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 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 char *full_path = NULL;
1613 struct inode *inode = d_inode(dentry);
1614 struct cifsInodeInfo *cifs_inode;
1615 struct super_block *sb = dir->i_sb;
1616 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1617 struct tcon_link *tlink;
1618 struct cifs_tcon *tcon;
1619 struct TCP_Server_Info *server;
1620 struct iattr *attrs = NULL;
1621 __u32 dosattr = 0, origattr = 0;
1623 cifs_dbg(FYI, "cifs_unlink, dir=0x%p, dentry=0x%p\n", dir, dentry);
1625 tlink = cifs_sb_tlink(cifs_sb);
1627 return PTR_ERR(tlink);
1628 tcon = tlink_tcon(tlink);
1629 server = tcon->ses->server;
1633 if (tcon->nodelete) {
1638 /* Unlink can be called from rename so we can not take the
1639 * sb->s_vfs_rename_mutex here */
1640 full_path = build_path_from_dentry(dentry);
1641 if (full_path == NULL) {
1646 if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1647 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1648 rc = CIFSPOSIXDelFile(xid, tcon, full_path,
1649 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
1650 cifs_remap(cifs_sb));
1651 cifs_dbg(FYI, "posix del rc %d\n", rc);
1652 if ((rc == 0) || (rc == -ENOENT))
1653 goto psx_del_no_retry;
1657 if (!server->ops->unlink) {
1659 goto psx_del_no_retry;
1662 rc = server->ops->unlink(xid, tcon, full_path, cifs_sb);
1667 cifs_drop_nlink(inode);
1668 } else if (rc == -ENOENT) {
1670 } else if (rc == -EBUSY) {
1671 if (server->ops->rename_pending_delete) {
1672 rc = server->ops->rename_pending_delete(full_path,
1675 cifs_drop_nlink(inode);
1677 } else if ((rc == -EACCES) && (dosattr == 0) && inode) {
1678 attrs = kzalloc(sizeof(*attrs), GFP_KERNEL);
1679 if (attrs == NULL) {
1684 /* try to reset dos attributes */
1685 cifs_inode = CIFS_I(inode);
1686 origattr = cifs_inode->cifsAttrs;
1688 origattr |= ATTR_NORMAL;
1689 dosattr = origattr & ~ATTR_READONLY;
1691 dosattr |= ATTR_NORMAL;
1692 dosattr |= ATTR_HIDDEN;
1694 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
1698 goto retry_std_delete;
1701 /* undo the setattr if we errored out and it's needed */
1702 if (rc != 0 && dosattr != 0)
1703 cifs_set_file_info(inode, attrs, xid, full_path, origattr);
1707 cifs_inode = CIFS_I(inode);
1708 cifs_inode->time = 0; /* will force revalidate to get info
1710 inode->i_ctime = current_time(inode);
1712 dir->i_ctime = dir->i_mtime = current_time(dir);
1713 cifs_inode = CIFS_I(dir);
1714 CIFS_I(dir)->time = 0; /* force revalidate of dir as well */
1719 cifs_put_tlink(tlink);
1724 cifs_mkdir_qinfo(struct inode *parent, struct dentry *dentry, umode_t mode,
1725 const char *full_path, struct cifs_sb_info *cifs_sb,
1726 struct cifs_tcon *tcon, const unsigned int xid)
1729 struct inode *inode = NULL;
1731 if (tcon->posix_extensions)
1732 rc = smb311_posix_get_inode_info(&inode, full_path, parent->i_sb, xid);
1733 else if (tcon->unix_ext)
1734 rc = cifs_get_inode_info_unix(&inode, full_path, parent->i_sb,
1737 rc = cifs_get_inode_info(&inode, full_path, NULL, parent->i_sb,
1744 * setting nlink not necessary except in cases where we failed to get it
1745 * from the server or was set bogus. Also, since this is a brand new
1746 * inode, no need to grab the i_lock before setting the i_nlink.
