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[CIFS] Vectored and async i/o turned on and correct the
[linux-2.6-block.git] / fs / cifs / inode.c
CommitLineData
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
33int 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;
44 cFYI(1, (" Getting info on %s ", search_path));
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
d6e2f2a4 100 cFYI(1, ("Old time %ld ", cifsInfo->time));
1da177e4 101 cifsInfo->time = jiffies;
d6e2f2a4 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);
114 if (type == UNIX_FILE) {
115 inode->i_mode |= S_IFREG;
116 } else if (type == UNIX_SYMLINK) {
117 inode->i_mode |= S_IFLNK;
118 } else if (type == UNIX_DIR) {
119 inode->i_mode |= S_IFDIR;
120 } else if (type == UNIX_CHARDEV) {
121 inode->i_mode |= S_IFCHR;
122 inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
123 le64_to_cpu(findData.DevMinor) & MINORMASK);
124 } else if (type == UNIX_BLOCKDEV) {
125 inode->i_mode |= S_IFBLK;
126 inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
127 le64_to_cpu(findData.DevMinor) & MINORMASK);
128 } else if (type == UNIX_FIFO) {
129 inode->i_mode |= S_IFIFO;
130 } else if (type == UNIX_SOCKET) {
131 inode->i_mode |= S_IFSOCK;
132 }
133 inode->i_uid = le64_to_cpu(findData.Uid);
134 inode->i_gid = le64_to_cpu(findData.Gid);
135 inode->i_nlink = le64_to_cpu(findData.Nlinks);
136
d0d2f2df 137 if (is_size_safe_to_change(cifsInfo)) {
1da177e4
LT		 138 /* can not safely change the file size here if the
139 client is writing to it due to potential races */
140
141 i_size_write(inode, end_of_file);
142
143 /* blksize needs to be multiple of two. So safer to default to
144 blksize and blkbits set in superblock so 2**blkbits and blksize
145 will match rather than setting to:
146 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
147
148 /* This seems incredibly stupid but it turns out that i_blocks
149 is not related to (i_size / i_blksize), instead 512 byte size
150 is required for calculating num blocks */
151
152 /* 512 bytes (2**9) is the fake blocksize that must be used */
153 /* for this calculation */
154 inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
155 }
156
157 if (num_of_bytes < end_of_file)
8b94bcb9 158 cFYI(1, ("allocation size less than end of file"));
1da177e4
LT		 159 cFYI(1,
160 ("Size %ld and blocks %ld",
161 (unsigned long) inode->i_size, inode->i_blocks));
162 if (S_ISREG(inode->i_mode)) {
8b94bcb9 163 cFYI(1, ("File inode"));
1da177e4 164 inode->i_op = &cifs_file_inode_ops;
8b94bcb9
SF		 165 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
166 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
167 inode->i_fop =
168 &cifs_file_direct_nobrl_ops;
169 else
170 inode->i_fop = &cifs_file_direct_ops;
171 } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
172 inode->i_fop = &cifs_file_nobrl_ops;
173 else /* not direct, send byte range locks */
1da177e4 174 inode->i_fop = &cifs_file_ops;
8b94bcb9 175
1da177e4 176 inode->i_data.a_ops = &cifs_addr_ops;
bfa0d75a
SF		 177 /* check if server can support readpages */
178 if(pTcon->ses->server->maxBuf <
179 4096 + MAX_CIFS_HDR_SIZE)
180 inode->i_data.a_ops->readpages = NULL;
1da177e4 181 } else if (S_ISDIR(inode->i_mode)) {
8b94bcb9 182 cFYI(1, ("Directory inode"));
1da177e4
LT		 183 inode->i_op = &cifs_dir_inode_ops;
184 inode->i_fop = &cifs_dir_ops;
185 } else if (S_ISLNK(inode->i_mode)) {
8b94bcb9 186 cFYI(1, ("Symbolic Link inode"));
1da177e4
LT		 187 inode->i_op = &cifs_symlink_inode_ops;
188 /* tmp_inode->i_fop = */ /* do not need to set to anything */
189 } else {
8b94bcb9 190 cFYI(1, ("Init special inode"));
1da177e4
LT		 191 init_special_inode(inode, inode->i_mode,
192 inode->i_rdev);
193 }
194 }
195 return rc;
196}
197
d6e2f2a4
SF		 198static int decode_sfu_inode(struct inode * inode, __u64 size,
199 const unsigned char *path,
200 struct cifs_sb_info *cifs_sb, int xid)
201{
202 int rc;
203 int oplock = FALSE;
204 __u16 netfid;
205 struct cifsTconInfo *pTcon = cifs_sb->tcon;
206 char buf[8];
207 unsigned int bytes_read;
208 char * pbuf;
209
210 pbuf = buf;
211
212 if(size == 0) {
213 inode->i_mode |= S_IFIFO;
214 return 0;
215 } else if (size < 8) {
216 return -EINVAL; /* EOPNOTSUPP? */
217 }
218
219 rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ,
220 CREATE_NOT_DIR, &netfid, &oplock, NULL,
221 cifs_sb->local_nls,
222 cifs_sb->mnt_cifs_flags &
223 CIFS_MOUNT_MAP_SPECIAL_CHR);
224 if (rc==0) {
225 /* Read header */
226 rc = CIFSSMBRead(xid, pTcon,
227 netfid,
228 8 /* length */, 0 /* offset */,
229 &bytes_read, &pbuf);
230 if((rc == 0) && (bytes_read == 8)) {
9e294f1c
SF		 231 cERROR(1,("intx %s" ,pbuf));
232 if(memcmp("IntxBLK", pbuf, 8) == 0) {
233 cFYI(1,("Block device"));
