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1da177e4 LT |
1 | /* |
2 | * fs/cifs/inode.c | |
3 | * | |
4 | * Copyright (C) International Business Machines Corp., 2002,2005 | |
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> | |
22 | #include <linux/buffer_head.h> | |
23 | #include <linux/stat.h> | |
24 | #include <linux/pagemap.h> | |
25 | #include <asm/div64.h> | |
26 | #include "cifsfs.h" | |
27 | #include "cifspdu.h" | |
28 | #include "cifsglob.h" | |
29 | #include "cifsproto.h" | |
30 | #include "cifs_debug.h" | |
31 | #include "cifs_fs_sb.h" | |
32 | ||
33 | int cifs_get_inode_info_unix(struct inode **pinode, | |
34 | const unsigned char *search_path, struct super_block *sb, int xid) | |
35 | { | |
36 | int rc = 0; | |
37 | FILE_UNIX_BASIC_INFO findData; | |
38 | struct cifsTconInfo *pTcon; | |
39 | struct inode *inode; | |
40 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
41 | char *tmp_path; | |
42 | ||
43 | pTcon = cifs_sb->tcon; | |
26a21b98 | 44 | cFYI(1, ("Getting info on %s", search_path)); |
1da177e4 LT |
45 | /* could have done a find first instead but this returns more info */ |
46 | rc = CIFSSMBUnixQPathInfo(xid, pTcon, search_path, &findData, | |
737b758c SF |
47 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
48 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
49 | /* dump_mem("\nUnixQPathInfo return data", &findData, |
50 | sizeof(findData)); */ | |
51 | if (rc) { | |
52 | if (rc == -EREMOTE) { | |
53 | tmp_path = | |
54 | kmalloc(strnlen(pTcon->treeName, | |
55 | MAX_TREE_SIZE + 1) + | |
56 | strnlen(search_path, MAX_PATHCONF) + 1, | |
57 | GFP_KERNEL); | |
58 | if (tmp_path == NULL) { | |
59 | return -ENOMEM; | |
60 | } | |
61 | /* have to skip first of the double backslash of | |
62 | UNC name */ | |
63 | strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE); | |
64 | strncat(tmp_path, search_path, MAX_PATHCONF); | |
65 | rc = connect_to_dfs_path(xid, pTcon->ses, | |
66 | /* treename + */ tmp_path, | |
737b758c SF |
67 | cifs_sb->local_nls, |
68 | cifs_sb->mnt_cifs_flags & | |
69 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
70 | kfree(tmp_path); |
71 | ||
72 | /* BB fix up inode etc. */ | |
73 | } else if (rc) { | |
74 | return rc; | |
75 | } | |
76 | } else { | |
77 | struct cifsInodeInfo *cifsInfo; | |
78 | __u32 type = le32_to_cpu(findData.Type); | |
79 | __u64 num_of_bytes = le64_to_cpu(findData.NumOfBytes); | |
80 | __u64 end_of_file = le64_to_cpu(findData.EndOfFile); | |
81 | ||
82 | /* get new inode */ | |
83 | if (*pinode == NULL) { | |
84 | *pinode = new_inode(sb); | |
d0d2f2df | 85 | if (*pinode == NULL) |
1da177e4 LT |
86 | return -ENOMEM; |
87 | /* Is an i_ino of zero legal? */ | |
88 | /* Are there sanity checks we can use to ensure that | |
89 | the server is really filling in that field? */ | |
d0d2f2df | 90 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
1da177e4 LT |
91 | (*pinode)->i_ino = |
92 | (unsigned long)findData.UniqueId; | |
93 | } /* note ino incremented to unique num in new_inode */ | |
94 | insert_inode_hash(*pinode); | |
95 | } | |
96 | ||
97 | inode = *pinode; | |
98 | cifsInfo = CIFS_I(inode); | |
99 | ||
26a21b98 | 100 | cFYI(1, ("Old time %ld", cifsInfo->time)); |
1da177e4 | 101 | cifsInfo->time = jiffies; |
26a21b98 | 102 | cFYI(1, ("New time %ld", cifsInfo->time)); |
1da177e4 LT |
103 | /* this is ok to set on every inode revalidate */ |
104 | atomic_set(&cifsInfo->inUse,1); | |
105 | ||
106 | inode->i_atime = | |
107 | cifs_NTtimeToUnix(le64_to_cpu(findData.LastAccessTime)); | |
108 | inode->i_mtime = | |
109 | cifs_NTtimeToUnix(le64_to_cpu | |
110 | (findData.LastModificationTime)); | |
111 | inode->i_ctime = | |
112 | cifs_NTtimeToUnix(le64_to_cpu(findData.LastStatusChange)); | |
113 | inode->i_mode = le64_to_cpu(findData.Permissions); | |
3020a1f5 SF |
114 | /* since we set the inode type below we need to mask off |
115 | to avoid strange results if bits set above */ | |
116 | inode->i_mode &= ~S_IFMT; | |
1da177e4 LT |
117 | if (type == UNIX_FILE) { |
118 | inode->i_mode |= S_IFREG; | |
119 | } else if (type == UNIX_SYMLINK) { | |
120 | inode->i_mode |= S_IFLNK; | |
121 | } else if (type == UNIX_DIR) { | |
122 | inode->i_mode |= S_IFDIR; | |
123 | } else if (type == UNIX_CHARDEV) { | |
124 | inode->i_mode |= S_IFCHR; | |
125 | inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor), | |
126 | le64_to_cpu(findData.DevMinor) & MINORMASK); | |
127 | } else if (type == UNIX_BLOCKDEV) { | |
128 | inode->i_mode |= S_IFBLK; | |
129 | inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor), | |
130 | le64_to_cpu(findData.DevMinor) & MINORMASK); | |
131 | } else if (type == UNIX_FIFO) { | |
132 | inode->i_mode |= S_IFIFO; | |
133 | } else if (type == UNIX_SOCKET) { | |
134 | inode->i_mode |= S_IFSOCK; | |
3020a1f5 SF |
135 | } else { |
136 | /* safest to call it a file if we do not know */ | |
137 | inode->i_mode |= S_IFREG; | |
138 | cFYI(1,("unknown type %d",type)); | |
1da177e4 LT |
139 | } |
140 | inode->i_uid = le64_to_cpu(findData.Uid); | |
141 | inode->i_gid = le64_to_cpu(findData.Gid); | |
142 | inode->i_nlink = le64_to_cpu(findData.Nlinks); | |
143 | ||
d0d2f2df | 144 | if (is_size_safe_to_change(cifsInfo)) { |
1da177e4 LT |
145 | /* can not safely change the file size here if the |
146 | client is writing to it due to potential races */ | |
147 | ||
148 | i_size_write(inode, end_of_file); | |
149 | ||
150 | /* blksize needs to be multiple of two. So safer to default to | |
151 | blksize and blkbits set in superblock so 2**blkbits and blksize | |
152 | will match rather than setting to: | |
153 | (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/ | |
154 | ||
155 | /* This seems incredibly stupid but it turns out that i_blocks | |
156 | is not related to (i_size / i_blksize), instead 512 byte size | |
157 | is required for calculating num blocks */ | |
158 | ||
159 | /* 512 bytes (2**9) is the fake blocksize that must be used */ | |
160 | /* for this calculation */ | |
161 | inode->i_blocks = (512 - 1 + num_of_bytes) >> 9; | |
162 | } | |
163 | ||
164 | if (num_of_bytes < end_of_file) | |
8b94bcb9 | 165 | cFYI(1, ("allocation size less than end of file")); |
5515eff8 AM |
166 | cFYI(1, ("Size %ld and blocks %llu", |
167 | (unsigned long) inode->i_size, | |
168 | (unsigned long long)inode->i_blocks)); | |
1da177e4 | 169 | if (S_ISREG(inode->i_mode)) { |
8b94bcb9 | 170 | cFYI(1, ("File inode")); |
1da177e4 | 171 | inode->i_op = &cifs_file_inode_ops; |
8b94bcb9 SF |
172 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { |
173 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
174 | inode->i_fop = | |
175 | &cifs_file_direct_nobrl_ops; | |
176 | else | |
