diff options
| author | Cedric Le Goater <clg@fr.ibm.com> | 2006-12-08 02:37:59 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.osdl.org> | 2006-12-08 08:28:52 -0800 |
| commit | 9a575a92db3312a40cdf0b0406d88de88ad9741e (patch) | |
| tree | 0b789528da13cd31f7fb206f184cfa123cc0ba42 /include | |
| parent | 61a58c6c238cc81f7742b8cc84212cc55fb57747 (diff) | |
| download | lwn-9a575a92db3312a40cdf0b0406d88de88ad9741e.tar.gz lwn-9a575a92db3312a40cdf0b0406d88de88ad9741e.zip | |
[PATCH] to nsproxy
Add the pid namespace framework to the nsproxy object. The copy of the pid
namespace only increases the refcount on the global pid namespace,
init_pid_ns, and unshare is not implemented.
There is no configuration option to activate or deactivate this feature
because this not relevant for the moment.
Signed-off-by: Cedric Le Goater <clg@fr.ibm.com>
Cc: Kirill Korotaev <dev@openvz.org>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Herbert Poetzl <herbert@13thfloor.at>
Cc: Sukadev Bhattiprolu <sukadev@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/init_task.h | 2 | ||||
| -rw-r--r-- | include/linux/nsproxy.h | 2 | ||||
| -rw-r--r-- | include/linux/pid_namespace.h | 20 |
3 files changed, 22 insertions, 2 deletions
diff --git a/include/linux/init_task.h b/include/linux/init_task.h index 90c5f9a07730..7272ff9ee77c 100644 --- a/include/linux/init_task.h +++ b/include/linux/init_task.h @@ -7,6 +7,7 @@ #include <linux/utsname.h> #include <linux/lockdep.h> #include <linux/ipc.h> +#include <linux/pid_namespace.h> #define INIT_FDTABLE \ { \ @@ -73,6 +74,7 @@ extern struct nsproxy init_nsproxy; #define INIT_NSPROXY(nsproxy) { \ + .pid_ns = &init_pid_ns, \ .count = ATOMIC_INIT(1), \ .nslock = __SPIN_LOCK_UNLOCKED(nsproxy.nslock), \ .id = 0, \ diff --git a/include/linux/nsproxy.h b/include/linux/nsproxy.h index 27f37c1ec1d9..fdfb0e44912f 100644 --- a/include/linux/nsproxy.h +++ b/include/linux/nsproxy.h @@ -7,6 +7,7 @@ struct mnt_namespace; struct uts_namespace; struct ipc_namespace; +struct pid_namespace; /* * A structure to contain pointers to all per-process @@ -27,6 +28,7 @@ struct nsproxy { struct uts_namespace *uts_ns; struct ipc_namespace *ipc_ns; struct mnt_namespace *mnt_ns; + struct pid_namespace *pid_ns; }; extern struct nsproxy init_nsproxy; diff --git a/include/linux/pid_namespace.h b/include/linux/pid_namespace.h index 54d79095e295..76e7c6b2cf33 100644 --- a/include/linux/pid_namespace.h +++ b/include/linux/pid_namespace.h @@ -5,6 +5,8 @@ #include <linux/mm.h> #include <linux/threads.h> #include <linux/pid.h> +#include <linux/nsproxy.h> +#include <linux/kref.h> struct pidmap { atomic_t nr_free; @@ -14,10 +16,24 @@ struct pidmap { #define PIDMAP_ENTRIES ((PID_MAX_LIMIT + 8*PAGE_SIZE - 1)/PAGE_SIZE/8) struct pid_namespace { - struct pidmap pidmap[PIDMAP_ENTRIES]; - int last_pid; + struct kref kref; + struct pidmap pidmap[PIDMAP_ENTRIES]; + int last_pid; }; extern struct pid_namespace init_pid_ns; +static inline void get_pid_ns(struct pid_namespace *ns) +{ + kref_get(&ns->kref); +} + +extern int copy_pid_ns(int flags, struct task_struct *tsk); +extern void free_pid_ns(struct kref *kref); + +static inline void put_pid_ns(struct pid_namespace *ns) +{ + kref_put(&ns->kref, free_pid_ns); +} + #endif /* _LINUX_PID_NS_H */ |