4 * Copyright (C) International Business Machines Corp., 2002,2007
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/stat.h>
23 #include <linux/pagemap.h>
24 #include <asm/div64.h>
28 #include "cifsproto.h"
29 #include "cifs_debug.h"
30 #include "cifs_fs_sb.h"
33 static void cifs_set_ops(struct inode *inode, const bool is_dfs_referral)
35 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
37 switch (inode->i_mode & S_IFMT) {
39 inode->i_op = &cifs_file_inode_ops;
40 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
41 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
42 inode->i_fop = &cifs_file_direct_nobrl_ops;
44 inode->i_fop = &cifs_file_direct_ops;
45 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
46 inode->i_fop = &cifs_file_nobrl_ops;
47 else { /* not direct, send byte range locks */
48 inode->i_fop = &cifs_file_ops;
52 /* check if server can support readpages */
53 if (cifs_sb->tcon->ses->server->maxBuf <
54 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
55 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
57 inode->i_data.a_ops = &cifs_addr_ops;
60 if (is_dfs_referral) {
61 inode->i_op = &cifs_dfs_referral_inode_operations;
63 inode->i_op = &cifs_dir_inode_ops;
64 inode->i_fop = &cifs_dir_ops;
68 inode->i_op = &cifs_symlink_inode_ops;
71 init_special_inode(inode, inode->i_mode, inode->i_rdev);
76 static void cifs_unix_info_to_inode(struct inode *inode,
77 FILE_UNIX_BASIC_INFO *info, int force_uid_gid)
79 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
80 struct cifsInodeInfo *cifsInfo = CIFS_I(inode);
81 __u64 num_of_bytes = le64_to_cpu(info->NumOfBytes);
82 __u64 end_of_file = le64_to_cpu(info->EndOfFile);
84 inode->i_atime = cifs_NTtimeToUnix(le64_to_cpu(info->LastAccessTime));
86 cifs_NTtimeToUnix(le64_to_cpu(info->LastModificationTime));
87 inode->i_ctime = cifs_NTtimeToUnix(le64_to_cpu(info->LastStatusChange));
88 inode->i_mode = le64_to_cpu(info->Permissions);
91 * Since we set the inode type below we need to mask off
92 * to avoid strange results if bits set above.
94 inode->i_mode &= ~S_IFMT;
95 switch (le32_to_cpu(info->Type)) {
97 inode->i_mode |= S_IFREG;
100 inode->i_mode |= S_IFLNK;
103 inode->i_mode |= S_IFDIR;
106 inode->i_mode |= S_IFCHR;
107 inode->i_rdev = MKDEV(le64_to_cpu(info->DevMajor),
108 le64_to_cpu(info->DevMinor) & MINORMASK);
111 inode->i_mode |= S_IFBLK;
112 inode->i_rdev = MKDEV(le64_to_cpu(info->DevMajor),
113 le64_to_cpu(info->DevMinor) & MINORMASK);
116 inode->i_mode |= S_IFIFO;
119 inode->i_mode |= S_IFSOCK;
122 /* safest to call it a file if we do not know */
123 inode->i_mode |= S_IFREG;
124 cFYI(1, ("unknown type %d", le32_to_cpu(info->Type)));
128 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) &&
130 inode->i_uid = cifs_sb->mnt_uid;
132 inode->i_uid = le64_to_cpu(info->Uid);
134 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) &&
136 inode->i_gid = cifs_sb->mnt_gid;
138 inode->i_gid = le64_to_cpu(info->Gid);
140 inode->i_nlink = le64_to_cpu(info->Nlinks);
142 spin_lock(&inode->i_lock);
143 if (is_size_safe_to_change(cifsInfo, end_of_file)) {
145 * We can not safely change the file size here if the client
146 * is writing to it due to potential races.
148 i_size_write(inode, end_of_file);
151 * i_blocks is not related to (i_size / i_blksize),
152 * but instead 512 byte (2**9) size is required for
153 * calculating num blocks.
155 inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
157 spin_unlock(&inode->i_lock);
160 static const unsigned char *cifs_get_search_path(struct cifsTconInfo *pTcon,
161 const char *search_path)
167 if (!(pTcon->Flags & SMB_SHARE_IS_IN_DFS))
170 /* use full path name for working with DFS */
171 tree_len = strnlen(pTcon->treeName, MAX_TREE_SIZE + 1);
172 path_len = strnlen(search_path, MAX_PATHCONF);
174 tmp_path = kmalloc(tree_len+path_len+1, GFP_KERNEL);
175 if (tmp_path == NULL)
178 strncpy(tmp_path, pTcon->treeName, tree_len);
179 strncpy(tmp_path+tree_len, search_path, path_len);
180 tmp_path[tree_len+path_len] = 0;
184 int cifs_get_inode_info_unix(struct inode **pinode,
185 const unsigned char *search_path, struct super_block *sb, int xid)
188 FILE_UNIX_BASIC_INFO findData;
189 struct cifsTconInfo *pTcon;
191 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
192 const unsigned char *full_path;
193 bool is_dfs_referral = false;
195 pTcon = cifs_sb->tcon;
196 cFYI(1, ("Getting info on %s", search_path));
198 full_path = cifs_get_search_path(pTcon, search_path);
200 try_again_CIFSSMBUnixQPathInfo:
201 /* could have done a find first instead but this returns more info */
202 rc = CIFSSMBUnixQPathInfo(xid, pTcon, full_path, &findData,
203 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
204 CIFS_MOUNT_MAP_SPECIAL_CHR);
205 /* dump_mem("\nUnixQPathInfo return data", &findData,
206 sizeof(findData)); */
208 if (rc == -EREMOTE && !is_dfs_referral) {
209 is_dfs_referral = true;
210 full_path = search_path;
211 goto try_again_CIFSSMBUnixQPathInfo;
215 struct cifsInodeInfo *cifsInfo;
