2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2005 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 v.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/xattr.h>
16 #include <linux/gfs2_ondisk.h>
17 #include <asm/uaccess.h>
20 #include "lm_interface.h"
34 * ea_calc_size - returns the acutal number of bytes the request will take up
35 * (not counting any unstuffed data blocks)
40 * Returns: 1 if the EA should be stuffed
43 static int ea_calc_size(struct gfs2_sbd
*sdp
, struct gfs2_ea_request
*er
,
46 *size
= GFS2_EAREQ_SIZE_STUFFED(er
);
47 if (*size
<= sdp
->sd_jbsize
)
50 *size
= GFS2_EAREQ_SIZE_UNSTUFFED(sdp
, er
);
55 static int ea_check_size(struct gfs2_sbd
*sdp
, struct gfs2_ea_request
*er
)
59 if (er
->er_data_len
> GFS2_EA_MAX_DATA_LEN
)
62 ea_calc_size(sdp
, er
, &size
);
64 /* This can only happen with 512 byte blocks */
65 if (size
> sdp
->sd_jbsize
)
71 typedef int (*ea_call_t
) (struct gfs2_inode
*ip
,
72 struct buffer_head
*bh
,
73 struct gfs2_ea_header
*ea
,
74 struct gfs2_ea_header
*prev
,
77 static int ea_foreach_i(struct gfs2_inode
*ip
, struct buffer_head
*bh
,
78 ea_call_t ea_call
, void *data
)
80 struct gfs2_ea_header
*ea
, *prev
= NULL
;
83 if (gfs2_metatype_check(ip
->i_sbd
, bh
, GFS2_METATYPE_EA
))
86 for (ea
= GFS2_EA_BH2FIRST(bh
);; prev
= ea
, ea
= GFS2_EA2NEXT(ea
)) {
87 if (!GFS2_EA_REC_LEN(ea
))
89 if (!(bh
->b_data
<= (char *)ea
&&
90 (char *)GFS2_EA2NEXT(ea
) <=
91 bh
->b_data
+ bh
->b_size
))
93 if (!GFS2_EATYPE_VALID(ea
->ea_type
))
96 error
= ea_call(ip
, bh
, ea
, prev
, data
);
100 if (GFS2_EA_IS_LAST(ea
)) {
101 if ((char *)GFS2_EA2NEXT(ea
) !=
102 bh
->b_data
+ bh
->b_size
)
111 gfs2_consist_inode(ip
);
115 static int ea_foreach(struct gfs2_inode
*ip
, ea_call_t ea_call
, void *data
)
117 struct buffer_head
*bh
, *eabh
;
118 uint64_t *eablk
, *end
;
121 error
= gfs2_meta_read(ip
->i_gl
, ip
->i_di
.di_eattr
,
122 DIO_START
| DIO_WAIT
, &bh
);
126 if (!(ip
->i_di
.di_flags
& GFS2_DIF_EA_INDIRECT
)) {
127 error
= ea_foreach_i(ip
, bh
, ea_call
, data
);
131 if (gfs2_metatype_check(ip
->i_sbd
, bh
, GFS2_METATYPE_IN
)) {
136 eablk
= (uint64_t *)(bh
->b_data
+ sizeof(struct gfs2_meta_header
));
137 end
= eablk
+ ip
->i_sbd
->sd_inptrs
;
139 for (; eablk
< end
; eablk
++) {
144 bn
= be64_to_cpu(*eablk
);
146 error
= gfs2_meta_read(ip
->i_gl
, bn
, DIO_START
| DIO_WAIT
,
150 error
= ea_foreach_i(ip
, eabh
, ea_call
, data
);
162 struct gfs2_ea_request
*ef_er
;
163 struct gfs2_ea_location
*ef_el
;
166 static int ea_find_i(struct gfs2_inode
*ip
, struct buffer_head
*bh
,
167 struct gfs2_ea_header
*ea
, struct gfs2_ea_header
*prev
,
170 struct ea_find
*ef
= private;
171 struct gfs2_ea_request
*er
= ef
->ef_er
;
173 if (ea
->ea_type
== GFS2_EATYPE_UNUSED
)
176 if (ea
->ea_type
== er
->er_type
) {
177 if (ea
->ea_name_len
== er
->er_name_len
&&
178 !memcmp(GFS2_EA2NAME(ea
), er
->er_name
, ea
->ea_name_len
)) {
179 struct gfs2_ea_location
*el
= ef
->ef_el
;
189 else if ((ip
->i_di
.di_flags
& GFS2_DIF_EA_PACKED
) &&
190 er
->er_type
== GFS2_EATYPE_SYS
)
197 int gfs2_ea_find(struct gfs2_inode
*ip
, struct gfs2_ea_request
*er
,
198 struct gfs2_ea_location
*el
)
206 memset(el
, 0, sizeof(struct gfs2_ea_location
));
208 error
= ea_foreach(ip
, ea_find_i
, &ef
);
216 * ea_dealloc_unstuffed -
