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 <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_MODE_FROM_SID) {
897 rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, true,
900 cifs_dbg(FYI, "%s: Get mode from SID failed. rc=%d\n",
904 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
905 rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, false,
908 cifs_dbg(FYI, "%s: Getting ACL failed with error: %d\n",
914 /* fill in remaining high mode bits e.g. SUID, VTX */
915 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
916 cifs_sfu_mode(&fattr, full_path, cifs_sb, xid);
918 /* check for Minshall+French symlinks */
919 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
920 tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr,
923 cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc);
927 *inode = cifs_iget(sb, &fattr);
931 /* we already have inode, update it */
933 /* if uniqueid is different, return error */
934 if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM &&
935 CIFS_I(*inode)->uniqueid != fattr.cf_uniqueid)) {
940 /* if filetype is different, return error */
941 if (unlikely(((*inode)->i_mode & S_IFMT) !=
942 (fattr.cf_mode & S_IFMT))) {
947 cifs_fattr_to_inode(*inode, &fattr);
951 if ((*inode) && ((*inode)->i_ino == 0))
952 cifs_dbg(FYI, "inode number of zero returned\n");
955 cifs_put_tlink(tlink);
959 static const struct inode_operations cifs_ipc_inode_ops = {
960 .lookup = cifs_lookup,
964 cifs_find_inode(struct inode *inode, void *opaque)
966 struct cifs_fattr *fattr = (struct cifs_fattr *) opaque;
968 /* don't match inode with different uniqueid */
969 if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid)
972 /* use createtime like an i_generation field */
973 if (CIFS_I(inode)->createtime != fattr->cf_createtime)
976 /* don't match inode of different type */
977 if ((inode->i_mode & S_IFMT) != (fattr->cf_mode & S_IFMT))
980 /* if it's not a directory or has no dentries, then flag it */
981 if (S_ISDIR(inode->i_mode) && !hlist_empty(&inode->i_dentry))
982 fattr->cf_flags |= CIFS_FATTR_INO_COLLISION;
988 cifs_init_inode(struct inode *inode, void *opaque)
990 struct cifs_fattr *fattr = (struct cifs_fattr *) opaque;
992 CIFS_I(inode)->uniqueid = fattr->cf_uniqueid;
993 CIFS_I(inode)->createtime = fattr->cf_createtime;
998 * walk dentry list for an inode and report whether it has aliases that
999 * are hashed. We use this to determine if a directory inode can actually
1003 inode_has_hashed_dentries(struct inode *inode)
1005 struct dentry *dentry;
1007 spin_lock(&inode->i_lock);
1008 hlist_for_each_entry(dentry, &inode->i_dentry, d_u.d_alias) {
1009 if (!d_unhashed(dentry) || IS_ROOT(dentry)) {
1010 spin_unlock(&inode->i_lock);
1014 spin_unlock(&inode->i_lock);
1018 /* Given fattrs, get a corresponding inode */
1020 cifs_iget(struct super_block *sb, struct cifs_fattr *fattr)
1023 struct inode *inode;
1026 cifs_dbg(FYI, "looking for uniqueid=%llu\n", fattr->cf_uniqueid);
1028 /* hash down to 32-bits on 32-bit arch */
1029 hash = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid);
1031 inode = iget5_locked(sb, hash, cifs_find_inode, cifs_init_inode, fattr);
1033 /* was there a potentially problematic inode collision? */
1034 if (fattr->cf_flags & CIFS_FATTR_INO_COLLISION) {
1035 fattr->cf_flags &= ~CIFS_FATTR_INO_COLLISION;
1037 if (inode_has_hashed_dentries(inode)) {
1038 cifs_autodisable_serverino(CIFS_SB(sb));
1040 fattr->cf_uniqueid = iunique(sb, ROOT_I);
1041 goto retry_iget5_locked;
1045 cifs_fattr_to_inode(inode, fattr);
1046 if (sb->s_flags & SB_NOATIME)
1047 inode->i_flags |= S_NOATIME | S_NOCMTIME;
1048 if (inode->i_state & I_NEW) {
1049 inode->i_ino = hash;
1050 #ifdef CONFIG_CIFS_FSCACHE
1051 /* initialize per-inode cache cookie pointer */
1052 CIFS_I(inode)->fscache = NULL;
1054 unlock_new_inode(inode);
1061 /* gets root inode */
1062 struct inode *cifs_root_iget(struct super_block *sb)
1065 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1066 struct inode *inode = NULL;
1068 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
1072 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH)
1073 && cifs_sb->prepath) {
1074 len = strlen(cifs_sb->prepath);
1075 path = kzalloc(len + 2 /* leading sep + null */, GFP_KERNEL);
1077 return ERR_PTR(-ENOMEM);
1079 memcpy(path+1, cifs_sb->prepath, len);
1081 path = kstrdup("", GFP_KERNEL);
1083 return ERR_PTR(-ENOMEM);
1087 if (tcon->unix_ext) {
1088 rc = cifs_get_inode_info_unix(&inode, path, sb, xid);
1089 /* some servers mistakenly claim POSIX support */
1090 if (rc != -EOPNOTSUPP)
1092 cifs_dbg(VFS, "server does not support POSIX extensions");
1093 tcon->unix_ext = false;
1096 convert_delimiter(path, CIFS_DIR_SEP(cifs_sb));
1097 rc = cifs_get_inode_info(&inode, path, NULL, sb, xid, NULL);
1101 inode = ERR_PTR(rc);
1105 #ifdef CONFIG_CIFS_FSCACHE
1106 /* populate tcon->resource_id */
1107 tcon->resource_id = CIFS_I(inode)->uniqueid;
1110 if (rc && tcon->pipe) {
1111 cifs_dbg(FYI, "ipc connection - fake read inode\n");
1112 spin_lock(&inode->i_lock);
1113 inode->i_mode |= S_IFDIR;
1114 set_nlink(inode, 2);
1115 inode->i_op = &cifs_ipc_inode_ops;
1116 inode->i_fop = &simple_dir_operations;
1117 inode->i_uid = cifs_sb->mnt_uid;
1118 inode->i_gid = cifs_sb->mnt_gid;
1119 spin_unlock(&inode->i_lock);
1122 inode = ERR_PTR(rc);
1132 cifs_set_file_info(struct inode *inode, struct iattr *attrs, unsigned int xid,
1133 char *full_path, __u32 dosattr)
1135 bool set_time = false;
1136 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1137 struct TCP_Server_Info *server;
1138 FILE_BASIC_INFO info_buf;
1143 server = cifs_sb_master_tcon(cifs_sb)->ses->server;
1144 if (!server->ops->set_file_info)
1149 if (attrs->ia_valid & ATTR_ATIME) {
1151 info_buf.LastAccessTime =
1152 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1154 info_buf.LastAccessTime = 0;
1156 if (attrs->ia_valid & ATTR_MTIME) {
1158 info_buf.LastWriteTime =
1159 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1161 info_buf.LastWriteTime = 0;
1164 * Samba throws this field away, but windows may actually use it.
