[CIFS] ACL support part 5
[sfrench/cifs-2.6.git] / fs / cifs / inode.c
1 /*
2  *   fs/cifs/inode.c
3  *
4  *   Copyright (C) International Business Machines  Corp., 2002,2007
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/stat.h>
23 #include <linux/pagemap.h>
24 #include <asm/div64.h>
25 #include "cifsfs.h"
26 #include "cifspdu.h"
27 #include "cifsglob.h"
28 #include "cifsproto.h"
29 #include "cifs_debug.h"
30 #include "cifs_fs_sb.h"
31
32 int cifs_get_inode_info_unix(struct inode **pinode,
33         const unsigned char *search_path, struct super_block *sb, int xid)
34 {
35         int rc = 0;
36         FILE_UNIX_BASIC_INFO findData;
37         struct cifsTconInfo *pTcon;
38         struct inode *inode;
39         struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
40         char *tmp_path;
41
42         pTcon = cifs_sb->tcon;
43         cFYI(1, ("Getting info on %s", search_path));
44         /* could have done a find first instead but this returns more info */
45         rc = CIFSSMBUnixQPathInfo(xid, pTcon, search_path, &findData,
46                                   cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
47                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
48 /*      dump_mem("\nUnixQPathInfo return data", &findData,
49                  sizeof(findData)); */
50         if (rc) {
51                 if (rc == -EREMOTE) {
52                         tmp_path =
53                             kmalloc(strnlen(pTcon->treeName,
54                                             MAX_TREE_SIZE + 1) +
55                                     strnlen(search_path, MAX_PATHCONF) + 1,
56                                     GFP_KERNEL);
57                         if (tmp_path == NULL) {
58                                 return -ENOMEM;
59                         }
60                         /* have to skip first of the double backslash of
61                            UNC name */
62                         strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
63                         strncat(tmp_path, search_path, MAX_PATHCONF);
64                         rc = connect_to_dfs_path(xid, pTcon->ses,
65                                                  /* treename + */ tmp_path,
66                                                  cifs_sb->local_nls,
67                                                  cifs_sb->mnt_cifs_flags &
68                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
69                         kfree(tmp_path);
70
71                         /* BB fix up inode etc. */
72                 } else if (rc) {
73                         return rc;
74                 }
75         } else {
76                 struct cifsInodeInfo *cifsInfo;
77                 __u32 type = le32_to_cpu(findData.Type);
78                 __u64 num_of_bytes = le64_to_cpu(findData.NumOfBytes);
79                 __u64 end_of_file = le64_to_cpu(findData.EndOfFile);
80
81                 /* get new inode */
82                 if (*pinode == NULL) {
83                         *pinode = new_inode(sb);
84                         if (*pinode == NULL)
85                                 return -ENOMEM;
86                         /* Is an i_ino of zero legal? */
87                         /* Are there sanity checks we can use to ensure that
88                            the server is really filling in that field? */
89                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
90                                 (*pinode)->i_ino =
91                                         (unsigned long)findData.UniqueId;
92                         } /* note ino incremented to unique num in new_inode */
93                         if (sb->s_flags & MS_NOATIME)
94                                 (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
95
96                         insert_inode_hash(*pinode);
97                 }
98
99                 inode = *pinode;
100                 cifsInfo = CIFS_I(inode);
101
102                 cFYI(1, ("Old time %ld", cifsInfo->time));
103                 cifsInfo->time = jiffies;
104                 cFYI(1, ("New time %ld", cifsInfo->time));
105                 /* this is ok to set on every inode revalidate */
106                 atomic_set(&cifsInfo->inUse, 1);
107
108                 inode->i_atime =
109                     cifs_NTtimeToUnix(le64_to_cpu(findData.LastAccessTime));
110                 inode->i_mtime =
111                     cifs_NTtimeToUnix(le64_to_cpu
112                                 (findData.LastModificationTime));
113                 inode->i_ctime =
114                     cifs_NTtimeToUnix(le64_to_cpu(findData.LastStatusChange));
115                 inode->i_mode = le64_to_cpu(findData.Permissions);
116                 /* since we set the inode type below we need to mask off
117                    to avoid strange results if bits set above */
118                 inode->i_mode &= ~S_IFMT;
119                 if (type == UNIX_FILE) {
120                         inode->i_mode |= S_IFREG;
121                 } else if (type == UNIX_SYMLINK) {
122                         inode->i_mode |= S_IFLNK;
123                 } else if (type == UNIX_DIR) {
124                         inode->i_mode |= S_IFDIR;
125                 } else if (type == UNIX_CHARDEV) {
126                         inode->i_mode |= S_IFCHR;
127                         inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
128                                 le64_to_cpu(findData.DevMinor) & MINORMASK);
129                 } else if (type == UNIX_BLOCKDEV) {
130                         inode->i_mode |= S_IFBLK;
131                         inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
132                                 le64_to_cpu(findData.DevMinor) & MINORMASK);
133                 } else if (type == UNIX_FIFO) {
134                         inode->i_mode |= S_IFIFO;
135                 } else if (type == UNIX_SOCKET) {
136                         inode->i_mode |= S_IFSOCK;
137                 } else {
138                         /* safest to call it a file if we do not know */
139                         inode->i_mode |= S_IFREG;
140                         cFYI(1, ("unknown type %d", type));
141                 }
142
143                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
144                         inode->i_uid = cifs_sb->mnt_uid;
145                 else
146                         inode->i_uid = le64_to_cpu(findData.Uid);
147
148                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
149                         inode->i_gid = cifs_sb->mnt_gid;
150                 else
151                         inode->i_gid = le64_to_cpu(findData.Gid);
152
153                 inode->i_nlink = le64_to_cpu(findData.Nlinks);
154
155                 spin_lock(&inode->i_lock);
156                 if (is_size_safe_to_change(cifsInfo, end_of_file)) {
157                 /* can not safely change the file size here if the
158                    client is writing to it due to potential races */
159                         i_size_write(inode, end_of_file);
160
161                 /* blksize needs to be multiple of two. So safer to default to
162                 blksize and blkbits set in superblock so 2**blkbits and blksize
163                 will match rather than setting to:
164                 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
165
166                 /* This seems incredibly stupid but it turns out that i_blocks
167                    is not related to (i_size / i_blksize), instead 512 byte size
168                    is required for calculating num blocks */
169
170                 /* 512 bytes (2**9) is the fake blocksize that must be used */
171                 /* for this calculation */
172                         inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
173                 }
174                 spin_unlock(&inode->i_lock);
175
176                 if (num_of_bytes < end_of_file)
177                         cFYI(1, ("allocation size less than end of file"));
178                 cFYI(1, ("Size %ld and blocks %llu",
179                         (unsigned long) inode->i_size,
180                         (unsigned long long)inode->i_blocks));
181                 if (S_ISREG(inode->i_mode)) {
182                         cFYI(1, ("File inode"));
183                         inode->i_op = &cifs_file_inode_ops;
184                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
185                                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
186                                         inode->i_fop =
187                                                 &cifs_file_direct_nobrl_ops;
188                                 else
189                                         inode->i_fop = &cifs_file_direct_ops;
190                         } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
191                                 inode->i_fop = &cifs_file_nobrl_ops;
192                         else /* not direct, send byte range locks */
193                                 inode->i_fop = &cifs_file_ops;
194
195                         /* check if server can support readpages */
196                         if (pTcon->ses->server->maxBuf <
197                             PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
198                                 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
199                         else
200                                 inode->i_data.a_ops = &cifs_addr_ops;
201                 } else if (S_ISDIR(inode->i_mode)) {
202                         cFYI(1, ("Directory inode"));
203                         inode->i_op = &cifs_dir_inode_ops;
204                         inode->i_fop = &cifs_dir_ops;
205                 } else if (S_ISLNK(inode->i_mode)) {
206                         cFYI(1, ("Symbolic Link inode"));
207                         inode->i_op = &cifs_symlink_inode_ops;
208                 /* tmp_inode->i_fop = */ /* do not need to set to anything */
209                 } else {
210                         cFYI(1, ("Init special inode"));
211                         init_special_inode(inode, inode->i_mode,
212                                            inode->i_rdev);
213                 }
214         }
215         return rc;
216 }
217
218 static int decode_sfu_inode(struct inode *inode, __u64 size,