223 * Take advantage of the fact that all unstuffed blocks are
224 * allocated from the same RG. But watch, this may not always
230 static int ea_dealloc_unstuffed(struct gfs2_inode
*ip
, struct buffer_head
*bh
,
231 struct gfs2_ea_header
*ea
,
232 struct gfs2_ea_header
*prev
, void *private)
234 int *leave
= private;
235 struct gfs2_sbd
*sdp
= ip
->i_sbd
;
236 struct gfs2_rgrpd
*rgd
;
237 struct gfs2_holder rg_gh
;
238 struct buffer_head
*dibh
;
239 uint64_t *dataptrs
, bn
= 0;
241 unsigned int blen
= 0;
242 unsigned int blks
= 0;
246 if (GFS2_EA_IS_STUFFED(ea
))
249 dataptrs
= GFS2_EA2DATAPTRS(ea
);
250 for (x
= 0; x
< ea
->ea_num_ptrs
; x
++, dataptrs
++)
253 bn
= be64_to_cpu(*dataptrs
);
258 rgd
= gfs2_blk2rgrpd(sdp
, bn
);
260 gfs2_consist_inode(ip
);
264 error
= gfs2_glock_nq_init(rgd
->rd_gl
, LM_ST_EXCLUSIVE
, 0, &rg_gh
);
268 error
= gfs2_trans_begin(sdp
, rgd
->rd_ri
.ri_length
+
269 RES_DINODE
+ RES_EATTR
+ RES_STATFS
+
274 gfs2_trans_add_bh(ip
->i_gl
, bh
, 1);
276 dataptrs
= GFS2_EA2DATAPTRS(ea
);
277 for (x
= 0; x
< ea
->ea_num_ptrs
; x
++, dataptrs
++) {
280 bn
= be64_to_cpu(*dataptrs
);
282 if (bstart
+ blen
== bn
)
286 gfs2_free_meta(ip
, bstart
, blen
);
292 if (!ip
->i_di
.di_blocks
)
293 gfs2_consist_inode(ip
);
294 ip
->i_di
.di_blocks
--;
297 gfs2_free_meta(ip
, bstart
, blen
);
299 if (prev
&& !leave
) {
302 len
= GFS2_EA_REC_LEN(prev
) + GFS2_EA_REC_LEN(ea
);
303 prev
->ea_rec_len
= cpu_to_be32(len
);
305 if (GFS2_EA_IS_LAST(ea
))
306 prev
->ea_flags
|= GFS2_EAFLAG_LAST
;
308 ea
->ea_type
= GFS2_EATYPE_UNUSED
;
312 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
314 ip
->i_di
.di_ctime
= get_seconds();
315 gfs2_trans_add_bh(ip
->i_gl
, dibh
, 1);
316 gfs2_dinode_out(&ip
->i_di
, dibh
->b_data
);
323 gfs2_glock_dq_uninit(&rg_gh
);
328 static int ea_remove_unstuffed(struct gfs2_inode
*ip
, struct buffer_head
*bh
,
329 struct gfs2_ea_header
*ea
,
330 struct gfs2_ea_header
*prev
, int leave
)
332 struct gfs2_alloc
*al
;
335 al
= gfs2_alloc_get(ip
);
337 error
= gfs2_quota_hold(ip
, NO_QUOTA_CHANGE
, NO_QUOTA_CHANGE
);
341 error
= gfs2_rindex_hold(ip
->i_sbd
, &al
->al_ri_gh
);
345 error
= ea_dealloc_unstuffed(ip
,
347 (leave
) ? &error
: NULL
);
349 gfs2_glock_dq_uninit(&al
->al_ri_gh
);
352 gfs2_quota_unhold(ip
);
361 struct gfs2_ea_request
*ei_er
;
362 unsigned int ei_size
;
365 static int ea_list_i(struct gfs2_inode
*ip
, struct buffer_head
*bh
,
366 struct gfs2_ea_header
*ea
, struct gfs2_ea_header
*prev
,
369 struct ea_list
*ei
= private;
370 struct gfs2_ea_request
*er
= ei
->ei_er
;
371 unsigned int ea_size
= GFS2_EA_STRLEN(ea
);
373 if (ea
->ea_type
== GFS2_EATYPE_UNUSED
)
376 if (er
->er_data_len
) {
381 if (ei
->ei_size
+ ea_size
> er
->er_data_len
)
384 if (ea
->ea_type
== GFS2_EATYPE_USR
) {
392 memcpy(er
->er_data
+ ei
->ei_size
,
394 memcpy(er
->er_data
+ ei
->ei_size
+ l
,
397 memcpy(er
->er_data
+ ei
->ei_size
+
402 ei
->ei_size
+= ea_size
;
412 * Returns: actual size of data on success, -errno on error
415 int gfs2_ea_list(struct gfs2_inode
*ip
, struct gfs2_ea_request
*er
)
417 struct gfs2_holder i_gh
;
420 if (!er
->er_data
|| !er
->er_data_len
) {
425 error
= gfs2_glock_nq_init(ip
->i_gl
,
426 LM_ST_SHARED
, LM_FLAG_ANY
,
431 if (ip
->i_di
.di_eattr
) {
432 struct ea_list ei
