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) < 0)
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)) {
417 CIFS_I(*pinode)->time = 0; /* force reval */
422 /* if filetype is different, return error */
423 if (unlikely(((*pinode)->i_mode & S_IFMT) !=
424 (fattr.cf_mode & S_IFMT))) {
425 CIFS_I(*pinode)->time = 0; /* force reval */
430 cifs_fattr_to_inode(*pinode, &fattr);
438 cifs_sfu_type(struct cifs_fattr *fattr, const char *path,
439 struct cifs_sb_info *cifs_sb, unsigned int xid)
443 struct tcon_link *tlink;
444 struct cifs_tcon *tcon;
446 struct cifs_open_parms oparms;
447 struct cifs_io_parms io_parms;
449 unsigned int bytes_read;
451 int buf_type = CIFS_NO_BUFFER;
455 fattr->cf_mode &= ~S_IFMT;
457 if (fattr->cf_eof == 0) {
458 fattr->cf_mode |= S_IFIFO;
459 fattr->cf_dtype = DT_FIFO;
461 } else if (fattr->cf_eof < 8) {
462 fattr->cf_mode |= S_IFREG;
463 fattr->cf_dtype = DT_REG;
464 return -EINVAL; /* EOPNOTSUPP? */
467 tlink = cifs_sb_tlink(cifs_sb);
469 return PTR_ERR(tlink);
470 tcon = tlink_tcon(tlink);
473 oparms.cifs_sb = cifs_sb;
474 oparms.desired_access = GENERIC_READ;
475 oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR);
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,
902 cifs_dbg(FYI, "%s: Get mode from SID failed. rc=%d\n",
906 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
907 rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, false,
912 cifs_dbg(FYI, "%s: Getting ACL failed with error: %d\n",
918 /* fill in remaining high mode bits e.g. SUID, VTX */
919 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
920 cifs_sfu_mode(&fattr, full_path, cifs_sb, xid);
922 /* check for Minshall+French symlinks */
923 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
924 tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr,
927 cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc);
931 *inode = cifs_iget(sb, &fattr);
935 /* we already have inode, update it */
937 /* if uniqueid is different, return error */
938 if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM &&
939 CIFS_I(*inode)->uniqueid != fattr.cf_uniqueid)) {
940 CIFS_I(*inode)->time = 0; /* force reval */
945 /* if filetype is different, return error */
946 if (unlikely(((*inode)->i_mode & S_IFMT) !=
947 (fattr.cf_mode & S_IFMT))) {
948 CIFS_I(*inode)->time = 0; /* force reval */
953 cifs_fattr_to_inode(*inode, &fattr);
957 if ((*inode) && ((*inode)->i_ino == 0))
958 cifs_dbg(FYI, "inode number of zero returned\n");
961 cifs_put_tlink(tlink);
965 static const struct inode_operations cifs_ipc_inode_ops = {
966 .lookup = cifs_lookup,
970 cifs_find_inode(struct inode *inode, void *opaque)
972 struct cifs_fattr *fattr = (struct cifs_fattr *) opaque;
974 /* don't match inode with different uniqueid */
975 if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid)
978 /* use createtime like an i_generation field */
979 if (CIFS_I(inode)->createtime != fattr->cf_createtime)
982 /* don't match inode of different type */
983 if ((inode->i_mode & S_IFMT) != (fattr->cf_mode & S_IFMT))
986 /* if it's not a directory or has no dentries, then flag it */
987 if (S_ISDIR(inode->i_mode) && !hlist_empty(&inode->i_dentry))
988 fattr->cf_flags |= CIFS_FATTR_INO_COLLISION;
994 cifs_init_inode(struct inode *inode, void *opaque)
996 struct cifs_fattr *fattr = (struct cifs_fattr *) opaque;
998 CIFS_I(inode)->uniqueid = fattr->cf_uniqueid;
999 CIFS_I(inode)->createtime = fattr->cf_createtime;
1004 * walk dentry list for an inode and report whether it has aliases that
1005 * are hashed. We use this to determine if a directory inode can actually
1009 inode_has_hashed_dentries(struct inode *inode)
1011 struct dentry *dentry;
1013 spin_lock(&inode->i_lock);
1014 hlist_for_each_entry(dentry, &inode->i_dentry, d_u.d_alias) {
1015 if (!d_unhashed(dentry) || IS_ROOT(dentry)) {
1016 spin_unlock(&inode->i_lock);
1020 spin_unlock(&inode->i_lock);
1024 /* Given fattrs, get a corresponding inode */
1026 cifs_iget(struct super_block *sb, struct cifs_fattr *fattr)
1029 struct inode *inode;
1032 cifs_dbg(FYI, "looking for uniqueid=%llu\n", fattr->cf_uniqueid);
1034 /* hash down to 32-bits on 32-bit arch */
1035 hash = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid);
1037 inode = iget5_locked(sb, hash, cifs_find_inode, cifs_init_inode, fattr);
1039 /* was there a potentially problematic inode collision? */
1040 if (fattr->cf_flags & CIFS_FATTR_INO_COLLISION) {
1041 fattr->cf_flags &= ~CIFS_FATTR_INO_COLLISION;
1043 if (inode_has_hashed_dentries(inode)) {
1044 cifs_autodisable_serverino(CIFS_SB(sb));
1046 fattr->cf_uniqueid = iunique(sb, ROOT_I);
1047 goto retry_iget5_locked;
1051 cifs_fattr_to_inode(inode, fattr);
1052 if (sb->s_flags & SB_NOATIME)
1053 inode->i_flags |= S_NOATIME | S_NOCMTIME;
1054 if (inode->i_state & I_NEW) {
1055 inode->i_ino = hash;
1056 #ifdef CONFIG_CIFS_FSCACHE
1057 /* initialize per-inode cache cookie pointer */
1058 CIFS_I(inode)->fscache = NULL;
1060 unlock_new_inode(inode);
1067 /* gets root inode */
1068 struct inode *cifs_root_iget(struct super_block *sb)
