Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/cifs/inode.c | |
3 | * | |
2dd29d31 | 4 | * Copyright (C) International Business Machines Corp., 2002,2007 |
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 LT |
22 | #include <linux/stat.h> |
23 | #include <linux/pagemap.h> | |
24 | #include <asm/div64.h> | |
25 | #include "cifsfs.h" | |
26 | #include "cifspdu.h" | |
27 | #include "cifsglob.h" | |
28 | #include "cifsproto.h" | |
29 | #include "cifs_debug.h" | |
30 | #include "cifs_fs_sb.h" | |
31 | ||
70eff55d | 32 | |
7962670e | 33 | static void cifs_set_ops(struct inode *inode, const bool is_dfs_referral) |
70eff55d CH |
34 | { |
35 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
36 | ||
37 | switch (inode->i_mode & S_IFMT) { | |
38 | case S_IFREG: | |
39 | inode->i_op = &cifs_file_inode_ops; | |
40 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { | |
41 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
42 | inode->i_fop = &cifs_file_direct_nobrl_ops; | |
43 | else | |
44 | inode->i_fop = &cifs_file_direct_ops; | |
45 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
46 | inode->i_fop = &cifs_file_nobrl_ops; | |
47 | else { /* not direct, send byte range locks */ | |
48 | inode->i_fop = &cifs_file_ops; | |
49 | } | |
50 | ||
51 | ||
52 | /* check if server can support readpages */ | |
53 | if (cifs_sb->tcon->ses->server->maxBuf < | |
54 | PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE) | |
55 | inode->i_data.a_ops = &cifs_addr_ops_smallbuf; | |
56 | else | |
57 | inode->i_data.a_ops = &cifs_addr_ops; | |
58 | break; | |
59 | case S_IFDIR: | |
bc5b6e24 | 60 | #ifdef CONFIG_CIFS_DFS_UPCALL |
7962670e IM |
61 | if (is_dfs_referral) { |
62 | inode->i_op = &cifs_dfs_referral_inode_operations; | |
63 | } else { | |
bc5b6e24 SF |
64 | #else /* NO DFS support, treat as a directory */ |
65 | { | |
66 | #endif | |
7962670e IM |
67 | inode->i_op = &cifs_dir_inode_ops; |
68 | inode->i_fop = &cifs_dir_ops; | |
69 | } | |
70eff55d CH |
70 | break; |
71 | case S_IFLNK: | |
72 | inode->i_op = &cifs_symlink_inode_ops; | |
73 | break; | |
74 | default: | |
75 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
76 | break; | |
77 | } | |
78 | } | |
79 | ||
75f12983 CH |
80 | static void cifs_unix_info_to_inode(struct inode *inode, |
81 | FILE_UNIX_BASIC_INFO *info, int force_uid_gid) | |
82 | { | |
83 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
84 | struct cifsInodeInfo *cifsInfo = CIFS_I(inode); | |
85 | __u64 num_of_bytes = le64_to_cpu(info->NumOfBytes); | |
86 | __u64 end_of_file = le64_to_cpu(info->EndOfFile); | |
87 | ||
88 | inode->i_atime = cifs_NTtimeToUnix(le64_to_cpu(info->LastAccessTime)); | |
89 | inode->i_mtime = | |
90 | cifs_NTtimeToUnix(le64_to_cpu(info->LastModificationTime)); | |
91 | inode->i_ctime = cifs_NTtimeToUnix(le64_to_cpu(info->LastStatusChange)); | |
92 | inode->i_mode = le64_to_cpu(info->Permissions); | |
93 | ||
94 | /* | |
95 | * Since we set the inode type below we need to mask off | |
96 | * to avoid strange results if bits set above. | |
97 | */ | |
98 | inode->i_mode &= ~S_IFMT; | |
99 | switch (le32_to_cpu(info->Type)) { | |
100 | case UNIX_FILE: | |
101 | inode->i_mode |= S_IFREG; | |
102 | break; | |
103 | case UNIX_SYMLINK: | |
104 | inode->i_mode |= S_IFLNK; | |
105 | break; | |
106 | case UNIX_DIR: | |
107 | inode->i_mode |= S_IFDIR; | |
108 | break; | |
109 | case UNIX_CHARDEV: | |
110 | inode->i_mode |= S_IFCHR; | |
111 | inode->i_rdev = MKDEV(le64_to_cpu(info->DevMajor), | |
112 | le64_to_cpu(info->DevMinor) & MINORMASK); | |
113 | break; | |
114 | case UNIX_BLOCKDEV: | |
115 | inode->i_mode |= S_IFBLK; | |
116 | inode->i_rdev = MKDEV(le64_to_cpu(info->DevMajor), | |
117 | le64_to_cpu(info->DevMinor) & MINORMASK); | |
118 | break; | |
119 | case UNIX_FIFO: | |
120 | inode->i_mode |= S_IFIFO; | |
121 | break; | |
122 | case UNIX_SOCKET: | |
123 | inode->i_mode |= S_IFSOCK; | |
124 | break; | |
125 | default: | |
126 | /* safest to call it a file if we do not know */ | |
127 | inode->i_mode |= S_IFREG; | |
128 | cFYI(1, ("unknown type %d", le32_to_cpu(info->Type))); | |
129 | break; | |
130 | } | |
131 | ||
132 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) && | |
133 | !force_uid_gid) | |
134 | inode->i_uid = cifs_sb->mnt_uid; | |
135 | else | |
136 | inode->i_uid = le64_to_cpu(info->Uid); | |
137 | ||
138 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) && | |
139 | !force_uid_gid) | |
140 | inode->i_gid = cifs_sb->mnt_gid; | |
141 | else | |
142 | inode->i_gid = le64_to_cpu(info->Gid); | |
143 | ||
144 | inode->i_nlink = le64_to_cpu(info->Nlinks); | |
145 | ||
146 | spin_lock(&inode->i_lock); | |
147 | if (is_size_safe_to_change(cifsInfo, end_of_file)) { | |
148 | /* | |
149 | * We can not safely change the file size here if the client | |
150 | * is writing to it due to potential races. | |
151 | */ | |
152 | i_size_write(inode, end_of_file); | |
153 | ||
154 | /* | |
155 | * i_blocks is not related to (i_size / i_blksize), | |
156 | * but instead 512 byte (2**9) size is required for | |
157 | * calculating num blocks. | |
158 | */ | |
159 | inode->i_blocks = (512 - 1 + num_of_bytes) >> 9; | |
160 | } | |
161 | spin_unlock(&inode->i_lock); | |
162 | } | |
163 | ||
b9a3260f SF |
164 | |
165 | /* | |
166 | * Needed to setup inode data for the directory which is the | |
167 | * junction to the new submount (ie to setup the fake directory | |
168 | * which represents a DFS referral) | |
169 | */ | |
0e4bbde9 SF |
170 | static void fill_fake_finddataunix(FILE_UNIX_BASIC_INFO *pfnd_dat, |
171 | struct super_block *sb) | |
172 | { | |
173 | struct inode *pinode = NULL; | |
174 | ||
0a891adc | 175 | memset(pfnd_dat, 0, sizeof(FILE_UNIX_BASIC_INFO)); |
0e4bbde9 SF |
176 | |
177 | /* __le64 pfnd_dat->EndOfFile = cpu_to_le64(0); | |
178 | __le64 pfnd_dat->NumOfBytes = cpu_to_le64(0); | |
179 | __u64 UniqueId = 0; */ | |
180 | pfnd_dat->LastStatusChange = | |
181 | cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); | |
182 | pfnd_dat->LastAccessTime = | |
183 | cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); | |
184 | pfnd_dat->LastModificationTime = | |
185 | cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); | |
186 | pfnd_dat->Type = cpu_to_le32(UNIX_DIR); | |
187 | pfnd_dat->Permissions = cpu_to_le64(S_IXUGO | S_IRWXU); | |
188 | pfnd_dat->Nlinks = cpu_to_le64(2); | |
189 | if (sb->s_root) | |
190 | pinode = sb->s_root->d_inode; | |
191 | if (pinode == NULL) | |
192 | return; | |
193 | ||
194 | /* fill in default values for the remaining based on root | |
195 | inode since we can not query the server for this inode info */ | |
196 | pfnd_dat->DevMajor = cpu_to_le64(MAJOR(pinode->i_rdev)); | |
197 | pfnd_dat->DevMinor = cpu_to_le64(MINOR(pinode->i_rdev)); | |
198 | pfnd_dat->Uid = cpu_to_le64(pinode->i_uid); | |
199 | pfnd_dat->Gid = cpu_to_le64(pinode->i_gid); | |
200 | } | |
201 | ||
1da177e4 | 202 | int cifs_get_inode_info_unix(struct inode **pinode, |
646dd539 | 203 | const unsigned char *full_path, struct super_block *sb, int xid) |
1da177e4 LT |
204 | { |
205 | int rc = 0; | |
0e4bbde9 | 206 | FILE_UNIX_BASIC_INFO find_data; |
1da177e4 LT |
207 | struct cifsTconInfo *pTcon; |
208 | struct inode *inode; | |
209 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
7962670e | 210 | bool is_dfs_referral = false; |
0e4bbde9 SF |
211 | struct cifsInodeInfo *cifsInfo; |
212 | __u64 num_of_bytes; | |
213 | __u64 end_of_file; | |
1da177e4 LT |
214 | |
215 | pTcon = cifs_sb->tcon; | |
646dd539 | 216 | cFYI(1, ("Getting info on %s", full_path)); |
7962670e | 217 | |
1da177e4 | 218 | /* could have done a find first instead but this returns more info */ |
0e4bbde9 | 219 | rc = CIFSSMBUnixQPathInfo(xid, pTcon, full_path, &find_data, |
737b758c SF |
220 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
221 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
e911d0cc JL |
222 | if (rc == -EREMOTE && !is_dfs_referral) { |
223 | is_dfs_referral = true; | |
224 | cFYI(DBG2, ("DFS ref")); | |
225 | /* for DFS, server does not give us real inode data */ | |
226 | fill_fake_finddataunix(&find_data, sb); | |
227 | rc = 0; | |
228 | } else if (rc) | |
229 | goto cgiiu_exit; | |
230 | ||
0e4bbde9 SF |
231 | num_of_bytes = le64_to_cpu(find_data.NumOfBytes); |
232 | end_of_file = le64_to_cpu(find_data.EndOfFile); | |
1da177e4 | 233 | |
0e4bbde9 SF |
234 | /* get new inode */ |
235 | if (*pinode == NULL) { | |
236 | *pinode = new_inode(sb); | |
1da177e4 | 237 | if (*pinode == NULL) { |
0e4bbde9 | 238 | rc = -ENOMEM; |
e911d0cc | 239 | goto cgiiu_exit; |
1da177e4 | 240 | } |
0e4bbde9 SF |
241 | /* Is an i_ino of zero legal? */ |
242 | /* note ino incremented to unique num in new_inode */ | |
243 | /* Are there sanity checks we can use to ensure that | |
244 | the server is really filling in that field? */ | |
245 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
246 | (*pinode)->i_ino = (unsigned long)find_data.UniqueId; | |
1da177e4 | 247 | |
0e4bbde9 SF |
248 | if (sb->s_flags & MS_NOATIME) |
249 | (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME; | |
1da177e4 | 250 | |
0e4bbde9 SF |
251 | insert_inode_hash(*pinode); |
252 | } | |
1da177e4 | 253 | |
0e4bbde9 SF |
254 | inode = *pinode; |
255 | cifsInfo = CIFS_I(inode); | |
1da177e4 | 256 | |
