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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/cifs/inode.c | |
3 | * | |
2dd29d31 | 4 | * Copyright (C) International Business Machines Corp., 2002,2007 |
1da177e4 LT |
5 | * Author(s): Steve French (sfrench@us.ibm.com) |
6 | * | |
7 | * This library is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU Lesser General Public License as published | |
9 | * by the Free Software Foundation; either version 2.1 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This library is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
15 | * the GNU Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public License | |
18 | * along with this library; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
21 | #include <linux/fs.h> | |
1da177e4 LT |
22 | #include <linux/stat.h> |
23 | #include <linux/pagemap.h> | |
24 | #include <asm/div64.h> | |
25 | #include "cifsfs.h" | |
26 | #include "cifspdu.h" | |
27 | #include "cifsglob.h" | |
28 | #include "cifsproto.h" | |
29 | #include "cifs_debug.h" | |
30 | #include "cifs_fs_sb.h" | |
31 | ||
70eff55d | 32 | |
7962670e | 33 | static void cifs_set_ops(struct inode *inode, const bool is_dfs_referral) |
70eff55d CH |
34 | { |
35 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
36 | ||
37 | switch (inode->i_mode & S_IFMT) { | |
38 | case S_IFREG: | |
39 | inode->i_op = &cifs_file_inode_ops; | |
40 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { | |
41 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
42 | inode->i_fop = &cifs_file_direct_nobrl_ops; | |
43 | else | |
44 | inode->i_fop = &cifs_file_direct_ops; | |
45 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
46 | inode->i_fop = &cifs_file_nobrl_ops; | |
47 | else { /* not direct, send byte range locks */ | |
48 | inode->i_fop = &cifs_file_ops; | |
49 | } | |
50 | ||
51 | ||
52 | /* check if server can support readpages */ | |
53 | if (cifs_sb->tcon->ses->server->maxBuf < | |
54 | PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE) | |
55 | inode->i_data.a_ops = &cifs_addr_ops_smallbuf; | |
56 | else | |
57 | inode->i_data.a_ops = &cifs_addr_ops; | |
58 | break; | |
59 | case S_IFDIR: | |
7962670e IM |
60 | if (is_dfs_referral) { |
61 | inode->i_op = &cifs_dfs_referral_inode_operations; | |
62 | } else { | |
63 | inode->i_op = &cifs_dir_inode_ops; | |
64 | inode->i_fop = &cifs_dir_ops; | |
65 | } | |
70eff55d CH |
66 | break; |
67 | case S_IFLNK: | |
68 | inode->i_op = &cifs_symlink_inode_ops; | |
69 | break; | |
70 | default: | |
71 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
72 | break; | |
73 | } | |
74 | } | |
75 | ||
75f12983 CH |
76 | static void cifs_unix_info_to_inode(struct inode *inode, |
77 | FILE_UNIX_BASIC_INFO *info, int force_uid_gid) | |
78 | { | |
79 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
80 | struct cifsInodeInfo *cifsInfo = CIFS_I(inode); | |
81 | __u64 num_of_bytes = le64_to_cpu(info->NumOfBytes); | |
82 | __u64 end_of_file = le64_to_cpu(info->EndOfFile); | |
83 | ||
84 | inode->i_atime = cifs_NTtimeToUnix(le64_to_cpu(info->LastAccessTime)); | |
85 | inode->i_mtime = | |
86 | cifs_NTtimeToUnix(le64_to_cpu(info->LastModificationTime)); | |
87 | inode->i_ctime = cifs_NTtimeToUnix(le64_to_cpu(info->LastStatusChange)); | |
88 | inode->i_mode = le64_to_cpu(info->Permissions); | |
89 | ||
90 | /* | |
91 | * Since we set the inode type below we need to mask off | |
92 | * to avoid strange results if bits set above. | |
93 | */ | |
94 | inode->i_mode &= ~S_IFMT; | |
95 | switch (le32_to_cpu(info->Type)) { | |
96 | case UNIX_FILE: | |
97 | inode->i_mode |= S_IFREG; | |
98 | break; | |
99 | case UNIX_SYMLINK: | |
100 | inode->i_mode |= S_IFLNK; | |
101 | break; | |
102 | case UNIX_DIR: | |
103 | inode->i_mode |= S_IFDIR; | |
104 | break; | |
105 | case UNIX_CHARDEV: | |
106 | inode->i_mode |= S_IFCHR; | |
107 | inode->i_rdev = MKDEV(le64_to_cpu(info->DevMajor), | |
108 | le64_to_cpu(info->DevMinor) & MINORMASK); | |
109 | break; | |
110 | case UNIX_BLOCKDEV: | |
111 | inode->i_mode |= S_IFBLK; | |
112 | inode->i_rdev = MKDEV(le64_to_cpu(info->DevMajor), | |
113 | le64_to_cpu(info->DevMinor) & MINORMASK); | |
114 | break; | |
115 | case UNIX_FIFO: | |
116 | inode->i_mode |= S_IFIFO; | |
117 | break; | |
118 | case UNIX_SOCKET: | |
119 | inode->i_mode |= S_IFSOCK; | |
120 | break; | |
121 | default: | |
122 | /* safest to call it a file if we do not know */ | |
123 | inode->i_mode |= S_IFREG; | |
124 | cFYI(1, ("unknown type %d", le32_to_cpu(info->Type))); | |
125 | break; | |
126 | } | |
127 | ||
128 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) && | |
129 | !force_uid_gid) | |
130 | inode->i_uid = cifs_sb->mnt_uid; | |
131 | else | |
132 | inode->i_uid = le64_to_cpu(info->Uid); | |
133 | ||
134 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) && | |
135 | !force_uid_gid) | |
136 | inode->i_gid = cifs_sb->mnt_gid; | |
137 | else | |
138 | inode->i_gid = le64_to_cpu(info->Gid); | |
139 | ||
140 | inode->i_nlink = le64_to_cpu(info->Nlinks); | |
141 | ||
142 | spin_lock(&inode->i_lock); | |
143 | if (is_size_safe_to_change(cifsInfo, end_of_file)) { | |
144 | /* | |
145 | * We can not safely change the file size here if the client | |
146 | * is writing to it due to potential races. | |
147 | */ | |
148 | i_size_write(inode, end_of_file); | |
149 | ||
150 | /* | |
151 | * i_blocks is not related to (i_size / i_blksize), | |
152 | * but instead 512 byte (2**9) size is required for | |
153 | * calculating num blocks. | |
154 | */ | |
155 | inode->i_blocks = (512 - 1 + num_of_bytes) >> 9; | |
156 | } | |
157 | spin_unlock(&inode->i_lock); | |
158 | } | |
159 | ||
7962670e IM |
160 | static const unsigned char *cifs_get_search_path(struct cifsTconInfo *pTcon, |
161 | const char *search_path) | |
162 | { | |
163 | int tree_len; | |
164 | int path_len; | |
165 | char *tmp_path; | |
166 | ||
167 | if (!(pTcon->Flags & SMB_SHARE_IS_IN_DFS)) | |
168 | return search_path; | |
169 | ||
170 | /* use full path name for working with DFS */ | |
171 | tree_len = strnlen(pTcon->treeName, MAX_TREE_SIZE + 1); | |
172 | path_len = strnlen(search_path, MAX_PATHCONF); | |
173 | ||
174 | tmp_path = kmalloc(tree_len+path_len+1, GFP_KERNEL); | |
175 | if (tmp_path == NULL) | |
176 | return search_path; | |
177 | ||
178 | strncpy(tmp_path, pTcon->treeName, tree_len); | |
179 | strncpy(tmp_path+tree_len, search_path, path_len); | |
180 | tmp_path[tree_len+path_len] = 0; | |
181 | return tmp_path; | |
182 | } | |
183 | ||
1da177e4 LT |
184 | int cifs_get_inode_info_unix(struct inode **pinode, |
185 | const unsigned char *search_path, struct super_block *sb, int xid) | |
186 | { | |
187 | int rc = 0; | |
188 | FILE_UNIX_BASIC_INFO findData; | |
189 | struct cifsTconInfo *pTcon; | |
190 | struct inode *inode; | |
191 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
7962670e IM |
192 | const unsigned char *full_path; |
193 | bool is_dfs_referral = false; | |
1da177e4 LT |
194 | |
195 | pTcon = cifs_sb->tcon; | |
26a21b98 | 196 | cFYI(1, ("Getting info on %s", search_path)); |
7962670e IM |
197 | |
198 | full_path = cifs_get_search_path(pTcon, search_path); | |
199 | ||
200 | try_again_CIFSSMBUnixQPathInfo: | |
1da177e4 | 201 | /* could have done a find first instead but this returns more info */ |
7962670e | 202 | rc = CIFSSMBUnixQPathInfo(xid, pTcon, full_path, &findData, |
737b758c SF |
203 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
204 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
205 | /* dump_mem("\nUnixQPathInfo return data", &findData, |
206 | sizeof(findData)); */ | |
207 | if (rc) { | |
7962670e IM |
208 | if (rc == -EREMOTE && !is_dfs_referral) { |
209 | is_dfs_referral = true; | |
210 | full_path = search_path; | |
211 | goto try_again_CIFSSMBUnixQPathInfo; | |
1da177e4 | 212 | } |
7962670e | 213 | goto cgiiu_exit; |
1da177e4 LT |
214 | } else { |
215 | struct cifsInodeInfo *cifsInfo; | |
1da177e4 LT |
216 | __u64 num_of_bytes = le64_to_cpu(findData.NumOfBytes); |
217 | __u64 end_of_file = le64_to_cpu(findData.EndOfFile); | |
218 | ||
219 | /* get new inode */ | |
220 | if (*pinode == NULL) { | |
221 | *pinode = new_inode(sb); | |
7962670e IM |
222 | if (*pinode == NULL) { |
223 | rc = -ENOMEM; | |
224 | goto cgiiu_exit; | |
225 | } | |
1da177e4 LT |
226 | /* Is an i_ino of zero legal? */ |
227 | /* Are there sanity checks we can use to ensure that | |
228 | the server is really filling in that field? */ | |
d0d2f2df | 229 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
