Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * fs/cifs/inode.c | |
3 | * | |
2dd29d31 | 4 | * Copyright (C) International Business Machines Corp., 2002,2007 |
1da177e4 LT |
5 | * Author(s): Steve French (sfrench@us.ibm.com) |
6 | * | |
7 | * This library is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU Lesser General Public License as published | |
9 | * by the Free Software Foundation; either version 2.1 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This library is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
15 | * the GNU Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public License | |
18 | * along with this library; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
21 | #include <linux/fs.h> | |
1da177e4 LT |
22 | #include <linux/stat.h> |
23 | #include <linux/pagemap.h> | |
24 | #include <asm/div64.h> | |
25 | #include "cifsfs.h" | |
26 | #include "cifspdu.h" | |
27 | #include "cifsglob.h" | |
28 | #include "cifsproto.h" | |
29 | #include "cifs_debug.h" | |
30 | #include "cifs_fs_sb.h" | |
31 | ||
70eff55d | 32 | |
7962670e | 33 | static void cifs_set_ops(struct inode *inode, const bool is_dfs_referral) |
70eff55d CH |
34 | { |
35 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
36 | ||
37 | switch (inode->i_mode & S_IFMT) { | |
38 | case S_IFREG: | |
39 | inode->i_op = &cifs_file_inode_ops; | |
40 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { | |
41 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
42 | inode->i_fop = &cifs_file_direct_nobrl_ops; | |
43 | else | |
44 | inode->i_fop = &cifs_file_direct_ops; | |
45 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
46 | inode->i_fop = &cifs_file_nobrl_ops; | |
47 | else { /* not direct, send byte range locks */ | |
48 | inode->i_fop = &cifs_file_ops; | |
49 | } | |
50 | ||
51 | ||
52 | /* check if server can support readpages */ | |
53 | if (cifs_sb->tcon->ses->server->maxBuf < | |
54 | PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE) | |
55 | inode->i_data.a_ops = &cifs_addr_ops_smallbuf; | |
56 | else | |
57 | inode->i_data.a_ops = &cifs_addr_ops; | |
58 | break; | |
59 | case S_IFDIR: | |
bc5b6e24 | 60 | #ifdef CONFIG_CIFS_DFS_UPCALL |
7962670e IM |
61 | if (is_dfs_referral) { |
62 | inode->i_op = &cifs_dfs_referral_inode_operations; | |
63 | } else { | |
bc5b6e24 SF |
64 | #else /* NO DFS support, treat as a directory */ |
65 | { | |
66 | #endif | |
7962670e IM |
67 | inode->i_op = &cifs_dir_inode_ops; |
68 | inode->i_fop = &cifs_dir_ops; | |
69 | } | |
70eff55d CH |
70 | break; |
71 | case S_IFLNK: | |
72 | inode->i_op = &cifs_symlink_inode_ops; | |
73 | break; | |
74 | default: | |
75 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
76 | break; | |
77 | } | |
78 | } | |
79 | ||
75f12983 CH |
80 | static void cifs_unix_info_to_inode(struct inode *inode, |
81 | FILE_UNIX_BASIC_INFO *info, int force_uid_gid) | |
82 | { | |
83 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
84 | struct cifsInodeInfo *cifsInfo = CIFS_I(inode); | |
85 | __u64 num_of_bytes = le64_to_cpu(info->NumOfBytes); | |
86 | __u64 end_of_file = le64_to_cpu(info->EndOfFile); | |
87 | ||
88 | inode->i_atime = cifs_NTtimeToUnix(le64_to_cpu(info->LastAccessTime)); | |
89 | inode->i_mtime = | |
90 | cifs_NTtimeToUnix(le64_to_cpu(info->LastModificationTime)); | |
91 | inode->i_ctime = cifs_NTtimeToUnix(le64_to_cpu(info->LastStatusChange)); | |
92 | inode->i_mode = le64_to_cpu(info->Permissions); | |
93 | ||
94 | /* | |
95 | * Since we set the inode type below we need to mask off | |
96 | * to avoid strange results if bits set above. | |
97 | */ | |
98 | inode->i_mode &= ~S_IFMT; | |
99 | switch (le32_to_cpu(info->Type)) { | |
100 | case UNIX_FILE: | |
101 | inode->i_mode |= S_IFREG; | |
102 | break; | |
103 | case UNIX_SYMLINK: | |
104 | inode->i_mode |= S_IFLNK; | |
105 | break; | |
106 | case UNIX_DIR: | |
107 | inode->i_mode |= S_IFDIR; | |
108 | break; | |
109 | case UNIX_CHARDEV: | |
110 | inode->i_mode |= S_IFCHR; | |
111 | inode->i_rdev = MKDEV(le64_to_cpu(info->DevMajor), | |
112 | le64_to_cpu(info->DevMinor) & MINORMASK); | |
113 | break; | |
114 | case UNIX_BLOCKDEV: | |
115 | inode->i_mode |= S_IFBLK; | |
116 | inode->i_rdev = MKDEV(le64_to_cpu(info->DevMajor), | |
117 | le64_to_cpu(info->DevMinor) & MINORMASK); | |
118 | break; | |
119 | case UNIX_FIFO: | |
120 | inode->i_mode |= S_IFIFO; | |
121 | break; | |
122 | case UNIX_SOCKET: | |
123 | inode->i_mode |= S_IFSOCK; | |
124 | break; | |
125 | default: | |
126 | /* safest to call it a file if we do not know */ | |
127 | inode->i_mode |= S_IFREG; | |
128 | cFYI(1, ("unknown type %d", le32_to_cpu(info->Type))); | |
129 | break; | |
130 | } | |
131 | ||
132 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) && | |
133 | !force_uid_gid) | |
134 | inode->i_uid = cifs_sb->mnt_uid; | |
135 | else | |
136 | inode->i_uid = le64_to_cpu(info->Uid); | |
137 | ||
138 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) && | |
139 | !force_uid_gid) | |
140 | inode->i_gid = cifs_sb->mnt_gid; | |
141 | else | |
142 | inode->i_gid = le64_to_cpu(info->Gid); | |
143 | ||
144 | inode->i_nlink = le64_to_cpu(info->Nlinks); | |
145 | ||
146 | spin_lock(&inode->i_lock); | |
147 | if (is_size_safe_to_change(cifsInfo, end_of_file)) { | |
148 | /* | |
149 | * We can not safely change the file size here if the client | |
150 | * is writing to it due to potential races. | |
151 | */ | |
152 | i_size_write(inode, end_of_file); | |
153 | ||
154 | /* | |
155 | * i_blocks is not related to (i_size / i_blksize), | |
156 | * but instead 512 byte (2**9) size is required for | |
157 | * calculating num blocks. | |
158 | */ | |
159 | inode->i_blocks = (512 - 1 + num_of_bytes) >> 9; | |
160 | } | |
161 | spin_unlock(&inode->i_lock); | |
162 | } | |
163 | ||
7962670e IM |
164 | static const unsigned char *cifs_get_search_path(struct cifsTconInfo *pTcon, |
165 | const char *search_path) | |
166 | { | |
167 | int tree_len; | |
168 | int path_len; | |
169 | char *tmp_path; | |
170 | ||
171 | if (!(pTcon->Flags & SMB_SHARE_IS_IN_DFS)) | |
172 | return search_path; | |
173 | ||
174 | /* use full path name for working with DFS */ | |
175 | tree_len = strnlen(pTcon->treeName, MAX_TREE_SIZE + 1); | |
176 | path_len = strnlen(search_path, MAX_PATHCONF); | |
177 | ||
178 | tmp_path = kmalloc(tree_len+path_len+1, GFP_KERNEL); | |
179 | if (tmp_path == NULL) | |
180 | return search_path; | |
181 | ||
182 | strncpy(tmp_path, pTcon->treeName, tree_len); | |
183 | strncpy(tmp_path+tree_len, search_path, path_len); | |
184 | tmp_path[tree_len+path_len] = 0; | |
185 | return tmp_path; | |
186 | } | |
187 | ||
1da177e4 LT |
188 | int cifs_get_inode_info_unix(struct inode **pinode, |
189 | const unsigned char *search_path, struct super_block *sb, int xid) | |
190 | { | |
191 | int rc = 0; | |
192 | FILE_UNIX_BASIC_INFO findData; | |
193 | struct cifsTconInfo *pTcon; | |
194 | struct inode *inode; | |
195 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
7962670e IM |
196 | const unsigned char *full_path; |
197 | bool is_dfs_referral = false; | |
1da177e4 LT |
198 | |
199 | pTcon = cifs_sb->tcon; | |
26a21b98 | 200 | cFYI(1, ("Getting info on %s", search_path)); |
7962670e IM |
201 | |
202 | full_path = cifs_get_search_path(pTcon, search_path); | |
203 | ||
204 | try_again_CIFSSMBUnixQPathInfo: | |
1da177e4 | 205 | /* could have done a find first instead but this returns more info */ |
7962670e | 206 | rc = CIFSSMBUnixQPathInfo(xid, pTcon, full_path, &findData, |
737b758c SF |
207 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
208 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
209 | /* dump_mem("\nUnixQPathInfo return data", &findData, |
210 | sizeof(findData)); */ | |
211 | if (rc) { | |
7962670e IM |
212 | if (rc == -EREMOTE && !is_dfs_referral) { |
213 | is_dfs_referral = true; | |
04b6e6ec SF |
214 | if (full_path != search_path) { |
215 | kfree(full_path); | |
216 | full_path = search_path; | |
217 | } | |
7962670e | 218 | goto try_again_CIFSSMBUnixQPathInfo; |
1da177e4 | 219 | } |
7962670e | 220 | goto cgiiu_exit; |
1da177e4 LT |
221 | } else { |
222 | struct cifsInodeInfo *cifsInfo; | |
1da177e4 LT |
223 | __u64 num_of_bytes = le64_to_cpu(findData.NumOfBytes); |
224 | __u64 end_of_file = le64_to_cpu(findData.EndOfFile); | |
225 | ||
226 | /* get new inode */ | |
227 | if (*pinode == NULL) { | |
228 | *pinode = new_inode(sb); | |
7962670e IM |
229 | if (*pinode == NULL) { |
230 | rc = -ENOMEM; | |
231 | goto cgiiu_exit; | |
232 | } | |
1da177e4 LT |
233 | /* Is an i_ino of zero legal? */ |
234 | /* Are there sanity checks we can use to ensure that | |
