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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 */ | |
a6e8a845 | 55 | if (cifs_sb_tcon(cifs_sb)->ses->server->maxBuf < |
70eff55d CH |
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); | |
c21dfb69 | 291 | struct cifsFileInfo *cfile = filp->private_data; |
ba00ba64 | 292 | struct cifsTconInfo *tcon = cfile->tcon; |
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 | |
a6e8a845 JL |
318 | tcon = cifs_sb_tcon(cifs_sb); |
319 | ||
b6b38f70 | 320 | cFYI(1, "Getting info on %s", full_path); |
7962670e | 321 | |
1da177e4 | 322 | /* could have done a find first instead but this returns more info */ |
cc0bad75 | 323 | rc = CIFSSMBUnixQPathInfo(xid, tcon, full_path, &find_data, |
737b758c SF |
324 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
325 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
e911d0cc | 326 | |
cc0bad75 JL |
327 | if (!rc) { |
328 | cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb); | |
329 | } else if (rc == -EREMOTE) { | |
330 | cifs_create_dfs_fattr(&fattr, sb); | |
331 | rc = 0; | |
332 | } else { | |
333 | return rc; | |
334 | } | |
1da177e4 | 335 | |
1b12b9c1 SM |
336 | /* check for Minshall+French symlinks */ |
337 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) { | |
338 | int tmprc = CIFSCheckMFSymlink(&fattr, full_path, cifs_sb, xid); | |
339 | if (tmprc) | |
340 | cFYI(1, "CIFSCheckMFSymlink: %d", tmprc); | |
341 | } | |
342 | ||
0e4bbde9 | 343 | if (*pinode == NULL) { |
cc0bad75 | 344 | /* get new inode */ |
4065c802 | 345 | cifs_fill_uniqueid(sb, &fattr); |
cc0bad75 JL |
346 | *pinode = cifs_iget(sb, &fattr); |
347 | if (!*pinode) | |
0e4bbde9 | 348 | rc = -ENOMEM; |
cc0bad75 JL |
349 | } else { |
350 | /* we already have inode, update it */ | |
351 | cifs_fattr_to_inode(*pinode, &fattr); | |
0e4bbde9 | 352 | } |
1da177e4 | 353 | |
1da177e4 LT |
354 | return rc; |
355 | } | |
356 | ||
0b8f18e3 JL |
357 | static int |
358 | cifs_sfu_type(struct cifs_fattr *fattr, const unsigned char *path, | |
359 | struct cifs_sb_info *cifs_sb, int xid) | |
d6e2f2a4 SF |
360 | { |
361 | int rc; | |
4b18f2a9 | 362 | int oplock = 0; |
d6e2f2a4 | 363 | __u16 netfid; |
a6e8a845 | 364 | struct cifsTconInfo *pTcon = cifs_sb_tcon(cifs_sb); |
86c96b4b | 365 | char buf[24]; |
d6e2f2a4 | 366 | unsigned int bytes_read; |
fb8c4b14 | 367 | char *pbuf; |
d6e2f2a4 SF |
368 | |
369 | pbuf = buf; | |
370 | ||
0b8f18e3 JL |
371 | fattr->cf_mode &= ~S_IFMT; |
372 | ||
373 | if (fattr->cf_eof == 0) { | |
374 | fattr->cf_mode |= S_IFIFO; | |
375 | fattr->cf_dtype = DT_FIFO; | |
d6e2f2a4 | 376 | return 0; |
0b8f18e3 JL |
377 | } else if (fattr->cf_eof < 8) { |
378 | fattr->cf_mode |= S_IFREG; | |
379 | fattr->cf_dtype = DT_REG; | |
d6e2f2a4 SF |
380 | return -EINVAL; /* EOPNOTSUPP? */ |
381 | } | |
50c2f753 | 382 | |
d6e2f2a4 SF |
383 | rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ, |
384 | CREATE_NOT_DIR, &netfid, &oplock, NULL, | |
385 | cifs_sb->local_nls, | |
386 | cifs_sb->mnt_cifs_flags & | |
387 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
fb8c4b14 | 388 | if (rc == 0) { |
ec637e3f | 389 | int buf_type = CIFS_NO_BUFFER; |
d6e2f2a4 | 390 | /* Read header */ |
0b8f18e3 | 391 | rc = CIFSSMBRead(xid, pTcon, netfid, |
86c96b4b | 392 | 24 /* length */, 0 /* offset */, |
ec637e3f | 393 | &bytes_read, &pbuf, &buf_type); |
4523cc30 SF |
394 | if ((rc == 0) && (bytes_read >= 8)) { |
395 | if (memcmp("IntxBLK", pbuf, 8) == 0) { | |
b6b38f70 | 396 | cFYI(1, "Block device"); |
0b8f18e3 JL |
397 | fattr->cf_mode |= S_IFBLK; |
398 | fattr->cf_dtype = DT_BLK; | |
4523cc30 | 399 | if (bytes_read == 24) { |
86c96b4b SF |
400 | /* we have enough to decode dev num */ |
401 | __u64 mjr; /* major */ | |
402 | __u64 mnr; /* minor */ | |
403 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); | |
404 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); | |
0b8f18e3 | 405 | fattr->cf_rdev = MKDEV(mjr, mnr); |
86c96b4b | 406 | } |
4523cc30 | 407 | } else if (memcmp("IntxCHR", pbuf, 8) == 0) { |
b6b38f70 | 408 | cFYI(1, "Char device"); |
0b8f18e3 JL |
409 | fattr->cf_mode |= S_IFCHR; |
410 | fattr->cf_dtype = DT_CHR; | |
4523cc30 | 411 | if (bytes_read == 24) { |
86c96b4b SF |
412 | /* we have enough to decode dev num */ |
413 | __u64 mjr; /* major */ | |
414 | __u64 mnr; /* minor */ | |
415 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); | |
416 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); | |
0b8f18e3 | 417 | fattr->cf_rdev = MKDEV(mjr, mnr); |
fb8c4b14 | 418 | } |
4523cc30 | 419 | } else if (memcmp("IntxLNK", pbuf, 7) == 0) { |
b6b38f70 | 420 | cFYI(1, "Symlink"); |
0b8f18e3 JL |
421 | fattr->cf_mode |= S_IFLNK; |
422 | fattr->cf_dtype = DT_LNK; | |
86c96b4b | 423 | } else { |
0b8f18e3 JL |
424 | fattr->cf_mode |= S_IFREG; /* file? */ |
425 | fattr->cf_dtype = DT_REG; | |
fb8c4b14 | 426 | rc = -EOPNOTSUPP; |
86c96b4b | 427 | } |
3020a1f5 | 428 | } else { |
0b8f18e3 JL |
429 | fattr->cf_mode |= S_IFREG; /* then it is a file */ |
430 | fattr->cf_dtype = DT_REG; | |
fb8c4b14 SF |
431 | rc = -EOPNOTSUPP; /* or some unknown SFU type */ |
432 | } | |
d6e2f2a4 | 433 | CIFSSMBClose(xid, pTcon, netfid); |
d6e2f2a4 SF |
434 | } |
435 | return rc; | |
d6e2f2a4 SF |
436 | } |
437 | ||
9e294f1c SF |
438 | #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */ |
439 | ||
0b8f18e3 JL |
440 | /* |
441 | * Fetch mode bits as provided by SFU. | |
442 | * | |
443 | * FIXME: Doesn't this clobber the type bit we got from cifs_sfu_type ? | |
444 | */ | |
445 | static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path, | |
446 | struct cifs_sb_info *cifs_sb, int xid) | |
9e294f1c | 447 | { |
3020a1f5 | 448 | #ifdef CONFIG_CIFS_XATTR |
9e294f1c SF |
449 | ssize_t rc; |
450 | char ea_value[4]; | |
451 | __u32 mode; | |
452 | ||
a6e8a845 | 453 | rc = CIFSSMBQAllEAs(xid, cifs_sb_tcon(cifs_sb), path, "SETFILEBITS", |
0b8f18e3 JL |
454 | ea_value, 4 /* size of buf */, cifs_sb->local_nls, |
455 | cifs_sb->mnt_cifs_flags & | |
456 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
4523cc30 | 457 | if (rc < 0) |
9e294f1c SF |
458 | return (int)rc; |
459 | else if (rc > 3) { | |
460 | mode = le32_to_cpu(*((__le32 *)ea_value)); | |
0b8f18e3 | 461 | fattr->cf_mode &= ~SFBITS_MASK; |
b6b38f70 JP |
462 | cFYI(1, "special bits 0%o org mode 0%o", mode, |
463 | fattr->cf_mode); | |
0b8f18e3 | 464 | fattr->cf_mode = (mode & SFBITS_MASK) | fattr->cf_mode; |
b6b38f70 | 465 | cFYI(1, "special mode bits 0%o", mode); |
9e294f1c | 466 | } |
0b8f18e3 JL |
467 | |
468 | return 0; | |
3020a1f5 SF |
469 | #else |
470 | return -EOPNOTSUPP; | |
471 | #endif | |
9e294f1c SF |
472 | } |
473 | ||
0b8f18e3 | 474 | /* Fill a cifs_fattr struct with info from FILE_ALL_INFO */ |
f1230c97 | 475 | static void |
0b8f18e3 JL |
476 | cifs_all_info_to_fattr(struct cifs_fattr *fattr, FILE_ALL_INFO *info, |
477 | struct cifs_sb_info *cifs_sb, bool adjust_tz) | |
b9a3260f | 478 | { |
0b8f18e3 JL |
479 | memset(fattr, 0, sizeof(*fattr)); |
480 | fattr->cf_cifsattrs = le32_to_cpu(info->Attributes); | |
481 | if (info->DeletePending) | |
482 | fattr->cf_flags |= CIFS_FATTR_DELETE_PENDING; | |
483 | ||
484 | if (info->LastAccessTime) | |
485 | fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); | |
486 | else | |
487 | fattr->cf_atime = CURRENT_TIME; | |
488 | ||
489 | fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime); | |
490 | fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime); | |
491 | ||
492 | if (adjust_tz) { | |
a6e8a845 JL |
493 | fattr->cf_ctime.tv_sec += cifs_sb_tcon(cifs_sb)->ses->server->timeAdj; |
494 | fattr->cf_mtime.tv_sec += cifs_sb_tcon(cifs_sb)->ses->server->timeAdj; | |
0b8f18e3 JL |
495 | } |
496 | ||
497 | fattr->cf_eof = le64_to_cpu(info->EndOfFile); | |
498 | fattr->cf_bytes = le64_to_cpu(info->AllocationSize); | |
499 | ||
500 | if (fattr->cf_cifsattrs & ATTR_DIRECTORY) { | |
501 | fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode; | |
502 | fattr->cf_dtype = DT_DIR; | |
503 | } else { | |
504 | fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode; | |
505 | fattr->cf_dtype = DT_REG; | |
0b8f18e3 | 506 | |
d0c280d2 JL |
507 | /* clear write bits if ATTR_READONLY is set */ |
508 | if (fattr->cf_cifsattrs & ATTR_READONLY) | |
509 | fattr->cf_mode &= ~(S_IWUGO); | |
510 | } | |
0b8f18e3 JL |
511 | |
512 | fattr->cf_nlink = le32_to_cpu(info->NumberOfLinks); | |
513 | ||
514 | fattr->cf_uid = cifs_sb->mnt_uid; | |
515 | fattr->cf_gid = cifs_sb->mnt_gid; | |
b9a3260f SF |
516 | } |
517 | ||
abab095d JL |
518 | int cifs_get_file_info(struct file *filp) |
519 | { | |
520 | int rc; | |
521 | int xid; | |
522 | FILE_ALL_INFO find_data; | |
523 | struct cifs_fattr fattr; | |
524 | struct inode *inode = filp->f_path.dentry->d_inode; | |
525 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
c21dfb69 | 526 | struct cifsFileInfo *cfile = filp->private_data; |
ba00ba64 | 527 | struct cifsTconInfo *tcon = cfile->tcon; |