1da177e4 LT |
230 | (*pinode)->i_ino = |
231 | (unsigned long)findData.UniqueId; | |
232 | } /* note ino incremented to unique num in new_inode */ | |
4523cc30 | 233 | if (sb->s_flags & MS_NOATIME) |
1b2b2126 | 234 | (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME; |
50c2f753 | 235 | |
1da177e4 LT |
236 | insert_inode_hash(*pinode); |
237 | } | |
238 | ||
239 | inode = *pinode; | |
240 | cifsInfo = CIFS_I(inode); | |
241 | ||
26a21b98 | 242 | cFYI(1, ("Old time %ld", cifsInfo->time)); |
1da177e4 | 243 | cifsInfo->time = jiffies; |
26a21b98 | 244 | cFYI(1, ("New time %ld", cifsInfo->time)); |
1da177e4 | 245 | /* this is ok to set on every inode revalidate */ |
fb8c4b14 | 246 | atomic_set(&cifsInfo->inUse, 1); |
1da177e4 | 247 | |
75f12983 | 248 | cifs_unix_info_to_inode(inode, &findData, 0); |
1da177e4 | 249 | |
1da177e4 LT |
250 | |
251 | if (num_of_bytes < end_of_file) | |
8b94bcb9 | 252 | cFYI(1, ("allocation size less than end of file")); |
5515eff8 AM |
253 | cFYI(1, ("Size %ld and blocks %llu", |
254 | (unsigned long) inode->i_size, | |
255 | (unsigned long long)inode->i_blocks)); | |
70eff55d | 256 | |
7962670e | 257 | cifs_set_ops(inode, is_dfs_referral); |
1da177e4 | 258 | } |
7962670e IM |
259 | cgiiu_exit: |
260 | if (full_path != search_path) | |
261 | kfree(full_path); | |
1da177e4 LT |
262 | return rc; |
263 | } | |
264 | ||
fb8c4b14 | 265 | static int decode_sfu_inode(struct inode *inode, __u64 size, |
d6e2f2a4 SF |
266 | const unsigned char *path, |
267 | struct cifs_sb_info *cifs_sb, int xid) | |
268 | { | |
269 | int rc; | |
270 | int oplock = FALSE; | |
271 | __u16 netfid; | |
272 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
86c96b4b | 273 | char buf[24]; |
d6e2f2a4 | 274 | unsigned int bytes_read; |
fb8c4b14 | 275 | char *pbuf; |
d6e2f2a4 SF |
276 | |
277 | pbuf = buf; | |
278 | ||
4523cc30 | 279 | if (size == 0) { |
d6e2f2a4 SF |
280 | inode->i_mode |= S_IFIFO; |
281 | return 0; | |
282 | } else if (size < 8) { | |
283 | return -EINVAL; /* EOPNOTSUPP? */ | |
284 | } | |
50c2f753 | 285 | |
d6e2f2a4 SF |
286 | rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ, |
287 | CREATE_NOT_DIR, &netfid, &oplock, NULL, | |
288 | cifs_sb->local_nls, | |
289 | cifs_sb->mnt_cifs_flags & | |
290 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
fb8c4b14 | 291 | if (rc == 0) { |
ec637e3f | 292 | int buf_type = CIFS_NO_BUFFER; |
d6e2f2a4 SF |
293 | /* Read header */ |
294 | rc = CIFSSMBRead(xid, pTcon, | |
fb8c4b14 | 295 | netfid, |
86c96b4b | 296 | 24 /* length */, 0 /* offset */, |
ec637e3f | 297 | &bytes_read, &pbuf, &buf_type); |
4523cc30 SF |
298 | if ((rc == 0) && (bytes_read >= 8)) { |
299 | if (memcmp("IntxBLK", pbuf, 8) == 0) { | |
fb8c4b14 | 300 | cFYI(1, ("Block device")); |
3020a1f5 | 301 | inode->i_mode |= S_IFBLK; |
4523cc30 | 302 | if (bytes_read == 24) { |
86c96b4b SF |
303 | /* we have enough to decode dev num */ |
304 | __u64 mjr; /* major */ | |
305 | __u64 mnr; /* minor */ | |
306 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); | |
307 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); | |
308 | inode->i_rdev = MKDEV(mjr, mnr); | |
309 | } | |
4523cc30 | 310 | } else if (memcmp("IntxCHR", pbuf, 8) == 0) { |
fb8c4b14 | 311 | cFYI(1, ("Char device")); |
3020a1f5 | 312 | inode->i_mode |= S_IFCHR; |
4523cc30 | 313 | if (bytes_read == 24) { |
86c96b4b SF |
314 | /* we have enough to decode dev num */ |
315 | __u64 mjr; /* major */ | |
316 | __u64 mnr; /* minor */ | |
317 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); | |
318 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); | |
319 | inode->i_rdev = MKDEV(mjr, mnr); | |
fb8c4b14 | 320 | } |
4523cc30 | 321 | } else if (memcmp("IntxLNK", pbuf, 7) == 0) { |
fb8c4b14 | 322 | cFYI(1, ("Symlink")); |
3020a1f5 | 323 | inode->i_mode |= S_IFLNK; |
86c96b4b SF |
324 | } else { |
325 | inode->i_mode |= S_IFREG; /* file? */ | |
fb8c4b14 | 326 | rc = -EOPNOTSUPP; |
86c96b4b | 327 | } |
3020a1f5 SF |
328 | } else { |
329 | inode->i_mode |= S_IFREG; /* then it is a file */ | |
fb8c4b14 SF |
330 | rc = -EOPNOTSUPP; /* or some unknown SFU type */ |
331 | } | |
d6e2f2a4 | 332 | CIFSSMBClose(xid, pTcon, netfid); |
d6e2f2a4 SF |
333 | } |
334 | return rc; | |
d6e2f2a4 SF |
335 | } |
336 | ||
9e294f1c SF |
337 | #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */ |
338 | ||
953f8681 | 339 | static int get_sfu_mode(struct inode *inode, |
9e294f1c SF |
340 | const unsigned char *path, |
341 | struct cifs_sb_info *cifs_sb, int xid) | |
342 | { | |
3020a1f5 | 343 | #ifdef CONFIG_CIFS_XATTR |
9e294f1c SF |
344 | ssize_t rc; |
345 | char ea_value[4]; | |
346 | __u32 mode; | |
347 | ||
348 | rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS", | |
349 | ea_value, 4 /* size of buf */, cifs_sb->local_nls, | |
fb8c4b14 | 350 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
4523cc30 | 351 | if (rc < 0) |
9e294f1c SF |
352 | return (int)rc; |
353 | else if (rc > 3) { | |
354 | mode = le32_to_cpu(*((__le32 *)ea_value)); | |
fb8c4b14 SF |
355 | inode->i_mode &= ~SFBITS_MASK; |
356 | cFYI(1, ("special bits 0%o org mode 0%o", mode, inode->i_mode)); | |
9e294f1c | 357 | inode->i_mode = (mode & SFBITS_MASK) | inode->i_mode; |
fb8c4b14 | 358 | cFYI(1, ("special mode bits 0%o", mode)); |
9e294f1c SF |
359 | return 0; |
360 | } else { | |
361 | return 0; | |
362 | } | |
3020a1f5 SF |
363 | #else |
364 | return -EOPNOTSUPP; | |
365 | #endif | |
9e294f1c SF |
366 | } |
367 | ||
1da177e4 LT |
368 | int cifs_get_inode_info(struct inode **pinode, |
369 | const unsigned char *search_path, FILE_ALL_INFO *pfindData, | |
370 | struct super_block *sb, int xid) | |
371 | { | |
372 | int rc = 0; | |
373 | struct cifsTconInfo *pTcon; | |
374 | struct inode *inode; | |
375 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
7962670e | 376 | const unsigned char *full_path = NULL; |
1da177e4 | 377 | char *buf = NULL; |
8d6286fd | 378 | int adjustTZ = FALSE; |
7962670e | 379 | bool is_dfs_referral = false; |
1da177e4 LT |
380 | |
381 | pTcon = cifs_sb->tcon; | |
fb8c4b14 | 382 | cFYI(1, ("Getting info on %s", search_path)); |
1da177e4 | 383 | |
d0d2f2df SF |
384 | if ((pfindData == NULL) && (*pinode != NULL)) { |
385 | if (CIFS_I(*pinode)->clientCanCacheRead) { | |
fb8c4b14 | 386 | cFYI(1, ("No need to revalidate cached inode sizes")); |
1da177e4 LT |
387 | return rc; |
388 | } | |
389 | } | |
390 | ||
391 | /* if file info not passed in then get it from server */ | |
d0d2f2df | 392 | if (pfindData == NULL) { |
1da177e4 | 393 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
d0d2f2df | 394 | if (buf == NULL) |
1da177e4 LT |
395 | return -ENOMEM; |
396 | pfindData = (FILE_ALL_INFO *)buf; | |
7962670e IM |
397 | |
398 | full_path = cifs_get_search_path(pTcon, search_path); | |
399 | ||
400 | try_again_CIFSSMBQPathInfo: | |
1da177e4 | 401 | /* could do find first instead but this returns more info */ |
7962670e | 402 | rc = CIFSSMBQPathInfo(xid, pTcon, full_path, pfindData, |
acf1a1b1 | 403 | 0 /* not legacy */, |
6b8edfe0 | 404 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
737b758c | 405 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
6b8edfe0 SF |
406 | /* BB optimize code so we do not make the above call |
407 | when server claims no NT SMB support and the above call | |
408 | failed at least once - set flag in tcon or mount */ | |
4523cc30 | 409 | if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) { |
7962670e | 410 | rc = SMBQueryInformation(xid, pTcon, full_path, |
fb8c4b14 | 411 | pfindData, cifs_sb->local_nls, |
6b8edfe0 SF |
412 | cifs_sb->mnt_cifs_flags & |
413 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
8d6286fd | 414 | adjustTZ = TRUE; |
6b8edfe0 | 415 | } |
1da177e4 LT |
416 | } |
417 | /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */ | |
418 | if (rc) { | |
7962670e IM |
419 | if (rc == -EREMOTE && !is_dfs_referral) { |
420 | is_dfs_referral = true; | |
421 | full_path = search_path; | |
422 | goto try_again_CIFSSMBQPathInfo; | |
1da177e4 | 423 | } |
7962670e | 424 | goto cgii_exit; |
1da177e4 LT |
425 | } else { |
426 | struct cifsInodeInfo *cifsInfo; | |
427 | __u32 attr = le32_to_cpu(pfindData->Attributes); | |
428 | ||
429 | /* get new inode */ | |
430 | if (*pinode == NULL) { | |
431 | *pinode = new_inode(sb); | |
acf1a1b1 | 432 | if (*pinode == NULL) { |
7962670e IM |
433 | rc = -ENOMEM; |
434 | goto cgii_exit; | |
acf1a1b1 | 435 | } |
1da177e4 LT |
436 | /* Is an i_ino of zero legal? Can we use that to check |
437 | if the server supports returning inode numbers? Are | |
