take check for new events in namespace (guts of mounts_poll()) to namespace.c

[cascardo/linux.git] / fs / namespace.c

diff --git a/fs/namespace.c b/fs/namespace.c
index c768f73..970fe79 100644 (file)
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -573,7 +573,7 @@ static struct vfsmount *clone_mnt(struct vfsmount *old, struct dentry *root,
                        mnt->mnt_master = old;
                        CLEAR_MNT_SHARED(mnt);
                } else if (!(flag & CL_PRIVATE)) {
-                       if ((flag & CL_PROPAGATION) || IS_MNT_SHARED(old))
+                       if ((flag & CL_MAKE_SHARED) || IS_MNT_SHARED(old))
                                list_add(&mnt->mnt_share, &old->mnt_share);
                        if (IS_MNT_SLAVE(old))
                                list_add(&mnt->mnt_slave, &old->mnt_slave);
@@ -737,6 +737,21 @@ static void m_stop(struct seq_file *m, void *v)
        up_read(&namespace_sem);
 }
 
+int mnt_had_events(struct proc_mounts *p)
+{
+       struct mnt_namespace *ns = p->ns;
+       int res = 0;
+
+       spin_lock(&vfsmount_lock);
+       if (p->event != ns->event) {
+               p->event = ns->event;
+               res = 1;
+       }
+       spin_unlock(&vfsmount_lock);
+
+       return res;
+}
+
 struct proc_fs_info {
        int flag;
        const char *str;
@@ -1246,6 +1261,21 @@ void drop_collected_mounts(struct vfsmount *mnt)
        release_mounts(&umount_list);
 }
 
+int iterate_mounts(int (*f)(struct vfsmount *, void *), void *arg,
+                  struct vfsmount *root)
+{
+       struct vfsmount *mnt;
+       int res = f(root, arg);
+       if (res)
+               return res;
+       list_for_each_entry(mnt, &root->mnt_list, mnt_list) {
+               res = f(mnt, arg);
+               if (res)
+                       return res;
+       }
+       return 0;
+}
+
 static void cleanup_group_ids(struct vfsmount *mnt, struct vfsmount *end)
 {
        struct vfsmount *p;
@@ -1538,7 +1568,7 @@ static int do_remount(struct path *path, int flags, int mnt_flags,
                err = do_remount_sb(sb, flags, data, 0);
        if (!err) {
                spin_lock(&vfsmount_lock);
-               mnt_flags |= path->mnt->mnt_flags & MNT_PNODE_MASK;
+               mnt_flags |= path->mnt->mnt_flags & MNT_PROPAGATION_MASK;
                path->mnt->mnt_flags = mnt_flags;
                spin_unlock(&vfsmount_lock);
        }