2 * linux/fs/9p/vfs_inode.c
4 * This file contains vfs inode ops for the 9P2000 protocol.
6 * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
7 * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2
11 * as published by the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to:
20 * Free Software Foundation
21 * 51 Franklin Street, Fifth Floor
22 * Boston, MA 02111-1301 USA
26 #include <linux/module.h>
27 #include <linux/errno.h>
29 #include <linux/file.h>
30 #include <linux/pagemap.h>
31 #include <linux/stat.h>
32 #include <linux/string.h>
33 #include <linux/inet.h>
34 #include <linux/namei.h>
35 #include <linux/idr.h>
36 #include <linux/sched.h>
37 #include <linux/slab.h>
38 #include <linux/xattr.h>
39 #include <linux/posix_acl.h>
40 #include <net/9p/9p.h>
41 #include <net/9p/client.h>
50 static const struct inode_operations v9fs_dir_inode_operations
;
51 static const struct inode_operations v9fs_dir_inode_operations_dotu
;
52 static const struct inode_operations v9fs_dir_inode_operations_dotl
;
53 static const struct inode_operations v9fs_file_inode_operations
;
54 static const struct inode_operations v9fs_file_inode_operations_dotl
;
55 static const struct inode_operations v9fs_symlink_inode_operations
;
56 static const struct inode_operations v9fs_symlink_inode_operations_dotl
;
59 v9fs_vfs_mknod_dotl(struct inode
*dir
, struct dentry
*dentry
, int omode
,
63 * unixmode2p9mode - convert unix mode bits to plan 9
64 * @v9ses: v9fs session information
65 * @mode: mode to convert
69 static int unixmode2p9mode(struct v9fs_session_info
*v9ses
, int mode
)
75 if (v9fs_proto_dotu(v9ses
)) {
78 if (v9ses
->nodev
== 0) {
82 res
|= P9_DMNAMEDPIPE
;
89 if ((mode
& S_ISUID
) == S_ISUID
)
91 if ((mode
& S_ISGID
) == S_ISGID
)
93 if ((mode
& S_ISVTX
) == S_ISVTX
)
95 if ((mode
& P9_DMLINK
))
103 * p9mode2unixmode- convert plan9 mode bits to unix mode bits
104 * @v9ses: v9fs session information
105 * @mode: mode to convert
109 static int p9mode2unixmode(struct v9fs_session_info
*v9ses
, int mode
)
115 if ((mode
& P9_DMDIR
) == P9_DMDIR
)
117 else if ((mode
& P9_DMSYMLINK
) && (v9fs_proto_dotu(v9ses
)))
119 else if ((mode
& P9_DMSOCKET
) && (v9fs_proto_dotu(v9ses
))
120 && (v9ses
->nodev
== 0))
122 else if ((mode
& P9_DMNAMEDPIPE
) && (v9fs_proto_dotu(v9ses
))
123 && (v9ses
->nodev
== 0))
125 else if ((mode
& P9_DMDEVICE
) && (v9fs_proto_dotu(v9ses
))
126 && (v9ses
->nodev
== 0))
131 if (v9fs_proto_dotu(v9ses
)) {
132 if ((mode
& P9_DMSETUID
) == P9_DMSETUID
)
135 if ((mode
& P9_DMSETGID
) == P9_DMSETGID
)
138 if ((mode
& P9_DMSETVTX
) == P9_DMSETVTX
)
146 * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits
147 * @uflags: flags to convert
148 * @extended: if .u extensions are active
151 int v9fs_uflags2omode(int uflags
, int extended
)
171 if (uflags
& O_TRUNC
)
178 if (uflags
& O_APPEND
)
186 * v9fs_blank_wstat - helper function to setup a 9P stat structure
187 * @wstat: structure to initialize
192 v9fs_blank_wstat(struct p9_wstat
*wstat
)
196 wstat
->qid
.type
= ~0;
197 wstat
->qid
.version
= ~0;
198 *((long long *)&wstat
->qid
.path
) = ~0;
210 wstat
->extension
= NULL
;
213 #ifdef CONFIG_9P_FSCACHE
215 * v9fs_alloc_inode - helper function to allocate an inode
216 * This callback is executed before setting up the inode so that we
217 * can associate a vcookie with each inode.
221 struct inode
*v9fs_alloc_inode(struct super_block
*sb
)
223 struct v9fs_cookie
*vcookie
;
224 vcookie
= (struct v9fs_cookie
*)kmem_cache_alloc(vcookie_cache
,
229 vcookie
->fscache
= NULL
;
231 spin_lock_init(&vcookie
->lock
);
232 return &vcookie
->inode
;
236 * v9fs_destroy_inode - destroy an inode
240 void v9fs_destroy_inode(struct inode
*inode
)
242 kmem_cache_free(vcookie_cache
, v9fs_inode2cookie(inode
));
247 * v9fs_get_fsgid_for_create - Helper function to get the gid for creating a
248 * new file system object. This checks the S_ISGID to determine the owning
249 * group of the new file system object.
252 static gid_t
v9fs_get_fsgid_for_create(struct inode
*dir_inode
)
254 BUG_ON(dir_inode
== NULL
);
256 if (dir_inode
->i_mode
& S_ISGID
) {
257 /* set_gid bit is set.*/
258 return dir_inode
->i_gid
;
260 return current_fsgid();
264 * v9fs_dentry_from_dir_inode - helper function to get the dentry from
269 static struct dentry
*v9fs_dentry_from_dir_inode(struct inode
*inode
)
271 struct dentry
*dentry
;
273 spin_lock(&dcache_lock
);
274 /* Directory should have only one entry. */
275 BUG_ON(S_ISDIR(inode
->i_mode
) && !list_is_singular(&inode
->i_dentry
));
276 dentry
= list_entry(inode
->i_dentry
.next
, struct dentry
, d_alias
);
277 spin_unlock(&dcache_lock
);
282 * v9fs_get_inode - helper function to setup an inode
284 * @mode: mode to setup inode with
288 struct inode
*v9fs_get_inode(struct super_block
*sb
, int mode
)
292 struct v9fs_session_info
*v9ses
= sb
->s_fs_info
;
294 P9_DPRINTK(P9_DEBUG_VFS
, "super block: %p mode: %o\n", sb
, mode
);
296 inode
= new_inode(sb
);
298 P9_EPRINTK(KERN_WARNING
, "Problem allocating inode\n");
299 return ERR_PTR(-ENOMEM
);
302 inode_init_owner(inode
, NULL
, mode
);
305 inode
->i_atime
= inode
->i_mtime
= inode
->i_ctime
= CURRENT_TIME
;
306 inode
->i_mapping
->a_ops
= &v9fs_addr_operations
;
308 switch (mode
& S_IFMT
) {
313 if (v9fs_proto_dotl(v9ses
)) {
314 inode
->i_op
= &v9fs_file_inode_operations_dotl
;
315 inode
->i_fop
= &v9fs_file_operations_dotl
;
316 } else if (v9fs_proto_dotu(v9ses
)) {
317 inode
->i_op
= &v9fs_file_inode_operations
;
318 inode
->i_fop
= &v9fs_file_operations
;
320 P9_DPRINTK(P9_DEBUG_ERROR
,
321 "special files without extended mode\n");
325 init_special_inode(inode
, inode
->i_mode
