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 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 struct cifs_unix_set_info_args args = {
991 .ctime = NO_CHANGE_64,
992 .atime = NO_CHANGE_64,
993 .mtime = NO_CHANGE_64,
996 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
997 args.uid = (__u64)current->fsuid;
998 args.gid = (__u64)current->fsgid;
1000 args.uid = NO_CHANGE_64;
1001 args.gid = NO_CHANGE_64;
1003 CIFSSMBUnixSetInfo(xid, pTcon, full_path, &args,
1005 cifs_sb->mnt_cifs_flags &
1006 CIFS_MOUNT_MAP_SPECIAL_CHR);
1008 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
1009 (mode & S_IWUGO) == 0) {
1010 FILE_BASIC_INFO pInfo;
1011 memset(&pInfo, 0, sizeof(pInfo));
1012 pInfo.Attributes = cpu_to_le32(ATTR_READONLY);
1013 CIFSSMBSetTimes(xid, pTcon, full_path,
1014 &pInfo, cifs_sb->local_nls,
1015 cifs_sb->mnt_cifs_flags &
1016 CIFS_MOUNT_MAP_SPECIAL_CHR);
1018 if (direntry->d_inode) {
1019 if (cifs_sb->mnt_cifs_flags &
1021 direntry->d_inode->i_mode =
1024 if (cifs_sb->mnt_cifs_flags &
1025 CIFS_MOUNT_SET_UID) {
1026 direntry->d_inode->i_uid =
1028 direntry->d_inode->i_gid =
1040 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1044 struct cifs_sb_info *cifs_sb;
1045 struct cifsTconInfo *pTcon;
1046 char *full_path = NULL;
1047 struct cifsInodeInfo *cifsInode;
1049 cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
1053 cifs_sb = CIFS_SB(inode->i_sb);
1054 pTcon = cifs_sb->tcon;
1056 full_path = build_path_from_dentry(direntry);
1057 if (full_path == NULL) {
1062 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1063 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1067 spin_lock(&direntry->d_inode->i_lock);
1068 i_size_write(direntry->d_inode, 0);
1069 clear_nlink(direntry->d_inode);
1070 spin_unlock(&direntry->d_inode->i_lock);
1073 cifsInode = CIFS_I(direntry->d_inode);
1074 cifsInode->time = 0; /* force revalidate to go get info when
1076 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1077 current_fs_time(inode->i_sb);
1084 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
1085 struct inode *target_inode, struct dentry *target_direntry)
1089 struct cifs_sb_info *cifs_sb_source;
1090 struct cifs_sb_info *cifs_sb_target;
1091 struct cifsTconInfo *pTcon;
1097 cifs_sb_target = CIFS_SB(target_inode->i_sb);
1098 cifs_sb_source = CIFS_SB(source_inode->i_sb);
1099 pTcon = cifs_sb_source->tcon;
1101 if (pTcon != cifs_sb_target->tcon) {
1103 return -EXDEV; /* BB actually could be allowed if same server,
1104 but different share.
1105 Might eventually add support for this */
1108 /* we already have the rename sem so we do not need to grab it again
1109 here to protect the path integrity */
1110 fromName = build_path_from_dentry(source_direntry);
1111 toName = build_path_from_dentry(target_direntry);
1112 if ((fromName == NULL) || (toName == NULL)) {
1114 goto cifs_rename_exit;
1117 rc = CIFSSMBRename(xid, pTcon, fromName, toName,
1118 cifs_sb_source->local_nls,
1119 cifs_sb_source->mnt_cifs_flags &
1120 CIFS_MOUNT_MAP_SPECIAL_CHR);
1121 if (rc == -EEXIST) {
1122 /* check if they are the same file because rename of hardlinked
1124 FILE_UNIX_BASIC_INFO *info_buf_source;
1125 FILE_UNIX_BASIC_INFO *info_buf_target;
1128 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1129 if (info_buf_source != NULL) {
1130 info_buf_target = info_buf_source + 1;
1131 if (pTcon->unix_ext)
1132 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
1134 cifs_sb_source->local_nls,
1135 cifs_sb_source->mnt_cifs_flags &
1136 CIFS_MOUNT_MAP_SPECIAL_CHR);
1137 /* else rc is still EEXIST so will fall through to
1138 unlink the target and retry rename */
1140 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
1142 cifs_sb_target->local_nls,
1143 /* remap based on source sb */
