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(inode_wrong_type(*pinode, fattr.cf_mode))) {
429 CIFS_I(*pinode)->time = 0; /* force reval */
434 cifs_fattr_to_inode(*pinode, &fattr);
442 cifs_sfu_type(struct cifs_fattr *fattr, const char *path,
443 struct cifs_sb_info *cifs_sb, unsigned int xid)
447 struct tcon_link *tlink;
448 struct cifs_tcon *tcon;
450 struct cifs_open_parms oparms;
451 struct cifs_io_parms io_parms = {0};
453 unsigned int bytes_read;
455 int buf_type = CIFS_NO_BUFFER;
459 fattr->cf_mode &= ~S_IFMT;
461 if (fattr->cf_eof == 0) {
462 fattr->cf_mode |= S_IFIFO;
463 fattr->cf_dtype = DT_FIFO;
465 } else if (fattr->cf_eof < 8) {
466 fattr->cf_mode |= S_IFREG;
467 fattr->cf_dtype = DT_REG;
468 return -EINVAL; /* EOPNOTSUPP? */
471 tlink = cifs_sb_tlink(cifs_sb);
473 return PTR_ERR(tlink);
474 tcon = tlink_tcon(tlink);
477 oparms.cifs_sb = cifs_sb;
478 oparms.desired_access = GENERIC_READ;
479 oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR);
480 oparms.disposition = FILE_OPEN;
483 oparms.reconnect = false;
485 if (tcon->ses->server->oplocks)
489 rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, NULL);
491 cifs_dbg(FYI, "check sfu type of %s, open rc = %d\n", path, rc);
492 cifs_put_tlink(tlink);
497 io_parms.netfid = fid.netfid;
498 io_parms.pid = current->tgid;
499 io_parms.tcon = tcon;
501 io_parms.length = 24;
503 rc = tcon->ses->server->ops->sync_read(xid, &fid, &io_parms,
504 &bytes_read, &pbuf, &buf_type);
505 if ((rc == 0) && (bytes_read >= 8)) {
506 if (memcmp("IntxBLK", pbuf, 8) == 0) {
507 cifs_dbg(FYI, "Block device\n");
508 fattr->cf_mode |= S_IFBLK;
509 fattr->cf_dtype = DT_BLK;
510 if (bytes_read == 24) {
511 /* we have enough to decode dev num */
512 __u64 mjr; /* major */
513 __u64 mnr; /* minor */
514 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
515 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
516 fattr->cf_rdev = MKDEV(mjr, mnr);
518 } else if (memcmp("IntxCHR", pbuf, 8) == 0) {
519 cifs_dbg(FYI, "Char device\n");
520 fattr->cf_mode |= S_IFCHR;
521 fattr->cf_dtype = DT_CHR;
522 if (bytes_read == 24) {
523 /* we have enough to decode dev num */
524 __u64 mjr; /* major */
525 __u64 mnr; /* minor */
526 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
527 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
528 fattr->cf_rdev = MKDEV(mjr, mnr);
530 } else if (memcmp("IntxLNK", pbuf, 7) == 0) {
531 cifs_dbg(FYI, "Symlink\n");
532 fattr->cf_mode |= S_IFLNK;
533 fattr->cf_dtype = DT_LNK;
535 fattr->cf_mode |= S_IFREG; /* file? */
536 fattr->cf_dtype = DT_REG;
540 fattr->cf_mode |= S_IFREG; /* then it is a file */
541 fattr->cf_dtype = DT_REG;
542 rc = -EOPNOTSUPP; /* or some unknown SFU type */
545 tcon->ses->server->ops->close(xid, tcon, &fid);
546 cifs_put_tlink(tlink);
550 #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
553 * Fetch mode bits as provided by SFU.
555 * FIXME: Doesn't this clobber the type bit we got from cifs_sfu_type ?
557 static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path,
558 struct cifs_sb_info *cifs_sb, unsigned int xid)
560 #ifdef CONFIG_CIFS_XATTR
564 struct tcon_link *tlink;
565 struct cifs_tcon *tcon;
567 tlink = cifs_sb_tlink(cifs_sb);
569 return PTR_ERR(tlink);
570 tcon = tlink_tcon(tlink);
572 if (tcon->ses->server->ops->query_all_EAs == NULL) {
573 cifs_put_tlink(tlink);
577 rc = tcon->ses->server->ops->query_all_EAs(xid, tcon, path,
578 "SETFILEBITS", ea_value, 4 /* size of buf */,
580 cifs_put_tlink(tlink);
584 mode = le32_to_cpu(*((__le32 *)ea_value));
585 fattr->cf_mode &= ~SFBITS_MASK;
586 cifs_dbg(FYI, "special bits 0%o org mode 0%o\n",
587 mode, fattr->cf_mode);
588 fattr->cf_mode = (mode & SFBITS_MASK) | fattr->cf_mode;
589 cifs_dbg(FYI, "special mode bits 0%o\n", mode);
598 /* Fill a cifs_fattr struct with info from POSIX info struct */
600 smb311_posix_info_to_fattr(struct cifs_fattr *fattr, struct smb311_posix_qinfo *info,
601 struct super_block *sb, bool adjust_tz, bool symlink)
603 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
604 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
606 memset(fattr, 0, sizeof(*fattr));
608 /* no fattr->flags to set */
609 fattr->cf_cifsattrs = le32_to_cpu(info->DosAttributes);
610 fattr->cf_uniqueid = le64_to_cpu(info->Inode);
612 if (info->LastAccessTime)
613 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
615 ktime_get_coarse_real_ts64(&fattr->cf_atime);
617 fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime);
618 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);
621 fattr->cf_ctime.tv_sec += tcon->ses->server->timeAdj;
622 fattr->cf_mtime.tv_sec += tcon->ses->server->timeAdj;
625 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
626 fattr->cf_bytes = le64_to_cpu(info->AllocationSize);
627 fattr->cf_createtime = le64_to_cpu(info->CreationTime);
629 fattr->cf_nlink = le32_to_cpu(info->HardLinks);
630 fattr->cf_mode = (umode_t) le32_to_cpu(info->Mode);
631 /* The srv fs device id is overridden on network mount so setting rdev isn't needed here */
632 /* fattr->cf_rdev = le32_to_cpu(info->DeviceId); */
635 fattr->cf_mode |= S_IFLNK;
636 fattr->cf_dtype = DT_LNK;
637 } else if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
638 fattr->cf_mode |= S_IFDIR;
639 fattr->cf_dtype = DT_DIR;
641 fattr->cf_mode |= S_IFREG;
642 fattr->cf_dtype = DT_REG;
644 /* else if reparse point ... TODO: add support for FIFO and blk dev; special file types */
646 fattr->cf_uid = cifs_sb->mnt_uid; /* TODO: map uid and gid from SID */
647 fattr->cf_gid = cifs_sb->mnt_gid;
649 cifs_dbg(FYI, "POSIX query info: mode 0x%x uniqueid 0x%llx nlink %d\n",
650 fattr->cf_mode, fattr->cf_uniqueid, fattr->cf_nlink);
654 /* Fill a cifs_fattr struct with info from FILE_ALL_INFO */
656 cifs_all_info_to_fattr(struct cifs_fattr *fattr, FILE_ALL_INFO *info,
657 struct super_block *sb, bool adjust_tz,
658 bool symlink, u32 reparse_tag)
660 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
661 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
663 memset(fattr, 0, sizeof(*fattr));
664 fattr->cf_cifsattrs = le32_to_cpu(info->Attributes);
665 if (info->DeletePending)
666 fattr->cf_flags |= CIFS_FATTR_DELETE_PENDING;
668 if (info->LastAccessTime)
669 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
671 ktime_get_coarse_real_ts64(&fattr->cf_atime);
673 fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime);
674 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);
677 fattr->cf_ctime.tv_sec += tcon->ses->server->timeAdj;
678 fattr->cf_mtime.tv_sec += tcon->ses->server->timeAdj;
681 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
682 fattr->cf_bytes = le64_to_cpu(info->AllocationSize);
683 fattr->cf_createtime = le64_to_cpu(info->CreationTime);
685 fattr->cf_nlink = le32_to_cpu(info->NumberOfLinks);
686 if (reparse_tag == IO_REPARSE_TAG_LX_SYMLINK) {
687 fattr->cf_mode |= S_IFLNK | cifs_sb->mnt_file_mode;
688 fattr->cf_dtype = DT_LNK;
689 } else if (reparse_tag == IO_REPARSE_TAG_LX_FIFO) {
690 fattr->cf_mode |= S_IFIFO | cifs_sb->mnt_file_mode;
691 fattr->cf_dtype = DT_FIFO;
692 } else if (reparse_tag == IO_REPARSE_TAG_AF_UNIX) {
693 fattr->cf_mode |= S_IFSOCK | cifs_sb->mnt_file_mode;
694 fattr->cf_dtype = DT_SOCK;
695 } else if (reparse_tag == IO_REPARSE_TAG_LX_CHR) {
696 fattr->cf_mode |= S_IFCHR | cifs_sb->mnt_file_mode;
697 fattr->cf_dtype = DT_CHR;
698 } else if (reparse_tag == IO_REPARSE_TAG_LX_BLK) {
699 fattr->cf_mode |= S_IFBLK | cifs_sb->mnt_file_mode;
700 fattr->cf_dtype = DT_BLK;
701 } else if (symlink) { /* TODO add more reparse tag checks */
702 fattr->cf_mode = S_IFLNK;
703 fattr->cf_dtype = DT_LNK;
704 } else if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
705 fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode;
706 fattr->cf_dtype = DT_DIR;
708 * Server can return wrong NumberOfLinks value for directories
709 * when Unix extensions are disabled - fake it.
