4 * Copyright (C) International Business Machines Corp., 2002,2005
5 * Author(s): Steve French (sfrench@us.ibm.com)
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.
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.
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
22 #include <linux/buffer_head.h>
23 #include <linux/stat.h>
24 #include <linux/pagemap.h>
25 #include <asm/div64.h>
29 #include "cifsproto.h"
30 #include "cifs_debug.h"
31 #include "cifs_fs_sb.h"
33 int cifs_get_inode_info_unix(struct inode **pinode,
34 const unsigned char *search_path, struct super_block *sb, int xid)
37 FILE_UNIX_BASIC_INFO findData;
38 struct cifsTconInfo *pTcon;
40 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
43 pTcon = cifs_sb->tcon;
44 cFYI(1, (" Getting info on %s ", search_path));
45 /* could have done a find first instead but this returns more info */
46 rc = CIFSSMBUnixQPathInfo(xid, pTcon, search_path, &findData,
47 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
48 CIFS_MOUNT_MAP_SPECIAL_CHR);
49 /* dump_mem("\nUnixQPathInfo return data", &findData,
54 kmalloc(strnlen(pTcon->treeName,
56 strnlen(search_path, MAX_PATHCONF) + 1,
58 if (tmp_path == NULL) {
61 /* have to skip first of the double backslash of
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,
68 cifs_sb->mnt_cifs_flags &
69 CIFS_MOUNT_MAP_SPECIAL_CHR);
72 /* BB fix up inode etc. */
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);
83 if (*pinode == NULL) {
84 *pinode = new_inode(sb);
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? */
90 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
92 (unsigned long)findData.UniqueId;
93 } /* note ino incremented to unique num in new_inode */
94 insert_inode_hash(*pinode);
98 cifsInfo = CIFS_I(inode);
100 cFYI(1, ("Old time %ld ", cifsInfo->time));
101 cifsInfo->time = jiffies;
102 cFYI(1, ("New time %ld ", cifsInfo->time));
103 /* this is ok to set on every inode revalidate */
104 atomic_set(&cifsInfo->inUse,1);
107 cifs_NTtimeToUnix(le64_to_cpu(findData.LastAccessTime));
109 cifs_NTtimeToUnix(le64_to_cpu
110 (findData.LastModificationTime));
112 cifs_NTtimeToUnix(le64_to_cpu(findData.LastStatusChange));
113 inode->i_mode = le64_to_cpu(findData.Permissions);
114 if (type == UNIX_FILE) {
115 inode->i_mode |= S_IFREG;
116 } else if (type == UNIX_SYMLINK) {
117 inode->i_mode |= S_IFLNK;
118 } else if (type == UNIX_DIR) {
119 inode->i_mode |= S_IFDIR;
120 } else if (type == UNIX_CHARDEV) {
121 inode->i_mode |= S_IFCHR;
122 inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
123 le64_to_cpu(findData.DevMinor) & MINORMASK);
124 } else if (type == UNIX_BLOCKDEV) {
125 inode->i_mode |= S_IFBLK;
126 inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
127 le64_to_cpu(findData.DevMinor) & MINORMASK);
128 } else if (type == UNIX_FIFO) {
129 inode->i_mode |= S_IFIFO;
130 } else if (type == UNIX_SOCKET) {
131 inode->i_mode |= S_IFSOCK;
133 inode->i_uid = le64_to_cpu(findData.Uid);
134 inode->i_gid = le64_to_cpu(findData.Gid);
135 inode->i_nlink = le64_to_cpu(findData.Nlinks);
137 if (is_size_safe_to_change(cifsInfo)) {
138 /* can not safely change the file size here if the
139 client is writing to it due to potential races */
141 i_size_write(inode, end_of_file);
143 /* blksize needs to be multiple of two. So safer to default to
144 blksize and blkbits set in superblock so 2**blkbits and blksize
145 will match rather than setting to:
146 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
148 /* This seems incredibly stupid but it turns out that i_blocks
149 is not related to (i_size / i_blksize), instead 512 byte size
150 is required for calculating num blocks */
152 /* 512 bytes (2**9) is the fake blocksize that must be used */
153 /* for this calculation */
154 inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
