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 <linux/uaccess.h>
33 * ea_calc_size - returns the acutal number of bytes the request will take up
34 * (not counting any unstuffed data blocks)
39 * Returns: 1 if the EA should be stuffed
42 static int ea_calc_size(struct gfs2_sbd *sdp, unsigned int nsize, size_t dsize,
45 unsigned int jbsize = sdp->sd_jbsize;
48 *size = ALIGN(sizeof(struct gfs2_ea_header) + nsize + dsize, 8);
54 *size = ALIGN(sizeof(struct gfs2_ea_header) + nsize +
55 (sizeof(__be64) * DIV_ROUND_UP(dsize, jbsize)), 8);
60 static int ea_check_size(struct gfs2_sbd *sdp, unsigned int nsize, size_t dsize)
64 if (dsize > GFS2_EA_MAX_DATA_LEN)
67 ea_calc_size(sdp, nsize, dsize, &size);
69 /* This can only happen with 512 byte blocks */
70 if (size > sdp->sd_jbsize)
76 typedef int (*ea_call_t) (struct gfs2_inode *ip, struct buffer_head *bh,
77 struct gfs2_ea_header *ea,
78 struct gfs2_ea_header *prev, void *private);
80 static int ea_foreach_i(struct gfs2_inode *ip, struct buffer_head *bh,
81 ea_call_t ea_call, void *data)
83 struct gfs2_ea_header *ea, *prev = NULL;
86 if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_EA))
89 for (ea = GFS2_EA_BH2FIRST(bh);; prev = ea, ea = GFS2_EA2NEXT(ea)) {
90 if (!GFS2_EA_REC_LEN(ea))
92 if (!(bh->b_data <= (char *)ea && (char *)GFS2_EA2NEXT(ea) <=
93 bh->b_data + bh->b_size))
95 if (!GFS2_EATYPE_VALID(ea->ea_type))
98 error = ea_call(ip, bh, ea, prev, data);
102 if (GFS2_EA_IS_LAST(ea)) {
103 if ((char *)GFS2_EA2NEXT(ea) !=
104 bh->b_data + bh->b_size)
113 gfs2_consist_inode(ip);
117 static int ea_foreach(struct gfs2_inode *ip, ea_call_t ea_call, void *data)
119 struct buffer_head *bh, *eabh;
123 error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, 0, &bh);
127 if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT)) {
128 error = ea_foreach_i(ip, bh, ea_call, data);
132 if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_IN)) {
137 eablk = (__be64 *)(bh->b_data + sizeof(struct gfs2_meta_header));
138 end = eablk + GFS2_SB(&ip->i_inode)->sd_inptrs;
140 for (; eablk < end; eablk++) {
145 bn = be64_to_cpu(*eablk);
147 error = gfs2_meta_read(ip->i_gl, bn, DIO_WAIT, 0, &eabh);
150 error = ea_foreach_i(ip, eabh, ea_call, data);
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;
173 if (ea->ea_type == GFS2_EATYPE_UNUSED)
176 if (ea->ea_type == ef->type) {
177 if (ea->ea_name_len == ef->namel &&
178 !memcmp(GFS2_EA2NAME(ea), ef->name, ea->ea_name_len)) {
179 struct gfs2_ea_location *el = ef->ef_el;
191 static int gfs2_ea_find(struct gfs2_inode *ip, int type, const char *name,
192 struct gfs2_ea_location *el)
199 ef.namel = strlen(name);
202 memset(el, 0, sizeof(struct gfs2_ea_location));
204 error = ea_foreach(ip, ea_find_i, &ef);
212 * ea_dealloc_unstuffed -
219 * Take advantage of the fact that all unstuffed blocks are
220 * allocated from the same RG. But watch, this may not always
226 static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
227 struct gfs2_ea_header *ea,
228 struct gfs2_ea_header *prev, void *private)
230 int *leave = private;
231 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
232 struct gfs2_rgrpd *rgd;
233 struct gfs2_holder rg_gh;
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 ip->i_inode.i_ctime = current_time(&ip->i_inode);
311 __mark_inode_dirty(&ip->i_inode, I_DIRTY_DATASYNC);
316 gfs2_glock_dq_uninit(&rg_gh);
320 static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
321 struct gfs2_ea_header *ea,
322 struct gfs2_ea_header *prev, int leave)
326 error = gfs2_rindex_update(GFS2_SB(&ip->i_inode));
330 error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE);
334 error = ea_dealloc_unstuffed(ip, bh, ea, prev, (leave) ? &error : NULL);
336 gfs2_quota_unhold(ip);