177 | inode->i_fop = &cifs_file_direct_ops; | |
178 | } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
179 | inode->i_fop = &cifs_file_nobrl_ops; | |
180 | else /* not direct, send byte range locks */ | |
1da177e4 | 181 | inode->i_fop = &cifs_file_ops; |
8b94bcb9 | 182 | |
bfa0d75a SF |
183 | /* check if server can support readpages */ |
184 | if(pTcon->ses->server->maxBuf < | |
273d81d6 DK |
185 | PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE) |
186 | inode->i_data.a_ops = &cifs_addr_ops_smallbuf; | |
187 | else | |
188 | inode->i_data.a_ops = &cifs_addr_ops; | |
1da177e4 | 189 | } else if (S_ISDIR(inode->i_mode)) { |
8b94bcb9 | 190 | cFYI(1, ("Directory inode")); |
1da177e4 LT |
191 | inode->i_op = &cifs_dir_inode_ops; |
192 | inode->i_fop = &cifs_dir_ops; | |
193 | } else if (S_ISLNK(inode->i_mode)) { | |
8b94bcb9 | 194 | cFYI(1, ("Symbolic Link inode")); |
1da177e4 LT |
195 | inode->i_op = &cifs_symlink_inode_ops; |
196 | /* tmp_inode->i_fop = */ /* do not need to set to anything */ | |
197 | } else { | |
8b94bcb9 | 198 | cFYI(1, ("Init special inode")); |
1da177e4 LT |
199 | init_special_inode(inode, inode->i_mode, |
200 | inode->i_rdev); | |
201 | } | |
202 | } | |
203 | return rc; | |
204 | } | |
205 | ||
d6e2f2a4 SF |
206 | static int decode_sfu_inode(struct inode * inode, __u64 size, |
207 | const unsigned char *path, | |
208 | struct cifs_sb_info *cifs_sb, int xid) | |
209 | { | |
210 | int rc; | |
211 | int oplock = FALSE; | |
212 | __u16 netfid; | |
213 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
86c96b4b | 214 | char buf[24]; |
d6e2f2a4 SF |
215 | unsigned int bytes_read; |
216 | char * pbuf; | |
217 | ||
218 | pbuf = buf; | |
219 | ||
220 | if(size == 0) { | |
221 | inode->i_mode |= S_IFIFO; | |
222 | return 0; | |
223 | } else if (size < 8) { | |
224 | return -EINVAL; /* EOPNOTSUPP? */ | |
225 | } | |
226 | ||
227 | rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ, | |
228 | CREATE_NOT_DIR, &netfid, &oplock, NULL, | |
229 | cifs_sb->local_nls, | |
230 | cifs_sb->mnt_cifs_flags & | |
231 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
232 | if (rc==0) { | |
ec637e3f | 233 | int buf_type = CIFS_NO_BUFFER; |
d6e2f2a4 SF |
234 | /* Read header */ |
235 | rc = CIFSSMBRead(xid, pTcon, | |
236 | netfid, | |
86c96b4b | 237 | 24 /* length */, 0 /* offset */, |
ec637e3f | 238 | &bytes_read, &pbuf, &buf_type); |
86c96b4b | 239 | if((rc == 0) && (bytes_read >= 8)) { |
9e294f1c SF |
240 | if(memcmp("IntxBLK", pbuf, 8) == 0) { |
241 | cFYI(1,("Block device")); | |
3020a1f5 | 242 | inode->i_mode |= S_IFBLK; |
86c96b4b SF |
243 | if(bytes_read == 24) { |
244 | /* we have enough to decode dev num */ | |
245 | __u64 mjr; /* major */ | |
246 | __u64 mnr; /* minor */ | |
247 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); | |
248 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); | |
249 | inode->i_rdev = MKDEV(mjr, mnr); | |
250 | } | |
9e294f1c SF |
251 | } else if(memcmp("IntxCHR", pbuf, 8) == 0) { |
252 | cFYI(1,("Char device")); | |
3020a1f5 | 253 | inode->i_mode |= S_IFCHR; |
86c96b4b SF |
254 | if(bytes_read == 24) { |
255 | /* we have enough to decode dev num */ | |
256 | __u64 mjr; /* major */ | |
257 | __u64 mnr; /* minor */ | |
258 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); | |
259 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); | |
260 | inode->i_rdev = MKDEV(mjr, mnr); | |
261 | } | |
9e294f1c SF |
262 | } else if(memcmp("IntxLNK", pbuf, 7) == 0) { |
263 | cFYI(1,("Symlink")); | |
3020a1f5 | 264 | inode->i_mode |= S_IFLNK; |
86c96b4b SF |
265 | } else { |
266 | inode->i_mode |= S_IFREG; /* file? */ | |
267 | rc = -EOPNOTSUPP; | |
268 | } | |
3020a1f5 SF |
269 | } else { |
270 | inode->i_mode |= S_IFREG; /* then it is a file */ | |
271 | rc = -EOPNOTSUPP; /* or some unknown SFU type */ | |
ec637e3f | 272 | } |
d6e2f2a4 | 273 | CIFSSMBClose(xid, pTcon, netfid); |
d6e2f2a4 SF |
274 | } |
275 | return rc; | |
276 | ||
277 | } | |
278 | ||
9e294f1c SF |
279 | #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */ |
280 | ||
281 | static int get_sfu_uid_mode(struct inode * inode, | |
282 | const unsigned char *path, | |
283 | struct cifs_sb_info *cifs_sb, int xid) | |
284 | { | |
3020a1f5 | 285 | #ifdef CONFIG_CIFS_XATTR |
9e294f1c SF |
286 | ssize_t rc; |
287 | char ea_value[4]; | |
288 | __u32 mode; | |
289 | ||
290 | rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS", | |
291 | ea_value, 4 /* size of buf */, cifs_sb->local_nls, | |
292 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
293 | if(rc < 0) | |
294 | return (int)rc; | |
295 | else if (rc > 3) { | |
296 | mode = le32_to_cpu(*((__le32 *)ea_value)); | |
c119b87d | 297 | inode->i_mode &= ~SFBITS_MASK; |
3020a1f5 | 298 | cFYI(1,("special bits 0%o org mode 0%o", mode, inode->i_mode)); |
9e294f1c SF |
299 | inode->i_mode = (mode & SFBITS_MASK) | inode->i_mode; |
300 | cFYI(1,("special mode bits 0%o", mode)); | |
301 | return 0; | |
302 | } else { | |
303 | return 0; | |
304 | } | |
3020a1f5 SF |
305 | #else |
306 | return -EOPNOTSUPP; | |
307 | #endif | |
308 | ||
9e294f1c SF |
309 | |
310 | } | |
311 | ||
1da177e4 LT |
312 | int cifs_get_inode_info(struct inode **pinode, |
313 | const unsigned char *search_path, FILE_ALL_INFO *pfindData, | |
314 | struct super_block *sb, int xid) | |
315 | { | |
316 | int rc = 0; | |
317 | struct cifsTconInfo *pTcon; | |
318 | struct inode *inode; | |
319 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
320 | char *tmp_path; | |
321 | char *buf = NULL; | |
322 | ||
323 | pTcon = cifs_sb->tcon; | |
d6e2f2a4 | 324 | cFYI(1,("Getting info on %s", search_path)); |
1da177e4 | 325 | |
d0d2f2df SF |
326 | if ((pfindData == NULL) && (*pinode != NULL)) { |
327 | if (CIFS_I(*pinode)->clientCanCacheRead) { | |
1da177e4 LT |
328 | cFYI(1,("No need to revalidate cached inode sizes")); |
329 | return rc; | |
330 | } | |
331 | } | |
332 | ||
333 | /* if file info not passed in then get it from server */ | |
d0d2f2df | 334 | if (pfindData == NULL) { |
1da177e4 | 335 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
d0d2f2df | 336 | if (buf == NULL) |
1da177e4 LT |
337 | return -ENOMEM; |
338 | pfindData = (FILE_ALL_INFO *)buf; | |
339 | /* could do find first instead but this returns more info */ | |
340 | rc = CIFSSMBQPathInfo(xid, pTcon, search_path, pfindData, | |
6b8edfe0 | 341 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
737b758c | 342 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
6b8edfe0 SF |
343 | /* BB optimize code so we do not make the above call |
344 | when server claims no NT SMB support and the above call | |
345 | failed at least once - set flag in tcon or mount */ | |
346 | if((rc == -EOPNOTSUPP) || (rc == -EINVAL)) { | |
