4 * Copyright (C) International Business Machines Corp., 2002,2010
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>
29 #include <asm/div64.h>
33 #include "cifsproto.h"
34 #include "cifs_debug.h"
35 #include "cifs_fs_sb.h"
36 #include "cifs_unicode.h"
40 static void cifs_set_ops(struct inode *inode)
42 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
44 switch (inode->i_mode & S_IFMT) {
46 inode->i_op = &cifs_file_inode_ops;
47 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
48 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
49 inode->i_fop = &cifs_file_direct_nobrl_ops;
51 inode->i_fop = &cifs_file_direct_ops;
52 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) {
53 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
54 inode->i_fop = &cifs_file_strict_nobrl_ops;
56 inode->i_fop = &cifs_file_strict_ops;
57 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
58 inode->i_fop = &cifs_file_nobrl_ops;
59 else { /* not direct, send byte range locks */
60 inode->i_fop = &cifs_file_ops;
63 /* check if server can support readpages */
64 if (cifs_sb_master_tcon(cifs_sb)->ses->server->maxBuf <
65 PAGE_SIZE + MAX_CIFS_HDR_SIZE)
66 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
68 inode->i_data.a_ops = &cifs_addr_ops;
71 #ifdef CONFIG_CIFS_DFS_UPCALL
72 if (IS_AUTOMOUNT(inode)) {
73 inode->i_op = &cifs_dfs_referral_inode_operations;
75 #else /* NO DFS support, treat as a directory */
78 inode->i_op = &cifs_dir_inode_ops;
79 inode->i_fop = &cifs_dir_ops;
83 inode->i_op = &cifs_symlink_inode_ops;
86 init_special_inode(inode, inode->i_mode, inode->i_rdev);
91 /* check inode attributes against fattr. If they don't match, tag the
92 * inode for cache invalidation
95 cifs_revalidate_cache(struct inode *inode, struct cifs_fattr *fattr)
97 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
99 cifs_dbg(FYI, "%s: revalidating inode %llu\n",
100 __func__, cifs_i->uniqueid);
102 if (inode->i_state & I_NEW) {
103 cifs_dbg(FYI, "%s: inode %llu is new\n",
104 __func__, cifs_i->uniqueid);
108 /* don't bother with revalidation if we have an oplock */
109 if (CIFS_CACHE_READ(cifs_i)) {
110 cifs_dbg(FYI, "%s: inode %llu is oplocked\n",
111 __func__, cifs_i->uniqueid);
115 /* revalidate if mtime or size have changed */
116 if (timespec64_equal(&inode->i_mtime, &fattr->cf_mtime) &&
117 cifs_i->server_eof == fattr->cf_eof) {
118 cifs_dbg(FYI, "%s: inode %llu is unchanged\n",
119 __func__, cifs_i->uniqueid);
123 cifs_dbg(FYI, "%s: invalidating inode %llu mapping\n",
124 __func__, cifs_i->uniqueid);
125 set_bit(CIFS_INO_INVALID_MAPPING, &cifs_i->flags);
129 * copy nlink to the inode, unless it wasn't provided. Provide
130 * sane values if we don't have an existing one and none was provided
133 cifs_nlink_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr)
136 * if we're in a situation where we can't trust what we
137 * got from the server (readdir, some non-unix cases)
138 * fake reasonable values
140 if (fattr->cf_flags & CIFS_FATTR_UNKNOWN_NLINK) {
141 /* only provide fake values on a new inode */
142 if (inode->i_state & I_NEW) {
143 if (fattr->cf_cifsattrs & ATTR_DIRECTORY)
151 /* we trust the server, so update it */
152 set_nlink(inode, fattr->cf_nlink);
155 /* populate an inode with info from a cifs_fattr struct */
157 cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr)
159 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
160 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
162 cifs_revalidate_cache(inode, fattr);
164 spin_lock(&inode->i_lock);
165 /* we do not want atime to be less than mtime, it broke some apps */
166 if (timespec64_compare(&fattr->cf_atime, &fattr->cf_mtime) < 0)
167 inode->i_atime = fattr->cf_mtime;
169 inode->i_atime = fattr->cf_atime;
170 inode->i_mtime = fattr->cf_mtime;
171 inode->i_ctime = fattr->cf_ctime;
172 inode->i_rdev = fattr->cf_rdev;
173 cifs_nlink_fattr_to_inode(inode, fattr);
174 inode->i_uid = fattr->cf_uid;
175 inode->i_gid = fattr->cf_gid;
177 /* if dynperm is set, don't clobber existing mode */
178 if (inode->i_state & I_NEW ||
179 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM))
180 inode->i_mode = fattr->cf_mode;
182 cifs_i->cifsAttrs = fattr->cf_cifsattrs;
184 if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL)
187 cifs_i->time = jiffies;
189 if (fattr->cf_flags & CIFS_FATTR_DELETE_PENDING)
190 set_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags);
192 clear_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags);
194 cifs_i->server_eof = fattr->cf_eof;
196 * Can't safely change the file size here if the client is writing to
197 * it due to potential races.
199 if (is_size_safe_to_change(cifs_i, fattr->cf_eof)) {
200 i_size_write(inode, fattr->cf_eof);
203 * i_blocks is not related to (i_size / i_blksize),
204 * but instead 512 byte (2**9) size is required for
205 * calculating num blocks.
207 inode->i_blocks = (512 - 1 + fattr->cf_bytes) >> 9;
209 spin_unlock(&inode->i_lock);
211 if (fattr->cf_flags & CIFS_FATTR_DFS_REFERRAL)
212 inode->i_flags |= S_AUTOMOUNT;
213 if (inode->i_state & I_NEW)
218 cifs_fill_uniqueid(struct super_block *sb, struct cifs_fattr *fattr)
220 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
222 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
225 fattr->cf_uniqueid = iunique(sb, ROOT_I);
228 /* Fill a cifs_fattr struct with info from FILE_UNIX_BASIC_INFO. */
230 cifs_unix_basic_to_fattr(struct cifs_fattr *fattr, FILE_UNIX_BASIC_INFO *info,
231 struct cifs_sb_info *cifs_sb)
233 memset(fattr, 0, sizeof(*fattr));
234 fattr->cf_uniqueid = le64_to_cpu(info->UniqueId);
235 fattr->cf_bytes = le64_to_cpu(info->NumOfBytes);
236 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
238 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
239 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastModificationTime);
240 fattr->cf_ctime = cifs_NTtimeToUnix(info->LastStatusChange);
241 /* old POSIX extensions don't get create time */
243 fattr->cf_mode = le64_to_cpu(info->Permissions);
246 * Since we set the inode type below we need to mask off
247 * to avoid strange results if bits set above.
249 fattr->cf_mode &= ~S_IFMT;
250 switch (le32_to_cpu(info->Type)) {
252 fattr->cf_mode |= S_IFREG;
253 fattr->cf_dtype = DT_REG;
256 fattr->cf_mode |= S_IFLNK;
257 fattr->cf_dtype = DT_LNK;
260 fattr->cf_mode |= S_IFDIR;
261 fattr->cf_dtype = DT_DIR;
264 fattr->cf_mode |= S_IFCHR;
265 fattr->cf_dtype = DT_CHR;
266 fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor),
267 le64_to_cpu(info->DevMinor) & MINORMASK);
270 fattr->cf_mode |= S_IFBLK;
271 fattr->cf_dtype = DT_BLK;
272 fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor),
273 le64_to_cpu(info->DevMinor) & MINORMASK);
276 fattr->cf_mode |= S_IFIFO;
277 fattr->cf_dtype = DT_FIFO;
280 fattr->cf_mode |= S_IFSOCK;
281 fattr->cf_dtype = DT_SOCK;
284 /* safest to call it a file if we do not know */
285 fattr->cf_mode |= S_IFREG;
286 fattr->cf_dtype = DT_REG;
287 cifs_dbg(FYI, "unknown type %d\n", le32_to_cpu(info->Type));
291 fattr->cf_uid = cifs_sb->mnt_uid;
292 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)) {
293 u64 id = le64_to_cpu(info->Uid);
294 if (id < ((uid_t)-1)) {
295 kuid_t uid = make_kuid(&init_user_ns, id);
301 fattr->cf_gid = cifs_sb->mnt_gid;
302 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)) {
303 u64 id = le64_to_cpu(info->Gid);
304 if (id < ((gid_t)-1)) {
305 kgid_t gid = make_kgid(&init_user_ns, id);
311 fattr->cf_nlink = le64_to_cpu(info->Nlinks);
315 * Fill a cifs_fattr struct with fake inode info.
317 * Needed to setup cifs_fattr data for the directory which is the
318 * junction to the new submount (ie to setup the fake directory
319 * which represents a DFS referral).
