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);
550 inode->i_mode &= ~S_IFMT;
552 /* clear write bits if ATTR_READONLY is set */
553 if (attr & ATTR_READONLY)
554 inode->i_mode &= ~S_IWUGO;
557 if ((attr & ATTR_SYSTEM) &&
558 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) {
559 /* no need to fix endianness on 0 */
560 if (pfindData->EndOfFile == 0)
561 inode->i_mode |= S_IFIFO;
562 else if (decode_sfu_inode(inode,
563 le64_to_cpu(pfindData->EndOfFile),
564 full_path, cifs_sb, xid))
565 cFYI(1, ("unknown SFU file type\n"));
567 if (attr & ATTR_DIRECTORY)
568 inode->i_mode |= S_IFDIR;
570 inode->i_mode |= S_IFREG;
573 spin_lock(&inode->i_lock);
574 if (is_size_safe_to_change(cifsInfo,
575 le64_to_cpu(pfindData->EndOfFile))) {
576 /* can not safely shrink the file size here if the
577 client is writing to it due to potential races */
578 i_size_write(inode, le64_to_cpu(pfindData->EndOfFile));
580 /* 512 bytes (2**9) is the fake blocksize that must be
581 used for this calculation */
582 inode->i_blocks = (512 - 1 + le64_to_cpu(
583 pfindData->AllocationSize)) >> 9;
585 spin_unlock(&inode->i_lock);
587 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
589 /* BB fill in uid and gid here? with help from winbind?
590 or retrieve from NTFS stream extended attribute */
591 #ifdef CONFIG_CIFS_EXPERIMENTAL
592 /* fill in 0777 bits from ACL */
593 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
594 cFYI(1, ("Getting mode bits from ACL"));
595 acl_to_uid_mode(inode, full_path, pfid);
598 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
599 /* fill in remaining high mode bits e.g. SUID, VTX */
600 get_sfu_mode(inode, full_path, cifs_sb, xid);
601 } else if (atomic_read(&cifsInfo->inUse) == 0) {
602 inode->i_uid = cifs_sb->mnt_uid;
603 inode->i_gid = cifs_sb->mnt_gid;
604 /* set so we do not keep refreshing these fields with
605 bad data after user has changed them in memory */
606 atomic_set(&cifsInfo->inUse, 1);
609 cifs_set_ops(inode, is_dfs_referral);
619 static const struct inode_operations cifs_ipc_inode_ops = {
620 .lookup = cifs_lookup,
623 /* gets root inode */
624 struct inode *cifs_iget(struct super_block *sb, unsigned long ino)
627 struct cifs_sb_info *cifs_sb;
631 inode = iget_locked(sb, ino);
633 return ERR_PTR(-ENOMEM);
634 if (!(inode->i_state & I_NEW))
637 cifs_sb = CIFS_SB(inode->i_sb);
640 if (cifs_sb->tcon->unix_ext)
641 rc = cifs_get_inode_info_unix(&inode, "", inode->i_sb, xid);
643 rc = cifs_get_inode_info(&inode, "", NULL, inode->i_sb, xid,
645 if (rc && cifs_sb->tcon->ipc) {
646 cFYI(1, ("ipc connection - fake read inode"));
647 inode->i_mode |= S_IFDIR;
649 inode->i_op = &cifs_ipc_inode_ops;
650 inode->i_fop = &simple_dir_operations;
651 inode->i_uid = cifs_sb->mnt_uid;
652 inode->i_gid = cifs_sb->mnt_gid;
659 unlock_new_inode(inode);
661 /* can not call macro FreeXid here since in a void func
662 * TODO: This is no longer true
669 cifs_set_file_info(struct inode *inode, struct iattr *attrs, int xid,
670 char *full_path, __u32 dosattr)
676 bool set_time = false;
677 struct cifsFileInfo *open_file;
678 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
679 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
680 struct cifsTconInfo *pTcon = cifs_sb->tcon;
681 FILE_BASIC_INFO info_buf;
683 if (attrs->ia_valid & ATTR_ATIME) {
685 info_buf.LastAccessTime =
686 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
688 info_buf.LastAccessTime = 0;
690 if (attrs->ia_valid & ATTR_MTIME) {
692 info_buf.LastWriteTime =
693 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
695 info_buf.LastWriteTime = 0;
698 * Samba throws this field away, but windows may actually use it.
