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1da177e4 LT |
1 | /* |
2 | * fs/cifs/inode.c | |
3 | * | |
f19159dc | 4 | * Copyright (C) International Business Machines Corp., 2002,2010 |
1da177e4 LT |
5 | * Author(s): Steve French (sfrench@us.ibm.com) |
6 | * | |
7 | * This library is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU Lesser General Public License as published | |
9 | * by the Free Software Foundation; either version 2.1 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This library is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
15 | * the GNU Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public License | |
18 | * along with this library; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
21 | #include <linux/fs.h> | |
1da177e4 | 22 | #include <linux/stat.h> |
5a0e3ad6 | 23 | #include <linux/slab.h> |
1da177e4 LT |
24 | #include <linux/pagemap.h> |
25 | #include <asm/div64.h> | |
26 | #include "cifsfs.h" | |
27 | #include "cifspdu.h" | |
28 | #include "cifsglob.h" | |
29 | #include "cifsproto.h" | |
30 | #include "cifs_debug.h" | |
31 | #include "cifs_fs_sb.h" | |
9451a9a5 | 32 | #include "fscache.h" |
1da177e4 | 33 | |
70eff55d | 34 | |
7962670e | 35 | static void cifs_set_ops(struct inode *inode, const bool is_dfs_referral) |
70eff55d CH |
36 | { |
37 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
38 | ||
39 | switch (inode->i_mode & S_IFMT) { | |
40 | case S_IFREG: | |
41 | inode->i_op = &cifs_file_inode_ops; | |
42 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { | |
43 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
44 | inode->i_fop = &cifs_file_direct_nobrl_ops; | |
45 | else | |
46 | inode->i_fop = &cifs_file_direct_ops; | |
47 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
48 | inode->i_fop = &cifs_file_nobrl_ops; | |
49 | else { /* not direct, send byte range locks */ | |
50 | inode->i_fop = &cifs_file_ops; | |
51 | } | |
52 | ||
53 | ||
54 | /* check if server can support readpages */ | |
55 | if (cifs_sb->tcon->ses->server->maxBuf < | |
56 | PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE) | |
57 | inode->i_data.a_ops = &cifs_addr_ops_smallbuf; | |
58 | else | |
59 | inode->i_data.a_ops = &cifs_addr_ops; | |
60 | break; | |
61 | case S_IFDIR: | |
bc5b6e24 | 62 | #ifdef CONFIG_CIFS_DFS_UPCALL |
7962670e IM |
63 | if (is_dfs_referral) { |
64 | inode->i_op = &cifs_dfs_referral_inode_operations; | |
65 | } else { | |
bc5b6e24 SF |
66 | #else /* NO DFS support, treat as a directory */ |
67 | { | |
68 | #endif | |
7962670e IM |
69 | inode->i_op = &cifs_dir_inode_ops; |
70 | inode->i_fop = &cifs_dir_ops; | |
71 | } | |
70eff55d CH |
72 | break; |
73 | case S_IFLNK: | |
74 | inode->i_op = &cifs_symlink_inode_ops; | |
75 | break; | |
76 | default: | |
77 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
78 | break; | |
79 | } | |
80 | } | |
81 | ||
df2cf170 JL |
82 | /* check inode attributes against fattr. If they don't match, tag the |
83 | * inode for cache invalidation | |
84 | */ | |
85 | static void | |
86 | cifs_revalidate_cache(struct inode *inode, struct cifs_fattr *fattr) | |
87 | { | |
88 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); | |
89 | ||
f19159dc | 90 | cFYI(1, "%s: revalidating inode %llu", __func__, cifs_i->uniqueid); |
df2cf170 JL |
91 | |
92 | if (inode->i_state & I_NEW) { | |
f19159dc | 93 | cFYI(1, "%s: inode %llu is new", __func__, cifs_i->uniqueid); |
df2cf170 JL |
94 | return; |
95 | } | |
96 | ||
97 | /* don't bother with revalidation if we have an oplock */ | |
98 | if (cifs_i->clientCanCacheRead) { | |
f19159dc SF |
99 | cFYI(1, "%s: inode %llu is oplocked", __func__, |
100 | cifs_i->uniqueid); | |
df2cf170 JL |
101 | return; |
102 | } | |
103 | ||
104 | /* revalidate if mtime or size have changed */ | |
105 | if (timespec_equal(&inode->i_mtime, &fattr->cf_mtime) && | |
106 | cifs_i->server_eof == fattr->cf_eof) { | |
f19159dc SF |
107 | cFYI(1, "%s: inode %llu is unchanged", __func__, |
108 | cifs_i->uniqueid); | |
df2cf170 JL |
109 | return; |
110 | } | |
111 | ||
f19159dc SF |
112 | cFYI(1, "%s: invalidating inode %llu mapping", __func__, |
113 | cifs_i->uniqueid); | |
df2cf170 JL |
114 | cifs_i->invalid_mapping = true; |
115 | } | |
116 | ||
cc0bad75 JL |
117 | /* populate an inode with info from a cifs_fattr struct */ |
118 | void | |
119 | cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr) | |
75f12983 | 120 | { |
cc0bad75 | 121 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
0b8f18e3 JL |
122 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
123 | unsigned long oldtime = cifs_i->time; | |
cc0bad75 | 124 | |
df2cf170 JL |
125 | cifs_revalidate_cache(inode, fattr); |
126 | ||
cc0bad75 JL |
127 | inode->i_atime = fattr->cf_atime; |
128 | inode->i_mtime = fattr->cf_mtime; | |
129 | inode->i_ctime = fattr->cf_ctime; | |
cc0bad75 JL |
130 | inode->i_rdev = fattr->cf_rdev; |
131 | inode->i_nlink = fattr->cf_nlink; | |
132 | inode->i_uid = fattr->cf_uid; | |
133 | inode->i_gid = fattr->cf_gid; | |
134 | ||
0b8f18e3 JL |
135 | /* if dynperm is set, don't clobber existing mode */ |
136 | if (inode->i_state & I_NEW || | |
137 | !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) | |
138 | inode->i_mode = fattr->cf_mode; | |
139 | ||
cc0bad75 | 140 | cifs_i->cifsAttrs = fattr->cf_cifsattrs; |
75f12983 | 141 | |
0b8f18e3 JL |
142 | if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL) |
143 | cifs_i->time = 0; | |
144 | else | |
145 | cifs_i->time = jiffies; | |
146 | ||
b6b38f70 JP |
147 | cFYI(1, "inode 0x%p old_time=%ld new_time=%ld", inode, |
148 | oldtime, cifs_i->time); | |
0b8f18e3 JL |
149 | |
150 | cifs_i->delete_pending = fattr->cf_flags & CIFS_FATTR_DELETE_PENDING; | |
cc0bad75 | 151 | |
835a36ca | 152 | cifs_i->server_eof = fattr->cf_eof; |
cc0bad75 JL |
153 | /* |
154 | * Can't safely change the file size here if the client is writing to | |
155 | * it due to potential races. | |
156 | */ | |
157 | spin_lock(&inode->i_lock); | |
158 | if (is_size_safe_to_change(cifs_i, fattr->cf_eof)) { | |
159 | i_size_write(inode, fattr->cf_eof); | |
160 | ||
161 | /* | |
162 | * i_blocks is not related to (i_size / i_blksize), | |
163 | * but instead 512 byte (2**9) size is required for | |
164 | * calculating num blocks. | |
165 | */ | |
166 | inode->i_blocks = (512 - 1 + fattr->cf_bytes) >> 9; | |
167 | } | |
168 | spin_unlock(&inode->i_lock); | |
169 | ||
170 | cifs_set_ops(inode, fattr->cf_flags & CIFS_FATTR_DFS_REFERRAL); | |
171 | } | |
172 | ||
4065c802 JL |
173 | void |
174 | cifs_fill_uniqueid(struct super_block *sb, struct cifs_fattr *fattr) | |
175 | { | |
176 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
177 | ||
178 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
179 | return; | |
180 | ||
181 | fattr->cf_uniqueid = iunique(sb, ROOT_I); | |
182 | } | |
183 | ||
cc0bad75 JL |
184 | /* Fill a cifs_fattr struct with info from FILE_UNIX_BASIC_INFO. */ |
185 | void | |
186 | cifs_unix_basic_to_fattr(struct cifs_fattr *fattr, FILE_UNIX_BASIC_INFO *info, | |
187 | struct cifs_sb_info *cifs_sb) | |
188 | { | |
189 | memset(fattr, 0, sizeof(*fattr)); | |
190 | fattr->cf_uniqueid = le64_to_cpu(info->UniqueId); | |
191 | fattr->cf_bytes = le64_to_cpu(info->NumOfBytes); | |
192 | fattr->cf_eof = le64_to_cpu(info->EndOfFile); | |
193 | ||
194 | fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); | |
195 | fattr->cf_mtime = cifs_NTtimeToUnix(info->LastModificationTime); | |
196 | fattr->cf_ctime = cifs_NTtimeToUnix(info->LastStatusChange); | |
197 | fattr->cf_mode = le64_to_cpu(info->Permissions); | |
75f12983 CH |
198 | |
199 | /* | |
200 | * Since we set the inode type below we need to mask off | |
201 | * to avoid strange results if bits set above. | |
202 | */ | |
cc0bad75 | 203 | fattr->cf_mode &= ~S_IFMT; |
75f12983 CH |
204 | switch (le32_to_cpu(info->Type)) { |
205 | case UNIX_FILE: | |
cc0bad75 JL |
206 | fattr->cf_mode |= S_IFREG; |
207 | fattr->cf_dtype = DT_REG; | |
75f12983 CH |
208 | break; |
209 | case UNIX_SYMLINK: | |
cc0bad75 JL |
210 | fattr->cf_mode |= S_IFLNK; |
211 | fattr->cf_dtype = DT_LNK; | |
75f12983 CH |
212 | break; |
213 | case UNIX_DIR: | |
cc0bad75 JL |
214 | fattr->cf_mode |= S_IFDIR; |
215 | fattr->cf_dtype = DT_DIR; | |
75f12983 CH |
216 | break; |
217 | case UNIX_CHARDEV: | |
cc0bad75 JL |
218 | fattr->cf_mode |= S_IFCHR; |
219 | fattr->cf_dtype = DT_CHR; | |
220 | fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor), | |
221 | le64_to_cpu(info->DevMinor) & MINORMASK); | |
75f12983 CH |
222 | break; |
223 | case UNIX_BLOCKDEV: | |
cc0bad75 JL |
224 | fattr->cf_mode |= S_IFBLK; |
225 | fattr->cf_dtype = DT_BLK; | |
226 | fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor), | |
227 | le64_to_cpu(info->DevMinor) & MINORMASK); | |
75f12983 CH |
228 | break; |
229 | case UNIX_FIFO: | |
cc0bad75 JL |
230 | fattr->cf_mode |= S_IFIFO; |
231 | fattr->cf_dtype = DT_FIFO; | |
75f12983 CH |
232 | break; |
233 | case UNIX_SOCKET: | |
cc0bad75 JL |
234 | fattr->cf_mode |= S_IFSOCK; |
235 | fattr->cf_dtype = DT_SOCK; | |
75f12983 CH |
236 | break; |
237 | default: | |
238 | /* safest to call it a file if we do not know */ | |
cc0bad75 JL |
239 | fattr->cf_mode |= S_IFREG; |
240 | fattr->cf_dtype = DT_REG; | |
b6b38f70 | 241 | cFYI(1, "unknown type %d", le32_to_cpu(info->Type)); |
75f12983 CH |
242 | break; |
243 | } | |
244 | ||
cc0bad75 JL |
245 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) |
246 | fattr->cf_uid = cifs_sb->mnt_uid; | |
75f12983 | 247 | else |
cc0bad75 | 248 | fattr->cf_uid = le64_to_cpu(info->Uid); |
75f12983 | 249 | |
cc0bad75 JL |
250 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) |
251 | fattr->cf_gid = cifs_sb->mnt_gid; | |
75f12983 | 252 | else |
cc0bad75 | 253 | fattr->cf_gid = le64_to_cpu(info->Gid); |
75f12983 | 254 | |
cc0bad75 | 255 | fattr->cf_nlink = le64_to_cpu(info->Nlinks); |
75f12983 CH |
256 | } |
257 | ||
b9a3260f | 258 | /* |
cc0bad75 JL |
259 | * Fill a cifs_fattr struct with fake inode info. |
260 | * | |
261 | * Needed to setup cifs_fattr data for the directory which is the | |
262 | * junction to the new submount (ie to setup the fake directory | |
263 | * which represents a DFS referral). | |
b9a3260f | 264 | */ |
