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 rc = cifs_get_inode_info(&inode, path, NULL, sb, xid, NULL);
1340 inode = ERR_PTR(rc);
1344 #ifdef CONFIG_CIFS_FSCACHE
1345 /* populate tcon->resource_id */
1346 tcon->resource_id = CIFS_I(inode)->uniqueid;
1349 if (rc && tcon->pipe) {
1350 cifs_dbg(FYI, "ipc connection - fake read inode\n");
1351 spin_lock(&inode->i_lock);
1352 inode->i_mode |= S_IFDIR;
1353 set_nlink(inode, 2);
1354 inode->i_op = &cifs_ipc_inode_ops;
1355 inode->i_fop = &simple_dir_operations;
1356 inode->i_uid = cifs_sb->mnt_uid;
1357 inode->i_gid = cifs_sb->mnt_gid;
1358 spin_unlock(&inode->i_lock);
1361 inode = ERR_PTR(rc);
1371 cifs_set_file_info(struct inode *inode, struct iattr *attrs, unsigned int xid,
1372 char *full_path, __u32 dosattr)
1374 bool set_time = false;
1375 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1376 struct TCP_Server_Info *server;
1377 FILE_BASIC_INFO info_buf;
1382 server = cifs_sb_master_tcon(cifs_sb)->ses->server;
1383 if (!server->ops->set_file_info)
1388 if (attrs->ia_valid & ATTR_ATIME) {
1390 info_buf.LastAccessTime =
1391 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1393 info_buf.LastAccessTime = 0;
1395 if (attrs->ia_valid & ATTR_MTIME) {
1397 info_buf.LastWriteTime =
1398 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1400 info_buf.LastWriteTime = 0;
1403 * Samba throws this field away, but windows may actually use it.
1404 * Do not set ctime unless other time stamps are changed explicitly
1405 * (i.e. by utimes()) since we would then have a mix of client and
1408 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1409 cifs_dbg(FYI, "CIFS - CTIME changed\n");
1410 info_buf.ChangeTime =
1411 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1413 info_buf.ChangeTime = 0;
1415 info_buf.CreationTime = 0; /* don't change */
1416 info_buf.Attributes = cpu_to_le32(dosattr);
1418 return server->ops->set_file_info(inode, full_path, &info_buf, xid);
1422 * Open the given file (if it isn't already), set the DELETE_ON_CLOSE bit
1423 * and rename it to a random name that hopefully won't conflict with
1427 cifs_rename_pending_delete(const char *full_path, struct dentry *dentry,
1428 const unsigned int xid)
1432 struct cifs_fid fid;
1433 struct cifs_open_parms oparms;
1434 struct inode *inode = d_inode(dentry);
1435 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1436 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1437 struct tcon_link *tlink;
1438 struct cifs_tcon *tcon;
1439 __u32 dosattr, origattr;
1440 FILE_BASIC_INFO *info_buf = NULL;
1442 tlink = cifs_sb_tlink(cifs_sb);
1444 return PTR_ERR(tlink);
1445 tcon = tlink_tcon(tlink);
1448 * We cannot rename the file if the server doesn't support
1449 * CAP_INFOLEVEL_PASSTHRU
1451 if (!(tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)) {
1457 oparms.cifs_sb = cifs_sb;
1458 oparms.desired_access = DELETE | FILE_WRITE_ATTRIBUTES;
1459 oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR);
1460 oparms.disposition = FILE_OPEN;
1461 oparms.path = full_path;
1463 oparms.reconnect = false;
1465 rc = CIFS_open(xid, &oparms, &oplock, NULL);
1469 origattr = cifsInode->cifsAttrs;
1471 origattr |= ATTR_NORMAL;
1473 dosattr = origattr & ~ATTR_READONLY;
1475 dosattr |= ATTR_NORMAL;
1476 dosattr |= ATTR_HIDDEN;
1478 /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */
1479 if (dosattr != origattr) {
1480 info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL);
1481 if (info_buf == NULL) {
1485 info_buf->Attributes = cpu_to_le32(dosattr);
1486 rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid,
1488 /* although we would like to mark the file hidden
1489 if that fails we will still try to rename it */
1491 cifsInode->cifsAttrs = dosattr;
1493 dosattr = origattr; /* since not able to change them */
1496 /* rename the file */
1497 rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, NULL,
1499 cifs_remap(cifs_sb));
1505 /* try to set DELETE_ON_CLOSE */
1506 if (!test_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags)) {
1507 rc = CIFSSMBSetFileDisposition(xid, tcon, true, fid.netfid,
1510 * some samba versions return -ENOENT when we try to set the
1511 * file disposition here. Likely a samba bug, but work around
1512 * it for now. This means that some cifsXXX files may hang
1513 * around after they shouldn't.
