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);
928 if (rc == -EOPNOTSUPP) {
930 goto mkdir_retry_old;
932 cFYI(1, ("posix mkdir returned 0x%x", rc));
936 if (pInfo->Type == -1) /* no return info - go query */ {
940 /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
944 direntry->d_op = &cifs_ci_dentry_ops;
946 direntry->d_op = &cifs_dentry_ops;
948 newinode = new_inode(inode->i_sb);
949 if (newinode == NULL) {
953 /* Is an i_ino of zero legal? */
954 /* Are there sanity checks we can use to ensure that
955 the server is really filling in that field? */
956 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
958 (unsigned long)pInfo->UniqueId;
959 } /* note ino incremented to unique num in new_inode */
960 if (inode->i_sb->s_flags & MS_NOATIME)
961 newinode->i_flags |= S_NOATIME | S_NOCMTIME;
962 newinode->i_nlink = 2;
964 insert_inode_hash(newinode);
965 d_instantiate(direntry, newinode);
967 /* we already checked in POSIXCreate whether
968 frame was long enough */
969 posix_fill_in_inode(direntry->d_inode,
970 pInfo, &obj_type, 1 /* NewInode */);
971 #ifdef CONFIG_CIFS_DEBUG2
972 cFYI(1, ("instantiated dentry %p %s to inode %p",
973 direntry, direntry->d_name.name, newinode));
975 if (newinode->i_nlink != 2)
976 cFYI(1, ("unexpected number of links %d",
984 /* BB add setting the equivalent of mode via CreateX w/ACLs */
985 rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
986 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
988 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
994 rc = cifs_get_inode_info_unix(&newinode, full_path,
997 rc = cifs_get_inode_info(&newinode, full_path, NULL,
1001 direntry->d_op = &cifs_ci_dentry_ops;
1003 direntry->d_op = &cifs_dentry_ops;
1004 d_instantiate(direntry, newinode);
1005 /* setting nlink not necessary except in cases where we
1006 * failed to get it from the server or was set bogus */
1007 if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
1008 direntry->d_inode->i_nlink = 2;
1009 if (pTcon->unix_ext) {
1010 mode &= ~current->fs->umask;
1011 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1012 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1014 (__u64)current->fsuid,
1015 (__u64)current->fsgid,
1018 cifs_sb->mnt_cifs_flags &
1019 CIFS_MOUNT_MAP_SPECIAL_CHR);
1021 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1023 (__u64)-1, 0 /* dev_t */,
1025 cifs_sb->mnt_cifs_flags &
1026 CIFS_MOUNT_MAP_SPECIAL_CHR);
1029 /* BB to be implemented via Windows secrty descriptors
1030 eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
1031 -1, -1, local_nls); */
1032 if (direntry->d_inode) {
1033 direntry->d_inode->i_mode = mode;
1034 direntry->d_inode->i_mode |= S_IFDIR;
1035 if (cifs_sb->mnt_cifs_flags &
1036 CIFS_MOUNT_SET_UID) {
1037 direntry->d_inode->i_uid =
1039 direntry->d_inode->i_gid =
1051 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1055 struct cifs_sb_info *cifs_sb;
1056 struct cifsTconInfo *pTcon;
1057 char *full_path = NULL;
1058 struct cifsInodeInfo *cifsInode;
1060 cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
1064 cifs_sb = CIFS_SB(inode->i_sb);
1065 pTcon = cifs_sb->tcon;
1067 full_path = build_path_from_dentry(direntry);
1068 if (full_path == NULL) {
1073 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1074 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1078 spin_lock(&direntry->d_inode->i_lock);
1079 i_size_write(direntry->d_inode, 0);
1080 clear_nlink(direntry->d_inode);
1081 spin_unlock(&direntry->d_inode->i_lock);
1084 cifsInode = CIFS_I(direntry->d_inode);
1085 cifsInode->time = 0; /* force revalidate to go get info when
1087 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1088 current_fs_time(inode->i_sb);
1095 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
1096 struct inode *target_inode, struct dentry *target_direntry)
1100 struct cifs_sb_info *cifs_sb_source;
1101 struct cifs_sb_info *cifs_sb_target;
1102 struct cifsTconInfo *pTcon;
1108 cifs_sb_target = CIFS_SB(target_inode->i_sb);
1109 cifs_sb_source = CIFS_SB(source_inode->i_sb);
1110 pTcon = cifs_sb_source->tcon;
1112 if (pTcon != cifs_sb_target->tcon) {
1114 return -EXDEV; /* BB actually could be allowed if same server,
1115 but different share.
