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"
32 int cifs_get_inode_info_unix(struct inode **pinode,
33 const unsigned char *search_path, struct super_block *sb, int xid)
36 FILE_UNIX_BASIC_INFO findData;
37 struct cifsTconInfo *pTcon;
39 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
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,
53 kmalloc(strnlen(pTcon->treeName,
55 strnlen(search_path, MAX_PATHCONF) + 1,
60 /* have to skip first of the double backslash of
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,
67 cifs_sb->mnt_cifs_flags &
68 CIFS_MOUNT_MAP_SPECIAL_CHR);
71 /* BB fix up inode etc. */
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);
82 if (*pinode == NULL) {
83 *pinode = new_inode(sb);
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) {
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;
96 insert_inode_hash(*pinode);
100 cifsInfo = CIFS_I(inode);
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);
109 cifs_NTtimeToUnix(le64_to_cpu(findData.LastAccessTime));
111 cifs_NTtimeToUnix(le64_to_cpu
112 (findData.LastModificationTime));
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;
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));
143 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
144 inode->i_uid = cifs_sb->mnt_uid;
146 inode->i_uid = le64_to_cpu(findData.Uid);
148 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
149 inode->i_gid = cifs_sb->mnt_gid;
151 inode->i_gid = le64_to_cpu(findData.Gid);
153 inode->i_nlink = le64_to_cpu(findData.Nlinks);
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);
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;*/
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 */
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;
174 spin_unlock(&inode->i_lock);
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)
187 &cifs_file_direct_nobrl_ops;
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;
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;
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 */
210 cFYI(1, ("Init special inode"));
211 init_special_inode(inode, inode->i_mode,
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)
225 struct cifsTconInfo *pTcon = cifs_sb->tcon;
227 unsigned int bytes_read;
233 inode->i_mode |= S_IFIFO;
235 } else if (size < 8) {
236 return -EINVAL; /* EOPNOTSUPP? */
239 rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ,
240 CREATE_NOT_DIR, &netfid, &oplock, NULL,
242 cifs_sb->mnt_cifs_flags &
243 CIFS_MOUNT_MAP_SPECIAL_CHR);
245 int buf_type = CIFS_NO_BUFFER;
247 rc = CIFSSMBRead(xid, pTcon,
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);
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);
274 } else if (memcmp("IntxLNK", pbuf, 7) == 0) {
275 cFYI(1, ("Symlink"));
276 inode->i_mode |= S_IFLNK;
278 inode->i_mode |= S_IFREG; /* file? */
282 inode->i_mode |= S_IFREG; /* then it is a file */
283 rc = -EOPNOTSUPP; /* or some unknown SFU type */
285 CIFSSMBClose(xid, pTcon, netfid);
290 #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
292 static int get_sfu_mode(struct inode *inode,
293 const unsigned char *path,
294 struct cifs_sb_info *cifs_sb, int xid)
296 #ifdef CONFIG_CIFS_XATTR
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);
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));
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)
326 struct cifsTconInfo *pTcon;
328 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
331 int adjustTZ = FALSE;
333 pTcon = cifs_sb->tcon;
334 cFYI(1, ("Getting info on %s", search_path));
336 if ((pfindData == NULL) && (*pinode != NULL)) {
337 if (CIFS_I(*pinode)->clientCanCacheRead) {
338 cFYI(1, ("No need to revalidate cached inode sizes"));
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);
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,
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);
365 /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
367 if (rc == -EREMOTE) {
372 strnlen(search_path, MAX_PATHCONF) + 1,
374 if (tmp_path == NULL) {
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,
384 cifs_sb->mnt_cifs_flags &
385 CIFS_MOUNT_MAP_SPECIAL_CHR);
387 /* BB fix up inode etc. */
393 struct cifsInodeInfo *cifsInfo;
394 __u32 attr = le32_to_cpu(pfindData->Attributes);
397 if (*pinode == NULL) {
398 *pinode = new_inode(sb);
399 if (*pinode == NULL) {
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? */
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
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? */
418 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
422 rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
423 search_path, &inode_num,
425 cifs_sb->mnt_cifs_flags &
426 CIFS_MOUNT_MAP_SPECIAL_CHR);
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);
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));
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;*/
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;
456 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
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;
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
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
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),
494 cFYI(1, ("Unrecognized sfu inode type"));
496 cFYI(1, ("sfu mode 0%o", inode->i_mode));
498 inode->i_mode |= S_IFREG;
499 /* treat the dos attribute of read-only as read-only
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? */
513 spin_lock(&inode->i_lock);
514 if (is_size_safe_to_change(cifsInfo,
515 le64_to_cpu(pfindData->EndOfFile))) {
516 /* can not safely shrink the file size here if the
517 client is writing to it due to potential races */
518 i_size_write(inode, le64_to_cpu(pfindData->EndOfFile));
520 /* 512 bytes (2**9) is the fake blocksize that must be
521 used for this calculation */
522 inode->i_blocks = (512 - 1 + le64_to_cpu(
523 pfindData->AllocationSize)) >> 9;
525 spin_unlock(&inode->i_lock);
527 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
529 /* BB fill in uid and gid here? with help from winbind?
