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 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 switch (ea
->ea_type
) {
385 case GFS2_EATYPE_USR
:
389 case GFS2_EATYPE_SYS
:
393 case GFS2_EATYPE_SECURITY
:
394 prefix
= "security.";
398 /* FIXME: Needs looking at again */
402 memcpy(er
->er_data
+ ei
->ei_size
, prefix
, l
);
403 memcpy(er
->er_data
+ ei
->ei_size
+ l
, GFS2_EA2NAME(ea
),
405 memcpy(er
->er_data
+ ei
->ei_size
+ ea_size
- 1, &c
, 1);
408 ei
->ei_size
+= ea_size
;
418 * Returns: actual size of data on success, -errno on error
421 int gfs2_ea_list(struct gfs2_inode
*ip
, struct gfs2_ea_request
*er
)
423 struct gfs2_holder i_gh
;
426 if (!er
->er_data
|| !er
->er_data_len
) {
431 error
= gfs2_glock_nq_init(ip
->i_gl
,
432 LM_ST_SHARED
, LM_FLAG_ANY
,
437 if (ip
->i_di
.di_eattr
) {
438 struct ea_list ei
= { .ei_er
= er
, .ei_size
= 0 };
440 error
= ea_foreach(ip
, ea_list_i
, &ei
);
445 gfs2_glock_dq_uninit(&i_gh
);
451 * ea_get_unstuffed - actually copies the unstuffed data into the
460 static int ea_get_unstuffed(struct gfs2_inode
*ip
, struct gfs2_ea_header
*ea
,
463 struct gfs2_sbd
*sdp
= ip
->i_sbd
;
464 struct buffer_head
**bh
;
465 unsigned int amount
= GFS2_EA_DATA_LEN(ea
);
466 unsigned int nptrs
= DIV_ROUND_UP(amount
, sdp
->sd_jbsize
);
467 uint64_t *dataptrs
= GFS2_EA2DATAPTRS(ea
);
471 bh
= kcalloc(nptrs
, sizeof(struct buffer_head
*), GFP_KERNEL
);
475 for (x
= 0; x
< nptrs
; x
++) {
476 error
= gfs2_meta_read(ip
->i_gl
, be64_to_cpu(*dataptrs
),
486 for (x
= 0; x
< nptrs
; x
++) {
487 error
= gfs2_meta_reread(sdp
, bh
[x
], DIO_WAIT
);
489 for (; x
< nptrs
; x
++)
493 if (gfs2_metatype_check(sdp
, bh
[x
], GFS2_METATYPE_ED
)) {
494 for (; x
< nptrs
; x
++)
501 bh
[x
]->b_data
+ sizeof(struct gfs2_meta_header
),
502 (sdp
->sd_jbsize
> amount
) ? amount
: sdp
->sd_jbsize
);
504 amount
-= sdp
->sd_jbsize
;
505 data
+= sdp
->sd_jbsize
;
516 int gfs2_ea_get_copy(struct gfs2_inode
*ip
, struct gfs2_ea_location
*el
,
519 if (GFS2_EA_IS_STUFFED(el
->el_ea
)) {
521 GFS2_EA2DATA(el
->el_ea
),
522 GFS2_EA_DATA_LEN(el
->el_ea
));
525 return ea_get_unstuffed(ip
, el
->el_ea
, data
);
533 * Returns: actual size of data on success, -errno on error
536 int gfs2_ea_get_i(struct gfs2_inode
*ip
, struct gfs2_ea_request
*er
)
538 struct gfs2_ea_location el
;
541 if (!ip
->i_di
.di_eattr
)
544 error
= gfs2_ea_find(ip
, er
, &el
);
550 if (er
->er_data_len
) {
551 if (GFS2_EA_DATA_LEN(el
.el_ea
) > er
->er_data_len
)
554 error
= gfs2_ea_get_copy(ip
, &el
, er
->er_data
);
557 error
= GFS2_EA_DATA_LEN(el
.el_ea
);
569 * Returns: actual size of data on success, -errno on error
572 int gfs2_ea_get(struct gfs2_inode
*ip
, struct gfs2_ea_request
*er
)
574 struct gfs2_holder i_gh
;
577 if (!er
->er_name_len
||
578 er
->er_name_len
> GFS2_EA_MAX_NAME_LEN
)
580 if (!er
->er_data
|| !er
->er_data_len
) {
585 error
= gfs2_glock_nq_init(ip
->i_gl
,
586 LM_ST_SHARED
, LM_FLAG_ANY
,
591 error
= gfs2_ea_ops
[er
->er_type
]->eo_get(ip
, er
);
593 gfs2_glock_dq_uninit(&i_gh
);
599 * ea_alloc_blk - allocates a new block for extended attributes.
