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"
40 #include "fs_context.h"
43 static void cifs_set_ops(struct inode *inode)
45 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
47 switch (inode->i_mode & S_IFMT) {
49 inode->i_op = &cifs_file_inode_ops;
50 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
51 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
52 inode->i_fop = &cifs_file_direct_nobrl_ops;
54 inode->i_fop = &cifs_file_direct_ops;
55 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) {
56 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
57 inode->i_fop = &cifs_file_strict_nobrl_ops;
59 inode->i_fop = &cifs_file_strict_ops;
60 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
61 inode->i_fop = &cifs_file_nobrl_ops;
62 else { /* not direct, send byte range locks */
63 inode->i_fop = &cifs_file_ops;
66 /* check if server can support readpages */
67 if (cifs_sb_master_tcon(cifs_sb)->ses->server->max_read <
68 PAGE_SIZE + MAX_CIFS_HDR_SIZE)
69 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
71 inode->i_data.a_ops = &cifs_addr_ops;
74 #ifdef CONFIG_CIFS_DFS_UPCALL
75 if (IS_AUTOMOUNT(inode)) {
76 inode->i_op = &cifs_dfs_referral_inode_operations;
78 #else /* NO DFS support, treat as a directory */
81 inode->i_op = &cifs_dir_inode_ops;
82 inode->i_fop = &cifs_dir_ops;
86 inode->i_op = &cifs_symlink_inode_ops;
89 init_special_inode(inode, inode->i_mode, inode->i_rdev);
94 /* check inode attributes against fattr. If they don't match, tag the
95 * inode for cache invalidation
98 cifs_revalidate_cache(struct inode *inode, struct cifs_fattr *fattr)
100 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
102 cifs_dbg(FYI, "%s: revalidating inode %llu\n",
103 __func__, cifs_i->uniqueid);
105 if (inode->i_state & I_NEW) {
106 cifs_dbg(FYI, "%s: inode %llu is new\n",
107 __func__, cifs_i->uniqueid);
111 /* don't bother with revalidation if we have an oplock */
112 if (CIFS_CACHE_READ(cifs_i)) {
113 cifs_dbg(FYI, "%s: inode %llu is oplocked\n",
114 __func__, cifs_i->uniqueid);
118 /* revalidate if mtime or size have changed */
119 fattr->cf_mtime = timestamp_truncate(fattr->cf_mtime, inode);
120 if (timespec64_equal(&inode->i_mtime, &fattr->cf_mtime) &&
121 cifs_i->server_eof == fattr->cf_eof) {
122 cifs_dbg(FYI, "%s: inode %llu is unchanged\n",
123 __func__, cifs_i->uniqueid);
127 cifs_dbg(FYI, "%s: invalidating inode %llu mapping\n",
128 __func__, cifs_i->uniqueid);
129 set_bit(CIFS_INO_INVALID_MAPPING, &cifs_i->flags);
133 * copy nlink to the inode, unless it wasn't provided. Provide
134 * sane values if we don't have an existing one and none was provided
137 cifs_nlink_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr)
140 * if we're in a situation where we can't trust what we
141 * got from the server (readdir, some non-unix cases)
142 * fake reasonable values
144 if (fattr->cf_flags & CIFS_FATTR_UNKNOWN_NLINK) {
145 /* only provide fake values on a new inode */
146 if (inode->i_state & I_NEW) {
147 if (fattr->cf_cifsattrs & ATTR_DIRECTORY)
155 /* we trust the server, so update it */
156 set_nlink(inode, fattr->cf_nlink);
159 /* populate an inode with info from a cifs_fattr struct */
161 cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr)
163 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
164 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
166 cifs_revalidate_cache(inode, fattr);
168 spin_lock(&inode->i_lock);
169 fattr->cf_mtime = timestamp_truncate(fattr->cf_mtime, inode);
170 fattr->cf_atime = timestamp_truncate(fattr->cf_atime, inode);
171 fattr->cf_ctime = timestamp_truncate(fattr->cf_ctime, inode);
172 /* we do not want atime to be less than mtime, it broke some apps */
173 if (timespec64_compare(&fattr->cf_atime, &fattr->cf_mtime) < 0)
174 inode->i_atime = fattr->cf_mtime;
176 inode->i_atime = fattr->cf_atime;
177 inode->i_mtime = fattr->cf_mtime;
178 inode->i_ctime = fattr->cf_ctime;
179 inode->i_rdev = fattr->cf_rdev;
180 cifs_nlink_fattr_to_inode(inode, fattr);
181 inode->i_uid = fattr->cf_uid;
182 inode->i_gid = fattr->cf_gid;
184 /* if dynperm is set, don't clobber existing mode */
185 if (inode->i_state & I_NEW ||
186 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM))
187 inode->i_mode = fattr->cf_mode;
189 cifs_i->cifsAttrs = fattr->cf_cifsattrs;
191 if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL)
194 cifs_i->time = jiffies;
196 if (fattr->cf_flags & CIFS_FATTR_DELETE_PENDING)
197 set_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags);
199 clear_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags);
201 cifs_i->server_eof = fattr->cf_eof;
203 * Can't safely change the file size here if the client is writing to
204 * it due to potential races.
206 if (is_size_safe_to_change(cifs_i, fattr->cf_eof)) {
207 i_size_write(inode, fattr->cf_eof);
210 * i_blocks is not related to (i_size / i_blksize),
211 * but instead 512 byte (2**9) size is required for
212 * calculating num blocks.
214 inode->i_blocks = (512 - 1 + fattr->cf_bytes) >> 9;
216 spin_unlock(&inode->i_lock);
218 if (fattr->cf_flags & CIFS_FATTR_DFS_REFERRAL)
219 inode->i_flags |= S_AUTOMOUNT;
220 if (inode->i_state & I_NEW)
225 cifs_fill_uniqueid(struct super_block *sb, struct cifs_fattr *fattr)
227 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
229 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
232 fattr->cf_uniqueid = iunique(sb, ROOT_I);
235 /* Fill a cifs_fattr struct with info from FILE_UNIX_BASIC_INFO. */
237 cifs_unix_basic_to_fattr(struct cifs_fattr *fattr, FILE_UNIX_BASIC_INFO *info,
238 struct cifs_sb_info *cifs_sb)
240 memset(fattr, 0, sizeof(*fattr));
241 fattr->cf_uniqueid = le64_to_cpu(info->UniqueId);
242 fattr->cf_bytes = le64_to_cpu(info->NumOfBytes);
243 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
245 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
246 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastModificationTime);
247 fattr->cf_ctime = cifs_NTtimeToUnix(info->LastStatusChange);
248 /* old POSIX extensions don't get create time */
250 fattr->cf_mode = le64_to_cpu(info->Permissions);
253 * Since we set the inode type below we need to mask off
254 * to avoid strange results if bits set above.
256 fattr->cf_mode &= ~S_IFMT;
257 switch (le32_to_cpu(info->Type)) {
259 fattr->cf_mode |= S_IFREG;
260 fattr->cf_dtype = DT_REG;
263 fattr->cf_mode |= S_IFLNK;
264 fattr->cf_dtype = DT_LNK;
267 fattr->cf_mode |= S_IFDIR;
268 fattr->cf_dtype = DT_DIR;
271 fattr->cf_mode |= S_IFCHR;
272 fattr->cf_dtype = DT_CHR;
273 fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor),
274 le64_to_cpu(info->DevMinor) & MINORMASK);
277 fattr->cf_mode |= S_IFBLK;
278 fattr->cf_dtype = DT_BLK;
279 fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor),
280 le64_to_cpu(info->DevMinor) & MINORMASK);
283 fattr->cf_mode |= S_IFIFO;
284 fattr->cf_dtype = DT_FIFO;
287 fattr->cf_mode |= S_IFSOCK;
288 fattr->cf_dtype = DT_SOCK;
291 /* safest to call it a file if we do not know */
292 fattr->cf_mode |= S_IFREG;
293 fattr->cf_dtype = DT_REG;
294 cifs_dbg(FYI, "unknown type %d\n", le32_to_cpu(info->Type));
298 fattr->cf_uid = cifs_sb->ctx->linux_uid;
299 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)) {
300 u64 id = le64_to_cpu(info->Uid);
301 if (id < ((uid_t)-1)) {
302 kuid_t uid = make_kuid(&init_user_ns, id);
308 fattr->cf_gid = cifs_sb->ctx->linux_gid;
309 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)) {
310 u64 id = le64_to_cpu(info->Gid);
311 if (id < ((gid_t)-1)) {
312 kgid_t gid = make_kgid(&init_user_ns, id);
318 fattr->cf_nlink = le64_to_cpu(info->Nlinks);
322 * Fill a cifs_fattr struct with fake inode info.
324 * Needed to setup cifs_fattr data for the directory which is the
325 * junction to the new submount (ie to setup the fake directory
326 * which represents a DFS referral).
