diff options
Diffstat (limited to 'include/linux/pid.h')
| -rw-r--r-- | include/linux/pid.h | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/include/linux/pid.h b/include/linux/pid.h index c5fee61bfb4f..0dc940f4be46 100644 --- a/include/linux/pid.h +++ b/include/linux/pid.h @@ -99,17 +99,29 @@ extern void FASTCALL(detach_pid(struct task_struct *task, enum pid_type)); extern void FASTCALL(transfer_pid(struct task_struct *old, struct task_struct *new, enum pid_type)); +struct pid_namespace; +extern struct pid_namespace init_pid_ns; + /* * look up a PID in the hash table. Must be called with the tasklist_lock * or rcu_read_lock() held. + * + * find_pid_ns() finds the pid in the namespace specified + * find_pid() find the pid by its global id, i.e. in the init namespace + * find_vpid() finr the pid by its virtual id, i.e. in the current namespace + * + * see also find_task_by_pid() set in include/linux/sched.h */ -extern struct pid *FASTCALL(find_pid(int nr)); +extern struct pid *FASTCALL(find_pid_ns(int nr, struct pid_namespace *ns)); + +#define find_vpid(pid) find_pid_ns(pid, current->nsproxy->pid_ns) +#define find_pid(pid) find_pid_ns(pid, &init_pid_ns) /* * Lookup a PID in the hash table, and return with it's count elevated. */ extern struct pid *find_get_pid(int nr); -extern struct pid *find_ge_pid(int nr); +extern struct pid *find_ge_pid(int nr, struct pid_namespace *); extern struct pid *alloc_pid(struct pid_namespace *ns); extern void FASTCALL(free_pid(struct pid *pid)); |