1071 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1072 struct inode *inode = NULL;
1074 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
1078 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH)
1079 && cifs_sb->prepath) {
1080 len = strlen(cifs_sb->prepath);
1081 path = kzalloc(len + 2 /* leading sep + null */, GFP_KERNEL);
1083 return ERR_PTR(-ENOMEM);
1085 memcpy(path+1, cifs_sb->prepath, len);
1087 path = kstrdup("", GFP_KERNEL);
1089 return ERR_PTR(-ENOMEM);
1093 if (tcon->unix_ext) {
1094 rc = cifs_get_inode_info_unix(&inode, path, sb, xid);
1095 /* some servers mistakenly claim POSIX support */
1096 if (rc != -EOPNOTSUPP)
1098 cifs_dbg(VFS, "server does not support POSIX extensions");
1099 tcon->unix_ext = false;
1102 convert_delimiter(path, CIFS_DIR_SEP(cifs_sb));
1103 rc = cifs_get_inode_info(&inode, path, NULL, sb, xid, NULL);
1107 inode = ERR_PTR(rc);
1111 #ifdef CONFIG_CIFS_FSCACHE
1112 /* populate tcon->resource_id */
1113 tcon->resource_id = CIFS_I(inode)->uniqueid;
1116 if (rc && tcon->pipe) {
1117 cifs_dbg(FYI, "ipc connection - fake read inode\n");
1118 spin_lock(&inode->i_lock);
1119 inode->i_mode |= S_IFDIR;
1120 set_nlink(inode, 2);
1121 inode->i_op = &cifs_ipc_inode_ops;
1122 inode->i_fop = &simple_dir_operations;
1123 inode->i_uid = cifs_sb->mnt_uid;
1124 inode->i_gid = cifs_sb->mnt_gid;
1125 spin_unlock(&inode->i_lock);
1128 inode = ERR_PTR(rc);
1138 cifs_set_file_info(struct inode *inode, struct iattr *attrs, unsigned int xid,
1139 char *full_path, __u32 dosattr)
1141 bool set_time = false;
1142 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1143 struct TCP_Server_Info *server;
1144 FILE_BASIC_INFO info_buf;
1149 server = cifs_sb_master_tcon(cifs_sb)->ses->server;
1150 if (!server->ops->set_file_info)
1155 if (attrs->ia_valid & ATTR_ATIME) {
1157 info_buf.LastAccessTime =
1158 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1160 info_buf.LastAccessTime = 0;
1162 if (attrs->ia_valid & ATTR_MTIME) {
1164 info_buf.LastWriteTime =
1165 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1167 info_buf.LastWriteTime = 0;
1170 * Samba throws this field away, but windows may actually use it.
1171 * Do not set ctime unless other time stamps are changed explicitly
1172 * (i.e. by utimes()) since we would then have a mix of client and
1175 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1176 cifs_dbg(FYI, "CIFS - CTIME changed\n");
1177 info_buf.ChangeTime =
1178 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1180 info_buf.ChangeTime = 0;
1182 info_buf.CreationTime = 0; /* don't change */
1183 info_buf.Attributes = cpu_to_le32(dosattr);
1185 return server->ops->set_file_info(inode, full_path, &info_buf, xid);
1189 * Open the given file (if it isn't already), set the DELETE_ON_CLOSE bit
1190 * and rename it to a random name that hopefully won't conflict with
1194 cifs_rename_pending_delete(const char *full_path, struct dentry *dentry,
1195 const unsigned int xid)
1199 struct cifs_fid fid;
1200 struct cifs_open_parms oparms;
1201 struct inode *inode = d_inode(dentry);
1202 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1203 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1204 struct tcon_link *tlink;
1205 struct cifs_tcon *tcon;
1206 __u32 dosattr, origattr;
1207 FILE_BASIC_INFO *info_buf = NULL;
1209 tlink = cifs_sb_tlink(cifs_sb);
1211 return PTR_ERR(tlink);
1212 tcon = tlink_tcon(tlink);
1215 * We cannot rename the file if the server doesn't support
1216 * CAP_INFOLEVEL_PASSTHRU
1218 if (!(tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)) {
1224 oparms.cifs_sb = cifs_sb;
1225 oparms.desired_access = DELETE | FILE_WRITE_ATTRIBUTES;
1226 oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR);
1227 oparms.disposition = FILE_OPEN;
1228 oparms.path = full_path;
1230 oparms.reconnect = false;
1232 rc = CIFS_open(xid, &oparms, &oplock, NULL);
1236 origattr = cifsInode->cifsAttrs;
1238 origattr |= ATTR_NORMAL;
1240 dosattr = origattr & ~ATTR_READONLY;
1242 dosattr |= ATTR_NORMAL;
1243 dosattr |= ATTR_HIDDEN;
1245 /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */
1246 if (dosattr != origattr) {
1247 info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL);
1248 if (info_buf == NULL) {
1252 info_buf->Attributes = cpu_to_le32(dosattr);
1253 rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid,
1255 /* although we would like to mark the file hidden
1256 if that fails we will still try to rename it */
1258 cifsInode->cifsAttrs = dosattr;
1260 dosattr = origattr; /* since not able to change them */
1263 /* rename the file */
1264 rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, NULL,
1266 cifs_remap(cifs_sb));
1272 /* try to set DELETE_ON_CLOSE */
1273 if (!test_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags)) {
1274 rc = CIFSSMBSetFileDisposition(xid, tcon, true, fid.netfid,
1277 * some samba versions return -ENOENT when we try to set the
1278 * file disposition here. Likely a samba bug, but work around
1279 * it for now. This means that some cifsXXX files may hang
1280 * around after they shouldn't.