216 __u64 num_of_bytes = le64_to_cpu(findData.NumOfBytes);
217 __u64 end_of_file = le64_to_cpu(findData.EndOfFile);
220 if (*pinode == NULL) {
221 *pinode = new_inode(sb);
222 if (*pinode == NULL) {
226 /* Is an i_ino of zero legal? */
227 /* Are there sanity checks we can use to ensure that
228 the server is really filling in that field? */
229 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
231 (unsigned long)findData.UniqueId;
232 } /* note ino incremented to unique num in new_inode */
233 if (sb->s_flags & MS_NOATIME)
234 (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
236 insert_inode_hash(*pinode);
240 cifsInfo = CIFS_I(inode);
242 cFYI(1, ("Old time %ld", cifsInfo->time));
243 cifsInfo->time = jiffies;
244 cFYI(1, ("New time %ld", cifsInfo->time));
245 /* this is ok to set on every inode revalidate */
246 atomic_set(&cifsInfo->inUse, 1);
248 cifs_unix_info_to_inode(inode, &findData, 0);
251 if (num_of_bytes < end_of_file)
252 cFYI(1, ("allocation size less than end of file"));
253 cFYI(1, ("Size %ld and blocks %llu",
254 (unsigned long) inode->i_size,
255 (unsigned long long)inode->i_blocks));
257 cifs_set_ops(inode, is_dfs_referral);
260 if (full_path != search_path)
265 static int decode_sfu_inode(struct inode *inode, __u64 size,
266 const unsigned char *path,
267 struct cifs_sb_info *cifs_sb, int xid)
272 struct cifsTconInfo *pTcon = cifs_sb->tcon;
274 unsigned int bytes_read;
280 inode->i_mode |= S_IFIFO;
282 } else if (size < 8) {
283 return -EINVAL; /* EOPNOTSUPP? */
286 rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ,
287 CREATE_NOT_DIR, &netfid, &oplock, NULL,
289 cifs_sb->mnt_cifs_flags &
290 CIFS_MOUNT_MAP_SPECIAL_CHR);
292 int buf_type = CIFS_NO_BUFFER;
294 rc = CIFSSMBRead(xid, pTcon,
296 24 /* length */, 0 /* offset */,
297 &bytes_read, &pbuf, &buf_type);
298 if ((rc == 0) && (bytes_read >= 8)) {
299 if (memcmp("IntxBLK", pbuf, 8) == 0) {
300 cFYI(1, ("Block device"));
301 inode->i_mode |= S_IFBLK;
302 if (bytes_read == 24) {
303 /* we have enough to decode dev num */
304 __u64 mjr; /* major */
305 __u64 mnr; /* minor */
306 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
307 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
308 inode->i_rdev = MKDEV(mjr, mnr);
310 } else if (memcmp("IntxCHR", pbuf, 8) == 0) {
311 cFYI(1, ("Char device"));
312 inode->i_mode |= S_IFCHR;
313 if (bytes_read == 24) {
314 /* we have enough to decode dev num */
315 __u64 mjr; /* major */
316 __u64 mnr; /* minor */
317 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
318 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
319 inode->i_rdev = MKDEV(mjr, mnr);
321 } else if (memcmp("IntxLNK", pbuf, 7) == 0) {
322 cFYI(1, ("Symlink"));
323 inode->i_mode |= S_IFLNK;
325 inode->i_mode |= S_IFREG; /* file? */
329 inode->i_mode |= S_IFREG; /* then it is a file */
330 rc = -EOPNOTSUPP; /* or some unknown SFU type */
332 CIFSSMBClose(xid, pTcon, netfid);
337 #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
339 static int get_sfu_mode(struct inode *inode,
340 const unsigned char *path,
341 struct cifs_sb_info *cifs_sb, int xid)
343 #ifdef CONFIG_CIFS_XATTR
348 rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS",
349 ea_value, 4 /* size of buf */, cifs_sb->local_nls,
350 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
354 mode = le32_to_cpu(*((__le32 *)ea_value));
355 inode->i_mode &= ~SFBITS_MASK;
356 cFYI(1, ("special bits 0%o org mode 0%o", mode, inode->i_mode));
357 inode->i_mode = (mode & SFBITS_MASK) | inode->i_mode;
358 cFYI(1, ("special mode bits 0%o", mode));
368 int cifs_get_inode_info(struct inode **pinode,
369 const unsigned char *search_path, FILE_ALL_INFO *pfindData,
370 struct super_block *sb, int xid)
373 struct cifsTconInfo *pTcon;
375 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
376 const unsigned char *full_path = NULL;
378 int adjustTZ = FALSE;
379 bool is_dfs_referral = false;
381 pTcon = cifs_sb->tcon;
382 cFYI(1, ("Getting info on %s", search_path));
384 if ((pfindData == NULL) && (*pinode != NULL)) {
385 if (CIFS_I(*pinode)->clientCanCacheRead) {
386 cFYI(1, ("No need to revalidate cached inode sizes"));
391 /* if file info not passed in then get it from server */
392 if (pfindData == NULL) {
393 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
396 pfindData = (FILE_ALL_INFO *)buf;
398 full_path = cifs_get_search_path(pTcon, search_path);
400 try_again_CIFSSMBQPathInfo:
401 /* could do find first instead but this returns more info */
402 rc = CIFSSMBQPathInfo(xid, pTcon, full_path, pfindData,
404 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
405 CIFS_MOUNT_MAP_SPECIAL_CHR);
406 /* BB optimize code so we do not make the above call
407 when server claims no NT SMB support and the above call
408 failed at least once - set flag in tcon or mount */
409 if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
410 rc = SMBQueryInformation(xid, pTcon, full_path,
411 pfindData, cifs_sb->local_nls,
