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))
736 * uh oh -- it's a directory. We can't use it since hardlinked dirs are
737 * verboten. Disable serverino and return it as if it were found, the
738 * caller can discard it, generate a uniqueid and retry the find
740 if (S_ISDIR(inode->i_mode) && !list_empty(&inode->i_dentry)) {
741 fattr->cf_flags |= CIFS_FATTR_INO_COLLISION;
742 cifs_autodisable_serverino(CIFS_SB(inode->i_sb));
749 cifs_init_inode(struct inode *inode, void *opaque)
751 struct cifs_fattr *fattr = (struct cifs_fattr *) opaque;
753 CIFS_I(inode)->uniqueid = fattr->cf_uniqueid;
757 /* Given fattrs, get a corresponding inode */
759 cifs_iget(struct super_block *sb, struct cifs_fattr *fattr)
765 cFYI(1, "looking for uniqueid=%llu", fattr->cf_uniqueid);
767 /* hash down to 32-bits on 32-bit arch */
768 hash = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid);
770 inode = iget5_locked(sb, hash, cifs_find_inode, cifs_init_inode, fattr);
772 /* was there a problematic inode number collision? */
773 if (fattr->cf_flags & CIFS_FATTR_INO_COLLISION) {
775 fattr->cf_uniqueid = iunique(sb, ROOT_I);
776 fattr->cf_flags &= ~CIFS_FATTR_INO_COLLISION;
777 goto retry_iget5_locked;
780 cifs_fattr_to_inode(inode, fattr);
781 if (sb->s_flags & MS_NOATIME)
782 inode->i_flags |= S_NOATIME | S_NOCMTIME;
783 if (inode->i_state & I_NEW) {
785 #ifdef CONFIG_CIFS_FSCACHE
786 /* initialize per-inode cache cookie pointer */
787 CIFS_I(inode)->fscache = NULL;
789 unlock_new_inode(inode);
796 /* gets root inode */
797 struct inode *cifs_root_iget(struct super_block *sb, unsigned long ino)
800 struct cifs_sb_info *cifs_sb;
801 struct inode *inode = NULL;
805 cifs_sb = CIFS_SB(sb);
806 full_path = cifs_build_path_to_root(cifs_sb);
807 if (full_path == NULL)
808 return ERR_PTR(-ENOMEM);
811 if (cifs_sb->tcon->unix_ext)
812 rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid);
814 rc = cifs_get_inode_info(&inode, full_path, NULL, sb,
818 return ERR_PTR(-ENOMEM);
820 #ifdef CONFIG_CIFS_FSCACHE
821 /* populate tcon->resource_id */
822 cifs_sb->tcon->resource_id = CIFS_I(inode)->uniqueid;
825 if (rc && cifs_sb->tcon->ipc) {
826 cFYI(1, "ipc connection - fake read inode");
827 inode->i_mode |= S_IFDIR;
829 inode->i_op = &cifs_ipc_inode_ops;
830 inode->i_fop = &simple_dir_operations;
831 inode->i_uid = cifs_sb->mnt_uid;
832 inode->i_gid = cifs_sb->mnt_gid;
842 /* can not call macro FreeXid here since in a void func
843 * TODO: This is no longer true
850 cifs_set_file_info(struct inode *inode, struct iattr *attrs, int xid,
851 char *full_path, __u32 dosattr)
857 bool set_time = false;
858 struct cifsFileInfo *open_file;
859 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
860 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
861 struct cifsTconInfo *pTcon = cifs_sb->tcon;
862 FILE_BASIC_INFO info_buf;
867 if (attrs->ia_valid & ATTR_ATIME) {
869 info_buf.LastAccessTime =
870 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
872 info_buf.LastAccessTime = 0;
874 if (attrs->ia_valid & ATTR_MTIME) {
876 info_buf.LastWriteTime =
877 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
879 info_buf.LastWriteTime = 0;
882 * Samba throws this field away, but windows may actually use it.
