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->tcon->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 cifsTconInfo *tcon = cifs_sb->tcon;
292 struct cifsFileInfo *cfile = filp->private_data;
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 cifs_sb_info *cifs_sb = CIFS_SB(sb);
318 tcon = cifs_sb->tcon;
319 cFYI(1, "Getting info on %s", full_path);
321 /* could have done a find first instead but this returns more info */
322 rc = CIFSSMBUnixQPathInfo(xid, tcon, full_path, &find_data,
323 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
324 CIFS_MOUNT_MAP_SPECIAL_CHR);
327 cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb);
328 } else if (rc == -EREMOTE) {
329 cifs_create_dfs_fattr(&fattr, sb);
335 if (*pinode == NULL) {
337 cifs_fill_uniqueid(sb, &fattr);
338 *pinode = cifs_iget(sb, &fattr);
342 /* we already have inode, update it */
343 cifs_fattr_to_inode(*pinode, &fattr);
350 cifs_sfu_type(struct cifs_fattr *fattr, const unsigned char *path,
351 struct cifs_sb_info *cifs_sb, int xid)
356 struct cifsTconInfo *pTcon = cifs_sb->tcon;
358 unsigned int bytes_read;
363 fattr->cf_mode &= ~S_IFMT;
365 if (fattr->cf_eof == 0) {
366 fattr->cf_mode |= S_IFIFO;
367 fattr->cf_dtype = DT_FIFO;
369 } else if (fattr->cf_eof < 8) {
370 fattr->cf_mode |= S_IFREG;
371 fattr->cf_dtype = DT_REG;
372 return -EINVAL; /* EOPNOTSUPP? */
375 rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ,
376 CREATE_NOT_DIR, &netfid, &oplock, NULL,
378 cifs_sb->mnt_cifs_flags &
379 CIFS_MOUNT_MAP_SPECIAL_CHR);
381 int buf_type = CIFS_NO_BUFFER;
383 rc = CIFSSMBRead(xid, pTcon, netfid,
384 24 /* length */, 0 /* offset */,
385 &bytes_read, &pbuf, &buf_type);
386 if ((rc == 0) && (bytes_read >= 8)) {
387 if (memcmp("IntxBLK", pbuf, 8) == 0) {
388 cFYI(1, "Block device");
389 fattr->cf_mode |= S_IFBLK;
390 fattr->cf_dtype = DT_BLK;
391 if (bytes_read == 24) {
392 /* we have enough to decode dev num */
393 __u64 mjr; /* major */
394 __u64 mnr; /* minor */
395 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
396 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
397 fattr->cf_rdev = MKDEV(mjr, mnr);
399 } else if (memcmp("IntxCHR", pbuf, 8) == 0) {
400 cFYI(1, "Char device");
401 fattr->cf_mode |= S_IFCHR;
402 fattr->cf_dtype = DT_CHR;
403 if (bytes_read == 24) {
404 /* we have enough to decode dev num */
405 __u64 mjr; /* major */
406 __u64 mnr; /* minor */
407 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
408 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
409 fattr->cf_rdev = MKDEV(mjr, mnr);
411 } else if (memcmp("IntxLNK", pbuf, 7) == 0) {
413 fattr->cf_mode |= S_IFLNK;
414 fattr->cf_dtype = DT_LNK;
416 fattr->cf_mode |= S_IFREG; /* file? */
417 fattr->cf_dtype = DT_REG;
421 fattr->cf_mode |= S_IFREG; /* then it is a file */
422 fattr->cf_dtype = DT_REG;
423 rc = -EOPNOTSUPP; /* or some unknown SFU type */
425 CIFSSMBClose(xid, pTcon, netfid);
430 #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
433 * Fetch mode bits as provided by SFU.
435 * FIXME: Doesn't this clobber the type bit we got from cifs_sfu_type ?
437 static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path,
438 struct cifs_sb_info *cifs_sb, int xid)
440 #ifdef CONFIG_CIFS_XATTR
445 rc = CIFSSMBQAllEAs(xid, cifs_sb->tcon, path, "SETFILEBITS",
446 ea_value, 4 /* size of buf */, cifs_sb->local_nls,
447 cifs_sb->mnt_cifs_flags &
448 CIFS_MOUNT_MAP_SPECIAL_CHR);
452 mode = le32_to_cpu(*((__le32 *)ea_value));
453 fattr->cf_mode &= ~SFBITS_MASK;
454 cFYI(1, "special bits 0%o org mode 0%o", mode,
456 fattr->cf_mode = (mode & SFBITS_MASK) | fattr->cf_mode;
457 cFYI(1, "special mode bits 0%o", mode);
466 /* Fill a cifs_fattr struct with info from FILE_ALL_INFO */
468 cifs_all_info_to_fattr(struct cifs_fattr *fattr, FILE_ALL_INFO *info,
469 struct cifs_sb_info *cifs_sb, bool adjust_tz)
471 memset(fattr, 0, sizeof(*fattr));
472 fattr->cf_cifsattrs = le32_to_cpu(info->Attributes);
473 if (info->DeletePending)
474 fattr->cf_flags |= CIFS_FATTR_DELETE_PENDING;
476 if (info->LastAccessTime)
477 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
479 fattr->cf_atime = CURRENT_TIME;
481 fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime);
482 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);
485 fattr->cf_ctime.tv_sec += cifs_sb->tcon->ses->server->timeAdj;
486 fattr->cf_mtime.tv_sec += cifs_sb->tcon->ses->server->timeAdj;
489 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
490 fattr->cf_bytes = le64_to_cpu(info->AllocationSize);
492 if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
493 fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode;
494 fattr->cf_dtype = DT_DIR;
496 fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode;
497 fattr->cf_dtype = DT_REG;
499 /* clear write bits if ATTR_READONLY is set */
500 if (fattr->cf_cifsattrs & ATTR_READONLY)
501 fattr->cf_mode &= ~(S_IWUGO);
504 fattr->cf_nlink = le32_to_cpu(info->NumberOfLinks);
506 fattr->cf_uid = cifs_sb->mnt_uid;
507 fattr->cf_gid = cifs_sb->mnt_gid;
510 int cifs_get_file_info(struct file *filp)
514 FILE_ALL_INFO find_data;
515 struct cifs_fattr fattr;
516 struct inode *inode = filp->f_path.dentry->d_inode;
517 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
518 struct cifsTconInfo *tcon = cifs_sb->tcon;
519 struct cifsFileInfo *cfile = filp->private_data;
522 rc = CIFSSMBQFileInfo(xid, tcon, cfile->netfid, &find_data);
523 if (rc == -EOPNOTSUPP || rc == -EINVAL) {
525 * FIXME: legacy server -- fall back to path-based call?