abab095d JL |
528 | |
529 | xid = GetXid(); | |
530 | rc = CIFSSMBQFileInfo(xid, tcon, cfile->netfid, &find_data); | |
531 | if (rc == -EOPNOTSUPP || rc == -EINVAL) { | |
532 | /* | |
533 | * FIXME: legacy server -- fall back to path-based call? | |
ff215713 SF |
534 | * for now, just skip revalidating and mark inode for |
535 | * immediate reval. | |
536 | */ | |
abab095d JL |
537 | rc = 0; |
538 | CIFS_I(inode)->time = 0; | |
539 | goto cgfi_exit; | |
540 | } else if (rc == -EREMOTE) { | |
541 | cifs_create_dfs_fattr(&fattr, inode->i_sb); | |
542 | rc = 0; | |
543 | } else if (rc) | |
544 | goto cgfi_exit; | |
545 | ||
546 | /* | |
547 | * don't bother with SFU junk here -- just mark inode as needing | |
548 | * revalidation. | |
549 | */ | |
550 | cifs_all_info_to_fattr(&fattr, &find_data, cifs_sb, false); | |
551 | fattr.cf_uniqueid = CIFS_I(inode)->uniqueid; | |
552 | fattr.cf_flags |= CIFS_FATTR_NEED_REVAL; | |
553 | cifs_fattr_to_inode(inode, &fattr); | |
554 | cgfi_exit: | |
555 | FreeXid(xid); | |
556 | return rc; | |
557 | } | |
558 | ||
1da177e4 | 559 | int cifs_get_inode_info(struct inode **pinode, |
646dd539 | 560 | const unsigned char *full_path, FILE_ALL_INFO *pfindData, |
8b1327f6 | 561 | struct super_block *sb, int xid, const __u16 *pfid) |
1da177e4 | 562 | { |
0b8f18e3 | 563 | int rc = 0, tmprc; |
1da177e4 | 564 | struct cifsTconInfo *pTcon; |
1da177e4 | 565 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
1da177e4 | 566 | char *buf = NULL; |
5ade9dea | 567 | bool adjustTZ = false; |
0b8f18e3 | 568 | struct cifs_fattr fattr; |
1da177e4 | 569 | |
a6e8a845 | 570 | pTcon = cifs_sb_tcon(cifs_sb); |
b6b38f70 | 571 | cFYI(1, "Getting info on %s", full_path); |
1da177e4 | 572 | |
d0d2f2df SF |
573 | if ((pfindData == NULL) && (*pinode != NULL)) { |
574 | if (CIFS_I(*pinode)->clientCanCacheRead) { | |
b6b38f70 | 575 | cFYI(1, "No need to revalidate cached inode sizes"); |
1da177e4 LT |
576 | return rc; |
577 | } | |
578 | } | |
579 | ||
580 | /* if file info not passed in then get it from server */ | |
d0d2f2df | 581 | if (pfindData == NULL) { |
1da177e4 | 582 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
d0d2f2df | 583 | if (buf == NULL) |
1da177e4 LT |
584 | return -ENOMEM; |
585 | pfindData = (FILE_ALL_INFO *)buf; | |
7962670e | 586 | |
1da177e4 | 587 | /* could do find first instead but this returns more info */ |
7962670e | 588 | rc = CIFSSMBQPathInfo(xid, pTcon, full_path, pfindData, |
acf1a1b1 | 589 | 0 /* not legacy */, |
6b8edfe0 | 590 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
737b758c | 591 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
6b8edfe0 SF |
592 | /* BB optimize code so we do not make the above call |
593 | when server claims no NT SMB support and the above call | |
594 | failed at least once - set flag in tcon or mount */ | |
4523cc30 | 595 | if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) { |
7962670e | 596 | rc = SMBQueryInformation(xid, pTcon, full_path, |
fb8c4b14 | 597 | pfindData, cifs_sb->local_nls, |
6b8edfe0 SF |
598 | cifs_sb->mnt_cifs_flags & |
599 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
4b18f2a9 | 600 | adjustTZ = true; |
6b8edfe0 | 601 | } |
1da177e4 | 602 | } |
0b8f18e3 JL |
603 | |
604 | if (!rc) { | |
605 | cifs_all_info_to_fattr(&fattr, (FILE_ALL_INFO *) pfindData, | |
606 | cifs_sb, adjustTZ); | |
607 | } else if (rc == -EREMOTE) { | |
608 | cifs_create_dfs_fattr(&fattr, sb); | |
b9a3260f | 609 | rc = 0; |
0b8f18e3 | 610 | } else { |
7962670e | 611 | goto cgii_exit; |
0b8f18e3 | 612 | } |
1da177e4 | 613 | |
0b8f18e3 JL |
614 | /* |
615 | * If an inode wasn't passed in, then get the inode number | |
616 | * | |
617 | * Is an i_ino of zero legal? Can we use that to check if the server | |
618 | * supports returning inode numbers? Are there other sanity checks we | |
619 | * can use to ensure that the server is really filling in that field? | |
620 | * | |
621 | * We can not use the IndexNumber field by default from Windows or | |
622 | * Samba (in ALL_INFO buf) but we can request it explicitly. The SNIA | |
623 | * CIFS spec claims that this value is unique within the scope of a | |
624 | * share, and the windows docs hint that it's actually unique | |
625 | * per-machine. | |
626 | * | |
627 | * There may be higher info levels that work but are there Windows | |
628 | * server or network appliances for which IndexNumber field is not | |
629 | * guaranteed unique? | |
630 | */ | |
b9a3260f | 631 | if (*pinode == NULL) { |
b9a3260f SF |
632 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
633 | int rc1 = 0; | |
b9a3260f SF |
634 | |
635 | rc1 = CIFSGetSrvInodeNumber(xid, pTcon, | |
0b8f18e3 | 636 | full_path, &fattr.cf_uniqueid, |
737b758c SF |
637 | cifs_sb->local_nls, |
638 | cifs_sb->mnt_cifs_flags & | |
639 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
ec06aedd | 640 | if (rc1 || !fattr.cf_uniqueid) { |
b6b38f70 | 641 | cFYI(1, "GetSrvInodeNum rc %d", rc1); |
0b8f18e3 | 642 | fattr.cf_uniqueid = iunique(sb, ROOT_I); |
ec06aedd | 643 | cifs_autodisable_serverino(cifs_sb); |
132ac7b7 | 644 | } |
132ac7b7 | 645 | } else { |
0b8f18e3 | 646 | fattr.cf_uniqueid = iunique(sb, ROOT_I); |
132ac7b7 | 647 | } |
b9a3260f | 648 | } else { |
0b8f18e3 | 649 | fattr.cf_uniqueid = CIFS_I(*pinode)->uniqueid; |
b9a3260f SF |
650 | } |
651 | ||
0b8f18e3 JL |
652 | /* query for SFU type info if supported and needed */ |
653 | if (fattr.cf_cifsattrs & ATTR_SYSTEM && | |
654 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { | |
655 | tmprc = cifs_sfu_type(&fattr, full_path, cifs_sb, xid); | |
656 | if (tmprc) | |
b6b38f70 | 657 | cFYI(1, "cifs_sfu_type failed: %d", tmprc); |
b9a3260f | 658 | } |
1da177e4 | 659 | |
4879b448 | 660 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
b9a3260f SF |
661 | /* fill in 0777 bits from ACL */ |
662 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { | |
b6b38f70 | 663 | cFYI(1, "Getting mode bits from ACL"); |
0b8f18e3 | 664 | cifs_acl_to_fattr(cifs_sb, &fattr, *pinode, full_path, pfid); |
b9a3260f | 665 | } |
4879b448 | 666 | #endif |
b9a3260f | 667 | |
0b8f18e3 JL |
668 | /* fill in remaining high mode bits e.g. SUID, VTX */ |
669 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) | |
670 | cifs_sfu_mode(&fattr, full_path, cifs_sb, xid); | |
b9a3260f | 671 | |
1b12b9c1 SM |
672 | /* check for Minshall+French symlinks */ |
673 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) { | |
674 | tmprc = CIFSCheckMFSymlink(&fattr, full_path, cifs_sb, xid); | |
675 | if (tmprc) | |
676 | cFYI(1, "CIFSCheckMFSymlink: %d", tmprc); | |
677 | } | |
678 | ||
0b8f18e3 JL |
679 | if (!*pinode) { |
680 | *pinode = cifs_iget(sb, &fattr); | |
681 | if (!*pinode) | |
682 | rc = -ENOMEM; | |
683 | } else { | |
684 | cifs_fattr_to_inode(*pinode, &fattr); | |
685 | } | |
b9a3260f | 686 | |
7962670e | 687 | cgii_exit: |
1da177e4 LT |
688 | kfree(buf); |
689 | return rc; | |
690 | } | |
691 | ||
7f8ed420 SF |
692 | static const struct inode_operations cifs_ipc_inode_ops = { |
693 | .lookup = cifs_lookup, | |
694 | }; | |
695 | ||
e4cce94c | 696 | char *cifs_build_path_to_root(struct cifs_sb_info *cifs_sb) |
8be0ed44 SF |
697 | { |
698 | int pplen = cifs_sb->prepathlen; | |
699 | int dfsplen; | |
700 | char *full_path = NULL; | |
701 | ||
702 | /* if no prefix path, simply set path to the root of share to "" */ | |
703 | if (pplen == 0) { | |
704 | full_path = kmalloc(1, GFP_KERNEL); | |
705 | if (full_path) | |
706 | full_path[0] = 0; | |
707 | return full_path; | |
708 | } | |
709 | ||
a6e8a845 JL |
710 | if (cifs_sb_tcon(cifs_sb) && (cifs_sb_tcon(cifs_sb)->Flags & SMB_SHARE_IS_IN_DFS)) |
711 | dfsplen = strnlen(cifs_sb_tcon(cifs_sb)->treeName, MAX_TREE_SIZE + 1); | |
8be0ed44 SF |
712 | else |
713 | dfsplen = 0; | |
714 | ||
715 | full_path = kmalloc(dfsplen + pplen + 1, GFP_KERNEL); | |
716 | if (full_path == NULL) | |
717 | return full_path; | |
718 | ||
719 | if (dfsplen) { | |
a6e8a845 | 720 | strncpy(full_path, cifs_sb_tcon(cifs_sb)->treeName, dfsplen); |
8be0ed44 SF |
721 | /* switch slash direction in prepath depending on whether |
722 | * windows or posix style path names | |
723 | */ | |
724 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) { | |
725 | int i; | |
726 | for (i = 0; i < dfsplen; i++) { | |
727 | if (full_path[i] == '\\') | |
728 | full_path[i] = '/'; | |
729 | } | |
730 | } | |
731 | } | |
732 | strncpy(full_path + dfsplen, cifs_sb->prepath, pplen); | |
733 | full_path[dfsplen + pplen] = 0; /* add trailing null */ | |
734 | return full_path; | |
735 | } | |
736 | ||
cc0bad75 JL |
737 | static int |
738 | cifs_find_inode(struct inode *inode, void *opaque) | |
739 | { | |
740 | struct cifs_fattr *fattr = (struct cifs_fattr *) opaque; | |
741 | ||
f30b9c11 | 742 | /* don't match inode with different uniqueid */ |
cc0bad75 JL |
743 | if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid) |
744 | return 0; | |
745 | ||
