broke some apps */ |
69738cfd | 165 | if (timespec64_compare(&fattr->cf_atime, &fattr->cf_mtime) < 0) |
9b9c5bea SF |
166 | inode->i_atime = fattr->cf_mtime; |
167 | else | |
168 | inode->i_atime = fattr->cf_atime; | |
95390201 AB |
169 | inode->i_mtime = fattr->cf_mtime; |
170 | inode->i_ctime = fattr->cf_ctime; | |
cc0bad75 | 171 | inode->i_rdev = fattr->cf_rdev; |
74d290da | 172 | cifs_nlink_fattr_to_inode(inode, fattr); |
cc0bad75 JL |
173 | inode->i_uid = fattr->cf_uid; |
174 | inode->i_gid = fattr->cf_gid; | |
175 | ||
0b8f18e3 JL |
176 | /* if dynperm is set, don't clobber existing mode */ |
177 | if (inode->i_state & I_NEW || | |
178 | !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) | |
179 | inode->i_mode = fattr->cf_mode; | |
180 | ||
cc0bad75 | 181 | cifs_i->cifsAttrs = fattr->cf_cifsattrs; |
75f12983 | 182 | |
0b8f18e3 JL |
183 | if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL) |
184 | cifs_i->time = 0; | |
185 | else | |
186 | cifs_i->time = jiffies; | |
187 | ||
aff8d5ca JL |
188 | if (fattr->cf_flags & CIFS_FATTR_DELETE_PENDING) |
189 | set_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags); | |
190 | else | |
191 | clear_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags); | |
cc0bad75 | 192 | |
835a36ca | 193 | cifs_i->server_eof = fattr->cf_eof; |
cc0bad75 JL |
194 | /* |
195 | * Can't safely change the file size here if the client is writing to | |
196 | * it due to potential races. | |
197 | */ | |
cc0bad75 JL |
198 | if (is_size_safe_to_change(cifs_i, fattr->cf_eof)) { |
199 | i_size_write(inode, fattr->cf_eof); | |
200 | ||
201 | /* | |
202 | * i_blocks is not related to (i_size / i_blksize), | |
203 | * but instead 512 byte (2**9) size is required for | |
204 | * calculating num blocks. | |
205 | */ | |
206 | inode->i_blocks = (512 - 1 + fattr->cf_bytes) >> 9; | |
207 | } | |
208 | spin_unlock(&inode->i_lock); | |
209 | ||
01c64fea DH |
210 | if (fattr->cf_flags & CIFS_FATTR_DFS_REFERRAL) |
211 | inode->i_flags |= S_AUTOMOUNT; | |
c2b93e06 JL |
212 | if (inode->i_state & I_NEW) |
213 | cifs_set_ops(inode); | |
4d66952a | 214 | return 0; |
cc0bad75 JL |
215 | } |
216 | ||
4065c802 JL |
217 | void |
218 | cifs_fill_uniqueid(struct super_block *sb, struct cifs_fattr *fattr) | |
219 | { | |
220 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
221 | ||
222 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
223 | return; | |
224 | ||
225 | fattr->cf_uniqueid = iunique(sb, ROOT_I); | |
226 | } | |
227 | ||
cc0bad75 JL |
228 | /* Fill a cifs_fattr struct with info from FILE_UNIX_BASIC_INFO. */ |
229 | void | |
230 | cifs_unix_basic_to_fattr(struct cifs_fattr *fattr, FILE_UNIX_BASIC_INFO *info, | |
231 | struct cifs_sb_info *cifs_sb) | |
232 | { | |
233 | memset(fattr, 0, sizeof(*fattr)); | |
234 | fattr->cf_uniqueid = le64_to_cpu(info->UniqueId); | |
235 | fattr->cf_bytes = le64_to_cpu(info->NumOfBytes); | |
236 | fattr->cf_eof = le64_to_cpu(info->EndOfFile); | |
237 | ||
238 | fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); | |
239 | fattr->cf_mtime = cifs_NTtimeToUnix(info->LastModificationTime); | |
240 | fattr->cf_ctime = cifs_NTtimeToUnix(info->LastStatusChange); | |
6e70e26d SF |
241 | /* old POSIX extensions don't get create time */ |
242 | ||
cc0bad75 | 243 | fattr->cf_mode = le64_to_cpu(info->Permissions); |
75f12983 CH |
244 | |
245 | /* | |
246 | * Since we set the inode type below we need to mask off | |
247 | * to avoid strange results if bits set above. | |
248 | */ | |
cc0bad75 | 249 | fattr->cf_mode &= ~S_IFMT; |
75f12983 CH |
250 | switch (le32_to_cpu(info->Type)) { |
251 | case UNIX_FILE: | |
cc0bad75 JL |
252 | fattr->cf_mode |= S_IFREG; |
253 | fattr->cf_dtype = DT_REG; | |
75f12983 CH |
254 | break; |
255 | case UNIX_SYMLINK: | |
cc0bad75 JL |
256 | fattr->cf_mode |= S_IFLNK; |
257 | fattr->cf_dtype = DT_LNK; | |
75f12983 CH |
258 | break; |
259 | case UNIX_DIR: | |
cc0bad75 JL |
260 | fattr->cf_mode |= S_IFDIR; |
261 | fattr->cf_dtype = DT_DIR; | |
75f12983 CH |
262 | break; |
263 | case UNIX_CHARDEV: | |
cc0bad75 JL |
264 | fattr->cf_mode |= S_IFCHR; |
265 | fattr->cf_dtype = DT_CHR; | |
266 | fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor), | |
267 | le64_to_cpu(info->DevMinor) & MINORMASK); | |
75f12983 CH |
268 | break; |
269 | case UNIX_BLOCKDEV: | |
cc0bad75 JL |
270 | fattr->cf_mode |= S_IFBLK; |
271 | fattr->cf_dtype = DT_BLK; | |
272 | fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor), | |
273 | le64_to_cpu(info->DevMinor) & MINORMASK); | |
75f12983 CH |
274 | break; |
275 | case UNIX_FIFO: | |
cc0bad75 JL |
276 | fattr->cf_mode |= S_IFIFO; |
277 | fattr->cf_dtype = DT_FIFO; | |
75f12983 CH |
278 | break; |
279 | case UNIX_SOCKET: | |
cc0bad75 JL |
280 | fattr->cf_mode |= S_IFSOCK; |
281 | fattr->cf_dtype = DT_SOCK; | |
75f12983 CH |
282 | break; |
283 | default: | |
284 | /* safest to call it a file if we do not know */ | |
cc0bad75 JL |
285 | fattr->cf_mode |= S_IFREG; |
286 | fattr->cf_dtype = DT_REG; | |
f96637be | 287 | cifs_dbg(FYI, "unknown type %d\n", le32_to_cpu(info->Type)); |
75f12983 CH |
288 | break; |
289 | } | |
290 | ||
8401e936 | 291 | fattr->cf_uid = cifs_sb->ctx->linux_uid; |
46bbc25f EB |
292 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)) { |
293 | u64 id = le64_to_cpu(info->Uid); | |
4a2c8cf5 EB |
294 | if (id < ((uid_t)-1)) { |
295 | kuid_t uid = make_kuid(&init_user_ns, id); | |
296 | if (uid_valid(uid)) | |
297 | fattr->cf_uid = uid; | |
298 | } | |
46bbc25f EB |
299 | } |
300 | ||
8401e936 | 301 | fattr->cf_gid = cifs_sb->ctx->linux_gid; |
46bbc25f EB |
302 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)) { |
303 | u64 id = le64_to_cpu(info->Gid); | |
4a2c8cf5 EB |
304 | if (id < ((gid_t)-1)) { |
305 | kgid_t gid = make_kgid(&init_user_ns, id); | |
306 | if (gid_valid(gid)) | |
307 | fattr->cf_gid = gid; | |
308 | } | |
46bbc25f | 309 | } |
75f12983 | 310 | |
cc0bad75 | 311 | fattr->cf_nlink = le64_to_cpu(info->Nlinks); |
75f12983 CH |
312 | } |
313 | ||
b9a3260f | 314 | /* |
cc0bad75 JL |
315 | * Fill a cifs_fattr struct with fake inode info. |
316 | * | |
317 | * Needed to setup cifs_fattr data for the directory which is the | |
318 | * junction to the new submount (ie to setup the fake directory | |
319 | * which represents a DFS referral). | |
b9a3260f | 320 | */ |
f1230c97 | 321 | static void |
cc0bad75 | 322 | cifs_create_dfs_fattr(struct cifs_fattr *fattr, struct super_block *sb) |
0e4bbde9 | 323 | { |
cc0bad75 | 324 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
0e4bbde9 | 325 | |
f96637be | 326 | cifs_dbg(FYI, "creating fake fattr for DFS referral\n"); |
cc0bad75 JL |
327 | |
328 | memset(fattr, 0, sizeof(*fattr)); | |
329 | fattr->cf_mode = S_IFDIR | S_IXUGO | S_IRWXU; | |
8401e936 RS |
330 | fattr->cf_uid = cifs_sb->ctx->linux_uid; |
331 | fattr->cf_gid = cifs_sb->ctx->linux_gid; | |
918c9009 | 332 | ktime_get_coarse_real_ts64(&fattr->cf_mtime); |
e37fea58 | 333 | fattr->cf_atime = fattr->cf_ctime = fattr->cf_mtime; |
cc0bad75 | 334 | fattr->cf_nlink = 2; |
97aa495a | 335 | fattr->cf_flags = CIFS_FATTR_DFS_REFERRAL; |
0e4bbde9 SF |
336 | } |
337 | ||
4ad65044 PS |
338 | static int |
339 | cifs_get_file_info_unix(struct file *filp) | |
abab095d JL |
340 | { |
341 | int rc; | |
6d5786a3 | 342 | unsigned int xid; |
abab095d JL |
343 | FILE_UNIX_BASIC_INFO find_data; |
344 | struct cifs_fattr fattr; | |
496ad9aa | 345 | struct inode *inode = file_inode(filp); |
abab095d | 346 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
c21dfb69 | 347 | struct cifsFileInfo *cfile = filp->private_data; |
96daf2b0 | 348 | struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); |
abab095d | 349 | |
6d5786a3 | 350 | xid = get_xid(); |
4b4de76e | 351 | rc = CIFSSMBUnixQFileInfo(xid, tcon, cfile->fid.netfid, &find_data); |
abab095d JL |
352 | if (!rc) { |
353 | cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb); | |
354 | } else if (rc == -EREMOTE) { | |
355 | cifs_create_dfs_fattr(&fattr, inode->i_sb); | |
356 | rc = 0; | |
e39df241 SF |
357 | } else |
358 | goto cifs_gfiunix_out; | |
abab095d | 359 | |
4d66952a | 360 | rc = cifs_fattr_to_inode(inode, &fattr); |
e39df241 SF |
361 | |
362 | cifs_gfiunix_out: | |
6d5786a3 | 363 | free_xid(xid); |
abab095d JL |
364 | return rc; |
365 | } | |
366 | ||
1da177e4 | 367 | int cifs_get_inode_info_unix(struct inode **pinode, |
cc0bad75 | 368 | const unsigned char *full_path, |
6d5786a3 | 369 | struct super_block *sb, unsigned int xid) |
1da177e4 | 370 | { |
cc0bad75 | 371 | int rc; |
0e4bbde9 | 372 | FILE_UNIX_BASIC_INFO find_data; |
cc0bad75 | 373 | struct cifs_fattr fattr; |
96daf2b0 | 374 | struct cifs_tcon *tcon; |
7ffec372 | 375 | struct tcon_link *tlink; |
1da177e4 | 376 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
1da177e4 | 377 | |
f96637be | 378 | cifs_dbg(FYI, "Getting info on %s\n", full_path); |
7962670e | 379 | |
7ffec372 JL |
380 | tlink = cifs_sb_tlink(cifs_sb); |
381 | if (IS_ERR(tlink)) | |
382 | return PTR_ERR(tlink); | |
383 | tcon = tlink_tcon(tlink); | |
384 | ||
1da177e4 | 385 | /* could have done a find first instead but this returns more info */ |
cc0bad75 | 386 | rc = CIFSSMBUnixQPathInfo(xid, tcon, full_path, &find_data, |
bc8ebdc4 | 387 | cifs_sb->local_nls, cifs_remap(cifs_sb)); |
7ffec372 | 388 | cifs_put_tlink(tlink); |
e911d0cc | 389 | |
cc0bad75 JL |
390 | if (!rc) { |
391 | cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb); | |
392 | } else if (rc == -EREMOTE) { | |
393 | cifs_create_dfs_fattr(&fattr, sb); | |
394 | rc = 0; | |
395 | } else { | |
396 | return rc; | |
397 | } | |
1da177e4 | 398 | |
1b12b9c1 SM |
399 | /* check for Minshall+French symlinks */ |
400 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) { | |
cb084b1a SP |
401 | int tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr, |
402 | full_path); | |
1b12b9c1 | 403 | if (tmprc) |
cb084b1a | 404 | cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc); |
1b12b9c1 SM |
405 | } |
406 | ||
0e4bbde9 | 407 | if (*pinode == NULL) { |
cc0bad75 | 408 | /* get new inode */ |
4065c802 | 409 | cifs_fill_uniqueid(sb, &fattr); |
cc0bad75 JL |
410 | *pinode = cifs_iget(sb, &fattr); |
411 | if (!*pinode) | |
0e4bbde9 | 412 | rc = -ENOMEM; |
cc0bad75 JL |
413 | } else { |
414 | /* we already have inode, update it */ | |
7196ac11 NA |
415 | |
416 | /* if uniqueid is different, return error */ | |
417 | if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM && | |
418 | CIFS_I(*pinode)->uniqueid != fattr.cf_uniqueid)) { | |
c82e5ac7 | 419 | CIFS_I(*pinode)->time = 0; /* force reval */ |
7196ac11 NA |
420 | rc = -ESTALE; |
421 | goto cgiiu_exit; | |
422 | } | |
423 | ||
424 | /* if filetype is different, return error */ | |
4d66952a | 425 | rc = cifs_fattr_to_inode(*pinode, &fattr); |
0e4bbde9 | 426 | } |
1da177e4 | 427 | |
7196ac11 | 428 | cgiiu_exit: |
1da177e4 LT |
429 | return rc; |
430 | } | |
431 | ||
0b8f18e3 | 432 | static int |
0360d605 | 433 | cifs_sfu_type(struct cifs_fattr *fattr, const char *path, |
6d5786a3 | 434 | struct cifs_sb_info *cifs_sb, unsigned int xid) |
d6e2f2a4 SF |
435 | { |
436 | int rc; | |
db8b631d | 437 | __u32 oplock; |
7ffec372 | 438 | struct tcon_link *tlink; |
96daf2b0 | 439 | struct cifs_tcon *tcon; |
d81b8a40 PS |
440 | struct cifs_fid fid; |
441 | struct cifs_open_parms oparms; | |
7c06514a | 442 | struct cifs_io_parms io_parms = {0}; |
86c96b4b | 443 | char buf[24]; |
d6e2f2a4 | 444 | unsigned int bytes_read; |
fb8c4b14 | 445 | char *pbuf; |
0360d605 | 446 | int buf_type = CIFS_NO_BUFFER; |
d6e2f2a4 SF |
447 | |
448 | pbuf = buf; | |
449 | ||
0b8f18e3 JL |
450 | fattr->cf_mode &= ~S_IFMT; |
451 | ||
452 | if (fattr->cf_eof == 0) { | |
453 | fattr->cf_mode |= S_IFIFO; | |
454 | fattr->cf_dtype = DT_FIFO; | |
d6e2f2a4 | 455 | return 0; |
0b8f18e3 JL |
456 | } else if (fattr->cf_eof < 8) { |
457 | fattr->cf_mode |= S_IFREG; | |
458 | fattr->cf_dtype = DT_REG; | |
d6e2f2a4 SF |
459 | return -EINVAL; /* EOPNOTSUPP? */ |
460 | } | |
50c2f753 | 461 | |
7ffec372 JL |
462 | tlink = cifs_sb_tlink(cifs_sb); |
463 | if (IS_ERR(tlink)) | |
464 | return PTR_ERR(tlink); | |
465 | tcon = tlink_tcon(tlink); | |
466 | ||
d81b8a40 PS |
467 | oparms.tcon = tcon; |
468 | oparms.cifs_sb = cifs_sb; | |
469 | oparms.desired_access = GENERIC_READ; | |
0f060936 | 470 | oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR); |
d81b8a40 PS |
471 | oparms.disposition = FILE_OPEN; |
472 | oparms.path = path; | |
473 | oparms.fid = &fid; | |
474 | oparms.reconnect = false; | |
475 | ||
db8b631d SF |
476 | if (tcon->ses->server->oplocks) |
477 | oplock = REQ_OPLOCK; | |
478 | else | |
479 | oplock = 0; | |
480 | rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, NULL); | |
0360d605 | 481 | if (rc) { |
db8b631d | 482 | cifs_dbg(FYI, "check sfu type of %s, open rc = %d\n", path, rc); |
0360d605 PS |
483 | cifs_put_tlink(tlink); |
484 | return rc; | |
485 | } | |
486 | ||
487 | /* Read header */ | |
d81b8a40 | 488 | io_parms.netfid = fid.netfid; |
0360d605 PS |
489 | io_parms.pid = current->tgid; |
490 | io_parms.tcon = tcon; | |
491 | io_parms.offset = 0; | |
492 | io_parms.length = 24; | |
493 | ||
db8b631d SF |
494 | rc = tcon->ses->server->ops->sync_read(xid, &fid, &io_parms, |
495 | &bytes_read, &pbuf, &buf_type); | |
0360d605 PS |
496 | if ((rc == 0) && (bytes_read >= 8)) { |
497 | if (memcmp("IntxBLK", pbuf, 8) == 0) { | |
498 | cifs_dbg(FYI, "Block device\n"); | |
499 | fattr->cf_mode |= S_IFBLK; | |
500 | fattr->cf_dtype = DT_BLK; | |
501 | if (bytes_read == 24) { | |
502 | /* we have enough to decode dev num */ | |
503 | __u64 mjr; /* major */ | |
504 | __u64 mnr; /* minor */ | |
505 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); | |
506 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); | |
507 | fattr->cf_rdev = MKDEV(mjr, mnr); | |
86c96b4b | 508 | } |
0360d605 PS |
509 | } else if (memcmp("IntxCHR", pbuf, 8) == 0) { |
510 | cifs_dbg(FYI, "Char device\n"); | |
511 | fattr->cf_mode |= S_IFCHR; | |
512 | fattr->cf_dtype = DT_CHR; | |
513 | if (bytes_read == 24) { | |
514 | /* we have enough to decode dev num */ | |
515 | __u64 mjr; /* major */ | |
516 | __u64 mnr; /* minor */ | |
517 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); | |
