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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: | |
bc5b6e24 | 60 | #ifdef CONFIG_CIFS_DFS_UPCALL |
7962670e IM |
61 | if (is_dfs_referral) { |
62 | inode->i_op = &cifs_dfs_referral_inode_operations; | |
63 | } else { | |
bc5b6e24 SF |
64 | #else /* NO DFS support, treat as a directory */ |
65 | { | |
66 | #endif | |
7962670e IM |
67 | inode->i_op = &cifs_dir_inode_ops; |
68 | inode->i_fop = &cifs_dir_ops; | |
69 | } | |
70eff55d CH |
70 | break; |
71 | case S_IFLNK: | |
72 | inode->i_op = &cifs_symlink_inode_ops; | |
73 | break; | |
74 | default: | |
75 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
76 | break; | |
77 | } | |
78 | } | |
79 | ||
75f12983 CH |
80 | static void cifs_unix_info_to_inode(struct inode *inode, |
81 | FILE_UNIX_BASIC_INFO *info, int force_uid_gid) | |
82 | { | |
83 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
84 | struct cifsInodeInfo *cifsInfo = CIFS_I(inode); | |
85 | __u64 num_of_bytes = le64_to_cpu(info->NumOfBytes); | |
86 | __u64 end_of_file = le64_to_cpu(info->EndOfFile); | |
87 | ||
88 | inode->i_atime = cifs_NTtimeToUnix(le64_to_cpu(info->LastAccessTime)); | |
89 | inode->i_mtime = | |
90 | cifs_NTtimeToUnix(le64_to_cpu(info->LastModificationTime)); | |
91 | inode->i_ctime = cifs_NTtimeToUnix(le64_to_cpu(info->LastStatusChange)); | |
92 | inode->i_mode = le64_to_cpu(info->Permissions); | |
93 | ||
94 | /* | |
95 | * Since we set the inode type below we need to mask off | |
96 | * to avoid strange results if bits set above. | |
97 | */ | |
98 | inode->i_mode &= ~S_IFMT; | |
99 | switch (le32_to_cpu(info->Type)) { | |
100 | case UNIX_FILE: | |
101 | inode->i_mode |= S_IFREG; | |
102 | break; | |
103 | case UNIX_SYMLINK: | |
104 | inode->i_mode |= S_IFLNK; | |
105 | break; | |
106 | case UNIX_DIR: | |
107 | inode->i_mode |= S_IFDIR; | |
108 | break; | |
109 | case UNIX_CHARDEV: | |
110 | inode->i_mode |= S_IFCHR; | |
111 | inode->i_rdev = MKDEV(le64_to_cpu(info->DevMajor), | |
112 | le64_to_cpu(info->DevMinor) & MINORMASK); | |
113 | break; | |
114 | case UNIX_BLOCKDEV: | |
115 | inode->i_mode |= S_IFBLK; | |
116 | inode->i_rdev = MKDEV(le64_to_cpu(info->DevMajor), | |
117 | le64_to_cpu(info->DevMinor) & MINORMASK); | |
118 | break; | |
119 | case UNIX_FIFO: | |
120 | inode->i_mode |= S_IFIFO; | |
121 | break; | |
122 | case UNIX_SOCKET: | |
123 | inode->i_mode |= S_IFSOCK; | |
124 | break; | |
125 | default: | |
126 | /* safest to call it a file if we do not know */ | |
127 | inode->i_mode |= S_IFREG; | |
128 | cFYI(1, ("unknown type %d", le32_to_cpu(info->Type))); | |
129 | break; | |
130 | } | |
131 | ||
132 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) && | |
133 | !force_uid_gid) | |
134 | inode->i_uid = cifs_sb->mnt_uid; | |
135 | else | |
136 | inode->i_uid = le64_to_cpu(info->Uid); | |
137 | ||
138 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) && | |
139 | !force_uid_gid) | |
140 | inode->i_gid = cifs_sb->mnt_gid; | |
141 | else | |
142 | inode->i_gid = le64_to_cpu(info->Gid); | |
143 | ||
144 | inode->i_nlink = le64_to_cpu(info->Nlinks); | |
145 | ||
146 | spin_lock(&inode->i_lock); | |
147 | if (is_size_safe_to_change(cifsInfo, end_of_file)) { | |
148 | /* | |
149 | * We can not safely change the file size here if the client | |
150 | * is writing to it due to potential races. | |
151 | */ | |
152 | i_size_write(inode, end_of_file); | |
153 | ||
154 | /* | |
155 | * i_blocks is not related to (i_size / i_blksize), | |
156 | * but instead 512 byte (2**9) size is required for | |
157 | * calculating num blocks. | |
158 | */ | |
159 | inode->i_blocks = (512 - 1 + num_of_bytes) >> 9; | |
160 | } | |
161 | spin_unlock(&inode->i_lock); | |
162 | } | |
163 | ||
b9a3260f SF |
164 | |
165 | /* | |
166 | * Needed to setup inode data for the directory which is the | |
167 | * junction to the new submount (ie to setup the fake directory | |
168 | * which represents a DFS referral) | |
169 | */ | |
0e4bbde9 SF |
170 | static void fill_fake_finddataunix(FILE_UNIX_BASIC_INFO *pfnd_dat, |
171 | struct super_block *sb) | |
172 | { | |
173 | struct inode *pinode = NULL; | |
174 | ||
175 | memset(pfnd_dat, sizeof(FILE_UNIX_BASIC_INFO), 0); | |
176 | ||
177 | /* __le64 pfnd_dat->EndOfFile = cpu_to_le64(0); | |
178 | __le64 pfnd_dat->NumOfBytes = cpu_to_le64(0); | |
179 | __u64 UniqueId = 0; */ | |
180 | pfnd_dat->LastStatusChange = | |
181 | cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); | |
182 | pfnd_dat->LastAccessTime = | |
183 | cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); | |
184 | pfnd_dat->LastModificationTime = | |
185 | cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); | |
186 | pfnd_dat->Type = cpu_to_le32(UNIX_DIR); | |
187 | pfnd_dat->Permissions = cpu_to_le64(S_IXUGO | S_IRWXU); | |
188 | pfnd_dat->Nlinks = cpu_to_le64(2); | |
189 | if (sb->s_root) | |
190 | pinode = sb->s_root->d_inode; | |
191 | if (pinode == NULL) | |
192 | return; | |
193 | ||
194 | /* fill in default values for the remaining based on root | |
195 | inode since we can not query the server for this inode info */ | |
196 | pfnd_dat->DevMajor = cpu_to_le64(MAJOR(pinode->i_rdev)); | |
197 | pfnd_dat->DevMinor = cpu_to_le64(MINOR(pinode->i_rdev)); | |
198 | pfnd_dat->Uid = cpu_to_le64(pinode->i_uid); | |
199 | pfnd_dat->Gid = cpu_to_le64(pinode->i_gid); | |
200 | } | |
201 | ||
1da177e4 | 202 | int cifs_get_inode_info_unix(struct inode **pinode, |
646dd539 | 203 | const unsigned char *full_path, struct super_block *sb, int xid) |
1da177e4 LT |
204 | { |
205 | int rc = 0; | |
0e4bbde9 | 206 | FILE_UNIX_BASIC_INFO find_data; |
1da177e4 LT |
207 | struct cifsTconInfo *pTcon; |
208 | struct inode *inode; | |
209 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
7962670e | 210 | bool is_dfs_referral = false; |
0e4bbde9 SF |
211 | struct cifsInodeInfo *cifsInfo; |
212 | __u64 num_of_bytes; | |
213 | __u64 end_of_file; | |
1da177e4 LT |
214 | |
215 | pTcon = cifs_sb->tcon; | |
646dd539 | 216 | cFYI(1, ("Getting info on %s", full_path)); |
7962670e | 217 | |
1da177e4 | 218 | /* could have done a find first instead but this returns more info */ |
0e4bbde9 | 219 | rc = CIFSSMBUnixQPathInfo(xid, pTcon, full_path, &find_data, |
737b758c SF |
220 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
221 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 | 222 | if (rc) { |
7962670e IM |
223 | if (rc == -EREMOTE && !is_dfs_referral) { |
224 | is_dfs_referral = true; | |
397d71dd | 225 | cFYI(DBG2, ("DFS ref")); |
0e4bbde9 SF |
226 | /* for DFS, server does not give us real inode data */ |
227 | fill_fake_finddataunix(&find_data, sb); | |
228 | rc = 0; | |
1da177e4 | 229 | } |
0e4bbde9 SF |
230 | } |
231 | num_of_bytes = le64_to_cpu(find_data.NumOfBytes); | |
232 | end_of_file = le64_to_cpu(find_data.EndOfFile); | |
1da177e4 | 233 | |
0e4bbde9 SF |
234 | /* get new inode */ |
235 | if (*pinode == NULL) { | |
236 | *pinode = new_inode(sb); | |
1da177e4 | 237 | if (*pinode == NULL) { |
0e4bbde9 SF |
238 | rc = -ENOMEM; |
239 | goto cgiiu_exit; | |
1da177e4 | 240 | } |
0e4bbde9 SF |
241 | /* Is an i_ino of zero legal? */ |
242 | /* note ino incremented to unique num in new_inode */ | |
243 | /* Are there sanity checks we can use to ensure that | |
244 | the server is really filling in that field? */ | |
245 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
246 | (*pinode)->i_ino = (unsigned long)find_data.UniqueId; | |
1da177e4 | 247 | |
0e4bbde9 SF |
248 | if (sb->s_flags & MS_NOATIME) |
249 | (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME; | |
1da177e4 | 250 | |
0e4bbde9 SF |
251 | insert_inode_hash(*pinode); |
252 | } | |
1da177e4 | 253 | |
0e4bbde9 SF |
254 | inode = *pinode; |
255 | cifsInfo = CIFS_I(inode); | |
1da177e4 | 256 | |
0e4bbde9 SF |
257 | cFYI(1, ("Old time %ld", cifsInfo->time)); |
258 | cifsInfo->time = jiffies; | |
259 | cFYI(1, ("New time %ld", cifsInfo->time)); | |
260 | /* this is ok to set on every inode revalidate */ | |
261 | atomic_set(&cifsInfo->inUse, 1); | |
1da177e4 | 262 | |
0e4bbde9 | 263 | cifs_unix_info_to_inode(inode, &find_data, 0); |
70eff55d | 264 | |
0e4bbde9 SF |
265 | if (num_of_bytes < end_of_file) |
266 | cFYI(1, ("allocation size less than end of file")); | |
267 | cFYI(1, ("Size %ld and blocks %llu", | |
268 | (unsigned long) inode->i_size, | |
269 | (unsigned long long)inode->i_blocks)); | |
270 | ||
271 | cifs_set_ops(inode, is_dfs_referral); | |
