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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/cifs/inode.c | |
3 | * | |
8be0ed44 | 4 | * Copyright (C) International Business Machines Corp., 2002,2008 |
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 | ||
07119a4d | 88 | inode->i_atime = cifs_NTtimeToUnix(info->LastAccessTime); |
75f12983 | 89 | inode->i_mtime = |
07119a4d JL |
90 | cifs_NTtimeToUnix(info->LastModificationTime); |
91 | inode->i_ctime = cifs_NTtimeToUnix(info->LastStatusChange); | |
75f12983 CH |
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 | ||
fbec9ab9 | 146 | cifsInfo->server_eof = end_of_file; |
75f12983 CH |
147 | spin_lock(&inode->i_lock); |
148 | if (is_size_safe_to_change(cifsInfo, end_of_file)) { | |
149 | /* | |
150 | * We can not safely change the file size here if the client | |
151 | * is writing to it due to potential races. | |
152 | */ | |
153 | i_size_write(inode, end_of_file); | |
154 | ||
155 | /* | |
156 | * i_blocks is not related to (i_size / i_blksize), | |
157 | * but instead 512 byte (2**9) size is required for | |
158 | * calculating num blocks. | |
159 | */ | |
160 | inode->i_blocks = (512 - 1 + num_of_bytes) >> 9; | |
161 | } | |
162 | spin_unlock(&inode->i_lock); | |
163 | } | |
164 | ||
b9a3260f SF |
165 | |
166 | /* | |
167 | * Needed to setup inode data for the directory which is the | |
168 | * junction to the new submount (ie to setup the fake directory | |
169 | * which represents a DFS referral) | |
170 | */ | |
0e4bbde9 SF |
171 | static void fill_fake_finddataunix(FILE_UNIX_BASIC_INFO *pfnd_dat, |
172 | struct super_block *sb) | |
173 | { | |
174 | struct inode *pinode = NULL; | |
175 | ||
0a891adc | 176 | memset(pfnd_dat, 0, sizeof(FILE_UNIX_BASIC_INFO)); |
0e4bbde9 SF |
177 | |
178 | /* __le64 pfnd_dat->EndOfFile = cpu_to_le64(0); | |
179 | __le64 pfnd_dat->NumOfBytes = cpu_to_le64(0); | |
180 | __u64 UniqueId = 0; */ | |
181 | pfnd_dat->LastStatusChange = | |
182 | cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); | |
183 | pfnd_dat->LastAccessTime = | |
184 | cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); | |
185 | pfnd_dat->LastModificationTime = | |
186 | cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); | |
187 | pfnd_dat->Type = cpu_to_le32(UNIX_DIR); | |
188 | pfnd_dat->Permissions = cpu_to_le64(S_IXUGO | S_IRWXU); | |
189 | pfnd_dat->Nlinks = cpu_to_le64(2); | |
190 | if (sb->s_root) | |
191 | pinode = sb->s_root->d_inode; | |
192 | if (pinode == NULL) | |
193 | return; | |
194 | ||
195 | /* fill in default values for the remaining based on root | |
196 | inode since we can not query the server for this inode info */ | |
197 | pfnd_dat->DevMajor = cpu_to_le64(MAJOR(pinode->i_rdev)); | |
198 | pfnd_dat->DevMinor = cpu_to_le64(MINOR(pinode->i_rdev)); | |
199 | pfnd_dat->Uid = cpu_to_le64(pinode->i_uid); | |
200 | pfnd_dat->Gid = cpu_to_le64(pinode->i_gid); | |
201 | } | |
202 | ||
132ac7b7 JL |
203 | /** |
204 | * cifs_new inode - create new inode, initialize, and hash it | |
205 | * @sb - pointer to superblock | |
206 | * @inum - if valid pointer and serverino is enabled, replace i_ino with val | |
207 | * | |
208 | * Create a new inode, initialize it for CIFS and hash it. Returns the new | |
209 | * inode or NULL if one couldn't be allocated. | |
210 | * | |
211 | * If the share isn't mounted with "serverino" or inum is a NULL pointer then | |
212 | * we'll just use the inode number assigned by new_inode(). Note that this can | |
213 | * mean i_ino collisions since the i_ino assigned by new_inode is not | |
214 | * guaranteed to be unique. | |
215 | */ | |
216 | struct inode * | |
950ec528 | 217 | cifs_new_inode(struct super_block *sb, __u64 *inum) |
132ac7b7 JL |
218 | { |
219 | struct inode *inode; | |
220 | ||
221 | inode = new_inode(sb); | |
222 | if (inode == NULL) | |
223 | return NULL; | |
224 | ||
225 | /* | |
226 | * BB: Is i_ino == 0 legal? Here, we assume that it is. If it isn't we | |
227 | * stop passing inum as ptr. Are there sanity checks we can use to | |
228 | * ensure that the server is really filling in that field? Also, | |
229 | * if serverino is disabled, perhaps we should be using iunique()? | |
230 | */ | |
231 | if (inum && (CIFS_SB(sb)->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) | |
950ec528 | 232 | inode->i_ino = (unsigned long) *inum; |
132ac7b7 JL |
233 | |
234 | /* | |
235 | * must set this here instead of cifs_alloc_inode since VFS will | |
236 | * clobber i_flags | |
237 | */ | |
238 | if (sb->s_flags & MS_NOATIME) | |
239 | inode->i_flags |= S_NOATIME | S_NOCMTIME; | |
240 | ||
241 | insert_inode_hash(inode); | |
242 | ||
243 | return inode; | |
244 | } | |
245 | ||
1da177e4 | 246 | int cifs_get_inode_info_unix(struct inode **pinode, |
646dd539 | 247 | const unsigned char *full_path, struct super_block *sb, int xid) |
1da177e4 LT |
248 | { |
249 | int rc = 0; | |
0e4bbde9 | 250 | FILE_UNIX_BASIC_INFO find_data; |
1da177e4 LT |
251 | struct cifsTconInfo *pTcon; |
252 | struct inode *inode; | |
253 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
7962670e | 254 | bool is_dfs_referral = false; |
0e4bbde9 SF |
255 | struct cifsInodeInfo *cifsInfo; |
256 | __u64 num_of_bytes; | |
257 | __u64 end_of_file; | |
1da177e4 LT |
258 | |
259 | pTcon = cifs_sb->tcon; | |
646dd539 | 260 | cFYI(1, ("Getting info on %s", full_path)); |
7962670e | 261 | |
1da177e4 | 262 | /* could have done a find first instead but this returns more info */ |
0e4bbde9 | 263 | rc = CIFSSMBUnixQPathInfo(xid, pTcon, full_path, &find_data, |
737b758c SF |
264 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
265 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
e911d0cc JL |
266 | if (rc == -EREMOTE && !is_dfs_referral) { |
267 | is_dfs_referral = true; | |
268 | cFYI(DBG2, ("DFS ref")); | |
269 | /* for DFS, server does not give us real inode data */ | |
270 | fill_fake_finddataunix(&find_data, sb); | |
271 | rc = 0; | |
272 | } else if (rc) | |
273 | goto cgiiu_exit; | |
274 | ||
0e4bbde9 SF |
275 | num_of_bytes = le64_to_cpu(find_data.NumOfBytes); |
276 | end_of_file = le64_to_cpu(find_data.EndOfFile); | |
1da177e4 | 277 | |
0e4bbde9 SF |
278 | /* get new inode */ |
279 | if (*pinode == NULL) { | |
85a6dac5 SF |
280 | __u64 unique_id = le64_to_cpu(find_data.UniqueId); |
281 | *pinode = cifs_new_inode(sb, &unique_id); | |
1da177e4 | 282 | if (*pinode == NULL) { |
0e4bbde9 | 283 | rc = -ENOMEM; |
e911d0cc | 284 | goto cgiiu_exit; |
1da177e4 | 285 | } |
0e4bbde9 | 286 | } |
1da177e4 | 287 | |
0e4bbde9 SF |
288 | inode = *pinode; |
289 | cifsInfo = CIFS_I(inode); | |
1da177e4 | 290 | |
0e4bbde9 SF |
291 | cFYI(1, ("Old time %ld", cifsInfo->time)); |
292 | cifsInfo->time = jiffies; | |
293 | cFYI(1, ("New time %ld", cifsInfo->time)); | |
294 | /* this is ok to set on every inode revalidate */ | |
295 | atomic_set(&cifsInfo->inUse, 1); | |
1da177e4 | 296 | |
0e4bbde9 | 297 | cifs_unix_info_to_inode(inode, &find_data, 0); |
70eff55d | 298 | |
0e4bbde9 SF |
299 | if (num_of_bytes < end_of_file) |
300 | cFYI(1, ("allocation size less than end of file")); | |
301 | cFYI(1, ("Size %ld and blocks %llu", | |
302 | (unsigned long) inode->i_size, | |
303 | (unsigned long long)inode->i_blocks)); | |
304 | ||
305 | cifs_set_ops(inode, is_dfs_referral); | |
7962670e | 306 | cgiiu_exit: |
1da177e4 LT |
307 | return rc; |
308 | } | |
309 | ||
fb8c4b14 | 310 | static int decode_sfu_inode(struct inode *inode, __u64 size, |
d6e2f2a4 SF |
311 | const unsigned char *path, |
312 | struct cifs_sb_info *cifs_sb, int xid) | |
313 | { | |
314 | int rc; | |
4b18f2a9 | 315 | int oplock = 0; |
d6e2f2a4 SF |
316 | __u16 netfid; |
317 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
86c96b4b | 318 | char buf[24]; |
d6e2f2a4 | 319 | unsigned int bytes_read; |
fb8c4b14 | 320 | char *pbuf; |
d6e2f2a4 SF |
321 | |
322 | pbuf = buf; | |
323 | ||
4523cc30 | 324 | if (size == 0) { |
d6e2f2a4 SF |
325 | inode->i_mode |= S_IFIFO; |
326 | return 0; | |
327 | } else if (size < 8) { | |
328 | return -EINVAL; /* EOPNOTSUPP? */ | |
329 | } | |
50c2f753 | 330 | |
d6e2f2a4 SF |
331 | rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ, |
332 | CREATE_NOT_DIR, &netfid, &oplock, NULL, | |
333 | cifs_sb->local_nls, | |
334 | cifs_sb->mnt_cifs_flags & | |
335 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
fb8c4b14 | 336 | if (rc == 0) { |
ec637e3f | 337 | int buf_type = CIFS_NO_BUFFER; |
d6e2f2a4 SF |
338 | /* Read header */ |
339 | rc = CIFSSMBRead(xid, pTcon, | |
fb8c4b14 | 340 | netfid, |
86c96b4b | 341 | 24 /* length */, 0 /* offset */, |
ec637e3f | 342 | &bytes_read, &pbuf, &buf_type); |
4523cc30 SF |
343 | if ((rc == 0) && (bytes_read >= 8)) { |
344 | if (memcmp("IntxBLK", pbuf, 8) == 0) { | |
fb8c4b14 | 345 | cFYI(1, ("Block device")); |
3020a1f5 | 346 | inode->i_mode |= S_IFBLK; |
4523cc30 | 347 | if (bytes_read == 24) { |
86c96b4b SF |
348 | /* we have enough to decode dev num */ |
349 | __u64 mjr; /* major */ | |
350 | __u64 mnr; /* minor */ | |
351 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); | |
352 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); | |
353 | inode->i_rdev = MKDEV(mjr, mnr); | |
354 | } | |
4523cc30 | 355 | } else if (memcmp("IntxCHR", pbuf, 8) == 0) { |
fb8c4b14 | 356 | cFYI(1, ("Char device")); |
3020a1f5 | 357 | inode->i_mode |= S_IFCHR; |
4523cc30 | 358 | if (bytes_read == 24) { |
86c96b4b SF |
359 | /* we have enough to decode dev num */ |
360 | __u64 mjr; /* major */ | |
361 | __u64 mnr; /* minor */ | |
362 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); | |
363 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); | |
