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);
166 * Needed to setup inode data for the directory which is the
167 * junction to the new submount (ie to setup the fake directory
168 * which represents a DFS referral)
170 static void fill_fake_finddataunix(FILE_UNIX_BASIC_INFO *pfnd_dat,
171 struct super_block *sb)
173 struct inode *pinode = NULL;
175 memset(pfnd_dat, 0, sizeof(FILE_UNIX_BASIC_INFO));
177 /* __le64 pfnd_dat->EndOfFile = cpu_to_le64(0);
178 __le64 pfnd_dat->NumOfBytes = cpu_to_le64(0);
179 __u64 UniqueId = 0; */
180 pfnd_dat->LastStatusChange =
181 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
182 pfnd_dat->LastAccessTime =
183 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
184 pfnd_dat->LastModificationTime =
185 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
186 pfnd_dat->Type = cpu_to_le32(UNIX_DIR);
187 pfnd_dat->Permissions = cpu_to_le64(S_IXUGO | S_IRWXU);
188 pfnd_dat->Nlinks = cpu_to_le64(2);
190 pinode = sb->s_root->d_inode;
194 /* fill in default values for the remaining based on root
195 inode since we can not query the server for this inode info */
196 pfnd_dat->DevMajor = cpu_to_le64(MAJOR(pinode->i_rdev));
197 pfnd_dat->DevMinor = cpu_to_le64(MINOR(pinode->i_rdev));
198 pfnd_dat->Uid = cpu_to_le64(pinode->i_uid);
199 pfnd_dat->Gid = cpu_to_le64(pinode->i_gid);
202 int cifs_get_inode_info_unix(struct inode **pinode,
203 const unsigned char *full_path, struct super_block *sb, int xid)
206 FILE_UNIX_BASIC_INFO find_data;
207 struct cifsTconInfo *pTcon;
209 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
210 bool is_dfs_referral = false;
211 struct cifsInodeInfo *cifsInfo;
215 pTcon = cifs_sb->tcon;
216 cFYI(1, ("Getting info on %s", full_path));
218 /* could have done a find first instead but this returns more info */
219 rc = CIFSSMBUnixQPathInfo(xid, pTcon, full_path, &find_data,
220 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
221 CIFS_MOUNT_MAP_SPECIAL_CHR);
222 if (rc == -EREMOTE && !is_dfs_referral) {
223 is_dfs_referral = true;
224 cFYI(DBG2, ("DFS ref"));
225 /* for DFS, server does not give us real inode data */
226 fill_fake_finddataunix(&find_data, sb);
231 num_of_bytes = le64_to_cpu(find_data.NumOfBytes);
232 end_of_file = le64_to_cpu(find_data.EndOfFile);
235 if (*pinode == NULL) {
236 *pinode = new_inode(sb);
237 if (*pinode == NULL) {
241 /* Is an i_ino of zero legal? */
242 /* note ino incremented to unique num in new_inode */
243 /* Are there sanity checks we can use to ensure that
244 the server is really filling in that field? */
245 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
246 (*pinode)->i_ino = (unsigned long)find_data.UniqueId;
248 if (sb->s_flags & MS_NOATIME)
249 (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
251 insert_inode_hash(*pinode);
255 cifsInfo = CIFS_I(inode);
257 cFYI(1, ("Old time %ld", cifsInfo->time));
258 cifsInfo->time = jiffies;
259 cFYI(1, ("New time %ld", cifsInfo->time));
260 /* this is ok to set on every inode revalidate */
261 atomic_set(&cifsInfo->inUse, 1);
263 cifs_unix_info_to_inode(inode, &find_data, 0);
265 if (num_of_bytes < end_of_file)
266 cFYI(1, ("allocation size less than end of file"));
267 cFYI(1, ("Size %ld and blocks %llu",
268 (unsigned long) inode->i_size,
269 (unsigned long long)inode->i_blocks));
271 cifs_set_ops(inode, is_dfs_referral);
276 static int decode_sfu_inode(struct inode *inode, __u64 size,
277 const unsigned char *path,
278 struct cifs_sb_info *cifs_sb, int xid)
283 struct cifsTconInfo *pTcon = cifs_sb->tcon;
285 unsigned int bytes_read;
291 inode->i_mode |= S_IFIFO;
293 } else if (size < 8) {
294 return -EINVAL; /* EOPNOTSUPP? */
297 rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ,
298 CREATE_NOT_DIR, &netfid, &oplock, NULL,
300 cifs_sb->mnt_cifs_flags &
301 CIFS_MOUNT_MAP_SPECIAL_CHR);
303 int buf_type = CIFS_NO_BUFFER;
305 rc = CIFSSMBRead(xid, pTcon,
307 24 /* length */, 0 /* offset */,
308 &bytes_read, &pbuf, &buf_type);
309 if ((rc == 0) && (bytes_read >= 8)) {
310 if (memcmp("IntxBLK", pbuf, 8) == 0) {
311 cFYI(1, ("Block device"));
312 inode->i_mode |= S_IFBLK;
313 if (bytes_read == 24) {
314 /* we have enough to decode dev num */
315 __u64 mjr; /* major */
316 __u64 mnr; /* minor */
317 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
318 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
319 inode->i_rdev = MKDEV(mjr, mnr);
321 } else if (memcmp("IntxCHR", pbuf, 8) == 0) {
322 cFYI(1, ("Char device"));
323 inode->i_mode |= S_IFCHR;
324 if (bytes_read == 24) {
325 /* we have enough to decode dev num */
326 __u64 mjr; /* major */
327 __u64 mnr; /* minor */
328 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
329 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
330 inode->i_rdev = MKDEV(mjr, mnr);
332 } else if (memcmp("IntxLNK", pbuf, 7) == 0) {
333 cFYI(1, ("Symlink"));
334 inode->i_mode |= S_IFLNK;
336 inode->i_mode |= S_IFREG; /* file? */
340 inode->i_mode |= S_IFREG; /* then it is a file */
341 rc = -EOPNOTSUPP; /* or some unknown SFU type */
343 CIFSSMBClose(xid, pTcon, netfid);
348 #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
350 static int get_sfu_mode(struct inode *inode,
351 const unsigned char *path,
352 struct cifs_sb_info *cifs_sb, int xid)
354 #ifdef CONFIG_CIFS_XATTR
359 rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS",
360 ea_value, 4 /* size of buf */, cifs_sb->local_nls,
361 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
365 mode = le32_to_cpu(*((__le32 *)ea_value));
366 inode->i_mode &= ~SFBITS_MASK;
367 cFYI(1, ("special bits 0%o org mode 0%o", mode, inode->i_mode));
368 inode->i_mode = (mode & SFBITS_MASK) | inode->i_mode;
369 cFYI(1, ("special mode bits 0%o", mode));
380 * Needed to setup inode data for the directory which is the
381 * junction to the new submount (ie to setup the fake directory
382 * which represents a DFS referral)
384 static void fill_fake_finddata(FILE_ALL_INFO *pfnd_dat,
385 struct super_block *sb)
387 memset(pfnd_dat, 0, sizeof(FILE_ALL_INFO));
389 /* __le64 pfnd_dat->AllocationSize = cpu_to_le64(0);
390 __le64 pfnd_dat->EndOfFile = cpu_to_le64(0);
391 __u8 pfnd_dat->DeletePending = 0;
392 __u8 pfnd_data->Directory = 0;