219                             const unsigned char *path,
220                             struct cifs_sb_info *cifs_sb, int xid)
221 {
222         int rc;
223         int oplock = FALSE;
224         __u16 netfid;
225         struct cifsTconInfo *pTcon = cifs_sb->tcon;
226         char buf[24];
227         unsigned int bytes_read;
228         char *pbuf;
229
230         pbuf = buf;
231
232         if (size == 0) {
233                 inode->i_mode |= S_IFIFO;
234                 return 0;
235         } else if (size < 8) {
236                 return -EINVAL;  /* EOPNOTSUPP? */
237         }
238
239         rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ,
240                          CREATE_NOT_DIR, &netfid, &oplock, NULL,
241                          cifs_sb->local_nls,
242                          cifs_sb->mnt_cifs_flags &
243                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
244         if (rc == 0) {
245                 int buf_type = CIFS_NO_BUFFER;
246                         /* Read header */
247                 rc = CIFSSMBRead(xid, pTcon,
248                                  netfid,
249                                  24 /* length */, 0 /* offset */,
250                                  &bytes_read, &pbuf, &buf_type);
251                 if ((rc == 0) && (bytes_read >= 8)) {
252                         if (memcmp("IntxBLK", pbuf, 8) == 0) {
253                                 cFYI(1, ("Block device"));
254                                 inode->i_mode |= S_IFBLK;
255                                 if (bytes_read == 24) {
256                                         /* we have enough to decode dev num */
257                                         __u64 mjr; /* major */
258                                         __u64 mnr; /* minor */
259                                         mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
260                                         mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
261                                         inode->i_rdev = MKDEV(mjr, mnr);
262                                 }
263                         } else if (memcmp("IntxCHR", pbuf, 8) == 0) {
264                                 cFYI(1, ("Char device"));
265                                 inode->i_mode |= S_IFCHR;
266                                 if (bytes_read == 24) {
267                                         /* we have enough to decode dev num */
268                                         __u64 mjr; /* major */
269                                         __u64 mnr; /* minor */
270                                         mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
271                                         mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
272                                         inode->i_rdev = MKDEV(mjr, mnr);
273                                 }
274                         } else if (memcmp("IntxLNK", pbuf, 7) == 0) {
275                                 cFYI(1, ("Symlink"));
276                                 inode->i_mode |= S_IFLNK;
277                         } else {
278                                 inode->i_mode |= S_IFREG; /* file? */
279                                 rc = -EOPNOTSUPP;
280                         }
281                 } else {
282                         inode->i_mode |= S_IFREG; /* then it is a file */
283                         rc = -EOPNOTSUPP; /* or some unknown SFU type */
284                 }
285                 CIFSSMBClose(xid, pTcon, netfid);
286         }
287         return rc;
288 }
289
290 #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID)  /* SETFILEBITS valid bits */
291
292 static int get_sfu_uid_mode(struct inode *inode,
293                         const unsigned char *path,
294                         struct cifs_sb_info *cifs_sb, int xid)
295 {
296 #ifdef CONFIG_CIFS_XATTR
297         ssize_t rc;
298         char ea_value[4];
299         __u32 mode;
300
301         rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS",
302                         ea_value, 4 /* size of buf */, cifs_sb->local_nls,
303                 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
304         if (rc < 0)
305                 return (int)rc;
306         else if (rc > 3) {
307                 mode = le32_to_cpu(*((__le32 *)ea_value));
308                 inode->i_mode &= ~SFBITS_MASK;
309                 cFYI(1, ("special bits 0%o org mode 0%o", mode, inode->i_mode));
310                 inode->i_mode = (mode &  SFBITS_MASK) | inode->i_mode;
311                 cFYI(1, ("special mode bits 0%o", mode));
312                 return 0;
313         } else {
314                 return 0;
315         }
316 #else
317         return -EOPNOTSUPP;
318 #endif
319 }
320
321 int cifs_get_inode_info(struct inode **pinode,
322         const unsigned char *search_path, FILE_ALL_INFO *pfindData,
323         struct super_block *sb, int xid)
324 {
325         int rc = 0;
326         struct cifsTconInfo *pTcon;
327         struct inode *inode;
328         struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
329         char *tmp_path;
330         char *buf = NULL;
331         int adjustTZ = FALSE;
332
333         pTcon = cifs_sb->tcon;
334         cFYI(1, ("Getting info on %s", search_path));
335
336         if ((pfindData == NULL) && (*pinode != NULL)) {
337                 if (CIFS_I(*pinode)->clientCanCacheRead) {
338                         cFYI(1, ("No need to revalidate cached inode sizes"));
339                         return rc;
340                 }
341         }
342
343         /* if file info not passed in then get it from server */
344         if (pfindData == NULL) {
345                 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
346                 if (buf == NULL)
347                         return -ENOMEM;
348                 pfindData = (FILE_ALL_INFO *)buf;
349                 /* could do find first instead but this returns more info */
350                 rc = CIFSSMBQPathInfo(xid, pTcon, search_path, pfindData,
351                               0 /* not legacy */,
352                               cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
353                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
354                 /* BB optimize code so we do not make the above call
355                 when server claims no NT SMB support and the above call
356                 failed at least once - set flag in tcon or mount */
357                 if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
358                         rc = SMBQueryInformation(xid, pTcon, search_path,
359                                         pfindData, cifs_sb->local_nls,
360                                         cifs_sb->mnt_cifs_flags &
361                                           CIFS_MOUNT_MAP_SPECIAL_CHR);
362                         adjustTZ = TRUE;
363                 }
364         }
365         /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
366         if (rc) {
367                 if (rc == -EREMOTE) {
368                         tmp_path =
369                             kmalloc(strnlen
370                                     (pTcon->treeName,
371                                      MAX_TREE_SIZE + 1) +
372                                     strnlen(search_path, MAX_PATHCONF) + 1,
373                                     GFP_KERNEL);
374                         if (tmp_path == NULL) {
375                                 kfree(buf);
376                                 return -ENOMEM;
377                         }
378
379                         strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
380                         strncat(tmp_path, search_path, MAX_PATHCONF);
381                         rc = connect_to_dfs_path(xid, pTcon->ses,
382                                                  /* treename + */ tmp_path,
383                                                  cifs_sb->local_nls,
384                                                  cifs_sb->mnt_cifs_flags &
385                                                    CIFS_MOUNT_MAP_SPECIAL_CHR);
386                         kfree(tmp_path);
387                         /* BB fix up inode etc. */
388                 } else if (rc) {
389                         kfree(buf);
390                         return rc;
391                 }
392         } else {
393                 struct cifsInodeInfo *cifsInfo;
394                 __u32 attr = le32_to_cpu(pfindData->Attributes);
395
396                 /* get new inode */
397                 if (*pinode == NULL) {
398                         *pinode = new_inode(sb);
399                         if (*pinode == NULL) {
400                                 kfree(buf);
401                                 return -ENOMEM;
402                         }
403                         /* Is an i_ino of zero legal? Can we use that to check
404                            if the server supports returning inode numbers?  Are
405                            there other sanity checks we can use to ensure that
406                            the server is really filling in that field? */
407
408                         /* We can not use the IndexNumber field by default from
409                            Windows or Samba (in ALL_INFO buf) but we can request
410                            it explicitly.  It may not be unique presumably if
411                            the server has multiple devices mounted under one
412                            share */
413
414                         /* There may be higher info levels that work but are
415                            there Windows server or network appliances for which
416                            IndexNumber field is not guaranteed unique? */
417
418                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
419                                 int rc1 = 0;
420                                 __u64 inode_num;
421
422                                 rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
423                                         search_path, &inode_num,
424                                         cifs_sb->local_nls,
425                                         cifs_sb->mnt_cifs_flags &
426                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
427                                 if (rc1) {
428                                         cFYI(1, ("GetSrvInodeNum rc %d", rc1));
