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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/cifs/inode.c | |
3 | * | |
8be0ed44 | 4 | * Copyright (C) International Business Machines Corp., 2002,2008 |
1da177e4 LT |
5 | * Author(s): Steve French (sfrench@us.ibm.com) |
6 | * | |
7 | * This library is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU Lesser General Public License as published | |
9 | * by the Free Software Foundation; either version 2.1 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This library is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
15 | * the GNU Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public License | |
18 | * along with this library; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
21 | #include <linux/fs.h> | |
1da177e4 LT |
22 | #include <linux/stat.h> |
23 | #include <linux/pagemap.h> | |
24 | #include <asm/div64.h> | |
25 | #include "cifsfs.h" | |
26 | #include "cifspdu.h" | |
27 | #include "cifsglob.h" | |
28 | #include "cifsproto.h" | |
29 | #include "cifs_debug.h" | |
30 | #include "cifs_fs_sb.h" | |
31 | ||
70eff55d | 32 | |
7962670e | 33 | static void cifs_set_ops(struct inode *inode, const bool is_dfs_referral) |
70eff55d CH |
34 | { |
35 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
36 | ||
37 | switch (inode->i_mode & S_IFMT) { | |
38 | case S_IFREG: | |
39 | inode->i_op = &cifs_file_inode_ops; | |
40 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { | |
41 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
42 | inode->i_fop = &cifs_file_direct_nobrl_ops; | |
43 | else | |
44 | inode->i_fop = &cifs_file_direct_ops; | |
45 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
46 | inode->i_fop = &cifs_file_nobrl_ops; | |
47 | else { /* not direct, send byte range locks */ | |
48 | inode->i_fop = &cifs_file_ops; | |
49 | } | |
50 | ||
51 | ||
52 | /* check if server can support readpages */ | |
53 | if (cifs_sb->tcon->ses->server->maxBuf < | |
54 | PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE) | |
55 | inode->i_data.a_ops = &cifs_addr_ops_smallbuf; | |
56 | else | |
57 | inode->i_data.a_ops = &cifs_addr_ops; | |
58 | break; | |
59 | case S_IFDIR: | |
bc5b6e24 | 60 | #ifdef CONFIG_CIFS_DFS_UPCALL |
7962670e IM |
61 | if (is_dfs_referral) { |
62 | inode->i_op = &cifs_dfs_referral_inode_operations; | |
63 | } else { | |
bc5b6e24 SF |
64 | #else /* NO DFS support, treat as a directory */ |
65 | { | |
66 | #endif | |
7962670e IM |
67 | inode->i_op = &cifs_dir_inode_ops; |
68 | inode->i_fop = &cifs_dir_ops; | |
69 | } | |
70eff55d CH |
70 | break; |
71 | case S_IFLNK: | |
72 | inode->i_op = &cifs_symlink_inode_ops; | |
73 | break; | |
74 | default: | |
75 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
76 | break; | |
77 | } | |
78 | } | |
79 | ||
cc0bad75 JL |
80 | /* populate an inode with info from a cifs_fattr struct */ |
81 | void | |
82 | cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr) | |
75f12983 | 83 | { |
cc0bad75 | 84 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
0b8f18e3 JL |
85 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
86 | unsigned long oldtime = cifs_i->time; | |
cc0bad75 JL |
87 | |
88 | inode->i_atime = fattr->cf_atime; | |
89 | inode->i_mtime = fattr->cf_mtime; | |
90 | inode->i_ctime = fattr->cf_ctime; | |
cc0bad75 JL |
91 | inode->i_rdev = fattr->cf_rdev; |
92 | inode->i_nlink = fattr->cf_nlink; | |
93 | inode->i_uid = fattr->cf_uid; | |
94 | inode->i_gid = fattr->cf_gid; | |
95 | ||
0b8f18e3 JL |
96 | /* if dynperm is set, don't clobber existing mode */ |
97 | if (inode->i_state & I_NEW || | |
98 | !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) | |
99 | inode->i_mode = fattr->cf_mode; | |
100 | ||
cc0bad75 JL |
101 | cifs_i->cifsAttrs = fattr->cf_cifsattrs; |
102 | cifs_i->uniqueid = fattr->cf_uniqueid; | |
75f12983 | 103 | |
0b8f18e3 JL |
104 | if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL) |
105 | cifs_i->time = 0; | |
106 | else | |
107 | cifs_i->time = jiffies; | |
108 | ||
cc0bad75 | 109 | cFYI(1, ("inode 0x%p old_time=%ld new_time=%ld", inode, |
0b8f18e3 JL |
110 | oldtime, cifs_i->time)); |
111 | ||
112 | cifs_i->delete_pending = fattr->cf_flags & CIFS_FATTR_DELETE_PENDING; | |
cc0bad75 | 113 | |
835a36ca | 114 | cifs_i->server_eof = fattr->cf_eof; |
cc0bad75 JL |
115 | /* |
116 | * Can't safely change the file size here if the client is writing to | |
117 | * it due to potential races. | |
118 | */ | |
119 | spin_lock(&inode->i_lock); | |
120 | if (is_size_safe_to_change(cifs_i, fattr->cf_eof)) { | |
121 | i_size_write(inode, fattr->cf_eof); | |
122 | ||
123 | /* | |
124 | * i_blocks is not related to (i_size / i_blksize), | |
125 | * but instead 512 byte (2**9) size is required for | |
126 | * calculating num blocks. | |
127 | */ | |
128 | inode->i_blocks = (512 - 1 + fattr->cf_bytes) >> 9; | |
129 | } | |
130 | spin_unlock(&inode->i_lock); | |
131 | ||
132 | cifs_set_ops(inode, fattr->cf_flags & CIFS_FATTR_DFS_REFERRAL); | |
133 | } | |
134 | ||
135 | /* Fill a cifs_fattr struct with info from FILE_UNIX_BASIC_INFO. */ | |
136 | void | |
137 | cifs_unix_basic_to_fattr(struct cifs_fattr *fattr, FILE_UNIX_BASIC_INFO *info, | |
138 | struct cifs_sb_info *cifs_sb) | |
139 | { | |
140 | memset(fattr, 0, sizeof(*fattr)); | |
141 | fattr->cf_uniqueid = le64_to_cpu(info->UniqueId); | |
142 | fattr->cf_bytes = le64_to_cpu(info->NumOfBytes); | |
143 | fattr->cf_eof = le64_to_cpu(info->EndOfFile); | |
144 | ||
145 | fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); | |
146 | fattr->cf_mtime = cifs_NTtimeToUnix(info->LastModificationTime); | |
147 | fattr->cf_ctime = cifs_NTtimeToUnix(info->LastStatusChange); | |
148 | fattr->cf_mode = le64_to_cpu(info->Permissions); | |
75f12983 CH |
149 | |
150 | /* | |
151 | * Since we set the inode type below we need to mask off | |
152 | * to avoid strange results if bits set above. | |
153 | */ | |
cc0bad75 | 154 | fattr->cf_mode &= ~S_IFMT; |
75f12983 CH |
155 | switch (le32_to_cpu(info->Type)) { |
156 | case UNIX_FILE: | |
cc0bad75 JL |
157 | fattr->cf_mode |= S_IFREG; |
158 | fattr->cf_dtype = DT_REG; | |
75f12983 CH |
159 | break; |
160 | case UNIX_SYMLINK: | |
cc0bad75 JL |
161 | fattr->cf_mode |= S_IFLNK; |
162 | fattr->cf_dtype = DT_LNK; | |
75f12983 CH |
163 | break; |
164 | case UNIX_DIR: | |
cc0bad75 JL |
165 | fattr->cf_mode |= S_IFDIR; |
166 | fattr->cf_dtype = DT_DIR; | |
75f12983 CH |
167 | break; |
168 | case UNIX_CHARDEV: | |
cc0bad75 JL |
169 | fattr->cf_mode |= S_IFCHR; |
170 | fattr->cf_dtype = DT_CHR; | |
171 | fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor), | |
172 | le64_to_cpu(info->DevMinor) & MINORMASK); | |
75f12983 CH |
173 | break; |
174 | case UNIX_BLOCKDEV: | |
cc0bad75 JL |
175 | fattr->cf_mode |= S_IFBLK; |
176 | fattr->cf_dtype = DT_BLK; | |
177 | fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor), | |
178 | le64_to_cpu(info->DevMinor) & MINORMASK); | |
75f12983 CH |
179 | break; |
180 | case UNIX_FIFO: | |
cc0bad75 JL |
181 | fattr->cf_mode |= S_IFIFO; |
182 | fattr->cf_dtype = DT_FIFO; | |
75f12983 CH |
183 | break; |
184 | case UNIX_SOCKET: | |
cc0bad75 JL |
185 | fattr->cf_mode |= S_IFSOCK; |
186 | fattr->cf_dtype = DT_SOCK; | |
75f12983 CH |
187 | break; |
188 | default: | |
189 | /* safest to call it a file if we do not know */ | |
cc0bad75 JL |
190 | fattr->cf_mode |= S_IFREG; |
191 | fattr->cf_dtype = DT_REG; | |
75f12983 CH |
192 | cFYI(1, ("unknown type %d", le32_to_cpu(info->Type))); |
193 | break; | |
194 | } | |
195 | ||
cc0bad75 JL |
196 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) |
197 | fattr->cf_uid = cifs_sb->mnt_uid; | |
75f12983 | 198 | else |
cc0bad75 | 199 | fattr->cf_uid = le64_to_cpu(info->Uid); |
75f12983 | 200 | |
cc0bad75 JL |
201 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) |
202 | fattr->cf_gid = cifs_sb->mnt_gid; | |
75f12983 | 203 | else |
cc0bad75 | 204 | fattr->cf_gid = le64_to_cpu(info->Gid); |
75f12983 | 205 | |
cc0bad75 | 206 | fattr->cf_nlink = le64_to_cpu(info->Nlinks); |
75f12983 CH |
207 | } |
208 | ||
b9a3260f | 209 | /* |
cc0bad75 JL |
210 | * Fill a cifs_fattr struct with fake inode info. |
211 | * | |
212 | * Needed to setup cifs_fattr data for the directory which is the | |
213 | * junction to the new submount (ie to setup the fake directory | |
214 | * which represents a DFS referral). | |
b9a3260f | 215 | */ |
f1230c97 | 216 | static void |
cc0bad75 | 217 | cifs_create_dfs_fattr(struct cifs_fattr *fattr, struct super_block *sb) |
0e4bbde9 | 218 | { |
cc0bad75 | 219 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
0e4bbde9 | 220 | |
cc0bad75 JL |
221 | cFYI(1, ("creating fake fattr for DFS referral")); |
222 | ||
223 | memset(fattr, 0, sizeof(*fattr)); | |
224 | fattr->cf_mode = S_IFDIR | S_IXUGO | S_IRWXU; | |
225 | fattr->cf_uid = cifs_sb->mnt_uid; | |
226 | fattr->cf_gid = cifs_sb->mnt_gid; | |
227 | fattr->cf_atime = CURRENT_TIME; | |
228 | fattr->cf_ctime = CURRENT_TIME; | |
229 | fattr->cf_mtime = CURRENT_TIME; | |
230 | fattr->cf_nlink = 2; | |
231 | fattr->cf_flags |= CIFS_FATTR_DFS_REFERRAL; | |
0e4bbde9 SF |
232 | } |
233 | ||
1da177e4 | 234 | int cifs_get_inode_info_unix(struct inode **pinode, |
cc0bad75 JL |
235 | const unsigned char *full_path, |
236 | struct super_block *sb, int xid) | |
1da177e4 | 237 | { |
cc0bad75 | 238 | int rc; |
0e4bbde9 | 239 | FILE_UNIX_BASIC_INFO find_data; |
cc0bad75 JL |
240 | struct cifs_fattr fattr; |
241 | struct cifsTconInfo *tcon; | |
1da177e4 | 242 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
1da177e4 | 243 | |
cc0bad75 | 244 | tcon = cifs_sb->tcon; |
