4 * Copyright (C) International Business Machines Corp., 2002,2010
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 <linux/freezer.h>
26 #include <linux/sched/signal.h>
27 #include <linux/wait_bit.h>
29 #include <asm/div64.h>
33 #include "cifsproto.h"
34 #include "cifs_debug.h"
35 #include "cifs_fs_sb.h"
36 #include "cifs_unicode.h"
40 static void cifs_set_ops(struct inode *inode)
42 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
44 switch (inode->i_mode & S_IFMT) {
46 inode->i_op = &cifs_file_inode_ops;
47 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
48 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
49 inode->i_fop = &cifs_file_direct_nobrl_ops;
51 inode->i_fop = &cifs_file_direct_ops;
52 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) {
53 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
54 inode->i_fop = &cifs_file_strict_nobrl_ops;
56 inode->i_fop = &cifs_file_strict_ops;
57 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
58 inode->i_fop = &cifs_file_nobrl_ops;
59 else { /* not direct, send byte range locks */
60 inode->i_fop = &cifs_file_ops;
63 /* check if server can support readpages */
64 if (cifs_sb_master_tcon(cifs_sb)->ses->server->maxBuf <
65 PAGE_SIZE + MAX_CIFS_HDR_SIZE)
66 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
68 inode->i_data.a_ops = &cifs_addr_ops;
71 #ifdef CONFIG_CIFS_DFS_UPCALL
72 if (IS_AUTOMOUNT(inode)) {
73 inode->i_op = &cifs_dfs_referral_inode_operations;
75 #else /* NO DFS support, treat as a directory */
78 inode->i_op = &cifs_dir_inode_ops;
79 inode->i_fop = &cifs_dir_ops;
83 inode->i_op = &cifs_symlink_inode_ops;
86 init_special_inode(inode, inode->i_mode, inode->i_rdev);
91 /* check inode attributes against fattr. If they don't match, tag the
92 * inode for cache invalidation
95 cifs_revalidate_cache(struct inode *inode, struct cifs_fattr *fattr)
97 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
99 cifs_dbg(FYI, "%s: revalidating inode %llu\n",
100 __func__, cifs_i->uniqueid);
102 if (inode->i_state & I_NEW) {
103 cifs_dbg(FYI, "%s: inode %llu is new\n",
104 __func__, cifs_i->uniqueid);
108 /* don't bother with revalidation if we have an oplock */
109 if (CIFS_CACHE_READ(cifs_i)) {
110 cifs_dbg(FYI, "%s: inode %llu is oplocked\n",
111 __func__, cifs_i->uniqueid);
115 /* revalidate if mtime or size have changed */
116 if (timespec64_equal(&inode->i_mtime, &fattr->cf_mtime) &&
117 cifs_i->server_eof == fattr->cf_eof) {
118 cifs_dbg(FYI, "%s: inode %llu is unchanged\n",
119 __func__, cifs_i->uniqueid);
123 cifs_dbg(FYI, "%s: invalidating inode %llu mapping\n",
124 __func__, cifs_i->uniqueid);
125 set_bit(CIFS_INO_INVALID_MAPPING, &cifs_i->flags);
129 * copy nlink to the inode, unless it wasn't provided. Provide
130 * sane values if we don't have an existing one and none was provided
133 cifs_nlink_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr)
136 * if we're in a situation where we can't trust what we
137 * got from the server (readdir, some non-unix cases)
138 * fake reasonable values
140 if (fattr->cf_flags & CIFS_FATTR_UNKNOWN_NLINK) {
141 /* only provide fake values on a new inode */
142 if (inode->i_state & I_NEW) {
143 if (fattr->cf_cifsattrs & ATTR_DIRECTORY)
151 /* we trust the server, so update it */
152 set_nlink(inode, fattr->cf_nlink);
155 /* populate an inode with info from a cifs_fattr struct */
157 cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr)
159 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
160 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
162 cifs_revalidate_cache(inode, fattr);
164 spin_lock(&inode->i_lock);
165 /* we do not want atime to be less than mtime, it broke some apps */
166 if (timespec64_compare(&fattr->cf_atime, &fattr->cf_mtime))
167 inode->i_atime = fattr->cf_mtime;
169 inode->i_atime = fattr->cf_atime;
170 inode->i_mtime = fattr->cf_mtime;
171 inode->i_ctime = fattr->cf_ctime;
172 inode->i_rdev = fattr->cf_rdev;
173 cifs_nlink_fattr_to_inode(inode, fattr);
174 inode->i_uid = fattr->cf_uid;
175 inode->i_gid = fattr->cf_gid;
177 /* if dynperm is set, don't clobber existing mode */
178 if (inode->i_state & I_NEW ||
179 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM))
180 inode->i_mode = fattr->cf_mode;
182 cifs_i->cifsAttrs = fattr->cf_cifsattrs;
184 if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL)
187 cifs_i->time = jiffies;
189 if (fattr->cf_flags & CIFS_FATTR_DELETE_PENDING)
190 set_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags);
192 clear_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags);
194 cifs_i->server_eof = fattr->cf_eof;
196 * Can't safely change the file size here if the client is writing to
197 * it due to potential races.
199 if (is_size_safe_to_change(cifs_i, fattr->cf_eof)) {
200 i_size_write(inode, fattr->cf_eof);
203 * i_blocks is not related to (i_size / i_blksize),
204 * but instead 512 byte (2**9) size is required for
205 * calculating num blocks.
207 inode->i_blocks = (512 - 1 + fattr->cf_bytes) >> 9;
209 spin_unlock(&inode->i_lock);
211 if (fattr->cf_flags & CIFS_FATTR_DFS_REFERRAL)
212 inode->i_flags |= S_AUTOMOUNT;
213 if (inode->i_state & I_NEW)
218 cifs_fill_uniqueid(struct super_block *sb, struct cifs_fattr *fattr)
220 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
222 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
225 fattr->cf_uniqueid = iunique(sb, ROOT_I);
228 /* Fill a cifs_fattr struct with info from FILE_UNIX_BASIC_INFO. */
230 cifs_unix_basic_to_fattr(struct cifs_fattr *fattr, FILE_UNIX_BASIC_INFO *info,
231 struct cifs_sb_info *cifs_sb)
233 memset(fattr, 0, sizeof(*fattr));
234 fattr->cf_uniqueid = le64_to_cpu(info->UniqueId);
235 fattr->cf_bytes = le64_to_cpu(info->NumOfBytes);
236 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
238 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
239 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastModificationTime);
240 fattr->cf_ctime = cifs_NTtimeToUnix(info->LastStatusChange);
241 /* old POSIX extensions don't get create time */
243 fattr->cf_mode = le64_to_cpu(info->Permissions);
246 * Since we set the inode type below we need to mask off
247 * to avoid strange results if bits set above.
249 fattr->cf_mode &= ~S_IFMT;
250 switch (le32_to_cpu(info->Type)) {
252 fattr->cf_mode |= S_IFREG;
253 fattr->cf_dtype = DT_REG;
256 fattr->cf_mode |= S_IFLNK;
257 fattr->cf_dtype = DT_LNK;
260 fattr->cf_mode |= S_IFDIR;
261 fattr->cf_dtype = DT_DIR;
264 fattr->cf_mode |= S_IFCHR;
265 fattr->cf_dtype = DT_CHR;
266 fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor),
267 le64_to_cpu(info->DevMinor) & MINORMASK);
270 fattr->cf_mode |= S_IFBLK;
271 fattr->cf_dtype = DT_BLK;
272 fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor),
273 le64_to_cpu(info->DevMinor) & MINORMASK);
276 fattr->cf_mode |= S_IFIFO;
277 fattr->cf_dtype = DT_FIFO;
280 fattr->cf_mode |= S_IFSOCK;
281 fattr->cf_dtype = DT_SOCK;
284 /* safest to call it a file if we do not know */
285 fattr->cf_mode |= S_IFREG;
286 fattr->cf_dtype = DT_REG;
287 cifs_dbg(FYI, "unknown type %d\n", le32_to_cpu(info->Type));
291 fattr->cf_uid = cifs_sb->mnt_uid;
292 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)) {
293 u64 id = le64_to_cpu(info->Uid);
294 if (id < ((uid_t)-1)) {
295 kuid_t uid = make_kuid(&init_user_ns, id);
301 fattr->cf_gid = cifs_sb->mnt_gid;
302 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)) {
303 u64 id = le64_to_cpu(info->Gid);
304 if (id < ((gid_t)-1)) {
305 kgid_t gid = make_kgid(&init_user_ns, id);
311 fattr->cf_nlink = le64_to_cpu(info->Nlinks);
315 * Fill a cifs_fattr struct with fake inode info.
317 * Needed to setup cifs_fattr data for the directory which is the
318 * junction to the new submount (ie to setup the fake directory
319 * which represents a DFS referral).