0e4bbde9 SF |
257 | cFYI(1, ("Old time %ld", cifsInfo->time)); |
258 | cifsInfo->time = jiffies; | |
259 | cFYI(1, ("New time %ld", cifsInfo->time)); | |
260 | /* this is ok to set on every inode revalidate */ | |
261 | atomic_set(&cifsInfo->inUse, 1); | |
1da177e4 | 262 | |
0e4bbde9 | 263 | cifs_unix_info_to_inode(inode, &find_data, 0); |
70eff55d | 264 | |
0e4bbde9 SF |
265 | if (num_of_bytes < end_of_file) |
266 | cFYI(1, ("allocation size less than end of file")); | |
267 | cFYI(1, ("Size %ld and blocks %llu", | |
268 | (unsigned long) inode->i_size, | |
269 | (unsigned long long)inode->i_blocks)); | |
270 | ||
271 | cifs_set_ops(inode, is_dfs_referral); | |
7962670e | 272 | cgiiu_exit: |
1da177e4 LT |
273 | return rc; |
274 | } | |
275 | ||
fb8c4b14 | 276 | static int decode_sfu_inode(struct inode *inode, __u64 size, |
d6e2f2a4 SF |
277 | const unsigned char *path, |
278 | struct cifs_sb_info *cifs_sb, int xid) | |
279 | { | |
280 | int rc; | |
4b18f2a9 | 281 | int oplock = 0; |
d6e2f2a4 SF |
282 | __u16 netfid; |
283 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
86c96b4b | 284 | char buf[24]; |
d6e2f2a4 | 285 | unsigned int bytes_read; |
fb8c4b14 | 286 | char *pbuf; |
d6e2f2a4 SF |
287 | |
288 | pbuf = buf; | |
289 | ||
4523cc30 | 290 | if (size == 0) { |
d6e2f2a4 SF |
291 | inode->i_mode |= S_IFIFO; |
292 | return 0; | |
293 | } else if (size < 8) { | |
294 | return -EINVAL; /* EOPNOTSUPP? */ | |
295 | } | |
50c2f753 | 296 | |
d6e2f2a4 SF |
297 | rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ, |
298 | CREATE_NOT_DIR, &netfid, &oplock, NULL, | |
299 | cifs_sb->local_nls, | |
300 | cifs_sb->mnt_cifs_flags & | |
301 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
fb8c4b14 | 302 | if (rc == 0) { |
ec637e3f | 303 | int buf_type = CIFS_NO_BUFFER; |
d6e2f2a4 SF |
304 | /* Read header */ |
305 | rc = CIFSSMBRead(xid, pTcon, | |
fb8c4b14 | 306 | netfid, |
86c96b4b | 307 | 24 /* length */, 0 /* offset */, |
ec637e3f | 308 | &bytes_read, &pbuf, &buf_type); |
4523cc30 SF |
309 | if ((rc == 0) && (bytes_read >= 8)) { |
310 | if (memcmp("IntxBLK", pbuf, 8) == 0) { | |
fb8c4b14 | 311 | cFYI(1, ("Block device")); |
3020a1f5 | 312 | inode->i_mode |= S_IFBLK; |
4523cc30 | 313 | if (bytes_read == 24) { |
86c96b4b SF |
314 | /* we have enough to decode dev num */ |
315 | __u64 mjr; /* major */ | |
316 | __u64 mnr; /* minor */ | |
317 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); | |
318 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); | |
319 | inode->i_rdev = MKDEV(mjr, mnr); | |
320 | } | |
4523cc30 | 321 | } else if (memcmp("IntxCHR", pbuf, 8) == 0) { |
fb8c4b14 | 322 | cFYI(1, ("Char device")); |
3020a1f5 | 323 | inode->i_mode |= S_IFCHR; |
4523cc30 | 324 | if (bytes_read == 24) { |
86c96b4b SF |
325 | /* we have enough to decode dev num */ |
326 | __u64 mjr; /* major */ | |
327 | __u64 mnr; /* minor */ | |
328 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); | |
329 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); | |
330 | inode->i_rdev = MKDEV(mjr, mnr); | |
fb8c4b14 | 331 | } |
4523cc30 | 332 | } else if (memcmp("IntxLNK", pbuf, 7) == 0) { |
fb8c4b14 | 333 | cFYI(1, ("Symlink")); |
3020a1f5 | 334 | inode->i_mode |= S_IFLNK; |
86c96b4b SF |
335 | } else { |
336 | inode->i_mode |= S_IFREG; /* file? */ | |
fb8c4b14 | 337 | rc = -EOPNOTSUPP; |
86c96b4b | 338 | } |
3020a1f5 SF |
339 | } else { |
340 | inode->i_mode |= S_IFREG; /* then it is a file */ | |
fb8c4b14 SF |
341 | rc = -EOPNOTSUPP; /* or some unknown SFU type */ |
342 | } | |
d6e2f2a4 | 343 | CIFSSMBClose(xid, pTcon, netfid); |
d6e2f2a4 SF |
344 | } |
345 | return rc; | |
d6e2f2a4 SF |
346 | } |
347 | ||
9e294f1c SF |
348 | #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */ |
349 | ||
953f8681 | 350 | static int get_sfu_mode(struct inode *inode, |
9e294f1c SF |
351 | const unsigned char *path, |
352 | struct cifs_sb_info *cifs_sb, int xid) | |
353 | { | |
3020a1f5 | 354 | #ifdef CONFIG_CIFS_XATTR |
9e294f1c SF |
355 | ssize_t rc; |
356 | char ea_value[4]; | |
357 | __u32 mode; | |
358 | ||
359 | rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS", | |
360 | ea_value, 4 /* size of buf */, cifs_sb->local_nls, | |
fb8c4b14 | 361 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
4523cc30 | 362 | if (rc < 0) |
9e294f1c SF |
363 | return (int)rc; |
364 | else if (rc > 3) { | |
365 | mode = le32_to_cpu(*((__le32 *)ea_value)); | |
fb8c4b14 SF |
366 | inode->i_mode &= ~SFBITS_MASK; |
367 | cFYI(1, ("special bits 0%o org mode 0%o", mode, inode->i_mode)); | |
9e294f1c | 368 | inode->i_mode = (mode & SFBITS_MASK) | inode->i_mode; |
fb8c4b14 | 369 | cFYI(1, ("special mode bits 0%o", mode)); |
9e294f1c SF |
370 | return 0; |
371 | } else { | |
372 | return 0; | |
373 | } | |
3020a1f5 SF |
374 | #else |
375 | return -EOPNOTSUPP; | |
376 | #endif | |
9e294f1c SF |
377 | } |
378 | ||
b9a3260f SF |
379 | /* |
380 | * Needed to setup inode data for the directory which is the | |
381 | * junction to the new submount (ie to setup the fake directory | |
382 | * which represents a DFS referral) | |
383 | */ | |
384 | static void fill_fake_finddata(FILE_ALL_INFO *pfnd_dat, | |
385 | struct super_block *sb) | |
386 | { | |
0a891adc | 387 | memset(pfnd_dat, 0, sizeof(FILE_ALL_INFO)); |
b9a3260f SF |
388 | |
389 | /* __le64 pfnd_dat->AllocationSize = cpu_to_le64(0); | |
390 | __le64 pfnd_dat->EndOfFile = cpu_to_le64(0); | |
391 | __u8 pfnd_dat->DeletePending = 0; | |
392 | __u8 pfnd_data->Directory = 0; | |
393 | __le32 pfnd_dat->EASize = 0; | |
394 | __u64 pfnd_dat->IndexNumber = 0; | |
395 | __u64 pfnd_dat->IndexNumber1 = 0; */ | |
396 | pfnd_dat->CreationTime = | |
397 | cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); | |
398 | pfnd_dat->LastAccessTime = | |
399 | cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); | |
400 | pfnd_dat->LastWriteTime = | |
401 | cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); | |
402 | pfnd_dat->ChangeTime = | |
403 | cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); | |
404 | pfnd_dat->Attributes = cpu_to_le32(ATTR_DIRECTORY); | |
405 | pfnd_dat->NumberOfLinks = cpu_to_le32(2); | |
406 | } | |
407 | ||
1da177e4 | 408 | int cifs_get_inode_info(struct inode **pinode, |
646dd539 | 409 | const unsigned char *full_path, FILE_ALL_INFO *pfindData, |
8b1327f6 | 410 | struct super_block *sb, int xid, const __u16 *pfid) |
1da177e4 LT |
411 | { |
412 | int rc = 0; | |
b9a3260f SF |
413 | __u32 attr; |
414 | struct cifsInodeInfo *cifsInfo; | |
1da177e4 LT |
415 | struct cifsTconInfo *pTcon; |
416 | struct inode *inode; | |
417 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
1da177e4 | 418 | char *buf = NULL; |
5ade9dea | 419 | bool adjustTZ = false; |
7962670e | 420 | bool is_dfs_referral = false; |
4468eb3f | 421 | umode_t default_mode; |
1da177e4 LT |
422 | |
423 | pTcon = cifs_sb->tcon; | |
646dd539 | 424 | cFYI(1, ("Getting info on %s", full_path)); |
1da177e4 | 425 | |
d0d2f2df SF |
426 | if ((pfindData == NULL) && (*pinode != NULL)) { |
427 | if (CIFS_I(*pinode)->clientCanCacheRead) { | |
fb8c4b14 | 428 | cFYI(1, ("No need to revalidate cached inode sizes")); |
1da177e4 LT |
429 | return rc; |
430 | } | |
431 | } | |
432 | ||
433 | /* if file info not passed in then get it from server */ | |
d0d2f2df | 434 | if (pfindData == NULL) { |
1da177e4 | 435 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
d0d2f2df | 436 | if (buf == NULL) |
1da177e4 LT |
437 | return -ENOMEM; |
438 | pfindData = (FILE_ALL_INFO *)buf; | |
7962670e | 439 | |
1da177e4 | 440 | /* could do find first instead but this returns more info */ |
7962670e | 441 | rc = CIFSSMBQPathInfo(xid, pTcon, full_path, pfindData, |
acf1a1b1 | 442 | 0 /* not legacy */, |
6b8edfe0 | 443 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
737b758c | 444 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
6b8edfe0 SF |
445 | /* BB optimize code so we do not make the above call |
446 | when server claims no NT SMB support and the above call | |
447 | failed at least once - set flag in tcon or mount */ | |
4523cc30 | 448 | if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) { |
7962670e | 449 | rc = SMBQueryInformation(xid, pTcon, full_path, |
fb8c4b14 | 450 | pfindData, cifs_sb->local_nls, |
6b8edfe0 SF |
451 | cifs_sb->mnt_cifs_flags & |
452 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
4b18f2a9 | 453 | adjustTZ = true; |
6b8edfe0 | 454 | } |
1da177e4 LT |
455 | } |
456 | /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */ | |
b9a3260f SF |
457 | if (rc == -EREMOTE) { |
458 | is_dfs_referral = true; | |
459 | fill_fake_finddata(pfindData, sb); | |
460 | rc = 0; | |
461 | } else if (rc) | |
7962670e | 462 | goto cgii_exit; |
1da177e4 | 463 | |
b9a3260f SF |
464 | attr = le32_to_cpu(pfindData->Attributes); |
465 | ||
466 | /* get new inode */ | |
467 | if (*pinode == NULL) { | |
468 | *pinode = new_inode(sb); | |
1da177e4 | 469 | if (*pinode == NULL) { |
b9a3260f SF |
470 | rc = -ENOMEM; |
471 | goto cgii_exit; | |
472 | } | |
473 | /* Is an i_ino of zero legal? Can we use that to check | |
474 | if the server supports returning inode numbers? Are | |
475 | there other sanity checks we can use to ensure that | |
476 | the server is really filling in that field? */ | |
477 | ||
