4 * Copyright (C) International Business Machines Corp., 2002,2010
7 * This library is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU Lesser General Public License as published
9 * by the Free Software Foundation; either version 2.1 of the License, or
10 * (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
15 * the GNU Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public License
18 * along with this library; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include <linux/stat.h>
23 #include <linux/slab.h>
24 #include <linux/pagemap.h>
25 #include <linux/freezer.h>
26 #include <linux/sched/signal.h>
27 #include <linux/wait_bit.h>
29 #include <asm/div64.h>
33 #include "cifsproto.h"
34 #include "cifs_debug.h"
35 #include "cifs_fs_sb.h"
36 #include "cifs_unicode.h"
40 static void cifs_set_ops(struct inode *inode)
42 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
44 switch (inode->i_mode & S_IFMT) {
46 inode->i_op = &cifs_file_inode_ops;
47 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
48 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
49 inode->i_fop = &cifs_file_direct_nobrl_ops;
51 inode->i_fop = &cifs_file_direct_ops;
52 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) {
53 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
54 inode->i_fop = &cifs_file_strict_nobrl_ops;
56 inode->i_fop = &cifs_file_strict_ops;
57 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
58 inode->i_fop = &cifs_file_nobrl_ops;
59 else { /* not direct, send byte range locks */
60 inode->i_fop = &cifs_file_ops;
63 /* check if server can support readpages */
64 if (cifs_sb_master_tcon(cifs_sb)->ses->server->maxBuf <
65 PAGE_SIZE + MAX_CIFS_HDR_SIZE)
66 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
68 inode->i_data.a_ops = &cifs_addr_ops;
71 #ifdef CONFIG_CIFS_DFS_UPCALL
72 if (IS_AUTOMOUNT(inode)) {
73 inode->i_op = &cifs_dfs_referral_inode_operations;
75 #else /* NO DFS support, treat as a directory */
78 inode->i_op = &cifs_dir_inode_ops;
79 inode->i_fop = &cifs_dir_ops;
83 inode->i_op = &cifs_symlink_inode_ops;
86 init_special_inode(inode, inode->i_mode, inode->i_rdev);
91 /* check inode attributes against fattr. If they don't match, tag the
92 * inode for cache invalidation
95 cifs_revalidate_cache(struct inode *inode, struct cifs_fattr *fattr)
97 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
99 cifs_dbg(FYI, "%s: revalidating inode %llu\n",
100 __func__, cifs_i->uniqueid);
102 if (inode->i_state & I_NEW) {
103 cifs_dbg(FYI, "%s: inode %llu is new\n",
104 __func__, cifs_i->uniqueid);
108 /* don't bother with revalidation if we have an oplock */
109 if (CIFS_CACHE_READ(cifs_i)) {
110 cifs_dbg(FYI, "%s: inode %llu is oplocked\n",
111 __func__, cifs_i->uniqueid);
115 /* revalidate if mtime or size have changed */
116 if (timespec64_equal(&inode->i_mtime, &fattr->cf_mtime) &&
117 cifs_i->server_eof == fattr->cf_eof) {
118 cifs_dbg(FYI, "%s: inode %llu is unchanged\n",
119 __func__, cifs_i->uniqueid);
123 cifs_dbg(FYI, "%s: invalidating inode %llu mapping\n",
124 __func__, cifs_i->uniqueid);
125 set_bit(CIFS_INO_INVALID_MAPPING, &cifs_i->flags);
129 * copy nlink to the inode, unless it wasn't provided. Provide
130 * sane values if we don't have an existing one and none was provided
133 cifs_nlink_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr)
136 * if we're in a situation where we can't trust what we
137 * got from the server (readdir, some non-unix cases)
138 * fake reasonable values
140 if (fattr->cf_flags & CIFS_FATTR_UNKNOWN_NLINK) {
141 /* only provide fake values on a new inode */
142 if (inode->i_state & I_NEW) {
143 if (fattr->cf_cifsattrs & ATTR_DIRECTORY)
151 /* we trust the server, so update it */
152 set_nlink(inode, fattr->cf_nlink);
155 /* populate an inode with info from a cifs_fattr struct */
157 cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr)
159 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
160 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
162 cifs_revalidate_cache(inode, fattr);
164 spin_lock(&inode->i_lock);
165 /* we do not want atime to be less than mtime, it broke some apps */
166 if (timespec64_compare(&fattr->cf_atime, &fattr->cf_mtime))
167 inode->i_atime = fattr->cf_mtime;
169 inode->i_atime = fattr->cf_atime;
170 inode->i_mtime = fattr->cf_mtime;
171 inode->i_ctime = fattr->cf_ctime;
172 inode->i_rdev = fattr->cf_rdev;
173 cifs_nlink_fattr_to_inode(inode, fattr);
174 inode->i_uid = fattr->cf_uid;
175 inode->i_gid = fattr->cf_gid;
177 /* if dynperm is set, don't clobber existing mode */
178 if (inode->i_state & I_NEW ||
179 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM))
180 inode->i_mode = fattr->cf_mode;
182 cifs_i->cifsAttrs = fattr->cf_cifsattrs;
184 if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL)
187 cifs_i->time = jiffies;
189 if (fattr->cf_flags & CIFS_FATTR_DELETE_PENDING)
190 set_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags);
192 clear_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags);
194 cifs_i->server_eof = fattr->cf_eof;
196 * Can't safely change the file size here if the client is writing to
197 * it due to potential races.
199 if (is_size_safe_to_change(cifs_i, fattr->cf_eof)) {
200 i_size_write(inode, fattr->cf_eof);
203 * i_blocks is not related to (i_size / i_blksize),
204 * but instead 512 byte (2**9) size is required for
205 * calculating num blocks.
207 inode->i_blocks = (512 - 1 + fattr->cf_bytes) >> 9;
209 spin_unlock(&inode->i_lock);
211 if (fattr->cf_flags & CIFS_FATTR_DFS_REFERRAL)
212 inode->i_flags |= S_AUTOMOUNT;
213 if (inode->i_state & I_NEW)
218 cifs_fill_uniqueid(struct super_block *sb, struct cifs_fattr *fattr)
220 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
222 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
225 fattr->cf_uniqueid = iunique(sb, ROOT_I);
228 /* Fill a cifs_fattr struct with info from FILE_UNIX_BASIC_INFO. */
230 cifs_unix_basic_to_fattr(struct cifs_fattr *fattr, FILE_UNIX_BASIC_INFO *info,
231 struct cifs_sb_info *cifs_sb)
233 memset(fattr, 0, sizeof(*fattr));
234 fattr->cf_uniqueid = le64_to_cpu(info->UniqueId);
235 fattr->cf_bytes = le64_to_cpu(info->NumOfBytes);
236 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
238 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
239 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastModificationTime);
240 fattr->cf_ctime = cifs_NTtimeToUnix(info->LastStatusChange);
241 /* old POSIX extensions don't get create time */
243 fattr->cf_mode = le64_to_cpu(info->Permissions);
246 * Since we set the inode type below we need to mask off
247 * to avoid strange results if bits set above.
249 fattr->cf_mode &= ~S_IFMT;
250 switch (le32_to_cpu(info->Type)) {
252 fattr->cf_mode |= S_IFREG;
253 fattr->cf_dtype = DT_REG;
256 fattr->cf_mode |= S_IFLNK;
257 fattr->cf_dtype = DT_LNK;
260 fattr->cf_mode |= S_IFDIR;
261 fattr->cf_dtype = DT_DIR;
264 fattr->cf_mode |= S_IFCHR;
265 fattr->cf_dtype = DT_CHR;
266 fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor),
267 le64_to_cpu(info->DevMinor) & MINORMASK);
270 fattr->cf_mode |= S_IFBLK;
271 fattr->cf_dtype = DT_BLK;
272 fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor),
273 le64_to_cpu(info->DevMinor) & MINORMASK);
276 fattr->cf_mode |= S_IFIFO;
277 fattr->cf_dtype = DT_FIFO;
280 fattr->cf_mode |= S_IFSOCK;
281 fattr->cf_dtype = DT_SOCK;
284 /* safest to call it a file if we do not know */
285 fattr->cf_mode |= S_IFREG;
286 fattr->cf_dtype = DT_REG;
287 cifs_dbg(FYI, "unknown type %d\n", le32_to_cpu(info->Type));
291 fattr->cf_uid = cifs_sb->mnt_uid;
292 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)) {
293 u64 id = le64_to_cpu(info->Uid);
294 if (id < ((uid_t)-1)) {
295 kuid_t uid = make_kuid(&init_user_ns, id);
301 fattr->cf_gid = cifs_sb->mnt_gid;
302 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)) {
303 u64 id = le64_to_cpu(info->Gid);
304 if (id < ((gid_t)-1)) {
305 kgid_t gid = make_kgid(&init_user_ns, id);
311 fattr->cf_nlink = le64_to_cpu(info->Nlinks);
315 * Fill a cifs_fattr struct with fake inode info.