7962670e | 272 | cgiiu_exit: |
1da177e4 LT |
273 | return rc; |
274 | } | |
275 | ||
fb8c4b14 | 276 | static int decode_sfu_inode(struct inode *inode, __u64 size, |
d6e2f2a4 SF |
277 | const unsigned char *path, |
278 | struct cifs_sb_info *cifs_sb, int xid) | |
279 | { | |
280 | int rc; | |
4b18f2a9 | 281 | int oplock = 0; |
d6e2f2a4 SF |
282 | __u16 netfid; |
283 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
86c96b4b | 284 | char buf[24]; |
d6e2f2a4 | 285 | unsigned int bytes_read; |
fb8c4b14 | 286 | char *pbuf; |
d6e2f2a4 SF |
287 | |
288 | pbuf = buf; | |
289 | ||
4523cc30 | 290 | if (size == 0) { |
d6e2f2a4 SF |
291 | inode->i_mode |= S_IFIFO; |
292 | return 0; | |
293 | } else if (size < 8) { | |
294 | return -EINVAL; /* EOPNOTSUPP? */ | |
295 | } | |
50c2f753 | 296 | |
d6e2f2a4 SF |
297 | rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ, |
298 | CREATE_NOT_DIR, &netfid, &oplock, NULL, | |
299 | cifs_sb->local_nls, | |
300 | cifs_sb->mnt_cifs_flags & | |
301 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
fb8c4b14 | 302 | if (rc == 0) { |
ec637e3f | 303 | int buf_type = CIFS_NO_BUFFER; |
d6e2f2a4 SF |
304 | /* Read header */ |
305 | rc = CIFSSMBRead(xid, pTcon, | |
fb8c4b14 | 306 | netfid, |
86c96b4b | 307 | 24 /* length */, 0 /* offset */, |
ec637e3f | 308 | &bytes_read, &pbuf, &buf_type); |
4523cc30 SF |
309 | if ((rc == 0) && (bytes_read >= 8)) { |
310 | if (memcmp("IntxBLK", pbuf, 8) == 0) { | |
fb8c4b14 | 311 | cFYI(1, ("Block device")); |
3020a1f5 | 312 | inode->i_mode |= S_IFBLK; |
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); | |
320 | } | |
4523cc30 | 321 | } else if (memcmp("IntxCHR", pbuf, 8) == 0) { |
fb8c4b14 | 322 | cFYI(1, ("Char device")); |
3020a1f5 | 323 | inode->i_mode |= S_IFCHR; |
4523cc30 | 324 | if (bytes_read == 24) { |
86c96b4b SF |
325 | /* we have enough to decode dev num */ |
326 | __u64 mjr; /* major */ | |
327 | __u64 mnr; /* minor */ | |
328 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); | |
329 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); | |
330 | inode->i_rdev = MKDEV(mjr, mnr); | |
fb8c4b14 | 331 | } |
4523cc30 | 332 | } else if (memcmp("IntxLNK", pbuf, 7) == 0) { |
fb8c4b14 | 333 | cFYI(1, ("Symlink")); |
3020a1f5 | 334 | inode->i_mode |= S_IFLNK; |
86c96b4b SF |
335 | } else { |
336 | inode->i_mode |= S_IFREG; /* file? */ | |
fb8c4b14 | 337 | rc = -EOPNOTSUPP; |
86c96b4b | 338 | } |
3020a1f5 SF |
339 | } else { |
340 | inode->i_mode |= S_IFREG; /* then it is a file */ | |
fb8c4b14 SF |
341 | rc = -EOPNOTSUPP; /* or some unknown SFU type */ |
342 | } | |
d6e2f2a4 | 343 | CIFSSMBClose(xid, pTcon, netfid); |
d6e2f2a4 SF |
344 | } |
345 | return rc; | |
d6e2f2a4 SF |
346 | } |
347 | ||
9e294f1c SF |
348 | #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */ |
349 | ||
953f8681 | 350 | static int get_sfu_mode(struct inode *inode, |
9e294f1c SF |
351 | const unsigned char *path, |
352 | struct cifs_sb_info *cifs_sb, int xid) | |
353 | { | |
3020a1f5 | 354 | #ifdef CONFIG_CIFS_XATTR |
9e294f1c SF |
355 | ssize_t rc; |
356 | char ea_value[4]; | |
357 | __u32 mode; | |
358 | ||
359 | rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS", | |
360 | ea_value, 4 /* size of buf */, cifs_sb->local_nls, | |
fb8c4b14 | 361 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
4523cc30 | 362 | if (rc < 0) |
9e294f1c SF |
363 | return (int)rc; |
364 | else if (rc > 3) { | |
365 | mode = le32_to_cpu(*((__le32 *)ea_value)); | |
fb8c4b14 SF |
366 | inode->i_mode &= ~SFBITS_MASK; |
367 | cFYI(1, ("special bits 0%o org mode 0%o", mode, inode->i_mode)); | |
9e294f1c | 368 | inode->i_mode = (mode & SFBITS_MASK) | inode->i_mode; |
fb8c4b14 | 369 | cFYI(1, ("special mode bits 0%o", mode)); |
9e294f1c SF |
370 | return 0; |
371 | } else { | |
372 | return 0; | |
373 | } | |
3020a1f5 SF |
374 | #else |
375 | return -EOPNOTSUPP; | |
376 | #endif | |
9e294f1c SF |
377 | } |
378 | ||
b9a3260f SF |
379 | /* |
380 | * Needed to setup inode data for the directory which is the | |
381 | * junction to the new submount (ie to setup the fake directory | |
382 | * which represents a DFS referral) | |
383 | */ | |
384 | static void fill_fake_finddata(FILE_ALL_INFO *pfnd_dat, | |
385 | struct super_block *sb) | |
386 | { | |
387 | memset(pfnd_dat, sizeof(FILE_ALL_INFO), 0); | |
388 | ||
389 | /* __le64 pfnd_dat->AllocationSize = cpu_to_le64(0); | |
390 | __le64 pfnd_dat->EndOfFile = cpu_to_le64(0); | |
391 | __u8 pfnd_dat->DeletePending = 0; | |
392 | __u8 pfnd_data->Directory = 0; | |
393 | __le32 pfnd_dat->EASize = 0; | |
394 | __u64 pfnd_dat->IndexNumber = 0; | |
395 | __u64 pfnd_dat->IndexNumber1 = 0; */ | |
396 | pfnd_dat->CreationTime = | |
397 | cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); | |
398 | pfnd_dat->LastAccessTime = | |
399 | cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); | |
400 | pfnd_dat->LastWriteTime = | |
401 | cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); | |
402 | pfnd_dat->ChangeTime = | |
403 | cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); | |
404 | pfnd_dat->Attributes = cpu_to_le32(ATTR_DIRECTORY); | |
405 | pfnd_dat->NumberOfLinks = cpu_to_le32(2); | |
406 | } | |
407 | ||
1da177e4 | 408 | int cifs_get_inode_info(struct inode **pinode, |
646dd539 | 409 | const unsigned char *full_path, FILE_ALL_INFO *pfindData, |
8b1327f6 | 410 | struct super_block *sb, int xid, const __u16 *pfid) |
1da177e4 LT |
411 | { |
412 | int rc = 0; | |
b9a3260f SF |
413 | __u32 attr; |
414 | struct cifsInodeInfo *cifsInfo; | |
1da177e4 LT |
415 | struct cifsTconInfo *pTcon; |
416 | struct inode *inode; | |
417 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
1da177e4 | 418 | char *buf = NULL; |
5ade9dea | 419 | bool adjustTZ = false; |
7962670e | 420 | bool is_dfs_referral = false; |
1da177e4 LT |
421 | |
422 | pTcon = cifs_sb->tcon; | |
646dd539 | 423 | cFYI(1, ("Getting info on %s", full_path)); |
1da177e4 | 424 | |
d0d2f2df SF |
425 | if ((pfindData == NULL) && (*pinode != NULL)) { |
426 | if (CIFS_I(*pinode)->clientCanCacheRead) { | |
fb8c4b14 | 427 | cFYI(1, ("No need to revalidate cached inode sizes")); |
1da177e4 LT |
428 | return rc; |
429 | } | |
430 | } | |
431 | ||
432 | /* if file info not passed in then get it from server */ | |
d0d2f2df | 433 | if (pfindData == NULL) { |
1da177e4 | 434 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
d0d2f2df | 435 | if (buf == NULL) |
1da177e4 LT |
436 | return -ENOMEM; |
437 | pfindData = (FILE_ALL_INFO *)buf; | |
7962670e | 438 | |
1da177e4 | 439 | /* could do find first instead but this returns more info */ |
7962670e | 440 | rc = CIFSSMBQPathInfo(xid, pTcon, full_path, pfindData, |
acf1a1b1 | 441 | 0 /* not legacy */, |
6b8edfe0 | 442 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
737b758c | 443 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
6b8edfe0 SF |
444 | /* BB optimize code so we do not make the above call |
445 | when server claims no NT SMB support and the above call | |
446 | failed at least once - set flag in tcon or mount */ | |
4523cc30 | 447 | if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) { |
7962670e | 448 | rc = SMBQueryInformation(xid, pTcon, full_path, |
fb8c4b14 | 449 | pfindData, cifs_sb->local_nls, |
6b8edfe0 SF |
450 | cifs_sb->mnt_cifs_flags & |
451 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
4b18f2a9 | 452 | adjustTZ = true; |
6b8edfe0 | 453 | } |
1da177e4 LT |
454 | } |
455 | /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */ | |
b9a3260f SF |
456 | if (rc == -EREMOTE) { |
457 | is_dfs_referral = true; | |
458 | fill_fake_finddata(pfindData, sb); | |
459 | rc = 0; | |
460 | } else if (rc) | |
7962670e | 461 | goto cgii_exit; |
1da177e4 | 462 | |
b9a3260f SF |
463 | attr = le32_to_cpu(pfindData->Attributes); |
464 | ||
465 | /* get new inode */ | |
466 | if (*pinode == NULL) { | |
467 | *pinode = new_inode(sb); | |
1da177e4 | 468 | if (*pinode == NULL) { |
b9a3260f SF |
469 | rc = -ENOMEM; |
470 | goto cgii_exit; | |
471 | } | |
472 | /* Is an i_ino of zero legal? Can we use that to check | |
473 | if the server supports returning inode numbers? Are | |
474 | there other sanity checks we can use to ensure that | |
475 | the server is really filling in that field? */ | |
476 | ||
477 | /* We can not use the IndexNumber field by default from | |
478 | Windows or Samba (in ALL_INFO buf) but we can request | |
479 | it explicitly. It may not be unique presumably if | |
