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);
223 if (rc == -EREMOTE && !is_dfs_referral) {
224 is_dfs_referral = true;
225 cFYI(DBG2, ("DFS ref"));
226 /* for DFS, server does not give us real inode data */
227 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 cFYI(1, ("Old time %ld", cifsInfo->time));
510 cifsInfo->time = jiffies;
511 cFYI(1, ("New time %ld", cifsInfo->time));
513 /* blksize needs to be multiple of two. So safer to default to
514 blksize and blkbits set in superblock so 2**blkbits and blksize
515 will match rather than setting to:
516 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
518 /* Linux can not store file creation time so ignore it */
519 if (pfindData->LastAccessTime)
520 inode->i_atime = cifs_NTtimeToUnix
521 (le64_to_cpu(pfindData->LastAccessTime));
522 else /* do not need to use current_fs_time - time not stored */
523 inode->i_atime = CURRENT_TIME;
525 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
527 cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
528 cFYI(DBG2, ("Attributes came in as 0x%x", attr));
529 if (adjustTZ && (pTcon->ses) && (pTcon->ses->server)) {
530 inode->i_ctime.tv_sec += pTcon->ses->server->timeAdj;
531 inode->i_mtime.tv_sec += pTcon->ses->server->timeAdj;
534 /* get default inode mode */
535 if (attr & ATTR_DIRECTORY)
536 default_mode = cifs_sb->mnt_dir_mode;
538 default_mode = cifs_sb->mnt_file_mode;
540 /* set permission bits */
541 if (atomic_read(&cifsInfo->inUse) == 0 ||
542 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
543 inode->i_mode = default_mode;
545 /* just reenable write bits if !ATTR_READONLY */
546 if ((inode->i_mode & S_IWUGO) == 0 &&
547 (attr & ATTR_READONLY) == 0)
548 inode->i_mode |= (S_IWUGO & default_mode);
549 inode->i_mode &= ~S_IFMT;
551 /* clear write bits if ATTR_READONLY is set */
552 if (attr & ATTR_READONLY)
553 inode->i_mode &= ~S_IWUGO;
556 if ((attr & ATTR_SYSTEM) &&
557 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) {
558 /* no need to fix endianness on 0 */
559 if (pfindData->EndOfFile == 0)
560 inode->i_mode |= S_IFIFO;
561 else if (decode_sfu_inode(inode,
562 le64_to_cpu(pfindData->EndOfFile),
563 full_path, cifs_sb, xid))
564 cFYI(1, ("unknown SFU file type\n"));
566 if (attr & ATTR_DIRECTORY)
567 inode->i_mode |= S_IFDIR;
569 inode->i_mode |= S_IFREG;
572 spin_lock(&inode->i_lock);
573 if (is_size_safe_to_change(cifsInfo,
574 le64_to_cpu(pfindData->EndOfFile))) {
575 /* can not safely shrink the file size here if the
576 client is writing to it due to potential races */
577 i_size_write(inode, le64_to_cpu(pfindData->EndOfFile));
579 /* 512 bytes (2**9) is the fake blocksize that must be
580 used for this calculation */
581 inode->i_blocks = (512 - 1 + le64_to_cpu(
582 pfindData->AllocationSize)) >> 9;
584 spin_unlock(&inode->i_lock);
586 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
588 /* BB fill in uid and gid here? with help from winbind?