600 * @ip: A pointer to the inode that's getting extended attributes
606 static int ea_alloc_blk(struct gfs2_inode
*ip
, struct buffer_head
**bhp
)
608 struct gfs2_sbd
*sdp
= ip
->i_sbd
;
609 struct gfs2_ea_header
*ea
;
612 block
= gfs2_alloc_meta(ip
);
614 *bhp
= gfs2_meta_new(ip
->i_gl
, block
);
615 gfs2_trans_add_bh(ip
->i_gl
, *bhp
, 1);
616 gfs2_metatype_set(*bhp
, GFS2_METATYPE_EA
, GFS2_FORMAT_EA
);
617 gfs2_buffer_clear_tail(*bhp
, sizeof(struct gfs2_meta_header
));
619 ea
= GFS2_EA_BH2FIRST(*bhp
);
620 ea
->ea_rec_len
= cpu_to_be32(sdp
->sd_jbsize
);
621 ea
->ea_type
= GFS2_EATYPE_UNUSED
;
622 ea
->ea_flags
= GFS2_EAFLAG_LAST
;
625 ip
->i_di
.di_blocks
++;
631 * ea_write - writes the request info to an ea, creating new blocks if
633 * @ip: inode that is being modified
634 * @ea: the location of the new ea in a block
635 * @er: the write request
637 * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags
642 static int ea_write(struct gfs2_inode
*ip
, struct gfs2_ea_header
*ea
,
643 struct gfs2_ea_request
*er
)
645 struct gfs2_sbd
*sdp
= ip
->i_sbd
;
647 ea
->ea_data_len
= cpu_to_be32(er
->er_data_len
);
648 ea
->ea_name_len
= er
->er_name_len
;
649 ea
->ea_type
= er
->er_type
;
652 memcpy(GFS2_EA2NAME(ea
), er
->er_name
, er
->er_name_len
);
654 if (GFS2_EAREQ_SIZE_STUFFED(er
) <= sdp
->sd_jbsize
) {
656 memcpy(GFS2_EA2DATA(ea
), er
->er_data
, er
->er_data_len
);
658 uint64_t *dataptr
= GFS2_EA2DATAPTRS(ea
);
659 const char *data
= er
->er_data
;
660 unsigned int data_len
= er
->er_data_len
;
664 ea
->ea_num_ptrs
= DIV_ROUND_UP(er
->er_data_len
, sdp
->sd_jbsize
);
665 for (x
= 0; x
< ea
->ea_num_ptrs
; x
++) {
666 struct buffer_head
*bh
;
668 int mh_size
= sizeof(struct gfs2_meta_header
);
670 block
= gfs2_alloc_meta(ip
);
672 bh
= gfs2_meta_new(ip
->i_gl
, block
);
673 gfs2_trans_add_bh(ip
->i_gl
, bh
, 1);
674 gfs2_metatype_set(bh
, GFS2_METATYPE_ED
, GFS2_FORMAT_ED
);
676 ip
->i_di
.di_blocks
++;
678 copy
= (data_len
> sdp
->sd_jbsize
) ? sdp
->sd_jbsize
:
680 memcpy(bh
->b_data
+ mh_size
, data
, copy
);
681 if (copy
< sdp
->sd_jbsize
)
682 memset(bh
->b_data
+ mh_size
+ copy
, 0,
683 sdp
->sd_jbsize
- copy
);
685 *dataptr
++ = cpu_to_be64((uint64_t)bh
->b_blocknr
);
692 gfs2_assert_withdraw(sdp
, !data_len
);
698 typedef int (*ea_skeleton_call_t
) (struct gfs2_inode
*ip
,
699 struct gfs2_ea_request
*er
,
702 static int ea_alloc_skeleton(struct gfs2_inode
*ip
, struct gfs2_ea_request
*er
,
704 ea_skeleton_call_t skeleton_call
