Lines Matching refs:pid
50 struct pid init_struct_pid = {
94 void put_pid(struct pid *pid) in put_pid() argument
98 if (!pid) in put_pid()
101 ns = pid->numbers[pid->level].ns; in put_pid()
102 if (refcount_dec_and_test(&pid->count)) { in put_pid()
103 pidfs_free_pid(pid); in put_pid()
104 kmem_cache_free(ns->pid_cachep, pid); in put_pid()
112 struct pid *pid = container_of(rhp, struct pid, rcu); in delayed_put_pid() local
113 put_pid(pid); in delayed_put_pid()
116 void free_pid(struct pid *pid) in free_pid() argument
123 for (i = 0; i <= pid->level; i++) { in free_pid()
124 struct upid *upid = pid->numbers + i; in free_pid()
144 pidfs_remove_pid(pid); in free_pid()
147 call_rcu(&pid->rcu, delayed_put_pid); in free_pid()
150 void free_pids(struct pid **pids) in free_pids()
162 struct pid *alloc_pid(struct pid_namespace *ns, pid_t *set_tid, in alloc_pid()
165 struct pid *pid; in alloc_pid() local
183 pid = kmem_cache_alloc(ns->pid_cachep, GFP_KERNEL); in alloc_pid()
184 if (!pid) in alloc_pid()
188 pid->level = ns->level; in alloc_pid()
248 pid->numbers[i].nr = nr; in alloc_pid()
249 pid->numbers[i].ns = tmp; in alloc_pid()
264 refcount_set(&pid->count, 1); in alloc_pid()
265 spin_lock_init(&pid->lock); in alloc_pid()
267 INIT_HLIST_HEAD(&pid->tasks[type]); in alloc_pid()
269 init_waitqueue_head(&pid->wait_pidfd); in alloc_pid()
270 INIT_HLIST_HEAD(&pid->inodes); in alloc_pid()
272 upid = pid->numbers + ns->level; in alloc_pid()
277 pidfs_add_pid(pid); in alloc_pid()
278 for ( ; upid >= pid->numbers; --upid) { in alloc_pid()
280 idr_replace(&upid->ns->idr, pid, upid->nr); in alloc_pid()
286 return pid; in alloc_pid()
296 upid = pid->numbers + i; in alloc_pid()
306 kmem_cache_free(ns->pid_cachep, pid); in alloc_pid()
317 struct pid *find_pid_ns(int nr, struct pid_namespace *ns) in find_pid_ns()
323 struct pid *find_vpid(int nr) in find_vpid()
329 static struct pid **task_pid_ptr(struct task_struct *task, enum pid_type type) in task_pid_ptr()
341 struct pid *pid; in attach_pid() local
345 pid = *task_pid_ptr(task, type); in attach_pid()
346 hlist_add_head_rcu(&task->pid_links[type], &pid->tasks[type]); in attach_pid()
349 static void __change_pid(struct pid **pids, struct task_struct *task, in __change_pid()
350 enum pid_type type, struct pid *new) in __change_pid()
352 struct pid **pid_ptr, *pid; in __change_pid() local
358 pid = *pid_ptr; in __change_pid()
364 if (pid_has_task(pid, tmp)) in __change_pid()
368 pids[type] = pid; in __change_pid()
371 void detach_pid(struct pid **pids, struct task_struct *task, enum pid_type type) in detach_pid()
376 void change_pid(struct pid **pids, struct task_struct *task, enum pid_type type, in change_pid()
377 struct pid *pid) in change_pid() argument
379 __change_pid(pids, task, type, pid); in change_pid()
385 struct pid *pid1 = left->thread_pid; in exchange_tids()
386 struct pid *pid2 = right->thread_pid; in exchange_tids()
400 WRITE_ONCE(left->pid, pid_nr(pid2)); in exchange_tids()
401 WRITE_ONCE(right->pid, pid_nr(pid1)); in exchange_tids()
413 struct task_struct *pid_task(struct pid *pid, enum pid_type type) in pid_task() argument
416 if (pid) { in pid_task()
418 first = rcu_dereference_check(hlist_first_rcu(&pid->tasks[type]), in pid_task()
455 struct pid *get_task_pid(struct task_struct *task, enum pid_type type) in get_task_pid()
457 struct pid *pid; in get_task_pid() local
459 pid = get_pid(rcu_dereference(*task_pid_ptr(task, type))); in get_task_pid()
461 return pid; in get_task_pid()
465 struct task_struct *get_pid_task(struct pid *pid, enum pid_type type) in get_pid_task() argument
469 result = pid_task(pid, type); in get_pid_task()
477 struct pid *find_get_pid(pid_t nr) in find_get_pid()
479 struct pid *pid; in find_get_pid() local
482 pid = get_pid(find_vpid(nr)); in find_get_pid()
485 return pid; in find_get_pid()
489 pid_t pid_nr_ns(struct pid *pid, struct pid_namespace *ns) in pid_nr_ns() argument
494 if (pid && ns->level <= pid->level) { in pid_nr_ns()
495 upid = &pid->numbers[ns->level]; in pid_nr_ns()
503 pid_t pid_vnr(struct pid *pid) in pid_vnr() argument
505 return pid_nr_ns(pid, task_active_pid_ns(current)); in pid_vnr()
535 struct pid *find_ge_pid(int nr, struct pid_namespace *ns) in find_ge_pid()
541 struct pid *pidfd_get_pid(unsigned int fd, unsigned int *flags) in pidfd_get_pid()
544 struct pid *pid; in pidfd_get_pid() local
549 pid = pidfd_pid(fd_file(f)); in pidfd_get_pid()
550 if (!IS_ERR(pid)) { in pidfd_get_pid()
551 get_pid(pid); in pidfd_get_pid()
554 return pid; in pidfd_get_pid()
572 struct pid *pid; in pidfd_get_task() local
579 pid = get_task_pid(current, type); in pidfd_get_task()
583 pid = get_task_pid(current, type); in pidfd_get_task()
586 pid = pidfd_get_pid(pidfd, &f_flags); in pidfd_get_task()
587 if (IS_ERR(pid)) in pidfd_get_task()
588 return ERR_CAST(pid); in pidfd_get_task()
593 task = get_pid_task(pid, type); in pidfd_get_task()
594 put_pid(pid); in pidfd_get_task()
618 static int pidfd_create(struct pid *pid, unsigned int flags) in pidfd_create() argument
623 pidfd = pidfd_prepare(pid, flags, &pidfd_file); in pidfd_create()
644 SYSCALL_DEFINE2(pidfd_open, pid_t, pid, unsigned int, flags) in SYSCALL_DEFINE2() argument
647 struct pid *p; in SYSCALL_DEFINE2()
652 if (pid <= 0) in SYSCALL_DEFINE2()
655 p = find_get_pid(pid); in SYSCALL_DEFINE2()
719 struct pid *new_pid; in proc_do_cad_pid()
812 struct_size_t(struct pid, numbers, 1), in pid_idr_init()
813 __alignof__(struct pid), in pid_idr_init()
866 static int pidfd_getfd(struct pid *pid, int fd) in pidfd_getfd() argument
872 task = get_pid_task(pid, PIDTYPE_PID); in pidfd_getfd()
906 struct pid *pid; in SYSCALL_DEFINE3() local
916 pid = pidfd_pid(fd_file(f)); in SYSCALL_DEFINE3()
917 if (IS_ERR(pid)) in SYSCALL_DEFINE3()
918 return PTR_ERR(pid); in SYSCALL_DEFINE3()
920 return pidfd_getfd(pid, fd); in SYSCALL_DEFINE3()