329 cifs_create_dfs_fattr(struct cifs_fattr *fattr, struct super_block *sb)
331 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
333 cifs_dbg(FYI, "creating fake fattr for DFS referral\n");
335 memset(fattr, 0, sizeof(*fattr));
336 fattr->cf_mode = S_IFDIR | S_IXUGO | S_IRWXU;
337 fattr->cf_uid = cifs_sb->ctx->linux_uid;
338 fattr->cf_gid = cifs_sb->ctx->linux_gid;
339 ktime_get_coarse_real_ts64(&fattr->cf_mtime);
340 fattr->cf_atime = fattr->cf_ctime = fattr->cf_mtime;
342 fattr->cf_flags = CIFS_FATTR_DFS_REFERRAL;
346 cifs_get_file_info_unix(struct file *filp)
350 FILE_UNIX_BASIC_INFO find_data;
351 struct cifs_fattr fattr;
352 struct inode *inode = file_inode(filp);
353 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
354 struct cifsFileInfo *cfile = filp->private_data;
355 struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
358 rc = CIFSSMBUnixQFileInfo(xid, tcon, cfile->fid.netfid, &find_data);
360 cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb);
361 } else if (rc == -EREMOTE) {
362 cifs_create_dfs_fattr(&fattr, inode->i_sb);
366 cifs_fattr_to_inode(inode, &fattr);
371 int cifs_get_inode_info_unix(struct inode **pinode,
372 const unsigned char *full_path,
373 struct super_block *sb, unsigned int xid)
376 FILE_UNIX_BASIC_INFO find_data;
377 struct cifs_fattr fattr;
378 struct cifs_tcon *tcon;
379 struct tcon_link *tlink;
380 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
382 cifs_dbg(FYI, "Getting info on %s\n", full_path);
384 tlink = cifs_sb_tlink(cifs_sb);
386 return PTR_ERR(tlink);
387 tcon = tlink_tcon(tlink);
389 /* could have done a find first instead but this returns more info */
390 rc = CIFSSMBUnixQPathInfo(xid, tcon, full_path, &find_data,
391 cifs_sb->local_nls, cifs_remap(cifs_sb));
392 cifs_put_tlink(tlink);
395 cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb);
396 } else if (rc == -EREMOTE) {
397 cifs_create_dfs_fattr(&fattr, sb);
403 /* check for Minshall+French symlinks */
404 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
405 int tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr,
408 cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc);
411 if (*pinode == NULL) {
413 cifs_fill_uniqueid(sb, &fattr);
414 *pinode = cifs_iget(sb, &fattr);
418 /* we already have inode, update it */
420 /* if uniqueid is different, return error */
421 if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM &&
422 CIFS_I(*pinode)->uniqueid != fattr.cf_uniqueid)) {
423 CIFS_I(*pinode)->time = 0; /* force reval */
428 /* if filetype is different, return error */
429 if (unlikely(((*pinode)->i_mode & S_IFMT) !=
430 (fattr.cf_mode & S_IFMT))) {
431 CIFS_I(*pinode)->time = 0; /* force reval */
436 cifs_fattr_to_inode(*pinode, &fattr);
444 cifs_sfu_type(struct cifs_fattr *fattr, const char *path,
445 struct cifs_sb_info *cifs_sb, unsigned int xid)
449 struct tcon_link *tlink;
450 struct cifs_tcon *tcon;
452 struct cifs_open_parms oparms;
453 struct cifs_io_parms io_parms = {0};
455 unsigned int bytes_read;
457 int buf_type = CIFS_NO_BUFFER;
461 fattr->cf_mode &= ~S_IFMT;
463 if (fattr->cf_eof == 0) {
464 fattr->cf_mode |= S_IFIFO;
465 fattr->cf_dtype = DT_FIFO;
467 } else if (fattr->cf_eof < 8) {
468 fattr->cf_mode |= S_IFREG;
469 fattr->cf_dtype = DT_REG;
470 return -EINVAL; /* EOPNOTSUPP? */
473 tlink = cifs_sb_tlink(cifs_sb);
475 return PTR_ERR(tlink);
476 tcon = tlink_tcon(tlink);
479 oparms.cifs_sb = cifs_sb;
480 oparms.desired_access = GENERIC_READ;
481 oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR);
482 oparms.disposition = FILE_OPEN;
485 oparms.reconnect = false;
487 if (tcon->ses->server->oplocks)
491 rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, NULL);
493 cifs_dbg(FYI, "check sfu type of %s, open rc = %d\n", path, rc);
494 cifs_put_tlink(tlink);
499 io_parms.netfid = fid.netfid;
500 io_parms.pid = current->tgid;
501 io_parms.tcon = tcon;
503 io_parms.length = 24;
505 rc = tcon->ses->server->ops->sync_read(xid, &fid, &io_parms,
506 &bytes_read, &pbuf, &buf_type);
507 if ((rc == 0) && (bytes_read >= 8)) {
508 if (memcmp("IntxBLK", pbuf, 8) == 0) {
509 cifs_dbg(FYI, "Block device\n");
510 fattr->cf_mode |= S_IFBLK;
511 fattr->cf_dtype = DT_BLK;
512 if (bytes_read == 24) {
513 /* we have enough to decode dev num */
514 __u64 mjr; /* major */
515 __u64 mnr; /* minor */
516 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
517 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
518 fattr->cf_rdev = MKDEV(mjr, mnr);
520 } else if (memcmp("IntxCHR", pbuf, 8) == 0) {
521 cifs_dbg(FYI, "Char device\n");
522 fattr->cf_mode |= S_IFCHR;
523 fattr->cf_dtype = DT_CHR;
524 if (bytes_read == 24) {
525 /* we have enough to decode dev num */
526 __u64 mjr; /* major */
527 __u64 mnr; /* minor */
528 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
529 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
530 fattr->cf_rdev = MKDEV(mjr, mnr);
532 } else if (memcmp("IntxLNK", pbuf, 7) == 0) {
533 cifs_dbg(FYI, "Symlink\n");
534 fattr->cf_mode |= S_IFLNK;
535 fattr->cf_dtype = DT_LNK;
537 fattr->cf_mode |= S_IFREG; /* file? */
538 fattr->cf_dtype = DT_REG;
542 fattr->cf_mode |= S_IFREG; /* then it is a file */
543 fattr->cf_dtype = DT_REG;
544 rc = -EOPNOTSUPP; /* or some unknown SFU type */
547 tcon->ses->server->ops->close(xid, tcon, &fid);
548 cifs_put_tlink(tlink);
552 #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
555 * Fetch mode bits as provided by SFU.
557 * FIXME: Doesn't this clobber the type bit we got from cifs_sfu_type ?
559 static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path,
560 struct cifs_sb_info *cifs_sb, unsigned int xid)
562 #ifdef CONFIG_CIFS_XATTR
566 struct tcon_link *tlink;
567 struct cifs_tcon *tcon;
569 tlink = cifs_sb_tlink(cifs_sb);
571 return PTR_ERR(tlink);
572 tcon = tlink_tcon(tlink);
574 if (tcon->ses->server->ops->query_all_EAs == NULL) {
575 cifs_put_tlink(tlink);
579 rc = tcon->ses->server->ops->query_all_EAs(xid, tcon, path,
580 "SETFILEBITS", ea_value, 4 /* size of buf */,
582 cifs_put_tlink(tlink);
586 mode = le32_to_cpu(*((__le32 *)ea_value));
587 fattr->cf_mode &= ~SFBITS_MASK;
588 cifs_dbg(FYI, "special bits 0%o org mode 0%o\n",
589 mode, fattr->cf_mode);
590 fattr->cf_mode = (mode & SFBITS_MASK) | fattr->cf_mode;
591 cifs_dbg(FYI, "special mode bits 0%o\n", mode);
600 /* Fill a cifs_fattr struct with info from POSIX info struct */
602 smb311_posix_info_to_fattr(struct cifs_fattr *fattr, struct smb311_posix_qinfo *info,
603 struct super_block *sb, bool adjust_tz, bool symlink)
605 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
606 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
608 memset(fattr, 0, sizeof(*fattr));
610 /* no fattr->flags to set */
611 fattr->cf_cifsattrs = le32_to_cpu(info->DosAttributes);
612 fattr->cf_uniqueid = le64_to_cpu(info->Inode);
614 if (info->LastAccessTime)
615 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
617 ktime_get_coarse_real_ts64(&fattr->cf_atime);
619 fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime);
620 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);
623 fattr->cf_ctime.tv_sec += tcon->ses->server->timeAdj;
624 fattr->cf_mtime.tv_sec += tcon->ses->server->timeAdj;
627 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
628 fattr->cf_bytes = le64_to_cpu(info->AllocationSize);
629 fattr->cf_createtime = le64_to_cpu(info->CreationTime);
631 fattr->cf_nlink = le32_to_cpu(info->HardLinks);
632 fattr->cf_mode = (umode_t) le32_to_cpu(info->Mode);
633 /* The srv fs device id is overridden on network mount so setting rdev isn't needed here */
634 /* fattr->cf_rdev = le32_to_cpu(info->DeviceId); */
637 fattr->cf_mode |= S_IFLNK;
638 fattr->cf_dtype = DT_LNK;
639 } else if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
640 fattr->cf_mode |= S_IFDIR;
641 fattr->cf_dtype = DT_DIR;
643 fattr->cf_mode |= S_IFREG;
644 fattr->cf_dtype = DT_REG;
646 /* else if reparse point ... TODO: add support for FIFO and blk dev; special file types */
648 fattr->cf_uid = cifs_sb->ctx->linux_uid; /* TODO: map uid and gid from SID */
649 fattr->cf_gid = cifs_sb->ctx->linux_gid;
651 cifs_dbg(FYI, "POSIX query info: mode 0x%x uniqueid 0x%llx nlink %d\n",
652 fattr->cf_mode, fattr->cf_uniqueid, fattr->cf_nlink);
656 /* Fill a cifs_fattr struct with info from FILE_ALL_INFO */
658 cifs_all_info_to_fattr(struct cifs_fattr *fattr, FILE_ALL_INFO *info,
659 struct super_block *sb, bool adjust_tz,
660 bool symlink, u32 reparse_tag)
662 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
663 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
665 memset(fattr, 0, sizeof(*fattr));
666 fattr->cf_cifsattrs = le32_to_cpu(info->Attributes);
667 if (info->DeletePending)
668 fattr->cf_flags |= CIFS_FATTR_DELETE_PENDING;
670 if (info->LastAccessTime)
671 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
673 ktime_get_coarse_real_ts64(&fattr->cf_atime);
675 fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime);
676 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);
679 fattr->cf_ctime.tv_sec += tcon->ses->server->timeAdj;
680 fattr->cf_mtime.tv_sec += tcon->ses->server->timeAdj;
683 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
684 fattr->cf_bytes = le64_to_cpu(info->AllocationSize);
685 fattr->cf_createtime = le64_to_cpu(info->CreationTime);
687 fattr->cf_nlink = le32_to_cpu(info->NumberOfLinks);
688 if (reparse_tag == IO_REPARSE_TAG_LX_SYMLINK) {
689 fattr->cf_mode |= S_IFLNK | cifs_sb->ctx->file_mode;
690 fattr->cf_dtype = DT_LNK;
691 } else if (reparse_tag == IO_REPARSE_TAG_LX_FIFO) {
692 fattr->cf_mode |= S_IFIFO | cifs_sb->ctx->file_mode;
693 fattr->cf_dtype = DT_FIFO;
694 } else if (reparse_tag == IO_REPARSE_TAG_AF_UNIX) {
695 fattr->cf_mode |= S_IFSOCK | cifs_sb->ctx->file_mode;
696 fattr->cf_dtype = DT_SOCK;
697 } else if (reparse_tag == IO_REPARSE_TAG_LX_CHR) {
698 fattr->cf_mode |= S_IFCHR | cifs_sb->ctx->file_mode;
699 fattr->cf_dtype = DT_CHR;
700 } else if (reparse_tag == IO_REPARSE_TAG_LX_BLK) {
701 fattr->cf_mode |= S_IFBLK | cifs_sb->ctx->file_mode;
702 fattr->cf_dtype = DT_BLK;
703 } else if (symlink) { /* TODO add more reparse tag checks */
704 fattr->cf_mode = S_IFLNK;
705 fattr->cf_dtype = DT_LNK;
706 } else if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
707 fattr->cf_mode = S_IFDIR | cifs_sb->ctx->dir_mode;
708 fattr->cf_dtype = DT_DIR;
710 * Server can return wrong NumberOfLinks value for directories
711 * when Unix extensions are disabled - fake it.
