4 * Copyright (C) International Business Machines Corp., 2002,2007
5 * Author(s): Steve French (sfrench@us.ibm.com)
7 * This library is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU Lesser General Public License as published
9 * by the Free Software Foundation; either version 2.1 of the License, or
10 * (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
15 * the GNU Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public License
18 * along with this library; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include <linux/stat.h>
23 #include <linux/pagemap.h>
24 #include <asm/div64.h>
28 #include "cifsproto.h"
29 #include "cifs_debug.h"
30 #include "cifs_fs_sb.h"
33 static void cifs_set_ops(struct inode
*inode
, const bool is_dfs_referral
)
35 struct cifs_sb_info
*cifs_sb
= CIFS_SB(inode
->i_sb
);
37 switch (inode
->i_mode
& S_IFMT
) {
39 inode
->i_op
= &cifs_file_inode_ops
;
40 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_DIRECT_IO
) {
41 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_BRL
)
42 inode
->i_fop
= &cifs_file_direct_nobrl_ops
;
44 inode
->i_fop
= &cifs_file_direct_ops
;
45 } else if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_BRL
)
46 inode
->i_fop
= &cifs_file_nobrl_ops
;
47 else { /* not direct, send byte range locks */
48 inode
->i_fop
= &cifs_file_ops
;
52 /* check if server can support readpages */
53 if (cifs_sb
->tcon
->ses
->server
->maxBuf
<
54 PAGE_CACHE_SIZE
+ MAX_CIFS_HDR_SIZE
)
55 inode
->i_data
.a_ops
= &cifs_addr_ops_smallbuf
;
57 inode
->i_data
.a_ops
= &cifs_addr_ops
;
60 #ifdef CONFIG_CIFS_DFS_UPCALL
61 if (is_dfs_referral
) {
62 inode
->i_op
= &cifs_dfs_referral_inode_operations
;
64 #else /* NO DFS support, treat as a directory */
67 inode
->i_op
= &cifs_dir_inode_ops
;
68 inode
->i_fop
= &cifs_dir_ops
;
72 inode
->i_op
= &cifs_symlink_inode_ops
;
75 init_special_inode(inode
, inode
->i_mode
, inode
->i_rdev
);
80 static void cifs_unix_info_to_inode(struct inode
*inode
,
81 FILE_UNIX_BASIC_INFO
*info
, int force_uid_gid
)
83 struct cifs_sb_info
*cifs_sb
= CIFS_SB(inode
->i_sb
);
84 struct cifsInodeInfo
*cifsInfo
= CIFS_I(inode
);
85 __u64 num_of_bytes
= le64_to_cpu(info
->NumOfBytes
);
86 __u64 end_of_file
= le64_to_cpu(info
->EndOfFile
);
88 inode
->i_atime
= cifs_NTtimeToUnix(le64_to_cpu(info
->LastAccessTime
));
90 cifs_NTtimeToUnix(le64_to_cpu(info
->LastModificationTime
));
91 inode
->i_ctime
= cifs_NTtimeToUnix(le64_to_cpu(info
->LastStatusChange
));
92 inode
->i_mode
= le64_to_cpu(info
->Permissions
);
95 * Since we set the inode type below we need to mask off
96 * to avoid strange results if bits set above.
98 inode
->i_mode
&= ~S_IFMT
;
99 switch (le32_to_cpu(info
->Type
)) {
101 inode
->i_mode
|= S_IFREG
;
104 inode
->i_mode
|= S_IFLNK
;
107 inode
->i_mode
|= S_IFDIR
;
110 inode
->i_mode
|= S_IFCHR
;
111 inode
->i_rdev
= MKDEV(le64_to_cpu(info
->DevMajor
),
112 le64_to_cpu(info
->DevMinor
) & MINORMASK
);
115 inode
->i_mode
|= S_IFBLK
;
116 inode
->i_rdev
= MKDEV(le64_to_cpu(info
->DevMajor
),
117 le64_to_cpu(info
->DevMinor
) & MINORMASK
);
120 inode
->i_mode
|= S_IFIFO
;
123 inode
->i_mode
|= S_IFSOCK
;
126 /* safest to call it a file if we do not know */
127 inode
->i_mode
|= S_IFREG
;
128 cFYI(1, ("unknown type %d", le32_to_cpu(info
->Type
)));
132 if ((cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_OVERR_UID
) &&
134 inode
->i_uid
= cifs_sb
->mnt_uid
;
136 inode
->i_uid
= le64_to_cpu(info
->Uid
);
138 if ((cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_OVERR_GID
) &&
140 inode
->i_gid
= cifs_sb
->mnt_gid
;
142 inode
->i_gid
= le64_to_cpu(info
->Gid
);
144 inode
->i_nlink
= le64_to_cpu(info
->Nlinks
);
146 spin_lock(&inode
->i_lock
);
147 if (is_size_safe_to_change(cifsInfo
, end_of_file
)) {
149 * We can not safely change the file size here if the client
150 * is writing to it due to potential races.
152 i_size_write(inode
, end_of_file
);
155 * i_blocks is not related to (i_size / i_blksize),
156 * but instead 512 byte (2**9) size is required for
157 * calculating num blocks.
159 inode
->i_blocks
= (512 - 1 + num_of_bytes
) >> 9;
161 spin_unlock(&inode
->i_lock
);
164 static void fill_fake_finddataunix(FILE_UNIX_BASIC_INFO
*pfnd_dat
,
165 struct super_block
*sb
)
167 struct inode
*pinode
= NULL
;
169 memset(pfnd_dat
, sizeof(FILE_UNIX_BASIC_INFO
), 0);
171 /* __le64 pfnd_dat->EndOfFile = cpu_to_le64(0);
172 __le64 pfnd_dat->NumOfBytes = cpu_to_le64(0);
173 __u64 UniqueId = 0; */
174 pfnd_dat
->LastStatusChange
=
175 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME
));
176 pfnd_dat
->LastAccessTime
=
177 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME
));
178 pfnd_dat
->LastModificationTime
=
179 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME
));
180 pfnd_dat
->Type
= cpu_to_le32(UNIX_DIR
);
181 pfnd_dat
->Permissions
= cpu_to_le64(S_IXUGO
| S_IRWXU
);
182 pfnd_dat
->Nlinks
= cpu_to_le64(2);
184 pinode
= sb
->s_root
->d_inode
;
188 /* fill in default values for the remaining based on root
189 inode since we can not query the server for this inode info */
190 pfnd_dat
->DevMajor
= cpu_to_le64(MAJOR(pinode
->i_rdev
));
191 pfnd_dat
->DevMinor
= cpu_to_le64(MINOR(pinode
->i_rdev
));
192 pfnd_dat
->Uid
= cpu_to_le64(pinode
->i_uid
);
193 pfnd_dat
->Gid
= cpu_to_le64(pinode
->i_gid
);
196 int cifs_get_inode_info_unix(struct inode
**pinode
,
197 const unsigned char *full_path
, struct super_block
