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>
28 #include <linux/fiemap.h>
30 #include <asm/div64.h>
34 #include "cifsproto.h"
35 #include "smb2proto.h"
36 #include "cifs_debug.h"
37 #include "cifs_fs_sb.h"
38 #include "cifs_unicode.h"
42 static void cifs_set_ops(struct inode *inode)
44 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
46 switch (inode->i_mode & S_IFMT) {
48 inode->i_op = &cifs_file_inode_ops;
49 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
50 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
51 inode->i_fop = &cifs_file_direct_nobrl_ops;
53 inode->i_fop = &cifs_file_direct_ops;
54 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) {
55 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
56 inode->i_fop = &cifs_file_strict_nobrl_ops;
58 inode->i_fop = &cifs_file_strict_ops;
59 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
60 inode->i_fop = &cifs_file_nobrl_ops;
61 else { /* not direct, send byte range locks */
62 inode->i_fop = &cifs_file_ops;
65 /* check if server can support readpages */
66 if (cifs_sb_master_tcon(cifs_sb)->ses->server->max_read <
67 PAGE_SIZE + MAX_CIFS_HDR_SIZE)
68 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
70 inode->i_data.a_ops = &cifs_addr_ops;
73 #ifdef CONFIG_CIFS_DFS_UPCALL
74 if (IS_AUTOMOUNT(inode)) {
75 inode->i_op = &cifs_dfs_referral_inode_operations;
77 #else /* NO DFS support, treat as a directory */
80 inode->i_op = &cifs_dir_inode_ops;
81 inode->i_fop = &cifs_dir_ops;
85 inode->i_op = &cifs_symlink_inode_ops;
88 init_special_inode(inode, inode->i_mode, inode->i_rdev);
93 /* check inode attributes against fattr. If they don't match, tag the
94 * inode for cache invalidation
97 cifs_revalidate_cache(struct inode *inode, struct cifs_fattr *fattr)
99 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
101 cifs_dbg(FYI, "%s: revalidating inode %llu\n",
102 __func__, cifs_i->uniqueid);
104 if (inode->i_state & I_NEW) {
105 cifs_dbg(FYI, "%s: inode %llu is new\n",
106 __func__, cifs_i->uniqueid);
110 /* don't bother with revalidation if we have an oplock */
111 if (CIFS_CACHE_READ(cifs_i)) {
112 cifs_dbg(FYI, "%s: inode %llu is oplocked\n",
113 __func__, cifs_i->uniqueid);
117 /* revalidate if mtime or size have changed */
118 fattr->cf_mtime = timestamp_truncate(fattr->cf_mtime, inode);
119 if (timespec64_equal(&inode->i_mtime, &fattr->cf_mtime) &&
120 cifs_i->server_eof == fattr->cf_eof) {
121 cifs_dbg(FYI, "%s: inode %llu is unchanged\n",
122 __func__, cifs_i->uniqueid);
126 cifs_dbg(FYI, "%s: invalidating inode %llu mapping\n",
127 __func__, cifs_i->uniqueid);
128 set_bit(CIFS_INO_INVALID_MAPPING, &cifs_i->flags);
132 * copy nlink to the inode, unless it wasn't provided. Provide
133 * sane values if we don't have an existing one and none was provided
136 cifs_nlink_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr)
139 * if we're in a situation where we can't trust what we
140 * got from the server (readdir, some non-unix cases)
141 * fake reasonable values
143 if (fattr->cf_flags & CIFS_FATTR_UNKNOWN_NLINK) {
144 /* only provide fake values on a new inode */
145 if (inode->i_state & I_NEW) {
146 if (fattr->cf_cifsattrs & ATTR_DIRECTORY)
154 /* we trust the server, so update it */
155 set_nlink(inode, fattr->cf_nlink);
158 /* populate an inode with info from a cifs_fattr struct */
160 cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr)
162 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
163 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
165 cifs_revalidate_cache(inode, fattr);
167 spin_lock(&inode->i_lock);
168 fattr->cf_mtime = timestamp_truncate(fattr->cf_mtime, inode);
169 fattr->cf_atime = timestamp_truncate(fattr->cf_atime, inode);
170 fattr->cf_ctime = timestamp_truncate(fattr->cf_ctime, inode);
171 /* we do not want atime to be less than mtime, it broke some apps */
172 if (timespec64_compare(&fattr->cf_atime, &fattr->cf_mtime) < 0)
173 inode->i_atime = fattr->cf_mtime;
175 inode->i_atime = fattr->cf_atime;
176 inode->i_mtime = fattr->cf_mtime;
177 inode->i_ctime = fattr->cf_ctime;
178 inode->i_rdev = fattr->cf_rdev;
179 cifs_nlink_fattr_to_inode(inode, fattr);
180 inode->i_uid = fattr->cf_uid;
181 inode->i_gid = fattr->cf_gid;
183 /* if dynperm is set, don't clobber existing mode */
184 if (inode->i_state & I_NEW ||
185 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM))
186 inode->i_mode = fattr->cf_mode;
188 cifs_i->cifsAttrs = fattr->cf_cifsattrs;
190 if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL)
193 cifs_i->time = jiffies;
195 if (fattr->cf_flags & CIFS_FATTR_DELETE_PENDING)
196 set_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags);
198 clear_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags);
200 cifs_i->server_eof = fattr->cf_eof;
202 * Can't safely change the file size here if the client is writing to
203 * it due to potential races.
205 if (is_size_safe_to_change(cifs_i, fattr->cf_eof)) {
206 i_size_write(inode, fattr->cf_eof);
209 * i_blocks is not related to (i_size / i_blksize),
210 * but instead 512 byte (2**9) size is required for
211 * calculating num blocks.
213 inode->i_blocks = (512 - 1 + fattr->cf_bytes) >> 9;
215 spin_unlock(&inode->i_lock);
217 if (fattr->cf_flags & CIFS_FATTR_DFS_REFERRAL)
218 inode->i_flags |= S_AUTOMOUNT;
219 if (inode->i_state & I_NEW)
224 cifs_fill_uniqueid(struct super_block *sb, struct cifs_fattr *fattr)
226 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
228 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
231 fattr->cf_uniqueid = iunique(sb, ROOT_I);
234 /* Fill a cifs_fattr struct with info from FILE_UNIX_BASIC_INFO. */
236 cifs_unix_basic_to_fattr(struct cifs_fattr *fattr, FILE_UNIX_BASIC_INFO *info,
237 struct cifs_sb_info *cifs_sb)
239 memset(fattr, 0, sizeof(*fattr));
240 fattr->cf_uniqueid = le64_to_cpu(info->UniqueId);
241 fattr->cf_bytes = le64_to_cpu(info->NumOfBytes);
242 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
244 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
245 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastModificationTime);
246 fattr->cf_ctime = cifs_NTtimeToUnix(info->LastStatusChange);
247 /* old POSIX extensions don't get create time */
249 fattr->cf_mode = le64_to_cpu(info->Permissions);
252 * Since we set the inode type below we need to mask off
253 * to avoid strange results if bits set above.
255 fattr->cf_mode &= ~S_IFMT;
256 switch (le32_to_cpu(info->Type)) {
258 fattr->cf_mode |= S_IFREG;
259 fattr->cf_dtype = DT_REG;
262 fattr->cf_mode |= S_IFLNK;
263 fattr->cf_dtype = DT_LNK;
266 fattr->cf_mode |= S_IFDIR;
267 fattr->cf_dtype = DT_DIR;
270 fattr->cf_mode |= S_IFCHR;
271 fattr->cf_dtype = DT_CHR;
272 fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor),
273 le64_to_cpu(info->DevMinor) & MINORMASK);
276 fattr->cf_mode |= S_IFBLK;
277 fattr->cf_dtype = DT_BLK;
278 fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor),
279 le64_to_cpu(info->DevMinor) & MINORMASK);
282 fattr->cf_mode |= S_IFIFO;
283 fattr->cf_dtype = DT_FIFO;
286 fattr->cf_mode |= S_IFSOCK;
287 fattr->cf_dtype = DT_SOCK;
290 /* safest to call it a file if we do not know */
291 fattr->cf_mode |= S_IFREG;
292 fattr->cf_dtype = DT_REG;
293 cifs_dbg(FYI, "unknown type %d\n", le32_to_cpu(info->Type));
297 fattr->cf_uid = cifs_sb->mnt_uid;
298 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)) {
299 u64 id = le64_to_cpu(info->Uid);
300 if (id < ((uid_t)-1)) {
301 kuid_t uid = make_kuid(&init_user_ns, id);
307 fattr->cf_gid = cifs_sb->mnt_gid;
308 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)) {
309 u64 id = le64_to_cpu(info->Gid);
310 if (id < ((gid_t)-1)) {
311 kgid_t gid = make_kgid(&init_user_ns, id);
317 fattr->cf_nlink = le64_to_cpu(info->Nlinks);
321 * Fill a cifs_fattr struct with fake inode info.
323 * Needed to setup cifs_fattr data for the directory which is the
324 * junction to the new submount (ie to setup the fake directory
325 * which represents a DFS referral).