347 | rc = SMBQueryInformation(xid, pTcon, search_path, | |
348 | pfindData, cifs_sb->local_nls, | |
349 | cifs_sb->mnt_cifs_flags & | |
350 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
351 | } | |
352 | ||
1da177e4 LT |
353 | } |
354 | /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */ | |
355 | if (rc) { | |
356 | if (rc == -EREMOTE) { | |
357 | tmp_path = | |
358 | kmalloc(strnlen | |
359 | (pTcon->treeName, | |
360 | MAX_TREE_SIZE + 1) + | |
361 | strnlen(search_path, MAX_PATHCONF) + 1, | |
362 | GFP_KERNEL); | |
363 | if (tmp_path == NULL) { | |
364 | kfree(buf); | |
365 | return -ENOMEM; | |
366 | } | |
367 | ||
368 | strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE); | |
369 | strncat(tmp_path, search_path, MAX_PATHCONF); | |
370 | rc = connect_to_dfs_path(xid, pTcon->ses, | |
371 | /* treename + */ tmp_path, | |
737b758c SF |
372 | cifs_sb->local_nls, |
373 | cifs_sb->mnt_cifs_flags & | |
374 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
375 | kfree(tmp_path); |
376 | /* BB fix up inode etc. */ | |
377 | } else if (rc) { | |
378 | kfree(buf); | |
379 | return rc; | |
380 | } | |
381 | } else { | |
382 | struct cifsInodeInfo *cifsInfo; | |
383 | __u32 attr = le32_to_cpu(pfindData->Attributes); | |
384 | ||
385 | /* get new inode */ | |
386 | if (*pinode == NULL) { | |
387 | *pinode = new_inode(sb); | |
388 | if (*pinode == NULL) | |
389 | return -ENOMEM; | |
390 | /* Is an i_ino of zero legal? Can we use that to check | |
391 | if the server supports returning inode numbers? Are | |
392 | there other sanity checks we can use to ensure that | |
393 | the server is really filling in that field? */ | |
394 | ||
395 | /* We can not use the IndexNumber field by default from | |
396 | Windows or Samba (in ALL_INFO buf) but we can request | |
397 | it explicitly. It may not be unique presumably if | |
398 | the server has multiple devices mounted under one | |
399 | share */ | |
400 | ||
401 | /* There may be higher info levels that work but are | |
402 | there Windows server or network appliances for which | |
403 | IndexNumber field is not guaranteed unique? */ | |
404 | ||
d0d2f2df | 405 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM){ |
1da177e4 LT |
406 | int rc1 = 0; |
407 | __u64 inode_num; | |
408 | ||
409 | rc1 = CIFSGetSrvInodeNumber(xid, pTcon, | |
410 | search_path, &inode_num, | |
737b758c SF |
411 | cifs_sb->local_nls, |
412 | cifs_sb->mnt_cifs_flags & | |
413 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
d0d2f2df | 414 | if (rc1) { |
1da177e4 LT |
415 | cFYI(1,("GetSrvInodeNum rc %d", rc1)); |
416 | /* BB EOPNOSUPP disable SERVER_INUM? */ | |
417 | } else /* do we need cast or hash to ino? */ | |
418 | (*pinode)->i_ino = inode_num; | |
419 | } /* else ino incremented to unique num in new_inode*/ | |
1da177e4 LT |
420 | insert_inode_hash(*pinode); |
421 | } | |
422 | inode = *pinode; | |
423 | cifsInfo = CIFS_I(inode); | |
424 | cifsInfo->cifsAttrs = attr; | |
26a21b98 | 425 | cFYI(1, ("Old time %ld", cifsInfo->time)); |
1da177e4 | 426 | cifsInfo->time = jiffies; |
26a21b98 | 427 | cFYI(1, ("New time %ld", cifsInfo->time)); |
1da177e4 LT |
428 | |
429 | /* blksize needs to be multiple of two. So safer to default to | |
430 | blksize and blkbits set in superblock so 2**blkbits and blksize | |
431 | will match rather than setting to: | |
432 | (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/ | |
433 | ||
26a21b98 | 434 | /* Linux can not store file creation time so ignore it */ |
1da177e4 LT |
435 | inode->i_atime = |
436 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime)); | |
437 | inode->i_mtime = | |
438 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime)); | |
439 | inode->i_ctime = | |
440 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime)); | |
26a21b98 | 441 | cFYI(0, ("Attributes came in as 0x%x", attr)); |
1da177e4 LT |
442 | |
443 | /* set default mode. will override for dirs below */ | |
444 | if (atomic_read(&cifsInfo->inUse) == 0) | |
445 | /* new inode, can safely set these fields */ | |
446 | inode->i_mode = cifs_sb->mnt_file_mode; | |
3020a1f5 SF |
447 | else /* since we set the inode type below we need to mask off |
448 | to avoid strange results if type changes and both get orred in */ | |
449 | inode->i_mode &= ~S_IFMT; | |
1da177e4 LT |
450 | /* if (attr & ATTR_REPARSE) */ |
451 | /* We no longer handle these as symlinks because we could not | |
452 | follow them due to the absolute path with drive letter */ | |
453 | if (attr & ATTR_DIRECTORY) { | |
454 | /* override default perms since we do not do byte range locking | |
455 | on dirs */ | |
456 | inode->i_mode = cifs_sb->mnt_dir_mode; | |
457 | inode->i_mode |= S_IFDIR; | |
eda3c029 SF |
458 | } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) && |
459 | (cifsInfo->cifsAttrs & ATTR_SYSTEM) && | |
460 | /* No need to le64 convert size of zero */ | |
461 | (pfindData->EndOfFile == 0)) { | |
462 | inode->i_mode = cifs_sb->mnt_file_mode; | |
463 | inode->i_mode |= S_IFIFO; | |
d6e2f2a4 SF |
464 | /* BB Finish for SFU style symlinks and devices */ |
465 | } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) && | |
466 | (cifsInfo->cifsAttrs & ATTR_SYSTEM)) { | |
467 | if (decode_sfu_inode(inode, | |
468 | le64_to_cpu(pfindData->EndOfFile), | |
469 | search_path, | |
470 | cifs_sb, xid)) { | |
471 | cFYI(1,("Unrecognized sfu inode type")); | |
472 | } | |
3020a1f5 | 473 | cFYI(1,("sfu mode 0%o",inode->i_mode)); |
1da177e4 LT |
474 | } else { |
475 | inode->i_mode |= S_IFREG; | |
476 | /* treat the dos attribute of read-only as read-only | |
477 | mode e.g. 555 */ | |
478 | if (cifsInfo->cifsAttrs & ATTR_READONLY) | |
479 | inode->i_mode &= ~(S_IWUGO); | |
480 | /* BB add code here - | |
481 | validate if device or weird share or device type? */ | |
482 | } | |
483 | if (is_size_safe_to_change(cifsInfo)) { | |
484 | /* can not safely change the file size here if the | |
485 | client is writing to it due to potential races */ | |
486 | i_size_write(inode,le64_to_cpu(pfindData->EndOfFile)); | |
487 | ||
488 | /* 512 bytes (2**9) is the fake blocksize that must be | |
489 | used for this calculation */ | |
490 | inode->i_blocks = (512 - 1 + le64_to_cpu( | |
491 | pfindData->AllocationSize)) >> 9; | |
492 | } | |
493 | ||
494 | inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks); | |
495 | ||
496 | /* BB fill in uid and gid here? with help from winbind? | |
497 | or retrieve from NTFS stream extended attribute */ | |
9e294f1c SF |
498 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { |
499 | /* fill in uid, gid, mode from server ACL */ | |
500 | get_sfu_uid_mode(inode, search_path, cifs_sb, xid); | |
