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)
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_STRICT_IO) {
48 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
49 inode->i_fop = &cifs_file_strict_nobrl_ops;
51 inode->i_fop = &cifs_file_strict_ops;
52 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
53 inode->i_fop = &cifs_file_nobrl_ops;
54 else { /* not direct, send byte range locks */
55 inode->i_fop = &cifs_file_ops;
58 /* check if server can support readpages */
59 if (cifs_sb_master_tcon(cifs_sb)->ses->server->maxBuf <
60 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
61 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
63 inode->i_data.a_ops = &cifs_addr_ops;
66 #ifdef CONFIG_CIFS_DFS_UPCALL
67 if (IS_AUTOMOUNT(inode)) {
68 inode->i_op = &cifs_dfs_referral_inode_operations;
70 #else /* NO DFS support, treat as a directory */
73 inode->i_op = &cifs_dir_inode_ops;
74 inode->i_fop = &cifs_dir_ops;
78 inode->i_op = &cifs_symlink_inode_ops;
81 init_special_inode(inode, inode->i_mode, inode->i_rdev);
86 /* check inode attributes against fattr. If they don't match, tag the
87 * inode for cache invalidation
90 cifs_revalidate_cache(struct inode *inode, struct cifs_fattr *fattr)
92 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
94 cFYI(1, "%s: revalidating inode %llu", __func__, cifs_i->uniqueid);
96 if (inode->i_state & I_NEW) {
97 cFYI(1, "%s: inode %llu is new", __func__, cifs_i->uniqueid);
101 /* don't bother with revalidation if we have an oplock */
102 if (cifs_i->clientCanCacheRead) {
103 cFYI(1, "%s: inode %llu is oplocked", __func__,
108 /* revalidate if mtime or size have changed */
109 if (timespec_equal(&inode->i_mtime, &fattr->cf_mtime) &&
110 cifs_i->server_eof == fattr->cf_eof) {
111 cFYI(1, "%s: inode %llu is unchanged", __func__,
116 cFYI(1, "%s: invalidating inode %llu mapping", __func__,
118 cifs_i->invalid_mapping = true;
121 /* populate an inode with info from a cifs_fattr struct */
123 cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr)
125 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
126 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
128 cifs_revalidate_cache(inode, fattr);
130 spin_lock(&inode->i_lock);
131 inode->i_atime = fattr->cf_atime;
132 inode->i_mtime = fattr->cf_mtime;
133 inode->i_ctime = fattr->cf_ctime;
134 inode->i_rdev = fattr->cf_rdev;
135 set_nlink(inode, fattr->cf_nlink);
136 inode->i_uid = fattr->cf_uid;
137 inode->i_gid = fattr->cf_gid;
139 /* if dynperm is set, don't clobber existing mode */
140 if (inode->i_state & I_NEW ||
141 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM))
142 inode->i_mode = fattr->cf_mode;
144 cifs_i->cifsAttrs = fattr->cf_cifsattrs;
146 if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL)
149 cifs_i->time = jiffies;
151 cifs_i->delete_pending = fattr->cf_flags & CIFS_FATTR_DELETE_PENDING;
153 cifs_i->server_eof = fattr->cf_eof;
155 * Can't safely change the file size here if the client is writing to
156 * it due to potential races.
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 if (fattr->cf_flags & CIFS_FATTR_DFS_REFERRAL)
171 inode->i_flags |= S_AUTOMOUNT;
176 cifs_fill_uniqueid(struct super_block *sb, struct cifs_fattr *fattr)
178 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
180 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
183 fattr->cf_uniqueid = iunique(sb, ROOT_I);
186 /* Fill a cifs_fattr struct with info from FILE_UNIX_BASIC_INFO. */
188 cifs_unix_basic_to_fattr(struct cifs_fattr *fattr, FILE_UNIX_BASIC_INFO *info,
189 struct cifs_sb_info *cifs_sb)
191 memset(fattr, 0, sizeof(*fattr));
192 fattr->cf_uniqueid = le64_to_cpu(info->UniqueId);
193 fattr->cf_bytes = le64_to_cpu(info->NumOfBytes);
194 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
196 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
197 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastModificationTime);
198 fattr->cf_ctime = cifs_NTtimeToUnix(info->LastStatusChange);
199 fattr->cf_mode = le64_to_cpu(info->Permissions);
202 * Since we set the inode type below we need to mask off
203 * to avoid strange results if bits set above.
205 fattr->cf_mode &= ~S_IFMT;
206 switch (le32_to_cpu(info->Type)) {
208 fattr->cf_mode |= S_IFREG;
209 fattr->cf_dtype = DT_REG;
212 fattr->cf_mode |= S_IFLNK;
213 fattr->cf_dtype = DT_LNK;
216 fattr->cf_mode |= S_IFDIR;
217 fattr->cf_dtype = DT_DIR;
220 fattr->cf_mode |= S_IFCHR;
221 fattr->cf_dtype = DT_CHR;
222 fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor),
223 le64_to_cpu(info->DevMinor) & MINORMASK);
226 fattr->cf_mode |= S_IFBLK;
227 fattr->cf_dtype = DT_BLK;
228 fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor),
229 le64_to_cpu(info->DevMinor) & MINORMASK);
232 fattr->cf_mode |= S_IFIFO;
233 fattr->cf_dtype = DT_FIFO;
236 fattr->cf_mode |= S_IFSOCK;
237 fattr->cf_dtype = DT_SOCK;
240 /* safest to call it a file if we do not know */
241 fattr->cf_mode |= S_IFREG;
242 fattr->cf_dtype = DT_REG;
243 cFYI(1, "unknown type %d", le32_to_cpu(info->Type));
247 fattr->cf_uid = cifs_sb->mnt_uid;
248 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)) {
249 u64 id = le64_to_cpu(info->Uid);
250 if (id < ((uid_t)-1)) {
251 kuid_t uid = make_kuid(&init_user_ns, id);
257 fattr->cf_gid = cifs_sb->mnt_gid;
258 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)) {
259 u64 id = le64_to_cpu(info->Gid);
260 if (id < ((gid_t)-1)) {
261 kgid_t gid = make_kgid(&init_user_ns, id);
267 fattr->cf_nlink = le64_to_cpu(info->Nlinks);
271 * Fill a cifs_fattr struct with fake inode info.
273 * Needed to setup cifs_fattr data for the directory which is the
274 * junction to the new submount (ie to setup the fake directory
275 * which represents a DFS referral).
