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_FREE_IN_IBODY (OCFS2_MIN_XATTR_INLINE_SIZE \
86 - sizeof(struct ocfs2_xattr_header) \
88 #define OCFS2_XATTR_FREE_IN_BLOCK(ptr) ((ptr)->i_sb->s_blocksize \
89 - sizeof(struct ocfs2_xattr_block) \
90 - sizeof(struct ocfs2_xattr_header) \
93 static struct ocfs2_xattr_def_value_root def_xv = {
94 .xv.xr_list.l_count = cpu_to_le16(1),
97 struct xattr_handler *ocfs2_xattr_handlers[] = {
98 &ocfs2_xattr_user_handler,
99 #ifdef CONFIG_OCFS2_FS_POSIX_ACL
100 &ocfs2_xattr_acl_access_handler,
101 &ocfs2_xattr_acl_default_handler,
103 &ocfs2_xattr_trusted_handler,
104 &ocfs2_xattr_security_handler,
108 static struct xattr_handler *ocfs2_xattr_handler_map[OCFS2_XATTR_MAX] = {
109 [OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler,
110 #ifdef CONFIG_OCFS2_FS_POSIX_ACL
111 [OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS]
112 = &ocfs2_xattr_acl_access_handler,
113 [OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT]
114 = &ocfs2_xattr_acl_default_handler,
116 [OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler,
117 [OCFS2_XATTR_INDEX_SECURITY] = &ocfs2_xattr_security_handler,
120 struct ocfs2_xattr_info {
127 struct ocfs2_xattr_search {
128 struct buffer_head *inode_bh;
130 * xattr_bh point to the block buffer head which has extended attribute
131 * when extended attribute in inode, xattr_bh is equal to inode_bh.
133 struct buffer_head *xattr_bh;
134 struct ocfs2_xattr_header *header;
135 struct ocfs2_xattr_bucket *bucket;
138 struct ocfs2_xattr_entry *here;
142 static int ocfs2_xattr_bucket_get_name_value(struct inode *inode,
143 struct ocfs2_xattr_header *xh,
148 static int ocfs2_xattr_block_find(struct inode *inode,
151 struct ocfs2_xattr_search *xs);
152 static int ocfs2_xattr_index_block_find(struct inode *inode,
153 struct buffer_head *root_bh,
156 struct ocfs2_xattr_search *xs);
158 static int ocfs2_xattr_tree_list_index_block(struct inode *inode,
159 struct ocfs2_xattr_tree_root *xt,
163 static int ocfs2_xattr_create_index_block(struct inode *inode,
164 struct ocfs2_xattr_search *xs,
165 struct ocfs2_xattr_set_ctxt *ctxt);
167 static int ocfs2_xattr_set_entry_index_block(struct inode *inode,
168 struct ocfs2_xattr_info *xi,
169 struct ocfs2_xattr_search *xs,
170 struct ocfs2_xattr_set_ctxt *ctxt);
172 static int ocfs2_delete_xattr_index_block(struct inode *inode,
173 struct buffer_head *xb_bh);
174 static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle,
175 u64 src_blk, u64 last_blk, u64 to_blk,
176 unsigned int start_bucket,
179 static inline u16 ocfs2_xattr_buckets_per_cluster(struct ocfs2_super *osb)
181 return (1 << osb->s_clustersize_bits) / OCFS2_XATTR_BUCKET_SIZE;
184 static inline u16 ocfs2_blocks_per_xattr_bucket(struct super_block *sb)
186 return OCFS2_XATTR_BUCKET_SIZE / (1 << sb->s_blocksize_bits);
189 static inline u16 ocfs2_xattr_max_xe_in_bucket(struct super_block *sb)
191 u16 len = sb->s_blocksize -
192 offsetof(struct ocfs2_xattr_header, xh_entries);
194 return len / sizeof(struct ocfs2_xattr_entry);
197 #define bucket_blkno(_b) ((_b)->bu_bhs[0]->b_blocknr)
198 #define bucket_block(_b, _n) ((_b)->bu_bhs[(_n)]->b_data)
199 #define bucket_xh(_b) ((struct ocfs2_xattr_header *)bucket_block((_b), 0))
201 static struct ocfs2_xattr_bucket *ocfs2_xattr_bucket_new(struct inode *inode)
203 struct ocfs2_xattr_bucket *bucket;
204 int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
206 BUG_ON(blks > OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET);
208 bucket = kzalloc(sizeof(struct ocfs2_xattr_bucket), GFP_NOFS);
210 bucket->bu_inode = inode;
211 bucket->bu_blocks = blks;
217 static void ocfs2_xattr_bucket_relse(struct ocfs2_xattr_bucket *bucket)
221 for (i = 0; i < bucket->bu_blocks; i++) {
222 brelse(bucket->bu_bhs[i]);
223 bucket->bu_bhs[i] = NULL;
227 static void ocfs2_xattr_bucket_free(struct ocfs2_xattr_bucket *bucket)
230 ocfs2_xattr_bucket_relse(bucket);
231 bucket->bu_inode = NULL;
237 * A bucket that has never been written to disk doesn't need to be
238 * read. We just need the buffer_heads. Don't call this for
239 * buckets that are already on disk. ocfs2_read_xattr_bucket() initializes
242 static int ocfs2_init_xattr_bucket(struct ocfs2_xattr_bucket *bucket,
247 for (i = 0; i < bucket->bu_blocks; i++) {
248 bucket->bu_bhs[i] = sb_getblk(bucket->bu_inode->i_sb,
250 if (!bucket->bu_bhs[i]) {
256 if (!ocfs2_buffer_uptodate(bucket->bu_inode,
258 ocfs2_set_new_buffer_uptodate(bucket->bu_inode,
263 ocfs2_xattr_bucket_relse(bucket);
267 /* Read the xattr bucket at xb_blkno */
268 static int ocfs2_read_xattr_bucket(struct ocfs2_xattr_bucket *bucket,
273 rc = ocfs2_read_blocks(bucket->bu_inode, xb_blkno,
274 bucket->bu_blocks, bucket->bu_bhs, 0,
277 rc = ocfs2_validate_meta_ecc_bhs(bucket->bu_inode->i_sb,
280 &bucket_xh(bucket)->xh_check);
286 ocfs2_xattr_bucket_relse(bucket);
290 static int ocfs2_xattr_bucket_journal_access(handle_t *handle,
291 struct ocfs2_xattr_bucket *bucket,
296 for (i = 0; i < bucket->bu_blocks; i++) {
297 rc = ocfs2_journal_access(handle, bucket->bu_inode,
298 bucket->bu_bhs[i], type);
308 static void ocfs2_xattr_bucket_journal_dirty(handle_t *handle,
309 struct ocfs2_xattr_bucket *bucket)
313 ocfs2_compute_meta_ecc_bhs(bucket->bu_inode->i_sb,
314 bucket->bu_bhs, bucket->bu_blocks,
315 &bucket_xh(bucket)->xh_check);
317 for (i = 0; i < bucket->bu_blocks; i++)
318 ocfs2_journal_dirty(handle, bucket->bu_bhs[i]);
321 static void ocfs2_xattr_bucket_copy_data(struct ocfs2_xattr_bucket *dest,
322 struct ocfs2_xattr_bucket *src)
325 int blocksize = src->bu_inode->i_sb->s_blocksize;
327 BUG_ON(dest->bu_blocks != src->bu_blocks);
328 BUG_ON(dest->bu_inode != src->bu_inode);
330 for (i = 0; i < src->bu_blocks; i++) {
331 memcpy(bucket_block(dest, i), bucket_block(src, i),
336 static int ocfs2_validate_xattr_block(struct super_block *sb,
337 struct buffer_head *bh)
340 struct ocfs2_xattr_block *xb =
341 (struct ocfs2_xattr_block *)bh->b_data;
343 mlog(0, "Validating xattr block %llu\n",
344 (unsigned long long)bh->b_blocknr);
346 BUG_ON(!buffer_uptodate(bh));
349 * If the ecc fails, we return the error but otherwise
350 * leave the filesystem running. We know any error is
351 * local to this block.
353 rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &xb->xb_check);
358 * Errors after here are fatal
361 if (!OCFS2_IS_VALID_XATTR_BLOCK(xb)) {
363 "Extended attribute block #%llu has bad "
365 (unsigned long long)bh->b_blocknr, 7,
370 if (le64_to_cpu(xb->xb_blkno) != bh->b_blocknr) {
372 "Extended attribute block #%llu has an "
373 "invalid xb_blkno of %llu",
374 (unsigned long long)bh->b_blocknr,
375 (unsigned long long)le64_to_cpu(xb->xb_blkno));
379 if (le32_to_cpu(xb->xb_fs_generation) != OCFS2_SB(sb)->fs_generation) {
381 "Extended attribute block #%llu has an invalid "
382 "xb_fs_generation of #%u",
383 (unsigned long long)bh->b_blocknr,
384 le32_to_cpu(xb->xb_fs_generation));
391 static int ocfs2_read_xattr_block(struct inode *inode, u64 xb_blkno,
392 struct buffer_head **bh)
395 struct buffer_head *tmp = *bh;
397 rc = ocfs2_read_block(inode, xb_blkno, &tmp,
398 ocfs2_validate_xattr_block);
400 /* If ocfs2_read_block() got us a new bh, pass it up. */
407 static inline const char *ocfs2_xattr_prefix(int name_index)
409 struct xattr_handler *handler = NULL;
411 if (name_index > 0 && name_index < OCFS2_XATTR_MAX)
412 handler = ocfs2_xattr_handler_map[name_index];
414 return handler ? handler->prefix : NULL;
417 static u32 ocfs2_xattr_name_hash(struct inode *inode,
421 /* Get hash value of uuid from super block */
422 u32 hash = OCFS2_SB(inode->i_sb)->uuid_hash;
425 /* hash extended attribute name */
426 for (i = 0; i < name_len; i++) {
427 hash = (hash << OCFS2_HASH_SHIFT) ^
428 (hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^
436 * ocfs2_xattr_hash_entry()
438 * Compute the hash of an extended attribute.
440 static void ocfs2_xattr_hash_entry(struct inode *inode,
441 struct ocfs2_xattr_header *header,
442 struct ocfs2_xattr_entry *entry)
445 char *name = (char *)header + le16_to_cpu(entry->xe_name_offset);
447 hash = ocfs2_xattr_name_hash(inode, name, entry->xe_name_len);
448 entry->xe_name_hash = cpu_to_le32(hash);
453 static int ocfs2_xattr_entry_real_size(int name_len, size_t value_len)
457 if (value_len <= OCFS2_XATTR_INLINE_SIZE)
458 size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(value_len);
460 size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE;
461 size += sizeof(struct ocfs2_xattr_entry);
466 int ocfs2_calc_security_init(struct inode *dir,
467 struct ocfs2_security_xattr_info *si,
470 struct ocfs2_alloc_context **xattr_ac)
473 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
474 int s_size = ocfs2_xattr_entry_real_size(strlen(si->name),
478 * The max space of security xattr taken inline is
479 * 256(name) + 80(value) + 16(entry) = 352 bytes,
480 * So reserve one metadata block for it is ok.
482 if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE ||
483 s_size > OCFS2_XATTR_FREE_IN_IBODY) {
484 ret = ocfs2_reserve_new_metadata_blocks(osb, 1, xattr_ac);
489 *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS;
492 /* reserve clusters for xattr value which will be set in B tree*/
493 if (si->value_len > OCFS2_XATTR_INLINE_SIZE)
494 *want_clusters += ocfs2_clusters_for_bytes(dir->i_sb,
499 int ocfs2_calc_xattr_init(struct inode *dir,
500 struct buffer_head *dir_bh,
502 struct ocfs2_security_xattr_info *si,
505 struct ocfs2_alloc_context **xattr_ac)
508 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
514 s_size = ocfs2_xattr_entry_real_size(strlen(si->name),
517 if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) {
518 acl_len = ocfs2_xattr_get_nolock(dir, dir_bh,
519 OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT,
522 a_size = ocfs2_xattr_entry_real_size(0, acl_len);
525 } else if (acl_len != 0 && acl_len != -ENODATA) {
531 if (!(s_size + a_size))
535 * The max space of security xattr taken inline is
536 * 256(name) + 80(value) + 16(entry) = 352 bytes,
537 * The max space of acl xattr taken inline is
538 * 80(value) + 16(entry) * 2(if directory) = 192 bytes,
539 * when blocksize = 512, may reserve one more cluser for
540 * xattr bucket, otherwise reserve one metadata block
543 if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE ||
544 (s_size + a_size) > OCFS2_XATTR_FREE_IN_IBODY) {
545 ret = ocfs2_reserve_new_metadata_blocks(osb, 1, xattr_ac);
550 *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS;
553 if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE &&
554 (s_size + a_size) > OCFS2_XATTR_FREE_IN_BLOCK(dir)) {
556 *xattr_credits += ocfs2_blocks_per_xattr_bucket(dir->i_sb);
559 /* reserve clusters for xattr value which will be set in B tree*/
560 if (si->enable && si->value_len > OCFS2_XATTR_INLINE_SIZE)
561 *want_clusters += ocfs2_clusters_for_bytes(dir->i_sb,
563 if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL &&
564 acl_len > OCFS2_XATTR_INLINE_SIZE) {
565 *want_clusters += ocfs2_clusters_for_bytes(dir->i_sb, acl_len);
567 *want_clusters += ocfs2_clusters_for_bytes(dir->i_sb,
574 static int ocfs2_xattr_extend_allocation(struct inode *inode,
576 struct ocfs2_xattr_value_buf *vb,
577 struct ocfs2_xattr_set_ctxt *ctxt)
580 handle_t *handle = ctxt->handle;
581 enum ocfs2_alloc_restarted why;
582 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
583 u32 prev_clusters, logical_start = le32_to_cpu(vb->vb_xv->xr_clusters);
584 struct ocfs2_extent_tree et;
586 mlog(0, "(clusters_to_add for xattr= %u)\n", clusters_to_add);
588 ocfs2_init_xattr_value_extent_tree(&et, inode, vb);
590 status = vb->vb_access(handle, inode, vb->vb_bh,
591 OCFS2_JOURNAL_ACCESS_WRITE);
597 prev_clusters = le32_to_cpu(vb->vb_xv->xr_clusters);
598 status = ocfs2_add_clusters_in_btree(osb,
613 status = ocfs2_journal_dirty(handle, vb->vb_bh);
619 clusters_to_add -= le32_to_cpu(vb->vb_xv->xr_clusters) - prev_clusters;
622 * We should have already allocated enough space before the transaction,
623 * so no need to restart.