1144 cifs_sb_source->mnt_cifs_flags &
1145 CIFS_MOUNT_MAP_SPECIAL_CHR);
1148 (info_buf_source->UniqueId ==
1149 info_buf_target->UniqueId)) {
1150 /* do not rename since the files are hardlinked which
1153 /* we either can not tell the files are hardlinked
1154 (as with Windows servers) or files are not
1155 hardlinked so delete the target manually before
1156 renaming to follow POSIX rather than Windows
1158 cifs_unlink(target_inode, target_direntry);
1159 rc = CIFSSMBRename(xid, pTcon, fromName,
1161 cifs_sb_source->local_nls,
1162 cifs_sb_source->mnt_cifs_flags
1163 & CIFS_MOUNT_MAP_SPECIAL_CHR);
1165 kfree(info_buf_source);
1166 } /* if we can not get memory just leave rc as EEXIST */
1170 cFYI(1, ("rename rc %d", rc));
1172 if ((rc == -EIO) || (rc == -EEXIST)) {
1176 /* BB FIXME Is Generic Read correct for rename? */
1177 /* if renaming directory - we should not say CREATE_NOT_DIR,
1178 need to test renaming open directory, also GENERIC_READ
1179 might not right be right access to request */
1180 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
1181 CREATE_NOT_DIR, &netfid, &oplock, NULL,
1182 cifs_sb_source->local_nls,
1183 cifs_sb_source->mnt_cifs_flags &
1184 CIFS_MOUNT_MAP_SPECIAL_CHR);
1186 rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
1187 cifs_sb_source->local_nls,
1188 cifs_sb_source->mnt_cifs_flags &
1189 CIFS_MOUNT_MAP_SPECIAL_CHR);
1190 CIFSSMBClose(xid, pTcon, netfid);
1201 int cifs_revalidate(struct dentry *direntry)
1204 int rc = 0, wbrc = 0;
1206 struct cifs_sb_info *cifs_sb;
1207 struct cifsInodeInfo *cifsInode;
1209 struct timespec local_mtime;
1210 bool invalidate_inode = false;
1212 if (direntry->d_inode == NULL)
1215 cifsInode = CIFS_I(direntry->d_inode);
1217 if (cifsInode == NULL)
1220 /* no sense revalidating inode info on file that no one can write */
1221 if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
1226 cifs_sb = CIFS_SB(direntry->d_sb);
1228 /* can not safely grab the rename sem here if rename calls revalidate
1229 since that would deadlock */
1230 full_path = build_path_from_dentry(direntry);
1231 if (full_path == NULL) {
1235 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1236 "jiffies %ld", full_path, direntry->d_inode,
1237 direntry->d_inode->i_count.counter, direntry,
1238 direntry->d_time, jiffies));
1240 if (cifsInode->time == 0) {
1241 /* was set to zero previously to force revalidate */
1242 } else if (time_before(jiffies, cifsInode->time + HZ) &&
1243 lookupCacheEnabled) {
1244 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1245 (direntry->d_inode->i_nlink == 1)) {
1250 cFYI(1, ("Have to revalidate file due to hardlinks"));
1254 /* save mtime and size */
1255 local_mtime = direntry->d_inode->i_mtime;
1256 local_size = direntry->d_inode->i_size;
1258 if (cifs_sb->tcon->unix_ext) {
1259 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1260 direntry->d_sb, xid);
1262 cFYI(1, ("error on getting revalidate info %d", rc));
1263 /* if (rc != -ENOENT)
1264 rc = 0; */ /* BB should we cache info on
1268 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1269 direntry->d_sb, xid, NULL);
1271 cFYI(1, ("error on getting revalidate info %d", rc));
1272 /* if (rc != -ENOENT)
1273 rc = 0; */ /* BB should we cache info on
1277 /* should we remap certain errors, access denied?, to zero */
1279 /* if not oplocked, we invalidate inode pages if mtime or file size
1280 had changed on server */
1282 if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) &&
1283 (local_size == direntry->d_inode->i_size)) {
1284 cFYI(1, ("cifs_revalidate - inode unchanged"));
1286 /* file may have changed on server */
1287 if (cifsInode->clientCanCacheRead) {
1288 /* no need to invalidate inode pages since we were the
1289 only ones who could have modified the file and the