883 * Do not set ctime unless other time stamps are changed explicitly
884 * (i.e. by utimes()) since we would then have a mix of client and
887 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
888 cFYI(1, "CIFS - CTIME changed");
889 info_buf.ChangeTime =
890 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
892 info_buf.ChangeTime = 0;
894 info_buf.CreationTime = 0; /* don't change */
895 info_buf.Attributes = cpu_to_le32(dosattr);
898 * If the file is already open for write, just use that fileid
900 open_file = find_writable_file(cifsInode);
902 netfid = open_file->netfid;
903 netpid = open_file->pid;
904 goto set_via_filehandle;
908 * NT4 apparently returns success on this call, but it doesn't
911 if (!(pTcon->ses->flags & CIFS_SES_NT4)) {
912 rc = CIFSSMBSetPathInfo(xid, pTcon, full_path,
913 &info_buf, cifs_sb->local_nls,
914 cifs_sb->mnt_cifs_flags &
915 CIFS_MOUNT_MAP_SPECIAL_CHR);
917 cifsInode->cifsAttrs = dosattr;
919 } else if (rc != -EOPNOTSUPP && rc != -EINVAL)
923 cFYI(1, "calling SetFileInfo since SetPathInfo for "
924 "times not supported by this server");
925 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
926 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
927 CREATE_NOT_DIR, &netfid, &oplock,
928 NULL, cifs_sb->local_nls,
929 cifs_sb->mnt_cifs_flags &
930 CIFS_MOUNT_MAP_SPECIAL_CHR);
938 netpid = current->tgid;
941 rc = CIFSSMBSetFileInfo(xid, pTcon, &info_buf, netfid, netpid);
943 cifsInode->cifsAttrs = dosattr;
945 if (open_file == NULL)
946 CIFSSMBClose(xid, pTcon, netfid);
948 cifsFileInfo_put(open_file);
954 * open the given file (if it isn't already), set the DELETE_ON_CLOSE bit
955 * and rename it to a random name that hopefully won't conflict with
959 cifs_rename_pending_delete(char *full_path, struct dentry *dentry, int xid)
964 struct inode *inode = dentry->d_inode;
965 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
966 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
967 struct cifsTconInfo *tcon = cifs_sb->tcon;
968 __u32 dosattr, origattr;
969 FILE_BASIC_INFO *info_buf = NULL;
971 rc = CIFSSMBOpen(xid, tcon, full_path, FILE_OPEN,
972 DELETE|FILE_WRITE_ATTRIBUTES, CREATE_NOT_DIR,
973 &netfid, &oplock, NULL, cifs_sb->local_nls,
974 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
978 origattr = cifsInode->cifsAttrs;
980 origattr |= ATTR_NORMAL;
982 dosattr = origattr & ~ATTR_READONLY;
984 dosattr |= ATTR_NORMAL;
985 dosattr |= ATTR_HIDDEN;
987 /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */
988 if (dosattr != origattr) {
989 info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL);
990 if (info_buf == NULL) {
994 info_buf->Attributes = cpu_to_le32(dosattr);
995 rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid,
997 /* although we would like to mark the file hidden
998 if that fails we will still try to rename it */
1000 cifsInode->cifsAttrs = dosattr;
1002 dosattr = origattr; /* since not able to change them */
1005 /* rename the file */
1006 rc = CIFSSMBRenameOpenFile(xid, tcon, netfid, NULL, cifs_sb->local_nls,
1007 cifs_sb->mnt_cifs_flags &
1008 CIFS_MOUNT_MAP_SPECIAL_CHR);
1014 /* try to set DELETE_ON_CLOSE */
1015 if (!cifsInode->delete_pending) {
1016 rc = CIFSSMBSetFileDisposition(xid, tcon, true, netfid,
1019 * some samba versions return -ENOENT when we try to set the
1020 * file disposition here. Likely a samba bug, but work around
1021 * it for now. This means that some cifsXXX files may hang
1022 * around after they shouldn't.
1024 * BB: remove this hack after more servers have the fix
1032 cifsInode->delete_pending = true;
1036 CIFSSMBClose(xid, tcon, netfid);
1042 * reset everything back to the original state. Don't bother
1043 * dealing with errors here since we can't do anything about
1047 CIFSSMBRenameOpenFile(xid, tcon, netfid, dentry->d_name.name,
1048 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
1049 CIFS_MOUNT_MAP_SPECIAL_CHR);
1051 if (dosattr != origattr) {
1052 info_buf->Attributes = cpu_to_le32(origattr);
1053 if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid,
1055 cifsInode->cifsAttrs = origattr;
1063 * If dentry->d_inode is null (usually meaning the cached dentry
1064 * is a negative dentry) then we would attempt a standard SMB delete, but
1065 * if that fails we can not attempt the fall back mechanisms on EACCESS
1066 * but will return the EACCESS to the caller. Note that the VFS does not call
1067 * unlink on negative dentries currently.