429                                         /* BB EOPNOSUPP disable SERVER_INUM? */
430                                 } else /* do we need cast or hash to ino? */
431                                         (*pinode)->i_ino = inode_num;
432                         } /* else ino incremented to unique num in new_inode*/
433                         if (sb->s_flags & MS_NOATIME)
434                                 (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
435                         insert_inode_hash(*pinode);
436                 }
437                 inode = *pinode;
438                 cifsInfo = CIFS_I(inode);
439                 cifsInfo->cifsAttrs = attr;
440                 cFYI(1, ("Old time %ld", cifsInfo->time));
441                 cifsInfo->time = jiffies;
442                 cFYI(1, ("New time %ld", cifsInfo->time));
443
444                 /* blksize needs to be multiple of two. So safer to default to
445                 blksize and blkbits set in superblock so 2**blkbits and blksize
446                 will match rather than setting to:
447                 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
448
449                 /* Linux can not store file creation time so ignore it */
450                 if (pfindData->LastAccessTime)
451                         inode->i_atime = cifs_NTtimeToUnix
452                                 (le64_to_cpu(pfindData->LastAccessTime));
453                 else /* do not need to use current_fs_time - time not stored */
454                         inode->i_atime = CURRENT_TIME;
455                 inode->i_mtime =
456                     cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
457                 inode->i_ctime =
458                     cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
459                 cFYI(0, ("Attributes came in as 0x%x", attr));
460                 if (adjustTZ && (pTcon->ses) && (pTcon->ses->server)) {
461                         inode->i_ctime.tv_sec += pTcon->ses->server->timeAdj;
462                         inode->i_mtime.tv_sec += pTcon->ses->server->timeAdj;
463                 }
464
465                 /* set default mode. will override for dirs below */
466                 if (atomic_read(&cifsInfo->inUse) == 0)
467                         /* new inode, can safely set these fields */
468                         inode->i_mode = cifs_sb->mnt_file_mode;
469                 else /* since we set the inode type below we need to mask off
470                      to avoid strange results if type changes and both
471                      get orred in */
472                         inode->i_mode &= ~S_IFMT;
473 /*              if (attr & ATTR_REPARSE)  */
474                 /* We no longer handle these as symlinks because we could not
475                    follow them due to the absolute path with drive letter */
476                 if (attr & ATTR_DIRECTORY) {
477                 /* override default perms since we do not do byte range locking
478                    on dirs */
479                         inode->i_mode = cifs_sb->mnt_dir_mode;
480                         inode->i_mode |= S_IFDIR;
481                 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
482                            (cifsInfo->cifsAttrs & ATTR_SYSTEM) &&
483                            /* No need to le64 convert size of zero */
484                            (pfindData->EndOfFile == 0)) {
485                         inode->i_mode = cifs_sb->mnt_file_mode;
486                         inode->i_mode |= S_IFIFO;
487 /* BB Finish for SFU style symlinks and devices */
488                 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
489                            (cifsInfo->cifsAttrs & ATTR_SYSTEM)) {
490                         if (decode_sfu_inode(inode,
491                                          le64_to_cpu(pfindData->EndOfFile),
492                                          search_path,
493                                          cifs_sb, xid)) {
494                                 cFYI(1, ("Unrecognized sfu inode type"));
495                         }
496                         cFYI(1, ("sfu mode 0%o", inode->i_mode));
497                 } else {
498                         inode->i_mode |= S_IFREG;
499                         /* treat the dos attribute of read-only as read-only
500                            mode e.g. 555 */
501                         if (cifsInfo->cifsAttrs & ATTR_READONLY)
502                                 inode->i_mode &= ~(S_IWUGO);
503                         else if ((inode->i_mode & S_IWUGO) == 0)
504                                 /* the ATTR_READONLY flag may have been */
505                                 /* changed on server -- set any w bits  */
506                                 /* allowed by mnt_file_mode             */
507                                 inode->i_mode |= (S_IWUGO &
508                                                   cifs_sb->mnt_file_mode);
509                 /* BB add code here -
510                    validate if device or weird share or device type? */
511                 }
512
513                 spin_lock(&inode->i_lock);
514                 if (is_size_safe_to_change(cifsInfo, le64_to_cpu(pfindData->EndOfFile))) {
515                         /* can not safely shrink the file size here if the
516                            client is writing to it due to potential races */
517                         i_size_write(inode, le64_to_cpu(pfindData->EndOfFile));
518
519                         /* 512 bytes (2**9) is the fake blocksize that must be
520                            used for this calculation */
521                         inode->i_blocks = (512 - 1 + le64_to_cpu(
522                                            pfindData->AllocationSize)) >> 9;
523                 }
524                 spin_unlock(&inode->i_lock);
525
526                 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
527
528                 /* BB fill in uid and gid here? with help from winbind?
529                    or retrieve from NTFS stream extended attribute */
530 #ifdef CONFIG_CIFS_EXPERIMENTAL
531                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
532                         cFYI(1, ("Getting mode bits from ACL"));
533                         get_mode_from_acl(inode, search_path);
534                 }
535 #endif
536                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
537                         /* fill in uid, gid, mode from server ACL */
538                         /* BB FIXME this should also take into account the
539                          * default uid specified on mount if present */
540                         get_sfu_uid_mode(inode, search_path, cifs_sb, xid);
541                 } else if (atomic_read(&cifsInfo->inUse) == 0) {
542                         inode->i_uid = cifs_sb->mnt_uid;
543                         inode->i_gid = cifs_sb->mnt_gid;
544                         /* set so we do not keep refreshing these fields with
545                            bad data after user has changed them in memory */
546                         atomic_set(&cifsInfo->inUse, 1);
547                 }
548
549                 if (S_ISREG(inode->i_mode)) {
550                         cFYI(1, ("File inode"));
551                         inode->i_op = &cifs_file_inode_ops;
552                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
553                                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
554                                         inode->i_fop =
555                                                 &cifs_file_direct_nobrl_ops;
556                                 else
557                                         inode->i_fop = &cifs_file_direct_ops;
558                         } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
559                                 inode->i_fop = &cifs_file_nobrl_ops;
560                         else /* not direct, send byte range locks */
561                                 inode->i_fop = &cifs_file_ops;
562
563                         if (pTcon->ses->server->maxBuf <
564                              PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
565                                 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
566                         else
567                                 inode->i_data.a_ops = &cifs_addr_ops;
568                 } else if (S_ISDIR(inode->i_mode)) {
569                         cFYI(1, ("Directory inode"));
570                         inode->i_op = &cifs_dir_inode_ops;
571                         inode->i_fop = &cifs_dir_ops;
572                 } else if (S_ISLNK(inode->i_mode)) {
573                         cFYI(1, ("Symbolic Link inode"));
574                         inode->i_op = &cifs_symlink_inode_ops;
575                 } else {
576                         init_special_inode(inode, inode->i_mode,
577                                            inode->i_rdev);
578                 }
579         }
580         kfree(buf);
581         return rc;
582 }
583
584 static const struct inode_operations cifs_ipc_inode_ops = {
585         .lookup = cifs_lookup,
586 };
587
588 /* gets root inode */
589 void cifs_read_inode(struct inode *inode)
590 {
591         int xid, rc;
592         struct cifs_sb_info *cifs_sb;
593
594         cifs_sb = CIFS_SB(inode->i_sb);
595         xid = GetXid();
596
597         if (cifs_sb->tcon->unix_ext)
598                 rc = cifs_get_inode_info_unix(&inode, "", inode->i_sb, xid);
599         else
600                 rc = cifs_get_inode_info(&inode, "", NULL, inode->i_sb, xid);
601         if (rc && cifs_sb->tcon->ipc) {
602                 cFYI(1, ("ipc connection - fake read inode"));
603                 inode->i_mode |= S_IFDIR;
604                 inode->i_nlink = 2;
605                 inode->i_op = &cifs_ipc_inode_ops;
606                 inode->i_fop = &simple_dir_operations;
607                 inode->i_uid = cifs_sb->mnt_uid;
608                 inode->i_gid = cifs_sb->mnt_gid;
609         }
610
611         /* can not call macro FreeXid here since in a void func */
612         _FreeXid(xid);
613 }
614
615 int cifs_unlink(struct inode *inode, struct dentry *direntry)
616 {
617         int rc = 0;
618         int xid;
619         struct cifs_sb_info *cifs_sb;
620         struct cifsTconInfo *pTcon;
621         char *full_path = NULL;