393 __le32 pfnd_dat->EASize = 0;
394 __u64 pfnd_dat->IndexNumber = 0;
395 __u64 pfnd_dat->IndexNumber1 = 0; */
396 pfnd_dat->CreationTime =
397 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
398 pfnd_dat->LastAccessTime =
399 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
400 pfnd_dat->LastWriteTime =
401 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
402 pfnd_dat->ChangeTime =
403 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
404 pfnd_dat->Attributes = cpu_to_le32(ATTR_DIRECTORY);
405 pfnd_dat->NumberOfLinks = cpu_to_le32(2);
408 int cifs_get_inode_info(struct inode **pinode,
409 const unsigned char *full_path, FILE_ALL_INFO *pfindData,
410 struct super_block *sb, int xid, const __u16 *pfid)
414 struct cifsInodeInfo *cifsInfo;
415 struct cifsTconInfo *pTcon;
417 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
419 bool adjustTZ = false;
420 bool is_dfs_referral = false;
421 umode_t default_mode;
423 pTcon = cifs_sb->tcon;
424 cFYI(1, ("Getting info on %s", full_path));
426 if ((pfindData == NULL) && (*pinode != NULL)) {
427 if (CIFS_I(*pinode)->clientCanCacheRead) {
428 cFYI(1, ("No need to revalidate cached inode sizes"));
433 /* if file info not passed in then get it from server */
434 if (pfindData == NULL) {
435 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
438 pfindData = (FILE_ALL_INFO *)buf;
440 /* could do find first instead but this returns more info */
441 rc = CIFSSMBQPathInfo(xid, pTcon, full_path, pfindData,
443 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
444 CIFS_MOUNT_MAP_SPECIAL_CHR);
445 /* BB optimize code so we do not make the above call
446 when server claims no NT SMB support and the above call
447 failed at least once - set flag in tcon or mount */
448 if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
449 rc = SMBQueryInformation(xid, pTcon, full_path,
450 pfindData, cifs_sb->local_nls,
451 cifs_sb->mnt_cifs_flags &
452 CIFS_MOUNT_MAP_SPECIAL_CHR);
456 /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
457 if (rc == -EREMOTE) {
458 is_dfs_referral = true;
459 fill_fake_finddata(pfindData, sb);
464 attr = le32_to_cpu(pfindData->Attributes);
467 if (*pinode == NULL) {
468 *pinode = new_inode(sb);
469 if (*pinode == NULL) {
473 /* Is an i_ino of zero legal? Can we use that to check
474 if the server supports returning inode numbers? Are
475 there other sanity checks we can use to ensure that
476 the server is really filling in that field? */
478 /* We can not use the IndexNumber field by default from
479 Windows or Samba (in ALL_INFO buf) but we can request
480 it explicitly. It may not be unique presumably if
481 the server has multiple devices mounted under one share */
483 /* There may be higher info levels that work but are
484 there Windows server or network appliances for which
485 IndexNumber field is not guaranteed unique? */
487 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
491 rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
492 full_path, &inode_num,
494 cifs_sb->mnt_cifs_flags &
495 CIFS_MOUNT_MAP_SPECIAL_CHR);
497 cFYI(1, ("GetSrvInodeNum rc %d", rc1));
498 /* BB EOPNOSUPP disable SERVER_INUM? */
499 } else /* do we need cast or hash to ino? */
500 (*pinode)->i_ino = inode_num;
501 } /* else ino incremented to unique num in new_inode*/
502 if (sb->s_flags & MS_NOATIME)
503 (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
504 insert_inode_hash(*pinode);
507 cifsInfo = CIFS_I(inode);
508 cifsInfo->cifsAttrs = attr;
509 cifsInfo->delete_pending = pfindData->DeletePending ? true : false;
510 cFYI(1, ("Old time %ld", cifsInfo->time));
511 cifsInfo->time = jiffies;
512 cFYI(1, ("New time %ld", cifsInfo->time));
514 /* blksize needs to be multiple of two. So safer to default to
515 blksize and blkbits set in superblock so 2**blkbits and blksize
516 will match rather than setting to:
517 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
519 /* Linux can not store file creation time so ignore it */
520 if (pfindData->LastAccessTime)
521 inode->i_atime = cifs_NTtimeToUnix
522 (le64_to_cpu(pfindData->LastAccessTime));
523 else /* do not need to use current_fs_time - time not stored */
524 inode->i_atime = CURRENT_TIME;
526 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
528 cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
529 cFYI(DBG2, ("Attributes came in as 0x%x", attr));
530 if (adjustTZ && (pTcon->ses) && (pTcon->ses->server)) {
531 inode->i_ctime.tv_sec += pTcon->ses->server->timeAdj;
532 inode->i_mtime.tv_sec += pTcon->ses->server->timeAdj;
535 /* get default inode mode */
536 if (attr & ATTR_DIRECTORY)
537 default_mode = cifs_sb->mnt_dir_mode;
539 default_mode = cifs_sb->mnt_file_mode;
541 /* set permission bits */
542 if (atomic_read(&cifsInfo->inUse) == 0 ||
543 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
544 inode->i_mode = default_mode;
546 /* just reenable write bits if !ATTR_READONLY */
547 if ((inode->i_mode & S_IWUGO) == 0 &&
548 (attr & ATTR_READONLY) == 0)
549 inode->i_mode |= (S_IWUGO & default_mode);
551 inode->i_mode &= ~S_IFMT;
553 /* clear write bits if ATTR_READONLY is set */
554 if (attr & ATTR_READONLY)
555 inode->i_mode &= ~S_IWUGO;
558 if ((attr & ATTR_SYSTEM) &&
559 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) {
560 /* no need to fix endianness on 0 */
561 if (pfindData->EndOfFile == 0)
562 inode->i_mode |= S_IFIFO;
563 else if (decode_sfu_inode(inode,
564 le64_to_cpu(pfindData->EndOfFile),
565 full_path, cifs_sb, xid))
566 cFYI(1, ("unknown SFU file type\n"));
568 if (attr & ATTR_DIRECTORY)
569 inode->i_mode |= S_IFDIR;
571 inode->i_mode |= S_IFREG;
574 spin_lock(&inode->i_lock);
575 if (is_size_safe_to_change(cifsInfo,
576 le64_to_cpu(pfindData->EndOfFile))) {
577 /* can not safely shrink the file size here if the
578 client is writing to it due to potential races */
579 i_size_write(inode, le64_to_cpu(pfindData->EndOfFile));
581 /* 512 bytes (2**9) is the fake blocksize that must be
582 used for this calculation */
583 inode->i_blocks = (512 - 1 + le64_to_cpu(
584 pfindData->AllocationSize)) >> 9;
586 spin_unlock(&inode->i_lock);
588 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
590 /* BB fill in uid and gid here? with help from winbind?