317 * Needed to setup cifs_fattr data for the directory which is the
318 * junction to the new submount (ie to setup the fake directory
319 * which represents a DFS referral).
322 cifs_create_dfs_fattr(struct cifs_fattr *fattr, struct super_block *sb)
324 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
326 cifs_dbg(FYI, "creating fake fattr for DFS referral\n");
328 memset(fattr, 0, sizeof(*fattr));
329 fattr->cf_mode = S_IFDIR | S_IXUGO | S_IRWXU;
330 fattr->cf_uid = cifs_sb->mnt_uid;
331 fattr->cf_gid = cifs_sb->mnt_gid;
332 ktime_get_real_ts64(&fattr->cf_mtime);
333 fattr->cf_mtime = timespec64_trunc(fattr->cf_mtime, sb->s_time_gran);
334 fattr->cf_atime = fattr->cf_ctime = fattr->cf_mtime;
336 fattr->cf_flags = CIFS_FATTR_DFS_REFERRAL;
340 cifs_get_file_info_unix(struct file *filp)
344 FILE_UNIX_BASIC_INFO find_data;
345 struct cifs_fattr fattr;
346 struct inode *inode = file_inode(filp);
347 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
348 struct cifsFileInfo *cfile = filp->private_data;
349 struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
352 rc = CIFSSMBUnixQFileInfo(xid, tcon, cfile->fid.netfid, &find_data);
354 cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb);
355 } else if (rc == -EREMOTE) {
356 cifs_create_dfs_fattr(&fattr, inode->i_sb);
360 cifs_fattr_to_inode(inode, &fattr);
365 int cifs_get_inode_info_unix(struct inode **pinode,
366 const unsigned char *full_path,
367 struct super_block *sb, unsigned int xid)
370 FILE_UNIX_BASIC_INFO find_data;
371 struct cifs_fattr fattr;
372 struct cifs_tcon *tcon;
373 struct tcon_link *tlink;
374 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
376 cifs_dbg(FYI, "Getting info on %s\n", full_path);
378 tlink = cifs_sb_tlink(cifs_sb);
380 return PTR_ERR(tlink);
381 tcon = tlink_tcon(tlink);
383 /* could have done a find first instead but this returns more info */
384 rc = CIFSSMBUnixQPathInfo(xid, tcon, full_path, &find_data,
385 cifs_sb->local_nls, cifs_remap(cifs_sb));
386 cifs_put_tlink(tlink);
389 cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb);
390 } else if (rc == -EREMOTE) {
391 cifs_create_dfs_fattr(&fattr, sb);
397 /* check for Minshall+French symlinks */
398 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
399 int tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr,
402 cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc);
405 if (*pinode == NULL) {
407 cifs_fill_uniqueid(sb, &fattr);
408 *pinode = cifs_iget(sb, &fattr);
412 /* we already have inode, update it */
414 /* if uniqueid is different, return error */
415 if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM &&
416 CIFS_I(*pinode)->uniqueid != fattr.cf_uniqueid)) {
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 = CREATE_NOT_DIR;
476 if (backup_cred(cifs_sb))
477 oparms.create_options |= CREATE_OPEN_BACKUP_INTENT;
478 oparms.disposition = FILE_OPEN;
481 oparms.reconnect = false;
483 if (tcon->ses->server->oplocks)
487 rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, NULL);
489 cifs_dbg(FYI, "check sfu type of %s, open rc = %d\n", path, rc);
490 cifs_put_tlink(tlink);
495 io_parms.netfid = fid.netfid;
496 io_parms.pid = current->tgid;
497 io_parms.tcon = tcon;
499 io_parms.length = 24;
501 rc = tcon->ses->server->ops->sync_read(xid, &fid, &io_parms,
502 &bytes_read, &pbuf, &buf_type);
503 if ((rc == 0) && (bytes_read >= 8)) {
504 if (memcmp("IntxBLK", pbuf, 8) == 0) {
505 cifs_dbg(FYI, "Block device\n");
506 fattr->cf_mode |= S_IFBLK;
507 fattr->cf_dtype = DT_BLK;
508 if (bytes_read == 24) {
509 /* we have enough to decode dev num */
510 __u64 mjr; /* major */
511 __u64 mnr; /* minor */
512 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
513 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
514 fattr->cf_rdev = MKDEV(mjr, mnr);
516 } else if (memcmp("IntxCHR", pbuf, 8) == 0) {
517 cifs_dbg(FYI, "Char device\n");
518 fattr->cf_mode |= S_IFCHR;
519 fattr->cf_dtype = DT_CHR;
520 if (bytes_read == 24) {
521 /* we have enough to decode dev num */
522 __u64 mjr; /* major */
523 __u64 mnr; /* minor */
524 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
525 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
526 fattr->cf_rdev = MKDEV(mjr, mnr);
528 } else if (memcmp("IntxLNK", pbuf, 7) == 0) {
529 cifs_dbg(FYI, "Symlink\n");
530 fattr->cf_mode |= S_IFLNK;
531 fattr->cf_dtype = DT_LNK;
533 fattr->cf_mode |= S_IFREG; /* file? */
534 fattr->cf_dtype = DT_REG;
538 fattr->cf_mode |= S_IFREG; /* then it is a file */
539 fattr->cf_dtype = DT_REG;
540 rc = -EOPNOTSUPP; /* or some unknown SFU type */
543 tcon->ses->server->ops->close(xid, tcon, &fid);
544 cifs_put_tlink(tlink);
548 #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
551 * Fetch mode bits as provided by SFU.
553 * FIXME: Doesn't this clobber the type bit we got from cifs_sfu_type ?
555 static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path,
556 struct cifs_sb_info *cifs_sb, unsigned int xid)
558 #ifdef CONFIG_CIFS_XATTR
562 struct tcon_link *tlink;
563 struct cifs_tcon *tcon;
565 tlink = cifs_sb_tlink(cifs_sb);
567 return PTR_ERR(tlink);
568 tcon = tlink_tcon(tlink);
570 if (tcon->ses->server->ops->query_all_EAs == NULL) {
571 cifs_put_tlink(tlink);
575 rc = tcon->ses->server->ops->query_all_EAs(xid, tcon, path,
576 "SETFILEBITS", ea_value, 4 /* size of buf */,
578 cifs_put_tlink(tlink);
582 mode = le32_to_cpu(*((__le32 *)ea_value));
583 fattr->cf_mode &= ~SFBITS_MASK;
584 cifs_dbg(FYI, "special bits 0%o org mode 0%o\n",
585 mode, fattr->cf_mode);
586 fattr->cf_mode = (mode & SFBITS_MASK) | fattr->cf_mode;
587 cifs_dbg(FYI, "special mode bits 0%o\n", mode);
596 /* Fill a cifs_fattr struct with info from FILE_ALL_INFO */
598 cifs_all_info_to_fattr(struct cifs_fattr *fattr, FILE_ALL_INFO *info,
599 struct super_block *sb, bool adjust_tz,
602 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
603 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
605 memset(fattr, 0, sizeof(*fattr));
606 fattr->cf_cifsattrs = le32_to_cpu(info->Attributes);
607 if (info->DeletePending)
608 fattr->cf_flags |= CIFS_FATTR_DELETE_PENDING;
610 if (info->LastAccessTime)
611 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
613 ktime_get_real_ts64(&fattr->cf_atime);
614 fattr->cf_atime = timespec64_trunc(fattr->cf_atime, sb->s_time_gran);
617 fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime);
618 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);
621 fattr->cf_ctime.tv_sec += tcon->ses->server->timeAdj;
622 fattr->cf_mtime.tv_sec += tcon->ses->server->timeAdj;
625 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
626 fattr->cf_bytes = le64_to_cpu(info->AllocationSize);
627 fattr->cf_createtime = le64_to_cpu(info->CreationTime);
629 fattr->cf_nlink = le32_to_cpu(info->NumberOfLinks);
632 fattr->cf_mode = S_IFLNK;
633 fattr->cf_dtype = DT_LNK;
634 } else if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
635 fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode;
636 fattr->cf_dtype = DT_DIR;
638 * Server can return wrong NumberOfLinks value for directories
639 * when Unix extensions are disabled - fake it.
642 fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK;
644 fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode;
645 fattr->cf_dtype = DT_REG;
647 /* clear write bits if ATTR_READONLY is set */
648 if (fattr->cf_cifsattrs & ATTR_READONLY)
649 fattr->cf_mode &= ~(S_IWUGO);
652 * Don't accept zero nlink from non-unix servers unless
653 * delete is pending. Instead mark it as unknown.
