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 | ||
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 | ||
132ac7b7 JL |
202 | /** |
203 | * cifs_new inode - create new inode, initialize, and hash it | |
204 | * @sb - pointer to superblock | |
205 | * @inum - if valid pointer and serverino is enabled, replace i_ino with val | |
206 | * | |
207 | * Create a new inode, initialize it for CIFS and hash it. Returns the new | |
208 | * inode or NULL if one couldn't be allocated. | |
209 | * | |
210 | * If the share isn't mounted with "serverino" or inum is a NULL pointer then | |
211 | * we'll just use the inode number assigned by new_inode(). Note that this can | |
212 | * mean i_ino collisions since the i_ino assigned by new_inode is not | |
213 | * guaranteed to be unique. | |
214 | */ | |
215 | struct inode * | |
950ec528 | 216 | cifs_new_inode(struct super_block *sb, __u64 *inum) |
132ac7b7 JL |
217 | { |
218 | struct inode *inode; | |
219 | ||
220 | inode = new_inode(sb); | |
221 | if (inode == NULL) | |
222 | return NULL; | |
223 | ||
224 | /* | |
225 | * BB: Is i_ino == 0 legal? Here, we assume that it is. If it isn't we | |
226 | * stop passing inum as ptr. Are there sanity checks we can use to | |
227 | * ensure that the server is really filling in that field? Also, | |
228 | * if serverino is disabled, perhaps we should be using iunique()? | |
229 | */ | |
230 | if (inum && (CIFS_SB(sb)->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) | |
950ec528 | 231 | inode->i_ino = (unsigned long) *inum; |
132ac7b7 JL |
232 | |
233 | /* | |
234 | * must set this here instead of cifs_alloc_inode since VFS will | |
235 | * clobber i_flags | |
236 | */ | |
237 | if (sb->s_flags & MS_NOATIME) | |
238 | inode->i_flags |= S_NOATIME | S_NOCMTIME; | |
239 | ||
240 | insert_inode_hash(inode); | |
241 | ||
242 | return inode; | |
243 | } | |
244 | ||
1da177e4 | 245 | int cifs_get_inode_info_unix(struct inode **pinode, |
646dd539 | 246 | const unsigned char *full_path, struct super_block *sb, int xid) |
1da177e4 LT |
247 | { |
248 | int rc = 0; | |
0e4bbde9 | 249 | FILE_UNIX_BASIC_INFO find_data; |
1da177e4 LT |
250 | struct cifsTconInfo *pTcon; |
251 | struct inode *inode; | |
252 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
7962670e | 253 | bool is_dfs_referral = false; |
0e4bbde9 SF |
254 | struct cifsInodeInfo *cifsInfo; |
255 | __u64 num_of_bytes; | |
256 | __u64 end_of_file; | |
1da177e4 LT |
257 | |
258 | pTcon = cifs_sb->tcon; | |
646dd539 | 259 | cFYI(1, ("Getting info on %s", full_path)); |
7962670e | 260 | |
1da177e4 | 261 | /* could have done a find first instead but this returns more info */ |
0e4bbde9 | 262 | rc = CIFSSMBUnixQPathInfo(xid, pTcon, full_path, &find_data, |
737b758c SF |
263 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
264 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
e911d0cc JL |
265 | if (rc == -EREMOTE && !is_dfs_referral) { |
266 | is_dfs_referral = true; | |
267 | cFYI(DBG2, ("DFS ref")); | |
268 | /* for DFS, server does not give us real inode data */ | |
269 | fill_fake_finddataunix(&find_data, sb); | |
270 | rc = 0; | |
271 | } else if (rc) | |
272 | goto cgiiu_exit; | |
273 | ||
0e4bbde9 SF |
274 | num_of_bytes = le64_to_cpu(find_data.NumOfBytes); |
275 | end_of_file = le64_to_cpu(find_data.EndOfFile); | |
1da177e4 | 276 | |
0e4bbde9 SF |
277 | /* get new inode */ |
278 | if (*pinode == NULL) { | |
950ec528 | 279 | *pinode = cifs_new_inode(sb, &find_data.UniqueId); |
1da177e4 | 280 | if (*pinode == NULL) { |
0e4bbde9 | 281 | rc = -ENOMEM; |
e911d0cc | 282 | goto cgiiu_exit; |
1da177e4 | 283 | } |
0e4bbde9 | 284 | } |
1da177e4 | 285 | |
0e4bbde9 SF |
286 | inode = *pinode; |
287 | cifsInfo = CIFS_I(inode); | |
1da177e4 | 288 | |
0e4bbde9 SF |
289 | cFYI(1, ("Old time %ld", cifsInfo->time)); |
290 | cifsInfo->time = jiffies; | |
291 | cFYI(1, ("New time %ld", cifsInfo->time)); | |
292 | /* this is ok to set on every inode revalidate */ | |
293 | atomic_set(&cifsInfo->inUse, 1); | |
1da177e4 | 294 | |
0e4bbde9 | 295 | cifs_unix_info_to_inode(inode, &find_data, 0); |
70eff55d | 296 | |
0e4bbde9 SF |
297 | if (num_of_bytes < end_of_file) |
298 | cFYI(1, ("allocation size less than end of file")); | |
299 | cFYI(1, ("Size %ld and blocks %llu", | |
300 | (unsigned long) inode->i_size, | |
301 | (unsigned long long)inode->i_blocks)); | |
302 | ||
303 | cifs_set_ops(inode, is_dfs_referral); | |
7962670e | 304 | cgiiu_exit: |
1da177e4 LT |
305 | return rc; |
306 | } | |
307 | ||
fb8c4b14 | 308 | static int decode_sfu_inode(struct inode *inode, __u64 size, |
d6e2f2a4 SF |
309 | const unsigned char *path, |
310 | struct cifs_sb_info *cifs_sb, int xid) | |
311 | { | |
312 | int rc; | |
4b18f2a9 | 313 | int oplock = 0; |
d6e2f2a4 SF |
314 | __u16 netfid; |
315 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
86c96b4b | 316 | char buf[24]; |
d6e2f2a4 | 317 | unsigned int bytes_read; |
fb8c4b14 | 318 | char *pbuf; |
d6e2f2a4 SF |
319 | |
320 | pbuf = buf; | |
321 | ||
4523cc30 | 322 | if (size == 0) { |
d6e2f2a4 SF |
323 | inode->i_mode |= S_IFIFO; |
324 | return 0; | |
325 | } else if (size < 8) { | |
326 | return -EINVAL; /* EOPNOTSUPP? */ | |
327 | } | |
50c2f753 | 328 | |
d6e2f2a4 SF |
329 | rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ, |
330 | CREATE_NOT_DIR, &netfid, &oplock, NULL, | |
331 | cifs_sb->local_nls, | |
332 | cifs_sb->mnt_cifs_flags & | |
333 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
fb8c4b14 | 334 | if (rc == 0) { |
ec637e3f | 335 | int buf_type = CIFS_NO_BUFFER; |
d6e2f2a4 SF |
336 | /* Read header */ |
337 | rc = CIFSSMBRead(xid, pTcon, | |
fb8c4b14 | 338 | netfid, |
86c96b4b | 339 | 24 /* length */, 0 /* offset */, |
ec637e3f | 340 | &bytes_read, &pbuf, &buf_type); |
4523cc30 SF |
341 | if ((rc == 0) && (bytes_read >= 8)) { |
342 | if (memcmp("IntxBLK", pbuf, 8) == 0) { | |
fb8c4b14 | 343 | cFYI(1, ("Block device")); |
3020a1f5 | 344 | inode->i_mode |= S_IFBLK; |
4523cc30 | 345 | if (bytes_read == 24) { |
86c96b4b SF |
346 | /* we have enough to decode dev num */ |
347 | __u64 mjr; /* major */ | |
348 | __u64 mnr; /* minor */ | |
349 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); | |
350 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); | |
351 | inode->i_rdev = MKDEV(mjr, mnr); | |
352 | } | |
4523cc30 | 353 | } else if (memcmp("IntxCHR", pbuf, 8) == 0) { |
fb8c4b14 | 354 | cFYI(1, ("Char device")); |
3020a1f5 | 355 | inode->i_mode |= S_IFCHR; |
4523cc30 | 356 | if (bytes_read == 24) { |
86c96b4b SF |
357 | /* we have enough to decode dev num */ |
358 | __u64 mjr; /* major */ | |
359 | __u64 mnr; /* minor */ | |
360 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); | |
361 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); | |
362 | inode->i_rdev = MKDEV(mjr, mnr); | |
fb8c4b14 | 363 | } |
4523cc30 | 364 | } else if (memcmp("IntxLNK", pbuf, 7) == 0) { |
fb8c4b14 | 365 | cFYI(1, ("Symlink")); |
3020a1f5 | 366 | inode->i_mode |= S_IFLNK; |
86c96b4b SF |
367 | } else { |
368 | inode->i_mode |= S_IFREG; /* file? */ | |
fb8c4b14 | 369 | rc = -EOPNOTSUPP; |
86c96b4b | 370 | } |
3020a1f5 SF |
371 | } else { |
372 | inode->i_mode |= S_IFREG; /* then it is a file */ | |
fb8c4b14 SF |
373 | rc = -EOPNOTSUPP; /* or some unknown SFU type */ |
374 | } | |
d6e2f2a4 | 375 | CIFSSMBClose(xid, pTcon, netfid); |
d6e2f2a4 SF |
376 | } |
377 | return rc; | |
d6e2f2a4 SF |
378 | } |
379 | ||
9e294f1c SF |
380 | #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */ |
381 | ||
953f8681 | 382 | static int get_sfu_mode(struct inode *inode, |
9e294f1c SF |
383 | const unsigned char *path, |
384 | struct cifs_sb_info *cifs_sb, int xid) | |
385 | { | |
3020a1f5 | 386 | #ifdef CONFIG_CIFS_XATTR |
9e294f1c SF |
387 | ssize_t rc; |
388 | char ea_value[4]; | |
389 | __u32 mode; | |
390 | ||
391 | rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS", | |
392 | ea_value, 4 /* size of buf */, cifs_sb->local_nls, | |
fb8c4b14 | 393 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
4523cc30 | 394 | if (rc < 0) |
9e294f1c SF |
395 | return (int)rc; |
396 | else if (rc > 3) { | |
397 | mode = le32_to_cpu(*((__le32 *)ea_value)); | |
fb8c4b14 SF |
398 | inode->i_mode &= ~SFBITS_MASK; |
399 | cFYI(1, ("special bits 0%o org mode 0%o", mode, inode->i_mode)); | |
9e294f1c | 400 | inode->i_mode = (mode & SFBITS_MASK) | inode->i_mode; |
fb8c4b14 | 401 | cFYI(1, ("special mode bits 0%o", mode)); |
9e294f1c SF |
402 | return 0; |
403 | } else { | |
404 | return 0; | |
405 | } | |
3020a1f5 SF |
406 | #else |
407 | return -EOPNOTSUPP; | |
408 | #endif | |
9e294f1c SF |
409 | } |
410 | ||
b9a3260f SF |
411 | /* |
412 | * Needed to setup inode data for the directory which is the | |
413 | * junction to the new submount (ie to setup the fake directory | |
414 | * which represents a DFS referral) | |
415 | */ | |
416 | static void fill_fake_finddata(FILE_ALL_INFO *pfnd_dat, | |
417 | struct super_block *sb) | |
418 | { | |
0a891adc | 419 | memset(pfnd_dat, 0, sizeof(FILE_ALL_INFO)); |
b9a3260f SF |
420 | |
421 | /* __le64 pfnd_dat->AllocationSize = cpu_to_le64(0); | |