= { .ei_er
= er
, .ei_size
= 0 };
434 error
= ea_foreach(ip
, ea_list_i
, &ei
);
439 gfs2_glock_dq_uninit(&i_gh
);
445 * ea_get_unstuffed - actually copies the unstuffed data into the
454 static int ea_get_unstuffed(struct gfs2_inode
*ip
, struct gfs2_ea_header
*ea
,
457 struct gfs2_sbd
*sdp
= ip
->i_sbd
;
458 struct buffer_head
**bh
;
459 unsigned int amount
= GFS2_EA_DATA_LEN(ea
);
460 unsigned int nptrs
= DIV_ROUND_UP(amount
, sdp
->sd_jbsize
);
461 uint64_t *dataptrs
= GFS2_EA2DATAPTRS(ea
);
465 bh
= kcalloc(nptrs
, sizeof(struct buffer_head
*), GFP_KERNEL
);
469 for (x
= 0; x
< nptrs
; x
++) {
470 error
= gfs2_meta_read(ip
->i_gl
, be64_to_cpu(*dataptrs
),
480 for (x
= 0; x
< nptrs
; x
++) {
481 error
= gfs2_meta_reread(sdp
, bh
[x
], DIO_WAIT
);
483 for (; x
< nptrs
; x
++)
487 if (gfs2_metatype_check(sdp
, bh
[x
], GFS2_METATYPE_ED
)) {
488 for (; x
< nptrs
; x
++)
495 bh
[x
]->b_data
+ sizeof(struct gfs2_meta_header
),
496 (sdp
->sd_jbsize
> amount
) ? amount
: sdp
->sd_jbsize
);
498 amount
-= sdp
->sd_jbsize
;
499 data
+= sdp
->sd_jbsize
;
510 int gfs2_ea_get_copy(struct gfs2_inode
*ip
, struct gfs2_ea_location
*el
,
513 if (GFS2_EA_IS_STUFFED(el
->el_ea
)) {
515 GFS2_EA2DATA(el
->el_ea
),
516 GFS2_EA_DATA_LEN(el
->el_ea
));
519 return ea_get_unstuffed(ip
, el
->el_ea
, data
);
527 * Returns: actual size of data on success, -errno on error
530 int gfs2_ea_get_i(struct gfs2_inode
*ip
, struct gfs2_ea_request
*er
)
532 struct gfs2_ea_location el
;
535 if (!ip
->i_di
.di_eattr
)
538 error
= gfs2_ea_find(ip
, er
, &el
);
544 if (er
->er_data_len
) {
545 if (GFS2_EA_DATA_LEN(el
.el_ea
) > er
->er_data_len
)
548 error
= gfs2_ea_get_copy(ip
, &el
, er
->er_data
);
551 error
= GFS2_EA_DATA_LEN(el
.el_ea
);
563 * Returns: actual size of data on success, -errno on error
566 int gfs2_ea_get(struct gfs2_inode
*ip
, struct gfs2_ea_request
*er
)
568 struct gfs2_holder i_gh
;
571 if (!er
->er_name_len
||
572 er
->er_name_len
> GFS2_EA_MAX_NAME_LEN
)
574 if (!er
->er_data
|| !er
->er_data_len
) {
579 error
= gfs2_glock_nq_init(ip
->i_gl
,
580 LM_ST_SHARED
, LM_FLAG_ANY
,
585 error
= gfs2_ea_ops
[er
->er_type
]->eo_get(ip
, er
);
587 gfs2_glock_dq_uninit(&i_gh
);
593 * ea_alloc_blk - allocates a new block for extended attributes.
594 * @ip: A pointer to the inode that's getting extended attributes
600 static int ea_alloc_blk(struct gfs2_inode
*ip
, struct buffer_head
**bhp
)
602 struct gfs2_sbd
*sdp
= ip
->i_sbd
;
603 struct gfs2_ea_header
*ea
;
606 block
= gfs2_alloc_meta(ip
);
608 *bhp
= gfs2_meta_new(ip
->i_gl
, block
);
609 gfs2_trans_add_bh(ip
->i_gl
, *bhp
, 1);
610 gfs2_metatype_set(*bhp
, GFS2_METATYPE_EA
, GFS2_FORMAT_EA
);
611 gfs2_buffer_clear_tail(*bhp
, sizeof(struct gfs2_meta_header
));
613 ea
= GFS2_EA_BH2FIRST(*bhp
);
614 ea
->ea_rec_len
= cpu_to_be32(sdp
->sd_jbsize
);
615 ea
->ea_type
= GFS2_EATYPE_UNUSED
;
616 ea
->ea_flags
= GFS2_EAFLAG_LAST
;
619 ip
->i_di
.di_blocks
++;
625 * ea_write - writes the request info to an ea, creating new blocks if
627 * @ip: inode that is being modified
628 * @ea: the location of the new ea in a block
629 * @er: the write request
631 * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags
636 static int ea_write(struct gfs2_inode
*ip
, struct gfs2_ea_header
*ea
,