712 fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK;
714 fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode;
715 fattr->cf_dtype = DT_REG;
717 /* clear write bits if ATTR_READONLY is set */
718 if (fattr->cf_cifsattrs & ATTR_READONLY)
719 fattr->cf_mode &= ~(S_IWUGO);
722 * Don't accept zero nlink from non-unix servers unless
723 * delete is pending. Instead mark it as unknown.
725 if ((fattr->cf_nlink < 1) && !tcon->unix_ext &&
726 !info->DeletePending) {
727 cifs_dbg(VFS, "bogus file nlink value %u\n",
729 fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK;
733 fattr->cf_uid = cifs_sb->mnt_uid;
734 fattr->cf_gid = cifs_sb->mnt_gid;
738 cifs_get_file_info(struct file *filp)
742 FILE_ALL_INFO find_data;
743 struct cifs_fattr fattr;
744 struct inode *inode = file_inode(filp);
745 struct cifsFileInfo *cfile = filp->private_data;
746 struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
747 struct TCP_Server_Info *server = tcon->ses->server;
749 if (!server->ops->query_file_info)
753 rc = server->ops->query_file_info(xid, tcon, &cfile->fid, &find_data);
756 /* TODO: add support to query reparse tag */
757 cifs_all_info_to_fattr(&fattr, &find_data, inode->i_sb, false,
758 false, 0 /* no reparse tag */);
761 cifs_create_dfs_fattr(&fattr, inode->i_sb);
767 * FIXME: legacy server -- fall back to path-based call?
768 * for now, just skip revalidating and mark inode for
772 CIFS_I(inode)->time = 0;
778 * don't bother with SFU junk here -- just mark inode as needing
781 fattr.cf_uniqueid = CIFS_I(inode)->uniqueid;
782 fattr.cf_flags |= CIFS_FATTR_NEED_REVAL;
783 cifs_fattr_to_inode(inode, &fattr);
789 /* Simple function to return a 64 bit hash of string. Rarely called */
790 static __u64 simple_hashstr(const char *str)
792 const __u64 hash_mult = 1125899906842597ULL; /* a big enough prime */
796 hash = (hash + (__u64) *str++) * hash_mult;
802 * cifs_backup_query_path_info - SMB1 fallback code to get ino
804 * Fallback code to get file metadata when we don't have access to
805 * @full_path (EACCES) and have backup creds.
807 * @data will be set to search info result buffer
808 * @resp_buf will be set to cifs resp buf and needs to be freed with
809 * cifs_buf_release() when done with @data.
812 cifs_backup_query_path_info(int xid,
813 struct cifs_tcon *tcon,
814 struct super_block *sb,
815 const char *full_path,
817 FILE_ALL_INFO **data)
819 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
820 struct cifs_search_info info = {0};
825 info.endOfSearch = false;
827 info.info_level = SMB_FIND_FILE_UNIX;
828 else if ((tcon->ses->capabilities &
829 tcon->ses->server->vals->cap_nt_find) == 0)
830 info.info_level = SMB_FIND_FILE_INFO_STANDARD;
831 else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
832 info.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
833 else /* no srvino useful for fallback to some netapp */
834 info.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
836 flags = CIFS_SEARCH_CLOSE_ALWAYS |
837 CIFS_SEARCH_CLOSE_AT_END |
838 CIFS_SEARCH_BACKUP_SEARCH;
840 rc = CIFSFindFirst(xid, tcon, full_path,
841 cifs_sb, NULL, flags, &info, false);
845 *resp_buf = (void *)info.ntwrk_buf_start;
846 *data = (FILE_ALL_INFO *)info.srch_entries_start;
851 cifs_set_fattr_ino(int xid,
852 struct cifs_tcon *tcon,
853 struct super_block *sb,
854 struct inode **inode,
855 const char *full_path,
857 struct cifs_fattr *fattr)
859 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
860 struct TCP_Server_Info *server = tcon->ses->server;
863 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
865 fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid;
867 fattr->cf_uniqueid = iunique(sb, ROOT_I);
872 * If we have an inode pass a NULL tcon to ensure we don't
873 * make a round trip to the server. This only works for SMB2+.
875 rc = server->ops->get_srv_inum(xid,
876 *inode ? NULL : tcon,
882 * If that fails reuse existing ino or generate one
883 * and disable server ones
886 fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid;
888 fattr->cf_uniqueid = iunique(sb, ROOT_I);
889 cifs_autodisable_serverino(cifs_sb);
894 /* If no errors, check for zero root inode (invalid) */
895 if (fattr->cf_uniqueid == 0 && strlen(full_path) == 0) {
896 cifs_dbg(FYI, "Invalid (0) inodenum\n");
899 fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid;
901 /* make an ino by hashing the UNC */
902 fattr->cf_flags |= CIFS_FATTR_FAKE_ROOT_INO;
903 fattr->cf_uniqueid = simple_hashstr(tcon->treeName);
908 static inline bool is_inode_cache_good(struct inode *ino)
910 return ino && CIFS_CACHE_READ(CIFS_I(ino)) && CIFS_I(ino)->time != 0;
914 cifs_get_inode_info(struct inode **inode,
915 const char *full_path,
916 FILE_ALL_INFO *in_data,
917 struct super_block *sb, int xid,
918 const struct cifs_fid *fid)
921 struct cifs_tcon *tcon;
922 struct TCP_Server_Info *server;
923 struct tcon_link *tlink;
924 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
925 bool adjust_tz = false;
926 struct cifs_fattr fattr = {0};
927 bool is_reparse_point = false;
928 FILE_ALL_INFO *data = in_data;
929 FILE_ALL_INFO *tmp_data = NULL;
930 void *smb1_backup_rsp_buf = NULL;
933 __u32 reparse_tag = 0;
935 tlink = cifs_sb_tlink(cifs_sb);
937 return PTR_ERR(tlink);
938 tcon = tlink_tcon(tlink);
939 server = tcon->ses->server;
942 * 1. Fetch file metadata if not provided (data)
946 if (is_inode_cache_good(*inode)) {
947 cifs_dbg(FYI, "No need to revalidate cached inode sizes\n");
950 tmp_data = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
955 rc = server->ops->query_path_info(xid, tcon, cifs_sb,
957 &adjust_tz, &is_reparse_point);
962 * 2. Convert it to internal cifs metadata (fattr)
968 * If the file is a reparse point, it is more complicated
969 * since we have to check if its reparse tag matches a known
970 * special file type e.g. symlink or fifo or char etc.