646dd539 | 245 | cFYI(1, ("Getting info on %s", full_path)); |
7962670e | 246 | |
1da177e4 | 247 | /* could have done a find first instead but this returns more info */ |
cc0bad75 | 248 | rc = CIFSSMBUnixQPathInfo(xid, tcon, full_path, &find_data, |
737b758c SF |
249 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
250 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
e911d0cc | 251 | |
cc0bad75 JL |
252 | if (!rc) { |
253 | cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb); | |
254 | } else if (rc == -EREMOTE) { | |
255 | cifs_create_dfs_fattr(&fattr, sb); | |
256 | rc = 0; | |
257 | } else { | |
258 | return rc; | |
259 | } | |
1da177e4 | 260 | |
0e4bbde9 | 261 | if (*pinode == NULL) { |
cc0bad75 JL |
262 | /* get new inode */ |
263 | *pinode = cifs_iget(sb, &fattr); | |
264 | if (!*pinode) | |
0e4bbde9 | 265 | rc = -ENOMEM; |
cc0bad75 JL |
266 | } else { |
267 | /* we already have inode, update it */ | |
268 | cifs_fattr_to_inode(*pinode, &fattr); | |
0e4bbde9 | 269 | } |
1da177e4 | 270 | |
1da177e4 LT |
271 | return rc; |
272 | } | |
273 | ||
0b8f18e3 JL |
274 | static int |
275 | cifs_sfu_type(struct cifs_fattr *fattr, const unsigned char *path, | |
276 | struct cifs_sb_info *cifs_sb, int xid) | |
d6e2f2a4 SF |
277 | { |
278 | int rc; | |
4b18f2a9 | 279 | int oplock = 0; |
d6e2f2a4 SF |
280 | __u16 netfid; |
281 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
86c96b4b | 282 | char buf[24]; |
d6e2f2a4 | 283 | unsigned int bytes_read; |
fb8c4b14 | 284 | char *pbuf; |
d6e2f2a4 SF |
285 | |
286 | pbuf = buf; | |
287 | ||
0b8f18e3 JL |
288 | fattr->cf_mode &= ~S_IFMT; |
289 | ||
290 | if (fattr->cf_eof == 0) { | |
291 | fattr->cf_mode |= S_IFIFO; | |
292 | fattr->cf_dtype = DT_FIFO; | |
d6e2f2a4 | 293 | return 0; |
0b8f18e3 JL |
294 | } else if (fattr->cf_eof < 8) { |
295 | fattr->cf_mode |= S_IFREG; | |
296 | fattr->cf_dtype = DT_REG; | |
d6e2f2a4 SF |
297 | return -EINVAL; /* EOPNOTSUPP? */ |
298 | } | |
50c2f753 | 299 | |
d6e2f2a4 SF |
300 | rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ, |
301 | CREATE_NOT_DIR, &netfid, &oplock, NULL, | |
302 | cifs_sb->local_nls, | |
303 | cifs_sb->mnt_cifs_flags & | |
304 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
fb8c4b14 | 305 | if (rc == 0) { |
ec637e3f | 306 | int buf_type = CIFS_NO_BUFFER; |
d6e2f2a4 | 307 | /* Read header */ |
0b8f18e3 | 308 | rc = CIFSSMBRead(xid, pTcon, netfid, |
86c96b4b | 309 | 24 /* length */, 0 /* offset */, |
ec637e3f | 310 | &bytes_read, &pbuf, &buf_type); |
4523cc30 SF |
311 | if ((rc == 0) && (bytes_read >= 8)) { |
312 | if (memcmp("IntxBLK", pbuf, 8) == 0) { | |
fb8c4b14 | 313 | cFYI(1, ("Block device")); |
0b8f18e3 JL |
314 | fattr->cf_mode |= S_IFBLK; |
315 | fattr->cf_dtype = DT_BLK; | |
4523cc30 | 316 | if (bytes_read == 24) { |
86c96b4b SF |
317 | /* we have enough to decode dev num */ |
318 | __u64 mjr; /* major */ | |
319 | __u64 mnr; /* minor */ | |
320 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); | |
321 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); | |
0b8f18e3 | 322 | fattr->cf_rdev = MKDEV(mjr, mnr); |
86c96b4b | 323 | } |
4523cc30 | 324 | } else if (memcmp("IntxCHR", pbuf, 8) == 0) { |
fb8c4b14 | 325 | cFYI(1, ("Char device")); |
0b8f18e3 JL |
326 | fattr->cf_mode |= S_IFCHR; |
327 | fattr->cf_dtype = DT_CHR; | |
4523cc30 | 328 | if (bytes_read == 24) { |
86c96b4b SF |
329 | /* we have enough to decode dev num */ |
330 | __u64 mjr; /* major */ | |
331 | __u64 mnr; /* minor */ | |
332 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); | |
333 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); | |
0b8f18e3 | 334 | fattr->cf_rdev = MKDEV(mjr, mnr); |
fb8c4b14 | 335 | } |
4523cc30 | 336 | } else if (memcmp("IntxLNK", pbuf, 7) == 0) { |
fb8c4b14 | 337 | cFYI(1, ("Symlink")); |
0b8f18e3 JL |
338 | fattr->cf_mode |= S_IFLNK; |
339 | fattr->cf_dtype = DT_LNK; | |
86c96b4b | 340 | } else { |
0b8f18e3 JL |
341 | fattr->cf_mode |= S_IFREG; /* file? */ |
342 | fattr->cf_dtype = DT_REG; | |
fb8c4b14 | 343 | rc = -EOPNOTSUPP; |
86c96b4b | 344 | } |
3020a1f5 | 345 | } else { |
0b8f18e3 JL |
346 | fattr->cf_mode |= S_IFREG; /* then it is a file */ |
347 | fattr->cf_dtype = DT_REG; | |
fb8c4b14 SF |
348 | rc = -EOPNOTSUPP; /* or some unknown SFU type */ |
349 | } | |
d6e2f2a4 | 350 | CIFSSMBClose(xid, pTcon, netfid); |
d6e2f2a4 SF |
351 | } |
352 | return rc; | |
d6e2f2a4 SF |
353 | } |
354 | ||
9e294f1c SF |
355 | #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */ |
356 | ||
0b8f18e3 JL |
357 | /* |
358 | * Fetch mode bits as provided by SFU. | |
359 | * | |
360 | * FIXME: Doesn't this clobber the type bit we got from cifs_sfu_type ? | |
361 | */ | |
362 | static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path, | |
363 | struct cifs_sb_info *cifs_sb, int xid) | |
9e294f1c | 364 | { |
3020a1f5 | 365 | #ifdef CONFIG_CIFS_XATTR |
9e294f1c SF |
366 | ssize_t rc; |
367 | char ea_value[4]; | |
368 | __u32 mode; | |
369 | ||
31c0519f | 370 | rc = CIFSSMBQAllEAs(xid, cifs_sb->tcon, path, "SETFILEBITS", |
0b8f18e3 JL |
371 | ea_value, 4 /* size of buf */, cifs_sb->local_nls, |
372 | cifs_sb->mnt_cifs_flags & | |
373 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
4523cc30 | 374 | if (rc < 0) |
9e294f1c SF |
375 | return (int)rc; |
376 | else if (rc > 3) { | |
377 | mode = le32_to_cpu(*((__le32 *)ea_value)); | |
0b8f18e3 JL |
378 | fattr->cf_mode &= ~SFBITS_MASK; |
379 | cFYI(1, ("special bits 0%o org mode 0%o", mode, | |
380 | fattr->cf_mode)); | |
381 | fattr->cf_mode = (mode & SFBITS_MASK) | fattr->cf_mode; | |
fb8c4b14 | 382 | cFYI(1, ("special mode bits 0%o", mode)); |
9e294f1c | 383 | } |
0b8f18e3 JL |
384 | |
385 | return 0; | |
3020a1f5 SF |
386 | #else |
387 | return -EOPNOTSUPP; | |
388 | #endif | |
9e294f1c SF |
389 | } |
390 | ||
0b8f18e3 | 391 | /* Fill a cifs_fattr struct with info from FILE_ALL_INFO */ |
f1230c97 | 392 | static void |
0b8f18e3 JL |
393 | cifs_all_info_to_fattr(struct cifs_fattr *fattr, FILE_ALL_INFO *info, |
394 | struct cifs_sb_info *cifs_sb, bool adjust_tz) | |
b9a3260f | 395 | { |
0b8f18e3 JL |
396 | memset(fattr, 0, sizeof(*fattr)); |
397 | fattr->cf_cifsattrs = le32_to_cpu(info->Attributes); | |
398 | if (info->DeletePending) | |
399 | fattr->cf_flags |= CIFS_FATTR_DELETE_PENDING; | |
400 | ||
401 | if (info->LastAccessTime) | |
402 | fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); | |
403 | else | |
404 | fattr->cf_atime = CURRENT_TIME; | |
405 | ||
406 | fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime); | |
407 | fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime); | |
408 | ||
409 | if (adjust_tz) { | |
410 | fattr->cf_ctime.tv_sec += cifs_sb->tcon->ses->server->timeAdj; | |
411 | fattr->cf_mtime.tv_sec += cifs_sb->tcon->ses->server->timeAdj; | |
412 | } | |
413 | ||
414 | fattr->cf_eof = le64_to_cpu(info->EndOfFile); | |
415 | fattr->cf_bytes = le64_to_cpu(info->AllocationSize); | |
416 | ||
417 | if (fattr->cf_cifsattrs & ATTR_DIRECTORY) { | |
418 | fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode; | |
419 | fattr->cf_dtype = DT_DIR; | |
420 | } else { | |
421 | fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode; | |
422 | fattr->cf_dtype = DT_REG; | |
0b8f18e3 | 423 | |
d0c280d2 JL |
424 | /* clear write bits if ATTR_READONLY is set */ |
425 | if (fattr->cf_cifsattrs & ATTR_READONLY) | |
426 | fattr->cf_mode &= ~(S_IWUGO); | |
427 | } | |
0b8f18e3 JL |
428 | |
429 | fattr->cf_nlink = le32_to_cpu(info->NumberOfLinks); | |
430 | ||
431 | fattr->cf_uid = cifs_sb->mnt_uid; | |
432 | fattr->cf_gid = cifs_sb->mnt_gid; | |
b9a3260f SF |
433 | } |
434 | ||
1da177e4 | 435 | int cifs_get_inode_info(struct inode **pinode, |
646dd539 | 436 | const unsigned char *full_path, FILE_ALL_INFO *pfindData, |
8b1327f6 | 437 | struct super_block *sb, int xid, const __u16 *pfid) |
1da177e4 | 438 | { |
0b8f18e3 | 439 | int rc = 0, tmprc; |
1da177e4 | 440 | struct cifsTconInfo *pTcon; |
1da177e4 | 441 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
1da177e4 | 442 | char *buf = NULL; |
5ade9dea | 443 | bool adjustTZ = false; |
0b8f18e3 | 444 | struct cifs_fattr fattr; |
1da177e4 LT |
445 | |
446 | pTcon = cifs_sb->tcon; | |
646dd539 | 447 | cFYI(1, ("Getting info on %s", full_path)); |
1da177e4 | 448 | |
d0d2f2df SF |
449 | if ((pfindData == NULL) && (*pinode != NULL)) { |
450 | if (CIFS_I(*pinode)->clientCanCacheRead) { | |
fb8c4b14 | 451 | cFYI(1, ("No need to revalidate cached inode sizes")); |
1da177e4 LT |
452 | return rc; |
453 | } | |
454 | } | |
455 | ||
456 | /* if file info not passed in then get it from server */ | |
d0d2f2df | 457 | if (pfindData == NULL) { |
1da177e4 | 458 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
d0d2f2df | 459 | if (buf == NULL) |
1da177e4 LT |
460 | return -ENOMEM; |
461 | pfindData = (FILE_ALL_INFO *)buf; | |
7962670e | 462 | |
1da177e4 | 463 | /* could do find first instead but this returns more info */ |
7962670e | 464 | rc = CIFSSMBQPathInfo(xid, pTcon, full_path, pfindData, |
acf1a1b1 | 465 | 0 /* not legacy */, |
6b8edfe0 | 466 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
737b758c | 467 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
6b8edfe0 SF |
468 | /* BB optimize code so we do not make the above call |
469 | when server claims no NT SMB support and the above call | |
470 | failed at least once - set flag in tcon or mount */ | |
4523cc30 | 471 | if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) { |
7962670e | 472 | rc = SMBQueryInformation(xid, pTcon, full_path, |
fb8c4b14 | 473 | pfindData, cifs_sb->local_nls, |
6b8edfe0 SF |
474 | cifs_sb->mnt_cifs_flags & |