501 | } else if (atomic_read(&cifsInfo->inUse) == 0) { | |
1da177e4 LT |
502 | inode->i_uid = cifs_sb->mnt_uid; |
503 | inode->i_gid = cifs_sb->mnt_gid; | |
504 | /* set so we do not keep refreshing these fields with | |
505 | bad data after user has changed them in memory */ | |
506 | atomic_set(&cifsInfo->inUse,1); | |
507 | } | |
508 | ||
509 | if (S_ISREG(inode->i_mode)) { | |
d6e2f2a4 | 510 | cFYI(1, ("File inode")); |
1da177e4 | 511 | inode->i_op = &cifs_file_inode_ops; |
8b94bcb9 SF |
512 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { |
513 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
514 | inode->i_fop = | |
515 | &cifs_file_direct_nobrl_ops; | |
516 | else | |
517 | inode->i_fop = &cifs_file_direct_ops; | |
518 | } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
519 | inode->i_fop = &cifs_file_nobrl_ops; | |
520 | else /* not direct, send byte range locks */ | |
1da177e4 | 521 | inode->i_fop = &cifs_file_ops; |
8b94bcb9 | 522 | |
bfa0d75a | 523 | if(pTcon->ses->server->maxBuf < |
273d81d6 DK |
524 | PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE) |
525 | inode->i_data.a_ops = &cifs_addr_ops_smallbuf; | |
526 | else | |
527 | inode->i_data.a_ops = &cifs_addr_ops; | |
1da177e4 | 528 | } else if (S_ISDIR(inode->i_mode)) { |
d6e2f2a4 | 529 | cFYI(1, ("Directory inode")); |
1da177e4 LT |
530 | inode->i_op = &cifs_dir_inode_ops; |
531 | inode->i_fop = &cifs_dir_ops; | |
532 | } else if (S_ISLNK(inode->i_mode)) { | |
d6e2f2a4 | 533 | cFYI(1, ("Symbolic Link inode")); |
1da177e4 LT |
534 | inode->i_op = &cifs_symlink_inode_ops; |
535 | } else { | |
536 | init_special_inode(inode, inode->i_mode, | |
537 | inode->i_rdev); | |
538 | } | |
539 | } | |
540 | kfree(buf); | |
541 | return rc; | |
542 | } | |
543 | ||
544 | /* gets root inode */ | |
545 | void cifs_read_inode(struct inode *inode) | |
546 | { | |
547 | int xid; | |
548 | struct cifs_sb_info *cifs_sb; | |
549 | ||
550 | cifs_sb = CIFS_SB(inode->i_sb); | |
551 | xid = GetXid(); | |
552 | if (cifs_sb->tcon->ses->capabilities & CAP_UNIX) | |
553 | cifs_get_inode_info_unix(&inode, "", inode->i_sb,xid); | |
554 | else | |
555 | cifs_get_inode_info(&inode, "", NULL, inode->i_sb,xid); | |
556 | /* can not call macro FreeXid here since in a void func */ | |
557 | _FreeXid(xid); | |
558 | } | |
559 | ||
560 | int cifs_unlink(struct inode *inode, struct dentry *direntry) | |
561 | { | |
562 | int rc = 0; | |
563 | int xid; | |
564 | struct cifs_sb_info *cifs_sb; | |
565 | struct cifsTconInfo *pTcon; | |
566 | char *full_path = NULL; | |
567 | struct cifsInodeInfo *cifsInode; | |
568 | FILE_BASIC_INFO *pinfo_buf; | |
569 | ||
06bcfedd | 570 | cFYI(1, ("cifs_unlink, inode = 0x%p", inode)); |
1da177e4 LT |
571 | |
572 | xid = GetXid(); | |
573 | ||
6910ab30 SF |
574 | if(inode) |
575 | cifs_sb = CIFS_SB(inode->i_sb); | |
576 | else | |
06bcfedd | 577 | cifs_sb = CIFS_SB(direntry->d_sb); |
1da177e4 LT |
578 | pTcon = cifs_sb->tcon; |
579 | ||
580 | /* Unlink can be called from rename so we can not grab the sem here | |
581 | since we deadlock otherwise */ | |
a11f3a05 | 582 | /* mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/ |
7f57356b | 583 | full_path = build_path_from_dentry(direntry); |
a11f3a05 | 584 | /* mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/ |
1da177e4 LT |
585 | if (full_path == NULL) { |
586 | FreeXid(xid); | |
587 | return -ENOMEM; | |
588 | } | |
737b758c SF |
589 | rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls, |
590 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
591 | |
592 | if (!rc) { | |
d0d2f2df | 593 | if (direntry->d_inode) |
b2aeb9d5 | 594 | direntry->d_inode->i_nlink--; |
1da177e4 LT |
595 | } else if (rc == -ENOENT) { |
596 | d_drop(direntry); | |
597 | } else if (rc == -ETXTBSY) { | |
598 | int oplock = FALSE; | |
599 | __u16 netfid; | |
600 | ||
601 | rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE, | |
602 | CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE, | |
737b758c SF |
603 | &netfid, &oplock, NULL, cifs_sb->local_nls, |
604 | cifs_sb->mnt_cifs_flags & | |
605 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
606 | if (rc==0) { |
607 | CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL, | |
737b758c SF |
608 | cifs_sb->local_nls, |
609 | cifs_sb->mnt_cifs_flags & | |
610 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 | 611 | CIFSSMBClose(xid, pTcon, netfid); |
d0d2f2df | 612 | if (direntry->d_inode) |
b2aeb9d5 | 613 | direntry->d_inode->i_nlink--; |
1da177e4 LT |
614 | } |
615 | } else if (rc == -EACCES) { | |
616 | /* try only if r/o attribute set in local lookup data? */ | |
a048d7a8 | 617 | pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL); |
1da177e4 | 618 | if (pinfo_buf) { |
1da177e4 LT |
619 | /* ATTRS set to normal clears r/o bit */ |
620 | pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL); | |
621 | if (!(pTcon->ses->flags & CIFS_SES_NT4)) | |
622 | rc = CIFSSMBSetTimes(xid, pTcon, full_path, | |
623 | pinfo_buf, | |
737b758c SF |
624 | cifs_sb->local_nls, |
625 | cifs_sb->mnt_cifs_flags & | |
626 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
627 | else |
628 | rc = -EOPNOTSUPP; | |
629 | ||
630 | if (rc == -EOPNOTSUPP) { | |
631 | int oplock = FALSE; | |
632 | __u16 netfid; | |
633 | /* rc = CIFSSMBSetAttrLegacy(xid, pTcon, | |
634 | full_path, | |
635 | (__u16)ATTR_NORMAL, | |
636 | cifs_sb->local_nls); | |
637 | For some strange reason it seems that NT4 eats the | |
638 | old setattr call without actually setting the | |
639 | attributes so on to the third attempted workaround | |
640 | */ | |
641 | ||
642 | /* BB could scan to see if we already have it open | |
643 | and pass in pid of opener to function */ | |
644 | rc = CIFSSMBOpen(xid, pTcon, full_path, | |
645 | FILE_OPEN, SYNCHRONIZE | | |
646 | FILE_WRITE_ATTRIBUTES, 0, | |
647 | &netfid, &oplock, NULL, | |
737b758c SF |
648 | cifs_sb->local_nls, |
649 | cifs_sb->mnt_cifs_flags & | |
650 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
651 | if (rc==0) { |
652 | rc = CIFSSMBSetFileTimes(xid, pTcon, | |
653 | pinfo_buf, | |
654 | netfid); | |
655 | CIFSSMBClose(xid, pTcon, netfid); | |
656 | } | |
657 | } | |
658 | kfree(pinfo_buf); | |
659 | } | |
660 | if (rc==0) { | |
737b758c SF |
661 | rc = CIFSSMBDelFile(xid, pTcon, full_path, |
662 | cifs_sb->local_nls, | |
663 | cifs_sb->mnt_cifs_flags & | |
664 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 | 665 | if (!rc) { |
d0d2f2df | 666 | if (direntry->d_inode) |
b2aeb9d5 | 667 | direntry->d_inode->i_nlink--; |
1da177e4 LT |
668 | } else if (rc == -ETXTBSY) { |
669 | int oplock = FALSE; | |
670 | __u16 netfid; | |
671 | ||
672 | rc = CIFSSMBOpen(xid, pTcon, full_path, | |
673 | FILE_OPEN, DELETE, | |