f30b9c11 JL |
746 | /* don't match inode of different type */ |
747 | if ((inode->i_mode & S_IFMT) != (fattr->cf_mode & S_IFMT)) | |
748 | return 0; | |
749 | ||
5acfec25 JL |
750 | /* if it's not a directory or has no dentries, then flag it */ |
751 | if (S_ISDIR(inode->i_mode) && !list_empty(&inode->i_dentry)) | |
3d694380 | 752 | fattr->cf_flags |= CIFS_FATTR_INO_COLLISION; |
3d694380 | 753 | |
cc0bad75 JL |
754 | return 1; |
755 | } | |
756 | ||
757 | static int | |
758 | cifs_init_inode(struct inode *inode, void *opaque) | |
759 | { | |
760 | struct cifs_fattr *fattr = (struct cifs_fattr *) opaque; | |
761 | ||
762 | CIFS_I(inode)->uniqueid = fattr->cf_uniqueid; | |
763 | return 0; | |
764 | } | |
765 | ||
5acfec25 JL |
766 | /* |
767 | * walk dentry list for an inode and report whether it has aliases that | |
768 | * are hashed. We use this to determine if a directory inode can actually | |
769 | * be used. | |
770 | */ | |
771 | static bool | |
772 | inode_has_hashed_dentries(struct inode *inode) | |
773 | { | |
774 | struct dentry *dentry; | |
775 | ||
776 | spin_lock(&dcache_lock); | |
777 | list_for_each_entry(dentry, &inode->i_dentry, d_alias) { | |
778 | if (!d_unhashed(dentry) || IS_ROOT(dentry)) { | |
779 | spin_unlock(&dcache_lock); | |
780 | return true; | |
781 | } | |
782 | } | |
783 | spin_unlock(&dcache_lock); | |
784 | return false; | |
785 | } | |
786 | ||
cc0bad75 JL |
787 | /* Given fattrs, get a corresponding inode */ |
788 | struct inode * | |
789 | cifs_iget(struct super_block *sb, struct cifs_fattr *fattr) | |
790 | { | |
791 | unsigned long hash; | |
792 | struct inode *inode; | |
793 | ||
3d694380 | 794 | retry_iget5_locked: |
b6b38f70 | 795 | cFYI(1, "looking for uniqueid=%llu", fattr->cf_uniqueid); |
cc0bad75 JL |
796 | |
797 | /* hash down to 32-bits on 32-bit arch */ | |
798 | hash = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid); | |
799 | ||
800 | inode = iget5_locked(sb, hash, cifs_find_inode, cifs_init_inode, fattr); | |
cc0bad75 | 801 | if (inode) { |
5acfec25 | 802 | /* was there a potentially problematic inode collision? */ |
3d694380 | 803 | if (fattr->cf_flags & CIFS_FATTR_INO_COLLISION) { |
3d694380 | 804 | fattr->cf_flags &= ~CIFS_FATTR_INO_COLLISION; |
5acfec25 JL |
805 | |
806 | if (inode_has_hashed_dentries(inode)) { | |
807 | cifs_autodisable_serverino(CIFS_SB(sb)); | |
808 | iput(inode); | |
809 | fattr->cf_uniqueid = iunique(sb, ROOT_I); | |
810 | goto retry_iget5_locked; | |
811 | } | |
3d694380 JL |
812 | } |
813 | ||
cc0bad75 JL |
814 | cifs_fattr_to_inode(inode, fattr); |
815 | if (sb->s_flags & MS_NOATIME) | |
816 | inode->i_flags |= S_NOATIME | S_NOCMTIME; | |
817 | if (inode->i_state & I_NEW) { | |
818 | inode->i_ino = hash; | |
0ccd4802 | 819 | #ifdef CONFIG_CIFS_FSCACHE |
9451a9a5 SJ |
820 | /* initialize per-inode cache cookie pointer */ |
821 | CIFS_I(inode)->fscache = NULL; | |
0ccd4802 | 822 | #endif |
cc0bad75 JL |
823 | unlock_new_inode(inode); |
824 | } | |
825 | } | |
826 | ||
827 | return inode; | |
828 | } | |
829 | ||
1da177e4 | 830 | /* gets root inode */ |
bd433d4c | 831 | struct inode *cifs_root_iget(struct super_block *sb, unsigned long ino) |
1da177e4 | 832 | { |
ce634ab2 | 833 | int xid; |
1da177e4 | 834 | struct cifs_sb_info *cifs_sb; |
cc0bad75 | 835 | struct inode *inode = NULL; |
ce634ab2 | 836 | long rc; |
8be0ed44 | 837 | char *full_path; |
ce634ab2 | 838 | |
cc0bad75 | 839 | cifs_sb = CIFS_SB(sb); |
e4cce94c | 840 | full_path = cifs_build_path_to_root(cifs_sb); |
8be0ed44 SF |
841 | if (full_path == NULL) |
842 | return ERR_PTR(-ENOMEM); | |
c18c842b | 843 | |
8be0ed44 | 844 | xid = GetXid(); |
a6e8a845 | 845 | if (cifs_sb_tcon(cifs_sb)->unix_ext) |
cc0bad75 | 846 | rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid); |
0b8f18e3 JL |
847 | else |
848 | rc = cifs_get_inode_info(&inode, full_path, NULL, sb, | |
8be0ed44 | 849 | xid, NULL); |
0b8f18e3 JL |
850 | |
851 | if (!inode) | |
f0138a79 | 852 | return ERR_PTR(rc); |
cc0bad75 | 853 | |
0ccd4802 | 854 | #ifdef CONFIG_CIFS_FSCACHE |
d03382ce | 855 | /* populate tcon->resource_id */ |
a6e8a845 | 856 | cifs_sb_tcon(cifs_sb)->resource_id = CIFS_I(inode)->uniqueid; |
0ccd4802 | 857 | #endif |
d03382ce | 858 | |
a6e8a845 | 859 | if (rc && cifs_sb_tcon(cifs_sb)->ipc) { |
b6b38f70 | 860 | cFYI(1, "ipc connection - fake read inode"); |
7f8ed420 SF |
861 | inode->i_mode |= S_IFDIR; |
862 | inode->i_nlink = 2; | |
863 | inode->i_op = &cifs_ipc_inode_ops; | |
864 | inode->i_fop = &simple_dir_operations; | |
865 | inode->i_uid = cifs_sb->mnt_uid; | |
866 | inode->i_gid = cifs_sb->mnt_gid; | |
ad661334 | 867 | } else if (rc) { |
8be0ed44 | 868 | kfree(full_path); |
ce634ab2 DH |
869 | _FreeXid(xid); |
870 | iget_failed(inode); | |
871 | return ERR_PTR(rc); | |
7f8ed420 SF |
872 | } |
873 | ||
ce634ab2 | 874 | |
8be0ed44 | 875 | kfree(full_path); |
ce634ab2 DH |
876 | /* can not call macro FreeXid here since in a void func |
877 | * TODO: This is no longer true | |
878 | */ | |
1da177e4 | 879 | _FreeXid(xid); |
ce634ab2 | 880 | return inode; |
1da177e4 LT |
881 | } |
882 | ||
388e57b2 SF |
883 | static int |
884 | cifs_set_file_info(struct inode *inode, struct iattr *attrs, int xid, | |
885 | char *full_path, __u32 dosattr) | |
886 | { | |
887 | int rc; | |
888 | int oplock = 0; | |
889 | __u16 netfid; | |
890 | __u32 netpid; | |
891 | bool set_time = false; | |
892 | struct cifsFileInfo *open_file; | |
893 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); | |
894 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
ba00ba64 | 895 | struct cifsTconInfo *pTcon; |
388e57b2 SF |
896 | FILE_BASIC_INFO info_buf; |
897 | ||
1adcb710 SF |
898 | if (attrs == NULL) |
899 | return -EINVAL; | |
900 | ||
388e57b2 SF |
901 | if (attrs->ia_valid & ATTR_ATIME) { |
902 | set_time = true; | |
903 | info_buf.LastAccessTime = | |
904 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime)); | |
905 | } else | |
906 | info_buf.LastAccessTime = 0; | |
907 | ||
908 | if (attrs->ia_valid & ATTR_MTIME) { | |
909 | set_time = true; | |
910 | info_buf.LastWriteTime = | |
911 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime)); | |
912 | } else | |
913 | info_buf.LastWriteTime = 0; | |
914 | ||
915 | /* | |
916 | * Samba throws this field away, but windows may actually use it. | |
917 | * Do not set ctime unless other time stamps are changed explicitly | |
918 | * (i.e. by utimes()) since we would then have a mix of client and | |
919 | * server times. | |
920 | */ | |
921 | if (set_time && (attrs->ia_valid & ATTR_CTIME)) { | |
b6b38f70 | 922 | cFYI(1, "CIFS - CTIME changed"); |
388e57b2 SF |
923 | info_buf.ChangeTime = |
924 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime)); | |
925 | } else | |
926 | info_buf.ChangeTime = 0; | |
927 | ||
928 | info_buf.CreationTime = 0; /* don't change */ | |
929 | info_buf.Attributes = cpu_to_le32(dosattr); | |
930 | ||
931 | /* | |
932 | * If the file is already open for write, just use that fileid | |
933 | */ | |
934 | open_file = find_writable_file(cifsInode); | |
935 | if (open_file) { | |
936 | netfid = open_file->netfid; | |
937 | netpid = open_file->pid; | |
ba00ba64 | 938 | pTcon = open_file->tcon; |
388e57b2 SF |
939 | goto set_via_filehandle; |
940 | } | |
941 | ||
a6e8a845 | 942 | pTcon = cifs_sb_tcon(cifs_sb); |
ba00ba64 | 943 | |
388e57b2 SF |
944 | /* |
945 | * NT4 apparently returns success on this call, but it doesn't | |
946 | * really work. | |
947 | */ | |
948 | if (!(pTcon->ses->flags & CIFS_SES_NT4)) { | |
949 | rc = CIFSSMBSetPathInfo(xid, pTcon, full_path, | |
950 | &info_buf, cifs_sb->local_nls, | |
951 | cifs_sb->mnt_cifs_flags & | |
952 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
6b37faa1 JL |
953 | if (rc == 0) { |
954 | cifsInode->cifsAttrs = dosattr; | |
955 | goto out; | |
956 | } else if (rc != -EOPNOTSUPP && rc != -EINVAL) | |
388e57b2 SF |
957 | goto out; |
958 | } | |
959 | ||
b6b38f70 JP |
960 | cFYI(1, "calling SetFileInfo since SetPathInfo for " |
961 | "times not supported by this server"); | |
388e57b2 SF |
962 | rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, |
963 | SYNCHRONIZE | FILE_WRITE_ATTRIBUTES, | |
964 | CREATE_NOT_DIR, &netfid, &oplock, | |
965 | NULL, cifs_sb->local_nls, | |
966 | cifs_sb->mnt_cifs_flags & | |
967 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
968 | ||
969 | if (rc != 0) { | |
970 | if (rc == -EIO) | |
971 | rc = -EINVAL; | |
972 | goto out; | |
973 | } | |
974 | ||
975 | netpid = current->tgid; | |
976 | ||
977 | set_via_filehandle: | |
978 | rc = CIFSSMBSetFileInfo(xid, pTcon, &info_buf, netfid, netpid); | |
d388908e SF |
979 | if (!rc) |
980 | cifsInode->cifsAttrs = dosattr; | |
981 | ||
388e57b2 SF |
982 | if (open_file == NULL) |
983 | CIFSSMBClose(xid, pTcon, netfid); | |
984 | else | |
6ab409b5 | 985 | cifsFileInfo_put(open_file); |
388e57b2 SF |
986 | out: |
987 | return rc; | |
988 | } | |
989 | ||
a12a1ac7 JL |
990 | /* |
