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 <linux/posix_acl_xattr.h>
17 #include <asm/uaccess.h>
32 * ea_calc_size - returns the acutal number of bytes the request will take up
33 * (not counting any unstuffed data blocks)
38 * Returns: 1 if the EA should be stuffed
41 static int ea_calc_size(struct gfs2_sbd *sdp, unsigned int nsize, size_t dsize,
44 unsigned int jbsize = sdp->sd_jbsize;
47 *size = ALIGN(sizeof(struct gfs2_ea_header) + nsize + dsize, 8);
53 *size = ALIGN(sizeof(struct gfs2_ea_header) + nsize +
54 (sizeof(__be64) * DIV_ROUND_UP(dsize, jbsize)), 8);
59 static int ea_check_size(struct gfs2_sbd *sdp, unsigned int nsize, size_t dsize)
63 if (dsize > GFS2_EA_MAX_DATA_LEN)
66 ea_calc_size(sdp, nsize, dsize, &size);
68 /* This can only happen with 512 byte blocks */
69 if (size > sdp->sd_jbsize)
75 typedef int (*ea_call_t) (struct gfs2_inode *ip, struct buffer_head *bh,
76 struct gfs2_ea_header *ea,
77 struct gfs2_ea_header *prev, void *private);
79 static int ea_foreach_i(struct gfs2_inode *ip, struct buffer_head *bh,
80 ea_call_t ea_call, void *data)
82 struct gfs2_ea_header *ea, *prev = NULL;
85 if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_EA))
88 for (ea = GFS2_EA_BH2FIRST(bh);; prev = ea, ea = GFS2_EA2NEXT(ea)) {
89 if (!GFS2_EA_REC_LEN(ea))
91 if (!(bh->b_data <= (char *)ea && (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;
122 error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, 0, &bh);
126 if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT)) {
127 error = ea_foreach_i(ip, bh, ea_call, data);
131 if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_IN)) {
136 eablk = (__be64 *)(bh->b_data + sizeof(struct gfs2_meta_header));
137 end = eablk + GFS2_SB(&ip->i_inode)->sd_inptrs;
139 for (; eablk < end; eablk++) {
144 bn = be64_to_cpu(*eablk);
146 error = gfs2_meta_read(ip->i_gl, bn, DIO_WAIT, 0, &eabh);
149 error = ea_foreach_i(ip, eabh, ea_call, data);
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;
172 if (ea->ea_type == GFS2_EATYPE_UNUSED)
175 if (ea->ea_type == ef->type) {
176 if (ea->ea_name_len == ef->namel &&
177 !memcmp(GFS2_EA2NAME(ea), ef->name, ea->ea_name_len)) {
178 struct gfs2_ea_location *el = ef->ef_el;
190 static int gfs2_ea_find(struct gfs2_inode *ip, int type, const char *name,
191 struct gfs2_ea_location *el)
198 ef.namel = strlen(name);
201 memset(el, 0, sizeof(struct gfs2_ea_location));
203 error = ea_foreach(ip, ea_find_i, &ef);
211 * ea_dealloc_unstuffed -
218 * Take advantage of the fact that all unstuffed blocks are
219 * allocated from the same RG. But watch, this may not always
225 static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
226 struct gfs2_ea_header *ea,
227 struct gfs2_ea_header *prev, void *private)
229 int *leave = private;
230 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
231 struct gfs2_rgrpd *rgd;
232 struct gfs2_holder rg_gh;
233 struct buffer_head *dibh;
237 unsigned int blen = 0;
238 unsigned int blks = 0;
242 error = gfs2_rindex_update(sdp);
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);
259 rgd = gfs2_blk2rgrpd(sdp, bn, 1);
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_length + RES_DINODE +
270 RES_EATTR + RES_STATFS + RES_QUOTA, blks);
274 gfs2_trans_add_meta(ip->i_gl, bh);
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 gfs2_add_inode_blocks(&ip->i_inode, -1);
295 gfs2_free_meta(ip, bstart, blen);
297 if (prev && !leave) {