1748 if (inode->i_nlink < 2)
1749 set_nlink(inode, 2);
1750 mode &= ~current_umask();
1751 /* must turn on setgid bit if parent dir has it */
1752 if (parent->i_mode & S_ISGID)
1755 if (tcon->unix_ext) {
1756 struct cifs_unix_set_info_args args = {
1758 .ctime = NO_CHANGE_64,
1759 .atime = NO_CHANGE_64,
1760 .mtime = NO_CHANGE_64,
1763 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1764 args.uid = current_fsuid();
1765 if (parent->i_mode & S_ISGID)
1766 args.gid = parent->i_gid;
1768 args.gid = current_fsgid();
1770 args.uid = INVALID_UID; /* no change */
1771 args.gid = INVALID_GID; /* no change */
1773 CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args,
1775 cifs_remap(cifs_sb));
1777 struct TCP_Server_Info *server = tcon->ses->server;
1778 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
1779 (mode & S_IWUGO) == 0 && server->ops->mkdir_setinfo)
1780 server->ops->mkdir_setinfo(inode, full_path, cifs_sb,
1782 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
1783 inode->i_mode = (mode | S_IFDIR);
1785 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1786 inode->i_uid = current_fsuid();
1787 if (inode->i_mode & S_ISGID)
1788 inode->i_gid = parent->i_gid;
1790 inode->i_gid = current_fsgid();
1793 d_instantiate(dentry, inode);
1798 cifs_posix_mkdir(struct inode *inode, struct dentry *dentry, umode_t mode,
1799 const char *full_path, struct cifs_sb_info *cifs_sb,
1800 struct cifs_tcon *tcon, const unsigned int xid)
1804 FILE_UNIX_BASIC_INFO *info = NULL;
1805 struct inode *newinode = NULL;
1806 struct cifs_fattr fattr;
1808 info = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1811 goto posix_mkdir_out;
1814 mode &= ~current_umask();
1815 rc = CIFSPOSIXCreate(xid, tcon, SMB_O_DIRECTORY | SMB_O_CREAT, mode,
1816 NULL /* netfid */, info, &oplock, full_path,
1817 cifs_sb->local_nls, cifs_remap(cifs_sb));
1818 if (rc == -EOPNOTSUPP)
1819 goto posix_mkdir_out;
1821 cifs_dbg(FYI, "posix mkdir returned 0x%x\n", rc);
1823 goto posix_mkdir_out;
1826 if (info->Type == cpu_to_le32(-1))
1827 /* no return info, go query for it */
1828 goto posix_mkdir_get_info;
1830 * BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if
1831 * need to set uid/gid.
1834 cifs_unix_basic_to_fattr(&fattr, info, cifs_sb);
1835 cifs_fill_uniqueid(inode->i_sb, &fattr);
1836 newinode = cifs_iget(inode->i_sb, &fattr);
1838 goto posix_mkdir_get_info;
1840 d_instantiate(dentry, newinode);
1842 #ifdef CONFIG_CIFS_DEBUG2
1843 cifs_dbg(FYI, "instantiated dentry %p %pd to inode %p\n",
1844 dentry, dentry, newinode);
1846 if (newinode->i_nlink != 2)
1847 cifs_dbg(FYI, "unexpected number of links %d\n",
1854 posix_mkdir_get_info:
1855 rc = cifs_mkdir_qinfo(inode, dentry, mode, full_path, cifs_sb, tcon,
1857 goto posix_mkdir_out;
1860 int cifs_mkdir(struct user_namespace *mnt_userns, struct inode *inode,
1861 struct dentry *direntry, umode_t mode)
1865 struct cifs_sb_info *cifs_sb;
1866 struct tcon_link *tlink;
1867 struct cifs_tcon *tcon;
1868 struct TCP_Server_Info *server;
1871 cifs_dbg(FYI, "In cifs_mkdir, mode = %04ho inode = 0x%p\n",
1874 cifs_sb = CIFS_SB(inode->i_sb);
1875 tlink = cifs_sb_tlink(cifs_sb);
1877 return PTR_ERR(tlink);
1878 tcon = tlink_tcon(tlink);
1882 full_path = build_path_from_dentry(direntry);
1883 if (full_path == NULL) {
1888 server = tcon->ses->server;
1890 if ((server->ops->posix_mkdir) && (tcon->posix_extensions)) {
1891 rc = server->ops->posix_mkdir(xid, inode, mode, tcon, full_path,
1893 d_drop(direntry); /* for time being always refresh inode info */
1897 if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1898 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1899 rc = cifs_posix_mkdir(inode, direntry, mode, full_path, cifs_sb,
1901 if (rc != -EOPNOTSUPP)
1905 if (!server->ops->mkdir) {
1910 /* BB add setting the equivalent of mode via CreateX w/ACLs */
1911 rc = server->ops->mkdir(xid, inode, mode, tcon, full_path, cifs_sb);
1913 cifs_dbg(FYI, "cifs_mkdir returned 0x%x\n", rc);
1918 /* TODO: skip this for smb2/smb3 */
1919 rc = cifs_mkdir_qinfo(inode, direntry, mode, full_path, cifs_sb, tcon,
1923 * Force revalidate to get parent dir info when needed since cached
1924 * attributes are invalid now.
