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,
659 bool symlink, u32 reparse_tag)
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);
687 if (reparse_tag == IO_REPARSE_TAG_LX_SYMLINK) {
688 fattr->cf_mode |= S_IFLNK | cifs_sb->mnt_file_mode;
689 fattr->cf_dtype = DT_LNK;
690 } else if (reparse_tag == IO_REPARSE_TAG_LX_FIFO) {
691 fattr->cf_mode |= S_IFIFO | cifs_sb->mnt_file_mode;
692 fattr->cf_dtype = DT_FIFO;
693 } else if (reparse_tag == IO_REPARSE_TAG_AF_UNIX) {
694 fattr->cf_mode |= S_IFSOCK | cifs_sb->mnt_file_mode;
695 fattr->cf_dtype = DT_SOCK;
696 } else if (reparse_tag == IO_REPARSE_TAG_LX_CHR) {
697 fattr->cf_mode |= S_IFCHR | cifs_sb->mnt_file_mode;
698 fattr->cf_dtype = DT_CHR;
699 } else if (reparse_tag == IO_REPARSE_TAG_LX_BLK) {
700 fattr->cf_mode |= S_IFBLK | cifs_sb->mnt_file_mode;
701 fattr->cf_dtype = DT_BLK;
702 } else if (symlink) { /* TODO add more reparse tag checks */
703 fattr->cf_mode = S_IFLNK;
704 fattr->cf_dtype = DT_LNK;
705 } else if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
706 fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode;
707 fattr->cf_dtype = DT_DIR;
709 * Server can return wrong NumberOfLinks value for directories
710 * when Unix extensions are disabled - fake it.
713 fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK;
715 fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode;
716 fattr->cf_dtype = DT_REG;
718 /* clear write bits if ATTR_READONLY is set */
719 if (fattr->cf_cifsattrs & ATTR_READONLY)
720 fattr->cf_mode &= ~(S_IWUGO);
723 * Don't accept zero nlink from non-unix servers unless
724 * delete is pending. Instead mark it as unknown.
726 if ((fattr->cf_nlink < 1) && !tcon->unix_ext &&
727 !info->DeletePending) {
728 cifs_dbg(VFS, "bogus file nlink value %u\n",
730 fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK;
734 fattr->cf_uid = cifs_sb->mnt_uid;
735 fattr->cf_gid = cifs_sb->mnt_gid;
739 cifs_get_file_info(struct file *filp)
743 FILE_ALL_INFO find_data;
744 struct cifs_fattr fattr;
745 struct inode *inode = file_inode(filp);
746 struct cifsFileInfo *cfile = filp->private_data;
747 struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
748 struct TCP_Server_Info *server = tcon->ses->server;
750 if (!server->ops->query_file_info)
754 rc = server->ops->query_file_info(xid, tcon, &cfile->fid, &find_data);
757 /* TODO: add support to query reparse tag */
758 cifs_all_info_to_fattr(&fattr, &find_data, inode->i_sb, false,
759 false, 0 /* no reparse tag */);
762 cifs_create_dfs_fattr(&fattr, inode->i_sb);
768 * FIXME: legacy server -- fall back to path-based call?
769 * for now, just skip revalidating and mark inode for
773 CIFS_I(inode)->time = 0;
779 * don't bother with SFU junk here -- just mark inode as needing
782 fattr.cf_uniqueid = CIFS_I(inode)->uniqueid;
783 fattr.cf_flags |= CIFS_FATTR_NEED_REVAL;
784 cifs_fattr_to_inode(inode, &fattr);
790 /* Simple function to return a 64 bit hash of string. Rarely called */
791 static __u64 simple_hashstr(const char *str)
793 const __u64 hash_mult = 1125899906842597ULL; /* a big enough prime */
797 hash = (hash + (__u64) *str++) * hash_mult;
803 * cifs_backup_query_path_info - SMB1 fallback code to get ino
805 * Fallback code to get file metadata when we don't have access to
806 * @full_path (EACCES) and have backup creds.
808 * @data will be set to search info result buffer
809 * @resp_buf will be set to cifs resp buf and needs to be freed with
810 * cifs_buf_release() when done with @data.
813 cifs_backup_query_path_info(int xid,
814 struct cifs_tcon *tcon,
815 struct super_block *sb,
816 const char *full_path,
818 FILE_ALL_INFO **data)
820 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
821 struct cifs_search_info info = {0};
826 info.endOfSearch = false;
828 info.info_level = SMB_FIND_FILE_UNIX;
829 else if ((tcon->ses->capabilities &
830 tcon->ses->server->vals->cap_nt_find) == 0)
831 info.info_level = SMB_FIND_FILE_INFO_STANDARD;
832 else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
833 info.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
834 else /* no srvino useful for fallback to some netapp */
835 info.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
837 flags = CIFS_SEARCH_CLOSE_ALWAYS |
838 CIFS_SEARCH_CLOSE_AT_END |
839 CIFS_SEARCH_BACKUP_SEARCH;
841 rc = CIFSFindFirst(xid, tcon, full_path,
842 cifs_sb, NULL, flags, &info, false);
846 *resp_buf = (void *)info.ntwrk_buf_start;
847 *data = (FILE_ALL_INFO *)info.srch_entries_start;
852 cifs_set_fattr_ino(int xid,
853 struct cifs_tcon *tcon,
854 struct super_block *sb,
855 struct inode **inode,
856 const char *full_path,
858 struct cifs_fattr *fattr)
860 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
861 struct TCP_Server_Info *server = tcon->ses->server;
864 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
866 fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid;
868 fattr->cf_uniqueid = iunique(sb, ROOT_I);
873 * If we have an inode pass a NULL tcon to ensure we don't
874 * make a round trip to the server. This only works for SMB2+.
876 rc = server->ops->get_srv_inum(xid,
877 *inode ? NULL : tcon,
883 * If that fails reuse existing ino or generate one
884 * and disable server ones
887 fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid;
889 fattr->cf_uniqueid = iunique(sb, ROOT_I);
890 cifs_autodisable_serverino(cifs_sb);
895 /* If no errors, check for zero root inode (invalid) */
896 if (fattr->cf_uniqueid == 0 && strlen(full_path) == 0) {
897 cifs_dbg(FYI, "Invalid (0) inodenum\n");
900 fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid;
902 /* make an ino by hashing the UNC */
903 fattr->cf_flags |= CIFS_FATTR_FAKE_ROOT_INO;
904 fattr->cf_uniqueid = simple_hashstr(tcon->treeName);
909 static inline bool is_inode_cache_good(struct inode *ino)
911 return ino && CIFS_CACHE_READ(CIFS_I(ino)) && CIFS_I(ino)->time != 0;
915 cifs_get_inode_info(struct inode **inode,
916 const char *full_path,
917 FILE_ALL_INFO *in_data,
918 struct super_block *sb, int xid,
919 const struct cifs_fid *fid)
922 struct cifs_tcon *tcon;
923 struct TCP_Server_Info *server;
924 struct tcon_link *tlink;
925 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
926 bool adjust_tz = false;
927 struct cifs_fattr fattr = {0};
928 bool is_reparse_point = false;
929 FILE_ALL_INFO *data = in_data;
930 FILE_ALL_INFO *tmp_data = NULL;
931 void *smb1_backup_rsp_buf = NULL;
934 __u32 reparse_tag = 0;
936 tlink = cifs_sb_tlink(cifs_sb);
938 return PTR_ERR(tlink);
939 tcon = tlink_tcon(tlink);
940 server = tcon->ses->server;
943 * 1. Fetch file metadata if not provided (data)
947 if (is_inode_cache_good(*inode)) {
948 cifs_dbg(FYI, "No need to revalidate cached inode sizes\n");
951 tmp_data = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
956 rc = server->ops->query_path_info(xid, tcon, cifs_sb,
958 &adjust_tz, &is_reparse_point);
963 * 2. Convert it to internal cifs metadata (fattr)
969 * If the file is a reparse point, it is more complicated
970 * since we have to check if its reparse tag matches a known
971 * special file type e.g. symlink or fifo or char etc.