412 cifs_sb->mnt_cifs_flags &
413 CIFS_MOUNT_MAP_SPECIAL_CHR);
417 /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
419 if (rc == -EREMOTE && !is_dfs_referral) {
420 is_dfs_referral = true;
421 full_path = search_path;
422 goto try_again_CIFSSMBQPathInfo;
426 struct cifsInodeInfo *cifsInfo;
427 __u32 attr = le32_to_cpu(pfindData->Attributes);
430 if (*pinode == NULL) {
431 *pinode = new_inode(sb);
432 if (*pinode == NULL) {
436 /* Is an i_ino of zero legal? Can we use that to check
437 if the server supports returning inode numbers? Are
438 there other sanity checks we can use to ensure that
439 the server is really filling in that field? */
441 /* We can not use the IndexNumber field by default from
442 Windows or Samba (in ALL_INFO buf) but we can request
443 it explicitly. It may not be unique presumably if
444 the server has multiple devices mounted under one
447 /* There may be higher info levels that work but are
448 there Windows server or network appliances for which
449 IndexNumber field is not guaranteed unique? */
451 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
455 rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
456 search_path, &inode_num,
458 cifs_sb->mnt_cifs_flags &
459 CIFS_MOUNT_MAP_SPECIAL_CHR);
461 cFYI(1, ("GetSrvInodeNum rc %d", rc1));
462 /* BB EOPNOSUPP disable SERVER_INUM? */
463 } else /* do we need cast or hash to ino? */
464 (*pinode)->i_ino = inode_num;
465 } /* else ino incremented to unique num in new_inode*/
466 if (sb->s_flags & MS_NOATIME)
467 (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
468 insert_inode_hash(*pinode);
471 cifsInfo = CIFS_I(inode);
472 cifsInfo->cifsAttrs = attr;
473 cFYI(1, ("Old time %ld", cifsInfo->time));
474 cifsInfo->time = jiffies;
475 cFYI(1, ("New time %ld", cifsInfo->time));
477 /* blksize needs to be multiple of two. So safer to default to
478 blksize and blkbits set in superblock so 2**blkbits and blksize
479 will match rather than setting to:
480 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
482 /* Linux can not store file creation time so ignore it */
483 if (pfindData->LastAccessTime)
484 inode->i_atime = cifs_NTtimeToUnix
485 (le64_to_cpu(pfindData->LastAccessTime));
486 else /* do not need to use current_fs_time - time not stored */
487 inode->i_atime = CURRENT_TIME;
489 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
491 cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
492 cFYI(0, ("Attributes came in as 0x%x", attr));
493 if (adjustTZ && (pTcon->ses) && (pTcon->ses->server)) {
494 inode->i_ctime.tv_sec += pTcon->ses->server->timeAdj;
495 inode->i_mtime.tv_sec += pTcon->ses->server->timeAdj;
498 /* set default mode. will override for dirs below */
499 if (atomic_read(&cifsInfo->inUse) == 0)
500 /* new inode, can safely set these fields */
501 inode->i_mode = cifs_sb->mnt_file_mode;
502 else /* since we set the inode type below we need to mask off
503 to avoid strange results if type changes and both
505 inode->i_mode &= ~S_IFMT;
506 /* if (attr & ATTR_REPARSE) */
507 /* We no longer handle these as symlinks because we could not
508 follow them due to the absolute path with drive letter */
509 if (attr & ATTR_DIRECTORY) {
510 /* override default perms since we do not do byte range locking
512 inode->i_mode = cifs_sb->mnt_dir_mode;
513 inode->i_mode |= S_IFDIR;
514 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
515 (cifsInfo->cifsAttrs & ATTR_SYSTEM) &&
516 /* No need to le64 convert size of zero */
517 (pfindData->EndOfFile == 0)) {
518 inode->i_mode = cifs_sb->mnt_file_mode;
519 inode->i_mode |= S_IFIFO;
520 /* BB Finish for SFU style symlinks and devices */
521 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
522 (cifsInfo->cifsAttrs & ATTR_SYSTEM)) {
523 if (decode_sfu_inode(inode,
524 le64_to_cpu(pfindData->EndOfFile),
527 cFYI(1, ("Unrecognized sfu inode type"));
529 cFYI(1, ("sfu mode 0%o", inode->i_mode));
531 inode->i_mode |= S_IFREG;
532 /* treat the dos attribute of read-only as read-only
534 if (cifsInfo->cifsAttrs & ATTR_READONLY)
535 inode->i_mode &= ~(S_IWUGO);
536 else if ((inode->i_mode & S_IWUGO) == 0)
537 /* the ATTR_READONLY flag may have been */
538 /* changed on server -- set any w bits */
539 /* allowed by mnt_file_mode */
540 inode->i_mode |= (S_IWUGO &
541 cifs_sb->mnt_file_mode);
542 /* BB add code here -
543 validate if device or weird share or device type? */
546 spin_lock(&inode->i_lock);
547 if (is_size_safe_to_change(cifsInfo,
548 le64_to_cpu(pfindData->EndOfFile))) {
549 /* can not safely shrink the file size here if the
550 client is writing to it due to potential races */
551 i_size_write(inode, le64_to_cpu(pfindData->EndOfFile));
553 /* 512 bytes (2**9) is the fake blocksize that must be
554 used for this calculation */
555 inode->i_blocks = (512 - 1 + le64_to_cpu(
556 pfindData->AllocationSize)) >> 9;
558 spin_unlock(&inode->i_lock);
560 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
562 /* BB fill in uid and gid here? with help from winbind?