234 inode->i_mode = S_IFBLK;
235 } else if(memcmp("IntxCHR", pbuf, 8) == 0) {
236 cFYI(1,("Char device"));
237 inode->i_mode = S_IFCHR;
238 } else if(memcmp("IntxLNK", pbuf, 7) == 0) {
239 cFYI(1,("Symlink"));
240 inode->i_mode = S_IFLNK;
241 } else
242 inode->i_mode = S_IFREG; /* then it is a file */
243 rc = -EOPNOTSUPP; /* or some unknown SFU type */
244
d6e2f2a4
SF		 245 }
246
247 CIFSSMBClose(xid, pTcon, netfid);
248
249
250 /* inode->i_rdev = MKDEV(le64_to_cpu(DevMajor),
251 le64_to_cpu(DevMinor) & MINORMASK);*/
252/* inode->i_mode |= S_IFBLK; */
253 }
254 return rc;
255
256}
257
9e294f1c
SF		 258#define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
259
260static int get_sfu_uid_mode(struct inode * inode,
261 const unsigned char *path,
262 struct cifs_sb_info *cifs_sb, int xid)
263{
264 ssize_t rc;
265 char ea_value[4];
266 __u32 mode;
267
268 rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS",
269 ea_value, 4 /* size of buf */, cifs_sb->local_nls,
270 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
271 if(rc < 0)
272 return (int)rc;
273 else if (rc > 3) {
274 mode = le32_to_cpu(*((__le32 *)ea_value));
275 inode->i_mode = (mode & SFBITS_MASK) | inode->i_mode;
276 cFYI(1,("special mode bits 0%o", mode));
277 return 0;
278 } else {
279 return 0;
280 }
281
282}
283
1da177e4
LT		 284int cifs_get_inode_info(struct inode **pinode,
285 const unsigned char *search_path, FILE_ALL_INFO *pfindData,
286 struct super_block *sb, int xid)
287{
288 int rc = 0;
289 struct cifsTconInfo *pTcon;
290 struct inode *inode;
291 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
292 char *tmp_path;
293 char *buf = NULL;
294
295 pTcon = cifs_sb->tcon;
d6e2f2a4 296 cFYI(1,("Getting info on %s", search_path));
1da177e4 297
d0d2f2df
SF		 298 if ((pfindData == NULL) && (*pinode != NULL)) {
299 if (CIFS_I(*pinode)->clientCanCacheRead) {
1da177e4
LT		 300 cFYI(1,("No need to revalidate cached inode sizes"));
301 return rc;
302 }
303 }
304
305 /* if file info not passed in then get it from server */
d0d2f2df 306 if (pfindData == NULL) {
1da177e4 307 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
d0d2f2df 308 if (buf == NULL)
1da177e4
LT		 309 return -ENOMEM;
310 pfindData = (FILE_ALL_INFO *)buf;
311 /* could do find first instead but this returns more info */
312 rc = CIFSSMBQPathInfo(xid, pTcon, search_path, pfindData,
6b8edfe0 313 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
737b758c 314 CIFS_MOUNT_MAP_SPECIAL_CHR);
6b8edfe0
SF		 315 /* BB optimize code so we do not make the above call
316 when server claims no NT SMB support and the above call
317 failed at least once - set flag in tcon or mount */
318 if((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
319 rc = SMBQueryInformation(xid, pTcon, search_path,
320 pfindData, cifs_sb->local_nls,
321 cifs_sb->mnt_cifs_flags &
322 CIFS_MOUNT_MAP_SPECIAL_CHR);
323 }
324
1da177e4
LT		 325 }
326 /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
327 if (rc) {
328 if (rc == -EREMOTE) {
329 tmp_path =
330 kmalloc(strnlen
331 (pTcon->treeName,
332 MAX_TREE_SIZE + 1) +
333 strnlen(search_path, MAX_PATHCONF) + 1,
334 GFP_KERNEL);
335 if (tmp_path == NULL) {
336 kfree(buf);
337 return -ENOMEM;
338 }
339
340 strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
341 strncat(tmp_path, search_path, MAX_PATHCONF);
342 rc = connect_to_dfs_path(xid, pTcon->ses,
343 /* treename + */ tmp_path,
737b758c
SF		 344 cifs_sb->local_nls,
345 cifs_sb->mnt_cifs_flags &
346 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 347 kfree(tmp_path);
348 /* BB fix up inode etc. */
349 } else if (rc) {
350 kfree(buf);
351 return rc;
352 }
353 } else {
354 struct cifsInodeInfo *cifsInfo;
355 __u32 attr = le32_to_cpu(pfindData->Attributes);
356
357 /* get new inode */
358 if (*pinode == NULL) {
359 *pinode = new_inode(sb);
360 if (*pinode == NULL)
361 return -ENOMEM;
362 /* Is an i_ino of zero legal? Can we use that to check
363 if the server supports returning inode numbers? Are
364 there other sanity checks we can use to ensure that
365 the server is really filling in that field? */
366
367 /* We can not use the IndexNumber field by default from
368 Windows or Samba (in ALL_INFO buf) but we can request
369 it explicitly. It may not be unique presumably if
370 the server has multiple devices mounted under one
371 share */
372
373 /* There may be higher info levels that work but are
374 there Windows server or network appliances for which
375 IndexNumber field is not guaranteed unique? */
376
d0d2f2df 377 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM){
1da177e4
LT		 378 int rc1 = 0;
379 __u64 inode_num;
380
381 rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
382 search_path, &inode_num,
737b758c