475 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
4b18f2a9 | 476 | adjustTZ = true; |
6b8edfe0 | 477 | } |
1da177e4 | 478 | } |
0b8f18e3 JL |
479 | |
480 | if (!rc) { | |
481 | cifs_all_info_to_fattr(&fattr, (FILE_ALL_INFO *) pfindData, | |
482 | cifs_sb, adjustTZ); | |
483 | } else if (rc == -EREMOTE) { | |
484 | cifs_create_dfs_fattr(&fattr, sb); | |
b9a3260f | 485 | rc = 0; |
0b8f18e3 | 486 | } else { |
7962670e | 487 | goto cgii_exit; |
0b8f18e3 | 488 | } |
1da177e4 | 489 | |
0b8f18e3 JL |
490 | /* |
491 | * If an inode wasn't passed in, then get the inode number | |
492 | * | |
493 | * Is an i_ino of zero legal? Can we use that to check if the server | |
494 | * supports returning inode numbers? Are there other sanity checks we | |
495 | * can use to ensure that the server is really filling in that field? | |
496 | * | |
497 | * We can not use the IndexNumber field by default from Windows or | |
498 | * Samba (in ALL_INFO buf) but we can request it explicitly. The SNIA | |
499 | * CIFS spec claims that this value is unique within the scope of a | |
500 | * share, and the windows docs hint that it's actually unique | |
501 | * per-machine. | |
502 | * | |
503 | * There may be higher info levels that work but are there Windows | |
504 | * server or network appliances for which IndexNumber field is not | |
505 | * guaranteed unique? | |
506 | */ | |
b9a3260f | 507 | if (*pinode == NULL) { |
b9a3260f SF |
508 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
509 | int rc1 = 0; | |
b9a3260f SF |
510 | |
511 | rc1 = CIFSGetSrvInodeNumber(xid, pTcon, | |
0b8f18e3 | 512 | full_path, &fattr.cf_uniqueid, |
737b758c SF |
513 | cifs_sb->local_nls, |
514 | cifs_sb->mnt_cifs_flags & | |
515 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
ec06aedd | 516 | if (rc1 || !fattr.cf_uniqueid) { |
0b8f18e3 JL |
517 | cFYI(1, ("GetSrvInodeNum rc %d", rc1)); |
518 | fattr.cf_uniqueid = iunique(sb, ROOT_I); | |
ec06aedd | 519 | cifs_autodisable_serverino(cifs_sb); |
132ac7b7 | 520 | } |
132ac7b7 | 521 | } else { |
0b8f18e3 | 522 | fattr.cf_uniqueid = iunique(sb, ROOT_I); |
132ac7b7 | 523 | } |
b9a3260f | 524 | } else { |
0b8f18e3 | 525 | fattr.cf_uniqueid = CIFS_I(*pinode)->uniqueid; |
b9a3260f SF |
526 | } |
527 | ||
0b8f18e3 JL |
528 | /* query for SFU type info if supported and needed */ |
529 | if (fattr.cf_cifsattrs & ATTR_SYSTEM && | |
530 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { | |
531 | tmprc = cifs_sfu_type(&fattr, full_path, cifs_sb, xid); | |
532 | if (tmprc) | |
533 | cFYI(1, ("cifs_sfu_type failed: %d", tmprc)); | |
b9a3260f | 534 | } |
1da177e4 | 535 | |
4879b448 | 536 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
b9a3260f SF |
537 | /* fill in 0777 bits from ACL */ |
538 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { | |
539 | cFYI(1, ("Getting mode bits from ACL")); | |
0b8f18e3 | 540 | cifs_acl_to_fattr(cifs_sb, &fattr, *pinode, full_path, pfid); |
b9a3260f | 541 | } |
4879b448 | 542 | #endif |
b9a3260f | 543 | |
0b8f18e3 JL |
544 | /* fill in remaining high mode bits e.g. SUID, VTX */ |
545 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) | |
546 | cifs_sfu_mode(&fattr, full_path, cifs_sb, xid); | |
b9a3260f | 547 | |
0b8f18e3 JL |
548 | if (!*pinode) { |
549 | *pinode = cifs_iget(sb, &fattr); | |
550 | if (!*pinode) | |
551 | rc = -ENOMEM; | |
552 | } else { | |
553 | cifs_fattr_to_inode(*pinode, &fattr); | |
554 | } | |
b9a3260f | 555 | |
7962670e | 556 | cgii_exit: |
1da177e4 LT |
557 | kfree(buf); |
558 | return rc; | |
559 | } | |
560 | ||
7f8ed420 SF |
561 | static const struct inode_operations cifs_ipc_inode_ops = { |
562 | .lookup = cifs_lookup, | |
563 | }; | |
564 | ||
e4cce94c | 565 | char *cifs_build_path_to_root(struct cifs_sb_info *cifs_sb) |
8be0ed44 SF |
566 | { |
567 | int pplen = cifs_sb->prepathlen; | |
568 | int dfsplen; | |
569 | char *full_path = NULL; | |
570 | ||
571 | /* if no prefix path, simply set path to the root of share to "" */ | |
572 | if (pplen == 0) { | |
573 | full_path = kmalloc(1, GFP_KERNEL); | |
574 | if (full_path) | |
575 | full_path[0] = 0; | |
576 | return full_path; | |
577 | } | |
578 | ||
579 | if (cifs_sb->tcon && (cifs_sb->tcon->Flags & SMB_SHARE_IS_IN_DFS)) | |
580 | dfsplen = strnlen(cifs_sb->tcon->treeName, MAX_TREE_SIZE + 1); | |
581 | else | |
582 | dfsplen = 0; | |
583 | ||
584 | full_path = kmalloc(dfsplen + pplen + 1, GFP_KERNEL); | |
585 | if (full_path == NULL) | |
586 | return full_path; | |
587 | ||
588 | if (dfsplen) { | |
589 | strncpy(full_path, cifs_sb->tcon->treeName, dfsplen); | |
590 | /* switch slash direction in prepath depending on whether | |
591 | * windows or posix style path names | |
592 | */ | |
593 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) { | |
594 | int i; | |
595 | for (i = 0; i < dfsplen; i++) { | |
596 | if (full_path[i] == '\\') | |
597 | full_path[i] = '/'; | |
598 | } | |
599 | } | |
600 | } | |
601 | strncpy(full_path + dfsplen, cifs_sb->prepath, pplen); | |
602 | full_path[dfsplen + pplen] = 0; /* add trailing null */ | |
603 | return full_path; | |
604 | } | |
605 | ||
cc0bad75 JL |
606 | static int |
607 | cifs_find_inode(struct inode *inode, void *opaque) | |
608 | { | |
609 | struct cifs_fattr *fattr = (struct cifs_fattr *) opaque; | |
610 | ||
611 | if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid) | |
612 | return 0; | |
613 | ||
614 | return 1; | |
615 | } | |
616 | ||
617 | static int | |
618 | cifs_init_inode(struct inode *inode, void *opaque) | |
619 | { | |
620 | struct cifs_fattr *fattr = (struct cifs_fattr *) opaque; | |
621 | ||
622 | CIFS_I(inode)->uniqueid = fattr->cf_uniqueid; | |
623 | return 0; | |
624 | } | |
625 | ||
626 | /* Given fattrs, get a corresponding inode */ | |
627 | struct inode * | |
628 | cifs_iget(struct super_block *sb, struct cifs_fattr *fattr) | |
629 | { | |
630 | unsigned long hash; | |
631 | struct inode *inode; | |
632 | ||
633 | cFYI(1, ("looking for uniqueid=%llu", fattr->cf_uniqueid)); | |
634 | ||
635 | /* hash down to 32-bits on 32-bit arch */ | |
636 | hash = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid); | |
637 | ||
638 | inode = iget5_locked(sb, hash, cifs_find_inode, cifs_init_inode, fattr); | |
639 | ||
640 | /* we have fattrs in hand, update the inode */ | |
641 | if (inode) { | |
642 | cifs_fattr_to_inode(inode, fattr); | |
643 | if (sb->s_flags & MS_NOATIME) | |
644 | inode->i_flags |= S_NOATIME | S_NOCMTIME; | |
645 | if (inode->i_state & I_NEW) { | |
646 | inode->i_ino = hash; | |
647 | unlock_new_inode(inode); | |
648 | } | |
649 | } | |
650 | ||
651 | return inode; | |
652 | } | |
653 | ||
1da177e4 | 654 | /* gets root inode */ |
bd433d4c | 655 | struct inode *cifs_root_iget(struct super_block *sb, unsigned long ino) |
1da177e4 | 656 | { |
ce634ab2 | 657 | int xid; |
1da177e4 | 658 | struct cifs_sb_info *cifs_sb; |
cc0bad75 | 659 | struct inode *inode = NULL; |
ce634ab2 | 660 | long rc; |
8be0ed44 | 661 | char *full_path; |
ce634ab2 | 662 | |
cc0bad75 | 663 | cifs_sb = CIFS_SB(sb); |
e4cce94c | 664 | full_path = cifs_build_path_to_root(cifs_sb); |
8be0ed44 SF |
665 | if (full_path == NULL) |
666 | return ERR_PTR(-ENOMEM); | |
c18c842b | 667 | |
8be0ed44 | 668 | xid = GetXid(); |
0b8f18e3 | 669 | if (cifs_sb->tcon->unix_ext) |
cc0bad75 | 670 | rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid); |
0b8f18e3 JL |
671 | else |
672 | rc = cifs_get_inode_info(&inode, full_path, NULL, sb, | |
8be0ed44 | 673 | xid, NULL); |
0b8f18e3 JL |
674 | |
675 | if (!inode) | |
676 | return ERR_PTR(-ENOMEM); | |
cc0bad75 | 677 | |
7f8ed420 SF |
678 | if (rc && cifs_sb->tcon->ipc) { |
679 | cFYI(1, ("ipc connection - fake read inode")); | |
680 | inode->i_mode |= S_IFDIR; | |
681 | inode->i_nlink = 2; | |
682 | inode->i_op = &cifs_ipc_inode_ops; | |
683 | inode->i_fop = &simple_dir_operations; | |
684 | inode->i_uid = cifs_sb->mnt_uid; | |
685 | inode->i_gid = cifs_sb->mnt_gid; | |
ad661334 | 686 | } else if (rc) { |
8be0ed44 | 687 | kfree(full_path); |
ce634ab2 DH |
688 | _FreeXid(xid); |
689 | iget_failed(inode); | |
690 | return ERR_PTR(rc); | |
7f8ed420 SF |
691 | } |
692 | ||
ce634ab2 | 693 | |
8be0ed44 | 694 | kfree(full_path); |
ce634ab2 DH |
695 | /* can not call macro FreeXid here since in a void func |
696 | * TODO: This is no longer true | |
697 | */ | |
1da177e4 | 698 | _FreeXid(xid); |
ce634ab2 | 699 | return inode; |
1da177e4 LT |
700 | } |
701 | ||
388e57b2 SF |
702 | static int |
703 | cifs_set_file_info(struct inode *inode, struct iattr *attrs, int xid, | |
704 | char *full_path, __u32 dosattr) | |
705 | { | |
706 | int rc; | |
707 | int oplock = 0; | |
708 | __u16 netfid; | |
709 | __u32 netpid; | |
710 | bool set_time = false; | |
711 | struct cifsFileInfo *open_file; | |
712 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); | |
713 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
714 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
715 | FILE_BASIC_INFO info_buf; | |
716 | ||
1adcb710 SF |
717 | if (attrs == NULL) |
718 | return -EINVAL; | |
719 | ||
388e57b2 SF |
720 | if (attrs->ia_valid & ATTR_ATIME) { |
721 | set_time = true; | |
722 | info_buf.LastAccessTime = | |
723 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime)); | |
724 | } else | |
725 | info_buf.LastAccessTime = 0; | |
726 | ||
727 | if (attrs->ia_valid & ATTR_MTIME) { | |
728 | set_time = true; | |
729 | info_buf.LastWriteTime = | |
730 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime)); | |
731 | } else | |
732 | info_buf.LastWriteTime = 0; | |
733 | ||
734 | /* | |
735 | * Samba throws this field away, but windows may actually use it. | |