655 if ((fattr->cf_nlink < 1) && !tcon->unix_ext &&
656 !info->DeletePending) {
657 cifs_dbg(1, "bogus file nlink value %u\n",
659 fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK;
663 fattr->cf_uid = cifs_sb->mnt_uid;
664 fattr->cf_gid = cifs_sb->mnt_gid;
668 cifs_get_file_info(struct file *filp)
672 FILE_ALL_INFO find_data;
673 struct cifs_fattr fattr;
674 struct inode *inode = file_inode(filp);
675 struct cifsFileInfo *cfile = filp->private_data;
676 struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
677 struct TCP_Server_Info *server = tcon->ses->server;
679 if (!server->ops->query_file_info)
683 rc = server->ops->query_file_info(xid, tcon, &cfile->fid, &find_data);
686 cifs_all_info_to_fattr(&fattr, &find_data, inode->i_sb, false,
690 cifs_create_dfs_fattr(&fattr, inode->i_sb);
696 * FIXME: legacy server -- fall back to path-based call?
697 * for now, just skip revalidating and mark inode for
701 CIFS_I(inode)->time = 0;
707 * don't bother with SFU junk here -- just mark inode as needing
710 fattr.cf_uniqueid = CIFS_I(inode)->uniqueid;
711 fattr.cf_flags |= CIFS_FATTR_NEED_REVAL;
712 cifs_fattr_to_inode(inode, &fattr);
718 /* Simple function to return a 64 bit hash of string. Rarely called */
719 static __u64 simple_hashstr(const char *str)
721 const __u64 hash_mult = 1125899906842597ULL; /* a big enough prime */
725 hash = (hash + (__u64) *str++) * hash_mult;
731 cifs_get_inode_info(struct inode **inode, const char *full_path,
732 FILE_ALL_INFO *data, struct super_block *sb, int xid,
733 const struct cifs_fid *fid)
736 int rc = 0, tmprc = ENOSYS;
737 struct cifs_tcon *tcon;
738 struct TCP_Server_Info *server;
739 struct tcon_link *tlink;
740 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
742 bool adjust_tz = false;
743 struct cifs_fattr fattr;
744 struct cifs_search_info *srchinf = NULL;
745 bool symlink = false;
747 tlink = cifs_sb_tlink(cifs_sb);
749 return PTR_ERR(tlink);
750 tcon = tlink_tcon(tlink);
751 server = tcon->ses->server;
753 cifs_dbg(FYI, "Getting info on %s\n", full_path);
755 if ((data == NULL) && (*inode != NULL)) {
756 if (CIFS_CACHE_READ(CIFS_I(*inode)) &&
757 CIFS_I(*inode)->time != 0) {
758 cifs_dbg(FYI, "No need to revalidate cached inode sizes\n");
763 /* if inode info is not passed, get it from server */
765 if (!server->ops->query_path_info) {
769 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
774 data = (FILE_ALL_INFO *)buf;
775 rc = server->ops->query_path_info(xid, tcon, cifs_sb, full_path,
776 data, &adjust_tz, &symlink);
780 cifs_all_info_to_fattr(&fattr, data, sb, adjust_tz,
782 } else if (rc == -EREMOTE) {
783 cifs_create_dfs_fattr(&fattr, sb);
785 } else if ((rc == -EACCES) && backup_cred(cifs_sb) &&
786 (strcmp(server->vals->version_string, SMB1_VERSION_STRING)
789 * For SMB2 and later the backup intent flag is already
790 * sent if needed on open and there is no path based
791 * FindFirst operation to use to retry with
794 srchinf = kzalloc(sizeof(struct cifs_search_info),
796 if (srchinf == NULL) {
801 srchinf->endOfSearch = false;
803 srchinf->info_level = SMB_FIND_FILE_UNIX;
804 else if ((tcon->ses->capabilities &
805 tcon->ses->server->vals->cap_nt_find) == 0)
806 srchinf->info_level = SMB_FIND_FILE_INFO_STANDARD;
807 else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
808 srchinf->info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
809 else /* no srvino useful for fallback to some netapp */
810 srchinf->info_level = SMB_FIND_FILE_DIRECTORY_INFO;
812 srchflgs = CIFS_SEARCH_CLOSE_ALWAYS |
813 CIFS_SEARCH_CLOSE_AT_END |
814 CIFS_SEARCH_BACKUP_SEARCH;
816 rc = CIFSFindFirst(xid, tcon, full_path,
817 cifs_sb, NULL, srchflgs, srchinf, false);
819 data = (FILE_ALL_INFO *)srchinf->srch_entries_start;
821 cifs_dir_info_to_fattr(&fattr,
822 (FILE_DIRECTORY_INFO *)data, cifs_sb);
823 fattr.cf_uniqueid = le64_to_cpu(
824 ((SEARCH_ID_FULL_DIR_INFO *)data)->UniqueId);
826 cifs_buf_release(srchinf->ntwrk_buf_start);
835 * If an inode wasn't passed in, then get the inode number
837 * Is an i_ino of zero legal? Can we use that to check if the server
838 * supports returning inode numbers? Are there other sanity checks we
839 * can use to ensure that the server is really filling in that field?
841 if (*inode == NULL) {
842 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
843 if (server->ops->get_srv_inum)
844 tmprc = server->ops->get_srv_inum(xid,
845 tcon, cifs_sb, full_path,
846 &fattr.cf_uniqueid, data);
848 cifs_dbg(FYI, "GetSrvInodeNum rc %d\n",
850 fattr.cf_uniqueid = iunique(sb, ROOT_I);
851 cifs_autodisable_serverino(cifs_sb);
852 } else if ((fattr.cf_uniqueid == 0) &&
853 strlen(full_path) == 0) {
854 /* some servers ret bad root ino ie 0 */
855 cifs_dbg(FYI, "Invalid (0) inodenum\n");
857 CIFS_FATTR_FAKE_ROOT_INO;
859 simple_hashstr(tcon->treeName);
862 fattr.cf_uniqueid = iunique(sb, ROOT_I);
864 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
865 && server->ops->get_srv_inum) {
867 * Pass a NULL tcon to ensure we don't make a round
868 * trip to the server. This only works for SMB2+.
870 tmprc = server->ops->get_srv_inum(xid,
871 NULL, cifs_sb, full_path,
872 &fattr.cf_uniqueid, data);
874 fattr.cf_uniqueid = CIFS_I(*inode)->uniqueid;
875 else if ((fattr.cf_uniqueid == 0) &&
876 strlen(full_path) == 0) {
878 * Reuse existing root inode num since
879 * inum zero for root causes ls of . and .. to
882 cifs_dbg(FYI, "Srv ret 0 inode num for root\n");
883 fattr.cf_uniqueid = CIFS_I(*inode)->uniqueid;
886 fattr.cf_uniqueid = CIFS_I(*inode)->uniqueid;
889 /* query for SFU type info if supported and needed */
890 if (fattr.cf_cifsattrs & ATTR_SYSTEM &&
891 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
892 tmprc = cifs_sfu_type(&fattr, full_path, cifs_sb, xid);
894 cifs_dbg(FYI, "cifs_sfu_type failed: %d\n", tmprc);
897 /* fill in 0777 bits from ACL */
898 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID) {
899 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,
910 cifs_dbg(FYI, "%s: Getting ACL failed with error: %d\n",
916 /* fill in remaining high mode bits e.g. SUID, VTX */
917 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
918 cifs_sfu_mode(&fattr, full_path, cifs_sb, xid);
920 /* check for Minshall+French symlinks */
921 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
922 tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr,
925 cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc);
929 *inode = cifs_iget(sb, &fattr);
933 /* we already have inode, update it */
935 /* if uniqueid is different, return error */
936 if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM &&
937 CIFS_I(*inode)->uniqueid != fattr.cf_uniqueid)) {
938 CIFS_I(*inode)->time = 0; /* force reval */
943 /* if filetype is different, return error */
944 if (unlikely(((*inode)->i_mode & S_IFMT) !=
945 (fattr.cf_mode & S_IFMT))) {
946 CIFS_I(*inode)->time = 0; /* force reval */
951 cifs_fattr_to_inode(*inode, &fattr);
955 if ((*inode) && ((*inode)->i_ino == 0))
956 cifs_dbg(FYI, "inode number of zero returned\n");
959 cifs_put_tlink(tlink);
963 static const struct inode_operations cifs_ipc_inode_ops = {
964 .lookup = cifs_lookup,
968 cifs_find_inode(struct inode *inode, void *opaque)
970 struct cifs_fattr *fattr = (struct cifs_fattr *) opaque;
972 /* don't match inode with different uniqueid */