278 cifs_create_dfs_fattr(struct cifs_fattr *fattr, struct super_block *sb)
280 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
282 cFYI(1, "creating fake fattr for DFS referral");
284 memset(fattr, 0, sizeof(*fattr));
285 fattr->cf_mode = S_IFDIR | S_IXUGO | S_IRWXU;
286 fattr->cf_uid = cifs_sb->mnt_uid;
287 fattr->cf_gid = cifs_sb->mnt_gid;
288 fattr->cf_atime = CURRENT_TIME;
289 fattr->cf_ctime = CURRENT_TIME;
290 fattr->cf_mtime = CURRENT_TIME;
292 fattr->cf_flags |= CIFS_FATTR_DFS_REFERRAL;
296 cifs_get_file_info_unix(struct file *filp)
300 FILE_UNIX_BASIC_INFO find_data;
301 struct cifs_fattr fattr;
302 struct inode *inode = filp->f_path.dentry->d_inode;
303 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
304 struct cifsFileInfo *cfile = filp->private_data;
305 struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
308 rc = CIFSSMBUnixQFileInfo(xid, tcon, cfile->fid.netfid, &find_data);
310 cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb);
311 } else if (rc == -EREMOTE) {
312 cifs_create_dfs_fattr(&fattr, inode->i_sb);
316 cifs_fattr_to_inode(inode, &fattr);
321 int cifs_get_inode_info_unix(struct inode **pinode,
322 const unsigned char *full_path,
323 struct super_block *sb, unsigned int xid)
326 FILE_UNIX_BASIC_INFO find_data;
327 struct cifs_fattr fattr;
328 struct cifs_tcon *tcon;
329 struct tcon_link *tlink;
330 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
332 cFYI(1, "Getting info on %s", full_path);
334 tlink = cifs_sb_tlink(cifs_sb);
336 return PTR_ERR(tlink);
337 tcon = tlink_tcon(tlink);
339 /* could have done a find first instead but this returns more info */
340 rc = CIFSSMBUnixQPathInfo(xid, tcon, full_path, &find_data,
341 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
342 CIFS_MOUNT_MAP_SPECIAL_CHR);
343 cifs_put_tlink(tlink);
346 cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb);
347 } else if (rc == -EREMOTE) {
348 cifs_create_dfs_fattr(&fattr, sb);
354 /* check for Minshall+French symlinks */
355 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
356 int tmprc = CIFSCheckMFSymlink(&fattr, full_path, cifs_sb, xid);
358 cFYI(1, "CIFSCheckMFSymlink: %d", tmprc);
361 if (*pinode == NULL) {
363 cifs_fill_uniqueid(sb, &fattr);
364 *pinode = cifs_iget(sb, &fattr);
368 /* we already have inode, update it */
369 cifs_fattr_to_inode(*pinode, &fattr);
376 cifs_sfu_type(struct cifs_fattr *fattr, const unsigned char *path,
377 struct cifs_sb_info *cifs_sb, unsigned int xid)
382 struct tcon_link *tlink;
383 struct cifs_tcon *tcon;
384 struct cifs_io_parms io_parms;
386 unsigned int bytes_read;
391 fattr->cf_mode &= ~S_IFMT;
393 if (fattr->cf_eof == 0) {
394 fattr->cf_mode |= S_IFIFO;
395 fattr->cf_dtype = DT_FIFO;
397 } else if (fattr->cf_eof < 8) {
398 fattr->cf_mode |= S_IFREG;
399 fattr->cf_dtype = DT_REG;
400 return -EINVAL; /* EOPNOTSUPP? */
403 tlink = cifs_sb_tlink(cifs_sb);
405 return PTR_ERR(tlink);
406 tcon = tlink_tcon(tlink);
408 rc = CIFSSMBOpen(xid, tcon, path, FILE_OPEN, GENERIC_READ,
409 CREATE_NOT_DIR, &netfid, &oplock, NULL,
411 cifs_sb->mnt_cifs_flags &
412 CIFS_MOUNT_MAP_SPECIAL_CHR);
414 int buf_type = CIFS_NO_BUFFER;
416 io_parms.netfid = netfid;
417 io_parms.pid = current->tgid;
418 io_parms.tcon = tcon;
420 io_parms.length = 24;
421 rc = CIFSSMBRead(xid, &io_parms, &bytes_read, &pbuf,
423 if ((rc == 0) && (bytes_read >= 8)) {
424 if (memcmp("IntxBLK", pbuf, 8) == 0) {
425 cFYI(1, "Block device");
426 fattr->cf_mode |= S_IFBLK;
427 fattr->cf_dtype = DT_BLK;
428 if (bytes_read == 24) {
429 /* we have enough to decode dev num */
430 __u64 mjr; /* major */
431 __u64 mnr; /* minor */
432 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
433 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
434 fattr->cf_rdev = MKDEV(mjr, mnr);
436 } else if (memcmp("IntxCHR", pbuf, 8) == 0) {
437 cFYI(1, "Char device");
438 fattr->cf_mode |= S_IFCHR;
439 fattr->cf_dtype = DT_CHR;
440 if (bytes_read == 24) {
441 /* we have enough to decode dev num */
442 __u64 mjr; /* major */
443 __u64 mnr; /* minor */
444 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
445 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
446 fattr->cf_rdev = MKDEV(mjr, mnr);
448 } else if (memcmp("IntxLNK", pbuf, 7) == 0) {
450 fattr->cf_mode |= S_IFLNK;
451 fattr->cf_dtype = DT_LNK;
453 fattr->cf_mode |= S_IFREG; /* file? */
454 fattr->cf_dtype = DT_REG;
458 fattr->cf_mode |= S_IFREG; /* then it is a file */
459 fattr->cf_dtype = DT_REG;
460 rc = -EOPNOTSUPP; /* or some unknown SFU type */
462 CIFSSMBClose(xid, tcon, netfid);
464 cifs_put_tlink(tlink);
468 #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
471 * Fetch mode bits as provided by SFU.
473 * FIXME: Doesn't this clobber the type bit we got from cifs_sfu_type ?
475 static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path,
476 struct cifs_sb_info *cifs_sb, unsigned int xid)
478 #ifdef CONFIG_CIFS_XATTR
482 struct tcon_link *tlink;
483 struct cifs_tcon *tcon;
485 tlink = cifs_sb_tlink(cifs_sb);
487 return PTR_ERR(tlink);
488 tcon = tlink_tcon(tlink);
490 rc = CIFSSMBQAllEAs(xid, tcon, path, "SETFILEBITS",
491 ea_value, 4 /* size of buf */, cifs_sb->local_nls,
492 cifs_sb->mnt_cifs_flags &
493 CIFS_MOUNT_MAP_SPECIAL_CHR);
494 cifs_put_tlink(tlink);
498 mode = le32_to_cpu(*((__le32 *)ea_value));
499 fattr->cf_mode &= ~SFBITS_MASK;
500 cFYI(1, "special bits 0%o org mode 0%o", mode,
502 fattr->cf_mode = (mode & SFBITS_MASK) | fattr->cf_mode;
503 cFYI(1, "special mode bits 0%o", mode);
512 /* Fill a cifs_fattr struct with info from FILE_ALL_INFO */
514 cifs_all_info_to_fattr(struct cifs_fattr *fattr, FILE_ALL_INFO *info,
515 struct cifs_sb_info *cifs_sb, bool adjust_tz)
517 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
519 memset(fattr, 0, sizeof(*fattr));
520 fattr->cf_cifsattrs = le32_to_cpu(info->Attributes);
521 if (info->DeletePending)
522 fattr->cf_flags |= CIFS_FATTR_DELETE_PENDING;
524 if (info->LastAccessTime)
525 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
527 fattr->cf_atime = CURRENT_TIME;
529 fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime);
530 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);
533 fattr->cf_ctime.tv_sec += tcon->ses->server->timeAdj;
534 fattr->cf_mtime.tv_sec += tcon->ses->server->timeAdj;
537 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
538 fattr->cf_bytes = le64_to_cpu(info->AllocationSize);
539 fattr->cf_createtime = le64_to_cpu(info->CreationTime);
541 if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
542 fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode;
543 fattr->cf_dtype = DT_DIR;
545 * Server can return wrong NumberOfLinks value for directories
546 * when Unix extensions are disabled - fake it.
