xfs: trigger all block gc scans when low on quota space

The functions to run an eof/cowblocks scan to try to reduce quota usage
are kind of a mess -- the logic repeatedly initializes an eofb structure
and there are logic bugs in the code that result in the cowblocks scan
never actually happening.

Replace all three functions with a single function that fills out an
eofb and runs both eof and cowblocks scans.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>

1 files changed, 16 insertions, 30 deletions

diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c
index deb99300d171..c71eb15e3835 100644
--- a/fs/xfs/xfs_icache.c
+++ b/fs/xfs/xfs_icache.c
@@ -1397,33 +1397,31 @@ xfs_icache_free_eofblocks(
 }
 
 /*
- * Run eofblocks scans on the quotas applicable to the inode. For inodes with
- * multiple quotas, we don't know exactly which quota caused an allocation
+ * Run cow/eofblocks scans on the quotas applicable to the inode. For inodes
+ * with multiple quotas, we don't know exactly which quota caused an allocation
  * failure. We make a best effort by including each quota under low free space
  * conditions (less than 1% free space) in the scan.
  */
-static int
-__xfs_inode_free_quota_eofblocks(
-	struct xfs_inode	*ip,
-	int			(*execute)(struct xfs_mount *mp,
-					   struct xfs_eofblocks	*eofb))
+bool
+xfs_inode_free_quota_blocks(
+	struct xfs_inode	*ip)
 {
-	int scan = 0;
-	struct xfs_eofblocks eofb = {0};
-	struct xfs_dquot *dq;
+	struct xfs_eofblocks	eofb = {0};
+	struct xfs_dquot	*dq;
+	bool			do_work = false;
 
 	/*
 	 * Run a sync scan to increase effectiveness and use the union filter to
 	 * cover all applicable quotas in a single scan.
 	 */
-	eofb.eof_flags = XFS_EOF_FLAGS_UNION|XFS_EOF_FLAGS_SYNC;
+	eofb.eof_flags = XFS_EOF_FLAGS_UNION | XFS_EOF_FLAGS_SYNC;
 
 	if (XFS_IS_UQUOTA_ENFORCED(ip->i_mount)) {
 		dq = xfs_inode_dquot(ip, XFS_DQTYPE_USER);
 		if (dq && xfs_dquot_lowsp(dq)) {
 			eofb.eof_uid = VFS_I(ip)->i_uid;
 			eofb.eof_flags |= XFS_EOF_FLAGS_UID;
-			scan = 1;
+			do_work = true;
 		}
 	}
 
@@ -1432,21 +1430,16 @@ __xfs_inode_free_quota_eofblocks(
 		if (dq && xfs_dquot_lowsp(dq)) {
 			eofb.eof_gid = VFS_I(ip)->i_gid;
 			eofb.eof_flags |= XFS_EOF_FLAGS_GID;
-			scan = 1;
+			do_work = true;
 		}
 	}
 
-	if (scan)
-		execute(ip->i_mount, &eofb);
-
-	return scan;
-}
+	if (!do_work)
+		return false;
 
-int
-xfs_inode_free_quota_eofblocks(
-	struct xfs_inode *ip)
-{
-	return __xfs_inode_free_quota_eofblocks(ip, xfs_icache_free_eofblocks);
+	xfs_icache_free_eofblocks(ip->i_mount, &eofb);
+	xfs_icache_free_cowblocks(ip->i_mount, &eofb);
+	return true;
 }
 
 static inline unsigned long
@@ -1646,13 +1639,6 @@ xfs_icache_free_cowblocks(
 			XFS_ICI_COWBLOCKS_TAG);
 }
 
-int
-xfs_inode_free_quota_cowblocks(
-	struct xfs_inode *ip)
-{
-	return __xfs_inode_free_quota_eofblocks(ip, xfs_icache_free_cowblocks);
-}
-
 void
 xfs_inode_set_cowblocks_tag(
 	xfs_inode_t	*ip)