1290 server copy is staler than ours */
1292 invalidate_inode = true;
1296 /* can not grab this sem since kernel filesys locking documentation
1297 indicates i_mutex may be taken by the kernel on lookup and rename
1298 which could deadlock if we grab the i_mutex here as well */
1299 /* mutex_lock(&direntry->d_inode->i_mutex);*/
1300 /* need to write out dirty pages here */
1301 if (direntry->d_inode->i_mapping) {
1302 /* do we need to lock inode until after invalidate completes
1304 wbrc = filemap_fdatawrite(direntry->d_inode->i_mapping);
1306 CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1308 if (invalidate_inode) {
1309 /* shrink_dcache not necessary now that cifs dentry ops
1310 are exported for negative dentries */
1311 /* if (S_ISDIR(direntry->d_inode->i_mode))
1312 shrink_dcache_parent(direntry); */
1313 if (S_ISREG(direntry->d_inode->i_mode)) {
1314 if (direntry->d_inode->i_mapping) {
1315 wbrc = filemap_fdatawait(direntry->d_inode->i_mapping);
1317 CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1319 /* may eventually have to do this for open files too */
1320 if (list_empty(&(cifsInode->openFileList))) {
1321 /* changed on server - flush read ahead pages */
1322 cFYI(1, ("Invalidating read ahead data on "
1324 invalidate_remote_inode(direntry->d_inode);
1328 /* mutex_unlock(&direntry->d_inode->i_mutex); */
1335 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1338 int err = cifs_revalidate(dentry);
1340 generic_fillattr(dentry->d_inode, stat);
1341 stat->blksize = CIFS_MAX_MSGSIZE;
1346 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1348 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1349 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1353 page = grab_cache_page(mapping, index);
1357 zero_user_segment(page, offset, PAGE_CACHE_SIZE);
1359 page_cache_release(page);
1363 static int cifs_vmtruncate(struct inode *inode, loff_t offset)
1365 struct address_space *mapping = inode->i_mapping;
1366 unsigned long limit;
1368 spin_lock(&inode->i_lock);
1369 if (inode->i_size < offset)
1372 * truncation of in-use swapfiles is disallowed - it would cause
1373 * subsequent swapout to scribble on the now-freed blocks.
1375 if (IS_SWAPFILE(inode)) {
1376 spin_unlock(&inode->i_lock);
1379 i_size_write(inode, offset);
1380 spin_unlock(&inode->i_lock);
1382 * unmap_mapping_range is called twice, first simply for efficiency
1383 * so that truncate_inode_pages does fewer single-page unmaps. However
1384 * after this first call, and before truncate_inode_pages finishes,
1385 * it is possible for private pages to be COWed, which remain after
1386 * truncate_inode_pages finishes, hence the second unmap_mapping_range
1387 * call must be made for correctness.
1389 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1390 truncate_inode_pages(mapping, offset);
1391 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1395 limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
1396 if (limit != RLIM_INFINITY && offset > limit) {
1397 spin_unlock(&inode->i_lock);
1400 if (offset > inode->i_sb->s_maxbytes) {
1401 spin_unlock(&inode->i_lock);
1404 i_size_write(inode, offset);
1405 spin_unlock(&inode->i_lock);
1407 if (inode->i_op && inode->i_op->truncate)
1408 inode->i_op->truncate(inode);
1411 send_sig(SIGXFSZ, current, 0);
1419 cifs_set_file_size(struct inode *inode, struct iattr *attrs,
1420 int xid, char *full_path)
1423 struct cifsFileInfo *open_file;
1424 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1425 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1426 struct cifsTconInfo *pTcon = cifs_sb->tcon;
1429 * To avoid spurious oplock breaks from server, in the case of
1430 * inodes that we already have open, avoid doing path based
1431 * setting of file size if we can do it by handle.