438 | there other sanity checks we can use to ensure that | |
439 | the server is really filling in that field? */ | |
440 | ||
441 | /* We can not use the IndexNumber field by default from | |
442 | Windows or Samba (in ALL_INFO buf) but we can request | |
443 | it explicitly. It may not be unique presumably if | |
444 | the server has multiple devices mounted under one | |
445 | share */ | |
446 | ||
447 | /* There may be higher info levels that work but are | |
448 | there Windows server or network appliances for which | |
449 | IndexNumber field is not guaranteed unique? */ | |
450 | ||
fb8c4b14 | 451 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
1da177e4 LT |
452 | int rc1 = 0; |
453 | __u64 inode_num; | |
454 | ||
fb8c4b14 SF |
455 | rc1 = CIFSGetSrvInodeNumber(xid, pTcon, |
456 | search_path, &inode_num, | |
737b758c SF |
457 | cifs_sb->local_nls, |
458 | cifs_sb->mnt_cifs_flags & | |
459 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
d0d2f2df | 460 | if (rc1) { |
fb8c4b14 | 461 | cFYI(1, ("GetSrvInodeNum rc %d", rc1)); |
1da177e4 LT |
462 | /* BB EOPNOSUPP disable SERVER_INUM? */ |
463 | } else /* do we need cast or hash to ino? */ | |
464 | (*pinode)->i_ino = inode_num; | |
465 | } /* else ino incremented to unique num in new_inode*/ | |
4523cc30 | 466 | if (sb->s_flags & MS_NOATIME) |
1b2b2126 | 467 | (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME; |
1da177e4 LT |
468 | insert_inode_hash(*pinode); |
469 | } | |
470 | inode = *pinode; | |
471 | cifsInfo = CIFS_I(inode); | |
472 | cifsInfo->cifsAttrs = attr; | |
26a21b98 | 473 | cFYI(1, ("Old time %ld", cifsInfo->time)); |
1da177e4 | 474 | cifsInfo->time = jiffies; |
26a21b98 | 475 | cFYI(1, ("New time %ld", cifsInfo->time)); |
1da177e4 LT |
476 | |
477 | /* blksize needs to be multiple of two. So safer to default to | |
478 | blksize and blkbits set in superblock so 2**blkbits and blksize | |
479 | will match rather than setting to: | |
480 | (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/ | |
481 | ||
26a21b98 | 482 | /* Linux can not store file creation time so ignore it */ |
4523cc30 | 483 | if (pfindData->LastAccessTime) |
1bd5bbcb SF |
484 | inode->i_atime = cifs_NTtimeToUnix |
485 | (le64_to_cpu(pfindData->LastAccessTime)); | |
486 | else /* do not need to use current_fs_time - time not stored */ | |
487 | inode->i_atime = CURRENT_TIME; | |
1da177e4 LT |
488 | inode->i_mtime = |
489 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime)); | |
490 | inode->i_ctime = | |
491 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime)); | |
26a21b98 | 492 | cFYI(0, ("Attributes came in as 0x%x", attr)); |
4523cc30 | 493 | if (adjustTZ && (pTcon->ses) && (pTcon->ses->server)) { |
8d6286fd | 494 | inode->i_ctime.tv_sec += pTcon->ses->server->timeAdj; |
fb8c4b14 | 495 | inode->i_mtime.tv_sec += pTcon->ses->server->timeAdj; |
8d6286fd | 496 | } |
1da177e4 LT |
497 | |
498 | /* set default mode. will override for dirs below */ | |
499 | if (atomic_read(&cifsInfo->inUse) == 0) | |
500 | /* new inode, can safely set these fields */ | |
501 | inode->i_mode = cifs_sb->mnt_file_mode; | |
3020a1f5 | 502 | else /* since we set the inode type below we need to mask off |
fb8c4b14 SF |
503 | to avoid strange results if type changes and both |
504 | get orred in */ | |
505 | inode->i_mode &= ~S_IFMT; | |
1da177e4 LT |
506 | /* if (attr & ATTR_REPARSE) */ |
507 | /* We no longer handle these as symlinks because we could not | |
508 | follow them due to the absolute path with drive letter */ | |
509 | if (attr & ATTR_DIRECTORY) { | |
510 | /* override default perms since we do not do byte range locking | |
511 | on dirs */ | |
512 | inode->i_mode = cifs_sb->mnt_dir_mode; | |
513 | inode->i_mode |= S_IFDIR; | |
eda3c029 SF |
514 | } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) && |
515 | (cifsInfo->cifsAttrs & ATTR_SYSTEM) && | |
516 | /* No need to le64 convert size of zero */ | |
517 | (pfindData->EndOfFile == 0)) { | |
518 | inode->i_mode = cifs_sb->mnt_file_mode; | |
519 | inode->i_mode |= S_IFIFO; | |
d6e2f2a4 SF |
520 | /* BB Finish for SFU style symlinks and devices */ |
521 | } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) && | |
522 | (cifsInfo->cifsAttrs & ATTR_SYSTEM)) { | |
fb8c4b14 | 523 | if (decode_sfu_inode(inode, |
d6e2f2a4 SF |
524 | le64_to_cpu(pfindData->EndOfFile), |
525 | search_path, | |
ad7a2926 | 526 | cifs_sb, xid)) |
fb8c4b14 | 527 | cFYI(1, ("Unrecognized sfu inode type")); |
ad7a2926 | 528 | |
fb8c4b14 | 529 | cFYI(1, ("sfu mode 0%o", inode->i_mode)); |
1da177e4 LT |
530 | } else { |
531 | inode->i_mode |= S_IFREG; | |
532 | /* treat the dos attribute of read-only as read-only | |
533 | mode e.g. 555 */ | |
534 | if (cifsInfo->cifsAttrs & ATTR_READONLY) | |
535 | inode->i_mode &= ~(S_IWUGO); | |
f5c1e2ea AT |
536 | else if ((inode->i_mode & S_IWUGO) == 0) |
537 | /* the ATTR_READONLY flag may have been */ | |
538 | /* changed on server -- set any w bits */ | |
539 | /* allowed by mnt_file_mode */ | |
540 | inode->i_mode |= (S_IWUGO & | |
541 | cifs_sb->mnt_file_mode); | |
1da177e4 LT |
542 | /* BB add code here - |
543 | validate if device or weird share or device type? */ | |
544 | } | |
50c2f753 | 545 | |
3677db10 | 546 | spin_lock(&inode->i_lock); |
f6d09982 SF |
547 | if (is_size_safe_to_change(cifsInfo, |
548 | le64_to_cpu(pfindData->EndOfFile))) { | |
7ba52631 | 549 | /* can not safely shrink the file size here if the |
1da177e4 | 550 | client is writing to it due to potential races */ |
fb8c4b14 | 551 | i_size_write(inode, le64_to_cpu(pfindData->EndOfFile)); |
1da177e4 LT |
552 | |
553 | /* 512 bytes (2**9) is the fake blocksize that must be | |
554 | used for this calculation */ | |
555 | inode->i_blocks = (512 - 1 + le64_to_cpu( | |
556 | pfindData->AllocationSize)) >> 9; | |
557 | } | |
3677db10 | 558 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
559 | |
560 | inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks); | |
561 | ||
fb8c4b14 | 562 | /* BB fill in uid and gid here? with help from winbind? |
1da177e4 | 563 | or retrieve from NTFS stream extended attribute */ |
4879b448 | 564 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
953f8681 | 565 | /* fill in 0777 bits from ACL */ |
4879b448 SF |
566 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { |
567 | cFYI(1, ("Getting mode bits from ACL")); | |
630f3f0c | 568 | acl_to_uid_mode(inode, search_path); |
4879b448 SF |
569 | } |
570 | #endif | |
4523cc30 | 571 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { |
953f8681 SF |
572 | /* fill in remaining high mode bits e.g. SUID, VTX */ |
573 | get_sfu_mode(inode, search_path, cifs_sb, xid); | |
9e294f1c | 574 | } else if (atomic_read(&cifsInfo->inUse) == 0) { |
1da177e4 LT |
575 | inode->i_uid = cifs_sb->mnt_uid; |
576 | inode->i_gid = cifs_sb->mnt_gid; | |
577 | /* set so we do not keep refreshing these fields with | |
578 | bad data after user has changed them in memory */ | |
fb8c4b14 | 579 | atomic_set(&cifsInfo->inUse, 1); |
1da177e4 LT |
580 | } |
581 | ||
7962670e | 582 | cifs_set_ops(inode, is_dfs_referral); |
1da177e4 | 583 | } |
7962670e IM |
584 | cgii_exit: |
585 | if (full_path != search_path) | |
586 | kfree(full_path); | |
1da177e4 LT |
587 | kfree(buf); |
588 | return rc; | |
589 | } | |
590 | ||
7f8ed420 SF |
591 | static const struct inode_operations cifs_ipc_inode_ops = { |
592 | .lookup = cifs_lookup, | |
593 | }; | |
594 | ||
1da177e4 | 595 | /* gets root inode */ |
ce634ab2 | 596 | struct inode *cifs_iget(struct super_block *sb, unsigned long ino) |
1da177e4 | 597 | { |
ce634ab2 | 598 | int xid; |
1da177e4 | 599 | struct cifs_sb_info *cifs_sb; |
ce634ab2 DH |
600 | struct inode *inode; |
601 | long rc; | |
602 | ||
603 | inode = iget_locked(sb, ino); | |
604 | if (!inode) | |
605 | return ERR_PTR(-ENOMEM); | |
606 | if (!(inode->i_state & I_NEW)) | |
607 | return inode; | |
1da177e4 LT |
608 | |
609 | cifs_sb = CIFS_SB(inode->i_sb); | |
610 | xid = GetXid(); | |
c18c842b SF |
611 | |
612 | if (cifs_sb->tcon->unix_ext) | |
7f8ed420 | 613 | rc = cifs_get_inode_info_unix(&inode, "", inode->i_sb, xid); |
1da177e4 | 614 | else |
7f8ed420 SF |
615 | rc = cifs_get_inode_info(&inode, "", NULL, inode->i_sb, xid); |
616 | if (rc && cifs_sb->tcon->ipc) { | |
617 | cFYI(1, ("ipc connection - fake read inode")); | |
618 | inode->i_mode |= S_IFDIR; | |
619 | inode->i_nlink = 2; | |
620 | inode->i_op = &cifs_ipc_inode_ops; | |
621 | inode->i_fop = &simple_dir_operations; | |
622 | inode->i_uid = cifs_sb->mnt_uid; | |