1282 * BB: remove this hack after more servers have the fix
1290 set_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags);
1294 CIFSSMBClose(xid, tcon, fid.netfid);
1297 cifs_put_tlink(tlink);
1301 * reset everything back to the original state. Don't bother
1302 * dealing with errors here since we can't do anything about
1306 CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, dentry->d_name.name,
1307 cifs_sb->local_nls, cifs_remap(cifs_sb));
1309 if (dosattr != origattr) {
1310 info_buf->Attributes = cpu_to_le32(origattr);
1311 if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid,
1313 cifsInode->cifsAttrs = origattr;
1319 /* copied from fs/nfs/dir.c with small changes */
1321 cifs_drop_nlink(struct inode *inode)
1323 spin_lock(&inode->i_lock);
1324 if (inode->i_nlink > 0)
1326 spin_unlock(&inode->i_lock);
1330 * If d_inode(dentry) is null (usually meaning the cached dentry
1331 * is a negative dentry) then we would attempt a standard SMB delete, but
1332 * if that fails we can not attempt the fall back mechanisms on EACCES
1333 * but will return the EACCES to the caller. Note that the VFS does not call
1334 * unlink on negative dentries currently.
1336 int cifs_unlink(struct inode *dir, struct dentry *dentry)
1340 char *full_path = NULL;
1341 struct inode *inode = d_inode(dentry);
1342 struct cifsInodeInfo *cifs_inode;
1343 struct super_block *sb = dir->i_sb;
1344 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1345 struct tcon_link *tlink;
1346 struct cifs_tcon *tcon;
1347 struct TCP_Server_Info *server;
1348 struct iattr *attrs = NULL;
1349 __u32 dosattr = 0, origattr = 0;
1351 cifs_dbg(FYI, "cifs_unlink, dir=0x%p, dentry=0x%p\n", dir, dentry);
1353 tlink = cifs_sb_tlink(cifs_sb);
1355 return PTR_ERR(tlink);
1356 tcon = tlink_tcon(tlink);
1357 server = tcon->ses->server;
1361 /* Unlink can be called from rename so we can not take the
1362 * sb->s_vfs_rename_mutex here */
1363 full_path = build_path_from_dentry(dentry);
1364 if (full_path == NULL) {
1369 if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1370 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1371 rc = CIFSPOSIXDelFile(xid, tcon, full_path,
1372 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
1373 cifs_remap(cifs_sb));
1374 cifs_dbg(FYI, "posix del rc %d\n", rc);
1375 if ((rc == 0) || (rc == -ENOENT))
1376 goto psx_del_no_retry;
1380 if (!server->ops->unlink) {
1382 goto psx_del_no_retry;
1385 rc = server->ops->unlink(xid, tcon, full_path, cifs_sb);
1390 cifs_drop_nlink(inode);
1391 } else if (rc == -ENOENT) {
1393 } else if (rc == -EBUSY) {
1394 if (server->ops->rename_pending_delete) {
1395 rc = server->ops->rename_pending_delete(full_path,
1398 cifs_drop_nlink(inode);
1400 } else if ((rc == -EACCES) && (dosattr == 0) && inode) {
1401 attrs = kzalloc(sizeof(*attrs), GFP_KERNEL);
1402 if (attrs == NULL) {
1407 /* try to reset dos attributes */
1408 cifs_inode = CIFS_I(inode);
1409 origattr = cifs_inode->cifsAttrs;
1411 origattr |= ATTR_NORMAL;
1412 dosattr = origattr & ~ATTR_READONLY;
1414 dosattr |= ATTR_NORMAL;
1415 dosattr |= ATTR_HIDDEN;
1417 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
1421 goto retry_std_delete;
1424 /* undo the setattr if we errored out and it's needed */
1425 if (rc != 0 && dosattr != 0)
1426 cifs_set_file_info(inode, attrs, xid, full_path, origattr);
1430 cifs_inode = CIFS_I(inode);
1431 cifs_inode->time = 0; /* will force revalidate to get info
1433 inode->i_ctime = current_time(inode);
1435 dir->i_ctime = dir->i_mtime = current_time(dir);
1436 cifs_inode = CIFS_I(dir);
1437 CIFS_I(dir)->time = 0; /* force revalidate of dir as well */
1442 cifs_put_tlink(tlink);
1447 cifs_mkdir_qinfo(struct inode *parent, struct dentry *dentry, umode_t mode,
1448 const char *full_path, struct cifs_sb_info *cifs_sb,
1449 struct cifs_tcon *tcon, const unsigned int xid)
1452 struct inode *inode = NULL;
1455 rc = cifs_get_inode_info_unix(&inode, full_path, parent->i_sb,
1458 rc = cifs_get_inode_info(&inode, full_path, NULL, parent->i_sb,
1465 * setting nlink not necessary except in cases where we failed to get it
1466 * from the server or was set bogus. Also, since this is a brand new
1467 * inode, no need to grab the i_lock before setting the i_nlink.
1469 if (inode->i_nlink < 2)
1470 set_nlink(inode, 2);
1471 mode &= ~current_umask();
1472 /* must turn on setgid bit if parent dir has it */
1473 if (parent->i_mode & S_ISGID)
1476 if (tcon->unix_ext) {
1477 struct cifs_unix_set_info_args args = {
1479 .ctime = NO_CHANGE_64,
1480 .atime = NO_CHANGE_64,
1481 .mtime = NO_CHANGE_64,
1484 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1485 args.uid = current_fsuid();
1486 if (parent->i_mode & S_ISGID)
1487 args.gid = parent->i_gid;
1489 args.gid = current_fsgid();
1491 args.uid = INVALID_UID; /* no change */
1492 args.gid = INVALID_GID; /* no change */
1494 CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args,
1496 cifs_remap(cifs_sb));
1498 struct TCP_Server_Info *server = tcon->ses->server;
1499 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
1500 (mode & S_IWUGO) == 0 && server->ops->mkdir_setinfo)
1501 server->ops->mkdir_setinfo(inode, full_path, cifs_sb,
1503 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
1504 inode->i_mode = (mode | S_IFDIR);
1506 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1507 inode->i_uid = current_fsuid();
1508 if (inode->i_mode & S_ISGID)
1509 inode->i_gid = parent->i_gid;
1511 inode->i_gid = current_fsgid();
1514 d_instantiate(dentry, inode);
1519 cifs_posix_mkdir(struct inode *inode, struct dentry *dentry, umode_t mode,
1520 const char *full_path, struct cifs_sb_info *cifs_sb,
1521 struct cifs_tcon *tcon, const unsigned int xid)
1525 FILE_UNIX_BASIC_INFO *info = NULL;
1526 struct inode *newinode = NULL;
1527 struct cifs_fattr fattr;
1529 info = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1532 goto posix_mkdir_out;
1535 mode &= ~current_umask();
1536 rc = CIFSPOSIXCreate(xid, tcon, SMB_O_DIRECTORY | SMB_O_CREAT, mode,
1537 NULL /* netfid */, info, &oplock, full_path,
1538 cifs_sb->local_nls, cifs_remap(cifs_sb));
1539 if (rc == -EOPNOTSUPP)
1540 goto posix_mkdir_out;
1542 cifs_dbg(FYI, "posix mkdir returned 0x%x\n", rc);
1544 goto posix_mkdir_out;
1547 if (info->Type == cpu_to_le32(-1))
1548 /* no return info, go query for it */
1549 goto posix_mkdir_get_info;
1551 * BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if
1552 * need to set uid/gid.
