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>
45 #include "blockcheck.h"
55 #include "buffer_head_io.h"
60 struct ocfs2_xattr_def_value_root {
61 struct ocfs2_xattr_value_root xv;
62 struct ocfs2_extent_rec er;
65 struct ocfs2_xattr_bucket {
66 /* The inode these xattrs are associated with */
67 struct inode *bu_inode;
69 /* The actual buffers that make up the bucket */
70 struct buffer_head *bu_bhs[OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET];
72 /* How many blocks make up one bucket for this filesystem */
76 struct ocfs2_xattr_set_ctxt {
78 struct ocfs2_alloc_context *meta_ac;
79 struct ocfs2_alloc_context *data_ac;
80 struct ocfs2_cached_dealloc_ctxt dealloc;
83 #define OCFS2_XATTR_ROOT_SIZE (sizeof(struct ocfs2_xattr_def_value_root))
84 #define OCFS2_XATTR_INLINE_SIZE 80
85 #define OCFS2_XATTR_HEADER_GAP 4
86 #define OCFS2_XATTR_FREE_IN_IBODY (OCFS2_MIN_XATTR_INLINE_SIZE \
87 - sizeof(struct ocfs2_xattr_header) \
88 - OCFS2_XATTR_HEADER_GAP)
89 #define OCFS2_XATTR_FREE_IN_BLOCK(ptr) ((ptr)->i_sb->s_blocksize \
90 - sizeof(struct ocfs2_xattr_block) \
91 - sizeof(struct ocfs2_xattr_header) \
92 - OCFS2_XATTR_HEADER_GAP)
94 static struct ocfs2_xattr_def_value_root def_xv = {
95 .xv.xr_list.l_count = cpu_to_le16(1),
98 struct xattr_handler *ocfs2_xattr_handlers[] = {
99 &ocfs2_xattr_user_handler,
100 #ifdef CONFIG_OCFS2_FS_POSIX_ACL
101 &ocfs2_xattr_acl_access_handler,
102 &ocfs2_xattr_acl_default_handler,
104 &ocfs2_xattr_trusted_handler,
105 &ocfs2_xattr_security_handler,
109 static struct xattr_handler *ocfs2_xattr_handler_map[OCFS2_XATTR_MAX] = {
110 [OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler,
111 #ifdef CONFIG_OCFS2_FS_POSIX_ACL
112 [OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS]
113 = &ocfs2_xattr_acl_access_handler,
114 [OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT]
115 = &ocfs2_xattr_acl_default_handler,
117 [OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler,
118 [OCFS2_XATTR_INDEX_SECURITY] = &ocfs2_xattr_security_handler,
121 struct ocfs2_xattr_info {
128 struct ocfs2_xattr_search {
129 struct buffer_head *inode_bh;
131 * xattr_bh point to the block buffer head which has extended attribute
132 * when extended attribute in inode, xattr_bh is equal to inode_bh.
134 struct buffer_head *xattr_bh;
135 struct ocfs2_xattr_header *header;
136 struct ocfs2_xattr_bucket *bucket;
139 struct ocfs2_xattr_entry *here;
143 static int ocfs2_xattr_bucket_get_name_value(struct inode *inode,
144 struct ocfs2_xattr_header *xh,
149 static int ocfs2_xattr_block_find(struct inode *inode,
152 struct ocfs2_xattr_search *xs);
153 static int ocfs2_xattr_index_block_find(struct inode *inode,
154 struct buffer_head *root_bh,
157 struct ocfs2_xattr_search *xs);
159 static int ocfs2_xattr_tree_list_index_block(struct inode *inode,
160 struct ocfs2_xattr_tree_root *xt,
164 static int ocfs2_xattr_create_index_block(struct inode *inode,
165 struct ocfs2_xattr_search *xs,
166 struct ocfs2_xattr_set_ctxt *ctxt);
168 static int ocfs2_xattr_set_entry_index_block(struct inode *inode,
169 struct ocfs2_xattr_info *xi,
170 struct ocfs2_xattr_search *xs,
171 struct ocfs2_xattr_set_ctxt *ctxt);
173 static int ocfs2_delete_xattr_index_block(struct inode *inode,
174 struct buffer_head *xb_bh);
175 static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle,
176 u64 src_blk, u64 last_blk, u64 to_blk,
177 unsigned int start_bucket,
180 static inline u16 ocfs2_xattr_buckets_per_cluster(struct ocfs2_super *osb)
182 return (1 << osb->s_clustersize_bits) / OCFS2_XATTR_BUCKET_SIZE;
185 static inline u16 ocfs2_blocks_per_xattr_bucket(struct super_block *sb)
187 return OCFS2_XATTR_BUCKET_SIZE / (1 << sb->s_blocksize_bits);
190 static inline u16 ocfs2_xattr_max_xe_in_bucket(struct super_block *sb)
192 u16 len = sb->s_blocksize -
193 offsetof(struct ocfs2_xattr_header, xh_entries);
195 return len / sizeof(struct ocfs2_xattr_entry);
198 #define bucket_blkno(_b) ((_b)->bu_bhs[0]->b_blocknr)
199 #define bucket_block(_b, _n) ((_b)->bu_bhs[(_n)]->b_data)
200 #define bucket_xh(_b) ((struct ocfs2_xattr_header *)bucket_block((_b), 0))
202 static struct ocfs2_xattr_bucket *ocfs2_xattr_bucket_new(struct inode *inode)
204 struct ocfs2_xattr_bucket *bucket;
205 int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
207 BUG_ON(blks > OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET);
209 bucket = kzalloc(sizeof(struct ocfs2_xattr_bucket), GFP_NOFS);
211 bucket->bu_inode = inode;
212 bucket->bu_blocks = blks;
218 static void ocfs2_xattr_bucket_relse(struct ocfs2_xattr_bucket *bucket)
222 for (i = 0; i < bucket->bu_blocks; i++) {
223 brelse(bucket->bu_bhs[i]);
224 bucket->bu_bhs[i] = NULL;
228 static void ocfs2_xattr_bucket_free(struct ocfs2_xattr_bucket *bucket)
231 ocfs2_xattr_bucket_relse(bucket);
232 bucket->bu_inode = NULL;
238 * A bucket that has never been written to disk doesn't need to be
239 * read. We just need the buffer_heads. Don't call this for
240 * buckets that are already on disk. ocfs2_read_xattr_bucket() initializes
243 static int ocfs2_init_xattr_bucket(struct ocfs2_xattr_bucket *bucket,
248 for (i = 0; i < bucket->bu_blocks; i++) {
249 bucket->bu_bhs[i] = sb_getblk(bucket->bu_inode->i_sb,
251 if (!bucket->bu_bhs[i]) {
257 if (!ocfs2_buffer_uptodate(INODE_CACHE(bucket->bu_inode),
259 ocfs2_set_new_buffer_uptodate(INODE_CACHE(bucket->bu_inode),
264 ocfs2_xattr_bucket_relse(bucket);
268 /* Read the xattr bucket at xb_blkno */
269 static int ocfs2_read_xattr_bucket(struct ocfs2_xattr_bucket *bucket,
274 rc = ocfs2_read_blocks(INODE_CACHE(bucket->bu_inode), xb_blkno,
275 bucket->bu_blocks, bucket->bu_bhs, 0,
278 spin_lock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock);
279 rc = ocfs2_validate_meta_ecc_bhs(bucket->bu_inode->i_sb,
282 &bucket_xh(bucket)->xh_check);
283 spin_unlock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock);
289 ocfs2_xattr_bucket_relse(bucket);
293 static int ocfs2_xattr_bucket_journal_access(handle_t *handle,
294 struct ocfs2_xattr_bucket *bucket,
299 for (i = 0; i < bucket->bu_blocks; i++) {
300 rc = ocfs2_journal_access(handle,
301 INODE_CACHE(bucket->bu_inode),
302 bucket->bu_bhs[i], type);
312 static void ocfs2_xattr_bucket_journal_dirty(handle_t *handle,
313 struct ocfs2_xattr_bucket *bucket)
317 spin_lock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock);
318 ocfs2_compute_meta_ecc_bhs(bucket->bu_inode->i_sb,
319 bucket->bu_bhs, bucket->bu_blocks,
320 &bucket_xh(bucket)->xh_check);
321 spin_unlock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock);
323 for (i = 0; i < bucket->bu_blocks; i++)
324 ocfs2_journal_dirty(handle, bucket->bu_bhs[i]);
327 static void ocfs2_xattr_bucket_copy_data(struct ocfs2_xattr_bucket *dest,
328 struct ocfs2_xattr_bucket *src)
331 int blocksize = src->bu_inode->i_sb->s_blocksize;
333 BUG_ON(dest->bu_blocks != src->bu_blocks);
334 BUG_ON(dest->bu_inode != src->bu_inode);
336 for (i = 0; i < src->bu_blocks; i++) {
337 memcpy(bucket_block(dest, i), bucket_block(src, i),
342 static int ocfs2_validate_xattr_block(struct super_block *sb,
343 struct buffer_head *bh)
346 struct ocfs2_xattr_block *xb =
347 (struct ocfs2_xattr_block *)bh->b_data;
349 mlog(0, "Validating xattr block %llu\n",
350 (unsigned long long)bh->b_blocknr);
352 BUG_ON(!buffer_uptodate(bh));
355 * If the ecc fails, we return the error but otherwise
356 * leave the filesystem running. We know any error is
357 * local to this block.
359 rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &xb->xb_check);
364 * Errors after here are fatal
367 if (!OCFS2_IS_VALID_XATTR_BLOCK(xb)) {
369 "Extended attribute block #%llu has bad "
371 (unsigned long long)bh->b_blocknr, 7,
376 if (le64_to_cpu(xb->xb_blkno) != bh->b_blocknr) {
378 "Extended attribute block #%llu has an "
379 "invalid xb_blkno of %llu",
380 (unsigned long long)bh->b_blocknr,
381 (unsigned long long)le64_to_cpu(xb->xb_blkno));
385 if (le32_to_cpu(xb->xb_fs_generation) != OCFS2_SB(sb)->fs_generation) {
387 "Extended attribute block #%llu has an invalid "
388 "xb_fs_generation of #%u",
389 (unsigned long long)bh->b_blocknr,
390 le32_to_cpu(xb->xb_fs_generation));
397 static int ocfs2_read_xattr_block(struct inode *inode, u64 xb_blkno,
398 struct buffer_head **bh)
401 struct buffer_head *tmp = *bh;
403 rc = ocfs2_read_block(INODE_CACHE(inode), xb_blkno, &tmp,
404 ocfs2_validate_xattr_block);
406 /* If ocfs2_read_block() got us a new bh, pass it up. */
413 static inline const char *ocfs2_xattr_prefix(int name_index)
415 struct xattr_handler *handler = NULL;
417 if (name_index > 0 && name_index < OCFS2_XATTR_MAX)
418 handler = ocfs2_xattr_handler_map[name_index];
420 return handler ? handler->prefix : NULL;
423 static u32 ocfs2_xattr_name_hash(struct inode *inode,
427 /* Get hash value of uuid from super block */
428 u32 hash = OCFS2_SB(inode->i_sb)->uuid_hash;
431 /* hash extended attribute name */
432 for (i = 0; i < name_len; i++) {
433 hash = (hash << OCFS2_HASH_SHIFT) ^
434 (hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^
442 * ocfs2_xattr_hash_entry()
444 * Compute the hash of an extended attribute.
446 static void ocfs2_xattr_hash_entry(struct inode *inode,
447 struct ocfs2_xattr_header *header,
448 struct ocfs2_xattr_entry *entry)
451 char *name = (char *)header + le16_to_cpu(entry->xe_name_offset);
453 hash = ocfs2_xattr_name_hash(inode, name, entry->xe_name_len);
454 entry->xe_name_hash = cpu_to_le32(hash);
459 static int ocfs2_xattr_entry_real_size(int name_len, size_t value_len)
463 if (value_len <= OCFS2_XATTR_INLINE_SIZE)
464 size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(value_len);
466 size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE;
467 size += sizeof(struct ocfs2_xattr_entry);
472 int ocfs2_calc_security_init(struct inode *dir,
473 struct ocfs2_security_xattr_info *si,
476 struct ocfs2_alloc_context **xattr_ac)
479 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
480 int s_size = ocfs2_xattr_entry_real_size(strlen(si->name),
484 * The max space of security xattr taken inline is
485 * 256(name) + 80(value) + 16(entry) = 352 bytes,
486 * So reserve one metadata block for it is ok.
488 if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE ||
489 s_size > OCFS2_XATTR_FREE_IN_IBODY) {
490 ret = ocfs2_reserve_new_metadata_blocks(osb, 1, xattr_ac);
495 *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS;
498 /* reserve clusters for xattr value which will be set in B tree*/
499 if (si->value_len > OCFS2_XATTR_INLINE_SIZE) {
500 int new_clusters = ocfs2_clusters_for_bytes(dir->i_sb,
503 *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb,
505 *want_clusters += new_clusters;
510 int ocfs2_calc_xattr_init(struct inode *dir,
511 struct buffer_head *dir_bh,
513 struct ocfs2_security_xattr_info *si,
519 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
520 int s_size = 0, a_size = 0, acl_len = 0, new_clusters;
523 s_size = ocfs2_xattr_entry_real_size(strlen(si->name),
526 if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) {
527 acl_len = ocfs2_xattr_get_nolock(dir, dir_bh,
528 OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT,
531 a_size = ocfs2_xattr_entry_real_size(0, acl_len);
534 } else if (acl_len != 0 && acl_len != -ENODATA) {
540 if (!(s_size + a_size))
544 * The max space of security xattr taken inline is
545 * 256(name) + 80(value) + 16(entry) = 352 bytes,
546 * The max space of acl xattr taken inline is
547 * 80(value) + 16(entry) * 2(if directory) = 192 bytes,
548 * when blocksize = 512, may reserve one more cluser for
549 * xattr bucket, otherwise reserve one metadata block
551 * If this is a new directory with inline data,
552 * we choose to reserve the entire inline area for
553 * directory contents and force an external xattr block.
555 if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE ||
556 (S_ISDIR(mode) && ocfs2_supports_inline_data(osb)) ||
557 (s_size + a_size) > OCFS2_XATTR_FREE_IN_IBODY) {
558 *want_meta = *want_meta + 1;
559 *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS;
562 if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE &&
563 (s_size + a_size) > OCFS2_XATTR_FREE_IN_BLOCK(dir)) {
565 *xattr_credits += ocfs2_blocks_per_xattr_bucket(dir->i_sb);
569 * reserve credits and clusters for xattrs which has large value
570 * and have to be set outside
572 if (si->enable && si->value_len > OCFS2_XATTR_INLINE_SIZE) {
573 new_clusters = ocfs2_clusters_for_bytes(dir->i_sb,
575 *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb,
577 *want_clusters += new_clusters;
579 if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL &&
580 acl_len > OCFS2_XATTR_INLINE_SIZE) {
581 /* for directory, it has DEFAULT and ACCESS two types of acls */
582 new_clusters = (S_ISDIR(mode) ? 2 : 1) *
583 ocfs2_clusters_for_bytes(dir->i_sb, acl_len);
584 *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb,
586 *want_clusters += new_clusters;
592 static int ocfs2_xattr_extend_allocation(struct inode *inode,
594 struct ocfs2_xattr_value_buf *vb,
595 struct ocfs2_xattr_set_ctxt *ctxt)
598 handle_t *handle = ctxt->handle;
599 enum ocfs2_alloc_restarted why;
600 u32 prev_clusters, logical_start = le32_to_cpu(vb->vb_xv->xr_clusters);
601 struct ocfs2_extent_tree et;
603 mlog(0, "(clusters_to_add for xattr= %u)\n", clusters_to_add);
605 ocfs2_init_xattr_value_extent_tree(&et, inode, vb);
607 status = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh,
608 OCFS2_JOURNAL_ACCESS_WRITE);
614 prev_clusters = le32_to_cpu(vb->vb_xv->xr_clusters);
615 status = ocfs2_add_clusters_in_btree(handle,
628 status = ocfs2_journal_dirty(handle, vb->vb_bh);
634 clusters_to_add -= le32_to_cpu(vb->vb_xv->xr_clusters) - prev_clusters;
637 * We should have already allocated enough space before the transaction,
638 * so no need to restart.