637 struct gfs2_ea_request
*er
)
639 struct gfs2_sbd
*sdp
= ip
->i_sbd
;
641 ea
->ea_data_len
= cpu_to_be32(er
->er_data_len
);
642 ea
->ea_name_len
= er
->er_name_len
;
643 ea
->ea_type
= er
->er_type
;
646 memcpy(GFS2_EA2NAME(ea
), er
->er_name
, er
->er_name_len
);
648 if (GFS2_EAREQ_SIZE_STUFFED(er
) <= sdp
->sd_jbsize
) {
650 memcpy(GFS2_EA2DATA(ea
), er
->er_data
, er
->er_data_len
);
652 uint64_t *dataptr
= GFS2_EA2DATAPTRS(ea
);
653 const char *data
= er
->er_data
;
654 unsigned int data_len
= er
->er_data_len
;
658 ea
->ea_num_ptrs
= DIV_ROUND_UP(er
->er_data_len
, sdp
->sd_jbsize
);
659 for (x
= 0; x
< ea
->ea_num_ptrs
; x
++) {
660 struct buffer_head
*bh
;
662 int mh_size
= sizeof(struct gfs2_meta_header
);
664 block
= gfs2_alloc_meta(ip
);
666 bh
= gfs2_meta_new(ip
->i_gl
, block
);
667 gfs2_trans_add_bh(ip
->i_gl
, bh
, 1);
668 gfs2_metatype_set(bh
, GFS2_METATYPE_ED
, GFS2_FORMAT_ED
);
670 ip
->i_di
.di_blocks
++;
672 copy
= (data_len
> sdp
->sd_jbsize
) ? sdp
->sd_jbsize
:
674 memcpy(bh
->b_data
+ mh_size
, data
, copy
);
675 if (copy
< sdp
->sd_jbsize
)
676 memset(bh
->b_data
+ mh_size
+ copy
, 0,
677 sdp
->sd_jbsize
- copy
);
679 *dataptr
++ = cpu_to_be64((uint64_t)bh
->b_blocknr
);
686 gfs2_assert_withdraw(sdp
, !data_len
);
692 typedef int (*ea_skeleton_call_t
) (struct gfs2_inode
*ip
,
693 struct gfs2_ea_request
*er
,
696 static int ea_alloc_skeleton(struct gfs2_inode
*ip
, struct gfs2_ea_request
*er
,
698 ea_skeleton_call_t skeleton_call
,
701 struct gfs2_alloc
*al
;
702 struct buffer_head
*dibh
;
705 al
= gfs2_alloc_get(ip
);
707 error
= gfs2_quota_lock(ip
, NO_QUOTA_CHANGE
, NO_QUOTA_CHANGE
);
711 error
= gfs2_quota_check(ip
, ip
->i_di
.di_uid
, ip
->i_di
.di_gid
);
715 al
->al_requested
= blks
;
717 error
= gfs2_inplace_reserve(ip
);
721 error
= gfs2_trans_begin(ip
->i_sbd
,
722 blks
+ al
->al_rgd
->rd_ri
.ri_length
+
723 RES_DINODE
+ RES_STATFS
+ RES_QUOTA
, 0);
727 error
= skeleton_call(ip
, er
, private);
731 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
733 if (er
->er_flags
& GFS2_ERF_MODE
) {
734 gfs2_assert_withdraw(ip
->i_sbd
,
735 (ip
->i_di
.di_mode
& S_IFMT
) ==
736 (er
->er_mode
& S_IFMT
));
737 ip
->i_di
.di_mode
= er
->er_mode
;
739 ip
->i_di
.di_ctime
= get_seconds();
740 gfs2_trans_add_bh(ip
->i_gl
, dibh
, 1);
741 gfs2_dinode_out(&ip
->i_di
, dibh
->b_data
);
746 gfs2_trans_end(ip
->i_sbd
);
749 gfs2_inplace_release(ip
);
752 gfs2_quota_unlock(ip
);
760 static int ea_init_i(struct gfs2_inode
*ip
, struct gfs2_ea_request
*er
,
763 struct buffer_head
*bh
;
766 error
= ea_alloc_blk(ip
, &bh
);
770 ip
->i_di
.di_eattr
= bh
->b_blocknr
;
771 error
= ea_write(ip
, GFS2_EA_BH2FIRST(bh
), er
);
779 * ea_init - initializes a new eattr block
786 static int ea_init(struct gfs2_inode
*ip
, struct gfs2_ea_request
*er
)
788 unsigned int jbsize
= ip
->i_sbd
->sd_jbsize
;
789 unsigned int blks
= 1;
791 if (GFS2_EAREQ_SIZE_STUFFED(er
) > jbsize
)
792 blks
+= DIV_ROUND_UP(er
->er_data_len
, jbsize
);
794 return ea_alloc_skeleton(ip
, er
, blks
, ea_init_i
, NULL
);
797 static struct gfs2_ea_header
*ea_split_ea(struct gfs2_ea_header
*ea
)
799 uint32_t ea_size
= GFS2_EA_SIZE(ea
);
800 struct gfs2_ea_header
*new = (struct gfs2_ea_header
*)((char *)ea
+
802 uint32_t new_size
= GFS2_EA_REC_LEN(ea
