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);
587 if (cifs_sb->tcon->unix_ext)
588 cifs_get_inode_info_unix(&inode, "", inode->i_sb, xid);
590 cifs_get_inode_info(&inode, "", NULL, inode->i_sb, xid);
591 /* can not call macro FreeXid here since in a void func */
595 int cifs_unlink(struct inode *inode, struct dentry *direntry)
599 struct cifs_sb_info *cifs_sb;
600 struct cifsTconInfo *pTcon;
601 char *full_path = NULL;
602 struct cifsInodeInfo *cifsInode;
603 FILE_BASIC_INFO *pinfo_buf;
605 cFYI(1, ("cifs_unlink, inode = 0x%p", inode));
610 cifs_sb = CIFS_SB(inode->i_sb);
612 cifs_sb = CIFS_SB(direntry->d_sb);
613 pTcon = cifs_sb->tcon;
615 /* Unlink can be called from rename so we can not grab the sem here
616 since we deadlock otherwise */
617 /* mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/
618 full_path = build_path_from_dentry(direntry);
619 /* mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/
620 if (full_path == NULL) {
625 if ((pTcon->ses->capabilities & CAP_UNIX) &&
626 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
627 le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
628 rc = CIFSPOSIXDelFile(xid, pTcon, full_path,
629 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
630 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
631 cFYI(1, ("posix del rc %d", rc));
632 if ((rc == 0) || (rc == -ENOENT))
633 goto psx_del_no_retry;
636 rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
637 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
640 if (direntry->d_inode)
641 drop_nlink(direntry->d_inode);
642 } else if (rc == -ENOENT) {
644 } else if (rc == -ETXTBSY) {
648 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
649 CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
650 &netfid, &oplock, NULL, cifs_sb->local_nls,
651 cifs_sb->mnt_cifs_flags &
652 CIFS_MOUNT_MAP_SPECIAL_CHR);
654 CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
656 cifs_sb->mnt_cifs_flags &
657 CIFS_MOUNT_MAP_SPECIAL_CHR);
658 CIFSSMBClose(xid, pTcon, netfid);
659 if (direntry->d_inode)
660 drop_nlink(direntry->d_inode);
662 } else if (rc == -EACCES) {
663 /* try only if r/o attribute set in local lookup data? */
664 pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
666 /* ATTRS set to normal clears r/o bit */
667 pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
668 if (!(pTcon->ses->flags & CIFS_SES_NT4))
669 rc = CIFSSMBSetTimes(xid, pTcon, full_path,
672 cifs_sb->mnt_cifs_flags &
673 CIFS_MOUNT_MAP_SPECIAL_CHR);
677 if (rc == -EOPNOTSUPP) {
680 /* rc = CIFSSMBSetAttrLegacy(xid, pTcon,
684 For some strange reason it seems that NT4 eats the
685 old setattr call without actually setting the
686 attributes so on to the third attempted workaround
689 /* BB could scan to see if we already have it open
690 and pass in pid of opener to function */
691 rc = CIFSSMBOpen(xid, pTcon, full_path,
692 FILE_OPEN, SYNCHRONIZE |
693 FILE_WRITE_ATTRIBUTES, 0,
694 &netfid, &oplock, NULL,
696 cifs_sb->mnt_cifs_flags &
697 CIFS_MOUNT_MAP_SPECIAL_CHR);
699 rc = CIFSSMBSetFileTimes(xid, pTcon,
702 CIFSSMBClose(xid, pTcon, netfid);
708 rc = CIFSSMBDelFile(xid, pTcon, full_path,
710 cifs_sb->mnt_cifs_flags &
711 CIFS_MOUNT_MAP_SPECIAL_CHR);
713 if (direntry->d_inode)
714 drop_nlink(direntry->d_inode);
715 } else if (rc == -ETXTBSY) {
719 rc = CIFSSMBOpen(xid, pTcon, full_path,