422 | __le64 pfnd_dat->EndOfFile = cpu_to_le64(0); | |
423 | __u8 pfnd_dat->DeletePending = 0; | |
424 | __u8 pfnd_data->Directory = 0; | |
425 | __le32 pfnd_dat->EASize = 0; | |
426 | __u64 pfnd_dat->IndexNumber = 0; | |
427 | __u64 pfnd_dat->IndexNumber1 = 0; */ | |
428 | pfnd_dat->CreationTime = | |
429 | cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); | |
430 | pfnd_dat->LastAccessTime = | |
431 | cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); | |
432 | pfnd_dat->LastWriteTime = | |
433 | cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); | |
434 | pfnd_dat->ChangeTime = | |
435 | cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); | |
436 | pfnd_dat->Attributes = cpu_to_le32(ATTR_DIRECTORY); | |
437 | pfnd_dat->NumberOfLinks = cpu_to_le32(2); | |
438 | } | |
439 | ||
1da177e4 | 440 | int cifs_get_inode_info(struct inode **pinode, |
646dd539 | 441 | const unsigned char *full_path, FILE_ALL_INFO *pfindData, |
8b1327f6 | 442 | struct super_block *sb, int xid, const __u16 *pfid) |
1da177e4 LT |
443 | { |
444 | int rc = 0; | |
b9a3260f SF |
445 | __u32 attr; |
446 | struct cifsInodeInfo *cifsInfo; | |
1da177e4 LT |
447 | struct cifsTconInfo *pTcon; |
448 | struct inode *inode; | |
449 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
1da177e4 | 450 | char *buf = NULL; |
5ade9dea | 451 | bool adjustTZ = false; |
7962670e | 452 | bool is_dfs_referral = false; |
4468eb3f | 453 | umode_t default_mode; |
1da177e4 LT |
454 | |
455 | pTcon = cifs_sb->tcon; | |
646dd539 | 456 | cFYI(1, ("Getting info on %s", full_path)); |
1da177e4 | 457 | |
d0d2f2df SF |
458 | if ((pfindData == NULL) && (*pinode != NULL)) { |
459 | if (CIFS_I(*pinode)->clientCanCacheRead) { | |
fb8c4b14 | 460 | cFYI(1, ("No need to revalidate cached inode sizes")); |
1da177e4 LT |
461 | return rc; |
462 | } | |
463 | } | |
464 | ||
465 | /* if file info not passed in then get it from server */ | |
d0d2f2df | 466 | if (pfindData == NULL) { |
1da177e4 | 467 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
d0d2f2df | 468 | if (buf == NULL) |
1da177e4 LT |
469 | return -ENOMEM; |
470 | pfindData = (FILE_ALL_INFO *)buf; | |
7962670e | 471 | |
1da177e4 | 472 | /* could do find first instead but this returns more info */ |
7962670e | 473 | rc = CIFSSMBQPathInfo(xid, pTcon, full_path, pfindData, |
acf1a1b1 | 474 | 0 /* not legacy */, |
6b8edfe0 | 475 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
737b758c | 476 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
6b8edfe0 SF |
477 | /* BB optimize code so we do not make the above call |
478 | when server claims no NT SMB support and the above call | |
479 | failed at least once - set flag in tcon or mount */ | |
4523cc30 | 480 | if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) { |
7962670e | 481 | rc = SMBQueryInformation(xid, pTcon, full_path, |
fb8c4b14 | 482 | pfindData, cifs_sb->local_nls, |
6b8edfe0 SF |
483 | cifs_sb->mnt_cifs_flags & |
484 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
4b18f2a9 | 485 | adjustTZ = true; |
6b8edfe0 | 486 | } |
1da177e4 LT |
487 | } |
488 | /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */ | |
b9a3260f SF |
489 | if (rc == -EREMOTE) { |
490 | is_dfs_referral = true; | |
491 | fill_fake_finddata(pfindData, sb); | |
492 | rc = 0; | |
493 | } else if (rc) | |
7962670e | 494 | goto cgii_exit; |
1da177e4 | 495 | |
b9a3260f SF |
496 | attr = le32_to_cpu(pfindData->Attributes); |
497 | ||
498 | /* get new inode */ | |
499 | if (*pinode == NULL) { | |
132ac7b7 | 500 | __u64 inode_num; |
950ec528 | 501 | __u64 *pinum = &inode_num; |
132ac7b7 | 502 | |
b9a3260f SF |
503 | /* Is an i_ino of zero legal? Can we use that to check |
504 | if the server supports returning inode numbers? Are | |
505 | there other sanity checks we can use to ensure that | |
506 | the server is really filling in that field? */ | |
507 | ||
508 | /* We can not use the IndexNumber field by default from | |
509 | Windows or Samba (in ALL_INFO buf) but we can request | |
510 | it explicitly. It may not be unique presumably if | |
511 | the server has multiple devices mounted under one share */ | |
512 | ||
513 | /* There may be higher info levels that work but are | |
514 | there Windows server or network appliances for which | |
515 | IndexNumber field is not guaranteed unique? */ | |
516 | ||
517 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { | |
518 | int rc1 = 0; | |
b9a3260f SF |
519 | |
520 | rc1 = CIFSGetSrvInodeNumber(xid, pTcon, | |
950ec528 | 521 | full_path, pinum, |
737b758c SF |
522 | cifs_sb->local_nls, |
523 | cifs_sb->mnt_cifs_flags & | |
524 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
b9a3260f SF |
525 | if (rc1) { |
526 | cFYI(1, ("GetSrvInodeNum rc %d", rc1)); | |
950ec528 | 527 | pinum = NULL; |
b9a3260f | 528 | /* BB EOPNOSUPP disable SERVER_INUM? */ |
132ac7b7 | 529 | } |
132ac7b7 | 530 | } else { |
950ec528 | 531 | pinum = NULL; |
132ac7b7 JL |
532 | } |
533 | ||
950ec528 | 534 | *pinode = cifs_new_inode(sb, pinum); |
132ac7b7 JL |
535 | if (*pinode == NULL) { |
536 | rc = -ENOMEM; | |
537 | goto cgii_exit; | |
538 | } | |
b9a3260f SF |
539 | } |
540 | inode = *pinode; | |
541 | cifsInfo = CIFS_I(inode); | |
542 | cifsInfo->cifsAttrs = attr; | |
9a8165fc | 543 | cifsInfo->delete_pending = pfindData->DeletePending ? true : false; |
b9a3260f SF |
544 | cFYI(1, ("Old time %ld", cifsInfo->time)); |
545 | cifsInfo->time = jiffies; | |
546 | cFYI(1, ("New time %ld", cifsInfo->time)); | |
547 | ||
548 | /* blksize needs to be multiple of two. So safer to default to | |
549 | blksize and blkbits set in superblock so 2**blkbits and blksize | |
550 | will match rather than setting to: | |
551 | (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/ | |
552 | ||
553 | /* Linux can not store file creation time so ignore it */ | |
554 | if (pfindData->LastAccessTime) | |
555 | inode->i_atime = cifs_NTtimeToUnix | |
556 | (le64_to_cpu(pfindData->LastAccessTime)); | |
557 | else /* do not need to use current_fs_time - time not stored */ | |
558 | inode->i_atime = CURRENT_TIME; | |
559 | inode->i_mtime = | |
1da177e4 | 560 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime)); |
b9a3260f SF |
561 | inode->i_ctime = |
562 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime)); | |
563 | cFYI(DBG2, ("Attributes came in as 0x%x", attr)); | |
564 | if (adjustTZ && (pTcon->ses) && (pTcon->ses->server)) { | |
565 | inode->i_ctime.tv_sec += pTcon->ses->server->timeAdj; | |
566 | inode->i_mtime.tv_sec += pTcon->ses->server->timeAdj; | |
567 | } | |
1da177e4 | 568 | |
4468eb3f JL |
569 | /* get default inode mode */ |
570 | if (attr & ATTR_DIRECTORY) | |
571 | default_mode = cifs_sb->mnt_dir_mode; | |
572 | else | |
573 | default_mode = cifs_sb->mnt_file_mode; | |
574 | ||
575 | /* set permission bits */ | |
576 | if (atomic_read(&cifsInfo->inUse) == 0 || | |
577 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0) | |
578 | inode->i_mode = default_mode; | |
579 | else { | |
580 | /* just reenable write bits if !ATTR_READONLY */ | |
581 | if ((inode->i_mode & S_IWUGO) == 0 && | |
582 | (attr & ATTR_READONLY) == 0) | |
583 | inode->i_mode |= (S_IWUGO & default_mode); | |
aab3a8c7 IJ |
584 | |
585 | inode->i_mode &= ~S_IFMT; | |
4468eb3f JL |
586 | } |
587 | /* clear write bits if ATTR_READONLY is set */ | |
588 | if (attr & ATTR_READONLY) | |
589 | inode->i_mode &= ~S_IWUGO; | |
590 | ||
591 | /* set inode type */ | |
592 | if ((attr & ATTR_SYSTEM) && | |
593 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) { | |
594 | /* no need to fix endianness on 0 */ | |
595 | if (pfindData->EndOfFile == 0) | |
596 | inode->i_mode |= S_IFIFO; | |
597 | else if (decode_sfu_inode(inode, | |
598 | le64_to_cpu(pfindData->EndOfFile), | |
599 | full_path, cifs_sb, xid)) | |
600 | cFYI(1, ("unknown SFU file type\n")); | |
b9a3260f | 601 | } else { |
4468eb3f JL |
602 | if (attr & ATTR_DIRECTORY) |
603 | inode->i_mode |= S_IFDIR; | |
604 | else | |
605 | inode->i_mode |= S_IFREG; | |
b9a3260f SF |
606 | } |
607 | ||
608 | spin_lock(&inode->i_lock); | |
609 | if (is_size_safe_to_change(cifsInfo, | |
610 | le64_to_cpu(pfindData->EndOfFile))) { | |
611 | /* can not safely shrink the file size here if the | |
612 | client is writing to it due to potential races */ | |
613 | i_size_write(inode, le64_to_cpu(pfindData->EndOfFile)); | |
614 | ||
615 | /* 512 bytes (2**9) is the fake blocksize that must be | |
616 | used for this calculation */ | |
617 | inode->i_blocks = (512 - 1 + le64_to_cpu( | |
618 | pfindData->AllocationSize)) >> 9; | |
619 | } | |
620 | spin_unlock(&inode->i_lock); | |
1da177e4 | 621 | |
b9a3260f | 622 | inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks); |
1da177e4 | 623 | |
b9a3260f SF |
624 | /* BB fill in uid and gid here? with help from winbind? |
625 | or retrieve from NTFS stream extended attribute */ | |
4879b448 | 626 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
b9a3260f SF |
627 | /* fill in 0777 bits from ACL */ |
628 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { | |
629 | cFYI(1, ("Getting mode bits from ACL")); | |