1926 CIFS_I(inode)->time = 0;
1929 cifs_put_tlink(tlink);
1933 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1937 struct cifs_sb_info *cifs_sb;
1938 struct tcon_link *tlink;
1939 struct cifs_tcon *tcon;
1940 struct TCP_Server_Info *server;
1941 char *full_path = NULL;
1942 struct cifsInodeInfo *cifsInode;
1944 cifs_dbg(FYI, "cifs_rmdir, inode = 0x%p\n", inode);
1948 full_path = build_path_from_dentry(direntry);
1949 if (full_path == NULL) {
1954 cifs_sb = CIFS_SB(inode->i_sb);
1955 tlink = cifs_sb_tlink(cifs_sb);
1956 if (IS_ERR(tlink)) {
1957 rc = PTR_ERR(tlink);
1960 tcon = tlink_tcon(tlink);
1961 server = tcon->ses->server;
1963 if (!server->ops->rmdir) {
1965 cifs_put_tlink(tlink);
1969 if (tcon->nodelete) {
1971 cifs_put_tlink(tlink);
1975 rc = server->ops->rmdir(xid, tcon, full_path, cifs_sb);
1976 cifs_put_tlink(tlink);
1979 spin_lock(&d_inode(direntry)->i_lock);
1980 i_size_write(d_inode(direntry), 0);
1981 clear_nlink(d_inode(direntry));
1982 spin_unlock(&d_inode(direntry)->i_lock);
1985 cifsInode = CIFS_I(d_inode(direntry));
1986 /* force revalidate to go get info when needed */
1987 cifsInode->time = 0;
1989 cifsInode = CIFS_I(inode);
1991 * Force revalidate to get parent dir info when needed since cached
1992 * attributes are invalid now.
1994 cifsInode->time = 0;
1996 d_inode(direntry)->i_ctime = inode->i_ctime = inode->i_mtime =
1997 current_time(inode);
2006 cifs_do_rename(const unsigned int xid, struct dentry *from_dentry,
2007 const char *from_path, struct dentry *to_dentry,
2008 const char *to_path)
2010 struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb);
2011 struct tcon_link *tlink;
2012 struct cifs_tcon *tcon;
2013 struct TCP_Server_Info *server;
2014 struct cifs_fid fid;
2015 struct cifs_open_parms oparms;
2018 tlink = cifs_sb_tlink(cifs_sb);
2020 return PTR_ERR(tlink);
2021 tcon = tlink_tcon(tlink);
2022 server = tcon->ses->server;
2024 if (!server->ops->rename)
2027 /* try path-based rename first */
2028 rc = server->ops->rename(xid, tcon, from_path, to_path, cifs_sb);
2031 * Don't bother with rename by filehandle unless file is busy and
2032 * source. Note that cross directory moves do not work with
2033 * rename by filehandle to various Windows servers.
2035 if (rc == 0 || rc != -EBUSY)
2036 goto do_rename_exit;
2038 /* Don't fall back to using SMB on SMB 2+ mount */
2039 if (server->vals->protocol_id != 0)
2040 goto do_rename_exit;
2042 /* open-file renames don't work across directories */
2043 if (to_dentry->d_parent != from_dentry->d_parent)
2044 goto do_rename_exit;
2047 oparms.cifs_sb = cifs_sb;
2048 /* open the file to be renamed -- we need DELETE perms */
2049 oparms.desired_access = DELETE;
2050 oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR);
2051 oparms.disposition = FILE_OPEN;
2052 oparms.path = from_path;
2054 oparms.reconnect = false;
2056 rc = CIFS_open(xid, &oparms, &oplock, NULL);
2058 rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid,
2059 (const char *) to_dentry->d_name.name,
2060 cifs_sb->local_nls, cifs_remap(cifs_sb));
2061 CIFSSMBClose(xid, tcon, fid.netfid);
2065 d_move(from_dentry, to_dentry);
2066 cifs_put_tlink(tlink);
2071 cifs_rename2(struct user_namespace *mnt_userns, struct inode *source_dir,
2072 struct dentry *source_dentry, struct inode *target_dir,
2073 struct dentry *target_dentry, unsigned int flags)
2075 char *from_name = NULL;
2076 char *to_name = NULL;
2077 struct cifs_sb_info *cifs_sb;
2078 struct tcon_link *tlink;
2079 struct cifs_tcon *tcon;
2080 FILE_UNIX_BASIC_INFO *info_buf_source = NULL;
2081 FILE_UNIX_BASIC_INFO *info_buf_target;
2085 if (flags & ~RENAME_NOREPLACE)
2088 cifs_sb = CIFS_SB(source_dir->i_sb);
2089 tlink = cifs_sb_tlink(cifs_sb);
2091 return PTR_ERR(tlink);
2092 tcon = tlink_tcon(tlink);
2097 * we already have the rename sem so we do not need to
2098 * grab it again here to protect the path integrity
2100 from_name = build_path_from_dentry(source_dentry);
2101 if (from_name == NULL) {
2103 goto cifs_rename_exit;
2106 to_name = build_path_from_dentry(target_dentry);
2107 if (to_name == NULL) {
2109 goto cifs_rename_exit;
2112 rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry,
2116 * No-replace is the natural behavior for CIFS, so skip unlink hacks.