300 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
301 prev->ea_rec_len = cpu_to_be32(len);
303 if (GFS2_EA_IS_LAST(ea))
304 prev->ea_flags |= GFS2_EAFLAG_LAST;
306 ea->ea_type = GFS2_EATYPE_UNUSED;
310 error = gfs2_meta_inode_buffer(ip, &dibh);
312 ip->i_inode.i_ctime = CURRENT_TIME;
313 gfs2_trans_add_meta(ip->i_gl, dibh);
314 gfs2_dinode_out(ip, dibh->b_data);
321 gfs2_glock_dq_uninit(&rg_gh);
325 static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
326 struct gfs2_ea_header *ea,
327 struct gfs2_ea_header *prev, int leave)
331 error = gfs2_rindex_update(GFS2_SB(&ip->i_inode));
335 error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE);
339 error = ea_dealloc_unstuffed(ip, bh, ea, prev, (leave) ? &error : NULL);
341 gfs2_quota_unhold(ip);
347 struct gfs2_ea_request *ei_er;
348 unsigned int ei_size;
351 static inline unsigned int gfs2_ea_strlen(struct gfs2_ea_header *ea)
353 switch (ea->ea_type) {
354 case GFS2_EATYPE_USR:
355 return 5 + ea->ea_name_len + 1;
356 case GFS2_EATYPE_SYS:
357 return 7 + ea->ea_name_len + 1;
358 case GFS2_EATYPE_SECURITY:
359 return 9 + ea->ea_name_len + 1;
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.";
401 memcpy(er->er_data + ei->ei_size, prefix, l);
402 memcpy(er->er_data + ei->ei_size + l, GFS2_EA2NAME(ea),
404 memcpy(er->er_data + ei->ei_size + ea_size - 1, &c, 1);
407 ei->ei_size += ea_size;
413 * gfs2_listxattr - List gfs2 extended attributes
414 * @dentry: The dentry whose inode we are interested in
415 * @buffer: The buffer to write the results
416 * @size: The size of the buffer
418 * Returns: actual size of data on success, -errno on error
421 ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size)
423 struct gfs2_inode *ip = GFS2_I(d_inode(dentry));
424 struct gfs2_ea_request er;
425 struct gfs2_holder i_gh;
428 memset(&er, 0, sizeof(struct gfs2_ea_request));
431 er.er_data_len = size;
434 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
439 struct ea_list ei = { .ei_er = &er, .ei_size = 0 };
441 error = ea_foreach(ip, ea_list_i, &ei);
446 gfs2_glock_dq_uninit(&i_gh);
452 * ea_iter_unstuffed - copies the unstuffed xattr data to/from the
454 * @ip: The GFS2 inode
455 * @ea: The extended attribute header structure
456 * @din: The data to be copied in
457 * @dout: The data to be copied out (one of din,dout will be NULL)
462 static int gfs2_iter_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
463 const char *din, char *dout)
465 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
466 struct buffer_head **bh;
467 unsigned int amount = GFS2_EA_DATA_LEN(ea);
468 unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
469 __be64 *dataptrs = GFS2_EA2DATAPTRS(ea);
475 bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_NOFS);
479 for (x = 0; x < nptrs; x++) {
480 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0, 0,
490 for (x = 0; x < nptrs; x++) {
491 error = gfs2_meta_wait(sdp, bh[x]);
493 for (; x < nptrs; x++)
497 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
498 for (; x < nptrs; x++)
504 pos = bh[x]->b_data + sizeof(struct gfs2_meta_header);
505 cp_size = (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize;
508 memcpy(dout, pos, cp_size);
509 dout += sdp->sd_jbsize;
513 gfs2_trans_add_meta(ip->i_gl, bh[x]);
514 memcpy(pos, din, cp_size);
515 din += sdp->sd_jbsize;
518 amount -= sdp->sd_jbsize;
527 static int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
528 char *data, size_t size)
