2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
10 #include <linux/sched.h>
11 #include <linux/slab.h>
12 #include <linux/spinlock.h>
13 #include <linux/completion.h>
14 #include <linux/buffer_head.h>
15 #include <linux/namei.h>
16 #include <linux/utsname.h>
18 #include <linux/xattr.h>
19 #include <linux/posix_acl.h>
20 #include <linux/gfs2_ondisk.h>
21 #include <linux/crc32.h>
22 #include <linux/lm_interface.h>
23 #include <asm/uaccess.h>
35 #include "ops_dentry.h"
36 #include "ops_inode.h"
43 * gfs2_create - Create a file
44 * @dir: The directory in which to create the file
45 * @dentry: The dentry of the new file
46 * @mode: The mode of the new file
51 static int gfs2_create(struct inode
*dir
, struct dentry
*dentry
,
52 int mode
, struct nameidata
*nd
)
54 struct gfs2_inode
*dip
= GFS2_I(dir
);
55 struct gfs2_sbd
*sdp
= GFS2_SB(dir
);
56 struct gfs2_holder ghs
[2];
59 gfs2_holder_init(dip
->i_gl
, 0, 0, ghs
);
62 inode
= gfs2_createi(ghs
, &dentry
->d_name
, S_IFREG
| mode
, 0);
65 if (dip
->i_alloc
.al_rgd
)
66 gfs2_inplace_release(dip
);
67 gfs2_quota_unlock(dip
);
69 gfs2_glock_dq_uninit_m(2, ghs
);
70 mark_inode_dirty(inode
);
72 } else if (PTR_ERR(inode
) != -EEXIST
||
73 (nd
->intent
.open
.flags
& O_EXCL
)) {
74 gfs2_holder_uninit(ghs
);
75 return PTR_ERR(inode
);
78 inode
= gfs2_lookupi(dir
, &dentry
->d_name
, 0, nd
);
81 gfs2_holder_uninit(ghs
);
84 gfs2_holder_uninit(ghs
);
85 return PTR_ERR(inode
);
90 d_instantiate(dentry
, inode
);
96 * gfs2_lookup - Look up a filename in a directory and return its inode
97 * @dir: The directory inode
98 * @dentry: The dentry of the new inode
99 * @nd: passed from Linux VFS, ignored by us
101 * Called by the VFS layer. Lock dir and call gfs2_lookupi()
106 static struct dentry
*gfs2_lookup(struct inode
*dir
, struct dentry
*dentry
,
107 struct nameidata
*nd
)
109 struct inode
*inode
= NULL
;
111 dentry
->d_op
= &gfs2_dops
;
113 inode
= gfs2_lookupi(dir
, &dentry
->d_name
, 0, nd
);
114 if (inode
&& IS_ERR(inode
))
115 return ERR_PTR(PTR_ERR(inode
));
118 return d_splice_alias(inode
, dentry
);
119 d_add(dentry
, inode
);
125 * gfs2_link - Link to a file
126 * @old_dentry: The inode to link
127 * @dir: Add link to this directory
128 * @dentry: The name of the link
130 * Link the inode in "old_dentry" into the directory "dir" with the
136 static int gfs2_link(struct dentry
*old_dentry
, struct inode
*dir
,
137 struct dentry
*dentry
)
139 struct gfs2_inode
*dip
= GFS2_I(dir
);
140 struct gfs2_sbd
*sdp
= GFS2_SB(dir
);
141 struct inode
*inode
= old_dentry
->d_inode
;
142 struct gfs2_inode
*ip
= GFS2_I(inode
);
143 struct gfs2_holder ghs
[2];
147 if (S_ISDIR(inode
->i_mode
))
150 gfs2_holder_init(dip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
);
151 gfs2_holder_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
+ 1);
153 error
= gfs2_glock_nq_m(2, ghs
);
157 error
= permission(dir
, MAY_WRITE
| MAY_EXEC
, NULL
);
161 error