157 if (num_of_bytes < end_of_file)
158 cFYI(1, ("allocation size less than end of file"));
160 ("Size %ld and blocks %ld",
161 (unsigned long) inode->i_size, inode->i_blocks));
162 if (S_ISREG(inode->i_mode)) {
163 cFYI(1, ("File inode"));
164 inode->i_op = &cifs_file_inode_ops;
165 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
166 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
168 &cifs_file_direct_nobrl_ops;
170 inode->i_fop = &cifs_file_direct_ops;
171 } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
172 inode->i_fop = &cifs_file_nobrl_ops;
173 else /* not direct, send byte range locks */
174 inode->i_fop = &cifs_file_ops;
176 inode->i_data.a_ops = &cifs_addr_ops;
177 /* check if server can support readpages */
178 if(pTcon->ses->server->maxBuf <
179 4096 + MAX_CIFS_HDR_SIZE)
180 inode->i_data.a_ops->readpages = NULL;
181 } else if (S_ISDIR(inode->i_mode)) {
182 cFYI(1, ("Directory inode"));
183 inode->i_op = &cifs_dir_inode_ops;
184 inode->i_fop = &cifs_dir_ops;
185 } else if (S_ISLNK(inode->i_mode)) {
186 cFYI(1, ("Symbolic Link inode"));
187 inode->i_op = &cifs_symlink_inode_ops;
188 /* tmp_inode->i_fop = */ /* do not need to set to anything */
190 cFYI(1, ("Init special inode"));
191 init_special_inode(inode, inode->i_mode,
198 static int decode_sfu_inode(struct inode * inode, __u64 size,
199 const unsigned char *path,
200 struct cifs_sb_info *cifs_sb, int xid)
205 struct cifsTconInfo *pTcon = cifs_sb->tcon;
207 unsigned int bytes_read;
213 inode->i_mode |= S_IFIFO;
215 } else if (size < 8) {
216 return -EINVAL; /* EOPNOTSUPP? */
219 rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ,
220 CREATE_NOT_DIR, &netfid, &oplock, NULL,
222 cifs_sb->mnt_cifs_flags &
223 CIFS_MOUNT_MAP_SPECIAL_CHR);
226 rc = CIFSSMBRead(xid, pTcon,
228 8 /* length */, 0 /* offset */,
230 if((rc == 0) && (bytes_read == 8)) {
231 /* if memcmp(IntxCHR\000, pbuf, 8)
232 else if memcmp(IntxBLK\000, pbuf, 8)
233 else if memcmp(IntxLNK\001, pbuf, 8) */
236 CIFSSMBClose(xid, pTcon, netfid);
239 /* inode->i_rdev = MKDEV(le64_to_cpu(DevMajor),
240 le64_to_cpu(DevMinor) & MINORMASK);*/
241 /* inode->i_mode |= S_IFBLK; */
247 int cifs_get_inode_info(struct inode **pinode,
248 const unsigned char *search_path, FILE_ALL_INFO *pfindData,
249 struct super_block *sb, int xid)
252 struct cifsTconInfo *pTcon;
254 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
258 pTcon = cifs_sb->tcon;
259 cFYI(1,("Getting info on %s", search_path));
261 if ((pfindData == NULL) && (*pinode != NULL)) {
262 if (CIFS_I(*pinode)->clientCanCacheRead) {
263 cFYI(1,("No need to revalidate cached inode sizes"));
268 /* if file info not passed in then get it from server */
269 if (pfindData == NULL) {
270 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
273 pfindData = (FILE_ALL_INFO *)buf;
274 /* could do find first instead but this returns more info */
275 rc = CIFSSMBQPathInfo(xid, pTcon, search_path, pfindData,
276 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
277 CIFS_MOUNT_MAP_SPECIAL_CHR);
278 /* BB optimize code so we do not make the above call
279 when server claims no NT SMB support and the above call
280 failed at least once - set flag in tcon or mount */
281 if((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
282 rc = SMBQueryInformation(xid, pTcon, search_path,
283 pfindData, cifs_sb->local_nls,
284 cifs_sb->mnt_cifs_flags &
285 CIFS_MOUNT_MAP_SPECIAL_CHR);
289 /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
291 if (rc == -EREMOTE) {
296 strnlen(search_path, MAX_PATHCONF) + 1,
298 if (tmp_path == NULL) {
303 strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
304 strncat(tmp_path, search_path, MAX_PATHCONF);
305 rc = connect_to_dfs_path(xid, pTcon->ses,
306 /* treename + */ tmp_path,
308 cifs_sb->mnt_cifs_flags &
309 CIFS_MOUNT_MAP_SPECIAL_CHR);