,
707 struct gfs2_alloc
*al
;
708 struct buffer_head
*dibh
;
711 al
= gfs2_alloc_get(ip
);
713 error
= gfs2_quota_lock(ip
, NO_QUOTA_CHANGE
, NO_QUOTA_CHANGE
);
717 error
= gfs2_quota_check(ip
, ip
->i_di
.di_uid
, ip
->i_di
.di_gid
);
721 al
->al_requested
= blks
;
723 error
= gfs2_inplace_reserve(ip
);
727 error
= gfs2_trans_begin(ip
->i_sbd
,
728 blks
+ al
->al_rgd
->rd_ri
.ri_length
+
729 RES_DINODE
+ RES_STATFS
+ RES_QUOTA
, 0);
733 error
= skeleton_call(ip
, er
, private);
737 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
739 if (er
->er_flags
& GFS2_ERF_MODE
) {
740 gfs2_assert_withdraw(ip
->i_sbd
,
741 (ip
->i_di
.di_mode
& S_IFMT
) ==
742 (er
->er_mode
& S_IFMT
));
743 ip
->i_di
.di_mode
= er
->er_mode
;
745 ip
->i_di
.di_ctime
= get_seconds();
746 gfs2_trans_add_bh(ip
->i_gl
, dibh
, 1);
747 gfs2_dinode_out(&ip
->i_di
, dibh
->b_data
);
752 gfs2_trans_end(ip
->i_sbd
);
755 gfs2_inplace_release(ip
);
758 gfs2_quota_unlock(ip
);
766 static int ea_init_i(struct gfs2_inode
*ip
, struct gfs2_ea_request
*er
,
769 struct buffer_head
*bh
;
772 error
= ea_alloc_blk(ip
, &bh
);
776 ip
->i_di
.di_eattr
= bh
->b_blocknr
;
777 error
= ea_write(ip
, GFS2_EA_BH2FIRST(bh
), er
);
785 * ea_init - initializes a new eattr block
792 static int ea_init(struct gfs2_inode
*ip
, struct gfs2_ea_request
*er
)
794 unsigned int jbsize
= ip
->i_sbd
->sd_jbsize
;
795 unsigned int blks
= 1;
797 if (GFS2_EAREQ_SIZE_STUFFED(er
) > jbsize
)
798 blks
+= DIV_ROUND_UP(er
->er_data_len
, jbsize
);
800 return ea_alloc_skeleton(ip
, er
, blks
, ea_init_i
, NULL
);
803 static struct gfs2_ea_header
*ea_split_ea(struct gfs2_ea_header
*ea
)
805 uint32_t ea_size
= GFS2_EA_SIZE(ea
);
806 struct gfs2_ea_header
*new = (struct gfs2_ea_header
*)((char *)ea
+
808 uint32_t new_size
= GFS2_EA_REC_LEN(ea
) - ea_size
;
809 int last
= ea
->ea_flags
& GFS2_EAFLAG_LAST
;
811 ea
->ea_rec_len
= cpu_to_be32(ea_size
);
812 ea
->ea_flags
^= last
;
814 new->ea_rec_len
= cpu_to_be32(new_size
);
815 new->ea_flags
= last
;
820 static void ea_set_remove_stuffed(struct gfs2_inode
*ip
,
821 struct gfs2_ea_location
*el
)
823 struct gfs2_ea_header
*ea
= el
->el_ea
;
824 struct gfs2_ea_header
*prev
= el
->el_prev
;
827 gfs2_trans_add_bh(ip
->i_gl
, el
->el_bh
, 1);
829 if (!prev
|| !GFS2_EA_IS_STUFFED(ea
)) {
830 ea
->ea_type
= GFS2_EATYPE_UNUSED
;
832 } else if (GFS2_EA2NEXT(prev
) != ea
) {
833 prev
= GFS2_EA2NEXT(prev
);
834 gfs2_assert_withdraw(ip
->i_sbd
, GFS2_EA2NEXT(prev
) == ea
);
837 len