972 if ((le32_to_cpu(data->Attributes) & ATTR_REPARSE) &&
973 server->ops->query_reparse_tag) {
974 rc = server->ops->query_reparse_tag(xid, tcon, cifs_sb,
975 full_path, &reparse_tag);
976 cifs_dbg(FYI, "reparse tag 0x%x\n", reparse_tag);
978 cifs_all_info_to_fattr(&fattr, data, sb, adjust_tz,
979 is_reparse_point, reparse_tag);
982 /* DFS link, no metadata available on this server */
983 cifs_create_dfs_fattr(&fattr, sb);
988 * perm errors, try again with backup flags if possible
990 * For SMB2 and later the backup intent flag
991 * is already sent if needed on open and there
992 * is no path based FindFirst operation to use
995 if (backup_cred(cifs_sb) && is_smb1_server(server)) {
996 /* for easier reading */
997 FILE_DIRECTORY_INFO *fdi;
998 SEARCH_ID_FULL_DIR_INFO *si;
1000 rc = cifs_backup_query_path_info(xid, tcon, sb,
1002 &smb1_backup_rsp_buf,
1007 fdi = (FILE_DIRECTORY_INFO *)data;
1008 si = (SEARCH_ID_FULL_DIR_INFO *)data;
1010 cifs_dir_info_to_fattr(&fattr, fdi, cifs_sb);
1011 fattr.cf_uniqueid = le64_to_cpu(si->UniqueId);
1012 /* uniqueid set, skip get inum step */
1013 goto handle_mnt_opt;
1015 /* nothing we can do, bail out */
1020 cifs_dbg(FYI, "%s: unhandled err rc %d\n", __func__, rc);
1025 * 3. Get or update inode number (fattr.cf_uniqueid)
1028 cifs_set_fattr_ino(xid, tcon, sb, inode, full_path, data, &fattr);
1031 * 4. Tweak fattr based on mount options
1035 /* query for SFU type info if supported and needed */
1036 if (fattr.cf_cifsattrs & ATTR_SYSTEM &&
1037 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
1038 tmprc = cifs_sfu_type(&fattr, full_path, cifs_sb, xid);
1040 cifs_dbg(FYI, "cifs_sfu_type failed: %d\n", tmprc);
1043 /* fill in 0777 bits from ACL */
1044 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID) {
1045 rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, true,
1050 cifs_dbg(FYI, "%s: Get mode from SID failed. rc=%d\n",
1054 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
1055 rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, false,
1060 cifs_dbg(FYI, "%s: Getting ACL failed with error: %d\n",
1066 /* fill in remaining high mode bits e.g. SUID, VTX */
1067 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
1068 cifs_sfu_mode(&fattr, full_path, cifs_sb, xid);
1070 /* check for Minshall+French symlinks */
1071 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
1072 tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr,
1075 cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc);
1079 * 5. Update inode with final fattr data
1083 *inode = cifs_iget(sb, &fattr);
1087 /* we already have inode, update it */
1089 /* if uniqueid is different, return error */
1090 if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM &&
1091 CIFS_I(*inode)->uniqueid != fattr.cf_uniqueid)) {
1092 CIFS_I(*inode)->time = 0; /* force reval */
1097 /* if filetype is different, return error */
1098 if (unlikely(((*inode)->i_mode & S_IFMT) !=
1099 (fattr.cf_mode & S_IFMT))) {
1100 CIFS_I(*inode)->time = 0; /* force reval */
1105 cifs_fattr_to_inode(*inode, &fattr);
1108 cifs_buf_release(smb1_backup_rsp_buf);
1109 cifs_put_tlink(tlink);
1115 smb311_posix_get_inode_info(struct inode **inode,
1116 const char *full_path,
1117 struct super_block *sb, unsigned int xid)
1119 struct cifs_tcon *tcon;
1120 struct tcon_link *tlink;
1121 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1122 bool adjust_tz = false;
1123 struct cifs_fattr fattr = {0};
1124 bool symlink = false;
1125 struct smb311_posix_qinfo *data = NULL;
1129 tlink = cifs_sb_tlink(cifs_sb);
1131 return PTR_ERR(tlink);
1132 tcon = tlink_tcon(tlink);
1135 * 1. Fetch file metadata
1138 if (is_inode_cache_good(*inode)) {
1139 cifs_dbg(FYI, "No need to revalidate cached inode sizes\n");
1142 data = kmalloc(sizeof(struct smb311_posix_qinfo), GFP_KERNEL);
1148 rc = smb311_posix_query_path_info(xid, tcon, cifs_sb,
1150 &adjust_tz, &symlink);
1153 * 2. Convert it to internal cifs metadata (fattr)
1158 smb311_posix_info_to_fattr(&fattr, data, sb, adjust_tz, symlink);
1161 /* DFS link, no metadata available on this server */
1162 cifs_create_dfs_fattr(&fattr, sb);
1167 * For SMB2 and later the backup intent flag
1168 * is already sent if needed on open and there
1169 * is no path based FindFirst operation to use
1170 * to retry with so nothing we can do, bail out
1174 cifs_dbg(FYI, "%s: unhandled err rc %d\n", __func__, rc);
1180 * 3. Tweak fattr based on mount options
1183 /* check for Minshall+French symlinks */
1184 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
1185 tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr,
1188 cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc);
1192 * 4. Update inode with final fattr data
1196 *inode = cifs_iget(sb, &fattr);
1200 /* we already have inode, update it */
1202 /* if uniqueid is different, return error */
1203 if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM &&
1204 CIFS_I(*inode)->uniqueid != fattr.cf_uniqueid)) {
1205 CIFS_I(*inode)->time = 0; /* force reval */
1210 /* if filetype is different, return error */
1211 if (unlikely(((*inode)->i_mode & S_IFMT) !=
1212 (fattr.cf_mode & S_IFMT))) {
1213 CIFS_I(*inode)->time = 0; /* force reval */
1218 cifs_fattr_to_inode(*inode, &fattr);
1221 cifs_put_tlink(tlink);
1227 static const struct inode_operations cifs_ipc_inode_ops = {
1228 .lookup = cifs_lookup,
1232 cifs_find_inode(struct inode *inode, void *opaque)
1234 struct cifs_fattr *fattr = (struct cifs_fattr *) opaque;
1236 /* don't match inode with different uniqueid */
1237 if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid)
1240 /* use createtime like an i_generation field */
1241 if (CIFS_I(inode)->createtime != fattr->cf_createtime)
1244 /* don't match inode of different type */
1245 if (inode_wrong_type(inode, fattr->cf_mode))
1248 /* if it's not a directory or has no dentries, then flag it */
1249 if (S_ISDIR(inode->i_mode) && !hlist_empty(&inode->i_dentry))
1250 fattr->cf_flags |= CIFS_FATTR_INO_COLLISION;
1256 cifs_init_inode(struct inode *inode, void *opaque)
1258 struct cifs_fattr *fattr = (struct cifs_fattr *) opaque;
1260 CIFS_I(inode)->uniqueid = fattr->cf_uniqueid;
1261 CIFS_I(inode)->createtime = fattr->cf_createtime;
1266 * walk dentry list for an inode and report whether it has aliases that
1267 * are hashed. We use this to determine if a directory inode can actually
1271 inode_has_hashed_dentries(struct inode *inode)
1273 struct dentry *dentry;
1275 spin_lock(&inode->i_lock);
1276 hlist_for_each_entry(dentry, &inode->i_dentry, d_u.d_alias) {
1277 if (!d_unhashed(dentry) || IS_ROOT(dentry)) {
1278 spin_unlock(&inode->i_lock);
1282 spin_unlock(&inode->i_lock);
1286 /* Given fattrs, get a corresponding inode */
1288 cifs_iget(struct super_block *sb, struct cifs_fattr *fattr)
1291 struct inode *inode;
1294 cifs_dbg(FYI, "looking for uniqueid=%llu\n", fattr->cf_uniqueid);
1296 /* hash down to 32-bits on 32-bit arch */
1297 hash = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid);
1299 inode = iget5_locked(sb, hash, cifs_find_inode, cifs_init_inode, fattr);
1301 /* was there a potentially problematic inode collision? */
1302 if (fattr->cf_flags & CIFS_FATTR_INO_COLLISION) {
1303 fattr->cf_flags &= ~CIFS_FATTR_INO_COLLISION;
1305 if (inode_has_hashed_dentries(inode)) {
1306 cifs_autodisable_serverino(CIFS_SB(sb));
1308 fattr->cf_uniqueid = iunique(sb, ROOT_I);
1309 goto retry_iget5_locked;
1313 cifs_fattr_to_inode(inode, fattr);
1314 if (sb->s_flags & SB_NOATIME)
1315 inode->i_flags |= S_NOATIME | S_NOCMTIME;
1316 if (inode->i_state & I_NEW) {
1317 inode->i_ino = hash;
1318 #ifdef CONFIG_CIFS_FSCACHE
1319 /* initialize per-inode cache cookie pointer */
1320 CIFS_I(inode)->fscache = NULL;
1322 unlock_new_inode(inode);
1329 /* gets root inode */
1330 struct inode *cifs_root_iget(struct super_block *sb)
1333 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1334 struct inode *inode = NULL;
1336 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
1340 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH)
1341 && cifs_sb->prepath) {
1342 len = strlen(cifs_sb->prepath);
1343 path = kzalloc(len + 2 /* leading sep + null */, GFP_KERNEL);
1345 return ERR_PTR(-ENOMEM);
1347 memcpy(path+1, cifs_sb->prepath, len);
1349 path = kstrdup("", GFP_KERNEL);
1351 return ERR_PTR(-ENOMEM);
1355 if (tcon->unix_ext) {
1356 rc = cifs_get_inode_info_unix(&inode, path, sb, xid);
1357 /* some servers mistakenly claim POSIX support */
1358 if (rc != -EOPNOTSUPP)
1360 cifs_dbg(VFS, "server does not support POSIX extensions\n");
1361 tcon->unix_ext = false;
1364 convert_delimiter(path, CIFS_DIR_SEP(cifs_sb));
1365 if (tcon->posix_extensions)
1366 rc = smb311_posix_get_inode_info(&inode, path, sb, xid);
1368 rc = cifs_get_inode_info(&inode, path, NULL, sb, xid, NULL);
1372 inode = ERR_PTR(rc);
1376 #ifdef CONFIG_CIFS_FSCACHE
1377 /* populate tcon->resource_id */
1378 tcon->resource_id = CIFS_I(inode)->uniqueid;
1381 if (rc && tcon->pipe) {
1382 cifs_dbg(FYI, "ipc connection - fake read inode\n");
1383 spin_lock(&inode->i_lock);
1384 inode->i_mode |= S_IFDIR;
1385 set_nlink(inode, 2);
1386 inode->i_op = &cifs_ipc_inode_ops;
1387 inode->i_fop = &simple_dir_operations;
1388 inode->i_uid = cifs_sb->mnt_uid;
1389 inode->i_gid = cifs_sb->mnt_gid;
1390 spin_unlock(&inode->i_lock);
1393 inode = ERR_PTR(rc);
1403 cifs_set_file_info(struct inode *inode, struct iattr *attrs, unsigned int xid,
1404 char *full_path, __u32 dosattr)
1406 bool set_time = false;
1407 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1408 struct TCP_Server_Info *server;
1409 FILE_BASIC_INFO info_buf;
1414 server = cifs_sb_master_tcon(cifs_sb)->ses->server;
1415 if (!server->ops->set_file_info)
1420 if (attrs->ia_valid & ATTR_ATIME) {
1422 info_buf.LastAccessTime =
1423 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1425 info_buf.LastAccessTime = 0;
1427 if (attrs->ia_valid & ATTR_MTIME) {
1429 info_buf.LastWriteTime =
1430 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1432 info_buf.LastWriteTime = 0;
1435 * Samba throws this field away, but windows may actually use it.