699 * Do not set ctime unless other time stamps are changed explicitly
700 * (i.e. by utimes()) since we would then have a mix of client and
703 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
704 cFYI(1, ("CIFS - CTIME changed"));
705 info_buf.ChangeTime =
706 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
708 info_buf.ChangeTime = 0;
710 info_buf.CreationTime = 0; /* don't change */
711 info_buf.Attributes = cpu_to_le32(dosattr);
714 * If the file is already open for write, just use that fileid
716 open_file = find_writable_file(cifsInode);
718 netfid = open_file->netfid;
719 netpid = open_file->pid;
720 goto set_via_filehandle;
724 * NT4 apparently returns success on this call, but it doesn't
727 if (!(pTcon->ses->flags & CIFS_SES_NT4)) {
728 rc = CIFSSMBSetPathInfo(xid, pTcon, full_path,
729 &info_buf, cifs_sb->local_nls,
730 cifs_sb->mnt_cifs_flags &
731 CIFS_MOUNT_MAP_SPECIAL_CHR);
733 cifsInode->cifsAttrs = dosattr;
735 } else if (rc != -EOPNOTSUPP && rc != -EINVAL)
739 cFYI(1, ("calling SetFileInfo since SetPathInfo for "
740 "times not supported by this server"));
741 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
742 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
743 CREATE_NOT_DIR, &netfid, &oplock,
744 NULL, cifs_sb->local_nls,
745 cifs_sb->mnt_cifs_flags &
746 CIFS_MOUNT_MAP_SPECIAL_CHR);
754 netpid = current->tgid;
757 rc = CIFSSMBSetFileInfo(xid, pTcon, &info_buf, netfid, netpid);
759 cifsInode->cifsAttrs = dosattr;
761 if (open_file == NULL)
762 CIFSSMBClose(xid, pTcon, netfid);
764 atomic_dec(&open_file->wrtPending);
770 * open the given file (if it isn't already), set the DELETE_ON_CLOSE bit
771 * and rename it to a random name that hopefully won't conflict with
775 cifs_rename_pending_delete(char *full_path, struct inode *inode, int xid)
780 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
781 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
782 struct cifsTconInfo *tcon = cifs_sb->tcon;
784 FILE_BASIC_INFO *info_buf;
786 rc = CIFSSMBOpen(xid, tcon, full_path, FILE_OPEN,
787 DELETE|FILE_WRITE_ATTRIBUTES, CREATE_NOT_DIR,
788 &netfid, &oplock, NULL, cifs_sb->local_nls,
789 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
793 /* set ATTR_HIDDEN and clear ATTR_READONLY */
794 cifsInode = CIFS_I(inode);
795 dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
797 dosattr |= ATTR_NORMAL;
798 dosattr |= ATTR_HIDDEN;
800 info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL);
801 if (info_buf == NULL) {
805 info_buf->Attributes = cpu_to_le32(dosattr);
806 rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid, current->tgid);
810 cifsInode->cifsAttrs = dosattr;
812 /* rename the file */
813 rc = CIFSSMBRenameOpenFile(xid, tcon, netfid, NULL, cifs_sb->local_nls,
814 cifs_sb->mnt_cifs_flags &
815 CIFS_MOUNT_MAP_SPECIAL_CHR);
819 /* set DELETE_ON_CLOSE */
820 rc = CIFSSMBSetFileDisposition(xid, tcon, true, netfid, current->tgid);
823 * some samba versions return -ENOENT when we try to set the file
824 * disposition here. Likely a samba bug, but work around it for now.
825 * This means that some cifsXXX files may hang around after they
828 * BB: remove this once fixed samba servers are in the field
834 CIFSSMBClose(xid, tcon, netfid);
839 int cifs_unlink(struct inode *dir, struct dentry *dentry)
843 char *full_path = NULL;
844 struct inode *inode = dentry->d_inode;
845 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
846 struct super_block *sb = dir->i_sb;
847 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
848 struct cifsTconInfo *tcon = cifs_sb->tcon;
849 struct iattr *attrs = NULL;
850 __u32 dosattr = 0, origattr = 0;
852 cFYI(1, ("cifs_unlink, dir=0x%p, dentry=0x%p", dir, dentry));
856 /* Unlink can be called from rename so we can not take the
857 * sb->s_vfs_rename_mutex here */
858 full_path = build_path_from_dentry(dentry);
859 if (full_path == NULL) {
864 if ((tcon->ses->capabilities & CAP_UNIX) &&
865 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
866 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