622         struct cifsInodeInfo *cifsInode;
623         FILE_BASIC_INFO *pinfo_buf;
624
625         cFYI(1, ("cifs_unlink, inode = 0x%p", inode));
626
627         xid = GetXid();
628
629         if (inode)
630                 cifs_sb = CIFS_SB(inode->i_sb);
631         else
632                 cifs_sb = CIFS_SB(direntry->d_sb);
633         pTcon = cifs_sb->tcon;
634
635         /* Unlink can be called from rename so we can not grab the sem here
636            since we deadlock otherwise */
637 /*      mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/
638         full_path = build_path_from_dentry(direntry);
639 /*      mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/
640         if (full_path == NULL) {
641                 FreeXid(xid);
642                 return -ENOMEM;
643         }
644
645         if ((pTcon->ses->capabilities & CAP_UNIX) &&
646                 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
647                         le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
648                 rc = CIFSPOSIXDelFile(xid, pTcon, full_path,
649                         SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
650                         cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
651                 cFYI(1, ("posix del rc %d", rc));
652                 if ((rc == 0) || (rc == -ENOENT))
653                         goto psx_del_no_retry;
654         }
655
656         rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
657                         cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
658 psx_del_no_retry:
659         if (!rc) {
660                 if (direntry->d_inode)
661                         drop_nlink(direntry->d_inode);
662         } else if (rc == -ENOENT) {
663                 d_drop(direntry);
664         } else if (rc == -ETXTBSY) {
665                 int oplock = FALSE;
666                 __u16 netfid;
667
668                 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
669                                  CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
670                                  &netfid, &oplock, NULL, cifs_sb->local_nls,
671                                  cifs_sb->mnt_cifs_flags &
672                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
673                 if (rc == 0) {
674                         CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
675                                               cifs_sb->local_nls,
676                                               cifs_sb->mnt_cifs_flags &
677                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
678                         CIFSSMBClose(xid, pTcon, netfid);
679                         if (direntry->d_inode)
680                                 drop_nlink(direntry->d_inode);
681                 }
682         } else if (rc == -EACCES) {
683                 /* try only if r/o attribute set in local lookup data? */
684                 pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
685                 if (pinfo_buf) {
686                         /* ATTRS set to normal clears r/o bit */
687                         pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
688                         if (!(pTcon->ses->flags & CIFS_SES_NT4))
689                                 rc = CIFSSMBSetTimes(xid, pTcon, full_path,
690                                                      pinfo_buf,
691                                                      cifs_sb->local_nls,
692                                                      cifs_sb->mnt_cifs_flags &
693                                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
694                         else
695                                 rc = -EOPNOTSUPP;
696
697                         if (rc == -EOPNOTSUPP) {
698                                 int oplock = FALSE;
699                                 __u16 netfid;
700                         /*      rc = CIFSSMBSetAttrLegacy(xid, pTcon,
701                                                           full_path,
702                                                           (__u16)ATTR_NORMAL,
703                                                           cifs_sb->local_nls);
704                            For some strange reason it seems that NT4 eats the
705                            old setattr call without actually setting the
706                            attributes so on to the third attempted workaround
707                            */
708
709                         /* BB could scan to see if we already have it open
710                            and pass in pid of opener to function */
711                                 rc = CIFSSMBOpen(xid, pTcon, full_path,
712                                                  FILE_OPEN, SYNCHRONIZE |
713                                                  FILE_WRITE_ATTRIBUTES, 0,
714                                                  &netfid, &oplock, NULL,
715                                                  cifs_sb->local_nls,
716                                                  cifs_sb->mnt_cifs_flags &
717                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
718                                 if (rc == 0) {
719                                         rc = CIFSSMBSetFileTimes(xid, pTcon,
720                                                                  pinfo_buf,
721                                                                  netfid);
722                                         CIFSSMBClose(xid, pTcon, netfid);
723                                 }
724                         }
725                         kfree(pinfo_buf);
726                 }
727                 if (rc == 0) {
728                         rc = CIFSSMBDelFile(xid, pTcon, full_path,
729                                             cifs_sb->local_nls,
730                                             cifs_sb->mnt_cifs_flags &
731                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
732                         if (!rc) {
733                                 if (direntry->d_inode)
734                                         drop_nlink(direntry->d_inode);
735                         } else if (rc == -ETXTBSY) {
736                                 int oplock = FALSE;
737                                 __u16 netfid;
738
739                                 rc = CIFSSMBOpen(xid, pTcon, full_path,
740                                                  FILE_OPEN, DELETE,
741                                                  CREATE_NOT_DIR |
742                                                  CREATE_DELETE_ON_CLOSE,
743                                                  &netfid, &oplock, NULL,
744                                                  cifs_sb->local_nls,
745                                                  cifs_sb->mnt_cifs_flags &
746                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
747                                 if (rc == 0) {
748                                         CIFSSMBRenameOpenFile(xid, pTcon,
749                                                 netfid, NULL,
750                                                 cifs_sb->local_nls,
751                                                 cifs_sb->mnt_cifs_flags &
752                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
753                                         CIFSSMBClose(xid, pTcon, netfid);
754                                         if (direntry->d_inode)
755                                                 drop_nlink(direntry->d_inode);
756                                 }
757                         /* BB if rc = -ETXTBUSY goto the rename logic BB */
758                         }
759                 }
760         }
761         if (direntry->d_inode) {
762                 cifsInode = CIFS_I(direntry->d_inode);
763                 cifsInode->time = 0;    /* will force revalidate to get info
764                                            when needed */
765                 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
766         }
767         if (inode) {
768                 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
769                 cifsInode = CIFS_I(inode);
770                 cifsInode->time = 0;    /* force revalidate of dir as well */
771         }
772
773         kfree(full_path);
774         FreeXid(xid);
775         return rc;
776 }
777
778 static void posix_fill_in_inode(struct inode *tmp_inode,
779         FILE_UNIX_BASIC_INFO *pData, int *pobject_type, int isNewInode)
780 {
781         loff_t local_size;
782         struct timespec local_mtime;
783
784         struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
785         struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
786
787         __u32 type = le32_to_cpu(pData->Type);
788         __u64 num_of_bytes = le64_to_cpu(pData->NumOfBytes);
789         __u64 end_of_file = le64_to_cpu(pData->EndOfFile);
790         cifsInfo->time = jiffies;
791         atomic_inc(&cifsInfo->inUse);
792
793         /* save mtime and size */
794         local_mtime = tmp_inode->i_mtime;
795         local_size  = tmp_inode->i_size;
796
797         tmp_inode->i_atime =
798             cifs_NTtimeToUnix(le64_to_cpu(pData->LastAccessTime));
799         tmp_inode->i_mtime =
800             cifs_NTtimeToUnix(le64_to_cpu(pData->LastModificationTime));
801         tmp_inode->i_ctime =
802             cifs_NTtimeToUnix(le64_to_cpu(pData->LastStatusChange));
803
804         tmp_inode->i_mode = le64_to_cpu(pData->Permissions);
805         /* since we set the inode type below we need to mask off type
806            to avoid strange results if bits above were corrupt */
807         tmp_inode->i_mode &= ~S_IFMT;
808         if (type == UNIX_FILE) {
809                 *pobject_type = DT_REG;
810                 tmp_inode->i_mode |= S_IFREG;
811         } else if (type == UNIX_SYMLINK) {
812                 *pobject_type = DT_LNK;
813                 tmp_inode->i_mode |= S_IFLNK;
814         } else if (type == UNIX_DIR) {
815                 *pobject_type = DT_DIR;
816                 tmp_inode->i_mode |= S_IFDIR;
817         } else if (type == UNIX_CHARDEV) {
818                 *pobject_type = DT_CHR;
819                 tmp_inode->i_mode |= S_IFCHR;
820                 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pData->DevMajor),
821                                 le64_to_cpu(pData->DevMinor) & MINORMASK);