714 fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK;
716 fattr->cf_mode = S_IFREG | cifs_sb->ctx->file_mode;
717 fattr->cf_dtype = DT_REG;
719 /* clear write bits if ATTR_READONLY is set */
720 if (fattr->cf_cifsattrs & ATTR_READONLY)
721 fattr->cf_mode &= ~(S_IWUGO);
724 * Don't accept zero nlink from non-unix servers unless
725 * delete is pending. Instead mark it as unknown.
727 if ((fattr->cf_nlink < 1) && !tcon->unix_ext &&
728 !info->DeletePending) {
729 cifs_dbg(VFS, "bogus file nlink value %u\n",
731 fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK;
735 fattr->cf_uid = cifs_sb->ctx->linux_uid;
736 fattr->cf_gid = cifs_sb->ctx->linux_gid;
740 cifs_get_file_info(struct file *filp)
744 FILE_ALL_INFO find_data;
745 struct cifs_fattr fattr;
746 struct inode *inode = file_inode(filp);
747 struct cifsFileInfo *cfile = filp->private_data;
748 struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
749 struct TCP_Server_Info *server = tcon->ses->server;
751 if (!server->ops->query_file_info)
755 rc = server->ops->query_file_info(xid, tcon, &cfile->fid, &find_data);
758 /* TODO: add support to query reparse tag */
759 cifs_all_info_to_fattr(&fattr, &find_data, inode->i_sb, false,
760 false, 0 /* no reparse tag */);
763 cifs_create_dfs_fattr(&fattr, inode->i_sb);
769 * FIXME: legacy server -- fall back to path-based call?
770 * for now, just skip revalidating and mark inode for
774 CIFS_I(inode)->time = 0;
781 * don't bother with SFU junk here -- just mark inode as needing
784 fattr.cf_uniqueid = CIFS_I(inode)->uniqueid;
785 fattr.cf_flags |= CIFS_FATTR_NEED_REVAL;
786 cifs_fattr_to_inode(inode, &fattr);
792 /* Simple function to return a 64 bit hash of string. Rarely called */
793 static __u64 simple_hashstr(const char *str)
795 const __u64 hash_mult = 1125899906842597ULL; /* a big enough prime */
799 hash = (hash + (__u64) *str++) * hash_mult;
805 * cifs_backup_query_path_info - SMB1 fallback code to get ino
807 * Fallback code to get file metadata when we don't have access to
808 * full_path (EACCES) and have backup creds.
810 * @xid: transaction id used to identify original request in logs
811 * @tcon: information about the server share we have mounted
812 * @sb: the superblock stores info such as disk space available
813 * @full_path: name of the file we are getting the metadata for
814 * @resp_buf: will be set to cifs resp buf and needs to be freed with
815 * cifs_buf_release() when done with @data
816 * @data: will be set to search info result buffer
819 cifs_backup_query_path_info(int xid,
820 struct cifs_tcon *tcon,
821 struct super_block *sb,
822 const char *full_path,
824 FILE_ALL_INFO **data)
826 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
827 struct cifs_search_info info = {0};
832 info.endOfSearch = false;
834 info.info_level = SMB_FIND_FILE_UNIX;
835 else if ((tcon->ses->capabilities &
836 tcon->ses->server->vals->cap_nt_find) == 0)
837 info.info_level = SMB_FIND_FILE_INFO_STANDARD;
838 else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
839 info.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
840 else /* no srvino useful for fallback to some netapp */
841 info.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
843 flags = CIFS_SEARCH_CLOSE_ALWAYS |
844 CIFS_SEARCH_CLOSE_AT_END |
845 CIFS_SEARCH_BACKUP_SEARCH;
847 rc = CIFSFindFirst(xid, tcon, full_path,
848 cifs_sb, NULL, flags, &info, false);
852 *resp_buf = (void *)info.ntwrk_buf_start;
853 *data = (FILE_ALL_INFO *)info.srch_entries_start;
858 cifs_set_fattr_ino(int xid,
859 struct cifs_tcon *tcon,
860 struct super_block *sb,
861 struct inode **inode,
862 const char *full_path,
864 struct cifs_fattr *fattr)
866 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
867 struct TCP_Server_Info *server = tcon->ses->server;
870 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
872 fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid;
874 fattr->cf_uniqueid = iunique(sb, ROOT_I);
879 * If we have an inode pass a NULL tcon to ensure we don't
880 * make a round trip to the server. This only works for SMB2+.
882 rc = server->ops->get_srv_inum(xid,
883 *inode ? NULL : tcon,
889 * If that fails reuse existing ino or generate one
890 * and disable server ones
893 fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid;
895 fattr->cf_uniqueid = iunique(sb, ROOT_I);
896 cifs_autodisable_serverino(cifs_sb);
901 /* If no errors, check for zero root inode (invalid) */
902 if (fattr->cf_uniqueid == 0 && strlen(full_path) == 0) {
903 cifs_dbg(FYI, "Invalid (0) inodenum\n");
906 fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid;
908 /* make an ino by hashing the UNC */
909 fattr->cf_flags |= CIFS_FATTR_FAKE_ROOT_INO;
910 fattr->cf_uniqueid = simple_hashstr(tcon->treeName);
915 static inline bool is_inode_cache_good(struct inode *ino)
917 return ino && CIFS_CACHE_READ(CIFS_I(ino)) && CIFS_I(ino)->time != 0;
921 cifs_get_inode_info(struct inode **inode,
922 const char *full_path,
923 FILE_ALL_INFO *in_data,
924 struct super_block *sb, int xid,
925 const struct cifs_fid *fid)
928 struct cifs_tcon *tcon;
929 struct TCP_Server_Info *server;
930 struct tcon_link *tlink;
931 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
932 bool adjust_tz = false;
933 struct cifs_fattr fattr = {0};
934 bool is_reparse_point = false;
935 FILE_ALL_INFO *data = in_data;
936 FILE_ALL_INFO *tmp_data = NULL;
937 void *smb1_backup_rsp_buf = NULL;
940 __u32 reparse_tag = 0;
942 tlink = cifs_sb_tlink(cifs_sb);
944 return PTR_ERR(tlink);
945 tcon = tlink_tcon(tlink);
946 server = tcon->ses->server;
949 * 1. Fetch file metadata if not provided (data)
953 if (is_inode_cache_good(*inode)) {
954 cifs_dbg(FYI, "No need to revalidate cached inode sizes\n");
957 tmp_data = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
962 rc = server->ops->query_path_info(xid, tcon, cifs_sb,
964 &adjust_tz, &is_reparse_point);
969 * 2. Convert it to internal cifs metadata (fattr)
975 * If the file is a reparse point, it is more complicated
976 * since we have to check if its reparse tag matches a known
977 * special file type e.g. symlink or fifo or char etc.