311 /* BB fix up inode etc. */
317 struct cifsInodeInfo *cifsInfo;
318 __u32 attr = le32_to_cpu(pfindData->Attributes);
321 if (*pinode == NULL) {
322 *pinode = new_inode(sb);
325 /* Is an i_ino of zero legal? Can we use that to check
326 if the server supports returning inode numbers? Are
327 there other sanity checks we can use to ensure that
328 the server is really filling in that field? */
330 /* We can not use the IndexNumber field by default from
331 Windows or Samba (in ALL_INFO buf) but we can request
332 it explicitly. It may not be unique presumably if
333 the server has multiple devices mounted under one
336 /* There may be higher info levels that work but are
337 there Windows server or network appliances for which
338 IndexNumber field is not guaranteed unique? */
340 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM){
344 rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
345 search_path, &inode_num,
347 cifs_sb->mnt_cifs_flags &
348 CIFS_MOUNT_MAP_SPECIAL_CHR);
350 cFYI(1,("GetSrvInodeNum rc %d", rc1));
351 /* BB EOPNOSUPP disable SERVER_INUM? */
352 } else /* do we need cast or hash to ino? */
353 (*pinode)->i_ino = inode_num;
354 } /* else ino incremented to unique num in new_inode*/
355 insert_inode_hash(*pinode);
358 cifsInfo = CIFS_I(inode);
359 cifsInfo->cifsAttrs = attr;
360 cFYI(1, (" Old time %ld ", cifsInfo->time));
361 cifsInfo->time = jiffies;
362 cFYI(1, (" New time %ld ", cifsInfo->time));
364 /* blksize needs to be multiple of two. So safer to default to
365 blksize and blkbits set in superblock so 2**blkbits and blksize
366 will match rather than setting to:
367 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
369 /* Linux can not store file creation time unfortunately so we ignore it */
371 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
373 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
375 cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
376 cFYI(0, (" Attributes came in as 0x%x ", attr));
378 /* set default mode. will override for dirs below */
379 if (atomic_read(&cifsInfo->inUse) == 0)
380 /* new inode, can safely set these fields */
381 inode->i_mode = cifs_sb->mnt_file_mode;
383 /* if (attr & ATTR_REPARSE) */
384 /* We no longer handle these as symlinks because we could not
385 follow them due to the absolute path with drive letter */
386 if (attr & ATTR_DIRECTORY) {
387 /* override default perms since we do not do byte range locking
389 inode->i_mode = cifs_sb->mnt_dir_mode;
390 inode->i_mode |= S_IFDIR;
391 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
392 (cifsInfo->cifsAttrs & ATTR_SYSTEM) &&
393 /* No need to le64 convert size of zero */
394 (pfindData->EndOfFile == 0)) {
395 inode->i_mode = cifs_sb->mnt_file_mode;
396 inode->i_mode |= S_IFIFO;
397 /* BB Finish for SFU style symlinks and devices */
398 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
399 (cifsInfo->cifsAttrs & ATTR_SYSTEM)) {
400 if (decode_sfu_inode(inode,
401 le64_to_cpu(pfindData->EndOfFile),
404 cFYI(1,("Unrecognized sfu inode type"));
407 inode->i_mode |= S_IFREG;
408 /* treat the dos attribute of read-only as read-only
410 if (cifsInfo->cifsAttrs & ATTR_READONLY)
411 inode->i_mode &= ~(S_IWUGO);
412 /* BB add code here -
413 validate if device or weird share or device type? */
415 if (is_size_safe_to_change(cifsInfo)) {
416 /* can not safely change the file size here if the
417 client is writing to it due to potential races */
418 i_size_write(inode,le64_to_cpu(pfindData->EndOfFile));
420 /* 512 bytes (2**9) is the fake blocksize that must be
421 used for this calculation */
422 inode->i_blocks = (512 - 1 + le64_to_cpu(
423 pfindData->AllocationSize)) >> 9;
426 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
428 /* BB fill in uid and gid here? with help from winbind?