= gfs2_dir_search(dir
, &dentry
->d_name
, NULL
, NULL
);
172 if (!dip
->i_inode
.i_nlink
)
175 if (dip
->i_di
.di_entries
== (u32
)-1)
178 if (IS_IMMUTABLE(inode
) || IS_APPEND(inode
))
181 if (!ip
->i_inode
.i_nlink
)
184 if (ip
->i_inode
.i_nlink
== (u32
)-1)
187 alloc_required
= error
= gfs2_diradd_alloc_required(dir
, &dentry
->d_name
);
192 if (alloc_required
) {
193 struct gfs2_alloc
*al
= gfs2_alloc_get(dip
);
195 error
= gfs2_quota_lock(dip
, NO_QUOTA_CHANGE
, NO_QUOTA_CHANGE
);
199 error
= gfs2_quota_check(dip
, dip
->i_inode
.i_uid
, dip
->i_inode
.i_gid
);
203 al
->al_requested
= sdp
->sd_max_dirres
;
205 error
= gfs2_inplace_reserve(dip
);
209 error
= gfs2_trans_begin(sdp
, sdp
->sd_max_dirres
+
210 al
->al_rgd
->rd_ri
.ri_length
+
211 2 * RES_DINODE
+ RES_STATFS
+
216 error
= gfs2_trans_begin(sdp
, 2 * RES_DINODE
+ RES_LEAF
, 0);
221 error
= gfs2_dir_add(dir
, &dentry
->d_name
, &ip
->i_num
,
222 IF2DT(inode
->i_mode
));
226 error
= gfs2_change_nlink(ip
, +1);
232 gfs2_inplace_release(dip
);
235 gfs2_quota_unlock(dip
);
240 gfs2_glock_dq_m(2, ghs
);
242 gfs2_holder_uninit(ghs
);
243 gfs2_holder_uninit(ghs
+ 1);
245 atomic_inc(&inode
->i_count
);
246 d_instantiate(dentry
, inode
);
247 mark_inode_dirty(inode
);
253 * gfs2_unlink - Unlink a file
254 * @dir: The inode of the directory containing the file to unlink
255 * @dentry: The file itself
257 * Unlink a file. Call gfs2_unlinki()
262 static int gfs2_unlink(struct inode
*dir
, struct dentry
*dentry
)
264 struct gfs2_inode
*dip
= GFS2_I(dir
);
265 struct gfs2_sbd
*sdp
= GFS2_SB(dir
);
266 struct gfs2_inode
*ip
= GFS2_I(dentry
->d_inode
);
267 struct gfs2_holder ghs
[2];
270 gfs2_holder_init(dip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
);
271 gfs2_holder_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
+ 1);
273 error
= gfs2_glock_nq_m(2, ghs
);
277 error
= gfs2_unlink_ok(dip
, &dentry
->d_name
, ip
);
281 error
= gfs2_trans_begin(sdp
, 2*RES_DINODE
+ RES_LEAF
+ RES_RG_BIT
, 0);
285 error
= gfs2_dir_del(dip
, &dentry
->d_name
);
289 error
= gfs2_change_nlink(ip
, -1);
294 gfs2_glock_dq_m(2, ghs
);
296 gfs2_holder_uninit(ghs
);
297 gfs2_holder_uninit(ghs
+ 1);
302 * gfs2_symlink - Create a symlink
303 * @dir: The directory to create the symlink in
304 * @dentry: The dentry to put the symlink in
305 * @symname: The thing which the link points to
310 static int gfs2_symlink(struct inode
*dir
, struct dentry
*dentry
,
313 struct gfs2_inode
*dip
= GFS2_I(dir
), *ip
;
314 struct gfs2_sbd
*sdp
= GFS2_SB(dir
);
315 struct gfs2_holder ghs
[2];
317 struct buffer_head
*dibh
;
321 /* Must be stuffed with a null terminator for gfs2_follow_link() */
322 size
= strlen(symname
);
323 if (size
> sdp
->sd_sb
.sb_bsize
- sizeof(struct gfs2_dinode
) - 1)
324 return -ENAMETOOLONG
;
326 gfs2_holder_init(dip
->i_gl
, 0, 0, ghs
);
328 inode
= gfs2_createi(ghs
, &dentry
->d_name
, S_IFLNK
| S_IRWXUGO
, 0);
330 gfs2_holder_uninit(ghs
);
