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/xattr.h>
16 #include <linux/gfs2_ondisk.h>
17 #include <linux/lm_interface.h>
18 #include <asm/uaccess.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, struct buffer_head *bh,
72 struct gfs2_ea_header *ea,
73 struct gfs2_ea_header *prev, void *private);
75 static int ea_foreach_i(struct gfs2_inode *ip, struct buffer_head *bh,
76 ea_call_t ea_call, void *data)
78 struct gfs2_ea_header *ea, *prev = NULL;
81 if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_EA))
84 for (ea = GFS2_EA_BH2FIRST(bh);; prev = ea, ea = GFS2_EA2NEXT(ea)) {
85 if (!GFS2_EA_REC_LEN(ea))
87 if (!(bh->b_data <= (char *)ea && (char *)GFS2_EA2NEXT(ea) <=
88 bh->b_data + bh->b_size))
90 if (!GFS2_EATYPE_VALID(ea->ea_type))
93 error = ea_call(ip, bh, ea, prev, data);
97 if (GFS2_EA_IS_LAST(ea)) {
98 if ((char *)GFS2_EA2NEXT(ea) !=
99 bh->b_data + bh->b_size)
108 gfs2_consist_inode(ip);
112 static int ea_foreach(struct gfs2_inode *ip, ea_call_t ea_call, void *data)
114 struct buffer_head *bh, *eabh;
118 error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr, DIO_WAIT, &bh);
122 if (!(ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT)) {
123 error = ea_foreach_i(ip, bh, ea_call, data);
127 if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_IN)) {
132 eablk = (__be64 *)(bh->b_data + sizeof(struct gfs2_meta_header));
133 end = eablk + GFS2_SB(&ip->i_inode)->sd_inptrs;
135 for (; eablk < end; eablk++) {
140 bn = be64_to_cpu(*eablk);
142 error = gfs2_meta_read(ip->i_gl, bn, DIO_WAIT, &eabh);
145 error = ea_foreach_i(ip, eabh, ea_call, data);
156 struct gfs2_ea_request *ef_er;
157 struct gfs2_ea_location *ef_el;
160 static int ea_find_i(struct gfs2_inode *ip, struct buffer_head *bh,
161 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
164 struct ea_find *ef = private;
165 struct gfs2_ea_request *er = ef->ef_er;
167 if (ea->ea_type == GFS2_EATYPE_UNUSED)
170 if (ea->ea_type == er->er_type) {
171 if (ea->ea_name_len == er->er_name_len &&
172 !memcmp(GFS2_EA2NAME(ea), er->er_name, ea->ea_name_len)) {
173 struct gfs2_ea_location *el = ef->ef_el;
185 int gfs2_ea_find(struct gfs2_inode *ip, struct gfs2_ea_request *er,
186 struct gfs2_ea_location *el)
194 memset(el, 0, sizeof(struct gfs2_ea_location));
196 error = ea_foreach(ip, ea_find_i, &ef);
204 * ea_dealloc_unstuffed -
211 * Take advantage of the fact that all unstuffed blocks are
212 * allocated from the same RG. But watch, this may not always
218 static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
219 struct gfs2_ea_header *ea,
220 struct gfs2_ea_header *prev, void *private)
222 int *leave = private;
223 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
224 struct gfs2_rgrpd *rgd;
225 struct gfs2_holder rg_gh;
226 struct buffer_head *dibh;
230 unsigned int blen = 0;
231 unsigned int blks = 0;
235 if (GFS2_EA_IS_STUFFED(ea))
238 dataptrs = GFS2_EA2DATAPTRS(ea);
239 for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {
242 bn = be64_to_cpu(*dataptrs);
248 rgd = gfs2_blk2rgrpd(sdp, bn);
250 gfs2_consist_inode(ip);
254 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh);
258 error = gfs2_trans_begin(sdp, rgd->rd_ri.ri_length + RES_DINODE +
259 RES_EATTR + RES_STATFS + RES_QUOTA, blks);
263 gfs2_trans_add_bh(ip->i_gl, bh, 1);
265 dataptrs = GFS2_EA2DATAPTRS(ea);
266 for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {
269 bn = be64_to_cpu(*dataptrs);
271 if (bstart + blen == bn)
275 gfs2_free_meta(ip, bstart, blen);
281 if (!ip->i_di.di_blocks)
282 gfs2_consist_inode(ip);
283 ip->i_di.di_blocks--;
284 gfs2_set_inode_blocks(&ip->i_inode);
