If netfs exist, fscache should not increase the reference of parent's
usage and n_children, otherwise, never be decreased.
v2: thanks David's suggest,
move increasing reference of parent if success
use kmem_cache_free() freeing primary_index directly
Signed-off-by: Kinglong Mee <kinglongmee@xxxxxxxxx>
---
fs/fscache/netfs.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)
diff --git a/fs/fscache/netfs.c b/fs/fscache/netfs.c
index 6d941f5..bea1f2e 100644
--- a/fs/fscache/netfs.c
+++ b/fs/fscache/netfs.c
@@ -43,13 +43,9 @@ int __fscache_register_netfs(struct fscache_netfs *netfs)
atomic_set(&netfs->primary_index->n_active, 1);
netfs->primary_index->def = &fscache_fsdef_netfs_def;
- netfs->primary_index->parent = &fscache_fsdef_index;
netfs->primary_index->netfs_data = netfs;
netfs->primary_index->flags = 1 << FSCACHE_COOKIE_ENABLED;
- atomic_inc(&netfs->primary_index->parent->usage);
- atomic_inc(&netfs->primary_index->parent->n_children);
-
spin_lock_init(&netfs->primary_index->lock);
INIT_HLIST_HEAD(&netfs->primary_index->backing_objects);
@@ -62,6 +58,10 @@ int __fscache_register_netfs(struct fscache_netfs *netfs)
goto already_registered;
}
+ netfs->primary_index->parent = &fscache_fsdef_index;
+ atomic_inc(&netfs->primary_index->parent->usage);
+ atomic_inc(&netfs->primary_index->parent->n_children);
+
list_add(&netfs->link, &fscache_netfs_list);
ret = 0;
@@ -71,8 +71,7 @@ already_registered:
up_write(&fscache_addremove_sem);
if (ret < 0) {
- netfs->primary_index->parent = NULL;
- __fscache_cookie_put(netfs->primary_index);
+ kmem_cache_free(fscache_cookie_jar, netfs->primary_index);
netfs->primary_index = NULL;
}
--
2.3.5
--
To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