1069 int cifs_unlink(struct inode *dir, struct dentry *dentry)
1073 char *full_path = NULL;
1074 struct inode *inode = dentry->d_inode;
1075 struct cifsInodeInfo *cifs_inode;
1076 struct super_block *sb = dir->i_sb;
1077 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1078 struct cifsTconInfo *tcon = cifs_sb->tcon;
1079 struct iattr *attrs = NULL;
1080 __u32 dosattr = 0, origattr = 0;
1082 cFYI(1, "cifs_unlink, dir=0x%p, dentry=0x%p", dir, dentry);
1086 /* Unlink can be called from rename so we can not take the
1087 * sb->s_vfs_rename_mutex here */
1088 full_path = build_path_from_dentry(dentry);
1089 if (full_path == NULL) {
1095 if ((tcon->ses->capabilities & CAP_UNIX) &&
1096 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1097 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1098 rc = CIFSPOSIXDelFile(xid, tcon, full_path,
1099 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
1100 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1101 cFYI(1, "posix del rc %d", rc);
1102 if ((rc == 0) || (rc == -ENOENT))
1103 goto psx_del_no_retry;
1107 rc = CIFSSMBDelFile(xid, tcon, full_path, cifs_sb->local_nls,
1108 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1114 } else if (rc == -ENOENT) {
1116 } else if (rc == -ETXTBSY) {
1117 rc = cifs_rename_pending_delete(full_path, dentry, xid);
1120 } else if ((rc == -EACCES) && (dosattr == 0) && inode) {
1121 attrs = kzalloc(sizeof(*attrs), GFP_KERNEL);
1122 if (attrs == NULL) {
1127 /* try to reset dos attributes */
1128 cifs_inode = CIFS_I(inode);
1129 origattr = cifs_inode->cifsAttrs;
1131 origattr |= ATTR_NORMAL;
1132 dosattr = origattr & ~ATTR_READONLY;
1134 dosattr |= ATTR_NORMAL;
1135 dosattr |= ATTR_HIDDEN;
1137 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
1141 goto retry_std_delete;
1144 /* undo the setattr if we errored out and it's needed */
1145 if (rc != 0 && dosattr != 0)
1146 cifs_set_file_info(inode, attrs, xid, full_path, origattr);
1150 cifs_inode = CIFS_I(inode);
1151 cifs_inode->time = 0; /* will force revalidate to get info
1153 inode->i_ctime = current_fs_time(sb);
1155 dir->i_ctime = dir->i_mtime = current_fs_time(sb);
1156 cifs_inode = CIFS_I(dir);
1157 CIFS_I(dir)->time = 0; /* force revalidate of dir as well */
1165 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
1169 struct cifs_sb_info *cifs_sb;
1170 struct cifsTconInfo *pTcon;
1171 char *full_path = NULL;
1172 struct inode *newinode = NULL;
1173 struct cifs_fattr fattr;
1175 cFYI(1, "In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode);
1179 cifs_sb = CIFS_SB(inode->i_sb);
1180 pTcon = cifs_sb->tcon;
1182 full_path = build_path_from_dentry(direntry);
1183 if (full_path == NULL) {
1189 if ((pTcon->ses->capabilities & CAP_UNIX) &&
1190 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1191 le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
1193 FILE_UNIX_BASIC_INFO *pInfo =
1194 kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1195 if (pInfo == NULL) {
1200 mode &= ~current_umask();
1201 rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT,
1202 mode, NULL /* netfid */, pInfo, &oplock,
1203 full_path, cifs_sb->local_nls,
1204 cifs_sb->mnt_cifs_flags &
1205 CIFS_MOUNT_MAP_SPECIAL_CHR);
1206 if (rc == -EOPNOTSUPP) {
1208 goto mkdir_retry_old;
1210 cFYI(1, "posix mkdir returned 0x%x", rc);
1213 if (pInfo->Type == cpu_to_le32(-1)) {
1214 /* no return info, go query for it */
1216 goto mkdir_get_info;
1218 /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
1222 direntry->d_op = &cifs_ci_dentry_ops;
1224 direntry->d_op = &cifs_dentry_ops;
1226 cifs_unix_basic_to_fattr(&fattr, pInfo, cifs_sb);
1227 cifs_fill_uniqueid(inode->i_sb, &fattr);
1228 newinode = cifs_iget(inode->i_sb, &fattr);
1231 goto mkdir_get_info;
1234 d_instantiate(direntry, newinode);
1236 #ifdef CONFIG_CIFS_DEBUG2
1237 cFYI(1, "instantiated dentry %p %s to inode %p",
1238 direntry, direntry->d_name.name, newinode);