364 | inode->i_rdev = MKDEV(mjr, mnr); | |
fb8c4b14 | 365 | } |
4523cc30 | 366 | } else if (memcmp("IntxLNK", pbuf, 7) == 0) { |
fb8c4b14 | 367 | cFYI(1, ("Symlink")); |
3020a1f5 | 368 | inode->i_mode |= S_IFLNK; |
86c96b4b SF |
369 | } else { |
370 | inode->i_mode |= S_IFREG; /* file? */ | |
fb8c4b14 | 371 | rc = -EOPNOTSUPP; |
86c96b4b | 372 | } |
3020a1f5 SF |
373 | } else { |
374 | inode->i_mode |= S_IFREG; /* then it is a file */ | |
fb8c4b14 SF |
375 | rc = -EOPNOTSUPP; /* or some unknown SFU type */ |
376 | } | |
d6e2f2a4 | 377 | CIFSSMBClose(xid, pTcon, netfid); |
d6e2f2a4 SF |
378 | } |
379 | return rc; | |
d6e2f2a4 SF |
380 | } |
381 | ||
9e294f1c SF |
382 | #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */ |
383 | ||
953f8681 | 384 | static int get_sfu_mode(struct inode *inode, |
9e294f1c SF |
385 | const unsigned char *path, |
386 | struct cifs_sb_info *cifs_sb, int xid) | |
387 | { | |
3020a1f5 | 388 | #ifdef CONFIG_CIFS_XATTR |
9e294f1c SF |
389 | ssize_t rc; |
390 | char ea_value[4]; | |
391 | __u32 mode; | |
392 | ||
393 | rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS", | |
394 | ea_value, 4 /* size of buf */, cifs_sb->local_nls, | |
fb8c4b14 | 395 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
4523cc30 | 396 | if (rc < 0) |
9e294f1c SF |
397 | return (int)rc; |
398 | else if (rc > 3) { | |
399 | mode = le32_to_cpu(*((__le32 *)ea_value)); | |
fb8c4b14 SF |
400 | inode->i_mode &= ~SFBITS_MASK; |
401 | cFYI(1, ("special bits 0%o org mode 0%o", mode, inode->i_mode)); | |
9e294f1c | 402 | inode->i_mode = (mode & SFBITS_MASK) | inode->i_mode; |
fb8c4b14 | 403 | cFYI(1, ("special mode bits 0%o", mode)); |
9e294f1c SF |
404 | return 0; |
405 | } else { | |
406 | return 0; | |
407 | } | |
3020a1f5 SF |
408 | #else |
409 | return -EOPNOTSUPP; | |
410 | #endif | |
9e294f1c SF |
411 | } |
412 | ||
b9a3260f SF |
413 | /* |
414 | * Needed to setup inode data for the directory which is the | |
415 | * junction to the new submount (ie to setup the fake directory | |
416 | * which represents a DFS referral) | |
417 | */ | |
418 | static void fill_fake_finddata(FILE_ALL_INFO *pfnd_dat, | |
419 | struct super_block *sb) | |
420 | { | |
0a891adc | 421 | memset(pfnd_dat, 0, sizeof(FILE_ALL_INFO)); |
b9a3260f SF |
422 | |
423 | /* __le64 pfnd_dat->AllocationSize = cpu_to_le64(0); | |
424 | __le64 pfnd_dat->EndOfFile = cpu_to_le64(0); | |
425 | __u8 pfnd_dat->DeletePending = 0; | |
426 | __u8 pfnd_data->Directory = 0; | |
427 | __le32 pfnd_dat->EASize = 0; | |
428 | __u64 pfnd_dat->IndexNumber = 0; | |
429 | __u64 pfnd_dat->IndexNumber1 = 0; */ | |
430 | pfnd_dat->CreationTime = | |
431 | cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); | |
432 | pfnd_dat->LastAccessTime = | |
433 | cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); | |
434 | pfnd_dat->LastWriteTime = | |
435 | cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); | |
436 | pfnd_dat->ChangeTime = | |
437 | cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); | |
438 | pfnd_dat->Attributes = cpu_to_le32(ATTR_DIRECTORY); | |
439 | pfnd_dat->NumberOfLinks = cpu_to_le32(2); | |
440 | } | |
441 | ||
1da177e4 | 442 | int cifs_get_inode_info(struct inode **pinode, |
646dd539 | 443 | const unsigned char *full_path, FILE_ALL_INFO *pfindData, |
8b1327f6 | 444 | struct super_block *sb, int xid, const __u16 *pfid) |
1da177e4 LT |
445 | { |
446 | int rc = 0; | |
b9a3260f SF |
447 | __u32 attr; |
448 | struct cifsInodeInfo *cifsInfo; | |
1da177e4 LT |
449 | struct cifsTconInfo *pTcon; |
450 | struct inode *inode; | |
451 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
1da177e4 | 452 | char *buf = NULL; |
5ade9dea | 453 | bool adjustTZ = false; |
7962670e | 454 | bool is_dfs_referral = false; |
4468eb3f | 455 | umode_t default_mode; |
1da177e4 LT |
456 | |
457 | pTcon = cifs_sb->tcon; | |
646dd539 | 458 | cFYI(1, ("Getting info on %s", full_path)); |
1da177e4 | 459 | |
d0d2f2df SF |
460 | if ((pfindData == NULL) && (*pinode != NULL)) { |
461 | if (CIFS_I(*pinode)->clientCanCacheRead) { | |
fb8c4b14 | 462 | cFYI(1, ("No need to revalidate cached inode sizes")); |
1da177e4 LT |
463 | return rc; |
464 | } | |
465 | } | |
466 | ||
467 | /* if file info not passed in then get it from server */ | |
d0d2f2df | 468 | if (pfindData == NULL) { |
1da177e4 | 469 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
d0d2f2df | 470 | if (buf == NULL) |
1da177e4 LT |
471 | return -ENOMEM; |
472 | pfindData = (FILE_ALL_INFO *)buf; | |
7962670e | 473 | |
1da177e4 | 474 | /* could do find first instead but this returns more info */ |
7962670e | 475 | rc = CIFSSMBQPathInfo(xid, pTcon, full_path, pfindData, |
acf1a1b1 | 476 | 0 /* not legacy */, |
6b8edfe0 | 477 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
737b758c | 478 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
6b8edfe0 SF |
479 | /* BB optimize code so we do not make the above call |
480 | when server claims no NT SMB support and the above call | |
481 | failed at least once - set flag in tcon or mount */ | |
4523cc30 | 482 | if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) { |
7962670e | 483 | rc = SMBQueryInformation(xid, pTcon, full_path, |
fb8c4b14 | 484 | pfindData, cifs_sb->local_nls, |
6b8edfe0 SF |
485 | cifs_sb->mnt_cifs_flags & |
486 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
4b18f2a9 | 487 | adjustTZ = true; |
6b8edfe0 | 488 | } |
1da177e4 LT |
489 | } |
490 | /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */ | |
b9a3260f SF |
491 | if (rc == -EREMOTE) { |
492 | is_dfs_referral = true; | |
493 | fill_fake_finddata(pfindData, sb); | |
494 | rc = 0; | |
495 | } else if (rc) | |
7962670e | 496 | goto cgii_exit; |
1da177e4 | 497 | |
b9a3260f SF |
498 | attr = le32_to_cpu(pfindData->Attributes); |
499 | ||
500 | /* get new inode */ | |
501 | if (*pinode == NULL) { | |
132ac7b7 | 502 | __u64 inode_num; |
950ec528 | 503 | __u64 *pinum = &inode_num; |
132ac7b7 | 504 | |
b9a3260f SF |
505 | /* Is an i_ino of zero legal? Can we use that to check |
506 | if the server supports returning inode numbers? Are | |
507 | there other sanity checks we can use to ensure that | |
508 | the server is really filling in that field? */ | |
509 | ||
510 | /* We can not use the IndexNumber field by default from | |
511 | Windows or Samba (in ALL_INFO buf) but we can request | |
512 | it explicitly. It may not be unique presumably if | |
513 | the server has multiple devices mounted under one share */ | |
514 | ||
515 | /* There may be higher info levels that work but are | |
516 | there Windows server or network appliances for which | |
517 | IndexNumber field is not guaranteed unique? */ | |
518 | ||
519 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { | |
520 | int rc1 = 0; | |
b9a3260f SF |
521 | |
522 | rc1 = CIFSGetSrvInodeNumber(xid, pTcon, | |
950ec528 | 523 | full_path, pinum, |
737b758c SF |
524 | cifs_sb->local_nls, |
525 | cifs_sb->mnt_cifs_flags & | |
526 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
b9a3260f SF |
527 | if (rc1) { |
528 | cFYI(1, ("GetSrvInodeNum rc %d", rc1)); | |
950ec528 | 529 | pinum = NULL; |
b9a3260f | 530 | /* BB EOPNOSUPP disable SERVER_INUM? */ |
132ac7b7 | 531 | } |
132ac7b7 | 532 | } else { |
950ec528 | 533 | pinum = NULL; |
132ac7b7 JL |
534 | } |
535 | ||
950ec528 | 536 | *pinode = cifs_new_inode(sb, pinum); |
132ac7b7 JL |
537 | if (*pinode == NULL) { |
538 | rc = -ENOMEM; | |
539 | goto cgii_exit; | |
540 | } | |
b9a3260f SF |
541 | } |
542 | inode = *pinode; | |
543 | cifsInfo = CIFS_I(inode); | |
544 | cifsInfo->cifsAttrs = attr; | |
9a8165fc | 545 | cifsInfo->delete_pending = pfindData->DeletePending ? true : false; |
b9a3260f SF |
546 | cFYI(1, ("Old time %ld", cifsInfo->time)); |
547 | cifsInfo->time = jiffies; | |
548 | cFYI(1, ("New time %ld", cifsInfo->time)); | |
549 | ||
550 | /* blksize needs to be multiple of two. So safer to default to | |
551 | blksize and blkbits set in superblock so 2**blkbits and blksize | |
552 | will match rather than setting to: | |
553 | (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/ | |
554 | ||
555 | /* Linux can not store file creation time so ignore it */ | |
556 | if (pfindData->LastAccessTime) | |
07119a4d | 557 | inode->i_atime = cifs_NTtimeToUnix(pfindData->LastAccessTime); |
b9a3260f SF |
558 | else /* do not need to use current_fs_time - time not stored */ |
559 | inode->i_atime = CURRENT_TIME; | |
07119a4d JL |
560 | inode->i_mtime = cifs_NTtimeToUnix(pfindData->LastWriteTime); |
561 | inode->i_ctime = cifs_NTtimeToUnix(pfindData->ChangeTime); | |
b9a3260f SF |
562 | cFYI(DBG2, ("Attributes came in as 0x%x", attr)); |
563 | if (adjustTZ && (pTcon->ses) && (pTcon->ses->server)) { | |
564 | inode->i_ctime.tv_sec += pTcon->ses->server->timeAdj; | |
565 | inode->i_mtime.tv_sec += pTcon->ses->server->timeAdj; | |
566 | } | |
1da177e4 | 567 | |
4468eb3f JL |
568 | /* get default inode mode */ |
569 | if (attr & ATTR_DIRECTORY) | |
570 | default_mode = cifs_sb->mnt_dir_mode; | |
571 | else | |
572 | default_mode = cifs_sb->mnt_file_mode; | |
573 | ||
574 | /* set permission bits */ | |
575 | if (atomic_read(&cifsInfo->inUse) == 0 || | |
576 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0) | |
577 | inode->i_mode = default_mode; | |
578 | else { | |
579 | /* just reenable write bits if !ATTR_READONLY */ | |
580 | if ((inode->i_mode & S_IWUGO) == 0 && | |
581 | (attr & ATTR_READONLY) == 0) | |
582 | inode->i_mode |= (S_IWUGO & default_mode); | |
aab3a8c7 IJ |
583 | |
584 | inode->i_mode &= ~S_IFMT; | |
4468eb3f JL |
585 | } |
586 | /* clear write bits if ATTR_READONLY is set */ | |
