4 * Copyright (C) International Business Machines Corp., 2002,2010
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/slab.h>
24 #include <linux/pagemap.h>
25 #include <asm/div64.h>
29 #include "cifsproto.h"
30 #include "cifs_debug.h"
31 #include "cifs_fs_sb.h"
35 static void cifs_set_ops(struct inode *inode, const bool is_dfs_referral)
37 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
39 switch (inode->i_mode & S_IFMT) {
41 inode->i_op = &cifs_file_inode_ops;
42 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
43 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
44 inode->i_fop = &cifs_file_direct_nobrl_ops;
46 inode->i_fop = &cifs_file_direct_ops;
47 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
48 inode->i_fop = &cifs_file_nobrl_ops;
49 else { /* not direct, send byte range locks */
50 inode->i_fop = &cifs_file_ops;
54 /* check if server can support readpages */
55 if (cifs_sb_master_tcon(cifs_sb)->ses->server->maxBuf <
56 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
57 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
59 inode->i_data.a_ops = &cifs_addr_ops;
62 #ifdef CONFIG_CIFS_DFS_UPCALL
63 if (is_dfs_referral) {
64 inode->i_op = &cifs_dfs_referral_inode_operations;
66 #else /* NO DFS support, treat as a directory */
69 inode->i_op = &cifs_dir_inode_ops;
70 inode->i_fop = &cifs_dir_ops;
74 inode->i_op = &cifs_symlink_inode_ops;
77 init_special_inode(inode, inode->i_mode, inode->i_rdev);
82 /* check inode attributes against fattr. If they don't match, tag the
83 * inode for cache invalidation
86 cifs_revalidate_cache(struct inode *inode, struct cifs_fattr *fattr)
88 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
90 cFYI(1, "%s: revalidating inode %llu", __func__, cifs_i->uniqueid);
92 if (inode->i_state & I_NEW) {
93 cFYI(1, "%s: inode %llu is new", __func__, cifs_i->uniqueid);
97 /* don't bother with revalidation if we have an oplock */
98 if (cifs_i->clientCanCacheRead) {
99 cFYI(1, "%s: inode %llu is oplocked", __func__,
104 /* revalidate if mtime or size have changed */
105 if (timespec_equal(&inode->i_mtime, &fattr->cf_mtime) &&
106 cifs_i->server_eof == fattr->cf_eof) {
107 cFYI(1, "%s: inode %llu is unchanged", __func__,
112 cFYI(1, "%s: invalidating inode %llu mapping", __func__,
114 cifs_i->invalid_mapping = true;
117 /* populate an inode with info from a cifs_fattr struct */
119 cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr)
121 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
122 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
123 unsigned long oldtime = cifs_i->time;
125 cifs_revalidate_cache(inode, fattr);
127 inode->i_atime = fattr->cf_atime;
128 inode->i_mtime = fattr->cf_mtime;
129 inode->i_ctime = fattr->cf_ctime;
130 inode->i_rdev = fattr->cf_rdev;
131 inode->i_nlink = fattr->cf_nlink;
132 inode->i_uid = fattr->cf_uid;
133 inode->i_gid = fattr->cf_gid;
135 /* if dynperm is set, don't clobber existing mode */
136 if (inode->i_state & I_NEW ||
137 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM))
138 inode->i_mode = fattr->cf_mode;
140 cifs_i->cifsAttrs = fattr->cf_cifsattrs;
142 if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL)
145 cifs_i->time = jiffies;
147 cFYI(1, "inode 0x%p old_time=%ld new_time=%ld", inode,
148 oldtime, cifs_i->time);
150 cifs_i->delete_pending = fattr->cf_flags & CIFS_FATTR_DELETE_PENDING;
152 cifs_i->server_eof = fattr->cf_eof;
154 * Can't safely change the file size here if the client is writing to
155 * it due to potential races.
157 spin_lock(&inode->i_lock);
158 if (is_size_safe_to_change(cifs_i, fattr->cf_eof)) {
159 i_size_write(inode, fattr->cf_eof);
162 * i_blocks is not related to (i_size / i_blksize),
163 * but instead 512 byte (2**9) size is required for
164 * calculating num blocks.
166 inode->i_blocks = (512 - 1 + fattr->cf_bytes) >> 9;
168 spin_unlock(&inode->i_lock);
170 cifs_set_ops(inode, fattr->cf_flags & CIFS_FATTR_DFS_REFERRAL);
174 cifs_fill_uniqueid(struct super_block *sb, struct cifs_fattr *fattr)
176 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
178 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
181 fattr->cf_uniqueid = iunique(sb, ROOT_I);
184 /* Fill a cifs_fattr struct with info from FILE_UNIX_BASIC_INFO. */
186 cifs_unix_basic_to_fattr(struct cifs_fattr *fattr, FILE_UNIX_BASIC_INFO *info,
187 struct cifs_sb_info *cifs_sb)
189 memset(fattr, 0, sizeof(*fattr));
190 fattr->cf_uniqueid = le64_to_cpu(info->UniqueId);
191 fattr->cf_bytes = le64_to_cpu(info->NumOfBytes);
192 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
194 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
195 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastModificationTime);
196 fattr->cf_ctime = cifs_NTtimeToUnix(info->LastStatusChange);
197 fattr->cf_mode = le64_to_cpu(info->Permissions);
200 * Since we set the inode type below we need to mask off
201 * to avoid strange results if bits set above.
203 fattr->cf_mode &= ~S_IFMT;
204 switch (le32_to_cpu(info->Type)) {
206 fattr->cf_mode |= S_IFREG;
207 fattr->cf_dtype = DT_REG;
210 fattr->cf_mode |= S_IFLNK;
211 fattr->cf_dtype = DT_LNK;
214 fattr->cf_mode |= S_IFDIR;
215 fattr->cf_dtype = DT_DIR;
218 fattr->cf_mode |= S_IFCHR;
219 fattr->cf_dtype = DT_CHR;
220 fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor),
221 le64_to_cpu(info->DevMinor) & MINORMASK);
224 fattr->cf_mode |= S_IFBLK;
225 fattr->cf_dtype = DT_BLK;
226 fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor),
227 le64_to_cpu(info->DevMinor) & MINORMASK);
230 fattr->cf_mode |= S_IFIFO;
231 fattr->cf_dtype = DT_FIFO;
234 fattr->cf_mode |= S_IFSOCK;
235 fattr->cf_dtype = DT_SOCK;
238 /* safest to call it a file if we do not know */
239 fattr->cf_mode |= S_IFREG;
240 fattr->cf_dtype = DT_REG;
241 cFYI(1, "unknown type %d", le32_to_cpu(info->Type));
245 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
246 fattr->cf_uid = cifs_sb->mnt_uid;
248 fattr->cf_uid = le64_to_cpu(info->Uid);
250 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
251 fattr->cf_gid = cifs_sb->mnt_gid;
253 fattr->cf_gid = le64_to_cpu(info->Gid);
255 fattr->cf_nlink = le64_to_cpu(info->Nlinks);
259 * Fill a cifs_fattr struct with fake inode info.
261 * Needed to setup cifs_fattr data for the directory which is the
262 * junction to the new submount (ie to setup the fake directory
263 * which represents a DFS referral).
