1 // SPDX-License-Identifier: LGPL-2.1
4 * Copyright (C) International Business Machines Corp., 2002,2010
5 * Author(s): Steve French (sfrench@us.ibm.com)
9 #include <linux/stat.h>
10 #include <linux/slab.h>
11 #include <linux/pagemap.h>
12 #include <linux/freezer.h>
13 #include <linux/sched/signal.h>
14 #include <linux/wait_bit.h>
15 #include <linux/fiemap.h>
16 #include <asm/div64.h>
20 #include "cifsproto.h"
21 #include "smb2proto.h"
22 #include "cifs_debug.h"
23 #include "cifs_fs_sb.h"
24 #include "cifs_unicode.h"
26 #include "fs_context.h"
27 #include "cifs_ioctl.h"
28 #include "cached_dir.h"
30 static void cifs_set_ops(struct inode *inode)
32 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
34 switch (inode->i_mode & S_IFMT) {
36 inode->i_op = &cifs_file_inode_ops;
37 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
38 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
39 inode->i_fop = &cifs_file_direct_nobrl_ops;
41 inode->i_fop = &cifs_file_direct_ops;
42 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) {
43 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
44 inode->i_fop = &cifs_file_strict_nobrl_ops;
46 inode->i_fop = &cifs_file_strict_ops;
47 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
48 inode->i_fop = &cifs_file_nobrl_ops;
49 else { /* not direct, send byte range locks */
50 inode->i_fop = &cifs_file_ops;
53 /* check if server can support readahead */
54 if (cifs_sb_master_tcon(cifs_sb)->ses->server->max_read <
55 PAGE_SIZE + MAX_CIFS_HDR_SIZE)
56 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
58 inode->i_data.a_ops = &cifs_addr_ops;
61 #ifdef CONFIG_CIFS_DFS_UPCALL
62 if (IS_AUTOMOUNT(inode)) {
63 inode->i_op = &cifs_dfs_referral_inode_operations;
65 #else /* NO DFS support, treat as a directory */
68 inode->i_op = &cifs_dir_inode_ops;
69 inode->i_fop = &cifs_dir_ops;
73 inode->i_op = &cifs_symlink_inode_ops;
76 init_special_inode(inode, inode->i_mode, inode->i_rdev);
81 /* check inode attributes against fattr. If they don't match, tag the
82 * inode for cache invalidation
85 cifs_revalidate_cache(struct inode *inode, struct cifs_fattr *fattr)
87 struct cifs_fscache_inode_coherency_data cd;
88 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
90 cifs_dbg(FYI, "%s: revalidating inode %llu\n",
91 __func__, cifs_i->uniqueid);
93 if (inode->i_state & I_NEW) {
94 cifs_dbg(FYI, "%s: inode %llu is new\n",
95 __func__, cifs_i->uniqueid);
99 /* don't bother with revalidation if we have an oplock */
100 if (CIFS_CACHE_READ(cifs_i)) {
101 cifs_dbg(FYI, "%s: inode %llu is oplocked\n",
102 __func__, cifs_i->uniqueid);
106 /* revalidate if mtime or size have changed */
107 fattr->cf_mtime = timestamp_truncate(fattr->cf_mtime, inode);
108 if (timespec64_equal(&inode->i_mtime, &fattr->cf_mtime) &&
109 cifs_i->server_eof == fattr->cf_eof) {
110 cifs_dbg(FYI, "%s: inode %llu is unchanged\n",
111 __func__, cifs_i->uniqueid);
115 cifs_dbg(FYI, "%s: invalidating inode %llu mapping\n",
116 __func__, cifs_i->uniqueid);
117 set_bit(CIFS_INO_INVALID_MAPPING, &cifs_i->flags);
118 /* Invalidate fscache cookie */
119 cifs_fscache_fill_coherency(&cifs_i->netfs.inode, &cd);
120 fscache_invalidate(cifs_inode_cookie(inode), &cd, i_size_read(inode), 0);
124 * copy nlink to the inode, unless it wasn't provided. Provide
125 * sane values if we don't have an existing one and none was provided
128 cifs_nlink_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr)
131 * if we're in a situation where we can't trust what we
132 * got from the server (readdir, some non-unix cases)
133 * fake reasonable values
135 if (fattr->cf_flags & CIFS_FATTR_UNKNOWN_NLINK) {
136 /* only provide fake values on a new inode */
137 if (inode->i_state & I_NEW) {
138 if (fattr->cf_cifsattrs & ATTR_DIRECTORY)
146 /* we trust the server, so update it */
147 set_nlink(inode, fattr->cf_nlink);
150 /* populate an inode with info from a cifs_fattr struct */
152 cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr)
154 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
155 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
157 if (!(inode->i_state & I_NEW) &&
158 unlikely(inode_wrong_type(inode, fattr->cf_mode))) {
159 CIFS_I(inode)->time = 0; /* force reval */
163 cifs_revalidate_cache(inode, fattr);
165 spin_lock(&inode->i_lock);
166 fattr->cf_mtime = timestamp_truncate(fattr->cf_mtime, inode);
167 fattr->cf_atime = timestamp_truncate(fattr->cf_atime, inode);
168 fattr->cf_ctime = timestamp_truncate(fattr->cf_ctime, inode);
169 /* we do not want atime to be less than mtime, it broke some apps */
170 if (timespec64_compare(&fattr->cf_atime, &fattr->cf_mtime) < 0)
171 inode->i_atime = fattr->cf_mtime;
173 inode->i_atime = fattr->cf_atime;
174 inode->i_mtime = fattr->cf_mtime;
175 inode->i_ctime = fattr->cf_ctime;
176 inode->i_rdev = fattr->cf_rdev;
177 cifs_nlink_fattr_to_inode(inode, fattr);
178 inode->i_uid = fattr->cf_uid;
179 inode->i_gid = fattr->cf_gid;
181 /* if dynperm is set, don't clobber existing mode */
182 if (inode->i_state & I_NEW ||
183 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM))
184 inode->i_mode = fattr->cf_mode;
186 cifs_i->cifsAttrs = fattr->cf_cifsattrs;
188 if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL)
191 cifs_i->time = jiffies;
193 if (fattr->cf_flags & CIFS_FATTR_DELETE_PENDING)
194 set_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags);
196 clear_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags);
198 cifs_i->server_eof = fattr->cf_eof;
200 * Can't safely change the file size here if the client is writing to
201 * it due to potential races.
203 if (is_size_safe_to_change(cifs_i, fattr->cf_eof)) {
204 i_size_write(inode, fattr->cf_eof);
207 * i_blocks is not related to (i_size / i_blksize),
208 * but instead 512 byte (2**9) size is required for
209 * calculating num blocks.
211 inode->i_blocks = (512 - 1 + fattr->cf_bytes) >> 9;
214 if (S_ISLNK(fattr->cf_mode)) {
215 kfree(cifs_i->symlink_target);
216 cifs_i->symlink_target = fattr->cf_symlink_target;
217 fattr->cf_symlink_target = NULL;
219 spin_unlock(&inode->i_lock);
221 if (fattr->cf_flags & CIFS_FATTR_DFS_REFERRAL)
222 inode->i_flags |= S_AUTOMOUNT;
223 if (inode->i_state & I_NEW)
229 cifs_fill_uniqueid(struct super_block *sb, struct cifs_fattr *fattr)
231 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
233 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
236 fattr->cf_uniqueid = iunique(sb, ROOT_I);
239 /* Fill a cifs_fattr struct with info from FILE_UNIX_BASIC_INFO. */
241 cifs_unix_basic_to_fattr(struct cifs_fattr *fattr, FILE_UNIX_BASIC_INFO *info,
242 struct cifs_sb_info *cifs_sb)
244 memset(fattr, 0, sizeof(*fattr));
245 fattr->cf_uniqueid = le64_to_cpu(info->UniqueId);
246 fattr->cf_bytes = le64_to_cpu(info->NumOfBytes);
247 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
249 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
250 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastModificationTime);
251 fattr->cf_ctime = cifs_NTtimeToUnix(info->LastStatusChange);
252 /* old POSIX extensions don't get create time */
254 fattr->cf_mode = le64_to_cpu(info->Permissions);
257 * Since we set the inode type below we need to mask off
258 * to avoid strange results if bits set above.
260 fattr->cf_mode &= ~S_IFMT;
261 switch (le32_to_cpu(info->Type)) {
263 fattr->cf_mode |= S_IFREG;
264 fattr->cf_dtype = DT_REG;
267 fattr->cf_mode |= S_IFLNK;
268 fattr->cf_dtype = DT_LNK;
271 fattr->cf_mode |= S_IFDIR;
272 fattr->cf_dtype = DT_DIR;
275 fattr->cf_mode |= S_IFCHR;
276 fattr->cf_dtype = DT_CHR;
277 fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor),
278 le64_to_cpu(info->DevMinor) & MINORMASK);
281 fattr->cf_mode |= S_IFBLK;
282 fattr->cf_dtype = DT_BLK;
283 fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor),
284 le64_to_cpu(info->DevMinor) & MINORMASK);
287 fattr->cf_mode |= S_IFIFO;
288 fattr->cf_dtype = DT_FIFO;
291 fattr->cf_mode |= S_IFSOCK;
292 fattr->cf_dtype = DT_SOCK;
295 /* safest to call it a file if we do not know */
296 fattr->cf_mode |= S_IFREG;
297 fattr->cf_dtype = DT_REG;
298 cifs_dbg(FYI, "unknown type %d\n", le32_to_cpu(info->Type));
302 fattr->cf_uid = cifs_sb->ctx->linux_uid;
303 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)) {
304 u64 id = le64_to_cpu(info->Uid);
305 if (id < ((uid_t)-1)) {
306 kuid_t uid = make_kuid(&init_user_ns, id);
312 fattr->cf_gid = cifs_sb->ctx->linux_gid;
313 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)) {
314 u64 id = le64_to_cpu(info->Gid);
315 if (id < ((gid_t)-1)) {
316 kgid_t gid = make_kgid(&init_user_ns, id);
322 fattr->cf_nlink = le64_to_cpu(info->Nlinks);
326 * Fill a cifs_fattr struct with fake inode info.
328 * Needed to setup cifs_fattr data for the directory which is the
329 * junction to the new submount (ie to setup the fake directory
330 * which represents a DFS referral).