591 or retrieve from NTFS stream extended attribute */
592 #ifdef CONFIG_CIFS_EXPERIMENTAL
593 /* fill in 0777 bits from ACL */
594 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
595 cFYI(1, ("Getting mode bits from ACL"));
596 acl_to_uid_mode(inode, full_path, pfid);
599 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
600 /* fill in remaining high mode bits e.g. SUID, VTX */
601 get_sfu_mode(inode, full_path, cifs_sb, xid);
602 } else if (atomic_read(&cifsInfo->inUse) == 0) {
603 inode->i_uid = cifs_sb->mnt_uid;
604 inode->i_gid = cifs_sb->mnt_gid;
605 /* set so we do not keep refreshing these fields with
606 bad data after user has changed them in memory */
607 atomic_set(&cifsInfo->inUse, 1);
610 cifs_set_ops(inode, is_dfs_referral);
620 static const struct inode_operations cifs_ipc_inode_ops = {
621 .lookup = cifs_lookup,
624 /* gets root inode */
625 struct inode *cifs_iget(struct super_block *sb, unsigned long ino)
628 struct cifs_sb_info *cifs_sb;
632 inode = iget_locked(sb, ino);
634 return ERR_PTR(-ENOMEM);
635 if (!(inode->i_state & I_NEW))
638 cifs_sb = CIFS_SB(inode->i_sb);
641 if (cifs_sb->tcon->unix_ext)
642 rc = cifs_get_inode_info_unix(&inode, "", inode->i_sb, xid);
644 rc = cifs_get_inode_info(&inode, "", NULL, inode->i_sb, xid,
646 if (rc && cifs_sb->tcon->ipc) {
647 cFYI(1, ("ipc connection - fake read inode"));
648 inode->i_mode |= S_IFDIR;
650 inode->i_op = &cifs_ipc_inode_ops;
651 inode->i_fop = &simple_dir_operations;
652 inode->i_uid = cifs_sb->mnt_uid;
653 inode->i_gid = cifs_sb->mnt_gid;
660 unlock_new_inode(inode);
662 /* can not call macro FreeXid here since in a void func
663 * TODO: This is no longer true
670 cifs_set_file_info(struct inode *inode, struct iattr *attrs, int xid,
671 char *full_path, __u32 dosattr)
677 bool set_time = false;
678 struct cifsFileInfo *open_file;
679 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
680 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
681 struct cifsTconInfo *pTcon = cifs_sb->tcon;
682 FILE_BASIC_INFO info_buf;
684 if (attrs->ia_valid & ATTR_ATIME) {
686 info_buf.LastAccessTime =
687 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
689 info_buf.LastAccessTime = 0;
691 if (attrs->ia_valid & ATTR_MTIME) {
693 info_buf.LastWriteTime =
694 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
696 info_buf.LastWriteTime = 0;
699 * Samba throws this field away, but windows may actually use it.
700 * Do not set ctime unless other time stamps are changed explicitly
701 * (i.e. by utimes()) since we would then have a mix of client and
704 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
705 cFYI(1, ("CIFS - CTIME changed"));
706 info_buf.ChangeTime =
707 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
709 info_buf.ChangeTime = 0;
711 info_buf.CreationTime = 0; /* don't change */
712 info_buf.Attributes = cpu_to_le32(dosattr);
715 * If the file is already open for write, just use that fileid
717 open_file = find_writable_file(cifsInode);
719 netfid = open_file->netfid;
720 netpid = open_file->pid;
721 goto set_via_filehandle;
725 * NT4 apparently returns success on this call, but it doesn't
728 if (!(pTcon->ses->flags & CIFS_SES_NT4)) {
729 rc = CIFSSMBSetPathInfo(xid, pTcon, full_path,
730 &info_buf, cifs_sb->local_nls,
731 cifs_sb->mnt_cifs_flags &
732 CIFS_MOUNT_MAP_SPECIAL_CHR);
734 cifsInode->cifsAttrs = dosattr;
736 } else if (rc != -EOPNOTSUPP && rc != -EINVAL)
740 cFYI(1, ("calling SetFileInfo since SetPathInfo for "
741 "times not supported by this server"));
742 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
743 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
744 CREATE_NOT_DIR, &netfid, &oplock,
745 NULL, cifs_sb->local_nls,
746 cifs_sb->mnt_cifs_flags &
747 CIFS_MOUNT_MAP_SPECIAL_CHR);
755 netpid = current->tgid;
758 rc = CIFSSMBSetFileInfo(xid, pTcon, &info_buf, netfid, netpid);
760 cifsInode->cifsAttrs = dosattr;
762 if (open_file == NULL)
763 CIFSSMBClose(xid, pTcon, netfid);
765 atomic_dec(&open_file->wrtPending);
771 * open the given file (if it isn't already), set the DELETE_ON_CLOSE bit
772 * and rename it to a random name that hopefully won't conflict with
776 cifs_rename_pending_delete(char *full_path, struct dentry *dentry, int xid)
781 struct inode *inode = dentry->d_inode;
782 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
783 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
784 struct cifsTconInfo *tcon = cifs_sb->tcon;
785 __u32 dosattr, origattr;
786 FILE_BASIC_INFO *info_buf = NULL;
788 rc = CIFSSMBOpen(xid, tcon, full_path, FILE_OPEN,
789 DELETE|FILE_WRITE_ATTRIBUTES, CREATE_NOT_DIR,