867 rc = CIFSPOSIXDelFile(xid, tcon, full_path,
868 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
869 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
870 cFYI(1, ("posix del rc %d", rc));
871 if ((rc == 0) || (rc == -ENOENT))
872 goto psx_del_no_retry;
876 rc = CIFSSMBDelFile(xid, tcon, full_path, cifs_sb->local_nls,
877 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
883 } else if (rc == -ENOENT) {
885 } else if (rc == -ETXTBSY) {
886 rc = cifs_rename_pending_delete(full_path, inode, xid);
889 } else if (rc == -EACCES && dosattr == 0) {
890 attrs = kzalloc(sizeof(*attrs), GFP_KERNEL);
896 /* try to reset dos attributes */
897 origattr = cifsInode->cifsAttrs;
899 origattr |= ATTR_NORMAL;
900 dosattr = origattr & ~ATTR_READONLY;
902 dosattr |= ATTR_NORMAL;
903 dosattr |= ATTR_HIDDEN;
905 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
909 goto retry_std_delete;
912 /* undo the setattr if we errored out and it's needed */
913 if (rc != 0 && dosattr != 0)
914 cifs_set_file_info(inode, attrs, xid, full_path, origattr);
918 cifsInode = CIFS_I(inode);
919 cifsInode->time = 0; /* will force revalidate to get info
921 inode->i_ctime = current_fs_time(sb);
923 dir->i_ctime = dir->i_mtime = current_fs_time(sb);
924 cifsInode = CIFS_I(dir);
925 CIFS_I(dir)->time = 0; /* force revalidate of dir as well */
933 static void posix_fill_in_inode(struct inode *tmp_inode,
934 FILE_UNIX_BASIC_INFO *pData, int isNewInode)
936 struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
938 struct timespec local_mtime;
940 cifsInfo->time = jiffies;
941 atomic_inc(&cifsInfo->inUse);
943 /* save mtime and size */
944 local_mtime = tmp_inode->i_mtime;
945 local_size = tmp_inode->i_size;
947 cifs_unix_info_to_inode(tmp_inode, pData, 1);
948 cifs_set_ops(tmp_inode, false);
950 if (!S_ISREG(tmp_inode->i_mode))
954 * No sense invalidating pages for new inode
955 * since we we have not started caching
956 * readahead file data yet.
961 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
962 (local_size == tmp_inode->i_size)) {
963 cFYI(1, ("inode exists but unchanged"));
965 /* file may have changed on server */
966 cFYI(1, ("invalidate inode, readdir detected change"));
967 invalidate_remote_inode(tmp_inode);
971 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
975 struct cifs_sb_info *cifs_sb;
976 struct cifsTconInfo *pTcon;
977 char *full_path = NULL;
978 struct inode *newinode = NULL;
980 cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
984 cifs_sb = CIFS_SB(inode->i_sb);
985 pTcon = cifs_sb->tcon;
987 full_path = build_path_from_dentry(direntry);
988 if (full_path == NULL) {
993 if ((pTcon->ses->capabilities & CAP_UNIX) &&
994 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
995 le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
997 FILE_UNIX_BASIC_INFO *pInfo =
998 kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1004 mode &= ~current->fs->umask;
1005 rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT,
1006 mode, NULL /* netfid */, pInfo, &oplock,
1007 full_path, cifs_sb->local_nls,
1008 cifs_sb->mnt_cifs_flags &
1009 CIFS_MOUNT_MAP_SPECIAL_CHR);
1010 if (rc == -EOPNOTSUPP) {
1012 goto mkdir_retry_old;
1014 cFYI(1, ("posix mkdir returned 0x%x", rc));
1017 if (pInfo->Type == cpu_to_le32(-1)) {
1018 /* no return info, go query for it */
1020 goto mkdir_get_info;
1022 /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
1026 direntry->d_op = &cifs_ci_dentry_ops;
1028 direntry->d_op = &cifs_dentry_ops;
1030 newinode = new_inode(inode->i_sb);
1031 if (newinode == NULL) {
1033 goto mkdir_get_info;
1036 /* Is an i_ino of zero legal? */
1037 /* Are there sanity checks we can use to ensure that
1038 the server is really filling in that field? */
1039 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
1041 (unsigned long)pInfo->UniqueId;
1042 } /* note ino incremented to unique num in new_inode */
1043 if (inode->i_sb->s_flags & MS_NOATIME)
1044 newinode->i_flags |= S_NOATIME | S_NOCMTIME;
1045 newinode->i_nlink = 2;
1047 insert_inode_hash(newinode);
1048 d_instantiate(direntry, newinode);