333 cifs_create_dfs_fattr(struct cifs_fattr *fattr, struct super_block *sb)
335 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
337 cifs_dbg(FYI, "creating fake fattr for DFS referral\n");
339 memset(fattr, 0, sizeof(*fattr));
340 fattr->cf_mode = S_IFDIR | S_IXUGO | S_IRWXU;
341 fattr->cf_uid = cifs_sb->ctx->linux_uid;
342 fattr->cf_gid = cifs_sb->ctx->linux_gid;
343 ktime_get_coarse_real_ts64(&fattr->cf_mtime);
344 fattr->cf_atime = fattr->cf_ctime = fattr->cf_mtime;
346 fattr->cf_flags = CIFS_FATTR_DFS_REFERRAL;
349 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
351 cifs_get_file_info_unix(struct file *filp)
355 FILE_UNIX_BASIC_INFO find_data;
356 struct cifs_fattr fattr = {};
357 struct inode *inode = file_inode(filp);
358 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
359 struct cifsFileInfo *cfile = filp->private_data;
360 struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
364 if (cfile->symlink_target) {
365 fattr.cf_symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
366 if (!fattr.cf_symlink_target) {
368 goto cifs_gfiunix_out;
372 rc = CIFSSMBUnixQFileInfo(xid, tcon, cfile->fid.netfid, &find_data);
374 cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb);
375 } else if (rc == -EREMOTE) {
376 cifs_create_dfs_fattr(&fattr, inode->i_sb);
379 goto cifs_gfiunix_out;
381 rc = cifs_fattr_to_inode(inode, &fattr);
388 int cifs_get_inode_info_unix(struct inode **pinode,
389 const unsigned char *full_path,
390 struct super_block *sb, unsigned int xid)
393 FILE_UNIX_BASIC_INFO find_data;
394 struct cifs_fattr fattr;
395 struct cifs_tcon *tcon;
396 struct TCP_Server_Info *server;
397 struct tcon_link *tlink;
398 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
400 cifs_dbg(FYI, "Getting info on %s\n", full_path);
402 tlink = cifs_sb_tlink(cifs_sb);
404 return PTR_ERR(tlink);
405 tcon = tlink_tcon(tlink);
406 server = tcon->ses->server;
408 /* could have done a find first instead but this returns more info */
409 rc = CIFSSMBUnixQPathInfo(xid, tcon, full_path, &find_data,
410 cifs_sb->local_nls, cifs_remap(cifs_sb));
411 cifs_dbg(FYI, "%s: query path info: rc = %d\n", __func__, rc);
412 cifs_put_tlink(tlink);
415 cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb);
416 } else if (rc == -EREMOTE) {
417 cifs_create_dfs_fattr(&fattr, sb);
423 /* check for Minshall+French symlinks */
424 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
425 int tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr,
428 cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc);
431 if (S_ISLNK(fattr.cf_mode) && !fattr.cf_symlink_target) {
432 if (!server->ops->query_symlink)
434 rc = server->ops->query_symlink(xid, tcon, cifs_sb, full_path,
435 &fattr.cf_symlink_target, false);
437 cifs_dbg(FYI, "%s: query_symlink: %d\n", __func__, rc);
442 if (*pinode == NULL) {
444 cifs_fill_uniqueid(sb, &fattr);
445 *pinode = cifs_iget(sb, &fattr);
449 /* we already have inode, update it */
451 /* if uniqueid is different, return error */
452 if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM &&
453 CIFS_I(*pinode)->uniqueid != fattr.cf_uniqueid)) {
454 CIFS_I(*pinode)->time = 0; /* force reval */
459 /* if filetype is different, return error */
460 rc = cifs_fattr_to_inode(*pinode, &fattr);
464 kfree(fattr.cf_symlink_target);
468 int cifs_get_inode_info_unix(struct inode **pinode,
469 const unsigned char *full_path,
470 struct super_block *sb, unsigned int xid)
474 #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
477 cifs_sfu_type(struct cifs_fattr *fattr, const char *path,
478 struct cifs_sb_info *cifs_sb, unsigned int xid)
482 struct tcon_link *tlink;
483 struct cifs_tcon *tcon;
485 struct cifs_open_parms oparms;
486 struct cifs_io_parms io_parms = {0};
488 unsigned int bytes_read;
490 int buf_type = CIFS_NO_BUFFER;
494 fattr->cf_mode &= ~S_IFMT;
496 if (fattr->cf_eof == 0) {
497 fattr->cf_mode |= S_IFIFO;
498 fattr->cf_dtype = DT_FIFO;
500 } else if (fattr->cf_eof < 8) {
501 fattr->cf_mode |= S_IFREG;
502 fattr->cf_dtype = DT_REG;
503 return -EINVAL; /* EOPNOTSUPP? */
506 tlink = cifs_sb_tlink(cifs_sb);
508 return PTR_ERR(tlink);
509 tcon = tlink_tcon(tlink);
512 oparms.cifs_sb = cifs_sb;
513 oparms.desired_access = GENERIC_READ;
514 oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR);
515 oparms.disposition = FILE_OPEN;
518 oparms.reconnect = false;
520 if (tcon->ses->server->oplocks)
524 rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, NULL);
526 cifs_dbg(FYI, "check sfu type of %s, open rc = %d\n", path, rc);
527 cifs_put_tlink(tlink);
532 io_parms.netfid = fid.netfid;
533 io_parms.pid = current->tgid;
534 io_parms.tcon = tcon;
536 io_parms.length = 24;
538 rc = tcon->ses->server->ops->sync_read(xid, &fid, &io_parms,
539 &bytes_read, &pbuf, &buf_type);
540 if ((rc == 0) && (bytes_read >= 8)) {
541 if (memcmp("IntxBLK", pbuf, 8) == 0) {
542 cifs_dbg(FYI, "Block device\n");
543 fattr->cf_mode |= S_IFBLK;
544 fattr->cf_dtype = DT_BLK;
545 if (bytes_read == 24) {
546 /* we have enough to decode dev num */
547 __u64 mjr; /* major */
548 __u64 mnr; /* minor */
549 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
550 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
551 fattr->cf_rdev = MKDEV(mjr, mnr);
553 } else if (memcmp("IntxCHR", pbuf, 8) == 0) {
554 cifs_dbg(FYI, "Char device\n");
555 fattr->cf_mode |= S_IFCHR;
556 fattr->cf_dtype = DT_CHR;
557 if (bytes_read == 24) {
558 /* we have enough to decode dev num */
559 __u64 mjr; /* major */
560 __u64 mnr; /* minor */
561 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
562 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
563 fattr->cf_rdev = MKDEV(mjr, mnr);
565 } else if (memcmp("IntxLNK", pbuf, 7) == 0) {
566 cifs_dbg(FYI, "Symlink\n");
567 fattr->cf_mode |= S_IFLNK;
568 fattr->cf_dtype = DT_LNK;
570 fattr->cf_mode |= S_IFREG; /* file? */
571 fattr->cf_dtype = DT_REG;
575 fattr->cf_mode |= S_IFREG; /* then it is a file */
576 fattr->cf_dtype = DT_REG;
577 rc = -EOPNOTSUPP; /* or some unknown SFU type */
580 tcon->ses->server->ops->close(xid, tcon, &fid);
581 cifs_put_tlink(tlink);
585 #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
588 * Fetch mode bits as provided by SFU.
590 * FIXME: Doesn't this clobber the type bit we got from cifs_sfu_type ?
592 static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path,
593 struct cifs_sb_info *cifs_sb, unsigned int xid)
595 #ifdef CONFIG_CIFS_XATTR
599 struct tcon_link *tlink;
600 struct cifs_tcon *tcon;
602 tlink = cifs_sb_tlink(cifs_sb);
604 return PTR_ERR(tlink);
605 tcon = tlink_tcon(tlink);
607 if (tcon->ses->server->ops->query_all_EAs == NULL) {
608 cifs_put_tlink(tlink);
612 rc = tcon->ses->server->ops->query_all_EAs(xid, tcon, path,
613 "SETFILEBITS", ea_value, 4 /* size of buf */,
615 cifs_put_tlink(tlink);
619 mode = le32_to_cpu(*((__le32 *)ea_value));
620 fattr->cf_mode &= ~SFBITS_MASK;
621 cifs_dbg(FYI, "special bits 0%o org mode 0%o\n",
622 mode, fattr->cf_mode);
623 fattr->cf_mode = (mode & SFBITS_MASK) | fattr->cf_mode;
624 cifs_dbg(FYI, "special mode bits 0%o\n", mode);
633 /* Fill a cifs_fattr struct with info from POSIX info struct */
634 static void smb311_posix_info_to_fattr(struct cifs_fattr *fattr, struct cifs_open_info_data *data,
635 struct cifs_sid *owner,
636 struct cifs_sid *group,
637 struct super_block *sb, bool adjust_tz, bool symlink)
639 struct smb311_posix_qinfo *info = &data->posix_fi;
640 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
641 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
643 memset(fattr, 0, sizeof(*fattr));
645 /* no fattr->flags to set */
646 fattr->cf_cifsattrs = le32_to_cpu(info->DosAttributes);
647 fattr->cf_uniqueid = le64_to_cpu(info->Inode);
649 if (info->LastAccessTime)
650 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
652 ktime_get_coarse_real_ts64(&fattr->cf_atime);
654 fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime);
655 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);
658 fattr->cf_ctime.tv_sec += tcon->ses->server->timeAdj;
659 fattr->cf_mtime.tv_sec += tcon->ses->server->timeAdj;
662 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
663 fattr->cf_bytes = le64_to_cpu(info->AllocationSize);
664 fattr->cf_createtime = le64_to_cpu(info->CreationTime);
666 fattr->cf_nlink = le32_to_cpu(info->HardLinks);
667 fattr->cf_mode = (umode_t) le32_to_cpu(info->Mode);
668 /* The srv fs device id is overridden on network mount so setting rdev isn't needed here */
669 /* fattr->cf_rdev = le32_to_cpu(info->DeviceId); */
672 fattr->cf_mode |= S_IFLNK;
673 fattr->cf_dtype = DT_LNK;
674 fattr->cf_symlink_target = data->symlink_target;
675 data->symlink_target = NULL;
676 } else if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
677 fattr->cf_mode |= S_IFDIR;
678 fattr->cf_dtype = DT_DIR;
680 fattr->cf_mode |= S_IFREG;
681 fattr->cf_dtype = DT_REG;
683 /* else if reparse point ... TODO: add support for FIFO and blk dev; special file types */
685 sid_to_id(cifs_sb, owner, fattr, SIDOWNER);
686 sid_to_id(cifs_sb, group, fattr, SIDGROUP);
688 cifs_dbg(FYI, "POSIX query info: mode 0x%x uniqueid 0x%llx nlink %d\n",
689 fattr->cf_mode, fattr->cf_uniqueid, fattr->cf_nlink);
692 static void cifs_open_info_to_fattr(struct cifs_fattr *fattr, struct cifs_open_info_data *data,
693 struct super_block *sb, bool adjust_tz, bool symlink,
696 struct smb2_file_all_info *info = &data->fi;
697 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
698 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
700 memset(fattr, 0, sizeof(*fattr));
701 fattr->cf_cifsattrs = le32_to_cpu(info->Attributes);
702 if (info->DeletePending)
703 fattr->cf_flags |= CIFS_FATTR_DELETE_PENDING;
705 if (info->LastAccessTime)
706 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
708 ktime_get_coarse_real_ts64(&fattr->cf_atime);
710 fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime);
711 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);
714 fattr->cf_ctime.tv_sec += tcon->ses->server->timeAdj;
715 fattr->cf_mtime.tv_sec += tcon->ses->server->timeAdj;
718 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
719 fattr->cf_bytes = le64_to_cpu(info->AllocationSize);
720 fattr->cf_createtime = le64_to_cpu(info->CreationTime);
722 fattr->cf_nlink = le32_to_cpu(info->NumberOfLinks);
723 if (reparse_tag == IO_REPARSE_TAG_LX_SYMLINK) {
724 fattr->cf_mode |= S_IFLNK | cifs_sb->ctx->file_mode;
725 fattr->cf_dtype = DT_LNK;
726 } else if (reparse_tag == IO_REPARSE_TAG_LX_FIFO) {
727 fattr->cf_mode |= S_IFIFO | cifs_sb->ctx->file_mode;
728 fattr->cf_dtype = DT_FIFO;
729 } else if (reparse_tag == IO_REPARSE_TAG_AF_UNIX) {
730 fattr->cf_mode |= S_IFSOCK | cifs_sb->ctx->file_mode;
731 fattr->cf_dtype = DT_SOCK;
732 } else if (reparse_tag == IO_REPARSE_TAG_LX_CHR) {
733 fattr->cf_mode |= S_IFCHR | cifs_sb->ctx->file_mode;
734 fattr->cf_dtype = DT_CHR;
735 } else if (reparse_tag == IO_REPARSE_TAG_LX_BLK) {
736 fattr->cf_mode |= S_IFBLK | cifs_sb->ctx->file_mode;
737 fattr->cf_dtype = DT_BLK;
738 } else if (symlink || reparse_tag == IO_REPARSE_TAG_SYMLINK ||
739 reparse_tag == IO_REPARSE_TAG_NFS) {
740 fattr->cf_mode = S_IFLNK;
741 fattr->cf_dtype = DT_LNK;
742 } else if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
743 fattr->cf_mode = S_IFDIR | cifs_sb->ctx->dir_mode;
744 fattr->cf_dtype = DT_DIR;
746 * Server can return wrong NumberOfLinks value for directories
747 * when Unix extensions are disabled - fake it.