991 | * open the given file (if it isn't already), set the DELETE_ON_CLOSE bit | |
992 | * and rename it to a random name that hopefully won't conflict with | |
993 | * anything else. | |
994 | */ | |
995 | static int | |
3270958b | 996 | cifs_rename_pending_delete(char *full_path, struct dentry *dentry, int xid) |
a12a1ac7 JL |
997 | { |
998 | int oplock = 0; | |
999 | int rc; | |
1000 | __u16 netfid; | |
3270958b | 1001 | struct inode *inode = dentry->d_inode; |
a12a1ac7 JL |
1002 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
1003 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
a6e8a845 | 1004 | struct cifsTconInfo *tcon = cifs_sb_tcon(cifs_sb); |
3270958b SF |
1005 | __u32 dosattr, origattr; |
1006 | FILE_BASIC_INFO *info_buf = NULL; | |
a12a1ac7 JL |
1007 | |
1008 | rc = CIFSSMBOpen(xid, tcon, full_path, FILE_OPEN, | |
dd1db2de | 1009 | DELETE|FILE_WRITE_ATTRIBUTES, CREATE_NOT_DIR, |
a12a1ac7 JL |
1010 | &netfid, &oplock, NULL, cifs_sb->local_nls, |
1011 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1012 | if (rc != 0) | |
1013 | goto out; | |
1014 | ||
3270958b SF |
1015 | origattr = cifsInode->cifsAttrs; |
1016 | if (origattr == 0) | |
1017 | origattr |= ATTR_NORMAL; | |
1018 | ||
1019 | dosattr = origattr & ~ATTR_READONLY; | |
a12a1ac7 JL |
1020 | if (dosattr == 0) |
1021 | dosattr |= ATTR_NORMAL; | |
1022 | dosattr |= ATTR_HIDDEN; | |
1023 | ||
3270958b SF |
1024 | /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */ |
1025 | if (dosattr != origattr) { | |
1026 | info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL); | |
1027 | if (info_buf == NULL) { | |
1028 | rc = -ENOMEM; | |
1029 | goto out_close; | |
1030 | } | |
1031 | info_buf->Attributes = cpu_to_le32(dosattr); | |
1032 | rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid, | |
1033 | current->tgid); | |
1034 | /* although we would like to mark the file hidden | |
1035 | if that fails we will still try to rename it */ | |
41346098 | 1036 | if (rc != 0) |
3270958b SF |
1037 | cifsInode->cifsAttrs = dosattr; |
1038 | else | |
1039 | dosattr = origattr; /* since not able to change them */ | |
a12a1ac7 | 1040 | } |
a12a1ac7 | 1041 | |
dd1db2de JL |
1042 | /* rename the file */ |
1043 | rc = CIFSSMBRenameOpenFile(xid, tcon, netfid, NULL, cifs_sb->local_nls, | |
a12a1ac7 JL |
1044 | cifs_sb->mnt_cifs_flags & |
1045 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
3270958b SF |
1046 | if (rc != 0) { |
1047 | rc = -ETXTBSY; | |
1048 | goto undo_setattr; | |
1049 | } | |
6d22f098 | 1050 | |
3270958b SF |
1051 | /* try to set DELETE_ON_CLOSE */ |
1052 | if (!cifsInode->delete_pending) { | |
1053 | rc = CIFSSMBSetFileDisposition(xid, tcon, true, netfid, | |
1054 | current->tgid); | |
1055 | /* | |
1056 | * some samba versions return -ENOENT when we try to set the | |
1057 | * file disposition here. Likely a samba bug, but work around | |
1058 | * it for now. This means that some cifsXXX files may hang | |
1059 | * around after they shouldn't. | |
1060 | * | |
1061 | * BB: remove this hack after more servers have the fix | |
1062 | */ | |
1063 | if (rc == -ENOENT) | |
1064 | rc = 0; | |
1065 | else if (rc != 0) { | |
1066 | rc = -ETXTBSY; | |
1067 | goto undo_rename; | |
1068 | } | |
1069 | cifsInode->delete_pending = true; | |
1070 | } | |
7ce86d5a | 1071 | |
a12a1ac7 JL |
1072 | out_close: |
1073 | CIFSSMBClose(xid, tcon, netfid); | |
1074 | out: | |
3270958b | 1075 | kfree(info_buf); |
a12a1ac7 | 1076 | return rc; |
3270958b SF |
1077 | |
1078 | /* | |
1079 | * reset everything back to the original state. Don't bother | |
1080 | * dealing with errors here since we can't do anything about | |
1081 | * them anyway. | |
1082 | */ | |
1083 | undo_rename: | |
1084 | CIFSSMBRenameOpenFile(xid, tcon, netfid, dentry->d_name.name, | |
1085 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
1086 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1087 | undo_setattr: | |
1088 | if (dosattr != origattr) { | |
1089 | info_buf->Attributes = cpu_to_le32(origattr); | |
1090 | if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid, | |
1091 | current->tgid)) | |
1092 | cifsInode->cifsAttrs = origattr; | |
1093 | } | |
1094 | ||
1095 | goto out_close; | |
a12a1ac7 JL |
1096 | } |
1097 | ||
ff694527 SF |
1098 | |
1099 | /* | |
1100 | * If dentry->d_inode is null (usually meaning the cached dentry | |
1101 | * is a negative dentry) then we would attempt a standard SMB delete, but | |
af901ca1 AGR |
1102 | * if that fails we can not attempt the fall back mechanisms on EACCESS |
1103 | * but will return the EACCESS to the caller. Note that the VFS does not call | |
ff694527 SF |
1104 | * unlink on negative dentries currently. |
1105 | */ | |
5f0319a7 | 1106 | int cifs_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
1107 | { |
1108 | int rc = 0; | |
1109 | int xid; | |
1da177e4 | 1110 | char *full_path = NULL; |
5f0319a7 | 1111 | struct inode *inode = dentry->d_inode; |
ff694527 | 1112 | struct cifsInodeInfo *cifs_inode; |
5f0319a7 JL |
1113 | struct super_block *sb = dir->i_sb; |
1114 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
a6e8a845 | 1115 | struct cifsTconInfo *tcon = cifs_sb_tcon(cifs_sb); |
6050247d SF |
1116 | struct iattr *attrs = NULL; |
1117 | __u32 dosattr = 0, origattr = 0; | |
1da177e4 | 1118 | |
b6b38f70 | 1119 | cFYI(1, "cifs_unlink, dir=0x%p, dentry=0x%p", dir, dentry); |
1da177e4 LT |
1120 | |
1121 | xid = GetXid(); | |
1122 | ||
5f0319a7 JL |
1123 | /* Unlink can be called from rename so we can not take the |
1124 | * sb->s_vfs_rename_mutex here */ | |
1125 | full_path = build_path_from_dentry(dentry); | |
1da177e4 | 1126 | if (full_path == NULL) { |
0f3bc09e | 1127 | rc = -ENOMEM; |
1da177e4 | 1128 | FreeXid(xid); |
0f3bc09e | 1129 | return rc; |
1da177e4 | 1130 | } |
2d785a50 | 1131 | |
5f0319a7 | 1132 | if ((tcon->ses->capabilities & CAP_UNIX) && |
2d785a50 | 1133 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
5f0319a7 JL |
1134 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { |
1135 | rc = CIFSPOSIXDelFile(xid, tcon, full_path, | |
2d785a50 | 1136 | SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls, |
737b758c | 1137 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
b6b38f70 | 1138 | cFYI(1, "posix del rc %d", rc); |
2d785a50 SF |
1139 | if ((rc == 0) || (rc == -ENOENT)) |
1140 | goto psx_del_no_retry; | |
1141 | } | |
1da177e4 | 1142 | |
6050247d | 1143 | retry_std_delete: |
5f0319a7 | 1144 | rc = CIFSSMBDelFile(xid, tcon, full_path, cifs_sb->local_nls, |
2d785a50 | 1145 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
6050247d | 1146 | |
2d785a50 | 1147 | psx_del_no_retry: |
1da177e4 | 1148 | if (!rc) { |
5f0319a7 JL |
1149 | if (inode) |
1150 | drop_nlink(inode); | |
1da177e4 | 1151 | } else if (rc == -ENOENT) { |
5f0319a7 | 1152 | d_drop(dentry); |
1da177e4 | 1153 | } else if (rc == -ETXTBSY) { |
3270958b | 1154 | rc = cifs_rename_pending_delete(full_path, dentry, xid); |
a12a1ac7 JL |
1155 | if (rc == 0) |
1156 | drop_nlink(inode); | |
ff694527 | 1157 | } else if ((rc == -EACCES) && (dosattr == 0) && inode) { |
388e57b2 SF |
1158 | attrs = kzalloc(sizeof(*attrs), GFP_KERNEL); |
1159 | if (attrs == NULL) { | |
1160 | rc = -ENOMEM; | |
1161 | goto out_reval; | |
1da177e4 | 1162 | } |
388e57b2 SF |
1163 | |
1164 | /* try to reset dos attributes */ | |
ff694527 SF |
1165 | cifs_inode = CIFS_I(inode); |
1166 | origattr = cifs_inode->cifsAttrs; | |
6050247d SF |
1167 | if (origattr == 0) |
1168 | origattr |= ATTR_NORMAL; | |
1169 | dosattr = origattr & ~ATTR_READONLY; | |
388e57b2 SF |
1170 | if (dosattr == 0) |
1171 | dosattr |= ATTR_NORMAL; | |
1172 | dosattr |= ATTR_HIDDEN; | |
1173 | ||
1174 | rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); | |
388e57b2 SF |
1175 | if (rc != 0) |
1176 | goto out_reval; | |
6050247d SF |
1177 | |
1178 | goto retry_std_delete; | |
1da177e4 | 1179 | } |
6050247d SF |
1180 | |
1181 | /* undo the setattr if we errored out and it's needed */ | |
1182 | if (rc != 0 && dosattr != 0) | |
1183 | cifs_set_file_info(inode, attrs, xid, full_path, origattr); | |
1184 | ||
388e57b2 | 1185 | out_reval: |
4523cc30 | 1186 | if (inode) { |
ff694527 SF |
1187 | cifs_inode = CIFS_I(inode); |
1188 | cifs_inode->time = 0; /* will force revalidate to get info | |
5f0319a7 JL |
1189 | when needed */ |
1190 | inode->i_ctime = current_fs_time(sb); | |
06bcfedd | 1191 | } |
5f0319a7 | 1192 | dir->i_ctime = dir->i_mtime = current_fs_time(sb); |
ff694527 | 1193 | cifs_inode = CIFS_I(dir); |
6050247d | 1194 | CIFS_I(dir)->time = 0; /* force revalidate of dir as well */ |
1da177e4 LT |
1195 | |
1196 | kfree(full_path); | |
6050247d | 1197 | kfree(attrs); |
1da177e4 LT |
1198 | FreeXid(xid); |
1199 | return rc; | |
1200 | } | |
1201 | ||
1202 | int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode) | |
1203 | { | |
6b37faa1 | 1204 | int rc = 0, tmprc; |
1da177e4 LT |
1205 | int xid; |
1206 | struct cifs_sb_info *cifs_sb; | |
