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authorEric W. Biederman <ebiederman@twitter.com>2013-09-23 04:37:01 +0200
committerAl Viro <viro@zeniv.linux.org.uk>2014-10-09 08:38:54 +0200
commit0a5eb7c8189922e86a840972cd0b57e41de6f031 (patch)
treeee3f026727cff4acf5d7adbd7674d4177677f12f /fs/mount.h
parentvfs: Don't allow overwriting mounts in the current mount namespace (diff)
downloadlinux-0a5eb7c8189922e86a840972cd0b57e41de6f031.tar.xz
linux-0a5eb7c8189922e86a840972cd0b57e41de6f031.zip
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 <miklos@szeredi.hu> Signed-off-by: Eric W. Biederman <ebiederman@twitter.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/mount.h')
-rw-r--r--fs/mount.h2
1 files changed, 2 insertions, 0 deletions
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;