750 fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK;
752 fattr->cf_mode = S_IFREG | cifs_sb->ctx->file_mode;
753 fattr->cf_dtype = DT_REG;
755 /* clear write bits if ATTR_READONLY is set */
756 if (fattr->cf_cifsattrs & ATTR_READONLY)
757 fattr->cf_mode &= ~(S_IWUGO);
760 * Don't accept zero nlink from non-unix servers unless
761 * delete is pending. Instead mark it as unknown.
763 if ((fattr->cf_nlink < 1) && !tcon->unix_ext &&
764 !info->DeletePending) {
765 cifs_dbg(VFS, "bogus file nlink value %u\n",
767 fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK;
771 if (S_ISLNK(fattr->cf_mode)) {
772 fattr->cf_symlink_target = data->symlink_target;
773 data->symlink_target = NULL;
776 fattr->cf_uid = cifs_sb->ctx->linux_uid;
777 fattr->cf_gid = cifs_sb->ctx->linux_gid;
781 cifs_get_file_info(struct file *filp)
785 struct cifs_open_info_data data = {};
786 struct cifs_fattr fattr;
787 struct inode *inode = file_inode(filp);
788 struct cifsFileInfo *cfile = filp->private_data;
789 struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
790 struct TCP_Server_Info *server = tcon->ses->server;
791 bool symlink = false;
794 if (!server->ops->query_file_info)
798 rc = server->ops->query_file_info(xid, tcon, cfile, &data);
801 /* TODO: add support to query reparse tag */
802 if (data.symlink_target) {
804 tag = IO_REPARSE_TAG_SYMLINK;
806 cifs_open_info_to_fattr(&fattr, &data, inode->i_sb, false, symlink, tag);
809 cifs_create_dfs_fattr(&fattr, inode->i_sb);
815 * FIXME: legacy server -- fall back to path-based call?
816 * for now, just skip revalidating and mark inode for
820 CIFS_I(inode)->time = 0;
827 * don't bother with SFU junk here -- just mark inode as needing
830 fattr.cf_uniqueid = CIFS_I(inode)->uniqueid;
831 fattr.cf_flags |= CIFS_FATTR_NEED_REVAL;
832 /* if filetype is different, return error */
833 rc = cifs_fattr_to_inode(inode, &fattr);
835 cifs_free_open_info(&data);
840 /* Simple function to return a 64 bit hash of string. Rarely called */
841 static __u64 simple_hashstr(const char *str)
843 const __u64 hash_mult = 1125899906842597ULL; /* a big enough prime */
847 hash = (hash + (__u64) *str++) * hash_mult;
852 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
854 * cifs_backup_query_path_info - SMB1 fallback code to get ino
856 * Fallback code to get file metadata when we don't have access to
857 * full_path (EACCES) and have backup creds.
859 * @xid: transaction id used to identify original request in logs
860 * @tcon: information about the server share we have mounted
861 * @sb: the superblock stores info such as disk space available
862 * @full_path: name of the file we are getting the metadata for
863 * @resp_buf: will be set to cifs resp buf and needs to be freed with
864 * cifs_buf_release() when done with @data
865 * @data: will be set to search info result buffer
868 cifs_backup_query_path_info(int xid,
869 struct cifs_tcon *tcon,
870 struct super_block *sb,
871 const char *full_path,
873 FILE_ALL_INFO **data)
875 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
876 struct cifs_search_info info = {0};
881 info.endOfSearch = false;
883 info.info_level = SMB_FIND_FILE_UNIX;
884 else if ((tcon->ses->capabilities &
885 tcon->ses->server->vals->cap_nt_find) == 0)
886 info.info_level = SMB_FIND_FILE_INFO_STANDARD;
887 else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
888 info.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
889 else /* no srvino useful for fallback to some netapp */
890 info.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
892 flags = CIFS_SEARCH_CLOSE_ALWAYS |
893 CIFS_SEARCH_CLOSE_AT_END |
894 CIFS_SEARCH_BACKUP_SEARCH;
896 rc = CIFSFindFirst(xid, tcon, full_path,
897 cifs_sb, NULL, flags, &info, false);
901 *resp_buf = (void *)info.ntwrk_buf_start;
902 *data = (FILE_ALL_INFO *)info.srch_entries_start;
905 #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
907 static void cifs_set_fattr_ino(int xid, struct cifs_tcon *tcon, struct super_block *sb,
908 struct inode **inode, const char *full_path,
909 struct cifs_open_info_data *data, struct cifs_fattr *fattr)
911 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
912 struct TCP_Server_Info *server = tcon->ses->server;
915 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
917 fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid;
919 fattr->cf_uniqueid = iunique(sb, ROOT_I);
924 * If we have an inode pass a NULL tcon to ensure we don't
925 * make a round trip to the server. This only works for SMB2+.
927 rc = server->ops->get_srv_inum(xid, *inode ? NULL : tcon, cifs_sb, full_path,
928 &fattr->cf_uniqueid, data);
931 * If that fails reuse existing ino or generate one
932 * and disable server ones
935 fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid;
937 fattr->cf_uniqueid = iunique(sb, ROOT_I);
938 cifs_autodisable_serverino(cifs_sb);
943 /* If no errors, check for zero root inode (invalid) */
944 if (fattr->cf_uniqueid == 0 && strlen(full_path) == 0) {
945 cifs_dbg(FYI, "Invalid (0) inodenum\n");
948 fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid;
950 /* make an ino by hashing the UNC */
951 fattr->cf_flags |= CIFS_FATTR_FAKE_ROOT_INO;
952 fattr->cf_uniqueid = simple_hashstr(tcon->tree_name);
957 static inline bool is_inode_cache_good(struct inode *ino)
959 return ino && CIFS_CACHE_READ(CIFS_I(ino)) && CIFS_I(ino)->time != 0;
962 int cifs_get_inode_info(struct inode **inode, const char *full_path,
963 struct cifs_open_info_data *data, struct super_block *sb, int xid,
964 const struct cifs_fid *fid)
966 struct cifs_tcon *tcon;
967 struct TCP_Server_Info *server;
968 struct tcon_link *tlink;
969 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
970 bool adjust_tz = false;
971 struct cifs_fattr fattr = {0};
972 bool is_reparse_point = false;
973 struct cifs_open_info_data tmp_data = {};
974 void *smb1_backup_rsp_buf = NULL;
977 __u32 reparse_tag = 0;
979 tlink = cifs_sb_tlink(cifs_sb);
981 return PTR_ERR(tlink);
982 tcon = tlink_tcon(tlink);
983 server = tcon->ses->server;
986 * 1. Fetch file metadata if not provided (data)
990 if (is_inode_cache_good(*inode)) {
991 cifs_dbg(FYI, "No need to revalidate cached inode sizes\n");
994 rc = server->ops->query_path_info(xid, tcon, cifs_sb, full_path, &tmp_data,
995 &adjust_tz, &is_reparse_point);
1000 * 2. Convert it to internal cifs metadata (fattr)
1006 * If the file is a reparse point, it is more complicated
1007 * since we have to check if its reparse tag matches a known
1008 * special file type e.g. symlink or fifo or char etc.