563 or retrieve from NTFS stream extended attribute */
564 #ifdef CONFIG_CIFS_EXPERIMENTAL
565 /* fill in 0777 bits from ACL */
566 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
567 cFYI(1, ("Getting mode bits from ACL"));
568 acl_to_uid_mode(inode, search_path);
571 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
572 /* fill in remaining high mode bits e.g. SUID, VTX */
573 get_sfu_mode(inode, search_path, cifs_sb, xid);
574 } else if (atomic_read(&cifsInfo->inUse) == 0) {
575 inode->i_uid = cifs_sb->mnt_uid;
576 inode->i_gid = cifs_sb->mnt_gid;
577 /* set so we do not keep refreshing these fields with
578 bad data after user has changed them in memory */
579 atomic_set(&cifsInfo->inUse, 1);
582 cifs_set_ops(inode, is_dfs_referral);
585 if (full_path != search_path)
591 static const struct inode_operations cifs_ipc_inode_ops = {
592 .lookup = cifs_lookup,
595 /* gets root inode */
596 struct inode *cifs_iget(struct super_block *sb, unsigned long ino)
599 struct cifs_sb_info *cifs_sb;
603 inode = iget_locked(sb, ino);
605 return ERR_PTR(-ENOMEM);
606 if (!(inode->i_state & I_NEW))
609 cifs_sb = CIFS_SB(inode->i_sb);
612 if (cifs_sb->tcon->unix_ext)
613 rc = cifs_get_inode_info_unix(&inode, "", inode->i_sb, xid);
615 rc = cifs_get_inode_info(&inode, "", NULL, inode->i_sb, xid);
616 if (rc && cifs_sb->tcon->ipc) {
617 cFYI(1, ("ipc connection - fake read inode"));
618 inode->i_mode |= S_IFDIR;
620 inode->i_op = &cifs_ipc_inode_ops;
621 inode->i_fop = &simple_dir_operations;
622 inode->i_uid = cifs_sb->mnt_uid;
623 inode->i_gid = cifs_sb->mnt_gid;
629 unlock_new_inode(inode);
631 /* can not call macro FreeXid here since in a void func
632 * TODO: This is no longer true
638 int cifs_unlink(struct inode *inode, struct dentry *direntry)
642 struct cifs_sb_info *cifs_sb;
643 struct cifsTconInfo *pTcon;
644 char *full_path = NULL;
645 struct cifsInodeInfo *cifsInode;
646 FILE_BASIC_INFO *pinfo_buf;
648 cFYI(1, ("cifs_unlink, inode = 0x%p", inode));
653 cifs_sb = CIFS_SB(inode->i_sb);
655 cifs_sb = CIFS_SB(direntry->d_sb);
656 pTcon = cifs_sb->tcon;
658 /* Unlink can be called from rename so we can not grab the sem here
659 since we deadlock otherwise */
660 /* mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/
661 full_path = build_path_from_dentry(direntry);
662 /* mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/
663 if (full_path == NULL) {
668 if ((pTcon->ses->capabilities & CAP_UNIX) &&
669 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
670 le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
671 rc = CIFSPOSIXDelFile(xid, pTcon, full_path,
672 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
673 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
674 cFYI(1, ("posix del rc %d", rc));
675 if ((rc == 0) || (rc == -ENOENT))
676 goto psx_del_no_retry;
679 rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
680 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
683 if (direntry->d_inode)
684 drop_nlink(direntry->d_inode);
685 } else if (rc == -ENOENT) {
687 } else if (rc == -ETXTBSY) {
691 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
692 CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
693 &netfid, &oplock, NULL, cifs_sb->local_nls,
694 cifs_sb->mnt_cifs_flags &
695 CIFS_MOUNT_MAP_SPECIAL_CHR);
697 CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
699 cifs_sb->mnt_cifs_flags &
700 CIFS_MOUNT_MAP_SPECIAL_CHR);
701 CIFSSMBClose(xid, pTcon, netfid);
702 if (direntry->d_inode)
703 drop_nlink(direntry->d_inode);
705 } else if (rc == -EACCES) {
706 /* try only if r/o attribute set in local lookup data? */
707 pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
709 /* ATTRS set to normal clears r/o bit */
710 pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
711 if (!(pTcon->ses->flags & CIFS_SES_NT4))
712 rc = CIFSSMBSetTimes(xid, pTcon, full_path,
715 cifs_sb->mnt_cifs_flags &
716 CIFS_MOUNT_MAP_SPECIAL_CHR);
720 if (rc == -EOPNOTSUPP) {
723 /* rc = CIFSSMBSetAttrLegacy(xid, pTcon,
727 For some strange reason it seems that NT4 eats the
728 old setattr call without actually setting the
729 attributes so on to the third attempted workaround
732 /* BB could scan to see if we already have it open
733 and pass in pid of opener to function */
734 rc = CIFSSMBOpen(xid, pTcon, full_path,
735 FILE_OPEN, SYNCHRONIZE |
736 FILE_WRITE_ATTRIBUTES, 0,
737 &netfid, &oplock, NULL,
739 cifs_sb->mnt_cifs_flags &
740 CIFS_MOUNT_MAP_SPECIAL_CHR);
742 rc = CIFSSMBSetFileTimes(xid, pTcon,
745 CIFSSMBClose(xid, pTcon, netfid);
751 rc = CIFSSMBDelFile(xid, pTcon, full_path,
753 cifs_sb->mnt_cifs_flags &
754 CIFS_MOUNT_MAP_SPECIAL_CHR);
756 if (direntry->d_inode)
757 drop_nlink(direntry->d_inode);
758 } else if (rc == -ETXTBSY) {
762 rc = CIFSSMBOpen(xid, pTcon, full_path,
765 CREATE_DELETE_ON_CLOSE,
766 &netfid, &oplock, NULL,
768 cifs_sb->mnt_cifs_flags &
769 CIFS_MOUNT_MAP_SPECIAL_CHR);
771 CIFSSMBRenameOpenFile(xid, pTcon,
774 cifs_sb->mnt_cifs_flags &
775 CIFS_MOUNT_MAP_SPECIAL_CHR);
776 CIFSSMBClose(xid, pTcon, netfid);
777 if (direntry->d_inode)
778 drop_nlink(direntry->d_inode);
780 /* BB if rc = -ETXTBUSY goto the rename logic BB */
784 if (direntry->d_inode) {
785 cifsInode = CIFS_I(direntry->d_inode);
786 cifsInode->time = 0; /* will force revalidate to get info
788 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
791 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
792 cifsInode = CIFS_I(inode);
793 cifsInode->time = 0; /* force revalidate of dir as well */
801 static void posix_fill_in_inode(struct inode *tmp_inode,
802 FILE_UNIX_BASIC_INFO *pData, int isNewInode)
804 struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
806 struct timespec local_mtime;
808 cifsInfo->time = jiffies;
809 atomic_inc(&cifsInfo->inUse);
811 /* save mtime and size */
812 local_mtime = tmp_inode->i_mtime;
813 local_size = tmp_inode->i_size;
815 cifs_unix_info_to_inode(tmp_inode, pData, 1);
816 cifs_set_ops(tmp_inode, false);
818 if (!S_ISREG(tmp_inode->i_mode))
822 * No sense invalidating pages for new inode
823 * since we we have not started caching
824 * readahead file data yet.