822         } else if (type == UNIX_BLOCKDEV) {
823                 *pobject_type = DT_BLK;
824                 tmp_inode->i_mode |= S_IFBLK;
825                 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pData->DevMajor),
826                                 le64_to_cpu(pData->DevMinor) & MINORMASK);
827         } else if (type == UNIX_FIFO) {
828                 *pobject_type = DT_FIFO;
829                 tmp_inode->i_mode |= S_IFIFO;
830         } else if (type == UNIX_SOCKET) {
831                 *pobject_type = DT_SOCK;
832                 tmp_inode->i_mode |= S_IFSOCK;
833         } else {
834                 /* safest to just call it a file */
835                 *pobject_type = DT_REG;
836                 tmp_inode->i_mode |= S_IFREG;
837                 cFYI(1, ("unknown inode type %d", type));
838         }
839
840 #ifdef CONFIG_CIFS_DEBUG2
841         cFYI(1, ("object type: %d", type));
842 #endif
843         tmp_inode->i_uid = le64_to_cpu(pData->Uid);
844         tmp_inode->i_gid = le64_to_cpu(pData->Gid);
845         tmp_inode->i_nlink = le64_to_cpu(pData->Nlinks);
846
847         spin_lock(&tmp_inode->i_lock);
848         if (is_size_safe_to_change(cifsInfo, end_of_file)) {
849                 /* can not safely change the file size here if the
850                 client is writing to it due to potential races */
851                 i_size_write(tmp_inode, end_of_file);
852
853         /* 512 bytes (2**9) is the fake blocksize that must be used */
854         /* for this calculation, not the real blocksize */
855                 tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
856         }
857         spin_unlock(&tmp_inode->i_lock);
858
859         if (S_ISREG(tmp_inode->i_mode)) {
860                 cFYI(1, ("File inode"));
861                 tmp_inode->i_op = &cifs_file_inode_ops;
862
863                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
864                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
865                                 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
866                         else
867                                 tmp_inode->i_fop = &cifs_file_direct_ops;
868
869                 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
870                         tmp_inode->i_fop = &cifs_file_nobrl_ops;
871                 else
872                         tmp_inode->i_fop = &cifs_file_ops;
873
874                 if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
875                    (cifs_sb->tcon->ses->server->maxBuf <
876                         PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
877                         tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
878                 else
879                         tmp_inode->i_data.a_ops = &cifs_addr_ops;
880
881                 if (isNewInode)
882                         return; /* No sense invalidating pages for new inode
883                                    since we we have not started caching
884                                    readahead file data yet */
885
886                 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
887                         (local_size == tmp_inode->i_size)) {
888                         cFYI(1, ("inode exists but unchanged"));
889                 } else {
890                         /* file may have changed on server */
891                         cFYI(1, ("invalidate inode, readdir detected change"));
892                         invalidate_remote_inode(tmp_inode);
893                 }
894         } else if (S_ISDIR(tmp_inode->i_mode)) {
895                 cFYI(1, ("Directory inode"));
896                 tmp_inode->i_op = &cifs_dir_inode_ops;
897                 tmp_inode->i_fop = &cifs_dir_ops;
898         } else if (S_ISLNK(tmp_inode->i_mode)) {
899                 cFYI(1, ("Symbolic Link inode"));
900                 tmp_inode->i_op = &cifs_symlink_inode_ops;
901 /* tmp_inode->i_fop = *//* do not need to set to anything */
902         } else {
903                 cFYI(1, ("Special inode"));
904                 init_special_inode(tmp_inode, tmp_inode->i_mode,
905                                    tmp_inode->i_rdev);
906         }
907 }
908
909 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
910 {
911         int rc = 0;
912         int xid;
913         struct cifs_sb_info *cifs_sb;
914         struct cifsTconInfo *pTcon;
915         char *full_path = NULL;
916         struct inode *newinode = NULL;
917
918         cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
919
920         xid = GetXid();
921
922         cifs_sb = CIFS_SB(inode->i_sb);
923         pTcon = cifs_sb->tcon;
924
925         full_path = build_path_from_dentry(direntry);
926         if (full_path == NULL) {
927                 FreeXid(xid);
928                 return -ENOMEM;
929         }
930
931         if ((pTcon->ses->capabilities & CAP_UNIX) &&
932                 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
933                         le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
934                 u32 oplock = 0;
935                 FILE_UNIX_BASIC_INFO * pInfo =
936                         kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
937                 if (pInfo == NULL) {
938                         rc = -ENOMEM;
939                         goto mkdir_out;
940                 }
941
942                 mode &= ~current->fs->umask;
943                 rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT,
944                                 mode, NULL /* netfid */, pInfo, &oplock,
945                                 full_path, cifs_sb->local_nls,
946                                 cifs_sb->mnt_cifs_flags &
947                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
948                 if (rc == -EOPNOTSUPP) {
949                         kfree(pInfo);
950                         goto mkdir_retry_old;
951                 } else if (rc) {
952                         cFYI(1, ("posix mkdir returned 0x%x", rc));
953                         d_drop(direntry);
954                 } else {
955                         int obj_type;
956                         if (pInfo->Type == cpu_to_le32(-1)) {
957                                 /* no return info, go query for it */
958                                 kfree(pInfo);
959                                 goto mkdir_get_info;
960                         }
961 /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
962         to set uid/gid */
963                         inc_nlink(inode);
964                         if (pTcon->nocase)
965                                 direntry->d_op = &cifs_ci_dentry_ops;
966                         else
967                                 direntry->d_op = &cifs_dentry_ops;
968
969                         newinode = new_inode(inode->i_sb);
970                         if (newinode == NULL) {
971                                 kfree(pInfo);
972                                 goto mkdir_get_info;
973                         }
974                         /* Is an i_ino of zero legal? */
975                         /* Are there sanity checks we can use to ensure that
976                            the server is really filling in that field? */
977                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
978                                 newinode->i_ino =
979                                         (unsigned long)pInfo->UniqueId;
980                         } /* note ino incremented to unique num in new_inode */
981                         if (inode->i_sb->s_flags & MS_NOATIME)
982                                 newinode->i_flags |= S_NOATIME | S_NOCMTIME;
983                         newinode->i_nlink = 2;
984
985                         insert_inode_hash(newinode);
986                         d_instantiate(direntry, newinode);
987
988                         /* we already checked in POSIXCreate whether
989                            frame was long enough */
990                         posix_fill_in_inode(direntry->d_inode,
991                                         pInfo, &obj_type, 1 /* NewInode */);
992 #ifdef CONFIG_CIFS_DEBUG2
993                         cFYI(1, ("instantiated dentry %p %s to inode %p",
994                                 direntry, direntry->d_name.name, newinode));
995
996                         if (newinode->i_nlink != 2)
997                                 cFYI(1, ("unexpected number of links %d",
998                                         newinode->i_nlink));
999 #endif
1000                 }
1001                 kfree(pInfo);
1002                 goto mkdir_out;
1003         }
1004 mkdir_retry_old:
1005         /* BB add setting the equivalent of mode via CreateX w/ACLs */
1006         rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
1007                           cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1008         if (rc) {
1009                 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
1010                 d_drop(direntry);
1011         } else {
1012 mkdir_get_info:
1013                 inc_nlink(inode);
1014                 if (pTcon->unix_ext)
1015                         rc = cifs_get_inode_info_unix(&newinode, full_path,
1016                                                       inode->i_sb, xid);
1017                 else
1018                         rc = cifs_get_inode_info(&newinode, full_path, NULL,
1019                                                  inode->i_sb, xid);
1020
1021                 if (pTcon->nocase)
1022                         direntry->d_op = &cifs_ci_dentry_ops;
1023                 else
1024                         direntry->d_op = &cifs_dentry_ops;
1025                 d_instantiate(direntry, newinode);
1026                  /* setting nlink not necessary except in cases where we
1027                   * failed to get it from the server or was set bogus */
1028                 if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
1029                                 direntry->d_inode->i_nlink = 2;
1030                 if (pTcon->unix_ext) {
1031                         mode &= ~current->fs->umask;
1032                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1033                                 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1034                                                     mode,