790 &netfid, &oplock, NULL, cifs_sb->local_nls,
791 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
795 origattr = cifsInode->cifsAttrs;
797 origattr |= ATTR_NORMAL;
799 dosattr = origattr & ~ATTR_READONLY;
801 dosattr |= ATTR_NORMAL;
802 dosattr |= ATTR_HIDDEN;
804 /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */
805 if (dosattr != origattr) {
806 info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL);
807 if (info_buf == NULL) {
811 info_buf->Attributes = cpu_to_le32(dosattr);
812 rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid,
814 /* although we would like to mark the file hidden
815 if that fails we will still try to rename it */
817 cifsInode->cifsAttrs = dosattr;
819 dosattr = origattr; /* since not able to change them */
822 /* rename the file */
823 rc = CIFSSMBRenameOpenFile(xid, tcon, netfid, NULL, cifs_sb->local_nls,
824 cifs_sb->mnt_cifs_flags &
825 CIFS_MOUNT_MAP_SPECIAL_CHR);
831 /* try to set DELETE_ON_CLOSE */
832 if (!cifsInode->delete_pending) {
833 rc = CIFSSMBSetFileDisposition(xid, tcon, true, netfid,
836 * some samba versions return -ENOENT when we try to set the
837 * file disposition here. Likely a samba bug, but work around
838 * it for now. This means that some cifsXXX files may hang
839 * around after they shouldn't.
841 * BB: remove this hack after more servers have the fix
849 cifsInode->delete_pending = true;
853 CIFSSMBClose(xid, tcon, netfid);
859 * reset everything back to the original state. Don't bother
860 * dealing with errors here since we can't do anything about
864 CIFSSMBRenameOpenFile(xid, tcon, netfid, dentry->d_name.name,
865 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
866 CIFS_MOUNT_MAP_SPECIAL_CHR);
868 if (dosattr != origattr) {
869 info_buf->Attributes = cpu_to_le32(origattr);
870 if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid,
872 cifsInode->cifsAttrs = origattr;
878 int cifs_unlink(struct inode *dir, struct dentry *dentry)
882 char *full_path = NULL;
883 struct inode *inode = dentry->d_inode;
884 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
885 struct super_block *sb = dir->i_sb;
886 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
887 struct cifsTconInfo *tcon = cifs_sb->tcon;
888 struct iattr *attrs = NULL;
889 __u32 dosattr = 0, origattr = 0;
891 cFYI(1, ("cifs_unlink, dir=0x%p, dentry=0x%p", dir, dentry));
895 /* Unlink can be called from rename so we can not take the
896 * sb->s_vfs_rename_mutex here */
897 full_path = build_path_from_dentry(dentry);
898 if (full_path == NULL) {
903 if ((tcon->ses->capabilities & CAP_UNIX) &&
904 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
905 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
906 rc = CIFSPOSIXDelFile(xid, tcon, full_path,
907 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
908 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
909 cFYI(1, ("posix del rc %d", rc));
910 if ((rc == 0) || (rc == -ENOENT))
911 goto psx_del_no_retry;
915 rc = CIFSSMBDelFile(xid, tcon, full_path, cifs_sb->local_nls,
916 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
922 } else if (rc == -ENOENT) {
924 } else if (rc == -ETXTBSY) {
925 rc = cifs_rename_pending_delete(full_path, dentry, xid);
928 } else if (rc == -EACCES && dosattr == 0) {
929 attrs = kzalloc(sizeof(*attrs), GFP_KERNEL);
935 /* try to reset dos attributes */
936 origattr = cifsInode->cifsAttrs;
938 origattr |= ATTR_NORMAL;
939 dosattr = origattr & ~ATTR_READONLY;
941 dosattr |= ATTR_NORMAL;
942 dosattr |= ATTR_HIDDEN;
944 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
948 goto retry_std_delete;
951 /* undo the setattr if we errored out and it's needed */
952 if (rc != 0 && dosattr != 0)
953 cifs_set_file_info(inode, attrs, xid, full_path, origattr);
957 cifsInode = CIFS_I(inode);
958 cifsInode->time = 0; /* will force revalidate to get info
960 inode->i_ctime = current_fs_time(sb);
962 dir->i_ctime = dir->i_mtime = current_fs_time(sb);
963 cifsInode = CIFS_I(dir);
964 CIFS_I(dir)->time = 0; /* force revalidate of dir as well */
972 static void posix_fill_in_inode(struct inode *tmp_inode,
973 FILE_UNIX_BASIC_INFO *pData, int isNewInode)
975 struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
977 struct timespec local_mtime;
979 cifsInfo->time = jiffies;
980 atomic_inc(&cifsInfo->inUse);
982 /* save mtime and size */
983 local_mtime = tmp_inode->i_mtime;
984 local_size = tmp_inode->i_size;
986 cifs_unix_info_to_inode(tmp_inode, pData, 1);
987 cifs_set_ops(tmp_inode, false);
989 if (!S_ISREG(tmp_inode->i_mode))
993 * No sense invalidating pages for new inode
994 * since we we have not started caching
995 * readahead file data yet.
