54 	struct buffer_head *bh;  in ext4_append()  local
64 	bh = ext4_bread(handle, inode, *block, EXT4_GET_BLOCKS_CREATE);  in ext4_append()
65 	if (IS_ERR(bh))  in ext4_append()
66 		return bh;  in ext4_append()
69 	BUFFER_TRACE(bh, "get_write_access");  in ext4_append()
70 	err = ext4_journal_get_write_access(handle, bh);  in ext4_append()
72 		brelse(bh);  in ext4_append()
76 	return bh;  in ext4_append()
95 	struct buffer_head *bh;  in __ext4_read_dirblock()  local
99 	bh = ext4_bread(NULL, inode, block, 0);  in __ext4_read_dirblock()
100 	if (IS_ERR(bh)) {  in __ext4_read_dirblock()
105 			       current->comm, PTR_ERR(bh));  in __ext4_read_dirblock()
107 		return bh;  in __ext4_read_dirblock()
109 	if (!bh) {  in __ext4_read_dirblock()
114 	dirent = (struct ext4_dir_entry *) bh->b_data;  in __ext4_read_dirblock()
130 	    buffer_verified(bh))  in __ext4_read_dirblock()
131 		return bh;  in __ext4_read_dirblock()
140 			set_buffer_verified(bh);  in __ext4_read_dirblock()
144 			brelse(bh);  in __ext4_read_dirblock()
150 			set_buffer_verified(bh);  in __ext4_read_dirblock()
154 			brelse(bh);  in __ext4_read_dirblock()
158 	return bh;  in __ext4_read_dirblock()
224 	struct buffer_head *bh;  member
383 				  struct buffer_head *bh)  in ext4_handle_dirty_dirent_node()  argument
385 	ext4_dirent_csum_set(inode, (struct ext4_dir_entry *)bh->b_data);  in ext4_handle_dirty_dirent_node()
386 	return ext4_handle_dirty_metadata(handle, inode, bh);  in ext4_handle_dirty_dirent_node()
494 					    struct buffer_head *bh)  in ext4_handle_dirty_dx_node()  argument
496 	ext4_dx_csum_set(inode, (struct ext4_dir_entry *)bh->b_data);  in ext4_handle_dirty_dx_node()
497 	return ext4_handle_dirty_metadata(handle, inode, bh);  in ext4_handle_dirty_dx_node()
691 	struct buffer_head *bh;  in dx_show_entries()  local
700 		bh = ext4_bread(NULL,dir, block, 0);  in dx_show_entries()
701 		if (!bh || IS_ERR(bh))  in dx_show_entries()
704 		   dx_show_entries(hinfo, dir, ((struct dx_node *) bh->b_data)->entries, levels - 1):  in dx_show_entries()
706 			bh->b_data, blocksize, 0);  in dx_show_entries()
710 		brelse(bh);  in dx_show_entries()
740 	frame->bh = ext4_read_dirblock(dir, 0, INDEX);  in dx_probe()
741 	if (IS_ERR(frame->bh))  in dx_probe()
742 		return (struct dx_frame *) frame->bh;  in dx_probe()
744 	root = (struct dx_root *) frame->bh->b_data;  in dx_probe()
830 		frame->bh = ext4_read_dirblock(dir, dx_get_block(at), INDEX);  in dx_probe()
831 		if (IS_ERR(frame->bh)) {  in dx_probe()
832 			ret_err = (struct dx_frame *) frame->bh;  in dx_probe()
833 			frame->bh = NULL;  in dx_probe()
836 		entries = ((struct dx_node *) frame->bh->b_data)->entries;  in dx_probe()
847 		brelse(frame->bh);  in dx_probe()
859 	if (frames[0].bh == NULL)  in dx_release()
862 	if (((struct dx_root *)frames[0].bh->b_data)->info.indirect_levels)  in dx_release()
863 		brelse(frames[1].bh);  in dx_release()
864 	brelse(frames[0].bh);  in dx_release()
890 	struct buffer_head *bh;  in ext4_htree_next_block()  local
930 		bh = ext4_read_dirblock(dir, dx_get_block(p->at), INDEX);  in ext4_htree_next_block()
931 		if (IS_ERR(bh))  in ext4_htree_next_block()
932 			return PTR_ERR(bh);  in ext4_htree_next_block()
934 		brelse(p->bh);  in ext4_htree_next_block()
935 		p->bh = bh;  in ext4_htree_next_block()