322 cifs_create_dfs_fattr(struct cifs_fattr *fattr, struct super_block *sb)
324 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
326 cifs_dbg(FYI, "creating fake fattr for DFS referral\n");
328 memset(fattr, 0, sizeof(*fattr));
329 fattr->cf_mode = S_IFDIR | S_IXUGO | S_IRWXU;
330 fattr->cf_uid = cifs_sb->mnt_uid;
331 fattr->cf_gid = cifs_sb->mnt_gid;
332 ktime_get_real_ts64(&fattr->cf_mtime);
333 fattr->cf_mtime = timespec64_trunc(fattr->cf_mtime, sb->s_time_gran);
334 fattr->cf_atime = fattr->cf_ctime = fattr->cf_mtime;
336 fattr->cf_flags = CIFS_FATTR_DFS_REFERRAL;
340 cifs_get_file_info_unix(struct file *filp)
344 FILE_UNIX_BASIC_INFO find_data;
345 struct cifs_fattr fattr;
346 struct inode *inode = file_inode(filp);
347 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
348 struct cifsFileInfo *cfile = filp->private_data;
349 struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
352 rc = CIFSSMBUnixQFileInfo(xid, tcon, cfile->fid.netfid, &find_data);
354 cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb);
355 } else if (rc == -EREMOTE) {
356 cifs_create_dfs_fattr(&fattr, inode->i_sb);
360 cifs_fattr_to_inode(inode, &fattr);
365 int cifs_get_inode_info_unix(struct inode **pinode,
366 const unsigned char *full_path,
367 struct super_block *sb, unsigned int xid)
370 FILE_UNIX_BASIC_INFO find_data;
371 struct cifs_fattr fattr;
372 struct cifs_tcon *tcon;
373 struct tcon_link *tlink;
374 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
376 cifs_dbg(FYI, "Getting info on %s\n", full_path);
378 tlink = cifs_sb_tlink(cifs_sb);
380 return PTR_ERR(tlink);
381 tcon = tlink_tcon(tlink);
383 /* could have done a find first instead but this returns more info */
384 rc = CIFSSMBUnixQPathInfo(xid, tcon, full_path, &find_data,
385 cifs_sb->local_nls, cifs_remap(cifs_sb));
386 cifs_put_tlink(tlink);
389 cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb);
390 } else if (rc == -EREMOTE) {
391 cifs_create_dfs_fattr(&fattr, sb);
397 /* check for Minshall+French symlinks */
398 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
399 int tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr,
402 cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc);
405 if (*pinode == NULL) {
407 cifs_fill_uniqueid(sb, &fattr);
408 *pinode = cifs_iget(sb, &fattr);
412 /* we already have inode, update it */
414 /* if uniqueid is different, return error */
415 if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM &&
416 CIFS_I(*pinode)->uniqueid != fattr.cf_uniqueid)) {
421 /* if filetype is different, return error */
422 if (unlikely(((*pinode)->i_mode & S_IFMT) !=
423 (fattr.cf_mode & S_IFMT))) {
428 cifs_fattr_to_inode(*pinode, &fattr);
436 cifs_sfu_type(struct cifs_fattr *fattr, const char *path,
437 struct cifs_sb_info *cifs_sb, unsigned int xid)
441 struct tcon_link *tlink;
442 struct cifs_tcon *tcon;
444 struct cifs_open_parms oparms;
445 struct cifs_io_parms io_parms;
447 unsigned int bytes_read;
449 int buf_type = CIFS_NO_BUFFER;
453 fattr->cf_mode &= ~S_IFMT;
455 if (fattr->cf_eof == 0) {
456 fattr->cf_mode |= S_IFIFO;
457 fattr->cf_dtype = DT_FIFO;
459 } else if (fattr->cf_eof < 8) {
460 fattr->cf_mode |= S_IFREG;
461 fattr->cf_dtype = DT_REG;
462 return -EINVAL; /* EOPNOTSUPP? */
465 tlink = cifs_sb_tlink(cifs_sb);
467 return PTR_ERR(tlink);
468 tcon = tlink_tcon(tlink);
471 oparms.cifs_sb = cifs_sb;
472 oparms.desired_access = GENERIC_READ;
473 oparms.create_options = CREATE_NOT_DIR;
474 if (backup_cred(cifs_sb))
475 oparms.create_options |= CREATE_OPEN_BACKUP_INTENT;
476 oparms.disposition = FILE_OPEN;
479 oparms.reconnect = false;
481 if (tcon->ses->server->oplocks)
485 rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, NULL);
487 cifs_dbg(FYI, "check sfu type of %s, open rc = %d\n", path, rc);
488 cifs_put_tlink(tlink);
493 io_parms.netfid = fid.netfid;
494 io_parms.pid = current->tgid;
495 io_parms.tcon = tcon;
497 io_parms.length = 24;
499 rc = tcon->ses->server->ops->sync_read(xid, &fid, &io_parms,
500 &bytes_read, &pbuf, &buf_type);
501 if ((rc == 0) && (bytes_read >= 8)) {
502 if (memcmp("IntxBLK", pbuf, 8) == 0) {
503 cifs_dbg(FYI, "Block device\n");
504 fattr->cf_mode |= S_IFBLK;
505 fattr->cf_dtype = DT_BLK;
506 if (bytes_read == 24) {
507 /* we have enough to decode dev num */
508 __u64 mjr; /* major */
509 __u64 mnr; /* minor */
510 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
511 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
512 fattr->cf_rdev = MKDEV(mjr, mnr);
514 } else if (memcmp("IntxCHR", pbuf, 8) == 0) {
515 cifs_dbg(FYI, "Char device\n");
516 fattr->cf_mode |= S_IFCHR;
517 fattr->cf_dtype = DT_CHR;
518 if (bytes_read == 24) {
519 /* we have enough to decode dev num */
520 __u64 mjr; /* major */
521 __u64 mnr; /* minor */
522 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
523 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
524 fattr->cf_rdev = MKDEV(mjr, mnr);
526 } else if (memcmp("IntxLNK", pbuf, 7) == 0) {
527 cifs_dbg(FYI, "Symlink\n");
528 fattr->cf_mode |= S_IFLNK;
529 fattr->cf_dtype = DT_LNK;
531 fattr->cf_mode |= S_IFREG; /* file? */
532 fattr->cf_dtype = DT_REG;
536 fattr->cf_mode |= S_IFREG; /* then it is a file */
537 fattr->cf_dtype = DT_REG;
538 rc = -EOPNOTSUPP; /* or some unknown SFU type */
541 tcon->ses->server->ops->close(xid, tcon, &fid);
542 cifs_put_tlink(tlink);
546 #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
549 * Fetch mode bits as provided by SFU.
551 * FIXME: Doesn't this clobber the type bit we got from cifs_sfu_type ?
553 static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path,
554 struct cifs_sb_info *cifs_sb, unsigned int xid)
556 #ifdef CONFIG_CIFS_XATTR
560 struct tcon_link *tlink;
561 struct cifs_tcon *tcon;
563 tlink = cifs_sb_tlink(cifs_sb);
565 return PTR_ERR(tlink);
566 tcon = tlink_tcon(tlink);
568 if (tcon->ses->server->ops->query_all_EAs == NULL) {
569 cifs_put_tlink(tlink);
573 rc = tcon->ses->server->ops->query_all_EAs(xid, tcon, path,
574 "SETFILEBITS", ea_value, 4 /* size of buf */,
576 cifs_put_tlink(tlink);
580 mode = le32_to_cpu(*((__le32 *)ea_value));
581 fattr->cf_mode &= ~SFBITS_MASK;
582 cifs_dbg(FYI, "special bits 0%o org mode 0%o\n",
583 mode, fattr->cf_mode);
584 fattr->cf_mode = (mode & SFBITS_MASK) | fattr->cf_mode;
585 cifs_dbg(FYI, "special mode bits 0%o\n", mode);
594 /* Fill a cifs_fattr struct with info from FILE_ALL_INFO */
596 cifs_all_info_to_fattr(struct cifs_fattr *fattr, FILE_ALL_INFO *info,
597 struct super_block *sb, bool adjust_tz,
600 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
601 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
603 memset(fattr, 0, sizeof(*fattr));
604 fattr->cf_cifsattrs = le32_to_cpu(info->Attributes);
605 if (info->DeletePending)
606 fattr->cf_flags |= CIFS_FATTR_DELETE_PENDING;
608 if (info->LastAccessTime)
609 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
611 ktime_get_real_ts64(&fattr->cf_atime);
612 fattr->cf_atime = timespec64_trunc(fattr->cf_atime, sb->s_time_gran);
615 fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime);
616 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);
619 fattr->cf_ctime.tv_sec += tcon->ses->server->timeAdj;
620 fattr->cf_mtime.tv_sec += tcon->ses->server->timeAdj;
623 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
624 fattr->cf_bytes = le64_to_cpu(info->AllocationSize);
625 fattr->cf_createtime = le64_to_cpu(info->CreationTime);
627 fattr->cf_nlink = le32_to_cpu(info->NumberOfLinks);
630 fattr->cf_mode = S_IFLNK;
631 fattr->cf_dtype = DT_LNK;
632 } else if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
633 fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode;
634 fattr->cf_dtype = DT_DIR;
636 * Server can return wrong NumberOfLinks value for directories
637 * when Unix extensions are disabled - fake it.