429 or retrieve from NTFS stream extended attribute */
430 if (atomic_read(&cifsInfo->inUse) == 0) {
431 inode->i_uid = cifs_sb->mnt_uid;
432 inode->i_gid = cifs_sb->mnt_gid;
433 /* set so we do not keep refreshing these fields with
434 bad data after user has changed them in memory */
435 atomic_set(&cifsInfo->inUse,1);
438 if (S_ISREG(inode->i_mode)) {
439 cFYI(1, ("File inode"));
440 inode->i_op = &cifs_file_inode_ops;
441 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
442 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
444 &cifs_file_direct_nobrl_ops;
446 inode->i_fop = &cifs_file_direct_ops;
447 } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
448 inode->i_fop = &cifs_file_nobrl_ops;
449 else /* not direct, send byte range locks */
450 inode->i_fop = &cifs_file_ops;
452 inode->i_data.a_ops = &cifs_addr_ops;
453 if(pTcon->ses->server->maxBuf <
454 4096 + MAX_CIFS_HDR_SIZE)
455 inode->i_data.a_ops->readpages = NULL;
456 } else if (S_ISDIR(inode->i_mode)) {
457 cFYI(1, ("Directory inode"));
458 inode->i_op = &cifs_dir_inode_ops;
459 inode->i_fop = &cifs_dir_ops;
460 } else if (S_ISLNK(inode->i_mode)) {
461 cFYI(1, ("Symbolic Link inode"));
462 inode->i_op = &cifs_symlink_inode_ops;
464 init_special_inode(inode, inode->i_mode,
472 /* gets root inode */
473 void cifs_read_inode(struct inode *inode)
476 struct cifs_sb_info *cifs_sb;
478 cifs_sb = CIFS_SB(inode->i_sb);
480 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
481 cifs_get_inode_info_unix(&inode, "", inode->i_sb,xid);
483 cifs_get_inode_info(&inode, "", NULL, inode->i_sb,xid);
484 /* can not call macro FreeXid here since in a void func */
488 int cifs_unlink(struct inode *inode, struct dentry *direntry)
492 struct cifs_sb_info *cifs_sb;
493 struct cifsTconInfo *pTcon;
494 char *full_path = NULL;
495 struct cifsInodeInfo *cifsInode;
496 FILE_BASIC_INFO *pinfo_buf;
498 cFYI(1, (" cifs_unlink, inode = 0x%p with ", inode));
502 cifs_sb = CIFS_SB(inode->i_sb);
503 pTcon = cifs_sb->tcon;
505 /* Unlink can be called from rename so we can not grab the sem here
506 since we deadlock otherwise */
507 /* down(&direntry->d_sb->s_vfs_rename_sem);*/
508 full_path = build_path_from_dentry(direntry);
509 /* up(&direntry->d_sb->s_vfs_rename_sem);*/
510 if (full_path == NULL) {
514 rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
515 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
518 if (direntry->d_inode)
519 direntry->d_inode->i_nlink--;
520 } else if (rc == -ENOENT) {
522 } else if (rc == -ETXTBSY) {
526 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
527 CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
528 &netfid, &oplock, NULL, cifs_sb->local_nls,
529 cifs_sb->mnt_cifs_flags &
530 CIFS_MOUNT_MAP_SPECIAL_CHR);
532 CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
534 cifs_sb->mnt_cifs_flags &
535 CIFS_MOUNT_MAP_SPECIAL_CHR);
536 CIFSSMBClose(xid, pTcon, netfid);
537 if (direntry->d_inode)
538 direntry->d_inode->i_nlink--;
540 } else if (rc == -EACCES) {
541 /* try only if r/o attribute set in local lookup data? */
542 pinfo_buf = kmalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
544 memset(pinfo_buf, 0, sizeof(FILE_BASIC_INFO));
545 /* ATTRS set to normal clears r/o bit */
546 pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
547 if (!(pTcon->ses->flags & CIFS_SES_NT4))
548 rc = CIFSSMBSetTimes(xid, pTcon, full_path,
551 cifs_sb->mnt_cifs_flags &
552 CIFS_MOUNT_MAP_SPECIAL_CHR);
556 if (rc == -EOPNOTSUPP) {
559 /* rc = CIFSSMBSetAttrLegacy(xid, pTcon,
563 For some strange reason it seems that NT4 eats the
564 old setattr call without actually setting the
565 attributes so on to the third attempted workaround
568 /* BB could scan to see if we already have it open
569 and pass in pid of opener to function */
570 rc = CIFSSMBOpen(xid, pTcon, full_path,
571 FILE_OPEN, SYNCHRONIZE |
572 FILE_WRITE_ATTRIBUTES, 0,
573 &netfid, &oplock, NULL,
575 cifs_sb->mnt_cifs_flags &
576 CIFS_MOUNT_MAP_SPECIAL_CHR);
578 rc = CIFSSMBSetFileTimes(xid, pTcon,
581 CIFSSMBClose(xid, pTcon, netfid);
587 rc = CIFSSMBDelFile(xid, pTcon, full_path,
589 cifs_sb->mnt_cifs_flags &
590 CIFS_MOUNT_MAP_SPECIAL_CHR);
592 if (direntry->d_inode)
593 direntry->d_inode->i_nlink--;
594 } else if (rc == -ETXTBSY) {