1165 * Do not set ctime unless other time stamps are changed explicitly
1166 * (i.e. by utimes()) since we would then have a mix of client and
1169 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1170 cifs_dbg(FYI, "CIFS - CTIME changed\n");
1171 info_buf.ChangeTime =
1172 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1174 info_buf.ChangeTime = 0;
1176 info_buf.CreationTime = 0; /* don't change */
1177 info_buf.Attributes = cpu_to_le32(dosattr);
1179 return server->ops->set_file_info(inode, full_path, &info_buf, xid);
1183 * Open the given file (if it isn't already), set the DELETE_ON_CLOSE bit
1184 * and rename it to a random name that hopefully won't conflict with
1188 cifs_rename_pending_delete(const char *full_path, struct dentry *dentry,
1189 const unsigned int xid)
1193 struct cifs_fid fid;
1194 struct cifs_open_parms oparms;
1195 struct inode *inode = d_inode(dentry);
1196 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1197 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1198 struct tcon_link *tlink;
1199 struct cifs_tcon *tcon;
1200 __u32 dosattr, origattr;
1201 FILE_BASIC_INFO *info_buf = NULL;
1203 tlink = cifs_sb_tlink(cifs_sb);
1205 return PTR_ERR(tlink);
1206 tcon = tlink_tcon(tlink);
1209 * We cannot rename the file if the server doesn't support
1210 * CAP_INFOLEVEL_PASSTHRU
1212 if (!(tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)) {
1218 oparms.cifs_sb = cifs_sb;
1219 oparms.desired_access = DELETE | FILE_WRITE_ATTRIBUTES;
1220 oparms.create_options = CREATE_NOT_DIR;
1221 oparms.disposition = FILE_OPEN;
1222 oparms.path = full_path;
1224 oparms.reconnect = false;
1226 rc = CIFS_open(xid, &oparms, &oplock, NULL);
1230 origattr = cifsInode->cifsAttrs;
1232 origattr |= ATTR_NORMAL;
1234 dosattr = origattr & ~ATTR_READONLY;
1236 dosattr |= ATTR_NORMAL;
1237 dosattr |= ATTR_HIDDEN;
1239 /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */
1240 if (dosattr != origattr) {
1241 info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL);
1242 if (info_buf == NULL) {
1246 info_buf->Attributes = cpu_to_le32(dosattr);
1247 rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid,
1249 /* although we would like to mark the file hidden
1250 if that fails we will still try to rename it */
1252 cifsInode->cifsAttrs = dosattr;
1254 dosattr = origattr; /* since not able to change them */
1257 /* rename the file */
1258 rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, NULL,
1260 cifs_remap(cifs_sb));
1266 /* try to set DELETE_ON_CLOSE */
1267 if (!test_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags)) {
1268 rc = CIFSSMBSetFileDisposition(xid, tcon, true, fid.netfid,
1271 * some samba versions return -ENOENT when we try to set the
1272 * file disposition here. Likely a samba bug, but work around
1273 * it for now. This means that some cifsXXX files may hang
1274 * around after they shouldn't.
1276 * BB: remove this hack after more servers have the fix
1284 set_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags);
1288 CIFSSMBClose(xid, tcon, fid.netfid);
1291 cifs_put_tlink(tlink);
1295 * reset everything back to the original state. Don't bother
1296 * dealing with errors here since we can't do anything about
1300 CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, dentry->d_name.name,
1301 cifs_sb->local_nls, cifs_remap(cifs_sb));
1303 if (dosattr != origattr) {
1304 info_buf->Attributes = cpu_to_le32(origattr);
1305 if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid,
1307 cifsInode->cifsAttrs = origattr;
1313 /* copied from fs/nfs/dir.c with small changes */
1315 cifs_drop_nlink(struct inode *inode)
1317 spin_lock(&inode->i_lock);
1318 if (inode->i_nlink > 0)
1320 spin_unlock(&inode->i_lock);
1324 * If d_inode(dentry) is null (usually meaning the cached dentry
1325 * is a negative dentry) then we would attempt a standard SMB delete, but
1326 * if that fails we can not attempt the fall back mechanisms on EACCES
1327 * but will return the EACCES to the caller. Note that the VFS does not call
1328 * unlink on negative dentries currently.