589 or retrieve from NTFS stream extended attribute */
590 #ifdef CONFIG_CIFS_EXPERIMENTAL
591 /* fill in 0777 bits from ACL */
592 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
593 cFYI(1, ("Getting mode bits from ACL"));
594 acl_to_uid_mode(inode, full_path, pfid);
597 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
598 /* fill in remaining high mode bits e.g. SUID, VTX */
599 get_sfu_mode(inode, full_path, cifs_sb, xid);
600 } else if (atomic_read(&cifsInfo->inUse) == 0) {
601 inode->i_uid = cifs_sb->mnt_uid;
602 inode->i_gid = cifs_sb->mnt_gid;
603 /* set so we do not keep refreshing these fields with
604 bad data after user has changed them in memory */
605 atomic_set(&cifsInfo->inUse, 1);
608 cifs_set_ops(inode, is_dfs_referral);
618 static const struct inode_operations cifs_ipc_inode_ops = {
619 .lookup = cifs_lookup,
622 /* gets root inode */
623 struct inode *cifs_iget(struct super_block *sb, unsigned long ino)
626 struct cifs_sb_info *cifs_sb;
630 inode = iget_locked(sb, ino);
632 return ERR_PTR(-ENOMEM);
633 if (!(inode->i_state & I_NEW))
636 cifs_sb = CIFS_SB(inode->i_sb);
639 if (cifs_sb->tcon->unix_ext)
640 rc = cifs_get_inode_info_unix(&inode, "", inode->i_sb, xid);
642 rc = cifs_get_inode_info(&inode, "", NULL, inode->i_sb, xid,
644 if (rc && cifs_sb->tcon->ipc) {
645 cFYI(1, ("ipc connection - fake read inode"));
646 inode->i_mode |= S_IFDIR;
648 inode->i_op = &cifs_ipc_inode_ops;
649 inode->i_fop = &simple_dir_operations;
650 inode->i_uid = cifs_sb->mnt_uid;
651 inode->i_gid = cifs_sb->mnt_gid;
657 unlock_new_inode(inode);
659 /* can not call macro FreeXid here since in a void func
660 * TODO: This is no longer true
666 int cifs_unlink(struct inode *inode, struct dentry *direntry)
670 struct cifs_sb_info *cifs_sb;
671 struct cifsTconInfo *pTcon;
672 char *full_path = NULL;
673 struct cifsInodeInfo *cifsInode;
674 FILE_BASIC_INFO *pinfo_buf;
676 cFYI(1, ("cifs_unlink, inode = 0x%p", inode));
681 cifs_sb = CIFS_SB(inode->i_sb);
683 cifs_sb = CIFS_SB(direntry->d_sb);
684 pTcon = cifs_sb->tcon;
686 /* Unlink can be called from rename so we can not grab the sem here
687 since we deadlock otherwise */
688 /* mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/
689 full_path = build_path_from_dentry(direntry);
690 /* mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/
691 if (full_path == NULL) {
696 if ((pTcon->ses->capabilities & CAP_UNIX) &&
697 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
698 le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
699 rc = CIFSPOSIXDelFile(xid, pTcon, full_path,
700 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
701 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
702 cFYI(1, ("posix del rc %d", rc));
703 if ((rc == 0) || (rc == -ENOENT))
704 goto psx_del_no_retry;
707 rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
708 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
711 if (direntry->d_inode)
712 drop_nlink(direntry->d_inode);
713 } else if (rc == -ENOENT) {
715 } else if (rc == -ETXTBSY) {
719 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
720 CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
721 &netfid, &oplock, NULL, cifs_sb->local_nls,
722 cifs_sb->mnt_cifs_flags &
723 CIFS_MOUNT_MAP_SPECIAL_CHR);
725 CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
727 cifs_sb->mnt_cifs_flags &
728 CIFS_MOUNT_MAP_SPECIAL_CHR);
729 CIFSSMBClose(xid, pTcon, netfid);
730 if (direntry->d_inode)
731 drop_nlink(direntry->d_inode);
733 } else if (rc == -EACCES) {
734 /* try only if r/o attribute set in local lookup data? */
735 pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
737 /* ATTRS set to normal clears r/o bit */
738 pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
739 if (!(pTcon->ses->flags & CIFS_SES_NT4))
740 rc = CIFSSMBSetTimes(xid, pTcon, full_path,
743 cifs_sb->mnt_cifs_flags &