, inode
->i_rdev
);
328 if (v9fs_proto_dotl(v9ses
)) {
329 inode
->i_op
= &v9fs_file_inode_operations_dotl
;
330 inode
->i_fop
= &v9fs_file_operations_dotl
;
332 inode
->i_op
= &v9fs_file_inode_operations
;
333 inode
->i_fop
= &v9fs_file_operations
;
339 if (!v9fs_proto_dotu(v9ses
) && !v9fs_proto_dotl(v9ses
)) {
340 P9_DPRINTK(P9_DEBUG_ERROR
, "extended modes used with "
341 "legacy protocol.\n");
346 if (v9fs_proto_dotl(v9ses
))
347 inode
->i_op
= &v9fs_symlink_inode_operations_dotl
;
349 inode
->i_op
= &v9fs_symlink_inode_operations
;
354 if (v9fs_proto_dotl(v9ses
))
355 inode
->i_op
= &v9fs_dir_inode_operations_dotl
;
356 else if (v9fs_proto_dotu(v9ses
))
357 inode
->i_op
= &v9fs_dir_inode_operations_dotu
;
359 inode
->i_op
= &v9fs_dir_inode_operations
;
361 if (v9fs_proto_dotl(v9ses
))
362 inode
->i_fop
= &v9fs_dir_operations_dotl
;
364 inode
->i_fop
= &v9fs_dir_operations
;
368 P9_DPRINTK(P9_DEBUG_ERROR
, "BAD mode 0x%x S_IFMT 0x%x\n",
369 mode
, mode
& S_IFMT
);
382 static struct v9fs_fid*
383 v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry)
387 struct v9fs_fid *ret;
388 struct v9fs_fcall *fcall;
390 nfid = v9fs_get_idpool(&v9ses->fidpool);
392 eprintk(KERN_WARNING, "no free fids available\n");
393 return ERR_PTR(-ENOSPC);
396 err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name,
400 if (fcall && fcall->id == RWALK)
403 PRINT_FCALL_ERROR("walk error", fcall);
404 v9fs_put_idpool(nfid, &v9ses->fidpool);
410 ret = v9fs_fid_create(v9ses, nfid);
416 err = v9fs_fid_insert(ret, dentry);
418 v9fs_fid_destroy(ret);
425 v9fs_t_clunk(v9ses, nfid);
435 * v9fs_clear_inode - release an inode
436 * @inode: inode to release
439 void v9fs_evict_inode(struct inode
*inode
)
441 truncate_inode_pages(inode
->i_mapping
, 0);
442 end_writeback(inode
);
443 filemap_fdatawrite(inode
->i_mapping
);
445 #ifdef CONFIG_9P_FSCACHE
446 v9fs_cache_inode_put_cookie(inode
);
450 static struct inode
*
451 v9fs_inode(struct v9fs_session_info
*v9ses
, struct p9_fid
*fid
,
452 struct super_block
*sb
)
455 struct inode
*ret
= NULL
;
458 st
= p9_client_stat(fid
);
462 umode
= p9mode2unixmode(v9ses
, st
->mode
);
463 ret
= v9fs_get_inode(sb
, umode
);
469 v9fs_stat2inode(st
, ret
, sb
);
470 ret
->i_ino
= v9fs_qid2ino(&st
->qid
);
472 #ifdef CONFIG_9P_FSCACHE
473 v9fs_vcookie_set_qid(ret
, &st
->qid
);
474 v9fs_cache_inode_get_cookie(ret
);
485 static struct inode
*
486 v9fs_inode_dotl(struct v9fs_session_info
*v9ses
, struct p9_fid
*fid
,
487 struct super_block
*sb
)
489 struct inode
*ret
= NULL
;
491 struct p9_stat_dotl
*st
;
493 st
= p9_client_getattr_dotl(fid
, P9_STATS_BASIC
);
497 ret
= v9fs_get_inode(sb
, st
->st_mode
);
503 v9fs_stat2inode_dotl(st
, ret
);
504 ret
->i_ino
= v9fs_qid2ino(&st
->qid
);
505 #ifdef CONFIG_9P_FSCACHE
506 v9fs_vcookie_set_qid(ret
, &st
->qid
);
507 v9fs_cache_inode_get_cookie(ret
);
509 err
= v9fs_get_acl(ret
, fid
);
522 * v9fs_inode_from_fid - Helper routine to populate an inode by
523 * issuing a attribute request
524 * @v9ses: session information
525 * @fid: fid to issue attribute request for
526 * @sb: superblock on which to create inode
529 static inline struct inode
*
530 v9fs_inode_from_fid(struct v9fs_session_info
*v9ses
, struct p9_fid
*fid
,
531 struct super_block
*sb
)
533 if (v9fs_proto_dotl(v9ses
))
534 return v9fs_inode_dotl(v9ses
, fid
, sb
);
536 return v9fs_inode(v9ses
, fid
, sb
);
540 * v9fs_remove - helper function to remove files and directories
541 * @dir: directory inode that is being deleted
542 * @file: dentry that is being deleted
543 * @rmdir: removing a directory
547 static int v9fs_remove(struct inode
*dir
, struct dentry
*file
, int rmdir
)
550 struct inode
*file_inode
;
551 struct p9_fid
*v9fid
;
553 P9_DPRINTK(P9_DEBUG_VFS
, "inode: %p dentry: %p rmdir: %d\n", dir
, file
,
556 file_inode
= file
->d_inode
;
557 v9fid
= v9fs_fid_clone(file
);
559 return PTR_ERR(v9fid
);
561 retval
= p9_client_remove(v9fid
);
563 drop_nlink(file_inode
);
568 * v9fs_create - Create a file
569 * @v9ses: session information
570 * @dir: directory that dentry is being created in
571 * @dentry: dentry that is being created
572 * @extension: 9p2000.u extension string to support devices, etc.
573 * @perm: create permissions
577 static struct p9_fid
*
578 v9fs_create(struct v9fs_session_info
*v9ses
, struct inode
*dir
,
579 struct dentry
*dentry
, char *extension
, u32 perm
, u8 mode
)
583 struct p9_fid
*dfid
, *ofid
, *fid
;
586 P9_DPRINTK(P9_DEBUG_VFS
, "name %s\n", dentry
->d_name
.name
);
591 name
= (char *) dentry
->d_name
.name
;
592 dfid
= v9fs_fid_lookup(dentry
->d_parent
);
595 P9_DPRINTK(P9_DEBUG_VFS
, "fid lookup failed %d\n", err
);
599 /* clone a fid to use for creation */
600 ofid
= p9_client_walk(dfid
, 0, NULL
, 1);
603 P9_DPRINTK(P9_DEBUG_VFS
, "p9_client_walk failed %d\n", err
);
607 err
= p9_client_fcreate(ofid
, name
, perm
, mode
, extension
);
609 P9_DPRINTK(P9_DEBUG_VFS
, "p9_client_fcreate failed %d\n", err
);
613 /* now walk from the parent so we can get unopened fid */
614 fid
= p9_client_walk(dfid
, 1, &name
, 1);
617 P9_DPRINTK(P9_DEBUG_VFS
, "p9_client_walk failed %d\n", err
);
622 /* instantiate inode and assign the unopened fid to the dentry */
623 inode
= v9fs_inode_from_fid(v9ses
, fid
, dir
->i_sb
);
625 err
= PTR_ERR(inode
);
626 P9_DPRINTK(P9_DEBUG_VFS
, "inode creation failed %d\n", err
);
631 dentry
->d_op
= &v9fs_cached_dentry_operations
;
633 dentry
->d_op
= &v9fs_dentry_operations
;
635 d_instantiate(dentry
, inode
);
636 err
= v9fs_fid_add(dentry
, fid
);
644 p9_client_clunk(ofid
);
647 p9_client_clunk(fid
);
653 * v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol.