478 | /* We can not use the IndexNumber field by default from | |
479 | Windows or Samba (in ALL_INFO buf) but we can request | |
480 | it explicitly. It may not be unique presumably if | |
481 | the server has multiple devices mounted under one share */ | |
482 | ||
483 | /* There may be higher info levels that work but are | |
484 | there Windows server or network appliances for which | |
485 | IndexNumber field is not guaranteed unique? */ | |
486 | ||
487 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { | |
488 | int rc1 = 0; | |
489 | __u64 inode_num; | |
490 | ||
491 | rc1 = CIFSGetSrvInodeNumber(xid, pTcon, | |
646dd539 | 492 | full_path, &inode_num, |
737b758c SF |
493 | cifs_sb->local_nls, |
494 | cifs_sb->mnt_cifs_flags & | |
495 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
b9a3260f SF |
496 | if (rc1) { |
497 | cFYI(1, ("GetSrvInodeNum rc %d", rc1)); | |
498 | /* BB EOPNOSUPP disable SERVER_INUM? */ | |
499 | } else /* do we need cast or hash to ino? */ | |
500 | (*pinode)->i_ino = inode_num; | |
501 | } /* else ino incremented to unique num in new_inode*/ | |
502 | if (sb->s_flags & MS_NOATIME) | |
503 | (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME; | |
504 | insert_inode_hash(*pinode); | |
505 | } | |
506 | inode = *pinode; | |
507 | cifsInfo = CIFS_I(inode); | |
508 | cifsInfo->cifsAttrs = attr; | |
509 | cFYI(1, ("Old time %ld", cifsInfo->time)); | |
510 | cifsInfo->time = jiffies; | |
511 | cFYI(1, ("New time %ld", cifsInfo->time)); | |
512 | ||
513 | /* blksize needs to be multiple of two. So safer to default to | |
514 | blksize and blkbits set in superblock so 2**blkbits and blksize | |
515 | will match rather than setting to: | |
516 | (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/ | |
517 | ||
518 | /* Linux can not store file creation time so ignore it */ | |
519 | if (pfindData->LastAccessTime) | |
520 | inode->i_atime = cifs_NTtimeToUnix | |
521 | (le64_to_cpu(pfindData->LastAccessTime)); | |
522 | else /* do not need to use current_fs_time - time not stored */ | |
523 | inode->i_atime = CURRENT_TIME; | |
524 | inode->i_mtime = | |
1da177e4 | 525 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime)); |
b9a3260f SF |
526 | inode->i_ctime = |
527 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime)); | |
528 | cFYI(DBG2, ("Attributes came in as 0x%x", attr)); | |
529 | if (adjustTZ && (pTcon->ses) && (pTcon->ses->server)) { | |
530 | inode->i_ctime.tv_sec += pTcon->ses->server->timeAdj; | |
531 | inode->i_mtime.tv_sec += pTcon->ses->server->timeAdj; | |
532 | } | |
1da177e4 | 533 | |
4468eb3f JL |
534 | /* get default inode mode */ |
535 | if (attr & ATTR_DIRECTORY) | |
536 | default_mode = cifs_sb->mnt_dir_mode; | |
537 | else | |
538 | default_mode = cifs_sb->mnt_file_mode; | |
539 | ||
540 | /* set permission bits */ | |
541 | if (atomic_read(&cifsInfo->inUse) == 0 || | |
542 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0) | |
543 | inode->i_mode = default_mode; | |
544 | else { | |
545 | /* just reenable write bits if !ATTR_READONLY */ | |
546 | if ((inode->i_mode & S_IWUGO) == 0 && | |
547 | (attr & ATTR_READONLY) == 0) | |
548 | inode->i_mode |= (S_IWUGO & default_mode); | |
aab3a8c7 IJ |
549 | |
550 | inode->i_mode &= ~S_IFMT; | |
4468eb3f JL |
551 | } |
552 | /* clear write bits if ATTR_READONLY is set */ | |
553 | if (attr & ATTR_READONLY) | |
554 | inode->i_mode &= ~S_IWUGO; | |
555 | ||
556 | /* set inode type */ | |
557 | if ((attr & ATTR_SYSTEM) && | |
558 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) { | |
559 | /* no need to fix endianness on 0 */ | |
560 | if (pfindData->EndOfFile == 0) | |
561 | inode->i_mode |= S_IFIFO; | |
562 | else if (decode_sfu_inode(inode, | |
563 | le64_to_cpu(pfindData->EndOfFile), | |
564 | full_path, cifs_sb, xid)) | |
565 | cFYI(1, ("unknown SFU file type\n")); | |
b9a3260f | 566 | } else { |
4468eb3f JL |
567 | if (attr & ATTR_DIRECTORY) |
568 | inode->i_mode |= S_IFDIR; | |
569 | else | |
570 | inode->i_mode |= S_IFREG; | |
b9a3260f SF |
571 | } |
572 | ||
573 | spin_lock(&inode->i_lock); | |
574 | if (is_size_safe_to_change(cifsInfo, | |
575 | le64_to_cpu(pfindData->EndOfFile))) { | |
576 | /* can not safely shrink the file size here if the | |
577 | client is writing to it due to potential races */ | |
578 | i_size_write(inode, le64_to_cpu(pfindData->EndOfFile)); | |
579 | ||
580 | /* 512 bytes (2**9) is the fake blocksize that must be | |
581 | used for this calculation */ | |
582 | inode->i_blocks = (512 - 1 + le64_to_cpu( | |
583 | pfindData->AllocationSize)) >> 9; | |
584 | } | |
585 | spin_unlock(&inode->i_lock); | |
1da177e4 | 586 | |
b9a3260f | 587 | inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks); |
1da177e4 | 588 | |
b9a3260f SF |
589 | /* BB fill in uid and gid here? with help from winbind? |
590 | or retrieve from NTFS stream extended attribute */ | |
4879b448 | 591 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
b9a3260f SF |
592 | /* fill in 0777 bits from ACL */ |
593 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { | |
594 | cFYI(1, ("Getting mode bits from ACL")); | |
595 | acl_to_uid_mode(inode, full_path, pfid); | |
596 | } | |
4879b448 | 597 | #endif |
b9a3260f SF |
598 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { |
599 | /* fill in remaining high mode bits e.g. SUID, VTX */ | |
600 | get_sfu_mode(inode, full_path, cifs_sb, xid); | |
601 | } else if (atomic_read(&cifsInfo->inUse) == 0) { | |
602 | inode->i_uid = cifs_sb->mnt_uid; | |
603 | inode->i_gid = cifs_sb->mnt_gid; | |
604 | /* set so we do not keep refreshing these fields with | |
605 | bad data after user has changed them in memory */ | |
606 | atomic_set(&cifsInfo->inUse, 1); | |
1da177e4 | 607 | } |
b9a3260f SF |
608 | |
609 | cifs_set_ops(inode, is_dfs_referral); | |
610 | ||
611 | ||
612 | ||
613 | ||
7962670e | 614 | cgii_exit: |
1da177e4 LT |
615 | kfree(buf); |
616 | return rc; | |
617 | } | |
618 | ||
7f8ed420 SF |
619 | static const struct inode_operations cifs_ipc_inode_ops = { |
620 | .lookup = cifs_lookup, | |
621 | }; | |
622 | ||
1da177e4 | 623 | /* gets root inode */ |
ce634ab2 | 624 | struct inode *cifs_iget(struct super_block *sb, unsigned long ino) |
1da177e4 | 625 | { |
ce634ab2 | 626 | int xid; |
1da177e4 | 627 | struct cifs_sb_info *cifs_sb; |
ce634ab2 DH |
628 | struct inode *inode; |
629 | long rc; | |
630 | ||
631 | inode = iget_locked(sb, ino); | |
632 | if (!inode) | |
633 | return ERR_PTR(-ENOMEM); | |
634 | if (!(inode->i_state & I_NEW)) | |
635 | return inode; | |
1da177e4 LT |
636 | |
637 | cifs_sb = CIFS_SB(inode->i_sb); | |
638 | xid = GetXid(); | |
c18c842b SF |
639 | |
640 | if (cifs_sb->tcon->unix_ext) | |
7f8ed420 | 641 | rc = cifs_get_inode_info_unix(&inode, "", inode->i_sb, xid); |
1da177e4 | 642 | else |
8b1327f6 SF |
643 | rc = cifs_get_inode_info(&inode, "", NULL, inode->i_sb, xid, |
644 | NULL); | |
7f8ed420 SF |
645 | if (rc && cifs_sb->tcon->ipc) { |
646 | cFYI(1, ("ipc connection - fake read inode")); | |
647 | inode->i_mode |= S_IFDIR; | |
648 | inode->i_nlink = 2; | |
649 | inode->i_op = &cifs_ipc_inode_ops; | |
650 | inode->i_fop = &simple_dir_operations; | |
651 | inode->i_uid = cifs_sb->mnt_uid; | |
652 | inode->i_gid = cifs_sb->mnt_gid; | |
ad661334 | 653 | } else if (rc) { |
ce634ab2 DH |
654 | _FreeXid(xid); |
655 | iget_failed(inode); | |
656 | return ERR_PTR(rc); | |
7f8ed420 SF |
657 | } |
658 | ||
ce634ab2 DH |
659 | unlock_new_inode(inode); |
660 | ||
661 | /* can not call macro FreeXid here since in a void func | |
662 | * TODO: This is no longer true | |
663 | */ | |
1da177e4 | 664 | _FreeXid(xid); |
ce634ab2 | 665 | return inode; |
1da177e4 LT |
666 | } |
667 | ||
388e57b2 SF |
668 | static int |
669 | cifs_set_file_info(struct inode *inode, struct iattr *attrs, int xid, | |
670 | char *full_path, __u32 dosattr) | |
671 | { | |
672 | int rc; | |
673 | int oplock = 0; | |
674 | __u16 netfid; | |
675 | __u32 netpid; | |
676 | bool set_time = false; | |
677 | struct cifsFileInfo *open_file; | |
678 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); | |
679 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
680 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
681 | FILE_BASIC_INFO info_buf; | |
682 | ||
683 | if (attrs->ia_valid & ATTR_ATIME) { | |
684 | set_time = true; | |
685 | info_buf.LastAccessTime = | |
686 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime)); | |
687 | } else | |
688 | info_buf.LastAccessTime = 0; | |
689 | ||
690 | if (attrs->ia_valid & ATTR_MTIME) { | |
691 | set_time = true; | |
692 | info_buf.LastWriteTime = | |
693 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime)); | |
694 | } else | |
695 | info_buf.LastWriteTime = 0; | |
696 | ||
697 | /* | |
698 | * Samba throws this field away, but windows may actually use it. | |
699 | * Do not set ctime unless other time stamps are changed explicitly | |
700 | * (i.e. by utimes()) since we would then have a mix of client and | |
701 | * server times. | |
702 | */ | |
703 | if (set_time && (attrs->ia_valid & ATTR_CTIME)) { | |
704 | cFYI(1, ("CIFS - CTIME changed")); | |
705 | info_buf.ChangeTime = | |
706 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime)); | |
707 | } else | |
708 | info_buf.ChangeTime = 0; | |
709 | ||
710 | info_buf.CreationTime = 0; /* don't change */ | |