640 fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK;
642 fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode;
643 fattr->cf_dtype = DT_REG;
645 /* clear write bits if ATTR_READONLY is set */
646 if (fattr->cf_cifsattrs & ATTR_READONLY)
647 fattr->cf_mode &= ~(S_IWUGO);
650 * Don't accept zero nlink from non-unix servers unless
651 * delete is pending. Instead mark it as unknown.
653 if ((fattr->cf_nlink < 1) && !tcon->unix_ext &&
654 !info->DeletePending) {
655 cifs_dbg(1, "bogus file nlink value %u\n",
657 fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK;
661 fattr->cf_uid = cifs_sb->mnt_uid;
662 fattr->cf_gid = cifs_sb->mnt_gid;
666 cifs_get_file_info(struct file *filp)
670 FILE_ALL_INFO find_data;
671 struct cifs_fattr fattr;
672 struct inode *inode = file_inode(filp);
673 struct cifsFileInfo *cfile = filp->private_data;
674 struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
675 struct TCP_Server_Info *server = tcon->ses->server;
677 if (!server->ops->query_file_info)
681 rc = server->ops->query_file_info(xid, tcon, &cfile->fid, &find_data);
684 cifs_all_info_to_fattr(&fattr, &find_data, inode->i_sb, false,
688 cifs_create_dfs_fattr(&fattr, inode->i_sb);
694 * FIXME: legacy server -- fall back to path-based call?
695 * for now, just skip revalidating and mark inode for
699 CIFS_I(inode)->time = 0;
705 * don't bother with SFU junk here -- just mark inode as needing
708 fattr.cf_uniqueid = CIFS_I(inode)->uniqueid;
709 fattr.cf_flags |= CIFS_FATTR_NEED_REVAL;
710 cifs_fattr_to_inode(inode, &fattr);
716 /* Simple function to return a 64 bit hash of string. Rarely called */
717 static __u64 simple_hashstr(const char *str)
719 const __u64 hash_mult = 1125899906842597ULL; /* a big enough prime */
723 hash = (hash + (__u64) *str++) * hash_mult;
729 cifs_get_inode_info(struct inode **inode, const char *full_path,
730 FILE_ALL_INFO *data, struct super_block *sb, int xid,
731 const struct cifs_fid *fid)
734 int rc = 0, tmprc = ENOSYS;
735 struct cifs_tcon *tcon;
736 struct TCP_Server_Info *server;
737 struct tcon_link *tlink;
738 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
740 bool adjust_tz = false;
741 struct cifs_fattr fattr;
742 struct cifs_search_info *srchinf = NULL;
743 bool symlink = false;
745 tlink = cifs_sb_tlink(cifs_sb);
747 return PTR_ERR(tlink);
748 tcon = tlink_tcon(tlink);
749 server = tcon->ses->server;
751 cifs_dbg(FYI, "Getting info on %s\n", full_path);
753 if ((data == NULL) && (*inode != NULL)) {
754 if (CIFS_CACHE_READ(CIFS_I(*inode)) &&
755 CIFS_I(*inode)->time != 0) {
756 cifs_dbg(FYI, "No need to revalidate cached inode sizes\n");
761 /* if inode info is not passed, get it from server */
763 if (!server->ops->query_path_info) {
767 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
772 data = (FILE_ALL_INFO *)buf;
773 rc = server->ops->query_path_info(xid, tcon, cifs_sb, full_path,
774 data, &adjust_tz, &symlink);
778 cifs_all_info_to_fattr(&fattr, data, sb, adjust_tz,
780 } else if (rc == -EREMOTE) {
781 cifs_create_dfs_fattr(&fattr, sb);
783 } else if ((rc == -EACCES) && backup_cred(cifs_sb) &&
784 (strcmp(server->vals->version_string, SMB1_VERSION_STRING)
787 * For SMB2 and later the backup intent flag is already
788 * sent if needed on open and there is no path based
789 * FindFirst operation to use to retry with
792 srchinf = kzalloc(sizeof(struct cifs_search_info),
794 if (srchinf == NULL) {
799 srchinf->endOfSearch = false;
801 srchinf->info_level = SMB_FIND_FILE_UNIX;
802 else if ((tcon->ses->capabilities &
803 tcon->ses->server->vals->cap_nt_find) == 0)
804 srchinf->info_level = SMB_FIND_FILE_INFO_STANDARD;
805 else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
806 srchinf->info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
807 else /* no srvino useful for fallback to some netapp */
808 srchinf->info_level = SMB_FIND_FILE_DIRECTORY_INFO;
810 srchflgs = CIFS_SEARCH_CLOSE_ALWAYS |
811 CIFS_SEARCH_CLOSE_AT_END |
812 CIFS_SEARCH_BACKUP_SEARCH;
814 rc = CIFSFindFirst(xid, tcon, full_path,
815 cifs_sb, NULL, srchflgs, srchinf, false);
817 data = (FILE_ALL_INFO *)srchinf->srch_entries_start;
819 cifs_dir_info_to_fattr(&fattr,
820 (FILE_DIRECTORY_INFO *)data, cifs_sb);
821 fattr.cf_uniqueid = le64_to_cpu(
822 ((SEARCH_ID_FULL_DIR_INFO *)data)->UniqueId);
824 cifs_buf_release(srchinf->ntwrk_buf_start);
833 * If an inode wasn't passed in, then get the inode number
835 * Is an i_ino of zero legal? Can we use that to check if the server
836 * supports returning inode numbers? Are there other sanity checks we
837 * can use to ensure that the server is really filling in that field?
839 if (*inode == NULL) {
840 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
841 if (server->ops->get_srv_inum)
842 tmprc = server->ops->get_srv_inum(xid,
843 tcon, cifs_sb, full_path,
844 &fattr.cf_uniqueid, data);
846 cifs_dbg(FYI, "GetSrvInodeNum rc %d\n",
848 fattr.cf_uniqueid = iunique(sb, ROOT_I);
849 cifs_autodisable_serverino(cifs_sb);
850 } else if ((fattr.cf_uniqueid == 0) &&
851 strlen(full_path) == 0) {
852 /* some servers ret bad root ino ie 0 */
853 cifs_dbg(FYI, "Invalid (0) inodenum\n");
855 CIFS_FATTR_FAKE_ROOT_INO;
857 simple_hashstr(tcon->treeName);
860 fattr.cf_uniqueid = iunique(sb, ROOT_I);
862 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
863 && server->ops->get_srv_inum) {
865 * Pass a NULL tcon to ensure we don't make a round
866 * trip to the server. This only works for SMB2+.
