1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
6 * Copyright (C) 2004, 2008 Oracle. All rights reserved.
9 * Lots of code in this file is copy from linux/fs/ext3/xattr.c.
10 * Copyright (C) 2001-2003 Andreas Gruenbacher, <agruen@suse.de>
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public
14 * License version 2 as published by the Free Software Foundation.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
22 #include <linux/capability.h>
24 #include <linux/types.h>
25 #include <linux/slab.h>
26 #include <linux/highmem.h>
27 #include <linux/pagemap.h>
28 #include <linux/uio.h>
29 #include <linux/sched.h>
30 #include <linux/splice.h>
31 #include <linux/mount.h>
32 #include <linux/writeback.h>
33 #include <linux/falloc.h>
34 #include <linux/sort.h>
35 #include <linux/init.h>
36 #include <linux/module.h>
37 #include <linux/string.h>
38 #include <linux/security.h>
40 #define MLOG_MASK_PREFIX ML_XATTR
41 #include <cluster/masklog.h>
54 #include "buffer_head_io.h"
59 struct ocfs2_xattr_def_value_root {
60 struct ocfs2_xattr_value_root xv;
61 struct ocfs2_extent_rec er;
64 struct ocfs2_xattr_bucket {
65 /* The inode these xattrs are associated with */
66 struct inode *bu_inode;
68 /* The actual buffers that make up the bucket */
69 struct buffer_head *bu_bhs[OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET];
71 /* How many blocks make up one bucket for this filesystem */
75 struct ocfs2_xattr_set_ctxt {
77 struct ocfs2_alloc_context *meta_ac;
78 struct ocfs2_alloc_context *data_ac;
79 struct ocfs2_cached_dealloc_ctxt dealloc;
82 #define OCFS2_XATTR_ROOT_SIZE (sizeof(struct ocfs2_xattr_def_value_root))
83 #define OCFS2_XATTR_INLINE_SIZE 80
84 #define OCFS2_XATTR_FREE_IN_IBODY (OCFS2_MIN_XATTR_INLINE_SIZE \
85 - sizeof(struct ocfs2_xattr_header) \
87 #define OCFS2_XATTR_FREE_IN_BLOCK(ptr) ((ptr)->i_sb->s_blocksize \
88 - sizeof(struct ocfs2_xattr_block) \
89 - sizeof(struct ocfs2_xattr_header) \
92 static struct ocfs2_xattr_def_value_root def_xv = {
93 .xv.xr_list.l_count = cpu_to_le16(1),
96 struct xattr_handler *ocfs2_xattr_handlers[] = {
97 &ocfs2_xattr_user_handler,
98 #ifdef CONFIG_OCFS2_FS_POSIX_ACL
99 &ocfs2_xattr_acl_access_handler,
100 &ocfs2_xattr_acl_default_handler,
102 &ocfs2_xattr_trusted_handler,
103 &ocfs2_xattr_security_handler,
107 static struct xattr_handler *ocfs2_xattr_handler_map[OCFS2_XATTR_MAX] = {
108 [OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler,
109 #ifdef CONFIG_OCFS2_FS_POSIX_ACL
110 [OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS]
111 = &ocfs2_xattr_acl_access_handler,
112 [OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT]
113 = &ocfs2_xattr_acl_default_handler,
115 [OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler,
116 [OCFS2_XATTR_INDEX_SECURITY] = &ocfs2_xattr_security_handler,
119 struct ocfs2_xattr_info {
126 struct ocfs2_xattr_search {
127 struct buffer_head *inode_bh;
129 * xattr_bh point to the block buffer head which has extended attribute
130 * when extended attribute in inode, xattr_bh is equal to inode_bh.
132 struct buffer_head *xattr_bh;
133 struct ocfs2_xattr_header *header;
134 struct ocfs2_xattr_bucket *bucket;
137 struct ocfs2_xattr_entry *here;
141 static int ocfs2_xattr_bucket_get_name_value(struct inode *inode,
142 struct ocfs2_xattr_header *xh,
147 static int ocfs2_xattr_block_find(struct inode *inode,
150 struct ocfs2_xattr_search *xs);
151 static int ocfs2_xattr_index_block_find(struct inode *inode,
152 struct buffer_head *root_bh,
155 struct ocfs2_xattr_search *xs);
157 static int ocfs2_xattr_tree_list_index_block(struct inode *inode,
158 struct ocfs2_xattr_tree_root *xt,
162 static int ocfs2_xattr_create_index_block(struct inode *inode,
163 struct ocfs2_xattr_search *xs,
164 struct ocfs2_xattr_set_ctxt *ctxt);
166 static int ocfs2_xattr_set_entry_index_block(struct inode *inode,
167 struct ocfs2_xattr_info *xi,
168 struct ocfs2_xattr_search *xs,
169 struct ocfs2_xattr_set_ctxt *ctxt);
171 static int ocfs2_delete_xattr_index_block(struct inode *inode,
172 struct buffer_head *xb_bh);
173 static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle,
174 u64 src_blk, u64 last_blk, u64 to_blk,
175 unsigned int start_bucket,
178 static inline u16 ocfs2_xattr_buckets_per_cluster(struct ocfs2_super *osb)
180 return (1 << osb->s_clustersize_bits) / OCFS2_XATTR_BUCKET_SIZE;
183 static inline u16 ocfs2_blocks_per_xattr_bucket(struct super_block *sb)
185 return OCFS2_XATTR_BUCKET_SIZE / (1 << sb->s_blocksize_bits);
188 static inline u16 ocfs2_xattr_max_xe_in_bucket(struct super_block *sb)
190 u16 len = sb->s_blocksize -
191 offsetof(struct ocfs2_xattr_header, xh_entries);
193 return len / sizeof(struct ocfs2_xattr_entry);
196 #define bucket_blkno(_b) ((_b)->bu_bhs[0]->b_blocknr)
197 #define bucket_block(_b, _n) ((_b)->bu_bhs[(_n)]->b_data)
198 #define bucket_xh(_b) ((struct ocfs2_xattr_header *)bucket_block((_b), 0))
200 static struct ocfs2_xattr_bucket *ocfs2_xattr_bucket_new(struct inode *inode)
202 struct ocfs2_xattr_bucket *bucket;
203 int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
205 BUG_ON(blks > OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET);
207 bucket = kzalloc(sizeof(struct ocfs2_xattr_bucket), GFP_NOFS);
209 bucket->bu_inode = inode;
210 bucket->bu_blocks = blks;
216 static void ocfs2_xattr_bucket_relse(struct ocfs2_xattr_bucket *bucket)
220 for (i = 0; i < bucket->bu_blocks; i++) {
221 brelse(bucket->bu_bhs[i]);
222 bucket->bu_bhs[i] = NULL;
226 static void ocfs2_xattr_bucket_free(struct ocfs2_xattr_bucket *bucket)
229 ocfs2_xattr_bucket_relse(bucket);
230 bucket->bu_inode = NULL;
236 * A bucket that has never been written to disk doesn't need to be
237 * read. We just need the buffer_heads. Don't call this for
238 * buckets that are already on disk. ocfs2_read_xattr_bucket() initializes
241 static int ocfs2_init_xattr_bucket(struct ocfs2_xattr_bucket *bucket,
246 for (i = 0; i < bucket->bu_blocks; i++) {
247 bucket->bu_bhs[i] = sb_getblk(bucket->bu_inode->i_sb,
249 if (!bucket->bu_bhs[i]) {
255 if (!ocfs2_buffer_uptodate(bucket->bu_inode,
257 ocfs2_set_new_buffer_uptodate(bucket->bu_inode,
262 ocfs2_xattr_bucket_relse(bucket);
266 /* Read the xattr bucket at xb_blkno */
267 static int ocfs2_read_xattr_bucket(struct ocfs2_xattr_bucket *bucket,
272 rc = ocfs2_read_blocks(bucket->bu_inode, xb_blkno,
273 bucket->bu_blocks, bucket->bu_bhs, 0,
276 ocfs2_xattr_bucket_relse(bucket);
280 static int ocfs2_xattr_bucket_journal_access(handle_t *handle,
281 struct ocfs2_xattr_bucket *bucket,
286 for (i = 0; i < bucket->bu_blocks; i++) {
287 rc = ocfs2_journal_access(handle, bucket->bu_inode,
288 bucket->bu_bhs[i], type);
298 static void ocfs2_xattr_bucket_journal_dirty(handle_t *handle,
299 struct ocfs2_xattr_bucket *bucket)
303 for (i = 0; i < bucket->bu_blocks; i++)
304 ocfs2_journal_dirty(handle, bucket->bu_bhs[i]);
307 static void ocfs2_xattr_bucket_copy_data(struct ocfs2_xattr_bucket *dest,
308 struct ocfs2_xattr_bucket *src)
311 int blocksize = src->bu_inode->i_sb->s_blocksize;
313 BUG_ON(dest->bu_blocks != src->bu_blocks);
314 BUG_ON(dest->bu_inode != src->bu_inode);
316 for (i = 0; i < src->bu_blocks; i++) {
317 memcpy(bucket_block(dest, i), bucket_block(src, i),
322 static int ocfs2_validate_xattr_block(struct super_block *sb,
323 struct buffer_head *bh)
325 struct ocfs2_xattr_block *xb =
326 (struct ocfs2_xattr_block *)bh->b_data;
328 mlog(0, "Validating xattr block %llu\n",
329 (unsigned long long)bh->b_blocknr);
331 if (!OCFS2_IS_VALID_XATTR_BLOCK(xb)) {
333 "Extended attribute block #%llu has bad "
335 (unsigned long long)bh->b_blocknr, 7,
340 if (le64_to_cpu(xb->xb_blkno) != bh->b_blocknr) {
342 "Extended attribute block #%llu has an "
343 "invalid xb_blkno of %llu",
344 (unsigned long long)bh->b_blocknr,
345 (unsigned long long)le64_to_cpu(xb->xb_blkno));
349 if (le32_to_cpu(xb->xb_fs_generation) != OCFS2_SB(sb)->fs_generation) {
351 "Extended attribute block #%llu has an invalid "
352 "xb_fs_generation of #%u",
353 (unsigned long long)bh->b_blocknr,
354 le32_to_cpu(xb->xb_fs_generation));
361 static int ocfs2_read_xattr_block(struct inode *inode, u64 xb_blkno,
362 struct buffer_head **bh)
365 struct buffer_head *tmp = *bh;
367 rc = ocfs2_read_block(inode, xb_blkno, &tmp,
368 ocfs2_validate_xattr_block);
370 /* If ocfs2_read_block() got us a new bh, pass it up. */
377 static inline const char *ocfs2_xattr_prefix(int name_index)
379 struct xattr_handler *handler = NULL;
381 if (name_index > 0 && name_index < OCFS2_XATTR_MAX)
382 handler = ocfs2_xattr_handler_map[name_index];
384 return handler ? handler->prefix : NULL;
387 static u32 ocfs2_xattr_name_hash(struct inode *inode,
391 /* Get hash value of uuid from super block */
392 u32 hash = OCFS2_SB(inode->i_sb)->uuid_hash;
395 /* hash extended attribute name */
396 for (i = 0; i < name_len; i++) {
397 hash = (hash << OCFS2_HASH_SHIFT) ^
398 (hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^
406 * ocfs2_xattr_hash_entry()
408 * Compute the hash of an extended attribute.
410 static void ocfs2_xattr_hash_entry(struct inode *inode,
411 struct ocfs2_xattr_header *header,
412 struct ocfs2_xattr_entry *entry)
415 char *name = (char *)header + le16_to_cpu(entry->xe_name_offset);
417 hash = ocfs2_xattr_name_hash(inode, name, entry->xe_name_len);
418 entry->xe_name_hash = cpu_to_le32(hash);
423 static int ocfs2_xattr_entry_real_size(int name_len, size_t value_len)
427 if (value_len <= OCFS2_XATTR_INLINE_SIZE)
428 size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(value_len);
430 size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE;
431 size += sizeof(struct ocfs2_xattr_entry);
436 int ocfs2_calc_security_init(struct inode *dir,
437 struct ocfs2_security_xattr_info *si,
440 struct ocfs2_alloc_context **xattr_ac)
443 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
444 int s_size = ocfs2_xattr_entry_real_size(strlen(si->name),
448 * The max space of security xattr taken inline is
449 * 256(name) + 80(value) + 16(entry) = 352 bytes,
450 * So reserve one metadata block for it is ok.
452 if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE ||
453 s_size > OCFS2_XATTR_FREE_IN_IBODY) {
454 ret = ocfs2_reserve_new_metadata_blocks(osb, 1, xattr_ac);
459 *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS;
462 /* reserve clusters for xattr value which will be set in B tree*/
463 if (si->value_len > OCFS2_XATTR_INLINE_SIZE)
464 *want_clusters += ocfs2_clusters_for_bytes(dir->i_sb,
469 int ocfs2_calc_xattr_init(struct inode *dir,
470 struct buffer_head *dir_bh,
472 struct ocfs2_security_xattr_info *si,
475 struct ocfs2_alloc_context **xattr_ac)
478 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
484 s_size = ocfs2_xattr_entry_real_size(strlen(si->name),
487 if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) {
488 acl_len = ocfs2_xattr_get_nolock(dir, dir_bh,
489 OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT,
492 a_size = ocfs2_xattr_entry_real_size(0, acl_len);
495 } else if (acl_len != 0 && acl_len != -ENODATA) {
501 if (!(s_size + a_size))
505 * The max space of security xattr taken inline is
506 * 256(name) + 80(value) + 16(entry) = 352 bytes,
507 * The max space of acl xattr taken inline is
508 * 80(value) + 16(entry) * 2(if directory) = 192 bytes,
509 * when blocksize = 512, may reserve one more cluser for
510 * xattr bucket, otherwise reserve one metadata block
513 if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE ||
514 (s_size + a_size) > OCFS2_XATTR_FREE_IN_IBODY) {
515 ret = ocfs2_reserve_new_metadata_blocks(osb, 1, xattr_ac);
520 *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS;
523 if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE &&
524 (s_size + a_size) > OCFS2_XATTR_FREE_IN_BLOCK(dir)) {
526 *xattr_credits += ocfs2_blocks_per_xattr_bucket(dir->i_sb);
529 /* reserve clusters for xattr value which will be set in B tree*/
530 if (si->enable && si->value_len > OCFS2_XATTR_INLINE_SIZE)
531 *want_clusters += ocfs2_clusters_for_bytes(dir->i_sb,
533 if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL &&
534 acl_len > OCFS2_XATTR_INLINE_SIZE) {
535 *want_clusters += ocfs2_clusters_for_bytes(dir->i_sb, acl_len);
537 *want_clusters += ocfs2_clusters_for_bytes(dir->i_sb,
544 static int ocfs2_xattr_extend_allocation(struct inode *inode,
546 struct buffer_head *xattr_bh,
547 struct ocfs2_xattr_value_root *xv,
548 struct ocfs2_xattr_set_ctxt *ctxt)
551 handle_t *handle = ctxt->handle;
552 enum ocfs2_alloc_restarted why;
553 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
554 u32 prev_clusters, logical_start = le32_to_cpu(xv->xr_clusters);
555 struct ocfs2_extent_tree et;
557 mlog(0, "(clusters_to_add for xattr= %u)\n", clusters_to_add);
559 ocfs2_init_xattr_value_extent_tree(&et, inode, xattr_bh, xv);
561 status = ocfs2_journal_access(handle, inode, xattr_bh,
562 OCFS2_JOURNAL_ACCESS_WRITE);
568 prev_clusters = le32_to_cpu(xv->xr_clusters);
569 status = ocfs2_add_clusters_in_btree(osb,
584 status = ocfs2_journal_dirty(handle, xattr_bh);
590 clusters_to_add -= le32_to_cpu(xv->xr_clusters) - prev_clusters;
593 * We should have already allocated enough space before the transaction,
594 * so no need to restart.