1000 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
1001 (local_size == tmp_inode->i_size)) {
1002 cFYI(1, ("inode exists but unchanged"));
1004 /* file may have changed on server */
1005 cFYI(1, ("invalidate inode, readdir detected change"));
1006 invalidate_remote_inode(tmp_inode);
1010 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
1014 struct cifs_sb_info *cifs_sb;
1015 struct cifsTconInfo *pTcon;
1016 char *full_path = NULL;
1017 struct inode *newinode = NULL;
1019 cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
1023 cifs_sb = CIFS_SB(inode->i_sb);
1024 pTcon = cifs_sb->tcon;
1026 full_path = build_path_from_dentry(direntry);
1027 if (full_path == NULL) {
1032 if ((pTcon->ses->capabilities & CAP_UNIX) &&
1033 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1034 le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
1036 FILE_UNIX_BASIC_INFO *pInfo =
1037 kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1038 if (pInfo == NULL) {
1043 mode &= ~current->fs->umask;
1044 rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT,
1045 mode, NULL /* netfid */, pInfo, &oplock,
1046 full_path, cifs_sb->local_nls,
1047 cifs_sb->mnt_cifs_flags &
1048 CIFS_MOUNT_MAP_SPECIAL_CHR);
1049 if (rc == -EOPNOTSUPP) {
1051 goto mkdir_retry_old;
1053 cFYI(1, ("posix mkdir returned 0x%x", rc));
1056 if (pInfo->Type == cpu_to_le32(-1)) {
1057 /* no return info, go query for it */
1059 goto mkdir_get_info;
1061 /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
1065 direntry->d_op = &cifs_ci_dentry_ops;
1067 direntry->d_op = &cifs_dentry_ops;
1069 newinode = new_inode(inode->i_sb);
1070 if (newinode == NULL) {
1072 goto mkdir_get_info;
1075 /* Is an i_ino of zero legal? */
1076 /* Are there sanity checks we can use to ensure that
1077 the server is really filling in that field? */
1078 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
1080 (unsigned long)pInfo->UniqueId;
1081 } /* note ino incremented to unique num in new_inode */
1082 if (inode->i_sb->s_flags & MS_NOATIME)
1083 newinode->i_flags |= S_NOATIME | S_NOCMTIME;
1084 newinode->i_nlink = 2;
1086 insert_inode_hash(newinode);
1087 d_instantiate(direntry, newinode);
1089 /* we already checked in POSIXCreate whether
1090 frame was long enough */
1091 posix_fill_in_inode(direntry->d_inode,
1092 pInfo, 1 /* NewInode */);
1093 #ifdef CONFIG_CIFS_DEBUG2
1094 cFYI(1, ("instantiated dentry %p %s to inode %p",
1095 direntry, direntry->d_name.name, newinode));
1097 if (newinode->i_nlink != 2)
1098 cFYI(1, ("unexpected number of links %d",
1099 newinode->i_nlink));
1106 /* BB add setting the equivalent of mode via CreateX w/ACLs */
1107 rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
1108 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1110 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
1115 if (pTcon->unix_ext)
1116 rc = cifs_get_inode_info_unix(&newinode, full_path,
1119 rc = cifs_get_inode_info(&newinode, full_path, NULL,
1120 inode->i_sb, xid, NULL);
1123 direntry->d_op = &cifs_ci_dentry_ops;
1125 direntry->d_op = &cifs_dentry_ops;
1126 d_instantiate(direntry, newinode);
1127 /* setting nlink not necessary except in cases where we
1128 * failed to get it from the server or was set bogus */
1129 if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
1130 direntry->d_inode->i_nlink = 2;
1132 mode &= ~current->fs->umask;
1133 /* must turn on setgid bit if parent dir has it */
1134 if (inode->i_mode & S_ISGID)
1137 if (pTcon->unix_ext) {
1138 struct cifs_unix_set_info_args args = {
1140 .ctime = NO_CHANGE_64,
1141 .atime = NO_CHANGE_64,
1142 .mtime = NO_CHANGE_64,
1145 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1146 args.uid = (__u64)current->fsuid;
1147 if (inode->i_mode & S_ISGID)
1148 args.gid = (__u64)inode->i_gid;
1150 args.gid = (__u64)current->fsgid;
1152 args.uid = NO_CHANGE_64;
1153 args.gid = NO_CHANGE_64;
1155 CIFSSMBUnixSetInfo(xid, pTcon, full_path, &args,
1157 cifs_sb->mnt_cifs_flags &
1158 CIFS_MOUNT_MAP_SPECIAL_CHR);
1160 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
1161 (mode & S_IWUGO) == 0) {
1162 FILE_BASIC_INFO pInfo;
1163 struct cifsInodeInfo *cifsInode;
1166 memset(&pInfo, 0, sizeof(pInfo));
1167 cifsInode = CIFS_I(newinode);
1168 dosattrs = cifsInode->cifsAttrs|ATTR_READONLY;
1169 pInfo.Attributes = cpu_to_le32(dosattrs);
1170 tmprc = CIFSSMBSetPathInfo(xid, pTcon,
1173 cifs_sb->mnt_cifs_flags &
1174 CIFS_MOUNT_MAP_SPECIAL_CHR);
1176 cifsInode->cifsAttrs = dosattrs;
1178 if (direntry->d_inode) {
1179 if (cifs_sb->mnt_cifs_flags &
1181 direntry->d_inode->i_mode =
1184 if (cifs_sb->mnt_cifs_flags &
1185 CIFS_MOUNT_SET_UID) {
1186 direntry->d_inode->i_uid =
1188 if (inode->i_mode & S_ISGID)
1189 direntry->d_inode->i_gid =
1192 direntry->d_inode->i_gid =
1204 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1208 struct cifs_sb_info *cifs_sb;
1209 struct cifsTconInfo *pTcon;
1210 char *full_path = NULL;
1211 struct cifsInodeInfo *cifsInode;
1213 cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
1217 cifs_sb = CIFS_SB(inode->i_sb);
1218 pTcon = cifs_sb->tcon;
1220 full_path = build_path_from_dentry(direntry);
1221 if (full_path == NULL) {
1226 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1227 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1231 spin_lock(&direntry->d_inode->i_lock);
1232 i_size_write(direntry->d_inode, 0);
1233 clear_nlink(direntry->d_inode);
1234 spin_unlock(&direntry->d_inode->i_lock);
1237 cifsInode = CIFS_I(direntry->d_inode);
1238 cifsInode->time = 0; /* force revalidate to go get info when
1240 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1241 current_fs_time(inode->i_sb);
1249 cifs_do_rename(int xid, struct dentry *from_dentry, const char *fromPath,
1250 struct dentry *to_dentry, const char *toPath)
1252 struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb);
1253 struct cifsTconInfo *pTcon = cifs_sb->tcon;
1257 /* try path-based rename first */
1258 rc = CIFSSMBRename(xid, pTcon, fromPath, toPath, cifs_sb->local_nls,
1259 cifs_sb->mnt_cifs_flags &
1260 CIFS_MOUNT_MAP_SPECIAL_CHR);
1263 * don't bother with rename by filehandle unless file is busy and
1264 * source Note that cross directory moves do not work with
1265 * rename by filehandle to various Windows servers.