868 tmprc = server->ops->get_srv_inum(xid,
869 NULL, cifs_sb, full_path,
870 &fattr.cf_uniqueid, data);
872 fattr.cf_uniqueid = CIFS_I(*inode)->uniqueid;
873 else if ((fattr.cf_uniqueid == 0) &&
874 strlen(full_path) == 0) {
876 * Reuse existing root inode num since
877 * inum zero for root causes ls of . and .. to
880 cifs_dbg(FYI, "Srv ret 0 inode num for root\n");
881 fattr.cf_uniqueid = CIFS_I(*inode)->uniqueid;
884 fattr.cf_uniqueid = CIFS_I(*inode)->uniqueid;
887 /* query for SFU type info if supported and needed */
888 if (fattr.cf_cifsattrs & ATTR_SYSTEM &&
889 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
890 tmprc = cifs_sfu_type(&fattr, full_path, cifs_sb, xid);
892 cifs_dbg(FYI, "cifs_sfu_type failed: %d\n", tmprc);
895 /* fill in 0777 bits from ACL */
896 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
897 rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, full_path, fid);
899 cifs_dbg(FYI, "%s: Getting ACL failed with error: %d\n",
905 /* fill in remaining high mode bits e.g. SUID, VTX */
906 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
907 cifs_sfu_mode(&fattr, full_path, cifs_sb, xid);
909 /* check for Minshall+French symlinks */
910 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
911 tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr,
914 cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc);
918 *inode = cifs_iget(sb, &fattr);
922 /* we already have inode, update it */
924 /* if uniqueid is different, return error */
925 if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM &&
926 CIFS_I(*inode)->uniqueid != fattr.cf_uniqueid)) {
931 /* if filetype is different, return error */
932 if (unlikely(((*inode)->i_mode & S_IFMT) !=
933 (fattr.cf_mode & S_IFMT))) {
938 cifs_fattr_to_inode(*inode, &fattr);
942 if ((*inode) && ((*inode)->i_ino == 0))
943 cifs_dbg(FYI, "inode number of zero returned\n");
946 cifs_put_tlink(tlink);
950 static const struct inode_operations cifs_ipc_inode_ops = {
951 .lookup = cifs_lookup,
955 cifs_find_inode(struct inode *inode, void *opaque)
957 struct cifs_fattr *fattr = (struct cifs_fattr *) opaque;
959 /* don't match inode with different uniqueid */
960 if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid)
963 /* use createtime like an i_generation field */
964 if (CIFS_I(inode)->createtime != fattr->cf_createtime)
967 /* don't match inode of different type */
968 if ((inode->i_mode & S_IFMT) != (fattr->cf_mode & S_IFMT))
971 /* if it's not a directory or has no dentries, then flag it */
972 if (S_ISDIR(inode->i_mode) && !hlist_empty(&inode->i_dentry))
973 fattr->cf_flags |= CIFS_FATTR_INO_COLLISION;
979 cifs_init_inode(struct inode *inode, void *opaque)
981 struct cifs_fattr *fattr = (struct cifs_fattr *) opaque;
983 CIFS_I(inode)->uniqueid = fattr->cf_uniqueid;
984 CIFS_I(inode)->createtime = fattr->cf_createtime;
989 * walk dentry list for an inode and report whether it has aliases that
990 * are hashed. We use this to determine if a directory inode can actually
994 inode_has_hashed_dentries(struct inode *inode)
996 struct dentry *dentry;
998 spin_lock(&inode->i_lock);
999 hlist_for_each_entry(dentry, &inode->i_dentry, d_u.d_alias) {
1000 if (!d_unhashed(dentry) || IS_ROOT(dentry)) {
1001 spin_unlock(&inode->i_lock);
1005 spin_unlock(&inode->i_lock);
1009 /* Given fattrs, get a corresponding inode */
1011 cifs_iget(struct super_block *sb, struct cifs_fattr *fattr)
1014 struct inode *inode;
1017 cifs_dbg(FYI, "looking for uniqueid=%llu\n", fattr->cf_uniqueid);
1019 /* hash down to 32-bits on 32-bit arch */
1020 hash = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid);
1022 inode = iget5_locked(sb, hash, cifs_find_inode, cifs_init_inode, fattr);
1024 /* was there a potentially problematic inode collision? */
1025 if (fattr->cf_flags & CIFS_FATTR_INO_COLLISION) {
1026 fattr->cf_flags &= ~CIFS_FATTR_INO_COLLISION;
1028 if (inode_has_hashed_dentries(inode)) {
1029 cifs_autodisable_serverino(CIFS_SB(sb));
1031 fattr->cf_uniqueid = iunique(sb, ROOT_I);
1032 goto retry_iget5_locked;
1036 cifs_fattr_to_inode(inode, fattr);
1037 if (sb->s_flags & SB_NOATIME)
1038 inode->i_flags |= S_NOATIME | S_NOCMTIME;
1039 if (inode->i_state & I_NEW) {
1040 inode->i_ino = hash;
1041 #ifdef CONFIG_CIFS_FSCACHE
1042 /* initialize per-inode cache cookie pointer */
1043 CIFS_I(inode)->fscache = NULL;
1045 unlock_new_inode(inode);
1052 /* gets root inode */
1053 struct inode *cifs_root_iget(struct super_block *sb)
1056 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1057 struct inode *inode = NULL;
1059 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
1063 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH)
1064 && cifs_sb->prepath) {
1065 len = strlen(cifs_sb->prepath);
1066 path = kzalloc(len + 2 /* leading sep + null */, GFP_KERNEL);
1068 return ERR_PTR(-ENOMEM);
1070 memcpy(path+1, cifs_sb->prepath, len);
1072 path = kstrdup("", GFP_KERNEL);
1074 return ERR_PTR(-ENOMEM);
1078 if (tcon->unix_ext) {
1079 rc = cifs_get_inode_info_unix(&inode, path, sb, xid);
1080 /* some servers mistakenly claim POSIX support */
1081 if (rc != -EOPNOTSUPP)
1083 cifs_dbg(VFS, "server does not support POSIX extensions");
1084 tcon->unix_ext = false;
1087 convert_delimiter(path, CIFS_DIR_SEP(cifs_sb));
1088 rc = cifs_get_inode_info(&inode, path, NULL, sb, xid, NULL);
1092 inode = ERR_PTR(rc);
1096 #ifdef CONFIG_CIFS_FSCACHE
1097 /* populate tcon->resource_id */
1098 tcon->resource_id = CIFS_I(inode)->uniqueid;
1101 if (rc && tcon->pipe) {
1102 cifs_dbg(FYI, "ipc connection - fake read inode\n");
1103 spin_lock(&inode->i_lock);
1104 inode->i_mode |= S_IFDIR;
1105 set_nlink(inode, 2);
1106 inode->i_op = &cifs_ipc_inode_ops;
1107 inode->i_fop = &simple_dir_operations;
1108 inode->i_uid = cifs_sb->mnt_uid;
1109 inode->i_gid = cifs_sb->mnt_gid;
1110 spin_unlock(&inode->i_lock);
1113 inode = ERR_PTR(rc);
1123 cifs_set_file_info(struct inode *inode, struct iattr *attrs, unsigned int xid,
1124 char *full_path, __u32 dosattr)
1126 bool set_time = false;
1127 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1128 struct TCP_Server_Info *server;
1129 FILE_BASIC_INFO info_buf;
1134 server = cifs_sb_master_tcon(cifs_sb)->ses->server;
1135 if (!server->ops->set_file_info)
1140 if (attrs->ia_valid & ATTR_ATIME) {
1142 info_buf.LastAccessTime =
1143 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1145 info_buf.LastAccessTime = 0;
1147 if (attrs->ia_valid & ATTR_MTIME) {
1149 info_buf.LastWriteTime =
1150 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1152 info_buf.LastWriteTime = 0;
1155 * Samba throws this field away, but windows may actually use it.
1156 * Do not set ctime unless other time stamps are changed explicitly
1157 * (i.e. by utimes()) since we would then have a mix of client and
1160 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1161 cifs_dbg(FYI, "CIFS - CTIME changed\n");
1162 info_buf.ChangeTime =
1163 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1165 info_buf.ChangeTime = 0;
1167 info_buf.CreationTime = 0; /* don't change */
1168 info_buf.Attributes = cpu_to_le32(dosattr);
1170 return server->ops->set_file_info(inode, full_path, &info_buf, xid);
1174 * Open the given file (if it isn't already), set the DELETE_ON_CLOSE bit
1175 * and rename it to a random name that hopefully won't conflict with
1179 cifs_rename_pending_delete(const char *full_path, struct dentry *dentry,
1180 const unsigned int xid)
1184 struct cifs_fid fid;
1185 struct cifs_open_parms oparms;
1186 struct inode *inode = d_inode(dentry);
1187 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1188 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1189 struct tcon_link *tlink;
1190 struct cifs_tcon *tcon;
1191 __u32 dosattr, origattr;
1192 FILE_BASIC_INFO *info_buf = NULL;
1194 tlink = cifs_sb_tlink(cifs_sb);
1196 return PTR_ERR(tlink);
1197 tcon = tlink_tcon(tlink);
1200 * We cannot rename the file if the server doesn't support
1201 * CAP_INFOLEVEL_PASSTHRU
1203 if (!(tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)) {
1209 oparms.cifs_sb = cifs_sb;
1210 oparms.desired_access = DELETE | FILE_WRITE_ATTRIBUTES;
1211 oparms.create_options = CREATE_NOT_DIR;
1212 oparms.disposition = FILE_OPEN;
1213 oparms.path = full_path;
1215 oparms.reconnect = false;
1217 rc = CIFS_open(xid, &oparms, &oplock, NULL);
1221 origattr = cifsInode->cifsAttrs;
1223 origattr |= ATTR_NORMAL;
1225 dosattr = origattr & ~ATTR_READONLY;
1227 dosattr |= ATTR_NORMAL;
1228 dosattr |= ATTR_HIDDEN;
1230 /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */
1231 if (dosattr != origattr) {
1232 info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL);
1233 if (info_buf == NULL) {
1237 info_buf->Attributes = cpu_to_le32(dosattr);
1238 rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid,
1240 /* although we would like to mark the file hidden
1241 if that fails we will still try to rename it */
1243 cifsInode->cifsAttrs = dosattr;
1245 dosattr = origattr; /* since not able to change them */
1248 /* rename the file */
1249 rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, NULL,
1251 cifs_remap(cifs_sb));
1257 /* try to set DELETE_ON_CLOSE */
1258 if (!test_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags)) {
1259 rc = CIFSSMBSetFileDisposition(xid, tcon, true, fid.netfid,
1262 * some samba versions return -ENOENT when we try to set the
1263 * file disposition here. Likely a samba bug, but work around
1264 * it for now. This means that some cifsXXX files may hang
1265 * around after they shouldn't.