= GFS2_EA_REC_LEN(prev
) + GFS2_EA_REC_LEN(ea
);
838 prev
->ea_rec_len
= cpu_to_be32(len
);
840 if (GFS2_EA_IS_LAST(ea
))
841 prev
->ea_flags
|= GFS2_EAFLAG_LAST
;
847 struct gfs2_ea_request
*es_er
;
848 struct gfs2_ea_location
*es_el
;
850 struct buffer_head
*es_bh
;
851 struct gfs2_ea_header
*es_ea
;
854 static int ea_set_simple_noalloc(struct gfs2_inode
*ip
, struct buffer_head
*bh
,
855 struct gfs2_ea_header
*ea
, struct ea_set
*es
)
857 struct gfs2_ea_request
*er
= es
->es_er
;
858 struct buffer_head
*dibh
;
861 error
= gfs2_trans_begin(ip
->i_sbd
, RES_DINODE
+ 2 * RES_EATTR
, 0);
865 gfs2_trans_add_bh(ip
->i_gl
, bh
, 1);
868 ea
= ea_split_ea(ea
);
870 ea_write(ip
, ea
, er
);
873 ea_set_remove_stuffed(ip
, es
->es_el
);
875 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
879 if (er
->er_flags
& GFS2_ERF_MODE
) {
880 gfs2_assert_withdraw(ip
->i_sbd
,
881 (ip
->i_di
.di_mode
& S_IFMT
) == (er
->er_mode
& S_IFMT
));
882 ip
->i_di
.di_mode
= er
->er_mode
;
884 ip
->i_di
.di_ctime
= get_seconds();
885 gfs2_trans_add_bh(ip
->i_gl
, dibh
, 1);
886 gfs2_dinode_out(&ip
->i_di
, dibh
->b_data
);
889 gfs2_trans_end(ip
->i_sbd
);
894 static int ea_set_simple_alloc(struct gfs2_inode
*ip
,
895 struct gfs2_ea_request
*er
, void *private)
897 struct ea_set
*es
= private;
898 struct gfs2_ea_header
*ea
= es
->es_ea
;
901 gfs2_trans_add_bh(ip
->i_gl
, es
->es_bh
, 1);
904 ea
= ea_split_ea(ea
);
906 error
= ea_write(ip
, ea
, er
);
911 ea_set_remove_stuffed(ip
, es
->es_el
);
916 static int ea_set_simple(struct gfs2_inode
*ip
, struct buffer_head
*bh
,
917 struct gfs2_ea_header
*ea
, struct gfs2_ea_header
*prev
,
920 struct ea_set
*es
= private;
925 stuffed
= ea_calc_size(ip
->i_sbd
, es
->es_er
, &size
);
927 if (ea
->ea_type
== GFS2_EATYPE_UNUSED
) {
928 if (GFS2_EA_REC_LEN(ea
) < size
)
930 if (!GFS2_EA_IS_STUFFED(ea
)) {
931 error
= ea_remove_unstuffed(ip
, bh
, ea
, prev
, 1);
936 } else if (GFS2_EA_REC_LEN(ea
) - GFS2_EA_SIZE(ea
) >= size
)
942 error
= ea_set_simple_noalloc(ip
, bh
, ea
, es
);
950 blks
= 2 + DIV_ROUND_UP(es
->es_er
->er_data_len
,
951 ip
->i_sbd
->sd_jbsize
);
953 error
= ea_alloc_skeleton(ip
, es
->es_er
, blks
,
954 ea_set_simple_alloc
, es
);
962 static int ea_set_block(struct gfs2_inode
*ip
, struct gfs2_ea_request
*er
,
965 struct gfs2_sbd
*sdp
= ip
->i_sbd
;
966 struct buffer_head
*indbh
, *newbh
;
969 int mh_size
= sizeof(struct gfs2_meta_header
);
971 if (ip
->i_di
.di_flags
& GFS2_DIF_EA_INDIRECT
) {
974 error