328 cifs_create_dfs_fattr(struct cifs_fattr *fattr, struct super_block *sb)
330 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
332 cifs_dbg(FYI, "creating fake fattr for DFS referral\n");
334 memset(fattr, 0, sizeof(*fattr));
335 fattr->cf_mode = S_IFDIR | S_IXUGO | S_IRWXU;
336 fattr->cf_uid = cifs_sb->mnt_uid;
337 fattr->cf_gid = cifs_sb->mnt_gid;
338 ktime_get_coarse_real_ts64(&fattr->cf_mtime);
339 fattr->cf_atime = fattr->cf_ctime = fattr->cf_mtime;
341 fattr->cf_flags = CIFS_FATTR_DFS_REFERRAL;
345 cifs_get_file_info_unix(struct file *filp)
349 FILE_UNIX_BASIC_INFO find_data;
350 struct cifs_fattr fattr;
351 struct inode *inode = file_inode(filp);
352 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
353 struct cifsFileInfo *cfile = filp->private_data;
354 struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
357 rc = CIFSSMBUnixQFileInfo(xid, tcon, cfile->fid.netfid, &find_data);
359 cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb);
360 } else if (rc == -EREMOTE) {
361 cifs_create_dfs_fattr(&fattr, inode->i_sb);
365 cifs_fattr_to_inode(inode, &fattr);
370 int cifs_get_inode_info_unix(struct inode **pinode,
371 const unsigned char *full_path,
372 struct super_block *sb, unsigned int xid)
375 FILE_UNIX_BASIC_INFO find_data;
376 struct cifs_fattr fattr;
377 struct cifs_tcon *tcon;
378 struct tcon_link *tlink;
379 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
381 cifs_dbg(FYI, "Getting info on %s\n", full_path);
383 tlink = cifs_sb_tlink(cifs_sb);
385 return PTR_ERR(tlink);
386 tcon = tlink_tcon(tlink);
388 /* could have done a find first instead but this returns more info */
389 rc = CIFSSMBUnixQPathInfo(xid, tcon, full_path, &find_data,
390 cifs_sb->local_nls, cifs_remap(cifs_sb));
391 cifs_put_tlink(tlink);
394 cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb);
395 } else if (rc == -EREMOTE) {
396 cifs_create_dfs_fattr(&fattr, sb);
402 /* check for Minshall+French symlinks */
403 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
404 int tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr,
407 cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc);
410 if (*pinode == NULL) {
412 cifs_fill_uniqueid(sb, &fattr);
413 *pinode = cifs_iget(sb, &fattr);
417 /* we already have inode, update it */
419 /* if uniqueid is different, return error */
420 if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM &&
421 CIFS_I(*pinode)->uniqueid != fattr.cf_uniqueid)) {
422 CIFS_I(*pinode)->time = 0; /* force reval */
427 /* if filetype is different, return error */
428 if (unlikely(((*pinode)->i_mode & S_IFMT) !=
429 (fattr.cf_mode & S_IFMT))) {
430 CIFS_I(*pinode)->time = 0; /* force reval */
435 cifs_fattr_to_inode(*pinode, &fattr);
443 cifs_sfu_type(struct cifs_fattr *fattr, const char *path,
444 struct cifs_sb_info *cifs_sb, unsigned int xid)
448 struct tcon_link *tlink;
449 struct cifs_tcon *tcon;
451 struct cifs_open_parms oparms;
452 struct cifs_io_parms io_parms = {0};
454 unsigned int bytes_read;
456 int buf_type = CIFS_NO_BUFFER;
460 fattr->cf_mode &= ~S_IFMT;
462 if (fattr->cf_eof == 0) {
463 fattr->cf_mode |= S_IFIFO;
464 fattr->cf_dtype = DT_FIFO;
466 } else if (fattr->cf_eof < 8) {
467 fattr->cf_mode |= S_IFREG;
468 fattr->cf_dtype = DT_REG;
469 return -EINVAL; /* EOPNOTSUPP? */
472 tlink = cifs_sb_tlink(cifs_sb);
474 return PTR_ERR(tlink);
475 tcon = tlink_tcon(tlink);
478 oparms.cifs_sb = cifs_sb;
479 oparms.desired_access = GENERIC_READ;
480 oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR);
481 oparms.disposition = FILE_OPEN;
484 oparms.reconnect = false;
486 if (tcon->ses->server->oplocks)
490 rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, NULL);
492 cifs_dbg(FYI, "check sfu type of %s, open rc = %d\n", path, rc);
493 cifs_put_tlink(tlink);
498 io_parms.netfid = fid.netfid;
499 io_parms.pid = current->tgid;
500 io_parms.tcon = tcon;
502 io_parms.length = 24;
504 rc = tcon->ses->server->ops->sync_read(xid, &fid, &io_parms,
505 &bytes_read, &pbuf, &buf_type);
506 if ((rc == 0) && (bytes_read >= 8)) {
507 if (memcmp("IntxBLK", pbuf, 8) == 0) {
508 cifs_dbg(FYI, "Block device\n");
509 fattr->cf_mode |= S_IFBLK;
510 fattr->cf_dtype = DT_BLK;
511 if (bytes_read == 24) {
512 /* we have enough to decode dev num */
513 __u64 mjr; /* major */
514 __u64 mnr; /* minor */
515 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
516 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
517 fattr->cf_rdev = MKDEV(mjr, mnr);
519 } else if (memcmp("IntxCHR", pbuf, 8) == 0) {
520 cifs_dbg(FYI, "Char device\n");
521 fattr->cf_mode |= S_IFCHR;
522 fattr->cf_dtype = DT_CHR;
523 if (bytes_read == 24) {
524 /* we have enough to decode dev num */
525 __u64 mjr; /* major */
526 __u64 mnr; /* minor */
527 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
528 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
529 fattr->cf_rdev = MKDEV(mjr, mnr);
531 } else if (memcmp("IntxLNK", pbuf, 7) == 0) {
532 cifs_dbg(FYI, "Symlink\n");
533 fattr->cf_mode |= S_IFLNK;
534 fattr->cf_dtype = DT_LNK;
536 fattr->cf_mode |= S_IFREG; /* file? */
537 fattr->cf_dtype = DT_REG;
541 fattr->cf_mode |= S_IFREG; /* then it is a file */
542 fattr->cf_dtype = DT_REG;
543 rc = -EOPNOTSUPP; /* or some unknown SFU type */
546 tcon->ses->server->ops->close(xid, tcon, &fid);
547 cifs_put_tlink(tlink);
551 #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
554 * Fetch mode bits as provided by SFU.
556 * FIXME: Doesn't this clobber the type bit we got from cifs_sfu_type ?
558 static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path,
559 struct cifs_sb_info *cifs_sb, unsigned int xid)
561 #ifdef CONFIG_CIFS_XATTR
565 struct tcon_link *tlink;
566 struct cifs_tcon *tcon;
568 tlink = cifs_sb_tlink(cifs_sb);
570 return PTR_ERR(tlink);
571 tcon = tlink_tcon(tlink);
573 if (tcon->ses->server->ops->query_all_EAs == NULL) {
574 cifs_put_tlink(tlink);
578 rc = tcon->ses->server->ops->query_all_EAs(xid, tcon, path,
579 "SETFILEBITS", ea_value, 4 /* size of buf */,
581 cifs_put_tlink(tlink);
585 mode = le32_to_cpu(*((__le32 *)ea_value));
586 fattr->cf_mode &= ~SFBITS_MASK;
587 cifs_dbg(FYI, "special bits 0%o org mode 0%o\n",
588 mode, fattr->cf_mode);
589 fattr->cf_mode = (mode & SFBITS_MASK) | fattr->cf_mode;
590 cifs_dbg(FYI, "special mode bits 0%o\n", mode);
599 /* Fill a cifs_fattr struct with info from POSIX info struct */
601 smb311_posix_info_to_fattr(struct cifs_fattr *fattr, struct smb311_posix_qinfo *info,
602 struct super_block *sb, bool adjust_tz, bool symlink)
604 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
605 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
607 memset(fattr, 0, sizeof(*fattr));
609 /* no fattr->flags to set */
610 fattr->cf_cifsattrs = le32_to_cpu(info->DosAttributes);
611 fattr->cf_uniqueid = le64_to_cpu(info->Inode);
613 if (info->LastAccessTime)
614 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
616 ktime_get_coarse_real_ts64(&fattr->cf_atime);
618 fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime);
619 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);
622 fattr->cf_ctime.tv_sec += tcon->ses->server->timeAdj;
623 fattr->cf_mtime.tv_sec += tcon->ses->server->timeAdj;
626 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
627 fattr->cf_bytes = le64_to_cpu(info->AllocationSize);
628 fattr->cf_createtime = le64_to_cpu(info->CreationTime);
630 fattr->cf_nlink = le32_to_cpu(info->HardLinks);
631 fattr->cf_mode = (umode_t) le32_to_cpu(info->Mode);
632 /* The srv fs device id is overridden on network mount so setting rdev isn't needed here */
633 /* fattr->cf_rdev = le32_to_cpu(info->DeviceId); */
636 fattr->cf_mode |= S_IFLNK;
637 fattr->cf_dtype = DT_LNK;
638 } else if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
639 fattr->cf_mode |= S_IFDIR;
640 fattr->cf_dtype = DT_DIR;
642 fattr->cf_mode |= S_IFREG;
643 fattr->cf_dtype = DT_REG;
645 /* else if reparse point ... TODO: add support for FIFO and blk dev; special file types */
647 fattr->cf_uid = cifs_sb->mnt_uid; /* TODO: map uid and gid from SID */
648 fattr->cf_gid = cifs_sb->mnt_gid;
650 cifs_dbg(FYI, "POSIX query info: mode 0x%x uniqueid 0x%llx nlink %d\n",
651 fattr->cf_mode, fattr->cf_uniqueid, fattr->cf_nlink);
655 /* Fill a cifs_fattr struct with info from FILE_ALL_INFO */
657 cifs_all_info_to_fattr(struct cifs_fattr *fattr, FILE_ALL_INFO *info,
658 struct super_block *sb, bool adjust_tz,
661 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
662 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
664 memset(fattr, 0, sizeof(*fattr));
665 fattr->cf_cifsattrs = le32_to_cpu(info->Attributes);
666 if (info->DeletePending)
667 fattr->cf_flags |= CIFS_FATTR_DELETE_PENDING;
669 if (info->LastAccessTime)
670 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
672 ktime_get_coarse_real_ts64(&fattr->cf_atime);
674 fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime);
675 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);
678 fattr->cf_ctime.tv_sec += tcon->ses->server->timeAdj;
679 fattr->cf_mtime.tv_sec += tcon->ses->server->timeAdj;
682 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
683 fattr->cf_bytes = le64_to_cpu(info->AllocationSize);
684 fattr->cf_createtime = le64_to_cpu(info->CreationTime);
686 fattr->cf_nlink = le32_to_cpu(info->NumberOfLinks);
689 fattr->cf_mode = S_IFLNK;
690 fattr->cf_dtype = DT_LNK;
691 } else if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
692 fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode;
693 fattr->cf_dtype = DT_DIR;
695 * Server can return wrong NumberOfLinks value for directories
696 * when Unix extensions are disabled - fake it.