342 struct gfs2_ea_request *ei_er;
343 unsigned int ei_size;
346 static inline unsigned int gfs2_ea_strlen(struct gfs2_ea_header *ea)
348 switch (ea->ea_type) {
349 case GFS2_EATYPE_USR:
350 return 5 + ea->ea_name_len + 1;
351 case GFS2_EATYPE_SYS:
352 return 7 + ea->ea_name_len + 1;
353 case GFS2_EATYPE_SECURITY:
354 return 9 + ea->ea_name_len + 1;
360 static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh,
361 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
364 struct ea_list *ei = private;
365 struct gfs2_ea_request *er = ei->ei_er;
366 unsigned int ea_size = gfs2_ea_strlen(ea);
368 if (ea->ea_type == GFS2_EATYPE_UNUSED)
371 if (er->er_data_len) {
376 if (ei->ei_size + ea_size > er->er_data_len)
379 switch (ea->ea_type) {
380 case GFS2_EATYPE_USR:
384 case GFS2_EATYPE_SYS:
388 case GFS2_EATYPE_SECURITY:
389 prefix = "security.";
396 memcpy(er->er_data + ei->ei_size, prefix, l);
397 memcpy(er->er_data + ei->ei_size + l, GFS2_EA2NAME(ea),
399 memcpy(er->er_data + ei->ei_size + ea_size - 1, &c, 1);
402 ei->ei_size += ea_size;
408 * gfs2_listxattr - List gfs2 extended attributes
409 * @dentry: The dentry whose inode we are interested in
410 * @buffer: The buffer to write the results
411 * @size: The size of the buffer
413 * Returns: actual size of data on success, -errno on error
416 ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size)
418 struct gfs2_inode *ip = GFS2_I(d_inode(dentry));
419 struct gfs2_ea_request er;
420 struct gfs2_holder i_gh;
423 memset(&er, 0, sizeof(struct gfs2_ea_request));
426 er.er_data_len = size;
429 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
434 struct ea_list ei = { .ei_er = &er, .ei_size = 0 };
436 error = ea_foreach(ip, ea_list_i, &ei);
441 gfs2_glock_dq_uninit(&i_gh);
447 * ea_iter_unstuffed - copies the unstuffed xattr data to/from the
449 * @ip: The GFS2 inode
450 * @ea: The extended attribute header structure
451 * @din: The data to be copied in
452 * @dout: The data to be copied out (one of din,dout will be NULL)
457 static int gfs2_iter_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
458 const char *din, char *dout)
460 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
461 struct buffer_head **bh;
462 unsigned int amount = GFS2_EA_DATA_LEN(ea);
463 unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
464 __be64 *dataptrs = GFS2_EA2DATAPTRS(ea);
470 bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_NOFS);
474 for (x = 0; x < nptrs; x++) {
475 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0, 0,
485 for (x = 0; x < nptrs; x++) {
486 error = gfs2_meta_wait(sdp, bh[x]);
488 for (; x < nptrs; x++)
492 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
493 for (; x < nptrs; x++)
499 pos = bh[x]->b_data + sizeof(struct gfs2_meta_header);
500 cp_size = (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize;
503 memcpy(dout, pos, cp_size);
504 dout += sdp->sd_jbsize;
508 gfs2_trans_add_meta(ip->i_gl, bh[x]);
509 memcpy(pos, din, cp_size);
510 din += sdp->sd_jbsize;
513 amount -= sdp->sd_jbsize;
522 static int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
523 char *data, size_t size)
526 size_t len = GFS2_EA_DATA_LEN(el->el_ea);
530 if (GFS2_EA_IS_STUFFED(el->el_ea)) {
531 memcpy(data, GFS2_EA2DATA(el->el_ea), len);
534 ret = gfs2_iter_unstuffed(ip, el->el_ea, NULL, data);
540 int gfs2_xattr_acl_get(struct gfs2_inode *ip, const char *name, char **ppdata)
542 struct gfs2_ea_location el;
547 error = gfs2_ea_find(ip, GFS2_EATYPE_SYS, name, &el);
552 if (!GFS2_EA_DATA_LEN(el.el_ea))
555 len = GFS2_EA_DATA_LEN(el.el_ea);
556 data = kmalloc(len, GFP_NOFS);
561 error = gfs2_ea_get_copy(ip, &el, data, len);
572 * gfs2_xattr_get - Get a GFS2 extended attribute
574 * @name: The name of the extended attribute