331 return PTR_ERR(inode
);
334 ip
= ghs
[1].gh_gl
->gl_object
;
336 ip
->i_di
.di_size
= size
;
338 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
340 if (!gfs2_assert_withdraw(sdp
, !error
)) {
341 gfs2_dinode_out(ip
, dibh
->b_data
);
342 memcpy(dibh
->b_data
+ sizeof(struct gfs2_dinode
), symname
,
348 if (dip
->i_alloc
.al_rgd
)
349 gfs2_inplace_release(dip
);
350 gfs2_quota_unlock(dip
);
353 gfs2_glock_dq_uninit_m(2, ghs
);
355 d_instantiate(dentry
, inode
);
356 mark_inode_dirty(inode
);
362 * gfs2_mkdir - Make a directory
363 * @dir: The parent directory of the new one
364 * @dentry: The dentry of the new directory
365 * @mode: The mode of the new directory
370 static int gfs2_mkdir(struct inode
*dir
, struct dentry
*dentry
, int mode
)
372 struct gfs2_inode
*dip
= GFS2_I(dir
), *ip
;
373 struct gfs2_sbd
*sdp
= GFS2_SB(dir
);
374 struct gfs2_holder ghs
[2];
376 struct buffer_head
*dibh
;
379 gfs2_holder_init(dip
->i_gl
, 0, 0, ghs
);
381 inode
= gfs2_createi(ghs
, &dentry
->d_name
, S_IFDIR
| mode
, 0);
383 gfs2_holder_uninit(ghs
);
384 return PTR_ERR(inode
);
387 ip
= ghs
[1].gh_gl
->gl_object
;
389 ip
->i_inode
.i_nlink
= 2;
390 ip
->i_di
.di_size
= sdp
->sd_sb
.sb_bsize
- sizeof(struct gfs2_dinode
);
391 ip
->i_di
.di_flags
|= GFS2_DIF_JDATA
;
392 ip
->i_di
.di_entries
= 2;
394 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
396 if (!gfs2_assert_withdraw(sdp
, !error
)) {
397 struct gfs2_dinode
*di
= (struct gfs2_dinode
*)dibh
->b_data
;
398 struct gfs2_dirent
*dent
= (struct gfs2_dirent
*)(di
+1);
401 gfs2_str2qstr(&str
, ".");
402 gfs2_trans_add_bh(ip
->i_gl
, dibh
, 1);
403 gfs2_qstr2dirent(&str
, GFS2_DIRENT_SIZE(str
.len
), dent
);
404 dent
->de_inum
= di
->di_num
; /* already GFS2 endian */
405 dent
->de_type
= cpu_to_be16(DT_DIR
);
406 di
->di_entries
= cpu_to_be32(1);
408 gfs2_str2qstr(&str
, "..");
409 dent
= (struct gfs2_dirent
*)((char*)dent
+ GFS2_DIRENT_SIZE(1));
410 gfs2_qstr2dirent(&str
, dibh
->b_size
- GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode
), dent
);
412 gfs2_inum_out(&dip
->i_num
, &dent
->de_inum
);
413 dent
->de_type
= cpu_to_be16(DT_DIR
);
415 gfs2_dinode_out(ip
, di
);
420 error
= gfs2_change_nlink(dip
, +1);
421 gfs2_assert_withdraw(sdp
, !error
); /* dip already pinned */
424 if (dip
->i_alloc
.al_rgd
)
425 gfs2_inplace_release(dip
);
426 gfs2_quota_unlock(dip
);
429 gfs2_glock_dq_uninit_m(2, ghs
);
431 d_instantiate(dentry
, inode
);
432 mark_inode_dirty(inode
);
438 * gfs2_rmdir - Remove a directory
439 * @dir: The parent directory of the directory to be removed
440 * @dentry: The dentry of the directory to remove
442 * Remove a directory. Call gfs2_rmdiri()
447 static int gfs2_rmdir(struct inode
*dir
, struct dentry
*dentry
)
449 struct gfs2_inode
*dip
= GFS2_I(dir
);
450 struct gfs2_sbd
*sdp
= GFS2_SB(dir
);
451 struct gfs2_inode
*ip
= GFS2_I(dentry
->d_inode
);
452 struct gfs2_holder ghs
[2];
455 gfs2_holder_init(dip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