1267 * BB: remove this hack after more servers have the fix
1275 set_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags);
1279 CIFSSMBClose(xid, tcon, fid.netfid);
1282 cifs_put_tlink(tlink);
1286 * reset everything back to the original state. Don't bother
1287 * dealing with errors here since we can't do anything about
1291 CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, dentry->d_name.name,
1292 cifs_sb->local_nls, cifs_remap(cifs_sb));
1294 if (dosattr != origattr) {
1295 info_buf->Attributes = cpu_to_le32(origattr);
1296 if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid,
1298 cifsInode->cifsAttrs = origattr;
1304 /* copied from fs/nfs/dir.c with small changes */
1306 cifs_drop_nlink(struct inode *inode)
1308 spin_lock(&inode->i_lock);
1309 if (inode->i_nlink > 0)
1311 spin_unlock(&inode->i_lock);
1315 * If d_inode(dentry) is null (usually meaning the cached dentry
1316 * is a negative dentry) then we would attempt a standard SMB delete, but
1317 * if that fails we can not attempt the fall back mechanisms on EACCES
1318 * but will return the EACCES to the caller. Note that the VFS does not call
1319 * unlink on negative dentries currently.
1321 int cifs_unlink(struct inode *dir, struct dentry *dentry)
1325 char *full_path = NULL;
1326 struct inode *inode = d_inode(dentry);
1327 struct cifsInodeInfo *cifs_inode;
1328 struct super_block *sb = dir->i_sb;
1329 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1330 struct tcon_link *tlink;
1331 struct cifs_tcon *tcon;
1332 struct TCP_Server_Info *server;
1333 struct iattr *attrs = NULL;
1334 __u32 dosattr = 0, origattr = 0;
1336 cifs_dbg(FYI, "cifs_unlink, dir=0x%p, dentry=0x%p\n", dir, dentry);
1338 tlink = cifs_sb_tlink(cifs_sb);
1340 return PTR_ERR(tlink);
1341 tcon = tlink_tcon(tlink);
1342 server = tcon->ses->server;
1346 /* Unlink can be called from rename so we can not take the
1347 * sb->s_vfs_rename_mutex here */
1348 full_path = build_path_from_dentry(dentry);
1349 if (full_path == NULL) {
1354 if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1355 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1356 rc = CIFSPOSIXDelFile(xid, tcon, full_path,
1357 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
1358 cifs_remap(cifs_sb));
1359 cifs_dbg(FYI, "posix del rc %d\n", rc);
1360 if ((rc == 0) || (rc == -ENOENT))
1361 goto psx_del_no_retry;
1365 if (!server->ops->unlink) {
1367 goto psx_del_no_retry;
1370 rc = server->ops->unlink(xid, tcon, full_path, cifs_sb);
1375 cifs_drop_nlink(inode);
1376 } else if (rc == -ENOENT) {
1378 } else if (rc == -EBUSY) {
1379 if (server->ops->rename_pending_delete) {
1380 rc = server->ops->rename_pending_delete(full_path,
1383 cifs_drop_nlink(inode);
1385 } else if ((rc == -EACCES) && (dosattr == 0) && inode) {
1386 attrs = kzalloc(sizeof(*attrs), GFP_KERNEL);
1387 if (attrs == NULL) {
1392 /* try to reset dos attributes */
1393 cifs_inode = CIFS_I(inode);
1394 origattr = cifs_inode->cifsAttrs;
1396 origattr |= ATTR_NORMAL;
1397 dosattr = origattr & ~ATTR_READONLY;
1399 dosattr |= ATTR_NORMAL;
1400 dosattr |= ATTR_HIDDEN;
1402 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
1406 goto retry_std_delete;
1409 /* undo the setattr if we errored out and it's needed */
1410 if (rc != 0 && dosattr != 0)
1411 cifs_set_file_info(inode, attrs, xid, full_path, origattr);
1415 cifs_inode = CIFS_I(inode);
1416 cifs_inode->time = 0; /* will force revalidate to get info
1418 inode->i_ctime = current_time(inode);
1420 dir->i_ctime = dir->i_mtime = current_time(dir);
1421 cifs_inode = CIFS_I(dir);
1422 CIFS_I(dir)->time = 0; /* force revalidate of dir as well */
1427 cifs_put_tlink(tlink);
1432 cifs_mkdir_qinfo(struct inode *parent, struct dentry *dentry, umode_t mode,
1433 const char *full_path, struct cifs_sb_info *cifs_sb,
1434 struct cifs_tcon *tcon, const unsigned int xid)
1437 struct inode *inode = NULL;
1440 rc = cifs_get_inode_info_unix(&inode, full_path, parent->i_sb,
1443 rc = cifs_get_inode_info(&inode, full_path, NULL, parent->i_sb,
1450 * setting nlink not necessary except in cases where we failed to get it
1451 * from the server or was set bogus. Also, since this is a brand new
1452 * inode, no need to grab the i_lock before setting the i_nlink.
1454 if (inode->i_nlink < 2)
1455 set_nlink(inode, 2);
1456 mode &= ~current_umask();
1457 /* must turn on setgid bit if parent dir has it */
1458 if (parent->i_mode & S_ISGID)
1461 if (tcon->unix_ext) {
1462 struct cifs_unix_set_info_args args = {
1464 .ctime = NO_CHANGE_64,
1465 .atime = NO_CHANGE_64,
1466 .mtime = NO_CHANGE_64,
1469 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1470 args.uid = current_fsuid();
1471 if (parent->i_mode & S_ISGID)
1472 args.gid = parent->i_gid;
1474 args.gid = current_fsgid();
1476 args.uid = INVALID_UID; /* no change */
1477 args.gid = INVALID_GID; /* no change */
1479 CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args,
1481 cifs_remap(cifs_sb));
1483 struct TCP_Server_Info *server = tcon->ses->server;
1484 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
1485 (mode & S_IWUGO) == 0 && server->ops->mkdir_setinfo)
1486 server->ops->mkdir_setinfo(inode, full_path, cifs_sb,
1488 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
1489 inode->i_mode = (mode | S_IFDIR);
1491 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1492 inode->i_uid = current_fsuid();
1493 if (inode->i_mode & S_ISGID)
1494 inode->i_gid = parent->i_gid;
1496 inode->i_gid = current_fsgid();
1499 d_instantiate(dentry, inode);
1504 cifs_posix_mkdir(struct inode *inode, struct dentry *dentry, umode_t mode,
1505 const char *full_path, struct cifs_sb_info *cifs_sb,
1506 struct cifs_tcon *tcon, const unsigned int xid)
1510 FILE_UNIX_BASIC_INFO *info = NULL;
1511 struct inode *newinode = NULL;
1512 struct cifs_fattr fattr;
1514 info = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1517 goto posix_mkdir_out;
1520 mode &= ~current_umask();
1521 rc = CIFSPOSIXCreate(xid, tcon, SMB_O_DIRECTORY | SMB_O_CREAT, mode,
1522 NULL /* netfid */, info, &oplock, full_path,
1523 cifs_sb->local_nls, cifs_remap(cifs_sb));
1524 if (rc == -EOPNOTSUPP)
1525 goto posix_mkdir_out;
1527 cifs_dbg(FYI, "posix mkdir returned 0x%x\n", rc);
1529 goto posix_mkdir_out;
1532 if (info->Type == cpu_to_le32(-1))
1533 /* no return info, go query for it */
1534 goto posix_mkdir_get_info;
1536 * BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if
1537 * need to set uid/gid.
1540 cifs_unix_basic_to_fattr(&fattr, info, cifs_sb);
1541 cifs_fill_uniqueid(inode->i_sb, &fattr);
1542 newinode = cifs_iget(inode->i_sb, &fattr);
1544 goto posix_mkdir_get_info;
1546 d_instantiate(dentry, newinode);
1548 #ifdef CONFIG_CIFS_DEBUG2
1549 cifs_dbg(FYI, "instantiated dentry %p %pd to inode %p\n",
1550 dentry, dentry, newinode);
1552 if (newinode->i_nlink != 2)
1553 cifs_dbg(FYI, "unexpected number of links %d\n",
1560 posix_mkdir_get_info:
1561 rc = cifs_mkdir_qinfo(inode, dentry, mode, full_path, cifs_sb, tcon,
1563 goto posix_mkdir_out;
1566 int cifs_mkdir(struct inode *inode, struct dentry *direntry, umode_t mode)
1570 struct cifs_sb_info *cifs_sb;
1571 struct tcon_link *tlink;
1572 struct cifs_tcon *tcon;
1573 struct TCP_Server_Info *server;
1576 cifs_dbg(FYI, "In cifs_mkdir, mode = 0x%hx inode = 0x%p\n",
1579 cifs_sb = CIFS_SB(inode->i_sb);
1580 tlink = cifs_sb_tlink(cifs_sb);
1582 return PTR_ERR(tlink);
1583 tcon = tlink_tcon(tlink);
1587 full_path = build_path_from_dentry(direntry);
1588 if (full_path == NULL) {
1593 server = tcon->ses->server;
1595 if ((server->ops->posix_mkdir) && (tcon->posix_extensions)) {
1596 rc = server->ops->posix_mkdir(xid, inode, mode, tcon, full_path,
1598 d_drop(direntry); /* for time being always refresh inode info */
1602 if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1603 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1604 rc = cifs_posix_mkdir(inode, direntry, mode, full_path, cifs_sb,
1606 if (rc != -EOPNOTSUPP)
1610 if (!server->ops->mkdir) {
1615 /* BB add setting the equivalent of mode via CreateX w/ACLs */
1616 rc = server->ops->mkdir(xid, tcon, full_path, cifs_sb);
1618 cifs_dbg(FYI, "cifs_mkdir returned 0x%x\n", rc);
1623 rc = cifs_mkdir_qinfo(inode, direntry, mode, full_path, cifs_sb, tcon,
1627 * Force revalidate to get parent dir info when needed since cached
1628 * attributes are invalid now.