722 CREATE_DELETE_ON_CLOSE,
723 &netfid, &oplock, NULL,
725 cifs_sb->mnt_cifs_flags &
726 CIFS_MOUNT_MAP_SPECIAL_CHR);
728 CIFSSMBRenameOpenFile(xid, pTcon,
731 cifs_sb->mnt_cifs_flags &
732 CIFS_MOUNT_MAP_SPECIAL_CHR);
733 CIFSSMBClose(xid, pTcon, netfid);
734 if (direntry->d_inode)
735 drop_nlink(direntry->d_inode);
737 /* BB if rc = -ETXTBUSY goto the rename logic BB */
741 if (direntry->d_inode) {
742 cifsInode = CIFS_I(direntry->d_inode);
743 cifsInode->time = 0; /* will force revalidate to get info
745 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
748 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
749 cifsInode = CIFS_I(inode);
750 cifsInode->time = 0; /* force revalidate of dir as well */
758 static void posix_fill_in_inode(struct inode *tmp_inode,
759 FILE_UNIX_BASIC_INFO *pData, int *pobject_type, int isNewInode)
762 struct timespec local_mtime;
764 struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
765 struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
767 __u32 type = le32_to_cpu(pData->Type);
768 __u64 num_of_bytes = le64_to_cpu(pData->NumOfBytes);
769 __u64 end_of_file = le64_to_cpu(pData->EndOfFile);
770 cifsInfo->time = jiffies;
771 atomic_inc(&cifsInfo->inUse);
773 /* save mtime and size */
774 local_mtime = tmp_inode->i_mtime;
775 local_size = tmp_inode->i_size;
778 cifs_NTtimeToUnix(le64_to_cpu(pData->LastAccessTime));
780 cifs_NTtimeToUnix(le64_to_cpu(pData->LastModificationTime));
782 cifs_NTtimeToUnix(le64_to_cpu(pData->LastStatusChange));
784 tmp_inode->i_mode = le64_to_cpu(pData->Permissions);
785 /* since we set the inode type below we need to mask off type
786 to avoid strange results if bits above were corrupt */
787 tmp_inode->i_mode &= ~S_IFMT;
788 if (type == UNIX_FILE) {
789 *pobject_type = DT_REG;
790 tmp_inode->i_mode |= S_IFREG;
791 } else if (type == UNIX_SYMLINK) {
792 *pobject_type = DT_LNK;
793 tmp_inode->i_mode |= S_IFLNK;
794 } else if (type == UNIX_DIR) {
795 *pobject_type = DT_DIR;
796 tmp_inode->i_mode |= S_IFDIR;
797 } else if (type == UNIX_CHARDEV) {
798 *pobject_type = DT_CHR;
799 tmp_inode->i_mode |= S_IFCHR;
800 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pData->DevMajor),
801 le64_to_cpu(pData->DevMinor) & MINORMASK);
802 } else if (type == UNIX_BLOCKDEV) {
803 *pobject_type = DT_BLK;
804 tmp_inode->i_mode |= S_IFBLK;
805 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pData->DevMajor),
806 le64_to_cpu(pData->DevMinor) & MINORMASK);
807 } else if (type == UNIX_FIFO) {
808 *pobject_type = DT_FIFO;
809 tmp_inode->i_mode |= S_IFIFO;
810 } else if (type == UNIX_SOCKET) {
811 *pobject_type = DT_SOCK;
812 tmp_inode->i_mode |= S_IFSOCK;
814 /* safest to just call it a file */
815 *pobject_type = DT_REG;
816 tmp_inode->i_mode |= S_IFREG;
817 cFYI(1, ("unknown inode type %d", type));
820 #ifdef CONFIG_CIFS_DEBUG2
821 cFYI(1, ("object type: %d", type));
823 tmp_inode->i_uid = le64_to_cpu(pData->Uid);
824 tmp_inode->i_gid = le64_to_cpu(pData->Gid);
825 tmp_inode->i_nlink = le64_to_cpu(pData->Nlinks);
827 spin_lock(&tmp_inode->i_lock);
828 if (is_size_safe_to_change(cifsInfo, end_of_file)) {
829 /* can not safely change the file size here if the
830 client is writing to it due to potential races */
831 i_size_write(tmp_inode, end_of_file);
833 /* 512 bytes (2**9) is the fake blocksize that must be used */