1515 * BB: remove this hack after more servers have the fix
1523 set_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags);
1527 CIFSSMBClose(xid, tcon, fid.netfid);
1530 cifs_put_tlink(tlink);
1534 * reset everything back to the original state. Don't bother
1535 * dealing with errors here since we can't do anything about
1539 CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, dentry->d_name.name,
1540 cifs_sb->local_nls, cifs_remap(cifs_sb));
1542 if (dosattr != origattr) {
1543 info_buf->Attributes = cpu_to_le32(origattr);
1544 if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid,
1546 cifsInode->cifsAttrs = origattr;
1552 /* copied from fs/nfs/dir.c with small changes */
1554 cifs_drop_nlink(struct inode *inode)
1556 spin_lock(&inode->i_lock);
1557 if (inode->i_nlink > 0)
1559 spin_unlock(&inode->i_lock);
1563 * If d_inode(dentry) is null (usually meaning the cached dentry
1564 * is a negative dentry) then we would attempt a standard SMB delete, but
1565 * if that fails we can not attempt the fall back mechanisms on EACCES
1566 * but will return the EACCES to the caller. Note that the VFS does not call
1567 * unlink on negative dentries currently.
1569 int cifs_unlink(struct inode *dir, struct dentry *dentry)
1573 char *full_path = NULL;
1574 struct inode *inode = d_inode(dentry);
1575 struct cifsInodeInfo *cifs_inode;
1576 struct super_block *sb = dir->i_sb;
1577 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1578 struct tcon_link *tlink;
1579 struct cifs_tcon *tcon;
1580 struct TCP_Server_Info *server;
1581 struct iattr *attrs = NULL;
1582 __u32 dosattr = 0, origattr = 0;
1584 cifs_dbg(FYI, "cifs_unlink, dir=0x%p, dentry=0x%p\n", dir, dentry);
1586 tlink = cifs_sb_tlink(cifs_sb);
1588 return PTR_ERR(tlink);
1589 tcon = tlink_tcon(tlink);
1590 server = tcon->ses->server;
1594 if (tcon->nodelete) {
1599 /* Unlink can be called from rename so we can not take the
1600 * sb->s_vfs_rename_mutex here */
1601 full_path = build_path_from_dentry(dentry);
1602 if (full_path == NULL) {
1607 if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1608 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1609 rc = CIFSPOSIXDelFile(xid, tcon, full_path,
1610 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
1611 cifs_remap(cifs_sb));
1612 cifs_dbg(FYI, "posix del rc %d\n", rc);
1613 if ((rc == 0) || (rc == -ENOENT))
1614 goto psx_del_no_retry;
1618 if (!server->ops->unlink) {
1620 goto psx_del_no_retry;
1623 rc = server->ops->unlink(xid, tcon, full_path, cifs_sb);
1628 cifs_drop_nlink(inode);
1629 } else if (rc == -ENOENT) {
1631 } else if (rc == -EBUSY) {
1632 if (server->ops->rename_pending_delete) {
1633 rc = server->ops->rename_pending_delete(full_path,
1636 cifs_drop_nlink(inode);
1638 } else if ((rc == -EACCES) && (dosattr == 0) && inode) {
1639 attrs = kzalloc(sizeof(*attrs), GFP_KERNEL);
1640 if (attrs == NULL) {
1645 /* try to reset dos attributes */
1646 cifs_inode = CIFS_I(inode);
1647 origattr = cifs_inode->cifsAttrs;
1649 origattr |= ATTR_NORMAL;
1650 dosattr = origattr & ~ATTR_READONLY;
1652 dosattr |= ATTR_NORMAL;
1653 dosattr |= ATTR_HIDDEN;
1655 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
1659 goto retry_std_delete;
1662 /* undo the setattr if we errored out and it's needed */
1663 if (rc != 0 && dosattr != 0)
1664 cifs_set_file_info(inode, attrs, xid, full_path, origattr);
1668 cifs_inode = CIFS_I(inode);
1669 cifs_inode->time = 0; /* will force revalidate to get info
1671 inode->i_ctime = current_time(inode);
1673 dir->i_ctime = dir->i_mtime = current_time(dir);
1674 cifs_inode = CIFS_I(dir);
1675 CIFS_I(dir)->time = 0; /* force revalidate of dir as well */
1680 cifs_put_tlink(tlink);
1685 cifs_mkdir_qinfo(struct inode *parent, struct dentry *dentry, umode_t mode,
1686 const char *full_path, struct cifs_sb_info *cifs_sb,
1687 struct cifs_tcon *tcon, const unsigned int xid)
1690 struct inode *inode = NULL;
1693 rc = cifs_get_inode_info_unix(&inode, full_path, parent->i_sb,
1696 rc = cifs_get_inode_info(&inode, full_path, NULL, parent->i_sb,
1703 * setting nlink not necessary except in cases where we failed to get it
1704 * from the server or was set bogus. Also, since this is a brand new
1705 * inode, no need to grab the i_lock before setting the i_nlink.