f1230c97 | 265 | static void |
cc0bad75 | 266 | cifs_create_dfs_fattr(struct cifs_fattr *fattr, struct super_block *sb) |
0e4bbde9 | 267 | { |
cc0bad75 | 268 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
0e4bbde9 | 269 | |
b6b38f70 | 270 | cFYI(1, "creating fake fattr for DFS referral"); |
cc0bad75 JL |
271 | |
272 | memset(fattr, 0, sizeof(*fattr)); | |
273 | fattr->cf_mode = S_IFDIR | S_IXUGO | S_IRWXU; | |
274 | fattr->cf_uid = cifs_sb->mnt_uid; | |
275 | fattr->cf_gid = cifs_sb->mnt_gid; | |
276 | fattr->cf_atime = CURRENT_TIME; | |
277 | fattr->cf_ctime = CURRENT_TIME; | |
278 | fattr->cf_mtime = CURRENT_TIME; | |
279 | fattr->cf_nlink = 2; | |
280 | fattr->cf_flags |= CIFS_FATTR_DFS_REFERRAL; | |
0e4bbde9 SF |
281 | } |
282 | ||
abab095d JL |
283 | int cifs_get_file_info_unix(struct file *filp) |
284 | { | |
285 | int rc; | |
286 | int xid; | |
287 | FILE_UNIX_BASIC_INFO find_data; | |
288 | struct cifs_fattr fattr; | |
289 | struct inode *inode = filp->f_path.dentry->d_inode; | |
290 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
291 | struct cifsTconInfo *tcon = cifs_sb->tcon; | |
c21dfb69 | 292 | struct cifsFileInfo *cfile = filp->private_data; |
abab095d JL |
293 | |
294 | xid = GetXid(); | |
295 | rc = CIFSSMBUnixQFileInfo(xid, tcon, cfile->netfid, &find_data); | |
296 | if (!rc) { | |
297 | cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb); | |
298 | } else if (rc == -EREMOTE) { | |
299 | cifs_create_dfs_fattr(&fattr, inode->i_sb); | |
300 | rc = 0; | |
301 | } | |
302 | ||
303 | cifs_fattr_to_inode(inode, &fattr); | |
304 | FreeXid(xid); | |
305 | return rc; | |
306 | } | |
307 | ||
1da177e4 | 308 | int cifs_get_inode_info_unix(struct inode **pinode, |
cc0bad75 JL |
309 | const unsigned char *full_path, |
310 | struct super_block *sb, int xid) | |
1da177e4 | 311 | { |
cc0bad75 | 312 | int rc; |
0e4bbde9 | 313 | FILE_UNIX_BASIC_INFO find_data; |
cc0bad75 JL |
314 | struct cifs_fattr fattr; |
315 | struct cifsTconInfo *tcon; | |
1da177e4 | 316 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
1da177e4 | 317 | |
cc0bad75 | 318 | tcon = cifs_sb->tcon; |
b6b38f70 | 319 | cFYI(1, "Getting info on %s", full_path); |
7962670e | 320 | |
1da177e4 | 321 | /* could have done a find first instead but this returns more info */ |
cc0bad75 | 322 | rc = CIFSSMBUnixQPathInfo(xid, tcon, full_path, &find_data, |
737b758c SF |
323 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
324 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
e911d0cc | 325 | |
cc0bad75 JL |
326 | if (!rc) { |
327 | cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb); | |
328 | } else if (rc == -EREMOTE) { | |
329 | cifs_create_dfs_fattr(&fattr, sb); | |
330 | rc = 0; | |
331 | } else { | |
332 | return rc; | |
333 | } | |
1da177e4 | 334 | |
0e4bbde9 | 335 | if (*pinode == NULL) { |
cc0bad75 | 336 | /* get new inode */ |
4065c802 | 337 | cifs_fill_uniqueid(sb, &fattr); |
cc0bad75 JL |
338 | *pinode = cifs_iget(sb, &fattr); |
339 | if (!*pinode) | |
0e4bbde9 | 340 | rc = -ENOMEM; |
cc0bad75 JL |
341 | } else { |
342 | /* we already have inode, update it */ | |
343 | cifs_fattr_to_inode(*pinode, &fattr); | |
0e4bbde9 | 344 | } |
1da177e4 | 345 | |
1da177e4 LT |
346 | return rc; |
347 | } | |
348 | ||
0b8f18e3 JL |
349 | static int |
350 | cifs_sfu_type(struct cifs_fattr *fattr, const unsigned char *path, | |
351 | struct cifs_sb_info *cifs_sb, int xid) | |
d6e2f2a4 SF |
352 | { |
353 | int rc; | |
4b18f2a9 | 354 | int oplock = 0; |
d6e2f2a4 SF |
355 | __u16 netfid; |
356 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
86c96b4b | 357 | char buf[24]; |
d6e2f2a4 | 358 | unsigned int bytes_read; |
fb8c4b14 | 359 | char *pbuf; |
d6e2f2a4 SF |
360 | |
361 | pbuf = buf; | |
362 | ||
0b8f18e3 JL |
363 | fattr->cf_mode &= ~S_IFMT; |
364 | ||
365 | if (fattr->cf_eof == 0) { | |
366 | fattr->cf_mode |= S_IFIFO; | |
367 | fattr->cf_dtype = DT_FIFO; | |
d6e2f2a4 | 368 | return 0; |
0b8f18e3 JL |
369 | } else if (fattr->cf_eof < 8) { |
370 | fattr->cf_mode |= S_IFREG; | |
371 | fattr->cf_dtype = DT_REG; | |
d6e2f2a4 SF |
372 | return -EINVAL; /* EOPNOTSUPP? */ |
373 | } | |
50c2f753 | 374 | |
d6e2f2a4 SF |
375 | rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ, |
376 | CREATE_NOT_DIR, &netfid, &oplock, NULL, | |
377 | cifs_sb->local_nls, | |
378 | cifs_sb->mnt_cifs_flags & | |
379 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
fb8c4b14 | 380 | if (rc == 0) { |
ec637e3f | 381 | int buf_type = CIFS_NO_BUFFER; |
d6e2f2a4 | 382 | /* Read header */ |
0b8f18e3 | 383 | rc = CIFSSMBRead(xid, pTcon, netfid, |
86c96b4b | 384 | 24 /* length */, 0 /* offset */, |
ec637e3f | 385 | &bytes_read, &pbuf, &buf_type); |
4523cc30 SF |
386 | if ((rc == 0) && (bytes_read >= 8)) { |
387 | if (memcmp("IntxBLK", pbuf, 8) == 0) { | |
b6b38f70 | 388 | cFYI(1, "Block device"); |
0b8f18e3 JL |
389 | fattr->cf_mode |= S_IFBLK; |
390 | fattr->cf_dtype = DT_BLK; | |
4523cc30 | 391 | if (bytes_read == 24) { |
86c96b4b SF |
392 | /* we have enough to decode dev num */ |
393 | __u64 mjr; /* major */ | |
394 | __u64 mnr; /* minor */ | |
395 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); | |
396 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); | |
0b8f18e3 | 397 | fattr->cf_rdev = MKDEV(mjr, mnr); |
86c96b4b | 398 | } |
4523cc30 | 399 | } else if (memcmp("IntxCHR", pbuf, 8) == 0) { |
b6b38f70 | 400 | cFYI(1, "Char device"); |
0b8f18e3 JL |
401 | fattr->cf_mode |= S_IFCHR; |
402 | fattr->cf_dtype = DT_CHR; | |
4523cc30 | 403 | if (bytes_read == 24) { |
86c96b4b SF |
404 | /* we have enough to decode dev num */ |
405 | __u64 mjr; /* major */ | |
406 | __u64 mnr; /* minor */ | |
407 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); | |
408 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); | |
0b8f18e3 | 409 | fattr->cf_rdev = MKDEV(mjr, mnr); |
fb8c4b14 | 410 | } |
4523cc30 | 411 | } else if (memcmp("IntxLNK", pbuf, 7) == 0) { |
b6b38f70 | 412 | cFYI(1, "Symlink"); |
0b8f18e3 JL |
413 | fattr->cf_mode |= S_IFLNK; |
414 | fattr->cf_dtype = DT_LNK; | |
86c96b4b | 415 | } else { |
0b8f18e3 JL |
416 | fattr->cf_mode |= S_IFREG; /* file? */ |
417 | fattr->cf_dtype = DT_REG; | |
fb8c4b14 | 418 | rc = -EOPNOTSUPP; |
86c96b4b | 419 | } |
3020a1f5 | 420 | } else { |
0b8f18e3 JL |
421 | fattr->cf_mode |= S_IFREG; /* then it is a file */ |
422 | fattr->cf_dtype = DT_REG; | |
fb8c4b14 SF |
423 | rc = -EOPNOTSUPP; /* or some unknown SFU type */ |
424 | } | |
d6e2f2a4 | 425 | CIFSSMBClose(xid, pTcon, netfid); |
d6e2f2a4 SF |
426 | } |
427 | return rc; | |
d6e2f2a4 SF |
428 | } |
429 | ||
9e294f1c SF |
430 | #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */ |
431 | ||
0b8f18e3 JL |
432 | /* |
433 | * Fetch mode bits as provided by SFU. | |
434 | * | |
435 | * FIXME: Doesn't this clobber the type bit we got from cifs_sfu_type ? | |
436 | */ | |
437 | static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path, | |
438 | struct cifs_sb_info *cifs_sb, int xid) | |
9e294f1c | 439 | { |
3020a1f5 | 440 | #ifdef CONFIG_CIFS_XATTR |
9e294f1c SF |
441 | ssize_t rc; |
442 | char ea_value[4]; | |
443 | __u32 mode; | |
444 | ||
31c0519f | 445 | rc = CIFSSMBQAllEAs(xid, cifs_sb->tcon, path, "SETFILEBITS", |
0b8f18e3 JL |
446 | ea_value, 4 /* size of buf */, cifs_sb->local_nls, |
447 | cifs_sb->mnt_cifs_flags & | |
448 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
4523cc30 | 449 | if (rc < 0) |
9e294f1c SF |
450 | return (int)rc; |
451 | else if (rc > 3) { | |
452 | mode = le32_to_cpu(*((__le32 *)ea_value)); | |
0b8f18e3 | 453 | fattr->cf_mode &= ~SFBITS_MASK; |
b6b38f70 JP |
454 | cFYI(1, "special bits 0%o org mode 0%o", mode, |
455 | fattr->cf_mode); | |
0b8f18e3 | 456 | fattr->cf_mode = (mode & SFBITS_MASK) | fattr->cf_mode; |
b6b38f70 | 457 | cFYI(1, "special mode bits 0%o", mode); |
9e294f1c | 458 | } |
0b8f18e3 JL |
459 | |
460 | return 0; | |
3020a1f5 SF |
461 | #else |
462 | return -EOPNOTSUPP; | |
463 | #endif | |
9e294f1c SF |
464 | } |
465 | ||
0b8f18e3 | 466 | /* Fill a cifs_fattr struct with info from FILE_ALL_INFO */ |
f1230c97 | 467 | static void |
0b8f18e3 JL |
468 | cifs_all_info_to_fattr(struct cifs_fattr *fattr, FILE_ALL_INFO *info, |
469 | struct cifs_sb_info *cifs_sb, bool adjust_tz) | |
b9a3260f | 470 | { |
0b8f18e3 JL |
471 | memset(fattr, 0, sizeof(*fattr)); |
472 | fattr->cf_cifsattrs = le32_to_cpu(info->Attributes); | |
473 | if (info->DeletePending) | |
474 | fattr->cf_flags |= CIFS_FATTR_DELETE_PENDING; | |
475 | ||
476 | if (info->LastAccessTime) | |
477 | fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); | |
478 | else | |
479 | fattr->cf_atime = CURRENT_TIME; | |
480 | ||
481 | fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime); | |
482 | fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime); | |
483 | ||
484 | if (adjust_tz) { | |
485 | fattr->cf_ctime.tv_sec += cifs_sb->tcon->ses->server->timeAdj; | |
486 | fattr->cf_mtime.tv_sec += cifs_sb->tcon->ses->server->timeAdj; | |
487 | } | |
488 | ||
489 | fattr->cf_eof = le64_to_cpu(info->EndOfFile); | |
490 | fattr->cf_bytes = le64_to_cpu(info->AllocationSize); | |
491 | ||
492 | if (fattr->cf_cifsattrs & ATTR_DIRECTORY) { | |
493 | fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode; | |
494 | fattr->cf_dtype = DT_DIR; | |
495 | } else { | |
496 | fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode; | |
497 | fattr->cf_dtype = DT_REG; | |
0b8f18e3 | 498 | |
d0c280d2 JL |
499 | /* clear write bits if ATTR_READONLY is set */ |
500 | if (fattr->cf_cifsattrs & ATTR_READONLY) | |
501 | fattr->cf_mode &= ~(S_IWUGO); | |
502 | } | |
0b8f18e3 JL |
503 | |
504 | fattr->cf_nlink = le32_to_cpu(info->NumberOfLinks); | |
505 | ||
506 | fattr->cf_uid = cifs_sb->mnt_uid; | |
507 | fattr->cf_gid = cifs_sb->mnt_gid; | |
b9a3260f SF |
508 | } |
509 | ||
abab095d JL |
510 | int cifs_get_file_info(struct file *filp) |
511 | { | |
512 | int rc; | |
513 | int xid; | |
514 | FILE_ALL_INFO find_data; | |
515 | struct cifs_fattr fattr; | |
516 | struct inode *inode = filp->f_path.dentry->d_inode; | |
517 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
518 | struct cifsTconInfo *tcon = cifs_sb->tcon; | |
c21dfb69 | 519 | struct cifsFileInfo *cfile = filp->private_data; |
abab095d JL |
520 | |
521 | xid = GetXid(); | |
