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,
788 CREATE_NOT_DIR|CREATE_DELETE_ON_CLOSE,
789 &netfid, &oplock, NULL, cifs_sb->local_nls,
790 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
794 /* set ATTR_HIDDEN and clear ATTR_READONLY */
795 cifsInode = CIFS_I(inode);
796 dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
798 dosattr |= ATTR_NORMAL;
799 dosattr |= ATTR_HIDDEN;
801 info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL);
802 if (info_buf == NULL) {
806 info_buf->Attributes = cpu_to_le32(dosattr);
807 rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid, current->tgid);
811 cifsInode->cifsAttrs = dosattr;
813 /* silly-rename the file */
814 CIFSSMBRenameOpenFile(xid, tcon, netfid, NULL, cifs_sb->local_nls,
815 cifs_sb->mnt_cifs_flags &
816 CIFS_MOUNT_MAP_SPECIAL_CHR);
818 /* set DELETE_ON_CLOSE */
819 rc = CIFSSMBSetFileDisposition(xid, tcon, true, netfid, current->tgid);
822 * some samba versions return -ENOENT when we try to set the file
823 * disposition here. Likely a samba bug, but work around it for now
829 CIFSSMBClose(xid, tcon, netfid);
834 int cifs_unlink(struct inode *dir, struct dentry *dentry)
838 char *full_path = NULL;
839 struct inode *inode = dentry->d_inode;
840 struct cifsInodeInfo *cifsInode;
841 struct super_block *sb = dir->i_sb;
842 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
843 struct cifsTconInfo *tcon = cifs_sb->tcon;
847 cFYI(1, ("cifs_unlink, dir=0x%p, dentry=0x%p", dir, dentry));
851 /* Unlink can be called from rename so we can not take the
852 * sb->s_vfs_rename_mutex here */
853 full_path = build_path_from_dentry(dentry);
854 if (full_path == NULL) {
859 if ((tcon->ses->capabilities & CAP_UNIX) &&
860 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
861 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
862 rc = CIFSPOSIXDelFile(xid, tcon, full_path,
863 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
864 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
865 cFYI(1, ("posix del rc %d", rc));
866 if ((rc == 0) || (rc == -ENOENT))
867 goto psx_del_no_retry;
870 rc = CIFSSMBDelFile(xid, tcon, full_path, cifs_sb->local_nls,
871 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
876 } else if (rc == -ENOENT) {
878 } else if (rc == -ETXTBSY) {
879 rc = cifs_rename_pending_delete(full_path, inode, xid);
882 } else if (rc == -EACCES) {
883 /* try only if r/o attribute set in local lookup data? */
884 attrs = kzalloc(sizeof(*attrs), GFP_KERNEL);
890 /* try to reset dos attributes */
891 cifsInode = CIFS_I(inode);
892 dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
894 dosattr |= ATTR_NORMAL;
895 dosattr |= ATTR_HIDDEN;
897 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
901 rc = CIFSSMBDelFile(xid, tcon, full_path, cifs_sb->local_nls,
902 cifs_sb->mnt_cifs_flags &
903 CIFS_MOUNT_MAP_SPECIAL_CHR);
907 } else if (rc == -ETXTBSY) {
908 rc = cifs_rename_pending_delete(full_path, inode, xid);
915 cifsInode = CIFS_I(inode);
916 cifsInode->time = 0; /* will force revalidate to get info
918 inode->i_ctime = current_fs_time(sb);
920 dir->i_ctime = dir->i_mtime = current_fs_time(sb);
921 cifsInode = CIFS_I(dir);
922 cifsInode->time = 0; /* force revalidate of dir as well */
929 static void posix_fill_in_inode(struct inode *tmp_inode,
930 FILE_UNIX_BASIC_INFO *pData, int isNewInode)
932 struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
934 struct timespec local_mtime;
936 cifsInfo->time = jiffies;
937 atomic_inc(&cifsInfo->inUse);
939 /* save mtime and size */
940 local_mtime = tmp_inode->i_mtime;
941 local_size = tmp_inode->i_size;
943 cifs_unix_info_to_inode(tmp_inode, pData, 1);
944 cifs_set_ops(tmp_inode, false);
946 if (!S_ISREG(tmp_inode->i_mode))
950 * No sense invalidating pages for new inode
951 * since we we have not started caching
952 * readahead file data yet.
