4 * Copyright (C) International Business Machines Corp., 2002,2010
5 * Author(s): Steve French (sfrench@us.ibm.com)
7 * This library is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU Lesser General Public License as published
9 * by the Free Software Foundation; either version 2.1 of the License, or
10 * (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
15 * the GNU Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public License
18 * along with this library; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include <linux/stat.h>
23 #include <linux/slab.h>
24 #include <linux/pagemap.h>
25 #include <linux/freezer.h>
26 #include <linux/sched/signal.h>
27 #include <linux/wait_bit.h>
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 TCP_Server_Info *server;
1090 struct tcon_link *tlink;
1091 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1092 bool adjust_tz = false;
1093 struct cifs_fattr fattr = {0};
1094 bool symlink = false;
1095 struct smb311_posix_qinfo *data = NULL;
1099 tlink = cifs_sb_tlink(cifs_sb);
1101 return PTR_ERR(tlink);
1102 tcon = tlink_tcon(tlink);
1103 server = tcon->ses->server;
1106 * 1. Fetch file metadata
1109 if (is_inode_cache_good(*inode)) {
1110 cifs_dbg(FYI, "No need to revalidate cached inode sizes\n");
1113 data = kmalloc(sizeof(struct smb311_posix_qinfo), GFP_KERNEL);
1119 rc = smb311_posix_query_path_info(xid, tcon, cifs_sb,
1121 &adjust_tz, &symlink);
1124 * 2. Convert it to internal cifs metadata (fattr)
1129 smb311_posix_info_to_fattr(&fattr, data, sb, adjust_tz, symlink);
1132 /* DFS link, no metadata available on this server */
1133 cifs_create_dfs_fattr(&fattr, sb);
1138 * For SMB2 and later the backup intent flag
1139 * is already sent if needed on open and there
1140 * is no path based FindFirst operation to use
1141 * to retry with so nothing we can do, bail out
1145 cifs_dbg(FYI, "%s: unhandled err rc %d\n", __func__, rc);
1151 * 4. Tweak fattr based on mount options
1154 /* check for Minshall+French symlinks */
1155 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
1156 tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr,
1159 cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc);
1163 * 5. Update inode with final fattr data
1167 *inode = cifs_iget(sb, &fattr);
1171 /* we already have inode, update it */
1173 /* if uniqueid is different, return error */
1174 if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM &&
1175 CIFS_I(*inode)->uniqueid != fattr.cf_uniqueid)) {
1176 CIFS_I(*inode)->time = 0; /* force reval */
1181 /* if filetype is different, return error */
1182 if (unlikely(((*inode)->i_mode & S_IFMT) !=
1183 (fattr.cf_mode & S_IFMT))) {
1184 CIFS_I(*inode)->time = 0; /* force reval */
1189 cifs_fattr_to_inode(*inode, &fattr);
1192 cifs_put_tlink(tlink);
1198 static const struct inode_operations cifs_ipc_inode_ops = {
1199 .lookup = cifs_lookup,
1203 cifs_find_inode(struct inode *inode, void *opaque)
1205 struct cifs_fattr *fattr = (struct cifs_fattr *) opaque;
1207 /* don't match inode with different uniqueid */
1208 if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid)
1211 /* use createtime like an i_generation field */
1212 if (CIFS_I(inode)->createtime != fattr->cf_createtime)
1215 /* don't match inode of different type */
1216 if ((inode->i_mode & S_IFMT) != (fattr->cf_mode & S_IFMT))
1219 /* if it's not a directory or has no dentries, then flag it */
1220 if (S_ISDIR(inode->i_mode) && !hlist_empty(&inode->i_dentry))
1221 fattr->cf_flags |= CIFS_FATTR_INO_COLLISION;
1227 cifs_init_inode(struct inode *inode, void *opaque)
1229 struct cifs_fattr *fattr = (struct cifs_fattr *) opaque;
1231 CIFS_I(inode)->uniqueid = fattr->cf_uniqueid;
1232 CIFS_I(inode)->createtime = fattr->cf_createtime;
1237 * walk dentry list for an inode and report whether it has aliases that
1238 * are hashed. We use this to determine if a directory inode can actually
1242 inode_has_hashed_dentries(struct inode *inode)
1244 struct dentry *dentry;
1246 spin_lock(&inode->i_lock);
1247 hlist_for_each_entry(dentry, &inode->i_dentry, d_u.d_alias) {
1248 if (!d_unhashed(dentry) || IS_ROOT(dentry)) {
1249 spin_unlock(&inode->i_lock);
1253 spin_unlock(&inode->i_lock);
1257 /* Given fattrs, get a corresponding inode */
1259 cifs_iget(struct super_block *sb, struct cifs_fattr *fattr)
1262 struct inode *inode;
1265 cifs_dbg(FYI, "looking for uniqueid=%llu\n", fattr->cf_uniqueid);
1267 /* hash down to 32-bits on 32-bit arch */
1268 hash = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid);
1270 inode = iget5_locked(sb, hash, cifs_find_inode, cifs_init_inode, fattr);
1272 /* was there a potentially problematic inode collision? */
1273 if (fattr->cf_flags & CIFS_FATTR_INO_COLLISION) {
1274 fattr->cf_flags &= ~CIFS_FATTR_INO_COLLISION;
1276 if (inode_has_hashed_dentries(inode)) {
1277 cifs_autodisable_serverino(CIFS_SB(sb));
1279 fattr->cf_uniqueid = iunique(sb, ROOT_I);
1280 goto retry_iget5_locked;
1284 cifs_fattr_to_inode(inode, fattr);
1285 if (sb->s_flags & SB_NOATIME)
1286 inode->i_flags |= S_NOATIME | S_NOCMTIME;
1287 if (inode->i_state & I_NEW) {
1288 inode->i_ino = hash;
1289 #ifdef CONFIG_CIFS_FSCACHE
1290 /* initialize per-inode cache cookie pointer */
1291 CIFS_I(inode)->fscache = NULL;
1293 unlock_new_inode(inode);