1240 if (newinode->i_nlink != 2)
1241 cFYI(1, "unexpected number of links %d",
1249 /* BB add setting the equivalent of mode via CreateX w/ACLs */
1250 rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
1251 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1253 cFYI(1, "cifs_mkdir returned 0x%x", rc);
1258 if (pTcon->unix_ext)
1259 rc = cifs_get_inode_info_unix(&newinode, full_path,
1262 rc = cifs_get_inode_info(&newinode, full_path, NULL,
1263 inode->i_sb, xid, NULL);
1266 direntry->d_op = &cifs_ci_dentry_ops;
1268 direntry->d_op = &cifs_dentry_ops;
1269 d_instantiate(direntry, newinode);
1270 /* setting nlink not necessary except in cases where we
1271 * failed to get it from the server or was set bogus */
1272 if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
1273 direntry->d_inode->i_nlink = 2;
1275 mode &= ~current_umask();
1276 /* must turn on setgid bit if parent dir has it */
1277 if (inode->i_mode & S_ISGID)
1280 if (pTcon->unix_ext) {
1281 struct cifs_unix_set_info_args args = {
1283 .ctime = NO_CHANGE_64,
1284 .atime = NO_CHANGE_64,
1285 .mtime = NO_CHANGE_64,
1288 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1289 args.uid = (__u64)current_fsuid();
1290 if (inode->i_mode & S_ISGID)
1291 args.gid = (__u64)inode->i_gid;
1293 args.gid = (__u64)current_fsgid();
1295 args.uid = NO_CHANGE_64;
1296 args.gid = NO_CHANGE_64;
1298 CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, &args,
1300 cifs_sb->mnt_cifs_flags &
1301 CIFS_MOUNT_MAP_SPECIAL_CHR);
1303 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
1304 (mode & S_IWUGO) == 0) {
1305 FILE_BASIC_INFO pInfo;
1306 struct cifsInodeInfo *cifsInode;
1309 memset(&pInfo, 0, sizeof(pInfo));
1310 cifsInode = CIFS_I(newinode);
1311 dosattrs = cifsInode->cifsAttrs|ATTR_READONLY;
1312 pInfo.Attributes = cpu_to_le32(dosattrs);
1313 tmprc = CIFSSMBSetPathInfo(xid, pTcon,
1316 cifs_sb->mnt_cifs_flags &
1317 CIFS_MOUNT_MAP_SPECIAL_CHR);
1319 cifsInode->cifsAttrs = dosattrs;
1321 if (direntry->d_inode) {
1322 if (cifs_sb->mnt_cifs_flags &
1324 direntry->d_inode->i_mode =
1327 if (cifs_sb->mnt_cifs_flags &
1328 CIFS_MOUNT_SET_UID) {
1329 direntry->d_inode->i_uid =
1331 if (inode->i_mode & S_ISGID)
1332 direntry->d_inode->i_gid =
1335 direntry->d_inode->i_gid =
1347 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1351 struct cifs_sb_info *cifs_sb;
1352 struct cifsTconInfo *pTcon;
1353 char *full_path = NULL;
1354 struct cifsInodeInfo *cifsInode;
1356 cFYI(1, "cifs_rmdir, inode = 0x%p", inode);
1360 cifs_sb = CIFS_SB(inode->i_sb);
1361 pTcon = cifs_sb->tcon;
1363 full_path = build_path_from_dentry(direntry);
1364 if (full_path == NULL) {
1370 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1371 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1375 spin_lock(&direntry->d_inode->i_lock);
1376 i_size_write(direntry->d_inode, 0);
1377 clear_nlink(direntry->d_inode);
1378 spin_unlock(&direntry->d_inode->i_lock);
1381 cifsInode = CIFS_I(direntry->d_inode);
1382 cifsInode->time = 0; /* force revalidate to go get info when
1385 cifsInode = CIFS_I(inode);
1386 cifsInode->time = 0; /* force revalidate to get parent dir info
1387 since cached search results now invalid */
1389 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1390 current_fs_time(inode->i_sb);
1398 cifs_do_rename(int xid, struct dentry *from_dentry, const char *fromPath,
1399 struct dentry *to_dentry, const char *toPath)
1401 struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb);
1402 struct cifsTconInfo *pTcon = cifs_sb->tcon;
1406 /* try path-based rename first */
1407 rc = CIFSSMBRename(xid, pTcon, fromPath, toPath, cifs_sb->local_nls,
1408 cifs_sb->mnt_cifs_flags &
1409 CIFS_MOUNT_MAP_SPECIAL_CHR);
1412 * don't bother with rename by filehandle unless file is busy and
1413 * source Note that cross directory moves do not work with
1414 * rename by filehandle to various Windows servers.