1707 if (inode->i_nlink < 2)
1708 set_nlink(inode, 2);
1709 mode &= ~current_umask();
1710 /* must turn on setgid bit if parent dir has it */
1711 if (parent->i_mode & S_ISGID)
1714 if (tcon->unix_ext) {
1715 struct cifs_unix_set_info_args args = {
1717 .ctime = NO_CHANGE_64,
1718 .atime = NO_CHANGE_64,
1719 .mtime = NO_CHANGE_64,
1722 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1723 args.uid = current_fsuid();
1724 if (parent->i_mode & S_ISGID)
1725 args.gid = parent->i_gid;
1727 args.gid = current_fsgid();
1729 args.uid = INVALID_UID; /* no change */
1730 args.gid = INVALID_GID; /* no change */
1732 CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args,
1734 cifs_remap(cifs_sb));
1736 struct TCP_Server_Info *server = tcon->ses->server;
1737 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
1738 (mode & S_IWUGO) == 0 && server->ops->mkdir_setinfo)
1739 server->ops->mkdir_setinfo(inode, full_path, cifs_sb,
1741 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
1742 inode->i_mode = (mode | S_IFDIR);
1744 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1745 inode->i_uid = current_fsuid();
1746 if (inode->i_mode & S_ISGID)
1747 inode->i_gid = parent->i_gid;
1749 inode->i_gid = current_fsgid();
1752 d_instantiate(dentry, inode);
1757 cifs_posix_mkdir(struct inode *inode, struct dentry *dentry, umode_t mode,
1758 const char *full_path, struct cifs_sb_info *cifs_sb,
1759 struct cifs_tcon *tcon, const unsigned int xid)
1763 FILE_UNIX_BASIC_INFO *info = NULL;
1764 struct inode *newinode = NULL;
1765 struct cifs_fattr fattr;
1767 info = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1770 goto posix_mkdir_out;
1773 mode &= ~current_umask();
1774 rc = CIFSPOSIXCreate(xid, tcon, SMB_O_DIRECTORY | SMB_O_CREAT, mode,
1775 NULL /* netfid */, info, &oplock, full_path,
1776 cifs_sb->local_nls, cifs_remap(cifs_sb));
1777 if (rc == -EOPNOTSUPP)
1778 goto posix_mkdir_out;
1780 cifs_dbg(FYI, "posix mkdir returned 0x%x\n", rc);
1782 goto posix_mkdir_out;
1785 if (info->Type == cpu_to_le32(-1))
1786 /* no return info, go query for it */
1787 goto posix_mkdir_get_info;
1789 * BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if
1790 * need to set uid/gid.
1793 cifs_unix_basic_to_fattr(&fattr, info, cifs_sb);
1794 cifs_fill_uniqueid(inode->i_sb, &fattr);
1795 newinode = cifs_iget(inode->i_sb, &fattr);
1797 goto posix_mkdir_get_info;
1799 d_instantiate(dentry, newinode);
1801 #ifdef CONFIG_CIFS_DEBUG2
1802 cifs_dbg(FYI, "instantiated dentry %p %pd to inode %p\n",
1803 dentry, dentry, newinode);
1805 if (newinode->i_nlink != 2)
1806 cifs_dbg(FYI, "unexpected number of links %d\n",
1813 posix_mkdir_get_info:
1814 rc = cifs_mkdir_qinfo(inode, dentry, mode, full_path, cifs_sb, tcon,
1816 goto posix_mkdir_out;
1819 int cifs_mkdir(struct inode *inode, struct dentry *direntry, umode_t mode)
1823 struct cifs_sb_info *cifs_sb;
1824 struct tcon_link *tlink;
1825 struct cifs_tcon *tcon;
1826 struct TCP_Server_Info *server;
1829 cifs_dbg(FYI, "In cifs_mkdir, mode = %04ho inode = 0x%p\n",
1832 cifs_sb = CIFS_SB(inode->i_sb);
1833 tlink = cifs_sb_tlink(cifs_sb);
1835 return PTR_ERR(tlink);
1836 tcon = tlink_tcon(tlink);
1840 full_path = build_path_from_dentry(direntry);
1841 if (full_path == NULL) {
1846 server = tcon->ses->server;
1848 if ((server->ops->posix_mkdir) && (tcon->posix_extensions)) {
1849 rc = server->ops->posix_mkdir(xid, inode, mode, tcon, full_path,
1851 d_drop(direntry); /* for time being always refresh inode info */
1855 if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1856 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1857 rc = cifs_posix_mkdir(inode, direntry, mode, full_path, cifs_sb,
1859 if (rc != -EOPNOTSUPP)
1863 if (!server->ops->mkdir) {
1868 /* BB add setting the equivalent of mode via CreateX w/ACLs */
1869 rc = server->ops->mkdir(xid, inode, mode, tcon, full_path, cifs_sb);
1871 cifs_dbg(FYI, "cifs_mkdir returned 0x%x\n", rc);
1876 /* TODO: skip this for smb2/smb3 */
1877 rc = cifs_mkdir_qinfo(inode, direntry, mode, full_path, cifs_sb, tcon,
1881 * Force revalidate to get parent dir info when needed since cached
1882 * attributes are invalid now.
1884 CIFS_I(inode)->time = 0;
1887 cifs_put_tlink(tlink);
1891 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1895 struct cifs_sb_info *cifs_sb;
1896 struct tcon_link *tlink;
1897 struct cifs_tcon *tcon;
1898 struct TCP_Server_Info *server;
1899 char *full_path = NULL;
1900 struct cifsInodeInfo *cifsInode;
1902 cifs_dbg(FYI, "cifs_rmdir, inode = 0x%p\n", inode);
1906 full_path = build_path_from_dentry(direntry);
1907 if (full_path == NULL) {
1912 cifs_sb = CIFS_SB(inode->i_sb);
1913 tlink = cifs_sb_tlink(cifs_sb);
1914 if (IS_ERR(tlink)) {
1915 rc = PTR_ERR(tlink);
1918 tcon = tlink_tcon(tlink);
1919 server = tcon->ses->server;
1921 if (!server->ops->rmdir) {
1923 cifs_put_tlink(tlink);
1927 if (tcon->nodelete) {
1929 cifs_put_tlink(tlink);
1933 rc = server->ops->rmdir(xid, tcon, full_path, cifs_sb);
1934 cifs_put_tlink(tlink);
1937 spin_lock(&d_inode(direntry)->i_lock);
1938 i_size_write(d_inode(direntry), 0);
1939 clear_nlink(d_inode(direntry));
1940 spin_unlock(&d_inode(direntry)->i_lock);
1943 cifsInode = CIFS_I(d_inode(direntry));
1944 /* force revalidate to go get info when needed */
1945 cifsInode->time = 0;
1947 cifsInode = CIFS_I(inode);
1949 * Force revalidate to get parent dir info when needed since cached
1950 * attributes are invalid now.