1050 /* we already checked in POSIXCreate whether
1051 frame was long enough */
1052 posix_fill_in_inode(direntry->d_inode,
1053 pInfo, 1 /* NewInode */);
1054 #ifdef CONFIG_CIFS_DEBUG2
1055 cFYI(1, ("instantiated dentry %p %s to inode %p",
1056 direntry, direntry->d_name.name, newinode));
1058 if (newinode->i_nlink != 2)
1059 cFYI(1, ("unexpected number of links %d",
1060 newinode->i_nlink));
1067 /* BB add setting the equivalent of mode via CreateX w/ACLs */
1068 rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
1069 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1071 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
1076 if (pTcon->unix_ext)
1077 rc = cifs_get_inode_info_unix(&newinode, full_path,
1080 rc = cifs_get_inode_info(&newinode, full_path, NULL,
1081 inode->i_sb, xid, NULL);
1084 direntry->d_op = &cifs_ci_dentry_ops;
1086 direntry->d_op = &cifs_dentry_ops;
1087 d_instantiate(direntry, newinode);
1088 /* setting nlink not necessary except in cases where we
1089 * failed to get it from the server or was set bogus */
1090 if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
1091 direntry->d_inode->i_nlink = 2;
1093 mode &= ~current->fs->umask;
1094 /* must turn on setgid bit if parent dir has it */
1095 if (inode->i_mode & S_ISGID)
1098 if (pTcon->unix_ext) {
1099 struct cifs_unix_set_info_args args = {
1101 .ctime = NO_CHANGE_64,
1102 .atime = NO_CHANGE_64,
1103 .mtime = NO_CHANGE_64,
1106 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1107 args.uid = (__u64)current->fsuid;
1108 if (inode->i_mode & S_ISGID)
1109 args.gid = (__u64)inode->i_gid;
1111 args.gid = (__u64)current->fsgid;
1113 args.uid = NO_CHANGE_64;
1114 args.gid = NO_CHANGE_64;
1116 CIFSSMBUnixSetInfo(xid, pTcon, full_path, &args,
1118 cifs_sb->mnt_cifs_flags &
1119 CIFS_MOUNT_MAP_SPECIAL_CHR);
1121 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
1122 (mode & S_IWUGO) == 0) {
1123 FILE_BASIC_INFO pInfo;
1124 struct cifsInodeInfo *cifsInode;
1127 memset(&pInfo, 0, sizeof(pInfo));
1128 cifsInode = CIFS_I(newinode);
1129 dosattrs = cifsInode->cifsAttrs|ATTR_READONLY;
1130 pInfo.Attributes = cpu_to_le32(dosattrs);
1131 tmprc = CIFSSMBSetPathInfo(xid, pTcon,
1134 cifs_sb->mnt_cifs_flags &
1135 CIFS_MOUNT_MAP_SPECIAL_CHR);
1137 cifsInode->cifsAttrs = dosattrs;
1139 if (direntry->d_inode) {
1140 if (cifs_sb->mnt_cifs_flags &
1142 direntry->d_inode->i_mode =
1145 if (cifs_sb->mnt_cifs_flags &
1146 CIFS_MOUNT_SET_UID) {
1147 direntry->d_inode->i_uid =
1149 if (inode->i_mode & S_ISGID)
1150 direntry->d_inode->i_gid =
1153 direntry->d_inode->i_gid =
1165 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1169 struct cifs_sb_info *cifs_sb;
1170 struct cifsTconInfo *pTcon;
1171 char *full_path = NULL;
1172 struct cifsInodeInfo *cifsInode;
1174 cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
1178 cifs_sb = CIFS_SB(inode->i_sb);
1179 pTcon = cifs_sb->tcon;
1181 full_path = build_path_from_dentry(direntry);
1182 if (full_path == NULL) {
1187 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1188 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1192 spin_lock(&direntry->d_inode->i_lock);
1193 i_size_write(direntry->d_inode, 0);
1194 clear_nlink(direntry->d_inode);
1195 spin_unlock(&direntry->d_inode->i_lock);
1198 cifsInode = CIFS_I(direntry->d_inode);
1199 cifsInode->time = 0; /* force revalidate to go get info when
1201 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1202 current_fs_time(inode->i_sb);
1210 cifs_do_rename(int xid, struct dentry *from_dentry, const char *fromPath,
1211 struct dentry *to_dentry, const char *toPath)
1213 struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb);
1214 struct cifsTconInfo *pTcon = cifs_sb->tcon;
1218 /* try path-based rename first */
1219 rc = CIFSSMBRename(xid, pTcon, fromPath, toPath, cifs_sb->local_nls,
1220 cifs_sb->mnt_cifs_flags &
1221 CIFS_MOUNT_MAP_SPECIAL_CHR);
1224 * don't bother with rename by filehandle unless file is busy and
1225 * source Note that cross directory moves do not work with
1226 * rename by filehandle to various Windows servers.