1035                                                     (__u64)current->fsuid,
1036                                                     (__u64)current->fsgid,
1037                                                     0 /* dev_t */,
1038                                                     cifs_sb->local_nls,
1039                                                     cifs_sb->mnt_cifs_flags &
1040                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
1041                         } else {
1042                                 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1043                                                     mode, (__u64)-1,
1044                                                     (__u64)-1, 0 /* dev_t */,
1045                                                     cifs_sb->local_nls,
1046                                                     cifs_sb->mnt_cifs_flags &
1047                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
1048                         }
1049                 } else {
1050                         /* BB to be implemented via Windows secrty descriptors
1051                            eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
1052                                                  -1, -1, local_nls); */
1053                         if (direntry->d_inode) {
1054                                 direntry->d_inode->i_mode = mode;
1055                                 direntry->d_inode->i_mode |= S_IFDIR;
1056                                 if (cifs_sb->mnt_cifs_flags &
1057                                      CIFS_MOUNT_SET_UID) {
1058                                         direntry->d_inode->i_uid =
1059                                                 current->fsuid;
1060                                         direntry->d_inode->i_gid =
1061                                                 current->fsgid;
1062                                 }
1063                         }
1064                 }
1065         }
1066 mkdir_out:
1067         kfree(full_path);
1068         FreeXid(xid);
1069         return rc;
1070 }
1071
1072 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1073 {
1074         int rc = 0;
1075         int xid;
1076         struct cifs_sb_info *cifs_sb;
1077         struct cifsTconInfo *pTcon;
1078         char *full_path = NULL;
1079         struct cifsInodeInfo *cifsInode;
1080
1081         cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
1082
1083         xid = GetXid();
1084
1085         cifs_sb = CIFS_SB(inode->i_sb);
1086         pTcon = cifs_sb->tcon;
1087
1088         full_path = build_path_from_dentry(direntry);
1089         if (full_path == NULL) {
1090                 FreeXid(xid);
1091                 return -ENOMEM;
1092         }
1093
1094         rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1095                           cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1096
1097         if (!rc) {
1098                 drop_nlink(inode);
1099                 spin_lock(&direntry->d_inode->i_lock);
1100                 i_size_write(direntry->d_inode, 0);
1101                 clear_nlink(direntry->d_inode);
1102                 spin_unlock(&direntry->d_inode->i_lock);
1103         }
1104
1105         cifsInode = CIFS_I(direntry->d_inode);
1106         cifsInode->time = 0;    /* force revalidate to go get info when
1107                                    needed */
1108         direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1109                 current_fs_time(inode->i_sb);
1110
1111         kfree(full_path);
1112         FreeXid(xid);
1113         return rc;
1114 }
1115
1116 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
1117         struct inode *target_inode, struct dentry *target_direntry)
1118 {
1119         char *fromName;
1120         char *toName;
1121         struct cifs_sb_info *cifs_sb_source;
1122         struct cifs_sb_info *cifs_sb_target;
1123         struct cifsTconInfo *pTcon;
1124         int xid;
1125         int rc = 0;
1126
1127         xid = GetXid();
1128
1129         cifs_sb_target = CIFS_SB(target_inode->i_sb);
1130         cifs_sb_source = CIFS_SB(source_inode->i_sb);
1131         pTcon = cifs_sb_source->tcon;
1132
1133         if (pTcon != cifs_sb_target->tcon) {
1134                 FreeXid(xid);
1135                 return -EXDEV;  /* BB actually could be allowed if same server,
1136                                    but different share.
1137                                    Might eventually add support for this */
1138         }
1139
1140         /* we already  have the rename sem so we do not need to grab it again
1141            here to protect the path integrity */
1142         fromName = build_path_from_dentry(source_direntry);
1143         toName = build_path_from_dentry(target_direntry);
1144         if ((fromName == NULL) || (toName == NULL)) {
1145                 rc = -ENOMEM;
1146                 goto cifs_rename_exit;
1147         }
1148
1149         rc = CIFSSMBRename(xid, pTcon, fromName, toName,
1150                            cifs_sb_source->local_nls,
1151                            cifs_sb_source->mnt_cifs_flags &
1152                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1153         if (rc == -EEXIST) {
1154                 /* check if they are the same file because rename of hardlinked
1155                    files is a noop */
1156                 FILE_UNIX_BASIC_INFO *info_buf_source;
1157                 FILE_UNIX_BASIC_INFO *info_buf_target;
1158
1159                 info_buf_source =
1160                         kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1161                 if (info_buf_source != NULL) {
1162                         info_buf_target = info_buf_source + 1;
1163                         if (pTcon->unix_ext)
1164                                 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
1165                                         info_buf_source,
1166                                         cifs_sb_source->local_nls,
1167                                         cifs_sb_source->mnt_cifs_flags &
1168                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1169                         /* else rc is still EEXIST so will fall through to
1170                            unlink the target and retry rename */
1171                         if (rc == 0) {
1172                                 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
1173                                                 info_buf_target,
1174                                                 cifs_sb_target->local_nls,
1175                                                 /* remap based on source sb */
1176                                                 cifs_sb_source->mnt_cifs_flags &
1177                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
1178                         }
1179                         if ((rc == 0) &&
1180                             (info_buf_source->UniqueId ==
1181                              info_buf_target->UniqueId)) {
1182                         /* do not rename since the files are hardlinked which
1183                            is a noop */
1184                         } else {
1185                         /* we either can not tell the files are hardlinked
1186                            (as with Windows servers) or files are not
1187                            hardlinked so delete the target manually before
1188                            renaming to follow POSIX rather than Windows
1189                            semantics */
1190                                 cifs_unlink(target_inode, target_direntry);
1191                                 rc = CIFSSMBRename(xid, pTcon, fromName,
1192                                                    toName,
1193                                                    cifs_sb_source->local_nls,
1194                                                    cifs_sb_source->mnt_cifs_flags
1195                                                    & CIFS_MOUNT_MAP_SPECIAL_CHR);
1196                         }
1197                         kfree(info_buf_source);
1198                 } /* if we can not get memory just leave rc as EEXIST */
1199         }
1200
1201         if (rc) {
1202                 cFYI(1, ("rename rc %d", rc));
1203         }
1204
1205         if ((rc == -EIO) || (rc == -EEXIST)) {
1206                 int oplock = FALSE;
1207                 __u16 netfid;
1208
1209                 /* BB FIXME Is Generic Read correct for rename? */
1210                 /* if renaming directory - we should not say CREATE_NOT_DIR,
1211                    need to test renaming open directory, also GENERIC_READ
1212                    might not right be right access to request */
1213                 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
1214                                  CREATE_NOT_DIR, &netfid, &oplock, NULL,
1215                                  cifs_sb_source->local_nls,
1216                                  cifs_sb_source->mnt_cifs_flags &
1217                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
1218                 if (rc == 0) {
1219                         rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
1220                                               cifs_sb_source->local_nls,
1221                                               cifs_sb_source->mnt_cifs_flags &
1222                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1223                         CIFSSMBClose(xid, pTcon, netfid);
1224                 }
1225         }
1226
1227 cifs_rename_exit:
1228         kfree(fromName);
1229         kfree(toName);
1230         FreeXid(xid);
1231         return rc;
1232 }
1233
1234 int cifs_revalidate(struct dentry *direntry)
1235 {
1236         int xid;
1237         int rc = 0;
1238         char *full_path;
1239         struct cifs_sb_info *cifs_sb;
1240         struct cifsInodeInfo *cifsInode;
1241         loff_t local_size;
1242         struct timespec local_mtime;
1243         int invalidate_inode = FALSE;
1244
1245         if (direntry->d_inode == NULL)
1246                 return -ENOENT;
1247
1248         cifsInode = CIFS_I(direntry->d_inode);
1249
1250         if (cifsInode == NULL)
1251                 return -ENOENT;
1252
1253         /* no sense revalidating inode info on file that no one can write */
1254         if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
