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,
57 if (tmp_path == NULL) {
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_uid_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, le64_to_cpu(pfindData->EndOfFile))) {
515 /* can not safely shrink the file size here if the
516 client is writing to it due to potential races */
517 i_size_write(inode, le64_to_cpu(pfindData->EndOfFile));
519 /* 512 bytes (2**9) is the fake blocksize that must be
520 used for this calculation */
521 inode->i_blocks = (512 - 1 + le64_to_cpu(
522 pfindData->AllocationSize)) >> 9;
524 spin_unlock(&inode->i_lock);
526 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
528 /* BB fill in uid and gid here? with help from winbind?
529 or retrieve from NTFS stream extended attribute */
530 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
531 /* fill in uid, gid, mode from server ACL */
532 /* BB FIXME this should also take into account the
533 * default uid specified on mount if present */
534 get_sfu_uid_mode(inode, search_path, cifs_sb, xid);
535 } else if (atomic_read(&cifsInfo->inUse) == 0) {
536 inode->i_uid = cifs_sb->mnt_uid;
537 inode->i_gid = cifs_sb->mnt_gid;
538 /* set so we do not keep refreshing these fields with
539 bad data after user has changed them in memory */
540 atomic_set(&cifsInfo->inUse, 1);
543 if (S_ISREG(inode->i_mode)) {
544 cFYI(1, ("File inode"));
545 inode->i_op = &cifs_file_inode_ops;
546 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
547 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
549 &cifs_file_direct_nobrl_ops;
551 inode->i_fop = &cifs_file_direct_ops;
552 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
553 inode->i_fop = &cifs_file_nobrl_ops;
554 else /* not direct, send byte range locks */
555 inode->i_fop = &cifs_file_ops;
557 if (pTcon->ses->server->maxBuf <
558 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
559 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
561 inode->i_data.a_ops = &cifs_addr_ops;
562 } else if (S_ISDIR(inode->i_mode)) {
563 cFYI(1, ("Directory inode"));
564 inode->i_op = &cifs_dir_inode_ops;
565 inode->i_fop = &cifs_dir_ops;
566 } else if (S_ISLNK(inode->i_mode)) {
567 cFYI(1, ("Symbolic Link inode"));
568 inode->i_op = &cifs_symlink_inode_ops;
570 init_special_inode(inode, inode->i_mode,
578 /* gets root inode */
579 void cifs_read_inode(struct inode *inode)
582 struct cifs_sb_info *cifs_sb;
584 cifs_sb = CIFS_SB(inode->i_sb);
586 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
587 cifs_get_inode_info_unix(&inode, "", inode->i_sb, xid);
589 cifs_get_inode_info(&inode, "", NULL, inode->i_sb, xid);
590 /* can not call macro FreeXid here since in a void func */
594 int cifs_unlink(struct inode *inode, struct dentry *direntry)
598 struct cifs_sb_info *cifs_sb;
599 struct cifsTconInfo *pTcon;
600 char *full_path = NULL;
601 struct cifsInodeInfo *cifsInode;
602 FILE_BASIC_INFO *pinfo_buf;
604 cFYI(1, ("cifs_unlink, inode = 0x%p", inode));
609 cifs_sb = CIFS_SB(inode->i_sb);
611 cifs_sb = CIFS_SB(direntry->d_sb);
612 pTcon = cifs_sb->tcon;
614 /* Unlink can be called from rename so we can not grab the sem here
615 since we deadlock otherwise */
616 /* mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/
617 full_path = build_path_from_dentry(direntry);
618 /* mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/
619 if (full_path == NULL) {
624 if ((pTcon->ses->capabilities & CAP_UNIX) &&
625 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
626 le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
627 rc = CIFSPOSIXDelFile(xid, pTcon, full_path,
628 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
629 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
630 cFYI(1, ("posix del rc %d", rc));
631 if ((rc == 0) || (rc == -ENOENT))
632 goto psx_del_no_retry;
635 rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
636 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
639 if (direntry->d_inode)