957 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
958 (local_size == tmp_inode->i_size)) {
959 cFYI(1, ("inode exists but unchanged"));
961 /* file may have changed on server */
962 cFYI(1, ("invalidate inode, readdir detected change"));
963 invalidate_remote_inode(tmp_inode);
967 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
971 struct cifs_sb_info *cifs_sb;
972 struct cifsTconInfo *pTcon;
973 char *full_path = NULL;
974 struct inode *newinode = NULL;
976 cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
980 cifs_sb = CIFS_SB(inode->i_sb);
981 pTcon = cifs_sb->tcon;
983 full_path = build_path_from_dentry(direntry);
984 if (full_path == NULL) {
989 if ((pTcon->ses->capabilities & CAP_UNIX) &&
990 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
991 le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
993 FILE_UNIX_BASIC_INFO *pInfo =
994 kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1000 mode &= ~current->fs->umask;
1001 rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT,
1002 mode, NULL /* netfid */, pInfo, &oplock,
1003 full_path, cifs_sb->local_nls,
1004 cifs_sb->mnt_cifs_flags &
1005 CIFS_MOUNT_MAP_SPECIAL_CHR);
1006 if (rc == -EOPNOTSUPP) {
1008 goto mkdir_retry_old;
1010 cFYI(1, ("posix mkdir returned 0x%x", rc));
1013 if (pInfo->Type == cpu_to_le32(-1)) {
1014 /* no return info, go query for it */
1016 goto mkdir_get_info;
1018 /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
1022 direntry->d_op = &cifs_ci_dentry_ops;
1024 direntry->d_op = &cifs_dentry_ops;
1026 newinode = new_inode(inode->i_sb);
1027 if (newinode == NULL) {
1029 goto mkdir_get_info;
1032 /* Is an i_ino of zero legal? */
1033 /* Are there sanity checks we can use to ensure that
1034 the server is really filling in that field? */
1035 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
1037 (unsigned long)pInfo->UniqueId;
1038 } /* note ino incremented to unique num in new_inode */
1039 if (inode->i_sb->s_flags & MS_NOATIME)
1040 newinode->i_flags |= S_NOATIME | S_NOCMTIME;
1041 newinode->i_nlink = 2;
1043 insert_inode_hash(newinode);
1044 d_instantiate(direntry, newinode);
1046 /* we already checked in POSIXCreate whether
1047 frame was long enough */
1048 posix_fill_in_inode(direntry->d_inode,
1049 pInfo, 1 /* NewInode */);
1050 #ifdef CONFIG_CIFS_DEBUG2
1051 cFYI(1, ("instantiated dentry %p %s to inode %p",
1052 direntry, direntry->d_name.name, newinode));
1054 if (newinode->i_nlink != 2)
1055 cFYI(1, ("unexpected number of links %d",
1056 newinode->i_nlink));
1063 /* BB add setting the equivalent of mode via CreateX w/ACLs */
1064 rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
1065 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1067 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
1072 if (pTcon->unix_ext)
1073 rc = cifs_get_inode_info_unix(&newinode, full_path,
1076 rc = cifs_get_inode_info(&newinode, full_path, NULL,
1077 inode->i_sb, xid, NULL);
1080 direntry->d_op = &cifs_ci_dentry_ops;
1082 direntry->d_op = &cifs_dentry_ops;
1083 d_instantiate(direntry, newinode);
1084 /* setting nlink not necessary except in cases where we
1085 * failed to get it from the server or was set bogus */
1086 if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
1087 direntry->d_inode->i_nlink = 2;
1089 mode &= ~current->fs->umask;
1090 /* must turn on setgid bit if parent dir has it */
1091 if (inode->i_mode & S_ISGID)
1094 if (pTcon->unix_ext) {
1095 struct cifs_unix_set_info_args args = {
1097 .ctime = NO_CHANGE_64,
1098 .atime = NO_CHANGE_64,
1099 .mtime = NO_CHANGE_64,
1102 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1103 args.uid = (__u64)current->fsuid;