973 if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid)
976 /* use createtime like an i_generation field */
977 if (CIFS_I(inode)->createtime != fattr->cf_createtime)
980 /* don't match inode of different type */
981 if ((inode->i_mode & S_IFMT) != (fattr->cf_mode & S_IFMT))
984 /* if it's not a directory or has no dentries, then flag it */
985 if (S_ISDIR(inode->i_mode) && !hlist_empty(&inode->i_dentry))
986 fattr->cf_flags |= CIFS_FATTR_INO_COLLISION;
992 cifs_init_inode(struct inode *inode, void *opaque)
994 struct cifs_fattr *fattr = (struct cifs_fattr *) opaque;
996 CIFS_I(inode)->uniqueid = fattr->cf_uniqueid;
997 CIFS_I(inode)->createtime = fattr->cf_createtime;
1002 * walk dentry list for an inode and report whether it has aliases that
1003 * are hashed. We use this to determine if a directory inode can actually
1007 inode_has_hashed_dentries(struct inode *inode)
1009 struct dentry *dentry;
1011 spin_lock(&inode->i_lock);
1012 hlist_for_each_entry(dentry, &inode->i_dentry, d_u.d_alias) {
1013 if (!d_unhashed(dentry) || IS_ROOT(dentry)) {
1014 spin_unlock(&inode->i_lock);
1018 spin_unlock(&inode->i_lock);
1022 /* Given fattrs, get a corresponding inode */
1024 cifs_iget(struct super_block *sb, struct cifs_fattr *fattr)
1027 struct inode *inode;
1030 cifs_dbg(FYI, "looking for uniqueid=%llu\n", fattr->cf_uniqueid);
1032 /* hash down to 32-bits on 32-bit arch */
1033 hash = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid);
1035 inode = iget5_locked(sb, hash, cifs_find_inode, cifs_init_inode, fattr);
1037 /* was there a potentially problematic inode collision? */
1038 if (fattr->cf_flags & CIFS_FATTR_INO_COLLISION) {
1039 fattr->cf_flags &= ~CIFS_FATTR_INO_COLLISION;
1041 if (inode_has_hashed_dentries(inode)) {
1042 cifs_autodisable_serverino(CIFS_SB(sb));
1044 fattr->cf_uniqueid = iunique(sb, ROOT_I);
1045 goto retry_iget5_locked;
1049 cifs_fattr_to_inode(inode, fattr);
1050 if (sb->s_flags & SB_NOATIME)
1051 inode->i_flags |= S_NOATIME | S_NOCMTIME;
1052 if (inode->i_state & I_NEW) {
1053 inode->i_ino = hash;
1054 #ifdef CONFIG_CIFS_FSCACHE
1055 /* initialize per-inode cache cookie pointer */
1056 CIFS_I(inode)->fscache = NULL;
1058 unlock_new_inode(inode);
1065 /* gets root inode */
1066 struct inode *cifs_root_iget(struct super_block *sb)
1069 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1070 struct inode *inode = NULL;
1072 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
1076 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH)
1077 && cifs_sb->prepath) {
1078 len = strlen(cifs_sb->prepath);
1079 path = kzalloc(len + 2 /* leading sep + null */, GFP_KERNEL);
1081 return ERR_PTR(-ENOMEM);
1083 memcpy(path+1, cifs_sb->prepath, len);
1085 path = kstrdup("", GFP_KERNEL);
1087 return ERR_PTR(-ENOMEM);
1091 if (tcon->unix_ext) {
1092 rc = cifs_get_inode_info_unix(&inode, path, sb, xid);
1093 /* some servers mistakenly claim POSIX support */
1094 if (rc != -EOPNOTSUPP)
1096 cifs_dbg(VFS, "server does not support POSIX extensions");
1097 tcon->unix_ext = false;
1100 convert_delimiter(path, CIFS_DIR_SEP(cifs_sb));
1101 rc = cifs_get_inode_info(&inode, path, NULL, sb, xid, NULL);
1105 inode = ERR_PTR(rc);
1109 #ifdef CONFIG_CIFS_FSCACHE
1110 /* populate tcon->resource_id */
1111 tcon->resource_id = CIFS_I(inode)->uniqueid;
1114 if (rc && tcon->pipe) {
1115 cifs_dbg(FYI, "ipc connection - fake read inode\n");
1116 spin_lock(&inode->i_lock);
1117 inode->i_mode |= S_IFDIR;
1118 set_nlink(inode, 2);
1119 inode->i_op = &cifs_ipc_inode_ops;
1120 inode->i_fop = &simple_dir_operations;
1121 inode->i_uid = cifs_sb->mnt_uid;
1122 inode->i_gid = cifs_sb->mnt_gid;
1123 spin_unlock(&inode->i_lock);
1126 inode = ERR_PTR(rc);
1136 cifs_set_file_info(struct inode *inode, struct iattr *attrs, unsigned int xid,
1137 char *full_path, __u32 dosattr)
1139 bool set_time = false;
1140 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1141 struct TCP_Server_Info *server;
1142 FILE_BASIC_INFO info_buf;
1147 server = cifs_sb_master_tcon(cifs_sb)->ses->server;
1148 if (!server->ops->set_file_info)
1153 if (attrs->ia_valid & ATTR_ATIME) {
1155 info_buf.LastAccessTime =
1156 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1158 info_buf.LastAccessTime = 0;
1160 if (attrs->ia_valid & ATTR_MTIME) {
1162 info_buf.LastWriteTime =
1163 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1165 info_buf.LastWriteTime = 0;
1168 * Samba throws this field away, but windows may actually use it.
1169 * Do not set ctime unless other time stamps are changed explicitly
1170 * (i.e. by utimes()) since we would then have a mix of client and
1173 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1174 cifs_dbg(FYI, "CIFS - CTIME changed\n");
1175 info_buf.ChangeTime =
1176 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1178 info_buf.ChangeTime = 0;
1180 info_buf.CreationTime = 0; /* don't change */
1181 info_buf.Attributes = cpu_to_le32(dosattr);
1183 return server->ops->set_file_info(inode, full_path, &info_buf, xid);
1187 * Open the given file (if it isn't already), set the DELETE_ON_CLOSE bit
1188 * and rename it to a random name that hopefully won't conflict with
1192 cifs_rename_pending_delete(const char *full_path, struct dentry *dentry,
1193 const unsigned int xid)
1197 struct cifs_fid fid;
1198 struct cifs_open_parms oparms;
1199 struct inode *inode = d_inode(dentry);
1200 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1201 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1202 struct tcon_link *tlink;
1203 struct cifs_tcon *tcon;
1204 __u32 dosattr, origattr;
1205 FILE_BASIC_INFO *info_buf = NULL;
1207 tlink = cifs_sb_tlink(cifs_sb);
1209 return PTR_ERR(tlink);
1210 tcon = tlink_tcon(tlink);
1213 * We cannot rename the file if the server doesn't support
1214 * CAP_INFOLEVEL_PASSTHRU
1216 if (!(tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)) {
1222 oparms.cifs_sb = cifs_sb;
1223 oparms.desired_access = DELETE | FILE_WRITE_ATTRIBUTES;
1224 oparms.create_options = CREATE_NOT_DIR;
1225 oparms.disposition = FILE_OPEN;
1226 oparms.path = full_path;
1228 oparms.reconnect = false;
1230 rc = CIFS_open(xid, &oparms, &oplock, NULL);
1234 origattr = cifsInode->cifsAttrs;
1236 origattr |= ATTR_NORMAL;
1238 dosattr = origattr & ~ATTR_READONLY;
1240 dosattr |= ATTR_NORMAL;
1241 dosattr |= ATTR_HIDDEN;
1243 /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */
1244 if (dosattr != origattr) {
1245 info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL);
1246 if (info_buf == NULL) {
1250 info_buf->Attributes = cpu_to_le32(dosattr);
1251 rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid,
1253 /* although we would like to mark the file hidden
1254 if that fails we will still try to rename it */
1256 cifsInode->cifsAttrs = dosattr;
1258 dosattr = origattr; /* since not able to change them */
1261 /* rename the file */
1262 rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, NULL,
1264 cifs_remap(cifs_sb));
1270 /* try to set DELETE_ON_CLOSE */
1271 if (!test_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags)) {
1272 rc = CIFSSMBSetFileDisposition(xid, tcon, true, fid.netfid,
1275 * some samba versions return -ENOENT when we try to set the
1276 * file disposition here. Likely a samba bug, but work around
1277 * it for now. This means that some cifsXXX files may hang
1278 * around after they shouldn't.