973 if ((le32_to_cpu(data->Attributes) & ATTR_REPARSE) &&
974 server->ops->query_reparse_tag) {
975 rc = server->ops->query_reparse_tag(xid, tcon, cifs_sb,
976 full_path, &reparse_tag);
977 cifs_dbg(FYI, "reparse tag 0x%x\n", reparse_tag);
979 cifs_all_info_to_fattr(&fattr, data, sb, adjust_tz,
980 is_reparse_point, reparse_tag);
983 /* DFS link, no metadata available on this server */
984 cifs_create_dfs_fattr(&fattr, sb);
989 * perm errors, try again with backup flags if possible
991 * For SMB2 and later the backup intent flag
992 * is already sent if needed on open and there
993 * is no path based FindFirst operation to use
996 if (backup_cred(cifs_sb) && is_smb1_server(server)) {
997 /* for easier reading */
998 FILE_DIRECTORY_INFO *fdi;
999 SEARCH_ID_FULL_DIR_INFO *si;
1001 rc = cifs_backup_query_path_info(xid, tcon, sb,
1003 &smb1_backup_rsp_buf,
1008 fdi = (FILE_DIRECTORY_INFO *)data;
1009 si = (SEARCH_ID_FULL_DIR_INFO *)data;
1011 cifs_dir_info_to_fattr(&fattr, fdi, cifs_sb);
1012 fattr.cf_uniqueid = le64_to_cpu(si->UniqueId);
1013 /* uniqueid set, skip get inum step */
1014 goto handle_mnt_opt;
1016 /* nothing we can do, bail out */
1021 cifs_dbg(FYI, "%s: unhandled err rc %d\n", __func__, rc);
1026 * 3. Get or update inode number (fattr.cf_uniqueid)
1029 cifs_set_fattr_ino(xid, tcon, sb, inode, full_path, data, &fattr);
1032 * 4. Tweak fattr based on mount options
1036 /* query for SFU type info if supported and needed */
1037 if (fattr.cf_cifsattrs & ATTR_SYSTEM &&
1038 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
1039 tmprc = cifs_sfu_type(&fattr, full_path, cifs_sb, xid);
1041 cifs_dbg(FYI, "cifs_sfu_type failed: %d\n", tmprc);
1044 /* fill in 0777 bits from ACL */
1045 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID) {
1046 rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, true,
1051 cifs_dbg(FYI, "%s: Get mode from SID failed. rc=%d\n",
1055 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
1056 rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, false,
1061 cifs_dbg(FYI, "%s: Getting ACL failed with error: %d\n",
1067 /* fill in remaining high mode bits e.g. SUID, VTX */
1068 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
1069 cifs_sfu_mode(&fattr, full_path, cifs_sb, xid);
1071 /* check for Minshall+French symlinks */
1072 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
1073 tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr,
1076 cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc);
1080 * 5. Update inode with final fattr data
1084 *inode = cifs_iget(sb, &fattr);
1088 /* we already have inode, update it */
1090 /* if uniqueid is different, return error */
1091 if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM &&
1092 CIFS_I(*inode)->uniqueid != fattr.cf_uniqueid)) {
1093 CIFS_I(*inode)->time = 0; /* force reval */
1098 /* if filetype is different, return error */
1099 if (unlikely(((*inode)->i_mode & S_IFMT) !=
1100 (fattr.cf_mode & S_IFMT))) {
1101 CIFS_I(*inode)->time = 0; /* force reval */
1106 cifs_fattr_to_inode(*inode, &fattr);
1109 cifs_buf_release(smb1_backup_rsp_buf);
1110 cifs_put_tlink(tlink);
1116 smb311_posix_get_inode_info(struct inode **inode,
1117 const char *full_path,
1118 struct super_block *sb, unsigned int xid)
1120 struct cifs_tcon *tcon;
1121 struct tcon_link *tlink;
1122 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1123 bool adjust_tz = false;
1124 struct cifs_fattr fattr = {0};
1125 bool symlink = false;
1126 struct smb311_posix_qinfo *data = NULL;
1130 tlink = cifs_sb_tlink(cifs_sb);
1132 return PTR_ERR(tlink);
1133 tcon = tlink_tcon(tlink);
1136 * 1. Fetch file metadata
1139 if (is_inode_cache_good(*inode)) {
1140 cifs_dbg(FYI, "No need to revalidate cached inode sizes\n");
1143 data = kmalloc(sizeof(struct smb311_posix_qinfo), GFP_KERNEL);
1149 rc = smb311_posix_query_path_info(xid, tcon, cifs_sb,
1151 &adjust_tz, &symlink);
1154 * 2. Convert it to internal cifs metadata (fattr)
1159 smb311_posix_info_to_fattr(&fattr, data, sb, adjust_tz, symlink);
1162 /* DFS link, no metadata available on this server */
1163 cifs_create_dfs_fattr(&fattr, sb);
1168 * For SMB2 and later the backup intent flag
1169 * is already sent if needed on open and there
1170 * is no path based FindFirst operation to use
1171 * to retry with so nothing we can do, bail out
1175 cifs_dbg(FYI, "%s: unhandled err rc %d\n", __func__, rc);
1181 * 3. Tweak fattr based on mount options
1184 /* check for Minshall+French symlinks */
1185 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
1186 tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr,
1189 cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc);
1193 * 4. Update inode with final fattr data
1197 *inode = cifs_iget(sb, &fattr);
1201 /* we already have inode, update it */
1203 /* if uniqueid is different, return error */
1204 if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM &&
1205 CIFS_I(*inode)->uniqueid != fattr.cf_uniqueid)) {
1206 CIFS_I(*inode)->time = 0; /* force reval */
1211 /* if filetype is different, return error */
1212 if (unlikely(((*inode)->i_mode & S_IFMT) !=
1213 (fattr.cf_mode & S_IFMT))) {
1214 CIFS_I(*inode)->time = 0; /* force reval */
1219 cifs_fattr_to_inode(*inode, &fattr);
1222 cifs_put_tlink(tlink);
1228 static const struct inode_operations cifs_ipc_inode_ops = {
1229 .lookup = cifs_lookup,
1233 cifs_find_inode(struct inode *inode, void *opaque)
1235 struct cifs_fattr *fattr = (struct cifs_fattr *) opaque;
1237 /* don't match inode with different uniqueid */
1238 if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid)
1241 /* use createtime like an i_generation field */
1242 if (CIFS_I(inode)->createtime != fattr->cf_createtime)
1245 /* don't match inode of different type */
1246 if ((inode->i_mode & S_IFMT) != (fattr->cf_mode & S_IFMT))
1249 /* if it's not a directory or has no dentries, then flag it */
1250 if (S_ISDIR(inode->i_mode) && !hlist_empty(&inode->i_dentry))
1251 fattr->cf_flags |= CIFS_FATTR_INO_COLLISION;
1257 cifs_init_inode(struct inode *inode, void *opaque)
1259 struct cifs_fattr *fattr = (struct cifs_fattr *) opaque;
1261 CIFS_I(inode)->uniqueid = fattr->cf_uniqueid;
1262 CIFS_I(inode)->createtime = fattr->cf_createtime;
1267 * walk dentry list for an inode and report whether it has aliases that
1268 * are hashed. We use this to determine if a directory inode can actually
1272 inode_has_hashed_dentries(struct inode *inode)
1274 struct dentry *dentry;
1276 spin_lock(&inode->i_lock);