*sb
, int xid
)
200 FILE_UNIX_BASIC_INFO find_data
;
201 struct cifsTconInfo
*pTcon
;
203 struct cifs_sb_info
*cifs_sb
= CIFS_SB(sb
);
204 bool is_dfs_referral
= false;
205 struct cifsInodeInfo
*cifsInfo
;
209 pTcon
= cifs_sb
->tcon
;
210 cFYI(1, ("Getting info on %s", full_path
));
212 /* could have done a find first instead but this returns more info */
213 rc
= CIFSSMBUnixQPathInfo(xid
, pTcon
, full_path
, &find_data
,
214 cifs_sb
->local_nls
, cifs_sb
->mnt_cifs_flags
&
215 CIFS_MOUNT_MAP_SPECIAL_CHR
);
217 if (rc
== -EREMOTE
&& !is_dfs_referral
) {
218 is_dfs_referral
= true;
219 cERROR(1, ("DFS ref")); /* BB removeme BB */
220 /* for DFS, server does not give us real inode data */
221 fill_fake_finddataunix(&find_data
, sb
);
225 num_of_bytes
= le64_to_cpu(find_data
.NumOfBytes
);
226 end_of_file
= le64_to_cpu(find_data
.EndOfFile
);
229 if (*pinode
== NULL
) {
230 *pinode
= new_inode(sb
);
231 if (*pinode
== NULL
) {
235 /* Is an i_ino of zero legal? */
236 /* note ino incremented to unique num in new_inode */
237 /* Are there sanity checks we can use to ensure that
238 the server is really filling in that field? */
239 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
)
240 (*pinode
)->i_ino
= (unsigned long)find_data
.UniqueId
;
242 if (sb
->s_flags
& MS_NOATIME
)
243 (*pinode
)->i_flags
|= S_NOATIME
| S_NOCMTIME
;
245 insert_inode_hash(*pinode
);
249 cifsInfo
= CIFS_I(inode
);
251 cFYI(1, ("Old time %ld", cifsInfo
->time
));
252 cifsInfo
->time
= jiffies
;
253 cFYI(1, ("New time %ld", cifsInfo
->time
));
254 /* this is ok to set on every inode revalidate */
255 atomic_set(&cifsInfo
->inUse
, 1);
257 cifs_unix_info_to_inode(inode
, &find_data
, 0);
259 if (num_of_bytes
< end_of_file
)
260 cFYI(1, ("allocation size less than end of file"));
261 cFYI(1, ("Size %ld and blocks %llu",
262 (unsigned long) inode
->i_size
,
263 (unsigned long long)inode
->i_blocks
));
265 cifs_set_ops(inode
, is_dfs_referral
);
270 static int decode_sfu_inode(struct inode
*inode
, __u64 size
,
271 const unsigned char *path
,
272 struct cifs_sb_info
*cifs_sb
, int xid
)
277 struct cifsTconInfo
*pTcon
= cifs_sb
->tcon
;
279 unsigned int bytes_read
;
285 inode
->i_mode
|= S_IFIFO
;
287 } else if (size
< 8) {
288 return -EINVAL
; /* EOPNOTSUPP? */
291 rc
= CIFSSMBOpen(xid
, pTcon
, path
, FILE_OPEN
, GENERIC_READ
,
292 CREATE_NOT_DIR
, &netfid
, &oplock
, NULL
,
294 cifs_sb
->mnt_cifs_flags
&
295 CIFS_MOUNT_MAP_SPECIAL_CHR
);
297 int buf_type
= CIFS_NO_BUFFER
;
299 rc
= CIFSSMBRead(xid
, pTcon
,
301 24 /* length */, 0 /* offset */,
302 &bytes_read
, &pbuf
, &buf_type
);
303 if ((rc
== 0) && (bytes_read
>= 8)) {
304 if (memcmp("IntxBLK", pbuf
, 8) == 0) {
305 cFYI(1, ("Block device"));
306 inode
->i_mode
|= S_IFBLK
;
307 if (bytes_read
== 24) {
308 /* we have enough to decode dev num */
309 __u64 mjr
; /* major */
310 __u64 mnr
; /* minor */
311 mjr
= le64_to_cpu(*(__le64
*)(pbuf
+8));
312 mnr
= le64_to_cpu(*(__le64
*)(pbuf
+16));
313 inode
->i_rdev
= MKDEV(mjr
, mnr
);
315 } else if (memcmp("IntxCHR", pbuf
, 8) == 0) {
316 cFYI(1, ("Char device"));
317 inode
->i_mode
|= S_IFCHR
;
318 if (bytes_read
== 24) {
319 /* we have enough to decode dev num */
320 __u64 mjr
; /* major */
321 __u64 mnr
; /* minor */
322 mjr
= le64_to_cpu(*(__le64
*)(pbuf
+8));
323 mnr
= le64_to_cpu(*(__le64
*)(pbuf
+16));
324 inode
->i_rdev
= MKDEV(mjr
, mnr
);
326 } else if (memcmp("IntxLNK", pbuf
, 7) == 0) {
327 cFYI(1, ("Symlink"));
328 inode
->i_mode
|= S_IFLNK
;
330 inode
->i_mode
|= S_IFREG
; /* file? */
334 inode
->i_mode
|= S_IFREG
; /* then it is a file */
335 rc
= -EOPNOTSUPP
; /* or some unknown SFU type */
337 CIFSSMBClose(xid
, pTcon
, netfid
);
342 #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
344 static int get_sfu_mode(struct inode
*inode
,
345 const unsigned char *path
,
346 struct cifs_sb_info
*cifs_sb
, int xid
)
348 #ifdef CONFIG_CIFS_XATTR
353 rc
= CIFSSMBQueryEA(xid
, cifs_sb
->tcon
, path
, "SETFILEBITS",
354 ea_value
, 4 /* size of buf */, cifs_sb
->local_nls
,
355 cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MAP_SPECIAL_CHR
);
359 mode
= le32_to_cpu(*((__le32
*)ea_value
));
360 inode
->i_mode
&= ~SFBITS_MASK
;
361 cFYI(1, ("special bits 0%o org mode 0%o", mode
, inode
->i_mode
));
362 inode
->i_mode
= (mode
& SFBITS_MASK
) | inode
->i_mode
;
363 cFYI(1, ("special mode bits 0%o", mode
));
373 int cifs_get_inode_info(struct inode
**pinode
,
374 const unsigned char *full_path
, FILE_ALL_INFO
*pfindData
,
375 struct super_block
*sb
, int xid
, const __u16
*pfid
)
378 struct cifsTconInfo
*pTcon
;
380 struct cifs_sb_info
*cifs_sb
= CIFS_SB(sb
);
382 bool adjustTZ
= false;
383 bool is_dfs_referral
= false;
385 pTcon
= cifs_sb
->tcon
;
386 cFYI(1, ("Getting info on %s", full_path
));
388 if ((pfindData
== NULL
) && (*pinode
!= NULL
)) {
389 if (CIFS_I(*pinode
)->clientCanCacheRead
) {
390 cFYI(1, ("No need to revalidate cached inode sizes"));
395 /* if file info not passed in then get it from server */
396 if (pfindData
== NULL
) {
397 buf
= kmalloc(sizeof(FILE_ALL_INFO
), GFP_KERNEL
);
400 pfindData
= (FILE_ALL_INFO
*)buf
;
402 try_again_CIFSSMBQPathInfo
:
403 /* could do find first instead but this returns more info */
404 rc
= CIFSSMBQPathInfo(xid
, pTcon
, full_path
, pfindData
,
406 cifs_sb
->local_nls
, cifs_sb
->mnt_cifs_flags
&
407 CIFS_MOUNT_MAP_SPECIAL_CHR
);
408 /* BB optimize code so we do not make the above call