674 | CREATE_NOT_DIR | | |
675 | CREATE_DELETE_ON_CLOSE, | |
676 | &netfid, &oplock, NULL, | |
737b758c SF |
677 | cifs_sb->local_nls, |
678 | cifs_sb->mnt_cifs_flags & | |
679 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
680 | if (rc==0) { |
681 | CIFSSMBRenameOpenFile(xid, pTcon, | |
682 | netfid, NULL, | |
737b758c SF |
683 | cifs_sb->local_nls, |
684 | cifs_sb->mnt_cifs_flags & | |
685 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 | 686 | CIFSSMBClose(xid, pTcon, netfid); |
d0d2f2df | 687 | if (direntry->d_inode) |
b2aeb9d5 | 688 | direntry->d_inode->i_nlink--; |
1da177e4 LT |
689 | } |
690 | /* BB if rc = -ETXTBUSY goto the rename logic BB */ | |
691 | } | |
692 | } | |
693 | } | |
d0d2f2df | 694 | if (direntry->d_inode) { |
b2aeb9d5 SF |
695 | cifsInode = CIFS_I(direntry->d_inode); |
696 | cifsInode->time = 0; /* will force revalidate to get info | |
697 | when needed */ | |
698 | direntry->d_inode->i_ctime = current_fs_time(inode->i_sb); | |
699 | } | |
06bcfedd SF |
700 | if(inode) { |
701 | inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb); | |
702 | cifsInode = CIFS_I(inode); | |
703 | cifsInode->time = 0; /* force revalidate of dir as well */ | |
704 | } | |
1da177e4 LT |
705 | |
706 | kfree(full_path); | |
707 | FreeXid(xid); | |
708 | return rc; | |
709 | } | |
710 | ||
711 | int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode) | |
712 | { | |
713 | int rc = 0; | |
714 | int xid; | |
715 | struct cifs_sb_info *cifs_sb; | |
716 | struct cifsTconInfo *pTcon; | |
717 | char *full_path = NULL; | |
718 | struct inode *newinode = NULL; | |
719 | ||
6473a559 | 720 | cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode)); |
1da177e4 LT |
721 | |
722 | xid = GetXid(); | |
723 | ||
724 | cifs_sb = CIFS_SB(inode->i_sb); | |
725 | pTcon = cifs_sb->tcon; | |
726 | ||
7f57356b | 727 | full_path = build_path_from_dentry(direntry); |
1da177e4 LT |
728 | if (full_path == NULL) { |
729 | FreeXid(xid); | |
730 | return -ENOMEM; | |
731 | } | |
732 | /* BB add setting the equivalent of mode via CreateX w/ACLs */ | |
737b758c SF |
733 | rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls, |
734 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 | 735 | if (rc) { |
26a21b98 | 736 | cFYI(1, ("cifs_mkdir returned 0x%x", rc)); |
1da177e4 LT |
737 | d_drop(direntry); |
738 | } else { | |
739 | inode->i_nlink++; | |
740 | if (pTcon->ses->capabilities & CAP_UNIX) | |
741 | rc = cifs_get_inode_info_unix(&newinode, full_path, | |
742 | inode->i_sb,xid); | |
743 | else | |
744 | rc = cifs_get_inode_info(&newinode, full_path, NULL, | |
745 | inode->i_sb,xid); | |
746 | ||
b92327fe SF |
747 | if (pTcon->nocase) |
748 | direntry->d_op = &cifs_ci_dentry_ops; | |
749 | else | |
750 | direntry->d_op = &cifs_dentry_ops; | |
1da177e4 LT |
751 | d_instantiate(direntry, newinode); |
752 | if (direntry->d_inode) | |
753 | direntry->d_inode->i_nlink = 2; | |
754 | if (cifs_sb->tcon->ses->capabilities & CAP_UNIX) | |
d0d2f2df | 755 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
1da177e4 LT |
756 | CIFSSMBUnixSetPerms(xid, pTcon, full_path, |
757 | mode, | |
83451879 SF |
758 | (__u64)current->fsuid, |
759 | (__u64)current->fsgid, | |
1da177e4 | 760 | 0 /* dev_t */, |
737b758c SF |
761 | cifs_sb->local_nls, |
762 | cifs_sb->mnt_cifs_flags & | |
763 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
764 | } else { |
765 | CIFSSMBUnixSetPerms(xid, pTcon, full_path, | |
766 | mode, (__u64)-1, | |
767 | (__u64)-1, 0 /* dev_t */, | |
737b758c SF |
768 | cifs_sb->local_nls, |
769 | cifs_sb->mnt_cifs_flags & | |
770 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
771 | } |
772 | else { | |
773 | /* BB to be implemented via Windows secrty descriptors | |
774 | eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode, | |
775 | -1, -1, local_nls); */ | |
6473a559 SF |
776 | if(direntry->d_inode) { |
777 | direntry->d_inode->i_mode = mode; | |
25741b3e | 778 | direntry->d_inode->i_mode |= S_IFDIR; |
6473a559 SF |
779 | if(cifs_sb->mnt_cifs_flags & |
780 | CIFS_MOUNT_SET_UID) { | |
781 | direntry->d_inode->i_uid = | |
782 | current->fsuid; | |
783 | direntry->d_inode->i_gid = | |
784 | current->fsgid; | |
785 | } | |
786 | } | |
2a138ebb | 787 | } |
1da177e4 LT |
788 | } |
789 | kfree(full_path); | |
790 | FreeXid(xid); | |
791 | return rc; | |
792 | } | |
793 | ||
794 | int cifs_rmdir(struct inode *inode, struct dentry *direntry) | |
795 | { | |
796 | int rc = 0; | |
797 | int xid; | |
798 | struct cifs_sb_info *cifs_sb; | |
799 | struct cifsTconInfo *pTcon; | |
800 | char *full_path = NULL; | |
801 | struct cifsInodeInfo *cifsInode; | |
802 | ||
26a21b98 | 803 | cFYI(1, ("cifs_rmdir, inode = 0x%p", inode)); |
1da177e4 LT |
804 | |
805 | xid = GetXid(); | |
806 | ||
807 | cifs_sb = CIFS_SB(inode->i_sb); | |
808 | pTcon = cifs_sb->tcon; | |
809 | ||
7f57356b | 810 | full_path = build_path_from_dentry(direntry); |
1da177e4 LT |
811 | if (full_path == NULL) { |
812 | FreeXid(xid); | |
813 | return -ENOMEM; | |
814 | } | |
815 | ||
737b758c SF |
816 | rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls, |
817 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
818 | |
819 | if (!rc) { | |
820 | inode->i_nlink--; | |
821 | i_size_write(direntry->d_inode,0); | |
822 | direntry->d_inode->i_nlink = 0; | |
823 | } | |
824 | ||
825 | cifsInode = CIFS_I(direntry->d_inode); | |
826 | cifsInode->time = 0; /* force revalidate to go get info when | |
827 | needed */ | |
828 | direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime = | |
829 | current_fs_time(inode->i_sb); | |
830 | ||
831 | kfree(full_path); | |
832 | FreeXid(xid); | |
833 | return rc; | |
834 | } | |
835 | ||
836 | int cifs_rename(struct inode *source_inode, struct dentry *source_direntry, | |
837 | struct inode *target_inode, struct dentry *target_direntry) | |
838 | { | |
839 | char *fromName; | |
840 | char *toName; | |
841 | struct cifs_sb_info *cifs_sb_source; | |
842 | struct cifs_sb_info *cifs_sb_target; | |
843 | struct cifsTconInfo *pTcon; | |
844 | int xid; | |
845 | int rc = 0; | |
846 | ||
847 | xid = GetXid(); | |
848 | ||
849 | cifs_sb_target = CIFS_SB(target_inode->i_sb); | |
850 | cifs_sb_source = CIFS_SB(source_inode->i_sb); | |
851 | pTcon = cifs_sb_source->tcon; | |
852 | ||
853 | if (pTcon != cifs_sb_target->tcon) { | |
854 | FreeXid(xid); | |
855 | return -EXDEV; /* BB actually could be allowed if same server, | |
856 | but different share. | |
857 | Might eventually add support for this */ | |
858 | } | |
859 | ||
860 | /* we already have the rename sem so we do not need to grab it again | |
861 | here to protect the path integrity */ | |
7f57356b SF |
862 | fromName = build_path_from_dentry(source_direntry); |