625 BUG_ON(why != RESTART_NONE || clusters_to_add);
632 static int __ocfs2_remove_xattr_range(struct inode *inode,
633 struct ocfs2_xattr_value_buf *vb,
634 u32 cpos, u32 phys_cpos, u32 len,
635 struct ocfs2_xattr_set_ctxt *ctxt)
638 u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos);
639 handle_t *handle = ctxt->handle;
640 struct ocfs2_extent_tree et;
642 ocfs2_init_xattr_value_extent_tree(&et, inode, vb);
644 ret = vb->vb_access(handle, inode, vb->vb_bh,
645 OCFS2_JOURNAL_ACCESS_WRITE);
651 ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, ctxt->meta_ac,
658 le32_add_cpu(&vb->vb_xv->xr_clusters, -len);
660 ret = ocfs2_journal_dirty(handle, vb->vb_bh);
666 ret = ocfs2_cache_cluster_dealloc(&ctxt->dealloc, phys_blkno, len);
674 static int ocfs2_xattr_shrink_size(struct inode *inode,
677 struct ocfs2_xattr_value_buf *vb,
678 struct ocfs2_xattr_set_ctxt *ctxt)
681 u32 trunc_len, cpos, phys_cpos, alloc_size;
684 if (old_clusters <= new_clusters)
688 trunc_len = old_clusters - new_clusters;
690 ret = ocfs2_xattr_get_clusters(inode, cpos, &phys_cpos,
692 &vb->vb_xv->xr_list);
698 if (alloc_size > trunc_len)
699 alloc_size = trunc_len;
701 ret = __ocfs2_remove_xattr_range(inode, vb, cpos,
702 phys_cpos, alloc_size,
709 block = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos);
710 ocfs2_remove_xattr_clusters_from_cache(inode, block,
713 trunc_len -= alloc_size;
720 static int ocfs2_xattr_value_truncate(struct inode *inode,
721 struct buffer_head *root_bh,
722 struct ocfs2_xattr_value_root *xv,
724 struct ocfs2_xattr_set_ctxt *ctxt)
727 u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, len);
728 u32 old_clusters = le32_to_cpu(xv->xr_clusters);
729 struct ocfs2_xattr_value_buf vb = {
732 .vb_access = ocfs2_journal_access,
735 if (new_clusters == old_clusters)
738 if (new_clusters > old_clusters)
739 ret = ocfs2_xattr_extend_allocation(inode,
740 new_clusters - old_clusters,
743 ret = ocfs2_xattr_shrink_size(inode,
744 old_clusters, new_clusters,
750 static int ocfs2_xattr_list_entry(char *buffer, size_t size,
751 size_t *result, const char *prefix,
752 const char *name, int name_len)
754 char *p = buffer + *result;
755 int prefix_len = strlen(prefix);
756 int total_len = prefix_len + name_len + 1;
758 *result += total_len;
760 /* we are just looking for how big our buffer needs to be */
767 memcpy(p, prefix, prefix_len);
768 memcpy(p + prefix_len, name, name_len);
769 p[prefix_len + name_len] = '\0';
774 static int ocfs2_xattr_list_entries(struct inode *inode,
775 struct ocfs2_xattr_header *header,
776 char *buffer, size_t buffer_size)
780 const char *prefix, *name;
782 for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) {
783 struct ocfs2_xattr_entry *entry = &header->xh_entries[i];
784 type = ocfs2_xattr_get_type(entry);
785 prefix = ocfs2_xattr_prefix(type);
788 name = (const char *)header +
789 le16_to_cpu(entry->xe_name_offset);
791 ret = ocfs2_xattr_list_entry(buffer, buffer_size,
792 &result, prefix, name,
802 static int ocfs2_xattr_ibody_list(struct inode *inode,
803 struct ocfs2_dinode *di,
807 struct ocfs2_xattr_header *header = NULL;
808 struct ocfs2_inode_info *oi = OCFS2_I(inode);
811 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL))
814 header = (struct ocfs2_xattr_header *)
815 ((void *)di + inode->i_sb->s_blocksize -
816 le16_to_cpu(di->i_xattr_inline_size));
818 ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size);
823 static int ocfs2_xattr_block_list(struct inode *inode,
824 struct ocfs2_dinode *di,
828 struct buffer_head *blk_bh = NULL;
829 struct ocfs2_xattr_block *xb;
832 if (!di->i_xattr_loc)
835 ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc),
842 xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
843 if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) {
844 struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header;
845 ret = ocfs2_xattr_list_entries(inode, header,
846 buffer, buffer_size);
848 struct ocfs2_xattr_tree_root *xt = &xb->xb_attrs.xb_root;
849 ret = ocfs2_xattr_tree_list_index_block(inode, xt,
850 buffer, buffer_size);
858 ssize_t ocfs2_listxattr(struct dentry *dentry,
862 int ret = 0, i_ret = 0, b_ret = 0;
863 struct buffer_head *di_bh = NULL;
864 struct ocfs2_dinode *di = NULL;
865 struct ocfs2_inode_info *oi = OCFS2_I(dentry->d_inode);
867 if (!ocfs2_supports_xattr(OCFS2_SB(dentry->d_sb)))
870 if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL))
873 ret = ocfs2_inode_lock(dentry->d_inode, &di_bh, 0);
879 di = (struct ocfs2_dinode *)di_bh->b_data;
881 down_read(&oi->ip_xattr_sem);
882 i_ret = ocfs2_xattr_ibody_list(dentry->d_inode, di, buffer, size);
890 b_ret = ocfs2_xattr_block_list(dentry->d_inode, di,
895 up_read(&oi->ip_xattr_sem);
896 ocfs2_inode_unlock(dentry->d_inode, 0);
900 return i_ret + b_ret;
903 static int ocfs2_xattr_find_entry(int name_index,
905 struct ocfs2_xattr_search *xs)
907 struct ocfs2_xattr_entry *entry;
914 name_len = strlen(name);
916 for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) {
917 cmp = name_index - ocfs2_xattr_get_type(entry);
919 cmp = name_len - entry->xe_name_len;
921 cmp = memcmp(name, (xs->base +
922 le16_to_cpu(entry->xe_name_offset)),
930 return cmp ? -ENODATA : 0;
933 static int ocfs2_xattr_get_value_outside(struct inode *inode,
934 struct ocfs2_xattr_value_root *xv,
938 u32 cpos, p_cluster, num_clusters, bpc, clusters;
941 size_t cplen, blocksize;
942 struct buffer_head *bh = NULL;
943 struct ocfs2_extent_list *el;
946 clusters = le32_to_cpu(xv->xr_clusters);
947 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1);
948 blocksize = inode->i_sb->s_blocksize;
951 while (cpos < clusters) {
952 ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster,
959 blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster);
960 /* Copy ocfs2_xattr_value */
961 for (i = 0; i < num_clusters * bpc; i++, blkno++) {
962 ret = ocfs2_read_block(inode, blkno, &bh, NULL);
968 cplen = len >= blocksize ? blocksize : len;
969 memcpy(buffer, bh->b_data, cplen);
978 cpos += num_clusters;
984 static int ocfs2_xattr_ibody_get(struct inode *inode,
989 struct ocfs2_xattr_search *xs)
991 struct ocfs2_inode_info *oi = OCFS2_I(inode);
992 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
993 struct ocfs2_xattr_value_root *xv;
997 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL))
1000 xs->end = (void *)di + inode->i_sb->s_blocksize;
1001 xs->header = (struct ocfs2_xattr_header *)
1002 (xs->end - le16_to_cpu(di->i_xattr_inline_size));
1003 xs->base = (void *)xs->header;
1004 xs->here = xs->header->xh_entries;
1006 ret = ocfs2_xattr_find_entry(name_index, name, xs);
1009 size = le64_to_cpu(xs->here->xe_value_size);
1011 if (size > buffer_size)
1013 if (ocfs2_xattr_is_local(xs->here)) {
1014 memcpy(buffer, (void *)xs->base +
1015 le16_to_cpu(xs->here->xe_name_offset) +
1016 OCFS2_XATTR_SIZE(xs->here->xe_name_len), size);
1018 xv = (struct ocfs2_xattr_value_root *)
1019 (xs->base + le16_to_cpu(
1020 xs->here->xe_name_offset) +
1021 OCFS2_XATTR_SIZE(xs->here->xe_name_len));
1022 ret = ocfs2_xattr_get_value_outside(inode, xv,
1034 static int ocfs2_xattr_block_get(struct inode *inode,
1039 struct ocfs2_xattr_search *xs)
1041 struct ocfs2_xattr_block *xb;
1042 struct ocfs2_xattr_value_root *xv;
1044 int ret = -ENODATA, name_offset, name_len, block_off, i;
1046 xs->bucket = ocfs2_xattr_bucket_new(inode);
1053 ret = ocfs2_xattr_block_find(inode, name_index, name, xs);
1059 if (xs->not_found) {
1064 xb = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data;
1065 size = le64_to_cpu(xs->here->xe_value_size);
1068 if (size > buffer_size)
1071 name_offset = le16_to_cpu(xs->here->xe_name_offset);
1072 name_len = OCFS2_XATTR_SIZE(xs->here->xe_name_len);
1073 i = xs->here - xs->header->xh_entries;
1075 if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) {
1076 ret = ocfs2_xattr_bucket_get_name_value(inode,
1077 bucket_xh(xs->bucket),
1081 xs->base = bucket_block(xs->bucket, block_off);
1083 if (ocfs2_xattr_is_local(xs->here)) {
1084 memcpy(buffer, (void *)xs->base +
1085 name_offset + name_len, size);
1087 xv = (struct ocfs2_xattr_value_root *)
1088 (xs->base + name_offset + name_len);
1089 ret = ocfs2_xattr_get_value_outside(inode, xv,
1099 ocfs2_xattr_bucket_free(xs->bucket);
1101 brelse(xs->xattr_bh);
1102 xs->xattr_bh = NULL;
1106 int ocfs2_xattr_get_nolock(struct inode *inode,
1107 struct buffer_head *di_bh,
1114 struct ocfs2_dinode *di = NULL;
1115 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1116 struct ocfs2_xattr_search xis = {
1117 .not_found = -ENODATA,
1119 struct ocfs2_xattr_search xbs = {
1120 .not_found = -ENODATA,
1123 if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb)))
1126 if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL))
1129 xis.inode_bh = xbs.inode_bh = di_bh;
1130 di = (struct ocfs2_dinode *)di_bh->b_data;
1132 down_read(&oi->ip_xattr_sem);
1133 ret = ocfs2_xattr_ibody_get(inode, name_index, name, buffer,
1135 if (ret == -ENODATA && di->i_xattr_loc)
1136 ret = ocfs2_xattr_block_get(inode, name_index, name, buffer,
1138 up_read(&oi->ip_xattr_sem);
1143 /* ocfs2_xattr_get()
1145 * Copy an extended attribute into the buffer provided.
1146 * Buffer is NULL to compute the size of buffer required.
1148 static int ocfs2_xattr_get(struct inode *inode,
1155 struct buffer_head *di_bh = NULL;
1157 ret = ocfs2_inode_lock(inode, &di_bh, 0);
1162 ret = ocfs2_xattr_get_nolock(inode, di_bh, name_index,
1163 name, buffer, buffer_size);
1165 ocfs2_inode_unlock(inode, 0);
1172 static int __ocfs2_xattr_set_value_outside(struct inode *inode,
1174 struct ocfs2_xattr_value_root *xv,
1178 int ret = 0, i, cp_len, credits;
1179 u16 blocksize = inode->i_sb->s_blocksize;
1180 u32 p_cluster, num_clusters;
1181 u32 cpos = 0, bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1);
1182 u32 clusters = ocfs2_clusters_for_bytes(inode->i_sb, value_len);
1184 struct buffer_head *bh = NULL;
1186 BUG_ON(clusters > le32_to_cpu(xv->xr_clusters));
1189 * In __ocfs2_xattr_set_value_outside has already been dirtied,
1190 * so we don't need to worry about whether ocfs2_extend_trans
1191 * will create a new transactio for us or not.
1193 credits = clusters * bpc;
1194 ret = ocfs2_extend_trans(handle, credits);
1200 while (cpos < clusters) {
1201 ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster,
1202 &num_clusters, &xv->xr_list);
1208 blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster);
1210 for (i = 0; i < num_clusters * bpc; i++, blkno++) {
1211 ret = ocfs2_read_block(inode, blkno, &bh, NULL);
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,
1264 size_t name_len = strlen(xi->name);
1265 void *val = xs->base + offs;
1266 size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE;
1268 ret = ocfs2_journal_access(handle, inode, xs->xattr_bh,
1269 OCFS2_JOURNAL_ACCESS_WRITE);
1274 /* Decrease xattr count */
1275 le16_add_cpu(&xs->header->xh_count, -1);
1276 /* Remove the xattr entry and tree root which has already be set*/
1277 memset((void *)xs->here, 0, sizeof(struct ocfs2_xattr_entry));
1278 memset(val, 0, size);
1280 ret = ocfs2_journal_dirty(handle, xs->xattr_bh);
1287 static int ocfs2_xattr_update_entry(struct inode *inode,
1289 struct ocfs2_xattr_info *xi,
1290 struct ocfs2_xattr_search *xs,
1295 ret = ocfs2_journal_access(handle, inode, xs->xattr_bh,
1296 OCFS2_JOURNAL_ACCESS_WRITE);
1302 xs->here->xe_name_offset = cpu_to_le16(offs);
1303 xs->here->xe_value_size = cpu_to_le64(xi->value_len);
1304 if (xi->value_len <= OCFS2_XATTR_INLINE_SIZE)
1305 ocfs2_xattr_set_local(xs->here, 1);
1307 ocfs2_xattr_set_local(xs->here, 0);
1308 ocfs2_xattr_hash_entry(inode, xs->header, xs->here);
1310 ret = ocfs2_journal_dirty(handle, xs->xattr_bh);
1318 * ocfs2_xattr_set_value_outside()
1320 * Set large size value in B tree.
1322 static int ocfs2_xattr_set_value_outside(struct inode *inode,
1323 struct ocfs2_xattr_info *xi,
1324 struct ocfs2_xattr_search *xs,
1325 struct ocfs2_xattr_set_ctxt *ctxt,
1328 size_t name_len = strlen(xi->name);
1329 void *val = xs->base + offs;
1330 struct ocfs2_xattr_value_root *xv = NULL;
1331 size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE;
1334 memset(val, 0, size);
1335 memcpy(val, xi->name, name_len);
1336 xv = (struct ocfs2_xattr_value_root *)
1337 (val + OCFS2_XATTR_SIZE(name_len));
1338 xv->xr_clusters = 0;
1339 xv->xr_last_eb_blk = 0;
1340 xv->xr_list.l_tree_depth = 0;
1341 xv->xr_list.l_count = cpu_to_le16(1);
1342 xv->xr_list.l_next_free_rec = 0;
1344 ret = ocfs2_xattr_value_truncate(inode, xs->xattr_bh, xv,
1345 xi->value_len, ctxt);
1350 ret = ocfs2_xattr_update_entry(inode, ctxt->handle, xi, xs, offs);
1355 ret = __ocfs2_xattr_set_value_outside(inode, ctxt->handle, xv,
1356 xi->value, xi->value_len);
1364 * ocfs2_xattr_set_entry_local()
1366 * Set, replace or remove extended attribute in local.
1368 static void ocfs2_xattr_set_entry_local(struct inode *inode,
1369 struct ocfs2_xattr_info *xi,
1370 struct ocfs2_xattr_search *xs,
1371 struct ocfs2_xattr_entry *last,
1374 size_t name_len = strlen(xi->name);
1377 if (xi->value && xs->not_found) {
1378 /* Insert the new xattr entry. */
1379 le16_add_cpu(&xs->header->xh_count, 1);
1380 ocfs2_xattr_set_type(last, xi->name_index);
1381 ocfs2_xattr_set_local(last, 1);
1382 last->xe_name_len = name_len;
1388 first_val = xs->base + min_offs;
1389 offs = le16_to_cpu(xs->here->xe_name_offset);
1390 val = xs->base + offs;
1392 if (le64_to_cpu(xs->here->xe_value_size) >
1393 OCFS2_XATTR_INLINE_SIZE)
1394 size = OCFS2_XATTR_SIZE(name_len) +
1395 OCFS2_XATTR_ROOT_SIZE;
1397 size = OCFS2_XATTR_SIZE(name_len) +
1398 OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size));
1400 if (xi->value && size == OCFS2_XATTR_SIZE(name_len) +
1401 OCFS2_XATTR_SIZE(xi->value_len)) {
1402 /* The old and the new value have the
1403 same size. Just replace the value. */
1404 ocfs2_xattr_set_local(xs->here, 1);
1405 xs->here->xe_value_size = cpu_to_le64(xi->value_len);
1406 /* Clear value bytes. */
1407 memset(val + OCFS2_XATTR_SIZE(name_len),
1409 OCFS2_XATTR_SIZE(xi->value_len));
1410 memcpy(val + OCFS2_XATTR_SIZE(name_len),
1415 /* Remove the old name+value. */
1416 memmove(first_val + size, first_val, val - first_val);
1417 memset(first_val, 0, size);
1418 xs->here->xe_name_hash = 0;
1419 xs->here->xe_name_offset = 0;
1420 ocfs2_xattr_set_local(xs->here, 1);
1421 xs->here->xe_value_size = 0;
1425 /* Adjust all value offsets. */
1426 last = xs->header->xh_entries;
1427 for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) {
1428 size_t o = le16_to_cpu(last->xe_name_offset);
1431 last->xe_name_offset = cpu_to_le16(o + size);
1436 /* Remove the old entry. */
1438 memmove(xs->here, xs->here + 1,
1439 (void *)last - (void *)xs->here);
1440 memset(last, 0, sizeof(struct ocfs2_xattr_entry));
1441 le16_add_cpu(&xs->header->xh_count, -1);
1445 /* Insert the new name+value. */
1446 size_t size = OCFS2_XATTR_SIZE(name_len) +
1447 OCFS2_XATTR_SIZE(xi->value_len);
1448 void *val = xs->base + min_offs - size;
1450 xs->here->xe_name_offset = cpu_to_le16(min_offs - size);
1451 memset(val, 0, size);
1452 memcpy(val, xi->name, name_len);
1453 memcpy(val + OCFS2_XATTR_SIZE(name_len),
1456 xs->here->xe_value_size = cpu_to_le64(xi->value_len);
1457 ocfs2_xattr_set_local(xs->here, 1);
1458 ocfs2_xattr_hash_entry(inode, xs->header, xs->here);
1465 * ocfs2_xattr_set_entry()
1467 * Set extended attribute entry into inode or block.
1469 * If extended attribute value size > OCFS2_XATTR_INLINE_SIZE,
1470 * We first insert tree root(ocfs2_xattr_value_root) with set_entry_local(),
1471 * then set value in B tree with set_value_outside().