623 | inode->i_gid = cifs_sb->mnt_gid; | |
ce634ab2 DH |
624 | _FreeXid(xid); |
625 | iget_failed(inode); | |
626 | return ERR_PTR(rc); | |
7f8ed420 SF |
627 | } |
628 | ||
ce634ab2 DH |
629 | unlock_new_inode(inode); |
630 | ||
631 | /* can not call macro FreeXid here since in a void func | |
632 | * TODO: This is no longer true | |
633 | */ | |
1da177e4 | 634 | _FreeXid(xid); |
ce634ab2 | 635 | return inode; |
1da177e4 LT |
636 | } |
637 | ||
638 | int cifs_unlink(struct inode *inode, struct dentry *direntry) | |
639 | { | |
640 | int rc = 0; | |
641 | int xid; | |
642 | struct cifs_sb_info *cifs_sb; | |
643 | struct cifsTconInfo *pTcon; | |
644 | char *full_path = NULL; | |
645 | struct cifsInodeInfo *cifsInode; | |
646 | FILE_BASIC_INFO *pinfo_buf; | |
647 | ||
06bcfedd | 648 | cFYI(1, ("cifs_unlink, inode = 0x%p", inode)); |
1da177e4 LT |
649 | |
650 | xid = GetXid(); | |
651 | ||
4523cc30 | 652 | if (inode) |
6910ab30 SF |
653 | cifs_sb = CIFS_SB(inode->i_sb); |
654 | else | |
06bcfedd | 655 | cifs_sb = CIFS_SB(direntry->d_sb); |
1da177e4 LT |
656 | pTcon = cifs_sb->tcon; |
657 | ||
658 | /* Unlink can be called from rename so we can not grab the sem here | |
659 | since we deadlock otherwise */ | |
a11f3a05 | 660 | /* mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/ |
7f57356b | 661 | full_path = build_path_from_dentry(direntry); |
a11f3a05 | 662 | /* mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/ |
1da177e4 LT |
663 | if (full_path == NULL) { |
664 | FreeXid(xid); | |
665 | return -ENOMEM; | |
666 | } | |
2d785a50 SF |
667 | |
668 | if ((pTcon->ses->capabilities & CAP_UNIX) && | |
669 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & | |
670 | le64_to_cpu(pTcon->fsUnixInfo.Capability))) { | |
671 | rc = CIFSPOSIXDelFile(xid, pTcon, full_path, | |
672 | SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls, | |
737b758c | 673 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
2d785a50 SF |
674 | cFYI(1, ("posix del rc %d", rc)); |
675 | if ((rc == 0) || (rc == -ENOENT)) | |
676 | goto psx_del_no_retry; | |
677 | } | |
1da177e4 | 678 | |
2d785a50 SF |
679 | rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls, |
680 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
681 | psx_del_no_retry: | |
1da177e4 | 682 | if (!rc) { |
d0d2f2df | 683 | if (direntry->d_inode) |
9a53c3a7 | 684 | drop_nlink(direntry->d_inode); |
1da177e4 LT |
685 | } else if (rc == -ENOENT) { |
686 | d_drop(direntry); | |
687 | } else if (rc == -ETXTBSY) { | |
688 | int oplock = FALSE; | |
689 | __u16 netfid; | |
690 | ||
691 | rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE, | |
692 | CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE, | |
737b758c | 693 | &netfid, &oplock, NULL, cifs_sb->local_nls, |
fb8c4b14 | 694 | cifs_sb->mnt_cifs_flags & |
737b758c | 695 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
fb8c4b14 | 696 | if (rc == 0) { |
1da177e4 | 697 | CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL, |
fb8c4b14 SF |
698 | cifs_sb->local_nls, |
699 | cifs_sb->mnt_cifs_flags & | |
737b758c | 700 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1da177e4 | 701 | CIFSSMBClose(xid, pTcon, netfid); |
d0d2f2df | 702 | if (direntry->d_inode) |
9a53c3a7 | 703 | drop_nlink(direntry->d_inode); |
1da177e4 LT |
704 | } |
705 | } else if (rc == -EACCES) { | |
706 | /* try only if r/o attribute set in local lookup data? */ | |
a048d7a8 | 707 | pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL); |
1da177e4 | 708 | if (pinfo_buf) { |
1da177e4 LT |
709 | /* ATTRS set to normal clears r/o bit */ |
710 | pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL); | |
711 | if (!(pTcon->ses->flags & CIFS_SES_NT4)) | |
712 | rc = CIFSSMBSetTimes(xid, pTcon, full_path, | |
713 | pinfo_buf, | |
737b758c | 714 | cifs_sb->local_nls, |
fb8c4b14 | 715 | cifs_sb->mnt_cifs_flags & |
737b758c | 716 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1da177e4 LT |
717 | else |
718 | rc = -EOPNOTSUPP; | |
719 | ||
720 | if (rc == -EOPNOTSUPP) { | |
721 | int oplock = FALSE; | |
722 | __u16 netfid; | |
723 | /* rc = CIFSSMBSetAttrLegacy(xid, pTcon, | |
724 | full_path, | |
725 | (__u16)ATTR_NORMAL, | |
fb8c4b14 | 726 | cifs_sb->local_nls); |
1da177e4 LT |
727 | For some strange reason it seems that NT4 eats the |
728 | old setattr call without actually setting the | |
729 | attributes so on to the third attempted workaround | |
730 | */ | |
731 | ||
732 | /* BB could scan to see if we already have it open | |
733 | and pass in pid of opener to function */ | |
734 | rc = CIFSSMBOpen(xid, pTcon, full_path, | |
735 | FILE_OPEN, SYNCHRONIZE | | |
736 | FILE_WRITE_ATTRIBUTES, 0, | |
737 | &netfid, &oplock, NULL, | |
737b758c | 738 | cifs_sb->local_nls, |
fb8c4b14 | 739 | cifs_sb->mnt_cifs_flags & |
737b758c | 740 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
fb8c4b14 | 741 | if (rc == 0) { |
1da177e4 LT |
742 | rc = CIFSSMBSetFileTimes(xid, pTcon, |
743 | pinfo_buf, | |
744 | netfid); | |
745 | CIFSSMBClose(xid, pTcon, netfid); | |
746 | } | |
747 | } | |
748 | kfree(pinfo_buf); | |
749 | } | |
fb8c4b14 SF |
750 | if (rc == 0) { |
751 | rc = CIFSSMBDelFile(xid, pTcon, full_path, | |
752 | cifs_sb->local_nls, | |
753 | cifs_sb->mnt_cifs_flags & | |
737b758c | 754 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1da177e4 | 755 | if (!rc) { |
d0d2f2df | 756 | if (direntry->d_inode) |
9a53c3a7 | 757 | drop_nlink(direntry->d_inode); |
1da177e4 LT |
758 | } else if (rc == -ETXTBSY) { |
759 | int oplock = FALSE; | |
760 | __u16 netfid; | |
761 | ||
762 | rc = CIFSSMBOpen(xid, pTcon, full_path, | |
763 | FILE_OPEN, DELETE, | |
764 | CREATE_NOT_DIR | | |
765 | CREATE_DELETE_ON_CLOSE, | |
766 | &netfid, &oplock, NULL, | |
fb8c4b14 SF |
767 | cifs_sb->local_nls, |
768 | cifs_sb->mnt_cifs_flags & | |
737b758c | 769 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
fb8c4b14 | 770 | if (rc == 0) { |
1da177e4 LT |
771 | CIFSSMBRenameOpenFile(xid, pTcon, |
772 | netfid, NULL, | |
737b758c SF |
773 | cifs_sb->local_nls, |
774 | cifs_sb->mnt_cifs_flags & | |
775 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 | 776 | CIFSSMBClose(xid, pTcon, netfid); |
d0d2f2df | 777 | if (direntry->d_inode) |
9a53c3a7 | 778 | drop_nlink(direntry->d_inode); |
1da177e4 LT |
779 | } |
780 | /* BB if rc = -ETXTBUSY goto the rename logic BB */ | |
781 | } | |
782 | } | |
783 | } | |
d0d2f2df | 784 | if (direntry->d_inode) { |
b2aeb9d5 SF |
785 | cifsInode = CIFS_I(direntry->d_inode); |
786 | cifsInode->time = 0; /* will force revalidate to get info | |
787 | when needed */ | |
788 | direntry->d_inode->i_ctime = current_fs_time(inode->i_sb); | |
789 | } | |
4523cc30 | 790 | if (inode) { |
06bcfedd SF |
791 | inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb); |
792 | cifsInode = CIFS_I(inode); | |
793 | cifsInode->time = 0; /* force revalidate of dir as well */ | |
794 | } | |
1da177e4 LT |
795 | |
796 | kfree(full_path); | |
797 | FreeXid(xid); | |
798 | return rc; | |
799 | } | |
800 | ||
2dd29d31 | 801 | static void posix_fill_in_inode(struct inode *tmp_inode, |
0b442d2c | 802 | FILE_UNIX_BASIC_INFO *pData, int isNewInode) |
2dd29d31 | 803 | { |
75f12983 | 804 | struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); |
2dd29d31 SF |
805 | loff_t local_size; |
806 | struct timespec local_mtime; | |
807 | ||
2dd29d31 SF |
808 | cifsInfo->time = jiffies; |
809 | atomic_inc(&cifsInfo->inUse); | |
810 | ||
811 | /* save mtime and size */ | |
812 | local_mtime = tmp_inode->i_mtime; | |
813 | local_size = tmp_inode->i_size; | |
814 | ||
75f12983 | 815 | cifs_unix_info_to_inode(tmp_inode, pData, 1); |
7962670e | 816 | cifs_set_ops(tmp_inode, false); |
50c2f753 | 817 | |
75f12983 CH |
818 | if (!S_ISREG(tmp_inode->i_mode)) |
819 | return; | |
2dd29d31 | 820 | |
75f12983 CH |
821 | /* |
822 | * No sense invalidating pages for new inode | |
823 | * since we we have not started caching | |
824 | * readahead file data yet. | |
825 | */ | |
826 | if (isNewInode) | |
827 | return; | |
2dd29d31 | 828 | |
75f12983 CH |
829 | if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && |
830 | (local_size == tmp_inode->i_size)) { | |
831 | cFYI(1, ("inode exists but unchanged")); | |
2dd29d31 | 832 | } else { |
75f12983 CH |
833 | /* file may have changed on server */ |
834 | cFYI(1, ("invalidate inode, readdir detected change")); | |
835 | invalidate_remote_inode(tmp_inode); | |
fb8c4b14 | 836 | } |
2dd29d31 SF |
837 | } |
838 | ||
1da177e4 LT |
839 | int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode) |