1207 | struct cifsTconInfo *pTcon; | |
1208 | char *full_path = NULL; | |
1209 | struct inode *newinode = NULL; | |
cc0bad75 | 1210 | struct cifs_fattr fattr; |
1da177e4 | 1211 | |
b6b38f70 | 1212 | cFYI(1, "In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode); |
1da177e4 LT |
1213 | |
1214 | xid = GetXid(); | |
1215 | ||
1216 | cifs_sb = CIFS_SB(inode->i_sb); | |
a6e8a845 | 1217 | pTcon = cifs_sb_tcon(cifs_sb); |
1da177e4 | 1218 | |
7f57356b | 1219 | full_path = build_path_from_dentry(direntry); |
1da177e4 | 1220 | if (full_path == NULL) { |
0f3bc09e | 1221 | rc = -ENOMEM; |
1da177e4 | 1222 | FreeXid(xid); |
0f3bc09e | 1223 | return rc; |
1da177e4 | 1224 | } |
50c2f753 | 1225 | |
fb8c4b14 SF |
1226 | if ((pTcon->ses->capabilities & CAP_UNIX) && |
1227 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & | |
2dd29d31 SF |
1228 | le64_to_cpu(pTcon->fsUnixInfo.Capability))) { |
1229 | u32 oplock = 0; | |
f6d09982 | 1230 | FILE_UNIX_BASIC_INFO *pInfo = |
2dd29d31 | 1231 | kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL); |
fb8c4b14 | 1232 | if (pInfo == NULL) { |
2dd29d31 SF |
1233 | rc = -ENOMEM; |
1234 | goto mkdir_out; | |
1235 | } | |
50c2f753 | 1236 | |
ce3b0f8d | 1237 | mode &= ~current_umask(); |
2dd29d31 SF |
1238 | rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT, |
1239 | mode, NULL /* netfid */, pInfo, &oplock, | |
fb8c4b14 SF |
1240 | full_path, cifs_sb->local_nls, |
1241 | cifs_sb->mnt_cifs_flags & | |
2dd29d31 | 1242 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
c45d707f SF |
1243 | if (rc == -EOPNOTSUPP) { |
1244 | kfree(pInfo); | |
1245 | goto mkdir_retry_old; | |
1246 | } else if (rc) { | |
b6b38f70 | 1247 | cFYI(1, "posix mkdir returned 0x%x", rc); |
2dd29d31 SF |
1248 | d_drop(direntry); |
1249 | } else { | |
8f2376ad CG |
1250 | if (pInfo->Type == cpu_to_le32(-1)) { |
1251 | /* no return info, go query for it */ | |
5a07cdf8 | 1252 | kfree(pInfo); |
fb8c4b14 | 1253 | goto mkdir_get_info; |
5a07cdf8 | 1254 | } |
fb8c4b14 SF |
1255 | /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need |
1256 | to set uid/gid */ | |
2dd29d31 SF |
1257 | inc_nlink(inode); |
1258 | if (pTcon->nocase) | |
1259 | direntry->d_op = &cifs_ci_dentry_ops; | |
1260 | else | |
1261 | direntry->d_op = &cifs_dentry_ops; | |
cbac3cba | 1262 | |
cc0bad75 | 1263 | cifs_unix_basic_to_fattr(&fattr, pInfo, cifs_sb); |
4065c802 | 1264 | cifs_fill_uniqueid(inode->i_sb, &fattr); |
cc0bad75 JL |
1265 | newinode = cifs_iget(inode->i_sb, &fattr); |
1266 | if (!newinode) { | |
5a07cdf8 | 1267 | kfree(pInfo); |
cbac3cba | 1268 | goto mkdir_get_info; |
5a07cdf8 | 1269 | } |
6b37faa1 | 1270 | |
2dd29d31 | 1271 | d_instantiate(direntry, newinode); |
cbac3cba | 1272 | |
cbac3cba | 1273 | #ifdef CONFIG_CIFS_DEBUG2 |
b6b38f70 JP |
1274 | cFYI(1, "instantiated dentry %p %s to inode %p", |
1275 | direntry, direntry->d_name.name, newinode); | |
cbac3cba | 1276 | |
fb8c4b14 | 1277 | if (newinode->i_nlink != 2) |
b6b38f70 JP |
1278 | cFYI(1, "unexpected number of links %d", |
1279 | newinode->i_nlink); | |
cbac3cba | 1280 | #endif |
2dd29d31 SF |
1281 | } |
1282 | kfree(pInfo); | |
1283 | goto mkdir_out; | |
fb8c4b14 | 1284 | } |
c45d707f | 1285 | mkdir_retry_old: |
1da177e4 | 1286 | /* BB add setting the equivalent of mode via CreateX w/ACLs */ |
737b758c SF |
1287 | rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls, |
1288 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 | 1289 | if (rc) { |
b6b38f70 | 1290 | cFYI(1, "cifs_mkdir returned 0x%x", rc); |
1da177e4 LT |
1291 | d_drop(direntry); |
1292 | } else { | |
fb8c4b14 | 1293 | mkdir_get_info: |
d8c76e6f | 1294 | inc_nlink(inode); |
c18c842b | 1295 | if (pTcon->unix_ext) |
1da177e4 | 1296 | rc = cifs_get_inode_info_unix(&newinode, full_path, |
fb8c4b14 | 1297 | inode->i_sb, xid); |
1da177e4 LT |
1298 | else |
1299 | rc = cifs_get_inode_info(&newinode, full_path, NULL, | |
8b1327f6 | 1300 | inode->i_sb, xid, NULL); |
1da177e4 | 1301 | |
b92327fe SF |
1302 | if (pTcon->nocase) |
1303 | direntry->d_op = &cifs_ci_dentry_ops; | |
1304 | else | |
1305 | direntry->d_op = &cifs_dentry_ops; | |
1da177e4 | 1306 | d_instantiate(direntry, newinode); |
2dd29d31 | 1307 | /* setting nlink not necessary except in cases where we |
fb8c4b14 | 1308 | * failed to get it from the server or was set bogus */ |
2dd29d31 | 1309 | if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2)) |
fb8c4b14 | 1310 | direntry->d_inode->i_nlink = 2; |
95089910 | 1311 | |
ce3b0f8d | 1312 | mode &= ~current_umask(); |
95089910 JL |
1313 | /* must turn on setgid bit if parent dir has it */ |
1314 | if (inode->i_mode & S_ISGID) | |
1315 | mode |= S_ISGID; | |
1316 | ||
c18c842b | 1317 | if (pTcon->unix_ext) { |
4e1e7fb9 JL |
1318 | struct cifs_unix_set_info_args args = { |
1319 | .mode = mode, | |
1320 | .ctime = NO_CHANGE_64, | |
1321 | .atime = NO_CHANGE_64, | |
1322 | .mtime = NO_CHANGE_64, | |
1323 | .device = 0, | |
1324 | }; | |
d0d2f2df | 1325 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
a001e5b5 | 1326 | args.uid = (__u64)current_fsuid(); |
95089910 JL |
1327 | if (inode->i_mode & S_ISGID) |
1328 | args.gid = (__u64)inode->i_gid; | |
1329 | else | |
a001e5b5 | 1330 | args.gid = (__u64)current_fsgid(); |
1da177e4 | 1331 | } else { |
4e1e7fb9 JL |
1332 | args.uid = NO_CHANGE_64; |
1333 | args.gid = NO_CHANGE_64; | |
1da177e4 | 1334 | } |
01ea95e3 JL |
1335 | CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, &args, |
1336 | cifs_sb->local_nls, | |
1337 | cifs_sb->mnt_cifs_flags & | |
1338 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
3ce53fc4 | 1339 | } else { |
67750fb9 JL |
1340 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) && |
1341 | (mode & S_IWUGO) == 0) { | |
1342 | FILE_BASIC_INFO pInfo; | |
6b37faa1 JL |
1343 | struct cifsInodeInfo *cifsInode; |
1344 | u32 dosattrs; | |
1345 | ||
67750fb9 | 1346 | memset(&pInfo, 0, sizeof(pInfo)); |
6b37faa1 JL |
1347 | cifsInode = CIFS_I(newinode); |
1348 | dosattrs = cifsInode->cifsAttrs|ATTR_READONLY; | |
1349 | pInfo.Attributes = cpu_to_le32(dosattrs); | |
1350 | tmprc = CIFSSMBSetPathInfo(xid, pTcon, | |
1351 | full_path, &pInfo, | |
1352 | cifs_sb->local_nls, | |
67750fb9 JL |
1353 | cifs_sb->mnt_cifs_flags & |
1354 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
6b37faa1 JL |
1355 | if (tmprc == 0) |
1356 | cifsInode->cifsAttrs = dosattrs; | |
67750fb9 | 1357 | } |
fb8c4b14 | 1358 | if (direntry->d_inode) { |
b0fd30d3 JL |
1359 | if (cifs_sb->mnt_cifs_flags & |
1360 | CIFS_MOUNT_DYNPERM) | |
1361 | direntry->d_inode->i_mode = | |
1362 | (mode | S_IFDIR); | |
4e94a105 | 1363 | |
fb8c4b14 | 1364 | if (cifs_sb->mnt_cifs_flags & |
6473a559 | 1365 | CIFS_MOUNT_SET_UID) { |
fb8c4b14 | 1366 | direntry->d_inode->i_uid = |
a001e5b5 | 1367 | current_fsuid(); |
95089910 JL |
1368 | if (inode->i_mode & S_ISGID) |
1369 | direntry->d_inode->i_gid = | |
1370 | inode->i_gid; | |
1371 | else | |
1372 | direntry->d_inode->i_gid = | |
a001e5b5 | 1373 | current_fsgid(); |
6473a559 SF |
1374 | } |
1375 | } | |
2a138ebb | 1376 | } |
1da177e4 | 1377 | } |
fb8c4b14 | 1378 | mkdir_out: |
1da177e4 LT |
1379 | kfree(full_path); |
1380 | FreeXid(xid); | |
1381 | return rc; | |
1382 | } | |
1383 | ||
1384 | int cifs_rmdir(struct inode *inode, struct dentry *direntry) | |
1385 | { | |
1386 | int rc = 0; | |
1387 | int xid; | |
1388 | struct cifs_sb_info *cifs_sb; | |
1389 | struct cifsTconInfo *pTcon; | |
1390 | char *full_path = NULL; | |
1391 | struct cifsInodeInfo *cifsInode; | |
1392 | ||
b6b38f70 | 1393 | cFYI(1, "cifs_rmdir, inode = 0x%p", inode); |
1da177e4 LT |
1394 | |
1395 | xid = GetXid(); | |
1396 | ||
1397 | cifs_sb = CIFS_SB(inode->i_sb); | |
a6e8a845 | 1398 | pTcon = cifs_sb_tcon(cifs_sb); |
1da177e4 | 1399 | |
7f57356b | 1400 | full_path = build_path_from_dentry(direntry); |
1da177e4 | 1401 | if (full_path == NULL) { |
0f3bc09e | 1402 | rc = -ENOMEM; |
1da177e4 | 1403 | FreeXid(xid); |
0f3bc09e | 1404 | return rc; |
1da177e4 LT |
1405 | } |
1406 | ||
737b758c SF |
1407 | rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls, |
1408 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
1409 | |
1410 | if (!rc) { | |
9a53c3a7 | 1411 | drop_nlink(inode); |
3677db10 | 1412 | spin_lock(&direntry->d_inode->i_lock); |
fb8c4b14 | 1413 | i_size_write(direntry->d_inode, 0); |
ce71ec36 | 1414 | clear_nlink(direntry->d_inode); |
3677db10 | 1415 | spin_unlock(&direntry->d_inode->i_lock); |
1da177e4 LT |
1416 | } |
1417 | ||
1418 | cifsInode = CIFS_I(direntry->d_inode); | |
1419 | cifsInode->time = 0; /* force revalidate to go get info when | |
1420 | needed */ | |
42c24544 SF |
1421 | |
1422 | cifsInode = CIFS_I(inode); | |
1423 | cifsInode->time = 0; /* force revalidate to get parent dir info | |
1424 | since cached search results now invalid */ | |
1425 | ||
1da177e4 LT |
1426 | direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime = |
1427 | current_fs_time(inode->i_sb); | |
1428 | ||