587 | if (attr & ATTR_READONLY) | |
588 | inode->i_mode &= ~S_IWUGO; | |
589 | ||
590 | /* set inode type */ | |
591 | if ((attr & ATTR_SYSTEM) && | |
592 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) { | |
593 | /* no need to fix endianness on 0 */ | |
594 | if (pfindData->EndOfFile == 0) | |
595 | inode->i_mode |= S_IFIFO; | |
596 | else if (decode_sfu_inode(inode, | |
597 | le64_to_cpu(pfindData->EndOfFile), | |
598 | full_path, cifs_sb, xid)) | |
599 | cFYI(1, ("unknown SFU file type\n")); | |
b9a3260f | 600 | } else { |
4468eb3f JL |
601 | if (attr & ATTR_DIRECTORY) |
602 | inode->i_mode |= S_IFDIR; | |
603 | else | |
604 | inode->i_mode |= S_IFREG; | |
b9a3260f SF |
605 | } |
606 | ||
fbec9ab9 | 607 | cifsInfo->server_eof = le64_to_cpu(pfindData->EndOfFile); |
b9a3260f | 608 | spin_lock(&inode->i_lock); |
fbec9ab9 | 609 | if (is_size_safe_to_change(cifsInfo, cifsInfo->server_eof)) { |
b9a3260f SF |
610 | /* can not safely shrink the file size here if the |
611 | client is writing to it due to potential races */ | |
fbec9ab9 | 612 | i_size_write(inode, cifsInfo->server_eof); |
b9a3260f SF |
613 | |
614 | /* 512 bytes (2**9) is the fake blocksize that must be | |
615 | used for this calculation */ | |
616 | inode->i_blocks = (512 - 1 + le64_to_cpu( | |
617 | pfindData->AllocationSize)) >> 9; | |
618 | } | |
619 | spin_unlock(&inode->i_lock); | |
1da177e4 | 620 | |
b9a3260f | 621 | inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks); |
1da177e4 | 622 | |
b9a3260f SF |
623 | /* BB fill in uid and gid here? with help from winbind? |
624 | or retrieve from NTFS stream extended attribute */ | |
4879b448 | 625 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
b9a3260f SF |
626 | /* fill in 0777 bits from ACL */ |
627 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { | |
628 | cFYI(1, ("Getting mode bits from ACL")); | |
1bf4072d | 629 | acl_to_uid_mode(cifs_sb, inode, full_path, pfid); |
b9a3260f | 630 | } |
4879b448 | 631 | #endif |
b9a3260f SF |
632 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { |
633 | /* fill in remaining high mode bits e.g. SUID, VTX */ | |
634 | get_sfu_mode(inode, full_path, cifs_sb, xid); | |
635 | } else if (atomic_read(&cifsInfo->inUse) == 0) { | |
636 | inode->i_uid = cifs_sb->mnt_uid; | |
637 | inode->i_gid = cifs_sb->mnt_gid; | |
638 | /* set so we do not keep refreshing these fields with | |
639 | bad data after user has changed them in memory */ | |
640 | atomic_set(&cifsInfo->inUse, 1); | |
1da177e4 | 641 | } |
b9a3260f SF |
642 | |
643 | cifs_set_ops(inode, is_dfs_referral); | |
644 | ||
645 | ||
646 | ||
647 | ||
7962670e | 648 | cgii_exit: |
1da177e4 LT |
649 | kfree(buf); |
650 | return rc; | |
651 | } | |
652 | ||
7f8ed420 SF |
653 | static const struct inode_operations cifs_ipc_inode_ops = { |
654 | .lookup = cifs_lookup, | |
655 | }; | |
656 | ||
e4cce94c | 657 | char *cifs_build_path_to_root(struct cifs_sb_info *cifs_sb) |
8be0ed44 SF |
658 | { |
659 | int pplen = cifs_sb->prepathlen; | |
660 | int dfsplen; | |
661 | char *full_path = NULL; | |
662 | ||
663 | /* if no prefix path, simply set path to the root of share to "" */ | |
664 | if (pplen == 0) { | |
665 | full_path = kmalloc(1, GFP_KERNEL); | |
666 | if (full_path) | |
667 | full_path[0] = 0; | |
668 | return full_path; | |
669 | } | |
670 | ||
671 | if (cifs_sb->tcon && (cifs_sb->tcon->Flags & SMB_SHARE_IS_IN_DFS)) | |
672 | dfsplen = strnlen(cifs_sb->tcon->treeName, MAX_TREE_SIZE + 1); | |
673 | else | |
674 | dfsplen = 0; | |
675 | ||
676 | full_path = kmalloc(dfsplen + pplen + 1, GFP_KERNEL); | |
677 | if (full_path == NULL) | |
678 | return full_path; | |
679 | ||
680 | if (dfsplen) { | |
681 | strncpy(full_path, cifs_sb->tcon->treeName, dfsplen); | |
682 | /* switch slash direction in prepath depending on whether | |
683 | * windows or posix style path names | |
684 | */ | |
685 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) { | |
686 | int i; | |
687 | for (i = 0; i < dfsplen; i++) { | |
688 | if (full_path[i] == '\\') | |
689 | full_path[i] = '/'; | |
690 | } | |
691 | } | |
692 | } | |
693 | strncpy(full_path + dfsplen, cifs_sb->prepath, pplen); | |
694 | full_path[dfsplen + pplen] = 0; /* add trailing null */ | |
695 | return full_path; | |
696 | } | |
697 | ||
1da177e4 | 698 | /* gets root inode */ |
bd433d4c | 699 | struct inode *cifs_root_iget(struct super_block *sb, unsigned long ino) |
1da177e4 | 700 | { |
ce634ab2 | 701 | int xid; |
1da177e4 | 702 | struct cifs_sb_info *cifs_sb; |
ce634ab2 DH |
703 | struct inode *inode; |
704 | long rc; | |
8be0ed44 | 705 | char *full_path; |
ce634ab2 DH |
706 | |
707 | inode = iget_locked(sb, ino); | |
708 | if (!inode) | |
709 | return ERR_PTR(-ENOMEM); | |
710 | if (!(inode->i_state & I_NEW)) | |
711 | return inode; | |
1da177e4 LT |
712 | |
713 | cifs_sb = CIFS_SB(inode->i_sb); | |
e4cce94c | 714 | full_path = cifs_build_path_to_root(cifs_sb); |
8be0ed44 SF |
715 | if (full_path == NULL) |
716 | return ERR_PTR(-ENOMEM); | |
c18c842b | 717 | |
8be0ed44 | 718 | xid = GetXid(); |
c18c842b | 719 | if (cifs_sb->tcon->unix_ext) |
8be0ed44 SF |
720 | rc = cifs_get_inode_info_unix(&inode, full_path, inode->i_sb, |
721 | xid); | |
1da177e4 | 722 | else |
8be0ed44 SF |
723 | rc = cifs_get_inode_info(&inode, full_path, NULL, inode->i_sb, |
724 | xid, NULL); | |
7f8ed420 SF |
725 | if (rc && cifs_sb->tcon->ipc) { |
726 | cFYI(1, ("ipc connection - fake read inode")); | |
727 | inode->i_mode |= S_IFDIR; | |
728 | inode->i_nlink = 2; | |
729 | inode->i_op = &cifs_ipc_inode_ops; | |
730 | inode->i_fop = &simple_dir_operations; | |
731 | inode->i_uid = cifs_sb->mnt_uid; | |
732 | inode->i_gid = cifs_sb->mnt_gid; | |
ad661334 | 733 | } else if (rc) { |
8be0ed44 | 734 | kfree(full_path); |
ce634ab2 DH |
735 | _FreeXid(xid); |
736 | iget_failed(inode); | |
737 | return ERR_PTR(rc); | |
7f8ed420 SF |
738 | } |
739 | ||
ce634ab2 DH |
740 | unlock_new_inode(inode); |
741 | ||
8be0ed44 | 742 | kfree(full_path); |
ce634ab2 DH |
743 | /* can not call macro FreeXid here since in a void func |
744 | * TODO: This is no longer true | |
745 | */ | |
1da177e4 | 746 | _FreeXid(xid); |
ce634ab2 | 747 | return inode; |
1da177e4 LT |
748 | } |
749 | ||
388e57b2 SF |
750 | static int |
751 | cifs_set_file_info(struct inode *inode, struct iattr *attrs, int xid, | |
752 | char *full_path, __u32 dosattr) | |
753 | { | |
754 | int rc; | |
755 | int oplock = 0; | |
756 | __u16 netfid; | |
757 | __u32 netpid; | |
758 | bool set_time = false; | |
759 | struct cifsFileInfo *open_file; | |
760 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); | |
761 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
762 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
763 | FILE_BASIC_INFO info_buf; | |
764 | ||
1adcb710 SF |
765 | if (attrs == NULL) |
766 | return -EINVAL; | |
767 | ||
388e57b2 SF |
768 | if (attrs->ia_valid & ATTR_ATIME) { |
769 | set_time = true; | |
770 | info_buf.LastAccessTime = | |
771 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime)); | |
772 | } else | |
773 | info_buf.LastAccessTime = 0; | |
774 | ||
775 | if (attrs->ia_valid & ATTR_MTIME) { | |
776 | set_time = true; | |
777 | info_buf.LastWriteTime = | |
778 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime)); | |
779 | } else | |
780 | info_buf.LastWriteTime = 0; | |
781 | ||
782 | /* | |
783 | * Samba throws this field away, but windows may actually use it. | |
784 | * Do not set ctime unless other time stamps are changed explicitly | |
785 | * (i.e. by utimes()) since we would then have a mix of client and | |
786 | * server times. | |
787 | */ | |
788 | if (set_time && (attrs->ia_valid & ATTR_CTIME)) { | |
789 | cFYI(1, ("CIFS - CTIME changed")); | |
790 | info_buf.ChangeTime = | |
791 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime)); | |
792 | } else | |
793 | info_buf.ChangeTime = 0; | |
794 | ||
795 | info_buf.CreationTime = 0; /* don't change */ | |
796 | info_buf.Attributes = cpu_to_le32(dosattr); | |
797 | ||
798 | /* | |
799 | * If the file is already open for write, just use that fileid | |
800 | */ | |
801 | open_file = find_writable_file(cifsInode); | |
802 | if (open_file) { | |
803 | netfid = open_file->netfid; | |
804 | netpid = open_file->pid; | |
805 | goto set_via_filehandle; | |
806 | } | |
807 | ||
808 | /* | |
809 | * NT4 apparently returns success on this call, but it doesn't | |
810 | * really work. | |
811 | */ | |
812 | if (!(pTcon->ses->flags & CIFS_SES_NT4)) { | |
813 | rc = CIFSSMBSetPathInfo(xid, pTcon, full_path, | |
814 | &info_buf, cifs_sb->local_nls, | |
815 | cifs_sb->mnt_cifs_flags & | |
816 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
6b37faa1 JL |
817 | if (rc == 0) { |
818 | cifsInode->cifsAttrs = dosattr; | |
819 | goto out; | |
820 | } else if (rc != -EOPNOTSUPP && rc != -EINVAL) | |
388e57b2 SF |
821 | goto out; |
822 | } | |
823 | ||
824 | cFYI(1, ("calling SetFileInfo since SetPathInfo for " | |
825 | "times not supported by this server")); | |
826 | rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, | |
827 | SYNCHRONIZE | FILE_WRITE_ATTRIBUTES, | |
828 | CREATE_NOT_DIR, &netfid, &oplock, | |
829 | NULL, cifs_sb->local_nls, | |
830 | cifs_sb->mnt_cifs_flags & | |
831 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
832 | ||
833 | if (rc != 0) { | |
834 | if (rc == -EIO) | |
835 | rc = -EINVAL; | |
836 | goto out; | |
837 | } | |
838 | ||
839 | netpid = current->tgid; | |
840 | ||
841 | set_via_filehandle: | |
842 | rc = CIFSSMBSetFileInfo(xid, pTcon, &info_buf, netfid, netpid); | |
d388908e SF |
843 | if (!rc) |
844 | cifsInode->cifsAttrs = dosattr; | |