575 * @buffer: The buffer to write the result into
576 * @size: The size of the buffer
577 * @type: The type of extended attribute
579 * Returns: actual size of data on success, -errno on error
581 static int __gfs2_xattr_get(struct inode *inode, const char *name,
582 void *buffer, size_t size, int type)
584 struct gfs2_inode *ip = GFS2_I(inode);
585 struct gfs2_ea_location el;
590 if (strlen(name) > GFS2_EA_MAX_NAME_LEN)
593 error = gfs2_ea_find(ip, type, name, &el);
599 error = gfs2_ea_get_copy(ip, &el, buffer, size);
601 error = GFS2_EA_DATA_LEN(el.el_ea);
607 static int gfs2_xattr_get(const struct xattr_handler *handler,
608 struct dentry *unused, struct inode *inode,
609 const char *name, void *buffer, size_t size)
611 struct gfs2_inode *ip = GFS2_I(inode);
612 struct gfs2_holder gh;
615 /* During lookup, SELinux calls this function with the glock locked. */
617 if (!gfs2_glock_is_locked_by_me(ip->i_gl)) {
618 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
622 gfs2_holder_mark_uninitialized(&gh);
624 ret = __gfs2_xattr_get(inode, name, buffer, size, handler->flags);
625 if (gfs2_holder_initialized(&gh))
626 gfs2_glock_dq_uninit(&gh);
631 * ea_alloc_blk - allocates a new block for extended attributes.
632 * @ip: A pointer to the inode that's getting extended attributes
633 * @bhp: Pointer to pointer to a struct buffer_head
638 static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp)
640 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
641 struct gfs2_ea_header *ea;
646 error = gfs2_alloc_blocks(ip, &block, &n, 0, NULL);
649 gfs2_trans_add_unrevoke(sdp, block, 1);
650 *bhp = gfs2_meta_new(ip->i_gl, block);
651 gfs2_trans_add_meta(ip->i_gl, *bhp);
652 gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
653 gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header));
655 ea = GFS2_EA_BH2FIRST(*bhp);
656 ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
657 ea->ea_type = GFS2_EATYPE_UNUSED;
658 ea->ea_flags = GFS2_EAFLAG_LAST;
661 gfs2_add_inode_blocks(&ip->i_inode, 1);
667 * ea_write - writes the request info to an ea, creating new blocks if
669 * @ip: inode that is being modified
670 * @ea: the location of the new ea in a block
671 * @er: the write request
673 * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags
678 static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
679 struct gfs2_ea_request *er)
681 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
684 ea->ea_data_len = cpu_to_be32(er->er_data_len);
685 ea->ea_name_len = er->er_name_len;
686 ea->ea_type = er->er_type;
689 memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len);
691 if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) {
693 memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len);
695 __be64 *dataptr = GFS2_EA2DATAPTRS(ea);
696 const char *data = er->er_data;
697 unsigned int data_len = er->er_data_len;
701 ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize);
702 for (x = 0; x < ea->ea_num_ptrs; x++) {
703 struct buffer_head *bh;
705 int mh_size = sizeof(struct gfs2_meta_header);
708 error = gfs2_alloc_blocks(ip, &block, &n, 0, NULL);
711 gfs2_trans_add_unrevoke(sdp, block, 1);
712 bh = gfs2_meta_new(ip->i_gl, block);
713 gfs2_trans_add_meta(ip->i_gl, bh);
714 gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED);
716 gfs2_add_inode_blocks(&ip->i_inode, 1);
718 copy = data_len > sdp->sd_jbsize ? sdp->sd_jbsize :
720 memcpy(bh->b_data + mh_size, data, copy);
721 if (copy < sdp->sd_jbsize)
722 memset(bh->b_data + mh_size + copy, 0,
723 sdp->sd_jbsize - copy);
725 *dataptr++ = cpu_to_be64(bh->b_blocknr);
732 gfs2_assert_withdraw(sdp, !data_len);
738 typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip,
739 struct gfs2_ea_request *er, void *private);
