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);
732 if (rc != -EOPNOTSUPP && rc != -EINVAL)
736 cFYI(1, ("calling SetFileInfo since SetPathInfo for "
737 "times not supported by this server"));
738 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
739 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
740 CREATE_NOT_DIR, &netfid, &oplock,
741 NULL, cifs_sb->local_nls,
742 cifs_sb->mnt_cifs_flags &
743 CIFS_MOUNT_MAP_SPECIAL_CHR);
751 netpid = current->tgid;
754 rc = CIFSSMBSetFileInfo(xid, pTcon, &info_buf, netfid, netpid);
756 cifsInode->cifsAttrs = dosattr;
758 if (open_file == NULL)
759 CIFSSMBClose(xid, pTcon, netfid);
761 atomic_dec(&open_file->wrtPending);
767 * open the given file (if it isn't already), set the DELETE_ON_CLOSE bit
768 * and rename it to a random name that hopefully won't conflict with
772 cifs_rename_pending_delete(char *full_path, struct inode *inode, int xid)
777 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
778 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
779 struct cifsTconInfo *tcon = cifs_sb->tcon;
781 FILE_BASIC_INFO *info_buf;
783 rc = CIFSSMBOpen(xid, tcon, full_path, FILE_OPEN,
784 DELETE|FILE_WRITE_ATTRIBUTES,
785 CREATE_NOT_DIR|CREATE_DELETE_ON_CLOSE,
786 &netfid, &oplock, NULL, cifs_sb->local_nls,
787 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
791 /* set ATTR_HIDDEN and clear ATTR_READONLY */
792 cifsInode = CIFS_I(inode);
793 dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
795 dosattr |= ATTR_NORMAL;
796 dosattr |= ATTR_HIDDEN;
798 info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL);
799 if (info_buf == NULL) {
803 info_buf->Attributes = cpu_to_le32(dosattr);
804 rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid, current->tgid);
809 /* silly-rename the file */
810 CIFSSMBRenameOpenFile(xid, tcon, netfid, NULL, cifs_sb->local_nls,
811 cifs_sb->mnt_cifs_flags &
812 CIFS_MOUNT_MAP_SPECIAL_CHR);
814 /* set DELETE_ON_CLOSE */
815 rc = CIFSSMBSetFileDisposition(xid, tcon, true, netfid, current->tgid);
818 * some samba versions return -ENOENT when we try to set the file
819 * disposition here. Likely a samba bug, but work around it for now
825 CIFSSMBClose(xid, tcon, netfid);
830 int cifs_unlink(struct inode *dir, struct dentry *dentry)
834 char *full_path = NULL;
835 struct inode *inode = dentry->d_inode;
836 struct cifsInodeInfo *cifsInode;
837 struct super_block *sb = dir->i_sb;
838 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
839 struct cifsTconInfo *tcon = cifs_sb->tcon;
843 cFYI(1, ("cifs_unlink, dir=0x%p, dentry=0x%p", dir, dentry));
847 /* Unlink can be called from rename so we can not take the
848 * sb->s_vfs_rename_mutex here */
849 full_path = build_path_from_dentry(dentry);
850 if (full_path == NULL) {
855 if ((tcon->ses->capabilities & CAP_UNIX) &&
856 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
857 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
858 rc = CIFSPOSIXDelFile(xid, tcon, full_path,
859 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
860 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
861 cFYI(1, ("posix del rc %d", rc));
862 if ((rc == 0) || (rc == -ENOENT))
863 goto psx_del_no_retry;
866 rc = CIFSSMBDelFile(xid, tcon, full_path, cifs_sb->local_nls,
867 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
872 } else if (rc == -ENOENT) {
874 } else if (rc == -ETXTBSY) {
875 rc = cifs_rename_pending_delete(full_path, inode, xid);
878 } else if (rc == -EACCES) {
879 /* try only if r/o attribute set in local lookup data? */
880 attrs = kzalloc(sizeof(*attrs), GFP_KERNEL);
886 /* try to reset dos attributes */
887 cifsInode = CIFS_I(inode);
888 dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
