69 #define HDR(bh) ((struct ext2_xattr_header *)((bh)->b_data))  argument
71 #define FIRST_ENTRY(bh) ENTRY(HDR(bh)+1)  argument
81 # define ea_bdebug(bh, f...) do { \  argument
83 			bh->b_bdev, (unsigned long) bh->b_blocknr); \
89 # define ea_bdebug(bh, f...)	no_printk(f)  argument
199 	struct buffer_head *bh = NULL;  in ext2_xattr_get()  local
220 	bh = sb_bread(inode->i_sb, EXT2_I(inode)->i_file_acl);  in ext2_xattr_get()
222 	if (!bh)  in ext2_xattr_get()
224 	ea_bdebug(bh, "b_count=%d, refcount=%d",  in ext2_xattr_get()
225 		atomic_read(&(bh->b_count)), le32_to_cpu(HDR(bh)->h_refcount));  in ext2_xattr_get()
226 	end = bh->b_data + bh->b_size;  in ext2_xattr_get()
227 	if (!ext2_xattr_header_valid(HDR(bh))) {  in ext2_xattr_get()
237 	entry = FIRST_ENTRY(bh);  in ext2_xattr_get()
252 	if (ext2_xattr_cache_insert(ea_block_cache, bh))  in ext2_xattr_get()
258 	if (ext2_xattr_cache_insert(ea_block_cache, bh))  in ext2_xattr_get()
265 		memcpy(buffer, bh->b_data + le16_to_cpu(entry->e_value_offs),  in ext2_xattr_get()
271 	brelse(bh);  in ext2_xattr_get()
291 	struct buffer_head *bh = NULL;  in ext2_xattr_list()  local
306 	bh = sb_bread(inode->i_sb, EXT2_I(inode)->i_file_acl);  in ext2_xattr_list()
308 	if (!bh)  in ext2_xattr_list()
310 	ea_bdebug(bh, "b_count=%d, refcount=%d",  in ext2_xattr_list()
311 		atomic_read(&(bh->b_count)), le32_to_cpu(HDR(bh)->h_refcount));  in ext2_xattr_list()
312 	end = bh->b_data + bh->b_size;  in ext2_xattr_list()
313 	if (!ext2_xattr_header_valid(HDR(bh))) {  in ext2_xattr_list()
323 	entry = FIRST_ENTRY(bh);  in ext2_xattr_list()
330 	if (ext2_xattr_cache_insert(ea_block_cache, bh))  in ext2_xattr_list()
334 	for (entry = FIRST_ENTRY(bh); !IS_LAST_ENTRY(entry);  in ext2_xattr_list()
361 	brelse(bh);  in ext2_xattr_list()
411 	struct buffer_head *bh = NULL;  in ext2_xattr_set()  local
446 		bh = sb_bread(sb, EXT2_I(inode)->i_file_acl);  in ext2_xattr_set()
448 		if (!bh)  in ext2_xattr_set()
450 		ea_bdebug(bh, "b_count=%d, refcount=%d",  in ext2_xattr_set()
451 			atomic_read(&(bh->b_count)),  in ext2_xattr_set()
452 			le32_to_cpu(HDR(bh)->h_refcount));  in ext2_xattr_set()
453 		header = HDR(bh);  in ext2_xattr_set()
454 		end = bh->b_data + bh->b_size;  in ext2_xattr_set()
468 		last = FIRST_ENTRY(bh);  in ext2_xattr_set()
522 		lock_buffer(bh);  in ext2_xattr_set()
528 					hash, bh->b_blocknr);  in ext2_xattr_set()
530 				ea_bdebug(bh, "modifying in-place");  in ext2_xattr_set()
538 		unlock_buffer(bh);  in ext2_xattr_set()
539 		ea_bdebug(bh, "cloning");  in ext2_xattr_set()
540 		header = kmemdup(HDR(bh), bh->b_size, GFP_KERNEL);  in ext2_xattr_set()
546 		offset = (char *)here - bh->b_data;  in ext2_xattr_set()
548 		offset = (char *)last - bh->b_data;  in ext2_xattr_set()
636 		if (bh && header == HDR(bh))  in ext2_xattr_set()
637 			unlock_buffer(bh);  /* we were modifying in-place. */  in ext2_xattr_set()
638 		error = ext2_xattr_set2(inode, bh, NULL);  in ext2_xattr_set()
641 		if (bh && header == HDR(bh))  in ext2_xattr_set()
