4 * Copyright (C) International Business Machines Corp., 2002,2010
5 * Author(s): Steve French (sfrench@us.ibm.com)
7 * This library is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU Lesser General Public License as published
9 * by the Free Software Foundation; either version 2.1 of the License, or
10 * (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
15 * the GNU Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public License
18 * along with this library; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include <linux/stat.h>
23 #include <linux/slab.h>
24 #include <linux/pagemap.h>
25 #include <linux/freezer.h>
26 #include <linux/sched/signal.h>
27 #include <linux/wait_bit.h>
28 #include <linux/fiemap.h>
30 #include <asm/div64.h>
34 #include "cifsproto.h"
35 #include "cifs_debug.h"
36 #include "cifs_fs_sb.h"
37 #include "cifs_unicode.h"
41 static void cifs_set_ops(struct inode *inode)
43 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
45 switch (inode->i_mode & S_IFMT) {
47 inode->i_op = &cifs_file_inode_ops;
48 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
49 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
50 inode->i_fop = &cifs_file_direct_nobrl_ops;
52 inode->i_fop = &cifs_file_direct_ops;
53 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) {
54 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
55 inode->i_fop = &cifs_file_strict_nobrl_ops;
57 inode->i_fop = &cifs_file_strict_ops;
58 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
59 inode->i_fop = &cifs_file_nobrl_ops;
60 else { /* not direct, send byte range locks */
61 inode->i_fop = &cifs_file_ops;
64 /* check if server can support readpages */
65 if (cifs_sb_master_tcon(cifs_sb)->ses->server->max_read <
66 PAGE_SIZE + MAX_CIFS_HDR_SIZE)
67 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
69 inode->i_data.a_ops = &cifs_addr_ops;
72 #ifdef CONFIG_CIFS_DFS_UPCALL
73 if (IS_AUTOMOUNT(inode)) {
74 inode->i_op = &cifs_dfs_referral_inode_operations;
76 #else /* NO DFS support, treat as a directory */
79 inode->i_op = &cifs_dir_inode_ops;
80 inode->i_fop = &cifs_dir_ops;
84 inode->i_op = &cifs_symlink_inode_ops;
87 init_special_inode(inode, inode->i_mode, inode->i_rdev);
92 /* check inode attributes against fattr. If they don't match, tag the
93 * inode for cache invalidation
96 cifs_revalidate_cache(struct inode *inode, struct cifs_fattr *fattr)
98 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
100 cifs_dbg(FYI, "%s: revalidating inode %llu\n",
101 __func__, cifs_i->uniqueid);
103 if (inode->i_state & I_NEW) {
104 cifs_dbg(FYI, "%s: inode %llu is new\n",
105 __func__, cifs_i->uniqueid);
109 /* don't bother with revalidation if we have an oplock */
110 if (CIFS_CACHE_READ(cifs_i)) {
111 cifs_dbg(FYI, "%s: inode %llu is oplocked\n",
112 __func__, cifs_i->uniqueid);
116 /* revalidate if mtime or size have changed */
117 fattr->cf_mtime = timestamp_truncate(fattr->cf_mtime, inode);
118 if (timespec64_equal(&inode->i_mtime, &fattr->cf_mtime) &&
119 cifs_i->server_eof == fattr->cf_eof) {
120 cifs_dbg(FYI, "%s: inode %llu is unchanged\n",
121 __func__, cifs_i->uniqueid);
125 cifs_dbg(FYI, "%s: invalidating inode %llu mapping\n",
126 __func__, cifs_i->uniqueid);
127 set_bit(CIFS_INO_INVALID_MAPPING, &cifs_i->flags);
131 * copy nlink to the inode, unless it wasn't provided. Provide
132 * sane values if we don't have an existing one and none was provided
135 cifs_nlink_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr)
138 * if we're in a situation where we can't trust what we
139 * got from the server (readdir, some non-unix cases)
140 * fake reasonable values
142 if (fattr->cf_flags & CIFS_FATTR_UNKNOWN_NLINK) {
143 /* only provide fake values on a new inode */
144 if (inode->i_state & I_NEW) {
145 if (fattr->cf_cifsattrs & ATTR_DIRECTORY)
153 /* we trust the server, so update it */
154 set_nlink(inode, fattr->cf_nlink);
157 /* populate an inode with info from a cifs_fattr struct */
159 cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr)
161 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
162 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
164 cifs_revalidate_cache(inode, fattr);
166 spin_lock(&inode->i_lock);
167 fattr->cf_mtime = timestamp_truncate(fattr->cf_mtime, inode);
168 fattr->cf_atime = timestamp_truncate(fattr->cf_atime, inode);
169 fattr->cf_ctime = timestamp_truncate(fattr->cf_ctime, inode);
170 /* we do not want atime to be less than mtime, it broke some apps */
171 if (timespec64_compare(&fattr->cf_atime, &fattr->cf_mtime) < 0)
172 inode->i_atime = fattr->cf_mtime;
174 inode->i_atime = fattr->cf_atime;
175 inode->i_mtime = fattr->cf_mtime;
176 inode->i_ctime = fattr->cf_ctime;
177 inode->i_rdev = fattr->cf_rdev;
178 cifs_nlink_fattr_to_inode(inode, fattr);
179 inode->i_uid = fattr->cf_uid;
180 inode->i_gid = fattr->cf_gid;
182 /* if dynperm is set, don't clobber existing mode */
183 if (inode->i_state & I_NEW ||
184 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM))
185 inode->i_mode = fattr->cf_mode;
187 cifs_i->cifsAttrs = fattr->cf_cifsattrs;
189 if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL)
192 cifs_i->time = jiffies;
194 if (fattr->cf_flags & CIFS_FATTR_DELETE_PENDING)
195 set_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags);
197 clear_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags);
199 cifs_i->server_eof = fattr->cf_eof;
201 * Can't safely change the file size here if the client is writing to
202 * it due to potential races.
204 if (is_size_safe_to_change(cifs_i, fattr->cf_eof)) {
205 i_size_write(inode, fattr->cf_eof);
208 * i_blocks is not related to (i_size / i_blksize),
209 * but instead 512 byte (2**9) size is required for
210 * calculating num blocks.
