[15/19] btrfs: reset zones of unused block groups
diff mbox series

Message ID 20190607131025.31996-16-naohiro.aota@wdc.com
State New
Headers show
Series
  • btrfs zoned block device support
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Commit Message

Naohiro Aota June 7, 2019, 1:10 p.m. UTC
For an HMZONED volume, a block group maps to a zone of the device. For
deleted unused block groups, the zone of the block group can be reset to
rewind the zone write pointer at the start of the zone.

Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
---
 fs/btrfs/extent-tree.c | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

Patch
diff mbox series

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index cb29a96c226b..ff4d55d6ef04 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -2018,6 +2018,26 @@  int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
 				ASSERT(btrfs_test_opt(fs_info, DEGRADED));
 				continue;
 			}
+
+			if (btrfs_dev_is_sequential(stripe->dev,
+						    stripe->physical) &&
+			    stripe->length == stripe->dev->zone_size) {
+				ret = blkdev_reset_zones(stripe->dev->bdev,
+							 stripe->physical >>
+								 SECTOR_SHIFT,
+							 stripe->length >>
+								 SECTOR_SHIFT,
+							 GFP_NOFS);
+				if (!ret)
+					discarded_bytes += stripe->length;
+				else
+					break;
+				set_bit(stripe->physical >>
+						stripe->dev->zone_size_shift,
+					stripe->dev->empty_zones);
+				continue;
+			}
+
 			req_q = bdev_get_queue(stripe->dev->bdev);
 			if (!blk_queue_discard(req_q))
 				continue;
@@ -11430,7 +11450,8 @@  void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info)
 		spin_unlock(&space_info->lock);
 
 		/* DISCARD can flip during remount */
-		trimming = btrfs_test_opt(fs_info, DISCARD);
+		trimming = btrfs_test_opt(fs_info, DISCARD) ||
+				btrfs_fs_incompat(fs_info, HMZONED);
 
 		/* Implicit trim during transaction commit. */
 		if (trimming)