2118 if (flags & RENAME_NOREPLACE)
2119 goto cifs_rename_exit;
2121 if (rc == -EEXIST && tcon->unix_ext) {
2123 * Are src and dst hardlinks of same inode? We can only tell
2124 * with unix extensions enabled.
2127 kmalloc_array(2, sizeof(FILE_UNIX_BASIC_INFO),
2129 if (info_buf_source == NULL) {
2131 goto cifs_rename_exit;
2134 info_buf_target = info_buf_source + 1;
2135 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, from_name,
2138 cifs_remap(cifs_sb));
2142 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, to_name,
2145 cifs_remap(cifs_sb));
2147 if (tmprc == 0 && (info_buf_source->UniqueId ==
2148 info_buf_target->UniqueId)) {
2149 /* same file, POSIX says that this is a noop */
2151 goto cifs_rename_exit;
2155 * else ... BB we could add the same check for Windows by
2156 * checking the UniqueId via FILE_INTERNAL_INFO
2160 /* Try unlinking the target dentry if it's not negative */
2161 if (d_really_is_positive(target_dentry) && (rc == -EACCES || rc == -EEXIST)) {
2162 if (d_is_dir(target_dentry))
2163 tmprc = cifs_rmdir(target_dir, target_dentry);
2165 tmprc = cifs_unlink(target_dir, target_dentry);
2167 goto cifs_rename_exit;
2168 rc = cifs_do_rename(xid, source_dentry, from_name,
2169 target_dentry, to_name);
2172 /* force revalidate to go get info when needed */
2173 CIFS_I(source_dir)->time = CIFS_I(target_dir)->time = 0;
2175 source_dir->i_ctime = source_dir->i_mtime = target_dir->i_ctime =
2176 target_dir->i_mtime = current_time(source_dir);
2179 kfree(info_buf_source);
2183 cifs_put_tlink(tlink);
2188 cifs_inode_needs_reval(struct inode *inode)
2190 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2191 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2193 if (cifs_i->time == 0)
2196 if (CIFS_CACHE_READ(cifs_i))
2199 if (!lookupCacheEnabled)
2202 if (!cifs_sb->ctx->actimeo)
2205 if (!time_in_range(jiffies, cifs_i->time,
2206 cifs_i->time + cifs_sb->ctx->actimeo))
2209 /* hardlinked files w/ noserverino get "special" treatment */
2210 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) &&
2211 S_ISREG(inode->i_mode) && inode->i_nlink != 1)
2218 * Zap the cache. Called when invalid_mapping flag is set.
2221 cifs_invalidate_mapping(struct inode *inode)
2225 if (inode->i_mapping && inode->i_mapping->nrpages != 0) {
2226 rc = invalidate_inode_pages2(inode->i_mapping);
2228 cifs_dbg(VFS, "%s: Could not invalidate inode %p\n",
2232 cifs_fscache_reset_inode_cookie(inode);
2237 * cifs_wait_bit_killable - helper for functions that are sleeping on bit locks
2239 * @key: currently unused
2240 * @mode: the task state to sleep in
2243 cifs_wait_bit_killable(struct wait_bit_key *key, int mode)
2245 freezable_schedule_unsafe();
2246 if (signal_pending_state(mode, current))
2247 return -ERESTARTSYS;
2252 cifs_revalidate_mapping(struct inode *inode)
2255 unsigned long *flags = &CIFS_I(inode)->flags;
2257 /* swapfiles are not supposed to be shared */
2258 if (IS_SWAPFILE(inode))
2261 rc = wait_on_bit_lock_action(flags, CIFS_INO_LOCK, cifs_wait_bit_killable,
2266 if (test_and_clear_bit(CIFS_INO_INVALID_MAPPING, flags)) {
2267 rc = cifs_invalidate_mapping(inode);
2269 set_bit(CIFS_INO_INVALID_MAPPING, flags);
2272 clear_bit_unlock(CIFS_INO_LOCK, flags);
2273 smp_mb__after_atomic();
2274 wake_up_bit(flags, CIFS_INO_LOCK);
2280 cifs_zap_mapping(struct inode *inode)
2282 set_bit(CIFS_INO_INVALID_MAPPING, &CIFS_I(inode)->flags);
2283 return cifs_revalidate_mapping(inode);
2286 int cifs_revalidate_file_attr(struct file *filp)
2289 struct inode *inode = file_inode(filp);
2290 struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data;