212 inode->i_blocks = (512 - 1 + fattr->cf_bytes) >> 9;
214 spin_unlock(&inode->i_lock);
216 if (fattr->cf_flags & CIFS_FATTR_DFS_REFERRAL)
217 inode->i_flags |= S_AUTOMOUNT;
218 if (inode->i_state & I_NEW)
223 cifs_fill_uniqueid(struct super_block *sb, struct cifs_fattr *fattr)
225 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
227 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
230 fattr->cf_uniqueid = iunique(sb, ROOT_I);
233 /* Fill a cifs_fattr struct with info from FILE_UNIX_BASIC_INFO. */
235 cifs_unix_basic_to_fattr(struct cifs_fattr *fattr, FILE_UNIX_BASIC_INFO *info,
236 struct cifs_sb_info *cifs_sb)
238 memset(fattr, 0, sizeof(*fattr));
239 fattr->cf_uniqueid = le64_to_cpu(info->UniqueId);
240 fattr->cf_bytes = le64_to_cpu(info->NumOfBytes);
241 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
243 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
244 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastModificationTime);
245 fattr->cf_ctime = cifs_NTtimeToUnix(info->LastStatusChange);
246 /* old POSIX extensions don't get create time */
248 fattr->cf_mode = le64_to_cpu(info->Permissions);
251 * Since we set the inode type below we need to mask off
252 * to avoid strange results if bits set above.
254 fattr->cf_mode &= ~S_IFMT;
255 switch (le32_to_cpu(info->Type)) {
257 fattr->cf_mode |= S_IFREG;
258 fattr->cf_dtype = DT_REG;
261 fattr->cf_mode |= S_IFLNK;
262 fattr->cf_dtype = DT_LNK;
265 fattr->cf_mode |= S_IFDIR;
266 fattr->cf_dtype = DT_DIR;
269 fattr->cf_mode |= S_IFCHR;
270 fattr->cf_dtype = DT_CHR;
271 fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor),
272 le64_to_cpu(info->DevMinor) & MINORMASK);
275 fattr->cf_mode |= S_IFBLK;
276 fattr->cf_dtype = DT_BLK;
277 fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor),
278 le64_to_cpu(info->DevMinor) & MINORMASK);
281 fattr->cf_mode |= S_IFIFO;
282 fattr->cf_dtype = DT_FIFO;
285 fattr->cf_mode |= S_IFSOCK;
286 fattr->cf_dtype = DT_SOCK;
289 /* safest to call it a file if we do not know */
290 fattr->cf_mode |= S_IFREG;
291 fattr->cf_dtype = DT_REG;
292 cifs_dbg(FYI, "unknown type %d\n", le32_to_cpu(info->Type));
296 fattr->cf_uid = cifs_sb->mnt_uid;
297 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)) {
298 u64 id = le64_to_cpu(info->Uid);
299 if (id < ((uid_t)-1)) {
300 kuid_t uid = make_kuid(&init_user_ns, id);
306 fattr->cf_gid = cifs_sb->mnt_gid;
307 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)) {
308 u64 id = le64_to_cpu(info->Gid);
309 if (id < ((gid_t)-1)) {
310 kgid_t gid = make_kgid(&init_user_ns, id);
316 fattr->cf_nlink = le64_to_cpu(info->Nlinks);
320 * Fill a cifs_fattr struct with fake inode info.
322 * Needed to setup cifs_fattr data for the directory which is the
323 * junction to the new submount (ie to setup the fake directory
324 * which represents a DFS referral).
327 cifs_create_dfs_fattr(struct cifs_fattr *fattr, struct super_block *sb)
329 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
331 cifs_dbg(FYI, "creating fake fattr for DFS referral\n");
333 memset(fattr, 0, sizeof(*fattr));
334 fattr->cf_mode = S_IFDIR | S_IXUGO | S_IRWXU;
335 fattr->cf_uid = cifs_sb->mnt_uid;
336 fattr->cf_gid = cifs_sb->mnt_gid;
337 ktime_get_coarse_real_ts64(&fattr->cf_mtime);
338 fattr->cf_atime = fattr->cf_ctime = fattr->cf_mtime;
340 fattr->cf_flags = CIFS_FATTR_DFS_REFERRAL;
344 cifs_get_file_info_unix(struct file *filp)
348 FILE_UNIX_BASIC_INFO find_data;
349 struct cifs_fattr fattr;
350 struct inode *inode = file_inode(filp);
351 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
352 struct cifsFileInfo *cfile = filp->private_data;
353 struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
356 rc = CIFSSMBUnixQFileInfo(xid, tcon, cfile->fid.netfid, &find_data);
358 cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb);
359 } else if (rc == -EREMOTE) {
360 cifs_create_dfs_fattr(&fattr, inode->i_sb);
364 cifs_fattr_to_inode(inode, &fattr);
369 int cifs_get_inode_info_unix(struct inode **pinode,
370 const unsigned char *full_path,
371 struct super_block *sb, unsigned int xid)
374 FILE_UNIX_BASIC_INFO find_data;
375 struct cifs_fattr fattr;
376 struct cifs_tcon *tcon;
377 struct tcon_link *tlink;
378 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
380 cifs_dbg(FYI, "Getting info on %s\n", full_path);
382 tlink = cifs_sb_tlink(cifs_sb);
384 return PTR_ERR(tlink);
385 tcon = tlink_tcon(tlink);
387 /* could have done a find first instead but this returns more info */
388 rc = CIFSSMBUnixQPathInfo(xid, tcon, full_path, &find_data,
389 cifs_sb->local_nls, cifs_remap(cifs_sb));
390 cifs_put_tlink(tlink);
393 cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb);
394 } else if (rc == -EREMOTE) {
395 cifs_create_dfs_fattr(&fattr, sb);
401 /* check for Minshall+French symlinks */
402 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
403 int tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr,
406 cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc);
409 if (*pinode == NULL) {
411 cifs_fill_uniqueid(sb, &fattr);
412 *pinode = cifs_iget(sb, &fattr);
416 /* we already have inode, update it */
418 /* if uniqueid is different, return error */
419 if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM &&
420 CIFS_I(*pinode)->uniqueid != fattr.cf_uniqueid)) {
421 CIFS_I(*pinode)->time = 0; /* force reval */
426 /* if filetype is different, return error */
427 if (unlikely(((*pinode)->i_mode & S_IFMT) !=
428 (fattr.cf_mode & S_IFMT))) {
429 CIFS_I(*pinode)->time = 0; /* force reval */
434 cifs_fattr_to_inode(*pinode, &fattr);
442 cifs_sfu_type(struct cifs_fattr *fattr, const char *path,
443 struct cifs_sb_info *cifs_sb, unsigned int xid)
447 struct tcon_link *tlink;
448 struct cifs_tcon *tcon;
450 struct cifs_open_parms oparms;
451 struct cifs_io_parms io_parms = {0};
453 unsigned int bytes_read;
455 int buf_type = CIFS_NO_BUFFER;
459 fattr->cf_mode &= ~S_IFMT;
461 if (fattr->cf_eof == 0) {
462 fattr->cf_mode |= S_IFIFO;
463 fattr->cf_dtype = DT_FIFO;
465 } else if (fattr->cf_eof < 8) {
466 fattr->cf_mode |= S_IFREG;
467 fattr->cf_dtype = DT_REG;
468 return -EINVAL; /* EOPNOTSUPP? */
471 tlink = cifs_sb_tlink(cifs_sb);
473 return PTR_ERR(tlink);
474 tcon = tlink_tcon(tlink);
477 oparms.cifs_sb = cifs_sb;
