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/semaphore.h>
18 #include <asm/uaccess.h>
21 #include "lm_interface.h"
35 * ea_calc_size - returns the acutal number of bytes the request will take up
36 * (not counting any unstuffed data blocks)
41 * Returns: 1 if the EA should be stuffed
44 static int ea_calc_size(struct gfs2_sbd *sdp, struct gfs2_ea_request *er,
47 *size = GFS2_EAREQ_SIZE_STUFFED(er);
48 if (*size <= sdp->sd_jbsize)
51 *size = GFS2_EAREQ_SIZE_UNSTUFFED(sdp, er);
56 static int ea_check_size(struct gfs2_sbd *sdp, struct gfs2_ea_request *er)
60 if (er->er_data_len > GFS2_EA_MAX_DATA_LEN)
63 ea_calc_size(sdp, er, &size);
65 /* This can only happen with 512 byte blocks */
66 if (size > sdp->sd_jbsize)
72 typedef int (*ea_call_t) (struct gfs2_inode *ip,
73 struct buffer_head *bh,
74 struct gfs2_ea_header *ea,
75 struct gfs2_ea_header *prev,
78 static int ea_foreach_i(struct gfs2_inode *ip, struct buffer_head *bh,
79 ea_call_t ea_call, void *data)
81 struct gfs2_ea_header *ea, *prev = NULL;
84 if (gfs2_metatype_check(ip->i_sbd, bh, GFS2_METATYPE_EA))
87 for (ea = GFS2_EA_BH2FIRST(bh);; prev = ea, ea = GFS2_EA2NEXT(ea)) {
88 if (!GFS2_EA_REC_LEN(ea))
90 if (!(bh->b_data <= (char *)ea &&
91 (char *)GFS2_EA2NEXT(ea) <=
92 bh->b_data + bh->b_size))
94 if (!GFS2_EATYPE_VALID(ea->ea_type))
97 error = ea_call(ip, bh, ea, prev, data);
101 if (GFS2_EA_IS_LAST(ea)) {
102 if ((char *)GFS2_EA2NEXT(ea) !=
103 bh->b_data + bh->b_size)
112 gfs2_consist_inode(ip);
116 static int ea_foreach(struct gfs2_inode *ip, ea_call_t ea_call, void *data)
118 struct buffer_head *bh, *eabh;
119 uint64_t *eablk, *end;
122 error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr,
123 DIO_START | DIO_WAIT, &bh);
127 if (!(ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT)) {
128 error = ea_foreach_i(ip, bh, ea_call, data);
132 if (gfs2_metatype_check(ip->i_sbd, bh, GFS2_METATYPE_IN)) {
137 eablk = (uint64_t *)(bh->b_data + sizeof(struct gfs2_meta_header));
138 end = eablk + ip->i_sbd->sd_inptrs;
140 for (; eablk < end; eablk++) {
145 bn = be64_to_cpu(*eablk);
147 error = gfs2_meta_read(ip->i_gl, bn, DIO_START | DIO_WAIT,
151 error = ea_foreach_i(ip, eabh, ea_call, data);
163 struct gfs2_ea_request *ef_er;
164 struct gfs2_ea_location *ef_el;
167 static int ea_find_i(struct gfs2_inode *ip, struct buffer_head *bh,
168 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
171 struct ea_find *ef = private;
172 struct gfs2_ea_request *er = ef->ef_er;
174 if (ea->ea_type == GFS2_EATYPE_UNUSED)
177 if (ea->ea_type == er->er_type) {
178 if (ea->ea_name_len == er->er_name_len &&
179 !memcmp(GFS2_EA2NAME(ea), er->er_name, ea->ea_name_len)) {
180 struct gfs2_ea_location *el = ef->ef_el;
190 else if ((ip->i_di.di_flags & GFS2_DIF_EA_PACKED) &&
191 er->er_type == GFS2_EATYPE_SYS)
198 int gfs2_ea_find(struct gfs2_inode *ip, struct gfs2_ea_request *er,
199 struct gfs2_ea_location *el)
207 memset(el, 0, sizeof(struct gfs2_ea_location));
209 error = ea_foreach(ip, ea_find_i, &ef);
217 * ea_dealloc_unstuffed -
224 * Take advantage of the fact that all unstuffed blocks are
225 * allocated from the same RG. But watch, this may not always
231 static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
232 struct gfs2_ea_header *ea,
233 struct gfs2_ea_header *prev, void *private)
235 int *leave = private;
236 struct gfs2_sbd *sdp = ip->i_sbd;
237 struct gfs2_rgrpd *rgd;
238 struct gfs2_holder rg_gh;
239 struct buffer_head *dibh;
240 uint64_t *dataptrs, bn = 0;
242 unsigned int blen = 0;
243 unsigned int blks = 0;
247 if (GFS2_EA_IS_STUFFED(ea))