409 when server claims no NT SMB support and the above call
410 failed at least once - set flag in tcon or mount */
411 if ((rc
== -EOPNOTSUPP
) || (rc
== -EINVAL
)) {
412 rc
= SMBQueryInformation(xid
, pTcon
, full_path
,
413 pfindData
, cifs_sb
->local_nls
,
414 cifs_sb
->mnt_cifs_flags
&
415 CIFS_MOUNT_MAP_SPECIAL_CHR
);
419 /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
421 if (rc
== -EREMOTE
&& !is_dfs_referral
) {
422 is_dfs_referral
= true;
423 goto try_again_CIFSSMBQPathInfo
;
427 struct cifsInodeInfo
*cifsInfo
;
428 __u32 attr
= le32_to_cpu(pfindData
->Attributes
);
431 if (*pinode
== NULL
) {
432 *pinode
= new_inode(sb
);
433 if (*pinode
== NULL
) {
437 /* Is an i_ino of zero legal? Can we use that to check
438 if the server supports returning inode numbers? Are
439 there other sanity checks we can use to ensure that
440 the server is really filling in that field? */
442 /* We can not use the IndexNumber field by default from
443 Windows or Samba (in ALL_INFO buf) but we can request
444 it explicitly. It may not be unique presumably if
445 the server has multiple devices mounted under one
448 /* There may be higher info levels that work but are
449 there Windows server or network appliances for which
450 IndexNumber field is not guaranteed unique? */
452 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
) {
456 rc1
= CIFSGetSrvInodeNumber(xid
, pTcon
,
457 full_path
, &inode_num
,
459 cifs_sb
->mnt_cifs_flags
&
460 CIFS_MOUNT_MAP_SPECIAL_CHR
);
462 cFYI(1, ("GetSrvInodeNum rc %d", rc1
));
463 /* BB EOPNOSUPP disable SERVER_INUM? */
464 } else /* do we need cast or hash to ino? */
465 (*pinode
)->i_ino
= inode_num
;
466 } /* else ino incremented to unique num in new_inode*/
467 if (sb
->s_flags
& MS_NOATIME
)
468 (*pinode
)->i_flags
|= S_NOATIME
| S_NOCMTIME
;
469 insert_inode_hash(*pinode
);
472 cifsInfo
= CIFS_I(inode
);
473 cifsInfo
->cifsAttrs
= attr
;
474 cFYI(1, ("Old time %ld", cifsInfo
->time
));
475 cifsInfo
->time
= jiffies
;
476 cFYI(1, ("New time %ld", cifsInfo
->time
));
478 /* blksize needs to be multiple of two. So safer to default to
479 blksize and blkbits set in superblock so 2**blkbits and blksize
480 will match rather than setting to:
481 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
483 /* Linux can not store file creation time so ignore it */
484 if (pfindData
->LastAccessTime
)
485 inode
->i_atime
= cifs_NTtimeToUnix
486 (le64_to_cpu(pfindData
->LastAccessTime
));
487 else /* do not need to use current_fs_time - time not stored */
488 inode
->i_atime
= CURRENT_TIME
;
490 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastWriteTime
));
492 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->ChangeTime
));
493 cFYI(0, ("Attributes came in as 0x%x", attr
));
494 if (adjustTZ
&& (pTcon
->ses
) && (pTcon
->ses
->server
)) {
495 inode
->i_ctime
.tv_sec
+= pTcon
->ses
->server
->timeAdj
;
496 inode
->i_mtime
.tv_sec
+= pTcon
->ses
->server
->timeAdj
;
499 /* set default mode. will override for dirs below */
500 if (atomic_read(&cifsInfo
->inUse
) == 0)
501 /* new inode, can safely set these fields */
502 inode
->i_mode
= cifs_sb
->mnt_file_mode
;
503 else /* since we set the inode type below we need to mask off
504 to avoid strange results if type changes and both
506 inode
->i_mode
&= ~S_IFMT
;
507 /* if (attr & ATTR_REPARSE) */
508 /* We no longer handle these as symlinks because we could not
509 follow them due to the absolute path with drive letter */
510 if (attr
& ATTR_DIRECTORY
) {
511 /* override default perms since we do not do byte range locking
513 inode
->i_mode
= cifs_sb
->mnt_dir_mode
;
514 inode
->i_mode
|= S_IFDIR
;
515 } else if ((cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_UNX_EMUL
) &&
516 (cifsInfo
->cifsAttrs
& ATTR_SYSTEM
) &&
517 /* No need to le64 convert size of zero */
518 (pfindData
->EndOfFile
== 0)) {
519 inode
->i_mode
= cifs_sb
->mnt_file_mode
;
520 inode
->i_mode
|= S_IFIFO
;
521 /* BB Finish for SFU style symlinks and devices */
522 } else if ((cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_UNX_EMUL
) &&
523 (cifsInfo
->cifsAttrs
& ATTR_SYSTEM
)) {
524 if (decode_sfu_inode(inode
,
525 le64_to_cpu(pfindData
->EndOfFile
),
528 cFYI(1, ("Unrecognized sfu inode type"));
530 cFYI(1, ("sfu mode 0%o", inode
->i_mode
));
532 inode
->i_mode
|= S_IFREG
;
533 /* treat the dos attribute of read-only as read-only
535 if (cifsInfo
->cifsAttrs
& ATTR_READONLY
)
536 inode
->i_mode
&= ~(S_IWUGO
);
537 else if ((inode
->i_mode
& S_IWUGO
) == 0)
538 /* the ATTR_READONLY flag may have been */
539 /* changed on server -- set any w bits */
540 /* allowed by mnt_file_mode */
541 inode
->i_mode
|= (S_IWUGO
&
542 cifs_sb
->mnt_file_mode
);
543 /* BB add code here -
544 validate if device or weird share or device type? */
547 spin_lock(&inode
->i_lock
);
548 if (is_size_safe_to_change(cifsInfo
,
549 le64_to_cpu(pfindData
->EndOfFile
))) {
550 /* can not safely shrink the file size here if the
551 client is writing to it due to potential races */
552 i_size_write(inode
, le64_to_cpu(pfindData
->EndOfFile
));
554 /* 512 bytes (2**9) is the fake blocksize that must be
555 used for this calculation */
556 inode
->i_blocks
= (512 - 1 + le64_to_cpu(
557 pfindData
->AllocationSize
)) >> 9;
559 spin_unlock(&inode
->i_lock
);
561 inode
->i_nlink
= le32_to_cpu(pfindData
->NumberOfLinks
);
563 /* BB fill in uid and gid here? with help from winbind?