736 | * Do not set ctime unless other time stamps are changed explicitly | |
737 | * (i.e. by utimes()) since we would then have a mix of client and | |
738 | * server times. | |
739 | */ | |
740 | if (set_time && (attrs->ia_valid & ATTR_CTIME)) { | |
741 | cFYI(1, ("CIFS - CTIME changed")); | |
742 | info_buf.ChangeTime = | |
743 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime)); | |
744 | } else | |
745 | info_buf.ChangeTime = 0; | |
746 | ||
747 | info_buf.CreationTime = 0; /* don't change */ | |
748 | info_buf.Attributes = cpu_to_le32(dosattr); | |
749 | ||
750 | /* | |
751 | * If the file is already open for write, just use that fileid | |
752 | */ | |
753 | open_file = find_writable_file(cifsInode); | |
754 | if (open_file) { | |
755 | netfid = open_file->netfid; | |
756 | netpid = open_file->pid; | |
757 | goto set_via_filehandle; | |
758 | } | |
759 | ||
760 | /* | |
761 | * NT4 apparently returns success on this call, but it doesn't | |
762 | * really work. | |
763 | */ | |
764 | if (!(pTcon->ses->flags & CIFS_SES_NT4)) { | |
765 | rc = CIFSSMBSetPathInfo(xid, pTcon, full_path, | |
766 | &info_buf, cifs_sb->local_nls, | |
767 | cifs_sb->mnt_cifs_flags & | |
768 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
6b37faa1 JL |
769 | if (rc == 0) { |
770 | cifsInode->cifsAttrs = dosattr; | |
771 | goto out; | |
772 | } else if (rc != -EOPNOTSUPP && rc != -EINVAL) | |
388e57b2 SF |
773 | goto out; |
774 | } | |
775 | ||
776 | cFYI(1, ("calling SetFileInfo since SetPathInfo for " | |
777 | "times not supported by this server")); | |
778 | rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, | |
779 | SYNCHRONIZE | FILE_WRITE_ATTRIBUTES, | |
780 | CREATE_NOT_DIR, &netfid, &oplock, | |
781 | NULL, cifs_sb->local_nls, | |
782 | cifs_sb->mnt_cifs_flags & | |
783 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
784 | ||
785 | if (rc != 0) { | |
786 | if (rc == -EIO) | |
787 | rc = -EINVAL; | |
788 | goto out; | |
789 | } | |
790 | ||
791 | netpid = current->tgid; | |
792 | ||
793 | set_via_filehandle: | |
794 | rc = CIFSSMBSetFileInfo(xid, pTcon, &info_buf, netfid, netpid); | |
d388908e SF |
795 | if (!rc) |
796 | cifsInode->cifsAttrs = dosattr; | |
797 | ||
388e57b2 SF |
798 | if (open_file == NULL) |
799 | CIFSSMBClose(xid, pTcon, netfid); | |
800 | else | |
6ab409b5 | 801 | cifsFileInfo_put(open_file); |
388e57b2 SF |
802 | out: |
803 | return rc; | |
804 | } | |
805 | ||
a12a1ac7 JL |
806 | /* |
807 | * open the given file (if it isn't already), set the DELETE_ON_CLOSE bit | |
808 | * and rename it to a random name that hopefully won't conflict with | |
809 | * anything else. | |
810 | */ | |
811 | static int | |
3270958b | 812 | cifs_rename_pending_delete(char *full_path, struct dentry *dentry, int xid) |
a12a1ac7 JL |
813 | { |
814 | int oplock = 0; | |
815 | int rc; | |
816 | __u16 netfid; | |
3270958b | 817 | struct inode *inode = dentry->d_inode; |
a12a1ac7 JL |
818 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
819 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
820 | struct cifsTconInfo *tcon = cifs_sb->tcon; | |
3270958b SF |
821 | __u32 dosattr, origattr; |
822 | FILE_BASIC_INFO *info_buf = NULL; | |
a12a1ac7 JL |
823 | |
824 | rc = CIFSSMBOpen(xid, tcon, full_path, FILE_OPEN, | |
dd1db2de | 825 | DELETE|FILE_WRITE_ATTRIBUTES, CREATE_NOT_DIR, |
a12a1ac7 JL |
826 | &netfid, &oplock, NULL, cifs_sb->local_nls, |
827 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
828 | if (rc != 0) | |
829 | goto out; | |
830 | ||
3270958b SF |
831 | origattr = cifsInode->cifsAttrs; |
832 | if (origattr == 0) | |
833 | origattr |= ATTR_NORMAL; | |
834 | ||
835 | dosattr = origattr & ~ATTR_READONLY; | |
a12a1ac7 JL |
836 | if (dosattr == 0) |
837 | dosattr |= ATTR_NORMAL; | |
838 | dosattr |= ATTR_HIDDEN; | |
839 | ||
3270958b SF |
840 | /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */ |
841 | if (dosattr != origattr) { | |
842 | info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL); | |
843 | if (info_buf == NULL) { | |
844 | rc = -ENOMEM; | |
845 | goto out_close; | |
846 | } | |
847 | info_buf->Attributes = cpu_to_le32(dosattr); | |
848 | rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid, | |
849 | current->tgid); | |
850 | /* although we would like to mark the file hidden | |
851 | if that fails we will still try to rename it */ | |
41346098 | 852 | if (rc != 0) |
3270958b SF |
853 | cifsInode->cifsAttrs = dosattr; |
854 | else | |
855 | dosattr = origattr; /* since not able to change them */ | |
a12a1ac7 | 856 | } |
a12a1ac7 | 857 | |
dd1db2de JL |
858 | /* rename the file */ |
859 | rc = CIFSSMBRenameOpenFile(xid, tcon, netfid, NULL, cifs_sb->local_nls, | |
a12a1ac7 JL |
860 | cifs_sb->mnt_cifs_flags & |
861 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
3270958b SF |
862 | if (rc != 0) { |
863 | rc = -ETXTBSY; | |
864 | goto undo_setattr; | |
865 | } | |
6d22f098 | 866 | |
3270958b SF |
867 | /* try to set DELETE_ON_CLOSE */ |
868 | if (!cifsInode->delete_pending) { | |
869 | rc = CIFSSMBSetFileDisposition(xid, tcon, true, netfid, | |
870 | current->tgid); | |
871 | /* | |
872 | * some samba versions return -ENOENT when we try to set the | |
873 | * file disposition here. Likely a samba bug, but work around | |
874 | * it for now. This means that some cifsXXX files may hang | |
875 | * around after they shouldn't. | |
876 | * | |
877 | * BB: remove this hack after more servers have the fix | |
878 | */ | |
879 | if (rc == -ENOENT) | |
880 | rc = 0; | |
881 | else if (rc != 0) { | |
882 | rc = -ETXTBSY; | |
883 | goto undo_rename; | |
884 | } | |
885 | cifsInode->delete_pending = true; | |
886 | } | |
7ce86d5a | 887 | |
a12a1ac7 JL |
888 | out_close: |
889 | CIFSSMBClose(xid, tcon, netfid); | |
890 | out: | |
3270958b | 891 | kfree(info_buf); |
a12a1ac7 | 892 | return rc; |
3270958b SF |
893 | |
894 | /* | |
895 | * reset everything back to the original state. Don't bother | |
896 | * dealing with errors here since we can't do anything about | |
897 | * them anyway. | |
898 | */ | |
899 | undo_rename: | |
900 | CIFSSMBRenameOpenFile(xid, tcon, netfid, dentry->d_name.name, | |
901 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
902 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
903 | undo_setattr: | |
904 | if (dosattr != origattr) { | |
905 | info_buf->Attributes = cpu_to_le32(origattr); | |
906 | if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid, | |
907 | current->tgid)) | |
908 | cifsInode->cifsAttrs = origattr; | |
909 | } | |
910 | ||
911 | goto out_close; | |
a12a1ac7 JL |
912 | } |
913 | ||
ff694527 SF |
914 | |
915 | /* | |
916 | * If dentry->d_inode is null (usually meaning the cached dentry | |
917 | * is a negative dentry) then we would attempt a standard SMB delete, but | |
af901ca1 AGR |
918 | * if that fails we can not attempt the fall back mechanisms on EACCESS |
919 | * but will return the EACCESS to the caller. Note that the VFS does not call | |
ff694527 SF |
920 | * unlink on negative dentries currently. |
921 | */ | |
5f0319a7 | 922 | int cifs_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
923 | { |
924 | int rc = 0; | |
925 | int xid; | |
1da177e4 | 926 | char *full_path = NULL; |
5f0319a7 | 927 | struct inode *inode = dentry->d_inode; |
ff694527 | 928 | struct cifsInodeInfo *cifs_inode; |
5f0319a7 JL |
929 | struct super_block *sb = dir->i_sb; |
930 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
931 | struct cifsTconInfo *tcon = cifs_sb->tcon; | |
6050247d SF |
932 | struct iattr *attrs = NULL; |
933 | __u32 dosattr = 0, origattr = 0; | |
1da177e4 | 934 | |
5f0319a7 | 935 | cFYI(1, ("cifs_unlink, dir=0x%p, dentry=0x%p", dir, dentry)); |
1da177e4 LT |
936 | |
937 | xid = GetXid(); | |
938 | ||
5f0319a7 JL |
939 | /* Unlink can be called from rename so we can not take the |
940 | * sb->s_vfs_rename_mutex here */ | |
941 | full_path = build_path_from_dentry(dentry); | |
1da177e4 | 942 | if (full_path == NULL) { |
0f3bc09e | 943 | rc = -ENOMEM; |
1da177e4 | 944 | FreeXid(xid); |
0f3bc09e | 945 | return rc; |
1da177e4 | 946 | } |
2d785a50 | 947 | |
5f0319a7 | 948 | if ((tcon->ses->capabilities & CAP_UNIX) && |
2d785a50 | 949 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
5f0319a7 JL |
950 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { |
951 | rc = CIFSPOSIXDelFile(xid, tcon, full_path, | |
2d785a50 | 952 | SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls, |
737b758c | 953 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
2d785a50 SF |
954 | cFYI(1, ("posix del rc %d", rc)); |
955 | if ((rc == 0) || (rc == -ENOENT)) | |
956 | goto psx_del_no_retry; | |
957 | } | |
1da177e4 | 958 | |
6050247d | 959 | retry_std_delete: |
5f0319a7 | 960 | rc = CIFSSMBDelFile(xid, tcon, full_path, cifs_sb->local_nls, |
2d785a50 | 961 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
6050247d | 962 | |
2d785a50 | 963 | psx_del_no_retry: |
1da177e4 | 964 | if (!rc) { |
5f0319a7 JL |
965 | if (inode) |
966 | drop_nlink(inode); | |
1da177e4 | 967 | } else if (rc == -ENOENT) { |
5f0319a7 | 968 | d_drop(dentry); |
1da177e4 | 969 | } else if (rc == -ETXTBSY) { |
3270958b | 970 | rc = cifs_rename_pending_delete(full_path, dentry, xid); |
a12a1ac7 JL |
971 | if (rc == 0) |
972 | drop_nlink(inode); | |
ff694527 | 973 | } else if ((rc == -EACCES) && (dosattr == 0) && inode) { |
388e57b2 SF |
974 | attrs = kzalloc(sizeof(*attrs), GFP_KERNEL); |
975 | if (attrs == NULL) { | |
976 | rc = -ENOMEM; | |
977 | goto out_reval; | |
1da177e4 | 978 | } |
388e57b2 SF |
979 | |
980 | /* try to reset dos attributes */ | |
ff694527 SF |
981 | cifs_inode = CIFS_I(inode); |