1116 Might eventually add support for this */
1119 /* we already have the rename sem so we do not need to grab it again
1120 here to protect the path integrity */
1121 fromName = build_path_from_dentry(source_direntry);
1122 toName = build_path_from_dentry(target_direntry);
1123 if ((fromName == NULL) || (toName == NULL)) {
1125 goto cifs_rename_exit;
1128 rc = CIFSSMBRename(xid, pTcon, fromName, toName,
1129 cifs_sb_source->local_nls,
1130 cifs_sb_source->mnt_cifs_flags &
1131 CIFS_MOUNT_MAP_SPECIAL_CHR);
1132 if (rc == -EEXIST) {
1133 /* check if they are the same file because rename of hardlinked
1135 FILE_UNIX_BASIC_INFO *info_buf_source;
1136 FILE_UNIX_BASIC_INFO *info_buf_target;
1139 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1140 if (info_buf_source != NULL) {
1141 info_buf_target = info_buf_source + 1;
1142 if (pTcon->unix_ext)
1143 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
1145 cifs_sb_source->local_nls,
1146 cifs_sb_source->mnt_cifs_flags &
1147 CIFS_MOUNT_MAP_SPECIAL_CHR);
1148 /* else rc is still EEXIST so will fall through to
1149 unlink the target and retry rename */
1151 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
1153 cifs_sb_target->local_nls,
1154 /* remap based on source sb */
1155 cifs_sb_source->mnt_cifs_flags &
1156 CIFS_MOUNT_MAP_SPECIAL_CHR);
1159 (info_buf_source->UniqueId ==
1160 info_buf_target->UniqueId)) {
1161 /* do not rename since the files are hardlinked which
1164 /* we either can not tell the files are hardlinked
1165 (as with Windows servers) or files are not
1166 hardlinked so delete the target manually before
1167 renaming to follow POSIX rather than Windows
1169 cifs_unlink(target_inode, target_direntry);
1170 rc = CIFSSMBRename(xid, pTcon, fromName,
1172 cifs_sb_source->local_nls,
1173 cifs_sb_source->mnt_cifs_flags
1174 & CIFS_MOUNT_MAP_SPECIAL_CHR);
1176 kfree(info_buf_source);
1177 } /* if we can not get memory just leave rc as EEXIST */
1181 cFYI(1, ("rename rc %d", rc));
1184 if ((rc == -EIO) || (rc == -EEXIST)) {
1188 /* BB FIXME Is Generic Read correct for rename? */
1189 /* if renaming directory - we should not say CREATE_NOT_DIR,
1190 need to test renaming open directory, also GENERIC_READ
1191 might not right be right access to request */
1192 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
1193 CREATE_NOT_DIR, &netfid, &oplock, NULL,
1194 cifs_sb_source->local_nls,
1195 cifs_sb_source->mnt_cifs_flags &
1196 CIFS_MOUNT_MAP_SPECIAL_CHR);
1198 rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
1199 cifs_sb_source->local_nls,
1200 cifs_sb_source->mnt_cifs_flags &
1201 CIFS_MOUNT_MAP_SPECIAL_CHR);
1202 CIFSSMBClose(xid, pTcon, netfid);
1213 int cifs_revalidate(struct dentry *direntry)
1218 struct cifs_sb_info *cifs_sb;
1219 struct cifsInodeInfo *cifsInode;
1221 struct timespec local_mtime;
1222 int invalidate_inode = FALSE;
1224 if (direntry->d_inode == NULL)
1227 cifsInode = CIFS_I(direntry->d_inode);
1229 if (cifsInode == NULL)
1232 /* no sense revalidating inode info on file that no one can write */
1233 if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
1238 cifs_sb = CIFS_SB(direntry->d_sb);
1240 /* can not safely grab the rename sem here if rename calls revalidate
1241 since that would deadlock */
1242 full_path = build_path_from_dentry(direntry);
1243 if (full_path == NULL) {
1247 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1248 "jiffies %ld", full_path, direntry->d_inode,
1249 direntry->d_inode->i_count.counter, direntry,
1250 direntry->d_time, jiffies));
1252 if (cifsInode->time == 0) {
1253 /* was set to zero previously to force revalidate */
1254 } else if (time_before(jiffies, cifsInode->time + HZ) &&
1255 lookupCacheEnabled) {