1277 hlist_for_each_entry(dentry, &inode->i_dentry, d_u.d_alias) {
1278 if (!d_unhashed(dentry) || IS_ROOT(dentry)) {
1279 spin_unlock(&inode->i_lock);
1283 spin_unlock(&inode->i_lock);
1287 /* Given fattrs, get a corresponding inode */
1289 cifs_iget(struct super_block *sb, struct cifs_fattr *fattr)
1292 struct inode *inode;
1295 cifs_dbg(FYI, "looking for uniqueid=%llu\n", fattr->cf_uniqueid);
1297 /* hash down to 32-bits on 32-bit arch */
1298 hash = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid);
1300 inode = iget5_locked(sb, hash, cifs_find_inode, cifs_init_inode, fattr);
1302 /* was there a potentially problematic inode collision? */
1303 if (fattr->cf_flags & CIFS_FATTR_INO_COLLISION) {
1304 fattr->cf_flags &= ~CIFS_FATTR_INO_COLLISION;
1306 if (inode_has_hashed_dentries(inode)) {
1307 cifs_autodisable_serverino(CIFS_SB(sb));
1309 fattr->cf_uniqueid = iunique(sb, ROOT_I);
1310 goto retry_iget5_locked;
1314 cifs_fattr_to_inode(inode, fattr);
1315 if (sb->s_flags & SB_NOATIME)
1316 inode->i_flags |= S_NOATIME | S_NOCMTIME;
1317 if (inode->i_state & I_NEW) {
1318 inode->i_ino = hash;
1319 #ifdef CONFIG_CIFS_FSCACHE
1320 /* initialize per-inode cache cookie pointer */
1321 CIFS_I(inode)->fscache = NULL;
1323 unlock_new_inode(inode);
1330 /* gets root inode */
1331 struct inode *cifs_root_iget(struct super_block *sb)
1334 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1335 struct inode *inode = NULL;
1337 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
1341 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH)
1342 && cifs_sb->prepath) {
1343 len = strlen(cifs_sb->prepath);
1344 path = kzalloc(len + 2 /* leading sep + null */, GFP_KERNEL);
1346 return ERR_PTR(-ENOMEM);
1348 memcpy(path+1, cifs_sb->prepath, len);
1350 path = kstrdup("", GFP_KERNEL);
1352 return ERR_PTR(-ENOMEM);
1356 if (tcon->unix_ext) {
1357 rc = cifs_get_inode_info_unix(&inode, path, sb, xid);
1358 /* some servers mistakenly claim POSIX support */
1359 if (rc != -EOPNOTSUPP)
1361 cifs_dbg(VFS, "server does not support POSIX extensions\n");
1362 tcon->unix_ext = false;
1365 convert_delimiter(path, CIFS_DIR_SEP(cifs_sb));
1366 if (tcon->posix_extensions)
1367 rc = smb311_posix_get_inode_info(&inode, path, sb, xid);
1369 rc = cifs_get_inode_info(&inode, path, NULL, sb, xid, NULL);
1373 inode = ERR_PTR(rc);
1377 #ifdef CONFIG_CIFS_FSCACHE
1378 /* populate tcon->resource_id */
1379 tcon->resource_id = CIFS_I(inode)->uniqueid;
1382 if (rc && tcon->pipe) {
1383 cifs_dbg(FYI, "ipc connection - fake read inode\n");
1384 spin_lock(&inode->i_lock);
1385 inode->i_mode |= S_IFDIR;
1386 set_nlink(inode, 2);
1387 inode->i_op = &cifs_ipc_inode_ops;
1388 inode->i_fop = &simple_dir_operations;
1389 inode->i_uid = cifs_sb->mnt_uid;
1390 inode->i_gid = cifs_sb->mnt_gid;
1391 spin_unlock(&inode->i_lock);
1394 inode = ERR_PTR(rc);
1404 cifs_set_file_info(struct inode *inode, struct iattr *attrs, unsigned int xid,
1405 char *full_path, __u32 dosattr)
1407 bool set_time = false;
1408 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1409 struct TCP_Server_Info *server;
1410 FILE_BASIC_INFO info_buf;
1415 server = cifs_sb_master_tcon(cifs_sb)->ses->server;
1416 if (!server->ops->set_file_info)
1421 if (attrs->ia_valid & ATTR_ATIME) {
1423 info_buf.LastAccessTime =
1424 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1426 info_buf.LastAccessTime = 0;
1428 if (attrs->ia_valid & ATTR_MTIME) {
1430 info_buf.LastWriteTime =
1431 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1433 info_buf.LastWriteTime = 0;
1436 * Samba throws this field away, but windows may actually use it.
1437 * Do not set ctime unless other time stamps are changed explicitly
1438 * (i.e. by utimes()) since we would then have a mix of client and
1441 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1442 cifs_dbg(FYI, "CIFS - CTIME changed\n");
1443 info_buf.ChangeTime =
1444 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1446 info_buf.ChangeTime = 0;
1448 info_buf.CreationTime = 0; /* don't change */
1449 info_buf.Attributes = cpu_to_le32(dosattr);
1451 return server->ops->set_file_info(inode, full_path, &info_buf, xid);
1455 * Open the given file (if it isn't already), set the DELETE_ON_CLOSE bit
1456 * and rename it to a random name that hopefully won't conflict with
1460 cifs_rename_pending_delete(const char *full_path, struct dentry *dentry,
1461 const unsigned int xid)
1465 struct cifs_fid fid;
1466 struct cifs_open_parms oparms;
1467 struct inode *inode = d_inode(dentry);
1468 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1469 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1470 struct tcon_link *tlink;
1471 struct cifs_tcon *tcon;
1472 __u32 dosattr, origattr;
1473 FILE_BASIC_INFO *info_buf = NULL;
1475 tlink = cifs_sb_tlink(cifs_sb);
1477 return PTR_ERR(tlink);
1478 tcon = tlink_tcon(tlink);
1481 * We cannot rename the file if the server doesn't support
1482 * CAP_INFOLEVEL_PASSTHRU
1484 if (!(tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)) {
1490 oparms.cifs_sb = cifs_sb;
1491 oparms.desired_access = DELETE | FILE_WRITE_ATTRIBUTES;
1492 oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR);
1493 oparms.disposition = FILE_OPEN;
1494 oparms.path = full_path;
1496 oparms.reconnect = false;
1498 rc = CIFS_open(xid, &oparms, &oplock, NULL);
1502 origattr = cifsInode->cifsAttrs;
1504 origattr |= ATTR_NORMAL;
1506 dosattr = origattr & ~ATTR_READONLY;
1508 dosattr |= ATTR_NORMAL;
1509 dosattr |= ATTR_HIDDEN;
1511 /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */
1512 if (dosattr != origattr) {
1513 info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL);
1514 if (info_buf == NULL) {
1518 info_buf->Attributes = cpu_to_le32(dosattr);
1519 rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid,
1521 /* although we would like to mark the file hidden
1522 if that fails we will still try to rename it */
1524 cifsInode->cifsAttrs = dosattr;
1526 dosattr = origattr; /* since not able to change them */
1529 /* rename the file */
1530 rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, NULL,
1532 cifs_remap(cifs_sb));
1538 /* try to set DELETE_ON_CLOSE */
1539 if (!test_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags)) {
1540 rc = CIFSSMBSetFileDisposition(xid, tcon, true, fid.netfid,
1543 * some samba versions return -ENOENT when we try to set the
1544 * file disposition here. Likely a samba bug, but work around
1545 * it for now. This means that some cifsXXX files may hang
1546 * around after they shouldn't.