480 | the server has multiple devices mounted under one share */ | |
481 | ||
482 | /* There may be higher info levels that work but are | |
483 | there Windows server or network appliances for which | |
484 | IndexNumber field is not guaranteed unique? */ | |
485 | ||
486 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { | |
487 | int rc1 = 0; | |
488 | __u64 inode_num; | |
489 | ||
490 | rc1 = CIFSGetSrvInodeNumber(xid, pTcon, | |
646dd539 | 491 | full_path, &inode_num, |
737b758c SF |
492 | cifs_sb->local_nls, |
493 | cifs_sb->mnt_cifs_flags & | |
494 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
b9a3260f SF |
495 | if (rc1) { |
496 | cFYI(1, ("GetSrvInodeNum rc %d", rc1)); | |
497 | /* BB EOPNOSUPP disable SERVER_INUM? */ | |
498 | } else /* do we need cast or hash to ino? */ | |
499 | (*pinode)->i_ino = inode_num; | |
500 | } /* else ino incremented to unique num in new_inode*/ | |
501 | if (sb->s_flags & MS_NOATIME) | |
502 | (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME; | |
503 | insert_inode_hash(*pinode); | |
504 | } | |
505 | inode = *pinode; | |
506 | cifsInfo = CIFS_I(inode); | |
507 | cifsInfo->cifsAttrs = attr; | |
508 | cFYI(1, ("Old time %ld", cifsInfo->time)); | |
509 | cifsInfo->time = jiffies; | |
510 | cFYI(1, ("New time %ld", cifsInfo->time)); | |
511 | ||
512 | /* blksize needs to be multiple of two. So safer to default to | |
513 | blksize and blkbits set in superblock so 2**blkbits and blksize | |
514 | will match rather than setting to: | |
515 | (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/ | |
516 | ||
517 | /* Linux can not store file creation time so ignore it */ | |
518 | if (pfindData->LastAccessTime) | |
519 | inode->i_atime = cifs_NTtimeToUnix | |
520 | (le64_to_cpu(pfindData->LastAccessTime)); | |
521 | else /* do not need to use current_fs_time - time not stored */ | |
522 | inode->i_atime = CURRENT_TIME; | |
523 | inode->i_mtime = | |
1da177e4 | 524 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime)); |
b9a3260f SF |
525 | inode->i_ctime = |
526 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime)); | |
527 | cFYI(DBG2, ("Attributes came in as 0x%x", attr)); | |
528 | if (adjustTZ && (pTcon->ses) && (pTcon->ses->server)) { | |
529 | inode->i_ctime.tv_sec += pTcon->ses->server->timeAdj; | |
530 | inode->i_mtime.tv_sec += pTcon->ses->server->timeAdj; | |
531 | } | |
1da177e4 | 532 | |
b9a3260f SF |
533 | /* set default mode. will override for dirs below */ |
534 | if (atomic_read(&cifsInfo->inUse) == 0) | |
535 | /* new inode, can safely set these fields */ | |
536 | inode->i_mode = cifs_sb->mnt_file_mode; | |
537 | else /* since we set the inode type below we need to mask off | |
538 | to avoid strange results if type changes and both | |
539 | get orred in */ | |
540 | inode->i_mode &= ~S_IFMT; | |
541 | /* if (attr & ATTR_REPARSE) */ | |
542 | /* We no longer handle these as symlinks because we could not | |
543 | follow them due to the absolute path with drive letter */ | |
544 | if (attr & ATTR_DIRECTORY) { | |
545 | /* override default perms since we do not do byte range locking | |
546 | on dirs */ | |
547 | inode->i_mode = cifs_sb->mnt_dir_mode; | |
548 | inode->i_mode |= S_IFDIR; | |
549 | } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) && | |
550 | (cifsInfo->cifsAttrs & ATTR_SYSTEM) && | |
551 | /* No need to le64 convert size of zero */ | |
552 | (pfindData->EndOfFile == 0)) { | |
553 | inode->i_mode = cifs_sb->mnt_file_mode; | |
554 | inode->i_mode |= S_IFIFO; | |
d6e2f2a4 | 555 | /* BB Finish for SFU style symlinks and devices */ |
b9a3260f SF |
556 | } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) && |
557 | (cifsInfo->cifsAttrs & ATTR_SYSTEM)) { | |
558 | if (decode_sfu_inode(inode, le64_to_cpu(pfindData->EndOfFile), | |
559 | full_path, cifs_sb, xid)) | |
560 | cFYI(1, ("Unrecognized sfu inode type")); | |
50c2f753 | 561 | |
b9a3260f SF |
562 | cFYI(1, ("sfu mode 0%o", inode->i_mode)); |
563 | } else { | |
564 | inode->i_mode |= S_IFREG; | |
565 | /* treat dos attribute of read-only as read-only mode eg 555 */ | |
566 | if (cifsInfo->cifsAttrs & ATTR_READONLY) | |
567 | inode->i_mode &= ~(S_IWUGO); | |
568 | else if ((inode->i_mode & S_IWUGO) == 0) | |
569 | /* the ATTR_READONLY flag may have been */ | |
570 | /* changed on server -- set any w bits */ | |
571 | /* allowed by mnt_file_mode */ | |
572 | inode->i_mode |= (S_IWUGO & cifs_sb->mnt_file_mode); | |
573 | /* BB add code to validate if device or weird share or device type? */ | |
574 | } | |
575 | ||
576 | spin_lock(&inode->i_lock); | |
577 | if (is_size_safe_to_change(cifsInfo, | |
578 | le64_to_cpu(pfindData->EndOfFile))) { | |
579 | /* can not safely shrink the file size here if the | |
580 | client is writing to it due to potential races */ | |
581 | i_size_write(inode, le64_to_cpu(pfindData->EndOfFile)); | |
582 | ||
583 | /* 512 bytes (2**9) is the fake blocksize that must be | |
584 | used for this calculation */ | |
585 | inode->i_blocks = (512 - 1 + le64_to_cpu( | |
586 | pfindData->AllocationSize)) >> 9; | |
587 | } | |
588 | spin_unlock(&inode->i_lock); | |
1da177e4 | 589 | |
b9a3260f | 590 | inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks); |
1da177e4 | 591 | |
b9a3260f SF |
592 | /* BB fill in uid and gid here? with help from winbind? |
593 | or retrieve from NTFS stream extended attribute */ | |
4879b448 | 594 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
b9a3260f SF |
595 | /* fill in 0777 bits from ACL */ |
596 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { | |
597 | cFYI(1, ("Getting mode bits from ACL")); | |
598 | acl_to_uid_mode(inode, full_path, pfid); | |
599 | } | |
4879b448 | 600 | #endif |
b9a3260f SF |
601 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { |
602 | /* fill in remaining high mode bits e.g. SUID, VTX */ | |
603 | get_sfu_mode(inode, full_path, cifs_sb, xid); | |
604 | } else if (atomic_read(&cifsInfo->inUse) == 0) { | |
605 | inode->i_uid = cifs_sb->mnt_uid; | |
606 | inode->i_gid = cifs_sb->mnt_gid; | |
607 | /* set so we do not keep refreshing these fields with | |
608 | bad data after user has changed them in memory */ | |
609 | atomic_set(&cifsInfo->inUse, 1); | |
1da177e4 | 610 | } |
b9a3260f SF |
611 | |
612 | cifs_set_ops(inode, is_dfs_referral); | |
613 | ||
614 | ||
615 | ||
616 | ||
7962670e | 617 | cgii_exit: |
1da177e4 LT |
618 | kfree(buf); |
619 | return rc; | |
620 | } | |
621 | ||
7f8ed420 SF |
622 | static const struct inode_operations cifs_ipc_inode_ops = { |
623 | .lookup = cifs_lookup, | |
624 | }; | |
625 | ||
1da177e4 | 626 | /* gets root inode */ |
ce634ab2 | 627 | struct inode *cifs_iget(struct super_block *sb, unsigned long ino) |
1da177e4 | 628 | { |
ce634ab2 | 629 | int xid; |
1da177e4 | 630 | struct cifs_sb_info *cifs_sb; |
ce634ab2 DH |
631 | struct inode *inode; |
632 | long rc; | |
633 | ||
634 | inode = iget_locked(sb, ino); | |
635 | if (!inode) | |
636 | return ERR_PTR(-ENOMEM); | |
637 | if (!(inode->i_state & I_NEW)) | |
638 | return inode; | |
1da177e4 LT |
639 | |
640 | cifs_sb = CIFS_SB(inode->i_sb); | |
641 | xid = GetXid(); | |
c18c842b SF |
642 | |
643 | if (cifs_sb->tcon->unix_ext) | |
7f8ed420 | 644 | rc = cifs_get_inode_info_unix(&inode, "", inode->i_sb, xid); |
1da177e4 | 645 | else |
8b1327f6 SF |
646 | rc = cifs_get_inode_info(&inode, "", NULL, inode->i_sb, xid, |
647 | NULL); | |
7f8ed420 SF |
648 | if (rc && cifs_sb->tcon->ipc) { |
649 | cFYI(1, ("ipc connection - fake read inode")); | |
650 | inode->i_mode |= S_IFDIR; | |
651 | inode->i_nlink = 2; | |
652 | inode->i_op = &cifs_ipc_inode_ops; | |
653 | inode->i_fop = &simple_dir_operations; | |
654 | inode->i_uid = cifs_sb->mnt_uid; | |
655 | inode->i_gid = cifs_sb->mnt_gid; | |
ce634ab2 DH |
656 | _FreeXid(xid); |
657 | iget_failed(inode); | |
658 | return ERR_PTR(rc); | |
7f8ed420 SF |
659 | } |
660 | ||
ce634ab2 DH |
661 | unlock_new_inode(inode); |
662 | ||
663 | /* can not call macro FreeXid here since in a void func | |
664 | * TODO: This is no longer true | |
665 | */ | |
1da177e4 | 666 | _FreeXid(xid); |
ce634ab2 | 667 | return inode; |
1da177e4 LT |
668 | } |
669 | ||
670 | int cifs_unlink(struct inode *inode, struct dentry *direntry) | |
671 | { | |
672 | int rc = 0; | |
673 | int xid; | |
674 | struct cifs_sb_info *cifs_sb; | |
675 | struct cifsTconInfo *pTcon; | |
676 | char *full_path = NULL; | |
677 | struct cifsInodeInfo *cifsInode; | |
678 | FILE_BASIC_INFO *pinfo_buf; | |
679 | ||
