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
[3];
268 struct gfs2_rgrpd
*rgd
;
269 struct gfs2_holder ri_gh
;
272 error
= gfs2_rindex_hold(sdp
, &ri_gh
);
276 gfs2_holder_init(dip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
);
277 gfs2_holder_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
+ 1);
279 rgd
= gfs2_blk2rgrpd(sdp
, ip
->i_num
.no_addr
);
280 gfs2_holder_init(rgd
->rd_gl
, LM_ST_EXCLUSIVE
, 0, ghs
+ 2);
283 error
= gfs2_glock_nq_m(3, ghs
);
287 error
= gfs2_unlink_ok(dip
, &dentry
->d_name
, ip
);
291 error
= gfs2_trans_begin(sdp
, 2*RES_DINODE
+ RES_LEAF
+ RES_RG_BIT
, 0);
295 error
= gfs2_dir_del(dip
, &dentry
->d_name
);
299 error
= gfs2_change_nlink(ip
, -1);
304 gfs2_glock_dq_m(3, ghs
);
306 gfs2_holder_uninit(ghs
);
307 gfs2_holder_uninit(ghs
+ 1);
308 gfs2_holder_uninit(ghs
+ 2);
309 gfs2_glock_dq_uninit(&ri_gh
);
314 * gfs2_symlink - Create a symlink
315 * @dir: The directory to create the symlink in
316 * @dentry: The dentry to put the symlink in
317 * @symname: The thing which the link points to
322 static int gfs2_symlink(struct inode
*dir
, struct dentry
*dentry
,
325 struct gfs2_inode
*dip
= GFS2_I(dir
), *ip
;
326 struct gfs2_sbd
*sdp
= GFS2_SB(dir
);
327 struct gfs2_holder ghs
[2];
329 struct buffer_head
*dibh
;
333 /* Must be stuffed with a null terminator for gfs2_follow_link() */
334 size
= strlen(symname
);
335 if (size
> sdp
->sd_sb
.sb_bsize
- sizeof(struct gfs2_dinode
) - 1)
336 return -ENAMETOOLONG
;
338 gfs2_holder_init(dip
->i_gl
, 0, 0, ghs
);
340 inode
= gfs2_createi(ghs
, &dentry
->d_name
, S_IFLNK
| S_IRWXUGO
, 0);
342 gfs2_holder_uninit(ghs
);
343 return PTR_ERR(inode
);
346 ip
= ghs
[1].gh_gl
->gl_object
;
348 ip
->i_di
.di_size
= size
;
350 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
352 if (!gfs2_assert_withdraw(sdp
, !error
)) {
353 gfs2_dinode_out(ip
, dibh
->b_data
);
354 memcpy(dibh
->b_data
+ sizeof(struct gfs2_dinode
), symname
,
360 if (dip
->i_alloc
.al_rgd
)
361 gfs2_inplace_release(dip
);
362 gfs2_quota_unlock(dip
);
365 gfs2_glock_dq_uninit_m(2, ghs
);
367 d_instantiate(dentry
, inode
);
368 mark_inode_dirty(inode
);
374 * gfs2_mkdir - Make a directory
375 * @dir: The parent directory of the new one
376 * @dentry: The dentry of the new directory
377 * @mode: The mode of the new directory
382 static int gfs2_mkdir(struct inode
*dir
, struct dentry
*dentry
, int mode
)
384 struct gfs2_inode
*dip
= GFS2_I(dir
), *ip
;
385 struct gfs2_sbd
*sdp
= GFS2_SB(dir
);
386 struct gfs2_holder ghs
[2];
388 struct buffer_head
*dibh
;
391 gfs2_holder_init(dip
->i_gl
, 0, 0, ghs
);
393 inode
= gfs2_createi(ghs
, &dentry
->d_name
, S_IFDIR
| mode
, 0);
395 gfs2_holder_uninit(ghs
);
396 return PTR_ERR(inode
);
399 ip
= ghs
[1].gh_gl
->gl_object
;
401 ip
->i_inode
.i_nlink
= 2;
402 ip
->i_di
.di_size
= sdp
->sd_sb
.sb_bsize
- sizeof(struct gfs2_dinode
);
403 ip
->i_di
.di_flags
|= GFS2_DIF_JDATA
;
404 ip
->i_di
.di_entries