979 if ((le32_to_cpu(data->Attributes) & ATTR_REPARSE) &&
980 server->ops->query_reparse_tag) {
981 rc = server->ops->query_reparse_tag(xid, tcon, cifs_sb,
982 full_path, &reparse_tag);
983 cifs_dbg(FYI, "reparse tag 0x%x\n", reparse_tag);
985 cifs_all_info_to_fattr(&fattr, data, sb, adjust_tz,
986 is_reparse_point, reparse_tag);
989 /* DFS link, no metadata available on this server */
990 cifs_create_dfs_fattr(&fattr, sb);
995 * perm errors, try again with backup flags if possible
997 * For SMB2 and later the backup intent flag
998 * is already sent if needed on open and there
999 * is no path based FindFirst operation to use
1002 if (backup_cred(cifs_sb) && is_smb1_server(server)) {
1003 /* for easier reading */
1004 FILE_DIRECTORY_INFO *fdi;
1005 SEARCH_ID_FULL_DIR_INFO *si;
1007 rc = cifs_backup_query_path_info(xid, tcon, sb,
1009 &smb1_backup_rsp_buf,
1014 fdi = (FILE_DIRECTORY_INFO *)data;
1015 si = (SEARCH_ID_FULL_DIR_INFO *)data;
1017 cifs_dir_info_to_fattr(&fattr, fdi, cifs_sb);
1018 fattr.cf_uniqueid = le64_to_cpu(si->UniqueId);
1019 /* uniqueid set, skip get inum step */
1020 goto handle_mnt_opt;
1022 /* nothing we can do, bail out */
1027 cifs_dbg(FYI, "%s: unhandled err rc %d\n", __func__, rc);
1032 * 3. Get or update inode number (fattr.cf_uniqueid)
1035 cifs_set_fattr_ino(xid, tcon, sb, inode, full_path, data, &fattr);
1038 * 4. Tweak fattr based on mount options
1042 /* query for SFU type info if supported and needed */
1043 if (fattr.cf_cifsattrs & ATTR_SYSTEM &&
1044 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
1045 tmprc = cifs_sfu_type(&fattr, full_path, cifs_sb, xid);
1047 cifs_dbg(FYI, "cifs_sfu_type failed: %d\n", tmprc);
1050 /* fill in 0777 bits from ACL */
1051 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID) {
1052 rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, true,
1057 cifs_dbg(FYI, "%s: Get mode from SID failed. rc=%d\n",
1061 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
1062 rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, false,
1067 cifs_dbg(FYI, "%s: Getting ACL failed with error: %d\n",
1073 /* fill in remaining high mode bits e.g. SUID, VTX */
1074 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
1075 cifs_sfu_mode(&fattr, full_path, cifs_sb, xid);
1077 /* check for Minshall+French symlinks */
1078 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
1079 tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr,
1082 cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc);
1086 * 5. Update inode with final fattr data
1090 *inode = cifs_iget(sb, &fattr);
1094 /* we already have inode, update it */
1096 /* if uniqueid is different, return error */
1097 if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM &&
1098 CIFS_I(*inode)->uniqueid != fattr.cf_uniqueid)) {
1099 CIFS_I(*inode)->time = 0; /* force reval */
1104 /* if filetype is different, return error */
1105 if (unlikely(((*inode)->i_mode & S_IFMT) !=
1106 (fattr.cf_mode & S_IFMT))) {
1107 CIFS_I(*inode)->time = 0; /* force reval */
1112 cifs_fattr_to_inode(*inode, &fattr);
1115 cifs_buf_release(smb1_backup_rsp_buf);
1116 cifs_put_tlink(tlink);
1122 smb311_posix_get_inode_info(struct inode **inode,
1123 const char *full_path,
1124 struct super_block *sb, unsigned int xid)
1126 struct cifs_tcon *tcon;
1127 struct tcon_link *tlink;
1128 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1129 bool adjust_tz = false;
1130 struct cifs_fattr fattr = {0};
1131 bool symlink = false;
1132 struct smb311_posix_qinfo *data = NULL;
1136 tlink = cifs_sb_tlink(cifs_sb);
1138 return PTR_ERR(tlink);
1139 tcon = tlink_tcon(tlink);
1142 * 1. Fetch file metadata
1145 if (is_inode_cache_good(*inode)) {
1146 cifs_dbg(FYI, "No need to revalidate cached inode sizes\n");
1149 data = kmalloc(sizeof(struct smb311_posix_qinfo), GFP_KERNEL);
1155 rc = smb311_posix_query_path_info(xid, tcon, cifs_sb,
1157 &adjust_tz, &symlink);
1160 * 2. Convert it to internal cifs metadata (fattr)
1165 smb311_posix_info_to_fattr(&fattr, data, sb, adjust_tz, symlink);
1168 /* DFS link, no metadata available on this server */
1169 cifs_create_dfs_fattr(&fattr, sb);
1174 * For SMB2 and later the backup intent flag
1175 * is already sent if needed on open and there
1176 * is no path based FindFirst operation to use
1177 * to retry with so nothing we can do, bail out
1181 cifs_dbg(FYI, "%s: unhandled err rc %d\n", __func__, rc);
1187 * 3. Tweak fattr based on mount options
1190 /* check for Minshall+French symlinks */
1191 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
1192 tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr,
1195 cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc);
1199 * 4. Update inode with final fattr data
1203 *inode = cifs_iget(sb, &fattr);
1207 /* we already have inode, update it */
1209 /* if uniqueid is different, return error */
1210 if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM &&
1211 CIFS_I(*inode)->uniqueid != fattr.cf_uniqueid)) {
1212 CIFS_I(*inode)->time = 0; /* force reval */
1217 /* if filetype is different, return error */
1218 if (unlikely(((*inode)->i_mode & S_IFMT) !=
1219 (fattr.cf_mode & S_IFMT))) {
1220 CIFS_I(*inode)->time = 0; /* force reval */
1225 cifs_fattr_to_inode(*inode, &fattr);
1228 cifs_put_tlink(tlink);
1234 static const struct inode_operations cifs_ipc_inode_ops = {
1235 .lookup = cifs_lookup,
1239 cifs_find_inode(struct inode *inode, void *opaque)
1241 struct cifs_fattr *fattr = (struct cifs_fattr *) opaque;
1243 /* don't match inode with different uniqueid */
1244 if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid)
1247 /* use createtime like an i_generation field */
1248 if (CIFS_I(inode)->createtime != fattr->cf_createtime)
1251 /* don't match inode of different type */
1252 if ((inode->i_mode & S_IFMT) != (fattr->cf_mode & S_IFMT))
1255 /* if it's not a directory or has no dentries, then flag it */
1256 if (S_ISDIR(inode->i_mode) && !hlist_empty(&inode->i_dentry))
1257 fattr->cf_flags |= CIFS_FATTR_INO_COLLISION;
1263 cifs_init_inode(struct inode *inode, void *opaque)
1265 struct cifs_fattr *fattr = (struct cifs_fattr *) opaque;
1267 CIFS_I(inode)->uniqueid = fattr->cf_uniqueid;
1268 CIFS_I(inode)->createtime = fattr->cf_createtime;
1273 * walk dentry list for an inode and report whether it has aliases that
1274 * are hashed. We use this to determine if a directory inode can actually
1278 inode_has_hashed_dentries(struct inode *inode)
1280 struct dentry *dentry;
1282 spin_lock(&inode->i_lock);
1283 hlist_for_each_entry(dentry, &inode->i_dentry, d_u.d_alias) {
1284 if (!d_unhashed(dentry) || IS_ROOT(dentry)) {
1285 spin_unlock(&inode->i_lock);
1289 spin_unlock(&inode->i_lock);
1293 /* Given fattrs, get a corresponding inode */
1295 cifs_iget(struct super_block *sb, struct cifs_fattr *fattr)
1298 struct inode *inode;
1301 cifs_dbg(FYI, "looking for uniqueid=%llu\n", fattr->cf_uniqueid);
1303 /* hash down to 32-bits on 32-bit arch */
1304 hash = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid);
1306 inode = iget5_locked(sb, hash, cifs_find_inode, cifs_init_inode, fattr);
1308 /* was there a potentially problematic inode collision? */
1309 if (fattr->cf_flags & CIFS_FATTR_INO_COLLISION) {
1310 fattr->cf_flags &= ~CIFS_FATTR_INO_COLLISION;
1312 if (inode_has_hashed_dentries(inode)) {
1313 cifs_autodisable_serverino(CIFS_SB(sb));
1315 fattr->cf_uniqueid = iunique(sb, ROOT_I);
1316 goto retry_iget5_locked;
1320 cifs_fattr_to_inode(inode, fattr);
1321 if (sb->s_flags & SB_NOATIME)
1322 inode->i_flags |= S_NOATIME | S_NOCMTIME;
1323 if (inode->i_state & I_NEW) {
1324 inode->i_ino = hash;
1325 #ifdef CONFIG_CIFS_FSCACHE
1326 /* initialize per-inode cache cookie pointer */
1327 CIFS_I(inode)->fscache = NULL;
1329 unlock_new_inode(inode);
1336 /* gets root inode */
1337 struct inode *cifs_root_iget(struct super_block *sb)
1340 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1341 struct inode *inode = NULL;
1343 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
1347 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH)
1348 && cifs_sb->prepath) {
1349 len = strlen(cifs_sb->prepath);
1350 path = kzalloc(len + 2 /* leading sep + null */, GFP_KERNEL);
1352 return ERR_PTR(-ENOMEM);
1354 memcpy(path+1, cifs_sb->prepath, len);
1356 path = kstrdup("", GFP_KERNEL);
1358 return ERR_PTR(-ENOMEM);
1362 if (tcon->unix_ext) {
1363 rc = cifs_get_inode_info_unix(&inode, path, sb, xid);
1364 /* some servers mistakenly claim POSIX support */
1365 if (rc != -EOPNOTSUPP)
1367 cifs_dbg(VFS, "server does not support POSIX extensions\n");
1368 tcon->unix_ext = false;
1371 convert_delimiter(path, CIFS_DIR_SEP(cifs_sb));
1372 if (tcon->posix_extensions)
1373 rc = smb311_posix_get_inode_info(&inode, path, sb, xid);
1375 rc = cifs_get_inode_info(&inode, path, NULL, sb, xid, NULL);
1379 inode = ERR_PTR(rc);
1383 #ifdef CONFIG_CIFS_FSCACHE
1384 /* populate tcon->resource_id */
1385 tcon->resource_id = CIFS_I(inode)->uniqueid;
1388 if (rc && tcon->pipe) {
1389 cifs_dbg(FYI, "ipc connection - fake read inode\n");
1390 spin_lock(&inode->i_lock);
1391 inode->i_mode |= S_IFDIR;
1392 set_nlink(inode, 2);
1393 inode->i_op = &cifs_ipc_inode_ops;
1394 inode->i_fop = &simple_dir_operations;
1395 inode->i_uid = cifs_sb->ctx->linux_uid;
1396 inode->i_gid = cifs_sb->ctx->linux_gid;
1397 spin_unlock(&inode->i_lock);
1400 inode = ERR_PTR(rc);
1410 cifs_set_file_info(struct inode *inode, struct iattr *attrs, unsigned int xid,
1411 const char *full_path, __u32 dosattr)
1413 bool set_time = false;
1414 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1415 struct TCP_Server_Info *server;
1416 FILE_BASIC_INFO info_buf;
1421 server = cifs_sb_master_tcon(cifs_sb)->ses->server;
1422 if (!server->ops->set_file_info)
1427 if (attrs->ia_valid & ATTR_ATIME) {
1429 info_buf.LastAccessTime =
1430 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1432 info_buf.LastAccessTime = 0;
1434 if (attrs->ia_valid & ATTR_MTIME) {
1436 info_buf.LastWriteTime =
1437 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1439 info_buf.LastWriteTime = 0;
1442 * Samba throws this field away, but windows may actually use it.