478 oparms.desired_access = GENERIC_READ;
479 oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR);
480 oparms.disposition = FILE_OPEN;
483 oparms.reconnect = false;
485 if (tcon->ses->server->oplocks)
489 rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, NULL);
491 cifs_dbg(FYI, "check sfu type of %s, open rc = %d\n", path, rc);
492 cifs_put_tlink(tlink);
497 io_parms.netfid = fid.netfid;
498 io_parms.pid = current->tgid;
499 io_parms.tcon = tcon;
501 io_parms.length = 24;
503 rc = tcon->ses->server->ops->sync_read(xid, &fid, &io_parms,
504 &bytes_read, &pbuf, &buf_type);
505 if ((rc == 0) && (bytes_read >= 8)) {
506 if (memcmp("IntxBLK", pbuf, 8) == 0) {
507 cifs_dbg(FYI, "Block device\n");
508 fattr->cf_mode |= S_IFBLK;
509 fattr->cf_dtype = DT_BLK;
510 if (bytes_read == 24) {
511 /* we have enough to decode dev num */
512 __u64 mjr; /* major */
513 __u64 mnr; /* minor */
514 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
515 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
516 fattr->cf_rdev = MKDEV(mjr, mnr);
518 } else if (memcmp("IntxCHR", pbuf, 8) == 0) {
519 cifs_dbg(FYI, "Char device\n");
520 fattr->cf_mode |= S_IFCHR;
521 fattr->cf_dtype = DT_CHR;
522 if (bytes_read == 24) {
523 /* we have enough to decode dev num */
524 __u64 mjr; /* major */
525 __u64 mnr; /* minor */
526 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
527 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
528 fattr->cf_rdev = MKDEV(mjr, mnr);
530 } else if (memcmp("IntxLNK", pbuf, 7) == 0) {
531 cifs_dbg(FYI, "Symlink\n");
532 fattr->cf_mode |= S_IFLNK;
533 fattr->cf_dtype = DT_LNK;
535 fattr->cf_mode |= S_IFREG; /* file? */
536 fattr->cf_dtype = DT_REG;
540 fattr->cf_mode |= S_IFREG; /* then it is a file */
541 fattr->cf_dtype = DT_REG;
542 rc = -EOPNOTSUPP; /* or some unknown SFU type */
545 tcon->ses->server->ops->close(xid, tcon, &fid);
546 cifs_put_tlink(tlink);
550 #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
553 * Fetch mode bits as provided by SFU.
555 * FIXME: Doesn't this clobber the type bit we got from cifs_sfu_type ?
557 static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path,
558 struct cifs_sb_info *cifs_sb, unsigned int xid)
560 #ifdef CONFIG_CIFS_XATTR
564 struct tcon_link *tlink;
565 struct cifs_tcon *tcon;
567 tlink = cifs_sb_tlink(cifs_sb);
569 return PTR_ERR(tlink);
570 tcon = tlink_tcon(tlink);
572 if (tcon->ses->server->ops->query_all_EAs == NULL) {
573 cifs_put_tlink(tlink);
577 rc = tcon->ses->server->ops->query_all_EAs(xid, tcon, path,
578 "SETFILEBITS", ea_value, 4 /* size of buf */,
580 cifs_put_tlink(tlink);
584 mode = le32_to_cpu(*((__le32 *)ea_value));
585 fattr->cf_mode &= ~SFBITS_MASK;
586 cifs_dbg(FYI, "special bits 0%o org mode 0%o\n",
587 mode, fattr->cf_mode);
588 fattr->cf_mode = (mode & SFBITS_MASK) | fattr->cf_mode;
589 cifs_dbg(FYI, "special mode bits 0%o\n", mode);
598 /* Fill a cifs_fattr struct with info from FILE_ALL_INFO */
600 cifs_all_info_to_fattr(struct cifs_fattr *fattr, FILE_ALL_INFO *info,
601 struct super_block *sb, bool adjust_tz,
604 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
605 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
607 memset(fattr, 0, sizeof(*fattr));
608 fattr->cf_cifsattrs = le32_to_cpu(info->Attributes);
609 if (info->DeletePending)
610 fattr->cf_flags |= CIFS_FATTR_DELETE_PENDING;
612 if (info->LastAccessTime)
613 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
615 ktime_get_coarse_real_ts64(&fattr->cf_atime);
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(VFS, "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 (EACCES) 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\n");
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 = cifs_create_options(cifs_sb, 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 if (tcon->nodelete) {
1427 /* Unlink can be called from rename so we can not take the
1428 * sb->s_vfs_rename_mutex here */
1429 full_path = build_path_from_dentry(dentry);
1430 if (full_path == NULL) {
1435 if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1436 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1437 rc = CIFSPOSIXDelFile(xid, tcon, full_path,
1438 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
1439 cifs_remap(cifs_sb));
1440 cifs_dbg(FYI, "posix del rc %d\n", rc);
1441 if ((rc == 0) || (rc == -ENOENT))
1442 goto psx_del_no_retry;
1446 if (!server->ops->unlink) {
1448 goto psx_del_no_retry;
1451 rc = server->ops->unlink(xid, tcon, full_path, cifs_sb);
1456 cifs_drop_nlink(inode);
1457 } else if (rc == -ENOENT) {
1459 } else if (rc == -EBUSY) {
1460 if (server->ops->rename_pending_delete) {
1461 rc = server->ops->rename_pending_delete(full_path,
1464 cifs_drop_nlink(inode);
1466 } else if ((rc == -EACCES) && (dosattr == 0) && inode) {
1467 attrs = kzalloc(sizeof(*attrs), GFP_KERNEL);
1468 if (attrs == NULL) {
1473 /* try to reset dos attributes */
1474 cifs_inode = CIFS_I(inode);
1475 origattr = cifs_inode->cifsAttrs;
1477 origattr |= ATTR_NORMAL;
1478 dosattr = origattr & ~ATTR_READONLY;
1480 dosattr |= ATTR_NORMAL;
1481 dosattr |= ATTR_HIDDEN;
1483 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
1487 goto retry_std_delete;
1490 /* undo the setattr if we errored out and it's needed */
1491 if (rc != 0 && dosattr != 0)
1492 cifs_set_file_info(inode, attrs, xid, full_path, origattr);
1496 cifs_inode = CIFS_I(inode);
1497 cifs_inode->time = 0; /* will force revalidate to get info
1499 inode->i_ctime = current_time(inode);
1501 dir->i_ctime = dir->i_mtime = current_time(dir);
1502 cifs_inode = CIFS_I(dir);
1503 CIFS_I(dir)->time = 0; /* force revalidate of dir as well */
1508 cifs_put_tlink(tlink);
1513 cifs_mkdir_qinfo(struct inode *parent, struct dentry *dentry, umode_t mode,
1514 const char *full_path, struct cifs_sb_info *cifs_sb,
1515 struct cifs_tcon *tcon, const unsigned int xid)
1518 struct inode *inode = NULL;
1521 rc = cifs_get_inode_info_unix(&inode, full_path, parent->i_sb,
1524 rc = cifs_get_inode_info(&inode, full_path, NULL, parent->i_sb,
1531 * setting nlink not necessary except in cases where we failed to get it
1532 * from the server or was set bogus. Also, since this is a brand new
1533 * inode, no need to grab the i_lock before setting the i_nlink.
