btrfs: add a btrfs_finish_ordered_extent helper

Add a helper to complete an ordered_extent without first doing a lookup.
The tracepoint cannot use the ordered_extent class as we also want to
print the range.
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/ordered-data.c

@@ -368,6 +368,25 @@ static void btrfs_queue_ordered_fn(struct btrfs_ordered_extent *ordered)
 	btrfs_queue_work(wq, &ordered->work);
 }
 
+bool btrfs_finish_ordered_extent(struct btrfs_ordered_extent *ordered,
+				 struct page *page, u64 file_offset, u64 len,
+				 bool uptodate)
+{
+	struct btrfs_inode *inode = BTRFS_I(ordered->inode);
+	unsigned long flags;
+	bool ret;
+
+	trace_btrfs_finish_ordered_extent(inode, file_offset, len, uptodate);
+
+	spin_lock_irqsave(&inode->ordered_tree.lock, flags);
+	ret = can_finish_ordered_extent(ordered, page, file_offset, len, uptodate);
+	spin_unlock_irqrestore(&inode->ordered_tree.lock, flags);
+
+	if (ret)
+		btrfs_queue_ordered_fn(ordered);
+	return ret;
+}
+
 /*
  * Mark all ordered extents io inside the specified range finished.
  *

fs/btrfs/ordered-data.h

@@ -167,6 +167,9 @@ int btrfs_finish_ordered_io(struct btrfs_ordered_extent *ordered_extent);
 void btrfs_put_ordered_extent(struct btrfs_ordered_extent *entry);
 void btrfs_remove_ordered_extent(struct btrfs_inode *btrfs_inode,
 				struct btrfs_ordered_extent *entry);
+bool btrfs_finish_ordered_extent(struct btrfs_ordered_extent *ordered,
+				 struct page *page, u64 file_offset, u64 len,
+				 bool uptodate);
 void btrfs_mark_ordered_io_finished(struct btrfs_inode *inode,
 				struct page *page, u64 file_offset,
 				u64 num_bytes, bool uptodate);

include/trace/events/btrfs.h

@@ -661,6 +661,35 @@ DEFINE_EVENT(btrfs__ordered_extent, btrfs_ordered_extent_mark_finished,
 	     TP_ARGS(inode, ordered)
 );
 
+TRACE_EVENT(btrfs_finish_ordered_extent,
+
+	TP_PROTO(const struct btrfs_inode *inode, u64 start, u64 len,
+		 bool uptodate),
+
+	TP_ARGS(inode, start, len, uptodate),
+
+	TP_STRUCT__entry_btrfs(
+		__field(	u64,	 ino		)
+		__field(	u64,	 start		)
+		__field(	u64,	 len		)
+		__field(	bool,	 uptodate	)
+		__field(	u64,	 root_objectid	)
+	),
+
+	TP_fast_assign_btrfs(inode->root->fs_info,
+		__entry->ino	= btrfs_ino(inode);
+		__entry->start	= start;
+		__entry->len	= len;
+		__entry->uptodate = uptodate;
+		__entry->root_objectid = inode->root->root_key.objectid;
+	),
+
+	TP_printk_btrfs("root=%llu(%s) ino=%llu start=%llu len=%llu uptodate=%d",
+		  show_root_type(__entry->root_objectid),
+		  __entry->ino, __entry->start,
+		  __entry->len, !!__entry->uptodate)
+);
+
 DECLARE_EVENT_CLASS(btrfs__writepage,
 
 	TP_PROTO(const struct page *page, const struct inode *inode,