518 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); | |
519 | fattr->cf_rdev = MKDEV(mjr, mnr); | |
520 | } | |
521 | } else if (memcmp("IntxLNK", pbuf, 7) == 0) { | |
522 | cifs_dbg(FYI, "Symlink\n"); | |
523 | fattr->cf_mode |= S_IFLNK; | |
524 | fattr->cf_dtype = DT_LNK; | |
3020a1f5 | 525 | } else { |
0360d605 | 526 | fattr->cf_mode |= S_IFREG; /* file? */ |
0b8f18e3 | 527 | fattr->cf_dtype = DT_REG; |
0360d605 | 528 | rc = -EOPNOTSUPP; |
fb8c4b14 | 529 | } |
0360d605 PS |
530 | } else { |
531 | fattr->cf_mode |= S_IFREG; /* then it is a file */ | |
532 | fattr->cf_dtype = DT_REG; | |
533 | rc = -EOPNOTSUPP; /* or some unknown SFU type */ | |
d6e2f2a4 | 534 | } |
db8b631d SF |
535 | |
536 | tcon->ses->server->ops->close(xid, tcon, &fid); | |
7ffec372 | 537 | cifs_put_tlink(tlink); |
d6e2f2a4 | 538 | return rc; |
d6e2f2a4 SF |
539 | } |
540 | ||
9e294f1c SF |
541 | #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */ |
542 | ||
0b8f18e3 JL |
543 | /* |
544 | * Fetch mode bits as provided by SFU. | |
545 | * | |
546 | * FIXME: Doesn't this clobber the type bit we got from cifs_sfu_type ? | |
547 | */ | |
548 | static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path, | |
6d5786a3 | 549 | struct cifs_sb_info *cifs_sb, unsigned int xid) |
9e294f1c | 550 | { |
3020a1f5 | 551 | #ifdef CONFIG_CIFS_XATTR |
9e294f1c SF |
552 | ssize_t rc; |
553 | char ea_value[4]; | |
554 | __u32 mode; | |
7ffec372 | 555 | struct tcon_link *tlink; |
96daf2b0 | 556 | struct cifs_tcon *tcon; |
7ffec372 JL |
557 | |
558 | tlink = cifs_sb_tlink(cifs_sb); | |
559 | if (IS_ERR(tlink)) | |
560 | return PTR_ERR(tlink); | |
561 | tcon = tlink_tcon(tlink); | |
9e294f1c | 562 | |
d979f3b0 SF |
563 | if (tcon->ses->server->ops->query_all_EAs == NULL) { |
564 | cifs_put_tlink(tlink); | |
565 | return -EOPNOTSUPP; | |
566 | } | |
567 | ||
568 | rc = tcon->ses->server->ops->query_all_EAs(xid, tcon, path, | |
569 | "SETFILEBITS", ea_value, 4 /* size of buf */, | |
67b4c889 | 570 | cifs_sb); |
7ffec372 | 571 | cifs_put_tlink(tlink); |
4523cc30 | 572 | if (rc < 0) |
9e294f1c SF |
573 | return (int)rc; |
574 | else if (rc > 3) { | |
575 | mode = le32_to_cpu(*((__le32 *)ea_value)); | |
0b8f18e3 | 576 | fattr->cf_mode &= ~SFBITS_MASK; |
f96637be JP |
577 | cifs_dbg(FYI, "special bits 0%o org mode 0%o\n", |
578 | mode, fattr->cf_mode); | |
0b8f18e3 | 579 | fattr->cf_mode = (mode & SFBITS_MASK) | fattr->cf_mode; |
f96637be | 580 | cifs_dbg(FYI, "special mode bits 0%o\n", mode); |
9e294f1c | 581 | } |
0b8f18e3 JL |
582 | |
583 | return 0; | |
3020a1f5 SF |
584 | #else |
585 | return -EOPNOTSUPP; | |
586 | #endif | |
9e294f1c SF |
587 | } |
588 | ||
6a5f6592 SF |
589 | /* Fill a cifs_fattr struct with info from POSIX info struct */ |
590 | static void | |
591 | smb311_posix_info_to_fattr(struct cifs_fattr *fattr, struct smb311_posix_qinfo *info, | |
592 | struct super_block *sb, bool adjust_tz, bool symlink) | |
593 | { | |
594 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
595 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); | |
596 | ||
597 | memset(fattr, 0, sizeof(*fattr)); | |
598 | ||
599 | /* no fattr->flags to set */ | |
600 | fattr->cf_cifsattrs = le32_to_cpu(info->DosAttributes); | |
601 | fattr->cf_uniqueid = le64_to_cpu(info->Inode); | |
602 | ||
603 | if (info->LastAccessTime) | |
604 | fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); | |
605 | else | |
606 | ktime_get_coarse_real_ts64(&fattr->cf_atime); | |
607 | ||
608 | fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime); | |
609 | fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime); | |
610 | ||
611 | if (adjust_tz) { | |
612 | fattr->cf_ctime.tv_sec += tcon->ses->server->timeAdj; | |
613 | fattr->cf_mtime.tv_sec += tcon->ses->server->timeAdj; | |
614 | } | |
615 | ||
616 | fattr->cf_eof = le64_to_cpu(info->EndOfFile); | |
617 | fattr->cf_bytes = le64_to_cpu(info->AllocationSize); | |
618 | fattr->cf_createtime = le64_to_cpu(info->CreationTime); | |
619 | ||
620 | fattr->cf_nlink = le32_to_cpu(info->HardLinks); | |
621 | fattr->cf_mode = (umode_t) le32_to_cpu(info->Mode); | |
622 | /* The srv fs device id is overridden on network mount so setting rdev isn't needed here */ | |
623 | /* fattr->cf_rdev = le32_to_cpu(info->DeviceId); */ | |
624 | ||
625 | if (symlink) { | |
626 | fattr->cf_mode |= S_IFLNK; | |
627 | fattr->cf_dtype = DT_LNK; | |
628 | } else if (fattr->cf_cifsattrs & ATTR_DIRECTORY) { | |
629 | fattr->cf_mode |= S_IFDIR; | |
630 | fattr->cf_dtype = DT_DIR; | |
631 | } else { /* file */ | |
632 | fattr->cf_mode |= S_IFREG; | |
633 | fattr->cf_dtype = DT_REG; | |
634 | } | |
635 | /* else if reparse point ... TODO: add support for FIFO and blk dev; special file types */ | |
636 | ||
8401e936 RS |
637 | fattr->cf_uid = cifs_sb->ctx->linux_uid; /* TODO: map uid and gid from SID */ |
638 | fattr->cf_gid = cifs_sb->ctx->linux_gid; | |
6a5f6592 SF |
639 | |
640 | cifs_dbg(FYI, "POSIX query info: mode 0x%x uniqueid 0x%llx nlink %d\n", | |
641 | fattr->cf_mode, fattr->cf_uniqueid, fattr->cf_nlink); | |
642 | } | |
643 | ||
644 | ||
0b8f18e3 | 645 | /* Fill a cifs_fattr struct with info from FILE_ALL_INFO */ |
f1230c97 | 646 | static void |
0b8f18e3 | 647 | cifs_all_info_to_fattr(struct cifs_fattr *fattr, FILE_ALL_INFO *info, |
e37fea58 | 648 | struct super_block *sb, bool adjust_tz, |
2e4564b3 | 649 | bool symlink, u32 reparse_tag) |
b9a3260f | 650 | { |
e37fea58 | 651 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
96daf2b0 | 652 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
0d424ad0 | 653 | |
0b8f18e3 JL |
654 | memset(fattr, 0, sizeof(*fattr)); |
655 | fattr->cf_cifsattrs = le32_to_cpu(info->Attributes); | |
656 | if (info->DeletePending) | |
657 | fattr->cf_flags |= CIFS_FATTR_DELETE_PENDING; | |
658 | ||
659 | if (info->LastAccessTime) | |
660 | fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); | |
918c9009 DD |
661 | else |
662 | ktime_get_coarse_real_ts64(&fattr->cf_atime); | |
0b8f18e3 JL |
663 | |
664 | fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime); | |
665 | fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime); | |
666 | ||
667 | if (adjust_tz) { | |
0d424ad0 JL |
668 | fattr->cf_ctime.tv_sec += tcon->ses->server->timeAdj; |
669 | fattr->cf_mtime.tv_sec += tcon->ses->server->timeAdj; | |
0b8f18e3 JL |
670 | } |
671 | ||
672 | fattr->cf_eof = le64_to_cpu(info->EndOfFile); | |
673 | fattr->cf_bytes = le64_to_cpu(info->AllocationSize); | |
20054bd6 | 674 | fattr->cf_createtime = le64_to_cpu(info->CreationTime); |
0b8f18e3 | 675 | |
74d290da | 676 | fattr->cf_nlink = le32_to_cpu(info->NumberOfLinks); |
2e4564b3 | 677 | if (reparse_tag == IO_REPARSE_TAG_LX_SYMLINK) { |
8401e936 | 678 | fattr->cf_mode |= S_IFLNK | cifs_sb->ctx->file_mode; |
2e4564b3 SF |
679 | fattr->cf_dtype = DT_LNK; |
680 | } else if (reparse_tag == IO_REPARSE_TAG_LX_FIFO) { | |
8401e936 | 681 | fattr->cf_mode |= S_IFIFO | cifs_sb->ctx->file_mode; |
2e4564b3 SF |
682 | fattr->cf_dtype = DT_FIFO; |
683 | } else if (reparse_tag == IO_REPARSE_TAG_AF_UNIX) { | |
8401e936 | 684 | fattr->cf_mode |= S_IFSOCK | cifs_sb->ctx->file_mode; |
2e4564b3 SF |
685 | fattr->cf_dtype = DT_SOCK; |
686 | } else if (reparse_tag == IO_REPARSE_TAG_LX_CHR) { | |
8401e936 | 687 | fattr->cf_mode |= S_IFCHR | cifs_sb->ctx->file_mode; |
2e4564b3 SF |
688 | fattr->cf_dtype = DT_CHR; |
689 | } else if (reparse_tag == IO_REPARSE_TAG_LX_BLK) { | |
8401e936 | 690 | fattr->cf_mode |= S_IFBLK | cifs_sb->ctx->file_mode; |
2e4564b3 SF |
691 | fattr->cf_dtype = DT_BLK; |
692 | } else if (symlink) { /* TODO add more reparse tag checks */ | |
eb85d94b PS |
693 | fattr->cf_mode = S_IFLNK; |
694 | fattr->cf_dtype = DT_LNK; | |
695 | } else if (fattr->cf_cifsattrs & ATTR_DIRECTORY) { | |
8401e936 | 696 | fattr->cf_mode = S_IFDIR | cifs_sb->ctx->dir_mode; |
0b8f18e3 | 697 | fattr->cf_dtype = DT_DIR; |
6de2ce42 PS |
698 | /* |
699 | * Server can return wrong NumberOfLinks value for directories | |
700 | * when Unix extensions are disabled - fake it. | |
701 | */ | |
74d290da JM |
702 | if (!tcon->unix_ext) |
703 | fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK; | |
0b8f18e3 | 704 | } else { |
8401e936 | 705 | fattr->cf_mode = S_IFREG | cifs_sb->ctx->file_mode; |
0b8f18e3 | 706 | fattr->cf_dtype = DT_REG; |
0b8f18e3 | 707 | |
d0c280d2 JL |
708 | /* clear write bits if ATTR_READONLY is set */ |
709 | if (fattr->cf_cifsattrs & ATTR_READONLY) | |
710 | fattr->cf_mode &= ~(S_IWUGO); | |
0b8f18e3 | 711 | |
74d290da JM |
712 | /* |
713 | * Don't accept zero nlink from non-unix servers unless | |
714 | * delete is pending. Instead mark it as unknown. | |
715 | */ | |
716 | if ((fattr->cf_nlink < 1) && !tcon->unix_ext && | |
717 | !info->DeletePending) { | |
fb4b5f13 JP |
718 | cifs_dbg(VFS, "bogus file nlink value %u\n", |
719 | fattr->cf_nlink); | |
74d290da | 720 | fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK; |
6658b9f7 | 721 | } |
6de2ce42 | 722 | } |
0b8f18e3 | 723 | |
8401e936 RS |
724 | fattr->cf_uid = cifs_sb->ctx->linux_uid; |
725 | fattr->cf_gid = cifs_sb->ctx->linux_gid; | |
b9a3260f SF |
726 | } |
727 | ||
4ad65044 PS |
728 | static int |
729 | cifs_get_file_info(struct file *filp) | |
abab095d JL |
730 | { |
731 | int rc; | |
6d5786a3 | 732 | unsigned int xid; |
abab095d JL |
733 | FILE_ALL_INFO find_data; |
734 | struct cifs_fattr fattr; | |
496ad9aa | 735 | struct inode *inode = file_inode(filp); |
c21dfb69 | 736 | struct cifsFileInfo *cfile = filp->private_data; |
96daf2b0 | 737 | struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); |
4ad65044 PS |
738 | struct TCP_Server_Info *server = tcon->ses->server; |
739 | ||
740 | if (!server->ops->query_file_info) | |
741 | return -ENOSYS; | |
abab095d | 742 | |
6d5786a3 | 743 | xid = get_xid(); |
4ad65044 | 744 | rc = server->ops->query_file_info(xid, tcon, &cfile->fid, &find_data); |
42274bb2 PS |
745 | switch (rc) { |
746 | case 0: | |
2e4564b3 | 747 | /* TODO: add support to query reparse tag */ |
e37fea58 | 748 | cifs_all_info_to_fattr(&fattr, &find_data, inode->i_sb, false, |
2e4564b3 | 749 | false, 0 /* no reparse tag */); |
42274bb2 PS |
750 | break; |
751 | case -EREMOTE: | |
752 | cifs_create_dfs_fattr(&fattr, inode->i_sb); | |
753 | rc = 0; | |
754 | break; | |
755 | case -EOPNOTSUPP: | |
756 | case -EINVAL: | |
abab095d JL |
757 | /* |
758 | * FIXME: legacy server -- fall back to path-based call? | |
ff215713 SF |
759 | * for now, just skip revalidating and mark inode for |
760 | * immediate reval. | |
761 | */ | |
abab095d JL |
762 | rc = 0; |
763 | CIFS_I(inode)->time = 0; | |
21ac58f4 | 764 | goto cgfi_exit; |
42274bb2 | 765 | default: |
abab095d | 766 | goto cgfi_exit; |
42274bb2 | 767 | } |
abab095d JL |
768 | |
769 | /* | |
770 | * don't bother with SFU junk here -- just mark inode as needing | |
771 | * revalidation. | |
772 | */ | |
abab095d JL |
773 | fattr.cf_uniqueid = CIFS_I(inode)->uniqueid; |
774 | fattr.cf_flags |= CIFS_FATTR_NEED_REVAL; | |
4d66952a AV |
775 | /* if filetype is different, return error */ |
776 | rc = cifs_fattr_to_inode(inode, &fattr); | |
abab095d | 777 | cgfi_exit: |
6d5786a3 | 778 | free_xid(xid); |
abab095d JL |
779 | return rc; |
780 | } | |
781 | ||
7ea884c7 SF |
782 | /* Simple function to return a 64 bit hash of string. Rarely called */ |
783 | static __u64 simple_hashstr(const char *str) | |
784 | { | |
3995bbf5 | 785 | const __u64 hash_mult = 1125899906842597ULL; /* a big enough prime */ |
7ea884c7 SF |
786 | __u64 hash = 0; |
787 | ||
788 | while (*str) | |
789 | hash = (hash + (__u64) *str++) * hash_mult; | |
790 | ||
791 | return hash; | |
792 | } | |
793 | ||
b8f7442b AA |
794 | /** |
795 | * cifs_backup_query_path_info - SMB1 fallback code to get ino | |
796 | * | |
797 | * Fallback code to get file metadata when we don't have access to | |
607dfc79 | 798 | * full_path (EACCES) and have backup creds. |
b8f7442b | 799 | * |
607dfc79 SF |
800 | * @xid: transaction id used to identify original request in logs |
801 | * @tcon: information about the server share we have mounted | |
802 | * @sb: the superblock stores info such as disk space available | |
803 | * @full_path: name of the file we are getting the metadata for | |
804 | * @resp_buf: will be set to cifs resp buf and needs to be freed with | |
805 | * cifs_buf_release() when done with @data | |
806 | * @data: will be set to search info result buffer | |
b8f7442b AA |
807 | */ |
808 | static int | |
809 | cifs_backup_query_path_info(int xid, | |
810 | struct cifs_tcon *tcon, | |
811 | struct super_block *sb, | |
812 | const char *full_path, | |
813 | void **resp_buf, | |
814 | FILE_ALL_INFO **data) | |
815 | { | |
816 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
817 | struct cifs_search_info info = {0}; | |
818 | u16 flags; | |
819 | int rc; | |
820 | ||
821 | *resp_buf = NULL; | |
822 | info.endOfSearch = false; | |
823 | if (tcon->unix_ext) | |
824 | info.info_level = SMB_FIND_FILE_UNIX; | |
825 | else if ((tcon->ses->capabilities & | |
826 | tcon->ses->server->vals->cap_nt_find) == 0) | |
827 | info.info_level = SMB_FIND_FILE_INFO_STANDARD; | |
828 | else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
829 | info.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO; | |
830 | else /* no srvino useful for fallback to some netapp */ | |
831 | info.info_level = SMB_FIND_FILE_DIRECTORY_INFO; | |
832 | ||
833 | flags = CIFS_SEARCH_CLOSE_ALWAYS | | |
834 | CIFS_SEARCH_CLOSE_AT_END | | |
835 | CIFS_SEARCH_BACKUP_SEARCH; | |
836 | ||
837 | rc = CIFSFindFirst(xid, tcon, full_path, | |
838 | cifs_sb, NULL, flags, &info, false); | |
839 | if (rc) | |
840 | return rc; | |
841 | ||
842 | *resp_buf = (void *)info.ntwrk_buf_start; | |
843 | *data = (FILE_ALL_INFO *)info.srch_entries_start; | |
844 | return 0; | |
845 | } | |
846 | ||
847 | static void | |
848 | cifs_set_fattr_ino(int xid, | |
849 | struct cifs_tcon *tcon, | |
850 | struct super_block *sb, | |
851 | struct inode **inode, | |
852 | const char *full_path, | |
853 | FILE_ALL_INFO *data, | |
854 | struct cifs_fattr *fattr) | |
855 | { | |
856 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
857 | struct TCP_Server_Info *server = tcon->ses->server; | |