640 drop_nlink(direntry->d_inode);
641 } else if (rc == -ENOENT) {
643 } else if (rc == -ETXTBSY) {
647 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
648 CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
649 &netfid, &oplock, NULL, cifs_sb->local_nls,
650 cifs_sb->mnt_cifs_flags &
651 CIFS_MOUNT_MAP_SPECIAL_CHR);
653 CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
655 cifs_sb->mnt_cifs_flags &
656 CIFS_MOUNT_MAP_SPECIAL_CHR);
657 CIFSSMBClose(xid, pTcon, netfid);
658 if (direntry->d_inode)
659 drop_nlink(direntry->d_inode);
661 } else if (rc == -EACCES) {
662 /* try only if r/o attribute set in local lookup data? */
663 pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
665 /* ATTRS set to normal clears r/o bit */
666 pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
667 if (!(pTcon->ses->flags & CIFS_SES_NT4))
668 rc = CIFSSMBSetTimes(xid, pTcon, full_path,
671 cifs_sb->mnt_cifs_flags &
672 CIFS_MOUNT_MAP_SPECIAL_CHR);
676 if (rc == -EOPNOTSUPP) {
679 /* rc = CIFSSMBSetAttrLegacy(xid, pTcon,
683 For some strange reason it seems that NT4 eats the
684 old setattr call without actually setting the
685 attributes so on to the third attempted workaround
688 /* BB could scan to see if we already have it open
689 and pass in pid of opener to function */
690 rc = CIFSSMBOpen(xid, pTcon, full_path,
691 FILE_OPEN, SYNCHRONIZE |
692 FILE_WRITE_ATTRIBUTES, 0,
693 &netfid, &oplock, NULL,
695 cifs_sb->mnt_cifs_flags &
696 CIFS_MOUNT_MAP_SPECIAL_CHR);
698 rc = CIFSSMBSetFileTimes(xid, pTcon,
701 CIFSSMBClose(xid, pTcon, netfid);
707 rc = CIFSSMBDelFile(xid, pTcon, full_path,
709 cifs_sb->mnt_cifs_flags &
710 CIFS_MOUNT_MAP_SPECIAL_CHR);
712 if (direntry->d_inode)
713 drop_nlink(direntry->d_inode);
714 } else if (rc == -ETXTBSY) {
718 rc = CIFSSMBOpen(xid, pTcon, full_path,
721 CREATE_DELETE_ON_CLOSE,
722 &netfid, &oplock, NULL,
724 cifs_sb->mnt_cifs_flags &
725 CIFS_MOUNT_MAP_SPECIAL_CHR);
727 CIFSSMBRenameOpenFile(xid, pTcon,
730 cifs_sb->mnt_cifs_flags &
731 CIFS_MOUNT_MAP_SPECIAL_CHR);
732 CIFSSMBClose(xid, pTcon, netfid);
733 if (direntry->d_inode)
734 drop_nlink(direntry->d_inode);
736 /* BB if rc = -ETXTBUSY goto the rename logic BB */
740 if (direntry->d_inode) {
741 cifsInode = CIFS_I(direntry->d_inode);
742 cifsInode->time = 0; /* will force revalidate to get info
744 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
747 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
748 cifsInode = CIFS_I(inode);
749 cifsInode->time = 0; /* force revalidate of dir as well */
757 static void posix_fill_in_inode(struct inode *tmp_inode,
758 FILE_UNIX_BASIC_INFO *pData, int *pobject_type, int isNewInode)
761 struct timespec local_mtime;
763 struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
764 struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
766 __u32 type = le32_to_cpu(pData->Type);
767 __u64 num_of_bytes = le64_to_cpu(pData->NumOfBytes);
768 __u64 end_of_file = le64_to_cpu(pData->EndOfFile);
769 cifsInfo->time = jiffies;
770 atomic_inc(&cifsInfo->inUse);
772 /* save mtime and size */
773 local_mtime = tmp_inode->i_mtime;
774 local_size = tmp_inode->i_size;
777 cifs_NTtimeToUnix(le64_to_cpu(pData->LastAccessTime));
779 cifs_NTtimeToUnix(le64_to_cpu(pData->LastModificationTime));
781 cifs_NTtimeToUnix(le64_to_cpu(pData->LastStatusChange));
783 tmp_inode->i_mode = le64_to_cpu(pData->Permissions);
784 /* since we set the inode type below we need to mask off type
785 to avoid strange results if bits above were corrupt */
786 tmp_inode->i_mode &= ~S_IFMT;
787 if (type == UNIX_FILE) {
788 *pobject_type = DT_REG;
789 tmp_inode->i_mode |= S_IFREG;
790 } else if (type == UNIX_SYMLINK) {
791 *pobject_type = DT_LNK;
792 tmp_inode->i_mode |= S_IFLNK;
793 } else if (type == UNIX_DIR) {
794 *pobject_type = DT_DIR;
795 tmp_inode->i_mode |= S_IFDIR;
796 } else if (type == UNIX_CHARDEV) {
797 *pobject_type = DT_CHR;
798 tmp_inode->i_mode |= S_IFCHR;
799 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pData->DevMajor),