1255                 return rc;
1256
1257         xid = GetXid();
1258
1259         cifs_sb = CIFS_SB(direntry->d_sb);
1260
1261         /* can not safely grab the rename sem here if rename calls revalidate
1262            since that would deadlock */
1263         full_path = build_path_from_dentry(direntry);
1264         if (full_path == NULL) {
1265                 FreeXid(xid);
1266                 return -ENOMEM;
1267         }
1268         cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1269                  "jiffies %ld", full_path, direntry->d_inode,
1270                  direntry->d_inode->i_count.counter, direntry,
1271                  direntry->d_time, jiffies));
1272
1273         if (cifsInode->time == 0) {
1274                 /* was set to zero previously to force revalidate */
1275         } else if (time_before(jiffies, cifsInode->time + HZ) &&
1276                    lookupCacheEnabled) {
1277                 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1278                     (direntry->d_inode->i_nlink == 1)) {
1279                         kfree(full_path);
1280                         FreeXid(xid);
1281                         return rc;
1282                 } else {
1283                         cFYI(1, ("Have to revalidate file due to hardlinks"));
1284                 }
1285         }
1286
1287         /* save mtime and size */
1288         local_mtime = direntry->d_inode->i_mtime;
1289         local_size = direntry->d_inode->i_size;
1290
1291         if (cifs_sb->tcon->unix_ext) {
1292                 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1293                                               direntry->d_sb, xid);
1294                 if (rc) {
1295                         cFYI(1, ("error on getting revalidate info %d", rc));
1296 /*                      if (rc != -ENOENT)
1297                                 rc = 0; */      /* BB should we cache info on
1298                                                    certain errors? */
1299                 }
1300         } else {
1301                 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1302                                          direntry->d_sb, xid);
1303                 if (rc) {
1304                         cFYI(1, ("error on getting revalidate info %d", rc));
1305 /*                      if (rc != -ENOENT)
1306                                 rc = 0; */      /* BB should we cache info on
1307                                                    certain errors? */
1308                 }
1309         }
1310         /* should we remap certain errors, access denied?, to zero */
1311
1312         /* if not oplocked, we invalidate inode pages if mtime or file size
1313            had changed on server */
1314
1315         if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) &&
1316             (local_size == direntry->d_inode->i_size)) {
1317                 cFYI(1, ("cifs_revalidate - inode unchanged"));
1318         } else {
1319                 /* file may have changed on server */
1320                 if (cifsInode->clientCanCacheRead) {
1321                         /* no need to invalidate inode pages since we were the
1322                            only ones who could have modified the file and the
1323                            server copy is staler than ours */
1324                 } else {
1325                         invalidate_inode = TRUE;
1326                 }
1327         }
1328
1329         /* can not grab this sem since kernel filesys locking documentation
1330            indicates i_mutex may be taken by the kernel on lookup and rename
1331            which could deadlock if we grab the i_mutex here as well */
1332 /*      mutex_lock(&direntry->d_inode->i_mutex);*/
1333         /* need to write out dirty pages here  */
1334         if (direntry->d_inode->i_mapping) {
1335                 /* do we need to lock inode until after invalidate completes
1336                    below? */
1337                 filemap_fdatawrite(direntry->d_inode->i_mapping);
1338         }
1339         if (invalidate_inode) {
1340         /* shrink_dcache not necessary now that cifs dentry ops
1341         are exported for negative dentries */
1342 /*              if (S_ISDIR(direntry->d_inode->i_mode))
1343                         shrink_dcache_parent(direntry); */
1344                 if (S_ISREG(direntry->d_inode->i_mode)) {
1345                         if (direntry->d_inode->i_mapping)
1346                                 filemap_fdatawait(direntry->d_inode->i_mapping);
1347                         /* may eventually have to do this for open files too */
1348                         if (list_empty(&(cifsInode->openFileList))) {
1349                                 /* changed on server - flush read ahead pages */
1350                                 cFYI(1, ("Invalidating read ahead data on "
1351                                          "closed file"));
1352                                 invalidate_remote_inode(direntry->d_inode);
1353                         }
1354                 }
1355         }
1356 /*      mutex_unlock(&direntry->d_inode->i_mutex); */
1357
1358         kfree(full_path);
1359         FreeXid(xid);
1360         return rc;
1361 }
1362
1363 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1364         struct kstat *stat)
1365 {
1366         int err = cifs_revalidate(dentry);
1367         if (!err) {
1368                 generic_fillattr(dentry->d_inode, stat);
1369                 stat->blksize = CIFS_MAX_MSGSIZE;
1370         }
1371         return err;
1372 }
1373
1374 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1375 {
1376         pgoff_t index = from >> PAGE_CACHE_SHIFT;
1377         unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1378         struct page *page;
1379         int rc = 0;
1380
1381         page = grab_cache_page(mapping, index);
1382         if (!page)
1383                 return -ENOMEM;
1384
1385         zero_user_page(page, offset, PAGE_CACHE_SIZE - offset, KM_USER0);
1386         unlock_page(page);
1387         page_cache_release(page);
1388         return rc;
1389 }
1390
1391 static int cifs_vmtruncate(struct inode *inode, loff_t offset)
1392 {
1393         struct address_space *mapping = inode->i_mapping;
1394         unsigned long limit;
1395
1396         spin_lock(&inode->i_lock);
1397         if (inode->i_size < offset)
1398                 goto do_expand;
1399         /*
1400          * truncation of in-use swapfiles is disallowed - it would cause
1401          * subsequent swapout to scribble on the now-freed blocks.
1402          */
1403         if (IS_SWAPFILE(inode)) {
1404                 spin_unlock(&inode->i_lock);
1405                 goto out_busy;
1406         }
1407         i_size_write(inode, offset);
1408         spin_unlock(&inode->i_lock);
1409         /*
1410          * unmap_mapping_range is called twice, first simply for efficiency
1411          * so that truncate_inode_pages does fewer single-page unmaps. However
1412          * after this first call, and before truncate_inode_pages finishes,
1413          * it is possible for private pages to be COWed, which remain after
1414          * truncate_inode_pages finishes, hence the second unmap_mapping_range
1415          * call must be made for correctness.
1416          */
1417         unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1418         truncate_inode_pages(mapping, offset);
1419         unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1420         goto out_truncate;
1421
1422 do_expand:
1423         limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
1424         if (limit != RLIM_INFINITY && offset > limit) {
1425                 spin_unlock(&inode->i_lock);
1426                 goto out_sig;
1427         }
1428         if (offset > inode->i_sb->s_maxbytes) {
1429                 spin_unlock(&inode->i_lock);
1430                 goto out_big;
1431         }
1432         i_size_write(inode, offset);
1433         spin_unlock(&inode->i_lock);
1434 out_truncate:
1435         if (inode->i_op && inode->i_op->truncate)
1436                 inode->i_op->truncate(inode);
1437         return 0;
1438 out_sig:
1439         send_sig(SIGXFSZ, current, 0);
1440 out_big:
1441         return -EFBIG;
1442 out_busy:
1443         return -ETXTBSY;
1444 }
1445
1446 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1447 {
1448         int xid;
1449         struct cifs_sb_info *cifs_sb;
1450         struct cifsTconInfo *pTcon;
1451         char *full_path = NULL;
1452         int rc = -EACCES;
1453         struct cifsFileInfo *open_file = NULL;
1454         FILE_BASIC_INFO time_buf;
1455         int set_time = FALSE;
1456         int set_dosattr = FALSE;
1457         __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1458         __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1459         __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1460         struct cifsInodeInfo *cifsInode;
1461
1462         xid = GetXid();
1463
1464         cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1465                  direntry->d_name.name, attrs->ia_valid));
1466
1467         cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
1468         pTcon = cifs_sb->tcon;
1469
1470         if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1471                 /* check if we have permission to change attrs */
1472                 rc = inode_change_ok(direntry->d_inode, attrs);
1473                 if (rc < 0) {
1474                         FreeXid(xid);
1475                         return rc;
1476                 } else
1477                         rc = 0;
1478         }
1479
1480         full_path = build_path_from_dentry(direntry);
1481         if (full_path == NULL) {
1482                 FreeXid(xid);
1483                 return -ENOMEM;
1484         }
1485         cifsInode = CIFS_I(direntry->d_inode);
1486
1487         /* BB check if we need to refresh inode from server now ? BB */
1488
1489         /* need to flush data before changing file size on server */
1490         filemap_write_and_wait(direntry->d_inode->i_mapping);
1491
1492         if (attrs->ia_valid & ATTR_SIZE) {
1493                 /* To avoid spurious oplock breaks from server, in the case of
1494                    inodes that we already have open, avoid doing path based
1495                    setting of file size if we can do it by handle.