1010 if (is_reparse_point && data->symlink_target) {
1011 reparse_tag = IO_REPARSE_TAG_SYMLINK;
1012 } else if ((le32_to_cpu(data->fi.Attributes) & ATTR_REPARSE) &&
1013 server->ops->query_reparse_tag) {
1014 tmprc = server->ops->query_reparse_tag(xid, tcon, cifs_sb, full_path,
1017 cifs_dbg(FYI, "%s: query_reparse_tag: rc = %d\n", __func__, tmprc);
1018 if (server->ops->query_symlink) {
1019 tmprc = server->ops->query_symlink(xid, tcon, cifs_sb, full_path,
1020 &data->symlink_target,
1023 cifs_dbg(FYI, "%s: query_symlink: rc = %d\n", __func__,
1027 cifs_open_info_to_fattr(&fattr, data, sb, adjust_tz, is_reparse_point, reparse_tag);
1030 /* DFS link, no metadata available on this server */
1031 cifs_create_dfs_fattr(&fattr, sb);
1035 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
1037 * perm errors, try again with backup flags if possible
1039 * For SMB2 and later the backup intent flag
1040 * is already sent if needed on open and there
1041 * is no path based FindFirst operation to use
1044 if (backup_cred(cifs_sb) && is_smb1_server(server)) {
1045 /* for easier reading */
1047 FILE_DIRECTORY_INFO *fdi;
1048 SEARCH_ID_FULL_DIR_INFO *si;
1050 rc = cifs_backup_query_path_info(xid, tcon, sb,
1052 &smb1_backup_rsp_buf,
1057 move_cifs_info_to_smb2(&data->fi, fi);
1058 fdi = (FILE_DIRECTORY_INFO *)fi;
1059 si = (SEARCH_ID_FULL_DIR_INFO *)fi;
1061 cifs_dir_info_to_fattr(&fattr, fdi, cifs_sb);
1062 fattr.cf_uniqueid = le64_to_cpu(si->UniqueId);
1063 /* uniqueid set, skip get inum step */
1064 goto handle_mnt_opt;
1066 /* nothing we can do, bail out */
1071 #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
1074 cifs_dbg(FYI, "%s: unhandled err rc %d\n", __func__, rc);
1079 * 3. Get or update inode number (fattr.cf_uniqueid)
1082 cifs_set_fattr_ino(xid, tcon, sb, inode, full_path, data, &fattr);
1085 * 4. Tweak fattr based on mount options
1087 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
1089 #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
1090 /* query for SFU type info if supported and needed */
1091 if (fattr.cf_cifsattrs & ATTR_SYSTEM &&
1092 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
1093 tmprc = cifs_sfu_type(&fattr, full_path, cifs_sb, xid);
1095 cifs_dbg(FYI, "cifs_sfu_type failed: %d\n", tmprc);
1098 /* fill in 0777 bits from ACL */
1099 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID) {
1100 rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, true,
1105 cifs_dbg(FYI, "%s: Get mode from SID failed. rc=%d\n",
1109 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
1110 rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, false,
1115 cifs_dbg(FYI, "%s: Getting ACL failed with error: %d\n",
1121 /* fill in remaining high mode bits e.g. SUID, VTX */
1122 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
1123 cifs_sfu_mode(&fattr, full_path, cifs_sb, xid);
1125 /* check for Minshall+French symlinks */
1126 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
1127 tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr,
1130 cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc);
1134 * 5. Update inode with final fattr data
1138 *inode = cifs_iget(sb, &fattr);
1142 /* we already have inode, update it */
1144 /* if uniqueid is different, return error */
1145 if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM &&
1146 CIFS_I(*inode)->uniqueid != fattr.cf_uniqueid)) {
1147 CIFS_I(*inode)->time = 0; /* force reval */
1151 /* if filetype is different, return error */
1152 rc = cifs_fattr_to_inode(*inode, &fattr);
1155 cifs_buf_release(smb1_backup_rsp_buf);
1156 cifs_put_tlink(tlink);
1157 cifs_free_open_info(&tmp_data);
1158 kfree(fattr.cf_symlink_target);
1163 smb311_posix_get_inode_info(struct inode **inode,
1164 const char *full_path,
1165 struct super_block *sb, unsigned int xid)
1167 struct cifs_tcon *tcon;
1168 struct tcon_link *tlink;
1169 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1170 bool adjust_tz = false;
1171 struct cifs_fattr fattr = {0};
1172 bool symlink = false;
1173 struct cifs_open_info_data data = {};
1174 struct cifs_sid owner, group;
1178 tlink = cifs_sb_tlink(cifs_sb);
1180 return PTR_ERR(tlink);
1181 tcon = tlink_tcon(tlink);
1184 * 1. Fetch file metadata
1187 if (is_inode_cache_good(*inode)) {
1188 cifs_dbg(FYI, "No need to revalidate cached inode sizes\n");
1192 rc = smb311_posix_query_path_info(xid, tcon, cifs_sb, full_path, &data,
1193 &owner, &group, &adjust_tz,
1197 * 2. Convert it to internal cifs metadata (fattr)
1202 smb311_posix_info_to_fattr(&fattr, &data, &owner, &group,
1203 sb, adjust_tz, symlink);
1206 /* DFS link, no metadata available on this server */
1207 cifs_create_dfs_fattr(&fattr, sb);
1212 * For SMB2 and later the backup intent flag
1213 * is already sent if needed on open and there
1214 * is no path based FindFirst operation to use
1215 * to retry with so nothing we can do, bail out
1219 cifs_dbg(FYI, "%s: unhandled err rc %d\n", __func__, rc);
1225 * 3. Tweak fattr based on mount options
1228 /* check for Minshall+French symlinks */
1229 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
1230 tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr,
1233 cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc);
1237 * 4. Update inode with final fattr data
1241 *inode = cifs_iget(sb, &fattr);
1245 /* we already have inode, update it */
1247 /* if uniqueid is different, return error */
1248 if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM &&
1249 CIFS_I(*inode)->uniqueid != fattr.cf_uniqueid)) {
1250 CIFS_I(*inode)->time = 0; /* force reval */
1255 /* if filetype is different, return error */
1256 rc = cifs_fattr_to_inode(*inode, &fattr);
1259 cifs_put_tlink(tlink);
1260 cifs_free_open_info(&data);
1261 kfree(fattr.cf_symlink_target);
1266 static const struct inode_operations cifs_ipc_inode_ops = {
1267 .lookup = cifs_lookup,
1271 cifs_find_inode(struct inode *inode, void *opaque)
1273 struct cifs_fattr *fattr = opaque;
1275 /* don't match inode with different uniqueid */
1276 if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid)
1279 /* use createtime like an i_generation field */
1280 if (CIFS_I(inode)->createtime != fattr->cf_createtime)
1283 /* don't match inode of different type */
1284 if (inode_wrong_type(inode, fattr->cf_mode))
1287 /* if it's not a directory or has no dentries, then flag it */
1288 if (S_ISDIR(inode->i_mode) && !hlist_empty(&inode->i_dentry))
1289 fattr->cf_flags |= CIFS_FATTR_INO_COLLISION;
1295 cifs_init_inode(struct inode *inode, void *opaque)
1297 struct cifs_fattr *fattr = opaque;
1299 CIFS_I(inode)->uniqueid = fattr->cf_uniqueid;
1300 CIFS_I(inode)->createtime = fattr->cf_createtime;
1305 * walk dentry list for an inode and report whether it has aliases that
1306 * are hashed. We use this to determine if a directory inode can actually
1310 inode_has_hashed_dentries(struct inode *inode)
1312 struct dentry *dentry;
1314 spin_lock(&inode->i_lock);
1315 hlist_for_each_entry(dentry, &inode->i_dentry, d_u.d_alias) {
1316 if (!d_unhashed(dentry) || IS_ROOT(dentry)) {
1317 spin_unlock(&inode->i_lock);
1321 spin_unlock(&inode->i_lock);
1325 /* Given fattrs, get a corresponding inode */
1327 cifs_iget(struct super_block *sb, struct cifs_fattr *fattr)
1330 struct inode *inode;
1333 cifs_dbg(FYI, "looking for uniqueid=%llu\n", fattr->cf_uniqueid);
1335 /* hash down to 32-bits on 32-bit arch */
1336 hash = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid);
1338 inode = iget5_locked(sb, hash, cifs_find_inode, cifs_init_inode, fattr);
1340 /* was there a potentially problematic inode collision? */
1341 if (fattr->cf_flags & CIFS_FATTR_INO_COLLISION) {
1342 fattr->cf_flags &= ~CIFS_FATTR_INO_COLLISION;
1344 if (inode_has_hashed_dentries(inode)) {
1345 cifs_autodisable_serverino(CIFS_SB(sb));
1347 fattr->cf_uniqueid = iunique(sb, ROOT_I);
1348 goto retry_iget5_locked;
1352 /* can't fail - see cifs_find_inode() */
1353 cifs_fattr_to_inode(inode, fattr);
1354 if (sb->s_flags & SB_NOATIME)
1355 inode->i_flags |= S_NOATIME | S_NOCMTIME;
1356 if (inode->i_state & I_NEW) {
1357 inode->i_ino = hash;
1358 cifs_fscache_get_inode_cookie(inode);
1359 unlock_new_inode(inode);
1366 /* gets root inode */
1367 struct inode *cifs_root_iget(struct super_block *sb)
1370 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1371 struct inode *inode = NULL;
1373 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
1377 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH)
1378 && cifs_sb->prepath) {
1379 len = strlen(cifs_sb->prepath);
1380 path = kzalloc(len + 2 /* leading sep + null */, GFP_KERNEL);
1382 return ERR_PTR(-ENOMEM);
1384 memcpy(path+1, cifs_sb->prepath, len);
1386 path = kstrdup("", GFP_KERNEL);
1388 return ERR_PTR(-ENOMEM);
1392 if (tcon->unix_ext) {
1393 rc = cifs_get_inode_info_unix(&inode, path, sb, xid);
1394 /* some servers mistakenly claim POSIX support */
1395 if (rc != -EOPNOTSUPP)
1397 cifs_dbg(VFS, "server does not support POSIX extensions\n");
1398 tcon->unix_ext = false;
1401 convert_delimiter(path, CIFS_DIR_SEP(cifs_sb));
1402 if (tcon->posix_extensions)
1403 rc = smb311_posix_get_inode_info(&inode, path, sb, xid);
1405 rc = cifs_get_inode_info(&inode, path, NULL, sb, xid, NULL);
1409 inode = ERR_PTR(rc);
1413 if (rc && tcon->pipe) {
1414 cifs_dbg(FYI, "ipc connection - fake read inode\n");
1415 spin_lock(&inode->i_lock);
1416 inode->i_mode |= S_IFDIR;
1417 set_nlink(inode, 2);
1418 inode->i_op = &cifs_ipc_inode_ops;
1419 inode->i_fop = &simple_dir_operations;
1420 inode->i_uid = cifs_sb->ctx->linux_uid;
1421 inode->i_gid = cifs_sb->ctx->linux_gid;
1422 spin_unlock(&inode->i_lock);
1425 inode = ERR_PTR(rc);
1435 cifs_set_file_info(struct inode *inode, struct iattr *attrs, unsigned int xid,
1436 const char *full_path, __u32 dosattr)
1438 bool set_time = false;
1439 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1440 struct TCP_Server_Info *server;
1441 FILE_BASIC_INFO info_buf;
1446 server = cifs_sb_master_tcon(cifs_sb)->ses->server;
1447 if (!server->ops->set_file_info)
1452 if (attrs->ia_valid & ATTR_ATIME) {
1454 info_buf.LastAccessTime =
1455 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1457 info_buf.LastAccessTime = 0;
1459 if (attrs->ia_valid & ATTR_MTIME) {
1461 info_buf.LastWriteTime =
1462 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1464 info_buf.LastWriteTime = 0;
1467 * Samba throws this field away, but windows may actually use it.