598 rc = CIFSSMBOpen(xid, pTcon, full_path,
601 CREATE_DELETE_ON_CLOSE,
602 &netfid, &oplock, NULL,
604 cifs_sb->mnt_cifs_flags &
605 CIFS_MOUNT_MAP_SPECIAL_CHR);
607 CIFSSMBRenameOpenFile(xid, pTcon,
610 cifs_sb->mnt_cifs_flags &
611 CIFS_MOUNT_MAP_SPECIAL_CHR);
612 CIFSSMBClose(xid, pTcon, netfid);
613 if (direntry->d_inode)
614 direntry->d_inode->i_nlink--;
616 /* BB if rc = -ETXTBUSY goto the rename logic BB */
620 if (direntry->d_inode) {
621 cifsInode = CIFS_I(direntry->d_inode);
622 cifsInode->time = 0; /* will force revalidate to get info
624 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
626 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
627 cifsInode = CIFS_I(inode);
628 cifsInode->time = 0; /* force revalidate of dir as well */
635 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
639 struct cifs_sb_info *cifs_sb;
640 struct cifsTconInfo *pTcon;
641 char *full_path = NULL;
642 struct inode *newinode = NULL;
644 cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p ", mode, inode));
648 cifs_sb = CIFS_SB(inode->i_sb);
649 pTcon = cifs_sb->tcon;
651 down(&inode->i_sb->s_vfs_rename_sem);
652 full_path = build_path_from_dentry(direntry);
653 up(&inode->i_sb->s_vfs_rename_sem);
654 if (full_path == NULL) {
658 /* BB add setting the equivalent of mode via CreateX w/ACLs */
659 rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
660 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
662 cFYI(1, ("cifs_mkdir returned 0x%x ", rc));
666 if (pTcon->ses->capabilities & CAP_UNIX)
667 rc = cifs_get_inode_info_unix(&newinode, full_path,
670 rc = cifs_get_inode_info(&newinode, full_path, NULL,
674 direntry->d_op = &cifs_ci_dentry_ops;
676 direntry->d_op = &cifs_dentry_ops;
677 d_instantiate(direntry, newinode);
678 if (direntry->d_inode)
679 direntry->d_inode->i_nlink = 2;
680 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
681 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
682 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
684 (__u64)current->euid,
685 (__u64)current->egid,
688 cifs_sb->mnt_cifs_flags &
689 CIFS_MOUNT_MAP_SPECIAL_CHR);
691 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
693 (__u64)-1, 0 /* dev_t */,
695 cifs_sb->mnt_cifs_flags &
696 CIFS_MOUNT_MAP_SPECIAL_CHR);
699 /* BB to be implemented via Windows secrty descriptors
700 eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
701 -1, -1, local_nls); */
709 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
713 struct cifs_sb_info *cifs_sb;
714 struct cifsTconInfo *pTcon;
715 char *full_path = NULL;
716 struct cifsInodeInfo *cifsInode;
718 cFYI(1, (" cifs_rmdir, inode = 0x%p with ", inode));
722 cifs_sb = CIFS_SB(inode->i_sb);
723 pTcon = cifs_sb->tcon;
725 down(&inode->i_sb->s_vfs_rename_sem);
726 full_path = build_path_from_dentry(direntry);
727 up(&inode->i_sb->s_vfs_rename_sem);
728 if (full_path == NULL) {
733 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
734 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
738 i_size_write(direntry->d_inode,0);
739 direntry->d_inode->i_nlink = 0;
742 cifsInode = CIFS_I(direntry->d_inode);
743 cifsInode->time = 0; /* force revalidate to go get info when
745 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
746 current_fs_time(inode->i_sb);
753 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
754 struct inode *target_inode, struct dentry *target_direntry)
758 struct cifs_sb_info *cifs_sb_source;
759 struct cifs_sb_info *cifs_sb_target;
760 struct cifsTconInfo *pTcon;
766 cifs_sb_target = CIFS_SB(target_inode->i_sb);
767 cifs_sb_source = CIFS_SB(source_inode->i_sb);
768 pTcon = cifs_sb_source->tcon;
770 if (pTcon != cifs_sb_target->tcon) {
772 return -EXDEV; /* BB actually could be allowed if same server,
774 Might eventually add support for this */
777 /* we already have the rename sem so we do not need to grab it again
778 here to protect the path integrity */
779 fromName = build_path_from_dentry(source_direntry);
780 toName = build_path_from_dentry(target_direntry);
781 if ((fromName == NULL) || (toName == NULL)) {
783 goto cifs_rename_exit;
786 rc = CIFSSMBRename(xid, pTcon, fromName, toName,
787 cifs_sb_source->local_nls,
788 cifs_sb_source->mnt_cifs_flags &
789 CIFS_MOUNT_MAP_SPECIAL_CHR);
791 /* check if they are the same file because rename of hardlinked