890 dosattr |= ATTR_NORMAL;
891 dosattr |= ATTR_HIDDEN;
893 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
897 rc = CIFSSMBDelFile(xid, tcon, full_path, cifs_sb->local_nls,
898 cifs_sb->mnt_cifs_flags &
899 CIFS_MOUNT_MAP_SPECIAL_CHR);
903 } else if (rc == -ETXTBSY) {
904 rc = cifs_rename_pending_delete(full_path, inode, xid);
908 cifsInode->cifsAttrs = dosattr;
912 cifsInode = CIFS_I(inode);
913 cifsInode->time = 0; /* will force revalidate to get info
915 inode->i_ctime = current_fs_time(sb);
917 dir->i_ctime = dir->i_mtime = current_fs_time(sb);
918 cifsInode = CIFS_I(dir);
919 cifsInode->time = 0; /* force revalidate of dir as well */
926 static void posix_fill_in_inode(struct inode *tmp_inode,
927 FILE_UNIX_BASIC_INFO *pData, int isNewInode)
929 struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
931 struct timespec local_mtime;
933 cifsInfo->time = jiffies;
934 atomic_inc(&cifsInfo->inUse);
936 /* save mtime and size */
937 local_mtime = tmp_inode->i_mtime;
938 local_size = tmp_inode->i_size;
940 cifs_unix_info_to_inode(tmp_inode, pData, 1);
941 cifs_set_ops(tmp_inode, false);
943 if (!S_ISREG(tmp_inode->i_mode))
947 * No sense invalidating pages for new inode
948 * since we we have not started caching
949 * readahead file data yet.
954 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
955 (local_size == tmp_inode->i_size)) {
956 cFYI(1, ("inode exists but unchanged"));
958 /* file may have changed on server */
959 cFYI(1, ("invalidate inode, readdir detected change"));
960 invalidate_remote_inode(tmp_inode);
964 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
968 struct cifs_sb_info *cifs_sb;
969 struct cifsTconInfo *pTcon;
970 char *full_path = NULL;
971 struct inode *newinode = NULL;
973 cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
977 cifs_sb = CIFS_SB(inode->i_sb);
978 pTcon = cifs_sb->tcon;
980 full_path = build_path_from_dentry(direntry);
981 if (full_path == NULL) {
986 if ((pTcon->ses->capabilities & CAP_UNIX) &&
987 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
988 le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
990 FILE_UNIX_BASIC_INFO *pInfo =
991 kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
997 mode &= ~current->fs->umask;
998 rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT,
999 mode, NULL /* netfid */, pInfo, &oplock,
1000 full_path, cifs_sb->local_nls,
1001 cifs_sb->mnt_cifs_flags &
1002 CIFS_MOUNT_MAP_SPECIAL_CHR);
1003 if (rc == -EOPNOTSUPP) {
1005 goto mkdir_retry_old;
1007 cFYI(1, ("posix mkdir returned 0x%x", rc));
1010 if (pInfo->Type == cpu_to_le32(-1)) {
1011 /* no return info, go query for it */
1013 goto mkdir_get_info;
1015 /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
1019 direntry->d_op = &cifs_ci_dentry_ops;
1021 direntry->d_op = &cifs_dentry_ops;
1023 newinode = new_inode(inode->i_sb);
1024 if (newinode == NULL) {
1026 goto mkdir_get_info;
1028 /* Is an i_ino of zero legal? */
1029 /* Are there sanity checks we can use to ensure that
1030 the server is really filling in that field? */
1031 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
1033 (unsigned long)pInfo->UniqueId;
1034 } /* note ino incremented to unique num in new_inode */
1035 if (inode->i_sb->s_flags & MS_NOATIME)
1036 newinode->i_flags |= S_NOATIME | S_NOCMTIME;
1037 newinode->i_nlink = 2;
1039 insert_inode_hash(newinode);
1040 d_instantiate(direntry, newinode);
1042 /* we already checked in POSIXCreate whether
1043 frame was long enough */
1044 posix_fill_in_inode(direntry->d_inode,
1045 pInfo, 1 /* NewInode */);
1046 #ifdef CONFIG_CIFS_DEBUG2
1047 cFYI(1, ("instantiated dentry %p %s to inode %p",
1048 direntry, direntry->d_name.name, newinode));