287 gfs2_free_meta(ip, bstart, blen);
289 if (prev && !leave) {
292 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
293 prev->ea_rec_len = cpu_to_be32(len);
295 if (GFS2_EA_IS_LAST(ea))
296 prev->ea_flags |= GFS2_EAFLAG_LAST;
298 ea->ea_type = GFS2_EATYPE_UNUSED;
302 error = gfs2_meta_inode_buffer(ip, &dibh);
304 ip->i_inode.i_ctime.tv_sec = get_seconds();
305 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
306 gfs2_dinode_out(ip, dibh->b_data);
313 gfs2_glock_dq_uninit(&rg_gh);
317 static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
318 struct gfs2_ea_header *ea,
319 struct gfs2_ea_header *prev, int leave)
321 struct gfs2_alloc *al;
324 al = gfs2_alloc_get(ip);
326 error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
330 error = gfs2_rindex_hold(GFS2_SB(&ip->i_inode), &al->al_ri_gh);
334 error = ea_dealloc_unstuffed(ip, bh, ea, prev, (leave) ? &error : NULL);
336 gfs2_glock_dq_uninit(&al->al_ri_gh);
339 gfs2_quota_unhold(ip);
346 struct gfs2_ea_request *ei_er;
347 unsigned int ei_size;
350 static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh,
351 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
354 struct ea_list *ei = private;
355 struct gfs2_ea_request *er = ei->ei_er;
356 unsigned int ea_size = gfs2_ea_strlen(ea);
358 if (ea->ea_type == GFS2_EATYPE_UNUSED)
361 if (er->er_data_len) {
366 if (ei->ei_size + ea_size > er->er_data_len)
369 switch (ea->ea_type) {
370 case GFS2_EATYPE_USR:
374 case GFS2_EATYPE_SYS:
378 case GFS2_EATYPE_SECURITY:
379 prefix = "security.";
386 memcpy(er->er_data + ei->ei_size, prefix, l);
387 memcpy(er->er_data + ei->ei_size + l, GFS2_EA2NAME(ea),
389 memcpy(er->er_data + ei->ei_size + ea_size - 1, &c, 1);
392 ei->ei_size += ea_size;
402 * Returns: actual size of data on success, -errno on error
405 int gfs2_ea_list(struct gfs2_inode *ip, struct gfs2_ea_request *er)
407 struct gfs2_holder i_gh;
410 if (!er->er_data || !er->er_data_len) {
415 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
419 if (ip->i_di.di_eattr) {
420 struct ea_list ei = { .ei_er = er, .ei_size = 0 };
422 error = ea_foreach(ip, ea_list_i, &ei);
427 gfs2_glock_dq_uninit(&i_gh);
433 * ea_get_unstuffed - actually copies the unstuffed data into the
435 * @ip: The GFS2 inode
436 * @ea: The extended attribute header structure
437 * @data: The data to be copied
442 static int ea_get_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
445 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
446 struct buffer_head **bh;
447 unsigned int amount = GFS2_EA_DATA_LEN(ea);
448 unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
449 __be64 *dataptrs = GFS2_EA2DATAPTRS(ea);
453 bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL);
457 for (x = 0; x < nptrs; x++) {
458 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0,
468 for (x = 0; x < nptrs; x++) {
469 error = gfs2_meta_wait(sdp, bh[x]);
471 for (; x < nptrs; x++)
475 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
476 for (; x < nptrs; x++)
482 memcpy(data, bh[x]->b_data + sizeof(struct gfs2_meta_header),
483 (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
485 amount -= sdp->sd_jbsize;
486 data += sdp->sd_jbsize;
496 int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
499 if (GFS2_EA_IS_STUFFED(el->el_ea)) {
500 memcpy(data, GFS2_EA2DATA(el->el_ea), GFS2_EA_DATA_LEN(el->el_ea));
503 return ea_get_unstuffed(ip, el->el_ea, data);
508 * @ip: The GFS2 inode
509 * @er: The request structure
511 * Returns: actual size of data on success, -errno on error
514 int gfs2_ea_get_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