550 fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode;
551 fattr->cf_dtype = DT_REG;
553 /* clear write bits if ATTR_READONLY is set */
554 if (fattr->cf_cifsattrs & ATTR_READONLY)
555 fattr->cf_mode &= ~(S_IWUGO);
557 fattr->cf_nlink = le32_to_cpu(info->NumberOfLinks);
560 fattr->cf_uid = cifs_sb->mnt_uid;
561 fattr->cf_gid = cifs_sb->mnt_gid;
565 cifs_get_file_info(struct file *filp)
569 FILE_ALL_INFO find_data;
570 struct cifs_fattr fattr;
571 struct inode *inode = filp->f_path.dentry->d_inode;
572 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
573 struct cifsFileInfo *cfile = filp->private_data;
574 struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
575 struct TCP_Server_Info *server = tcon->ses->server;
577 if (!server->ops->query_file_info)
581 rc = server->ops->query_file_info(xid, tcon, &cfile->fid, &find_data);
584 cifs_all_info_to_fattr(&fattr, &find_data, cifs_sb, false);
587 cifs_create_dfs_fattr(&fattr, inode->i_sb);
593 * FIXME: legacy server -- fall back to path-based call?
594 * for now, just skip revalidating and mark inode for
598 CIFS_I(inode)->time = 0;
604 * don't bother with SFU junk here -- just mark inode as needing
607 fattr.cf_uniqueid = CIFS_I(inode)->uniqueid;
608 fattr.cf_flags |= CIFS_FATTR_NEED_REVAL;
609 cifs_fattr_to_inode(inode, &fattr);
616 cifs_get_inode_info(struct inode **inode, const char *full_path,
617 FILE_ALL_INFO *data, struct super_block *sb, int xid,
620 bool validinum = false;
622 int rc = 0, tmprc = ENOSYS;
623 struct cifs_tcon *tcon;
624 struct TCP_Server_Info *server;
625 struct tcon_link *tlink;
626 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
628 bool adjust_tz = false;
629 struct cifs_fattr fattr;
630 struct cifs_search_info *srchinf = NULL;
632 tlink = cifs_sb_tlink(cifs_sb);
634 return PTR_ERR(tlink);
635 tcon = tlink_tcon(tlink);
636 server = tcon->ses->server;
638 cFYI(1, "Getting info on %s", full_path);
640 if ((data == NULL) && (*inode != NULL)) {
641 if (CIFS_I(*inode)->clientCanCacheRead) {
642 cFYI(1, "No need to revalidate cached inode sizes");
647 /* if inode info is not passed, get it from server */
649 if (!server->ops->query_path_info) {
653 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
658 data = (FILE_ALL_INFO *)buf;
659 rc = server->ops->query_path_info(xid, tcon, cifs_sb, full_path,
664 cifs_all_info_to_fattr(&fattr, (FILE_ALL_INFO *)data, cifs_sb,
666 } else if (rc == -EREMOTE) {
667 cifs_create_dfs_fattr(&fattr, sb);
669 } else if (rc == -EACCES && backup_cred(cifs_sb)) {
670 srchinf = kzalloc(sizeof(struct cifs_search_info),
672 if (srchinf == NULL) {
677 srchinf->endOfSearch = false;
678 srchinf->info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
680 srchflgs = CIFS_SEARCH_CLOSE_ALWAYS |
681 CIFS_SEARCH_CLOSE_AT_END |
682 CIFS_SEARCH_BACKUP_SEARCH;
684 rc = CIFSFindFirst(xid, tcon, full_path,
685 cifs_sb, NULL, srchflgs, srchinf, false);
688 (FILE_ALL_INFO *)srchinf->srch_entries_start;
690 cifs_dir_info_to_fattr(&fattr,
691 (FILE_DIRECTORY_INFO *)data, cifs_sb);
692 fattr.cf_uniqueid = le64_to_cpu(
693 ((SEARCH_ID_FULL_DIR_INFO *)data)->UniqueId);
696 cifs_buf_release(srchinf->ntwrk_buf_start);
703 * If an inode wasn't passed in, then get the inode number
705 * Is an i_ino of zero legal? Can we use that to check if the server
706 * supports returning inode numbers? Are there other sanity checks we
707 * can use to ensure that the server is really filling in that field?
709 if (*inode == NULL) {
710 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
711 if (validinum == false) {
712 if (server->ops->get_srv_inum)
713 tmprc = server->ops->get_srv_inum(xid,
714 tcon, cifs_sb, full_path,
715 &fattr.cf_uniqueid, data);
717 cFYI(1, "GetSrvInodeNum rc %d", tmprc);
718 fattr.cf_uniqueid = iunique(sb, ROOT_I);
719 cifs_autodisable_serverino(cifs_sb);
723 fattr.cf_uniqueid = iunique(sb, ROOT_I);
725 fattr.cf_uniqueid = CIFS_I(*inode)->uniqueid;
727 /* query for SFU type info if supported and needed */
728 if (fattr.cf_cifsattrs & ATTR_SYSTEM &&
729 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
730 tmprc = cifs_sfu_type(&fattr, full_path, cifs_sb, xid);
732 cFYI(1, "cifs_sfu_type failed: %d", tmprc);
735 #ifdef CONFIG_CIFS_ACL
736 /* fill in 0777 bits from ACL */
737 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
738 rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, full_path, fid);
740 cFYI(1, "%s: Getting ACL failed with error: %d",
745 #endif /* CONFIG_CIFS_ACL */
747 /* fill in remaining high mode bits e.g. SUID, VTX */
748 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
749 cifs_sfu_mode(&fattr, full_path, cifs_sb, xid);
751 /* check for Minshall+French symlinks */
752 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
753 tmprc = CIFSCheckMFSymlink(&fattr, full_path, cifs_sb, xid);
755 cFYI(1, "CIFSCheckMFSymlink: %d", tmprc);
759 *inode = cifs_iget(sb, &fattr);
763 cifs_fattr_to_inode(*inode, &fattr);
768 cifs_put_tlink(tlink);
772 static const struct inode_operations cifs_ipc_inode_ops = {
773 .lookup = cifs_lookup,
777 cifs_find_inode(struct inode *inode, void *opaque)
779 struct cifs_fattr *fattr = (struct cifs_fattr *) opaque;
781 /* don't match inode with different uniqueid */
782 if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid)
785 /* use createtime like an i_generation field */
786 if (CIFS_I(inode)->createtime != fattr->cf_createtime)
789 /* don't match inode of different type */
790 if ((inode->i_mode & S_IFMT) != (fattr->cf_mode & S_IFMT))
793 /* if it's not a directory or has no dentries, then flag it */
794 if (S_ISDIR(inode->i_mode) && !hlist_empty(&inode->i_dentry))
795 fattr->cf_flags |= CIFS_FATTR_INO_COLLISION;
801 cifs_init_inode(struct inode *inode, void *opaque)
803 struct cifs_fattr *fattr = (struct cifs_fattr *) opaque;
805 CIFS_I(inode)->uniqueid = fattr->cf_uniqueid;
806 CIFS_I(inode)->createtime = fattr->cf_createtime;
811 * walk dentry list for an inode and report whether it has aliases that
812 * are hashed. We use this to determine if a directory inode can actually
816 inode_has_hashed_dentries(struct inode *inode)
818 struct dentry *dentry;
819 struct hlist_node *p;
821 spin_lock(&inode->i_lock);
822 hlist_for_each_entry(dentry, p, &inode->i_dentry, d_alias) {
823 if (!d_unhashed(dentry) || IS_ROOT(dentry)) {
824 spin_unlock(&inode->i_lock);
828 spin_unlock(&inode->i_lock);
832 /* Given fattrs, get a corresponding inode */