834 /* for this calculation, not the real blocksize */
835 tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
837 spin_unlock(&tmp_inode->i_lock);
839 if (S_ISREG(tmp_inode->i_mode)) {
840 cFYI(1, ("File inode"));
841 tmp_inode->i_op = &cifs_file_inode_ops;
843 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
844 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
845 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
847 tmp_inode->i_fop = &cifs_file_direct_ops;
849 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
850 tmp_inode->i_fop = &cifs_file_nobrl_ops;
852 tmp_inode->i_fop = &cifs_file_ops;
854 if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
855 (cifs_sb->tcon->ses->server->maxBuf <
856 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
857 tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
859 tmp_inode->i_data.a_ops = &cifs_addr_ops;
862 return; /* No sense invalidating pages for new inode
863 since we we have not started caching
864 readahead file data yet */
866 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
867 (local_size == tmp_inode->i_size)) {
868 cFYI(1, ("inode exists but unchanged"));
870 /* file may have changed on server */
871 cFYI(1, ("invalidate inode, readdir detected change"));
872 invalidate_remote_inode(tmp_inode);
874 } else if (S_ISDIR(tmp_inode->i_mode)) {
875 cFYI(1, ("Directory inode"));
876 tmp_inode->i_op = &cifs_dir_inode_ops;
877 tmp_inode->i_fop = &cifs_dir_ops;
878 } else if (S_ISLNK(tmp_inode->i_mode)) {
879 cFYI(1, ("Symbolic Link inode"));
880 tmp_inode->i_op = &cifs_symlink_inode_ops;
881 /* tmp_inode->i_fop = *//* do not need to set to anything */
883 cFYI(1, ("Special inode"));
884 init_special_inode(tmp_inode, tmp_inode->i_mode,
889 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
893 struct cifs_sb_info *cifs_sb;
894 struct cifsTconInfo *pTcon;
895 char *full_path = NULL;
896 struct inode *newinode = NULL;
898 cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
902 cifs_sb = CIFS_SB(inode->i_sb);
903 pTcon = cifs_sb->tcon;
905 full_path = build_path_from_dentry(direntry);
906 if (full_path == NULL) {
911 if ((pTcon->ses->capabilities & CAP_UNIX) &&
912 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
913 le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
915 FILE_UNIX_BASIC_INFO * pInfo =
916 kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
922 mode &= ~current->fs->umask;
923 rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT,
924 mode, NULL /* netfid */, pInfo, &oplock,
925 full_path, cifs_sb->local_nls,
926 cifs_sb->mnt_cifs_flags &
927 CIFS_MOUNT_MAP_SPECIAL_CHR);
929 cFYI(1, ("posix mkdir returned 0x%x", rc));
933 if (pInfo->Type == -1) /* no return info - go query */
935 /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
939 direntry->d_op = &cifs_ci_dentry_ops;
941 direntry->d_op = &cifs_dentry_ops;
943 newinode = new_inode(inode->i_sb);
944 if (newinode == NULL)
946 /* Is an i_ino of zero legal? */
947 /* Are there sanity checks we can use to ensure that
948 the server is really filling in that field? */
949 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
951 (unsigned long)pInfo->UniqueId;
952 } /* note ino incremented to unique num in new_inode */
953 if (inode->i_sb->s_flags & MS_NOATIME)
954 newinode->i_flags |= S_NOATIME | S_NOCMTIME;
955 newinode->i_nlink = 2;
