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/slab.h>
11 #include <linux/spinlock.h>
12 #include <linux/completion.h>
13 #include <linux/buffer_head.h>
14 #include <linux/xattr.h>
15 #include <linux/gfs2_ondisk.h>
16 #include <asm/uaccess.h>
31 * ea_calc_size - returns the acutal number of bytes the request will take up
32 * (not counting any unstuffed data blocks)
37 * Returns: 1 if the EA should be stuffed
40 static int ea_calc_size(struct gfs2_sbd *sdp, unsigned int nsize, size_t dsize,
43 unsigned int jbsize = sdp->sd_jbsize;
46 *size = ALIGN(sizeof(struct gfs2_ea_header) + nsize + dsize, 8);
52 *size = ALIGN(sizeof(struct gfs2_ea_header) + nsize +
53 (sizeof(__be64) * DIV_ROUND_UP(dsize, jbsize)), 8);
58 static int ea_check_size(struct gfs2_sbd *sdp, unsigned int nsize, size_t dsize)
62 if (dsize > GFS2_EA_MAX_DATA_LEN)
65 ea_calc_size(sdp, nsize, dsize, &size);
67 /* This can only happen with 512 byte blocks */
68 if (size > sdp->sd_jbsize)
74 typedef int (*ea_call_t) (struct gfs2_inode *ip, struct buffer_head *bh,
75 struct gfs2_ea_header *ea,
76 struct gfs2_ea_header *prev, void *private);
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(GFS2_SB(&ip->i_inode), 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 && (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;
121 error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, &bh);
125 if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT)) {
126 error = ea_foreach_i(ip, bh, ea_call, data);
130 if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_IN)) {
135 eablk = (__be64 *)(bh->b_data + sizeof(struct gfs2_meta_header));
136 end = eablk + GFS2_SB(&ip->i_inode)->sd_inptrs;
138 for (; eablk < end; eablk++) {
143 bn = be64_to_cpu(*eablk);
145 error = gfs2_meta_read(ip->i_gl, bn, DIO_WAIT, &eabh);
148 error = ea_foreach_i(ip, eabh, ea_call, data);
162 struct gfs2_ea_location *ef_el;
165 static int ea_find_i(struct gfs2_inode *ip, struct buffer_head *bh,
166 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
169 struct ea_find *ef = private;
171 if (ea->ea_type == GFS2_EATYPE_UNUSED)
174 if (ea->ea_type == ef->type) {
175 if (ea->ea_name_len == ef->namel &&
176 !memcmp(GFS2_EA2NAME(ea), ef->name, ea->ea_name_len)) {
177 struct gfs2_ea_location *el = ef->ef_el;
189 static int gfs2_ea_find(struct gfs2_inode *ip, int type, const char *name,
190 struct gfs2_ea_location *el)
197 ef.namel = strlen(name);
200 memset(el, 0, sizeof(struct gfs2_ea_location));
202 error = ea_foreach(ip, ea_find_i, &ef);
210 * ea_dealloc_unstuffed -
217 * Take advantage of the fact that all unstuffed blocks are
218 * allocated from the same RG. But watch, this may not always
224 static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
225 struct gfs2_ea_header *ea,
226 struct gfs2_ea_header *prev, void *private)
228 int *leave = private;
229 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
230 struct gfs2_rgrpd *rgd;
231 struct gfs2_holder rg_gh;
232 struct buffer_head *dibh;
236 unsigned int blen = 0;
237 unsigned int blks = 0;
241 error = gfs2_rindex_update(sdp);
245 if (GFS2_EA_IS_STUFFED(ea))
248 dataptrs = GFS2_EA2DATAPTRS(ea);
249 for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {
252 bn = be64_to_cpu(*dataptrs);
258 rgd = gfs2_blk2rgrpd(sdp, bn, 1);
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_length + RES_DINODE +
269 RES_EATTR + RES_STATFS + RES_QUOTA, blks);
273 gfs2_trans_add_bh(ip->i_gl, bh, 1);
275 dataptrs = GFS2_EA2DATAPTRS(ea);
276 for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {
279 bn = be64_to_cpu(*dataptrs);
281 if (bstart + blen == bn)
285 gfs2_free_meta(ip, bstart, blen);