531 size_t len = GFS2_EA_DATA_LEN(el->el_ea);
535 if (GFS2_EA_IS_STUFFED(el->el_ea)) {
536 memcpy(data, GFS2_EA2DATA(el->el_ea), len);
539 ret = gfs2_iter_unstuffed(ip, el->el_ea, NULL, data);
545 int gfs2_xattr_acl_get(struct gfs2_inode *ip, const char *name, char **ppdata)
547 struct gfs2_ea_location el;
552 error = gfs2_ea_find(ip, GFS2_EATYPE_SYS, name, &el);
557 if (!GFS2_EA_DATA_LEN(el.el_ea))
560 len = GFS2_EA_DATA_LEN(el.el_ea);
561 data = kmalloc(len, GFP_NOFS);
566 error = gfs2_ea_get_copy(ip, &el, data, len);
577 * gfs2_xattr_get - Get a GFS2 extended attribute
579 * @name: The name of the extended attribute
580 * @buffer: The buffer to write the result into
581 * @size: The size of the buffer
582 * @type: The type of extended attribute
584 * Returns: actual size of data on success, -errno on error
586 static int gfs2_xattr_get(const struct xattr_handler *handler,
587 struct dentry *dentry, const char *name,
588 void *buffer, size_t size)
590 struct gfs2_inode *ip = GFS2_I(d_inode(dentry));
591 struct gfs2_ea_location el;
592 int type = handler->flags;
597 if (strlen(name) > GFS2_EA_MAX_NAME_LEN)
600 error = gfs2_ea_find(ip, type, name, &el);
606 error = gfs2_ea_get_copy(ip, &el, buffer, size);
608 error = GFS2_EA_DATA_LEN(el.el_ea);
615 * ea_alloc_blk - allocates a new block for extended attributes.
616 * @ip: A pointer to the inode that's getting extended attributes
617 * @bhp: Pointer to pointer to a struct buffer_head
622 static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp)
624 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
625 struct gfs2_ea_header *ea;
630 error = gfs2_alloc_blocks(ip, &block, &n, 0, NULL);
633 gfs2_trans_add_unrevoke(sdp, block, 1);
634 *bhp = gfs2_meta_new(ip->i_gl, block);
635 gfs2_trans_add_meta(ip->i_gl, *bhp);
636 gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
637 gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header));
639 ea = GFS2_EA_BH2FIRST(*bhp);
640 ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
641 ea->ea_type = GFS2_EATYPE_UNUSED;
642 ea->ea_flags = GFS2_EAFLAG_LAST;
645 gfs2_add_inode_blocks(&ip->i_inode, 1);
651 * ea_write - writes the request info to an ea, creating new blocks if
653 * @ip: inode that is being modified
654 * @ea: the location of the new ea in a block
655 * @er: the write request
657 * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags
662 static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
663 struct gfs2_ea_request *er)
665 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
668 ea->ea_data_len = cpu_to_be32(er->er_data_len);
669 ea->ea_name_len = er->er_name_len;
670 ea->ea_type = er->er_type;
673 memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len);
675 if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) {
677 memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len);
679 __be64 *dataptr = GFS2_EA2DATAPTRS(ea);
680 const char *data = er->er_data;
681 unsigned int data_len = er->er_data_len;
685 ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize);
686 for (x = 0; x < ea->ea_num_ptrs; x++) {
687 struct buffer_head *bh;
689 int mh_size = sizeof(struct gfs2_meta_header);
692 error = gfs2_alloc_blocks(ip, &block, &n, 0, NULL);
695 gfs2_trans_add_unrevoke(sdp, block, 1);
696 bh = gfs2_meta_new(ip->i_gl, block);
697 gfs2_trans_add_meta(ip->i_gl, bh);
698 gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED);
700 gfs2_add_inode_blocks(&ip->i_inode, 1);