596 BUG_ON(why != RESTART_NONE || clusters_to_add);
603 static int __ocfs2_remove_xattr_range(struct inode *inode,
604 struct buffer_head *root_bh,
605 struct ocfs2_xattr_value_root *xv,
606 u32 cpos, u32 phys_cpos, u32 len,
607 struct ocfs2_xattr_set_ctxt *ctxt)
610 u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos);
611 handle_t *handle = ctxt->handle;
612 struct ocfs2_extent_tree et;
614 ocfs2_init_xattr_value_extent_tree(&et, inode, root_bh, xv);
616 ret = ocfs2_journal_access(handle, inode, root_bh,
617 OCFS2_JOURNAL_ACCESS_WRITE);
623 ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, ctxt->meta_ac,
630 le32_add_cpu(&xv->xr_clusters, -len);
632 ret = ocfs2_journal_dirty(handle, root_bh);
638 ret = ocfs2_cache_cluster_dealloc(&ctxt->dealloc, phys_blkno, len);
646 static int ocfs2_xattr_shrink_size(struct inode *inode,
649 struct buffer_head *root_bh,
650 struct ocfs2_xattr_value_root *xv,
651 struct ocfs2_xattr_set_ctxt *ctxt)
654 u32 trunc_len, cpos, phys_cpos, alloc_size;
657 if (old_clusters <= new_clusters)
661 trunc_len = old_clusters - new_clusters;
663 ret = ocfs2_xattr_get_clusters(inode, cpos, &phys_cpos,
664 &alloc_size, &xv->xr_list);
670 if (alloc_size > trunc_len)
671 alloc_size = trunc_len;
673 ret = __ocfs2_remove_xattr_range(inode, root_bh, xv, cpos,
674 phys_cpos, alloc_size,
681 block = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos);
682 ocfs2_remove_xattr_clusters_from_cache(inode, block,
685 trunc_len -= alloc_size;
692 static int ocfs2_xattr_value_truncate(struct inode *inode,
693 struct buffer_head *root_bh,
694 struct ocfs2_xattr_value_root *xv,
696 struct ocfs2_xattr_set_ctxt *ctxt)
699 u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, len);
700 u32 old_clusters = le32_to_cpu(xv->xr_clusters);
702 if (new_clusters == old_clusters)
705 if (new_clusters > old_clusters)
706 ret = ocfs2_xattr_extend_allocation(inode,
707 new_clusters - old_clusters,
710 ret = ocfs2_xattr_shrink_size(inode,
711 old_clusters, new_clusters,
717 static int ocfs2_xattr_list_entry(char *buffer, size_t size,
718 size_t *result, const char *prefix,
719 const char *name, int name_len)
721 char *p = buffer + *result;
722 int prefix_len = strlen(prefix);
723 int total_len = prefix_len + name_len + 1;
725 *result += total_len;
727 /* we are just looking for how big our buffer needs to be */
734 memcpy(p, prefix, prefix_len);
735 memcpy(p + prefix_len, name, name_len);
736 p[prefix_len + name_len] = '\0';
741 static int ocfs2_xattr_list_entries(struct inode *inode,
742 struct ocfs2_xattr_header *header,
743 char *buffer, size_t buffer_size)
747 const char *prefix, *name;
749 for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) {
750 struct ocfs2_xattr_entry *entry = &header->xh_entries[i];
751 type = ocfs2_xattr_get_type(entry);
752 prefix = ocfs2_xattr_prefix(type);
755 name = (const char *)header +
756 le16_to_cpu(entry->xe_name_offset);
758 ret = ocfs2_xattr_list_entry(buffer, buffer_size,
759 &result, prefix, name,
769 static int ocfs2_xattr_ibody_list(struct inode *inode,
770 struct ocfs2_dinode *di,
774 struct ocfs2_xattr_header *header = NULL;
775 struct ocfs2_inode_info *oi = OCFS2_I(inode);
778 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL))
781 header = (struct ocfs2_xattr_header *)
782 ((void *)di + inode->i_sb->s_blocksize -
783 le16_to_cpu(di->i_xattr_inline_size));
785 ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size);
790 static int ocfs2_xattr_block_list(struct inode *inode,
791 struct ocfs2_dinode *di,
795 struct buffer_head *blk_bh = NULL;
796 struct ocfs2_xattr_block *xb;
799 if (!di->i_xattr_loc)
802 ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc),
809 xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
810 if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) {
811 struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header;
812 ret = ocfs2_xattr_list_entries(inode, header,
813 buffer, buffer_size);
815 struct ocfs2_xattr_tree_root *xt = &xb->xb_attrs.xb_root;
816 ret = ocfs2_xattr_tree_list_index_block(inode, xt,
817 buffer, buffer_size);
825 ssize_t ocfs2_listxattr(struct dentry *dentry,
829 int ret = 0, i_ret = 0, b_ret = 0;
830 struct buffer_head *di_bh = NULL;
831 struct ocfs2_dinode *di = NULL;
832 struct ocfs2_inode_info *oi = OCFS2_I(dentry->d_inode);
834 if (!ocfs2_supports_xattr(OCFS2_SB(dentry->d_sb)))
837 if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL))
840 ret = ocfs2_inode_lock(dentry->d_inode, &di_bh, 0);
846 di = (struct ocfs2_dinode *)di_bh->b_data;
848 down_read(&oi->ip_xattr_sem);
849 i_ret = ocfs2_xattr_ibody_list(dentry->d_inode, di, buffer, size);
857 b_ret = ocfs2_xattr_block_list(dentry->d_inode, di,
862 up_read(&oi->ip_xattr_sem);
863 ocfs2_inode_unlock(dentry->d_inode, 0);
867 return i_ret + b_ret;
870 static int ocfs2_xattr_find_entry(int name_index,
872 struct ocfs2_xattr_search *xs)
874 struct ocfs2_xattr_entry *entry;
881 name_len = strlen(name);
883 for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) {
884 cmp = name_index - ocfs2_xattr_get_type(entry);
886 cmp = name_len - entry->xe_name_len;
888 cmp = memcmp(name, (xs->base +
889 le16_to_cpu(entry->xe_name_offset)),
897 return cmp ? -ENODATA : 0;
900 static int ocfs2_xattr_get_value_outside(struct inode *inode,
901 struct ocfs2_xattr_value_root *xv,
905 u32 cpos, p_cluster, num_clusters, bpc, clusters;
908 size_t cplen, blocksize;
909 struct buffer_head *bh = NULL;
910 struct ocfs2_extent_list *el;
913 clusters = le32_to_cpu(xv->xr_clusters);
914 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1);
915 blocksize = inode->i_sb->s_blocksize;
918 while (cpos < clusters) {
919 ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster,
926 blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster);
927 /* Copy ocfs2_xattr_value */
928 for (i = 0; i < num_clusters * bpc; i++, blkno++) {
929 ret = ocfs2_read_block(inode, blkno, &bh, NULL);
935 cplen = len >= blocksize ? blocksize : len;
936 memcpy(buffer, bh->b_data, cplen);
945 cpos += num_clusters;
951 static int ocfs2_xattr_ibody_get(struct inode *inode,
956 struct ocfs2_xattr_search *xs)
958 struct ocfs2_inode_info *oi = OCFS2_I(inode);
959 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
960 struct ocfs2_xattr_value_root *xv;
964 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL))
967 xs->end = (void *)di + inode->i_sb->s_blocksize;
968 xs->header = (struct ocfs2_xattr_header *)
969 (xs->end - le16_to_cpu(di->i_xattr_inline_size));
970 xs->base = (void *)xs->header;
971 xs->here = xs->header->xh_entries;
973 ret = ocfs2_xattr_find_entry(name_index, name, xs);
976 size = le64_to_cpu(xs->here->xe_value_size);
978 if (size > buffer_size)
980 if (ocfs2_xattr_is_local(xs->here)) {
981 memcpy(buffer, (void *)xs->base +
982 le16_to_cpu(xs->here->xe_name_offset) +
983 OCFS2_XATTR_SIZE(xs->here->xe_name_len), size);
985 xv = (struct ocfs2_xattr_value_root *)
986 (xs->base + le16_to_cpu(
987 xs->here->xe_name_offset) +
988 OCFS2_XATTR_SIZE(xs->here->xe_name_len));
989 ret = ocfs2_xattr_get_value_outside(inode, xv,
1001 static int ocfs2_xattr_block_get(struct inode *inode,
1006 struct ocfs2_xattr_search *xs)
1008 struct ocfs2_xattr_block *xb;
1009 struct ocfs2_xattr_value_root *xv;
1011 int ret = -ENODATA, name_offset, name_len, block_off, i;
1013 xs->bucket = ocfs2_xattr_bucket_new(inode);
1020 ret = ocfs2_xattr_block_find(inode, name_index, name, xs);
1026 if (xs->not_found) {
1031 xb = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data;
1032 size = le64_to_cpu(xs->here->xe_value_size);
1035 if (size > buffer_size)
1038 name_offset = le16_to_cpu(xs->here->xe_name_offset);
1039 name_len = OCFS2_XATTR_SIZE(xs->here->xe_name_len);
1040 i = xs->here - xs->header->xh_entries;
1042 if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) {
1043 ret = ocfs2_xattr_bucket_get_name_value(inode,
1044 bucket_xh(xs->bucket),
1048 xs->base = bucket_block(xs->bucket, block_off);
1050 if (ocfs2_xattr_is_local(xs->here)) {
1051 memcpy(buffer, (void *)xs->base +
1052 name_offset + name_len, size);
1054 xv = (struct ocfs2_xattr_value_root *)
1055 (xs->base + name_offset + name_len);
1056 ret = ocfs2_xattr_get_value_outside(inode, xv,
1066 ocfs2_xattr_bucket_free(xs->bucket);
1068 brelse(xs->xattr_bh);
1069 xs->xattr_bh = NULL;
1073 int ocfs2_xattr_get_nolock(struct inode *inode,
1074 struct buffer_head *di_bh,
1081 struct ocfs2_dinode *di = NULL;
1082 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1083 struct ocfs2_xattr_search xis = {
1084 .not_found = -ENODATA,
1086 struct ocfs2_xattr_search xbs = {
1087 .not_found = -ENODATA,
1090 if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb)))
1093 if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL))
1096 xis.inode_bh = xbs.inode_bh = di_bh;
1097 di = (struct ocfs2_dinode *)di_bh->b_data;
1099 down_read(&oi->ip_xattr_sem);
1100 ret = ocfs2_xattr_ibody_get(inode, name_index, name, buffer,
1102 if (ret == -ENODATA && di->i_xattr_loc)
1103 ret = ocfs2_xattr_block_get(inode, name_index, name, buffer,
1105 up_read(&oi->ip_xattr_sem);
1110 /* ocfs2_xattr_get()
1112 * Copy an extended attribute into the buffer provided.
1113 * Buffer is NULL to compute the size of buffer required.
1115 static int ocfs2_xattr_get(struct inode *inode,
1122 struct buffer_head *di_bh = NULL;
1124 ret = ocfs2_inode_lock(inode, &di_bh, 0);
1129 ret = ocfs2_xattr_get_nolock(inode, di_bh, name_index,
1130 name, buffer, buffer_size);
1132 ocfs2_inode_unlock(inode, 0);
1139 static int __ocfs2_xattr_set_value_outside(struct inode *inode,
1141 struct ocfs2_xattr_value_root *xv,
1145 int ret = 0, i, cp_len, credits;
1146 u16 blocksize = inode->i_sb->s_blocksize;
1147 u32 p_cluster, num_clusters;
1148 u32 cpos = 0, bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1);
1149 u32 clusters = ocfs2_clusters_for_bytes(inode->i_sb, value_len);
1151 struct buffer_head *bh = NULL;
1153 BUG_ON(clusters > le32_to_cpu(xv->xr_clusters));
1156 * In __ocfs2_xattr_set_value_outside has already been dirtied,
1157 * so we don't need to worry about whether ocfs2_extend_trans
1158 * will create a new transactio for us or not.
1160 credits = clusters * bpc;
1161 ret = ocfs2_extend_trans(handle, credits);
1167 while (cpos < clusters) {
1168 ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster,
1169 &num_clusters, &xv->xr_list);
1175 blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster);
1177 for (i = 0; i < num_clusters * bpc; i++, blkno++) {
1178 ret = ocfs2_read_block(inode, blkno, &bh, NULL);
1184 ret = ocfs2_journal_access(handle,
1187 OCFS2_JOURNAL_ACCESS_WRITE);
1193 cp_len = value_len > blocksize ? blocksize : value_len;
1194 memcpy(bh->b_data, value, cp_len);
1195 value_len -= cp_len;
1197 if (cp_len < blocksize)
1198 memset(bh->b_data + cp_len, 0,
1199 blocksize - cp_len);
1201 ret = ocfs2_journal_dirty(handle, bh);
1210 * XXX: do we need to empty all the following
1211 * blocks in this cluster?
1216 cpos += num_clusters;
1224 static int ocfs2_xattr_cleanup(struct inode *inode,
1226 struct ocfs2_xattr_info *xi,
1227 struct ocfs2_xattr_search *xs,
1231 size_t name_len = strlen(xi->name);
1232 void *val = xs->base + offs;
1233 size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE;
1235 ret = ocfs2_journal_access(handle, inode, xs->xattr_bh,
1236 OCFS2_JOURNAL_ACCESS_WRITE);
1241 /* Decrease xattr count */
1242 le16_add_cpu(&xs->header->xh_count, -1);
1243 /* Remove the xattr entry and tree root which has already be set*/
1244 memset((void *)xs->here, 0, sizeof(struct ocfs2_xattr_entry));
1245 memset(val, 0, size);
1247 ret = ocfs2_journal_dirty(handle, xs->xattr_bh);
1254 static int ocfs2_xattr_update_entry(struct inode *inode,
1256 struct ocfs2_xattr_info *xi,
1257 struct ocfs2_xattr_search *xs,
1262 ret = ocfs2_journal_access(handle, inode, xs->xattr_bh,
1263 OCFS2_JOURNAL_ACCESS_WRITE);
1269 xs->here->xe_name_offset = cpu_to_le16(offs);
1270 xs->here->xe_value_size = cpu_to_le64(xi->value_len);
1271 if (xi->value_len <= OCFS2_XATTR_INLINE_SIZE)
1272 ocfs2_xattr_set_local(xs->here, 1);
1274 ocfs2_xattr_set_local(xs->here, 0);
1275 ocfs2_xattr_hash_entry(inode, xs->header, xs->here);
1277 ret = ocfs2_journal_dirty(handle, xs->xattr_bh);
1285 * ocfs2_xattr_set_value_outside()
1287 * Set large size value in B tree.
1289 static int ocfs2_xattr_set_value_outside(struct inode *inode,
1290 struct ocfs2_xattr_info *xi,
1291 struct ocfs2_xattr_search *xs,
1292 struct ocfs2_xattr_set_ctxt *ctxt,
1295 size_t name_len = strlen(xi->name);
1296 void *val = xs->base + offs;
1297 struct ocfs2_xattr_value_root *xv = NULL;
1298 size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE;
1301 memset(val, 0, size);
1302 memcpy(val, xi->name, name_len);
1303 xv = (struct ocfs2_xattr_value_root *)
1304 (val + OCFS2_XATTR_SIZE(name_len));
1305 xv->xr_clusters = 0;
1306 xv->xr_last_eb_blk = 0;
1307 xv->xr_list.l_tree_depth = 0;
1308 xv->xr_list.l_count = cpu_to_le16(1);
1309 xv->xr_list.l_next_free_rec = 0;
1311 ret = ocfs2_xattr_value_truncate(inode, xs->xattr_bh, xv,
1312 xi->value_len, ctxt);
1317 ret = ocfs2_xattr_update_entry(inode, ctxt->handle, xi, xs, offs);
1322 ret = __ocfs2_xattr_set_value_outside(inode, ctxt->handle, xv,
1323 xi->value, xi->value_len);
1331 * ocfs2_xattr_set_entry_local()
1333 * Set, replace or remove extended attribute in local.
1335 static void ocfs2_xattr_set_entry_local(struct inode *inode,
1336 struct ocfs2_xattr_info *xi,
1337 struct ocfs2_xattr_search *xs,
1338 struct ocfs2_xattr_entry *last,
1341 size_t name_len = strlen(xi->name);
1344 if (xi->value && xs->not_found) {
1345 /* Insert the new xattr entry. */
1346 le16_add_cpu(&xs->header->xh_count, 1);
1347 ocfs2_xattr_set_type(last, xi->name_index);
1348 ocfs2_xattr_set_local(last, 1);
1349 last->xe_name_len = name_len;
1355 first_val = xs->base + min_offs;
1356 offs = le16_to_cpu(xs->here->xe_name_offset);
1357 val = xs->base + offs;
1359 if (le64_to_cpu(xs->here->xe_value_size) >
1360 OCFS2_XATTR_INLINE_SIZE)
1361 size = OCFS2_XATTR_SIZE(name_len) +
1362 OCFS2_XATTR_ROOT_SIZE;
1364 size = OCFS2_XATTR_SIZE(name_len) +
1365 OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size));
1367 if (xi->value && size == OCFS2_XATTR_SIZE(name_len) +
1368 OCFS2_XATTR_SIZE(xi->value_len)) {
1369 /* The old and the new value have the
1370 same size. Just replace the value. */
1371 ocfs2_xattr_set_local(xs->here, 1);
1372 xs->here->xe_value_size = cpu_to_le64(xi->value_len);
1373 /* Clear value bytes. */
1374 memset(val + OCFS2_XATTR_SIZE(name_len),
1376 OCFS2_XATTR_SIZE(xi->value_len));
1377 memcpy(val + OCFS2_XATTR_SIZE(name_len),
1382 /* Remove the old name+value. */
1383 memmove(first_val + size, first_val, val - first_val);
1384 memset(first_val, 0, size);
1385 xs->here->xe_name_hash = 0;
1386 xs->here->xe_name_offset = 0;
1387 ocfs2_xattr_set_local(xs->here, 1);
1388 xs->here->xe_value_size = 0;
1392 /* Adjust all value offsets. */
1393 last = xs->header->xh_entries;
1394 for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) {
1395 size_t o = le16_to_cpu(last->xe_name_offset);
1398 last->xe_name_offset = cpu_to_le16(o + size);
1403 /* Remove the old entry. */
1405 memmove(xs->here, xs->here + 1,
1406 (void *)last - (void *)xs->here);
1407 memset(last, 0, sizeof(struct ocfs2_xattr_entry));
1408 le16_add_cpu(&xs->header->xh_count, -1);
1412 /* Insert the new name+value. */
1413 size_t size = OCFS2_XATTR_SIZE(name_len) +
1414 OCFS2_XATTR_SIZE(xi->value_len);
1415 void *val = xs->base + min_offs - size;
1417 xs->here->xe_name_offset = cpu_to_le16(min_offs - size);
1418 memset(val, 0, size);
1419 memcpy(val, xi->name, name_len);
1420 memcpy(val + OCFS2_XATTR_SIZE(name_len),
1423 xs->here->xe_value_size = cpu_to_le64(xi->value_len);
1424 ocfs2_xattr_set_local(xs->here, 1);
1425 ocfs2_xattr_hash_entry(inode, xs->header, xs->here);
1432 * ocfs2_xattr_set_entry()
1434 * Set extended attribute entry into inode or block.
1436 * If extended attribute value size > OCFS2_XATTR_INLINE_SIZE,
1437 * We first insert tree root(ocfs2_xattr_value_root) with set_entry_local(),
1438 * then set value in B tree with set_value_outside().