640 BUG_ON(why != RESTART_NONE || clusters_to_add);
647 static int __ocfs2_remove_xattr_range(struct inode *inode,
648 struct ocfs2_xattr_value_buf *vb,
649 u32 cpos, u32 phys_cpos, u32 len,
650 struct ocfs2_xattr_set_ctxt *ctxt)
653 u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos);
654 handle_t *handle = ctxt->handle;
655 struct ocfs2_extent_tree et;
657 ocfs2_init_xattr_value_extent_tree(&et, inode, vb);
659 ret = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh,
660 OCFS2_JOURNAL_ACCESS_WRITE);
666 ret = ocfs2_remove_extent(handle, &et, cpos, len, ctxt->meta_ac,
673 le32_add_cpu(&vb->vb_xv->xr_clusters, -len);
675 ret = ocfs2_journal_dirty(handle, vb->vb_bh);
681 ret = ocfs2_cache_cluster_dealloc(&ctxt->dealloc, phys_blkno, len);
689 static int ocfs2_xattr_shrink_size(struct inode *inode,
692 struct ocfs2_xattr_value_buf *vb,
693 struct ocfs2_xattr_set_ctxt *ctxt)
696 u32 trunc_len, cpos, phys_cpos, alloc_size;
699 if (old_clusters <= new_clusters)
703 trunc_len = old_clusters - new_clusters;
705 ret = ocfs2_xattr_get_clusters(inode, cpos, &phys_cpos,
707 &vb->vb_xv->xr_list);
713 if (alloc_size > trunc_len)
714 alloc_size = trunc_len;
716 ret = __ocfs2_remove_xattr_range(inode, vb, cpos,
717 phys_cpos, alloc_size,
724 block = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos);
725 ocfs2_remove_xattr_clusters_from_cache(INODE_CACHE(inode),
728 trunc_len -= alloc_size;
735 static int ocfs2_xattr_value_truncate(struct inode *inode,
736 struct ocfs2_xattr_value_buf *vb,
738 struct ocfs2_xattr_set_ctxt *ctxt)
741 u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, len);
742 u32 old_clusters = le32_to_cpu(vb->vb_xv->xr_clusters);
744 if (new_clusters == old_clusters)
747 if (new_clusters > old_clusters)
748 ret = ocfs2_xattr_extend_allocation(inode,
749 new_clusters - old_clusters,
752 ret = ocfs2_xattr_shrink_size(inode,
753 old_clusters, new_clusters,
759 static int ocfs2_xattr_list_entry(char *buffer, size_t size,
760 size_t *result, const char *prefix,
761 const char *name, int name_len)
763 char *p = buffer + *result;
764 int prefix_len = strlen(prefix);
765 int total_len = prefix_len + name_len + 1;
767 *result += total_len;
769 /* we are just looking for how big our buffer needs to be */
776 memcpy(p, prefix, prefix_len);
777 memcpy(p + prefix_len, name, name_len);
778 p[prefix_len + name_len] = '\0';
783 static int ocfs2_xattr_list_entries(struct inode *inode,
784 struct ocfs2_xattr_header *header,
785 char *buffer, size_t buffer_size)
789 const char *prefix, *name;
791 for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) {
792 struct ocfs2_xattr_entry *entry = &header->xh_entries[i];
793 type = ocfs2_xattr_get_type(entry);
794 prefix = ocfs2_xattr_prefix(type);
797 name = (const char *)header +
798 le16_to_cpu(entry->xe_name_offset);
800 ret = ocfs2_xattr_list_entry(buffer, buffer_size,
801 &result, prefix, name,
811 static int ocfs2_xattr_ibody_list(struct inode *inode,
812 struct ocfs2_dinode *di,
816 struct ocfs2_xattr_header *header = NULL;
817 struct ocfs2_inode_info *oi = OCFS2_I(inode);
820 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL))
823 header = (struct ocfs2_xattr_header *)
824 ((void *)di + inode->i_sb->s_blocksize -
825 le16_to_cpu(di->i_xattr_inline_size));
827 ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size);
832 static int ocfs2_xattr_block_list(struct inode *inode,
833 struct ocfs2_dinode *di,
837 struct buffer_head *blk_bh = NULL;
838 struct ocfs2_xattr_block *xb;
841 if (!di->i_xattr_loc)
844 ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc),
851 xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
852 if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) {
853 struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header;
854 ret = ocfs2_xattr_list_entries(inode, header,
855 buffer, buffer_size);
857 struct ocfs2_xattr_tree_root *xt = &xb->xb_attrs.xb_root;
858 ret = ocfs2_xattr_tree_list_index_block(inode, xt,
859 buffer, buffer_size);
867 ssize_t ocfs2_listxattr(struct dentry *dentry,
871 int ret = 0, i_ret = 0, b_ret = 0;
872 struct buffer_head *di_bh = NULL;
873 struct ocfs2_dinode *di = NULL;
874 struct ocfs2_inode_info *oi = OCFS2_I(dentry->d_inode);
876 if (!ocfs2_supports_xattr(OCFS2_SB(dentry->d_sb)))
879 if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL))
882 ret = ocfs2_inode_lock(dentry->d_inode, &di_bh, 0);
888 di = (struct ocfs2_dinode *)di_bh->b_data;
890 down_read(&oi->ip_xattr_sem);
891 i_ret = ocfs2_xattr_ibody_list(dentry->d_inode, di, buffer, size);
899 b_ret = ocfs2_xattr_block_list(dentry->d_inode, di,
904 up_read(&oi->ip_xattr_sem);
905 ocfs2_inode_unlock(dentry->d_inode, 0);
909 return i_ret + b_ret;
912 static int ocfs2_xattr_find_entry(int name_index,
914 struct ocfs2_xattr_search *xs)
916 struct ocfs2_xattr_entry *entry;
923 name_len = strlen(name);
925 for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) {
926 cmp = name_index - ocfs2_xattr_get_type(entry);
928 cmp = name_len - entry->xe_name_len;
930 cmp = memcmp(name, (xs->base +
931 le16_to_cpu(entry->xe_name_offset)),
939 return cmp ? -ENODATA : 0;
942 static int ocfs2_xattr_get_value_outside(struct inode *inode,
943 struct ocfs2_xattr_value_root *xv,
947 u32 cpos, p_cluster, num_clusters, bpc, clusters;
950 size_t cplen, blocksize;
951 struct buffer_head *bh = NULL;
952 struct ocfs2_extent_list *el;
955 clusters = le32_to_cpu(xv->xr_clusters);
956 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1);
957 blocksize = inode->i_sb->s_blocksize;
960 while (cpos < clusters) {
961 ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster,
968 blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster);
969 /* Copy ocfs2_xattr_value */
970 for (i = 0; i < num_clusters * bpc; i++, blkno++) {
971 ret = ocfs2_read_block(INODE_CACHE(inode), blkno,
978 cplen = len >= blocksize ? blocksize : len;
979 memcpy(buffer, bh->b_data, cplen);
988 cpos += num_clusters;
994 static int ocfs2_xattr_ibody_get(struct inode *inode,
999 struct ocfs2_xattr_search *xs)
1001 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1002 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
1003 struct ocfs2_xattr_value_root *xv;
1007 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL))
1010 xs->end = (void *)di + inode->i_sb->s_blocksize;
1011 xs->header = (struct ocfs2_xattr_header *)
1012 (xs->end - le16_to_cpu(di->i_xattr_inline_size));
1013 xs->base = (void *)xs->header;
1014 xs->here = xs->header->xh_entries;
1016 ret = ocfs2_xattr_find_entry(name_index, name, xs);
1019 size = le64_to_cpu(xs->here->xe_value_size);
1021 if (size > buffer_size)
1023 if (ocfs2_xattr_is_local(xs->here)) {
1024 memcpy(buffer, (void *)xs->base +
1025 le16_to_cpu(xs->here->xe_name_offset) +
1026 OCFS2_XATTR_SIZE(xs->here->xe_name_len), size);
1028 xv = (struct ocfs2_xattr_value_root *)
1029 (xs->base + le16_to_cpu(
1030 xs->here->xe_name_offset) +
1031 OCFS2_XATTR_SIZE(xs->here->xe_name_len));
1032 ret = ocfs2_xattr_get_value_outside(inode, xv,
1044 static int ocfs2_xattr_block_get(struct inode *inode,
1049 struct ocfs2_xattr_search *xs)
1051 struct ocfs2_xattr_block *xb;
1052 struct ocfs2_xattr_value_root *xv;
1054 int ret = -ENODATA, name_offset, name_len, i;
1055 int uninitialized_var(block_off);
1057 xs->bucket = ocfs2_xattr_bucket_new(inode);
1064 ret = ocfs2_xattr_block_find(inode, name_index, name, xs);
1070 if (xs->not_found) {
1075 xb = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data;
1076 size = le64_to_cpu(xs->here->xe_value_size);
1079 if (size > buffer_size)
1082 name_offset = le16_to_cpu(xs->here->xe_name_offset);
1083 name_len = OCFS2_XATTR_SIZE(xs->here->xe_name_len);
1084 i = xs->here - xs->header->xh_entries;
1086 if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) {
1087 ret = ocfs2_xattr_bucket_get_name_value(inode,
1088 bucket_xh(xs->bucket),
1092 xs->base = bucket_block(xs->bucket, block_off);
1094 if (ocfs2_xattr_is_local(xs->here)) {
1095 memcpy(buffer, (void *)xs->base +
1096 name_offset + name_len, size);
1098 xv = (struct ocfs2_xattr_value_root *)
1099 (xs->base + name_offset + name_len);
1100 ret = ocfs2_xattr_get_value_outside(inode, xv,
1110 ocfs2_xattr_bucket_free(xs->bucket);
1112 brelse(xs->xattr_bh);
1113 xs->xattr_bh = NULL;
1117 int ocfs2_xattr_get_nolock(struct inode *inode,
1118 struct buffer_head *di_bh,
1125 struct ocfs2_dinode *di = NULL;
1126 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1127 struct ocfs2_xattr_search xis = {
1128 .not_found = -ENODATA,
1130 struct ocfs2_xattr_search xbs = {
1131 .not_found = -ENODATA,
1134 if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb)))
1137 if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL))
1140 xis.inode_bh = xbs.inode_bh = di_bh;
1141 di = (struct ocfs2_dinode *)di_bh->b_data;
1143 down_read(&oi->ip_xattr_sem);
1144 ret = ocfs2_xattr_ibody_get(inode, name_index, name, buffer,
1146 if (ret == -ENODATA && di->i_xattr_loc)
1147 ret = ocfs2_xattr_block_get(inode, name_index, name, buffer,
1149 up_read(&oi->ip_xattr_sem);
1154 /* ocfs2_xattr_get()
1156 * Copy an extended attribute into the buffer provided.
1157 * Buffer is NULL to compute the size of buffer required.
1159 static int ocfs2_xattr_get(struct inode *inode,
1166 struct buffer_head *di_bh = NULL;
1168 ret = ocfs2_inode_lock(inode, &di_bh, 0);
1173 ret = ocfs2_xattr_get_nolock(inode, di_bh, name_index,
1174 name, buffer, buffer_size);
1176 ocfs2_inode_unlock(inode, 0);
1183 static int __ocfs2_xattr_set_value_outside(struct inode *inode,
1185 struct ocfs2_xattr_value_root *xv,
1189 int ret = 0, i, cp_len;
1190 u16 blocksize = inode->i_sb->s_blocksize;
1191 u32 p_cluster, num_clusters;
1192 u32 cpos = 0, bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1);
1193 u32 clusters = ocfs2_clusters_for_bytes(inode->i_sb, value_len);
1195 struct buffer_head *bh = NULL;
1197 BUG_ON(clusters > le32_to_cpu(xv->xr_clusters));
1199 while (cpos < clusters) {
1200 ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster,
1201 &num_clusters, &xv->xr_list);
1207 blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster);
1209 for (i = 0; i < num_clusters * bpc; i++, blkno++) {
1210 ret = ocfs2_read_block(INODE_CACHE(inode), blkno,
1217 ret = ocfs2_journal_access(handle,
1220 OCFS2_JOURNAL_ACCESS_WRITE);
1226 cp_len = value_len > blocksize ? blocksize : value_len;
1227 memcpy(bh->b_data, value, cp_len);
1228 value_len -= cp_len;
1230 if (cp_len < blocksize)
1231 memset(bh->b_data + cp_len, 0,
1232 blocksize - cp_len);
1234 ret = ocfs2_journal_dirty(handle, bh);
1243 * XXX: do we need to empty all the following
1244 * blocks in this cluster?
1249 cpos += num_clusters;
1257 static int ocfs2_xattr_cleanup(struct inode *inode,
1259 struct ocfs2_xattr_info *xi,
1260 struct ocfs2_xattr_search *xs,
1261 struct ocfs2_xattr_value_buf *vb,
1265 size_t name_len = strlen(xi->name);
1266 void *val = xs->base + offs;
1267 size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE;
1269 ret = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh,
1270 OCFS2_JOURNAL_ACCESS_WRITE);
1275 /* Decrease xattr count */
1276 le16_add_cpu(&xs->header->xh_count, -1);
1277 /* Remove the xattr entry and tree root which has already be set*/
1278 memset((void *)xs->here, 0, sizeof(struct ocfs2_xattr_entry));
1279 memset(val, 0, size);
1281 ret = ocfs2_journal_dirty(handle, vb->vb_bh);
1288 static int ocfs2_xattr_update_entry(struct inode *inode,
1290 struct ocfs2_xattr_info *xi,
1291 struct ocfs2_xattr_search *xs,
1292 struct ocfs2_xattr_value_buf *vb,
1297 ret = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh,
1298 OCFS2_JOURNAL_ACCESS_WRITE);
1304 xs->here->xe_name_offset = cpu_to_le16(offs);
1305 xs->here->xe_value_size = cpu_to_le64(xi->value_len);
1306 if (xi->value_len <= OCFS2_XATTR_INLINE_SIZE)
1307 ocfs2_xattr_set_local(xs->here, 1);
1309 ocfs2_xattr_set_local(xs->here, 0);
1310 ocfs2_xattr_hash_entry(inode, xs->header, xs->here);
1312 ret = ocfs2_journal_dirty(handle, vb->vb_bh);
1320 * ocfs2_xattr_set_value_outside()
1322 * Set large size value in B tree.
1324 static int ocfs2_xattr_set_value_outside(struct inode *inode,
1325 struct ocfs2_xattr_info *xi,
1326 struct ocfs2_xattr_search *xs,
1327 struct ocfs2_xattr_set_ctxt *ctxt,
1328 struct ocfs2_xattr_value_buf *vb,
1331 size_t name_len = strlen(xi->name);
1332 void *val = xs->base + offs;
1333 struct ocfs2_xattr_value_root *xv = NULL;
1334 size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE;
1337 memset(val, 0, size);
1338 memcpy(val, xi->name, name_len);
1339 xv = (struct ocfs2_xattr_value_root *)
1340 (val + OCFS2_XATTR_SIZE(name_len));
1341 xv->xr_clusters = 0;
1342 xv->xr_last_eb_blk = 0;
1343 xv->xr_list.l_tree_depth = 0;
1344 xv->xr_list.l_count = cpu_to_le16(1);
1345 xv->xr_list.l_next_free_rec = 0;
1348 ret = ocfs2_xattr_value_truncate(inode, vb, xi->value_len, ctxt);
1353 ret = ocfs2_xattr_update_entry(inode, ctxt->handle, xi, xs, vb, offs);
1358 ret = __ocfs2_xattr_set_value_outside(inode, ctxt->handle, vb->vb_xv,
1359 xi->value, xi->value_len);
1367 * ocfs2_xattr_set_entry_local()
1369 * Set, replace or remove extended attribute in local.
1371 static void ocfs2_xattr_set_entry_local(struct inode *inode,
1372 struct ocfs2_xattr_info *xi,
1373 struct ocfs2_xattr_search *xs,
1374 struct ocfs2_xattr_entry *last,
1377 size_t name_len = strlen(xi->name);
1380 if (xi->value && xs->not_found) {
1381 /* Insert the new xattr entry. */
1382 le16_add_cpu(&xs->header->xh_count, 1);
1383 ocfs2_xattr_set_type(last, xi->name_index);
1384 ocfs2_xattr_set_local(last, 1);
1385 last->xe_name_len = name_len;
1391 first_val = xs->base + min_offs;
1392 offs = le16_to_cpu(xs->here->xe_name_offset);
1393 val = xs->base + offs;
1395 if (le64_to_cpu(xs->here->xe_value_size) >
1396 OCFS2_XATTR_INLINE_SIZE)
1397 size = OCFS2_XATTR_SIZE(name_len) +
1398 OCFS2_XATTR_ROOT_SIZE;
1400 size = OCFS2_XATTR_SIZE(name_len) +
1401 OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size));
1403 if (xi->value && size == OCFS2_XATTR_SIZE(name_len) +
1404 OCFS2_XATTR_SIZE(xi->value_len)) {
1405 /* The old and the new value have the
1406 same size. Just replace the value. */
1407 ocfs2_xattr_set_local(xs->here, 1);
1408 xs->here->xe_value_size = cpu_to_le64(xi->value_len);
1409 /* Clear value bytes. */
1410 memset(val + OCFS2_XATTR_SIZE(name_len),
1412 OCFS2_XATTR_SIZE(xi->value_len));
1413 memcpy(val + OCFS2_XATTR_SIZE(name_len),
1418 /* Remove the old name+value. */
1419 memmove(first_val + size, first_val, val - first_val);
1420 memset(first_val, 0, size);
1421 xs->here->xe_name_hash = 0;
1422 xs->here->xe_name_offset = 0;
1423 ocfs2_xattr_set_local(xs->here, 1);
1424 xs->here->xe_value_size = 0;
1428 /* Adjust all value offsets. */
1429 last = xs->header->xh_entries;
1430 for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) {
1431 size_t o = le16_to_cpu(last->xe_name_offset);
1434 last->xe_name_offset = cpu_to_le16(o + size);
1439 /* Remove the old entry. */
1441 memmove(xs->here, xs->here + 1,
1442 (void *)last - (void *)xs->here);
1443 memset(last, 0, sizeof(struct ocfs2_xattr_entry));
1444 le16_add_cpu(&xs->header->xh_count, -1);
1448 /* Insert the new name+value. */
1449 size_t size = OCFS2_XATTR_SIZE(name_len) +
1450 OCFS2_XATTR_SIZE(xi->value_len);
1451 void *val = xs->base + min_offs - size;
1453 xs->here->xe_name_offset = cpu_to_le16(min_offs - size);
1454 memset(val, 0, size);
1455 memcpy(val, xi->name, name_len);
1456 memcpy(val + OCFS2_XATTR_SIZE(name_len),
1459 xs->here->xe_value_size = cpu_to_le64(xi->value_len);
1460 ocfs2_xattr_set_local(xs->here, 1);
1461 ocfs2_xattr_hash_entry(inode, xs->header, xs->here);
1468 * ocfs2_xattr_set_entry()
1470 * Set extended attribute entry into inode or block.
1472 * If extended attribute value size > OCFS2_XATTR_INLINE_SIZE,
1473 * We first insert tree root(ocfs2_xattr_value_root) with set_entry_local(),
1474 * then set value in B tree with set_value_outside().