= 2;
406 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
408 if (!gfs2_assert_withdraw(sdp
, !error
)) {
409 struct gfs2_dinode
*di
= (struct gfs2_dinode
*)dibh
->b_data
;
410 struct gfs2_dirent
*dent
= (struct gfs2_dirent
*)(di
+1);
413 gfs2_str2qstr(&str
, ".");
414 gfs2_trans_add_bh(ip
->i_gl
, dibh
, 1);
415 gfs2_qstr2dirent(&str
, GFS2_DIRENT_SIZE(str
.len
), dent
);
416 dent
->de_inum
= di
->di_num
; /* already GFS2 endian */
417 dent
->de_type
= cpu_to_be16(DT_DIR
);
418 di
->di_entries
= cpu_to_be32(1);
420 gfs2_str2qstr(&str
, "..");
421 dent
= (struct gfs2_dirent
*)((char*)dent
+ GFS2_DIRENT_SIZE(1));
422 gfs2_qstr2dirent(&str
, dibh
->b_size
- GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode
), dent
);
424 gfs2_inum_out(&dip
->i_num
, &dent
->de_inum
);
425 dent
->de_type
= cpu_to_be16(DT_DIR
);
427 gfs2_dinode_out(ip
, di
);
432 error
= gfs2_change_nlink(dip
, +1);
433 gfs2_assert_withdraw(sdp
, !error
); /* dip already pinned */
436 if (dip
->i_alloc
.al_rgd
)
437 gfs2_inplace_release(dip
);
438 gfs2_quota_unlock(dip
);
441 gfs2_glock_dq_uninit_m(2, ghs
);
443 d_instantiate(dentry
, inode
);
444 mark_inode_dirty(inode
);
450 * gfs2_rmdir - Remove a directory
451 * @dir: The parent directory of the directory to be removed
452 * @dentry: The dentry of the directory to remove
454 * Remove a directory. Call gfs2_rmdiri()
459 static int gfs2_rmdir(struct inode
*dir
, struct dentry
*dentry
)
461 struct gfs2_inode
*dip
= GFS2_I(dir
);
462 struct gfs2_sbd
*sdp
= GFS2_SB(dir
);
463 struct gfs2_inode
*ip
= GFS2_I(dentry
->d_inode
);
464 struct gfs2_holder ghs
[3];
465 struct gfs2_rgrpd
*rgd
;
466 struct gfs2_holder ri_gh
;
470 error
= gfs2_rindex_hold(sdp
, &ri_gh
);
473 gfs2_holder_init(dip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
);
474 gfs2_holder_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
+ 1);
476 rgd
= gfs2_blk2rgrpd(sdp
, ip
->i_num
.no_addr
);
477 gfs2_holder_init(rgd
->rd_gl
, LM_ST_EXCLUSIVE
, 0, ghs
+ 2);
479 error
= gfs2_glock_nq_m(3, ghs
);
483 error
= gfs2_unlink_ok(dip
, &dentry
->d_name
, ip
);
487 if (ip
->i_di
.di_entries
< 2) {
488 if (gfs2_consist_inode(ip
))
489 gfs2_dinode_print(ip
);
493 if (ip
->i_di
.di_entries
> 2) {
498 error
= gfs2_trans_begin(sdp
, 2 * RES_DINODE
+ 3 * RES_LEAF
+ RES_RG_BIT
, 0);
502 error
= gfs2_rmdiri(dip
, &dentry
->d_name
, ip
);
507 gfs2_glock_dq_m(3, ghs
);
509 gfs2_holder_uninit(ghs
);
510 gfs2_holder_uninit(ghs
+ 1);
511 gfs2_holder_uninit(ghs
+ 2);
512 gfs2_glock_dq_uninit(&ri_gh
);
517 * gfs2_mknod - Make a special file
518 * @dir: The directory in which the special file will reside
519 * @dentry: The dentry of the special file
520 * @mode: The mode of the special file
521 * @rdev: The device specification of the special file
525 static int gfs2_mknod(struct inode
*dir
, struct dentry
*dentry
, int mode
,
528 struct gfs2_inode
*dip
= GFS2_I(dir
);
529 struct gfs2_sbd
*sdp
= GFS2_SB(dir