516 struct gfs2_ea_location el;
519 if (!ip->i_di.di_eattr)
522 error = gfs2_ea_find(ip, er, &el);
528 if (er->er_data_len) {
529 if (GFS2_EA_DATA_LEN(el.el_ea) > er->er_data_len)
532 error = gfs2_ea_get_copy(ip, &el, er->er_data);
535 error = GFS2_EA_DATA_LEN(el.el_ea);
544 * @ip: The GFS2 inode
545 * @er: The request structure
547 * Returns: actual size of data on success, -errno on error
550 int gfs2_ea_get(struct gfs2_inode *ip, struct gfs2_ea_request *er)
552 struct gfs2_holder i_gh;
555 if (!er->er_name_len ||
556 er->er_name_len > GFS2_EA_MAX_NAME_LEN)
558 if (!er->er_data || !er->er_data_len) {
563 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
567 error = gfs2_ea_ops[er->er_type]->eo_get(ip, er);
569 gfs2_glock_dq_uninit(&i_gh);
575 * ea_alloc_blk - allocates a new block for extended attributes.
576 * @ip: A pointer to the inode that's getting extended attributes
577 * @bhp: Pointer to pointer to a struct buffer_head
582 static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp)
584 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
585 struct gfs2_ea_header *ea;
588 block = gfs2_alloc_meta(ip);
590 *bhp = gfs2_meta_new(ip->i_gl, block);
591 gfs2_trans_add_bh(ip->i_gl, *bhp, 1);
592 gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
593 gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header));
595 ea = GFS2_EA_BH2FIRST(*bhp);
596 ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
597 ea->ea_type = GFS2_EATYPE_UNUSED;
598 ea->ea_flags = GFS2_EAFLAG_LAST;
601 ip->i_di.di_blocks++;
602 gfs2_set_inode_blocks(&ip->i_inode);
608 * ea_write - writes the request info to an ea, creating new blocks if
610 * @ip: inode that is being modified
611 * @ea: the location of the new ea in a block
612 * @er: the write request
614 * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags
619 static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
620 struct gfs2_ea_request *er)
622 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
624 ea->ea_data_len = cpu_to_be32(er->er_data_len);
625 ea->ea_name_len = er->er_name_len;
626 ea->ea_type = er->er_type;
629 memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len);
631 if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) {
633 memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len);
635 __be64 *dataptr = GFS2_EA2DATAPTRS(ea);
636 const char *data = er->er_data;
637 unsigned int data_len = er->er_data_len;
641 ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize);
642 for (x = 0; x < ea->ea_num_ptrs; x++) {
643 struct buffer_head *bh;
645 int mh_size = sizeof(struct gfs2_meta_header);
647 block = gfs2_alloc_meta(ip);
649 bh = gfs2_meta_new(ip->i_gl, block);
650 gfs2_trans_add_bh(ip->i_gl, bh, 1);
651 gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED);
653 ip->i_di.di_blocks++;
654 gfs2_set_inode_blocks(&ip->i_inode);
656 copy = data_len > sdp->sd_jbsize ? sdp->sd_jbsize :
658 memcpy(bh->b_data + mh_size, data, copy);
659 if (copy < sdp->sd_jbsize)
660 memset(bh->b_data + mh_size + copy, 0,
661 sdp->sd_jbsize - copy);
663 *dataptr++ = cpu_to_be64(bh->b_blocknr);
670 gfs2_assert_withdraw(sdp, !data_len);
676 typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip,
677 struct gfs2_ea_request *er, void *private);
679 static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er,
681 ea_skeleton_call_t skeleton_call, void *private)
683 struct gfs2_alloc *al;
684 struct buffer_head *dibh;
687 al = gfs2_alloc_get(ip);
689 error = gfs2_quota_lock(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
693 error = gfs2_quota_check(ip, ip->i_inode.i_uid, ip->i_inode.i_gid);