829 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
830 (local_size == tmp_inode->i_size)) {
831 cFYI(1, ("inode exists but unchanged"));
833 /* file may have changed on server */
834 cFYI(1, ("invalidate inode, readdir detected change"));
835 invalidate_remote_inode(tmp_inode);
839 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
843 struct cifs_sb_info *cifs_sb;
844 struct cifsTconInfo *pTcon;
845 char *full_path = NULL;
846 struct inode *newinode = NULL;
848 cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
852 cifs_sb = CIFS_SB(inode->i_sb);
853 pTcon = cifs_sb->tcon;
855 full_path = build_path_from_dentry(direntry);
856 if (full_path == NULL) {
861 if ((pTcon->ses->capabilities & CAP_UNIX) &&
862 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
863 le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
865 FILE_UNIX_BASIC_INFO *pInfo =
866 kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
872 mode &= ~current->fs->umask;
873 rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT,
874 mode, NULL /* netfid */, pInfo, &oplock,
875 full_path, cifs_sb->local_nls,
876 cifs_sb->mnt_cifs_flags &
877 CIFS_MOUNT_MAP_SPECIAL_CHR);
878 if (rc == -EOPNOTSUPP) {
880 goto mkdir_retry_old;
882 cFYI(1, ("posix mkdir returned 0x%x", rc));
885 if (pInfo->Type == cpu_to_le32(-1)) {
886 /* no return info, go query for it */
890 /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
894 direntry->d_op = &cifs_ci_dentry_ops;
896 direntry->d_op = &cifs_dentry_ops;
898 newinode = new_inode(inode->i_sb);
899 if (newinode == NULL) {
903 /* Is an i_ino of zero legal? */
904 /* Are there sanity checks we can use to ensure that
905 the server is really filling in that field? */
906 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
908 (unsigned long)pInfo->UniqueId;
909 } /* note ino incremented to unique num in new_inode */
910 if (inode->i_sb->s_flags & MS_NOATIME)
911 newinode->i_flags |= S_NOATIME | S_NOCMTIME;
912 newinode->i_nlink = 2;
914 insert_inode_hash(newinode);
915 d_instantiate(direntry, newinode);
917 /* we already checked in POSIXCreate whether
918 frame was long enough */
919 posix_fill_in_inode(direntry->d_inode,
920 pInfo, 1 /* NewInode */);
921 #ifdef CONFIG_CIFS_DEBUG2
922 cFYI(1, ("instantiated dentry %p %s to inode %p",
923 direntry, direntry->d_name.name, newinode));
925 if (newinode->i_nlink != 2)
926 cFYI(1, ("unexpected number of links %d",
934 /* BB add setting the equivalent of mode via CreateX w/ACLs */
935 rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
936 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
938 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
944 rc = cifs_get_inode_info_unix(&newinode, full_path,
947 rc = cifs_get_inode_info(&newinode, full_path, NULL,
951 direntry->d_op = &cifs_ci_dentry_ops;
953 direntry->d_op = &cifs_dentry_ops;
954 d_instantiate(direntry, newinode);
955 /* setting nlink not necessary except in cases where we
956 * failed to get it from the server or was set bogus */
957 if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
958 direntry->d_inode->i_nlink = 2;
959 if (pTcon->unix_ext) {
960 mode &= ~current->fs->umask;
961 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
962 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
964 (__u64)current->fsuid,
965 (__u64)current->fsgid,
968 cifs_sb->mnt_cifs_flags &
969 CIFS_MOUNT_MAP_SPECIAL_CHR);
971 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
973 (__u64)-1, 0 /* dev_t */,
975 cifs_sb->mnt_cifs_flags &
976 CIFS_MOUNT_MAP_SPECIAL_CHR);
979 /* BB to be implemented via Windows secrty descriptors
980 eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
981 -1, -1, local_nls); */
982 if (direntry->d_inode) {
983 direntry->d_inode->i_mode = mode;
984 direntry->d_inode->i_mode |= S_IFDIR;
985 if (cifs_sb->mnt_cifs_flags &
986 CIFS_MOUNT_SET_UID) {
987 direntry->d_inode->i_uid =
989 direntry->d_inode->i_gid =
1001 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1005 struct cifs_sb_info *cifs_sb;
1006 struct cifsTconInfo *pTcon;
1007 char *full_path = NULL;
1008 struct cifsInodeInfo *cifsInode;
1010 cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
1014 cifs_sb = CIFS_SB(inode->i_sb);
1015 pTcon = cifs_sb->tcon;
1017 full_path = build_path_from_dentry(direntry);
1018 if (full_path == NULL) {
1023 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1024 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1028 spin_lock(&direntry->d_inode->i_lock);
1029 i_size_write(direntry->d_inode, 0);
1030 clear_nlink(direntry->d_inode);
1031 spin_unlock(&direntry->d_inode->i_lock);
1034 cifsInode = CIFS_I(direntry->d_inode);
1035 cifsInode->time = 0; /* force revalidate to go get info when
1037 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1038 current_fs_time(inode->i_sb);
1045 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
1046 struct inode *target_inode, struct dentry *target_direntry)
1050 struct cifs_sb_info *cifs_sb_source;
1051 struct cifs_sb_info *cifs_sb_target;
1052 struct cifsTconInfo *pTcon;
1058 cifs_sb_target = CIFS_SB(target_inode->i_sb);
1059 cifs_sb_source = CIFS_SB(source_inode->i_sb);
1060 pTcon = cifs_sb_source->tcon;
1062 if (pTcon != cifs_sb_target->tcon) {
1064 return -EXDEV; /* BB actually could be allowed if same server,
1065 but different share.