530 or retrieve from NTFS stream extended attribute */
531 #ifdef CONFIG_CIFS_EXPERIMENTAL
532 /* fill in 0777 bits from ACL */
533 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
534 cFYI(1, ("Getting mode bits from ACL"));
535 acl_to_uid_mode(inode, search_path);
538 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
539 /* fill in remaining high mode bits e.g. SUID, VTX */
540 get_sfu_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);
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)
555 &cifs_file_direct_nobrl_ops;
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;
563 if (pTcon->ses->server->maxBuf <
564 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
565 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
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;
576 init_special_inode(inode, inode->i_mode,
584 static const struct inode_operations cifs_ipc_inode_ops = {
585 .lookup = cifs_lookup,
588 /* gets root inode */
589 void cifs_read_inode(struct inode *inode)
592 struct cifs_sb_info *cifs_sb;
594 cifs_sb = CIFS_SB(inode->i_sb);
597 if (cifs_sb->tcon->unix_ext)
598 rc = cifs_get_inode_info_unix(&inode, "", inode->i_sb, xid);
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;
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;
611 /* can not call macro FreeXid here since in a void func */
615 int cifs_unlink(struct inode *inode, struct dentry *direntry)
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;
625 cFYI(1, ("cifs_unlink, inode = 0x%p", inode));
630 cifs_sb = CIFS_SB(inode->i_sb);
632 cifs_sb = CIFS_SB(direntry->d_sb);
633 pTcon = cifs_sb->tcon;
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) {
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;
656 rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
657 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
660 if (direntry->d_inode)
661 drop_nlink(direntry->d_inode);
662 } else if (rc == -ENOENT) {
664 } else if (rc == -ETXTBSY) {
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);
674 CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
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);
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);
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,
692 cifs_sb->mnt_cifs_flags &
693 CIFS_MOUNT_MAP_SPECIAL_CHR);
697 if (rc == -EOPNOTSUPP) {
700 /* rc = CIFSSMBSetAttrLegacy(xid, pTcon,
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
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,
716 cifs_sb->mnt_cifs_flags &
717 CIFS_MOUNT_MAP_SPECIAL_CHR);
719 rc = CIFSSMBSetFileTimes(xid, pTcon,
722 CIFSSMBClose(xid, pTcon, netfid);
728 rc = CIFSSMBDelFile(xid, pTcon, full_path,
730 cifs_sb->mnt_cifs_flags &
731 CIFS_MOUNT_MAP_SPECIAL_CHR);
733 if (direntry->d_inode)
734 drop_nlink(direntry->d_inode);
735 } else if (rc == -ETXTBSY) {
739 rc = CIFSSMBOpen(xid, pTcon, full_path,
742 CREATE_DELETE_ON_CLOSE,
743 &netfid, &oplock, NULL,
745 cifs_sb->mnt_cifs_flags &
746 CIFS_MOUNT_MAP_SPECIAL_CHR);
748 CIFSSMBRenameOpenFile(xid, pTcon,
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);
757 /* BB if rc = -ETXTBUSY goto the rename logic BB */
761 if (direntry->d_inode) {
762 cifsInode = CIFS_I(direntry->d_inode);
763 cifsInode->time = 0; /* will force revalidate to get info
765 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
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 */
778 static void posix_fill_in_inode(struct inode *tmp_inode,
779 FILE_UNIX_BASIC_INFO *pData, int *pobject_type, int isNewInode)
782 struct timespec local_mtime;
784 struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
785 struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
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);
793 /* save mtime and size */
794 local_mtime = tmp_inode->i_mtime;
795 local_size = tmp_inode->i_size;
798 cifs_NTtimeToUnix(le64_to_cpu(pData->LastAccessTime));
800 cifs_NTtimeToUnix(le64_to_cpu(pData->LastModificationTime));
802 cifs_NTtimeToUnix(le64_to_cpu(pData->LastStatusChange));
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;
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));
840 #ifdef CONFIG_CIFS_DEBUG2
841 cFYI(1, ("object type: %d", type));
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);
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);
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;