699 fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK;
701 fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode;
702 fattr->cf_dtype = DT_REG;
704 /* clear write bits if ATTR_READONLY is set */
705 if (fattr->cf_cifsattrs & ATTR_READONLY)
706 fattr->cf_mode &= ~(S_IWUGO);
709 * Don't accept zero nlink from non-unix servers unless
710 * delete is pending. Instead mark it as unknown.
712 if ((fattr->cf_nlink < 1) && !tcon->unix_ext &&
713 !info->DeletePending) {
714 cifs_dbg(VFS, "bogus file nlink value %u\n",
716 fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK;
720 fattr->cf_uid = cifs_sb->mnt_uid;
721 fattr->cf_gid = cifs_sb->mnt_gid;
725 cifs_get_file_info(struct file *filp)
729 FILE_ALL_INFO find_data;
730 struct cifs_fattr fattr;
731 struct inode *inode = file_inode(filp);
732 struct cifsFileInfo *cfile = filp->private_data;
733 struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
734 struct TCP_Server_Info *server = tcon->ses->server;
736 if (!server->ops->query_file_info)
740 rc = server->ops->query_file_info(xid, tcon, &cfile->fid, &find_data);
743 cifs_all_info_to_fattr(&fattr, &find_data, inode->i_sb, false,
747 cifs_create_dfs_fattr(&fattr, inode->i_sb);
753 * FIXME: legacy server -- fall back to path-based call?
754 * for now, just skip revalidating and mark inode for
758 CIFS_I(inode)->time = 0;
764 * don't bother with SFU junk here -- just mark inode as needing
767 fattr.cf_uniqueid = CIFS_I(inode)->uniqueid;
768 fattr.cf_flags |= CIFS_FATTR_NEED_REVAL;
769 cifs_fattr_to_inode(inode, &fattr);
775 /* Simple function to return a 64 bit hash of string. Rarely called */
776 static __u64 simple_hashstr(const char *str)
778 const __u64 hash_mult = 1125899906842597ULL; /* a big enough prime */
782 hash = (hash + (__u64) *str++) * hash_mult;
788 * cifs_backup_query_path_info - SMB1 fallback code to get ino
790 * Fallback code to get file metadata when we don't have access to
791 * @full_path (EACCES) and have backup creds.
793 * @data will be set to search info result buffer
794 * @resp_buf will be set to cifs resp buf and needs to be freed with
795 * cifs_buf_release() when done with @data.
798 cifs_backup_query_path_info(int xid,
799 struct cifs_tcon *tcon,
800 struct super_block *sb,
801 const char *full_path,
803 FILE_ALL_INFO **data)
805 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
806 struct cifs_search_info info = {0};
811 info.endOfSearch = false;
813 info.info_level = SMB_FIND_FILE_UNIX;
814 else if ((tcon->ses->capabilities &
815 tcon->ses->server->vals->cap_nt_find) == 0)
816 info.info_level = SMB_FIND_FILE_INFO_STANDARD;
817 else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
818 info.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
819 else /* no srvino useful for fallback to some netapp */
820 info.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
822 flags = CIFS_SEARCH_CLOSE_ALWAYS |
823 CIFS_SEARCH_CLOSE_AT_END |
824 CIFS_SEARCH_BACKUP_SEARCH;
826 rc = CIFSFindFirst(xid, tcon, full_path,
827 cifs_sb, NULL, flags, &info, false);
831 *resp_buf = (void *)info.ntwrk_buf_start;
832 *data = (FILE_ALL_INFO *)info.srch_entries_start;
837 cifs_set_fattr_ino(int xid,
838 struct cifs_tcon *tcon,
839 struct super_block *sb,
840 struct inode **inode,
841 const char *full_path,
843 struct cifs_fattr *fattr)
845 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
846 struct TCP_Server_Info *server = tcon->ses->server;
849 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
851 fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid;
853 fattr->cf_uniqueid = iunique(sb, ROOT_I);
858 * If we have an inode pass a NULL tcon to ensure we don't
859 * make a round trip to the server. This only works for SMB2+.
861 rc = server->ops->get_srv_inum(xid,
862 *inode ? NULL : tcon,
868 * If that fails reuse existing ino or generate one
869 * and disable server ones
872 fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid;
874 fattr->cf_uniqueid = iunique(sb, ROOT_I);
875 cifs_autodisable_serverino(cifs_sb);
880 /* If no errors, check for zero root inode (invalid) */
881 if (fattr->cf_uniqueid == 0 && strlen(full_path) == 0) {
882 cifs_dbg(FYI, "Invalid (0) inodenum\n");
885 fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid;
887 /* make an ino by hashing the UNC */
888 fattr->cf_flags |= CIFS_FATTR_FAKE_ROOT_INO;
889 fattr->cf_uniqueid = simple_hashstr(tcon->treeName);
894 static inline bool is_inode_cache_good(struct inode *ino)
896 return ino && CIFS_CACHE_READ(CIFS_I(ino)) && CIFS_I(ino)->time != 0;
900 cifs_get_inode_info(struct inode **inode,
901 const char *full_path,
902 FILE_ALL_INFO *in_data,
903 struct super_block *sb, int xid,
904 const struct cifs_fid *fid)
907 struct cifs_tcon *tcon;
908 struct TCP_Server_Info *server;
909 struct tcon_link *tlink;
910 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
911 bool adjust_tz = false;
912 struct cifs_fattr fattr = {0};
913 bool symlink = false;
914 FILE_ALL_INFO *data = in_data;
915 FILE_ALL_INFO *tmp_data = NULL;
916 void *smb1_backup_rsp_buf = NULL;
920 tlink = cifs_sb_tlink(cifs_sb);
922 return PTR_ERR(tlink);
923 tcon = tlink_tcon(tlink);
924 server = tcon->ses->server;
927 * 1. Fetch file metadata if not provided (data)
931 if (is_inode_cache_good(*inode)) {
932 cifs_dbg(FYI, "No need to revalidate cached inode sizes\n");
935 tmp_data = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
940 rc = server->ops->query_path_info(xid, tcon, cifs_sb,
942 &adjust_tz, &symlink);
947 * 2. Convert it to internal cifs metadata (fattr)
952 cifs_all_info_to_fattr(&fattr, data, sb, adjust_tz, symlink);
955 /* DFS link, no metadata available on this server */
956 cifs_create_dfs_fattr(&fattr, sb);
961 * perm errors, try again with backup flags if possible
963 * For SMB2 and later the backup intent flag
964 * is already sent if needed on open and there
965 * is no path based FindFirst operation to use
968 if (backup_cred(cifs_sb) && is_smb1_server(server)) {
969 /* for easier reading */
970 FILE_DIRECTORY_INFO *fdi;
971 SEARCH_ID_FULL_DIR_INFO *si;
973 rc = cifs_backup_query_path_info(xid, tcon, sb,
975 &smb1_backup_rsp_buf,
980 fdi = (FILE_DIRECTORY_INFO *)data;
981 si = (SEARCH_ID_FULL_DIR_INFO *)data;
983 cifs_dir_info_to_fattr(&fattr, fdi, cifs_sb);
984 fattr.cf_uniqueid = le64_to_cpu(si->UniqueId);
985 /* uniqueid set, skip get inum step */
988 /* nothing we can do, bail out */
993 cifs_dbg(FYI, "%s: unhandled err rc %d\n", __func__, rc);
998 * 3. Get or update inode number (fattr.cf_uniqueid)
1001 cifs_set_fattr_ino(xid, tcon, sb, inode, full_path, data, &fattr);
1004 * 4. Tweak fattr based on mount options
1008 /* query for SFU type info if supported and needed */
1009 if (fattr.cf_cifsattrs & ATTR_SYSTEM &&
1010 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
1011 tmprc = cifs_sfu_type(&fattr, full_path, cifs_sb, xid);
1013 cifs_dbg(FYI, "cifs_sfu_type failed: %d\n", tmprc);
1016 /* fill in 0777 bits from ACL */
1017 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID) {
1018 rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, true,
1021 cifs_dbg(FYI, "%s: Get mode from SID failed. rc=%d\n",
1025 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
1026 rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, false,
1029 cifs_dbg(FYI, "%s: Getting ACL failed with error: %d\n",
1035 /* fill in remaining high mode bits e.g. SUID, VTX */
1036 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
1037 cifs_sfu_mode(&fattr, full_path, cifs_sb, xid);
1039 /* check for Minshall+French symlinks */
1040 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
1041 tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr,