1066 Might eventually add support for this */
1069 /* we already have the rename sem so we do not need to grab it again
1070 here to protect the path integrity */
1071 fromName = build_path_from_dentry(source_direntry);
1072 toName = build_path_from_dentry(target_direntry);
1073 if ((fromName == NULL) || (toName == NULL)) {
1075 goto cifs_rename_exit;
1078 rc = CIFSSMBRename(xid, pTcon, fromName, toName,
1079 cifs_sb_source->local_nls,
1080 cifs_sb_source->mnt_cifs_flags &
1081 CIFS_MOUNT_MAP_SPECIAL_CHR);
1082 if (rc == -EEXIST) {
1083 /* check if they are the same file because rename of hardlinked
1085 FILE_UNIX_BASIC_INFO *info_buf_source;
1086 FILE_UNIX_BASIC_INFO *info_buf_target;
1089 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1090 if (info_buf_source != NULL) {
1091 info_buf_target = info_buf_source + 1;
1092 if (pTcon->unix_ext)
1093 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
1095 cifs_sb_source->local_nls,
1096 cifs_sb_source->mnt_cifs_flags &
1097 CIFS_MOUNT_MAP_SPECIAL_CHR);
1098 /* else rc is still EEXIST so will fall through to
1099 unlink the target and retry rename */
1101 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
1103 cifs_sb_target->local_nls,
1104 /* remap based on source sb */
1105 cifs_sb_source->mnt_cifs_flags &
1106 CIFS_MOUNT_MAP_SPECIAL_CHR);
1109 (info_buf_source->UniqueId ==
1110 info_buf_target->UniqueId)) {
1111 /* do not rename since the files are hardlinked which
1114 /* we either can not tell the files are hardlinked
1115 (as with Windows servers) or files are not
1116 hardlinked so delete the target manually before
1117 renaming to follow POSIX rather than Windows
1119 cifs_unlink(target_inode, target_direntry);
1120 rc = CIFSSMBRename(xid, pTcon, fromName,
1122 cifs_sb_source->local_nls,
1123 cifs_sb_source->mnt_cifs_flags
1124 & CIFS_MOUNT_MAP_SPECIAL_CHR);
1126 kfree(info_buf_source);
1127 } /* if we can not get memory just leave rc as EEXIST */
1131 cFYI(1, ("rename rc %d", rc));
1133 if ((rc == -EIO) || (rc == -EEXIST)) {
1137 /* BB FIXME Is Generic Read correct for rename? */
1138 /* if renaming directory - we should not say CREATE_NOT_DIR,
1139 need to test renaming open directory, also GENERIC_READ
1140 might not right be right access to request */
1141 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
1142 CREATE_NOT_DIR, &netfid, &oplock, NULL,
1143 cifs_sb_source->local_nls,
1144 cifs_sb_source->mnt_cifs_flags &
1145 CIFS_MOUNT_MAP_SPECIAL_CHR);
1147 rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
1148 cifs_sb_source->local_nls,
1149 cifs_sb_source->mnt_cifs_flags &
1150 CIFS_MOUNT_MAP_SPECIAL_CHR);
1151 CIFSSMBClose(xid, pTcon, netfid);
1162 int cifs_revalidate(struct dentry *direntry)
1165 int rc = 0, wbrc = 0;
1167 struct cifs_sb_info *cifs_sb;
1168 struct cifsInodeInfo *cifsInode;
1170 struct timespec local_mtime;
1171 int invalidate_inode = FALSE;
1173 if (direntry->d_inode == NULL)
1176 cifsInode = CIFS_I(direntry->d_inode);
1178 if (cifsInode == NULL)
1181 /* no sense revalidating inode info on file that no one can write */
1182 if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
1187 cifs_sb = CIFS_SB(direntry->d_sb);
1189 /* can not safely grab the rename sem here if rename calls revalidate
1190 since that would deadlock */
1191 full_path = build_path_from_dentry(direntry);
1192 if (full_path == NULL) {
1196 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1197 "jiffies %ld", full_path, direntry->d_inode,
1198 direntry->d_inode->i_count.counter, direntry,
1199 direntry->d_time, jiffies));
1201 if (cifsInode->time == 0) {
1202 /* was set to zero previously to force revalidate */
1203 } else if (time_before(jiffies, cifsInode->time + HZ) &&
1204 lookupCacheEnabled) {
1205 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1206 (direntry->d_inode->i_nlink == 1)) {
1211 cFYI(1, ("Have to revalidate file due to hardlinks"));
1215 /* save mtime and size */
1216 local_mtime = direntry->d_inode->i_mtime;
1217 local_size = direntry->d_inode->i_size;
1219 if (cifs_sb->tcon->unix_ext) {
1220 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1221 direntry->d_sb, xid);
1223 cFYI(1, ("error on getting revalidate info %d", rc));
1224 /* if (rc != -ENOENT)
1225 rc = 0; */ /* BB should we cache info on
1229 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1230 direntry->d_sb, xid);
1232 cFYI(1, ("error on getting revalidate info %d", rc));
1233 /* if (rc != -ENOENT)
1234 rc = 0; */ /* BB should we cache info on
1238 /* should we remap certain errors, access denied?, to zero */
1240 /* if not oplocked, we invalidate inode pages if mtime or file size
1241 had changed on server */
1243 if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) &&
1244 (local_size == direntry->d_inode->i_size)) {
1245 cFYI(1, ("cifs_revalidate - inode unchanged"));
1247 /* file may have changed on server */
1248 if (cifsInode->clientCanCacheRead) {
1249 /* no need to invalidate inode pages since we were the
1250 only ones who could have modified the file and the