526 * for now, just skip revalidating and mark inode for
530 CIFS_I(inode)->time = 0;
532 } else if (rc == -EREMOTE) {
533 cifs_create_dfs_fattr(&fattr, inode->i_sb);
539 * don't bother with SFU junk here -- just mark inode as needing
542 cifs_all_info_to_fattr(&fattr, &find_data, cifs_sb, false);
543 fattr.cf_uniqueid = CIFS_I(inode)->uniqueid;
544 fattr.cf_flags |= CIFS_FATTR_NEED_REVAL;
545 cifs_fattr_to_inode(inode, &fattr);
551 int cifs_get_inode_info(struct inode **pinode,
552 const unsigned char *full_path, FILE_ALL_INFO *pfindData,
553 struct super_block *sb, int xid, const __u16 *pfid)
556 struct cifsTconInfo *pTcon;
557 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
559 bool adjustTZ = false;
560 struct cifs_fattr fattr;
562 pTcon = cifs_sb->tcon;
563 cFYI(1, "Getting info on %s", full_path);
565 if ((pfindData == NULL) && (*pinode != NULL)) {
566 if (CIFS_I(*pinode)->clientCanCacheRead) {
567 cFYI(1, "No need to revalidate cached inode sizes");
572 /* if file info not passed in then get it from server */
573 if (pfindData == NULL) {
574 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
577 pfindData = (FILE_ALL_INFO *)buf;
579 /* could do find first instead but this returns more info */
580 rc = CIFSSMBQPathInfo(xid, pTcon, full_path, pfindData,
582 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
583 CIFS_MOUNT_MAP_SPECIAL_CHR);
584 /* BB optimize code so we do not make the above call
585 when server claims no NT SMB support and the above call
586 failed at least once - set flag in tcon or mount */
587 if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
588 rc = SMBQueryInformation(xid, pTcon, full_path,
589 pfindData, cifs_sb->local_nls,
590 cifs_sb->mnt_cifs_flags &
591 CIFS_MOUNT_MAP_SPECIAL_CHR);
597 cifs_all_info_to_fattr(&fattr, (FILE_ALL_INFO *) pfindData,
599 } else if (rc == -EREMOTE) {
600 cifs_create_dfs_fattr(&fattr, sb);
607 * If an inode wasn't passed in, then get the inode number
609 * Is an i_ino of zero legal? Can we use that to check if the server
610 * supports returning inode numbers? Are there other sanity checks we
611 * can use to ensure that the server is really filling in that field?
613 * We can not use the IndexNumber field by default from Windows or
614 * Samba (in ALL_INFO buf) but we can request it explicitly. The SNIA
615 * CIFS spec claims that this value is unique within the scope of a
616 * share, and the windows docs hint that it's actually unique
619 * There may be higher info levels that work but are there Windows
620 * server or network appliances for which IndexNumber field is not
623 if (*pinode == NULL) {
624 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
627 rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
628 full_path, &fattr.cf_uniqueid,
630 cifs_sb->mnt_cifs_flags &
631 CIFS_MOUNT_MAP_SPECIAL_CHR);
632 if (rc1 || !fattr.cf_uniqueid) {
633 cFYI(1, "GetSrvInodeNum rc %d", rc1);
634 fattr.cf_uniqueid = iunique(sb, ROOT_I);
635 cifs_autodisable_serverino(cifs_sb);
638 fattr.cf_uniqueid = iunique(sb, ROOT_I);
641 fattr.cf_uniqueid = CIFS_I(*pinode)->uniqueid;
644 /* query for SFU type info if supported and needed */
645 if (fattr.cf_cifsattrs & ATTR_SYSTEM &&
646 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
647 tmprc = cifs_sfu_type(&fattr, full_path, cifs_sb, xid);
649 cFYI(1, "cifs_sfu_type failed: %d", tmprc);
652 #ifdef CONFIG_CIFS_EXPERIMENTAL
653 /* fill in 0777 bits from ACL */
654 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
655 cFYI(1, "Getting mode bits from ACL");
656 cifs_acl_to_fattr(cifs_sb, &fattr, *pinode, full_path, pfid);
660 /* fill in remaining high mode bits e.g. SUID, VTX */
661 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
662 cifs_sfu_mode(&fattr, full_path, cifs_sb, xid);
665 *pinode = cifs_iget(sb, &fattr);
669 cifs_fattr_to_inode(*pinode, &fattr);
677 static const struct inode_operations cifs_ipc_inode_ops = {
678 .lookup = cifs_lookup,
681 char *cifs_build_path_to_root(struct cifs_sb_info *cifs_sb)
683 int pplen = cifs_sb->prepathlen;
685 char *full_path = NULL;
687 /* if no prefix path, simply set path to the root of share to "" */
689 full_path = kmalloc(1, GFP_KERNEL);
695 if (cifs_sb->tcon && (cifs_sb->tcon->Flags & SMB_SHARE_IS_IN_DFS))
696 dfsplen = strnlen(cifs_sb->tcon->treeName, MAX_TREE_SIZE + 1);