654 * @dir: directory inode that is being created
655 * @dentry: dentry that is being deleted
656 * @mode: create permissions
657 * @nd: path information
662 v9fs_vfs_create_dotl(struct inode
*dir
, struct dentry
*dentry
, int omode
,
663 struct nameidata
*nd
)
670 struct v9fs_session_info
*v9ses
;
671 struct p9_fid
*fid
= NULL
;
672 struct p9_fid
*dfid
, *ofid
;
676 struct posix_acl
*pacl
= NULL
, *dacl
= NULL
;
678 v9ses
= v9fs_inode2v9ses(dir
);
679 if (nd
&& nd
->flags
& LOOKUP_OPEN
)
680 flags
= nd
->intent
.open
.flags
- 1;
683 * create call without LOOKUP_OPEN is due
684 * to mknod of regular files. So use mknod
687 return v9fs_vfs_mknod_dotl(dir
, dentry
, omode
, 0);
690 name
= (char *) dentry
->d_name
.name
;
691 P9_DPRINTK(P9_DEBUG_VFS
, "v9fs_vfs_create_dotl: name:%s flags:0x%x "
692 "mode:0x%x\n", name
, flags
, omode
);
694 dfid
= v9fs_fid_lookup(dentry
->d_parent
);
697 P9_DPRINTK(P9_DEBUG_VFS
, "fid lookup failed %d\n", err
);
701 /* clone a fid to use for creation */
702 ofid
= p9_client_walk(dfid
, 0, NULL
, 1);
705 P9_DPRINTK(P9_DEBUG_VFS
, "p9_client_walk failed %d\n", err
);
709 gid
= v9fs_get_fsgid_for_create(dir
);
712 /* Update mode based on ACL value */
713 err
= v9fs_acl_mode(dir
, &mode
, &dacl
, &pacl
);
715 P9_DPRINTK(P9_DEBUG_VFS
,
716 "Failed to get acl values in creat %d\n", err
);
719 err
= p9_client_create_dotl(ofid
, name
, flags
, mode
, gid
, &qid
);
721 P9_DPRINTK(P9_DEBUG_VFS
,
722 "p9_client_open_dotl failed in creat %d\n",
726 /* instantiate inode and assign the unopened fid to the dentry */
727 if (v9ses
->cache
== CACHE_LOOSE
|| v9ses
->cache
== CACHE_FSCACHE
||
728 (nd
&& nd
->flags
& LOOKUP_OPEN
)) {
729 fid
= p9_client_walk(dfid
, 1, &name
, 1);
732 P9_DPRINTK(P9_DEBUG_VFS
, "p9_client_walk failed %d\n",
738 inode
= v9fs_inode_from_fid(v9ses
, fid
, dir
->i_sb
);
740 err
= PTR_ERR(inode
);
741 P9_DPRINTK(P9_DEBUG_VFS
, "inode creation failed %d\n",
745 dentry
->d_op
= &v9fs_cached_dentry_operations
;
746 d_instantiate(dentry
, inode
);
747 err
= v9fs_fid_add(dentry
, fid
);
750 /* The fid would get clunked via a dput */
754 * Not in cached mode. No need to populate
755 * inode with stat. We need to get an inode
756 * so that we can set the acl with dentry
758 inode
= v9fs_get_inode(dir
->i_sb
, mode
);
760 err
= PTR_ERR(inode
);
763 dentry
->d_op
= &v9fs_dentry_operations
;
764 d_instantiate(dentry
, inode
);
766 /* Now set the ACL based on the default value */
767 v9fs_set_create_acl(dentry
, dacl
, pacl
);
769 /* if we are opening a file, assign the open fid to the file */
770 if (nd
&& nd
->flags
& LOOKUP_OPEN
) {
771 filp
= lookup_instantiate_filp(nd
, dentry
, generic_file_open
);
773 p9_client_clunk(ofid
);
774 return PTR_ERR(filp
);
776 filp
->private_data
= ofid
;
778 p9_client_clunk(ofid
);
784 p9_client_clunk(ofid
);
786 p9_client_clunk(fid
);
791 * v9fs_vfs_create - VFS hook to create files
792 * @dir: directory inode that is being created
793 * @dentry: dentry that is being deleted
794 * @mode: create permissions
795 * @nd: path information
800 v9fs_vfs_create(struct inode
*dir
, struct dentry
*dentry
, int mode
,
801 struct nameidata
*nd
)
806 struct v9fs_session_info
*v9ses
;
812 v9ses
= v9fs_inode2v9ses(dir
);
813 perm
= unixmode2p9mode(v9ses
, mode
);
814 if (nd
&& nd
->flags
& LOOKUP_OPEN
)
815 flags
= nd
->intent
.open
.flags
- 1;
819 fid
= v9fs_create(v9ses
, dir
, dentry
, NULL
, perm
,
820 v9fs_uflags2omode(flags
,
821 v9fs_proto_dotu(v9ses
)));
828 /* if we are opening a file, assign the open fid to the file */
829 if (nd
&& nd
->flags
& LOOKUP_OPEN
) {
830 filp
= lookup_instantiate_filp(nd
, dentry
, generic_file_open
);
836 filp
->private_data
= fid
;
838 p9_client_clunk(fid
);
844 p9_client_clunk(fid
);
850 * v9fs_vfs_mkdir - VFS mkdir hook to create a directory
851 * @dir: inode that is being unlinked
852 * @dentry: dentry that is being unlinked
853 * @mode: mode for new directory
857 static int v9fs_vfs_mkdir(struct inode
*dir
, struct dentry
*dentry
, int mode
)
861 struct v9fs_session_info
*v9ses
;
864 P9_DPRINTK(P9_DEBUG_VFS
, "name %s\n", dentry
->d_name
.name
);
866 v9ses
= v9fs_inode2v9ses(dir
);
867 perm
= unixmode2p9mode(v9ses
, mode
| S_IFDIR
);
868 fid
= v9fs_create(v9ses
, dir
, dentry
, NULL
, perm
, P9_OREAD
);
875 p9_client_clunk(fid
);
882 * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory
883 * @dir: inode that is being unlinked
884 * @dentry: dentry that is being unlinked
885 * @mode: mode for new directory
889 static int v9fs_vfs_mkdir_dotl(struct inode
*dir
,
890 struct dentry
*dentry
, int omode
)
893 struct v9fs_session_info
*v9ses
;
894 struct p9_fid
*fid
= NULL
, *dfid
= NULL
;
900 struct dentry
*dir_dentry
;
901 struct posix_acl
*dacl
= NULL
, *pacl
= NULL
;
903 P9_DPRINTK(P9_DEBUG_VFS
, "name %s\n", dentry
->d_name
.name
);
905 v9ses
= v9fs_inode2v9ses(dir
);
908 if (dir
->i_mode
& S_ISGID
)
911 dir_dentry
= v9fs_dentry_from_dir_inode(dir
);
912 dfid
= v9fs_fid_lookup(dir_dentry
);
915 P9_DPRINTK(P9_DEBUG_VFS
, "fid lookup failed %d\n", err
);
920 gid
= v9fs_get_fsgid_for_create(dir
);
922 /* Update mode based on ACL value */
923 err
= v9fs_acl_mode(dir
, &mode
, &dacl
, &pacl
);
925 P9_DPRINTK(P9_DEBUG_VFS
,
926 "Failed to get acl values in mkdir %d\n", err
);
929 name
= (char *) dentry
->d_name
.name
;
930 err
= p9_client_mkdir_dotl(dfid
, name
, mode
, gid
, &qid
);
934 /* instantiate inode and assign the unopened fid to the dentry */
935 if (v9ses
->cache
== CACHE_LOOSE
|| v9ses
->cache
== CACHE_FSCACHE
) {
936 fid
= p9_client_walk(dfid
, 1, &name
, 1);
939 P9_DPRINTK(P9_DEBUG_VFS
, "p9_client_walk failed %d\n",
945 inode
= v9fs_inode_from_fid(v9ses
, fid
, dir
->i_sb
);
947 err
= PTR_ERR(inode
);
948 P9_DPRINTK(P9_DEBUG_VFS
, "inode creation failed %d\n",
952 dentry
->d_op
= &v9fs_cached_dentry_operations
;
953 d_instantiate(dentry
, inode
);
954 err
= v9fs_fid_add(dentry
, fid
);
960 * Not in cached mode. No need to populate
961 * inode with stat. We need to get an inode
962 * so that we can set the acl with dentry
964 inode
= v9fs_get_inode(dir
->i_sb
, mode
);
966 err
= PTR_ERR(inode
);
969 dentry
->d_op
= &v9fs_dentry_operations
;
970 d_instantiate(dentry
, inode
);
972 /* Now set the ACL based on the default value */
973 v9fs_set_create_acl(dentry
, dacl
, pacl
);
977 p9_client_clunk(fid
);
982 * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode
983 * @dir: inode that is being walked from
984 * @dentry: dentry that is being walked to?