1256 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1257 (direntry->d_inode->i_nlink == 1)) {
1262 cFYI(1, ("Have to revalidate file due to hardlinks"));
1266 /* save mtime and size */
1267 local_mtime = direntry->d_inode->i_mtime;
1268 local_size = direntry->d_inode->i_size;
1270 if (cifs_sb->tcon->unix_ext) {
1271 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
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 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1281 direntry->d_sb, xid);
1283 cFYI(1, ("error on getting revalidate info %d", rc));
1284 /* if (rc != -ENOENT)
1285 rc = 0; */ /* BB should we cache info on
1289 /* should we remap certain errors, access denied?, to zero */
1291 /* if not oplocked, we invalidate inode pages if mtime or file size
1292 had changed on server */
1294 if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) &&
1295 (local_size == direntry->d_inode->i_size)) {
1296 cFYI(1, ("cifs_revalidate - inode unchanged"));
1298 /* file may have changed on server */
1299 if (cifsInode->clientCanCacheRead) {
1300 /* no need to invalidate inode pages since we were the
1301 only ones who could have modified the file and the
1302 server copy is staler than ours */
1304 invalidate_inode = TRUE;
1308 /* can not grab this sem since kernel filesys locking documentation
1309 indicates i_mutex may be taken by the kernel on lookup and rename
1310 which could deadlock if we grab the i_mutex here as well */
1311 /* mutex_lock(&direntry->d_inode->i_mutex);*/
1312 /* need to write out dirty pages here */
1313 if (direntry->d_inode->i_mapping) {
1314 /* do we need to lock inode until after invalidate completes
1316 filemap_fdatawrite(direntry->d_inode->i_mapping);
1318 if (invalidate_inode) {
1319 /* shrink_dcache not necessary now that cifs dentry ops
1320 are exported for negative dentries */
1321 /* if (S_ISDIR(direntry->d_inode->i_mode))
1322 shrink_dcache_parent(direntry); */
1323 if (S_ISREG(direntry->d_inode->i_mode)) {
1324 if (direntry->d_inode->i_mapping)
1325 filemap_fdatawait(direntry->d_inode->i_mapping);
1326 /* may eventually have to do this for open files too */
1327 if (list_empty(&(cifsInode->openFileList))) {
1328 /* changed on server - flush read ahead pages */
1329 cFYI(1, ("Invalidating read ahead data on "
1331 invalidate_remote_inode(direntry->d_inode);
1335 /* mutex_unlock(&direntry->d_inode->i_mutex); */
1342 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1345 int err = cifs_revalidate(dentry);
1347 generic_fillattr(dentry->d_inode, stat);
1348 stat->blksize = CIFS_MAX_MSGSIZE;
1353 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1355 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1356 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1360 page = grab_cache_page(mapping, index);
1364 zero_user_page(page, offset, PAGE_CACHE_SIZE - offset, KM_USER0);
1366 page_cache_release(page);
1370 static int cifs_vmtruncate(struct inode *inode, loff_t offset)
1372 struct address_space *mapping = inode->i_mapping;
1373 unsigned long limit;
1375 spin_lock(&inode->i_lock);
1376 if (inode->i_size < offset)
1379 * truncation of in-use swapfiles is disallowed - it would cause
1380 * subsequent swapout to scribble on the now-freed blocks.
1382 if (IS_SWAPFILE(inode)) {
1383 spin_unlock(&inode->i_lock);
1386 i_size_write(inode, offset);
1387 spin_unlock(&inode->i_lock);
1389 * unmap_mapping_range is called twice, first simply for efficiency
1390 * so that truncate_inode_pages does fewer single-page unmaps. However
1391 * after this first call, and before truncate_inode_pages finishes,
1392 * it is possible for private pages to be COWed, which remain after
1393 * truncate_inode_pages finishes, hence the second unmap_mapping_range
1394 * call must be made for correctness.