741 static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er,
743 ea_skeleton_call_t skeleton_call, void *private)
745 struct gfs2_alloc_parms ap = { .target = blks };
748 error = gfs2_rindex_update(GFS2_SB(&ip->i_inode));
752 error = gfs2_quota_lock_check(ip, &ap);
756 error = gfs2_inplace_reserve(ip, &ap);
760 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode),
761 blks + gfs2_rg_blocks(ip, blks) +
762 RES_DINODE + RES_STATFS + RES_QUOTA, 0);
766 error = skeleton_call(ip, er, private);
770 ip->i_inode.i_ctime = current_time(&ip->i_inode);
771 __mark_inode_dirty(&ip->i_inode, I_DIRTY_DATASYNC);
774 gfs2_trans_end(GFS2_SB(&ip->i_inode));
776 gfs2_inplace_release(ip);
778 gfs2_quota_unlock(ip);
782 static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
785 struct buffer_head *bh;
788 error = ea_alloc_blk(ip, &bh);
792 ip->i_eattr = bh->b_blocknr;
793 error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er);
801 * ea_init - initializes a new eattr block
808 static int ea_init(struct gfs2_inode *ip, int type, const char *name,
809 const void *data, size_t size)
811 struct gfs2_ea_request er;
812 unsigned int jbsize = GFS2_SB(&ip->i_inode)->sd_jbsize;
813 unsigned int blks = 1;
817 er.er_name_len = strlen(name);
818 er.er_data = (void *)data;
819 er.er_data_len = size;
821 if (GFS2_EAREQ_SIZE_STUFFED(&er) > jbsize)
822 blks += DIV_ROUND_UP(er.er_data_len, jbsize);
824 return ea_alloc_skeleton(ip, &er, blks, ea_init_i, NULL);
827 static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea)
829 u32 ea_size = GFS2_EA_SIZE(ea);
830 struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea +
832 u32 new_size = GFS2_EA_REC_LEN(ea) - ea_size;
833 int last = ea->ea_flags & GFS2_EAFLAG_LAST;
835 ea->ea_rec_len = cpu_to_be32(ea_size);
836 ea->ea_flags ^= last;
838 new->ea_rec_len = cpu_to_be32(new_size);
839 new->ea_flags = last;
844 static void ea_set_remove_stuffed(struct gfs2_inode *ip,
845 struct gfs2_ea_location *el)
847 struct gfs2_ea_header *ea = el->el_ea;
848 struct gfs2_ea_header *prev = el->el_prev;
851 gfs2_trans_add_meta(ip->i_gl, el->el_bh);
853 if (!prev || !GFS2_EA_IS_STUFFED(ea)) {
854 ea->ea_type = GFS2_EATYPE_UNUSED;
856 } else if (GFS2_EA2NEXT(prev) != ea) {
857 prev = GFS2_EA2NEXT(prev);
858 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), GFS2_EA2NEXT(prev) == ea);
861 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
862 prev->ea_rec_len = cpu_to_be32(len);
864 if (GFS2_EA_IS_LAST(ea))
865 prev->ea_flags |= GFS2_EAFLAG_LAST;
871 struct gfs2_ea_request *es_er;
872 struct gfs2_ea_location *es_el;
874 struct buffer_head *es_bh;
875 struct gfs2_ea_header *es_ea;
878 static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh,
879 struct gfs2_ea_header *ea, struct ea_set *es)
881 struct gfs2_ea_request *er = es->es_er;
884 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + 2 * RES_EATTR, 0);
888 gfs2_trans_add_meta(ip->i_gl, bh);
891 ea = ea_split_ea(ea);
893 ea_write(ip, ea, er);
896 ea_set_remove_stuffed(ip, es->es_el);
898 ip->i_inode.i_ctime = current_time(&ip->i_inode);
899 __mark_inode_dirty(&ip->i_inode, I_DIRTY_DATASYNC);
901 gfs2_trans_end(GFS2_SB(&ip->i_inode));
905 static int ea_set_simple_alloc(struct gfs2_inode *ip,
906 struct gfs2_ea_request *er, void *private)
908 struct ea_set *es = private;
909 struct gfs2_ea_header *ea = es->es_ea;
912 gfs2_trans_add_meta(ip->i_gl, es->es_bh);
915 ea = ea_split_ea(ea);
917 error = ea_write(ip, ea, er);
922 ea_set_remove_stuffed(ip, es->es_el);
927 static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh,
928 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
931 struct ea_set *es = private;
936 stuffed = ea_calc_size(GFS2_SB(&ip->i_inode), es->es_er->er_name_len,
937 es->es_er->er_data_len, &size);