834 cifs_iget(struct super_block *sb, struct cifs_fattr *fattr)
840 cFYI(1, "looking for uniqueid=%llu", fattr->cf_uniqueid);
842 /* hash down to 32-bits on 32-bit arch */
843 hash = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid);
845 inode = iget5_locked(sb, hash, cifs_find_inode, cifs_init_inode, fattr);
847 /* was there a potentially problematic inode collision? */
848 if (fattr->cf_flags & CIFS_FATTR_INO_COLLISION) {
849 fattr->cf_flags &= ~CIFS_FATTR_INO_COLLISION;
851 if (inode_has_hashed_dentries(inode)) {
852 cifs_autodisable_serverino(CIFS_SB(sb));
854 fattr->cf_uniqueid = iunique(sb, ROOT_I);
855 goto retry_iget5_locked;
859 cifs_fattr_to_inode(inode, fattr);
860 if (sb->s_flags & MS_NOATIME)
861 inode->i_flags |= S_NOATIME | S_NOCMTIME;
862 if (inode->i_state & I_NEW) {
864 if (S_ISREG(inode->i_mode))
865 inode->i_data.backing_dev_info = sb->s_bdi;
866 #ifdef CONFIG_CIFS_FSCACHE
867 /* initialize per-inode cache cookie pointer */
868 CIFS_I(inode)->fscache = NULL;
870 unlock_new_inode(inode);
877 /* gets root inode */
878 struct inode *cifs_root_iget(struct super_block *sb)
881 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
882 struct inode *inode = NULL;
884 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
888 rc = cifs_get_inode_info_unix(&inode, "", sb, xid);
890 rc = cifs_get_inode_info(&inode, "", NULL, sb, xid, NULL);
897 #ifdef CONFIG_CIFS_FSCACHE
898 /* populate tcon->resource_id */
899 tcon->resource_id = CIFS_I(inode)->uniqueid;
902 if (rc && tcon->ipc) {
903 cFYI(1, "ipc connection - fake read inode");
904 spin_lock(&inode->i_lock);
905 inode->i_mode |= S_IFDIR;
907 inode->i_op = &cifs_ipc_inode_ops;
908 inode->i_fop = &simple_dir_operations;
909 inode->i_uid = cifs_sb->mnt_uid;
910 inode->i_gid = cifs_sb->mnt_gid;
911 spin_unlock(&inode->i_lock);
918 /* can not call macro free_xid here since in a void func
919 * TODO: This is no longer true
926 cifs_set_file_info(struct inode *inode, struct iattr *attrs, unsigned int xid,
927 char *full_path, __u32 dosattr)
929 bool set_time = false;
930 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
931 struct TCP_Server_Info *server;
932 FILE_BASIC_INFO info_buf;
937 server = cifs_sb_master_tcon(cifs_sb)->ses->server;
938 if (!server->ops->set_file_info)
941 if (attrs->ia_valid & ATTR_ATIME) {
943 info_buf.LastAccessTime =
944 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
946 info_buf.LastAccessTime = 0;
948 if (attrs->ia_valid & ATTR_MTIME) {
950 info_buf.LastWriteTime =
951 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
953 info_buf.LastWriteTime = 0;
956 * Samba throws this field away, but windows may actually use it.
957 * Do not set ctime unless other time stamps are changed explicitly
958 * (i.e. by utimes()) since we would then have a mix of client and
961 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
962 cFYI(1, "CIFS - CTIME changed");
963 info_buf.ChangeTime =
964 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
966 info_buf.ChangeTime = 0;
968 info_buf.CreationTime = 0; /* don't change */
969 info_buf.Attributes = cpu_to_le32(dosattr);
971 return server->ops->set_file_info(inode, full_path, &info_buf, xid);
975 * Open the given file (if it isn't already), set the DELETE_ON_CLOSE bit
976 * and rename it to a random name that hopefully won't conflict with
980 cifs_rename_pending_delete(const char *full_path, struct dentry *dentry,
981 const unsigned int xid)
986 struct inode *inode = dentry->d_inode;
987 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
988 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
989 struct tcon_link *tlink;
990 struct cifs_tcon *tcon;
991 __u32 dosattr, origattr;
992 FILE_BASIC_INFO *info_buf = NULL;
994 tlink = cifs_sb_tlink(cifs_sb);
996 return PTR_ERR(tlink);
997 tcon = tlink_tcon(tlink);
999 rc = CIFSSMBOpen(xid, tcon, full_path, FILE_OPEN,
1000 DELETE|FILE_WRITE_ATTRIBUTES, CREATE_NOT_DIR,
1001 &netfid, &oplock, NULL, cifs_sb->local_nls,
1002 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1006 origattr = cifsInode->cifsAttrs;
1008 origattr |= ATTR_NORMAL;
1010 dosattr = origattr & ~ATTR_READONLY;
1012 dosattr |= ATTR_NORMAL;
1013 dosattr |= ATTR_HIDDEN;
1015 /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */
1016 if (dosattr != origattr) {
1017 info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL);
1018 if (info_buf == NULL) {
1022 info_buf->Attributes = cpu_to_le32(dosattr);
1023 rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid,
1025 /* although we would like to mark the file hidden
1026 if that fails we will still try to rename it */
1028 cifsInode->cifsAttrs = dosattr;
1030 dosattr = origattr; /* since not able to change them */
1033 /* rename the file */
1034 rc = CIFSSMBRenameOpenFile(xid, tcon, netfid, NULL, cifs_sb->local_nls,
1035 cifs_sb->mnt_cifs_flags &
1036 CIFS_MOUNT_MAP_SPECIAL_CHR);
1042 /* try to set DELETE_ON_CLOSE */
1043 if (!cifsInode->delete_pending) {
1044 rc = CIFSSMBSetFileDisposition(xid, tcon, true, netfid,
1047 * some samba versions return -ENOENT when we try to set the
1048 * file disposition here. Likely a samba bug, but work around
1049 * it for now. This means that some cifsXXX files may hang
1050 * around after they shouldn't.
1052 * BB: remove this hack after more servers have the fix
1060 cifsInode->delete_pending = true;
1064 CIFSSMBClose(xid, tcon, netfid);
1067 cifs_put_tlink(tlink);
1071 * reset everything back to the original state. Don't bother
1072 * dealing with errors here since we can't do anything about
1076 CIFSSMBRenameOpenFile(xid, tcon, netfid, dentry->d_name.name,
1077 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
1078 CIFS_MOUNT_MAP_SPECIAL_CHR);
1080 if (dosattr != origattr) {
1081 info_buf->Attributes = cpu_to_le32(origattr);
1082 if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid,
1084 cifsInode->cifsAttrs = origattr;
1090 /* copied from fs/nfs/dir.c with small changes */
1092 cifs_drop_nlink(struct inode *inode)
1094 spin_lock(&inode->i_lock);
1095 if (inode->i_nlink > 0)
1097 spin_unlock(&inode->i_lock);
1101 * If dentry->d_inode is null (usually meaning the cached dentry
1102 * is a negative dentry) then we would attempt a standard SMB delete, but
1103 * if that fails we can not attempt the fall back mechanisms on EACCESS
1104 * but will return the EACCESS to the caller. Note that the VFS does not call
1105 * unlink on negative dentries currently.