1555 cifs_unix_basic_to_fattr(&fattr, info, cifs_sb);
1556 cifs_fill_uniqueid(inode->i_sb, &fattr);
1557 newinode = cifs_iget(inode->i_sb, &fattr);
1559 goto posix_mkdir_get_info;
1561 d_instantiate(dentry, newinode);
1563 #ifdef CONFIG_CIFS_DEBUG2
1564 cifs_dbg(FYI, "instantiated dentry %p %pd to inode %p\n",
1565 dentry, dentry, newinode);
1567 if (newinode->i_nlink != 2)
1568 cifs_dbg(FYI, "unexpected number of links %d\n",
1575 posix_mkdir_get_info:
1576 rc = cifs_mkdir_qinfo(inode, dentry, mode, full_path, cifs_sb, tcon,
1578 goto posix_mkdir_out;
1581 int cifs_mkdir(struct inode *inode, struct dentry *direntry, umode_t mode)
1585 struct cifs_sb_info *cifs_sb;
1586 struct tcon_link *tlink;
1587 struct cifs_tcon *tcon;
1588 struct TCP_Server_Info *server;
1591 cifs_dbg(FYI, "In cifs_mkdir, mode = %04ho inode = 0x%p\n",
1594 cifs_sb = CIFS_SB(inode->i_sb);
1595 tlink = cifs_sb_tlink(cifs_sb);
1597 return PTR_ERR(tlink);
1598 tcon = tlink_tcon(tlink);
1602 full_path = build_path_from_dentry(direntry);
1603 if (full_path == NULL) {
1608 server = tcon->ses->server;
1610 if ((server->ops->posix_mkdir) && (tcon->posix_extensions)) {
1611 rc = server->ops->posix_mkdir(xid, inode, mode, tcon, full_path,
1613 d_drop(direntry); /* for time being always refresh inode info */
1617 if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1618 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1619 rc = cifs_posix_mkdir(inode, direntry, mode, full_path, cifs_sb,
1621 if (rc != -EOPNOTSUPP)
1625 if (!server->ops->mkdir) {
1630 /* BB add setting the equivalent of mode via CreateX w/ACLs */
1631 rc = server->ops->mkdir(xid, inode, mode, tcon, full_path, cifs_sb);
1633 cifs_dbg(FYI, "cifs_mkdir returned 0x%x\n", rc);
1638 /* TODO: skip this for smb2/smb3 */
1639 rc = cifs_mkdir_qinfo(inode, direntry, mode, full_path, cifs_sb, tcon,
1643 * Force revalidate to get parent dir info when needed since cached
1644 * attributes are invalid now.
1646 CIFS_I(inode)->time = 0;
1649 cifs_put_tlink(tlink);
1653 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1657 struct cifs_sb_info *cifs_sb;
1658 struct tcon_link *tlink;
1659 struct cifs_tcon *tcon;
1660 struct TCP_Server_Info *server;
1661 char *full_path = NULL;
1662 struct cifsInodeInfo *cifsInode;
1664 cifs_dbg(FYI, "cifs_rmdir, inode = 0x%p\n", inode);
1668 full_path = build_path_from_dentry(direntry);
1669 if (full_path == NULL) {
1674 cifs_sb = CIFS_SB(inode->i_sb);
1675 tlink = cifs_sb_tlink(cifs_sb);
1676 if (IS_ERR(tlink)) {
1677 rc = PTR_ERR(tlink);
1680 tcon = tlink_tcon(tlink);
1681 server = tcon->ses->server;
1683 if (!server->ops->rmdir) {
1685 cifs_put_tlink(tlink);
1689 rc = server->ops->rmdir(xid, tcon, full_path, cifs_sb);
1690 cifs_put_tlink(tlink);
1693 spin_lock(&d_inode(direntry)->i_lock);
1694 i_size_write(d_inode(direntry), 0);
1695 clear_nlink(d_inode(direntry));
1696 spin_unlock(&d_inode(direntry)->i_lock);
1699 cifsInode = CIFS_I(d_inode(direntry));
1700 /* force revalidate to go get info when needed */
1701 cifsInode->time = 0;
1703 cifsInode = CIFS_I(inode);
1705 * Force revalidate to get parent dir info when needed since cached
1706 * attributes are invalid now.
1708 cifsInode->time = 0;
1710 d_inode(direntry)->i_ctime = inode->i_ctime = inode->i_mtime =
1711 current_time(inode);
1720 cifs_do_rename(const unsigned int xid, struct dentry *from_dentry,
1721 const char *from_path, struct dentry *to_dentry,
1722 const char *to_path)
1724 struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb);
1725 struct tcon_link *tlink;
1726 struct cifs_tcon *tcon;
1727 struct TCP_Server_Info *server;
1728 struct cifs_fid fid;
1729 struct cifs_open_parms oparms;
1732 tlink = cifs_sb_tlink(cifs_sb);
1734 return PTR_ERR(tlink);
1735 tcon = tlink_tcon(tlink);
1736 server = tcon->ses->server;
1738 if (!server->ops->rename)
1741 /* try path-based rename first */
1742 rc = server->ops->rename(xid, tcon, from_path, to_path, cifs_sb);
1745 * Don't bother with rename by filehandle unless file is busy and
1746 * source. Note that cross directory moves do not work with
1747 * rename by filehandle to various Windows servers.