957 insert_inode_hash(newinode);
958 d_instantiate(direntry, newinode);
960 /* we already checked in POSIXCreate whether
961 frame was long enough */
962 posix_fill_in_inode(direntry->d_inode,
963 pInfo, &obj_type, 1 /* NewInode */);
964 #ifdef CONFIG_CIFS_DEBUG2
965 cFYI(1, ("instantiated dentry %p %s to inode %p",
966 direntry, direntry->d_name.name, newinode));
968 if (newinode->i_nlink != 2)
969 cFYI(1, ("unexpected number of links %d",
977 /* BB add setting the equivalent of mode via CreateX w/ACLs */
978 rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
979 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
981 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
987 rc = cifs_get_inode_info_unix(&newinode, full_path,
990 rc = cifs_get_inode_info(&newinode, full_path, NULL,
994 direntry->d_op = &cifs_ci_dentry_ops;
996 direntry->d_op = &cifs_dentry_ops;
997 d_instantiate(direntry, newinode);
998 /* setting nlink not necessary except in cases where we
999 * failed to get it from the server or was set bogus */
1000 if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
1001 direntry->d_inode->i_nlink = 2;
1002 if (pTcon->unix_ext) {
1003 mode &= ~current->fs->umask;
1004 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1005 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1007 (__u64)current->fsuid,
1008 (__u64)current->fsgid,
1011 cifs_sb->mnt_cifs_flags &
1012 CIFS_MOUNT_MAP_SPECIAL_CHR);
1014 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1016 (__u64)-1, 0 /* dev_t */,
1018 cifs_sb->mnt_cifs_flags &
1019 CIFS_MOUNT_MAP_SPECIAL_CHR);
1022 /* BB to be implemented via Windows secrty descriptors
1023 eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
1024 -1, -1, local_nls); */
1025 if (direntry->d_inode) {
1026 direntry->d_inode->i_mode = mode;
1027 direntry->d_inode->i_mode |= S_IFDIR;
1028 if (cifs_sb->mnt_cifs_flags &
1029 CIFS_MOUNT_SET_UID) {
1030 direntry->d_inode->i_uid =
1032 direntry->d_inode->i_gid =
1044 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1048 struct cifs_sb_info *cifs_sb;
1049 struct cifsTconInfo *pTcon;
1050 char *full_path = NULL;
1051 struct cifsInodeInfo *cifsInode;
1053 cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
1057 cifs_sb = CIFS_SB(inode->i_sb);
1058 pTcon = cifs_sb->tcon;
1060 full_path = build_path_from_dentry(direntry);
1061 if (full_path == NULL) {
1066 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1067 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1071 spin_lock(&direntry->d_inode->i_lock);
1072 i_size_write(direntry->d_inode, 0);
1073 clear_nlink(direntry->d_inode);
1074 spin_unlock(&direntry->d_inode->i_lock);
1077 cifsInode = CIFS_I(direntry->d_inode);
1078 cifsInode->time = 0; /* force revalidate to go get info when
1080 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1081 current_fs_time(inode->i_sb);
1088 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
1089 struct inode *target_inode, struct dentry *target_direntry)
1093 struct cifs_sb_info *cifs_sb_source;
1094 struct cifs_sb_info *cifs_sb_target;
1095 struct cifsTconInfo *pTcon;
1101 cifs_sb_target = CIFS_SB(target_inode->i_sb);
1102 cifs_sb_source = CIFS_SB(source_inode->i_sb);
1103 pTcon = cifs_sb_source->tcon;
1105 if (pTcon != cifs_sb_target->tcon) {
1107 return -EXDEV; /* BB actually could be allowed if same server,
1108 but different share.