863 | toName = build_path_from_dentry(target_direntry); | |
1da177e4 LT |
864 | if ((fromName == NULL) || (toName == NULL)) { |
865 | rc = -ENOMEM; | |
866 | goto cifs_rename_exit; | |
867 | } | |
868 | ||
869 | rc = CIFSSMBRename(xid, pTcon, fromName, toName, | |
737b758c SF |
870 | cifs_sb_source->local_nls, |
871 | cifs_sb_source->mnt_cifs_flags & | |
872 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
873 | if (rc == -EEXIST) { |
874 | /* check if they are the same file because rename of hardlinked | |
875 | files is a noop */ | |
876 | FILE_UNIX_BASIC_INFO *info_buf_source; | |
877 | FILE_UNIX_BASIC_INFO *info_buf_target; | |
878 | ||
879 | info_buf_source = | |
880 | kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL); | |
881 | if (info_buf_source != NULL) { | |
882 | info_buf_target = info_buf_source + 1; | |
883 | rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName, | |
737b758c SF |
884 | info_buf_source, cifs_sb_source->local_nls, |
885 | cifs_sb_source->mnt_cifs_flags & | |
886 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
887 | if (rc == 0) { |
888 | rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName, | |
889 | info_buf_target, | |
737b758c SF |
890 | cifs_sb_target->local_nls, |
891 | /* remap based on source sb */ | |
892 | cifs_sb_source->mnt_cifs_flags & | |
893 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
894 | } |
895 | if ((rc == 0) && | |
896 | (info_buf_source->UniqueId == | |
897 | info_buf_target->UniqueId)) { | |
898 | /* do not rename since the files are hardlinked which | |
899 | is a noop */ | |
900 | } else { | |
901 | /* we either can not tell the files are hardlinked | |
902 | (as with Windows servers) or files are not | |
903 | hardlinked so delete the target manually before | |
904 | renaming to follow POSIX rather than Windows | |
905 | semantics */ | |
906 | cifs_unlink(target_inode, target_direntry); | |
907 | rc = CIFSSMBRename(xid, pTcon, fromName, | |
908 | toName, | |
737b758c SF |
909 | cifs_sb_source->local_nls, |
910 | cifs_sb_source->mnt_cifs_flags | |
911 | & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
912 | } |
913 | kfree(info_buf_source); | |
914 | } /* if we can not get memory just leave rc as EEXIST */ | |
915 | } | |
916 | ||
917 | if (rc) { | |
918 | cFYI(1, ("rename rc %d", rc)); | |
919 | } | |
920 | ||
921 | if ((rc == -EIO) || (rc == -EEXIST)) { | |
922 | int oplock = FALSE; | |
923 | __u16 netfid; | |
924 | ||
925 | /* BB FIXME Is Generic Read correct for rename? */ | |
926 | /* if renaming directory - we should not say CREATE_NOT_DIR, | |
927 | need to test renaming open directory, also GENERIC_READ | |
928 | might not right be right access to request */ | |
929 | rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ, | |
930 | CREATE_NOT_DIR, &netfid, &oplock, NULL, | |
737b758c SF |
931 | cifs_sb_source->local_nls, |
932 | cifs_sb_source->mnt_cifs_flags & | |
933 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
934 | if (rc==0) { |
935 | CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName, | |
737b758c SF |
936 | cifs_sb_source->local_nls, |
937 | cifs_sb_source->mnt_cifs_flags & | |
938 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
939 | CIFSSMBClose(xid, pTcon, netfid); |
940 | } | |
941 | } | |
942 | ||
943 | cifs_rename_exit: | |
944 | kfree(fromName); | |
945 | kfree(toName); | |
946 | FreeXid(xid); | |
947 | return rc; | |
948 | } | |
949 | ||
950 | int cifs_revalidate(struct dentry *direntry) | |
951 | { | |
952 | int xid; | |
953 | int rc = 0; | |
954 | char *full_path; | |
955 | struct cifs_sb_info *cifs_sb; | |
956 | struct cifsInodeInfo *cifsInode; | |
957 | loff_t local_size; | |
958 | struct timespec local_mtime; | |
959 | int invalidate_inode = FALSE; | |
960 | ||
961 | if (direntry->d_inode == NULL) | |
962 | return -ENOENT; | |
963 | ||
964 | cifsInode = CIFS_I(direntry->d_inode); | |
965 | ||
966 | if (cifsInode == NULL) | |
967 | return -ENOENT; | |
968 | ||
969 | /* no sense revalidating inode info on file that no one can write */ | |
970 | if (CIFS_I(direntry->d_inode)->clientCanCacheRead) | |
971 | return rc; | |
972 | ||
973 | xid = GetXid(); | |
974 | ||
975 | cifs_sb = CIFS_SB(direntry->d_sb); | |
976 | ||
977 | /* can not safely grab the rename sem here if rename calls revalidate | |
978 | since that would deadlock */ | |
7f57356b | 979 | full_path = build_path_from_dentry(direntry); |
1da177e4 LT |
980 | if (full_path == NULL) { |
981 | FreeXid(xid); | |
982 | return -ENOMEM; | |
983 | } | |
984 | cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld " | |
985 | "jiffies %ld", full_path, direntry->d_inode, | |
986 | direntry->d_inode->i_count.counter, direntry, | |
987 | direntry->d_time, jiffies)); | |
988 | ||
989 | if (cifsInode->time == 0) { | |
990 | /* was set to zero previously to force revalidate */ | |
991 | } else if (time_before(jiffies, cifsInode->time + HZ) && | |
992 | lookupCacheEnabled) { | |
993 | if ((S_ISREG(direntry->d_inode->i_mode) == 0) || | |
994 | (direntry->d_inode->i_nlink == 1)) { | |
995 | kfree(full_path); | |
996 | FreeXid(xid); | |
997 | return rc; | |
998 | } else { | |
999 | cFYI(1, ("Have to revalidate file due to hardlinks")); | |
1000 | } | |
1001 | } | |
1002 | ||
1003 | /* save mtime and size */ | |
1004 | local_mtime = direntry->d_inode->i_mtime; | |
1005 | local_size = direntry->d_inode->i_size; | |
1006 | ||
1007 | if (cifs_sb->tcon->ses->capabilities & CAP_UNIX) { | |
1008 | rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path, | |
1009 | direntry->d_sb,xid); | |
1010 | if (rc) { | |
1011 | cFYI(1, ("error on getting revalidate info %d", rc)); | |
1012 | /* if (rc != -ENOENT) | |
1013 | rc = 0; */ /* BB should we cache info on | |
1014 | certain errors? */ | |
1015 | } | |
1016 | } else { | |
1017 | rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL, | |
1018 | direntry->d_sb,xid); | |
1019 | if (rc) { | |
1020 | cFYI(1, ("error on getting revalidate info %d", rc)); | |
1021 | /* if (rc != -ENOENT) | |
1022 | rc = 0; */ /* BB should we cache info on | |
1023 | certain errors? */ | |
1024 | } | |
1025 | } | |
1026 | /* should we remap certain errors, access denied?, to zero */ | |
1027 | ||
1028 | /* if not oplocked, we invalidate inode pages if mtime or file size | |
1029 | had changed on server */ | |
1030 | ||
1031 | if (timespec_equal(&local_mtime,&direntry->d_inode->i_mtime) && | |
1032 | (local_size == direntry->d_inode->i_size)) { | |
1033 | cFYI(1, ("cifs_revalidate - inode unchanged")); | |
1034 | } else { | |
1035 | /* file may have changed on server */ | |
1036 | if (cifsInode->clientCanCacheRead) { | |
1037 | /* no need to invalidate inode pages since we were the | |