2292 if (!cifs_inode_needs_reval(inode))
2295 if (tlink_tcon(cfile->tlink)->unix_ext)
2296 rc = cifs_get_file_info_unix(filp);
2298 rc = cifs_get_file_info(filp);
2303 int cifs_revalidate_dentry_attr(struct dentry *dentry)
2307 struct inode *inode = d_inode(dentry);
2308 struct super_block *sb = dentry->d_sb;
2309 char *full_path = NULL;
2315 if (!cifs_inode_needs_reval(inode))
2320 /* can not safely grab the rename sem here if rename calls revalidate
2321 since that would deadlock */
2322 full_path = build_path_from_dentry(dentry);
2323 if (full_path == NULL) {
2328 cifs_dbg(FYI, "Update attributes: %s inode 0x%p count %d dentry: 0x%p d_time %ld jiffies %ld\n",
2329 full_path, inode, inode->i_count.counter,
2330 dentry, cifs_get_time(dentry), jiffies);
2333 if (cifs_sb_master_tcon(CIFS_SB(sb))->posix_extensions)
2334 rc = smb311_posix_get_inode_info(&inode, full_path, sb, xid);
2335 else if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext)
2336 rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid);
2338 rc = cifs_get_inode_info(&inode, full_path, NULL, sb,
2340 if (rc == -EAGAIN && count++ < 10)
2349 int cifs_revalidate_file(struct file *filp)
2352 struct inode *inode = file_inode(filp);
2354 rc = cifs_revalidate_file_attr(filp);
2358 return cifs_revalidate_mapping(inode);
2361 /* revalidate a dentry's inode attributes */
2362 int cifs_revalidate_dentry(struct dentry *dentry)
2365 struct inode *inode = d_inode(dentry);
2367 rc = cifs_revalidate_dentry_attr(dentry);
2371 return cifs_revalidate_mapping(inode);
2374 int cifs_getattr(struct user_namespace *mnt_userns, const struct path *path,
2375 struct kstat *stat, u32 request_mask, unsigned int flags)
2377 struct dentry *dentry = path->dentry;
2378 struct cifs_sb_info *cifs_sb = CIFS_SB(dentry->d_sb);
2379 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
2380 struct inode *inode = d_inode(dentry);
2384 * We need to be sure that all dirty pages are written and the server
2385 * has actual ctime, mtime and file length.
2387 if ((request_mask & (STATX_CTIME | STATX_MTIME | STATX_SIZE)) &&
2388 !CIFS_CACHE_READ(CIFS_I(inode)) &&
2389 inode->i_mapping && inode->i_mapping->nrpages != 0) {
2390 rc = filemap_fdatawait(inode->i_mapping);
2392 mapping_set_error(inode->i_mapping, rc);
2397 if ((flags & AT_STATX_SYNC_TYPE) == AT_STATX_FORCE_SYNC)
2398 CIFS_I(inode)->time = 0; /* force revalidate */
2401 * If the caller doesn't require syncing, only sync if
2402 * necessary (e.g. due to earlier truncate or setattr
2403 * invalidating the cached metadata)
2405 if (((flags & AT_STATX_SYNC_TYPE) != AT_STATX_DONT_SYNC) ||
2406 (CIFS_I(inode)->time == 0)) {
2407 rc = cifs_revalidate_dentry_attr(dentry);
2412 generic_fillattr(&init_user_ns, inode, stat);
2413 stat->blksize = cifs_sb->ctx->bsize;
2414 stat->ino = CIFS_I(inode)->uniqueid;
2416 /* old CIFS Unix Extensions doesn't return create time */
2417 if (CIFS_I(inode)->createtime) {
2418 stat->result_mask |= STATX_BTIME;
2420 cifs_NTtimeToUnix(cpu_to_le64(CIFS_I(inode)->createtime));
2423 stat->attributes_mask |= (STATX_ATTR_COMPRESSED | STATX_ATTR_ENCRYPTED);
2424 if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_COMPRESSED)
2425 stat->attributes |= STATX_ATTR_COMPRESSED;
2426 if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_ENCRYPTED)
2427 stat->attributes |= STATX_ATTR_ENCRYPTED;
2430 * If on a multiuser mount without unix extensions or cifsacl being
2431 * enabled, and the admin hasn't overridden them, set the ownership
2432 * to the fsuid/fsgid of the current process.