1330 int cifs_unlink(struct inode *dir, struct dentry *dentry)
1334 char *full_path = NULL;
1335 struct inode *inode = d_inode(dentry);
1336 struct cifsInodeInfo *cifs_inode;
1337 struct super_block *sb = dir->i_sb;
1338 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1339 struct tcon_link *tlink;
1340 struct cifs_tcon *tcon;
1341 struct TCP_Server_Info *server;
1342 struct iattr *attrs = NULL;
1343 __u32 dosattr = 0, origattr = 0;
1345 cifs_dbg(FYI, "cifs_unlink, dir=0x%p, dentry=0x%p\n", dir, dentry);
1347 tlink = cifs_sb_tlink(cifs_sb);
1349 return PTR_ERR(tlink);
1350 tcon = tlink_tcon(tlink);
1351 server = tcon->ses->server;
1355 /* Unlink can be called from rename so we can not take the
1356 * sb->s_vfs_rename_mutex here */
1357 full_path = build_path_from_dentry(dentry);
1358 if (full_path == NULL) {
1363 if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1364 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1365 rc = CIFSPOSIXDelFile(xid, tcon, full_path,
1366 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
1367 cifs_remap(cifs_sb));
1368 cifs_dbg(FYI, "posix del rc %d\n", rc);
1369 if ((rc == 0) || (rc == -ENOENT))
1370 goto psx_del_no_retry;
1374 if (!server->ops->unlink) {
1376 goto psx_del_no_retry;
1379 rc = server->ops->unlink(xid, tcon, full_path, cifs_sb);
1384 cifs_drop_nlink(inode);
1385 } else if (rc == -ENOENT) {
1387 } else if (rc == -EBUSY) {
1388 if (server->ops->rename_pending_delete) {
1389 rc = server->ops->rename_pending_delete(full_path,
1392 cifs_drop_nlink(inode);
1394 } else if ((rc == -EACCES) && (dosattr == 0) && inode) {
1395 attrs = kzalloc(sizeof(*attrs), GFP_KERNEL);
1396 if (attrs == NULL) {
1401 /* try to reset dos attributes */
1402 cifs_inode = CIFS_I(inode);
1403 origattr = cifs_inode->cifsAttrs;
1405 origattr |= ATTR_NORMAL;
1406 dosattr = origattr & ~ATTR_READONLY;
1408 dosattr |= ATTR_NORMAL;
1409 dosattr |= ATTR_HIDDEN;
1411 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
1415 goto retry_std_delete;
1418 /* undo the setattr if we errored out and it's needed */
1419 if (rc != 0 && dosattr != 0)
1420 cifs_set_file_info(inode, attrs, xid, full_path, origattr);
1424 cifs_inode = CIFS_I(inode);
1425 cifs_inode->time = 0; /* will force revalidate to get info
1427 inode->i_ctime = current_time(inode);
1429 dir->i_ctime = dir->i_mtime = current_time(dir);
1430 cifs_inode = CIFS_I(dir);
1431 CIFS_I(dir)->time = 0; /* force revalidate of dir as well */
1436 cifs_put_tlink(tlink);
1441 cifs_mkdir_qinfo(struct inode *parent, struct dentry *dentry, umode_t mode,
1442 const char *full_path, struct cifs_sb_info *cifs_sb,
1443 struct cifs_tcon *tcon, const unsigned int xid)
1446 struct inode *inode = NULL;
1449 rc = cifs_get_inode_info_unix(&inode, full_path, parent->i_sb,
1452 rc = cifs_get_inode_info(&inode, full_path, NULL, parent->i_sb,
1459 * setting nlink not necessary except in cases where we failed to get it
1460 * from the server or was set bogus. Also, since this is a brand new
1461 * inode, no need to grab the i_lock before setting the i_nlink.
1463 if (inode->i_nlink < 2)
1464 set_nlink(inode, 2);
1465 mode &= ~current_umask();
1466 /* must turn on setgid bit if parent dir has it */
1467 if (parent->i_mode & S_ISGID)
1470 if (tcon->unix_ext) {
1471 struct cifs_unix_set_info_args args = {
1473 .ctime = NO_CHANGE_64,
1474 .atime = NO_CHANGE_64,
1475 .mtime = NO_CHANGE_64,
1478 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1479 args.uid = current_fsuid();
1480 if (parent->i_mode & S_ISGID)
1481 args.gid = parent->i_gid;
1483 args.gid = current_fsgid();
1485 args.uid = INVALID_UID; /* no change */
1486 args.gid = INVALID_GID; /* no change */
1488 CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args,
1490 cifs_remap(cifs_sb));
1492 struct TCP_Server_Info *server = tcon->ses->server;
1493 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
1494 (mode & S_IWUGO) == 0 && server->ops->mkdir_setinfo)
1495 server->ops->mkdir_setinfo(inode, full_path, cifs_sb,
1497 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
1498 inode->i_mode = (mode | S_IFDIR);
1500 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1501 inode->i_uid = current_fsuid();
1502 if (inode->i_mode & S_ISGID)
1503 inode->i_gid = parent->i_gid;
1505 inode->i_gid = current_fsgid();
1508 d_instantiate(dentry, inode);
1513 cifs_posix_mkdir(struct inode *inode, struct dentry *dentry, umode_t mode,
1514 const char *full_path, struct cifs_sb_info *cifs_sb,
1515 struct cifs_tcon *tcon, const unsigned int xid)
1519 FILE_UNIX_BASIC_INFO *info = NULL;
1520 struct inode *newinode = NULL;
1521 struct cifs_fattr fattr;
1523 info = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1526 goto posix_mkdir_out;
1529 mode &= ~current_umask();
1530 rc = CIFSPOSIXCreate(xid, tcon, SMB_O_DIRECTORY | SMB_O_CREAT, mode,
1531 NULL /* netfid */, info, &oplock, full_path,
1532 cifs_sb->local_nls, cifs_remap(cifs_sb));
1533 if (rc == -EOPNOTSUPP)
1534 goto posix_mkdir_out;
1536 cifs_dbg(FYI, "posix mkdir returned 0x%x\n", rc);
1538 goto posix_mkdir_out;
1541 if (info->Type == cpu_to_le32(-1))
1542 /* no return info, go query for it */
1543 goto posix_mkdir_get_info;
1545 * BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if
1546 * need to set uid/gid.