858 | int rc; | |
859 | ||
860 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) { | |
861 | if (*inode) | |
862 | fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid; | |
863 | else | |
864 | fattr->cf_uniqueid = iunique(sb, ROOT_I); | |
865 | return; | |
866 | } | |
867 | ||
868 | /* | |
869 | * If we have an inode pass a NULL tcon to ensure we don't | |
870 | * make a round trip to the server. This only works for SMB2+. | |
871 | */ | |
872 | rc = server->ops->get_srv_inum(xid, | |
873 | *inode ? NULL : tcon, | |
874 | cifs_sb, full_path, | |
875 | &fattr->cf_uniqueid, | |
876 | data); | |
877 | if (rc) { | |
878 | /* | |
879 | * If that fails reuse existing ino or generate one | |
880 | * and disable server ones | |
881 | */ | |
882 | if (*inode) | |
883 | fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid; | |
884 | else { | |
885 | fattr->cf_uniqueid = iunique(sb, ROOT_I); | |
886 | cifs_autodisable_serverino(cifs_sb); | |
887 | } | |
888 | return; | |
889 | } | |
890 | ||
891 | /* If no errors, check for zero root inode (invalid) */ | |
892 | if (fattr->cf_uniqueid == 0 && strlen(full_path) == 0) { | |
893 | cifs_dbg(FYI, "Invalid (0) inodenum\n"); | |
894 | if (*inode) { | |
895 | /* reuse */ | |
896 | fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid; | |
897 | } else { | |
898 | /* make an ino by hashing the UNC */ | |
899 | fattr->cf_flags |= CIFS_FATTR_FAKE_ROOT_INO; | |
900 | fattr->cf_uniqueid = simple_hashstr(tcon->treeName); | |
901 | } | |
902 | } | |
903 | } | |
904 | ||
905 | static inline bool is_inode_cache_good(struct inode *ino) | |
906 | { | |
907 | return ino && CIFS_CACHE_READ(CIFS_I(ino)) && CIFS_I(ino)->time != 0; | |
908 | } | |
909 | ||
1208ef1f | 910 | int |
b8f7442b AA |
911 | cifs_get_inode_info(struct inode **inode, |
912 | const char *full_path, | |
913 | FILE_ALL_INFO *in_data, | |
914 | struct super_block *sb, int xid, | |
42eacf9e | 915 | const struct cifs_fid *fid) |
1da177e4 | 916 | { |
b8f7442b | 917 | |
1208ef1f PS |
918 | struct cifs_tcon *tcon; |
919 | struct TCP_Server_Info *server; | |
7ffec372 | 920 | struct tcon_link *tlink; |
1da177e4 | 921 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
1208ef1f | 922 | bool adjust_tz = false; |
b8f7442b | 923 | struct cifs_fattr fattr = {0}; |
2e4564b3 | 924 | bool is_reparse_point = false; |
b8f7442b AA |
925 | FILE_ALL_INFO *data = in_data; |
926 | FILE_ALL_INFO *tmp_data = NULL; | |
927 | void *smb1_backup_rsp_buf = NULL; | |
928 | int rc = 0; | |
929 | int tmprc = 0; | |
2e4564b3 | 930 | __u32 reparse_tag = 0; |
1da177e4 | 931 | |
7ffec372 JL |
932 | tlink = cifs_sb_tlink(cifs_sb); |
933 | if (IS_ERR(tlink)) | |
934 | return PTR_ERR(tlink); | |
1208ef1f PS |
935 | tcon = tlink_tcon(tlink); |
936 | server = tcon->ses->server; | |
7ffec372 | 937 | |
b8f7442b AA |
938 | /* |
939 | * 1. Fetch file metadata if not provided (data) | |
940 | */ | |
1da177e4 | 941 | |
b8f7442b AA |
942 | if (!data) { |
943 | if (is_inode_cache_good(*inode)) { | |
f96637be | 944 | cifs_dbg(FYI, "No need to revalidate cached inode sizes\n"); |
b8f7442b | 945 | goto out; |
1da177e4 | 946 | } |
b8f7442b AA |
947 | tmp_data = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
948 | if (!tmp_data) { | |
7ffec372 | 949 | rc = -ENOMEM; |
b8f7442b | 950 | goto out; |
7ffec372 | 951 | } |
b8f7442b | 952 | rc = server->ops->query_path_info(xid, tcon, cifs_sb, |
2e4564b3 SF |
953 | full_path, tmp_data, |
954 | &adjust_tz, &is_reparse_point); | |
b8f7442b | 955 | data = tmp_data; |
1da177e4 | 956 | } |
0b8f18e3 | 957 | |
b8f7442b AA |
958 | /* |
959 | * 2. Convert it to internal cifs metadata (fattr) | |
960 | */ | |
961 | ||
962 | switch (rc) { | |
963 | case 0: | |
2e4564b3 SF |
964 | /* |
965 | * If the file is a reparse point, it is more complicated | |
966 | * since we have to check if its reparse tag matches a known | |
967 | * special file type e.g. symlink or fifo or char etc. | |
968 | */ | |
969 | if ((le32_to_cpu(data->Attributes) & ATTR_REPARSE) && | |
970 | server->ops->query_reparse_tag) { | |
971 | rc = server->ops->query_reparse_tag(xid, tcon, cifs_sb, | |
972 | full_path, &reparse_tag); | |
973 | cifs_dbg(FYI, "reparse tag 0x%x\n", reparse_tag); | |
974 | } | |
975 | cifs_all_info_to_fattr(&fattr, data, sb, adjust_tz, | |
976 | is_reparse_point, reparse_tag); | |
b8f7442b AA |
977 | break; |
978 | case -EREMOTE: | |
979 | /* DFS link, no metadata available on this server */ | |
0b8f18e3 | 980 | cifs_create_dfs_fattr(&fattr, sb); |
b9a3260f | 981 | rc = 0; |
b8f7442b AA |
982 | break; |
983 | case -EACCES: | |
3b7960ca | 984 | /* |
b8f7442b AA |
985 | * perm errors, try again with backup flags if possible |
986 | * | |
987 | * For SMB2 and later the backup intent flag | |
988 | * is already sent if needed on open and there | |
989 | * is no path based FindFirst operation to use | |
990 | * to retry with | |
3b7960ca | 991 | */ |
b8f7442b AA |
992 | if (backup_cred(cifs_sb) && is_smb1_server(server)) { |
993 | /* for easier reading */ | |
994 | FILE_DIRECTORY_INFO *fdi; | |
995 | SEARCH_ID_FULL_DIR_INFO *si; | |
996 | ||
997 | rc = cifs_backup_query_path_info(xid, tcon, sb, | |
998 | full_path, | |
999 | &smb1_backup_rsp_buf, | |
1000 | &data); | |
1001 | if (rc) | |
1002 | goto out; | |
1003 | ||
1004 | fdi = (FILE_DIRECTORY_INFO *)data; | |
1005 | si = (SEARCH_ID_FULL_DIR_INFO *)data; | |
1006 | ||
1007 | cifs_dir_info_to_fattr(&fattr, fdi, cifs_sb); | |
1008 | fattr.cf_uniqueid = le64_to_cpu(si->UniqueId); | |
1009 | /* uniqueid set, skip get inum step */ | |
1010 | goto handle_mnt_opt; | |
1011 | } else { | |
1012 | /* nothing we can do, bail out */ | |
1013 | goto out; | |
3b7960ca | 1014 | } |
b8f7442b AA |
1015 | break; |
1016 | default: | |
1017 | cifs_dbg(FYI, "%s: unhandled err rc %d\n", __func__, rc); | |
1018 | goto out; | |
1019 | } | |
c052e2b4 | 1020 | |
b8f7442b AA |
1021 | /* |
1022 | * 3. Get or update inode number (fattr.cf_uniqueid) | |
1023 | */ | |
1024 | ||
1025 | cifs_set_fattr_ino(xid, tcon, sb, inode, full_path, data, &fattr); | |
1da177e4 | 1026 | |
0b8f18e3 | 1027 | /* |
b8f7442b | 1028 | * 4. Tweak fattr based on mount options |
0b8f18e3 | 1029 | */ |
b9a3260f | 1030 | |
b8f7442b | 1031 | handle_mnt_opt: |
0b8f18e3 JL |
1032 | /* query for SFU type info if supported and needed */ |
1033 | if (fattr.cf_cifsattrs & ATTR_SYSTEM && | |
1034 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { | |
1035 | tmprc = cifs_sfu_type(&fattr, full_path, cifs_sb, xid); | |
1036 | if (tmprc) | |
f96637be | 1037 | cifs_dbg(FYI, "cifs_sfu_type failed: %d\n", tmprc); |
b9a3260f | 1038 | } |
1da177e4 | 1039 | |
b9a3260f | 1040 | /* fill in 0777 bits from ACL */ |
e2f8fbfb SF |
1041 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID) { |
1042 | rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, true, | |
1043 | full_path, fid); | |
01ec372c RS |
1044 | if (rc == -EREMOTE) |
1045 | rc = 0; | |
e2f8fbfb SF |
1046 | if (rc) { |
1047 | cifs_dbg(FYI, "%s: Get mode from SID failed. rc=%d\n", | |
b8f7442b AA |
1048 | __func__, rc); |
1049 | goto out; | |
e2f8fbfb SF |
1050 | } |
1051 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { | |
1052 | rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, false, | |
68464b88 | 1053 | full_path, fid); |
01ec372c RS |
1054 | if (rc == -EREMOTE) |
1055 | rc = 0; | |
68464b88 | 1056 | if (rc) { |
f96637be JP |
1057 | cifs_dbg(FYI, "%s: Getting ACL failed with error: %d\n", |
1058 | __func__, rc); | |
b8f7442b | 1059 | goto out; |
78415d2d | 1060 | } |
b9a3260f | 1061 | } |
b9a3260f | 1062 | |
0b8f18e3 JL |
1063 | /* fill in remaining high mode bits e.g. SUID, VTX */ |
1064 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) | |
1065 | cifs_sfu_mode(&fattr, full_path, cifs_sb, xid); | |
b9a3260f | 1066 | |
1b12b9c1 SM |
1067 | /* check for Minshall+French symlinks */ |
1068 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) { | |
cb084b1a SP |
1069 | tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr, |
1070 | full_path); | |
1b12b9c1 | 1071 | if (tmprc) |
cb084b1a | 1072 | cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc); |
1b12b9c1 SM |
1073 | } |
1074 | ||
b8f7442b AA |
1075 | /* |
1076 | * 5. Update inode with final fattr data | |
1077 | */ | |
1078 | ||
1208ef1f PS |
1079 | if (!*inode) { |
1080 | *inode = cifs_iget(sb, &fattr); | |
1081 | if (!*inode) | |
0b8f18e3 JL |
1082 | rc = -ENOMEM; |
1083 | } else { | |
7196ac11 NA |
1084 | /* we already have inode, update it */ |
1085 | ||
a108471b RL |
1086 | /* if uniqueid is different, return error */ |
1087 | if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM && | |
1088 | CIFS_I(*inode)->uniqueid != fattr.cf_uniqueid)) { | |
c82e5ac7 | 1089 | CIFS_I(*inode)->time = 0; /* force reval */ |
a108471b | 1090 | rc = -ESTALE; |
b8f7442b | 1091 | goto out; |
a108471b | 1092 | } |
7196ac11 | 1093 | /* if filetype is different, return error */ |
4d66952a | 1094 | rc = cifs_fattr_to_inode(*inode, &fattr); |
0b8f18e3 | 1095 | } |
b8f7442b AA |
1096 | out: |
1097 | cifs_buf_release(smb1_backup_rsp_buf); | |
7ffec372 | 1098 | cifs_put_tlink(tlink); |
b8f7442b | 1099 | kfree(tmp_data); |
1da177e4 LT |
1100 | return rc; |
1101 | } | |
1102 | ||
6a5f6592 SF |
1103 | int |
1104 | smb311_posix_get_inode_info(struct inode **inode, | |
1105 | const char *full_path, | |
1106 | struct super_block *sb, unsigned int xid) | |
1107 | { | |
1108 | struct cifs_tcon *tcon; | |
6a5f6592 SF |
1109 | struct tcon_link *tlink; |
1110 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
1111 | bool adjust_tz = false; | |
1112 | struct cifs_fattr fattr = {0}; | |
1113 | bool symlink = false; | |
1114 | struct smb311_posix_qinfo *data = NULL; | |
1115 | int rc = 0; | |
1116 | int tmprc = 0; | |
1117 | ||
1118 | tlink = cifs_sb_tlink(cifs_sb); | |
1119 | if (IS_ERR(tlink)) | |
1120 | return PTR_ERR(tlink); | |
1121 | tcon = tlink_tcon(tlink); | |
6a5f6592 SF |
1122 | |
1123 | /* | |
1124 | * 1. Fetch file metadata | |
1125 | */ | |
1126 | ||
1127 | if (is_inode_cache_good(*inode)) { | |
1128 | cifs_dbg(FYI, "No need to revalidate cached inode sizes\n"); | |
1129 | goto out; | |
1130 | } | |
1131 | data = kmalloc(sizeof(struct smb311_posix_qinfo), GFP_KERNEL); | |
1132 | if (!data) { | |
1133 | rc = -ENOMEM; | |
1134 | goto out; | |
1135 | } | |
1136 | ||
1137 | rc = smb311_posix_query_path_info(xid, tcon, cifs_sb, | |
1138 | full_path, data, | |
1139 | &adjust_tz, &symlink); | |
1140 | ||
1141 | /* | |
1142 | * 2. Convert it to internal cifs metadata (fattr) | |
1143 | */ | |
1144 | ||
1145 | switch (rc) { | |
1146 | case 0: | |
1147 | smb311_posix_info_to_fattr(&fattr, data, sb, adjust_tz, symlink); | |
1148 | break; | |
1149 | case -EREMOTE: | |
1150 | /* DFS link, no metadata available on this server */ | |
1151 | cifs_create_dfs_fattr(&fattr, sb); | |
1152 | rc = 0; | |
1153 | break; | |
1154 | case -EACCES: | |
1155 | /* | |
1156 | * For SMB2 and later the backup intent flag | |
1157 | * is already sent if needed on open and there | |
1158 | * is no path based FindFirst operation to use | |
1159 | * to retry with so nothing we can do, bail out | |
1160 | */ | |
1161 | goto out; | |
1162 | default: | |
1163 | cifs_dbg(FYI, "%s: unhandled err rc %d\n", __func__, rc); | |
1164 | goto out; | |
1165 | } | |
1166 | ||
1167 | ||
1168 | /* | |
a7a519a4 | 1169 | * 3. Tweak fattr based on mount options |
6a5f6592 SF |
1170 | */ |
1171 | ||
1172 | /* check for Minshall+French symlinks */ | |
1173 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) { | |
1174 | tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr, | |
1175 | full_path); | |
1176 | if (tmprc) | |
1177 | cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc); | |
1178 | } | |
1179 | ||
1180 | /* | |
a7a519a4 | 1181 | * 4. Update inode with final fattr data |
6a5f6592 SF |
1182 | */ |
1183 | ||
1184 | if (!*inode) { | |
1185 | *inode = cifs_iget(sb, &fattr); | |
1186 | if (!*inode) | |
1187 | rc = -ENOMEM; | |
1188 | } else { | |
1189 | /* we already have inode, update it */ | |
1190 | ||
1191 | /* if uniqueid is different, return error */ | |
1192 | if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM && | |
1193 | CIFS_I(*inode)->uniqueid != fattr.cf_uniqueid)) { | |
1194 | CIFS_I(*inode)->time = 0; /* force reval */ | |
1195 | rc = -ESTALE; | |
1196 | goto out; | |
1197 | } | |
1198 | ||
1199 | /* if filetype is different, return error */ | |
4d66952a | 1200 | rc = cifs_fattr_to_inode(*inode, &fattr); |
6a5f6592 SF |
1201 | } |
1202 | out: | |
1203 | cifs_put_tlink(tlink); | |
1204 | kfree(data); | |
1205 | return rc; | |
1206 | } | |
1207 | ||
1208 | ||
7f8ed420 SF |
1209 | static const struct inode_operations cifs_ipc_inode_ops = { |
1210 | .lookup = cifs_lookup, | |
1211 | }; | |
1212 | ||
cc0bad75 JL |
1213 | static int |
1214 | cifs_find_inode(struct inode *inode, void *opaque) | |
1215 | { | |
1216 | struct cifs_fattr *fattr = (struct cifs_fattr *) opaque; | |
1217 | ||
f30b9c11 | 1218 | /* don't match inode with different uniqueid */ |
cc0bad75 JL |
1219 | if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid) |
1220 | return 0; | |
1221 | ||
20054bd6 JL |
1222 | /* use createtime like an i_generation field */ |
1223 | if (CIFS_I(inode)->createtime != fattr->cf_createtime) | |
1224 | return 0; | |
1225 | ||
f30b9c11 | 1226 | /* don't match inode of different type */ |
6e3e2c43 | 1227 | if (inode_wrong_type(inode, fattr->cf_mode)) |
f30b9c11 JL |
1228 | return 0; |
1229 | ||
5acfec25 | 1230 | /* if it's not a directory or has no dentries, then flag it */ |
b3d9b7a3 | 1231 | if (S_ISDIR(inode->i_mode) && !hlist_empty(&inode->i_dentry)) |
3d694380 | 1232 | fattr->cf_flags |= CIFS_FATTR_INO_COLLISION; |
3d694380 | 1233 | |
cc0bad75 JL |
1234 | return 1; |
1235 | } | |
1236 | ||
1237 | static int | |
1238 | cifs_init_inode(struct inode *inode, void *opaque) | |
1239 | { | |
1240 | struct cifs_fattr *fattr = (struct cifs_fattr *) opaque; | |
1241 | ||
1242 | CIFS_I(inode)->uniqueid = fattr->cf_uniqueid; | |
20054bd6 | 1243 | CIFS_I(inode)->createtime = fattr->cf_createtime; |
cc0bad75 JL |
1244 | return 0; |
1245 | } | |
1246 | ||
5acfec25 JL |
1247 | /* |