1109 Might eventually add support for this */
1112 /* we already have the rename sem so we do not need to grab it again
1113 here to protect the path integrity */
1114 fromName = build_path_from_dentry(source_direntry);
1115 toName = build_path_from_dentry(target_direntry);
1116 if ((fromName == NULL) || (toName == NULL)) {
1118 goto cifs_rename_exit;
1121 rc = CIFSSMBRename(xid, pTcon, fromName, toName,
1122 cifs_sb_source->local_nls,
1123 cifs_sb_source->mnt_cifs_flags &
1124 CIFS_MOUNT_MAP_SPECIAL_CHR);
1125 if (rc == -EEXIST) {
1126 /* check if they are the same file because rename of hardlinked
1128 FILE_UNIX_BASIC_INFO *info_buf_source;
1129 FILE_UNIX_BASIC_INFO *info_buf_target;
1132 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1133 if (info_buf_source != NULL) {
1134 info_buf_target = info_buf_source + 1;
1135 if (pTcon->unix_ext)
1136 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
1138 cifs_sb_source->local_nls,
1139 cifs_sb_source->mnt_cifs_flags &
1140 CIFS_MOUNT_MAP_SPECIAL_CHR);
1141 /* else rc is still EEXIST so will fall through to
1142 unlink the target and retry rename */
1144 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
1146 cifs_sb_target->local_nls,
1147 /* remap based on source sb */
1148 cifs_sb_source->mnt_cifs_flags &
1149 CIFS_MOUNT_MAP_SPECIAL_CHR);
1152 (info_buf_source->UniqueId ==
1153 info_buf_target->UniqueId)) {
1154 /* do not rename since the files are hardlinked which
1157 /* we either can not tell the files are hardlinked
1158 (as with Windows servers) or files are not
1159 hardlinked so delete the target manually before
1160 renaming to follow POSIX rather than Windows
1162 cifs_unlink(target_inode, target_direntry);
1163 rc = CIFSSMBRename(xid, pTcon, fromName,
1165 cifs_sb_source->local_nls,
1166 cifs_sb_source->mnt_cifs_flags
1167 & CIFS_MOUNT_MAP_SPECIAL_CHR);
1169 kfree(info_buf_source);
1170 } /* if we can not get memory just leave rc as EEXIST */
1174 cFYI(1, ("rename rc %d", rc));
1177 if ((rc == -EIO) || (rc == -EEXIST)) {
1181 /* BB FIXME Is Generic Read correct for rename? */
1182 /* if renaming directory - we should not say CREATE_NOT_DIR,
1183 need to test renaming open directory, also GENERIC_READ
1184 might not right be right access to request */
1185 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
1186 CREATE_NOT_DIR, &netfid, &oplock, NULL,
1187 cifs_sb_source->local_nls,
1188 cifs_sb_source->mnt_cifs_flags &
1189 CIFS_MOUNT_MAP_SPECIAL_CHR);
1191 rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
1192 cifs_sb_source->local_nls,
1193 cifs_sb_source->mnt_cifs_flags &
1194 CIFS_MOUNT_MAP_SPECIAL_CHR);
1195 CIFSSMBClose(xid, pTcon, netfid);
1206 int cifs_revalidate(struct dentry *direntry)
1211 struct cifs_sb_info *cifs_sb;
1212 struct cifsInodeInfo *cifsInode;
1214 struct timespec local_mtime;
1215 int invalidate_inode = FALSE;
1217 if (direntry->d_inode == NULL)
1220 cifsInode = CIFS_I(direntry->d_inode);
1222 if (cifsInode == NULL)
1225 /* no sense revalidating inode info on file that no one can write */
1226 if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
1231 cifs_sb = CIFS_SB(direntry->d_sb);
1233 /* can not safely grab the rename sem here if rename calls revalidate
1234 since that would deadlock */
1235 full_path = build_path_from_dentry(direntry);
1236 if (full_path == NULL) {
1240 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1241 "jiffies %ld", full_path, direntry->d_inode,
1242 direntry->d_inode->i_count.counter, direntry,
1243 direntry->d_time, jiffies));
1245 if (cifsInode->time == 0) {
1246 /* was set to zero previously to force revalidate */
1247 } else if (time_before(jiffies, cifsInode->time + HZ) &&
1248 lookupCacheEnabled) {
1249 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1250 (direntry->d_inode->i_nlink == 1)) {