1300 /* gets root inode */
1301 struct inode *cifs_root_iget(struct super_block *sb)
1304 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1305 struct inode *inode = NULL;
1307 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
1311 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH)
1312 && cifs_sb->prepath) {
1313 len = strlen(cifs_sb->prepath);
1314 path = kzalloc(len + 2 /* leading sep + null */, GFP_KERNEL);
1316 return ERR_PTR(-ENOMEM);
1318 memcpy(path+1, cifs_sb->prepath, len);
1320 path = kstrdup("", GFP_KERNEL);
1322 return ERR_PTR(-ENOMEM);
1326 if (tcon->unix_ext) {
1327 rc = cifs_get_inode_info_unix(&inode, path, sb, xid);
1328 /* some servers mistakenly claim POSIX support */
1329 if (rc != -EOPNOTSUPP)
1331 cifs_dbg(VFS, "server does not support POSIX extensions\n");
1332 tcon->unix_ext = false;
1335 convert_delimiter(path, CIFS_DIR_SEP(cifs_sb));
1336 if (tcon->posix_extensions)
1337 rc = smb311_posix_get_inode_info(&inode, path, sb, xid);
1339 rc = cifs_get_inode_info(&inode, path, NULL, sb, xid, NULL);
1343 inode = ERR_PTR(rc);
1347 #ifdef CONFIG_CIFS_FSCACHE
1348 /* populate tcon->resource_id */
1349 tcon->resource_id = CIFS_I(inode)->uniqueid;
1352 if (rc && tcon->pipe) {
1353 cifs_dbg(FYI, "ipc connection - fake read inode\n");
1354 spin_lock(&inode->i_lock);
1355 inode->i_mode |= S_IFDIR;
1356 set_nlink(inode, 2);
1357 inode->i_op = &cifs_ipc_inode_ops;
1358 inode->i_fop = &simple_dir_operations;
1359 inode->i_uid = cifs_sb->mnt_uid;
1360 inode->i_gid = cifs_sb->mnt_gid;
1361 spin_unlock(&inode->i_lock);
1364 inode = ERR_PTR(rc);
1374 cifs_set_file_info(struct inode *inode, struct iattr *attrs, unsigned int xid,
1375 char *full_path, __u32 dosattr)
1377 bool set_time = false;
1378 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1379 struct TCP_Server_Info *server;
1380 FILE_BASIC_INFO info_buf;
1385 server = cifs_sb_master_tcon(cifs_sb)->ses->server;
1386 if (!server->ops->set_file_info)
1391 if (attrs->ia_valid & ATTR_ATIME) {
1393 info_buf.LastAccessTime =
1394 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1396 info_buf.LastAccessTime = 0;
1398 if (attrs->ia_valid & ATTR_MTIME) {
1400 info_buf.LastWriteTime =
1401 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1403 info_buf.LastWriteTime = 0;
1406 * Samba throws this field away, but windows may actually use it.
1407 * Do not set ctime unless other time stamps are changed explicitly
1408 * (i.e. by utimes()) since we would then have a mix of client and
1411 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1412 cifs_dbg(FYI, "CIFS - CTIME changed\n");
1413 info_buf.ChangeTime =
1414 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1416 info_buf.ChangeTime = 0;
1418 info_buf.CreationTime = 0; /* don't change */
1419 info_buf.Attributes = cpu_to_le32(dosattr);
1421 return server->ops->set_file_info(inode, full_path, &info_buf, xid);
1425 * Open the given file (if it isn't already), set the DELETE_ON_CLOSE bit
1426 * and rename it to a random name that hopefully won't conflict with
1430 cifs_rename_pending_delete(const char *full_path, struct dentry *dentry,
1431 const unsigned int xid)
1435 struct cifs_fid fid;
1436 struct cifs_open_parms oparms;
1437 struct inode *inode = d_inode(dentry);
1438 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1439 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1440 struct tcon_link *tlink;
1441 struct cifs_tcon *tcon;
1442 __u32 dosattr, origattr;
1443 FILE_BASIC_INFO *info_buf = NULL;
1445 tlink = cifs_sb_tlink(cifs_sb);
1447 return PTR_ERR(tlink);
1448 tcon = tlink_tcon(tlink);
1451 * We cannot rename the file if the server doesn't support
1452 * CAP_INFOLEVEL_PASSTHRU
1454 if (!(tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)) {
1460 oparms.cifs_sb = cifs_sb;
1461 oparms.desired_access = DELETE | FILE_WRITE_ATTRIBUTES;
1462 oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR);
1463 oparms.disposition = FILE_OPEN;
1464 oparms.path = full_path;
1466 oparms.reconnect = false;
1468 rc = CIFS_open(xid, &oparms, &oplock, NULL);
1472 origattr = cifsInode->cifsAttrs;
1474 origattr |= ATTR_NORMAL;
1476 dosattr = origattr & ~ATTR_READONLY;
1478 dosattr |= ATTR_NORMAL;
1479 dosattr |= ATTR_HIDDEN;
1481 /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */
1482 if (dosattr != origattr) {
1483 info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL);
1484 if (info_buf == NULL) {
1488 info_buf->Attributes = cpu_to_le32(dosattr);
1489 rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid,
1491 /* although we would like to mark the file hidden
1492 if that fails we will still try to rename it */
1494 cifsInode->cifsAttrs = dosattr;
1496 dosattr = origattr; /* since not able to change them */
1499 /* rename the file */
1500 rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, NULL,
1502 cifs_remap(cifs_sb));
1508 /* try to set DELETE_ON_CLOSE */
1509 if (!test_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags)) {
1510 rc = CIFSSMBSetFileDisposition(xid, tcon, true, fid.netfid,
1513 * some samba versions return -ENOENT when we try to set the
1514 * file disposition here. Likely a samba bug, but work around
1515 * it for now. This means that some cifsXXX files may hang
1516 * around after they shouldn't.