SF		 383 cifs_sb->local_nls,
384 cifs_sb->mnt_cifs_flags &
385 CIFS_MOUNT_MAP_SPECIAL_CHR);
d0d2f2df 386 if (rc1) {
1da177e4
LT		 387 cFYI(1,("GetSrvInodeNum rc %d", rc1));
388 /* BB EOPNOSUPP disable SERVER_INUM? */
389 } else /* do we need cast or hash to ino? */
390 (*pinode)->i_ino = inode_num;
391 } /* else ino incremented to unique num in new_inode*/
1da177e4
LT		 392 insert_inode_hash(*pinode);
393 }
394 inode = *pinode;
395 cifsInfo = CIFS_I(inode);
396 cifsInfo->cifsAttrs = attr;
397 cFYI(1, (" Old time %ld ", cifsInfo->time));
398 cifsInfo->time = jiffies;
399 cFYI(1, (" New time %ld ", cifsInfo->time));
400
401 /* blksize needs to be multiple of two. So safer to default to
402 blksize and blkbits set in superblock so 2**blkbits and blksize
403 will match rather than setting to:
404 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
405
406 /* Linux can not store file creation time unfortunately so we ignore it */
407 inode->i_atime =
408 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
409 inode->i_mtime =
410 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
411 inode->i_ctime =
412 cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
413 cFYI(0, (" Attributes came in as 0x%x ", attr));
414
415 /* set default mode. will override for dirs below */
416 if (atomic_read(&cifsInfo->inUse) == 0)
417 /* new inode, can safely set these fields */
418 inode->i_mode = cifs_sb->mnt_file_mode;
419
420/* if (attr & ATTR_REPARSE) */
421 /* We no longer handle these as symlinks because we could not
422 follow them due to the absolute path with drive letter */
423 if (attr & ATTR_DIRECTORY) {
424 /* override default perms since we do not do byte range locking
425 on dirs */
426 inode->i_mode = cifs_sb->mnt_dir_mode;
427 inode->i_mode |= S_IFDIR;
eda3c029
SF		 428 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
429 (cifsInfo->cifsAttrs & ATTR_SYSTEM) &&
430 /* No need to le64 convert size of zero */
431 (pfindData->EndOfFile == 0)) {
432 inode->i_mode = cifs_sb->mnt_file_mode;
433 inode->i_mode |= S_IFIFO;
d6e2f2a4
SF		 434/* BB Finish for SFU style symlinks and devices */
435 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
436 (cifsInfo->cifsAttrs & ATTR_SYSTEM)) {
437 if (decode_sfu_inode(inode,
438 le64_to_cpu(pfindData->EndOfFile),
439 search_path,
440 cifs_sb, xid)) {
441 cFYI(1,("Unrecognized sfu inode type"));
442 }
1da177e4
LT		 443 } else {
444 inode->i_mode |= S_IFREG;
445 /* treat the dos attribute of read-only as read-only
446 mode e.g. 555 */
447 if (cifsInfo->cifsAttrs & ATTR_READONLY)
448 inode->i_mode &= ~(S_IWUGO);
449 /* BB add code here -
450 validate if device or weird share or device type? */
451 }
452 if (is_size_safe_to_change(cifsInfo)) {
453 /* can not safely change the file size here if the
454 client is writing to it due to potential races */
455 i_size_write(inode,le64_to_cpu(pfindData->EndOfFile));
456
457 /* 512 bytes (2**9) is the fake blocksize that must be
458 used for this calculation */
459 inode->i_blocks = (512 - 1 + le64_to_cpu(
460 pfindData->AllocationSize)) >> 9;
461 }
462
463 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
464
465 /* BB fill in uid and gid here? with help from winbind?
466 or retrieve from NTFS stream extended attribute */
9e294f1c
SF		 467 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
468 /* fill in uid, gid, mode from server ACL */
469 get_sfu_uid_mode(inode, search_path, cifs_sb, xid);
470 } else if (atomic_read(&cifsInfo->inUse) == 0) {
1da177e4
LT		 471 inode->i_uid = cifs_sb->mnt_uid;
472 inode->i_gid = cifs_sb->mnt_gid;
473 /* set so we do not keep refreshing these fields with
474 bad data after user has changed them in memory */
475 atomic_set(&cifsInfo->inUse,1);
476 }
477
478 if (S_ISREG(inode->i_mode)) {
d6e2f2a4 479 cFYI(1, ("File inode"));
1da177e4 480 inode->i_op = &cifs_file_inode_ops;
8b94bcb9
SF		 481 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
482 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
483 inode->i_fop =
484 &cifs_file_direct_nobrl_ops;
485 else
486 inode->i_fop = &cifs_file_direct_ops;
487 } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
488 inode->i_fop = &cifs_file_nobrl_ops;
489 else /* not direct, send byte range locks */
1da177e4 490 inode->i_fop = &cifs_file_ops;
8b94bcb9 491
1da177e4 492 inode->i_data.a_ops = &cifs_addr_ops;
bfa0d75a
SF		 493 if(pTcon->ses->server->maxBuf <
494 4096 + MAX_CIFS_HDR_SIZE)
495 inode->i_data.a_ops->readpages = NULL;
1da177e4 496 } else if (S_ISDIR(inode->i_mode)) {
d6e2f2a4 497 cFYI(1, ("Directory inode"));
1da177e4
LT		 498 inode->i_op = &cifs_dir_inode_ops;
499 inode->i_fop = &cifs_dir_ops;
500 } else if (S_ISLNK(inode->i_mode)) {
d6e2f2a4 501 cFYI(1, ("Symbolic Link inode"));
