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98 lines
2.0 KiB
98 lines
2.0 KiB
// 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 attaches and
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* detaches a loop device which should produce two change 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 "tst_test.h"
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#include "uevent.h"
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static void generate_device_events(const char *dev_path)
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{
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tst_fill_file("loop.img", 0, 1024, 1024);
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tst_res(TINFO, "Attaching device %s", dev_path);
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tst_attach_device(dev_path, "loop.img");
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tst_res(TINFO, "Detaching device %s", dev_path);
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tst_detach_device(dev_path);
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}
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static void verify_uevent(void)
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{
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int pid, fd, dev_num;
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char dev_path[1024];
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char ev_msg[1024];
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char ev_dev_path[1024];
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char ev_dev_minor[128];
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char ev_dev_name[128];
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struct uevent_desc desc = {
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.msg = ev_msg,
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.value_cnt = 7,
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.values = (const char*[]) {
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"ACTION=change",
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ev_dev_path,
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"SUBSYSTEM=block",
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"MAJOR=7",
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ev_dev_minor,
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ev_dev_name,
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"DEVTYPE=disk",
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}
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};
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dev_num = tst_find_free_loopdev(dev_path, sizeof(dev_path));
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if (dev_num < 0)
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tst_brk(TBROK, "Failed to find free loop device");
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snprintf(ev_msg, sizeof(ev_msg),
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"change@/devices/virtual/block/loop%i", dev_num);
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snprintf(ev_dev_path, sizeof(ev_dev_path),
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"DEVPATH=/devices/virtual/block/loop%i", dev_num);
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snprintf(ev_dev_minor, sizeof(ev_dev_minor), "MINOR=%i", dev_num);
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snprintf(ev_dev_name, sizeof(ev_dev_name), "DEVNAME=loop%i", dev_num);
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const struct uevent_desc *const uevents[] = {
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&desc,
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&desc,
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NULL
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};
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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_device_events(dev_path);
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wait_for_pid(pid);
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}
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static struct tst_test test = {
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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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"loop",
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NULL
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},
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.needs_root = 1
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};
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