857 spin_unlock(&tmp_inode->i_lock);
859 if (S_ISREG(tmp_inode->i_mode)) {
860 cFYI(1, ("File inode"));
861 tmp_inode->i_op = &cifs_file_inode_ops;
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;
867 tmp_inode->i_fop = &cifs_file_direct_ops;
869 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
870 tmp_inode->i_fop = &cifs_file_nobrl_ops;
872 tmp_inode->i_fop = &cifs_file_ops;
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;
879 tmp_inode->i_data.a_ops = &cifs_addr_ops;
882 return; /* No sense invalidating pages for new inode
883 since we we have not started caching
884 readahead file data yet */
886 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
887 (local_size == tmp_inode->i_size)) {
888 cFYI(1, ("inode exists but unchanged"));
890 /* file may have changed on server */
891 cFYI(1, ("invalidate inode, readdir detected change"));
892 invalidate_remote_inode(tmp_inode);
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 */
903 cFYI(1, ("Special inode"));
904 init_special_inode(tmp_inode, tmp_inode->i_mode,
909 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
913 struct cifs_sb_info *cifs_sb;
914 struct cifsTconInfo *pTcon;
915 char *full_path = NULL;
916 struct inode *newinode = NULL;
918 cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
922 cifs_sb = CIFS_SB(inode->i_sb);
923 pTcon = cifs_sb->tcon;
925 full_path = build_path_from_dentry(direntry);
926 if (full_path == NULL) {
931 if ((pTcon->ses->capabilities & CAP_UNIX) &&
932 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
933 le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
935 FILE_UNIX_BASIC_INFO *pInfo =
936 kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
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) {
950 goto mkdir_retry_old;
952 cFYI(1, ("posix mkdir returned 0x%x", rc));
956 if (pInfo->Type == cpu_to_le32(-1)) {
957 /* no return info, go query for it */
961 /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
965 direntry->d_op = &cifs_ci_dentry_ops;
967 direntry->d_op = &cifs_dentry_ops;
969 newinode = new_inode(inode->i_sb);
970 if (newinode == NULL) {
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) {
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;
985 insert_inode_hash(newinode);
986 d_instantiate(direntry, newinode);
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));
996 if (newinode->i_nlink != 2)
997 cFYI(1, ("unexpected number of links %d",
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);
1009 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
1014 if (pTcon->unix_ext)
1015 rc = cifs_get_inode_info_unix(&newinode, full_path,
1018 rc = cifs_get_inode_info(&newinode, full_path, NULL,
1022 direntry->d_op = &cifs_ci_dentry_ops;
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,
1035 (__u64)current->fsuid,
1036 (__u64)current->fsgid,
1039 cifs_sb->mnt_cifs_flags &
1040 CIFS_MOUNT_MAP_SPECIAL_CHR);
1042 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1044 (__u64)-1, 0 /* dev_t */,
1046 cifs_sb->mnt_cifs_flags &
1047 CIFS_MOUNT_MAP_SPECIAL_CHR);
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 =
1060 direntry->d_inode->i_gid =
1072 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1076 struct cifs_sb_info *cifs_sb;
1077 struct cifsTconInfo *pTcon;
1078 char *full_path = NULL;
1079 struct cifsInodeInfo *cifsInode;
1081 cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
1085 cifs_sb = CIFS_SB(inode->i_sb);
1086 pTcon = cifs_sb->tcon;
1088 full_path = build_path_from_dentry(direntry);
1089 if (full_path == NULL) {
1094 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1095 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
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);
1105 cifsInode = CIFS_I(direntry->d_inode);
1106 cifsInode->time = 0; /* force revalidate to go get info when
1108 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1109 current_fs_time(inode->i_sb);
1116 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
1117 struct inode *target_inode, struct dentry *target_direntry)
1121 struct cifs_sb_info *cifs_sb_source;
1122 struct cifs_sb_info *cifs_sb_target;
1123 struct cifsTconInfo *pTcon;
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;
1133 if (pTcon != cifs_sb_target->tcon) {
1135 return -EXDEV; /* BB actually could be allowed if same server,
1136 but different share.
