fs/btrfs/extent_io.c

95  * how many bytes are there before stripe/ordered extent boundary.
489 		btrfs_finish_ordered_extent(bbio->ordered,
772 	/* Limit data write bios to the ordered boundary. */
774 		struct btrfs_ordered_extent *ordered;
776 		ordered = btrfs_lookup_ordered_extent(inode, file_offset);
777 		if (ordered) {
779 					ordered->file_offset +
780 					ordered->disk_num_bytes - file_offset);
781 			bbio->ordered = ordered;
829 		/* Cap to the current ordered extent boundary if there is one. */
852 		 * our ordered extent for writes into zoned devices.
854 		 * When len_to_oe_boundary is tracking an ordered extent, we
855 		 * trust the ordered extent code to align things properly, and
856 		 * the check above to cap our write to the ordered extent
864 		 * unless we're using it to track an ordered extent.
1351 			 * causing writeback without ordered extent.
2050 	 * We have to hold onto the inode so that ordered extents can do their
2052 	 * an ordered extent if the igrab() fails there and that is a huge pain
2186  * already been ran (aka, ordered extent inserted) and all pages are still
2345 		 * The delalloc new bit will be cleared by ordered extent
2475  *   ordered extent completion, which is needed in order to reliably detect
2561 	 * without FIEMAP_FLAG_SYNC and there are ordered extents completing
2568 	 * btrfs_next_leaf() releases the path, there's an ordered extent that
2584 	 * flushed and the resulting ordered extents were completed, so we can
2611 			 * due to an ordered extent completing.
3292 	 * waiting for an ordered extent that in order to complete needs to