936 		p->at = p->entries = ((struct dx_node *) bh->b_data)->entries;  in ext4_htree_next_block()
952 	struct buffer_head *bh;  in htree_dirblock_to_tree()  local
959 	bh = ext4_read_dirblock(dir, block, DIRENT);  in htree_dirblock_to_tree()
960 	if (IS_ERR(bh))  in htree_dirblock_to_tree()
961 		return PTR_ERR(bh);  in htree_dirblock_to_tree()
963 	de = (struct ext4_dir_entry_2 *) bh->b_data;  in htree_dirblock_to_tree()
972 			brelse(bh);  in htree_dirblock_to_tree()
978 			brelse(bh);  in htree_dirblock_to_tree()
984 		if (ext4_check_dir_entry(dir, NULL, de, bh,  in htree_dirblock_to_tree()
985 				bh->b_data, bh->b_size,  in htree_dirblock_to_tree()
987 					 + ((char *)de - bh->b_data))) {  in htree_dirblock_to_tree()
1026 	brelse(bh);  in htree_dirblock_to_tree()
1088 		de = (struct ext4_dir_entry_2 *) frames[0].bh->b_data;  in ext4_htree_fill_tree()
1098 		de = (struct ext4_dir_entry_2 *) frames[0].bh->b_data;  in ext4_htree_fill_tree()
1144 static inline int search_dirblock(struct buffer_head *bh,  in search_dirblock()  argument
1151 	return ext4_search_dir(bh, bh->b_data, dir->i_sb->s_blocksize, dir,  in search_dirblock()
1265 int ext4_search_dir(struct buffer_head *bh, char *search_buf, int buf_size,  in ext4_search_dir()  argument
1289 				if (ext4_check_dir_entry(dir, NULL, de, bh,  in ext4_search_dir()
1290 						bh->b_data,  in ext4_search_dir()
1291 						 bh->b_size, offset)) {  in ext4_search_dir()
1351 	struct buffer_head *bh, *ret = NULL;  in ext4_find_entry()  local
1431 				bh = ext4_getblk(NULL, dir, b++, 0);  in ext4_find_entry()
1432 				if (IS_ERR(bh)) {  in ext4_find_entry()
1434 						ret = bh;  in ext4_find_entry()
1439 				bh_use[ra_max] = bh;  in ext4_find_entry()
1440 				if (bh)  in ext4_find_entry()
1442 						    1, &bh);  in ext4_find_entry()
1445 		if ((bh = bh_use[ra_ptr++]) == NULL)  in ext4_find_entry()
1447 		wait_on_buffer(bh);  in ext4_find_entry()
1448 		if (!buffer_uptodate(bh)) {  in ext4_find_entry()
1452 			brelse(bh);  in ext4_find_entry()
1455 		if (!buffer_verified(bh) &&  in ext4_find_entry()
1457 					 (struct ext4_dir_entry *)bh->b_data) &&  in ext4_find_entry()
1459 				(struct ext4_dir_entry *)bh->b_data)) {  in ext4_find_entry()
1462 			brelse(bh);  in ext4_find_entry()
1465 		set_buffer_verified(bh);  in ext4_find_entry()
1466 		i = search_dirblock(bh, dir, &fname, d_name,  in ext4_find_entry()
1470 			ret = bh;  in ext4_find_entry()
1473 			brelse(bh);  in ext4_find_entry()
1508 	struct buffer_head *bh;  in ext4_dx_find_entry()  local
1520 		bh = ext4_read_dirblock(dir, block, DIRENT);  in ext4_dx_find_entry()
1521 		if (IS_ERR(bh))  in ext4_dx_find_entry()
1524 		retval = search_dirblock(bh, dir, fname, d_name,  in ext4_dx_find_entry()
1529 		brelse(bh);  in ext4_dx_find_entry()
1531 			bh = ERR_PTR(ERR_BAD_DX_DIR);  in ext4_dx_find_entry()
1542 			bh = ERR_PTR(retval);  in ext4_dx_find_entry()
1547 	bh = NULL;  in ext4_dx_find_entry()
1552 	return bh;  in ext4_dx_find_entry()
1559 	struct buffer_head *bh;  in ext4_lookup()  local
1564 	bh = ext4_find_entry(dir, &dentry->d_name, &de, NULL);  in ext4_lookup()
1565 	if (IS_ERR(bh))  in ext4_lookup()
1566 		return (struct dentry *) bh;  in ext4_lookup()
1568 	if (bh) {  in ext4_lookup()
1570 		brelse(bh);  in ext4_lookup()
1609 	struct buffer_head *bh;  in ext4_get_parent()  local