1255 cFYI(1, ("Have to revalidate file due to hardlinks"));
1259 /* save mtime and size */
1260 local_mtime = direntry->d_inode->i_mtime;
1261 local_size = direntry->d_inode->i_size;
1263 if (cifs_sb->tcon->unix_ext) {
1264 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1265 direntry->d_sb, xid);
1267 cFYI(1, ("error on getting revalidate info %d", rc));
1268 /* if (rc != -ENOENT)
1269 rc = 0; */ /* BB should we cache info on
1273 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1274 direntry->d_sb, xid);
1276 cFYI(1, ("error on getting revalidate info %d", rc));
1277 /* if (rc != -ENOENT)
1278 rc = 0; */ /* BB should we cache info on
1282 /* should we remap certain errors, access denied?, to zero */
1284 /* if not oplocked, we invalidate inode pages if mtime or file size
1285 had changed on server */
1287 if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) &&
1288 (local_size == direntry->d_inode->i_size)) {
1289 cFYI(1, ("cifs_revalidate - inode unchanged"));
1291 /* file may have changed on server */
1292 if (cifsInode->clientCanCacheRead) {
1293 /* no need to invalidate inode pages since we were the
1294 only ones who could have modified the file and the
1295 server copy is staler than ours */
1297 invalidate_inode = TRUE;
1301 /* can not grab this sem since kernel filesys locking documentation
1302 indicates i_mutex may be taken by the kernel on lookup and rename
1303 which could deadlock if we grab the i_mutex here as well */
1304 /* mutex_lock(&direntry->d_inode->i_mutex);*/
1305 /* need to write out dirty pages here */
1306 if (direntry->d_inode->i_mapping) {
1307 /* do we need to lock inode until after invalidate completes
1309 filemap_fdatawrite(direntry->d_inode->i_mapping);
1311 if (invalidate_inode) {
1312 /* shrink_dcache not necessary now that cifs dentry ops
1313 are exported for negative dentries */
1314 /* if (S_ISDIR(direntry->d_inode->i_mode))
1315 shrink_dcache_parent(direntry); */
1316 if (S_ISREG(direntry->d_inode->i_mode)) {
1317 if (direntry->d_inode->i_mapping)
1318 filemap_fdatawait(direntry->d_inode->i_mapping);
1319 /* may eventually have to do this for open files too */
1320 if (list_empty(&(cifsInode->openFileList))) {
1321 /* changed on server - flush read ahead pages */
1322 cFYI(1, ("Invalidating read ahead data on "
1324 invalidate_remote_inode(direntry->d_inode);
1328 /* mutex_unlock(&direntry->d_inode->i_mutex); */
1335 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1338 int err = cifs_revalidate(dentry);
1340 generic_fillattr(dentry->d_inode, stat);
1341 stat->blksize = CIFS_MAX_MSGSIZE;
1346 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1348 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1349 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1353 page = grab_cache_page(mapping, index);
1357 zero_user_page(page, offset, PAGE_CACHE_SIZE - offset, KM_USER0);
1359 page_cache_release(page);
1363 static int cifs_vmtruncate(struct inode *inode, loff_t offset)
1365 struct address_space *mapping = inode->i_mapping;
1366 unsigned long limit;
1368 spin_lock(&inode->i_lock);
1369 if (inode->i_size < offset)
1372 * truncation of in-use swapfiles is disallowed - it would cause
1373 * subsequent swapout to scribble on the now-freed blocks.
1375 if (IS_SWAPFILE(inode)) {
1376 spin_unlock(&inode->i_lock);
1379 i_size_write(inode, offset);
1380 spin_unlock(&inode->i_lock);
1382 * unmap_mapping_range is called twice, first simply for efficiency
1383 * so that truncate_inode_pages does fewer single-page unmaps. However
1384 * after this first call, and before truncate_inode_pages finishes,
1385 * it is possible for private pages to be COWed, which remain after
1386 * truncate_inode_pages finishes, hence the second unmap_mapping_range
1387 * call must be made for correctness.