1267 if (rc == 0 || rc != -ETXTBSY)
1270 /* open the file to be renamed -- we need DELETE perms */
1271 rc = CIFSSMBOpen(xid, pTcon, fromPath, FILE_OPEN, DELETE,
1272 CREATE_NOT_DIR, &srcfid, &oplock, NULL,
1273 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
1274 CIFS_MOUNT_MAP_SPECIAL_CHR);
1277 rc = CIFSSMBRenameOpenFile(xid, pTcon, srcfid,
1278 (const char *) to_dentry->d_name.name,
1279 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
1280 CIFS_MOUNT_MAP_SPECIAL_CHR);
1282 CIFSSMBClose(xid, pTcon, srcfid);
1288 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
1289 struct inode *target_inode, struct dentry *target_direntry)
1291 char *fromName = NULL;
1292 char *toName = NULL;
1293 struct cifs_sb_info *cifs_sb_source;
1294 struct cifs_sb_info *cifs_sb_target;
1295 struct cifsTconInfo *pTcon;
1296 FILE_UNIX_BASIC_INFO *info_buf_source = NULL;
1297 FILE_UNIX_BASIC_INFO *info_buf_target;
1301 cifs_sb_target = CIFS_SB(target_inode->i_sb);
1302 cifs_sb_source = CIFS_SB(source_inode->i_sb);
1303 pTcon = cifs_sb_source->tcon;
1308 * BB: this might be allowed if same server, but different share.
1309 * Consider adding support for this
1311 if (pTcon != cifs_sb_target->tcon) {
1313 goto cifs_rename_exit;
1317 * we already have the rename sem so we do not need to
1318 * grab it again here to protect the path integrity
1320 fromName = build_path_from_dentry(source_direntry);
1321 if (fromName == NULL) {
1323 goto cifs_rename_exit;
1326 toName = build_path_from_dentry(target_direntry);
1327 if (toName == NULL) {
1329 goto cifs_rename_exit;
1332 rc = cifs_do_rename(xid, source_direntry, fromName,
1333 target_direntry, toName);
1335 if (rc == -EEXIST) {
1336 if (pTcon->unix_ext) {
1338 * Are src and dst hardlinks of same inode? We can
1339 * only tell with unix extensions enabled
1342 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO),
1344 if (info_buf_source == NULL)
1347 info_buf_target = info_buf_source + 1;
1348 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
1350 cifs_sb_source->local_nls,
1351 cifs_sb_source->mnt_cifs_flags &
1352 CIFS_MOUNT_MAP_SPECIAL_CHR);
1356 rc = CIFSSMBUnixQPathInfo(xid, pTcon,
1357 toName, info_buf_target,
1358 cifs_sb_target->local_nls,
1359 /* remap based on source sb */
1360 cifs_sb_source->mnt_cifs_flags &
1361 CIFS_MOUNT_MAP_SPECIAL_CHR);
1363 if (rc == 0 && (info_buf_source->UniqueId ==
1364 info_buf_target->UniqueId))
1365 /* same file, POSIX says that this is a noop */
1366 goto cifs_rename_exit;
1367 } /* else ... BB we could add the same check for Windows by
1368 checking the UniqueId via FILE_INTERNAL_INFO */
1371 * we either can not tell the files are hardlinked (as with
1372 * Windows servers) or files are not hardlinked. Delete the
1373 * target manually before renaming to follow POSIX rather than
1376 cifs_unlink(target_inode, target_direntry);
1377 rc = cifs_do_rename(xid, source_direntry, fromName,
1378 target_direntry, toName);
1382 kfree(info_buf_source);
1389 int cifs_revalidate(struct dentry *direntry)
1392 int rc = 0, wbrc = 0;
1394 struct cifs_sb_info *cifs_sb;
1395 struct cifsInodeInfo *cifsInode;
1397 struct timespec local_mtime;
1398 bool invalidate_inode = false;
1400 if (direntry->d_inode == NULL)
1403 cifsInode = CIFS_I(direntry->d_inode);
1405 if (cifsInode == NULL)
1408 /* no sense revalidating inode info on file that no one can write */
1409 if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
1414 cifs_sb = CIFS_SB(direntry->d_sb);
1416 /* can not safely grab the rename sem here if rename calls revalidate
1417 since that would deadlock */
1418 full_path = build_path_from_dentry(direntry);
1419 if (full_path == NULL) {
1423 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1424 "jiffies %ld", full_path, direntry->d_inode,
1425 direntry->d_inode->i_count.counter, direntry,
1426 direntry->d_time, jiffies));
1428 if (cifsInode->time == 0) {
1429 /* was set to zero previously to force revalidate */
1430 } else if (time_before(jiffies, cifsInode->time + HZ) &&
1431 lookupCacheEnabled) {
1432 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1433 (direntry->d_inode->i_nlink == 1)) {
1438 cFYI(1, ("Have to revalidate file due to hardlinks"));
1442 /* save mtime and size */
1443 local_mtime = direntry->d_inode->i_mtime;
1444 local_size = direntry->d_inode->i_size;
1446 if (cifs_sb->tcon->unix_ext) {
1447 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1448 direntry->d_sb, xid);
1450 cFYI(1, ("error on getting revalidate info %d", rc));
1451 /* if (rc != -ENOENT)
1452 rc = 0; */ /* BB should we cache info on
1456 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1457 direntry->d_sb, xid, NULL);
1459 cFYI(1, ("error on getting revalidate info %d", rc));
1460 /* if (rc != -ENOENT)
1461 rc = 0; */ /* BB should we cache info on
1465 /* should we remap certain errors, access denied?, to zero */
1467 /* if not oplocked, we invalidate inode pages if mtime or file size
1468 had changed on server */
1470 if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) &&
1471 (local_size == direntry->d_inode->i_size)) {
1472 cFYI(1, ("cifs_revalidate - inode unchanged"));
1474 /* file may have changed on server */
1475 if (cifsInode->clientCanCacheRead) {
1476 /* no need to invalidate inode pages since we were the
1477 only ones who could have modified the file and the
1478 server copy is staler than ours */
1480 invalidate_inode = true;
1484 /* can not grab this sem since kernel filesys locking documentation
1485 indicates i_mutex may be taken by the kernel on lookup and rename
1486 which could deadlock if we grab the i_mutex here as well */
1487 /* mutex_lock(&direntry->d_inode->i_mutex);*/
1488 /* need to write out dirty pages here */
1489 if (direntry->d_inode->i_mapping) {
1490 /* do we need to lock inode until after invalidate completes
1492 wbrc = filemap_fdatawrite(direntry->d_inode->i_mapping);