1611 	bh = ext4_find_entry(d_inode(child), &dotdot, &de, NULL);  in ext4_get_parent()
1612 	if (IS_ERR(bh))  in ext4_get_parent()
1613 		return (struct dentry *) bh;  in ext4_get_parent()
1614 	if (!bh)  in ext4_get_parent()
1617 	brelse(bh);  in ext4_get_parent()
1683 			struct buffer_head **bh,struct dx_frame *frame,  in do_split()  argument
1692 	char *data1 = (*bh)->b_data, *data2;  in do_split()
1704 		brelse(*bh);  in do_split()
1705 		*bh = NULL;  in do_split()
1709 	BUFFER_TRACE(*bh, "get_write_access");  in do_split()
1710 	err = ext4_journal_get_write_access(handle, *bh);  in do_split()
1714 	BUFFER_TRACE(frame->bh, "get_write_access");  in do_split()
1715 	err = ext4_journal_get_write_access(handle, frame->bh);  in do_split()
1770 		swap(*bh, bh2);  in do_split()
1777 	err = ext4_handle_dirty_dx_node(handle, dir, frame->bh);  in do_split()
1785 	brelse(*bh);  in do_split()
1787 	*bh = NULL;  in do_split()
1793 		      struct buffer_head *bh,  in ext4_find_dest_de()  argument
1808 		if (ext4_check_dir_entry(dir, NULL, de, bh,  in ext4_find_dest_de()
1876 			     struct buffer_head *bh)  in add_dirent_to_buf()  argument
1886 		err = ext4_find_dest_de(dir, inode, bh, bh->b_data,  in add_dirent_to_buf()
1891 	BUFFER_TRACE(bh, "get_write_access");  in add_dirent_to_buf()
1892 	err = ext4_journal_get_write_access(handle, bh);  in add_dirent_to_buf()
1919 	BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");  in add_dirent_to_buf()
1920 	err = ext4_handle_dirty_dirent_node(handle, dir, bh);  in add_dirent_to_buf()
1932 			    struct inode *inode, struct buffer_head *bh)  in make_indexed_dir()  argument
1954 	BUFFER_TRACE(bh, "get_write_access");  in make_indexed_dir()
1955 	retval = ext4_journal_get_write_access(handle, bh);  in make_indexed_dir()
1958 		brelse(bh);  in make_indexed_dir()
1961 	root = (struct dx_root *) bh->b_data;  in make_indexed_dir()
1969 		brelse(bh);  in make_indexed_dir()
1977 		brelse(bh);  in make_indexed_dir()
2020 	frame->bh = bh;  in make_indexed_dir()
2021 	bh = bh2;  in make_indexed_dir()
2023 	retval = ext4_handle_dirty_dx_node(handle, dir, frame->bh);  in make_indexed_dir()
2026 	retval = ext4_handle_dirty_dirent_node(handle, dir, bh);  in make_indexed_dir()
2030 	de = do_split(handle,dir, &bh, frame, &fname->hinfo);  in make_indexed_dir()
2037 	retval = add_dirent_to_buf(handle, fname, dir, inode, de, bh);  in make_indexed_dir()
2038 	brelse(bh);  in make_indexed_dir()
2065 	struct buffer_head *bh = NULL;  in ext4_add_entry()  local
2109 		bh = ext4_read_dirblock(dir, block, DIRENT);  in ext4_add_entry()
2110 		if (IS_ERR(bh)) {  in ext4_add_entry()
2111 			retval = PTR_ERR(bh);  in ext4_add_entry()
2112 			bh = NULL;  in ext4_add_entry()
2116 					   NULL, bh);  in ext4_add_entry()
2123 						  inode, bh);  in ext4_add_entry()
2124 			bh = NULL; /* make_indexed_dir releases bh */  in ext4_add_entry()
2127 		brelse(bh);  in ext4_add_entry()
2129 	bh = ext4_append(handle, dir, &block);  in ext4_add_entry()
2130 	if (IS_ERR(bh)) {  in ext4_add_entry()
2131 		retval = PTR_ERR(bh);  in ext4_add_entry()
2132 		bh = NULL;  in ext4_add_entry()
2135 	de = (struct ext4_dir_entry_2 *) bh->b_data;  in ext4_add_entry()
2140 		t = EXT4_DIRENT_TAIL(bh->b_data, blocksize);  in ext4_add_entry()
2144 	retval = add_dirent_to_buf(handle, &fname, dir, inode, de, bh);  in ext4_add_entry()