291 gfs2_add_inode_blocks(&ip->i_inode, -1);
294 gfs2_free_meta(ip, bstart, blen);
296 if (prev && !leave) {
299 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
300 prev->ea_rec_len = cpu_to_be32(len);
302 if (GFS2_EA_IS_LAST(ea))
303 prev->ea_flags |= GFS2_EAFLAG_LAST;
305 ea->ea_type = GFS2_EATYPE_UNUSED;
309 error = gfs2_meta_inode_buffer(ip, &dibh);
311 ip->i_inode.i_ctime = CURRENT_TIME;
312 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
313 gfs2_dinode_out(ip, dibh->b_data);
320 gfs2_glock_dq_uninit(&rg_gh);
324 static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
325 struct gfs2_ea_header *ea,
326 struct gfs2_ea_header *prev, int leave)
330 error = gfs2_rindex_update(GFS2_SB(&ip->i_inode));
334 error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
338 error = ea_dealloc_unstuffed(ip, bh, ea, prev, (leave) ? &error : NULL);
340 gfs2_quota_unhold(ip);
346 struct gfs2_ea_request *ei_er;
347 unsigned int ei_size;
350 static inline unsigned int gfs2_ea_strlen(struct gfs2_ea_header *ea)
352 switch (ea->ea_type) {
353 case GFS2_EATYPE_USR:
354 return 5 + ea->ea_name_len + 1;
355 case GFS2_EATYPE_SYS:
356 return 7 + ea->ea_name_len + 1;
357 case GFS2_EATYPE_SECURITY:
358 return 9 + ea->ea_name_len + 1;
364 static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh,
365 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
368 struct ea_list *ei = private;
369 struct gfs2_ea_request *er = ei->ei_er;
370 unsigned int ea_size = gfs2_ea_strlen(ea);
372 if (ea->ea_type == GFS2_EATYPE_UNUSED)
375 if (er->er_data_len) {
380 if (ei->ei_size + ea_size > er->er_data_len)
383 switch (ea->ea_type) {
384 case GFS2_EATYPE_USR:
388 case GFS2_EATYPE_SYS:
392 case GFS2_EATYPE_SECURITY:
393 prefix = "security.";
400 memcpy(er->er_data + ei->ei_size, prefix, l);
401 memcpy(er->er_data + ei->ei_size + l, GFS2_EA2NAME(ea),
403 memcpy(er->er_data + ei->ei_size + ea_size - 1, &c, 1);
406 ei->ei_size += ea_size;
412 * gfs2_listxattr - List gfs2 extended attributes
413 * @dentry: The dentry whose inode we are interested in
414 * @buffer: The buffer to write the results
415 * @size: The size of the buffer
417 * Returns: actual size of data on success, -errno on error
420 ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size)
422 struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
423 struct gfs2_ea_request er;
424 struct gfs2_holder i_gh;
427 memset(&er, 0, sizeof(struct gfs2_ea_request));
430 er.er_data_len = size;
433 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
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
453 * @ip: The GFS2 inode
454 * @ea: The extended attribute header structure
455 * @data: The data to be copied
460 static int ea_get_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
463 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
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 __be64 *dataptrs = GFS2_EA2DATAPTRS(ea);
471 bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_NOFS);
475 for (x = 0; x < nptrs; x++) {
476 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0,
486 for (x = 0; x < nptrs; x++) {
487 error = gfs2_meta_wait(sdp, bh[x]);
489 for (; x < nptrs; x++)
493 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
494 for (; x < nptrs; x++)
500 memcpy(data, bh[x]->b_data + sizeof(struct gfs2_meta_header),
501 (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
503 amount -= sdp->sd_jbsize;
504 data += sdp->sd_jbsize;
514 static int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
515 char *data, size_t size)
518 size_t len = GFS2_EA_DATA_LEN(el->el_ea);
522 if (GFS2_EA_IS_STUFFED(el->el_ea)) {
523 memcpy(data, GFS2_EA2DATA(el->el_ea), len);