711 | info_buf.Attributes = cpu_to_le32(dosattr); | |
712 | ||
713 | /* | |
714 | * If the file is already open for write, just use that fileid | |
715 | */ | |
716 | open_file = find_writable_file(cifsInode); | |
717 | if (open_file) { | |
718 | netfid = open_file->netfid; | |
719 | netpid = open_file->pid; | |
720 | goto set_via_filehandle; | |
721 | } | |
722 | ||
723 | /* | |
724 | * NT4 apparently returns success on this call, but it doesn't | |
725 | * really work. | |
726 | */ | |
727 | if (!(pTcon->ses->flags & CIFS_SES_NT4)) { | |
728 | rc = CIFSSMBSetPathInfo(xid, pTcon, full_path, | |
729 | &info_buf, cifs_sb->local_nls, | |
730 | cifs_sb->mnt_cifs_flags & | |
731 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
732 | if (rc != -EOPNOTSUPP && rc != -EINVAL) | |
733 | goto out; | |
734 | } | |
735 | ||
736 | cFYI(1, ("calling SetFileInfo since SetPathInfo for " | |
737 | "times not supported by this server")); | |
738 | rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, | |
739 | SYNCHRONIZE | FILE_WRITE_ATTRIBUTES, | |
740 | CREATE_NOT_DIR, &netfid, &oplock, | |
741 | NULL, cifs_sb->local_nls, | |
742 | cifs_sb->mnt_cifs_flags & | |
743 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
744 | ||
745 | if (rc != 0) { | |
746 | if (rc == -EIO) | |
747 | rc = -EINVAL; | |
748 | goto out; | |
749 | } | |
750 | ||
751 | netpid = current->tgid; | |
752 | ||
753 | set_via_filehandle: | |
754 | rc = CIFSSMBSetFileInfo(xid, pTcon, &info_buf, netfid, netpid); | |
755 | if (open_file == NULL) | |
756 | CIFSSMBClose(xid, pTcon, netfid); | |
757 | else | |
758 | atomic_dec(&open_file->wrtPending); | |
759 | out: | |
760 | return rc; | |
761 | } | |
762 | ||
a12a1ac7 JL |
763 | /* |
764 | * open the given file (if it isn't already), set the DELETE_ON_CLOSE bit | |
765 | * and rename it to a random name that hopefully won't conflict with | |
766 | * anything else. | |
767 | */ | |
768 | static int | |
769 | cifs_rename_pending_delete(char *full_path, struct inode *inode, int xid) | |
770 | { | |
771 | int oplock = 0; | |
772 | int rc; | |
773 | __u16 netfid; | |
774 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); | |
775 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
776 | struct cifsTconInfo *tcon = cifs_sb->tcon; | |
777 | __u32 dosattr; | |
778 | FILE_BASIC_INFO *info_buf; | |
779 | ||
780 | rc = CIFSSMBOpen(xid, tcon, full_path, FILE_OPEN, | |
7ce86d5a JL |
781 | DELETE|FILE_WRITE_ATTRIBUTES, |
782 | CREATE_NOT_DIR|CREATE_DELETE_ON_CLOSE, | |
a12a1ac7 JL |
783 | &netfid, &oplock, NULL, cifs_sb->local_nls, |
784 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
785 | if (rc != 0) | |
786 | goto out; | |
787 | ||
788 | /* set ATTR_HIDDEN and clear ATTR_READONLY */ | |
789 | cifsInode = CIFS_I(inode); | |
790 | dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY; | |
791 | if (dosattr == 0) | |
792 | dosattr |= ATTR_NORMAL; | |
793 | dosattr |= ATTR_HIDDEN; | |
794 | ||
795 | info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL); | |
796 | if (info_buf == NULL) { | |
797 | rc = -ENOMEM; | |
798 | goto out_close; | |
799 | } | |
800 | info_buf->Attributes = cpu_to_le32(dosattr); | |
801 | rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid, current->tgid); | |
802 | kfree(info_buf); | |
803 | if (rc != 0) | |
804 | goto out_close; | |
805 | ||
806 | /* silly-rename the file */ | |
7ce86d5a | 807 | CIFSSMBRenameOpenFile(xid, tcon, netfid, NULL, cifs_sb->local_nls, |
a12a1ac7 JL |
808 | cifs_sb->mnt_cifs_flags & |
809 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
6d22f098 JL |
810 | |
811 | /* set DELETE_ON_CLOSE */ | |
812 | rc = CIFSSMBSetFileDisposition(xid, tcon, true, netfid, current->tgid); | |
813 | ||
7ce86d5a JL |
814 | /* |
815 | * some samba versions return -ENOENT when we try to set the file | |
816 | * disposition here. Likely a samba bug, but work around it for now | |
817 | */ | |
818 | if (rc == -ENOENT) | |
819 | rc = 0; | |
820 | ||
a12a1ac7 JL |
821 | out_close: |
822 | CIFSSMBClose(xid, tcon, netfid); | |
823 | out: | |
824 | return rc; | |
825 | } | |
826 | ||
5f0319a7 | 827 | int cifs_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
828 | { |
829 | int rc = 0; | |
830 | int xid; | |
1da177e4 | 831 | char *full_path = NULL; |
5f0319a7 | 832 | struct inode *inode = dentry->d_inode; |
1da177e4 | 833 | struct cifsInodeInfo *cifsInode; |
5f0319a7 JL |
834 | struct super_block *sb = dir->i_sb; |
835 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
836 | struct cifsTconInfo *tcon = cifs_sb->tcon; | |
388e57b2 SF |
837 | struct iattr *attrs; |
838 | __u32 dosattr; | |
1da177e4 | 839 | |
5f0319a7 | 840 | cFYI(1, ("cifs_unlink, dir=0x%p, dentry=0x%p", dir, dentry)); |
1da177e4 LT |
841 | |
842 | xid = GetXid(); | |
843 | ||
5f0319a7 JL |
844 | /* Unlink can be called from rename so we can not take the |
845 | * sb->s_vfs_rename_mutex here */ | |
846 | full_path = build_path_from_dentry(dentry); | |
1da177e4 LT |
847 | if (full_path == NULL) { |
848 | FreeXid(xid); | |
849 | return -ENOMEM; | |
850 | } | |
2d785a50 | 851 | |
5f0319a7 | 852 | if ((tcon->ses->capabilities & CAP_UNIX) && |
2d785a50 | 853 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
5f0319a7 JL |
854 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { |
855 | rc = CIFSPOSIXDelFile(xid, tcon, full_path, | |
2d785a50 | 856 | SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls, |
737b758c | 857 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
2d785a50 SF |
858 | cFYI(1, ("posix del rc %d", rc)); |
859 | if ((rc == 0) || (rc == -ENOENT)) | |
860 | goto psx_del_no_retry; | |
861 | } | |
1da177e4 | 862 | |
5f0319a7 | 863 | rc = CIFSSMBDelFile(xid, tcon, full_path, cifs_sb->local_nls, |
2d785a50 SF |
864 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
865 | psx_del_no_retry: | |
1da177e4 | 866 | if (!rc) { |
5f0319a7 JL |
867 | if (inode) |
868 | drop_nlink(inode); | |
1da177e4 | 869 | } else if (rc == -ENOENT) { |
5f0319a7 | 870 | d_drop(dentry); |
1da177e4 | 871 | } else if (rc == -ETXTBSY) { |
a12a1ac7 JL |
872 | rc = cifs_rename_pending_delete(full_path, inode, xid); |
873 | if (rc == 0) | |
874 | drop_nlink(inode); | |
1da177e4 LT |
875 | } else if (rc == -EACCES) { |
876 | /* try only if r/o attribute set in local lookup data? */ | |
388e57b2 SF |
877 | attrs = kzalloc(sizeof(*attrs), GFP_KERNEL); |
878 | if (attrs == NULL) { | |
879 | rc = -ENOMEM; | |
880 | goto out_reval; | |
1da177e4 | 881 | } |
388e57b2 SF |
882 | |
883 | /* try to reset dos attributes */ | |
884 | cifsInode = CIFS_I(inode); | |
885 | dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY; | |
886 | if (dosattr == 0) | |
887 | dosattr |= ATTR_NORMAL; | |
888 | dosattr |= ATTR_HIDDEN; | |
889 | ||
890 | rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); | |
891 | kfree(attrs); | |
892 | if (rc != 0) | |
893 | goto out_reval; | |
894 | rc = CIFSSMBDelFile(xid, tcon, full_path, cifs_sb->local_nls, | |
895 | cifs_sb->mnt_cifs_flags & | |
896 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
fb8c4b14 | 897 | if (rc == 0) { |
388e57b2 SF |
898 | if (inode) |
899 | drop_nlink(inode); | |
900 | } else if (rc == -ETXTBSY) { | |
a12a1ac7 JL |
901 | rc = cifs_rename_pending_delete(full_path, inode, xid); |
902 | if (rc == 0) | |
903 | drop_nlink(inode); | |
1da177e4 LT |
904 | } |
905 | } | |
388e57b2 | 906 | out_reval: |
4523cc30 | 907 | if (inode) { |
06bcfedd | 908 | cifsInode = CIFS_I(inode); |
5f0319a7 JL |
909 | cifsInode->time = 0; /* will force revalidate to get info |
910 | when needed */ | |
911 | inode->i_ctime = current_fs_time(sb); | |
06bcfedd | 912 | } |
5f0319a7 JL |
913 | dir->i_ctime = dir->i_mtime = current_fs_time(sb); |
914 | cifsInode = CIFS_I(dir); | |
915 | cifsInode->time = 0; /* force revalidate of dir as well */ | |
1da177e4 LT |
916 | |
917 | kfree(full_path); | |
918 | FreeXid(xid); | |
919 | return rc; | |
920 | } | |
921 | ||
2dd29d31 | 922 | static void posix_fill_in_inode(struct inode *tmp_inode, |
0b442d2c | 923 | FILE_UNIX_BASIC_INFO *pData, int isNewInode) |
2dd29d31 | 924 | { |
75f12983 | 925 | struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); |
2dd29d31 SF |
926 | loff_t local_size; |
927 | struct timespec local_mtime; | |
928 | ||
2dd29d31 SF |
929 | cifsInfo->time = jiffies; |
930 | atomic_inc(&cifsInfo->inUse); | |
931 | ||
932 | /* save mtime and size */ | |
933 | local_mtime = tmp_inode->i_mtime; | |
934 | local_size = tmp_inode->i_size; | |
935 | ||
75f12983 | 936 | cifs_unix_info_to_inode(tmp_inode, pData, 1); |
7962670e | 937 | cifs_set_ops(tmp_inode, false); |
50c2f753 | 938 | |
75f12983 CH |
939 | if (!S_ISREG(tmp_inode->i_mode)) |
940 | return; | |
2dd29d31 | 941 | |
75f12983 CH |
942 | /* |
943 | * No sense invalidating pages for new inode | |
944 | * since we we have not started caching | |
945 | * readahead file data yet. | |
946 | */ | |
947 | if (isNewInode) | |
948 | return; | |
2dd29d31 | 949 | |
75f12983 CH |
950 | if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && |
951 | (local_size == tmp_inode->i_size)) { | |
952 | cFYI(1, ("inode exists but unchanged")); | |
2dd29d31 | 953 | } else { |
75f12983 CH |
954 | /* file may have changed on server */ |
955 | cFYI(1, ("invalidate inode, readdir detected change")); | |