1518 * BB: remove this hack after more servers have the fix
1526 set_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags);
1530 CIFSSMBClose(xid, tcon, fid.netfid);
1533 cifs_put_tlink(tlink);
1537 * reset everything back to the original state. Don't bother
1538 * dealing with errors here since we can't do anything about
1542 CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, dentry->d_name.name,
1543 cifs_sb->local_nls, cifs_remap(cifs_sb));
1545 if (dosattr != origattr) {
1546 info_buf->Attributes = cpu_to_le32(origattr);
1547 if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid,
1549 cifsInode->cifsAttrs = origattr;
1555 /* copied from fs/nfs/dir.c with small changes */
1557 cifs_drop_nlink(struct inode *inode)
1559 spin_lock(&inode->i_lock);
1560 if (inode->i_nlink > 0)
1562 spin_unlock(&inode->i_lock);
1566 * If d_inode(dentry) is null (usually meaning the cached dentry
1567 * is a negative dentry) then we would attempt a standard SMB delete, but
1568 * if that fails we can not attempt the fall back mechanisms on EACCES
1569 * but will return the EACCES to the caller. Note that the VFS does not call
1570 * unlink on negative dentries currently.
1572 int cifs_unlink(struct inode *dir, struct dentry *dentry)
1576 char *full_path = NULL;
1577 struct inode *inode = d_inode(dentry);
1578 struct cifsInodeInfo *cifs_inode;
1579 struct super_block *sb = dir->i_sb;
1580 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1581 struct tcon_link *tlink;
1582 struct cifs_tcon *tcon;
1583 struct TCP_Server_Info *server;
1584 struct iattr *attrs = NULL;
1585 __u32 dosattr = 0, origattr = 0;
1587 cifs_dbg(FYI, "cifs_unlink, dir=0x%p, dentry=0x%p\n", dir, dentry);
1589 tlink = cifs_sb_tlink(cifs_sb);
1591 return PTR_ERR(tlink);
1592 tcon = tlink_tcon(tlink);
1593 server = tcon->ses->server;
1597 if (tcon->nodelete) {
1602 /* Unlink can be called from rename so we can not take the
1603 * sb->s_vfs_rename_mutex here */
1604 full_path = build_path_from_dentry(dentry);
1605 if (full_path == NULL) {
1610 if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1611 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1612 rc = CIFSPOSIXDelFile(xid, tcon, full_path,
1613 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
1614 cifs_remap(cifs_sb));
1615 cifs_dbg(FYI, "posix del rc %d\n", rc);
1616 if ((rc == 0) || (rc == -ENOENT))
1617 goto psx_del_no_retry;
1621 if (!server->ops->unlink) {
1623 goto psx_del_no_retry;
1626 rc = server->ops->unlink(xid, tcon, full_path, cifs_sb);
1631 cifs_drop_nlink(inode);
1632 } else if (rc == -ENOENT) {
1634 } else if (rc == -EBUSY) {
1635 if (server->ops->rename_pending_delete) {
1636 rc = server->ops->rename_pending_delete(full_path,
1639 cifs_drop_nlink(inode);
1641 } else if ((rc == -EACCES) && (dosattr == 0) && inode) {
1642 attrs = kzalloc(sizeof(*attrs), GFP_KERNEL);
1643 if (attrs == NULL) {
1648 /* try to reset dos attributes */
1649 cifs_inode = CIFS_I(inode);
1650 origattr = cifs_inode->cifsAttrs;
1652 origattr |= ATTR_NORMAL;
1653 dosattr = origattr & ~ATTR_READONLY;
1655 dosattr |= ATTR_NORMAL;
1656 dosattr |= ATTR_HIDDEN;
1658 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
1662 goto retry_std_delete;
1665 /* undo the setattr if we errored out and it's needed */
1666 if (rc != 0 && dosattr != 0)
1667 cifs_set_file_info(inode, attrs, xid, full_path, origattr);
1671 cifs_inode = CIFS_I(inode);
1672 cifs_inode->time = 0; /* will force revalidate to get info
1674 inode->i_ctime = current_time(inode);
1676 dir->i_ctime = dir->i_mtime = current_time(dir);
1677 cifs_inode = CIFS_I(dir);
1678 CIFS_I(dir)->time = 0; /* force revalidate of dir as well */
1683 cifs_put_tlink(tlink);
1688 cifs_mkdir_qinfo(struct inode *parent, struct dentry *dentry, umode_t mode,
1689 const char *full_path, struct cifs_sb_info *cifs_sb,
1690 struct cifs_tcon *tcon, const unsigned int xid)
1693 struct inode *inode = NULL;
1695 if (tcon->posix_extensions)
1696 rc = smb311_posix_get_inode_info(&inode, full_path, parent->i_sb, xid);
1697 else if (tcon->unix_ext)
1698 rc = cifs_get_inode_info_unix(&inode, full_path, parent->i_sb,
1701 rc = cifs_get_inode_info(&inode, full_path, NULL, parent->i_sb,
1708 * setting nlink not necessary except in cases where we failed to get it
1709 * from the server or was set bogus. Also, since this is a brand new
1710 * inode, no need to grab the i_lock before setting the i_nlink.
1712 if (inode->i_nlink < 2)
1713 set_nlink(inode, 2);
1714 mode &= ~current_umask();
1715 /* must turn on setgid bit if parent dir has it */
1716 if (parent->i_mode & S_ISGID)
1719 if (tcon->unix_ext) {
1720 struct cifs_unix_set_info_args args = {
1722 .ctime = NO_CHANGE_64,
1723 .atime = NO_CHANGE_64,
1724 .mtime = NO_CHANGE_64,
1727 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1728 args.uid = current_fsuid();
1729 if (parent->i_mode & S_ISGID)
1730 args.gid = parent->i_gid;
1732 args.gid = current_fsgid();
1734 args.uid = INVALID_UID; /* no change */
1735 args.gid = INVALID_GID; /* no change */
1737 CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args,
1739 cifs_remap(cifs_sb));
1741 struct TCP_Server_Info *server = tcon->ses->server;
1742 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
1743 (mode & S_IWUGO) == 0 && server->ops->mkdir_setinfo)
1744 server->ops->mkdir_setinfo(inode, full_path, cifs_sb,
1746 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
1747 inode->i_mode = (mode | S_IFDIR);
1749 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1750 inode->i_uid = current_fsuid();
1751 if (inode->i_mode & S_ISGID)
1752 inode->i_gid = parent->i_gid;
1754 inode->i_gid = current_fsgid();
1757 d_instantiate(dentry, inode);
1762 cifs_posix_mkdir(struct inode *inode, struct dentry *dentry, umode_t mode,
1763 const char *full_path, struct cifs_sb_info *cifs_sb,
1764 struct cifs_tcon *tcon, const unsigned int xid)
1768 FILE_UNIX_BASIC_INFO *info = NULL;
1769 struct inode *newinode = NULL;
1770 struct cifs_fattr fattr;
1772 info = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1775 goto posix_mkdir_out;
1778 mode &= ~current_umask();
1779 rc = CIFSPOSIXCreate(xid, tcon, SMB_O_DIRECTORY | SMB_O_CREAT, mode,
1780 NULL /* netfid */, info, &oplock, full_path,
1781 cifs_sb->local_nls, cifs_remap(cifs_sb));
1782 if (rc == -EOPNOTSUPP)
1783 goto posix_mkdir_out;
1785 cifs_dbg(FYI, "posix mkdir returned 0x%x\n", rc);
1787 goto posix_mkdir_out;
1790 if (info->Type == cpu_to_le32(-1))
1791 /* no return info, go query for it */
1792 goto posix_mkdir_get_info;
1794 * BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if
1795 * need to set uid/gid.