1396 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1397 truncate_inode_pages(mapping, offset);
1398 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1402 limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
1403 if (limit != RLIM_INFINITY && offset > limit) {
1404 spin_unlock(&inode->i_lock);
1407 if (offset > inode->i_sb->s_maxbytes) {
1408 spin_unlock(&inode->i_lock);
1411 i_size_write(inode, offset);
1412 spin_unlock(&inode->i_lock);
1414 if (inode->i_op && inode->i_op->truncate)
1415 inode->i_op->truncate(inode);
1418 send_sig(SIGXFSZ, current, 0);
1425 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1428 struct cifs_sb_info *cifs_sb;
1429 struct cifsTconInfo *pTcon;
1430 char *full_path = NULL;
1432 struct cifsFileInfo *open_file = NULL;
1433 FILE_BASIC_INFO time_buf;
1434 int set_time = FALSE;
1435 int set_dosattr = FALSE;
1436 __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1437 __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1438 __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1439 struct cifsInodeInfo *cifsInode;
1443 cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1444 direntry->d_name.name, attrs->ia_valid));
1446 cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
1447 pTcon = cifs_sb->tcon;
1449 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1450 /* check if we have permission to change attrs */
1451 rc = inode_change_ok(direntry->d_inode, attrs);
1459 full_path = build_path_from_dentry(direntry);
1460 if (full_path == NULL) {
1464 cifsInode = CIFS_I(direntry->d_inode);
1466 /* BB check if we need to refresh inode from server now ? BB */
1468 /* need to flush data before changing file size on server */
1469 filemap_write_and_wait(direntry->d_inode->i_mapping);
1471 if (attrs->ia_valid & ATTR_SIZE) {
1472 /* To avoid spurious oplock breaks from server, in the case of
1473 inodes that we already have open, avoid doing path based
1474 setting of file size if we can do it by handle.
1475 This keeps our caching token (oplock) and avoids timeouts
1476 when the local oplock break takes longer to flush
1477 writebehind data than the SMB timeout for the SetPathInfo
1478 request would allow */
1480 open_file = find_writable_file(cifsInode);
1482 __u16 nfid = open_file->netfid;
1483 __u32 npid = open_file->pid;
1484 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1486 atomic_dec(&open_file->wrtPending);
1487 cFYI(1, ("SetFSize for attrs rc = %d", rc));
1488 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1489 unsigned int bytes_written;
1490 rc = CIFSSMBWrite(xid, pTcon,
1491 nfid, 0, attrs->ia_size,
1492 &bytes_written, NULL, NULL,
1493 1 /* 45 seconds */);
1494 cFYI(1, ("Wrt seteof rc %d", rc));
1500 /* Set file size by pathname rather than by handle
1501 either because no valid, writeable file handle for
1502 it was found or because there was an error setting
1504 rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1505 attrs->ia_size, FALSE,
1507 cifs_sb->mnt_cifs_flags &
1508 CIFS_MOUNT_MAP_SPECIAL_CHR);
1509 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1510 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1514 rc = SMBLegacyOpen(xid, pTcon, full_path,
1516 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1517 CREATE_NOT_DIR, &netfid, &oplock,
1518 NULL, cifs_sb->local_nls,
1519 cifs_sb->mnt_cifs_flags &
1520 CIFS_MOUNT_MAP_SPECIAL_CHR);
1522 unsigned int bytes_written;
1523 rc = CIFSSMBWrite(xid, pTcon,
1526 &bytes_written, NULL,
1527 NULL, 1 /* 45 sec */);
1528 cFYI(1, ("wrt seteof rc %d", rc));
1529 CIFSSMBClose(xid, pTcon, netfid);
1535 /* Server is ok setting allocation size implicitly - no need
1537 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1538 cifs_sb->local_nls);
1542 rc = cifs_vmtruncate(direntry->d_inode, attrs->ia_size);
1543 cifs_truncate_page(direntry->d_inode->i_mapping,
1544 direntry->d_inode->i_size);
1546 goto cifs_setattr_exit;
1548 if (attrs->ia_valid & ATTR_UID) {
1549 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1550 uid = attrs->ia_uid;
1552 if (attrs->ia_valid & ATTR_GID) {