266 cifs_create_dfs_fattr(struct cifs_fattr *fattr, struct super_block *sb)
268 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
270 cFYI(1, "creating fake fattr for DFS referral");
272 memset(fattr, 0, sizeof(*fattr));
273 fattr->cf_mode = S_IFDIR | S_IXUGO | S_IRWXU;
274 fattr->cf_uid = cifs_sb->mnt_uid;
275 fattr->cf_gid = cifs_sb->mnt_gid;
276 fattr->cf_atime = CURRENT_TIME;
277 fattr->cf_ctime = CURRENT_TIME;
278 fattr->cf_mtime = CURRENT_TIME;
280 fattr->cf_flags |= CIFS_FATTR_DFS_REFERRAL;
283 int cifs_get_file_info_unix(struct file *filp)
287 FILE_UNIX_BASIC_INFO find_data;
288 struct cifs_fattr fattr;
289 struct inode *inode = filp->f_path.dentry->d_inode;
290 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
291 struct cifsFileInfo *cfile = filp->private_data;
292 struct cifsTconInfo *tcon = tlink_tcon(cfile->tlink);
295 rc = CIFSSMBUnixQFileInfo(xid, tcon, cfile->netfid, &find_data);
297 cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb);
298 } else if (rc == -EREMOTE) {
299 cifs_create_dfs_fattr(&fattr, inode->i_sb);
303 cifs_fattr_to_inode(inode, &fattr);
308 int cifs_get_inode_info_unix(struct inode **pinode,
309 const unsigned char *full_path,
310 struct super_block *sb, int xid)
313 FILE_UNIX_BASIC_INFO find_data;
314 struct cifs_fattr fattr;
315 struct cifsTconInfo *tcon;
316 struct tcon_link *tlink;
317 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
319 cFYI(1, "Getting info on %s", full_path);
321 tlink = cifs_sb_tlink(cifs_sb);
323 return PTR_ERR(tlink);
324 tcon = tlink_tcon(tlink);
326 /* could have done a find first instead but this returns more info */
327 rc = CIFSSMBUnixQPathInfo(xid, tcon, full_path, &find_data,
328 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
329 CIFS_MOUNT_MAP_SPECIAL_CHR);
330 cifs_put_tlink(tlink);
333 cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb);
334 } else if (rc == -EREMOTE) {
335 cifs_create_dfs_fattr(&fattr, sb);
341 /* check for Minshall+French symlinks */
342 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
343 int tmprc = CIFSCheckMFSymlink(&fattr, full_path, cifs_sb, xid);
345 cFYI(1, "CIFSCheckMFSymlink: %d", tmprc);
348 if (*pinode == NULL) {
350 cifs_fill_uniqueid(sb, &fattr);
351 *pinode = cifs_iget(sb, &fattr);
355 /* we already have inode, update it */
356 cifs_fattr_to_inode(*pinode, &fattr);
363 cifs_sfu_type(struct cifs_fattr *fattr, const unsigned char *path,
364 struct cifs_sb_info *cifs_sb, int xid)
369 struct tcon_link *tlink;
370 struct cifsTconInfo *tcon;
372 unsigned int bytes_read;
377 fattr->cf_mode &= ~S_IFMT;
379 if (fattr->cf_eof == 0) {
380 fattr->cf_mode |= S_IFIFO;
381 fattr->cf_dtype = DT_FIFO;
383 } else if (fattr->cf_eof < 8) {
384 fattr->cf_mode |= S_IFREG;
385 fattr->cf_dtype = DT_REG;
386 return -EINVAL; /* EOPNOTSUPP? */
389 tlink = cifs_sb_tlink(cifs_sb);
391 return PTR_ERR(tlink);
392 tcon = tlink_tcon(tlink);
394 rc = CIFSSMBOpen(xid, tcon, path, FILE_OPEN, GENERIC_READ,
395 CREATE_NOT_DIR, &netfid, &oplock, NULL,
397 cifs_sb->mnt_cifs_flags &
398 CIFS_MOUNT_MAP_SPECIAL_CHR);
400 int buf_type = CIFS_NO_BUFFER;
402 rc = CIFSSMBRead(xid, tcon, netfid,
403 24 /* length */, 0 /* offset */,
404 &bytes_read, &pbuf, &buf_type);
405 if ((rc == 0) && (bytes_read >= 8)) {
406 if (memcmp("IntxBLK", pbuf, 8) == 0) {
407 cFYI(1, "Block device");
408 fattr->cf_mode |= S_IFBLK;
409 fattr->cf_dtype = DT_BLK;
410 if (bytes_read == 24) {
411 /* we have enough to decode dev num */
412 __u64 mjr; /* major */
413 __u64 mnr; /* minor */
414 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
415 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
416 fattr->cf_rdev = MKDEV(mjr, mnr);
418 } else if (memcmp("IntxCHR", pbuf, 8) == 0) {
419 cFYI(1, "Char device");
420 fattr->cf_mode |= S_IFCHR;
421 fattr->cf_dtype = DT_CHR;
422 if (bytes_read == 24) {
423 /* we have enough to decode dev num */
424 __u64 mjr; /* major */
425 __u64 mnr; /* minor */
426 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
427 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
428 fattr->cf_rdev = MKDEV(mjr, mnr);
430 } else if (memcmp("IntxLNK", pbuf, 7) == 0) {
432 fattr->cf_mode |= S_IFLNK;
433 fattr->cf_dtype = DT_LNK;
435 fattr->cf_mode |= S_IFREG; /* file? */
436 fattr->cf_dtype = DT_REG;
440 fattr->cf_mode |= S_IFREG; /* then it is a file */
441 fattr->cf_dtype = DT_REG;
442 rc = -EOPNOTSUPP; /* or some unknown SFU type */
444 CIFSSMBClose(xid, tcon, netfid);
446 cifs_put_tlink(tlink);
450 #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
453 * Fetch mode bits as provided by SFU.
455 * FIXME: Doesn't this clobber the type bit we got from cifs_sfu_type ?
457 static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path,
458 struct cifs_sb_info *cifs_sb, int xid)
460 #ifdef CONFIG_CIFS_XATTR
464 struct tcon_link *tlink;
465 struct cifsTconInfo *tcon;
467 tlink = cifs_sb_tlink(cifs_sb);
469 return PTR_ERR(tlink);
470 tcon = tlink_tcon(tlink);
472 rc = CIFSSMBQAllEAs(xid, tcon, path, "SETFILEBITS",
473 ea_value, 4 /* size of buf */, cifs_sb->local_nls,
474 cifs_sb->mnt_cifs_flags &
475 CIFS_MOUNT_MAP_SPECIAL_CHR);
476 cifs_put_tlink(tlink);
480 mode = le32_to_cpu(*((__le32 *)ea_value));
481 fattr->cf_mode &= ~SFBITS_MASK;
482 cFYI(1, "special bits 0%o org mode 0%o", mode,
484 fattr->cf_mode = (mode & SFBITS_MASK) | fattr->cf_mode;
485 cFYI(1, "special mode bits 0%o", mode);
494 /* Fill a cifs_fattr struct with info from FILE_ALL_INFO */
496 cifs_all_info_to_fattr(struct cifs_fattr *fattr, FILE_ALL_INFO *info,
497 struct cifs_sb_info *cifs_sb, bool adjust_tz)
499 struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb);
501 memset(fattr, 0, sizeof(*fattr));
502 fattr->cf_cifsattrs = le32_to_cpu(info->Attributes);
503 if (info->DeletePending)
504 fattr->cf_flags |= CIFS_FATTR_DELETE_PENDING;
506 if (info->LastAccessTime)
507 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
509 fattr->cf_atime = CURRENT_TIME;
511 fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime);
512 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);
515 fattr->cf_ctime.tv_sec += tcon->ses->server->timeAdj;
516 fattr->cf_mtime.tv_sec += tcon->ses->server->timeAdj;
519 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
520 fattr->cf_bytes = le64_to_cpu(info->AllocationSize);
521 fattr->cf_createtime = le64_to_cpu(info->CreationTime);
523 if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
524 fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode;
525 fattr->cf_dtype = DT_DIR;
527 fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode;
528 fattr->cf_dtype = DT_REG;
530 /* clear write bits if ATTR_READONLY is set */
531 if (fattr->cf_cifsattrs & ATTR_READONLY)
532 fattr->cf_mode &= ~(S_IWUGO);
535 fattr->cf_nlink = le32_to_cpu(info->NumberOfLinks);
537 fattr->cf_uid = cifs_sb->mnt_uid;
538 fattr->cf_gid = cifs_sb->mnt_gid;
541 int cifs_get_file_info(struct file *filp)
545 FILE_ALL_INFO find_data;
546 struct cifs_fattr fattr;
547 struct inode *inode = filp->f_path.dentry->d_inode;
548 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
549 struct cifsFileInfo *cfile = filp->private_data;
550 struct cifsTconInfo *tcon = tlink_tcon(cfile->tlink);
553 rc = CIFSSMBQFileInfo(xid, tcon, cfile->netfid, &find_data);
554 if (rc == -EOPNOTSUPP || rc == -EINVAL) {
556 * FIXME: legacy server -- fall back to path-based call?