642 			unlock_buffer(bh);  /* we were modifying in-place. */  in ext2_xattr_set()
643 		error = ext2_xattr_set2(inode, bh, header);  in ext2_xattr_set()
647 	if (!(bh && header == HDR(bh)))  in ext2_xattr_set()
649 	brelse(bh);  in ext2_xattr_set()
656 				     struct buffer_head *bh)  in ext2_xattr_release_block()  argument
661 	lock_buffer(bh);  in ext2_xattr_release_block()
662 	if (HDR(bh)->h_refcount == cpu_to_le32(1)) {  in ext2_xattr_release_block()
663 		__u32 hash = le32_to_cpu(HDR(bh)->h_hash);  in ext2_xattr_release_block()
671 						  bh->b_blocknr);  in ext2_xattr_release_block()
677 			unlock_buffer(bh);  in ext2_xattr_release_block()
684 		ea_bdebug(bh, "freeing");  in ext2_xattr_release_block()
685 		ext2_free_blocks(inode, bh->b_blocknr, 1);  in ext2_xattr_release_block()
688 		get_bh(bh);  in ext2_xattr_release_block()
689 		bforget(bh);  in ext2_xattr_release_block()
690 		unlock_buffer(bh);  in ext2_xattr_release_block()
693 		le32_add_cpu(&HDR(bh)->h_refcount, -1);  in ext2_xattr_release_block()
695 		mark_buffer_dirty(bh);  in ext2_xattr_release_block()
696 		unlock_buffer(bh);  in ext2_xattr_release_block()
697 		ea_bdebug(bh, "refcount now=%d",  in ext2_xattr_release_block()
698 			le32_to_cpu(HDR(bh)->h_refcount));  in ext2_xattr_release_block()
700 			sync_dirty_buffer(bh);  in ext2_xattr_release_block()
818 	struct buffer_head *bh = NULL;  in ext2_xattr_delete_inode()  local
840 	bh = sb_bread(inode->i_sb, EXT2_I(inode)->i_file_acl);  in ext2_xattr_delete_inode()
841 	if (!bh) {  in ext2_xattr_delete_inode()
847 	ea_bdebug(bh, "b_count=%d", atomic_read(&(bh->b_count)));  in ext2_xattr_delete_inode()
848 	if (!ext2_xattr_header_valid(HDR(bh))) {  in ext2_xattr_delete_inode()
854 	ext2_xattr_release_block(inode, bh);  in ext2_xattr_delete_inode()
858 	brelse(bh);  in ext2_xattr_delete_inode()
871 ext2_xattr_cache_insert(struct mb_cache *cache, struct buffer_head *bh)  in ext2_xattr_cache_insert()  argument
873 	__u32 hash = le32_to_cpu(HDR(bh)->h_hash);  in ext2_xattr_cache_insert()
876 	error = mb_cache_entry_create(cache, GFP_NOFS, hash, bh->b_blocknr,  in ext2_xattr_cache_insert()
880 			ea_bdebug(bh, "already in cache");  in ext2_xattr_cache_insert()
884 		ea_bdebug(bh, "inserting [%x]", (int)hash);  in ext2_xattr_cache_insert()
949 		struct buffer_head *bh;  in ext2_xattr_cache_find()  local
951 		bh = sb_bread(inode->i_sb, ce->e_value);  in ext2_xattr_cache_find()
952 		if (!bh) {  in ext2_xattr_cache_find()
957 			lock_buffer(bh);  in ext2_xattr_cache_find()
958 			if (le32_to_cpu(HDR(bh)->h_refcount) >  in ext2_xattr_cache_find()
962 					  le32_to_cpu(HDR(bh)->h_refcount),  in ext2_xattr_cache_find()
964 			} else if (!ext2_xattr_cmp(header, HDR(bh))) {  in ext2_xattr_cache_find()
965 				ea_bdebug(bh, "b_count=%d",  in ext2_xattr_cache_find()
966 					  atomic_read(&(bh->b_count)));  in ext2_xattr_cache_find()
969 				return bh;  in ext2_xattr_cache_find()
971 			unlock_buffer(bh);  in ext2_xattr_cache_find()
972 			brelse(bh);  in ext2_xattr_cache_find()