1389 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1390 truncate_inode_pages(mapping, offset);
1391 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1395 limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
1396 if (limit != RLIM_INFINITY && offset > limit) {
1397 spin_unlock(&inode->i_lock);
1400 if (offset > inode->i_sb->s_maxbytes) {
1401 spin_unlock(&inode->i_lock);
1404 i_size_write(inode, offset);
1405 spin_unlock(&inode->i_lock);
1407 if (inode->i_op && inode->i_op->truncate)
1408 inode->i_op->truncate(inode);
1411 send_sig(SIGXFSZ, current, 0);
1418 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1421 struct cifs_sb_info *cifs_sb;
1422 struct cifsTconInfo *pTcon;
1423 char *full_path = NULL;
1425 struct cifsFileInfo *open_file = NULL;
1426 FILE_BASIC_INFO time_buf;
1427 int set_time = FALSE;
1428 int set_dosattr = FALSE;
1429 __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1430 __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1431 __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1432 struct cifsInodeInfo *cifsInode;
1436 cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1437 direntry->d_name.name, attrs->ia_valid));
1439 cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
1440 pTcon = cifs_sb->tcon;
1442 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1443 /* check if we have permission to change attrs */
1444 rc = inode_change_ok(direntry->d_inode, attrs);
1452 full_path = build_path_from_dentry(direntry);
1453 if (full_path == NULL) {
1457 cifsInode = CIFS_I(direntry->d_inode);
1459 /* BB check if we need to refresh inode from server now ? BB */
1461 /* need to flush data before changing file size on server */
1462 filemap_write_and_wait(direntry->d_inode->i_mapping);
1464 if (attrs->ia_valid & ATTR_SIZE) {
1465 /* To avoid spurious oplock breaks from server, in the case of
1466 inodes that we already have open, avoid doing path based
1467 setting of file size if we can do it by handle.
1468 This keeps our caching token (oplock) and avoids timeouts
1469 when the local oplock break takes longer to flush
1470 writebehind data than the SMB timeout for the SetPathInfo
1471 request would allow */
1473 open_file = find_writable_file(cifsInode);
1475 __u16 nfid = open_file->netfid;
1476 __u32 npid = open_file->pid;
1477 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1479 atomic_dec(&open_file->wrtPending);
1480 cFYI(1, ("SetFSize for attrs rc = %d", rc));
1481 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1482 unsigned int bytes_written;
1483 rc = CIFSSMBWrite(xid, pTcon,
1484 nfid, 0, attrs->ia_size,
1485 &bytes_written, NULL, NULL,
1486 1 /* 45 seconds */);
1487 cFYI(1, ("Wrt seteof rc %d", rc));
1493 /* Set file size by pathname rather than by handle
1494 either because no valid, writeable file handle for
1495 it was found or because there was an error setting
1497 rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1498 attrs->ia_size, FALSE,
1500 cifs_sb->mnt_cifs_flags &
1501 CIFS_MOUNT_MAP_SPECIAL_CHR);
1502 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1503 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1507 rc = SMBLegacyOpen(xid, pTcon, full_path,
1509 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1510 CREATE_NOT_DIR, &netfid, &oplock,
1511 NULL, cifs_sb->local_nls,
1512 cifs_sb->mnt_cifs_flags &
1513 CIFS_MOUNT_MAP_SPECIAL_CHR);
1515 unsigned int bytes_written;
1516 rc = CIFSSMBWrite(xid, pTcon,
1519 &bytes_written, NULL,
1520 NULL, 1 /* 45 sec */);
1521 cFYI(1, ("wrt seteof rc %d", rc));
1522 CIFSSMBClose(xid, pTcon, netfid);
1528 /* Server is ok setting allocation size implicitly - no need
1530 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1531 cifs_sb->local_nls);
1535 rc = cifs_vmtruncate(direntry->d_inode, attrs->ia_size);
1536 cifs_truncate_page(direntry->d_inode->i_mapping,
1537 direntry->d_inode->i_size);
1539 goto cifs_setattr_exit;
1541 if (attrs->ia_valid & ATTR_UID) {
1542 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1543 uid = attrs->ia_uid;
1545 if (attrs->ia_valid & ATTR_GID) {