1473 static int ocfs2_xattr_set_entry(struct inode *inode,
1474 struct ocfs2_xattr_info *xi,
1475 struct ocfs2_xattr_search *xs,
1476 struct ocfs2_xattr_set_ctxt *ctxt,
1479 struct ocfs2_xattr_entry *last;
1480 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1481 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
1482 size_t min_offs = xs->end - xs->base, name_len = strlen(xi->name);
1484 handle_t *handle = ctxt->handle;
1486 struct ocfs2_xattr_info xi_l = {
1487 .name_index = xi->name_index,
1490 .value_len = xi->value_len,
1493 /* Compute min_offs, last and free space. */
1494 last = xs->header->xh_entries;
1496 for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) {
1497 size_t offs = le16_to_cpu(last->xe_name_offset);
1498 if (offs < min_offs)
1503 free = min_offs - ((void *)last - xs->base) - sizeof(__u32);
1507 if (!xs->not_found) {
1509 if (ocfs2_xattr_is_local(xs->here))
1510 size = OCFS2_XATTR_SIZE(name_len) +
1511 OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size));
1513 size = OCFS2_XATTR_SIZE(name_len) +
1514 OCFS2_XATTR_ROOT_SIZE;
1515 free += (size + sizeof(struct ocfs2_xattr_entry));
1517 /* Check free space in inode or block */
1518 if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
1519 if (free < sizeof(struct ocfs2_xattr_entry) +
1520 OCFS2_XATTR_SIZE(name_len) +
1521 OCFS2_XATTR_ROOT_SIZE) {
1525 size_l = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE;
1526 xi_l.value = (void *)&def_xv;
1527 xi_l.value_len = OCFS2_XATTR_ROOT_SIZE;
1528 } else if (xi->value) {
1529 if (free < sizeof(struct ocfs2_xattr_entry) +
1530 OCFS2_XATTR_SIZE(name_len) +
1531 OCFS2_XATTR_SIZE(xi->value_len)) {
1537 if (!xs->not_found) {
1538 /* For existing extended attribute */
1539 size_t size = OCFS2_XATTR_SIZE(name_len) +
1540 OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size));
1541 size_t offs = le16_to_cpu(xs->here->xe_name_offset);
1542 void *val = xs->base + offs;
1544 if (ocfs2_xattr_is_local(xs->here) && size == size_l) {
1545 /* Replace existing local xattr with tree root */
1546 ret = ocfs2_xattr_set_value_outside(inode, xi, xs,
1551 } else if (!ocfs2_xattr_is_local(xs->here)) {
1552 /* For existing xattr which has value outside */
1553 struct ocfs2_xattr_value_root *xv = NULL;
1554 xv = (struct ocfs2_xattr_value_root *)(val +
1555 OCFS2_XATTR_SIZE(name_len));
1557 if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
1559 * If new value need set outside also,
1560 * first truncate old value to new value,
1561 * then set new value with set_value_outside().
1563 ret = ocfs2_xattr_value_truncate(inode,
1573 ret = ocfs2_xattr_update_entry(inode,
1583 ret = __ocfs2_xattr_set_value_outside(inode,
1593 * If new value need set in local,
1594 * just trucate old value to zero.
1596 ret = ocfs2_xattr_value_truncate(inode,
1607 ret = ocfs2_journal_access(handle, inode, xs->inode_bh,
1608 OCFS2_JOURNAL_ACCESS_WRITE);
1614 if (!(flag & OCFS2_INLINE_XATTR_FL)) {
1615 ret = ocfs2_journal_access(handle, inode, xs->xattr_bh,
1616 OCFS2_JOURNAL_ACCESS_WRITE);
1624 * Set value in local, include set tree root in local.
1625 * This is the first step for value size >INLINE_SIZE.
1627 ocfs2_xattr_set_entry_local(inode, &xi_l, xs, last, min_offs);
1629 if (!(flag & OCFS2_INLINE_XATTR_FL)) {
1630 ret = ocfs2_journal_dirty(handle, xs->xattr_bh);
1637 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) &&
1638 (flag & OCFS2_INLINE_XATTR_FL)) {
1639 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1640 unsigned int xattrsize = osb->s_xattr_inline_size;
1643 * Adjust extent record count or inline data size
1644 * to reserve space for extended attribute.
1646 if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
1647 struct ocfs2_inline_data *idata = &di->id2.i_data;
1648 le16_add_cpu(&idata->id_count, -xattrsize);
1649 } else if (!(ocfs2_inode_is_fast_symlink(inode))) {
1650 struct ocfs2_extent_list *el = &di->id2.i_list;
1651 le16_add_cpu(&el->l_count, -(xattrsize /
1652 sizeof(struct ocfs2_extent_rec)));
1654 di->i_xattr_inline_size = cpu_to_le16(xattrsize);
1656 /* Update xattr flag */
1657 spin_lock(&oi->ip_lock);
1658 oi->ip_dyn_features |= flag;
1659 di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features);
1660 spin_unlock(&oi->ip_lock);
1661 /* Update inode ctime */
1662 inode->i_ctime = CURRENT_TIME;
1663 di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
1664 di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
1666 ret = ocfs2_journal_dirty(handle, xs->inode_bh);
1670 if (!ret && xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
1672 * Set value outside in B tree.
1673 * This is the second step for value size > INLINE_SIZE.
1675 size_t offs = le16_to_cpu(xs->here->xe_name_offset);
1676 ret = ocfs2_xattr_set_value_outside(inode, xi, xs, ctxt, offs);
1682 * If set value outside failed, we have to clean
1683 * the junk tree root we have already set in local.
1685 ret2 = ocfs2_xattr_cleanup(inode, ctxt->handle,
1695 static int ocfs2_remove_value_outside(struct inode*inode,
1696 struct buffer_head *bh,
1697 struct ocfs2_xattr_header *header)
1700 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1701 struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, };
1703 ocfs2_init_dealloc_ctxt(&ctxt.dealloc);
1705 ctxt.handle = ocfs2_start_trans(osb,
1706 ocfs2_remove_extent_credits(osb->sb));
1707 if (IS_ERR(ctxt.handle)) {
1708 ret = PTR_ERR(ctxt.handle);
1713 for (i = 0; i < le16_to_cpu(header->xh_count); i++) {
1714 struct ocfs2_xattr_entry *entry = &header->xh_entries[i];
1716 if (!ocfs2_xattr_is_local(entry)) {
1717 struct ocfs2_xattr_value_root *xv;
1720 val = (void *)header +
1721 le16_to_cpu(entry->xe_name_offset);
1722 xv = (struct ocfs2_xattr_value_root *)
1723 (val + OCFS2_XATTR_SIZE(entry->xe_name_len));
1724 ret = ocfs2_xattr_value_truncate(inode, bh, xv,
1733 ocfs2_commit_trans(osb, ctxt.handle);
1734 ocfs2_schedule_truncate_log_flush(osb, 1);
1735 ocfs2_run_deallocs(osb, &ctxt.dealloc);
1740 static int ocfs2_xattr_ibody_remove(struct inode *inode,
1741 struct buffer_head *di_bh)
1744 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
1745 struct ocfs2_xattr_header *header;
1748 header = (struct ocfs2_xattr_header *)
1749 ((void *)di + inode->i_sb->s_blocksize -
1750 le16_to_cpu(di->i_xattr_inline_size));
1752 ret = ocfs2_remove_value_outside(inode, di_bh, header);
1757 static int ocfs2_xattr_block_remove(struct inode *inode,
1758 struct buffer_head *blk_bh)
1760 struct ocfs2_xattr_block *xb;
1763 xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
1764 if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) {
1765 struct ocfs2_xattr_header *header = &(xb->xb_attrs.xb_header);
1766 ret = ocfs2_remove_value_outside(inode, blk_bh, header);
1768 ret = ocfs2_delete_xattr_index_block(inode, blk_bh);
1773 static int ocfs2_xattr_free_block(struct inode *inode,
1776 struct inode *xb_alloc_inode;
1777 struct buffer_head *xb_alloc_bh = NULL;
1778 struct buffer_head *blk_bh = NULL;
1779 struct ocfs2_xattr_block *xb;
1780 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1786 ret = ocfs2_read_xattr_block(inode, block, &blk_bh);
1792 ret = ocfs2_xattr_block_remove(inode, blk_bh);
1798 xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
1799 blk = le64_to_cpu(xb->xb_blkno);
1800 bit = le16_to_cpu(xb->xb_suballoc_bit);
1801 bg_blkno = ocfs2_which_suballoc_group(blk, bit);
1803 xb_alloc_inode = ocfs2_get_system_file_inode(osb,
1804 EXTENT_ALLOC_SYSTEM_INODE,
1805 le16_to_cpu(xb->xb_suballoc_slot));
1806 if (!xb_alloc_inode) {
1811 mutex_lock(&xb_alloc_inode->i_mutex);
1813 ret = ocfs2_inode_lock(xb_alloc_inode, &xb_alloc_bh, 1);
1819 handle = ocfs2_start_trans(osb, OCFS2_SUBALLOC_FREE);
1820 if (IS_ERR(handle)) {
1821 ret = PTR_ERR(handle);
1826 ret = ocfs2_free_suballoc_bits(handle, xb_alloc_inode, xb_alloc_bh,
1831 ocfs2_commit_trans(osb, handle);
1833 ocfs2_inode_unlock(xb_alloc_inode, 1);
1834 brelse(xb_alloc_bh);
1836 mutex_unlock(&xb_alloc_inode->i_mutex);
1837 iput(xb_alloc_inode);
1844 * ocfs2_xattr_remove()
1846 * Free extended attribute resources associated with this inode.
1848 int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh)
1850 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1851 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
1855 if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb)))
1858 if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL))
1861 if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) {
1862 ret = ocfs2_xattr_ibody_remove(inode, di_bh);
1869 if (di->i_xattr_loc) {
1870 ret = ocfs2_xattr_free_block(inode,
1871 le64_to_cpu(di->i_xattr_loc));
1878 handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)),
1879 OCFS2_INODE_UPDATE_CREDITS);
1880 if (IS_ERR(handle)) {
1881 ret = PTR_ERR(handle);
1885 ret = ocfs2_journal_access(handle, inode, di_bh,
1886 OCFS2_JOURNAL_ACCESS_WRITE);
1892 di->i_xattr_loc = 0;
1894 spin_lock(&oi->ip_lock);
1895 oi->ip_dyn_features &= ~(OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL);
1896 di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features);
1897 spin_unlock(&oi->ip_lock);
1899 ret = ocfs2_journal_dirty(handle, di_bh);
1903 ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
1908 static int ocfs2_xattr_has_space_inline(struct inode *inode,
1909 struct ocfs2_dinode *di)
1911 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1912 unsigned int xattrsize = OCFS2_SB(inode->i_sb)->s_xattr_inline_size;
1915 if (xattrsize < OCFS2_MIN_XATTR_INLINE_SIZE)
1918 if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
1919 struct ocfs2_inline_data *idata = &di->id2.i_data;
1920 free = le16_to_cpu(idata->id_count) - le64_to_cpu(di->i_size);
1921 } else if (ocfs2_inode_is_fast_symlink(inode)) {
1922 free = ocfs2_fast_symlink_chars(inode->i_sb) -
1923 le64_to_cpu(di->i_size);
1925 struct ocfs2_extent_list *el = &di->id2.i_list;
1926 free = (le16_to_cpu(el->l_count) -
1927 le16_to_cpu(el->l_next_free_rec)) *
1928 sizeof(struct ocfs2_extent_rec);
1930 if (free >= xattrsize)
1937 * ocfs2_xattr_ibody_find()
1939 * Find extended attribute in inode block and
1940 * fill search info into struct ocfs2_xattr_search.
1942 static int ocfs2_xattr_ibody_find(struct inode *inode,
1945 struct ocfs2_xattr_search *xs)
1947 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1948 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
1952 if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE)
1955 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) {
1956 down_read(&oi->ip_alloc_sem);
1957 has_space = ocfs2_xattr_has_space_inline(inode, di);
1958 up_read(&oi->ip_alloc_sem);
1963 xs->xattr_bh = xs->inode_bh;
1964 xs->end = (void *)di + inode->i_sb->s_blocksize;
1965 if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)
1966 xs->header = (struct ocfs2_xattr_header *)
1967 (xs->end - le16_to_cpu(di->i_xattr_inline_size));
1969 xs->header = (struct ocfs2_xattr_header *)
1970 (xs->end - OCFS2_SB(inode->i_sb)->s_xattr_inline_size);
1971 xs->base = (void *)xs->header;
1972 xs->here = xs->header->xh_entries;
1974 /* Find the named attribute. */
1975 if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) {
1976 ret = ocfs2_xattr_find_entry(name_index, name, xs);
1977 if (ret && ret != -ENODATA)
1979 xs->not_found = ret;
1986 * ocfs2_xattr_ibody_set()
1988 * Set, replace or remove an extended attribute into inode block.
1991 static int ocfs2_xattr_ibody_set(struct inode *inode,
1992 struct ocfs2_xattr_info *xi,
1993 struct ocfs2_xattr_search *xs,
1994 struct ocfs2_xattr_set_ctxt *ctxt)
1996 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1997 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
2000 if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE)
2003 down_write(&oi->ip_alloc_sem);
2004 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) {
2005 if (!ocfs2_xattr_has_space_inline(inode, di)) {
2011 ret = ocfs2_xattr_set_entry(inode, xi, xs, ctxt,
2012 (OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL));
2014 up_write(&oi->ip_alloc_sem);
2020 * ocfs2_xattr_block_find()
2022 * Find extended attribute in external block and
2023 * fill search info into struct ocfs2_xattr_search.
2025 static int ocfs2_xattr_block_find(struct inode *inode,
2028 struct ocfs2_xattr_search *xs)
2030 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
2031 struct buffer_head *blk_bh = NULL;
2032 struct ocfs2_xattr_block *xb;
2035 if (!di->i_xattr_loc)
2038 ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc),
2045 xs->xattr_bh = blk_bh;
2046 xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
2048 if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) {
2049 xs->header = &xb->xb_attrs.xb_header;
2050 xs->base = (void *)xs->header;
2051 xs->end = (void *)(blk_bh->b_data) + blk_bh->b_size;
2052 xs->here = xs->header->xh_entries;
2054 ret = ocfs2_xattr_find_entry(name_index, name, xs);
2056 ret = ocfs2_xattr_index_block_find(inode, blk_bh,
2060 if (ret && ret != -ENODATA) {
2061 xs->xattr_bh = NULL;
2064 xs->not_found = ret;
2073 * ocfs2_xattr_block_set()
2075 * Set, replace or remove an extended attribute into external block.
2078 static int ocfs2_xattr_block_set(struct inode *inode,
2079 struct ocfs2_xattr_info *xi,
2080 struct ocfs2_xattr_search *xs,
2081 struct ocfs2_xattr_set_ctxt *ctxt)
2083 struct buffer_head *new_bh = NULL;
2084 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
2085 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
2086 handle_t *handle = ctxt->handle;
2087 struct ocfs2_xattr_block *xblk = NULL;
2088 u16 suballoc_bit_start;
2093 if (!xs->xattr_bh) {
2094 ret = ocfs2_journal_access(handle, inode, xs->inode_bh,
2095 OCFS2_JOURNAL_ACCESS_CREATE);
2101 ret = ocfs2_claim_metadata(osb, handle, ctxt->meta_ac, 1,
2102 &suballoc_bit_start, &num_got,
2109 new_bh = sb_getblk(inode->i_sb, first_blkno);
2110 ocfs2_set_new_buffer_uptodate(inode, new_bh);
2112 ret = ocfs2_journal_access(handle, inode, new_bh,
2113 OCFS2_JOURNAL_ACCESS_CREATE);
2119 /* Initialize ocfs2_xattr_block */
2120 xs->xattr_bh = new_bh;
2121 xblk = (struct ocfs2_xattr_block *)new_bh->b_data;
2122 memset(xblk, 0, inode->i_sb->s_blocksize);
2123 strcpy((void *)xblk, OCFS2_XATTR_BLOCK_SIGNATURE);
2124 xblk->xb_suballoc_slot = cpu_to_le16(osb->slot_num);
2125 xblk->xb_suballoc_bit = cpu_to_le16(suballoc_bit_start);
2126 xblk->xb_fs_generation = cpu_to_le32(osb->fs_generation);
2127 xblk->xb_blkno = cpu_to_le64(first_blkno);
2129 xs->header = &xblk->xb_attrs.xb_header;
2130 xs->base = (void *)xs->header;
2131 xs->end = (void *)xblk + inode->i_sb->s_blocksize;
2132 xs->here = xs->header->xh_entries;
2134 ret = ocfs2_journal_dirty(handle, new_bh);
2139 di->i_xattr_loc = cpu_to_le64(first_blkno);
2140 ocfs2_journal_dirty(handle, xs->inode_bh);
2142 xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data;
2144 if (!(le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED)) {
2145 /* Set extended attribute into external block */
2146 ret = ocfs2_xattr_set_entry(inode, xi, xs, ctxt,
2147 OCFS2_HAS_XATTR_FL);
2148 if (!ret || ret != -ENOSPC)
2151 ret = ocfs2_xattr_create_index_block(inode, xs, ctxt);
2156 ret = ocfs2_xattr_set_entry_index_block(inode, xi, xs, ctxt);
2163 /* Check whether the new xattr can be inserted into the inode. */
2164 static int ocfs2_xattr_can_be_in_inode(struct inode *inode,
2165 struct ocfs2_xattr_info *xi,
2166 struct ocfs2_xattr_search *xs)
2169 struct ocfs2_xattr_entry *last;
2171 size_t min_offs = xs->end - xs->base;
2176 last = xs->header->xh_entries;
2178 for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) {
2179 size_t offs = le16_to_cpu(last->xe_name_offset);
2180 if (offs < min_offs)
2185 free = min_offs - ((void *)last - xs->base) - sizeof(__u32);
2189 BUG_ON(!xs->not_found);
2191 if (xi->value_len > OCFS2_XATTR_INLINE_SIZE)
2192 value_size = OCFS2_XATTR_ROOT_SIZE;
2194 value_size = OCFS2_XATTR_SIZE(xi->value_len);
2196 if (free >= sizeof(struct ocfs2_xattr_entry) +
2197 OCFS2_XATTR_SIZE(strlen(xi->name)) + value_size)
2203 static int ocfs2_calc_xattr_set_need(struct inode *inode,
2204 struct ocfs2_dinode *di,
2205 struct ocfs2_xattr_info *xi,
2206 struct ocfs2_xattr_search *xis,
2207 struct ocfs2_xattr_search *xbs,
2212 int ret = 0, old_in_xb = 0;
2213 int clusters_add = 0, meta_add = 0, credits = 0;
2214 struct buffer_head *bh = NULL;
2215 struct ocfs2_xattr_block *xb = NULL;
2216 struct ocfs2_xattr_entry *xe = NULL;
2217 struct ocfs2_xattr_value_root *xv = NULL;
2219 int name_offset, name_len = 0;
2220 u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb,
2224 if (xis->not_found && xbs->not_found) {
2225 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
2227 if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
2228 clusters_add += new_clusters;
2229 credits += ocfs2_calc_extend_credits(inode->i_sb,
2237 if (!xis->not_found) {
2239 name_offset = le16_to_cpu(xe->xe_name_offset);
2240 name_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
2242 credits += OCFS2_INODE_UPDATE_CREDITS;
2244 int i, block_off = 0;
2245 xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data;
2247 name_offset = le16_to_cpu(xe->xe_name_offset);
2248 name_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
2249 i = xbs->here - xbs->header->xh_entries;
2252 if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) {
2253 ret = ocfs2_xattr_bucket_get_name_value(inode,
2254 bucket_xh(xbs->bucket),
2257 base = bucket_block(xbs->bucket, block_off);
2258 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
2261 credits += OCFS2_XATTR_BLOCK_UPDATE_CREDITS;
2266 * delete a xattr doesn't need metadata and cluster allocation.
