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[CIFS] Support for setting up SMB sessions to legacy lanman servers
[mirror_ubuntu-jammy-kernel.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;
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
1da177e4 183 inode->i_data.a_ops = &cifs_addr_ops;
bfa0d75a
SF		 184 /* check if server can support readpages */
185 if(pTcon->ses->server->maxBuf <
186 4096 + MAX_CIFS_HDR_SIZE)
187 inode->i_data.a_ops->readpages = NULL;
1da177e4 188 } else if (S_ISDIR(inode->i_mode)) {
8b94bcb9 189 cFYI(1, ("Directory inode"));
1da177e4
LT		 190 inode->i_op = &cifs_dir_inode_ops;
191 inode->i_fop = &cifs_dir_ops;
192 } else if (S_ISLNK(inode->i_mode)) {
8b94bcb9 193 cFYI(1, ("Symbolic Link inode"));
1da177e4
LT		 194 inode->i_op = &cifs_symlink_inode_ops;
195 /* tmp_inode->i_fop = */ /* do not need to set to anything */
196 } else {
8b94bcb9 197 cFYI(1, ("Init special inode"));
1da177e4
LT		 198 init_special_inode(inode, inode->i_mode,
199 inode->i_rdev);
200 }
201 }
202 return rc;
203}
204
d6e2f2a4
SF		 205static int decode_sfu_inode(struct inode * inode, __u64 size,
206 const unsigned char *path,
207 struct cifs_sb_info *cifs_sb, int xid)
208{
209 int rc;
210 int oplock = FALSE;
211 __u16 netfid;
212 struct cifsTconInfo *pTcon = cifs_sb->tcon;
86c96b4b 213 char buf[24];
d6e2f2a4
SF		 214 unsigned int bytes_read;
215 char * pbuf;
216
217 pbuf = buf;
218
219 if(size == 0) {
220 inode->i_mode |= S_IFIFO;
221 return 0;
222 } else if (size < 8) {
223 return -EINVAL; /* EOPNOTSUPP? */
224 }
225
226 rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ,
227 CREATE_NOT_DIR, &netfid, &oplock, NULL,
228 cifs_sb->local_nls,
229 cifs_sb->mnt_cifs_flags &
230 CIFS_MOUNT_MAP_SPECIAL_CHR);
231 if (rc==0) {
ec637e3f 232 int buf_type = CIFS_NO_BUFFER;
d6e2f2a4
SF		 233 /* Read header */
234 rc = CIFSSMBRead(xid, pTcon,
235 netfid,
86c96b4b 236 24 /* length */, 0 /* offset */,
ec637e3f 237 &bytes_read, &pbuf, &buf_type);
86c96b4b 238 if((rc == 0) && (bytes_read >= 8)) {
9e294f1c
SF		 239 if(memcmp("IntxBLK", pbuf, 8) == 0) {
240 cFYI(1,("Block device"));
3020a1f5 241 inode->i_mode |= S_IFBLK;
86c96b4b
SF		 242 if(bytes_read == 24) {
243 /* we have enough to decode dev num */
244 __u64 mjr; /* major */
245 __u64 mnr; /* minor */
246 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
247 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
248 inode->i_rdev = MKDEV(mjr, mnr);
249 }
9e294f1c
SF		 250 } else if(memcmp("IntxCHR", pbuf, 8) == 0) {
251 cFYI(1,("Char device"));
3020a1f5 252 inode->i_mode |= S_IFCHR;
86c96b4b
SF		 253 if(bytes_read == 24) {
254 /* we have enough to decode dev num */
255 __u64 mjr; /* major */
256 __u64 mnr; /* minor */
257 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
258 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
259 inode->i_rdev = MKDEV(mjr, mnr);
260 }
9e294f1c
SF		 261 } else if(memcmp("IntxLNK", pbuf, 7) == 0) {
262 cFYI(1,("Symlink"));
3020a1f5 263 inode->i_mode |= S_IFLNK;
86c96b4b
SF		 264 } else {
265 inode->i_mode |= S_IFREG; /* file? */
266 rc = -EOPNOTSUPP;
267 }
3020a1f5
SF		 268 } else {
269 inode->i_mode |= S_IFREG; /* then it is a file */
270 rc = -EOPNOTSUPP; /* or some unknown SFU type */
ec637e3f 271 }
d6e2f2a4 272 CIFSSMBClose(xid, pTcon, netfid);
d6e2f2a4
SF		 273 }
274 return rc;
275
276}
277
9e294f1c
SF		 278#define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
279
280static int get_sfu_uid_mode(struct inode * inode,
281 const unsigned char *path,
282 struct cifs_sb_info *cifs_sb, int xid)
283{
3020a1f5 284#ifdef CONFIG_CIFS_XATTR
9e294f1c
SF		 285 ssize_t rc;
286 char ea_value[4];
287 __u32 mode;
288
289 rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS",
290 ea_value, 4 /* size of buf */, cifs_sb->local_nls,
291 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
292 if(rc < 0)
293 return (int)rc;
294 else if (rc > 3) {
295 mode = le32_to_cpu(*((__le32 *)ea_value));
c119b87d 296 inode->i_mode &= ~SFBITS_MASK;
3020a1f5 297 cFYI(1,("special bits 0%o org mode 0%o", mode, inode->i_mode));
9e294f1c
SF		 298 inode->i_mode = (mode & SFBITS_MASK) | inode->i_mode;
299 cFYI(1,("special mode bits 0%o", mode));
300 return 0;
301 } else {
302 return 0;
303 }
3020a1f5
SF		 304#else
305 return -EOPNOTSUPP;
306#endif
307
9e294f1c
SF		 308
309}
310
1da177e4
LT		 311int cifs_get_inode_info(struct inode **pinode,
312 const unsigned char *search_path, FILE_ALL_INFO *pfindData,
313 struct super_block *sb, int xid)
314{
315 int rc = 0;
316 struct cifsTconInfo *pTcon;
317 struct inode *inode;
318 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
319 char *tmp_path;
320 char *buf = NULL;
321
322 pTcon = cifs_sb->tcon;
d6e2f2a4 323 cFYI(1,("Getting info on %s", search_path));
1da177e4 324
d0d2f2df
SF		 325 if ((pfindData == NULL) && (*pinode != NULL)) {
326 if (CIFS_I(*pinode)->clientCanCacheRead) {
1da177e4
LT		 327 cFYI(1,("No need to revalidate cached inode sizes"));
328 return rc;
329 }
330 }
331
332 /* if file info not passed in then get it from server */