06bcfedd | 680 | cFYI(1, ("cifs_unlink, inode = 0x%p", inode)); |
1da177e4 LT |
681 | |
682 | xid = GetXid(); | |
683 | ||
4523cc30 | 684 | if (inode) |
6910ab30 SF |
685 | cifs_sb = CIFS_SB(inode->i_sb); |
686 | else | |
06bcfedd | 687 | cifs_sb = CIFS_SB(direntry->d_sb); |
1da177e4 LT |
688 | pTcon = cifs_sb->tcon; |
689 | ||
690 | /* Unlink can be called from rename so we can not grab the sem here | |
691 | since we deadlock otherwise */ | |
a11f3a05 | 692 | /* mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/ |
7f57356b | 693 | full_path = build_path_from_dentry(direntry); |
a11f3a05 | 694 | /* mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/ |
1da177e4 LT |
695 | if (full_path == NULL) { |
696 | FreeXid(xid); | |
697 | return -ENOMEM; | |
698 | } | |
2d785a50 SF |
699 | |
700 | if ((pTcon->ses->capabilities & CAP_UNIX) && | |
701 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & | |
702 | le64_to_cpu(pTcon->fsUnixInfo.Capability))) { | |
703 | rc = CIFSPOSIXDelFile(xid, pTcon, full_path, | |
704 | SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls, | |
737b758c | 705 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
2d785a50 SF |
706 | cFYI(1, ("posix del rc %d", rc)); |
707 | if ((rc == 0) || (rc == -ENOENT)) | |
708 | goto psx_del_no_retry; | |
709 | } | |
1da177e4 | 710 | |
2d785a50 SF |
711 | rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls, |
712 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
713 | psx_del_no_retry: | |
1da177e4 | 714 | if (!rc) { |
d0d2f2df | 715 | if (direntry->d_inode) |
9a53c3a7 | 716 | drop_nlink(direntry->d_inode); |
1da177e4 LT |
717 | } else if (rc == -ENOENT) { |
718 | d_drop(direntry); | |
719 | } else if (rc == -ETXTBSY) { | |
4b18f2a9 | 720 | int oplock = 0; |
1da177e4 LT |
721 | __u16 netfid; |
722 | ||
723 | rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE, | |
724 | CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE, | |
737b758c | 725 | &netfid, &oplock, NULL, cifs_sb->local_nls, |
fb8c4b14 | 726 | cifs_sb->mnt_cifs_flags & |
737b758c | 727 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
fb8c4b14 | 728 | if (rc == 0) { |
1da177e4 | 729 | CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL, |
fb8c4b14 SF |
730 | cifs_sb->local_nls, |
731 | cifs_sb->mnt_cifs_flags & | |
737b758c | 732 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1da177e4 | 733 | CIFSSMBClose(xid, pTcon, netfid); |
d0d2f2df | 734 | if (direntry->d_inode) |
9a53c3a7 | 735 | drop_nlink(direntry->d_inode); |
1da177e4 LT |
736 | } |
737 | } else if (rc == -EACCES) { | |
738 | /* try only if r/o attribute set in local lookup data? */ | |
a048d7a8 | 739 | pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL); |
1da177e4 | 740 | if (pinfo_buf) { |
1da177e4 LT |
741 | /* ATTRS set to normal clears r/o bit */ |
742 | pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL); | |
743 | if (!(pTcon->ses->flags & CIFS_SES_NT4)) | |
744 | rc = CIFSSMBSetTimes(xid, pTcon, full_path, | |
745 | pinfo_buf, | |
737b758c | 746 | cifs_sb->local_nls, |
fb8c4b14 | 747 | cifs_sb->mnt_cifs_flags & |
737b758c | 748 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1da177e4 LT |
749 | else |
750 | rc = -EOPNOTSUPP; | |
751 | ||
752 | if (rc == -EOPNOTSUPP) { | |
4b18f2a9 | 753 | int oplock = 0; |
1da177e4 LT |
754 | __u16 netfid; |
755 | /* rc = CIFSSMBSetAttrLegacy(xid, pTcon, | |
756 | full_path, | |
757 | (__u16)ATTR_NORMAL, | |
fb8c4b14 | 758 | cifs_sb->local_nls); |
1da177e4 LT |
759 | For some strange reason it seems that NT4 eats the |
760 | old setattr call without actually setting the | |
761 | attributes so on to the third attempted workaround | |
762 | */ | |
763 | ||
764 | /* BB could scan to see if we already have it open | |
765 | and pass in pid of opener to function */ | |
766 | rc = CIFSSMBOpen(xid, pTcon, full_path, | |
767 | FILE_OPEN, SYNCHRONIZE | | |
768 | FILE_WRITE_ATTRIBUTES, 0, | |
769 | &netfid, &oplock, NULL, | |
737b758c | 770 | cifs_sb->local_nls, |
fb8c4b14 | 771 | cifs_sb->mnt_cifs_flags & |
737b758c | 772 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
fb8c4b14 | 773 | if (rc == 0) { |
1da177e4 LT |
774 | rc = CIFSSMBSetFileTimes(xid, pTcon, |
775 | pinfo_buf, | |
776 | netfid); | |
777 | CIFSSMBClose(xid, pTcon, netfid); | |
778 | } | |
779 | } | |
780 | kfree(pinfo_buf); | |
781 | } | |
fb8c4b14 SF |
782 | if (rc == 0) { |
783 | rc = CIFSSMBDelFile(xid, pTcon, full_path, | |
784 | cifs_sb->local_nls, | |
785 | cifs_sb->mnt_cifs_flags & | |
737b758c | 786 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1da177e4 | 787 | if (!rc) { |
d0d2f2df | 788 | if (direntry->d_inode) |
9a53c3a7 | 789 | drop_nlink(direntry->d_inode); |
1da177e4 | 790 | } else if (rc == -ETXTBSY) { |
4b18f2a9 | 791 | int oplock = 0; |
1da177e4 LT |
792 | __u16 netfid; |
793 | ||
794 | rc = CIFSSMBOpen(xid, pTcon, full_path, | |
795 | FILE_OPEN, DELETE, | |
796 | CREATE_NOT_DIR | | |
797 | CREATE_DELETE_ON_CLOSE, | |
798 | &netfid, &oplock, NULL, | |
fb8c4b14 SF |
799 | cifs_sb->local_nls, |
800 | cifs_sb->mnt_cifs_flags & | |
737b758c | 801 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
fb8c4b14 | 802 | if (rc == 0) { |
1da177e4 LT |
803 | CIFSSMBRenameOpenFile(xid, pTcon, |
804 | netfid, NULL, | |
737b758c SF |
805 | cifs_sb->local_nls, |
806 | cifs_sb->mnt_cifs_flags & | |
807 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 | 808 | CIFSSMBClose(xid, pTcon, netfid); |
d0d2f2df | 809 | if (direntry->d_inode) |
9a53c3a7 | 810 | drop_nlink(direntry->d_inode); |
1da177e4 LT |
811 | } |
812 | /* BB if rc = -ETXTBUSY goto the rename logic BB */ | |
813 | } | |
814 | } | |
815 | } | |
d0d2f2df | 816 | if (direntry->d_inode) { |
b2aeb9d5 SF |
817 | cifsInode = CIFS_I(direntry->d_inode); |
818 | cifsInode->time = 0; /* will force revalidate to get info | |
819 | when needed */ | |
820 | direntry->d_inode->i_ctime = current_fs_time(inode->i_sb); | |
821 | } | |
4523cc30 | 822 | if (inode) { |
06bcfedd SF |
823 | inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb); |
824 | cifsInode = CIFS_I(inode); | |
825 | cifsInode->time = 0; /* force revalidate of dir as well */ | |
826 | } | |
1da177e4 LT |
827 | |
828 | kfree(full_path); | |
829 | FreeXid(xid); | |
830 | return rc; | |
831 | } | |
832 | ||
2dd29d31 | 833 | static void posix_fill_in_inode(struct inode *tmp_inode, |
0b442d2c | 834 | FILE_UNIX_BASIC_INFO *pData, int isNewInode) |
2dd29d31 | 835 | { |
75f12983 | 836 | struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); |
2dd29d31 SF |
837 | loff_t local_size; |
838 | struct timespec local_mtime; | |
839 | ||
2dd29d31 SF |
840 | cifsInfo->time = jiffies; |
841 | atomic_inc(&cifsInfo->inUse); | |
842 | ||
843 | /* save mtime and size */ | |
844 | local_mtime = tmp_inode->i_mtime; | |
845 | local_size = tmp_inode->i_size; | |
846 | ||
75f12983 | 847 | cifs_unix_info_to_inode(tmp_inode, pData, 1); |
7962670e | 848 | cifs_set_ops(tmp_inode, false); |
50c2f753 | 849 | |
75f12983 CH |
850 | if (!S_ISREG(tmp_inode->i_mode)) |
851 | return; | |
2dd29d31 | 852 | |
75f12983 CH |
853 | /* |
854 | * No sense invalidating pages for new inode | |
855 | * since we we have not started caching | |
856 | * readahead file data yet. | |
857 | */ | |
858 | if (isNewInode) | |
859 | return; | |
2dd29d31 | 860 | |
75f12983 CH |
861 | if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && |
862 | (local_size == tmp_inode->i_size)) { | |
863 | cFYI(1, ("inode exists but unchanged")); | |
2dd29d31 | 864 | } else { |
75f12983 CH |
865 | /* file may have changed on server */ |
866 | cFYI(1, ("invalidate inode, readdir detected change")); | |
867 | invalidate_remote_inode(tmp_inode); | |
fb8c4b14 | 868 | } |
2dd29d31 SF |
869 | } |
870 | ||
1da177e4 LT |
871 | int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode) |
872 | { | |
873 | int rc = 0; | |
874 | int xid; | |
875 | struct cifs_sb_info *cifs_sb; | |
876 | struct cifsTconInfo *pTcon; | |
877 | char *full_path = NULL; | |
878 | struct inode *newinode = NULL; | |
879 | ||
6473a559 | 880 | cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode)); |
1da177e4 LT |
881 | |
882 | xid = GetXid(); | |
883 | ||
884 | cifs_sb = CIFS_SB(inode->i_sb); | |
885 | pTcon = cifs_sb->tcon; | |
886 | ||
7f57356b | 887 | full_path = build_path_from_dentry(direntry); |
1da177e4 LT |
888 | if (full_path == NULL) { |
889 | FreeXid(xid); | |
890 | return -ENOMEM; | |
891 | } | |
50c2f753 | 892 | |
fb8c4b14 SF |
893 | if ((pTcon->ses->capabilities & CAP_UNIX) && |