1952 cifsInode->time = 0;
1954 d_inode(direntry)->i_ctime = inode->i_ctime = inode->i_mtime =
1955 current_time(inode);
1964 cifs_do_rename(const unsigned int xid, struct dentry *from_dentry,
1965 const char *from_path, struct dentry *to_dentry,
1966 const char *to_path)
1968 struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb);
1969 struct tcon_link *tlink;
1970 struct cifs_tcon *tcon;
1971 struct TCP_Server_Info *server;
1972 struct cifs_fid fid;
1973 struct cifs_open_parms oparms;
1976 tlink = cifs_sb_tlink(cifs_sb);
1978 return PTR_ERR(tlink);
1979 tcon = tlink_tcon(tlink);
1980 server = tcon->ses->server;
1982 if (!server->ops->rename)
1985 /* try path-based rename first */
1986 rc = server->ops->rename(xid, tcon, from_path, to_path, cifs_sb);
1989 * Don't bother with rename by filehandle unless file is busy and
1990 * source. Note that cross directory moves do not work with
1991 * rename by filehandle to various Windows servers.
1993 if (rc == 0 || rc != -EBUSY)
1994 goto do_rename_exit;
1996 /* Don't fall back to using SMB on SMB 2+ mount */
1997 if (server->vals->protocol_id != 0)
1998 goto do_rename_exit;
2000 /* open-file renames don't work across directories */
2001 if (to_dentry->d_parent != from_dentry->d_parent)
2002 goto do_rename_exit;
2005 oparms.cifs_sb = cifs_sb;
2006 /* open the file to be renamed -- we need DELETE perms */
2007 oparms.desired_access = DELETE;
2008 oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR);
2009 oparms.disposition = FILE_OPEN;
2010 oparms.path = from_path;
2012 oparms.reconnect = false;
2014 rc = CIFS_open(xid, &oparms, &oplock, NULL);
2016 rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid,
2017 (const char *) to_dentry->d_name.name,
2018 cifs_sb->local_nls, cifs_remap(cifs_sb));
2019 CIFSSMBClose(xid, tcon, fid.netfid);
2023 d_move(from_dentry, to_dentry);
2024 cifs_put_tlink(tlink);
2029 cifs_rename2(struct inode *source_dir, struct dentry *source_dentry,
2030 struct inode *target_dir, struct dentry *target_dentry,
2033 char *from_name = NULL;
2034 char *to_name = NULL;
2035 struct cifs_sb_info *cifs_sb;
2036 struct tcon_link *tlink;
2037 struct cifs_tcon *tcon;
2038 FILE_UNIX_BASIC_INFO *info_buf_source = NULL;
2039 FILE_UNIX_BASIC_INFO *info_buf_target;
2043 if (flags & ~RENAME_NOREPLACE)
2046 cifs_sb = CIFS_SB(source_dir->i_sb);
2047 tlink = cifs_sb_tlink(cifs_sb);
2049 return PTR_ERR(tlink);
2050 tcon = tlink_tcon(tlink);
2055 * we already have the rename sem so we do not need to
2056 * grab it again here to protect the path integrity
2058 from_name = build_path_from_dentry(source_dentry);
2059 if (from_name == NULL) {
2061 goto cifs_rename_exit;
2064 to_name = build_path_from_dentry(target_dentry);
2065 if (to_name == NULL) {
2067 goto cifs_rename_exit;
2070 rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry,
2074 * No-replace is the natural behavior for CIFS, so skip unlink hacks.
2076 if (flags & RENAME_NOREPLACE)
2077 goto cifs_rename_exit;
2079 if (rc == -EEXIST && tcon->unix_ext) {
2081 * Are src and dst hardlinks of same inode? We can only tell
2082 * with unix extensions enabled.
