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/linux/include/linux/
H A Dpid.h58 struct pid { struct
77 extern struct pid init_struct_pid; argument
81 struct pid *pidfd_pid(const struct file *file);
82 struct pid *pidfd_get_pid(unsigned int fd, unsigned int *flags);
84 int pidfd_prepare(struct pid *pid, unsigned int flags, struct file **ret_file);
87 static inline struct pid *get_pid(struct pid *pid) in get_pid() argument
89 if (pid) in get_pid()
90 refcount_inc(&pid->count); in get_pid()
91 return pid; in get_pid()
94 extern void put_pid(struct pid *pid);
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H A Dpidfs.h7 struct file *pidfs_alloc_file(struct pid *pid, unsigned int flags);
9 void pidfs_prepare_pid(struct pid *pid);
10 int pidfs_add_pid(struct pid *pid);
11 void pidfs_remove_pid(struct pid *pid);
17 int pidfs_register_pid(struct pid *pid);
18 void pidfs_free_pid(struct pid *pid);
/linux/tools/testing/selftests/powerpc/ptrace/
H A Dptrace-perf-hwbreak.c39 static inline long sys_ptrace(long request, pid_t pid, unsigned long addr, unsigned long data) in sys_ptrace() argument
41 return syscall(__NR_ptrace, request, pid, addr, data); in sys_ptrace()
49 static long ptrace_getregs(pid_t pid, struct pt_regs *result) in ptrace_getregs() argument
51 return sys_ptrace(PTRACE_GETREGS, pid, 0, (unsigned long)result); in ptrace_getregs()
54 static long ptrace_setregs(pid_t pid, struct pt_regs *result) in ptrace_setregs() argument
56 return sys_ptrace(PTRACE_SETREGS, pid, 0, (unsigned long)result); in ptrace_setregs()
59 static long ptrace_cont(pid_t pid, long signal) in ptrace_cont() argument
61 return sys_ptrace(PTRACE_CONT, pid, 0, signal); in ptrace_cont()
64 static long ptrace_singlestep(pid_t pid, long signal) in ptrace_singlestep() argument
66 return sys_ptrace(PTRACE_SINGLESTEP, pid, 0, signal); in ptrace_singlestep()
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/linux/kernel/
H A Dpid.c49 struct pid init_struct_pid = {
88 void put_pid(struct pid *pid) in put_pid() argument
92 if (!pid) in put_pid()
95 ns = pid->numbers[pid->level].ns; in put_pid()
96 if (refcount_dec_and_test(&pid->count)) { in put_pid()
97 pidfs_free_pid(pid); in put_pid()
98 kmem_cache_free(ns->pid_cachep, pid); in put_pid()
106 struct pid *pid = container_of(rhp, struct pid, rcu); in delayed_put_pid() local
107 put_pid(pid); in delayed_put_pid()
110 void free_pid(struct pid *pid) in free_pid() argument
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/linux/arch/powerpc/mm/book3s64/
H A Dradix_tlb.c29 unsigned int pid, in tlbiel_radix_set_isa300() argument
36 rs = ((unsigned long)pid << PPC_BITLSHIFT(31)); in tlbiel_radix_set_isa300()
100 static __always_inline void __tlbiel_pid(unsigned long pid, int set, in __tlbiel_pid() argument
107 rs = ((unsigned long)pid) << PPC_BITLSHIFT(31); in __tlbiel_pid()
116 static __always_inline void __tlbie_pid(unsigned long pid, unsigned long ric) in __tlbie_pid() argument
121 rs = pid << PPC_BITLSHIFT(31); in __tlbie_pid()
158 static __always_inline void __tlbiel_va(unsigned long va, unsigned long pid, in __tlbiel_va() argument
165 rs = pid << PPC_BITLSHIFT(31); in __tlbiel_va()