250 dataptrs = GFS2_EA2DATAPTRS(ea);
251 for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++)
254 bn = be64_to_cpu(*dataptrs);
259 rgd = gfs2_blk2rgrpd(sdp, bn);
261 gfs2_consist_inode(ip);
265 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh);
269 error = gfs2_trans_begin(sdp, rgd->rd_ri.ri_length +
270 RES_DINODE + RES_EATTR + RES_STATFS +
275 gfs2_trans_add_bh(ip->i_gl, bh, 1);
277 dataptrs = GFS2_EA2DATAPTRS(ea);
278 for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {
281 bn = be64_to_cpu(*dataptrs);
283 if (bstart + blen == bn)
287 gfs2_free_meta(ip, bstart, blen);
293 if (!ip->i_di.di_blocks)
294 gfs2_consist_inode(ip);
295 ip->i_di.di_blocks--;
298 gfs2_free_meta(ip, bstart, blen);
300 if (prev && !leave) {
303 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
304 prev->ea_rec_len = cpu_to_be32(len);
306 if (GFS2_EA_IS_LAST(ea))
307 prev->ea_flags |= GFS2_EAFLAG_LAST;
309 ea->ea_type = GFS2_EATYPE_UNUSED;
313 error = gfs2_meta_inode_buffer(ip, &dibh);
315 ip->i_di.di_ctime = get_seconds();
316 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
317 gfs2_dinode_out(&ip->i_di, dibh->b_data);
324 gfs2_glock_dq_uninit(&rg_gh);
329 static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
330 struct gfs2_ea_header *ea,
331 struct gfs2_ea_header *prev, int leave)
333 struct gfs2_alloc *al;
336 al = gfs2_alloc_get(ip);
338 error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
342 error = gfs2_rindex_hold(ip->i_sbd, &al->al_ri_gh);
346 error = ea_dealloc_unstuffed(ip,
348 (leave) ? &error : NULL);
350 gfs2_glock_dq_uninit(&al->al_ri_gh);
353 gfs2_quota_unhold(ip);
362 struct gfs2_ea_request *ei_er;
363 unsigned int ei_size;
366 static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh,
367 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
370 struct ea_list *ei = private;
371 struct gfs2_ea_request *er = ei->ei_er;
372 unsigned int ea_size = GFS2_EA_STRLEN(ea);
374 if (ea->ea_type == GFS2_EATYPE_UNUSED)
377 if (er->er_data_len) {
382 if (ei->ei_size + ea_size > er->er_data_len)
385 if (ea->ea_type == GFS2_EATYPE_USR) {
393 memcpy(er->er_data + ei->ei_size,
395 memcpy(er->er_data + ei->ei_size + l,
398 memcpy(er->er_data + ei->ei_size +
403 ei->ei_size += ea_size;
413 * Returns: actual size of data on success, -errno on error
416 int gfs2_ea_list(struct gfs2_inode *ip, struct gfs2_ea_request *er)
418 struct gfs2_holder i_gh;
421 if (!er->er_data || !er->er_data_len) {
426 error = gfs2_glock_nq_init(ip->i_gl,
427 LM_ST_SHARED, LM_FLAG_ANY,
432 if (ip->i_di.di_eattr) {
433 struct ea_list ei = { .ei_er = er, .ei_size = 0 };
435 error = ea_foreach(ip, ea_list_i, &ei);
440 gfs2_glock_dq_uninit(&i_gh);
446 * ea_get_unstuffed - actually copies the unstuffed data into the
455 static int ea_get_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
458 struct gfs2_sbd *sdp = ip->i_sbd;
459 struct buffer_head **bh;
460 unsigned int amount = GFS2_EA_DATA_LEN(ea);
461 unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
462 uint64_t *dataptrs = GFS2_EA2DATAPTRS(ea);
466 bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL);
470 for (x = 0; x < nptrs; x++) {
471 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs),
481 for (x = 0; x < nptrs; x++) {
482 error = gfs2_meta_reread(sdp, bh[x], DIO_WAIT);
484 for (; x < nptrs; x++)
488 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
489 for (; x < nptrs; x++)
496 bh[x]->b_data + sizeof(struct gfs2_meta_header),
497 (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
499 amount -= sdp->sd_jbsize;
500 data += sdp->sd_jbsize;