1549 cifs_unix_basic_to_fattr(&fattr, info, cifs_sb);
1550 cifs_fill_uniqueid(inode->i_sb, &fattr);
1551 newinode = cifs_iget(inode->i_sb, &fattr);
1553 goto posix_mkdir_get_info;
1555 d_instantiate(dentry, newinode);
1557 #ifdef CONFIG_CIFS_DEBUG2
1558 cifs_dbg(FYI, "instantiated dentry %p %pd to inode %p\n",
1559 dentry, dentry, newinode);
1561 if (newinode->i_nlink != 2)
1562 cifs_dbg(FYI, "unexpected number of links %d\n",
1569 posix_mkdir_get_info:
1570 rc = cifs_mkdir_qinfo(inode, dentry, mode, full_path, cifs_sb, tcon,
1572 goto posix_mkdir_out;
1575 int cifs_mkdir(struct inode *inode, struct dentry *direntry, umode_t mode)
1579 struct cifs_sb_info *cifs_sb;
1580 struct tcon_link *tlink;
1581 struct cifs_tcon *tcon;
1582 struct TCP_Server_Info *server;
1585 cifs_dbg(FYI, "In cifs_mkdir, mode = 0x%hx inode = 0x%p\n",
1588 cifs_sb = CIFS_SB(inode->i_sb);
1589 tlink = cifs_sb_tlink(cifs_sb);
1591 return PTR_ERR(tlink);
1592 tcon = tlink_tcon(tlink);
1596 full_path = build_path_from_dentry(direntry);
1597 if (full_path == NULL) {
1602 server = tcon->ses->server;
1604 if ((server->ops->posix_mkdir) && (tcon->posix_extensions)) {
1605 rc = server->ops->posix_mkdir(xid, inode, mode, tcon, full_path,
1607 d_drop(direntry); /* for time being always refresh inode info */
1611 if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1612 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1613 rc = cifs_posix_mkdir(inode, direntry, mode, full_path, cifs_sb,
1615 if (rc != -EOPNOTSUPP)
1619 if (!server->ops->mkdir) {
1624 /* BB add setting the equivalent of mode via CreateX w/ACLs */
1625 rc = server->ops->mkdir(xid, tcon, full_path, cifs_sb);
1627 cifs_dbg(FYI, "cifs_mkdir returned 0x%x\n", rc);
1632 rc = cifs_mkdir_qinfo(inode, direntry, mode, full_path, cifs_sb, tcon,
1636 * Force revalidate to get parent dir info when needed since cached
1637 * attributes are invalid now.
1639 CIFS_I(inode)->time = 0;
1642 cifs_put_tlink(tlink);
1646 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1650 struct cifs_sb_info *cifs_sb;
1651 struct tcon_link *tlink;
1652 struct cifs_tcon *tcon;
1653 struct TCP_Server_Info *server;
1654 char *full_path = NULL;
1655 struct cifsInodeInfo *cifsInode;
1657 cifs_dbg(FYI, "cifs_rmdir, inode = 0x%p\n", inode);
1661 full_path = build_path_from_dentry(direntry);
1662 if (full_path == NULL) {
1667 cifs_sb = CIFS_SB(inode->i_sb);
1668 tlink = cifs_sb_tlink(cifs_sb);
1669 if (IS_ERR(tlink)) {
1670 rc = PTR_ERR(tlink);
1673 tcon = tlink_tcon(tlink);
1674 server = tcon->ses->server;
1676 if (!server->ops->rmdir) {
1678 cifs_put_tlink(tlink);
1682 rc = server->ops->rmdir(xid, tcon, full_path, cifs_sb);
1683 cifs_put_tlink(tlink);
1686 spin_lock(&d_inode(direntry)->i_lock);
1687 i_size_write(d_inode(direntry), 0);
1688 clear_nlink(d_inode(direntry));
1689 spin_unlock(&d_inode(direntry)->i_lock);
1692 cifsInode = CIFS_I(d_inode(direntry));
1693 /* force revalidate to go get info when needed */
1694 cifsInode->time = 0;
1696 cifsInode = CIFS_I(inode);
1698 * Force revalidate to get parent dir info when needed since cached
1699 * attributes are invalid now.
1701 cifsInode->time = 0;
1703 d_inode(direntry)->i_ctime = inode->i_ctime = inode->i_mtime =
1704 current_time(inode);
1713 cifs_do_rename(const unsigned int xid, struct dentry *from_dentry,
1714 const char *from_path, struct dentry *to_dentry,
1715 const char *to_path)
1717 struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb);
1718 struct tcon_link *tlink;
1719 struct cifs_tcon *tcon;
1720 struct TCP_Server_Info *server;
1721 struct cifs_fid fid;
1722 struct cifs_open_parms oparms;
1725 tlink = cifs_sb_tlink(cifs_sb);
1727 return PTR_ERR(tlink);
1728 tcon = tlink_tcon(tlink);
1729 server = tcon->ses->server;
1731 if (!server->ops->rename)
1734 /* try path-based rename first */
1735 rc = server->ops->rename(xid, tcon, from_path, to_path, cifs_sb);
1738 * Don't bother with rename by filehandle unless file is busy and
1739 * source. Note that cross directory moves do not work with
1740 * rename by filehandle to various Windows servers.