1546 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1547 gid = attrs->ia_gid;
1550 time_buf.Attributes = 0;
1551 if (attrs->ia_valid & ATTR_MODE) {
1552 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1553 mode = attrs->ia_mode;
1556 if ((pTcon->unix_ext)
1557 && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1558 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
1559 0 /* dev_t */, cifs_sb->local_nls,
1560 cifs_sb->mnt_cifs_flags &
1561 CIFS_MOUNT_MAP_SPECIAL_CHR);
1562 else if (attrs->ia_valid & ATTR_MODE) {
1564 if ((mode & S_IWUGO) == 0) /* not writeable */ {
1565 if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
1567 time_buf.Attributes =
1568 cpu_to_le32(cifsInode->cifsAttrs |
1571 } else if (cifsInode->cifsAttrs & ATTR_READONLY) {
1572 /* If file is readonly on server, we would
1573 not be able to write to it - so if any write
1574 bit is enabled for user or group or other we
1575 need to at least try to remove r/o dos attr */
1577 time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs &
1579 /* Windows ignores set to zero */
1580 if (time_buf.Attributes == 0)
1581 time_buf.Attributes |= cpu_to_le32(ATTR_NORMAL);
1583 /* BB to be implemented -
1584 via Windows security descriptors or streams */
1585 /* CIFSSMBWinSetPerms(xid, pTcon, full_path, mode, uid, gid,
1586 cifs_sb->local_nls); */
1589 if (attrs->ia_valid & ATTR_ATIME) {
1591 time_buf.LastAccessTime =
1592 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1594 time_buf.LastAccessTime = 0;
1596 if (attrs->ia_valid & ATTR_MTIME) {
1598 time_buf.LastWriteTime =
1599 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1601 time_buf.LastWriteTime = 0;
1602 /* Do not set ctime explicitly unless other time
1603 stamps are changed explicitly (i.e. by utime()
1604 since we would then have a mix of client and
1607 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1609 /* Although Samba throws this field away
1610 it may be useful to Windows - but we do
1611 not want to set ctime unless some other
1612 timestamp is changing */
1613 cFYI(1, ("CIFS - CTIME changed"));
1614 time_buf.ChangeTime =
1615 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1617 time_buf.ChangeTime = 0;
1619 if (set_time || set_dosattr) {
1620 time_buf.CreationTime = 0; /* do not change */
1621 /* In the future we should experiment - try setting timestamps
1622 via Handle (SetFileInfo) instead of by path */
1623 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1624 rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
1626 cifs_sb->mnt_cifs_flags &
1627 CIFS_MOUNT_MAP_SPECIAL_CHR);
1631 if (rc == -EOPNOTSUPP) {
1635 cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1636 "times not supported by this server"));
1637 /* BB we could scan to see if we already have it open
1638 and pass in pid of opener to function */
1639 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1640 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1641 CREATE_NOT_DIR, &netfid, &oplock,
1642 NULL, cifs_sb->local_nls,
1643 cifs_sb->mnt_cifs_flags &
1644 CIFS_MOUNT_MAP_SPECIAL_CHR);
1646 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1648 CIFSSMBClose(xid, pTcon, netfid);
1650 /* BB For even older servers we could convert time_buf
1651 into old DOS style which uses two second
1654 /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1655 &time_buf, cifs_sb->local_nls); */
1658 /* Even if error on time set, no sense failing the call if
1659 the server would set the time to a reasonable value anyway,
1660 and this check ensures that we are not being called from
1661 sys_utimes in which case we ought to fail the call back to
1662 the user when the server rejects the call */
1663 if ((rc) && (attrs->ia_valid &
1664 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1668 /* do not need local check to inode_check_ok since the server does
1671 rc = inode_setattr(direntry->d_inode, attrs);
1679 void cifs_delete_inode(struct inode *inode)
1681 cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1682 /* may have to add back in if and when safe distributed caching of
1683 directories added e.g. via FindNotify */