);
530 struct gfs2_holder ghs
[2];
533 gfs2_holder_init(dip
->i_gl
, 0, 0, ghs
);
535 inode
= gfs2_createi(ghs
, &dentry
->d_name
, mode
, dev
);
537 gfs2_holder_uninit(ghs
);
538 return PTR_ERR(inode
);
542 if (dip
->i_alloc
.al_rgd
)
543 gfs2_inplace_release(dip
);
544 gfs2_quota_unlock(dip
);
547 gfs2_glock_dq_uninit_m(2, ghs
);
549 d_instantiate(dentry
, inode
);
550 mark_inode_dirty(inode
);
556 * gfs2_rename - Rename a file
557 * @odir: Parent directory of old file name
558 * @odentry: The old dentry of the file
559 * @ndir: Parent directory of new file name
560 * @ndentry: The new dentry of the file
565 static int gfs2_rename(struct inode
*odir
, struct dentry
*odentry
,
566 struct inode
*ndir
, struct dentry
*ndentry
)
568 struct gfs2_inode
*odip
= GFS2_I(odir
);
569 struct gfs2_inode
*ndip
= GFS2_I(ndir
);
570 struct gfs2_inode
*ip
= GFS2_I(odentry
->d_inode
);
571 struct gfs2_inode
*nip
= NULL
;
572 struct gfs2_sbd
*sdp
= GFS2_SB(odir
);
573 struct gfs2_holder ghs
[5], r_gh
;
574 struct gfs2_rgrpd
*nrgd
;
581 if (ndentry
->d_inode
) {
582 nip
= GFS2_I(ndentry
->d_inode
);
587 /* Make sure we aren't trying to move a dirctory into it's subdir */
589 if (S_ISDIR(ip
->i_inode
.i_mode
) && odip
!= ndip
) {
592 error
= gfs2_glock_nq_init(sdp
->sd_rename_gl
, LM_ST_EXCLUSIVE
, 0,
597 error
= gfs2_ok_to_move(ip
, ndip
);
603 gfs2_holder_init(odip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
);
605 gfs2_holder_init(ndip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
+ num_gh
);
608 gfs2_holder_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
+ num_gh
);
612 gfs2_holder_init(nip
->i_gl
, LM_ST_EXCLUSIVE
, 0, ghs
+ num_gh
);
614 /* grab the resource lock for unlink flag twiddling
615 * this is the case of the target file already existing
616 * so we unlink before doing the rename
618 nrgd
= gfs2_blk2rgrpd(sdp
, nip
->i_num
.no_addr
);
620 gfs2_holder_init(nrgd
->rd_gl
, LM_ST_EXCLUSIVE
, 0, ghs
+ num_gh
++);
623 error
= gfs2_glock_nq_m(num_gh
, ghs
);
627 /* Check out the old directory */
629 error
= gfs2_unlink_ok(odip
, &odentry
->d_name
, ip
);
633 /* Check out the new directory */
636 error
= gfs2_unlink_ok(ndip
, &ndentry
->d_name
, nip
);
640 if (S_ISDIR(nip
->i_inode
.i_mode
)) {
641 if (nip
->i_di
.di_entries
< 2) {
642 if (gfs2_consist_inode(nip
))
643 gfs2_dinode_print(nip
);
647 if (nip
->i_di
.di_entries
> 2) {
653 error
= permission(ndir
, MAY_WRITE
| MAY_EXEC
, NULL
);
657 error
= gfs2_dir_search(ndir
, &ndentry
->d_name
, NULL
, NULL
);
669 if (!ndip
->i_inode
.i_nlink
) {
673 if (ndip
->i_di
.di_entries
== (u32
)-1) {
677 if (S_ISDIR(ip
->i_inode
.i_mode
) &&
678 ndip
->i_inode
.i_nlink
== (u32
)-1) {
685 /* Check out the dir to be renamed */
688 error
= permission(odentry
->d_inode
, MAY_WRITE
, NULL
);
693 alloc_required
= error
= gfs2_diradd_alloc_required(ndir
, &ndentry
->d_name
);
698 if (alloc_required
) {
699 struct gfs2_alloc
*al
= gfs2_alloc_get(ndip