630 | acl_to_uid_mode(inode, full_path, pfid); | |
631 | } | |
4879b448 | 632 | #endif |
b9a3260f SF |
633 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { |
634 | /* fill in remaining high mode bits e.g. SUID, VTX */ | |
635 | get_sfu_mode(inode, full_path, cifs_sb, xid); | |
636 | } else if (atomic_read(&cifsInfo->inUse) == 0) { | |
637 | inode->i_uid = cifs_sb->mnt_uid; | |
638 | inode->i_gid = cifs_sb->mnt_gid; | |
639 | /* set so we do not keep refreshing these fields with | |
640 | bad data after user has changed them in memory */ | |
641 | atomic_set(&cifsInfo->inUse, 1); | |
1da177e4 | 642 | } |
b9a3260f SF |
643 | |
644 | cifs_set_ops(inode, is_dfs_referral); | |
645 | ||
646 | ||
647 | ||
648 | ||
7962670e | 649 | cgii_exit: |
1da177e4 LT |
650 | kfree(buf); |
651 | return rc; | |
652 | } | |
653 | ||
7f8ed420 SF |
654 | static const struct inode_operations cifs_ipc_inode_ops = { |
655 | .lookup = cifs_lookup, | |
656 | }; | |
657 | ||
e4cce94c | 658 | char *cifs_build_path_to_root(struct cifs_sb_info *cifs_sb) |
8be0ed44 SF |
659 | { |
660 | int pplen = cifs_sb->prepathlen; | |
661 | int dfsplen; | |
662 | char *full_path = NULL; | |
663 | ||
664 | /* if no prefix path, simply set path to the root of share to "" */ | |
665 | if (pplen == 0) { | |
666 | full_path = kmalloc(1, GFP_KERNEL); | |
667 | if (full_path) | |
668 | full_path[0] = 0; | |
669 | return full_path; | |
670 | } | |
671 | ||
672 | if (cifs_sb->tcon && (cifs_sb->tcon->Flags & SMB_SHARE_IS_IN_DFS)) | |
673 | dfsplen = strnlen(cifs_sb->tcon->treeName, MAX_TREE_SIZE + 1); | |
674 | else | |
675 | dfsplen = 0; | |
676 | ||
677 | full_path = kmalloc(dfsplen + pplen + 1, GFP_KERNEL); | |
678 | if (full_path == NULL) | |
679 | return full_path; | |
680 | ||
681 | if (dfsplen) { | |
682 | strncpy(full_path, cifs_sb->tcon->treeName, dfsplen); | |
683 | /* switch slash direction in prepath depending on whether | |
684 | * windows or posix style path names | |
685 | */ | |
686 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) { | |
687 | int i; | |
688 | for (i = 0; i < dfsplen; i++) { | |
689 | if (full_path[i] == '\\') | |
690 | full_path[i] = '/'; | |
691 | } | |
692 | } | |
693 | } | |
694 | strncpy(full_path + dfsplen, cifs_sb->prepath, pplen); | |
695 | full_path[dfsplen + pplen] = 0; /* add trailing null */ | |
696 | return full_path; | |
697 | } | |
698 | ||
1da177e4 | 699 | /* gets root inode */ |
ce634ab2 | 700 | struct inode *cifs_iget(struct super_block *sb, unsigned long ino) |
1da177e4 | 701 | { |
ce634ab2 | 702 | int xid; |
1da177e4 | 703 | struct cifs_sb_info *cifs_sb; |
ce634ab2 DH |
704 | struct inode *inode; |
705 | long rc; | |
8be0ed44 | 706 | char *full_path; |
ce634ab2 DH |
707 | |
708 | inode = iget_locked(sb, ino); | |
709 | if (!inode) | |
710 | return ERR_PTR(-ENOMEM); | |
711 | if (!(inode->i_state & I_NEW)) | |
712 | return inode; | |
1da177e4 LT |
713 | |
714 | cifs_sb = CIFS_SB(inode->i_sb); | |
e4cce94c | 715 | full_path = cifs_build_path_to_root(cifs_sb); |
8be0ed44 SF |
716 | if (full_path == NULL) |
717 | return ERR_PTR(-ENOMEM); | |
c18c842b | 718 | |
8be0ed44 | 719 | xid = GetXid(); |
c18c842b | 720 | if (cifs_sb->tcon->unix_ext) |
8be0ed44 SF |
721 | rc = cifs_get_inode_info_unix(&inode, full_path, inode->i_sb, |
722 | xid); | |
1da177e4 | 723 | else |
8be0ed44 SF |
724 | rc = cifs_get_inode_info(&inode, full_path, NULL, inode->i_sb, |
725 | xid, NULL); | |
7f8ed420 SF |
726 | if (rc && cifs_sb->tcon->ipc) { |
727 | cFYI(1, ("ipc connection - fake read inode")); | |
728 | inode->i_mode |= S_IFDIR; | |
729 | inode->i_nlink = 2; | |
730 | inode->i_op = &cifs_ipc_inode_ops; | |
731 | inode->i_fop = &simple_dir_operations; | |
732 | inode->i_uid = cifs_sb->mnt_uid; | |
733 | inode->i_gid = cifs_sb->mnt_gid; | |
ad661334 | 734 | } else if (rc) { |
8be0ed44 | 735 | kfree(full_path); |
ce634ab2 DH |
736 | _FreeXid(xid); |
737 | iget_failed(inode); | |
738 | return ERR_PTR(rc); | |
7f8ed420 SF |
739 | } |
740 | ||
ce634ab2 DH |
741 | unlock_new_inode(inode); |
742 | ||
8be0ed44 | 743 | kfree(full_path); |
ce634ab2 DH |
744 | /* can not call macro FreeXid here since in a void func |
745 | * TODO: This is no longer true | |
746 | */ | |
1da177e4 | 747 | _FreeXid(xid); |
ce634ab2 | 748 | return inode; |
1da177e4 LT |
749 | } |
750 | ||
388e57b2 SF |
751 | static int |
752 | cifs_set_file_info(struct inode *inode, struct iattr *attrs, int xid, | |
753 | char *full_path, __u32 dosattr) | |
754 | { | |
755 | int rc; | |
756 | int oplock = 0; | |
757 | __u16 netfid; | |
758 | __u32 netpid; | |
759 | bool set_time = false; | |
760 | struct cifsFileInfo *open_file; | |
761 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); | |
762 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
763 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
764 | FILE_BASIC_INFO info_buf; | |
765 | ||
766 | if (attrs->ia_valid & ATTR_ATIME) { | |
767 | set_time = true; | |
768 | info_buf.LastAccessTime = | |
769 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime)); | |
770 | } else | |
771 | info_buf.LastAccessTime = 0; | |
772 | ||
773 | if (attrs->ia_valid & ATTR_MTIME) { | |
774 | set_time = true; | |
775 | info_buf.LastWriteTime = | |
776 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime)); | |
777 | } else | |
778 | info_buf.LastWriteTime = 0; | |
779 | ||
780 | /* | |
781 | * Samba throws this field away, but windows may actually use it. | |
782 | * Do not set ctime unless other time stamps are changed explicitly | |
783 | * (i.e. by utimes()) since we would then have a mix of client and | |
784 | * server times. | |
785 | */ | |
786 | if (set_time && (attrs->ia_valid & ATTR_CTIME)) { | |
787 | cFYI(1, ("CIFS - CTIME changed")); | |
788 | info_buf.ChangeTime = | |
789 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime)); | |
790 | } else | |
791 | info_buf.ChangeTime = 0; | |
792 | ||
793 | info_buf.CreationTime = 0; /* don't change */ | |
794 | info_buf.Attributes = cpu_to_le32(dosattr); | |
795 | ||
796 | /* | |
797 | * If the file is already open for write, just use that fileid | |
798 | */ | |
799 | open_file = find_writable_file(cifsInode); | |
800 | if (open_file) { | |
801 | netfid = open_file->netfid; | |
802 | netpid = open_file->pid; | |
803 | goto set_via_filehandle; | |
804 | } | |
805 | ||
806 | /* | |
807 | * NT4 apparently returns success on this call, but it doesn't | |
808 | * really work. | |
809 | */ | |
810 | if (!(pTcon->ses->flags & CIFS_SES_NT4)) { | |
811 | rc = CIFSSMBSetPathInfo(xid, pTcon, full_path, | |
812 | &info_buf, cifs_sb->local_nls, | |
813 | cifs_sb->mnt_cifs_flags & | |
814 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
6b37faa1 JL |
815 | if (rc == 0) { |
816 | cifsInode->cifsAttrs = dosattr; | |
817 | goto out; | |
818 | } else if (rc != -EOPNOTSUPP && rc != -EINVAL) | |
388e57b2 SF |
819 | goto out; |
820 | } | |
821 | ||
822 | cFYI(1, ("calling SetFileInfo since SetPathInfo for " | |
823 | "times not supported by this server")); | |
824 | rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, | |
825 | SYNCHRONIZE | FILE_WRITE_ATTRIBUTES, | |
826 | CREATE_NOT_DIR, &netfid, &oplock, | |
827 | NULL, cifs_sb->local_nls, | |
828 | cifs_sb->mnt_cifs_flags & | |
829 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
830 | ||
831 | if (rc != 0) { | |
832 | if (rc == -EIO) | |
833 | rc = -EINVAL; | |
834 | goto out; | |
835 | } | |
836 | ||
837 | netpid = current->tgid; | |
838 | ||
839 | set_via_filehandle: | |
840 | rc = CIFSSMBSetFileInfo(xid, pTcon, &info_buf, netfid, netpid); | |
d388908e SF |
841 | if (!rc) |
842 | cifsInode->cifsAttrs = dosattr; | |
843 | ||
388e57b2 SF |
844 | if (open_file == NULL) |
845 | CIFSSMBClose(xid, pTcon, netfid); | |
846 | else | |
847 | atomic_dec(&open_file->wrtPending); | |
848 | out: | |
849 | return rc; | |
850 | } | |
851 | ||
a12a1ac7 JL |
852 | /* |
853 | * open the given file (if it isn't already), set the DELETE_ON_CLOSE bit | |
854 | * and rename it to a random name that hopefully won't conflict with | |
855 | * anything else. | |
856 | */ | |
857 | static int | |
3270958b | 858 | cifs_rename_pending_delete(char *full_path, struct dentry *dentry, int xid) |
a12a1ac7 JL |
859 | { |
860 | int oplock = 0; | |
861 | int rc; | |
862 | __u16 netfid; | |
3270958b | 863 | struct inode *inode = dentry->d_inode; |
a12a1ac7 JL |
864 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
865 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
866 | struct cifsTconInfo *tcon = cifs_sb->tcon; | |
3270958b SF |
867 | __u32 dosattr, origattr; |
868 | FILE_BASIC_INFO *info_buf = NULL; | |
a12a1ac7 JL |
869 | |
870 | rc = CIFSSMBOpen(xid, tcon, full_path, FILE_OPEN, | |
dd1db2de | 871 | DELETE|FILE_WRITE_ATTRIBUTES, CREATE_NOT_DIR, |
a12a1ac7 JL |
872 | &netfid, &oplock, NULL, cifs_sb->local_nls, |
873 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
874 | if (rc != 0) | |
875 | goto out; | |
876 | ||
3270958b SF |
877 | origattr = cifsInode->cifsAttrs; |
878 | if (origattr == 0) | |
879 | origattr |= ATTR_NORMAL; | |
880 | ||
881 | dosattr = origattr & ~ATTR_READONLY; | |