1535 if (inode->i_nlink < 2)
1536 set_nlink(inode, 2);
1537 mode &= ~current_umask();
1538 /* must turn on setgid bit if parent dir has it */
1539 if (parent->i_mode & S_ISGID)
1542 if (tcon->unix_ext) {
1543 struct cifs_unix_set_info_args args = {
1545 .ctime = NO_CHANGE_64,
1546 .atime = NO_CHANGE_64,
1547 .mtime = NO_CHANGE_64,
1550 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1551 args.uid = current_fsuid();
1552 if (parent->i_mode & S_ISGID)
1553 args.gid = parent->i_gid;
1555 args.gid = current_fsgid();
1557 args.uid = INVALID_UID; /* no change */
1558 args.gid = INVALID_GID; /* no change */
1560 CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args,
1562 cifs_remap(cifs_sb));
1564 struct TCP_Server_Info *server = tcon->ses->server;
1565 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
1566 (mode & S_IWUGO) == 0 && server->ops->mkdir_setinfo)
1567 server->ops->mkdir_setinfo(inode, full_path, cifs_sb,
1569 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
1570 inode->i_mode = (mode | S_IFDIR);
1572 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1573 inode->i_uid = current_fsuid();
1574 if (inode->i_mode & S_ISGID)
1575 inode->i_gid = parent->i_gid;
1577 inode->i_gid = current_fsgid();
1580 d_instantiate(dentry, inode);
1585 cifs_posix_mkdir(struct inode *inode, struct dentry *dentry, umode_t mode,
1586 const char *full_path, struct cifs_sb_info *cifs_sb,
1587 struct cifs_tcon *tcon, const unsigned int xid)
1591 FILE_UNIX_BASIC_INFO *info = NULL;
1592 struct inode *newinode = NULL;
1593 struct cifs_fattr fattr;
1595 info = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1598 goto posix_mkdir_out;
1601 mode &= ~current_umask();
1602 rc = CIFSPOSIXCreate(xid, tcon, SMB_O_DIRECTORY | SMB_O_CREAT, mode,
1603 NULL /* netfid */, info, &oplock, full_path,
1604 cifs_sb->local_nls, cifs_remap(cifs_sb));
1605 if (rc == -EOPNOTSUPP)
1606 goto posix_mkdir_out;
1608 cifs_dbg(FYI, "posix mkdir returned 0x%x\n", rc);
1610 goto posix_mkdir_out;
1613 if (info->Type == cpu_to_le32(-1))
1614 /* no return info, go query for it */
1615 goto posix_mkdir_get_info;
1617 * BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if
1618 * need to set uid/gid.
1621 cifs_unix_basic_to_fattr(&fattr, info, cifs_sb);
1622 cifs_fill_uniqueid(inode->i_sb, &fattr);
1623 newinode = cifs_iget(inode->i_sb, &fattr);
1625 goto posix_mkdir_get_info;
1627 d_instantiate(dentry, newinode);
1629 #ifdef CONFIG_CIFS_DEBUG2
1630 cifs_dbg(FYI, "instantiated dentry %p %pd to inode %p\n",
1631 dentry, dentry, newinode);
1633 if (newinode->i_nlink != 2)
1634 cifs_dbg(FYI, "unexpected number of links %d\n",
1641 posix_mkdir_get_info:
1642 rc = cifs_mkdir_qinfo(inode, dentry, mode, full_path, cifs_sb, tcon,
1644 goto posix_mkdir_out;
1647 int cifs_mkdir(struct inode *inode, struct dentry *direntry, umode_t mode)
1651 struct cifs_sb_info *cifs_sb;
1652 struct tcon_link *tlink;
1653 struct cifs_tcon *tcon;
1654 struct TCP_Server_Info *server;
1657 cifs_dbg(FYI, "In cifs_mkdir, mode = %04ho inode = 0x%p\n",
1660 cifs_sb = CIFS_SB(inode->i_sb);
1661 tlink = cifs_sb_tlink(cifs_sb);
1663 return PTR_ERR(tlink);
1664 tcon = tlink_tcon(tlink);
1668 full_path = build_path_from_dentry(direntry);
1669 if (full_path == NULL) {
1674 server = tcon->ses->server;
1676 if ((server->ops->posix_mkdir) && (tcon->posix_extensions)) {
1677 rc = server->ops->posix_mkdir(xid, inode, mode, tcon, full_path,
1679 d_drop(direntry); /* for time being always refresh inode info */
1683 if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
1684 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1685 rc = cifs_posix_mkdir(inode, direntry, mode, full_path, cifs_sb,
1687 if (rc != -EOPNOTSUPP)
1691 if (!server->ops->mkdir) {
1696 /* BB add setting the equivalent of mode via CreateX w/ACLs */
1697 rc = server->ops->mkdir(xid, inode, mode, tcon, full_path, cifs_sb);
1699 cifs_dbg(FYI, "cifs_mkdir returned 0x%x\n", rc);
1704 /* TODO: skip this for smb2/smb3 */
1705 rc = cifs_mkdir_qinfo(inode, direntry, mode, full_path, cifs_sb, tcon,
1709 * Force revalidate to get parent dir info when needed since cached
1710 * attributes are invalid now.