322 cifs_create_dfs_fattr(struct cifs_fattr *fattr, struct super_block *sb)
324 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
326 cifs_dbg(FYI, "creating fake fattr for DFS referral\n");
328 memset(fattr, 0, sizeof(*fattr));
329 fattr->cf_mode = S_IFDIR | S_IXUGO | S_IRWXU;
330 fattr->cf_uid = cifs_sb->mnt_uid;
331 fattr->cf_gid = cifs_sb->mnt_gid;
332 ktime_get_real_ts64(&fattr->cf_mtime);
333 fattr->cf_mtime = timespec64_trunc(fattr->cf_mtime, sb->s_time_gran);
334 fattr->cf_atime = fattr->cf_ctime = fattr->cf_mtime;
336 fattr->cf_flags = CIFS_FATTR_DFS_REFERRAL;
340 cifs_get_file_info_unix(struct file *filp)
344 FILE_UNIX_BASIC_INFO find_data;
345 struct cifs_fattr fattr;
346 struct inode *inode = file_inode(filp);
347 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
348 struct cifsFileInfo *cfile = filp->private_data;
349 struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
352 rc = CIFSSMBUnixQFileInfo(xid, tcon, cfile->fid.netfid, &find_data);
354 cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb);
355 } else if (rc == -EREMOTE) {
356 cifs_create_dfs_fattr(&fattr, inode->i_sb);
360 cifs_fattr_to_inode(inode, &fattr);
365 int cifs_get_inode_info_unix(struct inode **pinode,
366 const unsigned char *full_path,
367 struct super_block *sb, unsigned int xid)
370 FILE_UNIX_BASIC_INFO find_data;
371 struct cifs_fattr fattr;
372 struct cifs_tcon *tcon;
373 struct tcon_link *tlink;
374 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
376 cifs_dbg(FYI, "Getting info on %s\n", full_path);
378 tlink = cifs_sb_tlink(cifs_sb);
380 return PTR_ERR(tlink);
381 tcon = tlink_tcon(tlink);
383 /* could have done a find first instead but this returns more info */
384 rc = CIFSSMBUnixQPathInfo(xid, tcon, full_path, &find_data,
385 cifs_sb->local_nls, cifs_remap(cifs_sb));
386 cifs_put_tlink(tlink);
389 cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb);
390 } else if (rc == -EREMOTE) {
391 cifs_create_dfs_fattr(&fattr, sb);
397 /* check for Minshall+French symlinks */
398 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
399 int tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr,
402 cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc);
405 if (*pinode == NULL) {
407 cifs_fill_uniqueid(sb, &fattr);
408 *pinode = cifs_iget(sb, &fattr);
412 /* we already have inode, update it */
414 /* if uniqueid is different, return error */
415 if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM &&
416 CIFS_I(*pinode)->uniqueid != fattr.cf_uniqueid)) {
417 CIFS_I(*pinode)->time = 0; /* force reval */
422 /* if filetype is different, return error */
423 if (unlikely(((*pinode)->i_mode & S_IFMT) !=
424 (fattr.cf_mode & S_IFMT))) {
425 CIFS_I(*pinode)->time = 0; /* force reval */
430 cifs_fattr_to_inode(*pinode, &fattr);
438 cifs_sfu_type(struct cifs_fattr *fattr, const char *path,
439 struct cifs_sb_info *cifs_sb, unsigned int xid)
443 struct tcon_link *tlink;
444 struct cifs_tcon *tcon;
446 struct cifs_open_parms oparms;
447 struct cifs_io_parms io_parms;
449 unsigned int bytes_read;
451 int buf_type = CIFS_NO_BUFFER;
455 fattr->cf_mode &= ~S_IFMT;
457 if (fattr->cf_eof == 0) {
458 fattr->cf_mode |= S_IFIFO;
459 fattr->cf_dtype = DT_FIFO;
461 } else if (fattr->cf_eof < 8) {
462 fattr->cf_mode |= S_IFREG;
463 fattr->cf_dtype = DT_REG;
464 return -EINVAL; /* EOPNOTSUPP? */
467 tlink = cifs_sb_tlink(cifs_sb);
469 return PTR_ERR(tlink);
470 tcon = tlink_tcon(tlink);
473 oparms.cifs_sb = cifs_sb;
474 oparms.desired_access = GENERIC_READ;
475 oparms.create_options = CREATE_NOT_DIR;
476 if (backup_cred(cifs_sb))
477 oparms.create_options |= CREATE_OPEN_BACKUP_INTENT;
478 oparms.disposition = FILE_OPEN;
481 oparms.reconnect = false;
483 if (tcon->ses->server->oplocks)
487 rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, NULL);
489 cifs_dbg(FYI, "check sfu type of %s, open rc = %d\n", path, rc);
490 cifs_put_tlink(tlink);
495 io_parms.netfid = fid.netfid;
496 io_parms.pid = current->tgid;
497 io_parms.tcon = tcon;
499 io_parms.length = 24;
501 rc = tcon->ses->server->ops->sync_read(xid, &fid, &io_parms,
502 &bytes_read, &pbuf, &buf_type);
503 if ((rc == 0) && (bytes_read >= 8)) {
504 if (memcmp("IntxBLK", pbuf, 8) == 0) {
505 cifs_dbg(FYI, "Block device\n");
506 fattr->cf_mode |= S_IFBLK;
507 fattr->cf_dtype = DT_BLK;
508 if (bytes_read == 24) {
509 /* we have enough to decode dev num */
510 __u64 mjr; /* major */
511 __u64 mnr; /* minor */
512 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
513 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
514 fattr->cf_rdev = MKDEV(mjr, mnr);
516 } else if (memcmp("IntxCHR", pbuf, 8) == 0) {
517 cifs_dbg(FYI, "Char device\n");
518 fattr->cf_mode |= S_IFCHR;
519 fattr->cf_dtype = DT_CHR;
520 if (bytes_read == 24) {
521 /* we have enough to decode dev num */
522 __u64 mjr; /* major */
523 __u64 mnr; /* minor */
524 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
525 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
526 fattr->cf_rdev = MKDEV(mjr, mnr);
528 } else if (memcmp("IntxLNK", pbuf, 7) == 0) {
529 cifs_dbg(FYI, "Symlink\n");
530 fattr->cf_mode |= S_IFLNK;
531 fattr->cf_dtype = DT_LNK;
533 fattr->cf_mode |= S_IFREG; /* file? */
534 fattr->cf_dtype = DT_REG;
538 fattr->cf_mode |= S_IFREG; /* then it is a file */
539 fattr->cf_dtype = DT_REG;
540 rc = -EOPNOTSUPP; /* or some unknown SFU type */
543 tcon->ses->server->ops->close(xid, tcon, &fid);
544 cifs_put_tlink(tlink);
548 #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
551 * Fetch mode bits as provided by SFU.
553 * FIXME: Doesn't this clobber the type bit we got from cifs_sfu_type ?
555 static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path,
556 struct cifs_sb_info *cifs_sb, unsigned int xid)
558 #ifdef CONFIG_CIFS_XATTR
562 struct tcon_link *tlink;
563 struct cifs_tcon *tcon;
565 tlink = cifs_sb_tlink(cifs_sb);
567 return PTR_ERR(tlink);
568 tcon = tlink_tcon(tlink);
570 if (tcon->ses->server->ops->query_all_EAs == NULL) {
571 cifs_put_tlink(tlink);
575 rc = tcon->ses->server->ops->query_all_EAs(xid, tcon, path,
576 "SETFILEBITS", ea_value, 4 /* size of buf */,
578 cifs_put_tlink(tlink);
582 mode = le32_to_cpu(*((__le32 *)ea_value));
583 fattr->cf_mode &= ~SFBITS_MASK;
584 cifs_dbg(FYI, "special bits 0%o org mode 0%o\n",
585 mode, fattr->cf_mode);
586 fattr->cf_mode = (mode & SFBITS_MASK) | fattr->cf_mode;
587 cifs_dbg(FYI, "special mode bits 0%o\n", mode);
596 /* Fill a cifs_fattr struct with info from FILE_ALL_INFO */
598 cifs_all_info_to_fattr(struct cifs_fattr *fattr, FILE_ALL_INFO *info,
599 struct super_block *sb, bool adjust_tz,
602 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
603 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
605 memset(fattr, 0, sizeof(*fattr));
606 fattr->cf_cifsattrs = le32_to_cpu(info->Attributes);
607 if (info->DeletePending)
608 fattr->cf_flags |= CIFS_FATTR_DELETE_PENDING;
610 if (info->LastAccessTime)
611 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
613 ktime_get_real_ts64(&fattr->cf_atime);
614 fattr->cf_atime = timespec64_trunc(fattr->cf_atime, sb->s_time_gran);
617 fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime);
618 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);
621 fattr->cf_ctime.tv_sec += tcon->ses->server->timeAdj;
622 fattr->cf_mtime.tv_sec += tcon->ses->server->timeAdj;
625 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
626 fattr->cf_bytes = le64_to_cpu(info->AllocationSize);
627 fattr->cf_createtime = le64_to_cpu(info->CreationTime);
629 fattr->cf_nlink = le32_to_cpu(info->NumberOfLinks);
632 fattr->cf_mode = S_IFLNK;
633 fattr->cf_dtype = DT_LNK;
634 } else if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
635 fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode;
636 fattr->cf_dtype = DT_DIR;
638 * Server can return wrong NumberOfLinks value for directories
639 * when Unix extensions are disabled - fake it.