894 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & | |
2dd29d31 SF |
895 | le64_to_cpu(pTcon->fsUnixInfo.Capability))) { |
896 | u32 oplock = 0; | |
f6d09982 | 897 | FILE_UNIX_BASIC_INFO *pInfo = |
2dd29d31 | 898 | kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL); |
fb8c4b14 | 899 | if (pInfo == NULL) { |
2dd29d31 SF |
900 | rc = -ENOMEM; |
901 | goto mkdir_out; | |
902 | } | |
50c2f753 | 903 | |
a8cd925f | 904 | mode &= ~current->fs->umask; |
2dd29d31 SF |
905 | rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT, |
906 | mode, NULL /* netfid */, pInfo, &oplock, | |
fb8c4b14 SF |
907 | full_path, cifs_sb->local_nls, |
908 | cifs_sb->mnt_cifs_flags & | |
2dd29d31 | 909 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
c45d707f SF |
910 | if (rc == -EOPNOTSUPP) { |
911 | kfree(pInfo); | |
912 | goto mkdir_retry_old; | |
913 | } else if (rc) { | |
2dd29d31 SF |
914 | cFYI(1, ("posix mkdir returned 0x%x", rc)); |
915 | d_drop(direntry); | |
916 | } else { | |
8f2376ad CG |
917 | if (pInfo->Type == cpu_to_le32(-1)) { |
918 | /* no return info, go query for it */ | |
5a07cdf8 | 919 | kfree(pInfo); |
fb8c4b14 | 920 | goto mkdir_get_info; |
5a07cdf8 | 921 | } |
fb8c4b14 SF |
922 | /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need |
923 | to set uid/gid */ | |
2dd29d31 SF |
924 | inc_nlink(inode); |
925 | if (pTcon->nocase) | |
926 | direntry->d_op = &cifs_ci_dentry_ops; | |
927 | else | |
928 | direntry->d_op = &cifs_dentry_ops; | |
cbac3cba SF |
929 | |
930 | newinode = new_inode(inode->i_sb); | |
5a07cdf8 SF |
931 | if (newinode == NULL) { |
932 | kfree(pInfo); | |
cbac3cba | 933 | goto mkdir_get_info; |
5a07cdf8 | 934 | } |
cbac3cba SF |
935 | /* Is an i_ino of zero legal? */ |
936 | /* Are there sanity checks we can use to ensure that | |
937 | the server is really filling in that field? */ | |
938 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { | |
939 | newinode->i_ino = | |
940 | (unsigned long)pInfo->UniqueId; | |
941 | } /* note ino incremented to unique num in new_inode */ | |
fb8c4b14 | 942 | if (inode->i_sb->s_flags & MS_NOATIME) |
cbac3cba SF |
943 | newinode->i_flags |= S_NOATIME | S_NOCMTIME; |
944 | newinode->i_nlink = 2; | |
945 | ||
946 | insert_inode_hash(newinode); | |
2dd29d31 | 947 | d_instantiate(direntry, newinode); |
cbac3cba SF |
948 | |
949 | /* we already checked in POSIXCreate whether | |
950 | frame was long enough */ | |
951 | posix_fill_in_inode(direntry->d_inode, | |
0b442d2c | 952 | pInfo, 1 /* NewInode */); |
cbac3cba | 953 | #ifdef CONFIG_CIFS_DEBUG2 |
fb8c4b14 | 954 | cFYI(1, ("instantiated dentry %p %s to inode %p", |
cbac3cba SF |
955 | direntry, direntry->d_name.name, newinode)); |
956 | ||
fb8c4b14 SF |
957 | if (newinode->i_nlink != 2) |
958 | cFYI(1, ("unexpected number of links %d", | |
cbac3cba SF |
959 | newinode->i_nlink)); |
960 | #endif | |
2dd29d31 SF |
961 | } |
962 | kfree(pInfo); | |
963 | goto mkdir_out; | |
fb8c4b14 | 964 | } |
c45d707f | 965 | mkdir_retry_old: |
1da177e4 | 966 | /* BB add setting the equivalent of mode via CreateX w/ACLs */ |
737b758c SF |
967 | rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls, |
968 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 | 969 | if (rc) { |
26a21b98 | 970 | cFYI(1, ("cifs_mkdir returned 0x%x", rc)); |
1da177e4 LT |
971 | d_drop(direntry); |
972 | } else { | |
fb8c4b14 | 973 | mkdir_get_info: |
d8c76e6f | 974 | inc_nlink(inode); |
c18c842b | 975 | if (pTcon->unix_ext) |
1da177e4 | 976 | rc = cifs_get_inode_info_unix(&newinode, full_path, |
fb8c4b14 | 977 | inode->i_sb, xid); |
1da177e4 LT |
978 | else |
979 | rc = cifs_get_inode_info(&newinode, full_path, NULL, | |
8b1327f6 | 980 | inode->i_sb, xid, NULL); |
1da177e4 | 981 | |
b92327fe SF |
982 | if (pTcon->nocase) |
983 | direntry->d_op = &cifs_ci_dentry_ops; | |
984 | else | |
985 | direntry->d_op = &cifs_dentry_ops; | |
1da177e4 | 986 | d_instantiate(direntry, newinode); |
2dd29d31 | 987 | /* setting nlink not necessary except in cases where we |
fb8c4b14 | 988 | * failed to get it from the server or was set bogus */ |
2dd29d31 | 989 | if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2)) |
fb8c4b14 | 990 | direntry->d_inode->i_nlink = 2; |
67750fb9 | 991 | mode &= ~current->fs->umask; |
c18c842b | 992 | if (pTcon->unix_ext) { |
d0d2f2df | 993 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
1da177e4 LT |
994 | CIFSSMBUnixSetPerms(xid, pTcon, full_path, |
995 | mode, | |
83451879 SF |
996 | (__u64)current->fsuid, |
997 | (__u64)current->fsgid, | |
1da177e4 | 998 | 0 /* dev_t */, |
737b758c SF |
999 | cifs_sb->local_nls, |
1000 | cifs_sb->mnt_cifs_flags & | |
1001 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
1002 | } else { |
1003 | CIFSSMBUnixSetPerms(xid, pTcon, full_path, | |
1004 | mode, (__u64)-1, | |
1005 | (__u64)-1, 0 /* dev_t */, | |
737b758c | 1006 | cifs_sb->local_nls, |
fb8c4b14 | 1007 | cifs_sb->mnt_cifs_flags & |
737b758c | 1008 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1da177e4 | 1009 | } |
3ce53fc4 | 1010 | } else { |
67750fb9 JL |
1011 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) && |
1012 | (mode & S_IWUGO) == 0) { | |
1013 | FILE_BASIC_INFO pInfo; | |
1014 | memset(&pInfo, 0, sizeof(pInfo)); | |
1015 | pInfo.Attributes = cpu_to_le32(ATTR_READONLY); | |
1016 | CIFSSMBSetTimes(xid, pTcon, full_path, | |
1017 | &pInfo, cifs_sb->local_nls, | |
1018 | cifs_sb->mnt_cifs_flags & | |
1019 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1020 | } | |
fb8c4b14 | 1021 | if (direntry->d_inode) { |
6473a559 | 1022 | direntry->d_inode->i_mode = mode; |
25741b3e | 1023 | direntry->d_inode->i_mode |= S_IFDIR; |
fb8c4b14 | 1024 | if (cifs_sb->mnt_cifs_flags & |
6473a559 | 1025 | CIFS_MOUNT_SET_UID) { |
fb8c4b14 | 1026 | direntry->d_inode->i_uid = |
6473a559 | 1027 | current->fsuid; |
fb8c4b14 | 1028 | direntry->d_inode->i_gid = |
6473a559 SF |
1029 | current->fsgid; |
1030 | } | |
1031 | } | |
2a138ebb | 1032 | } |
1da177e4 | 1033 | } |
fb8c4b14 | 1034 | mkdir_out: |
1da177e4 LT |
1035 | kfree(full_path); |
1036 | FreeXid(xid); | |
1037 | return rc; | |
1038 | } | |
1039 | ||
1040 | int cifs_rmdir(struct inode *inode, struct dentry *direntry) | |
1041 | { | |
1042 | int rc = 0; | |
1043 | int xid; | |
1044 | struct cifs_sb_info *cifs_sb; | |
1045 | struct cifsTconInfo *pTcon; | |
1046 | char *full_path = NULL; | |
1047 | struct cifsInodeInfo *cifsInode; | |
1048 | ||
26a21b98 | 1049 | cFYI(1, ("cifs_rmdir, inode = 0x%p", inode)); |
1da177e4 LT |
1050 | |
1051 | xid = GetXid(); | |
1052 | ||
1053 | cifs_sb = CIFS_SB(inode->i_sb); | |
1054 | pTcon = cifs_sb->tcon; | |
1055 | ||
7f57356b | 1056 | full_path = build_path_from_dentry(direntry); |
1da177e4 LT |
1057 | if (full_path == NULL) { |
1058 | FreeXid(xid); | |
1059 | return -ENOMEM; | |
1060 | } | |
1061 | ||
737b758c SF |
1062 | rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls, |
1063 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
1064 | |
1065 | if (!rc) { | |
9a53c3a7 | 1066 | drop_nlink(inode); |
3677db10 | 1067 | spin_lock(&direntry->d_inode->i_lock); |
fb8c4b14 | 1068 | i_size_write(direntry->d_inode, 0); |
ce71ec36 | 1069 | clear_nlink(direntry->d_inode); |
3677db10 | 1070 | spin_unlock(&direntry->d_inode->i_lock); |
1da177e4 LT |
1071 | } |
1072 | ||
1073 | cifsInode = CIFS_I(direntry->d_inode); | |
1074 | cifsInode->time = 0; /* force revalidate to go get info when | |
1075 | needed */ | |
1076 | direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime = | |
1077 | current_fs_time(inode->i_sb); | |
1078 | ||
1079 | kfree(full_path); | |
1080 | FreeXid(xid); | |
1081 | return rc; | |
1082 | } | |
1083 | ||
1084 | int cifs_rename(struct inode *source_inode, struct dentry *source_direntry, | |
1085 | struct inode *target_inode, struct dentry *target_direntry) | |
1086 | { | |
1087 | char *fromName; | |
1088 | char *toName; | |
1089 | struct cifs_sb_info *cifs_sb_source; | |
1090 | struct cifs_sb_info *cifs_sb_target; | |
1091 | struct cifsTconInfo *pTcon; | |
1092 | int xid; | |
1093 | int rc = 0; | |
1094 | ||
1095 | xid = GetXid(); | |
1096 | ||
1097 | cifs_sb_target = CIFS_SB(target_inode->i_sb); | |
1098 | cifs_sb_source = CIFS_SB(source_inode->i_sb); | |
1099 | pTcon = cifs_sb_source->tcon; | |
1100 | ||
1101 | if (pTcon != cifs_sb_target->tcon) { | |
1102 | FreeXid(xid); | |
1103 | return -EXDEV; /* BB actually could be allowed if same server, | |
1104 | but different share. | |