564 or retrieve from NTFS stream extended attribute */
565 #ifdef CONFIG_CIFS_EXPERIMENTAL
566 /* fill in 0777 bits from ACL */
567 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_CIFS_ACL
) {
568 cFYI(1, ("Getting mode bits from ACL"));
569 acl_to_uid_mode(inode
, full_path
, pfid
);
572 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_UNX_EMUL
) {
573 /* fill in remaining high mode bits e.g. SUID, VTX */
574 get_sfu_mode(inode
, full_path
, cifs_sb
, xid
);
575 } else if (atomic_read(&cifsInfo
->inUse
) == 0) {
576 inode
->i_uid
= cifs_sb
->mnt_uid
;
577 inode
->i_gid
= cifs_sb
->mnt_gid
;
578 /* set so we do not keep refreshing these fields with
579 bad data after user has changed them in memory */
580 atomic_set(&cifsInfo
->inUse
, 1);
583 cifs_set_ops(inode
, is_dfs_referral
);
590 static const struct inode_operations cifs_ipc_inode_ops
= {
591 .lookup
= cifs_lookup
,
594 /* gets root inode */
595 struct inode
*cifs_iget(struct super_block
*sb
, unsigned long ino
)
598 struct cifs_sb_info
*cifs_sb
;
602 inode
= iget_locked(sb
, ino
);
604 return ERR_PTR(-ENOMEM
);
605 if (!(inode
->i_state
& I_NEW
))
608 cifs_sb
= CIFS_SB(inode
->i_sb
);
611 if (cifs_sb
->tcon
->unix_ext
)
612 rc
= cifs_get_inode_info_unix(&inode
, "", inode
->i_sb
, xid
);
614 rc
= cifs_get_inode_info(&inode
, "", NULL
, inode
->i_sb
, xid
,
616 if (rc
&& cifs_sb
->tcon
->ipc
) {
617 cFYI(1, ("ipc connection - fake read inode"));
618 inode
->i_mode
|= S_IFDIR
;
620 inode
->i_op
= &cifs_ipc_inode_ops
;
621 inode
->i_fop
= &simple_dir_operations
;
622 inode
->i_uid
= cifs_sb
->mnt_uid
;
623 inode
->i_gid
= cifs_sb
->mnt_gid
;
629 unlock_new_inode(inode
);
631 /* can not call macro FreeXid here since in a void func
632 * TODO: This is no longer true
638 int cifs_unlink(struct inode
*inode
, struct dentry
*direntry
)
642 struct cifs_sb_info
*cifs_sb
;
643 struct cifsTconInfo
*pTcon
;
644 char *full_path
= NULL
;
645 struct cifsInodeInfo
*cifsInode
;
646 FILE_BASIC_INFO
*pinfo_buf
;
648 cFYI(1, ("cifs_unlink, inode = 0x%p", inode
));
653 cifs_sb
= CIFS_SB(inode
->i_sb
);
655 cifs_sb
= CIFS_SB(direntry
->d_sb
);
656 pTcon
= cifs_sb
->tcon
;
658 /* Unlink can be called from rename so we can not grab the sem here
659 since we deadlock otherwise */
660 /* mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/
661 full_path
= build_path_from_dentry(direntry
);
662 /* mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/
663 if (full_path
== NULL
) {
668 if ((pTcon
->ses
->capabilities
& CAP_UNIX
) &&
669 (CIFS_UNIX_POSIX_PATH_OPS_CAP
&
670 le64_to_cpu(pTcon
->fsUnixInfo
.Capability
))) {
671 rc
= CIFSPOSIXDelFile(xid
, pTcon
, full_path
,
672 SMB_POSIX_UNLINK_FILE_TARGET
, cifs_sb
->local_nls
,
673 cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MAP_SPECIAL_CHR
);
674 cFYI(1, ("posix del rc %d", rc
));
675 if ((rc
== 0) || (rc
== -ENOENT
))
676 goto psx_del_no_retry
;
679 rc
= CIFSSMBDelFile(xid
, pTcon
, full_path
, cifs_sb
->local_nls
,
680 cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MAP_SPECIAL_CHR
);
683 if (direntry
->d_inode
)
684 drop_nlink(direntry
->d_inode
);
685 } else if (rc
== -ENOENT
) {
687 } else if (rc
== -ETXTBSY
) {
691 rc
= CIFSSMBOpen(xid
, pTcon
, full_path
, FILE_OPEN
, DELETE
,
692 CREATE_NOT_DIR
| CREATE_DELETE_ON_CLOSE
,
693 &netfid
, &oplock
, NULL
, cifs_sb
->local_nls
,
694 cifs_sb
->mnt_cifs_flags
&
695 CIFS_MOUNT_MAP_SPECIAL_CHR
);
697 CIFSSMBRenameOpenFile(xid
, pTcon
, netfid
, NULL
,
699 cifs_sb
->mnt_cifs_flags
&
700 CIFS_MOUNT_MAP_SPECIAL_CHR
);
701 CIFSSMBClose(xid
, pTcon
, netfid
);
702 if (direntry
->d_inode
)
703 drop_nlink(direntry
->d_inode
);
705 } else if (rc
== -EACCES
) {
706 /* try only if r/o attribute set in local lookup data? */
707 pinfo_buf
= kzalloc(sizeof(FILE_BASIC_INFO
), GFP_KERNEL
);
709 /* ATTRS set to normal clears r/o bit */
710 pinfo_buf
->Attributes
= cpu_to_le32(ATTR_NORMAL
);
711 if (!(pTcon
->ses
->flags
& CIFS_SES_NT4
))
712 rc
= CIFSSMBSetTimes(xid
, pTcon
, full_path
,
715 cifs_sb
->mnt_cifs_flags
&
716 CIFS_MOUNT_MAP_SPECIAL_CHR
);
720 if (rc
== -EOPNOTSUPP
) {
723 /* rc = CIFSSMBSetAttrLegacy(xid, pTcon,
727 For some strange reason it seems that NT4 eats the
728 old setattr call without actually setting the
729 attributes so on to the third attempted workaround
732 /* BB could scan to see if we already have it open
733 and pass in pid of opener to function */
734 rc
= CIFSSMBOpen(xid
, pTcon
, full_path
,
735 FILE_OPEN
, SYNCHRONIZE
|
736 FILE_WRITE_ATTRIBUTES
, 0,
737 &netfid
, &oplock
, NULL
,
739 cifs_sb
->mnt_cifs_flags
&
740 CIFS_MOUNT_MAP_SPECIAL_CHR
);
742 rc
= CIFSSMBSetFileTimes(xid
, pTcon
,
745 CIFSSMBClose(xid
, pTcon
, netfid
);
751 rc
= CIFSSMBDelFile(xid
, pTcon
, full_path
,
753 cifs_sb
->mnt_cifs_flags
&
754 CIFS_MOUNT_MAP_SPECIAL_CHR
);
756 if (direntry
->d_inode
)
757 drop_nlink(direntry
->d_inode
);
758 } else if (rc
== -ETXTBSY
) {
762 rc
= CIFSSMBOpen(xid
, pTcon
, full_path
,
765 CREATE_DELETE_ON_CLOSE
,
766 &netfid
, &oplock
, NULL
,
768 cifs_sb
->mnt_cifs_flags
&
769 CIFS_MOUNT_MAP_SPECIAL_CHR
);
771 CIFSSMBRenameOpenFile(xid
, pTcon
,
774 cifs_sb
->mnt_cifs_flags
&
775 CIFS_MOUNT_MAP_SPECIAL_CHR
);
776 CIFSSMBClose(xid
, pTcon
, netfid
);
777 if (direntry
->d_inode
)
778 drop_nlink(direntry
->d_inode
);
780 /* BB if rc = -ETXTBUSY goto the rename logic BB */
784 if (direntry
->d_inode
) {
785 cifsInode
= CIFS_I(direntry
->d_inode
);
786 cifsInode
->time
= 0; /* will force revalidate to get info
788 direntry
->d_inode
->i_ctime
= current_fs_time(inode
->i_sb
);
791 inode
->i_ctime
= inode
->i_mtime
= current_fs_time(inode
->i_sb
);
792 cifsInode
= CIFS_I(inode
);
793 cifsInode
->time
= 0; /* force revalidate of dir as well */
801 static void posix_fill_in_inode(struct inode
*tmp_inode
,
802 FILE_UNIX_BASIC_INFO
*pData
, int isNewInode
)
804 struct cifsInodeInfo
*cifsInfo
= CIFS_I(tmp_inode
);
806 struct timespec local_mtime
;
808 cifsInfo
->time
= jiffies
;
809 atomic_inc(&cifsInfo
->inUse
);
811 /* save mtime and size */
812 local_mtime
= tmp_inode
->i_mtime
;
813 local_size
= tmp_inode
->i_size
;
815 cifs_unix_info_to_inode(tmp_inode
, pData
, 1);
816 cifs_set_ops(tmp_inode
, false);
818 if (!S_ISREG(tmp_inode
->i_mode
))
822 * No sense invalidating pages for new inode
823 * since we we have not started caching
824 * readahead file data yet.