1137 Might eventually add support for this */
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)) {
1146 goto cifs_rename_exit;
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
1156 FILE_UNIX_BASIC_INFO *info_buf_source;
1157 FILE_UNIX_BASIC_INFO *info_buf_target;
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,
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 */
1172 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
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);
1180 (info_buf_source->UniqueId ==
1181 info_buf_target->UniqueId)) {
1182 /* do not rename since the files are hardlinked which
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
1190 cifs_unlink(target_inode, target_direntry);
1191 rc = CIFSSMBRename(xid, pTcon, fromName,
1193 cifs_sb_source->local_nls,
1194 cifs_sb_source->mnt_cifs_flags
1195 & CIFS_MOUNT_MAP_SPECIAL_CHR);
1197 kfree(info_buf_source);
1198 } /* if we can not get memory just leave rc as EEXIST */
1202 cFYI(1, ("rename rc %d", rc));
1204 if ((rc == -EIO) || (rc == -EEXIST)) {
1208 /* BB FIXME Is Generic Read correct for rename? */
1209 /* if renaming directory - we should not say CREATE_NOT_DIR,
1210 need to test renaming open directory, also GENERIC_READ
1211 might not right be right access to request */
1212 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
1213 CREATE_NOT_DIR, &netfid, &oplock, NULL,
1214 cifs_sb_source->local_nls,
1215 cifs_sb_source->mnt_cifs_flags &
1216 CIFS_MOUNT_MAP_SPECIAL_CHR);
1218 rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
1219 cifs_sb_source->local_nls,
1220 cifs_sb_source->mnt_cifs_flags &
1221 CIFS_MOUNT_MAP_SPECIAL_CHR);
1222 CIFSSMBClose(xid, pTcon, netfid);
1233 int cifs_revalidate(struct dentry *direntry)
1236 int rc = 0, wbrc = 0;
1238 struct cifs_sb_info *cifs_sb;
1239 struct cifsInodeInfo *cifsInode;
1241 struct timespec local_mtime;
1242 int invalidate_inode = FALSE;
1244 if (direntry->d_inode == NULL)
1247 cifsInode = CIFS_I(direntry->d_inode);
1249 if (cifsInode == NULL)
1252 /* no sense revalidating inode info on file that no one can write */
1253 if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
1258 cifs_sb = CIFS_SB(direntry->d_sb);
1260 /* can not safely grab the rename sem here if rename calls revalidate
1261 since that would deadlock */
1262 full_path = build_path_from_dentry(direntry);
1263 if (full_path == NULL) {
1267 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1268 "jiffies %ld", full_path, direntry->d_inode,
1269 direntry->d_inode->i_count.counter, direntry,
1270 direntry->d_time, jiffies));
1272 if (cifsInode->time == 0) {
1273 /* was set to zero previously to force revalidate */
1274 } else if (time_before(jiffies, cifsInode->time + HZ) &&
1275 lookupCacheEnabled) {
1276 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1277 (direntry->d_inode->i_nlink == 1)) {
1282 cFYI(1, ("Have to revalidate file due to hardlinks"));
1286 /* save mtime and size */
1287 local_mtime = direntry->d_inode->i_mtime;
1288 local_size = direntry->d_inode->i_size;
1290 if (cifs_sb->tcon->unix_ext) {
1291 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1292 direntry->d_sb, xid);
1294 cFYI(1, ("error on getting revalidate info %d", rc));
1295 /* if (rc != -ENOENT)
1296 rc = 0; */ /* BB should we cache info on
1300 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1301 direntry->d_sb, xid);