1468 * Do not set ctime unless other time stamps are changed explicitly
1469 * (i.e. by utimes()) since we would then have a mix of client and
1472 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1473 cifs_dbg(FYI, "CIFS - CTIME changed\n");
1474 info_buf.ChangeTime =
1475 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1477 info_buf.ChangeTime = 0;
1479 info_buf.CreationTime = 0; /* don't change */
1480 info_buf.Attributes = cpu_to_le32(dosattr);
1482 return server->ops->set_file_info(inode, full_path, &info_buf, xid);
1485 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
1487 * Open the given file (if it isn't already), set the DELETE_ON_CLOSE bit
1488 * and rename it to a random name that hopefully won't conflict with
1492 cifs_rename_pending_delete(const char *full_path, struct dentry *dentry,
1493 const unsigned int xid)
1497 struct cifs_fid fid;
1498 struct cifs_open_parms oparms;
1499 struct inode *inode = d_inode(dentry);
1500 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1501 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1502 struct tcon_link *tlink;
1503 struct cifs_tcon *tcon;
1504 __u32 dosattr, origattr;
1505 FILE_BASIC_INFO *info_buf = NULL;
1507 tlink = cifs_sb_tlink(cifs_sb);
1509 return PTR_ERR(tlink);
1510 tcon = tlink_tcon(tlink);
1513 * We cannot rename the file if the server doesn't support
1514 * CAP_INFOLEVEL_PASSTHRU
1516 if (!(tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)) {
1522 oparms.cifs_sb = cifs_sb;
1523 oparms.desired_access = DELETE | FILE_WRITE_ATTRIBUTES;
1524 oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR);
1525 oparms.disposition = FILE_OPEN;
1526 oparms.path = full_path;
1528 oparms.reconnect = false;
1530 rc = CIFS_open(xid, &oparms, &oplock, NULL);
1534 origattr = cifsInode->cifsAttrs;
1536 origattr |= ATTR_NORMAL;
1538 dosattr = origattr & ~ATTR_READONLY;
1540 dosattr |= ATTR_NORMAL;
1541 dosattr |= ATTR_HIDDEN;
1543 /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */
1544 if (dosattr != origattr) {
1545 info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL);
1546 if (info_buf == NULL) {
1550 info_buf->Attributes = cpu_to_le32(dosattr);
1551 rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid,
1553 /* although we would like to mark the file hidden
1554 if that fails we will still try to rename it */
1556 cifsInode->cifsAttrs = dosattr;
1558 dosattr = origattr; /* since not able to change them */
1561 /* rename the file */
1562 rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, NULL,
1564 cifs_remap(cifs_sb));
1570 /* try to set DELETE_ON_CLOSE */
1571 if (!test_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags)) {
1572 rc = CIFSSMBSetFileDisposition(xid, tcon, true, fid.netfid,
1575 * some samba versions return -ENOENT when we try to set the
1576 * file disposition here. Likely a samba bug, but work around
1577 * it for now. This means that some cifsXXX files may hang
1578 * around after they shouldn't.
1580 * BB: remove this hack after more servers have the fix
1588 set_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags);
1592 CIFSSMBClose(xid, tcon, fid.netfid);
1595 cifs_put_tlink(tlink);
1599 * reset everything back to the original state. Don't bother
1600 * dealing with errors here since we can't do anything about
1604 CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, dentry->d_name.name,
1605 cifs_sb->local_nls, cifs_remap(cifs_sb));
1607 if (dosattr != origattr) {
1608 info_buf->Attributes = cpu_to_le32(origattr);
1609 if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid,
1611 cifsInode->cifsAttrs = origattr;
1616 #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
1618 /* copied from fs/nfs/dir.c with small changes */
1620 cifs_drop_nlink(struct inode *inode)
1622 spin_lock(&inode->i_lock);
1623 if (inode->i_nlink > 0)
1625 spin_unlock(&inode->i_lock);
1629 * If d_inode(dentry) is null (usually meaning the cached dentry
1630 * is a negative dentry) then we would attempt a standard SMB delete, but
1631 * if that fails we can not attempt the fall back mechanisms on EACCES
1632 * but will return the EACCES to the caller. Note that the VFS does not call
1633 * unlink on negative dentries currently.
1635 int cifs_unlink(struct inode *dir, struct dentry *dentry)
1639 const char *full_path;
1641 struct inode *inode = d_inode(dentry);
1642 struct cifsInodeInfo *cifs_inode;
1643 struct super_block *sb = dir->i_sb;
1644 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1645 struct tcon_link *tlink;
1646 struct cifs_tcon *tcon;
1647 struct TCP_Server_Info *server;
1648 struct iattr *attrs = NULL;
1649 __u32 dosattr = 0, origattr = 0;
1651 cifs_dbg(FYI, "cifs_unlink, dir=0x%p, dentry=0x%p\n", dir, dentry);
1653 if (unlikely(cifs_forced_shutdown(cifs_sb)))
1656 tlink = cifs_sb_tlink(cifs_sb);
1658 return PTR_ERR(tlink);
1659 tcon = tlink_tcon(tlink);
1660 server = tcon->ses->server;
1663 page = alloc_dentry_path();
1665 if (tcon->nodelete) {
1670 /* Unlink can be called from rename so we can not take the
1671 * sb->s_vfs_rename_mutex here */
1672 full_path = build_path_from_dentry(dentry, page);
1673 if (IS_ERR(full_path)) {
1674 rc = PTR_ERR(full_path);
1678 cifs_close_deferred_file_under_dentry(tcon, full_path);
1679 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
1680 if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1681 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1682 rc = CIFSPOSIXDelFile(xid, tcon, full_path,
1683 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
1684 cifs_remap(cifs_sb));
1685 cifs_dbg(FYI, "posix del rc %d\n", rc);
1686 if ((rc == 0) || (rc == -ENOENT))
1687 goto psx_del_no_retry;
1689 #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
1692 if (!server->ops->unlink) {
1694 goto psx_del_no_retry;
1697 rc = server->ops->unlink(xid, tcon, full_path, cifs_sb);
1702 cifs_drop_nlink(inode);
1703 } else if (rc == -ENOENT) {
1705 } else if (rc == -EBUSY) {
1706 if (server->ops->rename_pending_delete) {
1707 rc = server->ops->rename_pending_delete(full_path,
1710 cifs_drop_nlink(inode);
1712 } else if ((rc == -EACCES) && (dosattr == 0) && inode) {
1713 attrs = kzalloc(sizeof(*attrs), GFP_KERNEL);
1714 if (attrs == NULL) {
1719 /* try to reset dos attributes */
1720 cifs_inode = CIFS_I(inode);
1721 origattr = cifs_inode->cifsAttrs;
1723 origattr |= ATTR_NORMAL;
1724 dosattr = origattr & ~ATTR_READONLY;
1726 dosattr |= ATTR_NORMAL;
1727 dosattr |= ATTR_HIDDEN;
1729 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
1733 goto retry_std_delete;
1736 /* undo the setattr if we errored out and it's needed */
1737 if (rc != 0 && dosattr != 0)
1738 cifs_set_file_info(inode, attrs, xid, full_path, origattr);
1742 cifs_inode = CIFS_I(inode);
1743 cifs_inode->time = 0; /* will force revalidate to get info
1745 inode->i_ctime = current_time(inode);
1747 dir->i_ctime = dir->i_mtime = current_time(dir);
1748 cifs_inode = CIFS_I(dir);
1749 CIFS_I(dir)->time = 0; /* force revalidate of dir as well */
1751 free_dentry_path(page);
1754 cifs_put_tlink(tlink);
1759 cifs_mkdir_qinfo(struct inode *parent, struct dentry *dentry, umode_t mode,
1760 const char *full_path, struct cifs_sb_info *cifs_sb,
1761 struct cifs_tcon *tcon, const unsigned int xid)
1764 struct inode *inode = NULL;
1766 if (tcon->posix_extensions)
1767 rc = smb311_posix_get_inode_info(&inode, full_path, parent->i_sb, xid);
1768 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
1769 else if (tcon->unix_ext)
1770 rc = cifs_get_inode_info_unix(&inode, full_path, parent->i_sb,
1772 #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
1774 rc = cifs_get_inode_info(&inode, full_path, NULL, parent->i_sb,
1780 if (!S_ISDIR(inode->i_mode)) {
1782 * mkdir succeeded, but another client has managed to remove the
1783 * sucker and replace it with non-directory. Return success,
1784 * but don't leave the child in dcache.
1791 * setting nlink not necessary except in cases where we failed to get it
1792 * from the server or was set bogus. Also, since this is a brand new
1793 * inode, no need to grab the i_lock before setting the i_nlink.
1795 if (inode->i_nlink < 2)
1796 set_nlink(inode, 2);
1797 mode &= ~current_umask();
1798 /* must turn on setgid bit if parent dir has it */
1799 if (parent->i_mode & S_ISGID)
1802 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
1803 if (tcon->unix_ext) {
1804 struct cifs_unix_set_info_args args = {
1806 .ctime = NO_CHANGE_64,
1807 .atime = NO_CHANGE_64,
1808 .mtime = NO_CHANGE_64,
1811 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1812 args.uid = current_fsuid();
1813 if (parent->i_mode & S_ISGID)
1814 args.gid = parent->i_gid;
1816 args.gid = current_fsgid();
1818 args.uid = INVALID_UID; /* no change */
1819 args.gid = INVALID_GID; /* no change */
1821 CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args,
1823 cifs_remap(cifs_sb));
1827 #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
1828 struct TCP_Server_Info *server = tcon->ses->server;
1829 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
1830 (mode & S_IWUGO) == 0 && server->ops->mkdir_setinfo)
1831 server->ops->mkdir_setinfo(inode, full_path, cifs_sb,
1833 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
1834 inode->i_mode = (mode | S_IFDIR);
1836 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1837 inode->i_uid = current_fsuid();
1838 if (inode->i_mode & S_ISGID)
1839 inode->i_gid = parent->i_gid;
1841 inode->i_gid = current_fsgid();
1844 d_instantiate(dentry, inode);
1848 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
1850 cifs_posix_mkdir(struct inode *inode, struct dentry *dentry, umode_t mode,
1851 const char *full_path, struct cifs_sb_info *cifs_sb,
1852 struct cifs_tcon *tcon, const unsigned int xid)
1856 FILE_UNIX_BASIC_INFO *info = NULL;
1857 struct inode *newinode = NULL;
1858 struct cifs_fattr fattr;
1860 info = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1863 goto posix_mkdir_out;
1866 mode &= ~current_umask();
1867 rc = CIFSPOSIXCreate(xid, tcon, SMB_O_DIRECTORY | SMB_O_CREAT, mode,
1868 NULL /* netfid */, info, &oplock, full_path,
1869 cifs_sb->local_nls, cifs_remap(cifs_sb));
1870 if (rc == -EOPNOTSUPP)
1871 goto posix_mkdir_out;
1873 cifs_dbg(FYI, "posix mkdir returned 0x%x\n", rc);
1875 goto posix_mkdir_out;
1878 if (info->Type == cpu_to_le32(-1))
1879 /* no return info, go query for it */
1880 goto posix_mkdir_get_info;
1882 * BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if
1883 * need to set uid/gid.