1280 * BB: remove this hack after more servers have the fix
1288 set_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags);
1292 CIFSSMBClose(xid, tcon, fid.netfid);
1295 cifs_put_tlink(tlink);
1299 * reset everything back to the original state. Don't bother
1300 * dealing with errors here since we can't do anything about
1304 CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, dentry->d_name.name,
1305 cifs_sb->local_nls, cifs_remap(cifs_sb));
1307 if (dosattr != origattr) {
1308 info_buf->Attributes = cpu_to_le32(origattr);
1309 if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid,
1311 cifsInode->cifsAttrs = origattr;
1317 /* copied from fs/nfs/dir.c with small changes */
1319 cifs_drop_nlink(struct inode *inode)
1321 spin_lock(&inode->i_lock);
1322 if (inode->i_nlink > 0)
1324 spin_unlock(&inode->i_lock);
1328 * If d_inode(dentry) is null (usually meaning the cached dentry
1329 * is a negative dentry) then we would attempt a standard SMB delete, but
1330 * if that fails we can not attempt the fall back mechanisms on EACCES
1331 * but will return the EACCES to the caller. Note that the VFS does not call
1332 * unlink on negative dentries currently.
1334 int cifs_unlink(struct inode *dir, struct dentry *dentry)
1338 char *full_path = NULL;
1339 struct inode *inode = d_inode(dentry);
1340 struct cifsInodeInfo *cifs_inode;
1341 struct super_block *sb = dir->i_sb;
1342 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1343 struct tcon_link *tlink;
1344 struct cifs_tcon *tcon;
1345 struct TCP_Server_Info *server;
1346 struct iattr *attrs = NULL;
1347 __u32 dosattr = 0, origattr = 0;
1349 cifs_dbg(FYI, "cifs_unlink, dir=0x%p, dentry=0x%p\n", dir, dentry);
1351 tlink = cifs_sb_tlink(cifs_sb);
1353 return PTR_ERR(tlink);
1354 tcon = tlink_tcon(tlink);
1355 server = tcon->ses->server;
1359 /* Unlink can be called from rename so we can not take the
1360 * sb->s_vfs_rename_mutex here */
1361 full_path = build_path_from_dentry(dentry);
1362 if (full_path == NULL) {
1367 if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1368 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1369 rc = CIFSPOSIXDelFile(xid, tcon, full_path,
1370 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
1371 cifs_remap(cifs_sb));
1372 cifs_dbg(FYI, "posix del rc %d\n", rc);
1373 if ((rc == 0) || (rc == -ENOENT))
1374 goto psx_del_no_retry;
1378 if (!server->ops->unlink) {
1380 goto psx_del_no_retry;
1383 rc = server->ops->unlink(xid, tcon, full_path, cifs_sb);
1388 cifs_drop_nlink(inode);
1389 } else if (rc == -ENOENT) {
1391 } else if (rc == -EBUSY) {
1392 if (server->ops->rename_pending_delete) {
1393 rc = server->ops->rename_pending_delete(full_path,
1396 cifs_drop_nlink(inode);
1398 } else if ((rc == -EACCES) && (dosattr == 0) && inode) {
1399 attrs = kzalloc(sizeof(*attrs), GFP_KERNEL);
1400 if (attrs == NULL) {
1405 /* try to reset dos attributes */
1406 cifs_inode = CIFS_I(inode);
1407 origattr = cifs_inode->cifsAttrs;
1409 origattr |= ATTR_NORMAL;
1410 dosattr = origattr & ~ATTR_READONLY;
1412 dosattr |= ATTR_NORMAL;
1413 dosattr |= ATTR_HIDDEN;
1415 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
1419 goto retry_std_delete;
1422 /* undo the setattr if we errored out and it's needed */
1423 if (rc != 0 && dosattr != 0)
1424 cifs_set_file_info(inode, attrs, xid, full_path, origattr);
1428 cifs_inode = CIFS_I(inode);
1429 cifs_inode->time = 0; /* will force revalidate to get info
1431 inode->i_ctime = current_time(inode);
1433 dir->i_ctime = dir->i_mtime = current_time(dir);
1434 cifs_inode = CIFS_I(dir);
1435 CIFS_I(dir)->time = 0; /* force revalidate of dir as well */
1440 cifs_put_tlink(tlink);
1445 cifs_mkdir_qinfo(struct inode *parent, struct dentry *dentry, umode_t mode,
1446 const char *full_path, struct cifs_sb_info *cifs_sb,
1447 struct cifs_tcon *tcon, const unsigned int xid)
1450 struct inode *inode = NULL;
1453 rc = cifs_get_inode_info_unix(&inode, full_path, parent->i_sb,
1456 rc = cifs_get_inode_info(&inode, full_path, NULL, parent->i_sb,
1463 * setting nlink not necessary except in cases where we failed to get it
1464 * from the server or was set bogus. Also, since this is a brand new
1465 * inode, no need to grab the i_lock before setting the i_nlink.
1467 if (inode->i_nlink < 2)
1468 set_nlink(inode, 2);
1469 mode &= ~current_umask();
1470 /* must turn on setgid bit if parent dir has it */
1471 if (parent->i_mode & S_ISGID)
1474 if (tcon->unix_ext) {
1475 struct cifs_unix_set_info_args args = {
1477 .ctime = NO_CHANGE_64,
1478 .atime = NO_CHANGE_64,
1479 .mtime = NO_CHANGE_64,
1482 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1483 args.uid = current_fsuid();
1484 if (parent->i_mode & S_ISGID)
1485 args.gid = parent->i_gid;
1487 args.gid = current_fsgid();
1489 args.uid = INVALID_UID; /* no change */
1490 args.gid = INVALID_GID; /* no change */
1492 CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args,
1494 cifs_remap(cifs_sb));
1496 struct TCP_Server_Info *server = tcon->ses->server;
1497 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
1498 (mode & S_IWUGO) == 0 && server->ops->mkdir_setinfo)
1499 server->ops->mkdir_setinfo(inode, full_path, cifs_sb,
1501 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
1502 inode->i_mode = (mode | S_IFDIR);
1504 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1505 inode->i_uid = current_fsuid();
1506 if (inode->i_mode & S_ISGID)
1507 inode->i_gid = parent->i_gid;
1509 inode->i_gid = current_fsgid();
1512 d_instantiate(dentry, inode);
1517 cifs_posix_mkdir(struct inode *inode, struct dentry *dentry, umode_t mode,
1518 const char *full_path, struct cifs_sb_info *cifs_sb,
1519 struct cifs_tcon *tcon, const unsigned int xid)
1523 FILE_UNIX_BASIC_INFO *info = NULL;
1524 struct inode *newinode = NULL;
1525 struct cifs_fattr fattr;
1527 info = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1530 goto posix_mkdir_out;
1533 mode &= ~current_umask();
1534 rc = CIFSPOSIXCreate(xid, tcon, SMB_O_DIRECTORY | SMB_O_CREAT, mode,
1535 NULL /* netfid */, info, &oplock, full_path,
1536 cifs_sb->local_nls, cifs_remap(cifs_sb));
1537 if (rc == -EOPNOTSUPP)
1538 goto posix_mkdir_out;
1540 cifs_dbg(FYI, "posix mkdir returned 0x%x\n", rc);
1542 goto posix_mkdir_out;
1545 if (info->Type == cpu_to_le32(-1))
1546 /* no return info, go query for it */
1547 goto posix_mkdir_get_info;
1549 * BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if
1550 * need to set uid/gid.
1553 cifs_unix_basic_to_fattr(&fattr, info, cifs_sb);
1554 cifs_fill_uniqueid(inode->i_sb, &fattr);
1555 newinode = cifs_iget(inode->i_sb, &fattr);
1557 goto posix_mkdir_get_info;
1559 d_instantiate(dentry, newinode);
1561 #ifdef CONFIG_CIFS_DEBUG2
1562 cifs_dbg(FYI, "instantiated dentry %p %pd to inode %p\n",
1563 dentry, dentry, newinode);
1565 if (newinode->i_nlink != 2)
1566 cifs_dbg(FYI, "unexpected number of links %d\n",
1573 posix_mkdir_get_info:
1574 rc = cifs_mkdir_qinfo(inode, dentry, mode, full_path, cifs_sb, tcon,
1576 goto posix_mkdir_out;
1579 int cifs_mkdir(struct inode *inode, struct dentry *direntry, umode_t mode)
1583 struct cifs_sb_info *cifs_sb;
1584 struct tcon_link *tlink;
1585 struct cifs_tcon *tcon;
1586 struct TCP_Server_Info *server;
1589 cifs_dbg(FYI, "In cifs_mkdir, mode = 0x%hx inode = 0x%p\n",
1592 cifs_sb = CIFS_SB(inode->i_sb);
1593 tlink = cifs_sb_tlink(cifs_sb);
1595 return PTR_ERR(tlink);
1596 tcon = tlink_tcon(tlink);
1600 full_path = build_path_from_dentry(direntry);
1601 if (full_path == NULL) {
1606 server = tcon->ses->server;
1608 if ((server->ops->posix_mkdir) && (tcon->posix_extensions)) {
1609 rc = server->ops->posix_mkdir(xid, inode, mode, tcon, full_path,
1611 d_drop(direntry); /* for time being always refresh inode info */
1615 if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1616 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1617 rc = cifs_posix_mkdir(inode, direntry, mode, full_path, cifs_sb,
1619 if (rc != -EOPNOTSUPP)
1623 if (!server->ops->mkdir) {
1628 /* BB add setting the equivalent of mode via CreateX w/ACLs */
1629 rc = server->ops->mkdir(xid, inode, mode, tcon, full_path, cifs_sb);
1631 cifs_dbg(FYI, "cifs_mkdir returned 0x%x\n", rc);
1636 /* TODO: skip this for smb2/smb3 */
1637 rc = cifs_mkdir_qinfo(inode, direntry, mode, full_path, cifs_sb, tcon,
1641 * Force revalidate to get parent dir info when needed since cached
1642 * attributes are invalid now.