174 static __always_inline void __tlbie_va(unsigned long va, unsigned long pid, in __tlbie_va() argument
181 rs = pid << PPC_BITLSHIFT(31); in __tlbie_va()
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/linux/tools/testing/selftests/riscv/vector/
H A Dvalidate_v_ptrace.c22 pid_t pid; in TEST() local
28 pid = fork(); in TEST()
29 ASSERT_LE(0, pid) in TEST()
32 if (pid == 0) { in TEST()
47 ASSERT_EQ(0, ptrace(PTRACE_ATTACH, pid, NULL, NULL)); in TEST()
48 ASSERT_EQ(pid, waitpid(pid, &status, 0)); in TEST()
53 ASSERT_EQ(0, ptrace(PTRACE_POKEDATA, pid, &chld_lock, 0)); in TEST()
57 ASSERT_EQ(0, ptrace(PTRACE_CONT, pid, NULL, NULL)); in TEST()
58 ASSERT_EQ(pid, waitpid(pid, &status, 0)); in TEST()
72 ret = ptrace(PTRACE_GETREGSET, pid, NT_RISCV_VECTOR, &iov); in TEST()
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/linux/fs/
H A Dpidfs.c63 .key_offset = offsetof(struct pid, ino),
65 .head_offset = offsetof(struct pid, pidfs_hash),
155 void pidfs_prepare_pid(struct pid *pid) in pidfs_prepare_pid() argument
157 pid->stashed = NULL; in pidfs_prepare_pid()
158 pid->attr = NULL; in pidfs_prepare_pid()
159 pid->ino = 0; in pidfs_prepare_pid()
162 int pidfs_add_pid(struct pid *pid) in pidfs_add_pid() argument
166 pid->ino = pidfs_alloc_ino(); in pidfs_add_pid()
167 ret = rhashtable_insert_fast(&pidfs_ino_ht, &pid->pidfs_hash, in pidfs_add_pid()
170 pid->ino = 0; in pidfs_add_pid()
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/linux/tools/testing/selftests/powerpc/signal/
H A Dsigreturn_kernel.c35 pid_t pid; in fork_child() local
37 pid = fork(); in fork_child()
38 if (pid == 0) { in fork_child()
43 return pid; in fork_child()
46 static int expect_segv(pid_t pid) in expect_segv() argument
50 waitpid(pid, &child_ret, 0); in expect_segv()
62 pid_t pid; in test_sigreturn_kernel() local
73 pid = fork_child(); in test_sigreturn_kernel()
74 expect_segv(pid); in test_sigreturn_kernel()
78 pid = fork_child(); in test_sigreturn_kernel()
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/linux/tools/testing/selftests/pid_namespace/
H A Dpid_max.c41 pid_t pid; in pid_max_cb() local
70 pid = fork(); in pid_max_cb()
71 if (pid == 0) in pid_max_cb()
73 wait_for_pid(pid); in pid_max_cb()
74 if (pid > 500) { in pid_max_cb()
138 pid_t pid; in pid_max_nested_inner() local
140 pid = fork(); in pid_max_nested_inner()
141 if (pid < 0) in pid_max_nested_inner()
144 if (pid == 0) in pid_max_nested_inner()
147 wait_for_pid(pid); in pid_max_nested_inner()
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/linux/kernel/trace/
H A Dtrace_pid.c42 !trace_find_filtered_pid(filtered_pids, task->pid)) || in trace_ignore_this_task()
44 trace_find_filtered_pid(filtered_no_pids, task->pid)); in trace_ignore_this_task()
68 if (!trace_find_filtered_pid(pid_list, self->pid)) in trace_filter_add_remove_task()
74 trace_pid_list_set(pid_list, task->pid); in trace_filter_add_remove_task()
76 trace_pid_list_clear(pid_list, task->pid); in trace_filter_add_remove_task()
93 long pid = (unsigned long)v; in trace_pid_next() local
99 if (trace_pid_list_next(pid_list, pid, &next) < 0) in trace_pid_next()
102 pid = next; in trace_pid_next()
105 return (void *)(pid + 1); in trace_pid_next()