1886 cifs_unix_basic_to_fattr(&fattr, info, cifs_sb);
1887 cifs_fill_uniqueid(inode->i_sb, &fattr);
1888 newinode = cifs_iget(inode->i_sb, &fattr);
1890 goto posix_mkdir_get_info;
1892 d_instantiate(dentry, newinode);
1894 #ifdef CONFIG_CIFS_DEBUG2
1895 cifs_dbg(FYI, "instantiated dentry %p %pd to inode %p\n",
1896 dentry, dentry, newinode);
1898 if (newinode->i_nlink != 2)
1899 cifs_dbg(FYI, "unexpected number of links %d\n",
1906 posix_mkdir_get_info:
1907 rc = cifs_mkdir_qinfo(inode, dentry, mode, full_path, cifs_sb, tcon,
1909 goto posix_mkdir_out;
1911 #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
1913 int cifs_mkdir(struct mnt_idmap *idmap, struct inode *inode,
1914 struct dentry *direntry, umode_t mode)
1918 struct cifs_sb_info *cifs_sb;
1919 struct tcon_link *tlink;
1920 struct cifs_tcon *tcon;
1921 struct TCP_Server_Info *server;
1922 const char *full_path;
1925 cifs_dbg(FYI, "In cifs_mkdir, mode = %04ho inode = 0x%p\n",
1928 cifs_sb = CIFS_SB(inode->i_sb);
1929 if (unlikely(cifs_forced_shutdown(cifs_sb)))
1931 tlink = cifs_sb_tlink(cifs_sb);
1933 return PTR_ERR(tlink);
1934 tcon = tlink_tcon(tlink);
1938 page = alloc_dentry_path();
1939 full_path = build_path_from_dentry(direntry, page);
1940 if (IS_ERR(full_path)) {
1941 rc = PTR_ERR(full_path);
1945 server = tcon->ses->server;
1947 if ((server->ops->posix_mkdir) && (tcon->posix_extensions)) {
1948 rc = server->ops->posix_mkdir(xid, inode, mode, tcon, full_path,
1950 d_drop(direntry); /* for time being always refresh inode info */
1954 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
1955 if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1956 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1957 rc = cifs_posix_mkdir(inode, direntry, mode, full_path, cifs_sb,
1959 if (rc != -EOPNOTSUPP)
1962 #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
1964 if (!server->ops->mkdir) {
1969 /* BB add setting the equivalent of mode via CreateX w/ACLs */
1970 rc = server->ops->mkdir(xid, inode, mode, tcon, full_path, cifs_sb);
1972 cifs_dbg(FYI, "cifs_mkdir returned 0x%x\n", rc);
1977 /* TODO: skip this for smb2/smb3 */
1978 rc = cifs_mkdir_qinfo(inode, direntry, mode, full_path, cifs_sb, tcon,
1982 * Force revalidate to get parent dir info when needed since cached
1983 * attributes are invalid now.
1985 CIFS_I(inode)->time = 0;
1986 free_dentry_path(page);
1988 cifs_put_tlink(tlink);
1992 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1996 struct cifs_sb_info *cifs_sb;
1997 struct tcon_link *tlink;
1998 struct cifs_tcon *tcon;
1999 struct TCP_Server_Info *server;
2000 const char *full_path;
2001 void *page = alloc_dentry_path();
2002 struct cifsInodeInfo *cifsInode;
2004 cifs_dbg(FYI, "cifs_rmdir, inode = 0x%p\n", inode);
2008 full_path = build_path_from_dentry(direntry, page);
2009 if (IS_ERR(full_path)) {
2010 rc = PTR_ERR(full_path);
2014 cifs_sb = CIFS_SB(inode->i_sb);
2015 if (unlikely(cifs_forced_shutdown(cifs_sb))) {
2020 tlink = cifs_sb_tlink(cifs_sb);
2021 if (IS_ERR(tlink)) {
2022 rc = PTR_ERR(tlink);
2025 tcon = tlink_tcon(tlink);
2026 server = tcon->ses->server;
2028 if (!server->ops->rmdir) {
2030 cifs_put_tlink(tlink);
2034 if (tcon->nodelete) {
2036 cifs_put_tlink(tlink);
2040 rc = server->ops->rmdir(xid, tcon, full_path, cifs_sb);
2041 cifs_put_tlink(tlink);
2044 spin_lock(&d_inode(direntry)->i_lock);
2045 i_size_write(d_inode(direntry), 0);
2046 clear_nlink(d_inode(direntry));
2047 spin_unlock(&d_inode(direntry)->i_lock);
2050 cifsInode = CIFS_I(d_inode(direntry));
2051 /* force revalidate to go get info when needed */
2052 cifsInode->time = 0;
2054 cifsInode = CIFS_I(inode);
2056 * Force revalidate to get parent dir info when needed since cached
2057 * attributes are invalid now.
2059 cifsInode->time = 0;
2061 d_inode(direntry)->i_ctime = inode->i_ctime = inode->i_mtime =
2062 current_time(inode);
2065 free_dentry_path(page);
2071 cifs_do_rename(const unsigned int xid, struct dentry *from_dentry,
2072 const char *from_path, struct dentry *to_dentry,
2073 const char *to_path)
2075 struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb);
2076 struct tcon_link *tlink;
2077 struct cifs_tcon *tcon;
2078 struct TCP_Server_Info *server;
2079 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
2080 struct cifs_fid fid;
2081 struct cifs_open_parms oparms;
2083 #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
2086 tlink = cifs_sb_tlink(cifs_sb);
2088 return PTR_ERR(tlink);
2089 tcon = tlink_tcon(tlink);
2090 server = tcon->ses->server;
2092 if (!server->ops->rename)
2095 /* try path-based rename first */
2096 rc = server->ops->rename(xid, tcon, from_path, to_path, cifs_sb);
2099 * Don't bother with rename by filehandle unless file is busy and
2100 * source. Note that cross directory moves do not work with
2101 * rename by filehandle to various Windows servers.
2103 if (rc == 0 || rc != -EBUSY)
2104 goto do_rename_exit;
2106 /* Don't fall back to using SMB on SMB 2+ mount */
2107 if (server->vals->protocol_id != 0)
2108 goto do_rename_exit;
2110 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
2111 /* open-file renames don't work across directories */
2112 if (to_dentry->d_parent != from_dentry->d_parent)
2113 goto do_rename_exit;
2116 oparms.cifs_sb = cifs_sb;
2117 /* open the file to be renamed -- we need DELETE perms */
2118 oparms.desired_access = DELETE;
2119 oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR);
2120 oparms.disposition = FILE_OPEN;
2121 oparms.path = from_path;
2123 oparms.reconnect = false;
2125 rc = CIFS_open(xid, &oparms, &oplock, NULL);
2127 rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid,
2128 (const char *) to_dentry->d_name.name,
2129 cifs_sb->local_nls, cifs_remap(cifs_sb));
2130 CIFSSMBClose(xid, tcon, fid.netfid);
2132 #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
2135 d_move(from_dentry, to_dentry);
2136 cifs_put_tlink(tlink);
2141 cifs_rename2(struct mnt_idmap *idmap, struct inode *source_dir,
2142 struct dentry *source_dentry, struct inode *target_dir,
2143 struct dentry *target_dentry, unsigned int flags)
2145 const char *from_name, *to_name;
2146 void *page1, *page2;
2147 struct cifs_sb_info *cifs_sb;
2148 struct tcon_link *tlink;
2149 struct cifs_tcon *tcon;
2152 int retry_count = 0;
2153 FILE_UNIX_BASIC_INFO *info_buf_source = NULL;
2154 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
2155 FILE_UNIX_BASIC_INFO *info_buf_target;
2156 #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
2158 if (flags & ~RENAME_NOREPLACE)
2161 cifs_sb = CIFS_SB(source_dir->i_sb);
2162 if (unlikely(cifs_forced_shutdown(cifs_sb)))
2165 tlink = cifs_sb_tlink(cifs_sb);
2167 return PTR_ERR(tlink);
2168 tcon = tlink_tcon(tlink);
2170 page1 = alloc_dentry_path();
2171 page2 = alloc_dentry_path();
2174 from_name = build_path_from_dentry(source_dentry, page1);
2175 if (IS_ERR(from_name)) {
2176 rc = PTR_ERR(from_name);
2177 goto cifs_rename_exit;
2180 to_name = build_path_from_dentry(target_dentry, page2);
2181 if (IS_ERR(to_name)) {
2182 rc = PTR_ERR(to_name);
2183 goto cifs_rename_exit;
2186 cifs_close_deferred_file_under_dentry(tcon, from_name);
2187 if (d_inode(target_dentry) != NULL)
2188 cifs_close_deferred_file_under_dentry(tcon, to_name);
2190 rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry,
2193 if (rc == -EACCES) {
2194 while (retry_count < 3) {
2195 cifs_close_all_deferred_files(tcon);
2196 rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry,
2205 * No-replace is the natural behavior for CIFS, so skip unlink hacks.
2207 if (flags & RENAME_NOREPLACE)
2208 goto cifs_rename_exit;
2210 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
2211 if (rc == -EEXIST && tcon->unix_ext) {
2213 * Are src and dst hardlinks of same inode? We can only tell
2214 * with unix extensions enabled.
2217 kmalloc_array(2, sizeof(FILE_UNIX_BASIC_INFO),
2219 if (info_buf_source == NULL) {
2221 goto cifs_rename_exit;
2224 info_buf_target = info_buf_source + 1;
2225 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, from_name,
2228 cifs_remap(cifs_sb));
2232 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, to_name,
2235 cifs_remap(cifs_sb));
2237 if (tmprc == 0 && (info_buf_source->UniqueId ==
2238 info_buf_target->UniqueId)) {
2239 /* same file, POSIX says that this is a noop */
2241 goto cifs_rename_exit;
2245 * else ... BB we could add the same check for Windows by
2246 * checking the UniqueId via FILE_INTERNAL_INFO
2250 #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
2252 /* Try unlinking the target dentry if it's not negative */
2253 if (d_really_is_positive(target_dentry) && (rc == -EACCES || rc == -EEXIST)) {
2254 if (d_is_dir(target_dentry))
2255 tmprc = cifs_rmdir(target_dir, target_dentry);
2257 tmprc = cifs_unlink(target_dir, target_dentry);
2259 goto cifs_rename_exit;
2260 rc = cifs_do_rename(xid, source_dentry, from_name,
2261 target_dentry, to_name);
2264 /* force revalidate to go get info when needed */
2265 CIFS_I(source_dir)->time = CIFS_I(target_dir)->time = 0;
2267 source_dir->i_ctime = source_dir->i_mtime = target_dir->i_ctime =
2268 target_dir->i_mtime = current_time(source_dir);
2271 kfree(info_buf_source);
2272 free_dentry_path(page2);
2273 free_dentry_path(page1);
2275 cifs_put_tlink(tlink);
2280 cifs_dentry_needs_reval(struct dentry *dentry)
2282 struct inode *inode = d_inode(dentry);
2283 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2284 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2285 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
2286 struct cached_fid *cfid = NULL;
2288 if (cifs_i->time == 0)
2291 if (CIFS_CACHE_READ(cifs_i))
2294 if (!lookupCacheEnabled)
2297 if (!open_cached_dir_by_dentry(tcon, dentry->d_parent, &cfid)) {
2298 spin_lock(&cfid->fid_lock);
2299 if (cfid->time && cifs_i->time > cfid->time) {
2300 spin_unlock(&cfid->fid_lock);
2301 close_cached_dir(cfid);
2304 spin_unlock(&cfid->fid_lock);
2305 close_cached_dir(cfid);
2308 * depending on inode type, check if attribute caching disabled for
2309 * files or directories
2311 if (S_ISDIR(inode->i_mode)) {
2312 if (!cifs_sb->ctx->acdirmax)
2314 if (!time_in_range(jiffies, cifs_i->time,
2315 cifs_i->time + cifs_sb->ctx->acdirmax))
2318 if (!cifs_sb->ctx->acregmax)
2320 if (!time_in_range(jiffies, cifs_i->time,
2321 cifs_i->time + cifs_sb->ctx->acregmax))
2325 /* hardlinked files w/ noserverino get "special" treatment */
2326 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) &&
2327 S_ISREG(inode->i_mode) && inode->i_nlink != 1)
2334 * Zap the cache. Called when invalid_mapping flag is set.