744 CIFS_MOUNT_MAP_SPECIAL_CHR);
748 if (rc == -EOPNOTSUPP) {
751 /* rc = CIFSSMBSetAttrLegacy(xid, pTcon,
755 For some strange reason it seems that NT4 eats the
756 old setattr call without actually setting the
757 attributes so on to the third attempted workaround
760 /* BB could scan to see if we already have it open
761 and pass in pid of opener to function */
762 rc = CIFSSMBOpen(xid, pTcon, full_path,
763 FILE_OPEN, SYNCHRONIZE |
764 FILE_WRITE_ATTRIBUTES, 0,
765 &netfid, &oplock, NULL,
767 cifs_sb->mnt_cifs_flags &
768 CIFS_MOUNT_MAP_SPECIAL_CHR);
770 rc = CIFSSMBSetFileTimes(xid, pTcon,
773 CIFSSMBClose(xid, pTcon, netfid);
779 rc = CIFSSMBDelFile(xid, pTcon, full_path,
781 cifs_sb->mnt_cifs_flags &
782 CIFS_MOUNT_MAP_SPECIAL_CHR);
784 if (direntry->d_inode)
785 drop_nlink(direntry->d_inode);
786 } else if (rc == -ETXTBSY) {
790 rc = CIFSSMBOpen(xid, pTcon, full_path,
793 CREATE_DELETE_ON_CLOSE,
794 &netfid, &oplock, NULL,
796 cifs_sb->mnt_cifs_flags &
797 CIFS_MOUNT_MAP_SPECIAL_CHR);
799 CIFSSMBRenameOpenFile(xid, pTcon,
802 cifs_sb->mnt_cifs_flags &
803 CIFS_MOUNT_MAP_SPECIAL_CHR);
804 CIFSSMBClose(xid, pTcon, netfid);
805 if (direntry->d_inode)
806 drop_nlink(direntry->d_inode);
808 /* BB if rc = -ETXTBUSY goto the rename logic BB */
812 if (direntry->d_inode) {
813 cifsInode = CIFS_I(direntry->d_inode);
814 cifsInode->time = 0; /* will force revalidate to get info
816 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
819 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
820 cifsInode = CIFS_I(inode);
821 cifsInode->time = 0; /* force revalidate of dir as well */
829 static void posix_fill_in_inode(struct inode *tmp_inode,
830 FILE_UNIX_BASIC_INFO *pData, int isNewInode)
832 struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
834 struct timespec local_mtime;
836 cifsInfo->time = jiffies;
837 atomic_inc(&cifsInfo->inUse);
839 /* save mtime and size */
840 local_mtime = tmp_inode->i_mtime;
841 local_size = tmp_inode->i_size;
843 cifs_unix_info_to_inode(tmp_inode, pData, 1);
844 cifs_set_ops(tmp_inode, false);
846 if (!S_ISREG(tmp_inode->i_mode))
850 * No sense invalidating pages for new inode
851 * since we we have not started caching
852 * readahead file data yet.
857 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
858 (local_size == tmp_inode->i_size)) {
859 cFYI(1, ("inode exists but unchanged"));
861 /* file may have changed on server */
862 cFYI(1, ("invalidate inode, readdir detected change"));
863 invalidate_remote_inode(tmp_inode);
867 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
871 struct cifs_sb_info *cifs_sb;
872 struct cifsTconInfo *pTcon;
873 char *full_path = NULL;
874 struct inode *newinode = NULL;
876 cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
880 cifs_sb = CIFS_SB(inode->i_sb);
881 pTcon = cifs_sb->tcon;
883 full_path = build_path_from_dentry(direntry);
884 if (full_path == NULL) {
889 if ((pTcon->ses->capabilities & CAP_UNIX) &&
890 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
891 le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
893 FILE_UNIX_BASIC_INFO *pInfo =
894 kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
900 mode &= ~current->fs->umask;
901 rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT,
902 mode, NULL /* netfid */, pInfo, &oplock,
903 full_path, cifs_sb->local_nls,
904 cifs_sb->mnt_cifs_flags &
905 CIFS_MOUNT_MAP_SPECIAL_CHR);
906 if (rc == -EOPNOTSUPP) {
908 goto mkdir_retry_old;
910 cFYI(1, ("posix mkdir returned 0x%x", rc));
913 if (pInfo->Type == cpu_to_le32(-1)) {
914 /* no return info, go query for it */
918 /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
922 direntry->d_op = &cifs_ci_dentry_ops;
924 direntry->d_op = &cifs_dentry_ops;
926 newinode = new_inode(inode->i_sb);
927 if (newinode == NULL) {
931 /* Is an i_ino of zero legal? */
932 /* Are there sanity checks we can use to ensure that