1496                    This keeps our caching token (oplock) and avoids timeouts
1497                    when the local oplock break takes longer to flush
1498                    writebehind data than the SMB timeout for the SetPathInfo
1499                    request would allow */
1500
1501                 open_file = find_writable_file(cifsInode);
1502                 if (open_file) {
1503                         __u16 nfid = open_file->netfid;
1504                         __u32 npid = open_file->pid;
1505                         rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1506                                                 nfid, npid, FALSE);
1507                         atomic_dec(&open_file->wrtPending);
1508                         cFYI(1, ("SetFSize for attrs rc = %d", rc));
1509                         if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1510                                 unsigned int bytes_written;
1511                                 rc = CIFSSMBWrite(xid, pTcon,
1512                                                   nfid, 0, attrs->ia_size,
1513                                                   &bytes_written, NULL, NULL,
1514                                                   1 /* 45 seconds */);
1515                                 cFYI(1, ("Wrt seteof rc %d", rc));
1516                         }
1517                 } else
1518                         rc = -EINVAL;
1519
1520                 if (rc != 0) {
1521                         /* Set file size by pathname rather than by handle
1522                            either because no valid, writeable file handle for
1523                            it was found or because there was an error setting
1524                            it by handle */
1525                         rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1526                                            attrs->ia_size, FALSE,
1527                                            cifs_sb->local_nls,
1528                                            cifs_sb->mnt_cifs_flags &
1529                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1530                         cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1531                         if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1532                                 __u16 netfid;
1533                                 int oplock = FALSE;
1534
1535                                 rc = SMBLegacyOpen(xid, pTcon, full_path,
1536                                         FILE_OPEN,
1537                                         SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1538                                         CREATE_NOT_DIR, &netfid, &oplock,
1539                                         NULL, cifs_sb->local_nls,
1540                                         cifs_sb->mnt_cifs_flags &
1541                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1542                                 if (rc == 0) {
1543                                         unsigned int bytes_written;
1544                                         rc = CIFSSMBWrite(xid, pTcon,
1545                                                         netfid, 0,
1546                                                         attrs->ia_size,
1547                                                         &bytes_written, NULL,
1548                                                         NULL, 1 /* 45 sec */);
1549                                         cFYI(1, ("wrt seteof rc %d", rc));
1550                                         CIFSSMBClose(xid, pTcon, netfid);
1551                                 }
1552
1553                         }
1554                 }
1555
1556                 /* Server is ok setting allocation size implicitly - no need
1557                    to call:
1558                 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1559                          cifs_sb->local_nls);
1560                    */
1561
1562                 if (rc == 0) {
1563                         rc = cifs_vmtruncate(direntry->d_inode, attrs->ia_size);
1564                         cifs_truncate_page(direntry->d_inode->i_mapping,
1565                                            direntry->d_inode->i_size);
1566                 } else
1567                         goto cifs_setattr_exit;
1568         }
1569         if (attrs->ia_valid & ATTR_UID) {
1570                 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1571                 uid = attrs->ia_uid;
1572         }
1573         if (attrs->ia_valid & ATTR_GID) {
1574                 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1575                 gid = attrs->ia_gid;
1576         }
1577
1578         time_buf.Attributes = 0;
1579
1580         /* skip mode change if it's just for clearing setuid/setgid */
1581         if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1582                 attrs->ia_valid &= ~ATTR_MODE;
1583
1584         if (attrs->ia_valid & ATTR_MODE) {
1585                 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1586                 mode = attrs->ia_mode;
1587         }
1588
1589         if ((pTcon->unix_ext)
1590             && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1591                 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
1592                                          0 /* dev_t */, cifs_sb->local_nls,
1593                                          cifs_sb->mnt_cifs_flags &
1594                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1595         else if (attrs->ia_valid & ATTR_MODE) {
1596                 rc = 0;
1597                 if ((mode & S_IWUGO) == 0) /* not writeable */ {
1598                         if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
1599                                 set_dosattr = TRUE;
1600                                 time_buf.Attributes =
1601                                         cpu_to_le32(cifsInode->cifsAttrs |
1602                                                     ATTR_READONLY);
1603                         }
1604                 } else if (cifsInode->cifsAttrs & ATTR_READONLY) {
1605                         /* If file is readonly on server, we would
1606                         not be able to write to it - so if any write
1607                         bit is enabled for user or group or other we
1608                         need to at least try to remove r/o dos attr */
1609                         set_dosattr = TRUE;
1610                         time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs &
1611                                             (~ATTR_READONLY));
1612                         /* Windows ignores set to zero */
1613                         if (time_buf.Attributes == 0)
1614                                 time_buf.Attributes |= cpu_to_le32(ATTR_NORMAL);
1615                 }
1616                 /* BB to be implemented -
1617                    via Windows security descriptors or streams */
1618                 /* CIFSSMBWinSetPerms(xid, pTcon, full_path, mode, uid, gid,
1619                                       cifs_sb->local_nls); */
1620         }
1621
1622         if (attrs->ia_valid & ATTR_ATIME) {
1623                 set_time = TRUE;
1624                 time_buf.LastAccessTime =
1625                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1626         } else
1627                 time_buf.LastAccessTime = 0;
1628
1629         if (attrs->ia_valid & ATTR_MTIME) {
1630                 set_time = TRUE;
1631                 time_buf.LastWriteTime =
1632                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1633         } else
1634                 time_buf.LastWriteTime = 0;
1635         /* Do not set ctime explicitly unless other time
1636            stamps are changed explicitly (i.e. by utime()
1637            since we would then have a mix of client and
1638            server times */
1639
1640         if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1641                 set_time = TRUE;
1642                 /* Although Samba throws this field away
1643                 it may be useful to Windows - but we do
1644                 not want to set ctime unless some other
1645                 timestamp is changing */
1646                 cFYI(1, ("CIFS - CTIME changed"));
1647                 time_buf.ChangeTime =
1648                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1649         } else
1650                 time_buf.ChangeTime = 0;
1651
1652         if (set_time || set_dosattr) {
1653                 time_buf.CreationTime = 0;      /* do not change */
1654                 /* In the future we should experiment - try setting timestamps
1655                    via Handle (SetFileInfo) instead of by path */
1656                 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1657                         rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
1658                                              cifs_sb->local_nls,
1659                                              cifs_sb->mnt_cifs_flags &
1660                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1661                 else
1662                         rc = -EOPNOTSUPP;
1663
1664                 if (rc == -EOPNOTSUPP) {
1665                         int oplock = FALSE;
1666                         __u16 netfid;
1667
1668                         cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1669                                  "times not supported by this server"));
1670                         /* BB we could scan to see if we already have it open
1671                            and pass in pid of opener to function */
1672                         rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1673                                          SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1674                                          CREATE_NOT_DIR, &netfid, &oplock,
1675                                          NULL, cifs_sb->local_nls,
1676                                          cifs_sb->mnt_cifs_flags &
1677                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1678                         if (rc == 0) {
1679                                 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1680                                                          netfid);
1681                                 CIFSSMBClose(xid, pTcon, netfid);
1682                         } else {
1683                         /* BB For even older servers we could convert time_buf
1684                            into old DOS style which uses two second
1685                            granularity */
1686
1687                         /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1688                                         &time_buf, cifs_sb->local_nls); */
1689                         }
1690                 }
1691                 /* Even if error on time set, no sense failing the call if
1692                 the server would set the time to a reasonable value anyway,
1693                 and this check ensures that we are not being called from
1694                 sys_utimes in which case we ought to fail the call back to
1695                 the user when the server rejects the call */
1696                 if ((rc) && (attrs->ia_valid &
1697                          (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1698                         rc = 0;
1699         }
1700
1701         /* do not need local check to inode_check_ok since the server does
1702            that */
1703         if (!rc)
1704                 rc = inode_setattr(direntry->d_inode, attrs);
1705 cifs_setattr_exit:
1706         kfree(full_path);
1707         FreeXid(xid);
1708         return rc;
1709 }
1710
1711 #if 0
1712 void cifs_delete_inode(struct inode *inode)
1713 {
1714         cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1715         /* may have to add back in if and when safe distributed caching of
1716            directories added e.g. via FindNotify */
1717 }
1718 #endif