845 | ||
388e57b2 SF |
846 | if (open_file == NULL) |
847 | CIFSSMBClose(xid, pTcon, netfid); | |
848 | else | |
849 | atomic_dec(&open_file->wrtPending); | |
850 | out: | |
851 | return rc; | |
852 | } | |
853 | ||
a12a1ac7 JL |
854 | /* |
855 | * open the given file (if it isn't already), set the DELETE_ON_CLOSE bit | |
856 | * and rename it to a random name that hopefully won't conflict with | |
857 | * anything else. | |
858 | */ | |
859 | static int | |
3270958b | 860 | cifs_rename_pending_delete(char *full_path, struct dentry *dentry, int xid) |
a12a1ac7 JL |
861 | { |
862 | int oplock = 0; | |
863 | int rc; | |
864 | __u16 netfid; | |
3270958b | 865 | struct inode *inode = dentry->d_inode; |
a12a1ac7 JL |
866 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
867 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
868 | struct cifsTconInfo *tcon = cifs_sb->tcon; | |
3270958b SF |
869 | __u32 dosattr, origattr; |
870 | FILE_BASIC_INFO *info_buf = NULL; | |
a12a1ac7 JL |
871 | |
872 | rc = CIFSSMBOpen(xid, tcon, full_path, FILE_OPEN, | |
dd1db2de | 873 | DELETE|FILE_WRITE_ATTRIBUTES, CREATE_NOT_DIR, |
a12a1ac7 JL |
874 | &netfid, &oplock, NULL, cifs_sb->local_nls, |
875 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
876 | if (rc != 0) | |
877 | goto out; | |
878 | ||
3270958b SF |
879 | origattr = cifsInode->cifsAttrs; |
880 | if (origattr == 0) | |
881 | origattr |= ATTR_NORMAL; | |
882 | ||
883 | dosattr = origattr & ~ATTR_READONLY; | |
a12a1ac7 JL |
884 | if (dosattr == 0) |
885 | dosattr |= ATTR_NORMAL; | |
886 | dosattr |= ATTR_HIDDEN; | |
887 | ||
3270958b SF |
888 | /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */ |
889 | if (dosattr != origattr) { | |
890 | info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL); | |
891 | if (info_buf == NULL) { | |
892 | rc = -ENOMEM; | |
893 | goto out_close; | |
894 | } | |
895 | info_buf->Attributes = cpu_to_le32(dosattr); | |
896 | rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid, | |
897 | current->tgid); | |
898 | /* although we would like to mark the file hidden | |
899 | if that fails we will still try to rename it */ | |
41346098 | 900 | if (rc != 0) |
3270958b SF |
901 | cifsInode->cifsAttrs = dosattr; |
902 | else | |
903 | dosattr = origattr; /* since not able to change them */ | |
a12a1ac7 | 904 | } |
a12a1ac7 | 905 | |
dd1db2de JL |
906 | /* rename the file */ |
907 | rc = CIFSSMBRenameOpenFile(xid, tcon, netfid, NULL, cifs_sb->local_nls, | |
a12a1ac7 JL |
908 | cifs_sb->mnt_cifs_flags & |
909 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
3270958b SF |
910 | if (rc != 0) { |
911 | rc = -ETXTBSY; | |
912 | goto undo_setattr; | |
913 | } | |
6d22f098 | 914 | |
3270958b SF |
915 | /* try to set DELETE_ON_CLOSE */ |
916 | if (!cifsInode->delete_pending) { | |
917 | rc = CIFSSMBSetFileDisposition(xid, tcon, true, netfid, | |
918 | current->tgid); | |
919 | /* | |
920 | * some samba versions return -ENOENT when we try to set the | |
921 | * file disposition here. Likely a samba bug, but work around | |
922 | * it for now. This means that some cifsXXX files may hang | |
923 | * around after they shouldn't. | |
924 | * | |
925 | * BB: remove this hack after more servers have the fix | |
926 | */ | |
927 | if (rc == -ENOENT) | |
928 | rc = 0; | |
929 | else if (rc != 0) { | |
930 | rc = -ETXTBSY; | |
931 | goto undo_rename; | |
932 | } | |
933 | cifsInode->delete_pending = true; | |
934 | } | |
7ce86d5a | 935 | |
a12a1ac7 JL |
936 | out_close: |
937 | CIFSSMBClose(xid, tcon, netfid); | |
938 | out: | |
3270958b | 939 | kfree(info_buf); |
a12a1ac7 | 940 | return rc; |
3270958b SF |
941 | |
942 | /* | |
943 | * reset everything back to the original state. Don't bother | |
944 | * dealing with errors here since we can't do anything about | |
945 | * them anyway. | |
946 | */ | |
947 | undo_rename: | |
948 | CIFSSMBRenameOpenFile(xid, tcon, netfid, dentry->d_name.name, | |
949 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
950 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
951 | undo_setattr: | |
952 | if (dosattr != origattr) { | |
953 | info_buf->Attributes = cpu_to_le32(origattr); | |
954 | if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid, | |
955 | current->tgid)) | |
956 | cifsInode->cifsAttrs = origattr; | |
957 | } | |
958 | ||
959 | goto out_close; | |
a12a1ac7 JL |
960 | } |
961 | ||
ff694527 SF |
962 | |
963 | /* | |
964 | * If dentry->d_inode is null (usually meaning the cached dentry | |
965 | * is a negative dentry) then we would attempt a standard SMB delete, but | |
966 | * if that fails we can not attempt the fall back mechanisms on EACESS | |
967 | * but will return the EACESS to the caller. Note that the VFS does not call | |
968 | * unlink on negative dentries currently. | |
969 | */ | |
5f0319a7 | 970 | int cifs_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
971 | { |
972 | int rc = 0; | |
973 | int xid; | |
1da177e4 | 974 | char *full_path = NULL; |
5f0319a7 | 975 | struct inode *inode = dentry->d_inode; |
ff694527 | 976 | struct cifsInodeInfo *cifs_inode; |
5f0319a7 JL |
977 | struct super_block *sb = dir->i_sb; |
978 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
979 | struct cifsTconInfo *tcon = cifs_sb->tcon; | |
6050247d SF |
980 | struct iattr *attrs = NULL; |
981 | __u32 dosattr = 0, origattr = 0; | |
1da177e4 | 982 | |
5f0319a7 | 983 | cFYI(1, ("cifs_unlink, dir=0x%p, dentry=0x%p", dir, dentry)); |
1da177e4 LT |
984 | |
985 | xid = GetXid(); | |
986 | ||
5f0319a7 JL |
987 | /* Unlink can be called from rename so we can not take the |
988 | * sb->s_vfs_rename_mutex here */ | |
989 | full_path = build_path_from_dentry(dentry); | |
1da177e4 | 990 | if (full_path == NULL) { |
0f3bc09e | 991 | rc = -ENOMEM; |
1da177e4 | 992 | FreeXid(xid); |
0f3bc09e | 993 | return rc; |
1da177e4 | 994 | } |
2d785a50 | 995 | |
5f0319a7 | 996 | if ((tcon->ses->capabilities & CAP_UNIX) && |
2d785a50 | 997 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
5f0319a7 JL |
998 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { |
999 | rc = CIFSPOSIXDelFile(xid, tcon, full_path, | |
2d785a50 | 1000 | SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls, |
737b758c | 1001 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
2d785a50 SF |
1002 | cFYI(1, ("posix del rc %d", rc)); |
1003 | if ((rc == 0) || (rc == -ENOENT)) | |
1004 | goto psx_del_no_retry; | |
1005 | } | |
1da177e4 | 1006 | |
6050247d | 1007 | retry_std_delete: |
5f0319a7 | 1008 | rc = CIFSSMBDelFile(xid, tcon, full_path, cifs_sb->local_nls, |
2d785a50 | 1009 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
6050247d | 1010 | |
2d785a50 | 1011 | psx_del_no_retry: |
1da177e4 | 1012 | if (!rc) { |
5f0319a7 JL |
1013 | if (inode) |
1014 | drop_nlink(inode); | |
1da177e4 | 1015 | } else if (rc == -ENOENT) { |
5f0319a7 | 1016 | d_drop(dentry); |
1da177e4 | 1017 | } else if (rc == -ETXTBSY) { |
3270958b | 1018 | rc = cifs_rename_pending_delete(full_path, dentry, xid); |
a12a1ac7 JL |
1019 | if (rc == 0) |
1020 | drop_nlink(inode); | |
ff694527 | 1021 | } else if ((rc == -EACCES) && (dosattr == 0) && inode) { |
388e57b2 SF |
1022 | attrs = kzalloc(sizeof(*attrs), GFP_KERNEL); |
1023 | if (attrs == NULL) { | |
1024 | rc = -ENOMEM; | |
1025 | goto out_reval; | |
1da177e4 | 1026 | } |
388e57b2 SF |
1027 | |
1028 | /* try to reset dos attributes */ | |
ff694527 SF |
1029 | cifs_inode = CIFS_I(inode); |
1030 | origattr = cifs_inode->cifsAttrs; | |
6050247d SF |
1031 | if (origattr == 0) |
1032 | origattr |= ATTR_NORMAL; | |
1033 | dosattr = origattr & ~ATTR_READONLY; | |
388e57b2 SF |
1034 | if (dosattr == 0) |
1035 | dosattr |= ATTR_NORMAL; | |
1036 | dosattr |= ATTR_HIDDEN; | |
1037 | ||
1038 | rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); | |
388e57b2 SF |
1039 | if (rc != 0) |
1040 | goto out_reval; | |
6050247d SF |
1041 | |
1042 | goto retry_std_delete; | |
1da177e4 | 1043 | } |
6050247d SF |
1044 | |
1045 | /* undo the setattr if we errored out and it's needed */ | |
1046 | if (rc != 0 && dosattr != 0) | |
1047 | cifs_set_file_info(inode, attrs, xid, full_path, origattr); | |
1048 | ||
388e57b2 | 1049 | out_reval: |
4523cc30 | 1050 | if (inode) { |
ff694527 SF |
1051 | cifs_inode = CIFS_I(inode); |
1052 | cifs_inode->time = 0; /* will force revalidate to get info | |
5f0319a7 JL |
1053 | when needed */ |
1054 | inode->i_ctime = current_fs_time(sb); | |
06bcfedd | 1055 | } |
5f0319a7 | 1056 | dir->i_ctime = dir->i_mtime = current_fs_time(sb); |
ff694527 | 1057 | cifs_inode = CIFS_I(dir); |
6050247d | 1058 | CIFS_I(dir)->time = 0; /* force revalidate of dir as well */ |
1da177e4 LT |
1059 | |
1060 | kfree(full_path); | |
6050247d | 1061 | kfree(attrs); |
1da177e4 LT |
1062 | FreeXid(xid); |
1063 | return rc; | |
1064 | } | |
1065 | ||
44f68fad | 1066 | void posix_fill_in_inode(struct inode *tmp_inode, |
0b442d2c | 1067 | FILE_UNIX_BASIC_INFO *pData, int isNewInode) |
2dd29d31 | 1068 | { |
75f12983 | 1069 | struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); |
2dd29d31 SF |
1070 | loff_t local_size; |
1071 | struct timespec local_mtime; | |
1072 | ||
2dd29d31 SF |
1073 | cifsInfo->time = jiffies; |
1074 | atomic_inc(&cifsInfo->inUse); | |
1075 | ||
1076 | /* save mtime and size */ | |
1077 | local_mtime = tmp_inode->i_mtime; | |
1078 | local_size = tmp_inode->i_size; | |
1079 | ||
75f12983 | 1080 | cifs_unix_info_to_inode(tmp_inode, pData, 1); |
7962670e | 1081 | cifs_set_ops(tmp_inode, false); |
50c2f753 | 1082 | |
75f12983 CH |
1083 | if (!S_ISREG(tmp_inode->i_mode)) |
1084 | return; | |
2dd29d31 | 1085 | |
75f12983 CH |
1086 | /* |