697 al->al_requested = blks;
699 error = gfs2_inplace_reserve(ip);
703 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode),
704 blks + al->al_rgd->rd_ri.ri_length +
705 RES_DINODE + RES_STATFS + RES_QUOTA, 0);
709 error = skeleton_call(ip, er, private);
713 error = gfs2_meta_inode_buffer(ip, &dibh);
715 if (er->er_flags & GFS2_ERF_MODE) {
716 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode),
717 (ip->i_inode.i_mode & S_IFMT) ==
718 (er->er_mode & S_IFMT));
719 ip->i_inode.i_mode = er->er_mode;
721 ip->i_inode.i_ctime.tv_sec = get_seconds();
722 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
723 gfs2_dinode_out(ip, dibh->b_data);
728 gfs2_trans_end(GFS2_SB(&ip->i_inode));
730 gfs2_inplace_release(ip);
732 gfs2_quota_unlock(ip);
738 static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
741 struct buffer_head *bh;
744 error = ea_alloc_blk(ip, &bh);
748 ip->i_di.di_eattr = bh->b_blocknr;
749 error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er);
757 * ea_init - initializes a new eattr block
764 static int ea_init(struct gfs2_inode *ip, struct gfs2_ea_request *er)
766 unsigned int jbsize = GFS2_SB(&ip->i_inode)->sd_jbsize;
767 unsigned int blks = 1;
769 if (GFS2_EAREQ_SIZE_STUFFED(er) > jbsize)
770 blks += DIV_ROUND_UP(er->er_data_len, jbsize);
772 return ea_alloc_skeleton(ip, er, blks, ea_init_i, NULL);
775 static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea)
777 u32 ea_size = GFS2_EA_SIZE(ea);
778 struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea +
780 u32 new_size = GFS2_EA_REC_LEN(ea) - ea_size;
781 int last = ea->ea_flags & GFS2_EAFLAG_LAST;
783 ea->ea_rec_len = cpu_to_be32(ea_size);
784 ea->ea_flags ^= last;
786 new->ea_rec_len = cpu_to_be32(new_size);
787 new->ea_flags = last;
792 static void ea_set_remove_stuffed(struct gfs2_inode *ip,
793 struct gfs2_ea_location *el)
795 struct gfs2_ea_header *ea = el->el_ea;
796 struct gfs2_ea_header *prev = el->el_prev;
799 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
801 if (!prev || !GFS2_EA_IS_STUFFED(ea)) {
802 ea->ea_type = GFS2_EATYPE_UNUSED;
804 } else if (GFS2_EA2NEXT(prev) != ea) {
805 prev = GFS2_EA2NEXT(prev);
806 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), GFS2_EA2NEXT(prev) == ea);
809 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
810 prev->ea_rec_len = cpu_to_be32(len);
812 if (GFS2_EA_IS_LAST(ea))
813 prev->ea_flags |= GFS2_EAFLAG_LAST;
819 struct gfs2_ea_request *es_er;
820 struct gfs2_ea_location *es_el;
822 struct buffer_head *es_bh;
823 struct gfs2_ea_header *es_ea;
826 static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh,
827 struct gfs2_ea_header *ea, struct ea_set *es)
829 struct gfs2_ea_request *er = es->es_er;
830 struct buffer_head *dibh;
833 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + 2 * RES_EATTR, 0);
837 gfs2_trans_add_bh(ip->i_gl, bh, 1);
840 ea = ea_split_ea(ea);
842 ea_write(ip, ea, er);
845 ea_set_remove_stuffed(ip, es->es_el);
847 error = gfs2_meta_inode_buffer(ip, &dibh);
851 if (er->er_flags & GFS2_ERF_MODE) {
852 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode),
853 (ip->i_inode.i_mode & S_IFMT) == (er->er_mode & S_IFMT));
854 ip->i_inode.i_mode = er->er_mode;
856 ip->i_inode.i_ctime.tv_sec = get_seconds();
857 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
858 gfs2_dinode_out(ip, dibh->b_data);
861 gfs2_trans_end(GFS2_SB(&ip->i_inode));
865 static int ea_set_simple_alloc(struct gfs2_inode *ip,
866 struct gfs2_ea_request *er, void *private)
868 struct ea_set *es = private;
869 struct gfs2_ea_header *ea = es->es_ea;