2267 * so just calculate the credits and return.
2269 * The credits for removing the value tree will be extended
2270 * by ocfs2_remove_extent itself.
2273 if (!ocfs2_xattr_is_local(xe))
2274 credits += ocfs2_remove_extent_credits(inode->i_sb);
2279 /* do cluster allocation guess first. */
2280 value_size = le64_to_cpu(xe->xe_value_size);
2284 * In xattr set, we always try to set the xe in inode first,
2285 * so if it can be inserted into inode successfully, the old
2286 * one will be removed from the xattr block, and this xattr
2287 * will be inserted into inode as a new xattr in inode.
2289 if (ocfs2_xattr_can_be_in_inode(inode, xi, xis)) {
2290 clusters_add += new_clusters;
2291 credits += ocfs2_remove_extent_credits(inode->i_sb) +
2292 OCFS2_INODE_UPDATE_CREDITS;
2293 if (!ocfs2_xattr_is_local(xe))
2294 credits += ocfs2_calc_extend_credits(
2302 if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
2303 /* the new values will be stored outside. */
2304 u32 old_clusters = 0;
2306 if (!ocfs2_xattr_is_local(xe)) {
2307 old_clusters = ocfs2_clusters_for_bytes(inode->i_sb,
2309 xv = (struct ocfs2_xattr_value_root *)
2310 (base + name_offset + name_len);
2311 value_size = OCFS2_XATTR_ROOT_SIZE;
2315 if (old_clusters >= new_clusters) {
2316 credits += ocfs2_remove_extent_credits(inode->i_sb);
2319 meta_add += ocfs2_extend_meta_needed(&xv->xr_list);
2320 clusters_add += new_clusters - old_clusters;
2321 credits += ocfs2_calc_extend_credits(inode->i_sb,
2325 if (value_size >= OCFS2_XATTR_ROOT_SIZE)
2330 * Now the new value will be stored inside. So if the new
2331 * value is smaller than the size of value root or the old
2332 * value, we don't need any allocation, otherwise we have
2333 * to guess metadata allocation.
2335 if ((ocfs2_xattr_is_local(xe) && value_size >= xi->value_len) ||
2336 (!ocfs2_xattr_is_local(xe) &&
2337 OCFS2_XATTR_ROOT_SIZE >= xi->value_len))
2342 /* calculate metadata allocation. */
2343 if (di->i_xattr_loc) {
2344 if (!xbs->xattr_bh) {
2345 ret = ocfs2_read_xattr_block(inode,
2346 le64_to_cpu(di->i_xattr_loc),
2353 xb = (struct ocfs2_xattr_block *)bh->b_data;
2355 xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data;
2357 if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) {
2358 struct ocfs2_extent_list *el =
2359 &xb->xb_attrs.xb_root.xt_list;
2360 meta_add += ocfs2_extend_meta_needed(el);
2361 credits += ocfs2_calc_extend_credits(inode->i_sb,
2366 * This cluster will be used either for new bucket or for
2368 * If the cluster size is the same as the bucket size, one
2369 * more is needed since we may need to extend the bucket
2373 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
2374 if (OCFS2_XATTR_BUCKET_SIZE ==
2375 OCFS2_SB(inode->i_sb)->s_clustersize) {
2376 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
2381 credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS;
2385 *clusters_need = clusters_add;
2387 *meta_need = meta_add;
2389 *credits_need = credits;
2394 static int ocfs2_init_xattr_set_ctxt(struct inode *inode,
2395 struct ocfs2_dinode *di,
2396 struct ocfs2_xattr_info *xi,
2397 struct ocfs2_xattr_search *xis,
2398 struct ocfs2_xattr_search *xbs,
2399 struct ocfs2_xattr_set_ctxt *ctxt,
2402 int clusters_add, meta_add, ret;
2403 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
2405 memset(ctxt, 0, sizeof(struct ocfs2_xattr_set_ctxt));
2407 ocfs2_init_dealloc_ctxt(&ctxt->dealloc);
2409 ret = ocfs2_calc_xattr_set_need(inode, di, xi, xis, xbs,
2410 &clusters_add, &meta_add, credits);
2416 mlog(0, "Set xattr %s, reserve meta blocks = %d, clusters = %d, "
2417 "credits = %d\n", xi->name, meta_add, clusters_add, *credits);
2420 ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add,
2429 ret = ocfs2_reserve_clusters(osb, clusters_add, &ctxt->data_ac);
2435 if (ctxt->meta_ac) {
2436 ocfs2_free_alloc_context(ctxt->meta_ac);
2437 ctxt->meta_ac = NULL;
2441 * We cannot have an error and a non null ctxt->data_ac.
2448 static int __ocfs2_xattr_set_handle(struct inode *inode,
2449 struct ocfs2_dinode *di,
2450 struct ocfs2_xattr_info *xi,
2451 struct ocfs2_xattr_search *xis,
2452 struct ocfs2_xattr_search *xbs,
2453 struct ocfs2_xattr_set_ctxt *ctxt)
2455 int ret = 0, credits, old_found;
2458 /* Remove existing extended attribute */
2459 if (!xis->not_found)
2460 ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt);
2461 else if (!xbs->not_found)
2462 ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt);
2464 /* We always try to set extended attribute into inode first*/
2465 ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt);
2466 if (!ret && !xbs->not_found) {
2468 * If succeed and that extended attribute existing in
2469 * external block, then we will remove it.
2474 old_found = xis->not_found;
2475 xis->not_found = -ENODATA;
2476 ret = ocfs2_calc_xattr_set_need(inode,
2484 xis->not_found = old_found;
2490 ret = ocfs2_extend_trans(ctxt->handle, credits +
2491 ctxt->handle->h_buffer_credits);
2496 ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt);
2497 } else if (ret == -ENOSPC) {
2498 if (di->i_xattr_loc && !xbs->xattr_bh) {
2499 ret = ocfs2_xattr_block_find(inode,
2505 old_found = xis->not_found;
2506 xis->not_found = -ENODATA;
2507 ret = ocfs2_calc_xattr_set_need(inode,
2515 xis->not_found = old_found;
2521 ret = ocfs2_extend_trans(ctxt->handle, credits +
2522 ctxt->handle->h_buffer_credits);
2529 * If no space in inode, we will set extended attribute
2530 * into external block.
2532 ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt);
2535 if (!xis->not_found) {
2537 * If succeed and that extended attribute
2538 * existing in inode, we will remove it.
2542 xbs->not_found = -ENODATA;
2543 ret = ocfs2_calc_xattr_set_need(inode,
2556 ret = ocfs2_extend_trans(ctxt->handle, credits +
2557 ctxt->handle->h_buffer_credits);
2562 ret = ocfs2_xattr_ibody_set(inode, xi,
2573 * This function only called duing creating inode
2574 * for init security/acl xattrs of the new inode.
2575 * The xattrs could be put into ibody or extent block,
2576 * xattr bucket would not be use in this case.
2577 * transanction credits also be reserved in here.
2579 int ocfs2_xattr_set_handle(handle_t *handle,
2580 struct inode *inode,
2581 struct buffer_head *di_bh,
2587 struct ocfs2_alloc_context *meta_ac,
2588 struct ocfs2_alloc_context *data_ac)
2590 struct ocfs2_dinode *di;
2593 struct ocfs2_xattr_info xi = {
2594 .name_index = name_index,
2597 .value_len = value_len,
2600 struct ocfs2_xattr_search xis = {
2601 .not_found = -ENODATA,
2604 struct ocfs2_xattr_search xbs = {
2605 .not_found = -ENODATA,
2608 struct ocfs2_xattr_set_ctxt ctxt = {
2614 if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb)))
2617 xis.inode_bh = xbs.inode_bh = di_bh;
2618 di = (struct ocfs2_dinode *)di_bh->b_data;
2620 down_write(&OCFS2_I(inode)->ip_xattr_sem);
2622 ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis);
2625 if (xis.not_found) {
2626 ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs);
2631 ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt);
2634 up_write(&OCFS2_I(inode)->ip_xattr_sem);
2635 brelse(xbs.xattr_bh);
2643 * Set, replace or remove an extended attribute for this inode.
2644 * value is NULL to remove an existing extended attribute, else either
2645 * create or replace an extended attribute.
2647 int ocfs2_xattr_set(struct inode *inode,
2654 struct buffer_head *di_bh = NULL;
2655 struct ocfs2_dinode *di;
2657 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
2658 struct inode *tl_inode = osb->osb_tl_inode;
2659 struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, };
2661 struct ocfs2_xattr_info xi = {
2662 .name_index = name_index,
2665 .value_len = value_len,
2668 struct ocfs2_xattr_search xis = {
2669 .not_found = -ENODATA,
2672 struct ocfs2_xattr_search xbs = {
2673 .not_found = -ENODATA,
2676 if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb)))
2680 * Only xbs will be used on indexed trees. xis doesn't need a
2683 xbs.bucket = ocfs2_xattr_bucket_new(inode);
2685 mlog_errno(-ENOMEM);
2689 ret = ocfs2_inode_lock(inode, &di_bh, 1);
2692 goto cleanup_nolock;
2694 xis.inode_bh = xbs.inode_bh = di_bh;
2695 di = (struct ocfs2_dinode *)di_bh->b_data;
2697 down_write(&OCFS2_I(inode)->ip_xattr_sem);
2699 * Scan inode and external block to find the same name
2700 * extended attribute and collect search infomation.
2702 ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis);
2705 if (xis.not_found) {
2706 ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs);
2711 if (xis.not_found && xbs.not_found) {
2713 if (flags & XATTR_REPLACE)
2720 if (flags & XATTR_CREATE)
2725 mutex_lock(&tl_inode->i_mutex);
2727 if (ocfs2_truncate_log_needs_flush(osb)) {
2728 ret = __ocfs2_flush_truncate_log(osb);
2730 mutex_unlock(&tl_inode->i_mutex);
2735 mutex_unlock(&tl_inode->i_mutex);
2737 ret = ocfs2_init_xattr_set_ctxt(inode, di, &xi, &xis,
2738 &xbs, &ctxt, &credits);
2744 ctxt.handle = ocfs2_start_trans(osb, credits);
2745 if (IS_ERR(ctxt.handle)) {
2746 ret = PTR_ERR(ctxt.handle);
2751 ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt);
2753 ocfs2_commit_trans(osb, ctxt.handle);
2756 ocfs2_free_alloc_context(ctxt.data_ac);
2758 ocfs2_free_alloc_context(ctxt.meta_ac);
2759 if (ocfs2_dealloc_has_cluster(&ctxt.dealloc))
2760 ocfs2_schedule_truncate_log_flush(osb, 1);
2761 ocfs2_run_deallocs(osb, &ctxt.dealloc);
2763 up_write(&OCFS2_I(inode)->ip_xattr_sem);
2764 ocfs2_inode_unlock(inode, 1);
2767 brelse(xbs.xattr_bh);
2768 ocfs2_xattr_bucket_free(xbs.bucket);
2774 * Find the xattr extent rec which may contains name_hash.
2775 * e_cpos will be the first name hash of the xattr rec.
2776 * el must be the ocfs2_xattr_header.xb_attrs.xb_root.xt_list.
2778 static int ocfs2_xattr_get_rec(struct inode *inode,
2783 struct ocfs2_extent_list *el)
2786 struct buffer_head *eb_bh = NULL;
2787 struct ocfs2_extent_block *eb;
2788 struct ocfs2_extent_rec *rec = NULL;
2791 if (el->l_tree_depth) {
2792 ret = ocfs2_find_leaf(inode, el, name_hash, &eb_bh);
2798 eb = (struct ocfs2_extent_block *) eb_bh->b_data;
2801 if (el->l_tree_depth) {
2802 ocfs2_error(inode->i_sb,
2803 "Inode %lu has non zero tree depth in "
2804 "xattr tree block %llu\n", inode->i_ino,
2805 (unsigned long long)eb_bh->b_blocknr);
2811 for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) {
2812 rec = &el->l_recs[i];
2814 if (le32_to_cpu(rec->e_cpos) <= name_hash) {
2815 e_blkno = le64_to_cpu(rec->e_blkno);
2821 ocfs2_error(inode->i_sb, "Inode %lu has bad extent "
2822 "record (%u, %u, 0) in xattr", inode->i_ino,
2823 le32_to_cpu(rec->e_cpos),
2824 ocfs2_rec_clusters(el, rec));
2829 *p_blkno = le64_to_cpu(rec->e_blkno);
2830 *num_clusters = le16_to_cpu(rec->e_leaf_clusters);
2832 *e_cpos = le32_to_cpu(rec->e_cpos);
2838 typedef int (xattr_bucket_func)(struct inode *inode,
2839 struct ocfs2_xattr_bucket *bucket,
2842 static int ocfs2_find_xe_in_bucket(struct inode *inode,
2843 struct ocfs2_xattr_bucket *bucket,
2850 int i, ret = 0, cmp = 1, block_off, new_offset;
2851 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
2852 size_t name_len = strlen(name);
2853 struct ocfs2_xattr_entry *xe = NULL;
2857 * We don't use binary search in the bucket because there
2858 * may be multiple entries with the same name hash.
2860 for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
2861 xe = &xh->xh_entries[i];
2863 if (name_hash > le32_to_cpu(xe->xe_name_hash))
2865 else if (name_hash < le32_to_cpu(xe->xe_name_hash))
2868 cmp = name_index - ocfs2_xattr_get_type(xe);
2870 cmp = name_len - xe->xe_name_len;
2874 ret = ocfs2_xattr_bucket_get_name_value(inode,
2885 xe_name = bucket_block(bucket, block_off) + new_offset;
2886 if (!memcmp(name, xe_name, name_len)) {
2898 * Find the specified xattr entry in a series of buckets.
2899 * This series start from p_blkno and last for num_clusters.
2900 * The ocfs2_xattr_header.xh_num_buckets of the first bucket contains
2901 * the num of the valid buckets.
2903 * Return the buffer_head this xattr should reside in. And if the xattr's
2904 * hash is in the gap of 2 buckets, return the lower bucket.
2906 static int ocfs2_xattr_bucket_find(struct inode *inode,
2913 struct ocfs2_xattr_search *xs)
2916 struct ocfs2_xattr_header *xh = NULL;
2917 struct ocfs2_xattr_entry *xe = NULL;
2919 u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
2920 int low_bucket = 0, bucket, high_bucket;
2921 struct ocfs2_xattr_bucket *search;
2923 u64 blkno, lower_blkno = 0;
2925 search = ocfs2_xattr_bucket_new(inode);
2932 ret = ocfs2_read_xattr_bucket(search, p_blkno);
2938 xh = bucket_xh(search);
2939 high_bucket = le16_to_cpu(xh->xh_num_buckets) - 1;
2940 while (low_bucket <= high_bucket) {
2941 ocfs2_xattr_bucket_relse(search);
2943 bucket = (low_bucket + high_bucket) / 2;
2944 blkno = p_blkno + bucket * blk_per_bucket;
2945 ret = ocfs2_read_xattr_bucket(search, blkno);
2951 xh = bucket_xh(search);
2952 xe = &xh->xh_entries[0];
2953 if (name_hash < le32_to_cpu(xe->xe_name_hash)) {
2954 high_bucket = bucket - 1;
2959 * Check whether the hash of the last entry in our
2960 * bucket is larger than the search one. for an empty
2961 * bucket, the last one is also the first one.
2964 xe = &xh->xh_entries[le16_to_cpu(xh->xh_count) - 1];
2966 last_hash = le32_to_cpu(xe->xe_name_hash);
2968 /* record lower_blkno which may be the insert place. */
2969 lower_blkno = blkno;
2971 if (name_hash > le32_to_cpu(xe->xe_name_hash)) {
2972 low_bucket = bucket + 1;
2976 /* the searched xattr should reside in this bucket if exists. */
2977 ret = ocfs2_find_xe_in_bucket(inode, search,
2978 name_index, name, name_hash,
2988 * Record the bucket we have found.
2989 * When the xattr's hash value is in the gap of 2 buckets, we will
2990 * always set it to the previous bucket.
