[PATCH 03/13] xfs: free the xfs_mount in ->kill_sb

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

As a rule of thumb everything allocated to the fs_context and moved into
the super_block should be freed by ->kill_sb so that the teardown
handling doesn't need to be duplicated between the fill_super error
path and put_super. Implement a XFS-specific kill_sb method to do that.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Christian Brauner <brauner@kernel.org>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
---
fs/xfs/xfs_super.c | 20 +++++++++++---------
1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 128f4a2924d49c..d2f3ae6ba8938b 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -1143,9 +1143,6 @@ xfs_fs_put_super(
xfs_destroy_percpu_counters(mp);
xfs_destroy_mount_workqueues(mp);
xfs_close_devices(mp);
-
- sb->s_fs_info = NULL;
- xfs_mount_free(mp);
}

static long
@@ -1487,7 +1484,7 @@ xfs_fs_fill_super(

error = xfs_fs_validate_params(mp);
if (error)
- goto out_free_names;
+ return error;

sb_min_blocksize(sb, BBSIZE);
sb->s_xattr = xfs_xattr_handlers;
@@ -1514,7 +1511,7 @@ xfs_fs_fill_super(

error = xfs_open_devices(mp);
if (error)
- goto out_free_names;
+ return error;

error = xfs_init_mount_workqueues(mp);
if (error)
@@ -1734,9 +1731,6 @@ xfs_fs_fill_super(
xfs_destroy_mount_workqueues(mp);
out_close_devices:
xfs_close_devices(mp);
- out_free_names:
- sb->s_fs_info = NULL;
- xfs_mount_free(mp);
return error;

out_unmount:
@@ -1999,12 +1993,20 @@ static int xfs_init_fs_context(
return 0;
}

+static void
+xfs_kill_sb(
+ struct super_block *sb)
+{
+ kill_block_super(sb);
+ xfs_mount_free(XFS_M(sb));
+}
+
static struct file_system_type xfs_fs_type = {
.owner = THIS_MODULE,
.name = "xfs",
.init_fs_context = xfs_init_fs_context,
.parameters = xfs_fs_parameters,
- .kill_sb = kill_block_super,
+ .kill_sb = xfs_kill_sb,
.fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP,
};
MODULE_ALIAS_FS("xfs");
--
2.39.2