1104 if (inode->i_mode & S_ISGID)
1105 args.gid = (__u64)inode->i_gid;
1107 args.gid = (__u64)current->fsgid;
1109 args.uid = NO_CHANGE_64;
1110 args.gid = NO_CHANGE_64;
1112 CIFSSMBUnixSetInfo(xid, pTcon, full_path, &args,
1114 cifs_sb->mnt_cifs_flags &
1115 CIFS_MOUNT_MAP_SPECIAL_CHR);
1117 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
1118 (mode & S_IWUGO) == 0) {
1119 FILE_BASIC_INFO pInfo;
1120 struct cifsInodeInfo *cifsInode;
1123 memset(&pInfo, 0, sizeof(pInfo));
1124 cifsInode = CIFS_I(newinode);
1125 dosattrs = cifsInode->cifsAttrs|ATTR_READONLY;
1126 pInfo.Attributes = cpu_to_le32(dosattrs);
1127 tmprc = CIFSSMBSetPathInfo(xid, pTcon,
1130 cifs_sb->mnt_cifs_flags &
1131 CIFS_MOUNT_MAP_SPECIAL_CHR);
1133 cifsInode->cifsAttrs = dosattrs;
1135 if (direntry->d_inode) {
1136 if (cifs_sb->mnt_cifs_flags &
1138 direntry->d_inode->i_mode =
1141 if (cifs_sb->mnt_cifs_flags &
1142 CIFS_MOUNT_SET_UID) {
1143 direntry->d_inode->i_uid =
1145 if (inode->i_mode & S_ISGID)
1146 direntry->d_inode->i_gid =
1149 direntry->d_inode->i_gid =
1161 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1165 struct cifs_sb_info *cifs_sb;
1166 struct cifsTconInfo *pTcon;
1167 char *full_path = NULL;
1168 struct cifsInodeInfo *cifsInode;
1170 cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
1174 cifs_sb = CIFS_SB(inode->i_sb);
1175 pTcon = cifs_sb->tcon;
1177 full_path = build_path_from_dentry(direntry);
1178 if (full_path == NULL) {
1183 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1184 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1188 spin_lock(&direntry->d_inode->i_lock);
1189 i_size_write(direntry->d_inode, 0);
1190 clear_nlink(direntry->d_inode);
1191 spin_unlock(&direntry->d_inode->i_lock);
1194 cifsInode = CIFS_I(direntry->d_inode);
1195 cifsInode->time = 0; /* force revalidate to go get info when
1197 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1198 current_fs_time(inode->i_sb);
1206 cifs_do_rename(int xid, struct dentry *from_dentry, const char *fromPath,
1207 struct dentry *to_dentry, const char *toPath)
1209 struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb);
1210 struct cifsTconInfo *pTcon = cifs_sb->tcon;
1214 /* try path-based rename first */
1215 rc = CIFSSMBRename(xid, pTcon, fromPath, toPath, cifs_sb->local_nls,
1216 cifs_sb->mnt_cifs_flags &
1217 CIFS_MOUNT_MAP_SPECIAL_CHR);
1220 * don't bother with rename by filehandle unless file is busy and
1221 * source Note that cross directory moves do not work with
1222 * rename by filehandle to various Windows servers.
1224 if (rc == 0 || rc != -ETXTBSY)
1227 /* open the file to be renamed -- we need DELETE perms */
1228 rc = CIFSSMBOpen(xid, pTcon, fromPath, FILE_OPEN, DELETE,
1229 CREATE_NOT_DIR, &srcfid, &oplock, NULL,
1230 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
1231 CIFS_MOUNT_MAP_SPECIAL_CHR);
1234 rc = CIFSSMBRenameOpenFile(xid, pTcon, srcfid,
1235 (const char *) to_dentry->d_name.name,
1236 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
1237 CIFS_MOUNT_MAP_SPECIAL_CHR);
1239 CIFSSMBClose(xid, pTcon, srcfid);
1245 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
1246 struct inode *target_inode, struct dentry *target_direntry)
1248 char *fromName = NULL;
1249 char *toName = NULL;
1250 struct cifs_sb_info *cifs_sb_source;
1251 struct cifs_sb_info *cifs_sb_target;
1252 struct cifsTconInfo *pTcon;
1253 FILE_UNIX_BASIC_INFO *info_buf_source = NULL;
1254 FILE_UNIX_BASIC_INFO *info_buf_target;
1258 cifs_sb_target = CIFS_SB(target_inode->i_sb);
1259 cifs_sb_source = CIFS_SB(source_inode->i_sb);
1260 pTcon = cifs_sb_source->tcon;
1265 * BB: this might be allowed if same server, but different share.