939 if (ea->ea_type == GFS2_EATYPE_UNUSED) {
940 if (GFS2_EA_REC_LEN(ea) < size)
942 if (!GFS2_EA_IS_STUFFED(ea)) {
943 error = ea_remove_unstuffed(ip, bh, ea, prev, 1);
948 } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size)
954 error = ea_set_simple_noalloc(ip, bh, ea, es);
962 blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len,
963 GFS2_SB(&ip->i_inode)->sd_jbsize);
965 error = ea_alloc_skeleton(ip, es->es_er, blks,
966 ea_set_simple_alloc, es);
974 static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er,
977 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
978 struct buffer_head *indbh, *newbh;
981 int mh_size = sizeof(struct gfs2_meta_header);
983 if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) {
986 error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, 0,
991 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
996 eablk = (__be64 *)(indbh->b_data + mh_size);
997 end = eablk + sdp->sd_inptrs;
999 for (; eablk < end; eablk++)
1008 gfs2_trans_add_meta(ip->i_gl, indbh);
1012 error = gfs2_alloc_blocks(ip, &blk, &n, 0, NULL);
1015 gfs2_trans_add_unrevoke(sdp, blk, 1);
1016 indbh = gfs2_meta_new(ip->i_gl, blk);
1017 gfs2_trans_add_meta(ip->i_gl, indbh);
1018 gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN);
1019 gfs2_buffer_clear_tail(indbh, mh_size);
1021 eablk = (__be64 *)(indbh->b_data + mh_size);
1022 *eablk = cpu_to_be64(ip->i_eattr);
1024 ip->i_diskflags |= GFS2_DIF_EA_INDIRECT;
1025 gfs2_add_inode_blocks(&ip->i_inode, 1);
1030 error = ea_alloc_blk(ip, &newbh);
1034 *eablk = cpu_to_be64((u64)newbh->b_blocknr);
1035 error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er);
1041 ea_set_remove_stuffed(ip, private);
1048 static int ea_set_i(struct gfs2_inode *ip, int type, const char *name,
1049 const void *value, size_t size, struct gfs2_ea_location *el)
1051 struct gfs2_ea_request er;
1053 unsigned int blks = 2;
1058 er.er_data = (void *)value;
1059 er.er_name_len = strlen(name);
1060 er.er_data_len = size;
1062 memset(&es, 0, sizeof(struct ea_set));
1066 error = ea_foreach(ip, ea_set_simple, &es);
1072 if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT))
1074 if (GFS2_EAREQ_SIZE_STUFFED(&er) > GFS2_SB(&ip->i_inode)->sd_jbsize)
1075 blks += DIV_ROUND_UP(er.er_data_len, GFS2_SB(&ip->i_inode)->sd_jbsize);
1077 return ea_alloc_skeleton(ip, &er, blks, ea_set_block, el);
1080 static int ea_set_remove_unstuffed(struct gfs2_inode *ip,
1081 struct gfs2_ea_location *el)
1083 if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) {
1084 el->el_prev = GFS2_EA2NEXT(el->el_prev);
1085 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode),
1086 GFS2_EA2NEXT(el->el_prev) == el->el_ea);
1089 return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev, 0);
1092 static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el)
1094 struct gfs2_ea_header *ea = el->el_ea;
1095 struct gfs2_ea_header *prev = el->el_prev;
1098 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0);
1102 gfs2_trans_add_meta(ip->i_gl, el->el_bh);
1107 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
1108 prev->ea_rec_len = cpu_to_be32(len);
1110 if (GFS2_EA_IS_LAST(ea))
1111 prev->ea_flags |= GFS2_EAFLAG_LAST;
1113 ea->ea_type = GFS2_EATYPE_UNUSED;
1116 ip->i_inode.i_ctime = current_time(&ip->i_inode);
1117 __mark_inode_dirty(&ip->i_inode, I_DIRTY_DATASYNC);
1119 gfs2_trans_end(GFS2_SB(&ip->i_inode));
1125 * gfs2_xattr_remove - Remove a GFS2 extended attribute
1127 * @type: The type of the extended attribute
1128 * @name: The name of the extended attribute
1130 * This is not called directly by the VFS since we use the (common)
1131 * scheme of making a "set with NULL data" mean a remove request. Note
1132 * that this is different from a set with zero length data.