d0d2f2df 333 if (pfindData == NULL) {
1da177e4 334 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
d0d2f2df 335 if (buf == NULL)
1da177e4
LT		 336 return -ENOMEM;
337 pfindData = (FILE_ALL_INFO *)buf;
338 /* could do find first instead but this returns more info */
339 rc = CIFSSMBQPathInfo(xid, pTcon, search_path, pfindData,
6b8edfe0 340 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
737b758c 341 CIFS_MOUNT_MAP_SPECIAL_CHR);
6b8edfe0
SF		 342 /* BB optimize code so we do not make the above call
343 when server claims no NT SMB support and the above call
344 failed at least once - set flag in tcon or mount */
345 if((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
346 rc = SMBQueryInformation(xid, pTcon, search_path,
347 pfindData, cifs_sb->local_nls,
348 cifs_sb->mnt_cifs_flags &
349 CIFS_MOUNT_MAP_SPECIAL_CHR);
350 }
351
1da177e4
LT		 352 }
353 /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
354 if (rc) {
355 if (rc == -EREMOTE) {
356 tmp_path =
357 kmalloc(strnlen
358 (pTcon->treeName,
359 MAX_TREE_SIZE + 1) +
360 strnlen(search_path, MAX_PATHCONF) + 1,
361 GFP_KERNEL);
362 if (tmp_path == NULL) {
363 kfree(buf);
364 return -ENOMEM;
365 }
366
367 strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
368 strncat(tmp_path, search_path, MAX_PATHCONF);
369 rc = connect_to_dfs_path(xid, pTcon->ses,
370 /* treename + */ tmp_path,
737b758c
SF		 371 cifs_sb->local_nls,
372 cifs_sb->mnt_cifs_flags &
373 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 374 kfree(tmp_path);
375 /* BB fix up inode etc. */
376 } else if (rc) {
377 kfree(buf);
378 return rc;
379 }
380 } else {
381 struct cifsInodeInfo *cifsInfo;
382 __u32 attr = le32_to_cpu(pfindData->Attributes);
383
384 /* get new inode */
385 if (*pinode == NULL) {
386 *pinode = new_inode(sb);
387 if (*pinode == NULL)
388 return -ENOMEM;
389 /* Is an i_ino of zero legal? Can we use that to check
390 if the server supports returning inode numbers? Are
391 there other sanity checks we can use to ensure that
392 the server is really filling in that field? */
393
394 /* We can not use the IndexNumber field by default from
395 Windows or Samba (in ALL_INFO buf) but we can request
396 it explicitly. It may not be unique presumably if
397 the server has multiple devices mounted under one
398 share */
399
400 /* There may be higher info levels that work but are
401 there Windows server or network appliances for which
402 IndexNumber field is not guaranteed unique? */
403
d0d2f2df 404 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM){
1da177e4
LT		 405 int rc1 = 0;
406 __u64 inode_num;
407
408 rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
409 search_path, &inode_num,
737b758c
SF		 410 cifs_sb->local_nls,
411 cifs_sb->mnt_cifs_flags &
412 CIFS_MOUNT_MAP_SPECIAL_CHR);
d0d2f2df 413 if (rc1) {
1da177e4
LT		 414 cFYI(1,("GetSrvInodeNum rc %d", rc1));
415 /* BB EOPNOSUPP disable SERVER_INUM? */
416 } else /* do we need cast or hash to ino? */
417 (*pinode)->i_ino = inode_num;
418 } /* else ino incremented to unique num in new_inode*/
1da177e4
LT		 419 insert_inode_hash(*pinode);
420 }
421 inode = *pinode;
422 cifsInfo = CIFS_I(inode);
423 cifsInfo->cifsAttrs = attr;
26a21b98 424 cFYI(1, ("Old time %ld", cifsInfo->time));
1da177e4 425 cifsInfo->time = jiffies;
26a21b98 426 cFYI(1, ("New time %ld", cifsInfo->time));
1da177e4
LT		 427
428 /* blksize needs to be multiple of two. So safer to default to
429 blksize and blkbits set in superblock so 2**blkbits and blksize
430 will match rather than setting to:
431 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
432
26a21b98 433 /* Linux can not store file creation time so ignore it */
1da177e4
LT		 434 inode->i_atime =
435 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
436 inode->i_mtime =
437 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
438 inode->i_ctime =
439 cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
26a21b98 440 cFYI(0, ("Attributes came in as 0x%x", attr));
1da177e4
LT		 441
442 /* set default mode. will override for dirs below */
443 if (atomic_read(&cifsInfo->inUse) == 0)
444 /* new inode, can safely set these fields */
445 inode->i_mode = cifs_sb->mnt_file_mode;
3020a1f5
SF		 446 else /* since we set the inode type below we need to mask off
447 to avoid strange results if type changes and both get orred in */
448 inode->i_mode &= ~S_IFMT;
1da177e4
LT		 449/* if (attr & ATTR_REPARSE) */
450 /* We no longer handle these as symlinks because we could not
451 follow them due to the absolute path with drive letter */
452 if (attr & ATTR_DIRECTORY) {
453 /* override default perms since we do not do byte range locking
454 on dirs */
455 inode->i_mode = cifs_sb->mnt_dir_mode;
456 inode->i_mode |= S_IFDIR;
eda3c029
SF		 457 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
458 (cifsInfo->cifsAttrs & ATTR_SYSTEM) &&
459 /* No need to le64 convert size of zero */
460 (pfindData->EndOfFile == 0)) {
461 inode->i_mode = cifs_sb->mnt_file_mode;
462 inode->i_mode |= S_IFIFO;
d6e2f2a4