793 FILE_UNIX_BASIC_INFO *info_buf_source;
794 FILE_UNIX_BASIC_INFO *info_buf_target;
797 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
798 if (info_buf_source != NULL) {
799 info_buf_target = info_buf_source + 1;
800 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
801 info_buf_source, cifs_sb_source->local_nls,
802 cifs_sb_source->mnt_cifs_flags &
803 CIFS_MOUNT_MAP_SPECIAL_CHR);
805 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
807 cifs_sb_target->local_nls,
808 /* remap based on source sb */
809 cifs_sb_source->mnt_cifs_flags &
810 CIFS_MOUNT_MAP_SPECIAL_CHR);
813 (info_buf_source->UniqueId ==
814 info_buf_target->UniqueId)) {
815 /* do not rename since the files are hardlinked which
818 /* we either can not tell the files are hardlinked
819 (as with Windows servers) or files are not
820 hardlinked so delete the target manually before
821 renaming to follow POSIX rather than Windows
823 cifs_unlink(target_inode, target_direntry);
824 rc = CIFSSMBRename(xid, pTcon, fromName,
826 cifs_sb_source->local_nls,
827 cifs_sb_source->mnt_cifs_flags
828 & CIFS_MOUNT_MAP_SPECIAL_CHR);
830 kfree(info_buf_source);
831 } /* if we can not get memory just leave rc as EEXIST */
835 cFYI(1, ("rename rc %d", rc));
838 if ((rc == -EIO) || (rc == -EEXIST)) {
842 /* BB FIXME Is Generic Read correct for rename? */
843 /* if renaming directory - we should not say CREATE_NOT_DIR,
844 need to test renaming open directory, also GENERIC_READ
845 might not right be right access to request */
846 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
847 CREATE_NOT_DIR, &netfid, &oplock, NULL,
848 cifs_sb_source->local_nls,
849 cifs_sb_source->mnt_cifs_flags &
850 CIFS_MOUNT_MAP_SPECIAL_CHR);
852 CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
853 cifs_sb_source->local_nls,
854 cifs_sb_source->mnt_cifs_flags &
855 CIFS_MOUNT_MAP_SPECIAL_CHR);
856 CIFSSMBClose(xid, pTcon, netfid);
867 int cifs_revalidate(struct dentry *direntry)
872 struct cifs_sb_info *cifs_sb;
873 struct cifsInodeInfo *cifsInode;
875 struct timespec local_mtime;
876 int invalidate_inode = FALSE;
878 if (direntry->d_inode == NULL)
881 cifsInode = CIFS_I(direntry->d_inode);
883 if (cifsInode == NULL)
886 /* no sense revalidating inode info on file that no one can write */
887 if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
892 cifs_sb = CIFS_SB(direntry->d_sb);
894 /* can not safely grab the rename sem here if rename calls revalidate
895 since that would deadlock */
896 full_path = build_path_from_dentry(direntry);
897 if (full_path == NULL) {
901 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
902 "jiffies %ld", full_path, direntry->d_inode,
903 direntry->d_inode->i_count.counter, direntry,
904 direntry->d_time, jiffies));
906 if (cifsInode->time == 0) {
907 /* was set to zero previously to force revalidate */
908 } else if (time_before(jiffies, cifsInode->time + HZ) &&
909 lookupCacheEnabled) {
910 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
911 (direntry->d_inode->i_nlink == 1)) {
916 cFYI(1, ("Have to revalidate file due to hardlinks"));
920 /* save mtime and size */
921 local_mtime = direntry->d_inode->i_mtime;
922 local_size = direntry->d_inode->i_size;
924 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX) {
925 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
928 cFYI(1, ("error on getting revalidate info %d", rc));
929 /* if (rc != -ENOENT)
930 rc = 0; */ /* BB should we cache info on
934 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
937 cFYI(1, ("error on getting revalidate info %d", rc));
938 /* if (rc != -ENOENT)
939 rc = 0; */ /* BB should we cache info on
943 /* should we remap certain errors, access denied?, to zero */
945 /* if not oplocked, we invalidate inode pages if mtime or file size
946 had changed on server */
948 if (timespec_equal(&local_mtime,&direntry->d_inode->i_mtime) &&
949 (local_size == direntry->d_inode->i_size)) {
950 cFYI(1, ("cifs_revalidate - inode unchanged"));
952 /* file may have changed on server */
953 if (cifsInode->clientCanCacheRead) {
954 /* no need to invalidate inode pages since we were the
955 only ones who could have modified the file and the
956 server copy is staler than ours */
958 invalidate_inode = TRUE;