1553 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1554 gid = attrs->ia_gid;
1557 time_buf.Attributes = 0;
1558 if (attrs->ia_valid & ATTR_MODE) {
1559 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1560 mode = attrs->ia_mode;
1563 if ((pTcon->unix_ext)
1564 && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1565 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
1566 0 /* dev_t */, cifs_sb->local_nls,
1567 cifs_sb->mnt_cifs_flags &
1568 CIFS_MOUNT_MAP_SPECIAL_CHR);
1569 else if (attrs->ia_valid & ATTR_MODE) {
1571 if ((mode & S_IWUGO) == 0) /* not writeable */ {
1572 if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
1574 time_buf.Attributes =
1575 cpu_to_le32(cifsInode->cifsAttrs |
1578 } else if (cifsInode->cifsAttrs & ATTR_READONLY) {
1579 /* If file is readonly on server, we would
1580 not be able to write to it - so if any write
1581 bit is enabled for user or group or other we
1582 need to at least try to remove r/o dos attr */
1584 time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs &
1586 /* Windows ignores set to zero */
1587 if (time_buf.Attributes == 0)
1588 time_buf.Attributes |= cpu_to_le32(ATTR_NORMAL);
1590 /* BB to be implemented -
1591 via Windows security descriptors or streams */
1592 /* CIFSSMBWinSetPerms(xid, pTcon, full_path, mode, uid, gid,
1593 cifs_sb->local_nls); */
1596 if (attrs->ia_valid & ATTR_ATIME) {
1598 time_buf.LastAccessTime =
1599 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1601 time_buf.LastAccessTime = 0;
1603 if (attrs->ia_valid & ATTR_MTIME) {
1605 time_buf.LastWriteTime =
1606 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1608 time_buf.LastWriteTime = 0;
1609 /* Do not set ctime explicitly unless other time
1610 stamps are changed explicitly (i.e. by utime()
1611 since we would then have a mix of client and
1614 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1616 /* Although Samba throws this field away
1617 it may be useful to Windows - but we do
1618 not want to set ctime unless some other
1619 timestamp is changing */
1620 cFYI(1, ("CIFS - CTIME changed"));
1621 time_buf.ChangeTime =
1622 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1624 time_buf.ChangeTime = 0;
1626 if (set_time || set_dosattr) {
1627 time_buf.CreationTime = 0; /* do not change */
1628 /* In the future we should experiment - try setting timestamps
1629 via Handle (SetFileInfo) instead of by path */
1630 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1631 rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
1633 cifs_sb->mnt_cifs_flags &
1634 CIFS_MOUNT_MAP_SPECIAL_CHR);
1638 if (rc == -EOPNOTSUPP) {
1642 cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1643 "times not supported by this server"));
1644 /* BB we could scan to see if we already have it open
1645 and pass in pid of opener to function */
1646 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1647 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1648 CREATE_NOT_DIR, &netfid, &oplock,
1649 NULL, cifs_sb->local_nls,
1650 cifs_sb->mnt_cifs_flags &
1651 CIFS_MOUNT_MAP_SPECIAL_CHR);
1653 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1655 CIFSSMBClose(xid, pTcon, netfid);
1657 /* BB For even older servers we could convert time_buf
1658 into old DOS style which uses two second
1661 /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1662 &time_buf, cifs_sb->local_nls); */
1665 /* Even if error on time set, no sense failing the call if
1666 the server would set the time to a reasonable value anyway,
1667 and this check ensures that we are not being called from
1668 sys_utimes in which case we ought to fail the call back to
1669 the user when the server rejects the call */
1670 if ((rc) && (attrs->ia_valid &
1671 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1675 /* do not need local check to inode_check_ok since the server does
1678 rc = inode_setattr(direntry->d_inode, attrs);
1686 void cifs_delete_inode(struct inode *inode)
1688 cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1689 /* may have to add back in if and when safe distributed caching of
1690 directories added e.g. via FindNotify */