526 ret = ea_get_unstuffed(ip, el->el_ea, data);
532 int gfs2_xattr_acl_get(struct gfs2_inode *ip, const char *name, char **ppdata)
534 struct gfs2_ea_location el;
539 error = gfs2_ea_find(ip, GFS2_EATYPE_SYS, name, &el);
544 if (!GFS2_EA_DATA_LEN(el.el_ea))
547 len = GFS2_EA_DATA_LEN(el.el_ea);
548 data = kmalloc(len, GFP_NOFS);
553 error = gfs2_ea_get_copy(ip, &el, data, len);
564 * gfs2_xattr_get - Get a GFS2 extended attribute
566 * @name: The name of the extended attribute
567 * @buffer: The buffer to write the result into
568 * @size: The size of the buffer
569 * @type: The type of extended attribute
571 * Returns: actual size of data on success, -errno on error
573 static int gfs2_xattr_get(struct dentry *dentry, const char *name,
574 void *buffer, size_t size, int type)
576 struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
577 struct gfs2_ea_location el;
582 if (strlen(name) > GFS2_EA_MAX_NAME_LEN)
585 error = gfs2_ea_find(ip, type, name, &el);
591 error = gfs2_ea_get_copy(ip, &el, buffer, size);
593 error = GFS2_EA_DATA_LEN(el.el_ea);
600 * ea_alloc_blk - allocates a new block for extended attributes.
601 * @ip: A pointer to the inode that's getting extended attributes
602 * @bhp: Pointer to pointer to a struct buffer_head
607 static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp)
609 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
610 struct gfs2_ea_header *ea;
615 error = gfs2_alloc_blocks(ip, &block, &n, 0, NULL);
618 gfs2_trans_add_unrevoke(sdp, block, 1);
619 *bhp = gfs2_meta_new(ip->i_gl, block);
620 gfs2_trans_add_bh(ip->i_gl, *bhp, 1);
621 gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
622 gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header));
624 ea = GFS2_EA_BH2FIRST(*bhp);
625 ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
626 ea->ea_type = GFS2_EATYPE_UNUSED;
627 ea->ea_flags = GFS2_EAFLAG_LAST;
630 gfs2_add_inode_blocks(&ip->i_inode, 1);
636 * ea_write - writes the request info to an ea, creating new blocks if
638 * @ip: inode that is being modified
639 * @ea: the location of the new ea in a block
640 * @er: the write request
642 * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags
647 static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
648 struct gfs2_ea_request *er)
650 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
653 ea->ea_data_len = cpu_to_be32(er->er_data_len);
654 ea->ea_name_len = er->er_name_len;
655 ea->ea_type = er->er_type;
658 memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len);
660 if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) {
662 memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len);
664 __be64 *dataptr = GFS2_EA2DATAPTRS(ea);
665 const char *data = er->er_data;
666 unsigned int data_len = er->er_data_len;
670 ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize);
671 for (x = 0; x < ea->ea_num_ptrs; x++) {
672 struct buffer_head *bh;
674 int mh_size = sizeof(struct gfs2_meta_header);
677 error = gfs2_alloc_blocks(ip, &block, &n, 0, NULL);
680 gfs2_trans_add_unrevoke(sdp, block, 1);
681 bh = gfs2_meta_new(ip->i_gl, block);
682 gfs2_trans_add_bh(ip->i_gl, bh, 1);
683 gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED);
685 gfs2_add_inode_blocks(&ip->i_inode, 1);
687 copy = data_len > sdp->sd_jbsize ? sdp->sd_jbsize :
689 memcpy(bh->b_data + mh_size, data, copy);
690 if (copy < sdp->sd_jbsize)
691 memset(bh->b_data + mh_size + copy, 0,
692 sdp->sd_jbsize - copy);
694 *dataptr++ = cpu_to_be64(bh->b_blocknr);
701 gfs2_assert_withdraw(sdp, !data_len);
707 typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip,
708 struct gfs2_ea_request *er, void *private);