1440 static int ocfs2_xattr_set_entry(struct inode *inode,
1441 struct ocfs2_xattr_info *xi,
1442 struct ocfs2_xattr_search *xs,
1443 struct ocfs2_xattr_set_ctxt *ctxt,
1446 struct ocfs2_xattr_entry *last;
1447 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1448 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
1449 size_t min_offs = xs->end - xs->base, name_len = strlen(xi->name);
1451 handle_t *handle = ctxt->handle;
1453 struct ocfs2_xattr_info xi_l = {
1454 .name_index = xi->name_index,
1457 .value_len = xi->value_len,
1460 /* Compute min_offs, last and free space. */
1461 last = xs->header->xh_entries;
1463 for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) {
1464 size_t offs = le16_to_cpu(last->xe_name_offset);
1465 if (offs < min_offs)
1470 free = min_offs - ((void *)last - xs->base) - sizeof(__u32);
1474 if (!xs->not_found) {
1476 if (ocfs2_xattr_is_local(xs->here))
1477 size = OCFS2_XATTR_SIZE(name_len) +
1478 OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size));
1480 size = OCFS2_XATTR_SIZE(name_len) +
1481 OCFS2_XATTR_ROOT_SIZE;
1482 free += (size + sizeof(struct ocfs2_xattr_entry));
1484 /* Check free space in inode or block */
1485 if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
1486 if (free < sizeof(struct ocfs2_xattr_entry) +
1487 OCFS2_XATTR_SIZE(name_len) +
1488 OCFS2_XATTR_ROOT_SIZE) {
1492 size_l = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE;
1493 xi_l.value = (void *)&def_xv;
1494 xi_l.value_len = OCFS2_XATTR_ROOT_SIZE;
1495 } else if (xi->value) {
1496 if (free < sizeof(struct ocfs2_xattr_entry) +
1497 OCFS2_XATTR_SIZE(name_len) +
1498 OCFS2_XATTR_SIZE(xi->value_len)) {
1504 if (!xs->not_found) {
1505 /* For existing extended attribute */
1506 size_t size = OCFS2_XATTR_SIZE(name_len) +
1507 OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size));
1508 size_t offs = le16_to_cpu(xs->here->xe_name_offset);
1509 void *val = xs->base + offs;
1511 if (ocfs2_xattr_is_local(xs->here) && size == size_l) {
1512 /* Replace existing local xattr with tree root */
1513 ret = ocfs2_xattr_set_value_outside(inode, xi, xs,
1518 } else if (!ocfs2_xattr_is_local(xs->here)) {
1519 /* For existing xattr which has value outside */
1520 struct ocfs2_xattr_value_root *xv = NULL;
1521 xv = (struct ocfs2_xattr_value_root *)(val +
1522 OCFS2_XATTR_SIZE(name_len));
1524 if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
1526 * If new value need set outside also,
1527 * first truncate old value to new value,
1528 * then set new value with set_value_outside().
1530 ret = ocfs2_xattr_value_truncate(inode,
1540 ret = ocfs2_xattr_update_entry(inode,
1550 ret = __ocfs2_xattr_set_value_outside(inode,
1560 * If new value need set in local,
1561 * just trucate old value to zero.
1563 ret = ocfs2_xattr_value_truncate(inode,
1574 ret = ocfs2_journal_access(handle, inode, xs->inode_bh,
1575 OCFS2_JOURNAL_ACCESS_WRITE);
1581 if (!(flag & OCFS2_INLINE_XATTR_FL)) {
1582 ret = ocfs2_journal_access(handle, inode, xs->xattr_bh,
1583 OCFS2_JOURNAL_ACCESS_WRITE);
1591 * Set value in local, include set tree root in local.
1592 * This is the first step for value size >INLINE_SIZE.
1594 ocfs2_xattr_set_entry_local(inode, &xi_l, xs, last, min_offs);
1596 if (!(flag & OCFS2_INLINE_XATTR_FL)) {
1597 ret = ocfs2_journal_dirty(handle, xs->xattr_bh);
1604 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) &&
1605 (flag & OCFS2_INLINE_XATTR_FL)) {
1606 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1607 unsigned int xattrsize = osb->s_xattr_inline_size;
1610 * Adjust extent record count or inline data size
1611 * to reserve space for extended attribute.
1613 if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
1614 struct ocfs2_inline_data *idata = &di->id2.i_data;
1615 le16_add_cpu(&idata->id_count, -xattrsize);
1616 } else if (!(ocfs2_inode_is_fast_symlink(inode))) {
1617 struct ocfs2_extent_list *el = &di->id2.i_list;
1618 le16_add_cpu(&el->l_count, -(xattrsize /
1619 sizeof(struct ocfs2_extent_rec)));
1621 di->i_xattr_inline_size = cpu_to_le16(xattrsize);
1623 /* Update xattr flag */
1624 spin_lock(&oi->ip_lock);
1625 oi->ip_dyn_features |= flag;
1626 di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features);
1627 spin_unlock(&oi->ip_lock);
1628 /* Update inode ctime */
1629 inode->i_ctime = CURRENT_TIME;
1630 di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
1631 di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
1633 ret = ocfs2_journal_dirty(handle, xs->inode_bh);
1637 if (!ret && xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
1639 * Set value outside in B tree.
1640 * This is the second step for value size > INLINE_SIZE.
1642 size_t offs = le16_to_cpu(xs->here->xe_name_offset);
1643 ret = ocfs2_xattr_set_value_outside(inode, xi, xs, ctxt, offs);
1649 * If set value outside failed, we have to clean
1650 * the junk tree root we have already set in local.
1652 ret2 = ocfs2_xattr_cleanup(inode, ctxt->handle,
1662 static int ocfs2_remove_value_outside(struct inode*inode,
1663 struct buffer_head *bh,
1664 struct ocfs2_xattr_header *header)
1667 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1668 struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, };
1670 ocfs2_init_dealloc_ctxt(&ctxt.dealloc);
1672 ctxt.handle = ocfs2_start_trans(osb,
1673 ocfs2_remove_extent_credits(osb->sb));
1674 if (IS_ERR(ctxt.handle)) {
1675 ret = PTR_ERR(ctxt.handle);
1680 for (i = 0; i < le16_to_cpu(header->xh_count); i++) {
1681 struct ocfs2_xattr_entry *entry = &header->xh_entries[i];
1683 if (!ocfs2_xattr_is_local(entry)) {
1684 struct ocfs2_xattr_value_root *xv;
1687 val = (void *)header +
1688 le16_to_cpu(entry->xe_name_offset);
1689 xv = (struct ocfs2_xattr_value_root *)
1690 (val + OCFS2_XATTR_SIZE(entry->xe_name_len));
1691 ret = ocfs2_xattr_value_truncate(inode, bh, xv,
1700 ocfs2_commit_trans(osb, ctxt.handle);
1701 ocfs2_schedule_truncate_log_flush(osb, 1);
1702 ocfs2_run_deallocs(osb, &ctxt.dealloc);
1707 static int ocfs2_xattr_ibody_remove(struct inode *inode,
1708 struct buffer_head *di_bh)
1711 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
1712 struct ocfs2_xattr_header *header;
1715 header = (struct ocfs2_xattr_header *)
1716 ((void *)di + inode->i_sb->s_blocksize -
1717 le16_to_cpu(di->i_xattr_inline_size));
1719 ret = ocfs2_remove_value_outside(inode, di_bh, header);
1724 static int ocfs2_xattr_block_remove(struct inode *inode,
1725 struct buffer_head *blk_bh)
1727 struct ocfs2_xattr_block *xb;
1730 xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
1731 if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) {
1732 struct ocfs2_xattr_header *header = &(xb->xb_attrs.xb_header);
1733 ret = ocfs2_remove_value_outside(inode, blk_bh, header);
1735 ret = ocfs2_delete_xattr_index_block(inode, blk_bh);
1740 static int ocfs2_xattr_free_block(struct inode *inode,
1743 struct inode *xb_alloc_inode;
1744 struct buffer_head *xb_alloc_bh = NULL;
1745 struct buffer_head *blk_bh = NULL;
1746 struct ocfs2_xattr_block *xb;
1747 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1753 ret = ocfs2_read_xattr_block(inode, block, &blk_bh);
1759 ret = ocfs2_xattr_block_remove(inode, blk_bh);
1765 xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
1766 blk = le64_to_cpu(xb->xb_blkno);
1767 bit = le16_to_cpu(xb->xb_suballoc_bit);
1768 bg_blkno = ocfs2_which_suballoc_group(blk, bit);
1770 xb_alloc_inode = ocfs2_get_system_file_inode(osb,
1771 EXTENT_ALLOC_SYSTEM_INODE,
1772 le16_to_cpu(xb->xb_suballoc_slot));
1773 if (!xb_alloc_inode) {
1778 mutex_lock(&xb_alloc_inode->i_mutex);
1780 ret = ocfs2_inode_lock(xb_alloc_inode, &xb_alloc_bh, 1);
1786 handle = ocfs2_start_trans(osb, OCFS2_SUBALLOC_FREE);
1787 if (IS_ERR(handle)) {
1788 ret = PTR_ERR(handle);
1793 ret = ocfs2_free_suballoc_bits(handle, xb_alloc_inode, xb_alloc_bh,
1798 ocfs2_commit_trans(osb, handle);
1800 ocfs2_inode_unlock(xb_alloc_inode, 1);
1801 brelse(xb_alloc_bh);
1803 mutex_unlock(&xb_alloc_inode->i_mutex);
1804 iput(xb_alloc_inode);
1811 * ocfs2_xattr_remove()
1813 * Free extended attribute resources associated with this inode.
1815 int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh)
1817 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1818 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
1822 if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb)))
1825 if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL))
1828 if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) {
1829 ret = ocfs2_xattr_ibody_remove(inode, di_bh);
1836 if (di->i_xattr_loc) {
1837 ret = ocfs2_xattr_free_block(inode,
1838 le64_to_cpu(di->i_xattr_loc));
1845 handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)),
1846 OCFS2_INODE_UPDATE_CREDITS);
1847 if (IS_ERR(handle)) {
1848 ret = PTR_ERR(handle);
1852 ret = ocfs2_journal_access(handle, inode, di_bh,
1853 OCFS2_JOURNAL_ACCESS_WRITE);
1859 di->i_xattr_loc = 0;
1861 spin_lock(&oi->ip_lock);
1862 oi->ip_dyn_features &= ~(OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL);
1863 di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features);
1864 spin_unlock(&oi->ip_lock);
1866 ret = ocfs2_journal_dirty(handle, di_bh);
1870 ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
1875 static int ocfs2_xattr_has_space_inline(struct inode *inode,
1876 struct ocfs2_dinode *di)
1878 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1879 unsigned int xattrsize = OCFS2_SB(inode->i_sb)->s_xattr_inline_size;
1882 if (xattrsize < OCFS2_MIN_XATTR_INLINE_SIZE)
1885 if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
1886 struct ocfs2_inline_data *idata = &di->id2.i_data;
1887 free = le16_to_cpu(idata->id_count) - le64_to_cpu(di->i_size);
1888 } else if (ocfs2_inode_is_fast_symlink(inode)) {
1889 free = ocfs2_fast_symlink_chars(inode->i_sb) -
1890 le64_to_cpu(di->i_size);
1892 struct ocfs2_extent_list *el = &di->id2.i_list;
1893 free = (le16_to_cpu(el->l_count) -
1894 le16_to_cpu(el->l_next_free_rec)) *
1895 sizeof(struct ocfs2_extent_rec);
1897 if (free >= xattrsize)
1904 * ocfs2_xattr_ibody_find()
1906 * Find extended attribute in inode block and
1907 * fill search info into struct ocfs2_xattr_search.
1909 static int ocfs2_xattr_ibody_find(struct inode *inode,
1912 struct ocfs2_xattr_search *xs)
1914 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1915 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
1919 if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE)
1922 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) {
1923 down_read(&oi->ip_alloc_sem);
1924 has_space = ocfs2_xattr_has_space_inline(inode, di);
1925 up_read(&oi->ip_alloc_sem);
1930 xs->xattr_bh = xs->inode_bh;
1931 xs->end = (void *)di + inode->i_sb->s_blocksize;
1932 if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)
1933 xs->header = (struct ocfs2_xattr_header *)
1934 (xs->end - le16_to_cpu(di->i_xattr_inline_size));
1936 xs->header = (struct ocfs2_xattr_header *)
1937 (xs->end - OCFS2_SB(inode->i_sb)->s_xattr_inline_size);
1938 xs->base = (void *)xs->header;
1939 xs->here = xs->header->xh_entries;
1941 /* Find the named attribute. */
1942 if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) {
1943 ret = ocfs2_xattr_find_entry(name_index, name, xs);
1944 if (ret && ret != -ENODATA)
1946 xs->not_found = ret;
1953 * ocfs2_xattr_ibody_set()
1955 * Set, replace or remove an extended attribute into inode block.
1958 static int ocfs2_xattr_ibody_set(struct inode *inode,
1959 struct ocfs2_xattr_info *xi,
1960 struct ocfs2_xattr_search *xs,
1961 struct ocfs2_xattr_set_ctxt *ctxt)
1963 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1964 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
1967 if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE)
1970 down_write(&oi->ip_alloc_sem);
1971 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) {
1972 if (!ocfs2_xattr_has_space_inline(inode, di)) {
1978 ret = ocfs2_xattr_set_entry(inode, xi, xs, ctxt,
1979 (OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL));
1981 up_write(&oi->ip_alloc_sem);
1987 * ocfs2_xattr_block_find()
1989 * Find extended attribute in external block and
1990 * fill search info into struct ocfs2_xattr_search.
1992 static int ocfs2_xattr_block_find(struct inode *inode,
1995 struct ocfs2_xattr_search *xs)
1997 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
1998 struct buffer_head *blk_bh = NULL;
1999 struct ocfs2_xattr_block *xb;
2002 if (!di->i_xattr_loc)
2005 ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc),
2012 xs->xattr_bh = blk_bh;
2013 xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
2015 if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) {
2016 xs->header = &xb->xb_attrs.xb_header;
2017 xs->base = (void *)xs->header;
2018 xs->end = (void *)(blk_bh->b_data) + blk_bh->b_size;
2019 xs->here = xs->header->xh_entries;
2021 ret = ocfs2_xattr_find_entry(name_index, name, xs);
2023 ret = ocfs2_xattr_index_block_find(inode, blk_bh,
2027 if (ret && ret != -ENODATA) {
2028 xs->xattr_bh = NULL;
2031 xs->not_found = ret;
2040 * ocfs2_xattr_block_set()
2042 * Set, replace or remove an extended attribute into external block.
2045 static int ocfs2_xattr_block_set(struct inode *inode,
2046 struct ocfs2_xattr_info *xi,
2047 struct ocfs2_xattr_search *xs,
2048 struct ocfs2_xattr_set_ctxt *ctxt)
2050 struct buffer_head *new_bh = NULL;
2051 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
2052 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
2053 handle_t *handle = ctxt->handle;
2054 struct ocfs2_xattr_block *xblk = NULL;
2055 u16 suballoc_bit_start;
2060 if (!xs->xattr_bh) {
2061 ret = ocfs2_journal_access(handle, inode, xs->inode_bh,
2062 OCFS2_JOURNAL_ACCESS_CREATE);
2068 ret = ocfs2_claim_metadata(osb, handle, ctxt->meta_ac, 1,
2069 &suballoc_bit_start, &num_got,
2076 new_bh = sb_getblk(inode->i_sb, first_blkno);
2077 ocfs2_set_new_buffer_uptodate(inode, new_bh);
2079 ret = ocfs2_journal_access(handle, inode, new_bh,
2080 OCFS2_JOURNAL_ACCESS_CREATE);
2086 /* Initialize ocfs2_xattr_block */
2087 xs->xattr_bh = new_bh;
2088 xblk = (struct ocfs2_xattr_block *)new_bh->b_data;
2089 memset(xblk, 0, inode->i_sb->s_blocksize);
2090 strcpy((void *)xblk, OCFS2_XATTR_BLOCK_SIGNATURE);
2091 xblk->xb_suballoc_slot = cpu_to_le16(osb->slot_num);
2092 xblk->xb_suballoc_bit = cpu_to_le16(suballoc_bit_start);
2093 xblk->xb_fs_generation = cpu_to_le32(osb->fs_generation);
2094 xblk->xb_blkno = cpu_to_le64(first_blkno);
2096 xs->header = &xblk->xb_attrs.xb_header;
2097 xs->base = (void *)xs->header;
2098 xs->end = (void *)xblk + inode->i_sb->s_blocksize;
2099 xs->here = xs->header->xh_entries;
2101 ret = ocfs2_journal_dirty(handle, new_bh);
2106 di->i_xattr_loc = cpu_to_le64(first_blkno);
2107 ocfs2_journal_dirty(handle, xs->inode_bh);
2109 xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data;
2111 if (!(le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED)) {
2112 /* Set extended attribute into external block */
2113 ret = ocfs2_xattr_set_entry(inode, xi, xs, ctxt,
2114 OCFS2_HAS_XATTR_FL);
2115 if (!ret || ret != -ENOSPC)
2118 ret = ocfs2_xattr_create_index_block(inode, xs, ctxt);
2123 ret = ocfs2_xattr_set_entry_index_block(inode, xi, xs, ctxt);
2130 /* Check whether the new xattr can be inserted into the inode. */
2131 static int ocfs2_xattr_can_be_in_inode(struct inode *inode,
2132 struct ocfs2_xattr_info *xi,
2133 struct ocfs2_xattr_search *xs)
2136 struct ocfs2_xattr_entry *last;
2138 size_t min_offs = xs->end - xs->base;
2143 last = xs->header->xh_entries;
2145 for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) {
2146 size_t offs = le16_to_cpu(last->xe_name_offset);
2147 if (offs < min_offs)
2152 free = min_offs - ((void *)last - xs->base) - sizeof(__u32);
2156 BUG_ON(!xs->not_found);
2158 if (xi->value_len > OCFS2_XATTR_INLINE_SIZE)
2159 value_size = OCFS2_XATTR_ROOT_SIZE;
2161 value_size = OCFS2_XATTR_SIZE(xi->value_len);
2163 if (free >= sizeof(struct ocfs2_xattr_entry) +
2164 OCFS2_XATTR_SIZE(strlen(xi->name)) + value_size)
2170 static int ocfs2_calc_xattr_set_need(struct inode *inode,
2171 struct ocfs2_dinode *di,
2172 struct ocfs2_xattr_info *xi,
2173 struct ocfs2_xattr_search *xis,
2174 struct ocfs2_xattr_search *xbs,
2179 int ret = 0, old_in_xb = 0;
2180 int clusters_add = 0, meta_add = 0, credits = 0;
2181 struct buffer_head *bh = NULL;
2182 struct ocfs2_xattr_block *xb = NULL;
2183 struct ocfs2_xattr_entry *xe = NULL;
2184 struct ocfs2_xattr_value_root *xv = NULL;
2186 int name_offset, name_len = 0;
2187 u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb,
2191 if (xis->not_found && xbs->not_found) {
2192 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
2194 if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
2195 clusters_add += new_clusters;
2196 credits += ocfs2_calc_extend_credits(inode->i_sb,
2204 if (!xis->not_found) {
2206 name_offset = le16_to_cpu(xe->xe_name_offset);
2207 name_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
2209 credits += OCFS2_INODE_UPDATE_CREDITS;
2211 int i, block_off = 0;
2212 xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data;
2214 name_offset = le16_to_cpu(xe->xe_name_offset);
2215 name_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
2216 i = xbs->here - xbs->header->xh_entries;
2219 if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) {
2220 ret = ocfs2_xattr_bucket_get_name_value(inode,
2221 bucket_xh(xbs->bucket),
2224 base = bucket_block(xbs->bucket, block_off);
2225 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
2228 credits += OCFS2_XATTR_BLOCK_UPDATE_CREDITS;
2233 * delete a xattr doesn't need metadata and cluster allocation.
