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authorLinus Torvalds <torvalds@linux-foundation.org>2009-12-17 12:51:05 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-12-17 12:51:05 -0800
commita2770d86b33024f71df269fde2de096df89d6a48 (patch)
treed232695efd62bcdcb2b3a9b413bccea66c0ecf32
parentb8a7f3cd7e8212e5c572178ff3b5a514861036a5 (diff)
downloadlinux-sh-a2770d86b33024f71df269fde2de096df89d6a48.tar.gz
Revert "fix mismerge with Trond's stuff (create_mnt_ns() export is gone now)"
This reverts commit e9496ff46a20a8592fdc7bdaaf41b45eb808d310. Quoth Al: "it's dependent on a lot of other stuff not currently in mainline and badly broken with current fs/namespace.c. Sorry, badly out-of-order cherry-pick from old queue. PS: there's a large pending series reworking the refcounting and lifetime rules for vfsmounts that will, among other things, allow to rip a subtree away _without_ dissolving connections in it, to be garbage-collected when all active references are gone. It's considerably saner wrt "is the subtree busy" logics, but it's nowhere near being ready for merge at the moment; this changeset is one of the things becoming possible with that sucker, but it certainly shouldn't have been picked during this cycle. My apologies..." Noticed-by: Eric Paris <eparis@redhat.com> Requested-by: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--fs/namespace.c3
-rw-r--r--fs/nfs/super.c8
-rw-r--r--include/linux/mnt_namespace.h1
3 files changed, 11 insertions, 1 deletions
diff --git a/fs/namespace.c b/fs/namespace.c
index faab1273281e..7d70d63ceb29 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -2068,7 +2068,7 @@ struct mnt_namespace *copy_mnt_ns(unsigned long flags, struct mnt_namespace *ns,
* create_mnt_ns - creates a private namespace and adds a root filesystem
* @mnt: pointer to the new root filesystem mountpoint
*/
-static struct mnt_namespace *create_mnt_ns(struct vfsmount *mnt)
+struct mnt_namespace *create_mnt_ns(struct vfsmount *mnt)
{
struct mnt_namespace *new_ns;
@@ -2080,6 +2080,7 @@ static struct mnt_namespace *create_mnt_ns(struct vfsmount *mnt)
}
return new_ns;
}
+EXPORT_SYMBOL(create_mnt_ns);
SYSCALL_DEFINE5(mount, char __user *, dev_name, char __user *, dir_name,
char __user *, type, unsigned long, flags, void __user *, data)
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index d5b112bcf3de..ce907efc5508 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -2648,13 +2648,21 @@ out_freepage:
static int nfs_follow_remote_path(struct vfsmount *root_mnt,
const char *export_path, struct vfsmount *mnt_target)
{
+ struct mnt_namespace *ns_private;
struct nameidata nd;
struct super_block *s;
int ret;
+ ns_private = create_mnt_ns(root_mnt);
+ ret = PTR_ERR(ns_private);
+ if (IS_ERR(ns_private))
+ goto out_mntput;
+
ret = vfs_path_lookup(root_mnt->mnt_root, root_mnt,
export_path, LOOKUP_FOLLOW, &nd);
+ put_mnt_ns(ns_private);
+
if (ret != 0)
goto out_err;
diff --git a/include/linux/mnt_namespace.h b/include/linux/mnt_namespace.h
index d9ebf1037dfa..d74785c2393a 100644
--- a/include/linux/mnt_namespace.h
+++ b/include/linux/mnt_namespace.h
@@ -23,6 +23,7 @@ struct proc_mounts {
struct fs_struct;
+extern struct mnt_namespace *create_mnt_ns(struct vfsmount *mnt);
extern struct mnt_namespace *copy_mnt_ns(unsigned long, struct mnt_namespace *,
struct fs_struct *);
extern void put_mnt_ns(struct mnt_namespace *ns);