235 | the server is really filling in that field? */ | |
d0d2f2df | 236 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
1da177e4 LT |
237 | (*pinode)->i_ino = |
238 | (unsigned long)findData.UniqueId; | |
239 | } /* note ino incremented to unique num in new_inode */ | |
4523cc30 | 240 | if (sb->s_flags & MS_NOATIME) |
1b2b2126 | 241 | (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME; |
50c2f753 | 242 | |
1da177e4 LT |
243 | insert_inode_hash(*pinode); |
244 | } | |
245 | ||
246 | inode = *pinode; | |
247 | cifsInfo = CIFS_I(inode); | |
248 | ||
26a21b98 | 249 | cFYI(1, ("Old time %ld", cifsInfo->time)); |
1da177e4 | 250 | cifsInfo->time = jiffies; |
26a21b98 | 251 | cFYI(1, ("New time %ld", cifsInfo->time)); |
1da177e4 | 252 | /* this is ok to set on every inode revalidate */ |
fb8c4b14 | 253 | atomic_set(&cifsInfo->inUse, 1); |
1da177e4 | 254 | |
75f12983 | 255 | cifs_unix_info_to_inode(inode, &findData, 0); |
1da177e4 | 256 | |
1da177e4 LT |
257 | |
258 | if (num_of_bytes < end_of_file) | |
8b94bcb9 | 259 | cFYI(1, ("allocation size less than end of file")); |
5515eff8 AM |
260 | cFYI(1, ("Size %ld and blocks %llu", |
261 | (unsigned long) inode->i_size, | |
262 | (unsigned long long)inode->i_blocks)); | |
70eff55d | 263 | |
7962670e | 264 | cifs_set_ops(inode, is_dfs_referral); |
1da177e4 | 265 | } |
7962670e IM |
266 | cgiiu_exit: |
267 | if (full_path != search_path) | |
268 | kfree(full_path); | |
1da177e4 LT |
269 | return rc; |
270 | } | |
271 | ||
fb8c4b14 | 272 | static int decode_sfu_inode(struct inode *inode, __u64 size, |
d6e2f2a4 SF |
273 | const unsigned char *path, |
274 | struct cifs_sb_info *cifs_sb, int xid) | |
275 | { | |
276 | int rc; | |
277 | int oplock = FALSE; | |
278 | __u16 netfid; | |
279 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
86c96b4b | 280 | char buf[24]; |
d6e2f2a4 | 281 | unsigned int bytes_read; |
fb8c4b14 | 282 | char *pbuf; |
d6e2f2a4 SF |
283 | |
284 | pbuf = buf; | |
285 | ||
4523cc30 | 286 | if (size == 0) { |
d6e2f2a4 SF |
287 | inode->i_mode |= S_IFIFO; |
288 | return 0; | |
289 | } else if (size < 8) { | |
290 | return -EINVAL; /* EOPNOTSUPP? */ | |
291 | } | |
50c2f753 | 292 | |
d6e2f2a4 SF |
293 | rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ, |
294 | CREATE_NOT_DIR, &netfid, &oplock, NULL, | |
295 | cifs_sb->local_nls, | |
296 | cifs_sb->mnt_cifs_flags & | |
297 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
fb8c4b14 | 298 | if (rc == 0) { |
ec637e3f | 299 | int buf_type = CIFS_NO_BUFFER; |
d6e2f2a4 SF |
300 | /* Read header */ |
301 | rc = CIFSSMBRead(xid, pTcon, | |
fb8c4b14 | 302 | netfid, |
86c96b4b | 303 | 24 /* length */, 0 /* offset */, |
ec637e3f | 304 | &bytes_read, &pbuf, &buf_type); |
4523cc30 SF |
305 | if ((rc == 0) && (bytes_read >= 8)) { |
306 | if (memcmp("IntxBLK", pbuf, 8) == 0) { | |
fb8c4b14 | 307 | cFYI(1, ("Block device")); |
3020a1f5 | 308 | inode->i_mode |= S_IFBLK; |
4523cc30 | 309 | if (bytes_read == 24) { |
86c96b4b SF |
310 | /* we have enough to decode dev num */ |
311 | __u64 mjr; /* major */ | |
312 | __u64 mnr; /* minor */ | |
313 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); | |
314 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); | |
315 | inode->i_rdev = MKDEV(mjr, mnr); | |
316 | } | |
4523cc30 | 317 | } else if (memcmp("IntxCHR", pbuf, 8) == 0) { |
fb8c4b14 | 318 | cFYI(1, ("Char device")); |
3020a1f5 | 319 | inode->i_mode |= S_IFCHR; |
4523cc30 | 320 | if (bytes_read == 24) { |
86c96b4b SF |
321 | /* we have enough to decode dev num */ |
322 | __u64 mjr; /* major */ | |
323 | __u64 mnr; /* minor */ | |
324 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); | |
325 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); | |
326 | inode->i_rdev = MKDEV(mjr, mnr); | |
fb8c4b14 | 327 | } |
4523cc30 | 328 | } else if (memcmp("IntxLNK", pbuf, 7) == 0) { |
fb8c4b14 | 329 | cFYI(1, ("Symlink")); |
3020a1f5 | 330 | inode->i_mode |= S_IFLNK; |
86c96b4b SF |
331 | } else { |
332 | inode->i_mode |= S_IFREG; /* file? */ | |
fb8c4b14 | 333 | rc = -EOPNOTSUPP; |
86c96b4b | 334 | } |
3020a1f5 SF |
335 | } else { |
336 | inode->i_mode |= S_IFREG; /* then it is a file */ | |
fb8c4b14 SF |
337 | rc = -EOPNOTSUPP; /* or some unknown SFU type */ |
338 | } | |
d6e2f2a4 | 339 | CIFSSMBClose(xid, pTcon, netfid); |
d6e2f2a4 SF |
340 | } |
341 | return rc; | |
d6e2f2a4 SF |
342 | } |
343 | ||
9e294f1c SF |
344 | #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */ |
345 | ||
953f8681 | 346 | static int get_sfu_mode(struct inode *inode, |
9e294f1c SF |
347 | const unsigned char *path, |
348 | struct cifs_sb_info *cifs_sb, int xid) | |
349 | { | |
3020a1f5 | 350 | #ifdef CONFIG_CIFS_XATTR |
9e294f1c SF |
351 | ssize_t rc; |
352 | char ea_value[4]; | |
353 | __u32 mode; | |
354 | ||
355 | rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS", | |
356 | ea_value, 4 /* size of buf */, cifs_sb->local_nls, | |
fb8c4b14 | 357 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
4523cc30 | 358 | if (rc < 0) |
9e294f1c SF |
359 | return (int)rc; |
360 | else if (rc > 3) { | |
361 | mode = le32_to_cpu(*((__le32 *)ea_value)); | |
fb8c4b14 SF |
362 | inode->i_mode &= ~SFBITS_MASK; |
363 | cFYI(1, ("special bits 0%o org mode 0%o", mode, inode->i_mode)); | |
9e294f1c | 364 | inode->i_mode = (mode & SFBITS_MASK) | inode->i_mode; |
fb8c4b14 | 365 | cFYI(1, ("special mode bits 0%o", mode)); |
9e294f1c SF |
366 | return 0; |
367 | } else { | |
368 | return 0; | |
369 | } | |
3020a1f5 SF |
370 | #else |
371 | return -EOPNOTSUPP; | |
372 | #endif | |
9e294f1c SF |
373 | } |
374 | ||
1da177e4 LT |
375 | int cifs_get_inode_info(struct inode **pinode, |
376 | const unsigned char *search_path, FILE_ALL_INFO *pfindData, | |
8b1327f6 | 377 | struct super_block *sb, int xid, const __u16 *pfid) |
1da177e4 LT |
378 | { |
379 | int rc = 0; | |
380 | struct cifsTconInfo *pTcon; | |
381 | struct inode *inode; | |
382 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
7962670e | 383 | const unsigned char *full_path = NULL; |
1da177e4 | 384 | char *buf = NULL; |
8d6286fd | 385 | int adjustTZ = FALSE; |
7962670e | 386 | bool is_dfs_referral = false; |
1da177e4 LT |
387 | |
388 | pTcon = cifs_sb->tcon; | |
fb8c4b14 | 389 | cFYI(1, ("Getting info on %s", search_path)); |
1da177e4 | 390 | |
d0d2f2df SF |
391 | if ((pfindData == NULL) && (*pinode != NULL)) { |
392 | if (CIFS_I(*pinode)->clientCanCacheRead) { | |
fb8c4b14 | 393 | cFYI(1, ("No need to revalidate cached inode sizes")); |
1da177e4 LT |
394 | return rc; |
395 | } | |
396 | } | |
397 | ||
398 | /* if file info not passed in then get it from server */ | |
d0d2f2df | 399 | if (pfindData == NULL) { |
1da177e4 | 400 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
d0d2f2df | 401 | if (buf == NULL) |
1da177e4 LT |
402 | return -ENOMEM; |
403 | pfindData = (FILE_ALL_INFO *)buf; | |
7962670e IM |
404 | |
405 | full_path = cifs_get_search_path(pTcon, search_path); | |
406 | ||
407 | try_again_CIFSSMBQPathInfo: | |
1da177e4 | 408 | /* could do find first instead but this returns more info */ |
7962670e | 409 | rc = CIFSSMBQPathInfo(xid, pTcon, full_path, pfindData, |
acf1a1b1 | 410 | 0 /* not legacy */, |
6b8edfe0 | 411 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
737b758c | 412 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
6b8edfe0 SF |
413 | /* BB optimize code so we do not make the above call |
414 | when server claims no NT SMB support and the above call | |
415 | failed at least once - set flag in tcon or mount */ | |
4523cc30 | 416 | if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) { |
7962670e | 417 | rc = SMBQueryInformation(xid, pTcon, full_path, |
fb8c4b14 | 418 | pfindData, cifs_sb->local_nls, |
6b8edfe0 SF |
419 | cifs_sb->mnt_cifs_flags & |
420 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
8d6286fd | 421 | adjustTZ = TRUE; |
6b8edfe0 | 422 | } |
1da177e4 LT |
423 | } |
424 | /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */ | |
425 | if (rc) { | |
7962670e IM |
426 | if (rc == -EREMOTE && !is_dfs_referral) { |
427 | is_dfs_referral = true; | |
04b6e6ec SF |
428 | if (full_path != search_path) { |
429 | kfree(full_path); | |
430 | full_path = search_path; | |
431 | } | |
7962670e | 432 | goto try_again_CIFSSMBQPathInfo; |
1da177e4 | 433 | } |
7962670e | 434 | goto cgii_exit; |
1da177e4 LT |
435 | } else { |
436 | struct cifsInodeInfo *cifsInfo; | |
437 | __u32 attr = le32_to_cpu(pfindData->Attributes); | |
438 | ||
439 | /* get new inode */ | |
440 | if (*pinode == NULL) { | |
441 | *pinode = new_inode(sb); | |