982 | origattr = cifs_inode->cifsAttrs; | |
6050247d SF |
983 | if (origattr == 0) |
984 | origattr |= ATTR_NORMAL; | |
985 | dosattr = origattr & ~ATTR_READONLY; | |
388e57b2 SF |
986 | if (dosattr == 0) |
987 | dosattr |= ATTR_NORMAL; | |
988 | dosattr |= ATTR_HIDDEN; | |
989 | ||
990 | rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); | |
388e57b2 SF |
991 | if (rc != 0) |
992 | goto out_reval; | |
6050247d SF |
993 | |
994 | goto retry_std_delete; | |
1da177e4 | 995 | } |
6050247d SF |
996 | |
997 | /* undo the setattr if we errored out and it's needed */ | |
998 | if (rc != 0 && dosattr != 0) | |
999 | cifs_set_file_info(inode, attrs, xid, full_path, origattr); | |
1000 | ||
388e57b2 | 1001 | out_reval: |
4523cc30 | 1002 | if (inode) { |
ff694527 SF |
1003 | cifs_inode = CIFS_I(inode); |
1004 | cifs_inode->time = 0; /* will force revalidate to get info | |
5f0319a7 JL |
1005 | when needed */ |
1006 | inode->i_ctime = current_fs_time(sb); | |
06bcfedd | 1007 | } |
5f0319a7 | 1008 | dir->i_ctime = dir->i_mtime = current_fs_time(sb); |
ff694527 | 1009 | cifs_inode = CIFS_I(dir); |
6050247d | 1010 | CIFS_I(dir)->time = 0; /* force revalidate of dir as well */ |
1da177e4 LT |
1011 | |
1012 | kfree(full_path); | |
6050247d | 1013 | kfree(attrs); |
1da177e4 LT |
1014 | FreeXid(xid); |
1015 | return rc; | |
1016 | } | |
1017 | ||
1018 | int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode) | |
1019 | { | |
6b37faa1 | 1020 | int rc = 0, tmprc; |
1da177e4 LT |
1021 | int xid; |
1022 | struct cifs_sb_info *cifs_sb; | |
1023 | struct cifsTconInfo *pTcon; | |
1024 | char *full_path = NULL; | |
1025 | struct inode *newinode = NULL; | |
cc0bad75 | 1026 | struct cifs_fattr fattr; |
1da177e4 | 1027 | |
6473a559 | 1028 | cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode)); |
1da177e4 LT |
1029 | |
1030 | xid = GetXid(); | |
1031 | ||
1032 | cifs_sb = CIFS_SB(inode->i_sb); | |
1033 | pTcon = cifs_sb->tcon; | |
1034 | ||
7f57356b | 1035 | full_path = build_path_from_dentry(direntry); |
1da177e4 | 1036 | if (full_path == NULL) { |
0f3bc09e | 1037 | rc = -ENOMEM; |
1da177e4 | 1038 | FreeXid(xid); |
0f3bc09e | 1039 | return rc; |
1da177e4 | 1040 | } |
50c2f753 | 1041 | |
fb8c4b14 SF |
1042 | if ((pTcon->ses->capabilities & CAP_UNIX) && |
1043 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & | |
2dd29d31 SF |
1044 | le64_to_cpu(pTcon->fsUnixInfo.Capability))) { |
1045 | u32 oplock = 0; | |
f6d09982 | 1046 | FILE_UNIX_BASIC_INFO *pInfo = |
2dd29d31 | 1047 | kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL); |
fb8c4b14 | 1048 | if (pInfo == NULL) { |
2dd29d31 SF |
1049 | rc = -ENOMEM; |
1050 | goto mkdir_out; | |
1051 | } | |
50c2f753 | 1052 | |
ce3b0f8d | 1053 | mode &= ~current_umask(); |
2dd29d31 SF |
1054 | rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT, |
1055 | mode, NULL /* netfid */, pInfo, &oplock, | |
fb8c4b14 SF |
1056 | full_path, cifs_sb->local_nls, |
1057 | cifs_sb->mnt_cifs_flags & | |
2dd29d31 | 1058 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
c45d707f SF |
1059 | if (rc == -EOPNOTSUPP) { |
1060 | kfree(pInfo); | |
1061 | goto mkdir_retry_old; | |
1062 | } else if (rc) { | |
2dd29d31 SF |
1063 | cFYI(1, ("posix mkdir returned 0x%x", rc)); |
1064 | d_drop(direntry); | |
1065 | } else { | |
8f2376ad CG |
1066 | if (pInfo->Type == cpu_to_le32(-1)) { |
1067 | /* no return info, go query for it */ | |
5a07cdf8 | 1068 | kfree(pInfo); |
fb8c4b14 | 1069 | goto mkdir_get_info; |
5a07cdf8 | 1070 | } |
fb8c4b14 SF |
1071 | /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need |
1072 | to set uid/gid */ | |
2dd29d31 SF |
1073 | inc_nlink(inode); |
1074 | if (pTcon->nocase) | |
1075 | direntry->d_op = &cifs_ci_dentry_ops; | |
1076 | else | |
1077 | direntry->d_op = &cifs_dentry_ops; | |
cbac3cba | 1078 | |
cc0bad75 JL |
1079 | cifs_unix_basic_to_fattr(&fattr, pInfo, cifs_sb); |
1080 | newinode = cifs_iget(inode->i_sb, &fattr); | |
1081 | if (!newinode) { | |
5a07cdf8 | 1082 | kfree(pInfo); |
cbac3cba | 1083 | goto mkdir_get_info; |
5a07cdf8 | 1084 | } |
6b37faa1 | 1085 | |
2dd29d31 | 1086 | d_instantiate(direntry, newinode); |
cbac3cba | 1087 | |
cbac3cba | 1088 | #ifdef CONFIG_CIFS_DEBUG2 |
fb8c4b14 | 1089 | cFYI(1, ("instantiated dentry %p %s to inode %p", |
cbac3cba SF |
1090 | direntry, direntry->d_name.name, newinode)); |
1091 | ||
fb8c4b14 SF |
1092 | if (newinode->i_nlink != 2) |
1093 | cFYI(1, ("unexpected number of links %d", | |
cbac3cba SF |
1094 | newinode->i_nlink)); |
1095 | #endif | |
2dd29d31 SF |
1096 | } |
1097 | kfree(pInfo); | |
1098 | goto mkdir_out; | |
fb8c4b14 | 1099 | } |
c45d707f | 1100 | mkdir_retry_old: |
1da177e4 | 1101 | /* BB add setting the equivalent of mode via CreateX w/ACLs */ |
737b758c SF |
1102 | rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls, |
1103 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 | 1104 | if (rc) { |
26a21b98 | 1105 | cFYI(1, ("cifs_mkdir returned 0x%x", rc)); |
1da177e4 LT |
1106 | d_drop(direntry); |
1107 | } else { | |
fb8c4b14 | 1108 | mkdir_get_info: |
d8c76e6f | 1109 | inc_nlink(inode); |
c18c842b | 1110 | if (pTcon->unix_ext) |
1da177e4 | 1111 | rc = cifs_get_inode_info_unix(&newinode, full_path, |
fb8c4b14 | 1112 | inode->i_sb, xid); |
1da177e4 LT |
1113 | else |
1114 | rc = cifs_get_inode_info(&newinode, full_path, NULL, | |
8b1327f6 | 1115 | inode->i_sb, xid, NULL); |
1da177e4 | 1116 | |
b92327fe SF |
1117 | if (pTcon->nocase) |
1118 | direntry->d_op = &cifs_ci_dentry_ops; | |
1119 | else | |
1120 | direntry->d_op = &cifs_dentry_ops; | |
1da177e4 | 1121 | d_instantiate(direntry, newinode); |
2dd29d31 | 1122 | /* setting nlink not necessary except in cases where we |
fb8c4b14 | 1123 | * failed to get it from the server or was set bogus */ |
2dd29d31 | 1124 | if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2)) |
fb8c4b14 | 1125 | direntry->d_inode->i_nlink = 2; |
95089910 | 1126 | |
ce3b0f8d | 1127 | mode &= ~current_umask(); |
95089910 JL |
1128 | /* must turn on setgid bit if parent dir has it */ |
1129 | if (inode->i_mode & S_ISGID) | |
1130 | mode |= S_ISGID; | |
1131 | ||
c18c842b | 1132 | if (pTcon->unix_ext) { |
4e1e7fb9 JL |
1133 | struct cifs_unix_set_info_args args = { |
1134 | .mode = mode, | |
1135 | .ctime = NO_CHANGE_64, | |
1136 | .atime = NO_CHANGE_64, | |
1137 | .mtime = NO_CHANGE_64, | |
1138 | .device = 0, | |
1139 | }; | |
d0d2f2df | 1140 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
a001e5b5 | 1141 | args.uid = (__u64)current_fsuid(); |
95089910 JL |
1142 | if (inode->i_mode & S_ISGID) |
1143 | args.gid = (__u64)inode->i_gid; | |
1144 | else | |
a001e5b5 | 1145 | args.gid = (__u64)current_fsgid(); |
1da177e4 | 1146 | } else { |
4e1e7fb9 JL |
1147 | args.uid = NO_CHANGE_64; |
1148 | args.gid = NO_CHANGE_64; | |
1da177e4 | 1149 | } |
01ea95e3 JL |
1150 | CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, &args, |
1151 | cifs_sb->local_nls, | |
1152 | cifs_sb->mnt_cifs_flags & | |
1153 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
3ce53fc4 | 1154 | } else { |
67750fb9 JL |
1155 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) && |
1156 | (mode & S_IWUGO) == 0) { | |
1157 | FILE_BASIC_INFO pInfo; | |
6b37faa1 JL |
1158 | struct cifsInodeInfo *cifsInode; |
1159 | u32 dosattrs; | |
1160 | ||
67750fb9 | 1161 | memset(&pInfo, 0, sizeof(pInfo)); |
6b37faa1 JL |
1162 | cifsInode = CIFS_I(newinode); |
1163 | dosattrs = cifsInode->cifsAttrs|ATTR_READONLY; | |
1164 | pInfo.Attributes = cpu_to_le32(dosattrs); | |
1165 | tmprc = CIFSSMBSetPathInfo(xid, pTcon, | |
1166 | full_path, &pInfo, | |
1167 | cifs_sb->local_nls, | |
67750fb9 JL |
1168 | cifs_sb->mnt_cifs_flags & |
1169 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
6b37faa1 JL |
1170 | if (tmprc == 0) |
1171 | cifsInode->cifsAttrs = dosattrs; | |
67750fb9 | 1172 | } |
fb8c4b14 | 1173 | if (direntry->d_inode) { |
b0fd30d3 JL |
1174 | if (cifs_sb->mnt_cifs_flags & |
1175 | CIFS_MOUNT_DYNPERM) | |
1176 | direntry->d_inode->i_mode = | |
1177 | (mode | S_IFDIR); | |
4e94a105 | 1178 | |
fb8c4b14 | 1179 | if (cifs_sb->mnt_cifs_flags & |
6473a559 | 1180 | CIFS_MOUNT_SET_UID) { |
fb8c4b14 | 1181 | direntry->d_inode->i_uid = |
a001e5b5 | 1182 | current_fsuid(); |
95089910 JL |
1183 | if (inode->i_mode & S_ISGID) |
1184 | direntry->d_inode->i_gid = | |
1185 | inode->i_gid; | |
1186 | else | |
1187 | direntry->d_inode->i_gid = | |
a001e5b5 | 1188 | current_fsgid(); |
6473a559 SF |
1189 | } |
1190 | } | |
2a138ebb | 1191 | } |
1da177e4 | 1192 | } |
fb8c4b14 | 1193 | mkdir_out: |
1da177e4 LT |
1194 | kfree(full_path); |
1195 | FreeXid(xid); | |
1196 | return rc; | |
1197 | } | |
1198 | ||
1199 | int cifs_rmdir(struct inode *inode, struct dentry *direntry) | |
1200 | { | |
1201 | int rc = 0; | |
1202 | int xid; | |
1203 | struct cifs_sb_info *cifs_sb; | |
1204 | struct cifsTconInfo *pTcon; | |
1205 | char *full_path = NULL; | |
1206 | struct cifsInodeInfo *cifsInode; | |
1207 | ||
26a21b98 | 1208 | cFYI(1, ("cifs_rmdir, inode = 0x%p", inode)); |
1da177e4 LT |
1209 | |
1210 | xid = GetXid(); | |
1211 | ||
1212 | cifs_sb = CIFS_SB(inode->i_sb); | |
1213 | pTcon = cifs_sb->tcon; | |
1214 | ||
7f57356b | 1215 | full_path = build_path_from_dentry(direntry); |
1da177e4 | 1216 | if (full_path == NULL) { |
0f3bc09e | 1217 | rc = -ENOMEM; |
1da177e4 | 1218 | FreeXid(xid); |
0f3bc09e | 1219 | return rc; |
1da177e4 LT |
1220 | } |
1221 | ||
737b758c SF |
1222 | rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls, |
1223 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
1224 | |
1225 | if (!rc) { | |
9a53c3a7 | 1226 | drop_nlink(inode); |
3677db10 | 1227 | spin_lock(&direntry->d_inode->i_lock); |