1038 | only ones who could have modified the file and the | |
1039 | server copy is staler than ours */ | |
1040 | } else { | |
1041 | invalidate_inode = TRUE; | |
1042 | } | |
1043 | } | |
1044 | ||
1045 | /* can not grab this sem since kernel filesys locking documentation | |
1b1dcc1b JS |
1046 | indicates i_mutex may be taken by the kernel on lookup and rename |
1047 | which could deadlock if we grab the i_mutex here as well */ | |
1048 | /* mutex_lock(&direntry->d_inode->i_mutex);*/ | |
1da177e4 LT |
1049 | /* need to write out dirty pages here */ |
1050 | if (direntry->d_inode->i_mapping) { | |
1051 | /* do we need to lock inode until after invalidate completes | |
1052 | below? */ | |
1053 | filemap_fdatawrite(direntry->d_inode->i_mapping); | |
1054 | } | |
1055 | if (invalidate_inode) { | |
3abb9272 SF |
1056 | /* shrink_dcache not necessary now that cifs dentry ops |
1057 | are exported for negative dentries */ | |
1058 | /* if(S_ISDIR(direntry->d_inode->i_mode)) | |
1059 | shrink_dcache_parent(direntry); */ | |
1060 | if (S_ISREG(direntry->d_inode->i_mode)) { | |
1061 | if (direntry->d_inode->i_mapping) | |
1062 | filemap_fdatawait(direntry->d_inode->i_mapping); | |
1063 | /* may eventually have to do this for open files too */ | |
1064 | if (list_empty(&(cifsInode->openFileList))) { | |
1065 | /* changed on server - flush read ahead pages */ | |
1066 | cFYI(1, ("Invalidating read ahead data on " | |
1067 | "closed file")); | |
1068 | invalidate_remote_inode(direntry->d_inode); | |
1069 | } | |
1da177e4 LT |
1070 | } |
1071 | } | |
1b1dcc1b | 1072 | /* mutex_unlock(&direntry->d_inode->i_mutex); */ |
1da177e4 LT |
1073 | |
1074 | kfree(full_path); | |
1075 | FreeXid(xid); | |
1076 | return rc; | |
1077 | } | |
1078 | ||
1079 | int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
1080 | struct kstat *stat) | |
1081 | { | |
1082 | int err = cifs_revalidate(dentry); | |
1083 | if (!err) | |
1084 | generic_fillattr(dentry->d_inode, stat); | |
1085 | return err; | |
1086 | } | |
1087 | ||
1088 | static int cifs_truncate_page(struct address_space *mapping, loff_t from) | |
1089 | { | |
1090 | pgoff_t index = from >> PAGE_CACHE_SHIFT; | |
1091 | unsigned offset = from & (PAGE_CACHE_SIZE - 1); | |
1092 | struct page *page; | |
1093 | char *kaddr; | |
1094 | int rc = 0; | |
1095 | ||
1096 | page = grab_cache_page(mapping, index); | |
1097 | if (!page) | |
1098 | return -ENOMEM; | |
1099 | ||
1100 | kaddr = kmap_atomic(page, KM_USER0); | |
1101 | memset(kaddr + offset, 0, PAGE_CACHE_SIZE - offset); | |
1102 | flush_dcache_page(page); | |
1103 | kunmap_atomic(kaddr, KM_USER0); | |
1104 | unlock_page(page); | |
1105 | page_cache_release(page); | |
1106 | return rc; | |
1107 | } | |
1108 | ||
1109 | int cifs_setattr(struct dentry *direntry, struct iattr *attrs) | |
1110 | { | |
1111 | int xid; | |
1112 | struct cifs_sb_info *cifs_sb; | |
1113 | struct cifsTconInfo *pTcon; | |
1114 | char *full_path = NULL; | |
1115 | int rc = -EACCES; | |
1da177e4 LT |
1116 | struct cifsFileInfo *open_file = NULL; |
1117 | FILE_BASIC_INFO time_buf; | |
1118 | int set_time = FALSE; | |
1119 | __u64 mode = 0xFFFFFFFFFFFFFFFFULL; | |
1120 | __u64 uid = 0xFFFFFFFFFFFFFFFFULL; | |
1121 | __u64 gid = 0xFFFFFFFFFFFFFFFFULL; | |
1122 | struct cifsInodeInfo *cifsInode; | |
1da177e4 LT |
1123 | |
1124 | xid = GetXid(); | |
1125 | ||
3979877e | 1126 | cFYI(1, ("setattr on file %s attrs->iavalid 0x%x", |
1da177e4 | 1127 | direntry->d_name.name, attrs->ia_valid)); |
6473a559 | 1128 | |
1da177e4 LT |
1129 | cifs_sb = CIFS_SB(direntry->d_inode->i_sb); |
1130 | pTcon = cifs_sb->tcon; | |
1131 | ||
2a138ebb | 1132 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) { |
6473a559 SF |
1133 | /* check if we have permission to change attrs */ |
1134 | rc = inode_change_ok(direntry->d_inode, attrs); | |
1135 | if(rc < 0) { | |
1136 | FreeXid(xid); | |
1137 | return rc; | |
1138 | } else | |
1139 | rc = 0; | |
1140 | } | |
1141 | ||
7f57356b | 1142 | full_path = build_path_from_dentry(direntry); |
1da177e4 LT |
1143 | if (full_path == NULL) { |
1144 | FreeXid(xid); | |
1145 | return -ENOMEM; | |
1146 | } | |
1147 | cifsInode = CIFS_I(direntry->d_inode); | |
1148 | ||
1149 | /* BB check if we need to refresh inode from server now ? BB */ | |
1150 | ||
1151 | /* need to flush data before changing file size on server */ | |
28fd1298 | 1152 | filemap_write_and_wait(direntry->d_inode->i_mapping); |
1da177e4 LT |
1153 | |
1154 | if (attrs->ia_valid & ATTR_SIZE) { | |
1da177e4 LT |
1155 | /* To avoid spurious oplock breaks from server, in the case of |
1156 | inodes that we already have open, avoid doing path based | |
1157 | setting of file size if we can do it by handle. | |
1158 | This keeps our caching token (oplock) and avoids timeouts | |
1159 | when the local oplock break takes longer to flush | |
1160 | writebehind data than the SMB timeout for the SetPathInfo | |
1161 | request would allow */ | |
3979877e | 1162 | |
6148a742 SF |
1163 | open_file = find_writable_file(cifsInode); |
1164 | if (open_file) { | |
1165 | __u16 nfid = open_file->netfid; | |
1166 | __u32 npid = open_file->pid; | |
1167 | rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size, | |
1168 | nfid, npid, FALSE); | |
23e7dd7d | 1169 | atomic_dec(&open_file->wrtPending); |
6148a742 | 1170 | cFYI(1,("SetFSize for attrs rc = %d", rc)); |
083d3a2c | 1171 | if((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { |
6148a742 SF |
1172 | int bytes_written; |
1173 | rc = CIFSSMBWrite(xid, pTcon, | |
1174 | nfid, 0, attrs->ia_size, | |
1175 | &bytes_written, NULL, NULL, | |
1176 | 1 /* 45 seconds */); | |
1177 | cFYI(1,("Wrt seteof rc %d", rc)); | |
1da177e4 | 1178 | } |
6473a559 SF |
1179 | } else |
1180 | rc = -EINVAL; | |
1181 | ||
1da177e4 LT |
1182 | if (rc != 0) { |
1183 | /* Set file size by pathname rather than by handle | |
1184 | either because no valid, writeable file handle for | |
1185 | it was found or because there was an error setting | |
1186 | it by handle */ | |
1187 | rc = CIFSSMBSetEOF(xid, pTcon, full_path, | |
1188 | attrs->ia_size, FALSE, | |
737b758c SF |
1189 | cifs_sb->local_nls, |
1190 | cifs_sb->mnt_cifs_flags & | |
1191 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
e30dcf3a | 1192 | cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc)); |
083d3a2c | 1193 | if((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { |
e30dcf3a SF |
1194 | __u16 netfid; |
1195 | int oplock = FALSE; | |
1196 | ||
1197 | rc = SMBLegacyOpen(xid, pTcon, full_path, | |
1198 | FILE_OPEN, | |
1199 | SYNCHRONIZE | FILE_WRITE_ATTRIBUTES, | |
1200 | CREATE_NOT_DIR, &netfid, &oplock, | |
1201 | NULL, cifs_sb->local_nls, | |
1202 | cifs_sb->mnt_cifs_flags & | |