1416 if (rc == 0 || rc != -ETXTBSY)
1419 /* open-file renames don't work across directories */
1420 if (to_dentry->d_parent != from_dentry->d_parent)
1423 /* open the file to be renamed -- we need DELETE perms */
1424 rc = CIFSSMBOpen(xid, pTcon, fromPath, FILE_OPEN, DELETE,
1425 CREATE_NOT_DIR, &srcfid, &oplock, NULL,
1426 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
1427 CIFS_MOUNT_MAP_SPECIAL_CHR);
1430 rc = CIFSSMBRenameOpenFile(xid, pTcon, srcfid,
1431 (const char *) to_dentry->d_name.name,
1432 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
1433 CIFS_MOUNT_MAP_SPECIAL_CHR);
1435 CIFSSMBClose(xid, pTcon, srcfid);
1441 int cifs_rename(struct inode *source_dir, struct dentry *source_dentry,
1442 struct inode *target_dir, struct dentry *target_dentry)
1444 char *fromName = NULL;
1445 char *toName = NULL;
1446 struct cifs_sb_info *cifs_sb_source;
1447 struct cifs_sb_info *cifs_sb_target;
1448 struct cifsTconInfo *tcon;
1449 FILE_UNIX_BASIC_INFO *info_buf_source = NULL;
1450 FILE_UNIX_BASIC_INFO *info_buf_target;
1453 cifs_sb_target = CIFS_SB(target_dir->i_sb);
1454 cifs_sb_source = CIFS_SB(source_dir->i_sb);
1455 tcon = cifs_sb_source->tcon;
1460 * BB: this might be allowed if same server, but different share.
1461 * Consider adding support for this
1463 if (tcon != cifs_sb_target->tcon) {
1465 goto cifs_rename_exit;
1469 * we already have the rename sem so we do not need to
1470 * grab it again here to protect the path integrity
1472 fromName = build_path_from_dentry(source_dentry);
1473 if (fromName == NULL) {
1475 goto cifs_rename_exit;
1478 toName = build_path_from_dentry(target_dentry);
1479 if (toName == NULL) {
1481 goto cifs_rename_exit;
1484 rc = cifs_do_rename(xid, source_dentry, fromName,
1485 target_dentry, toName);
1487 if (rc == -EEXIST && tcon->unix_ext) {
1489 * Are src and dst hardlinks of same inode? We can
1490 * only tell with unix extensions enabled
1493 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO),
1495 if (info_buf_source == NULL) {
1497 goto cifs_rename_exit;
1500 info_buf_target = info_buf_source + 1;
1501 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, fromName,
1503 cifs_sb_source->local_nls,
1504 cifs_sb_source->mnt_cifs_flags &
1505 CIFS_MOUNT_MAP_SPECIAL_CHR);
1509 tmprc = CIFSSMBUnixQPathInfo(xid, tcon,
1510 toName, info_buf_target,
1511 cifs_sb_target->local_nls,
1512 /* remap based on source sb */
1513 cifs_sb_source->mnt_cifs_flags &
1514 CIFS_MOUNT_MAP_SPECIAL_CHR);
1516 if (tmprc == 0 && (info_buf_source->UniqueId ==
1517 info_buf_target->UniqueId)) {
1518 /* same file, POSIX says that this is a noop */
1520 goto cifs_rename_exit;
1522 } /* else ... BB we could add the same check for Windows by
1523 checking the UniqueId via FILE_INTERNAL_INFO */
1526 /* Try unlinking the target dentry if it's not negative */
1527 if (target_dentry->d_inode && (rc == -EACCES || rc == -EEXIST)) {
1528 tmprc = cifs_unlink(target_dir, target_dentry);
1530 goto cifs_rename_exit;
1532 rc = cifs_do_rename(xid, source_dentry, fromName,
1533 target_dentry, toName);
1537 kfree(info_buf_source);
1545 cifs_inode_needs_reval(struct inode *inode)
1547 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
1549 if (cifs_i->clientCanCacheRead)
1552 if (!lookupCacheEnabled)
1555 if (cifs_i->time == 0)
1558 /* FIXME: the actimeo should be tunable */