522 | rc = CIFSSMBQFileInfo(xid, tcon, cfile->netfid, &find_data); | |
523 | if (rc == -EOPNOTSUPP || rc == -EINVAL) { | |
524 | /* | |
525 | * FIXME: legacy server -- fall back to path-based call? | |
ff215713 SF |
526 | * for now, just skip revalidating and mark inode for |
527 | * immediate reval. | |
528 | */ | |
abab095d JL |
529 | rc = 0; |
530 | CIFS_I(inode)->time = 0; | |
531 | goto cgfi_exit; | |
532 | } else if (rc == -EREMOTE) { | |
533 | cifs_create_dfs_fattr(&fattr, inode->i_sb); | |
534 | rc = 0; | |
535 | } else if (rc) | |
536 | goto cgfi_exit; | |
537 | ||
538 | /* | |
539 | * don't bother with SFU junk here -- just mark inode as needing | |
540 | * revalidation. | |
541 | */ | |
542 | cifs_all_info_to_fattr(&fattr, &find_data, cifs_sb, false); | |
543 | fattr.cf_uniqueid = CIFS_I(inode)->uniqueid; | |
544 | fattr.cf_flags |= CIFS_FATTR_NEED_REVAL; | |
545 | cifs_fattr_to_inode(inode, &fattr); | |
546 | cgfi_exit: | |
547 | FreeXid(xid); | |
548 | return rc; | |
549 | } | |
550 | ||
1da177e4 | 551 | int cifs_get_inode_info(struct inode **pinode, |
646dd539 | 552 | const unsigned char *full_path, FILE_ALL_INFO *pfindData, |
8b1327f6 | 553 | struct super_block *sb, int xid, const __u16 *pfid) |
1da177e4 | 554 | { |
0b8f18e3 | 555 | int rc = 0, tmprc; |
1da177e4 | 556 | struct cifsTconInfo *pTcon; |
1da177e4 | 557 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
1da177e4 | 558 | char *buf = NULL; |
5ade9dea | 559 | bool adjustTZ = false; |
0b8f18e3 | 560 | struct cifs_fattr fattr; |
1da177e4 LT |
561 | |
562 | pTcon = cifs_sb->tcon; | |
b6b38f70 | 563 | cFYI(1, "Getting info on %s", full_path); |
1da177e4 | 564 | |
d0d2f2df SF |
565 | if ((pfindData == NULL) && (*pinode != NULL)) { |
566 | if (CIFS_I(*pinode)->clientCanCacheRead) { | |
b6b38f70 | 567 | cFYI(1, "No need to revalidate cached inode sizes"); |
1da177e4 LT |
568 | return rc; |
569 | } | |
570 | } | |
571 | ||
572 | /* if file info not passed in then get it from server */ | |
d0d2f2df | 573 | if (pfindData == NULL) { |
1da177e4 | 574 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
d0d2f2df | 575 | if (buf == NULL) |
1da177e4 LT |
576 | return -ENOMEM; |
577 | pfindData = (FILE_ALL_INFO *)buf; | |
7962670e | 578 | |
1da177e4 | 579 | /* could do find first instead but this returns more info */ |
7962670e | 580 | rc = CIFSSMBQPathInfo(xid, pTcon, full_path, pfindData, |
acf1a1b1 | 581 | 0 /* not legacy */, |
6b8edfe0 | 582 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
737b758c | 583 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
6b8edfe0 SF |
584 | /* BB optimize code so we do not make the above call |
585 | when server claims no NT SMB support and the above call | |
586 | failed at least once - set flag in tcon or mount */ | |
4523cc30 | 587 | if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) { |
7962670e | 588 | rc = SMBQueryInformation(xid, pTcon, full_path, |
fb8c4b14 | 589 | pfindData, cifs_sb->local_nls, |
6b8edfe0 SF |
590 | cifs_sb->mnt_cifs_flags & |
591 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
4b18f2a9 | 592 | adjustTZ = true; |
6b8edfe0 | 593 | } |
1da177e4 | 594 | } |
0b8f18e3 JL |
595 | |
596 | if (!rc) { | |
597 | cifs_all_info_to_fattr(&fattr, (FILE_ALL_INFO *) pfindData, | |
598 | cifs_sb, adjustTZ); | |
599 | } else if (rc == -EREMOTE) { | |
600 | cifs_create_dfs_fattr(&fattr, sb); | |
b9a3260f | 601 | rc = 0; |
0b8f18e3 | 602 | } else { |
7962670e | 603 | goto cgii_exit; |
0b8f18e3 | 604 | } |
1da177e4 | 605 | |
0b8f18e3 JL |
606 | /* |
607 | * If an inode wasn't passed in, then get the inode number | |
608 | * | |
609 | * Is an i_ino of zero legal? Can we use that to check if the server | |
610 | * supports returning inode numbers? Are there other sanity checks we | |
611 | * can use to ensure that the server is really filling in that field? | |
612 | * | |
613 | * We can not use the IndexNumber field by default from Windows or | |
614 | * Samba (in ALL_INFO buf) but we can request it explicitly. The SNIA | |
615 | * CIFS spec claims that this value is unique within the scope of a | |
616 | * share, and the windows docs hint that it's actually unique | |
617 | * per-machine. | |
618 | * | |
619 | * There may be higher info levels that work but are there Windows | |
620 | * server or network appliances for which IndexNumber field is not | |
621 | * guaranteed unique? | |
622 | */ | |
b9a3260f | 623 | if (*pinode == NULL) { |
b9a3260f SF |
624 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
625 | int rc1 = 0; | |
b9a3260f SF |
626 | |
627 | rc1 = CIFSGetSrvInodeNumber(xid, pTcon, | |
0b8f18e3 | 628 | full_path, &fattr.cf_uniqueid, |
737b758c SF |
629 | cifs_sb->local_nls, |
630 | cifs_sb->mnt_cifs_flags & | |
631 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
ec06aedd | 632 | if (rc1 || !fattr.cf_uniqueid) { |
b6b38f70 | 633 | cFYI(1, "GetSrvInodeNum rc %d", rc1); |
0b8f18e3 | 634 | fattr.cf_uniqueid = iunique(sb, ROOT_I); |
ec06aedd | 635 | cifs_autodisable_serverino(cifs_sb); |
132ac7b7 | 636 | } |
132ac7b7 | 637 | } else { |
0b8f18e3 | 638 | fattr.cf_uniqueid = iunique(sb, ROOT_I); |
132ac7b7 | 639 | } |
b9a3260f | 640 | } else { |
0b8f18e3 | 641 | fattr.cf_uniqueid = CIFS_I(*pinode)->uniqueid; |
b9a3260f SF |
642 | } |
643 | ||
0b8f18e3 JL |
644 | /* query for SFU type info if supported and needed */ |
645 | if (fattr.cf_cifsattrs & ATTR_SYSTEM && | |
646 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { | |
647 | tmprc = cifs_sfu_type(&fattr, full_path, cifs_sb, xid); | |
648 | if (tmprc) | |
b6b38f70 | 649 | cFYI(1, "cifs_sfu_type failed: %d", tmprc); |
b9a3260f | 650 | } |
1da177e4 | 651 | |
4879b448 | 652 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
b9a3260f SF |
653 | /* fill in 0777 bits from ACL */ |
654 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { | |
b6b38f70 | 655 | cFYI(1, "Getting mode bits from ACL"); |
0b8f18e3 | 656 | cifs_acl_to_fattr(cifs_sb, &fattr, *pinode, full_path, pfid); |
b9a3260f | 657 | } |
4879b448 | 658 | #endif |
b9a3260f | 659 | |
0b8f18e3 JL |
660 | /* fill in remaining high mode bits e.g. SUID, VTX */ |
661 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) | |
662 | cifs_sfu_mode(&fattr, full_path, cifs_sb, xid); | |
b9a3260f | 663 | |
0b8f18e3 JL |
664 | if (!*pinode) { |
665 | *pinode = cifs_iget(sb, &fattr); | |
666 | if (!*pinode) | |
667 | rc = -ENOMEM; | |
668 | } else { | |
669 | cifs_fattr_to_inode(*pinode, &fattr); | |
670 | } | |
b9a3260f | 671 | |
7962670e | 672 | cgii_exit: |
1da177e4 LT |
673 | kfree(buf); |
674 | return rc; | |
675 | } | |
676 | ||
7f8ed420 SF |
677 | static const struct inode_operations cifs_ipc_inode_ops = { |
678 | .lookup = cifs_lookup, | |
679 | }; | |
680 | ||
e4cce94c | 681 | char *cifs_build_path_to_root(struct cifs_sb_info *cifs_sb) |
8be0ed44 SF |
682 | { |
683 | int pplen = cifs_sb->prepathlen; | |
684 | int dfsplen; | |
685 | char *full_path = NULL; | |
686 | ||
687 | /* if no prefix path, simply set path to the root of share to "" */ | |
688 | if (pplen == 0) { | |
689 | full_path = kmalloc(1, GFP_KERNEL); | |
690 | if (full_path) | |
691 | full_path[0] = 0; | |
692 | return full_path; | |
693 | } | |
694 | ||
695 | if (cifs_sb->tcon && (cifs_sb->tcon->Flags & SMB_SHARE_IS_IN_DFS)) | |
696 | dfsplen = strnlen(cifs_sb->tcon->treeName, MAX_TREE_SIZE + 1); | |
697 | else | |
698 | dfsplen = 0; | |
699 | ||
700 | full_path = kmalloc(dfsplen + pplen + 1, GFP_KERNEL); | |
701 | if (full_path == NULL) | |
702 | return full_path; | |
703 | ||
704 | if (dfsplen) { | |
705 | strncpy(full_path, cifs_sb->tcon->treeName, dfsplen); | |
706 | /* switch slash direction in prepath depending on whether | |
707 | * windows or posix style path names | |
708 | */ | |
709 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) { | |
710 | int i; | |
711 | for (i = 0; i < dfsplen; i++) { | |
712 | if (full_path[i] == '\\') | |
713 | full_path[i] = '/'; | |
714 | } | |
715 | } | |
716 | } | |
717 | strncpy(full_path + dfsplen, cifs_sb->prepath, pplen); | |
718 | full_path[dfsplen + pplen] = 0; /* add trailing null */ | |
719 | return full_path; | |
720 | } | |
721 | ||
cc0bad75 JL |
722 | static int |
723 | cifs_find_inode(struct inode *inode, void *opaque) | |
724 | { | |
725 | struct cifs_fattr *fattr = (struct cifs_fattr *) opaque; | |
726 | ||
f30b9c11 | 727 | /* don't match inode with different uniqueid */ |
cc0bad75 JL |
728 | if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid) |
729 | return 0; | |
730 | ||
f30b9c11 JL |
731 | /* don't match inode of different type */ |
732 | if ((inode->i_mode & S_IFMT) != (fattr->cf_mode & S_IFMT)) | |
733 | return 0; | |
734 | ||
5acfec25 JL |
735 | /* if it's not a directory or has no dentries, then flag it */ |
736 | if (S_ISDIR(inode->i_mode) && !list_empty(&inode->i_dentry)) | |
3d694380 | 737 | fattr->cf_flags |= CIFS_FATTR_INO_COLLISION; |
3d694380 | 738 | |
cc0bad75 JL |
739 | return 1; |
740 | } | |
741 | ||
742 | static int | |
743 | cifs_init_inode(struct inode *inode, void *opaque) | |
744 | { | |
745 | struct cifs_fattr *fattr = (struct cifs_fattr *) opaque; | |
746 | ||
747 | CIFS_I(inode)->uniqueid = fattr->cf_uniqueid; | |
748 | return 0; | |
749 | } | |
750 | ||
5acfec25 JL |
751 | /* |
752 | * walk dentry list for an inode and report whether it has aliases that | |
753 | * are hashed. We use this to determine if a directory inode can actually | |
754 | * be used. | |
755 | */ | |
756 | static bool | |
757 | inode_has_hashed_dentries(struct inode *inode) | |
758 | { | |
759 | struct dentry *dentry; | |
760 | ||
761 | spin_lock(&dcache_lock); | |
762 | list_for_each_entry(dentry, &inode->i_dentry, d_alias) { | |
763 | if (!d_unhashed(dentry) || IS_ROOT(dentry)) { | |
764 | spin_unlock(&dcache_lock); | |
765 | return true; | |
766 | } | |
767 | } | |
768 | spin_unlock(&dcache_lock); | |
769 | return false; | |
770 | } | |
771 | ||
cc0bad75 JL |
772 | /* Given fattrs, get a corresponding inode */ |
773 | struct inode * | |
774 | cifs_iget(struct super_block *sb, struct cifs_fattr *fattr) | |
775 | { | |
776 | unsigned long hash; | |
777 | struct inode *inode; | |
778 | ||
3d694380 | 779 | retry_iget5_locked: |
b6b38f70 | 780 | cFYI(1, "looking for uniqueid=%llu", fattr->cf_uniqueid); |