1749 if (rc == 0 || rc != -EBUSY)
1750 goto do_rename_exit;
1752 /* Don't fall back to using SMB on SMB 2+ mount */
1753 if (server->vals->protocol_id != 0)
1754 goto do_rename_exit;
1756 /* open-file renames don't work across directories */
1757 if (to_dentry->d_parent != from_dentry->d_parent)
1758 goto do_rename_exit;
1761 oparms.cifs_sb = cifs_sb;
1762 /* open the file to be renamed -- we need DELETE perms */
1763 oparms.desired_access = DELETE;
1764 oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR);
1765 oparms.disposition = FILE_OPEN;
1766 oparms.path = from_path;
1768 oparms.reconnect = false;
1770 rc = CIFS_open(xid, &oparms, &oplock, NULL);
1772 rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid,
1773 (const char *) to_dentry->d_name.name,
1774 cifs_sb->local_nls, cifs_remap(cifs_sb));
1775 CIFSSMBClose(xid, tcon, fid.netfid);
1778 cifs_put_tlink(tlink);
1783 cifs_rename2(struct inode *source_dir, struct dentry *source_dentry,
1784 struct inode *target_dir, struct dentry *target_dentry,
1787 char *from_name = NULL;
1788 char *to_name = NULL;
1789 struct cifs_sb_info *cifs_sb;
1790 struct tcon_link *tlink;
1791 struct cifs_tcon *tcon;
1792 FILE_UNIX_BASIC_INFO *info_buf_source = NULL;
1793 FILE_UNIX_BASIC_INFO *info_buf_target;
1797 if (flags & ~RENAME_NOREPLACE)
1800 cifs_sb = CIFS_SB(source_dir->i_sb);
1801 tlink = cifs_sb_tlink(cifs_sb);
1803 return PTR_ERR(tlink);
1804 tcon = tlink_tcon(tlink);
1809 * we already have the rename sem so we do not need to
1810 * grab it again here to protect the path integrity
1812 from_name = build_path_from_dentry(source_dentry);
1813 if (from_name == NULL) {
1815 goto cifs_rename_exit;
1818 to_name = build_path_from_dentry(target_dentry);
1819 if (to_name == NULL) {
1821 goto cifs_rename_exit;
1824 rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry,
1828 * No-replace is the natural behavior for CIFS, so skip unlink hacks.
1830 if (flags & RENAME_NOREPLACE)
1831 goto cifs_rename_exit;
1833 if (rc == -EEXIST && tcon->unix_ext) {
1835 * Are src and dst hardlinks of same inode? We can only tell
1836 * with unix extensions enabled.
1839 kmalloc_array(2, sizeof(FILE_UNIX_BASIC_INFO),
1841 if (info_buf_source == NULL) {
1843 goto cifs_rename_exit;
1846 info_buf_target = info_buf_source + 1;
1847 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, from_name,
1850 cifs_remap(cifs_sb));
1854 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, to_name,
1857 cifs_remap(cifs_sb));
1859 if (tmprc == 0 && (info_buf_source->UniqueId ==
1860 info_buf_target->UniqueId)) {
1861 /* same file, POSIX says that this is a noop */
1863 goto cifs_rename_exit;
1867 * else ... BB we could add the same check for Windows by
1868 * checking the UniqueId via FILE_INTERNAL_INFO
1872 /* Try unlinking the target dentry if it's not negative */
1873 if (d_really_is_positive(target_dentry) && (rc == -EACCES || rc == -EEXIST)) {
1874 if (d_is_dir(target_dentry))
1875 tmprc = cifs_rmdir(target_dir, target_dentry);
1877 tmprc = cifs_unlink(target_dir, target_dentry);
1879 goto cifs_rename_exit;
1880 rc = cifs_do_rename(xid, source_dentry, from_name,
1881 target_dentry, to_name);
1884 /* force revalidate to go get info when needed */
1885 CIFS_I(source_dir)->time = CIFS_I(target_dir)->time = 0;
1887 source_dir->i_ctime = source_dir->i_mtime = target_dir->i_ctime =
1888 target_dir->i_mtime = current_time(source_dir);
1891 kfree(info_buf_source);
1895 cifs_put_tlink(tlink);
1900 cifs_inode_needs_reval(struct inode *inode)
1902 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
1903 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1905 if (cifs_i->time == 0)
1908 if (CIFS_CACHE_READ(cifs_i))
1911 if (!lookupCacheEnabled)
1914 if (!cifs_sb->actimeo)
1917 if (!time_in_range(jiffies, cifs_i->time,
1918 cifs_i->time + cifs_sb->actimeo))
1921 /* hardlinked files w/ noserverino get "special" treatment */
1922 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) &&
1923 S_ISREG(inode->i_mode) && inode->i_nlink != 1)
1930 * Zap the cache. Called when invalid_mapping flag is set.