1630 CIFS_I(inode)->time = 0;
1633 cifs_put_tlink(tlink);
1637 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1641 struct cifs_sb_info *cifs_sb;
1642 struct tcon_link *tlink;
1643 struct cifs_tcon *tcon;
1644 struct TCP_Server_Info *server;
1645 char *full_path = NULL;
1646 struct cifsInodeInfo *cifsInode;
1648 cifs_dbg(FYI, "cifs_rmdir, inode = 0x%p\n", inode);
1652 full_path = build_path_from_dentry(direntry);
1653 if (full_path == NULL) {
1658 cifs_sb = CIFS_SB(inode->i_sb);
1659 tlink = cifs_sb_tlink(cifs_sb);
1660 if (IS_ERR(tlink)) {
1661 rc = PTR_ERR(tlink);
1664 tcon = tlink_tcon(tlink);
1665 server = tcon->ses->server;
1667 if (!server->ops->rmdir) {
1669 cifs_put_tlink(tlink);
1673 rc = server->ops->rmdir(xid, tcon, full_path, cifs_sb);
1674 cifs_put_tlink(tlink);
1677 spin_lock(&d_inode(direntry)->i_lock);
1678 i_size_write(d_inode(direntry), 0);
1679 clear_nlink(d_inode(direntry));
1680 spin_unlock(&d_inode(direntry)->i_lock);
1683 cifsInode = CIFS_I(d_inode(direntry));
1684 /* force revalidate to go get info when needed */
1685 cifsInode->time = 0;
1687 cifsInode = CIFS_I(inode);
1689 * Force revalidate to get parent dir info when needed since cached
1690 * attributes are invalid now.
1692 cifsInode->time = 0;
1694 d_inode(direntry)->i_ctime = inode->i_ctime = inode->i_mtime =
1695 current_time(inode);
1704 cifs_do_rename(const unsigned int xid, struct dentry *from_dentry,
1705 const char *from_path, struct dentry *to_dentry,
1706 const char *to_path)
1708 struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb);
1709 struct tcon_link *tlink;
1710 struct cifs_tcon *tcon;
1711 struct TCP_Server_Info *server;
1712 struct cifs_fid fid;
1713 struct cifs_open_parms oparms;
1716 tlink = cifs_sb_tlink(cifs_sb);
1718 return PTR_ERR(tlink);
1719 tcon = tlink_tcon(tlink);
1720 server = tcon->ses->server;
1722 if (!server->ops->rename)
1725 /* try path-based rename first */
1726 rc = server->ops->rename(xid, tcon, from_path, to_path, cifs_sb);
1729 * Don't bother with rename by filehandle unless file is busy and
1730 * source. Note that cross directory moves do not work with
1731 * rename by filehandle to various Windows servers.
1733 if (rc == 0 || rc != -EBUSY)
1734 goto do_rename_exit;
1736 /* Don't fall back to using SMB on SMB 2+ mount */
1737 if (server->vals->protocol_id != 0)
1738 goto do_rename_exit;
1740 /* open-file renames don't work across directories */
1741 if (to_dentry->d_parent != from_dentry->d_parent)
1742 goto do_rename_exit;
1745 oparms.cifs_sb = cifs_sb;
1746 /* open the file to be renamed -- we need DELETE perms */
1747 oparms.desired_access = DELETE;
1748 oparms.create_options = CREATE_NOT_DIR;
1749 oparms.disposition = FILE_OPEN;
1750 oparms.path = from_path;
1752 oparms.reconnect = false;
1754 rc = CIFS_open(xid, &oparms, &oplock, NULL);
1756 rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid,
1757 (const char *) to_dentry->d_name.name,
1758 cifs_sb->local_nls, cifs_remap(cifs_sb));
1759 CIFSSMBClose(xid, tcon, fid.netfid);
1762 cifs_put_tlink(tlink);
1767 cifs_rename2(struct inode *source_dir, struct dentry *source_dentry,
1768 struct inode *target_dir, struct dentry *target_dentry,
1771 char *from_name = NULL;
1772 char *to_name = NULL;
1773 struct cifs_sb_info *cifs_sb;
1774 struct tcon_link *tlink;
1775 struct cifs_tcon *tcon;
1776 FILE_UNIX_BASIC_INFO *info_buf_source = NULL;
1777 FILE_UNIX_BASIC_INFO *info_buf_target;
1781 if (flags & ~RENAME_NOREPLACE)
1784 cifs_sb = CIFS_SB(source_dir->i_sb);
1785 tlink = cifs_sb_tlink(cifs_sb);
1787 return PTR_ERR(tlink);
1788 tcon = tlink_tcon(tlink);
1793 * we already have the rename sem so we do not need to
1794 * grab it again here to protect the path integrity
1796 from_name = build_path_from_dentry(source_dentry);
1797 if (from_name == NULL) {
1799 goto cifs_rename_exit;
1802 to_name = build_path_from_dentry(target_dentry);
1803 if (to_name == NULL) {
1805 goto cifs_rename_exit;
1808 rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry,
1812 * No-replace is the natural behavior for CIFS, so skip unlink hacks.
1814 if (flags & RENAME_NOREPLACE)
1815 goto cifs_rename_exit;
1817 if (rc == -EEXIST && tcon->unix_ext) {
1819 * Are src and dst hardlinks of same inode? We can only tell
1820 * with unix extensions enabled.
1823 kmalloc_array(2, sizeof(FILE_UNIX_BASIC_INFO),
1825 if (info_buf_source == NULL) {
1827 goto cifs_rename_exit;
1830 info_buf_target = info_buf_source + 1;
1831 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, from_name,
1834 cifs_remap(cifs_sb));
1838 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, to_name,
1841 cifs_remap(cifs_sb));
1843 if (tmprc == 0 && (info_buf_source->UniqueId ==
1844 info_buf_target->UniqueId)) {
1845 /* same file, POSIX says that this is a noop */
1847 goto cifs_rename_exit;
1851 * else ... BB we could add the same check for Windows by
1852 * checking the UniqueId via FILE_INTERNAL_INFO
1856 /* Try unlinking the target dentry if it's not negative */
1857 if (d_really_is_positive(target_dentry) && (rc == -EACCES || rc == -EEXIST)) {
1858 if (d_is_dir(target_dentry))
1859 tmprc = cifs_rmdir(target_dir, target_dentry);
1861 tmprc = cifs_unlink(target_dir, target_dentry);
1863 goto cifs_rename_exit;
1864 rc = cifs_do_rename(xid, source_dentry, from_name,
1865 target_dentry, to_name);
1868 /* force revalidate to go get info when needed */
1869 CIFS_I(source_dir)->time = CIFS_I(target_dir)->time = 0;
1871 source_dir->i_ctime = source_dir->i_mtime = target_dir->i_ctime =
1872 target_dir->i_mtime = current_time(source_dir);
1875 kfree(info_buf_source);
1879 cifs_put_tlink(tlink);
1884 cifs_inode_needs_reval(struct inode *inode)
1886 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
1887 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1889 if (cifs_i->time == 0)
1892 if (CIFS_CACHE_READ(cifs_i))
1895 if (!lookupCacheEnabled)
1898 if (!cifs_sb->actimeo)
1901 if (!time_in_range(jiffies, cifs_i->time,
1902 cifs_i->time + cifs_sb->actimeo))
1905 /* hardlinked files w/ noserverino get "special" treatment */
1906 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) &&
1907 S_ISREG(inode->i_mode) && inode->i_nlink != 1)
1914 * Zap the cache. Called when invalid_mapping flag is set.