1107 int cifs_unlink(struct inode *dir, struct dentry *dentry)
1111 char *full_path = NULL;
1112 struct inode *inode = dentry->d_inode;
1113 struct cifsInodeInfo *cifs_inode;
1114 struct super_block *sb = dir->i_sb;
1115 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1116 struct tcon_link *tlink;
1117 struct cifs_tcon *tcon;
1118 struct TCP_Server_Info *server;
1119 struct iattr *attrs = NULL;
1120 __u32 dosattr = 0, origattr = 0;
1122 cFYI(1, "cifs_unlink, dir=0x%p, dentry=0x%p", dir, dentry);
1124 tlink = cifs_sb_tlink(cifs_sb);
1126 return PTR_ERR(tlink);
1127 tcon = tlink_tcon(tlink);
1128 server = tcon->ses->server;
1132 /* Unlink can be called from rename so we can not take the
1133 * sb->s_vfs_rename_mutex here */
1134 full_path = build_path_from_dentry(dentry);
1135 if (full_path == NULL) {
1140 if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1141 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1142 rc = CIFSPOSIXDelFile(xid, tcon, full_path,
1143 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
1144 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1145 cFYI(1, "posix del rc %d", rc);
1146 if ((rc == 0) || (rc == -ENOENT))
1147 goto psx_del_no_retry;
1151 if (!server->ops->unlink) {
1153 goto psx_del_no_retry;
1156 rc = server->ops->unlink(xid, tcon, full_path, cifs_sb);
1161 cifs_drop_nlink(inode);
1162 } else if (rc == -ENOENT) {
1164 } else if (rc == -ETXTBSY) {
1165 if (server->ops->rename_pending_delete) {
1166 rc = server->ops->rename_pending_delete(full_path,
1169 cifs_drop_nlink(inode);
1173 } else if ((rc == -EACCES) && (dosattr == 0) && inode) {
1174 attrs = kzalloc(sizeof(*attrs), GFP_KERNEL);
1175 if (attrs == NULL) {
1180 /* try to reset dos attributes */
1181 cifs_inode = CIFS_I(inode);
1182 origattr = cifs_inode->cifsAttrs;
1184 origattr |= ATTR_NORMAL;
1185 dosattr = origattr & ~ATTR_READONLY;
1187 dosattr |= ATTR_NORMAL;
1188 dosattr |= ATTR_HIDDEN;
1190 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
1194 goto retry_std_delete;
1197 /* undo the setattr if we errored out and it's needed */
1198 if (rc != 0 && dosattr != 0)
1199 cifs_set_file_info(inode, attrs, xid, full_path, origattr);
1203 cifs_inode = CIFS_I(inode);
1204 cifs_inode->time = 0; /* will force revalidate to get info
1206 inode->i_ctime = current_fs_time(sb);
1208 dir->i_ctime = dir->i_mtime = current_fs_time(sb);
1209 cifs_inode = CIFS_I(dir);
1210 CIFS_I(dir)->time = 0; /* force revalidate of dir as well */
1215 cifs_put_tlink(tlink);
1220 cifs_mkdir_qinfo(struct inode *parent, struct dentry *dentry, umode_t mode,
1221 const char *full_path, struct cifs_sb_info *cifs_sb,
1222 struct cifs_tcon *tcon, const unsigned int xid)
1225 struct inode *inode = NULL;
1228 rc = cifs_get_inode_info_unix(&inode, full_path, parent->i_sb,
1231 rc = cifs_get_inode_info(&inode, full_path, NULL, parent->i_sb,
1238 * setting nlink not necessary except in cases where we failed to get it
1239 * from the server or was set bogus. Also, since this is a brand new
1240 * inode, no need to grab the i_lock before setting the i_nlink.
1242 if (inode->i_nlink < 2)
1243 set_nlink(inode, 2);
1244 mode &= ~current_umask();
1245 /* must turn on setgid bit if parent dir has it */
1246 if (parent->i_mode & S_ISGID)
1249 if (tcon->unix_ext) {
1250 struct cifs_unix_set_info_args args = {
1252 .ctime = NO_CHANGE_64,
1253 .atime = NO_CHANGE_64,
1254 .mtime = NO_CHANGE_64,
1257 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1258 args.uid = current_fsuid();
1259 if (parent->i_mode & S_ISGID)
1260 args.gid = parent->i_gid;
1262 args.gid = current_fsgid();
1264 args.uid = INVALID_UID; /* no change */
1265 args.gid = INVALID_GID; /* no change */
1267 CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args,
1269 cifs_sb->mnt_cifs_flags &
1270 CIFS_MOUNT_MAP_SPECIAL_CHR);
1272 struct TCP_Server_Info *server = tcon->ses->server;
1273 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
1274 (mode & S_IWUGO) == 0 && server->ops->mkdir_setinfo)
1275 server->ops->mkdir_setinfo(inode, full_path, cifs_sb,
1277 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
1278 inode->i_mode = (mode | S_IFDIR);
1280 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1281 inode->i_uid = current_fsuid();
1282 if (inode->i_mode & S_ISGID)
1283 inode->i_gid = parent->i_gid;
1285 inode->i_gid = current_fsgid();
1288 d_instantiate(dentry, inode);
1293 cifs_posix_mkdir(struct inode *inode, struct dentry *dentry, umode_t mode,
1294 const char *full_path, struct cifs_sb_info *cifs_sb,
1295 struct cifs_tcon *tcon, const unsigned int xid)
1299 FILE_UNIX_BASIC_INFO *info = NULL;
1300 struct inode *newinode = NULL;
1301 struct cifs_fattr fattr;
1303 info = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1306 goto posix_mkdir_out;
1309 mode &= ~current_umask();
1310 rc = CIFSPOSIXCreate(xid, tcon, SMB_O_DIRECTORY | SMB_O_CREAT, mode,
1311 NULL /* netfid */, info, &oplock, full_path,
1312 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
1313 CIFS_MOUNT_MAP_SPECIAL_CHR);
1314 if (rc == -EOPNOTSUPP)
1315 goto posix_mkdir_out;
1317 cFYI(1, "posix mkdir returned 0x%x", rc);
1319 goto posix_mkdir_out;
1322 if (info->Type == cpu_to_le32(-1))
1323 /* no return info, go query for it */
1324 goto posix_mkdir_get_info;
1326 * BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if
1327 * need to set uid/gid.
1330 cifs_unix_basic_to_fattr(&fattr, info, cifs_sb);
1331 cifs_fill_uniqueid(inode->i_sb, &fattr);
1332 newinode = cifs_iget(inode->i_sb, &fattr);
1334 goto posix_mkdir_get_info;
1336 d_instantiate(dentry, newinode);
1338 #ifdef CONFIG_CIFS_DEBUG2
1339 cFYI(1, "instantiated dentry %p %s to inode %p", dentry,
1340 dentry->d_name.name, newinode);
1342 if (newinode->i_nlink != 2)
1343 cFYI(1, "unexpected number of links %d", newinode->i_nlink);
1349 posix_mkdir_get_info:
1350 rc = cifs_mkdir_qinfo(inode, dentry, mode, full_path, cifs_sb, tcon,
1352 goto posix_mkdir_out;
1355 int cifs_mkdir(struct inode *inode, struct dentry *direntry, umode_t mode)
1359 struct cifs_sb_info *cifs_sb;
1360 struct tcon_link *tlink;
1361 struct cifs_tcon *tcon;
1362 struct TCP_Server_Info *server;
1365 cFYI(1, "In cifs_mkdir, mode = 0x%hx inode = 0x%p", mode, inode);
1367 cifs_sb = CIFS_SB(inode->i_sb);
1368 tlink = cifs_sb_tlink(cifs_sb);
1370 return PTR_ERR(tlink);
1371 tcon = tlink_tcon(tlink);
1375 full_path = build_path_from_dentry(direntry);
1376 if (full_path == NULL) {
1381 if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1382 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1383 rc = cifs_posix_mkdir(inode, direntry, mode, full_path, cifs_sb,
1385 if (rc != -EOPNOTSUPP)
1389 server = tcon->ses->server;
1391 if (!server->ops->mkdir) {
1396 /* BB add setting the equivalent of mode via CreateX w/ACLs */
1397 rc = server->ops->mkdir(xid, tcon, full_path, cifs_sb);
1399 cFYI(1, "cifs_mkdir returned 0x%x", rc);
1404 rc = cifs_mkdir_qinfo(inode, direntry, mode, full_path, cifs_sb, tcon,
1408 * Force revalidate to get parent dir info when needed since cached
1409 * attributes are invalid now.