a12a1ac7 JL |
882 | if (dosattr == 0) |
883 | dosattr |= ATTR_NORMAL; | |
884 | dosattr |= ATTR_HIDDEN; | |
885 | ||
3270958b SF |
886 | /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */ |
887 | if (dosattr != origattr) { | |
888 | info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL); | |
889 | if (info_buf == NULL) { | |
890 | rc = -ENOMEM; | |
891 | goto out_close; | |
892 | } | |
893 | info_buf->Attributes = cpu_to_le32(dosattr); | |
894 | rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid, | |
895 | current->tgid); | |
896 | /* although we would like to mark the file hidden | |
897 | if that fails we will still try to rename it */ | |
41346098 | 898 | if (rc != 0) |
3270958b SF |
899 | cifsInode->cifsAttrs = dosattr; |
900 | else | |
901 | dosattr = origattr; /* since not able to change them */ | |
a12a1ac7 | 902 | } |
a12a1ac7 | 903 | |
dd1db2de JL |
904 | /* rename the file */ |
905 | rc = CIFSSMBRenameOpenFile(xid, tcon, netfid, NULL, cifs_sb->local_nls, | |
a12a1ac7 JL |
906 | cifs_sb->mnt_cifs_flags & |
907 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
3270958b SF |
908 | if (rc != 0) { |
909 | rc = -ETXTBSY; | |
910 | goto undo_setattr; | |
911 | } | |
6d22f098 | 912 | |
3270958b SF |
913 | /* try to set DELETE_ON_CLOSE */ |
914 | if (!cifsInode->delete_pending) { | |
915 | rc = CIFSSMBSetFileDisposition(xid, tcon, true, netfid, | |
916 | current->tgid); | |
917 | /* | |
918 | * some samba versions return -ENOENT when we try to set the | |
919 | * file disposition here. Likely a samba bug, but work around | |
920 | * it for now. This means that some cifsXXX files may hang | |
921 | * around after they shouldn't. | |
922 | * | |
923 | * BB: remove this hack after more servers have the fix | |
924 | */ | |
925 | if (rc == -ENOENT) | |
926 | rc = 0; | |
927 | else if (rc != 0) { | |
928 | rc = -ETXTBSY; | |
929 | goto undo_rename; | |
930 | } | |
931 | cifsInode->delete_pending = true; | |
932 | } | |
7ce86d5a | 933 | |
a12a1ac7 JL |
934 | out_close: |
935 | CIFSSMBClose(xid, tcon, netfid); | |
936 | out: | |
3270958b | 937 | kfree(info_buf); |
a12a1ac7 | 938 | return rc; |
3270958b SF |
939 | |
940 | /* | |
941 | * reset everything back to the original state. Don't bother | |
942 | * dealing with errors here since we can't do anything about | |
943 | * them anyway. | |
944 | */ | |
945 | undo_rename: | |
946 | CIFSSMBRenameOpenFile(xid, tcon, netfid, dentry->d_name.name, | |
947 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
948 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
949 | undo_setattr: | |
950 | if (dosattr != origattr) { | |
951 | info_buf->Attributes = cpu_to_le32(origattr); | |
952 | if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid, | |
953 | current->tgid)) | |
954 | cifsInode->cifsAttrs = origattr; | |
955 | } | |
956 | ||
957 | goto out_close; | |
a12a1ac7 JL |
958 | } |
959 | ||
5f0319a7 | 960 | int cifs_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
961 | { |
962 | int rc = 0; | |
963 | int xid; | |
1da177e4 | 964 | char *full_path = NULL; |
5f0319a7 | 965 | struct inode *inode = dentry->d_inode; |
6050247d | 966 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
5f0319a7 JL |
967 | struct super_block *sb = dir->i_sb; |
968 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
969 | struct cifsTconInfo *tcon = cifs_sb->tcon; | |
6050247d SF |
970 | struct iattr *attrs = NULL; |
971 | __u32 dosattr = 0, origattr = 0; | |
1da177e4 | 972 | |
5f0319a7 | 973 | cFYI(1, ("cifs_unlink, dir=0x%p, dentry=0x%p", dir, dentry)); |
1da177e4 LT |
974 | |
975 | xid = GetXid(); | |
976 | ||
5f0319a7 JL |
977 | /* Unlink can be called from rename so we can not take the |
978 | * sb->s_vfs_rename_mutex here */ | |
979 | full_path = build_path_from_dentry(dentry); | |
1da177e4 LT |
980 | if (full_path == NULL) { |
981 | FreeXid(xid); | |
982 | return -ENOMEM; | |
983 | } | |
2d785a50 | 984 | |
5f0319a7 | 985 | if ((tcon->ses->capabilities & CAP_UNIX) && |
2d785a50 | 986 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
5f0319a7 JL |
987 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { |
988 | rc = CIFSPOSIXDelFile(xid, tcon, full_path, | |
2d785a50 | 989 | SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls, |
737b758c | 990 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
2d785a50 SF |
991 | cFYI(1, ("posix del rc %d", rc)); |
992 | if ((rc == 0) || (rc == -ENOENT)) | |
993 | goto psx_del_no_retry; | |
994 | } | |
1da177e4 | 995 | |
6050247d | 996 | retry_std_delete: |
5f0319a7 | 997 | rc = CIFSSMBDelFile(xid, tcon, full_path, cifs_sb->local_nls, |
2d785a50 | 998 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
6050247d | 999 | |
2d785a50 | 1000 | psx_del_no_retry: |
1da177e4 | 1001 | if (!rc) { |
5f0319a7 JL |
1002 | if (inode) |
1003 | drop_nlink(inode); | |
1da177e4 | 1004 | } else if (rc == -ENOENT) { |
5f0319a7 | 1005 | d_drop(dentry); |
1da177e4 | 1006 | } else if (rc == -ETXTBSY) { |
3270958b | 1007 | rc = cifs_rename_pending_delete(full_path, dentry, xid); |
a12a1ac7 JL |
1008 | if (rc == 0) |
1009 | drop_nlink(inode); | |
6050247d | 1010 | } else if (rc == -EACCES && dosattr == 0) { |
388e57b2 SF |
1011 | attrs = kzalloc(sizeof(*attrs), GFP_KERNEL); |
1012 | if (attrs == NULL) { | |
1013 | rc = -ENOMEM; | |
1014 | goto out_reval; | |
1da177e4 | 1015 | } |
388e57b2 SF |
1016 | |
1017 | /* try to reset dos attributes */ | |
6050247d SF |
1018 | origattr = cifsInode->cifsAttrs; |
1019 | if (origattr == 0) | |
1020 | origattr |= ATTR_NORMAL; | |
1021 | dosattr = origattr & ~ATTR_READONLY; | |
388e57b2 SF |
1022 | if (dosattr == 0) |
1023 | dosattr |= ATTR_NORMAL; | |
1024 | dosattr |= ATTR_HIDDEN; | |
1025 | ||
1026 | rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); | |
388e57b2 SF |
1027 | if (rc != 0) |
1028 | goto out_reval; | |
6050247d SF |
1029 | |
1030 | goto retry_std_delete; | |
1da177e4 | 1031 | } |
6050247d SF |
1032 | |
1033 | /* undo the setattr if we errored out and it's needed */ | |
1034 | if (rc != 0 && dosattr != 0) | |
1035 | cifs_set_file_info(inode, attrs, xid, full_path, origattr); | |
1036 | ||
388e57b2 | 1037 | out_reval: |
4523cc30 | 1038 | if (inode) { |
06bcfedd | 1039 | cifsInode = CIFS_I(inode); |
5f0319a7 JL |
1040 | cifsInode->time = 0; /* will force revalidate to get info |
1041 | when needed */ | |
1042 | inode->i_ctime = current_fs_time(sb); | |
06bcfedd | 1043 | } |
5f0319a7 JL |
1044 | dir->i_ctime = dir->i_mtime = current_fs_time(sb); |
1045 | cifsInode = CIFS_I(dir); | |
6050247d | 1046 | CIFS_I(dir)->time = 0; /* force revalidate of dir as well */ |
1da177e4 LT |
1047 | |
1048 | kfree(full_path); | |
6050247d | 1049 | kfree(attrs); |
1da177e4 LT |
1050 | FreeXid(xid); |
1051 | return rc; | |
1052 | } | |
1053 | ||
44f68fad | 1054 | void posix_fill_in_inode(struct inode *tmp_inode, |
0b442d2c | 1055 | FILE_UNIX_BASIC_INFO *pData, int isNewInode) |
2dd29d31 | 1056 | { |
75f12983 | 1057 | struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); |
2dd29d31 SF |
1058 | loff_t local_size; |
1059 | struct timespec local_mtime; | |
1060 | ||
2dd29d31 SF |
1061 | cifsInfo->time = jiffies; |
1062 | atomic_inc(&cifsInfo->inUse); | |
1063 | ||
1064 | /* save mtime and size */ | |
1065 | local_mtime = tmp_inode->i_mtime; | |
1066 | local_size = tmp_inode->i_size; | |
1067 | ||
75f12983 | 1068 | cifs_unix_info_to_inode(tmp_inode, pData, 1); |
7962670e | 1069 | cifs_set_ops(tmp_inode, false); |
50c2f753 | 1070 | |
75f12983 CH |
1071 | if (!S_ISREG(tmp_inode->i_mode)) |
1072 | return; | |
2dd29d31 | 1073 | |
75f12983 CH |
1074 | /* |
1075 | * No sense invalidating pages for new inode | |
1076 | * since we we have not started caching | |
1077 | * readahead file data yet. | |
1078 | */ | |
1079 | if (isNewInode) | |
1080 | return; | |
2dd29d31 | 1081 | |
75f12983 CH |
1082 | if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && |
1083 | (local_size == tmp_inode->i_size)) { | |
1084 | cFYI(1, ("inode exists but unchanged")); | |
2dd29d31 | 1085 | } else { |
75f12983 CH |
1086 | /* file may have changed on server */ |
1087 | cFYI(1, ("invalidate inode, readdir detected change")); | |
1088 | invalidate_remote_inode(tmp_inode); | |
fb8c4b14 | 1089 | } |
2dd29d31 SF |
1090 | } |
1091 | ||
1da177e4 LT |
1092 | int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode) |
1093 | { | |
6b37faa1 | 1094 | int rc = 0, tmprc; |
1da177e4 LT |
1095 | int xid; |
1096 | struct cifs_sb_info *cifs_sb; | |
1097 | struct cifsTconInfo *pTcon; | |
1098 | char *full_path = NULL; | |
1099 | struct inode *newinode = NULL; | |
1100 | ||
6473a559 | 1101 | cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode)); |
1da177e4 LT |
1102 | |
1103 | xid = GetXid(); | |
1104 | ||
1105 | cifs_sb = CIFS_SB(inode->i_sb); | |
1106 | pTcon = cifs_sb->tcon; | |
1107 | ||
7f57356b | 1108 | full_path = build_path_from_dentry(direntry); |
1da177e4 LT |
1109 | if (full_path == NULL) { |
1110 | FreeXid(xid); | |
1111 | return -ENOMEM; | |
1112 | } | |
50c2f753 | 1113 | |
fb8c4b14 SF |
1114 | if ((pTcon->ses->capabilities & CAP_UNIX) && |