1476 static int ocfs2_xattr_set_entry(struct inode *inode,
1477 struct ocfs2_xattr_info *xi,
1478 struct ocfs2_xattr_search *xs,
1479 struct ocfs2_xattr_set_ctxt *ctxt,
1482 struct ocfs2_xattr_entry *last;
1483 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1484 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
1485 size_t min_offs = xs->end - xs->base, name_len = strlen(xi->name);
1487 handle_t *handle = ctxt->handle;
1489 struct ocfs2_xattr_info xi_l = {
1490 .name_index = xi->name_index,
1493 .value_len = xi->value_len,
1495 struct ocfs2_xattr_value_buf vb = {
1496 .vb_bh = xs->xattr_bh,
1497 .vb_access = ocfs2_journal_access_di,
1500 if (!(flag & OCFS2_INLINE_XATTR_FL)) {
1501 BUG_ON(xs->xattr_bh == xs->inode_bh);
1502 vb.vb_access = ocfs2_journal_access_xb;
1504 BUG_ON(xs->xattr_bh != xs->inode_bh);
1506 /* Compute min_offs, last and free space. */
1507 last = xs->header->xh_entries;
1509 for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) {
1510 size_t offs = le16_to_cpu(last->xe_name_offset);
1511 if (offs < min_offs)
1516 free = min_offs - ((void *)last - xs->base) - OCFS2_XATTR_HEADER_GAP;
1520 if (!xs->not_found) {
1522 if (ocfs2_xattr_is_local(xs->here))
1523 size = OCFS2_XATTR_SIZE(name_len) +
1524 OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size));
1526 size = OCFS2_XATTR_SIZE(name_len) +
1527 OCFS2_XATTR_ROOT_SIZE;
1528 free += (size + sizeof(struct ocfs2_xattr_entry));
1530 /* Check free space in inode or block */
1531 if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
1532 if (free < sizeof(struct ocfs2_xattr_entry) +
1533 OCFS2_XATTR_SIZE(name_len) +
1534 OCFS2_XATTR_ROOT_SIZE) {
1538 size_l = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE;
1539 xi_l.value = (void *)&def_xv;
1540 xi_l.value_len = OCFS2_XATTR_ROOT_SIZE;
1541 } else if (xi->value) {
1542 if (free < sizeof(struct ocfs2_xattr_entry) +
1543 OCFS2_XATTR_SIZE(name_len) +
1544 OCFS2_XATTR_SIZE(xi->value_len)) {
1550 if (!xs->not_found) {
1551 /* For existing extended attribute */
1552 size_t size = OCFS2_XATTR_SIZE(name_len) +
1553 OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size));
1554 size_t offs = le16_to_cpu(xs->here->xe_name_offset);
1555 void *val = xs->base + offs;
1557 if (ocfs2_xattr_is_local(xs->here) && size == size_l) {
1558 /* Replace existing local xattr with tree root */
1559 ret = ocfs2_xattr_set_value_outside(inode, xi, xs,
1564 } else if (!ocfs2_xattr_is_local(xs->here)) {
1565 /* For existing xattr which has value outside */
1566 vb.vb_xv = (struct ocfs2_xattr_value_root *)
1567 (val + OCFS2_XATTR_SIZE(name_len));
1569 if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
1571 * If new value need set outside also,
1572 * first truncate old value to new value,
1573 * then set new value with set_value_outside().
1575 ret = ocfs2_xattr_value_truncate(inode,
1584 ret = ocfs2_xattr_update_entry(inode,
1595 ret = __ocfs2_xattr_set_value_outside(inode,
1605 * If new value need set in local,
1606 * just trucate old value to zero.
1608 ret = ocfs2_xattr_value_truncate(inode,
1618 ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), xs->inode_bh,
1619 OCFS2_JOURNAL_ACCESS_WRITE);
1625 if (!(flag & OCFS2_INLINE_XATTR_FL)) {
1626 ret = vb.vb_access(handle, INODE_CACHE(inode), vb.vb_bh,
1627 OCFS2_JOURNAL_ACCESS_WRITE);
1635 * Set value in local, include set tree root in local.
1636 * This is the first step for value size >INLINE_SIZE.
1638 ocfs2_xattr_set_entry_local(inode, &xi_l, xs, last, min_offs);
1640 if (!(flag & OCFS2_INLINE_XATTR_FL)) {
1641 ret = ocfs2_journal_dirty(handle, xs->xattr_bh);
1648 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) &&
1649 (flag & OCFS2_INLINE_XATTR_FL)) {
1650 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1651 unsigned int xattrsize = osb->s_xattr_inline_size;
1654 * Adjust extent record count or inline data size
1655 * to reserve space for extended attribute.
1657 if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
1658 struct ocfs2_inline_data *idata = &di->id2.i_data;
1659 le16_add_cpu(&idata->id_count, -xattrsize);
1660 } else if (!(ocfs2_inode_is_fast_symlink(inode))) {
1661 struct ocfs2_extent_list *el = &di->id2.i_list;
1662 le16_add_cpu(&el->l_count, -(xattrsize /
1663 sizeof(struct ocfs2_extent_rec)));
1665 di->i_xattr_inline_size = cpu_to_le16(xattrsize);
1667 /* Update xattr flag */
1668 spin_lock(&oi->ip_lock);
1669 oi->ip_dyn_features |= flag;
1670 di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features);
1671 spin_unlock(&oi->ip_lock);
1673 ret = ocfs2_journal_dirty(handle, xs->inode_bh);
1677 if (!ret && xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
1679 * Set value outside in B tree.
1680 * This is the second step for value size > INLINE_SIZE.
1682 size_t offs = le16_to_cpu(xs->here->xe_name_offset);
1683 ret = ocfs2_xattr_set_value_outside(inode, xi, xs, ctxt,
1690 * If set value outside failed, we have to clean
1691 * the junk tree root we have already set in local.
1693 ret2 = ocfs2_xattr_cleanup(inode, ctxt->handle,
1703 static int ocfs2_remove_value_outside(struct inode*inode,
1704 struct ocfs2_xattr_value_buf *vb,
1705 struct ocfs2_xattr_header *header)
1708 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1709 struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, };
1711 ocfs2_init_dealloc_ctxt(&ctxt.dealloc);
1713 ctxt.handle = ocfs2_start_trans(osb,
1714 ocfs2_remove_extent_credits(osb->sb));
1715 if (IS_ERR(ctxt.handle)) {
1716 ret = PTR_ERR(ctxt.handle);
1721 for (i = 0; i < le16_to_cpu(header->xh_count); i++) {
1722 struct ocfs2_xattr_entry *entry = &header->xh_entries[i];
1724 if (!ocfs2_xattr_is_local(entry)) {
1727 val = (void *)header +
1728 le16_to_cpu(entry->xe_name_offset);
1729 vb->vb_xv = (struct ocfs2_xattr_value_root *)
1730 (val + OCFS2_XATTR_SIZE(entry->xe_name_len));
1731 ret = ocfs2_xattr_value_truncate(inode, vb, 0, &ctxt);
1739 ocfs2_commit_trans(osb, ctxt.handle);
1740 ocfs2_schedule_truncate_log_flush(osb, 1);
1741 ocfs2_run_deallocs(osb, &ctxt.dealloc);
1746 static int ocfs2_xattr_ibody_remove(struct inode *inode,
1747 struct buffer_head *di_bh)
1750 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
1751 struct ocfs2_xattr_header *header;
1753 struct ocfs2_xattr_value_buf vb = {
1755 .vb_access = ocfs2_journal_access_di,
1758 header = (struct ocfs2_xattr_header *)
1759 ((void *)di + inode->i_sb->s_blocksize -
1760 le16_to_cpu(di->i_xattr_inline_size));
1762 ret = ocfs2_remove_value_outside(inode, &vb, header);
1767 static int ocfs2_xattr_block_remove(struct inode *inode,
1768 struct buffer_head *blk_bh)
1770 struct ocfs2_xattr_block *xb;
1772 struct ocfs2_xattr_value_buf vb = {
1774 .vb_access = ocfs2_journal_access_xb,
1777 xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
1778 if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) {
1779 struct ocfs2_xattr_header *header = &(xb->xb_attrs.xb_header);
1780 ret = ocfs2_remove_value_outside(inode, &vb, header);
1782 ret = ocfs2_delete_xattr_index_block(inode, blk_bh);
1787 static int ocfs2_xattr_free_block(struct inode *inode,
1790 struct inode *xb_alloc_inode;
1791 struct buffer_head *xb_alloc_bh = NULL;
1792 struct buffer_head *blk_bh = NULL;
1793 struct ocfs2_xattr_block *xb;
1794 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1800 ret = ocfs2_read_xattr_block(inode, block, &blk_bh);
1806 ret = ocfs2_xattr_block_remove(inode, blk_bh);
1812 xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
1813 blk = le64_to_cpu(xb->xb_blkno);
1814 bit = le16_to_cpu(xb->xb_suballoc_bit);
1815 bg_blkno = ocfs2_which_suballoc_group(blk, bit);
1817 xb_alloc_inode = ocfs2_get_system_file_inode(osb,
1818 EXTENT_ALLOC_SYSTEM_INODE,
1819 le16_to_cpu(xb->xb_suballoc_slot));
1820 if (!xb_alloc_inode) {
1825 mutex_lock(&xb_alloc_inode->i_mutex);
1827 ret = ocfs2_inode_lock(xb_alloc_inode, &xb_alloc_bh, 1);
1833 handle = ocfs2_start_trans(osb, OCFS2_SUBALLOC_FREE);
1834 if (IS_ERR(handle)) {
1835 ret = PTR_ERR(handle);
1840 ret = ocfs2_free_suballoc_bits(handle, xb_alloc_inode, xb_alloc_bh,
1845 ocfs2_commit_trans(osb, handle);
1847 ocfs2_inode_unlock(xb_alloc_inode, 1);
1848 brelse(xb_alloc_bh);
1850 mutex_unlock(&xb_alloc_inode->i_mutex);
1851 iput(xb_alloc_inode);
1858 * ocfs2_xattr_remove()
1860 * Free extended attribute resources associated with this inode.
1862 int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh)
1864 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1865 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
1869 if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb)))
1872 if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL))
1875 if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) {
1876 ret = ocfs2_xattr_ibody_remove(inode, di_bh);
1883 if (di->i_xattr_loc) {
1884 ret = ocfs2_xattr_free_block(inode,
1885 le64_to_cpu(di->i_xattr_loc));
1892 handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)),
1893 OCFS2_INODE_UPDATE_CREDITS);
1894 if (IS_ERR(handle)) {
1895 ret = PTR_ERR(handle);
1899 ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh,
1900 OCFS2_JOURNAL_ACCESS_WRITE);
1906 di->i_xattr_loc = 0;
1908 spin_lock(&oi->ip_lock);
1909 oi->ip_dyn_features &= ~(OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL);
1910 di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features);
1911 spin_unlock(&oi->ip_lock);
1913 ret = ocfs2_journal_dirty(handle, di_bh);
1917 ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
1922 static int ocfs2_xattr_has_space_inline(struct inode *inode,
1923 struct ocfs2_dinode *di)
1925 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1926 unsigned int xattrsize = OCFS2_SB(inode->i_sb)->s_xattr_inline_size;
1929 if (xattrsize < OCFS2_MIN_XATTR_INLINE_SIZE)
1932 if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
1933 struct ocfs2_inline_data *idata = &di->id2.i_data;
1934 free = le16_to_cpu(idata->id_count) - le64_to_cpu(di->i_size);
1935 } else if (ocfs2_inode_is_fast_symlink(inode)) {
1936 free = ocfs2_fast_symlink_chars(inode->i_sb) -
1937 le64_to_cpu(di->i_size);
1939 struct ocfs2_extent_list *el = &di->id2.i_list;
1940 free = (le16_to_cpu(el->l_count) -
1941 le16_to_cpu(el->l_next_free_rec)) *
1942 sizeof(struct ocfs2_extent_rec);
1944 if (free >= xattrsize)
1951 * ocfs2_xattr_ibody_find()
1953 * Find extended attribute in inode block and
1954 * fill search info into struct ocfs2_xattr_search.
1956 static int ocfs2_xattr_ibody_find(struct inode *inode,
1959 struct ocfs2_xattr_search *xs)
1961 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1962 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
1966 if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE)
1969 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) {
1970 down_read(&oi->ip_alloc_sem);
1971 has_space = ocfs2_xattr_has_space_inline(inode, di);
1972 up_read(&oi->ip_alloc_sem);
1977 xs->xattr_bh = xs->inode_bh;
1978 xs->end = (void *)di + inode->i_sb->s_blocksize;
1979 if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)
1980 xs->header = (struct ocfs2_xattr_header *)
1981 (xs->end - le16_to_cpu(di->i_xattr_inline_size));
1983 xs->header = (struct ocfs2_xattr_header *)
1984 (xs->end - OCFS2_SB(inode->i_sb)->s_xattr_inline_size);
1985 xs->base = (void *)xs->header;
1986 xs->here = xs->header->xh_entries;
1988 /* Find the named attribute. */
1989 if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) {
1990 ret = ocfs2_xattr_find_entry(name_index, name, xs);
1991 if (ret && ret != -ENODATA)
1993 xs->not_found = ret;
2000 * ocfs2_xattr_ibody_set()
2002 * Set, replace or remove an extended attribute into inode block.
2005 static int ocfs2_xattr_ibody_set(struct inode *inode,
2006 struct ocfs2_xattr_info *xi,
2007 struct ocfs2_xattr_search *xs,
2008 struct ocfs2_xattr_set_ctxt *ctxt)
2010 struct ocfs2_inode_info *oi = OCFS2_I(inode);
2011 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
2014 if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE)
2017 down_write(&oi->ip_alloc_sem);
2018 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) {
2019 if (!ocfs2_xattr_has_space_inline(inode, di)) {
2025 ret = ocfs2_xattr_set_entry(inode, xi, xs, ctxt,
2026 (OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL));
2028 up_write(&oi->ip_alloc_sem);
2034 * ocfs2_xattr_block_find()
2036 * Find extended attribute in external block and
2037 * fill search info into struct ocfs2_xattr_search.
2039 static int ocfs2_xattr_block_find(struct inode *inode,
2042 struct ocfs2_xattr_search *xs)
2044 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
2045 struct buffer_head *blk_bh = NULL;
2046 struct ocfs2_xattr_block *xb;
2049 if (!di->i_xattr_loc)
2052 ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc),
2059 xs->xattr_bh = blk_bh;
2060 xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
2062 if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) {
2063 xs->header = &xb->xb_attrs.xb_header;
2064 xs->base = (void *)xs->header;
2065 xs->end = (void *)(blk_bh->b_data) + blk_bh->b_size;
2066 xs->here = xs->header->xh_entries;
2068 ret = ocfs2_xattr_find_entry(name_index, name, xs);
2070 ret = ocfs2_xattr_index_block_find(inode, blk_bh,
2074 if (ret && ret != -ENODATA) {
2075 xs->xattr_bh = NULL;
2078 xs->not_found = ret;
2087 * ocfs2_xattr_block_set()
2089 * Set, replace or remove an extended attribute into external block.
2092 static int ocfs2_xattr_block_set(struct inode *inode,
2093 struct ocfs2_xattr_info *xi,
2094 struct ocfs2_xattr_search *xs,
2095 struct ocfs2_xattr_set_ctxt *ctxt)
2097 struct buffer_head *new_bh = NULL;
2098 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
2099 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
2100 handle_t *handle = ctxt->handle;
2101 struct ocfs2_xattr_block *xblk = NULL;
2102 u16 suballoc_bit_start;
2107 if (!xs->xattr_bh) {
2108 ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2110 OCFS2_JOURNAL_ACCESS_CREATE);
2116 ret = ocfs2_claim_metadata(osb, handle, ctxt->meta_ac, 1,
2117 &suballoc_bit_start, &num_got,
2124 new_bh = sb_getblk(inode->i_sb, first_blkno);
2125 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), new_bh);
2127 ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode),
2129 OCFS2_JOURNAL_ACCESS_CREATE);
2135 /* Initialize ocfs2_xattr_block */
2136 xs->xattr_bh = new_bh;
2137 xblk = (struct ocfs2_xattr_block *)new_bh->b_data;
2138 memset(xblk, 0, inode->i_sb->s_blocksize);
2139 strcpy((void *)xblk, OCFS2_XATTR_BLOCK_SIGNATURE);
2140 xblk->xb_suballoc_slot = cpu_to_le16(osb->slot_num);
2141 xblk->xb_suballoc_bit = cpu_to_le16(suballoc_bit_start);
2142 xblk->xb_fs_generation = cpu_to_le32(osb->fs_generation);
2143 xblk->xb_blkno = cpu_to_le64(first_blkno);
2145 xs->header = &xblk->xb_attrs.xb_header;
2146 xs->base = (void *)xs->header;
2147 xs->end = (void *)xblk + inode->i_sb->s_blocksize;
2148 xs->here = xs->header->xh_entries;
2150 ret = ocfs2_journal_dirty(handle, new_bh);
2155 di->i_xattr_loc = cpu_to_le64(first_blkno);
2156 ocfs2_journal_dirty(handle, xs->inode_bh);
2158 xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data;
2160 if (!(le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED)) {
2161 /* Set extended attribute into external block */
2162 ret = ocfs2_xattr_set_entry(inode, xi, xs, ctxt,
2163 OCFS2_HAS_XATTR_FL);
2164 if (!ret || ret != -ENOSPC)
2167 ret = ocfs2_xattr_create_index_block(inode, xs, ctxt);
2172 ret = ocfs2_xattr_set_entry_index_block(inode, xi, xs, ctxt);
2179 /* Check whether the new xattr can be inserted into the inode. */
2180 static int ocfs2_xattr_can_be_in_inode(struct inode *inode,
2181 struct ocfs2_xattr_info *xi,
2182 struct ocfs2_xattr_search *xs)
2185 struct ocfs2_xattr_entry *last;
2187 size_t min_offs = xs->end - xs->base;
2192 last = xs->header->xh_entries;
2194 for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) {
2195 size_t offs = le16_to_cpu(last->xe_name_offset);
2196 if (offs < min_offs)
2201 free = min_offs - ((void *)last - xs->base) - OCFS2_XATTR_HEADER_GAP;
2205 BUG_ON(!xs->not_found);
2207 if (xi->value_len > OCFS2_XATTR_INLINE_SIZE)
2208 value_size = OCFS2_XATTR_ROOT_SIZE;
2210 value_size = OCFS2_XATTR_SIZE(xi->value_len);
2212 if (free >= sizeof(struct ocfs2_xattr_entry) +
2213 OCFS2_XATTR_SIZE(strlen(xi->name)) + value_size)
2219 static int ocfs2_calc_xattr_set_need(struct inode *inode,
2220 struct ocfs2_dinode *di,
2221 struct ocfs2_xattr_info *xi,
2222 struct ocfs2_xattr_search *xis,
2223 struct ocfs2_xattr_search *xbs,
2228 int ret = 0, old_in_xb = 0;
2229 int clusters_add = 0, meta_add = 0, credits = 0;
2230 struct buffer_head *bh = NULL;
2231 struct ocfs2_xattr_block *xb = NULL;
2232 struct ocfs2_xattr_entry *xe = NULL;
2233 struct ocfs2_xattr_value_root *xv = NULL;
2235 int name_offset, name_len = 0;
2236 u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb,
2241 * Calculate the clusters we need to write.
