972  * This function locks the extent and properly waits for data=ordered extents
998 		struct btrfs_ordered_extent *ordered;  in lock_and_cleanup_extent_if_need()  local
1015 		ordered = btrfs_lookup_ordered_range(inode, start_pos,  in lock_and_cleanup_extent_if_need()
1017 		if (ordered &&  in lock_and_cleanup_extent_if_need()
1018 		    ordered->file_offset + ordered->num_bytes > start_pos &&  in lock_and_cleanup_extent_if_need()
1019 		    ordered->file_offset <= last_pos) {  in lock_and_cleanup_extent_if_need()
1026 			btrfs_start_ordered_extent(ordered);  in lock_and_cleanup_extent_if_need()
1027 			btrfs_put_ordered_extent(ordered);  in lock_and_cleanup_extent_if_need()
1030 		if (ordered)  in lock_and_cleanup_extent_if_need()
1031 			btrfs_put_ordered_extent(ordered);  in lock_and_cleanup_extent_if_need()
1055  * This function will flush ordered extents in the range to ensure proper
1531 	 * an ordered extent, and after that it will fault in the pages that the  in btrfs_direct_write()
1534 	 * find that ordered extent and then wait for it to complete (at  in btrfs_direct_write()
1536 	 * obviously the ordered extent can never complete as we didn't submit  in btrfs_direct_write()
1763 	 * update the last_trans of the inode during ordered extent completion,  in skip_inode_logging()
1779  * It needs to call filemap_fdatawait so that all ordered extent updates are
1806 	 * races between hole detection during logging and completion of ordered  in btrfs_sync_file()
1807 	 * extents outside the range, to missing checksums due to ordered extents  in btrfs_sync_file()
1844 	 * wait for all ordered extents to complete below.  in btrfs_sync_file()
1867 	 * For a full fsync we wait for the ordered extents to complete while  in btrfs_sync_file()
1869 	 * attach the ordered extents to the transaction so that a transaction  in btrfs_sync_file()
1871 	 * the current transaction commits before the ordered extents complete  in btrfs_sync_file()
1875 	 * logical address recorded in the ordered extent may change. We need  in btrfs_sync_file()
1882 		 * Get our ordered extents as soon as possible to avoid doing  in btrfs_sync_file()
1884 		 * checksums attached to the ordered extents.  in btrfs_sync_file()
1905 		 * An ordered extent might have started before and completed  in btrfs_sync_file()
1971 	 * the ordered extents, start it again and commit the transaction.  If  in btrfs_sync_file()
1972 	 * we attempt to wait on the ordered extents here we could deadlock with  in btrfs_sync_file()
1988 		 * making sure the transaction that had the ordered extents is  in btrfs_sync_file()
2218 		 * We can't have ordered extents in the range, nor dirty/writeback  in btrfs_punch_hole_lock_range()
2222 		 * for any ordered extents in the range to complete.  in btrfs_punch_hole_lock_range()
3106 	 * all ordered extents in the range to complete. After this we can lock  in btrfs_fallocate()
3108 	 * can't be more delalloc or ordered extents in the range.  in btrfs_fallocate()
3266 			/* Else trim our search range for ordered extents. */  in find_delalloc_subrange()
3276 	 * Now also check if there's any ordered extent in the range.  in find_delalloc_subrange()
3281 	 *    an ordered extent for the write. So we might just have been called  in find_delalloc_subrange()
3282 	 *    after delalloc is flushed and before the ordered extent completes  in find_delalloc_subrange()
3285 	 * 2) We may have an ordered extent created by flushing delalloc for a  in find_delalloc_subrange()
3290 	 * being flushed, but using the ordered extents tree is more efficient  in find_delalloc_subrange()
3291 	 * because it's usually much smaller as ordered extents are removed from  in find_delalloc_subrange()
3300 	/* The ordered extent may span beyond our search range. */  in find_delalloc_subrange()
3306 	/* Don't have unflushed delalloc, return the ordered extent range. */  in find_delalloc_subrange()
3314 	 * We have both unflushed delalloc (io_tree) and an ordered extent.  in find_delalloc_subrange()
3773 	 * our own ordered extent). This is because for direct IO reads,  in btrfs_direct_read()
3859 	 * from there.  We have to do this otherwise we'll miss the ordered  in btrfs_fdatawrite_range()