557 * for now, just skip revalidating and mark inode for
561 CIFS_I(inode)->time = 0;
563 } else if (rc == -EREMOTE) {
564 cifs_create_dfs_fattr(&fattr, inode->i_sb);
570 * don't bother with SFU junk here -- just mark inode as needing
573 cifs_all_info_to_fattr(&fattr, &find_data, cifs_sb, false);
574 fattr.cf_uniqueid = CIFS_I(inode)->uniqueid;
575 fattr.cf_flags |= CIFS_FATTR_NEED_REVAL;
576 cifs_fattr_to_inode(inode, &fattr);
582 int cifs_get_inode_info(struct inode **pinode,
583 const unsigned char *full_path, FILE_ALL_INFO *pfindData,
584 struct super_block *sb, int xid, const __u16 *pfid)
587 struct cifsTconInfo *pTcon;
588 struct tcon_link *tlink;
589 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
591 bool adjustTZ = false;
592 struct cifs_fattr fattr;
594 tlink = cifs_sb_tlink(cifs_sb);
596 return PTR_ERR(tlink);
597 pTcon = tlink_tcon(tlink);
599 cFYI(1, "Getting info on %s", full_path);
601 if ((pfindData == NULL) && (*pinode != NULL)) {
602 if (CIFS_I(*pinode)->clientCanCacheRead) {
603 cFYI(1, "No need to revalidate cached inode sizes");
608 /* if file info not passed in then get it from server */
609 if (pfindData == NULL) {
610 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
615 pfindData = (FILE_ALL_INFO *)buf;
617 /* could do find first instead but this returns more info */
618 rc = CIFSSMBQPathInfo(xid, pTcon, full_path, pfindData,
620 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
621 CIFS_MOUNT_MAP_SPECIAL_CHR);
622 /* BB optimize code so we do not make the above call
623 when server claims no NT SMB support and the above call
624 failed at least once - set flag in tcon or mount */
625 if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
626 rc = SMBQueryInformation(xid, pTcon, full_path,
627 pfindData, cifs_sb->local_nls,
628 cifs_sb->mnt_cifs_flags &
629 CIFS_MOUNT_MAP_SPECIAL_CHR);
635 cifs_all_info_to_fattr(&fattr, (FILE_ALL_INFO *) pfindData,
637 } else if (rc == -EREMOTE) {
638 cifs_create_dfs_fattr(&fattr, sb);
645 * If an inode wasn't passed in, then get the inode number
647 * Is an i_ino of zero legal? Can we use that to check if the server
648 * supports returning inode numbers? Are there other sanity checks we
649 * can use to ensure that the server is really filling in that field?
651 * We can not use the IndexNumber field by default from Windows or
652 * Samba (in ALL_INFO buf) but we can request it explicitly. The SNIA
653 * CIFS spec claims that this value is unique within the scope of a
654 * share, and the windows docs hint that it's actually unique
657 * There may be higher info levels that work but are there Windows
658 * server or network appliances for which IndexNumber field is not
661 if (*pinode == NULL) {
662 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
665 rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
666 full_path, &fattr.cf_uniqueid,
668 cifs_sb->mnt_cifs_flags &
669 CIFS_MOUNT_MAP_SPECIAL_CHR);
670 if (rc1 || !fattr.cf_uniqueid) {
671 cFYI(1, "GetSrvInodeNum rc %d", rc1);
672 fattr.cf_uniqueid = iunique(sb, ROOT_I);
673 cifs_autodisable_serverino(cifs_sb);
676 fattr.cf_uniqueid = iunique(sb, ROOT_I);
679 fattr.cf_uniqueid = CIFS_I(*pinode)->uniqueid;
682 /* query for SFU type info if supported and needed */
683 if (fattr.cf_cifsattrs & ATTR_SYSTEM &&
684 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
685 tmprc = cifs_sfu_type(&fattr, full_path, cifs_sb, xid);
687 cFYI(1, "cifs_sfu_type failed: %d", tmprc);
690 #ifdef CONFIG_CIFS_ACL
691 /* fill in 0777 bits from ACL */
692 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
693 rc = cifs_acl_to_fattr(cifs_sb, &fattr, *pinode, full_path,
696 cFYI(1, "%s: Getting ACL failed with error: %d",
701 #endif /* CONFIG_CIFS_ACL */
703 /* fill in remaining high mode bits e.g. SUID, VTX */
704 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
705 cifs_sfu_mode(&fattr, full_path, cifs_sb, xid);
707 /* check for Minshall+French symlinks */
708 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
709 tmprc = CIFSCheckMFSymlink(&fattr, full_path, cifs_sb, xid);
711 cFYI(1, "CIFSCheckMFSymlink: %d", tmprc);
715 *pinode = cifs_iget(sb, &fattr);
719 cifs_fattr_to_inode(*pinode, &fattr);
724 cifs_put_tlink(tlink);
728 static const struct inode_operations cifs_ipc_inode_ops = {
729 .lookup = cifs_lookup,
732 char *cifs_build_path_to_root(struct cifs_sb_info *cifs_sb,
733 struct cifsTconInfo *tcon)
735 int pplen = cifs_sb->prepathlen;
737 char *full_path = NULL;
739 /* if no prefix path, simply set path to the root of share to "" */
741 full_path = kmalloc(1, GFP_KERNEL);
747 if (tcon->Flags & SMB_SHARE_IS_IN_DFS)
748 dfsplen = strnlen(tcon->treeName, MAX_TREE_SIZE + 1);
752 full_path = kmalloc(dfsplen + pplen + 1, GFP_KERNEL);
753 if (full_path == NULL)
757 strncpy(full_path, tcon->treeName, dfsplen);
758 /* switch slash direction in prepath depending on whether
759 * windows or posix style path names
761 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) {
763 for (i = 0; i < dfsplen; i++) {
764 if (full_path[i] == '\\')
769 strncpy(full_path + dfsplen, cifs_sb->prepath, pplen);
770 full_path[dfsplen + pplen] = 0; /* add trailing null */
775 cifs_find_inode(struct inode *inode, void *opaque)
777 struct cifs_fattr *fattr = (struct cifs_fattr *) opaque;
779 /* don't match inode with different uniqueid */
780 if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid)
783 /* use createtime like an i_generation field */
784 if (CIFS_I(inode)->createtime != fattr->cf_createtime)
787 /* don't match inode of different type */
788 if ((inode->i_mode & S_IFMT) != (fattr->cf_mode & S_IFMT))
791 /* if it's not a directory or has no dentries, then flag it */
792 if (S_ISDIR(inode->i_mode) && !list_empty(&inode->i_dentry))
793 fattr->cf_flags |= CIFS_FATTR_INO_COLLISION;
799 cifs_init_inode(struct inode *inode, void *opaque)
801 struct cifs_fattr *fattr = (struct cifs_fattr *) opaque;
803 CIFS_I(inode)->uniqueid = fattr->cf_uniqueid;
804 CIFS_I(inode)->createtime = fattr->cf_createtime;
809 * walk dentry list for an inode and report whether it has aliases that
810 * are hashed. We use this to determine if a directory inode can actually
814 inode_has_hashed_dentries(struct inode *inode)
816 struct dentry *dentry;
818 spin_lock(&inode->i_lock);
819 list_for_each_entry(dentry, &inode->i_dentry, d_alias) {
820 if (!d_unhashed(dentry) || IS_ROOT(dentry)) {
821 spin_unlock(&inode->i_lock);
825 spin_unlock(&inode->i_lock);
829 /* Given fattrs, get a corresponding inode */