642 fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK;
644 fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode;
645 fattr->cf_dtype = DT_REG;
647 /* clear write bits if ATTR_READONLY is set */
648 if (fattr->cf_cifsattrs & ATTR_READONLY)
649 fattr->cf_mode &= ~(S_IWUGO);
652 * Don't accept zero nlink from non-unix servers unless
653 * delete is pending. Instead mark it as unknown.
655 if ((fattr->cf_nlink < 1) && !tcon->unix_ext &&
656 !info->DeletePending) {
657 cifs_dbg(1, "bogus file nlink value %u\n",
659 fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK;
663 fattr->cf_uid = cifs_sb->mnt_uid;
664 fattr->cf_gid = cifs_sb->mnt_gid;
668 cifs_get_file_info(struct file *filp)
672 FILE_ALL_INFO find_data;
673 struct cifs_fattr fattr;
674 struct inode *inode = file_inode(filp);
675 struct cifsFileInfo *cfile = filp->private_data;
676 struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
677 struct TCP_Server_Info *server = tcon->ses->server;
679 if (!server->ops->query_file_info)
683 rc = server->ops->query_file_info(xid, tcon, &cfile->fid, &find_data);
686 cifs_all_info_to_fattr(&fattr, &find_data, inode->i_sb, false,
690 cifs_create_dfs_fattr(&fattr, inode->i_sb);
696 * FIXME: legacy server -- fall back to path-based call?
697 * for now, just skip revalidating and mark inode for
701 CIFS_I(inode)->time = 0;
707 * don't bother with SFU junk here -- just mark inode as needing
710 fattr.cf_uniqueid = CIFS_I(inode)->uniqueid;
711 fattr.cf_flags |= CIFS_FATTR_NEED_REVAL;
712 cifs_fattr_to_inode(inode, &fattr);
718 /* Simple function to return a 64 bit hash of string. Rarely called */
719 static __u64 simple_hashstr(const char *str)
721 const __u64 hash_mult = 1125899906842597ULL; /* a big enough prime */
725 hash = (hash + (__u64) *str++) * hash_mult;
731 * cifs_backup_query_path_info - SMB1 fallback code to get ino
733 * Fallback code to get file metadata when we don't have access to
734 * @full_path (EACCESS) and have backup creds.
736 * @data will be set to search info result buffer
737 * @resp_buf will be set to cifs resp buf and needs to be freed with
738 * cifs_buf_release() when done with @data.
741 cifs_backup_query_path_info(int xid,
742 struct cifs_tcon *tcon,
743 struct super_block *sb,
744 const char *full_path,
746 FILE_ALL_INFO **data)
748 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
749 struct cifs_search_info info = {0};
754 info.endOfSearch = false;
756 info.info_level = SMB_FIND_FILE_UNIX;
757 else if ((tcon->ses->capabilities &
758 tcon->ses->server->vals->cap_nt_find) == 0)
759 info.info_level = SMB_FIND_FILE_INFO_STANDARD;
760 else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
761 info.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
762 else /* no srvino useful for fallback to some netapp */
763 info.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
765 flags = CIFS_SEARCH_CLOSE_ALWAYS |
766 CIFS_SEARCH_CLOSE_AT_END |
767 CIFS_SEARCH_BACKUP_SEARCH;
769 rc = CIFSFindFirst(xid, tcon, full_path,
770 cifs_sb, NULL, flags, &info, false);
774 *resp_buf = (void *)info.ntwrk_buf_start;
775 *data = (FILE_ALL_INFO *)info.srch_entries_start;
780 cifs_set_fattr_ino(int xid,
781 struct cifs_tcon *tcon,
782 struct super_block *sb,
783 struct inode **inode,
784 const char *full_path,
786 struct cifs_fattr *fattr)
788 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
789 struct TCP_Server_Info *server = tcon->ses->server;
792 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
794 fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid;
796 fattr->cf_uniqueid = iunique(sb, ROOT_I);
801 * If we have an inode pass a NULL tcon to ensure we don't
802 * make a round trip to the server. This only works for SMB2+.
804 rc = server->ops->get_srv_inum(xid,
805 *inode ? NULL : tcon,
811 * If that fails reuse existing ino or generate one
812 * and disable server ones
815 fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid;
817 fattr->cf_uniqueid = iunique(sb, ROOT_I);
818 cifs_autodisable_serverino(cifs_sb);
823 /* If no errors, check for zero root inode (invalid) */
824 if (fattr->cf_uniqueid == 0 && strlen(full_path) == 0) {
825 cifs_dbg(FYI, "Invalid (0) inodenum\n");
828 fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid;
830 /* make an ino by hashing the UNC */
831 fattr->cf_flags |= CIFS_FATTR_FAKE_ROOT_INO;
832 fattr->cf_uniqueid = simple_hashstr(tcon->treeName);
837 static inline bool is_inode_cache_good(struct inode *ino)
839 return ino && CIFS_CACHE_READ(CIFS_I(ino)) && CIFS_I(ino)->time != 0;
843 cifs_get_inode_info(struct inode **inode,
844 const char *full_path,
845 FILE_ALL_INFO *in_data,
846 struct super_block *sb, int xid,
847 const struct cifs_fid *fid)
850 struct cifs_tcon *tcon;
851 struct TCP_Server_Info *server;
852 struct tcon_link *tlink;
853 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
854 bool adjust_tz = false;
855 struct cifs_fattr fattr = {0};
856 bool symlink = false;
857 FILE_ALL_INFO *data = in_data;
858 FILE_ALL_INFO *tmp_data = NULL;
859 void *smb1_backup_rsp_buf = NULL;
863 tlink = cifs_sb_tlink(cifs_sb);
865 return PTR_ERR(tlink);
866 tcon = tlink_tcon(tlink);
867 server = tcon->ses->server;
870 * 1. Fetch file metadata if not provided (data)
874 if (is_inode_cache_good(*inode)) {
875 cifs_dbg(FYI, "No need to revalidate cached inode sizes\n");
878 tmp_data = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
883 rc = server->ops->query_path_info(xid, tcon, cifs_sb,
885 &adjust_tz, &symlink);
890 * 2. Convert it to internal cifs metadata (fattr)
895 cifs_all_info_to_fattr(&fattr, data, sb, adjust_tz, symlink);
898 /* DFS link, no metadata available on this server */
899 cifs_create_dfs_fattr(&fattr, sb);
904 * perm errors, try again with backup flags if possible
906 * For SMB2 and later the backup intent flag
907 * is already sent if needed on open and there
908 * is no path based FindFirst operation to use
911 if (backup_cred(cifs_sb) && is_smb1_server(server)) {
912 /* for easier reading */
913 FILE_DIRECTORY_INFO *fdi;
914 SEARCH_ID_FULL_DIR_INFO *si;
916 rc = cifs_backup_query_path_info(xid, tcon, sb,
918 &smb1_backup_rsp_buf,
923 fdi = (FILE_DIRECTORY_INFO *)data;
924 si = (SEARCH_ID_FULL_DIR_INFO *)data;
926 cifs_dir_info_to_fattr(&fattr, fdi, cifs_sb);
927 fattr.cf_uniqueid = le64_to_cpu(si->UniqueId);
928 /* uniqueid set, skip get inum step */
931 /* nothing we can do, bail out */
936 cifs_dbg(FYI, "%s: unhandled err rc %d\n", __func__, rc);
941 * 3. Get or update inode number (fattr.cf_uniqueid)
944 cifs_set_fattr_ino(xid, tcon, sb, inode, full_path, data, &fattr);
947 * 4. Tweak fattr based on mount options
951 /* query for SFU type info if supported and needed */
952 if (fattr.cf_cifsattrs & ATTR_SYSTEM &&
953 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
954 tmprc = cifs_sfu_type(&fattr, full_path, cifs_sb, xid);
956 cifs_dbg(FYI, "cifs_sfu_type failed: %d\n", tmprc);
959 /* fill in 0777 bits from ACL */
960 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID) {
961 rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, true,
964 cifs_dbg(FYI, "%s: Get mode from SID failed. rc=%d\n",
968 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
969 rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, false,
972 cifs_dbg(FYI, "%s: Getting ACL failed with error: %d\n",
978 /* fill in remaining high mode bits e.g. SUID, VTX */
979 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
980 cifs_sfu_mode(&fattr, full_path, cifs_sb, xid);
982 /* check for Minshall+French symlinks */
983 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
984 tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr,
987 cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc);
991 * 5. Update inode with final fattr data
995 *inode = cifs_iget(sb, &fattr);
999 /* we already have inode, update it */
1001 /* if uniqueid is different, return error */
1002 if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM &&
1003 CIFS_I(*inode)->uniqueid != fattr.cf_uniqueid)) {