1da177e4
LT		 502 inode->i_op = &cifs_symlink_inode_ops;
503 } else {
504 init_special_inode(inode, inode->i_mode,
505 inode->i_rdev);
506 }
507 }
508 kfree(buf);
509 return rc;
510}
511
512/* gets root inode */
513void cifs_read_inode(struct inode *inode)
514{
515 int xid;
516 struct cifs_sb_info *cifs_sb;
517
518 cifs_sb = CIFS_SB(inode->i_sb);
519 xid = GetXid();
520 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
521 cifs_get_inode_info_unix(&inode, "", inode->i_sb,xid);
522 else
523 cifs_get_inode_info(&inode, "", NULL, inode->i_sb,xid);
524 /* can not call macro FreeXid here since in a void func */
525 _FreeXid(xid);
526}
527
528int cifs_unlink(struct inode *inode, struct dentry *direntry)
529{
530 int rc = 0;
531 int xid;
532 struct cifs_sb_info *cifs_sb;
533 struct cifsTconInfo *pTcon;
534 char *full_path = NULL;
535 struct cifsInodeInfo *cifsInode;
536 FILE_BASIC_INFO *pinfo_buf;
537
538 cFYI(1, (" cifs_unlink, inode = 0x%p with ", inode));
539
540 xid = GetXid();
541
542 cifs_sb = CIFS_SB(inode->i_sb);
543 pTcon = cifs_sb->tcon;
544
545 /* Unlink can be called from rename so we can not grab the sem here
546 since we deadlock otherwise */
547/* down(&direntry->d_sb->s_vfs_rename_sem);*/
7f57356b 548 full_path = build_path_from_dentry(direntry);
1da177e4
LT		 549/* up(&direntry->d_sb->s_vfs_rename_sem);*/
550 if (full_path == NULL) {
551 FreeXid(xid);
552 return -ENOMEM;
553 }
737b758c
SF		 554 rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
555 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 556
557 if (!rc) {
d0d2f2df 558 if (direntry->d_inode)
b2aeb9d5 559 direntry->d_inode->i_nlink--;
1da177e4
LT		 560 } else if (rc == -ENOENT) {
561 d_drop(direntry);
562 } else if (rc == -ETXTBSY) {
563 int oplock = FALSE;
564 __u16 netfid;
565
566 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
567 CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
737b758c
SF		 568 &netfid, &oplock, NULL, cifs_sb->local_nls,
569 cifs_sb->mnt_cifs_flags &
570 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 571 if (rc==0) {
572 CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
737b758c
SF		 573 cifs_sb->local_nls,
574 cifs_sb->mnt_cifs_flags &
575 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 576 CIFSSMBClose(xid, pTcon, netfid);
d0d2f2df 577 if (direntry->d_inode)
b2aeb9d5 578 direntry->d_inode->i_nlink--;
1da177e4
LT		 579 }
580 } else if (rc == -EACCES) {
581 /* try only if r/o attribute set in local lookup data? */
582 pinfo_buf = kmalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
583 if (pinfo_buf) {
584 memset(pinfo_buf, 0, sizeof(FILE_BASIC_INFO));
585 /* ATTRS set to normal clears r/o bit */
586 pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
587 if (!(pTcon->ses->flags & CIFS_SES_NT4))
588 rc = CIFSSMBSetTimes(xid, pTcon, full_path,
589 pinfo_buf,
737b758c
SF		 590 cifs_sb->local_nls,
591 cifs_sb->mnt_cifs_flags &
592 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 593 else
594 rc = -EOPNOTSUPP;
595
596 if (rc == -EOPNOTSUPP) {
597 int oplock = FALSE;
598 __u16 netfid;
599 /* rc = CIFSSMBSetAttrLegacy(xid, pTcon,
600 full_path,
601 (__u16)ATTR_NORMAL,
602 cifs_sb->local_nls);
603 For some strange reason it seems that NT4 eats the
604 old setattr call without actually setting the
605 attributes so on to the third attempted workaround
606 */
607
608 /* BB could scan to see if we already have it open
609 and pass in pid of opener to function */
610 rc = CIFSSMBOpen(xid, pTcon, full_path,
611 FILE_OPEN, SYNCHRONIZE |
612 FILE_WRITE_ATTRIBUTES, 0,
613 &netfid, &oplock, NULL,
737b758c
SF		 614 cifs_sb->local_nls,
615 cifs_sb->mnt_cifs_flags &
616 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 617 if (rc==0) {
618 rc = CIFSSMBSetFileTimes(xid, pTcon,
619 pinfo_buf,
620 netfid);
621 CIFSSMBClose(xid, pTcon, netfid);
622 }
623 }
624 kfree(pinfo_buf);
625 }
626 if (rc==0) {
737b758c
SF		 627 rc = CIFSSMBDelFile(xid, pTcon, full_path,
628 cifs_sb->local_nls,
629 cifs_sb->mnt_cifs_flags &
630 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 631 if (!rc) {
d0d2f2df 632 if (direntry->d_inode)
b2aeb9d5 633 direntry->d_inode->i_nlink--;
1da177e4
LT		 634 } else if (rc == -ETXTBSY) {
635 int oplock = FALSE;
636 __u16 netfid;
637
638 rc = CIFSSMBOpen(xid, pTcon, full_path,
639 FILE_OPEN, DELETE,
640 CREATE_NOT_DIR |
641 CREATE_DELETE_ON_CLOSE,
642 &netfid, &oplock, NULL,
737b758c
SF		 643 cifs_sb->local_nls,
644 cifs_sb->mnt_cifs_flags &
645 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 646 if (rc==0) {
647 CIFSSMBRenameOpenFile(xid, pTcon,
648 netfid, NULL,
737b758c
SF		 649 cifs_sb->local_nls,
650 cifs_sb->mnt_cifs_flags &
651 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 652 CIFSSMBClose(xid, pTcon, netfid);