840 | { | |
841 | int rc = 0; | |
842 | int xid; | |
843 | struct cifs_sb_info *cifs_sb; | |
844 | struct cifsTconInfo *pTcon; | |
845 | char *full_path = NULL; | |
846 | struct inode *newinode = NULL; | |
847 | ||
6473a559 | 848 | cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode)); |
1da177e4 LT |
849 | |
850 | xid = GetXid(); | |
851 | ||
852 | cifs_sb = CIFS_SB(inode->i_sb); | |
853 | pTcon = cifs_sb->tcon; | |
854 | ||
7f57356b | 855 | full_path = build_path_from_dentry(direntry); |
1da177e4 LT |
856 | if (full_path == NULL) { |
857 | FreeXid(xid); | |
858 | return -ENOMEM; | |
859 | } | |
50c2f753 | 860 | |
fb8c4b14 SF |
861 | if ((pTcon->ses->capabilities & CAP_UNIX) && |
862 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & | |
2dd29d31 SF |
863 | le64_to_cpu(pTcon->fsUnixInfo.Capability))) { |
864 | u32 oplock = 0; | |
f6d09982 | 865 | FILE_UNIX_BASIC_INFO *pInfo = |
2dd29d31 | 866 | kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL); |
fb8c4b14 | 867 | if (pInfo == NULL) { |
2dd29d31 SF |
868 | rc = -ENOMEM; |
869 | goto mkdir_out; | |
870 | } | |
50c2f753 | 871 | |
a8cd925f | 872 | mode &= ~current->fs->umask; |
2dd29d31 SF |
873 | rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT, |
874 | mode, NULL /* netfid */, pInfo, &oplock, | |
fb8c4b14 SF |
875 | full_path, cifs_sb->local_nls, |
876 | cifs_sb->mnt_cifs_flags & | |
2dd29d31 | 877 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
c45d707f SF |
878 | if (rc == -EOPNOTSUPP) { |
879 | kfree(pInfo); | |
880 | goto mkdir_retry_old; | |
881 | } else if (rc) { | |
2dd29d31 SF |
882 | cFYI(1, ("posix mkdir returned 0x%x", rc)); |
883 | d_drop(direntry); | |
884 | } else { | |
8f2376ad CG |
885 | if (pInfo->Type == cpu_to_le32(-1)) { |
886 | /* no return info, go query for it */ | |
5a07cdf8 | 887 | kfree(pInfo); |
fb8c4b14 | 888 | goto mkdir_get_info; |
5a07cdf8 | 889 | } |
fb8c4b14 SF |
890 | /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need |
891 | to set uid/gid */ | |
2dd29d31 SF |
892 | inc_nlink(inode); |
893 | if (pTcon->nocase) | |
894 | direntry->d_op = &cifs_ci_dentry_ops; | |
895 | else | |
896 | direntry->d_op = &cifs_dentry_ops; | |
cbac3cba SF |
897 | |
898 | newinode = new_inode(inode->i_sb); | |
5a07cdf8 SF |
899 | if (newinode == NULL) { |
900 | kfree(pInfo); | |
cbac3cba | 901 | goto mkdir_get_info; |
5a07cdf8 | 902 | } |
cbac3cba SF |
903 | /* Is an i_ino of zero legal? */ |
904 | /* Are there sanity checks we can use to ensure that | |
905 | the server is really filling in that field? */ | |
906 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { | |
907 | newinode->i_ino = | |
908 | (unsigned long)pInfo->UniqueId; | |
909 | } /* note ino incremented to unique num in new_inode */ | |
fb8c4b14 | 910 | if (inode->i_sb->s_flags & MS_NOATIME) |
cbac3cba SF |
911 | newinode->i_flags |= S_NOATIME | S_NOCMTIME; |
912 | newinode->i_nlink = 2; | |
913 | ||
914 | insert_inode_hash(newinode); | |
2dd29d31 | 915 | d_instantiate(direntry, newinode); |
cbac3cba SF |
916 | |
917 | /* we already checked in POSIXCreate whether | |
918 | frame was long enough */ | |
919 | posix_fill_in_inode(direntry->d_inode, | |
0b442d2c | 920 | pInfo, 1 /* NewInode */); |
cbac3cba | 921 | #ifdef CONFIG_CIFS_DEBUG2 |
fb8c4b14 | 922 | cFYI(1, ("instantiated dentry %p %s to inode %p", |
cbac3cba SF |
923 | direntry, direntry->d_name.name, newinode)); |
924 | ||
fb8c4b14 SF |
925 | if (newinode->i_nlink != 2) |
926 | cFYI(1, ("unexpected number of links %d", | |
cbac3cba SF |
927 | newinode->i_nlink)); |
928 | #endif | |
2dd29d31 SF |
929 | } |
930 | kfree(pInfo); | |
931 | goto mkdir_out; | |
fb8c4b14 | 932 | } |
c45d707f | 933 | mkdir_retry_old: |
1da177e4 | 934 | /* BB add setting the equivalent of mode via CreateX w/ACLs */ |
737b758c SF |
935 | rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls, |
936 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 | 937 | if (rc) { |
26a21b98 | 938 | cFYI(1, ("cifs_mkdir returned 0x%x", rc)); |
1da177e4 LT |
939 | d_drop(direntry); |
940 | } else { | |
fb8c4b14 | 941 | mkdir_get_info: |
d8c76e6f | 942 | inc_nlink(inode); |
c18c842b | 943 | if (pTcon->unix_ext) |
1da177e4 | 944 | rc = cifs_get_inode_info_unix(&newinode, full_path, |
fb8c4b14 | 945 | inode->i_sb, xid); |
1da177e4 LT |
946 | else |
947 | rc = cifs_get_inode_info(&newinode, full_path, NULL, | |
fb8c4b14 | 948 | inode->i_sb, xid); |
1da177e4 | 949 | |
b92327fe SF |
950 | if (pTcon->nocase) |
951 | direntry->d_op = &cifs_ci_dentry_ops; | |
952 | else | |
953 | direntry->d_op = &cifs_dentry_ops; | |
1da177e4 | 954 | d_instantiate(direntry, newinode); |
2dd29d31 | 955 | /* setting nlink not necessary except in cases where we |
fb8c4b14 | 956 | * failed to get it from the server or was set bogus */ |
2dd29d31 | 957 | if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2)) |
fb8c4b14 | 958 | direntry->d_inode->i_nlink = 2; |
c18c842b | 959 | if (pTcon->unix_ext) { |
3ce53fc4 | 960 | mode &= ~current->fs->umask; |
d0d2f2df | 961 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
1da177e4 LT |
962 | CIFSSMBUnixSetPerms(xid, pTcon, full_path, |
963 | mode, | |
83451879 SF |
964 | (__u64)current->fsuid, |
965 | (__u64)current->fsgid, | |
1da177e4 | 966 | 0 /* dev_t */, |
737b758c SF |
967 | cifs_sb->local_nls, |
968 | cifs_sb->mnt_cifs_flags & | |
969 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
970 | } else { |
971 | CIFSSMBUnixSetPerms(xid, pTcon, full_path, | |
972 | mode, (__u64)-1, | |
973 | (__u64)-1, 0 /* dev_t */, | |
737b758c | 974 | cifs_sb->local_nls, |
fb8c4b14 | 975 | cifs_sb->mnt_cifs_flags & |
737b758c | 976 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1da177e4 | 977 | } |
3ce53fc4 | 978 | } else { |
1da177e4 LT |
979 | /* BB to be implemented via Windows secrty descriptors |
980 | eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode, | |
981 | -1, -1, local_nls); */ | |
fb8c4b14 | 982 | if (direntry->d_inode) { |
6473a559 | 983 | direntry->d_inode->i_mode = mode; |
25741b3e | 984 | direntry->d_inode->i_mode |= S_IFDIR; |
fb8c4b14 | 985 | if (cifs_sb->mnt_cifs_flags & |
6473a559 | 986 | CIFS_MOUNT_SET_UID) { |
fb8c4b14 | 987 | direntry->d_inode->i_uid = |
6473a559 | 988 | current->fsuid; |
fb8c4b14 | 989 | direntry->d_inode->i_gid = |
6473a559 SF |
990 | current->fsgid; |
991 | } | |
992 | } | |
2a138ebb | 993 | } |
1da177e4 | 994 | } |
fb8c4b14 | 995 | mkdir_out: |
1da177e4 LT |
996 | kfree(full_path); |
997 | FreeXid(xid); | |
998 | return rc; | |
999 | } | |
1000 | ||
1001 | int cifs_rmdir(struct inode *inode, struct dentry *direntry) | |
1002 | { | |
1003 | int rc = 0; | |
1004 | int xid; | |
1005 | struct cifs_sb_info *cifs_sb; | |
1006 | struct cifsTconInfo *pTcon; | |
1007 | char *full_path = NULL; | |
1008 | struct cifsInodeInfo *cifsInode; | |
1009 | ||
26a21b98 | 1010 | cFYI(1, ("cifs_rmdir, inode = 0x%p", inode)); |
1da177e4 LT |
1011 | |
1012 | xid = GetXid(); | |
1013 | ||
1014 | cifs_sb = CIFS_SB(inode->i_sb); | |
1015 | pTcon = cifs_sb->tcon; | |
1016 | ||
7f57356b | 1017 | full_path = build_path_from_dentry(direntry); |
1da177e4 LT |
1018 | if (full_path == NULL) { |
1019 | FreeXid(xid); | |
1020 | return -ENOMEM; | |
1021 | } | |
1022 | ||
737b758c SF |
1023 | rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls, |
1024 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
1025 | |
1026 | if (!rc) { | |
9a53c3a7 | 1027 | drop_nlink(inode); |
3677db10 | 1028 | spin_lock(&direntry->d_inode->i_lock); |
fb8c4b14 | 1029 | i_size_write(direntry->d_inode, 0); |
ce71ec36 | 1030 | clear_nlink(direntry->d_inode); |
3677db10 | 1031 | spin_unlock(&direntry->d_inode->i_lock); |
1da177e4 LT |
1032 | } |
1033 | ||
1034 | cifsInode = CIFS_I(direntry->d_inode); | |
1035 | cifsInode->time = 0; /* force revalidate to go get info when | |
1036 | needed */ | |
1037 | direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime = | |
1038 | current_fs_time(inode->i_sb); | |
1039 | ||
1040 | kfree(full_path); | |
1041 | FreeXid(xid); | |
1042 | return rc; | |
1043 | } | |
1044 | ||
1045 | int cifs_rename(struct inode *source_inode, struct dentry *source_direntry, | |
1046 | struct inode *target_inode, struct dentry *target_direntry) | |
1047 | { | |
1048 | char *fromName; | |
1049 | char *toName; | |
1050 | struct cifs_sb_info *cifs_sb_source; | |
1051 | struct cifs_sb_info *cifs_sb_target; | |
1052 | struct cifsTconInfo *pTcon; | |
1053 | int xid; | |
1054 | int rc = 0; | |
1055 | ||
1056 | xid = GetXid(); | |
1057 | ||