933 the server is really filling in that field? */
934 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
936 (unsigned long)pInfo->UniqueId;
937 } /* note ino incremented to unique num in new_inode */
938 if (inode->i_sb->s_flags & MS_NOATIME)
939 newinode->i_flags |= S_NOATIME | S_NOCMTIME;
940 newinode->i_nlink = 2;
942 insert_inode_hash(newinode);
943 d_instantiate(direntry, newinode);
945 /* we already checked in POSIXCreate whether
946 frame was long enough */
947 posix_fill_in_inode(direntry->d_inode,
948 pInfo, 1 /* NewInode */);
949 #ifdef CONFIG_CIFS_DEBUG2
950 cFYI(1, ("instantiated dentry %p %s to inode %p",
951 direntry, direntry->d_name.name, newinode));
953 if (newinode->i_nlink != 2)
954 cFYI(1, ("unexpected number of links %d",
962 /* BB add setting the equivalent of mode via CreateX w/ACLs */
963 rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
964 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
966 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
972 rc = cifs_get_inode_info_unix(&newinode, full_path,
975 rc = cifs_get_inode_info(&newinode, full_path, NULL,
976 inode->i_sb, xid, NULL);
979 direntry->d_op = &cifs_ci_dentry_ops;
981 direntry->d_op = &cifs_dentry_ops;
982 d_instantiate(direntry, newinode);
983 /* setting nlink not necessary except in cases where we
984 * failed to get it from the server or was set bogus */
985 if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
986 direntry->d_inode->i_nlink = 2;
987 mode &= ~current->fs->umask;
988 if (pTcon->unix_ext) {
989 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
990 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
992 (__u64)current->fsuid,
993 (__u64)current->fsgid,
996 cifs_sb->mnt_cifs_flags &
997 CIFS_MOUNT_MAP_SPECIAL_CHR);
999 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1001 (__u64)-1, 0 /* dev_t */,
1003 cifs_sb->mnt_cifs_flags &
1004 CIFS_MOUNT_MAP_SPECIAL_CHR);
1007 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
1008 (mode & S_IWUGO) == 0) {
1009 FILE_BASIC_INFO pInfo;
1010 memset(&pInfo, 0, sizeof(pInfo));
1011 pInfo.Attributes = cpu_to_le32(ATTR_READONLY);
1012 CIFSSMBSetTimes(xid, pTcon, full_path,
1013 &pInfo, cifs_sb->local_nls,
1014 cifs_sb->mnt_cifs_flags &
1015 CIFS_MOUNT_MAP_SPECIAL_CHR);
1017 if (direntry->d_inode) {
1018 direntry->d_inode->i_mode = mode;
1019 direntry->d_inode->i_mode |= S_IFDIR;
1020 if (cifs_sb->mnt_cifs_flags &
1021 CIFS_MOUNT_SET_UID) {
1022 direntry->d_inode->i_uid =
1024 direntry->d_inode->i_gid =
1036 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1040 struct cifs_sb_info *cifs_sb;
1041 struct cifsTconInfo *pTcon;
1042 char *full_path = NULL;
1043 struct cifsInodeInfo *cifsInode;
1045 cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
1049 cifs_sb = CIFS_SB(inode->i_sb);
1050 pTcon = cifs_sb->tcon;
1052 full_path = build_path_from_dentry(direntry);
1053 if (full_path == NULL) {
1058 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1059 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1063 spin_lock(&direntry->d_inode->i_lock);
1064 i_size_write(direntry->d_inode, 0);
1065 clear_nlink(direntry->d_inode);
1066 spin_unlock(&direntry->d_inode->i_lock);
1069 cifsInode = CIFS_I(direntry->d_inode);
1070 cifsInode->time = 0; /* force revalidate to go get info when
1072 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1073 current_fs_time(inode->i_sb);
1080 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
1081 struct inode *target_inode, struct dentry *target_direntry)
1085 struct cifs_sb_info *cifs_sb_source;
1086 struct cifs_sb_info *cifs_sb_target;
1087 struct cifsTconInfo *pTcon;
1093 cifs_sb_target = CIFS_SB(target_inode->i_sb);
1094 cifs_sb_source = CIFS_SB(source_inode->i_sb);
1095 pTcon = cifs_sb_source->tcon;
1097 if (pTcon != cifs_sb_target->tcon) {
1099 return -EXDEV; /* BB actually could be allowed if same server,
1100 but different share.