710 static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er,
712 ea_skeleton_call_t skeleton_call, void *private)
714 struct buffer_head *dibh;
717 error = gfs2_rindex_update(GFS2_SB(&ip->i_inode));
721 error = gfs2_quota_lock_check(ip);
725 error = gfs2_inplace_reserve(ip, blks);
729 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode),
730 blks + gfs2_rg_blocks(ip) +
731 RES_DINODE + RES_STATFS + RES_QUOTA, 0);
735 error = skeleton_call(ip, er, private);
739 error = gfs2_meta_inode_buffer(ip, &dibh);
741 ip->i_inode.i_ctime = CURRENT_TIME;
742 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
743 gfs2_dinode_out(ip, dibh->b_data);
748 gfs2_trans_end(GFS2_SB(&ip->i_inode));
750 gfs2_inplace_release(ip);
752 gfs2_quota_unlock(ip);
756 static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
759 struct buffer_head *bh;
762 error = ea_alloc_blk(ip, &bh);
766 ip->i_eattr = bh->b_blocknr;
767 error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er);
775 * ea_init - initializes a new eattr block
782 static int ea_init(struct gfs2_inode *ip, int type, const char *name,
783 const void *data, size_t size)
785 struct gfs2_ea_request er;
786 unsigned int jbsize = GFS2_SB(&ip->i_inode)->sd_jbsize;
787 unsigned int blks = 1;
791 er.er_name_len = strlen(name);
792 er.er_data = (void *)data;
793 er.er_data_len = size;
795 if (GFS2_EAREQ_SIZE_STUFFED(&er) > jbsize)
796 blks += DIV_ROUND_UP(er.er_data_len, jbsize);
798 return ea_alloc_skeleton(ip, &er, blks, ea_init_i, NULL);
801 static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea)
803 u32 ea_size = GFS2_EA_SIZE(ea);
804 struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea +
806 u32 new_size = GFS2_EA_REC_LEN(ea) - ea_size;
807 int last = ea->ea_flags & GFS2_EAFLAG_LAST;
809 ea->ea_rec_len = cpu_to_be32(ea_size);
810 ea->ea_flags ^= last;
812 new->ea_rec_len = cpu_to_be32(new_size);
813 new->ea_flags = last;
818 static void ea_set_remove_stuffed(struct gfs2_inode *ip,
819 struct gfs2_ea_location *el)
821 struct gfs2_ea_header *ea = el->el_ea;
822 struct gfs2_ea_header *prev = el->el_prev;
825 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
827 if (!prev || !GFS2_EA_IS_STUFFED(ea)) {
828 ea->ea_type = GFS2_EATYPE_UNUSED;
830 } else if (GFS2_EA2NEXT(prev) != ea) {
831 prev = GFS2_EA2NEXT(prev);
832 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), GFS2_EA2NEXT(prev) == ea);
835 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
836 prev->ea_rec_len = cpu_to_be32(len);
838 if (GFS2_EA_IS_LAST(ea))
839 prev->ea_flags |= GFS2_EAFLAG_LAST;
845 struct gfs2_ea_request *es_er;
846 struct gfs2_ea_location *es_el;
848 struct buffer_head *es_bh;
849 struct gfs2_ea_header *es_ea;
852 static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh,
853 struct gfs2_ea_header *ea, struct ea_set *es)
855 struct gfs2_ea_request *er = es->es_er;
856 struct buffer_head *dibh;
859 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + 2 * RES_EATTR, 0);
863 gfs2_trans_add_bh(ip->i_gl, bh, 1);
866 ea = ea_split_ea(ea);
868 ea_write(ip, ea, er);
871 ea_set_remove_stuffed(ip, es->es_el);
873 error = gfs2_meta_inode_buffer(ip, &dibh);
876 ip->i_inode.i_ctime = CURRENT_TIME;
877 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
878 gfs2_dinode_out(ip, dibh->b_data);
881 gfs2_trans_end(GFS2_SB(&ip->i_inode));
885 static int ea_set_simple_alloc(struct gfs2_inode *ip,
886 struct gfs2_ea_request *er, void *private)
888 struct ea_set *es = private;
889 struct gfs2_ea_header *ea = es->es_ea;
892 gfs2_trans_add_bh(ip->i_gl, es->es_bh, 1);
895 ea = ea_split_ea(ea);
897 error = ea_write(ip, ea, er);
902 ea_set_remove_stuffed(ip, es->es_el);