1058 | cifs_sb_target = CIFS_SB(target_inode->i_sb); | |
1059 | cifs_sb_source = CIFS_SB(source_inode->i_sb); | |
1060 | pTcon = cifs_sb_source->tcon; | |
1061 | ||
1062 | if (pTcon != cifs_sb_target->tcon) { | |
1063 | FreeXid(xid); | |
1064 | return -EXDEV; /* BB actually could be allowed if same server, | |
1065 | but different share. | |
1066 | Might eventually add support for this */ | |
1067 | } | |
1068 | ||
1069 | /* we already have the rename sem so we do not need to grab it again | |
1070 | here to protect the path integrity */ | |
7f57356b SF |
1071 | fromName = build_path_from_dentry(source_direntry); |
1072 | toName = build_path_from_dentry(target_direntry); | |
1da177e4 LT |
1073 | if ((fromName == NULL) || (toName == NULL)) { |
1074 | rc = -ENOMEM; | |
1075 | goto cifs_rename_exit; | |
1076 | } | |
1077 | ||
1078 | rc = CIFSSMBRename(xid, pTcon, fromName, toName, | |
737b758c SF |
1079 | cifs_sb_source->local_nls, |
1080 | cifs_sb_source->mnt_cifs_flags & | |
1081 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
1082 | if (rc == -EEXIST) { |
1083 | /* check if they are the same file because rename of hardlinked | |
1084 | files is a noop */ | |
1085 | FILE_UNIX_BASIC_INFO *info_buf_source; | |
1086 | FILE_UNIX_BASIC_INFO *info_buf_target; | |
1087 | ||
1088 | info_buf_source = | |
1089 | kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL); | |
1090 | if (info_buf_source != NULL) { | |
1091 | info_buf_target = info_buf_source + 1; | |
c18c842b | 1092 | if (pTcon->unix_ext) |
8e87d4dc | 1093 | rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName, |
fb8c4b14 | 1094 | info_buf_source, |
8e87d4dc SF |
1095 | cifs_sb_source->local_nls, |
1096 | cifs_sb_source->mnt_cifs_flags & | |
1097 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1098 | /* else rc is still EEXIST so will fall through to | |
1099 | unlink the target and retry rename */ | |
1da177e4 LT |
1100 | if (rc == 0) { |
1101 | rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName, | |
1102 | info_buf_target, | |
737b758c SF |
1103 | cifs_sb_target->local_nls, |
1104 | /* remap based on source sb */ | |
1105 | cifs_sb_source->mnt_cifs_flags & | |
1106 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
1107 | } |
1108 | if ((rc == 0) && | |
1109 | (info_buf_source->UniqueId == | |
1110 | info_buf_target->UniqueId)) { | |
1111 | /* do not rename since the files are hardlinked which | |
1112 | is a noop */ | |
1113 | } else { | |
1114 | /* we either can not tell the files are hardlinked | |
1115 | (as with Windows servers) or files are not | |
1116 | hardlinked so delete the target manually before | |
1117 | renaming to follow POSIX rather than Windows | |
1118 | semantics */ | |
1119 | cifs_unlink(target_inode, target_direntry); | |
1120 | rc = CIFSSMBRename(xid, pTcon, fromName, | |
1121 | toName, | |
737b758c SF |
1122 | cifs_sb_source->local_nls, |
1123 | cifs_sb_source->mnt_cifs_flags | |
1124 | & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
1125 | } |
1126 | kfree(info_buf_source); | |
1127 | } /* if we can not get memory just leave rc as EEXIST */ | |
1128 | } | |
1129 | ||
ad7a2926 | 1130 | if (rc) |
1da177e4 | 1131 | cFYI(1, ("rename rc %d", rc)); |
1da177e4 LT |
1132 | |
1133 | if ((rc == -EIO) || (rc == -EEXIST)) { | |
1134 | int oplock = FALSE; | |
1135 | __u16 netfid; | |
1136 | ||
1137 | /* BB FIXME Is Generic Read correct for rename? */ | |
1138 | /* if renaming directory - we should not say CREATE_NOT_DIR, | |
1139 | need to test renaming open directory, also GENERIC_READ | |
1140 | might not right be right access to request */ | |
1141 | rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ, | |
1142 | CREATE_NOT_DIR, &netfid, &oplock, NULL, | |
fb8c4b14 SF |
1143 | cifs_sb_source->local_nls, |
1144 | cifs_sb_source->mnt_cifs_flags & | |
737b758c | 1145 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
fb8c4b14 | 1146 | if (rc == 0) { |
8e87d4dc | 1147 | rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName, |
fb8c4b14 | 1148 | cifs_sb_source->local_nls, |
737b758c SF |
1149 | cifs_sb_source->mnt_cifs_flags & |
1150 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
1151 | CIFSSMBClose(xid, pTcon, netfid); |
1152 | } | |
1153 | } | |
1154 | ||
1155 | cifs_rename_exit: | |
1156 | kfree(fromName); | |
1157 | kfree(toName); | |
1158 | FreeXid(xid); | |
1159 | return rc; | |
1160 | } | |
1161 | ||
1162 | int cifs_revalidate(struct dentry *direntry) | |
1163 | { | |
1164 | int xid; | |
cea21805 | 1165 | int rc = 0, wbrc = 0; |
1da177e4 LT |
1166 | char *full_path; |
1167 | struct cifs_sb_info *cifs_sb; | |
1168 | struct cifsInodeInfo *cifsInode; | |
1169 | loff_t local_size; | |
1170 | struct timespec local_mtime; | |
1171 | int invalidate_inode = FALSE; | |
1172 | ||
1173 | if (direntry->d_inode == NULL) | |
1174 | return -ENOENT; | |
1175 | ||
1176 | cifsInode = CIFS_I(direntry->d_inode); | |
1177 | ||
1178 | if (cifsInode == NULL) | |
1179 | return -ENOENT; | |
1180 | ||
1181 | /* no sense revalidating inode info on file that no one can write */ | |
1182 | if (CIFS_I(direntry->d_inode)->clientCanCacheRead) | |
1183 | return rc; | |
1184 | ||
1185 | xid = GetXid(); | |
1186 | ||
1187 | cifs_sb = CIFS_SB(direntry->d_sb); | |
1188 | ||
1189 | /* can not safely grab the rename sem here if rename calls revalidate | |
1190 | since that would deadlock */ | |
7f57356b | 1191 | full_path = build_path_from_dentry(direntry); |
1da177e4 LT |
1192 | if (full_path == NULL) { |
1193 | FreeXid(xid); | |
1194 | return -ENOMEM; | |
1195 | } | |
1196 | cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld " | |
1197 | "jiffies %ld", full_path, direntry->d_inode, | |
1198 | direntry->d_inode->i_count.counter, direntry, | |
1199 | direntry->d_time, jiffies)); | |
1200 | ||
1201 | if (cifsInode->time == 0) { | |
1202 | /* was set to zero previously to force revalidate */ | |
1203 | } else if (time_before(jiffies, cifsInode->time + HZ) && | |
1204 | lookupCacheEnabled) { | |
1205 | if ((S_ISREG(direntry->d_inode->i_mode) == 0) || | |
1206 | (direntry->d_inode->i_nlink == 1)) { | |
1207 | kfree(full_path); | |
1208 | FreeXid(xid); | |
1209 | return rc; | |
1210 | } else { | |
1211 | cFYI(1, ("Have to revalidate file due to hardlinks")); | |
1212 | } | |
1213 | } | |
1214 | ||
1215 | /* save mtime and size */ | |
1216 | local_mtime = direntry->d_inode->i_mtime; | |
1217 | local_size = direntry->d_inode->i_size; | |
1218 | ||
c18c842b | 1219 | if (cifs_sb->tcon->unix_ext) { |
1da177e4 | 1220 | rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path, |
fb8c4b14 | 1221 | direntry->d_sb, xid); |
1da177e4 LT |
1222 | if (rc) { |
1223 | cFYI(1, ("error on getting revalidate info %d", rc)); | |
1224 | /* if (rc != -ENOENT) | |
1225 | rc = 0; */ /* BB should we cache info on | |
1226 | certain errors? */ | |
1227 | } | |
1228 | } else { | |
1229 | rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL, | |
fb8c4b14 | 1230 | direntry->d_sb, xid); |
1da177e4 LT |
1231 | if (rc) { |
1232 | cFYI(1, ("error on getting revalidate info %d", rc)); | |
1233 | /* if (rc != -ENOENT) | |
1234 | rc = 0; */ /* BB should we cache info on | |
1235 | certain errors? */ | |
1236 | } | |
1237 | } | |
1238 | /* should we remap certain errors, access denied?, to zero */ | |
1239 | ||
1240 | /* if not oplocked, we invalidate inode pages if mtime or file size | |
1241 | had changed on server */ | |
1242 | ||
fb8c4b14 | 1243 | if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) && |
1da177e4 LT |
1244 | (local_size == direntry->d_inode->i_size)) { |
1245 | cFYI(1, ("cifs_revalidate - inode unchanged")); | |
1246 | } else { | |
1247 | /* file may have changed on server */ | |
1248 | if (cifsInode->clientCanCacheRead) { | |
1249 | /* no need to invalidate inode pages since we were the | |
1250 | only ones who could have modified the file and the | |
1251 | server copy is staler than ours */ | |
1252 | } else { | |
1253 | invalidate_inode = TRUE; | |
1254 | } | |
1255 | } | |
1256 | ||
1257 | /* can not grab this sem since kernel filesys locking documentation | |
1b1dcc1b JS |
1258 | indicates i_mutex may be taken by the kernel on lookup and rename |
1259 | which could deadlock if we grab the i_mutex here as well */ | |
1260 | /* mutex_lock(&direntry->d_inode->i_mutex);*/ | |
1da177e4 LT |
1261 | /* need to write out dirty pages here */ |
1262 | if (direntry->d_inode->i_mapping) { | |
1263 | /* do we need to lock inode until after invalidate completes | |
1264 | below? */ | |
cea21805 JL |
1265 | wbrc = filemap_fdatawrite(direntry->d_inode->i_mapping); |