1134 * Returns: 0, or errno on failure
1137 static int gfs2_xattr_remove(struct gfs2_inode *ip, int type, const char *name)
1139 struct gfs2_ea_location el;
1145 error = gfs2_ea_find(ip, type, name, &el);
1151 if (GFS2_EA_IS_STUFFED(el.el_ea))
1152 error = ea_remove_stuffed(ip, &el);
1154 error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev, 0);
1162 * __gfs2_xattr_set - Set (or remove) a GFS2 extended attribute
1164 * @name: The name of the extended attribute
1165 * @value: The value of the extended attribute (NULL for remove)
1166 * @size: The size of the @value argument
1167 * @flags: Create or Replace
1168 * @type: The type of the extended attribute
1170 * See gfs2_xattr_remove() for details of the removal of xattrs.
1172 * Returns: 0 or errno on failure
1175 int __gfs2_xattr_set(struct inode *inode, const char *name,
1176 const void *value, size_t size, int flags, int type)
1178 struct gfs2_inode *ip = GFS2_I(inode);
1179 struct gfs2_sbd *sdp = GFS2_SB(inode);
1180 struct gfs2_ea_location el;
1181 unsigned int namel = strlen(name);
1184 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
1186 if (namel > GFS2_EA_MAX_NAME_LEN)
1189 if (value == NULL) {
1190 error = gfs2_xattr_remove(ip, type, name);
1191 if (error == -ENODATA && !(flags & XATTR_REPLACE))
1196 if (ea_check_size(sdp, namel, size))
1200 if (flags & XATTR_REPLACE)
1202 return ea_init(ip, type, name, value, size);
1205 error = gfs2_ea_find(ip, type, name, &el);
1210 if (ip->i_diskflags & GFS2_DIF_APPENDONLY) {
1216 if (!(flags & XATTR_CREATE)) {
1217 int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea);
1218 error = ea_set_i(ip, type, name, value, size, &el);
1219 if (!error && unstuffed)
1220 ea_set_remove_unstuffed(ip, &el);
1228 if (!(flags & XATTR_REPLACE))
1229 error = ea_set_i(ip, type, name, value, size, NULL);
1234 static int gfs2_xattr_set(const struct xattr_handler *handler,
1235 struct dentry *unused, struct inode *inode,
1236 const char *name, const void *value,
1237 size_t size, int flags)
1239 struct gfs2_inode *ip = GFS2_I(inode);
1240 struct gfs2_holder gh;
1243 ret = gfs2_rsqa_alloc(ip);
1247 /* May be called from gfs_setattr with the glock locked. */
1249 if (!gfs2_glock_is_locked_by_me(ip->i_gl)) {
1250 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
1254 if (WARN_ON_ONCE(ip->i_gl->gl_state != LM_ST_EXCLUSIVE))
1256 gfs2_holder_mark_uninitialized(&gh);
1258 ret = __gfs2_xattr_set(inode, name, value, size, flags, handler->flags);
1259 if (gfs2_holder_initialized(&gh))
1260 gfs2_glock_dq_uninit(&gh);
1264 static int ea_dealloc_indirect(struct gfs2_inode *ip)
1266 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1267 struct gfs2_rgrp_list rlist;
1268 struct buffer_head *indbh, *dibh;
1269 __be64 *eablk, *end;
1270 unsigned int rg_blocks = 0;
1272 unsigned int blen = 0;
1273 unsigned int blks = 0;
1277 error = gfs2_rindex_update(sdp);
1281 memset(&rlist, 0, sizeof(struct gfs2_rgrp_list));
1283 error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, 0, &indbh);
1287 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