1436 * Do not set ctime unless other time stamps are changed explicitly
1437 * (i.e. by utimes()) since we would then have a mix of client and
1440 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1441 cifs_dbg(FYI, "CIFS - CTIME changed\n");
1442 info_buf.ChangeTime =
1443 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1445 info_buf.ChangeTime = 0;
1447 info_buf.CreationTime = 0; /* don't change */
1448 info_buf.Attributes = cpu_to_le32(dosattr);
1450 return server->ops->set_file_info(inode, full_path, &info_buf, xid);
1454 * Open the given file (if it isn't already), set the DELETE_ON_CLOSE bit
1455 * and rename it to a random name that hopefully won't conflict with
1459 cifs_rename_pending_delete(const char *full_path, struct dentry *dentry,
1460 const unsigned int xid)
1464 struct cifs_fid fid;
1465 struct cifs_open_parms oparms;
1466 struct inode *inode = d_inode(dentry);
1467 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1468 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1469 struct tcon_link *tlink;
1470 struct cifs_tcon *tcon;
1471 __u32 dosattr, origattr;
1472 FILE_BASIC_INFO *info_buf = NULL;
1474 tlink = cifs_sb_tlink(cifs_sb);
1476 return PTR_ERR(tlink);
1477 tcon = tlink_tcon(tlink);
1480 * We cannot rename the file if the server doesn't support
1481 * CAP_INFOLEVEL_PASSTHRU
1483 if (!(tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)) {
1489 oparms.cifs_sb = cifs_sb;
1490 oparms.desired_access = DELETE | FILE_WRITE_ATTRIBUTES;
1491 oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR);
1492 oparms.disposition = FILE_OPEN;
1493 oparms.path = full_path;
1495 oparms.reconnect = false;
1497 rc = CIFS_open(xid, &oparms, &oplock, NULL);
1501 origattr = cifsInode->cifsAttrs;
1503 origattr |= ATTR_NORMAL;
1505 dosattr = origattr & ~ATTR_READONLY;
1507 dosattr |= ATTR_NORMAL;
1508 dosattr |= ATTR_HIDDEN;
1510 /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */
1511 if (dosattr != origattr) {
1512 info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL);
1513 if (info_buf == NULL) {
1517 info_buf->Attributes = cpu_to_le32(dosattr);
1518 rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid,
1520 /* although we would like to mark the file hidden
1521 if that fails we will still try to rename it */
1523 cifsInode->cifsAttrs = dosattr;
1525 dosattr = origattr; /* since not able to change them */
1528 /* rename the file */
1529 rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, NULL,
1531 cifs_remap(cifs_sb));
1537 /* try to set DELETE_ON_CLOSE */
1538 if (!test_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags)) {
1539 rc = CIFSSMBSetFileDisposition(xid, tcon, true, fid.netfid,
1542 * some samba versions return -ENOENT when we try to set the
1543 * file disposition here. Likely a samba bug, but work around
1544 * it for now. This means that some cifsXXX files may hang
1545 * around after they shouldn't.
1547 * BB: remove this hack after more servers have the fix
1555 set_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags);
1559 CIFSSMBClose(xid, tcon, fid.netfid);
1562 cifs_put_tlink(tlink);
1566 * reset everything back to the original state. Don't bother
1567 * dealing with errors here since we can't do anything about
1571 CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, dentry->d_name.name,
1572 cifs_sb->local_nls, cifs_remap(cifs_sb));
1574 if (dosattr != origattr) {
1575 info_buf->Attributes = cpu_to_le32(origattr);
1576 if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid,
1578 cifsInode->cifsAttrs = origattr;
1584 /* copied from fs/nfs/dir.c with small changes */
1586 cifs_drop_nlink(struct inode *inode)
1588 spin_lock(&inode->i_lock);
1589 if (inode->i_nlink > 0)
1591 spin_unlock(&inode->i_lock);
1595 * If d_inode(dentry) is null (usually meaning the cached dentry
1596 * is a negative dentry) then we would attempt a standard SMB delete, but
1597 * if that fails we can not attempt the fall back mechanisms on EACCES
1598 * but will return the EACCES to the caller. Note that the VFS does not call
1599 * unlink on negative dentries currently.
1601 int cifs_unlink(struct inode *dir, struct dentry *dentry)
1605 char *full_path = NULL;
1606 struct inode *inode = d_inode(dentry);
1607 struct cifsInodeInfo *cifs_inode;
1608 struct super_block *sb = dir->i_sb;
1609 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1610 struct tcon_link *tlink;
1611 struct cifs_tcon *tcon;
1612 struct TCP_Server_Info *server;
1613 struct iattr *attrs = NULL;
1614 __u32 dosattr = 0, origattr = 0;
1616 cifs_dbg(FYI, "cifs_unlink, dir=0x%p, dentry=0x%p\n", dir, dentry);
1618 tlink = cifs_sb_tlink(cifs_sb);
1620 return PTR_ERR(tlink);
1621 tcon = tlink_tcon(tlink);
1622 server = tcon->ses->server;
1626 if (tcon->nodelete) {
1631 /* Unlink can be called from rename so we can not take the
1632 * sb->s_vfs_rename_mutex here */
1633 full_path = build_path_from_dentry(dentry);
1634 if (full_path == NULL) {
1639 if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1640 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1641 rc = CIFSPOSIXDelFile(xid, tcon, full_path,
1642 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
1643 cifs_remap(cifs_sb));
1644 cifs_dbg(FYI, "posix del rc %d\n", rc);
1645 if ((rc == 0) || (rc == -ENOENT))
1646 goto psx_del_no_retry;
1650 if (!server->ops->unlink) {
1652 goto psx_del_no_retry;
1655 rc = server->ops->unlink(xid, tcon, full_path, cifs_sb);
1660 cifs_drop_nlink(inode);
1661 } else if (rc == -ENOENT) {
1663 } else if (rc == -EBUSY) {
1664 if (server->ops->rename_pending_delete) {
1665 rc = server->ops->rename_pending_delete(full_path,
1668 cifs_drop_nlink(inode);
1670 } else if ((rc == -EACCES) && (dosattr == 0) && inode) {
1671 attrs = kzalloc(sizeof(*attrs), GFP_KERNEL);
1672 if (attrs == NULL) {
1677 /* try to reset dos attributes */
1678 cifs_inode = CIFS_I(inode);
1679 origattr = cifs_inode->cifsAttrs;
1681 origattr |= ATTR_NORMAL;
1682 dosattr = origattr & ~ATTR_READONLY;
1684 dosattr |= ATTR_NORMAL;
1685 dosattr |= ATTR_HIDDEN;
1687 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
1691 goto retry_std_delete;
1694 /* undo the setattr if we errored out and it's needed */
1695 if (rc != 0 && dosattr != 0)
1696 cifs_set_file_info(inode, attrs, xid, full_path, origattr);
1700 cifs_inode = CIFS_I(inode);
1701 cifs_inode->time = 0; /* will force revalidate to get info
1703 inode->i_ctime = current_time(inode);
1705 dir->i_ctime = dir->i_mtime = current_time(dir);
1706 cifs_inode = CIFS_I(dir);
1707 CIFS_I(dir)->time = 0; /* force revalidate of dir as well */
1712 cifs_put_tlink(tlink);
1717 cifs_mkdir_qinfo(struct inode *parent, struct dentry *dentry, umode_t mode,
1718 const char *full_path, struct cifs_sb_info *cifs_sb,
1719 struct cifs_tcon *tcon, const unsigned int xid)
1722 struct inode *inode = NULL;
1724 if (tcon->posix_extensions)
1725 rc = smb311_posix_get_inode_info(&inode, full_path, parent->i_sb, xid);
1726 else if (tcon->unix_ext)
1727 rc = cifs_get_inode_info_unix(&inode, full_path, parent->i_sb,
1730 rc = cifs_get_inode_info(&inode, full_path, NULL, parent->i_sb,
1737 * setting nlink not necessary except in cases where we failed to get it
1738 * from the server or was set bogus. Also, since this is a brand new
1739 * inode, no need to grab the i_lock before setting the i_nlink.