2147 	brelse(bh);  in ext4_add_entry()
2161 	struct buffer_head *bh;  in ext4_dx_add_entry()  local
2172 	bh = ext4_read_dirblock(dir, dx_get_block(frame->at), DIRENT);  in ext4_dx_add_entry()
2173 	if (IS_ERR(bh)) {  in ext4_dx_add_entry()
2174 		err = PTR_ERR(bh);  in ext4_dx_add_entry()
2175 		bh = NULL;  in ext4_dx_add_entry()
2179 	BUFFER_TRACE(bh, "get_write_access");  in ext4_dx_add_entry()
2180 	err = ext4_journal_get_write_access(handle, bh);  in ext4_dx_add_entry()
2184 	err = add_dirent_to_buf(handle, fname, dir, inode, NULL, bh);  in ext4_dx_add_entry()
2216 		BUFFER_TRACE(frame->bh, "get_write_access");  in ext4_dx_add_entry()
2217 		err = ext4_journal_get_write_access(handle, frame->bh);  in ext4_dx_add_entry()
2226 			BUFFER_TRACE(frame->bh, "get_write_access"); /* index root */  in ext4_dx_add_entry()
2228 							     frames[0].bh);  in ext4_dx_add_entry()
2242 				swap(frame->bh, bh2);  in ext4_dx_add_entry()
2262 			((struct dx_root *) frames[0].bh->b_data)->info.indirect_levels = 1;  in ext4_dx_add_entry()
2268 			frame->bh = bh2;  in ext4_dx_add_entry()
2270 							     frame->bh);  in ext4_dx_add_entry()
2274 		err = ext4_handle_dirty_dx_node(handle, dir, frames[0].bh);  in ext4_dx_add_entry()
2280 	de = do_split(handle, dir, &bh, frame, &fname->hinfo);  in ext4_dx_add_entry()
2285 	err = add_dirent_to_buf(handle, fname, dir, inode, de, bh);  in ext4_dx_add_entry()
2291 	brelse(bh);  in ext4_dx_add_entry()
2303 			      struct buffer_head *bh,  in ext4_generic_delete_entry()  argument
2316 		if (ext4_check_dir_entry(dir, NULL, de, bh,  in ext4_generic_delete_entry()
2317 					 bh->b_data, bh->b_size, i))  in ext4_generic_delete_entry()
2342 			     struct buffer_head *bh)  in ext4_delete_entry()  argument
2348 		err = ext4_delete_inline_entry(handle, dir, de_del, bh,  in ext4_delete_entry()
2357 	BUFFER_TRACE(bh, "get_write_access");  in ext4_delete_entry()
2358 	err = ext4_journal_get_write_access(handle, bh);  in ext4_delete_entry()
2363 					bh, bh->b_data,  in ext4_delete_entry()
2368 	BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");  in ext4_delete_entry()
2369 	err = ext4_handle_dirty_dirent_node(handle, dir, bh);  in ext4_delete_entry()
2672 	struct buffer_head *bh;  in ext4_empty_dir()  local
2690 	bh = ext4_read_dirblock(inode, 0, EITHER);  in ext4_empty_dir()
2691 	if (IS_ERR(bh))  in ext4_empty_dir()
2694 	de = (struct ext4_dir_entry_2 *) bh->b_data;  in ext4_empty_dir()
2700 		brelse(bh);  in ext4_empty_dir()
2707 		if ((void *) de >= (void *) (bh->b_data+sb->s_blocksize)) {  in ext4_empty_dir()
2710 			brelse(bh);  in ext4_empty_dir()
2712 			bh = ext4_read_dirblock(inode, lblock, EITHER);  in ext4_empty_dir()
2713 			if (IS_ERR(bh))  in ext4_empty_dir()
2715 			de = (struct ext4_dir_entry_2 *) bh->b_data;  in ext4_empty_dir()
2717 		if (ext4_check_dir_entry(inode, NULL, de, bh,  in ext4_empty_dir()
2718 					 bh->b_data, bh->b_size, offset)) {  in ext4_empty_dir()
2719 			de = (struct ext4_dir_entry_2 *)(bh->b_data +  in ext4_empty_dir()
2725 			brelse(bh);  in ext4_empty_dir()
2731 	brelse(bh);  in ext4_empty_dir()
2903 	brelse(iloc.bh);  in ext4_orphan_del()
2911 	struct buffer_head *bh;  in ext4_rmdir()  local
2925 	bh = ext4_find_entry(dir, &dentry->d_name, &de, NULL);  in ext4_rmdir()