1548 * BB: remove this hack after more servers have the fix
1556 set_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags);
1560 CIFSSMBClose(xid, tcon, fid.netfid);
1563 cifs_put_tlink(tlink);
1567 * reset everything back to the original state. Don't bother
1568 * dealing with errors here since we can't do anything about
1572 CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, dentry->d_name.name,
1573 cifs_sb->local_nls, cifs_remap(cifs_sb));
1575 if (dosattr != origattr) {
1576 info_buf->Attributes = cpu_to_le32(origattr);
1577 if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid,
1579 cifsInode->cifsAttrs = origattr;
1585 /* copied from fs/nfs/dir.c with small changes */
1587 cifs_drop_nlink(struct inode *inode)
1589 spin_lock(&inode->i_lock);
1590 if (inode->i_nlink > 0)
1592 spin_unlock(&inode->i_lock);
1596 * If d_inode(dentry) is null (usually meaning the cached dentry
1597 * is a negative dentry) then we would attempt a standard SMB delete, but
1598 * if that fails we can not attempt the fall back mechanisms on EACCES
1599 * but will return the EACCES to the caller. Note that the VFS does not call
1600 * unlink on negative dentries currently.
1602 int cifs_unlink(struct inode *dir, struct dentry *dentry)
1606 char *full_path = NULL;
1607 struct inode *inode = d_inode(dentry);
1608 struct cifsInodeInfo *cifs_inode;
1609 struct super_block *sb = dir->i_sb;
1610 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1611 struct tcon_link *tlink;
1612 struct cifs_tcon *tcon;
1613 struct TCP_Server_Info *server;
1614 struct iattr *attrs = NULL;
1615 __u32 dosattr = 0, origattr = 0;
1617 cifs_dbg(FYI, "cifs_unlink, dir=0x%p, dentry=0x%p\n", dir, dentry);
1619 tlink = cifs_sb_tlink(cifs_sb);
1621 return PTR_ERR(tlink);
1622 tcon = tlink_tcon(tlink);
1623 server = tcon->ses->server;
1627 if (tcon->nodelete) {
1632 /* Unlink can be called from rename so we can not take the
1633 * sb->s_vfs_rename_mutex here */
1634 full_path = build_path_from_dentry(dentry);
1635 if (full_path == NULL) {
1640 if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1641 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1642 rc = CIFSPOSIXDelFile(xid, tcon, full_path,
1643 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
1644 cifs_remap(cifs_sb));
1645 cifs_dbg(FYI, "posix del rc %d\n", rc);
1646 if ((rc == 0) || (rc == -ENOENT))
1647 goto psx_del_no_retry;
1651 if (!server->ops->unlink) {
1653 goto psx_del_no_retry;
1656 rc = server->ops->unlink(xid, tcon, full_path, cifs_sb);
1661 cifs_drop_nlink(inode);
1662 } else if (rc == -ENOENT) {
1664 } else if (rc == -EBUSY) {
1665 if (server->ops->rename_pending_delete) {
1666 rc = server->ops->rename_pending_delete(full_path,
1669 cifs_drop_nlink(inode);
1671 } else if ((rc == -EACCES) && (dosattr == 0) && inode) {
1672 attrs = kzalloc(sizeof(*attrs), GFP_KERNEL);
1673 if (attrs == NULL) {
1678 /* try to reset dos attributes */
1679 cifs_inode = CIFS_I(inode);
1680 origattr = cifs_inode->cifsAttrs;
1682 origattr |= ATTR_NORMAL;
1683 dosattr = origattr & ~ATTR_READONLY;
1685 dosattr |= ATTR_NORMAL;
1686 dosattr |= ATTR_HIDDEN;
1688 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
1692 goto retry_std_delete;
1695 /* undo the setattr if we errored out and it's needed */
1696 if (rc != 0 && dosattr != 0)
1697 cifs_set_file_info(inode, attrs, xid, full_path, origattr);
1701 cifs_inode = CIFS_I(inode);
1702 cifs_inode->time = 0; /* will force revalidate to get info
1704 inode->i_ctime = current_time(inode);
1706 dir->i_ctime = dir->i_mtime = current_time(dir);
1707 cifs_inode = CIFS_I(dir);
1708 CIFS_I(dir)->time = 0; /* force revalidate of dir as well */
1713 cifs_put_tlink(tlink);
1718 cifs_mkdir_qinfo(struct inode *parent, struct dentry *dentry, umode_t mode,
1719 const char *full_path, struct cifs_sb_info *cifs_sb,
1720 struct cifs_tcon *tcon, const unsigned int xid)
1723 struct inode *inode = NULL;
1725 if (tcon->posix_extensions)
1726 rc = smb311_posix_get_inode_info(&inode, full_path, parent->i_sb, xid);
1727 else if (tcon->unix_ext)
1728 rc = cifs_get_inode_info_unix(&inode, full_path, parent->i_sb,
1731 rc = cifs_get_inode_info(&inode, full_path, NULL, parent->i_sb,
1738 * setting nlink not necessary except in cases where we failed to get it
1739 * from the server or was set bogus. Also, since this is a brand new
1740 * inode, no need to grab the i_lock before setting the i_nlink.
1742 if (inode->i_nlink < 2)
1743 set_nlink(inode, 2);
1744 mode &= ~current_umask();
1745 /* must turn on setgid bit if parent dir has it */
1746 if (parent->i_mode & S_ISGID)
1749 if (tcon->unix_ext) {
1750 struct cifs_unix_set_info_args args = {
1752 .ctime = NO_CHANGE_64,
1753 .atime = NO_CHANGE_64,
1754 .mtime = NO_CHANGE_64,
1757 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1758 args.uid = current_fsuid();
1759 if (parent->i_mode & S_ISGID)
1760 args.gid = parent->i_gid;
1762 args.gid = current_fsgid();
1764 args.uid = INVALID_UID; /* no change */
1765 args.gid = INVALID_GID; /* no change */
1767 CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args,
1769 cifs_remap(cifs_sb));
1771 struct TCP_Server_Info *server = tcon->ses->server;
1772 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
1773 (mode & S_IWUGO) == 0 && server->ops->mkdir_setinfo)
1774 server->ops->mkdir_setinfo(inode, full_path, cifs_sb,
1776 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
1777 inode->i_mode = (mode | S_IFDIR);
1779 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1780 inode->i_uid = current_fsuid();
1781 if (inode->i_mode & S_ISGID)
1782 inode->i_gid = parent->i_gid;
1784 inode->i_gid = current_fsgid();
1787 d_instantiate(dentry, inode);
1792 cifs_posix_mkdir(struct inode *inode, struct dentry *dentry, umode_t mode,
1793 const char *full_path, struct cifs_sb_info *cifs_sb,
1794 struct cifs_tcon *tcon, const unsigned int xid)
1798 FILE_UNIX_BASIC_INFO *info = NULL;
1799 struct inode *newinode = NULL;
1800 struct cifs_fattr fattr;
1802 info = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1805 goto posix_mkdir_out;
1808 mode &= ~current_umask();
1809 rc = CIFSPOSIXCreate(xid, tcon, SMB_O_DIRECTORY | SMB_O_CREAT, mode,
1810 NULL /* netfid */, info, &oplock, full_path,
1811 cifs_sb->local_nls, cifs_remap(cifs_sb));
1812 if (rc == -EOPNOTSUPP)
1813 goto posix_mkdir_out;
1815 cifs_dbg(FYI, "posix mkdir returned 0x%x\n", rc);
1817 goto posix_mkdir_out;
1820 if (info->Type == cpu_to_le32(-1))
1821 /* no return info, go query for it */
1822 goto posix_mkdir_get_info;
1824 * BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if
1825 * need to set uid/gid.