= gfs2_meta_read(ip
->i_gl
, ip
->i_di
.di_eattr
,
975 DIO_START
| DIO_WAIT
, &indbh
);
979 if (gfs2_metatype_check(sdp
, indbh
, GFS2_METATYPE_IN
)) {
984 eablk
= (uint64_t *)(indbh
->b_data
+ mh_size
);
985 end
= eablk
+ sdp
->sd_inptrs
;
987 for (; eablk
< end
; eablk
++)
996 gfs2_trans_add_bh(ip
->i_gl
, indbh
, 1);
1000 blk
= gfs2_alloc_meta(ip
);
1002 indbh
= gfs2_meta_new(ip
->i_gl
, blk
);
1003 gfs2_trans_add_bh(ip
->i_gl
, indbh
, 1);
1004 gfs2_metatype_set(indbh
, GFS2_METATYPE_IN
, GFS2_FORMAT_IN
);
1005 gfs2_buffer_clear_tail(indbh
, mh_size
);
1007 eablk
= (uint64_t *)(indbh
->b_data
+ mh_size
);
1008 *eablk
= cpu_to_be64(ip
->i_di
.di_eattr
);
1009 ip
->i_di
.di_eattr
= blk
;
1010 ip
->i_di
.di_flags
|= GFS2_DIF_EA_INDIRECT
;
1011 ip
->i_di
.di_blocks
++;
1016 error
= ea_alloc_blk(ip
, &newbh
);
1020 *eablk
= cpu_to_be64((uint64_t)newbh
->b_blocknr
);
1021 error
= ea_write(ip
, GFS2_EA_BH2FIRST(newbh
), er
);
1027 ea_set_remove_stuffed(ip
, (struct gfs2_ea_location
*)private);
1035 static int ea_set_i(struct gfs2_inode
*ip
, struct gfs2_ea_request
*er
,
1036 struct gfs2_ea_location
*el
)
1039 unsigned int blks
= 2;
1042 memset(&es
, 0, sizeof(struct ea_set
));
1046 error
= ea_foreach(ip
, ea_set_simple
, &es
);
1052 if (!(ip
->i_di
.di_flags
& GFS2_DIF_EA_INDIRECT
))
1054 if (GFS2_EAREQ_SIZE_STUFFED(er
) > ip
->i_sbd
->sd_jbsize
)
1055 blks
+= DIV_ROUND_UP(er
->er_data_len
, ip
->i_sbd
->sd_jbsize
);
1057 return ea_alloc_skeleton(ip
, er
, blks
, ea_set_block
, el
);
1060 static int ea_set_remove_unstuffed(struct gfs2_inode
*ip
,
1061 struct gfs2_ea_location
*el
)
1063 if (el
->el_prev
&& GFS2_EA2NEXT(el
->el_prev
) != el
->el_ea
) {
1064 el
->el_prev
= GFS2_EA2NEXT(el
->el_prev
);
1065 gfs2_assert_withdraw(ip
->i_sbd
,
1066 GFS2_EA2NEXT(el
->el_prev
) == el
->el_ea
);
1069 return ea_remove_unstuffed(ip
, el
->el_bh
, el
->el_ea
, el
->el_prev
,0);
1072 int gfs2_ea_set_i(struct gfs2_inode
*ip
, struct gfs2_ea_request
*er
)
1074 struct gfs2_ea_location el
;
1077 if (!ip
->i_di
.di_eattr
) {
1078 if (er
->er_flags
& XATTR_REPLACE
)
1080 return ea_init(ip
, er
);
1083 error
= gfs2_ea_find(ip
, er
, &el
);
1088 if (ip
->i_di
.di_flags
& GFS2_DIF_APPENDONLY
) {
1094 if (!(er
->er_flags
& XATTR_CREATE
)) {
1095 int unstuffed
= !GFS2_EA_IS_STUFFED(el
.el_ea
);
1096 error
= ea_set_i(ip
, er
, &el
);
1097 if (!error
&& unstuffed
)
1098 ea_set_remove_unstuffed(ip
, &el
);
1104 if (!(er
->er_flags
& XATTR_REPLACE
))
1105 error
= ea_set_i(ip
, er