1228 if (rc == 0 || rc != -ETXTBSY)
1231 /* open the file to be renamed -- we need DELETE perms */
1232 rc = CIFSSMBOpen(xid, pTcon, fromPath, FILE_OPEN, DELETE,
1233 CREATE_NOT_DIR, &srcfid, &oplock, NULL,
1234 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
1235 CIFS_MOUNT_MAP_SPECIAL_CHR);
1238 rc = CIFSSMBRenameOpenFile(xid, pTcon, srcfid,
1239 (const char *) to_dentry->d_name.name,
1240 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
1241 CIFS_MOUNT_MAP_SPECIAL_CHR);
1243 CIFSSMBClose(xid, pTcon, srcfid);
1249 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
1250 struct inode *target_inode, struct dentry *target_direntry)
1252 char *fromName = NULL;
1253 char *toName = NULL;
1254 struct cifs_sb_info *cifs_sb_source;
1255 struct cifs_sb_info *cifs_sb_target;
1256 struct cifsTconInfo *pTcon;
1257 FILE_UNIX_BASIC_INFO *info_buf_source = NULL;
1258 FILE_UNIX_BASIC_INFO *info_buf_target;
1262 cifs_sb_target = CIFS_SB(target_inode->i_sb);
1263 cifs_sb_source = CIFS_SB(source_inode->i_sb);
1264 pTcon = cifs_sb_source->tcon;
1269 * BB: this might be allowed if same server, but different share.
1270 * Consider adding support for this
1272 if (pTcon != cifs_sb_target->tcon) {
1274 goto cifs_rename_exit;
1278 * we already have the rename sem so we do not need to
1279 * grab it again here to protect the path integrity
1281 fromName = build_path_from_dentry(source_direntry);
1282 if (fromName == NULL) {
1284 goto cifs_rename_exit;
1287 toName = build_path_from_dentry(target_direntry);
1288 if (toName == NULL) {
1290 goto cifs_rename_exit;
1293 rc = cifs_do_rename(xid, source_direntry, fromName,
1294 target_direntry, toName);
1296 if (rc == -EEXIST) {
1297 if (pTcon->unix_ext) {
1299 * Are src and dst hardlinks of same inode? We can
1300 * only tell with unix extensions enabled
1303 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO),
1305 if (info_buf_source == NULL)
1308 info_buf_target = info_buf_source + 1;
1309 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
1311 cifs_sb_source->local_nls,
1312 cifs_sb_source->mnt_cifs_flags &
1313 CIFS_MOUNT_MAP_SPECIAL_CHR);
1317 rc = CIFSSMBUnixQPathInfo(xid, pTcon,
1318 toName, info_buf_target,
1319 cifs_sb_target->local_nls,
1320 /* remap based on source sb */
1321 cifs_sb_source->mnt_cifs_flags &
1322 CIFS_MOUNT_MAP_SPECIAL_CHR);
1324 if (rc == 0 && (info_buf_source->UniqueId ==
1325 info_buf_target->UniqueId))
1326 /* same file, POSIX says that this is a noop */
1327 goto cifs_rename_exit;
1328 } /* else ... BB we could add the same check for Windows by
1329 checking the UniqueId via FILE_INTERNAL_INFO */
1332 * we either can not tell the files are hardlinked (as with
1333 * Windows servers) or files are not hardlinked. Delete the
1334 * target manually before renaming to follow POSIX rather than
1337 cifs_unlink(target_inode, target_direntry);
1338 rc = cifs_do_rename(xid, source_direntry, fromName,
1339 target_direntry, toName);
1343 kfree(info_buf_source);
1350 int cifs_revalidate(struct dentry *direntry)
1353 int rc = 0, wbrc = 0;
1355 struct cifs_sb_info *cifs_sb;
1356 struct cifsInodeInfo *cifsInode;
1358 struct timespec local_mtime;
1359 bool invalidate_inode = false;
1361 if (direntry->d_inode == NULL)
1364 cifsInode = CIFS_I(direntry->d_inode);
1366 if (cifsInode == NULL)
1369 /* no sense revalidating inode info on file that no one can write */
1370 if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
1375 cifs_sb = CIFS_SB(direntry->d_sb);
1377 /* can not safely grab the rename sem here if rename calls revalidate
1378 since that would deadlock */
1379 full_path = build_path_from_dentry(direntry);
1380 if (full_path == NULL) {
1384 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1385 "jiffies %ld", full_path, direntry->d_inode,
1386 direntry->d_inode->i_count.counter, direntry,
1387 direntry->d_time, jiffies));
1389 if (cifsInode->time == 0) {
1390 /* was set to zero previously to force revalidate */
1391 } else if (time_before(jiffies, cifsInode->time + HZ) &&
1392 lookupCacheEnabled) {
1393 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1394 (direntry->d_inode->i_nlink == 1)) {
1399 cFYI(1, ("Have to revalidate file due to hardlinks"));
1403 /* save mtime and size */
1404 local_mtime = direntry->d_inode->i_mtime;
1405 local_size = direntry->d_inode->i_size;
1407 if (cifs_sb->tcon->unix_ext) {
1408 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1409 direntry->d_sb, xid);
1411 cFYI(1, ("error on getting revalidate info %d", rc));
1412 /* if (rc != -ENOENT)
1413 rc = 0; */ /* BB should we cache info on