1742 if (rc == 0 || rc != -EBUSY)
1743 goto do_rename_exit;
1745 /* Don't fall back to using SMB on SMB 2+ mount */
1746 if (server->vals->protocol_id != 0)
1747 goto do_rename_exit;
1749 /* open-file renames don't work across directories */
1750 if (to_dentry->d_parent != from_dentry->d_parent)
1751 goto do_rename_exit;
1754 oparms.cifs_sb = cifs_sb;
1755 /* open the file to be renamed -- we need DELETE perms */
1756 oparms.desired_access = DELETE;
1757 oparms.create_options = CREATE_NOT_DIR;
1758 oparms.disposition = FILE_OPEN;
1759 oparms.path = from_path;
1761 oparms.reconnect = false;
1763 rc = CIFS_open(xid, &oparms, &oplock, NULL);
1765 rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid,
1766 (const char *) to_dentry->d_name.name,
1767 cifs_sb->local_nls, cifs_remap(cifs_sb));
1768 CIFSSMBClose(xid, tcon, fid.netfid);
1771 cifs_put_tlink(tlink);
1776 cifs_rename2(struct inode *source_dir, struct dentry *source_dentry,
1777 struct inode *target_dir, struct dentry *target_dentry,
1780 char *from_name = NULL;
1781 char *to_name = NULL;
1782 struct cifs_sb_info *cifs_sb;
1783 struct tcon_link *tlink;
1784 struct cifs_tcon *tcon;
1785 FILE_UNIX_BASIC_INFO *info_buf_source = NULL;
1786 FILE_UNIX_BASIC_INFO *info_buf_target;
1790 if (flags & ~RENAME_NOREPLACE)
1793 cifs_sb = CIFS_SB(source_dir->i_sb);
1794 tlink = cifs_sb_tlink(cifs_sb);
1796 return PTR_ERR(tlink);
1797 tcon = tlink_tcon(tlink);
1802 * we already have the rename sem so we do not need to
1803 * grab it again here to protect the path integrity
1805 from_name = build_path_from_dentry(source_dentry);
1806 if (from_name == NULL) {
1808 goto cifs_rename_exit;
1811 to_name = build_path_from_dentry(target_dentry);
1812 if (to_name == NULL) {
1814 goto cifs_rename_exit;
1817 rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry,
1821 * No-replace is the natural behavior for CIFS, so skip unlink hacks.
1823 if (flags & RENAME_NOREPLACE)
1824 goto cifs_rename_exit;
1826 if (rc == -EEXIST && tcon->unix_ext) {
1828 * Are src and dst hardlinks of same inode? We can only tell
1829 * with unix extensions enabled.
1832 kmalloc_array(2, sizeof(FILE_UNIX_BASIC_INFO),
1834 if (info_buf_source == NULL) {
1836 goto cifs_rename_exit;
1839 info_buf_target = info_buf_source + 1;
1840 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, from_name,
1843 cifs_remap(cifs_sb));
1847 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, to_name,
1850 cifs_remap(cifs_sb));
1852 if (tmprc == 0 && (info_buf_source->UniqueId ==
1853 info_buf_target->UniqueId)) {
1854 /* same file, POSIX says that this is a noop */
1856 goto cifs_rename_exit;
1860 * else ... BB we could add the same check for Windows by
1861 * checking the UniqueId via FILE_INTERNAL_INFO
1865 /* Try unlinking the target dentry if it's not negative */
1866 if (d_really_is_positive(target_dentry) && (rc == -EACCES || rc == -EEXIST)) {
1867 if (d_is_dir(target_dentry))
1868 tmprc = cifs_rmdir(target_dir, target_dentry);
1870 tmprc = cifs_unlink(target_dir, target_dentry);
1872 goto cifs_rename_exit;
1873 rc = cifs_do_rename(xid, source_dentry, from_name,
1874 target_dentry, to_name);
1877 /* force revalidate to go get info when needed */
1878 CIFS_I(source_dir)->time = CIFS_I(target_dir)->time = 0;
1880 source_dir->i_ctime = source_dir->i_mtime = target_dir->i_ctime =
1881 target_dir->i_mtime = current_time(source_dir);
1884 kfree(info_buf_source);
1888 cifs_put_tlink(tlink);
1893 cifs_inode_needs_reval(struct inode *inode)
1895 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
1896 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1898 if (cifs_i->time == 0)
1901 if (CIFS_CACHE_READ(cifs_i))
1904 if (!lookupCacheEnabled)
1907 if (!cifs_sb->actimeo)
1910 if (!time_in_range(jiffies, cifs_i->time,
1911 cifs_i->time + cifs_sb->actimeo))
1914 /* hardlinked files w/ noserverino get "special" treatment */
1915 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) &&
1916 S_ISREG(inode->i_mode) && inode->i_nlink != 1)
1923 * Zap the cache. Called when invalid_mapping flag is set.