956 | invalidate_remote_inode(tmp_inode); | |
fb8c4b14 | 957 | } |
2dd29d31 SF |
958 | } |
959 | ||
1da177e4 LT |
960 | int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode) |
961 | { | |
962 | int rc = 0; | |
963 | int xid; | |
964 | struct cifs_sb_info *cifs_sb; | |
965 | struct cifsTconInfo *pTcon; | |
966 | char *full_path = NULL; | |
967 | struct inode *newinode = NULL; | |
968 | ||
6473a559 | 969 | cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode)); |
1da177e4 LT |
970 | |
971 | xid = GetXid(); | |
972 | ||
973 | cifs_sb = CIFS_SB(inode->i_sb); | |
974 | pTcon = cifs_sb->tcon; | |
975 | ||
7f57356b | 976 | full_path = build_path_from_dentry(direntry); |
1da177e4 LT |
977 | if (full_path == NULL) { |
978 | FreeXid(xid); | |
979 | return -ENOMEM; | |
980 | } | |
50c2f753 | 981 | |
fb8c4b14 SF |
982 | if ((pTcon->ses->capabilities & CAP_UNIX) && |
983 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & | |
2dd29d31 SF |
984 | le64_to_cpu(pTcon->fsUnixInfo.Capability))) { |
985 | u32 oplock = 0; | |
f6d09982 | 986 | FILE_UNIX_BASIC_INFO *pInfo = |
2dd29d31 | 987 | kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL); |
fb8c4b14 | 988 | if (pInfo == NULL) { |
2dd29d31 SF |
989 | rc = -ENOMEM; |
990 | goto mkdir_out; | |
991 | } | |
50c2f753 | 992 | |
a8cd925f | 993 | mode &= ~current->fs->umask; |
2dd29d31 SF |
994 | rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT, |
995 | mode, NULL /* netfid */, pInfo, &oplock, | |
fb8c4b14 SF |
996 | full_path, cifs_sb->local_nls, |
997 | cifs_sb->mnt_cifs_flags & | |
2dd29d31 | 998 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
c45d707f SF |
999 | if (rc == -EOPNOTSUPP) { |
1000 | kfree(pInfo); | |
1001 | goto mkdir_retry_old; | |
1002 | } else if (rc) { | |
2dd29d31 SF |
1003 | cFYI(1, ("posix mkdir returned 0x%x", rc)); |
1004 | d_drop(direntry); | |
1005 | } else { | |
8f2376ad CG |
1006 | if (pInfo->Type == cpu_to_le32(-1)) { |
1007 | /* no return info, go query for it */ | |
5a07cdf8 | 1008 | kfree(pInfo); |
fb8c4b14 | 1009 | goto mkdir_get_info; |
5a07cdf8 | 1010 | } |
fb8c4b14 SF |
1011 | /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need |
1012 | to set uid/gid */ | |
2dd29d31 SF |
1013 | inc_nlink(inode); |
1014 | if (pTcon->nocase) | |
1015 | direntry->d_op = &cifs_ci_dentry_ops; | |
1016 | else | |
1017 | direntry->d_op = &cifs_dentry_ops; | |
cbac3cba SF |
1018 | |
1019 | newinode = new_inode(inode->i_sb); | |
5a07cdf8 SF |
1020 | if (newinode == NULL) { |
1021 | kfree(pInfo); | |
cbac3cba | 1022 | goto mkdir_get_info; |
5a07cdf8 | 1023 | } |
cbac3cba SF |
1024 | /* Is an i_ino of zero legal? */ |
1025 | /* Are there sanity checks we can use to ensure that | |
1026 | the server is really filling in that field? */ | |
1027 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { | |
1028 | newinode->i_ino = | |
1029 | (unsigned long)pInfo->UniqueId; | |
1030 | } /* note ino incremented to unique num in new_inode */ | |
fb8c4b14 | 1031 | if (inode->i_sb->s_flags & MS_NOATIME) |
cbac3cba SF |
1032 | newinode->i_flags |= S_NOATIME | S_NOCMTIME; |
1033 | newinode->i_nlink = 2; | |
1034 | ||
1035 | insert_inode_hash(newinode); | |
2dd29d31 | 1036 | d_instantiate(direntry, newinode); |
cbac3cba SF |
1037 | |
1038 | /* we already checked in POSIXCreate whether | |
1039 | frame was long enough */ | |
1040 | posix_fill_in_inode(direntry->d_inode, | |
0b442d2c | 1041 | pInfo, 1 /* NewInode */); |
cbac3cba | 1042 | #ifdef CONFIG_CIFS_DEBUG2 |
fb8c4b14 | 1043 | cFYI(1, ("instantiated dentry %p %s to inode %p", |
cbac3cba SF |
1044 | direntry, direntry->d_name.name, newinode)); |
1045 | ||
fb8c4b14 SF |
1046 | if (newinode->i_nlink != 2) |
1047 | cFYI(1, ("unexpected number of links %d", | |
cbac3cba SF |
1048 | newinode->i_nlink)); |
1049 | #endif | |
2dd29d31 SF |
1050 | } |
1051 | kfree(pInfo); | |
1052 | goto mkdir_out; | |
fb8c4b14 | 1053 | } |
c45d707f | 1054 | mkdir_retry_old: |
1da177e4 | 1055 | /* BB add setting the equivalent of mode via CreateX w/ACLs */ |
737b758c SF |
1056 | rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls, |
1057 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 | 1058 | if (rc) { |
26a21b98 | 1059 | cFYI(1, ("cifs_mkdir returned 0x%x", rc)); |
1da177e4 LT |
1060 | d_drop(direntry); |
1061 | } else { | |
fb8c4b14 | 1062 | mkdir_get_info: |
d8c76e6f | 1063 | inc_nlink(inode); |
c18c842b | 1064 | if (pTcon->unix_ext) |
1da177e4 | 1065 | rc = cifs_get_inode_info_unix(&newinode, full_path, |
fb8c4b14 | 1066 | inode->i_sb, xid); |
1da177e4 LT |
1067 | else |
1068 | rc = cifs_get_inode_info(&newinode, full_path, NULL, | |
8b1327f6 | 1069 | inode->i_sb, xid, NULL); |
1da177e4 | 1070 | |
b92327fe SF |
1071 | if (pTcon->nocase) |
1072 | direntry->d_op = &cifs_ci_dentry_ops; | |
1073 | else | |
1074 | direntry->d_op = &cifs_dentry_ops; | |
1da177e4 | 1075 | d_instantiate(direntry, newinode); |
2dd29d31 | 1076 | /* setting nlink not necessary except in cases where we |
fb8c4b14 | 1077 | * failed to get it from the server or was set bogus */ |
2dd29d31 | 1078 | if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2)) |
fb8c4b14 | 1079 | direntry->d_inode->i_nlink = 2; |
95089910 | 1080 | |
67750fb9 | 1081 | mode &= ~current->fs->umask; |
95089910 JL |
1082 | /* must turn on setgid bit if parent dir has it */ |
1083 | if (inode->i_mode & S_ISGID) | |
1084 | mode |= S_ISGID; | |
1085 | ||
c18c842b | 1086 | if (pTcon->unix_ext) { |
4e1e7fb9 JL |
1087 | struct cifs_unix_set_info_args args = { |
1088 | .mode = mode, | |
1089 | .ctime = NO_CHANGE_64, | |
1090 | .atime = NO_CHANGE_64, | |
1091 | .mtime = NO_CHANGE_64, | |
1092 | .device = 0, | |
1093 | }; | |
d0d2f2df | 1094 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
4e1e7fb9 | 1095 | args.uid = (__u64)current->fsuid; |
95089910 JL |
1096 | if (inode->i_mode & S_ISGID) |
1097 | args.gid = (__u64)inode->i_gid; | |
1098 | else | |
1099 | args.gid = (__u64)current->fsgid; | |
1da177e4 | 1100 | } else { |
4e1e7fb9 JL |
1101 | args.uid = NO_CHANGE_64; |
1102 | args.gid = NO_CHANGE_64; | |
1da177e4 | 1103 | } |
4e1e7fb9 JL |
1104 | CIFSSMBUnixSetInfo(xid, pTcon, full_path, &args, |
1105 | cifs_sb->local_nls, | |
1106 | cifs_sb->mnt_cifs_flags & | |
1107 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
3ce53fc4 | 1108 | } else { |
67750fb9 JL |
1109 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) && |
1110 | (mode & S_IWUGO) == 0) { | |
1111 | FILE_BASIC_INFO pInfo; | |
1112 | memset(&pInfo, 0, sizeof(pInfo)); | |
1113 | pInfo.Attributes = cpu_to_le32(ATTR_READONLY); | |
6fc000e5 | 1114 | CIFSSMBSetPathInfo(xid, pTcon, full_path, |
67750fb9 JL |
1115 | &pInfo, cifs_sb->local_nls, |
1116 | cifs_sb->mnt_cifs_flags & | |
1117 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1118 | } | |
fb8c4b14 | 1119 | if (direntry->d_inode) { |
b0fd30d3 JL |
1120 | if (cifs_sb->mnt_cifs_flags & |
1121 | CIFS_MOUNT_DYNPERM) | |
1122 | direntry->d_inode->i_mode = | |
1123 | (mode | S_IFDIR); | |
4e94a105 | 1124 | |
fb8c4b14 | 1125 | if (cifs_sb->mnt_cifs_flags & |
6473a559 | 1126 | CIFS_MOUNT_SET_UID) { |
fb8c4b14 | 1127 | direntry->d_inode->i_uid = |
6473a559 | 1128 | current->fsuid; |
95089910 JL |
1129 | if (inode->i_mode & S_ISGID) |
1130 | direntry->d_inode->i_gid = | |
1131 | inode->i_gid; | |
1132 | else | |
1133 | direntry->d_inode->i_gid = | |
1134 | current->fsgid; | |
6473a559 SF |
1135 | } |
1136 | } | |
2a138ebb | 1137 | } |
1da177e4 | 1138 | } |
fb8c4b14 | 1139 | mkdir_out: |
1da177e4 LT |
1140 | kfree(full_path); |
1141 | FreeXid(xid); | |
1142 | return rc; | |
1143 | } | |
1144 | ||
1145 | int cifs_rmdir(struct inode *inode, struct dentry *direntry) | |
1146 | { | |
1147 | int rc = 0; | |
1148 | int xid; | |
1149 | struct cifs_sb_info *cifs_sb; | |
1150 | struct cifsTconInfo *pTcon; | |
1151 | char *full_path = NULL; | |
1152 | struct cifsInodeInfo *cifsInode; | |
1153 | ||
26a21b98 | 1154 | cFYI(1, ("cifs_rmdir, inode = 0x%p", inode)); |
1da177e4 LT |
1155 | |
1156 | xid = GetXid(); | |
1157 | ||
1158 | cifs_sb = CIFS_SB(inode->i_sb); | |
1159 | pTcon = cifs_sb->tcon; | |
1160 | ||
7f57356b | 1161 | full_path = build_path_from_dentry(direntry); |
1da177e4 LT |
1162 | if (full_path == NULL) { |
1163 | FreeXid(xid); | |
1164 | return -ENOMEM; | |
1165 | } | |
1166 | ||
737b758c SF |
1167 | rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls, |
1168 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
1169 | |
1170 | if (!rc) { | |
9a53c3a7 | 1171 | drop_nlink(inode); |
3677db10 | 1172 | spin_lock(&direntry->d_inode->i_lock); |
fb8c4b14 | 1173 | i_size_write(direntry->d_inode, 0); |
ce71ec36 | 1174 | clear_nlink(direntry->d_inode); |
3677db10 | 1175 | spin_unlock(&direntry->d_inode->i_lock); |
1da177e4 LT |
1176 | } |
1177 | ||
1178 | cifsInode = CIFS_I(direntry->d_inode); | |
1179 | cifsInode->time = 0; /* force revalidate to go get info when | |
1180 | needed */ | |
1181 | direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime = | |
1182 | current_fs_time(inode->i_sb); | |
1183 | ||
1184 | kfree(full_path); | |
1185 | FreeXid(xid); | |
1186 | return rc; | |
1187 | } | |
1188 | ||
ee2fd967 SF |
1189 | static int |
1190 | cifs_do_rename(int xid, struct dentry *from_dentry, const char *fromPath, | |
1191 | struct dentry *to_dentry, const char *toPath) | |
1192 | { | |