1115 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & | |
2dd29d31 SF |
1116 | le64_to_cpu(pTcon->fsUnixInfo.Capability))) { |
1117 | u32 oplock = 0; | |
f6d09982 | 1118 | FILE_UNIX_BASIC_INFO *pInfo = |
2dd29d31 | 1119 | kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL); |
fb8c4b14 | 1120 | if (pInfo == NULL) { |
2dd29d31 SF |
1121 | rc = -ENOMEM; |
1122 | goto mkdir_out; | |
1123 | } | |
50c2f753 | 1124 | |
a8cd925f | 1125 | mode &= ~current->fs->umask; |
2dd29d31 SF |
1126 | rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT, |
1127 | mode, NULL /* netfid */, pInfo, &oplock, | |
fb8c4b14 SF |
1128 | full_path, cifs_sb->local_nls, |
1129 | cifs_sb->mnt_cifs_flags & | |
2dd29d31 | 1130 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
c45d707f SF |
1131 | if (rc == -EOPNOTSUPP) { |
1132 | kfree(pInfo); | |
1133 | goto mkdir_retry_old; | |
1134 | } else if (rc) { | |
2dd29d31 SF |
1135 | cFYI(1, ("posix mkdir returned 0x%x", rc)); |
1136 | d_drop(direntry); | |
1137 | } else { | |
8f2376ad CG |
1138 | if (pInfo->Type == cpu_to_le32(-1)) { |
1139 | /* no return info, go query for it */ | |
5a07cdf8 | 1140 | kfree(pInfo); |
fb8c4b14 | 1141 | goto mkdir_get_info; |
5a07cdf8 | 1142 | } |
fb8c4b14 SF |
1143 | /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need |
1144 | to set uid/gid */ | |
2dd29d31 SF |
1145 | inc_nlink(inode); |
1146 | if (pTcon->nocase) | |
1147 | direntry->d_op = &cifs_ci_dentry_ops; | |
1148 | else | |
1149 | direntry->d_op = &cifs_dentry_ops; | |
cbac3cba | 1150 | |
950ec528 JL |
1151 | newinode = cifs_new_inode(inode->i_sb, |
1152 | &pInfo->UniqueId); | |
5a07cdf8 SF |
1153 | if (newinode == NULL) { |
1154 | kfree(pInfo); | |
cbac3cba | 1155 | goto mkdir_get_info; |
5a07cdf8 | 1156 | } |
6b37faa1 | 1157 | |
cbac3cba | 1158 | newinode->i_nlink = 2; |
2dd29d31 | 1159 | d_instantiate(direntry, newinode); |
cbac3cba SF |
1160 | |
1161 | /* we already checked in POSIXCreate whether | |
1162 | frame was long enough */ | |
1163 | posix_fill_in_inode(direntry->d_inode, | |
0b442d2c | 1164 | pInfo, 1 /* NewInode */); |
cbac3cba | 1165 | #ifdef CONFIG_CIFS_DEBUG2 |
fb8c4b14 | 1166 | cFYI(1, ("instantiated dentry %p %s to inode %p", |
cbac3cba SF |
1167 | direntry, direntry->d_name.name, newinode)); |
1168 | ||
fb8c4b14 SF |
1169 | if (newinode->i_nlink != 2) |
1170 | cFYI(1, ("unexpected number of links %d", | |
cbac3cba SF |
1171 | newinode->i_nlink)); |
1172 | #endif | |
2dd29d31 SF |
1173 | } |
1174 | kfree(pInfo); | |
1175 | goto mkdir_out; | |
fb8c4b14 | 1176 | } |
c45d707f | 1177 | mkdir_retry_old: |
1da177e4 | 1178 | /* BB add setting the equivalent of mode via CreateX w/ACLs */ |
737b758c SF |
1179 | rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls, |
1180 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 | 1181 | if (rc) { |
26a21b98 | 1182 | cFYI(1, ("cifs_mkdir returned 0x%x", rc)); |
1da177e4 LT |
1183 | d_drop(direntry); |
1184 | } else { | |
fb8c4b14 | 1185 | mkdir_get_info: |
d8c76e6f | 1186 | inc_nlink(inode); |
c18c842b | 1187 | if (pTcon->unix_ext) |
1da177e4 | 1188 | rc = cifs_get_inode_info_unix(&newinode, full_path, |
fb8c4b14 | 1189 | inode->i_sb, xid); |
1da177e4 LT |
1190 | else |
1191 | rc = cifs_get_inode_info(&newinode, full_path, NULL, | |
8b1327f6 | 1192 | inode->i_sb, xid, NULL); |
1da177e4 | 1193 | |
b92327fe SF |
1194 | if (pTcon->nocase) |
1195 | direntry->d_op = &cifs_ci_dentry_ops; | |
1196 | else | |
1197 | direntry->d_op = &cifs_dentry_ops; | |
1da177e4 | 1198 | d_instantiate(direntry, newinode); |
2dd29d31 | 1199 | /* setting nlink not necessary except in cases where we |
fb8c4b14 | 1200 | * failed to get it from the server or was set bogus */ |
2dd29d31 | 1201 | if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2)) |
fb8c4b14 | 1202 | direntry->d_inode->i_nlink = 2; |
95089910 | 1203 | |
67750fb9 | 1204 | mode &= ~current->fs->umask; |
95089910 JL |
1205 | /* must turn on setgid bit if parent dir has it */ |
1206 | if (inode->i_mode & S_ISGID) | |
1207 | mode |= S_ISGID; | |
1208 | ||
c18c842b | 1209 | if (pTcon->unix_ext) { |
4e1e7fb9 JL |
1210 | struct cifs_unix_set_info_args args = { |
1211 | .mode = mode, | |
1212 | .ctime = NO_CHANGE_64, | |
1213 | .atime = NO_CHANGE_64, | |
1214 | .mtime = NO_CHANGE_64, | |
1215 | .device = 0, | |
1216 | }; | |
d0d2f2df | 1217 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
a001e5b5 | 1218 | args.uid = (__u64)current_fsuid(); |
95089910 JL |
1219 | if (inode->i_mode & S_ISGID) |
1220 | args.gid = (__u64)inode->i_gid; | |
1221 | else | |
a001e5b5 | 1222 | args.gid = (__u64)current_fsgid(); |
1da177e4 | 1223 | } else { |
4e1e7fb9 JL |
1224 | args.uid = NO_CHANGE_64; |
1225 | args.gid = NO_CHANGE_64; | |
1da177e4 | 1226 | } |
4e1e7fb9 JL |
1227 | CIFSSMBUnixSetInfo(xid, pTcon, full_path, &args, |
1228 | cifs_sb->local_nls, | |
1229 | cifs_sb->mnt_cifs_flags & | |
1230 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
3ce53fc4 | 1231 | } else { |
67750fb9 JL |
1232 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) && |
1233 | (mode & S_IWUGO) == 0) { | |
1234 | FILE_BASIC_INFO pInfo; | |
6b37faa1 JL |
1235 | struct cifsInodeInfo *cifsInode; |
1236 | u32 dosattrs; | |
1237 | ||
67750fb9 | 1238 | memset(&pInfo, 0, sizeof(pInfo)); |
6b37faa1 JL |
1239 | cifsInode = CIFS_I(newinode); |
1240 | dosattrs = cifsInode->cifsAttrs|ATTR_READONLY; | |
1241 | pInfo.Attributes = cpu_to_le32(dosattrs); | |
1242 | tmprc = CIFSSMBSetPathInfo(xid, pTcon, | |
1243 | full_path, &pInfo, | |
1244 | cifs_sb->local_nls, | |
67750fb9 JL |
1245 | cifs_sb->mnt_cifs_flags & |
1246 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
6b37faa1 JL |
1247 | if (tmprc == 0) |
1248 | cifsInode->cifsAttrs = dosattrs; | |
67750fb9 | 1249 | } |
fb8c4b14 | 1250 | if (direntry->d_inode) { |
b0fd30d3 JL |
1251 | if (cifs_sb->mnt_cifs_flags & |
1252 | CIFS_MOUNT_DYNPERM) | |
1253 | direntry->d_inode->i_mode = | |
1254 | (mode | S_IFDIR); | |
4e94a105 | 1255 | |
fb8c4b14 | 1256 | if (cifs_sb->mnt_cifs_flags & |
6473a559 | 1257 | CIFS_MOUNT_SET_UID) { |
fb8c4b14 | 1258 | direntry->d_inode->i_uid = |
a001e5b5 | 1259 | current_fsuid(); |
95089910 JL |
1260 | if (inode->i_mode & S_ISGID) |
1261 | direntry->d_inode->i_gid = | |
1262 | inode->i_gid; | |
1263 | else | |
1264 | direntry->d_inode->i_gid = | |
a001e5b5 | 1265 | current_fsgid(); |
6473a559 SF |
1266 | } |
1267 | } | |
2a138ebb | 1268 | } |
1da177e4 | 1269 | } |
fb8c4b14 | 1270 | mkdir_out: |
1da177e4 LT |
1271 | kfree(full_path); |
1272 | FreeXid(xid); | |
1273 | return rc; | |
1274 | } | |
1275 | ||
1276 | int cifs_rmdir(struct inode *inode, struct dentry *direntry) | |
1277 | { | |
1278 | int rc = 0; | |
1279 | int xid; | |
1280 | struct cifs_sb_info *cifs_sb; | |
1281 | struct cifsTconInfo *pTcon; | |
1282 | char *full_path = NULL; | |
1283 | struct cifsInodeInfo *cifsInode; | |
1284 | ||
26a21b98 | 1285 | cFYI(1, ("cifs_rmdir, inode = 0x%p", inode)); |
1da177e4 LT |
1286 | |
1287 | xid = GetXid(); | |
1288 | ||
1289 | cifs_sb = CIFS_SB(inode->i_sb); | |
1290 | pTcon = cifs_sb->tcon; | |
1291 | ||
7f57356b | 1292 | full_path = build_path_from_dentry(direntry); |
1da177e4 LT |
1293 | if (full_path == NULL) { |
1294 | FreeXid(xid); | |
1295 | return -ENOMEM; | |
1296 | } | |
1297 | ||
737b758c SF |
1298 | rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls, |
1299 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
1300 | |
1301 | if (!rc) { | |
9a53c3a7 | 1302 | drop_nlink(inode); |
3677db10 | 1303 | spin_lock(&direntry->d_inode->i_lock); |
fb8c4b14 | 1304 | i_size_write(direntry->d_inode, 0); |
ce71ec36 | 1305 | clear_nlink(direntry->d_inode); |
3677db10 | 1306 | spin_unlock(&direntry->d_inode->i_lock); |
1da177e4 LT |
1307 | } |
1308 | ||
1309 | cifsInode = CIFS_I(direntry->d_inode); | |
1310 | cifsInode->time = 0; /* force revalidate to go get info when | |
1311 | needed */ | |
42c24544 SF |
1312 | |
1313 | cifsInode = CIFS_I(inode); | |
1314 | cifsInode->time = 0; /* force revalidate to get parent dir info | |
1315 | since cached search results now invalid */ | |
1316 | ||
1da177e4 LT |
1317 | direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime = |
1318 | current_fs_time(inode->i_sb); | |
1319 | ||
1320 | kfree(full_path); | |
1321 | FreeXid(xid); | |
1322 | return rc; | |
1323 | } | |
1324 | ||
ee2fd967 SF |
1325 | static int |
1326 | cifs_do_rename(int xid, struct dentry *from_dentry, const char *fromPath, | |
1327 | struct dentry *to_dentry, const char *toPath) | |
1328 | { | |
1329 | struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb); | |
1330 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
1331 | __u16 srcfid; | |
1332 | int oplock, rc; | |
1333 | ||
1334 | /* try path-based rename first */ | |
1335 | rc = CIFSSMBRename(xid, pTcon, fromPath, toPath, cifs_sb->local_nls, | |
1336 | cifs_sb->mnt_cifs_flags & | |
1337 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1338 | ||
1339 | /* | |
1340 | * don't bother with rename by filehandle unless file is busy and | |
1341 | * source Note that cross directory moves do not work with | |