1266 | if (wbrc) | |
1267 | CIFS_I(direntry->d_inode)->write_behind_rc = wbrc; | |
1da177e4 LT |
1268 | } |
1269 | if (invalidate_inode) { | |
3abb9272 SF |
1270 | /* shrink_dcache not necessary now that cifs dentry ops |
1271 | are exported for negative dentries */ | |
fb8c4b14 | 1272 | /* if (S_ISDIR(direntry->d_inode->i_mode)) |
3abb9272 SF |
1273 | shrink_dcache_parent(direntry); */ |
1274 | if (S_ISREG(direntry->d_inode->i_mode)) { | |
1275 | if (direntry->d_inode->i_mapping) | |
cea21805 JL |
1276 | wbrc = filemap_fdatawait(direntry->d_inode->i_mapping); |
1277 | if (wbrc) | |
1278 | CIFS_I(direntry->d_inode)->write_behind_rc = wbrc; | |
3abb9272 SF |
1279 | /* may eventually have to do this for open files too */ |
1280 | if (list_empty(&(cifsInode->openFileList))) { | |
1281 | /* changed on server - flush read ahead pages */ | |
1282 | cFYI(1, ("Invalidating read ahead data on " | |
1283 | "closed file")); | |
1284 | invalidate_remote_inode(direntry->d_inode); | |
1285 | } | |
1da177e4 LT |
1286 | } |
1287 | } | |
1b1dcc1b | 1288 | /* mutex_unlock(&direntry->d_inode->i_mutex); */ |
50c2f753 | 1289 | |
1da177e4 LT |
1290 | kfree(full_path); |
1291 | FreeXid(xid); | |
1292 | return rc; | |
1293 | } | |
1294 | ||
1295 | int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
1296 | struct kstat *stat) | |
1297 | { | |
1298 | int err = cifs_revalidate(dentry); | |
5fe14c85 | 1299 | if (!err) { |
1da177e4 | 1300 | generic_fillattr(dentry->d_inode, stat); |
5fe14c85 SF |
1301 | stat->blksize = CIFS_MAX_MSGSIZE; |
1302 | } | |
1da177e4 LT |
1303 | return err; |
1304 | } | |
1305 | ||
1306 | static int cifs_truncate_page(struct address_space *mapping, loff_t from) | |
1307 | { | |
1308 | pgoff_t index = from >> PAGE_CACHE_SHIFT; | |
1309 | unsigned offset = from & (PAGE_CACHE_SIZE - 1); | |
1310 | struct page *page; | |
1da177e4 LT |
1311 | int rc = 0; |
1312 | ||
1313 | page = grab_cache_page(mapping, index); | |
1314 | if (!page) | |
1315 | return -ENOMEM; | |
1316 | ||
eebd2aa3 | 1317 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); |
1da177e4 LT |
1318 | unlock_page(page); |
1319 | page_cache_release(page); | |
1320 | return rc; | |
1321 | } | |
1322 | ||
fb8c4b14 | 1323 | static int cifs_vmtruncate(struct inode *inode, loff_t offset) |
3677db10 SF |
1324 | { |
1325 | struct address_space *mapping = inode->i_mapping; | |
1326 | unsigned long limit; | |
1327 | ||
ba6a46a0 | 1328 | spin_lock(&inode->i_lock); |
3677db10 SF |
1329 | if (inode->i_size < offset) |
1330 | goto do_expand; | |
1331 | /* | |
1332 | * truncation of in-use swapfiles is disallowed - it would cause | |
1333 | * subsequent swapout to scribble on the now-freed blocks. | |
1334 | */ | |
ba6a46a0 SF |
1335 | if (IS_SWAPFILE(inode)) { |
1336 | spin_unlock(&inode->i_lock); | |
3677db10 | 1337 | goto out_busy; |
ba6a46a0 | 1338 | } |
3677db10 SF |
1339 | i_size_write(inode, offset); |
1340 | spin_unlock(&inode->i_lock); | |
8064ab4d SF |
1341 | /* |
1342 | * unmap_mapping_range is called twice, first simply for efficiency | |
1343 | * so that truncate_inode_pages does fewer single-page unmaps. However | |
1344 | * after this first call, and before truncate_inode_pages finishes, | |
1345 | * it is possible for private pages to be COWed, which remain after | |
1346 | * truncate_inode_pages finishes, hence the second unmap_mapping_range | |
1347 | * call must be made for correctness. | |
1348 | */ | |
3677db10 SF |
1349 | unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1); |
1350 | truncate_inode_pages(mapping, offset); | |
8064ab4d | 1351 | unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1); |
3677db10 SF |
1352 | goto out_truncate; |
1353 | ||
1354 | do_expand: | |
1355 | limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur; | |
ba6a46a0 SF |
1356 | if (limit != RLIM_INFINITY && offset > limit) { |
1357 | spin_unlock(&inode->i_lock); | |
3677db10 | 1358 | goto out_sig; |
ba6a46a0 SF |
1359 | } |
1360 | if (offset > inode->i_sb->s_maxbytes) { | |
1361 | spin_unlock(&inode->i_lock); | |
3677db10 | 1362 | goto out_big; |
ba6a46a0 | 1363 | } |
3677db10 | 1364 | i_size_write(inode, offset); |
ba6a46a0 | 1365 | spin_unlock(&inode->i_lock); |
3677db10 SF |
1366 | out_truncate: |
1367 | if (inode->i_op && inode->i_op->truncate) | |
1368 | inode->i_op->truncate(inode); | |
1369 | return 0; | |
1370 | out_sig: | |
1371 | send_sig(SIGXFSZ, current, 0); | |
1372 | out_big: | |
1373 | return -EFBIG; | |
1374 | out_busy: | |
1375 | return -ETXTBSY; | |
1376 | } | |
1377 | ||
1da177e4 LT |
1378 | int cifs_setattr(struct dentry *direntry, struct iattr *attrs) |
1379 | { | |
1380 | int xid; | |
1381 | struct cifs_sb_info *cifs_sb; | |
1382 | struct cifsTconInfo *pTcon; | |
1383 | char *full_path = NULL; | |
1384 | int rc = -EACCES; | |
1da177e4 LT |
1385 | struct cifsFileInfo *open_file = NULL; |
1386 | FILE_BASIC_INFO time_buf; | |
1387 | int set_time = FALSE; | |
066fcb06 | 1388 | int set_dosattr = FALSE; |
1da177e4 LT |
1389 | __u64 mode = 0xFFFFFFFFFFFFFFFFULL; |
1390 | __u64 uid = 0xFFFFFFFFFFFFFFFFULL; | |
1391 | __u64 gid = 0xFFFFFFFFFFFFFFFFULL; | |
1392 | struct cifsInodeInfo *cifsInode; | |
1da177e4 LT |
1393 | |
1394 | xid = GetXid(); | |
1395 | ||
3979877e | 1396 | cFYI(1, ("setattr on file %s attrs->iavalid 0x%x", |
1da177e4 | 1397 | direntry->d_name.name, attrs->ia_valid)); |
6473a559 | 1398 | |
1da177e4 LT |
1399 | cifs_sb = CIFS_SB(direntry->d_inode->i_sb); |
1400 | pTcon = cifs_sb->tcon; | |
1401 | ||
2a138ebb | 1402 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) { |
6473a559 SF |
1403 | /* check if we have permission to change attrs */ |
1404 | rc = inode_change_ok(direntry->d_inode, attrs); | |
fb8c4b14 | 1405 | if (rc < 0) { |
6473a559 SF |
1406 | FreeXid(xid); |
1407 | return rc; | |
1408 | } else | |
1409 | rc = 0; | |
1410 | } | |
50c2f753 | 1411 | |
7f57356b | 1412 | full_path = build_path_from_dentry(direntry); |
1da177e4 LT |
1413 | if (full_path == NULL) { |
1414 | FreeXid(xid); | |
1415 | return -ENOMEM; | |
1416 | } | |
1417 | cifsInode = CIFS_I(direntry->d_inode); | |
1418 | ||
1419 | /* BB check if we need to refresh inode from server now ? BB */ | |
1420 | ||
1da177e4 | 1421 | if (attrs->ia_valid & ATTR_SIZE) { |
cea21805 JL |
1422 | /* |
1423 | Flush data before changing file size on server. If the | |
1424 | flush returns error, store it to report later and continue. | |
1425 | BB: This should be smarter. Why bother flushing pages that | |
1426 | will be truncated anyway? Also, should we error out here if | |
1427 | the flush returns error? | |
1428 | */ | |
1429 | rc = filemap_write_and_wait(direntry->d_inode->i_mapping); | |
1430 | if (rc != 0) { | |
1431 | CIFS_I(direntry->d_inode)->write_behind_rc = rc; | |
1432 | rc = 0; | |
1433 | } | |
1434 | ||
1da177e4 LT |
1435 | /* To avoid spurious oplock breaks from server, in the case of |
1436 | inodes that we already have open, avoid doing path based | |
1437 | setting of file size if we can do it by handle. | |
1438 | This keeps our caching token (oplock) and avoids timeouts | |
1439 | when the local oplock break takes longer to flush | |
1440 | writebehind data than the SMB timeout for the SetPathInfo | |
1441 | request would allow */ | |
3979877e | 1442 | |
6148a742 SF |
1443 | open_file = find_writable_file(cifsInode); |
1444 | if (open_file) { | |
1445 | __u16 nfid = open_file->netfid; | |
1446 | __u32 npid = open_file->pid; | |
1447 | rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size, | |
1448 | nfid, npid, FALSE); | |
23e7dd7d | 1449 | atomic_dec(&open_file->wrtPending); |
fb8c4b14 SF |
1450 | cFYI(1, ("SetFSize for attrs rc = %d", rc)); |
1451 | if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { | |
77159b4d | 1452 | unsigned int bytes_written; |
6148a742 SF |
1453 | rc = CIFSSMBWrite(xid, pTcon, |
1454 | nfid, 0, attrs->ia_size, | |
1455 | &bytes_written, NULL, NULL, | |
1456 | 1 /* 45 seconds */); | |
fb8c4b14 | 1457 | cFYI(1, ("Wrt seteof rc %d", rc)); |
1da177e4 | 1458 | } |
fb8c4b14 | 1459 | } else |
6473a559 SF |
1460 | rc = -EINVAL; |
1461 | ||
1da177e4 LT |
1462 | if (rc != 0) { |
1463 | /* Set file size by pathname rather than by handle | |
1464 | either because no valid, writeable file handle for | |
1465 | it was found or because there was an error setting | |
1466 | it by handle */ | |
1467 | rc = CIFSSMBSetEOF(xid, pTcon, full_path, | |
1468 | attrs->ia_size, FALSE, | |
fb8c4b14 | 1469 | cifs_sb->local_nls, |
737b758c SF |
1470 | cifs_sb->mnt_cifs_flags & |