1203 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1204 | if (rc==0) { | |
1205 | int bytes_written; | |
1206 | rc = CIFSSMBWrite(xid, pTcon, | |
1207 | netfid, 0, | |
1208 | attrs->ia_size, | |
1209 | &bytes_written, NULL, | |
1210 | NULL, 1 /* 45 sec */); | |
1211 | cFYI(1,("wrt seteof rc %d",rc)); | |
1212 | CIFSSMBClose(xid, pTcon, netfid); | |
1213 | } | |
1214 | ||
1215 | } | |
1da177e4 LT |
1216 | } |
1217 | ||
1218 | /* Server is ok setting allocation size implicitly - no need | |
1219 | to call: | |
1220 | CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE, | |
1221 | cifs_sb->local_nls); | |
1222 | */ | |
1223 | ||
1224 | if (rc == 0) { | |
1225 | rc = vmtruncate(direntry->d_inode, attrs->ia_size); | |
1226 | cifs_truncate_page(direntry->d_inode->i_mapping, | |
1227 | direntry->d_inode->i_size); | |
e30dcf3a SF |
1228 | } else |
1229 | goto cifs_setattr_exit; | |
1da177e4 LT |
1230 | } |
1231 | if (attrs->ia_valid & ATTR_UID) { | |
e30dcf3a | 1232 | cFYI(1, ("UID changed to %d", attrs->ia_uid)); |
1da177e4 | 1233 | uid = attrs->ia_uid; |
1da177e4 LT |
1234 | } |
1235 | if (attrs->ia_valid & ATTR_GID) { | |
e30dcf3a | 1236 | cFYI(1, ("GID changed to %d", attrs->ia_gid)); |
1da177e4 | 1237 | gid = attrs->ia_gid; |
1da177e4 LT |
1238 | } |
1239 | ||
1240 | time_buf.Attributes = 0; | |
1241 | if (attrs->ia_valid & ATTR_MODE) { | |
e30dcf3a | 1242 | cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode)); |
1da177e4 | 1243 | mode = attrs->ia_mode; |
1da177e4 LT |
1244 | } |
1245 | ||
1246 | if ((cifs_sb->tcon->ses->capabilities & CAP_UNIX) | |
1247 | && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID))) | |
1248 | rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid, | |
737b758c SF |
1249 | 0 /* dev_t */, cifs_sb->local_nls, |
1250 | cifs_sb->mnt_cifs_flags & | |
1251 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 | 1252 | else if (attrs->ia_valid & ATTR_MODE) { |
cdbce9c8 | 1253 | rc = 0; |
1da177e4 LT |
1254 | if ((mode & S_IWUGO) == 0) /* not writeable */ { |
1255 | if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0) | |
1256 | time_buf.Attributes = | |
1257 | cpu_to_le32(cifsInode->cifsAttrs | | |
1258 | ATTR_READONLY); | |
1259 | } else if ((mode & S_IWUGO) == S_IWUGO) { | |
1260 | if (cifsInode->cifsAttrs & ATTR_READONLY) | |
1261 | time_buf.Attributes = | |
1262 | cpu_to_le32(cifsInode->cifsAttrs & | |
1263 | (~ATTR_READONLY)); | |
1264 | } | |
1265 | /* BB to be implemented - | |
1266 | via Windows security descriptors or streams */ | |
1267 | /* CIFSSMBWinSetPerms(xid, pTcon, full_path, mode, uid, gid, | |
1268 | cifs_sb->local_nls); */ | |
1269 | } | |
1270 | ||
1271 | if (attrs->ia_valid & ATTR_ATIME) { | |
1272 | set_time = TRUE; | |
1273 | time_buf.LastAccessTime = | |
1274 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime)); | |
1275 | } else | |
1276 | time_buf.LastAccessTime = 0; | |
1277 | ||
1278 | if (attrs->ia_valid & ATTR_MTIME) { | |
1279 | set_time = TRUE; | |
1280 | time_buf.LastWriteTime = | |
1281 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime)); | |
1282 | } else | |
1283 | time_buf.LastWriteTime = 0; | |
e30dcf3a SF |
1284 | /* Do not set ctime explicitly unless other time |
1285 | stamps are changed explicitly (i.e. by utime() | |
1286 | since we would then have a mix of client and | |
1287 | server times */ | |
1288 | ||
1289 | if (set_time && (attrs->ia_valid & ATTR_CTIME)) { | |
1da177e4 | 1290 | set_time = TRUE; |
e30dcf3a SF |
1291 | /* Although Samba throws this field away |
1292 | it may be useful to Windows - but we do | |
1293 | not want to set ctime unless some other | |
1294 | timestamp is changing */ | |
26a21b98 | 1295 | cFYI(1, ("CIFS - CTIME changed")); |
1da177e4 LT |
1296 | time_buf.ChangeTime = |
1297 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime)); | |
1298 | } else | |
1299 | time_buf.ChangeTime = 0; | |
1300 | ||
1301 | if (set_time || time_buf.Attributes) { | |
1da177e4 LT |
1302 | time_buf.CreationTime = 0; /* do not change */ |
1303 | /* In the future we should experiment - try setting timestamps | |
1304 | via Handle (SetFileInfo) instead of by path */ | |
1305 | if (!(pTcon->ses->flags & CIFS_SES_NT4)) | |
1306 | rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf, | |
737b758c SF |
1307 | cifs_sb->local_nls, |
1308 | cifs_sb->mnt_cifs_flags & | |
1309 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
1310 | else |
1311 | rc = -EOPNOTSUPP; | |
1312 | ||
1313 | if (rc == -EOPNOTSUPP) { | |
1314 | int oplock = FALSE; | |
1315 | __u16 netfid; | |
1316 | ||
1317 | cFYI(1, ("calling SetFileInfo since SetPathInfo for " | |
1318 | "times not supported by this server")); | |
1319 | /* BB we could scan to see if we already have it open | |
1320 | and pass in pid of opener to function */ | |
1321 | rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, | |
1322 | SYNCHRONIZE | FILE_WRITE_ATTRIBUTES, | |
1323 | CREATE_NOT_DIR, &netfid, &oplock, | |
737b758c SF |
1324 | NULL, cifs_sb->local_nls, |
1325 | cifs_sb->mnt_cifs_flags & | |
1326 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
1327 | if (rc==0) { |
1328 | rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf, | |
1329 | netfid); | |
1330 | CIFSSMBClose(xid, pTcon, netfid); | |
1331 | } else { | |
1332 | /* BB For even older servers we could convert time_buf | |
1333 | into old DOS style which uses two second | |
1334 | granularity */ | |
1335 | ||
1336 | /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path, | |
1337 | &time_buf, cifs_sb->local_nls); */ | |
1338 | } | |
1339 | } | |
e30dcf3a SF |
1340 | /* Even if error on time set, no sense failing the call if |
1341 | the server would set the time to a reasonable value anyway, | |
1342 | and this check ensures that we are not being called from | |
1343 | sys_utimes in which case we ought to fail the call back to | |
1344 | the user when the server rejects the call */ | |
1345 | if((rc) && (attrs->ia_valid && | |
1346 | (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE))) | |
1347 | rc = 0; | |
1da177e4 LT |
1348 | } |
1349 | ||
1350 | /* do not need local check to inode_check_ok since the server does | |
1351 | that */ | |
1352 | if (!rc) | |
1353 | rc = inode_setattr(direntry->d_inode, attrs); | |
e30dcf3a | 1354 | cifs_setattr_exit: |
1da177e4 LT |
1355 | kfree(full_path); |
1356 | FreeXid(xid); | |
1357 | return rc; | |
1358 | } | |
1359 | ||
1360 | void cifs_delete_inode(struct inode *inode) | |
1361 | { | |
26a21b98 | 1362 | cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode)); |
1da177e4 LT |
1363 | /* may have to add back in if and when safe distributed caching of |
1364 | directories added e.g. via FindNotify */ | |
1365 | } |