511 int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
514 if (GFS2_EA_IS_STUFFED(el->el_ea)) {
516 GFS2_EA2DATA(el->el_ea),
517 GFS2_EA_DATA_LEN(el->el_ea));
520 return ea_get_unstuffed(ip, el->el_ea, data);
528 * Returns: actual size of data on success, -errno on error
531 int gfs2_ea_get_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
533 struct gfs2_ea_location el;
536 if (!ip->i_di.di_eattr)
539 error = gfs2_ea_find(ip, er, &el);
545 if (er->er_data_len) {
546 if (GFS2_EA_DATA_LEN(el.el_ea) > er->er_data_len)
549 error = gfs2_ea_get_copy(ip, &el, er->er_data);
552 error = GFS2_EA_DATA_LEN(el.el_ea);
564 * Returns: actual size of data on success, -errno on error
567 int gfs2_ea_get(struct gfs2_inode *ip, struct gfs2_ea_request *er)
569 struct gfs2_holder i_gh;
572 if (!er->er_name_len ||
573 er->er_name_len > GFS2_EA_MAX_NAME_LEN)
575 if (!er->er_data || !er->er_data_len) {
580 error = gfs2_glock_nq_init(ip->i_gl,
581 LM_ST_SHARED, LM_FLAG_ANY,
586 error = gfs2_ea_ops[er->er_type]->eo_get(ip, er);
588 gfs2_glock_dq_uninit(&i_gh);
594 * ea_alloc_blk - allocates a new block for extended attributes.
595 * @ip: A pointer to the inode that's getting extended attributes
601 static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp)
603 struct gfs2_sbd *sdp = ip->i_sbd;
604 struct gfs2_ea_header *ea;
607 block = gfs2_alloc_meta(ip);
609 *bhp = gfs2_meta_new(ip->i_gl, block);
610 gfs2_trans_add_bh(ip->i_gl, *bhp, 1);
611 gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
612 gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header));
614 ea = GFS2_EA_BH2FIRST(*bhp);
615 ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
616 ea->ea_type = GFS2_EATYPE_UNUSED;
617 ea->ea_flags = GFS2_EAFLAG_LAST;
620 ip->i_di.di_blocks++;
626 * ea_write - writes the request info to an ea, creating new blocks if
628 * @ip: inode that is being modified
629 * @ea: the location of the new ea in a block
630 * @er: the write request
632 * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags
637 static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
638 struct gfs2_ea_request *er)
640 struct gfs2_sbd *sdp = ip->i_sbd;
642 ea->ea_data_len = cpu_to_be32(er->er_data_len);
643 ea->ea_name_len = er->er_name_len;
644 ea->ea_type = er->er_type;
647 memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len);
649 if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) {
651 memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len);
653 uint64_t *dataptr = GFS2_EA2DATAPTRS(ea);
654 const char *data = er->er_data;
655 unsigned int data_len = er->er_data_len;
659 ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize);
660 for (x = 0; x < ea->ea_num_ptrs; x++) {
661 struct buffer_head *bh;
663 int mh_size = sizeof(struct gfs2_meta_header);
665 block = gfs2_alloc_meta(ip);
667 bh = gfs2_meta_new(ip->i_gl, block);
668 gfs2_trans_add_bh(ip->i_gl, bh, 1);
669 gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED);
671 ip->i_di.di_blocks++;
673 copy = (data_len > sdp->sd_jbsize) ? sdp->sd_jbsize :
675 memcpy(bh->b_data + mh_size, data, copy);
676 if (copy < sdp->sd_jbsize)
677 memset(bh->b_data + mh_size + copy, 0,
678 sdp->sd_jbsize - copy);
680 *dataptr++ = cpu_to_be64((uint64_t)bh->b_blocknr);
687 gfs2_assert_withdraw(sdp, !data_len);
693 typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip,
694 struct gfs2_ea_request *er,
697 static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er,
699 ea_skeleton_call_t skeleton_call,
702 struct gfs2_alloc *al;
703 struct buffer_head *dibh;
706 al = gfs2_alloc_get(ip);