1411 CIFS_I(inode)->time = 0;
1414 cifs_put_tlink(tlink);
1418 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1422 struct cifs_sb_info *cifs_sb;
1423 struct tcon_link *tlink;
1424 struct cifs_tcon *tcon;
1425 struct TCP_Server_Info *server;
1426 char *full_path = NULL;
1427 struct cifsInodeInfo *cifsInode;
1429 cFYI(1, "cifs_rmdir, inode = 0x%p", inode);
1433 full_path = build_path_from_dentry(direntry);
1434 if (full_path == NULL) {
1439 cifs_sb = CIFS_SB(inode->i_sb);
1440 tlink = cifs_sb_tlink(cifs_sb);
1441 if (IS_ERR(tlink)) {
1442 rc = PTR_ERR(tlink);
1445 tcon = tlink_tcon(tlink);
1446 server = tcon->ses->server;
1448 if (!server->ops->rmdir) {
1450 cifs_put_tlink(tlink);
1454 rc = server->ops->rmdir(xid, tcon, full_path, cifs_sb);
1455 cifs_put_tlink(tlink);
1458 spin_lock(&direntry->d_inode->i_lock);
1459 i_size_write(direntry->d_inode, 0);
1460 clear_nlink(direntry->d_inode);
1461 spin_unlock(&direntry->d_inode->i_lock);
1464 cifsInode = CIFS_I(direntry->d_inode);
1465 /* force revalidate to go get info when needed */
1466 cifsInode->time = 0;
1468 cifsInode = CIFS_I(inode);
1470 * Force revalidate to get parent dir info when needed since cached
1471 * attributes are invalid now.
1473 cifsInode->time = 0;
1475 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1476 current_fs_time(inode->i_sb);
1485 cifs_do_rename(const unsigned int xid, struct dentry *from_dentry,
1486 const char *from_path, struct dentry *to_dentry,
1487 const char *to_path)
1489 struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb);
1490 struct tcon_link *tlink;
1491 struct cifs_tcon *tcon;
1492 struct TCP_Server_Info *server;
1496 tlink = cifs_sb_tlink(cifs_sb);
1498 return PTR_ERR(tlink);
1499 tcon = tlink_tcon(tlink);
1500 server = tcon->ses->server;
1502 if (!server->ops->rename)
1505 /* try path-based rename first */
1506 rc = server->ops->rename(xid, tcon, from_path, to_path, cifs_sb);
1509 * Don't bother with rename by filehandle unless file is busy and
1510 * source. Note that cross directory moves do not work with
1511 * rename by filehandle to various Windows servers.
1513 if (rc == 0 || rc != -ETXTBSY)
1514 goto do_rename_exit;
1516 /* open-file renames don't work across directories */
1517 if (to_dentry->d_parent != from_dentry->d_parent)
1518 goto do_rename_exit;
1520 /* open the file to be renamed -- we need DELETE perms */
1521 rc = CIFSSMBOpen(xid, tcon, from_path, FILE_OPEN, DELETE,
1522 CREATE_NOT_DIR, &srcfid, &oplock, NULL,
1523 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
1524 CIFS_MOUNT_MAP_SPECIAL_CHR);
1526 rc = CIFSSMBRenameOpenFile(xid, tcon, srcfid,
1527 (const char *) to_dentry->d_name.name,
1528 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
1529 CIFS_MOUNT_MAP_SPECIAL_CHR);
1530 CIFSSMBClose(xid, tcon, srcfid);
1533 cifs_put_tlink(tlink);
1538 cifs_rename(struct inode *source_dir, struct dentry *source_dentry,
1539 struct inode *target_dir, struct dentry *target_dentry)
1541 char *from_name = NULL;
1542 char *to_name = NULL;
1543 struct cifs_sb_info *cifs_sb;
1544 struct tcon_link *tlink;
1545 struct cifs_tcon *tcon;
1546 FILE_UNIX_BASIC_INFO *info_buf_source = NULL;
1547 FILE_UNIX_BASIC_INFO *info_buf_target;
1551 cifs_sb = CIFS_SB(source_dir->i_sb);
1552 tlink = cifs_sb_tlink(cifs_sb);
1554 return PTR_ERR(tlink);
1555 tcon = tlink_tcon(tlink);
1560 * we already have the rename sem so we do not need to
1561 * grab it again here to protect the path integrity
1563 from_name = build_path_from_dentry(source_dentry);
1564 if (from_name == NULL) {
1566 goto cifs_rename_exit;
1569 to_name = build_path_from_dentry(target_dentry);
1570 if (to_name == NULL) {
1572 goto cifs_rename_exit;
1575 rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry,
1578 if (rc == -EEXIST && tcon->unix_ext) {
1580 * Are src and dst hardlinks of same inode? We can only tell
1581 * with unix extensions enabled.
1584 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO),
1586 if (info_buf_source == NULL) {
1588 goto cifs_rename_exit;
1591 info_buf_target = info_buf_source + 1;
1592 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, from_name,
1595 cifs_sb->mnt_cifs_flags &
1596 CIFS_MOUNT_MAP_SPECIAL_CHR);
1600 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, to_name,
1603 cifs_sb->mnt_cifs_flags &
1604 CIFS_MOUNT_MAP_SPECIAL_CHR);
1606 if (tmprc == 0 && (info_buf_source->UniqueId ==
1607 info_buf_target->UniqueId)) {
1608 /* same file, POSIX says that this is a noop */
1610 goto cifs_rename_exit;
1614 * else ... BB we could add the same check for Windows by
1615 * checking the UniqueId via FILE_INTERNAL_INFO
1619 /* Try unlinking the target dentry if it's not negative */
1620 if (target_dentry->d_inode && (rc == -EACCES || rc == -EEXIST)) {
1621 tmprc = cifs_unlink(target_dir, target_dentry);
1623 goto cifs_rename_exit;
1624 rc = cifs_do_rename(xid, source_dentry, from_name,
1625 target_dentry, to_name);
1629 kfree(info_buf_source);
1633 cifs_put_tlink(tlink);
1638 cifs_inode_needs_reval(struct inode *inode)
1640 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
1641 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1643 if (cifs_i->clientCanCacheRead)
1646 if (!lookupCacheEnabled)
1649 if (cifs_i->time == 0)
1652 if (!time_in_range(jiffies, cifs_i->time,
1653 cifs_i->time + cifs_sb->actimeo))
1656 /* hardlinked files w/ noserverino get "special" treatment */
1657 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) &&
1658 S_ISREG(inode->i_mode) && inode->i_nlink != 1)
1665 * Zap the cache. Called when invalid_mapping flag is set.