702 copy = data_len > sdp->sd_jbsize ? sdp->sd_jbsize :
704 memcpy(bh->b_data + mh_size, data, copy);
705 if (copy < sdp->sd_jbsize)
706 memset(bh->b_data + mh_size + copy, 0,
707 sdp->sd_jbsize - copy);
709 *dataptr++ = cpu_to_be64(bh->b_blocknr);
716 gfs2_assert_withdraw(sdp, !data_len);
722 typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip,
723 struct gfs2_ea_request *er, void *private);
725 static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er,
727 ea_skeleton_call_t skeleton_call, void *private)
729 struct gfs2_alloc_parms ap = { .target = blks };
730 struct buffer_head *dibh;
733 error = gfs2_rindex_update(GFS2_SB(&ip->i_inode));
737 error = gfs2_quota_lock_check(ip, &ap);
741 error = gfs2_inplace_reserve(ip, &ap);
745 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode),
746 blks + gfs2_rg_blocks(ip, blks) +
747 RES_DINODE + RES_STATFS + RES_QUOTA, 0);
751 error = skeleton_call(ip, er, private);
755 error = gfs2_meta_inode_buffer(ip, &dibh);
757 ip->i_inode.i_ctime = CURRENT_TIME;
758 gfs2_trans_add_meta(ip->i_gl, dibh);
759 gfs2_dinode_out(ip, dibh->b_data);
764 gfs2_trans_end(GFS2_SB(&ip->i_inode));
766 gfs2_inplace_release(ip);
768 gfs2_quota_unlock(ip);
772 static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
775 struct buffer_head *bh;
778 error = ea_alloc_blk(ip, &bh);
782 ip->i_eattr = bh->b_blocknr;
783 error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er);
791 * ea_init - initializes a new eattr block
798 static int ea_init(struct gfs2_inode *ip, int type, const char *name,
799 const void *data, size_t size)
801 struct gfs2_ea_request er;
802 unsigned int jbsize = GFS2_SB(&ip->i_inode)->sd_jbsize;
803 unsigned int blks = 1;
807 er.er_name_len = strlen(name);
808 er.er_data = (void *)data;
809 er.er_data_len = size;
811 if (GFS2_EAREQ_SIZE_STUFFED(&er) > jbsize)
812 blks += DIV_ROUND_UP(er.er_data_len, jbsize);
814 return ea_alloc_skeleton(ip, &er, blks, ea_init_i, NULL);
817 static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea)
819 u32 ea_size = GFS2_EA_SIZE(ea);
820 struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea +
822 u32 new_size = GFS2_EA_REC_LEN(ea) - ea_size;
823 int last = ea->ea_flags & GFS2_EAFLAG_LAST;
825 ea->ea_rec_len = cpu_to_be32(ea_size);
826 ea->ea_flags ^= last;
828 new->ea_rec_len = cpu_to_be32(new_size);
829 new->ea_flags = last;
834 static void ea_set_remove_stuffed(struct gfs2_inode *ip,
835 struct gfs2_ea_location *el)
837 struct gfs2_ea_header *ea = el->el_ea;
838 struct gfs2_ea_header *prev = el->el_prev;
841 gfs2_trans_add_meta(ip->i_gl, el->el_bh);
843 if (!prev || !GFS2_EA_IS_STUFFED(ea)) {
844 ea->ea_type = GFS2_EATYPE_UNUSED;
846 } else if (GFS2_EA2NEXT(prev) != ea) {
847 prev = GFS2_EA2NEXT(prev);
848 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), GFS2_EA2NEXT(prev) == ea);
851 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
852 prev->ea_rec_len = cpu_to_be32(len);
854 if (GFS2_EA_IS_LAST(ea))
855 prev->ea_flags |= GFS2_EAFLAG_LAST;
861 struct gfs2_ea_request *es_er;
862 struct gfs2_ea_location *es_el;
864 struct buffer_head *es_bh;
865 struct gfs2_ea_header *es_ea;
868 static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh,
869 struct gfs2_ea_header *ea, struct ea_set *es)
871 struct gfs2_ea_request *er = es->es_er;
872 struct buffer_head *dibh;
875 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + 2 * RES_EATTR, 0);
879 gfs2_trans_add_meta(ip->i_gl, bh);
882 ea = ea_split_ea(ea);