1101 Might eventually add support for this */
1104 /* we already have the rename sem so we do not need to grab it again
1105 here to protect the path integrity */
1106 fromName = build_path_from_dentry(source_direntry);
1107 toName = build_path_from_dentry(target_direntry);
1108 if ((fromName == NULL) || (toName == NULL)) {
1110 goto cifs_rename_exit;
1113 rc = CIFSSMBRename(xid, pTcon, fromName, toName,
1114 cifs_sb_source->local_nls,
1115 cifs_sb_source->mnt_cifs_flags &
1116 CIFS_MOUNT_MAP_SPECIAL_CHR);
1117 if (rc == -EEXIST) {
1118 /* check if they are the same file because rename of hardlinked
1120 FILE_UNIX_BASIC_INFO *info_buf_source;
1121 FILE_UNIX_BASIC_INFO *info_buf_target;
1124 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1125 if (info_buf_source != NULL) {
1126 info_buf_target = info_buf_source + 1;
1127 if (pTcon->unix_ext)
1128 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
1130 cifs_sb_source->local_nls,
1131 cifs_sb_source->mnt_cifs_flags &
1132 CIFS_MOUNT_MAP_SPECIAL_CHR);
1133 /* else rc is still EEXIST so will fall through to
1134 unlink the target and retry rename */
1136 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
1138 cifs_sb_target->local_nls,
1139 /* remap based on source sb */
1140 cifs_sb_source->mnt_cifs_flags &
1141 CIFS_MOUNT_MAP_SPECIAL_CHR);
1144 (info_buf_source->UniqueId ==
1145 info_buf_target->UniqueId)) {
1146 /* do not rename since the files are hardlinked which
1149 /* we either can not tell the files are hardlinked
1150 (as with Windows servers) or files are not
1151 hardlinked so delete the target manually before
1152 renaming to follow POSIX rather than Windows
1154 cifs_unlink(target_inode, target_direntry);
1155 rc = CIFSSMBRename(xid, pTcon, fromName,
1157 cifs_sb_source->local_nls,
1158 cifs_sb_source->mnt_cifs_flags
1159 & CIFS_MOUNT_MAP_SPECIAL_CHR);
1161 kfree(info_buf_source);
1162 } /* if we can not get memory just leave rc as EEXIST */
1166 cFYI(1, ("rename rc %d", rc));
1168 if ((rc == -EIO) || (rc == -EEXIST)) {
1172 /* BB FIXME Is Generic Read correct for rename? */
1173 /* if renaming directory - we should not say CREATE_NOT_DIR,
1174 need to test renaming open directory, also GENERIC_READ
1175 might not right be right access to request */
1176 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
1177 CREATE_NOT_DIR, &netfid, &oplock, NULL,
1178 cifs_sb_source->local_nls,
1179 cifs_sb_source->mnt_cifs_flags &
1180 CIFS_MOUNT_MAP_SPECIAL_CHR);
1182 rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
1183 cifs_sb_source->local_nls,
1184 cifs_sb_source->mnt_cifs_flags &
1185 CIFS_MOUNT_MAP_SPECIAL_CHR);
1186 CIFSSMBClose(xid, pTcon, netfid);
1197 int cifs_revalidate(struct dentry *direntry)
1200 int rc = 0, wbrc = 0;
1202 struct cifs_sb_info *cifs_sb;
1203 struct cifsInodeInfo *cifsInode;
1205 struct timespec local_mtime;
1206 bool invalidate_inode = false;
1208 if (direntry->d_inode == NULL)
1211 cifsInode = CIFS_I(direntry->d_inode);
1213 if (cifsInode == NULL)
1216 /* no sense revalidating inode info on file that no one can write */
1217 if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
1222 cifs_sb = CIFS_SB(direntry->d_sb);
1224 /* can not safely grab the rename sem here if rename calls revalidate
1225 since that would deadlock */
1226 full_path = build_path_from_dentry(direntry);
1227 if (full_path == NULL) {
1231 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1232 "jiffies %ld", full_path, direntry->d_inode,
1233 direntry->d_inode->i_count.counter, direntry,
1234 direntry->d_time, jiffies));
1236 if (cifsInode->time == 0) {
1237 /* was set to zero previously to force revalidate */
1238 } else if (time_before(jiffies, cifsInode->time + HZ) &&
1239 lookupCacheEnabled) {
1240 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1241 (direntry->d_inode->i_nlink == 1)) {
1246 cFYI(1, ("Have to revalidate file due to hardlinks"));