SF		 463/* BB Finish for SFU style symlinks and devices */
464 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
465 (cifsInfo->cifsAttrs & ATTR_SYSTEM)) {
466 if (decode_sfu_inode(inode,
467 le64_to_cpu(pfindData->EndOfFile),
468 search_path,
469 cifs_sb, xid)) {
470 cFYI(1,("Unrecognized sfu inode type"));
471 }
3020a1f5 472 cFYI(1,("sfu mode 0%o",inode->i_mode));
1da177e4
LT		 473 } else {
474 inode->i_mode |= S_IFREG;
475 /* treat the dos attribute of read-only as read-only
476 mode e.g. 555 */
477 if (cifsInfo->cifsAttrs & ATTR_READONLY)
478 inode->i_mode &= ~(S_IWUGO);
479 /* BB add code here -
480 validate if device or weird share or device type? */
481 }
482 if (is_size_safe_to_change(cifsInfo)) {
483 /* can not safely change the file size here if the
484 client is writing to it due to potential races */
485 i_size_write(inode,le64_to_cpu(pfindData->EndOfFile));
486
487 /* 512 bytes (2**9) is the fake blocksize that must be
488 used for this calculation */
489 inode->i_blocks = (512 - 1 + le64_to_cpu(
490 pfindData->AllocationSize)) >> 9;
491 }
492
493 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
494
495 /* BB fill in uid and gid here? with help from winbind?
496 or retrieve from NTFS stream extended attribute */
9e294f1c
SF		 497 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
498 /* fill in uid, gid, mode from server ACL */
499 get_sfu_uid_mode(inode, search_path, cifs_sb, xid);
500 } else if (atomic_read(&cifsInfo->inUse) == 0) {
1da177e4
LT		 501 inode->i_uid = cifs_sb->mnt_uid;
502 inode->i_gid = cifs_sb->mnt_gid;
503 /* set so we do not keep refreshing these fields with
504 bad data after user has changed them in memory */
505 atomic_set(&cifsInfo->inUse,1);
506 }
507
508 if (S_ISREG(inode->i_mode)) {
d6e2f2a4 509 cFYI(1, ("File inode"));
1da177e4 510 inode->i_op = &cifs_file_inode_ops;
8b94bcb9
SF		 511 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
512 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
513 inode->i_fop =
514 &cifs_file_direct_nobrl_ops;
515 else
516 inode->i_fop = &cifs_file_direct_ops;
517 } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
518 inode->i_fop = &cifs_file_nobrl_ops;
519 else /* not direct, send byte range locks */
1da177e4 520 inode->i_fop = &cifs_file_ops;
8b94bcb9 521
1da177e4 522 inode->i_data.a_ops = &cifs_addr_ops;
bfa0d75a
SF		 523 if(pTcon->ses->server->maxBuf <
524 4096 + MAX_CIFS_HDR_SIZE)
525 inode->i_data.a_ops->readpages = NULL;
1da177e4 526 } else if (S_ISDIR(inode->i_mode)) {
d6e2f2a4 527 cFYI(1, ("Directory inode"));
1da177e4
LT		 528 inode->i_op = &cifs_dir_inode_ops;
529 inode->i_fop = &cifs_dir_ops;
530 } else if (S_ISLNK(inode->i_mode)) {
d6e2f2a4 531 cFYI(1, ("Symbolic Link inode"));
1da177e4
LT		 532 inode->i_op = &cifs_symlink_inode_ops;
533 } else {
534 init_special_inode(inode, inode->i_mode,
535 inode->i_rdev);
536 }
537 }
538 kfree(buf);
539 return rc;
540}
541
542/* gets root inode */
543void cifs_read_inode(struct inode *inode)
544{
545 int xid;
546 struct cifs_sb_info *cifs_sb;
547
548 cifs_sb = CIFS_SB(inode->i_sb);
549 xid = GetXid();
550 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
551 cifs_get_inode_info_unix(&inode, "", inode->i_sb,xid);
552 else
553 cifs_get_inode_info(&inode, "", NULL, inode->i_sb,xid);
554 /* can not call macro FreeXid here since in a void func */
555 _FreeXid(xid);
556}
557
558int cifs_unlink(struct inode *inode, struct dentry *direntry)
559{
560 int rc = 0;
561 int xid;
562 struct cifs_sb_info *cifs_sb;
563 struct cifsTconInfo *pTcon;
564 char *full_path = NULL;
565 struct cifsInodeInfo *cifsInode;
566 FILE_BASIC_INFO *pinfo_buf;
567
06bcfedd 568 cFYI(1, ("cifs_unlink, inode = 0x%p", inode));
1da177e4
LT		 569
570 xid = GetXid();
571
6910ab30
SF		 572 if(inode)
573 cifs_sb = CIFS_SB(inode->i_sb);
574 else
06bcfedd 575 cifs_sb = CIFS_SB(direntry->d_sb);
1da177e4
LT		 576 pTcon = cifs_sb->tcon;
577
578 /* Unlink can be called from rename so we can not grab the sem here
579 since we deadlock otherwise */
a11f3a05 580/* mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/
7f57356b 581 full_path = build_path_from_dentry(direntry);
a11f3a05 582/* mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/
1da177e4
LT		 583 if (full_path == NULL) {
584 FreeXid(xid);
585 return -ENOMEM;
586 }
737b758c
SF		 587 rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
588 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 589
590 if (!rc) {
d0d2f2df 591 if (direntry->d_inode)
b2aeb9d5 592 direntry->d_inode->i_nlink--;
1da177e4
LT		 593 } else if (rc == -ENOENT) {
594 d_drop(direntry);
595 } else if (rc == -ETXTBSY) {
596 int oplock = FALSE;
597 __u16 netfid;
598
599 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
600 CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
737b758c
SF		 601 &netfid, &oplock, NULL, cifs_sb->local_nls,
602 cifs_sb->mnt_cifs_flags &
603 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 604 if (rc==0) {
605 CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
737b758c
SF		 606 cifs_sb->local_nls,