829 if (timespec_equal(&tmp_inode
->i_mtime
, &local_mtime
) &&
830 (local_size
== tmp_inode
->i_size
)) {
831 cFYI(1, ("inode exists but unchanged"));
833 /* file may have changed on server */
834 cFYI(1, ("invalidate inode, readdir detected change"));
835 invalidate_remote_inode(tmp_inode
);
839 int cifs_mkdir(struct inode
*inode
, struct dentry
*direntry
, int mode
)
843 struct cifs_sb_info
*cifs_sb
;
844 struct cifsTconInfo
*pTcon
;
845 char *full_path
= NULL
;
846 struct inode
*newinode
= NULL
;
848 cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode
, inode
));
852 cifs_sb
= CIFS_SB(inode
->i_sb
);
853 pTcon
= cifs_sb
->tcon
;
855 full_path
= build_path_from_dentry(direntry
);
856 if (full_path
== NULL
) {
861 if ((pTcon
->ses
->capabilities
& CAP_UNIX
) &&
862 (CIFS_UNIX_POSIX_PATH_OPS_CAP
&
863 le64_to_cpu(pTcon
->fsUnixInfo
.Capability
))) {
865 FILE_UNIX_BASIC_INFO
*pInfo
=
866 kzalloc(sizeof(FILE_UNIX_BASIC_INFO
), GFP_KERNEL
);
872 mode
&= ~current
->fs
->umask
;
873 rc
= CIFSPOSIXCreate(xid
, pTcon
, SMB_O_DIRECTORY
| SMB_O_CREAT
,
874 mode
, NULL
/* netfid */, pInfo
, &oplock
,
875 full_path
, cifs_sb
->local_nls
,
876 cifs_sb
->mnt_cifs_flags
&
877 CIFS_MOUNT_MAP_SPECIAL_CHR
);
878 if (rc
== -EOPNOTSUPP
) {
880 goto mkdir_retry_old
;
882 cFYI(1, ("posix mkdir returned 0x%x", rc
));
885 if (pInfo
->Type
== cpu_to_le32(-1)) {
886 /* no return info, go query for it */
890 /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
894 direntry
->d_op
= &cifs_ci_dentry_ops
;
896 direntry
->d_op
= &cifs_dentry_ops
;
898 newinode
= new_inode(inode
->i_sb
);
899 if (newinode
== NULL
) {
903 /* Is an i_ino of zero legal? */
904 /* Are there sanity checks we can use to ensure that
905 the server is really filling in that field? */
906 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
) {
908 (unsigned long)pInfo
->UniqueId
;
909 } /* note ino incremented to unique num in new_inode */
910 if (inode
->i_sb
->s_flags
& MS_NOATIME
)
911 newinode
->i_flags
|= S_NOATIME
| S_NOCMTIME
;
912 newinode
->i_nlink
= 2;
914 insert_inode_hash(newinode
);
915 d_instantiate(direntry
, newinode
);
917 /* we already checked in POSIXCreate whether
918 frame was long enough */
919 posix_fill_in_inode(direntry
->d_inode
,
920 pInfo
, 1 /* NewInode */);
921 #ifdef CONFIG_CIFS_DEBUG2
922 cFYI(1, ("instantiated dentry %p %s to inode %p",
923 direntry
, direntry
->d_name
.name
, newinode
));
925 if (newinode
->i_nlink
!= 2)
926 cFYI(1, ("unexpected number of links %d",
934 /* BB add setting the equivalent of mode via CreateX w/ACLs */
935 rc
= CIFSSMBMkDir(xid
, pTcon
, full_path
, cifs_sb
->local_nls
,
936 cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MAP_SPECIAL_CHR
);
938 cFYI(1, ("cifs_mkdir returned 0x%x", rc
));
944 rc
= cifs_get_inode_info_unix(&newinode
, full_path
,
947 rc
= cifs_get_inode_info(&newinode
, full_path
, NULL
,
948 inode
->i_sb
, xid
, NULL
);
951 direntry
->d_op
= &cifs_ci_dentry_ops
;
953 direntry
->d_op
= &cifs_dentry_ops
;
954 d_instantiate(direntry
, newinode
);
955 /* setting nlink not necessary except in cases where we
956 * failed to get it from the server or was set bogus */
957 if ((direntry
->d_inode
) && (direntry
->d_inode
->i_nlink
< 2))
958 direntry
->d_inode
->i_nlink
= 2;
959 mode
&= ~current
->fs
->umask
;
960 if (pTcon
->unix_ext
) {
961 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SET_UID
) {
962 CIFSSMBUnixSetPerms(xid
, pTcon
, full_path
,
964 (__u64
)current
->fsuid
,
965 (__u64
)current
->fsgid
,
968 cifs_sb
->mnt_cifs_flags
&
969 CIFS_MOUNT_MAP_SPECIAL_CHR
);
971 CIFSSMBUnixSetPerms(xid
, pTcon
, full_path
,
973 (__u64
)-1, 0 /* dev_t */,
975 cifs_sb
->mnt_cifs_flags
&
976 CIFS_MOUNT_MAP_SPECIAL_CHR
);
979 if (!(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_CIFS_ACL
) &&
980 (mode
& S_IWUGO
) == 0) {
981 FILE_BASIC_INFO pInfo
;
982 memset(&pInfo
, 0, sizeof(pInfo
));
983 pInfo
.Attributes
= cpu_to_le32(ATTR_READONLY
);
984 CIFSSMBSetTimes(xid
, pTcon
, full_path
,
985 &pInfo
, cifs_sb
->local_nls
,
986 cifs_sb
->mnt_cifs_flags
&
987 CIFS_MOUNT_MAP_SPECIAL_CHR
);
989 if (direntry
->d_inode
) {
990 direntry
->d_inode
->i_mode
= mode
;
991 direntry
->d_inode
->i_mode
|= S_IFDIR
;
992 if (cifs_sb
->mnt_cifs_flags
&
993 CIFS_MOUNT_SET_UID
) {
994 direntry
->d_inode
->i_uid
=
996 direntry
->d_inode
->i_gid
=
1008 int cifs_rmdir(struct inode
*inode
, struct dentry
*direntry
)
1012 struct cifs_sb_info
*cifs_sb
;
1013 struct cifsTconInfo
*pTcon
;
1014 char *full_path
= NULL
;
1015 struct cifsInodeInfo
*cifsInode
;
1017 cFYI(1, ("cifs_rmdir, inode = 0x%p", inode
));
1021 cifs_sb
= CIFS_SB(inode
->i_sb
);
1022 pTcon
= cifs_sb
->tcon
;
1024 full_path
= build_path_from_dentry(direntry
);
1025 if (full_path
== NULL
) {
1030 rc
= CIFSSMBRmDir(xid
, pTcon
, full_path
, cifs_sb
->local_nls
,
1031 cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MAP_SPECIAL_CHR
);
1035 spin_lock(&direntry
->d_inode
->i_lock
);
1036 i_size_write(direntry
->d_inode
, 0);
1037 clear_nlink(direntry
->d_inode
);
1038 spin_unlock(&direntry
->d_inode
->i_lock
);
1041 cifsInode
= CIFS_I(direntry
->d_inode
);
1042 cifsInode
->time
= 0; /* force revalidate to go get info when
1044 direntry
->d_inode
->i_ctime
= inode
->i_ctime
= inode
->i_mtime
=
1045 current_fs_time(inode
->i_sb
);
1052 int cifs_rename(struct inode
*source_inode
, struct dentry
*source_direntry
,
1053 struct inode
*target_inode
, struct dentry
*target_direntry
)
1057 struct cifs_sb_info
*cifs_sb_source
;
1058 struct cifs_sb_info
*cifs_sb_target
;
1059 struct cifsTconInfo
*pTcon
;
1065 cifs_sb_target
= CIFS_SB(target_inode
->i_sb
);
1066 cifs_sb_source
= CIFS_SB(source_inode
->i_sb
);
1067 pTcon
= cifs_sb_source
->tcon
;
1069 if (pTcon
!= cifs_sb_target
->tcon
) {
1071 return -EXDEV
; /* BB actually could be allowed if same server,
1072 but different share.