) - ea_size
;
803 int last
= ea
->ea_flags
& GFS2_EAFLAG_LAST
;
805 ea
->ea_rec_len
= cpu_to_be32(ea_size
);
806 ea
->ea_flags
^= last
;
808 new->ea_rec_len
= cpu_to_be32(new_size
);
809 new->ea_flags
= last
;
814 static void ea_set_remove_stuffed(struct gfs2_inode
*ip
,
815 struct gfs2_ea_location
*el
)
817 struct gfs2_ea_header
*ea
= el
->el_ea
;
818 struct gfs2_ea_header
*prev
= el
->el_prev
;
821 gfs2_trans_add_bh(ip
->i_gl
, el
->el_bh
, 1);
823 if (!prev
|| !GFS2_EA_IS_STUFFED(ea
)) {
824 ea
->ea_type
= GFS2_EATYPE_UNUSED
;
826 } else if (GFS2_EA2NEXT(prev
) != ea
) {
827 prev
= GFS2_EA2NEXT(prev
);
828 gfs2_assert_withdraw(ip
->i_sbd
, GFS2_EA2NEXT(prev
) == ea
);
831 len
= GFS2_EA_REC_LEN(prev
) + GFS2_EA_REC_LEN(ea
);
832 prev
->ea_rec_len
= cpu_to_be32(len
);
834 if (GFS2_EA_IS_LAST(ea
))
835 prev
->ea_flags
|= GFS2_EAFLAG_LAST
;
841 struct gfs2_ea_request
*es_er
;
842 struct gfs2_ea_location
*es_el
;
844 struct buffer_head
*es_bh
;
845 struct gfs2_ea_header
*es_ea
;
848 static int ea_set_simple_noalloc(struct gfs2_inode
*ip
, struct buffer_head
*bh
,
849 struct gfs2_ea_header
*ea
, struct ea_set
*es
)
851 struct gfs2_ea_request
*er
= es
->es_er
;
852 struct buffer_head
*dibh
;
855 error
= gfs2_trans_begin(ip
->i_sbd
, RES_DINODE
+ 2 * RES_EATTR
, 0);
859 gfs2_trans_add_bh(ip
->i_gl
, bh
, 1);
862 ea
= ea_split_ea(ea
);
864 ea_write(ip
, ea
, er
);
867 ea_set_remove_stuffed(ip
, es
->es_el
);
869 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
873 if (er
->er_flags
& GFS2_ERF_MODE
) {
874 gfs2_assert_withdraw(ip
->i_sbd
,
875 (ip
->i_di
.di_mode
& S_IFMT
) == (er
->er_mode
& S_IFMT
));
876 ip
->i_di
.di_mode
= er
->er_mode
;
878 ip
->i_di
.di_ctime
= get_seconds();
879 gfs2_trans_add_bh(ip
->i_gl
, dibh
, 1);
880 gfs2_dinode_out(&ip
->i_di
, dibh
->b_data
);
883 gfs2_trans_end(ip
->i_sbd
);
888 static int ea_set_simple_alloc(struct gfs2_inode
*ip
,
889 struct gfs2_ea_request
*er
, void *private)
891 struct ea_set
*es
= private;
892 struct gfs2_ea_header
*ea
= es
->es_ea
;
895 gfs2_trans_add_bh(ip
->i_gl
, es
->es_bh
, 1);
898 ea
= ea_split_ea(ea
);
900 error
= ea_write(ip
, ea
, er
);
905 ea_set_remove_stuffed(ip
, es
->es_el
);
910 static int ea_set_simple(struct gfs2_inode
*ip
, struct buffer_head
*bh
,
911 struct gfs2_ea_header
*ea
, struct gfs2_ea_header
*prev
,
914 struct ea_set
*es
= private;
919 stuffed
= ea_calc_size(ip
->i_sbd
, es
->es_er
, &size
);
921 if (ea
->ea_type
== GFS2_EATYPE_UNUSED
) {
922 if (GFS2_EA_REC_LEN(ea
) < size
)
924 if (!GFS2_EA_IS_STUFFED(ea
)) {
925 error
= ea_remove_unstuffed(ip
, bh
, ea
, prev
, 1);
930 } else if (GFS2_EA_REC_LEN(ea
) - GFS2_EA_SIZE(ea
) >= size
)
936 error
= ea_set_simple_noalloc(ip
, bh
, ea
, es
);
944 blks
= 2 + DIV_ROUND_UP(es
->es_er
->er_data_len
,
945 ip
->i_sbd
->sd_jbsize
);
947 error
= ea_alloc_skeleton(ip
, es
->es_er
, blks
,
948 ea_set_simple_alloc
, es
);
956 static int ea_set_block(struct gfs2_inode
*ip
, struct gfs2_ea_request
*er
,
959 struct gfs2_sbd
*sdp
= ip
->i_sbd
;
960 struct buffer_head
*indbh
, *newbh
;
963 int mh_size
= sizeof(struct gfs2_meta_header
);
965 if (ip
->i_di
.di_flags
& GFS2_DIF_EA_INDIRECT
) {
968 error
= gfs2_meta_read(ip
->i_gl
, ip
->i_di
.di_eattr
,
969 DIO_START
| DIO_WAIT
, &indbh
);
973 if (gfs2_metatype_check(sdp