1248 | * walk dentry list for an inode and report whether it has aliases that | |
1249 | * are hashed. We use this to determine if a directory inode can actually | |
1250 | * be used. | |
1251 | */ | |
1252 | static bool | |
1253 | inode_has_hashed_dentries(struct inode *inode) | |
1254 | { | |
1255 | struct dentry *dentry; | |
1256 | ||
873feea0 | 1257 | spin_lock(&inode->i_lock); |
946e51f2 | 1258 | hlist_for_each_entry(dentry, &inode->i_dentry, d_u.d_alias) { |
5acfec25 | 1259 | if (!d_unhashed(dentry) || IS_ROOT(dentry)) { |
873feea0 | 1260 | spin_unlock(&inode->i_lock); |
5acfec25 JL |
1261 | return true; |
1262 | } | |
1263 | } | |
873feea0 | 1264 | spin_unlock(&inode->i_lock); |
5acfec25 JL |
1265 | return false; |
1266 | } | |
1267 | ||
cc0bad75 JL |
1268 | /* Given fattrs, get a corresponding inode */ |
1269 | struct inode * | |
1270 | cifs_iget(struct super_block *sb, struct cifs_fattr *fattr) | |
1271 | { | |
1272 | unsigned long hash; | |
1273 | struct inode *inode; | |
1274 | ||
3d694380 | 1275 | retry_iget5_locked: |
f96637be | 1276 | cifs_dbg(FYI, "looking for uniqueid=%llu\n", fattr->cf_uniqueid); |
cc0bad75 JL |
1277 | |
1278 | /* hash down to 32-bits on 32-bit arch */ | |
1279 | hash = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid); | |
1280 | ||
1281 | inode = iget5_locked(sb, hash, cifs_find_inode, cifs_init_inode, fattr); | |
cc0bad75 | 1282 | if (inode) { |
5acfec25 | 1283 | /* was there a potentially problematic inode collision? */ |
3d694380 | 1284 | if (fattr->cf_flags & CIFS_FATTR_INO_COLLISION) { |
3d694380 | 1285 | fattr->cf_flags &= ~CIFS_FATTR_INO_COLLISION; |
5acfec25 JL |
1286 | |
1287 | if (inode_has_hashed_dentries(inode)) { | |
1288 | cifs_autodisable_serverino(CIFS_SB(sb)); | |
1289 | iput(inode); | |
1290 | fattr->cf_uniqueid = iunique(sb, ROOT_I); | |
1291 | goto retry_iget5_locked; | |
1292 | } | |
3d694380 JL |
1293 | } |
1294 | ||
4d66952a | 1295 | /* can't fail - see cifs_find_inode() */ |
cc0bad75 | 1296 | cifs_fattr_to_inode(inode, fattr); |
1751e8a6 | 1297 | if (sb->s_flags & SB_NOATIME) |
cc0bad75 JL |
1298 | inode->i_flags |= S_NOATIME | S_NOCMTIME; |
1299 | if (inode->i_state & I_NEW) { | |
1300 | inode->i_ino = hash; | |
0ccd4802 | 1301 | #ifdef CONFIG_CIFS_FSCACHE |
9451a9a5 SJ |
1302 | /* initialize per-inode cache cookie pointer */ |
1303 | CIFS_I(inode)->fscache = NULL; | |
0ccd4802 | 1304 | #endif |
cc0bad75 JL |
1305 | unlock_new_inode(inode); |
1306 | } | |
1307 | } | |
1308 | ||
1309 | return inode; | |
1310 | } | |
1311 | ||
1da177e4 | 1312 | /* gets root inode */ |
9b6763e0 | 1313 | struct inode *cifs_root_iget(struct super_block *sb) |
1da177e4 | 1314 | { |
6d5786a3 | 1315 | unsigned int xid; |
0d424ad0 | 1316 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
cc0bad75 | 1317 | struct inode *inode = NULL; |
ce634ab2 | 1318 | long rc; |
96daf2b0 | 1319 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
a6b5058f AA |
1320 | char *path = NULL; |
1321 | int len; | |
1322 | ||
1323 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH) | |
1324 | && cifs_sb->prepath) { | |
1325 | len = strlen(cifs_sb->prepath); | |
1326 | path = kzalloc(len + 2 /* leading sep + null */, GFP_KERNEL); | |
1327 | if (path == NULL) | |
1328 | return ERR_PTR(-ENOMEM); | |
1329 | path[0] = '/'; | |
1330 | memcpy(path+1, cifs_sb->prepath, len); | |
1331 | } else { | |
1332 | path = kstrdup("", GFP_KERNEL); | |
1333 | if (path == NULL) | |
1334 | return ERR_PTR(-ENOMEM); | |
1335 | } | |
ce634ab2 | 1336 | |
6d5786a3 | 1337 | xid = get_xid(); |
b5b374ea | 1338 | if (tcon->unix_ext) { |
a6b5058f | 1339 | rc = cifs_get_inode_info_unix(&inode, path, sb, xid); |
b5b374ea SF |
1340 | /* some servers mistakenly claim POSIX support */ |
1341 | if (rc != -EOPNOTSUPP) | |
1342 | goto iget_no_retry; | |
a0a3036b | 1343 | cifs_dbg(VFS, "server does not support POSIX extensions\n"); |
b5b374ea SF |
1344 | tcon->unix_ext = false; |
1345 | } | |
1346 | ||
a6b5058f | 1347 | convert_delimiter(path, CIFS_DIR_SEP(cifs_sb)); |
d313852d SF |
1348 | if (tcon->posix_extensions) |
1349 | rc = smb311_posix_get_inode_info(&inode, path, sb, xid); | |
1350 | else | |
1351 | rc = cifs_get_inode_info(&inode, path, NULL, sb, xid, NULL); | |
0b8f18e3 | 1352 | |
b5b374ea | 1353 | iget_no_retry: |
a7851ce7 OS |
1354 | if (!inode) { |
1355 | inode = ERR_PTR(rc); | |
1356 | goto out; | |
1357 | } | |
cc0bad75 | 1358 | |
0ccd4802 | 1359 | #ifdef CONFIG_CIFS_FSCACHE |
d03382ce | 1360 | /* populate tcon->resource_id */ |
0d424ad0 | 1361 | tcon->resource_id = CIFS_I(inode)->uniqueid; |
0ccd4802 | 1362 | #endif |
d03382ce | 1363 | |
b327a717 | 1364 | if (rc && tcon->pipe) { |
f96637be | 1365 | cifs_dbg(FYI, "ipc connection - fake read inode\n"); |
b7ca6928 | 1366 | spin_lock(&inode->i_lock); |
7f8ed420 | 1367 | inode->i_mode |= S_IFDIR; |
bfe86848 | 1368 | set_nlink(inode, 2); |
7f8ed420 SF |
1369 | inode->i_op = &cifs_ipc_inode_ops; |
1370 | inode->i_fop = &simple_dir_operations; | |
8401e936 RS |
1371 | inode->i_uid = cifs_sb->ctx->linux_uid; |
1372 | inode->i_gid = cifs_sb->ctx->linux_gid; | |
b7ca6928 | 1373 | spin_unlock(&inode->i_lock); |
ad661334 | 1374 | } else if (rc) { |
ce634ab2 | 1375 | iget_failed(inode); |
a7851ce7 | 1376 | inode = ERR_PTR(rc); |
7f8ed420 SF |
1377 | } |
1378 | ||
a7851ce7 | 1379 | out: |
a6b5058f | 1380 | kfree(path); |
31cd106b | 1381 | free_xid(xid); |
ce634ab2 | 1382 | return inode; |
1da177e4 LT |
1383 | } |
1384 | ||
ed6875e0 | 1385 | int |
6d5786a3 | 1386 | cifs_set_file_info(struct inode *inode, struct iattr *attrs, unsigned int xid, |
f6f1f179 | 1387 | const char *full_path, __u32 dosattr) |
388e57b2 | 1388 | { |
388e57b2 | 1389 | bool set_time = false; |
388e57b2 | 1390 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
6bdf6dbd | 1391 | struct TCP_Server_Info *server; |
388e57b2 SF |
1392 | FILE_BASIC_INFO info_buf; |
1393 | ||
1adcb710 SF |
1394 | if (attrs == NULL) |
1395 | return -EINVAL; | |
1396 | ||
6bdf6dbd PS |
1397 | server = cifs_sb_master_tcon(cifs_sb)->ses->server; |
1398 | if (!server->ops->set_file_info) | |
1399 | return -ENOSYS; | |
1400 | ||
fd09b7d3 SF |
1401 | info_buf.Pad = 0; |
1402 | ||
388e57b2 SF |
1403 | if (attrs->ia_valid & ATTR_ATIME) { |
1404 | set_time = true; | |
1405 | info_buf.LastAccessTime = | |
95390201 | 1406 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime)); |
388e57b2 SF |
1407 | } else |
1408 | info_buf.LastAccessTime = 0; | |
1409 | ||
1410 | if (attrs->ia_valid & ATTR_MTIME) { | |
1411 | set_time = true; | |
1412 | info_buf.LastWriteTime = | |
95390201 | 1413 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime)); |
388e57b2 SF |
1414 | } else |
1415 | info_buf.LastWriteTime = 0; | |
1416 | ||
1417 | /* | |
1418 | * Samba throws this field away, but windows may actually use it. | |
1419 | * Do not set ctime unless other time stamps are changed explicitly | |
1420 | * (i.e. by utimes()) since we would then have a mix of client and | |
1421 | * server times. | |
1422 | */ | |
1423 | if (set_time && (attrs->ia_valid & ATTR_CTIME)) { | |
f96637be | 1424 | cifs_dbg(FYI, "CIFS - CTIME changed\n"); |
388e57b2 | 1425 | info_buf.ChangeTime = |
95390201 | 1426 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime)); |
388e57b2 SF |
1427 | } else |
1428 | info_buf.ChangeTime = 0; | |
1429 | ||
1430 | info_buf.CreationTime = 0; /* don't change */ | |
1431 | info_buf.Attributes = cpu_to_le32(dosattr); | |
1432 | ||
6bdf6dbd | 1433 | return server->ops->set_file_info(inode, full_path, &info_buf, xid); |
388e57b2 SF |
1434 | } |
1435 | ||
a12a1ac7 | 1436 | /* |
ed6875e0 | 1437 | * Open the given file (if it isn't already), set the DELETE_ON_CLOSE bit |
a12a1ac7 JL |
1438 | * and rename it to a random name that hopefully won't conflict with |
1439 | * anything else. | |
1440 | */ | |
ed6875e0 PS |
1441 | int |
1442 | cifs_rename_pending_delete(const char *full_path, struct dentry *dentry, | |
1443 | const unsigned int xid) | |
a12a1ac7 JL |
1444 | { |
1445 | int oplock = 0; | |
1446 | int rc; | |
d81b8a40 PS |
1447 | struct cifs_fid fid; |
1448 | struct cifs_open_parms oparms; | |
2b0143b5 | 1449 | struct inode *inode = d_inode(dentry); |
a12a1ac7 JL |
1450 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
1451 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
7ffec372 | 1452 | struct tcon_link *tlink; |
96daf2b0 | 1453 | struct cifs_tcon *tcon; |
3270958b SF |
1454 | __u32 dosattr, origattr; |
1455 | FILE_BASIC_INFO *info_buf = NULL; | |
a12a1ac7 | 1456 | |
7ffec372 JL |
1457 | tlink = cifs_sb_tlink(cifs_sb); |
1458 | if (IS_ERR(tlink)) | |
1459 | return PTR_ERR(tlink); | |
1460 | tcon = tlink_tcon(tlink); | |
1461 | ||
c483a984 SP |
1462 | /* |
1463 | * We cannot rename the file if the server doesn't support | |
1464 | * CAP_INFOLEVEL_PASSTHRU | |
1465 | */ | |
1466 | if (!(tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)) { | |
1467 | rc = -EBUSY; | |
1468 | goto out; | |
1469 | } | |
1470 | ||
d81b8a40 PS |
1471 | oparms.tcon = tcon; |
1472 | oparms.cifs_sb = cifs_sb; | |
1473 | oparms.desired_access = DELETE | FILE_WRITE_ATTRIBUTES; | |
0f060936 | 1474 | oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR); |
d81b8a40 PS |
1475 | oparms.disposition = FILE_OPEN; |
1476 | oparms.path = full_path; | |
1477 | oparms.fid = &fid; | |
1478 | oparms.reconnect = false; | |
1479 | ||
1480 | rc = CIFS_open(xid, &oparms, &oplock, NULL); | |
a12a1ac7 JL |
1481 | if (rc != 0) |
1482 | goto out; | |
1483 | ||
3270958b SF |
1484 | origattr = cifsInode->cifsAttrs; |
1485 | if (origattr == 0) | |
1486 | origattr |= ATTR_NORMAL; | |
1487 | ||
1488 | dosattr = origattr & ~ATTR_READONLY; | |
a12a1ac7 JL |
1489 | if (dosattr == 0) |
1490 | dosattr |= ATTR_NORMAL; | |
1491 | dosattr |= ATTR_HIDDEN; | |
1492 | ||
3270958b SF |
1493 | /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */ |
1494 | if (dosattr != origattr) { | |
1495 | info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL); | |
1496 | if (info_buf == NULL) { | |
1497 | rc = -ENOMEM; | |
1498 | goto out_close; | |
1499 | } | |
1500 | info_buf->Attributes = cpu_to_le32(dosattr); | |
d81b8a40 | 1501 | rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid, |
3270958b SF |
1502 | current->tgid); |
1503 | /* although we would like to mark the file hidden | |
1504 | if that fails we will still try to rename it */ | |
72d282dc | 1505 | if (!rc) |
3270958b SF |
1506 | cifsInode->cifsAttrs = dosattr; |
1507 | else | |
1508 | dosattr = origattr; /* since not able to change them */ | |
a12a1ac7 | 1509 | } |
a12a1ac7 | 1510 | |
dd1db2de | 1511 | /* rename the file */ |
d81b8a40 PS |
1512 | rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, NULL, |
1513 | cifs_sb->local_nls, | |
2baa2682 | 1514 | cifs_remap(cifs_sb)); |
3270958b | 1515 | if (rc != 0) { |
47c78f4a | 1516 | rc = -EBUSY; |
3270958b SF |
1517 | goto undo_setattr; |
1518 | } | |
6d22f098 | 1519 | |
3270958b | 1520 | /* try to set DELETE_ON_CLOSE */ |
aff8d5ca | 1521 | if (!test_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags)) { |
d81b8a40 | 1522 | rc = CIFSSMBSetFileDisposition(xid, tcon, true, fid.netfid, |
3270958b SF |
1523 | current->tgid); |
1524 | /* | |
1525 | * some samba versions return -ENOENT when we try to set the | |
1526 | * file disposition here. Likely a samba bug, but work around | |
1527 | * it for now. This means that some cifsXXX files may hang | |
1528 | * around after they shouldn't. | |
1529 | * | |
1530 | * BB: remove this hack after more servers have the fix | |
1531 | */ | |
1532 | if (rc == -ENOENT) | |
1533 | rc = 0; | |
1534 | else if (rc != 0) { | |
47c78f4a | 1535 | rc = -EBUSY; |
3270958b SF |
1536 | goto undo_rename; |
1537 | } | |
aff8d5ca | 1538 | set_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags); |
3270958b | 1539 | } |
7ce86d5a | 1540 | |
a12a1ac7 | 1541 | out_close: |
d81b8a40 | 1542 | CIFSSMBClose(xid, tcon, fid.netfid); |
a12a1ac7 | 1543 | out: |
3270958b | 1544 | kfree(info_buf); |
7ffec372 | 1545 | cifs_put_tlink(tlink); |
a12a1ac7 | 1546 | return rc; |
3270958b SF |
1547 | |
1548 | /* | |
1549 | * reset everything back to the original state. Don't bother | |
1550 | * dealing with errors here since we can't do anything about | |
1551 | * them anyway. | |
1552 | */ | |
1553 | undo_rename: | |
d81b8a40 | 1554 | CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, dentry->d_name.name, |
2baa2682 | 1555 | cifs_sb->local_nls, cifs_remap(cifs_sb)); |
3270958b SF |
1556 | undo_setattr: |
1557 | if (dosattr != origattr) { | |
1558 | info_buf->Attributes = cpu_to_le32(origattr); | |
d81b8a40 | 1559 | if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid, |
3270958b SF |
1560 | current->tgid)) |
1561 | cifsInode->cifsAttrs = origattr; | |
1562 | } | |
1563 | ||
1564 | goto out_close; | |
a12a1ac7 JL |
1565 | } |
1566 | ||
b7ca6928 SF |
1567 | /* copied from fs/nfs/dir.c with small changes */ |
1568 | static void | |
1569 | cifs_drop_nlink(struct inode *inode) | |
1570 | { | |
1571 | spin_lock(&inode->i_lock); | |
1572 | if (inode->i_nlink > 0) | |
1573 | drop_nlink(inode); | |
1574 | spin_unlock(&inode->i_lock); | |
1575 | } | |
ff694527 SF |
1576 | |
1577 | /* | |
2b0143b5 | 1578 | * If d_inode(dentry) is null (usually meaning the cached dentry |
ff694527 | 1579 | * is a negative dentry) then we would attempt a standard SMB delete, but |
413d6100 CIK |
1580 | * if that fails we can not attempt the fall back mechanisms on EACCES |
1581 | * but will return the EACCES to the caller. Note that the VFS does not call | |
ff694527 SF |
1582 | * unlink on negative dentries currently. |
1583 | */ | |
5f0319a7 | 1584 | int cifs_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
1585 | { |
1586 | int rc = 0; | |
6d5786a3 | 1587 | unsigned int xid; |
f6a9bc33 AV |
1588 | const char *full_path; |
1589 | void *page; | |
2b0143b5 | 1590 | struct inode *inode = d_inode(dentry); |
ff694527 | 1591 | struct cifsInodeInfo *cifs_inode; |
5f0319a7 JL |
1592 | struct super_block *sb = dir->i_sb; |
1593 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
7ffec372 | 1594 | struct tcon_link *tlink; |
96daf2b0 | 1595 | struct cifs_tcon *tcon; |
ed6875e0 | 1596 | struct TCP_Server_Info *server; |