1417 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1418 direntry->d_sb, xid, NULL);
1420 cFYI(1, ("error on getting revalidate info %d", rc));
1421 /* if (rc != -ENOENT)
1422 rc = 0; */ /* BB should we cache info on
1426 /* should we remap certain errors, access denied?, to zero */
1428 /* if not oplocked, we invalidate inode pages if mtime or file size
1429 had changed on server */
1431 if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) &&
1432 (local_size == direntry->d_inode->i_size)) {
1433 cFYI(1, ("cifs_revalidate - inode unchanged"));
1435 /* file may have changed on server */
1436 if (cifsInode->clientCanCacheRead) {
1437 /* no need to invalidate inode pages since we were the
1438 only ones who could have modified the file and the
1439 server copy is staler than ours */
1441 invalidate_inode = true;
1445 /* can not grab this sem since kernel filesys locking documentation
1446 indicates i_mutex may be taken by the kernel on lookup and rename
1447 which could deadlock if we grab the i_mutex here as well */
1448 /* mutex_lock(&direntry->d_inode->i_mutex);*/
1449 /* need to write out dirty pages here */
1450 if (direntry->d_inode->i_mapping) {
1451 /* do we need to lock inode until after invalidate completes
1453 wbrc = filemap_fdatawrite(direntry->d_inode->i_mapping);
1455 CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1457 if (invalidate_inode) {
1458 /* shrink_dcache not necessary now that cifs dentry ops
1459 are exported for negative dentries */
1460 /* if (S_ISDIR(direntry->d_inode->i_mode))
1461 shrink_dcache_parent(direntry); */
1462 if (S_ISREG(direntry->d_inode->i_mode)) {
1463 if (direntry->d_inode->i_mapping) {
1464 wbrc = filemap_fdatawait(direntry->d_inode->i_mapping);
1466 CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1468 /* may eventually have to do this for open files too */
1469 if (list_empty(&(cifsInode->openFileList))) {
1470 /* changed on server - flush read ahead pages */
1471 cFYI(1, ("Invalidating read ahead data on "
1473 invalidate_remote_inode(direntry->d_inode);
1477 /* mutex_unlock(&direntry->d_inode->i_mutex); */
1484 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1487 int err = cifs_revalidate(dentry);
1489 generic_fillattr(dentry->d_inode, stat);
1490 stat->blksize = CIFS_MAX_MSGSIZE;
1495 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1497 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1498 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1502 page = grab_cache_page(mapping, index);
1506 zero_user_segment(page, offset, PAGE_CACHE_SIZE);
1508 page_cache_release(page);
1512 static int cifs_vmtruncate(struct inode *inode, loff_t offset)
1514 struct address_space *mapping = inode->i_mapping;
1515 unsigned long limit;
1517 spin_lock(&inode->i_lock);
1518 if (inode->i_size < offset)
1521 * truncation of in-use swapfiles is disallowed - it would cause
1522 * subsequent swapout to scribble on the now-freed blocks.
1524 if (IS_SWAPFILE(inode)) {
1525 spin_unlock(&inode->i_lock);
1528 i_size_write(inode, offset);
1529 spin_unlock(&inode->i_lock);
1531 * unmap_mapping_range is called twice, first simply for efficiency
1532 * so that truncate_inode_pages does fewer single-page unmaps. However
1533 * after this first call, and before truncate_inode_pages finishes,
1534 * it is possible for private pages to be COWed, which remain after
1535 * truncate_inode_pages finishes, hence the second unmap_mapping_range
1536 * call must be made for correctness.
1538 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1539 truncate_inode_pages(mapping, offset);
1540 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1544 limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
1545 if (limit != RLIM_INFINITY && offset > limit) {
1546 spin_unlock(&inode->i_lock);
1549 if (offset > inode->i_sb->s_maxbytes) {
1550 spin_unlock(&inode->i_lock);
1553 i_size_write(inode, offset);
1554 spin_unlock(&inode->i_lock);
1556 if (inode->i_op && inode->i_op->truncate)
1557 inode->i_op->truncate(inode);
1560 send_sig(SIGXFSZ, current, 0);
1568 cifs_set_file_size(struct inode *inode, struct iattr *attrs,
1569 int xid, char *full_path)
1572 struct cifsFileInfo *open_file;
1573 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1574 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1575 struct cifsTconInfo *pTcon = cifs_sb->tcon;
1578 * To avoid spurious oplock breaks from server, in the case of
1579 * inodes that we already have open, avoid doing path based
1580 * setting of file size if we can do it by handle.