1050 if (newinode->i_nlink != 2)
1051 cFYI(1, ("unexpected number of links %d",
1052 newinode->i_nlink));
1059 /* BB add setting the equivalent of mode via CreateX w/ACLs */
1060 rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
1061 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1063 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
1068 if (pTcon->unix_ext)
1069 rc = cifs_get_inode_info_unix(&newinode, full_path,
1072 rc = cifs_get_inode_info(&newinode, full_path, NULL,
1073 inode->i_sb, xid, NULL);
1076 direntry->d_op = &cifs_ci_dentry_ops;
1078 direntry->d_op = &cifs_dentry_ops;
1079 d_instantiate(direntry, newinode);
1080 /* setting nlink not necessary except in cases where we
1081 * failed to get it from the server or was set bogus */
1082 if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
1083 direntry->d_inode->i_nlink = 2;
1085 mode &= ~current->fs->umask;
1086 /* must turn on setgid bit if parent dir has it */
1087 if (inode->i_mode & S_ISGID)
1090 if (pTcon->unix_ext) {
1091 struct cifs_unix_set_info_args args = {
1093 .ctime = NO_CHANGE_64,
1094 .atime = NO_CHANGE_64,
1095 .mtime = NO_CHANGE_64,
1098 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1099 args.uid = (__u64)current->fsuid;
1100 if (inode->i_mode & S_ISGID)
1101 args.gid = (__u64)inode->i_gid;
1103 args.gid = (__u64)current->fsgid;
1105 args.uid = NO_CHANGE_64;
1106 args.gid = NO_CHANGE_64;
1108 CIFSSMBUnixSetInfo(xid, pTcon, full_path, &args,
1110 cifs_sb->mnt_cifs_flags &
1111 CIFS_MOUNT_MAP_SPECIAL_CHR);
1113 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
1114 (mode & S_IWUGO) == 0) {
1115 FILE_BASIC_INFO pInfo;
1116 memset(&pInfo, 0, sizeof(pInfo));
1117 pInfo.Attributes = cpu_to_le32(ATTR_READONLY);
1118 CIFSSMBSetPathInfo(xid, pTcon, full_path,
1119 &pInfo, cifs_sb->local_nls,
1120 cifs_sb->mnt_cifs_flags &
1121 CIFS_MOUNT_MAP_SPECIAL_CHR);
1123 if (direntry->d_inode) {
1124 if (cifs_sb->mnt_cifs_flags &
1126 direntry->d_inode->i_mode =
1129 if (cifs_sb->mnt_cifs_flags &
1130 CIFS_MOUNT_SET_UID) {
1131 direntry->d_inode->i_uid =
1133 if (inode->i_mode & S_ISGID)
1134 direntry->d_inode->i_gid =
1137 direntry->d_inode->i_gid =
1149 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1153 struct cifs_sb_info *cifs_sb;
1154 struct cifsTconInfo *pTcon;
1155 char *full_path = NULL;
1156 struct cifsInodeInfo *cifsInode;
1158 cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
1162 cifs_sb = CIFS_SB(inode->i_sb);
1163 pTcon = cifs_sb->tcon;
1165 full_path = build_path_from_dentry(direntry);
1166 if (full_path == NULL) {
1171 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1172 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1176 spin_lock(&direntry->d_inode->i_lock);
1177 i_size_write(direntry->d_inode, 0);
1178 clear_nlink(direntry->d_inode);
1179 spin_unlock(&direntry->d_inode->i_lock);
1182 cifsInode = CIFS_I(direntry->d_inode);
1183 cifsInode->time = 0; /* force revalidate to go get info when
1185 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1186 current_fs_time(inode->i_sb);
1194 cifs_do_rename(int xid, struct dentry *from_dentry, const char *fromPath,
1195 struct dentry *to_dentry, const char *toPath)
1197 struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb);
1198 struct cifsTconInfo *pTcon = cifs_sb->tcon;
1202 /* try path-based rename first */
1203 rc = CIFSSMBRename(xid, pTcon, fromPath, toPath, cifs_sb->local_nls,
1204 cifs_sb->mnt_cifs_flags &
1205 CIFS_MOUNT_MAP_SPECIAL_CHR);
1208 * don't bother with rename by filehandle unless file is busy and
1209 * source Note that cross directory moves do not work with
1210 * rename by filehandle to various Windows servers.
