vfs: move mnt_list to struct mount

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

diff --git a/fs/mount.h b/fs/mount.h
index 9217e03ba5e7b0371c3611636cd5b3c9c248cd3d..7060d2a6f80288cd7e77e99e4d1b72fa5bbf27ae 100644 (file)
--- a/fs/mount.h
+++ b/fs/mount.h
@@ -19,7 +19,8 @@ struct mount {
 #endif
        struct list_head mnt_mounts;    /* list of children, anchored here */
        struct list_head mnt_child;     /* and going through their mnt_child */
-       /* yet to be moved - up to mnt_list */
+       /* yet to be moved - up to mnt_devname */
+       struct list_head mnt_list;
        struct list_head mnt_expire;    /* link in fs-specific expiry list */
        struct list_head mnt_share;     /* circular list of shared mounts */
        struct list_head mnt_slave_list;/* list of slave mounts */

diff --git a/fs/namespace.c b/fs/namespace.c
index bbe24defcac7ec281cba466c80c1e2aa5898357d..e15125356ac1bc8e075e6a36be72d209d108ec27 100644 (file)
--- 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;
 }

diff --git a/include/linux/mount.h b/include/linux/mount.h
index 080e3088ca81fbfe5c6ff60342b8df6a33da0dd0..16ae3d46b30a57095d3570014da15e594146921f 100644 (file)
--- a/include/linux/mount.h
+++ b/include/linux/mount.h
@@ -57,7 +57,6 @@ struct vfsmount {
        struct hlist_head mnt_fsnotify_marks;
 #endif
        const char *mnt_devname;        /* Name of device e.g. /dev/dsk/hda1 */
-       struct list_head mnt_list;
 };
 
 struct file; /* forward dec */