fb8c4b14 | 1228 | i_size_write(direntry->d_inode, 0); |
ce71ec36 | 1229 | clear_nlink(direntry->d_inode); |
3677db10 | 1230 | spin_unlock(&direntry->d_inode->i_lock); |
1da177e4 LT |
1231 | } |
1232 | ||
1233 | cifsInode = CIFS_I(direntry->d_inode); | |
1234 | cifsInode->time = 0; /* force revalidate to go get info when | |
1235 | needed */ | |
42c24544 SF |
1236 | |
1237 | cifsInode = CIFS_I(inode); | |
1238 | cifsInode->time = 0; /* force revalidate to get parent dir info | |
1239 | since cached search results now invalid */ | |
1240 | ||
1da177e4 LT |
1241 | direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime = |
1242 | current_fs_time(inode->i_sb); | |
1243 | ||
1244 | kfree(full_path); | |
1245 | FreeXid(xid); | |
1246 | return rc; | |
1247 | } | |
1248 | ||
ee2fd967 SF |
1249 | static int |
1250 | cifs_do_rename(int xid, struct dentry *from_dentry, const char *fromPath, | |
1251 | struct dentry *to_dentry, const char *toPath) | |
1252 | { | |
1253 | struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb); | |
1254 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
1255 | __u16 srcfid; | |
1256 | int oplock, rc; | |
1257 | ||
1258 | /* try path-based rename first */ | |
1259 | rc = CIFSSMBRename(xid, pTcon, fromPath, toPath, cifs_sb->local_nls, | |
1260 | cifs_sb->mnt_cifs_flags & | |
1261 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1262 | ||
1263 | /* | |
1264 | * don't bother with rename by filehandle unless file is busy and | |
1265 | * source Note that cross directory moves do not work with | |
1266 | * rename by filehandle to various Windows servers. | |
1267 | */ | |
1268 | if (rc == 0 || rc != -ETXTBSY) | |
1269 | return rc; | |
1270 | ||
1271 | /* open the file to be renamed -- we need DELETE perms */ | |
1272 | rc = CIFSSMBOpen(xid, pTcon, fromPath, FILE_OPEN, DELETE, | |
1273 | CREATE_NOT_DIR, &srcfid, &oplock, NULL, | |
1274 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
1275 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1276 | ||
1277 | if (rc == 0) { | |
1278 | rc = CIFSSMBRenameOpenFile(xid, pTcon, srcfid, | |
1279 | (const char *) to_dentry->d_name.name, | |
1280 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
1281 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1282 | ||
1283 | CIFSSMBClose(xid, pTcon, srcfid); | |
1284 | } | |
1285 | ||
1286 | return rc; | |
1287 | } | |
1288 | ||
14121bdc JL |
1289 | int cifs_rename(struct inode *source_dir, struct dentry *source_dentry, |
1290 | struct inode *target_dir, struct dentry *target_dentry) | |
1da177e4 | 1291 | { |
ee2fd967 SF |
1292 | char *fromName = NULL; |
1293 | char *toName = NULL; | |
1da177e4 LT |
1294 | struct cifs_sb_info *cifs_sb_source; |
1295 | struct cifs_sb_info *cifs_sb_target; | |
14121bdc | 1296 | struct cifsTconInfo *tcon; |
ee2fd967 SF |
1297 | FILE_UNIX_BASIC_INFO *info_buf_source = NULL; |
1298 | FILE_UNIX_BASIC_INFO *info_buf_target; | |
8d281efb | 1299 | int xid, rc, tmprc; |
1da177e4 | 1300 | |
14121bdc JL |
1301 | cifs_sb_target = CIFS_SB(target_dir->i_sb); |
1302 | cifs_sb_source = CIFS_SB(source_dir->i_sb); | |
1303 | tcon = cifs_sb_source->tcon; | |
1da177e4 | 1304 | |
ee2fd967 SF |
1305 | xid = GetXid(); |
1306 | ||
1307 | /* | |
1308 | * BB: this might be allowed if same server, but different share. | |
1309 | * Consider adding support for this | |
1310 | */ | |
14121bdc | 1311 | if (tcon != cifs_sb_target->tcon) { |
ee2fd967 SF |
1312 | rc = -EXDEV; |
1313 | goto cifs_rename_exit; | |
1da177e4 LT |
1314 | } |
1315 | ||
ee2fd967 SF |
1316 | /* |
1317 | * we already have the rename sem so we do not need to | |
1318 | * grab it again here to protect the path integrity | |
1319 | */ | |
14121bdc | 1320 | fromName = build_path_from_dentry(source_dentry); |
ee2fd967 SF |
1321 | if (fromName == NULL) { |
1322 | rc = -ENOMEM; | |
1323 | goto cifs_rename_exit; | |
1324 | } | |
1325 | ||
14121bdc | 1326 | toName = build_path_from_dentry(target_dentry); |
ee2fd967 | 1327 | if (toName == NULL) { |
1da177e4 LT |
1328 | rc = -ENOMEM; |
1329 | goto cifs_rename_exit; | |
1330 | } | |
1331 | ||
14121bdc JL |
1332 | rc = cifs_do_rename(xid, source_dentry, fromName, |
1333 | target_dentry, toName); | |
ee2fd967 | 1334 | |
14121bdc JL |
1335 | if (rc == -EEXIST && tcon->unix_ext) { |
1336 | /* | |
1337 | * Are src and dst hardlinks of same inode? We can | |
1338 | * only tell with unix extensions enabled | |
1339 | */ | |
1340 | info_buf_source = | |
1341 | kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), | |
1342 | GFP_KERNEL); | |
1343 | if (info_buf_source == NULL) { | |
1344 | rc = -ENOMEM; | |
1345 | goto cifs_rename_exit; | |
1346 | } | |
1347 | ||
1348 | info_buf_target = info_buf_source + 1; | |
8d281efb | 1349 | tmprc = CIFSSMBUnixQPathInfo(xid, tcon, fromName, |
14121bdc JL |
1350 | info_buf_source, |
1351 | cifs_sb_source->local_nls, | |
1352 | cifs_sb_source->mnt_cifs_flags & | |
1353 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
8d281efb | 1354 | if (tmprc != 0) |
14121bdc | 1355 | goto unlink_target; |
ee2fd967 | 1356 | |
8d281efb | 1357 | tmprc = CIFSSMBUnixQPathInfo(xid, tcon, |
14121bdc JL |
1358 | toName, info_buf_target, |
1359 | cifs_sb_target->local_nls, | |
1360 | /* remap based on source sb */ | |
1361 | cifs_sb_source->mnt_cifs_flags & | |
1362 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1363 | ||
8d281efb | 1364 | if (tmprc == 0 && (info_buf_source->UniqueId == |
ae6884a9 | 1365 | info_buf_target->UniqueId)) { |
14121bdc | 1366 | /* same file, POSIX says that this is a noop */ |
ae6884a9 | 1367 | rc = 0; |
14121bdc | 1368 | goto cifs_rename_exit; |
ae6884a9 | 1369 | } |
14121bdc | 1370 | } /* else ... BB we could add the same check for Windows by |
ee2fd967 | 1371 | checking the UniqueId via FILE_INTERNAL_INFO */ |
14121bdc | 1372 | |
ee2fd967 | 1373 | unlink_target: |
fc6f3943 JL |
1374 | /* Try unlinking the target dentry if it's not negative */ |
1375 | if (target_dentry->d_inode && (rc == -EACCES || rc == -EEXIST)) { | |
8d281efb | 1376 | tmprc = cifs_unlink(target_dir, target_dentry); |
14121bdc JL |
1377 | if (tmprc) |
1378 | goto cifs_rename_exit; | |
1379 | ||
14121bdc JL |
1380 | rc = cifs_do_rename(xid, source_dentry, fromName, |
1381 | target_dentry, toName); | |
1da177e4 LT |
1382 | } |
1383 | ||
1384 | cifs_rename_exit: | |
ee2fd967 | 1385 | kfree(info_buf_source); |
1da177e4 LT |
1386 | kfree(fromName); |
1387 | kfree(toName); | |
1388 | FreeXid(xid); | |
1389 | return rc; | |
1390 | } | |
1391 | ||
1392 | int cifs_revalidate(struct dentry *direntry) | |
1393 | { | |
1394 | int xid; | |
cea21805 | 1395 | int rc = 0, wbrc = 0; |
1da177e4 LT |
1396 | char *full_path; |
1397 | struct cifs_sb_info *cifs_sb; | |
1398 | struct cifsInodeInfo *cifsInode; | |
1399 | loff_t local_size; | |
1400 | struct timespec local_mtime; | |
4b18f2a9 | 1401 | bool invalidate_inode = false; |
1da177e4 LT |
1402 | |
1403 | if (direntry->d_inode == NULL) | |
1404 | return -ENOENT; | |
1405 | ||
1406 | cifsInode = CIFS_I(direntry->d_inode); | |
1407 | ||
1408 | if (cifsInode == NULL) | |
1409 | return -ENOENT; | |
1410 | ||
1411 | /* no sense revalidating inode info on file that no one can write */ | |
1412 | if (CIFS_I(direntry->d_inode)->clientCanCacheRead) | |
1413 | return rc; | |
1414 | ||
1415 | xid = GetXid(); | |
1416 | ||
1417 | cifs_sb = CIFS_SB(direntry->d_sb); | |
1418 | ||
1419 | /* can not safely grab the rename sem here if rename calls revalidate | |
1420 | since that would deadlock */ | |
7f57356b | 1421 | full_path = build_path_from_dentry(direntry); |
1da177e4 | 1422 | if (full_path == NULL) { |
0f3bc09e | 1423 | rc = -ENOMEM; |
1da177e4 | 1424 | FreeXid(xid); |
0f3bc09e | 1425 | return rc; |
1da177e4 LT |
1426 | } |
1427 | cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld " | |
1428 | "jiffies %ld", full_path, direntry->d_inode, | |
1429 | direntry->d_inode->i_count.counter, direntry, | |
1430 | direntry->d_time, jiffies)); | |
1431 | ||
1432 | if (cifsInode->time == 0) { | |
1433 | /* was set to zero previously to force revalidate */ | |
1434 | } else if (time_before(jiffies, cifsInode->time + HZ) && | |
1435 | lookupCacheEnabled) { | |
1436 | if ((S_ISREG(direntry->d_inode->i_mode) == 0) || | |
1437 | (direntry->d_inode->i_nlink == 1)) { | |
1438 | kfree(full_path); | |
1439 | FreeXid(xid); | |
1440 | return rc; | |
1441 | } else { | |
1442 | cFYI(1, ("Have to revalidate file due to hardlinks")); | |
1443 | } | |
1444 | } | |
1445 | ||
1446 | /* save mtime and size */ | |
1447 | local_mtime = direntry->d_inode->i_mtime; | |
1448 | local_size = direntry->d_inode->i_size; | |
1449 | ||
c18c842b | 1450 | if (cifs_sb->tcon->unix_ext) { |
1da177e4 | 1451 | rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path, |
fb8c4b14 | 1452 | direntry->d_sb, xid); |
1da177e4 LT |
1453 | if (rc) { |
1454 | cFYI(1, ("error on getting revalidate info %d", rc)); | |
1455 | /* if (rc != -ENOENT) | |
1456 | rc = 0; */ /* BB should we cache info on | |
1457 | certain errors? */ | |
1458 | } | |
1459 | } else { | |
1460 | rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL, | |
8b1327f6 | 1461 | direntry->d_sb, xid, NULL); |
1da177e4 LT |
1462 | if (rc) { |
1463 | cFYI(1, ("error on getting revalidate info %d", rc)); | |
1464 | /* if (rc != -ENOENT) | |
1465 | rc = 0; */ /* BB should we cache info on | |
1466 | certain errors? */ | |
1467 | } | |
1468 | } | |
1469 | /* should we remap certain errors, access denied?, to zero */ | |
1470 | ||
1471 | /* if not oplocked, we invalidate inode pages if mtime or file size | |
1472 | had changed on server */ | |
1473 | ||