1741 if (inode->i_nlink < 2)
1742 set_nlink(inode, 2);
1743 mode &= ~current_umask();
1744 /* must turn on setgid bit if parent dir has it */
1745 if (parent->i_mode & S_ISGID)
1748 if (tcon->unix_ext) {
1749 struct cifs_unix_set_info_args args = {
1751 .ctime = NO_CHANGE_64,
1752 .atime = NO_CHANGE_64,
1753 .mtime = NO_CHANGE_64,
1756 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1757 args.uid = current_fsuid();
1758 if (parent->i_mode & S_ISGID)
1759 args.gid = parent->i_gid;
1761 args.gid = current_fsgid();
1763 args.uid = INVALID_UID; /* no change */
1764 args.gid = INVALID_GID; /* no change */
1766 CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args,
1768 cifs_remap(cifs_sb));
1770 struct TCP_Server_Info *server = tcon->ses->server;
1771 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
1772 (mode & S_IWUGO) == 0 && server->ops->mkdir_setinfo)
1773 server->ops->mkdir_setinfo(inode, full_path, cifs_sb,
1775 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
1776 inode->i_mode = (mode | S_IFDIR);
1778 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1779 inode->i_uid = current_fsuid();
1780 if (inode->i_mode & S_ISGID)
1781 inode->i_gid = parent->i_gid;
1783 inode->i_gid = current_fsgid();
1786 d_instantiate(dentry, inode);
1791 cifs_posix_mkdir(struct inode *inode, struct dentry *dentry, umode_t mode,
1792 const char *full_path, struct cifs_sb_info *cifs_sb,
1793 struct cifs_tcon *tcon, const unsigned int xid)
1797 FILE_UNIX_BASIC_INFO *info = NULL;
1798 struct inode *newinode = NULL;
1799 struct cifs_fattr fattr;
1801 info = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1804 goto posix_mkdir_out;
1807 mode &= ~current_umask();
1808 rc = CIFSPOSIXCreate(xid, tcon, SMB_O_DIRECTORY | SMB_O_CREAT, mode,
1809 NULL /* netfid */, info, &oplock, full_path,
1810 cifs_sb->local_nls, cifs_remap(cifs_sb));
1811 if (rc == -EOPNOTSUPP)
1812 goto posix_mkdir_out;
1814 cifs_dbg(FYI, "posix mkdir returned 0x%x\n", rc);
1816 goto posix_mkdir_out;
1819 if (info->Type == cpu_to_le32(-1))
1820 /* no return info, go query for it */
1821 goto posix_mkdir_get_info;
1823 * BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if
1824 * need to set uid/gid.
1827 cifs_unix_basic_to_fattr(&fattr, info, cifs_sb);
1828 cifs_fill_uniqueid(inode->i_sb, &fattr);
1829 newinode = cifs_iget(inode->i_sb, &fattr);
1831 goto posix_mkdir_get_info;
1833 d_instantiate(dentry, newinode);
1835 #ifdef CONFIG_CIFS_DEBUG2
1836 cifs_dbg(FYI, "instantiated dentry %p %pd to inode %p\n",
1837 dentry, dentry, newinode);
1839 if (newinode->i_nlink != 2)
1840 cifs_dbg(FYI, "unexpected number of links %d\n",
1847 posix_mkdir_get_info:
1848 rc = cifs_mkdir_qinfo(inode, dentry, mode, full_path, cifs_sb, tcon,
1850 goto posix_mkdir_out;
1853 int cifs_mkdir(struct inode *inode, struct dentry *direntry, umode_t mode)
1857 struct cifs_sb_info *cifs_sb;
1858 struct tcon_link *tlink;
1859 struct cifs_tcon *tcon;
1860 struct TCP_Server_Info *server;
1863 cifs_dbg(FYI, "In cifs_mkdir, mode = %04ho inode = 0x%p\n",
1866 cifs_sb = CIFS_SB(inode->i_sb);
1867 tlink = cifs_sb_tlink(cifs_sb);
1869 return PTR_ERR(tlink);
1870 tcon = tlink_tcon(tlink);
1874 full_path = build_path_from_dentry(direntry);
1875 if (full_path == NULL) {
1880 server = tcon->ses->server;
1882 if ((server->ops->posix_mkdir) && (tcon->posix_extensions)) {
1883 rc = server->ops->posix_mkdir(xid, inode, mode, tcon, full_path,
1885 d_drop(direntry); /* for time being always refresh inode info */
1889 if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1890 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1891 rc = cifs_posix_mkdir(inode, direntry, mode, full_path, cifs_sb,
1893 if (rc != -EOPNOTSUPP)
1897 if (!server->ops->mkdir) {
1902 /* BB add setting the equivalent of mode via CreateX w/ACLs */
1903 rc = server->ops->mkdir(xid, inode, mode, tcon, full_path, cifs_sb);
1905 cifs_dbg(FYI, "cifs_mkdir returned 0x%x\n", rc);
1910 /* TODO: skip this for smb2/smb3 */
1911 rc = cifs_mkdir_qinfo(inode, direntry, mode, full_path, cifs_sb, tcon,
1915 * Force revalidate to get parent dir info when needed since cached
1916 * attributes are invalid now.
1918 CIFS_I(inode)->time = 0;
1921 cifs_put_tlink(tlink);
1925 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1929 struct cifs_sb_info *cifs_sb;
1930 struct tcon_link *tlink;
1931 struct cifs_tcon *tcon;
1932 struct TCP_Server_Info *server;
1933 char *full_path = NULL;
1934 struct cifsInodeInfo *cifsInode;
1936 cifs_dbg(FYI, "cifs_rmdir, inode = 0x%p\n", inode);
1940 full_path = build_path_from_dentry(direntry);
1941 if (full_path == NULL) {
1946 cifs_sb = CIFS_SB(inode->i_sb);
1947 tlink = cifs_sb_tlink(cifs_sb);
1948 if (IS_ERR(tlink)) {
1949 rc = PTR_ERR(tlink);
1952 tcon = tlink_tcon(tlink);
1953 server = tcon->ses->server;
1955 if (!server->ops->rmdir) {
1957 cifs_put_tlink(tlink);
1961 if (tcon->nodelete) {
1963 cifs_put_tlink(tlink);
1967 rc = server->ops->rmdir(xid, tcon, full_path, cifs_sb);
1968 cifs_put_tlink(tlink);
1971 spin_lock(&d_inode(direntry)->i_lock);
1972 i_size_write(d_inode(direntry), 0);
1973 clear_nlink(d_inode(direntry));
1974 spin_unlock(&d_inode(direntry)->i_lock);
1977 cifsInode = CIFS_I(d_inode(direntry));
1978 /* force revalidate to go get info when needed */
1979 cifsInode->time = 0;
1981 cifsInode = CIFS_I(inode);
1983 * Force revalidate to get parent dir info when needed since cached
1984 * attributes are invalid now.