1044 cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc);
1048 * 5. Update inode with final fattr data
1052 *inode = cifs_iget(sb, &fattr);
1056 /* we already have inode, update it */
1058 /* if uniqueid is different, return error */
1059 if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM &&
1060 CIFS_I(*inode)->uniqueid != fattr.cf_uniqueid)) {
1061 CIFS_I(*inode)->time = 0; /* force reval */
1066 /* if filetype is different, return error */
1067 if (unlikely(((*inode)->i_mode & S_IFMT) !=
1068 (fattr.cf_mode & S_IFMT))) {
1069 CIFS_I(*inode)->time = 0; /* force reval */
1074 cifs_fattr_to_inode(*inode, &fattr);
1077 cifs_buf_release(smb1_backup_rsp_buf);
1078 cifs_put_tlink(tlink);
1084 smb311_posix_get_inode_info(struct inode **inode,
1085 const char *full_path,
1086 struct super_block *sb, unsigned int xid)
1088 struct cifs_tcon *tcon;
1089 struct tcon_link *tlink;
1090 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1091 bool adjust_tz = false;
1092 struct cifs_fattr fattr = {0};
1093 bool symlink = false;
1094 struct smb311_posix_qinfo *data = NULL;
1098 tlink = cifs_sb_tlink(cifs_sb);
1100 return PTR_ERR(tlink);
1101 tcon = tlink_tcon(tlink);
1104 * 1. Fetch file metadata
1107 if (is_inode_cache_good(*inode)) {
1108 cifs_dbg(FYI, "No need to revalidate cached inode sizes\n");
1111 data = kmalloc(sizeof(struct smb311_posix_qinfo), GFP_KERNEL);
1117 rc = smb311_posix_query_path_info(xid, tcon, cifs_sb,
1119 &adjust_tz, &symlink);
1122 * 2. Convert it to internal cifs metadata (fattr)
1127 smb311_posix_info_to_fattr(&fattr, data, sb, adjust_tz, symlink);
1130 /* DFS link, no metadata available on this server */
1131 cifs_create_dfs_fattr(&fattr, sb);
1136 * For SMB2 and later the backup intent flag
1137 * is already sent if needed on open and there
1138 * is no path based FindFirst operation to use
1139 * to retry with so nothing we can do, bail out
1143 cifs_dbg(FYI, "%s: unhandled err rc %d\n", __func__, rc);
1149 * 3. Tweak fattr based on mount options
1152 /* check for Minshall+French symlinks */
1153 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
1154 tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr,
1157 cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc);
1161 * 4. Update inode with final fattr data
1165 *inode = cifs_iget(sb, &fattr);
1169 /* we already have inode, update it */
1171 /* if uniqueid is different, return error */
1172 if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM &&
1173 CIFS_I(*inode)->uniqueid != fattr.cf_uniqueid)) {
1174 CIFS_I(*inode)->time = 0; /* force reval */
1179 /* if filetype is different, return error */
1180 if (unlikely(((*inode)->i_mode & S_IFMT) !=
1181 (fattr.cf_mode & S_IFMT))) {
1182 CIFS_I(*inode)->time = 0; /* force reval */
1187 cifs_fattr_to_inode(*inode, &fattr);
1190 cifs_put_tlink(tlink);
1196 static const struct inode_operations cifs_ipc_inode_ops = {
1197 .lookup = cifs_lookup,
1201 cifs_find_inode(struct inode *inode, void *opaque)
1203 struct cifs_fattr *fattr = (struct cifs_fattr *) opaque;
1205 /* don't match inode with different uniqueid */
1206 if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid)
1209 /* use createtime like an i_generation field */
1210 if (CIFS_I(inode)->createtime != fattr->cf_createtime)
1213 /* don't match inode of different type */
1214 if ((inode->i_mode & S_IFMT) != (fattr->cf_mode & S_IFMT))
1217 /* if it's not a directory or has no dentries, then flag it */
1218 if (S_ISDIR(inode->i_mode) && !hlist_empty(&inode->i_dentry))
1219 fattr->cf_flags |= CIFS_FATTR_INO_COLLISION;
1225 cifs_init_inode(struct inode *inode, void *opaque)
1227 struct cifs_fattr *fattr = (struct cifs_fattr *) opaque;
1229 CIFS_I(inode)->uniqueid = fattr->cf_uniqueid;
1230 CIFS_I(inode)->createtime = fattr->cf_createtime;
1235 * walk dentry list for an inode and report whether it has aliases that
1236 * are hashed. We use this to determine if a directory inode can actually
1240 inode_has_hashed_dentries(struct inode *inode)
1242 struct dentry *dentry;
1244 spin_lock(&inode->i_lock);
1245 hlist_for_each_entry(dentry, &inode->i_dentry, d_u.d_alias) {
1246 if (!d_unhashed(dentry) || IS_ROOT(dentry)) {
1247 spin_unlock(&inode->i_lock);
1251 spin_unlock(&inode->i_lock);
1255 /* Given fattrs, get a corresponding inode */
1257 cifs_iget(struct super_block *sb, struct cifs_fattr *fattr)
1260 struct inode *inode;
1263 cifs_dbg(FYI, "looking for uniqueid=%llu\n", fattr->cf_uniqueid);
1265 /* hash down to 32-bits on 32-bit arch */
1266 hash = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid);
1268 inode = iget5_locked(sb, hash, cifs_find_inode, cifs_init_inode, fattr);
1270 /* was there a potentially problematic inode collision? */
1271 if (fattr->cf_flags & CIFS_FATTR_INO_COLLISION) {
1272 fattr->cf_flags &= ~CIFS_FATTR_INO_COLLISION;
1274 if (inode_has_hashed_dentries(inode)) {
1275 cifs_autodisable_serverino(CIFS_SB(sb));
1277 fattr->cf_uniqueid = iunique(sb, ROOT_I);
1278 goto retry_iget5_locked;
1282 cifs_fattr_to_inode(inode, fattr);
1283 if (sb->s_flags & SB_NOATIME)
1284 inode->i_flags |= S_NOATIME | S_NOCMTIME;
1285 if (inode->i_state & I_NEW) {
1286 inode->i_ino = hash;
1287 #ifdef CONFIG_CIFS_FSCACHE
1288 /* initialize per-inode cache cookie pointer */
1289 CIFS_I(inode)->fscache = NULL;
1291 unlock_new_inode(inode);
1298 /* gets root inode */
1299 struct inode *cifs_root_iget(struct super_block *sb)
1302 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1303 struct inode *inode = NULL;
1305 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
1309 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH)
1310 && cifs_sb->prepath) {
1311 len = strlen(cifs_sb->prepath);
1312 path = kzalloc(len + 2 /* leading sep + null */, GFP_KERNEL);
1314 return ERR_PTR(-ENOMEM);
1316 memcpy(path+1, cifs_sb->prepath, len);
1318 path = kstrdup("", GFP_KERNEL);
1320 return ERR_PTR(-ENOMEM);
1324 if (tcon->unix_ext) {
1325 rc = cifs_get_inode_info_unix(&inode, path, sb, xid);
1326 /* some servers mistakenly claim POSIX support */
1327 if (rc != -EOPNOTSUPP)
1329 cifs_dbg(VFS, "server does not support POSIX extensions\n");
1330 tcon->unix_ext = false;
1333 convert_delimiter(path, CIFS_DIR_SEP(cifs_sb));
1334 if (tcon->posix_extensions)
1335 rc = smb311_posix_get_inode_info(&inode, path, sb, xid);
1337 rc = cifs_get_inode_info(&inode, path, NULL, sb, xid, NULL);
1341 inode = ERR_PTR(rc);
1345 #ifdef CONFIG_CIFS_FSCACHE
1346 /* populate tcon->resource_id */
1347 tcon->resource_id = CIFS_I(inode)->uniqueid;
1350 if (rc && tcon->pipe) {
1351 cifs_dbg(FYI, "ipc connection - fake read inode\n");
1352 spin_lock(&inode->i_lock);
1353 inode->i_mode |= S_IFDIR;
1354 set_nlink(inode, 2);
1355 inode->i_op = &cifs_ipc_inode_ops;
1356 inode->i_fop = &simple_dir_operations;
1357 inode->i_uid = cifs_sb->mnt_uid;
1358 inode->i_gid = cifs_sb->mnt_gid;
1359 spin_unlock(&inode->i_lock);
1362 inode = ERR_PTR(rc);
1372 cifs_set_file_info(struct inode *inode, struct iattr *attrs, unsigned int xid,
1373 char *full_path, __u32 dosattr)
1375 bool set_time = false;
1376 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1377 struct TCP_Server_Info *server;
1378 FILE_BASIC_INFO info_buf;
1383 server = cifs_sb_master_tcon(cifs_sb)->ses->server;
1384 if (!server->ops->set_file_info)
1389 if (attrs->ia_valid & ATTR_ATIME) {
1391 info_buf.LastAccessTime =
1392 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1394 info_buf.LastAccessTime = 0;
1396 if (attrs->ia_valid & ATTR_MTIME) {
1398 info_buf.LastWriteTime =
1399 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1401 info_buf.LastWriteTime = 0;
1404 * Samba throws this field away, but windows may actually use it.