, NULL
);
1111 int gfs2_ea_set(struct gfs2_inode
*ip
, struct gfs2_ea_request
*er
)
1113 struct gfs2_holder i_gh
;
1116 if (!er
->er_name_len
||
1117 er
->er_name_len
> GFS2_EA_MAX_NAME_LEN
)
1119 if (!er
->er_data
|| !er
->er_data_len
) {
1121 er
->er_data_len
= 0;
1123 error
= ea_check_size(ip
->i_sbd
, er
);
1127 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, &i_gh
);
1131 if (IS_IMMUTABLE(ip
->i_vnode
))
1134 error
= gfs2_ea_ops
[er
->er_type
]->eo_set(ip
, er
);
1136 gfs2_glock_dq_uninit(&i_gh
);
1141 static int ea_remove_stuffed(struct gfs2_inode
*ip
, struct gfs2_ea_location
*el
)
1143 struct gfs2_ea_header
*ea
= el
->el_ea
;
1144 struct gfs2_ea_header
*prev
= el
->el_prev
;
1145 struct buffer_head
*dibh
;
1148 error
= gfs2_trans_begin(ip
->i_sbd
, RES_DINODE
+ RES_EATTR
, 0);
1152 gfs2_trans_add_bh(ip
->i_gl
, el
->el_bh
, 1);
1157 len
= GFS2_EA_REC_LEN(prev
) + GFS2_EA_REC_LEN(ea
);
1158 prev
->ea_rec_len
= cpu_to_be32(len
);
1160 if (GFS2_EA_IS_LAST(ea
))
1161 prev
->ea_flags
|= GFS2_EAFLAG_LAST
;
1163 ea
->ea_type
= GFS2_EATYPE_UNUSED
;
1165 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
1167 ip
->i_di
.di_ctime
= get_seconds();
1168 gfs2_trans_add_bh(ip
->i_gl
, dibh
, 1);
1169 gfs2_dinode_out(&ip
->i_di
, dibh
->b_data
);
1173 gfs2_trans_end(ip
->i_sbd
);
1178 int gfs2_ea_remove_i(struct gfs2_inode
*ip
, struct gfs2_ea_request
*er
)
1180 struct gfs2_ea_location el
;
1183 if (!ip
->i_di
.di_eattr
)
1186 error
= gfs2_ea_find(ip
, er
, &el
);
1192 if (GFS2_EA_IS_STUFFED(el
.el_ea
))
1193 error
= ea_remove_stuffed(ip
, &el
);
1195 error
= ea_remove_unstuffed(ip
, el
.el_bh
, el
.el_ea
, el
.el_prev
,
1204 * gfs2_ea_remove - sets (or creates or replaces) an extended attribute
1205 * @ip: pointer to the inode of the target file
1206 * @er: request information
1211 int gfs2_ea_remove(struct gfs2_inode
*ip
, struct gfs2_ea_request
*er
)
1213 struct gfs2_holder i_gh
;
1216 if (!er
->er_name_len
|| er
->er_name_len
> GFS2_EA_MAX_NAME_LEN
)
1219 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, &i_gh
);
1223 if (IS_IMMUTABLE(ip
->i_vnode
) || IS_APPEND(ip
->i_vnode
))
1226 error
= gfs2_ea_ops
[er
->er_type
]->eo_remove(ip
, er
);
1228 gfs2_glock_dq_uninit(&i_gh
);
1233 static int ea_acl_chmod_unstuffed(struct gfs2_inode
*ip
,
1234 struct gfs2_ea_header
*ea
, char *data
)
1236 struct gfs2_sbd
*sdp
= ip
->i_sbd
;
1237 struct buffer_head
**bh
;
1238 unsigned int amount
= GFS2_EA_DATA_LEN(ea
);
1239 unsigned int nptrs