607 cifs_sb->mnt_cifs_flags &
608 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 609 CIFSSMBClose(xid, pTcon, netfid);
d0d2f2df 610 if (direntry->d_inode)
b2aeb9d5 611 direntry->d_inode->i_nlink--;
1da177e4
LT		 612 }
613 } else if (rc == -EACCES) {
614 /* try only if r/o attribute set in local lookup data? */
a048d7a8 615 pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
1da177e4 616 if (pinfo_buf) {
1da177e4
LT		 617 /* ATTRS set to normal clears r/o bit */
618 pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
619 if (!(pTcon->ses->flags & CIFS_SES_NT4))
620 rc = CIFSSMBSetTimes(xid, pTcon, full_path,
621 pinfo_buf,
737b758c
SF		 622 cifs_sb->local_nls,
623 cifs_sb->mnt_cifs_flags &
624 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 625 else
626 rc = -EOPNOTSUPP;
627
628 if (rc == -EOPNOTSUPP) {
629 int oplock = FALSE;
630 __u16 netfid;
631 /* rc = CIFSSMBSetAttrLegacy(xid, pTcon,
632 full_path,
633 (__u16)ATTR_NORMAL,
634 cifs_sb->local_nls);
635 For some strange reason it seems that NT4 eats the
636 old setattr call without actually setting the
637 attributes so on to the third attempted workaround
638 */
639
640 /* BB could scan to see if we already have it open
641 and pass in pid of opener to function */
642 rc = CIFSSMBOpen(xid, pTcon, full_path,
643 FILE_OPEN, SYNCHRONIZE |
644 FILE_WRITE_ATTRIBUTES, 0,
645 &netfid, &oplock, NULL,
737b758c
SF		 646 cifs_sb->local_nls,
647 cifs_sb->mnt_cifs_flags &
648 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 649 if (rc==0) {
650 rc = CIFSSMBSetFileTimes(xid, pTcon,
651 pinfo_buf,
652 netfid);
653 CIFSSMBClose(xid, pTcon, netfid);
654 }
655 }
656 kfree(pinfo_buf);
657 }
658 if (rc==0) {
737b758c
SF		 659 rc = CIFSSMBDelFile(xid, pTcon, full_path,
660 cifs_sb->local_nls,
661 cifs_sb->mnt_cifs_flags &
662 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 663 if (!rc) {
d0d2f2df 664 if (direntry->d_inode)
b2aeb9d5 665 direntry->d_inode->i_nlink--;
1da177e4
LT		 666 } else if (rc == -ETXTBSY) {
667 int oplock = FALSE;
668 __u16 netfid;
669
670 rc = CIFSSMBOpen(xid, pTcon, full_path,
671 FILE_OPEN, DELETE,
672 CREATE_NOT_DIR |
673 CREATE_DELETE_ON_CLOSE,
674 &netfid, &oplock, NULL,
737b758c
SF		 675 cifs_sb->local_nls,
676 cifs_sb->mnt_cifs_flags &
677 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 678 if (rc==0) {
679 CIFSSMBRenameOpenFile(xid, pTcon,
680 netfid, NULL,
737b758c
SF		 681 cifs_sb->local_nls,
682 cifs_sb->mnt_cifs_flags &
683 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 684 CIFSSMBClose(xid, pTcon, netfid);
d0d2f2df 685 if (direntry->d_inode)
b2aeb9d5 686 direntry->d_inode->i_nlink--;
1da177e4
LT		 687 }
688 /* BB if rc = -ETXTBUSY goto the rename logic BB */
689 }
690 }
691 }
d0d2f2df 692 if (direntry->d_inode) {
b2aeb9d5
SF		 693 cifsInode = CIFS_I(direntry->d_inode);
694 cifsInode->time = 0; /* will force revalidate to get info
695 when needed */
696 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
697 }
06bcfedd
SF		 698 if(inode) {
699 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
700 cifsInode = CIFS_I(inode);
701 cifsInode->time = 0; /* force revalidate of dir as well */
702 }
1da177e4
LT		 703
704 kfree(full_path);
705 FreeXid(xid);
706 return rc;
707}
708
709int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
710{
711 int rc = 0;
712 int xid;
713 struct cifs_sb_info *cifs_sb;
714 struct cifsTconInfo *pTcon;
715 char *full_path = NULL;
716 struct inode *newinode = NULL;
717
6473a559 718 cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
1da177e4
LT		 719
720 xid = GetXid();
721
722 cifs_sb = CIFS_SB(inode->i_sb);
723 pTcon = cifs_sb->tcon;
724
7f57356b 725 full_path = build_path_from_dentry(direntry);
1da177e4
LT		 726 if (full_path == NULL) {
727 FreeXid(xid);
728 return -ENOMEM;
729 }
730 /* BB add setting the equivalent of mode via CreateX w/ACLs */
737b758c
SF		 731 rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
732 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 733 if (rc) {
26a21b98 734 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
1da177e4
LT		 735 d_drop(direntry);
736 } else {
737 inode->i_nlink++;
738 if (pTcon->ses->capabilities & CAP_UNIX)
739 rc = cifs_get_inode_info_unix(&newinode, full_path,
740 inode->i_sb,xid);
741 else
742 rc = cifs_get_inode_info(&newinode, full_path, NULL,
743 inode->i_sb,xid);
744
b92327fe
SF		 745 if (pTcon->nocase)
746 direntry->d_op = &cifs_ci_dentry_ops;
747 else
748 direntry->d_op = &cifs_dentry_ops;
1da177e4
LT		 749 d_instantiate(direntry, newinode);
750 if (direntry->d_inode)
751 direntry->d_inode->i_nlink = 2;
752 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
d0d2f2df 753 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1da177e4
LT		 754 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
755 mode,
83451879
SF		 756 (__u64)current->fsuid,
757 (__u64)current->fsgid,
1da177e4 758 0 /* dev_t */,
737b758c
SF		 759 cifs_sb->local_nls,
760 cifs_sb->mnt_cifs_flags &
761 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 762 } else {
