diff options
Diffstat (limited to 'include/linux/sched.h')
| -rw-r--r-- | include/linux/sched.h | 31 |
1 files changed, 29 insertions, 2 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index 77e8cad3b17a..511cc4549f58 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1514,8 +1514,35 @@ extern struct task_struct init_task; extern struct mm_struct init_mm; -#define find_task_by_pid(nr) find_task_by_pid_type(PIDTYPE_PID, nr) -extern struct task_struct *find_task_by_pid_type(int type, int pid); +extern struct pid_namespace init_pid_ns; + +/* + * find a task by one of its numerical ids + * + * find_task_by_pid_type_ns(): + * it is the most generic call - it finds a task by all id, + * type and namespace specified + * find_task_by_pid_ns(): + * finds a task by its pid in the specified namespace + * find_task_by_pid_type(): + * finds a task by its global id with the specified type, e.g. + * by global session id + * find_task_by_pid(): + * finds a task by its global pid + * + * see also find_pid() etc in include/linux/pid.h + */ + +extern struct task_struct *find_task_by_pid_type_ns(int type, int pid, + struct pid_namespace *ns); + +#define find_task_by_pid_ns(nr, ns) \ + find_task_by_pid_type_ns(PIDTYPE_PID, nr, ns) +#define find_task_by_pid_type(type, nr) \ + find_task_by_pid_type_ns(type, nr, &init_pid_ns) +#define find_task_by_pid(nr) \ + find_task_by_pid_type(PIDTYPE_PID, nr) + extern void __set_special_pids(pid_t session, pid_t pgrp); /* per-UID process charging. */ |