907 static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh,
908 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
911 struct ea_set *es = private;
916 stuffed = ea_calc_size(GFS2_SB(&ip->i_inode), es->es_er->er_name_len,
917 es->es_er->er_data_len, &size);
919 if (ea->ea_type == GFS2_EATYPE_UNUSED) {
920 if (GFS2_EA_REC_LEN(ea) < size)
922 if (!GFS2_EA_IS_STUFFED(ea)) {
923 error = ea_remove_unstuffed(ip, bh, ea, prev, 1);
928 } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size)
934 error = ea_set_simple_noalloc(ip, bh, ea, es);
942 blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len,
943 GFS2_SB(&ip->i_inode)->sd_jbsize);
945 error = ea_alloc_skeleton(ip, es->es_er, blks,
946 ea_set_simple_alloc, es);
954 static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er,
957 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
958 struct buffer_head *indbh, *newbh;
961 int mh_size = sizeof(struct gfs2_meta_header);
963 if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) {
966 error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT,
971 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
976 eablk = (__be64 *)(indbh->b_data + mh_size);
977 end = eablk + sdp->sd_inptrs;
979 for (; eablk < end; eablk++)
988 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
992 error = gfs2_alloc_blocks(ip, &blk, &n, 0, NULL);
995 gfs2_trans_add_unrevoke(sdp, blk, 1);
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 = (__be64 *)(indbh->b_data + mh_size);
1002 *eablk = cpu_to_be64(ip->i_eattr);
1004 ip->i_diskflags |= GFS2_DIF_EA_INDIRECT;
1005 gfs2_add_inode_blocks(&ip->i_inode, 1);
1010 error = ea_alloc_blk(ip, &newbh);
1014 *eablk = cpu_to_be64((u64)newbh->b_blocknr);
1015 error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er);
1021 ea_set_remove_stuffed(ip, private);
1028 static int ea_set_i(struct gfs2_inode *ip, int type, const char *name,
1029 const void *value, size_t size, struct gfs2_ea_location *el)
1031 struct gfs2_ea_request er;
1033 unsigned int blks = 2;
1038 er.er_data = (void *)value;
1039 er.er_name_len = strlen(name);
1040 er.er_data_len = size;
1042 memset(&es, 0, sizeof(struct ea_set));
1046 error = ea_foreach(ip, ea_set_simple, &es);
1052 if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT))
1054 if (GFS2_EAREQ_SIZE_STUFFED(&er) > GFS2_SB(&ip->i_inode)->sd_jbsize)
1055 blks += DIV_ROUND_UP(er.er_data_len, GFS2_SB(&ip->i_inode)->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(GFS2_SB(&ip->i_inode),
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 static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el)
1074 struct gfs2_ea_header *ea = el->el_ea;
1075 struct gfs2_ea_header *prev = el->el_prev;
1076 struct buffer_head *dibh;
1079 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0);
1083 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
1088 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
1089 prev->ea_rec_len = cpu_to_be32(len);
1091 if (GFS2_EA_IS_LAST(ea))
1092 prev->ea_flags |= GFS2_EAFLAG_LAST;
1094 ea->ea_type = GFS2_EATYPE_UNUSED;
1097 error = gfs2_meta_inode_buffer(ip, &dibh);
1099 ip->i_inode.i_ctime = CURRENT_TIME;
1100 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1101 gfs2_dinode_out(ip, dibh->b_data);
1105 gfs2_trans_end(GFS2_SB(&ip->i_inode));
1111 * gfs2_xattr_remove - Remove a GFS2 extended attribute
1113 * @type: The type of the extended attribute
1114 * @name: The name of the extended attribute
1116 * This is not called directly by the VFS since we use the (common)
1117 * scheme of making a "set with NULL data" mean a remove request. Note
1118 * that this is different from a set with zero length data.