985 * @nameidata: path data
989 static struct dentry
*v9fs_vfs_lookup(struct inode
*dir
, struct dentry
*dentry
,
990 struct nameidata
*nameidata
)
992 struct super_block
*sb
;
993 struct v9fs_session_info
*v9ses
;
994 struct p9_fid
*dfid
, *fid
;
999 P9_DPRINTK(P9_DEBUG_VFS
, "dir: %p dentry: (%s) %p nameidata: %p\n",
1000 dir
, dentry
->d_name
.name
, dentry
, nameidata
);
1002 if (dentry
->d_name
.len
> NAME_MAX
)
1003 return ERR_PTR(-ENAMETOOLONG
);
1006 v9ses
= v9fs_inode2v9ses(dir
);
1007 /* We can walk d_parent because we hold the dir->i_mutex */
1008 dfid
= v9fs_fid_lookup(dentry
->d_parent
);
1010 return ERR_CAST(dfid
);
1012 name
= (char *) dentry
->d_name
.name
;
1013 fid
= p9_client_walk(dfid
, 1, &name
, 1);
1015 result
= PTR_ERR(fid
);
1016 if (result
== -ENOENT
) {
1021 return ERR_PTR(result
);
1024 inode
= v9fs_inode_from_fid(v9ses
, fid
, dir
->i_sb
);
1025 if (IS_ERR(inode
)) {
1026 result
= PTR_ERR(inode
);
1031 result
= v9fs_fid_add(dentry
, fid
);
1037 dentry
->d_op
= &v9fs_cached_dentry_operations
;
1039 dentry
->d_op
= &v9fs_dentry_operations
;
1041 d_add(dentry
, inode
);
1047 p9_client_clunk(fid
);
1049 return ERR_PTR(result
);
1053 * v9fs_vfs_unlink - VFS unlink hook to delete an inode
1054 * @i: inode that is being unlinked
1055 * @d: dentry that is being unlinked
1059 static int v9fs_vfs_unlink(struct inode
*i
, struct dentry
*d
)
1061 return v9fs_remove(i
, d
, 0);
1065 * v9fs_vfs_rmdir - VFS unlink hook to delete a directory
1066 * @i: inode that is being unlinked
1067 * @d: dentry that is being unlinked
1071 static int v9fs_vfs_rmdir(struct inode
*i
, struct dentry
*d
)
1073 return v9fs_remove(i
, d
, 1);
1077 * v9fs_vfs_rename - VFS hook to rename an inode
1078 * @old_dir: old dir inode
1079 * @old_dentry: old dentry
1080 * @new_dir: new dir inode
1081 * @new_dentry: new dentry
1086 v9fs_vfs_rename(struct inode
*old_dir
, struct dentry
*old_dentry
,
1087 struct inode
*new_dir
, struct dentry
*new_dentry
)
1089 struct inode
*old_inode
;
1090 struct v9fs_session_info
*v9ses
;
1091 struct p9_fid
*oldfid
;
1092 struct p9_fid
*olddirfid
;
1093 struct p9_fid
*newdirfid
;
1094 struct p9_wstat wstat
;
1097 P9_DPRINTK(P9_DEBUG_VFS
, "\n");
1099 old_inode
= old_dentry
->d_inode
;
1100 v9ses
= v9fs_inode2v9ses(old_inode
);
1101 oldfid
= v9fs_fid_lookup(old_dentry
);
1103 return PTR_ERR(oldfid
);
1105 olddirfid
= v9fs_fid_clone(old_dentry
->d_parent
);
1106 if (IS_ERR(olddirfid
)) {
1107 retval
= PTR_ERR(olddirfid
);
1111 newdirfid
= v9fs_fid_clone(new_dentry
->d_parent
);
1112 if (IS_ERR(newdirfid
)) {
1113 retval
= PTR_ERR(newdirfid
);
1117 down_write(&v9ses
->rename_sem
);
1118 if (v9fs_proto_dotl(v9ses
)) {
1119 retval
= p9_client_rename(oldfid
, newdirfid
,
1120 (char *) new_dentry
->d_name
.name
);
1121 if (retval
!= -ENOSYS
)
1124 if (old_dentry
->d_parent
!= new_dentry
->d_parent
) {
1126 * 9P .u can only handle file rename in the same directory
1129 P9_DPRINTK(P9_DEBUG_ERROR
,
1130 "old dir and new dir are different\n");
1134 v9fs_blank_wstat(&wstat
);
1135 wstat
.muid
= v9ses
->uname
;
1136 wstat
.name
= (char *) new_dentry
->d_name
.name
;
1137 retval
= p9_client_wstat(oldfid
, &wstat
);
1141 /* successful rename */
1142 d_move(old_dentry
, new_dentry
);
1143 up_write(&v9ses
->rename_sem
);
1144 p9_client_clunk(newdirfid
);
1147 p9_client_clunk(olddirfid
);
1154 * v9fs_vfs_getattr - retrieve file metadata
1155 * @mnt: mount information
1156 * @dentry: file to get attributes on
1157 * @stat: metadata structure to populate
1162 v9fs_vfs_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
,
1166 struct v9fs_session_info
*v9ses
;
1168 struct p9_wstat
*st
;
1170 P9_DPRINTK(P9_DEBUG_VFS
, "dentry: %p\n", dentry
);
1172 v9ses
= v9fs_inode2v9ses(dentry
->d_inode
);
1173 if (v9ses
->cache
== CACHE_LOOSE
|| v9ses
->cache
== CACHE_FSCACHE
)
1174 return simple_getattr(mnt
, dentry
, stat
);
1176 fid
= v9fs_fid_lookup(dentry
);
1178 return PTR_ERR(fid
);
1180 st
= p9_client_stat(fid
);
1184 v9fs_stat2inode(st
, dentry
->d_inode
, dentry
->d_inode
->i_sb
);
1185 generic_fillattr(dentry
->d_inode
, stat
);
1193 v9fs_vfs_getattr_dotl(struct vfsmount
*mnt
, struct dentry
*dentry
,
1197 struct v9fs_session_info
*v9ses
;
1199 struct p9_stat_dotl
*st
;
1201 P9_DPRINTK(P9_DEBUG_VFS
, "dentry: %p\n", dentry
);
1203 v9ses
= v9fs_inode2v9ses(dentry
->d_inode
);
1204 if (v9ses
->cache
== CACHE_LOOSE
|| v9ses
->cache
== CACHE_FSCACHE
)
1205 return simple_getattr(mnt
, dentry
, stat
);
1207 fid
= v9fs_fid_lookup(dentry
);
1209 return PTR_ERR(fid
);
1211 /* Ask for all the fields in stat structure. Server will return
1212 * whatever it supports
1215 st
= p9_client_getattr_dotl(fid
, P9_STATS_ALL
);
1219 v9fs_stat2inode_dotl(st
, dentry
->d_inode
);
1220 generic_fillattr(dentry
->d_inode
, stat
);
1221 /* Change block size to what the server returned */
1222 stat
->blksize
= st
->st_blksize
;
1229 * v9fs_vfs_setattr - set file metadata
1230 * @dentry: file whose metadata to set
1231 * @iattr: metadata assignment structure
1235 static int v9fs_vfs_setattr(struct dentry
*dentry
, struct iattr
*iattr
)
1238 struct v9fs_session_info
*v9ses
;
1240 struct p9_wstat wstat
;
1242 P9_DPRINTK(P9_DEBUG_VFS
, "\n");
1244 v9ses
= v9fs_inode2v9ses(dentry
->d_inode
);
1245 fid
= v9fs_fid_lookup(dentry
);
1247 return PTR_ERR(fid
);
1249 v9fs_blank_wstat(&wstat
);
1250 if (iattr
->ia_valid
& ATTR_MODE
)
1251 wstat
.mode
= unixmode2p9mode(v9ses
, iattr
->ia_mode
);
1253 if (iattr