1105 | Might eventually add support for this */ | |
1106 | } | |
1107 | ||
1108 | /* we already have the rename sem so we do not need to grab it again | |
1109 | here to protect the path integrity */ | |
7f57356b SF |
1110 | fromName = build_path_from_dentry(source_direntry); |
1111 | toName = build_path_from_dentry(target_direntry); | |
1da177e4 LT |
1112 | if ((fromName == NULL) || (toName == NULL)) { |
1113 | rc = -ENOMEM; | |
1114 | goto cifs_rename_exit; | |
1115 | } | |
1116 | ||
1117 | rc = CIFSSMBRename(xid, pTcon, fromName, toName, | |
737b758c SF |
1118 | cifs_sb_source->local_nls, |
1119 | cifs_sb_source->mnt_cifs_flags & | |
1120 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
1121 | if (rc == -EEXIST) { |
1122 | /* check if they are the same file because rename of hardlinked | |
1123 | files is a noop */ | |
1124 | FILE_UNIX_BASIC_INFO *info_buf_source; | |
1125 | FILE_UNIX_BASIC_INFO *info_buf_target; | |
1126 | ||
1127 | info_buf_source = | |
1128 | kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL); | |
1129 | if (info_buf_source != NULL) { | |
1130 | info_buf_target = info_buf_source + 1; | |
c18c842b | 1131 | if (pTcon->unix_ext) |
8e87d4dc | 1132 | rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName, |
fb8c4b14 | 1133 | info_buf_source, |
8e87d4dc SF |
1134 | cifs_sb_source->local_nls, |
1135 | cifs_sb_source->mnt_cifs_flags & | |
1136 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1137 | /* else rc is still EEXIST so will fall through to | |
1138 | unlink the target and retry rename */ | |
1da177e4 LT |
1139 | if (rc == 0) { |
1140 | rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName, | |
1141 | info_buf_target, | |
737b758c SF |
1142 | cifs_sb_target->local_nls, |
1143 | /* remap based on source sb */ | |
1144 | cifs_sb_source->mnt_cifs_flags & | |
1145 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
1146 | } |
1147 | if ((rc == 0) && | |
1148 | (info_buf_source->UniqueId == | |
1149 | info_buf_target->UniqueId)) { | |
1150 | /* do not rename since the files are hardlinked which | |
1151 | is a noop */ | |
1152 | } else { | |
1153 | /* we either can not tell the files are hardlinked | |
1154 | (as with Windows servers) or files are not | |
1155 | hardlinked so delete the target manually before | |
1156 | renaming to follow POSIX rather than Windows | |
1157 | semantics */ | |
1158 | cifs_unlink(target_inode, target_direntry); | |
1159 | rc = CIFSSMBRename(xid, pTcon, fromName, | |
1160 | toName, | |
737b758c SF |
1161 | cifs_sb_source->local_nls, |
1162 | cifs_sb_source->mnt_cifs_flags | |
1163 | & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
1164 | } |
1165 | kfree(info_buf_source); | |
1166 | } /* if we can not get memory just leave rc as EEXIST */ | |
1167 | } | |
1168 | ||
ad7a2926 | 1169 | if (rc) |
1da177e4 | 1170 | cFYI(1, ("rename rc %d", rc)); |
1da177e4 LT |
1171 | |
1172 | if ((rc == -EIO) || (rc == -EEXIST)) { | |
4b18f2a9 | 1173 | int oplock = 0; |
1da177e4 LT |
1174 | __u16 netfid; |
1175 | ||
1176 | /* BB FIXME Is Generic Read correct for rename? */ | |
1177 | /* if renaming directory - we should not say CREATE_NOT_DIR, | |
1178 | need to test renaming open directory, also GENERIC_READ | |
1179 | might not right be right access to request */ | |
1180 | rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ, | |
1181 | CREATE_NOT_DIR, &netfid, &oplock, NULL, | |
fb8c4b14 SF |
1182 | cifs_sb_source->local_nls, |
1183 | cifs_sb_source->mnt_cifs_flags & | |
737b758c | 1184 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
fb8c4b14 | 1185 | if (rc == 0) { |
8e87d4dc | 1186 | rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName, |
fb8c4b14 | 1187 | cifs_sb_source->local_nls, |
737b758c SF |
1188 | cifs_sb_source->mnt_cifs_flags & |
1189 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
1190 | CIFSSMBClose(xid, pTcon, netfid); |
1191 | } | |
1192 | } | |
1193 | ||
1194 | cifs_rename_exit: | |
1195 | kfree(fromName); | |
1196 | kfree(toName); | |
1197 | FreeXid(xid); | |
1198 | return rc; | |
1199 | } | |
1200 | ||
1201 | int cifs_revalidate(struct dentry *direntry) | |
1202 | { | |
1203 | int xid; | |
cea21805 | 1204 | int rc = 0, wbrc = 0; |
1da177e4 LT |
1205 | char *full_path; |
1206 | struct cifs_sb_info *cifs_sb; | |
1207 | struct cifsInodeInfo *cifsInode; | |
1208 | loff_t local_size; | |
1209 | struct timespec local_mtime; | |
4b18f2a9 | 1210 | bool invalidate_inode = false; |
1da177e4 LT |
1211 | |
1212 | if (direntry->d_inode == NULL) | |
1213 | return -ENOENT; | |
1214 | ||
1215 | cifsInode = CIFS_I(direntry->d_inode); | |
1216 | ||
1217 | if (cifsInode == NULL) | |
1218 | return -ENOENT; | |
1219 | ||
1220 | /* no sense revalidating inode info on file that no one can write */ | |
1221 | if (CIFS_I(direntry->d_inode)->clientCanCacheRead) | |
1222 | return rc; | |
1223 | ||
1224 | xid = GetXid(); | |
1225 | ||
1226 | cifs_sb = CIFS_SB(direntry->d_sb); | |
1227 | ||
1228 | /* can not safely grab the rename sem here if rename calls revalidate | |
1229 | since that would deadlock */ | |
7f57356b | 1230 | full_path = build_path_from_dentry(direntry); |
1da177e4 LT |
1231 | if (full_path == NULL) { |
1232 | FreeXid(xid); | |
1233 | return -ENOMEM; | |
1234 | } | |
1235 | cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld " | |
1236 | "jiffies %ld", full_path, direntry->d_inode, | |
1237 | direntry->d_inode->i_count.counter, direntry, | |
1238 | direntry->d_time, jiffies)); | |
1239 | ||
1240 | if (cifsInode->time == 0) { | |
1241 | /* was set to zero previously to force revalidate */ | |
1242 | } else if (time_before(jiffies, cifsInode->time + HZ) && | |
1243 | lookupCacheEnabled) { | |
1244 | if ((S_ISREG(direntry->d_inode->i_mode) == 0) || | |
1245 | (direntry->d_inode->i_nlink == 1)) { | |
1246 | kfree(full_path); | |
1247 | FreeXid(xid); | |
1248 | return rc; | |
1249 | } else { | |
1250 | cFYI(1, ("Have to revalidate file due to hardlinks")); | |
1251 | } | |
1252 | } | |
1253 | ||
1254 | /* save mtime and size */ | |
1255 | local_mtime = direntry->d_inode->i_mtime; | |
1256 | local_size = direntry->d_inode->i_size; | |
1257 | ||
c18c842b | 1258 | if (cifs_sb->tcon->unix_ext) { |
1da177e4 | 1259 | rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path, |
fb8c4b14 | 1260 | direntry->d_sb, xid); |
1da177e4 LT |
1261 | if (rc) { |
1262 | cFYI(1, ("error on getting revalidate info %d", rc)); | |
1263 | /* if (rc != -ENOENT) | |
1264 | rc = 0; */ /* BB should we cache info on | |
1265 | certain errors? */ | |
1266 | } | |
1267 | } else { | |
1268 | rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL, | |
8b1327f6 | 1269 | direntry->d_sb, xid, NULL); |
1da177e4 LT |
1270 | if (rc) { |
1271 | cFYI(1, ("error on getting revalidate info %d", rc)); | |
1272 | /* if (rc != -ENOENT) | |
1273 | rc = 0; */ /* BB should we cache info on | |
1274 | certain errors? */ | |
1275 | } | |
1276 | } | |
1277 | /* should we remap certain errors, access denied?, to zero */ | |
1278 | ||
1279 | /* if not oplocked, we invalidate inode pages if mtime or file size | |
1280 | had changed on server */ | |
1281 | ||
fb8c4b14 | 1282 | if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) && |
1da177e4 LT |
1283 | (local_size == direntry->d_inode->i_size)) { |
1284 | cFYI(1, ("cifs_revalidate - inode unchanged")); | |
1285 | } else { | |
1286 | /* file may have changed on server */ | |
1287 | if (cifsInode->clientCanCacheRead) { | |
1288 | /* no need to invalidate inode pages since we were the | |
1289 | only ones who could have modified the file and the | |
1290 | server copy is staler than ours */ | |
1291 | } else { | |
4b18f2a9 | 1292 | invalidate_inode = true; |
1da177e4 LT |
1293 | } |
1294 | } | |
1295 | ||
1296 | /* can not grab this sem since kernel filesys locking documentation | |
1b1dcc1b JS |
1297 | indicates i_mutex may be taken by the kernel on lookup and rename |
1298 | which could deadlock if we grab the i_mutex here as well */ | |
1299 | /* mutex_lock(&direntry->d_inode->i_mutex);*/ | |
1da177e4 LT |
1300 | /* need to write out dirty pages here */ |
1301 | if (direntry->d_inode->i_mapping) { | |
1302 | /* do we need to lock inode until after invalidate completes | |
1303 | below? */ | |
cea21805 JL |
1304 | wbrc = filemap_fdatawrite(direntry->d_inode->i_mapping); |
1305 | if (wbrc) | |
1306 | CIFS_I(direntry->d_inode)->write_behind_rc = wbrc; | |
1da177e4 LT |
1307 | } |
1308 | if (invalidate_inode) { | |
3abb9272 SF |