1212 if (rc == 0 || rc != -ETXTBSY)
1215 /* open the file to be renamed -- we need DELETE perms */
1216 rc = CIFSSMBOpen(xid, pTcon, fromPath, FILE_OPEN, DELETE,
1217 CREATE_NOT_DIR, &srcfid, &oplock, NULL,
1218 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
1219 CIFS_MOUNT_MAP_SPECIAL_CHR);
1222 rc = CIFSSMBRenameOpenFile(xid, pTcon, srcfid,
1223 (const char *) to_dentry->d_name.name,
1224 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
1225 CIFS_MOUNT_MAP_SPECIAL_CHR);
1227 CIFSSMBClose(xid, pTcon, srcfid);
1233 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
1234 struct inode *target_inode, struct dentry *target_direntry)
1236 char *fromName = NULL;
1237 char *toName = NULL;
1238 struct cifs_sb_info *cifs_sb_source;
1239 struct cifs_sb_info *cifs_sb_target;
1240 struct cifsTconInfo *pTcon;
1241 FILE_UNIX_BASIC_INFO *info_buf_source = NULL;
1242 FILE_UNIX_BASIC_INFO *info_buf_target;
1246 cifs_sb_target = CIFS_SB(target_inode->i_sb);
1247 cifs_sb_source = CIFS_SB(source_inode->i_sb);
1248 pTcon = cifs_sb_source->tcon;
1253 * BB: this might be allowed if same server, but different share.
1254 * Consider adding support for this
1256 if (pTcon != cifs_sb_target->tcon) {
1258 goto cifs_rename_exit;
1262 * we already have the rename sem so we do not need to
1263 * grab it again here to protect the path integrity
1265 fromName = build_path_from_dentry(source_direntry);
1266 if (fromName == NULL) {
1268 goto cifs_rename_exit;
1271 toName = build_path_from_dentry(target_direntry);
1272 if (toName == NULL) {
1274 goto cifs_rename_exit;
1277 rc = cifs_do_rename(xid, source_direntry, fromName,
1278 target_direntry, toName);
1280 if (rc == -EEXIST) {
1281 if (pTcon->unix_ext) {
1283 * Are src and dst hardlinks of same inode? We can
1284 * only tell with unix extensions enabled
1287 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO),
1289 if (info_buf_source == NULL)
1292 info_buf_target = info_buf_source + 1;
1293 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
1295 cifs_sb_source->local_nls,
1296 cifs_sb_source->mnt_cifs_flags &
1297 CIFS_MOUNT_MAP_SPECIAL_CHR);
1301 rc = CIFSSMBUnixQPathInfo(xid, pTcon,
1302 toName, info_buf_target,
1303 cifs_sb_target->local_nls,
1304 /* remap based on source sb */
1305 cifs_sb_source->mnt_cifs_flags &
1306 CIFS_MOUNT_MAP_SPECIAL_CHR);
1308 if (rc == 0 && (info_buf_source->UniqueId ==
1309 info_buf_target->UniqueId))
1310 /* same file, POSIX says that this is a noop */
1311 goto cifs_rename_exit;
1312 } /* else ... BB we could add the same check for Windows by
1313 checking the UniqueId via FILE_INTERNAL_INFO */
1316 * we either can not tell the files are hardlinked (as with
1317 * Windows servers) or files are not hardlinked. Delete the
1318 * target manually before renaming to follow POSIX rather than
1321 cifs_unlink(target_inode, target_direntry);
1322 rc = cifs_do_rename(xid, source_direntry, fromName,
1323 target_direntry, toName);
1327 kfree(info_buf_source);
1334 int cifs_revalidate(struct dentry *direntry)
1337 int rc = 0, wbrc = 0;