1798 cifs_unix_basic_to_fattr(&fattr, info, cifs_sb);
1799 cifs_fill_uniqueid(inode->i_sb, &fattr);
1800 newinode = cifs_iget(inode->i_sb, &fattr);
1802 goto posix_mkdir_get_info;
1804 d_instantiate(dentry, newinode);
1806 #ifdef CONFIG_CIFS_DEBUG2
1807 cifs_dbg(FYI, "instantiated dentry %p %pd to inode %p\n",
1808 dentry, dentry, newinode);
1810 if (newinode->i_nlink != 2)
1811 cifs_dbg(FYI, "unexpected number of links %d\n",
1818 posix_mkdir_get_info:
1819 rc = cifs_mkdir_qinfo(inode, dentry, mode, full_path, cifs_sb, tcon,
1821 goto posix_mkdir_out;
1824 int cifs_mkdir(struct inode *inode, struct dentry *direntry, umode_t mode)
1828 struct cifs_sb_info *cifs_sb;
1829 struct tcon_link *tlink;
1830 struct cifs_tcon *tcon;
1831 struct TCP_Server_Info *server;
1834 cifs_dbg(FYI, "In cifs_mkdir, mode = %04ho inode = 0x%p\n",
1837 cifs_sb = CIFS_SB(inode->i_sb);
1838 tlink = cifs_sb_tlink(cifs_sb);
1840 return PTR_ERR(tlink);
1841 tcon = tlink_tcon(tlink);
1845 full_path = build_path_from_dentry(direntry);
1846 if (full_path == NULL) {
1851 server = tcon->ses->server;
1853 if ((server->ops->posix_mkdir) && (tcon->posix_extensions)) {
1854 rc = server->ops->posix_mkdir(xid, inode, mode, tcon, full_path,
1856 d_drop(direntry); /* for time being always refresh inode info */
1860 if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1861 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1862 rc = cifs_posix_mkdir(inode, direntry, mode, full_path, cifs_sb,
1864 if (rc != -EOPNOTSUPP)
1868 if (!server->ops->mkdir) {
1873 /* BB add setting the equivalent of mode via CreateX w/ACLs */
1874 rc = server->ops->mkdir(xid, inode, mode, tcon, full_path, cifs_sb);
1876 cifs_dbg(FYI, "cifs_mkdir returned 0x%x\n", rc);
1881 /* TODO: skip this for smb2/smb3 */
1882 rc = cifs_mkdir_qinfo(inode, direntry, mode, full_path, cifs_sb, tcon,
1886 * Force revalidate to get parent dir info when needed since cached
1887 * attributes are invalid now.
1889 CIFS_I(inode)->time = 0;
1892 cifs_put_tlink(tlink);
1896 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1900 struct cifs_sb_info *cifs_sb;
1901 struct tcon_link *tlink;
1902 struct cifs_tcon *tcon;
1903 struct TCP_Server_Info *server;
1904 char *full_path = NULL;
1905 struct cifsInodeInfo *cifsInode;
1907 cifs_dbg(FYI, "cifs_rmdir, inode = 0x%p\n", inode);
1911 full_path = build_path_from_dentry(direntry);
1912 if (full_path == NULL) {
1917 cifs_sb = CIFS_SB(inode->i_sb);
1918 tlink = cifs_sb_tlink(cifs_sb);
1919 if (IS_ERR(tlink)) {
1920 rc = PTR_ERR(tlink);
1923 tcon = tlink_tcon(tlink);
1924 server = tcon->ses->server;
1926 if (!server->ops->rmdir) {
1928 cifs_put_tlink(tlink);
1932 if (tcon->nodelete) {
1934 cifs_put_tlink(tlink);
1938 rc = server->ops->rmdir(xid, tcon, full_path, cifs_sb);
1939 cifs_put_tlink(tlink);
1942 spin_lock(&d_inode(direntry)->i_lock);
1943 i_size_write(d_inode(direntry), 0);
1944 clear_nlink(d_inode(direntry));
1945 spin_unlock(&d_inode(direntry)->i_lock);
1948 cifsInode = CIFS_I(d_inode(direntry));
1949 /* force revalidate to go get info when needed */
1950 cifsInode->time = 0;
1952 cifsInode = CIFS_I(inode);
1954 * Force revalidate to get parent dir info when needed since cached
1955 * attributes are invalid now.
1957 cifsInode->time = 0;
1959 d_inode(direntry)->i_ctime = inode->i_ctime = inode->i_mtime =
1960 current_time(inode);
1969 cifs_do_rename(const unsigned int xid, struct dentry *from_dentry,
1970 const char *from_path, struct dentry *to_dentry,
1971 const char *to_path)
1973 struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb);
1974 struct tcon_link *tlink;
1975 struct cifs_tcon *tcon;
1976 struct TCP_Server_Info *server;
1977 struct cifs_fid fid;
1978 struct cifs_open_parms oparms;
1981 tlink = cifs_sb_tlink(cifs_sb);
1983 return PTR_ERR(tlink);
1984 tcon = tlink_tcon(tlink);
1985 server = tcon->ses->server;
1987 if (!server->ops->rename)
1990 /* try path-based rename first */
1991 rc = server->ops->rename(xid, tcon, from_path, to_path, cifs_sb);
1994 * Don't bother with rename by filehandle unless file is busy and
1995 * source. Note that cross directory moves do not work with
1996 * rename by filehandle to various Windows servers.
