[PATCH 05/13] xfs: close the RT and log block devices in xfs_free_buftarg

Christoph Hellwig
2023-08-09T22:05:55Z

Closing the block devices logically belongs into xfs_free_buftarg, So
instead of open coding it in the caller move it there and add a check
for the s_bdev so that the main device isn't close as that's done by the
VFS helper.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
---
fs/xfs/xfs_buf.c | 5 +++++
fs/xfs/xfs_super.c | 12 ++----------
2 files changed, 7 insertions(+), 10 deletions(-)

diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index 15d1e5a7c2d340..e33eb17648dfed 100644
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -1938,6 +1938,8 @@ void
xfs_free_buftarg(
struct xfs_buftarg *btp)
{
+ struct block_device *bdev = btp->bt_bdev;
+
unregister_shrinker(&btp->bt_shrinker);
ASSERT(percpu_counter_sum(&btp->bt_io_count) == 0);
percpu_counter_destroy(&btp->bt_io_count);
@@ -1946,6 +1948,9 @@ xfs_free_buftarg(
blkdev_issue_flush(btp->bt_bdev);
invalidate_bdev(btp->bt_bdev);
fs_put_dax(btp->bt_daxdev, btp->bt_mount);
+ /* the main block device is closed by kill_block_super */
+ if (bdev != btp->bt_mount->m_super->s_bdev)
+ blkdev_put(bdev, btp->bt_mount->m_super);

kmem_free(btp);
}
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index fc21e543357ef5..368c05a2dea5b9 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -399,18 +399,10 @@ STATIC void
xfs_close_devices(
struct xfs_mount *mp)
{
- if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
- struct block_device *logdev = mp->m_logdev_targp->bt_bdev;
-
+ if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp)
xfs_free_buftarg(mp->m_logdev_targp);
- blkdev_put(logdev, mp->m_super);
- }
- if (mp->m_rtdev_targp) {
- struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev;
-
+ if (mp->m_rtdev_targp)
xfs_free_buftarg(mp->m_rtdev_targp);
- blkdev_put(rtdev, mp->m_super);
- }
xfs_free_buftarg(mp->m_ddev_targp);
}

--
2.39.2