68 #define HDR(bh) ((struct ext2_xattr_header *)((bh)->b_data))  argument
70 #define FIRST_ENTRY(bh) ENTRY(HDR(bh)+1)  argument
80 # define ea_bdebug(bh, f...) do { \  argument
82 			bh->b_bdev, (unsigned long) bh->b_blocknr); \
198 	struct buffer_head *bh = NULL;  in ext2_xattr_get()  local
219 	bh = sb_bread(inode->i_sb, EXT2_I(inode)->i_file_acl);  in ext2_xattr_get()
221 	if (!bh)  in ext2_xattr_get()
223 	ea_bdebug(bh, "b_count=%d, refcount=%d",  in ext2_xattr_get()
224 		atomic_read(&(bh->b_count)), le32_to_cpu(HDR(bh)->h_refcount));  in ext2_xattr_get()
225 	end = bh->b_data + bh->b_size;  in ext2_xattr_get()
226 	if (!ext2_xattr_header_valid(HDR(bh))) {  in ext2_xattr_get()
236 	entry = FIRST_ENTRY(bh);  in ext2_xattr_get()
251 	if (ext2_xattr_cache_insert(ea_block_cache, bh))  in ext2_xattr_get()
257 	if (ext2_xattr_cache_insert(ea_block_cache, bh))  in ext2_xattr_get()
264 		memcpy(buffer, bh->b_data + le16_to_cpu(entry->e_value_offs),  in ext2_xattr_get()
270 	brelse(bh);  in ext2_xattr_get()
290 	struct buffer_head *bh = NULL;  in ext2_xattr_list()  local
305 	bh = sb_bread(inode->i_sb, EXT2_I(inode)->i_file_acl);  in ext2_xattr_list()
307 	if (!bh)  in ext2_xattr_list()
309 	ea_bdebug(bh, "b_count=%d, refcount=%d",  in ext2_xattr_list()
310 		atomic_read(&(bh->b_count)), le32_to_cpu(HDR(bh)->h_refcount));  in ext2_xattr_list()
311 	end = bh->b_data + bh->b_size;  in ext2_xattr_list()
312 	if (!ext2_xattr_header_valid(HDR(bh))) {  in ext2_xattr_list()
322 	entry = FIRST_ENTRY(bh);  in ext2_xattr_list()
329 	if (ext2_xattr_cache_insert(ea_block_cache, bh))  in ext2_xattr_list()
333 	for (entry = FIRST_ENTRY(bh); !IS_LAST_ENTRY(entry);  in ext2_xattr_list()
360 	brelse(bh);  in ext2_xattr_list()
410 	struct buffer_head *bh = NULL;  in ext2_xattr_set()  local
442 		bh = sb_bread(sb, EXT2_I(inode)->i_file_acl);  in ext2_xattr_set()
444 		if (!bh)  in ext2_xattr_set()
446 		ea_bdebug(bh, "b_count=%d, refcount=%d",  in ext2_xattr_set()
447 			atomic_read(&(bh->b_count)),  in ext2_xattr_set()
448 			le32_to_cpu(HDR(bh)->h_refcount));  in ext2_xattr_set()
449 		header = HDR(bh);  in ext2_xattr_set()
450 		end = bh->b_data + bh->b_size;  in ext2_xattr_set()
464 		last = FIRST_ENTRY(bh);  in ext2_xattr_set()
517 		lock_buffer(bh);  in ext2_xattr_set()
521 			ea_bdebug(bh, "modifying in-place");  in ext2_xattr_set()
527 					      bh->b_blocknr);  in ext2_xattr_set()
533 			unlock_buffer(bh);  in ext2_xattr_set()
534 			ea_bdebug(bh, "cloning");  in ext2_xattr_set()
535 			header = kmemdup(HDR(bh), bh->b_size, GFP_KERNEL);  in ext2_xattr_set()
541 			offset = (char *)here - bh->b_data;  in ext2_xattr_set()
543 			offset = (char *)last - bh->b_data;  in ext2_xattr_set()
630 		if (bh && header == HDR(bh))  in ext2_xattr_set()
631 			unlock_buffer(bh);  /* we were modifying in-place. */  in ext2_xattr_set()
632 		error = ext2_xattr_set2(inode, bh, NULL);  in ext2_xattr_set()