2434 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) &&
2435 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
2437 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID))
2438 stat->uid = current_fsuid();
2439 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID))
2440 stat->gid = current_fsgid();
2445 int cifs_fiemap(struct inode *inode, struct fiemap_extent_info *fei, u64 start,
2448 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2449 struct cifs_sb_info *cifs_sb = CIFS_SB(cifs_i->vfs_inode.i_sb);
2450 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
2451 struct TCP_Server_Info *server = tcon->ses->server;
2452 struct cifsFileInfo *cfile;
2456 * We need to be sure that all dirty pages are written as they
2457 * might fill holes on the server.
2459 if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
2460 inode->i_mapping->nrpages != 0) {
2461 rc = filemap_fdatawait(inode->i_mapping);
2463 mapping_set_error(inode->i_mapping, rc);
2468 cfile = find_readable_file(cifs_i, false);
2472 if (server->ops->fiemap) {
2473 rc = server->ops->fiemap(tcon, cfile, fei, start, len);
2474 cifsFileInfo_put(cfile);
2478 cifsFileInfo_put(cfile);
2482 int cifs_truncate_page(struct address_space *mapping, loff_t from)
2484 pgoff_t index = from >> PAGE_SHIFT;
2485 unsigned offset = from & (PAGE_SIZE - 1);
2489 page = grab_cache_page(mapping, index);
2493 zero_user_segment(page, offset, PAGE_SIZE);
2499 void cifs_setsize(struct inode *inode, loff_t offset)
2501 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2503 spin_lock(&inode->i_lock);
2504 i_size_write(inode, offset);
2505 spin_unlock(&inode->i_lock);
2507 /* Cached inode must be refreshed on truncate */
2509 truncate_pagecache(inode, offset);
2513 cifs_set_file_size(struct inode *inode, struct iattr *attrs,
2514 unsigned int xid, char *full_path)
2517 struct cifsFileInfo *open_file;
2518 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2519 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2520 struct tcon_link *tlink = NULL;
2521 struct cifs_tcon *tcon = NULL;
2522 struct TCP_Server_Info *server;
2525 * To avoid spurious oplock breaks from server, in the case of
2526 * inodes that we already have open, avoid doing path based
2527 * setting of file size if we can do it by handle.
2528 * This keeps our caching token (oplock) and avoids timeouts
2529 * when the local oplock break takes longer to flush
2530 * writebehind data than the SMB timeout for the SetPathInfo
2531 * request would allow
2533 open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY);
2535 tcon = tlink_tcon(open_file->tlink);
2536 server = tcon->ses->server;
2537 if (server->ops->set_file_size)
2538 rc = server->ops->set_file_size(xid, tcon, open_file,
2539 attrs->ia_size, false);
2542 cifsFileInfo_put(open_file);
2543 cifs_dbg(FYI, "SetFSize for attrs rc = %d\n", rc);
2551 tlink = cifs_sb_tlink(cifs_sb);
2553 return PTR_ERR(tlink);
2554 tcon = tlink_tcon(tlink);
2555 server = tcon->ses->server;
2559 * Set file size by pathname rather than by handle either because no
2560 * valid, writeable file handle for it was found or because there was
2561 * an error setting it by handle.
2563 if (server->ops->set_path_size)
2564 rc = server->ops->set_path_size(xid, tcon, full_path,
2565 attrs->ia_size, cifs_sb, false);
2568 cifs_dbg(FYI, "SetEOF by path (setattrs) rc = %d\n", rc);
2571 cifs_put_tlink(tlink);
2575 cifsInode->server_eof = attrs->ia_size;
2576 cifs_setsize(inode, attrs->ia_size);
2579 * The man page of truncate says if the size changed,
2580 * then the st_ctime and st_mtime fields for the file
2583 attrs->ia_ctime = attrs->ia_mtime = current_time(inode);
2584 attrs->ia_valid |= ATTR_CTIME | ATTR_MTIME;
2586 cifs_truncate_page(inode->i_mapping, inode->i_size);
2593 cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
2597 char *full_path = NULL;
2598 struct inode *inode = d_inode(direntry);
2599 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2600 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2601 struct tcon_link *tlink;
2602 struct cifs_tcon *pTcon;
2603 struct cifs_unix_set_info_args *args = NULL;
2604 struct cifsFileInfo *open_file;
2606 cifs_dbg(FYI, "setattr_unix on file %pd attrs->ia_valid=0x%x\n",
2607 direntry, attrs->ia_valid);
2611 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
2612 attrs->ia_valid |= ATTR_FORCE;
2614 rc = setattr_prepare(&init_user_ns, direntry, attrs);
2618 full_path = build_path_from_dentry(direntry);
2619 if (full_path == NULL) {
2625 * Attempt to flush data before changing attributes. We need to do
2626 * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the
2627 * ownership or mode then we may also need to do this. Here, we take
2628 * the safe way out and just do the flush on all setattr requests. If
2629 * the flush returns error, store it to report later and continue.