121 unsigned long pid; in trace_pid_start() local
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/linux/tools/testing/selftests/rlimits/
H A Drlimits-per-userns.c32 pid_t pid = getpid(); in setrlimit_nproc() local
38 warnx("(pid=%d): Setting RLIMIT_NPROC=%ld", pid, n); in setrlimit_nproc()
41 err(EXIT_FAILURE, "(pid=%d): setrlimit(RLIMIT_NPROC)", pid); in setrlimit_nproc()
46 pid_t pid = fork(); in fork_child() local
48 if (pid < 0) in fork_child()
51 if (pid > 0) in fork_child()
52 return pid; in fork_child()
54 pid = getpid(); in fork_child()
56 warnx("(pid=%d): New process starting ...", pid); in fork_child()
59 err(EXIT_FAILURE, "(pid=%d): prctl(PR_SET_PDEATHSIG)", pid); in fork_child()
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/linux/include/trace/events/
H A Doom.h19 __field( pid_t, pid)
25 __entry->pid = task->pid;
31 __entry->pid, __entry->comm, __entry->oom_score_adj)
82 __field(int, pid)
94 __entry->pid = task->pid;
106 __entry->pid,
119 TP_PROTO(int pid),
121 TP_ARGS(pid),
124 __field(int, pid)
128 __entry->pid = pid;
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H A Dsched.h24 __field( pid_t, pid )
29 __entry->pid = t->pid;
32 TP_printk("comm=%s pid=%d", __get_str(comm), __entry->pid)
149 __field( pid_t, pid )
156 __entry->pid = p->pid;
162 __entry->comm, __entry->pid, __entry->prio,
241 __entry->prev_pid = prev->pid;
245 __entry->next_pid = next->pid;
280 __field( pid_t, pid )
288 __entry->pid = p->pid;
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/linux/arch/um/os-Linux/
H A Dstart_up.c44 int pid = os_getpid(), ppid = getppid(); in ptrace_child() local
50 kill(pid, SIGKILL); in ptrace_child()
52 kill(pid, SIGSTOP); in ptrace_child()
60 if (sc_result == pid) in ptrace_child()
107 int pid, n, status; in start_ptraced_child() local
111 pid = fork(); in start_ptraced_child()
112 if (pid == 0) in start_ptraced_child()
114 else if (pid < 0) in start_ptraced_child()
117 CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED)); in start_ptraced_child()
124 return pid; in start_ptraced_child()
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/linux/arch/powerpc/mm/nohash/
H A Dtlb.c130 unsigned int pid; in local_flush_tlb_mm() local
133 pid = mm->context.id; in local_flush_tlb_mm()
134 if (pid != MMU_NO_CONTEXT) in local_flush_tlb_mm()
135 _tlbil_pid(pid); in local_flush_tlb_mm()
143 unsigned int pid; in __local_flush_tlb_page() local
146 pid = mm ? mm->context.id : 0; in __local_flush_tlb_page()
147 if (pid != MMU_NO_CONTEXT) in __local_flush_tlb_page()
148 _tlbil_va(vmaddr, pid, tsize, ind); in __local_flush_tlb_page()
177 unsigned int pid; member
186 _tlbil_pid(p ? p->pid : 0); in do_flush_tlb_mm_ipi()
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/linux/tools/perf/scripts/perl/
H A Drw-by-pid.pl82 foreach my $pid (sort { ($reads{$b}{bytes_read} || 0) <=>
84 my $comm = $reads{$pid}{comm} || "";
85 my $total_reads = $reads{$pid}{total_reads} || 0;
86 my $bytes_requested = $reads{$pid}{bytes_requested} || 0;
87 my $bytes_read = $reads{$pid}{bytes_read} || 0;
89 printf("%6s %-20s %10s %10s %10s\n", $pid, $comm,
101 foreach my $pid (keys %reads) {
102 foreach my $error (keys %{$reads{$pid}{errors}}) {