1494 CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1496 if (invalidate_inode) {
1497 /* shrink_dcache not necessary now that cifs dentry ops
1498 are exported for negative dentries */
1499 /* if (S_ISDIR(direntry->d_inode->i_mode))
1500 shrink_dcache_parent(direntry); */
1501 if (S_ISREG(direntry->d_inode->i_mode)) {
1502 if (direntry->d_inode->i_mapping) {
1503 wbrc = filemap_fdatawait(direntry->d_inode->i_mapping);
1505 CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1507 /* may eventually have to do this for open files too */
1508 if (list_empty(&(cifsInode->openFileList))) {
1509 /* changed on server - flush read ahead pages */
1510 cFYI(1, ("Invalidating read ahead data on "
1512 invalidate_remote_inode(direntry->d_inode);
1516 /* mutex_unlock(&direntry->d_inode->i_mutex); */
1523 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1526 int err = cifs_revalidate(dentry);
1528 generic_fillattr(dentry->d_inode, stat);
1529 stat->blksize = CIFS_MAX_MSGSIZE;
1534 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1536 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1537 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1541 page = grab_cache_page(mapping, index);
1545 zero_user_segment(page, offset, PAGE_CACHE_SIZE);
1547 page_cache_release(page);
1551 static int cifs_vmtruncate(struct inode *inode, loff_t offset)
1553 struct address_space *mapping = inode->i_mapping;
1554 unsigned long limit;
1556 spin_lock(&inode->i_lock);
1557 if (inode->i_size < offset)
1560 * truncation of in-use swapfiles is disallowed - it would cause
1561 * subsequent swapout to scribble on the now-freed blocks.
1563 if (IS_SWAPFILE(inode)) {
1564 spin_unlock(&inode->i_lock);
1567 i_size_write(inode, offset);
1568 spin_unlock(&inode->i_lock);
1570 * unmap_mapping_range is called twice, first simply for efficiency
1571 * so that truncate_inode_pages does fewer single-page unmaps. However
1572 * after this first call, and before truncate_inode_pages finishes,
1573 * it is possible for private pages to be COWed, which remain after
1574 * truncate_inode_pages finishes, hence the second unmap_mapping_range
1575 * call must be made for correctness.
1577 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1578 truncate_inode_pages(mapping, offset);
1579 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1583 limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
1584 if (limit != RLIM_INFINITY && offset > limit) {
1585 spin_unlock(&inode->i_lock);
1588 if (offset > inode->i_sb->s_maxbytes) {
1589 spin_unlock(&inode->i_lock);
1592 i_size_write(inode, offset);
1593 spin_unlock(&inode->i_lock);
1595 if (inode->i_op && inode->i_op->truncate)
1596 inode->i_op->truncate(inode);
1599 send_sig(SIGXFSZ, current, 0);
1607 cifs_set_file_size(struct inode *inode, struct iattr *attrs,
1608 int xid, char *full_path)
1611 struct cifsFileInfo *open_file;
1612 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1613 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1614 struct cifsTconInfo *pTcon = cifs_sb->tcon;
1617 * To avoid spurious oplock breaks from server, in the case of
1618 * inodes that we already have open, avoid doing path based
1619 * setting of file size if we can do it by handle.
1620 * This keeps our caching token (oplock) and avoids timeouts
1621 * when the local oplock break takes longer to flush
1622 * writebehind data than the SMB timeout for the SetPathInfo
1623 * request would allow
1625 open_file = find_writable_file(cifsInode);
1627 __u16 nfid = open_file->netfid;
1628 __u32 npid = open_file->pid;
1629 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size, nfid,
1631 atomic_dec(&open_file->wrtPending);
1632 cFYI(1, ("SetFSize for attrs rc = %d", rc));
1633 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1634 unsigned int bytes_written;
1635 rc = CIFSSMBWrite(xid, pTcon, nfid, 0, attrs->ia_size,
1636 &bytes_written, NULL, NULL, 1);
1637 cFYI(1, ("Wrt seteof rc %d", rc));
1643 /* Set file size by pathname rather than by handle
1644 either because no valid, writeable file handle for
1645 it was found or because there was an error setting
1647 rc = CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size,
1648 false, cifs_sb->local_nls,
1649 cifs_sb->mnt_cifs_flags &
1650 CIFS_MOUNT_MAP_SPECIAL_CHR);
1651 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1652 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1656 rc = SMBLegacyOpen(xid, pTcon, full_path,
1657 FILE_OPEN, GENERIC_WRITE,
1658 CREATE_NOT_DIR, &netfid, &oplock, NULL,
1660 cifs_sb->mnt_cifs_flags &
1661 CIFS_MOUNT_MAP_SPECIAL_CHR);
1663 unsigned int bytes_written;
1664 rc = CIFSSMBWrite(xid, pTcon, netfid, 0,
1666 &bytes_written, NULL,
1668 cFYI(1, ("wrt seteof rc %d", rc));
1669 CIFSSMBClose(xid, pTcon, netfid);
1675 rc = cifs_vmtruncate(inode, attrs->ia_size);
1676 cifs_truncate_page(inode->i_mapping, inode->i_size);
1683 cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
1687 char *full_path = NULL;
1688 struct inode *inode = direntry->d_inode;
1689 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1690 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1691 struct cifsTconInfo *pTcon = cifs_sb->tcon;
1692 struct cifs_unix_set_info_args *args = NULL;
1694 cFYI(1, ("setattr_unix on file %s attrs->ia_valid=0x%x",
1695 direntry->d_name.name, attrs->ia_valid));
1699 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1700 /* check if we have permission to change attrs */
1701 rc = inode_change_ok(inode, attrs);
1708 full_path = build_path_from_dentry(direntry);
1709 if (full_path == NULL) {
1714 if ((attrs->ia_valid & ATTR_MTIME) || (attrs->ia_valid & ATTR_SIZE)) {
1716 Flush data before changing file size or changing the last
1717 write time of the file on the server. If the
1718 flush returns error, store it to report later and continue.