2631 * BB: This should be smarter. Why bother flushing pages that
2632 * will be truncated anyway? Also, should we error out here if
2633 * the flush returns error?
2635 rc = filemap_write_and_wait(inode->i_mapping);
2636 if (is_interrupt_error(rc)) {
2641 mapping_set_error(inode->i_mapping, rc);
2644 if (attrs->ia_valid & ATTR_SIZE) {
2645 rc = cifs_set_file_size(inode, attrs, xid, full_path);
2650 /* skip mode change if it's just for clearing setuid/setgid */
2651 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
2652 attrs->ia_valid &= ~ATTR_MODE;
2654 args = kmalloc(sizeof(*args), GFP_KERNEL);
2660 /* set up the struct */
2661 if (attrs->ia_valid & ATTR_MODE)
2662 args->mode = attrs->ia_mode;
2664 args->mode = NO_CHANGE_64;
2666 if (attrs->ia_valid & ATTR_UID)
2667 args->uid = attrs->ia_uid;
2669 args->uid = INVALID_UID; /* no change */
2671 if (attrs->ia_valid & ATTR_GID)
2672 args->gid = attrs->ia_gid;
2674 args->gid = INVALID_GID; /* no change */
2676 if (attrs->ia_valid & ATTR_ATIME)
2677 args->atime = cifs_UnixTimeToNT(attrs->ia_atime);
2679 args->atime = NO_CHANGE_64;
2681 if (attrs->ia_valid & ATTR_MTIME)
2682 args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime);
2684 args->mtime = NO_CHANGE_64;
2686 if (attrs->ia_valid & ATTR_CTIME)
2687 args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime);
2689 args->ctime = NO_CHANGE_64;
2692 open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY);
2694 u16 nfid = open_file->fid.netfid;
2695 u32 npid = open_file->pid;
2696 pTcon = tlink_tcon(open_file->tlink);
2697 rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid);
2698 cifsFileInfo_put(open_file);
2700 tlink = cifs_sb_tlink(cifs_sb);
2701 if (IS_ERR(tlink)) {
2702 rc = PTR_ERR(tlink);
2705 pTcon = tlink_tcon(tlink);
2706 rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args,
2708 cifs_remap(cifs_sb));
2709 cifs_put_tlink(tlink);
2715 if ((attrs->ia_valid & ATTR_SIZE) &&
2716 attrs->ia_size != i_size_read(inode))
2717 truncate_setsize(inode, attrs->ia_size);
2719 setattr_copy(&init_user_ns, inode, attrs);
2720 mark_inode_dirty(inode);
2722 /* force revalidate when any of these times are set since some
2723 of the fs types (eg ext3, fat) do not have fine enough
2724 time granularity to match protocol, and we do not have a
2725 a way (yet) to query the server fs's time granularity (and
2726 whether it rounds times down).
2728 if (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME))
2729 cifsInode->time = 0;
2738 cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
2741 kuid_t uid = INVALID_UID;
2742 kgid_t gid = INVALID_GID;
2743 struct inode *inode = d_inode(direntry);
2744 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2745 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2746 struct cifsFileInfo *wfile;
2747 struct cifs_tcon *tcon;
2748 char *full_path = NULL;
2751 __u64 mode = NO_CHANGE_64;
2755 cifs_dbg(FYI, "setattr on file %pd attrs->ia_valid 0x%x\n",
2756 direntry, attrs->ia_valid);
2758 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
2759 attrs->ia_valid |= ATTR_FORCE;
2761 rc = setattr_prepare(&init_user_ns, direntry, attrs);
2767 full_path = build_path_from_dentry(direntry);
2768 if (full_path == NULL) {
2775 * Attempt to flush data before changing attributes. We need to do
2776 * this for ATTR_SIZE and ATTR_MTIME. If the flush of the data
2777 * returns error, store it to report later and continue.
2779 * BB: This should be smarter. Why bother flushing pages that
2780 * will be truncated anyway? Also, should we error out here if
2781 * the flush returns error? Do we need to check for ATTR_MTIME_SET flag?
