diff options
| author | Al Viro <viro@zeniv.linux.org.uk> | 2014-11-01 05:00:23 +0100 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2014-12-04 20:33:24 +0100 |
| commit | 58be28256d98a6b996b20f49130ea11afb8de75a (patch) | |
| tree | 34e4a64998fdac7d61199df862f51c3d9995c469 /fs | |
| parent | common object embedded into various struct ....ns (diff) | |
| download | linux-58be28256d98a6b996b20f49130ea11afb8de75a.tar.xz linux-58be28256d98a6b996b20f49130ea11afb8de75a.zip | |
make mntns ->get()/->put()/->install()/->inum() work with &mnt_ns->ns
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/namespace.c | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/fs/namespace.c b/fs/namespace.c index adc2ea2532a0..5c21fdadabe4 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -1582,6 +1582,11 @@ static bool is_mnt_ns_file(struct dentry *dentry) return true; } +struct mnt_namespace *to_mnt_ns(struct ns_common *ns) +{ + return container_of(ns, struct mnt_namespace, ns); +} + static bool mnt_ns_loop(struct dentry *dentry) { /* Could bind mounting the mount namespace inode cause a @@ -1591,7 +1596,7 @@ static bool mnt_ns_loop(struct dentry *dentry) if (!is_mnt_ns_file(dentry)) return false; - mnt_ns = get_proc_ns(dentry->d_inode)->ns; + mnt_ns = to_mnt_ns(get_proc_ns(dentry->d_inode)->ns); return current->nsproxy->mnt_ns->seq >= mnt_ns->seq; } @@ -3146,14 +3151,14 @@ found: static void *mntns_get(struct task_struct *task) { - struct mnt_namespace *ns = NULL; + struct ns_common *ns = NULL; struct nsproxy *nsproxy; task_lock(task); nsproxy = task->nsproxy; if (nsproxy) { - ns = nsproxy->mnt_ns; - get_mnt_ns(ns); + ns = &nsproxy->mnt_ns->ns; + get_mnt_ns(to_mnt_ns(ns)); } task_unlock(task); @@ -3162,13 +3167,13 @@ static void *mntns_get(struct task_struct *task) static void mntns_put(void *ns) { - put_mnt_ns(ns); + put_mnt_ns(to_mnt_ns(ns)); } static int mntns_install(struct nsproxy *nsproxy, void *ns) { struct fs_struct *fs = current->fs; - struct mnt_namespace *mnt_ns = ns; + struct mnt_namespace *mnt_ns = to_mnt_ns(ns); struct path root; if (!ns_capable(mnt_ns->user_ns, CAP_SYS_ADMIN) || @@ -3200,8 +3205,8 @@ static int mntns_install(struct nsproxy *nsproxy, void *ns) static unsigned int mntns_inum(void *ns) { - struct mnt_namespace *mnt_ns = ns; - return mnt_ns->ns.inum; + struct ns_common *p = ns; + return p->inum; } const struct proc_ns_operations mntns_operations = { |