1559 if (time_after_eq(jiffies, cifs_i->time + HZ))
1562 /* hardlinked files w/ noserverino get "special" treatment */
1563 if (!(CIFS_SB(inode->i_sb)->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) &&
1564 S_ISREG(inode->i_mode) && inode->i_nlink != 1)
1570 /* check invalid_mapping flag and zap the cache if it's set */
1572 cifs_invalidate_mapping(struct inode *inode)
1575 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
1577 cifs_i->invalid_mapping = false;
1579 /* write back any cached data */
1580 if (inode->i_mapping && inode->i_mapping->nrpages != 0) {
1581 rc = filemap_write_and_wait(inode->i_mapping);
1583 cifs_i->write_behind_rc = rc;
1585 invalidate_remote_inode(inode);
1586 cifs_fscache_reset_inode_cookie(inode);
1589 int cifs_revalidate_file(struct file *filp)
1592 struct inode *inode = filp->f_path.dentry->d_inode;
1594 if (!cifs_inode_needs_reval(inode))
1597 if (CIFS_SB(inode->i_sb)->tcon->unix_ext)
1598 rc = cifs_get_file_info_unix(filp);
1600 rc = cifs_get_file_info(filp);
1603 if (CIFS_I(inode)->invalid_mapping)
1604 cifs_invalidate_mapping(inode);
1609 /* revalidate a dentry's inode attributes */
1610 int cifs_revalidate_dentry(struct dentry *dentry)
1614 char *full_path = NULL;
1615 struct inode *inode = dentry->d_inode;
1616 struct super_block *sb = dentry->d_sb;
1623 if (!cifs_inode_needs_reval(inode))
1626 /* can not safely grab the rename sem here if rename calls revalidate
1627 since that would deadlock */
1628 full_path = build_path_from_dentry(dentry);
1629 if (full_path == NULL) {
1634 cFYI(1, "Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1635 "jiffies %ld", full_path, inode, inode->i_count.counter,
1636 dentry, dentry->d_time, jiffies);
1638 if (CIFS_SB(sb)->tcon->unix_ext)
1639 rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid);
1641 rc = cifs_get_inode_info(&inode, full_path, NULL, sb,
1645 if (CIFS_I(inode)->invalid_mapping)
1646 cifs_invalidate_mapping(inode);
1653 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1656 int err = cifs_revalidate_dentry(dentry);
1658 generic_fillattr(dentry->d_inode, stat);
1659 stat->blksize = CIFS_MAX_MSGSIZE;
1660 stat->ino = CIFS_I(dentry->d_inode)->uniqueid;
1665 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1667 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1668 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1672 page = grab_cache_page(mapping, index);
1676 zero_user_segment(page, offset, PAGE_CACHE_SIZE);
1678 page_cache_release(page);
1682 static int cifs_vmtruncate(struct inode *inode, loff_t offset)
1687 spin_lock(&inode->i_lock);
1688 err = inode_newsize_ok(inode, offset);
1690 spin_unlock(&inode->i_lock);
1694 oldsize = inode->i_size;
1695 i_size_write(inode, offset);
1696 spin_unlock(&inode->i_lock);
1697 truncate_pagecache(inode, oldsize, offset);
1698 if (inode->i_op->truncate)
1699 inode->i_op->truncate(inode);
1705 cifs_set_file_size(struct inode *inode, struct iattr *attrs,
1706 int xid, char *full_path)
1709 struct cifsFileInfo *open_file;
1710 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1711 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1712 struct cifsTconInfo *pTcon = cifs_sb->tcon;
1715 * To avoid spurious oplock breaks from server, in the case of
1716 * inodes that we already have open, avoid doing path based
1717 * setting of file size if we can do it by handle.