->ia_valid
& ATTR_MTIME
)
1254 wstat
.mtime
= iattr
->ia_mtime
.tv_sec
;
1256 if (iattr
->ia_valid
& ATTR_ATIME
)
1257 wstat
.atime
= iattr
->ia_atime
.tv_sec
;
1259 if (iattr
->ia_valid
& ATTR_SIZE
)
1260 wstat
.length
= iattr
->ia_size
;
1262 if (v9fs_proto_dotu(v9ses
)) {
1263 if (iattr
->ia_valid
& ATTR_UID
)
1264 wstat
.n_uid
= iattr
->ia_uid
;
1266 if (iattr
->ia_valid
& ATTR_GID
)
1267 wstat
.n_gid
= iattr
->ia_gid
;
1270 retval
= p9_client_wstat(fid
, &wstat
);
1274 if ((iattr
->ia_valid
& ATTR_SIZE
) &&
1275 iattr
->ia_size
!= i_size_read(dentry
->d_inode
)) {
1276 retval
= vmtruncate(dentry
->d_inode
, iattr
->ia_size
);
1281 setattr_copy(dentry
->d_inode
, iattr
);
1282 mark_inode_dirty(dentry
->d_inode
);
1287 * v9fs_vfs_setattr_dotl - set file metadata
1288 * @dentry: file whose metadata to set
1289 * @iattr: metadata assignment structure
1293 int v9fs_vfs_setattr_dotl(struct dentry
*dentry
, struct iattr
*iattr
)
1296 struct v9fs_session_info
*v9ses
;
1298 struct p9_iattr_dotl p9attr
;
1300 P9_DPRINTK(P9_DEBUG_VFS
, "\n");
1302 retval
= inode_change_ok(dentry
->d_inode
, iattr
);
1306 p9attr
.valid
= iattr
->ia_valid
;
1307 p9attr
.mode
= iattr
->ia_mode
;
1308 p9attr
.uid
= iattr
->ia_uid
;
1309 p9attr
.gid
= iattr
->ia_gid
;
1310 p9attr
.size
= iattr
->ia_size
;
1311 p9attr
.atime_sec
= iattr
->ia_atime
.tv_sec
;
1312 p9attr
.atime_nsec
= iattr
->ia_atime
.tv_nsec
;
1313 p9attr
.mtime_sec
= iattr
->ia_mtime
.tv_sec
;
1314 p9attr
.mtime_nsec
= iattr
->ia_mtime
.tv_nsec
;
1317 v9ses
= v9fs_inode2v9ses(dentry
->d_inode
);
1318 fid
= v9fs_fid_lookup(dentry
);
1320 return PTR_ERR(fid
);
1322 retval
= p9_client_setattr(fid
, &p9attr
);
1326 if ((iattr
->ia_valid
& ATTR_SIZE
) &&
1327 iattr
->ia_size
!= i_size_read(dentry
->d_inode
)) {
1328 retval
= vmtruncate(dentry
->d_inode
, iattr
->ia_size
);
1333 setattr_copy(dentry
->d_inode
, iattr
);
1334 mark_inode_dirty(dentry
->d_inode
);
1335 if (iattr
->ia_valid
& ATTR_MODE
) {
1336 /* We also want to update ACL when we update mode bits */
1337 retval
= v9fs_acl_chmod(dentry
);
1345 * v9fs_stat2inode - populate an inode structure with mistat info
1346 * @stat: Plan 9 metadata (mistat) structure
1347 * @inode: inode to populate
1348 * @sb: superblock of filesystem
1353 v9fs_stat2inode(struct p9_wstat
*stat
, struct inode
*inode
,
1354 struct super_block
*sb
)
1358 unsigned int i_nlink
;
1359 struct v9fs_session_info
*v9ses
= sb
->s_fs_info
;
1363 inode
->i_atime
.tv_sec
= stat
->atime
;
1364 inode
->i_mtime
.tv_sec
= stat
->mtime
;
1365 inode
->i_ctime
.tv_sec
= stat
->mtime
;
1367 inode
->i_uid
= v9ses
->dfltuid
;
1368 inode
->i_gid
= v9ses
->dfltgid
;
1370 if (v9fs_proto_dotu(v9ses
)) {
1371 inode
->i_uid
= stat
->n_uid
;
1372 inode
->i_gid
= stat
->n_gid
;
1374 if ((S_ISREG(inode
->i_mode
)) || (S_ISDIR(inode
->i_mode
))) {
1375 if (v9fs_proto_dotu(v9ses
) && (stat
->extension
[0] != '\0')) {
1377 * Hadlink support got added later to
1378 * to the .u extension. So there can be
1379 * server out there that doesn't support
1380 * this even with .u extension. So check
1381 * for non NULL stat->extension
1383 strncpy(ext
, stat
->extension
, sizeof(ext
));
1384 /* HARDLINKCOUNT %u */
1385 sscanf(ext
, "%13s %u", tag_name
, &i_nlink
);
1386 if (!strncmp(tag_name
, "HARDLINKCOUNT", 13))
1387 inode
->i_nlink
= i_nlink
;
1390 inode
->i_mode
= p9mode2unixmode(v9ses
, stat
->mode
);
1391 if ((S_ISBLK(inode
->i_mode
)) || (S_ISCHR(inode
->i_mode
))) {
1396 strncpy(ext
, stat
->extension
, sizeof(ext
));
1397 sscanf(ext
, "%c %u %u", &type
, &major
, &minor
);
1400 inode
->i_mode
&= ~S_IFBLK
;
1401 inode
->i_mode
|= S_IFCHR
;
1406 P9_DPRINTK(P9_DEBUG_ERROR
,
1407 "Unknown special type %c %s\n", type
,
1410 inode
->i_rdev
= MKDEV(major
, minor
);
1411 init_special_inode(inode
, inode
->i_mode
, inode
->i_rdev
);
1415 i_size_write(inode
, stat
->length
);
1417 /* not real number of blocks, but 512 byte ones ... */
1418 inode
->i_blocks
= (i_size_read(inode
) + 512 - 1) >> 9;
1422 * v9fs_stat2inode_dotl - populate an inode structure with stat info
1423 * @stat: stat structure
1424 * @inode: inode to populate
1425 * @sb: superblock of filesystem
1430 v9fs_stat2inode_dotl(struct p9_stat_dotl
*stat
, struct inode
*inode
)
1433 if ((stat
->st_result_mask
& P9_STATS_BASIC
) == P9_STATS_BASIC
) {
1434 inode
->i_atime
.tv_sec
= stat
->st_atime_sec
;
1435 inode
->i_atime
.tv_nsec
= stat
->st_atime_nsec
;
1436 inode
->i_mtime
.tv_sec
= stat
->st_mtime_sec
;
1437 inode
->i_mtime
.tv_nsec
= stat
->st_mtime_nsec
;
1438 inode
->i_ctime
.tv_sec
= stat
->st_ctime_sec
;
1439 inode
->i_ctime
.tv_nsec
= stat
->st_ctime_nsec
;
1440 inode
->i_uid
= stat
->st_uid
;
1441 inode
->i_gid
= stat
->st_gid
;
1442 inode
->i_nlink
= stat
->st_nlink
;
1443 inode
->i_mode
= stat
->st_mode
;
1444 inode
->i_rdev
= new_decode_dev(stat
->st_rdev
);
1446 if ((S_ISBLK(inode
->i_mode
)) || (S_ISCHR(inode
->i_mode
)))
1447 init_special_inode(inode
, inode
->i_mode
, inode
->i_rdev
);
1449 i_size_write(inode
, stat
->st_size
);
1450 inode
->i_blocks
= stat
->st_blocks
;
1452 if (stat
->st_result_mask
& P9_STATS_ATIME
) {
1453 inode
->i_atime
.tv_sec
= stat
->st_atime_sec
;
1454 inode
->i_atime
.tv_nsec
= stat
->st_atime_nsec
;
1456 if (stat
->st_result_mask
& P9_STATS_MTIME
) {
1457 inode
->i_mtime
.tv_sec
= stat
->st_mtime_sec
;
1458 inode
->i_mtime
.tv_nsec
= stat
->st_mtime_nsec
;
1460 if (stat
->st_result_mask
& P9_STATS_CTIME
) {
1461 inode
->i_ctime
.tv_sec