1120 * Returns: 0, or errno on failure
1123 static int gfs2_xattr_remove(struct gfs2_inode *ip, int type, const char *name)
1125 struct gfs2_ea_location el;
1131 error = gfs2_ea_find(ip, type, name, &el);
1137 if (GFS2_EA_IS_STUFFED(el.el_ea))
1138 error = ea_remove_stuffed(ip, &el);
1140 error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev, 0);
1148 * __gfs2_xattr_set - Set (or remove) a GFS2 extended attribute
1150 * @name: The name of the extended attribute
1151 * @value: The value of the extended attribute (NULL for remove)
1152 * @size: The size of the @value argument
1153 * @flags: Create or Replace
1154 * @type: The type of the extended attribute
1156 * See gfs2_xattr_remove() for details of the removal of xattrs.
1158 * Returns: 0 or errno on failure
1161 int __gfs2_xattr_set(struct inode *inode, const char *name,
1162 const void *value, size_t size, int flags, int type)
1164 struct gfs2_inode *ip = GFS2_I(inode);
1165 struct gfs2_sbd *sdp = GFS2_SB(inode);
1166 struct gfs2_ea_location el;
1167 unsigned int namel = strlen(name);
1170 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
1172 if (namel > GFS2_EA_MAX_NAME_LEN)
1176 return gfs2_xattr_remove(ip, type, name);
1178 if (ea_check_size(sdp, namel, size))
1182 if (flags & XATTR_REPLACE)
1184 return ea_init(ip, type, name, value, size);
1187 error = gfs2_ea_find(ip, type, name, &el);
1192 if (ip->i_diskflags & GFS2_DIF_APPENDONLY) {
1198 if (!(flags & XATTR_CREATE)) {
1199 int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea);
1200 error = ea_set_i(ip, type, name, value, size, &el);
1201 if (!error && unstuffed)
1202 ea_set_remove_unstuffed(ip, &el);
1210 if (!(flags & XATTR_REPLACE))
1211 error = ea_set_i(ip, type, name, value, size, NULL);
1216 static int gfs2_xattr_set(struct dentry *dentry, const char *name,
1217 const void *value, size_t size, int flags, int type)
1219 return __gfs2_xattr_set(dentry->d_inode, name, value,
1223 static int ea_acl_chmod_unstuffed(struct gfs2_inode *ip,
1224 struct gfs2_ea_header *ea, char *data)
1226 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1227 struct buffer_head **bh;
1228 unsigned int amount = GFS2_EA_DATA_LEN(ea);
1229 unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
1230 __be64 *dataptrs = GFS2_EA2DATAPTRS(ea);
1234 bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_NOFS);
1238 error = gfs2_trans_begin(sdp, nptrs + RES_DINODE, 0);
1242 for (x = 0; x < nptrs; x++) {
1243 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0,
1253 for (x = 0; x < nptrs; x++) {
1254 error = gfs2_meta_wait(sdp, bh[x]);
1256 for (; x < nptrs; x++)
1260 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
1261 for (; x < nptrs; x++)
1267 gfs2_trans_add_bh(ip->i_gl, bh[x], 1);
1269 memcpy(bh[x]->b_data + sizeof(struct gfs2_meta_header), data,
1270 (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
1272 amount -= sdp->sd_jbsize;
1273 data += sdp->sd_jbsize;
1283 gfs2_trans_end(sdp);
1288 int gfs2_xattr_acl_chmod(struct gfs2_inode *ip, struct iattr *attr, char *data)
1290 struct inode *inode = &ip->i_inode;
1291 struct gfs2_sbd *sdp = GFS2_SB(inode);
1292 struct gfs2_ea_location el;
1295 error = gfs2_ea_find(ip, GFS2_EATYPE_SYS, GFS2_POSIX_ACL_ACCESS, &el);
1299 if (GFS2_EA_IS_STUFFED(el.el_ea)) {
1300 error = gfs2_trans_begin(sdp, RES_DINODE + RES_EATTR, 0);
1302 gfs2_trans_add_bh(ip->i_gl, el.el_bh, 1);
1303 memcpy(GFS2_EA2DATA(el.el_ea), data,
1304 GFS2_EA_DATA_LEN(el.el_ea));
1307 error = ea_acl_chmod_unstuffed(ip, el.el_ea, data);
1314 error = gfs2_setattr_simple(inode, attr);
1315 gfs2_trans_end(sdp);