831 cifs_iget(struct super_block *sb, struct cifs_fattr *fattr)
837 cFYI(1, "looking for uniqueid=%llu", fattr->cf_uniqueid);
839 /* hash down to 32-bits on 32-bit arch */
840 hash = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid);
842 inode = iget5_locked(sb, hash, cifs_find_inode, cifs_init_inode, fattr);
844 /* was there a potentially problematic inode collision? */
845 if (fattr->cf_flags & CIFS_FATTR_INO_COLLISION) {
846 fattr->cf_flags &= ~CIFS_FATTR_INO_COLLISION;
848 if (inode_has_hashed_dentries(inode)) {
849 cifs_autodisable_serverino(CIFS_SB(sb));
851 fattr->cf_uniqueid = iunique(sb, ROOT_I);
852 goto retry_iget5_locked;
856 cifs_fattr_to_inode(inode, fattr);
857 if (sb->s_flags & MS_NOATIME)
858 inode->i_flags |= S_NOATIME | S_NOCMTIME;
859 if (inode->i_state & I_NEW) {
861 if (S_ISREG(inode->i_mode))
862 inode->i_data.backing_dev_info = sb->s_bdi;
863 #ifdef CONFIG_CIFS_FSCACHE
864 /* initialize per-inode cache cookie pointer */
865 CIFS_I(inode)->fscache = NULL;
867 unlock_new_inode(inode);
874 /* gets root inode */
875 struct inode *cifs_root_iget(struct super_block *sb, unsigned long ino)
878 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
879 struct inode *inode = NULL;
882 struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb);
884 full_path = cifs_build_path_to_root(cifs_sb, tcon);
885 if (full_path == NULL)
886 return ERR_PTR(-ENOMEM);
890 rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid);
892 rc = cifs_get_inode_info(&inode, full_path, NULL, sb,
900 #ifdef CONFIG_CIFS_FSCACHE
901 /* populate tcon->resource_id */
902 tcon->resource_id = CIFS_I(inode)->uniqueid;
905 if (rc && tcon->ipc) {
906 cFYI(1, "ipc connection - fake read inode");
907 inode->i_mode |= S_IFDIR;
909 inode->i_op = &cifs_ipc_inode_ops;
910 inode->i_fop = &simple_dir_operations;
911 inode->i_uid = cifs_sb->mnt_uid;
912 inode->i_gid = cifs_sb->mnt_gid;
920 /* can not call macro FreeXid here since in a void func
921 * TODO: This is no longer true
928 cifs_set_file_info(struct inode *inode, struct iattr *attrs, int xid,
929 char *full_path, __u32 dosattr)
935 bool set_time = false;
936 struct cifsFileInfo *open_file;
937 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
938 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
939 struct tcon_link *tlink = NULL;
940 struct cifsTconInfo *pTcon;
941 FILE_BASIC_INFO info_buf;
946 if (attrs->ia_valid & ATTR_ATIME) {
948 info_buf.LastAccessTime =
949 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
951 info_buf.LastAccessTime = 0;
953 if (attrs->ia_valid & ATTR_MTIME) {
955 info_buf.LastWriteTime =
956 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
958 info_buf.LastWriteTime = 0;
961 * Samba throws this field away, but windows may actually use it.
962 * Do not set ctime unless other time stamps are changed explicitly
963 * (i.e. by utimes()) since we would then have a mix of client and
966 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
967 cFYI(1, "CIFS - CTIME changed");
968 info_buf.ChangeTime =
969 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
971 info_buf.ChangeTime = 0;
973 info_buf.CreationTime = 0; /* don't change */
974 info_buf.Attributes = cpu_to_le32(dosattr);
977 * If the file is already open for write, just use that fileid
979 open_file = find_writable_file(cifsInode, true);
981 netfid = open_file->netfid;
982 netpid = open_file->pid;
983 pTcon = tlink_tcon(open_file->tlink);
984 goto set_via_filehandle;
987 tlink = cifs_sb_tlink(cifs_sb);
993 pTcon = tlink_tcon(tlink);
996 * NT4 apparently returns success on this call, but it doesn't
999 if (!(pTcon->ses->flags & CIFS_SES_NT4)) {
1000 rc = CIFSSMBSetPathInfo(xid, pTcon, full_path,
1001 &info_buf, cifs_sb->local_nls,
1002 cifs_sb->mnt_cifs_flags &
1003 CIFS_MOUNT_MAP_SPECIAL_CHR);
1005 cifsInode->cifsAttrs = dosattr;
1007 } else if (rc != -EOPNOTSUPP && rc != -EINVAL)
1011 cFYI(1, "calling SetFileInfo since SetPathInfo for "
1012 "times not supported by this server");
1013 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1014 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1015 CREATE_NOT_DIR, &netfid, &oplock,
1016 NULL, cifs_sb->local_nls,
1017 cifs_sb->mnt_cifs_flags &
1018 CIFS_MOUNT_MAP_SPECIAL_CHR);
1026 netpid = current->tgid;
1029 rc = CIFSSMBSetFileInfo(xid, pTcon, &info_buf, netfid, netpid);
1031 cifsInode->cifsAttrs = dosattr;
1033 if (open_file == NULL)
1034 CIFSSMBClose(xid, pTcon, netfid);
1036 cifsFileInfo_put(open_file);
1039 cifs_put_tlink(tlink);
1044 * open the given file (if it isn't already), set the DELETE_ON_CLOSE bit
1045 * and rename it to a random name that hopefully won't conflict with
1049 cifs_rename_pending_delete(char *full_path, struct dentry *dentry, int xid)
1054 struct inode *inode = dentry->d_inode;
1055 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1056 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1057 struct tcon_link *tlink;
1058 struct cifsTconInfo *tcon;
1059 __u32 dosattr, origattr;
1060 FILE_BASIC_INFO *info_buf = NULL;
1062 tlink = cifs_sb_tlink(cifs_sb);
1064 return PTR_ERR(tlink);
1065 tcon = tlink_tcon(tlink);
1067 rc = CIFSSMBOpen(xid, tcon, full_path, FILE_OPEN,
1068 DELETE|FILE_WRITE_ATTRIBUTES, CREATE_NOT_DIR,
1069 &netfid, &oplock, NULL, cifs_sb->local_nls,
1070 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1074 origattr = cifsInode->cifsAttrs;
1076 origattr |= ATTR_NORMAL;
1078 dosattr = origattr & ~ATTR_READONLY;
1080 dosattr |= ATTR_NORMAL;
1081 dosattr |= ATTR_HIDDEN;
1083 /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */
1084 if (dosattr != origattr) {
1085 info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL);
1086 if (info_buf == NULL) {
1090 info_buf->Attributes = cpu_to_le32(dosattr);
1091 rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid,
1093 /* although we would like to mark the file hidden
1094 if that fails we will still try to rename it */
1096 cifsInode->cifsAttrs = dosattr;
1098 dosattr = origattr; /* since not able to change them */
1101 /* rename the file */
1102 rc = CIFSSMBRenameOpenFile(xid, tcon, netfid, NULL, cifs_sb->local_nls,
1103 cifs_sb->mnt_cifs_flags &
1104 CIFS_MOUNT_MAP_SPECIAL_CHR);
1110 /* try to set DELETE_ON_CLOSE */
1111 if (!cifsInode->delete_pending) {
1112 rc = CIFSSMBSetFileDisposition(xid, tcon, true, netfid,
1115 * some samba versions return -ENOENT when we try to set the
1116 * file disposition here. Likely a samba bug, but work around
1117 * it for now. This means that some cifsXXX files may hang
1118 * around after they shouldn't.