6050247d SF |
1597 | struct iattr *attrs = NULL; |
1598 | __u32 dosattr = 0, origattr = 0; | |
1da177e4 | 1599 | |
f96637be | 1600 | cifs_dbg(FYI, "cifs_unlink, dir=0x%p, dentry=0x%p\n", dir, dentry); |
1da177e4 | 1601 | |
087f757b SF |
1602 | if (unlikely(cifs_forced_shutdown(cifs_sb))) |
1603 | return -EIO; | |
1604 | ||
7ffec372 JL |
1605 | tlink = cifs_sb_tlink(cifs_sb); |
1606 | if (IS_ERR(tlink)) | |
1607 | return PTR_ERR(tlink); | |
1608 | tcon = tlink_tcon(tlink); | |
ed6875e0 | 1609 | server = tcon->ses->server; |
7ffec372 | 1610 | |
6d5786a3 | 1611 | xid = get_xid(); |
f6a9bc33 | 1612 | page = alloc_dentry_path(); |
1da177e4 | 1613 | |
82e9367c SF |
1614 | if (tcon->nodelete) { |
1615 | rc = -EACCES; | |
1616 | goto unlink_out; | |
1617 | } | |
1618 | ||
5f0319a7 JL |
1619 | /* Unlink can be called from rename so we can not take the |
1620 | * sb->s_vfs_rename_mutex here */ | |
f6a9bc33 AV |
1621 | full_path = build_path_from_dentry(dentry, page); |
1622 | if (IS_ERR(full_path)) { | |
1623 | rc = PTR_ERR(full_path); | |
7ffec372 | 1624 | goto unlink_out; |
1da177e4 | 1625 | } |
2d785a50 | 1626 | |
41535701 | 1627 | cifs_close_deferred_file(CIFS_I(inode)); |
29e20f9c PS |
1628 | if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
1629 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { | |
5f0319a7 | 1630 | rc = CIFSPOSIXDelFile(xid, tcon, full_path, |
2d785a50 | 1631 | SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls, |
2baa2682 | 1632 | cifs_remap(cifs_sb)); |
f96637be | 1633 | cifs_dbg(FYI, "posix del rc %d\n", rc); |
2d785a50 SF |
1634 | if ((rc == 0) || (rc == -ENOENT)) |
1635 | goto psx_del_no_retry; | |
1636 | } | |
1da177e4 | 1637 | |
6050247d | 1638 | retry_std_delete: |
ed6875e0 PS |
1639 | if (!server->ops->unlink) { |
1640 | rc = -ENOSYS; | |
1641 | goto psx_del_no_retry; | |
1642 | } | |
1643 | ||
1644 | rc = server->ops->unlink(xid, tcon, full_path, cifs_sb); | |
6050247d | 1645 | |
2d785a50 | 1646 | psx_del_no_retry: |
1da177e4 | 1647 | if (!rc) { |
5f0319a7 | 1648 | if (inode) |
b7ca6928 | 1649 | cifs_drop_nlink(inode); |
1da177e4 | 1650 | } else if (rc == -ENOENT) { |
5f0319a7 | 1651 | d_drop(dentry); |
47c78f4a | 1652 | } else if (rc == -EBUSY) { |
ed6875e0 PS |
1653 | if (server->ops->rename_pending_delete) { |
1654 | rc = server->ops->rename_pending_delete(full_path, | |
1655 | dentry, xid); | |
1656 | if (rc == 0) | |
1657 | cifs_drop_nlink(inode); | |
1658 | } | |
ff694527 | 1659 | } else if ((rc == -EACCES) && (dosattr == 0) && inode) { |
388e57b2 SF |
1660 | attrs = kzalloc(sizeof(*attrs), GFP_KERNEL); |
1661 | if (attrs == NULL) { | |
1662 | rc = -ENOMEM; | |
1663 | goto out_reval; | |
1da177e4 | 1664 | } |
388e57b2 SF |
1665 | |
1666 | /* try to reset dos attributes */ | |
ff694527 SF |
1667 | cifs_inode = CIFS_I(inode); |
1668 | origattr = cifs_inode->cifsAttrs; | |
6050247d SF |
1669 | if (origattr == 0) |
1670 | origattr |= ATTR_NORMAL; | |
1671 | dosattr = origattr & ~ATTR_READONLY; | |
388e57b2 SF |
1672 | if (dosattr == 0) |
1673 | dosattr |= ATTR_NORMAL; | |
1674 | dosattr |= ATTR_HIDDEN; | |
1675 | ||
1676 | rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); | |
388e57b2 SF |
1677 | if (rc != 0) |
1678 | goto out_reval; | |
6050247d SF |
1679 | |
1680 | goto retry_std_delete; | |
1da177e4 | 1681 | } |
6050247d SF |
1682 | |
1683 | /* undo the setattr if we errored out and it's needed */ | |
1684 | if (rc != 0 && dosattr != 0) | |
1685 | cifs_set_file_info(inode, attrs, xid, full_path, origattr); | |
1686 | ||
388e57b2 | 1687 | out_reval: |
4523cc30 | 1688 | if (inode) { |
ff694527 SF |
1689 | cifs_inode = CIFS_I(inode); |
1690 | cifs_inode->time = 0; /* will force revalidate to get info | |
5f0319a7 | 1691 | when needed */ |
e37fea58 | 1692 | inode->i_ctime = current_time(inode); |
06bcfedd | 1693 | } |
e37fea58 | 1694 | dir->i_ctime = dir->i_mtime = current_time(dir); |
ff694527 | 1695 | cifs_inode = CIFS_I(dir); |
6050247d | 1696 | CIFS_I(dir)->time = 0; /* force revalidate of dir as well */ |
7ffec372 | 1697 | unlink_out: |
f6a9bc33 | 1698 | free_dentry_path(page); |
6050247d | 1699 | kfree(attrs); |
6d5786a3 | 1700 | free_xid(xid); |
7ffec372 | 1701 | cifs_put_tlink(tlink); |
1da177e4 LT |
1702 | return rc; |
1703 | } | |
1704 | ||
ff691e96 | 1705 | static int |
101b92d9 | 1706 | cifs_mkdir_qinfo(struct inode *parent, struct dentry *dentry, umode_t mode, |
ff691e96 PS |
1707 | const char *full_path, struct cifs_sb_info *cifs_sb, |
1708 | struct cifs_tcon *tcon, const unsigned int xid) | |
1709 | { | |
1710 | int rc = 0; | |
101b92d9 | 1711 | struct inode *inode = NULL; |
ff691e96 | 1712 | |
d313852d SF |
1713 | if (tcon->posix_extensions) |
1714 | rc = smb311_posix_get_inode_info(&inode, full_path, parent->i_sb, xid); | |
1715 | else if (tcon->unix_ext) | |
101b92d9 | 1716 | rc = cifs_get_inode_info_unix(&inode, full_path, parent->i_sb, |
ff691e96 PS |
1717 | xid); |
1718 | else | |
101b92d9 JL |
1719 | rc = cifs_get_inode_info(&inode, full_path, NULL, parent->i_sb, |
1720 | xid, NULL); | |
1721 | ||
ff691e96 PS |
1722 | if (rc) |
1723 | return rc; | |
1724 | ||
3bcb39b0 AV |
1725 | if (!S_ISDIR(inode->i_mode)) { |
1726 | /* | |
1727 | * mkdir succeeded, but another client has managed to remove the | |
1728 | * sucker and replace it with non-directory. Return success, | |
1729 | * but don't leave the child in dcache. | |
1730 | */ | |
1731 | iput(inode); | |
1732 | d_drop(dentry); | |
1733 | return 0; | |
1734 | } | |
ff691e96 PS |
1735 | /* |
1736 | * setting nlink not necessary except in cases where we failed to get it | |
101b92d9 JL |
1737 | * from the server or was set bogus. Also, since this is a brand new |
1738 | * inode, no need to grab the i_lock before setting the i_nlink. | |
ff691e96 | 1739 | */ |
101b92d9 JL |
1740 | if (inode->i_nlink < 2) |
1741 | set_nlink(inode, 2); | |
ff691e96 PS |
1742 | mode &= ~current_umask(); |
1743 | /* must turn on setgid bit if parent dir has it */ | |
101b92d9 | 1744 | if (parent->i_mode & S_ISGID) |
ff691e96 PS |
1745 | mode |= S_ISGID; |
1746 | ||
1747 | if (tcon->unix_ext) { | |
1748 | struct cifs_unix_set_info_args args = { | |
1749 | .mode = mode, | |
1750 | .ctime = NO_CHANGE_64, | |
1751 | .atime = NO_CHANGE_64, | |
1752 | .mtime = NO_CHANGE_64, | |
1753 | .device = 0, | |
1754 | }; | |
1755 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { | |
49418b2c | 1756 | args.uid = current_fsuid(); |
101b92d9 | 1757 | if (parent->i_mode & S_ISGID) |
49418b2c | 1758 | args.gid = parent->i_gid; |
ff691e96 | 1759 | else |
49418b2c | 1760 | args.gid = current_fsgid(); |
ff691e96 | 1761 | } else { |
49418b2c EB |
1762 | args.uid = INVALID_UID; /* no change */ |
1763 | args.gid = INVALID_GID; /* no change */ | |
ff691e96 PS |
1764 | } |
1765 | CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args, | |
1766 | cifs_sb->local_nls, | |
2baa2682 | 1767 | cifs_remap(cifs_sb)); |
ff691e96 | 1768 | } else { |
f436720e | 1769 | struct TCP_Server_Info *server = tcon->ses->server; |
ff691e96 | 1770 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) && |
f436720e | 1771 | (mode & S_IWUGO) == 0 && server->ops->mkdir_setinfo) |
101b92d9 | 1772 | server->ops->mkdir_setinfo(inode, full_path, cifs_sb, |
f436720e | 1773 | tcon, xid); |
101b92d9 JL |
1774 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) |
1775 | inode->i_mode = (mode | S_IFDIR); | |
1776 | ||
1777 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { | |
1778 | inode->i_uid = current_fsuid(); | |
1779 | if (inode->i_mode & S_ISGID) | |
1780 | inode->i_gid = parent->i_gid; | |
1781 | else | |
1782 | inode->i_gid = current_fsgid(); | |
ff691e96 PS |
1783 | } |
1784 | } | |
101b92d9 | 1785 | d_instantiate(dentry, inode); |
3bcb39b0 | 1786 | return 0; |
ff691e96 PS |
1787 | } |
1788 | ||
1789 | static int | |
1790 | cifs_posix_mkdir(struct inode *inode, struct dentry *dentry, umode_t mode, | |
1791 | const char *full_path, struct cifs_sb_info *cifs_sb, | |
1792 | struct cifs_tcon *tcon, const unsigned int xid) | |
1793 | { | |
1794 | int rc = 0; | |
1795 | u32 oplock = 0; | |
1796 | FILE_UNIX_BASIC_INFO *info = NULL; | |
1797 | struct inode *newinode = NULL; | |
1798 | struct cifs_fattr fattr; | |
1799 | ||
1800 | info = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL); | |
1801 | if (info == NULL) { | |
1802 | rc = -ENOMEM; | |
1803 | goto posix_mkdir_out; | |
1804 | } | |
1805 | ||
1806 | mode &= ~current_umask(); | |
1807 | rc = CIFSPOSIXCreate(xid, tcon, SMB_O_DIRECTORY | SMB_O_CREAT, mode, | |
1808 | NULL /* netfid */, info, &oplock, full_path, | |
2baa2682 | 1809 | cifs_sb->local_nls, cifs_remap(cifs_sb)); |
ff691e96 PS |
1810 | if (rc == -EOPNOTSUPP) |
1811 | goto posix_mkdir_out; | |
1812 | else if (rc) { | |
f96637be | 1813 | cifs_dbg(FYI, "posix mkdir returned 0x%x\n", rc); |
ff691e96 PS |
1814 | d_drop(dentry); |
1815 | goto posix_mkdir_out; | |
1816 | } | |
1817 | ||
1818 | if (info->Type == cpu_to_le32(-1)) | |
1819 | /* no return info, go query for it */ | |
1820 | goto posix_mkdir_get_info; | |
1821 | /* | |
1822 | * BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if | |
1823 | * need to set uid/gid. | |
1824 | */ | |
1825 | ||
1826 | cifs_unix_basic_to_fattr(&fattr, info, cifs_sb); | |
1827 | cifs_fill_uniqueid(inode->i_sb, &fattr); | |
1828 | newinode = cifs_iget(inode->i_sb, &fattr); | |
1829 | if (!newinode) | |
1830 | goto posix_mkdir_get_info; | |
1831 | ||
1832 | d_instantiate(dentry, newinode); | |
1833 | ||
1834 | #ifdef CONFIG_CIFS_DEBUG2 | |
35c265e0 AV |
1835 | cifs_dbg(FYI, "instantiated dentry %p %pd to inode %p\n", |
1836 | dentry, dentry, newinode); | |
ff691e96 PS |
1837 | |
1838 | if (newinode->i_nlink != 2) | |
f96637be JP |
1839 | cifs_dbg(FYI, "unexpected number of links %d\n", |
1840 | newinode->i_nlink); | |
ff691e96 PS |
1841 | #endif |
1842 | ||
1843 | posix_mkdir_out: | |
1844 | kfree(info); | |
1845 | return rc; | |
1846 | posix_mkdir_get_info: | |
1847 | rc = cifs_mkdir_qinfo(inode, dentry, mode, full_path, cifs_sb, tcon, | |
1848 | xid); | |
1849 | goto posix_mkdir_out; | |
1850 | } | |
1851 | ||
549c7297 CB |
1852 | int cifs_mkdir(struct user_namespace *mnt_userns, struct inode *inode, |
1853 | struct dentry *direntry, umode_t mode) | |
1da177e4 | 1854 | { |
ff691e96 | 1855 | int rc = 0; |
6d5786a3 | 1856 | unsigned int xid; |
1da177e4 | 1857 | struct cifs_sb_info *cifs_sb; |
7ffec372 | 1858 | struct tcon_link *tlink; |
29e20f9c | 1859 | struct cifs_tcon *tcon; |
f436720e | 1860 | struct TCP_Server_Info *server; |
8e33cf20 | 1861 | const char *full_path; |
f6a9bc33 | 1862 | void *page; |
1da177e4 | 1863 | |
f52aa79d | 1864 | cifs_dbg(FYI, "In cifs_mkdir, mode = %04ho inode = 0x%p\n", |
f96637be | 1865 | mode, inode); |
1da177e4 | 1866 | |
1da177e4 | 1867 | cifs_sb = CIFS_SB(inode->i_sb); |
087f757b SF |
1868 | if (unlikely(cifs_forced_shutdown(cifs_sb))) |
1869 | return -EIO; | |
7ffec372 JL |
1870 | tlink = cifs_sb_tlink(cifs_sb); |
1871 | if (IS_ERR(tlink)) | |
1872 | return PTR_ERR(tlink); | |
29e20f9c | 1873 | tcon = tlink_tcon(tlink); |
7ffec372 | 1874 | |
6d5786a3 | 1875 | xid = get_xid(); |
1da177e4 | 1876 | |
f6a9bc33 AV |
1877 | page = alloc_dentry_path(); |
1878 | full_path = build_path_from_dentry(direntry, page); | |
1879 | if (IS_ERR(full_path)) { | |
1880 | rc = PTR_ERR(full_path); | |
7ffec372 | 1881 | goto mkdir_out; |
1da177e4 | 1882 | } |
50c2f753 | 1883 | |
bea851b8 SF |
1884 | server = tcon->ses->server; |
1885 | ||
bea851b8 SF |
1886 | if ((server->ops->posix_mkdir) && (tcon->posix_extensions)) { |
1887 | rc = server->ops->posix_mkdir(xid, inode, mode, tcon, full_path, | |
1888 | cifs_sb); | |
1889 | d_drop(direntry); /* for time being always refresh inode info */ | |
1890 | goto mkdir_out; | |
1891 | } | |
bea851b8 | 1892 | |
29e20f9c PS |
1893 | if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
1894 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { | |
ff691e96 PS |
1895 | rc = cifs_posix_mkdir(inode, direntry, mode, full_path, cifs_sb, |
1896 | tcon, xid); | |
1897 | if (rc != -EOPNOTSUPP) | |
2dd29d31 | 1898 | goto mkdir_out; |
fb8c4b14 | 1899 | } |
ff691e96 | 1900 | |
f436720e PS |
1901 | if (!server->ops->mkdir) { |
1902 | rc = -ENOSYS; | |
1903 | goto mkdir_out; | |
1904 | } | |
1905 | ||
1da177e4 | 1906 | /* BB add setting the equivalent of mode via CreateX w/ACLs */ |
c3ca78e2 | 1907 | rc = server->ops->mkdir(xid, inode, mode, tcon, full_path, cifs_sb); |
1da177e4 | 1908 | if (rc) { |
f96637be | 1909 | cifs_dbg(FYI, "cifs_mkdir returned 0x%x\n", rc); |
1da177e4 | 1910 | d_drop(direntry); |
ff691e96 | 1911 | goto mkdir_out; |
1da177e4 | 1912 | } |
ff691e96 | 1913 | |
c3ca78e2 | 1914 | /* TODO: skip this for smb2/smb3 */ |
ff691e96 PS |
1915 | rc = cifs_mkdir_qinfo(inode, direntry, mode, full_path, cifs_sb, tcon, |
1916 | xid); | |
fb8c4b14 | 1917 | mkdir_out: |
6de2ce42 PS |
1918 | /* |
1919 | * Force revalidate to get parent dir info when needed since cached | |
1920 | * attributes are invalid now. | |
1921 | */ | |
1922 | CIFS_I(inode)->time = 0; | |
f6a9bc33 | 1923 | free_dentry_path(page); |
6d5786a3 | 1924 | free_xid(xid); |
7ffec372 | 1925 | cifs_put_tlink(tlink); |
1da177e4 LT |
1926 | return rc; |
1927 | } | |
1928 | ||
1929 | int cifs_rmdir(struct inode *inode, struct dentry *direntry) | |
1930 | { | |
1931 | int rc = 0; | |
6d5786a3 | 1932 | unsigned int xid; |
1da177e4 | 1933 | struct cifs_sb_info *cifs_sb; |
7ffec372 | 1934 | struct tcon_link *tlink; |
f958ca5d PS |
1935 | struct cifs_tcon *tcon; |
1936 | struct TCP_Server_Info *server; | |
f6a9bc33 AV |
1937 | const char *full_path; |
1938 | void *page = alloc_dentry_path(); | |
1da177e4 LT |
1939 | struct cifsInodeInfo *cifsInode; |
1940 | ||
f96637be | 1941 | cifs_dbg(FYI, "cifs_rmdir, inode = 0x%p\n", inode); |
1da177e4 | 1942 | |
6d5786a3 | 1943 | xid = get_xid(); |
1da177e4 | 1944 | |
f6a9bc33 AV |
1945 | full_path = build_path_from_dentry(direntry, page); |
1946 | if (IS_ERR(full_path)) { | |
1947 | rc = PTR_ERR(full_path); | |
7ffec372 | 1948 | goto rmdir_exit; |
1da177e4 LT |
1949 | } |
1950 | ||
7ffec372 | 1951 | cifs_sb = CIFS_SB(inode->i_sb); |
087f757b SF |
1952 | if (unlikely(cifs_forced_shutdown(cifs_sb))) { |
1953 | rc = -EIO; | |