635 		if (bh && header == HDR(bh))  in ext2_xattr_set()
636 			unlock_buffer(bh);  /* we were modifying in-place. */  in ext2_xattr_set()
637 		error = ext2_xattr_set2(inode, bh, header);  in ext2_xattr_set()
641 	if (!(bh && header == HDR(bh)))  in ext2_xattr_set()
643 	brelse(bh);  in ext2_xattr_set()
790 	struct buffer_head *bh = NULL;  in ext2_xattr_delete_inode()  local
804 	bh = sb_bread(inode->i_sb, EXT2_I(inode)->i_file_acl);  in ext2_xattr_delete_inode()
805 	if (!bh) {  in ext2_xattr_delete_inode()
811 	ea_bdebug(bh, "b_count=%d", atomic_read(&(bh->b_count)));  in ext2_xattr_delete_inode()
812 	if (!ext2_xattr_header_valid(HDR(bh))) {  in ext2_xattr_delete_inode()
818 	lock_buffer(bh);  in ext2_xattr_delete_inode()
819 	if (HDR(bh)->h_refcount == cpu_to_le32(1)) {  in ext2_xattr_delete_inode()
820 		__u32 hash = le32_to_cpu(HDR(bh)->h_hash);  in ext2_xattr_delete_inode()
827 				      bh->b_blocknr);  in ext2_xattr_delete_inode()
829 		get_bh(bh);  in ext2_xattr_delete_inode()
830 		bforget(bh);  in ext2_xattr_delete_inode()
831 		unlock_buffer(bh);  in ext2_xattr_delete_inode()
833 		le32_add_cpu(&HDR(bh)->h_refcount, -1);  in ext2_xattr_delete_inode()
834 		ea_bdebug(bh, "refcount now=%d",  in ext2_xattr_delete_inode()
835 			le32_to_cpu(HDR(bh)->h_refcount));  in ext2_xattr_delete_inode()
836 		unlock_buffer(bh);  in ext2_xattr_delete_inode()
837 		mark_buffer_dirty(bh);  in ext2_xattr_delete_inode()
839 			sync_dirty_buffer(bh);  in ext2_xattr_delete_inode()
845 	brelse(bh);  in ext2_xattr_delete_inode()
858 ext2_xattr_cache_insert(struct mb_cache *cache, struct buffer_head *bh)  in ext2_xattr_cache_insert()  argument
860 	__u32 hash = le32_to_cpu(HDR(bh)->h_hash);  in ext2_xattr_cache_insert()
863 	error = mb_cache_entry_create(cache, GFP_NOFS, hash, bh->b_blocknr,  in ext2_xattr_cache_insert()
867 			ea_bdebug(bh, "already in cache (%d cache entries)",  in ext2_xattr_cache_insert()
872 		ea_bdebug(bh, "inserting [%x]", (int)hash);  in ext2_xattr_cache_insert()
937 		struct buffer_head *bh;  in ext2_xattr_cache_find()  local
939 		bh = sb_bread(inode->i_sb, ce->e_value);  in ext2_xattr_cache_find()
940 		if (!bh) {  in ext2_xattr_cache_find()
945 			lock_buffer(bh);  in ext2_xattr_cache_find()
957 				unlock_buffer(bh);  in ext2_xattr_cache_find()
958 				brelse(bh);  in ext2_xattr_cache_find()
960 			} else if (le32_to_cpu(HDR(bh)->h_refcount) >  in ext2_xattr_cache_find()
964 					  le32_to_cpu(HDR(bh)->h_refcount),  in ext2_xattr_cache_find()
966 			} else if (!ext2_xattr_cmp(header, HDR(bh))) {  in ext2_xattr_cache_find()
967 				ea_bdebug(bh, "b_count=%d",  in ext2_xattr_cache_find()
968 					  atomic_read(&(bh->b_count)));  in ext2_xattr_cache_find()
971 				return bh;  in ext2_xattr_cache_find()
973 			unlock_buffer(bh);  in ext2_xattr_cache_find()
974 			brelse(bh);  in ext2_xattr_cache_find()