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-rw-r--r--fs/mount.h20
1 files changed, 18 insertions, 2 deletions
diff --git a/fs/mount.h b/fs/mount.h
index 64a858143ff9..d64c594be6c4 100644
--- a/fs/mount.h
+++ b/fs/mount.h
@@ -29,6 +29,7 @@ struct mount {
struct mount *mnt_parent;
struct dentry *mnt_mountpoint;
struct vfsmount mnt;
+ struct rcu_head mnt_rcu;
#ifdef CONFIG_SMP
struct mnt_pcp __percpu *mnt_pcp;
#else
@@ -55,7 +56,7 @@ struct mount {
int mnt_group_id; /* peer group identifier */
int mnt_expiry_mark; /* true if marked for expiry */
int mnt_pinned;
- int mnt_ghosts;
+ struct path mnt_ex_mountpoint;
};
#define MNT_NS_INTERNAL ERR_PTR(-EINVAL) /* distinct from any mnt_namespace */
@@ -76,13 +77,28 @@ static inline int is_mounted(struct vfsmount *mnt)
return !IS_ERR_OR_NULL(real_mount(mnt));
}
-extern struct mount *__lookup_mnt(struct vfsmount *, struct dentry *, int);
+extern struct mount *__lookup_mnt(struct vfsmount *, struct dentry *);
+extern struct mount *__lookup_mnt_last(struct vfsmount *, struct dentry *);
+
+extern bool legitimize_mnt(struct vfsmount *, unsigned);
static inline void get_mnt_ns(struct mnt_namespace *ns)
{
atomic_inc(&ns->count);
}
+extern seqlock_t mount_lock;
+
+static inline void lock_mount_hash(void)
+{
+ write_seqlock(&mount_lock);
+}
+
+static inline void unlock_mount_hash(void)
+{
+ write_sequnlock(&mount_lock);
+}
+
struct proc_mounts {
struct seq_file m;
struct mnt_namespace *ns;