1250 /* save mtime and size */
1251 local_mtime = direntry->d_inode->i_mtime;
1252 local_size = direntry->d_inode->i_size;
1254 if (cifs_sb->tcon->unix_ext) {
1255 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1256 direntry->d_sb, xid);
1258 cFYI(1, ("error on getting revalidate info %d", rc));
1259 /* if (rc != -ENOENT)
1260 rc = 0; */ /* BB should we cache info on
1264 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1265 direntry->d_sb, xid, NULL);
1267 cFYI(1, ("error on getting revalidate info %d", rc));
1268 /* if (rc != -ENOENT)
1269 rc = 0; */ /* BB should we cache info on
1273 /* should we remap certain errors, access denied?, to zero */
1275 /* if not oplocked, we invalidate inode pages if mtime or file size
1276 had changed on server */
1278 if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) &&
1279 (local_size == direntry->d_inode->i_size)) {
1280 cFYI(1, ("cifs_revalidate - inode unchanged"));
1282 /* file may have changed on server */
1283 if (cifsInode->clientCanCacheRead) {
1284 /* no need to invalidate inode pages since we were the
1285 only ones who could have modified the file and the
1286 server copy is staler than ours */
1288 invalidate_inode = true;
1292 /* can not grab this sem since kernel filesys locking documentation
1293 indicates i_mutex may be taken by the kernel on lookup and rename
1294 which could deadlock if we grab the i_mutex here as well */
1295 /* mutex_lock(&direntry->d_inode->i_mutex);*/
1296 /* need to write out dirty pages here */
1297 if (direntry->d_inode->i_mapping) {
1298 /* do we need to lock inode until after invalidate completes
1300 wbrc = filemap_fdatawrite(direntry->d_inode->i_mapping);
1302 CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1304 if (invalidate_inode) {
1305 /* shrink_dcache not necessary now that cifs dentry ops
1306 are exported for negative dentries */
1307 /* if (S_ISDIR(direntry->d_inode->i_mode))
1308 shrink_dcache_parent(direntry); */
1309 if (S_ISREG(direntry->d_inode->i_mode)) {
1310 if (direntry->d_inode->i_mapping)
1311 wbrc = filemap_fdatawait(direntry->d_inode->i_mapping);
1313 CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1314 /* may eventually have to do this for open files too */
1315 if (list_empty(&(cifsInode->openFileList))) {
1316 /* changed on server - flush read ahead pages */
1317 cFYI(1, ("Invalidating read ahead data on "
1319 invalidate_remote_inode(direntry->d_inode);
1323 /* mutex_unlock(&direntry->d_inode->i_mutex); */
1330 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1333 int err = cifs_revalidate(dentry);
1335 generic_fillattr(dentry->d_inode, stat);
1336 stat->blksize = CIFS_MAX_MSGSIZE;
1341 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1343 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1344 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1348 page = grab_cache_page(mapping, index);
1352 zero_user_segment(page, offset, PAGE_CACHE_SIZE);
1354 page_cache_release(page);
1358 static int cifs_vmtruncate(struct inode *inode, loff_t offset)
1360 struct address_space *mapping = inode->i_mapping;
1361 unsigned long limit;
1363 spin_lock(&inode->i_lock);
1364 if (inode->i_size < offset)
1367 * truncation of in-use swapfiles is disallowed - it would cause
1368 * subsequent swapout to scribble on the now-freed blocks.
1370 if (IS_SWAPFILE(inode)) {
1371 spin_unlock(&inode->i_lock);
1374 i_size_write(inode, offset);
1375 spin_unlock(&inode->i_lock);
1377 * unmap_mapping_range is called twice, first simply for efficiency
1378 * so that truncate_inode_pages does fewer single-page unmaps. However
1379 * after this first call, and before truncate_inode_pages finishes,
1380 * it is possible for private pages to be COWed, which remain after
1381 * truncate_inode_pages finishes, hence the second unmap_mapping_range
1382 * call must be made for correctness.