1087 | * No sense invalidating pages for new inode | |
1088 | * since we we have not started caching | |
1089 | * readahead file data yet. | |
1090 | */ | |
1091 | if (isNewInode) | |
1092 | return; | |
2dd29d31 | 1093 | |
75f12983 CH |
1094 | if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && |
1095 | (local_size == tmp_inode->i_size)) { | |
1096 | cFYI(1, ("inode exists but unchanged")); | |
2dd29d31 | 1097 | } else { |
75f12983 CH |
1098 | /* file may have changed on server */ |
1099 | cFYI(1, ("invalidate inode, readdir detected change")); | |
1100 | invalidate_remote_inode(tmp_inode); | |
fb8c4b14 | 1101 | } |
2dd29d31 SF |
1102 | } |
1103 | ||
1da177e4 LT |
1104 | int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode) |
1105 | { | |
6b37faa1 | 1106 | int rc = 0, tmprc; |
1da177e4 LT |
1107 | int xid; |
1108 | struct cifs_sb_info *cifs_sb; | |
1109 | struct cifsTconInfo *pTcon; | |
1110 | char *full_path = NULL; | |
1111 | struct inode *newinode = NULL; | |
1112 | ||
6473a559 | 1113 | cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode)); |
1da177e4 LT |
1114 | |
1115 | xid = GetXid(); | |
1116 | ||
1117 | cifs_sb = CIFS_SB(inode->i_sb); | |
1118 | pTcon = cifs_sb->tcon; | |
1119 | ||
7f57356b | 1120 | full_path = build_path_from_dentry(direntry); |
1da177e4 | 1121 | if (full_path == NULL) { |
0f3bc09e | 1122 | rc = -ENOMEM; |
1da177e4 | 1123 | FreeXid(xid); |
0f3bc09e | 1124 | return rc; |
1da177e4 | 1125 | } |
50c2f753 | 1126 | |
fb8c4b14 SF |
1127 | if ((pTcon->ses->capabilities & CAP_UNIX) && |
1128 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & | |
2dd29d31 SF |
1129 | le64_to_cpu(pTcon->fsUnixInfo.Capability))) { |
1130 | u32 oplock = 0; | |
f6d09982 | 1131 | FILE_UNIX_BASIC_INFO *pInfo = |
2dd29d31 | 1132 | kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL); |
fb8c4b14 | 1133 | if (pInfo == NULL) { |
2dd29d31 SF |
1134 | rc = -ENOMEM; |
1135 | goto mkdir_out; | |
1136 | } | |
50c2f753 | 1137 | |
ce3b0f8d | 1138 | mode &= ~current_umask(); |
2dd29d31 SF |
1139 | rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT, |
1140 | mode, NULL /* netfid */, pInfo, &oplock, | |
fb8c4b14 SF |
1141 | full_path, cifs_sb->local_nls, |
1142 | cifs_sb->mnt_cifs_flags & | |
2dd29d31 | 1143 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
c45d707f SF |
1144 | if (rc == -EOPNOTSUPP) { |
1145 | kfree(pInfo); | |
1146 | goto mkdir_retry_old; | |
1147 | } else if (rc) { | |
2dd29d31 SF |
1148 | cFYI(1, ("posix mkdir returned 0x%x", rc)); |
1149 | d_drop(direntry); | |
1150 | } else { | |
85a6dac5 | 1151 | __u64 unique_id; |
8f2376ad CG |
1152 | if (pInfo->Type == cpu_to_le32(-1)) { |
1153 | /* no return info, go query for it */ | |
5a07cdf8 | 1154 | kfree(pInfo); |
fb8c4b14 | 1155 | goto mkdir_get_info; |
5a07cdf8 | 1156 | } |
fb8c4b14 SF |
1157 | /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need |
1158 | to set uid/gid */ | |
2dd29d31 SF |
1159 | inc_nlink(inode); |
1160 | if (pTcon->nocase) | |
1161 | direntry->d_op = &cifs_ci_dentry_ops; | |
1162 | else | |
1163 | direntry->d_op = &cifs_dentry_ops; | |
cbac3cba | 1164 | |
85a6dac5 SF |
1165 | unique_id = le64_to_cpu(pInfo->UniqueId); |
1166 | newinode = cifs_new_inode(inode->i_sb, &unique_id); | |
5a07cdf8 SF |
1167 | if (newinode == NULL) { |
1168 | kfree(pInfo); | |
cbac3cba | 1169 | goto mkdir_get_info; |
5a07cdf8 | 1170 | } |
6b37faa1 | 1171 | |
cbac3cba | 1172 | newinode->i_nlink = 2; |
2dd29d31 | 1173 | d_instantiate(direntry, newinode); |
cbac3cba SF |
1174 | |
1175 | /* we already checked in POSIXCreate whether | |
1176 | frame was long enough */ | |
1177 | posix_fill_in_inode(direntry->d_inode, | |
0b442d2c | 1178 | pInfo, 1 /* NewInode */); |
cbac3cba | 1179 | #ifdef CONFIG_CIFS_DEBUG2 |
fb8c4b14 | 1180 | cFYI(1, ("instantiated dentry %p %s to inode %p", |
cbac3cba SF |
1181 | direntry, direntry->d_name.name, newinode)); |
1182 | ||
fb8c4b14 SF |
1183 | if (newinode->i_nlink != 2) |
1184 | cFYI(1, ("unexpected number of links %d", | |
cbac3cba SF |
1185 | newinode->i_nlink)); |
1186 | #endif | |
2dd29d31 SF |
1187 | } |
1188 | kfree(pInfo); | |
1189 | goto mkdir_out; | |
fb8c4b14 | 1190 | } |
c45d707f | 1191 | mkdir_retry_old: |
1da177e4 | 1192 | /* BB add setting the equivalent of mode via CreateX w/ACLs */ |
737b758c SF |
1193 | rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls, |
1194 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 | 1195 | if (rc) { |
26a21b98 | 1196 | cFYI(1, ("cifs_mkdir returned 0x%x", rc)); |
1da177e4 LT |
1197 | d_drop(direntry); |
1198 | } else { | |
fb8c4b14 | 1199 | mkdir_get_info: |
d8c76e6f | 1200 | inc_nlink(inode); |
c18c842b | 1201 | if (pTcon->unix_ext) |
1da177e4 | 1202 | rc = cifs_get_inode_info_unix(&newinode, full_path, |
fb8c4b14 | 1203 | inode->i_sb, xid); |
1da177e4 LT |
1204 | else |
1205 | rc = cifs_get_inode_info(&newinode, full_path, NULL, | |
8b1327f6 | 1206 | inode->i_sb, xid, NULL); |
1da177e4 | 1207 | |
b92327fe SF |
1208 | if (pTcon->nocase) |
1209 | direntry->d_op = &cifs_ci_dentry_ops; | |
1210 | else | |
1211 | direntry->d_op = &cifs_dentry_ops; | |
1da177e4 | 1212 | d_instantiate(direntry, newinode); |
2dd29d31 | 1213 | /* setting nlink not necessary except in cases where we |
fb8c4b14 | 1214 | * failed to get it from the server or was set bogus */ |
2dd29d31 | 1215 | if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2)) |
fb8c4b14 | 1216 | direntry->d_inode->i_nlink = 2; |
95089910 | 1217 | |
ce3b0f8d | 1218 | mode &= ~current_umask(); |
95089910 JL |
1219 | /* must turn on setgid bit if parent dir has it */ |
1220 | if (inode->i_mode & S_ISGID) | |
1221 | mode |= S_ISGID; | |
1222 | ||
c18c842b | 1223 | if (pTcon->unix_ext) { |
4e1e7fb9 JL |
1224 | struct cifs_unix_set_info_args args = { |
1225 | .mode = mode, | |
1226 | .ctime = NO_CHANGE_64, | |
1227 | .atime = NO_CHANGE_64, | |
1228 | .mtime = NO_CHANGE_64, | |
1229 | .device = 0, | |
1230 | }; | |
d0d2f2df | 1231 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
a001e5b5 | 1232 | args.uid = (__u64)current_fsuid(); |
95089910 JL |
1233 | if (inode->i_mode & S_ISGID) |
1234 | args.gid = (__u64)inode->i_gid; | |
1235 | else | |
a001e5b5 | 1236 | args.gid = (__u64)current_fsgid(); |
1da177e4 | 1237 | } else { |
4e1e7fb9 JL |
1238 | args.uid = NO_CHANGE_64; |
1239 | args.gid = NO_CHANGE_64; | |
1da177e4 | 1240 | } |
4e1e7fb9 JL |
1241 | CIFSSMBUnixSetInfo(xid, pTcon, full_path, &args, |
1242 | cifs_sb->local_nls, | |
1243 | cifs_sb->mnt_cifs_flags & | |
1244 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
3ce53fc4 | 1245 | } else { |
67750fb9 JL |
1246 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) && |
1247 | (mode & S_IWUGO) == 0) { | |
1248 | FILE_BASIC_INFO pInfo; | |
6b37faa1 JL |
1249 | struct cifsInodeInfo *cifsInode; |
1250 | u32 dosattrs; | |
1251 | ||
67750fb9 | 1252 | memset(&pInfo, 0, sizeof(pInfo)); |
6b37faa1 JL |
1253 | cifsInode = CIFS_I(newinode); |
1254 | dosattrs = cifsInode->cifsAttrs|ATTR_READONLY; | |
1255 | pInfo.Attributes = cpu_to_le32(dosattrs); | |
1256 | tmprc = CIFSSMBSetPathInfo(xid, pTcon, | |
1257 | full_path, &pInfo, | |
1258 | cifs_sb->local_nls, | |
67750fb9 JL |
1259 | cifs_sb->mnt_cifs_flags & |
1260 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
6b37faa1 JL |
1261 | if (tmprc == 0) |
1262 | cifsInode->cifsAttrs = dosattrs; | |
67750fb9 | 1263 | } |
fb8c4b14 | 1264 | if (direntry->d_inode) { |
b0fd30d3 JL |
1265 | if (cifs_sb->mnt_cifs_flags & |
1266 | CIFS_MOUNT_DYNPERM) | |
1267 | direntry->d_inode->i_mode = | |
1268 | (mode | S_IFDIR); | |
4e94a105 | 1269 | |
fb8c4b14 | 1270 | if (cifs_sb->mnt_cifs_flags & |
6473a559 | 1271 | CIFS_MOUNT_SET_UID) { |
fb8c4b14 | 1272 | direntry->d_inode->i_uid = |
a001e5b5 | 1273 | current_fsuid(); |
95089910 JL |
1274 | if (inode->i_mode & S_ISGID) |
1275 | direntry->d_inode->i_gid = | |
1276 | inode->i_gid; | |
1277 | else | |
1278 | direntry->d_inode->i_gid = | |
a001e5b5 | 1279 | current_fsgid(); |
6473a559 SF |
1280 | } |
1281 | } | |
2a138ebb | 1282 | } |
1da177e4 | 1283 | } |
fb8c4b14 | 1284 | mkdir_out: |
1da177e4 LT |
1285 | kfree(full_path); |
1286 | FreeXid(xid); | |
1287 | return rc; | |
1288 | } | |
1289 | ||
1290 | int cifs_rmdir(struct inode *inode, struct dentry *direntry) | |
1291 | { | |
1292 | int rc = 0; | |
1293 | int xid; | |
1294 | struct cifs_sb_info *cifs_sb; | |
1295 | struct cifsTconInfo *pTcon; | |
1296 | char *full_path = NULL; | |
1297 | struct cifsInodeInfo *cifsInode; | |
1298 | ||
26a21b98 | 1299 | cFYI(1, ("cifs_rmdir, inode = 0x%p", inode)); |
1da177e4 LT |
1300 | |
1301 | xid = GetXid(); | |
1302 | ||
1303 | cifs_sb = CIFS_SB(inode->i_sb); | |
1304 | pTcon = cifs_sb->tcon; | |
1305 | ||
7f57356b | 1306 | full_path = build_path_from_dentry(direntry); |
1da177e4 | 1307 | if (full_path == NULL) { |
0f3bc09e | 1308 | rc = -ENOMEM; |
1da177e4 | 1309 | FreeXid(xid); |
0f3bc09e | 1310 | return rc; |
1da177e4 LT |
1311 | } |
1312 | ||
737b758c SF |
1313 | rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls, |
1314 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
1315 | |
1316 | if (!rc) { | |
9a53c3a7 | 1317 | drop_nlink(inode); |
3677db10 | 1318 | spin_lock(&direntry->d_inode->i_lock); |
fb8c4b14 | 1319 | i_size_write(direntry->d_inode, 0); |
ce71ec36 | 1320 | clear_nlink(direntry->d_inode); |
3677db10 | 1321 | spin_unlock(&direntry->d_inode->i_lock); |
1da177e4 LT |
1322 | } |
1323 | ||
1324 | cifsInode = CIFS_I(direntry->d_inode); | |
1325 | cifsInode->time = 0; /* force revalidate to go get info when | |
1326 | needed */ | |
42c24544 SF |
1327 | |
1328 | cifsInode = CIFS_I(inode); | |
1329 | cifsInode->time = 0; /* force revalidate to get parent dir info | |