1712 CIFS_I(inode)->time = 0;
1715 cifs_put_tlink(tlink);
1719 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1723 struct cifs_sb_info *cifs_sb;
1724 struct tcon_link *tlink;
1725 struct cifs_tcon *tcon;
1726 struct TCP_Server_Info *server;
1727 char *full_path = NULL;
1728 struct cifsInodeInfo *cifsInode;
1730 cifs_dbg(FYI, "cifs_rmdir, inode = 0x%p\n", inode);
1734 full_path = build_path_from_dentry(direntry);
1735 if (full_path == NULL) {
1740 cifs_sb = CIFS_SB(inode->i_sb);
1741 tlink = cifs_sb_tlink(cifs_sb);
1742 if (IS_ERR(tlink)) {
1743 rc = PTR_ERR(tlink);
1746 tcon = tlink_tcon(tlink);
1747 server = tcon->ses->server;
1749 if (!server->ops->rmdir) {
1751 cifs_put_tlink(tlink);
1755 if (tcon->nodelete) {
1757 cifs_put_tlink(tlink);
1761 rc = server->ops->rmdir(xid, tcon, full_path, cifs_sb);
1762 cifs_put_tlink(tlink);
1765 spin_lock(&d_inode(direntry)->i_lock);
1766 i_size_write(d_inode(direntry), 0);
1767 clear_nlink(d_inode(direntry));
1768 spin_unlock(&d_inode(direntry)->i_lock);
1771 cifsInode = CIFS_I(d_inode(direntry));
1772 /* force revalidate to go get info when needed */
1773 cifsInode->time = 0;
1775 cifsInode = CIFS_I(inode);
1777 * Force revalidate to get parent dir info when needed since cached
1778 * attributes are invalid now.
1780 cifsInode->time = 0;
1782 d_inode(direntry)->i_ctime = inode->i_ctime = inode->i_mtime =
1783 current_time(inode);
1792 cifs_do_rename(const unsigned int xid, struct dentry *from_dentry,
1793 const char *from_path, struct dentry *to_dentry,
1794 const char *to_path)
1796 struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb);
1797 struct tcon_link *tlink;
1798 struct cifs_tcon *tcon;
1799 struct TCP_Server_Info *server;
1800 struct cifs_fid fid;
1801 struct cifs_open_parms oparms;
1804 tlink = cifs_sb_tlink(cifs_sb);
1806 return PTR_ERR(tlink);
1807 tcon = tlink_tcon(tlink);
1808 server = tcon->ses->server;
1810 if (!server->ops->rename)
1813 /* try path-based rename first */
1814 rc = server->ops->rename(xid, tcon, from_path, to_path, cifs_sb);
1817 * Don't bother with rename by filehandle unless file is busy and
1818 * source. Note that cross directory moves do not work with
1819 * rename by filehandle to various Windows servers.
1821 if (rc == 0 || rc != -EBUSY)
1822 goto do_rename_exit;
1824 /* Don't fall back to using SMB on SMB 2+ mount */
1825 if (server->vals->protocol_id != 0)
1826 goto do_rename_exit;
1828 /* open-file renames don't work across directories */
1829 if (to_dentry->d_parent != from_dentry->d_parent)
1830 goto do_rename_exit;
1833 oparms.cifs_sb = cifs_sb;
1834 /* open the file to be renamed -- we need DELETE perms */
1835 oparms.desired_access = DELETE;
1836 oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR);
1837 oparms.disposition = FILE_OPEN;
1838 oparms.path = from_path;
1840 oparms.reconnect = false;
1842 rc = CIFS_open(xid, &oparms, &oplock, NULL);
1844 rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid,
1845 (const char *) to_dentry->d_name.name,
1846 cifs_sb->local_nls, cifs_remap(cifs_sb));
1847 CIFSSMBClose(xid, tcon, fid.netfid);
1851 d_move(from_dentry, to_dentry);
1852 cifs_put_tlink(tlink);
1857 cifs_rename2(struct inode *source_dir, struct dentry *source_dentry,
1858 struct inode *target_dir, struct dentry *target_dentry,
1861 char *from_name = NULL;
1862 char *to_name = NULL;
1863 struct cifs_sb_info *cifs_sb;
1864 struct tcon_link *tlink;
1865 struct cifs_tcon *tcon;
1866 FILE_UNIX_BASIC_INFO *info_buf_source = NULL;
1867 FILE_UNIX_BASIC_INFO *info_buf_target;
1871 if (flags & ~RENAME_NOREPLACE)
1874 cifs_sb = CIFS_SB(source_dir->i_sb);
1875 tlink = cifs_sb_tlink(cifs_sb);
1877 return PTR_ERR(tlink);
1878 tcon = tlink_tcon(tlink);
1883 * we already have the rename sem so we do not need to
1884 * grab it again here to protect the path integrity
1886 from_name = build_path_from_dentry(source_dentry);
1887 if (from_name == NULL) {
1889 goto cifs_rename_exit;
1892 to_name = build_path_from_dentry(target_dentry);
1893 if (to_name == NULL) {
1895 goto cifs_rename_exit;
1898 rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry,
1902 * No-replace is the natural behavior for CIFS, so skip unlink hacks.
1904 if (flags & RENAME_NOREPLACE)
1905 goto cifs_rename_exit;
1907 if (rc == -EEXIST && tcon->unix_ext) {
1909 * Are src and dst hardlinks of same inode? We can only tell
1910 * with unix extensions enabled.
1913 kmalloc_array(2, sizeof(FILE_UNIX_BASIC_INFO),
1915 if (info_buf_source == NULL) {
1917 goto cifs_rename_exit;
1920 info_buf_target = info_buf_source + 1;
1921 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, from_name,
1924 cifs_remap(cifs_sb));
1928 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, to_name,
1931 cifs_remap(cifs_sb));
1933 if (tmprc == 0 && (info_buf_source->UniqueId ==
1934 info_buf_target->UniqueId)) {
1935 /* same file, POSIX says that this is a noop */
1937 goto cifs_rename_exit;
1941 * else ... BB we could add the same check for Windows by
1942 * checking the UniqueId via FILE_INTERNAL_INFO
1946 /* Try unlinking the target dentry if it's not negative */
1947 if (d_really_is_positive(target_dentry) && (rc == -EACCES || rc == -EEXIST)) {
1948 if (d_is_dir(target_dentry))
1949 tmprc = cifs_rmdir(target_dir, target_dentry);
1951 tmprc = cifs_unlink(target_dir, target_dentry);
1953 goto cifs_rename_exit;
1954 rc = cifs_do_rename(xid, source_dentry, from_name,
1955 target_dentry, to_name);
1958 /* force revalidate to go get info when needed */
1959 CIFS_I(source_dir)->time = CIFS_I(target_dir)->time = 0;
1961 source_dir->i_ctime = source_dir->i_mtime = target_dir->i_ctime =
1962 target_dir->i_mtime = current_time(source_dir);
1965 kfree(info_buf_source);
1969 cifs_put_tlink(tlink);
1974 cifs_inode_needs_reval(struct inode *inode)
1976 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
1977 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1979 if (cifs_i->time == 0)
1982 if (CIFS_CACHE_READ(cifs_i))
1985 if (!lookupCacheEnabled)
1988 if (!cifs_sb->actimeo)
1991 if (!time_in_range(jiffies, cifs_i->time,
1992 cifs_i->time + cifs_sb->actimeo))
1995 /* hardlinked files w/ noserverino get "special" treatment */
1996 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) &&
1997 S_ISREG(inode->i_mode) && inode->i_nlink != 1)
2004 * Zap the cache. Called when invalid_mapping flag is set.
