160 lines
3.2 KiB
C
160 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2019 Cyril Hrubis <chrubis@suse.cz>
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*/
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/*
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* Very simple uevent netlink socket test.
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*
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* We fork a child that listens for a kernel events while parents creates and
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* removes a tun network device which should produce two several add and remove
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* events.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/wait.h>
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#include <sys/socket.h>
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#include <linux/if.h>
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#include <linux/if_tun.h>
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#include "tst_kconfig.h"
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#include "tst_test.h"
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#include "uevent.h"
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#define TUN_PATH "/dev/net/tun"
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#define CONFIG_RPS "CONFIG_RPS"
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#define MAX_UEVENTS 7
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static struct uevent_desc add = {
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.msg = "add@/devices/virtual/net/ltp-tun0",
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.value_cnt = 4,
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.values = (const char*[]) {
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"ACTION=add",
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"DEVPATH=/devices/virtual/net/ltp-tun0",
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"SUBSYSTEM=net",
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"INTERFACE=ltp-tun0",
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}
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};
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static struct uevent_desc add_rx = {
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.msg = "add@/devices/virtual/net/ltp-tun0/queues/rx-0",
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.value_cnt = 3,
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.values = (const char*[]) {
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"ACTION=add",
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"DEVPATH=/devices/virtual/net/ltp-tun0/queues/rx-0",
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"SUBSYSTEM=queues",
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}
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};
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static struct uevent_desc add_tx = {
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.msg = "add@/devices/virtual/net/ltp-tun0/queues/tx-0",
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.value_cnt = 3,
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.values = (const char*[]) {
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"ACTION=add",
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"DEVPATH=/devices/virtual/net/ltp-tun0/queues/tx-0",
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"SUBSYSTEM=queues",
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}
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};
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static struct uevent_desc rem_rx = {
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.msg = "remove@/devices/virtual/net/ltp-tun0/queues/rx-0",
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.value_cnt = 3,
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.values = (const char*[]) {
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"ACTION=remove",
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"DEVPATH=/devices/virtual/net/ltp-tun0/queues/rx-0",
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"SUBSYSTEM=queues",
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}
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};
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static struct uevent_desc rem_tx = {
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.msg = "remove@/devices/virtual/net/ltp-tun0/queues/tx-0",
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.value_cnt = 3,
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.values = (const char*[]) {
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"ACTION=remove",
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"DEVPATH=/devices/virtual/net/ltp-tun0/queues/tx-0",
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"SUBSYSTEM=queues",
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}
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};
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static struct uevent_desc rem = {
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.msg = "remove@/devices/virtual/net/ltp-tun0",
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.value_cnt = 4,
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.values = (const char*[]) {
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"ACTION=remove",
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"DEVPATH=/devices/virtual/net/ltp-tun0",
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"SUBSYSTEM=net",
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"INTERFACE=ltp-tun0",
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}
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};
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static const struct uevent_desc *uevents[MAX_UEVENTS];
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static void generate_tun_uevents(void)
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{
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int fd = SAFE_OPEN(TUN_PATH, O_RDWR);
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struct ifreq ifr = {
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.ifr_flags = IFF_TUN,
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.ifr_name = "ltp-tun0",
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};
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SAFE_IOCTL(fd, TUNSETIFF, (void*)&ifr);
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SAFE_IOCTL(fd, TUNSETPERSIST, 0);
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SAFE_CLOSE(fd);
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}
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static void verify_uevent(void)
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{
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int pid, fd;
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pid = SAFE_FORK();
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if (!pid) {
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fd = open_uevent_netlink();
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TST_CHECKPOINT_WAKE(0);
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wait_for_uevents(fd, uevents);
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exit(0);
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}
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TST_CHECKPOINT_WAIT(0);
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generate_tun_uevents();
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wait_for_pid(pid);
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}
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static void setup(void)
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{
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struct tst_kconfig_var kconfig = {
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.id = CONFIG_RPS,
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.id_len = sizeof(CONFIG_RPS) - 1,
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};
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int i = 0;
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tst_kconfig_read(&kconfig, 1);
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uevents[i++] = &add;
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if (kconfig.choice == 'y')
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uevents[i++] = &add_rx;
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uevents[i++] = &add_tx;
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if (kconfig.choice == 'y')
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uevents[i++] = &rem_rx;
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uevents[i++] = &rem_tx;
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uevents[i++] = &rem;
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uevents[i++] = NULL;
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}
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static struct tst_test test = {
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.setup = setup,
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.test_all = verify_uevent,
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.forks_child = 1,
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.needs_checkpoints = 1,
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.needs_drivers = (const char *const []) {
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"tun",
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NULL
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},
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.needs_root = 1
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};
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