acf1a1b1 | 442 | if (*pinode == NULL) { |
7962670e IM |
443 | rc = -ENOMEM; |
444 | goto cgii_exit; | |
acf1a1b1 | 445 | } |
1da177e4 LT |
446 | /* Is an i_ino of zero legal? Can we use that to check |
447 | if the server supports returning inode numbers? Are | |
448 | there other sanity checks we can use to ensure that | |
449 | the server is really filling in that field? */ | |
450 | ||
451 | /* We can not use the IndexNumber field by default from | |
452 | Windows or Samba (in ALL_INFO buf) but we can request | |
453 | it explicitly. It may not be unique presumably if | |
454 | the server has multiple devices mounted under one | |
455 | share */ | |
456 | ||
457 | /* There may be higher info levels that work but are | |
458 | there Windows server or network appliances for which | |
459 | IndexNumber field is not guaranteed unique? */ | |
460 | ||
fb8c4b14 | 461 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
1da177e4 LT |
462 | int rc1 = 0; |
463 | __u64 inode_num; | |
464 | ||
fb8c4b14 SF |
465 | rc1 = CIFSGetSrvInodeNumber(xid, pTcon, |
466 | search_path, &inode_num, | |
737b758c SF |
467 | cifs_sb->local_nls, |
468 | cifs_sb->mnt_cifs_flags & | |
469 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
d0d2f2df | 470 | if (rc1) { |
fb8c4b14 | 471 | cFYI(1, ("GetSrvInodeNum rc %d", rc1)); |
1da177e4 LT |
472 | /* BB EOPNOSUPP disable SERVER_INUM? */ |
473 | } else /* do we need cast or hash to ino? */ | |
474 | (*pinode)->i_ino = inode_num; | |
475 | } /* else ino incremented to unique num in new_inode*/ | |
4523cc30 | 476 | if (sb->s_flags & MS_NOATIME) |
1b2b2126 | 477 | (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME; |
1da177e4 LT |
478 | insert_inode_hash(*pinode); |
479 | } | |
480 | inode = *pinode; | |
481 | cifsInfo = CIFS_I(inode); | |
482 | cifsInfo->cifsAttrs = attr; | |
26a21b98 | 483 | cFYI(1, ("Old time %ld", cifsInfo->time)); |
1da177e4 | 484 | cifsInfo->time = jiffies; |
26a21b98 | 485 | cFYI(1, ("New time %ld", cifsInfo->time)); |
1da177e4 LT |
486 | |
487 | /* blksize needs to be multiple of two. So safer to default to | |
488 | blksize and blkbits set in superblock so 2**blkbits and blksize | |
489 | will match rather than setting to: | |
490 | (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/ | |
491 | ||
26a21b98 | 492 | /* Linux can not store file creation time so ignore it */ |
4523cc30 | 493 | if (pfindData->LastAccessTime) |
1bd5bbcb SF |
494 | inode->i_atime = cifs_NTtimeToUnix |
495 | (le64_to_cpu(pfindData->LastAccessTime)); | |
496 | else /* do not need to use current_fs_time - time not stored */ | |
497 | inode->i_atime = CURRENT_TIME; | |
1da177e4 LT |
498 | inode->i_mtime = |
499 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime)); | |
500 | inode->i_ctime = | |
501 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime)); | |
26a21b98 | 502 | cFYI(0, ("Attributes came in as 0x%x", attr)); |
4523cc30 | 503 | if (adjustTZ && (pTcon->ses) && (pTcon->ses->server)) { |
8d6286fd | 504 | inode->i_ctime.tv_sec += pTcon->ses->server->timeAdj; |
fb8c4b14 | 505 | inode->i_mtime.tv_sec += pTcon->ses->server->timeAdj; |
8d6286fd | 506 | } |
1da177e4 LT |
507 | |
508 | /* set default mode. will override for dirs below */ | |
509 | if (atomic_read(&cifsInfo->inUse) == 0) | |
510 | /* new inode, can safely set these fields */ | |
511 | inode->i_mode = cifs_sb->mnt_file_mode; | |
3020a1f5 | 512 | else /* since we set the inode type below we need to mask off |
fb8c4b14 SF |
513 | to avoid strange results if type changes and both |
514 | get orred in */ | |
515 | inode->i_mode &= ~S_IFMT; | |
1da177e4 LT |
516 | /* if (attr & ATTR_REPARSE) */ |
517 | /* We no longer handle these as symlinks because we could not | |
518 | follow them due to the absolute path with drive letter */ | |
519 | if (attr & ATTR_DIRECTORY) { | |
520 | /* override default perms since we do not do byte range locking | |
521 | on dirs */ | |
522 | inode->i_mode = cifs_sb->mnt_dir_mode; | |
523 | inode->i_mode |= S_IFDIR; | |
eda3c029 SF |
524 | } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) && |
525 | (cifsInfo->cifsAttrs & ATTR_SYSTEM) && | |
526 | /* No need to le64 convert size of zero */ | |
527 | (pfindData->EndOfFile == 0)) { | |
528 | inode->i_mode = cifs_sb->mnt_file_mode; | |
529 | inode->i_mode |= S_IFIFO; | |
d6e2f2a4 SF |
530 | /* BB Finish for SFU style symlinks and devices */ |
531 | } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) && | |
532 | (cifsInfo->cifsAttrs & ATTR_SYSTEM)) { | |
fb8c4b14 | 533 | if (decode_sfu_inode(inode, |
d6e2f2a4 SF |
534 | le64_to_cpu(pfindData->EndOfFile), |
535 | search_path, | |
ad7a2926 | 536 | cifs_sb, xid)) |
fb8c4b14 | 537 | cFYI(1, ("Unrecognized sfu inode type")); |
ad7a2926 | 538 | |
fb8c4b14 | 539 | cFYI(1, ("sfu mode 0%o", inode->i_mode)); |
1da177e4 LT |
540 | } else { |
541 | inode->i_mode |= S_IFREG; | |
542 | /* treat the dos attribute of read-only as read-only | |
543 | mode e.g. 555 */ | |
544 | if (cifsInfo->cifsAttrs & ATTR_READONLY) | |
545 | inode->i_mode &= ~(S_IWUGO); | |
f5c1e2ea AT |
546 | else if ((inode->i_mode & S_IWUGO) == 0) |
547 | /* the ATTR_READONLY flag may have been */ | |
548 | /* changed on server -- set any w bits */ | |
549 | /* allowed by mnt_file_mode */ | |
550 | inode->i_mode |= (S_IWUGO & | |
551 | cifs_sb->mnt_file_mode); | |
1da177e4 LT |
552 | /* BB add code here - |
553 | validate if device or weird share or device type? */ | |
554 | } | |
50c2f753 | 555 | |
3677db10 | 556 | spin_lock(&inode->i_lock); |
f6d09982 SF |
557 | if (is_size_safe_to_change(cifsInfo, |
558 | le64_to_cpu(pfindData->EndOfFile))) { | |
7ba52631 | 559 | /* can not safely shrink the file size here if the |
1da177e4 | 560 | client is writing to it due to potential races */ |
fb8c4b14 | 561 | i_size_write(inode, le64_to_cpu(pfindData->EndOfFile)); |
1da177e4 LT |
562 | |
563 | /* 512 bytes (2**9) is the fake blocksize that must be | |
564 | used for this calculation */ | |
565 | inode->i_blocks = (512 - 1 + le64_to_cpu( | |
566 | pfindData->AllocationSize)) >> 9; | |
567 | } | |
3677db10 | 568 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
569 | |
570 | inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks); | |
571 | ||
fb8c4b14 | 572 | /* BB fill in uid and gid here? with help from winbind? |
1da177e4 | 573 | or retrieve from NTFS stream extended attribute */ |
4879b448 | 574 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
953f8681 | 575 | /* fill in 0777 bits from ACL */ |
4879b448 SF |
576 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { |
577 | cFYI(1, ("Getting mode bits from ACL")); | |
8b1327f6 | 578 | acl_to_uid_mode(inode, search_path, pfid); |
4879b448 SF |
579 | } |
580 | #endif | |
4523cc30 | 581 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { |
953f8681 SF |
582 | /* fill in remaining high mode bits e.g. SUID, VTX */ |
583 | get_sfu_mode(inode, search_path, cifs_sb, xid); | |
9e294f1c | 584 | } else if (atomic_read(&cifsInfo->inUse) == 0) { |
1da177e4 LT |
585 | inode->i_uid = cifs_sb->mnt_uid; |
586 | inode->i_gid = cifs_sb->mnt_gid; | |
587 | /* set so we do not keep refreshing these fields with | |
588 | bad data after user has changed them in memory */ | |
fb8c4b14 | 589 | atomic_set(&cifsInfo->inUse, 1); |
1da177e4 LT |
590 | } |
591 | ||
7962670e | 592 | cifs_set_ops(inode, is_dfs_referral); |
1da177e4 | 593 | } |
7962670e IM |
594 | cgii_exit: |
595 | if (full_path != search_path) | |
596 | kfree(full_path); | |
1da177e4 LT |
597 | kfree(buf); |
598 | return rc; | |
599 | } | |
600 | ||
7f8ed420 SF |
601 | static const struct inode_operations cifs_ipc_inode_ops = { |
602 | .lookup = cifs_lookup, | |
603 | }; | |
604 | ||
1da177e4 | 605 | /* gets root inode */ |
ce634ab2 | 606 | struct inode *cifs_iget(struct super_block *sb, unsigned long ino) |
1da177e4 | 607 | { |
ce634ab2 | 608 | int xid; |
1da177e4 | 609 | struct cifs_sb_info *cifs_sb; |
ce634ab2 DH |
610 | struct inode *inode; |
611 | long rc; | |
612 | ||
613 | inode = iget_locked(sb, ino); | |
614 | if (!inode) | |
615 | return ERR_PTR(-ENOMEM); | |
616 | if (!(inode->i_state & I_NEW)) | |
617 | return inode; | |
1da177e4 LT |
618 | |
619 | cifs_sb = CIFS_SB(inode->i_sb); | |
620 | xid = GetXid(); | |
c18c842b SF |
621 | |
622 | if (cifs_sb->tcon->unix_ext) | |
7f8ed420 | 623 | rc = cifs_get_inode_info_unix(&inode, "", inode->i_sb, xid); |
1da177e4 | 624 | else |
8b1327f6 SF |
625 | rc = cifs_get_inode_info(&inode, "", NULL, inode->i_sb, xid, |
626 | NULL); | |
7f8ed420 SF |
627 | if (rc && cifs_sb->tcon->ipc) { |
628 | cFYI(1, ("ipc connection - fake read inode")); | |