1120 * BB: remove this hack after more servers have the fix
1128 cifsInode->delete_pending = true;
1132 CIFSSMBClose(xid, tcon, netfid);
1135 cifs_put_tlink(tlink);
1139 * reset everything back to the original state. Don't bother
1140 * dealing with errors here since we can't do anything about
1144 CIFSSMBRenameOpenFile(xid, tcon, netfid, dentry->d_name.name,
1145 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
1146 CIFS_MOUNT_MAP_SPECIAL_CHR);
1148 if (dosattr != origattr) {
1149 info_buf->Attributes = cpu_to_le32(origattr);
1150 if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid,
1152 cifsInode->cifsAttrs = origattr;
1160 * If dentry->d_inode is null (usually meaning the cached dentry
1161 * is a negative dentry) then we would attempt a standard SMB delete, but
1162 * if that fails we can not attempt the fall back mechanisms on EACCESS
1163 * but will return the EACCESS to the caller. Note that the VFS does not call
1164 * unlink on negative dentries currently.
1166 int cifs_unlink(struct inode *dir, struct dentry *dentry)
1170 char *full_path = NULL;
1171 struct inode *inode = dentry->d_inode;
1172 struct cifsInodeInfo *cifs_inode;
1173 struct super_block *sb = dir->i_sb;
1174 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1175 struct tcon_link *tlink;
1176 struct cifsTconInfo *tcon;
1177 struct iattr *attrs = NULL;
1178 __u32 dosattr = 0, origattr = 0;
1180 cFYI(1, "cifs_unlink, dir=0x%p, dentry=0x%p", dir, dentry);
1182 tlink = cifs_sb_tlink(cifs_sb);
1184 return PTR_ERR(tlink);
1185 tcon = tlink_tcon(tlink);
1189 /* Unlink can be called from rename so we can not take the
1190 * sb->s_vfs_rename_mutex here */
1191 full_path = build_path_from_dentry(dentry);
1192 if (full_path == NULL) {
1197 if ((tcon->ses->capabilities & CAP_UNIX) &&
1198 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1199 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1200 rc = CIFSPOSIXDelFile(xid, tcon, full_path,
1201 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
1202 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1203 cFYI(1, "posix del rc %d", rc);
1204 if ((rc == 0) || (rc == -ENOENT))
1205 goto psx_del_no_retry;
1209 rc = CIFSSMBDelFile(xid, tcon, full_path, cifs_sb->local_nls,
1210 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1216 } else if (rc == -ENOENT) {
1218 } else if (rc == -ETXTBSY) {
1219 rc = cifs_rename_pending_delete(full_path, dentry, xid);
1222 } else if ((rc == -EACCES) && (dosattr == 0) && inode) {
1223 attrs = kzalloc(sizeof(*attrs), GFP_KERNEL);
1224 if (attrs == NULL) {
1229 /* try to reset dos attributes */
1230 cifs_inode = CIFS_I(inode);
1231 origattr = cifs_inode->cifsAttrs;
1233 origattr |= ATTR_NORMAL;
1234 dosattr = origattr & ~ATTR_READONLY;
1236 dosattr |= ATTR_NORMAL;
1237 dosattr |= ATTR_HIDDEN;
1239 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
1243 goto retry_std_delete;
1246 /* undo the setattr if we errored out and it's needed */
1247 if (rc != 0 && dosattr != 0)
1248 cifs_set_file_info(inode, attrs, xid, full_path, origattr);
1252 cifs_inode = CIFS_I(inode);
1253 cifs_inode->time = 0; /* will force revalidate to get info
1255 inode->i_ctime = current_fs_time(sb);
1257 dir->i_ctime = dir->i_mtime = current_fs_time(sb);
1258 cifs_inode = CIFS_I(dir);
1259 CIFS_I(dir)->time = 0; /* force revalidate of dir as well */
1264 cifs_put_tlink(tlink);
1268 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
1272 struct cifs_sb_info *cifs_sb;
1273 struct tcon_link *tlink;
1274 struct cifsTconInfo *pTcon;
1275 char *full_path = NULL;
1276 struct inode *newinode = NULL;
1277 struct cifs_fattr fattr;
1279 cFYI(1, "In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode);
1281 cifs_sb = CIFS_SB(inode->i_sb);
1282 tlink = cifs_sb_tlink(cifs_sb);
1284 return PTR_ERR(tlink);
1285 pTcon = tlink_tcon(tlink);
1289 full_path = build_path_from_dentry(direntry);
1290 if (full_path == NULL) {
1295 if ((pTcon->ses->capabilities & CAP_UNIX) &&
1296 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1297 le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
1299 FILE_UNIX_BASIC_INFO *pInfo =
1300 kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1301 if (pInfo == NULL) {
1306 mode &= ~current_umask();
1307 rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT,
1308 mode, NULL /* netfid */, pInfo, &oplock,
1309 full_path, cifs_sb->local_nls,
1310 cifs_sb->mnt_cifs_flags &
1311 CIFS_MOUNT_MAP_SPECIAL_CHR);
1312 if (rc == -EOPNOTSUPP) {
1314 goto mkdir_retry_old;
1316 cFYI(1, "posix mkdir returned 0x%x", rc);
1319 if (pInfo->Type == cpu_to_le32(-1)) {
1320 /* no return info, go query for it */
1322 goto mkdir_get_info;
1324 /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
1328 cifs_unix_basic_to_fattr(&fattr, pInfo, cifs_sb);
1329 cifs_fill_uniqueid(inode->i_sb, &fattr);
1330 newinode = cifs_iget(inode->i_sb, &fattr);
1333 goto mkdir_get_info;
1336 d_instantiate(direntry, newinode);
1338 #ifdef CONFIG_CIFS_DEBUG2
1339 cFYI(1, "instantiated dentry %p %s to inode %p",
1340 direntry, direntry->d_name.name, newinode);
1342 if (newinode->i_nlink != 2)
1343 cFYI(1, "unexpected number of links %d",
1351 /* BB add setting the equivalent of mode via CreateX w/ACLs */
1352 rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
1353 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1355 cFYI(1, "cifs_mkdir returned 0x%x", rc);
1360 if (pTcon->unix_ext)
1361 rc = cifs_get_inode_info_unix(&newinode, full_path,
1364 rc = cifs_get_inode_info(&newinode, full_path, NULL,
1365 inode->i_sb, xid, NULL);
1367 d_instantiate(direntry, newinode);
1368 /* setting nlink not necessary except in cases where we
1369 * failed to get it from the server or was set bogus */
1370 if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
1371 direntry->d_inode->i_nlink = 2;
1373 mode &= ~current_umask();
1374 /* must turn on setgid bit if parent dir has it */
1375 if (inode->i_mode & S_ISGID)
1378 if (pTcon->unix_ext) {
1379 struct cifs_unix_set_info_args args = {
1381 .ctime = NO_CHANGE_64,
1382 .atime = NO_CHANGE_64,
1383 .mtime = NO_CHANGE_64,
1386 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1387 args.uid = (__u64)current_fsuid();
1388 if (inode->i_mode & S_ISGID)
1389 args.gid = (__u64)inode->i_gid;
1391 args.gid = (__u64)current_fsgid();
1393 args.uid = NO_CHANGE_64;