cc0bad75 JL |
781 | |
782 | /* hash down to 32-bits on 32-bit arch */ | |
783 | hash = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid); | |
784 | ||
785 | inode = iget5_locked(sb, hash, cifs_find_inode, cifs_init_inode, fattr); | |
cc0bad75 | 786 | if (inode) { |
5acfec25 | 787 | /* was there a potentially problematic inode collision? */ |
3d694380 | 788 | if (fattr->cf_flags & CIFS_FATTR_INO_COLLISION) { |
3d694380 | 789 | fattr->cf_flags &= ~CIFS_FATTR_INO_COLLISION; |
5acfec25 JL |
790 | |
791 | if (inode_has_hashed_dentries(inode)) { | |
792 | cifs_autodisable_serverino(CIFS_SB(sb)); | |
793 | iput(inode); | |
794 | fattr->cf_uniqueid = iunique(sb, ROOT_I); | |
795 | goto retry_iget5_locked; | |
796 | } | |
3d694380 JL |
797 | } |
798 | ||
cc0bad75 JL |
799 | cifs_fattr_to_inode(inode, fattr); |
800 | if (sb->s_flags & MS_NOATIME) | |
801 | inode->i_flags |= S_NOATIME | S_NOCMTIME; | |
802 | if (inode->i_state & I_NEW) { | |
803 | inode->i_ino = hash; | |
522440ed JL |
804 | if (S_ISREG(inode->i_mode)) |
805 | inode->i_data.backing_dev_info = sb->s_bdi; | |
0ccd4802 | 806 | #ifdef CONFIG_CIFS_FSCACHE |
9451a9a5 SJ |
807 | /* initialize per-inode cache cookie pointer */ |
808 | CIFS_I(inode)->fscache = NULL; | |
0ccd4802 | 809 | #endif |
cc0bad75 JL |
810 | unlock_new_inode(inode); |
811 | } | |
812 | } | |
813 | ||
814 | return inode; | |
815 | } | |
816 | ||
1da177e4 | 817 | /* gets root inode */ |
bd433d4c | 818 | struct inode *cifs_root_iget(struct super_block *sb, unsigned long ino) |
1da177e4 | 819 | { |
ce634ab2 | 820 | int xid; |
1da177e4 | 821 | struct cifs_sb_info *cifs_sb; |
cc0bad75 | 822 | struct inode *inode = NULL; |
ce634ab2 | 823 | long rc; |
8be0ed44 | 824 | char *full_path; |
ce634ab2 | 825 | |
cc0bad75 | 826 | cifs_sb = CIFS_SB(sb); |
e4cce94c | 827 | full_path = cifs_build_path_to_root(cifs_sb); |
8be0ed44 SF |
828 | if (full_path == NULL) |
829 | return ERR_PTR(-ENOMEM); | |
c18c842b | 830 | |
8be0ed44 | 831 | xid = GetXid(); |
0b8f18e3 | 832 | if (cifs_sb->tcon->unix_ext) |
cc0bad75 | 833 | rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid); |
0b8f18e3 JL |
834 | else |
835 | rc = cifs_get_inode_info(&inode, full_path, NULL, sb, | |
8be0ed44 | 836 | xid, NULL); |
0b8f18e3 JL |
837 | |
838 | if (!inode) | |
f0138a79 | 839 | return ERR_PTR(rc); |
cc0bad75 | 840 | |
0ccd4802 | 841 | #ifdef CONFIG_CIFS_FSCACHE |
d03382ce SJ |
842 | /* populate tcon->resource_id */ |
843 | cifs_sb->tcon->resource_id = CIFS_I(inode)->uniqueid; | |
0ccd4802 | 844 | #endif |
d03382ce | 845 | |
7f8ed420 | 846 | if (rc && cifs_sb->tcon->ipc) { |
b6b38f70 | 847 | cFYI(1, "ipc connection - fake read inode"); |
7f8ed420 SF |
848 | inode->i_mode |= S_IFDIR; |
849 | inode->i_nlink = 2; | |
850 | inode->i_op = &cifs_ipc_inode_ops; | |
851 | inode->i_fop = &simple_dir_operations; | |
852 | inode->i_uid = cifs_sb->mnt_uid; | |
853 | inode->i_gid = cifs_sb->mnt_gid; | |
ad661334 | 854 | } else if (rc) { |
8be0ed44 | 855 | kfree(full_path); |
ce634ab2 DH |
856 | _FreeXid(xid); |
857 | iget_failed(inode); | |
858 | return ERR_PTR(rc); | |
7f8ed420 SF |
859 | } |
860 | ||
ce634ab2 | 861 | |
8be0ed44 | 862 | kfree(full_path); |
ce634ab2 DH |
863 | /* can not call macro FreeXid here since in a void func |
864 | * TODO: This is no longer true | |
865 | */ | |
1da177e4 | 866 | _FreeXid(xid); |
ce634ab2 | 867 | return inode; |
1da177e4 LT |
868 | } |
869 | ||
388e57b2 SF |
870 | static int |
871 | cifs_set_file_info(struct inode *inode, struct iattr *attrs, int xid, | |
872 | char *full_path, __u32 dosattr) | |
873 | { | |
874 | int rc; | |
875 | int oplock = 0; | |
876 | __u16 netfid; | |
877 | __u32 netpid; | |
878 | bool set_time = false; | |
879 | struct cifsFileInfo *open_file; | |
880 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); | |
881 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
882 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
883 | FILE_BASIC_INFO info_buf; | |
884 | ||
1adcb710 SF |
885 | if (attrs == NULL) |
886 | return -EINVAL; | |
887 | ||
388e57b2 SF |
888 | if (attrs->ia_valid & ATTR_ATIME) { |
889 | set_time = true; | |
890 | info_buf.LastAccessTime = | |
891 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime)); | |
892 | } else | |
893 | info_buf.LastAccessTime = 0; | |
894 | ||
895 | if (attrs->ia_valid & ATTR_MTIME) { | |
896 | set_time = true; | |
897 | info_buf.LastWriteTime = | |
898 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime)); | |
899 | } else | |
900 | info_buf.LastWriteTime = 0; | |
901 | ||
902 | /* | |
903 | * Samba throws this field away, but windows may actually use it. | |
904 | * Do not set ctime unless other time stamps are changed explicitly | |
905 | * (i.e. by utimes()) since we would then have a mix of client and | |
906 | * server times. | |
907 | */ | |
908 | if (set_time && (attrs->ia_valid & ATTR_CTIME)) { | |
b6b38f70 | 909 | cFYI(1, "CIFS - CTIME changed"); |
388e57b2 SF |
910 | info_buf.ChangeTime = |
911 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime)); | |
912 | } else | |
913 | info_buf.ChangeTime = 0; | |
914 | ||
915 | info_buf.CreationTime = 0; /* don't change */ | |
916 | info_buf.Attributes = cpu_to_le32(dosattr); | |
917 | ||
918 | /* | |
919 | * If the file is already open for write, just use that fileid | |
920 | */ | |
921 | open_file = find_writable_file(cifsInode); | |
922 | if (open_file) { | |
923 | netfid = open_file->netfid; | |
924 | netpid = open_file->pid; | |
925 | goto set_via_filehandle; | |
926 | } | |
927 | ||
928 | /* | |
929 | * NT4 apparently returns success on this call, but it doesn't | |
930 | * really work. | |
931 | */ | |
932 | if (!(pTcon->ses->flags & CIFS_SES_NT4)) { | |
933 | rc = CIFSSMBSetPathInfo(xid, pTcon, full_path, | |
934 | &info_buf, cifs_sb->local_nls, | |
935 | cifs_sb->mnt_cifs_flags & | |
936 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
6b37faa1 JL |
937 | if (rc == 0) { |
938 | cifsInode->cifsAttrs = dosattr; | |
939 | goto out; | |
940 | } else if (rc != -EOPNOTSUPP && rc != -EINVAL) | |
388e57b2 SF |
941 | goto out; |
942 | } | |
943 | ||
b6b38f70 JP |
944 | cFYI(1, "calling SetFileInfo since SetPathInfo for " |
945 | "times not supported by this server"); | |
388e57b2 SF |
946 | rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, |
947 | SYNCHRONIZE | FILE_WRITE_ATTRIBUTES, | |
948 | CREATE_NOT_DIR, &netfid, &oplock, | |
949 | NULL, cifs_sb->local_nls, | |
950 | cifs_sb->mnt_cifs_flags & | |
951 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
952 | ||
953 | if (rc != 0) { | |
954 | if (rc == -EIO) | |
955 | rc = -EINVAL; | |
956 | goto out; | |
957 | } | |
958 | ||
959 | netpid = current->tgid; | |
960 | ||
961 | set_via_filehandle: | |
962 | rc = CIFSSMBSetFileInfo(xid, pTcon, &info_buf, netfid, netpid); | |
d388908e SF |
963 | if (!rc) |
964 | cifsInode->cifsAttrs = dosattr; | |
965 | ||
388e57b2 SF |
966 | if (open_file == NULL) |
967 | CIFSSMBClose(xid, pTcon, netfid); | |
968 | else | |
6ab409b5 | 969 | cifsFileInfo_put(open_file); |
388e57b2 SF |
970 | out: |
971 | return rc; | |
972 | } | |
973 | ||
a12a1ac7 JL |
974 | /* |
975 | * open the given file (if it isn't already), set the DELETE_ON_CLOSE bit | |
976 | * and rename it to a random name that hopefully won't conflict with | |
977 | * anything else. | |
978 | */ | |
979 | static int | |
3270958b | 980 | cifs_rename_pending_delete(char *full_path, struct dentry *dentry, int xid) |
a12a1ac7 JL |
981 | { |
982 | int oplock = 0; | |
983 | int rc; | |
984 | __u16 netfid; | |
3270958b | 985 | struct inode *inode = dentry->d_inode; |
a12a1ac7 JL |
986 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
987 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
988 | struct cifsTconInfo *tcon = cifs_sb->tcon; | |
3270958b SF |
989 | __u32 dosattr, origattr; |
990 | FILE_BASIC_INFO *info_buf = NULL; | |
a12a1ac7 JL |
991 | |
992 | rc = CIFSSMBOpen(xid, tcon, full_path, FILE_OPEN, | |
dd1db2de | 993 | DELETE|FILE_WRITE_ATTRIBUTES, CREATE_NOT_DIR, |
a12a1ac7 JL |
994 | &netfid, &oplock, NULL, cifs_sb->local_nls, |
995 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
996 | if (rc != 0) | |
997 | goto out; | |
998 | ||
3270958b SF |
999 | origattr = cifsInode->cifsAttrs; |
1000 | if (origattr == 0) | |
1001 | origattr |= ATTR_NORMAL; | |
1002 | ||
1003 | dosattr = origattr & ~ATTR_READONLY; | |
a12a1ac7 JL |
1004 | if (dosattr == 0) |
1005 | dosattr |= ATTR_NORMAL; | |
1006 | dosattr |= ATTR_HIDDEN; | |
1007 | ||
3270958b SF |
1008 | /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */ |
1009 | if (dosattr != origattr) { | |
1010 | info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL); | |
1011 | if (info_buf == NULL) { | |
1012 | rc = -ENOMEM; | |
1013 | goto out_close; | |
1014 | } | |
1015 | info_buf->Attributes = cpu_to_le32(dosattr); | |
1016 | rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid, | |
1017 | current->tgid); | |
1018 | /* although we would like to mark the file hidden | |
1019 | if that fails we will still try to rename it */ | |
41346098 | 1020 | if (rc != 0) |
3270958b SF |
1021 | cifsInode->cifsAttrs = dosattr; |
1022 | else | |
1023 | dosattr = origattr; /* since not able to change them */ | |
a12a1ac7 | 1024 | } |
a12a1ac7 | 1025 | |
dd1db2de JL |
1026 | /* rename the file */ |
1027 | rc = CIFSSMBRenameOpenFile(xid, tcon, netfid, NULL, cifs_sb->local_nls, | |
a12a1ac7 JL |
1028 | cifs_sb->mnt_cifs_flags & |
1029 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
3270958b SF |
1030 | if (rc != 0) { |
1031 | rc = -ETXTBSY; | |
1032 | goto undo_setattr; | |
1033 | } | |
6d22f098 | 1034 | |
3270958b SF |
1035 | /* try to set DELETE_ON_CLOSE */ |
1036 | if (!cifsInode->delete_pending) { | |
1037 | rc = CIFSSMBSetFileDisposition(xid, tcon, true, netfid, | |
1038 | current->tgid); | |
1039 | /* | |
1040 | * some samba versions return -ENOENT when we try to set the | |
1041 | * file disposition here. Likely a samba bug, but work around | |
1042 | * it for now. This means that some cifsXXX files may hang | |
1043 | * around after they shouldn't. | |
1044 | * | |
1045 | * BB: remove this hack after more servers have the fix | |
1046 | */ | |
1047 | if (rc == -ENOENT) | |
1048 | rc = 0; | |
1049 | else if (rc != 0) { | |