2085 kmalloc_array(2, sizeof(FILE_UNIX_BASIC_INFO),
2087 if (info_buf_source == NULL) {
2089 goto cifs_rename_exit;
2092 info_buf_target = info_buf_source + 1;
2093 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, from_name,
2096 cifs_remap(cifs_sb));
2100 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, to_name,
2103 cifs_remap(cifs_sb));
2105 if (tmprc == 0 && (info_buf_source->UniqueId ==
2106 info_buf_target->UniqueId)) {
2107 /* same file, POSIX says that this is a noop */
2109 goto cifs_rename_exit;
2113 * else ... BB we could add the same check for Windows by
2114 * checking the UniqueId via FILE_INTERNAL_INFO
2118 /* Try unlinking the target dentry if it's not negative */
2119 if (d_really_is_positive(target_dentry) && (rc == -EACCES || rc == -EEXIST)) {
2120 if (d_is_dir(target_dentry))
2121 tmprc = cifs_rmdir(target_dir, target_dentry);
2123 tmprc = cifs_unlink(target_dir, target_dentry);
2125 goto cifs_rename_exit;
2126 rc = cifs_do_rename(xid, source_dentry, from_name,
2127 target_dentry, to_name);
2130 /* force revalidate to go get info when needed */
2131 CIFS_I(source_dir)->time = CIFS_I(target_dir)->time = 0;
2133 source_dir->i_ctime = source_dir->i_mtime = target_dir->i_ctime =
2134 target_dir->i_mtime = current_time(source_dir);
2137 kfree(info_buf_source);
2141 cifs_put_tlink(tlink);
2146 cifs_inode_needs_reval(struct inode *inode)
2148 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2149 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2151 if (cifs_i->time == 0)
2154 if (CIFS_CACHE_READ(cifs_i))
2157 if (!lookupCacheEnabled)
2160 if (!cifs_sb->actimeo)
2163 if (!time_in_range(jiffies, cifs_i->time,
2164 cifs_i->time + cifs_sb->actimeo))
2167 /* hardlinked files w/ noserverino get "special" treatment */
2168 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) &&
2169 S_ISREG(inode->i_mode) && inode->i_nlink != 1)
2176 * Zap the cache. Called when invalid_mapping flag is set.
2179 cifs_invalidate_mapping(struct inode *inode)
2183 if (inode->i_mapping && inode->i_mapping->nrpages != 0) {
2184 rc = invalidate_inode_pages2(inode->i_mapping);
2186 cifs_dbg(VFS, "%s: Could not invalidate inode %p\n",
2190 cifs_fscache_reset_inode_cookie(inode);
2195 * cifs_wait_bit_killable - helper for functions that are sleeping on bit locks
2196 * @word: long word containing the bit lock
2199 cifs_wait_bit_killable(struct wait_bit_key *key, int mode)
2201 freezable_schedule_unsafe();
2202 if (signal_pending_state(mode, current))
2203 return -ERESTARTSYS;
2208 cifs_revalidate_mapping(struct inode *inode)
2211 unsigned long *flags = &CIFS_I(inode)->flags;
2213 /* swapfiles are not supposed to be shared */
2214 if (IS_SWAPFILE(inode))
2217 rc = wait_on_bit_lock_action(flags, CIFS_INO_LOCK, cifs_wait_bit_killable,
2222 if (test_and_clear_bit(CIFS_INO_INVALID_MAPPING, flags)) {
2223 rc = cifs_invalidate_mapping(inode);
2225 set_bit(CIFS_INO_INVALID_MAPPING, flags);
2228 clear_bit_unlock(CIFS_INO_LOCK, flags);
2229 smp_mb__after_atomic();
2230 wake_up_bit(flags, CIFS_INO_LOCK);
2236 cifs_zap_mapping(struct inode *inode)
2238 set_bit(CIFS_INO_INVALID_MAPPING, &CIFS_I(inode)->flags);
2239 return cifs_revalidate_mapping(inode);
2242 int cifs_revalidate_file_attr(struct file *filp)
2245 struct inode *inode = file_inode(filp);
2246 struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data;
2248 if (!cifs_inode_needs_reval(inode))
2251 if (tlink_tcon(cfile->tlink)->unix_ext)
2252 rc = cifs_get_file_info_unix(filp);
2254 rc = cifs_get_file_info(filp);
2259 int cifs_revalidate_dentry_attr(struct dentry *dentry)
2263 struct inode *inode = d_inode(dentry);
2264 struct super_block *sb = dentry->d_sb;
2265 char *full_path = NULL;
2271 if (!cifs_inode_needs_reval(inode))
2276 /* can not safely grab the rename sem here if rename calls revalidate
2277 since that would deadlock */
2278 full_path = build_path_from_dentry(dentry);
2279 if (full_path == NULL) {
2284 cifs_dbg(FYI, "Update attributes: %s inode 0x%p count %d dentry: 0x%p d_time %ld jiffies %ld\n",
2285 full_path, inode, inode->i_count.counter,
2286 dentry, cifs_get_time(dentry), jiffies);
2289 if (cifs_sb_master_tcon(CIFS_SB(sb))->posix_extensions)
2290 rc = smb311_posix_get_inode_info(&inode, full_path, sb, xid);
2291 else if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext)
2292 rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid);
2294 rc = cifs_get_inode_info(&inode, full_path, NULL, sb,
2296 if (rc == -EAGAIN && count++ < 10)
2305 int cifs_revalidate_file(struct file *filp)
2308 struct inode *inode = file_inode(filp);
2310 rc = cifs_revalidate_file_attr(filp);
2314 return cifs_revalidate_mapping(inode);
2317 /* revalidate a dentry's inode attributes */
2318 int cifs_revalidate_dentry(struct dentry *dentry)
2321 struct inode *inode = d_inode(dentry);
2323 rc = cifs_revalidate_dentry_attr(dentry);
2327 return cifs_revalidate_mapping(inode);
2330 int cifs_getattr(const struct path *path, struct kstat *stat,
2331 u32 request_mask, unsigned int flags)
2333 struct dentry *dentry = path->dentry;
2334 struct cifs_sb_info *cifs_sb = CIFS_SB(dentry->d_sb);
2335 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
2336 struct inode *inode = d_inode(dentry);
2340 * We need to be sure that all dirty pages are written and the server
2341 * has actual ctime, mtime and file length.