= DIV_ROUND_UP(amount
, sdp
->sd_jbsize
);
1240 uint64_t *dataptrs
= GFS2_EA2DATAPTRS(ea
);
1244 bh
= kcalloc(nptrs
, sizeof(struct buffer_head
*), GFP_KERNEL
);
1248 error
= gfs2_trans_begin(sdp
, nptrs
+ RES_DINODE
, 0);
1252 for (x
= 0; x
< nptrs
; x
++) {
1253 error
= gfs2_meta_read(ip
->i_gl
, be64_to_cpu(*dataptrs
),
1263 for (x
= 0; x
< nptrs
; x
++) {
1264 error
= gfs2_meta_reread(sdp
, bh
[x
], DIO_WAIT
);
1266 for (; x
< nptrs
; x
++)
1270 if (gfs2_metatype_check(sdp
, bh
[x
], GFS2_METATYPE_ED
)) {
1271 for (; x
< nptrs
; x
++)
1277 gfs2_trans_add_bh(ip
->i_gl
, bh
[x
], 1);
1279 memcpy(bh
[x
]->b_data
+ sizeof(struct gfs2_meta_header
),
1281 (sdp
->sd_jbsize
> amount
) ? amount
: sdp
->sd_jbsize
);
1283 amount
-= sdp
->sd_jbsize
;
1284 data
+= sdp
->sd_jbsize
;
1295 gfs2_trans_end(sdp
);
1301 int gfs2_ea_acl_chmod(struct gfs2_inode
*ip
, struct gfs2_ea_location
*el
,
1302 struct iattr
*attr
, char *data
)
1304 struct buffer_head
*dibh
;
1307 if (GFS2_EA_IS_STUFFED(el
->el_ea
)) {
1308 error
= gfs2_trans_begin(ip
->i_sbd
, RES_DINODE
+ RES_EATTR
, 0);
1312 gfs2_trans_add_bh(ip
->i_gl
, el
->el_bh
, 1);
1313 memcpy(GFS2_EA2DATA(el
->el_ea
),
1315 GFS2_EA_DATA_LEN(el
->el_ea
));
1317 error
= ea_acl_chmod_unstuffed(ip
, el
->el_ea
, data
);
1322 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
1324 error
= inode_setattr(ip
->i_vnode
, attr
);
1325 gfs2_assert_warn(ip
->i_sbd
, !error
);
1326 gfs2_inode_attr_out(ip
);
1327 gfs2_trans_add_bh(ip
->i_gl
, dibh
, 1);
1328 gfs2_dinode_out(&ip
->i_di
, dibh
->b_data
);
1332 gfs2_trans_end(ip
->i_sbd
);
1337 static int ea_dealloc_indirect(struct gfs2_inode
*ip
)
1339 struct gfs2_sbd
*sdp
= ip
->i_sbd
;
1340 struct gfs2_rgrp_list rlist
;
1341 struct buffer_head
*indbh
, *dibh
;
1342 uint64_t *eablk
, *end
;
1343 unsigned int rg_blocks
= 0;
1344 uint64_t bstart
= 0;
1345 unsigned int blen
= 0;
1346 unsigned int blks
= 0;
1350 memset(&rlist
, 0, sizeof(struct gfs2_rgrp_list
));
1352 error
= gfs2_meta_read(ip
->i_gl
, ip
->i_di
.di_eattr
,
1353 DIO_START
| DIO_WAIT
, &indbh
);
1357 if (gfs2_metatype_check(sdp
, indbh
, GFS2_METATYPE_IN
)) {
1362 eablk
= (uint64_t *)(indbh
->b_data
+ sizeof(struct gfs2_meta_header
));
1363 end
= eablk
+ sdp
->sd_inptrs
;
1365 for (; eablk
< end
; eablk
++) {
1370 bn
= be64_to_cpu(*eablk
);
1372 if (bstart
+ blen
== bn
)
1376 gfs2_rlist_add(sdp
, &rlist
, bstart
);
1383 gfs2_rlist_add(sdp
, &rlist
, bstart
);
1387 gfs2_rlist_alloc(&rlist
, LM_ST_EXCLUSIVE
, 0);
1389 for (x