1342 | * rename by filehandle to various Windows servers. | |
1343 | */ | |
1344 | if (rc == 0 || rc != -ETXTBSY) | |
1345 | return rc; | |
1346 | ||
1347 | /* open the file to be renamed -- we need DELETE perms */ | |
1348 | rc = CIFSSMBOpen(xid, pTcon, fromPath, FILE_OPEN, DELETE, | |
1349 | CREATE_NOT_DIR, &srcfid, &oplock, NULL, | |
1350 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
1351 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1352 | ||
1353 | if (rc == 0) { | |
1354 | rc = CIFSSMBRenameOpenFile(xid, pTcon, srcfid, | |
1355 | (const char *) to_dentry->d_name.name, | |
1356 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
1357 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1358 | ||
1359 | CIFSSMBClose(xid, pTcon, srcfid); | |
1360 | } | |
1361 | ||
1362 | return rc; | |
1363 | } | |
1364 | ||
14121bdc JL |
1365 | int cifs_rename(struct inode *source_dir, struct dentry *source_dentry, |
1366 | struct inode *target_dir, struct dentry *target_dentry) | |
1da177e4 | 1367 | { |
ee2fd967 SF |
1368 | char *fromName = NULL; |
1369 | char *toName = NULL; | |
1da177e4 LT |
1370 | struct cifs_sb_info *cifs_sb_source; |
1371 | struct cifs_sb_info *cifs_sb_target; | |
14121bdc | 1372 | struct cifsTconInfo *tcon; |
ee2fd967 SF |
1373 | FILE_UNIX_BASIC_INFO *info_buf_source = NULL; |
1374 | FILE_UNIX_BASIC_INFO *info_buf_target; | |
8d281efb | 1375 | int xid, rc, tmprc; |
1da177e4 | 1376 | |
14121bdc JL |
1377 | cifs_sb_target = CIFS_SB(target_dir->i_sb); |
1378 | cifs_sb_source = CIFS_SB(source_dir->i_sb); | |
1379 | tcon = cifs_sb_source->tcon; | |
1da177e4 | 1380 | |
ee2fd967 SF |
1381 | xid = GetXid(); |
1382 | ||
1383 | /* | |
1384 | * BB: this might be allowed if same server, but different share. | |
1385 | * Consider adding support for this | |
1386 | */ | |
14121bdc | 1387 | if (tcon != cifs_sb_target->tcon) { |
ee2fd967 SF |
1388 | rc = -EXDEV; |
1389 | goto cifs_rename_exit; | |
1da177e4 LT |
1390 | } |
1391 | ||
ee2fd967 SF |
1392 | /* |
1393 | * we already have the rename sem so we do not need to | |
1394 | * grab it again here to protect the path integrity | |
1395 | */ | |
14121bdc | 1396 | fromName = build_path_from_dentry(source_dentry); |
ee2fd967 SF |
1397 | if (fromName == NULL) { |
1398 | rc = -ENOMEM; | |
1399 | goto cifs_rename_exit; | |
1400 | } | |
1401 | ||
14121bdc | 1402 | toName = build_path_from_dentry(target_dentry); |
ee2fd967 | 1403 | if (toName == NULL) { |
1da177e4 LT |
1404 | rc = -ENOMEM; |
1405 | goto cifs_rename_exit; | |
1406 | } | |
1407 | ||
14121bdc JL |
1408 | rc = cifs_do_rename(xid, source_dentry, fromName, |
1409 | target_dentry, toName); | |
ee2fd967 | 1410 | |
14121bdc JL |
1411 | if (rc == -EEXIST && tcon->unix_ext) { |
1412 | /* | |
1413 | * Are src and dst hardlinks of same inode? We can | |
1414 | * only tell with unix extensions enabled | |
1415 | */ | |
1416 | info_buf_source = | |
1417 | kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), | |
1418 | GFP_KERNEL); | |
1419 | if (info_buf_source == NULL) { | |
1420 | rc = -ENOMEM; | |
1421 | goto cifs_rename_exit; | |
1422 | } | |
1423 | ||
1424 | info_buf_target = info_buf_source + 1; | |
8d281efb | 1425 | tmprc = CIFSSMBUnixQPathInfo(xid, tcon, fromName, |
14121bdc JL |
1426 | info_buf_source, |
1427 | cifs_sb_source->local_nls, | |
1428 | cifs_sb_source->mnt_cifs_flags & | |
1429 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
8d281efb | 1430 | if (tmprc != 0) |
14121bdc | 1431 | goto unlink_target; |
ee2fd967 | 1432 | |
8d281efb | 1433 | tmprc = CIFSSMBUnixQPathInfo(xid, tcon, |
14121bdc JL |
1434 | toName, info_buf_target, |
1435 | cifs_sb_target->local_nls, | |
1436 | /* remap based on source sb */ | |
1437 | cifs_sb_source->mnt_cifs_flags & | |
1438 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1439 | ||
8d281efb | 1440 | if (tmprc == 0 && (info_buf_source->UniqueId == |
ae6884a9 | 1441 | info_buf_target->UniqueId)) { |
14121bdc | 1442 | /* same file, POSIX says that this is a noop */ |
ae6884a9 | 1443 | rc = 0; |
14121bdc | 1444 | goto cifs_rename_exit; |
ae6884a9 | 1445 | } |
14121bdc | 1446 | } /* else ... BB we could add the same check for Windows by |
ee2fd967 | 1447 | checking the UniqueId via FILE_INTERNAL_INFO */ |
14121bdc | 1448 | |
ee2fd967 | 1449 | unlink_target: |
8d281efb JL |
1450 | if ((rc == -EACCES) || (rc == -EEXIST)) { |
1451 | tmprc = cifs_unlink(target_dir, target_dentry); | |
14121bdc JL |
1452 | if (tmprc) |
1453 | goto cifs_rename_exit; | |
1454 | ||
14121bdc JL |
1455 | rc = cifs_do_rename(xid, source_dentry, fromName, |
1456 | target_dentry, toName); | |
1da177e4 LT |
1457 | } |
1458 | ||
1459 | cifs_rename_exit: | |
ee2fd967 | 1460 | kfree(info_buf_source); |
1da177e4 LT |
1461 | kfree(fromName); |
1462 | kfree(toName); | |
1463 | FreeXid(xid); | |
1464 | return rc; | |
1465 | } | |
1466 | ||
1467 | int cifs_revalidate(struct dentry *direntry) | |
1468 | { | |
1469 | int xid; | |
cea21805 | 1470 | int rc = 0, wbrc = 0; |
1da177e4 LT |
1471 | char *full_path; |
1472 | struct cifs_sb_info *cifs_sb; | |
1473 | struct cifsInodeInfo *cifsInode; | |
1474 | loff_t local_size; | |
1475 | struct timespec local_mtime; | |
4b18f2a9 | 1476 | bool invalidate_inode = false; |
1da177e4 LT |
1477 | |
1478 | if (direntry->d_inode == NULL) | |
1479 | return -ENOENT; | |
1480 | ||
1481 | cifsInode = CIFS_I(direntry->d_inode); | |
1482 | ||
1483 | if (cifsInode == NULL) | |
1484 | return -ENOENT; | |
1485 | ||
1486 | /* no sense revalidating inode info on file that no one can write */ | |
1487 | if (CIFS_I(direntry->d_inode)->clientCanCacheRead) | |
1488 | return rc; | |
1489 | ||
1490 | xid = GetXid(); | |
1491 | ||
1492 | cifs_sb = CIFS_SB(direntry->d_sb); | |
1493 | ||
1494 | /* can not safely grab the rename sem here if rename calls revalidate | |
1495 | since that would deadlock */ | |
7f57356b | 1496 | full_path = build_path_from_dentry(direntry); |
1da177e4 LT |
1497 | if (full_path == NULL) { |
1498 | FreeXid(xid); | |
1499 | return -ENOMEM; | |
1500 | } | |
1501 | cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld " | |
1502 | "jiffies %ld", full_path, direntry->d_inode, | |
1503 | direntry->d_inode->i_count.counter, direntry, | |
1504 | direntry->d_time, jiffies)); | |
1505 | ||
1506 | if (cifsInode->time == 0) { | |
1507 | /* was set to zero previously to force revalidate */ | |
1508 | } else if (time_before(jiffies, cifsInode->time + HZ) && | |
1509 | lookupCacheEnabled) { | |
1510 | if ((S_ISREG(direntry->d_inode->i_mode) == 0) || | |
1511 | (direntry->d_inode->i_nlink == 1)) { | |
1512 | kfree(full_path); | |
1513 | FreeXid(xid); | |
1514 | return rc; | |
1515 | } else { | |
1516 | cFYI(1, ("Have to revalidate file due to hardlinks")); | |
1517 | } | |
1518 | } | |
1519 | ||
1520 | /* save mtime and size */ | |
1521 | local_mtime = direntry->d_inode->i_mtime; | |
1522 | local_size = direntry->d_inode->i_size; | |
1523 | ||
c18c842b | 1524 | if (cifs_sb->tcon->unix_ext) { |
1da177e4 | 1525 | rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path, |
fb8c4b14 | 1526 | direntry->d_sb, xid); |
1da177e4 LT |
1527 | if (rc) { |
1528 | cFYI(1, ("error on getting revalidate info %d", rc)); | |
1529 | /* if (rc != -ENOENT) | |
1530 | rc = 0; */ /* BB should we cache info on | |
1531 | certain errors? */ | |
1532 | } | |
1533 | } else { | |
1534 | rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL, | |
8b1327f6 | 1535 | direntry->d_sb, xid, NULL); |
1da177e4 LT |
1536 | if (rc) { |
1537 | cFYI(1, ("error on getting revalidate info %d", rc)); | |
1538 | /* if (rc != -ENOENT) | |
1539 | rc = 0; */ /* BB should we cache info on | |
1540 | certain errors? */ | |
1541 | } | |
1542 | } | |
1543 | /* should we remap certain errors, access denied?, to zero */ | |
1544 | ||
1545 | /* if not oplocked, we invalidate inode pages if mtime or file size | |
1546 | had changed on server */ | |
1547 | ||
fb8c4b14 | 1548 | if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) && |
1da177e4 LT |
1549 | (local_size == direntry->d_inode->i_size)) { |
1550 | cFYI(1, ("cifs_revalidate - inode unchanged")); | |
1551 | } else { | |
1552 | /* file may have changed on server */ | |
1553 | if (cifsInode->clientCanCacheRead) { | |
1554 | /* no need to invalidate inode pages since we were the | |
1555 | only ones who could have modified the file and the | |
1556 | server copy is staler than ours */ | |
1557 | } else { | |
4b18f2a9 | 1558 | invalidate_inode = true; |
1da177e4 LT |
1559 | } |
1560 | } | |
1561 | ||
1562 | /* can not grab this sem since kernel filesys locking documentation | |
1b1dcc1b JS |
1563 | indicates i_mutex may be taken by the kernel on lookup and rename |
1564 | which could deadlock if we grab the i_mutex here as well */ | |
1565 | /* mutex_lock(&direntry->d_inode->i_mutex);*/ | |
1da177e4 LT |
1566 | /* need to write out dirty pages here */ |
1567 | if (direntry->d_inode->i_mapping) { | |
1568 | /* do we need to lock inode until after invalidate completes | |
1569 | below? */ | |
cea21805 JL |
1570 | wbrc = filemap_fdatawrite(direntry->d_inode->i_mapping); |
1571 | if (wbrc) | |