1933 cifs_invalidate_mapping(struct inode *inode)
1937 if (inode->i_mapping && inode->i_mapping->nrpages != 0) {
1938 rc = invalidate_inode_pages2(inode->i_mapping);
1940 cifs_dbg(VFS, "%s: could not invalidate inode %p\n",
1944 cifs_fscache_reset_inode_cookie(inode);
1949 * cifs_wait_bit_killable - helper for functions that are sleeping on bit locks
1950 * @word: long word containing the bit lock
1953 cifs_wait_bit_killable(struct wait_bit_key *key, int mode)
1955 freezable_schedule_unsafe();
1956 if (signal_pending_state(mode, current))
1957 return -ERESTARTSYS;
1962 cifs_revalidate_mapping(struct inode *inode)
1965 unsigned long *flags = &CIFS_I(inode)->flags;
1967 rc = wait_on_bit_lock_action(flags, CIFS_INO_LOCK, cifs_wait_bit_killable,
1972 if (test_and_clear_bit(CIFS_INO_INVALID_MAPPING, flags)) {
1973 rc = cifs_invalidate_mapping(inode);
1975 set_bit(CIFS_INO_INVALID_MAPPING, flags);
1978 clear_bit_unlock(CIFS_INO_LOCK, flags);
1979 smp_mb__after_atomic();
1980 wake_up_bit(flags, CIFS_INO_LOCK);
1986 cifs_zap_mapping(struct inode *inode)
1988 set_bit(CIFS_INO_INVALID_MAPPING, &CIFS_I(inode)->flags);
1989 return cifs_revalidate_mapping(inode);
1992 int cifs_revalidate_file_attr(struct file *filp)
1995 struct inode *inode = file_inode(filp);
1996 struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data;
1998 if (!cifs_inode_needs_reval(inode))
2001 if (tlink_tcon(cfile->tlink)->unix_ext)
2002 rc = cifs_get_file_info_unix(filp);
2004 rc = cifs_get_file_info(filp);
2009 int cifs_revalidate_dentry_attr(struct dentry *dentry)
2013 struct inode *inode = d_inode(dentry);
2014 struct super_block *sb = dentry->d_sb;
2015 char *full_path = NULL;
2021 if (!cifs_inode_needs_reval(inode))
2026 /* can not safely grab the rename sem here if rename calls revalidate
2027 since that would deadlock */
2028 full_path = build_path_from_dentry(dentry);
2029 if (full_path == NULL) {
2034 cifs_dbg(FYI, "Update attributes: %s inode 0x%p count %d dentry: 0x%p d_time %ld jiffies %ld\n",
2035 full_path, inode, inode->i_count.counter,
2036 dentry, cifs_get_time(dentry), jiffies);
2039 if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext)
2040 rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid);
2042 rc = cifs_get_inode_info(&inode, full_path, NULL, sb,
2044 if (rc == -EAGAIN && count++ < 10)
2053 int cifs_revalidate_file(struct file *filp)
2056 struct inode *inode = file_inode(filp);
2058 rc = cifs_revalidate_file_attr(filp);
2062 return cifs_revalidate_mapping(inode);
2065 /* revalidate a dentry's inode attributes */
2066 int cifs_revalidate_dentry(struct dentry *dentry)
2069 struct inode *inode = d_inode(dentry);
2071 rc = cifs_revalidate_dentry_attr(dentry);
2075 return cifs_revalidate_mapping(inode);
2078 int cifs_getattr(const struct path *path, struct kstat *stat,
2079 u32 request_mask, unsigned int flags)
2081 struct dentry *dentry = path->dentry;
2082 struct cifs_sb_info *cifs_sb = CIFS_SB(dentry->d_sb);
2083 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
2084 struct inode *inode = d_inode(dentry);
2088 * We need to be sure that all dirty pages are written and the server
2089 * has actual ctime, mtime and file length.
2091 if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
2092 inode->i_mapping->nrpages != 0) {
2093 rc = filemap_fdatawait(inode->i_mapping);
2095 mapping_set_error(inode->i_mapping, rc);
2100 rc = cifs_revalidate_dentry_attr(dentry);
2104 generic_fillattr(inode, stat);
2105 stat->blksize = cifs_sb->bsize;
2106 stat->ino = CIFS_I(inode)->uniqueid;
2108 /* old CIFS Unix Extensions doesn't return create time */
2109 if (CIFS_I(inode)->createtime) {
2110 stat->result_mask |= STATX_BTIME;
2112 cifs_NTtimeToUnix(cpu_to_le64(CIFS_I(inode)->createtime));
2115 stat->attributes_mask |= (STATX_ATTR_COMPRESSED | STATX_ATTR_ENCRYPTED);
2116 if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_COMPRESSED)
2117 stat->attributes |= STATX_ATTR_COMPRESSED;
2118 if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_ENCRYPTED)
2119 stat->attributes |= STATX_ATTR_ENCRYPTED;
2122 * If on a multiuser mount without unix extensions or cifsacl being
2123 * enabled, and the admin hasn't overridden them, set the ownership
2124 * to the fsuid/fsgid of the current process.
2126 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) &&
2127 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
2129 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID))
2130 stat->uid = current_fsuid();
2131 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID))
2132 stat->gid = current_fsgid();
2137 int cifs_fiemap(struct inode *inode, struct fiemap_extent_info *fei, u64 start,
2140 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2141 struct cifs_sb_info *cifs_sb = CIFS_SB(cifs_i->vfs_inode.i_sb);
2142 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
2143 struct TCP_Server_Info *server = tcon->ses->server;
2144 struct cifsFileInfo *cfile;
2148 * We need to be sure that all dirty pages are written as they
2149 * might fill holes on the server.
2151 if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
2152 inode->i_mapping->nrpages != 0) {
2153 rc = filemap_fdatawait(inode->i_mapping);
2155 mapping_set_error(inode->i_mapping, rc);
2160 cfile = find_readable_file(cifs_i, false);
2164 if (server->ops->fiemap) {
2165 rc = server->ops->fiemap(tcon, cfile, fei, start, len);
2166 cifsFileInfo_put(cfile);
2170 cifsFileInfo_put(cfile);
2174 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
2176 pgoff_t index = from >> PAGE_SHIFT;
2177 unsigned offset = from & (PAGE_SIZE - 1);
2181 page = grab_cache_page(mapping, index);
2185 zero_user_segment(page, offset, PAGE_SIZE);
2191 static void cifs_setsize(struct inode *inode, loff_t offset)
2193 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2195 spin_lock(&inode->i_lock);
2196 i_size_write(inode, offset);
2197 spin_unlock(&inode->i_lock);
2199 /* Cached inode must be refreshed on truncate */
2201 truncate_pagecache(inode, offset);
2205 cifs_set_file_size(struct inode *inode, struct iattr *attrs,
2206 unsigned int xid, char *full_path)
2209 struct cifsFileInfo *open_file;
2210 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2211 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2212 struct tcon_link *tlink = NULL;
2213 struct cifs_tcon *tcon = NULL;
2214 struct TCP_Server_Info *server;
2217 * To avoid spurious oplock breaks from server, in the case of
2218 * inodes that we already have open, avoid doing path based
2219 * setting of file size if we can do it by handle.