962 /* can not grab this sem since kernel filesys locking documentation
963 indicates i_sem may be taken by the kernel on lookup and rename
964 which could deadlock if we grab the i_sem here as well */
965 /* down(&direntry->d_inode->i_sem);*/
966 /* need to write out dirty pages here */
967 if (direntry->d_inode->i_mapping) {
968 /* do we need to lock inode until after invalidate completes
970 filemap_fdatawrite(direntry->d_inode->i_mapping);
972 if (invalidate_inode) {
973 if (direntry->d_inode->i_mapping)
974 filemap_fdatawait(direntry->d_inode->i_mapping);
975 /* may eventually have to do this for open files too */
976 if (list_empty(&(cifsInode->openFileList))) {
977 /* Has changed on server - flush read ahead pages */
978 cFYI(1, ("Invalidating read ahead data on "
980 invalidate_remote_inode(direntry->d_inode);
983 /* up(&direntry->d_inode->i_sem); */
990 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
993 int err = cifs_revalidate(dentry);
995 generic_fillattr(dentry->d_inode, stat);
999 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1001 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1002 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1007 page = grab_cache_page(mapping, index);
1011 kaddr = kmap_atomic(page, KM_USER0);
1012 memset(kaddr + offset, 0, PAGE_CACHE_SIZE - offset);
1013 flush_dcache_page(page);
1014 kunmap_atomic(kaddr, KM_USER0);
1016 page_cache_release(page);
1020 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1023 struct cifs_sb_info *cifs_sb;
1024 struct cifsTconInfo *pTcon;
1025 char *full_path = NULL;
1027 struct cifsFileInfo *open_file = NULL;
1028 FILE_BASIC_INFO time_buf;
1029 int set_time = FALSE;
1030 __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1031 __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1032 __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1033 struct cifsInodeInfo *cifsInode;
1037 cFYI(1, (" In cifs_setattr, name = %s attrs->iavalid 0x%x ",
1038 direntry->d_name.name, attrs->ia_valid));
1039 cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
1040 pTcon = cifs_sb->tcon;
1042 down(&direntry->d_sb->s_vfs_rename_sem);
1043 full_path = build_path_from_dentry(direntry);
1044 up(&direntry->d_sb->s_vfs_rename_sem);
1045 if (full_path == NULL) {
1049 cifsInode = CIFS_I(direntry->d_inode);
1051 /* BB check if we need to refresh inode from server now ? BB */
1053 /* need to flush data before changing file size on server */
1054 filemap_fdatawrite(direntry->d_inode->i_mapping);
1055 filemap_fdatawait(direntry->d_inode->i_mapping);
1057 if (attrs->ia_valid & ATTR_SIZE) {
1058 /* To avoid spurious oplock breaks from server, in the case of
1059 inodes that we already have open, avoid doing path based
1060 setting of file size if we can do it by handle.
1061 This keeps our caching token (oplock) and avoids timeouts
1062 when the local oplock break takes longer to flush
1063 writebehind data than the SMB timeout for the SetPathInfo
1064 request would allow */
1065 open_file = find_writable_file(cifsInode);
1067 __u16 nfid = open_file->netfid;
1068 __u32 npid = open_file->pid;
1069 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1071 atomic_dec(&open_file->wrtPending);
1072 cFYI(1,("SetFSize for attrs rc = %d", rc));
1075 rc = CIFSSMBWrite(xid, pTcon,
1076 nfid, 0, attrs->ia_size,
1077 &bytes_written, NULL, NULL,
1078 1 /* 45 seconds */);
1079 cFYI(1,("Wrt seteof rc %d", rc));
1083 /* Set file size by pathname rather than by handle
1084 either because no valid, writeable file handle for
1085 it was found or because there was an error setting
1087 rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1088 attrs->ia_size, FALSE,
1090 cifs_sb->mnt_cifs_flags &
1091 CIFS_MOUNT_MAP_SPECIAL_CHR);
1092 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1097 rc = SMBLegacyOpen(xid, pTcon, full_path,
1099 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1100 CREATE_NOT_DIR, &netfid, &oplock,
1101 NULL, cifs_sb->local_nls,
1102 cifs_sb->mnt_cifs_flags &
1103 CIFS_MOUNT_MAP_SPECIAL_CHR);
1106 rc = CIFSSMBWrite(xid, pTcon,
1109 &bytes_written, NULL,
1110 NULL, 1 /* 45 sec */);
1111 cFYI(1,("wrt seteof rc %d",rc));
1112 CIFSSMBClose(xid, pTcon, netfid);
1118 /* Server is ok setting allocation size implicitly - no need