2993 lower_blkno = p_blkno;
2995 /* This should be in cache - we just read it during the search */
2996 ret = ocfs2_read_xattr_bucket(xs->bucket, lower_blkno);
3002 xs->header = bucket_xh(xs->bucket);
3003 xs->base = bucket_block(xs->bucket, 0);
3004 xs->end = xs->base + inode->i_sb->s_blocksize;
3007 xs->here = &xs->header->xh_entries[index];
3008 mlog(0, "find xattr %s in bucket %llu, entry = %u\n", name,
3009 (unsigned long long)bucket_blkno(xs->bucket), index);
3014 ocfs2_xattr_bucket_free(search);
3018 static int ocfs2_xattr_index_block_find(struct inode *inode,
3019 struct buffer_head *root_bh,
3022 struct ocfs2_xattr_search *xs)
3025 struct ocfs2_xattr_block *xb =
3026 (struct ocfs2_xattr_block *)root_bh->b_data;
3027 struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root;
3028 struct ocfs2_extent_list *el = &xb_root->xt_list;
3030 u32 first_hash, num_clusters = 0;
3031 u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name));
3033 if (le16_to_cpu(el->l_next_free_rec) == 0)
3036 mlog(0, "find xattr %s, hash = %u, index = %d in xattr tree\n",
3037 name, name_hash, name_index);
3039 ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &first_hash,
3046 BUG_ON(p_blkno == 0 || num_clusters == 0 || first_hash > name_hash);
3048 mlog(0, "find xattr extent rec %u clusters from %llu, the first hash "
3049 "in the rec is %u\n", num_clusters, (unsigned long long)p_blkno,
3052 ret = ocfs2_xattr_bucket_find(inode, name_index, name, name_hash,
3053 p_blkno, first_hash, num_clusters, xs);
3059 static int ocfs2_iterate_xattr_buckets(struct inode *inode,
3062 xattr_bucket_func *func,
3066 u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb));
3067 u32 num_buckets = clusters * bpc;
3068 struct ocfs2_xattr_bucket *bucket;
3070 bucket = ocfs2_xattr_bucket_new(inode);
3072 mlog_errno(-ENOMEM);
3076 mlog(0, "iterating xattr buckets in %u clusters starting from %llu\n",
3077 clusters, (unsigned long long)blkno);
3079 for (i = 0; i < num_buckets; i++, blkno += bucket->bu_blocks) {
3080 ret = ocfs2_read_xattr_bucket(bucket, blkno);
3087 * The real bucket num in this series of blocks is stored
3088 * in the 1st bucket.
3091 num_buckets = le16_to_cpu(bucket_xh(bucket)->xh_num_buckets);
3093 mlog(0, "iterating xattr bucket %llu, first hash %u\n",
3094 (unsigned long long)blkno,
3095 le32_to_cpu(bucket_xh(bucket)->xh_entries[0].xe_name_hash));
3097 ret = func(inode, bucket, para);
3100 /* Fall through to bucket_relse() */
3103 ocfs2_xattr_bucket_relse(bucket);
3108 ocfs2_xattr_bucket_free(bucket);
3112 struct ocfs2_xattr_tree_list {
3118 static int ocfs2_xattr_bucket_get_name_value(struct inode *inode,
3119 struct ocfs2_xattr_header *xh,
3126 if (index < 0 || index >= le16_to_cpu(xh->xh_count))
3129 name_offset = le16_to_cpu(xh->xh_entries[index].xe_name_offset);
3131 *block_off = name_offset >> inode->i_sb->s_blocksize_bits;
3132 *new_offset = name_offset % inode->i_sb->s_blocksize;
3137 static int ocfs2_list_xattr_bucket(struct inode *inode,
3138 struct ocfs2_xattr_bucket *bucket,
3142 struct ocfs2_xattr_tree_list *xl = (struct ocfs2_xattr_tree_list *)para;
3143 int i, block_off, new_offset;
3144 const char *prefix, *name;
3146 for (i = 0 ; i < le16_to_cpu(bucket_xh(bucket)->xh_count); i++) {
3147 struct ocfs2_xattr_entry *entry = &bucket_xh(bucket)->xh_entries[i];
3148 type = ocfs2_xattr_get_type(entry);
3149 prefix = ocfs2_xattr_prefix(type);
3152 ret = ocfs2_xattr_bucket_get_name_value(inode,
3160 name = (const char *)bucket_block(bucket, block_off) +
3162 ret = ocfs2_xattr_list_entry(xl->buffer,
3166 entry->xe_name_len);
3175 static int ocfs2_xattr_tree_list_index_block(struct inode *inode,
3176 struct ocfs2_xattr_tree_root *xt,
3180 struct ocfs2_extent_list *el = &xt->xt_list;
3182 u32 name_hash = UINT_MAX, e_cpos = 0, num_clusters = 0;
3184 struct ocfs2_xattr_tree_list xl = {
3186 .buffer_size = buffer_size,
3190 if (le16_to_cpu(el->l_next_free_rec) == 0)
3193 while (name_hash > 0) {
3194 ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno,
3195 &e_cpos, &num_clusters, el);
3201 ret = ocfs2_iterate_xattr_buckets(inode, p_blkno, num_clusters,
3202 ocfs2_list_xattr_bucket,
3212 name_hash = e_cpos - 1;
3220 static int cmp_xe(const void *a, const void *b)
3222 const struct ocfs2_xattr_entry *l = a, *r = b;
3223 u32 l_hash = le32_to_cpu(l->xe_name_hash);
3224 u32 r_hash = le32_to_cpu(r->xe_name_hash);
3226 if (l_hash > r_hash)
3228 if (l_hash < r_hash)
3233 static void swap_xe(void *a, void *b, int size)
3235 struct ocfs2_xattr_entry *l = a, *r = b, tmp;
3238 memcpy(l, r, sizeof(struct ocfs2_xattr_entry));
3239 memcpy(r, &tmp, sizeof(struct ocfs2_xattr_entry));
3243 * When the ocfs2_xattr_block is filled up, new bucket will be created
3244 * and all the xattr entries will be moved to the new bucket.
3245 * The header goes at the start of the bucket, and the names+values are
3246 * filled from the end. This is why *target starts as the last buffer.
3247 * Note: we need to sort the entries since they are not saved in order
3248 * in the ocfs2_xattr_block.
3250 static void ocfs2_cp_xattr_block_to_bucket(struct inode *inode,
3251 struct buffer_head *xb_bh,
3252 struct ocfs2_xattr_bucket *bucket)
3254 int i, blocksize = inode->i_sb->s_blocksize;
3255 int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
3256 u16 offset, size, off_change;
3257 struct ocfs2_xattr_entry *xe;
3258 struct ocfs2_xattr_block *xb =
3259 (struct ocfs2_xattr_block *)xb_bh->b_data;
3260 struct ocfs2_xattr_header *xb_xh = &xb->xb_attrs.xb_header;
3261 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
3262 u16 count = le16_to_cpu(xb_xh->xh_count);
3263 char *src = xb_bh->b_data;
3264 char *target = bucket_block(bucket, blks - 1);
3266 mlog(0, "cp xattr from block %llu to bucket %llu\n",
3267 (unsigned long long)xb_bh->b_blocknr,
3268 (unsigned long long)bucket_blkno(bucket));
3270 for (i = 0; i < blks; i++)
3271 memset(bucket_block(bucket, i), 0, blocksize);
3274 * Since the xe_name_offset is based on ocfs2_xattr_header,
3275 * there is a offset change corresponding to the change of
3276 * ocfs2_xattr_header's position.
3278 off_change = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header);
3279 xe = &xb_xh->xh_entries[count - 1];
3280 offset = le16_to_cpu(xe->xe_name_offset) + off_change;
3281 size = blocksize - offset;
3283 /* copy all the names and values. */
3284 memcpy(target + offset, src + offset, size);
3286 /* Init new header now. */
3287 xh->xh_count = xb_xh->xh_count;
3288 xh->xh_num_buckets = cpu_to_le16(1);
3289 xh->xh_name_value_len = cpu_to_le16(size);
3290 xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE - size);
3292 /* copy all the entries. */
3293 target = bucket_block(bucket, 0);
3294 offset = offsetof(struct ocfs2_xattr_header, xh_entries);
3295 size = count * sizeof(struct ocfs2_xattr_entry);
3296 memcpy(target + offset, (char *)xb_xh + offset, size);
3298 /* Change the xe offset for all the xe because of the move. */
3299 off_change = OCFS2_XATTR_BUCKET_SIZE - blocksize +
3300 offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header);
3301 for (i = 0; i < count; i++)
3302 le16_add_cpu(&xh->xh_entries[i].xe_name_offset, off_change);
3304 mlog(0, "copy entry: start = %u, size = %u, offset_change = %u\n",
3305 offset, size, off_change);
3307 sort(target + offset, count, sizeof(struct ocfs2_xattr_entry),
3312 * After we move xattr from block to index btree, we have to
3313 * update ocfs2_xattr_search to the new xe and base.
3315 * When the entry is in xattr block, xattr_bh indicates the storage place.
3316 * While if the entry is in index b-tree, "bucket" indicates the
3317 * real place of the xattr.
3319 static void ocfs2_xattr_update_xattr_search(struct inode *inode,
3320 struct ocfs2_xattr_search *xs,
3321 struct buffer_head *old_bh)
3323 char *buf = old_bh->b_data;
3324 struct ocfs2_xattr_block *old_xb = (struct ocfs2_xattr_block *)buf;
3325 struct ocfs2_xattr_header *old_xh = &old_xb->xb_attrs.xb_header;
3328 xs->header = bucket_xh(xs->bucket);
3329 xs->base = bucket_block(xs->bucket, 0);
3330 xs->end = xs->base + inode->i_sb->s_blocksize;
3335 i = xs->here - old_xh->xh_entries;
3336 xs->here = &xs->header->xh_entries[i];
3339 static int ocfs2_xattr_create_index_block(struct inode *inode,
3340 struct ocfs2_xattr_search *xs,
3341 struct ocfs2_xattr_set_ctxt *ctxt)
3346 handle_t *handle = ctxt->handle;
3347 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
3348 struct ocfs2_inode_info *oi = OCFS2_I(inode);
3349 struct buffer_head *xb_bh = xs->xattr_bh;
3350 struct ocfs2_xattr_block *xb =
3351 (struct ocfs2_xattr_block *)xb_bh->b_data;
3352 struct ocfs2_xattr_tree_root *xr;
3353 u16 xb_flags = le16_to_cpu(xb->xb_flags);
3355 mlog(0, "create xattr index block for %llu\n",
3356 (unsigned long long)xb_bh->b_blocknr);
3358 BUG_ON(xb_flags & OCFS2_XATTR_INDEXED);
3359 BUG_ON(!xs->bucket);
3363 * We can use this lock for now, and maybe move to a dedicated mutex
3364 * if performance becomes a problem later.
3366 down_write(&oi->ip_alloc_sem);
3368 ret = ocfs2_journal_access(handle, inode, xb_bh,
3369 OCFS2_JOURNAL_ACCESS_WRITE);
3375 ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac,
3376 1, 1, &bit_off, &len);
3383 * The bucket may spread in many blocks, and
3384 * we will only touch the 1st block and the last block
3385 * in the whole bucket(one for entry and one for data).
3387 blkno = ocfs2_clusters_to_blocks(inode->i_sb, bit_off);
3389 mlog(0, "allocate 1 cluster from %llu to xattr block\n",
3390 (unsigned long long)blkno);
3392 ret = ocfs2_init_xattr_bucket(xs->bucket, blkno);
3398 ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket,
3399 OCFS2_JOURNAL_ACCESS_CREATE);
3405 ocfs2_cp_xattr_block_to_bucket(inode, xb_bh, xs->bucket);
3406 ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket);
3408 ocfs2_xattr_update_xattr_search(inode, xs, xb_bh);
3410 /* Change from ocfs2_xattr_header to ocfs2_xattr_tree_root */
3411 memset(&xb->xb_attrs, 0, inode->i_sb->s_blocksize -
3412 offsetof(struct ocfs2_xattr_block, xb_attrs));
3414 xr = &xb->xb_attrs.xb_root;
3415 xr->xt_clusters = cpu_to_le32(1);
3416 xr->xt_last_eb_blk = 0;
3417 xr->xt_list.l_tree_depth = 0;
3418 xr->xt_list.l_count = cpu_to_le16(ocfs2_xattr_recs_per_xb(inode->i_sb));
3419 xr->xt_list.l_next_free_rec = cpu_to_le16(1);
3421 xr->xt_list.l_recs[0].e_cpos = 0;
3422 xr->xt_list.l_recs[0].e_blkno = cpu_to_le64(blkno);
3423 xr->xt_list.l_recs[0].e_leaf_clusters = cpu_to_le16(1);
3425 xb->xb_flags = cpu_to_le16(xb_flags | OCFS2_XATTR_INDEXED);
3427 ocfs2_journal_dirty(handle, xb_bh);
3430 up_write(&oi->ip_alloc_sem);
3435 static int cmp_xe_offset(const void *a, const void *b)
3437 const struct ocfs2_xattr_entry *l = a, *r = b;
3438 u32 l_name_offset = le16_to_cpu(l->xe_name_offset);
3439 u32 r_name_offset = le16_to_cpu(r->xe_name_offset);
3441 if (l_name_offset < r_name_offset)
3443 if (l_name_offset > r_name_offset)
3449 * defrag a xattr bucket if we find that the bucket has some
3450 * holes beteen name/value pairs.
3451 * We will move all the name/value pairs to the end of the bucket
3452 * so that we can spare some space for insertion.
3454 static int ocfs2_defrag_xattr_bucket(struct inode *inode,
3456 struct ocfs2_xattr_bucket *bucket)
3459 size_t end, offset, len, value_len;
3460 struct ocfs2_xattr_header *xh;
3461 char *entries, *buf, *bucket_buf = NULL;
3462 u64 blkno = bucket_blkno(bucket);
3464 size_t blocksize = inode->i_sb->s_blocksize;
3465 struct ocfs2_xattr_entry *xe;
3468 * In order to make the operation more efficient and generic,
3469 * we copy all the blocks into a contiguous memory and do the
3470 * defragment there, so if anything is error, we will not touch
3473 bucket_buf = kmalloc(OCFS2_XATTR_BUCKET_SIZE, GFP_NOFS);
3480 for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize)
3481 memcpy(buf, bucket_block(bucket, i), blocksize);
3483 ret = ocfs2_xattr_bucket_journal_access(handle, bucket,
3484 OCFS2_JOURNAL_ACCESS_WRITE);
3490 xh = (struct ocfs2_xattr_header *)bucket_buf;
3491 entries = (char *)xh->xh_entries;
3492 xh_free_start = le16_to_cpu(xh->xh_free_start);
3494 mlog(0, "adjust xattr bucket in %llu, count = %u, "
3495 "xh_free_start = %u, xh_name_value_len = %u.\n",
3496 (unsigned long long)blkno, le16_to_cpu(xh->xh_count),
3497 xh_free_start, le16_to_cpu(xh->xh_name_value_len));
3500 * sort all the entries by their offset.
3501 * the largest will be the first, so that we can
3502 * move them to the end one by one.
3504 sort(entries, le16_to_cpu(xh->xh_count),
3505 sizeof(struct ocfs2_xattr_entry),
3506 cmp_xe_offset, swap_xe);
3508 /* Move all name/values to the end of the bucket. */
3509 xe = xh->xh_entries;
3510 end = OCFS2_XATTR_BUCKET_SIZE;
3511 for (i = 0; i < le16_to_cpu(xh->xh_count); i++, xe++) {
3512 offset = le16_to_cpu(xe->xe_name_offset);
3513 if (ocfs2_xattr_is_local(xe))
3514 value_len = OCFS2_XATTR_SIZE(
3515 le64_to_cpu(xe->xe_value_size));
3517 value_len = OCFS2_XATTR_ROOT_SIZE;
3518 len = OCFS2_XATTR_SIZE(xe->xe_name_len) + value_len;
3521 * We must make sure that the name/value pair
3522 * exist in the same block. So adjust end to
3523 * the previous block end if needed.
3525 if (((end - len) / blocksize !=
3526 (end - 1) / blocksize))
3527 end = end - end % blocksize;
3529 if (end > offset + len) {
3530 memmove(bucket_buf + end - len,
3531 bucket_buf + offset, len);
3532 xe->xe_name_offset = cpu_to_le16(end - len);
3535 mlog_bug_on_msg(end < offset + len, "Defrag check failed for "
3536 "bucket %llu\n", (unsigned long long)blkno);
3541 mlog_bug_on_msg(xh_free_start > end, "Defrag check failed for "
3542 "bucket %llu\n", (unsigned long long)blkno);
3544 if (xh_free_start == end)
3547 memset(bucket_buf + xh_free_start, 0, end - xh_free_start);
3548 xh->xh_free_start = cpu_to_le16(end);
3550 /* sort the entries by their name_hash. */
3551 sort(entries, le16_to_cpu(xh->xh_count),
3552 sizeof(struct ocfs2_xattr_entry),
3556 for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize)
3557 memcpy(bucket_block(bucket, i), buf, blocksize);
3558 ocfs2_xattr_bucket_journal_dirty(handle, bucket);
3566 * prev_blkno points to the start of an existing extent. new_blkno
3567 * points to a newly allocated extent. Because we know each of our
3568 * clusters contains more than bucket, we can easily split one cluster
3569 * at a bucket boundary. So we take the last cluster of the existing
3570 * extent and split it down the middle. We move the last half of the
3571 * buckets in the last cluster of the existing extent over to the new
3574 * first_bh is the buffer at prev_blkno so we can update the existing
3575 * extent's bucket count. header_bh is the bucket were we were hoping
3576 * to insert our xattr. If the bucket move places the target in the new
3577 * extent, we'll update first_bh and header_bh after modifying the old
3580 * first_hash will be set as the 1st xe's name_hash in the new extent.