1303 cFYI(1, ("error on getting revalidate info %d", rc));
1304 /* if (rc != -ENOENT)
1305 rc = 0; */ /* BB should we cache info on
1309 /* should we remap certain errors, access denied?, to zero */
1311 /* if not oplocked, we invalidate inode pages if mtime or file size
1312 had changed on server */
1314 if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) &&
1315 (local_size == direntry->d_inode->i_size)) {
1316 cFYI(1, ("cifs_revalidate - inode unchanged"));
1318 /* file may have changed on server */
1319 if (cifsInode->clientCanCacheRead) {
1320 /* no need to invalidate inode pages since we were the
1321 only ones who could have modified the file and the
1322 server copy is staler than ours */
1324 invalidate_inode = TRUE;
1328 /* can not grab this sem since kernel filesys locking documentation
1329 indicates i_mutex may be taken by the kernel on lookup and rename
1330 which could deadlock if we grab the i_mutex here as well */
1331 /* mutex_lock(&direntry->d_inode->i_mutex);*/
1332 /* need to write out dirty pages here */
1333 if (direntry->d_inode->i_mapping) {
1334 /* do we need to lock inode until after invalidate completes
1336 wbrc = filemap_fdatawrite(direntry->d_inode->i_mapping);
1338 CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1340 if (invalidate_inode) {
1341 /* shrink_dcache not necessary now that cifs dentry ops
1342 are exported for negative dentries */
1343 /* if (S_ISDIR(direntry->d_inode->i_mode))
1344 shrink_dcache_parent(direntry); */
1345 if (S_ISREG(direntry->d_inode->i_mode)) {
1346 if (direntry->d_inode->i_mapping)
1347 wbrc = filemap_fdatawait(direntry->d_inode->i_mapping);
1349 CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1350 /* may eventually have to do this for open files too */
1351 if (list_empty(&(cifsInode->openFileList))) {
1352 /* changed on server - flush read ahead pages */
1353 cFYI(1, ("Invalidating read ahead data on "
1355 invalidate_remote_inode(direntry->d_inode);
1359 /* mutex_unlock(&direntry->d_inode->i_mutex); */
1366 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1369 int err = cifs_revalidate(dentry);
1371 generic_fillattr(dentry->d_inode, stat);
1372 stat->blksize = CIFS_MAX_MSGSIZE;
1377 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1379 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1380 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1384 page = grab_cache_page(mapping, index);
1388 zero_user_segment(page, offset, PAGE_CACHE_SIZE);
1390 page_cache_release(page);
1394 static int cifs_vmtruncate(struct inode *inode, loff_t offset)
1396 struct address_space *mapping = inode->i_mapping;
1397 unsigned long limit;
1399 spin_lock(&inode->i_lock);
1400 if (inode->i_size < offset)
1403 * truncation of in-use swapfiles is disallowed - it would cause
1404 * subsequent swapout to scribble on the now-freed blocks.
1406 if (IS_SWAPFILE(inode)) {
1407 spin_unlock(&inode->i_lock);
1410 i_size_write(inode, offset);
1411 spin_unlock(&inode->i_lock);
1413 * unmap_mapping_range is called twice, first simply for efficiency
1414 * so that truncate_inode_pages does fewer single-page unmaps. However
1415 * after this first call, and before truncate_inode_pages finishes,
1416 * it is possible for private pages to be COWed, which remain after
1417 * truncate_inode_pages finishes, hence the second unmap_mapping_range
1418 * call must be made for correctness.