1266 * Consider adding support for this
1268 if (pTcon != cifs_sb_target->tcon) {
1270 goto cifs_rename_exit;
1274 * we already have the rename sem so we do not need to
1275 * grab it again here to protect the path integrity
1277 fromName = build_path_from_dentry(source_direntry);
1278 if (fromName == NULL) {
1280 goto cifs_rename_exit;
1283 toName = build_path_from_dentry(target_direntry);
1284 if (toName == NULL) {
1286 goto cifs_rename_exit;
1289 rc = cifs_do_rename(xid, source_direntry, fromName,
1290 target_direntry, toName);
1292 if (rc == -EEXIST) {
1293 if (pTcon->unix_ext) {
1295 * Are src and dst hardlinks of same inode? We can
1296 * only tell with unix extensions enabled
1299 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO),
1301 if (info_buf_source == NULL)
1304 info_buf_target = info_buf_source + 1;
1305 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
1307 cifs_sb_source->local_nls,
1308 cifs_sb_source->mnt_cifs_flags &
1309 CIFS_MOUNT_MAP_SPECIAL_CHR);
1313 rc = CIFSSMBUnixQPathInfo(xid, pTcon,
1314 toName, info_buf_target,
1315 cifs_sb_target->local_nls,
1316 /* remap based on source sb */
1317 cifs_sb_source->mnt_cifs_flags &
1318 CIFS_MOUNT_MAP_SPECIAL_CHR);
1320 if (rc == 0 && (info_buf_source->UniqueId ==
1321 info_buf_target->UniqueId))
1322 /* same file, POSIX says that this is a noop */
1323 goto cifs_rename_exit;
1324 } /* else ... BB we could add the same check for Windows by
1325 checking the UniqueId via FILE_INTERNAL_INFO */
1328 * we either can not tell the files are hardlinked (as with
1329 * Windows servers) or files are not hardlinked. Delete the
1330 * target manually before renaming to follow POSIX rather than
1333 cifs_unlink(target_inode, target_direntry);
1334 rc = cifs_do_rename(xid, source_direntry, fromName,
1335 target_direntry, toName);
1339 kfree(info_buf_source);
1346 int cifs_revalidate(struct dentry *direntry)
1349 int rc = 0, wbrc = 0;
1351 struct cifs_sb_info *cifs_sb;
1352 struct cifsInodeInfo *cifsInode;
1354 struct timespec local_mtime;
1355 bool invalidate_inode = false;
1357 if (direntry->d_inode == NULL)
1360 cifsInode = CIFS_I(direntry->d_inode);
1362 if (cifsInode == NULL)
1365 /* no sense revalidating inode info on file that no one can write */
1366 if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
1371 cifs_sb = CIFS_SB(direntry->d_sb);
1373 /* can not safely grab the rename sem here if rename calls revalidate
1374 since that would deadlock */
1375 full_path = build_path_from_dentry(direntry);
1376 if (full_path == NULL) {
1380 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1381 "jiffies %ld", full_path, direntry->d_inode,
1382 direntry->d_inode->i_count.counter, direntry,
1383 direntry->d_time, jiffies));
1385 if (cifsInode->time == 0) {
1386 /* was set to zero previously to force revalidate */
1387 } else if (time_before(jiffies, cifsInode->time + HZ) &&
1388 lookupCacheEnabled) {
1389 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1390 (direntry->d_inode->i_nlink == 1)) {
1395 cFYI(1, ("Have to revalidate file due to hardlinks"));
1399 /* save mtime and size */
1400 local_mtime = direntry->d_inode->i_mtime;
1401 local_size = direntry->d_inode->i_size;
1403 if (cifs_sb->tcon->unix_ext) {
1404 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1405 direntry->d_sb, xid);
1407 cFYI(1, ("error on getting revalidate info %d", rc));
1408 /* if (rc != -ENOENT)
1409 rc = 0; */ /* BB should we cache info on
1413 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1414 direntry->d_sb, xid, NULL);
1416 cFYI(1, ("error on getting revalidate info %d", rc));
1417 /* if (rc != -ENOENT)
1418 rc = 0; */ /* BB should we cache info on
1422 /* should we remap certain errors, access denied?, to zero */
1424 /* if not oplocked, we invalidate inode pages if mtime or file size
1425 had changed on server */
1427 if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) &&
1428 (local_size == direntry->d_inode->i_size)) {
1429 cFYI(1, ("cifs_revalidate - inode unchanged"));