2234 * so just calculate the credits and return.
2236 * The credits for removing the value tree will be extended
2237 * by ocfs2_remove_extent itself.
2240 if (!ocfs2_xattr_is_local(xe))
2241 credits += ocfs2_remove_extent_credits(inode->i_sb);
2246 /* do cluster allocation guess first. */
2247 value_size = le64_to_cpu(xe->xe_value_size);
2251 * In xattr set, we always try to set the xe in inode first,
2252 * so if it can be inserted into inode successfully, the old
2253 * one will be removed from the xattr block, and this xattr
2254 * will be inserted into inode as a new xattr in inode.
2256 if (ocfs2_xattr_can_be_in_inode(inode, xi, xis)) {
2257 clusters_add += new_clusters;
2258 credits += ocfs2_remove_extent_credits(inode->i_sb) +
2259 OCFS2_INODE_UPDATE_CREDITS;
2260 if (!ocfs2_xattr_is_local(xe))
2261 credits += ocfs2_calc_extend_credits(
2269 if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
2270 /* the new values will be stored outside. */
2271 u32 old_clusters = 0;
2273 if (!ocfs2_xattr_is_local(xe)) {
2274 old_clusters = ocfs2_clusters_for_bytes(inode->i_sb,
2276 xv = (struct ocfs2_xattr_value_root *)
2277 (base + name_offset + name_len);
2278 value_size = OCFS2_XATTR_ROOT_SIZE;
2282 if (old_clusters >= new_clusters) {
2283 credits += ocfs2_remove_extent_credits(inode->i_sb);
2286 meta_add += ocfs2_extend_meta_needed(&xv->xr_list);
2287 clusters_add += new_clusters - old_clusters;
2288 credits += ocfs2_calc_extend_credits(inode->i_sb,
2292 if (value_size >= OCFS2_XATTR_ROOT_SIZE)
2297 * Now the new value will be stored inside. So if the new
2298 * value is smaller than the size of value root or the old
2299 * value, we don't need any allocation, otherwise we have
2300 * to guess metadata allocation.
2302 if ((ocfs2_xattr_is_local(xe) && value_size >= xi->value_len) ||
2303 (!ocfs2_xattr_is_local(xe) &&
2304 OCFS2_XATTR_ROOT_SIZE >= xi->value_len))
2309 /* calculate metadata allocation. */
2310 if (di->i_xattr_loc) {
2311 if (!xbs->xattr_bh) {
2312 ret = ocfs2_read_xattr_block(inode,
2313 le64_to_cpu(di->i_xattr_loc),
2320 xb = (struct ocfs2_xattr_block *)bh->b_data;
2322 xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data;
2324 if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) {
2325 struct ocfs2_extent_list *el =
2326 &xb->xb_attrs.xb_root.xt_list;
2327 meta_add += ocfs2_extend_meta_needed(el);
2328 credits += ocfs2_calc_extend_credits(inode->i_sb,
2333 * This cluster will be used either for new bucket or for
2335 * If the cluster size is the same as the bucket size, one
2336 * more is needed since we may need to extend the bucket
2340 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
2341 if (OCFS2_XATTR_BUCKET_SIZE ==
2342 OCFS2_SB(inode->i_sb)->s_clustersize) {
2343 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
2348 credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS;
2352 *clusters_need = clusters_add;
2354 *meta_need = meta_add;
2356 *credits_need = credits;
2361 static int ocfs2_init_xattr_set_ctxt(struct inode *inode,
2362 struct ocfs2_dinode *di,
2363 struct ocfs2_xattr_info *xi,
2364 struct ocfs2_xattr_search *xis,
2365 struct ocfs2_xattr_search *xbs,
2366 struct ocfs2_xattr_set_ctxt *ctxt,
2369 int clusters_add, meta_add, ret;
2370 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
2372 memset(ctxt, 0, sizeof(struct ocfs2_xattr_set_ctxt));
2374 ocfs2_init_dealloc_ctxt(&ctxt->dealloc);
2376 ret = ocfs2_calc_xattr_set_need(inode, di, xi, xis, xbs,
2377 &clusters_add, &meta_add, credits);
2383 mlog(0, "Set xattr %s, reserve meta blocks = %d, clusters = %d, "
2384 "credits = %d\n", xi->name, meta_add, clusters_add, *credits);
2387 ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add,
2396 ret = ocfs2_reserve_clusters(osb, clusters_add, &ctxt->data_ac);
2402 if (ctxt->meta_ac) {
2403 ocfs2_free_alloc_context(ctxt->meta_ac);
2404 ctxt->meta_ac = NULL;
2408 * We cannot have an error and a non null ctxt->data_ac.
2415 static int __ocfs2_xattr_set_handle(struct inode *inode,
2416 struct ocfs2_dinode *di,
2417 struct ocfs2_xattr_info *xi,
2418 struct ocfs2_xattr_search *xis,
2419 struct ocfs2_xattr_search *xbs,
2420 struct ocfs2_xattr_set_ctxt *ctxt)
2422 int ret = 0, credits, old_found;
2425 /* Remove existing extended attribute */
2426 if (!xis->not_found)
2427 ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt);
2428 else if (!xbs->not_found)
2429 ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt);
2431 /* We always try to set extended attribute into inode first*/
2432 ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt);
2433 if (!ret && !xbs->not_found) {
2435 * If succeed and that extended attribute existing in
2436 * external block, then we will remove it.
2441 old_found = xis->not_found;
2442 xis->not_found = -ENODATA;
2443 ret = ocfs2_calc_xattr_set_need(inode,
2451 xis->not_found = old_found;
2457 ret = ocfs2_extend_trans(ctxt->handle, credits +
2458 ctxt->handle->h_buffer_credits);
2463 ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt);
2464 } else if (ret == -ENOSPC) {
2465 if (di->i_xattr_loc && !xbs->xattr_bh) {
2466 ret = ocfs2_xattr_block_find(inode,
2472 old_found = xis->not_found;
2473 xis->not_found = -ENODATA;
2474 ret = ocfs2_calc_xattr_set_need(inode,
2482 xis->not_found = old_found;
2488 ret = ocfs2_extend_trans(ctxt->handle, credits +
2489 ctxt->handle->h_buffer_credits);
2496 * If no space in inode, we will set extended attribute
2497 * into external block.
2499 ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt);
2502 if (!xis->not_found) {
2504 * If succeed and that extended attribute
2505 * existing in inode, we will remove it.
2509 xbs->not_found = -ENODATA;
2510 ret = ocfs2_calc_xattr_set_need(inode,
2523 ret = ocfs2_extend_trans(ctxt->handle, credits +
2524 ctxt->handle->h_buffer_credits);
2529 ret = ocfs2_xattr_ibody_set(inode, xi,
2540 * This function only called duing creating inode
2541 * for init security/acl xattrs of the new inode.
2542 * The xattrs could be put into ibody or extent block,
2543 * xattr bucket would not be use in this case.
2544 * transanction credits also be reserved in here.
2546 int ocfs2_xattr_set_handle(handle_t *handle,
2547 struct inode *inode,
2548 struct buffer_head *di_bh,
2554 struct ocfs2_alloc_context *meta_ac,
2555 struct ocfs2_alloc_context *data_ac)
2557 struct ocfs2_dinode *di;
2560 struct ocfs2_xattr_info xi = {
2561 .name_index = name_index,
2564 .value_len = value_len,
2567 struct ocfs2_xattr_search xis = {
2568 .not_found = -ENODATA,
2571 struct ocfs2_xattr_search xbs = {
2572 .not_found = -ENODATA,
2575 struct ocfs2_xattr_set_ctxt ctxt = {
2581 if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb)))
2584 xis.inode_bh = xbs.inode_bh = di_bh;
2585 di = (struct ocfs2_dinode *)di_bh->b_data;
2587 down_write(&OCFS2_I(inode)->ip_xattr_sem);
2589 ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis);
2592 if (xis.not_found) {
2593 ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs);
2598 ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt);
2601 up_write(&OCFS2_I(inode)->ip_xattr_sem);
2602 brelse(xbs.xattr_bh);
2610 * Set, replace or remove an extended attribute for this inode.
2611 * value is NULL to remove an existing extended attribute, else either
2612 * create or replace an extended attribute.
2614 int ocfs2_xattr_set(struct inode *inode,
2621 struct buffer_head *di_bh = NULL;
2622 struct ocfs2_dinode *di;
2624 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
2625 struct inode *tl_inode = osb->osb_tl_inode;
2626 struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, };
2628 struct ocfs2_xattr_info xi = {
2629 .name_index = name_index,
2632 .value_len = value_len,
2635 struct ocfs2_xattr_search xis = {
2636 .not_found = -ENODATA,
2639 struct ocfs2_xattr_search xbs = {
2640 .not_found = -ENODATA,
2643 if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb)))
2647 * Only xbs will be used on indexed trees. xis doesn't need a
2650 xbs.bucket = ocfs2_xattr_bucket_new(inode);
2652 mlog_errno(-ENOMEM);
2656 ret = ocfs2_inode_lock(inode, &di_bh, 1);
2659 goto cleanup_nolock;
2661 xis.inode_bh = xbs.inode_bh = di_bh;
2662 di = (struct ocfs2_dinode *)di_bh->b_data;
2664 down_write(&OCFS2_I(inode)->ip_xattr_sem);
2666 * Scan inode and external block to find the same name
2667 * extended attribute and collect search infomation.
2669 ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis);
2672 if (xis.not_found) {
2673 ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs);
2678 if (xis.not_found && xbs.not_found) {
2680 if (flags & XATTR_REPLACE)
2687 if (flags & XATTR_CREATE)
2692 mutex_lock(&tl_inode->i_mutex);
2694 if (ocfs2_truncate_log_needs_flush(osb)) {
2695 ret = __ocfs2_flush_truncate_log(osb);
2697 mutex_unlock(&tl_inode->i_mutex);
2702 mutex_unlock(&tl_inode->i_mutex);
2704 ret = ocfs2_init_xattr_set_ctxt(inode, di, &xi, &xis,
2705 &xbs, &ctxt, &credits);
2711 ctxt.handle = ocfs2_start_trans(osb, credits);
2712 if (IS_ERR(ctxt.handle)) {
2713 ret = PTR_ERR(ctxt.handle);
2718 ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt);
2720 ocfs2_commit_trans(osb, ctxt.handle);
2723 ocfs2_free_alloc_context(ctxt.data_ac);
2725 ocfs2_free_alloc_context(ctxt.meta_ac);
2726 if (ocfs2_dealloc_has_cluster(&ctxt.dealloc))
2727 ocfs2_schedule_truncate_log_flush(osb, 1);
2728 ocfs2_run_deallocs(osb, &ctxt.dealloc);
2730 up_write(&OCFS2_I(inode)->ip_xattr_sem);
2731 ocfs2_inode_unlock(inode, 1);
2734 brelse(xbs.xattr_bh);
2735 ocfs2_xattr_bucket_free(xbs.bucket);
2741 * Find the xattr extent rec which may contains name_hash.
2742 * e_cpos will be the first name hash of the xattr rec.
2743 * el must be the ocfs2_xattr_header.xb_attrs.xb_root.xt_list.
2745 static int ocfs2_xattr_get_rec(struct inode *inode,
2750 struct ocfs2_extent_list *el)
2753 struct buffer_head *eb_bh = NULL;
2754 struct ocfs2_extent_block *eb;
2755 struct ocfs2_extent_rec *rec = NULL;
2758 if (el->l_tree_depth) {
2759 ret = ocfs2_find_leaf(inode, el, name_hash, &eb_bh);
2765 eb = (struct ocfs2_extent_block *) eb_bh->b_data;
2768 if (el->l_tree_depth) {
2769 ocfs2_error(inode->i_sb,
2770 "Inode %lu has non zero tree depth in "
2771 "xattr tree block %llu\n", inode->i_ino,
2772 (unsigned long long)eb_bh->b_blocknr);
2778 for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) {
2779 rec = &el->l_recs[i];
2781 if (le32_to_cpu(rec->e_cpos) <= name_hash) {
2782 e_blkno = le64_to_cpu(rec->e_blkno);
2788 ocfs2_error(inode->i_sb, "Inode %lu has bad extent "
2789 "record (%u, %u, 0) in xattr", inode->i_ino,
2790 le32_to_cpu(rec->e_cpos),
2791 ocfs2_rec_clusters(el, rec));
2796 *p_blkno = le64_to_cpu(rec->e_blkno);
2797 *num_clusters = le16_to_cpu(rec->e_leaf_clusters);
2799 *e_cpos = le32_to_cpu(rec->e_cpos);
2805 typedef int (xattr_bucket_func)(struct inode *inode,
2806 struct ocfs2_xattr_bucket *bucket,
2809 static int ocfs2_find_xe_in_bucket(struct inode *inode,
2810 struct ocfs2_xattr_bucket *bucket,
2817 int i, ret = 0, cmp = 1, block_off, new_offset;
2818 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
2819 size_t name_len = strlen(name);
2820 struct ocfs2_xattr_entry *xe = NULL;
2824 * We don't use binary search in the bucket because there
2825 * may be multiple entries with the same name hash.
2827 for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
2828 xe = &xh->xh_entries[i];
2830 if (name_hash > le32_to_cpu(xe->xe_name_hash))
2832 else if (name_hash < le32_to_cpu(xe->xe_name_hash))
2835 cmp = name_index - ocfs2_xattr_get_type(xe);
2837 cmp = name_len - xe->xe_name_len;
2841 ret = ocfs2_xattr_bucket_get_name_value(inode,
2852 xe_name = bucket_block(bucket, block_off) + new_offset;
2853 if (!memcmp(name, xe_name, name_len)) {
2865 * Find the specified xattr entry in a series of buckets.
2866 * This series start from p_blkno and last for num_clusters.
2867 * The ocfs2_xattr_header.xh_num_buckets of the first bucket contains
2868 * the num of the valid buckets.
2870 * Return the buffer_head this xattr should reside in. And if the xattr's
2871 * hash is in the gap of 2 buckets, return the lower bucket.
2873 static int ocfs2_xattr_bucket_find(struct inode *inode,
2880 struct ocfs2_xattr_search *xs)
2883 struct ocfs2_xattr_header *xh = NULL;
2884 struct ocfs2_xattr_entry *xe = NULL;
2886 u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
2887 int low_bucket = 0, bucket, high_bucket;
2888 struct ocfs2_xattr_bucket *search;
2890 u64 blkno, lower_blkno = 0;
2892 search = ocfs2_xattr_bucket_new(inode);
2899 ret = ocfs2_read_xattr_bucket(search, p_blkno);
2905 xh = bucket_xh(search);
2906 high_bucket = le16_to_cpu(xh->xh_num_buckets) - 1;
2907 while (low_bucket <= high_bucket) {
2908 ocfs2_xattr_bucket_relse(search);
2910 bucket = (low_bucket + high_bucket) / 2;
2911 blkno = p_blkno + bucket * blk_per_bucket;
2912 ret = ocfs2_read_xattr_bucket(search, blkno);
2918 xh = bucket_xh(search);
2919 xe = &xh->xh_entries[0];
2920 if (name_hash < le32_to_cpu(xe->xe_name_hash)) {
2921 high_bucket = bucket - 1;
2926 * Check whether the hash of the last entry in our
2927 * bucket is larger than the search one. for an empty
2928 * bucket, the last one is also the first one.
2931 xe = &xh->xh_entries[le16_to_cpu(xh->xh_count) - 1];
2933 last_hash = le32_to_cpu(xe->xe_name_hash);
2935 /* record lower_blkno which may be the insert place. */
2936 lower_blkno = blkno;
2938 if (name_hash > le32_to_cpu(xe->xe_name_hash)) {
2939 low_bucket = bucket + 1;
2943 /* the searched xattr should reside in this bucket if exists. */
2944 ret = ocfs2_find_xe_in_bucket(inode, search,
2945 name_index, name, name_hash,
2955 * Record the bucket we have found.