1828 cifs_unix_basic_to_fattr(&fattr, info, cifs_sb);
1829 cifs_fill_uniqueid(inode->i_sb, &fattr);
1830 newinode = cifs_iget(inode->i_sb, &fattr);
1832 goto posix_mkdir_get_info;
1834 d_instantiate(dentry, newinode);
1836 #ifdef CONFIG_CIFS_DEBUG2
1837 cifs_dbg(FYI, "instantiated dentry %p %pd to inode %p\n",
1838 dentry, dentry, newinode);
1840 if (newinode->i_nlink != 2)
1841 cifs_dbg(FYI, "unexpected number of links %d\n",
1848 posix_mkdir_get_info:
1849 rc = cifs_mkdir_qinfo(inode, dentry, mode, full_path, cifs_sb, tcon,
1851 goto posix_mkdir_out;
1854 int cifs_mkdir(struct inode *inode, struct dentry *direntry, umode_t mode)
1858 struct cifs_sb_info *cifs_sb;
1859 struct tcon_link *tlink;
1860 struct cifs_tcon *tcon;
1861 struct TCP_Server_Info *server;
1864 cifs_dbg(FYI, "In cifs_mkdir, mode = %04ho inode = 0x%p\n",
1867 cifs_sb = CIFS_SB(inode->i_sb);
1868 tlink = cifs_sb_tlink(cifs_sb);
1870 return PTR_ERR(tlink);
1871 tcon = tlink_tcon(tlink);
1875 full_path = build_path_from_dentry(direntry);
1876 if (full_path == NULL) {
1881 server = tcon->ses->server;
1883 if ((server->ops->posix_mkdir) && (tcon->posix_extensions)) {
1884 rc = server->ops->posix_mkdir(xid, inode, mode, tcon, full_path,
1886 d_drop(direntry); /* for time being always refresh inode info */
1890 if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1891 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1892 rc = cifs_posix_mkdir(inode, direntry, mode, full_path, cifs_sb,
1894 if (rc != -EOPNOTSUPP)
1898 if (!server->ops->mkdir) {
1903 /* BB add setting the equivalent of mode via CreateX w/ACLs */
1904 rc = server->ops->mkdir(xid, inode, mode, tcon, full_path, cifs_sb);
1906 cifs_dbg(FYI, "cifs_mkdir returned 0x%x\n", rc);
1911 /* TODO: skip this for smb2/smb3 */
1912 rc = cifs_mkdir_qinfo(inode, direntry, mode, full_path, cifs_sb, tcon,
1916 * Force revalidate to get parent dir info when needed since cached
1917 * attributes are invalid now.
1919 CIFS_I(inode)->time = 0;
1922 cifs_put_tlink(tlink);
1926 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1930 struct cifs_sb_info *cifs_sb;
1931 struct tcon_link *tlink;
1932 struct cifs_tcon *tcon;
1933 struct TCP_Server_Info *server;
1934 char *full_path = NULL;
1935 struct cifsInodeInfo *cifsInode;
1937 cifs_dbg(FYI, "cifs_rmdir, inode = 0x%p\n", inode);
1941 full_path = build_path_from_dentry(direntry);
1942 if (full_path == NULL) {
1947 cifs_sb = CIFS_SB(inode->i_sb);
1948 tlink = cifs_sb_tlink(cifs_sb);
1949 if (IS_ERR(tlink)) {
1950 rc = PTR_ERR(tlink);
1953 tcon = tlink_tcon(tlink);
1954 server = tcon->ses->server;
1956 if (!server->ops->rmdir) {
1958 cifs_put_tlink(tlink);
1962 if (tcon->nodelete) {
1964 cifs_put_tlink(tlink);
1968 rc = server->ops->rmdir(xid, tcon, full_path, cifs_sb);
1969 cifs_put_tlink(tlink);
1972 spin_lock(&d_inode(direntry)->i_lock);
1973 i_size_write(d_inode(direntry), 0);
1974 clear_nlink(d_inode(direntry));
1975 spin_unlock(&d_inode(direntry)->i_lock);
1978 cifsInode = CIFS_I(d_inode(direntry));
1979 /* force revalidate to go get info when needed */
1980 cifsInode->time = 0;
1982 cifsInode = CIFS_I(inode);
1984 * Force revalidate to get parent dir info when needed since cached
1985 * attributes are invalid now.
1987 cifsInode->time = 0;
1989 d_inode(direntry)->i_ctime = inode->i_ctime = inode->i_mtime =
1990 current_time(inode);
1999 cifs_do_rename(const unsigned int xid, struct dentry *from_dentry,
2000 const char *from_path, struct dentry *to_dentry,
2001 const char *to_path)
2003 struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb);
2004 struct tcon_link *tlink;
2005 struct cifs_tcon *tcon;
2006 struct TCP_Server_Info *server;
2007 struct cifs_fid fid;
2008 struct cifs_open_parms oparms;
2011 tlink = cifs_sb_tlink(cifs_sb);
2013 return PTR_ERR(tlink);
2014 tcon = tlink_tcon(tlink);
2015 server = tcon->ses->server;
2017 if (!server->ops->rename)
2020 /* try path-based rename first */
2021 rc = server->ops->rename(xid, tcon, from_path, to_path, cifs_sb);
2024 * Don't bother with rename by filehandle unless file is busy and
2025 * source. Note that cross directory moves do not work with
2026 * rename by filehandle to various Windows servers.
2028 if (rc == 0 || rc != -EBUSY)
2029 goto do_rename_exit;
2031 /* Don't fall back to using SMB on SMB 2+ mount */
2032 if (server->vals->protocol_id != 0)
2033 goto do_rename_exit;
2035 /* open-file renames don't work across directories */
2036 if (to_dentry->d_parent != from_dentry->d_parent)
2037 goto do_rename_exit;
2040 oparms.cifs_sb = cifs_sb;
2041 /* open the file to be renamed -- we need DELETE perms */
2042 oparms.desired_access = DELETE;
2043 oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR);
2044 oparms.disposition = FILE_OPEN;
2045 oparms.path = from_path;
2047 oparms.reconnect = false;
2049 rc = CIFS_open(xid, &oparms, &oplock, NULL);
2051 rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid,
2052 (const char *) to_dentry->d_name.name,
2053 cifs_sb->local_nls, cifs_remap(cifs_sb));
2054 CIFSSMBClose(xid, tcon, fid.netfid);
2058 d_move(from_dentry, to_dentry);
2059 cifs_put_tlink(tlink);
2064 cifs_rename2(struct inode *source_dir, struct dentry *source_dentry,
2065 struct inode *target_dir, struct dentry *target_dentry,
2068 char *from_name = NULL;
2069 char *to_name = NULL;
2070 struct cifs_sb_info *cifs_sb;
2071 struct tcon_link *tlink;
2072 struct cifs_tcon *tcon;
2073 FILE_UNIX_BASIC_INFO *info_buf_source = NULL;
2074 FILE_UNIX_BASIC_INFO *info_buf_target;
2078 if (flags & ~RENAME_NOREPLACE)
2081 cifs_sb = CIFS_SB(source_dir->i_sb);
2082 tlink = cifs_sb_tlink(cifs_sb);
2084 return PTR_ERR(tlink);
2085 tcon = tlink_tcon(tlink);
2090 * we already have the rename sem so we do not need to
2091 * grab it again here to protect the path integrity
2093 from_name = build_path_from_dentry(source_dentry);
2094 if (from_name == NULL) {
2096 goto cifs_rename_exit;
2099 to_name = build_path_from_dentry(target_dentry);
2100 if (to_name == NULL) {
2102 goto cifs_rename_exit;
2105 rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry,
2109 * No-replace is the natural behavior for CIFS, so skip unlink hacks.