2007 cifs_invalidate_mapping(struct inode *inode)
2011 if (inode->i_mapping && inode->i_mapping->nrpages != 0) {
2012 rc = invalidate_inode_pages2(inode->i_mapping);
2014 cifs_dbg(VFS, "%s: Could not invalidate inode %p\n",
2018 cifs_fscache_reset_inode_cookie(inode);
2023 * cifs_wait_bit_killable - helper for functions that are sleeping on bit locks
2024 * @word: long word containing the bit lock
2027 cifs_wait_bit_killable(struct wait_bit_key *key, int mode)
2029 freezable_schedule_unsafe();
2030 if (signal_pending_state(mode, current))
2031 return -ERESTARTSYS;
2036 cifs_revalidate_mapping(struct inode *inode)
2039 unsigned long *flags = &CIFS_I(inode)->flags;
2041 /* swapfiles are not supposed to be shared */
2042 if (IS_SWAPFILE(inode))
2045 rc = wait_on_bit_lock_action(flags, CIFS_INO_LOCK, cifs_wait_bit_killable,
2050 if (test_and_clear_bit(CIFS_INO_INVALID_MAPPING, flags)) {
2051 rc = cifs_invalidate_mapping(inode);
2053 set_bit(CIFS_INO_INVALID_MAPPING, flags);
2056 clear_bit_unlock(CIFS_INO_LOCK, flags);
2057 smp_mb__after_atomic();
2058 wake_up_bit(flags, CIFS_INO_LOCK);
2064 cifs_zap_mapping(struct inode *inode)
2066 set_bit(CIFS_INO_INVALID_MAPPING, &CIFS_I(inode)->flags);
2067 return cifs_revalidate_mapping(inode);
2070 int cifs_revalidate_file_attr(struct file *filp)
2073 struct inode *inode = file_inode(filp);
2074 struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data;
2076 if (!cifs_inode_needs_reval(inode))
2079 if (tlink_tcon(cfile->tlink)->unix_ext)
2080 rc = cifs_get_file_info_unix(filp);
2082 rc = cifs_get_file_info(filp);
2087 int cifs_revalidate_dentry_attr(struct dentry *dentry)
2091 struct inode *inode = d_inode(dentry);
2092 struct super_block *sb = dentry->d_sb;
2093 char *full_path = NULL;
2099 if (!cifs_inode_needs_reval(inode))
2104 /* can not safely grab the rename sem here if rename calls revalidate
2105 since that would deadlock */
2106 full_path = build_path_from_dentry(dentry);
2107 if (full_path == NULL) {
2112 cifs_dbg(FYI, "Update attributes: %s inode 0x%p count %d dentry: 0x%p d_time %ld jiffies %ld\n",
2113 full_path, inode, inode->i_count.counter,
2114 dentry, cifs_get_time(dentry), jiffies);
2117 if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext)
2118 rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid);
2120 rc = cifs_get_inode_info(&inode, full_path, NULL, sb,
2122 if (rc == -EAGAIN && count++ < 10)
2131 int cifs_revalidate_file(struct file *filp)
2134 struct inode *inode = file_inode(filp);
2136 rc = cifs_revalidate_file_attr(filp);
2140 return cifs_revalidate_mapping(inode);
2143 /* revalidate a dentry's inode attributes */
2144 int cifs_revalidate_dentry(struct dentry *dentry)
2147 struct inode *inode = d_inode(dentry);
2149 rc = cifs_revalidate_dentry_attr(dentry);
2153 return cifs_revalidate_mapping(inode);
2156 int cifs_getattr(const struct path *path, struct kstat *stat,
2157 u32 request_mask, unsigned int flags)
2159 struct dentry *dentry = path->dentry;
2160 struct cifs_sb_info *cifs_sb = CIFS_SB(dentry->d_sb);
2161 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
2162 struct inode *inode = d_inode(dentry);
2166 * We need to be sure that all dirty pages are written and the server
2167 * has actual ctime, mtime and file length.
2169 if ((request_mask & (STATX_CTIME | STATX_MTIME | STATX_SIZE)) &&
2170 !CIFS_CACHE_READ(CIFS_I(inode)) &&
2171 inode->i_mapping && inode->i_mapping->nrpages != 0) {
2172 rc = filemap_fdatawait(inode->i_mapping);
2174 mapping_set_error(inode->i_mapping, rc);
2179 if ((flags & AT_STATX_SYNC_TYPE) == AT_STATX_FORCE_SYNC)
2180 CIFS_I(inode)->time = 0; /* force revalidate */
2183 * If the caller doesn't require syncing, only sync if
2184 * necessary (e.g. due to earlier truncate or setattr
2185 * invalidating the cached metadata)
2187 if (((flags & AT_STATX_SYNC_TYPE) != AT_STATX_DONT_SYNC) ||
2188 (CIFS_I(inode)->time == 0)) {
2189 rc = cifs_revalidate_dentry_attr(dentry);
2194 generic_fillattr(inode, stat);
2195 stat->blksize = cifs_sb->bsize;
2196 stat->ino = CIFS_I(inode)->uniqueid;
2198 /* old CIFS Unix Extensions doesn't return create time */
2199 if (CIFS_I(inode)->createtime) {
2200 stat->result_mask |= STATX_BTIME;
2202 cifs_NTtimeToUnix(cpu_to_le64(CIFS_I(inode)->createtime));
2205 stat->attributes_mask |= (STATX_ATTR_COMPRESSED | STATX_ATTR_ENCRYPTED);
2206 if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_COMPRESSED)
2207 stat->attributes |= STATX_ATTR_COMPRESSED;
2208 if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_ENCRYPTED)
2209 stat->attributes |= STATX_ATTR_ENCRYPTED;
2212 * If on a multiuser mount without unix extensions or cifsacl being
2213 * enabled, and the admin hasn't overridden them, set the ownership
2214 * to the fsuid/fsgid of the current process.