708 error = gfs2_quota_lock(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
712 error = gfs2_quota_check(ip, ip->i_di.di_uid, ip->i_di.di_gid);
716 al->al_requested = blks;
718 error = gfs2_inplace_reserve(ip);
722 error = gfs2_trans_begin(ip->i_sbd,
723 blks + al->al_rgd->rd_ri.ri_length +
724 RES_DINODE + RES_STATFS + RES_QUOTA, 0);
728 error = skeleton_call(ip, er, private);
732 error = gfs2_meta_inode_buffer(ip, &dibh);
734 if (er->er_flags & GFS2_ERF_MODE) {
735 gfs2_assert_withdraw(ip->i_sbd,
736 (ip->i_di.di_mode & S_IFMT) ==
737 (er->er_mode & S_IFMT));
738 ip->i_di.di_mode = er->er_mode;
740 ip->i_di.di_ctime = get_seconds();
741 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
742 gfs2_dinode_out(&ip->i_di, dibh->b_data);
747 gfs2_trans_end(ip->i_sbd);
750 gfs2_inplace_release(ip);
753 gfs2_quota_unlock(ip);
761 static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
764 struct buffer_head *bh;
767 error = ea_alloc_blk(ip, &bh);
771 ip->i_di.di_eattr = bh->b_blocknr;
772 error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er);
780 * ea_init - initializes a new eattr block
787 static int ea_init(struct gfs2_inode *ip, struct gfs2_ea_request *er)
789 unsigned int jbsize = ip->i_sbd->sd_jbsize;
790 unsigned int blks = 1;
792 if (GFS2_EAREQ_SIZE_STUFFED(er) > jbsize)
793 blks += DIV_ROUND_UP(er->er_data_len, jbsize);
795 return ea_alloc_skeleton(ip, er, blks, ea_init_i, NULL);
798 static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea)
800 uint32_t ea_size = GFS2_EA_SIZE(ea);
801 struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea +
803 uint32_t new_size = GFS2_EA_REC_LEN(ea) - ea_size;
804 int last = ea->ea_flags & GFS2_EAFLAG_LAST;
806 ea->ea_rec_len = cpu_to_be32(ea_size);
807 ea->ea_flags ^= last;
809 new->ea_rec_len = cpu_to_be32(new_size);
810 new->ea_flags = last;
815 static void ea_set_remove_stuffed(struct gfs2_inode *ip,
816 struct gfs2_ea_location *el)
818 struct gfs2_ea_header *ea = el->el_ea;
819 struct gfs2_ea_header *prev = el->el_prev;
822 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
824 if (!prev || !GFS2_EA_IS_STUFFED(ea)) {
825 ea->ea_type = GFS2_EATYPE_UNUSED;
827 } else if (GFS2_EA2NEXT(prev) != ea) {
828 prev = GFS2_EA2NEXT(prev);
829 gfs2_assert_withdraw(ip->i_sbd, GFS2_EA2NEXT(prev) == ea);
832 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
833 prev->ea_rec_len = cpu_to_be32(len);
835 if (GFS2_EA_IS_LAST(ea))
836 prev->ea_flags |= GFS2_EAFLAG_LAST;
842 struct gfs2_ea_request *es_er;
843 struct gfs2_ea_location *es_el;
845 struct buffer_head *es_bh;
846 struct gfs2_ea_header *es_ea;
849 static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh,
850 struct gfs2_ea_header *ea, struct ea_set *es)
852 struct gfs2_ea_request *er = es->es_er;
853 struct buffer_head *dibh;
856 error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + 2 * RES_EATTR, 0);
860 gfs2_trans_add_bh(ip->i_gl, bh, 1);
863 ea = ea_split_ea(ea);
865 ea_write(ip, ea, er);
868 ea_set_remove_stuffed(ip, es->es_el);
870 error = gfs2_meta_inode_buffer(ip, &dibh);
874 if (er->er_flags & GFS2_ERF_MODE) {
875 gfs2_assert_withdraw(ip->i_sbd,
876 (ip->i_di.di_mode & S_IFMT) == (er->er_mode & S_IFMT));
877 ip->i_di.di_mode = er->er_mode;
879 ip->i_di.di_ctime = get_seconds();
880 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
881 gfs2_dinode_out(&ip->i_di, dibh->b_data);
884 gfs2_trans_end(ip->i_sbd);
889 static int ea_set_simple_alloc(struct gfs2_inode *ip,
890 struct gfs2_ea_request *er, void *private)
892 struct ea_set *es = private;
893 struct gfs2_ea_header *ea = es->es_ea;