1004 CIFS_I(*inode)->time = 0; /* force reval */
1009 /* if filetype is different, return error */
1010 if (unlikely(((*inode)->i_mode & S_IFMT) !=
1011 (fattr.cf_mode & S_IFMT))) {
1012 CIFS_I(*inode)->time = 0; /* force reval */
1017 cifs_fattr_to_inode(*inode, &fattr);
1020 cifs_buf_release(smb1_backup_rsp_buf);
1021 cifs_put_tlink(tlink);
1026 static const struct inode_operations cifs_ipc_inode_ops = {
1027 .lookup = cifs_lookup,
1031 cifs_find_inode(struct inode *inode, void *opaque)
1033 struct cifs_fattr *fattr = (struct cifs_fattr *) opaque;
1035 /* don't match inode with different uniqueid */
1036 if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid)
1039 /* use createtime like an i_generation field */
1040 if (CIFS_I(inode)->createtime != fattr->cf_createtime)
1043 /* don't match inode of different type */
1044 if ((inode->i_mode & S_IFMT) != (fattr->cf_mode & S_IFMT))
1047 /* if it's not a directory or has no dentries, then flag it */
1048 if (S_ISDIR(inode->i_mode) && !hlist_empty(&inode->i_dentry))
1049 fattr->cf_flags |= CIFS_FATTR_INO_COLLISION;
1055 cifs_init_inode(struct inode *inode, void *opaque)
1057 struct cifs_fattr *fattr = (struct cifs_fattr *) opaque;
1059 CIFS_I(inode)->uniqueid = fattr->cf_uniqueid;
1060 CIFS_I(inode)->createtime = fattr->cf_createtime;
1065 * walk dentry list for an inode and report whether it has aliases that
1066 * are hashed. We use this to determine if a directory inode can actually
1070 inode_has_hashed_dentries(struct inode *inode)
1072 struct dentry *dentry;
1074 spin_lock(&inode->i_lock);
1075 hlist_for_each_entry(dentry, &inode->i_dentry, d_u.d_alias) {
1076 if (!d_unhashed(dentry) || IS_ROOT(dentry)) {
1077 spin_unlock(&inode->i_lock);
1081 spin_unlock(&inode->i_lock);
1085 /* Given fattrs, get a corresponding inode */
1087 cifs_iget(struct super_block *sb, struct cifs_fattr *fattr)
1090 struct inode *inode;
1093 cifs_dbg(FYI, "looking for uniqueid=%llu\n", fattr->cf_uniqueid);
1095 /* hash down to 32-bits on 32-bit arch */
1096 hash = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid);
1098 inode = iget5_locked(sb, hash, cifs_find_inode, cifs_init_inode, fattr);
1100 /* was there a potentially problematic inode collision? */
1101 if (fattr->cf_flags & CIFS_FATTR_INO_COLLISION) {
1102 fattr->cf_flags &= ~CIFS_FATTR_INO_COLLISION;
1104 if (inode_has_hashed_dentries(inode)) {
1105 cifs_autodisable_serverino(CIFS_SB(sb));
1107 fattr->cf_uniqueid = iunique(sb, ROOT_I);
1108 goto retry_iget5_locked;
1112 cifs_fattr_to_inode(inode, fattr);
1113 if (sb->s_flags & SB_NOATIME)
1114 inode->i_flags |= S_NOATIME | S_NOCMTIME;
1115 if (inode->i_state & I_NEW) {
1116 inode->i_ino = hash;
1117 #ifdef CONFIG_CIFS_FSCACHE
1118 /* initialize per-inode cache cookie pointer */
1119 CIFS_I(inode)->fscache = NULL;
1121 unlock_new_inode(inode);
1128 /* gets root inode */
1129 struct inode *cifs_root_iget(struct super_block *sb)
1132 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1133 struct inode *inode = NULL;
1135 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
1139 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH)
1140 && cifs_sb->prepath) {
1141 len = strlen(cifs_sb->prepath);
1142 path = kzalloc(len + 2 /* leading sep + null */, GFP_KERNEL);
1144 return ERR_PTR(-ENOMEM);
1146 memcpy(path+1, cifs_sb->prepath, len);
1148 path = kstrdup("", GFP_KERNEL);
1150 return ERR_PTR(-ENOMEM);
1154 if (tcon->unix_ext) {
1155 rc = cifs_get_inode_info_unix(&inode, path, sb, xid);
1156 /* some servers mistakenly claim POSIX support */
1157 if (rc != -EOPNOTSUPP)
1159 cifs_dbg(VFS, "server does not support POSIX extensions");
1160 tcon->unix_ext = false;
1163 convert_delimiter(path, CIFS_DIR_SEP(cifs_sb));
1164 rc = cifs_get_inode_info(&inode, path, NULL, sb, xid, NULL);
1168 inode = ERR_PTR(rc);
1172 #ifdef CONFIG_CIFS_FSCACHE
1173 /* populate tcon->resource_id */
1174 tcon->resource_id = CIFS_I(inode)->uniqueid;
1177 if (rc && tcon->pipe) {
1178 cifs_dbg(FYI, "ipc connection - fake read inode\n");
1179 spin_lock(&inode->i_lock);
1180 inode->i_mode |= S_IFDIR;
1181 set_nlink(inode, 2);
1182 inode->i_op = &cifs_ipc_inode_ops;
1183 inode->i_fop = &simple_dir_operations;
1184 inode->i_uid = cifs_sb->mnt_uid;
1185 inode->i_gid = cifs_sb->mnt_gid;
1186 spin_unlock(&inode->i_lock);
1189 inode = ERR_PTR(rc);
1199 cifs_set_file_info(struct inode *inode, struct iattr *attrs, unsigned int xid,
1200 char *full_path, __u32 dosattr)
1202 bool set_time = false;
1203 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1204 struct TCP_Server_Info *server;
1205 FILE_BASIC_INFO info_buf;
1210 server = cifs_sb_master_tcon(cifs_sb)->ses->server;
1211 if (!server->ops->set_file_info)
1216 if (attrs->ia_valid & ATTR_ATIME) {
1218 info_buf.LastAccessTime =
1219 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1221 info_buf.LastAccessTime = 0;
1223 if (attrs->ia_valid & ATTR_MTIME) {
1225 info_buf.LastWriteTime =
1226 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1228 info_buf.LastWriteTime = 0;
1231 * Samba throws this field away, but windows may actually use it.
1232 * Do not set ctime unless other time stamps are changed explicitly
1233 * (i.e. by utimes()) since we would then have a mix of client and
1236 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1237 cifs_dbg(FYI, "CIFS - CTIME changed\n");
1238 info_buf.ChangeTime =
1239 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1241 info_buf.ChangeTime = 0;
1243 info_buf.CreationTime = 0; /* don't change */
1244 info_buf.Attributes = cpu_to_le32(dosattr);
1246 return server->ops->set_file_info(inode, full_path, &info_buf, xid);
1250 * Open the given file (if it isn't already), set the DELETE_ON_CLOSE bit
1251 * and rename it to a random name that hopefully won't conflict with
1255 cifs_rename_pending_delete(const char *full_path, struct dentry *dentry,
1256 const unsigned int xid)
1260 struct cifs_fid fid;
1261 struct cifs_open_parms oparms;
1262 struct inode *inode = d_inode(dentry);
1263 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1264 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1265 struct tcon_link *tlink;
1266 struct cifs_tcon *tcon;
1267 __u32 dosattr, origattr;
1268 FILE_BASIC_INFO *info_buf = NULL;
1270 tlink = cifs_sb_tlink(cifs_sb);
1272 return PTR_ERR(tlink);
1273 tcon = tlink_tcon(tlink);
1276 * We cannot rename the file if the server doesn't support
1277 * CAP_INFOLEVEL_PASSTHRU
1279 if (!(tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)) {
1285 oparms.cifs_sb = cifs_sb;
1286 oparms.desired_access = DELETE | FILE_WRITE_ATTRIBUTES;
1287 oparms.create_options = CREATE_NOT_DIR;
1288 oparms.disposition = FILE_OPEN;
1289 oparms.path = full_path;
1291 oparms.reconnect = false;
1293 rc = CIFS_open(xid, &oparms, &oplock, NULL);
1297 origattr = cifsInode->cifsAttrs;
1299 origattr |= ATTR_NORMAL;
1301 dosattr = origattr & ~ATTR_READONLY;
1303 dosattr |= ATTR_NORMAL;
1304 dosattr |= ATTR_HIDDEN;
1306 /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */
1307 if (dosattr != origattr) {
1308 info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL);
1309 if (info_buf == NULL) {
1313 info_buf->Attributes = cpu_to_le32(dosattr);
1314 rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid,
1316 /* although we would like to mark the file hidden
1317 if that fails we will still try to rename it */
1319 cifsInode->cifsAttrs = dosattr;
1321 dosattr = origattr; /* since not able to change them */
1324 /* rename the file */
1325 rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, NULL,
1327 cifs_remap(cifs_sb));
1333 /* try to set DELETE_ON_CLOSE */
1334 if (!test_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags)) {
1335 rc = CIFSSMBSetFileDisposition(xid, tcon, true, fid.netfid,
1338 * some samba versions return -ENOENT when we try to set the
1339 * file disposition here. Likely a samba bug, but work around
1340 * it for now. This means that some cifsXXX files may hang
1341 * around after they shouldn't.