1668 cifs_invalidate_mapping(struct inode *inode)
1671 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
1673 cifs_i->invalid_mapping = false;
1675 if (inode->i_mapping && inode->i_mapping->nrpages != 0) {
1676 rc = invalidate_inode_pages2(inode->i_mapping);
1678 cERROR(1, "%s: could not invalidate inode %p", __func__,
1680 cifs_i->invalid_mapping = true;
1684 cifs_fscache_reset_inode_cookie(inode);
1688 int cifs_revalidate_file_attr(struct file *filp)
1691 struct inode *inode = filp->f_path.dentry->d_inode;
1692 struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data;
1694 if (!cifs_inode_needs_reval(inode))
1697 if (tlink_tcon(cfile->tlink)->unix_ext)
1698 rc = cifs_get_file_info_unix(filp);
1700 rc = cifs_get_file_info(filp);
1705 int cifs_revalidate_dentry_attr(struct dentry *dentry)
1709 struct inode *inode = dentry->d_inode;
1710 struct super_block *sb = dentry->d_sb;
1711 char *full_path = NULL;
1716 if (!cifs_inode_needs_reval(inode))
1721 /* can not safely grab the rename sem here if rename calls revalidate
1722 since that would deadlock */
1723 full_path = build_path_from_dentry(dentry);
1724 if (full_path == NULL) {
1729 cFYI(1, "Update attributes: %s inode 0x%p count %d dentry: 0x%p d_time "
1730 "%ld jiffies %ld", full_path, inode, inode->i_count.counter,
1731 dentry, dentry->d_time, jiffies);
1733 if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext)
1734 rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid);
1736 rc = cifs_get_inode_info(&inode, full_path, NULL, sb,
1745 int cifs_revalidate_file(struct file *filp)
1748 struct inode *inode = filp->f_path.dentry->d_inode;
1750 rc = cifs_revalidate_file_attr(filp);
1754 if (CIFS_I(inode)->invalid_mapping)
1755 rc = cifs_invalidate_mapping(inode);
1759 /* revalidate a dentry's inode attributes */
1760 int cifs_revalidate_dentry(struct dentry *dentry)
1763 struct inode *inode = dentry->d_inode;
1765 rc = cifs_revalidate_dentry_attr(dentry);
1769 if (CIFS_I(inode)->invalid_mapping)
1770 rc = cifs_invalidate_mapping(inode);
1774 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1777 struct cifs_sb_info *cifs_sb = CIFS_SB(dentry->d_sb);
1778 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
1779 struct inode *inode = dentry->d_inode;
1783 * We need to be sure that all dirty pages are written and the server
1784 * has actual ctime, mtime and file length.
1786 if (!CIFS_I(inode)->clientCanCacheRead && inode->i_mapping &&
1787 inode->i_mapping->nrpages != 0) {
1788 rc = filemap_fdatawait(inode->i_mapping);
1790 mapping_set_error(inode->i_mapping, rc);
1795 rc = cifs_revalidate_dentry_attr(dentry);
1799 generic_fillattr(inode, stat);
1800 stat->blksize = CIFS_MAX_MSGSIZE;
1801 stat->ino = CIFS_I(inode)->uniqueid;
1804 * If on a multiuser mount without unix extensions or cifsacl being
1805 * enabled, and the admin hasn't overridden them, set the ownership
1806 * to the fsuid/fsgid of the current process.
1808 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) &&
1809 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
1811 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID))
1812 stat->uid = current_fsuid();
1813 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID))
1814 stat->gid = current_fsgid();
1819 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1821 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1822 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1826 page = grab_cache_page(mapping, index);
1830 zero_user_segment(page, offset, PAGE_CACHE_SIZE);
1832 page_cache_release(page);
1836 static void cifs_setsize(struct inode *inode, loff_t offset)
1840 spin_lock(&inode->i_lock);
1841 oldsize = inode->i_size;
1842 i_size_write(inode, offset);
1843 spin_unlock(&inode->i_lock);
1845 truncate_pagecache(inode, oldsize, offset);
1849 cifs_set_file_size(struct inode *inode, struct iattr *attrs,
1850 unsigned int xid, char *full_path)
1853 struct cifsFileInfo *open_file;
1854 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1855 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1856 struct tcon_link *tlink = NULL;
1857 struct cifs_tcon *tcon = NULL;
1858 struct TCP_Server_Info *server;
1859 struct cifs_io_parms io_parms;
1862 * To avoid spurious oplock breaks from server, in the case of
1863 * inodes that we already have open, avoid doing path based
1864 * setting of file size if we can do it by handle.
1865 * This keeps our caching token (oplock) and avoids timeouts
1866 * when the local oplock break takes longer to flush
1867 * writebehind data than the SMB timeout for the SetPathInfo
1868 * request would allow
1870 open_file = find_writable_file(cifsInode, true);
1872 tcon = tlink_tcon(open_file->tlink);
1873 server = tcon->ses->server;
1874 if (server->ops->set_file_size)
1875 rc = server->ops->set_file_size(xid, tcon, open_file,
1876 attrs->ia_size, false);
1879 cifsFileInfo_put(open_file);
1880 cFYI(1, "SetFSize for attrs rc = %d", rc);
1881 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1882 unsigned int bytes_written;
1884 io_parms.netfid = open_file->fid.netfid;
1885 io_parms.pid = open_file->pid;
1886 io_parms.tcon = tcon;
1887 io_parms.offset = 0;
1888 io_parms.length = attrs->ia_size;
1889 rc = CIFSSMBWrite(xid, &io_parms, &bytes_written,
1891 cFYI(1, "Wrt seteof rc %d", rc);
1900 tlink = cifs_sb_tlink(cifs_sb);
1902 return PTR_ERR(tlink);
1903 tcon = tlink_tcon(tlink);
1904 server = tcon->ses->server;
1908 * Set file size by pathname rather than by handle either because no
1909 * valid, writeable file handle for it was found or because there was
1910 * an error setting it by handle.
1912 if (server->ops->set_path_size)
1913 rc = server->ops->set_path_size(xid, tcon, full_path,
1914 attrs->ia_size, cifs_sb, false);
1917 cFYI(1, "SetEOF by path (setattrs) rc = %d", rc);
1918 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1922 rc = SMBLegacyOpen(xid, tcon, full_path, FILE_OPEN,
1923 GENERIC_WRITE, CREATE_NOT_DIR, &netfid,
1924 &oplock, NULL, cifs_sb->local_nls,
1925 cifs_sb->mnt_cifs_flags &
1926 CIFS_MOUNT_MAP_SPECIAL_CHR);
1928 unsigned int bytes_written;
1930 io_parms.netfid = netfid;
1931 io_parms.pid = current->tgid;
1932 io_parms.tcon = tcon;
1933 io_parms.offset = 0;
1934 io_parms.length = attrs->ia_size;
1935 rc = CIFSSMBWrite(xid, &io_parms, &bytes_written, NULL,
1937 cFYI(1, "wrt seteof rc %d", rc);
1938 CIFSSMBClose(xid, tcon, netfid);
1942 cifs_put_tlink(tlink);
1946 cifsInode->server_eof = attrs->ia_size;
1947 cifs_setsize(inode, attrs->ia_size);
1948 cifs_truncate_page(inode->i_mapping, inode->i_size);
1955 cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
1959 char *full_path = NULL;
1960 struct inode *inode = direntry->d_inode;
1961 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1962 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1963 struct tcon_link *tlink;
1964 struct cifs_tcon *pTcon;
1965 struct cifs_unix_set_info_args *args = NULL;
1966 struct cifsFileInfo *open_file;
1968 cFYI(1, "setattr_unix on file %s attrs->ia_valid=0x%x",
1969 direntry->d_name.name, attrs->ia_valid);
1973 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
1974 attrs->ia_valid |= ATTR_FORCE;
1976 rc = inode_change_ok(inode, attrs);
1980 full_path = build_path_from_dentry(direntry);
1981 if (full_path == NULL) {
1987 * Attempt to flush data before changing attributes. We need to do
1988 * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the
1989 * ownership or mode then we may also need to do this. Here, we take
1990 * the safe way out and just do the flush on all setattr requests. If
1991 * the flush returns error, store it to report later and continue.
1993 * BB: This should be smarter. Why bother flushing pages that
1994 * will be truncated anyway? Also, should we error out here if
1995 * the flush returns error?