3582 static int ocfs2_mv_xattr_bucket_cross_cluster(struct inode *inode,
3584 struct ocfs2_xattr_bucket *first,
3585 struct ocfs2_xattr_bucket *target,
3591 struct super_block *sb = inode->i_sb;
3592 int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(sb);
3593 int num_buckets = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(sb));
3594 int to_move = num_buckets / 2;
3596 u64 last_cluster_blkno = bucket_blkno(first) +
3597 ((num_clusters - 1) * ocfs2_clusters_to_blocks(sb, 1));
3599 BUG_ON(le16_to_cpu(bucket_xh(first)->xh_num_buckets) < num_buckets);
3600 BUG_ON(OCFS2_XATTR_BUCKET_SIZE == OCFS2_SB(sb)->s_clustersize);
3602 mlog(0, "move half of xattrs in cluster %llu to %llu\n",
3603 (unsigned long long)last_cluster_blkno, (unsigned long long)new_blkno);
3605 ret = ocfs2_mv_xattr_buckets(inode, handle, bucket_blkno(first),
3606 last_cluster_blkno, new_blkno,
3607 to_move, first_hash);
3613 /* This is the first bucket that got moved */
3614 src_blkno = last_cluster_blkno + (to_move * blks_per_bucket);
3617 * If the target bucket was part of the moved buckets, we need to
3618 * update first and target.
3620 if (bucket_blkno(target) >= src_blkno) {
3621 /* Find the block for the new target bucket */
3622 src_blkno = new_blkno +
3623 (bucket_blkno(target) - src_blkno);
3625 ocfs2_xattr_bucket_relse(first);
3626 ocfs2_xattr_bucket_relse(target);
3629 * These shouldn't fail - the buffers are in the
3630 * journal from ocfs2_cp_xattr_bucket().
3632 ret = ocfs2_read_xattr_bucket(first, new_blkno);
3637 ret = ocfs2_read_xattr_bucket(target, src_blkno);
3648 * Find the suitable pos when we divide a bucket into 2.
3649 * We have to make sure the xattrs with the same hash value exist
3650 * in the same bucket.
3652 * If this ocfs2_xattr_header covers more than one hash value, find a
3653 * place where the hash value changes. Try to find the most even split.
3654 * The most common case is that all entries have different hash values,
3655 * and the first check we make will find a place to split.
3657 static int ocfs2_xattr_find_divide_pos(struct ocfs2_xattr_header *xh)
3659 struct ocfs2_xattr_entry *entries = xh->xh_entries;
3660 int count = le16_to_cpu(xh->xh_count);
3661 int delta, middle = count / 2;
3664 * We start at the middle. Each step gets farther away in both
3665 * directions. We therefore hit the change in hash value
3666 * nearest to the middle. Note that this loop does not execute for
3669 for (delta = 0; delta < middle; delta++) {
3670 /* Let's check delta earlier than middle */
3671 if (cmp_xe(&entries[middle - delta - 1],
3672 &entries[middle - delta]))
3673 return middle - delta;
3675 /* For even counts, don't walk off the end */
3676 if ((middle + delta + 1) == count)
3679 /* Now try delta past middle */
3680 if (cmp_xe(&entries[middle + delta],
3681 &entries[middle + delta + 1]))
3682 return middle + delta + 1;
3685 /* Every entry had the same hash */
3690 * Move some xattrs in old bucket(blk) to new bucket(new_blk).
3691 * first_hash will record the 1st hash of the new bucket.
3693 * Normally half of the xattrs will be moved. But we have to make
3694 * sure that the xattrs with the same hash value are stored in the
3695 * same bucket. If all the xattrs in this bucket have the same hash
3696 * value, the new bucket will be initialized as an empty one and the
3697 * first_hash will be initialized as (hash_value+1).
3699 static int ocfs2_divide_xattr_bucket(struct inode *inode,
3704 int new_bucket_head)
3707 int count, start, len, name_value_len = 0, xe_len, name_offset = 0;
3708 struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL;
3709 struct ocfs2_xattr_header *xh;
3710 struct ocfs2_xattr_entry *xe;
3711 int blocksize = inode->i_sb->s_blocksize;
3713 mlog(0, "move some of xattrs from bucket %llu to %llu\n",
3714 (unsigned long long)blk, (unsigned long long)new_blk);
3716 s_bucket = ocfs2_xattr_bucket_new(inode);
3717 t_bucket = ocfs2_xattr_bucket_new(inode);
3718 if (!s_bucket || !t_bucket) {
3724 ret = ocfs2_read_xattr_bucket(s_bucket, blk);
3730 ret = ocfs2_xattr_bucket_journal_access(handle, s_bucket,
3731 OCFS2_JOURNAL_ACCESS_WRITE);
3738 * Even if !new_bucket_head, we're overwriting t_bucket. Thus,
3739 * there's no need to read it.
3741 ret = ocfs2_init_xattr_bucket(t_bucket, new_blk);
3748 * Hey, if we're overwriting t_bucket, what difference does
3749 * ACCESS_CREATE vs ACCESS_WRITE make? See the comment in the
3750 * same part of ocfs2_cp_xattr_bucket().
3752 ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket,
3754 OCFS2_JOURNAL_ACCESS_CREATE :
3755 OCFS2_JOURNAL_ACCESS_WRITE);
3761 xh = bucket_xh(s_bucket);
3762 count = le16_to_cpu(xh->xh_count);
3763 start = ocfs2_xattr_find_divide_pos(xh);
3765 if (start == count) {
3766 xe = &xh->xh_entries[start-1];
3769 * initialized a new empty bucket here.
3770 * The hash value is set as one larger than
3771 * that of the last entry in the previous bucket.
3773 for (i = 0; i < t_bucket->bu_blocks; i++)
3774 memset(bucket_block(t_bucket, i), 0, blocksize);
3776 xh = bucket_xh(t_bucket);
3777 xh->xh_free_start = cpu_to_le16(blocksize);
3778 xh->xh_entries[0].xe_name_hash = xe->xe_name_hash;
3779 le32_add_cpu(&xh->xh_entries[0].xe_name_hash, 1);
3781 goto set_num_buckets;
3784 /* copy the whole bucket to the new first. */
3785 ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket);
3787 /* update the new bucket. */
3788 xh = bucket_xh(t_bucket);
3791 * Calculate the total name/value len and xh_free_start for
3792 * the old bucket first.
3794 name_offset = OCFS2_XATTR_BUCKET_SIZE;
3796 for (i = 0; i < start; i++) {
3797 xe = &xh->xh_entries[i];
3798 xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
3799 if (ocfs2_xattr_is_local(xe))
3801 OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size));
3803 xe_len += OCFS2_XATTR_ROOT_SIZE;
3804 name_value_len += xe_len;
3805 if (le16_to_cpu(xe->xe_name_offset) < name_offset)
3806 name_offset = le16_to_cpu(xe->xe_name_offset);
3810 * Now begin the modification to the new bucket.
3812 * In the new bucket, We just move the xattr entry to the beginning
3813 * and don't touch the name/value. So there will be some holes in the
3814 * bucket, and they will be removed when ocfs2_defrag_xattr_bucket is
3817 xe = &xh->xh_entries[start];
3818 len = sizeof(struct ocfs2_xattr_entry) * (count - start);
3819 mlog(0, "mv xattr entry len %d from %d to %d\n", len,
3820 (int)((char *)xe - (char *)xh),
3821 (int)((char *)xh->xh_entries - (char *)xh));
3822 memmove((char *)xh->xh_entries, (char *)xe, len);
3823 xe = &xh->xh_entries[count - start];
3824 len = sizeof(struct ocfs2_xattr_entry) * start;
3825 memset((char *)xe, 0, len);
3827 le16_add_cpu(&xh->xh_count, -start);
3828 le16_add_cpu(&xh->xh_name_value_len, -name_value_len);
3830 /* Calculate xh_free_start for the new bucket. */
3831 xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE);
3832 for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
3833 xe = &xh->xh_entries[i];
3834 xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
3835 if (ocfs2_xattr_is_local(xe))
3837 OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size));
3839 xe_len += OCFS2_XATTR_ROOT_SIZE;
3840 if (le16_to_cpu(xe->xe_name_offset) <
3841 le16_to_cpu(xh->xh_free_start))
3842 xh->xh_free_start = xe->xe_name_offset;
3846 /* set xh->xh_num_buckets for the new xh. */
3847 if (new_bucket_head)
3848 xh->xh_num_buckets = cpu_to_le16(1);
3850 xh->xh_num_buckets = 0;
3852 ocfs2_xattr_bucket_journal_dirty(handle, t_bucket);
3854 /* store the first_hash of the new bucket. */
3856 *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash);
3859 * Now only update the 1st block of the old bucket. If we
3860 * just added a new empty bucket, there is no need to modify
3866 xh = bucket_xh(s_bucket);
3867 memset(&xh->xh_entries[start], 0,
3868 sizeof(struct ocfs2_xattr_entry) * (count - start));
3869 xh->xh_count = cpu_to_le16(start);
3870 xh->xh_free_start = cpu_to_le16(name_offset);
3871 xh->xh_name_value_len = cpu_to_le16(name_value_len);
3873 ocfs2_xattr_bucket_journal_dirty(handle, s_bucket);
3876 ocfs2_xattr_bucket_free(s_bucket);
3877 ocfs2_xattr_bucket_free(t_bucket);
3883 * Copy xattr from one bucket to another bucket.
3885 * The caller must make sure that the journal transaction
3886 * has enough space for journaling.
3888 static int ocfs2_cp_xattr_bucket(struct inode *inode,
3895 struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL;
3897 BUG_ON(s_blkno == t_blkno);
3899 mlog(0, "cp bucket %llu to %llu, target is %d\n",
3900 (unsigned long long)s_blkno, (unsigned long long)t_blkno,
3903 s_bucket = ocfs2_xattr_bucket_new(inode);
3904 t_bucket = ocfs2_xattr_bucket_new(inode);
3905 if (!s_bucket || !t_bucket) {
3911 ret = ocfs2_read_xattr_bucket(s_bucket, s_blkno);
3916 * Even if !t_is_new, we're overwriting t_bucket. Thus,
3917 * there's no need to read it.
3919 ret = ocfs2_init_xattr_bucket(t_bucket, t_blkno);
3924 * Hey, if we're overwriting t_bucket, what difference does
3925 * ACCESS_CREATE vs ACCESS_WRITE make? Well, if we allocated a new
3926 * cluster to fill, we came here from
3927 * ocfs2_mv_xattr_buckets(), and it is really new -
3928 * ACCESS_CREATE is required. But we also might have moved data
3929 * out of t_bucket before extending back into it.
3930 * ocfs2_add_new_xattr_bucket() can do this - its call to
3931 * ocfs2_add_new_xattr_cluster() may have created a new extent
3932 * and copied out the end of the old extent. Then it re-extends
3933 * the old extent back to create space for new xattrs. That's
3934 * how we get here, and the bucket isn't really new.
3936 ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket,
3938 OCFS2_JOURNAL_ACCESS_CREATE :
3939 OCFS2_JOURNAL_ACCESS_WRITE);
3943 ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket);
3944 ocfs2_xattr_bucket_journal_dirty(handle, t_bucket);
3947 ocfs2_xattr_bucket_free(t_bucket);
3948 ocfs2_xattr_bucket_free(s_bucket);
3954 * src_blk points to the start of an existing extent. last_blk points to
3955 * last cluster in that extent. to_blk points to a newly allocated
3956 * extent. We copy the buckets from the cluster at last_blk to the new
3957 * extent. If start_bucket is non-zero, we skip that many buckets before
3958 * we start copying. The new extent's xh_num_buckets gets set to the
3959 * number of buckets we copied. The old extent's xh_num_buckets shrinks
3960 * by the same amount.
3962 static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle,
3963 u64 src_blk, u64 last_blk, u64 to_blk,
3964 unsigned int start_bucket,
3967 int i, ret, credits;
3968 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
3969 int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
3970 int num_buckets = ocfs2_xattr_buckets_per_cluster(osb);
3971 struct ocfs2_xattr_bucket *old_first, *new_first;
3973 mlog(0, "mv xattrs from cluster %llu to %llu\n",
3974 (unsigned long long)last_blk, (unsigned long long)to_blk);
3976 BUG_ON(start_bucket >= num_buckets);
3978 num_buckets -= start_bucket;
3979 last_blk += (start_bucket * blks_per_bucket);
3982 /* The first bucket of the original extent */
3983 old_first = ocfs2_xattr_bucket_new(inode);
3984 /* The first bucket of the new extent */
3985 new_first = ocfs2_xattr_bucket_new(inode);
3986 if (!old_first || !new_first) {
3992 ret = ocfs2_read_xattr_bucket(old_first, src_blk);
3999 * We need to update the first bucket of the old extent and all
4000 * the buckets going to the new extent.
4002 credits = ((num_buckets + 1) * blks_per_bucket) +
4003 handle->h_buffer_credits;
4004 ret = ocfs2_extend_trans(handle, credits);
4010 ret = ocfs2_xattr_bucket_journal_access(handle, old_first,
4011 OCFS2_JOURNAL_ACCESS_WRITE);
4017 for (i = 0; i < num_buckets; i++) {
4018 ret = ocfs2_cp_xattr_bucket(inode, handle,
4019 last_blk + (i * blks_per_bucket),
4020 to_blk + (i * blks_per_bucket),
4029 * Get the new bucket ready before we dirty anything
4030 * (This actually shouldn't fail, because we already dirtied
4031 * it once in ocfs2_cp_xattr_bucket()).
4033 ret = ocfs2_read_xattr_bucket(new_first, to_blk);
4038 ret = ocfs2_xattr_bucket_journal_access(handle, new_first,
4039 OCFS2_JOURNAL_ACCESS_WRITE);
4045 /* Now update the headers */
4046 le16_add_cpu(&bucket_xh(old_first)->xh_num_buckets, -num_buckets);
4047 ocfs2_xattr_bucket_journal_dirty(handle, old_first);
4049 bucket_xh(new_first)->xh_num_buckets = cpu_to_le16(num_buckets);
4050 ocfs2_xattr_bucket_journal_dirty(handle, new_first);
4053 *first_hash = le32_to_cpu(bucket_xh(new_first)->xh_entries[0].xe_name_hash);
4056 ocfs2_xattr_bucket_free(new_first);
4057 ocfs2_xattr_bucket_free(old_first);
4062 * Move some xattrs in this cluster to the new cluster.
4063 * This function should only be called when bucket size == cluster size.
4064 * Otherwise ocfs2_mv_xattr_bucket_cross_cluster should be used instead.
4066 static int ocfs2_divide_xattr_cluster(struct inode *inode,
4072 u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
4073 int ret, credits = 2 * blk_per_bucket + handle->h_buffer_credits;
4075 BUG_ON(OCFS2_XATTR_BUCKET_SIZE < OCFS2_SB(inode->i_sb)->s_clustersize);
4077 ret = ocfs2_extend_trans(handle, credits);
4083 /* Move half of the xattr in start_blk to the next bucket. */
4084 return ocfs2_divide_xattr_bucket(inode, handle, prev_blk,
4085 new_blk, first_hash, 1);
4089 * Move some xattrs from the old cluster to the new one since they are not
4090 * contiguous in ocfs2 xattr tree.
4092 * new_blk starts a new separate cluster, and we will move some xattrs from
4093 * prev_blk to it. v_start will be set as the first name hash value in this
4094 * new cluster so that it can be used as e_cpos during tree insertion and
4095 * don't collide with our original b-tree operations. first_bh and header_bh
4096 * will also be updated since they will be used in ocfs2_extend_xattr_bucket
4097 * to extend the insert bucket.
4099 * The problem is how much xattr should we move to the new one and when should
4100 * we update first_bh and header_bh?
4101 * 1. If cluster size > bucket size, that means the previous cluster has more
4102 * than 1 bucket, so just move half nums of bucket into the new cluster and
4103 * update the first_bh and header_bh if the insert bucket has been moved
4104 * to the new cluster.
4105 * 2. If cluster_size == bucket_size:
4106 * a) If the previous extent rec has more than one cluster and the insert
4107 * place isn't in the last cluster, copy the entire last cluster to the
4108 * new one. This time, we don't need to upate the first_bh and header_bh
4109 * since they will not be moved into the new cluster.
4110 * b) Otherwise, move the bottom half of the xattrs in the last cluster into
4111 * the new one. And we set the extend flag to zero if the insert place is
4112 * moved into the new allocated cluster since no extend is needed.
4114 static int ocfs2_adjust_xattr_cross_cluster(struct inode *inode,
4116 struct ocfs2_xattr_bucket *first,
4117 struct ocfs2_xattr_bucket *target,
4125 mlog(0, "adjust xattrs from cluster %llu len %u to %llu\n",
4126 (unsigned long long)bucket_blkno(first), prev_clusters,
4127 (unsigned long long)new_blk);
4129 if (ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)) > 1) {
4130 ret = ocfs2_mv_xattr_bucket_cross_cluster(inode,
4139 /* The start of the last cluster in the first extent */
4140 u64 last_blk = bucket_blkno(first) +
4141 ((prev_clusters - 1) *
4142 ocfs2_clusters_to_blocks(inode->i_sb, 1));
4144 if (prev_clusters > 1 && bucket_blkno(target) != last_blk) {
4145 ret = ocfs2_mv_xattr_buckets(inode, handle,
4146 bucket_blkno(first),
4147 last_blk, new_blk, 0,
4152 ret = ocfs2_divide_xattr_cluster(inode, handle,
4158 if ((bucket_blkno(target) == last_blk) && extend)
4167 * Add a new cluster for xattr storage.