, indbh
, GFS2_METATYPE_IN
)) {
978 eablk
= (uint64_t *)(indbh
->b_data
+ mh_size
);
979 end
= eablk
+ sdp
->sd_inptrs
;
981 for (; eablk
< end
; eablk
++)
990 gfs2_trans_add_bh(ip
->i_gl
, indbh
, 1);
994 blk
= gfs2_alloc_meta(ip
);
996 indbh
= gfs2_meta_new(ip
->i_gl
, blk
);
997 gfs2_trans_add_bh(ip
->i_gl
, indbh
, 1);
998 gfs2_metatype_set(indbh
, GFS2_METATYPE_IN
, GFS2_FORMAT_IN
);
999 gfs2_buffer_clear_tail(indbh
, mh_size
);
1001 eablk
= (uint64_t *)(indbh
->b_data
+ mh_size
);
1002 *eablk
= cpu_to_be64(ip
->i_di
.di_eattr
);
1003 ip
->i_di
.di_eattr
= blk
;
1004 ip
->i_di
.di_flags
|= GFS2_DIF_EA_INDIRECT
;
1005 ip
->i_di
.di_blocks
++;
1010 error
= ea_alloc_blk(ip
, &newbh
);
1014 *eablk
= cpu_to_be64((uint64_t)newbh
->b_blocknr
);
1015 error
= ea_write(ip
, GFS2_EA_BH2FIRST(newbh
), er
);
1021 ea_set_remove_stuffed(ip
, (struct gfs2_ea_location
*)private);
1029 static int ea_set_i(struct gfs2_inode
*ip
, struct gfs2_ea_request
*er
,
1030 struct gfs2_ea_location
*el
)
1033 unsigned int blks
= 2;
1036 memset(&es
, 0, sizeof(struct ea_set
));
1040 error
= ea_foreach(ip
, ea_set_simple
, &es
);
1046 if (!(ip
->i_di
.di_flags
& GFS2_DIF_EA_INDIRECT
))
1048 if (GFS2_EAREQ_SIZE_STUFFED(er
) > ip
->i_sbd
->sd_jbsize
)
1049 blks
+= DIV_ROUND_UP(er
->er_data_len
, ip
->i_sbd
->sd_jbsize
);
1051 return ea_alloc_skeleton(ip
, er
, blks
, ea_set_block
, el
);
1054 static int ea_set_remove_unstuffed(struct gfs2_inode
*ip
,
1055 struct gfs2_ea_location
*el
)
1057 if (el
->el_prev
&& GFS2_EA2NEXT(el
->el_prev
) != el
->el_ea
) {
1058 el
->el_prev
= GFS2_EA2NEXT(el
->el_prev
);
1059 gfs2_assert_withdraw(ip
->i_sbd
,
1060 GFS2_EA2NEXT(el
->el_prev
) == el
->el_ea
);
1063 return ea_remove_unstuffed(ip
, el
->el_bh
, el
->el_ea
, el
->el_prev
,0);
1066 int gfs2_ea_set_i(struct gfs2_inode
*ip
, struct gfs2_ea_request
*er
)
1068 struct gfs2_ea_location el
;
1071 if (!ip
->i_di
.di_eattr
) {
1072 if (er
->er_flags
& XATTR_REPLACE
)
1074 return ea_init(ip
, er
);
1077 error
= gfs2_ea_find(ip
, er
, &el
);
1082 if (ip
->i_di
.di_flags
& GFS2_DIF_APPENDONLY
) {
1088 if (!(er
->er_flags
& XATTR_CREATE
)) {
1089 int unstuffed
= !GFS2_EA_IS_STUFFED(el
.el_ea
);
1090 error
= ea_set_i(ip
, er
, &el
);
1091 if (!error
&& unstuffed
)
1092 ea_set_remove_unstuffed(ip
, &el
);
1098 if (!(er
->er_flags
& XATTR_REPLACE
))
1099 error
= ea_set_i(ip
, er
, NULL
);
1105 int gfs2_ea_set(struct gfs2_inode
*ip
, struct gfs2_ea_request
*er
)
1107 struct gfs2_holder i_gh
;
1110 if (!er
->er_name_len
||
1111 er
->er_name_len
> GFS2_EA_MAX_NAME_LEN
)
1113 if (!er
->er_data
|| !er
->er_data_len
) {
1115 er
->er_data_len
= 0;
1117 error
= ea_check_size(ip
->i_sbd
, er
);
1121 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, &i_gh
);
1125 if (IS_IMMUTABLE(ip
->i_vnode
))
1128 error
= gfs2_ea_ops
[er
->er_type
]->eo_set(ip
, er
);
1130 gfs2_glock_dq_uninit(&i_gh
);
1135 static int ea_remove_stuffed(struct gfs2_inode
*ip
, struct gfs2_ea_location
*el
)
1137 struct gfs2_ea_header
*ea
= el
->el_ea
;
1138 struct gfs2_ea_header
*prev
= el
->el_prev
;
1139 struct buffer_head
*dibh
;
1142 error
= gfs2_trans_begin(ip
->i_sbd
, RES_DINODE
+ RES_EATTR
, 0);
1146 gfs2_trans_add_bh(ip
->i_gl
, el
->el_bh
, 1);
1151 len
= GFS2_EA_REC_LEN(prev
) + GFS2_EA_REC_LEN(ea