1443 * Do not set ctime unless other time stamps are changed explicitly
1444 * (i.e. by utimes()) since we would then have a mix of client and
1447 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1448 cifs_dbg(FYI, "CIFS - CTIME changed\n");
1449 info_buf.ChangeTime =
1450 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1452 info_buf.ChangeTime = 0;
1454 info_buf.CreationTime = 0; /* don't change */
1455 info_buf.Attributes = cpu_to_le32(dosattr);
1457 return server->ops->set_file_info(inode, full_path, &info_buf, xid);
1461 * Open the given file (if it isn't already), set the DELETE_ON_CLOSE bit
1462 * and rename it to a random name that hopefully won't conflict with
1466 cifs_rename_pending_delete(const char *full_path, struct dentry *dentry,
1467 const unsigned int xid)
1471 struct cifs_fid fid;
1472 struct cifs_open_parms oparms;
1473 struct inode *inode = d_inode(dentry);
1474 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1475 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1476 struct tcon_link *tlink;
1477 struct cifs_tcon *tcon;
1478 __u32 dosattr, origattr;
1479 FILE_BASIC_INFO *info_buf = NULL;
1481 tlink = cifs_sb_tlink(cifs_sb);
1483 return PTR_ERR(tlink);
1484 tcon = tlink_tcon(tlink);
1487 * We cannot rename the file if the server doesn't support
1488 * CAP_INFOLEVEL_PASSTHRU
1490 if (!(tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)) {
1496 oparms.cifs_sb = cifs_sb;
1497 oparms.desired_access = DELETE | FILE_WRITE_ATTRIBUTES;
1498 oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR);
1499 oparms.disposition = FILE_OPEN;
1500 oparms.path = full_path;
1502 oparms.reconnect = false;
1504 rc = CIFS_open(xid, &oparms, &oplock, NULL);
1508 origattr = cifsInode->cifsAttrs;
1510 origattr |= ATTR_NORMAL;
1512 dosattr = origattr & ~ATTR_READONLY;
1514 dosattr |= ATTR_NORMAL;
1515 dosattr |= ATTR_HIDDEN;
1517 /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */
1518 if (dosattr != origattr) {
1519 info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL);
1520 if (info_buf == NULL) {
1524 info_buf->Attributes = cpu_to_le32(dosattr);
1525 rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid,
1527 /* although we would like to mark the file hidden
1528 if that fails we will still try to rename it */
1530 cifsInode->cifsAttrs = dosattr;
1532 dosattr = origattr; /* since not able to change them */
1535 /* rename the file */
1536 rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, NULL,
1538 cifs_remap(cifs_sb));
1544 /* try to set DELETE_ON_CLOSE */
1545 if (!test_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags)) {
1546 rc = CIFSSMBSetFileDisposition(xid, tcon, true, fid.netfid,
1549 * some samba versions return -ENOENT when we try to set the
1550 * file disposition here. Likely a samba bug, but work around
1551 * it for now. This means that some cifsXXX files may hang
1552 * around after they shouldn't.
1554 * BB: remove this hack after more servers have the fix
1562 set_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags);
1566 CIFSSMBClose(xid, tcon, fid.netfid);
1569 cifs_put_tlink(tlink);
1573 * reset everything back to the original state. Don't bother
1574 * dealing with errors here since we can't do anything about
1578 CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, dentry->d_name.name,
1579 cifs_sb->local_nls, cifs_remap(cifs_sb));
1581 if (dosattr != origattr) {
1582 info_buf->Attributes = cpu_to_le32(origattr);
1583 if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid,
1585 cifsInode->cifsAttrs = origattr;
1591 /* copied from fs/nfs/dir.c with small changes */
1593 cifs_drop_nlink(struct inode *inode)
1595 spin_lock(&inode->i_lock);
1596 if (inode->i_nlink > 0)
1598 spin_unlock(&inode->i_lock);
1602 * If d_inode(dentry) is null (usually meaning the cached dentry
1603 * is a negative dentry) then we would attempt a standard SMB delete, but
1604 * if that fails we can not attempt the fall back mechanisms on EACCES
1605 * but will return the EACCES to the caller. Note that the VFS does not call
1606 * unlink on negative dentries currently.
1608 int cifs_unlink(struct inode *dir, struct dentry *dentry)
1612 const char *full_path;
1614 struct inode *inode = d_inode(dentry);
1615 struct cifsInodeInfo *cifs_inode;
1616 struct super_block *sb = dir->i_sb;
1617 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1618 struct tcon_link *tlink;
1619 struct cifs_tcon *tcon;
1620 struct TCP_Server_Info *server;
1621 struct iattr *attrs = NULL;
1622 __u32 dosattr = 0, origattr = 0;
1624 cifs_dbg(FYI, "cifs_unlink, dir=0x%p, dentry=0x%p\n", dir, dentry);
1626 tlink = cifs_sb_tlink(cifs_sb);
1628 return PTR_ERR(tlink);
1629 tcon = tlink_tcon(tlink);
1630 server = tcon->ses->server;
1633 page = alloc_dentry_path();
1635 if (tcon->nodelete) {
1640 /* Unlink can be called from rename so we can not take the
1641 * sb->s_vfs_rename_mutex here */
1642 full_path = build_path_from_dentry(dentry, page);
1643 if (IS_ERR(full_path)) {
1644 rc = PTR_ERR(full_path);
1648 if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1649 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1650 rc = CIFSPOSIXDelFile(xid, tcon, full_path,
1651 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
1652 cifs_remap(cifs_sb));
1653 cifs_dbg(FYI, "posix del rc %d\n", rc);
1654 if ((rc == 0) || (rc == -ENOENT))
1655 goto psx_del_no_retry;
1659 if (!server->ops->unlink) {
1661 goto psx_del_no_retry;
1664 rc = server->ops->unlink(xid, tcon, full_path, cifs_sb);
1669 cifs_drop_nlink(inode);
1670 } else if (rc == -ENOENT) {
1672 } else if (rc == -EBUSY) {
1673 if (server->ops->rename_pending_delete) {
1674 rc = server->ops->rename_pending_delete(full_path,
1677 cifs_drop_nlink(inode);
1679 } else if ((rc == -EACCES) && (dosattr == 0) && inode) {
1680 attrs = kzalloc(sizeof(*attrs), GFP_KERNEL);
1681 if (attrs == NULL) {
1686 /* try to reset dos attributes */
1687 cifs_inode = CIFS_I(inode);
1688 origattr = cifs_inode->cifsAttrs;
1690 origattr |= ATTR_NORMAL;
1691 dosattr = origattr & ~ATTR_READONLY;
1693 dosattr |= ATTR_NORMAL;
1694 dosattr |= ATTR_HIDDEN;
1696 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
1700 goto retry_std_delete;
1703 /* undo the setattr if we errored out and it's needed */
1704 if (rc != 0 && dosattr != 0)
1705 cifs_set_file_info(inode, attrs, xid, full_path, origattr);
1709 cifs_inode = CIFS_I(inode);
1710 cifs_inode->time = 0; /* will force revalidate to get info
1712 inode->i_ctime = current_time(inode);
1714 dir->i_ctime = dir->i_mtime = current_time(dir);
1715 cifs_inode = CIFS_I(dir);
1716 CIFS_I(dir)->time = 0; /* force revalidate of dir as well */
1718 free_dentry_path(page);
1721 cifs_put_tlink(tlink);
1726 cifs_mkdir_qinfo(struct inode *parent, struct dentry *dentry, umode_t mode,
1727 const char *full_path, struct cifs_sb_info *cifs_sb,
1728 struct cifs_tcon *tcon, const unsigned int xid)
1731 struct inode *inode = NULL;
1733 if (tcon->posix_extensions)
1734 rc = smb311_posix_get_inode_info(&inode, full_path, parent->i_sb, xid);
1735 else if (tcon->unix_ext)
1736 rc = cifs_get_inode_info_unix(&inode, full_path, parent->i_sb,
1739 rc = cifs_get_inode_info(&inode, full_path, NULL, parent->i_sb,
1746 * setting nlink not necessary except in cases where we failed to get it
1747 * from the server or was set bogus. Also, since this is a brand new
1748 * inode, no need to grab the i_lock before setting the i_nlink.
1750 if (inode->i_nlink < 2)
1751 set_nlink(inode, 2);
1752 mode &= ~current_umask();
1753 /* must turn on setgid bit if parent dir has it */
1754 if (parent->i_mode & S_ISGID)
1757 if (tcon->unix_ext) {
1758 struct cifs_unix_set_info_args args = {
1760 .ctime = NO_CHANGE_64,
1761 .atime = NO_CHANGE_64,
1762 .mtime = NO_CHANGE_64,
1765 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1766 args.uid = current_fsuid();
1767 if (parent->i_mode & S_ISGID)
1768 args.gid = parent->i_gid;
1770 args.gid = current_fsgid();
1772 args.uid = INVALID_UID; /* no change */
1773 args.gid = INVALID_GID; /* no change */
1775 CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args,
1777 cifs_remap(cifs_sb));
1779 struct TCP_Server_Info *server = tcon->ses->server;
1780 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
1781 (mode & S_IWUGO) == 0 && server->ops->mkdir_setinfo)
1782 server->ops->mkdir_setinfo(inode, full_path, cifs_sb,
1784 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
1785 inode->i_mode = (mode | S_IFDIR);
1787 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1788 inode->i_uid = current_fsuid();
1789 if (inode->i_mode & S_ISGID)
1790 inode->i_gid = parent->i_gid;
1792 inode->i_gid = current_fsgid();
1795 d_instantiate(dentry, inode);
1800 cifs_posix_mkdir(struct inode *inode, struct dentry *dentry, umode_t mode,
1801 const char *full_path, struct cifs_sb_info *cifs_sb,
1802 struct cifs_tcon *tcon, const unsigned int xid)
1806 FILE_UNIX_BASIC_INFO *info = NULL;
1807 struct inode *newinode = NULL;
1808 struct cifs_fattr fattr;
1810 info = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1813 goto posix_mkdir_out;
1816 mode &= ~current_umask();
1817 rc = CIFSPOSIXCreate(xid, tcon, SMB_O_DIRECTORY | SMB_O_CREAT, mode,
1818 NULL /* netfid */, info, &oplock, full_path,
1819 cifs_sb->local_nls, cifs_remap(cifs_sb));
1820 if (rc == -EOPNOTSUPP)
1821 goto posix_mkdir_out;
1823 cifs_dbg(FYI, "posix mkdir returned 0x%x\n", rc);
1825 goto posix_mkdir_out;
1828 if (info->Type == cpu_to_le32(-1))
1829 /* no return info, go query for it */
1830 goto posix_mkdir_get_info;
1832 * BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if
1833 * need to set uid/gid.