1581 * This keeps our caching token (oplock) and avoids timeouts
1582 * when the local oplock break takes longer to flush
1583 * writebehind data than the SMB timeout for the SetPathInfo
1584 * request would allow
1586 open_file = find_writable_file(cifsInode);
1588 __u16 nfid = open_file->netfid;
1589 __u32 npid = open_file->pid;
1590 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size, nfid,
1592 atomic_dec(&open_file->wrtPending);
1593 cFYI(1, ("SetFSize for attrs rc = %d", rc));
1594 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1595 unsigned int bytes_written;
1596 rc = CIFSSMBWrite(xid, pTcon, nfid, 0, attrs->ia_size,
1597 &bytes_written, NULL, NULL, 1);
1598 cFYI(1, ("Wrt seteof rc %d", rc));
1604 /* Set file size by pathname rather than by handle
1605 either because no valid, writeable file handle for
1606 it was found or because there was an error setting
1608 rc = CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size,
1609 false, cifs_sb->local_nls,
1610 cifs_sb->mnt_cifs_flags &
1611 CIFS_MOUNT_MAP_SPECIAL_CHR);
1612 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1613 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1617 rc = SMBLegacyOpen(xid, pTcon, full_path,
1618 FILE_OPEN, GENERIC_WRITE,
1619 CREATE_NOT_DIR, &netfid, &oplock, NULL,
1621 cifs_sb->mnt_cifs_flags &
1622 CIFS_MOUNT_MAP_SPECIAL_CHR);
1624 unsigned int bytes_written;
1625 rc = CIFSSMBWrite(xid, pTcon, netfid, 0,
1627 &bytes_written, NULL,
1629 cFYI(1, ("wrt seteof rc %d", rc));
1630 CIFSSMBClose(xid, pTcon, netfid);
1636 rc = cifs_vmtruncate(inode, attrs->ia_size);
1637 cifs_truncate_page(inode->i_mapping, inode->i_size);
1644 cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
1648 char *full_path = NULL;
1649 struct inode *inode = direntry->d_inode;
1650 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1651 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1652 struct cifsTconInfo *pTcon = cifs_sb->tcon;
1653 struct cifs_unix_set_info_args *args = NULL;
1655 cFYI(1, ("setattr_unix on file %s attrs->ia_valid=0x%x",
1656 direntry->d_name.name, attrs->ia_valid));
1660 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1661 /* check if we have permission to change attrs */
1662 rc = inode_change_ok(inode, attrs);
1669 full_path = build_path_from_dentry(direntry);
1670 if (full_path == NULL) {
1675 if ((attrs->ia_valid & ATTR_MTIME) || (attrs->ia_valid & ATTR_SIZE)) {
1677 Flush data before changing file size or changing the last
1678 write time of the file on the server. If the
1679 flush returns error, store it to report later and continue.
1680 BB: This should be smarter. Why bother flushing pages that
1681 will be truncated anyway? Also, should we error out here if
1682 the flush returns error?
1684 rc = filemap_write_and_wait(inode->i_mapping);
1686 cifsInode->write_behind_rc = rc;
1691 if (attrs->ia_valid & ATTR_SIZE) {
1692 rc = cifs_set_file_size(inode, attrs, xid, full_path);
1697 /* skip mode change if it's just for clearing setuid/setgid */
1698 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1699 attrs->ia_valid &= ~ATTR_MODE;
1701 args = kmalloc(sizeof(*args), GFP_KERNEL);
1707 /* set up the struct */
1708 if (attrs->ia_valid & ATTR_MODE)
1709 args->mode = attrs->ia_mode;
1711 args->mode = NO_CHANGE_64;
1713 if (attrs->ia_valid & ATTR_UID)
1714 args->uid = attrs->ia_uid;
1716 args->uid = NO_CHANGE_64;
1718 if (attrs->ia_valid & ATTR_GID)
1719 args->gid = attrs->ia_gid;
1721 args->gid = NO_CHANGE_64;
1723 if (attrs->ia_valid & ATTR_ATIME)
1724 args->atime = cifs_UnixTimeToNT(attrs->ia_atime);
1726 args->atime = NO_CHANGE_64;
1728 if (attrs->ia_valid & ATTR_MTIME)
1729 args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime);
1731 args->mtime = NO_CHANGE_64;
1733 if (attrs->ia_valid & ATTR_CTIME)
1734 args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime);
1736 args->ctime = NO_CHANGE_64;
1739 rc = CIFSSMBUnixSetInfo(xid, pTcon, full_path, args,
1741 cifs_sb->mnt_cifs_flags &
1742 CIFS_MOUNT_MAP_SPECIAL_CHR);
1745 rc = inode_setattr(inode, attrs);
1754 cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
1757 struct inode *inode = direntry->d_inode;
1758 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1759 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1760 char *full_path = NULL;
1763 __u64 mode = NO_CHANGE_64;
1767 cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1768 direntry->d_name.name, attrs->ia_valid));
1770 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1771 /* check if we have permission to change attrs */
1772 rc = inode_change_ok(inode, attrs);
1780 full_path = build_path_from_dentry(direntry);
1781 if (full_path == NULL) {
1786 if ((attrs->ia_valid & ATTR_MTIME) || (attrs->ia_valid & ATTR_SIZE)) {
1788 Flush data before changing file size or changing the last
1789 write time of the file on the server. If the
1790 flush returns error, store it to report later and continue.