1339 struct cifs_sb_info *cifs_sb;
1340 struct cifsInodeInfo *cifsInode;
1342 struct timespec local_mtime;
1343 bool invalidate_inode = false;
1345 if (direntry->d_inode == NULL)
1348 cifsInode = CIFS_I(direntry->d_inode);
1350 if (cifsInode == NULL)
1353 /* no sense revalidating inode info on file that no one can write */
1354 if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
1359 cifs_sb = CIFS_SB(direntry->d_sb);
1361 /* can not safely grab the rename sem here if rename calls revalidate
1362 since that would deadlock */
1363 full_path = build_path_from_dentry(direntry);
1364 if (full_path == NULL) {
1368 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1369 "jiffies %ld", full_path, direntry->d_inode,
1370 direntry->d_inode->i_count.counter, direntry,
1371 direntry->d_time, jiffies));
1373 if (cifsInode->time == 0) {
1374 /* was set to zero previously to force revalidate */
1375 } else if (time_before(jiffies, cifsInode->time + HZ) &&
1376 lookupCacheEnabled) {
1377 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1378 (direntry->d_inode->i_nlink == 1)) {
1383 cFYI(1, ("Have to revalidate file due to hardlinks"));
1387 /* save mtime and size */
1388 local_mtime = direntry->d_inode->i_mtime;
1389 local_size = direntry->d_inode->i_size;
1391 if (cifs_sb->tcon->unix_ext) {
1392 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1393 direntry->d_sb, xid);
1395 cFYI(1, ("error on getting revalidate info %d", rc));
1396 /* if (rc != -ENOENT)
1397 rc = 0; */ /* BB should we cache info on
1401 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1402 direntry->d_sb, xid, NULL);
1404 cFYI(1, ("error on getting revalidate info %d", rc));
1405 /* if (rc != -ENOENT)
1406 rc = 0; */ /* BB should we cache info on
1410 /* should we remap certain errors, access denied?, to zero */
1412 /* if not oplocked, we invalidate inode pages if mtime or file size
1413 had changed on server */
1415 if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) &&
1416 (local_size == direntry->d_inode->i_size)) {
1417 cFYI(1, ("cifs_revalidate - inode unchanged"));
1419 /* file may have changed on server */
1420 if (cifsInode->clientCanCacheRead) {
1421 /* no need to invalidate inode pages since we were the
1422 only ones who could have modified the file and the
1423 server copy is staler than ours */
1425 invalidate_inode = true;
1429 /* can not grab this sem since kernel filesys locking documentation
1430 indicates i_mutex may be taken by the kernel on lookup and rename
1431 which could deadlock if we grab the i_mutex here as well */
1432 /* mutex_lock(&direntry->d_inode->i_mutex);*/
1433 /* need to write out dirty pages here */
1434 if (direntry->d_inode->i_mapping) {
1435 /* do we need to lock inode until after invalidate completes
1437 wbrc = filemap_fdatawrite(direntry->d_inode->i_mapping);
1439 CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1441 if (invalidate_inode) {
1442 /* shrink_dcache not necessary now that cifs dentry ops
1443 are exported for negative dentries */