1986 cifsInode->time = 0;
1988 d_inode(direntry)->i_ctime = inode->i_ctime = inode->i_mtime =
1989 current_time(inode);
1998 cifs_do_rename(const unsigned int xid, struct dentry *from_dentry,
1999 const char *from_path, struct dentry *to_dentry,
2000 const char *to_path)
2002 struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb);
2003 struct tcon_link *tlink;
2004 struct cifs_tcon *tcon;
2005 struct TCP_Server_Info *server;
2006 struct cifs_fid fid;
2007 struct cifs_open_parms oparms;
2010 tlink = cifs_sb_tlink(cifs_sb);
2012 return PTR_ERR(tlink);
2013 tcon = tlink_tcon(tlink);
2014 server = tcon->ses->server;
2016 if (!server->ops->rename)
2019 /* try path-based rename first */
2020 rc = server->ops->rename(xid, tcon, from_path, to_path, cifs_sb);
2023 * Don't bother with rename by filehandle unless file is busy and
2024 * source. Note that cross directory moves do not work with
2025 * rename by filehandle to various Windows servers.
2027 if (rc == 0 || rc != -EBUSY)
2028 goto do_rename_exit;
2030 /* Don't fall back to using SMB on SMB 2+ mount */
2031 if (server->vals->protocol_id != 0)
2032 goto do_rename_exit;
2034 /* open-file renames don't work across directories */
2035 if (to_dentry->d_parent != from_dentry->d_parent)
2036 goto do_rename_exit;
2039 oparms.cifs_sb = cifs_sb;
2040 /* open the file to be renamed -- we need DELETE perms */
2041 oparms.desired_access = DELETE;
2042 oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR);
2043 oparms.disposition = FILE_OPEN;
2044 oparms.path = from_path;
2046 oparms.reconnect = false;
2048 rc = CIFS_open(xid, &oparms, &oplock, NULL);
2050 rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid,
2051 (const char *) to_dentry->d_name.name,
2052 cifs_sb->local_nls, cifs_remap(cifs_sb));
2053 CIFSSMBClose(xid, tcon, fid.netfid);
2057 d_move(from_dentry, to_dentry);
2058 cifs_put_tlink(tlink);
2063 cifs_rename2(struct inode *source_dir, struct dentry *source_dentry,
2064 struct inode *target_dir, struct dentry *target_dentry,
2067 char *from_name = NULL;
2068 char *to_name = NULL;
2069 struct cifs_sb_info *cifs_sb;
2070 struct tcon_link *tlink;
2071 struct cifs_tcon *tcon;
2072 FILE_UNIX_BASIC_INFO *info_buf_source = NULL;
2073 FILE_UNIX_BASIC_INFO *info_buf_target;
2077 if (flags & ~RENAME_NOREPLACE)
2080 cifs_sb = CIFS_SB(source_dir->i_sb);
2081 tlink = cifs_sb_tlink(cifs_sb);
2083 return PTR_ERR(tlink);
2084 tcon = tlink_tcon(tlink);
2089 * we already have the rename sem so we do not need to
2090 * grab it again here to protect the path integrity
2092 from_name = build_path_from_dentry(source_dentry);
2093 if (from_name == NULL) {
2095 goto cifs_rename_exit;
2098 to_name = build_path_from_dentry(target_dentry);
2099 if (to_name == NULL) {
2101 goto cifs_rename_exit;
2104 rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry,
2108 * No-replace is the natural behavior for CIFS, so skip unlink hacks.
2110 if (flags & RENAME_NOREPLACE)
2111 goto cifs_rename_exit;
2113 if (rc == -EEXIST && tcon->unix_ext) {
2115 * Are src and dst hardlinks of same inode? We can only tell
2116 * with unix extensions enabled.
2119 kmalloc_array(2, sizeof(FILE_UNIX_BASIC_INFO),
2121 if (info_buf_source == NULL) {
2123 goto cifs_rename_exit;
2126 info_buf_target = info_buf_source + 1;
2127 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, from_name,
2130 cifs_remap(cifs_sb));
2134 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, to_name,
2137 cifs_remap(cifs_sb));
2139 if (tmprc == 0 && (info_buf_source->UniqueId ==
2140 info_buf_target->UniqueId)) {
2141 /* same file, POSIX says that this is a noop */
2143 goto cifs_rename_exit;
2147 * else ... BB we could add the same check for Windows by
2148 * checking the UniqueId via FILE_INTERNAL_INFO
2152 /* Try unlinking the target dentry if it's not negative */
2153 if (d_really_is_positive(target_dentry) && (rc == -EACCES || rc == -EEXIST)) {
2154 if (d_is_dir(target_dentry))
2155 tmprc = cifs_rmdir(target_dir, target_dentry);
2157 tmprc = cifs_unlink(target_dir, target_dentry);
2159 goto cifs_rename_exit;
2160 rc = cifs_do_rename(xid, source_dentry, from_name,
2161 target_dentry, to_name);
2164 /* force revalidate to go get info when needed */
2165 CIFS_I(source_dir)->time = CIFS_I(target_dir)->time = 0;
2167 source_dir->i_ctime = source_dir->i_mtime = target_dir->i_ctime =
2168 target_dir->i_mtime = current_time(source_dir);
2171 kfree(info_buf_source);
2175 cifs_put_tlink(tlink);
2180 cifs_inode_needs_reval(struct inode *inode)
2182 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2183 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2185 if (cifs_i->time == 0)
2188 if (CIFS_CACHE_READ(cifs_i))
2191 if (!lookupCacheEnabled)
2194 if (!cifs_sb->actimeo)
2197 if (!time_in_range(jiffies, cifs_i->time,
2198 cifs_i->time + cifs_sb->actimeo))
2201 /* hardlinked files w/ noserverino get "special" treatment */
2202 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) &&
2203 S_ISREG(inode->i_mode) && inode->i_nlink != 1)
2210 * Zap the cache. Called when invalid_mapping flag is set.
2213 cifs_invalidate_mapping(struct inode *inode)
2217 if (inode->i_mapping && inode->i_mapping->nrpages != 0) {
2218 rc = invalidate_inode_pages2(inode->i_mapping);
2220 cifs_dbg(VFS, "%s: Could not invalidate inode %p\n",
2224 cifs_fscache_reset_inode_cookie(inode);
2229 * cifs_wait_bit_killable - helper for functions that are sleeping on bit locks
2230 * @word: long word containing the bit lock
2233 cifs_wait_bit_killable(struct wait_bit_key *key, int mode)
2235 freezable_schedule_unsafe();
2236 if (signal_pending_state(mode, current))
2237 return -ERESTARTSYS;
2242 cifs_revalidate_mapping(struct inode *inode)
2245 unsigned long *flags = &CIFS_I(inode)->flags;
2247 /* swapfiles are not supposed to be shared */
2248 if (IS_SWAPFILE(inode))
2251 rc = wait_on_bit_lock_action(flags, CIFS_INO_LOCK, cifs_wait_bit_killable,
2256 if (test_and_clear_bit(CIFS_INO_INVALID_MAPPING, flags)) {
2257 rc = cifs_invalidate_mapping(inode);
2259 set_bit(CIFS_INO_INVALID_MAPPING, flags);
2262 clear_bit_unlock(CIFS_INO_LOCK, flags);
2263 smp_mb__after_atomic();
2264 wake_up_bit(flags, CIFS_INO_LOCK);
2270 cifs_zap_mapping(struct inode *inode)
2272 set_bit(CIFS_INO_INVALID_MAPPING, &CIFS_I(inode)->flags);
2273 return cifs_revalidate_mapping(inode);
2276 int cifs_revalidate_file_attr(struct file *filp)
2279 struct inode *inode = file_inode(filp);
2280 struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data;
2282 if (!cifs_inode_needs_reval(inode))
2285 if (tlink_tcon(cfile->tlink)->unix_ext)
2286 rc = cifs_get_file_info_unix(filp);
2288 rc = cifs_get_file_info(filp);
2293 int cifs_revalidate_dentry_attr(struct dentry *dentry)
2297 struct inode *inode = d_inode(dentry);
2298 struct super_block *sb = dentry->d_sb;
2299 char *full_path = NULL;
2305 if (!cifs_inode_needs_reval(inode))
2310 /* can not safely grab the rename sem here if rename calls revalidate
2311 since that would deadlock */
2312 full_path = build_path_from_dentry(dentry);
2313 if (full_path == NULL) {
2318 cifs_dbg(FYI, "Update attributes: %s inode 0x%p count %d dentry: 0x%p d_time %ld jiffies %ld\n",
2319 full_path, inode, inode->i_count.counter,
2320 dentry, cifs_get_time(dentry), jiffies);
2323 if (cifs_sb_master_tcon(CIFS_SB(sb))->posix_extensions)
2324 rc = smb311_posix_get_inode_info(&inode, full_path, sb, xid);
2325 else if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext)
2326 rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid);
2328 rc = cifs_get_inode_info(&inode, full_path, NULL, sb,
2330 if (rc == -EAGAIN && count++ < 10)
2339 int cifs_revalidate_file(struct file *filp)
2342 struct inode *inode = file_inode(filp);
2344 rc = cifs_revalidate_file_attr(filp);
2348 return cifs_revalidate_mapping(inode);
2351 /* revalidate a dentry's inode attributes */
2352 int cifs_revalidate_dentry(struct dentry *dentry)
2355 struct inode *inode = d_inode(dentry);
2357 rc = cifs_revalidate_dentry_attr(dentry);
2361 return cifs_revalidate_mapping(inode);
2364 int cifs_getattr(const struct path *path, struct kstat *stat,
2365 u32 request_mask, unsigned int flags)
2367 struct dentry *dentry = path->dentry;
2368 struct cifs_sb_info *cifs_sb = CIFS_SB(dentry->d_sb);
2369 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
2370 struct inode *inode = d_inode(dentry);
2374 * We need to be sure that all dirty pages are written and the server
2375 * has actual ctime, mtime and file length.