2783 if (attrs->ia_valid & (ATTR_MTIME | ATTR_SIZE | ATTR_CTIME)) {
2784 rc = filemap_write_and_wait(inode->i_mapping);
2785 if (is_interrupt_error(rc)) {
2787 goto cifs_setattr_exit;
2789 mapping_set_error(inode->i_mapping, rc);
2794 if ((attrs->ia_valid & ATTR_MTIME) &&
2795 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) {
2796 rc = cifs_get_writable_file(cifsInode, FIND_WR_ANY, &wfile);
2798 tcon = tlink_tcon(wfile->tlink);
2799 rc = tcon->ses->server->ops->flush(xid, tcon, &wfile->fid);
2800 cifsFileInfo_put(wfile);
2802 goto cifs_setattr_exit;
2803 } else if (rc != -EBADF)
2804 goto cifs_setattr_exit;
2809 if (attrs->ia_valid & ATTR_SIZE) {
2810 rc = cifs_set_file_size(inode, attrs, xid, full_path);
2812 goto cifs_setattr_exit;
2815 if (attrs->ia_valid & ATTR_UID)
2816 uid = attrs->ia_uid;
2818 if (attrs->ia_valid & ATTR_GID)
2819 gid = attrs->ia_gid;
2821 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) ||
2822 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) {
2823 if (uid_valid(uid) || gid_valid(gid)) {
2824 mode = NO_CHANGE_64;
2825 rc = id_mode_to_cifs_acl(inode, full_path, &mode,
2828 cifs_dbg(FYI, "%s: Setting id failed with error: %d\n",
2830 goto cifs_setattr_exit;
2834 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID))
2835 attrs->ia_valid &= ~(ATTR_UID | ATTR_GID);
2837 /* skip mode change if it's just for clearing setuid/setgid */
2838 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
2839 attrs->ia_valid &= ~ATTR_MODE;
2841 if (attrs->ia_valid & ATTR_MODE) {
2842 mode = attrs->ia_mode;
2844 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) ||
2845 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) {
2846 rc = id_mode_to_cifs_acl(inode, full_path, &mode,
2847 INVALID_UID, INVALID_GID);
2849 cifs_dbg(FYI, "%s: Setting ACL failed with error: %d\n",
2851 goto cifs_setattr_exit;
2855 * In case of CIFS_MOUNT_CIFS_ACL, we cannot support all modes.
2856 * Pick up the actual mode bits that were set.
2858 if (mode != attrs->ia_mode)
2859 attrs->ia_mode = mode;
2861 if (((mode & S_IWUGO) == 0) &&
2862 (cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
2864 dosattr = cifsInode->cifsAttrs | ATTR_READONLY;
2866 /* fix up mode if we're not using dynperm */
2867 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
2868 attrs->ia_mode = inode->i_mode & ~S_IWUGO;
2869 } else if ((mode & S_IWUGO) &&
2870 (cifsInode->cifsAttrs & ATTR_READONLY)) {
2872 dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
2873 /* Attributes of 0 are ignored */
2875 dosattr |= ATTR_NORMAL;
2877 /* reset local inode permissions to normal */
2878 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2879 attrs->ia_mode &= ~(S_IALLUGO);
2880 if (S_ISDIR(inode->i_mode))
2882 cifs_sb->ctx->dir_mode;
2885 cifs_sb->ctx->file_mode;
2887 } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2888 /* ignore mode change - ATTR_READONLY hasn't changed */
2889 attrs->ia_valid &= ~ATTR_MODE;
2893 if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) ||
2894 ((attrs->ia_valid & ATTR_MODE) && dosattr)) {
2895 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
2896 /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */
2898 /* Even if error on time set, no sense failing the call if
2899 the server would set the time to a reasonable value anyway,
2900 and this check ensures that we are not being called from
2901 sys_utimes in which case we ought to fail the call back to
2902 the user when the server rejects the call */
2903 if ((rc) && (attrs->ia_valid &
2904 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
2908 /* do not need local check to inode_check_ok since the server does
2911 goto cifs_setattr_exit;
2913 if ((attrs->ia_valid & ATTR_SIZE) &&
2914 attrs->ia_size != i_size_read(inode))
2915 truncate_setsize(inode, attrs->ia_size);
2917 setattr_copy(&init_user_ns, inode, attrs);
2918 mark_inode_dirty(inode);
2927 cifs_setattr(struct user_namespace *mnt_userns, struct dentry *direntry,
2928 struct iattr *attrs)
2930 struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
2931 struct cifs_tcon *pTcon = cifs_sb_master_tcon(cifs_sb);
2932 int rc, retries = 0;
2935 if (pTcon->unix_ext)
2936 rc = cifs_setattr_unix(direntry, attrs);
2938 rc = cifs_setattr_nounix(direntry, attrs);
2940 } while (is_retryable_error(rc) && retries < 2);
2942 /* BB: add cifs_setattr_legacy for really old servers */
2947 void cifs_delete_inode(struct inode *inode)
2949 cifs_dbg(FYI, "In cifs_delete_inode, inode = 0x%p\n", inode);
2950 /* may have to add back in if and when safe distributed caching of
2951 directories added e.g. via FindNotify */