= 0; x
< rlist
.rl_rgrps
; x
++) {
1390 struct gfs2_rgrpd
*rgd
;
1391 rgd
= rlist
.rl_ghs
[x
].gh_gl
->gl_object
;
1392 rg_blocks
+= rgd
->rd_ri
.ri_length
;
1395 error
= gfs2_glock_nq_m(rlist
.rl_rgrps
, rlist
.rl_ghs
);
1397 goto out_rlist_free
;
1399 error
= gfs2_trans_begin(sdp
, rg_blocks
+ RES_DINODE
+
1400 RES_INDIRECT
+ RES_STATFS
+
1405 gfs2_trans_add_bh(ip
->i_gl
, indbh
, 1);
1407 eablk
= (uint64_t *)(indbh
->b_data
+ sizeof(struct gfs2_meta_header
));
1411 for (; eablk
< end
; eablk
++) {
1416 bn
= be64_to_cpu(*eablk
);
1418 if (bstart
+ blen
== bn
)
1422 gfs2_free_meta(ip
, bstart
, blen
);
1428 if (!ip
->i_di
.di_blocks
)
1429 gfs2_consist_inode(ip
);
1430 ip
->i_di
.di_blocks
--;
1433 gfs2_free_meta(ip
, bstart
, blen
);
1435 ip
->i_di
.di_flags
&= ~GFS2_DIF_EA_INDIRECT
;
1437 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
1439 gfs2_trans_add_bh(ip
->i_gl
, dibh
, 1);
1440 gfs2_dinode_out(&ip
->i_di
, dibh
->b_data
);
1444 gfs2_trans_end(sdp
);
1447 gfs2_glock_dq_m(rlist
.rl_rgrps
, rlist
.rl_ghs
);
1450 gfs2_rlist_free(&rlist
);
1458 static int ea_dealloc_block(struct gfs2_inode
*ip
)
1460 struct gfs2_sbd
*sdp
= ip
->i_sbd
;
1461 struct gfs2_alloc
*al
= &ip
->i_alloc
;
1462 struct gfs2_rgrpd
*rgd
;
1463 struct buffer_head
*dibh
;
1466 rgd
= gfs2_blk2rgrpd(sdp
, ip
->i_di
.di_eattr
);
1468 gfs2_consist_inode(ip
);
1472 error
= gfs2_glock_nq_init(rgd
->rd_gl
, LM_ST_EXCLUSIVE
, 0,
1477 error
= gfs2_trans_begin(sdp
, RES_RG_BIT
+ RES_DINODE
+
1478 RES_STATFS
+ RES_QUOTA
, 1);
1482 gfs2_free_meta(ip
, ip
->i_di
.di_eattr
, 1);
1484 ip
->i_di
.di_eattr
= 0;
1485 if (!ip
->i_di
.di_blocks
)
1486 gfs2_consist_inode(ip
);
1487 ip
->i_di
.di_blocks
--;
1489 error
= gfs2_meta_inode_buffer(ip
, &dibh
);
1491 gfs2_trans_add_bh(ip
->i_gl
, dibh
, 1);
1492 gfs2_dinode_out(&ip
->i_di
, dibh
->b_data
);
1496 gfs2_trans_end(sdp
);
1499 gfs2_glock_dq_uninit(&al
->al_rgd_gh
);
1505 * gfs2_ea_dealloc - deallocate the extended attribute fork
1511 int gfs2_ea_dealloc(struct gfs2_inode
*ip
)
1513 struct gfs2_alloc
*al
;
1516 al
= gfs2_alloc_get(ip
);
1518 error
= gfs2_quota_hold(ip
, NO_QUOTA_CHANGE
, NO_QUOTA_CHANGE
);
1522 error
= gfs2_rindex_hold(ip
->i_sbd
, &al
->al_ri_gh
);
1526 error
= ea_foreach(ip
, ea_dealloc_unstuffed
, NULL
);
1530 if (ip
->i_di
.di_flags
& GFS2_DIF_EA_INDIRECT
) {
1531 error
= ea_dealloc_indirect(ip
);
1536 error
= ea_dealloc_block(ip
);
1539 gfs2_glock_dq_uninit(&al
->al_ri_gh
);
1542 gfs2_quota_unhold(ip
);