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Wong" , Naohiro Aota , Josef Bacik Subject: [PATCH v12 18/41] btrfs: reset zones of unused block groups Date: Fri, 15 Jan 2021 15:53:22 +0900 Message-Id: X-Mailer: git-send-email 2.27.0 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org For an ZONED 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. Reviewed-by: Josef Bacik Signed-off-by: Naohiro Aota --- fs/btrfs/block-group.c | 8 ++++++-- fs/btrfs/extent-tree.c | 17 ++++++++++++----- fs/btrfs/zoned.h | 16 ++++++++++++++++ 3 files changed, 34 insertions(+), 7 deletions(-) diff --git a/fs/btrfs/block-group.c b/fs/btrfs/block-group.c index 21ff5ff0c735..f7c85cc81d1e 100644 --- a/fs/btrfs/block-group.c +++ b/fs/btrfs/block-group.c @@ -1400,8 +1400,12 @@ void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info) if (!async_trim_enabled && btrfs_test_opt(fs_info, DISCARD_ASYNC)) goto flip_async; - /* DISCARD can flip during remount */ - trimming = btrfs_test_opt(fs_info, DISCARD_SYNC); + /* + * DISCARD can flip during remount. In ZONED mode, we need + * to reset sequential required zones. + */ + trimming = btrfs_test_opt(fs_info, DISCARD_SYNC) || + btrfs_is_zoned(fs_info); /* Implicit trim during transaction commit. */ if (trimming) diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index c3e955bbd2ab..ac24a79ce32a 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -1333,6 +1333,9 @@ int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr, stripe = bbio->stripes; for (i = 0; i < bbio->num_stripes; i++, stripe++) { + struct btrfs_device *dev = stripe->dev; + u64 physical = stripe->physical; + u64 length = stripe->length; u64 bytes; struct request_queue *req_q; @@ -1340,14 +1343,18 @@ int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr, ASSERT(btrfs_test_opt(fs_info, DEGRADED)); continue; } + req_q = bdev_get_queue(stripe->dev->bdev); - if (!blk_queue_discard(req_q)) + /* Zone reset in ZONED mode */ + if (btrfs_can_zone_reset(dev, physical, length)) + ret = btrfs_reset_device_zone(dev, physical, + length, &bytes); + else if (blk_queue_discard(req_q)) + ret = btrfs_issue_discard(dev->bdev, physical, + length, &bytes); + else continue; - ret = btrfs_issue_discard(stripe->dev->bdev, - stripe->physical, - stripe->length, - &bytes); if (!ret) { discarded_bytes += bytes; } else if (ret != -EOPNOTSUPP) { diff --git a/fs/btrfs/zoned.h b/fs/btrfs/zoned.h index b2ce16de0c22..331951978487 100644 --- a/fs/btrfs/zoned.h +++ b/fs/btrfs/zoned.h @@ -210,4 +210,20 @@ static inline bool btrfs_check_super_location(struct btrfs_device *device, u64 p return device->zone_info == NULL || !btrfs_dev_is_sequential(device, pos); } +static inline bool btrfs_can_zone_reset(struct btrfs_device *device, + u64 physical, u64 length) +{ + u64 zone_size; + + if (!btrfs_dev_is_sequential(device, physical)) + return false; + + zone_size = device->zone_info->zone_size; + if (!IS_ALIGNED(physical, zone_size) || + !IS_ALIGNED(length, zone_size)) + return false; + + return true; +} + #endif