884 ea_write(ip, ea, er);
887 ea_set_remove_stuffed(ip, es->es_el);
889 error = gfs2_meta_inode_buffer(ip, &dibh);
892 ip->i_inode.i_ctime = CURRENT_TIME;
893 gfs2_trans_add_meta(ip->i_gl, dibh);
894 gfs2_dinode_out(ip, dibh->b_data);
897 gfs2_trans_end(GFS2_SB(&ip->i_inode));
901 static int ea_set_simple_alloc(struct gfs2_inode *ip,
902 struct gfs2_ea_request *er, void *private)
904 struct ea_set *es = private;
905 struct gfs2_ea_header *ea = es->es_ea;
908 gfs2_trans_add_meta(ip->i_gl, es->es_bh);
911 ea = ea_split_ea(ea);
913 error = ea_write(ip, ea, er);
918 ea_set_remove_stuffed(ip, es->es_el);
923 static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh,
924 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
927 struct ea_set *es = private;
932 stuffed = ea_calc_size(GFS2_SB(&ip->i_inode), es->es_er->er_name_len,
933 es->es_er->er_data_len, &size);
935 if (ea->ea_type == GFS2_EATYPE_UNUSED) {
936 if (GFS2_EA_REC_LEN(ea) < size)
938 if (!GFS2_EA_IS_STUFFED(ea)) {
939 error = ea_remove_unstuffed(ip, bh, ea, prev, 1);
944 } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size)
950 error = ea_set_simple_noalloc(ip, bh, ea, es);
958 blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len,
959 GFS2_SB(&ip->i_inode)->sd_jbsize);
961 error = ea_alloc_skeleton(ip, es->es_er, blks,
962 ea_set_simple_alloc, es);
970 static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er,
973 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
974 struct buffer_head *indbh, *newbh;
977 int mh_size = sizeof(struct gfs2_meta_header);
979 if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) {
982 error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, 0,
987 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
992 eablk = (__be64 *)(indbh->b_data + mh_size);
993 end = eablk + sdp->sd_inptrs;
995 for (; eablk < end; eablk++)
1004 gfs2_trans_add_meta(ip->i_gl, indbh);
1008 error = gfs2_alloc_blocks(ip, &blk, &n, 0, NULL);
1011 gfs2_trans_add_unrevoke(sdp, blk, 1);
1012 indbh = gfs2_meta_new(ip->i_gl, blk);
1013 gfs2_trans_add_meta(ip->i_gl, indbh);
1014 gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN);
1015 gfs2_buffer_clear_tail(indbh, mh_size);
1017 eablk = (__be64 *)(indbh->b_data + mh_size);
1018 *eablk = cpu_to_be64(ip->i_eattr);
1020 ip->i_diskflags |= GFS2_DIF_EA_INDIRECT;
1021 gfs2_add_inode_blocks(&ip->i_inode, 1);
1026 error = ea_alloc_blk(ip, &newbh);
1030 *eablk = cpu_to_be64((u64)newbh->b_blocknr);
1031 error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er);
1037 ea_set_remove_stuffed(ip, private);
1044 static int ea_set_i(struct gfs2_inode *ip, int type, const char *name,
1045 const void *value, size_t size, struct gfs2_ea_location *el)
1047 struct gfs2_ea_request er;
1049 unsigned int blks = 2;
1054 er.er_data = (void *)value;
1055 er.er_name_len = strlen(name);
1056 er.er_data_len = size;
1058 memset(&es, 0, sizeof(struct ea_set));
1062 error = ea_foreach(ip, ea_set_simple, &es);
1068 if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT))
1070 if (GFS2_EAREQ_SIZE_STUFFED(&er) > GFS2_SB(&ip->i_inode)->sd_jbsize)
1071 blks += DIV_ROUND_UP(er.er_data_len, GFS2_SB(&ip->i_inode)->sd_jbsize);
1073 return ea_alloc_skeleton(ip, &er, blks, ea_set_block, el);
1076 static int ea_set_remove_unstuffed(struct gfs2_inode *ip,
1077 struct gfs2_ea_location *el)
1079 if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) {
1080 el->el_prev = GFS2_EA2NEXT(el->el_prev);