629 | inode->i_mode |= S_IFDIR; | |
630 | inode->i_nlink = 2; | |
631 | inode->i_op = &cifs_ipc_inode_ops; | |
632 | inode->i_fop = &simple_dir_operations; | |
633 | inode->i_uid = cifs_sb->mnt_uid; | |
634 | inode->i_gid = cifs_sb->mnt_gid; | |
ce634ab2 DH |
635 | _FreeXid(xid); |
636 | iget_failed(inode); | |
637 | return ERR_PTR(rc); | |
7f8ed420 SF |
638 | } |
639 | ||
ce634ab2 DH |
640 | unlock_new_inode(inode); |
641 | ||
642 | /* can not call macro FreeXid here since in a void func | |
643 | * TODO: This is no longer true | |
644 | */ | |
1da177e4 | 645 | _FreeXid(xid); |
ce634ab2 | 646 | return inode; |
1da177e4 LT |
647 | } |
648 | ||
649 | int cifs_unlink(struct inode *inode, struct dentry *direntry) | |
650 | { | |
651 | int rc = 0; | |
652 | int xid; | |
653 | struct cifs_sb_info *cifs_sb; | |
654 | struct cifsTconInfo *pTcon; | |
655 | char *full_path = NULL; | |
656 | struct cifsInodeInfo *cifsInode; | |
657 | FILE_BASIC_INFO *pinfo_buf; | |
658 | ||
06bcfedd | 659 | cFYI(1, ("cifs_unlink, inode = 0x%p", inode)); |
1da177e4 LT |
660 | |
661 | xid = GetXid(); | |
662 | ||
4523cc30 | 663 | if (inode) |
6910ab30 SF |
664 | cifs_sb = CIFS_SB(inode->i_sb); |
665 | else | |
06bcfedd | 666 | cifs_sb = CIFS_SB(direntry->d_sb); |
1da177e4 LT |
667 | pTcon = cifs_sb->tcon; |
668 | ||
669 | /* Unlink can be called from rename so we can not grab the sem here | |
670 | since we deadlock otherwise */ | |
a11f3a05 | 671 | /* mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/ |
7f57356b | 672 | full_path = build_path_from_dentry(direntry); |
a11f3a05 | 673 | /* mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/ |
1da177e4 LT |
674 | if (full_path == NULL) { |
675 | FreeXid(xid); | |
676 | return -ENOMEM; | |
677 | } | |
2d785a50 SF |
678 | |
679 | if ((pTcon->ses->capabilities & CAP_UNIX) && | |
680 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & | |
681 | le64_to_cpu(pTcon->fsUnixInfo.Capability))) { | |
682 | rc = CIFSPOSIXDelFile(xid, pTcon, full_path, | |
683 | SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls, | |
737b758c | 684 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
2d785a50 SF |
685 | cFYI(1, ("posix del rc %d", rc)); |
686 | if ((rc == 0) || (rc == -ENOENT)) | |
687 | goto psx_del_no_retry; | |
688 | } | |
1da177e4 | 689 | |
2d785a50 SF |
690 | rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls, |
691 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
692 | psx_del_no_retry: | |
1da177e4 | 693 | if (!rc) { |
d0d2f2df | 694 | if (direntry->d_inode) |
9a53c3a7 | 695 | drop_nlink(direntry->d_inode); |
1da177e4 LT |
696 | } else if (rc == -ENOENT) { |
697 | d_drop(direntry); | |
698 | } else if (rc == -ETXTBSY) { | |
699 | int oplock = FALSE; | |
700 | __u16 netfid; | |
701 | ||
702 | rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE, | |
703 | CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE, | |
737b758c | 704 | &netfid, &oplock, NULL, cifs_sb->local_nls, |
fb8c4b14 | 705 | cifs_sb->mnt_cifs_flags & |
737b758c | 706 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
fb8c4b14 | 707 | if (rc == 0) { |
1da177e4 | 708 | CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL, |
fb8c4b14 SF |
709 | cifs_sb->local_nls, |
710 | cifs_sb->mnt_cifs_flags & | |
737b758c | 711 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1da177e4 | 712 | CIFSSMBClose(xid, pTcon, netfid); |
d0d2f2df | 713 | if (direntry->d_inode) |
9a53c3a7 | 714 | drop_nlink(direntry->d_inode); |
1da177e4 LT |
715 | } |
716 | } else if (rc == -EACCES) { | |
717 | /* try only if r/o attribute set in local lookup data? */ | |
a048d7a8 | 718 | pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL); |
1da177e4 | 719 | if (pinfo_buf) { |
1da177e4 LT |
720 | /* ATTRS set to normal clears r/o bit */ |
721 | pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL); | |
722 | if (!(pTcon->ses->flags & CIFS_SES_NT4)) | |
723 | rc = CIFSSMBSetTimes(xid, pTcon, full_path, | |
724 | pinfo_buf, | |
737b758c | 725 | cifs_sb->local_nls, |
fb8c4b14 | 726 | cifs_sb->mnt_cifs_flags & |
737b758c | 727 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1da177e4 LT |
728 | else |
729 | rc = -EOPNOTSUPP; | |
730 | ||
731 | if (rc == -EOPNOTSUPP) { | |
732 | int oplock = FALSE; | |
733 | __u16 netfid; | |
734 | /* rc = CIFSSMBSetAttrLegacy(xid, pTcon, | |
735 | full_path, | |
736 | (__u16)ATTR_NORMAL, | |
fb8c4b14 | 737 | cifs_sb->local_nls); |
1da177e4 LT |
738 | For some strange reason it seems that NT4 eats the |
739 | old setattr call without actually setting the | |
740 | attributes so on to the third attempted workaround | |
741 | */ | |
742 | ||
743 | /* BB could scan to see if we already have it open | |
744 | and pass in pid of opener to function */ | |
745 | rc = CIFSSMBOpen(xid, pTcon, full_path, | |
746 | FILE_OPEN, SYNCHRONIZE | | |
747 | FILE_WRITE_ATTRIBUTES, 0, | |
748 | &netfid, &oplock, NULL, | |
737b758c | 749 | cifs_sb->local_nls, |
fb8c4b14 | 750 | cifs_sb->mnt_cifs_flags & |
737b758c | 751 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
fb8c4b14 | 752 | if (rc == 0) { |
1da177e4 LT |
753 | rc = CIFSSMBSetFileTimes(xid, pTcon, |
754 | pinfo_buf, | |
755 | netfid); | |
756 | CIFSSMBClose(xid, pTcon, netfid); | |
757 | } | |
758 | } | |
759 | kfree(pinfo_buf); | |
760 | } | |
fb8c4b14 SF |
761 | if (rc == 0) { |
762 | rc = CIFSSMBDelFile(xid, pTcon, full_path, | |
763 | cifs_sb->local_nls, | |
764 | cifs_sb->mnt_cifs_flags & | |
737b758c | 765 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1da177e4 | 766 | if (!rc) { |
d0d2f2df | 767 | if (direntry->d_inode) |
9a53c3a7 | 768 | drop_nlink(direntry->d_inode); |
1da177e4 LT |
769 | } else if (rc == -ETXTBSY) { |
770 | int oplock = FALSE; | |
771 | __u16 netfid; | |
772 | ||
773 | rc = CIFSSMBOpen(xid, pTcon, full_path, | |
774 | FILE_OPEN, DELETE, | |
775 | CREATE_NOT_DIR | | |
776 | CREATE_DELETE_ON_CLOSE, | |
777 | &netfid, &oplock, NULL, | |
fb8c4b14 SF |
778 | cifs_sb->local_nls, |
779 | cifs_sb->mnt_cifs_flags & | |
737b758c | 780 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
fb8c4b14 | 781 | if (rc == 0) { |
1da177e4 LT |
782 | CIFSSMBRenameOpenFile(xid, pTcon, |
783 | netfid, NULL, | |
737b758c SF |
784 | cifs_sb->local_nls, |
785 | cifs_sb->mnt_cifs_flags & | |
786 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 | 787 | CIFSSMBClose(xid, pTcon, netfid); |
d0d2f2df | 788 | if (direntry->d_inode) |
9a53c3a7 | 789 | drop_nlink(direntry->d_inode); |
1da177e4 LT |
790 | } |
791 | /* BB if rc = -ETXTBUSY goto the rename logic BB */ | |
792 | } | |
793 | } | |
794 | } | |
d0d2f2df | 795 | if (direntry->d_inode) { |
b2aeb9d5 SF |
796 | cifsInode = CIFS_I(direntry->d_inode); |
797 | cifsInode->time = 0; /* will force revalidate to get info | |
798 | when needed */ | |
799 | direntry->d_inode->i_ctime = current_fs_time(inode->i_sb); | |
800 | } | |
4523cc30 | 801 | if (inode) { |
06bcfedd SF |
802 | inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb); |
803 | cifsInode = CIFS_I(inode); | |
804 | cifsInode->time = 0; /* force revalidate of dir as well */ | |
805 | } | |
1da177e4 LT |
806 | |
807 | kfree(full_path); | |
808 | FreeXid(xid); | |
809 | return rc; | |
810 | } | |
811 | ||
2dd29d31 | 812 | static void posix_fill_in_inode(struct inode *tmp_inode, |
0b442d2c | 813 | FILE_UNIX_BASIC_INFO *pData, int isNewInode) |
2dd29d31 | 814 | { |
75f12983 | 815 | struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); |
2dd29d31 SF |
816 | loff_t local_size; |
817 | struct timespec local_mtime; | |
818 | ||
2dd29d31 SF |
819 | cifsInfo->time = jiffies; |
820 | atomic_inc(&cifsInfo->inUse); | |
821 | ||
822 | /* save mtime and size */ | |
823 | local_mtime = tmp_inode->i_mtime; | |
824 | local_size = tmp_inode->i_size; | |
825 | ||
75f12983 | 826 | cifs_unix_info_to_inode(tmp_inode, pData, 1); |
7962670e | 827 | cifs_set_ops(tmp_inode, false); |
50c2f753 | 828 | |
75f12983 CH |
829 | if (!S_ISREG(tmp_inode->i_mode)) |
830 | return; | |
2dd29d31 | 831 | |
75f12983 CH |
832 | /* |
833 | * No sense invalidating pages for new inode | |
834 | * since we we have not started caching | |
835 | * readahead file data yet. | |
836 | */ | |
837 | if (isNewInode) | |
838 | return; | |
2dd29d31 | 839 | |
75f12983 CH |
840 | if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && |
841 | (local_size == tmp_inode->i_size)) { | |
842 | cFYI(1, ("inode exists but unchanged")); | |
2dd29d31 | 843 | } else { |
75f12983 CH |
844 | /* file may have changed on server */ |
845 | cFYI(1, ("invalidate inode, readdir detected change")); | |
846 | invalidate_remote_inode(tmp_inode); | |