1926 cifs_invalidate_mapping(struct inode *inode)
1930 if (inode->i_mapping && inode->i_mapping->nrpages != 0) {
1931 rc = invalidate_inode_pages2(inode->i_mapping);
1933 cifs_dbg(VFS, "%s: could not invalidate inode %p\n",
1937 cifs_fscache_reset_inode_cookie(inode);
1942 * cifs_wait_bit_killable - helper for functions that are sleeping on bit locks
1943 * @word: long word containing the bit lock
1946 cifs_wait_bit_killable(struct wait_bit_key *key, int mode)
1948 freezable_schedule_unsafe();
1949 if (signal_pending_state(mode, current))
1950 return -ERESTARTSYS;
1955 cifs_revalidate_mapping(struct inode *inode)
1958 unsigned long *flags = &CIFS_I(inode)->flags;
1960 rc = wait_on_bit_lock_action(flags, CIFS_INO_LOCK, cifs_wait_bit_killable,
1965 if (test_and_clear_bit(CIFS_INO_INVALID_MAPPING, flags)) {
1966 rc = cifs_invalidate_mapping(inode);
1968 set_bit(CIFS_INO_INVALID_MAPPING, flags);
1971 clear_bit_unlock(CIFS_INO_LOCK, flags);
1972 smp_mb__after_atomic();
1973 wake_up_bit(flags, CIFS_INO_LOCK);
1979 cifs_zap_mapping(struct inode *inode)
1981 set_bit(CIFS_INO_INVALID_MAPPING, &CIFS_I(inode)->flags);
1982 return cifs_revalidate_mapping(inode);
1985 int cifs_revalidate_file_attr(struct file *filp)
1988 struct inode *inode = file_inode(filp);
1989 struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data;
1991 if (!cifs_inode_needs_reval(inode))
1994 if (tlink_tcon(cfile->tlink)->unix_ext)
1995 rc = cifs_get_file_info_unix(filp);
1997 rc = cifs_get_file_info(filp);
2002 int cifs_revalidate_dentry_attr(struct dentry *dentry)
2006 struct inode *inode = d_inode(dentry);
2007 struct super_block *sb = dentry->d_sb;
2008 char *full_path = NULL;
2013 if (!cifs_inode_needs_reval(inode))
2018 /* can not safely grab the rename sem here if rename calls revalidate
2019 since that would deadlock */
2020 full_path = build_path_from_dentry(dentry);
2021 if (full_path == NULL) {
2026 cifs_dbg(FYI, "Update attributes: %s inode 0x%p count %d dentry: 0x%p d_time %ld jiffies %ld\n",
2027 full_path, inode, inode->i_count.counter,
2028 dentry, cifs_get_time(dentry), jiffies);
2030 if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext)
2031 rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid);
2033 rc = cifs_get_inode_info(&inode, full_path, NULL, sb,
2042 int cifs_revalidate_file(struct file *filp)
2045 struct inode *inode = file_inode(filp);
2047 rc = cifs_revalidate_file_attr(filp);
2051 return cifs_revalidate_mapping(inode);
2054 /* revalidate a dentry's inode attributes */
2055 int cifs_revalidate_dentry(struct dentry *dentry)
2058 struct inode *inode = d_inode(dentry);
2060 rc = cifs_revalidate_dentry_attr(dentry);
2064 return cifs_revalidate_mapping(inode);
2067 int cifs_getattr(const struct path *path, struct kstat *stat,
2068 u32 request_mask, unsigned int flags)
2070 struct dentry *dentry = path->dentry;
2071 struct cifs_sb_info *cifs_sb = CIFS_SB(dentry->d_sb);
2072 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
2073 struct inode *inode = d_inode(dentry);
2077 * We need to be sure that all dirty pages are written and the server
2078 * has actual ctime, mtime and file length.
2080 if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
2081 inode->i_mapping->nrpages != 0) {
2082 rc = filemap_fdatawait(inode->i_mapping);
2084 mapping_set_error(inode->i_mapping, rc);
2089 rc = cifs_revalidate_dentry_attr(dentry);
2093 generic_fillattr(inode, stat);
2094 stat->blksize = cifs_sb->bsize;
2095 stat->ino = CIFS_I(inode)->uniqueid;
2097 /* old CIFS Unix Extensions doesn't return create time */
2098 if (CIFS_I(inode)->createtime) {
2099 stat->result_mask |= STATX_BTIME;
2101 cifs_NTtimeToUnix(cpu_to_le64(CIFS_I(inode)->createtime));
2104 stat->attributes_mask |= (STATX_ATTR_COMPRESSED | STATX_ATTR_ENCRYPTED);
2105 if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_COMPRESSED)
2106 stat->attributes |= STATX_ATTR_COMPRESSED;
2107 if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_ENCRYPTED)
2108 stat->attributes |= STATX_ATTR_ENCRYPTED;
2111 * If on a multiuser mount without unix extensions or cifsacl being
2112 * enabled, and the admin hasn't overridden them, set the ownership
2113 * to the fsuid/fsgid of the current process.
2115 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) &&
2116 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
2118 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID))
2119 stat->uid = current_fsuid();
2120 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID))
2121 stat->gid = current_fsgid();
2126 int cifs_fiemap(struct inode *inode, struct fiemap_extent_info *fei, u64 start,
2129 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2130 struct cifs_sb_info *cifs_sb = CIFS_SB(cifs_i->vfs_inode.i_sb);
2131 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
2132 struct TCP_Server_Info *server = tcon->ses->server;
2133 struct cifsFileInfo *cfile;
2137 * We need to be sure that all dirty pages are written as they
2138 * might fill holes on the server.
2140 if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
2141 inode->i_mapping->nrpages != 0) {
2142 rc = filemap_fdatawait(inode->i_mapping);
2144 mapping_set_error(inode->i_mapping, rc);
2149 cfile = find_readable_file(cifs_i, false);
2153 if (server->ops->fiemap) {
2154 rc = server->ops->fiemap(tcon, cfile, fei, start, len);
2155 cifsFileInfo_put(cfile);
2159 cifsFileInfo_put(cfile);
2163 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
2165 pgoff_t index = from >> PAGE_SHIFT;
2166 unsigned offset = from & (PAGE_SIZE - 1);
2170 page = grab_cache_page(mapping, index);
2174 zero_user_segment(page, offset, PAGE_SIZE);
2180 static void cifs_setsize(struct inode *inode, loff_t offset)
2182 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2184 spin_lock(&inode->i_lock);
2185 i_size_write(inode, offset);
2186 spin_unlock(&inode->i_lock);
2188 /* Cached inode must be refreshed on truncate */
2190 truncate_pagecache(inode, offset);
2194 cifs_set_file_size(struct inode *inode, struct iattr *attrs,
2195 unsigned int xid, char *full_path)
2198 struct cifsFileInfo *open_file;
2199 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2200 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2201 struct tcon_link *tlink = NULL;
2202 struct cifs_tcon *tcon = NULL;
2203 struct TCP_Server_Info *server;
2206 * To avoid spurious oplock breaks from server, in the case of
2207 * inodes that we already have open, avoid doing path based
2208 * setting of file size if we can do it by handle.