2377 if ((request_mask & (STATX_CTIME | STATX_MTIME | STATX_SIZE | STATX_BLOCKS)) &&
2378 !CIFS_CACHE_READ(CIFS_I(inode)) &&
2379 inode->i_mapping && inode->i_mapping->nrpages != 0) {
2380 rc = filemap_fdatawait(inode->i_mapping);
2382 mapping_set_error(inode->i_mapping, rc);
2387 if ((flags & AT_STATX_SYNC_TYPE) == AT_STATX_FORCE_SYNC)
2388 CIFS_I(inode)->time = 0; /* force revalidate */
2391 * If the caller doesn't require syncing, only sync if
2392 * necessary (e.g. due to earlier truncate or setattr
2393 * invalidating the cached metadata)
2395 if (((flags & AT_STATX_SYNC_TYPE) != AT_STATX_DONT_SYNC) ||
2396 (CIFS_I(inode)->time == 0)) {
2397 rc = cifs_revalidate_dentry_attr(dentry);
2402 generic_fillattr(inode, stat);
2403 stat->blksize = cifs_sb->bsize;
2404 stat->ino = CIFS_I(inode)->uniqueid;
2406 /* old CIFS Unix Extensions doesn't return create time */
2407 if (CIFS_I(inode)->createtime) {
2408 stat->result_mask |= STATX_BTIME;
2410 cifs_NTtimeToUnix(cpu_to_le64(CIFS_I(inode)->createtime));
2413 stat->attributes_mask |= (STATX_ATTR_COMPRESSED | STATX_ATTR_ENCRYPTED);
2414 if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_COMPRESSED)
2415 stat->attributes |= STATX_ATTR_COMPRESSED;
2416 if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_ENCRYPTED)
2417 stat->attributes |= STATX_ATTR_ENCRYPTED;
2420 * If on a multiuser mount without unix extensions or cifsacl being
2421 * enabled, and the admin hasn't overridden them, set the ownership
2422 * to the fsuid/fsgid of the current process.
2424 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) &&
2425 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
2427 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID))
2428 stat->uid = current_fsuid();
2429 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID))
2430 stat->gid = current_fsgid();
2435 int cifs_fiemap(struct inode *inode, struct fiemap_extent_info *fei, u64 start,
2438 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2439 struct cifs_sb_info *cifs_sb = CIFS_SB(cifs_i->vfs_inode.i_sb);
2440 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
2441 struct TCP_Server_Info *server = tcon->ses->server;
2442 struct cifsFileInfo *cfile;
2446 * We need to be sure that all dirty pages are written as they
2447 * might fill holes on the server.
2449 if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
2450 inode->i_mapping->nrpages != 0) {
2451 rc = filemap_fdatawait(inode->i_mapping);
2453 mapping_set_error(inode->i_mapping, rc);
2458 cfile = find_readable_file(cifs_i, false);
2462 if (server->ops->fiemap) {
2463 rc = server->ops->fiemap(tcon, cfile, fei, start, len);
2464 cifsFileInfo_put(cfile);
2468 cifsFileInfo_put(cfile);
2472 int cifs_truncate_page(struct address_space *mapping, loff_t from)
2474 pgoff_t index = from >> PAGE_SHIFT;
2475 unsigned offset = from & (PAGE_SIZE - 1);
2479 page = grab_cache_page(mapping, index);
2483 zero_user_segment(page, offset, PAGE_SIZE);
2489 void cifs_setsize(struct inode *inode, loff_t offset)
2491 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2493 spin_lock(&inode->i_lock);
2494 i_size_write(inode, offset);
2495 spin_unlock(&inode->i_lock);
2497 /* Cached inode must be refreshed on truncate */
2499 truncate_pagecache(inode, offset);
2503 cifs_set_file_size(struct inode *inode, struct iattr *attrs,
2504 unsigned int xid, char *full_path)
2507 struct cifsFileInfo *open_file;
2508 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2509 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2510 struct tcon_link *tlink = NULL;
2511 struct cifs_tcon *tcon = NULL;
2512 struct TCP_Server_Info *server;
2515 * To avoid spurious oplock breaks from server, in the case of
2516 * inodes that we already have open, avoid doing path based
2517 * setting of file size if we can do it by handle.
2518 * This keeps our caching token (oplock) and avoids timeouts
2519 * when the local oplock break takes longer to flush
2520 * writebehind data than the SMB timeout for the SetPathInfo
2521 * request would allow
2523 open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY);
2525 tcon = tlink_tcon(open_file->tlink);
2526 server = tcon->ses->server;
2527 if (server->ops->set_file_size)
2528 rc = server->ops->set_file_size(xid, tcon, open_file,
2529 attrs->ia_size, false);
2532 cifsFileInfo_put(open_file);
2533 cifs_dbg(FYI, "SetFSize for attrs rc = %d\n", rc);
2541 tlink = cifs_sb_tlink(cifs_sb);
2543 return PTR_ERR(tlink);
2544 tcon = tlink_tcon(tlink);
2545 server = tcon->ses->server;
2549 * Set file size by pathname rather than by handle either because no
2550 * valid, writeable file handle for it was found or because there was
2551 * an error setting it by handle.
2553 if (server->ops->set_path_size)
2554 rc = server->ops->set_path_size(xid, tcon, full_path,
2555 attrs->ia_size, cifs_sb, false);
2558 cifs_dbg(FYI, "SetEOF by path (setattrs) rc = %d\n", rc);
2561 cifs_put_tlink(tlink);
2565 cifsInode->server_eof = attrs->ia_size;
2566 cifs_setsize(inode, attrs->ia_size);
2568 * i_blocks is not related to (i_size / i_blksize), but instead
2569 * 512 byte (2**9) size is required for calculating num blocks.
2570 * Until we can query the server for actual allocation size,
2571 * this is best estimate we have for blocks allocated for a file
2572 * Number of blocks must be rounded up so size 1 is not 0 blocks
2574 inode->i_blocks = (512 - 1 + attrs->ia_size) >> 9;
2577 * The man page of truncate says if the size changed,
2578 * then the st_ctime and st_mtime fields for the file
2581 attrs->ia_ctime = attrs->ia_mtime = current_time(inode);
2582 attrs->ia_valid |= ATTR_CTIME | ATTR_MTIME;
2584 cifs_truncate_page(inode->i_mapping, inode->i_size);
2591 cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
2595 char *full_path = NULL;
2596 struct inode *inode = d_inode(direntry);
2597 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2598 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2599 struct tcon_link *tlink;
2600 struct cifs_tcon *pTcon;
2601 struct cifs_unix_set_info_args *args = NULL;
2602 struct cifsFileInfo *open_file;
2604 cifs_dbg(FYI, "setattr_unix on file %pd attrs->ia_valid=0x%x\n",
2605 direntry, attrs->ia_valid);
2609 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
2610 attrs->ia_valid |= ATTR_FORCE;
2612 rc = setattr_prepare(direntry, attrs);
2616 full_path = build_path_from_dentry(direntry);
2617 if (full_path == NULL) {
2623 * Attempt to flush data before changing attributes. We need to do
2624 * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the
2625 * ownership or mode then we may also need to do this. Here, we take
2626 * the safe way out and just do the flush on all setattr requests. If
2627 * the flush returns error, store it to report later and continue.
2629 * BB: This should be smarter. Why bother flushing pages that
2630 * will be truncated anyway? Also, should we error out here if
2631 * the flush returns error?