2242 * No matter whether we replace an old one or add a new one,
2243 * we need this for writing.
2245 if (xi->value_len > OCFS2_XATTR_INLINE_SIZE)
2246 credits += new_clusters *
2247 ocfs2_clusters_to_blocks(inode->i_sb, 1);
2249 if (xis->not_found && xbs->not_found) {
2250 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
2252 if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
2253 clusters_add += new_clusters;
2254 credits += ocfs2_calc_extend_credits(inode->i_sb,
2262 if (!xis->not_found) {
2264 name_offset = le16_to_cpu(xe->xe_name_offset);
2265 name_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
2267 credits += OCFS2_INODE_UPDATE_CREDITS;
2269 int i, block_off = 0;
2270 xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data;
2272 name_offset = le16_to_cpu(xe->xe_name_offset);
2273 name_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
2274 i = xbs->here - xbs->header->xh_entries;
2277 if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) {
2278 ret = ocfs2_xattr_bucket_get_name_value(inode,
2279 bucket_xh(xbs->bucket),
2282 base = bucket_block(xbs->bucket, block_off);
2283 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
2286 credits += OCFS2_XATTR_BLOCK_UPDATE_CREDITS;
2291 * delete a xattr doesn't need metadata and cluster allocation.
2292 * so just calculate the credits and return.
2294 * The credits for removing the value tree will be extended
2295 * by ocfs2_remove_extent itself.
2298 if (!ocfs2_xattr_is_local(xe))
2299 credits += ocfs2_remove_extent_credits(inode->i_sb);
2304 /* do cluster allocation guess first. */
2305 value_size = le64_to_cpu(xe->xe_value_size);
2309 * In xattr set, we always try to set the xe in inode first,
2310 * so if it can be inserted into inode successfully, the old
2311 * one will be removed from the xattr block, and this xattr
2312 * will be inserted into inode as a new xattr in inode.
2314 if (ocfs2_xattr_can_be_in_inode(inode, xi, xis)) {
2315 clusters_add += new_clusters;
2316 credits += ocfs2_remove_extent_credits(inode->i_sb) +
2317 OCFS2_INODE_UPDATE_CREDITS;
2318 if (!ocfs2_xattr_is_local(xe))
2319 credits += ocfs2_calc_extend_credits(
2327 if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
2328 /* the new values will be stored outside. */
2329 u32 old_clusters = 0;
2331 if (!ocfs2_xattr_is_local(xe)) {
2332 old_clusters = ocfs2_clusters_for_bytes(inode->i_sb,
2334 xv = (struct ocfs2_xattr_value_root *)
2335 (base + name_offset + name_len);
2336 value_size = OCFS2_XATTR_ROOT_SIZE;
2340 if (old_clusters >= new_clusters) {
2341 credits += ocfs2_remove_extent_credits(inode->i_sb);
2344 meta_add += ocfs2_extend_meta_needed(&xv->xr_list);
2345 clusters_add += new_clusters - old_clusters;
2346 credits += ocfs2_calc_extend_credits(inode->i_sb,
2350 if (value_size >= OCFS2_XATTR_ROOT_SIZE)
2355 * Now the new value will be stored inside. So if the new
2356 * value is smaller than the size of value root or the old
2357 * value, we don't need any allocation, otherwise we have
2358 * to guess metadata allocation.
2360 if ((ocfs2_xattr_is_local(xe) && value_size >= xi->value_len) ||
2361 (!ocfs2_xattr_is_local(xe) &&
2362 OCFS2_XATTR_ROOT_SIZE >= xi->value_len))
2367 /* calculate metadata allocation. */
2368 if (di->i_xattr_loc) {
2369 if (!xbs->xattr_bh) {
2370 ret = ocfs2_read_xattr_block(inode,
2371 le64_to_cpu(di->i_xattr_loc),
2378 xb = (struct ocfs2_xattr_block *)bh->b_data;
2380 xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data;
2383 * If there is already an xattr tree, good, we can calculate
2384 * like other b-trees. Otherwise we may have the chance of
2385 * create a tree, the credit calculation is borrowed from
2386 * ocfs2_calc_extend_credits with root_el = NULL. And the
2387 * new tree will be cluster based, so no meta is needed.
2389 if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) {
2390 struct ocfs2_extent_list *el =
2391 &xb->xb_attrs.xb_root.xt_list;
2392 meta_add += ocfs2_extend_meta_needed(el);
2393 credits += ocfs2_calc_extend_credits(inode->i_sb,
2396 credits += OCFS2_SUBALLOC_ALLOC + 1;
2399 * This cluster will be used either for new bucket or for
2401 * If the cluster size is the same as the bucket size, one
2402 * more is needed since we may need to extend the bucket
2406 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
2407 if (OCFS2_XATTR_BUCKET_SIZE ==
2408 OCFS2_SB(inode->i_sb)->s_clustersize) {
2409 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
2414 credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS;
2418 *clusters_need = clusters_add;
2420 *meta_need = meta_add;
2422 *credits_need = credits;
2427 static int ocfs2_init_xattr_set_ctxt(struct inode *inode,
2428 struct ocfs2_dinode *di,
2429 struct ocfs2_xattr_info *xi,
2430 struct ocfs2_xattr_search *xis,
2431 struct ocfs2_xattr_search *xbs,
2432 struct ocfs2_xattr_set_ctxt *ctxt,
2435 int clusters_add, meta_add, ret;
2436 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
2438 memset(ctxt, 0, sizeof(struct ocfs2_xattr_set_ctxt));
2440 ocfs2_init_dealloc_ctxt(&ctxt->dealloc);
2442 ret = ocfs2_calc_xattr_set_need(inode, di, xi, xis, xbs,
2443 &clusters_add, &meta_add, credits);
2449 mlog(0, "Set xattr %s, reserve meta blocks = %d, clusters = %d, "
2450 "credits = %d\n", xi->name, meta_add, clusters_add, *credits);
2453 ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add,
2462 ret = ocfs2_reserve_clusters(osb, clusters_add, &ctxt->data_ac);
2468 if (ctxt->meta_ac) {
2469 ocfs2_free_alloc_context(ctxt->meta_ac);
2470 ctxt->meta_ac = NULL;
2474 * We cannot have an error and a non null ctxt->data_ac.
2481 static int __ocfs2_xattr_set_handle(struct inode *inode,
2482 struct ocfs2_dinode *di,
2483 struct ocfs2_xattr_info *xi,
2484 struct ocfs2_xattr_search *xis,
2485 struct ocfs2_xattr_search *xbs,
2486 struct ocfs2_xattr_set_ctxt *ctxt)
2488 int ret = 0, credits, old_found;
2491 /* Remove existing extended attribute */
2492 if (!xis->not_found)
2493 ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt);
2494 else if (!xbs->not_found)
2495 ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt);
2497 /* We always try to set extended attribute into inode first*/
2498 ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt);
2499 if (!ret && !xbs->not_found) {
2501 * If succeed and that extended attribute existing in
2502 * external block, then we will remove it.
2507 old_found = xis->not_found;
2508 xis->not_found = -ENODATA;
2509 ret = ocfs2_calc_xattr_set_need(inode,
2517 xis->not_found = old_found;
2523 ret = ocfs2_extend_trans(ctxt->handle, credits +
2524 ctxt->handle->h_buffer_credits);
2529 ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt);
2530 } else if (ret == -ENOSPC) {
2531 if (di->i_xattr_loc && !xbs->xattr_bh) {
2532 ret = ocfs2_xattr_block_find(inode,
2538 old_found = xis->not_found;
2539 xis->not_found = -ENODATA;
2540 ret = ocfs2_calc_xattr_set_need(inode,
2548 xis->not_found = old_found;
2554 ret = ocfs2_extend_trans(ctxt->handle, credits +
2555 ctxt->handle->h_buffer_credits);
2562 * If no space in inode, we will set extended attribute
2563 * into external block.
2565 ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt);
2568 if (!xis->not_found) {
2570 * If succeed and that extended attribute
2571 * existing in inode, we will remove it.
2575 xbs->not_found = -ENODATA;
2576 ret = ocfs2_calc_xattr_set_need(inode,
2589 ret = ocfs2_extend_trans(ctxt->handle, credits +
2590 ctxt->handle->h_buffer_credits);
2595 ret = ocfs2_xattr_ibody_set(inode, xi,
2602 /* Update inode ctime. */
2603 ret = ocfs2_journal_access_di(ctxt->handle, INODE_CACHE(inode),
2605 OCFS2_JOURNAL_ACCESS_WRITE);
2611 inode->i_ctime = CURRENT_TIME;
2612 di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
2613 di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
2614 ocfs2_journal_dirty(ctxt->handle, xis->inode_bh);
2621 * This function only called duing creating inode
2622 * for init security/acl xattrs of the new inode.
2623 * All transanction credits have been reserved in mknod.
2625 int ocfs2_xattr_set_handle(handle_t *handle,
2626 struct inode *inode,
2627 struct buffer_head *di_bh,
2633 struct ocfs2_alloc_context *meta_ac,
2634 struct ocfs2_alloc_context *data_ac)
2636 struct ocfs2_dinode *di;
2639 struct ocfs2_xattr_info xi = {
2640 .name_index = name_index,
2643 .value_len = value_len,
2646 struct ocfs2_xattr_search xis = {
2647 .not_found = -ENODATA,
2650 struct ocfs2_xattr_search xbs = {
2651 .not_found = -ENODATA,
2654 struct ocfs2_xattr_set_ctxt ctxt = {
2660 if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb)))
2664 * In extreme situation, may need xattr bucket when
2665 * block size is too small. And we have already reserved
2666 * the credits for bucket in mknod.
2668 if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) {
2669 xbs.bucket = ocfs2_xattr_bucket_new(inode);
2671 mlog_errno(-ENOMEM);
2676 xis.inode_bh = xbs.inode_bh = di_bh;
2677 di = (struct ocfs2_dinode *)di_bh->b_data;
2679 down_write(&OCFS2_I(inode)->ip_xattr_sem);
2681 ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis);
2684 if (xis.not_found) {
2685 ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs);
2690 ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt);
2693 up_write(&OCFS2_I(inode)->ip_xattr_sem);
2694 brelse(xbs.xattr_bh);
2695 ocfs2_xattr_bucket_free(xbs.bucket);
2703 * Set, replace or remove an extended attribute for this inode.
2704 * value is NULL to remove an existing extended attribute, else either
2705 * create or replace an extended attribute.
2707 int ocfs2_xattr_set(struct inode *inode,
2714 struct buffer_head *di_bh = NULL;
2715 struct ocfs2_dinode *di;
2717 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
2718 struct inode *tl_inode = osb->osb_tl_inode;
2719 struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, };
2721 struct ocfs2_xattr_info xi = {
2722 .name_index = name_index,
2725 .value_len = value_len,
2728 struct ocfs2_xattr_search xis = {
2729 .not_found = -ENODATA,
2732 struct ocfs2_xattr_search xbs = {
2733 .not_found = -ENODATA,
2736 if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb)))
2740 * Only xbs will be used on indexed trees. xis doesn't need a
2743 xbs.bucket = ocfs2_xattr_bucket_new(inode);
2745 mlog_errno(-ENOMEM);
2749 ret = ocfs2_inode_lock(inode, &di_bh, 1);
2752 goto cleanup_nolock;
2754 xis.inode_bh = xbs.inode_bh = di_bh;
2755 di = (struct ocfs2_dinode *)di_bh->b_data;
2757 down_write(&OCFS2_I(inode)->ip_xattr_sem);
2759 * Scan inode and external block to find the same name
2760 * extended attribute and collect search infomation.
2762 ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis);
2765 if (xis.not_found) {
2766 ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs);
2771 if (xis.not_found && xbs.not_found) {
2773 if (flags & XATTR_REPLACE)
2780 if (flags & XATTR_CREATE)
2785 mutex_lock(&tl_inode->i_mutex);
2787 if (ocfs2_truncate_log_needs_flush(osb)) {
2788 ret = __ocfs2_flush_truncate_log(osb);
2790 mutex_unlock(&tl_inode->i_mutex);
2795 mutex_unlock(&tl_inode->i_mutex);
2797 ret = ocfs2_init_xattr_set_ctxt(inode, di, &xi, &xis,
2798 &xbs, &ctxt, &credits);
2804 /* we need to update inode's ctime field, so add credit for it. */
2805 credits += OCFS2_INODE_UPDATE_CREDITS;
2806 ctxt.handle = ocfs2_start_trans(osb, credits);
2807 if (IS_ERR(ctxt.handle)) {
2808 ret = PTR_ERR(ctxt.handle);
2813 ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt);
2815 ocfs2_commit_trans(osb, ctxt.handle);
2818 ocfs2_free_alloc_context(ctxt.data_ac);
2820 ocfs2_free_alloc_context(ctxt.meta_ac);
2821 if (ocfs2_dealloc_has_cluster(&ctxt.dealloc))
2822 ocfs2_schedule_truncate_log_flush(osb, 1);
2823 ocfs2_run_deallocs(osb, &ctxt.dealloc);
2825 up_write(&OCFS2_I(inode)->ip_xattr_sem);
2826 ocfs2_inode_unlock(inode, 1);
2829 brelse(xbs.xattr_bh);
2830 ocfs2_xattr_bucket_free(xbs.bucket);
2836 * Find the xattr extent rec which may contains name_hash.
2837 * e_cpos will be the first name hash of the xattr rec.
2838 * el must be the ocfs2_xattr_header.xb_attrs.xb_root.xt_list.
2840 static int ocfs2_xattr_get_rec(struct inode *inode,
2845 struct ocfs2_extent_list *el)
2848 struct buffer_head *eb_bh = NULL;
2849 struct ocfs2_extent_block *eb;
2850 struct ocfs2_extent_rec *rec = NULL;
2853 if (el->l_tree_depth) {
2854 ret = ocfs2_find_leaf(INODE_CACHE(inode), el, name_hash,
2861 eb = (struct ocfs2_extent_block *) eb_bh->b_data;
2864 if (el->l_tree_depth) {
2865 ocfs2_error(inode->i_sb,
2866 "Inode %lu has non zero tree depth in "
2867 "xattr tree block %llu\n", inode->i_ino,
2868 (unsigned long long)eb_bh->b_blocknr);
2874 for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) {
2875 rec = &el->l_recs[i];
2877 if (le32_to_cpu(rec->e_cpos) <= name_hash) {
2878 e_blkno = le64_to_cpu(rec->e_blkno);
2884 ocfs2_error(inode->i_sb, "Inode %lu has bad extent "
2885 "record (%u, %u, 0) in xattr", inode->i_ino,
2886 le32_to_cpu(rec->e_cpos),
2887 ocfs2_rec_clusters(el, rec));
2892 *p_blkno = le64_to_cpu(rec->e_blkno);
2893 *num_clusters = le16_to_cpu(rec->e_leaf_clusters);
2895 *e_cpos = le32_to_cpu(rec->e_cpos);
2901 typedef int (xattr_bucket_func)(struct inode *inode,
2902 struct ocfs2_xattr_bucket *bucket,
2905 static int ocfs2_find_xe_in_bucket(struct inode *inode,
2906 struct ocfs2_xattr_bucket *bucket,
2913 int i, ret = 0, cmp = 1, block_off, new_offset;
2914 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
2915 size_t name_len = strlen(name);
2916 struct ocfs2_xattr_entry *xe = NULL;
2920 * We don't use binary search in the bucket because there
2921 * may be multiple entries with the same name hash.
2923 for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
2924 xe = &xh->xh_entries[i];
2926 if (name_hash > le32_to_cpu(xe->xe_name_hash))
2928 else if (name_hash < le32_to_cpu(xe->xe_name_hash))
2931 cmp = name_index - ocfs2_xattr_get_type(xe);
2933 cmp = name_len - xe->xe_name_len;
2937 ret = ocfs2_xattr_bucket_get_name_value(inode,
2948 xe_name = bucket_block(bucket, block_off) + new_offset;
2949 if (!memcmp(name, xe_name, name_len)) {
2961 * Find the specified xattr entry in a series of buckets.
2962 * This series start from p_blkno and last for num_clusters.
2963 * The ocfs2_xattr_header.xh_num_buckets of the first bucket contains
2964 * the num of the valid buckets.
2966 * Return the buffer_head this xattr should reside in. And if the xattr's
2967 * hash is in the gap of 2 buckets, return the lower bucket.