1954 | goto rmdir_exit; | |
1955 | } | |
1956 | ||
7ffec372 JL |
1957 | tlink = cifs_sb_tlink(cifs_sb); |
1958 | if (IS_ERR(tlink)) { | |
1959 | rc = PTR_ERR(tlink); | |
1960 | goto rmdir_exit; | |
1961 | } | |
f958ca5d PS |
1962 | tcon = tlink_tcon(tlink); |
1963 | server = tcon->ses->server; | |
1964 | ||
1965 | if (!server->ops->rmdir) { | |
1966 | rc = -ENOSYS; | |
1967 | cifs_put_tlink(tlink); | |
1968 | goto rmdir_exit; | |
1969 | } | |
7ffec372 | 1970 | |
82e9367c SF |
1971 | if (tcon->nodelete) { |
1972 | rc = -EACCES; | |
1973 | cifs_put_tlink(tlink); | |
1974 | goto rmdir_exit; | |
1975 | } | |
1976 | ||
f958ca5d | 1977 | rc = server->ops->rmdir(xid, tcon, full_path, cifs_sb); |
7ffec372 | 1978 | cifs_put_tlink(tlink); |
1da177e4 LT |
1979 | |
1980 | if (!rc) { | |
2b0143b5 DH |
1981 | spin_lock(&d_inode(direntry)->i_lock); |
1982 | i_size_write(d_inode(direntry), 0); | |
1983 | clear_nlink(d_inode(direntry)); | |
1984 | spin_unlock(&d_inode(direntry)->i_lock); | |
1da177e4 LT |
1985 | } |
1986 | ||
2b0143b5 | 1987 | cifsInode = CIFS_I(d_inode(direntry)); |
6de2ce42 PS |
1988 | /* force revalidate to go get info when needed */ |
1989 | cifsInode->time = 0; | |
42c24544 SF |
1990 | |
1991 | cifsInode = CIFS_I(inode); | |
6de2ce42 PS |
1992 | /* |
1993 | * Force revalidate to get parent dir info when needed since cached | |
1994 | * attributes are invalid now. | |
1995 | */ | |
1996 | cifsInode->time = 0; | |
42c24544 | 1997 | |
2b0143b5 | 1998 | d_inode(direntry)->i_ctime = inode->i_ctime = inode->i_mtime = |
e37fea58 | 1999 | current_time(inode); |
1da177e4 | 2000 | |
7ffec372 | 2001 | rmdir_exit: |
f6a9bc33 | 2002 | free_dentry_path(page); |
6d5786a3 | 2003 | free_xid(xid); |
1da177e4 LT |
2004 | return rc; |
2005 | } | |
2006 | ||
ee2fd967 | 2007 | static int |
8ceb9843 PS |
2008 | cifs_do_rename(const unsigned int xid, struct dentry *from_dentry, |
2009 | const char *from_path, struct dentry *to_dentry, | |
2010 | const char *to_path) | |
ee2fd967 SF |
2011 | { |
2012 | struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb); | |
7ffec372 | 2013 | struct tcon_link *tlink; |
8ceb9843 PS |
2014 | struct cifs_tcon *tcon; |
2015 | struct TCP_Server_Info *server; | |
d81b8a40 PS |
2016 | struct cifs_fid fid; |
2017 | struct cifs_open_parms oparms; | |
ee2fd967 SF |
2018 | int oplock, rc; |
2019 | ||
7ffec372 JL |
2020 | tlink = cifs_sb_tlink(cifs_sb); |
2021 | if (IS_ERR(tlink)) | |
2022 | return PTR_ERR(tlink); | |
8ceb9843 PS |
2023 | tcon = tlink_tcon(tlink); |
2024 | server = tcon->ses->server; | |
2025 | ||
2026 | if (!server->ops->rename) | |
2027 | return -ENOSYS; | |
7ffec372 | 2028 | |
ee2fd967 | 2029 | /* try path-based rename first */ |
8ceb9843 | 2030 | rc = server->ops->rename(xid, tcon, from_path, to_path, cifs_sb); |
ee2fd967 SF |
2031 | |
2032 | /* | |
8ceb9843 PS |
2033 | * Don't bother with rename by filehandle unless file is busy and |
2034 | * source. Note that cross directory moves do not work with | |
ee2fd967 SF |
2035 | * rename by filehandle to various Windows servers. |
2036 | */ | |
47c78f4a | 2037 | if (rc == 0 || rc != -EBUSY) |
7ffec372 | 2038 | goto do_rename_exit; |
ee2fd967 | 2039 | |
652727bb FS |
2040 | /* Don't fall back to using SMB on SMB 2+ mount */ |
2041 | if (server->vals->protocol_id != 0) | |
2042 | goto do_rename_exit; | |
2043 | ||
ed0e3ace JL |
2044 | /* open-file renames don't work across directories */ |
2045 | if (to_dentry->d_parent != from_dentry->d_parent) | |
7ffec372 | 2046 | goto do_rename_exit; |
ed0e3ace | 2047 | |
d81b8a40 PS |
2048 | oparms.tcon = tcon; |
2049 | oparms.cifs_sb = cifs_sb; | |
ee2fd967 | 2050 | /* open the file to be renamed -- we need DELETE perms */ |
d81b8a40 | 2051 | oparms.desired_access = DELETE; |
0f060936 | 2052 | oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR); |
d81b8a40 PS |
2053 | oparms.disposition = FILE_OPEN; |
2054 | oparms.path = from_path; | |
2055 | oparms.fid = &fid; | |
2056 | oparms.reconnect = false; | |
2057 | ||
2058 | rc = CIFS_open(xid, &oparms, &oplock, NULL); | |
ee2fd967 | 2059 | if (rc == 0) { |
d81b8a40 | 2060 | rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, |
ee2fd967 | 2061 | (const char *) to_dentry->d_name.name, |
2baa2682 | 2062 | cifs_sb->local_nls, cifs_remap(cifs_sb)); |
d81b8a40 | 2063 | CIFSSMBClose(xid, tcon, fid.netfid); |
ee2fd967 | 2064 | } |
7ffec372 | 2065 | do_rename_exit: |
c7e9f78f SF |
2066 | if (rc == 0) |
2067 | d_move(from_dentry, to_dentry); | |
7ffec372 | 2068 | cifs_put_tlink(tlink); |
ee2fd967 SF |
2069 | return rc; |
2070 | } | |
2071 | ||
8ceb9843 | 2072 | int |
549c7297 CB |
2073 | cifs_rename2(struct user_namespace *mnt_userns, struct inode *source_dir, |
2074 | struct dentry *source_dentry, struct inode *target_dir, | |
2075 | struct dentry *target_dentry, unsigned int flags) | |
1da177e4 | 2076 | { |
f6a9bc33 AV |
2077 | const char *from_name, *to_name; |
2078 | void *page1, *page2; | |
639e7a91 | 2079 | struct cifs_sb_info *cifs_sb; |
7ffec372 | 2080 | struct tcon_link *tlink; |
96daf2b0 | 2081 | struct cifs_tcon *tcon; |
ee2fd967 SF |
2082 | FILE_UNIX_BASIC_INFO *info_buf_source = NULL; |
2083 | FILE_UNIX_BASIC_INFO *info_buf_target; | |
6d5786a3 PS |
2084 | unsigned int xid; |
2085 | int rc, tmprc; | |
41535701 | 2086 | int retry_count = 0; |
1da177e4 | 2087 | |
7c33d597 MS |
2088 | if (flags & ~RENAME_NOREPLACE) |
2089 | return -EINVAL; | |
2090 | ||
639e7a91 | 2091 | cifs_sb = CIFS_SB(source_dir->i_sb); |
087f757b SF |
2092 | if (unlikely(cifs_forced_shutdown(cifs_sb))) |
2093 | return -EIO; | |
2094 | ||
7ffec372 JL |
2095 | tlink = cifs_sb_tlink(cifs_sb); |
2096 | if (IS_ERR(tlink)) | |
2097 | return PTR_ERR(tlink); | |
2098 | tcon = tlink_tcon(tlink); | |
1da177e4 | 2099 | |
f6a9bc33 AV |
2100 | page1 = alloc_dentry_path(); |
2101 | page2 = alloc_dentry_path(); | |
6d5786a3 | 2102 | xid = get_xid(); |
ee2fd967 | 2103 | |
f6a9bc33 AV |
2104 | from_name = build_path_from_dentry(source_dentry, page1); |
2105 | if (IS_ERR(from_name)) { | |
2106 | rc = PTR_ERR(from_name); | |
ee2fd967 SF |
2107 | goto cifs_rename_exit; |
2108 | } | |
2109 | ||
f6a9bc33 AV |
2110 | to_name = build_path_from_dentry(target_dentry, page2); |
2111 | if (IS_ERR(to_name)) { | |
2112 | rc = PTR_ERR(to_name); | |
1da177e4 LT |
2113 | goto cifs_rename_exit; |
2114 | } | |
2115 | ||
41535701 RS |
2116 | cifs_close_deferred_file(CIFS_I(d_inode(source_dentry))); |
2117 | if (d_inode(target_dentry) != NULL) | |
2118 | cifs_close_deferred_file(CIFS_I(d_inode(target_dentry))); | |
2119 | ||
8ceb9843 PS |
2120 | rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry, |
2121 | to_name); | |
ee2fd967 | 2122 | |
41535701 RS |
2123 | if (rc == -EACCES) { |
2124 | while (retry_count < 3) { | |
2125 | cifs_close_all_deferred_files(tcon); | |
2126 | rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry, | |
2127 | to_name); | |
2128 | if (rc != -EACCES) | |
2129 | break; | |
2130 | retry_count++; | |
2131 | } | |
2132 | } | |
2133 | ||
7c33d597 MS |
2134 | /* |
2135 | * No-replace is the natural behavior for CIFS, so skip unlink hacks. | |
2136 | */ | |
2137 | if (flags & RENAME_NOREPLACE) | |
2138 | goto cifs_rename_exit; | |
2139 | ||
14121bdc JL |
2140 | if (rc == -EEXIST && tcon->unix_ext) { |
2141 | /* | |
8ceb9843 PS |
2142 | * Are src and dst hardlinks of same inode? We can only tell |
2143 | * with unix extensions enabled. | |
14121bdc JL |
2144 | */ |
2145 | info_buf_source = | |
6da2ec56 | 2146 | kmalloc_array(2, sizeof(FILE_UNIX_BASIC_INFO), |
14121bdc JL |
2147 | GFP_KERNEL); |
2148 | if (info_buf_source == NULL) { | |
2149 | rc = -ENOMEM; | |
2150 | goto cifs_rename_exit; | |
2151 | } | |
2152 | ||
2153 | info_buf_target = info_buf_source + 1; | |
8ceb9843 PS |
2154 | tmprc = CIFSSMBUnixQPathInfo(xid, tcon, from_name, |
2155 | info_buf_source, | |
2156 | cifs_sb->local_nls, | |
2baa2682 | 2157 | cifs_remap(cifs_sb)); |
8d281efb | 2158 | if (tmprc != 0) |
14121bdc | 2159 | goto unlink_target; |
ee2fd967 | 2160 | |
8ceb9843 PS |
2161 | tmprc = CIFSSMBUnixQPathInfo(xid, tcon, to_name, |
2162 | info_buf_target, | |
2163 | cifs_sb->local_nls, | |
2baa2682 | 2164 | cifs_remap(cifs_sb)); |
14121bdc | 2165 | |
8d281efb | 2166 | if (tmprc == 0 && (info_buf_source->UniqueId == |
ae6884a9 | 2167 | info_buf_target->UniqueId)) { |
14121bdc | 2168 | /* same file, POSIX says that this is a noop */ |
ae6884a9 | 2169 | rc = 0; |
14121bdc | 2170 | goto cifs_rename_exit; |
ae6884a9 | 2171 | } |
8ceb9843 PS |
2172 | } |
2173 | /* | |
2174 | * else ... BB we could add the same check for Windows by | |
2175 | * checking the UniqueId via FILE_INTERNAL_INFO | |
2176 | */ | |
14121bdc | 2177 | |
ee2fd967 | 2178 | unlink_target: |
0e670518 SF |
2179 | /* Try unlinking the target dentry if it's not negative */ |
2180 | if (d_really_is_positive(target_dentry) && (rc == -EACCES || rc == -EEXIST)) { | |
a07d3220 PS |
2181 | if (d_is_dir(target_dentry)) |
2182 | tmprc = cifs_rmdir(target_dir, target_dentry); | |
2183 | else | |
2184 | tmprc = cifs_unlink(target_dir, target_dentry); | |
14121bdc JL |
2185 | if (tmprc) |
2186 | goto cifs_rename_exit; | |
8ceb9843 PS |
2187 | rc = cifs_do_rename(xid, source_dentry, from_name, |
2188 | target_dentry, to_name); | |
1da177e4 LT |
2189 | } |
2190 | ||
b46799a8 PS |
2191 | /* force revalidate to go get info when needed */ |
2192 | CIFS_I(source_dir)->time = CIFS_I(target_dir)->time = 0; | |
2193 | ||
2194 | source_dir->i_ctime = source_dir->i_mtime = target_dir->i_ctime = | |
e37fea58 | 2195 | target_dir->i_mtime = current_time(source_dir); |
b46799a8 | 2196 | |
1da177e4 | 2197 | cifs_rename_exit: |
ee2fd967 | 2198 | kfree(info_buf_source); |
f6a9bc33 AV |
2199 | free_dentry_path(page2); |
2200 | free_dentry_path(page1); | |
6d5786a3 | 2201 | free_xid(xid); |
7ffec372 | 2202 | cifs_put_tlink(tlink); |
1da177e4 LT |
2203 | return rc; |
2204 | } | |
2205 | ||
df2cf170 | 2206 | static bool |
ed8561fa | 2207 | cifs_dentry_needs_reval(struct dentry *dentry) |
1da177e4 | 2208 | { |
ed8561fa | 2209 | struct inode *inode = d_inode(dentry); |
df2cf170 | 2210 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
6d20e840 | 2211 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
f6d2353a RS |
2212 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
2213 | struct cached_fid *cfid = NULL; | |
1da177e4 | 2214 | |
57c55cd7 RS |
2215 | if (cifs_i->time == 0) |
2216 | return true; | |
2217 | ||
18cceb6a | 2218 | if (CIFS_CACHE_READ(cifs_i)) |
df2cf170 | 2219 | return false; |
1da177e4 | 2220 | |
df2cf170 JL |
2221 | if (!lookupCacheEnabled) |
2222 | return true; | |
1da177e4 | 2223 | |
f6d2353a RS |
2224 | if (!open_cached_dir_by_dentry(tcon, dentry->d_parent, &cfid)) { |
2225 | mutex_lock(&cfid->fid_mutex); | |
2226 | if (cfid->time && cifs_i->time > cfid->time) { | |
2227 | mutex_unlock(&cfid->fid_mutex); | |
2228 | close_cached_dir(cfid); | |
2229 | return false; | |
2230 | } | |
2231 | mutex_unlock(&cfid->fid_mutex); | |
2232 | close_cached_dir(cfid); | |
2233 | } | |
ddaf6d4a SF |
2234 | /* |
2235 | * depending on inode type, check if attribute caching disabled for | |
2236 | * files or directories | |
2237 | */ | |
2238 | if (S_ISDIR(inode->i_mode)) { | |
2239 | if (!cifs_sb->ctx->acdirmax) | |
2240 | return true; | |
2241 | if (!time_in_range(jiffies, cifs_i->time, | |
2242 | cifs_i->time + cifs_sb->ctx->acdirmax)) | |
2243 | return true; | |
2244 | } else { /* file */ | |
57804646 | 2245 | if (!cifs_sb->ctx->acregmax) |
ddaf6d4a SF |
2246 | return true; |
2247 | if (!time_in_range(jiffies, cifs_i->time, | |
57804646 | 2248 | cifs_i->time + cifs_sb->ctx->acregmax)) |
ddaf6d4a SF |
2249 | return true; |
2250 | } | |
df2cf170 | 2251 | |
db19272e | 2252 | /* hardlinked files w/ noserverino get "special" treatment */ |
6d20e840 | 2253 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) && |
db19272e JL |
2254 | S_ISREG(inode->i_mode) && inode->i_nlink != 1) |
2255 | return true; | |
2256 | ||
df2cf170 JL |
2257 | return false; |
2258 | } | |
2259 | ||
523fb8c8 SJ |
2260 | /* |
2261 | * Zap the cache. Called when invalid_mapping flag is set. | |
2262 | */ | |
6feb9891 | 2263 | int |
df2cf170 JL |
2264 | cifs_invalidate_mapping(struct inode *inode) |
2265 | { | |
6feb9891 | 2266 | int rc = 0; |
df2cf170 | 2267 | |
df2cf170 | 2268 | if (inode->i_mapping && inode->i_mapping->nrpages != 0) { |
257fb1f1 | 2269 | rc = invalidate_inode_pages2(inode->i_mapping); |
4f73c7d3 | 2270 | if (rc) |
a0a3036b | 2271 | cifs_dbg(VFS, "%s: Could not invalidate inode %p\n", |
f96637be | 2272 | __func__, inode); |
df2cf170 | 2273 | } |
257fb1f1 | 2274 | |
9451a9a5 | 2275 | cifs_fscache_reset_inode_cookie(inode); |
6feb9891 | 2276 | return rc; |
df2cf170 JL |
2277 | } |
2278 | ||
4f73c7d3 JL |
2279 | /** |
2280 | * cifs_wait_bit_killable - helper for functions that are sleeping on bit locks | |
607dfc79 SF |
2281 | * |
2282 | * @key: currently unused | |
2283 | * @mode: the task state to sleep in | |
4f73c7d3 JL |
2284 | */ |
2285 | static int | |
dfd01f02 | 2286 | cifs_wait_bit_killable(struct wait_bit_key *key, int mode) |
4f73c7d3 | 2287 | { |
4f73c7d3 | 2288 | freezable_schedule_unsafe(); |
dfd01f02 PZ |
2289 | if (signal_pending_state(mode, current)) |
2290 | return -ERESTARTSYS; | |
4f73c7d3 JL |
2291 | return 0; |
2292 | } | |
2293 | ||
e284e53f JL |
2294 | int |
2295 | cifs_revalidate_mapping(struct inode *inode) | |
2296 | { | |
4f73c7d3 JL |
2297 | int rc; |
2298 | unsigned long *flags = &CIFS_I(inode)->flags; | |
18d04062 | 2299 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
4f73c7d3 | 2300 | |
4e8aea30 SF |
2301 | /* swapfiles are not supposed to be shared */ |
2302 | if (IS_SWAPFILE(inode)) | |
2303 | return 0; | |
2304 | ||
74316201 N |
2305 | rc = wait_on_bit_lock_action(flags, CIFS_INO_LOCK, cifs_wait_bit_killable, |
2306 | TASK_KILLABLE); | |
4f73c7d3 JL |
2307 | if (rc) |
2308 | return rc; | |
2309 | ||
2310 | if (test_and_clear_bit(CIFS_INO_INVALID_MAPPING, flags)) { | |
18d04062 SP |
2311 | /* for cache=singleclient, do not invalidate */ |
2312 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RW_CACHE) | |
2313 | goto skip_invalidate; | |
2314 | ||
4f73c7d3 JL |
2315 | rc = cifs_invalidate_mapping(inode); |