1719 BB: This should be smarter. Why bother flushing pages that
1720 will be truncated anyway? Also, should we error out here if
1721 the flush returns error?
1723 rc = filemap_write_and_wait(inode->i_mapping);
1725 cifsInode->write_behind_rc = rc;
1730 if (attrs->ia_valid & ATTR_SIZE) {
1731 rc = cifs_set_file_size(inode, attrs, xid, full_path);
1736 /* skip mode change if it's just for clearing setuid/setgid */
1737 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1738 attrs->ia_valid &= ~ATTR_MODE;
1740 args = kmalloc(sizeof(*args), GFP_KERNEL);
1746 /* set up the struct */
1747 if (attrs->ia_valid & ATTR_MODE)
1748 args->mode = attrs->ia_mode;
1750 args->mode = NO_CHANGE_64;
1752 if (attrs->ia_valid & ATTR_UID)
1753 args->uid = attrs->ia_uid;
1755 args->uid = NO_CHANGE_64;
1757 if (attrs->ia_valid & ATTR_GID)
1758 args->gid = attrs->ia_gid;
1760 args->gid = NO_CHANGE_64;
1762 if (attrs->ia_valid & ATTR_ATIME)
1763 args->atime = cifs_UnixTimeToNT(attrs->ia_atime);
1765 args->atime = NO_CHANGE_64;
1767 if (attrs->ia_valid & ATTR_MTIME)
1768 args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime);
1770 args->mtime = NO_CHANGE_64;
1772 if (attrs->ia_valid & ATTR_CTIME)
1773 args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime);
1775 args->ctime = NO_CHANGE_64;
1778 rc = CIFSSMBUnixSetInfo(xid, pTcon, full_path, args,
1780 cifs_sb->mnt_cifs_flags &
1781 CIFS_MOUNT_MAP_SPECIAL_CHR);
1784 rc = inode_setattr(inode, attrs);
1793 cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
1796 struct inode *inode = direntry->d_inode;
1797 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1798 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1799 char *full_path = NULL;
1802 __u64 mode = NO_CHANGE_64;
1806 cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1807 direntry->d_name.name, attrs->ia_valid));
1809 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1810 /* check if we have permission to change attrs */
1811 rc = inode_change_ok(inode, attrs);
1819 full_path = build_path_from_dentry(direntry);
1820 if (full_path == NULL) {
1825 if ((attrs->ia_valid & ATTR_MTIME) || (attrs->ia_valid & ATTR_SIZE)) {
1827 Flush data before changing file size or changing the last
1828 write time of the file on the server. If the
1829 flush returns error, store it to report later and continue.
1830 BB: This should be smarter. Why bother flushing pages that
1831 will be truncated anyway? Also, should we error out here if
1832 the flush returns error?
1834 rc = filemap_write_and_wait(inode->i_mapping);
1836 cifsInode->write_behind_rc = rc;
1841 if (attrs->ia_valid & ATTR_SIZE) {
1842 rc = cifs_set_file_size(inode, attrs, xid, full_path);
1844 goto cifs_setattr_exit;
1848 * Without unix extensions we can't send ownership changes to the
1849 * server, so silently ignore them. This is consistent with how
1850 * local DOS/Windows filesystems behave (VFAT, NTFS, etc). With
1851 * CIFSACL support + proper Windows to Unix idmapping, we may be
1852 * able to support this in the future.
1854 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID))
1855 attrs->ia_valid &= ~(ATTR_UID | ATTR_GID);
1857 /* skip mode change if it's just for clearing setuid/setgid */
1858 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1859 attrs->ia_valid &= ~ATTR_MODE;
1861 if (attrs->ia_valid & ATTR_MODE) {
1862 cFYI(1, ("Mode changed to 0%o", attrs->ia_mode));
1863 mode = attrs->ia_mode;
1866 if (attrs->ia_valid & ATTR_MODE) {
1868 #ifdef CONFIG_CIFS_EXPERIMENTAL
1869 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
1870 rc = mode_to_acl(inode, full_path, mode);
1873 if (((mode & S_IWUGO) == 0) &&
1874 (cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
1876 dosattr = cifsInode->cifsAttrs | ATTR_READONLY;
1878 /* fix up mode if we're not using dynperm */
1879 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
1880 attrs->ia_mode = inode->i_mode & ~S_IWUGO;
1881 } else if ((mode & S_IWUGO) &&
1882 (cifsInode->cifsAttrs & ATTR_READONLY)) {
1884 dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
1885 /* Attributes of 0 are ignored */
1887 dosattr |= ATTR_NORMAL;
1889 /* reset local inode permissions to normal */
1890 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
1891 attrs->ia_mode &= ~(S_IALLUGO);
1892 if (S_ISDIR(inode->i_mode))
1894 cifs_sb->mnt_dir_mode;
1897 cifs_sb->mnt_file_mode;
1899 } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
1900 /* ignore mode change - ATTR_READONLY hasn't changed */
1901 attrs->ia_valid &= ~ATTR_MODE;
1905 if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) ||
1906 ((attrs->ia_valid & ATTR_MODE) && dosattr)) {
1907 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
1908 /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */
1910 /* Even if error on time set, no sense failing the call if
1911 the server would set the time to a reasonable value anyway,
1912 and this check ensures that we are not being called from
1913 sys_utimes in which case we ought to fail the call back to
1914 the user when the server rejects the call */
1915 if ((rc) && (attrs->ia_valid &
1916 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1920 /* do not need local check to inode_check_ok since the server does
1923 rc = inode_setattr(inode, attrs);
1931 cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1933 struct inode *inode = direntry->d_inode;
1934 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1935 struct cifsTconInfo *pTcon = cifs_sb->tcon;
1937 if (pTcon->unix_ext)
1938 return cifs_setattr_unix(direntry, attrs);
1940 return cifs_setattr_nounix(direntry, attrs);
1942 /* BB: add cifs_setattr_legacy for really old servers */
1946 void cifs_delete_inode(struct inode *inode)
1948 cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1949 /* may have to add back in if and when safe distributed caching of
1950 directories added e.g. via FindNotify */