700 full_path = kmalloc(dfsplen + pplen + 1, GFP_KERNEL);
701 if (full_path == NULL)
705 strncpy(full_path, cifs_sb->tcon->treeName, dfsplen);
706 /* switch slash direction in prepath depending on whether
707 * windows or posix style path names
709 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) {
711 for (i = 0; i < dfsplen; i++) {
712 if (full_path[i] == '\\')
717 strncpy(full_path + dfsplen, cifs_sb->prepath, pplen);
718 full_path[dfsplen + pplen] = 0; /* add trailing null */
723 cifs_find_inode(struct inode *inode, void *opaque)
725 struct cifs_fattr *fattr = (struct cifs_fattr *) opaque;
727 /* don't match inode with different uniqueid */
728 if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid)
731 /* don't match inode of different type */
732 if ((inode->i_mode & S_IFMT) != (fattr->cf_mode & S_IFMT))
735 /* if it's not a directory or has no dentries, then flag it */
736 if (S_ISDIR(inode->i_mode) && !list_empty(&inode->i_dentry))
737 fattr->cf_flags |= CIFS_FATTR_INO_COLLISION;
743 cifs_init_inode(struct inode *inode, void *opaque)
745 struct cifs_fattr *fattr = (struct cifs_fattr *) opaque;
747 CIFS_I(inode)->uniqueid = fattr->cf_uniqueid;
752 * walk dentry list for an inode and report whether it has aliases that
753 * are hashed. We use this to determine if a directory inode can actually
757 inode_has_hashed_dentries(struct inode *inode)
759 struct dentry *dentry;
761 spin_lock(&dcache_lock);
762 list_for_each_entry(dentry, &inode->i_dentry, d_alias) {
763 if (!d_unhashed(dentry) || IS_ROOT(dentry)) {
764 spin_unlock(&dcache_lock);
768 spin_unlock(&dcache_lock);
772 /* Given fattrs, get a corresponding inode */
774 cifs_iget(struct super_block *sb, struct cifs_fattr *fattr)
780 cFYI(1, "looking for uniqueid=%llu", fattr->cf_uniqueid);
782 /* hash down to 32-bits on 32-bit arch */
783 hash = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid);
785 inode = iget5_locked(sb, hash, cifs_find_inode, cifs_init_inode, fattr);
787 /* was there a potentially problematic inode collision? */
788 if (fattr->cf_flags & CIFS_FATTR_INO_COLLISION) {
789 fattr->cf_flags &= ~CIFS_FATTR_INO_COLLISION;
791 if (inode_has_hashed_dentries(inode)) {
792 cifs_autodisable_serverino(CIFS_SB(sb));
794 fattr->cf_uniqueid = iunique(sb, ROOT_I);
795 goto retry_iget5_locked;
799 cifs_fattr_to_inode(inode, fattr);
800 if (sb->s_flags & MS_NOATIME)
801 inode->i_flags |= S_NOATIME | S_NOCMTIME;
802 if (inode->i_state & I_NEW) {
804 #ifdef CONFIG_CIFS_FSCACHE
805 /* initialize per-inode cache cookie pointer */
806 CIFS_I(inode)->fscache = NULL;
808 unlock_new_inode(inode);
815 /* gets root inode */
816 struct inode *cifs_root_iget(struct super_block *sb, unsigned long ino)
819 struct cifs_sb_info *cifs_sb;
820 struct inode *inode = NULL;
824 cifs_sb = CIFS_SB(sb);
825 full_path = cifs_build_path_to_root(cifs_sb);
826 if (full_path == NULL)
827 return ERR_PTR(-ENOMEM);
830 if (cifs_sb->tcon->unix_ext)
831 rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid);
833 rc = cifs_get_inode_info(&inode, full_path, NULL, sb,
837 return ERR_PTR(-ENOMEM);
839 #ifdef CONFIG_CIFS_FSCACHE
840 /* populate tcon->resource_id */
841 cifs_sb->tcon->resource_id = CIFS_I(inode)->uniqueid;
844 if (rc && cifs_sb->tcon->ipc) {
845 cFYI(1, "ipc connection - fake read inode");
846 inode->i_mode |= S_IFDIR;
848 inode->i_op = &cifs_ipc_inode_ops;
849 inode->i_fop = &simple_dir_operations;
850 inode->i_uid = cifs_sb->mnt_uid;
851 inode->i_gid = cifs_sb->mnt_gid;
861 /* can not call macro FreeXid here since in a void func
862 * TODO: This is no longer true
869 cifs_set_file_info(struct inode *inode, struct iattr *attrs, int xid,
870 char *full_path, __u32 dosattr)
876 bool set_time = false;
877 struct cifsFileInfo *open_file;
878 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
879 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
880 struct cifsTconInfo *pTcon = cifs_sb->tcon;
881 FILE_BASIC_INFO info_buf;
886 if (attrs->ia_valid & ATTR_ATIME) {
888 info_buf.LastAccessTime =
889 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
891 info_buf.LastAccessTime = 0;
893 if (attrs->ia_valid & ATTR_MTIME) {
895 info_buf.LastWriteTime =
896 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
898 info_buf.LastWriteTime = 0;
901 * Samba throws this field away, but windows may actually use it.