2337 cifs_invalidate_mapping(struct inode *inode)
2341 if (inode->i_mapping && inode->i_mapping->nrpages != 0) {
2342 rc = invalidate_inode_pages2(inode->i_mapping);
2344 cifs_dbg(VFS, "%s: Could not invalidate inode %p\n",
2352 * cifs_wait_bit_killable - helper for functions that are sleeping on bit locks
2354 * @key: currently unused
2355 * @mode: the task state to sleep in
2358 cifs_wait_bit_killable(struct wait_bit_key *key, int mode)
2361 if (signal_pending_state(mode, current))
2362 return -ERESTARTSYS;
2367 cifs_revalidate_mapping(struct inode *inode)
2370 unsigned long *flags = &CIFS_I(inode)->flags;
2371 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2373 /* swapfiles are not supposed to be shared */
2374 if (IS_SWAPFILE(inode))
2377 rc = wait_on_bit_lock_action(flags, CIFS_INO_LOCK, cifs_wait_bit_killable,
2378 TASK_KILLABLE|TASK_FREEZABLE_UNSAFE);
2382 if (test_and_clear_bit(CIFS_INO_INVALID_MAPPING, flags)) {
2383 /* for cache=singleclient, do not invalidate */
2384 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RW_CACHE)
2385 goto skip_invalidate;
2387 rc = cifs_invalidate_mapping(inode);
2389 set_bit(CIFS_INO_INVALID_MAPPING, flags);
2393 clear_bit_unlock(CIFS_INO_LOCK, flags);
2394 smp_mb__after_atomic();
2395 wake_up_bit(flags, CIFS_INO_LOCK);
2401 cifs_zap_mapping(struct inode *inode)
2403 set_bit(CIFS_INO_INVALID_MAPPING, &CIFS_I(inode)->flags);
2404 return cifs_revalidate_mapping(inode);
2407 int cifs_revalidate_file_attr(struct file *filp)
2410 struct dentry *dentry = file_dentry(filp);
2411 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
2412 struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data;
2413 #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
2415 if (!cifs_dentry_needs_reval(dentry))
2418 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
2419 if (tlink_tcon(cfile->tlink)->unix_ext)
2420 rc = cifs_get_file_info_unix(filp);
2422 #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
2423 rc = cifs_get_file_info(filp);
2428 int cifs_revalidate_dentry_attr(struct dentry *dentry)
2432 struct inode *inode = d_inode(dentry);
2433 struct super_block *sb = dentry->d_sb;
2434 const char *full_path;
2441 if (!cifs_dentry_needs_reval(dentry))
2446 page = alloc_dentry_path();
2447 full_path = build_path_from_dentry(dentry, page);
2448 if (IS_ERR(full_path)) {
2449 rc = PTR_ERR(full_path);
2453 cifs_dbg(FYI, "Update attributes: %s inode 0x%p count %d dentry: 0x%p d_time %ld jiffies %ld\n",
2454 full_path, inode, inode->i_count.counter,
2455 dentry, cifs_get_time(dentry), jiffies);
2458 if (cifs_sb_master_tcon(CIFS_SB(sb))->posix_extensions)
2459 rc = smb311_posix_get_inode_info(&inode, full_path, sb, xid);
2460 else if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext)
2461 rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid);
2463 rc = cifs_get_inode_info(&inode, full_path, NULL, sb,
2465 if (rc == -EAGAIN && count++ < 10)
2468 free_dentry_path(page);
2474 int cifs_revalidate_file(struct file *filp)
2477 struct inode *inode = file_inode(filp);
2479 rc = cifs_revalidate_file_attr(filp);
2483 return cifs_revalidate_mapping(inode);
2486 /* revalidate a dentry's inode attributes */
2487 int cifs_revalidate_dentry(struct dentry *dentry)
2490 struct inode *inode = d_inode(dentry);
2492 rc = cifs_revalidate_dentry_attr(dentry);
2496 return cifs_revalidate_mapping(inode);
2499 int cifs_getattr(struct mnt_idmap *idmap, const struct path *path,
2500 struct kstat *stat, u32 request_mask, unsigned int flags)
2502 struct dentry *dentry = path->dentry;
2503 struct cifs_sb_info *cifs_sb = CIFS_SB(dentry->d_sb);
2504 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
2505 struct inode *inode = d_inode(dentry);
2508 if (unlikely(cifs_forced_shutdown(CIFS_SB(inode->i_sb))))
2512 * We need to be sure that all dirty pages are written and the server
2513 * has actual ctime, mtime and file length.
2515 if ((request_mask & (STATX_CTIME | STATX_MTIME | STATX_SIZE | STATX_BLOCKS)) &&
2516 !CIFS_CACHE_READ(CIFS_I(inode)) &&
2517 inode->i_mapping && inode->i_mapping->nrpages != 0) {
2518 rc = filemap_fdatawait(inode->i_mapping);
2520 mapping_set_error(inode->i_mapping, rc);
2525 if ((flags & AT_STATX_SYNC_TYPE) == AT_STATX_FORCE_SYNC)
2526 CIFS_I(inode)->time = 0; /* force revalidate */
2529 * If the caller doesn't require syncing, only sync if
2530 * necessary (e.g. due to earlier truncate or setattr
2531 * invalidating the cached metadata)
2533 if (((flags & AT_STATX_SYNC_TYPE) != AT_STATX_DONT_SYNC) ||
2534 (CIFS_I(inode)->time == 0)) {
2535 rc = cifs_revalidate_dentry_attr(dentry);
2540 generic_fillattr(&nop_mnt_idmap, inode, stat);
2541 stat->blksize = cifs_sb->ctx->bsize;
2542 stat->ino = CIFS_I(inode)->uniqueid;
2544 /* old CIFS Unix Extensions doesn't return create time */
2545 if (CIFS_I(inode)->createtime) {
2546 stat->result_mask |= STATX_BTIME;
2548 cifs_NTtimeToUnix(cpu_to_le64(CIFS_I(inode)->createtime));
2551 stat->attributes_mask |= (STATX_ATTR_COMPRESSED | STATX_ATTR_ENCRYPTED);
2552 if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_COMPRESSED)
2553 stat->attributes |= STATX_ATTR_COMPRESSED;
2554 if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_ENCRYPTED)
2555 stat->attributes |= STATX_ATTR_ENCRYPTED;
2558 * If on a multiuser mount without unix extensions or cifsacl being
2559 * enabled, and the admin hasn't overridden them, set the ownership
2560 * to the fsuid/fsgid of the current process.
2562 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) &&
2563 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
2565 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID))
2566 stat->uid = current_fsuid();
2567 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID))
2568 stat->gid = current_fsgid();
2573 int cifs_fiemap(struct inode *inode, struct fiemap_extent_info *fei, u64 start,
2576 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2577 struct cifs_sb_info *cifs_sb = CIFS_SB(cifs_i->netfs.inode.i_sb);
2578 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
2579 struct TCP_Server_Info *server = tcon->ses->server;
2580 struct cifsFileInfo *cfile;
2583 if (unlikely(cifs_forced_shutdown(cifs_sb)))
2587 * We need to be sure that all dirty pages are written as they
2588 * might fill holes on the server.
2590 if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
2591 inode->i_mapping->nrpages != 0) {
2592 rc = filemap_fdatawait(inode->i_mapping);
2594 mapping_set_error(inode->i_mapping, rc);
2599 cfile = find_readable_file(cifs_i, false);
2603 if (server->ops->fiemap) {
2604 rc = server->ops->fiemap(tcon, cfile, fei, start, len);
2605 cifsFileInfo_put(cfile);
2609 cifsFileInfo_put(cfile);
2613 int cifs_truncate_page(struct address_space *mapping, loff_t from)
2615 pgoff_t index = from >> PAGE_SHIFT;
2616 unsigned offset = from & (PAGE_SIZE - 1);
2620 page = grab_cache_page(mapping, index);
2624 zero_user_segment(page, offset, PAGE_SIZE);
2630 void cifs_setsize(struct inode *inode, loff_t offset)
2632 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2634 spin_lock(&inode->i_lock);
2635 i_size_write(inode, offset);
2636 spin_unlock(&inode->i_lock);
2638 /* Cached inode must be refreshed on truncate */
2640 truncate_pagecache(inode, offset);
2644 cifs_set_file_size(struct inode *inode, struct iattr *attrs,
2645 unsigned int xid, const char *full_path)
2648 struct cifsFileInfo *open_file;
2649 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2650 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2651 struct tcon_link *tlink = NULL;
2652 struct cifs_tcon *tcon = NULL;
2653 struct TCP_Server_Info *server;
2656 * To avoid spurious oplock breaks from server, in the case of
2657 * inodes that we already have open, avoid doing path based
2658 * setting of file size if we can do it by handle.
2659 * This keeps our caching token (oplock) and avoids timeouts
2660 * when the local oplock break takes longer to flush
2661 * writebehind data than the SMB timeout for the SetPathInfo
2662 * request would allow
2664 open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY);
2666 tcon = tlink_tcon(open_file->tlink);
2667 server = tcon->ses->server;
2668 if (server->ops->set_file_size)
2669 rc = server->ops->set_file_size(xid, tcon, open_file,
2670 attrs->ia_size, false);
2673 cifsFileInfo_put(open_file);
2674 cifs_dbg(FYI, "SetFSize for attrs rc = %d\n", rc);
2682 tlink = cifs_sb_tlink(cifs_sb);
2684 return PTR_ERR(tlink);
2685 tcon = tlink_tcon(tlink);
2686 server = tcon->ses->server;
2690 * Set file size by pathname rather than by handle either because no
2691 * valid, writeable file handle for it was found or because there was
2692 * an error setting it by handle.
2694 if (server->ops->set_path_size)
2695 rc = server->ops->set_path_size(xid, tcon, full_path,
2696 attrs->ia_size, cifs_sb, false);
2699 cifs_dbg(FYI, "SetEOF by path (setattrs) rc = %d\n", rc);
2702 cifs_put_tlink(tlink);
2706 cifsInode->server_eof = attrs->ia_size;
2707 cifs_setsize(inode, attrs->ia_size);
2709 * i_blocks is not related to (i_size / i_blksize), but instead
2710 * 512 byte (2**9) size is required for calculating num blocks.