1997 rc = filemap_write_and_wait(inode->i_mapping);
1998 mapping_set_error(inode->i_mapping, rc);
2001 if (attrs->ia_valid & ATTR_SIZE) {
2002 rc = cifs_set_file_size(inode, attrs, xid, full_path);
2007 /* skip mode change if it's just for clearing setuid/setgid */
2008 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
2009 attrs->ia_valid &= ~ATTR_MODE;
2011 args = kmalloc(sizeof(*args), GFP_KERNEL);
2017 /* set up the struct */
2018 if (attrs->ia_valid & ATTR_MODE)
2019 args->mode = attrs->ia_mode;
2021 args->mode = NO_CHANGE_64;
2023 if (attrs->ia_valid & ATTR_UID)
2024 args->uid = attrs->ia_uid;
2026 args->uid = INVALID_UID; /* no change */
2028 if (attrs->ia_valid & ATTR_GID)
2029 args->gid = attrs->ia_gid;
2031 args->gid = INVALID_GID; /* no change */
2033 if (attrs->ia_valid & ATTR_ATIME)
2034 args->atime = cifs_UnixTimeToNT(attrs->ia_atime);
2036 args->atime = NO_CHANGE_64;
2038 if (attrs->ia_valid & ATTR_MTIME)
2039 args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime);
2041 args->mtime = NO_CHANGE_64;
2043 if (attrs->ia_valid & ATTR_CTIME)
2044 args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime);
2046 args->ctime = NO_CHANGE_64;
2049 open_file = find_writable_file(cifsInode, true);
2051 u16 nfid = open_file->fid.netfid;
2052 u32 npid = open_file->pid;
2053 pTcon = tlink_tcon(open_file->tlink);
2054 rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid);
2055 cifsFileInfo_put(open_file);
2057 tlink = cifs_sb_tlink(cifs_sb);
2058 if (IS_ERR(tlink)) {
2059 rc = PTR_ERR(tlink);
2062 pTcon = tlink_tcon(tlink);
2063 rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args,
2065 cifs_sb->mnt_cifs_flags &
2066 CIFS_MOUNT_MAP_SPECIAL_CHR);
2067 cifs_put_tlink(tlink);
2073 if ((attrs->ia_valid & ATTR_SIZE) &&
2074 attrs->ia_size != i_size_read(inode))
2075 truncate_setsize(inode, attrs->ia_size);
2077 setattr_copy(inode, attrs);
2078 mark_inode_dirty(inode);
2080 /* force revalidate when any of these times are set since some
2081 of the fs types (eg ext3, fat) do not have fine enough
2082 time granularity to match protocol, and we do not have a
2083 a way (yet) to query the server fs's time granularity (and
2084 whether it rounds times down).
2086 if (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME))
2087 cifsInode->time = 0;
2096 cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
2099 kuid_t uid = INVALID_UID;
2100 kgid_t gid = INVALID_GID;
2101 struct inode *inode = direntry->d_inode;
2102 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2103 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2104 char *full_path = NULL;
2107 __u64 mode = NO_CHANGE_64;
2111 cFYI(1, "setattr on file %s attrs->iavalid 0x%x",
2112 direntry->d_name.name, attrs->ia_valid);
2114 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
2115 attrs->ia_valid |= ATTR_FORCE;
2117 rc = inode_change_ok(inode, attrs);
2123 full_path = build_path_from_dentry(direntry);
2124 if (full_path == NULL) {
2131 * Attempt to flush data before changing attributes. We need to do
2132 * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the
2133 * ownership or mode then we may also need to do this. Here, we take
2134 * the safe way out and just do the flush on all setattr requests. If
2135 * the flush returns error, store it to report later and continue.
2137 * BB: This should be smarter. Why bother flushing pages that
2138 * will be truncated anyway? Also, should we error out here if
2139 * the flush returns error?
2141 rc = filemap_write_and_wait(inode->i_mapping);
2142 mapping_set_error(inode->i_mapping, rc);
2145 if (attrs->ia_valid & ATTR_SIZE) {
2146 rc = cifs_set_file_size(inode, attrs, xid, full_path);
2148 goto cifs_setattr_exit;
2151 if (attrs->ia_valid & ATTR_UID)
2152 uid = attrs->ia_uid;
2154 if (attrs->ia_valid & ATTR_GID)
2155 gid = attrs->ia_gid;
2157 #ifdef CONFIG_CIFS_ACL
2158 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
2159 if (uid_valid(uid) || gid_valid(gid)) {
2160 rc = id_mode_to_cifs_acl(inode, full_path, NO_CHANGE_64,
2163 cFYI(1, "%s: Setting id failed with error: %d",
2165 goto cifs_setattr_exit;
2169 #endif /* CONFIG_CIFS_ACL */
2170 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID))
2171 attrs->ia_valid &= ~(ATTR_UID | ATTR_GID);
2173 /* skip mode change if it's just for clearing setuid/setgid */
2174 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
2175 attrs->ia_valid &= ~ATTR_MODE;
2177 if (attrs->ia_valid & ATTR_MODE) {
2178 mode = attrs->ia_mode;
2180 #ifdef CONFIG_CIFS_ACL
2181 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
2182 rc = id_mode_to_cifs_acl(inode, full_path, mode,
2183 INVALID_UID, INVALID_GID);
2185 cFYI(1, "%s: Setting ACL failed with error: %d",
2187 goto cifs_setattr_exit;
2190 #endif /* CONFIG_CIFS_ACL */
2191 if (((mode & S_IWUGO) == 0) &&
2192 (cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
2194 dosattr = cifsInode->cifsAttrs | ATTR_READONLY;
2196 /* fix up mode if we're not using dynperm */
2197 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
2198 attrs->ia_mode = inode->i_mode & ~S_IWUGO;
2199 } else if ((mode & S_IWUGO) &&
2200 (cifsInode->cifsAttrs & ATTR_READONLY)) {
2202 dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
2203 /* Attributes of 0 are ignored */
2205 dosattr |= ATTR_NORMAL;
2207 /* reset local inode permissions to normal */
2208 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2209 attrs->ia_mode &= ~(S_IALLUGO);
2210 if (S_ISDIR(inode->i_mode))
2212 cifs_sb->mnt_dir_mode;
2215 cifs_sb->mnt_file_mode;
2217 } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2218 /* ignore mode change - ATTR_READONLY hasn't changed */
2219 attrs->ia_valid &= ~ATTR_MODE;
2223 if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) ||
2224 ((attrs->ia_valid & ATTR_MODE) && dosattr)) {
2225 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
2226 /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */
2228 /* Even if error on time set, no sense failing the call if
2229 the server would set the time to a reasonable value anyway,
2230 and this check ensures that we are not being called from
2231 sys_utimes in which case we ought to fail the call back to
2232 the user when the server rejects the call */
2233 if ((rc) && (attrs->ia_valid &
2234 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
2238 /* do not need local check to inode_check_ok since the server does
2241 goto cifs_setattr_exit;
2243 if ((attrs->ia_valid & ATTR_SIZE) &&
2244 attrs->ia_size != i_size_read(inode))
2245 truncate_setsize(inode, attrs->ia_size);
2247 setattr_copy(inode, attrs);
2248 mark_inode_dirty(inode);
2257 cifs_setattr(struct dentry *direntry, struct iattr *attrs)
2259 struct inode *inode = direntry->d_inode;
2260 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2261 struct cifs_tcon *pTcon = cifs_sb_master_tcon(cifs_sb);
2263 if (pTcon->unix_ext)
2264 return cifs_setattr_unix(direntry, attrs);
2266 return cifs_setattr_nounix(direntry, attrs);
2268 /* BB: add cifs_setattr_legacy for really old servers */
2272 void cifs_delete_inode(struct inode *inode)
2274 cFYI(1, "In cifs_delete_inode, inode = 0x%p", inode);
2275 /* may have to add back in if and when safe distributed caching of
2276 directories added e.g. via FindNotify */