);
456 gfs2_holder_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
+ 1);
458 error
= gfs2_glock_nq_m(2, ghs
);
462 error
= gfs2_unlink_ok(dip
, &dentry
->d_name
, ip
);
466 if (ip
->i_di
.di_entries
< 2) {
467 if (gfs2_consist_inode(ip
))
468 gfs2_dinode_print(ip
);
472 if (ip
->i_di
.di_entries
> 2) {
477 error
= gfs2_trans_begin(sdp
, 2 * RES_DINODE
+ 3 * RES_LEAF
+ RES_RG_BIT
, 0);
481 error
= gfs2_rmdiri(dip
, &dentry
->d_name
, ip
);
486 gfs2_glock_dq_m(2, ghs
);
488 gfs2_holder_uninit(ghs
);
489 gfs2_holder_uninit(ghs
+ 1);
494 * gfs2_mknod - Make a special file
495 * @dir: The directory in which the special file will reside
496 * @dentry: The dentry of the special file
497 * @mode: The mode of the special file
498 * @rdev: The device specification of the special file
502 static int gfs2_mknod(struct inode
*dir
, struct dentry
*dentry
, int mode
,
505 struct gfs2_inode
*dip
= GFS2_I(dir
);
506 struct gfs2_sbd
*sdp
= GFS2_SB(dir
);
507 struct gfs2_holder ghs
[2];
510 gfs2_holder_init(dip
->i_gl
, 0, 0, ghs
);
512 inode
= gfs2_createi(ghs
, &dentry
->d_name
, mode
, dev
);
514 gfs2_holder_uninit(ghs
);
515 return PTR_ERR(inode
);
519 if (dip
->i_alloc
.al_rgd
)
520 gfs2_inplace_release(dip
);
521 gfs2_quota_unlock(dip
);
524 gfs2_glock_dq_uninit_m(2, ghs
);
526 d_instantiate(dentry
, inode
);
527 mark_inode_dirty(inode
);
533 * gfs2_rename - Rename a file
534 * @odir: Parent directory of old file name
535 * @odentry: The old dentry of the file
536 * @ndir: Parent directory of new file name
537 * @ndentry: The new dentry of the file
542 static int gfs2_rename(struct inode
*odir
, struct dentry
*odentry
,
543 struct inode
*ndir
, struct dentry
*ndentry
)
545 struct gfs2_inode
*odip
= GFS2_I(odir
);
546 struct gfs2_inode
*ndip
= GFS2_I(ndir
);
547 struct gfs2_inode
*ip
= GFS2_I(odentry
->d_inode
);
548 struct gfs2_inode
*nip
= NULL
;
549 struct gfs2_sbd
*sdp
= GFS2_SB(odir
);
550 struct gfs2_holder ghs
[4], r_gh
;
557 if (ndentry
->d_inode
) {
558 nip
= GFS2_I(ndentry
->d_inode
);
563 /* Make sure we aren't trying to move a dirctory into it's subdir */
565 if (S_ISDIR(ip
->i_inode
.i_mode
) && odip
!= ndip
) {
568 error
= gfs2_glock_nq_init(sdp
->sd_rename_gl
, LM_ST_EXCLUSIVE
, 0,
573 error
= gfs2_ok_to_move(ip
, ndip
);
579 gfs2_holder_init(odip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
);
581 gfs2_holder_init(ndip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
+ num_gh
);
584 gfs2_holder_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
+ num_gh
);
588 gfs2_holder_init(nip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
+ num_gh
);
592 error
= gfs2_glock_nq_m(num_gh
, ghs
);
596 /* Check out the old directory */
598 error
= gfs2_unlink_ok(odip
, &odentry
->d_name
, ip
);
602 /* Check out the new directory */
605 error
= gfs2_unlink_ok(ndip
, &ndentry
->d_name
, nip
);
609 if (S_ISDIR(nip
->i_inode
.i_mode
)) {
610 if (nip
->i_di