fb8c4b14 | 847 | } |
2dd29d31 SF |
848 | } |
849 | ||
1da177e4 LT |
850 | int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode) |
851 | { | |
852 | int rc = 0; | |
853 | int xid; | |
854 | struct cifs_sb_info *cifs_sb; | |
855 | struct cifsTconInfo *pTcon; | |
856 | char *full_path = NULL; | |
857 | struct inode *newinode = NULL; | |
858 | ||
6473a559 | 859 | cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode)); |
1da177e4 LT |
860 | |
861 | xid = GetXid(); | |
862 | ||
863 | cifs_sb = CIFS_SB(inode->i_sb); | |
864 | pTcon = cifs_sb->tcon; | |
865 | ||
7f57356b | 866 | full_path = build_path_from_dentry(direntry); |
1da177e4 LT |
867 | if (full_path == NULL) { |
868 | FreeXid(xid); | |
869 | return -ENOMEM; | |
870 | } | |
50c2f753 | 871 | |
fb8c4b14 SF |
872 | if ((pTcon->ses->capabilities & CAP_UNIX) && |
873 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & | |
2dd29d31 SF |
874 | le64_to_cpu(pTcon->fsUnixInfo.Capability))) { |
875 | u32 oplock = 0; | |
f6d09982 | 876 | FILE_UNIX_BASIC_INFO *pInfo = |
2dd29d31 | 877 | kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL); |
fb8c4b14 | 878 | if (pInfo == NULL) { |
2dd29d31 SF |
879 | rc = -ENOMEM; |
880 | goto mkdir_out; | |
881 | } | |
50c2f753 | 882 | |
a8cd925f | 883 | mode &= ~current->fs->umask; |
2dd29d31 SF |
884 | rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT, |
885 | mode, NULL /* netfid */, pInfo, &oplock, | |
fb8c4b14 SF |
886 | full_path, cifs_sb->local_nls, |
887 | cifs_sb->mnt_cifs_flags & | |
2dd29d31 | 888 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
c45d707f SF |
889 | if (rc == -EOPNOTSUPP) { |
890 | kfree(pInfo); | |
891 | goto mkdir_retry_old; | |
892 | } else if (rc) { | |
2dd29d31 SF |
893 | cFYI(1, ("posix mkdir returned 0x%x", rc)); |
894 | d_drop(direntry); | |
895 | } else { | |
8f2376ad CG |
896 | if (pInfo->Type == cpu_to_le32(-1)) { |
897 | /* no return info, go query for it */ | |
5a07cdf8 | 898 | kfree(pInfo); |
fb8c4b14 | 899 | goto mkdir_get_info; |
5a07cdf8 | 900 | } |
fb8c4b14 SF |
901 | /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need |
902 | to set uid/gid */ | |
2dd29d31 SF |
903 | inc_nlink(inode); |
904 | if (pTcon->nocase) | |
905 | direntry->d_op = &cifs_ci_dentry_ops; | |
906 | else | |
907 | direntry->d_op = &cifs_dentry_ops; | |
cbac3cba SF |
908 | |
909 | newinode = new_inode(inode->i_sb); | |
5a07cdf8 SF |
910 | if (newinode == NULL) { |
911 | kfree(pInfo); | |
cbac3cba | 912 | goto mkdir_get_info; |
5a07cdf8 | 913 | } |
cbac3cba SF |
914 | /* Is an i_ino of zero legal? */ |
915 | /* Are there sanity checks we can use to ensure that | |
916 | the server is really filling in that field? */ | |
917 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { | |
918 | newinode->i_ino = | |
919 | (unsigned long)pInfo->UniqueId; | |
920 | } /* note ino incremented to unique num in new_inode */ | |
fb8c4b14 | 921 | if (inode->i_sb->s_flags & MS_NOATIME) |
cbac3cba SF |
922 | newinode->i_flags |= S_NOATIME | S_NOCMTIME; |
923 | newinode->i_nlink = 2; | |
924 | ||
925 | insert_inode_hash(newinode); | |
2dd29d31 | 926 | d_instantiate(direntry, newinode); |
cbac3cba SF |
927 | |
928 | /* we already checked in POSIXCreate whether | |
929 | frame was long enough */ | |
930 | posix_fill_in_inode(direntry->d_inode, | |
0b442d2c | 931 | pInfo, 1 /* NewInode */); |
cbac3cba | 932 | #ifdef CONFIG_CIFS_DEBUG2 |
fb8c4b14 | 933 | cFYI(1, ("instantiated dentry %p %s to inode %p", |
cbac3cba SF |
934 | direntry, direntry->d_name.name, newinode)); |
935 | ||
fb8c4b14 SF |
936 | if (newinode->i_nlink != 2) |
937 | cFYI(1, ("unexpected number of links %d", | |
cbac3cba SF |
938 | newinode->i_nlink)); |
939 | #endif | |
2dd29d31 SF |
940 | } |
941 | kfree(pInfo); | |
942 | goto mkdir_out; | |
fb8c4b14 | 943 | } |
c45d707f | 944 | mkdir_retry_old: |
1da177e4 | 945 | /* BB add setting the equivalent of mode via CreateX w/ACLs */ |
737b758c SF |
946 | rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls, |
947 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 | 948 | if (rc) { |
26a21b98 | 949 | cFYI(1, ("cifs_mkdir returned 0x%x", rc)); |
1da177e4 LT |
950 | d_drop(direntry); |
951 | } else { | |
fb8c4b14 | 952 | mkdir_get_info: |
d8c76e6f | 953 | inc_nlink(inode); |
c18c842b | 954 | if (pTcon->unix_ext) |
1da177e4 | 955 | rc = cifs_get_inode_info_unix(&newinode, full_path, |
fb8c4b14 | 956 | inode->i_sb, xid); |
1da177e4 LT |
957 | else |
958 | rc = cifs_get_inode_info(&newinode, full_path, NULL, | |
8b1327f6 | 959 | inode->i_sb, xid, NULL); |
1da177e4 | 960 | |
b92327fe SF |
961 | if (pTcon->nocase) |
962 | direntry->d_op = &cifs_ci_dentry_ops; | |
963 | else | |
964 | direntry->d_op = &cifs_dentry_ops; | |
1da177e4 | 965 | d_instantiate(direntry, newinode); |
2dd29d31 | 966 | /* setting nlink not necessary except in cases where we |
fb8c4b14 | 967 | * failed to get it from the server or was set bogus */ |
2dd29d31 | 968 | if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2)) |
fb8c4b14 | 969 | direntry->d_inode->i_nlink = 2; |
c18c842b | 970 | if (pTcon->unix_ext) { |
3ce53fc4 | 971 | mode &= ~current->fs->umask; |
d0d2f2df | 972 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
1da177e4 LT |
973 | CIFSSMBUnixSetPerms(xid, pTcon, full_path, |
974 | mode, | |
83451879 SF |
975 | (__u64)current->fsuid, |
976 | (__u64)current->fsgid, | |
1da177e4 | 977 | 0 /* dev_t */, |
737b758c SF |
978 | cifs_sb->local_nls, |
979 | cifs_sb->mnt_cifs_flags & | |
980 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
981 | } else { |
982 | CIFSSMBUnixSetPerms(xid, pTcon, full_path, | |
983 | mode, (__u64)-1, | |
984 | (__u64)-1, 0 /* dev_t */, | |
737b758c | 985 | cifs_sb->local_nls, |
fb8c4b14 | 986 | cifs_sb->mnt_cifs_flags & |
737b758c | 987 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1da177e4 | 988 | } |
3ce53fc4 | 989 | } else { |
1da177e4 LT |
990 | /* BB to be implemented via Windows secrty descriptors |
991 | eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode, | |
992 | -1, -1, local_nls); */ | |
fb8c4b14 | 993 | if (direntry->d_inode) { |
6473a559 | 994 | direntry->d_inode->i_mode = mode; |
25741b3e | 995 | direntry->d_inode->i_mode |= S_IFDIR; |
fb8c4b14 | 996 | if (cifs_sb->mnt_cifs_flags & |
6473a559 | 997 | CIFS_MOUNT_SET_UID) { |
fb8c4b14 | 998 | direntry->d_inode->i_uid = |
6473a559 | 999 | current->fsuid; |
fb8c4b14 | 1000 | direntry->d_inode->i_gid = |
6473a559 SF |
1001 | current->fsgid; |
1002 | } | |
1003 | } | |
2a138ebb | 1004 | } |
1da177e4 | 1005 | } |
fb8c4b14 | 1006 | mkdir_out: |
1da177e4 LT |
1007 | kfree(full_path); |
1008 | FreeXid(xid); | |
1009 | return rc; | |
1010 | } | |
1011 | ||
1012 | int cifs_rmdir(struct inode *inode, struct dentry *direntry) | |
1013 | { | |
1014 | int rc = 0; | |
1015 | int xid; | |
1016 | struct cifs_sb_info *cifs_sb; | |
1017 | struct cifsTconInfo *pTcon; | |
1018 | char *full_path = NULL; | |
1019 | struct cifsInodeInfo *cifsInode; | |
1020 | ||
26a21b98 | 1021 | cFYI(1, ("cifs_rmdir, inode = 0x%p", inode)); |
1da177e4 LT |
1022 | |
1023 | xid = GetXid(); | |
1024 | ||
1025 | cifs_sb = CIFS_SB(inode->i_sb); | |
1026 | pTcon = cifs_sb->tcon; | |
1027 | ||
7f57356b | 1028 | full_path = build_path_from_dentry(direntry); |
1da177e4 LT |
1029 | if (full_path == NULL) { |
1030 | FreeXid(xid); | |
1031 | return -ENOMEM; | |
1032 | } | |
1033 | ||
737b758c SF |
1034 | rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls, |
1035 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
1036 | |
1037 | if (!rc) { | |
9a53c3a7 | 1038 | drop_nlink(inode); |
3677db10 | 1039 | spin_lock(&direntry->d_inode->i_lock); |
fb8c4b14 | 1040 | i_size_write(direntry->d_inode, 0); |
ce71ec36 | 1041 | clear_nlink(direntry->d_inode); |
3677db10 | 1042 | spin_unlock(&direntry->d_inode->i_lock); |
1da177e4 LT |
1043 | } |
1044 | ||
1045 | cifsInode = CIFS_I(direntry->d_inode); | |
1046 | cifsInode->time = 0; /* force revalidate to go get info when | |
1047 | needed */ | |
1048 | direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime = | |
1049 | current_fs_time(inode->i_sb); | |
1050 | ||
1051 | kfree(full_path); | |
1052 | FreeXid(xid); | |
1053 | return rc; | |
1054 | } | |
1055 | ||
1056 | int cifs_rename(struct inode *source_inode, struct dentry *source_direntry, | |
1057 | struct inode *target_inode, struct dentry *target_direntry) | |
1058 | { | |
1059 | char *fromName; | |
1060 | char *toName; | |
1061 | struct cifs_sb_info *cifs_sb_source; | |
1062 | struct cifs_sb_info *cifs_sb_target; | |
1063 | struct cifsTconInfo *pTcon; | |
1064 | int xid; | |
1065 | int rc = 0; | |