2220 * This keeps our caching token (oplock) and avoids timeouts
2221 * when the local oplock break takes longer to flush
2222 * writebehind data than the SMB timeout for the SetPathInfo
2223 * request would allow
2225 open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY);
2227 tcon = tlink_tcon(open_file->tlink);
2228 server = tcon->ses->server;
2229 if (server->ops->set_file_size)
2230 rc = server->ops->set_file_size(xid, tcon, open_file,
2231 attrs->ia_size, false);
2234 cifsFileInfo_put(open_file);
2235 cifs_dbg(FYI, "SetFSize for attrs rc = %d\n", rc);
2243 tlink = cifs_sb_tlink(cifs_sb);
2245 return PTR_ERR(tlink);
2246 tcon = tlink_tcon(tlink);
2247 server = tcon->ses->server;
2251 * Set file size by pathname rather than by handle either because no
2252 * valid, writeable file handle for it was found or because there was
2253 * an error setting it by handle.
2255 if (server->ops->set_path_size)
2256 rc = server->ops->set_path_size(xid, tcon, full_path,
2257 attrs->ia_size, cifs_sb, false);
2260 cifs_dbg(FYI, "SetEOF by path (setattrs) rc = %d\n", rc);
2263 cifs_put_tlink(tlink);
2267 cifsInode->server_eof = attrs->ia_size;
2268 cifs_setsize(inode, attrs->ia_size);
2271 * The man page of truncate says if the size changed,
2272 * then the st_ctime and st_mtime fields for the file
2275 attrs->ia_ctime = attrs->ia_mtime = current_time(inode);
2276 attrs->ia_valid |= ATTR_CTIME | ATTR_MTIME;
2278 cifs_truncate_page(inode->i_mapping, inode->i_size);
2285 cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
2289 char *full_path = NULL;
2290 struct inode *inode = d_inode(direntry);
2291 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2292 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2293 struct tcon_link *tlink;
2294 struct cifs_tcon *pTcon;
2295 struct cifs_unix_set_info_args *args = NULL;
2296 struct cifsFileInfo *open_file;
2298 cifs_dbg(FYI, "setattr_unix on file %pd attrs->ia_valid=0x%x\n",
2299 direntry, attrs->ia_valid);
2303 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
2304 attrs->ia_valid |= ATTR_FORCE;
2306 rc = setattr_prepare(direntry, attrs);
2310 full_path = build_path_from_dentry(direntry);
2311 if (full_path == NULL) {
2317 * Attempt to flush data before changing attributes. We need to do
2318 * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the
2319 * ownership or mode then we may also need to do this. Here, we take
2320 * the safe way out and just do the flush on all setattr requests. If
2321 * the flush returns error, store it to report later and continue.
2323 * BB: This should be smarter. Why bother flushing pages that
2324 * will be truncated anyway? Also, should we error out here if
2325 * the flush returns error?
2327 rc = filemap_write_and_wait(inode->i_mapping);
2328 if (is_interrupt_error(rc)) {
2333 mapping_set_error(inode->i_mapping, rc);
2336 if (attrs->ia_valid & ATTR_SIZE) {
2337 rc = cifs_set_file_size(inode, attrs, xid, full_path);
2342 /* skip mode change if it's just for clearing setuid/setgid */
2343 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
2344 attrs->ia_valid &= ~ATTR_MODE;
2346 args = kmalloc(sizeof(*args), GFP_KERNEL);
2352 /* set up the struct */
2353 if (attrs->ia_valid & ATTR_MODE)
2354 args->mode = attrs->ia_mode;
2356 args->mode = NO_CHANGE_64;
2358 if (attrs->ia_valid & ATTR_UID)
2359 args->uid = attrs->ia_uid;
2361 args->uid = INVALID_UID; /* no change */
2363 if (attrs->ia_valid & ATTR_GID)
2364 args->gid = attrs->ia_gid;
2366 args->gid = INVALID_GID; /* no change */
2368 if (attrs->ia_valid & ATTR_ATIME)
2369 args->atime = cifs_UnixTimeToNT(attrs->ia_atime);
2371 args->atime = NO_CHANGE_64;
2373 if (attrs->ia_valid & ATTR_MTIME)
2374 args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime);
2376 args->mtime = NO_CHANGE_64;
2378 if (attrs->ia_valid & ATTR_CTIME)
2379 args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime);
2381 args->ctime = NO_CHANGE_64;
2384 open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY);
2386 u16 nfid = open_file->fid.netfid;
2387 u32 npid = open_file->pid;
2388 pTcon = tlink_tcon(open_file->tlink);
2389 rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid);
2390 cifsFileInfo_put(open_file);
2392 tlink = cifs_sb_tlink(cifs_sb);
2393 if (IS_ERR(tlink)) {
2394 rc = PTR_ERR(tlink);
2397 pTcon = tlink_tcon(tlink);
2398 rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args,
2400 cifs_remap(cifs_sb));
2401 cifs_put_tlink(tlink);
2407 if ((attrs->ia_valid & ATTR_SIZE) &&
2408 attrs->ia_size != i_size_read(inode))
2409 truncate_setsize(inode, attrs->ia_size);
2411 setattr_copy(inode, attrs);
2412 mark_inode_dirty(inode);
2414 /* force revalidate when any of these times are set since some
2415 of the fs types (eg ext3, fat) do not have fine enough
2416 time granularity to match protocol, and we do not have a
2417 a way (yet) to query the server fs's time granularity (and
2418 whether it rounds times down).