d0d2f2df 653 if (direntry->d_inode)
b2aeb9d5 654 direntry->d_inode->i_nlink--;
1da177e4
LT		 655 }
656 /* BB if rc = -ETXTBUSY goto the rename logic BB */
657 }
658 }
659 }
d0d2f2df 660 if (direntry->d_inode) {
b2aeb9d5
SF		 661 cifsInode = CIFS_I(direntry->d_inode);
662 cifsInode->time = 0; /* will force revalidate to get info
663 when needed */
664 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
665 }
666 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
1da177e4
LT		 667 cifsInode = CIFS_I(inode);
668 cifsInode->time = 0; /* force revalidate of dir as well */
669
670 kfree(full_path);
671 FreeXid(xid);
672 return rc;
673}
674
675int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
676{
677 int rc = 0;
678 int xid;
679 struct cifs_sb_info *cifs_sb;
680 struct cifsTconInfo *pTcon;
681 char *full_path = NULL;
682 struct inode *newinode = NULL;
683
684 cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p ", mode, inode));
685
686 xid = GetXid();
687
688 cifs_sb = CIFS_SB(inode->i_sb);
689 pTcon = cifs_sb->tcon;
690
691 down(&inode->i_sb->s_vfs_rename_sem);
7f57356b 692 full_path = build_path_from_dentry(direntry);
1da177e4
LT		 693 up(&inode->i_sb->s_vfs_rename_sem);
694 if (full_path == NULL) {
695 FreeXid(xid);
696 return -ENOMEM;
697 }
698 /* BB add setting the equivalent of mode via CreateX w/ACLs */
737b758c
SF		 699 rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
700 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 701 if (rc) {
702 cFYI(1, ("cifs_mkdir returned 0x%x ", rc));
703 d_drop(direntry);
704 } else {
705 inode->i_nlink++;
706 if (pTcon->ses->capabilities & CAP_UNIX)
707 rc = cifs_get_inode_info_unix(&newinode, full_path,
708 inode->i_sb,xid);
709 else
710 rc = cifs_get_inode_info(&newinode, full_path, NULL,
711 inode->i_sb,xid);
712
b92327fe
SF		 713 if (pTcon->nocase)
714 direntry->d_op = &cifs_ci_dentry_ops;
715 else
716 direntry->d_op = &cifs_dentry_ops;
1da177e4
LT		 717 d_instantiate(direntry, newinode);
718 if (direntry->d_inode)
719 direntry->d_inode->i_nlink = 2;
720 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
d0d2f2df 721 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1da177e4
LT		 722 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
723 mode,
724 (__u64)current->euid,
725 (__u64)current->egid,
726 0 /* dev_t */,
737b758c
SF		 727 cifs_sb->local_nls,
728 cifs_sb->mnt_cifs_flags &
729 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 730 } else {
731 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
732 mode, (__u64)-1,
733 (__u64)-1, 0 /* dev_t */,
737b758c
SF		 734 cifs_sb->local_nls,
735 cifs_sb->mnt_cifs_flags &
736 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 737 }
738 else {
739 /* BB to be implemented via Windows secrty descriptors
740 eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
741 -1, -1, local_nls); */
742 }
743 }
744 kfree(full_path);
745 FreeXid(xid);
746 return rc;
747}
748
749int cifs_rmdir(struct inode *inode, struct dentry *direntry)
750{
751 int rc = 0;
752 int xid;
753 struct cifs_sb_info *cifs_sb;
754 struct cifsTconInfo *pTcon;
755 char *full_path = NULL;
756 struct cifsInodeInfo *cifsInode;
757
758 cFYI(1, (" cifs_rmdir, inode = 0x%p with ", inode));
759
760 xid = GetXid();
761
762 cifs_sb = CIFS_SB(inode->i_sb);
763 pTcon = cifs_sb->tcon;
764
765 down(&inode->i_sb->s_vfs_rename_sem);
7f57356b 766 full_path = build_path_from_dentry(direntry);
1da177e4
LT		 767 up(&inode->i_sb->s_vfs_rename_sem);
768 if (full_path == NULL) {
769 FreeXid(xid);
770 return -ENOMEM;
771 }
772
737b758c
SF		 773 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
774 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 775
776 if (!rc) {
777 inode->i_nlink--;
778 i_size_write(direntry->d_inode,0);
779 direntry->d_inode->i_nlink = 0;
780 }
781
782 cifsInode = CIFS_I(direntry->d_inode);
783 cifsInode->time = 0; /* force revalidate to go get info when
784 needed */
785 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
786 current_fs_time(inode->i_sb);
787
788 kfree(full_path);
789 FreeXid(xid);
790 return rc;
791}
792
793int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
794 struct inode *target_inode, struct dentry *target_direntry)
795{
796 char *fromName;
797 char *toName;
798 struct cifs_sb_info *cifs_sb_source;
799 struct cifs_sb_info *cifs_sb_target;
800 struct cifsTconInfo *pTcon;
801 int xid;
802 int rc = 0;
803
804 xid = GetXid();
805
806 cifs_sb_target = CIFS_SB(target_inode->i_sb);
807 cifs_sb_source = CIFS_SB(source_inode->i_sb);
808 pTcon = cifs_sb_source->tcon;
809
810 if (pTcon != cifs_sb_target->tcon) {
811 FreeXid(xid);
812 return -EXDEV; /* BB actually could be allowed if same server,
813 but different share.
