[PATCH 10/11] xfs: move xfs_inode_ag_iterator to be closer to the perag walking code

From: "Darrick J. Wong" <darrick.wong@oracle.com>
To: darrick.wong@oracle.com
Cc: linux-xfs@vger.kernel.org
Subject: [PATCH 10/11] xfs: move xfs_inode_ag_iterator to be closer to the perag walking code
Date: Tue, 31 Dec 2019 17:07:02 -0800	[thread overview]
Message-ID: <157784082215.1360343.9575394838862742771.stgit@magnolia> (raw)
In-Reply-To: <157784075463.1360343.1278255546758019580.stgit@magnolia>

From: Darrick J. Wong <darrick.wong@oracle.com>

Move the xfs_inode_ag_iterator function to be nearer xfs_inode_ag_walk
so that we don't have to scroll back and forth to figure out how the
incore inode walking function works.  No functional changes.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
 fs/xfs/xfs_icache.c |   88 ++++++++++++++++++++++++++++-----------------------
 1 file changed, 48 insertions(+), 40 deletions(-)

diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c
index c3964af55979..d74f426a0293 100644
--- a/fs/xfs/xfs_icache.c
+++ b/fs/xfs/xfs_icache.c
@@ -787,6 +787,10 @@ xfs_inode_ag_walk_grab(
 	return false;
 }
 
+/*
+ * For a given per-AG structure @pag, @grab, @execute, and @rele all incore
+ * inodes with the given radix tree @tag.
+ */
 STATIC int
 xfs_inode_ag_walk(
 	struct xfs_mount	*mp,
@@ -892,6 +896,50 @@ xfs_inode_ag_walk(
 	return last_error;
 }
 
+/* Fetch the next (possibly tagged) per-AG structure. */
+static inline struct xfs_perag *
+xfs_ici_walk_get_perag(
+	struct xfs_mount	*mp,
+	xfs_agnumber_t		agno,
+	int			tag)
+{
+	if (tag == XFS_ICI_NO_TAG)
+		return xfs_perag_get(mp, agno);
+	return xfs_perag_get_tag(mp, agno, tag);
+}
+
+/*
+ * Call the @execute function on all incore inodes matching the radix tree
+ * @tag.
+ */
+int
+xfs_inode_ag_iterator(
+	struct xfs_mount	*mp,
+	int			iter_flags,
+	int			(*execute)(struct xfs_inode *ip, void *args),
+	void			*args,
+	int			tag)
+{
+	struct xfs_perag	*pag;
+	int			error = 0;
+	int			last_error = 0;
+	xfs_agnumber_t		ag;
+
+	ag = 0;
+	while ((pag = xfs_ici_walk_get_perag(mp, ag, tag))) {
+		ag = pag->pag_agno + 1;
+		error = xfs_inode_ag_walk(mp, pag, execute, args, tag,
+				iter_flags);
+		xfs_perag_put(pag);
+		if (error) {
+			last_error = error;
+			if (error == -EFSCORRUPTED)
+				break;
+		}
+	}
+	return last_error;
+}
+
 /*
  * Background scanning to trim post-EOF preallocated space. This is queued
  * based on the 'speculative_prealloc_lifetime' tunable (5m by default).
@@ -945,46 +993,6 @@ xfs_cowblocks_worker(
 	xfs_queue_cowblocks(mp);
 }
 
-/* Fetch the next (possibly tagged) per-AG structure. */
-static inline struct xfs_perag *
-xfs_ici_walk_get_perag(
-	struct xfs_mount	*mp,
-	xfs_agnumber_t		agno,
-	int			tag)
-{
-	if (tag == XFS_ICI_NO_TAG)
-		return xfs_perag_get(mp, agno);
-	return xfs_perag_get_tag(mp, agno, tag);
-}
-
-int
-xfs_inode_ag_iterator(
-	struct xfs_mount	*mp,
-	int			iter_flags,
-	int			(*execute)(struct xfs_inode *ip, void *args),
-	void			*args,
-	int			tag)
-{
-	struct xfs_perag	*pag;
-	int			error = 0;
-	int			last_error = 0;
-	xfs_agnumber_t		ag;
-
-	ag = 0;
-	while ((pag = xfs_ici_walk_get_perag(mp, ag, tag))) {
-		ag = pag->pag_agno + 1;
-		error = xfs_inode_ag_walk(mp, pag, execute, args, tag,
-				iter_flags);
-		xfs_perag_put(pag);
-		if (error) {
-			last_error = error;
-			if (error == -EFSCORRUPTED)
-				break;
-		}
-	}
-	return last_error;
-}
-
 /*
  * Grab the inode for reclaim exclusively.
  * Return 0 if we grabbed it, non-zero otherwise.