1405 * Do not set ctime unless other time stamps are changed explicitly
1406 * (i.e. by utimes()) since we would then have a mix of client and
1409 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1410 cifs_dbg(FYI, "CIFS - CTIME changed\n");
1411 info_buf.ChangeTime =
1412 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1414 info_buf.ChangeTime = 0;
1416 info_buf.CreationTime = 0; /* don't change */
1417 info_buf.Attributes = cpu_to_le32(dosattr);
1419 return server->ops->set_file_info(inode, full_path, &info_buf, xid);
1423 * Open the given file (if it isn't already), set the DELETE_ON_CLOSE bit
1424 * and rename it to a random name that hopefully won't conflict with
1428 cifs_rename_pending_delete(const char *full_path, struct dentry *dentry,
1429 const unsigned int xid)
1433 struct cifs_fid fid;
1434 struct cifs_open_parms oparms;
1435 struct inode *inode = d_inode(dentry);
1436 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1437 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1438 struct tcon_link *tlink;
1439 struct cifs_tcon *tcon;
1440 __u32 dosattr, origattr;
1441 FILE_BASIC_INFO *info_buf = NULL;
1443 tlink = cifs_sb_tlink(cifs_sb);
1445 return PTR_ERR(tlink);
1446 tcon = tlink_tcon(tlink);
1449 * We cannot rename the file if the server doesn't support
1450 * CAP_INFOLEVEL_PASSTHRU
1452 if (!(tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)) {
1458 oparms.cifs_sb = cifs_sb;
1459 oparms.desired_access = DELETE | FILE_WRITE_ATTRIBUTES;
1460 oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR);
1461 oparms.disposition = FILE_OPEN;
1462 oparms.path = full_path;
1464 oparms.reconnect = false;
1466 rc = CIFS_open(xid, &oparms, &oplock, NULL);
1470 origattr = cifsInode->cifsAttrs;
1472 origattr |= ATTR_NORMAL;
1474 dosattr = origattr & ~ATTR_READONLY;
1476 dosattr |= ATTR_NORMAL;
1477 dosattr |= ATTR_HIDDEN;
1479 /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */
1480 if (dosattr != origattr) {
1481 info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL);
1482 if (info_buf == NULL) {
1486 info_buf->Attributes = cpu_to_le32(dosattr);
1487 rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid,
1489 /* although we would like to mark the file hidden
1490 if that fails we will still try to rename it */
1492 cifsInode->cifsAttrs = dosattr;
1494 dosattr = origattr; /* since not able to change them */
1497 /* rename the file */
1498 rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, NULL,
1500 cifs_remap(cifs_sb));
1506 /* try to set DELETE_ON_CLOSE */
1507 if (!test_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags)) {
1508 rc = CIFSSMBSetFileDisposition(xid, tcon, true, fid.netfid,
1511 * some samba versions return -ENOENT when we try to set the
1512 * file disposition here. Likely a samba bug, but work around
1513 * it for now. This means that some cifsXXX files may hang
1514 * around after they shouldn't.
1516 * BB: remove this hack after more servers have the fix
1524 set_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags);
1528 CIFSSMBClose(xid, tcon, fid.netfid);
1531 cifs_put_tlink(tlink);
1535 * reset everything back to the original state. Don't bother
1536 * dealing with errors here since we can't do anything about
1540 CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, dentry->d_name.name,
1541 cifs_sb->local_nls, cifs_remap(cifs_sb));
1543 if (dosattr != origattr) {
1544 info_buf->Attributes = cpu_to_le32(origattr);
1545 if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid,
1547 cifsInode->cifsAttrs = origattr;
1553 /* copied from fs/nfs/dir.c with small changes */
1555 cifs_drop_nlink(struct inode *inode)
1557 spin_lock(&inode->i_lock);
1558 if (inode->i_nlink > 0)
1560 spin_unlock(&inode->i_lock);
1564 * If d_inode(dentry) is null (usually meaning the cached dentry
1565 * is a negative dentry) then we would attempt a standard SMB delete, but
1566 * if that fails we can not attempt the fall back mechanisms on EACCES
1567 * but will return the EACCES to the caller. Note that the VFS does not call
1568 * unlink on negative dentries currently.
1570 int cifs_unlink(struct inode *dir, struct dentry *dentry)
1574 char *full_path = NULL;
1575 struct inode *inode = d_inode(dentry);
1576 struct cifsInodeInfo *cifs_inode;
1577 struct super_block *sb = dir->i_sb;
1578 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1579 struct tcon_link *tlink;
1580 struct cifs_tcon *tcon;
1581 struct TCP_Server_Info *server;
1582 struct iattr *attrs = NULL;
1583 __u32 dosattr = 0, origattr = 0;
1585 cifs_dbg(FYI, "cifs_unlink, dir=0x%p, dentry=0x%p\n", dir, dentry);
1587 tlink = cifs_sb_tlink(cifs_sb);
1589 return PTR_ERR(tlink);
1590 tcon = tlink_tcon(tlink);
1591 server = tcon->ses->server;
1595 if (tcon->nodelete) {
1600 /* Unlink can be called from rename so we can not take the
1601 * sb->s_vfs_rename_mutex here */
1602 full_path = build_path_from_dentry(dentry);
1603 if (full_path == NULL) {
1608 if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1609 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1610 rc = CIFSPOSIXDelFile(xid, tcon, full_path,
1611 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
1612 cifs_remap(cifs_sb));
1613 cifs_dbg(FYI, "posix del rc %d\n", rc);
1614 if ((rc == 0) || (rc == -ENOENT))
1615 goto psx_del_no_retry;
1619 if (!server->ops->unlink) {
1621 goto psx_del_no_retry;
1624 rc = server->ops->unlink(xid, tcon, full_path, cifs_sb);
1629 cifs_drop_nlink(inode);
1630 } else if (rc == -ENOENT) {
1632 } else if (rc == -EBUSY) {
1633 if (server->ops->rename_pending_delete) {
1634 rc = server->ops->rename_pending_delete(full_path,
1637 cifs_drop_nlink(inode);
1639 } else if ((rc == -EACCES) && (dosattr == 0) && inode) {
1640 attrs = kzalloc(sizeof(*attrs), GFP_KERNEL);
1641 if (attrs == NULL) {
1646 /* try to reset dos attributes */
1647 cifs_inode = CIFS_I(inode);
1648 origattr = cifs_inode->cifsAttrs;
1650 origattr |= ATTR_NORMAL;
1651 dosattr = origattr & ~ATTR_READONLY;
1653 dosattr |= ATTR_NORMAL;
1654 dosattr |= ATTR_HIDDEN;
1656 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
1660 goto retry_std_delete;
1663 /* undo the setattr if we errored out and it's needed */
1664 if (rc != 0 && dosattr != 0)
1665 cifs_set_file_info(inode, attrs, xid, full_path, origattr);
1669 cifs_inode = CIFS_I(inode);
1670 cifs_inode->time = 0; /* will force revalidate to get info
1672 inode->i_ctime = current_time(inode);
1674 dir->i_ctime = dir->i_mtime = current_time(dir);
1675 cifs_inode = CIFS_I(dir);
1676 CIFS_I(dir)->time = 0; /* force revalidate of dir as well */
1681 cifs_put_tlink(tlink);
1686 cifs_mkdir_qinfo(struct inode *parent, struct dentry *dentry, umode_t mode,
1687 const char *full_path, struct cifs_sb_info *cifs_sb,
1688 struct cifs_tcon *tcon, const unsigned int xid)
1691 struct inode *inode = NULL;
1693 if (tcon->posix_extensions)
1694 rc = smb311_posix_get_inode_info(&inode, full_path, parent->i_sb, xid);
1695 else if (tcon->unix_ext)
1696 rc = cifs_get_inode_info_unix(&inode, full_path, parent->i_sb,
1699 rc = cifs_get_inode_info(&inode, full_path, NULL, parent->i_sb,
1706 * setting nlink not necessary except in cases where we failed to get it
1707 * from the server or was set bogus. Also, since this is a brand new
1708 * inode, no need to grab the i_lock before setting the i_nlink.
1710 if (inode->i_nlink < 2)
1711 set_nlink(inode, 2);
1712 mode &= ~current_umask();
1713 /* must turn on setgid bit if parent dir has it */
1714 if (parent->i_mode & S_ISGID)
1717 if (tcon->unix_ext) {
1718 struct cifs_unix_set_info_args args = {
1720 .ctime = NO_CHANGE_64,
1721 .atime = NO_CHANGE_64,
1722 .mtime = NO_CHANGE_64,
1725 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1726 args.uid = current_fsuid();
1727 if (parent->i_mode & S_ISGID)
1728 args.gid = parent->i_gid;
1730 args.gid = current_fsgid();
1732 args.uid = INVALID_UID; /* no change */
1733 args.gid = INVALID_GID; /* no change */
1735 CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args,
1737 cifs_remap(cifs_sb));
1739 struct TCP_Server_Info *server = tcon->ses->server;
1740 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
1741 (mode & S_IWUGO) == 0 && server->ops->mkdir_setinfo)
1742 server->ops->mkdir_setinfo(inode, full_path, cifs_sb,
1744 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
1745 inode->i_mode = (mode | S_IFDIR);
1747 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1748 inode->i_uid = current_fsuid();
1749 if (inode->i_mode & S_ISGID)
1750 inode->i_gid = parent->i_gid;
1752 inode->i_gid = current_fsgid();
1755 d_instantiate(dentry, inode);
1760 cifs_posix_mkdir(struct inode *inode, struct dentry *dentry, umode_t mode,
1761 const char *full_path, struct cifs_sb_info *cifs_sb,
1762 struct cifs_tcon *tcon, const unsigned int xid)
1766 FILE_UNIX_BASIC_INFO *info = NULL;
1767 struct inode *newinode = NULL;
1768 struct cifs_fattr fattr;
1770 info = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1773 goto posix_mkdir_out;
1776 mode &= ~current_umask();
1777 rc = CIFSPOSIXCreate(xid, tcon, SMB_O_DIRECTORY | SMB_O_CREAT, mode,
1778 NULL /* netfid */, info, &oplock, full_path,
1779 cifs_sb->local_nls, cifs_remap(cifs_sb));
1780 if (rc == -EOPNOTSUPP)
1781 goto posix_mkdir_out;
1783 cifs_dbg(FYI, "posix mkdir returned 0x%x\n", rc);
1785 goto posix_mkdir_out;
1788 if (info->Type == cpu_to_le32(-1))
1789 /* no return info, go query for it */
1790 goto posix_mkdir_get_info;
1792 * BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if
1793 * need to set uid/gid.