.di_entries
< 2) {
611 if (gfs2_consist_inode(nip
))
612 gfs2_dinode_print(nip
);
616 if (nip
->i_di
.di_entries
> 2) {
622 error
= permission(ndir
, MAY_WRITE
| MAY_EXEC
, NULL
);
626 error
= gfs2_dir_search(ndir
, &ndentry
->d_name
, NULL
, NULL
);
638 if (!ndip
->i_inode
.i_nlink
) {
642 if (ndip
->i_di
.di_entries
== (u32
)-1) {
646 if (S_ISDIR(ip
->i_inode
.i_mode
) &&
647 ndip
->i_inode
.i_nlink
== (u32
)-1) {
654 /* Check out the dir to be renamed */
657 error
= permission(odentry
->d_inode
, MAY_WRITE
, NULL
);
662 alloc_required
= error
= gfs2_diradd_alloc_required(ndir
, &ndentry
->d_name
);
667 if (alloc_required
) {
668 struct gfs2_alloc
*al
= gfs2_alloc_get(ndip
);
670 error
= gfs2_quota_lock(ndip
, NO_QUOTA_CHANGE
, NO_QUOTA_CHANGE
);
674 error
= gfs2_quota_check(ndip
, ndip
->i_inode
.i_uid
, ndip
->i_inode
.i_gid
);
678 al
->al_requested
= sdp
->sd_max_dirres
;
680 error
= gfs2_inplace_reserve(ndip
);
684 error
= gfs2_trans_begin(sdp
, sdp
->sd_max_dirres
+
685 al
->al_rgd
->rd_ri
.ri_length
+
686 4 * RES_DINODE
+ 4 * RES_LEAF
+
687 RES_STATFS
+ RES_QUOTA
, 0);
691 error
= gfs2_trans_begin(sdp
, 4 * RES_DINODE
+
697 /* Remove the target file, if it exists */
700 if (S_ISDIR(nip
->i_inode
.i_mode
))
701 error
= gfs2_rmdiri(ndip
, &ndentry
->d_name
, nip
);
703 error
= gfs2_dir_del(ndip
, &ndentry
->d_name
);
706 error
= gfs2_change_nlink(nip
, -1);
714 gfs2_str2qstr(&name
, "..");
716 error
= gfs2_change_nlink(ndip
, +1);
719 error
= gfs2_change_nlink(odip
, -1);
723 error
= gfs2_dir_mvino(ip
, &name
, &ndip
->i_num
, DT_DIR
);
727 struct buffer_head
*dibh
;
728 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
731 ip
->i_inode
.i_ctime
.tv_sec
= get_seconds();
732 gfs2_trans_add_bh(ip
->i_gl
, dibh
, 1);
733 gfs2_dinode_out(ip
, dibh
->b_data
);
737 error
= gfs2_dir_del(odip
, &odentry
->d_name
);
741 error
= gfs2_dir_add(ndir
, &ndentry
->d_name
, &ip
->i_num
,
742 IF2DT(ip
->i_inode
.i_mode
));
750 gfs2_inplace_release(ndip
);
753 gfs2_quota_unlock(ndip
);
756 gfs2_alloc_put(ndip
);
758 gfs2_glock_dq_m(num_gh
, ghs
);
760 for (x
= 0; x
< num_gh
; x
++)
761 gfs2_holder_uninit(ghs
+ x
);
764 gfs2_glock_dq_uninit(&r_gh
);
770 * gfs2_readlink - Read the value of a symlink
771 * @dentry: the symlink
772 * @buf: the buffer to read the symlink data into
773 * @size: the size of the buffer
778 static int gfs2_readlink(struct dentry
*dentry
, char __user
*user_buf
,
781 struct gfs2_inode
*ip
= GFS2_I(dentry
->d_inode
);
782 char array
[GFS2_FAST_NAME_SIZE
], *buf
= array
;
783 unsigned int len
= GFS2_FAST_NAME_SIZE
;
786 error
= gfs2_readlinki(ip
, &buf
, &len
);
790 if (user_size
> len
- 1)
793 if (copy_to_user(user_buf
, buf
, user_size
))
805 * gfs2_follow_link - Follow a symbolic link
806 * @dentry: The dentry of the link
807 * @nd: Data that we pass to vfs_follow_link()
809 * This can handle symlinks of any size. It is optimised for symlinks
810 * under GFS2_FAST_NAME_SIZE.