= stat
->st_ctime_sec
;
1462 inode
->i_ctime
.tv_nsec
= stat
->st_ctime_nsec
;
1464 if (stat
->st_result_mask
& P9_STATS_UID
)
1465 inode
->i_uid
= stat
->st_uid
;
1466 if (stat
->st_result_mask
& P9_STATS_GID
)
1467 inode
->i_gid
= stat
->st_gid
;
1468 if (stat
->st_result_mask
& P9_STATS_NLINK
)
1469 inode
->i_nlink
= stat
->st_nlink
;
1470 if (stat
->st_result_mask
& P9_STATS_MODE
) {
1471 inode
->i_mode
= stat
->st_mode
;
1472 if ((S_ISBLK(inode
->i_mode
)) ||
1473 (S_ISCHR(inode
->i_mode
)))
1474 init_special_inode(inode
, inode
->i_mode
,
1477 if (stat
->st_result_mask
& P9_STATS_RDEV
)
1478 inode
->i_rdev
= new_decode_dev(stat
->st_rdev
);
1479 if (stat
->st_result_mask
& P9_STATS_SIZE
)
1480 i_size_write(inode
, stat
->st_size
);
1481 if (stat
->st_result_mask
& P9_STATS_BLOCKS
)
1482 inode
->i_blocks
= stat
->st_blocks
;
1484 if (stat
->st_result_mask
& P9_STATS_GEN
)
1485 inode
->i_generation
= stat
->st_gen
;
1487 /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION
1488 * because the inode structure does not have fields for them.
1493 * v9fs_qid2ino - convert qid into inode number
1496 * BUG: potential for inode number collisions?
1499 ino_t
v9fs_qid2ino(struct p9_qid
*qid
)
1501 u64 path
= qid
->path
+ 2;
1504 if (sizeof(ino_t
) == sizeof(path
))
1505 memcpy(&i
, &path
, sizeof(ino_t
));
1507 i
= (ino_t
) (path
^ (path
>> 32));
1513 * v9fs_readlink - read a symlink's location (internal version)
1514 * @dentry: dentry for symlink
1515 * @buffer: buffer to load symlink location into
1516 * @buflen: length of buffer
1520 static int v9fs_readlink(struct dentry
*dentry
, char *buffer
, int buflen
)
1524 struct v9fs_session_info
*v9ses
;
1526 struct p9_wstat
*st
;
1528 P9_DPRINTK(P9_DEBUG_VFS
, " %s\n", dentry
->d_name
.name
);
1530 v9ses
= v9fs_inode2v9ses(dentry
->d_inode
);
1531 fid
= v9fs_fid_lookup(dentry
);
1533 return PTR_ERR(fid
);
1535 if (!v9fs_proto_dotu(v9ses
))
1538 st
= p9_client_stat(fid
);
1542 if (!(st
->mode
& P9_DMSYMLINK
)) {
1547 /* copy extension buffer into buffer */
1548 strncpy(buffer
, st
->extension
, buflen
);
1550 P9_DPRINTK(P9_DEBUG_VFS
,
1551 "%s -> %s (%s)\n", dentry
->d_name
.name
, st
->extension
, buffer
);
1553 retval
= strnlen(buffer
, buflen
);
1561 * v9fs_vfs_follow_link - follow a symlink path
1562 * @dentry: dentry for symlink
1567 static void *v9fs_vfs_follow_link(struct dentry
*dentry
, struct nameidata
*nd
)
1570 char *link
= __getname();
1572 P9_DPRINTK(P9_DEBUG_VFS
, "%s n", dentry
->d_name
.name
);
1575 link
= ERR_PTR(-ENOMEM
);
1577 len
= v9fs_readlink(dentry
, link
, PATH_MAX
);
1581 link
= ERR_PTR(len
);
1583 link
[min(len
, PATH_MAX
-1)] = 0;
1585 nd_set_link(nd
, link
);
1591 * v9fs_vfs_put_link - release a symlink path
1592 * @dentry: dentry for symlink
1599 v9fs_vfs_put_link(struct dentry
*dentry
, struct nameidata
*nd
, void *p
)
1601 char *s
= nd_get_link(nd
);
1603 P9_DPRINTK(P9_DEBUG_VFS
, " %s %s\n", dentry
->d_name
.name
,
1604 IS_ERR(s
) ? "<error>" : s
);
1610 * v9fs_vfs_mkspecial - create a special file
1611 * @dir: inode to create special file in
1612 * @dentry: dentry to create
1613 * @mode: mode to create special file
1614 * @extension: 9p2000.u format extension string representing special file
1618 static int v9fs_vfs_mkspecial(struct inode
*dir
, struct dentry
*dentry
,
1619 int mode
, const char *extension
)
1622 struct v9fs_session_info
*v9ses
;
1625 v9ses
= v9fs_inode2v9ses(dir
);
1626 if (!v9fs_proto_dotu(v9ses
)) {
1627 P9_DPRINTK(P9_DEBUG_ERROR
, "not extended\n");
1631 perm
= unixmode2p9mode(v9ses
, mode
);
1632 fid
= v9fs_create(v9ses
, dir
, dentry
, (char *) extension
, perm
,
1635 return PTR_ERR(fid
);
1637 p9_client_clunk(fid
);
1642 * v9fs_vfs_symlink_dotl - helper function to create symlinks
1643 * @dir: directory inode containing symlink
1644 * @dentry: dentry for symlink
1645 * @symname: symlink data
1647 * See Also: 9P2000.L RFC for more information
1652 v9fs_vfs_symlink_dotl(struct inode
*dir
, struct dentry
*dentry
,
1653 const char *symname
)
1655 struct v9fs_session_info
*v9ses
;
1656 struct p9_fid
*dfid
;
1657 struct p9_fid
*fid
= NULL
;
1658 struct inode
*inode
;
1664 name
= (char *) dentry
->d_name
.name
;
1665 P9_DPRINTK(P9_DEBUG_VFS
, "v9fs_vfs_symlink_dotl : %lu,%s,%s\n",
1666 dir
->i_ino
, name
, symname
);
1667 v9ses
= v9fs_inode2v9ses(dir
);
1669 dfid
= v9fs_fid_lookup(dentry
->d_parent
);
1671 err
= PTR_ERR(dfid
);
1672 P9_DPRINTK(P9_DEBUG_VFS
, "fid lookup failed %d\n", err
);
1676 gid
= v9fs_get_fsgid_for_create(dir
);
1678 /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */
1679 err
= p9_client_symlink(dfid
, name
, (char *)symname
, gid
, &qid
);
1682 P9_DPRINTK(P9_DEBUG_VFS
, "p9_client_symlink failed %d\n", err
);
1687 /* Now walk from the parent so we can get an unopened fid. */
1688 fid
= p9_client_walk(dfid
, 1, &name
, 1);
1691 P9_DPRINTK(P9_DEBUG_VFS
, "p9_client_walk failed %d\n",
1697 /* instantiate inode and assign the unopened fid to dentry */
1698 inode
= v9fs_inode_from_fid(v9ses
, fid
, dir
->i_sb
);
1699 if (IS_ERR(inode
)) {
1700 err
= PTR_ERR(inode
);
1701 P9_DPRINTK(P9_DEBUG_VFS
, "inode creation failed %d\n",
1705 dentry
->d_op
= &v9fs_cached_dentry_operations
;
1706 d_instantiate(dentry
, inode
);
1707 err
= v9fs_fid_add(dentry
, fid
);
1712 /* Not in cached mode. No need to populate inode with stat */
1713 inode
= v9fs_get_inode(dir
->i_sb
, S_IFLNK
);
1714 if (IS_ERR(inode
)) {
1715 err
= PTR_ERR(inode
);
1718 dentry
->d_op