800 le64_to_cpu(pData->DevMinor) & MINORMASK);
801 } else if (type == UNIX_BLOCKDEV) {
802 *pobject_type = DT_BLK;
803 tmp_inode->i_mode |= S_IFBLK;
804 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pData->DevMajor),
805 le64_to_cpu(pData->DevMinor) & MINORMASK);
806 } else if (type == UNIX_FIFO) {
807 *pobject_type = DT_FIFO;
808 tmp_inode->i_mode |= S_IFIFO;
809 } else if (type == UNIX_SOCKET) {
810 *pobject_type = DT_SOCK;
811 tmp_inode->i_mode |= S_IFSOCK;
813 /* safest to just call it a file */
814 *pobject_type = DT_REG;
815 tmp_inode->i_mode |= S_IFREG;
816 cFYI(1, ("unknown inode type %d", type));
819 #ifdef CONFIG_CIFS_DEBUG2
820 cFYI(1, ("object type: %d", type));
822 tmp_inode->i_uid = le64_to_cpu(pData->Uid);
823 tmp_inode->i_gid = le64_to_cpu(pData->Gid);
824 tmp_inode->i_nlink = le64_to_cpu(pData->Nlinks);
826 spin_lock(&tmp_inode->i_lock);
827 if (is_size_safe_to_change(cifsInfo, end_of_file)) {
828 /* can not safely change the file size here if the
829 client is writing to it due to potential races */
830 i_size_write(tmp_inode, end_of_file);
832 /* 512 bytes (2**9) is the fake blocksize that must be used */
833 /* for this calculation, not the real blocksize */
834 tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
836 spin_unlock(&tmp_inode->i_lock);
838 if (S_ISREG(tmp_inode->i_mode)) {
839 cFYI(1, ("File inode"));
840 tmp_inode->i_op = &cifs_file_inode_ops;
842 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
843 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
844 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
846 tmp_inode->i_fop = &cifs_file_direct_ops;
848 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
849 tmp_inode->i_fop = &cifs_file_nobrl_ops;
851 tmp_inode->i_fop = &cifs_file_ops;
853 if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
854 (cifs_sb->tcon->ses->server->maxBuf <
855 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
856 tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
858 tmp_inode->i_data.a_ops = &cifs_addr_ops;
861 return; /* No sense invalidating pages for new inode
862 since we we have not started caching
863 readahead file data yet */
865 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
866 (local_size == tmp_inode->i_size)) {
867 cFYI(1, ("inode exists but unchanged"));
869 /* file may have changed on server */
870 cFYI(1, ("invalidate inode, readdir detected change"));
871 invalidate_remote_inode(tmp_inode);
873 } else if (S_ISDIR(tmp_inode->i_mode)) {
874 cFYI(1, ("Directory inode"));
875 tmp_inode->i_op = &cifs_dir_inode_ops;
876 tmp_inode->i_fop = &cifs_dir_ops;
877 } else if (S_ISLNK(tmp_inode->i_mode)) {
878 cFYI(1, ("Symbolic Link inode"));
879 tmp_inode->i_op = &cifs_symlink_inode_ops;
880 /* tmp_inode->i_fop = *//* do not need to set to anything */
882 cFYI(1, ("Special inode"));
883 init_special_inode(tmp_inode, tmp_inode->i_mode,
888 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
892 struct cifs_sb_info *cifs_sb;
893 struct cifsTconInfo *pTcon;
894 char *full_path = NULL;
895 struct inode *newinode = NULL;
897 cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
901 cifs_sb = CIFS_SB(inode->i_sb);
902 pTcon = cifs_sb->tcon;
904 full_path = build_path_from_dentry(direntry);
905 if (full_path == NULL) {
910 if ((pTcon->ses->capabilities & CAP_UNIX) &&
911 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
912 le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
914 FILE_UNIX_BASIC_INFO * pInfo =
915 kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
921 rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT,
922 mode, NULL /* netfid */, pInfo, &oplock,
923 full_path, cifs_sb->local_nls,
924 cifs_sb->mnt_cifs_flags &
925 CIFS_MOUNT_MAP_SPECIAL_CHR);
927 cFYI(1, ("posix mkdir returned 0x%x", rc));
931 if (pInfo->Type == -1) /* no return info - go query */
933 /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
937 direntry->d_op = &cifs_ci_dentry_ops;