896 gfs2_trans_add_bh(ip->i_gl, es->es_bh, 1);
899 ea = ea_split_ea(ea);
901 error = ea_write(ip, ea, er);
906 ea_set_remove_stuffed(ip, es->es_el);
911 static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh,
912 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
915 struct ea_set *es = private;
920 stuffed = ea_calc_size(ip->i_sbd, es->es_er, &size);
922 if (ea->ea_type == GFS2_EATYPE_UNUSED) {
923 if (GFS2_EA_REC_LEN(ea) < size)
925 if (!GFS2_EA_IS_STUFFED(ea)) {
926 error = ea_remove_unstuffed(ip, bh, ea, prev, 1);
931 } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size)
937 error = ea_set_simple_noalloc(ip, bh, ea, es);
945 blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len,
946 ip->i_sbd->sd_jbsize);
948 error = ea_alloc_skeleton(ip, es->es_er, blks,
949 ea_set_simple_alloc, es);
957 static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er,
960 struct gfs2_sbd *sdp = ip->i_sbd;
961 struct buffer_head *indbh, *newbh;
964 int mh_size = sizeof(struct gfs2_meta_header);
966 if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) {
969 error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr,
970 DIO_START | DIO_WAIT, &indbh);
974 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
979 eablk = (uint64_t *)(indbh->b_data + mh_size);
980 end = eablk + sdp->sd_inptrs;
982 for (; eablk < end; eablk++)
991 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
995 blk = gfs2_alloc_meta(ip);
997 indbh = gfs2_meta_new(ip->i_gl, blk);
998 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
999 gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN);
1000 gfs2_buffer_clear_tail(indbh, mh_size);
1002 eablk = (uint64_t *)(indbh->b_data + mh_size);
1003 *eablk = cpu_to_be64(ip->i_di.di_eattr);
1004 ip->i_di.di_eattr = blk;
1005 ip->i_di.di_flags |= GFS2_DIF_EA_INDIRECT;
1006 ip->i_di.di_blocks++;
1011 error = ea_alloc_blk(ip, &newbh);
1015 *eablk = cpu_to_be64((uint64_t)newbh->b_blocknr);
1016 error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er);
1022 ea_set_remove_stuffed(ip, (struct gfs2_ea_location *)private);
1030 static int ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
1031 struct gfs2_ea_location *el)
1034 unsigned int blks = 2;
1037 memset(&es, 0, sizeof(struct ea_set));
1041 error = ea_foreach(ip, ea_set_simple, &es);
1047 if (!(ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT))
1049 if (GFS2_EAREQ_SIZE_STUFFED(er) > ip->i_sbd->sd_jbsize)
1050 blks += DIV_ROUND_UP(er->er_data_len, ip->i_sbd->sd_jbsize);
1052 return ea_alloc_skeleton(ip, er, blks, ea_set_block, el);
1055 static int ea_set_remove_unstuffed(struct gfs2_inode *ip,
1056 struct gfs2_ea_location *el)
1058 if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) {
1059 el->el_prev = GFS2_EA2NEXT(el->el_prev);
1060 gfs2_assert_withdraw(ip->i_sbd,
1061 GFS2_EA2NEXT(el->el_prev) == el->el_ea);
1064 return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev,0);
1067 int gfs2_ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1069 struct gfs2_ea_location el;
1072 if (!ip->i_di.di_eattr) {
1073 if (er->er_flags & XATTR_REPLACE)
1075 return ea_init(ip, er);
1078 error = gfs2_ea_find(ip, er, &el);
1083 if (ip->i_di.di_flags & GFS2_DIF_APPENDONLY) {
1089 if (!(er->er_flags & XATTR_CREATE)) {
1090 int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea);
1091 error = ea_set_i(ip, er, &el);
1092 if (!error && unstuffed)
1093 ea_set_remove_unstuffed(ip, &el);
1099 if (!(er->er_flags & XATTR_REPLACE))
1100 error = ea_set_i(ip, er, NULL);