);
701 error
= gfs2_quota_lock(ndip
, NO_QUOTA_CHANGE
, NO_QUOTA_CHANGE
);
705 error
= gfs2_quota_check(ndip
, ndip
->i_inode
.i_uid
, ndip
->i_inode
.i_gid
);
709 al
->al_requested
= sdp
->sd_max_dirres
;
711 error
= gfs2_inplace_reserve(ndip
);
715 error
= gfs2_trans_begin(sdp
, sdp
->sd_max_dirres
+
716 al
->al_rgd
->rd_ri
.ri_length
+
717 4 * RES_DINODE
+ 4 * RES_LEAF
+
718 RES_STATFS
+ RES_QUOTA
+ 4, 0);
722 error
= gfs2_trans_begin(sdp
, 4 * RES_DINODE
+
723 5 * RES_LEAF
+ 4, 0);
728 /* Remove the target file, if it exists */
731 if (S_ISDIR(nip
->i_inode
.i_mode
))
732 error
= gfs2_rmdiri(ndip
, &ndentry
->d_name
, nip
);
734 error
= gfs2_dir_del(ndip
, &ndentry
->d_name
);
737 error
= gfs2_change_nlink(nip
, -1);
745 gfs2_str2qstr(&name
, "..");
747 error
= gfs2_change_nlink(ndip
, +1);
750 error
= gfs2_change_nlink(odip
, -1);
754 error
= gfs2_dir_mvino(ip
, &name
, &ndip
->i_num
, DT_DIR
);
758 struct buffer_head
*dibh
;
759 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
762 ip
->i_inode
.i_ctime
= CURRENT_TIME_SEC
;
763 gfs2_trans_add_bh(ip
->i_gl
, dibh
, 1);
764 gfs2_dinode_out(ip
, dibh
->b_data
);
768 error
= gfs2_dir_del(odip
, &odentry
->d_name
);
772 error
= gfs2_dir_add(ndir
, &ndentry
->d_name
, &ip
->i_num
,
773 IF2DT(ip
->i_inode
.i_mode
));
781 gfs2_inplace_release(ndip
);
784 gfs2_quota_unlock(ndip
);
787 gfs2_alloc_put(ndip
);
789 gfs2_glock_dq_m(num_gh
, ghs
);
791 for (x
= 0; x
< num_gh
; x
++)
792 gfs2_holder_uninit(ghs
+ x
);
795 gfs2_glock_dq_uninit(&r_gh
);
801 * gfs2_readlink - Read the value of a symlink
802 * @dentry: the symlink
803 * @buf: the buffer to read the symlink data into
804 * @size: the size of the buffer
809 static int gfs2_readlink(struct dentry
*dentry
, char __user
*user_buf
,
812 struct gfs2_inode
*ip
= GFS2_I(dentry
->d_inode
);
813 char array
[GFS2_FAST_NAME_SIZE
], *buf
= array
;
814 unsigned int len
= GFS2_FAST_NAME_SIZE
;
817 error
= gfs2_readlinki(ip
, &buf
, &len
);
821 if (user_size
> len
- 1)
824 if (copy_to_user(user_buf
, buf
, user_size
))
836 * gfs2_follow_link - Follow a symbolic link
837 * @dentry: The dentry of the link
838 * @nd: Data that we pass to vfs_follow_link()
840 * This can handle symlinks of any size. It is optimised for symlinks
841 * under GFS2_FAST_NAME_SIZE.
843 * Returns: 0 on success or error code
846 static void *gfs2_follow_link(struct dentry
*dentry
, struct nameidata
*nd
)
848 struct gfs2_inode
*ip
= GFS2_I(dentry
->d_inode
);
849 char array
[GFS2_FAST_NAME_SIZE
], *buf
= array
;
850 unsigned int len
= GFS2_FAST_NAME_SIZE
;
853 error
= gfs2_readlinki(ip
, &buf
, &len
);
855 error
= vfs_follow_link(nd
, buf
);
860 return ERR_PTR(error
);
867 * @nd: passed from Linux VFS, ignored by us
869 * This may be called from the VFS directly, or from within GFS2 with the
870 * inode locked, so we look to see if the glock is already locked and only
871 * lock the glock if its not already been done.