763 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
764 mode, (__u64)-1,
765 (__u64)-1, 0 /* dev_t */,
737b758c
SF		 766 cifs_sb->local_nls,
767 cifs_sb->mnt_cifs_flags &
768 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 769 }
770 else {
771 /* BB to be implemented via Windows secrty descriptors
772 eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
773 -1, -1, local_nls); */
6473a559
SF		 774 if(direntry->d_inode) {
775 direntry->d_inode->i_mode = mode;
25741b3e 776 direntry->d_inode->i_mode |= S_IFDIR;
6473a559
SF		 777 if(cifs_sb->mnt_cifs_flags &
778 CIFS_MOUNT_SET_UID) {
779 direntry->d_inode->i_uid =
780 current->fsuid;
781 direntry->d_inode->i_gid =
782 current->fsgid;
783 }
784 }
2a138ebb 785 }
1da177e4
LT		 786 }
787 kfree(full_path);
788 FreeXid(xid);
789 return rc;
790}
791
792int cifs_rmdir(struct inode *inode, struct dentry *direntry)
793{
794 int rc = 0;
795 int xid;
796 struct cifs_sb_info *cifs_sb;
797 struct cifsTconInfo *pTcon;
798 char *full_path = NULL;
799 struct cifsInodeInfo *cifsInode;
800
26a21b98 801 cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
1da177e4
LT		 802
803 xid = GetXid();
804
805 cifs_sb = CIFS_SB(inode->i_sb);
806 pTcon = cifs_sb->tcon;
807
7f57356b 808 full_path = build_path_from_dentry(direntry);
1da177e4
LT		 809 if (full_path == NULL) {
810 FreeXid(xid);
811 return -ENOMEM;
812 }
813
737b758c
SF		 814 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
815 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 816
817 if (!rc) {
818 inode->i_nlink--;
819 i_size_write(direntry->d_inode,0);
820 direntry->d_inode->i_nlink = 0;
821 }
822
823 cifsInode = CIFS_I(direntry->d_inode);
824 cifsInode->time = 0; /* force revalidate to go get info when
825 needed */
826 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
827 current_fs_time(inode->i_sb);
828
829 kfree(full_path);
830 FreeXid(xid);
831 return rc;
832}
833
834int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
835 struct inode *target_inode, struct dentry *target_direntry)
836{
837 char *fromName;
838 char *toName;
839 struct cifs_sb_info *cifs_sb_source;
840 struct cifs_sb_info *cifs_sb_target;
841 struct cifsTconInfo *pTcon;
842 int xid;
843 int rc = 0;
844
845 xid = GetXid();
846
847 cifs_sb_target = CIFS_SB(target_inode->i_sb);
848 cifs_sb_source = CIFS_SB(source_inode->i_sb);
849 pTcon = cifs_sb_source->tcon;
850
851 if (pTcon != cifs_sb_target->tcon) {
852 FreeXid(xid);
853 return -EXDEV; /* BB actually could be allowed if same server,
854 but different share.
855 Might eventually add support for this */
856 }
857
858 /* we already have the rename sem so we do not need to grab it again
859 here to protect the path integrity */
7f57356b
SF		 860 fromName = build_path_from_dentry(source_direntry);
861 toName = build_path_from_dentry(target_direntry);
1da177e4
LT		 862 if ((fromName == NULL) || (toName == NULL)) {
863 rc = -ENOMEM;
864 goto cifs_rename_exit;
865 }
866
867 rc = CIFSSMBRename(xid, pTcon, fromName, toName,
737b758c
SF		 868 cifs_sb_source->local_nls,
869 cifs_sb_source->mnt_cifs_flags &
870 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 871 if (rc == -EEXIST) {
872 /* check if they are the same file because rename of hardlinked
873 files is a noop */
874 FILE_UNIX_BASIC_INFO *info_buf_source;
875 FILE_UNIX_BASIC_INFO *info_buf_target;
876
877 info_buf_source =
878 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
879 if (info_buf_source != NULL) {
880 info_buf_target = info_buf_source + 1;
881 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
737b758c
SF		 882 info_buf_source, cifs_sb_source->local_nls,
883 cifs_sb_source->mnt_cifs_flags &
884 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 885 if (rc == 0) {
886 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
887 info_buf_target,
737b758c
SF		 888 cifs_sb_target->local_nls,
889 /* remap based on source sb */
890 cifs_sb_source->mnt_cifs_flags &
891 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 892 }
893 if ((rc == 0) &&
894 (info_buf_source->UniqueId ==
895 info_buf_target->UniqueId)) {
896 /* do not rename since the files are hardlinked which
897 is a noop */
898 } else {
899 /* we either can not tell the files are hardlinked
900 (as with Windows servers) or files are not
901 hardlinked so delete the target manually before
902 renaming to follow POSIX rather than Windows
903 semantics */
904 cifs_unlink(target_inode, target_direntry);
905 rc = CIFSSMBRename(xid, pTcon, fromName,
906 toName,
737b758c
SF		 907 cifs_sb_source->local_nls,
908 cifs_sb_source->mnt_cifs_flags
909 & CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 910 }
911 kfree(info_buf_source);
912 } /* if we can not get memory just leave rc as EEXIST */
913 }
914
915 if (rc) {
916 cFYI(1, ("rename rc %d", rc));
917 }
918
919 if ((rc == -EIO) || (rc == -EEXIST)) {
920 int oplock = FALSE;
921 __u16 netfid;
922
923 /* BB FIXME Is Generic Read correct for rename? */
924 /* if renaming directory - we should not say CREATE_NOT_DIR,