1429 | kfree(full_path); | |
1430 | FreeXid(xid); | |
1431 | return rc; | |
1432 | } | |
1433 | ||
ee2fd967 SF |
1434 | static int |
1435 | cifs_do_rename(int xid, struct dentry *from_dentry, const char *fromPath, | |
1436 | struct dentry *to_dentry, const char *toPath) | |
1437 | { | |
1438 | struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb); | |
a6e8a845 | 1439 | struct cifsTconInfo *pTcon = cifs_sb_tcon(cifs_sb); |
ee2fd967 SF |
1440 | __u16 srcfid; |
1441 | int oplock, rc; | |
1442 | ||
1443 | /* try path-based rename first */ | |
1444 | rc = CIFSSMBRename(xid, pTcon, fromPath, toPath, cifs_sb->local_nls, | |
1445 | cifs_sb->mnt_cifs_flags & | |
1446 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1447 | ||
1448 | /* | |
1449 | * don't bother with rename by filehandle unless file is busy and | |
1450 | * source Note that cross directory moves do not work with | |
1451 | * rename by filehandle to various Windows servers. | |
1452 | */ | |
1453 | if (rc == 0 || rc != -ETXTBSY) | |
1454 | return rc; | |
1455 | ||
ed0e3ace JL |
1456 | /* open-file renames don't work across directories */ |
1457 | if (to_dentry->d_parent != from_dentry->d_parent) | |
1458 | return rc; | |
1459 | ||
ee2fd967 SF |
1460 | /* open the file to be renamed -- we need DELETE perms */ |
1461 | rc = CIFSSMBOpen(xid, pTcon, fromPath, FILE_OPEN, DELETE, | |
1462 | CREATE_NOT_DIR, &srcfid, &oplock, NULL, | |
1463 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
1464 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1465 | ||
1466 | if (rc == 0) { | |
1467 | rc = CIFSSMBRenameOpenFile(xid, pTcon, srcfid, | |
1468 | (const char *) to_dentry->d_name.name, | |
1469 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
1470 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1471 | ||
1472 | CIFSSMBClose(xid, pTcon, srcfid); | |
1473 | } | |
1474 | ||
1475 | return rc; | |
1476 | } | |
1477 | ||
14121bdc JL |
1478 | int cifs_rename(struct inode *source_dir, struct dentry *source_dentry, |
1479 | struct inode *target_dir, struct dentry *target_dentry) | |
1da177e4 | 1480 | { |
ee2fd967 SF |
1481 | char *fromName = NULL; |
1482 | char *toName = NULL; | |
639e7a91 | 1483 | struct cifs_sb_info *cifs_sb; |
14121bdc | 1484 | struct cifsTconInfo *tcon; |
ee2fd967 SF |
1485 | FILE_UNIX_BASIC_INFO *info_buf_source = NULL; |
1486 | FILE_UNIX_BASIC_INFO *info_buf_target; | |
8d281efb | 1487 | int xid, rc, tmprc; |
1da177e4 | 1488 | |
639e7a91 | 1489 | cifs_sb = CIFS_SB(source_dir->i_sb); |
a6e8a845 | 1490 | tcon = cifs_sb_tcon(cifs_sb); |
1da177e4 | 1491 | |
ee2fd967 SF |
1492 | xid = GetXid(); |
1493 | ||
ee2fd967 SF |
1494 | /* |
1495 | * we already have the rename sem so we do not need to | |
1496 | * grab it again here to protect the path integrity | |
1497 | */ | |
14121bdc | 1498 | fromName = build_path_from_dentry(source_dentry); |
ee2fd967 SF |
1499 | if (fromName == NULL) { |
1500 | rc = -ENOMEM; | |
1501 | goto cifs_rename_exit; | |
1502 | } | |
1503 | ||
14121bdc | 1504 | toName = build_path_from_dentry(target_dentry); |
ee2fd967 | 1505 | if (toName == NULL) { |
1da177e4 LT |
1506 | rc = -ENOMEM; |
1507 | goto cifs_rename_exit; | |
1508 | } | |
1509 | ||
14121bdc JL |
1510 | rc = cifs_do_rename(xid, source_dentry, fromName, |
1511 | target_dentry, toName); | |
ee2fd967 | 1512 | |
14121bdc JL |
1513 | if (rc == -EEXIST && tcon->unix_ext) { |
1514 | /* | |
1515 | * Are src and dst hardlinks of same inode? We can | |
1516 | * only tell with unix extensions enabled | |
1517 | */ | |
1518 | info_buf_source = | |
1519 | kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), | |
1520 | GFP_KERNEL); | |
1521 | if (info_buf_source == NULL) { | |
1522 | rc = -ENOMEM; | |
1523 | goto cifs_rename_exit; | |
1524 | } | |
1525 | ||
1526 | info_buf_target = info_buf_source + 1; | |
8d281efb | 1527 | tmprc = CIFSSMBUnixQPathInfo(xid, tcon, fromName, |
14121bdc | 1528 | info_buf_source, |
639e7a91 JL |
1529 | cifs_sb->local_nls, |
1530 | cifs_sb->mnt_cifs_flags & | |
14121bdc | 1531 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
8d281efb | 1532 | if (tmprc != 0) |
14121bdc | 1533 | goto unlink_target; |
ee2fd967 | 1534 | |
639e7a91 JL |
1535 | tmprc = CIFSSMBUnixQPathInfo(xid, tcon, toName, |
1536 | info_buf_target, | |
1537 | cifs_sb->local_nls, | |
1538 | cifs_sb->mnt_cifs_flags & | |
14121bdc JL |
1539 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1540 | ||
8d281efb | 1541 | if (tmprc == 0 && (info_buf_source->UniqueId == |
ae6884a9 | 1542 | info_buf_target->UniqueId)) { |
14121bdc | 1543 | /* same file, POSIX says that this is a noop */ |
ae6884a9 | 1544 | rc = 0; |
14121bdc | 1545 | goto cifs_rename_exit; |
ae6884a9 | 1546 | } |
14121bdc | 1547 | } /* else ... BB we could add the same check for Windows by |
ee2fd967 | 1548 | checking the UniqueId via FILE_INTERNAL_INFO */ |
14121bdc | 1549 | |
ee2fd967 | 1550 | unlink_target: |
fc6f3943 JL |
1551 | /* Try unlinking the target dentry if it's not negative */ |
1552 | if (target_dentry->d_inode && (rc == -EACCES || rc == -EEXIST)) { | |
8d281efb | 1553 | tmprc = cifs_unlink(target_dir, target_dentry); |
14121bdc JL |
1554 | if (tmprc) |
1555 | goto cifs_rename_exit; | |
1556 | ||
14121bdc JL |
1557 | rc = cifs_do_rename(xid, source_dentry, fromName, |
1558 | target_dentry, toName); | |
1da177e4 LT |
1559 | } |
1560 | ||
1561 | cifs_rename_exit: | |
ee2fd967 | 1562 | kfree(info_buf_source); |
1da177e4 LT |
1563 | kfree(fromName); |
1564 | kfree(toName); | |
1565 | FreeXid(xid); | |
1566 | return rc; | |
1567 | } | |
1568 | ||
df2cf170 JL |
1569 | static bool |
1570 | cifs_inode_needs_reval(struct inode *inode) | |
1da177e4 | 1571 | { |
df2cf170 | 1572 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
1da177e4 | 1573 | |
df2cf170 JL |
1574 | if (cifs_i->clientCanCacheRead) |
1575 | return false; | |
1da177e4 | 1576 | |
df2cf170 JL |
1577 | if (!lookupCacheEnabled) |
1578 | return true; | |
1da177e4 | 1579 | |
df2cf170 JL |
1580 | if (cifs_i->time == 0) |
1581 | return true; | |
1da177e4 | 1582 | |
df2cf170 JL |
1583 | /* FIXME: the actimeo should be tunable */ |
1584 | if (time_after_eq(jiffies, cifs_i->time + HZ)) | |
1585 | return true; | |
1586 | ||
db19272e JL |
1587 | /* hardlinked files w/ noserverino get "special" treatment */ |
1588 | if (!(CIFS_SB(inode->i_sb)->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) && | |
1589 | S_ISREG(inode->i_mode) && inode->i_nlink != 1) | |
1590 | return true; | |
1591 | ||
df2cf170 JL |
1592 | return false; |
1593 | } | |
1594 | ||
1595 | /* check invalid_mapping flag and zap the cache if it's set */ | |
1596 | static void | |
1597 | cifs_invalidate_mapping(struct inode *inode) | |
1598 | { | |
1599 | int rc; | |
1600 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); | |
1601 | ||
1602 | cifs_i->invalid_mapping = false; | |
1603 | ||
1604 | /* write back any cached data */ | |
1605 | if (inode->i_mapping && inode->i_mapping->nrpages != 0) { | |
1606 | rc = filemap_write_and_wait(inode->i_mapping); | |
1607 | if (rc) | |
1608 | cifs_i->write_behind_rc = rc; | |
1609 | } | |
1610 | invalidate_remote_inode(inode); | |
9451a9a5 | 1611 | cifs_fscache_reset_inode_cookie(inode); |
df2cf170 JL |
1612 | } |
1613 | ||
abab095d JL |
1614 | int cifs_revalidate_file(struct file *filp) |
1615 | { | |
1616 | int rc = 0; | |
1617 | struct inode *inode = filp->f_path.dentry->d_inode; | |
ba00ba64 | 1618 | struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data; |
abab095d JL |
1619 | |
1620 | if (!cifs_inode_needs_reval(inode)) | |
1621 | goto check_inval; | |
1622 | ||
ba00ba64 | 1623 | if (cfile->tcon->unix_ext) |
abab095d JL |
1624 | rc = cifs_get_file_info_unix(filp); |
1625 | else | |
1626 | rc = cifs_get_file_info(filp); | |
1627 | ||
1628 | check_inval: | |
1629 | if (CIFS_I(inode)->invalid_mapping) | |
1630 | cifs_invalidate_mapping(inode); | |
1631 | ||
1632 | return rc; | |
1633 | } | |
1634 | ||
df2cf170 JL |
1635 | /* revalidate a dentry's inode attributes */ |
1636 | int cifs_revalidate_dentry(struct dentry *dentry) | |
1637 | { | |
1638 | int xid; | |
1639 | int rc = 0; | |
1640 | char *full_path = NULL; | |
1641 | struct inode *inode = dentry->d_inode; | |
1642 | struct super_block *sb = dentry->d_sb; | |
1643 | ||
1644 | if (inode == NULL) | |
1645 | return -ENOENT; | |
1da177e4 LT |
1646 | |
1647 | xid = GetXid(); | |
1648 | ||
df2cf170 JL |
1649 | if (!cifs_inode_needs_reval(inode)) |
1650 | goto check_inval; | |
1da177e4 LT |
1651 | |
1652 | /* can not safely grab the rename sem here if rename calls revalidate | |
1653 | since that would deadlock */ | |
df2cf170 | 1654 | full_path = build_path_from_dentry(dentry); |
1da177e4 | 1655 | if (full_path == NULL) { |
0f3bc09e | 1656 | rc = -ENOMEM; |
df2cf170 | 1657 | goto check_inval; |
1da177e4 LT |
1658 | } |
1659 | ||
f19159dc | 1660 | cFYI(1, "Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld " |
df2cf170 | 1661 | "jiffies %ld", full_path, inode, inode->i_count.counter, |
