From: Christian Brauner <brauner@kernel.org>
To: linux-fsdevel@vger.kernel.org
Cc: Josef Bacik <josef@toxicpanda.com>,
Jeff Layton <jlayton@kernel.org>, Karel Zak <kzak@redhat.com>,
Stephane Graber <stgraber@stgraber.org>,
Christian Brauner <brauner@kernel.org>,
Alexander Mikhalitsyn <alexander@mihalicyn.com>
Subject: [PATCH RFC 3/5] fs: add put_mnt_ns() cleanup helper
Date: Fri, 19 Jul 2024 13:41:50 +0200 [thread overview]
Message-ID: <20240719-work-mount-namespace-v1-3-834113cab0d2@kernel.org> (raw)
In-Reply-To: <20240719-work-mount-namespace-v1-0-834113cab0d2@kernel.org>
Add a simple helper to put a mount namespace reference.
Signed-off-by: Christian Brauner <brauner@kernel.org>
---
include/linux/mnt_namespace.h | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/include/linux/mnt_namespace.h b/include/linux/mnt_namespace.h
index 8f882f5881e8..70b366b64816 100644
--- a/include/linux/mnt_namespace.h
+++ b/include/linux/mnt_namespace.h
@@ -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;
--
2.43.0
next prev parent reply other threads:[~2024-07-19 11:42 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-07-19 11:41 [PATCH RFC 0/5] nsfs: iterate through mount namespaces Christian Brauner
2024-07-19 11:41 ` [PATCH RFC 1/5] fs: use all available ids Christian Brauner
2024-07-19 11:41 ` [PATCH RFC 2/5] fs: allow mount namespace fd Christian Brauner
2024-07-19 11:41 ` Christian Brauner [this message]
2024-07-19 11:41 ` [PATCH RFC 4/5] file: add fput() cleanup helper Christian Brauner
2024-07-19 11:41 ` [PATCH RFC 5/5] nsfs: iterate through mount namespaces Christian Brauner
2024-07-19 14:53 ` [PATCH RFC 0/5] " Josef Bacik
2024-07-22 14:42 ` Jeff Layton
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