925 need to test renaming open directory, also GENERIC_READ
926 might not right be right access to request */
927 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
928 CREATE_NOT_DIR, &netfid, &oplock, NULL,
737b758c
SF		 929 cifs_sb_source->local_nls,
930 cifs_sb_source->mnt_cifs_flags &
931 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 932 if (rc==0) {
933 CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
737b758c
SF		 934 cifs_sb_source->local_nls,
935 cifs_sb_source->mnt_cifs_flags &
936 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 937 CIFSSMBClose(xid, pTcon, netfid);
938 }
939 }
940
941cifs_rename_exit:
942 kfree(fromName);
943 kfree(toName);
944 FreeXid(xid);
945 return rc;
946}
947
948int cifs_revalidate(struct dentry *direntry)
949{
950 int xid;
951 int rc = 0;
952 char *full_path;
953 struct cifs_sb_info *cifs_sb;
954 struct cifsInodeInfo *cifsInode;
955 loff_t local_size;
956 struct timespec local_mtime;
957 int invalidate_inode = FALSE;
958
959 if (direntry->d_inode == NULL)
960 return -ENOENT;
961
962 cifsInode = CIFS_I(direntry->d_inode);
963
964 if (cifsInode == NULL)
965 return -ENOENT;
966
967 /* no sense revalidating inode info on file that no one can write */
968 if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
969 return rc;
970
971 xid = GetXid();
972
973 cifs_sb = CIFS_SB(direntry->d_sb);
974
975 /* can not safely grab the rename sem here if rename calls revalidate
976 since that would deadlock */
7f57356b 977 full_path = build_path_from_dentry(direntry);
1da177e4
LT		 978 if (full_path == NULL) {
979 FreeXid(xid);
980 return -ENOMEM;
981 }
982 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
983 "jiffies %ld", full_path, direntry->d_inode,
984 direntry->d_inode->i_count.counter, direntry,
985 direntry->d_time, jiffies));
986
987 if (cifsInode->time == 0) {
988 /* was set to zero previously to force revalidate */
989 } else if (time_before(jiffies, cifsInode->time + HZ) &&
990 lookupCacheEnabled) {
991 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
992 (direntry->d_inode->i_nlink == 1)) {
993 kfree(full_path);
994 FreeXid(xid);
995 return rc;
996 } else {
997 cFYI(1, ("Have to revalidate file due to hardlinks"));
998 }
999 }
1000
1001 /* save mtime and size */
1002 local_mtime = direntry->d_inode->i_mtime;
1003 local_size = direntry->d_inode->i_size;
1004
1005 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX) {
1006 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1007 direntry->d_sb,xid);
1008 if (rc) {
1009 cFYI(1, ("error on getting revalidate info %d", rc));
1010/* if (rc != -ENOENT)
1011 rc = 0; */ /* BB should we cache info on
1012 certain errors? */
1013 }
1014 } else {
1015 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1016 direntry->d_sb,xid);
1017 if (rc) {
1018 cFYI(1, ("error on getting revalidate info %d", rc));
1019/* if (rc != -ENOENT)
1020 rc = 0; */ /* BB should we cache info on
1021 certain errors? */
1022 }
1023 }
1024 /* should we remap certain errors, access denied?, to zero */
1025
1026 /* if not oplocked, we invalidate inode pages if mtime or file size
1027 had changed on server */
1028
1029 if (timespec_equal(&local_mtime,&direntry->d_inode->i_mtime) &&
1030 (local_size == direntry->d_inode->i_size)) {
1031 cFYI(1, ("cifs_revalidate - inode unchanged"));
1032 } else {
1033 /* file may have changed on server */
1034 if (cifsInode->clientCanCacheRead) {
1035 /* no need to invalidate inode pages since we were the
1036 only ones who could have modified the file and the
1037 server copy is staler than ours */
1038 } else {
1039 invalidate_inode = TRUE;
1040 }
1041 }
1042
1043 /* can not grab this sem since kernel filesys locking documentation
1b1dcc1b
JS		 1044 indicates i_mutex may be taken by the kernel on lookup and rename
1045 which could deadlock if we grab the i_mutex here as well */
1046/* mutex_lock(&direntry->d_inode->i_mutex);*/
1da177e4
LT		 1047 /* need to write out dirty pages here */
1048 if (direntry->d_inode->i_mapping) {
1049 /* do we need to lock inode until after invalidate completes
1050 below? */
1051 filemap_fdatawrite(direntry->d_inode->i_mapping);
1052 }
1053 if (invalidate_inode) {
3abb9272
SF		 1054 /* shrink_dcache not necessary now that cifs dentry ops
1055 are exported for negative dentries */
1056/* if(S_ISDIR(direntry->d_inode->i_mode))
1057 shrink_dcache_parent(direntry); */
1058 if (S_ISREG(direntry->d_inode->i_mode)) {
1059 if (direntry->d_inode->i_mapping)
1060 filemap_fdatawait(direntry->d_inode->i_mapping);
1061 /* may eventually have to do this for open files too */
1062 if (list_empty(&(cifsInode->openFileList))) {
1063 /* changed on server - flush read ahead pages */
1064 cFYI(1, ("Invalidating read ahead data on "
1065 "closed file"));
1066 invalidate_remote_inode(direntry->d_inode);
1067 }
1da177e4
LT		 1068 }
1069 }
1b1dcc1b 1070/* mutex_unlock(&direntry->d_inode->i_mutex); */
1da177e4
LT		 1071
1072 kfree(full_path);
1073 FreeXid(xid);
1074 return rc;
1075}
1076
1077int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1078 struct kstat *stat)