f19159dc | 1662 | dentry, dentry->d_time, jiffies); |
1da177e4 | 1663 | |
a6e8a845 | 1664 | if (cifs_sb_tcon(CIFS_SB(sb))->unix_ext) |
df2cf170 JL |
1665 | rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid); |
1666 | else | |
1667 | rc = cifs_get_inode_info(&inode, full_path, NULL, sb, | |
1668 | xid, NULL); | |
1da177e4 | 1669 | |
df2cf170 JL |
1670 | check_inval: |
1671 | if (CIFS_I(inode)->invalid_mapping) | |
1672 | cifs_invalidate_mapping(inode); | |
50c2f753 | 1673 | |
1da177e4 LT |
1674 | kfree(full_path); |
1675 | FreeXid(xid); | |
1676 | return rc; | |
1677 | } | |
1678 | ||
1679 | int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
1680 | struct kstat *stat) | |
1681 | { | |
df2cf170 | 1682 | int err = cifs_revalidate_dentry(dentry); |
5fe14c85 | 1683 | if (!err) { |
1da177e4 | 1684 | generic_fillattr(dentry->d_inode, stat); |
5fe14c85 | 1685 | stat->blksize = CIFS_MAX_MSGSIZE; |
cc0bad75 | 1686 | stat->ino = CIFS_I(dentry->d_inode)->uniqueid; |
5fe14c85 | 1687 | } |
1da177e4 LT |
1688 | return err; |
1689 | } | |
1690 | ||
1691 | static int cifs_truncate_page(struct address_space *mapping, loff_t from) | |
1692 | { | |
1693 | pgoff_t index = from >> PAGE_CACHE_SHIFT; | |
1694 | unsigned offset = from & (PAGE_CACHE_SIZE - 1); | |
1695 | struct page *page; | |
1da177e4 LT |
1696 | int rc = 0; |
1697 | ||
1698 | page = grab_cache_page(mapping, index); | |
1699 | if (!page) | |
1700 | return -ENOMEM; | |
1701 | ||
eebd2aa3 | 1702 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); |
1da177e4 LT |
1703 | unlock_page(page); |
1704 | page_cache_release(page); | |
1705 | return rc; | |
1706 | } | |
1707 | ||
1b947463 | 1708 | static void cifs_setsize(struct inode *inode, loff_t offset) |
3677db10 | 1709 | { |
c08d3b0e | 1710 | loff_t oldsize; |
3677db10 | 1711 | |
ba6a46a0 | 1712 | spin_lock(&inode->i_lock); |
c08d3b0e | 1713 | oldsize = inode->i_size; |
3677db10 | 1714 | i_size_write(inode, offset); |
ba6a46a0 | 1715 | spin_unlock(&inode->i_lock); |
1b947463 | 1716 | |
c08d3b0e | 1717 | truncate_pagecache(inode, oldsize, offset); |
3677db10 SF |
1718 | } |
1719 | ||
8efdbde6 JL |
1720 | static int |
1721 | cifs_set_file_size(struct inode *inode, struct iattr *attrs, | |
1722 | int xid, char *full_path) | |
1723 | { | |
1724 | int rc; | |
1725 | struct cifsFileInfo *open_file; | |
1726 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); | |
1727 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
ba00ba64 | 1728 | struct cifsTconInfo *pTcon = NULL; |
8efdbde6 JL |
1729 | |
1730 | /* | |
1731 | * To avoid spurious oplock breaks from server, in the case of | |
1732 | * inodes that we already have open, avoid doing path based | |
1733 | * setting of file size if we can do it by handle. | |
1734 | * This keeps our caching token (oplock) and avoids timeouts | |
1735 | * when the local oplock break takes longer to flush | |
1736 | * writebehind data than the SMB timeout for the SetPathInfo | |
1737 | * request would allow | |
1738 | */ | |
1739 | open_file = find_writable_file(cifsInode); | |
1740 | if (open_file) { | |
1741 | __u16 nfid = open_file->netfid; | |
1742 | __u32 npid = open_file->pid; | |
ba00ba64 | 1743 | pTcon = open_file->tcon; |
8efdbde6 JL |
1744 | rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size, nfid, |
1745 | npid, false); | |
6ab409b5 | 1746 | cifsFileInfo_put(open_file); |
b6b38f70 | 1747 | cFYI(1, "SetFSize for attrs rc = %d", rc); |
8efdbde6 JL |
1748 | if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { |
1749 | unsigned int bytes_written; | |
1750 | rc = CIFSSMBWrite(xid, pTcon, nfid, 0, attrs->ia_size, | |
1751 | &bytes_written, NULL, NULL, 1); | |
b6b38f70 | 1752 | cFYI(1, "Wrt seteof rc %d", rc); |
8efdbde6 JL |
1753 | } |
1754 | } else | |
1755 | rc = -EINVAL; | |
1756 | ||
1757 | if (rc != 0) { | |
ba00ba64 | 1758 | if (pTcon == NULL) |
a6e8a845 | 1759 | pTcon = cifs_sb_tcon(cifs_sb); |
ba00ba64 | 1760 | |
8efdbde6 JL |
1761 | /* Set file size by pathname rather than by handle |
1762 | either because no valid, writeable file handle for | |
1763 | it was found or because there was an error setting | |
1764 | it by handle */ | |
1765 | rc = CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, | |
1766 | false, cifs_sb->local_nls, | |
1767 | cifs_sb->mnt_cifs_flags & | |
1768 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
b6b38f70 | 1769 | cFYI(1, "SetEOF by path (setattrs) rc = %d", rc); |
8efdbde6 JL |
1770 | if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { |
1771 | __u16 netfid; | |
1772 | int oplock = 0; | |
1773 | ||
1774 | rc = SMBLegacyOpen(xid, pTcon, full_path, | |
1775 | FILE_OPEN, GENERIC_WRITE, | |
1776 | CREATE_NOT_DIR, &netfid, &oplock, NULL, | |
1777 | cifs_sb->local_nls, | |
1778 | cifs_sb->mnt_cifs_flags & | |
1779 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1780 | if (rc == 0) { | |
1781 | unsigned int bytes_written; | |
1782 | rc = CIFSSMBWrite(xid, pTcon, netfid, 0, | |
1783 | attrs->ia_size, | |
1784 | &bytes_written, NULL, | |
1785 | NULL, 1); | |
b6b38f70 | 1786 | cFYI(1, "wrt seteof rc %d", rc); |
8efdbde6 JL |
1787 | CIFSSMBClose(xid, pTcon, netfid); |
1788 | } | |
1789 | } | |
1790 | } | |
1791 | ||
1792 | if (rc == 0) { | |
fbec9ab9 | 1793 | cifsInode->server_eof = attrs->ia_size; |
1b947463 | 1794 | cifs_setsize(inode, attrs->ia_size); |
8efdbde6 JL |
1795 | cifs_truncate_page(inode->i_mapping, inode->i_size); |
1796 | } | |
1797 | ||
1798 | return rc; | |
1799 | } | |
1800 | ||
3fe5c1dd JL |
1801 | static int |
1802 | cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs) | |
1803 | { | |
1804 | int rc; | |
1805 | int xid; | |
1806 | char *full_path = NULL; | |
1807 | struct inode *inode = direntry->d_inode; | |
1808 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); | |
1809 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
ba00ba64 | 1810 | struct cifsTconInfo *pTcon; |
3fe5c1dd | 1811 | struct cifs_unix_set_info_args *args = NULL; |
3bbeeb3c | 1812 | struct cifsFileInfo *open_file; |
3fe5c1dd | 1813 | |
b6b38f70 JP |
1814 | cFYI(1, "setattr_unix on file %s attrs->ia_valid=0x%x", |
1815 | direntry->d_name.name, attrs->ia_valid); | |
3fe5c1dd JL |
1816 | |
1817 | xid = GetXid(); | |
1818 | ||
db78b877 CH |
1819 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) |
1820 | attrs->ia_valid |= ATTR_FORCE; | |
1821 | ||
1822 | rc = inode_change_ok(inode, attrs); | |
1823 | if (rc < 0) | |
1824 | goto out; | |
3fe5c1dd JL |
1825 | |
1826 | full_path = build_path_from_dentry(direntry); | |
1827 | if (full_path == NULL) { | |
1828 | rc = -ENOMEM; | |
1829 | goto out; | |
1830 | } | |
1831 | ||
0f4d634c JL |
1832 | /* |
1833 | * Attempt to flush data before changing attributes. We need to do | |
1834 | * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the | |
1835 | * ownership or mode then we may also need to do this. Here, we take | |
1836 | * the safe way out and just do the flush on all setattr requests. If | |
1837 | * the flush returns error, store it to report later and continue. | |
1838 | * | |
1839 | * BB: This should be smarter. Why bother flushing pages that | |
1840 | * will be truncated anyway? Also, should we error out here if | |
1841 | * the flush returns error? | |
1842 | */ | |
1843 | rc = filemap_write_and_wait(inode->i_mapping); | |
1844 | if (rc != 0) { | |
1845 | cifsInode->write_behind_rc = rc; | |
1846 | rc = 0; | |
3fe5c1dd JL |
1847 | } |
1848 | ||
1849 | if (attrs->ia_valid & ATTR_SIZE) { | |
1850 | rc = cifs_set_file_size(inode, attrs, xid, full_path); | |
1851 | if (rc != 0) | |
1852 | goto out; | |
1853 | } | |
1854 | ||
1855 | /* skip mode change if it's just for clearing setuid/setgid */ | |
1856 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) | |
1857 | attrs->ia_valid &= ~ATTR_MODE; | |
1858 | ||
1859 | args = kmalloc(sizeof(*args), GFP_KERNEL); | |
1860 | if (args == NULL) { | |
1861 | rc = -ENOMEM; | |
1862 | goto out; | |
1863 | } | |
1864 | ||
1865 | /* set up the struct */ | |
1866 | if (attrs->ia_valid & ATTR_MODE) | |
1867 | args->mode = attrs->ia_mode; | |
1868 | else | |
1869 | args->mode = NO_CHANGE_64; | |
1870 | ||
1871 | if (attrs->ia_valid & ATTR_UID) | |
1872 | args->uid = attrs->ia_uid; | |
1873 | else | |
1874 | args->uid = NO_CHANGE_64; | |
1875 | ||
1876 | if (attrs->ia_valid & ATTR_GID) | |
1877 | args->gid = attrs->ia_gid; | |
1878 | else | |
1879 | args->gid = NO_CHANGE_64; | |
1880 | ||
1881 | if (attrs->ia_valid & ATTR_ATIME) | |
1882 | args->atime = cifs_UnixTimeToNT(attrs->ia_atime); | |
1883 | else | |
1884 | args->atime = NO_CHANGE_64; | |
1885 | ||
1886 | if (attrs->ia_valid & ATTR_MTIME) | |
1887 | args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime); | |
1888 | else | |
1889 | args->mtime = NO_CHANGE_64; | |
1890 | ||
1891 | if (attrs->ia_valid & ATTR_CTIME) | |
1892 | args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime); | |
1893 | else | |