1384 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1385 truncate_inode_pages(mapping, offset);
1386 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1390 limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
1391 if (limit != RLIM_INFINITY && offset > limit) {
1392 spin_unlock(&inode->i_lock);
1395 if (offset > inode->i_sb->s_maxbytes) {
1396 spin_unlock(&inode->i_lock);
1399 i_size_write(inode, offset);
1400 spin_unlock(&inode->i_lock);
1402 if (inode->i_op && inode->i_op->truncate)
1403 inode->i_op->truncate(inode);
1406 send_sig(SIGXFSZ, current, 0);
1413 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1416 struct cifs_sb_info *cifs_sb;
1417 struct cifsTconInfo *pTcon;
1418 char *full_path = NULL;
1420 struct cifsFileInfo *open_file = NULL;
1421 FILE_BASIC_INFO time_buf;
1422 bool set_time = false;
1423 bool set_dosattr = false;
1424 __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1425 __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1426 __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1427 struct cifsInodeInfo *cifsInode;
1428 struct inode *inode = direntry->d_inode;
1432 cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1433 direntry->d_name.name, attrs->ia_valid));
1435 cifs_sb = CIFS_SB(inode->i_sb);
1436 pTcon = cifs_sb->tcon;
1438 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1439 /* check if we have permission to change attrs */
1440 rc = inode_change_ok(inode, attrs);
1448 full_path = build_path_from_dentry(direntry);
1449 if (full_path == NULL) {
1453 cifsInode = CIFS_I(inode);
1455 if ((attrs->ia_valid & ATTR_MTIME) || (attrs->ia_valid & ATTR_SIZE)) {
1457 Flush data before changing file size or changing the last
1458 write time of the file on the server. If the
1459 flush returns error, store it to report later and continue.
1460 BB: This should be smarter. Why bother flushing pages that
1461 will be truncated anyway? Also, should we error out here if
1462 the flush returns error?
1464 rc = filemap_write_and_wait(inode->i_mapping);
1466 cifsInode->write_behind_rc = rc;
1471 if (attrs->ia_valid & ATTR_SIZE) {
1472 /* To avoid spurious oplock breaks from server, in the case of
1473 inodes that we already have open, avoid doing path based
1474 setting of file size if we can do it by handle.
1475 This keeps our caching token (oplock) and avoids timeouts
1476 when the local oplock break takes longer to flush
1477 writebehind data than the SMB timeout for the SetPathInfo
1478 request would allow */
1480 open_file = find_writable_file(cifsInode);
1482 __u16 nfid = open_file->netfid;
1483 __u32 npid = open_file->pid;
1484 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1486 atomic_dec(&open_file->wrtPending);
1487 cFYI(1, ("SetFSize for attrs rc = %d", rc));
1488 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1489 unsigned int bytes_written;
1490 rc = CIFSSMBWrite(xid, pTcon,
1491 nfid, 0, attrs->ia_size,
1492 &bytes_written, NULL, NULL,
1493 1 /* 45 seconds */);
1494 cFYI(1, ("Wrt seteof rc %d", rc));
1500 /* Set file size by pathname rather than by handle
1501 either because no valid, writeable file handle for
1502 it was found or because there was an error setting
1504 rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1505 attrs->ia_size, false,
1507 cifs_sb->mnt_cifs_flags &
1508 CIFS_MOUNT_MAP_SPECIAL_CHR);
1509 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1510 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1514 rc = SMBLegacyOpen(xid, pTcon, full_path,
1515 FILE_OPEN, GENERIC_WRITE,
1516 CREATE_NOT_DIR, &netfid, &oplock,
1517 NULL, cifs_sb->local_nls,
1518 cifs_sb->mnt_cifs_flags &
1519 CIFS_MOUNT_MAP_SPECIAL_CHR);
1521 unsigned int bytes_written;
1522 rc = CIFSSMBWrite(xid, pTcon,
1525 &bytes_written, NULL,
1526 NULL, 1 /* 45 sec */);
1527 cFYI(1, ("wrt seteof rc %d", rc));
1528 CIFSSMBClose(xid, pTcon, netfid);
1534 /* Server is ok setting allocation size implicitly - no need
1536 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, true,
1537 cifs_sb->local_nls);
1541 rc = cifs_vmtruncate(inode, attrs->ia_size);
1542 cifs_truncate_page(inode->i_mapping, inode->i_size);
1544 goto cifs_setattr_exit;
1546 if (attrs->ia_valid & ATTR_UID) {
1547 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1548 uid = attrs->ia_uid;