1050 | rc = -ETXTBSY; | |
1051 | goto undo_rename; | |
1052 | } | |
1053 | cifsInode->delete_pending = true; | |
1054 | } | |
7ce86d5a | 1055 | |
a12a1ac7 JL |
1056 | out_close: |
1057 | CIFSSMBClose(xid, tcon, netfid); | |
1058 | out: | |
3270958b | 1059 | kfree(info_buf); |
a12a1ac7 | 1060 | return rc; |
3270958b SF |
1061 | |
1062 | /* | |
1063 | * reset everything back to the original state. Don't bother | |
1064 | * dealing with errors here since we can't do anything about | |
1065 | * them anyway. | |
1066 | */ | |
1067 | undo_rename: | |
1068 | CIFSSMBRenameOpenFile(xid, tcon, netfid, dentry->d_name.name, | |
1069 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
1070 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1071 | undo_setattr: | |
1072 | if (dosattr != origattr) { | |
1073 | info_buf->Attributes = cpu_to_le32(origattr); | |
1074 | if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid, | |
1075 | current->tgid)) | |
1076 | cifsInode->cifsAttrs = origattr; | |
1077 | } | |
1078 | ||
1079 | goto out_close; | |
a12a1ac7 JL |
1080 | } |
1081 | ||
ff694527 SF |
1082 | |
1083 | /* | |
1084 | * If dentry->d_inode is null (usually meaning the cached dentry | |
1085 | * is a negative dentry) then we would attempt a standard SMB delete, but | |
af901ca1 AGR |
1086 | * if that fails we can not attempt the fall back mechanisms on EACCESS |
1087 | * but will return the EACCESS to the caller. Note that the VFS does not call | |
ff694527 SF |
1088 | * unlink on negative dentries currently. |
1089 | */ | |
5f0319a7 | 1090 | int cifs_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
1091 | { |
1092 | int rc = 0; | |
1093 | int xid; | |
1da177e4 | 1094 | char *full_path = NULL; |
5f0319a7 | 1095 | struct inode *inode = dentry->d_inode; |
ff694527 | 1096 | struct cifsInodeInfo *cifs_inode; |
5f0319a7 JL |
1097 | struct super_block *sb = dir->i_sb; |
1098 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
1099 | struct cifsTconInfo *tcon = cifs_sb->tcon; | |
6050247d SF |
1100 | struct iattr *attrs = NULL; |
1101 | __u32 dosattr = 0, origattr = 0; | |
1da177e4 | 1102 | |
b6b38f70 | 1103 | cFYI(1, "cifs_unlink, dir=0x%p, dentry=0x%p", dir, dentry); |
1da177e4 LT |
1104 | |
1105 | xid = GetXid(); | |
1106 | ||
5f0319a7 JL |
1107 | /* Unlink can be called from rename so we can not take the |
1108 | * sb->s_vfs_rename_mutex here */ | |
1109 | full_path = build_path_from_dentry(dentry); | |
1da177e4 | 1110 | if (full_path == NULL) { |
0f3bc09e | 1111 | rc = -ENOMEM; |
1da177e4 | 1112 | FreeXid(xid); |
0f3bc09e | 1113 | return rc; |
1da177e4 | 1114 | } |
2d785a50 | 1115 | |
5f0319a7 | 1116 | if ((tcon->ses->capabilities & CAP_UNIX) && |
2d785a50 | 1117 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
5f0319a7 JL |
1118 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { |
1119 | rc = CIFSPOSIXDelFile(xid, tcon, full_path, | |
2d785a50 | 1120 | SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls, |
737b758c | 1121 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
b6b38f70 | 1122 | cFYI(1, "posix del rc %d", rc); |
2d785a50 SF |
1123 | if ((rc == 0) || (rc == -ENOENT)) |
1124 | goto psx_del_no_retry; | |
1125 | } | |
1da177e4 | 1126 | |
6050247d | 1127 | retry_std_delete: |
5f0319a7 | 1128 | rc = CIFSSMBDelFile(xid, tcon, full_path, cifs_sb->local_nls, |
2d785a50 | 1129 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
6050247d | 1130 | |
2d785a50 | 1131 | psx_del_no_retry: |
1da177e4 | 1132 | if (!rc) { |
5f0319a7 JL |
1133 | if (inode) |
1134 | drop_nlink(inode); | |
1da177e4 | 1135 | } else if (rc == -ENOENT) { |
5f0319a7 | 1136 | d_drop(dentry); |
1da177e4 | 1137 | } else if (rc == -ETXTBSY) { |
3270958b | 1138 | rc = cifs_rename_pending_delete(full_path, dentry, xid); |
a12a1ac7 JL |
1139 | if (rc == 0) |
1140 | drop_nlink(inode); | |
ff694527 | 1141 | } else if ((rc == -EACCES) && (dosattr == 0) && inode) { |
388e57b2 SF |
1142 | attrs = kzalloc(sizeof(*attrs), GFP_KERNEL); |
1143 | if (attrs == NULL) { | |
1144 | rc = -ENOMEM; | |
1145 | goto out_reval; | |
1da177e4 | 1146 | } |
388e57b2 SF |
1147 | |
1148 | /* try to reset dos attributes */ | |
ff694527 SF |
1149 | cifs_inode = CIFS_I(inode); |
1150 | origattr = cifs_inode->cifsAttrs; | |
6050247d SF |
1151 | if (origattr == 0) |
1152 | origattr |= ATTR_NORMAL; | |
1153 | dosattr = origattr & ~ATTR_READONLY; | |
388e57b2 SF |
1154 | if (dosattr == 0) |
1155 | dosattr |= ATTR_NORMAL; | |
1156 | dosattr |= ATTR_HIDDEN; | |
1157 | ||
1158 | rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); | |
388e57b2 SF |
1159 | if (rc != 0) |
1160 | goto out_reval; | |
6050247d SF |
1161 | |
1162 | goto retry_std_delete; | |
1da177e4 | 1163 | } |
6050247d SF |
1164 | |
1165 | /* undo the setattr if we errored out and it's needed */ | |
1166 | if (rc != 0 && dosattr != 0) | |
1167 | cifs_set_file_info(inode, attrs, xid, full_path, origattr); | |
1168 | ||
388e57b2 | 1169 | out_reval: |
4523cc30 | 1170 | if (inode) { |
ff694527 SF |
1171 | cifs_inode = CIFS_I(inode); |
1172 | cifs_inode->time = 0; /* will force revalidate to get info | |
5f0319a7 JL |
1173 | when needed */ |
1174 | inode->i_ctime = current_fs_time(sb); | |
06bcfedd | 1175 | } |
5f0319a7 | 1176 | dir->i_ctime = dir->i_mtime = current_fs_time(sb); |
ff694527 | 1177 | cifs_inode = CIFS_I(dir); |
6050247d | 1178 | CIFS_I(dir)->time = 0; /* force revalidate of dir as well */ |
1da177e4 LT |
1179 | |
1180 | kfree(full_path); | |
6050247d | 1181 | kfree(attrs); |
1da177e4 LT |
1182 | FreeXid(xid); |
1183 | return rc; | |
1184 | } | |
1185 | ||
1186 | int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode) | |
1187 | { | |
6b37faa1 | 1188 | int rc = 0, tmprc; |
1da177e4 LT |
1189 | int xid; |
1190 | struct cifs_sb_info *cifs_sb; | |
1191 | struct cifsTconInfo *pTcon; | |
1192 | char *full_path = NULL; | |
1193 | struct inode *newinode = NULL; | |
cc0bad75 | 1194 | struct cifs_fattr fattr; |
1da177e4 | 1195 | |
b6b38f70 | 1196 | cFYI(1, "In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode); |
1da177e4 LT |
1197 | |
1198 | xid = GetXid(); | |
1199 | ||
1200 | cifs_sb = CIFS_SB(inode->i_sb); | |
1201 | pTcon = cifs_sb->tcon; | |
1202 | ||
7f57356b | 1203 | full_path = build_path_from_dentry(direntry); |
1da177e4 | 1204 | if (full_path == NULL) { |
0f3bc09e | 1205 | rc = -ENOMEM; |
1da177e4 | 1206 | FreeXid(xid); |
0f3bc09e | 1207 | return rc; |
1da177e4 | 1208 | } |
50c2f753 | 1209 | |
fb8c4b14 SF |
1210 | if ((pTcon->ses->capabilities & CAP_UNIX) && |
1211 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & | |
2dd29d31 SF |
1212 | le64_to_cpu(pTcon->fsUnixInfo.Capability))) { |
1213 | u32 oplock = 0; | |
f6d09982 | 1214 | FILE_UNIX_BASIC_INFO *pInfo = |
2dd29d31 | 1215 | kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL); |
fb8c4b14 | 1216 | if (pInfo == NULL) { |
2dd29d31 SF |
1217 | rc = -ENOMEM; |
1218 | goto mkdir_out; | |
1219 | } | |
50c2f753 | 1220 | |
ce3b0f8d | 1221 | mode &= ~current_umask(); |
2dd29d31 SF |
1222 | rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT, |
1223 | mode, NULL /* netfid */, pInfo, &oplock, | |
fb8c4b14 SF |
1224 | full_path, cifs_sb->local_nls, |
1225 | cifs_sb->mnt_cifs_flags & | |
2dd29d31 | 1226 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
c45d707f SF |
1227 | if (rc == -EOPNOTSUPP) { |
1228 | kfree(pInfo); | |
1229 | goto mkdir_retry_old; | |
1230 | } else if (rc) { | |
b6b38f70 | 1231 | cFYI(1, "posix mkdir returned 0x%x", rc); |
2dd29d31 SF |
1232 | d_drop(direntry); |
1233 | } else { | |
8f2376ad CG |
1234 | if (pInfo->Type == cpu_to_le32(-1)) { |
1235 | /* no return info, go query for it */ | |
5a07cdf8 | 1236 | kfree(pInfo); |
fb8c4b14 | 1237 | goto mkdir_get_info; |
5a07cdf8 | 1238 | } |
fb8c4b14 SF |
1239 | /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need |
1240 | to set uid/gid */ | |
2dd29d31 SF |
1241 | inc_nlink(inode); |
1242 | if (pTcon->nocase) | |
1243 | direntry->d_op = &cifs_ci_dentry_ops; | |
1244 | else | |
1245 | direntry->d_op = &cifs_dentry_ops; | |
cbac3cba | 1246 | |
cc0bad75 | 1247 | cifs_unix_basic_to_fattr(&fattr, pInfo, cifs_sb); |
4065c802 | 1248 | cifs_fill_uniqueid(inode->i_sb, &fattr); |
cc0bad75 JL |
1249 | newinode = cifs_iget(inode->i_sb, &fattr); |
1250 | if (!newinode) { | |
5a07cdf8 | 1251 | kfree(pInfo); |
cbac3cba | 1252 | goto mkdir_get_info; |
5a07cdf8 | 1253 | } |
6b37faa1 | 1254 | |
2dd29d31 | 1255 | d_instantiate(direntry, newinode); |
cbac3cba | 1256 | |
cbac3cba | 1257 | #ifdef CONFIG_CIFS_DEBUG2 |
b6b38f70 JP |
1258 | cFYI(1, "instantiated dentry %p %s to inode %p", |
1259 | direntry, direntry->d_name.name, newinode); | |
cbac3cba | 1260 | |
fb8c4b14 | 1261 | if (newinode->i_nlink != 2) |
b6b38f70 JP |
1262 | cFYI(1, "unexpected number of links %d", |
1263 | newinode->i_nlink); | |
cbac3cba | 1264 | #endif |
2dd29d31 SF |
1265 | } |
1266 | kfree(pInfo); | |
1267 | goto mkdir_out; | |
fb8c4b14 | 1268 | } |
c45d707f | 1269 | mkdir_retry_old: |
1da177e4 | 1270 | /* BB add setting the equivalent of mode via CreateX w/ACLs */ |
737b758c SF |
1271 | rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls, |
1272 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 | 1273 | if (rc) { |
b6b38f70 | 1274 | cFYI(1, "cifs_mkdir returned 0x%x", rc); |
1da177e4 LT |
1275 | d_drop(direntry); |
1276 | } else { | |
fb8c4b14 | 1277 | mkdir_get_info: |
d8c76e6f | 1278 | inc_nlink(inode); |
c18c842b | 1279 | if (pTcon->unix_ext) |
1da177e4 | 1280 | rc = cifs_get_inode_info_unix(&newinode, full_path, |
fb8c4b14 | 1281 | inode->i_sb, xid); |
1da177e4 LT |
1282 | else |
1283 | rc = cifs_get_inode_info(&newinode, full_path, NULL, | |
8b1327f6 | 1284 | inode->i_sb, xid, NULL); |
1da177e4 | 1285 | |
b92327fe SF |
1286 | if (pTcon->nocase) |
1287 | direntry->d_op = &cifs_ci_dentry_ops; | |
1288 | else | |
1289 | direntry->d_op = &cifs_dentry_ops; | |
1da177e4 | 1290 | d_instantiate(direntry, newinode); |
2dd29d31 | 1291 | /* setting nlink not necessary except in cases where we |
fb8c4b14 | 1292 | * failed to get it from the server or was set bogus */ |
2dd29d31 | 1293 | if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2)) |
fb8c4b14 | 1294 | direntry->d_inode->i_nlink = 2; |
95089910 | 1295 | |
ce3b0f8d | 1296 | mode &= ~current_umask(); |