2316 | if (rc) | |
2317 | set_bit(CIFS_INO_INVALID_MAPPING, flags); | |
2318 | } | |
2319 | ||
18d04062 | 2320 | skip_invalidate: |
4f73c7d3 | 2321 | clear_bit_unlock(CIFS_INO_LOCK, flags); |
b1cce803 | 2322 | smp_mb__after_atomic(); |
4f73c7d3 JL |
2323 | wake_up_bit(flags, CIFS_INO_LOCK); |
2324 | ||
2325 | return rc; | |
2326 | } | |
2327 | ||
2328 | int | |
2329 | cifs_zap_mapping(struct inode *inode) | |
2330 | { | |
2331 | set_bit(CIFS_INO_INVALID_MAPPING, &CIFS_I(inode)->flags); | |
2332 | return cifs_revalidate_mapping(inode); | |
e284e53f JL |
2333 | } |
2334 | ||
6feb9891 | 2335 | int cifs_revalidate_file_attr(struct file *filp) |
abab095d JL |
2336 | { |
2337 | int rc = 0; | |
ed8561fa | 2338 | struct dentry *dentry = file_dentry(filp); |
ba00ba64 | 2339 | struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data; |
abab095d | 2340 | |
ed8561fa | 2341 | if (!cifs_dentry_needs_reval(dentry)) |
6feb9891 | 2342 | return rc; |
abab095d | 2343 | |
13cfb733 | 2344 | if (tlink_tcon(cfile->tlink)->unix_ext) |
abab095d JL |
2345 | rc = cifs_get_file_info_unix(filp); |
2346 | else | |
2347 | rc = cifs_get_file_info(filp); | |
2348 | ||
abab095d JL |
2349 | return rc; |
2350 | } | |
2351 | ||
6feb9891 | 2352 | int cifs_revalidate_dentry_attr(struct dentry *dentry) |
df2cf170 | 2353 | { |
6d5786a3 | 2354 | unsigned int xid; |
df2cf170 | 2355 | int rc = 0; |
2b0143b5 | 2356 | struct inode *inode = d_inode(dentry); |
df2cf170 | 2357 | struct super_block *sb = dentry->d_sb; |
f6a9bc33 AV |
2358 | const char *full_path; |
2359 | void *page; | |
fc513fac | 2360 | int count = 0; |
df2cf170 JL |
2361 | |
2362 | if (inode == NULL) | |
2363 | return -ENOENT; | |
1da177e4 | 2364 | |
ed8561fa | 2365 | if (!cifs_dentry_needs_reval(dentry)) |
6feb9891 PS |
2366 | return rc; |
2367 | ||
6d5786a3 | 2368 | xid = get_xid(); |
1da177e4 | 2369 | |
f6a9bc33 AV |
2370 | page = alloc_dentry_path(); |
2371 | full_path = build_path_from_dentry(dentry, page); | |
2372 | if (IS_ERR(full_path)) { | |
2373 | rc = PTR_ERR(full_path); | |
6feb9891 | 2374 | goto out; |
1da177e4 LT |
2375 | } |
2376 | ||
f96637be JP |
2377 | cifs_dbg(FYI, "Update attributes: %s inode 0x%p count %d dentry: 0x%p d_time %ld jiffies %ld\n", |
2378 | full_path, inode, inode->i_count.counter, | |
a00be0e3 | 2379 | dentry, cifs_get_time(dentry), jiffies); |
1da177e4 | 2380 | |
fc513fac | 2381 | again: |
6a5f6592 SF |
2382 | if (cifs_sb_master_tcon(CIFS_SB(sb))->posix_extensions) |
2383 | rc = smb311_posix_get_inode_info(&inode, full_path, sb, xid); | |
2384 | else if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext) | |
df2cf170 JL |
2385 | rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid); |
2386 | else | |
2387 | rc = cifs_get_inode_info(&inode, full_path, NULL, sb, | |
2388 | xid, NULL); | |
fc513fac RS |
2389 | if (rc == -EAGAIN && count++ < 10) |
2390 | goto again; | |
6feb9891 | 2391 | out: |
f6a9bc33 | 2392 | free_dentry_path(page); |
6d5786a3 | 2393 | free_xid(xid); |
fc513fac | 2394 | |
1da177e4 LT |
2395 | return rc; |
2396 | } | |
2397 | ||
6feb9891 PS |
2398 | int cifs_revalidate_file(struct file *filp) |
2399 | { | |
2400 | int rc; | |
496ad9aa | 2401 | struct inode *inode = file_inode(filp); |
6feb9891 PS |
2402 | |
2403 | rc = cifs_revalidate_file_attr(filp); | |
2404 | if (rc) | |
2405 | return rc; | |
2406 | ||
e284e53f | 2407 | return cifs_revalidate_mapping(inode); |
6feb9891 PS |
2408 | } |
2409 | ||
2410 | /* revalidate a dentry's inode attributes */ | |
2411 | int cifs_revalidate_dentry(struct dentry *dentry) | |
2412 | { | |
2413 | int rc; | |
2b0143b5 | 2414 | struct inode *inode = d_inode(dentry); |
6feb9891 PS |
2415 | |
2416 | rc = cifs_revalidate_dentry_attr(dentry); | |
2417 | if (rc) | |
2418 | return rc; | |
2419 | ||
e284e53f | 2420 | return cifs_revalidate_mapping(inode); |
6feb9891 PS |
2421 | } |
2422 | ||
549c7297 CB |
2423 | int cifs_getattr(struct user_namespace *mnt_userns, const struct path *path, |
2424 | struct kstat *stat, u32 request_mask, unsigned int flags) | |
1da177e4 | 2425 | { |
a528d35e | 2426 | struct dentry *dentry = path->dentry; |
3aa1c8c2 | 2427 | struct cifs_sb_info *cifs_sb = CIFS_SB(dentry->d_sb); |
96daf2b0 | 2428 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
2b0143b5 | 2429 | struct inode *inode = d_inode(dentry); |
6feb9891 | 2430 | int rc; |
3aa1c8c2 | 2431 | |
087f757b SF |
2432 | if (unlikely(cifs_forced_shutdown(CIFS_SB(inode->i_sb)))) |
2433 | return -EIO; | |
2434 | ||
6feb9891 PS |
2435 | /* |
2436 | * We need to be sure that all dirty pages are written and the server | |
2437 | * has actual ctime, mtime and file length. | |
2438 | */ | |
65af8f01 | 2439 | if ((request_mask & (STATX_CTIME | STATX_MTIME | STATX_SIZE | STATX_BLOCKS)) && |
ffdec8d6 SF |
2440 | !CIFS_CACHE_READ(CIFS_I(inode)) && |
2441 | inode->i_mapping && inode->i_mapping->nrpages != 0) { | |
6feb9891 | 2442 | rc = filemap_fdatawait(inode->i_mapping); |
156ecb2d SF |
2443 | if (rc) { |
2444 | mapping_set_error(inode->i_mapping, rc); | |
2445 | return rc; | |
2446 | } | |
6feb9891 | 2447 | } |
1c456013 | 2448 | |
ffdec8d6 SF |
2449 | if ((flags & AT_STATX_SYNC_TYPE) == AT_STATX_FORCE_SYNC) |
2450 | CIFS_I(inode)->time = 0; /* force revalidate */ | |
2451 | ||
2452 | /* | |
2453 | * If the caller doesn't require syncing, only sync if | |
2454 | * necessary (e.g. due to earlier truncate or setattr | |
2455 | * invalidating the cached metadata) | |
2456 | */ | |
2457 | if (((flags & AT_STATX_SYNC_TYPE) != AT_STATX_DONT_SYNC) || | |
2458 | (CIFS_I(inode)->time == 0)) { | |
2459 | rc = cifs_revalidate_dentry_attr(dentry); | |
2460 | if (rc) | |
2461 | return rc; | |
2462 | } | |
6feb9891 | 2463 | |
0d56a451 | 2464 | generic_fillattr(&init_user_ns, inode, stat); |
522aa3b5 | 2465 | stat->blksize = cifs_sb->ctx->bsize; |
6feb9891 PS |
2466 | stat->ino = CIFS_I(inode)->uniqueid; |
2467 | ||
6e70e26d SF |
2468 | /* old CIFS Unix Extensions doesn't return create time */ |
2469 | if (CIFS_I(inode)->createtime) { | |
2470 | stat->result_mask |= STATX_BTIME; | |
95390201 AB |
2471 | stat->btime = |
2472 | cifs_NTtimeToUnix(cpu_to_le64(CIFS_I(inode)->createtime)); | |
6e70e26d SF |
2473 | } |
2474 | ||
2475 | stat->attributes_mask |= (STATX_ATTR_COMPRESSED | STATX_ATTR_ENCRYPTED); | |
2476 | if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_COMPRESSED) | |
2477 | stat->attributes |= STATX_ATTR_COMPRESSED; | |
2478 | if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_ENCRYPTED) | |
2479 | stat->attributes |= STATX_ATTR_ENCRYPTED; | |
2480 | ||
6feb9891 | 2481 | /* |
d3d1fce1 JL |
2482 | * If on a multiuser mount without unix extensions or cifsacl being |
2483 | * enabled, and the admin hasn't overridden them, set the ownership | |
2484 | * to the fsuid/fsgid of the current process. | |
6feb9891 PS |
2485 | */ |
2486 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) && | |
d3d1fce1 | 2487 | !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) && |
6feb9891 PS |
2488 | !tcon->unix_ext) { |
2489 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)) | |
2490 | stat->uid = current_fsuid(); | |
2491 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)) | |
2492 | stat->gid = current_fsgid(); | |
5fe14c85 | 2493 | } |
39946886 | 2494 | return 0; |
1da177e4 LT |
2495 | } |
2496 | ||
2f3ebaba RS |
2497 | int cifs_fiemap(struct inode *inode, struct fiemap_extent_info *fei, u64 start, |
2498 | u64 len) | |
2499 | { | |
2500 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); | |
2501 | struct cifs_sb_info *cifs_sb = CIFS_SB(cifs_i->vfs_inode.i_sb); | |
2502 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); | |
2503 | struct TCP_Server_Info *server = tcon->ses->server; | |
2504 | struct cifsFileInfo *cfile; | |
2505 | int rc; | |
2506 | ||
087f757b SF |
2507 | if (unlikely(cifs_forced_shutdown(cifs_sb))) |
2508 | return -EIO; | |
2509 | ||
2f3ebaba RS |
2510 | /* |
2511 | * We need to be sure that all dirty pages are written as they | |
2512 | * might fill holes on the server. | |
2513 | */ | |
2514 | if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping && | |
2515 | inode->i_mapping->nrpages != 0) { | |
2516 | rc = filemap_fdatawait(inode->i_mapping); | |
2517 | if (rc) { | |
2518 | mapping_set_error(inode->i_mapping, rc); | |
2519 | return rc; | |
2520 | } | |
2521 | } | |
2522 | ||
2523 | cfile = find_readable_file(cifs_i, false); | |
2524 | if (cfile == NULL) | |
2525 | return -EINVAL; | |
2526 | ||
2527 | if (server->ops->fiemap) { | |
2528 | rc = server->ops->fiemap(tcon, cfile, fei, start, len); | |
2529 | cifsFileInfo_put(cfile); | |
2530 | return rc; | |
2531 | } | |
2532 | ||
2533 | cifsFileInfo_put(cfile); | |
2534 | return -ENOTSUPP; | |
2535 | } | |
2536 | ||
8bd0d701 | 2537 | int cifs_truncate_page(struct address_space *mapping, loff_t from) |
1da177e4 | 2538 | { |
09cbfeaf KS |
2539 | pgoff_t index = from >> PAGE_SHIFT; |
2540 | unsigned offset = from & (PAGE_SIZE - 1); | |
1da177e4 | 2541 | struct page *page; |
1da177e4 LT |
2542 | int rc = 0; |
2543 | ||
2544 | page = grab_cache_page(mapping, index); | |
2545 | if (!page) | |
2546 | return -ENOMEM; | |
2547 | ||
09cbfeaf | 2548 | zero_user_segment(page, offset, PAGE_SIZE); |
1da177e4 | 2549 | unlock_page(page); |
09cbfeaf | 2550 | put_page(page); |
1da177e4 LT |
2551 | return rc; |
2552 | } | |
2553 | ||
8bd0d701 | 2554 | void cifs_setsize(struct inode *inode, loff_t offset) |
3677db10 | 2555 | { |
57c55cd7 RS |
2556 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
2557 | ||
ba6a46a0 | 2558 | spin_lock(&inode->i_lock); |
3677db10 | 2559 | i_size_write(inode, offset); |
ba6a46a0 | 2560 | spin_unlock(&inode->i_lock); |
1b947463 | 2561 | |
57c55cd7 RS |
2562 | /* Cached inode must be refreshed on truncate */ |
2563 | cifs_i->time = 0; | |
7caef267 | 2564 | truncate_pagecache(inode, offset); |
3677db10 SF |
2565 | } |
2566 | ||
8efdbde6 JL |
2567 | static int |
2568 | cifs_set_file_size(struct inode *inode, struct iattr *attrs, | |
f6f1f179 | 2569 | unsigned int xid, const char *full_path) |
8efdbde6 JL |
2570 | { |
2571 | int rc; | |
2572 | struct cifsFileInfo *open_file; | |
2573 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); | |
2574 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
7ffec372 | 2575 | struct tcon_link *tlink = NULL; |
d1433418 PS |
2576 | struct cifs_tcon *tcon = NULL; |
2577 | struct TCP_Server_Info *server; | |
8efdbde6 JL |
2578 | |
2579 | /* | |
2580 | * To avoid spurious oplock breaks from server, in the case of | |
2581 | * inodes that we already have open, avoid doing path based | |
2582 | * setting of file size if we can do it by handle. | |
2583 | * This keeps our caching token (oplock) and avoids timeouts | |
2584 | * when the local oplock break takes longer to flush | |
2585 | * writebehind data than the SMB timeout for the SetPathInfo | |
2586 | * request would allow | |
2587 | */ | |
86f740f2 | 2588 | open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY); |
8efdbde6 | 2589 | if (open_file) { |
d1433418 PS |
2590 | tcon = tlink_tcon(open_file->tlink); |
2591 | server = tcon->ses->server; | |
2592 | if (server->ops->set_file_size) | |
2593 | rc = server->ops->set_file_size(xid, tcon, open_file, | |
2594 | attrs->ia_size, false); | |
2595 | else | |
2596 | rc = -ENOSYS; | |
6ab409b5 | 2597 | cifsFileInfo_put(open_file); |
f96637be | 2598 | cifs_dbg(FYI, "SetFSize for attrs rc = %d\n", rc); |
8efdbde6 JL |
2599 | } else |
2600 | rc = -EINVAL; | |
2601 | ||
d1433418 PS |
2602 | if (!rc) |
2603 | goto set_size_out; | |
2604 | ||
2605 | if (tcon == NULL) { | |
2606 | tlink = cifs_sb_tlink(cifs_sb); | |
2607 | if (IS_ERR(tlink)) | |
2608 | return PTR_ERR(tlink); | |
2609 | tcon = tlink_tcon(tlink); | |
2610 | server = tcon->ses->server; | |
2611 | } | |
ba00ba64 | 2612 | |
d1433418 PS |
2613 | /* |
2614 | * Set file size by pathname rather than by handle either because no | |
2615 | * valid, writeable file handle for it was found or because there was | |
2616 | * an error setting it by handle. | |
2617 | */ | |
2618 | if (server->ops->set_path_size) | |
2619 | rc = server->ops->set_path_size(xid, tcon, full_path, | |
2620 | attrs->ia_size, cifs_sb, false); | |
2621 | else | |
2622 | rc = -ENOSYS; | |
f96637be | 2623 | cifs_dbg(FYI, "SetEOF by path (setattrs) rc = %d\n", rc); |
d1433418 | 2624 | |
d1433418 PS |
2625 | if (tlink) |
2626 | cifs_put_tlink(tlink); | |
8efdbde6 | 2627 | |
d1433418 | 2628 | set_size_out: |
8efdbde6 | 2629 | if (rc == 0) { |
fbec9ab9 | 2630 | cifsInode->server_eof = attrs->ia_size; |
1b947463 | 2631 | cifs_setsize(inode, attrs->ia_size); |
65af8f01 SF |
2632 | /* |
2633 | * i_blocks is not related to (i_size / i_blksize), but instead | |
2634 | * 512 byte (2**9) size is required for calculating num blocks. | |
2635 | * Until we can query the server for actual allocation size, | |
2636 | * this is best estimate we have for blocks allocated for a file | |
2637 | * Number of blocks must be rounded up so size 1 is not 0 blocks | |
2638 | */ | |
2639 | inode->i_blocks = (512 - 1 + attrs->ia_size) >> 9; | |
5618303d ZX |
2640 | |
2641 | /* | |
2642 | * The man page of truncate says if the size changed, | |
2643 | * then the st_ctime and st_mtime fields for the file | |
2644 | * are updated. | |
2645 | */ | |
2646 | attrs->ia_ctime = attrs->ia_mtime = current_time(inode); | |
2647 | attrs->ia_valid |= ATTR_CTIME | ATTR_MTIME; | |
2648 | ||
8efdbde6 JL |
2649 | cifs_truncate_page(inode->i_mapping, inode->i_size); |
2650 | } | |
2651 | ||
2652 | return rc; | |
2653 | } | |
2654 | ||
3fe5c1dd JL |
2655 | static int |
2656 | cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs) | |
2657 | { | |
2658 | int rc; | |
6d5786a3 | 2659 | unsigned int xid; |
f6a9bc33 AV |
2660 | const char *full_path; |
2661 | void *page = alloc_dentry_path(); | |
2b0143b5 | 2662 | struct inode *inode = d_inode(direntry); |
3fe5c1dd JL |
2663 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
2664 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
7ffec372 | 2665 | struct tcon_link *tlink; |
96daf2b0 | 2666 | struct cifs_tcon *pTcon; |
3fe5c1dd | 2667 | struct cifs_unix_set_info_args *args = NULL; |