2969 static int ocfs2_xattr_bucket_find(struct inode *inode,
2976 struct ocfs2_xattr_search *xs)
2979 struct ocfs2_xattr_header *xh = NULL;
2980 struct ocfs2_xattr_entry *xe = NULL;
2982 u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
2983 int low_bucket = 0, bucket, high_bucket;
2984 struct ocfs2_xattr_bucket *search;
2986 u64 blkno, lower_blkno = 0;
2988 search = ocfs2_xattr_bucket_new(inode);
2995 ret = ocfs2_read_xattr_bucket(search, p_blkno);
3001 xh = bucket_xh(search);
3002 high_bucket = le16_to_cpu(xh->xh_num_buckets) - 1;
3003 while (low_bucket <= high_bucket) {
3004 ocfs2_xattr_bucket_relse(search);
3006 bucket = (low_bucket + high_bucket) / 2;
3007 blkno = p_blkno + bucket * blk_per_bucket;
3008 ret = ocfs2_read_xattr_bucket(search, blkno);
3014 xh = bucket_xh(search);
3015 xe = &xh->xh_entries[0];
3016 if (name_hash < le32_to_cpu(xe->xe_name_hash)) {
3017 high_bucket = bucket - 1;
3022 * Check whether the hash of the last entry in our
3023 * bucket is larger than the search one. for an empty
3024 * bucket, the last one is also the first one.
3027 xe = &xh->xh_entries[le16_to_cpu(xh->xh_count) - 1];
3029 last_hash = le32_to_cpu(xe->xe_name_hash);
3031 /* record lower_blkno which may be the insert place. */
3032 lower_blkno = blkno;
3034 if (name_hash > le32_to_cpu(xe->xe_name_hash)) {
3035 low_bucket = bucket + 1;
3039 /* the searched xattr should reside in this bucket if exists. */
3040 ret = ocfs2_find_xe_in_bucket(inode, search,
3041 name_index, name, name_hash,
3051 * Record the bucket we have found.
3052 * When the xattr's hash value is in the gap of 2 buckets, we will
3053 * always set it to the previous bucket.
3056 lower_blkno = p_blkno;
3058 /* This should be in cache - we just read it during the search */
3059 ret = ocfs2_read_xattr_bucket(xs->bucket, lower_blkno);
3065 xs->header = bucket_xh(xs->bucket);
3066 xs->base = bucket_block(xs->bucket, 0);
3067 xs->end = xs->base + inode->i_sb->s_blocksize;
3070 xs->here = &xs->header->xh_entries[index];
3071 mlog(0, "find xattr %s in bucket %llu, entry = %u\n", name,
3072 (unsigned long long)bucket_blkno(xs->bucket), index);
3077 ocfs2_xattr_bucket_free(search);
3081 static int ocfs2_xattr_index_block_find(struct inode *inode,
3082 struct buffer_head *root_bh,
3085 struct ocfs2_xattr_search *xs)
3088 struct ocfs2_xattr_block *xb =
3089 (struct ocfs2_xattr_block *)root_bh->b_data;
3090 struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root;
3091 struct ocfs2_extent_list *el = &xb_root->xt_list;
3093 u32 first_hash, num_clusters = 0;
3094 u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name));
3096 if (le16_to_cpu(el->l_next_free_rec) == 0)
3099 mlog(0, "find xattr %s, hash = %u, index = %d in xattr tree\n",
3100 name, name_hash, name_index);
3102 ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &first_hash,
3109 BUG_ON(p_blkno == 0 || num_clusters == 0 || first_hash > name_hash);
3111 mlog(0, "find xattr extent rec %u clusters from %llu, the first hash "
3112 "in the rec is %u\n", num_clusters, (unsigned long long)p_blkno,
3115 ret = ocfs2_xattr_bucket_find(inode, name_index, name, name_hash,
3116 p_blkno, first_hash, num_clusters, xs);
3122 static int ocfs2_iterate_xattr_buckets(struct inode *inode,
3125 xattr_bucket_func *func,
3129 u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb));
3130 u32 num_buckets = clusters * bpc;
3131 struct ocfs2_xattr_bucket *bucket;
3133 bucket = ocfs2_xattr_bucket_new(inode);
3135 mlog_errno(-ENOMEM);
3139 mlog(0, "iterating xattr buckets in %u clusters starting from %llu\n",
3140 clusters, (unsigned long long)blkno);
3142 for (i = 0; i < num_buckets; i++, blkno += bucket->bu_blocks) {
3143 ret = ocfs2_read_xattr_bucket(bucket, blkno);
3150 * The real bucket num in this series of blocks is stored
3151 * in the 1st bucket.
3154 num_buckets = le16_to_cpu(bucket_xh(bucket)->xh_num_buckets);
3156 mlog(0, "iterating xattr bucket %llu, first hash %u\n",
3157 (unsigned long long)blkno,
3158 le32_to_cpu(bucket_xh(bucket)->xh_entries[0].xe_name_hash));
3160 ret = func(inode, bucket, para);
3161 if (ret && ret != -ERANGE)
3163 /* Fall through to bucket_relse() */
3166 ocfs2_xattr_bucket_relse(bucket);
3171 ocfs2_xattr_bucket_free(bucket);
3175 struct ocfs2_xattr_tree_list {
3181 static int ocfs2_xattr_bucket_get_name_value(struct inode *inode,
3182 struct ocfs2_xattr_header *xh,
3189 if (index < 0 || index >= le16_to_cpu(xh->xh_count))
3192 name_offset = le16_to_cpu(xh->xh_entries[index].xe_name_offset);
3194 *block_off = name_offset >> inode->i_sb->s_blocksize_bits;
3195 *new_offset = name_offset % inode->i_sb->s_blocksize;
3200 static int ocfs2_list_xattr_bucket(struct inode *inode,
3201 struct ocfs2_xattr_bucket *bucket,
3205 struct ocfs2_xattr_tree_list *xl = (struct ocfs2_xattr_tree_list *)para;
3206 int i, block_off, new_offset;
3207 const char *prefix, *name;
3209 for (i = 0 ; i < le16_to_cpu(bucket_xh(bucket)->xh_count); i++) {
3210 struct ocfs2_xattr_entry *entry = &bucket_xh(bucket)->xh_entries[i];
3211 type = ocfs2_xattr_get_type(entry);
3212 prefix = ocfs2_xattr_prefix(type);
3215 ret = ocfs2_xattr_bucket_get_name_value(inode,
3223 name = (const char *)bucket_block(bucket, block_off) +
3225 ret = ocfs2_xattr_list_entry(xl->buffer,
3229 entry->xe_name_len);
3238 static int ocfs2_xattr_tree_list_index_block(struct inode *inode,
3239 struct ocfs2_xattr_tree_root *xt,
3243 struct ocfs2_extent_list *el = &xt->xt_list;
3245 u32 name_hash = UINT_MAX, e_cpos = 0, num_clusters = 0;
3247 struct ocfs2_xattr_tree_list xl = {
3249 .buffer_size = buffer_size,
3253 if (le16_to_cpu(el->l_next_free_rec) == 0)
3256 while (name_hash > 0) {
3257 ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno,
3258 &e_cpos, &num_clusters, el);
3264 ret = ocfs2_iterate_xattr_buckets(inode, p_blkno, num_clusters,
3265 ocfs2_list_xattr_bucket,
3276 name_hash = e_cpos - 1;
3284 static int cmp_xe(const void *a, const void *b)
3286 const struct ocfs2_xattr_entry *l = a, *r = b;
3287 u32 l_hash = le32_to_cpu(l->xe_name_hash);
3288 u32 r_hash = le32_to_cpu(r->xe_name_hash);
3290 if (l_hash > r_hash)
3292 if (l_hash < r_hash)
3297 static void swap_xe(void *a, void *b, int size)
3299 struct ocfs2_xattr_entry *l = a, *r = b, tmp;
3302 memcpy(l, r, sizeof(struct ocfs2_xattr_entry));
3303 memcpy(r, &tmp, sizeof(struct ocfs2_xattr_entry));
3307 * When the ocfs2_xattr_block is filled up, new bucket will be created
3308 * and all the xattr entries will be moved to the new bucket.
3309 * The header goes at the start of the bucket, and the names+values are
3310 * filled from the end. This is why *target starts as the last buffer.
3311 * Note: we need to sort the entries since they are not saved in order
3312 * in the ocfs2_xattr_block.
3314 static void ocfs2_cp_xattr_block_to_bucket(struct inode *inode,
3315 struct buffer_head *xb_bh,
3316 struct ocfs2_xattr_bucket *bucket)
3318 int i, blocksize = inode->i_sb->s_blocksize;
3319 int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
3320 u16 offset, size, off_change;
3321 struct ocfs2_xattr_entry *xe;
3322 struct ocfs2_xattr_block *xb =
3323 (struct ocfs2_xattr_block *)xb_bh->b_data;
3324 struct ocfs2_xattr_header *xb_xh = &xb->xb_attrs.xb_header;
3325 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
3326 u16 count = le16_to_cpu(xb_xh->xh_count);
3327 char *src = xb_bh->b_data;
3328 char *target = bucket_block(bucket, blks - 1);
3330 mlog(0, "cp xattr from block %llu to bucket %llu\n",
3331 (unsigned long long)xb_bh->b_blocknr,
3332 (unsigned long long)bucket_blkno(bucket));
3334 for (i = 0; i < blks; i++)
3335 memset(bucket_block(bucket, i), 0, blocksize);
3338 * Since the xe_name_offset is based on ocfs2_xattr_header,
3339 * there is a offset change corresponding to the change of
3340 * ocfs2_xattr_header's position.
3342 off_change = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header);
3343 xe = &xb_xh->xh_entries[count - 1];
3344 offset = le16_to_cpu(xe->xe_name_offset) + off_change;
3345 size = blocksize - offset;
3347 /* copy all the names and values. */
3348 memcpy(target + offset, src + offset, size);
3350 /* Init new header now. */
3351 xh->xh_count = xb_xh->xh_count;
3352 xh->xh_num_buckets = cpu_to_le16(1);
3353 xh->xh_name_value_len = cpu_to_le16(size);
3354 xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE - size);
3356 /* copy all the entries. */
3357 target = bucket_block(bucket, 0);
3358 offset = offsetof(struct ocfs2_xattr_header, xh_entries);
3359 size = count * sizeof(struct ocfs2_xattr_entry);
3360 memcpy(target + offset, (char *)xb_xh + offset, size);
3362 /* Change the xe offset for all the xe because of the move. */
3363 off_change = OCFS2_XATTR_BUCKET_SIZE - blocksize +
3364 offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header);
3365 for (i = 0; i < count; i++)
3366 le16_add_cpu(&xh->xh_entries[i].xe_name_offset, off_change);
3368 mlog(0, "copy entry: start = %u, size = %u, offset_change = %u\n",
3369 offset, size, off_change);
3371 sort(target + offset, count, sizeof(struct ocfs2_xattr_entry),
3376 * After we move xattr from block to index btree, we have to
3377 * update ocfs2_xattr_search to the new xe and base.
3379 * When the entry is in xattr block, xattr_bh indicates the storage place.
3380 * While if the entry is in index b-tree, "bucket" indicates the
3381 * real place of the xattr.
3383 static void ocfs2_xattr_update_xattr_search(struct inode *inode,
3384 struct ocfs2_xattr_search *xs,
3385 struct buffer_head *old_bh)
3387 char *buf = old_bh->b_data;
3388 struct ocfs2_xattr_block *old_xb = (struct ocfs2_xattr_block *)buf;
3389 struct ocfs2_xattr_header *old_xh = &old_xb->xb_attrs.xb_header;
3392 xs->header = bucket_xh(xs->bucket);
3393 xs->base = bucket_block(xs->bucket, 0);
3394 xs->end = xs->base + inode->i_sb->s_blocksize;
3399 i = xs->here - old_xh->xh_entries;
3400 xs->here = &xs->header->xh_entries[i];
3403 static int ocfs2_xattr_create_index_block(struct inode *inode,
3404 struct ocfs2_xattr_search *xs,
3405 struct ocfs2_xattr_set_ctxt *ctxt)
3410 handle_t *handle = ctxt->handle;
3411 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
3412 struct ocfs2_inode_info *oi = OCFS2_I(inode);
3413 struct buffer_head *xb_bh = xs->xattr_bh;
3414 struct ocfs2_xattr_block *xb =
3415 (struct ocfs2_xattr_block *)xb_bh->b_data;
3416 struct ocfs2_xattr_tree_root *xr;
3417 u16 xb_flags = le16_to_cpu(xb->xb_flags);
3419 mlog(0, "create xattr index block for %llu\n",
3420 (unsigned long long)xb_bh->b_blocknr);
3422 BUG_ON(xb_flags & OCFS2_XATTR_INDEXED);
3423 BUG_ON(!xs->bucket);
3427 * We can use this lock for now, and maybe move to a dedicated mutex
3428 * if performance becomes a problem later.
3430 down_write(&oi->ip_alloc_sem);
3432 ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), xb_bh,
3433 OCFS2_JOURNAL_ACCESS_WRITE);
3439 ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac,
3440 1, 1, &bit_off, &len);
3447 * The bucket may spread in many blocks, and
3448 * we will only touch the 1st block and the last block
3449 * in the whole bucket(one for entry and one for data).
3451 blkno = ocfs2_clusters_to_blocks(inode->i_sb, bit_off);
3453 mlog(0, "allocate 1 cluster from %llu to xattr block\n",
3454 (unsigned long long)blkno);
3456 ret = ocfs2_init_xattr_bucket(xs->bucket, blkno);
3462 ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket,
3463 OCFS2_JOURNAL_ACCESS_CREATE);
3469 ocfs2_cp_xattr_block_to_bucket(inode, xb_bh, xs->bucket);
3470 ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket);
3472 ocfs2_xattr_update_xattr_search(inode, xs, xb_bh);
3474 /* Change from ocfs2_xattr_header to ocfs2_xattr_tree_root */
3475 memset(&xb->xb_attrs, 0, inode->i_sb->s_blocksize -
3476 offsetof(struct ocfs2_xattr_block, xb_attrs));
3478 xr = &xb->xb_attrs.xb_root;
3479 xr->xt_clusters = cpu_to_le32(1);
3480 xr->xt_last_eb_blk = 0;
3481 xr->xt_list.l_tree_depth = 0;
3482 xr->xt_list.l_count = cpu_to_le16(ocfs2_xattr_recs_per_xb(inode->i_sb));
3483 xr->xt_list.l_next_free_rec = cpu_to_le16(1);
3485 xr->xt_list.l_recs[0].e_cpos = 0;
3486 xr->xt_list.l_recs[0].e_blkno = cpu_to_le64(blkno);
3487 xr->xt_list.l_recs[0].e_leaf_clusters = cpu_to_le16(1);
3489 xb->xb_flags = cpu_to_le16(xb_flags | OCFS2_XATTR_INDEXED);
3491 ocfs2_journal_dirty(handle, xb_bh);
3494 up_write(&oi->ip_alloc_sem);
3499 static int cmp_xe_offset(const void *a, const void *b)
3501 const struct ocfs2_xattr_entry *l = a, *r = b;
3502 u32 l_name_offset = le16_to_cpu(l->xe_name_offset);
3503 u32 r_name_offset = le16_to_cpu(r->xe_name_offset);
3505 if (l_name_offset < r_name_offset)
3507 if (l_name_offset > r_name_offset)
3513 * defrag a xattr bucket if we find that the bucket has some
3514 * holes beteen name/value pairs.
3515 * We will move all the name/value pairs to the end of the bucket
3516 * so that we can spare some space for insertion.
3518 static int ocfs2_defrag_xattr_bucket(struct inode *inode,
3520 struct ocfs2_xattr_bucket *bucket)
3523 size_t end, offset, len, value_len;
3524 struct ocfs2_xattr_header *xh;
3525 char *entries, *buf, *bucket_buf = NULL;
3526 u64 blkno = bucket_blkno(bucket);
3528 size_t blocksize = inode->i_sb->s_blocksize;
3529 struct ocfs2_xattr_entry *xe;
3532 * In order to make the operation more efficient and generic,
3533 * we copy all the blocks into a contiguous memory and do the
3534 * defragment there, so if anything is error, we will not touch
3537 bucket_buf = kmalloc(OCFS2_XATTR_BUCKET_SIZE, GFP_NOFS);
3544 for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize)
3545 memcpy(buf, bucket_block(bucket, i), blocksize);
3547 ret = ocfs2_xattr_bucket_journal_access(handle, bucket,
3548 OCFS2_JOURNAL_ACCESS_WRITE);
3554 xh = (struct ocfs2_xattr_header *)bucket_buf;
3555 entries = (char *)xh->xh_entries;
3556 xh_free_start = le16_to_cpu(xh->xh_free_start);
3558 mlog(0, "adjust xattr bucket in %llu, count = %u, "
3559 "xh_free_start = %u, xh_name_value_len = %u.\n",
3560 (unsigned long long)blkno, le16_to_cpu(xh->xh_count),
3561 xh_free_start, le16_to_cpu(xh->xh_name_value_len));
3564 * sort all the entries by their offset.
3565 * the largest will be the first, so that we can
3566 * move them to the end one by one.
3568 sort(entries, le16_to_cpu(xh->xh_count),
3569 sizeof(struct ocfs2_xattr_entry),
3570 cmp_xe_offset, swap_xe);
3572 /* Move all name/values to the end of the bucket. */
3573 xe = xh->xh_entries;
3574 end = OCFS2_XATTR_BUCKET_SIZE;
3575 for (i = 0; i < le16_to_cpu(xh->xh_count); i++, xe++) {
3576 offset = le16_to_cpu(xe->xe_name_offset);
3577 if (ocfs2_xattr_is_local(xe))
3578 value_len = OCFS2_XATTR_SIZE(
3579 le64_to_cpu(xe->xe_value_size));
3581 value_len = OCFS2_XATTR_ROOT_SIZE;
3582 len = OCFS2_XATTR_SIZE(xe->xe_name_len) + value_len;
3585 * We must make sure that the name/value pair
3586 * exist in the same block. So adjust end to
3587 * the previous block end if needed.