1444 /* if (S_ISDIR(direntry->d_inode->i_mode))
1445 shrink_dcache_parent(direntry); */
1446 if (S_ISREG(direntry->d_inode->i_mode)) {
1447 if (direntry->d_inode->i_mapping) {
1448 wbrc = filemap_fdatawait(direntry->d_inode->i_mapping);
1450 CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1452 /* may eventually have to do this for open files too */
1453 if (list_empty(&(cifsInode->openFileList))) {
1454 /* changed on server - flush read ahead pages */
1455 cFYI(1, ("Invalidating read ahead data on "
1457 invalidate_remote_inode(direntry->d_inode);
1461 /* mutex_unlock(&direntry->d_inode->i_mutex); */
1468 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1471 int err = cifs_revalidate(dentry);
1473 generic_fillattr(dentry->d_inode, stat);
1474 stat->blksize = CIFS_MAX_MSGSIZE;
1479 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1481 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1482 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1486 page = grab_cache_page(mapping, index);
1490 zero_user_segment(page, offset, PAGE_CACHE_SIZE);
1492 page_cache_release(page);
1496 static int cifs_vmtruncate(struct inode *inode, loff_t offset)
1498 struct address_space *mapping = inode->i_mapping;
1499 unsigned long limit;
1501 spin_lock(&inode->i_lock);
1502 if (inode->i_size < offset)
1505 * truncation of in-use swapfiles is disallowed - it would cause
1506 * subsequent swapout to scribble on the now-freed blocks.
1508 if (IS_SWAPFILE(inode)) {
1509 spin_unlock(&inode->i_lock);
1512 i_size_write(inode, offset);
1513 spin_unlock(&inode->i_lock);
1515 * unmap_mapping_range is called twice, first simply for efficiency
1516 * so that truncate_inode_pages does fewer single-page unmaps. However
1517 * after this first call, and before truncate_inode_pages finishes,
1518 * it is possible for private pages to be COWed, which remain after
1519 * truncate_inode_pages finishes, hence the second unmap_mapping_range
1520 * call must be made for correctness.
1522 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1523 truncate_inode_pages(mapping, offset);
1524 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1528 limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
1529 if (limit != RLIM_INFINITY && offset > limit) {
1530 spin_unlock(&inode->i_lock);
1533 if (offset > inode->i_sb->s_maxbytes) {
1534 spin_unlock(&inode->i_lock);
1537 i_size_write(inode, offset);
1538 spin_unlock(&inode->i_lock);
1540 if (inode->i_op && inode->i_op->truncate)
1541 inode->i_op->truncate(inode);
1544 send_sig(SIGXFSZ, current, 0);
1552 cifs_set_file_size(struct inode *inode, struct iattr *attrs,
1553 int xid, char *full_path)
1556 struct cifsFileInfo *open_file;
1557 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1558 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1559 struct cifsTconInfo *pTcon = cifs_sb->tcon;
1562 * To avoid spurious oplock breaks from server, in the case of
1563 * inodes that we already have open, avoid doing path based
1564 * setting of file size if we can do it by handle.
