vfs: move mnt_list to struct mount

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 24 insertions, 23 deletions

diff --git a/fs/namespace.c b/fs/namespace.c
index bbe24defcac7..e15125356ac1 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -202,7 +202,7 @@ static struct mount *alloc_vfsmnt(const char *name)
                 INIT_LIST_HEAD(&p->mnt_hash);
                 INIT_LIST_HEAD(&p->mnt_child);
                 INIT_LIST_HEAD(&p->mnt_mounts);
-                INIT_LIST_HEAD(&mnt->mnt_list);
+                INIT_LIST_HEAD(&p->mnt_list);
                 INIT_LIST_HEAD(&p->mnt_expire);
                 INIT_LIST_HEAD(&p->mnt_share);
                 INIT_LIST_HEAD(&p->mnt_slave_list);
@@ -618,8 +618,8 @@ static void commit_tree(struct mount *mnt)
 
         BUG_ON(parent == mnt);
 
-        list_add_tail(&head, &mnt->mnt.mnt_list);
-        list_for_each_entry(m, &head, mnt.mnt_list) {
+        list_add_tail(&head, &mnt->mnt_list);
+        list_for_each_entry(m, &head, mnt_list) {
                 m->mnt_ns = n;
                 __mnt_make_longterm(m);
         }
@@ -987,7 +987,8 @@ static void show_type(struct seq_file *m, struct super_block *sb)
 
 static int show_vfsmnt(struct seq_file *m, void *v)
 {
-        struct vfsmount *mnt = list_entry(v, struct vfsmount, mnt_list);
+        struct mount *r = list_entry(v, struct mount, mnt_list);
+        struct vfsmount *mnt = &r->mnt;
         int err = 0;
         struct path mnt_path = { .dentry = mnt->mnt_root, .mnt = mnt };
 
@@ -1024,8 +1025,8 @@ const struct seq_operations mounts_op = {
 static int show_mountinfo(struct seq_file *m, void *v)
 {
         struct proc_mounts *p = m->private;
-        struct vfsmount *mnt = list_entry(v, struct vfsmount, mnt_list);
-        struct mount *r = real_mount(mnt);
+        struct mount *r = list_entry(v, struct mount, mnt_list);
+        struct vfsmount *mnt = &r->mnt;
         struct super_block *sb = mnt->mnt_sb;
         struct path mnt_path = { .dentry = mnt->mnt_root, .mnt = mnt };
         struct path root = p->root;
@@ -1092,7 +1093,8 @@ const struct seq_operations mountinfo_op = {
 
 static int show_vfsstat(struct seq_file *m, void *v)
 {
-        struct vfsmount *mnt = list_entry(v, struct vfsmount, mnt_list);
+        struct mount *r = list_entry(v, struct mount, mnt_list);
+        struct vfsmount *mnt = &r->mnt;
         struct path mnt_path = { .dentry = mnt->mnt_root, .mnt = mnt };
         int err = 0;
 
@@ -1235,7 +1237,7 @@ void umount_tree(struct mount *mnt, int propagate, struct list_head *kill)
 
         list_for_each_entry(p, &tmp_list, mnt_hash) {
                 list_del_init(&p->mnt_expire);
-                list_del_init(&p->mnt.mnt_list);
+                list_del_init(&p->mnt_list);
                 __touch_mnt_namespace(p->mnt_ns);
                 p->mnt_ns = NULL;
                 __mnt_make_shortterm(p);
@@ -1331,7 +1333,7 @@ static int do_umount(struct mount *mnt, int flags)
 
         retval = -EBUSY;
         if (flags & MNT_DETACH || !propagate_mount_busy(mnt, 2)) {
-                if (!list_empty(&mnt->mnt.mnt_list))
+                if (!list_empty(&mnt->mnt_list))
                         umount_tree(mnt, 1, &umount_list);
                 retval = 0;
         }
@@ -1451,7 +1453,7 @@ struct mount *copy_tree(struct mount *mnt, struct dentry *dentry,
                         if (!q)
                                 goto Enomem;
                         br_write_lock(vfsmount_lock);
-                        list_add_tail(&q->mnt.mnt_list, &res->mnt.mnt_list);
+                        list_add_tail(&q->mnt_list, &res->mnt_list);
                         attach_mnt(q, &path);
                         br_write_unlock(vfsmount_lock);
                 }
@@ -1492,12 +1494,12 @@ void drop_collected_mounts(struct vfsmount *mnt)
 int iterate_mounts(int (*f)(struct vfsmount *, void *), void *arg,
                    struct vfsmount *root)
 {
-        struct vfsmount *mnt;
+        struct mount *mnt;
         int res = f(root, arg);
         if (res)
                 return res;
-        list_for_each_entry(mnt, &root->mnt_list, mnt_list) {
-                res = f(mnt, arg);
+        list_for_each_entry(mnt, &real_mount(root)->mnt_list, mnt_list) {
+                res = f(&mnt->mnt, arg);
                 if (res)
                         return res;
         }
@@ -2415,7 +2417,7 @@ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns,
         }
         new_ns->root = &new->mnt;
         br_write_lock(vfsmount_lock);
-        list_add_tail(&new_ns->list, &new_ns->root->mnt_list);
+        list_add_tail(&new_ns->list, &new->mnt_list);
         br_write_unlock(vfsmount_lock);
 
         /*
@@ -2476,18 +2478,17 @@ 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)
+static struct mnt_namespace *create_mnt_ns(struct vfsmount *m)
 {
-        struct mnt_namespace *new_ns;
-
-        new_ns = alloc_mnt_ns();
+        struct mnt_namespace *new_ns = alloc_mnt_ns();
         if (!IS_ERR(new_ns)) {
-                real_mount(mnt)->mnt_ns = new_ns;
-                __mnt_make_longterm(real_mount(mnt));
-                new_ns->root = mnt;
-                list_add(&new_ns->list, &new_ns->root->mnt_list);
+                struct mount *mnt = real_mount(m);
+                mnt->mnt_ns = new_ns;
+                __mnt_make_longterm(mnt);
+                new_ns->root = m;
+                list_add(&new_ns->list, &mnt->mnt_list);
         } else {
-                mntput(mnt);
+                mntput(m);
         }
         return new_ns;
 }