1394 args.gid = NO_CHANGE_64;
1396 CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, &args,
1398 cifs_sb->mnt_cifs_flags &
1399 CIFS_MOUNT_MAP_SPECIAL_CHR);
1401 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
1402 (mode & S_IWUGO) == 0) {
1403 FILE_BASIC_INFO pInfo;
1404 struct cifsInodeInfo *cifsInode;
1407 memset(&pInfo, 0, sizeof(pInfo));
1408 cifsInode = CIFS_I(newinode);
1409 dosattrs = cifsInode->cifsAttrs|ATTR_READONLY;
1410 pInfo.Attributes = cpu_to_le32(dosattrs);
1411 tmprc = CIFSSMBSetPathInfo(xid, pTcon,
1414 cifs_sb->mnt_cifs_flags &
1415 CIFS_MOUNT_MAP_SPECIAL_CHR);
1417 cifsInode->cifsAttrs = dosattrs;
1419 if (direntry->d_inode) {
1420 if (cifs_sb->mnt_cifs_flags &
1422 direntry->d_inode->i_mode =
1425 if (cifs_sb->mnt_cifs_flags &
1426 CIFS_MOUNT_SET_UID) {
1427 direntry->d_inode->i_uid =
1429 if (inode->i_mode & S_ISGID)
1430 direntry->d_inode->i_gid =
1433 direntry->d_inode->i_gid =
1442 cifs_put_tlink(tlink);
1446 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1450 struct cifs_sb_info *cifs_sb;
1451 struct tcon_link *tlink;
1452 struct cifsTconInfo *pTcon;
1453 char *full_path = NULL;
1454 struct cifsInodeInfo *cifsInode;
1456 cFYI(1, "cifs_rmdir, inode = 0x%p", inode);
1460 full_path = build_path_from_dentry(direntry);
1461 if (full_path == NULL) {
1466 cifs_sb = CIFS_SB(inode->i_sb);
1467 tlink = cifs_sb_tlink(cifs_sb);
1468 if (IS_ERR(tlink)) {
1469 rc = PTR_ERR(tlink);
1472 pTcon = tlink_tcon(tlink);
1474 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1475 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1476 cifs_put_tlink(tlink);
1480 spin_lock(&direntry->d_inode->i_lock);
1481 i_size_write(direntry->d_inode, 0);
1482 clear_nlink(direntry->d_inode);
1483 spin_unlock(&direntry->d_inode->i_lock);
1486 cifsInode = CIFS_I(direntry->d_inode);
1487 cifsInode->time = 0; /* force revalidate to go get info when
1490 cifsInode = CIFS_I(inode);
1491 cifsInode->time = 0; /* force revalidate to get parent dir info
1492 since cached search results now invalid */
1494 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1495 current_fs_time(inode->i_sb);
1504 cifs_do_rename(int xid, struct dentry *from_dentry, const char *fromPath,
1505 struct dentry *to_dentry, const char *toPath)
1507 struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb);
1508 struct tcon_link *tlink;
1509 struct cifsTconInfo *pTcon;
1513 tlink = cifs_sb_tlink(cifs_sb);
1515 return PTR_ERR(tlink);
1516 pTcon = tlink_tcon(tlink);
1518 /* try path-based rename first */
1519 rc = CIFSSMBRename(xid, pTcon, fromPath, toPath, cifs_sb->local_nls,
1520 cifs_sb->mnt_cifs_flags &
1521 CIFS_MOUNT_MAP_SPECIAL_CHR);
1524 * don't bother with rename by filehandle unless file is busy and
1525 * source Note that cross directory moves do not work with
1526 * rename by filehandle to various Windows servers.
1528 if (rc == 0 || rc != -ETXTBSY)
1529 goto do_rename_exit;
1531 /* open-file renames don't work across directories */
1532 if (to_dentry->d_parent != from_dentry->d_parent)
1533 goto do_rename_exit;
1535 /* open the file to be renamed -- we need DELETE perms */
1536 rc = CIFSSMBOpen(xid, pTcon, fromPath, FILE_OPEN, DELETE,
1537 CREATE_NOT_DIR, &srcfid, &oplock, NULL,
1538 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
1539 CIFS_MOUNT_MAP_SPECIAL_CHR);
1542 rc = CIFSSMBRenameOpenFile(xid, pTcon, srcfid,
1543 (const char *) to_dentry->d_name.name,
1544 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
1545 CIFS_MOUNT_MAP_SPECIAL_CHR);
1547 CIFSSMBClose(xid, pTcon, srcfid);
1550 cifs_put_tlink(tlink);
1554 int cifs_rename(struct inode *source_dir, struct dentry *source_dentry,
1555 struct inode *target_dir, struct dentry *target_dentry)
1557 char *fromName = NULL;
1558 char *toName = NULL;
1559 struct cifs_sb_info *cifs_sb;
1560 struct tcon_link *tlink;
1561 struct cifsTconInfo *tcon;
1562 FILE_UNIX_BASIC_INFO *info_buf_source = NULL;
1563 FILE_UNIX_BASIC_INFO *info_buf_target;
1566 cifs_sb = CIFS_SB(source_dir->i_sb);
1567 tlink = cifs_sb_tlink(cifs_sb);
1569 return PTR_ERR(tlink);
1570 tcon = tlink_tcon(tlink);
1575 * we already have the rename sem so we do not need to
1576 * grab it again here to protect the path integrity
1578 fromName = build_path_from_dentry(source_dentry);
1579 if (fromName == NULL) {
1581 goto cifs_rename_exit;
1584 toName = build_path_from_dentry(target_dentry);
1585 if (toName == NULL) {
1587 goto cifs_rename_exit;
1590 rc = cifs_do_rename(xid, source_dentry, fromName,
1591 target_dentry, toName);
1593 if (rc == -EEXIST && tcon->unix_ext) {
1595 * Are src and dst hardlinks of same inode? We can
1596 * only tell with unix extensions enabled
1599 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO),
1601 if (info_buf_source == NULL) {
1603 goto cifs_rename_exit;
1606 info_buf_target = info_buf_source + 1;
1607 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, fromName,
1610 cifs_sb->mnt_cifs_flags &
1611 CIFS_MOUNT_MAP_SPECIAL_CHR);
1615 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, toName,
1618 cifs_sb->mnt_cifs_flags &
1619 CIFS_MOUNT_MAP_SPECIAL_CHR);
1621 if (tmprc == 0 && (info_buf_source->UniqueId ==
1622 info_buf_target->UniqueId)) {
1623 /* same file, POSIX says that this is a noop */
1625 goto cifs_rename_exit;
1627 } /* else ... BB we could add the same check for Windows by
1628 checking the UniqueId via FILE_INTERNAL_INFO */
1631 /* Try unlinking the target dentry if it's not negative */
1632 if (target_dentry->d_inode && (rc == -EACCES || rc == -EEXIST)) {
1633 tmprc = cifs_unlink(target_dir, target_dentry);
1635 goto cifs_rename_exit;
1637 rc = cifs_do_rename(xid, source_dentry, fromName,
1638 target_dentry, toName);
1642 kfree(info_buf_source);
1646 cifs_put_tlink(tlink);
1651 cifs_inode_needs_reval(struct inode *inode)
1653 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
1654 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1656 if (cifs_i->clientCanCacheRead)
1659 if (!lookupCacheEnabled)
1662 if (cifs_i->time == 0)
1665 if (!time_in_range(jiffies, cifs_i->time,
1666 cifs_i->time + cifs_sb->actimeo))
1669 /* hardlinked files w/ noserverino get "special" treatment */
1670 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) &&
1671 S_ISREG(inode->i_mode) && inode->i_nlink != 1)
1678 * Zap the cache. Called when invalid_mapping flag is set.