872 gfs2_trans_add_bh(ip->i_gl, es->es_bh, 1);
875 ea = ea_split_ea(ea);
877 error = ea_write(ip, ea, er);
882 ea_set_remove_stuffed(ip, es->es_el);
887 static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh,
888 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
891 struct ea_set *es = private;
896 stuffed = ea_calc_size(GFS2_SB(&ip->i_inode), es->es_er, &size);
898 if (ea->ea_type == GFS2_EATYPE_UNUSED) {
899 if (GFS2_EA_REC_LEN(ea) < size)
901 if (!GFS2_EA_IS_STUFFED(ea)) {
902 error = ea_remove_unstuffed(ip, bh, ea, prev, 1);
907 } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size)
913 error = ea_set_simple_noalloc(ip, bh, ea, es);
921 blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len,
922 GFS2_SB(&ip->i_inode)->sd_jbsize);
924 error = ea_alloc_skeleton(ip, es->es_er, blks,
925 ea_set_simple_alloc, es);
933 static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er,
936 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
937 struct buffer_head *indbh, *newbh;
940 int mh_size = sizeof(struct gfs2_meta_header);
942 if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) {
945 error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr, DIO_WAIT,
950 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
955 eablk = (__be64 *)(indbh->b_data + mh_size);
956 end = eablk + sdp->sd_inptrs;
958 for (; eablk < end; eablk++)
967 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
971 blk = gfs2_alloc_meta(ip);
973 indbh = gfs2_meta_new(ip->i_gl, blk);
974 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
975 gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN);
976 gfs2_buffer_clear_tail(indbh, mh_size);
978 eablk = (__be64 *)(indbh->b_data + mh_size);
979 *eablk = cpu_to_be64(ip->i_di.di_eattr);
980 ip->i_di.di_eattr = blk;
981 ip->i_di.di_flags |= GFS2_DIF_EA_INDIRECT;
982 ip->i_di.di_blocks++;
983 gfs2_set_inode_blocks(&ip->i_inode);
988 error = ea_alloc_blk(ip, &newbh);
992 *eablk = cpu_to_be64((u64)newbh->b_blocknr);
993 error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er);
999 ea_set_remove_stuffed(ip, private);
1006 static int ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
1007 struct gfs2_ea_location *el)
1010 unsigned int blks = 2;
1013 memset(&es, 0, sizeof(struct ea_set));
1017 error = ea_foreach(ip, ea_set_simple, &es);
1023 if (!(ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT))
1025 if (GFS2_EAREQ_SIZE_STUFFED(er) > GFS2_SB(&ip->i_inode)->sd_jbsize)
1026 blks += DIV_ROUND_UP(er->er_data_len, GFS2_SB(&ip->i_inode)->sd_jbsize);
1028 return ea_alloc_skeleton(ip, er, blks, ea_set_block, el);
1031 static int ea_set_remove_unstuffed(struct gfs2_inode *ip,
1032 struct gfs2_ea_location *el)
1034 if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) {
1035 el->el_prev = GFS2_EA2NEXT(el->el_prev);
1036 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode),
1037 GFS2_EA2NEXT(el->el_prev) == el->el_ea);
1040 return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev,0);
1043 int gfs2_ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1045 struct gfs2_ea_location el;
1048 if (!ip->i_di.di_eattr) {
1049 if (er->er_flags & XATTR_REPLACE)
1051 return ea_init(ip, er);
1054 error = gfs2_ea_find(ip, er, &el);
1059 if (ip->i_di.di_flags & GFS2_DIF_APPENDONLY) {
1065 if (!(er->er_flags & XATTR_CREATE)) {
1066 int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea);
1067 error = ea_set_i(ip, er, &el);
1068 if (!error && unstuffed)
1069 ea_set_remove_unstuffed(ip, &el);
1075 if (!(er->er_flags & XATTR_REPLACE))
1076 error = ea_set_i(ip, er, NULL);