1431 /* file may have changed on server */
1432 if (cifsInode->clientCanCacheRead) {
1433 /* no need to invalidate inode pages since we were the
1434 only ones who could have modified the file and the
1435 server copy is staler than ours */
1437 invalidate_inode = true;
1441 /* can not grab this sem since kernel filesys locking documentation
1442 indicates i_mutex may be taken by the kernel on lookup and rename
1443 which could deadlock if we grab the i_mutex here as well */
1444 /* mutex_lock(&direntry->d_inode->i_mutex);*/
1445 /* need to write out dirty pages here */
1446 if (direntry->d_inode->i_mapping) {
1447 /* do we need to lock inode until after invalidate completes
1449 wbrc = filemap_fdatawrite(direntry->d_inode->i_mapping);
1451 CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1453 if (invalidate_inode) {
1454 /* shrink_dcache not necessary now that cifs dentry ops
1455 are exported for negative dentries */
1456 /* if (S_ISDIR(direntry->d_inode->i_mode))
1457 shrink_dcache_parent(direntry); */
1458 if (S_ISREG(direntry->d_inode->i_mode)) {
1459 if (direntry->d_inode->i_mapping) {
1460 wbrc = filemap_fdatawait(direntry->d_inode->i_mapping);
1462 CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1464 /* may eventually have to do this for open files too */
1465 if (list_empty(&(cifsInode->openFileList))) {
1466 /* changed on server - flush read ahead pages */
1467 cFYI(1, ("Invalidating read ahead data on "
1469 invalidate_remote_inode(direntry->d_inode);
1473 /* mutex_unlock(&direntry->d_inode->i_mutex); */
1480 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1483 int err = cifs_revalidate(dentry);
1485 generic_fillattr(dentry->d_inode, stat);
1486 stat->blksize = CIFS_MAX_MSGSIZE;
1491 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1493 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1494 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1498 page = grab_cache_page(mapping, index);
1502 zero_user_segment(page, offset, PAGE_CACHE_SIZE);
1504 page_cache_release(page);
1508 static int cifs_vmtruncate(struct inode *inode, loff_t offset)
1510 struct address_space *mapping = inode->i_mapping;
1511 unsigned long limit;
1513 spin_lock(&inode->i_lock);
1514 if (inode->i_size < offset)
1517 * truncation of in-use swapfiles is disallowed - it would cause
1518 * subsequent swapout to scribble on the now-freed blocks.
1520 if (IS_SWAPFILE(inode)) {
1521 spin_unlock(&inode->i_lock);
1524 i_size_write(inode, offset);
1525 spin_unlock(&inode->i_lock);
1527 * unmap_mapping_range is called twice, first simply for efficiency
1528 * so that truncate_inode_pages does fewer single-page unmaps. However
1529 * after this first call, and before truncate_inode_pages finishes,
1530 * it is possible for private pages to be COWed, which remain after
1531 * truncate_inode_pages finishes, hence the second unmap_mapping_range
1532 * call must be made for correctness.
1534 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1535 truncate_inode_pages(mapping, offset);
1536 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1540 limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
1541 if (limit != RLIM_INFINITY && offset > limit) {
1542 spin_unlock(&inode->i_lock);
1545 if (offset > inode->i_sb->s_maxbytes) {
1546 spin_unlock(&inode->i_lock);
1549 i_size_write(inode, offset);
1550 spin_unlock(&inode->i_lock);
1552 if (inode->i_op && inode->i_op->truncate)
1553 inode->i_op->truncate(inode);
1556 send_sig(SIGXFSZ, current, 0);
1564 cifs_set_file_size(struct inode *inode, struct iattr *attrs,
1565 int xid, char *full_path)
1568 struct cifsFileInfo *open_file;
1569 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1570 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1571 struct cifsTconInfo *pTcon = cifs_sb->tcon;
1574 * To avoid spurious oplock breaks from server, in the case of
1575 * inodes that we already have open, avoid doing path based
1576 * setting of file size if we can do it by handle.