1836 cifs_unix_basic_to_fattr(&fattr, info, cifs_sb);
1837 cifs_fill_uniqueid(inode->i_sb, &fattr);
1838 newinode = cifs_iget(inode->i_sb, &fattr);
1840 goto posix_mkdir_get_info;
1842 d_instantiate(dentry, newinode);
1844 #ifdef CONFIG_CIFS_DEBUG2
1845 cifs_dbg(FYI, "instantiated dentry %p %pd to inode %p\n",
1846 dentry, dentry, newinode);
1848 if (newinode->i_nlink != 2)
1849 cifs_dbg(FYI, "unexpected number of links %d\n",
1856 posix_mkdir_get_info:
1857 rc = cifs_mkdir_qinfo(inode, dentry, mode, full_path, cifs_sb, tcon,
1859 goto posix_mkdir_out;
1862 int cifs_mkdir(struct user_namespace *mnt_userns, struct inode *inode,
1863 struct dentry *direntry, umode_t mode)
1867 struct cifs_sb_info *cifs_sb;
1868 struct tcon_link *tlink;
1869 struct cifs_tcon *tcon;
1870 struct TCP_Server_Info *server;
1871 const char *full_path;
1874 cifs_dbg(FYI, "In cifs_mkdir, mode = %04ho inode = 0x%p\n",
1877 cifs_sb = CIFS_SB(inode->i_sb);
1878 tlink = cifs_sb_tlink(cifs_sb);
1880 return PTR_ERR(tlink);
1881 tcon = tlink_tcon(tlink);
1885 page = alloc_dentry_path();
1886 full_path = build_path_from_dentry(direntry, page);
1887 if (IS_ERR(full_path)) {
1888 rc = PTR_ERR(full_path);
1892 server = tcon->ses->server;
1894 if ((server->ops->posix_mkdir) && (tcon->posix_extensions)) {
1895 rc = server->ops->posix_mkdir(xid, inode, mode, tcon, full_path,
1897 d_drop(direntry); /* for time being always refresh inode info */
1901 if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1902 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1903 rc = cifs_posix_mkdir(inode, direntry, mode, full_path, cifs_sb,
1905 if (rc != -EOPNOTSUPP)
1909 if (!server->ops->mkdir) {
1914 /* BB add setting the equivalent of mode via CreateX w/ACLs */
1915 rc = server->ops->mkdir(xid, inode, mode, tcon, full_path, cifs_sb);
1917 cifs_dbg(FYI, "cifs_mkdir returned 0x%x\n", rc);
1922 /* TODO: skip this for smb2/smb3 */
1923 rc = cifs_mkdir_qinfo(inode, direntry, mode, full_path, cifs_sb, tcon,
1927 * Force revalidate to get parent dir info when needed since cached
1928 * attributes are invalid now.
1930 CIFS_I(inode)->time = 0;
1931 free_dentry_path(page);
1933 cifs_put_tlink(tlink);
1937 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1941 struct cifs_sb_info *cifs_sb;
1942 struct tcon_link *tlink;
1943 struct cifs_tcon *tcon;
1944 struct TCP_Server_Info *server;
1945 const char *full_path;
1946 void *page = alloc_dentry_path();
1947 struct cifsInodeInfo *cifsInode;
1949 cifs_dbg(FYI, "cifs_rmdir, inode = 0x%p\n", inode);
1953 full_path = build_path_from_dentry(direntry, page);
1954 if (IS_ERR(full_path)) {
1955 rc = PTR_ERR(full_path);
1959 cifs_sb = CIFS_SB(inode->i_sb);
1960 tlink = cifs_sb_tlink(cifs_sb);
1961 if (IS_ERR(tlink)) {
1962 rc = PTR_ERR(tlink);
1965 tcon = tlink_tcon(tlink);
1966 server = tcon->ses->server;
1968 if (!server->ops->rmdir) {
1970 cifs_put_tlink(tlink);
1974 if (tcon->nodelete) {
1976 cifs_put_tlink(tlink);
1980 rc = server->ops->rmdir(xid, tcon, full_path, cifs_sb);
1981 cifs_put_tlink(tlink);
1984 spin_lock(&d_inode(direntry)->i_lock);
1985 i_size_write(d_inode(direntry), 0);
1986 clear_nlink(d_inode(direntry));
1987 spin_unlock(&d_inode(direntry)->i_lock);
1990 cifsInode = CIFS_I(d_inode(direntry));
1991 /* force revalidate to go get info when needed */
1992 cifsInode->time = 0;
1994 cifsInode = CIFS_I(inode);
1996 * Force revalidate to get parent dir info when needed since cached
1997 * attributes are invalid now.
1999 cifsInode->time = 0;
2001 d_inode(direntry)->i_ctime = inode->i_ctime = inode->i_mtime =
2002 current_time(inode);
2005 free_dentry_path(page);
2011 cifs_do_rename(const unsigned int xid, struct dentry *from_dentry,
2012 const char *from_path, struct dentry *to_dentry,
2013 const char *to_path)
2015 struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb);
2016 struct tcon_link *tlink;
2017 struct cifs_tcon *tcon;
2018 struct TCP_Server_Info *server;
2019 struct cifs_fid fid;
2020 struct cifs_open_parms oparms;
2023 tlink = cifs_sb_tlink(cifs_sb);
2025 return PTR_ERR(tlink);
2026 tcon = tlink_tcon(tlink);
2027 server = tcon->ses->server;
2029 if (!server->ops->rename)
2032 /* try path-based rename first */
2033 rc = server->ops->rename(xid, tcon, from_path, to_path, cifs_sb);
2036 * Don't bother with rename by filehandle unless file is busy and
2037 * source. Note that cross directory moves do not work with
2038 * rename by filehandle to various Windows servers.
2040 if (rc == 0 || rc != -EBUSY)
2041 goto do_rename_exit;
2043 /* Don't fall back to using SMB on SMB 2+ mount */
2044 if (server->vals->protocol_id != 0)
2045 goto do_rename_exit;
2047 /* open-file renames don't work across directories */
2048 if (to_dentry->d_parent != from_dentry->d_parent)
2049 goto do_rename_exit;
2052 oparms.cifs_sb = cifs_sb;
2053 /* open the file to be renamed -- we need DELETE perms */
2054 oparms.desired_access = DELETE;
2055 oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR);
2056 oparms.disposition = FILE_OPEN;
2057 oparms.path = from_path;
2059 oparms.reconnect = false;
2061 rc = CIFS_open(xid, &oparms, &oplock, NULL);
2063 rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid,
2064 (const char *) to_dentry->d_name.name,
2065 cifs_sb->local_nls, cifs_remap(cifs_sb));
2066 CIFSSMBClose(xid, tcon, fid.netfid);
2070 d_move(from_dentry, to_dentry);
2071 cifs_put_tlink(tlink);
2076 cifs_rename2(struct user_namespace *mnt_userns, struct inode *source_dir,
2077 struct dentry *source_dentry, struct inode *target_dir,
2078 struct dentry *target_dentry, unsigned int flags)
2080 const char *from_name, *to_name;
2081 void *page1, *page2;
2082 struct cifs_sb_info *cifs_sb;
2083 struct tcon_link *tlink;
2084 struct cifs_tcon *tcon;
2085 FILE_UNIX_BASIC_INFO *info_buf_source = NULL;
2086 FILE_UNIX_BASIC_INFO *info_buf_target;
2090 if (flags & ~RENAME_NOREPLACE)
2093 cifs_sb = CIFS_SB(source_dir->i_sb);
2094 tlink = cifs_sb_tlink(cifs_sb);
2096 return PTR_ERR(tlink);
2097 tcon = tlink_tcon(tlink);
2099 page1 = alloc_dentry_path();
2100 page2 = alloc_dentry_path();
2103 from_name = build_path_from_dentry(source_dentry, page1);
2104 if (IS_ERR(from_name)) {
2105 rc = PTR_ERR(from_name);
2106 goto cifs_rename_exit;
2109 to_name = build_path_from_dentry(target_dentry, page2);
2110 if (IS_ERR(to_name)) {
2111 rc = PTR_ERR(to_name);
2112 goto cifs_rename_exit;
2115 rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry,
2119 * No-replace is the natural behavior for CIFS, so skip unlink hacks.
2121 if (flags & RENAME_NOREPLACE)
2122 goto cifs_rename_exit;
2124 if (rc == -EEXIST && tcon->unix_ext) {
2126 * Are src and dst hardlinks of same inode? We can only tell
2127 * with unix extensions enabled.
2130 kmalloc_array(2, sizeof(FILE_UNIX_BASIC_INFO),
2132 if (info_buf_source == NULL) {
2134 goto cifs_rename_exit;
2137 info_buf_target = info_buf_source + 1;
2138 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, from_name,
2141 cifs_remap(cifs_sb));
2145 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, to_name,
2148 cifs_remap(cifs_sb));
2150 if (tmprc == 0 && (info_buf_source->UniqueId ==
2151 info_buf_target->UniqueId)) {
2152 /* same file, POSIX says that this is a noop */
2154 goto cifs_rename_exit;
2158 * else ... BB we could add the same check for Windows by
2159 * checking the UniqueId via FILE_INTERNAL_INFO
2163 /* Try unlinking the target dentry if it's not negative */
2164 if (d_really_is_positive(target_dentry) && (rc == -EACCES || rc == -EEXIST)) {
2165 if (d_is_dir(target_dentry))
2166 tmprc = cifs_rmdir(target_dir, target_dentry);
2168 tmprc = cifs_unlink(target_dir, target_dentry);
2170 goto cifs_rename_exit;
2171 rc = cifs_do_rename(xid, source_dentry, from_name,
2172 target_dentry, to_name);
2175 /* force revalidate to go get info when needed */
2176 CIFS_I(source_dir)->time = CIFS_I(target_dir)->time = 0;
2178 source_dir->i_ctime = source_dir->i_mtime = target_dir->i_ctime =
2179 target_dir->i_mtime = current_time(source_dir);
2182 kfree(info_buf_source);
2183 free_dentry_path(page2);
2184 free_dentry_path(page1);
2186 cifs_put_tlink(tlink);
2191 cifs_dentry_needs_reval(struct dentry *dentry)
2193 struct inode *inode = d_inode(dentry);
2194 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2195 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2196 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
2197 struct cached_fid *cfid = NULL;
2199 if (cifs_i->time == 0)
2202 if (CIFS_CACHE_READ(cifs_i))
2205 if (!lookupCacheEnabled)
2208 if (!open_cached_dir_by_dentry(tcon, dentry->d_parent, &cfid)) {
2209 mutex_lock(&cfid->fid_mutex);
2210 if (cfid->time && cifs_i->time > cfid->time) {
2211 mutex_unlock(&cfid->fid_mutex);
2212 close_cached_dir(cfid);
2215 mutex_unlock(&cfid->fid_mutex);
2216 close_cached_dir(cfid);
2219 * depending on inode type, check if attribute caching disabled for
2220 * files or directories
2222 if (S_ISDIR(inode->i_mode)) {
2223 if (!cifs_sb->ctx->acdirmax)
2225 if (!time_in_range(jiffies, cifs_i->time,
2226 cifs_i->time + cifs_sb->ctx->acdirmax))
2229 if (!cifs_sb->ctx->acregmax)
2231 if (!time_in_range(jiffies, cifs_i->time,
2232 cifs_i->time + cifs_sb->ctx->acregmax))
2236 /* hardlinked files w/ noserverino get "special" treatment */
2237 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) &&
2238 S_ISREG(inode->i_mode) && inode->i_nlink != 1)
2245 * Zap the cache. Called when invalid_mapping flag is set.