2956 * When the xattr's hash value is in the gap of 2 buckets, we will
2957 * always set it to the previous bucket.
2960 lower_blkno = p_blkno;
2962 /* This should be in cache - we just read it during the search */
2963 ret = ocfs2_read_xattr_bucket(xs->bucket, lower_blkno);
2969 xs->header = bucket_xh(xs->bucket);
2970 xs->base = bucket_block(xs->bucket, 0);
2971 xs->end = xs->base + inode->i_sb->s_blocksize;
2974 xs->here = &xs->header->xh_entries[index];
2975 mlog(0, "find xattr %s in bucket %llu, entry = %u\n", name,
2976 (unsigned long long)bucket_blkno(xs->bucket), index);
2981 ocfs2_xattr_bucket_free(search);
2985 static int ocfs2_xattr_index_block_find(struct inode *inode,
2986 struct buffer_head *root_bh,
2989 struct ocfs2_xattr_search *xs)
2992 struct ocfs2_xattr_block *xb =
2993 (struct ocfs2_xattr_block *)root_bh->b_data;
2994 struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root;
2995 struct ocfs2_extent_list *el = &xb_root->xt_list;
2997 u32 first_hash, num_clusters = 0;
2998 u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name));
3000 if (le16_to_cpu(el->l_next_free_rec) == 0)
3003 mlog(0, "find xattr %s, hash = %u, index = %d in xattr tree\n",
3004 name, name_hash, name_index);
3006 ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &first_hash,
3013 BUG_ON(p_blkno == 0 || num_clusters == 0 || first_hash > name_hash);
3015 mlog(0, "find xattr extent rec %u clusters from %llu, the first hash "
3016 "in the rec is %u\n", num_clusters, (unsigned long long)p_blkno,
3019 ret = ocfs2_xattr_bucket_find(inode, name_index, name, name_hash,
3020 p_blkno, first_hash, num_clusters, xs);
3026 static int ocfs2_iterate_xattr_buckets(struct inode *inode,
3029 xattr_bucket_func *func,
3033 u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb));
3034 u32 num_buckets = clusters * bpc;
3035 struct ocfs2_xattr_bucket *bucket;
3037 bucket = ocfs2_xattr_bucket_new(inode);
3039 mlog_errno(-ENOMEM);
3043 mlog(0, "iterating xattr buckets in %u clusters starting from %llu\n",
3044 clusters, (unsigned long long)blkno);
3046 for (i = 0; i < num_buckets; i++, blkno += bucket->bu_blocks) {
3047 ret = ocfs2_read_xattr_bucket(bucket, blkno);
3054 * The real bucket num in this series of blocks is stored
3055 * in the 1st bucket.
3058 num_buckets = le16_to_cpu(bucket_xh(bucket)->xh_num_buckets);
3060 mlog(0, "iterating xattr bucket %llu, first hash %u\n",
3061 (unsigned long long)blkno,
3062 le32_to_cpu(bucket_xh(bucket)->xh_entries[0].xe_name_hash));
3064 ret = func(inode, bucket, para);
3067 /* Fall through to bucket_relse() */
3070 ocfs2_xattr_bucket_relse(bucket);
3075 ocfs2_xattr_bucket_free(bucket);
3079 struct ocfs2_xattr_tree_list {
3085 static int ocfs2_xattr_bucket_get_name_value(struct inode *inode,
3086 struct ocfs2_xattr_header *xh,
3093 if (index < 0 || index >= le16_to_cpu(xh->xh_count))
3096 name_offset = le16_to_cpu(xh->xh_entries[index].xe_name_offset);
3098 *block_off = name_offset >> inode->i_sb->s_blocksize_bits;
3099 *new_offset = name_offset % inode->i_sb->s_blocksize;
3104 static int ocfs2_list_xattr_bucket(struct inode *inode,
3105 struct ocfs2_xattr_bucket *bucket,
3109 struct ocfs2_xattr_tree_list *xl = (struct ocfs2_xattr_tree_list *)para;
3110 int i, block_off, new_offset;
3111 const char *prefix, *name;
3113 for (i = 0 ; i < le16_to_cpu(bucket_xh(bucket)->xh_count); i++) {
3114 struct ocfs2_xattr_entry *entry = &bucket_xh(bucket)->xh_entries[i];
3115 type = ocfs2_xattr_get_type(entry);
3116 prefix = ocfs2_xattr_prefix(type);
3119 ret = ocfs2_xattr_bucket_get_name_value(inode,
3127 name = (const char *)bucket_block(bucket, block_off) +
3129 ret = ocfs2_xattr_list_entry(xl->buffer,
3133 entry->xe_name_len);
3142 static int ocfs2_xattr_tree_list_index_block(struct inode *inode,
3143 struct ocfs2_xattr_tree_root *xt,
3147 struct ocfs2_extent_list *el = &xt->xt_list;
3149 u32 name_hash = UINT_MAX, e_cpos = 0, num_clusters = 0;
3151 struct ocfs2_xattr_tree_list xl = {
3153 .buffer_size = buffer_size,
3157 if (le16_to_cpu(el->l_next_free_rec) == 0)
3160 while (name_hash > 0) {
3161 ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno,
3162 &e_cpos, &num_clusters, el);
3168 ret = ocfs2_iterate_xattr_buckets(inode, p_blkno, num_clusters,
3169 ocfs2_list_xattr_bucket,
3179 name_hash = e_cpos - 1;
3187 static int cmp_xe(const void *a, const void *b)
3189 const struct ocfs2_xattr_entry *l = a, *r = b;
3190 u32 l_hash = le32_to_cpu(l->xe_name_hash);
3191 u32 r_hash = le32_to_cpu(r->xe_name_hash);
3193 if (l_hash > r_hash)
3195 if (l_hash < r_hash)
3200 static void swap_xe(void *a, void *b, int size)
3202 struct ocfs2_xattr_entry *l = a, *r = b, tmp;
3205 memcpy(l, r, sizeof(struct ocfs2_xattr_entry));
3206 memcpy(r, &tmp, sizeof(struct ocfs2_xattr_entry));
3210 * When the ocfs2_xattr_block is filled up, new bucket will be created
3211 * and all the xattr entries will be moved to the new bucket.
3212 * The header goes at the start of the bucket, and the names+values are
3213 * filled from the end. This is why *target starts as the last buffer.
3214 * Note: we need to sort the entries since they are not saved in order
3215 * in the ocfs2_xattr_block.
3217 static void ocfs2_cp_xattr_block_to_bucket(struct inode *inode,
3218 struct buffer_head *xb_bh,
3219 struct ocfs2_xattr_bucket *bucket)
3221 int i, blocksize = inode->i_sb->s_blocksize;
3222 int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
3223 u16 offset, size, off_change;
3224 struct ocfs2_xattr_entry *xe;
3225 struct ocfs2_xattr_block *xb =
3226 (struct ocfs2_xattr_block *)xb_bh->b_data;
3227 struct ocfs2_xattr_header *xb_xh = &xb->xb_attrs.xb_header;
3228 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
3229 u16 count = le16_to_cpu(xb_xh->xh_count);
3230 char *src = xb_bh->b_data;
3231 char *target = bucket_block(bucket, blks - 1);
3233 mlog(0, "cp xattr from block %llu to bucket %llu\n",
3234 (unsigned long long)xb_bh->b_blocknr,
3235 (unsigned long long)bucket_blkno(bucket));
3237 for (i = 0; i < blks; i++)
3238 memset(bucket_block(bucket, i), 0, blocksize);
3241 * Since the xe_name_offset is based on ocfs2_xattr_header,
3242 * there is a offset change corresponding to the change of
3243 * ocfs2_xattr_header's position.
3245 off_change = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header);
3246 xe = &xb_xh->xh_entries[count - 1];
3247 offset = le16_to_cpu(xe->xe_name_offset) + off_change;
3248 size = blocksize - offset;
3250 /* copy all the names and values. */
3251 memcpy(target + offset, src + offset, size);
3253 /* Init new header now. */
3254 xh->xh_count = xb_xh->xh_count;
3255 xh->xh_num_buckets = cpu_to_le16(1);
3256 xh->xh_name_value_len = cpu_to_le16(size);
3257 xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE - size);
3259 /* copy all the entries. */
3260 target = bucket_block(bucket, 0);
3261 offset = offsetof(struct ocfs2_xattr_header, xh_entries);
3262 size = count * sizeof(struct ocfs2_xattr_entry);
3263 memcpy(target + offset, (char *)xb_xh + offset, size);
3265 /* Change the xe offset for all the xe because of the move. */
3266 off_change = OCFS2_XATTR_BUCKET_SIZE - blocksize +
3267 offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header);
3268 for (i = 0; i < count; i++)
3269 le16_add_cpu(&xh->xh_entries[i].xe_name_offset, off_change);
3271 mlog(0, "copy entry: start = %u, size = %u, offset_change = %u\n",
3272 offset, size, off_change);
3274 sort(target + offset, count, sizeof(struct ocfs2_xattr_entry),
3279 * After we move xattr from block to index btree, we have to
3280 * update ocfs2_xattr_search to the new xe and base.
3282 * When the entry is in xattr block, xattr_bh indicates the storage place.
3283 * While if the entry is in index b-tree, "bucket" indicates the
3284 * real place of the xattr.
3286 static void ocfs2_xattr_update_xattr_search(struct inode *inode,
3287 struct ocfs2_xattr_search *xs,
3288 struct buffer_head *old_bh)
3290 char *buf = old_bh->b_data;
3291 struct ocfs2_xattr_block *old_xb = (struct ocfs2_xattr_block *)buf;
3292 struct ocfs2_xattr_header *old_xh = &old_xb->xb_attrs.xb_header;
3295 xs->header = bucket_xh(xs->bucket);
3296 xs->base = bucket_block(xs->bucket, 0);
3297 xs->end = xs->base + inode->i_sb->s_blocksize;
3302 i = xs->here - old_xh->xh_entries;
3303 xs->here = &xs->header->xh_entries[i];
3306 static int ocfs2_xattr_create_index_block(struct inode *inode,
3307 struct ocfs2_xattr_search *xs,
3308 struct ocfs2_xattr_set_ctxt *ctxt)
3313 handle_t *handle = ctxt->handle;
3314 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
3315 struct ocfs2_inode_info *oi = OCFS2_I(inode);
3316 struct buffer_head *xb_bh = xs->xattr_bh;
3317 struct ocfs2_xattr_block *xb =
3318 (struct ocfs2_xattr_block *)xb_bh->b_data;
3319 struct ocfs2_xattr_tree_root *xr;
3320 u16 xb_flags = le16_to_cpu(xb->xb_flags);
3322 mlog(0, "create xattr index block for %llu\n",
3323 (unsigned long long)xb_bh->b_blocknr);
3325 BUG_ON(xb_flags & OCFS2_XATTR_INDEXED);
3326 BUG_ON(!xs->bucket);
3330 * We can use this lock for now, and maybe move to a dedicated mutex
3331 * if performance becomes a problem later.
3333 down_write(&oi->ip_alloc_sem);
3335 ret = ocfs2_journal_access(handle, inode, xb_bh,
3336 OCFS2_JOURNAL_ACCESS_WRITE);
3342 ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac,
3343 1, 1, &bit_off, &len);
3350 * The bucket may spread in many blocks, and
3351 * we will only touch the 1st block and the last block
3352 * in the whole bucket(one for entry and one for data).
3354 blkno = ocfs2_clusters_to_blocks(inode->i_sb, bit_off);
3356 mlog(0, "allocate 1 cluster from %llu to xattr block\n",
3357 (unsigned long long)blkno);
3359 ret = ocfs2_init_xattr_bucket(xs->bucket, blkno);
3365 ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket,
3366 OCFS2_JOURNAL_ACCESS_CREATE);
3372 ocfs2_cp_xattr_block_to_bucket(inode, xb_bh, xs->bucket);
3373 ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket);
3375 ocfs2_xattr_update_xattr_search(inode, xs, xb_bh);
3377 /* Change from ocfs2_xattr_header to ocfs2_xattr_tree_root */
3378 memset(&xb->xb_attrs, 0, inode->i_sb->s_blocksize -
3379 offsetof(struct ocfs2_xattr_block, xb_attrs));
3381 xr = &xb->xb_attrs.xb_root;
3382 xr->xt_clusters = cpu_to_le32(1);
3383 xr->xt_last_eb_blk = 0;
3384 xr->xt_list.l_tree_depth = 0;
3385 xr->xt_list.l_count = cpu_to_le16(ocfs2_xattr_recs_per_xb(inode->i_sb));
3386 xr->xt_list.l_next_free_rec = cpu_to_le16(1);
3388 xr->xt_list.l_recs[0].e_cpos = 0;
3389 xr->xt_list.l_recs[0].e_blkno = cpu_to_le64(blkno);
3390 xr->xt_list.l_recs[0].e_leaf_clusters = cpu_to_le16(1);
3392 xb->xb_flags = cpu_to_le16(xb_flags | OCFS2_XATTR_INDEXED);
3394 ocfs2_journal_dirty(handle, xb_bh);
3397 up_write(&oi->ip_alloc_sem);
3402 static int cmp_xe_offset(const void *a, const void *b)
3404 const struct ocfs2_xattr_entry *l = a, *r = b;
3405 u32 l_name_offset = le16_to_cpu(l->xe_name_offset);
3406 u32 r_name_offset = le16_to_cpu(r->xe_name_offset);
3408 if (l_name_offset < r_name_offset)
3410 if (l_name_offset > r_name_offset)
3416 * defrag a xattr bucket if we find that the bucket has some
3417 * holes beteen name/value pairs.
3418 * We will move all the name/value pairs to the end of the bucket
3419 * so that we can spare some space for insertion.
3421 static int ocfs2_defrag_xattr_bucket(struct inode *inode,
3423 struct ocfs2_xattr_bucket *bucket)
3426 size_t end, offset, len, value_len;
3427 struct ocfs2_xattr_header *xh;
3428 char *entries, *buf, *bucket_buf = NULL;
3429 u64 blkno = bucket_blkno(bucket);
3431 size_t blocksize = inode->i_sb->s_blocksize;
3432 struct ocfs2_xattr_entry *xe;
3435 * In order to make the operation more efficient and generic,
3436 * we copy all the blocks into a contiguous memory and do the
3437 * defragment there, so if anything is error, we will not touch
3440 bucket_buf = kmalloc(OCFS2_XATTR_BUCKET_SIZE, GFP_NOFS);
3447 for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize)
3448 memcpy(buf, bucket_block(bucket, i), blocksize);
3450 ret = ocfs2_xattr_bucket_journal_access(handle, bucket,
3451 OCFS2_JOURNAL_ACCESS_WRITE);
3457 xh = (struct ocfs2_xattr_header *)bucket_buf;
3458 entries = (char *)xh->xh_entries;
3459 xh_free_start = le16_to_cpu(xh->xh_free_start);
3461 mlog(0, "adjust xattr bucket in %llu, count = %u, "
3462 "xh_free_start = %u, xh_name_value_len = %u.\n",
3463 (unsigned long long)blkno, le16_to_cpu(xh->xh_count),
3464 xh_free_start, le16_to_cpu(xh->xh_name_value_len));
3467 * sort all the entries by their offset.
3468 * the largest will be the first, so that we can
3469 * move them to the end one by one.
3471 sort(entries, le16_to_cpu(xh->xh_count),
3472 sizeof(struct ocfs2_xattr_entry),
3473 cmp_xe_offset, swap_xe);
3475 /* Move all name/values to the end of the bucket. */
3476 xe = xh->xh_entries;
3477 end = OCFS2_XATTR_BUCKET_SIZE;
3478 for (i = 0; i < le16_to_cpu(xh->xh_count); i++, xe++) {
3479 offset = le16_to_cpu(xe->xe_name_offset);
3480 if (ocfs2_xattr_is_local(xe))
3481 value_len = OCFS2_XATTR_SIZE(
3482 le64_to_cpu(xe->xe_value_size));
3484 value_len = OCFS2_XATTR_ROOT_SIZE;
3485 len = OCFS2_XATTR_SIZE(xe->xe_name_len) + value_len;
3488 * We must make sure that the name/value pair
3489 * exist in the same block. So adjust end to
3490 * the previous block end if needed.
3492 if (((end - len) / blocksize !=
3493 (end - 1) / blocksize))
3494 end = end - end % blocksize;
3496 if (end > offset + len) {
3497 memmove(bucket_buf + end - len,
3498 bucket_buf + offset, len);
3499 xe->xe_name_offset = cpu_to_le16(end - len);
3502 mlog_bug_on_msg(end < offset + len, "Defrag check failed for "
3503 "bucket %llu\n", (unsigned long long)blkno);
3508 mlog_bug_on_msg(xh_free_start > end, "Defrag check failed for "
3509 "bucket %llu\n", (unsigned long long)blkno);
3511 if (xh_free_start == end)
3514 memset(bucket_buf + xh_free_start, 0, end - xh_free_start);
3515 xh->xh_free_start = cpu_to_le16(end);
3517 /* sort the entries by their name_hash. */
3518 sort(entries, le16_to_cpu(xh->xh_count),
3519 sizeof(struct ocfs2_xattr_entry),
3523 for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize)
3524 memcpy(bucket_block(bucket, i), buf, blocksize);
3525 ocfs2_xattr_bucket_journal_dirty(handle, bucket);
3533 * prev_blkno points to the start of an existing extent. new_blkno
3534 * points to a newly allocated extent. Because we know each of our
3535 * clusters contains more than bucket, we can easily split one cluster
3536 * at a bucket boundary. So we take the last cluster of the existing
3537 * extent and split it down the middle. We move the last half of the
3538 * buckets in the last cluster of the existing extent over to the new
3541 * first_bh is the buffer at prev_blkno so we can update the existing
3542 * extent's bucket count. header_bh is the bucket were we were hoping
3543 * to insert our xattr. If the bucket move places the target in the new
3544 * extent, we'll update first_bh and header_bh after modifying the old
3547 * first_hash will be set as the 1st xe's name_hash in the new extent.