1565 * This keeps our caching token (oplock) and avoids timeouts
1566 * when the local oplock break takes longer to flush
1567 * writebehind data than the SMB timeout for the SetPathInfo
1568 * request would allow
1570 open_file = find_writable_file(cifsInode);
1572 __u16 nfid = open_file->netfid;
1573 __u32 npid = open_file->pid;
1574 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size, nfid,
1576 atomic_dec(&open_file->wrtPending);
1577 cFYI(1, ("SetFSize for attrs rc = %d", rc));
1578 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1579 unsigned int bytes_written;
1580 rc = CIFSSMBWrite(xid, pTcon, nfid, 0, attrs->ia_size,
1581 &bytes_written, NULL, NULL, 1);
1582 cFYI(1, ("Wrt seteof rc %d", rc));
1588 /* Set file size by pathname rather than by handle
1589 either because no valid, writeable file handle for
1590 it was found or because there was an error setting
1592 rc = CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size,
1593 false, cifs_sb->local_nls,
1594 cifs_sb->mnt_cifs_flags &
1595 CIFS_MOUNT_MAP_SPECIAL_CHR);
1596 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1597 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1601 rc = SMBLegacyOpen(xid, pTcon, full_path,
1602 FILE_OPEN, GENERIC_WRITE,
1603 CREATE_NOT_DIR, &netfid, &oplock, NULL,
1605 cifs_sb->mnt_cifs_flags &
1606 CIFS_MOUNT_MAP_SPECIAL_CHR);
1608 unsigned int bytes_written;
1609 rc = CIFSSMBWrite(xid, pTcon, netfid, 0,
1611 &bytes_written, NULL,
1613 cFYI(1, ("wrt seteof rc %d", rc));
1614 CIFSSMBClose(xid, pTcon, netfid);
1620 rc = cifs_vmtruncate(inode, attrs->ia_size);
1621 cifs_truncate_page(inode->i_mapping, inode->i_size);
1628 cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
1632 char *full_path = NULL;
1633 struct inode *inode = direntry->d_inode;
1634 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1635 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1636 struct cifsTconInfo *pTcon = cifs_sb->tcon;
1637 struct cifs_unix_set_info_args *args = NULL;
1639 cFYI(1, ("setattr_unix on file %s attrs->ia_valid=0x%x",
1640 direntry->d_name.name, attrs->ia_valid));
1644 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1645 /* check if we have permission to change attrs */
1646 rc = inode_change_ok(inode, attrs);
1653 full_path = build_path_from_dentry(direntry);
1654 if (full_path == NULL) {
1659 if ((attrs->ia_valid & ATTR_MTIME) || (attrs->ia_valid & ATTR_SIZE)) {
1661 Flush data before changing file size or changing the last
1662 write time of the file on the server. If the
1663 flush returns error, store it to report later and continue.
1664 BB: This should be smarter. Why bother flushing pages that
1665 will be truncated anyway? Also, should we error out here if
1666 the flush returns error?
1668 rc = filemap_write_and_wait(inode->i_mapping);
1670 cifsInode->write_behind_rc = rc;
1675 if (attrs->ia_valid & ATTR_SIZE) {
1676 rc = cifs_set_file_size(inode, attrs, xid, full_path);
1681 /* skip mode change if it's just for clearing setuid/setgid */
1682 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1683 attrs->ia_valid &= ~ATTR_MODE;
1685 args = kmalloc(sizeof(*args), GFP_KERNEL);
1691 /* set up the struct */
1692 if (attrs->ia_valid & ATTR_MODE)
1693 args->mode = attrs->ia_mode;
1695 args->mode = NO_CHANGE_64;
1697 if (attrs->ia_valid & ATTR_UID)
1698 args->uid = attrs->ia_uid;
1700 args->uid = NO_CHANGE_64;
1702 if (attrs->ia_valid & ATTR_GID)
1703 args->gid = attrs->ia_gid;
1705 args->gid = NO_CHANGE_64;
1707 if (attrs->ia_valid & ATTR_ATIME)
1708 args->atime = cifs_UnixTimeToNT(attrs->ia_atime);
1710 args->atime = NO_CHANGE_64;
1712 if (attrs->ia_valid & ATTR_MTIME)
1713 args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime);
1715 args->mtime = NO_CHANGE_64;
1717 if (attrs->ia_valid & ATTR_CTIME)
1718 args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime);
1720 args->ctime = NO_CHANGE_64;
1723 rc = CIFSSMBUnixSetInfo(xid, pTcon, full_path, args,
1725 cifs_sb->mnt_cifs_flags &
1726 CIFS_MOUNT_MAP_SPECIAL_CHR);
1729 rc = inode_setattr(inode, attrs);
1738 cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
1741 struct inode *inode = direntry->d_inode;
1742 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1743 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1744 char *full_path = NULL;
1747 __u64 mode = NO_CHANGE_64;
1751 cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1752 direntry->d_name.name, attrs->ia_valid));
1754 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1755 /* check if we have permission to change attrs */
1756 rc = inode_change_ok(inode, attrs);
1764 full_path = build_path_from_dentry(direntry);
1765 if (full_path == NULL) {
1770 if ((attrs->ia_valid & ATTR_MTIME) || (attrs->ia_valid & ATTR_SIZE)) {
1772 Flush data before changing file size or changing the last
1773 write time of the file on the server. If the
1774 flush returns error, store it to report later and continue.