fb8c4b14 | 1474 | if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) && |
1da177e4 LT |
1475 | (local_size == direntry->d_inode->i_size)) { |
1476 | cFYI(1, ("cifs_revalidate - inode unchanged")); | |
1477 | } else { | |
1478 | /* file may have changed on server */ | |
1479 | if (cifsInode->clientCanCacheRead) { | |
1480 | /* no need to invalidate inode pages since we were the | |
1481 | only ones who could have modified the file and the | |
1482 | server copy is staler than ours */ | |
1483 | } else { | |
4b18f2a9 | 1484 | invalidate_inode = true; |
1da177e4 LT |
1485 | } |
1486 | } | |
1487 | ||
1488 | /* can not grab this sem since kernel filesys locking documentation | |
1b1dcc1b JS |
1489 | indicates i_mutex may be taken by the kernel on lookup and rename |
1490 | which could deadlock if we grab the i_mutex here as well */ | |
1491 | /* mutex_lock(&direntry->d_inode->i_mutex);*/ | |
1da177e4 LT |
1492 | /* need to write out dirty pages here */ |
1493 | if (direntry->d_inode->i_mapping) { | |
1494 | /* do we need to lock inode until after invalidate completes | |
1495 | below? */ | |
cea21805 JL |
1496 | wbrc = filemap_fdatawrite(direntry->d_inode->i_mapping); |
1497 | if (wbrc) | |
1498 | CIFS_I(direntry->d_inode)->write_behind_rc = wbrc; | |
1da177e4 LT |
1499 | } |
1500 | if (invalidate_inode) { | |
3abb9272 SF |
1501 | /* shrink_dcache not necessary now that cifs dentry ops |
1502 | are exported for negative dentries */ | |
fb8c4b14 | 1503 | /* if (S_ISDIR(direntry->d_inode->i_mode)) |
3abb9272 SF |
1504 | shrink_dcache_parent(direntry); */ |
1505 | if (S_ISREG(direntry->d_inode->i_mode)) { | |
9e96af85 | 1506 | if (direntry->d_inode->i_mapping) { |
cea21805 JL |
1507 | wbrc = filemap_fdatawait(direntry->d_inode->i_mapping); |
1508 | if (wbrc) | |
1509 | CIFS_I(direntry->d_inode)->write_behind_rc = wbrc; | |
9e96af85 | 1510 | } |
3abb9272 SF |
1511 | /* may eventually have to do this for open files too */ |
1512 | if (list_empty(&(cifsInode->openFileList))) { | |
1513 | /* changed on server - flush read ahead pages */ | |
1514 | cFYI(1, ("Invalidating read ahead data on " | |
1515 | "closed file")); | |
1516 | invalidate_remote_inode(direntry->d_inode); | |
1517 | } | |
1da177e4 LT |
1518 | } |
1519 | } | |
1b1dcc1b | 1520 | /* mutex_unlock(&direntry->d_inode->i_mutex); */ |
50c2f753 | 1521 | |
1da177e4 LT |
1522 | kfree(full_path); |
1523 | FreeXid(xid); | |
1524 | return rc; | |
1525 | } | |
1526 | ||
1527 | int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
1528 | struct kstat *stat) | |
1529 | { | |
1530 | int err = cifs_revalidate(dentry); | |
5fe14c85 | 1531 | if (!err) { |
1da177e4 | 1532 | generic_fillattr(dentry->d_inode, stat); |
5fe14c85 | 1533 | stat->blksize = CIFS_MAX_MSGSIZE; |
cc0bad75 | 1534 | stat->ino = CIFS_I(dentry->d_inode)->uniqueid; |
5fe14c85 | 1535 | } |
1da177e4 LT |
1536 | return err; |
1537 | } | |
1538 | ||
1539 | static int cifs_truncate_page(struct address_space *mapping, loff_t from) | |
1540 | { | |
1541 | pgoff_t index = from >> PAGE_CACHE_SHIFT; | |
1542 | unsigned offset = from & (PAGE_CACHE_SIZE - 1); | |
1543 | struct page *page; | |
1da177e4 LT |
1544 | int rc = 0; |
1545 | ||
1546 | page = grab_cache_page(mapping, index); | |
1547 | if (!page) | |
1548 | return -ENOMEM; | |
1549 | ||
eebd2aa3 | 1550 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); |
1da177e4 LT |
1551 | unlock_page(page); |
1552 | page_cache_release(page); | |
1553 | return rc; | |
1554 | } | |
1555 | ||
fb8c4b14 | 1556 | static int cifs_vmtruncate(struct inode *inode, loff_t offset) |
3677db10 | 1557 | { |
c08d3b0e | 1558 | loff_t oldsize; |
1559 | int err; | |
3677db10 | 1560 | |
ba6a46a0 | 1561 | spin_lock(&inode->i_lock); |
c08d3b0e | 1562 | err = inode_newsize_ok(inode, offset); |
1563 | if (err) { | |
ba6a46a0 | 1564 | spin_unlock(&inode->i_lock); |
c08d3b0e | 1565 | goto out; |
ba6a46a0 | 1566 | } |
c08d3b0e | 1567 | |
1568 | oldsize = inode->i_size; | |
3677db10 | 1569 | i_size_write(inode, offset); |
ba6a46a0 | 1570 | spin_unlock(&inode->i_lock); |
c08d3b0e | 1571 | truncate_pagecache(inode, oldsize, offset); |
acfa4380 | 1572 | if (inode->i_op->truncate) |
3677db10 | 1573 | inode->i_op->truncate(inode); |
c08d3b0e | 1574 | out: |
1575 | return err; | |
3677db10 SF |
1576 | } |
1577 | ||
8efdbde6 JL |
1578 | static int |
1579 | cifs_set_file_size(struct inode *inode, struct iattr *attrs, | |
1580 | int xid, char *full_path) | |
1581 | { | |
1582 | int rc; | |
1583 | struct cifsFileInfo *open_file; | |
1584 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); | |
1585 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
1586 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
1587 | ||
1588 | /* | |
1589 | * To avoid spurious oplock breaks from server, in the case of | |
1590 | * inodes that we already have open, avoid doing path based | |
1591 | * setting of file size if we can do it by handle. | |
1592 | * This keeps our caching token (oplock) and avoids timeouts | |
1593 | * when the local oplock break takes longer to flush | |
1594 | * writebehind data than the SMB timeout for the SetPathInfo | |
1595 | * request would allow | |
1596 | */ | |
1597 | open_file = find_writable_file(cifsInode); | |
1598 | if (open_file) { | |
1599 | __u16 nfid = open_file->netfid; | |
1600 | __u32 npid = open_file->pid; | |
1601 | rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size, nfid, | |
1602 | npid, false); | |
6ab409b5 | 1603 | cifsFileInfo_put(open_file); |
8efdbde6 JL |
1604 | cFYI(1, ("SetFSize for attrs rc = %d", rc)); |
1605 | if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { | |
1606 | unsigned int bytes_written; | |
1607 | rc = CIFSSMBWrite(xid, pTcon, nfid, 0, attrs->ia_size, | |
1608 | &bytes_written, NULL, NULL, 1); | |
1609 | cFYI(1, ("Wrt seteof rc %d", rc)); | |
1610 | } | |
1611 | } else | |
1612 | rc = -EINVAL; | |
1613 | ||
1614 | if (rc != 0) { | |
1615 | /* Set file size by pathname rather than by handle | |
1616 | either because no valid, writeable file handle for | |
1617 | it was found or because there was an error setting | |
1618 | it by handle */ | |
1619 | rc = CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, | |
1620 | false, cifs_sb->local_nls, | |
1621 | cifs_sb->mnt_cifs_flags & | |
1622 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1623 | cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc)); | |
1624 | if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { | |
1625 | __u16 netfid; | |
1626 | int oplock = 0; | |
1627 | ||
1628 | rc = SMBLegacyOpen(xid, pTcon, full_path, | |
1629 | FILE_OPEN, GENERIC_WRITE, | |
1630 | CREATE_NOT_DIR, &netfid, &oplock, NULL, | |
1631 | cifs_sb->local_nls, | |
1632 | cifs_sb->mnt_cifs_flags & | |
1633 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1634 | if (rc == 0) { | |
1635 | unsigned int bytes_written; | |
1636 | rc = CIFSSMBWrite(xid, pTcon, netfid, 0, | |
1637 | attrs->ia_size, | |
1638 | &bytes_written, NULL, | |
1639 | NULL, 1); | |
1640 | cFYI(1, ("wrt seteof rc %d", rc)); | |
1641 | CIFSSMBClose(xid, pTcon, netfid); | |
1642 | } | |
1643 | } | |
1644 | } | |
1645 | ||
1646 | if (rc == 0) { | |
fbec9ab9 | 1647 | cifsInode->server_eof = attrs->ia_size; |
8efdbde6 JL |
1648 | rc = cifs_vmtruncate(inode, attrs->ia_size); |
1649 | cifs_truncate_page(inode->i_mapping, inode->i_size); | |
1650 | } | |
1651 | ||
1652 | return rc; | |
1653 | } | |
1654 | ||
3fe5c1dd JL |
1655 | static int |
1656 | cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs) | |
1657 | { | |
1658 | int rc; | |
1659 | int xid; | |
1660 | char *full_path = NULL; | |
1661 | struct inode *inode = direntry->d_inode; | |
1662 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); | |
1663 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
1664 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
1665 | struct cifs_unix_set_info_args *args = NULL; | |
3bbeeb3c | 1666 | struct cifsFileInfo *open_file; |
3fe5c1dd JL |
1667 | |
1668 | cFYI(1, ("setattr_unix on file %s attrs->ia_valid=0x%x", | |
1669 | direntry->d_name.name, attrs->ia_valid)); | |
1670 | ||
1671 | xid = GetXid(); | |
1672 | ||
1673 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) { | |
1674 | /* check if we have permission to change attrs */ | |
1675 | rc = inode_change_ok(inode, attrs); | |
1676 | if (rc < 0) | |
1677 | goto out; | |
1678 | else | |
1679 | rc = 0; | |
1680 | } | |
1681 | ||
1682 | full_path = build_path_from_dentry(direntry); | |
1683 | if (full_path == NULL) { | |
1684 | rc = -ENOMEM; | |
1685 | goto out; | |
1686 | } | |
1687 | ||
0f4d634c JL |
1688 | /* |
1689 | * Attempt to flush data before changing attributes. We need to do | |
1690 | * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the | |
1691 | * ownership or mode then we may also need to do this. Here, we take | |
1692 | * the safe way out and just do the flush on all setattr requests. If | |
1693 | * the flush returns error, store it to report later and continue. | |
1694 | * | |
1695 | * BB: This should be smarter. Why bother flushing pages that | |
1696 | * will be truncated anyway? Also, should we error out here if | |
1697 | * the flush returns error? | |
1698 | */ | |
1699 | rc = filemap_write_and_wait(inode->i_mapping); | |
1700 | if (rc != 0) { | |
1701 | cifsInode->write_behind_rc = rc; | |
1702 | rc = 0; | |
3fe5c1dd JL |
1703 | } |
1704 | ||
1705 | if (attrs->ia_valid & ATTR_SIZE) { | |
1706 | rc = cifs_set_file_size(inode, attrs, xid, full_path); | |
1707 | if (rc != 0) | |
1708 | goto out; | |
1709 | } | |
1710 | ||
1711 | /* skip mode change if it's just for clearing setuid/setgid */ | |
