fs/btrfs/direct-io.c

17 	struct btrfs_ordered_extent *ordered;
40 	struct btrfs_ordered_extent *ordered;
63 		 * doing DIO to, so we need to make sure there's no ordered
66 		ordered = btrfs_lookup_ordered_range(BTRFS_I(inode), lockstart,
76 		if (!ordered &&
83 		if (ordered) {
85 				btrfs_put_ordered_extent(ordered);
90 			 * If we are doing a DIO read and the ordered extent we
96 			 * created an ordered extent for a previous extent map
105 			    test_bit(BTRFS_ORDERED_DIRECT, &ordered->flags))
106 				btrfs_start_ordered_extent(ordered);
109 			btrfs_put_ordered_extent(ordered);
118 			 * ordered dio extent we created before but did not have
121 			 * ordered extent to complete while holding a lock on
145 	struct btrfs_ordered_extent *ordered;
153 	ordered = btrfs_alloc_ordered_extent(inode, start, file_extent,
156 	if (IS_ERR(ordered)) {
162 		em = ERR_CAST(ordered);
164 		ASSERT(!dio_data->ordered);
165 		dio_data->ordered = ordered;
333 	 * We have created our ordered extent, so we can now release our reservation
626 			btrfs_finish_ordered_extent(dio_data->ordered, NULL,
634 		btrfs_put_ordered_extent(dio_data->ordered);
635 		dio_data->ordered = NULL;
658 		btrfs_finish_ordered_extent(bbio->ordered, NULL,
671 					struct btrfs_ordered_extent *ordered)
678 	/* Must always be called for the beginning of an ordered extent. */
679 	if (WARN_ON_ONCE(start != ordered->disk_bytenr))
682 	/* No need to split if the ordered extent covers the entire bio. */
683 	if (ordered->disk_num_bytes == len) {
684 		refcount_inc(&ordered->refs);
685 		bbio->ordered = ordered;
693 	if (!test_bit(BTRFS_ORDERED_NOCOW, &ordered->flags)) {
695 					     ordered->num_bytes, len,
696 					     ordered->disk_bytenr);
701 	new = btrfs_split_ordered_extent(ordered, len);
704 	bbio->ordered = new;
728 	 * the ordered extent to match the submitted bio.  Hang on to the
731 	 * remaining pages is blocked on the outstanding ordered extent.
736 		ret = btrfs_extract_ordered_extent(bbio, dio_data->ordered);
738 			btrfs_finish_ordered_extent(dio_data->ordered, NULL,
879 	 * an ordered extent, and after that it will fault in the pages that the
882 	 * find that ordered extent and then wait for it to complete (at
884 	 * obviously the ordered extent can never complete as we didn't submit
1041 	 * our own ordered extent). This is because for direct IO reads,