939 direntry->d_op = &cifs_dentry_ops;
941 newinode = new_inode(inode->i_sb);
942 if (newinode == NULL)
944 /* Is an i_ino of zero legal? */
945 /* Are there sanity checks we can use to ensure that
946 the server is really filling in that field? */
947 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
949 (unsigned long)pInfo->UniqueId;
950 } /* note ino incremented to unique num in new_inode */
951 if (inode->i_sb->s_flags & MS_NOATIME)
952 newinode->i_flags |= S_NOATIME | S_NOCMTIME;
953 newinode->i_nlink = 2;
955 insert_inode_hash(newinode);
956 d_instantiate(direntry, newinode);
958 /* we already checked in POSIXCreate whether
959 frame was long enough */
960 posix_fill_in_inode(direntry->d_inode,
961 pInfo, &obj_type, 1 /* NewInode */);
962 #ifdef CONFIG_CIFS_DEBUG2
963 cFYI(1, ("instantiated dentry %p %s to inode %p",
964 direntry, direntry->d_name.name, newinode));
966 if (newinode->i_nlink != 2)
967 cFYI(1, ("unexpected number of links %d",
975 /* BB add setting the equivalent of mode via CreateX w/ACLs */
976 rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
977 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
979 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
984 if (pTcon->ses->capabilities & CAP_UNIX)
985 rc = cifs_get_inode_info_unix(&newinode, full_path,
988 rc = cifs_get_inode_info(&newinode, full_path, NULL,
992 direntry->d_op = &cifs_ci_dentry_ops;
994 direntry->d_op = &cifs_dentry_ops;
995 d_instantiate(direntry, newinode);
996 /* setting nlink not necessary except in cases where we
997 * failed to get it from the server or was set bogus */
998 if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
999 direntry->d_inode->i_nlink = 2;
1000 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX) {
1001 mode &= ~current->fs->umask;
1002 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1003 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1005 (__u64)current->fsuid,
1006 (__u64)current->fsgid,
1009 cifs_sb->mnt_cifs_flags &
1010 CIFS_MOUNT_MAP_SPECIAL_CHR);
1012 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1014 (__u64)-1, 0 /* dev_t */,
1016 cifs_sb->mnt_cifs_flags &
1017 CIFS_MOUNT_MAP_SPECIAL_CHR);
1020 /* BB to be implemented via Windows secrty descriptors
1021 eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
1022 -1, -1, local_nls); */
1023 if (direntry->d_inode) {
1024 direntry->d_inode->i_mode = mode;
1025 direntry->d_inode->i_mode |= S_IFDIR;
1026 if (cifs_sb->mnt_cifs_flags &
1027 CIFS_MOUNT_SET_UID) {
1028 direntry->d_inode->i_uid =
1030 direntry->d_inode->i_gid =
1042 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1046 struct cifs_sb_info *cifs_sb;
1047 struct cifsTconInfo *pTcon;
1048 char *full_path = NULL;
1049 struct cifsInodeInfo *cifsInode;
1051 cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
1055 cifs_sb = CIFS_SB(inode->i_sb);
1056 pTcon = cifs_sb->tcon;
1058 full_path = build_path_from_dentry(direntry);
1059 if (full_path == NULL) {
1064 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1065 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1069 spin_lock(&direntry->d_inode->i_lock);
1070 i_size_write(direntry->d_inode, 0);
1071 clear_nlink(direntry->d_inode);
1072 spin_unlock(&direntry->d_inode->i_lock);
1075 cifsInode = CIFS_I(direntry->d_inode);
1076 cifsInode->time = 0; /* force revalidate to go get info when
1078 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1079 current_fs_time(inode->i_sb);
1086 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
1087 struct inode *target_inode, struct dentry *target_direntry)
1091 struct cifs_sb_info *cifs_sb_source;
1092 struct cifs_sb_info *cifs_sb_target;
1093 struct cifsTconInfo *pTcon;
1099 cifs_sb_target = CIFS_SB(target_inode->i_sb);
1100 cifs_sb_source = CIFS_SB(source_inode->i_sb);
1101 pTcon = cifs_sb_source->tcon;
1103 if (pTcon != cifs_sb_target->tcon) {
1105 return -EXDEV; /* BB actually could be allowed if same server,
1106 but different share.