1998 if (rc == 0 || rc != -EBUSY)
1999 goto do_rename_exit;
2001 /* Don't fall back to using SMB on SMB 2+ mount */
2002 if (server->vals->protocol_id != 0)
2003 goto do_rename_exit;
2005 /* open-file renames don't work across directories */
2006 if (to_dentry->d_parent != from_dentry->d_parent)
2007 goto do_rename_exit;
2010 oparms.cifs_sb = cifs_sb;
2011 /* open the file to be renamed -- we need DELETE perms */
2012 oparms.desired_access = DELETE;
2013 oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR);
2014 oparms.disposition = FILE_OPEN;
2015 oparms.path = from_path;
2017 oparms.reconnect = false;
2019 rc = CIFS_open(xid, &oparms, &oplock, NULL);
2021 rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid,
2022 (const char *) to_dentry->d_name.name,
2023 cifs_sb->local_nls, cifs_remap(cifs_sb));
2024 CIFSSMBClose(xid, tcon, fid.netfid);
2028 d_move(from_dentry, to_dentry);
2029 cifs_put_tlink(tlink);
2034 cifs_rename2(struct inode *source_dir, struct dentry *source_dentry,
2035 struct inode *target_dir, struct dentry *target_dentry,
2038 char *from_name = NULL;
2039 char *to_name = NULL;
2040 struct cifs_sb_info *cifs_sb;
2041 struct tcon_link *tlink;
2042 struct cifs_tcon *tcon;
2043 FILE_UNIX_BASIC_INFO *info_buf_source = NULL;
2044 FILE_UNIX_BASIC_INFO *info_buf_target;
2048 if (flags & ~RENAME_NOREPLACE)
2051 cifs_sb = CIFS_SB(source_dir->i_sb);
2052 tlink = cifs_sb_tlink(cifs_sb);
2054 return PTR_ERR(tlink);
2055 tcon = tlink_tcon(tlink);
2060 * we already have the rename sem so we do not need to
2061 * grab it again here to protect the path integrity
2063 from_name = build_path_from_dentry(source_dentry);
2064 if (from_name == NULL) {
2066 goto cifs_rename_exit;
2069 to_name = build_path_from_dentry(target_dentry);
2070 if (to_name == NULL) {
2072 goto cifs_rename_exit;
2075 rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry,
2079 * No-replace is the natural behavior for CIFS, so skip unlink hacks.
2081 if (flags & RENAME_NOREPLACE)
2082 goto cifs_rename_exit;
2084 if (rc == -EEXIST && tcon->unix_ext) {
2086 * Are src and dst hardlinks of same inode? We can only tell
2087 * with unix extensions enabled.
2090 kmalloc_array(2, sizeof(FILE_UNIX_BASIC_INFO),
2092 if (info_buf_source == NULL) {
2094 goto cifs_rename_exit;
2097 info_buf_target = info_buf_source + 1;
2098 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, from_name,
2101 cifs_remap(cifs_sb));
2105 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, to_name,
2108 cifs_remap(cifs_sb));
2110 if (tmprc == 0 && (info_buf_source->UniqueId ==
2111 info_buf_target->UniqueId)) {
2112 /* same file, POSIX says that this is a noop */
2114 goto cifs_rename_exit;
2118 * else ... BB we could add the same check for Windows by
2119 * checking the UniqueId via FILE_INTERNAL_INFO
2123 /* Try unlinking the target dentry if it's not negative */
2124 if (d_really_is_positive(target_dentry) && (rc == -EACCES || rc == -EEXIST)) {
2125 if (d_is_dir(target_dentry))
2126 tmprc = cifs_rmdir(target_dir, target_dentry);
2128 tmprc = cifs_unlink(target_dir, target_dentry);
2130 goto cifs_rename_exit;
2131 rc = cifs_do_rename(xid, source_dentry, from_name,
2132 target_dentry, to_name);
2135 /* force revalidate to go get info when needed */
2136 CIFS_I(source_dir)->time = CIFS_I(target_dir)->time = 0;
2138 source_dir->i_ctime = source_dir->i_mtime = target_dir->i_ctime =
2139 target_dir->i_mtime = current_time(source_dir);
2142 kfree(info_buf_source);
2146 cifs_put_tlink(tlink);
2151 cifs_inode_needs_reval(struct inode *inode)
2153 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2154 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2156 if (cifs_i->time == 0)
2159 if (CIFS_CACHE_READ(cifs_i))
2162 if (!lookupCacheEnabled)
2165 if (!cifs_sb->actimeo)
2168 if (!time_in_range(jiffies, cifs_i->time,
2169 cifs_i->time + cifs_sb->actimeo))
2172 /* hardlinked files w/ noserverino get "special" treatment */
2173 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) &&
2174 S_ISREG(inode->i_mode) && inode->i_nlink != 1)
2181 * Zap the cache. Called when invalid_mapping flag is set.