2248 cifs_invalidate_mapping(struct inode *inode)
2252 if (inode->i_mapping && inode->i_mapping->nrpages != 0) {
2253 rc = invalidate_inode_pages2(inode->i_mapping);
2255 cifs_dbg(VFS, "%s: Could not invalidate inode %p\n",
2259 cifs_fscache_reset_inode_cookie(inode);
2264 * cifs_wait_bit_killable - helper for functions that are sleeping on bit locks
2266 * @key: currently unused
2267 * @mode: the task state to sleep in
2270 cifs_wait_bit_killable(struct wait_bit_key *key, int mode)
2272 freezable_schedule_unsafe();
2273 if (signal_pending_state(mode, current))
2274 return -ERESTARTSYS;
2279 cifs_revalidate_mapping(struct inode *inode)
2282 unsigned long *flags = &CIFS_I(inode)->flags;
2284 /* swapfiles are not supposed to be shared */
2285 if (IS_SWAPFILE(inode))
2288 rc = wait_on_bit_lock_action(flags, CIFS_INO_LOCK, cifs_wait_bit_killable,
2293 if (test_and_clear_bit(CIFS_INO_INVALID_MAPPING, flags)) {
2294 rc = cifs_invalidate_mapping(inode);
2296 set_bit(CIFS_INO_INVALID_MAPPING, flags);
2299 clear_bit_unlock(CIFS_INO_LOCK, flags);
2300 smp_mb__after_atomic();
2301 wake_up_bit(flags, CIFS_INO_LOCK);
2307 cifs_zap_mapping(struct inode *inode)
2309 set_bit(CIFS_INO_INVALID_MAPPING, &CIFS_I(inode)->flags);
2310 return cifs_revalidate_mapping(inode);
2313 int cifs_revalidate_file_attr(struct file *filp)
2316 struct dentry *dentry = file_dentry(filp);
2317 struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data;
2319 if (!cifs_dentry_needs_reval(dentry))
2322 if (tlink_tcon(cfile->tlink)->unix_ext)
2323 rc = cifs_get_file_info_unix(filp);
2325 rc = cifs_get_file_info(filp);
2330 int cifs_revalidate_dentry_attr(struct dentry *dentry)
2334 struct inode *inode = d_inode(dentry);
2335 struct super_block *sb = dentry->d_sb;
2336 const char *full_path;
2343 if (!cifs_dentry_needs_reval(dentry))
2348 page = alloc_dentry_path();
2349 full_path = build_path_from_dentry(dentry, page);
2350 if (IS_ERR(full_path)) {
2351 rc = PTR_ERR(full_path);
2355 cifs_dbg(FYI, "Update attributes: %s inode 0x%p count %d dentry: 0x%p d_time %ld jiffies %ld\n",
2356 full_path, inode, inode->i_count.counter,
2357 dentry, cifs_get_time(dentry), jiffies);
2360 if (cifs_sb_master_tcon(CIFS_SB(sb))->posix_extensions)
2361 rc = smb311_posix_get_inode_info(&inode, full_path, sb, xid);
2362 else if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext)
2363 rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid);
2365 rc = cifs_get_inode_info(&inode, full_path, NULL, sb,
2367 if (rc == -EAGAIN && count++ < 10)
2370 free_dentry_path(page);
2376 int cifs_revalidate_file(struct file *filp)
2379 struct inode *inode = file_inode(filp);
2381 rc = cifs_revalidate_file_attr(filp);
2385 return cifs_revalidate_mapping(inode);
2388 /* revalidate a dentry's inode attributes */
2389 int cifs_revalidate_dentry(struct dentry *dentry)
2392 struct inode *inode = d_inode(dentry);
2394 rc = cifs_revalidate_dentry_attr(dentry);
2398 return cifs_revalidate_mapping(inode);
2401 int cifs_getattr(struct user_namespace *mnt_userns, const struct path *path,
2402 struct kstat *stat, u32 request_mask, unsigned int flags)
2404 struct dentry *dentry = path->dentry;
2405 struct cifs_sb_info *cifs_sb = CIFS_SB(dentry->d_sb);
2406 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
2407 struct inode *inode = d_inode(dentry);
2411 * We need to be sure that all dirty pages are written and the server
2412 * has actual ctime, mtime and file length.
2414 if ((request_mask & (STATX_CTIME | STATX_MTIME | STATX_SIZE | STATX_BLOCKS)) &&
2415 !CIFS_CACHE_READ(CIFS_I(inode)) &&
2416 inode->i_mapping && inode->i_mapping->nrpages != 0) {
2417 rc = filemap_fdatawait(inode->i_mapping);
2419 mapping_set_error(inode->i_mapping, rc);
2424 if ((flags & AT_STATX_SYNC_TYPE) == AT_STATX_FORCE_SYNC)
2425 CIFS_I(inode)->time = 0; /* force revalidate */
2428 * If the caller doesn't require syncing, only sync if
2429 * necessary (e.g. due to earlier truncate or setattr
2430 * invalidating the cached metadata)
2432 if (((flags & AT_STATX_SYNC_TYPE) != AT_STATX_DONT_SYNC) ||
2433 (CIFS_I(inode)->time == 0)) {
2434 rc = cifs_revalidate_dentry_attr(dentry);
2439 generic_fillattr(&init_user_ns, inode, stat);
2440 stat->blksize = cifs_sb->ctx->bsize;
2441 stat->ino = CIFS_I(inode)->uniqueid;
2443 /* old CIFS Unix Extensions doesn't return create time */
2444 if (CIFS_I(inode)->createtime) {
2445 stat->result_mask |= STATX_BTIME;
2447 cifs_NTtimeToUnix(cpu_to_le64(CIFS_I(inode)->createtime));
2450 stat->attributes_mask |= (STATX_ATTR_COMPRESSED | STATX_ATTR_ENCRYPTED);
2451 if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_COMPRESSED)
2452 stat->attributes |= STATX_ATTR_COMPRESSED;
2453 if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_ENCRYPTED)
2454 stat->attributes |= STATX_ATTR_ENCRYPTED;
2457 * If on a multiuser mount without unix extensions or cifsacl being
2458 * enabled, and the admin hasn't overridden them, set the ownership
2459 * to the fsuid/fsgid of the current process.
2461 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) &&
2462 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
2464 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID))
2465 stat->uid = current_fsuid();
2466 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID))
2467 stat->gid = current_fsgid();
2472 int cifs_fiemap(struct inode *inode, struct fiemap_extent_info *fei, u64 start,
2475 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2476 struct cifs_sb_info *cifs_sb = CIFS_SB(cifs_i->vfs_inode.i_sb);
2477 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
2478 struct TCP_Server_Info *server = tcon->ses->server;
2479 struct cifsFileInfo *cfile;
2483 * We need to be sure that all dirty pages are written as they
2484 * might fill holes on the server.
2486 if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
2487 inode->i_mapping->nrpages != 0) {
2488 rc = filemap_fdatawait(inode->i_mapping);
2490 mapping_set_error(inode->i_mapping, rc);
2495 cfile = find_readable_file(cifs_i, false);
2499 if (server->ops->fiemap) {
2500 rc = server->ops->fiemap(tcon, cfile, fei, start, len);
2501 cifsFileInfo_put(cfile);
2505 cifsFileInfo_put(cfile);
2509 int cifs_truncate_page(struct address_space *mapping, loff_t from)
2511 pgoff_t index = from >> PAGE_SHIFT;
2512 unsigned offset = from & (PAGE_SIZE - 1);
2516 page = grab_cache_page(mapping, index);
2520 zero_user_segment(page, offset, PAGE_SIZE);
2526 void cifs_setsize(struct inode *inode, loff_t offset)
2528 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2530 spin_lock(&inode->i_lock);
2531 i_size_write(inode, offset);
2532 spin_unlock(&inode->i_lock);
2534 /* Cached inode must be refreshed on truncate */
2536 truncate_pagecache(inode, offset);
2540 cifs_set_file_size(struct inode *inode, struct iattr *attrs,
2541 unsigned int xid, const char *full_path)
2544 struct cifsFileInfo *open_file;
2545 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2546 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2547 struct tcon_link *tlink = NULL;
2548 struct cifs_tcon *tcon = NULL;
2549 struct TCP_Server_Info *server;
2552 * To avoid spurious oplock breaks from server, in the case of
2553 * inodes that we already have open, avoid doing path based
2554 * setting of file size if we can do it by handle.
2555 * This keeps our caching token (oplock) and avoids timeouts
2556 * when the local oplock break takes longer to flush
2557 * writebehind data than the SMB timeout for the SetPathInfo
2558 * request would allow
2560 open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY);
2562 tcon = tlink_tcon(open_file->tlink);
2563 server = tcon->ses->server;
2564 if (server->ops->set_file_size)
2565 rc = server->ops->set_file_size(xid, tcon, open_file,
2566 attrs->ia_size, false);
2569 cifsFileInfo_put(open_file);
2570 cifs_dbg(FYI, "SetFSize for attrs rc = %d\n", rc);
2578 tlink = cifs_sb_tlink(cifs_sb);
2580 return PTR_ERR(tlink);
2581 tcon = tlink_tcon(tlink);
2582 server = tcon->ses->server;
2586 * Set file size by pathname rather than by handle either because no
2587 * valid, writeable file handle for it was found or because there was
2588 * an error setting it by handle.
2590 if (server->ops->set_path_size)
2591 rc = server->ops->set_path_size(xid, tcon, full_path,
2592 attrs->ia_size, cifs_sb, false);
2595 cifs_dbg(FYI, "SetEOF by path (setattrs) rc = %d\n", rc);
2598 cifs_put_tlink(tlink);
2602 cifsInode->server_eof = attrs->ia_size;
2603 cifs_setsize(inode, attrs->ia_size);
2605 * i_blocks is not related to (i_size / i_blksize), but instead
2606 * 512 byte (2**9) size is required for calculating num blocks.