2111 if (flags & RENAME_NOREPLACE)
2112 goto cifs_rename_exit;
2114 if (rc == -EEXIST && tcon->unix_ext) {
2116 * Are src and dst hardlinks of same inode? We can only tell
2117 * with unix extensions enabled.
2120 kmalloc_array(2, sizeof(FILE_UNIX_BASIC_INFO),
2122 if (info_buf_source == NULL) {
2124 goto cifs_rename_exit;
2127 info_buf_target = info_buf_source + 1;
2128 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, from_name,
2131 cifs_remap(cifs_sb));
2135 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, to_name,
2138 cifs_remap(cifs_sb));
2140 if (tmprc == 0 && (info_buf_source->UniqueId ==
2141 info_buf_target->UniqueId)) {
2142 /* same file, POSIX says that this is a noop */
2144 goto cifs_rename_exit;
2148 * else ... BB we could add the same check for Windows by
2149 * checking the UniqueId via FILE_INTERNAL_INFO
2153 /* Try unlinking the target dentry if it's not negative */
2154 if (d_really_is_positive(target_dentry) && (rc == -EACCES || rc == -EEXIST)) {
2155 if (d_is_dir(target_dentry))
2156 tmprc = cifs_rmdir(target_dir, target_dentry);
2158 tmprc = cifs_unlink(target_dir, target_dentry);
2160 goto cifs_rename_exit;
2161 rc = cifs_do_rename(xid, source_dentry, from_name,
2162 target_dentry, to_name);
2165 /* force revalidate to go get info when needed */
2166 CIFS_I(source_dir)->time = CIFS_I(target_dir)->time = 0;
2168 source_dir->i_ctime = source_dir->i_mtime = target_dir->i_ctime =
2169 target_dir->i_mtime = current_time(source_dir);
2172 kfree(info_buf_source);
2176 cifs_put_tlink(tlink);
2181 cifs_inode_needs_reval(struct inode *inode)
2183 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2184 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2186 if (cifs_i->time == 0)
2189 if (CIFS_CACHE_READ(cifs_i))
2192 if (!lookupCacheEnabled)
2195 if (!cifs_sb->actimeo)
2198 if (!time_in_range(jiffies, cifs_i->time,
2199 cifs_i->time + cifs_sb->actimeo))
2202 /* hardlinked files w/ noserverino get "special" treatment */
2203 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) &&
2204 S_ISREG(inode->i_mode) && inode->i_nlink != 1)
2211 * Zap the cache. Called when invalid_mapping flag is set.
2214 cifs_invalidate_mapping(struct inode *inode)
2218 if (inode->i_mapping && inode->i_mapping->nrpages != 0) {
2219 rc = invalidate_inode_pages2(inode->i_mapping);
2221 cifs_dbg(VFS, "%s: Could not invalidate inode %p\n",
2225 cifs_fscache_reset_inode_cookie(inode);
2230 * cifs_wait_bit_killable - helper for functions that are sleeping on bit locks
2231 * @word: long word containing the bit lock
2234 cifs_wait_bit_killable(struct wait_bit_key *key, int mode)
2236 freezable_schedule_unsafe();
2237 if (signal_pending_state(mode, current))
2238 return -ERESTARTSYS;
2243 cifs_revalidate_mapping(struct inode *inode)
2246 unsigned long *flags = &CIFS_I(inode)->flags;
2248 /* swapfiles are not supposed to be shared */
2249 if (IS_SWAPFILE(inode))
2252 rc = wait_on_bit_lock_action(flags, CIFS_INO_LOCK, cifs_wait_bit_killable,
2257 if (test_and_clear_bit(CIFS_INO_INVALID_MAPPING, flags)) {
2258 rc = cifs_invalidate_mapping(inode);
2260 set_bit(CIFS_INO_INVALID_MAPPING, flags);
2263 clear_bit_unlock(CIFS_INO_LOCK, flags);
2264 smp_mb__after_atomic();
2265 wake_up_bit(flags, CIFS_INO_LOCK);
2271 cifs_zap_mapping(struct inode *inode)
2273 set_bit(CIFS_INO_INVALID_MAPPING, &CIFS_I(inode)->flags);
2274 return cifs_revalidate_mapping(inode);
2277 int cifs_revalidate_file_attr(struct file *filp)
2280 struct inode *inode = file_inode(filp);
2281 struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data;
2283 if (!cifs_inode_needs_reval(inode))
2286 if (tlink_tcon(cfile->tlink)->unix_ext)
2287 rc = cifs_get_file_info_unix(filp);
2289 rc = cifs_get_file_info(filp);
2294 int cifs_revalidate_dentry_attr(struct dentry *dentry)
2298 struct inode *inode = d_inode(dentry);
2299 struct super_block *sb = dentry->d_sb;
2300 char *full_path = NULL;
2306 if (!cifs_inode_needs_reval(inode))
2311 /* can not safely grab the rename sem here if rename calls revalidate
2312 since that would deadlock */
2313 full_path = build_path_from_dentry(dentry);
2314 if (full_path == NULL) {
2319 cifs_dbg(FYI, "Update attributes: %s inode 0x%p count %d dentry: 0x%p d_time %ld jiffies %ld\n",
2320 full_path, inode, inode->i_count.counter,
2321 dentry, cifs_get_time(dentry), jiffies);
2324 if (cifs_sb_master_tcon(CIFS_SB(sb))->posix_extensions)
2325 rc = smb311_posix_get_inode_info(&inode, full_path, sb, xid);
2326 else if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext)
2327 rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid);
2329 rc = cifs_get_inode_info(&inode, full_path, NULL, sb,
2331 if (rc == -EAGAIN && count++ < 10)
2340 int cifs_revalidate_file(struct file *filp)
2343 struct inode *inode = file_inode(filp);
2345 rc = cifs_revalidate_file_attr(filp);
2349 return cifs_revalidate_mapping(inode);
2352 /* revalidate a dentry's inode attributes */
2353 int cifs_revalidate_dentry(struct dentry *dentry)
2356 struct inode *inode = d_inode(dentry);
2358 rc = cifs_revalidate_dentry_attr(dentry);
2362 return cifs_revalidate_mapping(inode);
2365 int cifs_getattr(const struct path *path, struct kstat *stat,
2366 u32 request_mask, unsigned int flags)
2368 struct dentry *dentry = path->dentry;
2369 struct cifs_sb_info *cifs_sb = CIFS_SB(dentry->d_sb);
2370 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
2371 struct inode *inode = d_inode(dentry);
2375 * We need to be sure that all dirty pages are written and the server
2376 * has actual ctime, mtime and file length.