103 my $comm = $reads{$pid}{comm} || "";
104 my $errcount = $reads{$pid}{errors}{$error} || 0;
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/linux/drivers/gpu/drm/amd/amdkfd/
H A Dkfd_smi_events.c43 pid_t pid; member
163 static bool kfd_smi_ev_enabled(pid_t pid, struct kfd_smi_client *client, in kfd_smi_ev_enabled() argument
168 if (pid && client->pid != pid && !client->suser) in kfd_smi_ev_enabled()
174 static void add_event_to_kfifo(pid_t pid, struct kfd_node *dev, in add_event_to_kfifo() argument
182 if (!kfd_smi_ev_enabled(pid, client, smi_event)) in add_event_to_kfifo()
199 static void kfd_smi_event_add(pid_t pid, struct kfd_node *dev, in kfd_smi_event_add() argument
215 add_event_to_kfifo(pid, dev, event, fifo_in, len); in kfd_smi_event_add()
256 if (task_info->task.pid) in kfd_smi_event_update_vmfault()
258 task_info->task.pid, task_info->task.comm)); in kfd_smi_event_update_vmfault()
263 void kfd_smi_event_page_fault_start(struct kfd_node *node, pid_t pid, in kfd_smi_event_page_fault_start() argument
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/linux/tools/testing/selftests/namespaces/
H A Dcred_change_test.c33 pid_t pid; in TEST() local
52 pid = fork(); in TEST()
53 ASSERT_GE(pid, 0); in TEST()
55 if (pid == 0) { in TEST()
119 kill(pid, SIGKILL); in TEST()
120 waitpid(pid, NULL, 0); in TEST()
130 kill(pid, SIGKILL); in TEST()
131 waitpid(pid, NULL, 0); in TEST()
145 waitpid(pid, &status, 0); in TEST()
170 pid_t pid; in TEST() local
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/linux/tools/testing/selftests/cgroup/lib/
H A Dcgroup_util.c352 int pid = strtol(ptr, &ptr, 10); in cg_killall() local
354 if (pid == 0) in cg_killall()
360 if (kill(pid, SIGKILL)) in cg_killall()
387 int cg_enter(const char *cgroup, int pid) in cg_enter() argument
391 snprintf(pidbuf, sizeof(pidbuf), "%d", pid); in cg_enter()
409 int pid, retcode; in cg_run() local
411 pid = fork(); in cg_run()
412 if (pid < 0) { in cg_run()
413 return pid; in cg_run()
414 } else if (pid == 0) { in cg_run()
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/linux/arch/powerpc/mm/
H A Dmmu_decl.h31 static inline void _tlbil_pid(unsigned int pid) in _tlbil_pid() argument
34 trace_tlbia(pid); in _tlbil_pid()
36 #define _tlbil_pid_noind(pid) _tlbil_pid(pid) argument
40 extern void _tlbil_pid(unsigned int pid);
42 extern void _tlbil_pid_noind(unsigned int pid);
44 #define _tlbil_pid_noind(pid) _tlbil_pid(pid) argument
52 static inline void _tlbil_va(unsigned long address, unsigned int pid, in _tlbil_va() argument
56 trace_tlbie(0, 0, address, pid, 0, 0, 0); in _tlbil_va()
59 extern void _tlbil_va(unsigned long address, unsigned int pid,
62 extern void __tlbil_va(unsigned long address, unsigned int pid);
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/linux/tools/testing/selftests/ptrace/
H A Dget_syscall_info.c17 kill_tracee(pid_t pid) in kill_tracee() argument
19 if (!pid) in kill_tracee()
24 int rc = kill(pid, SIGKILL); in kill_tracee()
31 sys_ptrace(int request, pid_t pid, unsigned long addr, unsigned long data) in sys_ptrace() argument
33 return syscall(__NR_ptrace, request, pid, addr, data); in sys_ptrace()
38 kill_tracee(pid); \