1066 | ||
1067 | xid = GetXid(); | |
1068 | ||
1069 | cifs_sb_target = CIFS_SB(target_inode->i_sb); | |
1070 | cifs_sb_source = CIFS_SB(source_inode->i_sb); | |
1071 | pTcon = cifs_sb_source->tcon; | |
1072 | ||
1073 | if (pTcon != cifs_sb_target->tcon) { | |
1074 | FreeXid(xid); | |
1075 | return -EXDEV; /* BB actually could be allowed if same server, | |
1076 | but different share. | |
1077 | Might eventually add support for this */ | |
1078 | } | |
1079 | ||
1080 | /* we already have the rename sem so we do not need to grab it again | |
1081 | here to protect the path integrity */ | |
7f57356b SF |
1082 | fromName = build_path_from_dentry(source_direntry); |
1083 | toName = build_path_from_dentry(target_direntry); | |
1da177e4 LT |
1084 | if ((fromName == NULL) || (toName == NULL)) { |
1085 | rc = -ENOMEM; | |
1086 | goto cifs_rename_exit; | |
1087 | } | |
1088 | ||
1089 | rc = CIFSSMBRename(xid, pTcon, fromName, toName, | |
737b758c SF |
1090 | cifs_sb_source->local_nls, |
1091 | cifs_sb_source->mnt_cifs_flags & | |
1092 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
1093 | if (rc == -EEXIST) { |
1094 | /* check if they are the same file because rename of hardlinked | |
1095 | files is a noop */ | |
1096 | FILE_UNIX_BASIC_INFO *info_buf_source; | |
1097 | FILE_UNIX_BASIC_INFO *info_buf_target; | |
1098 | ||
1099 | info_buf_source = | |
1100 | kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL); | |
1101 | if (info_buf_source != NULL) { | |
1102 | info_buf_target = info_buf_source + 1; | |
c18c842b | 1103 | if (pTcon->unix_ext) |
8e87d4dc | 1104 | rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName, |
fb8c4b14 | 1105 | info_buf_source, |
8e87d4dc SF |
1106 | cifs_sb_source->local_nls, |
1107 | cifs_sb_source->mnt_cifs_flags & | |
1108 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1109 | /* else rc is still EEXIST so will fall through to | |
1110 | unlink the target and retry rename */ | |
1da177e4 LT |
1111 | if (rc == 0) { |
1112 | rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName, | |
1113 | info_buf_target, | |
737b758c SF |
1114 | cifs_sb_target->local_nls, |
1115 | /* remap based on source sb */ | |
1116 | cifs_sb_source->mnt_cifs_flags & | |
1117 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
1118 | } |
1119 | if ((rc == 0) && | |
1120 | (info_buf_source->UniqueId == | |
1121 | info_buf_target->UniqueId)) { | |
1122 | /* do not rename since the files are hardlinked which | |
1123 | is a noop */ | |
1124 | } else { | |
1125 | /* we either can not tell the files are hardlinked | |
1126 | (as with Windows servers) or files are not | |
1127 | hardlinked so delete the target manually before | |
1128 | renaming to follow POSIX rather than Windows | |
1129 | semantics */ | |
1130 | cifs_unlink(target_inode, target_direntry); | |
1131 | rc = CIFSSMBRename(xid, pTcon, fromName, | |
1132 | toName, | |
737b758c SF |
1133 | cifs_sb_source->local_nls, |
1134 | cifs_sb_source->mnt_cifs_flags | |
1135 | & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
1136 | } |
1137 | kfree(info_buf_source); | |
1138 | } /* if we can not get memory just leave rc as EEXIST */ | |
1139 | } | |
1140 | ||
ad7a2926 | 1141 | if (rc) |
1da177e4 | 1142 | cFYI(1, ("rename rc %d", rc)); |
1da177e4 LT |
1143 | |
1144 | if ((rc == -EIO) || (rc == -EEXIST)) { | |
1145 | int oplock = FALSE; | |
1146 | __u16 netfid; | |
1147 | ||
1148 | /* BB FIXME Is Generic Read correct for rename? */ | |
1149 | /* if renaming directory - we should not say CREATE_NOT_DIR, | |
1150 | need to test renaming open directory, also GENERIC_READ | |
1151 | might not right be right access to request */ | |
1152 | rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ, | |
1153 | CREATE_NOT_DIR, &netfid, &oplock, NULL, | |
fb8c4b14 SF |
1154 | cifs_sb_source->local_nls, |
1155 | cifs_sb_source->mnt_cifs_flags & | |
737b758c | 1156 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
fb8c4b14 | 1157 | if (rc == 0) { |
8e87d4dc | 1158 | rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName, |
fb8c4b14 | 1159 | cifs_sb_source->local_nls, |
737b758c SF |
1160 | cifs_sb_source->mnt_cifs_flags & |
1161 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
1162 | CIFSSMBClose(xid, pTcon, netfid); |
1163 | } | |
1164 | } | |
1165 | ||
1166 | cifs_rename_exit: | |
1167 | kfree(fromName); | |
1168 | kfree(toName); | |
1169 | FreeXid(xid); | |
1170 | return rc; | |
1171 | } | |
1172 | ||
1173 | int cifs_revalidate(struct dentry *direntry) | |
1174 | { | |
1175 | int xid; | |
cea21805 | 1176 | int rc = 0, wbrc = 0; |
1da177e4 LT |
1177 | char *full_path; |
1178 | struct cifs_sb_info *cifs_sb; | |
1179 | struct cifsInodeInfo *cifsInode; | |
1180 | loff_t local_size; | |
1181 | struct timespec local_mtime; | |
1182 | int invalidate_inode = FALSE; | |
1183 | ||
1184 | if (direntry->d_inode == NULL) | |
1185 | return -ENOENT; | |
1186 | ||
1187 | cifsInode = CIFS_I(direntry->d_inode); | |
1188 | ||
1189 | if (cifsInode == NULL) | |
1190 | return -ENOENT; | |
1191 | ||
1192 | /* no sense revalidating inode info on file that no one can write */ | |
1193 | if (CIFS_I(direntry->d_inode)->clientCanCacheRead) | |
1194 | return rc; | |
1195 | ||
1196 | xid = GetXid(); | |
1197 | ||
1198 | cifs_sb = CIFS_SB(direntry->d_sb); | |
1199 | ||
1200 | /* can not safely grab the rename sem here if rename calls revalidate | |
1201 | since that would deadlock */ | |
7f57356b | 1202 | full_path = build_path_from_dentry(direntry); |
1da177e4 LT |
1203 | if (full_path == NULL) { |
1204 | FreeXid(xid); | |
1205 | return -ENOMEM; | |
1206 | } | |
1207 | cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld " | |
1208 | "jiffies %ld", full_path, direntry->d_inode, | |
1209 | direntry->d_inode->i_count.counter, direntry, | |
1210 | direntry->d_time, jiffies)); | |
1211 | ||
1212 | if (cifsInode->time == 0) { | |
1213 | /* was set to zero previously to force revalidate */ | |
1214 | } else if (time_before(jiffies, cifsInode->time + HZ) && | |
1215 | lookupCacheEnabled) { | |
1216 | if ((S_ISREG(direntry->d_inode->i_mode) == 0) || | |
1217 | (direntry->d_inode->i_nlink == 1)) { | |
1218 | kfree(full_path); | |
1219 | FreeXid(xid); | |
1220 | return rc; | |
1221 | } else { | |
1222 | cFYI(1, ("Have to revalidate file due to hardlinks")); | |
1223 | } | |
1224 | } | |
1225 | ||
1226 | /* save mtime and size */ | |
1227 | local_mtime = direntry->d_inode->i_mtime; | |
1228 | local_size = direntry->d_inode->i_size; | |
1229 | ||
c18c842b | 1230 | if (cifs_sb->tcon->unix_ext) { |
1da177e4 | 1231 | rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path, |
fb8c4b14 | 1232 | direntry->d_sb, xid); |
1da177e4 LT |
1233 | if (rc) { |
1234 | cFYI(1, ("error on getting revalidate info %d", rc)); | |
1235 | /* if (rc != -ENOENT) | |
1236 | rc = 0; */ /* BB should we cache info on | |
1237 | certain errors? */ | |
1238 | } | |
1239 | } else { | |
1240 | rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL, | |
8b1327f6 | 1241 | direntry->d_sb, xid, NULL); |
1da177e4 LT |
1242 | if (rc) { |
1243 | cFYI(1, ("error on getting revalidate info %d", rc)); | |
1244 | /* if (rc != -ENOENT) | |
1245 | rc = 0; */ /* BB should we cache info on | |
1246 | certain errors? */ | |
1247 | } | |
1248 | } | |
1249 | /* should we remap certain errors, access denied?, to zero */ | |
1250 | ||
1251 | /* if not oplocked, we invalidate inode pages if mtime or file size | |
1252 | had changed on server */ | |
1253 | ||
fb8c4b14 | 1254 | if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) && |
1da177e4 LT |
1255 | (local_size == direntry->d_inode->i_size)) { |
1256 | cFYI(1, ("cifs_revalidate - inode unchanged")); | |
1257 | } else { | |
1258 | /* file may have changed on server */ | |
1259 | if (cifsInode->clientCanCacheRead) { | |
1260 | /* no need to invalidate inode pages since we were the | |
1261 | only ones who could have modified the file and the | |
1262 | server copy is staler than ours */ | |
1263 | } else { | |
1264 | invalidate_inode = TRUE; | |
1265 | } | |
1266 | } | |
1267 | ||
1268 | /* can not grab this sem since kernel filesys locking documentation | |
1b1dcc1b JS |
1269 | indicates i_mutex may be taken by the kernel on lookup and rename |
1270 | which could deadlock if we grab the i_mutex here as well */ | |
1271 | /* mutex_lock(&direntry->d_inode->i_mutex);*/ | |
1da177e4 LT |
1272 | /* need to write out dirty pages here */ |
1273 | if (direntry->d_inode->i_mapping) { | |
1274 | /* do we need to lock inode until after invalidate completes | |
1275 | below? */ | |
cea21805 JL |