2343 if ((request_mask & (STATX_CTIME | STATX_MTIME | STATX_SIZE)) &&
2344 !CIFS_CACHE_READ(CIFS_I(inode)) &&
2345 inode->i_mapping && inode->i_mapping->nrpages != 0) {
2346 rc = filemap_fdatawait(inode->i_mapping);
2348 mapping_set_error(inode->i_mapping, rc);
2353 if ((flags & AT_STATX_SYNC_TYPE) == AT_STATX_FORCE_SYNC)
2354 CIFS_I(inode)->time = 0; /* force revalidate */
2357 * If the caller doesn't require syncing, only sync if
2358 * necessary (e.g. due to earlier truncate or setattr
2359 * invalidating the cached metadata)
2361 if (((flags & AT_STATX_SYNC_TYPE) != AT_STATX_DONT_SYNC) ||
2362 (CIFS_I(inode)->time == 0)) {
2363 rc = cifs_revalidate_dentry_attr(dentry);
2368 generic_fillattr(inode, stat);
2369 stat->blksize = cifs_sb->bsize;
2370 stat->ino = CIFS_I(inode)->uniqueid;
2372 /* old CIFS Unix Extensions doesn't return create time */
2373 if (CIFS_I(inode)->createtime) {
2374 stat->result_mask |= STATX_BTIME;
2376 cifs_NTtimeToUnix(cpu_to_le64(CIFS_I(inode)->createtime));
2379 stat->attributes_mask |= (STATX_ATTR_COMPRESSED | STATX_ATTR_ENCRYPTED);
2380 if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_COMPRESSED)
2381 stat->attributes |= STATX_ATTR_COMPRESSED;
2382 if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_ENCRYPTED)
2383 stat->attributes |= STATX_ATTR_ENCRYPTED;
2386 * If on a multiuser mount without unix extensions or cifsacl being
2387 * enabled, and the admin hasn't overridden them, set the ownership
2388 * to the fsuid/fsgid of the current process.
2390 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) &&
2391 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
2393 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID))
2394 stat->uid = current_fsuid();
2395 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID))
2396 stat->gid = current_fsgid();
2401 int cifs_fiemap(struct inode *inode, struct fiemap_extent_info *fei, u64 start,
2404 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2405 struct cifs_sb_info *cifs_sb = CIFS_SB(cifs_i->vfs_inode.i_sb);
2406 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
2407 struct TCP_Server_Info *server = tcon->ses->server;
2408 struct cifsFileInfo *cfile;
2412 * We need to be sure that all dirty pages are written as they
2413 * might fill holes on the server.
2415 if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
2416 inode->i_mapping->nrpages != 0) {
2417 rc = filemap_fdatawait(inode->i_mapping);
2419 mapping_set_error(inode->i_mapping, rc);
2424 cfile = find_readable_file(cifs_i, false);
2428 if (server->ops->fiemap) {
2429 rc = server->ops->fiemap(tcon, cfile, fei, start, len);
2430 cifsFileInfo_put(cfile);
2434 cifsFileInfo_put(cfile);
2438 int cifs_truncate_page(struct address_space *mapping, loff_t from)
2440 pgoff_t index = from >> PAGE_SHIFT;
2441 unsigned offset = from & (PAGE_SIZE - 1);
2445 page = grab_cache_page(mapping, index);
2449 zero_user_segment(page, offset, PAGE_SIZE);
2455 void cifs_setsize(struct inode *inode, loff_t offset)
2457 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2459 spin_lock(&inode->i_lock);
2460 i_size_write(inode, offset);
2461 spin_unlock(&inode->i_lock);
2463 /* Cached inode must be refreshed on truncate */
2465 truncate_pagecache(inode, offset);
2469 cifs_set_file_size(struct inode *inode, struct iattr *attrs,
2470 unsigned int xid, char *full_path)
2473 struct cifsFileInfo *open_file;
2474 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2475 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2476 struct tcon_link *tlink = NULL;
2477 struct cifs_tcon *tcon = NULL;
2478 struct TCP_Server_Info *server;
2481 * To avoid spurious oplock breaks from server, in the case of
2482 * inodes that we already have open, avoid doing path based
2483 * setting of file size if we can do it by handle.
2484 * This keeps our caching token (oplock) and avoids timeouts
2485 * when the local oplock break takes longer to flush
2486 * writebehind data than the SMB timeout for the SetPathInfo
2487 * request would allow
2489 open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY);
2491 tcon = tlink_tcon(open_file->tlink);
2492 server = tcon->ses->server;
2493 if (server->ops->set_file_size)
2494 rc = server->ops->set_file_size(xid, tcon, open_file,
2495 attrs->ia_size, false);
2498 cifsFileInfo_put(open_file);
2499 cifs_dbg(FYI, "SetFSize for attrs rc = %d\n", rc);
2507 tlink = cifs_sb_tlink(cifs_sb);
2509 return PTR_ERR(tlink);
2510 tcon = tlink_tcon(tlink);
2511 server = tcon->ses->server;
2515 * Set file size by pathname rather than by handle either because no
2516 * valid, writeable file handle for it was found or because there was
2517 * an error setting it by handle.