1082 int gfs2_ea_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1084 struct gfs2_holder i_gh;
1087 if (!er->er_name_len || er->er_name_len > GFS2_EA_MAX_NAME_LEN)
1089 if (!er->er_data || !er->er_data_len) {
1091 er->er_data_len = 0;
1093 error = ea_check_size(GFS2_SB(&ip->i_inode), er);
1097 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1101 if (IS_IMMUTABLE(&ip->i_inode))
1104 error = gfs2_ea_ops[er->er_type]->eo_set(ip, er);
1106 gfs2_glock_dq_uninit(&i_gh);
1111 static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el)
1113 struct gfs2_ea_header *ea = el->el_ea;
1114 struct gfs2_ea_header *prev = el->el_prev;
1115 struct buffer_head *dibh;
1118 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0);
1122 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
1127 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
1128 prev->ea_rec_len = cpu_to_be32(len);
1130 if (GFS2_EA_IS_LAST(ea))
1131 prev->ea_flags |= GFS2_EAFLAG_LAST;
1133 ea->ea_type = GFS2_EATYPE_UNUSED;
1135 error = gfs2_meta_inode_buffer(ip, &dibh);
1137 ip->i_inode.i_ctime.tv_sec = get_seconds();
1138 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1139 gfs2_dinode_out(ip, dibh->b_data);
1143 gfs2_trans_end(GFS2_SB(&ip->i_inode));
1148 int gfs2_ea_remove_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1150 struct gfs2_ea_location el;
1153 if (!ip->i_di.di_eattr)
1156 error = gfs2_ea_find(ip, er, &el);
1162 if (GFS2_EA_IS_STUFFED(el.el_ea))
1163 error = ea_remove_stuffed(ip, &el);
1165 error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev,
1174 * gfs2_ea_remove - sets (or creates or replaces) an extended attribute
1175 * @ip: pointer to the inode of the target file
1176 * @er: request information
1181 int gfs2_ea_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1183 struct gfs2_holder i_gh;
1186 if (!er->er_name_len || er->er_name_len > GFS2_EA_MAX_NAME_LEN)
1189 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1193 if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode))
1196 error = gfs2_ea_ops[er->er_type]->eo_remove(ip, er);
1198 gfs2_glock_dq_uninit(&i_gh);
1203 static int ea_acl_chmod_unstuffed(struct gfs2_inode *ip,
1204 struct gfs2_ea_header *ea, char *data)
1206 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1207 struct buffer_head **bh;
1208 unsigned int amount = GFS2_EA_DATA_LEN(ea);
1209 unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
1210 __be64 *dataptrs = GFS2_EA2DATAPTRS(ea);
1214 bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL);
1218 error = gfs2_trans_begin(sdp, nptrs + RES_DINODE, 0);
1222 for (x = 0; x < nptrs; x++) {
1223 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0,
1233 for (x = 0; x < nptrs; x++) {
1234 error = gfs2_meta_wait(sdp, bh[x]);
1236 for (; x < nptrs; x++)
1240 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
1241 for (; x < nptrs; x++)
1247 gfs2_trans_add_bh(ip->i_gl, bh[x], 1);
1249 memcpy(bh[x]->b_data + sizeof(struct gfs2_meta_header), data,
1250 (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
1252 amount -= sdp->sd_jbsize;
1253 data += sdp->sd_jbsize;
1263 gfs2_trans_end(sdp);
1268 int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el,
1269 struct iattr *attr, char *data)
1271 struct buffer_head *dibh;
1274 if (GFS2_EA_IS_STUFFED(el->el_ea)) {
1275 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0);
1279 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
1280 memcpy(GFS2_EA2DATA(el->el_ea), data,
1281 GFS2_EA_DATA_LEN(el->el_ea));
1283 error = ea_acl_chmod_unstuffed(ip, el->el_ea, data);
1288 error = gfs2_meta_inode_buffer(ip, &dibh);