814 Might eventually add support for this */
815 }
816
817 /* we already have the rename sem so we do not need to grab it again
818 here to protect the path integrity */
7f57356b
SF		 819 fromName = build_path_from_dentry(source_direntry);
820 toName = build_path_from_dentry(target_direntry);
1da177e4
LT		 821 if ((fromName == NULL) || (toName == NULL)) {
822 rc = -ENOMEM;
823 goto cifs_rename_exit;
824 }
825
826 rc = CIFSSMBRename(xid, pTcon, fromName, toName,
737b758c
SF		 827 cifs_sb_source->local_nls,
828 cifs_sb_source->mnt_cifs_flags &
829 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 830 if (rc == -EEXIST) {
831 /* check if they are the same file because rename of hardlinked
832 files is a noop */
833 FILE_UNIX_BASIC_INFO *info_buf_source;
834 FILE_UNIX_BASIC_INFO *info_buf_target;
835
836 info_buf_source =
837 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
838 if (info_buf_source != NULL) {
839 info_buf_target = info_buf_source + 1;
840 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
737b758c
SF		 841 info_buf_source, cifs_sb_source->local_nls,
842 cifs_sb_source->mnt_cifs_flags &
843 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 844 if (rc == 0) {
845 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
846 info_buf_target,
737b758c
SF		 847 cifs_sb_target->local_nls,
848 /* remap based on source sb */
849 cifs_sb_source->mnt_cifs_flags &
850 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 851 }
852 if ((rc == 0) &&
853 (info_buf_source->UniqueId ==
854 info_buf_target->UniqueId)) {
855 /* do not rename since the files are hardlinked which
856 is a noop */
857 } else {
858 /* we either can not tell the files are hardlinked
859 (as with Windows servers) or files are not
860 hardlinked so delete the target manually before
861 renaming to follow POSIX rather than Windows
862 semantics */
863 cifs_unlink(target_inode, target_direntry);
864 rc = CIFSSMBRename(xid, pTcon, fromName,
865 toName,
737b758c
SF		 866 cifs_sb_source->local_nls,
867 cifs_sb_source->mnt_cifs_flags
868 & CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 869 }
870 kfree(info_buf_source);
871 } /* if we can not get memory just leave rc as EEXIST */
872 }
873
874 if (rc) {
875 cFYI(1, ("rename rc %d", rc));
876 }
877
878 if ((rc == -EIO) || (rc == -EEXIST)) {
879 int oplock = FALSE;
880 __u16 netfid;
881
882 /* BB FIXME Is Generic Read correct for rename? */
883 /* if renaming directory - we should not say CREATE_NOT_DIR,
884 need to test renaming open directory, also GENERIC_READ
885 might not right be right access to request */
886 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
887 CREATE_NOT_DIR, &netfid, &oplock, NULL,
737b758c
SF		 888 cifs_sb_source->local_nls,
889 cifs_sb_source->mnt_cifs_flags &
890 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 891 if (rc==0) {
892 CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
737b758c
SF		 893 cifs_sb_source->local_nls,
894 cifs_sb_source->mnt_cifs_flags &
895 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 896 CIFSSMBClose(xid, pTcon, netfid);
897 }
898 }
899
900cifs_rename_exit:
901 kfree(fromName);
902 kfree(toName);
903 FreeXid(xid);
904 return rc;
905}
906
907int cifs_revalidate(struct dentry *direntry)
908{
909 int xid;
910 int rc = 0;
911 char *full_path;
912 struct cifs_sb_info *cifs_sb;
913 struct cifsInodeInfo *cifsInode;
914 loff_t local_size;
915 struct timespec local_mtime;
916 int invalidate_inode = FALSE;
917
918 if (direntry->d_inode == NULL)
919 return -ENOENT;
920
921 cifsInode = CIFS_I(direntry->d_inode);
922
923 if (cifsInode == NULL)
924 return -ENOENT;
925
926 /* no sense revalidating inode info on file that no one can write */
927 if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
928 return rc;
929
930 xid = GetXid();
931
932 cifs_sb = CIFS_SB(direntry->d_sb);
933
934 /* can not safely grab the rename sem here if rename calls revalidate
935 since that would deadlock */
7f57356b 936 full_path = build_path_from_dentry(direntry);
1da177e4
LT		 937 if (full_path == NULL) {
938 FreeXid(xid);
939 return -ENOMEM;
940 }
941 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
942 "jiffies %ld", full_path, direntry->d_inode,
943 direntry->d_inode->i_count.counter, direntry,
944 direntry->d_time, jiffies));
945
946 if (cifsInode->time == 0) {
947 /* was set to zero previously to force revalidate */
948 } else if (time_before(jiffies, cifsInode->time + HZ) &&
949 lookupCacheEnabled) {
950 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
951 (direntry->d_inode->i_nlink == 1)) {
952 kfree(full_path);
953 FreeXid(xid);
954 return rc;
955 } else {
956 cFYI(1, ("Have to revalidate file due to hardlinks"));
957 }
958 }
959
960 /* save mtime and size */
961 local_mtime = direntry->d_inode->i_mtime;
962 local_size = direntry->d_inode->i_size;
963
964 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX) {
965 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
966 direntry->d_sb,xid);
967 if (rc) {
968 cFYI(1, ("error on getting revalidate info %d", rc));
969/* if (rc != -ENOENT)
970 rc = 0; */ /* BB should we cache info on
971 certain errors? */
972 }
973 } else {
974 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
975 direntry->d_sb,xid);
976 if (rc) {
977 cFYI(1, ("error on getting revalidate info %d", rc));
978/* if (rc != -ENOENT)
979 rc = 0; */ /* BB should we cache info on
980 certain errors? */
981 }
982 }
983 /* should we remap certain errors, access denied?, to zero */
984
985 /* if not oplocked, we invalidate inode pages if mtime or file size
986 had changed on server */
987