95089910 JL |
1297 | /* must turn on setgid bit if parent dir has it */ |
1298 | if (inode->i_mode & S_ISGID) | |
1299 | mode |= S_ISGID; | |
1300 | ||
c18c842b | 1301 | if (pTcon->unix_ext) { |
4e1e7fb9 JL |
1302 | struct cifs_unix_set_info_args args = { |
1303 | .mode = mode, | |
1304 | .ctime = NO_CHANGE_64, | |
1305 | .atime = NO_CHANGE_64, | |
1306 | .mtime = NO_CHANGE_64, | |
1307 | .device = 0, | |
1308 | }; | |
d0d2f2df | 1309 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
a001e5b5 | 1310 | args.uid = (__u64)current_fsuid(); |
95089910 JL |
1311 | if (inode->i_mode & S_ISGID) |
1312 | args.gid = (__u64)inode->i_gid; | |
1313 | else | |
a001e5b5 | 1314 | args.gid = (__u64)current_fsgid(); |
1da177e4 | 1315 | } else { |
4e1e7fb9 JL |
1316 | args.uid = NO_CHANGE_64; |
1317 | args.gid = NO_CHANGE_64; | |
1da177e4 | 1318 | } |
01ea95e3 JL |
1319 | CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, &args, |
1320 | cifs_sb->local_nls, | |
1321 | cifs_sb->mnt_cifs_flags & | |
1322 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
3ce53fc4 | 1323 | } else { |
67750fb9 JL |
1324 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) && |
1325 | (mode & S_IWUGO) == 0) { | |
1326 | FILE_BASIC_INFO pInfo; | |
6b37faa1 JL |
1327 | struct cifsInodeInfo *cifsInode; |
1328 | u32 dosattrs; | |
1329 | ||
67750fb9 | 1330 | memset(&pInfo, 0, sizeof(pInfo)); |
6b37faa1 JL |
1331 | cifsInode = CIFS_I(newinode); |
1332 | dosattrs = cifsInode->cifsAttrs|ATTR_READONLY; | |
1333 | pInfo.Attributes = cpu_to_le32(dosattrs); | |
1334 | tmprc = CIFSSMBSetPathInfo(xid, pTcon, | |
1335 | full_path, &pInfo, | |
1336 | cifs_sb->local_nls, | |
67750fb9 JL |
1337 | cifs_sb->mnt_cifs_flags & |
1338 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
6b37faa1 JL |
1339 | if (tmprc == 0) |
1340 | cifsInode->cifsAttrs = dosattrs; | |
67750fb9 | 1341 | } |
fb8c4b14 | 1342 | if (direntry->d_inode) { |
b0fd30d3 JL |
1343 | if (cifs_sb->mnt_cifs_flags & |
1344 | CIFS_MOUNT_DYNPERM) | |
1345 | direntry->d_inode->i_mode = | |
1346 | (mode | S_IFDIR); | |
4e94a105 | 1347 | |
fb8c4b14 | 1348 | if (cifs_sb->mnt_cifs_flags & |
6473a559 | 1349 | CIFS_MOUNT_SET_UID) { |
fb8c4b14 | 1350 | direntry->d_inode->i_uid = |
a001e5b5 | 1351 | current_fsuid(); |
95089910 JL |
1352 | if (inode->i_mode & S_ISGID) |
1353 | direntry->d_inode->i_gid = | |
1354 | inode->i_gid; | |
1355 | else | |
1356 | direntry->d_inode->i_gid = | |
a001e5b5 | 1357 | current_fsgid(); |
6473a559 SF |
1358 | } |
1359 | } | |
2a138ebb | 1360 | } |
1da177e4 | 1361 | } |
fb8c4b14 | 1362 | mkdir_out: |
1da177e4 LT |
1363 | kfree(full_path); |
1364 | FreeXid(xid); | |
1365 | return rc; | |
1366 | } | |
1367 | ||
1368 | int cifs_rmdir(struct inode *inode, struct dentry *direntry) | |
1369 | { | |
1370 | int rc = 0; | |
1371 | int xid; | |
1372 | struct cifs_sb_info *cifs_sb; | |
1373 | struct cifsTconInfo *pTcon; | |
1374 | char *full_path = NULL; | |
1375 | struct cifsInodeInfo *cifsInode; | |
1376 | ||
b6b38f70 | 1377 | cFYI(1, "cifs_rmdir, inode = 0x%p", inode); |
1da177e4 LT |
1378 | |
1379 | xid = GetXid(); | |
1380 | ||
1381 | cifs_sb = CIFS_SB(inode->i_sb); | |
1382 | pTcon = cifs_sb->tcon; | |
1383 | ||
7f57356b | 1384 | full_path = build_path_from_dentry(direntry); |
1da177e4 | 1385 | if (full_path == NULL) { |
0f3bc09e | 1386 | rc = -ENOMEM; |
1da177e4 | 1387 | FreeXid(xid); |
0f3bc09e | 1388 | return rc; |
1da177e4 LT |
1389 | } |
1390 | ||
737b758c SF |
1391 | rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls, |
1392 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
1393 | |
1394 | if (!rc) { | |
9a53c3a7 | 1395 | drop_nlink(inode); |
3677db10 | 1396 | spin_lock(&direntry->d_inode->i_lock); |
fb8c4b14 | 1397 | i_size_write(direntry->d_inode, 0); |
ce71ec36 | 1398 | clear_nlink(direntry->d_inode); |
3677db10 | 1399 | spin_unlock(&direntry->d_inode->i_lock); |
1da177e4 LT |
1400 | } |
1401 | ||
1402 | cifsInode = CIFS_I(direntry->d_inode); | |
1403 | cifsInode->time = 0; /* force revalidate to go get info when | |
1404 | needed */ | |
42c24544 SF |
1405 | |
1406 | cifsInode = CIFS_I(inode); | |
1407 | cifsInode->time = 0; /* force revalidate to get parent dir info | |
1408 | since cached search results now invalid */ | |
1409 | ||
1da177e4 LT |
1410 | direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime = |
1411 | current_fs_time(inode->i_sb); | |
1412 | ||
1413 | kfree(full_path); | |
1414 | FreeXid(xid); | |
1415 | return rc; | |
1416 | } | |
1417 | ||
ee2fd967 SF |
1418 | static int |
1419 | cifs_do_rename(int xid, struct dentry *from_dentry, const char *fromPath, | |
1420 | struct dentry *to_dentry, const char *toPath) | |
1421 | { | |
1422 | struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb); | |
1423 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
1424 | __u16 srcfid; | |
1425 | int oplock, rc; | |
1426 | ||
1427 | /* try path-based rename first */ | |
1428 | rc = CIFSSMBRename(xid, pTcon, fromPath, toPath, cifs_sb->local_nls, | |
1429 | cifs_sb->mnt_cifs_flags & | |
1430 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1431 | ||
1432 | /* | |
1433 | * don't bother with rename by filehandle unless file is busy and | |
1434 | * source Note that cross directory moves do not work with | |
1435 | * rename by filehandle to various Windows servers. | |
1436 | */ | |
1437 | if (rc == 0 || rc != -ETXTBSY) | |
1438 | return rc; | |
1439 | ||
ed0e3ace JL |
1440 | /* open-file renames don't work across directories */ |
1441 | if (to_dentry->d_parent != from_dentry->d_parent) | |
1442 | return rc; | |
1443 | ||
ee2fd967 SF |
1444 | /* open the file to be renamed -- we need DELETE perms */ |
1445 | rc = CIFSSMBOpen(xid, pTcon, fromPath, FILE_OPEN, DELETE, | |
1446 | CREATE_NOT_DIR, &srcfid, &oplock, NULL, | |
1447 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
1448 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1449 | ||
1450 | if (rc == 0) { | |
1451 | rc = CIFSSMBRenameOpenFile(xid, pTcon, srcfid, | |
1452 | (const char *) to_dentry->d_name.name, | |
1453 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
1454 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1455 | ||
1456 | CIFSSMBClose(xid, pTcon, srcfid); | |
1457 | } | |
1458 | ||
1459 | return rc; | |
1460 | } | |
1461 | ||
14121bdc JL |
1462 | int cifs_rename(struct inode *source_dir, struct dentry *source_dentry, |
1463 | struct inode *target_dir, struct dentry *target_dentry) | |
1da177e4 | 1464 | { |
ee2fd967 SF |
1465 | char *fromName = NULL; |
1466 | char *toName = NULL; | |
639e7a91 | 1467 | struct cifs_sb_info *cifs_sb; |
14121bdc | 1468 | struct cifsTconInfo *tcon; |
ee2fd967 SF |
1469 | FILE_UNIX_BASIC_INFO *info_buf_source = NULL; |
1470 | FILE_UNIX_BASIC_INFO *info_buf_target; | |
8d281efb | 1471 | int xid, rc, tmprc; |
1da177e4 | 1472 | |
639e7a91 JL |
1473 | cifs_sb = CIFS_SB(source_dir->i_sb); |
1474 | tcon = cifs_sb->tcon; | |
1da177e4 | 1475 | |
ee2fd967 SF |
1476 | xid = GetXid(); |
1477 | ||
ee2fd967 SF |
1478 | /* |
1479 | * we already have the rename sem so we do not need to | |
1480 | * grab it again here to protect the path integrity | |
1481 | */ | |
14121bdc | 1482 | fromName = build_path_from_dentry(source_dentry); |
ee2fd967 SF |
1483 | if (fromName == NULL) { |
1484 | rc = -ENOMEM; | |
1485 | goto cifs_rename_exit; | |
1486 | } | |
1487 | ||
14121bdc | 1488 | toName = build_path_from_dentry(target_dentry); |
ee2fd967 | 1489 | if (toName == NULL) { |
1da177e4 LT |
1490 | rc = -ENOMEM; |
1491 | goto cifs_rename_exit; | |
1492 | } | |
1493 | ||
14121bdc JL |
1494 | rc = cifs_do_rename(xid, source_dentry, fromName, |
1495 | target_dentry, toName); | |
ee2fd967 | 1496 | |
14121bdc JL |
1497 | if (rc == -EEXIST && tcon->unix_ext) { |
1498 | /* | |
1499 | * Are src and dst hardlinks of same inode? We can | |
1500 | * only tell with unix extensions enabled | |
1501 | */ | |
1502 | info_buf_source = | |
1503 | kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), | |
1504 | GFP_KERNEL); | |
1505 | if (info_buf_source == NULL) { | |
1506 | rc = -ENOMEM; | |
1507 | goto cifs_rename_exit; | |
1508 | } | |
1509 | ||
1510 | info_buf_target = info_buf_source + 1; | |
8d281efb | 1511 | tmprc = CIFSSMBUnixQPathInfo(xid, tcon, fromName, |
14121bdc | 1512 | info_buf_source, |
639e7a91 JL |
1513 | cifs_sb->local_nls, |
1514 | cifs_sb->mnt_cifs_flags & | |
14121bdc | 1515 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
8d281efb | 1516 | if (tmprc != 0) |
14121bdc | 1517 | goto unlink_target; |
ee2fd967 | 1518 | |
639e7a91 JL |
1519 | tmprc = CIFSSMBUnixQPathInfo(xid, tcon, toName, |
1520 | info_buf_target, | |
1521 | cifs_sb->local_nls, | |
1522 | cifs_sb->mnt_cifs_flags & | |
14121bdc JL |
1523 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1524 | ||
8d281efb | 1525 | if (tmprc == 0 && (info_buf_source->UniqueId == |
ae6884a9 | 1526 | info_buf_target->UniqueId)) { |
14121bdc | 1527 | /* same file, POSIX says that this is a noop */ |
ae6884a9 | 1528 | rc = 0; |
14121bdc | 1529 | goto cifs_rename_exit; |
ae6884a9 | 1530 | } |
14121bdc | 1531 | } /* else ... BB we could add the same check for Windows by |
ee2fd967 | 1532 | checking the UniqueId via FILE_INTERNAL_INFO */ |
14121bdc | 1533 | |
ee2fd967 | 1534 | unlink_target: |
fc6f3943 JL |
1535 | /* Try unlinking the target dentry if it's not negative */ |
1536 | if (target_dentry->d_inode && (rc == -EACCES || rc == -EEXIST)) { | |
8d281efb | 1537 | tmprc = cifs_unlink(target_dir, target_dentry); |
14121bdc JL |
1538 | if (tmprc) |
1539 | goto cifs_rename_exit; | |
1540 | ||
14121bdc JL |
1541 | rc = cifs_do_rename(xid, source_dentry, fromName, |
1542 | target_dentry, toName); | |
1da177e4 LT |
1543 | } |
1544 | ||
1545 | cifs_rename_exit: | |
ee2fd967 | 1546 | kfree(info_buf_source); |
1da177e4 LT |
1547 | kfree(fromName); |
1548 | kfree(toName); | |
1549 | FreeXid(xid); | |
1550 | return rc; | |
1551 | } | |
1552 | ||
df2cf170 JL |
1553 | static bool |
1554 | cifs_inode_needs_reval(struct inode *inode) | |
1da177e4 | 1555 | { |
df2cf170 | 1556 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
1da177e4 | 1557 | |
df2cf170 JL |
1558 | if (cifs_i->clientCanCacheRead) |
1559 | return false; | |
1da177e4 | 1560 | |
df2cf170 JL |