1330 | since cached search results now invalid */ | |
1331 | ||
1da177e4 LT |
1332 | direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime = |
1333 | current_fs_time(inode->i_sb); | |
1334 | ||
1335 | kfree(full_path); | |
1336 | FreeXid(xid); | |
1337 | return rc; | |
1338 | } | |
1339 | ||
ee2fd967 SF |
1340 | static int |
1341 | cifs_do_rename(int xid, struct dentry *from_dentry, const char *fromPath, | |
1342 | struct dentry *to_dentry, const char *toPath) | |
1343 | { | |
1344 | struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb); | |
1345 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
1346 | __u16 srcfid; | |
1347 | int oplock, rc; | |
1348 | ||
1349 | /* try path-based rename first */ | |
1350 | rc = CIFSSMBRename(xid, pTcon, fromPath, toPath, cifs_sb->local_nls, | |
1351 | cifs_sb->mnt_cifs_flags & | |
1352 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1353 | ||
1354 | /* | |
1355 | * don't bother with rename by filehandle unless file is busy and | |
1356 | * source Note that cross directory moves do not work with | |
1357 | * rename by filehandle to various Windows servers. | |
1358 | */ | |
1359 | if (rc == 0 || rc != -ETXTBSY) | |
1360 | return rc; | |
1361 | ||
1362 | /* open the file to be renamed -- we need DELETE perms */ | |
1363 | rc = CIFSSMBOpen(xid, pTcon, fromPath, FILE_OPEN, DELETE, | |
1364 | CREATE_NOT_DIR, &srcfid, &oplock, NULL, | |
1365 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
1366 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1367 | ||
1368 | if (rc == 0) { | |
1369 | rc = CIFSSMBRenameOpenFile(xid, pTcon, srcfid, | |
1370 | (const char *) to_dentry->d_name.name, | |
1371 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
1372 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1373 | ||
1374 | CIFSSMBClose(xid, pTcon, srcfid); | |
1375 | } | |
1376 | ||
1377 | return rc; | |
1378 | } | |
1379 | ||
14121bdc JL |
1380 | int cifs_rename(struct inode *source_dir, struct dentry *source_dentry, |
1381 | struct inode *target_dir, struct dentry *target_dentry) | |
1da177e4 | 1382 | { |
ee2fd967 SF |
1383 | char *fromName = NULL; |
1384 | char *toName = NULL; | |
1da177e4 LT |
1385 | struct cifs_sb_info *cifs_sb_source; |
1386 | struct cifs_sb_info *cifs_sb_target; | |
14121bdc | 1387 | struct cifsTconInfo *tcon; |
ee2fd967 SF |
1388 | FILE_UNIX_BASIC_INFO *info_buf_source = NULL; |
1389 | FILE_UNIX_BASIC_INFO *info_buf_target; | |
8d281efb | 1390 | int xid, rc, tmprc; |
1da177e4 | 1391 | |
14121bdc JL |
1392 | cifs_sb_target = CIFS_SB(target_dir->i_sb); |
1393 | cifs_sb_source = CIFS_SB(source_dir->i_sb); | |
1394 | tcon = cifs_sb_source->tcon; | |
1da177e4 | 1395 | |
ee2fd967 SF |
1396 | xid = GetXid(); |
1397 | ||
1398 | /* | |
1399 | * BB: this might be allowed if same server, but different share. | |
1400 | * Consider adding support for this | |
1401 | */ | |
14121bdc | 1402 | if (tcon != cifs_sb_target->tcon) { |
ee2fd967 SF |
1403 | rc = -EXDEV; |
1404 | goto cifs_rename_exit; | |
1da177e4 LT |
1405 | } |
1406 | ||
ee2fd967 SF |
1407 | /* |
1408 | * we already have the rename sem so we do not need to | |
1409 | * grab it again here to protect the path integrity | |
1410 | */ | |
14121bdc | 1411 | fromName = build_path_from_dentry(source_dentry); |
ee2fd967 SF |
1412 | if (fromName == NULL) { |
1413 | rc = -ENOMEM; | |
1414 | goto cifs_rename_exit; | |
1415 | } | |
1416 | ||
14121bdc | 1417 | toName = build_path_from_dentry(target_dentry); |
ee2fd967 | 1418 | if (toName == NULL) { |
1da177e4 LT |
1419 | rc = -ENOMEM; |
1420 | goto cifs_rename_exit; | |
1421 | } | |
1422 | ||
14121bdc JL |
1423 | rc = cifs_do_rename(xid, source_dentry, fromName, |
1424 | target_dentry, toName); | |
ee2fd967 | 1425 | |
14121bdc JL |
1426 | if (rc == -EEXIST && tcon->unix_ext) { |
1427 | /* | |
1428 | * Are src and dst hardlinks of same inode? We can | |
1429 | * only tell with unix extensions enabled | |
1430 | */ | |
1431 | info_buf_source = | |
1432 | kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), | |
1433 | GFP_KERNEL); | |
1434 | if (info_buf_source == NULL) { | |
1435 | rc = -ENOMEM; | |
1436 | goto cifs_rename_exit; | |
1437 | } | |
1438 | ||
1439 | info_buf_target = info_buf_source + 1; | |
8d281efb | 1440 | tmprc = CIFSSMBUnixQPathInfo(xid, tcon, fromName, |
14121bdc JL |
1441 | info_buf_source, |
1442 | cifs_sb_source->local_nls, | |
1443 | cifs_sb_source->mnt_cifs_flags & | |
1444 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
8d281efb | 1445 | if (tmprc != 0) |
14121bdc | 1446 | goto unlink_target; |
ee2fd967 | 1447 | |
8d281efb | 1448 | tmprc = CIFSSMBUnixQPathInfo(xid, tcon, |
14121bdc JL |
1449 | toName, info_buf_target, |
1450 | cifs_sb_target->local_nls, | |
1451 | /* remap based on source sb */ | |
1452 | cifs_sb_source->mnt_cifs_flags & | |
1453 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1454 | ||
8d281efb | 1455 | if (tmprc == 0 && (info_buf_source->UniqueId == |
ae6884a9 | 1456 | info_buf_target->UniqueId)) { |
14121bdc | 1457 | /* same file, POSIX says that this is a noop */ |
ae6884a9 | 1458 | rc = 0; |
14121bdc | 1459 | goto cifs_rename_exit; |
ae6884a9 | 1460 | } |
14121bdc | 1461 | } /* else ... BB we could add the same check for Windows by |
ee2fd967 | 1462 | checking the UniqueId via FILE_INTERNAL_INFO */ |
14121bdc | 1463 | |
ee2fd967 | 1464 | unlink_target: |
fc6f3943 JL |
1465 | /* Try unlinking the target dentry if it's not negative */ |
1466 | if (target_dentry->d_inode && (rc == -EACCES || rc == -EEXIST)) { | |
8d281efb | 1467 | tmprc = cifs_unlink(target_dir, target_dentry); |
14121bdc JL |
1468 | if (tmprc) |
1469 | goto cifs_rename_exit; | |
1470 | ||
14121bdc JL |
1471 | rc = cifs_do_rename(xid, source_dentry, fromName, |
1472 | target_dentry, toName); | |
1da177e4 LT |
1473 | } |
1474 | ||
1475 | cifs_rename_exit: | |
ee2fd967 | 1476 | kfree(info_buf_source); |
1da177e4 LT |
1477 | kfree(fromName); |
1478 | kfree(toName); | |
1479 | FreeXid(xid); | |
1480 | return rc; | |
1481 | } | |
1482 | ||
1483 | int cifs_revalidate(struct dentry *direntry) | |
1484 | { | |
1485 | int xid; | |
cea21805 | 1486 | int rc = 0, wbrc = 0; |
1da177e4 LT |
1487 | char *full_path; |
1488 | struct cifs_sb_info *cifs_sb; | |
1489 | struct cifsInodeInfo *cifsInode; | |
1490 | loff_t local_size; | |
1491 | struct timespec local_mtime; | |
4b18f2a9 | 1492 | bool invalidate_inode = false; |
1da177e4 LT |
1493 | |
1494 | if (direntry->d_inode == NULL) | |
1495 | return -ENOENT; | |
1496 | ||
1497 | cifsInode = CIFS_I(direntry->d_inode); | |
1498 | ||
1499 | if (cifsInode == NULL) | |
1500 | return -ENOENT; | |
1501 | ||
1502 | /* no sense revalidating inode info on file that no one can write */ | |
1503 | if (CIFS_I(direntry->d_inode)->clientCanCacheRead) | |
1504 | return rc; | |
1505 | ||
1506 | xid = GetXid(); | |
1507 | ||
1508 | cifs_sb = CIFS_SB(direntry->d_sb); | |
1509 | ||
1510 | /* can not safely grab the rename sem here if rename calls revalidate | |
1511 | since that would deadlock */ | |
7f57356b | 1512 | full_path = build_path_from_dentry(direntry); |
1da177e4 | 1513 | if (full_path == NULL) { |
0f3bc09e | 1514 | rc = -ENOMEM; |
1da177e4 | 1515 | FreeXid(xid); |
0f3bc09e | 1516 | return rc; |
1da177e4 LT |
1517 | } |
1518 | cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld " | |
1519 | "jiffies %ld", full_path, direntry->d_inode, | |
1520 | direntry->d_inode->i_count.counter, direntry, | |
1521 | direntry->d_time, jiffies)); | |
1522 | ||
1523 | if (cifsInode->time == 0) { | |
1524 | /* was set to zero previously to force revalidate */ | |
1525 | } else if (time_before(jiffies, cifsInode->time + HZ) && | |
1526 | lookupCacheEnabled) { | |
1527 | if ((S_ISREG(direntry->d_inode->i_mode) == 0) || | |
1528 | (direntry->d_inode->i_nlink == 1)) { | |
1529 | kfree(full_path); | |
1530 | FreeXid(xid); | |
1531 | return rc; | |
1532 | } else { | |
1533 | cFYI(1, ("Have to revalidate file due to hardlinks")); | |
1534 | } | |
1535 | } | |
1536 | ||
1537 | /* save mtime and size */ | |
1538 | local_mtime = direntry->d_inode->i_mtime; | |
1539 | local_size = direntry->d_inode->i_size; | |
1540 | ||
c18c842b | 1541 | if (cifs_sb->tcon->unix_ext) { |
1da177e4 | 1542 | rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path, |
fb8c4b14 | 1543 | direntry->d_sb, xid); |
1da177e4 LT |
1544 | if (rc) { |
1545 | cFYI(1, ("error on getting revalidate info %d", rc)); | |
1546 | /* if (rc != -ENOENT) | |
1547 | rc = 0; */ /* BB should we cache info on | |
1548 | certain errors? */ | |
1549 | } | |
1550 | } else { | |
1551 | rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL, | |
8b1327f6 | 1552 | direntry->d_sb, xid, NULL); |
1da177e4 LT |
1553 | if (rc) { |
1554 | cFYI(1, ("error on getting revalidate info %d", rc)); | |
1555 | /* if (rc != -ENOENT) | |
1556 | rc = 0; */ /* BB should we cache info on | |
1557 | certain errors? */ | |
1558 | } | |
1559 | } | |
1560 | /* should we remap certain errors, access denied?, to zero */ | |
1561 | ||
1562 | /* if not oplocked, we invalidate inode pages if mtime or file size | |
1563 | had changed on server */ | |
1564 | ||
fb8c4b14 | 1565 | if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) && |
1da177e4 LT |
1566 | (local_size == direntry->d_inode->i_size)) { |
1567 | cFYI(1, ("cifs_revalidate - inode unchanged")); | |
1568 | } else { | |
1569 | /* file may have changed on server */ | |
1570 | if (cifsInode->clientCanCacheRead) { | |
1571 | /* no need to invalidate inode pages since we were the | |
1572 | only ones who could have modified the file and the | |
1573 | server copy is staler than ours */ | |