1193 | struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb); | |
1194 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
1195 | __u16 srcfid; | |
1196 | int oplock, rc; | |
1197 | ||
1198 | /* try path-based rename first */ | |
1199 | rc = CIFSSMBRename(xid, pTcon, fromPath, toPath, cifs_sb->local_nls, | |
1200 | cifs_sb->mnt_cifs_flags & | |
1201 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1202 | ||
1203 | /* | |
1204 | * don't bother with rename by filehandle unless file is busy and | |
1205 | * source Note that cross directory moves do not work with | |
1206 | * rename by filehandle to various Windows servers. | |
1207 | */ | |
1208 | if (rc == 0 || rc != -ETXTBSY) | |
1209 | return rc; | |
1210 | ||
1211 | /* open the file to be renamed -- we need DELETE perms */ | |
1212 | rc = CIFSSMBOpen(xid, pTcon, fromPath, FILE_OPEN, DELETE, | |
1213 | CREATE_NOT_DIR, &srcfid, &oplock, NULL, | |
1214 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
1215 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1216 | ||
1217 | if (rc == 0) { | |
1218 | rc = CIFSSMBRenameOpenFile(xid, pTcon, srcfid, | |
1219 | (const char *) to_dentry->d_name.name, | |
1220 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
1221 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1222 | ||
1223 | CIFSSMBClose(xid, pTcon, srcfid); | |
1224 | } | |
1225 | ||
1226 | return rc; | |
1227 | } | |
1228 | ||
1da177e4 LT |
1229 | int cifs_rename(struct inode *source_inode, struct dentry *source_direntry, |
1230 | struct inode *target_inode, struct dentry *target_direntry) | |
1231 | { | |
ee2fd967 SF |
1232 | char *fromName = NULL; |
1233 | char *toName = NULL; | |
1da177e4 LT |
1234 | struct cifs_sb_info *cifs_sb_source; |
1235 | struct cifs_sb_info *cifs_sb_target; | |
1236 | struct cifsTconInfo *pTcon; | |
ee2fd967 SF |
1237 | FILE_UNIX_BASIC_INFO *info_buf_source = NULL; |
1238 | FILE_UNIX_BASIC_INFO *info_buf_target; | |
1da177e4 | 1239 | int xid; |
ee2fd967 | 1240 | int rc; |
1da177e4 LT |
1241 | |
1242 | cifs_sb_target = CIFS_SB(target_inode->i_sb); | |
1243 | cifs_sb_source = CIFS_SB(source_inode->i_sb); | |
1244 | pTcon = cifs_sb_source->tcon; | |
1245 | ||
ee2fd967 SF |
1246 | xid = GetXid(); |
1247 | ||
1248 | /* | |
1249 | * BB: this might be allowed if same server, but different share. | |
1250 | * Consider adding support for this | |
1251 | */ | |
1da177e4 | 1252 | if (pTcon != cifs_sb_target->tcon) { |
ee2fd967 SF |
1253 | rc = -EXDEV; |
1254 | goto cifs_rename_exit; | |
1da177e4 LT |
1255 | } |
1256 | ||
ee2fd967 SF |
1257 | /* |
1258 | * we already have the rename sem so we do not need to | |
1259 | * grab it again here to protect the path integrity | |
1260 | */ | |
7f57356b | 1261 | fromName = build_path_from_dentry(source_direntry); |
ee2fd967 SF |
1262 | if (fromName == NULL) { |
1263 | rc = -ENOMEM; | |
1264 | goto cifs_rename_exit; | |
1265 | } | |
1266 | ||
7f57356b | 1267 | toName = build_path_from_dentry(target_direntry); |
ee2fd967 | 1268 | if (toName == NULL) { |
1da177e4 LT |
1269 | rc = -ENOMEM; |
1270 | goto cifs_rename_exit; | |
1271 | } | |
1272 | ||
ee2fd967 SF |
1273 | rc = cifs_do_rename(xid, source_direntry, fromName, |
1274 | target_direntry, toName); | |
1275 | ||
1da177e4 | 1276 | if (rc == -EEXIST) { |
ee2fd967 SF |
1277 | if (pTcon->unix_ext) { |
1278 | /* | |
1279 | * Are src and dst hardlinks of same inode? We can | |
1280 | * only tell with unix extensions enabled | |
1281 | */ | |
1282 | info_buf_source = | |
1283 | kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), | |
1284 | GFP_KERNEL); | |
74553b1b | 1285 | if (info_buf_source == NULL) |
ee2fd967 SF |
1286 | goto unlink_target; |
1287 | ||
1da177e4 | 1288 | info_buf_target = info_buf_source + 1; |
ee2fd967 SF |
1289 | rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName, |
1290 | info_buf_source, | |
1291 | cifs_sb_source->local_nls, | |
1292 | cifs_sb_source->mnt_cifs_flags & | |
8e87d4dc | 1293 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
ee2fd967 SF |
1294 | if (rc != 0) |
1295 | goto unlink_target; | |
1296 | ||
1297 | rc = CIFSSMBUnixQPathInfo(xid, pTcon, | |
1298 | toName, info_buf_target, | |
737b758c SF |
1299 | cifs_sb_target->local_nls, |
1300 | /* remap based on source sb */ | |
1301 | cifs_sb_source->mnt_cifs_flags & | |
737b758c | 1302 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
ee2fd967 SF |
1303 | |
1304 | if (rc == 0 && (info_buf_source->UniqueId == | |
1305 | info_buf_target->UniqueId)) | |
1306 | /* same file, POSIX says that this is a noop */ | |
1307 | goto cifs_rename_exit; | |
1308 | } /* else ... BB we could add the same check for Windows by | |
1309 | checking the UniqueId via FILE_INTERNAL_INFO */ | |
1310 | unlink_target: | |
1311 | /* | |
1312 | * we either can not tell the files are hardlinked (as with | |
1313 | * Windows servers) or files are not hardlinked. Delete the | |
1314 | * target manually before renaming to follow POSIX rather than | |
1315 | * Windows semantics | |
1316 | */ | |
1317 | cifs_unlink(target_inode, target_direntry); | |
1318 | rc = cifs_do_rename(xid, source_direntry, fromName, | |
1319 | target_direntry, toName); | |
1da177e4 LT |
1320 | } |
1321 | ||
1322 | cifs_rename_exit: | |
ee2fd967 | 1323 | kfree(info_buf_source); |
1da177e4 LT |
1324 | kfree(fromName); |
1325 | kfree(toName); | |
1326 | FreeXid(xid); | |
1327 | return rc; | |
1328 | } | |
1329 | ||
1330 | int cifs_revalidate(struct dentry *direntry) | |
1331 | { | |
1332 | int xid; | |
cea21805 | 1333 | int rc = 0, wbrc = 0; |
1da177e4 LT |
1334 | char *full_path; |
1335 | struct cifs_sb_info *cifs_sb; | |
1336 | struct cifsInodeInfo *cifsInode; | |
1337 | loff_t local_size; | |
1338 | struct timespec local_mtime; | |
4b18f2a9 | 1339 | bool invalidate_inode = false; |
1da177e4 LT |
1340 | |
1341 | if (direntry->d_inode == NULL) | |
1342 | return -ENOENT; | |
1343 | ||
1344 | cifsInode = CIFS_I(direntry->d_inode); | |
1345 | ||
1346 | if (cifsInode == NULL) | |
1347 | return -ENOENT; | |
1348 | ||
1349 | /* no sense revalidating inode info on file that no one can write */ | |
1350 | if (CIFS_I(direntry->d_inode)->clientCanCacheRead) | |
1351 | return rc; | |
1352 | ||
1353 | xid = GetXid(); | |
1354 | ||
1355 | cifs_sb = CIFS_SB(direntry->d_sb); | |
1356 | ||
1357 | /* can not safely grab the rename sem here if rename calls revalidate | |
1358 | since that would deadlock */ | |
7f57356b | 1359 | full_path = build_path_from_dentry(direntry); |
1da177e4 LT |
1360 | if (full_path == NULL) { |
1361 | FreeXid(xid); | |
1362 | return -ENOMEM; | |
1363 | } | |
1364 | cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld " | |
1365 | "jiffies %ld", full_path, direntry->d_inode, | |
1366 | direntry->d_inode->i_count.counter, direntry, | |
1367 | direntry->d_time, jiffies)); | |
1368 | ||
1369 | if (cifsInode->time == 0) { | |
1370 | /* was set to zero previously to force revalidate */ | |
1371 | } else if (time_before(jiffies, cifsInode->time + HZ) && | |
1372 | lookupCacheEnabled) { | |
1373 | if ((S_ISREG(direntry->d_inode->i_mode) == 0) || | |
1374 | (direntry->d_inode->i_nlink == 1)) { | |
1375 | kfree(full_path); | |
1376 | FreeXid(xid); | |
1377 | return rc; | |
1378 | } else { | |
1379 | cFYI(1, ("Have to revalidate file due to hardlinks")); | |
1380 | } | |
1381 | } | |
1382 | ||
1383 | /* save mtime and size */ | |
1384 | local_mtime = direntry->d_inode->i_mtime; | |
1385 | local_size = direntry->d_inode->i_size; | |
1386 | ||
c18c842b | 1387 | if (cifs_sb->tcon->unix_ext) { |
1da177e4 | 1388 | rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path, |
fb8c4b14 | 1389 | direntry->d_sb, xid); |
1da177e4 LT |
1390 | if (rc) { |
1391 | cFYI(1, ("error on getting revalidate info %d", rc)); | |
1392 | /* if (rc != -ENOENT) | |
1393 | rc = 0; */ /* BB should we cache info on | |
1394 | certain errors? */ | |
1395 | } | |
1396 | } else { | |
1397 | rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL, | |
8b1327f6 | 1398 | direntry->d_sb, xid, NULL); |
1da177e4 LT |
1399 | if (rc) { |
1400 | cFYI(1, ("error on getting revalidate info %d", rc)); | |
1401 | /* if (rc != -ENOENT) | |
1402 | rc = 0; */ /* BB should we cache info on | |
1403 | certain errors? */ | |
1404 | } | |
1405 | } | |
1406 | /* should we remap certain errors, access denied?, to zero */ | |
1407 | ||
1408 | /* if not oplocked, we invalidate inode pages if mtime or file size | |
1409 | had changed on server */ | |
1410 | ||
fb8c4b14 | 1411 | if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) && |
1da177e4 LT |
1412 | (local_size == direntry->d_inode->i_size)) { |
1413 | cFYI(1, ("cifs_revalidate - inode unchanged")); | |
1414 | } else { | |
1415 | /* file may have changed on server */ | |
1416 | if (cifsInode->clientCanCacheRead) { | |
1417 | /* no need to invalidate inode pages since we were the | |
1418 | only ones who could have modified the file and the | |
1419 | server copy is staler than ours */ | |
1420 | } else { | |
4b18f2a9 | 1421 | invalidate_inode = true; |
1da177e4 LT |
1422 | } |
1423 | } | |
1424 | ||
1425 | /* can not grab this sem since kernel filesys locking documentation | |
1b1dcc1b JS |
1426 | indicates i_mutex may be taken by the kernel on lookup and rename |
1427 | which could deadlock if we grab the i_mutex here as well */ | |