1561 | if (!lookupCacheEnabled) |
1562 | return true; | |
1da177e4 | 1563 | |
df2cf170 JL |
1564 | if (cifs_i->time == 0) |
1565 | return true; | |
1da177e4 | 1566 | |
df2cf170 JL |
1567 | /* FIXME: the actimeo should be tunable */ |
1568 | if (time_after_eq(jiffies, cifs_i->time + HZ)) | |
1569 | return true; | |
1570 | ||
db19272e JL |
1571 | /* hardlinked files w/ noserverino get "special" treatment */ |
1572 | if (!(CIFS_SB(inode->i_sb)->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) && | |
1573 | S_ISREG(inode->i_mode) && inode->i_nlink != 1) | |
1574 | return true; | |
1575 | ||
df2cf170 JL |
1576 | return false; |
1577 | } | |
1578 | ||
1579 | /* check invalid_mapping flag and zap the cache if it's set */ | |
1580 | static void | |
1581 | cifs_invalidate_mapping(struct inode *inode) | |
1582 | { | |
1583 | int rc; | |
1584 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); | |
1585 | ||
1586 | cifs_i->invalid_mapping = false; | |
1587 | ||
1588 | /* write back any cached data */ | |
1589 | if (inode->i_mapping && inode->i_mapping->nrpages != 0) { | |
1590 | rc = filemap_write_and_wait(inode->i_mapping); | |
1591 | if (rc) | |
1592 | cifs_i->write_behind_rc = rc; | |
1593 | } | |
1594 | invalidate_remote_inode(inode); | |
9451a9a5 | 1595 | cifs_fscache_reset_inode_cookie(inode); |
df2cf170 JL |
1596 | } |
1597 | ||
abab095d JL |
1598 | int cifs_revalidate_file(struct file *filp) |
1599 | { | |
1600 | int rc = 0; | |
1601 | struct inode *inode = filp->f_path.dentry->d_inode; | |
1602 | ||
1603 | if (!cifs_inode_needs_reval(inode)) | |
1604 | goto check_inval; | |
1605 | ||
1606 | if (CIFS_SB(inode->i_sb)->tcon->unix_ext) | |
1607 | rc = cifs_get_file_info_unix(filp); | |
1608 | else | |
1609 | rc = cifs_get_file_info(filp); | |
1610 | ||
1611 | check_inval: | |
1612 | if (CIFS_I(inode)->invalid_mapping) | |
1613 | cifs_invalidate_mapping(inode); | |
1614 | ||
1615 | return rc; | |
1616 | } | |
1617 | ||
df2cf170 JL |
1618 | /* revalidate a dentry's inode attributes */ |
1619 | int cifs_revalidate_dentry(struct dentry *dentry) | |
1620 | { | |
1621 | int xid; | |
1622 | int rc = 0; | |
1623 | char *full_path = NULL; | |
1624 | struct inode *inode = dentry->d_inode; | |
1625 | struct super_block *sb = dentry->d_sb; | |
1626 | ||
1627 | if (inode == NULL) | |
1628 | return -ENOENT; | |
1da177e4 LT |
1629 | |
1630 | xid = GetXid(); | |
1631 | ||
df2cf170 JL |
1632 | if (!cifs_inode_needs_reval(inode)) |
1633 | goto check_inval; | |
1da177e4 LT |
1634 | |
1635 | /* can not safely grab the rename sem here if rename calls revalidate | |
1636 | since that would deadlock */ | |
df2cf170 | 1637 | full_path = build_path_from_dentry(dentry); |
1da177e4 | 1638 | if (full_path == NULL) { |
0f3bc09e | 1639 | rc = -ENOMEM; |
df2cf170 | 1640 | goto check_inval; |
1da177e4 LT |
1641 | } |
1642 | ||
f19159dc | 1643 | cFYI(1, "Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld " |
df2cf170 | 1644 | "jiffies %ld", full_path, inode, inode->i_count.counter, |
f19159dc | 1645 | dentry, dentry->d_time, jiffies); |
1da177e4 | 1646 | |
df2cf170 JL |
1647 | if (CIFS_SB(sb)->tcon->unix_ext) |
1648 | rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid); | |
1649 | else | |
1650 | rc = cifs_get_inode_info(&inode, full_path, NULL, sb, | |
1651 | xid, NULL); | |
1da177e4 | 1652 | |
df2cf170 JL |
1653 | check_inval: |
1654 | if (CIFS_I(inode)->invalid_mapping) | |
1655 | cifs_invalidate_mapping(inode); | |
50c2f753 | 1656 | |
1da177e4 LT |
1657 | kfree(full_path); |
1658 | FreeXid(xid); | |
1659 | return rc; | |
1660 | } | |
1661 | ||
1662 | int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
1663 | struct kstat *stat) | |
1664 | { | |
df2cf170 | 1665 | int err = cifs_revalidate_dentry(dentry); |
5fe14c85 | 1666 | if (!err) { |
1da177e4 | 1667 | generic_fillattr(dentry->d_inode, stat); |
5fe14c85 | 1668 | stat->blksize = CIFS_MAX_MSGSIZE; |
cc0bad75 | 1669 | stat->ino = CIFS_I(dentry->d_inode)->uniqueid; |
5fe14c85 | 1670 | } |
1da177e4 LT |
1671 | return err; |
1672 | } | |
1673 | ||
1674 | static int cifs_truncate_page(struct address_space *mapping, loff_t from) | |
1675 | { | |
1676 | pgoff_t index = from >> PAGE_CACHE_SHIFT; | |
1677 | unsigned offset = from & (PAGE_CACHE_SIZE - 1); | |
1678 | struct page *page; | |
1da177e4 LT |
1679 | int rc = 0; |
1680 | ||
1681 | page = grab_cache_page(mapping, index); | |
1682 | if (!page) | |
1683 | return -ENOMEM; | |
1684 | ||
eebd2aa3 | 1685 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); |
1da177e4 LT |
1686 | unlock_page(page); |
1687 | page_cache_release(page); | |
1688 | return rc; | |
1689 | } | |
1690 | ||
1b947463 | 1691 | static void cifs_setsize(struct inode *inode, loff_t offset) |
3677db10 | 1692 | { |
c08d3b0e | 1693 | loff_t oldsize; |
3677db10 | 1694 | |
ba6a46a0 | 1695 | spin_lock(&inode->i_lock); |
c08d3b0e | 1696 | oldsize = inode->i_size; |
3677db10 | 1697 | i_size_write(inode, offset); |
ba6a46a0 | 1698 | spin_unlock(&inode->i_lock); |
1b947463 | 1699 | |
c08d3b0e | 1700 | truncate_pagecache(inode, oldsize, offset); |
3677db10 SF |
1701 | } |
1702 | ||
8efdbde6 JL |
1703 | static int |
1704 | cifs_set_file_size(struct inode *inode, struct iattr *attrs, | |
1705 | int xid, char *full_path) | |
1706 | { | |
1707 | int rc; | |
1708 | struct cifsFileInfo *open_file; | |
1709 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); | |
1710 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
1711 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
1712 | ||
1713 | /* | |
1714 | * To avoid spurious oplock breaks from server, in the case of | |
1715 | * inodes that we already have open, avoid doing path based | |
1716 | * setting of file size if we can do it by handle. | |
1717 | * This keeps our caching token (oplock) and avoids timeouts | |
1718 | * when the local oplock break takes longer to flush | |
1719 | * writebehind data than the SMB timeout for the SetPathInfo | |
1720 | * request would allow | |
1721 | */ | |
1722 | open_file = find_writable_file(cifsInode); | |
1723 | if (open_file) { | |
1724 | __u16 nfid = open_file->netfid; | |
1725 | __u32 npid = open_file->pid; | |
1726 | rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size, nfid, | |
1727 | npid, false); | |
6ab409b5 | 1728 | cifsFileInfo_put(open_file); |
b6b38f70 | 1729 | cFYI(1, "SetFSize for attrs rc = %d", rc); |
8efdbde6 JL |
1730 | if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { |
1731 | unsigned int bytes_written; | |
1732 | rc = CIFSSMBWrite(xid, pTcon, nfid, 0, attrs->ia_size, | |
1733 | &bytes_written, NULL, NULL, 1); | |
b6b38f70 | 1734 | cFYI(1, "Wrt seteof rc %d", rc); |
8efdbde6 JL |
1735 | } |
1736 | } else | |
1737 | rc = -EINVAL; | |
1738 | ||
1739 | if (rc != 0) { | |
1740 | /* Set file size by pathname rather than by handle | |
1741 | either because no valid, writeable file handle for | |
1742 | it was found or because there was an error setting | |
1743 | it by handle */ | |
1744 | rc = CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, | |
1745 | false, cifs_sb->local_nls, | |
1746 | cifs_sb->mnt_cifs_flags & | |
1747 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
b6b38f70 | 1748 | cFYI(1, "SetEOF by path (setattrs) rc = %d", rc); |
8efdbde6 JL |
1749 | if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { |
1750 | __u16 netfid; | |
1751 | int oplock = 0; | |
1752 | ||
1753 | rc = SMBLegacyOpen(xid, pTcon, full_path, | |
1754 | FILE_OPEN, GENERIC_WRITE, | |
1755 | CREATE_NOT_DIR, &netfid, &oplock, NULL, | |
1756 | cifs_sb->local_nls, | |
1757 | cifs_sb->mnt_cifs_flags & | |
1758 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1759 | if (rc == 0) { | |
1760 | unsigned int bytes_written; | |
1761 | rc = CIFSSMBWrite(xid, pTcon, netfid, 0, | |
1762 | attrs->ia_size, | |
1763 | &bytes_written, NULL, | |
1764 | NULL, 1); | |
b6b38f70 | 1765 | cFYI(1, "wrt seteof rc %d", rc); |
8efdbde6 JL |
1766 | CIFSSMBClose(xid, pTcon, netfid); |
1767 | } | |
1768 | } | |
1769 | } | |
1770 | ||
1771 | if (rc == 0) { | |
fbec9ab9 | 1772 | cifsInode->server_eof = attrs->ia_size; |
1b947463 | 1773 | cifs_setsize(inode, attrs->ia_size); |
8efdbde6 JL |
1774 | cifs_truncate_page(inode->i_mapping, inode->i_size); |
1775 | } | |
1776 | ||
1777 | return rc; | |
1778 | } | |
1779 | ||
3fe5c1dd JL |
1780 | static int |
1781 | cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs) | |
1782 | { | |
1783 | int rc; | |
1784 | int xid; | |
1785 | char *full_path = NULL; | |
1786 | struct inode *inode = direntry->d_inode; | |
1787 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); | |
1788 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
1789 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
1790 | struct cifs_unix_set_info_args *args = NULL; | |
3bbeeb3c | 1791 | struct cifsFileInfo *open_file; |
3fe5c1dd | 1792 | |
b6b38f70 JP |
1793 | cFYI(1, "setattr_unix on file %s attrs->ia_valid=0x%x", |
1794 | direntry->d_name.name, attrs->ia_valid); | |
3fe5c1dd JL |
1795 | |
1796 | xid = GetXid(); | |
1797 | ||
db78b877 CH |
1798 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) |
1799 | attrs->ia_valid |= ATTR_FORCE; | |
1800 | ||
1801 | rc = inode_change_ok(inode, attrs); | |
1802 | if (rc < 0) | |
1803 | goto out; | |
3fe5c1dd JL |
1804 | |
1805 | full_path = build_path_from_dentry(direntry); | |
1806 | if (full_path == NULL) { | |
1807 | rc = -ENOMEM; | |
1808 | goto out; | |
1809 | } | |
1810 | ||
0f4d634c JL |
1811 | /* |
1812 | * Attempt to flush data before changing attributes. We need to do | |
1813 | * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the | |
1814 | * ownership or mode then we may also need to do this. Here, we take | |
1815 | * the safe way out and just do the flush on all setattr requests. If | |
1816 | * the flush returns error, store it to report later and continue. | |
1817 | * | |
1818 | * BB: This should be smarter. Why bother flushing pages that | |
1819 | * will be truncated anyway? Also, should we error out here if | |
1820 | * the flush returns error? | |
1821 | */ | |
1822 | rc = filemap_write_and_wait(inode->i_mapping); | |
1823 | if (rc != 0) { | |
1824 | cifsInode->write_behind_rc = rc; | |
1825 | rc = 0; | |
3fe5c1dd JL |
1826 | } |
1827 | ||
1828 | if (attrs->ia_valid & ATTR_SIZE) { | |