1681 cifs_invalidate_mapping(struct inode *inode)
1684 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
1686 cifs_i->invalid_mapping = false;
1688 /* write back any cached data */
1689 if (inode->i_mapping && inode->i_mapping->nrpages != 0) {
1690 rc = filemap_write_and_wait(inode->i_mapping);
1691 mapping_set_error(inode->i_mapping, rc);
1693 invalidate_remote_inode(inode);
1694 cifs_fscache_reset_inode_cookie(inode);
1697 int cifs_revalidate_file(struct file *filp)
1700 struct inode *inode = filp->f_path.dentry->d_inode;
1701 struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data;
1703 if (!cifs_inode_needs_reval(inode))
1706 if (tlink_tcon(cfile->tlink)->unix_ext)
1707 rc = cifs_get_file_info_unix(filp);
1709 rc = cifs_get_file_info(filp);
1712 if (CIFS_I(inode)->invalid_mapping)
1713 cifs_invalidate_mapping(inode);
1718 /* revalidate a dentry's inode attributes */
1719 int cifs_revalidate_dentry(struct dentry *dentry)
1723 char *full_path = NULL;
1724 struct inode *inode = dentry->d_inode;
1725 struct super_block *sb = dentry->d_sb;
1732 if (!cifs_inode_needs_reval(inode))
1735 /* can not safely grab the rename sem here if rename calls revalidate
1736 since that would deadlock */
1737 full_path = build_path_from_dentry(dentry);
1738 if (full_path == NULL) {
1743 cFYI(1, "Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1744 "jiffies %ld", full_path, inode, inode->i_count.counter,
1745 dentry, dentry->d_time, jiffies);
1747 if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext)
1748 rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid);
1750 rc = cifs_get_inode_info(&inode, full_path, NULL, sb,
1754 if (CIFS_I(inode)->invalid_mapping)
1755 cifs_invalidate_mapping(inode);
1762 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1765 struct cifs_sb_info *cifs_sb = CIFS_SB(dentry->d_sb);
1766 struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb);
1767 int err = cifs_revalidate_dentry(dentry);
1770 generic_fillattr(dentry->d_inode, stat);
1771 stat->blksize = CIFS_MAX_MSGSIZE;
1772 stat->ino = CIFS_I(dentry->d_inode)->uniqueid;
1775 * If on a multiuser mount without unix extensions, and the
1776 * admin hasn't overridden them, set the ownership to the
1777 * fsuid/fsgid of the current process.
1779 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) &&
1781 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID))
1782 stat->uid = current_fsuid();
1783 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID))
1784 stat->gid = current_fsgid();
1790 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1792 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1793 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1797 page = grab_cache_page(mapping, index);
1801 zero_user_segment(page, offset, PAGE_CACHE_SIZE);
1803 page_cache_release(page);
1807 static void cifs_setsize(struct inode *inode, loff_t offset)
1811 spin_lock(&inode->i_lock);
1812 oldsize = inode->i_size;
1813 i_size_write(inode, offset);
1814 spin_unlock(&inode->i_lock);
1816 truncate_pagecache(inode, oldsize, offset);
1820 cifs_set_file_size(struct inode *inode, struct iattr *attrs,
1821 int xid, char *full_path)
1824 struct cifsFileInfo *open_file;
1825 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1826 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1827 struct tcon_link *tlink = NULL;
1828 struct cifsTconInfo *pTcon = NULL;
1831 * To avoid spurious oplock breaks from server, in the case of
1832 * inodes that we already have open, avoid doing path based
1833 * setting of file size if we can do it by handle.
1834 * This keeps our caching token (oplock) and avoids timeouts
1835 * when the local oplock break takes longer to flush
1836 * writebehind data than the SMB timeout for the SetPathInfo
1837 * request would allow
1839 open_file = find_writable_file(cifsInode, true);
1841 __u16 nfid = open_file->netfid;
1842 __u32 npid = open_file->pid;
1843 pTcon = tlink_tcon(open_file->tlink);
1844 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size, nfid,
1846 cifsFileInfo_put(open_file);
1847 cFYI(1, "SetFSize for attrs rc = %d", rc);
1848 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1849 unsigned int bytes_written;
1850 rc = CIFSSMBWrite(xid, pTcon, nfid, 0, attrs->ia_size,
1851 &bytes_written, NULL, NULL, 1);
1852 cFYI(1, "Wrt seteof rc %d", rc);
1858 if (pTcon == NULL) {
1859 tlink = cifs_sb_tlink(cifs_sb);
1861 return PTR_ERR(tlink);
1862 pTcon = tlink_tcon(tlink);
1865 /* Set file size by pathname rather than by handle
1866 either because no valid, writeable file handle for
1867 it was found or because there was an error setting
1869 rc = CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size,
1870 false, cifs_sb->local_nls,
1871 cifs_sb->mnt_cifs_flags &
1872 CIFS_MOUNT_MAP_SPECIAL_CHR);
1873 cFYI(1, "SetEOF by path (setattrs) rc = %d", rc);
1874 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1878 rc = SMBLegacyOpen(xid, pTcon, full_path,
1879 FILE_OPEN, GENERIC_WRITE,
1880 CREATE_NOT_DIR, &netfid, &oplock, NULL,
1882 cifs_sb->mnt_cifs_flags &
1883 CIFS_MOUNT_MAP_SPECIAL_CHR);
1885 unsigned int bytes_written;
1886 rc = CIFSSMBWrite(xid, pTcon, netfid, 0,
1888 &bytes_written, NULL,
1890 cFYI(1, "wrt seteof rc %d", rc);
1891 CIFSSMBClose(xid, pTcon, netfid);
1895 cifs_put_tlink(tlink);
1899 cifsInode->server_eof = attrs->ia_size;
1900 cifs_setsize(inode, attrs->ia_size);
1901 cifs_truncate_page(inode->i_mapping, inode->i_size);
1908 cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
1912 char *full_path = NULL;
1913 struct inode *inode = direntry->d_inode;
1914 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1915 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1916 struct tcon_link *tlink;
1917 struct cifsTconInfo *pTcon;
1918 struct cifs_unix_set_info_args *args = NULL;
1919 struct cifsFileInfo *open_file;
1921 cFYI(1, "setattr_unix on file %s attrs->ia_valid=0x%x",
1922 direntry->d_name.name, attrs->ia_valid);
1926 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
1927 attrs->ia_valid |= ATTR_FORCE;
1929 rc = inode_change_ok(inode, attrs);
1933 full_path = build_path_from_dentry(direntry);
1934 if (full_path == NULL) {
1940 * Attempt to flush data before changing attributes. We need to do
1941 * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the
1942 * ownership or mode then we may also need to do this. Here, we take
1943 * the safe way out and just do the flush on all setattr requests. If
1944 * the flush returns error, store it to report later and continue.
1946 * BB: This should be smarter. Why bother flushing pages that
1947 * will be truncated anyway? Also, should we error out here if
1948 * the flush returns error?