1106 int gfs2_ea_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1108 struct gfs2_holder i_gh;
1111 if (!er->er_name_len ||
1112 er->er_name_len > GFS2_EA_MAX_NAME_LEN)
1114 if (!er->er_data || !er->er_data_len) {
1116 er->er_data_len = 0;
1118 error = ea_check_size(ip->i_sbd, er);
1122 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1126 if (IS_IMMUTABLE(ip->i_vnode))
1129 error = gfs2_ea_ops[er->er_type]->eo_set(ip, er);
1131 gfs2_glock_dq_uninit(&i_gh);
1136 static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el)
1138 struct gfs2_ea_header *ea = el->el_ea;
1139 struct gfs2_ea_header *prev = el->el_prev;
1140 struct buffer_head *dibh;
1143 error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + RES_EATTR, 0);
1147 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
1152 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
1153 prev->ea_rec_len = cpu_to_be32(len);
1155 if (GFS2_EA_IS_LAST(ea))
1156 prev->ea_flags |= GFS2_EAFLAG_LAST;
1158 ea->ea_type = GFS2_EATYPE_UNUSED;
1160 error = gfs2_meta_inode_buffer(ip, &dibh);
1162 ip->i_di.di_ctime = get_seconds();
1163 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1164 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1168 gfs2_trans_end(ip->i_sbd);
1173 int gfs2_ea_remove_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1175 struct gfs2_ea_location el;
1178 if (!ip->i_di.di_eattr)
1181 error = gfs2_ea_find(ip, er, &el);
1187 if (GFS2_EA_IS_STUFFED(el.el_ea))
1188 error = ea_remove_stuffed(ip, &el);
1190 error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev,
1199 * gfs2_ea_remove - sets (or creates or replaces) an extended attribute
1200 * @ip: pointer to the inode of the target file
1201 * @er: request information
1206 int gfs2_ea_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1208 struct gfs2_holder i_gh;
1211 if (!er->er_name_len || er->er_name_len > GFS2_EA_MAX_NAME_LEN)
1214 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1218 if (IS_IMMUTABLE(ip->i_vnode) || IS_APPEND(ip->i_vnode))
1221 error = gfs2_ea_ops[er->er_type]->eo_remove(ip, er);
1223 gfs2_glock_dq_uninit(&i_gh);
1228 static int ea_acl_chmod_unstuffed(struct gfs2_inode *ip,
1229 struct gfs2_ea_header *ea, char *data)
1231 struct gfs2_sbd *sdp = ip->i_sbd;
1232 struct buffer_head **bh;
1233 unsigned int amount = GFS2_EA_DATA_LEN(ea);
1234 unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
1235 uint64_t *dataptrs = GFS2_EA2DATAPTRS(ea);
1239 bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL);
1243 error = gfs2_trans_begin(sdp, nptrs + RES_DINODE, 0);
1247 for (x = 0; x < nptrs; x++) {
1248 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs),
1258 for (x = 0; x < nptrs; x++) {
1259 error = gfs2_meta_reread(sdp, bh[x], DIO_WAIT);
1261 for (; x < nptrs; x++)
1265 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
1266 for (; x < nptrs; x++)
1272 gfs2_trans_add_bh(ip->i_gl, bh[x], 1);
1274 memcpy(bh[x]->b_data + sizeof(struct gfs2_meta_header),
1276 (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
1278 amount -= sdp->sd_jbsize;
1279 data += sdp->sd_jbsize;
1290 gfs2_trans_end(sdp);
1296 int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el,
1297 struct iattr *attr, char *data)
1299 struct buffer_head *dibh;
1302 if (GFS2_EA_IS_STUFFED(el->el_ea)) {
1303 error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + RES_EATTR, 0);
1307 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
1308 memcpy(GFS2_EA2DATA(el->el_ea),
1310 GFS2_EA_DATA_LEN(el->el_ea));
1312 error = ea_acl_chmod_unstuffed(ip, el->el_ea, data);
1317 error = gfs2_meta_inode_buffer(ip, &dibh);