1428 | /* mutex_lock(&direntry->d_inode->i_mutex);*/ | |
1da177e4 LT |
1429 | /* need to write out dirty pages here */ |
1430 | if (direntry->d_inode->i_mapping) { | |
1431 | /* do we need to lock inode until after invalidate completes | |
1432 | below? */ | |
cea21805 JL |
1433 | wbrc = filemap_fdatawrite(direntry->d_inode->i_mapping); |
1434 | if (wbrc) | |
1435 | CIFS_I(direntry->d_inode)->write_behind_rc = wbrc; | |
1da177e4 LT |
1436 | } |
1437 | if (invalidate_inode) { | |
3abb9272 SF |
1438 | /* shrink_dcache not necessary now that cifs dentry ops |
1439 | are exported for negative dentries */ | |
fb8c4b14 | 1440 | /* if (S_ISDIR(direntry->d_inode->i_mode)) |
3abb9272 SF |
1441 | shrink_dcache_parent(direntry); */ |
1442 | if (S_ISREG(direntry->d_inode->i_mode)) { | |
9e96af85 | 1443 | if (direntry->d_inode->i_mapping) { |
cea21805 JL |
1444 | wbrc = filemap_fdatawait(direntry->d_inode->i_mapping); |
1445 | if (wbrc) | |
1446 | CIFS_I(direntry->d_inode)->write_behind_rc = wbrc; | |
9e96af85 | 1447 | } |
3abb9272 SF |
1448 | /* may eventually have to do this for open files too */ |
1449 | if (list_empty(&(cifsInode->openFileList))) { | |
1450 | /* changed on server - flush read ahead pages */ | |
1451 | cFYI(1, ("Invalidating read ahead data on " | |
1452 | "closed file")); | |
1453 | invalidate_remote_inode(direntry->d_inode); | |
1454 | } | |
1da177e4 LT |
1455 | } |
1456 | } | |
1b1dcc1b | 1457 | /* mutex_unlock(&direntry->d_inode->i_mutex); */ |
50c2f753 | 1458 | |
1da177e4 LT |
1459 | kfree(full_path); |
1460 | FreeXid(xid); | |
1461 | return rc; | |
1462 | } | |
1463 | ||
1464 | int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
1465 | struct kstat *stat) | |
1466 | { | |
1467 | int err = cifs_revalidate(dentry); | |
5fe14c85 | 1468 | if (!err) { |
1da177e4 | 1469 | generic_fillattr(dentry->d_inode, stat); |
5fe14c85 SF |
1470 | stat->blksize = CIFS_MAX_MSGSIZE; |
1471 | } | |
1da177e4 LT |
1472 | return err; |
1473 | } | |
1474 | ||
1475 | static int cifs_truncate_page(struct address_space *mapping, loff_t from) | |
1476 | { | |
1477 | pgoff_t index = from >> PAGE_CACHE_SHIFT; | |
1478 | unsigned offset = from & (PAGE_CACHE_SIZE - 1); | |
1479 | struct page *page; | |
1da177e4 LT |
1480 | int rc = 0; |
1481 | ||
1482 | page = grab_cache_page(mapping, index); | |
1483 | if (!page) | |
1484 | return -ENOMEM; | |
1485 | ||
eebd2aa3 | 1486 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); |
1da177e4 LT |
1487 | unlock_page(page); |
1488 | page_cache_release(page); | |
1489 | return rc; | |
1490 | } | |
1491 | ||
fb8c4b14 | 1492 | static int cifs_vmtruncate(struct inode *inode, loff_t offset) |
3677db10 SF |
1493 | { |
1494 | struct address_space *mapping = inode->i_mapping; | |
1495 | unsigned long limit; | |
1496 | ||
ba6a46a0 | 1497 | spin_lock(&inode->i_lock); |
3677db10 SF |
1498 | if (inode->i_size < offset) |
1499 | goto do_expand; | |
1500 | /* | |
1501 | * truncation of in-use swapfiles is disallowed - it would cause | |
1502 | * subsequent swapout to scribble on the now-freed blocks. | |
1503 | */ | |
ba6a46a0 SF |
1504 | if (IS_SWAPFILE(inode)) { |
1505 | spin_unlock(&inode->i_lock); | |
3677db10 | 1506 | goto out_busy; |
ba6a46a0 | 1507 | } |
3677db10 SF |
1508 | i_size_write(inode, offset); |
1509 | spin_unlock(&inode->i_lock); | |
8064ab4d SF |
1510 | /* |
1511 | * unmap_mapping_range is called twice, first simply for efficiency | |
1512 | * so that truncate_inode_pages does fewer single-page unmaps. However | |
1513 | * after this first call, and before truncate_inode_pages finishes, | |
1514 | * it is possible for private pages to be COWed, which remain after | |
1515 | * truncate_inode_pages finishes, hence the second unmap_mapping_range | |
1516 | * call must be made for correctness. | |
1517 | */ | |
3677db10 SF |
1518 | unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1); |
1519 | truncate_inode_pages(mapping, offset); | |
8064ab4d | 1520 | unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1); |
3677db10 SF |
1521 | goto out_truncate; |
1522 | ||
1523 | do_expand: | |
1524 | limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur; | |
ba6a46a0 SF |
1525 | if (limit != RLIM_INFINITY && offset > limit) { |
1526 | spin_unlock(&inode->i_lock); | |
3677db10 | 1527 | goto out_sig; |
ba6a46a0 SF |
1528 | } |
1529 | if (offset > inode->i_sb->s_maxbytes) { | |
1530 | spin_unlock(&inode->i_lock); | |
3677db10 | 1531 | goto out_big; |
ba6a46a0 | 1532 | } |
3677db10 | 1533 | i_size_write(inode, offset); |
ba6a46a0 | 1534 | spin_unlock(&inode->i_lock); |
3677db10 SF |
1535 | out_truncate: |
1536 | if (inode->i_op && inode->i_op->truncate) | |
1537 | inode->i_op->truncate(inode); | |
1538 | return 0; | |
1539 | out_sig: | |
1540 | send_sig(SIGXFSZ, current, 0); | |
1541 | out_big: | |
1542 | return -EFBIG; | |
1543 | out_busy: | |
1544 | return -ETXTBSY; | |
1545 | } | |
1546 | ||
8efdbde6 JL |
1547 | static int |
1548 | cifs_set_file_size(struct inode *inode, struct iattr *attrs, | |
1549 | int xid, char *full_path) | |
1550 | { | |
1551 | int rc; | |
1552 | struct cifsFileInfo *open_file; | |
1553 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); | |
1554 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
1555 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
1556 | ||
1557 | /* | |
1558 | * To avoid spurious oplock breaks from server, in the case of | |
1559 | * inodes that we already have open, avoid doing path based | |
1560 | * setting of file size if we can do it by handle. | |
1561 | * This keeps our caching token (oplock) and avoids timeouts | |
1562 | * when the local oplock break takes longer to flush | |
1563 | * writebehind data than the SMB timeout for the SetPathInfo | |
1564 | * request would allow | |
1565 | */ | |
1566 | open_file = find_writable_file(cifsInode); | |
1567 | if (open_file) { | |
1568 | __u16 nfid = open_file->netfid; | |
1569 | __u32 npid = open_file->pid; | |
1570 | rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size, nfid, | |
1571 | npid, false); | |
1572 | atomic_dec(&open_file->wrtPending); | |
1573 | cFYI(1, ("SetFSize for attrs rc = %d", rc)); | |
1574 | if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { | |
1575 | unsigned int bytes_written; | |
1576 | rc = CIFSSMBWrite(xid, pTcon, nfid, 0, attrs->ia_size, | |
1577 | &bytes_written, NULL, NULL, 1); | |
1578 | cFYI(1, ("Wrt seteof rc %d", rc)); | |
1579 | } | |
1580 | } else | |
1581 | rc = -EINVAL; | |
1582 | ||
1583 | if (rc != 0) { | |
1584 | /* Set file size by pathname rather than by handle | |
1585 | either because no valid, writeable file handle for | |
1586 | it was found or because there was an error setting | |
1587 | it by handle */ | |
1588 | rc = CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, | |
1589 | false, cifs_sb->local_nls, | |
1590 | cifs_sb->mnt_cifs_flags & | |
1591 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1592 | cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc)); | |
1593 | if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { | |
1594 | __u16 netfid; | |
1595 | int oplock = 0; | |
1596 | ||
1597 | rc = SMBLegacyOpen(xid, pTcon, full_path, | |
1598 | FILE_OPEN, GENERIC_WRITE, | |
1599 | CREATE_NOT_DIR, &netfid, &oplock, NULL, | |
1600 | cifs_sb->local_nls, | |
1601 | cifs_sb->mnt_cifs_flags & | |
1602 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1603 | if (rc == 0) { | |
1604 | unsigned int bytes_written; | |
1605 | rc = CIFSSMBWrite(xid, pTcon, netfid, 0, | |
1606 | attrs->ia_size, | |
1607 | &bytes_written, NULL, | |
1608 | NULL, 1); | |
1609 | cFYI(1, ("wrt seteof rc %d", rc)); | |
1610 | CIFSSMBClose(xid, pTcon, netfid); | |
1611 | } | |
1612 | } | |
1613 | } | |
1614 | ||
1615 | if (rc == 0) { | |
1616 | rc = cifs_vmtruncate(inode, attrs->ia_size); | |
1617 | cifs_truncate_page(inode->i_mapping, inode->i_size); | |
1618 | } | |
1619 | ||
1620 | return rc; | |
1621 | } | |
1622 | ||
3fe5c1dd JL |
1623 | static int |
1624 | cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs) | |
1625 | { | |
1626 | int rc; | |
1627 | int xid; | |
1628 | char *full_path = NULL; | |
1629 | struct inode *inode = direntry->d_inode; | |
1630 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); | |
1631 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
1632 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
1633 | struct cifs_unix_set_info_args *args = NULL; | |
1634 | ||
1635 | cFYI(1, ("setattr_unix on file %s attrs->ia_valid=0x%x", | |
1636 | direntry->d_name.name, attrs->ia_valid)); | |
1637 | ||
1638 | xid = GetXid(); | |
1639 | ||
1640 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) { | |
1641 | /* check if we have permission to change attrs */ | |
1642 | rc = inode_change_ok(inode, attrs); | |
1643 | if (rc < 0) | |
1644 | goto out; | |
1645 | else | |
1646 | rc = 0; | |
1647 | } | |
1648 | ||
1649 | full_path = build_path_from_dentry(direntry); | |
1650 | if (full_path == NULL) { | |
1651 | rc = -ENOMEM; | |
1652 | goto out; | |
1653 | } | |
1654 | ||
1655 | if ((attrs->ia_valid & ATTR_MTIME) || (attrs->ia_valid & ATTR_SIZE)) { | |
1656 | /* | |
1657 | Flush data before changing file size or changing the last | |
1658 | write time of the file on the server. If the | |