1251 server copy is staler than ours */
1253 invalidate_inode = TRUE;
1257 /* can not grab this sem since kernel filesys locking documentation
1258 indicates i_mutex may be taken by the kernel on lookup and rename
1259 which could deadlock if we grab the i_mutex here as well */
1260 /* mutex_lock(&direntry->d_inode->i_mutex);*/
1261 /* need to write out dirty pages here */
1262 if (direntry->d_inode->i_mapping) {
1263 /* do we need to lock inode until after invalidate completes
1265 wbrc = filemap_fdatawrite(direntry->d_inode->i_mapping);
1267 CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1269 if (invalidate_inode) {
1270 /* shrink_dcache not necessary now that cifs dentry ops
1271 are exported for negative dentries */
1272 /* if (S_ISDIR(direntry->d_inode->i_mode))
1273 shrink_dcache_parent(direntry); */
1274 if (S_ISREG(direntry->d_inode->i_mode)) {
1275 if (direntry->d_inode->i_mapping)
1276 wbrc = filemap_fdatawait(direntry->d_inode->i_mapping);
1278 CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1279 /* may eventually have to do this for open files too */
1280 if (list_empty(&(cifsInode->openFileList))) {
1281 /* changed on server - flush read ahead pages */
1282 cFYI(1, ("Invalidating read ahead data on "
1284 invalidate_remote_inode(direntry->d_inode);
1288 /* mutex_unlock(&direntry->d_inode->i_mutex); */
1295 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1298 int err = cifs_revalidate(dentry);
1300 generic_fillattr(dentry->d_inode, stat);
1301 stat->blksize = CIFS_MAX_MSGSIZE;
1306 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1308 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1309 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1313 page = grab_cache_page(mapping, index);
1317 zero_user_segment(page, offset, PAGE_CACHE_SIZE);
1319 page_cache_release(page);
1323 static int cifs_vmtruncate(struct inode *inode, loff_t offset)
1325 struct address_space *mapping = inode->i_mapping;
1326 unsigned long limit;
1328 spin_lock(&inode->i_lock);
1329 if (inode->i_size < offset)
1332 * truncation of in-use swapfiles is disallowed - it would cause
1333 * subsequent swapout to scribble on the now-freed blocks.
1335 if (IS_SWAPFILE(inode)) {
1336 spin_unlock(&inode->i_lock);
1339 i_size_write(inode, offset);
1340 spin_unlock(&inode->i_lock);
1342 * unmap_mapping_range is called twice, first simply for efficiency
1343 * so that truncate_inode_pages does fewer single-page unmaps. However
1344 * after this first call, and before truncate_inode_pages finishes,
1345 * it is possible for private pages to be COWed, which remain after
1346 * truncate_inode_pages finishes, hence the second unmap_mapping_range
1347 * call must be made for correctness.
1349 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1350 truncate_inode_pages(mapping, offset);
1351 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1355 limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
1356 if (limit != RLIM_INFINITY && offset > limit) {
1357 spin_unlock(&inode->i_lock);
1360 if (offset > inode->i_sb->s_maxbytes) {
1361 spin_unlock(&inode->i_lock);
1364 i_size_write(inode, offset);
1365 spin_unlock(&inode->i_lock);
1367 if (inode->i_op && inode->i_op->truncate)
1368 inode->i_op->truncate(inode);
1371 send_sig(SIGXFSZ, current, 0);
1378 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1381 struct cifs_sb_info *cifs_sb;
1382 struct cifsTconInfo *pTcon;
1383 char *full_path = NULL;
1385 struct cifsFileInfo *open_file = NULL;
1386 FILE_BASIC_INFO time_buf;
1387 int set_time = FALSE;
1388 int set_dosattr = FALSE;
1389 __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1390 __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1391 __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1392 struct cifsInodeInfo *cifsInode;
1396 cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1397 direntry->d_name.name, attrs->ia_valid));
1399 cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
1400 pTcon = cifs_sb->tcon;
1402 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1403 /* check if we have permission to change attrs */
1404 rc = inode_change_ok(direntry->d_inode, attrs);
1412 full_path = build_path_from_dentry(direntry);
1413 if (full_path == NULL) {
1417 cifsInode = CIFS_I(direntry->d_inode);
1419 /* BB check if we need to refresh inode from server now ? BB */
1421 if (attrs->ia_valid & ATTR_SIZE) {
1423 Flush data before changing file size on server. If the
1424 flush returns error, store it to report later and continue.
1425 BB: This should be smarter. Why bother flushing pages that
1426 will be truncated anyway? Also, should we error out here if
1427 the flush returns error?
1429 rc = filemap_write_and_wait(direntry->d_inode->i_mapping);
1431 CIFS_I(direntry->d_inode)->write_behind_rc = rc;
1435 /* To avoid spurious oplock breaks from server, in the case of
1436 inodes that we already have open, avoid doing path based
1437 setting of file size if we can do it by handle.