3589 if (((end - len) / blocksize !=
3590 (end - 1) / blocksize))
3591 end = end - end % blocksize;
3593 if (end > offset + len) {
3594 memmove(bucket_buf + end - len,
3595 bucket_buf + offset, len);
3596 xe->xe_name_offset = cpu_to_le16(end - len);
3599 mlog_bug_on_msg(end < offset + len, "Defrag check failed for "
3600 "bucket %llu\n", (unsigned long long)blkno);
3605 mlog_bug_on_msg(xh_free_start > end, "Defrag check failed for "
3606 "bucket %llu\n", (unsigned long long)blkno);
3608 if (xh_free_start == end)
3611 memset(bucket_buf + xh_free_start, 0, end - xh_free_start);
3612 xh->xh_free_start = cpu_to_le16(end);
3614 /* sort the entries by their name_hash. */
3615 sort(entries, le16_to_cpu(xh->xh_count),
3616 sizeof(struct ocfs2_xattr_entry),
3620 for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize)
3621 memcpy(bucket_block(bucket, i), buf, blocksize);
3622 ocfs2_xattr_bucket_journal_dirty(handle, bucket);
3630 * prev_blkno points to the start of an existing extent. new_blkno
3631 * points to a newly allocated extent. Because we know each of our
3632 * clusters contains more than bucket, we can easily split one cluster
3633 * at a bucket boundary. So we take the last cluster of the existing
3634 * extent and split it down the middle. We move the last half of the
3635 * buckets in the last cluster of the existing extent over to the new
3638 * first_bh is the buffer at prev_blkno so we can update the existing
3639 * extent's bucket count. header_bh is the bucket were we were hoping
3640 * to insert our xattr. If the bucket move places the target in the new
3641 * extent, we'll update first_bh and header_bh after modifying the old
3644 * first_hash will be set as the 1st xe's name_hash in the new extent.
3646 static int ocfs2_mv_xattr_bucket_cross_cluster(struct inode *inode,
3648 struct ocfs2_xattr_bucket *first,
3649 struct ocfs2_xattr_bucket *target,
3655 struct super_block *sb = inode->i_sb;
3656 int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(sb);
3657 int num_buckets = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(sb));
3658 int to_move = num_buckets / 2;
3660 u64 last_cluster_blkno = bucket_blkno(first) +
3661 ((num_clusters - 1) * ocfs2_clusters_to_blocks(sb, 1));
3663 BUG_ON(le16_to_cpu(bucket_xh(first)->xh_num_buckets) < num_buckets);
3664 BUG_ON(OCFS2_XATTR_BUCKET_SIZE == OCFS2_SB(sb)->s_clustersize);
3666 mlog(0, "move half of xattrs in cluster %llu to %llu\n",
3667 (unsigned long long)last_cluster_blkno, (unsigned long long)new_blkno);
3669 ret = ocfs2_mv_xattr_buckets(inode, handle, bucket_blkno(first),
3670 last_cluster_blkno, new_blkno,
3671 to_move, first_hash);
3677 /* This is the first bucket that got moved */
3678 src_blkno = last_cluster_blkno + (to_move * blks_per_bucket);
3681 * If the target bucket was part of the moved buckets, we need to
3682 * update first and target.
3684 if (bucket_blkno(target) >= src_blkno) {
3685 /* Find the block for the new target bucket */
3686 src_blkno = new_blkno +
3687 (bucket_blkno(target) - src_blkno);
3689 ocfs2_xattr_bucket_relse(first);
3690 ocfs2_xattr_bucket_relse(target);
3693 * These shouldn't fail - the buffers are in the
3694 * journal from ocfs2_cp_xattr_bucket().
3696 ret = ocfs2_read_xattr_bucket(first, new_blkno);
3701 ret = ocfs2_read_xattr_bucket(target, src_blkno);
3712 * Find the suitable pos when we divide a bucket into 2.
3713 * We have to make sure the xattrs with the same hash value exist
3714 * in the same bucket.
3716 * If this ocfs2_xattr_header covers more than one hash value, find a
3717 * place where the hash value changes. Try to find the most even split.
3718 * The most common case is that all entries have different hash values,
3719 * and the first check we make will find a place to split.
3721 static int ocfs2_xattr_find_divide_pos(struct ocfs2_xattr_header *xh)
3723 struct ocfs2_xattr_entry *entries = xh->xh_entries;
3724 int count = le16_to_cpu(xh->xh_count);
3725 int delta, middle = count / 2;
3728 * We start at the middle. Each step gets farther away in both
3729 * directions. We therefore hit the change in hash value
3730 * nearest to the middle. Note that this loop does not execute for
3733 for (delta = 0; delta < middle; delta++) {
3734 /* Let's check delta earlier than middle */
3735 if (cmp_xe(&entries[middle - delta - 1],
3736 &entries[middle - delta]))
3737 return middle - delta;
3739 /* For even counts, don't walk off the end */
3740 if ((middle + delta + 1) == count)
3743 /* Now try delta past middle */
3744 if (cmp_xe(&entries[middle + delta],
3745 &entries[middle + delta + 1]))
3746 return middle + delta + 1;
3749 /* Every entry had the same hash */
3754 * Move some xattrs in old bucket(blk) to new bucket(new_blk).
3755 * first_hash will record the 1st hash of the new bucket.
3757 * Normally half of the xattrs will be moved. But we have to make
3758 * sure that the xattrs with the same hash value are stored in the
3759 * same bucket. If all the xattrs in this bucket have the same hash
3760 * value, the new bucket will be initialized as an empty one and the
3761 * first_hash will be initialized as (hash_value+1).
3763 static int ocfs2_divide_xattr_bucket(struct inode *inode,
3768 int new_bucket_head)
3771 int count, start, len, name_value_len = 0, xe_len, name_offset = 0;
3772 struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL;
3773 struct ocfs2_xattr_header *xh;
3774 struct ocfs2_xattr_entry *xe;
3775 int blocksize = inode->i_sb->s_blocksize;
3777 mlog(0, "move some of xattrs from bucket %llu to %llu\n",
3778 (unsigned long long)blk, (unsigned long long)new_blk);
3780 s_bucket = ocfs2_xattr_bucket_new(inode);
3781 t_bucket = ocfs2_xattr_bucket_new(inode);
3782 if (!s_bucket || !t_bucket) {
3788 ret = ocfs2_read_xattr_bucket(s_bucket, blk);
3794 ret = ocfs2_xattr_bucket_journal_access(handle, s_bucket,
3795 OCFS2_JOURNAL_ACCESS_WRITE);
3802 * Even if !new_bucket_head, we're overwriting t_bucket. Thus,
3803 * there's no need to read it.
3805 ret = ocfs2_init_xattr_bucket(t_bucket, new_blk);
3812 * Hey, if we're overwriting t_bucket, what difference does
3813 * ACCESS_CREATE vs ACCESS_WRITE make? See the comment in the
3814 * same part of ocfs2_cp_xattr_bucket().
3816 ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket,
3818 OCFS2_JOURNAL_ACCESS_CREATE :
3819 OCFS2_JOURNAL_ACCESS_WRITE);
3825 xh = bucket_xh(s_bucket);
3826 count = le16_to_cpu(xh->xh_count);
3827 start = ocfs2_xattr_find_divide_pos(xh);
3829 if (start == count) {
3830 xe = &xh->xh_entries[start-1];
3833 * initialized a new empty bucket here.
3834 * The hash value is set as one larger than
3835 * that of the last entry in the previous bucket.
3837 for (i = 0; i < t_bucket->bu_blocks; i++)
3838 memset(bucket_block(t_bucket, i), 0, blocksize);
3840 xh = bucket_xh(t_bucket);
3841 xh->xh_free_start = cpu_to_le16(blocksize);
3842 xh->xh_entries[0].xe_name_hash = xe->xe_name_hash;
3843 le32_add_cpu(&xh->xh_entries[0].xe_name_hash, 1);
3845 goto set_num_buckets;
3848 /* copy the whole bucket to the new first. */
3849 ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket);
3851 /* update the new bucket. */
3852 xh = bucket_xh(t_bucket);
3855 * Calculate the total name/value len and xh_free_start for
3856 * the old bucket first.
3858 name_offset = OCFS2_XATTR_BUCKET_SIZE;
3860 for (i = 0; i < start; i++) {
3861 xe = &xh->xh_entries[i];
3862 xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
3863 if (ocfs2_xattr_is_local(xe))
3865 OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size));
3867 xe_len += OCFS2_XATTR_ROOT_SIZE;
3868 name_value_len += xe_len;
3869 if (le16_to_cpu(xe->xe_name_offset) < name_offset)
3870 name_offset = le16_to_cpu(xe->xe_name_offset);
3874 * Now begin the modification to the new bucket.
3876 * In the new bucket, We just move the xattr entry to the beginning
3877 * and don't touch the name/value. So there will be some holes in the
3878 * bucket, and they will be removed when ocfs2_defrag_xattr_bucket is
3881 xe = &xh->xh_entries[start];
3882 len = sizeof(struct ocfs2_xattr_entry) * (count - start);
3883 mlog(0, "mv xattr entry len %d from %d to %d\n", len,
3884 (int)((char *)xe - (char *)xh),
3885 (int)((char *)xh->xh_entries - (char *)xh));
3886 memmove((char *)xh->xh_entries, (char *)xe, len);
3887 xe = &xh->xh_entries[count - start];
3888 len = sizeof(struct ocfs2_xattr_entry) * start;
3889 memset((char *)xe, 0, len);
3891 le16_add_cpu(&xh->xh_count, -start);
3892 le16_add_cpu(&xh->xh_name_value_len, -name_value_len);
3894 /* Calculate xh_free_start for the new bucket. */
3895 xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE);
3896 for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
3897 xe = &xh->xh_entries[i];
3898 xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
3899 if (ocfs2_xattr_is_local(xe))
3901 OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size));
3903 xe_len += OCFS2_XATTR_ROOT_SIZE;
3904 if (le16_to_cpu(xe->xe_name_offset) <
3905 le16_to_cpu(xh->xh_free_start))
3906 xh->xh_free_start = xe->xe_name_offset;
3910 /* set xh->xh_num_buckets for the new xh. */
3911 if (new_bucket_head)
3912 xh->xh_num_buckets = cpu_to_le16(1);
3914 xh->xh_num_buckets = 0;
3916 ocfs2_xattr_bucket_journal_dirty(handle, t_bucket);
3918 /* store the first_hash of the new bucket. */
3920 *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash);
3923 * Now only update the 1st block of the old bucket. If we
3924 * just added a new empty bucket, there is no need to modify
3930 xh = bucket_xh(s_bucket);
3931 memset(&xh->xh_entries[start], 0,
3932 sizeof(struct ocfs2_xattr_entry) * (count - start));
3933 xh->xh_count = cpu_to_le16(start);
3934 xh->xh_free_start = cpu_to_le16(name_offset);
3935 xh->xh_name_value_len = cpu_to_le16(name_value_len);
3937 ocfs2_xattr_bucket_journal_dirty(handle, s_bucket);
3940 ocfs2_xattr_bucket_free(s_bucket);
3941 ocfs2_xattr_bucket_free(t_bucket);
3947 * Copy xattr from one bucket to another bucket.
3949 * The caller must make sure that the journal transaction
3950 * has enough space for journaling.
3952 static int ocfs2_cp_xattr_bucket(struct inode *inode,
3959 struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL;
3961 BUG_ON(s_blkno == t_blkno);
3963 mlog(0, "cp bucket %llu to %llu, target is %d\n",
3964 (unsigned long long)s_blkno, (unsigned long long)t_blkno,
3967 s_bucket = ocfs2_xattr_bucket_new(inode);
3968 t_bucket = ocfs2_xattr_bucket_new(inode);
3969 if (!s_bucket || !t_bucket) {
3975 ret = ocfs2_read_xattr_bucket(s_bucket, s_blkno);
3980 * Even if !t_is_new, we're overwriting t_bucket. Thus,
3981 * there's no need to read it.
3983 ret = ocfs2_init_xattr_bucket(t_bucket, t_blkno);
3988 * Hey, if we're overwriting t_bucket, what difference does
3989 * ACCESS_CREATE vs ACCESS_WRITE make? Well, if we allocated a new
3990 * cluster to fill, we came here from
3991 * ocfs2_mv_xattr_buckets(), and it is really new -
3992 * ACCESS_CREATE is required. But we also might have moved data
3993 * out of t_bucket before extending back into it.
3994 * ocfs2_add_new_xattr_bucket() can do this - its call to
3995 * ocfs2_add_new_xattr_cluster() may have created a new extent
3996 * and copied out the end of the old extent. Then it re-extends
3997 * the old extent back to create space for new xattrs. That's
3998 * how we get here, and the bucket isn't really new.
4000 ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket,
4002 OCFS2_JOURNAL_ACCESS_CREATE :
4003 OCFS2_JOURNAL_ACCESS_WRITE);
4007 ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket);
4008 ocfs2_xattr_bucket_journal_dirty(handle, t_bucket);
4011 ocfs2_xattr_bucket_free(t_bucket);
4012 ocfs2_xattr_bucket_free(s_bucket);
4018 * src_blk points to the start of an existing extent. last_blk points to
4019 * last cluster in that extent. to_blk points to a newly allocated
4020 * extent. We copy the buckets from the cluster at last_blk to the new
4021 * extent. If start_bucket is non-zero, we skip that many buckets before
4022 * we start copying. The new extent's xh_num_buckets gets set to the
4023 * number of buckets we copied. The old extent's xh_num_buckets shrinks
4024 * by the same amount.
4026 static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle,
4027 u64 src_blk, u64 last_blk, u64 to_blk,
4028 unsigned int start_bucket,
4031 int i, ret, credits;
4032 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
4033 int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
4034 int num_buckets = ocfs2_xattr_buckets_per_cluster(osb);
4035 struct ocfs2_xattr_bucket *old_first, *new_first;
4037 mlog(0, "mv xattrs from cluster %llu to %llu\n",
4038 (unsigned long long)last_blk, (unsigned long long)to_blk);
4040 BUG_ON(start_bucket >= num_buckets);
4042 num_buckets -= start_bucket;
4043 last_blk += (start_bucket * blks_per_bucket);
4046 /* The first bucket of the original extent */
4047 old_first = ocfs2_xattr_bucket_new(inode);
4048 /* The first bucket of the new extent */
4049 new_first = ocfs2_xattr_bucket_new(inode);
4050 if (!old_first || !new_first) {
4056 ret = ocfs2_read_xattr_bucket(old_first, src_blk);
4063 * We need to update the first bucket of the old extent and all
4064 * the buckets going to the new extent.
4066 credits = ((num_buckets + 1) * blks_per_bucket) +
4067 handle->h_buffer_credits;
4068 ret = ocfs2_extend_trans(handle, credits);
4074 ret = ocfs2_xattr_bucket_journal_access(handle, old_first,
4075 OCFS2_JOURNAL_ACCESS_WRITE);
4081 for (i = 0; i < num_buckets; i++) {
4082 ret = ocfs2_cp_xattr_bucket(inode, handle,
4083 last_blk + (i * blks_per_bucket),
4084 to_blk + (i * blks_per_bucket),
4093 * Get the new bucket ready before we dirty anything
4094 * (This actually shouldn't fail, because we already dirtied
4095 * it once in ocfs2_cp_xattr_bucket()).
4097 ret = ocfs2_read_xattr_bucket(new_first, to_blk);
4102 ret = ocfs2_xattr_bucket_journal_access(handle, new_first,
4103 OCFS2_JOURNAL_ACCESS_WRITE);
4109 /* Now update the headers */
4110 le16_add_cpu(&bucket_xh(old_first)->xh_num_buckets, -num_buckets);
4111 ocfs2_xattr_bucket_journal_dirty(handle, old_first);
4113 bucket_xh(new_first)->xh_num_buckets = cpu_to_le16(num_buckets);
4114 ocfs2_xattr_bucket_journal_dirty(handle, new_first);
4117 *first_hash = le32_to_cpu(bucket_xh(new_first)->xh_entries[0].xe_name_hash);
4120 ocfs2_xattr_bucket_free(new_first);
4121 ocfs2_xattr_bucket_free(old_first);
4126 * Move some xattrs in this cluster to the new cluster.
4127 * This function should only be called when bucket size == cluster size.
4128 * Otherwise ocfs2_mv_xattr_bucket_cross_cluster should be used instead.
4130 static int ocfs2_divide_xattr_cluster(struct inode *inode,
4136 u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
4137 int ret, credits = 2 * blk_per_bucket + handle->h_buffer_credits;
4139 BUG_ON(OCFS2_XATTR_BUCKET_SIZE < OCFS2_SB(inode->i_sb)->s_clustersize);
4141 ret = ocfs2_extend_trans(handle, credits);
4147 /* Move half of the xattr in start_blk to the next bucket. */
4148 return ocfs2_divide_xattr_bucket(inode, handle, prev_blk,
4149 new_blk, first_hash, 1);
4153 * Move some xattrs from the old cluster to the new one since they are not
4154 * contiguous in ocfs2 xattr tree.
4156 * new_blk starts a new separate cluster, and we will move some xattrs from
4157 * prev_blk to it. v_start will be set as the first name hash value in this
4158 * new cluster so that it can be used as e_cpos during tree insertion and
4159 * don't collide with our original b-tree operations. first_bh and header_bh
4160 * will also be updated since they will be used in ocfs2_extend_xattr_bucket
4161 * to extend the insert bucket.
4163 * The problem is how much xattr should we move to the new one and when should
4164 * we update first_bh and header_bh?
4165 * 1. If cluster size > bucket size, that means the previous cluster has more
4166 * than 1 bucket, so just move half nums of bucket into the new cluster and
4167 * update the first_bh and header_bh if the insert bucket has been moved
4168 * to the new cluster.
4169 * 2. If cluster_size == bucket_size:
4170 * a) If the previous extent rec has more than one cluster and the insert
4171 * place isn't in the last cluster, copy the entire last cluster to the
4172 * new one. This time, we don't need to upate the first_bh and header_bh
4173 * since they will not be moved into the new cluster.
4174 * b) Otherwise, move the bottom half of the xattrs in the last cluster into
4175 * the new one. And we set the extend flag to zero if the insert place is
4176 * moved into the new allocated cluster since no extend is needed.