1343 * BB: remove this hack after more servers have the fix
1351 set_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags);
1355 CIFSSMBClose(xid, tcon, fid.netfid);
1358 cifs_put_tlink(tlink);
1362 * reset everything back to the original state. Don't bother
1363 * dealing with errors here since we can't do anything about
1367 CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, dentry->d_name.name,
1368 cifs_sb->local_nls, cifs_remap(cifs_sb));
1370 if (dosattr != origattr) {
1371 info_buf->Attributes = cpu_to_le32(origattr);
1372 if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid,
1374 cifsInode->cifsAttrs = origattr;
1380 /* copied from fs/nfs/dir.c with small changes */
1382 cifs_drop_nlink(struct inode *inode)
1384 spin_lock(&inode->i_lock);
1385 if (inode->i_nlink > 0)
1387 spin_unlock(&inode->i_lock);
1391 * If d_inode(dentry) is null (usually meaning the cached dentry
1392 * is a negative dentry) then we would attempt a standard SMB delete, but
1393 * if that fails we can not attempt the fall back mechanisms on EACCES
1394 * but will return the EACCES to the caller. Note that the VFS does not call
1395 * unlink on negative dentries currently.
1397 int cifs_unlink(struct inode *dir, struct dentry *dentry)
1401 char *full_path = NULL;
1402 struct inode *inode = d_inode(dentry);
1403 struct cifsInodeInfo *cifs_inode;
1404 struct super_block *sb = dir->i_sb;
1405 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1406 struct tcon_link *tlink;
1407 struct cifs_tcon *tcon;
1408 struct TCP_Server_Info *server;
1409 struct iattr *attrs = NULL;
1410 __u32 dosattr = 0, origattr = 0;
1412 cifs_dbg(FYI, "cifs_unlink, dir=0x%p, dentry=0x%p\n", dir, dentry);
1414 tlink = cifs_sb_tlink(cifs_sb);
1416 return PTR_ERR(tlink);
1417 tcon = tlink_tcon(tlink);
1418 server = tcon->ses->server;
1422 /* Unlink can be called from rename so we can not take the
1423 * sb->s_vfs_rename_mutex here */
1424 full_path = build_path_from_dentry(dentry);
1425 if (full_path == NULL) {
1430 if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1431 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1432 rc = CIFSPOSIXDelFile(xid, tcon, full_path,
1433 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
1434 cifs_remap(cifs_sb));
1435 cifs_dbg(FYI, "posix del rc %d\n", rc);
1436 if ((rc == 0) || (rc == -ENOENT))
1437 goto psx_del_no_retry;
1441 if (!server->ops->unlink) {
1443 goto psx_del_no_retry;
1446 rc = server->ops->unlink(xid, tcon, full_path, cifs_sb);
1451 cifs_drop_nlink(inode);
1452 } else if (rc == -ENOENT) {
1454 } else if (rc == -EBUSY) {
1455 if (server->ops->rename_pending_delete) {
1456 rc = server->ops->rename_pending_delete(full_path,
1459 cifs_drop_nlink(inode);
1461 } else if ((rc == -EACCES) && (dosattr == 0) && inode) {
1462 attrs = kzalloc(sizeof(*attrs), GFP_KERNEL);
1463 if (attrs == NULL) {
1468 /* try to reset dos attributes */
1469 cifs_inode = CIFS_I(inode);
1470 origattr = cifs_inode->cifsAttrs;
1472 origattr |= ATTR_NORMAL;
1473 dosattr = origattr & ~ATTR_READONLY;
1475 dosattr |= ATTR_NORMAL;
1476 dosattr |= ATTR_HIDDEN;
1478 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
1482 goto retry_std_delete;
1485 /* undo the setattr if we errored out and it's needed */
1486 if (rc != 0 && dosattr != 0)
1487 cifs_set_file_info(inode, attrs, xid, full_path, origattr);
1491 cifs_inode = CIFS_I(inode);
1492 cifs_inode->time = 0; /* will force revalidate to get info
1494 inode->i_ctime = current_time(inode);
1496 dir->i_ctime = dir->i_mtime = current_time(dir);
1497 cifs_inode = CIFS_I(dir);
1498 CIFS_I(dir)->time = 0; /* force revalidate of dir as well */
1503 cifs_put_tlink(tlink);
1508 cifs_mkdir_qinfo(struct inode *parent, struct dentry *dentry, umode_t mode,
1509 const char *full_path, struct cifs_sb_info *cifs_sb,
1510 struct cifs_tcon *tcon, const unsigned int xid)
1513 struct inode *inode = NULL;
1516 rc = cifs_get_inode_info_unix(&inode, full_path, parent->i_sb,
1519 rc = cifs_get_inode_info(&inode, full_path, NULL, parent->i_sb,
1526 * setting nlink not necessary except in cases where we failed to get it
1527 * from the server or was set bogus. Also, since this is a brand new
1528 * inode, no need to grab the i_lock before setting the i_nlink.
1530 if (inode->i_nlink < 2)
1531 set_nlink(inode, 2);
1532 mode &= ~current_umask();
1533 /* must turn on setgid bit if parent dir has it */
1534 if (parent->i_mode & S_ISGID)
1537 if (tcon->unix_ext) {
1538 struct cifs_unix_set_info_args args = {
1540 .ctime = NO_CHANGE_64,
1541 .atime = NO_CHANGE_64,
1542 .mtime = NO_CHANGE_64,
1545 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1546 args.uid = current_fsuid();
1547 if (parent->i_mode & S_ISGID)
1548 args.gid = parent->i_gid;
1550 args.gid = current_fsgid();
1552 args.uid = INVALID_UID; /* no change */
1553 args.gid = INVALID_GID; /* no change */
1555 CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args,
1557 cifs_remap(cifs_sb));
1559 struct TCP_Server_Info *server = tcon->ses->server;
1560 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
1561 (mode & S_IWUGO) == 0 && server->ops->mkdir_setinfo)
1562 server->ops->mkdir_setinfo(inode, full_path, cifs_sb,
1564 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
1565 inode->i_mode = (mode | S_IFDIR);
1567 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1568 inode->i_uid = current_fsuid();
1569 if (inode->i_mode & S_ISGID)
1570 inode->i_gid = parent->i_gid;
1572 inode->i_gid = current_fsgid();
1575 d_instantiate(dentry, inode);
1580 cifs_posix_mkdir(struct inode *inode, struct dentry *dentry, umode_t mode,
1581 const char *full_path, struct cifs_sb_info *cifs_sb,
1582 struct cifs_tcon *tcon, const unsigned int xid)
1586 FILE_UNIX_BASIC_INFO *info = NULL;
1587 struct inode *newinode = NULL;
1588 struct cifs_fattr fattr;
1590 info = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1593 goto posix_mkdir_out;
1596 mode &= ~current_umask();
1597 rc = CIFSPOSIXCreate(xid, tcon, SMB_O_DIRECTORY | SMB_O_CREAT, mode,
1598 NULL /* netfid */, info, &oplock, full_path,
1599 cifs_sb->local_nls, cifs_remap(cifs_sb));
1600 if (rc == -EOPNOTSUPP)
1601 goto posix_mkdir_out;
1603 cifs_dbg(FYI, "posix mkdir returned 0x%x\n", rc);
1605 goto posix_mkdir_out;
1608 if (info->Type == cpu_to_le32(-1))
1609 /* no return info, go query for it */
1610 goto posix_mkdir_get_info;
1612 * BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if
1613 * need to set uid/gid.