2216 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) &&
2217 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
2219 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID))
2220 stat->uid = current_fsuid();
2221 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID))
2222 stat->gid = current_fsgid();
2227 int cifs_fiemap(struct inode *inode, struct fiemap_extent_info *fei, u64 start,
2230 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2231 struct cifs_sb_info *cifs_sb = CIFS_SB(cifs_i->vfs_inode.i_sb);
2232 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
2233 struct TCP_Server_Info *server = tcon->ses->server;
2234 struct cifsFileInfo *cfile;
2238 * We need to be sure that all dirty pages are written as they
2239 * might fill holes on the server.
2241 if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
2242 inode->i_mapping->nrpages != 0) {
2243 rc = filemap_fdatawait(inode->i_mapping);
2245 mapping_set_error(inode->i_mapping, rc);
2250 cfile = find_readable_file(cifs_i, false);
2254 if (server->ops->fiemap) {
2255 rc = server->ops->fiemap(tcon, cfile, fei, start, len);
2256 cifsFileInfo_put(cfile);
2260 cifsFileInfo_put(cfile);
2264 int cifs_truncate_page(struct address_space *mapping, loff_t from)
2266 pgoff_t index = from >> PAGE_SHIFT;
2267 unsigned offset = from & (PAGE_SIZE - 1);
2271 page = grab_cache_page(mapping, index);
2275 zero_user_segment(page, offset, PAGE_SIZE);
2281 void cifs_setsize(struct inode *inode, loff_t offset)
2283 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
2285 spin_lock(&inode->i_lock);
2286 i_size_write(inode, offset);
2287 spin_unlock(&inode->i_lock);
2289 /* Cached inode must be refreshed on truncate */
2291 truncate_pagecache(inode, offset);
2295 cifs_set_file_size(struct inode *inode, struct iattr *attrs,
2296 unsigned int xid, char *full_path)
2299 struct cifsFileInfo *open_file;
2300 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2301 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2302 struct tcon_link *tlink = NULL;
2303 struct cifs_tcon *tcon = NULL;
2304 struct TCP_Server_Info *server;
2307 * To avoid spurious oplock breaks from server, in the case of
2308 * inodes that we already have open, avoid doing path based
2309 * setting of file size if we can do it by handle.
2310 * This keeps our caching token (oplock) and avoids timeouts
2311 * when the local oplock break takes longer to flush
2312 * writebehind data than the SMB timeout for the SetPathInfo
2313 * request would allow
2315 open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY);
2317 tcon = tlink_tcon(open_file->tlink);
2318 server = tcon->ses->server;
2319 if (server->ops->set_file_size)
2320 rc = server->ops->set_file_size(xid, tcon, open_file,
2321 attrs->ia_size, false);
2324 cifsFileInfo_put(open_file);
2325 cifs_dbg(FYI, "SetFSize for attrs rc = %d\n", rc);
2333 tlink = cifs_sb_tlink(cifs_sb);
2335 return PTR_ERR(tlink);
2336 tcon = tlink_tcon(tlink);
2337 server = tcon->ses->server;
2341 * Set file size by pathname rather than by handle either because no
2342 * valid, writeable file handle for it was found or because there was
2343 * an error setting it by handle.
2345 if (server->ops->set_path_size)
2346 rc = server->ops->set_path_size(xid, tcon, full_path,
2347 attrs->ia_size, cifs_sb, false);
2350 cifs_dbg(FYI, "SetEOF by path (setattrs) rc = %d\n", rc);
2353 cifs_put_tlink(tlink);
2357 cifsInode->server_eof = attrs->ia_size;
2358 cifs_setsize(inode, attrs->ia_size);
2359 cifs_truncate_page(inode->i_mapping, inode->i_size);
2366 cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
2370 char *full_path = NULL;
2371 struct inode *inode = d_inode(direntry);
2372 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2373 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2374 struct tcon_link *tlink;
2375 struct cifs_tcon *pTcon;
2376 struct cifs_unix_set_info_args *args = NULL;
2377 struct cifsFileInfo *open_file;
2379 cifs_dbg(FYI, "setattr_unix on file %pd attrs->ia_valid=0x%x\n",
2380 direntry, attrs->ia_valid);
2384 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
2385 attrs->ia_valid |= ATTR_FORCE;
2387 rc = setattr_prepare(direntry, attrs);
2391 full_path = build_path_from_dentry(direntry);
2392 if (full_path == NULL) {
2398 * Attempt to flush data before changing attributes. We need to do
2399 * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the
2400 * ownership or mode then we may also need to do this. Here, we take
2401 * the safe way out and just do the flush on all setattr requests. If
2402 * the flush returns error, store it to report later and continue.
2404 * BB: This should be smarter. Why bother flushing pages that
2405 * will be truncated anyway? Also, should we error out here if
2406 * the flush returns error?
2408 rc = filemap_write_and_wait(inode->i_mapping);
2409 if (is_interrupt_error(rc)) {
2414 mapping_set_error(inode->i_mapping, rc);
2417 if (attrs->ia_valid & ATTR_SIZE) {
2418 rc = cifs_set_file_size(inode, attrs, xid, full_path);
2423 /* skip mode change if it's just for clearing setuid/setgid */
2424 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
2425 attrs->ia_valid &= ~ATTR_MODE;
2427 args = kmalloc(sizeof(*args), GFP_KERNEL);
2433 /* set up the struct */
2434 if (attrs->ia_valid & ATTR_MODE)
2435 args->mode = attrs->ia_mode;
2437 args->mode = NO_CHANGE_64;
2439 if (attrs->ia_valid & ATTR_UID)
2440 args->uid = attrs->ia_uid;
2442 args->uid = INVALID_UID; /* no change */
2444 if (attrs->ia_valid & ATTR_GID)
2445 args->gid = attrs->ia_gid;
2447 args->gid = INVALID_GID; /* no change */
2449 if (attrs->ia_valid & ATTR_ATIME)
2450 args->atime = cifs_UnixTimeToNT(attrs->ia_atime);
2452 args->atime = NO_CHANGE_64;
2454 if (attrs->ia_valid & ATTR_MTIME)
2455 args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime);
2457 args->mtime = NO_CHANGE_64;
2459 if (attrs->ia_valid & ATTR_CTIME)
2460 args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime);
2462 args->ctime = NO_CHANGE_64;
2465 open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY);
2467 u16 nfid = open_file->fid.netfid;
2468 u32 npid = open_file->pid;
2469 pTcon = tlink_tcon(open_file->tlink);
2470 rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid);
2471 cifsFileInfo_put(open_file);
2473 tlink = cifs_sb_tlink(cifs_sb);
2474 if (IS_ERR(tlink)) {
2475 rc = PTR_ERR(tlink);
2478 pTcon = tlink_tcon(tlink);
2479 rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args,
2481 cifs_remap(cifs_sb));
2482 cifs_put_tlink(tlink);
2488 if ((attrs->ia_valid & ATTR_SIZE) &&
2489 attrs->ia_size != i_size_read(inode))
2490 truncate_setsize(inode, attrs->ia_size);
2492 setattr_copy(inode, attrs);
2493 mark_inode_dirty(inode);
2495 /* force revalidate when any of these times are set since some
2496 of the fs types (eg ext3, fat) do not have fine enough
2497 time granularity to match protocol, and we do not have a
2498 a way (yet) to query the server fs's time granularity (and
2499 whether it rounds times down).
