1 files changed, 52 insertions, 68 deletions

diff --git a/fs/pnode.c b/fs/pnode.c
index d42514e32380..ab5fa9e1a79a 100644
--- a/fs/pnode.c
+++ b/fs/pnode.c
@@ -13,45 +13,30 @@
 #include "pnode.h"
 
 /* return the next shared peer mount of @p */
-static inline struct vfsmount *next_peer(struct vfsmount *p)
+static inline struct mount *next_peer(struct mount *p)
 {
-        return list_entry(p->mnt_share.next, struct vfsmount, mnt_share);
+        return list_entry(p->mnt_share.next, struct mount, mnt_share);
 }
 
-static inline struct vfsmount *first_slave(struct vfsmount *p)
+static inline struct mount *first_slave(struct mount *p)
 {
-        return list_entry(p->mnt_slave_list.next, struct vfsmount, mnt_slave);
+        return list_entry(p->mnt_slave_list.next, struct mount, mnt_slave);
 }
 
-static inline struct vfsmount *next_slave(struct vfsmount *p)
+static inline struct mount *next_slave(struct mount *p)
 {
-        return list_entry(p->mnt_slave.next, struct vfsmount, mnt_slave);
+        return list_entry(p->mnt_slave.next, struct mount, mnt_slave);
 }
 
-/*
- * Return true if path is reachable from root
- *
- * namespace_sem is held, and mnt is attached
- */
-static bool is_path_reachable(struct vfsmount *mnt, struct dentry *dentry,
-                         const struct path *root)
-{
-        while (mnt != root->mnt && mnt->mnt_parent != mnt) {
-                dentry = mnt->mnt_mountpoint;
-                mnt = mnt->mnt_parent;
-        }
-        return mnt == root->mnt && is_subdir(dentry, root->dentry);
-}
-
-static struct vfsmount *get_peer_under_root(struct vfsmount *mnt,
-                                            struct mnt_namespace *ns,
-                                            const struct path *root)
+static struct mount *get_peer_under_root(struct mount *mnt,
+                                         struct mnt_namespace *ns,
+                                         const struct path *root)
 {
-        struct vfsmount *m = mnt;
+        struct mount *m = mnt;
 
         do {
                 /* Check the namespace first for optimization */
-                if (m->mnt_ns == ns && is_path_reachable(m, m->mnt_root, root))
+                if (m->mnt_ns == ns && is_path_reachable(m, m->mnt.mnt_root, root))
                         return m;
 
                 m = next_peer(m);
@@ -66,12 +51,12 @@ static struct vfsmount *get_peer_under_root(struct vfsmount *mnt,
  *
  * Caller must hold namespace_sem
  */
-int get_dominating_id(struct vfsmount *mnt, const struct path *root)
+int get_dominating_id(struct mount *mnt, const struct path *root)
 {
-        struct vfsmount *m;
+        struct mount *m;
 
         for (m = mnt->mnt_master; m != NULL; m = m->mnt_master) {
-                struct vfsmount *d = get_peer_under_root(m, mnt->mnt_ns, root);
+                struct mount *d = get_peer_under_root(m, mnt->mnt_ns, root);
                 if (d)
                         return d->mnt_group_id;
         }
@@ -79,10 +64,10 @@ int get_dominating_id(struct vfsmount *mnt, const struct path *root)
         return 0;
 }
 
-static int do_make_slave(struct vfsmount *mnt)
+static int do_make_slave(struct mount *mnt)
 {
-        struct vfsmount *peer_mnt = mnt, *master = mnt->mnt_master;
-        struct vfsmount *slave_mnt;
+        struct mount *peer_mnt = mnt, *master = mnt->mnt_master;
+        struct mount *slave_mnt;
 