1073 Might eventually add support for this */
1076 /* we already have the rename sem so we do not need to grab it again
1077 here to protect the path integrity */
1078 fromName
= build_path_from_dentry(source_direntry
);
1079 toName
= build_path_from_dentry(target_direntry
);
1080 if ((fromName
== NULL
) || (toName
== NULL
)) {
1082 goto cifs_rename_exit
;
1085 rc
= CIFSSMBRename(xid
, pTcon
, fromName
, toName
,
1086 cifs_sb_source
->local_nls
,
1087 cifs_sb_source
->mnt_cifs_flags
&
1088 CIFS_MOUNT_MAP_SPECIAL_CHR
);
1089 if (rc
== -EEXIST
) {
1090 /* check if they are the same file because rename of hardlinked
1092 FILE_UNIX_BASIC_INFO
*info_buf_source
;
1093 FILE_UNIX_BASIC_INFO
*info_buf_target
;
1096 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO
), GFP_KERNEL
);
1097 if (info_buf_source
!= NULL
) {
1098 info_buf_target
= info_buf_source
+ 1;
1099 if (pTcon
->unix_ext
)
1100 rc
= CIFSSMBUnixQPathInfo(xid
, pTcon
, fromName
,
1102 cifs_sb_source
->local_nls
,
1103 cifs_sb_source
->mnt_cifs_flags
&
1104 CIFS_MOUNT_MAP_SPECIAL_CHR
);
1105 /* else rc is still EEXIST so will fall through to
1106 unlink the target and retry rename */
1108 rc
= CIFSSMBUnixQPathInfo(xid
, pTcon
, toName
,
1110 cifs_sb_target
->local_nls
,
1111 /* remap based on source sb */
1112 cifs_sb_source
->mnt_cifs_flags
&
1113 CIFS_MOUNT_MAP_SPECIAL_CHR
);
1116 (info_buf_source
->UniqueId
==
1117 info_buf_target
->UniqueId
)) {
1118 /* do not rename since the files are hardlinked which
1121 /* we either can not tell the files are hardlinked
1122 (as with Windows servers) or files are not
1123 hardlinked so delete the target manually before
1124 renaming to follow POSIX rather than Windows
1126 cifs_unlink(target_inode
, target_direntry
);
1127 rc
= CIFSSMBRename(xid
, pTcon
, fromName
,
1129 cifs_sb_source
->local_nls
,
1130 cifs_sb_source
->mnt_cifs_flags
1131 & CIFS_MOUNT_MAP_SPECIAL_CHR
);
1133 kfree(info_buf_source
);
1134 } /* if we can not get memory just leave rc as EEXIST */
1138 cFYI(1, ("rename rc %d", rc
));
1140 if ((rc
== -EIO
) || (rc
== -EEXIST
)) {
1144 /* BB FIXME Is Generic Read correct for rename? */
1145 /* if renaming directory - we should not say CREATE_NOT_DIR,
1146 need to test renaming open directory, also GENERIC_READ
1147 might not right be right access to request */
1148 rc
= CIFSSMBOpen(xid
, pTcon
, fromName
, FILE_OPEN
, GENERIC_READ
,
1149 CREATE_NOT_DIR
, &netfid
, &oplock
, NULL
,
1150 cifs_sb_source
->local_nls
,
1151 cifs_sb_source
->mnt_cifs_flags
&
1152 CIFS_MOUNT_MAP_SPECIAL_CHR
);
1154 rc
= CIFSSMBRenameOpenFile(xid
, pTcon
, netfid
, toName
,
1155 cifs_sb_source
->local_nls
,
1156 cifs_sb_source
->mnt_cifs_flags
&
1157 CIFS_MOUNT_MAP_SPECIAL_CHR
);
1158 CIFSSMBClose(xid
, pTcon
, netfid
);
1169 int cifs_revalidate(struct dentry
*direntry
)
1172 int rc
= 0, wbrc
= 0;
1174 struct cifs_sb_info
*cifs_sb
;
1175 struct cifsInodeInfo
*cifsInode
;
1177 struct timespec local_mtime
;
1178 bool invalidate_inode
= false;
1180 if (direntry
->d_inode
== NULL
)
1183 cifsInode
= CIFS_I(direntry
->d_inode
);
1185 if (cifsInode
== NULL
)
1188 /* no sense revalidating inode info on file that no one can write */
1189 if (CIFS_I(direntry
->d_inode
)->clientCanCacheRead
)
1194 cifs_sb
= CIFS_SB(direntry
->d_sb
);
1196 /* can not safely grab the rename sem here if rename calls revalidate
1197 since that would deadlock */
1198 full_path
= build_path_from_dentry(direntry
);
1199 if (full_path
== NULL
) {
1203 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1204 "jiffies %ld", full_path
, direntry
->d_inode
,
1205 direntry
->d_inode
->i_count
.counter
, direntry
,
1206 direntry
->d_time
, jiffies
));
1208 if (cifsInode
->time
== 0) {
1209 /* was set to zero previously to force revalidate */
1210 } else if (time_before(jiffies
, cifsInode
->time
+ HZ
) &&
1211 lookupCacheEnabled
) {
1212 if ((S_ISREG(direntry
->d_inode
->i_mode
) == 0) ||
1213 (direntry
->d_inode
->i_nlink
== 1)) {
1218 cFYI(1, ("Have to revalidate file due to hardlinks"));
1222 /* save mtime and size */
1223 local_mtime
= direntry
->d_inode
->i_mtime
;
1224 local_size
= direntry
->d_inode
->i_size
;
1226 if (cifs_sb
->tcon
->unix_ext
) {
1227 rc
= cifs_get_inode_info_unix(&direntry
->d_inode
, full_path
,
1228 direntry
->d_sb
, xid
);
1230 cFYI(1, ("error on getting revalidate info %d", rc
));
1231 /* if (rc != -ENOENT)
1232 rc = 0; */ /* BB should we cache info on
1236 rc
= cifs_get_inode_info(&direntry
->d_inode
, full_path
, NULL
,
1237 direntry
->d_sb
, xid
, NULL
);
1239 cFYI(1, ("error on getting revalidate info %d", rc
));
1240 /* if (rc != -ENOENT)
1241 rc = 0; */ /* BB should we cache info on
1245 /* should we remap certain errors, access denied?, to zero */
1247 /* if not oplocked, we invalidate inode pages if mtime or file size
1248 had changed on server */
1250 if (timespec_equal(&local_mtime
, &direntry
->d_inode
->i_mtime
) &&
1251 (local_size
== direntry
->d_inode
->i_size
)) {
1252 cFYI(1, ("cifs_revalidate - inode unchanged"));
1254 /* file may have changed on server */
1255 if (cifsInode
->clientCanCacheRead
) {
1256 /* no need to invalidate inode pages since we were the