1644 CIFS_I(inode)->time = 0;
1647 cifs_put_tlink(tlink);
1651 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1655 struct cifs_sb_info *cifs_sb;
1656 struct tcon_link *tlink;
1657 struct cifs_tcon *tcon;
1658 struct TCP_Server_Info *server;
1659 char *full_path = NULL;
1660 struct cifsInodeInfo *cifsInode;
1662 cifs_dbg(FYI, "cifs_rmdir, inode = 0x%p\n", inode);
1666 full_path = build_path_from_dentry(direntry);
1667 if (full_path == NULL) {
1672 cifs_sb = CIFS_SB(inode->i_sb);
1673 tlink = cifs_sb_tlink(cifs_sb);
1674 if (IS_ERR(tlink)) {
1675 rc = PTR_ERR(tlink);
1678 tcon = tlink_tcon(tlink);
1679 server = tcon->ses->server;
1681 if (!server->ops->rmdir) {
1683 cifs_put_tlink(tlink);
1687 rc = server->ops->rmdir(xid, tcon, full_path, cifs_sb);
1688 cifs_put_tlink(tlink);
1691 spin_lock(&d_inode(direntry)->i_lock);
1692 i_size_write(d_inode(direntry), 0);
1693 clear_nlink(d_inode(direntry));
1694 spin_unlock(&d_inode(direntry)->i_lock);
1697 cifsInode = CIFS_I(d_inode(direntry));
1698 /* force revalidate to go get info when needed */
1699 cifsInode->time = 0;
1701 cifsInode = CIFS_I(inode);
1703 * Force revalidate to get parent dir info when needed since cached
1704 * attributes are invalid now.
1706 cifsInode->time = 0;
1708 d_inode(direntry)->i_ctime = inode->i_ctime = inode->i_mtime =
1709 current_time(inode);
1718 cifs_do_rename(const unsigned int xid, struct dentry *from_dentry,
1719 const char *from_path, struct dentry *to_dentry,
1720 const char *to_path)
1722 struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb);
1723 struct tcon_link *tlink;
1724 struct cifs_tcon *tcon;
1725 struct TCP_Server_Info *server;
1726 struct cifs_fid fid;
1727 struct cifs_open_parms oparms;
1730 tlink = cifs_sb_tlink(cifs_sb);
1732 return PTR_ERR(tlink);
1733 tcon = tlink_tcon(tlink);
1734 server = tcon->ses->server;
1736 if (!server->ops->rename)
1739 /* try path-based rename first */
1740 rc = server->ops->rename(xid, tcon, from_path, to_path, cifs_sb);
1743 * Don't bother with rename by filehandle unless file is busy and
1744 * source. Note that cross directory moves do not work with
1745 * rename by filehandle to various Windows servers.
1747 if (rc == 0 || rc != -EBUSY)
1748 goto do_rename_exit;
1750 /* Don't fall back to using SMB on SMB 2+ mount */
1751 if (server->vals->protocol_id != 0)
1752 goto do_rename_exit;
1754 /* open-file renames don't work across directories */
1755 if (to_dentry->d_parent != from_dentry->d_parent)
1756 goto do_rename_exit;
1759 oparms.cifs_sb = cifs_sb;
1760 /* open the file to be renamed -- we need DELETE perms */
1761 oparms.desired_access = DELETE;
1762 oparms.create_options = CREATE_NOT_DIR;
1763 oparms.disposition = FILE_OPEN;
1764 oparms.path = from_path;
1766 oparms.reconnect = false;
1768 rc = CIFS_open(xid, &oparms, &oplock, NULL);
1770 rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid,
1771 (const char *) to_dentry->d_name.name,
1772 cifs_sb->local_nls, cifs_remap(cifs_sb));
1773 CIFSSMBClose(xid, tcon, fid.netfid);
1776 cifs_put_tlink(tlink);
1781 cifs_rename2(struct inode *source_dir, struct dentry *source_dentry,
1782 struct inode *target_dir, struct dentry *target_dentry,
1785 char *from_name = NULL;
1786 char *to_name = NULL;
1787 struct cifs_sb_info *cifs_sb;
1788 struct tcon_link *tlink;
1789 struct cifs_tcon *tcon;
1790 FILE_UNIX_BASIC_INFO *info_buf_source = NULL;
1791 FILE_UNIX_BASIC_INFO *info_buf_target;
1795 if (flags & ~RENAME_NOREPLACE)
1798 cifs_sb = CIFS_SB(source_dir->i_sb);
1799 tlink = cifs_sb_tlink(cifs_sb);
1801 return PTR_ERR(tlink);
1802 tcon = tlink_tcon(tlink);
1807 * we already have the rename sem so we do not need to
1808 * grab it again here to protect the path integrity
1810 from_name = build_path_from_dentry(source_dentry);
1811 if (from_name == NULL) {
1813 goto cifs_rename_exit;
1816 to_name = build_path_from_dentry(target_dentry);
1817 if (to_name == NULL) {
1819 goto cifs_rename_exit;
1822 rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry,
1826 * No-replace is the natural behavior for CIFS, so skip unlink hacks.
1828 if (flags & RENAME_NOREPLACE)
1829 goto cifs_rename_exit;
1831 if (rc == -EEXIST && tcon->unix_ext) {
1833 * Are src and dst hardlinks of same inode? We can only tell
1834 * with unix extensions enabled.
1837 kmalloc_array(2, sizeof(FILE_UNIX_BASIC_INFO),
1839 if (info_buf_source == NULL) {
1841 goto cifs_rename_exit;
1844 info_buf_target = info_buf_source + 1;
1845 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, from_name,
1848 cifs_remap(cifs_sb));
1852 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, to_name,
1855 cifs_remap(cifs_sb));
1857 if (tmprc == 0 && (info_buf_source->UniqueId ==
1858 info_buf_target->UniqueId)) {
1859 /* same file, POSIX says that this is a noop */
1861 goto cifs_rename_exit;
1865 * else ... BB we could add the same check for Windows by
1866 * checking the UniqueId via FILE_INTERNAL_INFO
1870 /* Try unlinking the target dentry if it's not negative */
1871 if (d_really_is_positive(target_dentry) && (rc == -EACCES || rc == -EEXIST)) {
1872 if (d_is_dir(target_dentry))
1873 tmprc = cifs_rmdir(target_dir, target_dentry);
1875 tmprc = cifs_unlink(target_dir, target_dentry);
1877 goto cifs_rename_exit;
1878 rc = cifs_do_rename(xid, source_dentry, from_name,
1879 target_dentry, to_name);
1882 /* force revalidate to go get info when needed */
1883 CIFS_I(source_dir)->time = CIFS_I(target_dir)->time = 0;
1885 source_dir->i_ctime = source_dir->i_mtime = target_dir->i_ctime =
1886 target_dir->i_mtime = current_time(source_dir);
1889 kfree(info_buf_source);
1893 cifs_put_tlink(tlink);
1898 cifs_inode_needs_reval(struct inode *inode)
1900 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
1901 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1903 if (cifs_i->time == 0)
1906 if (CIFS_CACHE_READ(cifs_i))
1909 if (!lookupCacheEnabled)
1912 if (!cifs_sb->actimeo)
1915 if (!time_in_range(jiffies, cifs_i->time,
1916 cifs_i->time + cifs_sb->actimeo))
1919 /* hardlinked files w/ noserverino get "special" treatment */
1920 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) &&
1921 S_ISREG(inode->i_mode) && inode->i_nlink != 1)
1928 * Zap the cache. Called when invalid_mapping flag is set.