1081 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode),
1082 GFS2_EA2NEXT(el->el_prev) == el->el_ea);
1085 return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev, 0);
1088 static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el)
1090 struct gfs2_ea_header *ea = el->el_ea;
1091 struct gfs2_ea_header *prev = el->el_prev;
1092 struct buffer_head *dibh;
1095 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0);
1099 gfs2_trans_add_meta(ip->i_gl, el->el_bh);
1104 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
1105 prev->ea_rec_len = cpu_to_be32(len);
1107 if (GFS2_EA_IS_LAST(ea))
1108 prev->ea_flags |= GFS2_EAFLAG_LAST;
1110 ea->ea_type = GFS2_EATYPE_UNUSED;
1113 error = gfs2_meta_inode_buffer(ip, &dibh);
1115 ip->i_inode.i_ctime = CURRENT_TIME;
1116 gfs2_trans_add_meta(ip->i_gl, dibh);
1117 gfs2_dinode_out(ip, dibh->b_data);
1121 gfs2_trans_end(GFS2_SB(&ip->i_inode));
1127 * gfs2_xattr_remove - Remove a GFS2 extended attribute
1129 * @type: The type of the extended attribute
1130 * @name: The name of the extended attribute
1132 * This is not called directly by the VFS since we use the (common)
1133 * scheme of making a "set with NULL data" mean a remove request. Note
1134 * that this is different from a set with zero length data.
1136 * Returns: 0, or errno on failure
1139 static int gfs2_xattr_remove(struct gfs2_inode *ip, int type, const char *name)
1141 struct gfs2_ea_location el;
1147 error = gfs2_ea_find(ip, type, name, &el);
1153 if (GFS2_EA_IS_STUFFED(el.el_ea))
1154 error = ea_remove_stuffed(ip, &el);
1156 error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev, 0);
1164 * __gfs2_xattr_set - Set (or remove) a GFS2 extended attribute
1166 * @name: The name of the extended attribute
1167 * @value: The value of the extended attribute (NULL for remove)
1168 * @size: The size of the @value argument
1169 * @flags: Create or Replace
1170 * @type: The type of the extended attribute
1172 * See gfs2_xattr_remove() for details of the removal of xattrs.
1174 * Returns: 0 or errno on failure
1177 int __gfs2_xattr_set(struct inode *inode, const char *name,
1178 const void *value, size_t size, int flags, int type)
1180 struct gfs2_inode *ip = GFS2_I(inode);
1181 struct gfs2_sbd *sdp = GFS2_SB(inode);
1182 struct gfs2_ea_location el;
1183 unsigned int namel = strlen(name);
1186 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
1188 if (namel > GFS2_EA_MAX_NAME_LEN)
1192 return gfs2_xattr_remove(ip, type, name);
1194 if (ea_check_size(sdp, namel, size))
1198 if (flags & XATTR_REPLACE)
1200 return ea_init(ip, type, name, value, size);
1203 error = gfs2_ea_find(ip, type, name, &el);
1208 if (ip->i_diskflags & GFS2_DIF_APPENDONLY) {
1214 if (!(flags & XATTR_CREATE)) {
1215 int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea);
1216 error = ea_set_i(ip, type, name, value, size, &el);
1217 if (!error && unstuffed)
1218 ea_set_remove_unstuffed(ip, &el);
1226 if (!(flags & XATTR_REPLACE))
1227 error = ea_set_i(ip, type, name, value, size, NULL);
1232 static int gfs2_xattr_set(const struct xattr_handler *handler,
1233 struct dentry *dentry, const char *name,
1234 const void *value, size_t size, int flags)
1236 return __gfs2_xattr_set(d_inode(dentry), name, value,
1237 size, flags, handler->flags);
1240 static int ea_dealloc_indirect(struct gfs2_inode *ip)
1242 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1243 struct gfs2_rgrp_list rlist;
1244 struct buffer_head *indbh, *dibh;