988 if (timespec_equal(&local_mtime,&direntry->d_inode->i_mtime) &&
989 (local_size == direntry->d_inode->i_size)) {
990 cFYI(1, ("cifs_revalidate - inode unchanged"));
991 } else {
992 /* file may have changed on server */
993 if (cifsInode->clientCanCacheRead) {
994 /* no need to invalidate inode pages since we were the
995 only ones who could have modified the file and the
996 server copy is staler than ours */
997 } else {
998 invalidate_inode = TRUE;
999 }
1000 }
1001
1002 /* can not grab this sem since kernel filesys locking documentation
1003 indicates i_sem may be taken by the kernel on lookup and rename
1004 which could deadlock if we grab the i_sem here as well */
1005/* down(&direntry->d_inode->i_sem);*/
1006 /* need to write out dirty pages here */
1007 if (direntry->d_inode->i_mapping) {
1008 /* do we need to lock inode until after invalidate completes
1009 below? */
1010 filemap_fdatawrite(direntry->d_inode->i_mapping);
1011 }
1012 if (invalidate_inode) {
1013 if (direntry->d_inode->i_mapping)
1014 filemap_fdatawait(direntry->d_inode->i_mapping);
1015 /* may eventually have to do this for open files too */
1016 if (list_empty(&(cifsInode->openFileList))) {
1017 /* Has changed on server - flush read ahead pages */
1018 cFYI(1, ("Invalidating read ahead data on "
1019 "closed file"));
1020 invalidate_remote_inode(direntry->d_inode);
1021 }
1022 }
1023/* up(&direntry->d_inode->i_sem); */
1024
1025 kfree(full_path);
1026 FreeXid(xid);
1027 return rc;
1028}
1029
1030int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1031 struct kstat *stat)
1032{
1033 int err = cifs_revalidate(dentry);
1034 if (!err)
1035 generic_fillattr(dentry->d_inode, stat);
1036 return err;
1037}
1038
1039static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1040{
1041 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1042 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1043 struct page *page;
1044 char *kaddr;
1045 int rc = 0;
1046
1047 page = grab_cache_page(mapping, index);
1048 if (!page)
1049 return -ENOMEM;
1050
1051 kaddr = kmap_atomic(page, KM_USER0);
1052 memset(kaddr + offset, 0, PAGE_CACHE_SIZE - offset);
1053 flush_dcache_page(page);
1054 kunmap_atomic(kaddr, KM_USER0);
1055 unlock_page(page);
1056 page_cache_release(page);
1057 return rc;
1058}
1059
1060int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1061{
1062 int xid;
1063 struct cifs_sb_info *cifs_sb;
1064 struct cifsTconInfo *pTcon;
1065 char *full_path = NULL;
1066 int rc = -EACCES;
1da177e4
LT		 1067 struct cifsFileInfo *open_file = NULL;
1068 FILE_BASIC_INFO time_buf;
1069 int set_time = FALSE;
1070 __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1071 __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1072 __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1073 struct cifsInodeInfo *cifsInode;
1da177e4
LT		 1074
1075 xid = GetXid();
1076
1077 cFYI(1, (" In cifs_setattr, name = %s attrs->iavalid 0x%x ",
1078 direntry->d_name.name, attrs->ia_valid));
1079 cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
1080 pTcon = cifs_sb->tcon;
1081
1082 down(&direntry->d_sb->s_vfs_rename_sem);
7f57356b 1083 full_path = build_path_from_dentry(direntry);
1da177e4
LT		 1084 up(&direntry->d_sb->s_vfs_rename_sem);
1085 if (full_path == NULL) {
1086 FreeXid(xid);
1087 return -ENOMEM;
1088 }
1089 cifsInode = CIFS_I(direntry->d_inode);
1090
1091 /* BB check if we need to refresh inode from server now ? BB */
1092
1093 /* need to flush data before changing file size on server */
1094 filemap_fdatawrite(direntry->d_inode->i_mapping);
1095 filemap_fdatawait(direntry->d_inode->i_mapping);
1096
1097 if (attrs->ia_valid & ATTR_SIZE) {
1da177e4
LT		 1098 /* To avoid spurious oplock breaks from server, in the case of
1099 inodes that we already have open, avoid doing path based
1100 setting of file size if we can do it by handle.
1101 This keeps our caching token (oplock) and avoids timeouts
1102 when the local oplock break takes longer to flush
1103 writebehind data than the SMB timeout for the SetPathInfo
1104 request would allow */
6148a742
SF		 1105 open_file = find_writable_file(cifsInode);
1106 if (open_file) {
1107 __u16 nfid = open_file->netfid;
1108 __u32 npid = open_file->pid;
1109 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1110 nfid, npid, FALSE);
23e7dd7d 1111 atomic_dec(&open_file->wrtPending);
6148a742
SF		 1112 cFYI(1,("SetFSize for attrs rc = %d", rc));
1113 if(rc == -EINVAL) {
1114 int bytes_written;
1115 rc = CIFSSMBWrite(xid, pTcon,
1116 nfid, 0, attrs->ia_size,
1117 &bytes_written, NULL, NULL,
1118 1 /* 45 seconds */);
1119 cFYI(1,("Wrt seteof rc %d", rc));
1da177e4
LT		 1120 }
1121 }
1da177e4
LT		 1122 if (rc != 0) {
1123 /* Set file size by pathname rather than by handle
1124 either because no valid, writeable file handle for
1125 it was found or because there was an error setting
1126 it by handle */
1127 rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1128 attrs->ia_size, FALSE,
737b758c
SF		 1129 cifs_sb->local_nls,
1130 cifs_sb->mnt_cifs_flags &
1131 CIFS_MOUNT_MAP_SPECIAL_CHR);
e30dcf3a
SF		 1132 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1133 if(rc == -EINVAL) {
1134 __u16 netfid;
1135 int oplock = FALSE;
1136
1137 rc = SMBLegacyOpen(xid, pTcon, full_path,
1138 FILE_OPEN,
1139 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1140 CREATE_NOT_DIR, &netfid, &oplock,
1141 NULL, cifs_sb->local_nls,
1142 cifs_sb->mnt_cifs_flags &
1143 CIFS_MOUNT_MAP_SPECIAL_CHR);
1144 if (rc==0) {
1145 int bytes_written;
1146 rc = CIFSSMBWrite(xid, pTcon,
1147 netfid, 0,
1148 attrs->ia_size,