1577 * This keeps our caching token (oplock) and avoids timeouts
1578 * when the local oplock break takes longer to flush
1579 * writebehind data than the SMB timeout for the SetPathInfo
1580 * request would allow
1582 open_file = find_writable_file(cifsInode);
1584 __u16 nfid = open_file->netfid;
1585 __u32 npid = open_file->pid;
1586 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size, nfid,
1588 atomic_dec(&open_file->wrtPending);
1589 cFYI(1, ("SetFSize for attrs rc = %d", rc));
1590 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1591 unsigned int bytes_written;
1592 rc = CIFSSMBWrite(xid, pTcon, nfid, 0, attrs->ia_size,
1593 &bytes_written, NULL, NULL, 1);
1594 cFYI(1, ("Wrt seteof rc %d", rc));
1600 /* Set file size by pathname rather than by handle
1601 either because no valid, writeable file handle for
1602 it was found or because there was an error setting
1604 rc = CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size,
1605 false, cifs_sb->local_nls,
1606 cifs_sb->mnt_cifs_flags &
1607 CIFS_MOUNT_MAP_SPECIAL_CHR);
1608 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1609 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1613 rc = SMBLegacyOpen(xid, pTcon, full_path,
1614 FILE_OPEN, GENERIC_WRITE,
1615 CREATE_NOT_DIR, &netfid, &oplock, NULL,
1617 cifs_sb->mnt_cifs_flags &
1618 CIFS_MOUNT_MAP_SPECIAL_CHR);
1620 unsigned int bytes_written;
1621 rc = CIFSSMBWrite(xid, pTcon, netfid, 0,
1623 &bytes_written, NULL,
1625 cFYI(1, ("wrt seteof rc %d", rc));
1626 CIFSSMBClose(xid, pTcon, netfid);
1632 rc = cifs_vmtruncate(inode, attrs->ia_size);
1633 cifs_truncate_page(inode->i_mapping, inode->i_size);
1640 cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
1644 char *full_path = NULL;
1645 struct inode *inode = direntry->d_inode;
1646 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1647 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1648 struct cifsTconInfo *pTcon = cifs_sb->tcon;
1649 struct cifs_unix_set_info_args *args = NULL;
1651 cFYI(1, ("setattr_unix on file %s attrs->ia_valid=0x%x",
1652 direntry->d_name.name, attrs->ia_valid));
1656 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1657 /* check if we have permission to change attrs */
1658 rc = inode_change_ok(inode, attrs);
1665 full_path = build_path_from_dentry(direntry);
1666 if (full_path == NULL) {
1671 if ((attrs->ia_valid & ATTR_MTIME) || (attrs->ia_valid & ATTR_SIZE)) {
1673 Flush data before changing file size or changing the last
1674 write time of the file on the server. If the
1675 flush returns error, store it to report later and continue.
1676 BB: This should be smarter. Why bother flushing pages that
1677 will be truncated anyway? Also, should we error out here if
1678 the flush returns error?
1680 rc = filemap_write_and_wait(inode->i_mapping);
1682 cifsInode->write_behind_rc = rc;
1687 if (attrs->ia_valid & ATTR_SIZE) {
1688 rc = cifs_set_file_size(inode, attrs, xid, full_path);
1693 /* skip mode change if it's just for clearing setuid/setgid */
1694 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1695 attrs->ia_valid &= ~ATTR_MODE;
1697 args = kmalloc(sizeof(*args), GFP_KERNEL);
1703 /* set up the struct */
1704 if (attrs->ia_valid & ATTR_MODE)
1705 args->mode = attrs->ia_mode;
1707 args->mode = NO_CHANGE_64;
1709 if (attrs->ia_valid & ATTR_UID)
1710 args->uid = attrs->ia_uid;
1712 args->uid = NO_CHANGE_64;
1714 if (attrs->ia_valid & ATTR_GID)
1715 args->gid = attrs->ia_gid;
1717 args->gid = NO_CHANGE_64;
1719 if (attrs->ia_valid & ATTR_ATIME)
1720 args->atime = cifs_UnixTimeToNT(attrs->ia_atime);
1722 args->atime = NO_CHANGE_64;
1724 if (attrs->ia_valid & ATTR_MTIME)
1725 args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime);
1727 args->mtime = NO_CHANGE_64;
1729 if (attrs->ia_valid & ATTR_CTIME)
1730 args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime);
1732 args->ctime = NO_CHANGE_64;
1735 rc = CIFSSMBUnixSetInfo(xid, pTcon, full_path, args,
1737 cifs_sb->mnt_cifs_flags &
1738 CIFS_MOUNT_MAP_SPECIAL_CHR);
1741 rc = inode_setattr(inode, attrs);
1750 cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
1753 struct inode *inode = direntry->d_inode;
1754 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1755 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1756 char *full_path = NULL;
1759 __u64 mode = NO_CHANGE_64;
1763 cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1764 direntry->d_name.name, attrs->ia_valid));
1766 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1767 /* check if we have permission to change attrs */
1768 rc = inode_change_ok(inode, attrs);
1776 full_path = build_path_from_dentry(direntry);
1777 if (full_path == NULL) {
1782 if ((attrs->ia_valid & ATTR_MTIME) || (attrs->ia_valid & ATTR_SIZE)) {
1784 Flush data before changing file size or changing the last
1785 write time of the file on the server. If the
1786 flush returns error, store it to report later and continue.