);
1152 prev
->ea_rec_len
= cpu_to_be32(len
);
1154 if (GFS2_EA_IS_LAST(ea
))
1155 prev
->ea_flags
|= GFS2_EAFLAG_LAST
;
1157 ea
->ea_type
= GFS2_EATYPE_UNUSED
;
1159 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
1161 ip
->i_di
.di_ctime
= get_seconds();
1162 gfs2_trans_add_bh(ip
->i_gl
, dibh
, 1);
1163 gfs2_dinode_out(&ip
->i_di
, dibh
->b_data
);
1167 gfs2_trans_end(ip
->i_sbd
);
1172 int gfs2_ea_remove_i(struct gfs2_inode
*ip
, struct gfs2_ea_request
*er
)
1174 struct gfs2_ea_location el
;
1177 if (!ip
->i_di
.di_eattr
)
1180 error
= gfs2_ea_find(ip
, er
, &el
);
1186 if (GFS2_EA_IS_STUFFED(el
.el_ea
))
1187 error
= ea_remove_stuffed(ip
, &el
);
1189 error
= ea_remove_unstuffed(ip
, el
.el_bh
, el
.el_ea
, el
.el_prev
,
1198 * gfs2_ea_remove - sets (or creates or replaces) an extended attribute
1199 * @ip: pointer to the inode of the target file
1200 * @er: request information
1205 int gfs2_ea_remove(struct gfs2_inode
*ip
, struct gfs2_ea_request
*er
)
1207 struct gfs2_holder i_gh
;
1210 if (!er
->er_name_len
|| er
->er_name_len
> GFS2_EA_MAX_NAME_LEN
)
1213 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, &i_gh
);
1217 if (IS_IMMUTABLE(ip
->i_vnode
) || IS_APPEND(ip
->i_vnode
))
1220 error
= gfs2_ea_ops
[er
->er_type
]->eo_remove(ip
, er
);
1222 gfs2_glock_dq_uninit(&i_gh
);
1227 static int ea_acl_chmod_unstuffed(struct gfs2_inode
*ip
,
1228 struct gfs2_ea_header
*ea
, char *data
)
1230 struct gfs2_sbd
*sdp
= ip
->i_sbd
;
1231 struct buffer_head
**bh
;
1232 unsigned int amount
= GFS2_EA_DATA_LEN(ea
);
1233 unsigned int nptrs
= DIV_ROUND_UP(amount
, sdp
->sd_jbsize
);
1234 uint64_t *dataptrs
= GFS2_EA2DATAPTRS(ea
);
1238 bh
= kcalloc(nptrs
, sizeof(struct buffer_head
*), GFP_KERNEL
);
1242 error
= gfs2_trans_begin(sdp
, nptrs
+ RES_DINODE
, 0);
1246 for (x
= 0; x
< nptrs
; x
++) {
1247 error
= gfs2_meta_read(ip
->i_gl
, be64_to_cpu(*dataptrs
),
1257 for (x
= 0; x
< nptrs
; x
++) {
1258 error
= gfs2_meta_reread(sdp
, bh
[x
], DIO_WAIT
);
1260 for (; x
< nptrs
; x
++)
1264 if (gfs2_metatype_check(sdp
, bh
[x
], GFS2_METATYPE_ED
)) {
1265 for (; x
< nptrs
; x
++)
1271 gfs2_trans_add_bh(ip
->i_gl
, bh
[x
], 1);
1273 memcpy(bh
[x
]->b_data
+ sizeof(struct gfs2_meta_header
),
1275 (sdp
->sd_jbsize
> amount
) ? amount
: sdp
->sd_jbsize
);
1277 amount
-= sdp
->sd_jbsize
;
1278 data
+= sdp
->sd_jbsize
;
1289 gfs2_trans_end(sdp
);
1295 int gfs2_ea_acl_chmod(struct gfs2_inode
*ip
, struct gfs2_ea_location
*el
,
1296 struct iattr
*attr
, char *data
)
1298 struct buffer_head
*dibh
;
1301 if (GFS2_EA_IS_STUFFED(el
->el_ea
)) {
1302 error
= gfs2_trans_begin(ip
->i_sbd
, RES_DINODE
+ RES_EATTR
, 0);
1306 gfs2_trans_add_bh(ip
->i_gl
, el
->el_bh
, 1);
1307 memcpy(GFS2_EA2DATA(el
->el_ea
),
1309 GFS2_EA_DATA_LEN(el
->el_ea
));
1311 error
= ea_acl_chmod_unstuffed(ip
, el
->el_ea
, data
);
1316 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
1318 error
= inode_setattr(ip
->i_vnode
, attr
);
1319 gfs2_assert_warn(ip
->i_sbd
, !error
);
1320 gfs2_inode_attr_out(ip
);
1321 gfs2_trans_add_bh(ip
->i_gl
, dibh
, 1);
1322 gfs2_dinode_out(&ip
->i_di
, dibh
->b_data
);
1326 gfs2_trans_end(ip
->i_sbd
);
1331 static int ea_dealloc_indirect(struct gfs2_inode
*ip
)
1333 struct gfs2_sbd
*sdp
= ip
->i_sbd
;
1334 struct gfs2_rgrp_list rlist
