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| author | Eric W. Biederman <ebiederm@xmission.com> | 2010-03-07 18:48:39 -0800 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2011-05-10 14:35:47 -0700 |
| commit | a00eaf11a223c63fbb212369d6db69ce4c55a2d1 (patch) | |
| tree | 1c38d8591c229243cb09386a0f5b3737da421cf1 | |
| parent | 34482e89a5218f0f9317abf1cfba3bb38b5c29dd (diff) | |
| download | linux-a00eaf11a223c63fbb212369d6db69ce4c55a2d1.tar.bz2 | |
ns proc: Add support for the ipc namespace
Acked-by: Daniel Lezcano <daniel.lezcano@free.fr>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
| -rw-r--r-- | fs/proc/namespaces.c | 3 | ||||
| -rw-r--r-- | include/linux/proc_fs.h | 1 | ||||
| -rw-r--r-- | ipc/namespace.c | 37 |
3 files changed, 41 insertions, 0 deletions
diff --git a/fs/proc/namespaces.c b/fs/proc/namespaces.c index b017181f1273..f18d6d58bf79 100644 --- a/fs/proc/namespaces.c +++ b/fs/proc/namespaces.c @@ -22,6 +22,9 @@ static const struct proc_ns_operations *ns_entries[] = { #ifdef CONFIG_UTS_NS &utsns_operations, #endif +#ifdef CONFIG_IPC_NS + &ipcns_operations, +#endif }; static const struct file_operations ns_file_operations = { diff --git a/include/linux/proc_fs.h b/include/linux/proc_fs.h index 52aa89df8a6d..a23f0b72a023 100644 --- a/include/linux/proc_fs.h +++ b/include/linux/proc_fs.h @@ -267,6 +267,7 @@ struct proc_ns_operations { }; extern const struct proc_ns_operations netns_operations; extern const struct proc_ns_operations utsns_operations; +extern const struct proc_ns_operations ipcns_operations; union proc_op { int (*proc_get_link)(struct inode *, struct path *); diff --git a/ipc/namespace.c b/ipc/namespace.c index 8054c8e5faf1..ce0a647869b1 100644 --- a/ipc/namespace.c +++ b/ipc/namespace.c @@ -12,6 +12,7 @@ #include <linux/fs.h> #include <linux/mount.h> #include <linux/user_namespace.h> +#include <linux/proc_fs.h> #include "util.h" @@ -140,3 +141,39 @@ void put_ipc_ns(struct ipc_namespace *ns) free_ipc_ns(ns); } } + +static void *ipcns_get(struct task_struct *task) +{ + struct ipc_namespace *ns = NULL; + struct nsproxy *nsproxy; + + rcu_read_lock(); + nsproxy = task_nsproxy(task); + if (nsproxy) + ns = get_ipc_ns(nsproxy->ipc_ns); + rcu_read_unlock(); + + return ns; +} + +static void ipcns_put(void *ns) +{ + return put_ipc_ns(ns); +} + +static int ipcns_install(struct nsproxy *nsproxy, void *ns) +{ + /* Ditch state from the old ipc namespace */ + exit_sem(current); + put_ipc_ns(nsproxy->ipc_ns); + nsproxy->ipc_ns = get_ipc_ns(ns); + return 0; +} + +const struct proc_ns_operations ipcns_operations = { + .name = "ipc", + .type = CLONE_NEWIPC, + .get = ipcns_get, + .put = ipcns_put, + .install = ipcns_install, +}; |