         /*
          * slave 'mnt' to a peer mount that has the
@@ -90,7 +75,7 @@ static int do_make_slave(struct vfsmount *mnt)
          * slave it to anything that is available.
          */
         while ((peer_mnt = next_peer(peer_mnt)) != mnt &&
-               peer_mnt->mnt_root != mnt->mnt_root) ;
+               peer_mnt->mnt.mnt_root != mnt->mnt.mnt_root) ;
 
         if (peer_mnt == mnt) {
                 peer_mnt = next_peer(mnt);
@@ -116,7 +101,7 @@ static int do_make_slave(struct vfsmount *mnt)
                 struct list_head *p = &mnt->mnt_slave_list;
                 while (!list_empty(p)) {
                         slave_mnt = list_first_entry(p,
-                                        struct vfsmount, mnt_slave);
+                                        struct mount, mnt_slave);
                         list_del_init(&slave_mnt->mnt_slave);
                         slave_mnt->mnt_master = NULL;
                 }
@@ -129,7 +114,7 @@ static int do_make_slave(struct vfsmount *mnt)
 /*
  * vfsmount lock must be held for write
  */
-void change_mnt_propagation(struct vfsmount *mnt, int type)
+void change_mnt_propagation(struct mount *mnt, int type)
 {
         if (type == MS_SHARED) {
                 set_mnt_shared(mnt);
@@ -140,9 +125,9 @@ void change_mnt_propagation(struct vfsmount *mnt, int type)
                 list_del_init(&mnt->mnt_slave);
                 mnt->mnt_master = NULL;
                 if (type == MS_UNBINDABLE)
-                        mnt->mnt_flags |= MNT_UNBINDABLE;
+                        mnt->mnt.mnt_flags |= MNT_UNBINDABLE;
                 else
-                        mnt->mnt_flags &= ~MNT_UNBINDABLE;
+                        mnt->mnt.mnt_flags &= ~MNT_UNBINDABLE;
         }
 }
 
@@ -156,20 +141,19 @@ void change_mnt_propagation(struct vfsmount *mnt, int type)
  * vfsmount found while iterating with propagation_next() is
  * a peer of one we'd found earlier.
  */
-static struct vfsmount *propagation_next(struct vfsmount *m,
-                                         struct vfsmount *origin)
+static struct mount *propagation_next(struct mount *m,
+                                         struct mount *origin)
 {
         /* are there any slaves of this mount? */
         if (!IS_MNT_NEW(m) && !list_empty(&m->mnt_slave_list))
                 return first_slave(m);
 
         while (1) {
-                struct vfsmount *next;
-                struct vfsmount *master = m->mnt_master;
+                struct mount *master = m->mnt_master;
 
                 if (master == origin->mnt_master) {
-                        next = next_peer(m);
-                        return ((next == origin) ? NULL : next);
+                        struct mount *next = next_peer(m);
+                        return (next == origin) ? NULL : next;
                 } else if (m->mnt_slave.next != &master->mnt_slave_list)
                         return next_slave(m);
 
@@ -187,13 +171,13 @@ static struct vfsmount *propagation_next(struct vfsmount *m,
  * @type        return CL_SLAVE if the new mount has to be
  *              cloned as a slave.
  */
-static struct vfsmount *get_source(struct vfsmount *dest,
-                                        struct vfsmount *last_dest,
-                                        struct vfsmount *last_src,
-                                        int *type)
+static struct mount *get_source(struct mount *dest,
+                                struct mount *last_dest,
+                                struct mount *last_src,
+                                int *type)
 {
-        struct vfsmount *p_last_src = NULL;
-        struct vfsmount *p_last_dest = NULL;
+        struct mount *p_last_src = NULL;
+        struct mount *p_last_dest = NULL;
 
         while (last_dest != dest->mnt_master) {
                 p_last_dest = last_dest;
@@ -233,33 +217,33 @@ static struct vfsmount *get_source(struct vfsmount *dest,
  * @source_mnt: source mount.
  * @tree_list : list of heads of trees to be attached.
  */
-int propagate_mnt(struct vfsmount *dest_mnt, struct dentry *dest_dentry,
-                    struct vfsmount *source_mnt, struct list_head *tree_list)
+int propagate_mnt(struct mount *dest_mnt, struct dentry *dest_dentry,
+                    struct mount *source_mnt, struct list_head *tree_list)
 {
-        struct vfsmount *m, *child;
+        struct mount *m, *child;
         int ret = 0;
-        struct vfsmount *prev_dest_mnt = dest_mnt;
-        struct vfsmount *prev_src_mnt  = source_mnt;
+        struct mount *prev_dest_mnt = dest_mnt;
+        struct mount *prev_src_mnt  = source_mnt;
         LIST_HEAD(tmp_list);
         LIST_HEAD(umount_list);
 
         for (m = propagation_next(dest_mnt, dest_mnt); m;
                         m = propagation_next(m, dest_mnt)) {
                 int type;
-                struct vfsmount *source;
+                struct mount *source;
 
                 if (IS_MNT_NEW(m))
                         continue;
 
                 source =  get_source(m, prev_dest_mnt, prev_src_mnt, &type);
 