2209 * This keeps our caching token (oplock) and avoids timeouts
2210 * when the local oplock break takes longer to flush
2211 * writebehind data than the SMB timeout for the SetPathInfo
2212 * request would allow
2214 open_file = find_writable_file(cifsInode, true);
2216 tcon = tlink_tcon(open_file->tlink);
2217 server = tcon->ses->server;
2218 if (server->ops->set_file_size)
2219 rc = server->ops->set_file_size(xid, tcon, open_file,
2220 attrs->ia_size, false);
2223 cifsFileInfo_put(open_file);
2224 cifs_dbg(FYI, "SetFSize for attrs rc = %d\n", rc);
2232 tlink = cifs_sb_tlink(cifs_sb);
2234 return PTR_ERR(tlink);
2235 tcon = tlink_tcon(tlink);
2236 server = tcon->ses->server;
2240 * Set file size by pathname rather than by handle either because no
2241 * valid, writeable file handle for it was found or because there was
2242 * an error setting it by handle.
2244 if (server->ops->set_path_size)
2245 rc = server->ops->set_path_size(xid, tcon, full_path,
2246 attrs->ia_size, cifs_sb, false);
2249 cifs_dbg(FYI, "SetEOF by path (setattrs) rc = %d\n", rc);
2252 cifs_put_tlink(tlink);
2256 cifsInode->server_eof = attrs->ia_size;
2257 cifs_setsize(inode, attrs->ia_size);
2258 cifs_truncate_page(inode->i_mapping, inode->i_size);
2265 cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
2269 char *full_path = NULL;
2270 struct inode *inode = d_inode(direntry);
2271 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2272 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2273 struct tcon_link *tlink;
2274 struct cifs_tcon *pTcon;
2275 struct cifs_unix_set_info_args *args = NULL;
2276 struct cifsFileInfo *open_file;
2278 cifs_dbg(FYI, "setattr_unix on file %pd attrs->ia_valid=0x%x\n",
2279 direntry, attrs->ia_valid);
2283 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
2284 attrs->ia_valid |= ATTR_FORCE;
2286 rc = setattr_prepare(direntry, attrs);
2290 full_path = build_path_from_dentry(direntry);
2291 if (full_path == NULL) {
2297 * Attempt to flush data before changing attributes. We need to do
2298 * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the
2299 * ownership or mode then we may also need to do this. Here, we take
2300 * the safe way out and just do the flush on all setattr requests. If
2301 * the flush returns error, store it to report later and continue.
2303 * BB: This should be smarter. Why bother flushing pages that
2304 * will be truncated anyway? Also, should we error out here if
2305 * the flush returns error?
2307 rc = filemap_write_and_wait(inode->i_mapping);
2308 if (is_interrupt_error(rc)) {
2313 mapping_set_error(inode->i_mapping, rc);
2316 if (attrs->ia_valid & ATTR_SIZE) {
2317 rc = cifs_set_file_size(inode, attrs, xid, full_path);
2322 /* skip mode change if it's just for clearing setuid/setgid */
2323 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
2324 attrs->ia_valid &= ~ATTR_MODE;
2326 args = kmalloc(sizeof(*args), GFP_KERNEL);
2332 /* set up the struct */
2333 if (attrs->ia_valid & ATTR_MODE)
2334 args->mode = attrs->ia_mode;
2336 args->mode = NO_CHANGE_64;
2338 if (attrs->ia_valid & ATTR_UID)
2339 args->uid = attrs->ia_uid;
2341 args->uid = INVALID_UID; /* no change */
2343 if (attrs->ia_valid & ATTR_GID)
2344 args->gid = attrs->ia_gid;
2346 args->gid = INVALID_GID; /* no change */
2348 if (attrs->ia_valid & ATTR_ATIME)
2349 args->atime = cifs_UnixTimeToNT(attrs->ia_atime);
2351 args->atime = NO_CHANGE_64;
2353 if (attrs->ia_valid & ATTR_MTIME)
2354 args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime);
2356 args->mtime = NO_CHANGE_64;
2358 if (attrs->ia_valid & ATTR_CTIME)
2359 args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime);
2361 args->ctime = NO_CHANGE_64;
2364 open_file = find_writable_file(cifsInode, true);
2366 u16 nfid = open_file->fid.netfid;
2367 u32 npid = open_file->pid;
2368 pTcon = tlink_tcon(open_file->tlink);
2369 rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid);
2370 cifsFileInfo_put(open_file);
2372 tlink = cifs_sb_tlink(cifs_sb);
2373 if (IS_ERR(tlink)) {
2374 rc = PTR_ERR(tlink);
2377 pTcon = tlink_tcon(tlink);
2378 rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args,
2380 cifs_remap(cifs_sb));
2381 cifs_put_tlink(tlink);
2387 if ((attrs->ia_valid & ATTR_SIZE) &&
2388 attrs->ia_size != i_size_read(inode))
2389 truncate_setsize(inode, attrs->ia_size);
2391 setattr_copy(inode, attrs);
2392 mark_inode_dirty(inode);
2394 /* force revalidate when any of these times are set since some
2395 of the fs types (eg ext3, fat) do not have fine enough
2396 time granularity to match protocol, and we do not have a
2397 a way (yet) to query the server fs's time granularity (and
2398 whether it rounds times down).