= &v9fs_dentry_operations
;
1719 d_instantiate(dentry
, inode
);
1724 p9_client_clunk(fid
);
1730 * v9fs_vfs_symlink - helper function to create symlinks
1731 * @dir: directory inode containing symlink
1732 * @dentry: dentry for symlink
1733 * @symname: symlink data
1735 * See Also: 9P2000.u RFC for more information
1740 v9fs_vfs_symlink(struct inode
*dir
, struct dentry
*dentry
, const char *symname
)
1742 P9_DPRINTK(P9_DEBUG_VFS
, " %lu,%s,%s\n", dir
->i_ino
,
1743 dentry
->d_name
.name
, symname
);
1745 return v9fs_vfs_mkspecial(dir
, dentry
, S_IFLNK
, symname
);
1749 * v9fs_vfs_link - create a hardlink
1750 * @old_dentry: dentry for file to link to
1751 * @dir: inode destination for new link
1752 * @dentry: dentry for link
1757 v9fs_vfs_link(struct dentry
*old_dentry
, struct inode
*dir
,
1758 struct dentry
*dentry
)
1761 struct p9_fid
*oldfid
;
1764 P9_DPRINTK(P9_DEBUG_VFS
,
1765 " %lu,%s,%s\n", dir
->i_ino
, dentry
->d_name
.name
,
1766 old_dentry
->d_name
.name
);
1768 oldfid
= v9fs_fid_clone(old_dentry
);
1770 return PTR_ERR(oldfid
);
1773 if (unlikely(!name
)) {
1778 sprintf(name
, "%d\n", oldfid
->fid
);
1779 retval
= v9fs_vfs_mkspecial(dir
, dentry
, P9_DMLINK
, name
);
1783 p9_client_clunk(oldfid
);
1788 * v9fs_vfs_link_dotl - create a hardlink for dotl
1789 * @old_dentry: dentry for file to link to
1790 * @dir: inode destination for new link
1791 * @dentry: dentry for link
1796 v9fs_vfs_link_dotl(struct dentry
*old_dentry
, struct inode
*dir
,
1797 struct dentry
*dentry
)
1800 struct p9_fid
*dfid
, *oldfid
;
1802 struct v9fs_session_info
*v9ses
;
1803 struct dentry
*dir_dentry
;
1805 P9_DPRINTK(P9_DEBUG_VFS
, "dir ino: %lu, old_name: %s, new_name: %s\n",
1806 dir
->i_ino
, old_dentry
->d_name
.name
,
1807 dentry
->d_name
.name
);
1809 v9ses
= v9fs_inode2v9ses(dir
);
1810 dir_dentry
= v9fs_dentry_from_dir_inode(dir
);
1811 dfid
= v9fs_fid_lookup(dir_dentry
);
1813 return PTR_ERR(dfid
);
1815 oldfid
= v9fs_fid_lookup(old_dentry
);
1817 return PTR_ERR(oldfid
);
1819 name
= (char *) dentry
->d_name
.name
;
1821 err
= p9_client_link(dfid
, oldfid
, (char *)dentry
->d_name
.name
);
1824 P9_DPRINTK(P9_DEBUG_VFS
, "p9_client_link failed %d\n", err
);
1828 if (v9ses
->cache
== CACHE_LOOSE
|| v9ses
->cache
== CACHE_FSCACHE
) {
1829 /* Get the latest stat info from server. */
1831 struct p9_stat_dotl
*st
;
1833 fid
= v9fs_fid_lookup(old_dentry
);
1835 return PTR_ERR(fid
);
1837 st
= p9_client_getattr_dotl(fid
, P9_STATS_BASIC
);
1841 v9fs_stat2inode_dotl(st
, old_dentry
->d_inode
);
1845 /* Caching disabled. No need to get upto date stat info.
1846 * This dentry will be released immediately. So, just hold the
1849 ihold(old_dentry
->d_inode
);
1852 dentry
->d_op
= old_dentry
->d_op
;
1853 d_instantiate(dentry
, old_dentry
->d_inode
);
1859 * v9fs_vfs_mknod - create a special file
1860 * @dir: inode destination for new link
1861 * @dentry: dentry for file
1862 * @mode: mode for creation
1863 * @rdev: device associated with special file
1868 v9fs_vfs_mknod(struct inode
*dir
, struct dentry
*dentry
, int mode
, dev_t rdev
)
1873 P9_DPRINTK(P9_DEBUG_VFS
,
1874 " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir
->i_ino
,
1875 dentry
->d_name
.name
, mode
, MAJOR(rdev
), MINOR(rdev
));
1877 if (!new_valid_dev(rdev
))
1883 /* build extension */
1885 sprintf(name
, "b %u %u", MAJOR(rdev
), MINOR(rdev
));
1886 else if (S_ISCHR(mode
))
1887 sprintf(name
, "c %u %u", MAJOR(rdev
), MINOR(rdev
));
1888 else if (S_ISFIFO(mode
))
1890 else if (S_ISSOCK(mode
))
1897 retval
= v9fs_vfs_mkspecial(dir
, dentry
, mode
, name
);
1904 * v9fs_vfs_mknod_dotl - create a special file
1905 * @dir: inode destination for new link
1906 * @dentry: dentry for file
1907 * @mode: mode for creation
1908 * @rdev: device associated with special file
1912 v9fs_vfs_mknod_dotl(struct inode
*dir
, struct dentry
*dentry
, int omode
,
1918 struct v9fs_session_info
*v9ses
;
1919 struct p9_fid
*fid
= NULL
, *dfid
= NULL
;
1920 struct inode
*inode
;
1923 struct dentry
*dir_dentry
;
1924 struct posix_acl
*dacl
= NULL
, *pacl
= NULL
;
1926 P9_DPRINTK(P9_DEBUG_VFS
,
1927 " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir
->i_ino
,
1928 dentry
->d_name
.name
, omode
, MAJOR(rdev
), MINOR(rdev
));
1930 if (!new_valid_dev(rdev
))
1933 v9ses
= v9fs_inode2v9ses(dir
);
1934 dir_dentry
= v9fs_dentry_from_dir_inode(dir
);
1935 dfid
= v9fs_fid_lookup(dir_dentry
);
1937 err
= PTR_ERR(dfid
);
1938 P9_DPRINTK(P9_DEBUG_VFS
, "fid lookup failed %d\n", err
);
1943 gid
= v9fs_get_fsgid_for_create(dir
);
1945 /* Update mode based on ACL value */
1946 err
= v9fs_acl_mode(dir
, &mode
, &dacl
, &pacl
);
1948 P9_DPRINTK(P9_DEBUG_VFS
,
1949 "Failed to get acl values in mknod %d\n", err
);
1952 name
= (char *) dentry
->d_name
.name
;
1954 err
= p9_client_mknod_dotl(dfid
, name
, mode
, rdev
, gid
, &qid
);
1958 /* instantiate inode and assign the unopened fid to the dentry */
1959 if (v9ses
->cache
== CACHE_LOOSE
|| v9ses
->cache
== CACHE_FSCACHE
) {
1960 fid
= p9_client_walk(dfid
, 1, &name
, 1);
1963 P9_DPRINTK(P9_DEBUG_VFS
, "p9_client_walk failed %d\n",
1969 inode
= v9fs_inode_from_fid(v9ses
, fid
, dir
->i_sb
);
1970 if (IS_ERR(inode
)) {
1971 err
= PTR_ERR(inode
);
1972 P9_DPRINTK(P9_DEBUG_VFS
, "inode creation failed %d\n",
1976 dentry
->d_op
= &v9fs_cached_dentry_operations
;
1977 d_instantiate(dentry
, inode
);
1978 err
= v9fs_fid_add(dentry
, fid
);
1984 * Not in cached mode. No need to populate inode with stat.