902 * Do not set ctime unless other time stamps are changed explicitly
903 * (i.e. by utimes()) since we would then have a mix of client and
906 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
907 cFYI(1, "CIFS - CTIME changed");
908 info_buf.ChangeTime =
909 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
911 info_buf.ChangeTime = 0;
913 info_buf.CreationTime = 0; /* don't change */
914 info_buf.Attributes = cpu_to_le32(dosattr);
917 * If the file is already open for write, just use that fileid
919 open_file = find_writable_file(cifsInode);
921 netfid = open_file->netfid;
922 netpid = open_file->pid;
923 goto set_via_filehandle;
927 * NT4 apparently returns success on this call, but it doesn't
930 if (!(pTcon->ses->flags & CIFS_SES_NT4)) {
931 rc = CIFSSMBSetPathInfo(xid, pTcon, full_path,
932 &info_buf, cifs_sb->local_nls,
933 cifs_sb->mnt_cifs_flags &
934 CIFS_MOUNT_MAP_SPECIAL_CHR);
936 cifsInode->cifsAttrs = dosattr;
938 } else if (rc != -EOPNOTSUPP && rc != -EINVAL)
942 cFYI(1, "calling SetFileInfo since SetPathInfo for "
943 "times not supported by this server");
944 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
945 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
946 CREATE_NOT_DIR, &netfid, &oplock,
947 NULL, cifs_sb->local_nls,
948 cifs_sb->mnt_cifs_flags &
949 CIFS_MOUNT_MAP_SPECIAL_CHR);
957 netpid = current->tgid;
960 rc = CIFSSMBSetFileInfo(xid, pTcon, &info_buf, netfid, netpid);
962 cifsInode->cifsAttrs = dosattr;
964 if (open_file == NULL)
965 CIFSSMBClose(xid, pTcon, netfid);
967 cifsFileInfo_put(open_file);
973 * open the given file (if it isn't already), set the DELETE_ON_CLOSE bit
974 * and rename it to a random name that hopefully won't conflict with
978 cifs_rename_pending_delete(char *full_path, struct dentry *dentry, int xid)
983 struct inode *inode = dentry->d_inode;
984 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
985 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
986 struct cifsTconInfo *tcon = cifs_sb->tcon;
987 __u32 dosattr, origattr;
988 FILE_BASIC_INFO *info_buf = NULL;
990 rc = CIFSSMBOpen(xid, tcon, full_path, FILE_OPEN,
991 DELETE|FILE_WRITE_ATTRIBUTES, CREATE_NOT_DIR,
992 &netfid, &oplock, NULL, cifs_sb->local_nls,
993 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
997 origattr = cifsInode->cifsAttrs;
999 origattr |= ATTR_NORMAL;
1001 dosattr = origattr & ~ATTR_READONLY;
1003 dosattr |= ATTR_NORMAL;
1004 dosattr |= ATTR_HIDDEN;
1006 /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */
1007 if (dosattr != origattr) {
1008 info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL);
1009 if (info_buf == NULL) {
1013 info_buf->Attributes = cpu_to_le32(dosattr);
1014 rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid,
1016 /* although we would like to mark the file hidden
1017 if that fails we will still try to rename it */
1019 cifsInode->cifsAttrs = dosattr;
1021 dosattr = origattr; /* since not able to change them */
1024 /* rename the file */
1025 rc = CIFSSMBRenameOpenFile(xid, tcon, netfid, NULL, cifs_sb->local_nls,
1026 cifs_sb->mnt_cifs_flags &
1027 CIFS_MOUNT_MAP_SPECIAL_CHR);
1033 /* try to set DELETE_ON_CLOSE */
1034 if (!cifsInode->delete_pending) {
1035 rc = CIFSSMBSetFileDisposition(xid, tcon, true, netfid,
1038 * some samba versions return -ENOENT when we try to set the
1039 * file disposition here. Likely a samba bug, but work around
1040 * it for now. This means that some cifsXXX files may hang
1041 * around after they shouldn't.
1043 * BB: remove this hack after more servers have the fix
1051 cifsInode->delete_pending = true;
1055 CIFSSMBClose(xid, tcon, netfid);
1061 * reset everything back to the original state. Don't bother
1062 * dealing with errors here since we can't do anything about
1066 CIFSSMBRenameOpenFile(xid, tcon, netfid, dentry->d_name.name,
1067 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
1068 CIFS_MOUNT_MAP_SPECIAL_CHR);
1070 if (dosattr != origattr) {
1071 info_buf->Attributes = cpu_to_le32(origattr);
1072 if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid,
1074 cifsInode->cifsAttrs = origattr;
1082 * If dentry->d_inode is null (usually meaning the cached dentry
1083 * is a negative dentry) then we would attempt a standard SMB delete, but
1084 * if that fails we can not attempt the fall back mechanisms on EACCESS
1085 * but will return the EACCESS to the caller. Note that the VFS does not call
1086 * unlink on negative dentries currently.
1088 int cifs_unlink(struct inode *dir, struct dentry *dentry)
1092 char *full_path = NULL;
1093 struct inode *inode = dentry->d_inode;
1094 struct cifsInodeInfo *cifs_inode;
1095 struct super_block *sb = dir->i_sb;
1096 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1097 struct cifsTconInfo *tcon = cifs_sb->tcon;
1098 struct iattr *attrs = NULL;
1099 __u32 dosattr = 0, origattr = 0;
1101 cFYI(1, "cifs_unlink, dir=0x%p, dentry=0x%p", dir, dentry);
1105 /* Unlink can be called from rename so we can not take the
1106 * sb->s_vfs_rename_mutex here */
1107 full_path = build_path_from_dentry(dentry);
1108 if (full_path == NULL) {
1114 if ((tcon->ses->capabilities & CAP_UNIX) &&
1115 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1116 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1117 rc = CIFSPOSIXDelFile(xid, tcon, full_path,
1118 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
1119 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1120 cFYI(1, "posix del rc %d", rc);
1121 if ((rc == 0) || (rc == -ENOENT))
1122 goto psx_del_no_retry;
1126 rc = CIFSSMBDelFile(xid, tcon, full_path, cifs_sb->local_nls,
1127 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1133 } else if (rc == -ENOENT) {
1135 } else if (rc == -ETXTBSY) {
1136 rc = cifs_rename_pending_delete(full_path, dentry, xid);
1139 } else if ((rc == -EACCES) && (dosattr == 0) && inode) {
1140 attrs = kzalloc(sizeof(*attrs), GFP_KERNEL);
1141 if (attrs == NULL) {
1146 /* try to reset dos attributes */
1147 cifs_inode = CIFS_I(inode);
1148 origattr = cifs_inode->cifsAttrs;
1150 origattr |= ATTR_NORMAL;
1151 dosattr = origattr & ~ATTR_READONLY;
1153 dosattr |= ATTR_NORMAL;