1574 | } else { | |
4b18f2a9 | 1575 | invalidate_inode = true; |
1da177e4 LT |
1576 | } |
1577 | } | |
1578 | ||
1579 | /* can not grab this sem since kernel filesys locking documentation | |
1b1dcc1b JS |
1580 | indicates i_mutex may be taken by the kernel on lookup and rename |
1581 | which could deadlock if we grab the i_mutex here as well */ | |
1582 | /* mutex_lock(&direntry->d_inode->i_mutex);*/ | |
1da177e4 LT |
1583 | /* need to write out dirty pages here */ |
1584 | if (direntry->d_inode->i_mapping) { | |
1585 | /* do we need to lock inode until after invalidate completes | |
1586 | below? */ | |
cea21805 JL |
1587 | wbrc = filemap_fdatawrite(direntry->d_inode->i_mapping); |
1588 | if (wbrc) | |
1589 | CIFS_I(direntry->d_inode)->write_behind_rc = wbrc; | |
1da177e4 LT |
1590 | } |
1591 | if (invalidate_inode) { | |
3abb9272 SF |
1592 | /* shrink_dcache not necessary now that cifs dentry ops |
1593 | are exported for negative dentries */ | |
fb8c4b14 | 1594 | /* if (S_ISDIR(direntry->d_inode->i_mode)) |
3abb9272 SF |
1595 | shrink_dcache_parent(direntry); */ |
1596 | if (S_ISREG(direntry->d_inode->i_mode)) { | |
9e96af85 | 1597 | if (direntry->d_inode->i_mapping) { |
cea21805 JL |
1598 | wbrc = filemap_fdatawait(direntry->d_inode->i_mapping); |
1599 | if (wbrc) | |
1600 | CIFS_I(direntry->d_inode)->write_behind_rc = wbrc; | |
9e96af85 | 1601 | } |
3abb9272 SF |
1602 | /* may eventually have to do this for open files too */ |
1603 | if (list_empty(&(cifsInode->openFileList))) { | |
1604 | /* changed on server - flush read ahead pages */ | |
1605 | cFYI(1, ("Invalidating read ahead data on " | |
1606 | "closed file")); | |
1607 | invalidate_remote_inode(direntry->d_inode); | |
1608 | } | |
1da177e4 LT |
1609 | } |
1610 | } | |
1b1dcc1b | 1611 | /* mutex_unlock(&direntry->d_inode->i_mutex); */ |
50c2f753 | 1612 | |
1da177e4 LT |
1613 | kfree(full_path); |
1614 | FreeXid(xid); | |
1615 | return rc; | |
1616 | } | |
1617 | ||
1618 | int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
1619 | struct kstat *stat) | |
1620 | { | |
1621 | int err = cifs_revalidate(dentry); | |
5fe14c85 | 1622 | if (!err) { |
1da177e4 | 1623 | generic_fillattr(dentry->d_inode, stat); |
5fe14c85 SF |
1624 | stat->blksize = CIFS_MAX_MSGSIZE; |
1625 | } | |
1da177e4 LT |
1626 | return err; |
1627 | } | |
1628 | ||
1629 | static int cifs_truncate_page(struct address_space *mapping, loff_t from) | |
1630 | { | |
1631 | pgoff_t index = from >> PAGE_CACHE_SHIFT; | |
1632 | unsigned offset = from & (PAGE_CACHE_SIZE - 1); | |
1633 | struct page *page; | |
1da177e4 LT |
1634 | int rc = 0; |
1635 | ||
1636 | page = grab_cache_page(mapping, index); | |
1637 | if (!page) | |
1638 | return -ENOMEM; | |
1639 | ||
eebd2aa3 | 1640 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); |
1da177e4 LT |
1641 | unlock_page(page); |
1642 | page_cache_release(page); | |
1643 | return rc; | |
1644 | } | |
1645 | ||
fb8c4b14 | 1646 | static int cifs_vmtruncate(struct inode *inode, loff_t offset) |
3677db10 SF |
1647 | { |
1648 | struct address_space *mapping = inode->i_mapping; | |
1649 | unsigned long limit; | |
1650 | ||
ba6a46a0 | 1651 | spin_lock(&inode->i_lock); |
3677db10 SF |
1652 | if (inode->i_size < offset) |
1653 | goto do_expand; | |
1654 | /* | |
1655 | * truncation of in-use swapfiles is disallowed - it would cause | |
1656 | * subsequent swapout to scribble on the now-freed blocks. | |
1657 | */ | |
ba6a46a0 SF |
1658 | if (IS_SWAPFILE(inode)) { |
1659 | spin_unlock(&inode->i_lock); | |
3677db10 | 1660 | goto out_busy; |
ba6a46a0 | 1661 | } |
3677db10 SF |
1662 | i_size_write(inode, offset); |
1663 | spin_unlock(&inode->i_lock); | |
8064ab4d SF |
1664 | /* |
1665 | * unmap_mapping_range is called twice, first simply for efficiency | |
1666 | * so that truncate_inode_pages does fewer single-page unmaps. However | |
1667 | * after this first call, and before truncate_inode_pages finishes, | |
1668 | * it is possible for private pages to be COWed, which remain after | |
1669 | * truncate_inode_pages finishes, hence the second unmap_mapping_range | |
1670 | * call must be made for correctness. | |
1671 | */ | |
3677db10 SF |
1672 | unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1); |
1673 | truncate_inode_pages(mapping, offset); | |
8064ab4d | 1674 | unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1); |
3677db10 SF |
1675 | goto out_truncate; |
1676 | ||
1677 | do_expand: | |
1678 | limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur; | |
ba6a46a0 SF |
1679 | if (limit != RLIM_INFINITY && offset > limit) { |
1680 | spin_unlock(&inode->i_lock); | |
3677db10 | 1681 | goto out_sig; |
ba6a46a0 SF |
1682 | } |
1683 | if (offset > inode->i_sb->s_maxbytes) { | |
1684 | spin_unlock(&inode->i_lock); | |
3677db10 | 1685 | goto out_big; |
ba6a46a0 | 1686 | } |
3677db10 | 1687 | i_size_write(inode, offset); |
ba6a46a0 | 1688 | spin_unlock(&inode->i_lock); |
3677db10 | 1689 | out_truncate: |
acfa4380 | 1690 | if (inode->i_op->truncate) |
3677db10 SF |
1691 | inode->i_op->truncate(inode); |
1692 | return 0; | |
1693 | out_sig: | |
1694 | send_sig(SIGXFSZ, current, 0); | |
1695 | out_big: | |
1696 | return -EFBIG; | |
1697 | out_busy: | |
1698 | return -ETXTBSY; | |
1699 | } | |
1700 | ||
8efdbde6 JL |
1701 | static int |
1702 | cifs_set_file_size(struct inode *inode, struct iattr *attrs, | |
1703 | int xid, char *full_path) | |
1704 | { | |
1705 | int rc; | |
1706 | struct cifsFileInfo *open_file; | |
1707 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); | |
1708 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
1709 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
1710 | ||
1711 | /* | |
1712 | * To avoid spurious oplock breaks from server, in the case of | |
1713 | * inodes that we already have open, avoid doing path based | |
1714 | * setting of file size if we can do it by handle. | |
1715 | * This keeps our caching token (oplock) and avoids timeouts | |
1716 | * when the local oplock break takes longer to flush | |
1717 | * writebehind data than the SMB timeout for the SetPathInfo | |
1718 | * request would allow | |
1719 | */ | |
1720 | open_file = find_writable_file(cifsInode); | |
1721 | if (open_file) { | |
1722 | __u16 nfid = open_file->netfid; | |
1723 | __u32 npid = open_file->pid; | |
1724 | rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size, nfid, | |
1725 | npid, false); | |
1726 | atomic_dec(&open_file->wrtPending); | |
1727 | cFYI(1, ("SetFSize for attrs rc = %d", rc)); | |
1728 | if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { | |
1729 | unsigned int bytes_written; | |
1730 | rc = CIFSSMBWrite(xid, pTcon, nfid, 0, attrs->ia_size, | |
1731 | &bytes_written, NULL, NULL, 1); | |
1732 | cFYI(1, ("Wrt seteof rc %d", rc)); | |
1733 | } | |
1734 | } else | |
1735 | rc = -EINVAL; | |
1736 | ||
1737 | if (rc != 0) { | |
1738 | /* Set file size by pathname rather than by handle | |
1739 | either because no valid, writeable file handle for | |
1740 | it was found or because there was an error setting | |
1741 | it by handle */ | |
1742 | rc = CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, | |
1743 | false, cifs_sb->local_nls, | |
1744 | cifs_sb->mnt_cifs_flags & | |
1745 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1746 | cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc)); | |
1747 | if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { | |
1748 | __u16 netfid; | |
1749 | int oplock = 0; | |
1750 | ||
1751 | rc = SMBLegacyOpen(xid, pTcon, full_path, | |
1752 | FILE_OPEN, GENERIC_WRITE, | |
1753 | CREATE_NOT_DIR, &netfid, &oplock, NULL, | |
1754 | cifs_sb->local_nls, | |
1755 | cifs_sb->mnt_cifs_flags & | |
1756 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1757 | if (rc == 0) { | |
1758 | unsigned int bytes_written; | |
1759 | rc = CIFSSMBWrite(xid, pTcon, netfid, 0, | |
1760 | attrs->ia_size, | |
1761 | &bytes_written, NULL, | |
1762 | NULL, 1); | |
1763 | cFYI(1, ("wrt seteof rc %d", rc)); | |
1764 | CIFSSMBClose(xid, pTcon, netfid); | |
1765 | } | |
1766 | } | |
1767 | } | |
1768 | ||
1769 | if (rc == 0) { | |
fbec9ab9 | 1770 | cifsInode->server_eof = attrs->ia_size; |
8efdbde6 JL |
1771 | rc = cifs_vmtruncate(inode, attrs->ia_size); |
1772 | cifs_truncate_page(inode->i_mapping, inode->i_size); | |
1773 | } | |
1774 | ||
1775 | return rc; | |
1776 | } | |
1777 | ||
3fe5c1dd JL |
1778 | static int |
1779 | cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs) | |
1780 | { | |
1781 | int rc; | |
1782 | int xid; | |
1783 | char *full_path = NULL; | |
1784 | struct inode *inode = direntry->d_inode; | |
1785 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); | |
1786 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
1787 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
1788 | struct cifs_unix_set_info_args *args = NULL; | |
1789 | ||
1790 | cFYI(1, ("setattr_unix on file %s attrs->ia_valid=0x%x", | |
1791 | direntry->d_name.name, attrs->ia_valid)); | |
1792 | ||
1793 | xid = GetXid(); | |
1794 | ||
1795 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) { | |
1796 | /* check if we have permission to change attrs */ | |
1797 | rc = inode_change_ok(inode, attrs); | |
1798 | if (rc < 0) | |
1799 | goto out; | |
1800 | else | |
1801 | rc = 0; | |
1802 | } | |
1803 | ||
1804 | full_path = build_path_from_dentry(direntry); | |
1805 | if (full_path == NULL) { | |
1806 | rc = -ENOMEM; | |
1807 | goto out; | |
1808 | } | |
1809 | ||
0f4d634c JL |
1810 | /* |
1811 | * Attempt to flush data before changing attributes. We need to do | |
1812 | * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the | |