1775 BB: This should be smarter. Why bother flushing pages that
1776 will be truncated anyway? Also, should we error out here if
1777 the flush returns error?
1779 rc = filemap_write_and_wait(inode->i_mapping);
1781 cifsInode->write_behind_rc = rc;
1786 if (attrs->ia_valid & ATTR_SIZE) {
1787 rc = cifs_set_file_size(inode, attrs, xid, full_path);
1789 goto cifs_setattr_exit;
1793 * Without unix extensions we can't send ownership changes to the
1794 * server, so silently ignore them. This is consistent with how
1795 * local DOS/Windows filesystems behave (VFAT, NTFS, etc). With
1796 * CIFSACL support + proper Windows to Unix idmapping, we may be
1797 * able to support this in the future.
1799 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID))
1800 attrs->ia_valid &= ~(ATTR_UID | ATTR_GID);
1802 /* skip mode change if it's just for clearing setuid/setgid */
1803 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1804 attrs->ia_valid &= ~ATTR_MODE;
1806 if (attrs->ia_valid & ATTR_MODE) {
1807 cFYI(1, ("Mode changed to 0%o", attrs->ia_mode));
1808 mode = attrs->ia_mode;
1811 if (attrs->ia_valid & ATTR_MODE) {
1813 #ifdef CONFIG_CIFS_EXPERIMENTAL
1814 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
1815 rc = mode_to_acl(inode, full_path, mode);
1818 if (((mode & S_IWUGO) == 0) &&
1819 (cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
1821 dosattr = cifsInode->cifsAttrs | ATTR_READONLY;
1823 /* fix up mode if we're not using dynperm */
1824 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
1825 attrs->ia_mode = inode->i_mode & ~S_IWUGO;
1826 } else if ((mode & S_IWUGO) &&
1827 (cifsInode->cifsAttrs & ATTR_READONLY)) {
1829 dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
1830 /* Attributes of 0 are ignored */
1832 dosattr |= ATTR_NORMAL;
1834 /* reset local inode permissions to normal */
1835 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
1836 attrs->ia_mode &= ~(S_IALLUGO);
1837 if (S_ISDIR(inode->i_mode))
1839 cifs_sb->mnt_dir_mode;
1842 cifs_sb->mnt_file_mode;
1844 } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
1845 /* ignore mode change - ATTR_READONLY hasn't changed */
1846 attrs->ia_valid &= ~ATTR_MODE;
1850 if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) ||
1851 ((attrs->ia_valid & ATTR_MODE) && dosattr)) {
1852 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
1853 /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */
1855 /* Even if error on time set, no sense failing the call if
1856 the server would set the time to a reasonable value anyway,
1857 and this check ensures that we are not being called from
1858 sys_utimes in which case we ought to fail the call back to
1859 the user when the server rejects the call */
1860 if ((rc) && (attrs->ia_valid &
1861 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1865 /* do not need local check to inode_check_ok since the server does
1868 rc = inode_setattr(inode, attrs);
1876 cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1878 struct inode *inode = direntry->d_inode;
1879 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1880 struct cifsTconInfo *pTcon = cifs_sb->tcon;
1882 if (pTcon->unix_ext)
1883 return cifs_setattr_unix(direntry, attrs);
1885 return cifs_setattr_nounix(direntry, attrs);
1887 /* BB: add cifs_setattr_legacy for really old servers */
1891 void cifs_delete_inode(struct inode *inode)
1893 cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1894 /* may have to add back in if and when safe distributed caching of
1895 directories added e.g. via FindNotify */