1154 dosattr |= ATTR_HIDDEN;
1156 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
1160 goto retry_std_delete;
1163 /* undo the setattr if we errored out and it's needed */
1164 if (rc != 0 && dosattr != 0)
1165 cifs_set_file_info(inode, attrs, xid, full_path, origattr);
1169 cifs_inode = CIFS_I(inode);
1170 cifs_inode->time = 0; /* will force revalidate to get info
1172 inode->i_ctime = current_fs_time(sb);
1174 dir->i_ctime = dir->i_mtime = current_fs_time(sb);
1175 cifs_inode = CIFS_I(dir);
1176 CIFS_I(dir)->time = 0; /* force revalidate of dir as well */
1184 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
1188 struct cifs_sb_info *cifs_sb;
1189 struct cifsTconInfo *pTcon;
1190 char *full_path = NULL;
1191 struct inode *newinode = NULL;
1192 struct cifs_fattr fattr;
1194 cFYI(1, "In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode);
1198 cifs_sb = CIFS_SB(inode->i_sb);
1199 pTcon = cifs_sb->tcon;
1201 full_path = build_path_from_dentry(direntry);
1202 if (full_path == NULL) {
1208 if ((pTcon->ses->capabilities & CAP_UNIX) &&
1209 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1210 le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
1212 FILE_UNIX_BASIC_INFO *pInfo =
1213 kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1214 if (pInfo == NULL) {
1219 mode &= ~current_umask();
1220 rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT,
1221 mode, NULL /* netfid */, pInfo, &oplock,
1222 full_path, cifs_sb->local_nls,
1223 cifs_sb->mnt_cifs_flags &
1224 CIFS_MOUNT_MAP_SPECIAL_CHR);
1225 if (rc == -EOPNOTSUPP) {
1227 goto mkdir_retry_old;
1229 cFYI(1, "posix mkdir returned 0x%x", rc);
1232 if (pInfo->Type == cpu_to_le32(-1)) {
1233 /* no return info, go query for it */
1235 goto mkdir_get_info;
1237 /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
1241 direntry->d_op = &cifs_ci_dentry_ops;
1243 direntry->d_op = &cifs_dentry_ops;
1245 cifs_unix_basic_to_fattr(&fattr, pInfo, cifs_sb);
1246 cifs_fill_uniqueid(inode->i_sb, &fattr);
1247 newinode = cifs_iget(inode->i_sb, &fattr);
1250 goto mkdir_get_info;
1253 d_instantiate(direntry, newinode);
1255 #ifdef CONFIG_CIFS_DEBUG2
1256 cFYI(1, "instantiated dentry %p %s to inode %p",
1257 direntry, direntry->d_name.name, newinode);
1259 if (newinode->i_nlink != 2)
1260 cFYI(1, "unexpected number of links %d",
1268 /* BB add setting the equivalent of mode via CreateX w/ACLs */
1269 rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
1270 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1272 cFYI(1, "cifs_mkdir returned 0x%x", rc);
1277 if (pTcon->unix_ext)
1278 rc = cifs_get_inode_info_unix(&newinode, full_path,
1281 rc = cifs_get_inode_info(&newinode, full_path, NULL,
1282 inode->i_sb, xid, NULL);
1285 direntry->d_op = &cifs_ci_dentry_ops;
1287 direntry->d_op = &cifs_dentry_ops;
1288 d_instantiate(direntry, newinode);
1289 /* setting nlink not necessary except in cases where we
1290 * failed to get it from the server or was set bogus */
1291 if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
1292 direntry->d_inode->i_nlink = 2;
1294 mode &= ~current_umask();
1295 /* must turn on setgid bit if parent dir has it */
1296 if (inode->i_mode & S_ISGID)
1299 if (pTcon->unix_ext) {
1300 struct cifs_unix_set_info_args args = {
1302 .ctime = NO_CHANGE_64,
1303 .atime = NO_CHANGE_64,
1304 .mtime = NO_CHANGE_64,
1307 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1308 args.uid = (__u64)current_fsuid();
1309 if (inode->i_mode & S_ISGID)
1310 args.gid = (__u64)inode->i_gid;
1312 args.gid = (__u64)current_fsgid();
1314 args.uid = NO_CHANGE_64;
1315 args.gid = NO_CHANGE_64;
1317 CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, &args,
1319 cifs_sb->mnt_cifs_flags &
1320 CIFS_MOUNT_MAP_SPECIAL_CHR);
1322 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
1323 (mode & S_IWUGO) == 0) {
1324 FILE_BASIC_INFO pInfo;
1325 struct cifsInodeInfo *cifsInode;
1328 memset(&pInfo, 0, sizeof(pInfo));
1329 cifsInode = CIFS_I(newinode);
1330 dosattrs = cifsInode->cifsAttrs|ATTR_READONLY;
1331 pInfo.Attributes = cpu_to_le32(dosattrs);
1332 tmprc = CIFSSMBSetPathInfo(xid, pTcon,
1335 cifs_sb->mnt_cifs_flags &
1336 CIFS_MOUNT_MAP_SPECIAL_CHR);
1338 cifsInode->cifsAttrs = dosattrs;
1340 if (direntry->d_inode) {
1341 if (cifs_sb->mnt_cifs_flags &
1343 direntry->d_inode->i_mode =
1346 if (cifs_sb->mnt_cifs_flags &
1347 CIFS_MOUNT_SET_UID) {
1348 direntry->d_inode->i_uid =
1350 if (inode->i_mode & S_ISGID)
1351 direntry->d_inode->i_gid =
1354 direntry->d_inode->i_gid =
1366 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1370 struct cifs_sb_info *cifs_sb;
1371 struct cifsTconInfo *pTcon;
1372 char *full_path = NULL;
1373 struct cifsInodeInfo *cifsInode;
1375 cFYI(1, "cifs_rmdir, inode = 0x%p", inode);
1379 cifs_sb = CIFS_SB(inode->i_sb);
1380 pTcon = cifs_sb->tcon;
1382 full_path = build_path_from_dentry(direntry);
1383 if (full_path == NULL) {
1389 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1390 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1394 spin_lock(&direntry->d_inode->i_lock);
1395 i_size_write(direntry->d_inode, 0);
1396 clear_nlink(direntry->d_inode);
1397 spin_unlock(&direntry->d_inode->i_lock);
1400 cifsInode = CIFS_I(direntry->d_inode);
1401 cifsInode->time = 0; /* force revalidate to go get info when
1404 cifsInode = CIFS_I(inode);
1405 cifsInode->time = 0; /* force revalidate to get parent dir info
1406 since cached search results now invalid */
1408 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1409 current_fs_time(inode->i_sb);
1417 cifs_do_rename(int xid, struct dentry *from_dentry, const char *fromPath,
1418 struct dentry *to_dentry, const char *toPath)
1420 struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb);
1421 struct cifsTconInfo *pTcon = cifs_sb->tcon;
1425 /* try path-based rename first */
1426 rc = CIFSSMBRename(xid, pTcon, fromPath, toPath, cifs_sb->local_nls,
1427 cifs_sb->mnt_cifs_flags &
1428 CIFS_MOUNT_MAP_SPECIAL_CHR);
1431 * don't bother with rename by filehandle unless file is busy and
1432 * source Note that cross directory moves do not work with
1433 * rename by filehandle to various Windows servers.