1950 rc = filemap_write_and_wait(inode->i_mapping);
1951 mapping_set_error(inode->i_mapping, rc);
1954 if (attrs->ia_valid & ATTR_SIZE) {
1955 rc = cifs_set_file_size(inode, attrs, xid, full_path);
1960 /* skip mode change if it's just for clearing setuid/setgid */
1961 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1962 attrs->ia_valid &= ~ATTR_MODE;
1964 args = kmalloc(sizeof(*args), GFP_KERNEL);
1970 /* set up the struct */
1971 if (attrs->ia_valid & ATTR_MODE)
1972 args->mode = attrs->ia_mode;
1974 args->mode = NO_CHANGE_64;
1976 if (attrs->ia_valid & ATTR_UID)
1977 args->uid = attrs->ia_uid;
1979 args->uid = NO_CHANGE_64;
1981 if (attrs->ia_valid & ATTR_GID)
1982 args->gid = attrs->ia_gid;
1984 args->gid = NO_CHANGE_64;
1986 if (attrs->ia_valid & ATTR_ATIME)
1987 args->atime = cifs_UnixTimeToNT(attrs->ia_atime);
1989 args->atime = NO_CHANGE_64;
1991 if (attrs->ia_valid & ATTR_MTIME)
1992 args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime);
1994 args->mtime = NO_CHANGE_64;
1996 if (attrs->ia_valid & ATTR_CTIME)
1997 args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime);
1999 args->ctime = NO_CHANGE_64;
2002 open_file = find_writable_file(cifsInode, true);
2004 u16 nfid = open_file->netfid;
2005 u32 npid = open_file->pid;
2006 pTcon = tlink_tcon(open_file->tlink);
2007 rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid);
2008 cifsFileInfo_put(open_file);
2010 tlink = cifs_sb_tlink(cifs_sb);
2011 if (IS_ERR(tlink)) {
2012 rc = PTR_ERR(tlink);
2015 pTcon = tlink_tcon(tlink);
2016 rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args,
2018 cifs_sb->mnt_cifs_flags &
2019 CIFS_MOUNT_MAP_SPECIAL_CHR);
2020 cifs_put_tlink(tlink);
2026 if ((attrs->ia_valid & ATTR_SIZE) &&
2027 attrs->ia_size != i_size_read(inode))
2028 truncate_setsize(inode, attrs->ia_size);
2030 setattr_copy(inode, attrs);
2031 mark_inode_dirty(inode);
2033 /* force revalidate when any of these times are set since some
2034 of the fs types (eg ext3, fat) do not have fine enough
2035 time granularity to match protocol, and we do not have a
2036 a way (yet) to query the server fs's time granularity (and
2037 whether it rounds times down).
2039 if (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME))
2040 cifsInode->time = 0;
2049 cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
2052 struct inode *inode = direntry->d_inode;
2053 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2054 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2055 char *full_path = NULL;
2058 __u64 mode = NO_CHANGE_64;
2062 cFYI(1, "setattr on file %s attrs->iavalid 0x%x",
2063 direntry->d_name.name, attrs->ia_valid);
2065 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
2066 attrs->ia_valid |= ATTR_FORCE;
2068 rc = inode_change_ok(inode, attrs);
2074 full_path = build_path_from_dentry(direntry);
2075 if (full_path == NULL) {
2082 * Attempt to flush data before changing attributes. We need to do
2083 * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the
2084 * ownership or mode then we may also need to do this. Here, we take
2085 * the safe way out and just do the flush on all setattr requests. If
2086 * the flush returns error, store it to report later and continue.
2088 * BB: This should be smarter. Why bother flushing pages that
2089 * will be truncated anyway? Also, should we error out here if
2090 * the flush returns error?
2092 rc = filemap_write_and_wait(inode->i_mapping);
2093 mapping_set_error(inode->i_mapping, rc);
2096 if (attrs->ia_valid & ATTR_SIZE) {
2097 rc = cifs_set_file_size(inode, attrs, xid, full_path);
2099 goto cifs_setattr_exit;
2103 * Without unix extensions we can't send ownership changes to the
2104 * server, so silently ignore them. This is consistent with how
2105 * local DOS/Windows filesystems behave (VFAT, NTFS, etc). With
2106 * CIFSACL support + proper Windows to Unix idmapping, we may be
2107 * able to support this in the future.
2109 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID))
2110 attrs->ia_valid &= ~(ATTR_UID | ATTR_GID);
2112 /* skip mode change if it's just for clearing setuid/setgid */
2113 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
2114 attrs->ia_valid &= ~ATTR_MODE;
2116 if (attrs->ia_valid & ATTR_MODE) {
2117 cFYI(1, "Mode changed to 0%o", attrs->ia_mode);
2118 mode = attrs->ia_mode;
2121 if (attrs->ia_valid & ATTR_MODE) {
2123 #ifdef CONFIG_CIFS_ACL
2124 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
2125 rc = mode_to_cifs_acl(inode, full_path, mode);
2127 cFYI(1, "%s: Setting ACL failed with error: %d",
2129 goto cifs_setattr_exit;
2132 #endif /* CONFIG_CIFS_ACL */
2133 if (((mode & S_IWUGO) == 0) &&
2134 (cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
2136 dosattr = cifsInode->cifsAttrs | ATTR_READONLY;
2138 /* fix up mode if we're not using dynperm */
2139 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
2140 attrs->ia_mode = inode->i_mode & ~S_IWUGO;
2141 } else if ((mode & S_IWUGO) &&
2142 (cifsInode->cifsAttrs & ATTR_READONLY)) {
2144 dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
2145 /* Attributes of 0 are ignored */
2147 dosattr |= ATTR_NORMAL;
2149 /* reset local inode permissions to normal */
2150 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2151 attrs->ia_mode &= ~(S_IALLUGO);
2152 if (S_ISDIR(inode->i_mode))
2154 cifs_sb->mnt_dir_mode;
2157 cifs_sb->mnt_file_mode;
2159 } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2160 /* ignore mode change - ATTR_READONLY hasn't changed */
2161 attrs->ia_valid &= ~ATTR_MODE;
2165 if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) ||
2166 ((attrs->ia_valid & ATTR_MODE) && dosattr)) {
2167 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
2168 /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */
2170 /* Even if error on time set, no sense failing the call if
2171 the server would set the time to a reasonable value anyway,
2172 and this check ensures that we are not being called from
2173 sys_utimes in which case we ought to fail the call back to
2174 the user when the server rejects the call */
2175 if ((rc) && (attrs->ia_valid &
2176 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
2180 /* do not need local check to inode_check_ok since the server does
2183 goto cifs_setattr_exit;
2185 if ((attrs->ia_valid & ATTR_SIZE) &&
2186 attrs->ia_size != i_size_read(inode))
2187 truncate_setsize(inode, attrs->ia_size);
2189 setattr_copy(inode, attrs);
2190 mark_inode_dirty(inode);
2199 cifs_setattr(struct dentry *direntry, struct iattr *attrs)
2201 struct inode *inode = direntry->d_inode;
2202 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2203 struct cifsTconInfo *pTcon = cifs_sb_master_tcon(cifs_sb);
2205 if (pTcon->unix_ext)
2206 return cifs_setattr_unix(direntry, attrs);
2208 return cifs_setattr_nounix(direntry, attrs);
2210 /* BB: add cifs_setattr_legacy for really old servers */
2214 void cifs_delete_inode(struct inode *inode)
2216 cFYI(1, "In cifs_delete_inode, inode = 0x%p", inode);
2217 /* may have to add back in if and when safe distributed caching of
2218 directories added e.g. via FindNotify */