812 * Returns: 0 on success or error code
815 static void *gfs2_follow_link(struct dentry
*dentry
, struct nameidata
*nd
)
817 struct gfs2_inode
*ip
= GFS2_I(dentry
->d_inode
);
818 char array
[GFS2_FAST_NAME_SIZE
], *buf
= array
;
819 unsigned int len
= GFS2_FAST_NAME_SIZE
;
822 error
= gfs2_readlinki(ip
, &buf
, &len
);
824 error
= vfs_follow_link(nd
, buf
);
829 return ERR_PTR(error
);
836 * @nd: passed from Linux VFS, ignored by us
841 static int gfs2_permission(struct inode
*inode
, int mask
, struct nameidata
*nd
)
843 struct gfs2_inode
*ip
= GFS2_I(inode
);
844 struct gfs2_holder i_gh
;
847 if (ip
->i_vn
== ip
->i_gl
->gl_vn
)
848 return generic_permission(inode
, mask
, gfs2_check_acl
);
850 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_SHARED
, LM_FLAG_ANY
, &i_gh
);
852 error
= generic_permission(inode
, mask
, gfs2_check_acl_locked
);
853 gfs2_glock_dq_uninit(&i_gh
);
859 static int setattr_size(struct inode
*inode
, struct iattr
*attr
)
861 struct gfs2_inode
*ip
= GFS2_I(inode
);
864 if (attr
->ia_size
!= ip
->i_di
.di_size
) {
865 error
= vmtruncate(inode
, attr
->ia_size
);
870 error
= gfs2_truncatei(ip
, attr
->ia_size
);
877 static int setattr_chown(struct inode
*inode
, struct iattr
*attr
)
879 struct gfs2_inode
*ip
= GFS2_I(inode
);
880 struct gfs2_sbd
*sdp
= GFS2_SB(inode
);
881 struct buffer_head
*dibh
;
882 u32 ouid
, ogid
, nuid
, ngid
;
890 if (!(attr
->ia_valid
& ATTR_UID
) || ouid
== nuid
)
891 ouid
= nuid
= NO_QUOTA_CHANGE
;
892 if (!(attr
->ia_valid
& ATTR_GID
) || ogid
== ngid
)
893 ogid
= ngid
= NO_QUOTA_CHANGE
;
897 error
= gfs2_quota_lock(ip
, nuid
, ngid
);
901 if (ouid
!= NO_QUOTA_CHANGE
|| ogid
!= NO_QUOTA_CHANGE
) {
902 error
= gfs2_quota_check(ip
, nuid
, ngid
);
907 error
= gfs2_trans_begin(sdp
, RES_DINODE
+ 2 * RES_QUOTA
, 0);
911 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
915 error
= inode_setattr(inode
, attr
);
916 gfs2_assert_warn(sdp
, !error
);
918 gfs2_trans_add_bh(ip
->i_gl
, dibh
, 1);
919 gfs2_dinode_out(ip
, dibh
->b_data
);
922 if (ouid
!= NO_QUOTA_CHANGE
|| ogid
!= NO_QUOTA_CHANGE
) {
923 gfs2_quota_change(ip
, -ip
->i_di
.di_blocks
, ouid
, ogid
);
924 gfs2_quota_change(ip
, ip
->i_di
.di_blocks
, nuid
, ngid
);
930 gfs2_quota_unlock(ip
);
937 * gfs2_setattr - Change attributes on an inode
938 * @dentry: The dentry which is changing
939 * @attr: The structure describing the change
941 * The VFS layer wants to change one or more of an inodes attributes. Write
942 * that change out to disk.
947 static int gfs2_setattr(struct dentry
*dentry
, struct iattr
*attr
)
949 struct inode
*inode
= dentry
->d_inode
;
950 struct gfs2_inode
*ip
= GFS2_I(inode
);
951 struct gfs2_holder i_gh
;
954 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, &i_gh
);
959 if (IS_IMMUTABLE(inode
) || IS_APPEND(inode
))
962 error
= inode_change_ok(inode
, attr
);
966 if (attr
->ia_valid
& ATTR_SIZE
)
967 error
= setattr_size(inode
, attr
);
968 else if (attr
->ia_valid
& (ATTR_UID
| ATTR_GID
))
969 error
= setattr_chown(inode
, attr
);
970 else if ((attr
->ia_valid
& ATTR_MODE
) && IS_POSIXACL(inode
))
971 error
= gfs2_acl_chmod(ip
, attr
);
973 error
= gfs2_setattr_simple(ip
, attr
);
976 gfs2_glock_dq_uninit(&i_gh
);
978 mark_inode_dirty(inode
);
983 * gfs2_getattr - Read out an inode's attributes
984 * @mnt: The vfsmount the inode is being accessed from
985 * @dentry: The dentry to stat
986 * @stat: The inode's stats
991 static int gfs2_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