1309 | /* shrink_dcache not necessary now that cifs dentry ops |
1310 | are exported for negative dentries */ | |
fb8c4b14 | 1311 | /* if (S_ISDIR(direntry->d_inode->i_mode)) |
3abb9272 SF |
1312 | shrink_dcache_parent(direntry); */ |
1313 | if (S_ISREG(direntry->d_inode->i_mode)) { | |
1314 | if (direntry->d_inode->i_mapping) | |
cea21805 JL |
1315 | wbrc = filemap_fdatawait(direntry->d_inode->i_mapping); |
1316 | if (wbrc) | |
1317 | CIFS_I(direntry->d_inode)->write_behind_rc = wbrc; | |
3abb9272 SF |
1318 | /* may eventually have to do this for open files too */ |
1319 | if (list_empty(&(cifsInode->openFileList))) { | |
1320 | /* changed on server - flush read ahead pages */ | |
1321 | cFYI(1, ("Invalidating read ahead data on " | |
1322 | "closed file")); | |
1323 | invalidate_remote_inode(direntry->d_inode); | |
1324 | } | |
1da177e4 LT |
1325 | } |
1326 | } | |
1b1dcc1b | 1327 | /* mutex_unlock(&direntry->d_inode->i_mutex); */ |
50c2f753 | 1328 | |
1da177e4 LT |
1329 | kfree(full_path); |
1330 | FreeXid(xid); | |
1331 | return rc; | |
1332 | } | |
1333 | ||
1334 | int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
1335 | struct kstat *stat) | |
1336 | { | |
1337 | int err = cifs_revalidate(dentry); | |
5fe14c85 | 1338 | if (!err) { |
1da177e4 | 1339 | generic_fillattr(dentry->d_inode, stat); |
5fe14c85 SF |
1340 | stat->blksize = CIFS_MAX_MSGSIZE; |
1341 | } | |
1da177e4 LT |
1342 | return err; |
1343 | } | |
1344 | ||
1345 | static int cifs_truncate_page(struct address_space *mapping, loff_t from) | |
1346 | { | |
1347 | pgoff_t index = from >> PAGE_CACHE_SHIFT; | |
1348 | unsigned offset = from & (PAGE_CACHE_SIZE - 1); | |
1349 | struct page *page; | |
1da177e4 LT |
1350 | int rc = 0; |
1351 | ||
1352 | page = grab_cache_page(mapping, index); | |
1353 | if (!page) | |
1354 | return -ENOMEM; | |
1355 | ||
eebd2aa3 | 1356 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); |
1da177e4 LT |
1357 | unlock_page(page); |
1358 | page_cache_release(page); | |
1359 | return rc; | |
1360 | } | |
1361 | ||
fb8c4b14 | 1362 | static int cifs_vmtruncate(struct inode *inode, loff_t offset) |
3677db10 SF |
1363 | { |
1364 | struct address_space *mapping = inode->i_mapping; | |
1365 | unsigned long limit; | |
1366 | ||
ba6a46a0 | 1367 | spin_lock(&inode->i_lock); |
3677db10 SF |
1368 | if (inode->i_size < offset) |
1369 | goto do_expand; | |
1370 | /* | |
1371 | * truncation of in-use swapfiles is disallowed - it would cause | |
1372 | * subsequent swapout to scribble on the now-freed blocks. | |
1373 | */ | |
ba6a46a0 SF |
1374 | if (IS_SWAPFILE(inode)) { |
1375 | spin_unlock(&inode->i_lock); | |
3677db10 | 1376 | goto out_busy; |
ba6a46a0 | 1377 | } |
3677db10 SF |
1378 | i_size_write(inode, offset); |
1379 | spin_unlock(&inode->i_lock); | |
8064ab4d SF |
1380 | /* |
1381 | * unmap_mapping_range is called twice, first simply for efficiency | |
1382 | * so that truncate_inode_pages does fewer single-page unmaps. However | |
1383 | * after this first call, and before truncate_inode_pages finishes, | |
1384 | * it is possible for private pages to be COWed, which remain after | |
1385 | * truncate_inode_pages finishes, hence the second unmap_mapping_range | |
1386 | * call must be made for correctness. | |
1387 | */ | |
3677db10 SF |
1388 | unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1); |
1389 | truncate_inode_pages(mapping, offset); | |
8064ab4d | 1390 | unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1); |
3677db10 SF |
1391 | goto out_truncate; |
1392 | ||
1393 | do_expand: | |
1394 | limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur; | |
ba6a46a0 SF |
1395 | if (limit != RLIM_INFINITY && offset > limit) { |
1396 | spin_unlock(&inode->i_lock); | |
3677db10 | 1397 | goto out_sig; |
ba6a46a0 SF |
1398 | } |
1399 | if (offset > inode->i_sb->s_maxbytes) { | |
1400 | spin_unlock(&inode->i_lock); | |
3677db10 | 1401 | goto out_big; |
ba6a46a0 | 1402 | } |
3677db10 | 1403 | i_size_write(inode, offset); |
ba6a46a0 | 1404 | spin_unlock(&inode->i_lock); |
3677db10 SF |
1405 | out_truncate: |
1406 | if (inode->i_op && inode->i_op->truncate) | |
1407 | inode->i_op->truncate(inode); | |
1408 | return 0; | |
1409 | out_sig: | |
1410 | send_sig(SIGXFSZ, current, 0); | |
1411 | out_big: | |
1412 | return -EFBIG; | |
1413 | out_busy: | |
1414 | return -ETXTBSY; | |
1415 | } | |
1416 | ||
1da177e4 LT |
1417 | int cifs_setattr(struct dentry *direntry, struct iattr *attrs) |
1418 | { | |
1419 | int xid; | |
1420 | struct cifs_sb_info *cifs_sb; | |
1421 | struct cifsTconInfo *pTcon; | |
1422 | char *full_path = NULL; | |
1423 | int rc = -EACCES; | |
1da177e4 LT |
1424 | struct cifsFileInfo *open_file = NULL; |
1425 | FILE_BASIC_INFO time_buf; | |
4b18f2a9 SF |
1426 | bool set_time = false; |
1427 | bool set_dosattr = false; | |
1da177e4 LT |
1428 | __u64 mode = 0xFFFFFFFFFFFFFFFFULL; |
1429 | __u64 uid = 0xFFFFFFFFFFFFFFFFULL; | |
1430 | __u64 gid = 0xFFFFFFFFFFFFFFFFULL; | |
1431 | struct cifsInodeInfo *cifsInode; | |
02eadeff | 1432 | struct inode *inode = direntry->d_inode; |
1da177e4 LT |
1433 | |
1434 | xid = GetXid(); | |
1435 | ||
3979877e | 1436 | cFYI(1, ("setattr on file %s attrs->iavalid 0x%x", |
1da177e4 | 1437 | direntry->d_name.name, attrs->ia_valid)); |
6473a559 | 1438 | |
02eadeff | 1439 | cifs_sb = CIFS_SB(inode->i_sb); |
1da177e4 LT |
1440 | pTcon = cifs_sb->tcon; |
1441 | ||
2a138ebb | 1442 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) { |
6473a559 | 1443 | /* check if we have permission to change attrs */ |
02eadeff | 1444 | rc = inode_change_ok(inode, attrs); |
fb8c4b14 | 1445 | if (rc < 0) { |
6473a559 SF |
1446 | FreeXid(xid); |
1447 | return rc; | |
1448 | } else | |
1449 | rc = 0; | |
1450 | } | |
50c2f753 | 1451 | |
7f57356b | 1452 | full_path = build_path_from_dentry(direntry); |
1da177e4 LT |
1453 | if (full_path == NULL) { |
1454 | FreeXid(xid); | |
1455 | return -ENOMEM; | |
1456 | } | |
02eadeff | 1457 | cifsInode = CIFS_I(inode); |
1da177e4 | 1458 | |
50531444 | 1459 | if ((attrs->ia_valid & ATTR_MTIME) || (attrs->ia_valid & ATTR_SIZE)) { |
cea21805 | 1460 | /* |
50531444 SF |
1461 | Flush data before changing file size or changing the last |
1462 | write time of the file on the server. If the | |
cea21805 JL |
1463 | flush returns error, store it to report later and continue. |
1464 | BB: This should be smarter. Why bother flushing pages that | |
1465 | will be truncated anyway? Also, should we error out here if | |
1466 | the flush returns error? | |
1467 | */ | |
02eadeff | 1468 | rc = filemap_write_and_wait(inode->i_mapping); |
cea21805 | 1469 | if (rc != 0) { |
02eadeff | 1470 | cifsInode->write_behind_rc = rc; |
cea21805 JL |
1471 | rc = 0; |
1472 | } | |
50531444 | 1473 | } |
cea21805 | 1474 | |
50531444 | 1475 | if (attrs->ia_valid & ATTR_SIZE) { |
1da177e4 LT |
1476 | /* To avoid spurious oplock breaks from server, in the case of |
1477 | inodes that we already have open, avoid doing path based | |
1478 | setting of file size if we can do it by handle. | |
1479 | This keeps our caching token (oplock) and avoids timeouts | |
1480 | when the local oplock break takes longer to flush | |
1481 | writebehind data than the SMB timeout for the SetPathInfo | |
1482 | request would allow */ | |
3979877e | 1483 | |
6148a742 SF |
1484 | open_file = find_writable_file(cifsInode); |
1485 | if (open_file) { | |
1486 | __u16 nfid = open_file->netfid; | |
1487 | __u32 npid = open_file->pid; | |
1488 | rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size, | |
4b18f2a9 | 1489 | nfid, npid, false); |
23e7dd7d | 1490 | atomic_dec(&open_file->wrtPending); |
fb8c4b14 SF |
1491 | cFYI(1, ("SetFSize for attrs rc = %d", rc)); |
1492 | if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { | |
77159b4d | 1493 | unsigned int bytes_written; |
6148a742 SF |
1494 | rc = CIFSSMBWrite(xid, pTcon, |
1495 | nfid, 0, attrs->ia_size, | |
1496 | &bytes_written, NULL, NULL, | |
1497 | 1 /* 45 seconds */); | |
fb8c4b14 | 1498 | cFYI(1, ("Wrt seteof rc %d", rc)); |
1da177e4 | 1499 | } |
fb8c4b14 | 1500 | } else |
6473a559 SF |
1501 | rc = -EINVAL; |
1502 | ||
1da177e4 LT |
1503 | if (rc != 0) { |
1504 | /* Set file size by pathname rather than by handle | |
1505 | either because no valid, writeable file handle for | |
1506 | it was found or because there was an error setting | |
1507 | it by handle */ | |
1508 | rc = CIFSSMBSetEOF(xid, pTcon, full_path, | |
4b18f2a9 | 1509 | attrs->ia_size, false, |