1420 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1421 truncate_inode_pages(mapping, offset);
1422 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1426 limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
1427 if (limit != RLIM_INFINITY && offset > limit) {
1428 spin_unlock(&inode->i_lock);
1431 if (offset > inode->i_sb->s_maxbytes) {
1432 spin_unlock(&inode->i_lock);
1435 i_size_write(inode, offset);
1436 spin_unlock(&inode->i_lock);
1438 if (inode->i_op && inode->i_op->truncate)
1439 inode->i_op->truncate(inode);
1442 send_sig(SIGXFSZ, current, 0);
1449 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1452 struct cifs_sb_info *cifs_sb;
1453 struct cifsTconInfo *pTcon;
1454 char *full_path = NULL;
1456 struct cifsFileInfo *open_file = NULL;
1457 FILE_BASIC_INFO time_buf;
1458 int set_time = FALSE;
1459 int set_dosattr = FALSE;
1460 __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1461 __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1462 __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1463 struct cifsInodeInfo *cifsInode;
1467 cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1468 direntry->d_name.name, attrs->ia_valid));
1470 cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
1471 pTcon = cifs_sb->tcon;
1473 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1474 /* check if we have permission to change attrs */
1475 rc = inode_change_ok(direntry->d_inode, attrs);
1483 full_path = build_path_from_dentry(direntry);
1484 if (full_path == NULL) {
1488 cifsInode = CIFS_I(direntry->d_inode);
1490 /* BB check if we need to refresh inode from server now ? BB */
1492 if (attrs->ia_valid & ATTR_SIZE) {
1494 Flush data before changing file size on server. If the
1495 flush returns error, store it to report later and continue.
1496 BB: This should be smarter. Why bother flushing pages that
1497 will be truncated anyway? Also, should we error out here if
1498 the flush returns error?
1500 rc = filemap_write_and_wait(direntry->d_inode->i_mapping);
1502 CIFS_I(direntry->d_inode)->write_behind_rc = rc;
1506 /* To avoid spurious oplock breaks from server, in the case of
1507 inodes that we already have open, avoid doing path based
1508 setting of file size if we can do it by handle.
1509 This keeps our caching token (oplock) and avoids timeouts
1510 when the local oplock break takes longer to flush
1511 writebehind data than the SMB timeout for the SetPathInfo
1512 request would allow */
1514 open_file = find_writable_file(cifsInode);
1516 __u16 nfid = open_file->netfid;
1517 __u32 npid = open_file->pid;
1518 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1520 atomic_dec(&open_file->wrtPending);
1521 cFYI(1, ("SetFSize for attrs rc = %d", rc));
1522 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1523 unsigned int bytes_written;
1524 rc = CIFSSMBWrite(xid, pTcon,
1525 nfid, 0, attrs->ia_size,
1526 &bytes_written, NULL, NULL,
1527 1 /* 45 seconds */);
1528 cFYI(1, ("Wrt seteof rc %d", rc));
1534 /* Set file size by pathname rather than by handle
1535 either because no valid, writeable file handle for
1536 it was found or because there was an error setting
1538 rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1539 attrs->ia_size, FALSE,
1541 cifs_sb->mnt_cifs_flags &
1542 CIFS_MOUNT_MAP_SPECIAL_CHR);
1543 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1544 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1548 rc = SMBLegacyOpen(xid, pTcon, full_path,
1550 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1551 CREATE_NOT_DIR, &netfid, &oplock,
1552 NULL, cifs_sb->local_nls,
1553 cifs_sb->mnt_cifs_flags &
1554 CIFS_MOUNT_MAP_SPECIAL_CHR);
1556 unsigned int bytes_written;
1557 rc = CIFSSMBWrite(xid, pTcon,
1560 &bytes_written, NULL,
1561 NULL, 1 /* 45 sec */);
1562 cFYI(1, ("wrt seteof rc %d", rc));
1563 CIFSSMBClose(xid, pTcon, netfid);
1569 /* Server is ok setting allocation size implicitly - no need
1571 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1572 cifs_sb->local_nls);
1576 rc = cifs_vmtruncate(direntry->d_inode, attrs->ia_size);
1577 cifs_truncate_page(direntry->d_inode->i_mapping,
1578 direntry->d_inode->i_size);
1580 goto cifs_setattr_exit;
1582 if (attrs->ia_valid & ATTR_UID) {
1583 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1584 uid = attrs->ia_uid;
1586 if (attrs->ia_valid & ATTR_GID) {
1587 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1588 gid = attrs->ia_gid;