1432 * This keeps our caching token (oplock) and avoids timeouts
1433 * when the local oplock break takes longer to flush
1434 * writebehind data than the SMB timeout for the SetPathInfo
1435 * request would allow
1437 open_file = find_writable_file(cifsInode);
1439 __u16 nfid = open_file->netfid;
1440 __u32 npid = open_file->pid;
1441 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size, nfid,
1443 atomic_dec(&open_file->wrtPending);
1444 cFYI(1, ("SetFSize for attrs rc = %d", rc));
1445 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1446 unsigned int bytes_written;
1447 rc = CIFSSMBWrite(xid, pTcon, nfid, 0, attrs->ia_size,
1448 &bytes_written, NULL, NULL, 1);
1449 cFYI(1, ("Wrt seteof rc %d", rc));
1455 /* Set file size by pathname rather than by handle
1456 either because no valid, writeable file handle for
1457 it was found or because there was an error setting
1459 rc = CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size,
1460 false, cifs_sb->local_nls,
1461 cifs_sb->mnt_cifs_flags &
1462 CIFS_MOUNT_MAP_SPECIAL_CHR);
1463 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1464 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1468 rc = SMBLegacyOpen(xid, pTcon, full_path,
1469 FILE_OPEN, GENERIC_WRITE,
1470 CREATE_NOT_DIR, &netfid, &oplock, NULL,
1472 cifs_sb->mnt_cifs_flags &
1473 CIFS_MOUNT_MAP_SPECIAL_CHR);
1475 unsigned int bytes_written;
1476 rc = CIFSSMBWrite(xid, pTcon, netfid, 0,
1478 &bytes_written, NULL,
1480 cFYI(1, ("wrt seteof rc %d", rc));
1481 CIFSSMBClose(xid, pTcon, netfid);
1487 rc = cifs_vmtruncate(inode, attrs->ia_size);
1488 cifs_truncate_page(inode->i_mapping, inode->i_size);
1494 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1497 struct cifs_sb_info *cifs_sb;
1498 struct cifsTconInfo *pTcon;
1499 char *full_path = NULL;
1501 FILE_BASIC_INFO time_buf;
1502 bool set_time = false;
1503 bool set_dosattr = false;
1504 __u64 mode = NO_CHANGE_64;
1505 __u64 uid = NO_CHANGE_64;
1506 __u64 gid = NO_CHANGE_64;
1507 struct cifsInodeInfo *cifsInode;
1508 struct inode *inode = direntry->d_inode;
1512 cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1513 direntry->d_name.name, attrs->ia_valid));
1515 cifs_sb = CIFS_SB(inode->i_sb);
1516 pTcon = cifs_sb->tcon;
1518 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1519 /* check if we have permission to change attrs */
1520 rc = inode_change_ok(inode, attrs);
1528 full_path = build_path_from_dentry(direntry);
1529 if (full_path == NULL) {
1533 cifsInode = CIFS_I(inode);
1535 if ((attrs->ia_valid & ATTR_MTIME) || (attrs->ia_valid & ATTR_SIZE)) {
1537 Flush data before changing file size or changing the last
1538 write time of the file on the server. If the
1539 flush returns error, store it to report later and continue.
1540 BB: This should be smarter. Why bother flushing pages that
1541 will be truncated anyway? Also, should we error out here if
1542 the flush returns error?
1544 rc = filemap_write_and_wait(inode->i_mapping);
1546 cifsInode->write_behind_rc = rc;
1551 if (attrs->ia_valid & ATTR_SIZE) {
1552 rc = cifs_set_file_size(inode, attrs, xid, full_path);
1554 goto cifs_setattr_exit;
1558 * Without unix extensions we can't send ownership changes to the
1559 * server, so silently ignore them. This is consistent with how
1560 * local DOS/Windows filesystems behave (VFAT, NTFS, etc). With
1561 * CIFSACL support + proper Windows to Unix idmapping, we may be
1562 * able to support this in the future.