77 pid_t pid = fork(); in TEST() local
79 ASSERT_LE(0, pid) { in TEST()
83 if (pid == 0) { in TEST()
85 pid = getpid(); in TEST()
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/linux/tools/perf/util/
H A Dthread_map.c34 struct perf_thread_map *thread_map__new_by_pid(pid_t pid) in thread_map__new_by_pid() argument
42 sprintf(name, "/proc/%d/task", pid); in thread_map__new_by_pid()
96 pid_t pid = strtol(dirent->d_name, &end, 10); in thread_map__new_all_cpus() local
101 snprintf(path, sizeof(path), "/proc/%d/task", pid); in thread_map__new_all_cpus()
104 pr_debug("scandir for %d returned empty, skipping\n", pid); in thread_map__new_all_cpus()
151 struct perf_thread_map *thread_map__new(pid_t pid, pid_t tid) in thread_map__new() argument
153 if (pid != -1) in thread_map__new()
154 return thread_map__new_by_pid(pid); in thread_map__new()
166 pid_t pid, prev_pid = INT_MAX; in thread_map__new_by_pid_str() local
174 pid = strtol(pos->s, NULL, 10); in thread_map__new_by_pid_str()
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/linux/drivers/net/wan/
H A Dhdlc_ppp.c66 u16 pid; /* protocol ID */ member
110 static inline struct proto *get_proto(struct net_device *dev, u16 pid) in get_proto() argument
114 switch (pid) { in get_proto()
126 static inline const char *proto_name(u16 pid) in proto_name() argument
128 switch (pid) { in proto_name()
202 static void ppp_tx_cp(struct net_device *dev, u16 pid, u8 code, in ppp_tx_cp() argument
215 if (pid == PID_LCP && (code == LCP_ECHO_REQ || code == LCP_ECHO_REPLY)) in ppp_tx_cp()
244 proto_name(pid), code_names[code], id, debug_buffer); in ppp_tx_cp()
247 ppp_hard_header(skb, dev, pid, NULL, NULL, 0); in ppp_tx_cp()
297 static void ppp_cp_event(struct net_device *dev, u16 pid, u16 event, u8 code, in ppp_cp_event() argument
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/linux/tools/testing/selftests/bpf/progs/
H A Dtask_kfunc_common.h25 struct task_struct *bpf_task_from_pid(s32 pid) __ksym;
32 s32 pid; in tasks_kfunc_map_value_lookup() local
35 status = bpf_probe_read_kernel(&pid, sizeof(pid), &p->pid); in tasks_kfunc_map_value_lookup()
39 return bpf_map_lookup_elem(&__tasks_kfunc_map, &pid); in tasks_kfunc_map_value_lookup()
47 s32 pid; in tasks_kfunc_map_insert() local
49 status = bpf_probe_read_kernel(&pid, sizeof(pid), &p->pid); in tasks_kfunc_map_insert()
54 status = bpf_map_update_elem(&__tasks_kfunc_map, &pid, &local, BPF_NOEXIST); in tasks_kfunc_map_insert()
58 v = bpf_map_lookup_elem(&__tasks_kfunc_map, &pid); in tasks_kfunc_map_insert()
60 bpf_map_delete_elem(&__tasks_kfunc_map, &pid); in tasks_kfunc_map_insert()
/linux/Documentation/translations/zh_CN/accounting/
H A Dtaskstats.rst23 “pid”、“tid”、“任务”互换使用，用于描述由struct task_struct定义的标准
24 Linux任务。“每pid的统计数据”等价于“每任务的统计数据”。
35 （NETLINK_GENERIC族）然后发送指定pid或tgid的命令。响应消息中包含单个
36 任务的统计信息（若指定了pid）或进程所有任务汇总的统计信息（若指定了tgid）。
39 cpu掩码内的cpu上有任务退出时，每pid的统计信息将发送给注册成功的监听者。使用
44 记录也将发送给用户空间。后者包含线程组中所有线程（包括过去和现在）的每pid统计
59 struct taskstats是每pid和每tgid数据共用的计数结构体。它是版本化的，可在内核新增
71 1. 命令：由用户发送给内核。获取指定pid/tgid数据的命令包含一个类型为
72 TASKSTATS_CMD_ATTR_PID/TGID的属性，该属性包含u32的pid或tgid载荷。
73 pid/tgid指示用户空间要统计的任务/进程。
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