1616 cifs_unix_basic_to_fattr(&fattr, info, cifs_sb);
1617 cifs_fill_uniqueid(inode->i_sb, &fattr);
1618 newinode = cifs_iget(inode->i_sb, &fattr);
1620 goto posix_mkdir_get_info;
1622 d_instantiate(dentry, newinode);
1624 #ifdef CONFIG_CIFS_DEBUG2
1625 cifs_dbg(FYI, "instantiated dentry %p %pd to inode %p\n",
1626 dentry, dentry, newinode);
1628 if (newinode->i_nlink != 2)
1629 cifs_dbg(FYI, "unexpected number of links %d\n",
1636 posix_mkdir_get_info:
1637 rc = cifs_mkdir_qinfo(inode, dentry, mode, full_path, cifs_sb, tcon,
1639 goto posix_mkdir_out;
1642 int cifs_mkdir(struct inode *inode, struct dentry *direntry, umode_t mode)
1646 struct cifs_sb_info *cifs_sb;
1647 struct tcon_link *tlink;
1648 struct cifs_tcon *tcon;
1649 struct TCP_Server_Info *server;
1652 cifs_dbg(FYI, "In cifs_mkdir, mode = 0x%hx inode = 0x%p\n",
1655 cifs_sb = CIFS_SB(inode->i_sb);
1656 tlink = cifs_sb_tlink(cifs_sb);
1658 return PTR_ERR(tlink);
1659 tcon = tlink_tcon(tlink);
1663 full_path = build_path_from_dentry(direntry);
1664 if (full_path == NULL) {
1669 server = tcon->ses->server;
1671 if ((server->ops->posix_mkdir) && (tcon->posix_extensions)) {
1672 rc = server->ops->posix_mkdir(xid, inode, mode, tcon, full_path,
1674 d_drop(direntry); /* for time being always refresh inode info */
1678 if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1679 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1680 rc = cifs_posix_mkdir(inode, direntry, mode, full_path, cifs_sb,
1682 if (rc != -EOPNOTSUPP)
1686 if (!server->ops->mkdir) {
1691 /* BB add setting the equivalent of mode via CreateX w/ACLs */
1692 rc = server->ops->mkdir(xid, inode, mode, tcon, full_path, cifs_sb);
1694 cifs_dbg(FYI, "cifs_mkdir returned 0x%x\n", rc);
1699 /* TODO: skip this for smb2/smb3 */
1700 rc = cifs_mkdir_qinfo(inode, direntry, mode, full_path, cifs_sb, tcon,
1704 * Force revalidate to get parent dir info when needed since cached
1705 * attributes are invalid now.
1707 CIFS_I(inode)->time = 0;
1710 cifs_put_tlink(tlink);
1714 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1718 struct cifs_sb_info *cifs_sb;
1719 struct tcon_link *tlink;
1720 struct cifs_tcon *tcon;
1721 struct TCP_Server_Info *server;
1722 char *full_path = NULL;
1723 struct cifsInodeInfo *cifsInode;
1725 cifs_dbg(FYI, "cifs_rmdir, inode = 0x%p\n", inode);
1729 full_path = build_path_from_dentry(direntry);
1730 if (full_path == NULL) {
1735 cifs_sb = CIFS_SB(inode->i_sb);
1736 tlink = cifs_sb_tlink(cifs_sb);
1737 if (IS_ERR(tlink)) {
1738 rc = PTR_ERR(tlink);
1741 tcon = tlink_tcon(tlink);
1742 server = tcon->ses->server;
1744 if (!server->ops->rmdir) {
1746 cifs_put_tlink(tlink);
1750 rc = server->ops->rmdir(xid, tcon, full_path, cifs_sb);
1751 cifs_put_tlink(tlink);
1754 spin_lock(&d_inode(direntry)->i_lock);
1755 i_size_write(d_inode(direntry), 0);
1756 clear_nlink(d_inode(direntry));
1757 spin_unlock(&d_inode(direntry)->i_lock);
1760 cifsInode = CIFS_I(d_inode(direntry));
1761 /* force revalidate to go get info when needed */
1762 cifsInode->time = 0;
1764 cifsInode = CIFS_I(inode);
1766 * Force revalidate to get parent dir info when needed since cached
1767 * attributes are invalid now.
1769 cifsInode->time = 0;
1771 d_inode(direntry)->i_ctime = inode->i_ctime = inode->i_mtime =
1772 current_time(inode);
1781 cifs_do_rename(const unsigned int xid, struct dentry *from_dentry,
1782 const char *from_path, struct dentry *to_dentry,
1783 const char *to_path)
1785 struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb);
1786 struct tcon_link *tlink;
1787 struct cifs_tcon *tcon;
1788 struct TCP_Server_Info *server;
1789 struct cifs_fid fid;
1790 struct cifs_open_parms oparms;
1793 tlink = cifs_sb_tlink(cifs_sb);
1795 return PTR_ERR(tlink);
1796 tcon = tlink_tcon(tlink);
1797 server = tcon->ses->server;
1799 if (!server->ops->rename)
1802 /* try path-based rename first */
1803 rc = server->ops->rename(xid, tcon, from_path, to_path, cifs_sb);
1806 * Don't bother with rename by filehandle unless file is busy and
1807 * source. Note that cross directory moves do not work with
1808 * rename by filehandle to various Windows servers.
1810 if (rc == 0 || rc != -EBUSY)
1811 goto do_rename_exit;
1813 /* Don't fall back to using SMB on SMB 2+ mount */
1814 if (server->vals->protocol_id != 0)
1815 goto do_rename_exit;
1817 /* open-file renames don't work across directories */
1818 if (to_dentry->d_parent != from_dentry->d_parent)
1819 goto do_rename_exit;
1822 oparms.cifs_sb = cifs_sb;
1823 /* open the file to be renamed -- we need DELETE perms */
1824 oparms.desired_access = DELETE;
1825 oparms.create_options = CREATE_NOT_DIR;
1826 oparms.disposition = FILE_OPEN;
1827 oparms.path = from_path;
1829 oparms.reconnect = false;
1831 rc = CIFS_open(xid, &oparms, &oplock, NULL);
1833 rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid,
1834 (const char *) to_dentry->d_name.name,
1835 cifs_sb->local_nls, cifs_remap(cifs_sb));
1836 CIFSSMBClose(xid, tcon, fid.netfid);
1839 cifs_put_tlink(tlink);
1844 cifs_rename2(struct inode *source_dir, struct dentry *source_dentry,
1845 struct inode *target_dir, struct dentry *target_dentry,
1848 char *from_name = NULL;
1849 char *to_name = NULL;
1850 struct cifs_sb_info *cifs_sb;
1851 struct tcon_link *tlink;
1852 struct cifs_tcon *tcon;
1853 FILE_UNIX_BASIC_INFO *info_buf_source = NULL;
1854 FILE_UNIX_BASIC_INFO *info_buf_target;
1858 if (flags & ~RENAME_NOREPLACE)
1861 cifs_sb = CIFS_SB(source_dir->i_sb);
1862 tlink = cifs_sb_tlink(cifs_sb);
1864 return PTR_ERR(tlink);
1865 tcon = tlink_tcon(tlink);
1870 * we already have the rename sem so we do not need to
1871 * grab it again here to protect the path integrity
1873 from_name = build_path_from_dentry(source_dentry);
1874 if (from_name == NULL) {
1876 goto cifs_rename_exit;
1879 to_name = build_path_from_dentry(target_dentry);
1880 if (to_name == NULL) {
1882 goto cifs_rename_exit;
1885 rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry,
1889 * No-replace is the natural behavior for CIFS, so skip unlink hacks.
1891 if (flags & RENAME_NOREPLACE)
1892 goto cifs_rename_exit;
1894 if (rc == -EEXIST && tcon->unix_ext) {
1896 * Are src and dst hardlinks of same inode? We can only tell
1897 * with unix extensions enabled.
1900 kmalloc_array(2, sizeof(FILE_UNIX_BASIC_INFO),
1902 if (info_buf_source == NULL) {
1904 goto cifs_rename_exit;
1907 info_buf_target = info_buf_source + 1;
1908 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, from_name,
1911 cifs_remap(cifs_sb));
1915 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, to_name,
1918 cifs_remap(cifs_sb));
1920 if (tmprc == 0 && (info_buf_source->UniqueId ==
1921 info_buf_target->UniqueId)) {
1922 /* same file, POSIX says that this is a noop */
1924 goto cifs_rename_exit;
1928 * else ... BB we could add the same check for Windows by
1929 * checking the UniqueId via FILE_INTERNAL_INFO
1933 /* Try unlinking the target dentry if it's not negative */
1934 if (d_really_is_positive(target_dentry) && (rc == -EACCES || rc == -EEXIST)) {
1935 if (d_is_dir(target_dentry))
1936 tmprc = cifs_rmdir(target_dir, target_dentry);
1938 tmprc = cifs_unlink(target_dir, target_dentry);
1940 goto cifs_rename_exit;
1941 rc = cifs_do_rename(xid, source_dentry, from_name,
1942 target_dentry, to_name);
1945 /* force revalidate to go get info when needed */
1946 CIFS_I(source_dir)->time = CIFS_I(target_dir)->time = 0;
1948 source_dir->i_ctime = source_dir->i_mtime = target_dir->i_ctime =
1949 target_dir->i_mtime = current_time(source_dir);
1952 kfree(info_buf_source);
1956 cifs_put_tlink(tlink);
1961 cifs_inode_needs_reval(struct inode *inode)
1963 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
1964 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1966 if (cifs_i->time == 0)
1969 if (CIFS_CACHE_READ(cifs_i))
1972 if (!lookupCacheEnabled)
1975 if (!cifs_sb->actimeo)
1978 if (!time_in_range(jiffies, cifs_i->time,
1979 cifs_i->time + cifs_sb->actimeo))
1982 /* hardlinked files w/ noserverino get "special" treatment */
1983 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) &&
1984 S_ISREG(inode->i_mode) && inode->i_nlink != 1)
1991 * Zap the cache. Called when invalid_mapping flag is set.