1564 if (!pTcon->unix_ext &&
1565 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) {
1566 attrs->ia_valid &= ~(ATTR_UID | ATTR_GID);
1568 if (attrs->ia_valid & ATTR_UID) {
1569 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1570 uid = attrs->ia_uid;
1572 if (attrs->ia_valid & ATTR_GID) {
1573 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1574 gid = attrs->ia_gid;
1578 time_buf.Attributes = 0;
1580 /* skip mode change if it's just for clearing setuid/setgid */
1581 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1582 attrs->ia_valid &= ~ATTR_MODE;
1584 if (attrs->ia_valid & ATTR_MODE) {
1585 cFYI(1, ("Mode changed to 0%o", attrs->ia_mode));
1586 mode = attrs->ia_mode;
1589 if ((pTcon->unix_ext)
1590 && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID))) {
1591 struct cifs_unix_set_info_args args = {
1595 .ctime = NO_CHANGE_64,
1596 .atime = NO_CHANGE_64,
1597 .mtime = NO_CHANGE_64,
1600 rc = CIFSSMBUnixSetInfo(xid, pTcon, full_path, &args,
1602 cifs_sb->mnt_cifs_flags &
1603 CIFS_MOUNT_MAP_SPECIAL_CHR);
1604 } else if (attrs->ia_valid & ATTR_MODE) {
1606 #ifdef CONFIG_CIFS_EXPERIMENTAL
1607 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
1608 rc = mode_to_acl(inode, full_path, mode);
1611 if (((mode & S_IWUGO) == 0) &&
1612 (cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
1614 time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs |
1616 /* fix up mode if we're not using dynperm */
1617 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
1618 attrs->ia_mode = inode->i_mode & ~S_IWUGO;
1619 } else if ((mode & S_IWUGO) &&
1620 (cifsInode->cifsAttrs & ATTR_READONLY)) {
1621 /* If file is readonly on server, we would
1622 not be able to write to it - so if any write
1623 bit is enabled for user or group or other we
1624 need to at least try to remove r/o dos attr */
1626 time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs &
1628 /* Windows ignores set to zero */
1629 if (time_buf.Attributes == 0)
1630 time_buf.Attributes |= cpu_to_le32(ATTR_NORMAL);
1632 /* reset local inode permissions to normal */
1633 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
1634 attrs->ia_mode &= ~(S_IALLUGO);
1635 if (S_ISDIR(inode->i_mode))
1637 cifs_sb->mnt_dir_mode;
1640 cifs_sb->mnt_file_mode;
1642 } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
1643 /* ignore mode change - ATTR_READONLY hasn't changed */
1644 attrs->ia_valid &= ~ATTR_MODE;
1648 if (attrs->ia_valid & ATTR_ATIME) {
1650 time_buf.LastAccessTime =
1651 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1653 time_buf.LastAccessTime = 0;
1655 if (attrs->ia_valid & ATTR_MTIME) {
1657 time_buf.LastWriteTime =
1658 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1660 time_buf.LastWriteTime = 0;
1661 /* Do not set ctime explicitly unless other time
1662 stamps are changed explicitly (i.e. by utime()
1663 since we would then have a mix of client and
1666 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1668 /* Although Samba throws this field away
1669 it may be useful to Windows - but we do
1670 not want to set ctime unless some other
1671 timestamp is changing */
1672 cFYI(1, ("CIFS - CTIME changed"));
1673 time_buf.ChangeTime =
1674 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1676 time_buf.ChangeTime = 0;
1678 if (set_time || set_dosattr) {
1679 time_buf.CreationTime = 0; /* do not change */
1680 /* In the future we should experiment - try setting timestamps
1681 via Handle (SetFileInfo) instead of by path */
1682 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1683 rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
1685 cifs_sb->mnt_cifs_flags &
1686 CIFS_MOUNT_MAP_SPECIAL_CHR);
1690 if (rc == -EOPNOTSUPP) {
1694 cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1695 "times not supported by this server"));
1696 /* BB we could scan to see if we already have it open
1697 and pass in pid of opener to function */
1698 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1699 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1700 CREATE_NOT_DIR, &netfid, &oplock,
1701 NULL, cifs_sb->local_nls,
1702 cifs_sb->mnt_cifs_flags &
1703 CIFS_MOUNT_MAP_SPECIAL_CHR);
1705 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1707 CIFSSMBClose(xid, pTcon, netfid);
1709 /* BB For even older servers we could convert time_buf
1710 into old DOS style which uses two second
1713 /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1714 &time_buf, cifs_sb->local_nls); */
1717 /* Even if error on time set, no sense failing the call if
1718 the server would set the time to a reasonable value anyway,
1719 and this check ensures that we are not being called from
1720 sys_utimes in which case we ought to fail the call back to
1721 the user when the server rejects the call */
1722 if ((rc) && (attrs->ia_valid &
1723 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1727 /* do not need local check to inode_check_ok since the server does
1730 rc = inode_setattr(inode, attrs);
1738 void cifs_delete_inode(struct inode *inode)
1740 cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1741 /* may have to add back in if and when safe distributed caching of
1742 directories added e.g. via FindNotify */