1107 Might eventually add support for this */
1110 /* we already have the rename sem so we do not need to grab it again
1111 here to protect the path integrity */
1112 fromName = build_path_from_dentry(source_direntry);
1113 toName = build_path_from_dentry(target_direntry);
1114 if ((fromName == NULL) || (toName == NULL)) {
1116 goto cifs_rename_exit;
1119 rc = CIFSSMBRename(xid, pTcon, fromName, toName,
1120 cifs_sb_source->local_nls,
1121 cifs_sb_source->mnt_cifs_flags &
1122 CIFS_MOUNT_MAP_SPECIAL_CHR);
1123 if (rc == -EEXIST) {
1124 /* check if they are the same file because rename of hardlinked
1126 FILE_UNIX_BASIC_INFO *info_buf_source;
1127 FILE_UNIX_BASIC_INFO *info_buf_target;
1130 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1131 if (info_buf_source != NULL) {
1132 info_buf_target = info_buf_source + 1;
1133 if (pTcon->ses->capabilities & CAP_UNIX)
1134 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
1136 cifs_sb_source->local_nls,
1137 cifs_sb_source->mnt_cifs_flags &
1138 CIFS_MOUNT_MAP_SPECIAL_CHR);
1139 /* else rc is still EEXIST so will fall through to
1140 unlink the target and retry rename */
1142 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
1144 cifs_sb_target->local_nls,
1145 /* remap based on source sb */
1146 cifs_sb_source->mnt_cifs_flags &
1147 CIFS_MOUNT_MAP_SPECIAL_CHR);
1150 (info_buf_source->UniqueId ==
1151 info_buf_target->UniqueId)) {
1152 /* do not rename since the files are hardlinked which
1155 /* we either can not tell the files are hardlinked
1156 (as with Windows servers) or files are not
1157 hardlinked so delete the target manually before
1158 renaming to follow POSIX rather than Windows
1160 cifs_unlink(target_inode, target_direntry);
1161 rc = CIFSSMBRename(xid, pTcon, fromName,
1163 cifs_sb_source->local_nls,
1164 cifs_sb_source->mnt_cifs_flags
1165 & CIFS_MOUNT_MAP_SPECIAL_CHR);
1167 kfree(info_buf_source);
1168 } /* if we can not get memory just leave rc as EEXIST */
1172 cFYI(1, ("rename rc %d", rc));
1175 if ((rc == -EIO) || (rc == -EEXIST)) {
1179 /* BB FIXME Is Generic Read correct for rename? */
1180 /* if renaming directory - we should not say CREATE_NOT_DIR,
1181 need to test renaming open directory, also GENERIC_READ
1182 might not right be right access to request */
1183 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
1184 CREATE_NOT_DIR, &netfid, &oplock, NULL,
1185 cifs_sb_source->local_nls,
1186 cifs_sb_source->mnt_cifs_flags &
1187 CIFS_MOUNT_MAP_SPECIAL_CHR);
1189 rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
1190 cifs_sb_source->local_nls,
1191 cifs_sb_source->mnt_cifs_flags &
1192 CIFS_MOUNT_MAP_SPECIAL_CHR);
1193 CIFSSMBClose(xid, pTcon, netfid);
1204 int cifs_revalidate(struct dentry *direntry)
1209 struct cifs_sb_info *cifs_sb;
1210 struct cifsInodeInfo *cifsInode;
1212 struct timespec local_mtime;
1213 int invalidate_inode = FALSE;
1215 if (direntry->d_inode == NULL)
1218 cifsInode = CIFS_I(direntry->d_inode);
1220 if (cifsInode == NULL)
1223 /* no sense revalidating inode info on file that no one can write */
1224 if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
1229 cifs_sb = CIFS_SB(direntry->d_sb);
1231 /* can not safely grab the rename sem here if rename calls revalidate
1232 since that would deadlock */
1233 full_path = build_path_from_dentry(direntry);
1234 if (full_path == NULL) {
1238 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1239 "jiffies %ld", full_path, direntry->d_inode,
1240 direntry->d_inode->i_count.counter, direntry,
1241 direntry->d_time, jiffies));