1079{
1080 int err = cifs_revalidate(dentry);
1081 if (!err)
1082 generic_fillattr(dentry->d_inode, stat);
1083 return err;
1084}
1085
1086static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1087{
1088 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1089 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1090 struct page *page;
1091 char *kaddr;
1092 int rc = 0;
1093
1094 page = grab_cache_page(mapping, index);
1095 if (!page)
1096 return -ENOMEM;
1097
1098 kaddr = kmap_atomic(page, KM_USER0);
1099 memset(kaddr + offset, 0, PAGE_CACHE_SIZE - offset);
1100 flush_dcache_page(page);
1101 kunmap_atomic(kaddr, KM_USER0);
1102 unlock_page(page);
1103 page_cache_release(page);
1104 return rc;
1105}
1106
1107int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1108{
1109 int xid;
1110 struct cifs_sb_info *cifs_sb;
1111 struct cifsTconInfo *pTcon;
1112 char *full_path = NULL;
1113 int rc = -EACCES;
1da177e4
LT		 1114 struct cifsFileInfo *open_file = NULL;
1115 FILE_BASIC_INFO time_buf;
1116 int set_time = FALSE;
1117 __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1118 __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1119 __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1120 struct cifsInodeInfo *cifsInode;
1da177e4
LT		 1121
1122 xid = GetXid();
1123
3979877e 1124 cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1da177e4 1125 direntry->d_name.name, attrs->ia_valid));
6473a559 1126
1da177e4
LT		 1127 cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
1128 pTcon = cifs_sb->tcon;
1129
2a138ebb 1130 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
6473a559
SF		 1131 /* check if we have permission to change attrs */
1132 rc = inode_change_ok(direntry->d_inode, attrs);
1133 if(rc < 0) {
1134 FreeXid(xid);
1135 return rc;
1136 } else
1137 rc = 0;
1138 }
1139
7f57356b 1140 full_path = build_path_from_dentry(direntry);
1da177e4
LT		 1141 if (full_path == NULL) {
1142 FreeXid(xid);
1143 return -ENOMEM;
1144 }
1145 cifsInode = CIFS_I(direntry->d_inode);
1146
1147 /* BB check if we need to refresh inode from server now ? BB */
1148
1149 /* need to flush data before changing file size on server */
28fd1298 1150 filemap_write_and_wait(direntry->d_inode->i_mapping);
1da177e4
LT		 1151
1152 if (attrs->ia_valid & ATTR_SIZE) {
1da177e4
LT		 1153 /* To avoid spurious oplock breaks from server, in the case of
1154 inodes that we already have open, avoid doing path based
1155 setting of file size if we can do it by handle.
1156 This keeps our caching token (oplock) and avoids timeouts
1157 when the local oplock break takes longer to flush
1158 writebehind data than the SMB timeout for the SetPathInfo
1159 request would allow */
3979877e 1160
6148a742
SF		 1161 open_file = find_writable_file(cifsInode);
1162 if (open_file) {
1163 __u16 nfid = open_file->netfid;
1164 __u32 npid = open_file->pid;
1165 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1166 nfid, npid, FALSE);
23e7dd7d 1167 atomic_dec(&open_file->wrtPending);
6148a742 1168 cFYI(1,("SetFSize for attrs rc = %d", rc));
083d3a2c 1169 if((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
6148a742
SF		 1170 int bytes_written;
1171 rc = CIFSSMBWrite(xid, pTcon,
1172 nfid, 0, attrs->ia_size,
1173 &bytes_written, NULL, NULL,
1174 1 /* 45 seconds */);
1175 cFYI(1,("Wrt seteof rc %d", rc));
1da177e4 1176 }
6473a559
SF		 1177 } else
1178 rc = -EINVAL;
1179
1da177e4
LT		 1180 if (rc != 0) {
1181 /* Set file size by pathname rather than by handle
1182 either because no valid, writeable file handle for
1183 it was found or because there was an error setting
1184 it by handle */
1185 rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1186 attrs->ia_size, FALSE,
737b758c
SF		 1187 cifs_sb->local_nls,
1188 cifs_sb->mnt_cifs_flags &
1189 CIFS_MOUNT_MAP_SPECIAL_CHR);
e30dcf3a 1190 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
083d3a2c 1191 if((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
e30dcf3a
SF		 1192 __u16 netfid;
1193 int oplock = FALSE;
1194
1195 rc = SMBLegacyOpen(xid, pTcon, full_path,
1196 FILE_OPEN,
1197 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1198 CREATE_NOT_DIR, &netfid, &oplock,
1199 NULL, cifs_sb->local_nls,
1200 cifs_sb->mnt_cifs_flags &
1201 CIFS_MOUNT_MAP_SPECIAL_CHR);
1202 if (rc==0) {
1203 int bytes_written;
1204 rc = CIFSSMBWrite(xid, pTcon,
1205 netfid, 0,
1206 attrs->ia_size,
1207 &bytes_written, NULL,
1208 NULL, 1 /* 45 sec */);
1209 cFYI(1,("wrt seteof rc %d",rc));
1210 CIFSSMBClose(xid, pTcon, netfid);
1211 }
1212
1213 }
1da177e4
LT		 1214 }
1215
1216 /* Server is ok setting allocation size implicitly - no need
1217 to call:
1218 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1219 cifs_sb->local_nls);
1220 */
1221
1222 if (rc == 0) {
1223 rc = vmtruncate(direntry->d_inode, attrs->ia_size);
1224 cifs_truncate_page(direntry->d_inode->i_mapping,
1225 direntry->d_inode->i_size);
e30dcf3a
SF		 1226 } else
1227 goto cifs_setattr_exit;
1da177e4
LT		 1228 }
1229 if (attrs->ia_valid & ATTR_UID) {