2519 if (server->ops->set_path_size)
2520 rc = server->ops->set_path_size(xid, tcon, full_path,
2521 attrs->ia_size, cifs_sb, false);
2524 cifs_dbg(FYI, "SetEOF by path (setattrs) rc = %d\n", rc);
2527 cifs_put_tlink(tlink);
2531 cifsInode->server_eof = attrs->ia_size;
2532 cifs_setsize(inode, attrs->ia_size);
2533 cifs_truncate_page(inode->i_mapping, inode->i_size);
2540 cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
2544 char *full_path = NULL;
2545 struct inode *inode = d_inode(direntry);
2546 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2547 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2548 struct tcon_link *tlink;
2549 struct cifs_tcon *pTcon;
2550 struct cifs_unix_set_info_args *args = NULL;
2551 struct cifsFileInfo *open_file;
2553 cifs_dbg(FYI, "setattr_unix on file %pd attrs->ia_valid=0x%x\n",
2554 direntry, attrs->ia_valid);
2558 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
2559 attrs->ia_valid |= ATTR_FORCE;
2561 rc = setattr_prepare(direntry, attrs);
2565 full_path = build_path_from_dentry(direntry);
2566 if (full_path == NULL) {
2572 * Attempt to flush data before changing attributes. We need to do
2573 * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the
2574 * ownership or mode then we may also need to do this. Here, we take
2575 * the safe way out and just do the flush on all setattr requests. If
2576 * the flush returns error, store it to report later and continue.
2578 * BB: This should be smarter. Why bother flushing pages that
2579 * will be truncated anyway? Also, should we error out here if
2580 * the flush returns error?
2582 rc = filemap_write_and_wait(inode->i_mapping);
2583 if (is_interrupt_error(rc)) {
2588 mapping_set_error(inode->i_mapping, rc);
2591 if (attrs->ia_valid & ATTR_SIZE) {
2592 rc = cifs_set_file_size(inode, attrs, xid, full_path);
2597 /* skip mode change if it's just for clearing setuid/setgid */
2598 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
2599 attrs->ia_valid &= ~ATTR_MODE;
2601 args = kmalloc(sizeof(*args), GFP_KERNEL);
2607 /* set up the struct */
2608 if (attrs->ia_valid & ATTR_MODE)
2609 args->mode = attrs->ia_mode;
2611 args->mode = NO_CHANGE_64;
2613 if (attrs->ia_valid & ATTR_UID)
2614 args->uid = attrs->ia_uid;
2616 args->uid = INVALID_UID; /* no change */
2618 if (attrs->ia_valid & ATTR_GID)
2619 args->gid = attrs->ia_gid;
2621 args->gid = INVALID_GID; /* no change */
2623 if (attrs->ia_valid & ATTR_ATIME)
2624 args->atime = cifs_UnixTimeToNT(attrs->ia_atime);
2626 args->atime = NO_CHANGE_64;
2628 if (attrs->ia_valid & ATTR_MTIME)
2629 args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime);
2631 args->mtime = NO_CHANGE_64;
2633 if (attrs->ia_valid & ATTR_CTIME)
2634 args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime);
2636 args->ctime = NO_CHANGE_64;
2639 open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY);
2641 u16 nfid = open_file->fid.netfid;
2642 u32 npid = open_file->pid;
2643 pTcon = tlink_tcon(open_file->tlink);
2644 rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid);
2645 cifsFileInfo_put(open_file);
2647 tlink = cifs_sb_tlink(cifs_sb);
2648 if (IS_ERR(tlink)) {
2649 rc = PTR_ERR(tlink);
2652 pTcon = tlink_tcon(tlink);
2653 rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args,
2655 cifs_remap(cifs_sb));
2656 cifs_put_tlink(tlink);
2662 if ((attrs->ia_valid & ATTR_SIZE) &&
2663 attrs->ia_size != i_size_read(inode))
2664 truncate_setsize(inode, attrs->ia_size);
2666 setattr_copy(inode, attrs);
2667 mark_inode_dirty(inode);
2669 /* force revalidate when any of these times are set since some
2670 of the fs types (eg ext3, fat) do not have fine enough
2671 time granularity to match protocol, and we do not have a
2672 a way (yet) to query the server fs's time granularity (and
2673 whether it rounds times down).
2675 if (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME))
2676 cifsInode->time = 0;
2685 cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
2688 kuid_t uid = INVALID_UID;
2689 kgid_t gid = INVALID_GID;
2690 struct inode *inode = d_inode(direntry);
2691 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2692 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2693 struct cifsFileInfo *wfile;
2694 struct cifs_tcon *tcon;
2695 char *full_path = NULL;
2698 __u64 mode = NO_CHANGE_64;
2702 cifs_dbg(FYI, "setattr on file %pd attrs->ia_valid 0x%x\n",
2703 direntry, attrs->ia_valid);
2705 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
2706 attrs->ia_valid |= ATTR_FORCE;
2708 rc = setattr_prepare(direntry, attrs);
2714 full_path = build_path_from_dentry(direntry);
2715 if (full_path == NULL) {
2722 * Attempt to flush data before changing attributes. We need to do
2723 * this for ATTR_SIZE and ATTR_MTIME. If the flush of the data
2724 * returns error, store it to report later and continue.