2378 if ((request_mask & (STATX_CTIME | STATX_MTIME | STATX_SIZE)) &&
2379 !CIFS_CACHE_READ(CIFS_I(inode)) &&
2380 inode->i_mapping && inode->i_mapping->nrpages != 0) {
2381 rc = filemap_fdatawait(inode->i_mapping);
2383 mapping_set_error(inode->i_mapping, rc);
2388 if ((flags & AT_STATX_SYNC_TYPE) == AT_STATX_FORCE_SYNC)
2389 CIFS_I(inode)->time = 0; /* force revalidate */
2392 * If the caller doesn't require syncing, only sync if
2393 * necessary (e.g. due to earlier truncate or setattr
2394 * invalidating the cached metadata)
2396 if (((flags & AT_STATX_SYNC_TYPE) != AT_STATX_DONT_SYNC) ||
2397 (CIFS_I(inode)->time == 0)) {
2398 rc = cifs_revalidate_dentry_attr(dentry);
2403 generic_fillattr(inode, stat);
2404 stat->blksize = cifs_sb->bsize;
2405 stat->ino = CIFS_I(inode)->uniqueid;
2407 /* old CIFS Unix Extensions doesn't return create time */
2408 if (CIFS_I(inode)->createtime) {
2409 stat->result_mask |= STATX_BTIME;
2411 cifs_NTtimeToUnix(cpu_to_le64(CIFS_I(inode)->createtime));
2414 stat->attributes_mask |= (STATX_ATTR_COMPRESSED | STATX_ATTR_ENCRYPTED);
2415 if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_COMPRESSED)
2416 stat->attributes |= STATX_ATTR_COMPRESSED;
2417 if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_ENCRYPTED)
2418 stat->attributes |= STATX_ATTR_ENCRYPTED;
2421 * If on a multiuser mount without unix extensions or cifsacl being
2422 * enabled, and the admin hasn't overridden them, set the ownership
2423 * to the fsuid/fsgid of the current process.
2425 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) &&
2426 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
2428 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID))
2429 stat->uid = current_fsuid();
2430 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID))
2431 stat->gid = current_fsgid();
2436 int cifs_fiemap(struct inode *inode, struct fiemap_extent_info *fei, u64 start,
2439 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2440 struct cifs_sb_info *cifs_sb = CIFS_SB(cifs_i->vfs_inode.i_sb);
2441 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
2442 struct TCP_Server_Info *server = tcon->ses->server;
2443 struct cifsFileInfo *cfile;
2447 * We need to be sure that all dirty pages are written as they
2448 * might fill holes on the server.
2450 if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
2451 inode->i_mapping->nrpages != 0) {
2452 rc = filemap_fdatawait(inode->i_mapping);
2454 mapping_set_error(inode->i_mapping, rc);
2459 cfile = find_readable_file(cifs_i, false);
2463 if (server->ops->fiemap) {
2464 rc = server->ops->fiemap(tcon, cfile, fei, start, len);
2465 cifsFileInfo_put(cfile);
2469 cifsFileInfo_put(cfile);
2473 int cifs_truncate_page(struct address_space *mapping, loff_t from)
2475 pgoff_t index = from >> PAGE_SHIFT;
2476 unsigned offset = from & (PAGE_SIZE - 1);
2480 page = grab_cache_page(mapping, index);
2484 zero_user_segment(page, offset, PAGE_SIZE);
2490 void cifs_setsize(struct inode *inode, loff_t offset)
2492 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2494 spin_lock(&inode->i_lock);
2495 i_size_write(inode, offset);
2496 spin_unlock(&inode->i_lock);
2498 /* Cached inode must be refreshed on truncate */
2500 truncate_pagecache(inode, offset);
2504 cifs_set_file_size(struct inode *inode, struct iattr *attrs,
2505 unsigned int xid, char *full_path)
2508 struct cifsFileInfo *open_file;
2509 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2510 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2511 struct tcon_link *tlink = NULL;
2512 struct cifs_tcon *tcon = NULL;
2513 struct TCP_Server_Info *server;
2516 * To avoid spurious oplock breaks from server, in the case of
2517 * inodes that we already have open, avoid doing path based
2518 * setting of file size if we can do it by handle.
2519 * This keeps our caching token (oplock) and avoids timeouts
2520 * when the local oplock break takes longer to flush
2521 * writebehind data than the SMB timeout for the SetPathInfo
2522 * request would allow
2524 open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY);
2526 tcon = tlink_tcon(open_file->tlink);
2527 server = tcon->ses->server;
2528 if (server->ops->set_file_size)
2529 rc = server->ops->set_file_size(xid, tcon, open_file,
2530 attrs->ia_size, false);
2533 cifsFileInfo_put(open_file);
2534 cifs_dbg(FYI, "SetFSize for attrs rc = %d\n", rc);
2542 tlink = cifs_sb_tlink(cifs_sb);
2544 return PTR_ERR(tlink);
2545 tcon = tlink_tcon(tlink);
2546 server = tcon->ses->server;
2550 * Set file size by pathname rather than by handle either because no
2551 * valid, writeable file handle for it was found or because there was
2552 * an error setting it by handle.
2554 if (server->ops->set_path_size)
2555 rc = server->ops->set_path_size(xid, tcon, full_path,
2556 attrs->ia_size, cifs_sb, false);
2559 cifs_dbg(FYI, "SetEOF by path (setattrs) rc = %d\n", rc);
2562 cifs_put_tlink(tlink);
2566 cifsInode->server_eof = attrs->ia_size;
2567 cifs_setsize(inode, attrs->ia_size);
2570 * The man page of truncate says if the size changed,
2571 * then the st_ctime and st_mtime fields for the file
2574 attrs->ia_ctime = attrs->ia_mtime = current_time(inode);
2575 attrs->ia_valid |= ATTR_CTIME | ATTR_MTIME;
2577 cifs_truncate_page(inode->i_mapping, inode->i_size);
2584 cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
2588 char *full_path = NULL;
2589 struct inode *inode = d_inode(direntry);
2590 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2591 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2592 struct tcon_link *tlink;
2593 struct cifs_tcon *pTcon;
2594 struct cifs_unix_set_info_args *args = NULL;
2595 struct cifsFileInfo *open_file;
2597 cifs_dbg(FYI, "setattr_unix on file %pd attrs->ia_valid=0x%x\n",
2598 direntry, attrs->ia_valid);
2602 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
2603 attrs->ia_valid |= ATTR_FORCE;
2605 rc = setattr_prepare(direntry, attrs);
2609 full_path = build_path_from_dentry(direntry);
2610 if (full_path == NULL) {
2616 * Attempt to flush data before changing attributes. We need to do
2617 * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the
2618 * ownership or mode then we may also need to do this. Here, we take
2619 * the safe way out and just do the flush on all setattr requests. If
2620 * the flush returns error, store it to report later and continue.
2622 * BB: This should be smarter. Why bother flushing pages that
2623 * will be truncated anyway? Also, should we error out here if
2624 * the flush returns error?