2400 if (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME))
2401 cifsInode->time = 0;
2410 cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
2413 kuid_t uid = INVALID_UID;
2414 kgid_t gid = INVALID_GID;
2415 struct inode *inode = d_inode(direntry);
2416 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2417 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2418 struct cifsFileInfo *wfile;
2419 struct cifs_tcon *tcon;
2420 char *full_path = NULL;
2423 __u64 mode = NO_CHANGE_64;
2427 cifs_dbg(FYI, "setattr on file %pd attrs->ia_valid 0x%x\n",
2428 direntry, attrs->ia_valid);
2430 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
2431 attrs->ia_valid |= ATTR_FORCE;
2433 rc = setattr_prepare(direntry, attrs);
2439 full_path = build_path_from_dentry(direntry);
2440 if (full_path == NULL) {
2447 * Attempt to flush data before changing attributes. We need to do
2448 * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the
2449 * ownership or mode then we may also need to do this. Here, we take
2450 * the safe way out and just do the flush on all setattr requests. If
2451 * the flush returns error, store it to report later and continue.
2453 * BB: This should be smarter. Why bother flushing pages that
2454 * will be truncated anyway? Also, should we error out here if
2455 * the flush returns error?
2457 rc = filemap_write_and_wait(inode->i_mapping);
2458 if (is_interrupt_error(rc)) {
2460 goto cifs_setattr_exit;
2463 mapping_set_error(inode->i_mapping, rc);
2466 if (attrs->ia_valid & ATTR_MTIME) {
2467 rc = cifs_get_writable_file(cifsInode, false, &wfile);
2469 tcon = tlink_tcon(wfile->tlink);
2470 rc = tcon->ses->server->ops->flush(xid, tcon, &wfile->fid);
2471 cifsFileInfo_put(wfile);
2474 } else if (rc != -EBADF)
2480 if (attrs->ia_valid & ATTR_SIZE) {
2481 rc = cifs_set_file_size(inode, attrs, xid, full_path);
2483 goto cifs_setattr_exit;
2486 if (attrs->ia_valid & ATTR_UID)
2487 uid = attrs->ia_uid;
2489 if (attrs->ia_valid & ATTR_GID)
2490 gid = attrs->ia_gid;
2492 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) ||
2493 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) {
2494 if (uid_valid(uid) || gid_valid(gid)) {
2495 rc = id_mode_to_cifs_acl(inode, full_path, NO_CHANGE_64,
2498 cifs_dbg(FYI, "%s: Setting id failed with error: %d\n",
2500 goto cifs_setattr_exit;
2504 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID))
2505 attrs->ia_valid &= ~(ATTR_UID | ATTR_GID);
2507 /* skip mode change if it's just for clearing setuid/setgid */
2508 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
2509 attrs->ia_valid &= ~ATTR_MODE;
2511 if (attrs->ia_valid & ATTR_MODE) {
2512 mode = attrs->ia_mode;
2514 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) ||
2515 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) {
2516 rc = id_mode_to_cifs_acl(inode, full_path, mode,
2517 INVALID_UID, INVALID_GID);
2519 cifs_dbg(FYI, "%s: Setting ACL failed with error: %d\n",
2521 goto cifs_setattr_exit;
2524 if (((mode & S_IWUGO) == 0) &&
2525 (cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
2527 dosattr = cifsInode->cifsAttrs | ATTR_READONLY;
2529 /* fix up mode if we're not using dynperm */
2530 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
2531 attrs->ia_mode = inode->i_mode & ~S_IWUGO;
2532 } else if ((mode & S_IWUGO) &&
2533 (cifsInode->cifsAttrs & ATTR_READONLY)) {
2535 dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
2536 /* Attributes of 0 are ignored */
2538 dosattr |= ATTR_NORMAL;
2540 /* reset local inode permissions to normal */
2541 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2542 attrs->ia_mode &= ~(S_IALLUGO);
2543 if (S_ISDIR(inode->i_mode))
2545 cifs_sb->mnt_dir_mode;
2548 cifs_sb->mnt_file_mode;
2550 } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2551 /* ignore mode change - ATTR_READONLY hasn't changed */
2552 attrs->ia_valid &= ~ATTR_MODE;
2556 if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) ||
2557 ((attrs->ia_valid & ATTR_MODE) && dosattr)) {
2558 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
2559 /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */
2561 /* Even if error on time set, no sense failing the call if
2562 the server would set the time to a reasonable value anyway,
2563 and this check ensures that we are not being called from
2564 sys_utimes in which case we ought to fail the call back to
2565 the user when the server rejects the call */
2566 if ((rc) && (attrs->ia_valid &
2567 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
2571 /* do not need local check to inode_check_ok since the server does
2574 goto cifs_setattr_exit;
2576 if ((attrs->ia_valid & ATTR_SIZE) &&
2577 attrs->ia_size != i_size_read(inode))
2578 truncate_setsize(inode, attrs->ia_size);
2580 setattr_copy(inode, attrs);
2581 mark_inode_dirty(inode);
2590 cifs_setattr(struct dentry *direntry, struct iattr *attrs)
2592 struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
2593 struct cifs_tcon *pTcon = cifs_sb_master_tcon(cifs_sb);
2595 if (pTcon->unix_ext)
2596 return cifs_setattr_unix(direntry, attrs);
2598 return cifs_setattr_nounix(direntry, attrs);
2600 /* BB: add cifs_setattr_legacy for really old servers */
2604 void cifs_delete_inode(struct inode *inode)
2606 cifs_dbg(FYI, "In cifs_delete_inode, inode = 0x%p\n", inode);
2607 /* may have to add back in if and when safe distributed caching of
2608 directories added e.g. via FindNotify */