1994 cifs_invalidate_mapping(struct inode *inode)
1998 if (inode->i_mapping && inode->i_mapping->nrpages != 0) {
1999 rc = invalidate_inode_pages2(inode->i_mapping);
2001 cifs_dbg(VFS, "%s: could not invalidate inode %p\n",
2005 cifs_fscache_reset_inode_cookie(inode);
2010 * cifs_wait_bit_killable - helper for functions that are sleeping on bit locks
2011 * @word: long word containing the bit lock
2014 cifs_wait_bit_killable(struct wait_bit_key *key, int mode)
2016 freezable_schedule_unsafe();
2017 if (signal_pending_state(mode, current))
2018 return -ERESTARTSYS;
2023 cifs_revalidate_mapping(struct inode *inode)
2026 unsigned long *flags = &CIFS_I(inode)->flags;
2028 rc = wait_on_bit_lock_action(flags, CIFS_INO_LOCK, cifs_wait_bit_killable,
2033 if (test_and_clear_bit(CIFS_INO_INVALID_MAPPING, flags)) {
2034 rc = cifs_invalidate_mapping(inode);
2036 set_bit(CIFS_INO_INVALID_MAPPING, flags);
2039 clear_bit_unlock(CIFS_INO_LOCK, flags);
2040 smp_mb__after_atomic();
2041 wake_up_bit(flags, CIFS_INO_LOCK);
2047 cifs_zap_mapping(struct inode *inode)
2049 set_bit(CIFS_INO_INVALID_MAPPING, &CIFS_I(inode)->flags);
2050 return cifs_revalidate_mapping(inode);
2053 int cifs_revalidate_file_attr(struct file *filp)
2056 struct inode *inode = file_inode(filp);
2057 struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data;
2059 if (!cifs_inode_needs_reval(inode))
2062 if (tlink_tcon(cfile->tlink)->unix_ext)
2063 rc = cifs_get_file_info_unix(filp);
2065 rc = cifs_get_file_info(filp);
2070 int cifs_revalidate_dentry_attr(struct dentry *dentry)
2074 struct inode *inode = d_inode(dentry);
2075 struct super_block *sb = dentry->d_sb;
2076 char *full_path = NULL;
2081 if (!cifs_inode_needs_reval(inode))
2086 /* can not safely grab the rename sem here if rename calls revalidate
2087 since that would deadlock */
2088 full_path = build_path_from_dentry(dentry);
2089 if (full_path == NULL) {
2094 cifs_dbg(FYI, "Update attributes: %s inode 0x%p count %d dentry: 0x%p d_time %ld jiffies %ld\n",
2095 full_path, inode, inode->i_count.counter,
2096 dentry, cifs_get_time(dentry), jiffies);
2098 if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext)
2099 rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid);
2101 rc = cifs_get_inode_info(&inode, full_path, NULL, sb,
2110 int cifs_revalidate_file(struct file *filp)
2113 struct inode *inode = file_inode(filp);
2115 rc = cifs_revalidate_file_attr(filp);
2119 return cifs_revalidate_mapping(inode);
2122 /* revalidate a dentry's inode attributes */
2123 int cifs_revalidate_dentry(struct dentry *dentry)
2126 struct inode *inode = d_inode(dentry);
2128 rc = cifs_revalidate_dentry_attr(dentry);
2132 return cifs_revalidate_mapping(inode);
2135 int cifs_getattr(const struct path *path, struct kstat *stat,
2136 u32 request_mask, unsigned int flags)
2138 struct dentry *dentry = path->dentry;
2139 struct cifs_sb_info *cifs_sb = CIFS_SB(dentry->d_sb);
2140 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
2141 struct inode *inode = d_inode(dentry);
2145 * We need to be sure that all dirty pages are written and the server
2146 * has actual ctime, mtime and file length.
2148 if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
2149 inode->i_mapping->nrpages != 0) {
2150 rc = filemap_fdatawait(inode->i_mapping);
2152 mapping_set_error(inode->i_mapping, rc);
2157 rc = cifs_revalidate_dentry_attr(dentry);
2161 generic_fillattr(inode, stat);
2162 stat->blksize = cifs_sb->bsize;
2163 stat->ino = CIFS_I(inode)->uniqueid;
2165 /* old CIFS Unix Extensions doesn't return create time */
2166 if (CIFS_I(inode)->createtime) {
2167 stat->result_mask |= STATX_BTIME;
2169 cifs_NTtimeToUnix(cpu_to_le64(CIFS_I(inode)->createtime));
2172 stat->attributes_mask |= (STATX_ATTR_COMPRESSED | STATX_ATTR_ENCRYPTED);
2173 if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_COMPRESSED)
2174 stat->attributes |= STATX_ATTR_COMPRESSED;
2175 if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_ENCRYPTED)
2176 stat->attributes |= STATX_ATTR_ENCRYPTED;
2179 * If on a multiuser mount without unix extensions or cifsacl being
2180 * enabled, and the admin hasn't overridden them, set the ownership
2181 * to the fsuid/fsgid of the current process.
2183 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) &&
2184 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
2186 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID))
2187 stat->uid = current_fsuid();
2188 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID))
2189 stat->gid = current_fsgid();
2194 int cifs_fiemap(struct inode *inode, struct fiemap_extent_info *fei, u64 start,
2197 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2198 struct cifs_sb_info *cifs_sb = CIFS_SB(cifs_i->vfs_inode.i_sb);
2199 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
2200 struct TCP_Server_Info *server = tcon->ses->server;
2201 struct cifsFileInfo *cfile;
2205 * We need to be sure that all dirty pages are written as they
2206 * might fill holes on the server.
2208 if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
2209 inode->i_mapping->nrpages != 0) {
2210 rc = filemap_fdatawait(inode->i_mapping);
2212 mapping_set_error(inode->i_mapping, rc);
2217 cfile = find_readable_file(cifs_i, false);
2221 if (server->ops->fiemap) {
2222 rc = server->ops->fiemap(tcon, cfile, fei, start, len);
2223 cifsFileInfo_put(cfile);
2227 cifsFileInfo_put(cfile);
2231 int cifs_truncate_page(struct address_space *mapping, loff_t from)
2233 pgoff_t index = from >> PAGE_SHIFT;
2234 unsigned offset = from & (PAGE_SIZE - 1);
2238 page = grab_cache_page(mapping, index);
2242 zero_user_segment(page, offset, PAGE_SIZE);
2248 void cifs_setsize(struct inode *inode, loff_t offset)
2250 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2252 spin_lock(&inode->i_lock);
2253 i_size_write(inode, offset);
2254 spin_unlock(&inode->i_lock);
2256 /* Cached inode must be refreshed on truncate */
2258 truncate_pagecache(inode, offset);
2262 cifs_set_file_size(struct inode *inode, struct iattr *attrs,
2263 unsigned int xid, char *full_path)
2266 struct cifsFileInfo *open_file;
2267 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2268 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2269 struct tcon_link *tlink = NULL;
2270 struct cifs_tcon *tcon = NULL;
2271 struct TCP_Server_Info *server;
2274 * To avoid spurious oplock breaks from server, in the case of
2275 * inodes that we already have open, avoid doing path based
2276 * setting of file size if we can do it by handle.
2277 * This keeps our caching token (oplock) and avoids timeouts
2278 * when the local oplock break takes longer to flush
2279 * writebehind data than the SMB timeout for the SetPathInfo
2280 * request would allow
2282 open_file = find_writable_file(cifsInode, true);
2284 tcon = tlink_tcon(open_file->tlink);
2285 server = tcon->ses->server;
2286 if (server->ops->set_file_size)
2287 rc = server->ops->set_file_size(xid, tcon, open_file,
2288 attrs->ia_size, false);
2291 cifsFileInfo_put(open_file);
2292 cifs_dbg(FYI, "SetFSize for attrs rc = %d\n", rc);
2300 tlink = cifs_sb_tlink(cifs_sb);
2302 return PTR_ERR(tlink);
2303 tcon = tlink_tcon(tlink);
2304 server = tcon->ses->server;
2308 * Set file size by pathname rather than by handle either because no
2309 * valid, writeable file handle for it was found or because there was
2310 * an error setting it by handle.
2312 if (server->ops->set_path_size)
2313 rc = server->ops->set_path_size(xid, tcon, full_path,
2314 attrs->ia_size, cifs_sb, false);
2317 cifs_dbg(FYI, "SetEOF by path (setattrs) rc = %d\n", rc);
2320 cifs_put_tlink(tlink);
2324 cifsInode->server_eof = attrs->ia_size;
2325 cifs_setsize(inode, attrs->ia_size);
2326 cifs_truncate_page(inode->i_mapping, inode->i_size);
2333 cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
2337 char *full_path = NULL;
2338 struct inode *inode = d_inode(direntry);
2339 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2340 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2341 struct tcon_link *tlink;
2342 struct cifs_tcon *pTcon;
2343 struct cifs_unix_set_info_args *args = NULL;
2344 struct cifsFileInfo *open_file;
2346 cifs_dbg(FYI, "setattr_unix on file %pd attrs->ia_valid=0x%x\n",
2347 direntry, attrs->ia_valid);
2351 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
2352 attrs->ia_valid |= ATTR_FORCE;
2354 rc = setattr_prepare(direntry, attrs);
2358 full_path = build_path_from_dentry(direntry);
2359 if (full_path == NULL) {
2365 * Attempt to flush data before changing attributes. We need to do
2366 * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the
2367 * ownership or mode then we may also need to do this. Here, we take
2368 * the safe way out and just do the flush on all setattr requests. If
2369 * the flush returns error, store it to report later and continue.