1243 if (cifsInode->time == 0) {
1244 /* was set to zero previously to force revalidate */
1245 } else if (time_before(jiffies, cifsInode->time + HZ) &&
1246 lookupCacheEnabled) {
1247 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1248 (direntry->d_inode->i_nlink == 1)) {
1253 cFYI(1, ("Have to revalidate file due to hardlinks"));
1257 /* save mtime and size */
1258 local_mtime = direntry->d_inode->i_mtime;
1259 local_size = direntry->d_inode->i_size;
1261 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX) {
1262 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1263 direntry->d_sb, xid);
1265 cFYI(1, ("error on getting revalidate info %d", rc));
1266 /* if (rc != -ENOENT)
1267 rc = 0; */ /* BB should we cache info on
1271 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1272 direntry->d_sb, xid);
1274 cFYI(1, ("error on getting revalidate info %d", rc));
1275 /* if (rc != -ENOENT)
1276 rc = 0; */ /* BB should we cache info on
1280 /* should we remap certain errors, access denied?, to zero */
1282 /* if not oplocked, we invalidate inode pages if mtime or file size
1283 had changed on server */
1285 if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) &&
1286 (local_size == direntry->d_inode->i_size)) {
1287 cFYI(1, ("cifs_revalidate - inode unchanged"));
1289 /* file may have changed on server */
1290 if (cifsInode->clientCanCacheRead) {
1291 /* no need to invalidate inode pages since we were the
1292 only ones who could have modified the file and the
1293 server copy is staler than ours */
1295 invalidate_inode = TRUE;
1299 /* can not grab this sem since kernel filesys locking documentation
1300 indicates i_mutex may be taken by the kernel on lookup and rename
1301 which could deadlock if we grab the i_mutex here as well */
1302 /* mutex_lock(&direntry->d_inode->i_mutex);*/
1303 /* need to write out dirty pages here */
1304 if (direntry->d_inode->i_mapping) {
1305 /* do we need to lock inode until after invalidate completes
1307 filemap_fdatawrite(direntry->d_inode->i_mapping);
1309 if (invalidate_inode) {
1310 /* shrink_dcache not necessary now that cifs dentry ops
1311 are exported for negative dentries */
1312 /* if (S_ISDIR(direntry->d_inode->i_mode))
1313 shrink_dcache_parent(direntry); */
1314 if (S_ISREG(direntry->d_inode->i_mode)) {
1315 if (direntry->d_inode->i_mapping)
1316 filemap_fdatawait(direntry->d_inode->i_mapping);
1317 /* may eventually have to do this for open files too */
1318 if (list_empty(&(cifsInode->openFileList))) {
1319 /* changed on server - flush read ahead pages */
1320 cFYI(1, ("Invalidating read ahead data on "
1322 invalidate_remote_inode(direntry->d_inode);
1326 /* mutex_unlock(&direntry->d_inode->i_mutex); */
1333 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1336 int err = cifs_revalidate(dentry);
1338 generic_fillattr(dentry->d_inode, stat);
1339 stat->blksize = CIFS_MAX_MSGSIZE;
1344 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1346 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1347 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1351 page = grab_cache_page(mapping, index);
1355 zero_user_page(page, offset, PAGE_CACHE_SIZE - offset, KM_USER0);
1357 page_cache_release(page);
1361 static int cifs_vmtruncate(struct inode *inode, loff_t offset)
1363 struct address_space *mapping = inode->i_mapping;
1364 unsigned long limit;
1366 spin_lock(&inode->i_lock);
1367 if (inode->i_size < offset)
1370 * truncation of in-use swapfiles is disallowed - it would cause
1371 * subsequent swapout to scribble on the now-freed blocks.