1718 * This keeps our caching token (oplock) and avoids timeouts
1719 * when the local oplock break takes longer to flush
1720 * writebehind data than the SMB timeout for the SetPathInfo
1721 * request would allow
1723 open_file = find_writable_file(cifsInode);
1725 __u16 nfid = open_file->netfid;
1726 __u32 npid = open_file->pid;
1727 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size, nfid,
1729 cifsFileInfo_put(open_file);
1730 cFYI(1, "SetFSize for attrs rc = %d", rc);
1731 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1732 unsigned int bytes_written;
1733 rc = CIFSSMBWrite(xid, pTcon, nfid, 0, attrs->ia_size,
1734 &bytes_written, NULL, NULL, 1);
1735 cFYI(1, "Wrt seteof rc %d", rc);
1741 /* Set file size by pathname rather than by handle
1742 either because no valid, writeable file handle for
1743 it was found or because there was an error setting
1745 rc = CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size,
1746 false, cifs_sb->local_nls,
1747 cifs_sb->mnt_cifs_flags &
1748 CIFS_MOUNT_MAP_SPECIAL_CHR);
1749 cFYI(1, "SetEOF by path (setattrs) rc = %d", rc);
1750 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1754 rc = SMBLegacyOpen(xid, pTcon, full_path,
1755 FILE_OPEN, GENERIC_WRITE,
1756 CREATE_NOT_DIR, &netfid, &oplock, NULL,
1758 cifs_sb->mnt_cifs_flags &
1759 CIFS_MOUNT_MAP_SPECIAL_CHR);
1761 unsigned int bytes_written;
1762 rc = CIFSSMBWrite(xid, pTcon, netfid, 0,
1764 &bytes_written, NULL,
1766 cFYI(1, "wrt seteof rc %d", rc);
1767 CIFSSMBClose(xid, pTcon, netfid);
1773 cifsInode->server_eof = attrs->ia_size;
1774 rc = cifs_vmtruncate(inode, attrs->ia_size);
1775 cifs_truncate_page(inode->i_mapping, inode->i_size);
1782 cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
1786 char *full_path = NULL;
1787 struct inode *inode = direntry->d_inode;
1788 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1789 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1790 struct cifsTconInfo *pTcon = cifs_sb->tcon;
1791 struct cifs_unix_set_info_args *args = NULL;
1792 struct cifsFileInfo *open_file;
1794 cFYI(1, "setattr_unix on file %s attrs->ia_valid=0x%x",
1795 direntry->d_name.name, attrs->ia_valid);
1799 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1800 /* check if we have permission to change attrs */
1801 rc = inode_change_ok(inode, attrs);
1808 full_path = build_path_from_dentry(direntry);
1809 if (full_path == NULL) {
1815 * Attempt to flush data before changing attributes. We need to do
1816 * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the
1817 * ownership or mode then we may also need to do this. Here, we take
1818 * the safe way out and just do the flush on all setattr requests. If
1819 * the flush returns error, store it to report later and continue.
1821 * BB: This should be smarter. Why bother flushing pages that
1822 * will be truncated anyway? Also, should we error out here if
1823 * the flush returns error?
1825 rc = filemap_write_and_wait(inode->i_mapping);
1827 cifsInode->write_behind_rc = rc;
1831 if (attrs->ia_valid & ATTR_SIZE) {
1832 rc = cifs_set_file_size(inode, attrs, xid, full_path);
1837 /* skip mode change if it's just for clearing setuid/setgid */
1838 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1839 attrs->ia_valid &= ~ATTR_MODE;
1841 args = kmalloc(sizeof(*args), GFP_KERNEL);
1847 /* set up the struct */
1848 if (attrs->ia_valid & ATTR_MODE)
1849 args->mode = attrs->ia_mode;
1851 args->mode = NO_CHANGE_64;
1853 if (attrs->ia_valid & ATTR_UID)
1854 args->uid = attrs->ia_uid;
1856 args->uid = NO_CHANGE_64;
1858 if (attrs->ia_valid & ATTR_GID)
1859 args->gid = attrs->ia_gid;
1861 args->gid = NO_CHANGE_64;
1863 if (attrs->ia_valid & ATTR_ATIME)
1864 args->atime = cifs_UnixTimeToNT(attrs->ia_atime);
1866 args->atime = NO_CHANGE_64;
1868 if (attrs->ia_valid & ATTR_MTIME)
1869 args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime);
1871 args->mtime = NO_CHANGE_64;
1873 if (attrs->ia_valid & ATTR_CTIME)
1874 args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime);
1876 args->ctime = NO_CHANGE_64;
1879 open_file = find_writable_file(cifsInode);
1881 u16 nfid = open_file->netfid;
1882 u32 npid = open_file->pid;
1883 rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid);
1884 cifsFileInfo_put(open_file);
1886 rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args,
1888 cifs_sb->mnt_cifs_flags &
1889 CIFS_MOUNT_MAP_SPECIAL_CHR);
1893 rc = inode_setattr(inode, attrs);
1895 /* force revalidate when any of these times are set since some
1896 of the fs types (eg ext3, fat) do not have fine enough
1897 time granularity to match protocol, and we do not have a
1898 a way (yet) to query the server fs's time granularity (and
1899 whether it rounds times down).
