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fs: add put_mnt_ns() cleanup helper

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Add a simple helper to put a mount namespace reference.

Link: https://lore.kernel.org/r/20240719-work-mount-namespace-v1-3-834113cab0d2@kernel.org
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner 2024-07-19 13:41:50 +02:00
parent 7b9d14af87
commit 5fcf329676
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1 changed files with 4 additions and 0 deletions
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4
include/linux/mnt_namespace.h
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@ -3,6 +3,9 @@
#define _NAMESPACE_H_
#ifdef __KERNEL__
#include <linux/cleanup.h>
#include <linux/err.h>
struct mnt_namespace;
struct fs_struct;
struct user_namespace;
@ -11,6 +14,7 @@ struct ns_common;
extern struct mnt_namespace *copy_mnt_ns(unsigned long, struct mnt_namespace *,
struct user_namespace *, struct fs_struct *);
extern void put_mnt_ns(struct mnt_namespace *ns);
DEFINE_FREE(put_mnt_ns, struct mnt_namespace *, if (!IS_ERR_OR_NULL(_T)) put_mnt_ns(_T))
extern struct ns_common *from_mnt_ns(struct mnt_namespace *);
extern const struct file_operations proc_mounts_operations;