2726 * BB: This should be smarter. Why bother flushing pages that
2727 * will be truncated anyway? Also, should we error out here if
2728 * the flush returns error? Do we need to check for ATTR_MTIME_SET flag?
2730 if (attrs->ia_valid & (ATTR_MTIME | ATTR_SIZE | ATTR_CTIME)) {
2731 rc = filemap_write_and_wait(inode->i_mapping);
2732 if (is_interrupt_error(rc)) {
2734 goto cifs_setattr_exit;
2736 mapping_set_error(inode->i_mapping, rc);
2741 if ((attrs->ia_valid & ATTR_MTIME) &&
2742 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) {
2743 rc = cifs_get_writable_file(cifsInode, FIND_WR_ANY, &wfile);
2745 tcon = tlink_tcon(wfile->tlink);
2746 rc = tcon->ses->server->ops->flush(xid, tcon, &wfile->fid);
2747 cifsFileInfo_put(wfile);
2749 goto cifs_setattr_exit;
2750 } else if (rc != -EBADF)
2751 goto cifs_setattr_exit;
2756 if (attrs->ia_valid & ATTR_SIZE) {
2757 rc = cifs_set_file_size(inode, attrs, xid, full_path);
2759 goto cifs_setattr_exit;
2762 if (attrs->ia_valid & ATTR_UID)
2763 uid = attrs->ia_uid;
2765 if (attrs->ia_valid & ATTR_GID)
2766 gid = attrs->ia_gid;
2768 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) ||
2769 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) {
2770 if (uid_valid(uid) || gid_valid(gid)) {
2771 rc = id_mode_to_cifs_acl(inode, full_path, NO_CHANGE_64,
2774 cifs_dbg(FYI, "%s: Setting id failed with error: %d\n",
2776 goto cifs_setattr_exit;
2780 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID))
2781 attrs->ia_valid &= ~(ATTR_UID | ATTR_GID);
2783 /* skip mode change if it's just for clearing setuid/setgid */
2784 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
2785 attrs->ia_valid &= ~ATTR_MODE;
2787 if (attrs->ia_valid & ATTR_MODE) {
2788 mode = attrs->ia_mode;
2790 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) ||
2791 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) {
2792 rc = id_mode_to_cifs_acl(inode, full_path, mode,
2793 INVALID_UID, INVALID_GID);
2795 cifs_dbg(FYI, "%s: Setting ACL failed with error: %d\n",
2797 goto cifs_setattr_exit;
2800 if (((mode & S_IWUGO) == 0) &&
2801 (cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
2803 dosattr = cifsInode->cifsAttrs | ATTR_READONLY;
2805 /* fix up mode if we're not using dynperm */
2806 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
2807 attrs->ia_mode = inode->i_mode & ~S_IWUGO;
2808 } else if ((mode & S_IWUGO) &&
2809 (cifsInode->cifsAttrs & ATTR_READONLY)) {
2811 dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
2812 /* Attributes of 0 are ignored */
2814 dosattr |= ATTR_NORMAL;
2816 /* reset local inode permissions to normal */
2817 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2818 attrs->ia_mode &= ~(S_IALLUGO);
2819 if (S_ISDIR(inode->i_mode))
2821 cifs_sb->mnt_dir_mode;
2824 cifs_sb->mnt_file_mode;
2826 } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2827 /* ignore mode change - ATTR_READONLY hasn't changed */
2828 attrs->ia_valid &= ~ATTR_MODE;
2832 if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) ||
2833 ((attrs->ia_valid & ATTR_MODE) && dosattr)) {
2834 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
2835 /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */
2837 /* Even if error on time set, no sense failing the call if
2838 the server would set the time to a reasonable value anyway,
2839 and this check ensures that we are not being called from
2840 sys_utimes in which case we ought to fail the call back to
2841 the user when the server rejects the call */
2842 if ((rc) && (attrs->ia_valid &
2843 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
2847 /* do not need local check to inode_check_ok since the server does
2850 goto cifs_setattr_exit;
2852 if ((attrs->ia_valid & ATTR_SIZE) &&
2853 attrs->ia_size != i_size_read(inode))
2854 truncate_setsize(inode, attrs->ia_size);
2856 setattr_copy(inode, attrs);
2857 mark_inode_dirty(inode);
2866 cifs_setattr(struct dentry *direntry, struct iattr *attrs)
2868 struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
2869 struct cifs_tcon *pTcon = cifs_sb_master_tcon(cifs_sb);
2871 if (pTcon->unix_ext)
2872 return cifs_setattr_unix(direntry, attrs);
2874 return cifs_setattr_nounix(direntry, attrs);
2876 /* BB: add cifs_setattr_legacy for really old servers */
2880 void cifs_delete_inode(struct inode *inode)
2882 cifs_dbg(FYI, "In cifs_delete_inode, inode = 0x%p\n", inode);
2883 /* may have to add back in if and when safe distributed caching of
2884 directories added e.g. via FindNotify */