1257 only ones who could have modified the file and the
1258 server copy is staler than ours */
1260 invalidate_inode
= true;
1264 /* can not grab this sem since kernel filesys locking documentation
1265 indicates i_mutex may be taken by the kernel on lookup and rename
1266 which could deadlock if we grab the i_mutex here as well */
1267 /* mutex_lock(&direntry->d_inode->i_mutex);*/
1268 /* need to write out dirty pages here */
1269 if (direntry
->d_inode
->i_mapping
) {
1270 /* do we need to lock inode until after invalidate completes
1272 wbrc
= filemap_fdatawrite(direntry
->d_inode
->i_mapping
);
1274 CIFS_I(direntry
->d_inode
)->write_behind_rc
= wbrc
;
1276 if (invalidate_inode
) {
1277 /* shrink_dcache not necessary now that cifs dentry ops
1278 are exported for negative dentries */
1279 /* if (S_ISDIR(direntry->d_inode->i_mode))
1280 shrink_dcache_parent(direntry); */
1281 if (S_ISREG(direntry
->d_inode
->i_mode
)) {
1282 if (direntry
->d_inode
->i_mapping
)
1283 wbrc
= filemap_fdatawait(direntry
->d_inode
->i_mapping
);
1285 CIFS_I(direntry
->d_inode
)->write_behind_rc
= wbrc
;
1286 /* may eventually have to do this for open files too */
1287 if (list_empty(&(cifsInode
->openFileList
))) {
1288 /* changed on server - flush read ahead pages */
1289 cFYI(1, ("Invalidating read ahead data on "
1291 invalidate_remote_inode(direntry
->d_inode
);
1295 /* mutex_unlock(&direntry->d_inode->i_mutex); */
1302 int cifs_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
,
1305 int err
= cifs_revalidate(dentry
);
1307 generic_fillattr(dentry
->d_inode
, stat
);
1308 stat
->blksize
= CIFS_MAX_MSGSIZE
;
1313 static int cifs_truncate_page(struct address_space
*mapping
, loff_t from
)
1315 pgoff_t index
= from
>> PAGE_CACHE_SHIFT
;
1316 unsigned offset
= from
& (PAGE_CACHE_SIZE
- 1);
1320 page
= grab_cache_page(mapping
, index
);
1324 zero_user_segment(page
, offset
, PAGE_CACHE_SIZE
);
1326 page_cache_release(page
);
1330 static int cifs_vmtruncate(struct inode
*inode
, loff_t offset
)
1332 struct address_space
*mapping
= inode
->i_mapping
;
1333 unsigned long limit
;
1335 spin_lock(&inode
->i_lock
);
1336 if (inode
->i_size
< offset
)
1339 * truncation of in-use swapfiles is disallowed - it would cause
1340 * subsequent swapout to scribble on the now-freed blocks.
1342 if (IS_SWAPFILE(inode
)) {
1343 spin_unlock(&inode
->i_lock
);
1346 i_size_write(inode
, offset
);
1347 spin_unlock(&inode
->i_lock
);
1349 * unmap_mapping_range is called twice, first simply for efficiency
1350 * so that truncate_inode_pages does fewer single-page unmaps. However
1351 * after this first call, and before truncate_inode_pages finishes,
1352 * it is possible for private pages to be COWed, which remain after
1353 * truncate_inode_pages finishes, hence the second unmap_mapping_range
1354 * call must be made for correctness.
1356 unmap_mapping_range(mapping
, offset
+ PAGE_SIZE
- 1, 0, 1);
1357 truncate_inode_pages(mapping
, offset
);
1358 unmap_mapping_range(mapping
, offset
+ PAGE_SIZE
- 1, 0, 1);
1362 limit
= current
->signal
->rlim
[RLIMIT_FSIZE
].rlim_cur
;
1363 if (limit
!= RLIM_INFINITY
&& offset
> limit
) {
1364 spin_unlock(&inode
->i_lock
);
1367 if (offset
> inode
->i_sb
->s_maxbytes
) {
1368 spin_unlock(&inode
->i_lock
);
1371 i_size_write(inode
, offset
);
1372 spin_unlock(&inode
->i_lock
);
1374 if (inode
->i_op
&& inode
->i_op
->truncate
)
1375 inode
->i_op
->truncate(inode
);
1378 send_sig(SIGXFSZ
, current
, 0);
1385 int cifs_setattr(struct dentry
*direntry
, struct iattr
*attrs
)
1388 struct cifs_sb_info
*cifs_sb
;
1389 struct cifsTconInfo
*pTcon
;
1390 char *full_path
= NULL
;
1392 struct cifsFileInfo
*open_file
= NULL
;
1393 FILE_BASIC_INFO time_buf
;
1394 bool set_time
= false;
1395 bool set_dosattr
= false;
1396 __u64 mode
= 0xFFFFFFFFFFFFFFFFULL
;
1397 __u64 uid
= 0xFFFFFFFFFFFFFFFFULL
;
1398 __u64 gid
= 0xFFFFFFFFFFFFFFFFULL
;
1399 struct cifsInodeInfo
*cifsInode
;
1400 struct inode
*inode
= direntry
->d_inode
;
1404 cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1405 direntry
->d_name
.name
, attrs
->ia_valid
));
1407 cifs_sb
= CIFS_SB(inode
->i_sb
);
1408 pTcon
= cifs_sb
->tcon
;
1410 if ((cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_PERM
) == 0) {
1411 /* check if we have permission to change attrs */
1412 rc
= inode_change_ok(inode
, attrs
);
1420 full_path
= build_path_from_dentry(direntry
);
1421 if (full_path
== NULL
) {
1425 cifsInode
= CIFS_I(inode
);
1427 if ((attrs
->ia_valid
& ATTR_MTIME
) || (attrs
->ia_valid
& ATTR_SIZE
)) {
1429 Flush data before changing file size or changing the last
1430 write time of the file on the server. If the
1431 flush returns error, store it to report later and continue.
1432 BB: This should be smarter. Why bother flushing pages that
1433 will be truncated anyway? Also, should we error out here if
1434 the flush returns error?
1436 rc
= filemap_write_and_wait(inode
->i_mapping
);
1438 cifsInode
->write_behind_rc
= rc
;
1443 if (attrs
->ia_valid
& ATTR_SIZE
) {
1444 /* To avoid spurious oplock breaks from server, in the case of
1445 inodes that we already have open, avoid doing path based
1446 setting of file size if we can do it by handle.