4169 * If the new cluster is contiguous with the previous one, it will be
4170 * appended to the same extent record, and num_clusters will be updated.
4171 * If not, we will insert a new extent for it and move some xattrs in
4172 * the last cluster into the new allocated one.
4173 * We also need to limit the maximum size of a btree leaf, otherwise we'll
4174 * lose the benefits of hashing because we'll have to search large leaves.
4175 * So now the maximum size is OCFS2_MAX_XATTR_TREE_LEAF_SIZE(or clustersize,
4178 * first_bh is the first block of the previous extent rec and header_bh
4179 * indicates the bucket we will insert the new xattrs. They will be updated
4180 * when the header_bh is moved into the new cluster.
4182 static int ocfs2_add_new_xattr_cluster(struct inode *inode,
4183 struct buffer_head *root_bh,
4184 struct ocfs2_xattr_bucket *first,
4185 struct ocfs2_xattr_bucket *target,
4189 struct ocfs2_xattr_set_ctxt *ctxt)
4192 u16 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1);
4193 u32 prev_clusters = *num_clusters;
4194 u32 clusters_to_add = 1, bit_off, num_bits, v_start = 0;
4196 handle_t *handle = ctxt->handle;
4197 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
4198 struct ocfs2_extent_tree et;
4200 mlog(0, "Add new xattr cluster for %llu, previous xattr hash = %u, "
4201 "previous xattr blkno = %llu\n",
4202 (unsigned long long)OCFS2_I(inode)->ip_blkno,
4203 prev_cpos, (unsigned long long)bucket_blkno(first));
4205 ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh);
4207 ret = ocfs2_journal_access(handle, inode, root_bh,
4208 OCFS2_JOURNAL_ACCESS_WRITE);
4214 ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac, 1,
4215 clusters_to_add, &bit_off, &num_bits);
4222 BUG_ON(num_bits > clusters_to_add);
4224 block = ocfs2_clusters_to_blocks(osb->sb, bit_off);
4225 mlog(0, "Allocating %u clusters at block %u for xattr in inode %llu\n",
4226 num_bits, bit_off, (unsigned long long)OCFS2_I(inode)->ip_blkno);
4228 if (bucket_blkno(first) + (prev_clusters * bpc) == block &&
4229 (prev_clusters + num_bits) << osb->s_clustersize_bits <=
4230 OCFS2_MAX_XATTR_TREE_LEAF_SIZE) {
4232 * If this cluster is contiguous with the old one and
4233 * adding this new cluster, we don't surpass the limit of
4234 * OCFS2_MAX_XATTR_TREE_LEAF_SIZE, cool. We will let it be
4235 * initialized and used like other buckets in the previous
4237 * So add it as a contiguous one. The caller will handle
4240 v_start = prev_cpos + prev_clusters;
4241 *num_clusters = prev_clusters + num_bits;
4242 mlog(0, "Add contiguous %u clusters to previous extent rec.\n",
4245 ret = ocfs2_adjust_xattr_cross_cluster(inode,
4259 mlog(0, "Insert %u clusters at block %llu for xattr at %u\n",
4260 num_bits, (unsigned long long)block, v_start);
4261 ret = ocfs2_insert_extent(osb, handle, inode, &et, v_start, block,
4262 num_bits, 0, ctxt->meta_ac);
4268 ret = ocfs2_journal_dirty(handle, root_bh);
4277 * We are given an extent. 'first' is the bucket at the very front of
4278 * the extent. The extent has space for an additional bucket past
4279 * bucket_xh(first)->xh_num_buckets. 'target_blkno' is the block number
4280 * of the target bucket. We wish to shift every bucket past the target
4281 * down one, filling in that additional space. When we get back to the
4282 * target, we split the target between itself and the now-empty bucket
4283 * at target+1 (aka, target_blkno + blks_per_bucket).
4285 static int ocfs2_extend_xattr_bucket(struct inode *inode,
4287 struct ocfs2_xattr_bucket *first,
4292 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
4293 u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
4295 u16 new_bucket = le16_to_cpu(bucket_xh(first)->xh_num_buckets);
4297 mlog(0, "extend xattr bucket in %llu, xattr extend rec starting "
4298 "from %llu, len = %u\n", (unsigned long long)target_blk,
4299 (unsigned long long)bucket_blkno(first), num_clusters);
4301 /* The extent must have room for an additional bucket */
4302 BUG_ON(new_bucket >=
4303 (num_clusters * ocfs2_xattr_buckets_per_cluster(osb)));
4305 /* end_blk points to the last existing bucket */
4306 end_blk = bucket_blkno(first) + ((new_bucket - 1) * blk_per_bucket);
4309 * end_blk is the start of the last existing bucket.
4310 * Thus, (end_blk - target_blk) covers the target bucket and
4311 * every bucket after it up to, but not including, the last
4312 * existing bucket. Then we add the last existing bucket, the
4313 * new bucket, and the first bucket (3 * blk_per_bucket).
4315 credits = (end_blk - target_blk) + (3 * blk_per_bucket) +
4316 handle->h_buffer_credits;
4317 ret = ocfs2_extend_trans(handle, credits);
4323 ret = ocfs2_xattr_bucket_journal_access(handle, first,
4324 OCFS2_JOURNAL_ACCESS_WRITE);
4330 while (end_blk != target_blk) {
4331 ret = ocfs2_cp_xattr_bucket(inode, handle, end_blk,
4332 end_blk + blk_per_bucket, 0);
4335 end_blk -= blk_per_bucket;
4338 /* Move half of the xattr in target_blkno to the next bucket. */
4339 ret = ocfs2_divide_xattr_bucket(inode, handle, target_blk,
4340 target_blk + blk_per_bucket, NULL, 0);
4342 le16_add_cpu(&bucket_xh(first)->xh_num_buckets, 1);
4343 ocfs2_xattr_bucket_journal_dirty(handle, first);
4350 * Add new xattr bucket in an extent record and adjust the buckets
4351 * accordingly. xb_bh is the ocfs2_xattr_block, and target is the
4352 * bucket we want to insert into.
4354 * In the easy case, we will move all the buckets after target down by
4355 * one. Half of target's xattrs will be moved to the next bucket.
4357 * If current cluster is full, we'll allocate a new one. This may not
4358 * be contiguous. The underlying calls will make sure that there is
4359 * space for the insert, shifting buckets around if necessary.
4360 * 'target' may be moved by those calls.
4362 static int ocfs2_add_new_xattr_bucket(struct inode *inode,
4363 struct buffer_head *xb_bh,
4364 struct ocfs2_xattr_bucket *target,
4365 struct ocfs2_xattr_set_ctxt *ctxt)
4367 struct ocfs2_xattr_block *xb =
4368 (struct ocfs2_xattr_block *)xb_bh->b_data;
4369 struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root;
4370 struct ocfs2_extent_list *el = &xb_root->xt_list;
4372 le32_to_cpu(bucket_xh(target)->xh_entries[0].xe_name_hash);
4373 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
4374 int ret, num_buckets, extend = 1;
4376 u32 e_cpos, num_clusters;
4377 /* The bucket at the front of the extent */
4378 struct ocfs2_xattr_bucket *first;
4380 mlog(0, "Add new xattr bucket starting from %llu\n",
4381 (unsigned long long)bucket_blkno(target));
4383 /* The first bucket of the original extent */
4384 first = ocfs2_xattr_bucket_new(inode);
4391 ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &e_cpos,
4398 ret = ocfs2_read_xattr_bucket(first, p_blkno);
4404 num_buckets = ocfs2_xattr_buckets_per_cluster(osb) * num_clusters;
4405 if (num_buckets == le16_to_cpu(bucket_xh(first)->xh_num_buckets)) {
4407 * This can move first+target if the target bucket moves
4408 * to the new extent.
4410 ret = ocfs2_add_new_xattr_cluster(inode,
4425 ret = ocfs2_extend_xattr_bucket(inode,
4428 bucket_blkno(target),
4435 ocfs2_xattr_bucket_free(first);
4440 static inline char *ocfs2_xattr_bucket_get_val(struct inode *inode,
4441 struct ocfs2_xattr_bucket *bucket,
4444 int block_off = offs >> inode->i_sb->s_blocksize_bits;
4446 offs = offs % inode->i_sb->s_blocksize;
4447 return bucket_block(bucket, block_off) + offs;
4451 * Handle the normal xattr set, including replace, delete and new.
4453 * Note: "local" indicates the real data's locality. So we can't
4454 * just its bucket locality by its length.
4456 static void ocfs2_xattr_set_entry_normal(struct inode *inode,
4457 struct ocfs2_xattr_info *xi,
4458 struct ocfs2_xattr_search *xs,
4462 struct ocfs2_xattr_entry *last, *xe;
4463 int name_len = strlen(xi->name);
4464 struct ocfs2_xattr_header *xh = xs->header;
4465 u16 count = le16_to_cpu(xh->xh_count), start;
4466 size_t blocksize = inode->i_sb->s_blocksize;
4468 size_t offs, size, new_size;
4470 last = &xh->xh_entries[count];
4471 if (!xs->not_found) {
4473 offs = le16_to_cpu(xe->xe_name_offset);
4474 if (ocfs2_xattr_is_local(xe))
4475 size = OCFS2_XATTR_SIZE(name_len) +
4476 OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size));
4478 size = OCFS2_XATTR_SIZE(name_len) +
4479 OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE);
4482 * If the new value will be stored outside, xi->value has been
4483 * initalized as an empty ocfs2_xattr_value_root, and the same
4484 * goes with xi->value_len, so we can set new_size safely here.
4485 * See ocfs2_xattr_set_in_bucket.
4487 new_size = OCFS2_XATTR_SIZE(name_len) +
4488 OCFS2_XATTR_SIZE(xi->value_len);
4490 le16_add_cpu(&xh->xh_name_value_len, -size);
4492 if (new_size > size)
4493 goto set_new_name_value;
4495 /* Now replace the old value with new one. */
4497 xe->xe_value_size = cpu_to_le64(xi->value_len);
4499 xe->xe_value_size = 0;
4501 val = ocfs2_xattr_bucket_get_val(inode,
4503 memset(val + OCFS2_XATTR_SIZE(name_len), 0,
4504 size - OCFS2_XATTR_SIZE(name_len));
4505 if (OCFS2_XATTR_SIZE(xi->value_len) > 0)
4506 memcpy(val + OCFS2_XATTR_SIZE(name_len),
4507 xi->value, xi->value_len);
4509 le16_add_cpu(&xh->xh_name_value_len, new_size);
4510 ocfs2_xattr_set_local(xe, local);
4514 * Remove the old entry if there is more than one.
4515 * We don't remove the last entry so that we can
4516 * use it to indicate the hash value of the empty
4520 le16_add_cpu(&xh->xh_count, -1);
4523 (void *)last - (void *)xe);
4525 sizeof(struct ocfs2_xattr_entry));
4528 cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE);
4533 /* find a new entry for insert. */
4534 int low = 0, high = count - 1, tmp;
4535 struct ocfs2_xattr_entry *tmp_xe;
4537 while (low <= high && count) {
4538 tmp = (low + high) / 2;
4539 tmp_xe = &xh->xh_entries[tmp];
4541 if (name_hash > le32_to_cpu(tmp_xe->xe_name_hash))
4543 else if (name_hash <
4544 le32_to_cpu(tmp_xe->xe_name_hash))
4552 xe = &xh->xh_entries[low];
4554 memmove(xe + 1, xe, (void *)last - (void *)xe);
4556 le16_add_cpu(&xh->xh_count, 1);
4557 memset(xe, 0, sizeof(struct ocfs2_xattr_entry));
4558 xe->xe_name_hash = cpu_to_le32(name_hash);
4559 xe->xe_name_len = name_len;
4560 ocfs2_xattr_set_type(xe, xi->name_index);
4564 /* Insert the new name+value. */
4565 size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(xi->value_len);
4568 * We must make sure that the name/value pair
4569 * exists in the same block.
4571 offs = le16_to_cpu(xh->xh_free_start);
4572 start = offs - size;
4574 if (start >> inode->i_sb->s_blocksize_bits !=
4575 (offs - 1) >> inode->i_sb->s_blocksize_bits) {
4576 offs = offs - offs % blocksize;
4577 xh->xh_free_start = cpu_to_le16(offs);
4580 val = ocfs2_xattr_bucket_get_val(inode, xs->bucket, offs - size);
4581 xe->xe_name_offset = cpu_to_le16(offs - size);
4583 memset(val, 0, size);
4584 memcpy(val, xi->name, name_len);
4585 memcpy(val + OCFS2_XATTR_SIZE(name_len), xi->value, xi->value_len);
4587 xe->xe_value_size = cpu_to_le64(xi->value_len);
4588 ocfs2_xattr_set_local(xe, local);
4590 le16_add_cpu(&xh->xh_free_start, -size);
4591 le16_add_cpu(&xh->xh_name_value_len, size);
4597 * Set the xattr entry in the specified bucket.
4598 * The bucket is indicated by xs->bucket and it should have the enough
4599 * space for the xattr insertion.
4601 static int ocfs2_xattr_set_entry_in_bucket(struct inode *inode,
4603 struct ocfs2_xattr_info *xi,
4604 struct ocfs2_xattr_search *xs,
4611 mlog(0, "Set xattr entry len = %lu index = %d in bucket %llu\n",
4612 (unsigned long)xi->value_len, xi->name_index,
4613 (unsigned long long)bucket_blkno(xs->bucket));
4615 if (!xs->bucket->bu_bhs[1]) {
4616 blkno = bucket_blkno(xs->bucket);
4617 ocfs2_xattr_bucket_relse(xs->bucket);
4618 ret = ocfs2_read_xattr_bucket(xs->bucket, blkno);
4625 ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket,
4626 OCFS2_JOURNAL_ACCESS_WRITE);
4632 ocfs2_xattr_set_entry_normal(inode, xi, xs, name_hash, local);
4633 ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket);
4640 * Truncate the specified xe_off entry in xattr bucket.
4641 * bucket is indicated by header_bh and len is the new length.
4642 * Both the ocfs2_xattr_value_root and the entry will be updated here.
4644 * Copy the new updated xe and xe_value_root to new_xe and new_xv if needed.
4646 static int ocfs2_xattr_bucket_value_truncate(struct inode *inode,
4647 struct ocfs2_xattr_bucket *bucket,
4650 struct ocfs2_xattr_set_ctxt *ctxt)
4654 struct buffer_head *value_bh = NULL;
4655 struct ocfs2_xattr_value_root *xv;
4656 struct ocfs2_xattr_entry *xe;
4657 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
4658 size_t blocksize = inode->i_sb->s_blocksize;
4660 xe = &xh->xh_entries[xe_off];
4662 BUG_ON(!xe || ocfs2_xattr_is_local(xe));
4664 offset = le16_to_cpu(xe->xe_name_offset) +
4665 OCFS2_XATTR_SIZE(xe->xe_name_len);
4667 value_blk = offset / blocksize;
4669 /* We don't allow ocfs2_xattr_value to be stored in different block. */
4670 BUG_ON(value_blk != (offset + OCFS2_XATTR_ROOT_SIZE - 1) / blocksize);
4672 value_bh = bucket->bu_bhs[value_blk];
4675 xv = (struct ocfs2_xattr_value_root *)
4676 (value_bh->b_data + offset % blocksize);
4678 ret = ocfs2_xattr_bucket_journal_access(ctxt->handle, bucket,
4679 OCFS2_JOURNAL_ACCESS_WRITE);
4686 * From here on out we have to dirty the bucket. The generic
4687 * value calls only modify one of the bucket's bhs, but we need
4688 * to send the bucket at once. So if they error, they *could* have
4689 * modified something. We have to assume they did, and dirty
4690 * the whole bucket. This leaves us in a consistent state.