1572 | CIFS_I(direntry->d_inode)->write_behind_rc = wbrc; | |
1da177e4 LT |
1573 | } |
1574 | if (invalidate_inode) { | |
3abb9272 SF |
1575 | /* shrink_dcache not necessary now that cifs dentry ops |
1576 | are exported for negative dentries */ | |
fb8c4b14 | 1577 | /* if (S_ISDIR(direntry->d_inode->i_mode)) |
3abb9272 SF |
1578 | shrink_dcache_parent(direntry); */ |
1579 | if (S_ISREG(direntry->d_inode->i_mode)) { | |
9e96af85 | 1580 | if (direntry->d_inode->i_mapping) { |
cea21805 JL |
1581 | wbrc = filemap_fdatawait(direntry->d_inode->i_mapping); |
1582 | if (wbrc) | |
1583 | CIFS_I(direntry->d_inode)->write_behind_rc = wbrc; | |
9e96af85 | 1584 | } |
3abb9272 SF |
1585 | /* may eventually have to do this for open files too */ |
1586 | if (list_empty(&(cifsInode->openFileList))) { | |
1587 | /* changed on server - flush read ahead pages */ | |
1588 | cFYI(1, ("Invalidating read ahead data on " | |
1589 | "closed file")); | |
1590 | invalidate_remote_inode(direntry->d_inode); | |
1591 | } | |
1da177e4 LT |
1592 | } |
1593 | } | |
1b1dcc1b | 1594 | /* mutex_unlock(&direntry->d_inode->i_mutex); */ |
50c2f753 | 1595 | |
1da177e4 LT |
1596 | kfree(full_path); |
1597 | FreeXid(xid); | |
1598 | return rc; | |
1599 | } | |
1600 | ||
1601 | int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
1602 | struct kstat *stat) | |
1603 | { | |
1604 | int err = cifs_revalidate(dentry); | |
5fe14c85 | 1605 | if (!err) { |
1da177e4 | 1606 | generic_fillattr(dentry->d_inode, stat); |
5fe14c85 SF |
1607 | stat->blksize = CIFS_MAX_MSGSIZE; |
1608 | } | |
1da177e4 LT |
1609 | return err; |
1610 | } | |
1611 | ||
1612 | static int cifs_truncate_page(struct address_space *mapping, loff_t from) | |
1613 | { | |
1614 | pgoff_t index = from >> PAGE_CACHE_SHIFT; | |
1615 | unsigned offset = from & (PAGE_CACHE_SIZE - 1); | |
1616 | struct page *page; | |
1da177e4 LT |
1617 | int rc = 0; |
1618 | ||
1619 | page = grab_cache_page(mapping, index); | |
1620 | if (!page) | |
1621 | return -ENOMEM; | |
1622 | ||
eebd2aa3 | 1623 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); |
1da177e4 LT |
1624 | unlock_page(page); |
1625 | page_cache_release(page); | |
1626 | return rc; | |
1627 | } | |
1628 | ||
fb8c4b14 | 1629 | static int cifs_vmtruncate(struct inode *inode, loff_t offset) |
3677db10 SF |
1630 | { |
1631 | struct address_space *mapping = inode->i_mapping; | |
1632 | unsigned long limit; | |
1633 | ||
ba6a46a0 | 1634 | spin_lock(&inode->i_lock); |
3677db10 SF |
1635 | if (inode->i_size < offset) |
1636 | goto do_expand; | |
1637 | /* | |
1638 | * truncation of in-use swapfiles is disallowed - it would cause | |
1639 | * subsequent swapout to scribble on the now-freed blocks. | |
1640 | */ | |
ba6a46a0 SF |
1641 | if (IS_SWAPFILE(inode)) { |
1642 | spin_unlock(&inode->i_lock); | |
3677db10 | 1643 | goto out_busy; |
ba6a46a0 | 1644 | } |
3677db10 SF |
1645 | i_size_write(inode, offset); |
1646 | spin_unlock(&inode->i_lock); | |
8064ab4d SF |
1647 | /* |
1648 | * unmap_mapping_range is called twice, first simply for efficiency | |
1649 | * so that truncate_inode_pages does fewer single-page unmaps. However | |
1650 | * after this first call, and before truncate_inode_pages finishes, | |
1651 | * it is possible for private pages to be COWed, which remain after | |
1652 | * truncate_inode_pages finishes, hence the second unmap_mapping_range | |
1653 | * call must be made for correctness. | |
1654 | */ | |
3677db10 SF |
1655 | unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1); |
1656 | truncate_inode_pages(mapping, offset); | |
8064ab4d | 1657 | unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1); |
3677db10 SF |
1658 | goto out_truncate; |
1659 | ||
1660 | do_expand: | |
1661 | limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur; | |
ba6a46a0 SF |
1662 | if (limit != RLIM_INFINITY && offset > limit) { |
1663 | spin_unlock(&inode->i_lock); | |
3677db10 | 1664 | goto out_sig; |
ba6a46a0 SF |
1665 | } |
1666 | if (offset > inode->i_sb->s_maxbytes) { | |
1667 | spin_unlock(&inode->i_lock); | |
3677db10 | 1668 | goto out_big; |
ba6a46a0 | 1669 | } |
3677db10 | 1670 | i_size_write(inode, offset); |
ba6a46a0 | 1671 | spin_unlock(&inode->i_lock); |
3677db10 | 1672 | out_truncate: |
acfa4380 | 1673 | if (inode->i_op->truncate) |
3677db10 SF |
1674 | inode->i_op->truncate(inode); |
1675 | return 0; | |
1676 | out_sig: | |
1677 | send_sig(SIGXFSZ, current, 0); | |
1678 | out_big: | |
1679 | return -EFBIG; | |
1680 | out_busy: | |
1681 | return -ETXTBSY; | |
1682 | } | |
1683 | ||
8efdbde6 JL |
1684 | static int |
1685 | cifs_set_file_size(struct inode *inode, struct iattr *attrs, | |
1686 | int xid, char *full_path) | |
1687 | { | |
1688 | int rc; | |
1689 | struct cifsFileInfo *open_file; | |
1690 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); | |
1691 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
1692 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
1693 | ||
1694 | /* | |
1695 | * To avoid spurious oplock breaks from server, in the case of | |
1696 | * inodes that we already have open, avoid doing path based | |
1697 | * setting of file size if we can do it by handle. | |
1698 | * This keeps our caching token (oplock) and avoids timeouts | |
1699 | * when the local oplock break takes longer to flush | |
1700 | * writebehind data than the SMB timeout for the SetPathInfo | |
1701 | * request would allow | |
1702 | */ | |
1703 | open_file = find_writable_file(cifsInode); | |
1704 | if (open_file) { | |
1705 | __u16 nfid = open_file->netfid; | |
1706 | __u32 npid = open_file->pid; | |
1707 | rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size, nfid, | |
1708 | npid, false); | |
1709 | atomic_dec(&open_file->wrtPending); | |
1710 | cFYI(1, ("SetFSize for attrs rc = %d", rc)); | |
1711 | if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { | |
1712 | unsigned int bytes_written; | |
1713 | rc = CIFSSMBWrite(xid, pTcon, nfid, 0, attrs->ia_size, | |
1714 | &bytes_written, NULL, NULL, 1); | |
1715 | cFYI(1, ("Wrt seteof rc %d", rc)); | |
1716 | } | |
1717 | } else | |
1718 | rc = -EINVAL; | |
1719 | ||
1720 | if (rc != 0) { | |
1721 | /* Set file size by pathname rather than by handle | |
1722 | either because no valid, writeable file handle for | |
1723 | it was found or because there was an error setting | |
1724 | it by handle */ | |
1725 | rc = CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, | |
1726 | false, cifs_sb->local_nls, | |
1727 | cifs_sb->mnt_cifs_flags & | |
1728 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1729 | cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc)); | |
1730 | if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { | |
1731 | __u16 netfid; | |
1732 | int oplock = 0; | |
1733 | ||
1734 | rc = SMBLegacyOpen(xid, pTcon, full_path, | |
1735 | FILE_OPEN, GENERIC_WRITE, | |
1736 | CREATE_NOT_DIR, &netfid, &oplock, NULL, | |
1737 | cifs_sb->local_nls, | |
1738 | cifs_sb->mnt_cifs_flags & | |
1739 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1740 | if (rc == 0) { | |
1741 | unsigned int bytes_written; | |
1742 | rc = CIFSSMBWrite(xid, pTcon, netfid, 0, | |
1743 | attrs->ia_size, | |
1744 | &bytes_written, NULL, | |
1745 | NULL, 1); | |
1746 | cFYI(1, ("wrt seteof rc %d", rc)); | |
1747 | CIFSSMBClose(xid, pTcon, netfid); | |
1748 | } | |
1749 | } | |
1750 | } | |
1751 | ||
1752 | if (rc == 0) { | |
1753 | rc = cifs_vmtruncate(inode, attrs->ia_size); | |
1754 | cifs_truncate_page(inode->i_mapping, inode->i_size); | |
1755 | } | |
1756 | ||
1757 | return rc; | |
1758 | } | |
1759 | ||
3fe5c1dd JL |
1760 | static int |
1761 | cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs) | |
1762 | { | |
1763 | int rc; | |
1764 | int xid; | |
1765 | char *full_path = NULL; | |
1766 | struct inode *inode = direntry->d_inode; | |
1767 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); | |
1768 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
1769 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
1770 | struct cifs_unix_set_info_args *args = NULL; | |
1771 | ||
1772 | cFYI(1, ("setattr_unix on file %s attrs->ia_valid=0x%x", | |
1773 | direntry->d_name.name, attrs->ia_valid)); | |
1774 | ||
1775 | xid = GetXid(); | |
1776 | ||
1777 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) { | |
1778 | /* check if we have permission to change attrs */ | |
1779 | rc = inode_change_ok(inode, attrs); | |
1780 | if (rc < 0) | |
1781 | goto out; | |
1782 | else | |
1783 | rc = 0; | |
1784 | } | |
1785 | ||
1786 | full_path = build_path_from_dentry(direntry); | |
1787 | if (full_path == NULL) { | |
1788 | rc = -ENOMEM; | |
1789 | goto out; | |
1790 | } | |
1791 | ||
1792 | if ((attrs->ia_valid & ATTR_MTIME) || (attrs->ia_valid & ATTR_SIZE)) { | |
1793 | /* | |
1794 | Flush data before changing file size or changing the last | |
1795 | write time of the file on the server. If the | |
1796 | flush returns error, store it to report later and continue. | |
1797 | BB: This should be smarter. Why bother flushing pages that | |
1798 | will be truncated anyway? Also, should we error out here if | |