fb8c4b14 | 1510 | cifs_sb->local_nls, |
737b758c SF |
1511 | cifs_sb->mnt_cifs_flags & |
1512 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
e30dcf3a | 1513 | cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc)); |
fb8c4b14 | 1514 | if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { |
e30dcf3a | 1515 | __u16 netfid; |
4b18f2a9 | 1516 | int oplock = 0; |
e30dcf3a SF |
1517 | |
1518 | rc = SMBLegacyOpen(xid, pTcon, full_path, | |
35fc37d5 | 1519 | FILE_OPEN, GENERIC_WRITE, |
e30dcf3a SF |
1520 | CREATE_NOT_DIR, &netfid, &oplock, |
1521 | NULL, cifs_sb->local_nls, | |
1522 | cifs_sb->mnt_cifs_flags & | |
1523 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
fb8c4b14 | 1524 | if (rc == 0) { |
77159b4d | 1525 | unsigned int bytes_written; |
e30dcf3a SF |
1526 | rc = CIFSSMBWrite(xid, pTcon, |
1527 | netfid, 0, | |
1528 | attrs->ia_size, | |
1529 | &bytes_written, NULL, | |
1530 | NULL, 1 /* 45 sec */); | |
fb8c4b14 | 1531 | cFYI(1, ("wrt seteof rc %d", rc)); |
e30dcf3a SF |
1532 | CIFSSMBClose(xid, pTcon, netfid); |
1533 | } | |
1534 | ||
1535 | } | |
1da177e4 LT |
1536 | } |
1537 | ||
1538 | /* Server is ok setting allocation size implicitly - no need | |
1539 | to call: | |
4b18f2a9 | 1540 | CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, true, |
1da177e4 LT |
1541 | cifs_sb->local_nls); |
1542 | */ | |
1543 | ||
1544 | if (rc == 0) { | |
02eadeff JL |
1545 | rc = cifs_vmtruncate(inode, attrs->ia_size); |
1546 | cifs_truncate_page(inode->i_mapping, inode->i_size); | |
fb8c4b14 | 1547 | } else |
e30dcf3a | 1548 | goto cifs_setattr_exit; |
1da177e4 LT |
1549 | } |
1550 | if (attrs->ia_valid & ATTR_UID) { | |
e30dcf3a | 1551 | cFYI(1, ("UID changed to %d", attrs->ia_uid)); |
1da177e4 | 1552 | uid = attrs->ia_uid; |
1da177e4 LT |
1553 | } |
1554 | if (attrs->ia_valid & ATTR_GID) { | |
e30dcf3a | 1555 | cFYI(1, ("GID changed to %d", attrs->ia_gid)); |
1da177e4 | 1556 | gid = attrs->ia_gid; |
1da177e4 LT |
1557 | } |
1558 | ||
1559 | time_buf.Attributes = 0; | |
d32c4f26 JL |
1560 | |
1561 | /* skip mode change if it's just for clearing setuid/setgid */ | |
1562 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) | |
1563 | attrs->ia_valid &= ~ATTR_MODE; | |
1564 | ||
1da177e4 | 1565 | if (attrs->ia_valid & ATTR_MODE) { |
e30dcf3a | 1566 | cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode)); |
1da177e4 | 1567 | mode = attrs->ia_mode; |
1da177e4 LT |
1568 | } |
1569 | ||
c18c842b | 1570 | if ((pTcon->unix_ext) |
1da177e4 LT |
1571 | && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID))) |
1572 | rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid, | |
737b758c | 1573 | 0 /* dev_t */, cifs_sb->local_nls, |
fb8c4b14 | 1574 | cifs_sb->mnt_cifs_flags & |
737b758c | 1575 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1da177e4 | 1576 | else if (attrs->ia_valid & ATTR_MODE) { |
cdbce9c8 | 1577 | rc = 0; |
97837582 SF |
1578 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
1579 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) | |
02eadeff | 1580 | rc = mode_to_acl(inode, full_path, mode); |
f6d09982 | 1581 | else if ((mode & S_IWUGO) == 0) { |
97837582 | 1582 | #else |
f6d09982 | 1583 | if ((mode & S_IWUGO) == 0) { |
97837582 | 1584 | #endif |
f6d09982 | 1585 | /* not writeable */ |
066fcb06 | 1586 | if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0) { |
4b18f2a9 | 1587 | set_dosattr = true; |
1da177e4 LT |
1588 | time_buf.Attributes = |
1589 | cpu_to_le32(cifsInode->cifsAttrs | | |
1590 | ATTR_READONLY); | |
066fcb06 | 1591 | } |
5268df2e SF |
1592 | } else if (cifsInode->cifsAttrs & ATTR_READONLY) { |
1593 | /* If file is readonly on server, we would | |
1594 | not be able to write to it - so if any write | |
1595 | bit is enabled for user or group or other we | |
1596 | need to at least try to remove r/o dos attr */ | |
4b18f2a9 | 1597 | set_dosattr = true; |
5268df2e SF |
1598 | time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs & |
1599 | (~ATTR_READONLY)); | |
1600 | /* Windows ignores set to zero */ | |
fb8c4b14 | 1601 | if (time_buf.Attributes == 0) |
5268df2e | 1602 | time_buf.Attributes |= cpu_to_le32(ATTR_NORMAL); |
1da177e4 | 1603 | } |
1da177e4 LT |
1604 | } |
1605 | ||
1606 | if (attrs->ia_valid & ATTR_ATIME) { | |
4b18f2a9 | 1607 | set_time = true; |
1da177e4 LT |
1608 | time_buf.LastAccessTime = |
1609 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime)); | |
1610 | } else | |
1611 | time_buf.LastAccessTime = 0; | |
1612 | ||
1613 | if (attrs->ia_valid & ATTR_MTIME) { | |
4b18f2a9 | 1614 | set_time = true; |
1da177e4 LT |
1615 | time_buf.LastWriteTime = |
1616 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime)); | |
1617 | } else | |
1618 | time_buf.LastWriteTime = 0; | |
e30dcf3a SF |
1619 | /* Do not set ctime explicitly unless other time |
1620 | stamps are changed explicitly (i.e. by utime() | |
1621 | since we would then have a mix of client and | |
1622 | server times */ | |
50c2f753 | 1623 | |
e30dcf3a | 1624 | if (set_time && (attrs->ia_valid & ATTR_CTIME)) { |
4b18f2a9 | 1625 | set_time = true; |
e30dcf3a SF |
1626 | /* Although Samba throws this field away |
1627 | it may be useful to Windows - but we do | |
1628 | not want to set ctime unless some other | |
1629 | timestamp is changing */ | |
26a21b98 | 1630 | cFYI(1, ("CIFS - CTIME changed")); |
1da177e4 LT |
1631 | time_buf.ChangeTime = |
1632 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime)); | |
1633 | } else | |
1634 | time_buf.ChangeTime = 0; | |
1635 | ||
066fcb06 | 1636 | if (set_time || set_dosattr) { |
1da177e4 LT |
1637 | time_buf.CreationTime = 0; /* do not change */ |
1638 | /* In the future we should experiment - try setting timestamps | |
1639 | via Handle (SetFileInfo) instead of by path */ | |
1640 | if (!(pTcon->ses->flags & CIFS_SES_NT4)) | |
1641 | rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf, | |
737b758c SF |
1642 | cifs_sb->local_nls, |
1643 | cifs_sb->mnt_cifs_flags & | |
1644 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
1645 | else |
1646 | rc = -EOPNOTSUPP; | |
1647 | ||
1648 | if (rc == -EOPNOTSUPP) { | |
4b18f2a9 | 1649 | int oplock = 0; |
1da177e4 LT |
1650 | __u16 netfid; |
1651 | ||
1652 | cFYI(1, ("calling SetFileInfo since SetPathInfo for " | |
1653 | "times not supported by this server")); | |
1654 | /* BB we could scan to see if we already have it open | |
1655 | and pass in pid of opener to function */ | |
1656 | rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, | |
1657 | SYNCHRONIZE | FILE_WRITE_ATTRIBUTES, | |
1658 | CREATE_NOT_DIR, &netfid, &oplock, | |
737b758c SF |
1659 | NULL, cifs_sb->local_nls, |
1660 | cifs_sb->mnt_cifs_flags & | |
1661 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
fb8c4b14 | 1662 | if (rc == 0) { |
1da177e4 LT |
1663 | rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf, |
1664 | netfid); | |
1665 | CIFSSMBClose(xid, pTcon, netfid); | |
1666 | } else { | |
1667 | /* BB For even older servers we could convert time_buf | |
1668 | into old DOS style which uses two second | |
1669 | granularity */ | |
1670 | ||
1671 | /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path, | |
fb8c4b14 | 1672 | &time_buf, cifs_sb->local_nls); */ |
1da177e4 LT |
1673 | } |
1674 | } | |
e30dcf3a SF |
1675 | /* Even if error on time set, no sense failing the call if |
1676 | the server would set the time to a reasonable value anyway, | |
1677 | and this check ensures that we are not being called from | |
1678 | sys_utimes in which case we ought to fail the call back to | |
1679 | the user when the server rejects the call */ | |
fb8c4b14 | 1680 | if ((rc) && (attrs->ia_valid & |
e30dcf3a SF |
1681 | (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE))) |
1682 | rc = 0; | |
1da177e4 LT |
1683 | } |
1684 | ||
1685 | /* do not need local check to inode_check_ok since the server does | |
1686 | that */ | |
1687 | if (!rc) | |
02eadeff | 1688 | rc = inode_setattr(inode, attrs); |
e30dcf3a | 1689 | cifs_setattr_exit: |
1da177e4 LT |
1690 | kfree(full_path); |
1691 | FreeXid(xid); | |
1692 | return rc; | |
1693 | } | |
1694 | ||
99ee4dbd | 1695 | #if 0 |
1da177e4 LT |
1696 | void cifs_delete_inode(struct inode *inode) |
1697 | { | |
26a21b98 | 1698 | cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode)); |
1da177e4 LT |
1699 | /* may have to add back in if and when safe distributed caching of |
1700 | directories added e.g. via FindNotify */ | |
1701 | } | |
99ee4dbd | 1702 | #endif |