1791 BB: This should be smarter. Why bother flushing pages that
1792 will be truncated anyway? Also, should we error out here if
1793 the flush returns error?
1795 rc = filemap_write_and_wait(inode->i_mapping);
1797 cifsInode->write_behind_rc = rc;
1802 if (attrs->ia_valid & ATTR_SIZE) {
1803 rc = cifs_set_file_size(inode, attrs, xid, full_path);
1805 goto cifs_setattr_exit;
1809 * Without unix extensions we can't send ownership changes to the
1810 * server, so silently ignore them. This is consistent with how
1811 * local DOS/Windows filesystems behave (VFAT, NTFS, etc). With
1812 * CIFSACL support + proper Windows to Unix idmapping, we may be
1813 * able to support this in the future.
1815 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID))
1816 attrs->ia_valid &= ~(ATTR_UID | ATTR_GID);
1818 /* skip mode change if it's just for clearing setuid/setgid */
1819 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1820 attrs->ia_valid &= ~ATTR_MODE;
1822 if (attrs->ia_valid & ATTR_MODE) {
1823 cFYI(1, ("Mode changed to 0%o", attrs->ia_mode));
1824 mode = attrs->ia_mode;
1827 if (attrs->ia_valid & ATTR_MODE) {
1829 #ifdef CONFIG_CIFS_EXPERIMENTAL
1830 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
1831 rc = mode_to_acl(inode, full_path, mode);
1834 if (((mode & S_IWUGO) == 0) &&
1835 (cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
1837 dosattr = cifsInode->cifsAttrs | ATTR_READONLY;
1839 /* fix up mode if we're not using dynperm */
1840 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
1841 attrs->ia_mode = inode->i_mode & ~S_IWUGO;
1842 } else if ((mode & S_IWUGO) &&
1843 (cifsInode->cifsAttrs & ATTR_READONLY)) {
1845 dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
1846 /* Attributes of 0 are ignored */
1848 dosattr |= ATTR_NORMAL;
1850 /* reset local inode permissions to normal */
1851 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
1852 attrs->ia_mode &= ~(S_IALLUGO);
1853 if (S_ISDIR(inode->i_mode))
1855 cifs_sb->mnt_dir_mode;
1858 cifs_sb->mnt_file_mode;
1860 } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
1861 /* ignore mode change - ATTR_READONLY hasn't changed */
1862 attrs->ia_valid &= ~ATTR_MODE;
1866 if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) ||
1867 ((attrs->ia_valid & ATTR_MODE) && dosattr)) {
1868 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
1869 /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */
1871 /* Even if error on time set, no sense failing the call if
1872 the server would set the time to a reasonable value anyway,
1873 and this check ensures that we are not being called from
1874 sys_utimes in which case we ought to fail the call back to
1875 the user when the server rejects the call */
1876 if ((rc) && (attrs->ia_valid &
1877 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1881 /* do not need local check to inode_check_ok since the server does
1884 rc = inode_setattr(inode, attrs);
1892 cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1894 struct inode *inode = direntry->d_inode;
1895 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1896 struct cifsTconInfo *pTcon = cifs_sb->tcon;
1898 if (pTcon->unix_ext)
1899 return cifs_setattr_unix(direntry, attrs);
1901 return cifs_setattr_nounix(direntry, attrs);
1903 /* BB: add cifs_setattr_legacy for really old servers */
1907 void cifs_delete_inode(struct inode *inode)
1909 cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1910 /* may have to add back in if and when safe distributed caching of
1911 directories added e.g. via FindNotify */