Initialize and destroy quota info when cloning a mount namespace or
free it up when the namespace was destroyed separately.
Signed-off-by: Jie Liu <redacted>
---
fs/namespace.c | 28 ++++++++++++++++++++++++++++
1 files changed, 28 insertions(+), 0 deletions(-)
diff --git a/fs/namespace.c b/fs/namespace.c
index 8823ba8..b12a054 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -23,6 +23,11 @@
#include "pnode.h"
#include "internal.h"
+#ifdef CONFIG_NS_QUOTA
+#include "ns_quota.h"
+#include "ns_quotaops.h"
+#endif
+
#define HASH_SHIFT ilog2(PAGE_SIZE / sizeof(struct list_head))
#define HASH_SIZE (1UL << HASH_SHIFT)
@@ -2204,6 +2209,17 @@ static struct mnt_namespace *alloc_mnt_ns(void)
INIT_LIST_HEAD(&new_ns->list);
init_waitqueue_head(&new_ns->poll);
new_ns->event = 0;
+#ifdef CONFIG_NS_QUOTA
+ /*
+ * Don't trying to enable the corresponding disk quota stuff
+ * at the this stage for now. We need to come up with a
+ * reasonable definition for mount namespace or container disk
+ * quotas.
+ */
+ new_ns->ns_qcop = NULL;
+ new_ns->ns_dqop = NULL;
+ new_ns->ns_dqinfo = NULL;
+#endif
return new_ns;
}
@@ -2250,6 +2266,15 @@ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns,
return ERR_PTR(-ENOMEM);
}
new_ns->root = new;
+#ifdef CONFIG_NS_QUOTA
+ /*
+ * Initialize disk quota stuff if the current mount namespace is
+ * cloned for containers.
+ */
+ new_ns->ns_qcop = &ns_quotactl_operations;
+ new_ns->ns_dqop = &ns_dquot_operations;
+ ns_dqinfo_init(new_ns);
+#endif
br_write_lock(vfsmount_lock);
list_add_tail(&new_ns->list, &new->mnt_list);
br_write_unlock(vfsmount_lock);
@@ -2598,6 +2623,9 @@ void put_mnt_ns(struct mnt_namespace *ns)
down_write(&namespace_sem);
br_write_lock(vfsmount_lock);
umount_tree(ns->root, 0, &umount_list);
+#ifdef CONFIG_NS_QUOTA
+ ns_dqinfo_destroy(ns);
+#endif
br_write_unlock(vfsmount_lock);
up_write(&namespace_sem);
release_mounts(&umount_list);
--
1.7.9