4692 mlog(0, "truncate %u in xattr bucket %llu to %d bytes.\n",
4693 xe_off, (unsigned long long)bucket_blkno(bucket), len);
4694 ret = ocfs2_xattr_value_truncate(inode, value_bh, xv, len, ctxt);
4700 xe->xe_value_size = cpu_to_le64(len);
4703 ocfs2_xattr_bucket_journal_dirty(ctxt->handle, bucket);
4709 static int ocfs2_xattr_bucket_value_truncate_xs(struct inode *inode,
4710 struct ocfs2_xattr_search *xs,
4712 struct ocfs2_xattr_set_ctxt *ctxt)
4715 struct ocfs2_xattr_entry *xe = xs->here;
4716 struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *)xs->base;
4718 BUG_ON(!xs->bucket->bu_bhs[0] || !xe || ocfs2_xattr_is_local(xe));
4720 offset = xe - xh->xh_entries;
4721 ret = ocfs2_xattr_bucket_value_truncate(inode, xs->bucket,
4729 static int ocfs2_xattr_bucket_set_value_outside(struct inode *inode,
4731 struct ocfs2_xattr_search *xs,
4736 struct ocfs2_xattr_value_root *xv;
4737 struct ocfs2_xattr_entry *xe = xs->here;
4739 BUG_ON(!xs->base || !xe || ocfs2_xattr_is_local(xe));
4741 offset = le16_to_cpu(xe->xe_name_offset) +
4742 OCFS2_XATTR_SIZE(xe->xe_name_len);
4744 xv = (struct ocfs2_xattr_value_root *)(xs->base + offset);
4746 return __ocfs2_xattr_set_value_outside(inode, handle,
4747 xv, val, value_len);
4750 static int ocfs2_rm_xattr_cluster(struct inode *inode,
4751 struct buffer_head *root_bh,
4757 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
4758 struct inode *tl_inode = osb->osb_tl_inode;
4760 struct ocfs2_xattr_block *xb =
4761 (struct ocfs2_xattr_block *)root_bh->b_data;
4762 struct ocfs2_alloc_context *meta_ac = NULL;
4763 struct ocfs2_cached_dealloc_ctxt dealloc;
4764 struct ocfs2_extent_tree et;
4766 ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh);
4768 ocfs2_init_dealloc_ctxt(&dealloc);
4770 mlog(0, "rm xattr extent rec at %u len = %u, start from %llu\n",
4771 cpos, len, (unsigned long long)blkno);
4773 ocfs2_remove_xattr_clusters_from_cache(inode, blkno, len);
4775 ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac);
4781 mutex_lock(&tl_inode->i_mutex);
4783 if (ocfs2_truncate_log_needs_flush(osb)) {
4784 ret = __ocfs2_flush_truncate_log(osb);
4791 handle = ocfs2_start_trans(osb, ocfs2_remove_extent_credits(osb->sb));
4792 if (IS_ERR(handle)) {
4798 ret = ocfs2_journal_access(handle, inode, root_bh,
4799 OCFS2_JOURNAL_ACCESS_WRITE);
4805 ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, meta_ac,
4812 le32_add_cpu(&xb->xb_attrs.xb_root.xt_clusters, -len);
4814 ret = ocfs2_journal_dirty(handle, root_bh);
4820 ret = ocfs2_truncate_log_append(osb, handle, blkno, len);
4825 ocfs2_commit_trans(osb, handle);
4827 ocfs2_schedule_truncate_log_flush(osb, 1);
4829 mutex_unlock(&tl_inode->i_mutex);
4832 ocfs2_free_alloc_context(meta_ac);
4834 ocfs2_run_deallocs(osb, &dealloc);
4839 static void ocfs2_xattr_bucket_remove_xs(struct inode *inode,
4841 struct ocfs2_xattr_search *xs)
4843 struct ocfs2_xattr_header *xh = bucket_xh(xs->bucket);
4844 struct ocfs2_xattr_entry *last = &xh->xh_entries[
4845 le16_to_cpu(xh->xh_count) - 1];
4848 ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket,
4849 OCFS2_JOURNAL_ACCESS_WRITE);
4855 /* Remove the old entry. */
4856 memmove(xs->here, xs->here + 1,
4857 (void *)last - (void *)xs->here);
4858 memset(last, 0, sizeof(struct ocfs2_xattr_entry));
4859 le16_add_cpu(&xh->xh_count, -1);
4861 ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket);
4865 * Set the xattr name/value in the bucket specified in xs.
4867 * As the new value in xi may be stored in the bucket or in an outside cluster,
4868 * we divide the whole process into 3 steps:
4869 * 1. insert name/value in the bucket(ocfs2_xattr_set_entry_in_bucket)
4870 * 2. truncate of the outside cluster(ocfs2_xattr_bucket_value_truncate_xs)
4871 * 3. Set the value to the outside cluster(ocfs2_xattr_bucket_set_value_outside)
4872 * 4. If the clusters for the new outside value can't be allocated, we need
4873 * to free the xattr we allocated in set.
4875 static int ocfs2_xattr_set_in_bucket(struct inode *inode,
4876 struct ocfs2_xattr_info *xi,
4877 struct ocfs2_xattr_search *xs,
4878 struct ocfs2_xattr_set_ctxt *ctxt)
4882 char *val = (char *)xi->value;
4883 struct ocfs2_xattr_entry *xe = xs->here;
4884 u32 name_hash = ocfs2_xattr_name_hash(inode, xi->name,
4887 if (!xs->not_found && !ocfs2_xattr_is_local(xe)) {
4889 * We need to truncate the xattr storage first.
4891 * If both the old and new value are stored to
4892 * outside block, we only need to truncate
4893 * the storage and then set the value outside.
4895 * If the new value should be stored within block,
4896 * we should free all the outside block first and
4897 * the modification to the xattr block will be done
4898 * by following steps.
4900 if (xi->value_len > OCFS2_XATTR_INLINE_SIZE)
4901 value_len = xi->value_len;
4905 ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs,
4912 goto set_value_outside;
4915 value_len = xi->value_len;
4916 /* So we have to handle the inside block change now. */
4917 if (value_len > OCFS2_XATTR_INLINE_SIZE) {
4919 * If the new value will be stored outside of block,
4920 * initalize a new empty value root and insert it first.
4923 xi->value = &def_xv;
4924 xi->value_len = OCFS2_XATTR_ROOT_SIZE;
4927 ret = ocfs2_xattr_set_entry_in_bucket(inode, ctxt->handle, xi, xs,
4934 if (value_len <= OCFS2_XATTR_INLINE_SIZE)
4937 /* allocate the space now for the outside block storage. */
4938 ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs,
4943 if (xs->not_found) {
4945 * We can't allocate enough clusters for outside
4946 * storage and we have allocated xattr already,
4947 * so need to remove it.
4949 ocfs2_xattr_bucket_remove_xs(inode, ctxt->handle, xs);
4955 ret = ocfs2_xattr_bucket_set_value_outside(inode, ctxt->handle,
4956 xs, val, value_len);
4962 * check whether the xattr bucket is filled up with the same hash value.
4963 * If we want to insert the xattr with the same hash, return -ENOSPC.
4964 * If we want to insert a xattr with different hash value, go ahead
4965 * and ocfs2_divide_xattr_bucket will handle this.
4967 static int ocfs2_check_xattr_bucket_collision(struct inode *inode,
4968 struct ocfs2_xattr_bucket *bucket,
4971 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
4972 u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name));
4974 if (name_hash != le32_to_cpu(xh->xh_entries[0].xe_name_hash))
4977 if (xh->xh_entries[le16_to_cpu(xh->xh_count) - 1].xe_name_hash ==
4978 xh->xh_entries[0].xe_name_hash) {
4979 mlog(ML_ERROR, "Too much hash collision in xattr bucket %llu, "
4981 (unsigned long long)bucket_blkno(bucket),
4982 le32_to_cpu(xh->xh_entries[0].xe_name_hash));
4989 static int ocfs2_xattr_set_entry_index_block(struct inode *inode,
4990 struct ocfs2_xattr_info *xi,
4991 struct ocfs2_xattr_search *xs,
4992 struct ocfs2_xattr_set_ctxt *ctxt)
4994 struct ocfs2_xattr_header *xh;
4995 struct ocfs2_xattr_entry *xe;
4996 u16 count, header_size, xh_free_start;
4997 int free, max_free, need, old;
4998 size_t value_size = 0, name_len = strlen(xi->name);
4999 size_t blocksize = inode->i_sb->s_blocksize;
5000 int ret, allocation = 0;
5002 mlog_entry("Set xattr %s in xattr index block\n", xi->name);
5006 count = le16_to_cpu(xh->xh_count);
5007 xh_free_start = le16_to_cpu(xh->xh_free_start);
5008 header_size = sizeof(struct ocfs2_xattr_header) +
5009 count * sizeof(struct ocfs2_xattr_entry);
5010 max_free = OCFS2_XATTR_BUCKET_SIZE -
5011 le16_to_cpu(xh->xh_name_value_len) - header_size;
5013 mlog_bug_on_msg(header_size > blocksize, "bucket %llu has header size "
5014 "of %u which exceed block size\n",
5015 (unsigned long long)bucket_blkno(xs->bucket),
5018 if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE)
5019 value_size = OCFS2_XATTR_ROOT_SIZE;
5021 value_size = OCFS2_XATTR_SIZE(xi->value_len);
5024 need = sizeof(struct ocfs2_xattr_entry) +
5025 OCFS2_XATTR_SIZE(name_len) + value_size;
5027 need = value_size + OCFS2_XATTR_SIZE(name_len);
5030 * We only replace the old value if the new length is smaller
5031 * than the old one. Otherwise we will allocate new space in the
5032 * bucket to store it.
5035 if (ocfs2_xattr_is_local(xe))
5036 old = OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size));
5038 old = OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE);
5040 if (old >= value_size)
5044 free = xh_free_start - header_size;
5046 * We need to make sure the new name/value pair
5047 * can exist in the same block.
5049 if (xh_free_start % blocksize < need)
5050 free -= xh_free_start % blocksize;
5052 mlog(0, "xs->not_found = %d, in xattr bucket %llu: free = %d, "
5053 "need = %d, max_free = %d, xh_free_start = %u, xh_name_value_len ="
5054 " %u\n", xs->not_found,
5055 (unsigned long long)bucket_blkno(xs->bucket),
5056 free, need, max_free, le16_to_cpu(xh->xh_free_start),
5057 le16_to_cpu(xh->xh_name_value_len));
5061 count == ocfs2_xattr_max_xe_in_bucket(inode->i_sb))) {
5062 if (need <= max_free &&
5063 count < ocfs2_xattr_max_xe_in_bucket(inode->i_sb)) {
5065 * We can create the space by defragment. Since only the
5066 * name/value will be moved, the xe shouldn't be changed
5069 ret = ocfs2_defrag_xattr_bucket(inode, ctxt->handle,
5076 xh_free_start = le16_to_cpu(xh->xh_free_start);
5077 free = xh_free_start - header_size;
5078 if (xh_free_start % blocksize < need)
5079 free -= xh_free_start % blocksize;
5084 mlog(0, "Can't get enough space for xattr insert by "
5085 "defragment. Need %u bytes, but we have %d, so "
5086 "allocate new bucket for it.\n", need, free);
5090 * We have to add new buckets or clusters and one
5091 * allocation should leave us enough space for insert.
5096 * We do not allow for overlapping ranges between buckets. And
5097 * the maximum number of collisions we will allow for then is
5098 * one bucket's worth, so check it here whether we need to
5099 * add a new bucket for the insert.
5101 ret = ocfs2_check_xattr_bucket_collision(inode,
5109 ret = ocfs2_add_new_xattr_bucket(inode,
5119 * ocfs2_add_new_xattr_bucket() will have updated
5120 * xs->bucket if it moved, but it will not have updated
5121 * any of the other search fields. Thus, we drop it and
5122 * re-search. Everything should be cached, so it'll be
5125 ocfs2_xattr_bucket_relse(xs->bucket);
5126 ret = ocfs2_xattr_index_block_find(inode, xs->xattr_bh,
5129 if (ret && ret != -ENODATA)
5131 xs->not_found = ret;
5137 ret = ocfs2_xattr_set_in_bucket(inode, xi, xs, ctxt);
5143 static int ocfs2_delete_xattr_in_bucket(struct inode *inode,
5144 struct ocfs2_xattr_bucket *bucket,
5148 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
5150 struct ocfs2_xattr_entry *xe;
5151 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5152 struct ocfs2_xattr_set_ctxt ctxt = {NULL, NULL,};
5153 int credits = ocfs2_remove_extent_credits(osb->sb) +
5154 ocfs2_blocks_per_xattr_bucket(inode->i_sb);
5157 ocfs2_init_dealloc_ctxt(&ctxt.dealloc);
5159 for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
5160 xe = &xh->xh_entries[i];
5161 if (ocfs2_xattr_is_local(xe))
5164 ctxt.handle = ocfs2_start_trans(osb, credits);
5165 if (IS_ERR(ctxt.handle)) {
5166 ret = PTR_ERR(ctxt.handle);
5171 ret = ocfs2_xattr_bucket_value_truncate(inode, bucket,
5174 ocfs2_commit_trans(osb, ctxt.handle);
5181 ocfs2_schedule_truncate_log_flush(osb, 1);
5182 ocfs2_run_deallocs(osb, &ctxt.dealloc);
5186 static int ocfs2_delete_xattr_index_block(struct inode *inode,
5187 struct buffer_head *xb_bh)
5189 struct ocfs2_xattr_block *xb =
5190 (struct ocfs2_xattr_block *)xb_bh->b_data;
5191 struct ocfs2_extent_list *el = &xb->xb_attrs.xb_root.xt_list;
5193 u32 name_hash = UINT_MAX, e_cpos, num_clusters;
5196 if (le16_to_cpu(el->l_next_free_rec) == 0)
5199 while (name_hash > 0) {
5200 ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno,
5201 &e_cpos, &num_clusters, el);
5207 ret = ocfs2_iterate_xattr_buckets(inode, p_blkno, num_clusters,
5208 ocfs2_delete_xattr_in_bucket,
5215 ret = ocfs2_rm_xattr_cluster(inode, xb_bh,
5216 p_blkno, e_cpos, num_clusters);
5225 name_hash = e_cpos - 1;
5233 * 'security' attributes support
5235 static size_t ocfs2_xattr_security_list(struct inode *inode, char *list,
5236 size_t list_size, const char *name,
5239 const size_t prefix_len = XATTR_SECURITY_PREFIX_LEN;
5240 const size_t total_len = prefix_len + name_len + 1;
5242 if (list && total_len <= list_size) {
5243 memcpy(list, XATTR_SECURITY_PREFIX, prefix_len);
5244 memcpy(list + prefix_len, name, name_len);
5245 list[prefix_len + name_len] = '\0';
5250 static int ocfs2_xattr_security_get(struct inode *inode, const char *name,
5251 void *buffer, size_t size)
5253 if (strcmp(name, "") == 0)
5255 return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_SECURITY, name,
5259 static int ocfs2_xattr_security_set(struct inode *inode, const char *name,
5260 const void *value, size_t size, int flags)
5262 if (strcmp(name, "") == 0)
5265 return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_SECURITY, name, value,
5269 int ocfs2_init_security_get(struct inode *inode,
5271 struct ocfs2_security_xattr_info *si)
5273 return security_inode_init_security(inode, dir, &si->name, &si->value,
5277 int ocfs2_init_security_set(handle_t *handle,
5278 struct inode *inode,
5279 struct buffer_head *di_bh,
5280 struct ocfs2_security_xattr_info *si,
5281 struct ocfs2_alloc_context *xattr_ac,
5282 struct ocfs2_alloc_context *data_ac)
5284 return ocfs2_xattr_set_handle(handle, inode, di_bh,
5285 OCFS2_XATTR_INDEX_SECURITY,
5286 si->name, si->value, si->value_len, 0,
5290 struct xattr_handler ocfs2_xattr_security_handler = {
5291 .prefix = XATTR_SECURITY_PREFIX,
5292 .list = ocfs2_xattr_security_list,
5293 .get = ocfs2_xattr_security_get,
5294 .set = ocfs2_xattr_security_set,
5298 * 'trusted' attributes support
5300 static size_t ocfs2_xattr_trusted_list(struct inode *inode, char *list,
5301 size_t list_size, const char *name,
5304 const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN;
5305 const size_t total_len = prefix_len + name_len + 1;
5307 if (list && total_len <= list_size) {
5308 memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len);
5309 memcpy(list + prefix_len, name, name_len);
5310 list[prefix_len + name_len] = '\0';
5315 static int ocfs2_xattr_trusted_get(struct inode *inode, const char *name,
5316 void *buffer, size_t size)
5318 if (strcmp(name, "") == 0)
5320 return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_TRUSTED, name,
5324 static int ocfs2_xattr_trusted_set(struct inode *inode, const char *name,
5325 const void *value, size_t size, int flags)
5327 if (strcmp(name, "") == 0)
5330 return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_TRUSTED, name, value,
5334 struct xattr_handler ocfs2_xattr_trusted_handler = {
5335 .prefix = XATTR_TRUSTED_PREFIX,
5336 .list = ocfs2_xattr_trusted_list,
5337 .get = ocfs2_xattr_trusted_get,
5338 .set = ocfs2_xattr_trusted_set,
5342 * 'user' attributes support
5344 static size_t ocfs2_xattr_user_list(struct inode *inode, char *list,
5345 size_t list_size, const char *name,
5348 const size_t prefix_len = XATTR_USER_PREFIX_LEN;
5349 const size_t total_len = prefix_len + name_len + 1;
5350 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5352 if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
5355 if (list && total_len <= list_size) {
5356 memcpy(list, XATTR_USER_PREFIX, prefix_len);
5357 memcpy(list + prefix_len, name, name_len);
5358 list[prefix_len + name_len] = '\0';
5363 static int ocfs2_xattr_user_get(struct inode *inode, const char *name,
5364 void *buffer, size_t size)
5366 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5368 if (strcmp(name, "") == 0)
5370 if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
5372 return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_USER, name,
5376 static int ocfs2_xattr_user_set(struct inode *inode, const char *name,
5377 const void *value, size_t size, int flags)
5379 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5381 if (strcmp(name, "") == 0)
5383 if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
5386 return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_USER, name, value,
5390 struct xattr_handler ocfs2_xattr_user_handler = {
5391 .prefix = XATTR_USER_PREFIX,
5392 .list = ocfs2_xattr_user_list,
5393 .get = ocfs2_xattr_user_get,
5394 .set = ocfs2_xattr_user_set,