1292 eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1293 end = eablk + sdp->sd_inptrs;
1295 for (; eablk < end; eablk++) {
1300 bn = be64_to_cpu(*eablk);
1302 if (bstart + blen == bn)
1306 gfs2_rlist_add(ip, &rlist, bstart);
1313 gfs2_rlist_add(ip, &rlist, bstart);
1317 gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE);
1319 for (x = 0; x < rlist.rl_rgrps; x++) {
1320 struct gfs2_rgrpd *rgd = gfs2_glock2rgrp(rlist.rl_ghs[x].gh_gl);
1322 rg_blocks += rgd->rd_length;
1325 error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs);
1327 goto out_rlist_free;
1329 error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE + RES_INDIRECT +
1330 RES_STATFS + RES_QUOTA, blks);
1334 gfs2_trans_add_meta(ip->i_gl, indbh);
1336 eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1340 for (; eablk < end; eablk++) {
1345 bn = be64_to_cpu(*eablk);
1347 if (bstart + blen == bn)
1351 gfs2_free_meta(ip, bstart, blen);
1357 gfs2_add_inode_blocks(&ip->i_inode, -1);
1360 gfs2_free_meta(ip, bstart, blen);
1362 ip->i_diskflags &= ~GFS2_DIF_EA_INDIRECT;
1364 error = gfs2_meta_inode_buffer(ip, &dibh);
1366 gfs2_trans_add_meta(ip->i_gl, dibh);
1367 gfs2_dinode_out(ip, dibh->b_data);
1371 gfs2_trans_end(sdp);
1374 gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs);
1376 gfs2_rlist_free(&rlist);
1382 static int ea_dealloc_block(struct gfs2_inode *ip)
1384 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1385 struct gfs2_rgrpd *rgd;
1386 struct buffer_head *dibh;
1387 struct gfs2_holder gh;
1390 error = gfs2_rindex_update(sdp);
1394 rgd = gfs2_blk2rgrpd(sdp, ip->i_eattr, 1);
1396 gfs2_consist_inode(ip);
1400 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &gh);
1404 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE + RES_STATFS +
1409 gfs2_free_meta(ip, ip->i_eattr, 1);
1412 gfs2_add_inode_blocks(&ip->i_inode, -1);
1414 error = gfs2_meta_inode_buffer(ip, &dibh);
1416 gfs2_trans_add_meta(ip->i_gl, dibh);
1417 gfs2_dinode_out(ip, dibh->b_data);
1421 gfs2_trans_end(sdp);
1424 gfs2_glock_dq_uninit(&gh);
1429 * gfs2_ea_dealloc - deallocate the extended attribute fork
1435 int gfs2_ea_dealloc(struct gfs2_inode *ip)
1439 error = gfs2_rindex_update(GFS2_SB(&ip->i_inode));
1443 error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE);
1447 error = ea_foreach(ip, ea_dealloc_unstuffed, NULL);
1451 if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) {
1452 error = ea_dealloc_indirect(ip);
1457 error = ea_dealloc_block(ip);
1460 gfs2_quota_unhold(ip);
1464 static const struct xattr_handler gfs2_xattr_user_handler = {
1465 .prefix = XATTR_USER_PREFIX,
1466 .flags = GFS2_EATYPE_USR,
1467 .get = gfs2_xattr_get,
1468 .set = gfs2_xattr_set,
1471 static const struct xattr_handler gfs2_xattr_security_handler = {
1472 .prefix = XATTR_SECURITY_PREFIX,
1473 .flags = GFS2_EATYPE_SECURITY,
1474 .get = gfs2_xattr_get,
1475 .set = gfs2_xattr_set,
1478 const struct xattr_handler *gfs2_xattr_handlers[] = {
1479 &gfs2_xattr_user_handler,
1480 &gfs2_xattr_security_handler,
1481 &posix_acl_access_xattr_handler,
1482 &posix_acl_default_xattr_handler,