876 static int gfs2_permission(struct inode
*inode
, int mask
, struct nameidata
*nd
)
878 struct gfs2_inode
*ip
= GFS2_I(inode
);
879 struct gfs2_holder i_gh
;
883 if (gfs2_glock_is_locked_by_me(ip
->i_gl
) == 0) {
884 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_SHARED
, LM_FLAG_ANY
, &i_gh
);
890 error
= generic_permission(inode
, mask
, gfs2_check_acl
);
892 gfs2_glock_dq_uninit(&i_gh
);
897 static int setattr_size(struct inode
*inode
, struct iattr
*attr
)
899 struct gfs2_inode
*ip
= GFS2_I(inode
);
902 if (attr
->ia_size
!= ip
->i_di
.di_size
) {
903 error
= vmtruncate(inode
, attr
->ia_size
);
908 error
= gfs2_truncatei(ip
, attr
->ia_size
);
915 static int setattr_chown(struct inode
*inode
, struct iattr
*attr
)
917 struct gfs2_inode
*ip
= GFS2_I(inode
);
918 struct gfs2_sbd
*sdp
= GFS2_SB(inode
);
919 struct buffer_head
*dibh
;
920 u32 ouid
, ogid
, nuid
, ngid
;
928 if (!(attr
->ia_valid
& ATTR_UID
) || ouid
== nuid
)
929 ouid
= nuid
= NO_QUOTA_CHANGE
;
930 if (!(attr
->ia_valid
& ATTR_GID
) || ogid
== ngid
)
931 ogid
= ngid
= NO_QUOTA_CHANGE
;
935 error
= gfs2_quota_lock(ip
, nuid
, ngid
);
939 if (ouid
!= NO_QUOTA_CHANGE
|| ogid
!= NO_QUOTA_CHANGE
) {
940 error
= gfs2_quota_check(ip
, nuid
, ngid
);
945 error
= gfs2_trans_begin(sdp
, RES_DINODE
+ 2 * RES_QUOTA
, 0);
949 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
953 error
= inode_setattr(inode
, attr
);
954 gfs2_assert_warn(sdp
, !error
);
956 gfs2_trans_add_bh(ip
->i_gl
, dibh
, 1);
957 gfs2_dinode_out(ip
, dibh
->b_data
);
960 if (ouid
!= NO_QUOTA_CHANGE
|| ogid
!= NO_QUOTA_CHANGE
) {
961 gfs2_quota_change(ip
, -ip
->i_di
.di_blocks
, ouid
, ogid
);
962 gfs2_quota_change(ip
, ip
->i_di
.di_blocks
, nuid
, ngid
);
968 gfs2_quota_unlock(ip
);
975 * gfs2_setattr - Change attributes on an inode
976 * @dentry: The dentry which is changing
977 * @attr: The structure describing the change
979 * The VFS layer wants to change one or more of an inodes attributes. Write
980 * that change out to disk.
985 static int gfs2_setattr(struct dentry
*dentry
, struct iattr
*attr
)
987 struct inode
*inode
= dentry
->d_inode
;
988 struct gfs2_inode
*ip
= GFS2_I(inode
);
989 struct gfs2_holder i_gh
;
992 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, &i_gh
);
997 if (IS_IMMUTABLE(inode
) || IS_APPEND(inode
))
1000 error
= inode_change_ok(inode
, attr
);
1004 if (attr
->ia_valid
& ATTR_SIZE
)
1005 error
= setattr_size(inode
, attr
);
1006 else if (attr
->ia_valid
& (ATTR_UID
| ATTR_GID
))
1007 error
= setattr_chown(inode
, attr
);
1008 else if ((attr
->ia_valid
& ATTR_MODE
) && IS_POSIXACL(inode
))
1009 error
= gfs2_acl_chmod(ip
, attr
);
1011 error
= gfs2_setattr_simple(ip
, attr
);
1014 gfs2_glock_dq_uninit(&i_gh
);
1016 mark_inode_dirty(inode
);
1021 * gfs2_getattr - Read out an inode's attributes
1022 * @mnt: The vfsmount the inode is being accessed from
1023 * @dentry: The dentry to stat
1024 * @stat: The inode's stats
1026 * This may be called from the VFS directly, or from within GFS2 with the
1027 * inode locked, so we look to see if the glock is already locked and only
1028 * lock the glock if its not already been done. Note that its the NFS
1029 * readdirplus operation which causes this to be called (from filldir)
1030 * with the glock already held.