1471 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
e30dcf3a | 1472 | cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc)); |
fb8c4b14 | 1473 | if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { |
e30dcf3a SF |
1474 | __u16 netfid; |
1475 | int oplock = FALSE; | |
1476 | ||
1477 | rc = SMBLegacyOpen(xid, pTcon, full_path, | |
1478 | FILE_OPEN, | |
1479 | SYNCHRONIZE | FILE_WRITE_ATTRIBUTES, | |
1480 | CREATE_NOT_DIR, &netfid, &oplock, | |
1481 | NULL, cifs_sb->local_nls, | |
1482 | cifs_sb->mnt_cifs_flags & | |
1483 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
fb8c4b14 | 1484 | if (rc == 0) { |
77159b4d | 1485 | unsigned int bytes_written; |
e30dcf3a SF |
1486 | rc = CIFSSMBWrite(xid, pTcon, |
1487 | netfid, 0, | |
1488 | attrs->ia_size, | |
1489 | &bytes_written, NULL, | |
1490 | NULL, 1 /* 45 sec */); | |
fb8c4b14 | 1491 | cFYI(1, ("wrt seteof rc %d", rc)); |
e30dcf3a SF |
1492 | CIFSSMBClose(xid, pTcon, netfid); |
1493 | } | |
1494 | ||
1495 | } | |
1da177e4 LT |
1496 | } |
1497 | ||
1498 | /* Server is ok setting allocation size implicitly - no need | |
1499 | to call: | |
1500 | CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE, | |
1501 | cifs_sb->local_nls); | |
1502 | */ | |
1503 | ||
1504 | if (rc == 0) { | |
3677db10 | 1505 | rc = cifs_vmtruncate(direntry->d_inode, attrs->ia_size); |
1da177e4 LT |
1506 | cifs_truncate_page(direntry->d_inode->i_mapping, |
1507 | direntry->d_inode->i_size); | |
fb8c4b14 | 1508 | } else |
e30dcf3a | 1509 | goto cifs_setattr_exit; |
1da177e4 LT |
1510 | } |
1511 | if (attrs->ia_valid & ATTR_UID) { | |
e30dcf3a | 1512 | cFYI(1, ("UID changed to %d", attrs->ia_uid)); |
1da177e4 | 1513 | uid = attrs->ia_uid; |
1da177e4 LT |
1514 | } |
1515 | if (attrs->ia_valid & ATTR_GID) { | |
e30dcf3a | 1516 | cFYI(1, ("GID changed to %d", attrs->ia_gid)); |
1da177e4 | 1517 | gid = attrs->ia_gid; |
1da177e4 LT |
1518 | } |
1519 | ||
1520 | time_buf.Attributes = 0; | |
d32c4f26 JL |
1521 | |
1522 | /* skip mode change if it's just for clearing setuid/setgid */ | |
1523 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) | |
1524 | attrs->ia_valid &= ~ATTR_MODE; | |
1525 | ||
1da177e4 | 1526 | if (attrs->ia_valid & ATTR_MODE) { |
e30dcf3a | 1527 | cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode)); |
1da177e4 | 1528 | mode = attrs->ia_mode; |
1da177e4 LT |
1529 | } |
1530 | ||
c18c842b | 1531 | if ((pTcon->unix_ext) |
1da177e4 LT |
1532 | && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID))) |
1533 | rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid, | |
737b758c | 1534 | 0 /* dev_t */, cifs_sb->local_nls, |
fb8c4b14 | 1535 | cifs_sb->mnt_cifs_flags & |
737b758c | 1536 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1da177e4 | 1537 | else if (attrs->ia_valid & ATTR_MODE) { |
cdbce9c8 | 1538 | rc = 0; |
97837582 SF |
1539 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
1540 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) | |
1541 | rc = mode_to_acl(direntry->d_inode, full_path, mode); | |
f6d09982 | 1542 | else if ((mode & S_IWUGO) == 0) { |
97837582 | 1543 | #else |
f6d09982 | 1544 | if ((mode & S_IWUGO) == 0) { |
97837582 | 1545 | #endif |
f6d09982 | 1546 | /* not writeable */ |
066fcb06 SF |
1547 | if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0) { |
1548 | set_dosattr = TRUE; | |
1da177e4 LT |
1549 | time_buf.Attributes = |
1550 | cpu_to_le32(cifsInode->cifsAttrs | | |
1551 | ATTR_READONLY); | |
066fcb06 | 1552 | } |
5268df2e SF |
1553 | } else if (cifsInode->cifsAttrs & ATTR_READONLY) { |
1554 | /* If file is readonly on server, we would | |
1555 | not be able to write to it - so if any write | |
1556 | bit is enabled for user or group or other we | |
1557 | need to at least try to remove r/o dos attr */ | |
1558 | set_dosattr = TRUE; | |
1559 | time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs & | |
1560 | (~ATTR_READONLY)); | |
1561 | /* Windows ignores set to zero */ | |
fb8c4b14 | 1562 | if (time_buf.Attributes == 0) |
5268df2e | 1563 | time_buf.Attributes |= cpu_to_le32(ATTR_NORMAL); |
1da177e4 | 1564 | } |
97837582 SF |
1565 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
1566 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) | |
1567 | mode_to_acl(direntry->d_inode, full_path, mode); | |
1568 | #endif | |
1da177e4 LT |
1569 | } |
1570 | ||
1571 | if (attrs->ia_valid & ATTR_ATIME) { | |
1572 | set_time = TRUE; | |
1573 | time_buf.LastAccessTime = | |
1574 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime)); | |
1575 | } else | |
1576 | time_buf.LastAccessTime = 0; | |
1577 | ||
1578 | if (attrs->ia_valid & ATTR_MTIME) { | |
1579 | set_time = TRUE; | |
1580 | time_buf.LastWriteTime = | |
1581 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime)); | |
1582 | } else | |
1583 | time_buf.LastWriteTime = 0; | |
e30dcf3a SF |
1584 | /* Do not set ctime explicitly unless other time |
1585 | stamps are changed explicitly (i.e. by utime() | |
1586 | since we would then have a mix of client and | |
1587 | server times */ | |
50c2f753 | 1588 | |
e30dcf3a | 1589 | if (set_time && (attrs->ia_valid & ATTR_CTIME)) { |
1da177e4 | 1590 | set_time = TRUE; |
e30dcf3a SF |
1591 | /* Although Samba throws this field away |
1592 | it may be useful to Windows - but we do | |
1593 | not want to set ctime unless some other | |
1594 | timestamp is changing */ | |
26a21b98 | 1595 | cFYI(1, ("CIFS - CTIME changed")); |
1da177e4 LT |
1596 | time_buf.ChangeTime = |
1597 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime)); | |
1598 | } else | |
1599 | time_buf.ChangeTime = 0; | |
1600 | ||
066fcb06 | 1601 | if (set_time || set_dosattr) { |
1da177e4 LT |
1602 | time_buf.CreationTime = 0; /* do not change */ |
1603 | /* In the future we should experiment - try setting timestamps | |
1604 | via Handle (SetFileInfo) instead of by path */ | |
1605 | if (!(pTcon->ses->flags & CIFS_SES_NT4)) | |
1606 | rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf, | |
737b758c SF |
1607 | cifs_sb->local_nls, |
1608 | cifs_sb->mnt_cifs_flags & | |
1609 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
1610 | else |
1611 | rc = -EOPNOTSUPP; | |
1612 | ||
1613 | if (rc == -EOPNOTSUPP) { | |
1614 | int oplock = FALSE; | |
1615 | __u16 netfid; | |
1616 | ||
1617 | cFYI(1, ("calling SetFileInfo since SetPathInfo for " | |
1618 | "times not supported by this server")); | |
1619 | /* BB we could scan to see if we already have it open | |
1620 | and pass in pid of opener to function */ | |
1621 | rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, | |
1622 | SYNCHRONIZE | FILE_WRITE_ATTRIBUTES, | |
1623 | CREATE_NOT_DIR, &netfid, &oplock, | |
737b758c SF |
1624 | NULL, cifs_sb->local_nls, |
1625 | cifs_sb->mnt_cifs_flags & | |
1626 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
fb8c4b14 | 1627 | if (rc == 0) { |
1da177e4 LT |
1628 | rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf, |
1629 | netfid); | |
1630 | CIFSSMBClose(xid, pTcon, netfid); | |
1631 | } else { | |
1632 | /* BB For even older servers we could convert time_buf | |
1633 | into old DOS style which uses two second | |
1634 | granularity */ | |
1635 | ||
1636 | /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path, | |
fb8c4b14 | 1637 | &time_buf, cifs_sb->local_nls); */ |
1da177e4 LT |
1638 | } |
1639 | } | |
e30dcf3a SF |
1640 | /* Even if error on time set, no sense failing the call if |
1641 | the server would set the time to a reasonable value anyway, | |
1642 | and this check ensures that we are not being called from | |
1643 | sys_utimes in which case we ought to fail the call back to | |
1644 | the user when the server rejects the call */ | |
fb8c4b14 | 1645 | if ((rc) && (attrs->ia_valid & |
e30dcf3a SF |
1646 | (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE))) |
1647 | rc = 0; | |
1da177e4 LT |
1648 | } |
1649 | ||
1650 | /* do not need local check to inode_check_ok since the server does | |
1651 | that */ | |
1652 | if (!rc) | |
1653 | rc = inode_setattr(direntry->d_inode, attrs); | |
e30dcf3a | 1654 | cifs_setattr_exit: |
1da177e4 LT |
1655 | kfree(full_path); |
1656 | FreeXid(xid); | |
1657 | return rc; | |
1658 | } | |
1659 | ||
99ee4dbd | 1660 | #if 0 |
1da177e4 LT |
1661 | void cifs_delete_inode(struct inode *inode) |
1662 | { | |
26a21b98 | 1663 | cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode)); |
1da177e4 LT |
1664 | /* may have to add back in if and when safe distributed caching of |
1665 | directories added e.g. via FindNotify */ | |
1666 | } | |
99ee4dbd | 1667 | #endif |