1917 cifs_invalidate_mapping(struct inode *inode)
1921 if (inode->i_mapping && inode->i_mapping->nrpages != 0) {
1922 rc = invalidate_inode_pages2(inode->i_mapping);
1924 cifs_dbg(VFS, "%s: could not invalidate inode %p\n",
1928 cifs_fscache_reset_inode_cookie(inode);
1933 * cifs_wait_bit_killable - helper for functions that are sleeping on bit locks
1934 * @word: long word containing the bit lock
1937 cifs_wait_bit_killable(struct wait_bit_key *key, int mode)
1939 freezable_schedule_unsafe();
1940 if (signal_pending_state(mode, current))
1941 return -ERESTARTSYS;
1946 cifs_revalidate_mapping(struct inode *inode)
1949 unsigned long *flags = &CIFS_I(inode)->flags;
1951 rc = wait_on_bit_lock_action(flags, CIFS_INO_LOCK, cifs_wait_bit_killable,
1956 if (test_and_clear_bit(CIFS_INO_INVALID_MAPPING, flags)) {
1957 rc = cifs_invalidate_mapping(inode);
1959 set_bit(CIFS_INO_INVALID_MAPPING, flags);
1962 clear_bit_unlock(CIFS_INO_LOCK, flags);
1963 smp_mb__after_atomic();
1964 wake_up_bit(flags, CIFS_INO_LOCK);
1970 cifs_zap_mapping(struct inode *inode)
1972 set_bit(CIFS_INO_INVALID_MAPPING, &CIFS_I(inode)->flags);
1973 return cifs_revalidate_mapping(inode);
1976 int cifs_revalidate_file_attr(struct file *filp)
1979 struct inode *inode = file_inode(filp);
1980 struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data;
1982 if (!cifs_inode_needs_reval(inode))
1985 if (tlink_tcon(cfile->tlink)->unix_ext)
1986 rc = cifs_get_file_info_unix(filp);
1988 rc = cifs_get_file_info(filp);
1993 int cifs_revalidate_dentry_attr(struct dentry *dentry)
1997 struct inode *inode = d_inode(dentry);
1998 struct super_block *sb = dentry->d_sb;
1999 char *full_path = NULL;
2004 if (!cifs_inode_needs_reval(inode))
2009 /* can not safely grab the rename sem here if rename calls revalidate
2010 since that would deadlock */
2011 full_path = build_path_from_dentry(dentry);
2012 if (full_path == NULL) {
2017 cifs_dbg(FYI, "Update attributes: %s inode 0x%p count %d dentry: 0x%p d_time %ld jiffies %ld\n",
2018 full_path, inode, inode->i_count.counter,
2019 dentry, cifs_get_time(dentry), jiffies);
2021 if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext)
2022 rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid);
2024 rc = cifs_get_inode_info(&inode, full_path, NULL, sb,
2033 int cifs_revalidate_file(struct file *filp)
2036 struct inode *inode = file_inode(filp);
2038 rc = cifs_revalidate_file_attr(filp);
2042 return cifs_revalidate_mapping(inode);
2045 /* revalidate a dentry's inode attributes */
2046 int cifs_revalidate_dentry(struct dentry *dentry)
2049 struct inode *inode = d_inode(dentry);
2051 rc = cifs_revalidate_dentry_attr(dentry);
2055 return cifs_revalidate_mapping(inode);
2058 int cifs_getattr(const struct path *path, struct kstat *stat,
2059 u32 request_mask, unsigned int flags)
2061 struct dentry *dentry = path->dentry;
2062 struct cifs_sb_info *cifs_sb = CIFS_SB(dentry->d_sb);
2063 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
2064 struct inode *inode = d_inode(dentry);
2068 * We need to be sure that all dirty pages are written and the server
2069 * has actual ctime, mtime and file length.
2071 if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
2072 inode->i_mapping->nrpages != 0) {
2073 rc = filemap_fdatawait(inode->i_mapping);
2075 mapping_set_error(inode->i_mapping, rc);
2080 rc = cifs_revalidate_dentry_attr(dentry);
2084 generic_fillattr(inode, stat);
2085 stat->blksize = cifs_sb->bsize;
2086 stat->ino = CIFS_I(inode)->uniqueid;
2088 /* old CIFS Unix Extensions doesn't return create time */
2089 if (CIFS_I(inode)->createtime) {
2090 stat->result_mask |= STATX_BTIME;
2092 cifs_NTtimeToUnix(cpu_to_le64(CIFS_I(inode)->createtime));
2095 stat->attributes_mask |= (STATX_ATTR_COMPRESSED | STATX_ATTR_ENCRYPTED);
2096 if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_COMPRESSED)
2097 stat->attributes |= STATX_ATTR_COMPRESSED;
2098 if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_ENCRYPTED)
2099 stat->attributes |= STATX_ATTR_ENCRYPTED;
2102 * If on a multiuser mount without unix extensions or cifsacl being
2103 * enabled, and the admin hasn't overridden them, set the ownership
2104 * to the fsuid/fsgid of the current process.
2106 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) &&
2107 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
2109 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID))
2110 stat->uid = current_fsuid();
2111 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID))
2112 stat->gid = current_fsgid();
2117 int cifs_fiemap(struct inode *inode, struct fiemap_extent_info *fei, u64 start,
2120 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2121 struct cifs_sb_info *cifs_sb = CIFS_SB(cifs_i->vfs_inode.i_sb);
2122 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
2123 struct TCP_Server_Info *server = tcon->ses->server;
2124 struct cifsFileInfo *cfile;
2128 * We need to be sure that all dirty pages are written as they
2129 * might fill holes on the server.
2131 if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
2132 inode->i_mapping->nrpages != 0) {
2133 rc = filemap_fdatawait(inode->i_mapping);
2135 mapping_set_error(inode->i_mapping, rc);
2140 cfile = find_readable_file(cifs_i, false);
2144 if (server->ops->fiemap) {
2145 rc = server->ops->fiemap(tcon, cfile, fei, start, len);
2146 cifsFileInfo_put(cfile);
2150 cifsFileInfo_put(cfile);
2154 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
2156 pgoff_t index = from >> PAGE_SHIFT;
2157 unsigned offset = from & (PAGE_SIZE - 1);
2161 page = grab_cache_page(mapping, index);
2165 zero_user_segment(page, offset, PAGE_SIZE);
2171 static void cifs_setsize(struct inode *inode, loff_t offset)
2173 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2175 spin_lock(&inode->i_lock);
2176 i_size_write(inode, offset);
2177 spin_unlock(&inode->i_lock);
2179 /* Cached inode must be refreshed on truncate */
2181 truncate_pagecache(inode, offset);
2185 cifs_set_file_size(struct inode *inode, struct iattr *attrs,
2186 unsigned int xid, char *full_path)
2189 struct cifsFileInfo *open_file;
2190 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2191 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2192 struct tcon_link *tlink = NULL;
2193 struct cifs_tcon *tcon = NULL;
2194 struct TCP_Server_Info *server;
2197 * To avoid spurious oplock breaks from server, in the case of
2198 * inodes that we already have open, avoid doing path based
2199 * setting of file size if we can do it by handle.
2200 * This keeps our caching token (oplock) and avoids timeouts
2201 * when the local oplock break takes longer to flush
2202 * writebehind data than the SMB timeout for the SetPathInfo
2203 * request would allow
2205 open_file = find_writable_file(cifsInode, true);
2207 tcon = tlink_tcon(open_file->tlink);
2208 server = tcon->ses->server;
2209 if (server->ops->set_file_size)
2210 rc = server->ops->set_file_size(xid, tcon, open_file,
2211 attrs->ia_size, false);
2214 cifsFileInfo_put(open_file);
2215 cifs_dbg(FYI, "SetFSize for attrs rc = %d\n", rc);
2223 tlink = cifs_sb_tlink(cifs_sb);
2225 return PTR_ERR(tlink);
2226 tcon = tlink_tcon(tlink);
2227 server = tcon->ses->server;
2231 * Set file size by pathname rather than by handle either because no
2232 * valid, writeable file handle for it was found or because there was
2233 * an error setting it by handle.
2235 if (server->ops->set_path_size)
2236 rc = server->ops->set_path_size(xid, tcon, full_path,
2237 attrs->ia_size, cifs_sb, false);
2240 cifs_dbg(FYI, "SetEOF by path (setattrs) rc = %d\n", rc);
2243 cifs_put_tlink(tlink);
2247 cifsInode->server_eof = attrs->ia_size;
2248 cifs_setsize(inode, attrs->ia_size);
2249 cifs_truncate_page(inode->i_mapping, inode->i_size);
2256 cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
2260 char *full_path = NULL;
2261 struct inode *inode = d_inode(direntry);
2262 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2263 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2264 struct tcon_link *tlink;
2265 struct cifs_tcon *pTcon;
2266 struct cifs_unix_set_info_args *args = NULL;
2267 struct cifsFileInfo *open_file;
2269 cifs_dbg(FYI, "setattr_unix on file %pd attrs->ia_valid=0x%x\n",
2270 direntry, attrs->ia_valid);
2274 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
2275 attrs->ia_valid |= ATTR_FORCE;
2277 rc = setattr_prepare(direntry, attrs);
2281 full_path = build_path_from_dentry(direntry);
2282 if (full_path == NULL) {
2288 * Attempt to flush data before changing attributes. We need to do
2289 * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the
2290 * ownership or mode then we may also need to do this. Here, we take
2291 * the safe way out and just do the flush on all setattr requests. If
2292 * the flush returns error, store it to report later and continue.