1894 | args->ctime = NO_CHANGE_64; | |
1895 | ||
1896 | args->device = 0; | |
3bbeeb3c JL |
1897 | open_file = find_writable_file(cifsInode); |
1898 | if (open_file) { | |
1899 | u16 nfid = open_file->netfid; | |
1900 | u32 npid = open_file->pid; | |
ba00ba64 | 1901 | pTcon = open_file->tcon; |
3bbeeb3c | 1902 | rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid); |
6ab409b5 | 1903 | cifsFileInfo_put(open_file); |
3bbeeb3c | 1904 | } else { |
a6e8a845 | 1905 | pTcon = cifs_sb_tcon(cifs_sb); |
3bbeeb3c | 1906 | rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args, |
01ea95e3 JL |
1907 | cifs_sb->local_nls, |
1908 | cifs_sb->mnt_cifs_flags & | |
1909 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
3bbeeb3c | 1910 | } |
3fe5c1dd | 1911 | |
1025774c CH |
1912 | if (rc) |
1913 | goto out; | |
ccd4bb1b | 1914 | |
1025774c | 1915 | if ((attrs->ia_valid & ATTR_SIZE) && |
1b947463 CH |
1916 | attrs->ia_size != i_size_read(inode)) |
1917 | truncate_setsize(inode, attrs->ia_size); | |
1025774c CH |
1918 | |
1919 | setattr_copy(inode, attrs); | |
1920 | mark_inode_dirty(inode); | |
1921 | ||
1922 | /* force revalidate when any of these times are set since some | |
1923 | of the fs types (eg ext3, fat) do not have fine enough | |
1924 | time granularity to match protocol, and we do not have a | |
1925 | a way (yet) to query the server fs's time granularity (and | |
1926 | whether it rounds times down). | |
1927 | */ | |
1928 | if (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME)) | |
1929 | cifsInode->time = 0; | |
3fe5c1dd JL |
1930 | out: |
1931 | kfree(args); | |
1932 | kfree(full_path); | |
1933 | FreeXid(xid); | |
1934 | return rc; | |
1935 | } | |
1936 | ||
0510eeb7 JL |
1937 | static int |
1938 | cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs) | |
1da177e4 LT |
1939 | { |
1940 | int xid; | |
3fe5c1dd JL |
1941 | struct inode *inode = direntry->d_inode; |
1942 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
3fe5c1dd | 1943 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
1da177e4 LT |
1944 | char *full_path = NULL; |
1945 | int rc = -EACCES; | |
feb3e20c | 1946 | __u32 dosattr = 0; |
4e1e7fb9 | 1947 | __u64 mode = NO_CHANGE_64; |
3fe5c1dd | 1948 | |
1da177e4 LT |
1949 | xid = GetXid(); |
1950 | ||
b6b38f70 JP |
1951 | cFYI(1, "setattr on file %s attrs->iavalid 0x%x", |
1952 | direntry->d_name.name, attrs->ia_valid); | |
6473a559 | 1953 | |
db78b877 CH |
1954 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) |
1955 | attrs->ia_valid |= ATTR_FORCE; | |
1956 | ||
1957 | rc = inode_change_ok(inode, attrs); | |
1958 | if (rc < 0) { | |
1959 | FreeXid(xid); | |
1960 | return rc; | |
6473a559 | 1961 | } |
50c2f753 | 1962 | |
7f57356b | 1963 | full_path = build_path_from_dentry(direntry); |
1da177e4 | 1964 | if (full_path == NULL) { |
0f3bc09e | 1965 | rc = -ENOMEM; |
1da177e4 | 1966 | FreeXid(xid); |
0f3bc09e | 1967 | return rc; |
1da177e4 | 1968 | } |
1da177e4 | 1969 | |
0f4d634c JL |
1970 | /* |
1971 | * Attempt to flush data before changing attributes. We need to do | |
1972 | * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the | |
1973 | * ownership or mode then we may also need to do this. Here, we take | |
1974 | * the safe way out and just do the flush on all setattr requests. If | |
1975 | * the flush returns error, store it to report later and continue. | |
1976 | * | |
1977 | * BB: This should be smarter. Why bother flushing pages that | |
1978 | * will be truncated anyway? Also, should we error out here if | |
1979 | * the flush returns error? | |
1980 | */ | |
1981 | rc = filemap_write_and_wait(inode->i_mapping); | |
1982 | if (rc != 0) { | |
1983 | cifsInode->write_behind_rc = rc; | |
1984 | rc = 0; | |
50531444 | 1985 | } |
cea21805 | 1986 | |
50531444 | 1987 | if (attrs->ia_valid & ATTR_SIZE) { |
8efdbde6 JL |
1988 | rc = cifs_set_file_size(inode, attrs, xid, full_path); |
1989 | if (rc != 0) | |
e30dcf3a | 1990 | goto cifs_setattr_exit; |
1da177e4 | 1991 | } |
4ca691a8 JL |
1992 | |
1993 | /* | |
1994 | * Without unix extensions we can't send ownership changes to the | |
1995 | * server, so silently ignore them. This is consistent with how | |
1996 | * local DOS/Windows filesystems behave (VFAT, NTFS, etc). With | |
1997 | * CIFSACL support + proper Windows to Unix idmapping, we may be | |
1998 | * able to support this in the future. | |
1999 | */ | |
3fe5c1dd | 2000 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) |
4ca691a8 | 2001 | attrs->ia_valid &= ~(ATTR_UID | ATTR_GID); |
1da177e4 | 2002 | |
d32c4f26 JL |
2003 | /* skip mode change if it's just for clearing setuid/setgid */ |
2004 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) | |
2005 | attrs->ia_valid &= ~ATTR_MODE; | |
2006 | ||
1da177e4 | 2007 | if (attrs->ia_valid & ATTR_MODE) { |
b6b38f70 | 2008 | cFYI(1, "Mode changed to 0%o", attrs->ia_mode); |
1da177e4 | 2009 | mode = attrs->ia_mode; |
1da177e4 LT |
2010 | } |
2011 | ||
3fe5c1dd | 2012 | if (attrs->ia_valid & ATTR_MODE) { |
cdbce9c8 | 2013 | rc = 0; |
97837582 SF |
2014 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
2015 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) | |
02eadeff | 2016 | rc = mode_to_acl(inode, full_path, mode); |
5132861a | 2017 | else |
97837582 | 2018 | #endif |
5132861a JL |
2019 | if (((mode & S_IWUGO) == 0) && |
2020 | (cifsInode->cifsAttrs & ATTR_READONLY) == 0) { | |
feb3e20c JL |
2021 | |
2022 | dosattr = cifsInode->cifsAttrs | ATTR_READONLY; | |
2023 | ||
5132861a JL |
2024 | /* fix up mode if we're not using dynperm */ |
2025 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0) | |
2026 | attrs->ia_mode = inode->i_mode & ~S_IWUGO; | |
2027 | } else if ((mode & S_IWUGO) && | |
2028 | (cifsInode->cifsAttrs & ATTR_READONLY)) { | |
feb3e20c JL |
2029 | |
2030 | dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY; | |
2031 | /* Attributes of 0 are ignored */ | |
2032 | if (dosattr == 0) | |
2033 | dosattr |= ATTR_NORMAL; | |
5132861a JL |
2034 | |
2035 | /* reset local inode permissions to normal */ | |
2036 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { | |
2037 | attrs->ia_mode &= ~(S_IALLUGO); | |
2038 | if (S_ISDIR(inode->i_mode)) | |
2039 | attrs->ia_mode |= | |
2040 | cifs_sb->mnt_dir_mode; | |
2041 | else | |
2042 | attrs->ia_mode |= | |
2043 | cifs_sb->mnt_file_mode; | |
2044 | } | |
2045 | } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { | |
2046 | /* ignore mode change - ATTR_READONLY hasn't changed */ | |
2047 | attrs->ia_valid &= ~ATTR_MODE; | |
1da177e4 | 2048 | } |
1da177e4 LT |
2049 | } |
2050 | ||
feb3e20c JL |
2051 | if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) || |
2052 | ((attrs->ia_valid & ATTR_MODE) && dosattr)) { | |
2053 | rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); | |
2054 | /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */ | |
1da177e4 | 2055 | |
e30dcf3a SF |
2056 | /* Even if error on time set, no sense failing the call if |
2057 | the server would set the time to a reasonable value anyway, | |
2058 | and this check ensures that we are not being called from | |
2059 | sys_utimes in which case we ought to fail the call back to | |
2060 | the user when the server rejects the call */ | |
fb8c4b14 | 2061 | if ((rc) && (attrs->ia_valid & |
feb3e20c | 2062 | (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE))) |
e30dcf3a | 2063 | rc = 0; |
1da177e4 LT |
2064 | } |
2065 | ||
2066 | /* do not need local check to inode_check_ok since the server does | |
2067 | that */ | |
1025774c CH |
2068 | if (rc) |
2069 | goto cifs_setattr_exit; | |
2070 | ||
2071 | if ((attrs->ia_valid & ATTR_SIZE) && | |
1b947463 CH |
2072 | attrs->ia_size != i_size_read(inode)) |
2073 | truncate_setsize(inode, attrs->ia_size); | |
1025774c CH |
2074 | |
2075 | setattr_copy(inode, attrs); | |
2076 | mark_inode_dirty(inode); | |
2077 | return 0; | |
2078 | ||
e30dcf3a | 2079 | cifs_setattr_exit: |
1da177e4 LT |
2080 | kfree(full_path); |
2081 | FreeXid(xid); | |
2082 | return rc; | |
2083 | } | |
2084 | ||
0510eeb7 JL |
2085 | int |
2086 | cifs_setattr(struct dentry *direntry, struct iattr *attrs) | |
2087 | { | |
2088 | struct inode *inode = direntry->d_inode; | |
2089 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
a6e8a845 | 2090 | struct cifsTconInfo *pTcon = cifs_sb_tcon(cifs_sb); |
0510eeb7 JL |
2091 | |
2092 | if (pTcon->unix_ext) | |
2093 | return cifs_setattr_unix(direntry, attrs); | |
2094 | ||
2095 | return cifs_setattr_nounix(direntry, attrs); | |
2096 | ||
2097 | /* BB: add cifs_setattr_legacy for really old servers */ | |
2098 | } | |
2099 | ||
99ee4dbd | 2100 | #if 0 |
1da177e4 LT |
2101 | void cifs_delete_inode(struct inode *inode) |
2102 | { | |
b6b38f70 | 2103 | cFYI(1, "In cifs_delete_inode, inode = 0x%p", inode); |
1da177e4 LT |
2104 | /* may have to add back in if and when safe distributed caching of |
2105 | directories added e.g. via FindNotify */ | |
2106 | } | |
99ee4dbd | 2107 | #endif |