1319 static int ea_dealloc_indirect(struct gfs2_inode *ip)
1321 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1322 struct gfs2_rgrp_list rlist;
1323 struct buffer_head *indbh, *dibh;
1324 __be64 *eablk, *end;
1325 unsigned int rg_blocks = 0;
1327 unsigned int blen = 0;
1328 unsigned int blks = 0;
1332 error = gfs2_rindex_update(sdp);
1336 memset(&rlist, 0, sizeof(struct gfs2_rgrp_list));
1338 error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, &indbh);
1342 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
1347 eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1348 end = eablk + sdp->sd_inptrs;
1350 for (; eablk < end; eablk++) {
1355 bn = be64_to_cpu(*eablk);
1357 if (bstart + blen == bn)
1361 gfs2_rlist_add(ip, &rlist, bstart);
1368 gfs2_rlist_add(ip, &rlist, bstart);
1372 gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE);
1374 for (x = 0; x < rlist.rl_rgrps; x++) {
1375 struct gfs2_rgrpd *rgd;
1376 rgd = rlist.rl_ghs[x].gh_gl->gl_object;
1377 rg_blocks += rgd->rd_length;
1380 error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs);
1382 goto out_rlist_free;
1384 error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE + RES_INDIRECT +
1385 RES_STATFS + RES_QUOTA, blks);
1389 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
1391 eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1395 for (; eablk < end; eablk++) {
1400 bn = be64_to_cpu(*eablk);
1402 if (bstart + blen == bn)
1406 gfs2_free_meta(ip, bstart, blen);
1412 gfs2_add_inode_blocks(&ip->i_inode, -1);
1415 gfs2_free_meta(ip, bstart, blen);
1417 ip->i_diskflags &= ~GFS2_DIF_EA_INDIRECT;
1419 error = gfs2_meta_inode_buffer(ip, &dibh);
1421 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1422 gfs2_dinode_out(ip, dibh->b_data);
1426 gfs2_trans_end(sdp);
1429 gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs);
1431 gfs2_rlist_free(&rlist);
1437 static int ea_dealloc_block(struct gfs2_inode *ip)
1439 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1440 struct gfs2_rgrpd *rgd;
1441 struct buffer_head *dibh;
1442 struct gfs2_holder gh;
1445 error = gfs2_rindex_update(sdp);
1449 rgd = gfs2_blk2rgrpd(sdp, ip->i_eattr, 1);
1451 gfs2_consist_inode(ip);
1455 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &gh);
1459 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE + RES_STATFS +
1464 gfs2_free_meta(ip, ip->i_eattr, 1);
1467 gfs2_add_inode_blocks(&ip->i_inode, -1);
1469 error = gfs2_meta_inode_buffer(ip, &dibh);
1471 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1472 gfs2_dinode_out(ip, dibh->b_data);
1476 gfs2_trans_end(sdp);
1479 gfs2_glock_dq_uninit(&gh);
1484 * gfs2_ea_dealloc - deallocate the extended attribute fork
1490 int gfs2_ea_dealloc(struct gfs2_inode *ip)
1494 error = gfs2_rindex_update(GFS2_SB(&ip->i_inode));
1498 error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
1502 error = ea_foreach(ip, ea_dealloc_unstuffed, NULL);
1506 if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) {
1507 error = ea_dealloc_indirect(ip);
1512 error = ea_dealloc_block(ip);
1515 gfs2_quota_unhold(ip);
1519 static const struct xattr_handler gfs2_xattr_user_handler = {
1520 .prefix = XATTR_USER_PREFIX,
1521 .flags = GFS2_EATYPE_USR,
1522 .get = gfs2_xattr_get,
1523 .set = gfs2_xattr_set,
1526 static const struct xattr_handler gfs2_xattr_security_handler = {
1527 .prefix = XATTR_SECURITY_PREFIX,
1528 .flags = GFS2_EATYPE_SECURITY,
1529 .get = gfs2_xattr_get,
1530 .set = gfs2_xattr_set,
1533 const struct xattr_handler *gfs2_xattr_handlers[] = {
1534 &gfs2_xattr_user_handler,
1535 &gfs2_xattr_security_handler,
1536 &gfs2_xattr_system_handler,