1931 cifs_invalidate_mapping(struct inode *inode)
1935 if (inode->i_mapping && inode->i_mapping->nrpages != 0) {
1936 rc = invalidate_inode_pages2(inode->i_mapping);
1938 cifs_dbg(VFS, "%s: could not invalidate inode %p\n",
1942 cifs_fscache_reset_inode_cookie(inode);
1947 * cifs_wait_bit_killable - helper for functions that are sleeping on bit locks
1948 * @word: long word containing the bit lock
1951 cifs_wait_bit_killable(struct wait_bit_key *key, int mode)
1953 freezable_schedule_unsafe();
1954 if (signal_pending_state(mode, current))
1955 return -ERESTARTSYS;
1960 cifs_revalidate_mapping(struct inode *inode)
1963 unsigned long *flags = &CIFS_I(inode)->flags;
1965 rc = wait_on_bit_lock_action(flags, CIFS_INO_LOCK, cifs_wait_bit_killable,
1970 if (test_and_clear_bit(CIFS_INO_INVALID_MAPPING, flags)) {
1971 rc = cifs_invalidate_mapping(inode);
1973 set_bit(CIFS_INO_INVALID_MAPPING, flags);
1976 clear_bit_unlock(CIFS_INO_LOCK, flags);
1977 smp_mb__after_atomic();
1978 wake_up_bit(flags, CIFS_INO_LOCK);
1984 cifs_zap_mapping(struct inode *inode)
1986 set_bit(CIFS_INO_INVALID_MAPPING, &CIFS_I(inode)->flags);
1987 return cifs_revalidate_mapping(inode);
1990 int cifs_revalidate_file_attr(struct file *filp)
1993 struct inode *inode = file_inode(filp);
1994 struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data;
1996 if (!cifs_inode_needs_reval(inode))
1999 if (tlink_tcon(cfile->tlink)->unix_ext)
2000 rc = cifs_get_file_info_unix(filp);
2002 rc = cifs_get_file_info(filp);
2007 int cifs_revalidate_dentry_attr(struct dentry *dentry)
2011 struct inode *inode = d_inode(dentry);
2012 struct super_block *sb = dentry->d_sb;
2013 char *full_path = NULL;
2018 if (!cifs_inode_needs_reval(inode))
2023 /* can not safely grab the rename sem here if rename calls revalidate
2024 since that would deadlock */
2025 full_path = build_path_from_dentry(dentry);
2026 if (full_path == NULL) {
2031 cifs_dbg(FYI, "Update attributes: %s inode 0x%p count %d dentry: 0x%p d_time %ld jiffies %ld\n",
2032 full_path, inode, inode->i_count.counter,
2033 dentry, cifs_get_time(dentry), jiffies);
2035 if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext)
2036 rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid);
2038 rc = cifs_get_inode_info(&inode, full_path, NULL, sb,
2047 int cifs_revalidate_file(struct file *filp)
2050 struct inode *inode = file_inode(filp);
2052 rc = cifs_revalidate_file_attr(filp);
2056 return cifs_revalidate_mapping(inode);
2059 /* revalidate a dentry's inode attributes */
2060 int cifs_revalidate_dentry(struct dentry *dentry)
2063 struct inode *inode = d_inode(dentry);
2065 rc = cifs_revalidate_dentry_attr(dentry);
2069 return cifs_revalidate_mapping(inode);
2072 int cifs_getattr(const struct path *path, struct kstat *stat,
2073 u32 request_mask, unsigned int flags)
2075 struct dentry *dentry = path->dentry;
2076 struct cifs_sb_info *cifs_sb = CIFS_SB(dentry->d_sb);
2077 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
2078 struct inode *inode = d_inode(dentry);
2082 * We need to be sure that all dirty pages are written and the server
2083 * has actual ctime, mtime and file length.
2085 if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
2086 inode->i_mapping->nrpages != 0) {
2087 rc = filemap_fdatawait(inode->i_mapping);
2089 mapping_set_error(inode->i_mapping, rc);
2094 rc = cifs_revalidate_dentry_attr(dentry);
2098 generic_fillattr(inode, stat);
2099 stat->blksize = cifs_sb->bsize;
2100 stat->ino = CIFS_I(inode)->uniqueid;
2102 /* old CIFS Unix Extensions doesn't return create time */
2103 if (CIFS_I(inode)->createtime) {
2104 stat->result_mask |= STATX_BTIME;
2106 cifs_NTtimeToUnix(cpu_to_le64(CIFS_I(inode)->createtime));
2109 stat->attributes_mask |= (STATX_ATTR_COMPRESSED | STATX_ATTR_ENCRYPTED);
2110 if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_COMPRESSED)
2111 stat->attributes |= STATX_ATTR_COMPRESSED;
2112 if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_ENCRYPTED)
2113 stat->attributes |= STATX_ATTR_ENCRYPTED;
2116 * If on a multiuser mount without unix extensions or cifsacl being
2117 * enabled, and the admin hasn't overridden them, set the ownership
2118 * to the fsuid/fsgid of the current process.
2120 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) &&
2121 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
2123 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID))
2124 stat->uid = current_fsuid();
2125 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID))
2126 stat->gid = current_fsgid();
2131 int cifs_fiemap(struct inode *inode, struct fiemap_extent_info *fei, u64 start,
2134 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2135 struct cifs_sb_info *cifs_sb = CIFS_SB(cifs_i->vfs_inode.i_sb);
2136 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
2137 struct TCP_Server_Info *server = tcon->ses->server;
2138 struct cifsFileInfo *cfile;
2142 * We need to be sure that all dirty pages are written as they
2143 * might fill holes on the server.
2145 if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
2146 inode->i_mapping->nrpages != 0) {
2147 rc = filemap_fdatawait(inode->i_mapping);
2149 mapping_set_error(inode->i_mapping, rc);
2154 cfile = find_readable_file(cifs_i, false);
2158 if (server->ops->fiemap) {
2159 rc = server->ops->fiemap(tcon, cfile, fei, start, len);
2160 cifsFileInfo_put(cfile);
2164 cifsFileInfo_put(cfile);
2168 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
2170 pgoff_t index = from >> PAGE_SHIFT;
2171 unsigned offset = from & (PAGE_SIZE - 1);
2175 page = grab_cache_page(mapping, index);
2179 zero_user_segment(page, offset, PAGE_SIZE);
2185 static void cifs_setsize(struct inode *inode, loff_t offset)
2187 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2189 spin_lock(&inode->i_lock);
2190 i_size_write(inode, offset);
2191 spin_unlock(&inode->i_lock);
2193 /* Cached inode must be refreshed on truncate */
2195 truncate_pagecache(inode, offset);
2199 cifs_set_file_size(struct inode *inode, struct iattr *attrs,
2200 unsigned int xid, char *full_path)
2203 struct cifsFileInfo *open_file;
2204 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2205 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2206 struct tcon_link *tlink = NULL;
2207 struct cifs_tcon *tcon = NULL;
2208 struct TCP_Server_Info *server;
2211 * To avoid spurious oplock breaks from server, in the case of
2212 * inodes that we already have open, avoid doing path based
2213 * setting of file size if we can do it by handle.
2214 * This keeps our caching token (oplock) and avoids timeouts
2215 * when the local oplock break takes longer to flush
2216 * writebehind data than the SMB timeout for the SetPathInfo
2217 * request would allow
2219 open_file = find_writable_file(cifsInode, true);
2221 tcon = tlink_tcon(open_file->tlink);
2222 server = tcon->ses->server;
2223 if (server->ops->set_file_size)
2224 rc = server->ops->set_file_size(xid, tcon, open_file,
2225 attrs->ia_size, false);
2228 cifsFileInfo_put(open_file);
2229 cifs_dbg(FYI, "SetFSize for attrs rc = %d\n", rc);
2237 tlink = cifs_sb_tlink(cifs_sb);
2239 return PTR_ERR(tlink);
2240 tcon = tlink_tcon(tlink);
2241 server = tcon->ses->server;
2245 * Set file size by pathname rather than by handle either because no
2246 * valid, writeable file handle for it was found or because there was
2247 * an error setting it by handle.
2249 if (server->ops->set_path_size)
2250 rc = server->ops->set_path_size(xid, tcon, full_path,
2251 attrs->ia_size, cifs_sb, false);
2254 cifs_dbg(FYI, "SetEOF by path (setattrs) rc = %d\n", rc);
2257 cifs_put_tlink(tlink);
2261 cifsInode->server_eof = attrs->ia_size;
2262 cifs_setsize(inode, attrs->ia_size);
2263 cifs_truncate_page(inode->i_mapping, inode->i_size);
2270 cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
2274 char *full_path = NULL;
2275 struct inode *inode = d_inode(direntry);
2276 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2277 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2278 struct tcon_link *tlink;
2279 struct cifs_tcon *pTcon;
2280 struct cifs_unix_set_info_args *args = NULL;
2281 struct cifsFileInfo *open_file;
2283 cifs_dbg(FYI, "setattr_unix on file %pd attrs->ia_valid=0x%x\n",
2284 direntry, attrs->ia_valid);
2288 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
2289 attrs->ia_valid |= ATTR_FORCE;
2291 rc = setattr_prepare(direntry, attrs);
2295 full_path = build_path_from_dentry(direntry);
2296 if (full_path == NULL) {
2302 * Attempt to flush data before changing attributes. We need to do
2303 * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the
2304 * ownership or mode then we may also need to do this. Here, we take
2305 * the safe way out and just do the flush on all setattr requests. If
2306 * the flush returns error, store it to report later and continue.