1435 if (rc == 0 || rc != -ETXTBSY)
1438 /* open-file renames don't work across directories */
1439 if (to_dentry->d_parent != from_dentry->d_parent)
1442 /* open the file to be renamed -- we need DELETE perms */
1443 rc = CIFSSMBOpen(xid, pTcon, fromPath, FILE_OPEN, DELETE,
1444 CREATE_NOT_DIR, &srcfid, &oplock, NULL,
1445 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
1446 CIFS_MOUNT_MAP_SPECIAL_CHR);
1449 rc = CIFSSMBRenameOpenFile(xid, pTcon, srcfid,
1450 (const char *) to_dentry->d_name.name,
1451 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
1452 CIFS_MOUNT_MAP_SPECIAL_CHR);
1454 CIFSSMBClose(xid, pTcon, srcfid);
1460 int cifs_rename(struct inode *source_dir, struct dentry *source_dentry,
1461 struct inode *target_dir, struct dentry *target_dentry)
1463 char *fromName = NULL;
1464 char *toName = NULL;
1465 struct cifs_sb_info *cifs_sb_source;
1466 struct cifs_sb_info *cifs_sb_target;
1467 struct cifsTconInfo *tcon;
1468 FILE_UNIX_BASIC_INFO *info_buf_source = NULL;
1469 FILE_UNIX_BASIC_INFO *info_buf_target;
1472 cifs_sb_target = CIFS_SB(target_dir->i_sb);
1473 cifs_sb_source = CIFS_SB(source_dir->i_sb);
1474 tcon = cifs_sb_source->tcon;
1479 * BB: this might be allowed if same server, but different share.
1480 * Consider adding support for this
1482 if (tcon != cifs_sb_target->tcon) {
1484 goto cifs_rename_exit;
1488 * we already have the rename sem so we do not need to
1489 * grab it again here to protect the path integrity
1491 fromName = build_path_from_dentry(source_dentry);
1492 if (fromName == NULL) {
1494 goto cifs_rename_exit;
1497 toName = build_path_from_dentry(target_dentry);
1498 if (toName == NULL) {
1500 goto cifs_rename_exit;
1503 rc = cifs_do_rename(xid, source_dentry, fromName,
1504 target_dentry, toName);
1506 if (rc == -EEXIST && tcon->unix_ext) {
1508 * Are src and dst hardlinks of same inode? We can
1509 * only tell with unix extensions enabled
1512 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO),
1514 if (info_buf_source == NULL) {
1516 goto cifs_rename_exit;
1519 info_buf_target = info_buf_source + 1;
1520 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, fromName,
1522 cifs_sb_source->local_nls,
1523 cifs_sb_source->mnt_cifs_flags &
1524 CIFS_MOUNT_MAP_SPECIAL_CHR);
1528 tmprc = CIFSSMBUnixQPathInfo(xid, tcon,
1529 toName, info_buf_target,
1530 cifs_sb_target->local_nls,
1531 /* remap based on source sb */
1532 cifs_sb_source->mnt_cifs_flags &
1533 CIFS_MOUNT_MAP_SPECIAL_CHR);
1535 if (tmprc == 0 && (info_buf_source->UniqueId ==
1536 info_buf_target->UniqueId)) {
1537 /* same file, POSIX says that this is a noop */
1539 goto cifs_rename_exit;
1541 } /* else ... BB we could add the same check for Windows by
1542 checking the UniqueId via FILE_INTERNAL_INFO */
1545 /* Try unlinking the target dentry if it's not negative */
1546 if (target_dentry->d_inode && (rc == -EACCES || rc == -EEXIST)) {
1547 tmprc = cifs_unlink(target_dir, target_dentry);
1549 goto cifs_rename_exit;
1551 rc = cifs_do_rename(xid, source_dentry, fromName,
1552 target_dentry, toName);
1556 kfree(info_buf_source);
1564 cifs_inode_needs_reval(struct inode *inode)
1566 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
1568 if (cifs_i->clientCanCacheRead)
1571 if (!lookupCacheEnabled)
1574 if (cifs_i->time == 0)
1577 /* FIXME: the actimeo should be tunable */
1578 if (time_after_eq(jiffies, cifs_i->time + HZ))
1581 /* hardlinked files w/ noserverino get "special" treatment */
1582 if (!(CIFS_SB(inode->i_sb)->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) &&
1583 S_ISREG(inode->i_mode) && inode->i_nlink != 1)
1589 /* check invalid_mapping flag and zap the cache if it's set */
1591 cifs_invalidate_mapping(struct inode *inode)
1594 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
1596 cifs_i->invalid_mapping = false;
1598 /* write back any cached data */
1599 if (inode->i_mapping && inode->i_mapping->nrpages != 0) {
1600 rc = filemap_write_and_wait(inode->i_mapping);
1602 cifs_i->write_behind_rc = rc;
1604 invalidate_remote_inode(inode);
1605 cifs_fscache_reset_inode_cookie(inode);
1608 int cifs_revalidate_file(struct file *filp)
1611 struct inode *inode = filp->f_path.dentry->d_inode;
1613 if (!cifs_inode_needs_reval(inode))
1616 if (CIFS_SB(inode->i_sb)->tcon->unix_ext)
1617 rc = cifs_get_file_info_unix(filp);
1619 rc = cifs_get_file_info(filp);
1622 if (CIFS_I(inode)->invalid_mapping)
1623 cifs_invalidate_mapping(inode);
1628 /* revalidate a dentry's inode attributes */
1629 int cifs_revalidate_dentry(struct dentry *dentry)
1633 char *full_path = NULL;
1634 struct inode *inode = dentry->d_inode;
1635 struct super_block *sb = dentry->d_sb;
1642 if (!cifs_inode_needs_reval(inode))
