linux-kernel - [PATCH v9 01/12] fs: export mnt_idmap_get/mnt_idmap

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Message-Id: <20230804084858.126104-2-aleksandr.mikhalitsyn@canonical.com>
Date:   Fri,  4 Aug 2023 10:48:47 +0200
From:   Alexander Mikhalitsyn <aleksandr.mikhalitsyn@...onical.com>
To:     xiubli@...hat.com
Cc:     brauner@...nel.org, stgraber@...ntu.com,
        linux-fsdevel@...r.kernel.org, Jeff Layton <jlayton@...nel.org>,
        Ilya Dryomov <idryomov@...il.com>, ceph-devel@...r.kernel.org,
        Alexander Mikhalitsyn <aleksandr.mikhalitsyn@...onical.com>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Seth Forshee <sforshee@...nel.org>,
        linux-kernel@...r.kernel.org
Subject: [PATCH v9 01/12] fs: export mnt_idmap_get/mnt_idmap_put

These helpers are required to support idmapped mounts in the Cephfs.

Cc: Christian Brauner <brauner@...nel.org>
Cc: Xiubo Li <xiubli@...hat.com>
Cc: Jeff Layton <jlayton@...nel.org>
Cc: Ilya Dryomov <idryomov@...il.com>
Cc: ceph-devel@...r.kernel.org
Cc: linux-fsdevel@...r.kernel.org
Signed-off-by: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@...onical.com>
Reviewed-by: Christian Brauner <brauner@...nel.org>
---
v3:
	- EXPORT_SYMBOL -> EXPORT_SYMBOL_GPL as Christoph Hellwig suggested
---
 fs/mnt_idmapping.c            | 2 ++
 include/linux/mnt_idmapping.h | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/fs/mnt_idmapping.c b/fs/mnt_idmapping.c
index 4905665c47d0..57d1dedf3f8f 100644
--- a/fs/mnt_idmapping.c
+++ b/fs/mnt_idmapping.c
@@ -256,6 +256,7 @@ struct mnt_idmap *mnt_idmap_get(struct mnt_idmap *idmap)
 
 	return idmap;
 }
+EXPORT_SYMBOL_GPL(mnt_idmap_get);
 
 /**
  * mnt_idmap_put - put a reference to an idmapping
@@ -271,3 +272,4 @@ void mnt_idmap_put(struct mnt_idmap *idmap)
 		kfree(idmap);
 	}
 }
+EXPORT_SYMBOL_GPL(mnt_idmap_put);
diff --git a/include/linux/mnt_idmapping.h b/include/linux/mnt_idmapping.h
index 057c89867aa2..b8da2db4ecd2 100644
--- a/include/linux/mnt_idmapping.h
+++ b/include/linux/mnt_idmapping.h
@@ -115,6 +115,9 @@ static inline bool vfsgid_eq_kgid(vfsgid_t vfsgid, kgid_t kgid)
 
 int vfsgid_in_group_p(vfsgid_t vfsgid);
 
+struct mnt_idmap *mnt_idmap_get(struct mnt_idmap *idmap);
+void mnt_idmap_put(struct mnt_idmap *idmap);
+
 vfsuid_t make_vfsuid(struct mnt_idmap *idmap,
 		     struct user_namespace *fs_userns, kuid_t kuid);
 
-- 
2.34.1