3549 static int ocfs2_mv_xattr_bucket_cross_cluster(struct inode *inode,
3551 struct ocfs2_xattr_bucket *first,
3552 struct ocfs2_xattr_bucket *target,
3558 struct super_block *sb = inode->i_sb;
3559 int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(sb);
3560 int num_buckets = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(sb));
3561 int to_move = num_buckets / 2;
3563 u64 last_cluster_blkno = bucket_blkno(first) +
3564 ((num_clusters - 1) * ocfs2_clusters_to_blocks(sb, 1));
3566 BUG_ON(le16_to_cpu(bucket_xh(first)->xh_num_buckets) < num_buckets);
3567 BUG_ON(OCFS2_XATTR_BUCKET_SIZE == OCFS2_SB(sb)->s_clustersize);
3569 mlog(0, "move half of xattrs in cluster %llu to %llu\n",
3570 (unsigned long long)last_cluster_blkno, (unsigned long long)new_blkno);
3572 ret = ocfs2_mv_xattr_buckets(inode, handle, bucket_blkno(first),
3573 last_cluster_blkno, new_blkno,
3574 to_move, first_hash);
3580 /* This is the first bucket that got moved */
3581 src_blkno = last_cluster_blkno + (to_move * blks_per_bucket);
3584 * If the target bucket was part of the moved buckets, we need to
3585 * update first and target.
3587 if (bucket_blkno(target) >= src_blkno) {
3588 /* Find the block for the new target bucket */
3589 src_blkno = new_blkno +
3590 (bucket_blkno(target) - src_blkno);
3592 ocfs2_xattr_bucket_relse(first);
3593 ocfs2_xattr_bucket_relse(target);
3596 * These shouldn't fail - the buffers are in the
3597 * journal from ocfs2_cp_xattr_bucket().
3599 ret = ocfs2_read_xattr_bucket(first, new_blkno);
3604 ret = ocfs2_read_xattr_bucket(target, src_blkno);
3615 * Find the suitable pos when we divide a bucket into 2.
3616 * We have to make sure the xattrs with the same hash value exist
3617 * in the same bucket.
3619 * If this ocfs2_xattr_header covers more than one hash value, find a
3620 * place where the hash value changes. Try to find the most even split.
3621 * The most common case is that all entries have different hash values,
3622 * and the first check we make will find a place to split.
3624 static int ocfs2_xattr_find_divide_pos(struct ocfs2_xattr_header *xh)
3626 struct ocfs2_xattr_entry *entries = xh->xh_entries;
3627 int count = le16_to_cpu(xh->xh_count);
3628 int delta, middle = count / 2;
3631 * We start at the middle. Each step gets farther away in both
3632 * directions. We therefore hit the change in hash value
3633 * nearest to the middle. Note that this loop does not execute for
3636 for (delta = 0; delta < middle; delta++) {
3637 /* Let's check delta earlier than middle */
3638 if (cmp_xe(&entries[middle - delta - 1],
3639 &entries[middle - delta]))
3640 return middle - delta;
3642 /* For even counts, don't walk off the end */
3643 if ((middle + delta + 1) == count)
3646 /* Now try delta past middle */
3647 if (cmp_xe(&entries[middle + delta],
3648 &entries[middle + delta + 1]))
3649 return middle + delta + 1;
3652 /* Every entry had the same hash */
3657 * Move some xattrs in old bucket(blk) to new bucket(new_blk).
3658 * first_hash will record the 1st hash of the new bucket.
3660 * Normally half of the xattrs will be moved. But we have to make
3661 * sure that the xattrs with the same hash value are stored in the
3662 * same bucket. If all the xattrs in this bucket have the same hash
3663 * value, the new bucket will be initialized as an empty one and the
3664 * first_hash will be initialized as (hash_value+1).
3666 static int ocfs2_divide_xattr_bucket(struct inode *inode,
3671 int new_bucket_head)
3674 int count, start, len, name_value_len = 0, xe_len, name_offset = 0;
3675 struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL;
3676 struct ocfs2_xattr_header *xh;
3677 struct ocfs2_xattr_entry *xe;
3678 int blocksize = inode->i_sb->s_blocksize;
3680 mlog(0, "move some of xattrs from bucket %llu to %llu\n",
3681 (unsigned long long)blk, (unsigned long long)new_blk);
3683 s_bucket = ocfs2_xattr_bucket_new(inode);
3684 t_bucket = ocfs2_xattr_bucket_new(inode);
3685 if (!s_bucket || !t_bucket) {
3691 ret = ocfs2_read_xattr_bucket(s_bucket, blk);
3697 ret = ocfs2_xattr_bucket_journal_access(handle, s_bucket,
3698 OCFS2_JOURNAL_ACCESS_WRITE);
3705 * Even if !new_bucket_head, we're overwriting t_bucket. Thus,
3706 * there's no need to read it.
3708 ret = ocfs2_init_xattr_bucket(t_bucket, new_blk);
3715 * Hey, if we're overwriting t_bucket, what difference does
3716 * ACCESS_CREATE vs ACCESS_WRITE make? See the comment in the
3717 * same part of ocfs2_cp_xattr_bucket().
3719 ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket,
3721 OCFS2_JOURNAL_ACCESS_CREATE :
3722 OCFS2_JOURNAL_ACCESS_WRITE);
3728 xh = bucket_xh(s_bucket);
3729 count = le16_to_cpu(xh->xh_count);
3730 start = ocfs2_xattr_find_divide_pos(xh);
3732 if (start == count) {
3733 xe = &xh->xh_entries[start-1];
3736 * initialized a new empty bucket here.
3737 * The hash value is set as one larger than
3738 * that of the last entry in the previous bucket.
3740 for (i = 0; i < t_bucket->bu_blocks; i++)
3741 memset(bucket_block(t_bucket, i), 0, blocksize);
3743 xh = bucket_xh(t_bucket);
3744 xh->xh_free_start = cpu_to_le16(blocksize);
3745 xh->xh_entries[0].xe_name_hash = xe->xe_name_hash;
3746 le32_add_cpu(&xh->xh_entries[0].xe_name_hash, 1);
3748 goto set_num_buckets;
3751 /* copy the whole bucket to the new first. */
3752 ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket);
3754 /* update the new bucket. */
3755 xh = bucket_xh(t_bucket);
3758 * Calculate the total name/value len and xh_free_start for
3759 * the old bucket first.
3761 name_offset = OCFS2_XATTR_BUCKET_SIZE;
3763 for (i = 0; i < start; i++) {
3764 xe = &xh->xh_entries[i];
3765 xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
3766 if (ocfs2_xattr_is_local(xe))
3768 OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size));
3770 xe_len += OCFS2_XATTR_ROOT_SIZE;
3771 name_value_len += xe_len;
3772 if (le16_to_cpu(xe->xe_name_offset) < name_offset)
3773 name_offset = le16_to_cpu(xe->xe_name_offset);
3777 * Now begin the modification to the new bucket.
3779 * In the new bucket, We just move the xattr entry to the beginning
3780 * and don't touch the name/value. So there will be some holes in the
3781 * bucket, and they will be removed when ocfs2_defrag_xattr_bucket is
3784 xe = &xh->xh_entries[start];
3785 len = sizeof(struct ocfs2_xattr_entry) * (count - start);
3786 mlog(0, "mv xattr entry len %d from %d to %d\n", len,
3787 (int)((char *)xe - (char *)xh),
3788 (int)((char *)xh->xh_entries - (char *)xh));
3789 memmove((char *)xh->xh_entries, (char *)xe, len);
3790 xe = &xh->xh_entries[count - start];
3791 len = sizeof(struct ocfs2_xattr_entry) * start;
3792 memset((char *)xe, 0, len);
3794 le16_add_cpu(&xh->xh_count, -start);
3795 le16_add_cpu(&xh->xh_name_value_len, -name_value_len);
3797 /* Calculate xh_free_start for the new bucket. */
3798 xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE);
3799 for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
3800 xe = &xh->xh_entries[i];
3801 xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
3802 if (ocfs2_xattr_is_local(xe))
3804 OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size));
3806 xe_len += OCFS2_XATTR_ROOT_SIZE;
3807 if (le16_to_cpu(xe->xe_name_offset) <
3808 le16_to_cpu(xh->xh_free_start))
3809 xh->xh_free_start = xe->xe_name_offset;
3813 /* set xh->xh_num_buckets for the new xh. */
3814 if (new_bucket_head)
3815 xh->xh_num_buckets = cpu_to_le16(1);
3817 xh->xh_num_buckets = 0;
3819 ocfs2_xattr_bucket_journal_dirty(handle, t_bucket);
3821 /* store the first_hash of the new bucket. */
3823 *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash);
3826 * Now only update the 1st block of the old bucket. If we
3827 * just added a new empty bucket, there is no need to modify
3833 xh = bucket_xh(s_bucket);
3834 memset(&xh->xh_entries[start], 0,
3835 sizeof(struct ocfs2_xattr_entry) * (count - start));
3836 xh->xh_count = cpu_to_le16(start);
3837 xh->xh_free_start = cpu_to_le16(name_offset);
3838 xh->xh_name_value_len = cpu_to_le16(name_value_len);
3840 ocfs2_xattr_bucket_journal_dirty(handle, s_bucket);
3843 ocfs2_xattr_bucket_free(s_bucket);
3844 ocfs2_xattr_bucket_free(t_bucket);
3850 * Copy xattr from one bucket to another bucket.
3852 * The caller must make sure that the journal transaction
3853 * has enough space for journaling.
3855 static int ocfs2_cp_xattr_bucket(struct inode *inode,
3862 struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL;
3864 BUG_ON(s_blkno == t_blkno);
3866 mlog(0, "cp bucket %llu to %llu, target is %d\n",
3867 (unsigned long long)s_blkno, (unsigned long long)t_blkno,
3870 s_bucket = ocfs2_xattr_bucket_new(inode);
3871 t_bucket = ocfs2_xattr_bucket_new(inode);
3872 if (!s_bucket || !t_bucket) {
3878 ret = ocfs2_read_xattr_bucket(s_bucket, s_blkno);
3883 * Even if !t_is_new, we're overwriting t_bucket. Thus,
3884 * there's no need to read it.
3886 ret = ocfs2_init_xattr_bucket(t_bucket, t_blkno);
3891 * Hey, if we're overwriting t_bucket, what difference does
3892 * ACCESS_CREATE vs ACCESS_WRITE make? Well, if we allocated a new
3893 * cluster to fill, we came here from
3894 * ocfs2_mv_xattr_buckets(), and it is really new -
3895 * ACCESS_CREATE is required. But we also might have moved data
3896 * out of t_bucket before extending back into it.
3897 * ocfs2_add_new_xattr_bucket() can do this - its call to
3898 * ocfs2_add_new_xattr_cluster() may have created a new extent
3899 * and copied out the end of the old extent. Then it re-extends
3900 * the old extent back to create space for new xattrs. That's
3901 * how we get here, and the bucket isn't really new.
3903 ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket,
3905 OCFS2_JOURNAL_ACCESS_CREATE :
3906 OCFS2_JOURNAL_ACCESS_WRITE);
3910 ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket);
3911 ocfs2_xattr_bucket_journal_dirty(handle, t_bucket);
3914 ocfs2_xattr_bucket_free(t_bucket);
3915 ocfs2_xattr_bucket_free(s_bucket);
3921 * src_blk points to the start of an existing extent. last_blk points to
3922 * last cluster in that extent. to_blk points to a newly allocated
3923 * extent. We copy the buckets from the cluster at last_blk to the new
3924 * extent. If start_bucket is non-zero, we skip that many buckets before
3925 * we start copying. The new extent's xh_num_buckets gets set to the
3926 * number of buckets we copied. The old extent's xh_num_buckets shrinks
3927 * by the same amount.
3929 static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle,
3930 u64 src_blk, u64 last_blk, u64 to_blk,
3931 unsigned int start_bucket,
3934 int i, ret, credits;
3935 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
3936 int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
3937 int num_buckets = ocfs2_xattr_buckets_per_cluster(osb);
3938 struct ocfs2_xattr_bucket *old_first, *new_first;
3940 mlog(0, "mv xattrs from cluster %llu to %llu\n",
3941 (unsigned long long)last_blk, (unsigned long long)to_blk);
3943 BUG_ON(start_bucket >= num_buckets);
3945 num_buckets -= start_bucket;
3946 last_blk += (start_bucket * blks_per_bucket);
3949 /* The first bucket of the original extent */
3950 old_first = ocfs2_xattr_bucket_new(inode);
3951 /* The first bucket of the new extent */
3952 new_first = ocfs2_xattr_bucket_new(inode);
3953 if (!old_first || !new_first) {
3959 ret = ocfs2_read_xattr_bucket(old_first, src_blk);
3966 * We need to update the first bucket of the old extent and all
3967 * the buckets going to the new extent.
3969 credits = ((num_buckets + 1) * blks_per_bucket) +
3970 handle->h_buffer_credits;
3971 ret = ocfs2_extend_trans(handle, credits);
3977 ret = ocfs2_xattr_bucket_journal_access(handle, old_first,
3978 OCFS2_JOURNAL_ACCESS_WRITE);
3984 for (i = 0; i < num_buckets; i++) {
3985 ret = ocfs2_cp_xattr_bucket(inode, handle,
3986 last_blk + (i * blks_per_bucket),
3987 to_blk + (i * blks_per_bucket),
3996 * Get the new bucket ready before we dirty anything
3997 * (This actually shouldn't fail, because we already dirtied
3998 * it once in ocfs2_cp_xattr_bucket()).
4000 ret = ocfs2_read_xattr_bucket(new_first, to_blk);
4005 ret = ocfs2_xattr_bucket_journal_access(handle, new_first,
4006 OCFS2_JOURNAL_ACCESS_WRITE);
4012 /* Now update the headers */
4013 le16_add_cpu(&bucket_xh(old_first)->xh_num_buckets, -num_buckets);
4014 ocfs2_xattr_bucket_journal_dirty(handle, old_first);
4016 bucket_xh(new_first)->xh_num_buckets = cpu_to_le16(num_buckets);
4017 ocfs2_xattr_bucket_journal_dirty(handle, new_first);
4020 *first_hash = le32_to_cpu(bucket_xh(new_first)->xh_entries[0].xe_name_hash);
4023 ocfs2_xattr_bucket_free(new_first);
4024 ocfs2_xattr_bucket_free(old_first);
4029 * Move some xattrs in this cluster to the new cluster.
4030 * This function should only be called when bucket size == cluster size.
4031 * Otherwise ocfs2_mv_xattr_bucket_cross_cluster should be used instead.
4033 static int ocfs2_divide_xattr_cluster(struct inode *inode,
4039 u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
4040 int ret, credits = 2 * blk_per_bucket + handle->h_buffer_credits;
4042 BUG_ON(OCFS2_XATTR_BUCKET_SIZE < OCFS2_SB(inode->i_sb)->s_clustersize);
4044 ret = ocfs2_extend_trans(handle, credits);
4050 /* Move half of the xattr in start_blk to the next bucket. */
4051 return ocfs2_divide_xattr_bucket(inode, handle, prev_blk,
4052 new_blk, first_hash, 1);
4056 * Move some xattrs from the old cluster to the new one since they are not
4057 * contiguous in ocfs2 xattr tree.
4059 * new_blk starts a new separate cluster, and we will move some xattrs from
4060 * prev_blk to it. v_start will be set as the first name hash value in this
4061 * new cluster so that it can be used as e_cpos during tree insertion and
4062 * don't collide with our original b-tree operations. first_bh and header_bh
4063 * will also be updated since they will be used in ocfs2_extend_xattr_bucket
4064 * to extend the insert bucket.
4066 * The problem is how much xattr should we move to the new one and when should
4067 * we update first_bh and header_bh?
4068 * 1. If cluster size > bucket size, that means the previous cluster has more
4069 * than 1 bucket, so just move half nums of bucket into the new cluster and
4070 * update the first_bh and header_bh if the insert bucket has been moved
4071 * to the new cluster.
4072 * 2. If cluster_size == bucket_size:
4073 * a) If the previous extent rec has more than one cluster and the insert
4074 * place isn't in the last cluster, copy the entire last cluster to the
4075 * new one. This time, we don't need to upate the first_bh and header_bh
4076 * since they will not be moved into the new cluster.
4077 * b) Otherwise, move the bottom half of the xattrs in the last cluster into
4078 * the new one. And we set the extend flag to zero if the insert place is
4079 * moved into the new allocated cluster since no extend is needed.
4081 static int ocfs2_adjust_xattr_cross_cluster(struct inode *inode,
4083 struct ocfs2_xattr_bucket *first,
4084 struct ocfs2_xattr_bucket *target,
4092 mlog(0, "adjust xattrs from cluster %llu len %u to %llu\n",
4093 (unsigned long long)bucket_blkno(first), prev_clusters,
4094 (unsigned long long)new_blk);
4096 if (ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)) > 1) {
4097 ret = ocfs2_mv_xattr_bucket_cross_cluster(inode,
4106 /* The start of the last cluster in the first extent */
4107 u64 last_blk = bucket_blkno(first) +
4108 ((prev_clusters - 1) *
4109 ocfs2_clusters_to_blocks(inode->i_sb, 1));
4111 if (prev_clusters > 1 && bucket_blkno(target) != last_blk) {
4112 ret = ocfs2_mv_xattr_buckets(inode, handle,
4113 bucket_blkno(first),
4114 last_blk, new_blk, 0,
4119 ret = ocfs2_divide_xattr_cluster(inode, handle,
4125 if ((bucket_blkno(target) == last_blk) && extend)
4134 * Add a new cluster for xattr storage.
