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authorAliaksei Karaliou <akaraliou.dev@gmail.com>2017-12-21 13:18:26 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-03-03 10:19:44 +0100
commit6bfb63b4e796aadf5ac7a2988c68bda5fa265977 (patch)
tree821f3410b92a2e0aeb1bd3e583b9a982ae938022 /fs/xfs
parenta72e35738163e36905012537c6a44c87fa61475a (diff)
xfs: quota: check result of register_shrinker()
[ Upstream commit 3a3882ff26fbdbaf5f7e13f6a0bccfbf7121041d ] xfs_qm_init_quotainfo() does not check result of register_shrinker() which was tagged as __must_check recently, reported by sparse. Signed-off-by: Aliaksei Karaliou <akaraliou.dev@gmail.com> [darrick: move xfs_qm_destroy_quotainos nearer xfs_qm_init_quotainos] Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/xfs')
-rw-r--r--fs/xfs/xfs_qm.c45
1 files changed, 29 insertions, 16 deletions
diff --git a/fs/xfs/xfs_qm.c b/fs/xfs/xfs_qm.c
index 352b9c66a255..b148aa0e10f7 100644
--- a/fs/xfs/xfs_qm.c
+++ b/fs/xfs/xfs_qm.c
@@ -47,7 +47,7 @@
STATIC int xfs_qm_init_quotainos(xfs_mount_t *);
STATIC int xfs_qm_init_quotainfo(xfs_mount_t *);
-
+STATIC void xfs_qm_destroy_quotainos(xfs_quotainfo_t *qi);
STATIC void xfs_qm_dqfree_one(struct xfs_dquot *dqp);
/*
* We use the batch lookup interface to iterate over the dquots as it
@@ -660,9 +660,17 @@ xfs_qm_init_quotainfo(
qinf->qi_shrinker.scan_objects = xfs_qm_shrink_scan;
qinf->qi_shrinker.seeks = DEFAULT_SEEKS;
qinf->qi_shrinker.flags = SHRINKER_NUMA_AWARE;
- register_shrinker(&qinf->qi_shrinker);
+
+ error = register_shrinker(&qinf->qi_shrinker);
+ if (error)
+ goto out_free_inos;
+
return 0;
+out_free_inos:
+ mutex_destroy(&qinf->qi_quotaofflock);
+ mutex_destroy(&qinf->qi_tree_lock);
+ xfs_qm_destroy_quotainos(qinf);
out_free_lru:
list_lru_destroy(&qinf->qi_lru);
out_free_qinf:
@@ -671,7 +679,6 @@ out_free_qinf:
return error;
}
-
/*
* Gets called when unmounting a filesystem or when all quotas get
* turned off.
@@ -688,19 +695,7 @@ xfs_qm_destroy_quotainfo(
unregister_shrinker(&qi->qi_shrinker);
list_lru_destroy(&qi->qi_lru);
-
- if (qi->qi_uquotaip) {
- IRELE(qi->qi_uquotaip);
- qi->qi_uquotaip = NULL; /* paranoia */
- }
- if (qi->qi_gquotaip) {
- IRELE(qi->qi_gquotaip);
- qi->qi_gquotaip = NULL;
- }
- if (qi->qi_pquotaip) {
- IRELE(qi->qi_pquotaip);
- qi->qi_pquotaip = NULL;
- }
+ xfs_qm_destroy_quotainos(qi);
mutex_destroy(&qi->qi_tree_lock);
mutex_destroy(&qi->qi_quotaofflock);
kmem_free(qi);
@@ -1563,6 +1558,24 @@ error_rele:
}
STATIC void
+xfs_qm_destroy_quotainos(
+ xfs_quotainfo_t *qi)
+{
+ if (qi->qi_uquotaip) {
+ IRELE(qi->qi_uquotaip);
+ qi->qi_uquotaip = NULL; /* paranoia */
+ }
+ if (qi->qi_gquotaip) {
+ IRELE(qi->qi_gquotaip);
+ qi->qi_gquotaip = NULL;
+ }
+ if (qi->qi_pquotaip) {
+ IRELE(qi->qi_pquotaip);
+ qi->qi_pquotaip = NULL;
+ }
+}
+
+STATIC void
xfs_qm_dqfree_one(
struct xfs_dquot *dqp)
{