1550 if (attrs->ia_valid & ATTR_GID) {
1551 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1552 gid = attrs->ia_gid;
1555 time_buf.Attributes = 0;
1557 /* skip mode change if it's just for clearing setuid/setgid */
1558 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1559 attrs->ia_valid &= ~ATTR_MODE;
1561 if (attrs->ia_valid & ATTR_MODE) {
1562 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1563 mode = attrs->ia_mode;
1566 if ((pTcon->unix_ext)
1567 && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1568 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
1569 0 /* dev_t */, cifs_sb->local_nls,
1570 cifs_sb->mnt_cifs_flags &
1571 CIFS_MOUNT_MAP_SPECIAL_CHR);
1572 else if (attrs->ia_valid & ATTR_MODE) {
1574 #ifdef CONFIG_CIFS_EXPERIMENTAL
1575 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
1576 rc = mode_to_acl(inode, full_path, mode);
1577 else if ((mode & S_IWUGO) == 0) {
1579 if ((mode & S_IWUGO) == 0) {
1582 if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
1584 time_buf.Attributes =
1585 cpu_to_le32(cifsInode->cifsAttrs |
1588 } else if (cifsInode->cifsAttrs & ATTR_READONLY) {
1589 /* If file is readonly on server, we would
1590 not be able to write to it - so if any write
1591 bit is enabled for user or group or other we
1592 need to at least try to remove r/o dos attr */
1594 time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs &
1596 /* Windows ignores set to zero */
1597 if (time_buf.Attributes == 0)
1598 time_buf.Attributes |= cpu_to_le32(ATTR_NORMAL);
1602 if (attrs->ia_valid & ATTR_ATIME) {
1604 time_buf.LastAccessTime =
1605 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1607 time_buf.LastAccessTime = 0;
1609 if (attrs->ia_valid & ATTR_MTIME) {
1611 time_buf.LastWriteTime =
1612 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1614 time_buf.LastWriteTime = 0;
1615 /* Do not set ctime explicitly unless other time
1616 stamps are changed explicitly (i.e. by utime()
1617 since we would then have a mix of client and
1620 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1622 /* Although Samba throws this field away
1623 it may be useful to Windows - but we do
1624 not want to set ctime unless some other
1625 timestamp is changing */
1626 cFYI(1, ("CIFS - CTIME changed"));
1627 time_buf.ChangeTime =
1628 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1630 time_buf.ChangeTime = 0;
1632 if (set_time || set_dosattr) {
1633 time_buf.CreationTime = 0; /* do not change */
1634 /* In the future we should experiment - try setting timestamps
1635 via Handle (SetFileInfo) instead of by path */
1636 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1637 rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
1639 cifs_sb->mnt_cifs_flags &
1640 CIFS_MOUNT_MAP_SPECIAL_CHR);
1644 if (rc == -EOPNOTSUPP) {
1648 cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1649 "times not supported by this server"));
1650 /* BB we could scan to see if we already have it open
1651 and pass in pid of opener to function */
1652 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1653 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1654 CREATE_NOT_DIR, &netfid, &oplock,
1655 NULL, cifs_sb->local_nls,
1656 cifs_sb->mnt_cifs_flags &
1657 CIFS_MOUNT_MAP_SPECIAL_CHR);
1659 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1661 CIFSSMBClose(xid, pTcon, netfid);
1663 /* BB For even older servers we could convert time_buf
1664 into old DOS style which uses two second
1667 /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1668 &time_buf, cifs_sb->local_nls); */
1671 /* Even if error on time set, no sense failing the call if
1672 the server would set the time to a reasonable value anyway,
1673 and this check ensures that we are not being called from
1674 sys_utimes in which case we ought to fail the call back to
1675 the user when the server rejects the call */
1676 if ((rc) && (attrs->ia_valid &
1677 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1681 /* do not need local check to inode_check_ok since the server does
1684 rc = inode_setattr(inode, attrs);
1692 void cifs_delete_inode(struct inode *inode)
1694 cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1695 /* may have to add back in if and when safe distributed caching of
1696 directories added e.g. via FindNotify */