2184 cifs_invalidate_mapping(struct inode *inode)
2188 if (inode->i_mapping && inode->i_mapping->nrpages != 0) {
2189 rc = invalidate_inode_pages2(inode->i_mapping);
2191 cifs_dbg(VFS, "%s: Could not invalidate inode %p\n",
2195 cifs_fscache_reset_inode_cookie(inode);
2200 * cifs_wait_bit_killable - helper for functions that are sleeping on bit locks
2201 * @word: long word containing the bit lock
2204 cifs_wait_bit_killable(struct wait_bit_key *key, int mode)
2206 freezable_schedule_unsafe();
2207 if (signal_pending_state(mode, current))
2208 return -ERESTARTSYS;
2213 cifs_revalidate_mapping(struct inode *inode)
2216 unsigned long *flags = &CIFS_I(inode)->flags;
2218 /* swapfiles are not supposed to be shared */
2219 if (IS_SWAPFILE(inode))
2222 rc = wait_on_bit_lock_action(flags, CIFS_INO_LOCK, cifs_wait_bit_killable,
2227 if (test_and_clear_bit(CIFS_INO_INVALID_MAPPING, flags)) {
2228 rc = cifs_invalidate_mapping(inode);
2230 set_bit(CIFS_INO_INVALID_MAPPING, flags);
2233 clear_bit_unlock(CIFS_INO_LOCK, flags);
2234 smp_mb__after_atomic();
2235 wake_up_bit(flags, CIFS_INO_LOCK);
2241 cifs_zap_mapping(struct inode *inode)
2243 set_bit(CIFS_INO_INVALID_MAPPING, &CIFS_I(inode)->flags);
2244 return cifs_revalidate_mapping(inode);
2247 int cifs_revalidate_file_attr(struct file *filp)
2250 struct inode *inode = file_inode(filp);
2251 struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data;
2253 if (!cifs_inode_needs_reval(inode))
2256 if (tlink_tcon(cfile->tlink)->unix_ext)
2257 rc = cifs_get_file_info_unix(filp);
2259 rc = cifs_get_file_info(filp);
2264 int cifs_revalidate_dentry_attr(struct dentry *dentry)
2268 struct inode *inode = d_inode(dentry);
2269 struct super_block *sb = dentry->d_sb;
2270 char *full_path = NULL;
2276 if (!cifs_inode_needs_reval(inode))
2281 /* can not safely grab the rename sem here if rename calls revalidate
2282 since that would deadlock */
2283 full_path = build_path_from_dentry(dentry);
2284 if (full_path == NULL) {
2289 cifs_dbg(FYI, "Update attributes: %s inode 0x%p count %d dentry: 0x%p d_time %ld jiffies %ld\n",
2290 full_path, inode, inode->i_count.counter,
2291 dentry, cifs_get_time(dentry), jiffies);
2294 if (cifs_sb_master_tcon(CIFS_SB(sb))->posix_extensions)
2295 rc = smb311_posix_get_inode_info(&inode, full_path, sb, xid);
2296 else if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext)
2297 rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid);
2299 rc = cifs_get_inode_info(&inode, full_path, NULL, sb,
2301 if (rc == -EAGAIN && count++ < 10)
2310 int cifs_revalidate_file(struct file *filp)
2313 struct inode *inode = file_inode(filp);
2315 rc = cifs_revalidate_file_attr(filp);
2319 return cifs_revalidate_mapping(inode);
2322 /* revalidate a dentry's inode attributes */
2323 int cifs_revalidate_dentry(struct dentry *dentry)
2326 struct inode *inode = d_inode(dentry);
2328 rc = cifs_revalidate_dentry_attr(dentry);
2332 return cifs_revalidate_mapping(inode);
2335 int cifs_getattr(const struct path *path, struct kstat *stat,
2336 u32 request_mask, unsigned int flags)
2338 struct dentry *dentry = path->dentry;
2339 struct cifs_sb_info *cifs_sb = CIFS_SB(dentry->d_sb);
2340 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
2341 struct inode *inode = d_inode(dentry);
2345 * We need to be sure that all dirty pages are written and the server
2346 * has actual ctime, mtime and file length.
2348 if ((request_mask & (STATX_CTIME | STATX_MTIME | STATX_SIZE)) &&
2349 !CIFS_CACHE_READ(CIFS_I(inode)) &&
2350 inode->i_mapping && inode->i_mapping->nrpages != 0) {
2351 rc = filemap_fdatawait(inode->i_mapping);
2353 mapping_set_error(inode->i_mapping, rc);
2358 if ((flags & AT_STATX_SYNC_TYPE) == AT_STATX_FORCE_SYNC)
2359 CIFS_I(inode)->time = 0; /* force revalidate */
2362 * If the caller doesn't require syncing, only sync if
2363 * necessary (e.g. due to earlier truncate or setattr
2364 * invalidating the cached metadata)
2366 if (((flags & AT_STATX_SYNC_TYPE) != AT_STATX_DONT_SYNC) ||
2367 (CIFS_I(inode)->time == 0)) {
2368 rc = cifs_revalidate_dentry_attr(dentry);
2373 generic_fillattr(inode, stat);
2374 stat->blksize = cifs_sb->bsize;
2375 stat->ino = CIFS_I(inode)->uniqueid;
2377 /* old CIFS Unix Extensions doesn't return create time */
2378 if (CIFS_I(inode)->createtime) {
2379 stat->result_mask |= STATX_BTIME;
2381 cifs_NTtimeToUnix(cpu_to_le64(CIFS_I(inode)->createtime));
2384 stat->attributes_mask |= (STATX_ATTR_COMPRESSED | STATX_ATTR_ENCRYPTED);
2385 if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_COMPRESSED)
2386 stat->attributes |= STATX_ATTR_COMPRESSED;
2387 if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_ENCRYPTED)
2388 stat->attributes |= STATX_ATTR_ENCRYPTED;
2391 * If on a multiuser mount without unix extensions or cifsacl being
2392 * enabled, and the admin hasn't overridden them, set the ownership
2393 * to the fsuid/fsgid of the current process.
2395 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) &&
2396 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
2398 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID))
2399 stat->uid = current_fsuid();
2400 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID))
2401 stat->gid = current_fsgid();
2406 int cifs_fiemap(struct inode *inode, struct fiemap_extent_info *fei, u64 start,
2409 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2410 struct cifs_sb_info *cifs_sb = CIFS_SB(cifs_i->vfs_inode.i_sb);
2411 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
2412 struct TCP_Server_Info *server = tcon->ses->server;
2413 struct cifsFileInfo *cfile;
2417 * We need to be sure that all dirty pages are written as they
2418 * might fill holes on the server.