1901 if (!rc && (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME)))
1902 cifsInode->time = 0;
1912 cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
1915 struct inode *inode = direntry->d_inode;
1916 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1917 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1918 char *full_path = NULL;
1921 __u64 mode = NO_CHANGE_64;
1925 cFYI(1, "setattr on file %s attrs->iavalid 0x%x",
1926 direntry->d_name.name, attrs->ia_valid);
1928 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1929 /* check if we have permission to change attrs */
1930 rc = inode_change_ok(inode, attrs);
1938 full_path = build_path_from_dentry(direntry);
1939 if (full_path == NULL) {
1946 * Attempt to flush data before changing attributes. We need to do
1947 * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the
1948 * ownership or mode then we may also need to do this. Here, we take
1949 * the safe way out and just do the flush on all setattr requests. If
1950 * the flush returns error, store it to report later and continue.
1952 * BB: This should be smarter. Why bother flushing pages that
1953 * will be truncated anyway? Also, should we error out here if
1954 * the flush returns error?
1956 rc = filemap_write_and_wait(inode->i_mapping);
1958 cifsInode->write_behind_rc = rc;
1962 if (attrs->ia_valid & ATTR_SIZE) {
1963 rc = cifs_set_file_size(inode, attrs, xid, full_path);
1965 goto cifs_setattr_exit;
1969 * Without unix extensions we can't send ownership changes to the
1970 * server, so silently ignore them. This is consistent with how
1971 * local DOS/Windows filesystems behave (VFAT, NTFS, etc). With
1972 * CIFSACL support + proper Windows to Unix idmapping, we may be
1973 * able to support this in the future.
1975 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID))
1976 attrs->ia_valid &= ~(ATTR_UID | ATTR_GID);
1978 /* skip mode change if it's just for clearing setuid/setgid */
1979 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1980 attrs->ia_valid &= ~ATTR_MODE;
1982 if (attrs->ia_valid & ATTR_MODE) {
1983 cFYI(1, "Mode changed to 0%o", attrs->ia_mode);
1984 mode = attrs->ia_mode;
1987 if (attrs->ia_valid & ATTR_MODE) {
1989 #ifdef CONFIG_CIFS_EXPERIMENTAL
1990 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
1991 rc = mode_to_acl(inode, full_path, mode);
1994 if (((mode & S_IWUGO) == 0) &&
1995 (cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
1997 dosattr = cifsInode->cifsAttrs | ATTR_READONLY;
1999 /* fix up mode if we're not using dynperm */
2000 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
2001 attrs->ia_mode = inode->i_mode & ~S_IWUGO;
2002 } else if ((mode & S_IWUGO) &&
2003 (cifsInode->cifsAttrs & ATTR_READONLY)) {
2005 dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
2006 /* Attributes of 0 are ignored */
2008 dosattr |= ATTR_NORMAL;
2010 /* reset local inode permissions to normal */
2011 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2012 attrs->ia_mode &= ~(S_IALLUGO);
2013 if (S_ISDIR(inode->i_mode))
2015 cifs_sb->mnt_dir_mode;
2018 cifs_sb->mnt_file_mode;
2020 } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2021 /* ignore mode change - ATTR_READONLY hasn't changed */
2022 attrs->ia_valid &= ~ATTR_MODE;
2026 if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) ||
2027 ((attrs->ia_valid & ATTR_MODE) && dosattr)) {
2028 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
2029 /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */
2031 /* Even if error on time set, no sense failing the call if
2032 the server would set the time to a reasonable value anyway,
2033 and this check ensures that we are not being called from
2034 sys_utimes in which case we ought to fail the call back to
2035 the user when the server rejects the call */
2036 if ((rc) && (attrs->ia_valid &
2037 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
2041 /* do not need local check to inode_check_ok since the server does
2044 rc = inode_setattr(inode, attrs);
2052 cifs_setattr(struct dentry *direntry, struct iattr *attrs)
2054 struct inode *inode = direntry->d_inode;
2055 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2056 struct cifsTconInfo *pTcon = cifs_sb->tcon;
2058 if (pTcon->unix_ext)
2059 return cifs_setattr_unix(direntry, attrs);
2061 return cifs_setattr_nounix(direntry, attrs);
2063 /* BB: add cifs_setattr_legacy for really old servers */
2067 void cifs_delete_inode(struct inode *inode)
2069 cFYI(1, "In cifs_delete_inode, inode = 0x%p", inode);
2070 /* may have to add back in if and when safe distributed caching of
2071 directories added e.g. via FindNotify */