1276 | wbrc = filemap_fdatawrite(direntry->d_inode->i_mapping); |
1277 | if (wbrc) | |
1278 | CIFS_I(direntry->d_inode)->write_behind_rc = wbrc; | |
1da177e4 LT |
1279 | } |
1280 | if (invalidate_inode) { | |
3abb9272 SF |
1281 | /* shrink_dcache not necessary now that cifs dentry ops |
1282 | are exported for negative dentries */ | |
fb8c4b14 | 1283 | /* if (S_ISDIR(direntry->d_inode->i_mode)) |
3abb9272 SF |
1284 | shrink_dcache_parent(direntry); */ |
1285 | if (S_ISREG(direntry->d_inode->i_mode)) { | |
1286 | if (direntry->d_inode->i_mapping) | |
cea21805 JL |
1287 | wbrc = filemap_fdatawait(direntry->d_inode->i_mapping); |
1288 | if (wbrc) | |
1289 | CIFS_I(direntry->d_inode)->write_behind_rc = wbrc; | |
3abb9272 SF |
1290 | /* may eventually have to do this for open files too */ |
1291 | if (list_empty(&(cifsInode->openFileList))) { | |
1292 | /* changed on server - flush read ahead pages */ | |
1293 | cFYI(1, ("Invalidating read ahead data on " | |
1294 | "closed file")); | |
1295 | invalidate_remote_inode(direntry->d_inode); | |
1296 | } | |
1da177e4 LT |
1297 | } |
1298 | } | |
1b1dcc1b | 1299 | /* mutex_unlock(&direntry->d_inode->i_mutex); */ |
50c2f753 | 1300 | |
1da177e4 LT |
1301 | kfree(full_path); |
1302 | FreeXid(xid); | |
1303 | return rc; | |
1304 | } | |
1305 | ||
1306 | int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
1307 | struct kstat *stat) | |
1308 | { | |
1309 | int err = cifs_revalidate(dentry); | |
5fe14c85 | 1310 | if (!err) { |
1da177e4 | 1311 | generic_fillattr(dentry->d_inode, stat); |
5fe14c85 SF |
1312 | stat->blksize = CIFS_MAX_MSGSIZE; |
1313 | } | |
1da177e4 LT |
1314 | return err; |
1315 | } | |
1316 | ||
1317 | static int cifs_truncate_page(struct address_space *mapping, loff_t from) | |
1318 | { | |
1319 | pgoff_t index = from >> PAGE_CACHE_SHIFT; | |
1320 | unsigned offset = from & (PAGE_CACHE_SIZE - 1); | |
1321 | struct page *page; | |
1da177e4 LT |
1322 | int rc = 0; |
1323 | ||
1324 | page = grab_cache_page(mapping, index); | |
1325 | if (!page) | |
1326 | return -ENOMEM; | |
1327 | ||
eebd2aa3 | 1328 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); |
1da177e4 LT |
1329 | unlock_page(page); |
1330 | page_cache_release(page); | |
1331 | return rc; | |
1332 | } | |
1333 | ||
fb8c4b14 | 1334 | static int cifs_vmtruncate(struct inode *inode, loff_t offset) |
3677db10 SF |
1335 | { |
1336 | struct address_space *mapping = inode->i_mapping; | |
1337 | unsigned long limit; | |
1338 | ||
ba6a46a0 | 1339 | spin_lock(&inode->i_lock); |
3677db10 SF |
1340 | if (inode->i_size < offset) |
1341 | goto do_expand; | |
1342 | /* | |
1343 | * truncation of in-use swapfiles is disallowed - it would cause | |
1344 | * subsequent swapout to scribble on the now-freed blocks. | |
1345 | */ | |
ba6a46a0 SF |
1346 | if (IS_SWAPFILE(inode)) { |
1347 | spin_unlock(&inode->i_lock); | |
3677db10 | 1348 | goto out_busy; |
ba6a46a0 | 1349 | } |
3677db10 SF |
1350 | i_size_write(inode, offset); |
1351 | spin_unlock(&inode->i_lock); | |
8064ab4d SF |
1352 | /* |
1353 | * unmap_mapping_range is called twice, first simply for efficiency | |
1354 | * so that truncate_inode_pages does fewer single-page unmaps. However | |
1355 | * after this first call, and before truncate_inode_pages finishes, | |
1356 | * it is possible for private pages to be COWed, which remain after | |
1357 | * truncate_inode_pages finishes, hence the second unmap_mapping_range | |
1358 | * call must be made for correctness. | |
1359 | */ | |
3677db10 SF |
1360 | unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1); |
1361 | truncate_inode_pages(mapping, offset); | |
8064ab4d | 1362 | unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1); |
3677db10 SF |
1363 | goto out_truncate; |
1364 | ||
1365 | do_expand: | |
1366 | limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur; | |
ba6a46a0 SF |
1367 | if (limit != RLIM_INFINITY && offset > limit) { |
1368 | spin_unlock(&inode->i_lock); | |
3677db10 | 1369 | goto out_sig; |
ba6a46a0 SF |
1370 | } |
1371 | if (offset > inode->i_sb->s_maxbytes) { | |
1372 | spin_unlock(&inode->i_lock); | |
3677db10 | 1373 | goto out_big; |
ba6a46a0 | 1374 | } |
3677db10 | 1375 | i_size_write(inode, offset); |
ba6a46a0 | 1376 | spin_unlock(&inode->i_lock); |
3677db10 SF |
1377 | out_truncate: |
1378 | if (inode->i_op && inode->i_op->truncate) | |
1379 | inode->i_op->truncate(inode); | |
1380 | return 0; | |
1381 | out_sig: | |
1382 | send_sig(SIGXFSZ, current, 0); | |
1383 | out_big: | |
1384 | return -EFBIG; | |
1385 | out_busy: | |
1386 | return -ETXTBSY; | |
1387 | } | |
1388 | ||
1da177e4 LT |
1389 | int cifs_setattr(struct dentry *direntry, struct iattr *attrs) |
1390 | { | |
1391 | int xid; | |
1392 | struct cifs_sb_info *cifs_sb; | |
1393 | struct cifsTconInfo *pTcon; | |
1394 | char *full_path = NULL; | |
1395 | int rc = -EACCES; | |
1da177e4 LT |
1396 | struct cifsFileInfo *open_file = NULL; |
1397 | FILE_BASIC_INFO time_buf; | |
1398 | int set_time = FALSE; | |
066fcb06 | 1399 | int set_dosattr = FALSE; |
1da177e4 LT |
1400 | __u64 mode = 0xFFFFFFFFFFFFFFFFULL; |
1401 | __u64 uid = 0xFFFFFFFFFFFFFFFFULL; | |
1402 | __u64 gid = 0xFFFFFFFFFFFFFFFFULL; | |
1403 | struct cifsInodeInfo *cifsInode; | |
1da177e4 LT |
1404 | |
1405 | xid = GetXid(); | |
1406 | ||
3979877e | 1407 | cFYI(1, ("setattr on file %s attrs->iavalid 0x%x", |
1da177e4 | 1408 | direntry->d_name.name, attrs->ia_valid)); |
6473a559 | 1409 | |
1da177e4 LT |
1410 | cifs_sb = CIFS_SB(direntry->d_inode->i_sb); |
1411 | pTcon = cifs_sb->tcon; | |
1412 | ||
2a138ebb | 1413 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) { |
6473a559 SF |
1414 | /* check if we have permission to change attrs */ |
1415 | rc = inode_change_ok(direntry->d_inode, attrs); | |
fb8c4b14 | 1416 | if (rc < 0) { |
6473a559 SF |
1417 | FreeXid(xid); |
1418 | return rc; | |
1419 | } else | |
1420 | rc = 0; | |
1421 | } | |
50c2f753 | 1422 | |
7f57356b | 1423 | full_path = build_path_from_dentry(direntry); |
1da177e4 LT |
1424 | if (full_path == NULL) { |
1425 | FreeXid(xid); | |
1426 | return -ENOMEM; | |
1427 | } | |
1428 | cifsInode = CIFS_I(direntry->d_inode); | |
1429 | ||
50531444 | 1430 | if ((attrs->ia_valid & ATTR_MTIME) || (attrs->ia_valid & ATTR_SIZE)) { |
cea21805 | 1431 | /* |
50531444 SF |
1432 | Flush data before changing file size or changing the last |
1433 | write time of the file on the server. If the | |
cea21805 JL |
1434 | flush returns error, store it to report later and continue. |
1435 | BB: This should be smarter. Why bother flushing pages that | |
1436 | will be truncated anyway? Also, should we error out here if | |
1437 | the flush returns error? | |
1438 | */ | |
1439 | rc = filemap_write_and_wait(direntry->d_inode->i_mapping); | |
1440 | if (rc != 0) { | |
1441 | CIFS_I(direntry->d_inode)->write_behind_rc = rc; | |
1442 | rc = 0; | |
1443 | } | |
50531444 | 1444 | } |
cea21805 | 1445 | |
50531444 | 1446 | if (attrs->ia_valid & ATTR_SIZE) { |
1da177e4 LT |
1447 | /* To avoid spurious oplock breaks from server, in the case of |
1448 | inodes that we already have open, avoid doing path based | |
1449 | setting of file size if we can do it by handle. | |
1450 | This keeps our caching token (oplock) and avoids timeouts | |
1451 | when the local oplock break takes longer to flush | |
1452 | writebehind data than the SMB timeout for the SetPathInfo | |
1453 | request would allow */ | |
3979877e | 1454 | |
6148a742 SF |
1455 | open_file = find_writable_file(cifsInode); |
1456 | if (open_file) { | |
1457 | __u16 nfid = open_file->netfid; | |
1458 | __u32 npid = open_file->pid; | |
1459 | rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size, | |
1460 | nfid, npid, FALSE); | |
23e7dd7d | 1461 | atomic_dec(&open_file->wrtPending); |
fb8c4b14 SF |
1462 | cFYI(1, ("SetFSize for attrs rc = %d", rc)); |
1463 | if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { | |
77159b4d | 1464 | unsigned int bytes_written; |
6148a742 SF |
1465 | rc = CIFSSMBWrite(xid, pTcon, |
1466 | nfid, 0, attrs->ia_size, | |
1467 | &bytes_written, NULL, NULL, | |
1468 | 1 /* 45 seconds */); | |
fb8c4b14 | 1469 | cFYI(1, ("Wrt seteof rc %d", rc)); |
1da177e4 | 1470 | } |
fb8c4b14 | 1471 | } else |
6473a559 SF |
1472 | rc = -EINVAL; |
1473 | ||
1da177e4 LT |
1474 | if (rc != 0) { |
1475 | /* Set file size by pathname rather than by handle | |
1476 | either because no valid, writeable file handle for | |
1477 | it was found or because there was an error setting | |
1478 | it by handle */ | |
1479 | rc = CIFSSMBSetEOF(xid, pTcon, full_path, | |
1480 | attrs->ia_size, FALSE, | |
fb8c4b14 | 1481 | cifs_sb->local_nls, |