2420 if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
2421 inode->i_mapping->nrpages != 0) {
2422 rc = filemap_fdatawait(inode->i_mapping);
2424 mapping_set_error(inode->i_mapping, rc);
2429 cfile = find_readable_file(cifs_i, false);
2433 if (server->ops->fiemap) {
2434 rc = server->ops->fiemap(tcon, cfile, fei, start, len);
2435 cifsFileInfo_put(cfile);
2439 cifsFileInfo_put(cfile);
2443 int cifs_truncate_page(struct address_space *mapping, loff_t from)
2445 pgoff_t index = from >> PAGE_SHIFT;
2446 unsigned offset = from & (PAGE_SIZE - 1);
2450 page = grab_cache_page(mapping, index);
2454 zero_user_segment(page, offset, PAGE_SIZE);
2460 void cifs_setsize(struct inode *inode, loff_t offset)
2462 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2464 spin_lock(&inode->i_lock);
2465 i_size_write(inode, offset);
2466 spin_unlock(&inode->i_lock);
2468 /* Cached inode must be refreshed on truncate */
2470 truncate_pagecache(inode, offset);
2474 cifs_set_file_size(struct inode *inode, struct iattr *attrs,
2475 unsigned int xid, char *full_path)
2478 struct cifsFileInfo *open_file;
2479 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2480 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2481 struct tcon_link *tlink = NULL;
2482 struct cifs_tcon *tcon = NULL;
2483 struct TCP_Server_Info *server;
2486 * To avoid spurious oplock breaks from server, in the case of
2487 * inodes that we already have open, avoid doing path based
2488 * setting of file size if we can do it by handle.
2489 * This keeps our caching token (oplock) and avoids timeouts
2490 * when the local oplock break takes longer to flush
2491 * writebehind data than the SMB timeout for the SetPathInfo
2492 * request would allow
2494 open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY);
2496 tcon = tlink_tcon(open_file->tlink);
2497 server = tcon->ses->server;
2498 if (server->ops->set_file_size)
2499 rc = server->ops->set_file_size(xid, tcon, open_file,
2500 attrs->ia_size, false);
2503 cifsFileInfo_put(open_file);
2504 cifs_dbg(FYI, "SetFSize for attrs rc = %d\n", rc);
2512 tlink = cifs_sb_tlink(cifs_sb);
2514 return PTR_ERR(tlink);
2515 tcon = tlink_tcon(tlink);
2516 server = tcon->ses->server;
2520 * Set file size by pathname rather than by handle either because no
2521 * valid, writeable file handle for it was found or because there was
2522 * an error setting it by handle.
2524 if (server->ops->set_path_size)
2525 rc = server->ops->set_path_size(xid, tcon, full_path,
2526 attrs->ia_size, cifs_sb, false);
2529 cifs_dbg(FYI, "SetEOF by path (setattrs) rc = %d\n", rc);
2532 cifs_put_tlink(tlink);
2536 cifsInode->server_eof = attrs->ia_size;
2537 cifs_setsize(inode, attrs->ia_size);
2538 cifs_truncate_page(inode->i_mapping, inode->i_size);
2545 cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
2549 char *full_path = NULL;
2550 struct inode *inode = d_inode(direntry);
2551 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2552 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2553 struct tcon_link *tlink;
2554 struct cifs_tcon *pTcon;
2555 struct cifs_unix_set_info_args *args = NULL;
2556 struct cifsFileInfo *open_file;
2558 cifs_dbg(FYI, "setattr_unix on file %pd attrs->ia_valid=0x%x\n",
2559 direntry, attrs->ia_valid);
2563 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
2564 attrs->ia_valid |= ATTR_FORCE;
2566 rc = setattr_prepare(direntry, attrs);
2570 full_path = build_path_from_dentry(direntry);
2571 if (full_path == NULL) {
2577 * Attempt to flush data before changing attributes. We need to do
2578 * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the
2579 * ownership or mode then we may also need to do this. Here, we take
2580 * the safe way out and just do the flush on all setattr requests. If
2581 * the flush returns error, store it to report later and continue.
2583 * BB: This should be smarter. Why bother flushing pages that
2584 * will be truncated anyway? Also, should we error out here if
2585 * the flush returns error?
2587 rc = filemap_write_and_wait(inode->i_mapping);
2588 if (is_interrupt_error(rc)) {
2593 mapping_set_error(inode->i_mapping, rc);
2596 if (attrs->ia_valid & ATTR_SIZE) {
2597 rc = cifs_set_file_size(inode, attrs, xid, full_path);
2602 /* skip mode change if it's just for clearing setuid/setgid */
2603 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
2604 attrs->ia_valid &= ~ATTR_MODE;
2606 args = kmalloc(sizeof(*args), GFP_KERNEL);
2612 /* set up the struct */
2613 if (attrs->ia_valid & ATTR_MODE)
2614 args->mode = attrs->ia_mode;
2616 args->mode = NO_CHANGE_64;
2618 if (attrs->ia_valid & ATTR_UID)
2619 args->uid = attrs->ia_uid;
2621 args->uid = INVALID_UID; /* no change */
2623 if (attrs->ia_valid & ATTR_GID)
2624 args->gid = attrs->ia_gid;
2626 args->gid = INVALID_GID; /* no change */
2628 if (attrs->ia_valid & ATTR_ATIME)
2629 args->atime = cifs_UnixTimeToNT(attrs->ia_atime);
2631 args->atime = NO_CHANGE_64;
2633 if (attrs->ia_valid & ATTR_MTIME)
2634 args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime);
2636 args->mtime = NO_CHANGE_64;
2638 if (attrs->ia_valid & ATTR_CTIME)
2639 args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime);
2641 args->ctime = NO_CHANGE_64;
2644 open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY);
2646 u16 nfid = open_file->fid.netfid;
2647 u32 npid = open_file->pid;
2648 pTcon = tlink_tcon(open_file->tlink);
2649 rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid);
2650 cifsFileInfo_put(open_file);
2652 tlink = cifs_sb_tlink(cifs_sb);
2653 if (IS_ERR(tlink)) {
2654 rc = PTR_ERR(tlink);
2657 pTcon = tlink_tcon(tlink);
2658 rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args,
2660 cifs_remap(cifs_sb));
2661 cifs_put_tlink(tlink);
2667 if ((attrs->ia_valid & ATTR_SIZE) &&
2668 attrs->ia_size != i_size_read(inode))
2669 truncate_setsize(inode, attrs->ia_size);
2671 setattr_copy(inode, attrs);
2672 mark_inode_dirty(inode);
2674 /* force revalidate when any of these times are set since some
2675 of the fs types (eg ext3, fat) do not have fine enough
2676 time granularity to match protocol, and we do not have a
2677 a way (yet) to query the server fs's time granularity (and
2678 whether it rounds times down).