2294 * BB: This should be smarter. Why bother flushing pages that
2295 * will be truncated anyway? Also, should we error out here if
2296 * the flush returns error?
2298 rc = filemap_write_and_wait(inode->i_mapping);
2299 if (is_interrupt_error(rc)) {
2304 mapping_set_error(inode->i_mapping, rc);
2307 if (attrs->ia_valid & ATTR_SIZE) {
2308 rc = cifs_set_file_size(inode, attrs, xid, full_path);
2313 /* skip mode change if it's just for clearing setuid/setgid */
2314 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
2315 attrs->ia_valid &= ~ATTR_MODE;
2317 args = kmalloc(sizeof(*args), GFP_KERNEL);
2323 /* set up the struct */
2324 if (attrs->ia_valid & ATTR_MODE)
2325 args->mode = attrs->ia_mode;
2327 args->mode = NO_CHANGE_64;
2329 if (attrs->ia_valid & ATTR_UID)
2330 args->uid = attrs->ia_uid;
2332 args->uid = INVALID_UID; /* no change */
2334 if (attrs->ia_valid & ATTR_GID)
2335 args->gid = attrs->ia_gid;
2337 args->gid = INVALID_GID; /* no change */
2339 if (attrs->ia_valid & ATTR_ATIME)
2340 args->atime = cifs_UnixTimeToNT(attrs->ia_atime);
2342 args->atime = NO_CHANGE_64;
2344 if (attrs->ia_valid & ATTR_MTIME)
2345 args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime);
2347 args->mtime = NO_CHANGE_64;
2349 if (attrs->ia_valid & ATTR_CTIME)
2350 args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime);
2352 args->ctime = NO_CHANGE_64;
2355 open_file = find_writable_file(cifsInode, true);
2357 u16 nfid = open_file->fid.netfid;
2358 u32 npid = open_file->pid;
2359 pTcon = tlink_tcon(open_file->tlink);
2360 rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid);
2361 cifsFileInfo_put(open_file);
2363 tlink = cifs_sb_tlink(cifs_sb);
2364 if (IS_ERR(tlink)) {
2365 rc = PTR_ERR(tlink);
2368 pTcon = tlink_tcon(tlink);
2369 rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args,
2371 cifs_remap(cifs_sb));
2372 cifs_put_tlink(tlink);
2378 if ((attrs->ia_valid & ATTR_SIZE) &&
2379 attrs->ia_size != i_size_read(inode))
2380 truncate_setsize(inode, attrs->ia_size);
2382 setattr_copy(inode, attrs);
2383 mark_inode_dirty(inode);
2385 /* force revalidate when any of these times are set since some
2386 of the fs types (eg ext3, fat) do not have fine enough
2387 time granularity to match protocol, and we do not have a
2388 a way (yet) to query the server fs's time granularity (and
2389 whether it rounds times down).
2391 if (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME))
2392 cifsInode->time = 0;
2401 cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
2404 kuid_t uid = INVALID_UID;
2405 kgid_t gid = INVALID_GID;
2406 struct inode *inode = d_inode(direntry);
2407 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2408 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2409 struct cifsFileInfo *wfile;
2410 struct cifs_tcon *tcon;
2411 char *full_path = NULL;
2414 __u64 mode = NO_CHANGE_64;
2418 cifs_dbg(FYI, "setattr on file %pd attrs->ia_valid 0x%x\n",
2419 direntry, attrs->ia_valid);
2421 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
2422 attrs->ia_valid |= ATTR_FORCE;
2424 rc = setattr_prepare(direntry, attrs);
2430 full_path = build_path_from_dentry(direntry);
2431 if (full_path == NULL) {
2438 * Attempt to flush data before changing attributes. We need to do
2439 * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the
2440 * ownership or mode then we may also need to do this. Here, we take
2441 * the safe way out and just do the flush on all setattr requests. If
2442 * the flush returns error, store it to report later and continue.
2444 * BB: This should be smarter. Why bother flushing pages that
2445 * will be truncated anyway? Also, should we error out here if
2446 * the flush returns error?
2448 rc = filemap_write_and_wait(inode->i_mapping);
2449 if (is_interrupt_error(rc)) {
2451 goto cifs_setattr_exit;
2454 mapping_set_error(inode->i_mapping, rc);
2457 if (attrs->ia_valid & ATTR_MTIME) {
2458 rc = cifs_get_writable_file(cifsInode, false, &wfile);
2460 tcon = tlink_tcon(wfile->tlink);
2461 rc = tcon->ses->server->ops->flush(xid, tcon, &wfile->fid);
2462 cifsFileInfo_put(wfile);
2465 } else if (rc != -EBADF)
2471 if (attrs->ia_valid & ATTR_SIZE) {
2472 rc = cifs_set_file_size(inode, attrs, xid, full_path);
2474 goto cifs_setattr_exit;
2477 if (attrs->ia_valid & ATTR_UID)
2478 uid = attrs->ia_uid;
2480 if (attrs->ia_valid & ATTR_GID)
2481 gid = attrs->ia_gid;
2483 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
2484 if (uid_valid(uid) || gid_valid(gid)) {
2485 rc = id_mode_to_cifs_acl(inode, full_path, NO_CHANGE_64,
2488 cifs_dbg(FYI, "%s: Setting id failed with error: %d\n",
2490 goto cifs_setattr_exit;
2494 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID))
2495 attrs->ia_valid &= ~(ATTR_UID | ATTR_GID);
2497 /* skip mode change if it's just for clearing setuid/setgid */
2498 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
2499 attrs->ia_valid &= ~ATTR_MODE;
2501 if (attrs->ia_valid & ATTR_MODE) {
2502 mode = attrs->ia_mode;
2504 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
2505 rc = id_mode_to_cifs_acl(inode, full_path, mode,
2506 INVALID_UID, INVALID_GID);
2508 cifs_dbg(FYI, "%s: Setting ACL failed with error: %d\n",
2510 goto cifs_setattr_exit;
2513 if (((mode & S_IWUGO) == 0) &&
2514 (cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
2516 dosattr = cifsInode->cifsAttrs | ATTR_READONLY;
2518 /* fix up mode if we're not using dynperm */
2519 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
2520 attrs->ia_mode = inode->i_mode & ~S_IWUGO;
2521 } else if ((mode & S_IWUGO) &&
2522 (cifsInode->cifsAttrs & ATTR_READONLY)) {
2524 dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
2525 /* Attributes of 0 are ignored */
2527 dosattr |= ATTR_NORMAL;
2529 /* reset local inode permissions to normal */
2530 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2531 attrs->ia_mode &= ~(S_IALLUGO);
2532 if (S_ISDIR(inode->i_mode))
2534 cifs_sb->mnt_dir_mode;
2537 cifs_sb->mnt_file_mode;
2539 } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2540 /* ignore mode change - ATTR_READONLY hasn't changed */
2541 attrs->ia_valid &= ~ATTR_MODE;
2545 if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) ||
2546 ((attrs->ia_valid & ATTR_MODE) && dosattr)) {
2547 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
2548 /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */
2550 /* Even if error on time set, no sense failing the call if
2551 the server would set the time to a reasonable value anyway,
2552 and this check ensures that we are not being called from
2553 sys_utimes in which case we ought to fail the call back to
2554 the user when the server rejects the call */
2555 if ((rc) && (attrs->ia_valid &
2556 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
2560 /* do not need local check to inode_check_ok since the server does
2563 goto cifs_setattr_exit;
2565 if ((attrs->ia_valid & ATTR_SIZE) &&
2566 attrs->ia_size != i_size_read(inode))
2567 truncate_setsize(inode, attrs->ia_size);
2569 setattr_copy(inode, attrs);
2570 mark_inode_dirty(inode);
2579 cifs_setattr(struct dentry *direntry, struct iattr *attrs)
2581 struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
2582 struct cifs_tcon *pTcon = cifs_sb_master_tcon(cifs_sb);
2584 if (pTcon->unix_ext)
2585 return cifs_setattr_unix(direntry, attrs);
2587 return cifs_setattr_nounix(direntry, attrs);
2589 /* BB: add cifs_setattr_legacy for really old servers */
2593 void cifs_delete_inode(struct inode *inode)
2595 cifs_dbg(FYI, "In cifs_delete_inode, inode = 0x%p\n", inode);
2596 /* may have to add back in if and when safe distributed caching of
2597 directories added e.g. via FindNotify */