1796 cifs_unix_basic_to_fattr(&fattr, info, cifs_sb);
1797 cifs_fill_uniqueid(inode->i_sb, &fattr);
1798 newinode = cifs_iget(inode->i_sb, &fattr);
1800 goto posix_mkdir_get_info;
1802 d_instantiate(dentry, newinode);
1804 #ifdef CONFIG_CIFS_DEBUG2
1805 cifs_dbg(FYI, "instantiated dentry %p %pd to inode %p\n",
1806 dentry, dentry, newinode);
1808 if (newinode->i_nlink != 2)
1809 cifs_dbg(FYI, "unexpected number of links %d\n",
1816 posix_mkdir_get_info:
1817 rc = cifs_mkdir_qinfo(inode, dentry, mode, full_path, cifs_sb, tcon,
1819 goto posix_mkdir_out;
1822 int cifs_mkdir(struct inode *inode, struct dentry *direntry, umode_t mode)
1826 struct cifs_sb_info *cifs_sb;
1827 struct tcon_link *tlink;
1828 struct cifs_tcon *tcon;
1829 struct TCP_Server_Info *server;
1832 cifs_dbg(FYI, "In cifs_mkdir, mode = %04ho inode = 0x%p\n",
1835 cifs_sb = CIFS_SB(inode->i_sb);
1836 tlink = cifs_sb_tlink(cifs_sb);
1838 return PTR_ERR(tlink);
1839 tcon = tlink_tcon(tlink);
1843 full_path = build_path_from_dentry(direntry);
1844 if (full_path == NULL) {
1849 server = tcon->ses->server;
1851 if ((server->ops->posix_mkdir) && (tcon->posix_extensions)) {
1852 rc = server->ops->posix_mkdir(xid, inode, mode, tcon, full_path,
1854 d_drop(direntry); /* for time being always refresh inode info */
1858 if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1859 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1860 rc = cifs_posix_mkdir(inode, direntry, mode, full_path, cifs_sb,
1862 if (rc != -EOPNOTSUPP)
1866 if (!server->ops->mkdir) {
1871 /* BB add setting the equivalent of mode via CreateX w/ACLs */
1872 rc = server->ops->mkdir(xid, inode, mode, tcon, full_path, cifs_sb);
1874 cifs_dbg(FYI, "cifs_mkdir returned 0x%x\n", rc);
1879 /* TODO: skip this for smb2/smb3 */
1880 rc = cifs_mkdir_qinfo(inode, direntry, mode, full_path, cifs_sb, tcon,
1884 * Force revalidate to get parent dir info when needed since cached
1885 * attributes are invalid now.
1887 CIFS_I(inode)->time = 0;
1890 cifs_put_tlink(tlink);
1894 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1898 struct cifs_sb_info *cifs_sb;
1899 struct tcon_link *tlink;
1900 struct cifs_tcon *tcon;
1901 struct TCP_Server_Info *server;
1902 char *full_path = NULL;
1903 struct cifsInodeInfo *cifsInode;
1905 cifs_dbg(FYI, "cifs_rmdir, inode = 0x%p\n", inode);
1909 full_path = build_path_from_dentry(direntry);
1910 if (full_path == NULL) {
1915 cifs_sb = CIFS_SB(inode->i_sb);
1916 tlink = cifs_sb_tlink(cifs_sb);
1917 if (IS_ERR(tlink)) {
1918 rc = PTR_ERR(tlink);
1921 tcon = tlink_tcon(tlink);
1922 server = tcon->ses->server;
1924 if (!server->ops->rmdir) {
1926 cifs_put_tlink(tlink);
1930 if (tcon->nodelete) {
1932 cifs_put_tlink(tlink);
1936 rc = server->ops->rmdir(xid, tcon, full_path, cifs_sb);
1937 cifs_put_tlink(tlink);
1940 spin_lock(&d_inode(direntry)->i_lock);
1941 i_size_write(d_inode(direntry), 0);
1942 clear_nlink(d_inode(direntry));
1943 spin_unlock(&d_inode(direntry)->i_lock);
1946 cifsInode = CIFS_I(d_inode(direntry));
1947 /* force revalidate to go get info when needed */
1948 cifsInode->time = 0;
1950 cifsInode = CIFS_I(inode);
1952 * Force revalidate to get parent dir info when needed since cached
1953 * attributes are invalid now.
1955 cifsInode->time = 0;
1957 d_inode(direntry)->i_ctime = inode->i_ctime = inode->i_mtime =
1958 current_time(inode);
1967 cifs_do_rename(const unsigned int xid, struct dentry *from_dentry,
1968 const char *from_path, struct dentry *to_dentry,
1969 const char *to_path)
1971 struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb);
1972 struct tcon_link *tlink;
1973 struct cifs_tcon *tcon;
1974 struct TCP_Server_Info *server;
1975 struct cifs_fid fid;
1976 struct cifs_open_parms oparms;
1979 tlink = cifs_sb_tlink(cifs_sb);
1981 return PTR_ERR(tlink);
1982 tcon = tlink_tcon(tlink);
1983 server = tcon->ses->server;
1985 if (!server->ops->rename)
1988 /* try path-based rename first */
1989 rc = server->ops->rename(xid, tcon, from_path, to_path, cifs_sb);
1992 * Don't bother with rename by filehandle unless file is busy and
1993 * source. Note that cross directory moves do not work with
1994 * rename by filehandle to various Windows servers.
1996 if (rc == 0 || rc != -EBUSY)
1997 goto do_rename_exit;
1999 /* Don't fall back to using SMB on SMB 2+ mount */
2000 if (server->vals->protocol_id != 0)
2001 goto do_rename_exit;
2003 /* open-file renames don't work across directories */
2004 if (to_dentry->d_parent != from_dentry->d_parent)
2005 goto do_rename_exit;
2008 oparms.cifs_sb = cifs_sb;
2009 /* open the file to be renamed -- we need DELETE perms */
2010 oparms.desired_access = DELETE;
2011 oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR);
2012 oparms.disposition = FILE_OPEN;
2013 oparms.path = from_path;
2015 oparms.reconnect = false;
2017 rc = CIFS_open(xid, &oparms, &oplock, NULL);
2019 rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid,
2020 (const char *) to_dentry->d_name.name,
2021 cifs_sb->local_nls, cifs_remap(cifs_sb));
2022 CIFSSMBClose(xid, tcon, fid.netfid);
2026 d_move(from_dentry, to_dentry);
2027 cifs_put_tlink(tlink);
2032 cifs_rename2(struct inode *source_dir, struct dentry *source_dentry,
2033 struct inode *target_dir, struct dentry *target_dentry,
2036 char *from_name = NULL;
2037 char *to_name = NULL;
2038 struct cifs_sb_info *cifs_sb;
2039 struct tcon_link *tlink;
2040 struct cifs_tcon *tcon;
2041 FILE_UNIX_BASIC_INFO *info_buf_source = NULL;
2042 FILE_UNIX_BASIC_INFO *info_buf_target;
2046 if (flags & ~RENAME_NOREPLACE)
2049 cifs_sb = CIFS_SB(source_dir->i_sb);
2050 tlink = cifs_sb_tlink(cifs_sb);
2052 return PTR_ERR(tlink);
2053 tcon = tlink_tcon(tlink);
2058 * we already have the rename sem so we do not need to
2059 * grab it again here to protect the path integrity
2061 from_name = build_path_from_dentry(source_dentry);
2062 if (from_name == NULL) {
2064 goto cifs_rename_exit;
2067 to_name = build_path_from_dentry(target_dentry);
2068 if (to_name == NULL) {
2070 goto cifs_rename_exit;
2073 rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry,
2077 * No-replace is the natural behavior for CIFS, so skip unlink hacks.
2079 if (flags & RENAME_NOREPLACE)
2080 goto cifs_rename_exit;
2082 if (rc == -EEXIST && tcon->unix_ext) {
2084 * Are src and dst hardlinks of same inode? We can only tell
2085 * with unix extensions enabled.
2088 kmalloc_array(2, sizeof(FILE_UNIX_BASIC_INFO),
2090 if (info_buf_source == NULL) {
2092 goto cifs_rename_exit;
2095 info_buf_target = info_buf_source + 1;
2096 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, from_name,
2099 cifs_remap(cifs_sb));
2103 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, to_name,
2106 cifs_remap(cifs_sb));
2108 if (tmprc == 0 && (info_buf_source->UniqueId ==
2109 info_buf_target->UniqueId)) {
2110 /* same file, POSIX says that this is a noop */
2112 goto cifs_rename_exit;
2116 * else ... BB we could add the same check for Windows by
2117 * checking the UniqueId via FILE_INTERNAL_INFO
2121 /* Try unlinking the target dentry if it's not negative */
2122 if (d_really_is_positive(target_dentry) && (rc == -EACCES || rc == -EEXIST)) {
2123 if (d_is_dir(target_dentry))
2124 tmprc = cifs_rmdir(target_dir, target_dentry);
2126 tmprc = cifs_unlink(target_dir, target_dentry);
2128 goto cifs_rename_exit;
2129 rc = cifs_do_rename(xid, source_dentry, from_name,
2130 target_dentry, to_name);
2133 /* force revalidate to go get info when needed */
2134 CIFS_I(source_dir)->time = CIFS_I(target_dir)->time = 0;
2136 source_dir->i_ctime = source_dir->i_mtime = target_dir->i_ctime =
2137 target_dir->i_mtime = current_time(source_dir);
2140 kfree(info_buf_source);
2144 cifs_put_tlink(tlink);
2149 cifs_inode_needs_reval(struct inode *inode)
2151 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2152 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2154 if (cifs_i->time == 0)
2157 if (CIFS_CACHE_READ(cifs_i))
2160 if (!lookupCacheEnabled)
2163 if (!cifs_sb->actimeo)
2166 if (!time_in_range(jiffies, cifs_i->time,
2167 cifs_i->time + cifs_sb->actimeo))
2170 /* hardlinked files w/ noserverino get "special" treatment */
2171 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) &&
2172 S_ISREG(inode->i_mode) && inode->i_nlink != 1)
2179 * Zap the cache. Called when invalid_mapping flag is set.
