[PATCH 08/32] xfs: update imeta transaction reservations for metadir

["Darrick J. Wong" <djwong@xxxxxxxxxx>]

From: Darrick J. Wong <djwong@xxxxxxxxxx>

Update the new metadata inode transaction reservations to handle
metadata directories if that feature is enabled.

Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
---
 fs/xfs/libxfs/xfs_trans_resv.c |  101 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 98 insertions(+), 3 deletions(-)


diff --git a/fs/xfs/libxfs/xfs_trans_resv.c b/fs/xfs/libxfs/xfs_trans_resv.c
index d7c9af3406949..a0545daf039c7 100644
--- a/fs/xfs/libxfs/xfs_trans_resv.c
+++ b/fs/xfs/libxfs/xfs_trans_resv.c
@@ -1109,6 +1109,81 @@ xfs_calc_sb_reservation(
 	return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize);
 }
 
+/*
+ * Metadata inode creation needs enough space to create or mkdir a directory,
+ * plus logging the superblock.
+ */
+static unsigned int
+xfs_calc_imeta_create_resv(
+	struct xfs_mount	*mp,
+	struct xfs_trans_resv	*resp)
+{
+	unsigned int		ret;
+
+	ret = xfs_calc_buf_res(1, mp->m_sb.sb_sectsize);
+	ret += resp->tr_create.tr_logres;
+	return ret;
+}
+
+/* Metadata inode creation needs enough rounds to create or mkdir a directory */
+static int
+xfs_calc_imeta_create_count(
+	struct xfs_mount	*mp,
+	struct xfs_trans_resv	*resp)
+{
+	return resp->tr_create.tr_logcount;
+}
+
+/*
+ * Metadata inode link needs enough space to add a file plus logging the
+ * superblock.
+ */
+static unsigned int
+xfs_calc_imeta_link_resv(
+	struct xfs_mount	*mp,
+	struct xfs_trans_resv	*resp)
+{
+	unsigned int		ret;
+
+	ret = xfs_calc_buf_res(1, mp->m_sb.sb_sectsize);
+	ret += resp->tr_link.tr_logres;
+	return ret;
+}
+
+/* Metadata inode linking needs enough rounds to remove a file. */
+static int
+xfs_calc_imeta_link_count(
+	struct xfs_mount	*mp,
+	struct xfs_trans_resv	*resp)
+{
+	return resp->tr_link.tr_logcount;
+}
+
+/*
+ * Metadata inode unlink needs enough space to remove a file plus logging the
+ * superblock.
+ */
+static unsigned int
+xfs_calc_imeta_unlink_resv(
+	struct xfs_mount	*mp,
+	struct xfs_trans_resv	*resp)
+{
+	unsigned int		ret;
+
+	ret = xfs_calc_buf_res(1, mp->m_sb.sb_sectsize);
+	ret += resp->tr_remove.tr_logres;
+	return ret;
+}
+
+/* Metadata inode unlinking needs enough rounds to remove a file. */
+static int
+xfs_calc_imeta_unlink_count(
+	struct xfs_mount	*mp,
+	struct xfs_trans_resv	*resp)
+{
+	return resp->tr_remove.tr_logcount;
+}
+
 /*
  * Namespace reservations.
  *
@@ -1251,7 +1326,27 @@ xfs_trans_resv_calc(
 	resp->tr_qm_dqalloc.tr_logcount += logcount_adj;
 
 	/* metadata inode creation and unlink */
-	resp->tr_imeta_create = resp->tr_create;
-	resp->tr_imeta_link = resp->tr_link;
-	resp->tr_imeta_unlink = resp->tr_remove;
+	if (xfs_has_metadir(mp)) {
+		resp->tr_imeta_create.tr_logres =
+				xfs_calc_imeta_create_resv(mp, resp);
+		resp->tr_imeta_create.tr_logcount =
+				xfs_calc_imeta_create_count(mp, resp);
+		resp->tr_imeta_create.tr_logflags |= XFS_TRANS_PERM_LOG_RES;
+
+		resp->tr_imeta_link.tr_logres =
+				xfs_calc_imeta_link_resv(mp, resp);
+		resp->tr_imeta_link.tr_logcount =
+				xfs_calc_imeta_link_count(mp, resp);
+		resp->tr_imeta_link.tr_logflags |= XFS_TRANS_PERM_LOG_RES;
+
+		resp->tr_imeta_unlink.tr_logres =
+				xfs_calc_imeta_unlink_resv(mp, resp);
+		resp->tr_imeta_unlink.tr_logcount =
+				xfs_calc_imeta_unlink_count(mp, resp);
+		resp->tr_imeta_unlink.tr_logflags |= XFS_TRANS_PERM_LOG_RES;
+	} else {
+		resp->tr_imeta_create = resp->tr_create;
+		resp->tr_imeta_link = resp->tr_link;
+		resp->tr_imeta_unlink = resp->tr_remove;
+	}
 }