[RFC,5/6] fs: expose internal interfaces open_detached_copy and do_reconfigure_mount

Commit Message

James Bottomley Nov. 27, 2019, 8:37 p.m. UTC

These are needed for the forthcoming bind configure type to work.

Signed-off-by: James Bottomley <[e-mail]>
---
 fs/internal.h  | 3 +++
 fs/namespace.c | 4 ++--
 2 files changed, 5 insertions(+), 2 deletions(-)

Patch

diff --git a/fs/internal.h b/fs/internal.h
index e3039de79134..f27136058d7d 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -95,6 +95,9 @@  extern void dissolve_on_fput(struct vfsmount *);
 int fsopen_cf_get(const struct configfd_context *cfc,
 		  struct configfd_param *p);
 
+extern int do_reconfigure_mnt(struct path *path, unsigned int mnt_flags);
+extern struct file *open_detached_copy(struct path *path, bool recursive);
+
 /*
  * fs_struct.c
  */
diff --git a/fs/namespace.c b/fs/namespace.c
index 13be853e9225..9dcbafe62e4e 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -2318,7 +2318,7 @@  static int do_loopback(struct path *path, const char *old_name,
 	return err;
 }
 
-static struct file *open_detached_copy(struct path *path, bool recursive)
+struct file *open_detached_copy(struct path *path, bool recursive)
 {
 	struct user_namespace *user_ns = current->nsproxy->mnt_ns->user_ns;
 	struct mnt_namespace *ns = alloc_mnt_ns(user_ns, true);
@@ -2494,7 +2494,7 @@  static void mnt_warn_timestamp_expiry(struct path *mountpoint, struct vfsmount *
  * superblock it refers to.  This is triggered by specifying MS_REMOUNT|MS_BIND
  * to mount(2).
  */
-static int do_reconfigure_mnt(struct path *path, unsigned int mnt_flags)
+int do_reconfigure_mnt(struct path *path, unsigned int mnt_flags)
 {
 	struct super_block *sb = path->mnt->mnt_sb;
 	struct mount *mnt = real_mount(path->mnt);