2182 cifs_invalidate_mapping(struct inode *inode)
2186 if (inode->i_mapping && inode->i_mapping->nrpages != 0) {
2187 rc = invalidate_inode_pages2(inode->i_mapping);
2189 cifs_dbg(VFS, "%s: Could not invalidate inode %p\n",
2193 cifs_fscache_reset_inode_cookie(inode);
2198 * cifs_wait_bit_killable - helper for functions that are sleeping on bit locks
2199 * @word: long word containing the bit lock
2202 cifs_wait_bit_killable(struct wait_bit_key *key, int mode)
2204 freezable_schedule_unsafe();
2205 if (signal_pending_state(mode, current))
2206 return -ERESTARTSYS;
2211 cifs_revalidate_mapping(struct inode *inode)
2214 unsigned long *flags = &CIFS_I(inode)->flags;
2216 /* swapfiles are not supposed to be shared */
2217 if (IS_SWAPFILE(inode))
2220 rc = wait_on_bit_lock_action(flags, CIFS_INO_LOCK, cifs_wait_bit_killable,
2225 if (test_and_clear_bit(CIFS_INO_INVALID_MAPPING, flags)) {
2226 rc = cifs_invalidate_mapping(inode);
2228 set_bit(CIFS_INO_INVALID_MAPPING, flags);
2231 clear_bit_unlock(CIFS_INO_LOCK, flags);
2232 smp_mb__after_atomic();
2233 wake_up_bit(flags, CIFS_INO_LOCK);
2239 cifs_zap_mapping(struct inode *inode)
2241 set_bit(CIFS_INO_INVALID_MAPPING, &CIFS_I(inode)->flags);
2242 return cifs_revalidate_mapping(inode);
2245 int cifs_revalidate_file_attr(struct file *filp)
2248 struct inode *inode = file_inode(filp);
2249 struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data;
2251 if (!cifs_inode_needs_reval(inode))
2254 if (tlink_tcon(cfile->tlink)->unix_ext)
2255 rc = cifs_get_file_info_unix(filp);
2257 rc = cifs_get_file_info(filp);
2262 int cifs_revalidate_dentry_attr(struct dentry *dentry)
2266 struct inode *inode = d_inode(dentry);
2267 struct super_block *sb = dentry->d_sb;
2268 char *full_path = NULL;
2274 if (!cifs_inode_needs_reval(inode))
2279 /* can not safely grab the rename sem here if rename calls revalidate
2280 since that would deadlock */
2281 full_path = build_path_from_dentry(dentry);
2282 if (full_path == NULL) {
2287 cifs_dbg(FYI, "Update attributes: %s inode 0x%p count %d dentry: 0x%p d_time %ld jiffies %ld\n",
2288 full_path, inode, inode->i_count.counter,
2289 dentry, cifs_get_time(dentry), jiffies);
2292 if (cifs_sb_master_tcon(CIFS_SB(sb))->posix_extensions)
2293 rc = smb311_posix_get_inode_info(&inode, full_path, sb, xid);
2294 else if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext)
2295 rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid);
2297 rc = cifs_get_inode_info(&inode, full_path, NULL, sb,
2299 if (rc == -EAGAIN && count++ < 10)
2308 int cifs_revalidate_file(struct file *filp)
2311 struct inode *inode = file_inode(filp);
2313 rc = cifs_revalidate_file_attr(filp);
2317 return cifs_revalidate_mapping(inode);
2320 /* revalidate a dentry's inode attributes */
2321 int cifs_revalidate_dentry(struct dentry *dentry)
2324 struct inode *inode = d_inode(dentry);
2326 rc = cifs_revalidate_dentry_attr(dentry);
2330 return cifs_revalidate_mapping(inode);
2333 int cifs_getattr(const struct path *path, struct kstat *stat,
2334 u32 request_mask, unsigned int flags)
2336 struct dentry *dentry = path->dentry;
2337 struct cifs_sb_info *cifs_sb = CIFS_SB(dentry->d_sb);
2338 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
2339 struct inode *inode = d_inode(dentry);
2343 * We need to be sure that all dirty pages are written and the server
2344 * has actual ctime, mtime and file length.
2346 if ((request_mask & (STATX_CTIME | STATX_MTIME | STATX_SIZE)) &&
2347 !CIFS_CACHE_READ(CIFS_I(inode)) &&
2348 inode->i_mapping && inode->i_mapping->nrpages != 0) {
2349 rc = filemap_fdatawait(inode->i_mapping);
2351 mapping_set_error(inode->i_mapping, rc);
2356 if ((flags & AT_STATX_SYNC_TYPE) == AT_STATX_FORCE_SYNC)
2357 CIFS_I(inode)->time = 0; /* force revalidate */
2360 * If the caller doesn't require syncing, only sync if
2361 * necessary (e.g. due to earlier truncate or setattr
2362 * invalidating the cached metadata)
2364 if (((flags & AT_STATX_SYNC_TYPE) != AT_STATX_DONT_SYNC) ||
2365 (CIFS_I(inode)->time == 0)) {
2366 rc = cifs_revalidate_dentry_attr(dentry);
2371 generic_fillattr(inode, stat);
2372 stat->blksize = cifs_sb->bsize;
2373 stat->ino = CIFS_I(inode)->uniqueid;
2375 /* old CIFS Unix Extensions doesn't return create time */
2376 if (CIFS_I(inode)->createtime) {
2377 stat->result_mask |= STATX_BTIME;
2379 cifs_NTtimeToUnix(cpu_to_le64(CIFS_I(inode)->createtime));
2382 stat->attributes_mask |= (STATX_ATTR_COMPRESSED | STATX_ATTR_ENCRYPTED);
2383 if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_COMPRESSED)
2384 stat->attributes |= STATX_ATTR_COMPRESSED;
2385 if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_ENCRYPTED)
2386 stat->attributes |= STATX_ATTR_ENCRYPTED;
2389 * If on a multiuser mount without unix extensions or cifsacl being
2390 * enabled, and the admin hasn't overridden them, set the ownership
2391 * to the fsuid/fsgid of the current process.
2393 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) &&
2394 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
2396 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID))
2397 stat->uid = current_fsuid();
2398 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID))
2399 stat->gid = current_fsgid();
2404 int cifs_fiemap(struct inode *inode, struct fiemap_extent_info *fei, u64 start,
2407 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2408 struct cifs_sb_info *cifs_sb = CIFS_SB(cifs_i->vfs_inode.i_sb);
2409 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
2410 struct TCP_Server_Info *server = tcon->ses->server;
2411 struct cifsFileInfo *cfile;
2415 * We need to be sure that all dirty pages are written as they
2416 * might fill holes on the server.
2418 if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
2419 inode->i_mapping->nrpages != 0) {
2420 rc = filemap_fdatawait(inode->i_mapping);
2422 mapping_set_error(inode->i_mapping, rc);
2427 cfile = find_readable_file(cifs_i, false);
2431 if (server->ops->fiemap) {
2432 rc = server->ops->fiemap(tcon, cfile, fei, start, len);
2433 cifsFileInfo_put(cfile);
2437 cifsFileInfo_put(cfile);
2441 int cifs_truncate_page(struct address_space *mapping, loff_t from)
2443 pgoff_t index = from >> PAGE_SHIFT;
2444 unsigned offset = from & (PAGE_SIZE - 1);
2448 page = grab_cache_page(mapping, index);
2452 zero_user_segment(page, offset, PAGE_SIZE);
2458 void cifs_setsize(struct inode *inode, loff_t offset)
2460 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2462 spin_lock(&inode->i_lock);
2463 i_size_write(inode, offset);
2464 spin_unlock(&inode->i_lock);
2466 /* Cached inode must be refreshed on truncate */
2468 truncate_pagecache(inode, offset);
2472 cifs_set_file_size(struct inode *inode, struct iattr *attrs,
2473 unsigned int xid, char *full_path)
2476 struct cifsFileInfo *open_file;
2477 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2478 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2479 struct tcon_link *tlink = NULL;
2480 struct cifs_tcon *tcon = NULL;
2481 struct TCP_Server_Info *server;
2484 * To avoid spurious oplock breaks from server, in the case of
2485 * inodes that we already have open, avoid doing path based
2486 * setting of file size if we can do it by handle.
2487 * This keeps our caching token (oplock) and avoids timeouts
2488 * when the local oplock break takes longer to flush
2489 * writebehind data than the SMB timeout for the SetPathInfo
2490 * request would allow
2492 open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY);
2494 tcon = tlink_tcon(open_file->tlink);
2495 server = tcon->ses->server;
2496 if (server->ops->set_file_size)
2497 rc = server->ops->set_file_size(xid, tcon, open_file,
2498 attrs->ia_size, false);
2501 cifsFileInfo_put(open_file);
2502 cifs_dbg(FYI, "SetFSize for attrs rc = %d\n", rc);
2510 tlink = cifs_sb_tlink(cifs_sb);
2512 return PTR_ERR(tlink);
2513 tcon = tlink_tcon(tlink);
2514 server = tcon->ses->server;
2518 * Set file size by pathname rather than by handle either because no
2519 * valid, writeable file handle for it was found or because there was
2520 * an error setting it by handle.