1447 This keeps our caching token (oplock) and avoids timeouts
1448 when the local oplock break takes longer to flush
1449 writebehind data than the SMB timeout for the SetPathInfo
1450 request would allow */
1452 open_file
= find_writable_file(cifsInode
);
1454 __u16 nfid
= open_file
->netfid
;
1455 __u32 npid
= open_file
->pid
;
1456 rc
= CIFSSMBSetFileSize(xid
, pTcon
, attrs
->ia_size
,
1458 atomic_dec(&open_file
->wrtPending
);
1459 cFYI(1, ("SetFSize for attrs rc = %d", rc
));
1460 if ((rc
== -EINVAL
) || (rc
== -EOPNOTSUPP
)) {
1461 unsigned int bytes_written
;
1462 rc
= CIFSSMBWrite(xid
, pTcon
,
1463 nfid
, 0, attrs
->ia_size
,
1464 &bytes_written
, NULL
, NULL
,
1465 1 /* 45 seconds */);
1466 cFYI(1, ("Wrt seteof rc %d", rc
));
1472 /* Set file size by pathname rather than by handle
1473 either because no valid, writeable file handle for
1474 it was found or because there was an error setting
1476 rc
= CIFSSMBSetEOF(xid
, pTcon
, full_path
,
1477 attrs
->ia_size
, false,
1479 cifs_sb
->mnt_cifs_flags
&
1480 CIFS_MOUNT_MAP_SPECIAL_CHR
);
1481 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc
));
1482 if ((rc
== -EINVAL
) || (rc
== -EOPNOTSUPP
)) {
1486 rc
= SMBLegacyOpen(xid
, pTcon
, full_path
,
1487 FILE_OPEN
, GENERIC_WRITE
,
1488 CREATE_NOT_DIR
, &netfid
, &oplock
,
1489 NULL
, cifs_sb
->local_nls
,
1490 cifs_sb
->mnt_cifs_flags
&
1491 CIFS_MOUNT_MAP_SPECIAL_CHR
);
1493 unsigned int bytes_written
;
1494 rc
= CIFSSMBWrite(xid
, pTcon
,
1497 &bytes_written
, NULL
,
1498 NULL
, 1 /* 45 sec */);
1499 cFYI(1, ("wrt seteof rc %d", rc
));
1500 CIFSSMBClose(xid
, pTcon
, netfid
);
1506 /* Server is ok setting allocation size implicitly - no need
1508 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, true,
1509 cifs_sb->local_nls);
1513 rc
= cifs_vmtruncate(inode
, attrs
->ia_size
);
1514 cifs_truncate_page(inode
->i_mapping
, inode
->i_size
);
1516 goto cifs_setattr_exit
;
1518 if (attrs
->ia_valid
& ATTR_UID
) {
1519 cFYI(1, ("UID changed to %d", attrs
->ia_uid
));
1520 uid
= attrs
->ia_uid
;
1522 if (attrs
->ia_valid
& ATTR_GID
) {
1523 cFYI(1, ("GID changed to %d", attrs
->ia_gid
));
1524 gid
= attrs
->ia_gid
;
1527 time_buf
.Attributes
= 0;
1529 /* skip mode change if it's just for clearing setuid/setgid */
1530 if (attrs
->ia_valid
& (ATTR_KILL_SUID
|ATTR_KILL_SGID
))
1531 attrs
->ia_valid
&= ~ATTR_MODE
;
1533 if (attrs
->ia_valid
& ATTR_MODE
) {
1534 cFYI(1, ("Mode changed to 0x%x", attrs
->ia_mode
));
1535 mode
= attrs
->ia_mode
;
1538 if ((pTcon
->unix_ext
)
1539 && (attrs
->ia_valid
& (ATTR_MODE
| ATTR_GID
| ATTR_UID
)))
1540 rc
= CIFSSMBUnixSetPerms(xid
, pTcon
, full_path
, mode
, uid
, gid
,
1541 0 /* dev_t */, cifs_sb
->local_nls
,
1542 cifs_sb
->mnt_cifs_flags
&
1543 CIFS_MOUNT_MAP_SPECIAL_CHR
);
1544 else if (attrs
->ia_valid
& ATTR_MODE
) {
1546 #ifdef CONFIG_CIFS_EXPERIMENTAL
1547 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_CIFS_ACL
)
1548 rc
= mode_to_acl(inode
, full_path
, mode
);
1549 else if ((mode
& S_IWUGO
) == 0) {
1551 if ((mode
& S_IWUGO
) == 0) {
1554 if ((cifsInode
->cifsAttrs
& ATTR_READONLY
) == 0) {
1556 time_buf
.Attributes
=
1557 cpu_to_le32(cifsInode
->cifsAttrs
|
1560 } else if (cifsInode
->cifsAttrs
& ATTR_READONLY
) {
1561 /* If file is readonly on server, we would
1562 not be able to write to it - so if any write
1563 bit is enabled for user or group or other we
1564 need to at least try to remove r/o dos attr */
1566 time_buf
.Attributes
= cpu_to_le32(cifsInode
->cifsAttrs
&
1568 /* Windows ignores set to zero */
1569 if (time_buf
.Attributes
== 0)
1570 time_buf
.Attributes
|= cpu_to_le32(ATTR_NORMAL
);
1574 if (attrs
->ia_valid
& ATTR_ATIME
) {
1576 time_buf
.LastAccessTime
=
1577 cpu_to_le64(cifs_UnixTimeToNT(attrs
->ia_atime
));
1579 time_buf
.LastAccessTime
= 0;
1581 if (attrs
->ia_valid
& ATTR_MTIME
) {
1583 time_buf
.LastWriteTime
=
1584 cpu_to_le64(cifs_UnixTimeToNT(attrs
->ia_mtime
));
1586 time_buf
.LastWriteTime
= 0;
1587 /* Do not set ctime explicitly unless other time
1588 stamps are changed explicitly (i.e. by utime()
1589 since we would then have a mix of client and
1592 if (set_time
&& (attrs
->ia_valid
& ATTR_CTIME
)) {
1594 /* Although Samba throws this field away
1595 it may be useful to Windows - but we do
1596 not want to set ctime unless some other
1597 timestamp is changing */
1598 cFYI(1, ("CIFS - CTIME changed"));
1599 time_buf
.ChangeTime
=
1600 cpu_to_le64(cifs_UnixTimeToNT(attrs
->ia_ctime
));
1602 time_buf
.ChangeTime
= 0;
1604 if (set_time
|| set_dosattr
) {
1605 time_buf
.CreationTime
= 0; /* do not change */
1606 /* In the future we should experiment - try setting timestamps
1607 via Handle (SetFileInfo) instead of by path */
1608 if (!(pTcon
->ses
->flags
& CIFS_SES_NT4
))
1609 rc
= CIFSSMBSetTimes(xid
, pTcon
, full_path
, &time_buf
,
1611 cifs_sb
->mnt_cifs_flags
&
1612 CIFS_MOUNT_MAP_SPECIAL_CHR
);
1616 if (rc
== -EOPNOTSUPP
) {
1620 cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1621 "times not supported by this server"));
1622 /* BB we could scan to see if we already have it open
1623 and pass in pid of opener to function */
1624 rc
= CIFSSMBOpen(xid
, pTcon
, full_path
, FILE_OPEN
,
1625 SYNCHRONIZE
| FILE_WRITE_ATTRIBUTES
,
1626 CREATE_NOT_DIR
, &netfid
, &oplock
,
1627 NULL
, cifs_sb
->local_nls
,
1628 cifs_sb
->mnt_cifs_flags
&
1629 CIFS_MOUNT_MAP_SPECIAL_CHR
);
1631 rc
= CIFSSMBSetFileTimes(xid
, pTcon
, &time_buf
,
1633 CIFSSMBClose(xid
, pTcon
, netfid
);
1635 /* BB For even older servers we could convert time_buf
1636 into old DOS style which uses two second
1639 /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1640 &time_buf, cifs_sb->local_nls); */
1643 /* Even if error on time set, no sense failing the call if
1644 the server would set the time to a reasonable value anyway,
1645 and this check ensures that we are not being called from
1646 sys_utimes in which case we ought to fail the call back to
1647 the user when the server rejects the call */
1648 if ((rc
) && (attrs
->ia_valid
&
1649 (ATTR_MODE
| ATTR_GID
| ATTR_UID
| ATTR_SIZE
)))
1653 /* do not need local check to inode_check_ok since the server does
1656 rc
= inode_setattr(inode
, attrs
);
1664 void cifs_delete_inode(struct inode
*inode
)
1666 cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode
));
1667 /* may have to add back in if and when safe distributed caching of
1668 directories added e.g. via FindNotify */