1799 | the flush returns error? | |
1800 | */ | |
1801 | rc = filemap_write_and_wait(inode->i_mapping); | |
1802 | if (rc != 0) { | |
1803 | cifsInode->write_behind_rc = rc; | |
1804 | rc = 0; | |
1805 | } | |
1806 | } | |
1807 | ||
1808 | if (attrs->ia_valid & ATTR_SIZE) { | |
1809 | rc = cifs_set_file_size(inode, attrs, xid, full_path); | |
1810 | if (rc != 0) | |
1811 | goto out; | |
1812 | } | |
1813 | ||
1814 | /* skip mode change if it's just for clearing setuid/setgid */ | |
1815 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) | |
1816 | attrs->ia_valid &= ~ATTR_MODE; | |
1817 | ||
1818 | args = kmalloc(sizeof(*args), GFP_KERNEL); | |
1819 | if (args == NULL) { | |
1820 | rc = -ENOMEM; | |
1821 | goto out; | |
1822 | } | |
1823 | ||
1824 | /* set up the struct */ | |
1825 | if (attrs->ia_valid & ATTR_MODE) | |
1826 | args->mode = attrs->ia_mode; | |
1827 | else | |
1828 | args->mode = NO_CHANGE_64; | |
1829 | ||
1830 | if (attrs->ia_valid & ATTR_UID) | |
1831 | args->uid = attrs->ia_uid; | |
1832 | else | |
1833 | args->uid = NO_CHANGE_64; | |
1834 | ||
1835 | if (attrs->ia_valid & ATTR_GID) | |
1836 | args->gid = attrs->ia_gid; | |
1837 | else | |
1838 | args->gid = NO_CHANGE_64; | |
1839 | ||
1840 | if (attrs->ia_valid & ATTR_ATIME) | |
1841 | args->atime = cifs_UnixTimeToNT(attrs->ia_atime); | |
1842 | else | |
1843 | args->atime = NO_CHANGE_64; | |
1844 | ||
1845 | if (attrs->ia_valid & ATTR_MTIME) | |
1846 | args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime); | |
1847 | else | |
1848 | args->mtime = NO_CHANGE_64; | |
1849 | ||
1850 | if (attrs->ia_valid & ATTR_CTIME) | |
1851 | args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime); | |
1852 | else | |
1853 | args->ctime = NO_CHANGE_64; | |
1854 | ||
1855 | args->device = 0; | |
1856 | rc = CIFSSMBUnixSetInfo(xid, pTcon, full_path, args, | |
1857 | cifs_sb->local_nls, | |
1858 | cifs_sb->mnt_cifs_flags & | |
1859 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1860 | ||
1861 | if (!rc) | |
1862 | rc = inode_setattr(inode, attrs); | |
1863 | out: | |
1864 | kfree(args); | |
1865 | kfree(full_path); | |
1866 | FreeXid(xid); | |
1867 | return rc; | |
1868 | } | |
1869 | ||
0510eeb7 JL |
1870 | static int |
1871 | cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs) | |
1da177e4 LT |
1872 | { |
1873 | int xid; | |
3fe5c1dd JL |
1874 | struct inode *inode = direntry->d_inode; |
1875 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
3fe5c1dd | 1876 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
1da177e4 LT |
1877 | char *full_path = NULL; |
1878 | int rc = -EACCES; | |
feb3e20c | 1879 | __u32 dosattr = 0; |
4e1e7fb9 | 1880 | __u64 mode = NO_CHANGE_64; |
3fe5c1dd | 1881 | |
1da177e4 LT |
1882 | xid = GetXid(); |
1883 | ||
3979877e | 1884 | cFYI(1, ("setattr on file %s attrs->iavalid 0x%x", |
1da177e4 | 1885 | direntry->d_name.name, attrs->ia_valid)); |
6473a559 | 1886 | |
2a138ebb | 1887 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) { |
6473a559 | 1888 | /* check if we have permission to change attrs */ |
02eadeff | 1889 | rc = inode_change_ok(inode, attrs); |
fb8c4b14 | 1890 | if (rc < 0) { |
6473a559 SF |
1891 | FreeXid(xid); |
1892 | return rc; | |
1893 | } else | |
1894 | rc = 0; | |
1895 | } | |
50c2f753 | 1896 | |
7f57356b | 1897 | full_path = build_path_from_dentry(direntry); |
1da177e4 LT |
1898 | if (full_path == NULL) { |
1899 | FreeXid(xid); | |
1900 | return -ENOMEM; | |
1901 | } | |
1da177e4 | 1902 | |
50531444 | 1903 | if ((attrs->ia_valid & ATTR_MTIME) || (attrs->ia_valid & ATTR_SIZE)) { |
cea21805 | 1904 | /* |
50531444 SF |
1905 | Flush data before changing file size or changing the last |
1906 | write time of the file on the server. If the | |
cea21805 JL |
1907 | flush returns error, store it to report later and continue. |
1908 | BB: This should be smarter. Why bother flushing pages that | |
1909 | will be truncated anyway? Also, should we error out here if | |
1910 | the flush returns error? | |
1911 | */ | |
02eadeff | 1912 | rc = filemap_write_and_wait(inode->i_mapping); |
cea21805 | 1913 | if (rc != 0) { |
02eadeff | 1914 | cifsInode->write_behind_rc = rc; |
cea21805 JL |
1915 | rc = 0; |
1916 | } | |
50531444 | 1917 | } |
cea21805 | 1918 | |
50531444 | 1919 | if (attrs->ia_valid & ATTR_SIZE) { |
8efdbde6 JL |
1920 | rc = cifs_set_file_size(inode, attrs, xid, full_path); |
1921 | if (rc != 0) | |
e30dcf3a | 1922 | goto cifs_setattr_exit; |
1da177e4 | 1923 | } |
4ca691a8 JL |
1924 | |
1925 | /* | |
1926 | * Without unix extensions we can't send ownership changes to the | |
1927 | * server, so silently ignore them. This is consistent with how | |
1928 | * local DOS/Windows filesystems behave (VFAT, NTFS, etc). With | |
1929 | * CIFSACL support + proper Windows to Unix idmapping, we may be | |
1930 | * able to support this in the future. | |
1931 | */ | |
3fe5c1dd | 1932 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) |
4ca691a8 | 1933 | attrs->ia_valid &= ~(ATTR_UID | ATTR_GID); |
1da177e4 | 1934 | |
d32c4f26 JL |
1935 | /* skip mode change if it's just for clearing setuid/setgid */ |
1936 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) | |
1937 | attrs->ia_valid &= ~ATTR_MODE; | |
1938 | ||
1da177e4 | 1939 | if (attrs->ia_valid & ATTR_MODE) { |
5132861a | 1940 | cFYI(1, ("Mode changed to 0%o", attrs->ia_mode)); |
1da177e4 | 1941 | mode = attrs->ia_mode; |
1da177e4 LT |
1942 | } |
1943 | ||
3fe5c1dd | 1944 | if (attrs->ia_valid & ATTR_MODE) { |
cdbce9c8 | 1945 | rc = 0; |
97837582 SF |
1946 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
1947 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) | |
02eadeff | 1948 | rc = mode_to_acl(inode, full_path, mode); |
5132861a | 1949 | else |
97837582 | 1950 | #endif |
5132861a JL |
1951 | if (((mode & S_IWUGO) == 0) && |
1952 | (cifsInode->cifsAttrs & ATTR_READONLY) == 0) { | |
feb3e20c JL |
1953 | |
1954 | dosattr = cifsInode->cifsAttrs | ATTR_READONLY; | |
1955 | ||
5132861a JL |
1956 | /* fix up mode if we're not using dynperm */ |
1957 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0) | |
1958 | attrs->ia_mode = inode->i_mode & ~S_IWUGO; | |
1959 | } else if ((mode & S_IWUGO) && | |
1960 | (cifsInode->cifsAttrs & ATTR_READONLY)) { | |
feb3e20c JL |
1961 | |
1962 | dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY; | |
1963 | /* Attributes of 0 are ignored */ | |
1964 | if (dosattr == 0) | |
1965 | dosattr |= ATTR_NORMAL; | |
5132861a JL |
1966 | |
1967 | /* reset local inode permissions to normal */ | |
1968 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { | |
1969 | attrs->ia_mode &= ~(S_IALLUGO); | |
1970 | if (S_ISDIR(inode->i_mode)) | |
1971 | attrs->ia_mode |= | |
1972 | cifs_sb->mnt_dir_mode; | |
1973 | else | |
1974 | attrs->ia_mode |= | |
1975 | cifs_sb->mnt_file_mode; | |
1976 | } | |
1977 | } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { | |
1978 | /* ignore mode change - ATTR_READONLY hasn't changed */ | |
1979 | attrs->ia_valid &= ~ATTR_MODE; | |
1da177e4 | 1980 | } |
1da177e4 LT |
1981 | } |
1982 | ||
feb3e20c JL |
1983 | if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) || |
1984 | ((attrs->ia_valid & ATTR_MODE) && dosattr)) { | |
1985 | rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); | |
1986 | /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */ | |
1da177e4 | 1987 | |
e30dcf3a SF |
1988 | /* Even if error on time set, no sense failing the call if |
1989 | the server would set the time to a reasonable value anyway, | |
1990 | and this check ensures that we are not being called from | |
1991 | sys_utimes in which case we ought to fail the call back to | |
1992 | the user when the server rejects the call */ | |
fb8c4b14 | 1993 | if ((rc) && (attrs->ia_valid & |
feb3e20c | 1994 | (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE))) |
e30dcf3a | 1995 | rc = 0; |
1da177e4 LT |
1996 | } |
1997 | ||
1998 | /* do not need local check to inode_check_ok since the server does | |
1999 | that */ | |
2000 | if (!rc) | |
02eadeff | 2001 | rc = inode_setattr(inode, attrs); |
e30dcf3a | 2002 | cifs_setattr_exit: |
1da177e4 LT |
2003 | kfree(full_path); |
2004 | FreeXid(xid); | |
2005 | return rc; | |
2006 | } | |
2007 | ||
0510eeb7 JL |
2008 | int |
2009 | cifs_setattr(struct dentry *direntry, struct iattr *attrs) | |
2010 | { | |
2011 | struct inode *inode = direntry->d_inode; | |
2012 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
2013 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
2014 | ||
2015 | if (pTcon->unix_ext) | |
2016 | return cifs_setattr_unix(direntry, attrs); | |
2017 | ||
2018 | return cifs_setattr_nounix(direntry, attrs); | |
2019 | ||
2020 | /* BB: add cifs_setattr_legacy for really old servers */ | |
2021 | } | |
2022 | ||
99ee4dbd | 2023 | #if 0 |
1da177e4 LT |
2024 | void cifs_delete_inode(struct inode *inode) |
2025 | { | |
26a21b98 | 2026 | cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode)); |
1da177e4 LT |
2027 | /* may have to add back in if and when safe distributed caching of |
2028 | directories added e.g. via FindNotify */ | |
2029 | } | |
99ee4dbd | 2030 | #endif |