1373 if (IS_SWAPFILE(inode)) {
1374 spin_unlock(&inode->i_lock);
1377 i_size_write(inode, offset);
1378 spin_unlock(&inode->i_lock);
1379 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1380 truncate_inode_pages(mapping, offset);
1384 limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
1385 if (limit != RLIM_INFINITY && offset > limit) {
1386 spin_unlock(&inode->i_lock);
1389 if (offset > inode->i_sb->s_maxbytes) {
1390 spin_unlock(&inode->i_lock);
1393 i_size_write(inode, offset);
1394 spin_unlock(&inode->i_lock);
1396 if (inode->i_op && inode->i_op->truncate)
1397 inode->i_op->truncate(inode);
1400 send_sig(SIGXFSZ, current, 0);
1407 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1410 struct cifs_sb_info *cifs_sb;
1411 struct cifsTconInfo *pTcon;
1412 char *full_path = NULL;
1414 struct cifsFileInfo *open_file = NULL;
1415 FILE_BASIC_INFO time_buf;
1416 int set_time = FALSE;
1417 int set_dosattr = FALSE;
1418 __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1419 __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1420 __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1421 struct cifsInodeInfo *cifsInode;
1425 cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1426 direntry->d_name.name, attrs->ia_valid));
1428 cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
1429 pTcon = cifs_sb->tcon;
1431 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1432 /* check if we have permission to change attrs */
1433 rc = inode_change_ok(direntry->d_inode, attrs);
1441 full_path = build_path_from_dentry(direntry);
1442 if (full_path == NULL) {
1446 cifsInode = CIFS_I(direntry->d_inode);
1448 /* BB check if we need to refresh inode from server now ? BB */
1450 /* need to flush data before changing file size on server */
1451 filemap_write_and_wait(direntry->d_inode->i_mapping);
1453 if (attrs->ia_valid & ATTR_SIZE) {
1454 /* To avoid spurious oplock breaks from server, in the case of
1455 inodes that we already have open, avoid doing path based
1456 setting of file size if we can do it by handle.
1457 This keeps our caching token (oplock) and avoids timeouts
1458 when the local oplock break takes longer to flush
1459 writebehind data than the SMB timeout for the SetPathInfo
1460 request would allow */
1462 open_file = find_writable_file(cifsInode);
1464 __u16 nfid = open_file->netfid;
1465 __u32 npid = open_file->pid;
1466 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1468 atomic_dec(&open_file->wrtPending);
1469 cFYI(1, ("SetFSize for attrs rc = %d", rc));
1470 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1472 rc = CIFSSMBWrite(xid, pTcon,
1473 nfid, 0, attrs->ia_size,
1474 &bytes_written, NULL, NULL,
1475 1 /* 45 seconds */);
1476 cFYI(1, ("Wrt seteof rc %d", rc));
1482 /* Set file size by pathname rather than by handle
1483 either because no valid, writeable file handle for
1484 it was found or because there was an error setting
1486 rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1487 attrs->ia_size, FALSE,
1489 cifs_sb->mnt_cifs_flags &
1490 CIFS_MOUNT_MAP_SPECIAL_CHR);
1491 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1492 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1496 rc = SMBLegacyOpen(xid, pTcon, full_path,
1498 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1499 CREATE_NOT_DIR, &netfid, &oplock,
1500 NULL, cifs_sb->local_nls,
1501 cifs_sb->mnt_cifs_flags &
1502 CIFS_MOUNT_MAP_SPECIAL_CHR);
1505 rc = CIFSSMBWrite(xid, pTcon,
1508 &bytes_written, NULL,
1509 NULL, 1 /* 45 sec */);
1510 cFYI(1, ("wrt seteof rc %d", rc));
1511 CIFSSMBClose(xid, pTcon, netfid);
1517 /* Server is ok setting allocation size implicitly - no need
1519 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1520 cifs_sb->local_nls);
1524 rc = cifs_vmtruncate(direntry->d_inode, attrs->ia_size);
1525 cifs_truncate_page(direntry->d_inode->i_mapping,
1526 direntry->d_inode->i_size);
1528 goto cifs_setattr_exit;
1530 if (attrs->ia_valid & ATTR_UID) {
1531 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1532 uid = attrs->ia_uid;
1534 if (attrs->ia_valid & ATTR_GID) {