2926 	if (IS_ERR(bh))  in ext4_rmdir()
2927 		return PTR_ERR(bh);  in ext4_rmdir()
2928 	if (!bh)  in ext4_rmdir()
2952 	retval = ext4_delete_entry(handle, dir, de, bh);  in ext4_rmdir()
2974 	brelse(bh);  in ext4_rmdir()
2984 	struct buffer_head *bh;  in ext4_unlink()  local
2999 	bh = ext4_find_entry(dir, &dentry->d_name, &de, NULL);  in ext4_unlink()
3000 	if (IS_ERR(bh))  in ext4_unlink()
3001 		return PTR_ERR(bh);  in ext4_unlink()
3002 	if (!bh)  in ext4_unlink()
3027 	retval = ext4_delete_entry(handle, dir, de, bh);  in ext4_unlink()
3040 	brelse(bh);  in ext4_unlink()
3263 	struct buffer_head *bh;  in ext4_get_first_dir_block()  local
3266 		bh = ext4_read_dirblock(inode, 0, EITHER);  in ext4_get_first_dir_block()
3267 		if (IS_ERR(bh)) {  in ext4_get_first_dir_block()
3268 			*retval = PTR_ERR(bh);  in ext4_get_first_dir_block()
3272 					(struct ext4_dir_entry_2 *)bh->b_data,  in ext4_get_first_dir_block()
3274 		return bh;  in ext4_get_first_dir_block()
3289 	struct buffer_head *bh;  member
3346 	BUFFER_TRACE(ent->bh, "get write access");  in ext4_setent()
3347 	retval = ext4_journal_get_write_access(handle, ent->bh);  in ext4_setent()
3357 	BUFFER_TRACE(ent->bh, "call ext4_handle_dirty_metadata");  in ext4_setent()
3360 						       ent->dir, ent->bh);  in ext4_setent()
3366 	brelse(ent->bh);  in ext4_setent()
3367 	ent->bh = NULL;  in ext4_setent()
3376 	struct buffer_head *bh;  in ext4_find_delete_entry()  local
3379 	bh = ext4_find_entry(dir, d_name, &de, NULL);  in ext4_find_delete_entry()
3380 	if (IS_ERR(bh))  in ext4_find_delete_entry()
3381 		return PTR_ERR(bh);  in ext4_find_delete_entry()
3382 	if (bh) {  in ext4_find_delete_entry()
3383 		retval = ext4_delete_entry(handle, dir, de, bh);  in ext4_find_delete_entry()
3384 		brelse(bh);  in ext4_find_delete_entry()
3407 		retval = ext4_delete_entry(handle, ent->dir, ent->de, ent->bh);  in ext4_rename_delete()
3509 	old.bh = ext4_find_entry(old.dir, &old.dentry->d_name, &old.de, NULL);  in ext4_rename()
3510 	if (IS_ERR(old.bh))  in ext4_rename()
3511 		return PTR_ERR(old.bh);  in ext4_rename()
3519 	if (!old.bh || le32_to_cpu(old.de->inode) != old.inode->i_ino)  in ext4_rename()
3530 	new.bh = ext4_find_entry(new.dir, &new.dentry->d_name,  in ext4_rename()
3532 	if (IS_ERR(new.bh)) {  in ext4_rename()
3533 		retval = PTR_ERR(new.bh);  in ext4_rename()
3534 		new.bh = NULL;  in ext4_rename()
3537 	if (new.bh) {  in ext4_rename()
3539 			brelse(new.bh);  in ext4_rename()
3540 			new.bh = NULL;  in ext4_rename()
3603 	if (!new.bh) {  in ext4_rename()
3664 	brelse(old.bh);  in ext4_rename()
3665 	brelse(new.bh);  in ext4_rename()
3710 	old.bh = ext4_find_entry(old.dir, &old.dentry->d_name,  in ext4_cross_rename()
3712 	if (IS_ERR(old.bh))  in ext4_cross_rename()
3713 		return PTR_ERR(old.bh);  in ext4_cross_rename()
3721 	if (!old.bh || le32_to_cpu(old.de->inode) != old.inode->i_ino)  in ext4_cross_rename()
3724 	new.bh = ext4_find_entry(new.dir, &new.dentry->d_name,  in ext4_cross_rename()
3726 	if (IS_ERR(new.bh)) {  in ext4_cross_rename()
3727 		retval = PTR_ERR(new.bh);  in ext4_cross_rename()
3728 		new.bh = NULL;  in ext4_cross_rename()
3733 	if (!new.bh || le32_to_cpu(new.de->inode) != new.inode->i_ino)  in ext4_cross_rename()
3809 	brelse(old.bh);  in ext4_cross_rename()
3810 	brelse(new.bh);  in ext4_cross_rename()