,
994 struct inode
*inode
= dentry
->d_inode
;
995 struct gfs2_inode
*ip
= GFS2_I(inode
);
996 struct gfs2_holder gh
;
999 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_SHARED
, LM_FLAG_ANY
, &gh
);
1001 generic_fillattr(inode
, stat
);
1002 gfs2_glock_dq_uninit(&gh
);
1008 static int gfs2_setxattr(struct dentry
*dentry
, const char *name
,
1009 const void *data
, size_t size
, int flags
)
1011 struct inode
*inode
= dentry
->d_inode
;
1012 struct gfs2_ea_request er
;
1014 memset(&er
, 0, sizeof(struct gfs2_ea_request
));
1015 er
.er_type
= gfs2_ea_name2type(name
, &er
.er_name
);
1016 if (er
.er_type
== GFS2_EATYPE_UNUSED
)
1018 er
.er_data
= (char *)data
;
1019 er
.er_name_len
= strlen(er
.er_name
);
1020 er
.er_data_len
= size
;
1021 er
.er_flags
= flags
;
1023 gfs2_assert_warn(GFS2_SB(inode
), !(er
.er_flags
& GFS2_ERF_MODE
));
1025 return gfs2_ea_set(GFS2_I(inode
), &er
);
1028 static ssize_t
gfs2_getxattr(struct dentry
*dentry
, const char *name
,
1029 void *data
, size_t size
)
1031 struct gfs2_ea_request er
;
1033 memset(&er
, 0, sizeof(struct gfs2_ea_request
));
1034 er
.er_type
= gfs2_ea_name2type(name
, &er
.er_name
);
1035 if (er
.er_type
== GFS2_EATYPE_UNUSED
)
1038 er
.er_name_len
= strlen(er
.er_name
);
1039 er
.er_data_len
= size
;
1041 return gfs2_ea_get(GFS2_I(dentry
->d_inode
), &er
);
1044 static ssize_t
gfs2_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
)
1046 struct gfs2_ea_request er
;
1048 memset(&er
, 0, sizeof(struct gfs2_ea_request
));
1049 er
.er_data
= (size
) ? buffer
: NULL
;
1050 er
.er_data_len
= size
;
1052 return gfs2_ea_list(GFS2_I(dentry
->d_inode
), &er
);
1055 static int gfs2_removexattr(struct dentry
*dentry
, const char *name
)
1057 struct gfs2_ea_request er
;
1059 memset(&er
, 0, sizeof(struct gfs2_ea_request
));
1060 er
.er_type
= gfs2_ea_name2type(name
, &er
.er_name
);
1061 if (er
.er_type
== GFS2_EATYPE_UNUSED
)
1063 er
.er_name_len
= strlen(er
.er_name
);
1065 return gfs2_ea_remove(GFS2_I(dentry
->d_inode
), &er
);
1068 struct inode_operations gfs2_file_iops
= {
1069 .permission
= gfs2_permission
,
1070 .setattr
= gfs2_setattr
,
1071 .getattr
= gfs2_getattr
,
1072 .setxattr
= gfs2_setxattr
,
1073 .getxattr
= gfs2_getxattr
,
1074 .listxattr
= gfs2_listxattr
,
1075 .removexattr
= gfs2_removexattr
,
1078 struct inode_operations gfs2_dev_iops
= {
1079 .permission
= gfs2_permission
,
1080 .setattr
= gfs2_setattr
,
1081 .getattr
= gfs2_getattr
,
1082 .setxattr
= gfs2_setxattr
,
1083 .getxattr
= gfs2_getxattr
,
1084 .listxattr
= gfs2_listxattr
,
1085 .removexattr
= gfs2_removexattr
,
1088 struct inode_operations gfs2_dir_iops
= {
1089 .create
= gfs2_create
,
1090 .lookup
= gfs2_lookup
,
1092 .unlink
= gfs2_unlink
,
1093 .symlink
= gfs2_symlink
,
1094 .mkdir
= gfs2_mkdir
,
1095 .rmdir
= gfs2_rmdir
,
1096 .mknod
= gfs2_mknod
,
1097 .rename
= gfs2_rename
,
1098 .permission
= gfs2_permission
,
1099 .setattr
= gfs2_setattr
,
1100 .getattr
= gfs2_getattr
,
1101 .setxattr
= gfs2_setxattr
,
1102 .getxattr
= gfs2_getxattr
,
1103 .listxattr
= gfs2_listxattr
,
1104 .removexattr
= gfs2_removexattr
,
1107 struct inode_operations gfs2_symlink_iops
= {
1108 .readlink
= gfs2_readlink
,
1109 .follow_link
= gfs2_follow_link
,
1110 .permission
= gfs2_permission
,
1111 .setattr
= gfs2_setattr
,
1112 .getattr
= gfs2_getattr
,
1113 .setxattr
= gfs2_setxattr
,
1114 .getxattr
= gfs2_getxattr
,
1115 .listxattr
= gfs2_listxattr
,
1116 .removexattr
= gfs2_removexattr
,