4178 static int ocfs2_adjust_xattr_cross_cluster(struct inode *inode,
4180 struct ocfs2_xattr_bucket *first,
4181 struct ocfs2_xattr_bucket *target,
4189 mlog(0, "adjust xattrs from cluster %llu len %u to %llu\n",
4190 (unsigned long long)bucket_blkno(first), prev_clusters,
4191 (unsigned long long)new_blk);
4193 if (ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)) > 1) {
4194 ret = ocfs2_mv_xattr_bucket_cross_cluster(inode,
4203 /* The start of the last cluster in the first extent */
4204 u64 last_blk = bucket_blkno(first) +
4205 ((prev_clusters - 1) *
4206 ocfs2_clusters_to_blocks(inode->i_sb, 1));
4208 if (prev_clusters > 1 && bucket_blkno(target) != last_blk) {
4209 ret = ocfs2_mv_xattr_buckets(inode, handle,
4210 bucket_blkno(first),
4211 last_blk, new_blk, 0,
4216 ret = ocfs2_divide_xattr_cluster(inode, handle,
4222 if ((bucket_blkno(target) == last_blk) && extend)
4231 * Add a new cluster for xattr storage.
4233 * If the new cluster is contiguous with the previous one, it will be
4234 * appended to the same extent record, and num_clusters will be updated.
4235 * If not, we will insert a new extent for it and move some xattrs in
4236 * the last cluster into the new allocated one.
4237 * We also need to limit the maximum size of a btree leaf, otherwise we'll
4238 * lose the benefits of hashing because we'll have to search large leaves.
4239 * So now the maximum size is OCFS2_MAX_XATTR_TREE_LEAF_SIZE(or clustersize,
4242 * first_bh is the first block of the previous extent rec and header_bh
4243 * indicates the bucket we will insert the new xattrs. They will be updated
4244 * when the header_bh is moved into the new cluster.
4246 static int ocfs2_add_new_xattr_cluster(struct inode *inode,
4247 struct buffer_head *root_bh,
4248 struct ocfs2_xattr_bucket *first,
4249 struct ocfs2_xattr_bucket *target,
4253 struct ocfs2_xattr_set_ctxt *ctxt)
4256 u16 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1);
4257 u32 prev_clusters = *num_clusters;
4258 u32 clusters_to_add = 1, bit_off, num_bits, v_start = 0;
4260 handle_t *handle = ctxt->handle;
4261 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
4262 struct ocfs2_extent_tree et;
4264 mlog(0, "Add new xattr cluster for %llu, previous xattr hash = %u, "
4265 "previous xattr blkno = %llu\n",
4266 (unsigned long long)OCFS2_I(inode)->ip_blkno,
4267 prev_cpos, (unsigned long long)bucket_blkno(first));
4269 ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh);
4271 ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), root_bh,
4272 OCFS2_JOURNAL_ACCESS_WRITE);
4278 ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac, 1,
4279 clusters_to_add, &bit_off, &num_bits);
4286 BUG_ON(num_bits > clusters_to_add);
4288 block = ocfs2_clusters_to_blocks(osb->sb, bit_off);
4289 mlog(0, "Allocating %u clusters at block %u for xattr in inode %llu\n",
4290 num_bits, bit_off, (unsigned long long)OCFS2_I(inode)->ip_blkno);
4292 if (bucket_blkno(first) + (prev_clusters * bpc) == block &&
4293 (prev_clusters + num_bits) << osb->s_clustersize_bits <=
4294 OCFS2_MAX_XATTR_TREE_LEAF_SIZE) {
4296 * If this cluster is contiguous with the old one and
4297 * adding this new cluster, we don't surpass the limit of
4298 * OCFS2_MAX_XATTR_TREE_LEAF_SIZE, cool. We will let it be
4299 * initialized and used like other buckets in the previous
4301 * So add it as a contiguous one. The caller will handle
4304 v_start = prev_cpos + prev_clusters;
4305 *num_clusters = prev_clusters + num_bits;
4306 mlog(0, "Add contiguous %u clusters to previous extent rec.\n",
4309 ret = ocfs2_adjust_xattr_cross_cluster(inode,
4323 mlog(0, "Insert %u clusters at block %llu for xattr at %u\n",
4324 num_bits, (unsigned long long)block, v_start);
4325 ret = ocfs2_insert_extent(handle, &et, v_start, block,
4326 num_bits, 0, ctxt->meta_ac);
4332 ret = ocfs2_journal_dirty(handle, root_bh);
4341 * We are given an extent. 'first' is the bucket at the very front of
4342 * the extent. The extent has space for an additional bucket past
4343 * bucket_xh(first)->xh_num_buckets. 'target_blkno' is the block number
4344 * of the target bucket. We wish to shift every bucket past the target
4345 * down one, filling in that additional space. When we get back to the
4346 * target, we split the target between itself and the now-empty bucket
4347 * at target+1 (aka, target_blkno + blks_per_bucket).
4349 static int ocfs2_extend_xattr_bucket(struct inode *inode,
4351 struct ocfs2_xattr_bucket *first,
4356 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
4357 u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
4359 u16 new_bucket = le16_to_cpu(bucket_xh(first)->xh_num_buckets);
4361 mlog(0, "extend xattr bucket in %llu, xattr extend rec starting "
4362 "from %llu, len = %u\n", (unsigned long long)target_blk,
4363 (unsigned long long)bucket_blkno(first), num_clusters);
4365 /* The extent must have room for an additional bucket */
4366 BUG_ON(new_bucket >=
4367 (num_clusters * ocfs2_xattr_buckets_per_cluster(osb)));
4369 /* end_blk points to the last existing bucket */
4370 end_blk = bucket_blkno(first) + ((new_bucket - 1) * blk_per_bucket);
4373 * end_blk is the start of the last existing bucket.
4374 * Thus, (end_blk - target_blk) covers the target bucket and
4375 * every bucket after it up to, but not including, the last
4376 * existing bucket. Then we add the last existing bucket, the
4377 * new bucket, and the first bucket (3 * blk_per_bucket).
4379 credits = (end_blk - target_blk) + (3 * blk_per_bucket) +
4380 handle->h_buffer_credits;
4381 ret = ocfs2_extend_trans(handle, credits);
4387 ret = ocfs2_xattr_bucket_journal_access(handle, first,
4388 OCFS2_JOURNAL_ACCESS_WRITE);
4394 while (end_blk != target_blk) {
4395 ret = ocfs2_cp_xattr_bucket(inode, handle, end_blk,
4396 end_blk + blk_per_bucket, 0);
4399 end_blk -= blk_per_bucket;
4402 /* Move half of the xattr in target_blkno to the next bucket. */
4403 ret = ocfs2_divide_xattr_bucket(inode, handle, target_blk,
4404 target_blk + blk_per_bucket, NULL, 0);
4406 le16_add_cpu(&bucket_xh(first)->xh_num_buckets, 1);
4407 ocfs2_xattr_bucket_journal_dirty(handle, first);
4414 * Add new xattr bucket in an extent record and adjust the buckets
4415 * accordingly. xb_bh is the ocfs2_xattr_block, and target is the
4416 * bucket we want to insert into.
4418 * In the easy case, we will move all the buckets after target down by
4419 * one. Half of target's xattrs will be moved to the next bucket.
4421 * If current cluster is full, we'll allocate a new one. This may not
4422 * be contiguous. The underlying calls will make sure that there is
4423 * space for the insert, shifting buckets around if necessary.
4424 * 'target' may be moved by those calls.
4426 static int ocfs2_add_new_xattr_bucket(struct inode *inode,
4427 struct buffer_head *xb_bh,
4428 struct ocfs2_xattr_bucket *target,
4429 struct ocfs2_xattr_set_ctxt *ctxt)
4431 struct ocfs2_xattr_block *xb =
4432 (struct ocfs2_xattr_block *)xb_bh->b_data;
4433 struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root;
4434 struct ocfs2_extent_list *el = &xb_root->xt_list;
4436 le32_to_cpu(bucket_xh(target)->xh_entries[0].xe_name_hash);
4437 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
4438 int ret, num_buckets, extend = 1;
4440 u32 e_cpos, num_clusters;
4441 /* The bucket at the front of the extent */
4442 struct ocfs2_xattr_bucket *first;
4444 mlog(0, "Add new xattr bucket starting from %llu\n",
4445 (unsigned long long)bucket_blkno(target));
4447 /* The first bucket of the original extent */
4448 first = ocfs2_xattr_bucket_new(inode);
4455 ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &e_cpos,
4462 ret = ocfs2_read_xattr_bucket(first, p_blkno);
4468 num_buckets = ocfs2_xattr_buckets_per_cluster(osb) * num_clusters;
4469 if (num_buckets == le16_to_cpu(bucket_xh(first)->xh_num_buckets)) {
4471 * This can move first+target if the target bucket moves
4472 * to the new extent.
4474 ret = ocfs2_add_new_xattr_cluster(inode,
4489 ret = ocfs2_extend_xattr_bucket(inode,
4492 bucket_blkno(target),
4499 ocfs2_xattr_bucket_free(first);
4504 static inline char *ocfs2_xattr_bucket_get_val(struct inode *inode,
4505 struct ocfs2_xattr_bucket *bucket,
4508 int block_off = offs >> inode->i_sb->s_blocksize_bits;
4510 offs = offs % inode->i_sb->s_blocksize;
4511 return bucket_block(bucket, block_off) + offs;
4515 * Handle the normal xattr set, including replace, delete and new.
4517 * Note: "local" indicates the real data's locality. So we can't
4518 * just its bucket locality by its length.
4520 static void ocfs2_xattr_set_entry_normal(struct inode *inode,
4521 struct ocfs2_xattr_info *xi,
4522 struct ocfs2_xattr_search *xs,
4526 struct ocfs2_xattr_entry *last, *xe;
4527 int name_len = strlen(xi->name);
4528 struct ocfs2_xattr_header *xh = xs->header;
4529 u16 count = le16_to_cpu(xh->xh_count), start;
4530 size_t blocksize = inode->i_sb->s_blocksize;
4532 size_t offs, size, new_size;
4534 last = &xh->xh_entries[count];
4535 if (!xs->not_found) {
4537 offs = le16_to_cpu(xe->xe_name_offset);
4538 if (ocfs2_xattr_is_local(xe))
4539 size = OCFS2_XATTR_SIZE(name_len) +
4540 OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size));
4542 size = OCFS2_XATTR_SIZE(name_len) +
4543 OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE);
4546 * If the new value will be stored outside, xi->value has been
4547 * initalized as an empty ocfs2_xattr_value_root, and the same
4548 * goes with xi->value_len, so we can set new_size safely here.
4549 * See ocfs2_xattr_set_in_bucket.
4551 new_size = OCFS2_XATTR_SIZE(name_len) +
4552 OCFS2_XATTR_SIZE(xi->value_len);
4554 le16_add_cpu(&xh->xh_name_value_len, -size);
4556 if (new_size > size)
4557 goto set_new_name_value;
4559 /* Now replace the old value with new one. */
4561 xe->xe_value_size = cpu_to_le64(xi->value_len);
4563 xe->xe_value_size = 0;
4565 val = ocfs2_xattr_bucket_get_val(inode,
4567 memset(val + OCFS2_XATTR_SIZE(name_len), 0,
4568 size - OCFS2_XATTR_SIZE(name_len));
4569 if (OCFS2_XATTR_SIZE(xi->value_len) > 0)
4570 memcpy(val + OCFS2_XATTR_SIZE(name_len),
4571 xi->value, xi->value_len);
4573 le16_add_cpu(&xh->xh_name_value_len, new_size);
4574 ocfs2_xattr_set_local(xe, local);
4578 * Remove the old entry if there is more than one.
4579 * We don't remove the last entry so that we can
4580 * use it to indicate the hash value of the empty
4584 le16_add_cpu(&xh->xh_count, -1);
4587 (void *)last - (void *)xe);
4589 sizeof(struct ocfs2_xattr_entry));
4592 cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE);
4597 /* find a new entry for insert. */
4598 int low = 0, high = count - 1, tmp;
4599 struct ocfs2_xattr_entry *tmp_xe;
4601 while (low <= high && count) {
4602 tmp = (low + high) / 2;
4603 tmp_xe = &xh->xh_entries[tmp];
4605 if (name_hash > le32_to_cpu(tmp_xe->xe_name_hash))
4607 else if (name_hash <
4608 le32_to_cpu(tmp_xe->xe_name_hash))
4616 xe = &xh->xh_entries[low];
4618 memmove(xe + 1, xe, (void *)last - (void *)xe);
4620 le16_add_cpu(&xh->xh_count, 1);
4621 memset(xe, 0, sizeof(struct ocfs2_xattr_entry));
4622 xe->xe_name_hash = cpu_to_le32(name_hash);
4623 xe->xe_name_len = name_len;
4624 ocfs2_xattr_set_type(xe, xi->name_index);
4628 /* Insert the new name+value. */
4629 size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(xi->value_len);
4632 * We must make sure that the name/value pair
4633 * exists in the same block.
4635 offs = le16_to_cpu(xh->xh_free_start);
4636 start = offs - size;
4638 if (start >> inode->i_sb->s_blocksize_bits !=
4639 (offs - 1) >> inode->i_sb->s_blocksize_bits) {
4640 offs = offs - offs % blocksize;
4641 xh->xh_free_start = cpu_to_le16(offs);
4644 val = ocfs2_xattr_bucket_get_val(inode, xs->bucket, offs - size);
4645 xe->xe_name_offset = cpu_to_le16(offs - size);
4647 memset(val, 0, size);
4648 memcpy(val, xi->name, name_len);
4649 memcpy(val + OCFS2_XATTR_SIZE(name_len), xi->value, xi->value_len);
4651 xe->xe_value_size = cpu_to_le64(xi->value_len);
4652 ocfs2_xattr_set_local(xe, local);
4654 le16_add_cpu(&xh->xh_free_start, -size);
4655 le16_add_cpu(&xh->xh_name_value_len, size);
4661 * Set the xattr entry in the specified bucket.
4662 * The bucket is indicated by xs->bucket and it should have the enough
4663 * space for the xattr insertion.
4665 static int ocfs2_xattr_set_entry_in_bucket(struct inode *inode,
4667 struct ocfs2_xattr_info *xi,
4668 struct ocfs2_xattr_search *xs,
4675 mlog(0, "Set xattr entry len = %lu index = %d in bucket %llu\n",
4676 (unsigned long)xi->value_len, xi->name_index,
4677 (unsigned long long)bucket_blkno(xs->bucket));
4679 if (!xs->bucket->bu_bhs[1]) {
4680 blkno = bucket_blkno(xs->bucket);
4681 ocfs2_xattr_bucket_relse(xs->bucket);
4682 ret = ocfs2_read_xattr_bucket(xs->bucket, blkno);
4689 ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket,
4690 OCFS2_JOURNAL_ACCESS_WRITE);
4696 ocfs2_xattr_set_entry_normal(inode, xi, xs, name_hash, local);
4697 ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket);
4704 * Truncate the specified xe_off entry in xattr bucket.
4705 * bucket is indicated by header_bh and len is the new length.
4706 * Both the ocfs2_xattr_value_root and the entry will be updated here.
4708 * Copy the new updated xe and xe_value_root to new_xe and new_xv if needed.
4710 static int ocfs2_xattr_bucket_value_truncate(struct inode *inode,
4711 struct ocfs2_xattr_bucket *bucket,
4714 struct ocfs2_xattr_set_ctxt *ctxt)
4718 struct ocfs2_xattr_entry *xe;
4719 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
4720 size_t blocksize = inode->i_sb->s_blocksize;
4721 struct ocfs2_xattr_value_buf vb = {
4722 .vb_access = ocfs2_journal_access,
4725 xe = &xh->xh_entries[xe_off];
4727 BUG_ON(!xe || ocfs2_xattr_is_local(xe));
4729 offset = le16_to_cpu(xe->xe_name_offset) +
4730 OCFS2_XATTR_SIZE(xe->xe_name_len);
4732 value_blk = offset / blocksize;
4734 /* We don't allow ocfs2_xattr_value to be stored in different block. */
4735 BUG_ON(value_blk != (offset + OCFS2_XATTR_ROOT_SIZE - 1) / blocksize);
4737 vb.vb_bh = bucket->bu_bhs[value_blk];
4740 vb.vb_xv = (struct ocfs2_xattr_value_root *)
4741 (vb.vb_bh->b_data + offset % blocksize);
4744 * From here on out we have to dirty the bucket. The generic
4745 * value calls only modify one of the bucket's bhs, but we need
4746 * to send the bucket at once. So if they error, they *could* have
4747 * modified something. We have to assume they did, and dirty
4748 * the whole bucket. This leaves us in a consistent state.