1149 &bytes_written, NULL,
1150 NULL, 1 /* 45 sec */);
1151 cFYI(1,("wrt seteof rc %d",rc));
1152 CIFSSMBClose(xid, pTcon, netfid);
1153 }
1154
1155 }
1da177e4
LT		 1156 }
1157
1158 /* Server is ok setting allocation size implicitly - no need
1159 to call:
1160 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1161 cifs_sb->local_nls);
1162 */
1163
1164 if (rc == 0) {
1165 rc = vmtruncate(direntry->d_inode, attrs->ia_size);
1166 cifs_truncate_page(direntry->d_inode->i_mapping,
1167 direntry->d_inode->i_size);
e30dcf3a
SF		 1168 } else
1169 goto cifs_setattr_exit;
1da177e4
LT		 1170 }
1171 if (attrs->ia_valid & ATTR_UID) {
e30dcf3a 1172 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1da177e4 1173 uid = attrs->ia_uid;
1da177e4
LT		 1174 }
1175 if (attrs->ia_valid & ATTR_GID) {
e30dcf3a 1176 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1da177e4 1177 gid = attrs->ia_gid;
1da177e4
LT		 1178 }
1179
1180 time_buf.Attributes = 0;
1181 if (attrs->ia_valid & ATTR_MODE) {
e30dcf3a 1182 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1da177e4 1183 mode = attrs->ia_mode;
1da177e4
LT		 1184 }
1185
1186 if ((cifs_sb->tcon->ses->capabilities & CAP_UNIX)
1187 && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1188 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
737b758c
SF		 1189 0 /* dev_t */, cifs_sb->local_nls,
1190 cifs_sb->mnt_cifs_flags &
1191 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 1192 else if (attrs->ia_valid & ATTR_MODE) {
1193 if ((mode & S_IWUGO) == 0) /* not writeable */ {
1194 if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0)
1195 time_buf.Attributes =
1196 cpu_to_le32(cifsInode->cifsAttrs |
1197 ATTR_READONLY);
1198 } else if ((mode & S_IWUGO) == S_IWUGO) {
1199 if (cifsInode->cifsAttrs & ATTR_READONLY)
1200 time_buf.Attributes =
1201 cpu_to_le32(cifsInode->cifsAttrs &
1202 (~ATTR_READONLY));
1203 }
1204 /* BB to be implemented -
1205 via Windows security descriptors or streams */
1206 /* CIFSSMBWinSetPerms(xid, pTcon, full_path, mode, uid, gid,
1207 cifs_sb->local_nls); */
1208 }
1209
1210 if (attrs->ia_valid & ATTR_ATIME) {
1211 set_time = TRUE;
1212 time_buf.LastAccessTime =
1213 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1214 } else
1215 time_buf.LastAccessTime = 0;
1216
1217 if (attrs->ia_valid & ATTR_MTIME) {
1218 set_time = TRUE;
1219 time_buf.LastWriteTime =
1220 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1221 } else
1222 time_buf.LastWriteTime = 0;
e30dcf3a
SF		 1223 /* Do not set ctime explicitly unless other time
1224 stamps are changed explicitly (i.e. by utime()
1225 since we would then have a mix of client and
1226 server times */
1227
1228 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1da177e4 1229 set_time = TRUE;
e30dcf3a
SF		 1230 /* Although Samba throws this field away
1231 it may be useful to Windows - but we do
1232 not want to set ctime unless some other
1233 timestamp is changing */
1234 cFYI(1, ("CIFS - CTIME changed "));
1da177e4
LT		 1235 time_buf.ChangeTime =
1236 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1237 } else
1238 time_buf.ChangeTime = 0;
1239
1240 if (set_time || time_buf.Attributes) {
1da177e4
LT		 1241 time_buf.CreationTime = 0; /* do not change */
1242 /* In the future we should experiment - try setting timestamps
1243 via Handle (SetFileInfo) instead of by path */
1244 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1245 rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
737b758c
SF		 1246 cifs_sb->local_nls,
1247 cifs_sb->mnt_cifs_flags &
1248 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 1249 else
1250 rc = -EOPNOTSUPP;
1251
1252 if (rc == -EOPNOTSUPP) {
1253 int oplock = FALSE;
1254 __u16 netfid;
1255
1256 cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1257 "times not supported by this server"));
1258 /* BB we could scan to see if we already have it open
1259 and pass in pid of opener to function */
1260 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1261 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1262 CREATE_NOT_DIR, &netfid, &oplock,
737b758c
SF		 1263 NULL, cifs_sb->local_nls,
1264 cifs_sb->mnt_cifs_flags &
1265 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 1266 if (rc==0) {
1267 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1268 netfid);
1269 CIFSSMBClose(xid, pTcon, netfid);
1270 } else {
1271 /* BB For even older servers we could convert time_buf
1272 into old DOS style which uses two second
1273 granularity */
1274
1275 /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1276 &time_buf, cifs_sb->local_nls); */
1277 }
1278 }
e30dcf3a
SF		 1279 /* Even if error on time set, no sense failing the call if
1280 the server would set the time to a reasonable value anyway,
1281 and this check ensures that we are not being called from
1282 sys_utimes in which case we ought to fail the call back to
1283 the user when the server rejects the call */
1284 if((rc) && (attrs->ia_valid &&
1285 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1286 rc = 0;
1da177e4
LT		 1287 }
1288
1289 /* do not need local check to inode_check_ok since the server does
1290 that */
1291 if (!rc)
1292 rc = inode_setattr(direntry->d_inode, attrs);
e30dcf3a 1293cifs_setattr_exit:
1da177e4
LT		 1294 kfree(full_path);
1295 FreeXid(xid);
1296 return rc;
1297}
1298
1299void cifs_delete_inode(struct inode *inode)
1300{
1301 cFYI(1, ("In cifs_delete_inode, inode = 0x%p ", inode));
1302 /* may have to add back in if and when safe distributed caching of
1303 directories added e.g. via FindNotify */
1304}
Linux 6.x block layer and io_uring tree(s)