1535 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1536 gid = attrs->ia_gid;
1539 time_buf.Attributes = 0;
1540 if (attrs->ia_valid & ATTR_MODE) {
1541 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1542 mode = attrs->ia_mode;
1545 if ((cifs_sb->tcon->ses->capabilities & CAP_UNIX)
1546 && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1547 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
1548 0 /* dev_t */, cifs_sb->local_nls,
1549 cifs_sb->mnt_cifs_flags &
1550 CIFS_MOUNT_MAP_SPECIAL_CHR);
1551 else if (attrs->ia_valid & ATTR_MODE) {
1553 if ((mode & S_IWUGO) == 0) /* not writeable */ {
1554 if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
1556 time_buf.Attributes =
1557 cpu_to_le32(cifsInode->cifsAttrs |
1560 } else if (cifsInode->cifsAttrs & ATTR_READONLY) {
1561 /* If file is readonly on server, we would
1562 not be able to write to it - so if any write
1563 bit is enabled for user or group or other we
1564 need to at least try to remove r/o dos attr */
1566 time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs &
1568 /* Windows ignores set to zero */
1569 if (time_buf.Attributes == 0)
1570 time_buf.Attributes |= cpu_to_le32(ATTR_NORMAL);
1572 /* BB to be implemented -
1573 via Windows security descriptors or streams */
1574 /* CIFSSMBWinSetPerms(xid, pTcon, full_path, mode, uid, gid,
1575 cifs_sb->local_nls); */
1578 if (attrs->ia_valid & ATTR_ATIME) {
1580 time_buf.LastAccessTime =
1581 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1583 time_buf.LastAccessTime = 0;
1585 if (attrs->ia_valid & ATTR_MTIME) {
1587 time_buf.LastWriteTime =
1588 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1590 time_buf.LastWriteTime = 0;
1591 /* Do not set ctime explicitly unless other time
1592 stamps are changed explicitly (i.e. by utime()
1593 since we would then have a mix of client and
1596 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1598 /* Although Samba throws this field away
1599 it may be useful to Windows - but we do
1600 not want to set ctime unless some other
1601 timestamp is changing */
1602 cFYI(1, ("CIFS - CTIME changed"));
1603 time_buf.ChangeTime =
1604 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1606 time_buf.ChangeTime = 0;
1608 if (set_time || set_dosattr) {
1609 time_buf.CreationTime = 0; /* do not change */
1610 /* In the future we should experiment - try setting timestamps
1611 via Handle (SetFileInfo) instead of by path */
1612 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1613 rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
1615 cifs_sb->mnt_cifs_flags &
1616 CIFS_MOUNT_MAP_SPECIAL_CHR);
1620 if (rc == -EOPNOTSUPP) {
1624 cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1625 "times not supported by this server"));
1626 /* BB we could scan to see if we already have it open
1627 and pass in pid of opener to function */
1628 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1629 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1630 CREATE_NOT_DIR, &netfid, &oplock,
1631 NULL, cifs_sb->local_nls,
1632 cifs_sb->mnt_cifs_flags &
1633 CIFS_MOUNT_MAP_SPECIAL_CHR);
1635 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1637 CIFSSMBClose(xid, pTcon, netfid);
1639 /* BB For even older servers we could convert time_buf
1640 into old DOS style which uses two second
1643 /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1644 &time_buf, cifs_sb->local_nls); */
1647 /* Even if error on time set, no sense failing the call if
1648 the server would set the time to a reasonable value anyway,
1649 and this check ensures that we are not being called from
1650 sys_utimes in which case we ought to fail the call back to
1651 the user when the server rejects the call */
1652 if ((rc) && (attrs->ia_valid &
1653 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1657 /* do not need local check to inode_check_ok since the server does
1660 rc = inode_setattr(direntry->d_inode, attrs);
1668 void cifs_delete_inode(struct inode *inode)
1670 cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1671 /* may have to add back in if and when safe distributed caching of
1672 directories added e.g. via FindNotify */