4750 mlog(0, "truncate %u in xattr bucket %llu to %d bytes.\n",
4751 xe_off, (unsigned long long)bucket_blkno(bucket), len);
4752 ret = ocfs2_xattr_value_truncate(inode, &vb, len, ctxt);
4758 ret = ocfs2_xattr_bucket_journal_access(ctxt->handle, bucket,
4759 OCFS2_JOURNAL_ACCESS_WRITE);
4765 xe->xe_value_size = cpu_to_le64(len);
4767 ocfs2_xattr_bucket_journal_dirty(ctxt->handle, bucket);
4773 static int ocfs2_xattr_bucket_value_truncate_xs(struct inode *inode,
4774 struct ocfs2_xattr_search *xs,
4776 struct ocfs2_xattr_set_ctxt *ctxt)
4779 struct ocfs2_xattr_entry *xe = xs->here;
4780 struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *)xs->base;
4782 BUG_ON(!xs->bucket->bu_bhs[0] || !xe || ocfs2_xattr_is_local(xe));
4784 offset = xe - xh->xh_entries;
4785 ret = ocfs2_xattr_bucket_value_truncate(inode, xs->bucket,
4793 static int ocfs2_xattr_bucket_set_value_outside(struct inode *inode,
4795 struct ocfs2_xattr_search *xs,
4799 int ret, offset, block_off;
4800 struct ocfs2_xattr_value_root *xv;
4801 struct ocfs2_xattr_entry *xe = xs->here;
4802 struct ocfs2_xattr_header *xh = bucket_xh(xs->bucket);
4805 BUG_ON(!xs->base || !xe || ocfs2_xattr_is_local(xe));
4807 ret = ocfs2_xattr_bucket_get_name_value(inode, xh,
4808 xe - xh->xh_entries,
4816 base = bucket_block(xs->bucket, block_off);
4817 xv = (struct ocfs2_xattr_value_root *)(base + offset +
4818 OCFS2_XATTR_SIZE(xe->xe_name_len));
4820 ret = __ocfs2_xattr_set_value_outside(inode, handle,
4821 xv, val, value_len);
4828 static int ocfs2_rm_xattr_cluster(struct inode *inode,
4829 struct buffer_head *root_bh,
4835 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
4836 struct inode *tl_inode = osb->osb_tl_inode;
4838 struct ocfs2_xattr_block *xb =
4839 (struct ocfs2_xattr_block *)root_bh->b_data;
4840 struct ocfs2_alloc_context *meta_ac = NULL;
4841 struct ocfs2_cached_dealloc_ctxt dealloc;
4842 struct ocfs2_extent_tree et;
4844 ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh);
4846 ocfs2_init_dealloc_ctxt(&dealloc);
4848 mlog(0, "rm xattr extent rec at %u len = %u, start from %llu\n",
4849 cpos, len, (unsigned long long)blkno);
4851 ocfs2_remove_xattr_clusters_from_cache(INODE_CACHE(inode), blkno,
4854 ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac);
4860 mutex_lock(&tl_inode->i_mutex);
4862 if (ocfs2_truncate_log_needs_flush(osb)) {
4863 ret = __ocfs2_flush_truncate_log(osb);
4870 handle = ocfs2_start_trans(osb, ocfs2_remove_extent_credits(osb->sb));
4871 if (IS_ERR(handle)) {
4877 ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), root_bh,
4878 OCFS2_JOURNAL_ACCESS_WRITE);
4884 ret = ocfs2_remove_extent(handle, &et, cpos, len, meta_ac,
4891 le32_add_cpu(&xb->xb_attrs.xb_root.xt_clusters, -len);
4893 ret = ocfs2_journal_dirty(handle, root_bh);
4899 ret = ocfs2_truncate_log_append(osb, handle, blkno, len);
4904 ocfs2_commit_trans(osb, handle);
4906 ocfs2_schedule_truncate_log_flush(osb, 1);
4908 mutex_unlock(&tl_inode->i_mutex);
4911 ocfs2_free_alloc_context(meta_ac);
4913 ocfs2_run_deallocs(osb, &dealloc);
4918 static void ocfs2_xattr_bucket_remove_xs(struct inode *inode,
4920 struct ocfs2_xattr_search *xs)
4922 struct ocfs2_xattr_header *xh = bucket_xh(xs->bucket);
4923 struct ocfs2_xattr_entry *last = &xh->xh_entries[
4924 le16_to_cpu(xh->xh_count) - 1];
4927 ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket,
4928 OCFS2_JOURNAL_ACCESS_WRITE);
4934 /* Remove the old entry. */
4935 memmove(xs->here, xs->here + 1,
4936 (void *)last - (void *)xs->here);
4937 memset(last, 0, sizeof(struct ocfs2_xattr_entry));
4938 le16_add_cpu(&xh->xh_count, -1);
4940 ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket);
4944 * Set the xattr name/value in the bucket specified in xs.
4946 * As the new value in xi may be stored in the bucket or in an outside cluster,
4947 * we divide the whole process into 3 steps:
4948 * 1. insert name/value in the bucket(ocfs2_xattr_set_entry_in_bucket)
4949 * 2. truncate of the outside cluster(ocfs2_xattr_bucket_value_truncate_xs)
4950 * 3. Set the value to the outside cluster(ocfs2_xattr_bucket_set_value_outside)
4951 * 4. If the clusters for the new outside value can't be allocated, we need
4952 * to free the xattr we allocated in set.
4954 static int ocfs2_xattr_set_in_bucket(struct inode *inode,
4955 struct ocfs2_xattr_info *xi,
4956 struct ocfs2_xattr_search *xs,
4957 struct ocfs2_xattr_set_ctxt *ctxt)
4961 char *val = (char *)xi->value;
4962 struct ocfs2_xattr_entry *xe = xs->here;
4963 u32 name_hash = ocfs2_xattr_name_hash(inode, xi->name,
4966 if (!xs->not_found && !ocfs2_xattr_is_local(xe)) {
4968 * We need to truncate the xattr storage first.
4970 * If both the old and new value are stored to
4971 * outside block, we only need to truncate
4972 * the storage and then set the value outside.
4974 * If the new value should be stored within block,
4975 * we should free all the outside block first and
4976 * the modification to the xattr block will be done
4977 * by following steps.
4979 if (xi->value_len > OCFS2_XATTR_INLINE_SIZE)
4980 value_len = xi->value_len;
4984 ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs,
4991 goto set_value_outside;
4994 value_len = xi->value_len;
4995 /* So we have to handle the inside block change now. */
4996 if (value_len > OCFS2_XATTR_INLINE_SIZE) {
4998 * If the new value will be stored outside of block,
4999 * initalize a new empty value root and insert it first.
5002 xi->value = &def_xv;
5003 xi->value_len = OCFS2_XATTR_ROOT_SIZE;
5006 ret = ocfs2_xattr_set_entry_in_bucket(inode, ctxt->handle, xi, xs,
5013 if (value_len <= OCFS2_XATTR_INLINE_SIZE)
5016 /* allocate the space now for the outside block storage. */
5017 ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs,
5022 if (xs->not_found) {
5024 * We can't allocate enough clusters for outside
5025 * storage and we have allocated xattr already,
5026 * so need to remove it.
5028 ocfs2_xattr_bucket_remove_xs(inode, ctxt->handle, xs);
5034 ret = ocfs2_xattr_bucket_set_value_outside(inode, ctxt->handle,
5035 xs, val, value_len);
5041 * check whether the xattr bucket is filled up with the same hash value.
5042 * If we want to insert the xattr with the same hash, return -ENOSPC.
5043 * If we want to insert a xattr with different hash value, go ahead
5044 * and ocfs2_divide_xattr_bucket will handle this.
5046 static int ocfs2_check_xattr_bucket_collision(struct inode *inode,
5047 struct ocfs2_xattr_bucket *bucket,
5050 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
5051 u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name));
5053 if (name_hash != le32_to_cpu(xh->xh_entries[0].xe_name_hash))
5056 if (xh->xh_entries[le16_to_cpu(xh->xh_count) - 1].xe_name_hash ==
5057 xh->xh_entries[0].xe_name_hash) {
5058 mlog(ML_ERROR, "Too much hash collision in xattr bucket %llu, "
5060 (unsigned long long)bucket_blkno(bucket),
5061 le32_to_cpu(xh->xh_entries[0].xe_name_hash));
5068 static int ocfs2_xattr_set_entry_index_block(struct inode *inode,
5069 struct ocfs2_xattr_info *xi,
5070 struct ocfs2_xattr_search *xs,
5071 struct ocfs2_xattr_set_ctxt *ctxt)
5073 struct ocfs2_xattr_header *xh;
5074 struct ocfs2_xattr_entry *xe;
5075 u16 count, header_size, xh_free_start;
5076 int free, max_free, need, old;
5077 size_t value_size = 0, name_len = strlen(xi->name);
5078 size_t blocksize = inode->i_sb->s_blocksize;
5079 int ret, allocation = 0;
5081 mlog_entry("Set xattr %s in xattr index block\n", xi->name);
5085 count = le16_to_cpu(xh->xh_count);
5086 xh_free_start = le16_to_cpu(xh->xh_free_start);
5087 header_size = sizeof(struct ocfs2_xattr_header) +
5088 count * sizeof(struct ocfs2_xattr_entry);
5089 max_free = OCFS2_XATTR_BUCKET_SIZE - header_size -
5090 le16_to_cpu(xh->xh_name_value_len) - OCFS2_XATTR_HEADER_GAP;
5092 mlog_bug_on_msg(header_size > blocksize, "bucket %llu has header size "
5093 "of %u which exceed block size\n",
5094 (unsigned long long)bucket_blkno(xs->bucket),
5097 if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE)
5098 value_size = OCFS2_XATTR_ROOT_SIZE;
5100 value_size = OCFS2_XATTR_SIZE(xi->value_len);
5103 need = sizeof(struct ocfs2_xattr_entry) +
5104 OCFS2_XATTR_SIZE(name_len) + value_size;
5106 need = value_size + OCFS2_XATTR_SIZE(name_len);
5109 * We only replace the old value if the new length is smaller
5110 * than the old one. Otherwise we will allocate new space in the
5111 * bucket to store it.
5114 if (ocfs2_xattr_is_local(xe))
5115 old = OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size));
5117 old = OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE);
5119 if (old >= value_size)
5123 free = xh_free_start - header_size - OCFS2_XATTR_HEADER_GAP;
5125 * We need to make sure the new name/value pair
5126 * can exist in the same block.
5128 if (xh_free_start % blocksize < need)
5129 free -= xh_free_start % blocksize;
5131 mlog(0, "xs->not_found = %d, in xattr bucket %llu: free = %d, "
5132 "need = %d, max_free = %d, xh_free_start = %u, xh_name_value_len ="
5133 " %u\n", xs->not_found,
5134 (unsigned long long)bucket_blkno(xs->bucket),
5135 free, need, max_free, le16_to_cpu(xh->xh_free_start),
5136 le16_to_cpu(xh->xh_name_value_len));
5140 count == ocfs2_xattr_max_xe_in_bucket(inode->i_sb))) {
5141 if (need <= max_free &&
5142 count < ocfs2_xattr_max_xe_in_bucket(inode->i_sb)) {
5144 * We can create the space by defragment. Since only the
5145 * name/value will be moved, the xe shouldn't be changed
5148 ret = ocfs2_defrag_xattr_bucket(inode, ctxt->handle,
5155 xh_free_start = le16_to_cpu(xh->xh_free_start);
5156 free = xh_free_start - header_size
5157 - OCFS2_XATTR_HEADER_GAP;
5158 if (xh_free_start % blocksize < need)
5159 free -= xh_free_start % blocksize;
5164 mlog(0, "Can't get enough space for xattr insert by "
5165 "defragment. Need %u bytes, but we have %d, so "
5166 "allocate new bucket for it.\n", need, free);
5170 * We have to add new buckets or clusters and one
5171 * allocation should leave us enough space for insert.
5176 * We do not allow for overlapping ranges between buckets. And
5177 * the maximum number of collisions we will allow for then is
5178 * one bucket's worth, so check it here whether we need to
5179 * add a new bucket for the insert.
5181 ret = ocfs2_check_xattr_bucket_collision(inode,
5189 ret = ocfs2_add_new_xattr_bucket(inode,
5199 * ocfs2_add_new_xattr_bucket() will have updated
5200 * xs->bucket if it moved, but it will not have updated
5201 * any of the other search fields. Thus, we drop it and
5202 * re-search. Everything should be cached, so it'll be
5205 ocfs2_xattr_bucket_relse(xs->bucket);
5206 ret = ocfs2_xattr_index_block_find(inode, xs->xattr_bh,
5209 if (ret && ret != -ENODATA)
5211 xs->not_found = ret;
5217 ret = ocfs2_xattr_set_in_bucket(inode, xi, xs, ctxt);
5223 static int ocfs2_delete_xattr_in_bucket(struct inode *inode,
5224 struct ocfs2_xattr_bucket *bucket,
5228 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
5230 struct ocfs2_xattr_entry *xe;
5231 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5232 struct ocfs2_xattr_set_ctxt ctxt = {NULL, NULL,};
5233 int credits = ocfs2_remove_extent_credits(osb->sb) +
5234 ocfs2_blocks_per_xattr_bucket(inode->i_sb);
5237 ocfs2_init_dealloc_ctxt(&ctxt.dealloc);
5239 for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
5240 xe = &xh->xh_entries[i];
5241 if (ocfs2_xattr_is_local(xe))
5244 ctxt.handle = ocfs2_start_trans(osb, credits);
5245 if (IS_ERR(ctxt.handle)) {
5246 ret = PTR_ERR(ctxt.handle);
5251 ret = ocfs2_xattr_bucket_value_truncate(inode, bucket,
5254 ocfs2_commit_trans(osb, ctxt.handle);
5261 ocfs2_schedule_truncate_log_flush(osb, 1);
5262 ocfs2_run_deallocs(osb, &ctxt.dealloc);
5266 static int ocfs2_delete_xattr_index_block(struct inode *inode,
5267 struct buffer_head *xb_bh)
5269 struct ocfs2_xattr_block *xb =
5270 (struct ocfs2_xattr_block *)xb_bh->b_data;
5271 struct ocfs2_extent_list *el = &xb->xb_attrs.xb_root.xt_list;
5273 u32 name_hash = UINT_MAX, e_cpos, num_clusters;
5276 if (le16_to_cpu(el->l_next_free_rec) == 0)
5279 while (name_hash > 0) {
5280 ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno,
5281 &e_cpos, &num_clusters, el);
5287 ret = ocfs2_iterate_xattr_buckets(inode, p_blkno, num_clusters,
5288 ocfs2_delete_xattr_in_bucket,
5295 ret = ocfs2_rm_xattr_cluster(inode, xb_bh,
5296 p_blkno, e_cpos, num_clusters);
5305 name_hash = e_cpos - 1;
5313 * 'security' attributes support
5315 static size_t ocfs2_xattr_security_list(struct inode *inode, char *list,
5316 size_t list_size, const char *name,
5319 const size_t prefix_len = XATTR_SECURITY_PREFIX_LEN;
5320 const size_t total_len = prefix_len + name_len + 1;
5322 if (list && total_len <= list_size) {
5323 memcpy(list, XATTR_SECURITY_PREFIX, prefix_len);
5324 memcpy(list + prefix_len, name, name_len);
5325 list[prefix_len + name_len] = '\0';
5330 static int ocfs2_xattr_security_get(struct inode *inode, const char *name,
5331 void *buffer, size_t size)
5333 if (strcmp(name, "") == 0)
5335 return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_SECURITY, name,
5339 static int ocfs2_xattr_security_set(struct inode *inode, const char *name,
5340 const void *value, size_t size, int flags)
5342 if (strcmp(name, "") == 0)
5345 return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_SECURITY, name, value,
5349 int ocfs2_init_security_get(struct inode *inode,
5351 struct ocfs2_security_xattr_info *si)
5353 /* check whether ocfs2 support feature xattr */
5354 if (!ocfs2_supports_xattr(OCFS2_SB(dir->i_sb)))
5356 return security_inode_init_security(inode, dir, &si->name, &si->value,
5360 int ocfs2_init_security_set(handle_t *handle,
5361 struct inode *inode,
5362 struct buffer_head *di_bh,
5363 struct ocfs2_security_xattr_info *si,
5364 struct ocfs2_alloc_context *xattr_ac,
5365 struct ocfs2_alloc_context *data_ac)
5367 return ocfs2_xattr_set_handle(handle, inode, di_bh,
5368 OCFS2_XATTR_INDEX_SECURITY,
5369 si->name, si->value, si->value_len, 0,
5373 struct xattr_handler ocfs2_xattr_security_handler = {
5374 .prefix = XATTR_SECURITY_PREFIX,
5375 .list = ocfs2_xattr_security_list,
5376 .get = ocfs2_xattr_security_get,
5377 .set = ocfs2_xattr_security_set,
5381 * 'trusted' attributes support
5383 static size_t ocfs2_xattr_trusted_list(struct inode *inode, char *list,
5384 size_t list_size, const char *name,
5387 const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN;
5388 const size_t total_len = prefix_len + name_len + 1;
5390 if (list && total_len <= list_size) {
5391 memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len);
5392 memcpy(list + prefix_len, name, name_len);
5393 list[prefix_len + name_len] = '\0';
5398 static int ocfs2_xattr_trusted_get(struct inode *inode, const char *name,
5399 void *buffer, size_t size)
5401 if (strcmp(name, "") == 0)
5403 return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_TRUSTED, name,
5407 static int ocfs2_xattr_trusted_set(struct inode *inode, const char *name,
5408 const void *value, size_t size, int flags)
5410 if (strcmp(name, "") == 0)
5413 return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_TRUSTED, name, value,
5417 struct xattr_handler ocfs2_xattr_trusted_handler = {
5418 .prefix = XATTR_TRUSTED_PREFIX,
5419 .list = ocfs2_xattr_trusted_list,
5420 .get = ocfs2_xattr_trusted_get,
5421 .set = ocfs2_xattr_trusted_set,
5425 * 'user' attributes support
5427 static size_t ocfs2_xattr_user_list(struct inode *inode, char *list,
5428 size_t list_size, const char *name,
5431 const size_t prefix_len = XATTR_USER_PREFIX_LEN;
5432 const size_t total_len = prefix_len + name_len + 1;
5433 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5435 if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
5438 if (list && total_len <= list_size) {
5439 memcpy(list, XATTR_USER_PREFIX, prefix_len);
5440 memcpy(list + prefix_len, name, name_len);
5441 list[prefix_len + name_len] = '\0';
5446 static int ocfs2_xattr_user_get(struct inode *inode, const char *name,
5447 void *buffer, size_t size)
5449 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5451 if (strcmp(name, "") == 0)
5453 if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
5455 return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_USER, name,
5459 static int ocfs2_xattr_user_set(struct inode *inode, const char *name,
5460 const void *value, size_t size, int flags)
5462 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5464 if (strcmp(name, "") == 0)
5466 if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
5469 return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_USER, name, value,
5473 struct xattr_handler ocfs2_xattr_user_handler = {
5474 .prefix = XATTR_USER_PREFIX,
5475 .list = ocfs2_xattr_user_list,
5476 .get = ocfs2_xattr_user_get,
5477 .set = ocfs2_xattr_user_set,