1035 static int gfs2_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
,
1038 struct inode
*inode
= dentry
->d_inode
;
1039 struct gfs2_inode
*ip
= GFS2_I(inode
);
1040 struct gfs2_holder gh
;
1044 if (gfs2_glock_is_locked_by_me(ip
->i_gl
) == 0) {
1045 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_SHARED
, LM_FLAG_ANY
, &gh
);
1051 generic_fillattr(inode
, stat
);
1053 gfs2_glock_dq_uninit(&gh
);
1058 static int gfs2_setxattr(struct dentry
*dentry
, const char *name
,
1059 const void *data
, size_t size
, int flags
)
1061 struct inode
*inode
= dentry
->d_inode
;
1062 struct gfs2_ea_request er
;
1064 memset(&er
, 0, sizeof(struct gfs2_ea_request
));
1065 er
.er_type
= gfs2_ea_name2type(name
, &er
.er_name
);
1066 if (er
.er_type
== GFS2_EATYPE_UNUSED
)
1068 er
.er_data
= (char *)data
;
1069 er
.er_name_len
= strlen(er
.er_name
);
1070 er
.er_data_len
= size
;
1071 er
.er_flags
= flags
;
1073 gfs2_assert_warn(GFS2_SB(inode
), !(er
.er_flags
& GFS2_ERF_MODE
));
1075 return gfs2_ea_set(GFS2_I(inode
), &er
);
1078 static ssize_t
gfs2_getxattr(struct dentry
*dentry
, const char *name
,
1079 void *data
, size_t size
)
1081 struct gfs2_ea_request er
;
1083 memset(&er
, 0, sizeof(struct gfs2_ea_request
));
1084 er
.er_type
= gfs2_ea_name2type(name
, &er
.er_name
);
1085 if (er
.er_type
== GFS2_EATYPE_UNUSED
)
1088 er
.er_name_len
= strlen(er
.er_name
);
1089 er
.er_data_len
= size
;
1091 return gfs2_ea_get(GFS2_I(dentry
->d_inode
), &er
);
1094 static ssize_t
gfs2_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
)
1096 struct gfs2_ea_request er
;
1098 memset(&er
, 0, sizeof(struct gfs2_ea_request
));
1099 er
.er_data
= (size
) ? buffer
: NULL
;
1100 er
.er_data_len
= size
;
1102 return gfs2_ea_list(GFS2_I(dentry
->d_inode
), &er
);
1105 static int gfs2_removexattr(struct dentry
*dentry
, const char *name
)
1107 struct gfs2_ea_request er
;
1109 memset(&er
, 0, sizeof(struct gfs2_ea_request
));
1110 er
.er_type
= gfs2_ea_name2type(name
, &er
.er_name
);
1111 if (er
.er_type
== GFS2_EATYPE_UNUSED
)
1113 er
.er_name_len
= strlen(er
.er_name
);
1115 return gfs2_ea_remove(GFS2_I(dentry
->d_inode
), &er
);
1118 struct inode_operations gfs2_file_iops
= {
1119 .permission
= gfs2_permission
,
1120 .setattr
= gfs2_setattr
,
1121 .getattr
= gfs2_getattr
,
1122 .setxattr
= gfs2_setxattr
,
1123 .getxattr
= gfs2_getxattr
,
1124 .listxattr
= gfs2_listxattr
,
1125 .removexattr
= gfs2_removexattr
,
1128 struct inode_operations gfs2_dev_iops
= {
1129 .permission
= gfs2_permission
,
1130 .setattr
= gfs2_setattr
,
1131 .getattr
= gfs2_getattr
,
1132 .setxattr
= gfs2_setxattr
,
1133 .getxattr
= gfs2_getxattr
,
1134 .listxattr
= gfs2_listxattr
,
1135 .removexattr
= gfs2_removexattr
,
1138 struct inode_operations gfs2_dir_iops
= {
1139 .create
= gfs2_create
,
1140 .lookup
= gfs2_lookup
,
1142 .unlink
= gfs2_unlink
,
1143 .symlink
= gfs2_symlink
,
1144 .mkdir
= gfs2_mkdir
,
1145 .rmdir
= gfs2_rmdir
,
1146 .mknod
= gfs2_mknod
,
1147 .rename
= gfs2_rename
,
1148 .permission
= gfs2_permission
,
1149 .setattr
= gfs2_setattr
,
1150 .getattr
= gfs2_getattr
,
1151 .setxattr
= gfs2_setxattr
,
1152 .getxattr
= gfs2_getxattr
,
1153 .listxattr
= gfs2_listxattr
,
1154 .removexattr
= gfs2_removexattr
,
1157 struct inode_operations gfs2_symlink_iops
= {
1158 .readlink
= gfs2_readlink
,
1159 .follow_link
= gfs2_follow_link
,
1160 .permission
= gfs2_permission
,
1161 .setattr
= gfs2_setattr
,
1162 .getattr
= gfs2_getattr
,
1163 .setxattr
= gfs2_setxattr
,
1164 .getxattr
= gfs2_getxattr
,
1165 .listxattr
= gfs2_listxattr
,
1166 .removexattr
= gfs2_removexattr
,