1319 error = inode_setattr(ip->i_vnode, attr);
1320 gfs2_assert_warn(ip->i_sbd, !error);
1321 gfs2_inode_attr_out(ip);
1322 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1323 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1327 gfs2_trans_end(ip->i_sbd);
1332 static int ea_dealloc_indirect(struct gfs2_inode *ip)
1334 struct gfs2_sbd *sdp = ip->i_sbd;
1335 struct gfs2_rgrp_list rlist;
1336 struct buffer_head *indbh, *dibh;
1337 uint64_t *eablk, *end;
1338 unsigned int rg_blocks = 0;
1339 uint64_t bstart = 0;
1340 unsigned int blen = 0;
1341 unsigned int blks = 0;
1345 memset(&rlist, 0, sizeof(struct gfs2_rgrp_list));
1347 error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr,
1348 DIO_START | DIO_WAIT, &indbh);
1352 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
1357 eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1358 end = eablk + sdp->sd_inptrs;
1360 for (; eablk < end; eablk++) {
1365 bn = be64_to_cpu(*eablk);
1367 if (bstart + blen == bn)
1371 gfs2_rlist_add(sdp, &rlist, bstart);
1378 gfs2_rlist_add(sdp, &rlist, bstart);
1382 gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE, 0);
1384 for (x = 0; x < rlist.rl_rgrps; x++) {
1385 struct gfs2_rgrpd *rgd;
1386 rgd = rlist.rl_ghs[x].gh_gl->gl_object;
1387 rg_blocks += rgd->rd_ri.ri_length;
1390 error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs);
1392 goto out_rlist_free;
1394 error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE +
1395 RES_INDIRECT + RES_STATFS +
1400 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
1402 eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1406 for (; eablk < end; eablk++) {
1411 bn = be64_to_cpu(*eablk);
1413 if (bstart + blen == bn)
1417 gfs2_free_meta(ip, bstart, blen);
1423 if (!ip->i_di.di_blocks)
1424 gfs2_consist_inode(ip);
1425 ip->i_di.di_blocks--;
1428 gfs2_free_meta(ip, bstart, blen);
1430 ip->i_di.di_flags &= ~GFS2_DIF_EA_INDIRECT;
1432 error = gfs2_meta_inode_buffer(ip, &dibh);
1434 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1435 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1439 gfs2_trans_end(sdp);
1442 gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs);
1445 gfs2_rlist_free(&rlist);
1453 static int ea_dealloc_block(struct gfs2_inode *ip)
1455 struct gfs2_sbd *sdp = ip->i_sbd;
1456 struct gfs2_alloc *al = &ip->i_alloc;
1457 struct gfs2_rgrpd *rgd;
1458 struct buffer_head *dibh;
1461 rgd = gfs2_blk2rgrpd(sdp, ip->i_di.di_eattr);
1463 gfs2_consist_inode(ip);
1467 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0,
1472 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE +
1473 RES_STATFS + RES_QUOTA, 1);
1477 gfs2_free_meta(ip, ip->i_di.di_eattr, 1);
1479 ip->i_di.di_eattr = 0;
1480 if (!ip->i_di.di_blocks)
1481 gfs2_consist_inode(ip);
1482 ip->i_di.di_blocks--;
1484 error = gfs2_meta_inode_buffer(ip, &dibh);
1486 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1487 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1491 gfs2_trans_end(sdp);
1494 gfs2_glock_dq_uninit(&al->al_rgd_gh);
1500 * gfs2_ea_dealloc - deallocate the extended attribute fork
1506 int gfs2_ea_dealloc(struct gfs2_inode *ip)
1508 struct gfs2_alloc *al;
1511 al = gfs2_alloc_get(ip);
1513 error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
1517 error = gfs2_rindex_hold(ip->i_sbd, &al->al_ri_gh);
1521 error = ea_foreach(ip, ea_dealloc_unstuffed, NULL);
1525 if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) {
1526 error = ea_dealloc_indirect(ip);
1531 error = ea_dealloc_block(ip);
1534 gfs2_glock_dq_uninit(&al->al_ri_gh);
1537 gfs2_quota_unhold(ip);