4136 * If the new cluster is contiguous with the previous one, it will be
4137 * appended to the same extent record, and num_clusters will be updated.
4138 * If not, we will insert a new extent for it and move some xattrs in
4139 * the last cluster into the new allocated one.
4140 * We also need to limit the maximum size of a btree leaf, otherwise we'll
4141 * lose the benefits of hashing because we'll have to search large leaves.
4142 * So now the maximum size is OCFS2_MAX_XATTR_TREE_LEAF_SIZE(or clustersize,
4145 * first_bh is the first block of the previous extent rec and header_bh
4146 * indicates the bucket we will insert the new xattrs. They will be updated
4147 * when the header_bh is moved into the new cluster.
4149 static int ocfs2_add_new_xattr_cluster(struct inode *inode,
4150 struct buffer_head *root_bh,
4151 struct buffer_head **first_bh,
4152 struct buffer_head **header_bh,
4157 struct ocfs2_xattr_set_ctxt *ctxt)
4160 u16 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1);
4161 u32 prev_clusters = *num_clusters;
4162 u32 clusters_to_add = 1, bit_off, num_bits, v_start = 0;
4164 handle_t *handle = ctxt->handle;
4165 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
4166 struct ocfs2_extent_tree et;
4167 struct ocfs2_xattr_bucket *first, *target;
4169 mlog(0, "Add new xattr cluster for %llu, previous xattr hash = %u, "
4170 "previous xattr blkno = %llu\n",
4171 (unsigned long long)OCFS2_I(inode)->ip_blkno,
4172 prev_cpos, (unsigned long long)prev_blkno);
4174 ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh);
4176 /* The first bucket of the original extent */
4177 first = ocfs2_xattr_bucket_new(inode);
4178 /* The target bucket for insert */
4179 target = ocfs2_xattr_bucket_new(inode);
4180 if (!first || !target) {
4186 BUG_ON(prev_blkno != (*first_bh)->b_blocknr);
4187 ret = ocfs2_read_xattr_bucket(first, prev_blkno);
4193 ret = ocfs2_read_xattr_bucket(target, (*header_bh)->b_blocknr);
4199 ret = ocfs2_journal_access(handle, inode, root_bh,
4200 OCFS2_JOURNAL_ACCESS_WRITE);
4206 ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac, 1,
4207 clusters_to_add, &bit_off, &num_bits);
4214 BUG_ON(num_bits > clusters_to_add);
4216 block = ocfs2_clusters_to_blocks(osb->sb, bit_off);
4217 mlog(0, "Allocating %u clusters at block %u for xattr in inode %llu\n",
4218 num_bits, bit_off, (unsigned long long)OCFS2_I(inode)->ip_blkno);
4220 if (prev_blkno + prev_clusters * bpc == block &&
4221 (prev_clusters + num_bits) << osb->s_clustersize_bits <=
4222 OCFS2_MAX_XATTR_TREE_LEAF_SIZE) {
4224 * If this cluster is contiguous with the old one and
4225 * adding this new cluster, we don't surpass the limit of
4226 * OCFS2_MAX_XATTR_TREE_LEAF_SIZE, cool. We will let it be
4227 * initialized and used like other buckets in the previous
4229 * So add it as a contiguous one. The caller will handle
4232 v_start = prev_cpos + prev_clusters;
4233 *num_clusters = prev_clusters + num_bits;
4234 mlog(0, "Add contiguous %u clusters to previous extent rec.\n",
4237 ret = ocfs2_adjust_xattr_cross_cluster(inode,
4250 /* Did first+target get moved? */
4251 if (prev_blkno != bucket_blkno(first)) {
4253 *first_bh = first->bu_bhs[0];
4257 *header_bh = target->bu_bhs[0];
4262 mlog(0, "Insert %u clusters at block %llu for xattr at %u\n",
4263 num_bits, (unsigned long long)block, v_start);
4264 ret = ocfs2_insert_extent(osb, handle, inode, &et, v_start, block,
4265 num_bits, 0, ctxt->meta_ac);
4271 ret = ocfs2_journal_dirty(handle, root_bh);
4276 ocfs2_xattr_bucket_free(first);
4277 ocfs2_xattr_bucket_free(target);
4282 * We are given an extent. 'first' is the bucket at the very front of
4283 * the extent. The extent has space for an additional bucket past
4284 * bucket_xh(first)->xh_num_buckets. 'target_blkno' is the block number
4285 * of the target bucket. We wish to shift every bucket past the target
4286 * down one, filling in that additional space. When we get back to the
4287 * target, we split the target between itself and the now-empty bucket
4288 * at target+1 (aka, target_blkno + blks_per_bucket).
4290 static int ocfs2_extend_xattr_bucket(struct inode *inode,
4292 struct ocfs2_xattr_bucket *first,
4297 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
4298 u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
4300 u16 new_bucket = le16_to_cpu(bucket_xh(first)->xh_num_buckets);
4302 mlog(0, "extend xattr bucket in %llu, xattr extend rec starting "
4303 "from %llu, len = %u\n", (unsigned long long)target_blk,
4304 (unsigned long long)bucket_blkno(first), num_clusters);
4306 /* The extent must have room for an additional bucket */
4307 BUG_ON(new_bucket >=
4308 (num_clusters * ocfs2_xattr_buckets_per_cluster(osb)));
4310 /* end_blk points to the last existing bucket */
4311 end_blk = bucket_blkno(first) + ((new_bucket - 1) * blk_per_bucket);
4314 * end_blk is the start of the last existing bucket.
4315 * Thus, (end_blk - target_blk) covers the target bucket and
4316 * every bucket after it up to, but not including, the last
4317 * existing bucket. Then we add the last existing bucket, the
4318 * new bucket, and the first bucket (3 * blk_per_bucket).
4320 credits = (end_blk - target_blk) + (3 * blk_per_bucket) +
4321 handle->h_buffer_credits;
4322 ret = ocfs2_extend_trans(handle, credits);
4328 ret = ocfs2_xattr_bucket_journal_access(handle, first,
4329 OCFS2_JOURNAL_ACCESS_WRITE);
4335 while (end_blk != target_blk) {
4336 ret = ocfs2_cp_xattr_bucket(inode, handle, end_blk,
4337 end_blk + blk_per_bucket, 0);
4340 end_blk -= blk_per_bucket;
4343 /* Move half of the xattr in target_blkno to the next bucket. */
4344 ret = ocfs2_divide_xattr_bucket(inode, handle, target_blk,
4345 target_blk + blk_per_bucket, NULL, 0);
4347 le16_add_cpu(&bucket_xh(first)->xh_num_buckets, 1);
4348 ocfs2_xattr_bucket_journal_dirty(handle, first);
4355 * Add new xattr bucket in an extent record and adjust the buckets accordingly.
4356 * xb_bh is the ocfs2_xattr_block.
4357 * We will move all the buckets starting from header_bh to the next place. As
4358 * for this one, half num of its xattrs will be moved to the next one.
4360 * We will allocate a new cluster if current cluster is full and adjust
4361 * header_bh and first_bh if the insert place is moved to the new cluster.
4363 static int ocfs2_add_new_xattr_bucket(struct inode *inode,
4364 struct buffer_head *xb_bh,
4365 struct buffer_head *header_bh,
4366 struct ocfs2_xattr_set_ctxt *ctxt)
4368 struct ocfs2_xattr_header *first_xh = NULL;
4369 struct buffer_head *first_bh = NULL;
4370 struct ocfs2_xattr_block *xb =
4371 (struct ocfs2_xattr_block *)xb_bh->b_data;
4372 struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root;
4373 struct ocfs2_extent_list *el = &xb_root->xt_list;
4374 struct ocfs2_xattr_header *xh =
4375 (struct ocfs2_xattr_header *)header_bh->b_data;
4376 u32 name_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash);
4377 struct super_block *sb = inode->i_sb;
4378 struct ocfs2_super *osb = OCFS2_SB(sb);
4379 int ret, num_buckets, extend = 1;
4381 u32 e_cpos, num_clusters;
4382 /* The bucket at the front of the extent */
4383 struct ocfs2_xattr_bucket *first;
4385 mlog(0, "Add new xattr bucket starting form %llu\n",
4386 (unsigned long long)header_bh->b_blocknr);
4388 first = ocfs2_xattr_bucket_new(inode);
4396 * Add refrence for header_bh here because it may be
4397 * changed in ocfs2_add_new_xattr_cluster and we need
4398 * to free it in the end.
4402 ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &e_cpos,
4409 ret = ocfs2_read_block(inode, p_blkno, &first_bh, NULL);
4415 num_buckets = ocfs2_xattr_buckets_per_cluster(osb) * num_clusters;
4416 first_xh = (struct ocfs2_xattr_header *)first_bh->b_data;
4418 if (num_buckets == le16_to_cpu(first_xh->xh_num_buckets)) {
4419 ret = ocfs2_add_new_xattr_cluster(inode,
4435 /* These bucket reads should be cached */
4436 ret = ocfs2_read_xattr_bucket(first, first_bh->b_blocknr);
4441 ret = ocfs2_extend_xattr_bucket(inode,
4443 first, header_bh->b_blocknr,
4452 ocfs2_xattr_bucket_free(first);
4456 static inline char *ocfs2_xattr_bucket_get_val(struct inode *inode,
4457 struct ocfs2_xattr_bucket *bucket,
4460 int block_off = offs >> inode->i_sb->s_blocksize_bits;
4462 offs = offs % inode->i_sb->s_blocksize;
4463 return bucket_block(bucket, block_off) + offs;
4467 * Handle the normal xattr set, including replace, delete and new.
4469 * Note: "local" indicates the real data's locality. So we can't
4470 * just its bucket locality by its length.
4472 static void ocfs2_xattr_set_entry_normal(struct inode *inode,
4473 struct ocfs2_xattr_info *xi,
4474 struct ocfs2_xattr_search *xs,
4478 struct ocfs2_xattr_entry *last, *xe;
4479 int name_len = strlen(xi->name);
4480 struct ocfs2_xattr_header *xh = xs->header;
4481 u16 count = le16_to_cpu(xh->xh_count), start;
4482 size_t blocksize = inode->i_sb->s_blocksize;
4484 size_t offs, size, new_size;
4486 last = &xh->xh_entries[count];
4487 if (!xs->not_found) {
4489 offs = le16_to_cpu(xe->xe_name_offset);
4490 if (ocfs2_xattr_is_local(xe))
4491 size = OCFS2_XATTR_SIZE(name_len) +
4492 OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size));
4494 size = OCFS2_XATTR_SIZE(name_len) +
4495 OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE);
4498 * If the new value will be stored outside, xi->value has been
4499 * initalized as an empty ocfs2_xattr_value_root, and the same
4500 * goes with xi->value_len, so we can set new_size safely here.
4501 * See ocfs2_xattr_set_in_bucket.
4503 new_size = OCFS2_XATTR_SIZE(name_len) +
4504 OCFS2_XATTR_SIZE(xi->value_len);
4506 le16_add_cpu(&xh->xh_name_value_len, -size);
4508 if (new_size > size)
4509 goto set_new_name_value;
4511 /* Now replace the old value with new one. */
4513 xe->xe_value_size = cpu_to_le64(xi->value_len);
4515 xe->xe_value_size = 0;
4517 val = ocfs2_xattr_bucket_get_val(inode,
4519 memset(val + OCFS2_XATTR_SIZE(name_len), 0,
4520 size - OCFS2_XATTR_SIZE(name_len));
4521 if (OCFS2_XATTR_SIZE(xi->value_len) > 0)
4522 memcpy(val + OCFS2_XATTR_SIZE(name_len),
4523 xi->value, xi->value_len);
4525 le16_add_cpu(&xh->xh_name_value_len, new_size);
4526 ocfs2_xattr_set_local(xe, local);
4530 * Remove the old entry if there is more than one.
4531 * We don't remove the last entry so that we can
4532 * use it to indicate the hash value of the empty
4536 le16_add_cpu(&xh->xh_count, -1);
4539 (void *)last - (void *)xe);
4541 sizeof(struct ocfs2_xattr_entry));
4544 cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE);
4549 /* find a new entry for insert. */
4550 int low = 0, high = count - 1, tmp;
4551 struct ocfs2_xattr_entry *tmp_xe;
4553 while (low <= high && count) {
4554 tmp = (low + high) / 2;
4555 tmp_xe = &xh->xh_entries[tmp];
4557 if (name_hash > le32_to_cpu(tmp_xe->xe_name_hash))
4559 else if (name_hash <
4560 le32_to_cpu(tmp_xe->xe_name_hash))
4568 xe = &xh->xh_entries[low];
4570 memmove(xe + 1, xe, (void *)last - (void *)xe);
4572 le16_add_cpu(&xh->xh_count, 1);
4573 memset(xe, 0, sizeof(struct ocfs2_xattr_entry));
4574 xe->xe_name_hash = cpu_to_le32(name_hash);
4575 xe->xe_name_len = name_len;
4576 ocfs2_xattr_set_type(xe, xi->name_index);
4580 /* Insert the new name+value. */
4581 size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(xi->value_len);
4584 * We must make sure that the name/value pair
4585 * exists in the same block.
4587 offs = le16_to_cpu(xh->xh_free_start);
4588 start = offs - size;
4590 if (start >> inode->i_sb->s_blocksize_bits !=
4591 (offs - 1) >> inode->i_sb->s_blocksize_bits) {
4592 offs = offs - offs % blocksize;
4593 xh->xh_free_start = cpu_to_le16(offs);
4596 val = ocfs2_xattr_bucket_get_val(inode, xs->bucket, offs - size);
4597 xe->xe_name_offset = cpu_to_le16(offs - size);
4599 memset(val, 0, size);
4600 memcpy(val, xi->name, name_len);
4601 memcpy(val + OCFS2_XATTR_SIZE(name_len), xi->value, xi->value_len);
4603 xe->xe_value_size = cpu_to_le64(xi->value_len);
4604 ocfs2_xattr_set_local(xe, local);
4606 le16_add_cpu(&xh->xh_free_start, -size);
4607 le16_add_cpu(&xh->xh_name_value_len, size);
4613 * Set the xattr entry in the specified bucket.
4614 * The bucket is indicated by xs->bucket and it should have the enough
4615 * space for the xattr insertion.
4617 static int ocfs2_xattr_set_entry_in_bucket(struct inode *inode,
4619 struct ocfs2_xattr_info *xi,
4620 struct ocfs2_xattr_search *xs,
4627 mlog(0, "Set xattr entry len = %lu index = %d in bucket %llu\n",
4628 (unsigned long)xi->value_len, xi->name_index,
4629 (unsigned long long)bucket_blkno(xs->bucket));
4631 if (!xs->bucket->bu_bhs[1]) {
4632 blkno = bucket_blkno(xs->bucket);
4633 ocfs2_xattr_bucket_relse(xs->bucket);
4634 ret = ocfs2_read_xattr_bucket(xs->bucket, blkno);
4641 ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket,
4642 OCFS2_JOURNAL_ACCESS_WRITE);
4648 ocfs2_xattr_set_entry_normal(inode, xi, xs, name_hash, local);
4649 ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket);
4656 * Truncate the specified xe_off entry in xattr bucket.
4657 * bucket is indicated by header_bh and len is the new length.
4658 * Both the ocfs2_xattr_value_root and the entry will be updated here.
4660 * Copy the new updated xe and xe_value_root to new_xe and new_xv if needed.
4662 static int ocfs2_xattr_bucket_value_truncate(struct inode *inode,
4663 struct ocfs2_xattr_bucket *bucket,
4666 struct ocfs2_xattr_set_ctxt *ctxt)
4670 struct buffer_head *value_bh = NULL;
4671 struct ocfs2_xattr_value_root *xv;
4672 struct ocfs2_xattr_entry *xe;
4673 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
4674 size_t blocksize = inode->i_sb->s_blocksize;
4676 xe = &xh->xh_entries[xe_off];
4678 BUG_ON(!xe || ocfs2_xattr_is_local(xe));
4680 offset = le16_to_cpu(xe->xe_name_offset) +
4681 OCFS2_XATTR_SIZE(xe->xe_name_len);
4683 value_blk = offset / blocksize;
4685 /* We don't allow ocfs2_xattr_value to be stored in different block. */
4686 BUG_ON(value_blk != (offset + OCFS2_XATTR_ROOT_SIZE - 1) / blocksize);
4688 value_bh = bucket->bu_bhs[value_blk];
4691 xv = (struct ocfs2_xattr_value_root *)
4692 (value_bh->b_data + offset % blocksize);
4694 ret = ocfs2_xattr_bucket_journal_access(ctxt->handle, bucket,
4695 OCFS2_JOURNAL_ACCESS_WRITE);
4702 * From here on out we have to dirty the bucket. The generic
4703 * value calls only modify one of the bucket's bhs, but we need
4704 * to send the bucket at once. So if they error, they *could* have
4705 * modified something. We have to assume they did, and dirty
4706 * the whole bucket. This leaves us in a consistent state.