2308 * BB: This should be smarter. Why bother flushing pages that
2309 * will be truncated anyway? Also, should we error out here if
2310 * the flush returns error?
2312 rc = filemap_write_and_wait(inode->i_mapping);
2313 if (is_interrupt_error(rc)) {
2318 mapping_set_error(inode->i_mapping, rc);
2321 if (attrs->ia_valid & ATTR_SIZE) {
2322 rc = cifs_set_file_size(inode, attrs, xid, full_path);
2327 /* skip mode change if it's just for clearing setuid/setgid */
2328 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
2329 attrs->ia_valid &= ~ATTR_MODE;
2331 args = kmalloc(sizeof(*args), GFP_KERNEL);
2337 /* set up the struct */
2338 if (attrs->ia_valid & ATTR_MODE)
2339 args->mode = attrs->ia_mode;
2341 args->mode = NO_CHANGE_64;
2343 if (attrs->ia_valid & ATTR_UID)
2344 args->uid = attrs->ia_uid;
2346 args->uid = INVALID_UID; /* no change */
2348 if (attrs->ia_valid & ATTR_GID)
2349 args->gid = attrs->ia_gid;
2351 args->gid = INVALID_GID; /* no change */
2353 if (attrs->ia_valid & ATTR_ATIME)
2354 args->atime = cifs_UnixTimeToNT(attrs->ia_atime);
2356 args->atime = NO_CHANGE_64;
2358 if (attrs->ia_valid & ATTR_MTIME)
2359 args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime);
2361 args->mtime = NO_CHANGE_64;
2363 if (attrs->ia_valid & ATTR_CTIME)
2364 args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime);
2366 args->ctime = NO_CHANGE_64;
2369 open_file = find_writable_file(cifsInode, true);
2371 u16 nfid = open_file->fid.netfid;
2372 u32 npid = open_file->pid;
2373 pTcon = tlink_tcon(open_file->tlink);
2374 rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid);
2375 cifsFileInfo_put(open_file);
2377 tlink = cifs_sb_tlink(cifs_sb);
2378 if (IS_ERR(tlink)) {
2379 rc = PTR_ERR(tlink);
2382 pTcon = tlink_tcon(tlink);
2383 rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args,
2385 cifs_remap(cifs_sb));
2386 cifs_put_tlink(tlink);
2392 if ((attrs->ia_valid & ATTR_SIZE) &&
2393 attrs->ia_size != i_size_read(inode))
2394 truncate_setsize(inode, attrs->ia_size);
2396 setattr_copy(inode, attrs);
2397 mark_inode_dirty(inode);
2399 /* force revalidate when any of these times are set since some
2400 of the fs types (eg ext3, fat) do not have fine enough
2401 time granularity to match protocol, and we do not have a
2402 a way (yet) to query the server fs's time granularity (and
2403 whether it rounds times down).
2405 if (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME))
2406 cifsInode->time = 0;
2415 cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
2418 kuid_t uid = INVALID_UID;
2419 kgid_t gid = INVALID_GID;
2420 struct inode *inode = d_inode(direntry);
2421 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2422 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2423 struct cifsFileInfo *wfile;
2424 struct cifs_tcon *tcon;
2425 char *full_path = NULL;
2428 __u64 mode = NO_CHANGE_64;
2432 cifs_dbg(FYI, "setattr on file %pd attrs->ia_valid 0x%x\n",
2433 direntry, attrs->ia_valid);
2435 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
2436 attrs->ia_valid |= ATTR_FORCE;
2438 rc = setattr_prepare(direntry, attrs);
2444 full_path = build_path_from_dentry(direntry);
2445 if (full_path == NULL) {
2452 * Attempt to flush data before changing attributes. We need to do
2453 * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the
2454 * ownership or mode then we may also need to do this. Here, we take
2455 * the safe way out and just do the flush on all setattr requests. If
2456 * the flush returns error, store it to report later and continue.
2458 * BB: This should be smarter. Why bother flushing pages that
2459 * will be truncated anyway? Also, should we error out here if
2460 * the flush returns error?
2462 rc = filemap_write_and_wait(inode->i_mapping);
2463 if (is_interrupt_error(rc)) {
2465 goto cifs_setattr_exit;
2468 mapping_set_error(inode->i_mapping, rc);
2471 if (attrs->ia_valid & ATTR_MTIME) {
2472 rc = cifs_get_writable_file(cifsInode, false, &wfile);
2474 tcon = tlink_tcon(wfile->tlink);
2475 rc = tcon->ses->server->ops->flush(xid, tcon, &wfile->fid);
2476 cifsFileInfo_put(wfile);
2478 goto cifs_setattr_exit;
2479 } else if (rc != -EBADF)
2480 goto cifs_setattr_exit;
2485 if (attrs->ia_valid & ATTR_SIZE) {
2486 rc = cifs_set_file_size(inode, attrs, xid, full_path);
2488 goto cifs_setattr_exit;
2491 if (attrs->ia_valid & ATTR_UID)
2492 uid = attrs->ia_uid;
2494 if (attrs->ia_valid & ATTR_GID)
2495 gid = attrs->ia_gid;
2497 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) ||
2498 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) {
2499 if (uid_valid(uid) || gid_valid(gid)) {
2500 rc = id_mode_to_cifs_acl(inode, full_path, NO_CHANGE_64,
2503 cifs_dbg(FYI, "%s: Setting id failed with error: %d\n",
2505 goto cifs_setattr_exit;
2509 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID))
2510 attrs->ia_valid &= ~(ATTR_UID | ATTR_GID);
2512 /* skip mode change if it's just for clearing setuid/setgid */
2513 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
2514 attrs->ia_valid &= ~ATTR_MODE;
2516 if (attrs->ia_valid & ATTR_MODE) {
2517 mode = attrs->ia_mode;
2519 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) ||
2520 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) {
2521 rc = id_mode_to_cifs_acl(inode, full_path, mode,
2522 INVALID_UID, INVALID_GID);
2524 cifs_dbg(FYI, "%s: Setting ACL failed with error: %d\n",
2526 goto cifs_setattr_exit;
2529 if (((mode & S_IWUGO) == 0) &&
2530 (cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
2532 dosattr = cifsInode->cifsAttrs | ATTR_READONLY;
2534 /* fix up mode if we're not using dynperm */
2535 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
2536 attrs->ia_mode = inode->i_mode & ~S_IWUGO;
2537 } else if ((mode & S_IWUGO) &&
2538 (cifsInode->cifsAttrs & ATTR_READONLY)) {
2540 dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
2541 /* Attributes of 0 are ignored */
2543 dosattr |= ATTR_NORMAL;
2545 /* reset local inode permissions to normal */
2546 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2547 attrs->ia_mode &= ~(S_IALLUGO);
2548 if (S_ISDIR(inode->i_mode))
2550 cifs_sb->mnt_dir_mode;
2553 cifs_sb->mnt_file_mode;
2555 } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2556 /* ignore mode change - ATTR_READONLY hasn't changed */
2557 attrs->ia_valid &= ~ATTR_MODE;
2561 if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) ||
2562 ((attrs->ia_valid & ATTR_MODE) && dosattr)) {
2563 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
2564 /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */
2566 /* Even if error on time set, no sense failing the call if
2567 the server would set the time to a reasonable value anyway,
2568 and this check ensures that we are not being called from
2569 sys_utimes in which case we ought to fail the call back to
2570 the user when the server rejects the call */
2571 if ((rc) && (attrs->ia_valid &
2572 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
2576 /* do not need local check to inode_check_ok since the server does
2579 goto cifs_setattr_exit;
2581 if ((attrs->ia_valid & ATTR_SIZE) &&
2582 attrs->ia_size != i_size_read(inode))
2583 truncate_setsize(inode, attrs->ia_size);
2585 setattr_copy(inode, attrs);
2586 mark_inode_dirty(inode);
2595 cifs_setattr(struct dentry *direntry, struct iattr *attrs)
2597 struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
2598 struct cifs_tcon *pTcon = cifs_sb_master_tcon(cifs_sb);
2600 if (pTcon->unix_ext)
2601 return cifs_setattr_unix(direntry, attrs);
2603 return cifs_setattr_nounix(direntry, attrs);
2605 /* BB: add cifs_setattr_legacy for really old servers */
2609 void cifs_delete_inode(struct inode *inode)
2611 cifs_dbg(FYI, "In cifs_delete_inode, inode = 0x%p\n", inode);
2612 /* may have to add back in if and when safe distributed caching of
2613 directories added e.g. via FindNotify */