1290 error = inode_setattr(&ip->i_inode, attr);
1291 gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error);
1292 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1293 gfs2_dinode_out(ip, dibh->b_data);
1297 gfs2_trans_end(GFS2_SB(&ip->i_inode));
1302 static int ea_dealloc_indirect(struct gfs2_inode *ip)
1304 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1305 struct gfs2_rgrp_list rlist;
1306 struct buffer_head *indbh, *dibh;
1307 __be64 *eablk, *end;
1308 unsigned int rg_blocks = 0;
1310 unsigned int blen = 0;
1311 unsigned int blks = 0;
1315 memset(&rlist, 0, sizeof(struct gfs2_rgrp_list));
1317 error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr, DIO_WAIT, &indbh);
1321 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
1326 eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1327 end = eablk + sdp->sd_inptrs;
1329 for (; eablk < end; eablk++) {
1334 bn = be64_to_cpu(*eablk);
1336 if (bstart + blen == bn)
1340 gfs2_rlist_add(sdp, &rlist, bstart);
1347 gfs2_rlist_add(sdp, &rlist, bstart);
1351 gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE, 0);
1353 for (x = 0; x < rlist.rl_rgrps; x++) {
1354 struct gfs2_rgrpd *rgd;
1355 rgd = rlist.rl_ghs[x].gh_gl->gl_object;
1356 rg_blocks += rgd->rd_ri.ri_length;
1359 error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs);
1361 goto out_rlist_free;
1363 error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE + RES_INDIRECT +
1364 RES_STATFS + RES_QUOTA, blks);
1368 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
1370 eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1374 for (; eablk < end; eablk++) {
1379 bn = be64_to_cpu(*eablk);
1381 if (bstart + blen == bn)
1385 gfs2_free_meta(ip, bstart, blen);
1391 if (!ip->i_di.di_blocks)
1392 gfs2_consist_inode(ip);
1393 ip->i_di.di_blocks--;
1394 gfs2_set_inode_blocks(&ip->i_inode);
1397 gfs2_free_meta(ip, bstart, blen);
1399 ip->i_di.di_flags &= ~GFS2_DIF_EA_INDIRECT;
1401 error = gfs2_meta_inode_buffer(ip, &dibh);
1403 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1404 gfs2_dinode_out(ip, dibh->b_data);
1408 gfs2_trans_end(sdp);
1411 gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs);
1413 gfs2_rlist_free(&rlist);
1419 static int ea_dealloc_block(struct gfs2_inode *ip)
1421 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1422 struct gfs2_alloc *al = &ip->i_alloc;
1423 struct gfs2_rgrpd *rgd;
1424 struct buffer_head *dibh;
1427 rgd = gfs2_blk2rgrpd(sdp, ip->i_di.di_eattr);
1429 gfs2_consist_inode(ip);
1433 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0,
1438 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE + RES_STATFS +
1443 gfs2_free_meta(ip, ip->i_di.di_eattr, 1);
1445 ip->i_di.di_eattr = 0;
1446 if (!ip->i_di.di_blocks)
1447 gfs2_consist_inode(ip);
1448 ip->i_di.di_blocks--;
1449 gfs2_set_inode_blocks(&ip->i_inode);
1451 error = gfs2_meta_inode_buffer(ip, &dibh);
1453 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1454 gfs2_dinode_out(ip, dibh->b_data);
1458 gfs2_trans_end(sdp);
1461 gfs2_glock_dq_uninit(&al->al_rgd_gh);
1466 * gfs2_ea_dealloc - deallocate the extended attribute fork
1472 int gfs2_ea_dealloc(struct gfs2_inode *ip)
1474 struct gfs2_alloc *al;
1477 al = gfs2_alloc_get(ip);
1479 error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
1483 error = gfs2_rindex_hold(GFS2_SB(&ip->i_inode), &al->al_ri_gh);
1487 error = ea_foreach(ip, ea_dealloc_unstuffed, NULL);
1491 if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) {
1492 error = ea_dealloc_indirect(ip);
1497 error = ea_dealloc_block(ip);
1500 gfs2_glock_dq_uninit(&al->al_ri_gh);
1502 gfs2_quota_unhold(ip);