3bbeeb3c | 2668 | struct cifsFileInfo *open_file; |
3fe5c1dd | 2669 | |
35c265e0 AV |
2670 | cifs_dbg(FYI, "setattr_unix on file %pd attrs->ia_valid=0x%x\n", |
2671 | direntry, attrs->ia_valid); | |
3fe5c1dd | 2672 | |
6d5786a3 | 2673 | xid = get_xid(); |
3fe5c1dd | 2674 | |
db78b877 CH |
2675 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) |
2676 | attrs->ia_valid |= ATTR_FORCE; | |
2677 | ||
2f221d6f | 2678 | rc = setattr_prepare(&init_user_ns, direntry, attrs); |
db78b877 CH |
2679 | if (rc < 0) |
2680 | goto out; | |
3fe5c1dd | 2681 | |
f6a9bc33 AV |
2682 | full_path = build_path_from_dentry(direntry, page); |
2683 | if (IS_ERR(full_path)) { | |
2684 | rc = PTR_ERR(full_path); | |
3fe5c1dd JL |
2685 | goto out; |
2686 | } | |
2687 | ||
0f4d634c JL |
2688 | /* |
2689 | * Attempt to flush data before changing attributes. We need to do | |
2690 | * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the | |
2691 | * ownership or mode then we may also need to do this. Here, we take | |
2692 | * the safe way out and just do the flush on all setattr requests. If | |
2693 | * the flush returns error, store it to report later and continue. | |
2694 | * | |
2695 | * BB: This should be smarter. Why bother flushing pages that | |
2696 | * will be truncated anyway? Also, should we error out here if | |
2697 | * the flush returns error? | |
2698 | */ | |
2699 | rc = filemap_write_and_wait(inode->i_mapping); | |
9a66396f PS |
2700 | if (is_interrupt_error(rc)) { |
2701 | rc = -ERESTARTSYS; | |
2702 | goto out; | |
2703 | } | |
2704 | ||
eb4b756b JL |
2705 | mapping_set_error(inode->i_mapping, rc); |
2706 | rc = 0; | |
3fe5c1dd JL |
2707 | |
2708 | if (attrs->ia_valid & ATTR_SIZE) { | |
2709 | rc = cifs_set_file_size(inode, attrs, xid, full_path); | |
2710 | if (rc != 0) | |
2711 | goto out; | |
2712 | } | |
2713 | ||
2714 | /* skip mode change if it's just for clearing setuid/setgid */ | |
2715 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) | |
2716 | attrs->ia_valid &= ~ATTR_MODE; | |
2717 | ||
2718 | args = kmalloc(sizeof(*args), GFP_KERNEL); | |
2719 | if (args == NULL) { | |
2720 | rc = -ENOMEM; | |
2721 | goto out; | |
2722 | } | |
2723 | ||
2724 | /* set up the struct */ | |
2725 | if (attrs->ia_valid & ATTR_MODE) | |
2726 | args->mode = attrs->ia_mode; | |
2727 | else | |
2728 | args->mode = NO_CHANGE_64; | |
2729 | ||
2730 | if (attrs->ia_valid & ATTR_UID) | |
2731 | args->uid = attrs->ia_uid; | |
2732 | else | |
49418b2c | 2733 | args->uid = INVALID_UID; /* no change */ |
3fe5c1dd JL |
2734 | |
2735 | if (attrs->ia_valid & ATTR_GID) | |
2736 | args->gid = attrs->ia_gid; | |
2737 | else | |
49418b2c | 2738 | args->gid = INVALID_GID; /* no change */ |
3fe5c1dd JL |
2739 | |
2740 | if (attrs->ia_valid & ATTR_ATIME) | |
95390201 | 2741 | args->atime = cifs_UnixTimeToNT(attrs->ia_atime); |
3fe5c1dd JL |
2742 | else |
2743 | args->atime = NO_CHANGE_64; | |
2744 | ||
2745 | if (attrs->ia_valid & ATTR_MTIME) | |
95390201 | 2746 | args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime); |
3fe5c1dd JL |
2747 | else |
2748 | args->mtime = NO_CHANGE_64; | |
2749 | ||
2750 | if (attrs->ia_valid & ATTR_CTIME) | |
95390201 | 2751 | args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime); |
3fe5c1dd JL |
2752 | else |
2753 | args->ctime = NO_CHANGE_64; | |
2754 | ||
2755 | args->device = 0; | |
86f740f2 | 2756 | open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY); |
3bbeeb3c | 2757 | if (open_file) { |
4b4de76e | 2758 | u16 nfid = open_file->fid.netfid; |
3bbeeb3c | 2759 | u32 npid = open_file->pid; |
13cfb733 | 2760 | pTcon = tlink_tcon(open_file->tlink); |
3bbeeb3c | 2761 | rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid); |
6ab409b5 | 2762 | cifsFileInfo_put(open_file); |
3bbeeb3c | 2763 | } else { |
7ffec372 JL |
2764 | tlink = cifs_sb_tlink(cifs_sb); |
2765 | if (IS_ERR(tlink)) { | |
2766 | rc = PTR_ERR(tlink); | |
2767 | goto out; | |
2768 | } | |
2769 | pTcon = tlink_tcon(tlink); | |
3bbeeb3c | 2770 | rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args, |
01ea95e3 | 2771 | cifs_sb->local_nls, |
bc8ebdc4 | 2772 | cifs_remap(cifs_sb)); |
7ffec372 | 2773 | cifs_put_tlink(tlink); |
3bbeeb3c | 2774 | } |
3fe5c1dd | 2775 | |
1025774c CH |
2776 | if (rc) |
2777 | goto out; | |
ccd4bb1b | 2778 | |
1025774c | 2779 | if ((attrs->ia_valid & ATTR_SIZE) && |
1b947463 CH |
2780 | attrs->ia_size != i_size_read(inode)) |
2781 | truncate_setsize(inode, attrs->ia_size); | |
1025774c | 2782 | |
2f221d6f | 2783 | setattr_copy(&init_user_ns, inode, attrs); |
1025774c CH |
2784 | mark_inode_dirty(inode); |
2785 | ||
2786 | /* force revalidate when any of these times are set since some | |
2787 | of the fs types (eg ext3, fat) do not have fine enough | |
2788 | time granularity to match protocol, and we do not have a | |
2789 | a way (yet) to query the server fs's time granularity (and | |
2790 | whether it rounds times down). | |
2791 | */ | |
2792 | if (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME)) | |
2793 | cifsInode->time = 0; | |
3fe5c1dd JL |
2794 | out: |
2795 | kfree(args); | |
f6a9bc33 | 2796 | free_dentry_path(page); |
6d5786a3 | 2797 | free_xid(xid); |
3fe5c1dd JL |
2798 | return rc; |
2799 | } | |
2800 | ||
0510eeb7 JL |
2801 | static int |
2802 | cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs) | |
1da177e4 | 2803 | { |
6d5786a3 | 2804 | unsigned int xid; |
8abf2775 EB |
2805 | kuid_t uid = INVALID_UID; |
2806 | kgid_t gid = INVALID_GID; | |
2b0143b5 | 2807 | struct inode *inode = d_inode(direntry); |
3fe5c1dd | 2808 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
3fe5c1dd | 2809 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
aa081859 RS |
2810 | struct cifsFileInfo *wfile; |
2811 | struct cifs_tcon *tcon; | |
f6a9bc33 AV |
2812 | const char *full_path; |
2813 | void *page = alloc_dentry_path(); | |
1da177e4 | 2814 | int rc = -EACCES; |
feb3e20c | 2815 | __u32 dosattr = 0; |
4e1e7fb9 | 2816 | __u64 mode = NO_CHANGE_64; |
3fe5c1dd | 2817 | |
6d5786a3 | 2818 | xid = get_xid(); |
1da177e4 | 2819 | |
63d614a6 | 2820 | cifs_dbg(FYI, "setattr on file %pd attrs->ia_valid 0x%x\n", |
35c265e0 | 2821 | direntry, attrs->ia_valid); |
6473a559 | 2822 | |
db78b877 CH |
2823 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) |
2824 | attrs->ia_valid |= ATTR_FORCE; | |
2825 | ||
2f221d6f | 2826 | rc = setattr_prepare(&init_user_ns, direntry, attrs); |
f6a9bc33 AV |
2827 | if (rc < 0) |
2828 | goto cifs_setattr_exit; | |
50c2f753 | 2829 | |
f6a9bc33 AV |
2830 | full_path = build_path_from_dentry(direntry, page); |
2831 | if (IS_ERR(full_path)) { | |
2832 | rc = PTR_ERR(full_path); | |
2833 | goto cifs_setattr_exit; | |
1da177e4 | 2834 | } |
1da177e4 | 2835 | |
0f4d634c JL |
2836 | /* |
2837 | * Attempt to flush data before changing attributes. We need to do | |
cf5371ae SF |
2838 | * this for ATTR_SIZE and ATTR_MTIME. If the flush of the data |
2839 | * returns error, store it to report later and continue. | |
0f4d634c JL |
2840 | * |
2841 | * BB: This should be smarter. Why bother flushing pages that | |
2842 | * will be truncated anyway? Also, should we error out here if | |
cf5371ae | 2843 | * the flush returns error? Do we need to check for ATTR_MTIME_SET flag? |
0f4d634c | 2844 | */ |
cf5371ae SF |
2845 | if (attrs->ia_valid & (ATTR_MTIME | ATTR_SIZE | ATTR_CTIME)) { |
2846 | rc = filemap_write_and_wait(inode->i_mapping); | |
2847 | if (is_interrupt_error(rc)) { | |
2848 | rc = -ERESTARTSYS; | |
2849 | goto cifs_setattr_exit; | |
2850 | } | |
2851 | mapping_set_error(inode->i_mapping, rc); | |
9a66396f PS |
2852 | } |
2853 | ||
eb4b756b | 2854 | rc = 0; |
cea21805 | 2855 | |
cf5371ae SF |
2856 | if ((attrs->ia_valid & ATTR_MTIME) && |
2857 | !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) { | |
86f740f2 | 2858 | rc = cifs_get_writable_file(cifsInode, FIND_WR_ANY, &wfile); |
aa081859 RS |
2859 | if (!rc) { |
2860 | tcon = tlink_tcon(wfile->tlink); | |
2861 | rc = tcon->ses->server->ops->flush(xid, tcon, &wfile->fid); | |
2862 | cifsFileInfo_put(wfile); | |
2863 | if (rc) | |
783bf7b8 | 2864 | goto cifs_setattr_exit; |
aa081859 | 2865 | } else if (rc != -EBADF) |
783bf7b8 | 2866 | goto cifs_setattr_exit; |
aa081859 RS |
2867 | else |
2868 | rc = 0; | |
2869 | } | |
2870 | ||
50531444 | 2871 | if (attrs->ia_valid & ATTR_SIZE) { |
8efdbde6 JL |
2872 | rc = cifs_set_file_size(inode, attrs, xid, full_path); |
2873 | if (rc != 0) | |
e30dcf3a | 2874 | goto cifs_setattr_exit; |
1da177e4 | 2875 | } |
4ca691a8 | 2876 | |
a5ff3769 SP |
2877 | if (attrs->ia_valid & ATTR_UID) |
2878 | uid = attrs->ia_uid; | |
2879 | ||
2880 | if (attrs->ia_valid & ATTR_GID) | |
2881 | gid = attrs->ia_gid; | |
2882 | ||
22442179 SF |
2883 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) || |
2884 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) { | |
8abf2775 | 2885 | if (uid_valid(uid) || gid_valid(gid)) { |
0f22053e SP |
2886 | mode = NO_CHANGE_64; |
2887 | rc = id_mode_to_cifs_acl(inode, full_path, &mode, | |
a5ff3769 SP |
2888 | uid, gid); |
2889 | if (rc) { | |
f96637be JP |
2890 | cifs_dbg(FYI, "%s: Setting id failed with error: %d\n", |
2891 | __func__, rc); | |
a5ff3769 SP |
2892 | goto cifs_setattr_exit; |
2893 | } | |
2894 | } | |
2895 | } else | |
3fe5c1dd | 2896 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) |
4ca691a8 | 2897 | attrs->ia_valid &= ~(ATTR_UID | ATTR_GID); |
1da177e4 | 2898 | |
d32c4f26 JL |
2899 | /* skip mode change if it's just for clearing setuid/setgid */ |
2900 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) | |
2901 | attrs->ia_valid &= ~ATTR_MODE; | |
2902 | ||
1da177e4 | 2903 | if (attrs->ia_valid & ATTR_MODE) { |
1da177e4 | 2904 | mode = attrs->ia_mode; |
cdbce9c8 | 2905 | rc = 0; |
22442179 SF |
2906 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) || |
2907 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) { | |
0f22053e | 2908 | rc = id_mode_to_cifs_acl(inode, full_path, &mode, |
8abf2775 | 2909 | INVALID_UID, INVALID_GID); |
78415d2d | 2910 | if (rc) { |
f96637be JP |
2911 | cifs_dbg(FYI, "%s: Setting ACL failed with error: %d\n", |
2912 | __func__, rc); | |
78415d2d SP |
2913 | goto cifs_setattr_exit; |
2914 | } | |
0f22053e SP |
2915 | |
2916 | /* | |
2917 | * In case of CIFS_MOUNT_CIFS_ACL, we cannot support all modes. | |
2918 | * Pick up the actual mode bits that were set. | |
2919 | */ | |
2920 | if (mode != attrs->ia_mode) | |
2921 | attrs->ia_mode = mode; | |
78415d2d | 2922 | } else |
5132861a JL |
2923 | if (((mode & S_IWUGO) == 0) && |
2924 | (cifsInode->cifsAttrs & ATTR_READONLY) == 0) { | |
feb3e20c JL |
2925 | |
2926 | dosattr = cifsInode->cifsAttrs | ATTR_READONLY; | |
2927 | ||
5132861a JL |
2928 | /* fix up mode if we're not using dynperm */ |
2929 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0) | |
2930 | attrs->ia_mode = inode->i_mode & ~S_IWUGO; | |
2931 | } else if ((mode & S_IWUGO) && | |
2932 | (cifsInode->cifsAttrs & ATTR_READONLY)) { | |
feb3e20c JL |
2933 | |
2934 | dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY; | |
2935 | /* Attributes of 0 are ignored */ | |
2936 | if (dosattr == 0) | |
2937 | dosattr |= ATTR_NORMAL; | |
5132861a JL |
2938 | |
2939 | /* reset local inode permissions to normal */ | |
2940 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { | |
2941 | attrs->ia_mode &= ~(S_IALLUGO); | |
2942 | if (S_ISDIR(inode->i_mode)) | |
2943 | attrs->ia_mode |= | |
8401e936 | 2944 | cifs_sb->ctx->dir_mode; |
5132861a JL |
2945 | else |
2946 | attrs->ia_mode |= | |
8401e936 | 2947 | cifs_sb->ctx->file_mode; |
5132861a JL |
2948 | } |
2949 | } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { | |
2950 | /* ignore mode change - ATTR_READONLY hasn't changed */ | |
2951 | attrs->ia_valid &= ~ATTR_MODE; | |
1da177e4 | 2952 | } |
1da177e4 LT |
2953 | } |
2954 | ||
feb3e20c JL |
2955 | if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) || |
2956 | ((attrs->ia_valid & ATTR_MODE) && dosattr)) { | |
2957 | rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); | |
2958 | /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */ | |
1da177e4 | 2959 | |
e30dcf3a SF |
2960 | /* Even if error on time set, no sense failing the call if |
2961 | the server would set the time to a reasonable value anyway, | |
2962 | and this check ensures that we are not being called from | |
2963 | sys_utimes in which case we ought to fail the call back to | |
2964 | the user when the server rejects the call */ | |
fb8c4b14 | 2965 | if ((rc) && (attrs->ia_valid & |
feb3e20c | 2966 | (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE))) |
e30dcf3a | 2967 | rc = 0; |
1da177e4 LT |
2968 | } |
2969 | ||
2970 | /* do not need local check to inode_check_ok since the server does | |
2971 | that */ | |
1025774c CH |
2972 | if (rc) |
2973 | goto cifs_setattr_exit; | |
2974 | ||
2975 | if ((attrs->ia_valid & ATTR_SIZE) && | |
1b947463 CH |
2976 | attrs->ia_size != i_size_read(inode)) |
2977 | truncate_setsize(inode, attrs->ia_size); | |
1025774c | 2978 | |
2f221d6f | 2979 | setattr_copy(&init_user_ns, inode, attrs); |
1025774c | 2980 | mark_inode_dirty(inode); |
1025774c | 2981 | |
e30dcf3a | 2982 | cifs_setattr_exit: |
6d5786a3 | 2983 | free_xid(xid); |
f6a9bc33 | 2984 | free_dentry_path(page); |
1da177e4 LT |
2985 | return rc; |
2986 | } | |
2987 | ||
0510eeb7 | 2988 | int |
549c7297 CB |
2989 | cifs_setattr(struct user_namespace *mnt_userns, struct dentry *direntry, |
2990 | struct iattr *attrs) | |
0510eeb7 | 2991 | { |
fc64005c | 2992 | struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb); |
96daf2b0 | 2993 | struct cifs_tcon *pTcon = cifs_sb_master_tcon(cifs_sb); |
c6cc4c5a | 2994 | int rc, retries = 0; |
0510eeb7 | 2995 | |
087f757b SF |
2996 | if (unlikely(cifs_forced_shutdown(cifs_sb))) |
2997 | return -EIO; | |
2998 | ||
c6cc4c5a RS |
2999 | do { |
3000 | if (pTcon->unix_ext) | |
3001 | rc = cifs_setattr_unix(direntry, attrs); | |
3002 | else | |
3003 | rc = cifs_setattr_nounix(direntry, attrs); | |
3004 | retries++; | |
3005 | } while (is_retryable_error(rc) && retries < 2); | |
0510eeb7 JL |
3006 | |
3007 | /* BB: add cifs_setattr_legacy for really old servers */ | |
c6cc4c5a | 3008 | return rc; |
0510eeb7 | 3009 | } |