1438 This keeps our caching token (oplock) and avoids timeouts
1439 when the local oplock break takes longer to flush
1440 writebehind data than the SMB timeout for the SetPathInfo
1441 request would allow */
1443 open_file = find_writable_file(cifsInode);
1445 __u16 nfid = open_file->netfid;
1446 __u32 npid = open_file->pid;
1447 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1449 atomic_dec(&open_file->wrtPending);
1450 cFYI(1, ("SetFSize for attrs rc = %d", rc));
1451 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1452 unsigned int bytes_written;
1453 rc = CIFSSMBWrite(xid, pTcon,
1454 nfid, 0, attrs->ia_size,
1455 &bytes_written, NULL, NULL,
1456 1 /* 45 seconds */);
1457 cFYI(1, ("Wrt seteof rc %d", rc));
1463 /* Set file size by pathname rather than by handle
1464 either because no valid, writeable file handle for
1465 it was found or because there was an error setting
1467 rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1468 attrs->ia_size, FALSE,
1470 cifs_sb->mnt_cifs_flags &
1471 CIFS_MOUNT_MAP_SPECIAL_CHR);
1472 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1473 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1477 rc = SMBLegacyOpen(xid, pTcon, full_path,
1479 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1480 CREATE_NOT_DIR, &netfid, &oplock,
1481 NULL, cifs_sb->local_nls,
1482 cifs_sb->mnt_cifs_flags &
1483 CIFS_MOUNT_MAP_SPECIAL_CHR);
1485 unsigned int bytes_written;
1486 rc = CIFSSMBWrite(xid, pTcon,
1489 &bytes_written, NULL,
1490 NULL, 1 /* 45 sec */);
1491 cFYI(1, ("wrt seteof rc %d", rc));
1492 CIFSSMBClose(xid, pTcon, netfid);
1498 /* Server is ok setting allocation size implicitly - no need
1500 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1501 cifs_sb->local_nls);
1505 rc = cifs_vmtruncate(direntry->d_inode, attrs->ia_size);
1506 cifs_truncate_page(direntry->d_inode->i_mapping,
1507 direntry->d_inode->i_size);
1509 goto cifs_setattr_exit;
1511 if (attrs->ia_valid & ATTR_UID) {
1512 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1513 uid = attrs->ia_uid;
1515 if (attrs->ia_valid & ATTR_GID) {
1516 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1517 gid = attrs->ia_gid;
1520 time_buf.Attributes = 0;
1522 /* skip mode change if it's just for clearing setuid/setgid */
1523 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1524 attrs->ia_valid &= ~ATTR_MODE;
1526 if (attrs->ia_valid & ATTR_MODE) {
1527 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1528 mode = attrs->ia_mode;
1531 if ((pTcon->unix_ext)
1532 && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1533 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
1534 0 /* dev_t */, cifs_sb->local_nls,
1535 cifs_sb->mnt_cifs_flags &
1536 CIFS_MOUNT_MAP_SPECIAL_CHR);
1537 else if (attrs->ia_valid & ATTR_MODE) {
1539 #ifdef CONFIG_CIFS_EXPERIMENTAL
1540 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
1541 rc = mode_to_acl(direntry->d_inode, full_path, mode);
1542 else if ((mode & S_IWUGO) == 0) {
1544 if ((mode & S_IWUGO) == 0) {
1547 if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
1549 time_buf.Attributes =
1550 cpu_to_le32(cifsInode->cifsAttrs |
1553 } else if (cifsInode->cifsAttrs & ATTR_READONLY) {
1554 /* If file is readonly on server, we would
1555 not be able to write to it - so if any write
1556 bit is enabled for user or group or other we
1557 need to at least try to remove r/o dos attr */
1559 time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs &
1561 /* Windows ignores set to zero */
1562 if (time_buf.Attributes == 0)
1563 time_buf.Attributes |= cpu_to_le32(ATTR_NORMAL);
1565 #ifdef CONFIG_CIFS_EXPERIMENTAL
1566 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
1567 mode_to_acl(direntry->d_inode, full_path, mode);
1571 if (attrs->ia_valid & ATTR_ATIME) {
1573 time_buf.LastAccessTime =
1574 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1576 time_buf.LastAccessTime = 0;
1578 if (attrs->ia_valid & ATTR_MTIME) {
1580 time_buf.LastWriteTime =
1581 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1583 time_buf.LastWriteTime = 0;
1584 /* Do not set ctime explicitly unless other time
1585 stamps are changed explicitly (i.e. by utime()
1586 since we would then have a mix of client and
1589 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1591 /* Although Samba throws this field away
1592 it may be useful to Windows - but we do
1593 not want to set ctime unless some other
1594 timestamp is changing */
1595 cFYI(1, ("CIFS - CTIME changed"));
1596 time_buf.ChangeTime =
1597 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1599 time_buf.ChangeTime = 0;
1601 if (set_time || set_dosattr) {
1602 time_buf.CreationTime = 0; /* do not change */
1603 /* In the future we should experiment - try setting timestamps
1604 via Handle (SetFileInfo) instead of by path */
1605 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1606 rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
1608 cifs_sb->mnt_cifs_flags &
1609 CIFS_MOUNT_MAP_SPECIAL_CHR);
1613 if (rc == -EOPNOTSUPP) {
1617 cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1618 "times not supported by this server"));
1619 /* BB we could scan to see if we already have it open
1620 and pass in pid of opener to function */
1621 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1622 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1623 CREATE_NOT_DIR, &netfid, &oplock,
1624 NULL, cifs_sb->local_nls,
1625 cifs_sb->mnt_cifs_flags &
1626 CIFS_MOUNT_MAP_SPECIAL_CHR);
1628 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1630 CIFSSMBClose(xid, pTcon, netfid);
1632 /* BB For even older servers we could convert time_buf
1633 into old DOS style which uses two second
1636 /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1637 &time_buf, cifs_sb->local_nls); */
1640 /* Even if error on time set, no sense failing the call if
1641 the server would set the time to a reasonable value anyway,
1642 and this check ensures that we are not being called from
1643 sys_utimes in which case we ought to fail the call back to
1644 the user when the server rejects the call */
1645 if ((rc) && (attrs->ia_valid &
1646 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1650 /* do not need local check to inode_check_ok since the server does
1653 rc = inode_setattr(direntry->d_inode, attrs);
1661 void cifs_delete_inode(struct inode *inode)
1663 cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1664 /* may have to add back in if and when safe distributed caching of
1665 directories added e.g. via FindNotify */