737b758c SF |
1482 | cifs_sb->mnt_cifs_flags & |
1483 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
e30dcf3a | 1484 | cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc)); |
fb8c4b14 | 1485 | if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { |
e30dcf3a SF |
1486 | __u16 netfid; |
1487 | int oplock = FALSE; | |
1488 | ||
1489 | rc = SMBLegacyOpen(xid, pTcon, full_path, | |
1490 | FILE_OPEN, | |
1491 | SYNCHRONIZE | FILE_WRITE_ATTRIBUTES, | |
1492 | CREATE_NOT_DIR, &netfid, &oplock, | |
1493 | NULL, cifs_sb->local_nls, | |
1494 | cifs_sb->mnt_cifs_flags & | |
1495 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
fb8c4b14 | 1496 | if (rc == 0) { |
77159b4d | 1497 | unsigned int bytes_written; |
e30dcf3a SF |
1498 | rc = CIFSSMBWrite(xid, pTcon, |
1499 | netfid, 0, | |
1500 | attrs->ia_size, | |
1501 | &bytes_written, NULL, | |
1502 | NULL, 1 /* 45 sec */); | |
fb8c4b14 | 1503 | cFYI(1, ("wrt seteof rc %d", rc)); |
e30dcf3a SF |
1504 | CIFSSMBClose(xid, pTcon, netfid); |
1505 | } | |
1506 | ||
1507 | } | |
1da177e4 LT |
1508 | } |
1509 | ||
1510 | /* Server is ok setting allocation size implicitly - no need | |
1511 | to call: | |
1512 | CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE, | |
1513 | cifs_sb->local_nls); | |
1514 | */ | |
1515 | ||
1516 | if (rc == 0) { | |
3677db10 | 1517 | rc = cifs_vmtruncate(direntry->d_inode, attrs->ia_size); |
1da177e4 LT |
1518 | cifs_truncate_page(direntry->d_inode->i_mapping, |
1519 | direntry->d_inode->i_size); | |
fb8c4b14 | 1520 | } else |
e30dcf3a | 1521 | goto cifs_setattr_exit; |
1da177e4 LT |
1522 | } |
1523 | if (attrs->ia_valid & ATTR_UID) { | |
e30dcf3a | 1524 | cFYI(1, ("UID changed to %d", attrs->ia_uid)); |
1da177e4 | 1525 | uid = attrs->ia_uid; |
1da177e4 LT |
1526 | } |
1527 | if (attrs->ia_valid & ATTR_GID) { | |
e30dcf3a | 1528 | cFYI(1, ("GID changed to %d", attrs->ia_gid)); |
1da177e4 | 1529 | gid = attrs->ia_gid; |
1da177e4 LT |
1530 | } |
1531 | ||
1532 | time_buf.Attributes = 0; | |
d32c4f26 JL |
1533 | |
1534 | /* skip mode change if it's just for clearing setuid/setgid */ | |
1535 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) | |
1536 | attrs->ia_valid &= ~ATTR_MODE; | |
1537 | ||
1da177e4 | 1538 | if (attrs->ia_valid & ATTR_MODE) { |
e30dcf3a | 1539 | cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode)); |
1da177e4 | 1540 | mode = attrs->ia_mode; |
1da177e4 LT |
1541 | } |
1542 | ||
c18c842b | 1543 | if ((pTcon->unix_ext) |
1da177e4 LT |
1544 | && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID))) |
1545 | rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid, | |
737b758c | 1546 | 0 /* dev_t */, cifs_sb->local_nls, |
fb8c4b14 | 1547 | cifs_sb->mnt_cifs_flags & |
737b758c | 1548 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1da177e4 | 1549 | else if (attrs->ia_valid & ATTR_MODE) { |
cdbce9c8 | 1550 | rc = 0; |
97837582 SF |
1551 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
1552 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) | |
1553 | rc = mode_to_acl(direntry->d_inode, full_path, mode); | |
f6d09982 | 1554 | else if ((mode & S_IWUGO) == 0) { |
97837582 | 1555 | #else |
f6d09982 | 1556 | if ((mode & S_IWUGO) == 0) { |
97837582 | 1557 | #endif |
f6d09982 | 1558 | /* not writeable */ |
066fcb06 SF |
1559 | if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0) { |
1560 | set_dosattr = TRUE; | |
1da177e4 LT |
1561 | time_buf.Attributes = |
1562 | cpu_to_le32(cifsInode->cifsAttrs | | |
1563 | ATTR_READONLY); | |
066fcb06 | 1564 | } |
5268df2e SF |
1565 | } else if (cifsInode->cifsAttrs & ATTR_READONLY) { |
1566 | /* If file is readonly on server, we would | |
1567 | not be able to write to it - so if any write | |
1568 | bit is enabled for user or group or other we | |
1569 | need to at least try to remove r/o dos attr */ | |
1570 | set_dosattr = TRUE; | |
1571 | time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs & | |
1572 | (~ATTR_READONLY)); | |
1573 | /* Windows ignores set to zero */ | |
fb8c4b14 | 1574 | if (time_buf.Attributes == 0) |
5268df2e | 1575 | time_buf.Attributes |= cpu_to_le32(ATTR_NORMAL); |
1da177e4 | 1576 | } |
97837582 SF |
1577 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
1578 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) | |
1579 | mode_to_acl(direntry->d_inode, full_path, mode); | |
1580 | #endif | |
1da177e4 LT |
1581 | } |
1582 | ||
1583 | if (attrs->ia_valid & ATTR_ATIME) { | |
1584 | set_time = TRUE; | |
1585 | time_buf.LastAccessTime = | |
1586 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime)); | |
1587 | } else | |
1588 | time_buf.LastAccessTime = 0; | |
1589 | ||
1590 | if (attrs->ia_valid & ATTR_MTIME) { | |
1591 | set_time = TRUE; | |
1592 | time_buf.LastWriteTime = | |
1593 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime)); | |
1594 | } else | |
1595 | time_buf.LastWriteTime = 0; | |
e30dcf3a SF |
1596 | /* Do not set ctime explicitly unless other time |
1597 | stamps are changed explicitly (i.e. by utime() | |
1598 | since we would then have a mix of client and | |
1599 | server times */ | |
50c2f753 | 1600 | |
e30dcf3a | 1601 | if (set_time && (attrs->ia_valid & ATTR_CTIME)) { |
1da177e4 | 1602 | set_time = TRUE; |
e30dcf3a SF |
1603 | /* Although Samba throws this field away |
1604 | it may be useful to Windows - but we do | |
1605 | not want to set ctime unless some other | |
1606 | timestamp is changing */ | |
26a21b98 | 1607 | cFYI(1, ("CIFS - CTIME changed")); |
1da177e4 LT |
1608 | time_buf.ChangeTime = |
1609 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime)); | |
1610 | } else | |
1611 | time_buf.ChangeTime = 0; | |
1612 | ||
066fcb06 | 1613 | if (set_time || set_dosattr) { |
1da177e4 LT |
1614 | time_buf.CreationTime = 0; /* do not change */ |
1615 | /* In the future we should experiment - try setting timestamps | |
1616 | via Handle (SetFileInfo) instead of by path */ | |
1617 | if (!(pTcon->ses->flags & CIFS_SES_NT4)) | |
1618 | rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf, | |
737b758c SF |
1619 | cifs_sb->local_nls, |
1620 | cifs_sb->mnt_cifs_flags & | |
1621 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
1622 | else |
1623 | rc = -EOPNOTSUPP; | |
1624 | ||
1625 | if (rc == -EOPNOTSUPP) { | |
1626 | int oplock = FALSE; | |
1627 | __u16 netfid; | |
1628 | ||
1629 | cFYI(1, ("calling SetFileInfo since SetPathInfo for " | |
1630 | "times not supported by this server")); | |
1631 | /* BB we could scan to see if we already have it open | |
1632 | and pass in pid of opener to function */ | |
1633 | rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, | |
1634 | SYNCHRONIZE | FILE_WRITE_ATTRIBUTES, | |
1635 | CREATE_NOT_DIR, &netfid, &oplock, | |
737b758c SF |
1636 | NULL, cifs_sb->local_nls, |
1637 | cifs_sb->mnt_cifs_flags & | |
1638 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
fb8c4b14 | 1639 | if (rc == 0) { |
1da177e4 LT |
1640 | rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf, |
1641 | netfid); | |
1642 | CIFSSMBClose(xid, pTcon, netfid); | |
1643 | } else { | |
1644 | /* BB For even older servers we could convert time_buf | |
1645 | into old DOS style which uses two second | |
1646 | granularity */ | |
1647 | ||
1648 | /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path, | |
fb8c4b14 | 1649 | &time_buf, cifs_sb->local_nls); */ |
1da177e4 LT |
1650 | } |
1651 | } | |
e30dcf3a SF |
1652 | /* Even if error on time set, no sense failing the call if |
1653 | the server would set the time to a reasonable value anyway, | |
1654 | and this check ensures that we are not being called from | |
1655 | sys_utimes in which case we ought to fail the call back to | |
1656 | the user when the server rejects the call */ | |
fb8c4b14 | 1657 | if ((rc) && (attrs->ia_valid & |
e30dcf3a SF |
1658 | (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE))) |
1659 | rc = 0; | |
1da177e4 LT |
1660 | } |
1661 | ||
1662 | /* do not need local check to inode_check_ok since the server does | |
1663 | that */ | |
1664 | if (!rc) | |
1665 | rc = inode_setattr(direntry->d_inode, attrs); | |
e30dcf3a | 1666 | cifs_setattr_exit: |
1da177e4 LT |
1667 | kfree(full_path); |
1668 | FreeXid(xid); | |
1669 | return rc; | |
1670 | } | |
1671 | ||
99ee4dbd | 1672 | #if 0 |
1da177e4 LT |
1673 | void cifs_delete_inode(struct inode *inode) |
1674 | { | |
26a21b98 | 1675 | cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode)); |
1da177e4 LT |
1676 | /* may have to add back in if and when safe distributed caching of |
1677 | directories added e.g. via FindNotify */ | |
1678 | } | |
99ee4dbd | 1679 | #endif |