2522 if (server->ops->set_path_size)
2523 rc = server->ops->set_path_size(xid, tcon, full_path,
2524 attrs->ia_size, cifs_sb, false);
2527 cifs_dbg(FYI, "SetEOF by path (setattrs) rc = %d\n", rc);
2530 cifs_put_tlink(tlink);
2534 cifsInode->server_eof = attrs->ia_size;
2535 cifs_setsize(inode, attrs->ia_size);
2538 * The man page of truncate says if the size changed,
2539 * then the st_ctime and st_mtime fields for the file
2542 attrs->ia_ctime = attrs->ia_mtime = current_time(inode);
2543 attrs->ia_valid |= ATTR_CTIME | ATTR_MTIME;
2545 cifs_truncate_page(inode->i_mapping, inode->i_size);
2552 cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
2556 char *full_path = NULL;
2557 struct inode *inode = d_inode(direntry);
2558 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2559 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2560 struct tcon_link *tlink;
2561 struct cifs_tcon *pTcon;
2562 struct cifs_unix_set_info_args *args = NULL;
2563 struct cifsFileInfo *open_file;
2565 cifs_dbg(FYI, "setattr_unix on file %pd attrs->ia_valid=0x%x\n",
2566 direntry, attrs->ia_valid);
2570 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
2571 attrs->ia_valid |= ATTR_FORCE;
2573 rc = setattr_prepare(direntry, attrs);
2577 full_path = build_path_from_dentry(direntry);
2578 if (full_path == NULL) {
2584 * Attempt to flush data before changing attributes. We need to do
2585 * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the
2586 * ownership or mode then we may also need to do this. Here, we take
2587 * the safe way out and just do the flush on all setattr requests. If
2588 * the flush returns error, store it to report later and continue.
2590 * BB: This should be smarter. Why bother flushing pages that
2591 * will be truncated anyway? Also, should we error out here if
2592 * the flush returns error?
2594 rc = filemap_write_and_wait(inode->i_mapping);
2595 if (is_interrupt_error(rc)) {
2600 mapping_set_error(inode->i_mapping, rc);
2603 if (attrs->ia_valid & ATTR_SIZE) {
2604 rc = cifs_set_file_size(inode, attrs, xid, full_path);
2609 /* skip mode change if it's just for clearing setuid/setgid */
2610 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
2611 attrs->ia_valid &= ~ATTR_MODE;
2613 args = kmalloc(sizeof(*args), GFP_KERNEL);
2619 /* set up the struct */
2620 if (attrs->ia_valid & ATTR_MODE)
2621 args->mode = attrs->ia_mode;
2623 args->mode = NO_CHANGE_64;
2625 if (attrs->ia_valid & ATTR_UID)
2626 args->uid = attrs->ia_uid;
2628 args->uid = INVALID_UID; /* no change */
2630 if (attrs->ia_valid & ATTR_GID)
2631 args->gid = attrs->ia_gid;
2633 args->gid = INVALID_GID; /* no change */
2635 if (attrs->ia_valid & ATTR_ATIME)
2636 args->atime = cifs_UnixTimeToNT(attrs->ia_atime);
2638 args->atime = NO_CHANGE_64;
2640 if (attrs->ia_valid & ATTR_MTIME)
2641 args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime);
2643 args->mtime = NO_CHANGE_64;
2645 if (attrs->ia_valid & ATTR_CTIME)
2646 args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime);
2648 args->ctime = NO_CHANGE_64;
2651 open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY);
2653 u16 nfid = open_file->fid.netfid;
2654 u32 npid = open_file->pid;
2655 pTcon = tlink_tcon(open_file->tlink);
2656 rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid);
2657 cifsFileInfo_put(open_file);
2659 tlink = cifs_sb_tlink(cifs_sb);
2660 if (IS_ERR(tlink)) {
2661 rc = PTR_ERR(tlink);
2664 pTcon = tlink_tcon(tlink);
2665 rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args,
2667 cifs_remap(cifs_sb));
2668 cifs_put_tlink(tlink);
2674 if ((attrs->ia_valid & ATTR_SIZE) &&
2675 attrs->ia_size != i_size_read(inode))
2676 truncate_setsize(inode, attrs->ia_size);
2678 setattr_copy(inode, attrs);
2679 mark_inode_dirty(inode);
2681 /* force revalidate when any of these times are set since some
2682 of the fs types (eg ext3, fat) do not have fine enough
2683 time granularity to match protocol, and we do not have a
2684 a way (yet) to query the server fs's time granularity (and
2685 whether it rounds times down).
2687 if (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME))
2688 cifsInode->time = 0;
2697 cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
2700 kuid_t uid = INVALID_UID;
2701 kgid_t gid = INVALID_GID;
2702 struct inode *inode = d_inode(direntry);
2703 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2704 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2705 struct cifsFileInfo *wfile;
2706 struct cifs_tcon *tcon;
2707 char *full_path = NULL;
2710 __u64 mode = NO_CHANGE_64;
2714 cifs_dbg(FYI, "setattr on file %pd attrs->ia_valid 0x%x\n",
2715 direntry, attrs->ia_valid);
2717 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
2718 attrs->ia_valid |= ATTR_FORCE;
2720 rc = setattr_prepare(direntry, attrs);
2726 full_path = build_path_from_dentry(direntry);
2727 if (full_path == NULL) {
2734 * Attempt to flush data before changing attributes. We need to do
2735 * this for ATTR_SIZE and ATTR_MTIME. If the flush of the data
2736 * returns error, store it to report later and continue.
2738 * BB: This should be smarter. Why bother flushing pages that
2739 * will be truncated anyway? Also, should we error out here if
2740 * the flush returns error? Do we need to check for ATTR_MTIME_SET flag?
2742 if (attrs->ia_valid & (ATTR_MTIME | ATTR_SIZE | ATTR_CTIME)) {
2743 rc = filemap_write_and_wait(inode->i_mapping);
2744 if (is_interrupt_error(rc)) {
2746 goto cifs_setattr_exit;
2748 mapping_set_error(inode->i_mapping, rc);
2753 if ((attrs->ia_valid & ATTR_MTIME) &&
2754 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) {
2755 rc = cifs_get_writable_file(cifsInode, FIND_WR_ANY, &wfile);
2757 tcon = tlink_tcon(wfile->tlink);
2758 rc = tcon->ses->server->ops->flush(xid, tcon, &wfile->fid);
2759 cifsFileInfo_put(wfile);
2761 goto cifs_setattr_exit;
2762 } else if (rc != -EBADF)
2763 goto cifs_setattr_exit;
2768 if (attrs->ia_valid & ATTR_SIZE) {
2769 rc = cifs_set_file_size(inode, attrs, xid, full_path);
2771 goto cifs_setattr_exit;
2774 if (attrs->ia_valid & ATTR_UID)
2775 uid = attrs->ia_uid;
2777 if (attrs->ia_valid & ATTR_GID)
2778 gid = attrs->ia_gid;
2780 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) ||
2781 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) {
2782 if (uid_valid(uid) || gid_valid(gid)) {
2783 rc = id_mode_to_cifs_acl(inode, full_path, NO_CHANGE_64,
2786 cifs_dbg(FYI, "%s: Setting id failed with error: %d\n",
2788 goto cifs_setattr_exit;
2792 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID))
2793 attrs->ia_valid &= ~(ATTR_UID | ATTR_GID);
2795 /* skip mode change if it's just for clearing setuid/setgid */
2796 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
2797 attrs->ia_valid &= ~ATTR_MODE;
2799 if (attrs->ia_valid & ATTR_MODE) {
2800 mode = attrs->ia_mode;
2802 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) ||
2803 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) {
2804 rc = id_mode_to_cifs_acl(inode, full_path, mode,
2805 INVALID_UID, INVALID_GID);
2807 cifs_dbg(FYI, "%s: Setting ACL failed with error: %d\n",
2809 goto cifs_setattr_exit;
2812 if (((mode & S_IWUGO) == 0) &&
2813 (cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
2815 dosattr = cifsInode->cifsAttrs | ATTR_READONLY;
2817 /* fix up mode if we're not using dynperm */
2818 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
2819 attrs->ia_mode = inode->i_mode & ~S_IWUGO;
2820 } else if ((mode & S_IWUGO) &&
2821 (cifsInode->cifsAttrs & ATTR_READONLY)) {
2823 dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
2824 /* Attributes of 0 are ignored */
2826 dosattr |= ATTR_NORMAL;
2828 /* reset local inode permissions to normal */
2829 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2830 attrs->ia_mode &= ~(S_IALLUGO);
2831 if (S_ISDIR(inode->i_mode))
2833 cifs_sb->mnt_dir_mode;
2836 cifs_sb->mnt_file_mode;
2838 } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2839 /* ignore mode change - ATTR_READONLY hasn't changed */
2840 attrs->ia_valid &= ~ATTR_MODE;
2844 if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) ||
2845 ((attrs->ia_valid & ATTR_MODE) && dosattr)) {
2846 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
2847 /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */
2849 /* Even if error on time set, no sense failing the call if
2850 the server would set the time to a reasonable value anyway,
2851 and this check ensures that we are not being called from
2852 sys_utimes in which case we ought to fail the call back to
2853 the user when the server rejects the call */
2854 if ((rc) && (attrs->ia_valid &
2855 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
2859 /* do not need local check to inode_check_ok since the server does
2862 goto cifs_setattr_exit;
2864 if ((attrs->ia_valid & ATTR_SIZE) &&
2865 attrs->ia_size != i_size_read(inode))
2866 truncate_setsize(inode, attrs->ia_size);
2868 setattr_copy(inode, attrs);
2869 mark_inode_dirty(inode);
2878 cifs_setattr(struct dentry *direntry, struct iattr *attrs)
2880 struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
2881 struct cifs_tcon *pTcon = cifs_sb_master_tcon(cifs_sb);
2883 if (pTcon->unix_ext)
2884 return cifs_setattr_unix(direntry, attrs);
2886 return cifs_setattr_nounix(direntry, attrs);
2888 /* BB: add cifs_setattr_legacy for really old servers */
2892 void cifs_delete_inode(struct inode *inode)
2894 cifs_dbg(FYI, "In cifs_delete_inode, inode = 0x%p\n", inode);
2895 /* may have to add back in if and when safe distributed caching of
2896 directories added e.g. via FindNotify */