[PATCH v4 15/15] xfs: use blkdev_report_zones_cached()

[Damien Le Moal]

Modify xfs_mount_zones() to replace the call to blkdev_report_zones()
with blkdev_report_zones_cached() to speed-up mount operations.
Since this causes xfs_zone_validate_seq() to see zones with the
BLK_ZONE_COND_ACTIVE condition, this function is also modified to acept
this condition as valid.

With this change, mounting a freshly formatted large capacity (30 TB)
SMR HDD completes under 2s compared to over 4.7s before.

Signed-off-by: Damien Le Moal <dlemoal at kernel.org>
---
 fs/xfs/libxfs/xfs_zones.c | 1 +
 fs/xfs/xfs_zone_alloc.c   | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/xfs/libxfs/xfs_zones.c b/fs/xfs/libxfs/xfs_zones.c
index b0791a71931c..b40f71f878b5 100644
--- a/fs/xfs/libxfs/xfs_zones.c
+++ b/fs/xfs/libxfs/xfs_zones.c
@@ -95,6 +95,7 @@ xfs_zone_validate_seq(
 	case BLK_ZONE_COND_IMP_OPEN:
 	case BLK_ZONE_COND_EXP_OPEN:
 	case BLK_ZONE_COND_CLOSED:
+	case BLK_ZONE_COND_ACTIVE:
 		return xfs_zone_validate_wp(zone, rtg, write_pointer);
 	case BLK_ZONE_COND_FULL:
 		return xfs_zone_validate_full(zone, rtg, write_pointer);
diff --git a/fs/xfs/xfs_zone_alloc.c b/fs/xfs/xfs_zone_alloc.c
index 040402240807..9c8587622692 100644
--- a/fs/xfs/xfs_zone_alloc.c
+++ b/fs/xfs/xfs_zone_alloc.c
@@ -1239,7 +1239,7 @@ xfs_mount_zones(
 	trace_xfs_zones_mount(mp);
 
 	if (bdev_is_zoned(bt->bt_bdev)) {
-		error = blkdev_report_zones(bt->bt_bdev,
+		error = blkdev_report_zones_cached(bt->bt_bdev,
 				XFS_FSB_TO_BB(mp, mp->m_sb.sb_rtstart),
 				mp->m_sb.sb_rgcount, xfs_get_zone_info_cb, &iz);
 		if (error < 0)
-- 
2.51.0