1787 BB: This should be smarter. Why bother flushing pages that
1788 will be truncated anyway? Also, should we error out here if
1789 the flush returns error?
1791 rc = filemap_write_and_wait(inode->i_mapping);
1793 cifsInode->write_behind_rc = rc;
1798 if (attrs->ia_valid & ATTR_SIZE) {
1799 rc = cifs_set_file_size(inode, attrs, xid, full_path);
1801 goto cifs_setattr_exit;
1805 * Without unix extensions we can't send ownership changes to the
1806 * server, so silently ignore them. This is consistent with how
1807 * local DOS/Windows filesystems behave (VFAT, NTFS, etc). With
1808 * CIFSACL support + proper Windows to Unix idmapping, we may be
1809 * able to support this in the future.
1811 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID))
1812 attrs->ia_valid &= ~(ATTR_UID | ATTR_GID);
1814 /* skip mode change if it's just for clearing setuid/setgid */
1815 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1816 attrs->ia_valid &= ~ATTR_MODE;
1818 if (attrs->ia_valid & ATTR_MODE) {
1819 cFYI(1, ("Mode changed to 0%o", attrs->ia_mode));
1820 mode = attrs->ia_mode;
1823 if (attrs->ia_valid & ATTR_MODE) {
1825 #ifdef CONFIG_CIFS_EXPERIMENTAL
1826 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
1827 rc = mode_to_acl(inode, full_path, mode);
1830 if (((mode & S_IWUGO) == 0) &&
1831 (cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
1833 dosattr = cifsInode->cifsAttrs | ATTR_READONLY;
1835 /* fix up mode if we're not using dynperm */
1836 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
1837 attrs->ia_mode = inode->i_mode & ~S_IWUGO;
1838 } else if ((mode & S_IWUGO) &&
1839 (cifsInode->cifsAttrs & ATTR_READONLY)) {
1841 dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
1842 /* Attributes of 0 are ignored */
1844 dosattr |= ATTR_NORMAL;
1846 /* reset local inode permissions to normal */
1847 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
1848 attrs->ia_mode &= ~(S_IALLUGO);
1849 if (S_ISDIR(inode->i_mode))
1851 cifs_sb->mnt_dir_mode;
1854 cifs_sb->mnt_file_mode;
1856 } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
1857 /* ignore mode change - ATTR_READONLY hasn't changed */
1858 attrs->ia_valid &= ~ATTR_MODE;
1862 if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) ||
1863 ((attrs->ia_valid & ATTR_MODE) && dosattr)) {
1864 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
1865 /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */
1867 /* Even if error on time set, no sense failing the call if
1868 the server would set the time to a reasonable value anyway,
1869 and this check ensures that we are not being called from
1870 sys_utimes in which case we ought to fail the call back to
1871 the user when the server rejects the call */
1872 if ((rc) && (attrs->ia_valid &
1873 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1877 /* do not need local check to inode_check_ok since the server does
1880 rc = inode_setattr(inode, attrs);
1888 cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1890 struct inode *inode = direntry->d_inode;
1891 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1892 struct cifsTconInfo *pTcon = cifs_sb->tcon;
1894 if (pTcon->unix_ext)
1895 return cifs_setattr_unix(direntry, attrs);
1897 return cifs_setattr_nounix(direntry, attrs);
1899 /* BB: add cifs_setattr_legacy for really old servers */
1903 void cifs_delete_inode(struct inode *inode)
1905 cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1906 /* may have to add back in if and when safe distributed caching of
1907 directories added e.g. via FindNotify */