1712 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) | |
1713 | attrs->ia_valid &= ~ATTR_MODE; | |
1714 | ||
1715 | args = kmalloc(sizeof(*args), GFP_KERNEL); | |
1716 | if (args == NULL) { | |
1717 | rc = -ENOMEM; | |
1718 | goto out; | |
1719 | } | |
1720 | ||
1721 | /* set up the struct */ | |
1722 | if (attrs->ia_valid & ATTR_MODE) | |
1723 | args->mode = attrs->ia_mode; | |
1724 | else | |
1725 | args->mode = NO_CHANGE_64; | |
1726 | ||
1727 | if (attrs->ia_valid & ATTR_UID) | |
1728 | args->uid = attrs->ia_uid; | |
1729 | else | |
1730 | args->uid = NO_CHANGE_64; | |
1731 | ||
1732 | if (attrs->ia_valid & ATTR_GID) | |
1733 | args->gid = attrs->ia_gid; | |
1734 | else | |
1735 | args->gid = NO_CHANGE_64; | |
1736 | ||
1737 | if (attrs->ia_valid & ATTR_ATIME) | |
1738 | args->atime = cifs_UnixTimeToNT(attrs->ia_atime); | |
1739 | else | |
1740 | args->atime = NO_CHANGE_64; | |
1741 | ||
1742 | if (attrs->ia_valid & ATTR_MTIME) | |
1743 | args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime); | |
1744 | else | |
1745 | args->mtime = NO_CHANGE_64; | |
1746 | ||
1747 | if (attrs->ia_valid & ATTR_CTIME) | |
1748 | args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime); | |
1749 | else | |
1750 | args->ctime = NO_CHANGE_64; | |
1751 | ||
1752 | args->device = 0; | |
3bbeeb3c JL |
1753 | open_file = find_writable_file(cifsInode); |
1754 | if (open_file) { | |
1755 | u16 nfid = open_file->netfid; | |
1756 | u32 npid = open_file->pid; | |
1757 | rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid); | |
6ab409b5 | 1758 | cifsFileInfo_put(open_file); |
3bbeeb3c JL |
1759 | } else { |
1760 | rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args, | |
01ea95e3 JL |
1761 | cifs_sb->local_nls, |
1762 | cifs_sb->mnt_cifs_flags & | |
1763 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
3bbeeb3c | 1764 | } |
3fe5c1dd | 1765 | |
ccd4bb1b | 1766 | if (!rc) { |
3fe5c1dd | 1767 | rc = inode_setattr(inode, attrs); |
ccd4bb1b SF |
1768 | |
1769 | /* force revalidate when any of these times are set since some | |
1770 | of the fs types (eg ext3, fat) do not have fine enough | |
1771 | time granularity to match protocol, and we do not have a | |
1772 | a way (yet) to query the server fs's time granularity (and | |
1773 | whether it rounds times down). | |
1774 | */ | |
1775 | if (!rc && (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME))) | |
1776 | cifsInode->time = 0; | |
1777 | } | |
3fe5c1dd JL |
1778 | out: |
1779 | kfree(args); | |
1780 | kfree(full_path); | |
1781 | FreeXid(xid); | |
1782 | return rc; | |
1783 | } | |
1784 | ||
0510eeb7 JL |
1785 | static int |
1786 | cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs) | |
1da177e4 LT |
1787 | { |
1788 | int xid; | |
3fe5c1dd JL |
1789 | struct inode *inode = direntry->d_inode; |
1790 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
3fe5c1dd | 1791 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
1da177e4 LT |
1792 | char *full_path = NULL; |
1793 | int rc = -EACCES; | |
feb3e20c | 1794 | __u32 dosattr = 0; |
4e1e7fb9 | 1795 | __u64 mode = NO_CHANGE_64; |
3fe5c1dd | 1796 | |
1da177e4 LT |
1797 | xid = GetXid(); |
1798 | ||
3979877e | 1799 | cFYI(1, ("setattr on file %s attrs->iavalid 0x%x", |
1da177e4 | 1800 | direntry->d_name.name, attrs->ia_valid)); |
6473a559 | 1801 | |
2a138ebb | 1802 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) { |
6473a559 | 1803 | /* check if we have permission to change attrs */ |
02eadeff | 1804 | rc = inode_change_ok(inode, attrs); |
fb8c4b14 | 1805 | if (rc < 0) { |
6473a559 SF |
1806 | FreeXid(xid); |
1807 | return rc; | |
1808 | } else | |
1809 | rc = 0; | |
1810 | } | |
50c2f753 | 1811 | |
7f57356b | 1812 | full_path = build_path_from_dentry(direntry); |
1da177e4 | 1813 | if (full_path == NULL) { |
0f3bc09e | 1814 | rc = -ENOMEM; |
1da177e4 | 1815 | FreeXid(xid); |
0f3bc09e | 1816 | return rc; |
1da177e4 | 1817 | } |
1da177e4 | 1818 | |
0f4d634c JL |
1819 | /* |
1820 | * Attempt to flush data before changing attributes. We need to do | |
1821 | * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the | |
1822 | * ownership or mode then we may also need to do this. Here, we take | |
1823 | * the safe way out and just do the flush on all setattr requests. If | |
1824 | * the flush returns error, store it to report later and continue. | |
1825 | * | |
1826 | * BB: This should be smarter. Why bother flushing pages that | |
1827 | * will be truncated anyway? Also, should we error out here if | |
1828 | * the flush returns error? | |
1829 | */ | |
1830 | rc = filemap_write_and_wait(inode->i_mapping); | |
1831 | if (rc != 0) { | |
1832 | cifsInode->write_behind_rc = rc; | |
1833 | rc = 0; | |
50531444 | 1834 | } |
cea21805 | 1835 | |
50531444 | 1836 | if (attrs->ia_valid & ATTR_SIZE) { |
8efdbde6 JL |
1837 | rc = cifs_set_file_size(inode, attrs, xid, full_path); |
1838 | if (rc != 0) | |
e30dcf3a | 1839 | goto cifs_setattr_exit; |
1da177e4 | 1840 | } |
4ca691a8 JL |
1841 | |
1842 | /* | |
1843 | * Without unix extensions we can't send ownership changes to the | |
1844 | * server, so silently ignore them. This is consistent with how | |
1845 | * local DOS/Windows filesystems behave (VFAT, NTFS, etc). With | |
1846 | * CIFSACL support + proper Windows to Unix idmapping, we may be | |
1847 | * able to support this in the future. | |
1848 | */ | |
3fe5c1dd | 1849 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) |
4ca691a8 | 1850 | attrs->ia_valid &= ~(ATTR_UID | ATTR_GID); |
1da177e4 | 1851 | |
d32c4f26 JL |
1852 | /* skip mode change if it's just for clearing setuid/setgid */ |
1853 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) | |
1854 | attrs->ia_valid &= ~ATTR_MODE; | |
1855 | ||
1da177e4 | 1856 | if (attrs->ia_valid & ATTR_MODE) { |
5132861a | 1857 | cFYI(1, ("Mode changed to 0%o", attrs->ia_mode)); |
1da177e4 | 1858 | mode = attrs->ia_mode; |
1da177e4 LT |
1859 | } |
1860 | ||
3fe5c1dd | 1861 | if (attrs->ia_valid & ATTR_MODE) { |
cdbce9c8 | 1862 | rc = 0; |
97837582 SF |
1863 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
1864 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) | |
02eadeff | 1865 | rc = mode_to_acl(inode, full_path, mode); |
5132861a | 1866 | else |
97837582 | 1867 | #endif |
5132861a JL |
1868 | if (((mode & S_IWUGO) == 0) && |
1869 | (cifsInode->cifsAttrs & ATTR_READONLY) == 0) { | |
feb3e20c JL |
1870 | |
1871 | dosattr = cifsInode->cifsAttrs | ATTR_READONLY; | |
1872 | ||
5132861a JL |
1873 | /* fix up mode if we're not using dynperm */ |
1874 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0) | |
1875 | attrs->ia_mode = inode->i_mode & ~S_IWUGO; | |
1876 | } else if ((mode & S_IWUGO) && | |
1877 | (cifsInode->cifsAttrs & ATTR_READONLY)) { | |
feb3e20c JL |
1878 | |
1879 | dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY; | |
1880 | /* Attributes of 0 are ignored */ | |
1881 | if (dosattr == 0) | |
1882 | dosattr |= ATTR_NORMAL; | |
5132861a JL |
1883 | |
1884 | /* reset local inode permissions to normal */ | |
1885 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { | |
1886 | attrs->ia_mode &= ~(S_IALLUGO); | |
1887 | if (S_ISDIR(inode->i_mode)) | |
1888 | attrs->ia_mode |= | |
1889 | cifs_sb->mnt_dir_mode; | |
1890 | else | |
1891 | attrs->ia_mode |= | |
1892 | cifs_sb->mnt_file_mode; | |
1893 | } | |
1894 | } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { | |
1895 | /* ignore mode change - ATTR_READONLY hasn't changed */ | |
1896 | attrs->ia_valid &= ~ATTR_MODE; | |
1da177e4 | 1897 | } |
1da177e4 LT |
1898 | } |
1899 | ||
feb3e20c JL |
1900 | if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) || |
1901 | ((attrs->ia_valid & ATTR_MODE) && dosattr)) { | |
1902 | rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); | |
1903 | /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */ | |
1da177e4 | 1904 | |
e30dcf3a SF |
1905 | /* Even if error on time set, no sense failing the call if |
1906 | the server would set the time to a reasonable value anyway, | |
1907 | and this check ensures that we are not being called from | |
1908 | sys_utimes in which case we ought to fail the call back to | |
1909 | the user when the server rejects the call */ | |
fb8c4b14 | 1910 | if ((rc) && (attrs->ia_valid & |
feb3e20c | 1911 | (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE))) |
e30dcf3a | 1912 | rc = 0; |
1da177e4 LT |
1913 | } |
1914 | ||
1915 | /* do not need local check to inode_check_ok since the server does | |
1916 | that */ | |
1917 | if (!rc) | |
02eadeff | 1918 | rc = inode_setattr(inode, attrs); |
e30dcf3a | 1919 | cifs_setattr_exit: |
1da177e4 LT |
1920 | kfree(full_path); |
1921 | FreeXid(xid); | |
1922 | return rc; | |
1923 | } | |
1924 | ||
0510eeb7 JL |
1925 | int |
1926 | cifs_setattr(struct dentry *direntry, struct iattr *attrs) | |
1927 | { | |
1928 | struct inode *inode = direntry->d_inode; | |
1929 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
1930 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
1931 | ||
1932 | if (pTcon->unix_ext) | |
1933 | return cifs_setattr_unix(direntry, attrs); | |
1934 | ||
1935 | return cifs_setattr_nounix(direntry, attrs); | |
1936 | ||
1937 | /* BB: add cifs_setattr_legacy for really old servers */ | |
1938 | } | |
1939 | ||
99ee4dbd | 1940 | #if 0 |
1da177e4 LT |
1941 | void cifs_delete_inode(struct inode *inode) |
1942 | { | |
26a21b98 | 1943 | cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode)); |
1da177e4 LT |
1944 | /* may have to add back in if and when safe distributed caching of |
1945 | directories added e.g. via FindNotify */ | |
1946 | } | |
99ee4dbd | 1947 | #endif |