1645 /* can not safely grab the rename sem here if rename calls revalidate
1646 since that would deadlock */
1647 full_path = build_path_from_dentry(dentry);
1648 if (full_path == NULL) {
1653 cFYI(1, "Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1654 "jiffies %ld", full_path, inode, inode->i_count.counter,
1655 dentry, dentry->d_time, jiffies);
1657 if (CIFS_SB(sb)->tcon->unix_ext)
1658 rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid);
1660 rc = cifs_get_inode_info(&inode, full_path, NULL, sb,
1664 if (CIFS_I(inode)->invalid_mapping)
1665 cifs_invalidate_mapping(inode);
1672 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1675 int err = cifs_revalidate_dentry(dentry);
1677 generic_fillattr(dentry->d_inode, stat);
1678 stat->blksize = CIFS_MAX_MSGSIZE;
1679 stat->ino = CIFS_I(dentry->d_inode)->uniqueid;
1684 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1686 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1687 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1691 page = grab_cache_page(mapping, index);
1695 zero_user_segment(page, offset, PAGE_CACHE_SIZE);
1697 page_cache_release(page);
1701 static void cifs_setsize(struct inode *inode, loff_t offset)
1705 spin_lock(&inode->i_lock);
1706 oldsize = inode->i_size;
1707 i_size_write(inode, offset);
1708 spin_unlock(&inode->i_lock);
1710 truncate_pagecache(inode, oldsize, offset);
1714 cifs_set_file_size(struct inode *inode, struct iattr *attrs,
1715 int xid, char *full_path)
1718 struct cifsFileInfo *open_file;
1719 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1720 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1721 struct cifsTconInfo *pTcon = cifs_sb->tcon;
1724 * To avoid spurious oplock breaks from server, in the case of
1725 * inodes that we already have open, avoid doing path based
1726 * setting of file size if we can do it by handle.
1727 * This keeps our caching token (oplock) and avoids timeouts
1728 * when the local oplock break takes longer to flush
1729 * writebehind data than the SMB timeout for the SetPathInfo
1730 * request would allow
1732 open_file = find_writable_file(cifsInode);
1734 __u16 nfid = open_file->netfid;
1735 __u32 npid = open_file->pid;
1736 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size, nfid,
1738 cifsFileInfo_put(open_file);
1739 cFYI(1, "SetFSize for attrs rc = %d", rc);
1740 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1741 unsigned int bytes_written;
1742 rc = CIFSSMBWrite(xid, pTcon, nfid, 0, attrs->ia_size,
1743 &bytes_written, NULL, NULL, 1);
1744 cFYI(1, "Wrt seteof rc %d", rc);
1750 /* Set file size by pathname rather than by handle
1751 either because no valid, writeable file handle for
1752 it was found or because there was an error setting
1754 rc = CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size,
1755 false, cifs_sb->local_nls,
1756 cifs_sb->mnt_cifs_flags &
1757 CIFS_MOUNT_MAP_SPECIAL_CHR);
1758 cFYI(1, "SetEOF by path (setattrs) rc = %d", rc);
1759 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1763 rc = SMBLegacyOpen(xid, pTcon, full_path,
1764 FILE_OPEN, GENERIC_WRITE,
1765 CREATE_NOT_DIR, &netfid, &oplock, NULL,
1767 cifs_sb->mnt_cifs_flags &
1768 CIFS_MOUNT_MAP_SPECIAL_CHR);
1770 unsigned int bytes_written;
1771 rc = CIFSSMBWrite(xid, pTcon, netfid, 0,
1773 &bytes_written, NULL,
1775 cFYI(1, "wrt seteof rc %d", rc);
1776 CIFSSMBClose(xid, pTcon, netfid);
1782 cifsInode->server_eof = attrs->ia_size;
1783 cifs_setsize(inode, attrs->ia_size);
1784 cifs_truncate_page(inode->i_mapping, inode->i_size);
1791 cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
1795 char *full_path = NULL;
1796 struct inode *inode = direntry->d_inode;
1797 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1798 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1799 struct cifsTconInfo *pTcon = cifs_sb->tcon;
1800 struct cifs_unix_set_info_args *args = NULL;
1801 struct cifsFileInfo *open_file;
1803 cFYI(1, "setattr_unix on file %s attrs->ia_valid=0x%x",
1804 direntry->d_name.name, attrs->ia_valid);
1808 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
1809 attrs->ia_valid |= ATTR_FORCE;
1811 rc = inode_change_ok(inode, attrs);
1815 full_path = build_path_from_dentry(direntry);
1816 if (full_path == NULL) {
1822 * Attempt to flush data before changing attributes. We need to do
1823 * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the
1824 * ownership or mode then we may also need to do this. Here, we take
1825 * the safe way out and just do the flush on all setattr requests. If
1826 * the flush returns error, store it to report later and continue.
1828 * BB: This should be smarter. Why bother flushing pages that
1829 * will be truncated anyway? Also, should we error out here if
1830 * the flush returns error?
