diff options
Diffstat (limited to 'include/linux/pid.h')
| -rw-r--r-- | include/linux/pid.h | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/include/linux/pid.h b/include/linux/pid.h index 67470ade3212..c5fee61bfb4f 100644 --- a/include/linux/pid.h +++ b/include/linux/pid.h @@ -114,11 +114,33 @@ extern struct pid *find_ge_pid(int nr); extern struct pid *alloc_pid(struct pid_namespace *ns); extern void FASTCALL(free_pid(struct pid *pid)); +/* + * the helpers to get the pid's id seen from different namespaces + * + * pid_nr() : global id, i.e. the id seen from the init namespace; + * pid_vnr() : virtual id, i.e. the id seen from the namespace this pid + * belongs to. this only makes sence when called in the + * context of the task that belongs to the same namespace; + * pid_nr_ns() : id seen from the ns specified. + * + * see also task_xid_nr() etc in include/linux/sched.h + */ + static inline pid_t pid_nr(struct pid *pid) { pid_t nr = 0; if (pid) - nr = pid->nr; + nr = pid->numbers[0].nr; + return nr; +} + +pid_t pid_nr_ns(struct pid *pid, struct pid_namespace *ns); + +static inline pid_t pid_vnr(struct pid *pid) +{ + pid_t nr = 0; + if (pid) + nr = pid->numbers[pid->level].nr; return nr; } |