e30dcf3a 1230 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1da177e4 1231 uid = attrs->ia_uid;
1da177e4
LT		 1232 }
1233 if (attrs->ia_valid & ATTR_GID) {
e30dcf3a 1234 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1da177e4 1235 gid = attrs->ia_gid;
1da177e4
LT		 1236 }
1237
1238 time_buf.Attributes = 0;
1239 if (attrs->ia_valid & ATTR_MODE) {
e30dcf3a 1240 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1da177e4 1241 mode = attrs->ia_mode;
1da177e4
LT		 1242 }
1243
1244 if ((cifs_sb->tcon->ses->capabilities & CAP_UNIX)
1245 && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1246 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
737b758c
SF		 1247 0 /* dev_t */, cifs_sb->local_nls,
1248 cifs_sb->mnt_cifs_flags &
1249 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 1250 else if (attrs->ia_valid & ATTR_MODE) {
cdbce9c8 1251 rc = 0;
1da177e4
LT		 1252 if ((mode & S_IWUGO) == 0) /* not writeable */ {
1253 if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0)
1254 time_buf.Attributes =
1255 cpu_to_le32(cifsInode->cifsAttrs |
1256 ATTR_READONLY);
1257 } else if ((mode & S_IWUGO) == S_IWUGO) {
1258 if (cifsInode->cifsAttrs & ATTR_READONLY)
1259 time_buf.Attributes =
1260 cpu_to_le32(cifsInode->cifsAttrs &
1261 (~ATTR_READONLY));
1262 }
1263 /* BB to be implemented -
1264 via Windows security descriptors or streams */
1265 /* CIFSSMBWinSetPerms(xid, pTcon, full_path, mode, uid, gid,
1266 cifs_sb->local_nls); */
1267 }
1268
1269 if (attrs->ia_valid & ATTR_ATIME) {
1270 set_time = TRUE;
1271 time_buf.LastAccessTime =
1272 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1273 } else
1274 time_buf.LastAccessTime = 0;
1275
1276 if (attrs->ia_valid & ATTR_MTIME) {
1277 set_time = TRUE;
1278 time_buf.LastWriteTime =
1279 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1280 } else
1281 time_buf.LastWriteTime = 0;
e30dcf3a
SF		 1282 /* Do not set ctime explicitly unless other time
1283 stamps are changed explicitly (i.e. by utime()
1284 since we would then have a mix of client and
1285 server times */
1286
1287 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1da177e4 1288 set_time = TRUE;
e30dcf3a
SF		 1289 /* Although Samba throws this field away
1290 it may be useful to Windows - but we do
1291 not want to set ctime unless some other
1292 timestamp is changing */
26a21b98 1293 cFYI(1, ("CIFS - CTIME changed"));
1da177e4
LT		 1294 time_buf.ChangeTime =
1295 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1296 } else
1297 time_buf.ChangeTime = 0;
1298
1299 if (set_time || time_buf.Attributes) {
1da177e4
LT		 1300 time_buf.CreationTime = 0; /* do not change */
1301 /* In the future we should experiment - try setting timestamps
1302 via Handle (SetFileInfo) instead of by path */
1303 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1304 rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
737b758c
SF		 1305 cifs_sb->local_nls,
1306 cifs_sb->mnt_cifs_flags &
1307 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 1308 else
1309 rc = -EOPNOTSUPP;
1310
1311 if (rc == -EOPNOTSUPP) {
1312 int oplock = FALSE;
1313 __u16 netfid;
1314
1315 cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1316 "times not supported by this server"));
1317 /* BB we could scan to see if we already have it open
1318 and pass in pid of opener to function */
1319 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1320 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1321 CREATE_NOT_DIR, &netfid, &oplock,
737b758c
SF		 1322 NULL, cifs_sb->local_nls,
1323 cifs_sb->mnt_cifs_flags &
1324 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 1325 if (rc==0) {
1326 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1327 netfid);
1328 CIFSSMBClose(xid, pTcon, netfid);
1329 } else {
1330 /* BB For even older servers we could convert time_buf
1331 into old DOS style which uses two second
1332 granularity */
1333
1334 /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1335 &time_buf, cifs_sb->local_nls); */
1336 }
1337 }
e30dcf3a
SF		 1338 /* Even if error on time set, no sense failing the call if
1339 the server would set the time to a reasonable value anyway,
1340 and this check ensures that we are not being called from
1341 sys_utimes in which case we ought to fail the call back to
1342 the user when the server rejects the call */
1343 if((rc) && (attrs->ia_valid &&
1344 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1345 rc = 0;
1da177e4
LT		 1346 }
1347
1348 /* do not need local check to inode_check_ok since the server does
1349 that */
1350 if (!rc)
1351 rc = inode_setattr(direntry->d_inode, attrs);
e30dcf3a 1352cifs_setattr_exit:
1da177e4
LT		 1353 kfree(full_path);
1354 FreeXid(xid);
1355 return rc;
1356}
1357
1358void cifs_delete_inode(struct inode *inode)
1359{
26a21b98 1360 cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1da177e4
LT		 1361 /* may have to add back in if and when safe distributed caching of
1362 directories added e.g. via FindNotify */
1363}
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