1813 | * ownership or mode then we may also need to do this. Here, we take | |
1814 | * the safe way out and just do the flush on all setattr requests. If | |
1815 | * the flush returns error, store it to report later and continue. | |
1816 | * | |
1817 | * BB: This should be smarter. Why bother flushing pages that | |
1818 | * will be truncated anyway? Also, should we error out here if | |
1819 | * the flush returns error? | |
1820 | */ | |
1821 | rc = filemap_write_and_wait(inode->i_mapping); | |
1822 | if (rc != 0) { | |
1823 | cifsInode->write_behind_rc = rc; | |
1824 | rc = 0; | |
3fe5c1dd JL |
1825 | } |
1826 | ||
1827 | if (attrs->ia_valid & ATTR_SIZE) { | |
1828 | rc = cifs_set_file_size(inode, attrs, xid, full_path); | |
1829 | if (rc != 0) | |
1830 | goto out; | |
1831 | } | |
1832 | ||
1833 | /* skip mode change if it's just for clearing setuid/setgid */ | |
1834 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) | |
1835 | attrs->ia_valid &= ~ATTR_MODE; | |
1836 | ||
1837 | args = kmalloc(sizeof(*args), GFP_KERNEL); | |
1838 | if (args == NULL) { | |
1839 | rc = -ENOMEM; | |
1840 | goto out; | |
1841 | } | |
1842 | ||
1843 | /* set up the struct */ | |
1844 | if (attrs->ia_valid & ATTR_MODE) | |
1845 | args->mode = attrs->ia_mode; | |
1846 | else | |
1847 | args->mode = NO_CHANGE_64; | |
1848 | ||
1849 | if (attrs->ia_valid & ATTR_UID) | |
1850 | args->uid = attrs->ia_uid; | |
1851 | else | |
1852 | args->uid = NO_CHANGE_64; | |
1853 | ||
1854 | if (attrs->ia_valid & ATTR_GID) | |
1855 | args->gid = attrs->ia_gid; | |
1856 | else | |
1857 | args->gid = NO_CHANGE_64; | |
1858 | ||
1859 | if (attrs->ia_valid & ATTR_ATIME) | |
1860 | args->atime = cifs_UnixTimeToNT(attrs->ia_atime); | |
1861 | else | |
1862 | args->atime = NO_CHANGE_64; | |
1863 | ||
1864 | if (attrs->ia_valid & ATTR_MTIME) | |
1865 | args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime); | |
1866 | else | |
1867 | args->mtime = NO_CHANGE_64; | |
1868 | ||
1869 | if (attrs->ia_valid & ATTR_CTIME) | |
1870 | args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime); | |
1871 | else | |
1872 | args->ctime = NO_CHANGE_64; | |
1873 | ||
1874 | args->device = 0; | |
1875 | rc = CIFSSMBUnixSetInfo(xid, pTcon, full_path, args, | |
1876 | cifs_sb->local_nls, | |
1877 | cifs_sb->mnt_cifs_flags & | |
1878 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1879 | ||
1880 | if (!rc) | |
1881 | rc = inode_setattr(inode, attrs); | |
1882 | out: | |
1883 | kfree(args); | |
1884 | kfree(full_path); | |
1885 | FreeXid(xid); | |
1886 | return rc; | |
1887 | } | |
1888 | ||
0510eeb7 JL |
1889 | static int |
1890 | cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs) | |
1da177e4 LT |
1891 | { |
1892 | int xid; | |
3fe5c1dd JL |
1893 | struct inode *inode = direntry->d_inode; |
1894 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
3fe5c1dd | 1895 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
1da177e4 LT |
1896 | char *full_path = NULL; |
1897 | int rc = -EACCES; | |
feb3e20c | 1898 | __u32 dosattr = 0; |
4e1e7fb9 | 1899 | __u64 mode = NO_CHANGE_64; |
3fe5c1dd | 1900 | |
1da177e4 LT |
1901 | xid = GetXid(); |
1902 | ||
3979877e | 1903 | cFYI(1, ("setattr on file %s attrs->iavalid 0x%x", |
1da177e4 | 1904 | direntry->d_name.name, attrs->ia_valid)); |
6473a559 | 1905 | |
2a138ebb | 1906 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) { |
6473a559 | 1907 | /* check if we have permission to change attrs */ |
02eadeff | 1908 | rc = inode_change_ok(inode, attrs); |
fb8c4b14 | 1909 | if (rc < 0) { |
6473a559 SF |
1910 | FreeXid(xid); |
1911 | return rc; | |
1912 | } else | |
1913 | rc = 0; | |
1914 | } | |
50c2f753 | 1915 | |
7f57356b | 1916 | full_path = build_path_from_dentry(direntry); |
1da177e4 | 1917 | if (full_path == NULL) { |
0f3bc09e | 1918 | rc = -ENOMEM; |
1da177e4 | 1919 | FreeXid(xid); |
0f3bc09e | 1920 | return rc; |
1da177e4 | 1921 | } |
1da177e4 | 1922 | |
0f4d634c JL |
1923 | /* |
1924 | * Attempt to flush data before changing attributes. We need to do | |
1925 | * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the | |
1926 | * ownership or mode then we may also need to do this. Here, we take | |
1927 | * the safe way out and just do the flush on all setattr requests. If | |
1928 | * the flush returns error, store it to report later and continue. | |
1929 | * | |
1930 | * BB: This should be smarter. Why bother flushing pages that | |
1931 | * will be truncated anyway? Also, should we error out here if | |
1932 | * the flush returns error? | |
1933 | */ | |
1934 | rc = filemap_write_and_wait(inode->i_mapping); | |
1935 | if (rc != 0) { | |
1936 | cifsInode->write_behind_rc = rc; | |
1937 | rc = 0; | |
50531444 | 1938 | } |
cea21805 | 1939 | |
50531444 | 1940 | if (attrs->ia_valid & ATTR_SIZE) { |
8efdbde6 JL |
1941 | rc = cifs_set_file_size(inode, attrs, xid, full_path); |
1942 | if (rc != 0) | |
e30dcf3a | 1943 | goto cifs_setattr_exit; |
1da177e4 | 1944 | } |
4ca691a8 JL |
1945 | |
1946 | /* | |
1947 | * Without unix extensions we can't send ownership changes to the | |
1948 | * server, so silently ignore them. This is consistent with how | |
1949 | * local DOS/Windows filesystems behave (VFAT, NTFS, etc). With | |
1950 | * CIFSACL support + proper Windows to Unix idmapping, we may be | |
1951 | * able to support this in the future. | |
1952 | */ | |
3fe5c1dd | 1953 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) |
4ca691a8 | 1954 | attrs->ia_valid &= ~(ATTR_UID | ATTR_GID); |
1da177e4 | 1955 | |
d32c4f26 JL |
1956 | /* skip mode change if it's just for clearing setuid/setgid */ |
1957 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) | |
1958 | attrs->ia_valid &= ~ATTR_MODE; | |
1959 | ||
1da177e4 | 1960 | if (attrs->ia_valid & ATTR_MODE) { |
5132861a | 1961 | cFYI(1, ("Mode changed to 0%o", attrs->ia_mode)); |
1da177e4 | 1962 | mode = attrs->ia_mode; |
1da177e4 LT |
1963 | } |
1964 | ||
3fe5c1dd | 1965 | if (attrs->ia_valid & ATTR_MODE) { |
cdbce9c8 | 1966 | rc = 0; |
97837582 SF |
1967 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
1968 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) | |
02eadeff | 1969 | rc = mode_to_acl(inode, full_path, mode); |
5132861a | 1970 | else |
97837582 | 1971 | #endif |
5132861a JL |
1972 | if (((mode & S_IWUGO) == 0) && |
1973 | (cifsInode->cifsAttrs & ATTR_READONLY) == 0) { | |
feb3e20c JL |
1974 | |
1975 | dosattr = cifsInode->cifsAttrs | ATTR_READONLY; | |
1976 | ||
5132861a JL |
1977 | /* fix up mode if we're not using dynperm */ |
1978 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0) | |
1979 | attrs->ia_mode = inode->i_mode & ~S_IWUGO; | |
1980 | } else if ((mode & S_IWUGO) && | |
1981 | (cifsInode->cifsAttrs & ATTR_READONLY)) { | |
feb3e20c JL |
1982 | |
1983 | dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY; | |
1984 | /* Attributes of 0 are ignored */ | |
1985 | if (dosattr == 0) | |
1986 | dosattr |= ATTR_NORMAL; | |
5132861a JL |
1987 | |
1988 | /* reset local inode permissions to normal */ | |
1989 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { | |
1990 | attrs->ia_mode &= ~(S_IALLUGO); | |
1991 | if (S_ISDIR(inode->i_mode)) | |
1992 | attrs->ia_mode |= | |
1993 | cifs_sb->mnt_dir_mode; | |
1994 | else | |
1995 | attrs->ia_mode |= | |
1996 | cifs_sb->mnt_file_mode; | |
1997 | } | |
1998 | } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { | |
1999 | /* ignore mode change - ATTR_READONLY hasn't changed */ | |
2000 | attrs->ia_valid &= ~ATTR_MODE; | |
1da177e4 | 2001 | } |
1da177e4 LT |
2002 | } |
2003 | ||
feb3e20c JL |
2004 | if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) || |
2005 | ((attrs->ia_valid & ATTR_MODE) && dosattr)) { | |
2006 | rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); | |
2007 | /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */ | |
1da177e4 | 2008 | |
e30dcf3a SF |
2009 | /* Even if error on time set, no sense failing the call if |
2010 | the server would set the time to a reasonable value anyway, | |
2011 | and this check ensures that we are not being called from | |
2012 | sys_utimes in which case we ought to fail the call back to | |
2013 | the user when the server rejects the call */ | |
fb8c4b14 | 2014 | if ((rc) && (attrs->ia_valid & |
feb3e20c | 2015 | (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE))) |
e30dcf3a | 2016 | rc = 0; |
1da177e4 LT |
2017 | } |
2018 | ||
2019 | /* do not need local check to inode_check_ok since the server does | |
2020 | that */ | |
2021 | if (!rc) | |
02eadeff | 2022 | rc = inode_setattr(inode, attrs); |
e30dcf3a | 2023 | cifs_setattr_exit: |
1da177e4 LT |
2024 | kfree(full_path); |
2025 | FreeXid(xid); | |
2026 | return rc; | |
2027 | } | |
2028 | ||
0510eeb7 JL |
2029 | int |
2030 | cifs_setattr(struct dentry *direntry, struct iattr *attrs) | |
2031 | { | |
2032 | struct inode *inode = direntry->d_inode; | |
2033 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
2034 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
2035 | ||
2036 | if (pTcon->unix_ext) | |
2037 | return cifs_setattr_unix(direntry, attrs); | |
2038 | ||
2039 | return cifs_setattr_nounix(direntry, attrs); | |
2040 | ||
2041 | /* BB: add cifs_setattr_legacy for really old servers */ | |
2042 | } | |
2043 | ||
99ee4dbd | 2044 | #if 0 |
1da177e4 LT |
2045 | void cifs_delete_inode(struct inode *inode) |
2046 | { | |
26a21b98 | 2047 | cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode)); |
1da177e4 LT |
2048 | /* may have to add back in if and when safe distributed caching of |
2049 | directories added e.g. via FindNotify */ | |
2050 | } | |
99ee4dbd | 2051 | #endif |