-                if (!(child = copy_tree(source, source->mnt_root, type))) {
+                if (!(child = copy_tree(source, source->mnt.mnt_root, type))) {
                         ret = -ENOMEM;
                         list_splice(tree_list, tmp_list.prev);
                         goto out;
                 }
 
-                if (is_subdir(dest_dentry, m->mnt_root)) {
+                if (is_subdir(dest_dentry, m->mnt.mnt_root)) {
                         mnt_set_mountpoint(m, dest_dentry, child);
                         list_add_tail(&child->mnt_hash, tree_list);
                 } else {
@@ -275,7 +259,7 @@ int propagate_mnt(struct vfsmount *dest_mnt, struct dentry *dest_dentry,
 out:
         br_write_lock(vfsmount_lock);
         while (!list_empty(&tmp_list)) {
-                child = list_first_entry(&tmp_list, struct vfsmount, mnt_hash);
+                child = list_first_entry(&tmp_list, struct mount, mnt_hash);
                 umount_tree(child, 0, &umount_list);
         }
         br_write_unlock(vfsmount_lock);
@@ -286,7 +270,7 @@ out:
 /*
  * return true if the refcount is greater than count
  */
-static inline int do_refcount_check(struct vfsmount *mnt, int count)
+static inline int do_refcount_check(struct mount *mnt, int count)
 {
         int mycount = mnt_get_count(mnt) - mnt->mnt_ghosts;
         return (mycount > count);
@@ -302,10 +286,10 @@ static inline int do_refcount_check(struct vfsmount *mnt, int count)
  *
  * vfsmount lock must be held for write
  */
-int propagate_mount_busy(struct vfsmount *mnt, int refcnt)
+int propagate_mount_busy(struct mount *mnt, int refcnt)
 {
-        struct vfsmount *m, *child;
-        struct vfsmount *parent = mnt->mnt_parent;
+        struct mount *m, *child;
+        struct mount *parent = mnt->mnt_parent;
         int ret = 0;
 
         if (mnt == parent)
@@ -321,7 +305,7 @@ int propagate_mount_busy(struct vfsmount *mnt, int refcnt)
 
         for (m = propagation_next(parent, parent); m;
                         m = propagation_next(m, parent)) {
-                child = __lookup_mnt(m, mnt->mnt_mountpoint, 0);
+                child = __lookup_mnt(&m->mnt, mnt->mnt_mountpoint, 0);
                 if (child && list_empty(&child->mnt_mounts) &&
                     (ret = do_refcount_check(child, 1)))
                         break;
@@ -333,17 +317,17 @@ int propagate_mount_busy(struct vfsmount *mnt, int refcnt)
  * NOTE: unmounting 'mnt' naturally propagates to all other mounts its
  * parent propagates to.
  */
-static void __propagate_umount(struct vfsmount *mnt)
+static void __propagate_umount(struct mount *mnt)
 {
-        struct vfsmount *parent = mnt->mnt_parent;
-        struct vfsmount *m;
+        struct mount *parent = mnt->mnt_parent;
+        struct mount *m;
 
         BUG_ON(parent == mnt);
 
         for (m = propagation_next(parent, parent); m;
                         m = propagation_next(m, parent)) {
 
-                struct vfsmount *child = __lookup_mnt(m,
+                struct mount *child = __lookup_mnt(&m->mnt,
                                         mnt->mnt_mountpoint, 0);
                 /*
                  * umount the child only if the child has no
@@ -363,7 +347,7 @@ static void __propagate_umount(struct vfsmount *mnt)
  */
 int propagate_umount(struct list_head *list)
 {
-        struct vfsmount *mnt;
+        struct mount *mnt;
 
         list_for_each_entry(mnt, list, mnt_hash)
                 __propagate_umount(mnt);