1985 * socket syscall returns a fd, so we need instantiate
1987 inode
= v9fs_get_inode(dir
->i_sb
, mode
);
1988 if (IS_ERR(inode
)) {
1989 err
= PTR_ERR(inode
);
1992 dentry
->d_op
= &v9fs_dentry_operations
;
1993 d_instantiate(dentry
, inode
);
1995 /* Now set the ACL based on the default value */
1996 v9fs_set_create_acl(dentry
, dacl
, pacl
);
1999 p9_client_clunk(fid
);
2004 v9fs_vfs_readlink_dotl(struct dentry
*dentry
, char *buffer
, int buflen
)
2008 char *target
= NULL
;
2010 P9_DPRINTK(P9_DEBUG_VFS
, " %s\n", dentry
->d_name
.name
);
2012 fid
= v9fs_fid_lookup(dentry
);
2014 return PTR_ERR(fid
);
2016 retval
= p9_client_readlink(fid
, &target
);
2020 strncpy(buffer
, target
, buflen
);
2021 P9_DPRINTK(P9_DEBUG_VFS
, "%s -> %s\n", dentry
->d_name
.name
, buffer
);
2023 retval
= strnlen(buffer
, buflen
);
2028 * v9fs_vfs_follow_link_dotl - follow a symlink path
2029 * @dentry: dentry for symlink
2035 v9fs_vfs_follow_link_dotl(struct dentry
*dentry
, struct nameidata
*nd
)
2038 char *link
= __getname();
2040 P9_DPRINTK(P9_DEBUG_VFS
, "%s n", dentry
->d_name
.name
);
2043 link
= ERR_PTR(-ENOMEM
);
2045 len
= v9fs_vfs_readlink_dotl(dentry
, link
, PATH_MAX
);
2048 link
= ERR_PTR(len
);
2050 link
[min(len
, PATH_MAX
-1)] = 0;
2052 nd_set_link(nd
, link
);
2057 static const struct inode_operations v9fs_dir_inode_operations_dotu
= {
2058 .create
= v9fs_vfs_create
,
2059 .lookup
= v9fs_vfs_lookup
,
2060 .symlink
= v9fs_vfs_symlink
,
2061 .link
= v9fs_vfs_link
,
2062 .unlink
= v9fs_vfs_unlink
,
2063 .mkdir
= v9fs_vfs_mkdir
,
2064 .rmdir
= v9fs_vfs_rmdir
,
2065 .mknod
= v9fs_vfs_mknod
,
2066 .rename
= v9fs_vfs_rename
,
2067 .getattr
= v9fs_vfs_getattr
,
2068 .setattr
= v9fs_vfs_setattr
,
2071 static const struct inode_operations v9fs_dir_inode_operations_dotl
= {
2072 .create
= v9fs_vfs_create_dotl
,
2073 .lookup
= v9fs_vfs_lookup
,
2074 .link
= v9fs_vfs_link_dotl
,
2075 .symlink
= v9fs_vfs_symlink_dotl
,
2076 .unlink
= v9fs_vfs_unlink
,
2077 .mkdir
= v9fs_vfs_mkdir_dotl
,
2078 .rmdir
= v9fs_vfs_rmdir
,
2079 .mknod
= v9fs_vfs_mknod_dotl
,
2080 .rename
= v9fs_vfs_rename
,
2081 .getattr
= v9fs_vfs_getattr_dotl
,
2082 .setattr
= v9fs_vfs_setattr_dotl
,
2083 .setxattr
= generic_setxattr
,
2084 .getxattr
= generic_getxattr
,
2085 .removexattr
= generic_removexattr
,
2086 .listxattr
= v9fs_listxattr
,
2087 .check_acl
= v9fs_check_acl
,
2090 static const struct inode_operations v9fs_dir_inode_operations
= {
2091 .create
= v9fs_vfs_create
,
2092 .lookup
= v9fs_vfs_lookup
,
2093 .unlink
= v9fs_vfs_unlink
,
2094 .mkdir
= v9fs_vfs_mkdir
,
2095 .rmdir
= v9fs_vfs_rmdir
,
2096 .mknod
= v9fs_vfs_mknod
,
2097 .rename
= v9fs_vfs_rename
,
2098 .getattr
= v9fs_vfs_getattr
,
2099 .setattr
= v9fs_vfs_setattr
,
2102 static const struct inode_operations v9fs_file_inode_operations
= {
2103 .getattr
= v9fs_vfs_getattr
,
2104 .setattr
= v9fs_vfs_setattr
,
2107 static const struct inode_operations v9fs_file_inode_operations_dotl
= {
2108 .getattr
= v9fs_vfs_getattr_dotl
,
2109 .setattr
= v9fs_vfs_setattr_dotl
,
2110 .setxattr
= generic_setxattr
,
2111 .getxattr
= generic_getxattr
,
2112 .removexattr
= generic_removexattr
,
2113 .listxattr
= v9fs_listxattr
,
2114 .check_acl
= v9fs_check_acl
,
2117 static const struct inode_operations v9fs_symlink_inode_operations
= {
2118 .readlink
= generic_readlink
,
2119 .follow_link
= v9fs_vfs_follow_link
,
2120 .put_link
= v9fs_vfs_put_link
,
2121 .getattr
= v9fs_vfs_getattr
,
2122 .setattr
= v9fs_vfs_setattr
,
2125 static const struct inode_operations v9fs_symlink_inode_operations_dotl
= {
2126 .readlink
= v9fs_vfs_readlink_dotl
,
2127 .follow_link
= v9fs_vfs_follow_link_dotl
,
2128 .put_link
= v9fs_vfs_put_link
,
2129 .getattr
= v9fs_vfs_getattr_dotl
,
2130 .setattr
= v9fs_vfs_setattr_dotl
,
2131 .setxattr
= generic_setxattr
,
2132 .getxattr
= generic_getxattr
,
2133 .removexattr
= generic_removexattr
,
2134 .listxattr
= v9fs_listxattr
,