2711 * Until we can query the server for actual allocation size,
2712 * this is best estimate we have for blocks allocated for a file
2713 * Number of blocks must be rounded up so size 1 is not 0 blocks
2715 inode->i_blocks = (512 - 1 + attrs->ia_size) >> 9;
2718 * The man page of truncate says if the size changed,
2719 * then the st_ctime and st_mtime fields for the file
2722 attrs->ia_ctime = attrs->ia_mtime = current_time(inode);
2723 attrs->ia_valid |= ATTR_CTIME | ATTR_MTIME;
2725 cifs_truncate_page(inode->i_mapping, inode->i_size);
2731 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
2733 cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
2737 const char *full_path;
2738 void *page = alloc_dentry_path();
2739 struct inode *inode = d_inode(direntry);
2740 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2741 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2742 struct tcon_link *tlink;
2743 struct cifs_tcon *pTcon;
2744 struct cifs_unix_set_info_args *args = NULL;
2745 struct cifsFileInfo *open_file;
2747 cifs_dbg(FYI, "setattr_unix on file %pd attrs->ia_valid=0x%x\n",
2748 direntry, attrs->ia_valid);
2752 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
2753 attrs->ia_valid |= ATTR_FORCE;
2755 rc = setattr_prepare(&nop_mnt_idmap, direntry, attrs);
2759 full_path = build_path_from_dentry(direntry, page);
2760 if (IS_ERR(full_path)) {
2761 rc = PTR_ERR(full_path);
2766 * Attempt to flush data before changing attributes. We need to do
2767 * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the
2768 * ownership or mode then we may also need to do this. Here, we take
2769 * the safe way out and just do the flush on all setattr requests. If
2770 * the flush returns error, store it to report later and continue.
2772 * BB: This should be smarter. Why bother flushing pages that
2773 * will be truncated anyway? Also, should we error out here if
2774 * the flush returns error?
2776 rc = filemap_write_and_wait(inode->i_mapping);
2777 if (is_interrupt_error(rc)) {
2782 mapping_set_error(inode->i_mapping, rc);
2785 if (attrs->ia_valid & ATTR_SIZE) {
2786 rc = cifs_set_file_size(inode, attrs, xid, full_path);
2791 /* skip mode change if it's just for clearing setuid/setgid */
2792 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
2793 attrs->ia_valid &= ~ATTR_MODE;
2795 args = kmalloc(sizeof(*args), GFP_KERNEL);
2801 /* set up the struct */
2802 if (attrs->ia_valid & ATTR_MODE)
2803 args->mode = attrs->ia_mode;
2805 args->mode = NO_CHANGE_64;
2807 if (attrs->ia_valid & ATTR_UID)
2808 args->uid = attrs->ia_uid;
2810 args->uid = INVALID_UID; /* no change */
2812 if (attrs->ia_valid & ATTR_GID)
2813 args->gid = attrs->ia_gid;
2815 args->gid = INVALID_GID; /* no change */
2817 if (attrs->ia_valid & ATTR_ATIME)
2818 args->atime = cifs_UnixTimeToNT(attrs->ia_atime);
2820 args->atime = NO_CHANGE_64;
2822 if (attrs->ia_valid & ATTR_MTIME)
2823 args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime);
2825 args->mtime = NO_CHANGE_64;
2827 if (attrs->ia_valid & ATTR_CTIME)
2828 args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime);
2830 args->ctime = NO_CHANGE_64;
2833 open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY);
2835 u16 nfid = open_file->fid.netfid;
2836 u32 npid = open_file->pid;
2837 pTcon = tlink_tcon(open_file->tlink);
2838 rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid);
2839 cifsFileInfo_put(open_file);
2841 tlink = cifs_sb_tlink(cifs_sb);
2842 if (IS_ERR(tlink)) {
2843 rc = PTR_ERR(tlink);
2846 pTcon = tlink_tcon(tlink);
2847 rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args,
2849 cifs_remap(cifs_sb));
2850 cifs_put_tlink(tlink);
2856 if ((attrs->ia_valid & ATTR_SIZE) &&
2857 attrs->ia_size != i_size_read(inode)) {
2858 truncate_setsize(inode, attrs->ia_size);
2859 fscache_resize_cookie(cifs_inode_cookie(inode), attrs->ia_size);
2862 setattr_copy(&nop_mnt_idmap, inode, attrs);
2863 mark_inode_dirty(inode);
2865 /* force revalidate when any of these times are set since some
2866 of the fs types (eg ext3, fat) do not have fine enough
2867 time granularity to match protocol, and we do not have a
2868 a way (yet) to query the server fs's time granularity (and
2869 whether it rounds times down).
2871 if (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME))
2872 cifsInode->time = 0;
2875 free_dentry_path(page);
2879 #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
2882 cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
2885 kuid_t uid = INVALID_UID;
2886 kgid_t gid = INVALID_GID;
2887 struct inode *inode = d_inode(direntry);
2888 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2889 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2890 struct cifsFileInfo *wfile;
2891 struct cifs_tcon *tcon;
2892 const char *full_path;
2893 void *page = alloc_dentry_path();
2896 __u64 mode = NO_CHANGE_64;
2900 cifs_dbg(FYI, "setattr on file %pd attrs->ia_valid 0x%x\n",
2901 direntry, attrs->ia_valid);
2903 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
2904 attrs->ia_valid |= ATTR_FORCE;
2906 rc = setattr_prepare(&nop_mnt_idmap, direntry, attrs);
2908 goto cifs_setattr_exit;
2910 full_path = build_path_from_dentry(direntry, page);
2911 if (IS_ERR(full_path)) {
2912 rc = PTR_ERR(full_path);
2913 goto cifs_setattr_exit;
2917 * Attempt to flush data before changing attributes. We need to do
2918 * this for ATTR_SIZE and ATTR_MTIME. If the flush of the data
2919 * returns error, store it to report later and continue.
2921 * BB: This should be smarter. Why bother flushing pages that
2922 * will be truncated anyway? Also, should we error out here if
2923 * the flush returns error? Do we need to check for ATTR_MTIME_SET flag?
2925 if (attrs->ia_valid & (ATTR_MTIME | ATTR_SIZE | ATTR_CTIME)) {
2926 rc = filemap_write_and_wait(inode->i_mapping);
2927 if (is_interrupt_error(rc)) {
2929 goto cifs_setattr_exit;
2931 mapping_set_error(inode->i_mapping, rc);
2936 if ((attrs->ia_valid & ATTR_MTIME) &&
2937 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) {
2938 rc = cifs_get_writable_file(cifsInode, FIND_WR_ANY, &wfile);
2940 tcon = tlink_tcon(wfile->tlink);
2941 rc = tcon->ses->server->ops->flush(xid, tcon, &wfile->fid);
2942 cifsFileInfo_put(wfile);
2944 goto cifs_setattr_exit;
2945 } else if (rc != -EBADF)
2946 goto cifs_setattr_exit;
2951 if (attrs->ia_valid & ATTR_SIZE) {
2952 rc = cifs_set_file_size(inode, attrs, xid, full_path);
2954 goto cifs_setattr_exit;
2957 if (attrs->ia_valid & ATTR_UID)
2958 uid = attrs->ia_uid;
2960 if (attrs->ia_valid & ATTR_GID)
2961 gid = attrs->ia_gid;
2963 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) ||
2964 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) {
2965 if (uid_valid(uid) || gid_valid(gid)) {
2966 mode = NO_CHANGE_64;
2967 rc = id_mode_to_cifs_acl(inode, full_path, &mode,
2970 cifs_dbg(FYI, "%s: Setting id failed with error: %d\n",
2972 goto cifs_setattr_exit;
2976 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID))
2977 attrs->ia_valid &= ~(ATTR_UID | ATTR_GID);
2979 /* skip mode change if it's just for clearing setuid/setgid */
2980 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
2981 attrs->ia_valid &= ~ATTR_MODE;
2983 if (attrs->ia_valid & ATTR_MODE) {
2984 mode = attrs->ia_mode;
2986 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) ||
2987 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) {
2988 rc = id_mode_to_cifs_acl(inode, full_path, &mode,
2989 INVALID_UID, INVALID_GID);
2991 cifs_dbg(FYI, "%s: Setting ACL failed with error: %d\n",
2993 goto cifs_setattr_exit;
2997 * In case of CIFS_MOUNT_CIFS_ACL, we cannot support all modes.
2998 * Pick up the actual mode bits that were set.
3000 if (mode != attrs->ia_mode)
3001 attrs->ia_mode = mode;
3003 if (((mode & S_IWUGO) == 0) &&
3004 (cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
3006 dosattr = cifsInode->cifsAttrs | ATTR_READONLY;
3008 /* fix up mode if we're not using dynperm */
3009 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
3010 attrs->ia_mode = inode->i_mode & ~S_IWUGO;
3011 } else if ((mode & S_IWUGO) &&
3012 (cifsInode->cifsAttrs & ATTR_READONLY)) {
3014 dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
3015 /* Attributes of 0 are ignored */
3017 dosattr |= ATTR_NORMAL;
3019 /* reset local inode permissions to normal */
3020 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
3021 attrs->ia_mode &= ~(S_IALLUGO);
3022 if (S_ISDIR(inode->i_mode))
3024 cifs_sb->ctx->dir_mode;
3027 cifs_sb->ctx->file_mode;
3029 } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
3030 /* ignore mode change - ATTR_READONLY hasn't changed */
3031 attrs->ia_valid &= ~ATTR_MODE;
3035 if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) ||
3036 ((attrs->ia_valid & ATTR_MODE) && dosattr)) {
3037 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
3038 /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */
3040 /* Even if error on time set, no sense failing the call if
3041 the server would set the time to a reasonable value anyway,
3042 and this check ensures that we are not being called from
3043 sys_utimes in which case we ought to fail the call back to
3044 the user when the server rejects the call */
3045 if ((rc) && (attrs->ia_valid &
3046 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
3050 /* do not need local check to inode_check_ok since the server does
3053 goto cifs_setattr_exit;
3055 if ((attrs->ia_valid & ATTR_SIZE) &&
3056 attrs->ia_size != i_size_read(inode)) {
3057 truncate_setsize(inode, attrs->ia_size);
3058 fscache_resize_cookie(cifs_inode_cookie(inode), attrs->ia_size);
3061 setattr_copy(&nop_mnt_idmap, inode, attrs);
3062 mark_inode_dirty(inode);
3066 free_dentry_path(page);
3071 cifs_setattr(struct mnt_idmap *idmap, struct dentry *direntry,
3072 struct iattr *attrs)
3074 struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
3075 int rc, retries = 0;
3076 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
3077 struct cifs_tcon *pTcon = cifs_sb_master_tcon(cifs_sb);
3078 #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
3080 if (unlikely(cifs_forced_shutdown(cifs_sb)))
3084 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
3085 if (pTcon->unix_ext)
3086 rc = cifs_setattr_unix(direntry, attrs);
3088 #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
3089 rc = cifs_setattr_nounix(direntry, attrs);
3091 } while (is_retryable_error(rc) && retries < 2);
3093 /* BB: add cifs_setattr_legacy for really old servers */