2633 rc = filemap_write_and_wait(inode->i_mapping);
2634 if (is_interrupt_error(rc)) {
2639 mapping_set_error(inode->i_mapping, rc);
2642 if (attrs->ia_valid & ATTR_SIZE) {
2643 rc = cifs_set_file_size(inode, attrs, xid, full_path);
2648 /* skip mode change if it's just for clearing setuid/setgid */
2649 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
2650 attrs->ia_valid &= ~ATTR_MODE;
2652 args = kmalloc(sizeof(*args), GFP_KERNEL);
2658 /* set up the struct */
2659 if (attrs->ia_valid & ATTR_MODE)
2660 args->mode = attrs->ia_mode;
2662 args->mode = NO_CHANGE_64;
2664 if (attrs->ia_valid & ATTR_UID)
2665 args->uid = attrs->ia_uid;
2667 args->uid = INVALID_UID; /* no change */
2669 if (attrs->ia_valid & ATTR_GID)
2670 args->gid = attrs->ia_gid;
2672 args->gid = INVALID_GID; /* no change */
2674 if (attrs->ia_valid & ATTR_ATIME)
2675 args->atime = cifs_UnixTimeToNT(attrs->ia_atime);
2677 args->atime = NO_CHANGE_64;
2679 if (attrs->ia_valid & ATTR_MTIME)
2680 args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime);
2682 args->mtime = NO_CHANGE_64;
2684 if (attrs->ia_valid & ATTR_CTIME)
2685 args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime);
2687 args->ctime = NO_CHANGE_64;
2690 open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY);
2692 u16 nfid = open_file->fid.netfid;
2693 u32 npid = open_file->pid;
2694 pTcon = tlink_tcon(open_file->tlink);
2695 rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid);
2696 cifsFileInfo_put(open_file);
2698 tlink = cifs_sb_tlink(cifs_sb);
2699 if (IS_ERR(tlink)) {
2700 rc = PTR_ERR(tlink);
2703 pTcon = tlink_tcon(tlink);
2704 rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args,
2706 cifs_remap(cifs_sb));
2707 cifs_put_tlink(tlink);
2713 if ((attrs->ia_valid & ATTR_SIZE) &&
2714 attrs->ia_size != i_size_read(inode))
2715 truncate_setsize(inode, attrs->ia_size);
2717 setattr_copy(inode, attrs);
2718 mark_inode_dirty(inode);
2720 /* force revalidate when any of these times are set since some
2721 of the fs types (eg ext3, fat) do not have fine enough
2722 time granularity to match protocol, and we do not have a
2723 a way (yet) to query the server fs's time granularity (and
2724 whether it rounds times down).
2726 if (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME))
2727 cifsInode->time = 0;
2736 cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
2739 kuid_t uid = INVALID_UID;
2740 kgid_t gid = INVALID_GID;
2741 struct inode *inode = d_inode(direntry);
2742 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2743 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2744 struct cifsFileInfo *wfile;
2745 struct cifs_tcon *tcon;
2746 char *full_path = NULL;
2749 __u64 mode = NO_CHANGE_64;
2753 cifs_dbg(FYI, "setattr on file %pd attrs->ia_valid 0x%x\n",
2754 direntry, attrs->ia_valid);
2756 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
2757 attrs->ia_valid |= ATTR_FORCE;
2759 rc = setattr_prepare(direntry, attrs);
2765 full_path = build_path_from_dentry(direntry);
2766 if (full_path == NULL) {
2773 * Attempt to flush data before changing attributes. We need to do
2774 * this for ATTR_SIZE and ATTR_MTIME. If the flush of the data
2775 * returns error, store it to report later and continue.
2777 * BB: This should be smarter. Why bother flushing pages that
2778 * will be truncated anyway? Also, should we error out here if
2779 * the flush returns error? Do we need to check for ATTR_MTIME_SET flag?
2781 if (attrs->ia_valid & (ATTR_MTIME | ATTR_SIZE | ATTR_CTIME)) {
2782 rc = filemap_write_and_wait(inode->i_mapping);
2783 if (is_interrupt_error(rc)) {
2785 goto cifs_setattr_exit;
2787 mapping_set_error(inode->i_mapping, rc);
2792 if ((attrs->ia_valid & ATTR_MTIME) &&
2793 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) {
2794 rc = cifs_get_writable_file(cifsInode, FIND_WR_ANY, &wfile);
2796 tcon = tlink_tcon(wfile->tlink);
2797 rc = tcon->ses->server->ops->flush(xid, tcon, &wfile->fid);
2798 cifsFileInfo_put(wfile);
2800 goto cifs_setattr_exit;
2801 } else if (rc != -EBADF)
2802 goto cifs_setattr_exit;
2807 if (attrs->ia_valid & ATTR_SIZE) {
2808 rc = cifs_set_file_size(inode, attrs, xid, full_path);
2810 goto cifs_setattr_exit;
2813 if (attrs->ia_valid & ATTR_UID)
2814 uid = attrs->ia_uid;
2816 if (attrs->ia_valid & ATTR_GID)
2817 gid = attrs->ia_gid;
2819 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) ||
2820 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) {
2821 if (uid_valid(uid) || gid_valid(gid)) {
2822 rc = id_mode_to_cifs_acl(inode, full_path, NO_CHANGE_64,
2825 cifs_dbg(FYI, "%s: Setting id failed with error: %d\n",
2827 goto cifs_setattr_exit;
2831 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID))
2832 attrs->ia_valid &= ~(ATTR_UID | ATTR_GID);
2834 /* skip mode change if it's just for clearing setuid/setgid */
2835 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
2836 attrs->ia_valid &= ~ATTR_MODE;
2838 if (attrs->ia_valid & ATTR_MODE) {
2839 mode = attrs->ia_mode;
2841 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) ||
2842 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) {
2843 rc = id_mode_to_cifs_acl(inode, full_path, mode,
2844 INVALID_UID, INVALID_GID);
2846 cifs_dbg(FYI, "%s: Setting ACL failed with error: %d\n",
2848 goto cifs_setattr_exit;
2851 if (((mode & S_IWUGO) == 0) &&
2852 (cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
2854 dosattr = cifsInode->cifsAttrs | ATTR_READONLY;
2856 /* fix up mode if we're not using dynperm */
2857 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
2858 attrs->ia_mode = inode->i_mode & ~S_IWUGO;
2859 } else if ((mode & S_IWUGO) &&
2860 (cifsInode->cifsAttrs & ATTR_READONLY)) {
2862 dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
2863 /* Attributes of 0 are ignored */
2865 dosattr |= ATTR_NORMAL;
2867 /* reset local inode permissions to normal */
2868 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2869 attrs->ia_mode &= ~(S_IALLUGO);
2870 if (S_ISDIR(inode->i_mode))
2872 cifs_sb->mnt_dir_mode;
2875 cifs_sb->mnt_file_mode;
2877 } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2878 /* ignore mode change - ATTR_READONLY hasn't changed */
2879 attrs->ia_valid &= ~ATTR_MODE;
2883 if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) ||
2884 ((attrs->ia_valid & ATTR_MODE) && dosattr)) {
2885 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
2886 /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */
2888 /* Even if error on time set, no sense failing the call if
2889 the server would set the time to a reasonable value anyway,
2890 and this check ensures that we are not being called from
2891 sys_utimes in which case we ought to fail the call back to
2892 the user when the server rejects the call */
2893 if ((rc) && (attrs->ia_valid &
2894 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
2898 /* do not need local check to inode_check_ok since the server does
2901 goto cifs_setattr_exit;
2903 if ((attrs->ia_valid & ATTR_SIZE) &&
2904 attrs->ia_size != i_size_read(inode))
2905 truncate_setsize(inode, attrs->ia_size);
2907 setattr_copy(inode, attrs);
2908 mark_inode_dirty(inode);
2917 cifs_setattr(struct dentry *direntry, struct iattr *attrs)
2919 struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
2920 struct cifs_tcon *pTcon = cifs_sb_master_tcon(cifs_sb);
2921 int rc, retries = 0;
2924 if (pTcon->unix_ext)
2925 rc = cifs_setattr_unix(direntry, attrs);
2927 rc = cifs_setattr_nounix(direntry, attrs);
2929 } while (is_retryable_error(rc) && retries < 2);
2931 /* BB: add cifs_setattr_legacy for really old servers */
2936 void cifs_delete_inode(struct inode *inode)
2938 cifs_dbg(FYI, "In cifs_delete_inode, inode = 0x%p\n", inode);
2939 /* may have to add back in if and when safe distributed caching of
2940 directories added e.g. via FindNotify */