1829 | rc = cifs_set_file_size(inode, attrs, xid, full_path); | |
1830 | if (rc != 0) | |
1831 | goto out; | |
1832 | } | |
1833 | ||
1834 | /* skip mode change if it's just for clearing setuid/setgid */ | |
1835 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) | |
1836 | attrs->ia_valid &= ~ATTR_MODE; | |
1837 | ||
1838 | args = kmalloc(sizeof(*args), GFP_KERNEL); | |
1839 | if (args == NULL) { | |
1840 | rc = -ENOMEM; | |
1841 | goto out; | |
1842 | } | |
1843 | ||
1844 | /* set up the struct */ | |
1845 | if (attrs->ia_valid & ATTR_MODE) | |
1846 | args->mode = attrs->ia_mode; | |
1847 | else | |
1848 | args->mode = NO_CHANGE_64; | |
1849 | ||
1850 | if (attrs->ia_valid & ATTR_UID) | |
1851 | args->uid = attrs->ia_uid; | |
1852 | else | |
1853 | args->uid = NO_CHANGE_64; | |
1854 | ||
1855 | if (attrs->ia_valid & ATTR_GID) | |
1856 | args->gid = attrs->ia_gid; | |
1857 | else | |
1858 | args->gid = NO_CHANGE_64; | |
1859 | ||
1860 | if (attrs->ia_valid & ATTR_ATIME) | |
1861 | args->atime = cifs_UnixTimeToNT(attrs->ia_atime); | |
1862 | else | |
1863 | args->atime = NO_CHANGE_64; | |
1864 | ||
1865 | if (attrs->ia_valid & ATTR_MTIME) | |
1866 | args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime); | |
1867 | else | |
1868 | args->mtime = NO_CHANGE_64; | |
1869 | ||
1870 | if (attrs->ia_valid & ATTR_CTIME) | |
1871 | args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime); | |
1872 | else | |
1873 | args->ctime = NO_CHANGE_64; | |
1874 | ||
1875 | args->device = 0; | |
3bbeeb3c JL |
1876 | open_file = find_writable_file(cifsInode); |
1877 | if (open_file) { | |
1878 | u16 nfid = open_file->netfid; | |
1879 | u32 npid = open_file->pid; | |
1880 | rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid); | |
6ab409b5 | 1881 | cifsFileInfo_put(open_file); |
3bbeeb3c JL |
1882 | } else { |
1883 | rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args, | |
01ea95e3 JL |
1884 | cifs_sb->local_nls, |
1885 | cifs_sb->mnt_cifs_flags & | |
1886 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
3bbeeb3c | 1887 | } |
3fe5c1dd | 1888 | |
1025774c CH |
1889 | if (rc) |
1890 | goto out; | |
ccd4bb1b | 1891 | |
1025774c | 1892 | if ((attrs->ia_valid & ATTR_SIZE) && |
1b947463 CH |
1893 | attrs->ia_size != i_size_read(inode)) |
1894 | truncate_setsize(inode, attrs->ia_size); | |
1025774c CH |
1895 | |
1896 | setattr_copy(inode, attrs); | |
1897 | mark_inode_dirty(inode); | |
1898 | ||
1899 | /* force revalidate when any of these times are set since some | |
1900 | of the fs types (eg ext3, fat) do not have fine enough | |
1901 | time granularity to match protocol, and we do not have a | |
1902 | a way (yet) to query the server fs's time granularity (and | |
1903 | whether it rounds times down). | |
1904 | */ | |
1905 | if (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME)) | |
1906 | cifsInode->time = 0; | |
3fe5c1dd JL |
1907 | out: |
1908 | kfree(args); | |
1909 | kfree(full_path); | |
1910 | FreeXid(xid); | |
1911 | return rc; | |
1912 | } | |
1913 | ||
0510eeb7 JL |
1914 | static int |
1915 | cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs) | |
1da177e4 LT |
1916 | { |
1917 | int xid; | |
3fe5c1dd JL |
1918 | struct inode *inode = direntry->d_inode; |
1919 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
3fe5c1dd | 1920 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
1da177e4 LT |
1921 | char *full_path = NULL; |
1922 | int rc = -EACCES; | |
feb3e20c | 1923 | __u32 dosattr = 0; |
4e1e7fb9 | 1924 | __u64 mode = NO_CHANGE_64; |
3fe5c1dd | 1925 | |
1da177e4 LT |
1926 | xid = GetXid(); |
1927 | ||
b6b38f70 JP |
1928 | cFYI(1, "setattr on file %s attrs->iavalid 0x%x", |
1929 | direntry->d_name.name, attrs->ia_valid); | |
6473a559 | 1930 | |
db78b877 CH |
1931 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) |
1932 | attrs->ia_valid |= ATTR_FORCE; | |
1933 | ||
1934 | rc = inode_change_ok(inode, attrs); | |
1935 | if (rc < 0) { | |
1936 | FreeXid(xid); | |
1937 | return rc; | |
6473a559 | 1938 | } |
50c2f753 | 1939 | |
7f57356b | 1940 | full_path = build_path_from_dentry(direntry); |
1da177e4 | 1941 | if (full_path == NULL) { |
0f3bc09e | 1942 | rc = -ENOMEM; |
1da177e4 | 1943 | FreeXid(xid); |
0f3bc09e | 1944 | return rc; |
1da177e4 | 1945 | } |
1da177e4 | 1946 | |
0f4d634c JL |
1947 | /* |
1948 | * Attempt to flush data before changing attributes. We need to do | |
1949 | * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the | |
1950 | * ownership or mode then we may also need to do this. Here, we take | |
1951 | * the safe way out and just do the flush on all setattr requests. If | |
1952 | * the flush returns error, store it to report later and continue. | |
1953 | * | |
1954 | * BB: This should be smarter. Why bother flushing pages that | |
1955 | * will be truncated anyway? Also, should we error out here if | |
1956 | * the flush returns error? | |
1957 | */ | |
1958 | rc = filemap_write_and_wait(inode->i_mapping); | |
1959 | if (rc != 0) { | |
1960 | cifsInode->write_behind_rc = rc; | |
1961 | rc = 0; | |
50531444 | 1962 | } |
cea21805 | 1963 | |
50531444 | 1964 | if (attrs->ia_valid & ATTR_SIZE) { |
8efdbde6 JL |
1965 | rc = cifs_set_file_size(inode, attrs, xid, full_path); |
1966 | if (rc != 0) | |
e30dcf3a | 1967 | goto cifs_setattr_exit; |
1da177e4 | 1968 | } |
4ca691a8 JL |
1969 | |
1970 | /* | |
1971 | * Without unix extensions we can't send ownership changes to the | |
1972 | * server, so silently ignore them. This is consistent with how | |
1973 | * local DOS/Windows filesystems behave (VFAT, NTFS, etc). With | |
1974 | * CIFSACL support + proper Windows to Unix idmapping, we may be | |
1975 | * able to support this in the future. | |
1976 | */ | |
3fe5c1dd | 1977 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) |
4ca691a8 | 1978 | attrs->ia_valid &= ~(ATTR_UID | ATTR_GID); |
1da177e4 | 1979 | |
d32c4f26 JL |
1980 | /* skip mode change if it's just for clearing setuid/setgid */ |
1981 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) | |
1982 | attrs->ia_valid &= ~ATTR_MODE; | |
1983 | ||
1da177e4 | 1984 | if (attrs->ia_valid & ATTR_MODE) { |
b6b38f70 | 1985 | cFYI(1, "Mode changed to 0%o", attrs->ia_mode); |
1da177e4 | 1986 | mode = attrs->ia_mode; |
1da177e4 LT |
1987 | } |
1988 | ||
3fe5c1dd | 1989 | if (attrs->ia_valid & ATTR_MODE) { |
cdbce9c8 | 1990 | rc = 0; |
97837582 SF |
1991 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
1992 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) | |
02eadeff | 1993 | rc = mode_to_acl(inode, full_path, mode); |
5132861a | 1994 | else |
97837582 | 1995 | #endif |
5132861a JL |
1996 | if (((mode & S_IWUGO) == 0) && |
1997 | (cifsInode->cifsAttrs & ATTR_READONLY) == 0) { | |
feb3e20c JL |
1998 | |
1999 | dosattr = cifsInode->cifsAttrs | ATTR_READONLY; | |
2000 | ||
5132861a JL |
2001 | /* fix up mode if we're not using dynperm */ |
2002 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0) | |
2003 | attrs->ia_mode = inode->i_mode & ~S_IWUGO; | |
2004 | } else if ((mode & S_IWUGO) && | |
2005 | (cifsInode->cifsAttrs & ATTR_READONLY)) { | |
feb3e20c JL |
2006 | |
2007 | dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY; | |
2008 | /* Attributes of 0 are ignored */ | |
2009 | if (dosattr == 0) | |
2010 | dosattr |= ATTR_NORMAL; | |
5132861a JL |
2011 | |
2012 | /* reset local inode permissions to normal */ | |
2013 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { | |
2014 | attrs->ia_mode &= ~(S_IALLUGO); | |
2015 | if (S_ISDIR(inode->i_mode)) | |
2016 | attrs->ia_mode |= | |
2017 | cifs_sb->mnt_dir_mode; | |
2018 | else | |
2019 | attrs->ia_mode |= | |
2020 | cifs_sb->mnt_file_mode; | |
2021 | } | |
2022 | } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { | |
2023 | /* ignore mode change - ATTR_READONLY hasn't changed */ | |
2024 | attrs->ia_valid &= ~ATTR_MODE; | |
1da177e4 | 2025 | } |
1da177e4 LT |
2026 | } |
2027 | ||
feb3e20c JL |
2028 | if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) || |
2029 | ((attrs->ia_valid & ATTR_MODE) && dosattr)) { | |
2030 | rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); | |
2031 | /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */ | |
1da177e4 | 2032 | |
e30dcf3a SF |
2033 | /* Even if error on time set, no sense failing the call if |
2034 | the server would set the time to a reasonable value anyway, | |
2035 | and this check ensures that we are not being called from | |
2036 | sys_utimes in which case we ought to fail the call back to | |
2037 | the user when the server rejects the call */ | |
fb8c4b14 | 2038 | if ((rc) && (attrs->ia_valid & |
feb3e20c | 2039 | (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE))) |
e30dcf3a | 2040 | rc = 0; |
1da177e4 LT |
2041 | } |
2042 | ||
2043 | /* do not need local check to inode_check_ok since the server does | |
2044 | that */ | |
1025774c CH |
2045 | if (rc) |
2046 | goto cifs_setattr_exit; | |
2047 | ||
2048 | if ((attrs->ia_valid & ATTR_SIZE) && | |
1b947463 CH |
2049 | attrs->ia_size != i_size_read(inode)) |
2050 | truncate_setsize(inode, attrs->ia_size); | |
1025774c CH |
2051 | |
2052 | setattr_copy(inode, attrs); | |
2053 | mark_inode_dirty(inode); | |
2054 | return 0; | |
2055 | ||
e30dcf3a | 2056 | cifs_setattr_exit: |
1da177e4 LT |
2057 | kfree(full_path); |
2058 | FreeXid(xid); | |
2059 | return rc; | |
2060 | } | |
2061 | ||
0510eeb7 JL |
2062 | int |
2063 | cifs_setattr(struct dentry *direntry, struct iattr *attrs) | |
2064 | { | |
2065 | struct inode *inode = direntry->d_inode; | |
2066 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
2067 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
2068 | ||
2069 | if (pTcon->unix_ext) | |
2070 | return cifs_setattr_unix(direntry, attrs); | |
2071 | ||
2072 | return cifs_setattr_nounix(direntry, attrs); | |
2073 | ||
2074 | /* BB: add cifs_setattr_legacy for really old servers */ | |
2075 | } | |
2076 | ||
99ee4dbd | 2077 | #if 0 |
1da177e4 LT |
2078 | void cifs_delete_inode(struct inode *inode) |
2079 | { | |
b6b38f70 | 2080 | cFYI(1, "In cifs_delete_inode, inode = 0x%p", inode); |
1da177e4 LT |
2081 | /* may have to add back in if and when safe distributed caching of |
2082 | directories added e.g. via FindNotify */ | |
2083 | } | |
99ee4dbd | 2084 | #endif |