2420 if (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME))
2421 cifsInode->time = 0;
2430 cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
2433 kuid_t uid = INVALID_UID;
2434 kgid_t gid = INVALID_GID;
2435 struct inode *inode = d_inode(direntry);
2436 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2437 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2438 struct cifsFileInfo *wfile;
2439 struct cifs_tcon *tcon;
2440 char *full_path = NULL;
2443 __u64 mode = NO_CHANGE_64;
2447 cifs_dbg(FYI, "setattr on file %pd attrs->ia_valid 0x%x\n",
2448 direntry, attrs->ia_valid);
2450 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
2451 attrs->ia_valid |= ATTR_FORCE;
2453 rc = setattr_prepare(direntry, attrs);
2459 full_path = build_path_from_dentry(direntry);
2460 if (full_path == NULL) {
2467 * Attempt to flush data before changing attributes. We need to do
2468 * this for ATTR_SIZE and ATTR_MTIME. If the flush of the data
2469 * returns error, store it to report later and continue.
2471 * BB: This should be smarter. Why bother flushing pages that
2472 * will be truncated anyway? Also, should we error out here if
2473 * the flush returns error? Do we need to check for ATTR_MTIME_SET flag?
2475 if (attrs->ia_valid & (ATTR_MTIME | ATTR_SIZE | ATTR_CTIME)) {
2476 rc = filemap_write_and_wait(inode->i_mapping);
2477 if (is_interrupt_error(rc)) {
2479 goto cifs_setattr_exit;
2481 mapping_set_error(inode->i_mapping, rc);
2486 if ((attrs->ia_valid & ATTR_MTIME) &&
2487 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) {
2488 rc = cifs_get_writable_file(cifsInode, FIND_WR_ANY, &wfile);
2490 tcon = tlink_tcon(wfile->tlink);
2491 rc = tcon->ses->server->ops->flush(xid, tcon, &wfile->fid);
2492 cifsFileInfo_put(wfile);
2494 goto cifs_setattr_exit;
2495 } else if (rc != -EBADF)
2496 goto cifs_setattr_exit;
2501 if (attrs->ia_valid & ATTR_SIZE) {
2502 rc = cifs_set_file_size(inode, attrs, xid, full_path);
2504 goto cifs_setattr_exit;
2507 if (attrs->ia_valid & ATTR_UID)
2508 uid = attrs->ia_uid;
2510 if (attrs->ia_valid & ATTR_GID)
2511 gid = attrs->ia_gid;
2513 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) ||
2514 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) {
2515 if (uid_valid(uid) || gid_valid(gid)) {
2516 rc = id_mode_to_cifs_acl(inode, full_path, NO_CHANGE_64,
2519 cifs_dbg(FYI, "%s: Setting id failed with error: %d\n",
2521 goto cifs_setattr_exit;
2525 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID))
2526 attrs->ia_valid &= ~(ATTR_UID | ATTR_GID);
2528 /* skip mode change if it's just for clearing setuid/setgid */
2529 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
2530 attrs->ia_valid &= ~ATTR_MODE;
2532 if (attrs->ia_valid & ATTR_MODE) {
2533 mode = attrs->ia_mode;
2535 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) ||
2536 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) {
2537 rc = id_mode_to_cifs_acl(inode, full_path, mode,
2538 INVALID_UID, INVALID_GID);
2540 cifs_dbg(FYI, "%s: Setting ACL failed with error: %d\n",
2542 goto cifs_setattr_exit;
2545 if (((mode & S_IWUGO) == 0) &&
2546 (cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
2548 dosattr = cifsInode->cifsAttrs | ATTR_READONLY;
2550 /* fix up mode if we're not using dynperm */
2551 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
2552 attrs->ia_mode = inode->i_mode & ~S_IWUGO;
2553 } else if ((mode & S_IWUGO) &&
2554 (cifsInode->cifsAttrs & ATTR_READONLY)) {
2556 dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
2557 /* Attributes of 0 are ignored */
2559 dosattr |= ATTR_NORMAL;
2561 /* reset local inode permissions to normal */
2562 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2563 attrs->ia_mode &= ~(S_IALLUGO);
2564 if (S_ISDIR(inode->i_mode))
2566 cifs_sb->mnt_dir_mode;
2569 cifs_sb->mnt_file_mode;
2571 } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2572 /* ignore mode change - ATTR_READONLY hasn't changed */
2573 attrs->ia_valid &= ~ATTR_MODE;
2577 if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) ||
2578 ((attrs->ia_valid & ATTR_MODE) && dosattr)) {
2579 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
2580 /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */
2582 /* Even if error on time set, no sense failing the call if
2583 the server would set the time to a reasonable value anyway,
2584 and this check ensures that we are not being called from
2585 sys_utimes in which case we ought to fail the call back to
2586 the user when the server rejects the call */
2587 if ((rc) && (attrs->ia_valid &
2588 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
2592 /* do not need local check to inode_check_ok since the server does
2595 goto cifs_setattr_exit;
2597 if ((attrs->ia_valid & ATTR_SIZE) &&
2598 attrs->ia_size != i_size_read(inode))
2599 truncate_setsize(inode, attrs->ia_size);
2601 setattr_copy(inode, attrs);
2602 mark_inode_dirty(inode);
2611 cifs_setattr(struct dentry *direntry, struct iattr *attrs)
2613 struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
2614 struct cifs_tcon *pTcon = cifs_sb_master_tcon(cifs_sb);
2615 int rc, retries = 0;
2618 if (pTcon->unix_ext)
2619 rc = cifs_setattr_unix(direntry, attrs);
2621 rc = cifs_setattr_nounix(direntry, attrs);
2623 } while (is_retryable_error(rc) && retries < 2);
2625 /* BB: add cifs_setattr_legacy for really old servers */
2630 void cifs_delete_inode(struct inode *inode)
2632 cifs_dbg(FYI, "In cifs_delete_inode, inode = 0x%p\n", inode);
2633 /* may have to add back in if and when safe distributed caching of
2634 directories added e.g. via FindNotify */