2626 rc = filemap_write_and_wait(inode->i_mapping);
2627 if (is_interrupt_error(rc)) {
2632 mapping_set_error(inode->i_mapping, rc);
2635 if (attrs->ia_valid & ATTR_SIZE) {
2636 rc = cifs_set_file_size(inode, attrs, xid, full_path);
2641 /* skip mode change if it's just for clearing setuid/setgid */
2642 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
2643 attrs->ia_valid &= ~ATTR_MODE;
2645 args = kmalloc(sizeof(*args), GFP_KERNEL);
2651 /* set up the struct */
2652 if (attrs->ia_valid & ATTR_MODE)
2653 args->mode = attrs->ia_mode;
2655 args->mode = NO_CHANGE_64;
2657 if (attrs->ia_valid & ATTR_UID)
2658 args->uid = attrs->ia_uid;
2660 args->uid = INVALID_UID; /* no change */
2662 if (attrs->ia_valid & ATTR_GID)
2663 args->gid = attrs->ia_gid;
2665 args->gid = INVALID_GID; /* no change */
2667 if (attrs->ia_valid & ATTR_ATIME)
2668 args->atime = cifs_UnixTimeToNT(attrs->ia_atime);
2670 args->atime = NO_CHANGE_64;
2672 if (attrs->ia_valid & ATTR_MTIME)
2673 args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime);
2675 args->mtime = NO_CHANGE_64;
2677 if (attrs->ia_valid & ATTR_CTIME)
2678 args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime);
2680 args->ctime = NO_CHANGE_64;
2683 open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY);
2685 u16 nfid = open_file->fid.netfid;
2686 u32 npid = open_file->pid;
2687 pTcon = tlink_tcon(open_file->tlink);
2688 rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid);
2689 cifsFileInfo_put(open_file);
2691 tlink = cifs_sb_tlink(cifs_sb);
2692 if (IS_ERR(tlink)) {
2693 rc = PTR_ERR(tlink);
2696 pTcon = tlink_tcon(tlink);
2697 rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args,
2699 cifs_remap(cifs_sb));
2700 cifs_put_tlink(tlink);
2706 if ((attrs->ia_valid & ATTR_SIZE) &&
2707 attrs->ia_size != i_size_read(inode))
2708 truncate_setsize(inode, attrs->ia_size);
2710 setattr_copy(inode, attrs);
2711 mark_inode_dirty(inode);
2713 /* force revalidate when any of these times are set since some
2714 of the fs types (eg ext3, fat) do not have fine enough
2715 time granularity to match protocol, and we do not have a
2716 a way (yet) to query the server fs's time granularity (and
2717 whether it rounds times down).
2719 if (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME))
2720 cifsInode->time = 0;
2729 cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
2732 kuid_t uid = INVALID_UID;
2733 kgid_t gid = INVALID_GID;
2734 struct inode *inode = d_inode(direntry);
2735 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2736 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2737 struct cifsFileInfo *wfile;
2738 struct cifs_tcon *tcon;
2739 char *full_path = NULL;
2742 __u64 mode = NO_CHANGE_64;
2746 cifs_dbg(FYI, "setattr on file %pd attrs->ia_valid 0x%x\n",
2747 direntry, attrs->ia_valid);
2749 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
2750 attrs->ia_valid |= ATTR_FORCE;
2752 rc = setattr_prepare(direntry, attrs);
2758 full_path = build_path_from_dentry(direntry);
2759 if (full_path == NULL) {
2766 * Attempt to flush data before changing attributes. We need to do
2767 * this for ATTR_SIZE and ATTR_MTIME. If the flush of the data
2768 * returns error, store it to report later and continue.
2770 * BB: This should be smarter. Why bother flushing pages that
2771 * will be truncated anyway? Also, should we error out here if
2772 * the flush returns error? Do we need to check for ATTR_MTIME_SET flag?
2774 if (attrs->ia_valid & (ATTR_MTIME | ATTR_SIZE | ATTR_CTIME)) {
2775 rc = filemap_write_and_wait(inode->i_mapping);
2776 if (is_interrupt_error(rc)) {
2778 goto cifs_setattr_exit;
2780 mapping_set_error(inode->i_mapping, rc);
2785 if ((attrs->ia_valid & ATTR_MTIME) &&
2786 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) {
2787 rc = cifs_get_writable_file(cifsInode, FIND_WR_ANY, &wfile);
2789 tcon = tlink_tcon(wfile->tlink);
2790 rc = tcon->ses->server->ops->flush(xid, tcon, &wfile->fid);
2791 cifsFileInfo_put(wfile);
2793 goto cifs_setattr_exit;
2794 } else if (rc != -EBADF)
2795 goto cifs_setattr_exit;
2800 if (attrs->ia_valid & ATTR_SIZE) {
2801 rc = cifs_set_file_size(inode, attrs, xid, full_path);
2803 goto cifs_setattr_exit;
2806 if (attrs->ia_valid & ATTR_UID)
2807 uid = attrs->ia_uid;
2809 if (attrs->ia_valid & ATTR_GID)
2810 gid = attrs->ia_gid;
2812 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) ||
2813 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) {
2814 if (uid_valid(uid) || gid_valid(gid)) {
2815 rc = id_mode_to_cifs_acl(inode, full_path, NO_CHANGE_64,
2818 cifs_dbg(FYI, "%s: Setting id failed with error: %d\n",
2820 goto cifs_setattr_exit;
2824 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID))
2825 attrs->ia_valid &= ~(ATTR_UID | ATTR_GID);
2827 /* skip mode change if it's just for clearing setuid/setgid */
2828 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
2829 attrs->ia_valid &= ~ATTR_MODE;
2831 if (attrs->ia_valid & ATTR_MODE) {
2832 mode = attrs->ia_mode;
2834 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) ||
2835 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) {
2836 rc = id_mode_to_cifs_acl(inode, full_path, mode,
2837 INVALID_UID, INVALID_GID);
2839 cifs_dbg(FYI, "%s: Setting ACL failed with error: %d\n",
2841 goto cifs_setattr_exit;
2844 if (((mode & S_IWUGO) == 0) &&
2845 (cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
2847 dosattr = cifsInode->cifsAttrs | ATTR_READONLY;
2849 /* fix up mode if we're not using dynperm */
2850 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
2851 attrs->ia_mode = inode->i_mode & ~S_IWUGO;
2852 } else if ((mode & S_IWUGO) &&
2853 (cifsInode->cifsAttrs & ATTR_READONLY)) {
2855 dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
2856 /* Attributes of 0 are ignored */
2858 dosattr |= ATTR_NORMAL;
2860 /* reset local inode permissions to normal */
2861 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2862 attrs->ia_mode &= ~(S_IALLUGO);
2863 if (S_ISDIR(inode->i_mode))
2865 cifs_sb->mnt_dir_mode;
2868 cifs_sb->mnt_file_mode;
2870 } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2871 /* ignore mode change - ATTR_READONLY hasn't changed */
2872 attrs->ia_valid &= ~ATTR_MODE;
2876 if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) ||
2877 ((attrs->ia_valid & ATTR_MODE) && dosattr)) {
2878 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
2879 /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */
2881 /* Even if error on time set, no sense failing the call if
2882 the server would set the time to a reasonable value anyway,
2883 and this check ensures that we are not being called from
2884 sys_utimes in which case we ought to fail the call back to
2885 the user when the server rejects the call */
2886 if ((rc) && (attrs->ia_valid &
2887 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
2891 /* do not need local check to inode_check_ok since the server does
2894 goto cifs_setattr_exit;
2896 if ((attrs->ia_valid & ATTR_SIZE) &&
2897 attrs->ia_size != i_size_read(inode))
2898 truncate_setsize(inode, attrs->ia_size);
2900 setattr_copy(inode, attrs);
2901 mark_inode_dirty(inode);
2910 cifs_setattr(struct dentry *direntry, struct iattr *attrs)
2912 struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
2913 struct cifs_tcon *pTcon = cifs_sb_master_tcon(cifs_sb);
2914 int rc, retries = 0;
2917 if (pTcon->unix_ext)
2918 rc = cifs_setattr_unix(direntry, attrs);
2920 rc = cifs_setattr_nounix(direntry, attrs);
2922 } while (is_retryable_error(rc) && retries < 2);
2924 /* BB: add cifs_setattr_legacy for really old servers */
2929 void cifs_delete_inode(struct inode *inode)
2931 cifs_dbg(FYI, "In cifs_delete_inode, inode = 0x%p\n", inode);
2932 /* may have to add back in if and when safe distributed caching of
2933 directories added e.g. via FindNotify */