2607 * Until we can query the server for actual allocation size,
2608 * this is best estimate we have for blocks allocated for a file
2609 * Number of blocks must be rounded up so size 1 is not 0 blocks
2611 inode->i_blocks = (512 - 1 + attrs->ia_size) >> 9;
2614 * The man page of truncate says if the size changed,
2615 * then the st_ctime and st_mtime fields for the file
2618 attrs->ia_ctime = attrs->ia_mtime = current_time(inode);
2619 attrs->ia_valid |= ATTR_CTIME | ATTR_MTIME;
2621 cifs_truncate_page(inode->i_mapping, inode->i_size);
2628 cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
2632 const char *full_path;
2633 void *page = alloc_dentry_path();
2634 struct inode *inode = d_inode(direntry);
2635 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2636 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2637 struct tcon_link *tlink;
2638 struct cifs_tcon *pTcon;
2639 struct cifs_unix_set_info_args *args = NULL;
2640 struct cifsFileInfo *open_file;
2642 cifs_dbg(FYI, "setattr_unix on file %pd attrs->ia_valid=0x%x\n",
2643 direntry, attrs->ia_valid);
2647 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
2648 attrs->ia_valid |= ATTR_FORCE;
2650 rc = setattr_prepare(&init_user_ns, direntry, attrs);
2654 full_path = build_path_from_dentry(direntry, page);
2655 if (IS_ERR(full_path)) {
2656 rc = PTR_ERR(full_path);
2661 * Attempt to flush data before changing attributes. We need to do
2662 * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the
2663 * ownership or mode then we may also need to do this. Here, we take
2664 * the safe way out and just do the flush on all setattr requests. If
2665 * the flush returns error, store it to report later and continue.
2667 * BB: This should be smarter. Why bother flushing pages that
2668 * will be truncated anyway? Also, should we error out here if
2669 * the flush returns error?
2671 rc = filemap_write_and_wait(inode->i_mapping);
2672 if (is_interrupt_error(rc)) {
2677 mapping_set_error(inode->i_mapping, rc);
2680 if (attrs->ia_valid & ATTR_SIZE) {
2681 rc = cifs_set_file_size(inode, attrs, xid, full_path);
2686 /* skip mode change if it's just for clearing setuid/setgid */
2687 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
2688 attrs->ia_valid &= ~ATTR_MODE;
2690 args = kmalloc(sizeof(*args), GFP_KERNEL);
2696 /* set up the struct */
2697 if (attrs->ia_valid & ATTR_MODE)
2698 args->mode = attrs->ia_mode;
2700 args->mode = NO_CHANGE_64;
2702 if (attrs->ia_valid & ATTR_UID)
2703 args->uid = attrs->ia_uid;
2705 args->uid = INVALID_UID; /* no change */
2707 if (attrs->ia_valid & ATTR_GID)
2708 args->gid = attrs->ia_gid;
2710 args->gid = INVALID_GID; /* no change */
2712 if (attrs->ia_valid & ATTR_ATIME)
2713 args->atime = cifs_UnixTimeToNT(attrs->ia_atime);
2715 args->atime = NO_CHANGE_64;
2717 if (attrs->ia_valid & ATTR_MTIME)
2718 args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime);
2720 args->mtime = NO_CHANGE_64;
2722 if (attrs->ia_valid & ATTR_CTIME)
2723 args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime);
2725 args->ctime = NO_CHANGE_64;
2728 open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY);
2730 u16 nfid = open_file->fid.netfid;
2731 u32 npid = open_file->pid;
2732 pTcon = tlink_tcon(open_file->tlink);
2733 rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid);
2734 cifsFileInfo_put(open_file);
2736 tlink = cifs_sb_tlink(cifs_sb);
2737 if (IS_ERR(tlink)) {
2738 rc = PTR_ERR(tlink);
2741 pTcon = tlink_tcon(tlink);
2742 rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args,
2744 cifs_remap(cifs_sb));
2745 cifs_put_tlink(tlink);
2751 if ((attrs->ia_valid & ATTR_SIZE) &&
2752 attrs->ia_size != i_size_read(inode))
2753 truncate_setsize(inode, attrs->ia_size);
2755 setattr_copy(&init_user_ns, inode, attrs);
2756 mark_inode_dirty(inode);
2758 /* force revalidate when any of these times are set since some
2759 of the fs types (eg ext3, fat) do not have fine enough
2760 time granularity to match protocol, and we do not have a
2761 a way (yet) to query the server fs's time granularity (and
2762 whether it rounds times down).
2764 if (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME))
2765 cifsInode->time = 0;
2768 free_dentry_path(page);
2774 cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
2777 kuid_t uid = INVALID_UID;
2778 kgid_t gid = INVALID_GID;
2779 struct inode *inode = d_inode(direntry);
2780 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2781 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2782 struct cifsFileInfo *wfile;
2783 struct cifs_tcon *tcon;
2784 const char *full_path;
2785 void *page = alloc_dentry_path();
2788 __u64 mode = NO_CHANGE_64;
2792 cifs_dbg(FYI, "setattr on file %pd attrs->ia_valid 0x%x\n",
2793 direntry, attrs->ia_valid);
2795 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
2796 attrs->ia_valid |= ATTR_FORCE;
2798 rc = setattr_prepare(&init_user_ns, direntry, attrs);
2800 goto cifs_setattr_exit;
2802 full_path = build_path_from_dentry(direntry, page);
2803 if (IS_ERR(full_path)) {
2804 rc = PTR_ERR(full_path);
2805 goto cifs_setattr_exit;
2809 * Attempt to flush data before changing attributes. We need to do
2810 * this for ATTR_SIZE and ATTR_MTIME. If the flush of the data
2811 * returns error, store it to report later and continue.
2813 * BB: This should be smarter. Why bother flushing pages that
2814 * will be truncated anyway? Also, should we error out here if
2815 * the flush returns error? Do we need to check for ATTR_MTIME_SET flag?
2817 if (attrs->ia_valid & (ATTR_MTIME | ATTR_SIZE | ATTR_CTIME)) {
2818 rc = filemap_write_and_wait(inode->i_mapping);
2819 if (is_interrupt_error(rc)) {
2821 goto cifs_setattr_exit;
2823 mapping_set_error(inode->i_mapping, rc);
2828 if ((attrs->ia_valid & ATTR_MTIME) &&
2829 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) {
2830 rc = cifs_get_writable_file(cifsInode, FIND_WR_ANY, &wfile);
2832 tcon = tlink_tcon(wfile->tlink);
2833 rc = tcon->ses->server->ops->flush(xid, tcon, &wfile->fid);
2834 cifsFileInfo_put(wfile);
2836 goto cifs_setattr_exit;
2837 } else if (rc != -EBADF)
2838 goto cifs_setattr_exit;
2843 if (attrs->ia_valid & ATTR_SIZE) {
2844 rc = cifs_set_file_size(inode, attrs, xid, full_path);
2846 goto cifs_setattr_exit;
2849 if (attrs->ia_valid & ATTR_UID)
2850 uid = attrs->ia_uid;
2852 if (attrs->ia_valid & ATTR_GID)
2853 gid = attrs->ia_gid;
2855 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) ||
2856 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) {
2857 if (uid_valid(uid) || gid_valid(gid)) {
2858 mode = NO_CHANGE_64;
2859 rc = id_mode_to_cifs_acl(inode, full_path, &mode,
2862 cifs_dbg(FYI, "%s: Setting id failed with error: %d\n",
2864 goto cifs_setattr_exit;
2868 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID))
2869 attrs->ia_valid &= ~(ATTR_UID | ATTR_GID);
2871 /* skip mode change if it's just for clearing setuid/setgid */
2872 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
2873 attrs->ia_valid &= ~ATTR_MODE;
2875 if (attrs->ia_valid & ATTR_MODE) {
2876 mode = attrs->ia_mode;
2878 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) ||
2879 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) {
2880 rc = id_mode_to_cifs_acl(inode, full_path, &mode,
2881 INVALID_UID, INVALID_GID);
2883 cifs_dbg(FYI, "%s: Setting ACL failed with error: %d\n",
2885 goto cifs_setattr_exit;
2889 * In case of CIFS_MOUNT_CIFS_ACL, we cannot support all modes.
2890 * Pick up the actual mode bits that were set.
2892 if (mode != attrs->ia_mode)
2893 attrs->ia_mode = mode;
2895 if (((mode & S_IWUGO) == 0) &&
2896 (cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
2898 dosattr = cifsInode->cifsAttrs | ATTR_READONLY;
2900 /* fix up mode if we're not using dynperm */
2901 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
2902 attrs->ia_mode = inode->i_mode & ~S_IWUGO;
2903 } else if ((mode & S_IWUGO) &&
2904 (cifsInode->cifsAttrs & ATTR_READONLY)) {
2906 dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
2907 /* Attributes of 0 are ignored */
2909 dosattr |= ATTR_NORMAL;
2911 /* reset local inode permissions to normal */
2912 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2913 attrs->ia_mode &= ~(S_IALLUGO);
2914 if (S_ISDIR(inode->i_mode))
2916 cifs_sb->ctx->dir_mode;
2919 cifs_sb->ctx->file_mode;
2921 } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2922 /* ignore mode change - ATTR_READONLY hasn't changed */
2923 attrs->ia_valid &= ~ATTR_MODE;
2927 if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) ||
2928 ((attrs->ia_valid & ATTR_MODE) && dosattr)) {
2929 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
2930 /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */
2932 /* Even if error on time set, no sense failing the call if
2933 the server would set the time to a reasonable value anyway,
2934 and this check ensures that we are not being called from
2935 sys_utimes in which case we ought to fail the call back to
2936 the user when the server rejects the call */
2937 if ((rc) && (attrs->ia_valid &
2938 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
2942 /* do not need local check to inode_check_ok since the server does
2945 goto cifs_setattr_exit;
2947 if ((attrs->ia_valid & ATTR_SIZE) &&
2948 attrs->ia_size != i_size_read(inode))
2949 truncate_setsize(inode, attrs->ia_size);
2951 setattr_copy(&init_user_ns, inode, attrs);
2952 mark_inode_dirty(inode);
2956 free_dentry_path(page);
2961 cifs_setattr(struct user_namespace *mnt_userns, struct dentry *direntry,
2962 struct iattr *attrs)
2964 struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
2965 struct cifs_tcon *pTcon = cifs_sb_master_tcon(cifs_sb);
2966 int rc, retries = 0;
2969 if (pTcon->unix_ext)
2970 rc = cifs_setattr_unix(direntry, attrs);
2972 rc = cifs_setattr_nounix(direntry, attrs);
2974 } while (is_retryable_error(rc) && retries < 2);
2976 /* BB: add cifs_setattr_legacy for really old servers */