1 /* SPDX-License-Identifier: LGPL-2.1 WITH Linux-syscall-note */ 2 /* 3 * cn_proc.h - process events connector 4 * 5 * Copyright (C) Matt Helsley, IBM Corp. 2005 6 * Based on cn_fork.h by Nguyen Anh Quynh and Guillaume Thouvenin 7 * Copyright (C) 2005 Nguyen Anh Quynh <aquynh@gmail.com> 8 * Copyright (C) 2005 Guillaume Thouvenin <guillaume.thouvenin@bull.net> 9 * 10 * This program is free software; you can redistribute it and/or modify it 11 * under the terms of version 2.1 of the GNU Lesser General Public License 12 * as published by the Free Software Foundation. 13 * 14 * This program is distributed in the hope that it would be useful, but 15 * WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 17 */ 18 19 #ifndef _UAPICN_PROC_H 20 #define _UAPICN_PROC_H 21 22 #include <linux/types.h> 23 24 /* 25 * Userspace sends this enum to register with the kernel that it is listening 26 * for events on the connector. 27 */ 28 enum proc_cn_mcast_op { 29 PROC_CN_MCAST_LISTEN = 1, 30 PROC_CN_MCAST_IGNORE = 2 31 }; 32 33 #define PROC_EVENT_ALL (PROC_EVENT_FORK | PROC_EVENT_EXEC | PROC_EVENT_UID | \ 34 PROC_EVENT_GID | PROC_EVENT_SID | PROC_EVENT_PTRACE | \ 35 PROC_EVENT_COMM | PROC_EVENT_NONZERO_EXIT | \ 36 PROC_EVENT_COREDUMP | PROC_EVENT_EXIT) 37 38 /* 39 * If you add an entry in proc_cn_event, make sure you add it in 40 * PROC_EVENT_ALL above as well. 41 */ 42 enum proc_cn_event { 43 /* Use successive bits so the enums can be used to record 44 * sets of events as well 45 */ 46 PROC_EVENT_NONE = 0x00000000, 47 PROC_EVENT_FORK = 0x00000001, 48 PROC_EVENT_EXEC = 0x00000002, 49 PROC_EVENT_UID = 0x00000004, 50 PROC_EVENT_GID = 0x00000040, 51 PROC_EVENT_SID = 0x00000080, 52 PROC_EVENT_PTRACE = 0x00000100, 53 PROC_EVENT_COMM = 0x00000200, 54 /* "next" should be 0x00000400 */ 55 /* "last" is the last process event: exit, 56 * while "next to last" is coredumping event 57 * before that is report only if process dies 58 * with non-zero exit status 59 */ 60 PROC_EVENT_NONZERO_EXIT = 0x20000000, 61 PROC_EVENT_COREDUMP = 0x40000000, 62 PROC_EVENT_EXIT = 0x80000000 63 }; 64 65 struct proc_input { 66 enum proc_cn_mcast_op mcast_op; 67 enum proc_cn_event event_type; 68 }; 69 70 static inline enum proc_cn_event valid_event(enum proc_cn_event ev_type) 71 { 72 return (enum proc_cn_event)(ev_type & PROC_EVENT_ALL); 73 } 74 75 /* 76 * From the user's point of view, the process 77 * ID is the thread group ID and thread ID is the internal 78 * kernel "pid". So, fields are assigned as follow: 79 * 80 * In user space - In kernel space 81 * 82 * parent process ID = parent->tgid 83 * parent thread ID = parent->pid 84 * child process ID = child->tgid 85 * child thread ID = child->pid 86 */ 87 88 struct proc_event { 89 enum proc_cn_event what; 90 __u32 cpu; 91 __u64 __attribute__((aligned(8))) timestamp_ns; 92 /* Number of nano seconds since system boot */ 93 union { /* must be last field of proc_event struct */ 94 struct { 95 __u32 err; 96 } ack; 97 98 struct fork_proc_event { 99 __kernel_pid_t parent_pid; 100 __kernel_pid_t parent_tgid; 101 __kernel_pid_t child_pid; 102 __kernel_pid_t child_tgid; 103 } fork; 104 105 struct exec_proc_event { 106 __kernel_pid_t process_pid; 107 __kernel_pid_t process_tgid; 108 } exec; 109 110 struct id_proc_event { 111 __kernel_pid_t process_pid; 112 __kernel_pid_t process_tgid; 113 union { 114 __u32 ruid; /* task uid */ 115 __u32 rgid; /* task gid */ 116 } r; 117 union { 118 __u32 euid; 119 __u32 egid; 120 } e; 121 } id; 122 123 struct sid_proc_event { 124 __kernel_pid_t process_pid; 125 __kernel_pid_t process_tgid; 126 } sid; 127 128 struct ptrace_proc_event { 129 __kernel_pid_t process_pid; 130 __kernel_pid_t process_tgid; 131 __kernel_pid_t tracer_pid; 132 __kernel_pid_t tracer_tgid; 133 } ptrace; 134 135 struct comm_proc_event { 136 __kernel_pid_t process_pid; 137 __kernel_pid_t process_tgid; 138 char comm[16]; 139 } comm; 140 141 struct coredump_proc_event { 142 __kernel_pid_t process_pid; 143 __kernel_pid_t process_tgid; 144 __kernel_pid_t parent_pid; 145 __kernel_pid_t parent_tgid; 146 } coredump; 147 148 struct exit_proc_event { 149 __kernel_pid_t process_pid; 150 __kernel_pid_t process_tgid; 151 __u32 exit_code, exit_signal; 152 __kernel_pid_t parent_pid; 153 __kernel_pid_t parent_tgid; 154 } exit; 155 156 } event_data; 157 }; 158 159 #endif /* _UAPICN_PROC_H */ 160