2680 if (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME))
2681 cifsInode->time = 0;
2690 cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
2693 kuid_t uid = INVALID_UID;
2694 kgid_t gid = INVALID_GID;
2695 struct inode *inode = d_inode(direntry);
2696 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2697 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2698 struct cifsFileInfo *wfile;
2699 struct cifs_tcon *tcon;
2700 char *full_path = NULL;
2703 __u64 mode = NO_CHANGE_64;
2707 cifs_dbg(FYI, "setattr on file %pd attrs->ia_valid 0x%x\n",
2708 direntry, attrs->ia_valid);
2710 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
2711 attrs->ia_valid |= ATTR_FORCE;
2713 rc = setattr_prepare(direntry, attrs);
2719 full_path = build_path_from_dentry(direntry);
2720 if (full_path == NULL) {
2727 * Attempt to flush data before changing attributes. We need to do
2728 * this for ATTR_SIZE and ATTR_MTIME. If the flush of the data
2729 * returns error, store it to report later and continue.
2731 * BB: This should be smarter. Why bother flushing pages that
2732 * will be truncated anyway? Also, should we error out here if
2733 * the flush returns error? Do we need to check for ATTR_MTIME_SET flag?
2735 if (attrs->ia_valid & (ATTR_MTIME | ATTR_SIZE | ATTR_CTIME)) {
2736 rc = filemap_write_and_wait(inode->i_mapping);
2737 if (is_interrupt_error(rc)) {
2739 goto cifs_setattr_exit;
2741 mapping_set_error(inode->i_mapping, rc);
2746 if ((attrs->ia_valid & ATTR_MTIME) &&
2747 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) {
2748 rc = cifs_get_writable_file(cifsInode, FIND_WR_ANY, &wfile);
2750 tcon = tlink_tcon(wfile->tlink);
2751 rc = tcon->ses->server->ops->flush(xid, tcon, &wfile->fid);
2752 cifsFileInfo_put(wfile);
2754 goto cifs_setattr_exit;
2755 } else if (rc != -EBADF)
2756 goto cifs_setattr_exit;
2761 if (attrs->ia_valid & ATTR_SIZE) {
2762 rc = cifs_set_file_size(inode, attrs, xid, full_path);
2764 goto cifs_setattr_exit;
2767 if (attrs->ia_valid & ATTR_UID)
2768 uid = attrs->ia_uid;
2770 if (attrs->ia_valid & ATTR_GID)
2771 gid = attrs->ia_gid;
2773 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) ||
2774 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) {
2775 if (uid_valid(uid) || gid_valid(gid)) {
2776 rc = id_mode_to_cifs_acl(inode, full_path, NO_CHANGE_64,
2779 cifs_dbg(FYI, "%s: Setting id failed with error: %d\n",
2781 goto cifs_setattr_exit;
2785 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID))
2786 attrs->ia_valid &= ~(ATTR_UID | ATTR_GID);
2788 /* skip mode change if it's just for clearing setuid/setgid */
2789 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
2790 attrs->ia_valid &= ~ATTR_MODE;
2792 if (attrs->ia_valid & ATTR_MODE) {
2793 mode = attrs->ia_mode;
2795 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) ||
2796 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) {
2797 rc = id_mode_to_cifs_acl(inode, full_path, mode,
2798 INVALID_UID, INVALID_GID);
2800 cifs_dbg(FYI, "%s: Setting ACL failed with error: %d\n",
2802 goto cifs_setattr_exit;
2805 if (((mode & S_IWUGO) == 0) &&
2806 (cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
2808 dosattr = cifsInode->cifsAttrs | ATTR_READONLY;
2810 /* fix up mode if we're not using dynperm */
2811 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
2812 attrs->ia_mode = inode->i_mode & ~S_IWUGO;
2813 } else if ((mode & S_IWUGO) &&
2814 (cifsInode->cifsAttrs & ATTR_READONLY)) {
2816 dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
2817 /* Attributes of 0 are ignored */
2819 dosattr |= ATTR_NORMAL;
2821 /* reset local inode permissions to normal */
2822 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2823 attrs->ia_mode &= ~(S_IALLUGO);
2824 if (S_ISDIR(inode->i_mode))
2826 cifs_sb->mnt_dir_mode;
2829 cifs_sb->mnt_file_mode;
2831 } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2832 /* ignore mode change - ATTR_READONLY hasn't changed */
2833 attrs->ia_valid &= ~ATTR_MODE;
2837 if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) ||
2838 ((attrs->ia_valid & ATTR_MODE) && dosattr)) {
2839 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
2840 /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */
2842 /* Even if error on time set, no sense failing the call if
2843 the server would set the time to a reasonable value anyway,
2844 and this check ensures that we are not being called from
2845 sys_utimes in which case we ought to fail the call back to
2846 the user when the server rejects the call */
2847 if ((rc) && (attrs->ia_valid &
2848 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
2852 /* do not need local check to inode_check_ok since the server does
2855 goto cifs_setattr_exit;
2857 if ((attrs->ia_valid & ATTR_SIZE) &&
2858 attrs->ia_size != i_size_read(inode))
2859 truncate_setsize(inode, attrs->ia_size);
2861 setattr_copy(inode, attrs);
2862 mark_inode_dirty(inode);
2871 cifs_setattr(struct dentry *direntry, struct iattr *attrs)
2873 struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
2874 struct cifs_tcon *pTcon = cifs_sb_master_tcon(cifs_sb);
2876 if (pTcon->unix_ext)
2877 return cifs_setattr_unix(direntry, attrs);
2879 return cifs_setattr_nounix(direntry, attrs);
2881 /* BB: add cifs_setattr_legacy for really old servers */
2885 void cifs_delete_inode(struct inode *inode)
2887 cifs_dbg(FYI, "In cifs_delete_inode, inode = 0x%p\n", inode);
2888 /* may have to add back in if and when safe distributed caching of
2889 directories added e.g. via FindNotify */