1245 __be64 *eablk, *end;
1246 unsigned int rg_blocks = 0;
1248 unsigned int blen = 0;
1249 unsigned int blks = 0;
1253 error = gfs2_rindex_update(sdp);
1257 memset(&rlist, 0, sizeof(struct gfs2_rgrp_list));
1259 error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, 0, &indbh);
1263 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
1268 eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1269 end = eablk + sdp->sd_inptrs;
1271 for (; eablk < end; eablk++) {
1276 bn = be64_to_cpu(*eablk);
1278 if (bstart + blen == bn)
1282 gfs2_rlist_add(ip, &rlist, bstart);
1289 gfs2_rlist_add(ip, &rlist, bstart);
1293 gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE);
1295 for (x = 0; x < rlist.rl_rgrps; x++) {
1296 struct gfs2_rgrpd *rgd;
1297 rgd = rlist.rl_ghs[x].gh_gl->gl_object;
1298 rg_blocks += rgd->rd_length;
1301 error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs);
1303 goto out_rlist_free;
1305 error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE + RES_INDIRECT +
1306 RES_STATFS + RES_QUOTA, blks);
1310 gfs2_trans_add_meta(ip->i_gl, indbh);
1312 eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1316 for (; eablk < end; eablk++) {
1321 bn = be64_to_cpu(*eablk);
1323 if (bstart + blen == bn)
1327 gfs2_free_meta(ip, bstart, blen);
1333 gfs2_add_inode_blocks(&ip->i_inode, -1);
1336 gfs2_free_meta(ip, bstart, blen);
1338 ip->i_diskflags &= ~GFS2_DIF_EA_INDIRECT;
1340 error = gfs2_meta_inode_buffer(ip, &dibh);
1342 gfs2_trans_add_meta(ip->i_gl, dibh);
1343 gfs2_dinode_out(ip, dibh->b_data);
1347 gfs2_trans_end(sdp);
1350 gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs);
1352 gfs2_rlist_free(&rlist);
1358 static int ea_dealloc_block(struct gfs2_inode *ip)
1360 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1361 struct gfs2_rgrpd *rgd;
1362 struct buffer_head *dibh;
1363 struct gfs2_holder gh;
1366 error = gfs2_rindex_update(sdp);
1370 rgd = gfs2_blk2rgrpd(sdp, ip->i_eattr, 1);
1372 gfs2_consist_inode(ip);
1376 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &gh);
1380 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE + RES_STATFS +
1385 gfs2_free_meta(ip, ip->i_eattr, 1);
1388 gfs2_add_inode_blocks(&ip->i_inode, -1);
1390 error = gfs2_meta_inode_buffer(ip, &dibh);
1392 gfs2_trans_add_meta(ip->i_gl, dibh);
1393 gfs2_dinode_out(ip, dibh->b_data);
1397 gfs2_trans_end(sdp);
1400 gfs2_glock_dq_uninit(&gh);
1405 * gfs2_ea_dealloc - deallocate the extended attribute fork
1411 int gfs2_ea_dealloc(struct gfs2_inode *ip)
1415 error = gfs2_rindex_update(GFS2_SB(&ip->i_inode));
1419 error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE);
1423 error = ea_foreach(ip, ea_dealloc_unstuffed, NULL);
1427 if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) {
1428 error = ea_dealloc_indirect(ip);
1433 error = ea_dealloc_block(ip);
1436 gfs2_quota_unhold(ip);
1440 static const struct xattr_handler gfs2_xattr_user_handler = {
1441 .prefix = XATTR_USER_PREFIX,
1442 .flags = GFS2_EATYPE_USR,
1443 .get = gfs2_xattr_get,
1444 .set = gfs2_xattr_set,
1447 static const struct xattr_handler gfs2_xattr_security_handler = {
1448 .prefix = XATTR_SECURITY_PREFIX,
1449 .flags = GFS2_EATYPE_SECURITY,
1450 .get = gfs2_xattr_get,
1451 .set = gfs2_xattr_set,
1454 const struct xattr_handler *gfs2_xattr_handlers[] = {
1455 &gfs2_xattr_user_handler,
1456 &gfs2_xattr_security_handler,
1457 &posix_acl_access_xattr_handler,
1458 &posix_acl_default_xattr_handler,