1659 | flush returns error, store it to report later and continue. | |
1660 | BB: This should be smarter. Why bother flushing pages that | |
1661 | will be truncated anyway? Also, should we error out here if | |
1662 | the flush returns error? | |
1663 | */ | |
1664 | rc = filemap_write_and_wait(inode->i_mapping); | |
1665 | if (rc != 0) { | |
1666 | cifsInode->write_behind_rc = rc; | |
1667 | rc = 0; | |
1668 | } | |
1669 | } | |
1670 | ||
1671 | if (attrs->ia_valid & ATTR_SIZE) { | |
1672 | rc = cifs_set_file_size(inode, attrs, xid, full_path); | |
1673 | if (rc != 0) | |
1674 | goto out; | |
1675 | } | |
1676 | ||
1677 | /* skip mode change if it's just for clearing setuid/setgid */ | |
1678 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) | |
1679 | attrs->ia_valid &= ~ATTR_MODE; | |
1680 | ||
1681 | args = kmalloc(sizeof(*args), GFP_KERNEL); | |
1682 | if (args == NULL) { | |
1683 | rc = -ENOMEM; | |
1684 | goto out; | |
1685 | } | |
1686 | ||
1687 | /* set up the struct */ | |
1688 | if (attrs->ia_valid & ATTR_MODE) | |
1689 | args->mode = attrs->ia_mode; | |
1690 | else | |
1691 | args->mode = NO_CHANGE_64; | |
1692 | ||
1693 | if (attrs->ia_valid & ATTR_UID) | |
1694 | args->uid = attrs->ia_uid; | |
1695 | else | |
1696 | args->uid = NO_CHANGE_64; | |
1697 | ||
1698 | if (attrs->ia_valid & ATTR_GID) | |
1699 | args->gid = attrs->ia_gid; | |
1700 | else | |
1701 | args->gid = NO_CHANGE_64; | |
1702 | ||
1703 | if (attrs->ia_valid & ATTR_ATIME) | |
1704 | args->atime = cifs_UnixTimeToNT(attrs->ia_atime); | |
1705 | else | |
1706 | args->atime = NO_CHANGE_64; | |
1707 | ||
1708 | if (attrs->ia_valid & ATTR_MTIME) | |
1709 | args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime); | |
1710 | else | |
1711 | args->mtime = NO_CHANGE_64; | |
1712 | ||
1713 | if (attrs->ia_valid & ATTR_CTIME) | |
1714 | args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime); | |
1715 | else | |
1716 | args->ctime = NO_CHANGE_64; | |
1717 | ||
1718 | args->device = 0; | |
1719 | rc = CIFSSMBUnixSetInfo(xid, pTcon, full_path, args, | |
1720 | cifs_sb->local_nls, | |
1721 | cifs_sb->mnt_cifs_flags & | |
1722 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1723 | ||
1724 | if (!rc) | |
1725 | rc = inode_setattr(inode, attrs); | |
1726 | out: | |
1727 | kfree(args); | |
1728 | kfree(full_path); | |
1729 | FreeXid(xid); | |
1730 | return rc; | |
1731 | } | |
1732 | ||
0510eeb7 JL |
1733 | static int |
1734 | cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs) | |
1da177e4 LT |
1735 | { |
1736 | int xid; | |
3fe5c1dd JL |
1737 | struct inode *inode = direntry->d_inode; |
1738 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
3fe5c1dd | 1739 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
1da177e4 LT |
1740 | char *full_path = NULL; |
1741 | int rc = -EACCES; | |
feb3e20c | 1742 | __u32 dosattr = 0; |
4e1e7fb9 | 1743 | __u64 mode = NO_CHANGE_64; |
3fe5c1dd | 1744 | |
1da177e4 LT |
1745 | xid = GetXid(); |
1746 | ||
3979877e | 1747 | cFYI(1, ("setattr on file %s attrs->iavalid 0x%x", |
1da177e4 | 1748 | direntry->d_name.name, attrs->ia_valid)); |
6473a559 | 1749 | |
2a138ebb | 1750 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) { |
6473a559 | 1751 | /* check if we have permission to change attrs */ |
02eadeff | 1752 | rc = inode_change_ok(inode, attrs); |
fb8c4b14 | 1753 | if (rc < 0) { |
6473a559 SF |
1754 | FreeXid(xid); |
1755 | return rc; | |
1756 | } else | |
1757 | rc = 0; | |
1758 | } | |
50c2f753 | 1759 | |
7f57356b | 1760 | full_path = build_path_from_dentry(direntry); |
1da177e4 LT |
1761 | if (full_path == NULL) { |
1762 | FreeXid(xid); | |
1763 | return -ENOMEM; | |
1764 | } | |
1da177e4 | 1765 | |
50531444 | 1766 | if ((attrs->ia_valid & ATTR_MTIME) || (attrs->ia_valid & ATTR_SIZE)) { |
cea21805 | 1767 | /* |
50531444 SF |
1768 | Flush data before changing file size or changing the last |
1769 | write time of the file on the server. If the | |
cea21805 JL |
1770 | flush returns error, store it to report later and continue. |
1771 | BB: This should be smarter. Why bother flushing pages that | |
1772 | will be truncated anyway? Also, should we error out here if | |
1773 | the flush returns error? | |
1774 | */ | |
02eadeff | 1775 | rc = filemap_write_and_wait(inode->i_mapping); |
cea21805 | 1776 | if (rc != 0) { |
02eadeff | 1777 | cifsInode->write_behind_rc = rc; |
cea21805 JL |
1778 | rc = 0; |
1779 | } | |
50531444 | 1780 | } |
cea21805 | 1781 | |
50531444 | 1782 | if (attrs->ia_valid & ATTR_SIZE) { |
8efdbde6 JL |
1783 | rc = cifs_set_file_size(inode, attrs, xid, full_path); |
1784 | if (rc != 0) | |
e30dcf3a | 1785 | goto cifs_setattr_exit; |
1da177e4 | 1786 | } |
4ca691a8 JL |
1787 | |
1788 | /* | |
1789 | * Without unix extensions we can't send ownership changes to the | |
1790 | * server, so silently ignore them. This is consistent with how | |
1791 | * local DOS/Windows filesystems behave (VFAT, NTFS, etc). With | |
1792 | * CIFSACL support + proper Windows to Unix idmapping, we may be | |
1793 | * able to support this in the future. | |
1794 | */ | |
3fe5c1dd | 1795 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) |
4ca691a8 | 1796 | attrs->ia_valid &= ~(ATTR_UID | ATTR_GID); |
1da177e4 | 1797 | |
d32c4f26 JL |
1798 | /* skip mode change if it's just for clearing setuid/setgid */ |
1799 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) | |
1800 | attrs->ia_valid &= ~ATTR_MODE; | |
1801 | ||
1da177e4 | 1802 | if (attrs->ia_valid & ATTR_MODE) { |
5132861a | 1803 | cFYI(1, ("Mode changed to 0%o", attrs->ia_mode)); |
1da177e4 | 1804 | mode = attrs->ia_mode; |
1da177e4 LT |
1805 | } |
1806 | ||
3fe5c1dd | 1807 | if (attrs->ia_valid & ATTR_MODE) { |
cdbce9c8 | 1808 | rc = 0; |
97837582 SF |
1809 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
1810 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) | |
02eadeff | 1811 | rc = mode_to_acl(inode, full_path, mode); |
5132861a | 1812 | else |
97837582 | 1813 | #endif |
5132861a JL |
1814 | if (((mode & S_IWUGO) == 0) && |
1815 | (cifsInode->cifsAttrs & ATTR_READONLY) == 0) { | |
feb3e20c JL |
1816 | |
1817 | dosattr = cifsInode->cifsAttrs | ATTR_READONLY; | |
1818 | ||
5132861a JL |
1819 | /* fix up mode if we're not using dynperm */ |
1820 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0) | |
1821 | attrs->ia_mode = inode->i_mode & ~S_IWUGO; | |
1822 | } else if ((mode & S_IWUGO) && | |
1823 | (cifsInode->cifsAttrs & ATTR_READONLY)) { | |
feb3e20c JL |
1824 | |
1825 | dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY; | |
1826 | /* Attributes of 0 are ignored */ | |
1827 | if (dosattr == 0) | |
1828 | dosattr |= ATTR_NORMAL; | |
5132861a JL |
1829 | |
1830 | /* reset local inode permissions to normal */ | |
1831 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { | |
1832 | attrs->ia_mode &= ~(S_IALLUGO); | |
1833 | if (S_ISDIR(inode->i_mode)) | |
1834 | attrs->ia_mode |= | |
1835 | cifs_sb->mnt_dir_mode; | |
1836 | else | |
1837 | attrs->ia_mode |= | |
1838 | cifs_sb->mnt_file_mode; | |
1839 | } | |
1840 | } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { | |
1841 | /* ignore mode change - ATTR_READONLY hasn't changed */ | |
1842 | attrs->ia_valid &= ~ATTR_MODE; | |
1da177e4 | 1843 | } |
1da177e4 LT |
1844 | } |
1845 | ||
feb3e20c JL |
1846 | if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) || |
1847 | ((attrs->ia_valid & ATTR_MODE) && dosattr)) { | |
1848 | rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); | |
1849 | /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */ | |
1da177e4 | 1850 | |
e30dcf3a SF |
1851 | /* Even if error on time set, no sense failing the call if |
1852 | the server would set the time to a reasonable value anyway, | |
1853 | and this check ensures that we are not being called from | |
1854 | sys_utimes in which case we ought to fail the call back to | |
1855 | the user when the server rejects the call */ | |
fb8c4b14 | 1856 | if ((rc) && (attrs->ia_valid & |
feb3e20c | 1857 | (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE))) |
e30dcf3a | 1858 | rc = 0; |
1da177e4 LT |
1859 | } |
1860 | ||
1861 | /* do not need local check to inode_check_ok since the server does | |
1862 | that */ | |
1863 | if (!rc) | |
02eadeff | 1864 | rc = inode_setattr(inode, attrs); |
e30dcf3a | 1865 | cifs_setattr_exit: |
1da177e4 LT |
1866 | kfree(full_path); |
1867 | FreeXid(xid); | |
1868 | return rc; | |
1869 | } | |
1870 | ||
0510eeb7 JL |
1871 | int |
1872 | cifs_setattr(struct dentry *direntry, struct iattr *attrs) | |
1873 | { | |
1874 | struct inode *inode = direntry->d_inode; | |
1875 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
1876 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
1877 | ||
1878 | if (pTcon->unix_ext) | |
1879 | return cifs_setattr_unix(direntry, attrs); | |
1880 | ||
1881 | return cifs_setattr_nounix(direntry, attrs); | |
1882 | ||
1883 | /* BB: add cifs_setattr_legacy for really old servers */ | |
1884 | } | |
1885 | ||
99ee4dbd | 1886 | #if 0 |
1da177e4 LT |
1887 | void cifs_delete_inode(struct inode *inode) |
1888 | { | |
26a21b98 | 1889 | cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode)); |
1da177e4 LT |
1890 | /* may have to add back in if and when safe distributed caching of |
1891 | directories added e.g. via FindNotify */ | |
1892 | } | |
99ee4dbd | 1893 | #endif |