From 0a5eb7c8189922e86a840972cd0b57e41de6f031 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Sun, 22 Sep 2013 19:37:01 -0700 Subject: vfs: Keep a list of mounts on a mount point To spot any possible problems call BUG if a mountpoint is put when it's list of mounts is not empty. AV: use hlist instead of list_head Reviewed-by: Miklos Szeredi Signed-off-by: Eric W. Biederman Signed-off-by: Al Viro --- fs/mount.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'fs/mount.h') diff --git a/fs/mount.h b/fs/mount.h index 8c6a2a651254..68bb03ed7f19 100644 --- a/fs/mount.h +++ b/fs/mount.h @@ -21,6 +21,7 @@ struct mnt_pcp { struct mountpoint { struct hlist_node m_hash; struct dentry *m_dentry; + struct hlist_head m_list; int m_count; }; @@ -51,6 +52,7 @@ struct mount { struct mount *mnt_master; /* slave is on master->mnt_slave_list */ struct mnt_namespace *mnt_ns; /* containing namespace */ struct mountpoint *mnt_mp; /* where is it mounted */ + struct hlist_node mnt_mp_list; /* list mounts with the same mountpoint */ #ifdef CONFIG_FSNOTIFY struct hlist_head mnt_fsnotify_marks; __u32 mnt_fsnotify_mask; -- cgit v1.2.3