[PATCH 4/5] btrfs: refactor priority_reclaim_metadata_space

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With the eviction flushing stuff we'll want to allow for different
states, but still work basically the same way that
priority_reclaim_metadata_space works currently.  Refactor this to take
the flushing states and size as an argument so we can use the same logic
for limit flushing and eviction flushing.

Signed-off-by: Josef Bacik <josef@xxxxxxxxxxxxxx>
---
 fs/btrfs/space-info.c | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/fs/btrfs/space-info.c b/fs/btrfs/space-info.c
index 71749b355136..03556e411b11 100644
--- a/fs/btrfs/space-info.c
+++ b/fs/btrfs/space-info.c
@@ -868,9 +868,12 @@ static const enum btrfs_flush_state priority_flush_states[] = {
 	ALLOC_CHUNK,
 };
 
-static void priority_reclaim_metadata_space(struct btrfs_fs_info *fs_info,
-					    struct btrfs_space_info *space_info,
-					    struct reserve_ticket *ticket)
+static void
+priority_reclaim_metadata_space(struct btrfs_fs_info *fs_info,
+				struct btrfs_space_info *space_info,
+				struct reserve_ticket *ticket,
+				const enum btrfs_flush_state *states,
+				int states_nr)
 {
 	u64 to_reclaim;
 	int flush_state;
@@ -887,7 +890,7 @@ static void priority_reclaim_metadata_space(struct btrfs_fs_info *fs_info,
 	flush_state = 0;
 	do {
 		flush_space(fs_info, space_info, to_reclaim,
-			    priority_flush_states[flush_state]);
+			    states[flush_state]);
 		flush_state++;
 		spin_lock(&space_info->lock);
 		if (ticket->bytes == 0) {
@@ -895,7 +898,7 @@ static void priority_reclaim_metadata_space(struct btrfs_fs_info *fs_info,
 			return;
 		}
 		spin_unlock(&space_info->lock);
-	} while (flush_state < ARRAY_SIZE(priority_flush_states));
+	} while (flush_state < states_nr);
 }
 
 static void wait_reserve_ticket(struct btrfs_fs_info *fs_info,
@@ -944,7 +947,9 @@ static int handle_reserve_ticket(struct btrfs_fs_info *fs_info,
 	if (flush == BTRFS_RESERVE_FLUSH_ALL)
 		wait_reserve_ticket(fs_info, space_info, ticket);
 	else
-		priority_reclaim_metadata_space(fs_info, space_info, ticket);
+		priority_reclaim_metadata_space(fs_info, space_info, ticket,
+						priority_flush_states,
+						ARRAY_SIZE(priority_flush_states));
 
 	spin_lock(&space_info->lock);
 	ret = ticket->error;
-- 
2.21.0




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