1591 time_buf.Attributes = 0;
1593 /* skip mode change if it's just for clearing setuid/setgid */
1594 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1595 attrs->ia_valid &= ~ATTR_MODE;
1597 if (attrs->ia_valid & ATTR_MODE) {
1598 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1599 mode = attrs->ia_mode;
1602 if ((pTcon->unix_ext)
1603 && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1604 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
1605 0 /* dev_t */, cifs_sb->local_nls,
1606 cifs_sb->mnt_cifs_flags &
1607 CIFS_MOUNT_MAP_SPECIAL_CHR);
1608 else if (attrs->ia_valid & ATTR_MODE) {
1610 #ifdef CONFIG_CIFS_EXPERIMENTAL
1611 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
1612 rc = mode_to_acl(direntry->d_inode, full_path, mode);
1613 else if ((mode & S_IWUGO) == 0) {
1615 if ((mode & S_IWUGO) == 0) {
1618 if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
1620 time_buf.Attributes =
1621 cpu_to_le32(cifsInode->cifsAttrs |
1624 } else if (cifsInode->cifsAttrs & ATTR_READONLY) {
1625 /* If file is readonly on server, we would
1626 not be able to write to it - so if any write
1627 bit is enabled for user or group or other we
1628 need to at least try to remove r/o dos attr */
1630 time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs &
1632 /* Windows ignores set to zero */
1633 if (time_buf.Attributes == 0)
1634 time_buf.Attributes |= cpu_to_le32(ATTR_NORMAL);
1636 #ifdef CONFIG_CIFS_EXPERIMENTAL
1637 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
1638 mode_to_acl(direntry->d_inode, full_path, mode);
1642 if (attrs->ia_valid & ATTR_ATIME) {
1644 time_buf.LastAccessTime =
1645 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1647 time_buf.LastAccessTime = 0;
1649 if (attrs->ia_valid & ATTR_MTIME) {
1651 time_buf.LastWriteTime =
1652 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1654 time_buf.LastWriteTime = 0;
1655 /* Do not set ctime explicitly unless other time
1656 stamps are changed explicitly (i.e. by utime()
1657 since we would then have a mix of client and
1660 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1662 /* Although Samba throws this field away
1663 it may be useful to Windows - but we do
1664 not want to set ctime unless some other
1665 timestamp is changing */
1666 cFYI(1, ("CIFS - CTIME changed"));
1667 time_buf.ChangeTime =
1668 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1670 time_buf.ChangeTime = 0;
1672 if (set_time || set_dosattr) {
1673 time_buf.CreationTime = 0; /* do not change */
1674 /* In the future we should experiment - try setting timestamps
1675 via Handle (SetFileInfo) instead of by path */
1676 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1677 rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
1679 cifs_sb->mnt_cifs_flags &
1680 CIFS_MOUNT_MAP_SPECIAL_CHR);
1684 if (rc == -EOPNOTSUPP) {
1688 cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1689 "times not supported by this server"));
1690 /* BB we could scan to see if we already have it open
1691 and pass in pid of opener to function */
1692 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1693 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1694 CREATE_NOT_DIR, &netfid, &oplock,
1695 NULL, cifs_sb->local_nls,
1696 cifs_sb->mnt_cifs_flags &
1697 CIFS_MOUNT_MAP_SPECIAL_CHR);
1699 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1701 CIFSSMBClose(xid, pTcon, netfid);
1703 /* BB For even older servers we could convert time_buf
1704 into old DOS style which uses two second
1707 /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1708 &time_buf, cifs_sb->local_nls); */
1711 /* Even if error on time set, no sense failing the call if
1712 the server would set the time to a reasonable value anyway,
1713 and this check ensures that we are not being called from
1714 sys_utimes in which case we ought to fail the call back to
1715 the user when the server rejects the call */
1716 if ((rc) && (attrs->ia_valid &
1717 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1721 /* do not need local check to inode_check_ok since the server does
1724 rc = inode_setattr(direntry->d_inode, attrs);
1732 void cifs_delete_inode(struct inode *inode)
1734 cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1735 /* may have to add back in if and when safe distributed caching of
1736 directories added e.g. via FindNotify */