1832 rc = filemap_write_and_wait(inode->i_mapping);
1834 cifsInode->write_behind_rc = rc;
1838 if (attrs->ia_valid & ATTR_SIZE) {
1839 rc = cifs_set_file_size(inode, attrs, xid, full_path);
1844 /* skip mode change if it's just for clearing setuid/setgid */
1845 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1846 attrs->ia_valid &= ~ATTR_MODE;
1848 args = kmalloc(sizeof(*args), GFP_KERNEL);
1854 /* set up the struct */
1855 if (attrs->ia_valid & ATTR_MODE)
1856 args->mode = attrs->ia_mode;
1858 args->mode = NO_CHANGE_64;
1860 if (attrs->ia_valid & ATTR_UID)
1861 args->uid = attrs->ia_uid;
1863 args->uid = NO_CHANGE_64;
1865 if (attrs->ia_valid & ATTR_GID)
1866 args->gid = attrs->ia_gid;
1868 args->gid = NO_CHANGE_64;
1870 if (attrs->ia_valid & ATTR_ATIME)
1871 args->atime = cifs_UnixTimeToNT(attrs->ia_atime);
1873 args->atime = NO_CHANGE_64;
1875 if (attrs->ia_valid & ATTR_MTIME)
1876 args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime);
1878 args->mtime = NO_CHANGE_64;
1880 if (attrs->ia_valid & ATTR_CTIME)
1881 args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime);
1883 args->ctime = NO_CHANGE_64;
1886 open_file = find_writable_file(cifsInode);
1888 u16 nfid = open_file->netfid;
1889 u32 npid = open_file->pid;
1890 rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid);
1891 cifsFileInfo_put(open_file);
1893 rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args,
1895 cifs_sb->mnt_cifs_flags &
1896 CIFS_MOUNT_MAP_SPECIAL_CHR);
1902 if ((attrs->ia_valid & ATTR_SIZE) &&
1903 attrs->ia_size != i_size_read(inode))
1904 truncate_setsize(inode, attrs->ia_size);
1906 setattr_copy(inode, attrs);
1907 mark_inode_dirty(inode);
1909 /* force revalidate when any of these times are set since some
1910 of the fs types (eg ext3, fat) do not have fine enough
1911 time granularity to match protocol, and we do not have a
1912 a way (yet) to query the server fs's time granularity (and
1913 whether it rounds times down).
1915 if (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1916 cifsInode->time = 0;
1925 cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
1928 struct inode *inode = direntry->d_inode;
1929 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1930 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1931 char *full_path = NULL;
1934 __u64 mode = NO_CHANGE_64;
1938 cFYI(1, "setattr on file %s attrs->iavalid 0x%x",
1939 direntry->d_name.name, attrs->ia_valid);
1941 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
1942 attrs->ia_valid |= ATTR_FORCE;
1944 rc = inode_change_ok(inode, attrs);
1950 full_path = build_path_from_dentry(direntry);
1951 if (full_path == NULL) {
1958 * Attempt to flush data before changing attributes. We need to do
1959 * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the
1960 * ownership or mode then we may also need to do this. Here, we take
1961 * the safe way out and just do the flush on all setattr requests. If
1962 * the flush returns error, store it to report later and continue.
1964 * BB: This should be smarter. Why bother flushing pages that
1965 * will be truncated anyway? Also, should we error out here if
1966 * the flush returns error?
1968 rc = filemap_write_and_wait(inode->i_mapping);
1970 cifsInode->write_behind_rc = rc;
1974 if (attrs->ia_valid & ATTR_SIZE) {
1975 rc = cifs_set_file_size(inode, attrs, xid, full_path);
1977 goto cifs_setattr_exit;
1981 * Without unix extensions we can't send ownership changes to the
1982 * server, so silently ignore them. This is consistent with how
1983 * local DOS/Windows filesystems behave (VFAT, NTFS, etc). With
1984 * CIFSACL support + proper Windows to Unix idmapping, we may be
1985 * able to support this in the future.
1987 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID))
1988 attrs->ia_valid &= ~(ATTR_UID | ATTR_GID);
1990 /* skip mode change if it's just for clearing setuid/setgid */
1991 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1992 attrs->ia_valid &= ~ATTR_MODE;
1994 if (attrs->ia_valid & ATTR_MODE) {
1995 cFYI(1, "Mode changed to 0%o", attrs->ia_mode);
1996 mode = attrs->ia_mode;
1999 if (attrs->ia_valid & ATTR_MODE) {
2001 #ifdef CONFIG_CIFS_EXPERIMENTAL
2002 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
2003 rc = mode_to_acl(inode, full_path, mode);
2006 if (((mode & S_IWUGO) == 0) &&
2007 (cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
2009 dosattr = cifsInode->cifsAttrs | ATTR_READONLY;
2011 /* fix up mode if we're not using dynperm */
2012 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
2013 attrs->ia_mode = inode->i_mode & ~S_IWUGO;
2014 } else if ((mode & S_IWUGO) &&
2015 (cifsInode->cifsAttrs & ATTR_READONLY)) {
2017 dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
2018 /* Attributes of 0 are ignored */
2020 dosattr |= ATTR_NORMAL;
2022 /* reset local inode permissions to normal */
2023 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2024 attrs->ia_mode &= ~(S_IALLUGO);
2025 if (S_ISDIR(inode->i_mode))
2027 cifs_sb->mnt_dir_mode;
2030 cifs_sb->mnt_file_mode;
2032 } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2033 /* ignore mode change - ATTR_READONLY hasn't changed */
2034 attrs->ia_valid &= ~ATTR_MODE;
2038 if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) ||
2039 ((attrs->ia_valid & ATTR_MODE) && dosattr)) {
2040 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
2041 /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */
2043 /* Even if error on time set, no sense failing the call if
2044 the server would set the time to a reasonable value anyway,
2045 and this check ensures that we are not being called from
2046 sys_utimes in which case we ought to fail the call back to
2047 the user when the server rejects the call */
2048 if ((rc) && (attrs->ia_valid &
2049 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
2053 /* do not need local check to inode_check_ok since the server does
2056 goto cifs_setattr_exit;
2058 if ((attrs->ia_valid & ATTR_SIZE) &&
2059 attrs->ia_size != i_size_read(inode))
2060 truncate_setsize(inode, attrs->ia_size);
2062 setattr_copy(inode, attrs);
2063 mark_inode_dirty(inode);
2073 cifs_setattr(struct dentry *direntry, struct iattr *attrs)
2075 struct inode *inode = direntry->d_inode;
2076 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2077 struct cifsTconInfo *pTcon = cifs_sb->tcon;
2079 if (pTcon->unix_ext)
2080 return cifs_setattr_unix(direntry, attrs);
2082 return cifs_setattr_nounix(direntry, attrs);
2084 /* BB: add cifs_setattr_legacy for really old servers */
2088 void cifs_delete_inode(struct inode *inode)
2090 cFYI(1, "In cifs_delete_inode, inode = 0x%p", inode);
2091 /* may have to add back in if and when safe distributed caching of
2092 directories added e.g. via FindNotify */