2501 if (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME))
2502 cifsInode->time = 0;
2511 cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
2514 kuid_t uid = INVALID_UID;
2515 kgid_t gid = INVALID_GID;
2516 struct inode *inode = d_inode(direntry);
2517 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2518 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
2519 struct cifsFileInfo *wfile;
2520 struct cifs_tcon *tcon;
2521 char *full_path = NULL;
2524 __u64 mode = NO_CHANGE_64;
2528 cifs_dbg(FYI, "setattr on file %pd attrs->ia_valid 0x%x\n",
2529 direntry, attrs->ia_valid);
2531 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
2532 attrs->ia_valid |= ATTR_FORCE;
2534 rc = setattr_prepare(direntry, attrs);
2540 full_path = build_path_from_dentry(direntry);
2541 if (full_path == NULL) {
2548 * Attempt to flush data before changing attributes. We need to do
2549 * this for ATTR_SIZE and ATTR_MTIME. If the flush of the data
2550 * returns error, store it to report later and continue.
2552 * BB: This should be smarter. Why bother flushing pages that
2553 * will be truncated anyway? Also, should we error out here if
2554 * the flush returns error? Do we need to check for ATTR_MTIME_SET flag?
2556 if (attrs->ia_valid & (ATTR_MTIME | ATTR_SIZE | ATTR_CTIME)) {
2557 rc = filemap_write_and_wait(inode->i_mapping);
2558 if (is_interrupt_error(rc)) {
2560 goto cifs_setattr_exit;
2562 mapping_set_error(inode->i_mapping, rc);
2567 if ((attrs->ia_valid & ATTR_MTIME) &&
2568 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) {
2569 rc = cifs_get_writable_file(cifsInode, FIND_WR_ANY, &wfile);
2571 tcon = tlink_tcon(wfile->tlink);
2572 rc = tcon->ses->server->ops->flush(xid, tcon, &wfile->fid);
2573 cifsFileInfo_put(wfile);
2575 goto cifs_setattr_exit;
2576 } else if (rc != -EBADF)
2577 goto cifs_setattr_exit;
2582 if (attrs->ia_valid & ATTR_SIZE) {
2583 rc = cifs_set_file_size(inode, attrs, xid, full_path);
2585 goto cifs_setattr_exit;
2588 if (attrs->ia_valid & ATTR_UID)
2589 uid = attrs->ia_uid;
2591 if (attrs->ia_valid & ATTR_GID)
2592 gid = attrs->ia_gid;
2594 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) ||
2595 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) {
2596 if (uid_valid(uid) || gid_valid(gid)) {
2597 rc = id_mode_to_cifs_acl(inode, full_path, NO_CHANGE_64,
2600 cifs_dbg(FYI, "%s: Setting id failed with error: %d\n",
2602 goto cifs_setattr_exit;
2606 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID))
2607 attrs->ia_valid &= ~(ATTR_UID | ATTR_GID);
2609 /* skip mode change if it's just for clearing setuid/setgid */
2610 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
2611 attrs->ia_valid &= ~ATTR_MODE;
2613 if (attrs->ia_valid & ATTR_MODE) {
2614 mode = attrs->ia_mode;
2616 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) ||
2617 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) {
2618 rc = id_mode_to_cifs_acl(inode, full_path, mode,
2619 INVALID_UID, INVALID_GID);
2621 cifs_dbg(FYI, "%s: Setting ACL failed with error: %d\n",
2623 goto cifs_setattr_exit;
2626 if (((mode & S_IWUGO) == 0) &&
2627 (cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
2629 dosattr = cifsInode->cifsAttrs | ATTR_READONLY;
2631 /* fix up mode if we're not using dynperm */
2632 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
2633 attrs->ia_mode = inode->i_mode & ~S_IWUGO;
2634 } else if ((mode & S_IWUGO) &&
2635 (cifsInode->cifsAttrs & ATTR_READONLY)) {
2637 dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
2638 /* Attributes of 0 are ignored */
2640 dosattr |= ATTR_NORMAL;
2642 /* reset local inode permissions to normal */
2643 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2644 attrs->ia_mode &= ~(S_IALLUGO);
2645 if (S_ISDIR(inode->i_mode))
2647 cifs_sb->mnt_dir_mode;
2650 cifs_sb->mnt_file_mode;
2652 } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
2653 /* ignore mode change - ATTR_READONLY hasn't changed */
2654 attrs->ia_valid &= ~ATTR_MODE;
2658 if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) ||
2659 ((attrs->ia_valid & ATTR_MODE) && dosattr)) {
2660 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
2661 /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */
2663 /* Even if error on time set, no sense failing the call if
2664 the server would set the time to a reasonable value anyway,
2665 and this check ensures that we are not being called from
2666 sys_utimes in which case we ought to fail the call back to
2667 the user when the server rejects the call */
2668 if ((rc) && (attrs->ia_valid &
2669 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
2673 /* do not need local check to inode_check_ok since the server does
2676 goto cifs_setattr_exit;
2678 if ((attrs->ia_valid & ATTR_SIZE) &&
2679 attrs->ia_size != i_size_read(inode))
2680 truncate_setsize(inode, attrs->ia_size);
2682 setattr_copy(inode, attrs);
2683 mark_inode_dirty(inode);
2692 cifs_setattr(struct dentry *direntry, struct iattr *attrs)
2694 struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
2695 struct cifs_tcon *pTcon = cifs_sb_master_tcon(cifs_sb);
2697 if (pTcon->unix_ext)
2698 return cifs_setattr_unix(direntry, attrs);
2700 return cifs_setattr_nounix(direntry, attrs);
2702 /* BB: add cifs_setattr_legacy for really old servers */
2706 void cifs_delete_inode(struct inode *inode)
2708 cifs_dbg(FYI, "In cifs_delete_inode, inode = 0x%p\n", inode);
2709 /* may have to add back in if and when safe distributed caching of
2710 directories added e.g. via FindNotify */