2371 * BB: This should be smarter. Why bother flushing pages that
2372 * will be truncated anyway? Also, should we error out here if
2373 * the flush returns error?
2375 rc = filemap_write_and_wait(inode->i_mapping);
2376 if (is_interrupt_error(rc)) {
2381 mapping_set_error(inode->i_mapping, rc);
2384 if (attrs->ia_valid & ATTR_SIZE) {
2385 rc = cifs_set_file_size(inode, attrs, xid, full_path);
2390 /* skip mode change if it's just for clearing setuid/setgid */
2391 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
2392 attrs->ia_valid &= ~ATTR_MODE;
2394 args = kmalloc(sizeof(*args), GFP_KERNEL);
2400 /* set up the struct */
2401 if (attrs->ia_valid & ATTR_MODE)
2402 args->mode = attrs->ia_mode;
2404 args->mode = NO_CHANGE_64;
2406 if (attrs->ia_valid & ATTR_UID)
2407 args->uid = attrs->ia_uid;
2409 args->uid = INVALID_UID; /* no change */
2411 if (attrs->ia_valid & ATTR_GID)
2412 args->gid = attrs->ia_gid;
2414 args->gid = INVALID_GID; /* no change */
2416 if (attrs->ia_valid & ATTR_ATIME)
2417 args->atime = cifs_UnixTimeToNT(attrs->ia_atime);
2419 args->atime = NO_CHANGE_64;
2421 if (attrs->ia_valid & ATTR_MTIME)
2422 args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime);
2424 args->mtime = NO_CHANGE_64;
2426 if (attrs->ia_valid & ATTR_CTIME)
2427 args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime);
2429 args->ctime = NO_CHANGE_64;
2432 open_file = find_writable_file(cifsInode, true);
2434 u16 nfid = open_file->fid.netfid;
2435 u32 npid = open_file->pid;
2436 pTcon = tlink_tcon(open_file->tlink);
2437 rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid);
2438 cifsFileInfo_put(open_file);
2440 tlink = cifs_sb_tlink(cifs_sb);
2441 if (IS_ERR(tlink)) {
2442 rc = PTR_ERR(tlink);
2445 pTcon = tlink_tcon(tlink);
2446 rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args,
2448 cifs_remap(cifs_sb));
2449 cifs_put_tlink(tlink);
2455 if ((attrs->ia_valid & ATTR_SIZE) &&
2456 attrs->ia_size != i_size_read(inode))
2457 truncate_setsize(inode, attrs->ia_size);
2459 setattr_copy(inode, attrs);
2460 mark_inode_dirty(inode);
2462 /* force revalidate when any of these times are set since some
2463 of the fs types (eg ext3, fat) do not have fine enough
2464 time granularity to match protocol, and we do not have a
2465 a way (yet) to query the server fs's time granularity (and
2466 whether it rounds times down).
2468 if (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME))
2469 cifsInode->time = 0;
2478 cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
2481 kuid_t uid = INVALID_UID;
2482 kgid_t gid = INVALID_GID;
2483 struct inode *inode = d_inode(direntry);
2484 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2485 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2486 struct cifsFileInfo *wfile;
2487 struct cifs_tcon *tcon;
2488 char *full_path = NULL;
2491 __u64 mode = NO_CHANGE_64;
2495 cifs_dbg(FYI, "setattr on file %pd attrs->ia_valid 0x%x\n",
2496 direntry, attrs->ia_valid);
2498 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
2499 attrs->ia_valid |= ATTR_FORCE;
2501 rc = setattr_prepare(direntry, attrs);
2507 full_path = build_path_from_dentry(direntry);
2508 if (full_path == NULL) {
2515 * Attempt to flush data before changing attributes. We need to do
2516 * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the
2517 * ownership or mode then we may also need to do this. Here, we take
2518 * the safe way out and just do the flush on all setattr requests. If
2519 * the flush returns error, store it to report later and continue.
2521 * BB: This should be smarter. Why bother flushing pages that
2522 * will be truncated anyway? Also, should we error out here if
2523 * the flush returns error?
2525 rc = filemap_write_and_wait(inode->i_mapping);
2526 if (is_interrupt_error(rc)) {
2528 goto cifs_setattr_exit;
2531 mapping_set_error(inode->i_mapping, rc);
2534 if (attrs->ia_valid & ATTR_MTIME) {
2535 rc = cifs_get_writable_file(cifsInode, false, &wfile);
2537 tcon = tlink_tcon(wfile->tlink);
2538 rc = tcon->ses->server->ops->flush(xid, tcon, &wfile->fid);
2539 cifsFileInfo_put(wfile);
2541 goto cifs_setattr_exit;
2542 } else if (rc != -EBADF)
2543 goto cifs_setattr_exit;
2548 if (attrs->ia_valid & ATTR_SIZE) {
2549 rc = cifs_set_file_size(inode, attrs, xid, full_path);
2551 goto cifs_setattr_exit;
2554 if (attrs->ia_valid & ATTR_UID)
2555 uid = attrs->ia_uid;
2557 if (attrs->ia_valid & ATTR_GID)
2558 gid = attrs->ia_gid;
2560 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) ||
2561 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) {
2562 if (uid_valid(uid) || gid_valid(gid)) {
2563 rc = id_mode_to_cifs_acl(inode, full_path, NO_CHANGE_64,
2566 cifs_dbg(FYI, "%s: Setting id failed with error: %d\n",
2568 goto cifs_setattr_exit;
2572 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID))
2573 attrs->ia_valid &= ~(ATTR_UID | ATTR_GID);
2575 /* skip mode change if it's just for clearing setuid/setgid */
2576 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
2577 attrs->ia_valid &= ~ATTR_MODE;
2579 if (attrs->ia_valid & ATTR_MODE) {
2580 mode = attrs->ia_mode;
2582 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) ||
2583 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) {
2584 rc = id_mode_to_cifs_acl(inode, full_path, mode,
2585 INVALID_UID, INVALID_GID);
2587 cifs_dbg(FYI, "%s: Setting ACL failed with error: %d\n",
2589 goto cifs_setattr_exit;
2592 if (((mode & S_IWUGO) == 0) &&
2593 (cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
2595 dosattr = cifsInode->cifsAttrs | ATTR_READONLY;
2597 /* fix up mode if we're not using dynperm */
2598 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
2599 attrs->ia_mode = inode->i_mode & ~S_IWUGO;
2600 } else if ((mode & S_IWUGO) &&
2601 (cifsInode->cifsAttrs & ATTR_READONLY)) {
2603 dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
2604 /* Attributes of 0 are ignored */
2606 dosattr |= ATTR_NORMAL;
2608 /* reset local inode permissions to normal */
2609 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2610 attrs->ia_mode &= ~(S_IALLUGO);
2611 if (S_ISDIR(inode->i_mode))
2613 cifs_sb->mnt_dir_mode;
2616 cifs_sb->mnt_file_mode;
2618 } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2619 /* ignore mode change - ATTR_READONLY hasn't changed */
2620 attrs->ia_valid &= ~ATTR_MODE;
2624 if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) ||
2625 ((attrs->ia_valid & ATTR_MODE) && dosattr)) {
2626 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
2627 /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */
2629 /* Even if error on time set, no sense failing the call if
2630 the server would set the time to a reasonable value anyway,
2631 and this check ensures that we are not being called from
2632 sys_utimes in which case we ought to fail the call back to
2633 the user when the server rejects the call */
2634 if ((rc) && (attrs->ia_valid &
2635 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
2639 /* do not need local check to inode_check_ok since the server does
2642 goto cifs_setattr_exit;
2644 if ((attrs->ia_valid & ATTR_SIZE) &&
2645 attrs->ia_size != i_size_read(inode))
2646 truncate_setsize(inode, attrs->ia_size);
2648 setattr_copy(inode, attrs);
2649 mark_inode_dirty(inode);
2658 cifs_setattr(struct dentry *direntry, struct iattr *attrs)
2660 struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
2661 struct cifs_tcon *pTcon = cifs_sb_master_tcon(cifs_sb);
2663 if (pTcon->unix_ext)
2664 return cifs_setattr_unix(direntry, attrs);
2666 return cifs_setattr_nounix(direntry, attrs);
2668 /* BB: add cifs_setattr_legacy for really old servers */
2672 void cifs_delete_inode(struct inode *inode)
2674 cifs_dbg(FYI, "In cifs_delete_inode, inode = 0x%p\n", inode);
2675 /* may have to add back in if and when safe distributed caching of
2676 directories added e.g. via FindNotify */