1120 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1121 cifs_sb->local_nls);
1125 rc = vmtruncate(direntry->d_inode, attrs->ia_size);
1126 cifs_truncate_page(direntry->d_inode->i_mapping,
1127 direntry->d_inode->i_size);
1129 goto cifs_setattr_exit;
1131 if (attrs->ia_valid & ATTR_UID) {
1132 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1133 uid = attrs->ia_uid;
1135 if (attrs->ia_valid & ATTR_GID) {
1136 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1137 gid = attrs->ia_gid;
1140 time_buf.Attributes = 0;
1141 if (attrs->ia_valid & ATTR_MODE) {
1142 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1143 mode = attrs->ia_mode;
1146 if ((cifs_sb->tcon->ses->capabilities & CAP_UNIX)
1147 && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1148 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
1149 0 /* dev_t */, cifs_sb->local_nls,
1150 cifs_sb->mnt_cifs_flags &
1151 CIFS_MOUNT_MAP_SPECIAL_CHR);
1152 else if (attrs->ia_valid & ATTR_MODE) {
1153 if ((mode & S_IWUGO) == 0) /* not writeable */ {
1154 if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0)
1155 time_buf.Attributes =
1156 cpu_to_le32(cifsInode->cifsAttrs |
1158 } else if ((mode & S_IWUGO) == S_IWUGO) {
1159 if (cifsInode->cifsAttrs & ATTR_READONLY)
1160 time_buf.Attributes =
1161 cpu_to_le32(cifsInode->cifsAttrs &
1164 /* BB to be implemented -
1165 via Windows security descriptors or streams */
1166 /* CIFSSMBWinSetPerms(xid, pTcon, full_path, mode, uid, gid,
1167 cifs_sb->local_nls); */
1170 if (attrs->ia_valid & ATTR_ATIME) {
1172 time_buf.LastAccessTime =
1173 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1175 time_buf.LastAccessTime = 0;
1177 if (attrs->ia_valid & ATTR_MTIME) {
1179 time_buf.LastWriteTime =
1180 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1182 time_buf.LastWriteTime = 0;
1183 /* Do not set ctime explicitly unless other time
1184 stamps are changed explicitly (i.e. by utime()
1185 since we would then have a mix of client and
1188 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1190 /* Although Samba throws this field away
1191 it may be useful to Windows - but we do
1192 not want to set ctime unless some other
1193 timestamp is changing */
1194 cFYI(1, ("CIFS - CTIME changed "));
1195 time_buf.ChangeTime =
1196 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1198 time_buf.ChangeTime = 0;
1200 if (set_time || time_buf.Attributes) {
1201 time_buf.CreationTime = 0; /* do not change */
1202 /* In the future we should experiment - try setting timestamps
1203 via Handle (SetFileInfo) instead of by path */
1204 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1205 rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
1207 cifs_sb->mnt_cifs_flags &
1208 CIFS_MOUNT_MAP_SPECIAL_CHR);
1212 if (rc == -EOPNOTSUPP) {
1216 cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1217 "times not supported by this server"));
1218 /* BB we could scan to see if we already have it open
1219 and pass in pid of opener to function */
1220 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1221 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1222 CREATE_NOT_DIR, &netfid, &oplock,
1223 NULL, cifs_sb->local_nls,
1224 cifs_sb->mnt_cifs_flags &
1225 CIFS_MOUNT_MAP_SPECIAL_CHR);
1227 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1229 CIFSSMBClose(xid, pTcon, netfid);
1231 /* BB For even older servers we could convert time_buf
1232 into old DOS style which uses two second
1235 /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1236 &time_buf, cifs_sb->local_nls); */
1239 /* Even if error on time set, no sense failing the call if
1240 the server would set the time to a reasonable value anyway,
1241 and this check ensures that we are not being called from
1242 sys_utimes in which case we ought to fail the call back to
1243 the user when the server rejects the call */
1244 if((rc) && (attrs->ia_valid &&
1245 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1249 /* do not need local check to inode_check_ok since the server does
1252 rc = inode_setattr(direntry->d_inode, attrs);
1259 void cifs_delete_inode(struct inode *inode)
1261 cFYI(1, ("In cifs_delete_inode, inode = 0x%p ", inode));
1262 /* may have to add back in if and when safe distributed caching of
1263 directories added e.g. via FindNotify */