4708 mlog(0, "truncate %u in xattr bucket %llu to %d bytes.\n",
4709 xe_off, (unsigned long long)bucket_blkno(bucket), len);
4710 ret = ocfs2_xattr_value_truncate(inode, value_bh, xv, len, ctxt);
4716 xe->xe_value_size = cpu_to_le64(len);
4719 ocfs2_xattr_bucket_journal_dirty(ctxt->handle, bucket);
4725 static int ocfs2_xattr_bucket_value_truncate_xs(struct inode *inode,
4726 struct ocfs2_xattr_search *xs,
4728 struct ocfs2_xattr_set_ctxt *ctxt)
4731 struct ocfs2_xattr_entry *xe = xs->here;
4732 struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *)xs->base;
4734 BUG_ON(!xs->bucket->bu_bhs[0] || !xe || ocfs2_xattr_is_local(xe));
4736 offset = xe - xh->xh_entries;
4737 ret = ocfs2_xattr_bucket_value_truncate(inode, xs->bucket,
4745 static int ocfs2_xattr_bucket_set_value_outside(struct inode *inode,
4747 struct ocfs2_xattr_search *xs,
4752 struct ocfs2_xattr_value_root *xv;
4753 struct ocfs2_xattr_entry *xe = xs->here;
4755 BUG_ON(!xs->base || !xe || ocfs2_xattr_is_local(xe));
4757 offset = le16_to_cpu(xe->xe_name_offset) +
4758 OCFS2_XATTR_SIZE(xe->xe_name_len);
4760 xv = (struct ocfs2_xattr_value_root *)(xs->base + offset);
4762 return __ocfs2_xattr_set_value_outside(inode, handle,
4763 xv, val, value_len);
4766 static int ocfs2_rm_xattr_cluster(struct inode *inode,
4767 struct buffer_head *root_bh,
4773 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
4774 struct inode *tl_inode = osb->osb_tl_inode;
4776 struct ocfs2_xattr_block *xb =
4777 (struct ocfs2_xattr_block *)root_bh->b_data;
4778 struct ocfs2_alloc_context *meta_ac = NULL;
4779 struct ocfs2_cached_dealloc_ctxt dealloc;
4780 struct ocfs2_extent_tree et;
4782 ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh);
4784 ocfs2_init_dealloc_ctxt(&dealloc);
4786 mlog(0, "rm xattr extent rec at %u len = %u, start from %llu\n",
4787 cpos, len, (unsigned long long)blkno);
4789 ocfs2_remove_xattr_clusters_from_cache(inode, blkno, len);
4791 ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac);
4797 mutex_lock(&tl_inode->i_mutex);
4799 if (ocfs2_truncate_log_needs_flush(osb)) {
4800 ret = __ocfs2_flush_truncate_log(osb);
4807 handle = ocfs2_start_trans(osb, ocfs2_remove_extent_credits(osb->sb));
4808 if (IS_ERR(handle)) {
4814 ret = ocfs2_journal_access(handle, inode, root_bh,
4815 OCFS2_JOURNAL_ACCESS_WRITE);
4821 ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, meta_ac,
4828 le32_add_cpu(&xb->xb_attrs.xb_root.xt_clusters, -len);
4830 ret = ocfs2_journal_dirty(handle, root_bh);
4836 ret = ocfs2_truncate_log_append(osb, handle, blkno, len);
4841 ocfs2_commit_trans(osb, handle);
4843 ocfs2_schedule_truncate_log_flush(osb, 1);
4845 mutex_unlock(&tl_inode->i_mutex);
4848 ocfs2_free_alloc_context(meta_ac);
4850 ocfs2_run_deallocs(osb, &dealloc);
4855 static void ocfs2_xattr_bucket_remove_xs(struct inode *inode,
4857 struct ocfs2_xattr_search *xs)
4859 struct ocfs2_xattr_header *xh = bucket_xh(xs->bucket);
4860 struct ocfs2_xattr_entry *last = &xh->xh_entries[
4861 le16_to_cpu(xh->xh_count) - 1];
4864 ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket,
4865 OCFS2_JOURNAL_ACCESS_WRITE);
4871 /* Remove the old entry. */
4872 memmove(xs->here, xs->here + 1,
4873 (void *)last - (void *)xs->here);
4874 memset(last, 0, sizeof(struct ocfs2_xattr_entry));
4875 le16_add_cpu(&xh->xh_count, -1);
4877 ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket);
4881 * Set the xattr name/value in the bucket specified in xs.
4883 * As the new value in xi may be stored in the bucket or in an outside cluster,
4884 * we divide the whole process into 3 steps:
4885 * 1. insert name/value in the bucket(ocfs2_xattr_set_entry_in_bucket)
4886 * 2. truncate of the outside cluster(ocfs2_xattr_bucket_value_truncate_xs)
4887 * 3. Set the value to the outside cluster(ocfs2_xattr_bucket_set_value_outside)
4888 * 4. If the clusters for the new outside value can't be allocated, we need
4889 * to free the xattr we allocated in set.
4891 static int ocfs2_xattr_set_in_bucket(struct inode *inode,
4892 struct ocfs2_xattr_info *xi,
4893 struct ocfs2_xattr_search *xs,
4894 struct ocfs2_xattr_set_ctxt *ctxt)
4898 char *val = (char *)xi->value;
4899 struct ocfs2_xattr_entry *xe = xs->here;
4900 u32 name_hash = ocfs2_xattr_name_hash(inode, xi->name,
4903 if (!xs->not_found && !ocfs2_xattr_is_local(xe)) {
4905 * We need to truncate the xattr storage first.
4907 * If both the old and new value are stored to
4908 * outside block, we only need to truncate
4909 * the storage and then set the value outside.
4911 * If the new value should be stored within block,
4912 * we should free all the outside block first and
4913 * the modification to the xattr block will be done
4914 * by following steps.
4916 if (xi->value_len > OCFS2_XATTR_INLINE_SIZE)
4917 value_len = xi->value_len;
4921 ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs,
4928 goto set_value_outside;
4931 value_len = xi->value_len;
4932 /* So we have to handle the inside block change now. */
4933 if (value_len > OCFS2_XATTR_INLINE_SIZE) {
4935 * If the new value will be stored outside of block,
4936 * initalize a new empty value root and insert it first.
4939 xi->value = &def_xv;
4940 xi->value_len = OCFS2_XATTR_ROOT_SIZE;
4943 ret = ocfs2_xattr_set_entry_in_bucket(inode, ctxt->handle, xi, xs,
4950 if (value_len <= OCFS2_XATTR_INLINE_SIZE)
4953 /* allocate the space now for the outside block storage. */
4954 ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs,
4959 if (xs->not_found) {
4961 * We can't allocate enough clusters for outside
4962 * storage and we have allocated xattr already,
4963 * so need to remove it.
4965 ocfs2_xattr_bucket_remove_xs(inode, ctxt->handle, xs);
4971 ret = ocfs2_xattr_bucket_set_value_outside(inode, ctxt->handle,
4972 xs, val, value_len);
4978 * check whether the xattr bucket is filled up with the same hash value.
4979 * If we want to insert the xattr with the same hash, return -ENOSPC.
4980 * If we want to insert a xattr with different hash value, go ahead
4981 * and ocfs2_divide_xattr_bucket will handle this.
4983 static int ocfs2_check_xattr_bucket_collision(struct inode *inode,
4984 struct ocfs2_xattr_bucket *bucket,
4987 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
4988 u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name));
4990 if (name_hash != le32_to_cpu(xh->xh_entries[0].xe_name_hash))
4993 if (xh->xh_entries[le16_to_cpu(xh->xh_count) - 1].xe_name_hash ==
4994 xh->xh_entries[0].xe_name_hash) {
4995 mlog(ML_ERROR, "Too much hash collision in xattr bucket %llu, "
4997 (unsigned long long)bucket_blkno(bucket),
4998 le32_to_cpu(xh->xh_entries[0].xe_name_hash));
5005 static int ocfs2_xattr_set_entry_index_block(struct inode *inode,
5006 struct ocfs2_xattr_info *xi,
5007 struct ocfs2_xattr_search *xs,
5008 struct ocfs2_xattr_set_ctxt *ctxt)
5010 struct ocfs2_xattr_header *xh;
5011 struct ocfs2_xattr_entry *xe;
5012 u16 count, header_size, xh_free_start;
5013 int free, max_free, need, old;
5014 size_t value_size = 0, name_len = strlen(xi->name);
5015 size_t blocksize = inode->i_sb->s_blocksize;
5016 int ret, allocation = 0;
5018 mlog_entry("Set xattr %s in xattr index block\n", xi->name);
5022 count = le16_to_cpu(xh->xh_count);
5023 xh_free_start = le16_to_cpu(xh->xh_free_start);
5024 header_size = sizeof(struct ocfs2_xattr_header) +
5025 count * sizeof(struct ocfs2_xattr_entry);
5026 max_free = OCFS2_XATTR_BUCKET_SIZE -
5027 le16_to_cpu(xh->xh_name_value_len) - header_size;
5029 mlog_bug_on_msg(header_size > blocksize, "bucket %llu has header size "
5030 "of %u which exceed block size\n",
5031 (unsigned long long)bucket_blkno(xs->bucket),
5034 if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE)
5035 value_size = OCFS2_XATTR_ROOT_SIZE;
5037 value_size = OCFS2_XATTR_SIZE(xi->value_len);
5040 need = sizeof(struct ocfs2_xattr_entry) +
5041 OCFS2_XATTR_SIZE(name_len) + value_size;
5043 need = value_size + OCFS2_XATTR_SIZE(name_len);
5046 * We only replace the old value if the new length is smaller
5047 * than the old one. Otherwise we will allocate new space in the
5048 * bucket to store it.
5051 if (ocfs2_xattr_is_local(xe))
5052 old = OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size));
5054 old = OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE);
5056 if (old >= value_size)
5060 free = xh_free_start - header_size;
5062 * We need to make sure the new name/value pair
5063 * can exist in the same block.
5065 if (xh_free_start % blocksize < need)
5066 free -= xh_free_start % blocksize;
5068 mlog(0, "xs->not_found = %d, in xattr bucket %llu: free = %d, "
5069 "need = %d, max_free = %d, xh_free_start = %u, xh_name_value_len ="
5070 " %u\n", xs->not_found,
5071 (unsigned long long)bucket_blkno(xs->bucket),
5072 free, need, max_free, le16_to_cpu(xh->xh_free_start),
5073 le16_to_cpu(xh->xh_name_value_len));
5077 count == ocfs2_xattr_max_xe_in_bucket(inode->i_sb))) {
5078 if (need <= max_free &&
5079 count < ocfs2_xattr_max_xe_in_bucket(inode->i_sb)) {
5081 * We can create the space by defragment. Since only the
5082 * name/value will be moved, the xe shouldn't be changed
5085 ret = ocfs2_defrag_xattr_bucket(inode, ctxt->handle,
5092 xh_free_start = le16_to_cpu(xh->xh_free_start);
5093 free = xh_free_start - header_size;
5094 if (xh_free_start % blocksize < need)
5095 free -= xh_free_start % blocksize;
5100 mlog(0, "Can't get enough space for xattr insert by "
5101 "defragment. Need %u bytes, but we have %d, so "
5102 "allocate new bucket for it.\n", need, free);
5106 * We have to add new buckets or clusters and one
5107 * allocation should leave us enough space for insert.
5112 * We do not allow for overlapping ranges between buckets. And
5113 * the maximum number of collisions we will allow for then is
5114 * one bucket's worth, so check it here whether we need to
5115 * add a new bucket for the insert.
5117 ret = ocfs2_check_xattr_bucket_collision(inode,
5125 ret = ocfs2_add_new_xattr_bucket(inode,
5127 xs->bucket->bu_bhs[0],
5134 ocfs2_xattr_bucket_relse(xs->bucket);
5136 ret = ocfs2_xattr_index_block_find(inode, xs->xattr_bh,
5139 if (ret && ret != -ENODATA)
5141 xs->not_found = ret;
5147 ret = ocfs2_xattr_set_in_bucket(inode, xi, xs, ctxt);
5153 static int ocfs2_delete_xattr_in_bucket(struct inode *inode,
5154 struct ocfs2_xattr_bucket *bucket,
5158 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
5160 struct ocfs2_xattr_entry *xe;
5161 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5162 struct ocfs2_xattr_set_ctxt ctxt = {NULL, NULL,};
5163 int credits = ocfs2_remove_extent_credits(osb->sb) +
5164 ocfs2_blocks_per_xattr_bucket(inode->i_sb);
5167 ocfs2_init_dealloc_ctxt(&ctxt.dealloc);
5169 for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
5170 xe = &xh->xh_entries[i];
5171 if (ocfs2_xattr_is_local(xe))
5174 ctxt.handle = ocfs2_start_trans(osb, credits);
5175 if (IS_ERR(ctxt.handle)) {
5176 ret = PTR_ERR(ctxt.handle);
5181 ret = ocfs2_xattr_bucket_value_truncate(inode, bucket,
5184 ocfs2_commit_trans(osb, ctxt.handle);
5191 ocfs2_schedule_truncate_log_flush(osb, 1);
5192 ocfs2_run_deallocs(osb, &ctxt.dealloc);
5196 static int ocfs2_delete_xattr_index_block(struct inode *inode,
5197 struct buffer_head *xb_bh)
5199 struct ocfs2_xattr_block *xb =
5200 (struct ocfs2_xattr_block *)xb_bh->b_data;
5201 struct ocfs2_extent_list *el = &xb->xb_attrs.xb_root.xt_list;
5203 u32 name_hash = UINT_MAX, e_cpos, num_clusters;
5206 if (le16_to_cpu(el->l_next_free_rec) == 0)
5209 while (name_hash > 0) {
5210 ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno,
5211 &e_cpos, &num_clusters, el);
5217 ret = ocfs2_iterate_xattr_buckets(inode, p_blkno, num_clusters,
5218 ocfs2_delete_xattr_in_bucket,
5225 ret = ocfs2_rm_xattr_cluster(inode, xb_bh,
5226 p_blkno, e_cpos, num_clusters);
5235 name_hash = e_cpos - 1;
5243 * 'security' attributes support
5245 static size_t ocfs2_xattr_security_list(struct inode *inode, char *list,
5246 size_t list_size, const char *name,
5249 const size_t prefix_len = XATTR_SECURITY_PREFIX_LEN;
5250 const size_t total_len = prefix_len + name_len + 1;
5252 if (list && total_len <= list_size) {
5253 memcpy(list, XATTR_SECURITY_PREFIX, prefix_len);
5254 memcpy(list + prefix_len, name, name_len);
5255 list[prefix_len + name_len] = '\0';
5260 static int ocfs2_xattr_security_get(struct inode *inode, const char *name,
5261 void *buffer, size_t size)
5263 if (strcmp(name, "") == 0)
5265 return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_SECURITY, name,
5269 static int ocfs2_xattr_security_set(struct inode *inode, const char *name,
5270 const void *value, size_t size, int flags)
5272 if (strcmp(name, "") == 0)
5275 return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_SECURITY, name, value,
5279 int ocfs2_init_security_get(struct inode *inode,
5281 struct ocfs2_security_xattr_info *si)
5283 return security_inode_init_security(inode, dir, &si->name, &si->value,
5287 int ocfs2_init_security_set(handle_t *handle,
5288 struct inode *inode,
5289 struct buffer_head *di_bh,
5290 struct ocfs2_security_xattr_info *si,
5291 struct ocfs2_alloc_context *xattr_ac,
5292 struct ocfs2_alloc_context *data_ac)
5294 return ocfs2_xattr_set_handle(handle, inode, di_bh,
5295 OCFS2_XATTR_INDEX_SECURITY,
5296 si->name, si->value, si->value_len, 0,
5300 struct xattr_handler ocfs2_xattr_security_handler = {
5301 .prefix = XATTR_SECURITY_PREFIX,
5302 .list = ocfs2_xattr_security_list,
5303 .get = ocfs2_xattr_security_get,
5304 .set = ocfs2_xattr_security_set,
5308 * 'trusted' attributes support
5310 static size_t ocfs2_xattr_trusted_list(struct inode *inode, char *list,
5311 size_t list_size, const char *name,
5314 const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN;
5315 const size_t total_len = prefix_len + name_len + 1;
5317 if (list && total_len <= list_size) {
5318 memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len);
5319 memcpy(list + prefix_len, name, name_len);
5320 list[prefix_len + name_len] = '\0';
5325 static int ocfs2_xattr_trusted_get(struct inode *inode, const char *name,
5326 void *buffer, size_t size)
5328 if (strcmp(name, "") == 0)
5330 return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_TRUSTED, name,
5334 static int ocfs2_xattr_trusted_set(struct inode *inode, const char *name,
5335 const void *value, size_t size, int flags)
5337 if (strcmp(name, "") == 0)
5340 return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_TRUSTED, name, value,
5344 struct xattr_handler ocfs2_xattr_trusted_handler = {
5345 .prefix = XATTR_TRUSTED_PREFIX,
5346 .list = ocfs2_xattr_trusted_list,
5347 .get = ocfs2_xattr_trusted_get,
5348 .set = ocfs2_xattr_trusted_set,
5352 * 'user' attributes support
5354 static size_t ocfs2_xattr_user_list(struct inode *inode, char *list,
5355 size_t list_size, const char *name,
5358 const size_t prefix_len = XATTR_USER_PREFIX_LEN;
5359 const size_t total_len = prefix_len + name_len + 1;
5360 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5362 if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
5365 if (list && total_len <= list_size) {
5366 memcpy(list, XATTR_USER_PREFIX, prefix_len);
5367 memcpy(list + prefix_len, name, name_len);
5368 list[prefix_len + name_len] = '\0';
5373 static int ocfs2_xattr_user_get(struct inode *inode, const char *name,
5374 void *buffer, size_t size)
5376 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5378 if (strcmp(name, "") == 0)
5380 if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
5382 return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_USER, name,
5386 static int ocfs2_xattr_user_set(struct inode *inode, const char *name,
5387 const void *value, size_t size, int flags)
5389 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5391 if (strcmp(name, "") == 0)
5393 if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
5396 return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_USER, name, value,
5400 struct xattr_handler ocfs2_xattr_user_handler = {
5401 .prefix = XATTR_USER_PREFIX,
5402 .list = ocfs2_xattr_user_list,
5403 .get = ocfs2_xattr_user_get,
5404 .set = ocfs2_xattr_user_set,