;
1335 struct buffer_head
*indbh
, *dibh
;
1336 uint64_t *eablk
, *end
;
1337 unsigned int rg_blocks
= 0;
1338 uint64_t bstart
= 0;
1339 unsigned int blen
= 0;
1340 unsigned int blks
= 0;
1344 memset(&rlist
, 0, sizeof(struct gfs2_rgrp_list
));
1346 error
= gfs2_meta_read(ip
->i_gl
, ip
->i_di
.di_eattr
,
1347 DIO_START
| DIO_WAIT
, &indbh
);
1351 if (gfs2_metatype_check(sdp
, indbh
, GFS2_METATYPE_IN
)) {
1356 eablk
= (uint64_t *)(indbh
->b_data
+ sizeof(struct gfs2_meta_header
));
1357 end
= eablk
+ sdp
->sd_inptrs
;
1359 for (; eablk
< end
; eablk
++) {
1364 bn
= be64_to_cpu(*eablk
);
1366 if (bstart
+ blen
== bn
)
1370 gfs2_rlist_add(sdp
, &rlist
, bstart
);
1377 gfs2_rlist_add(sdp
, &rlist
, bstart
);
1381 gfs2_rlist_alloc(&rlist
, LM_ST_EXCLUSIVE
, 0);
1383 for (x
= 0; x
< rlist
.rl_rgrps
; x
++) {
1384 struct gfs2_rgrpd
*rgd
;
1385 rgd
= rlist
.rl_ghs
[x
].gh_gl
->gl_object
;
1386 rg_blocks
+= rgd
->rd_ri
.ri_length
;
1389 error
= gfs2_glock_nq_m(rlist
.rl_rgrps
, rlist
.rl_ghs
);
1391 goto out_rlist_free
;
1393 error
= gfs2_trans_begin(sdp
, rg_blocks
+ RES_DINODE
+
1394 RES_INDIRECT
+ RES_STATFS
+
1399 gfs2_trans_add_bh(ip
->i_gl
, indbh
, 1);
1401 eablk
= (uint64_t *)(indbh
->b_data
+ sizeof(struct gfs2_meta_header
));
1405 for (; eablk
< end
; eablk
++) {
1410 bn
= be64_to_cpu(*eablk
);
1412 if (bstart
+ blen
== bn
)
1416 gfs2_free_meta(ip
, bstart
, blen
);
1422 if (!ip
->i_di
.di_blocks
)
1423 gfs2_consist_inode(ip
);
1424 ip
->i_di
.di_blocks
--;
1427 gfs2_free_meta(ip
, bstart
, blen
);
1429 ip
->i_di
.di_flags
&= ~GFS2_DIF_EA_INDIRECT
;
1431 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
1433 gfs2_trans_add_bh(ip
->i_gl
, dibh
, 1);
1434 gfs2_dinode_out(&ip
->i_di
, dibh
->b_data
);
1438 gfs2_trans_end(sdp
);
1441 gfs2_glock_dq_m(rlist
.rl_rgrps
, rlist
.rl_ghs
);
1444 gfs2_rlist_free(&rlist
);
1452 static int ea_dealloc_block(struct gfs2_inode
*ip
)
1454 struct gfs2_sbd
*sdp
= ip
->i_sbd
;
1455 struct gfs2_alloc
*al
= &ip
->i_alloc
;
1456 struct gfs2_rgrpd
*rgd
;
1457 struct buffer_head
*dibh
;
1460 rgd
= gfs2_blk2rgrpd(sdp
, ip
->i_di
.di_eattr
);
1462 gfs2_consist_inode(ip
);
1466 error
= gfs2_glock_nq_init(rgd
->rd_gl
, LM_ST_EXCLUSIVE
, 0,
1471 error
= gfs2_trans_begin(sdp
, RES_RG_BIT
+ RES_DINODE
+
1472 RES_STATFS
+ RES_QUOTA
, 1);
1476 gfs2_free_meta(ip
, ip
->i_di
.di_eattr
, 1);
1478 ip
->i_di
.di_eattr
= 0;
1479 if (!ip
->i_di
.di_blocks
)
1480 gfs2_consist_inode(ip
);
1481 ip
->i_di
.di_blocks
--;
1483 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
1485 gfs2_trans_add_bh(ip
->i_gl
, dibh
, 1);
1486 gfs2_dinode_out(&ip
->i_di
, dibh
->b_data
);
1490 gfs2_trans_end(sdp
);
1493 gfs2_glock_dq_uninit(&al
->al_rgd_gh
);
1499 * gfs2_ea_dealloc - deallocate the extended attribute fork
1505 int gfs2_ea_dealloc(struct gfs2_inode
*ip
)
1507 struct gfs2_alloc
*al
;
1510 al
= gfs2_alloc_get(ip
);
1512 error
= gfs2_quota_hold(ip
, NO_QUOTA_CHANGE
, NO_QUOTA_CHANGE
);
1516 error
= gfs2_rindex_hold(ip
->i_sbd
, &al
->al_ri_gh
);
1520 error
= ea_foreach(ip
, ea_dealloc_unstuffed
, NULL
);
1524 if (ip
->i_di
.di_flags
& GFS2_DIF_EA_INDIRECT
) {
1525 error
= ea_dealloc_indirect(ip
);
1530 error
= ea_dealloc_block(ip
);
1533 gfs2_glock_dq_uninit(&al
->al_ri_gh
);
1536 gfs2_quota_unhold(ip
);