111 lines
2.5 KiB
C
111 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2018 Huawei. All Rights Reserved.
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*
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* Started by nixiaoming <nixiaoming@huawei.com>
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*/
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/*\
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* [Description]
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* After fanotify_init adds flags FAN_REPORT_TID,
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* check whether the program can accurately identify which thread id
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* in the multithreaded program triggered the event.
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*/
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#define _GNU_SOURCE
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#include "config.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <errno.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/syscall.h>
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#include <pthread.h>
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#include <sys/stat.h>
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#include <linux/limits.h>
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#include "tst_test.h"
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#include "tst_safe_pthread.h"
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#ifdef HAVE_SYS_FANOTIFY_H
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#include "fanotify.h"
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#define gettid() syscall(SYS_gettid)
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static int tid;
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static int fan_report_tid_unsupported;
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void *thread_create_file(void *arg LTP_ATTRIBUTE_UNUSED)
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{
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char tid_file[64] = {0};
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tid = gettid();
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snprintf(tid_file, sizeof(tid_file), "test_tid_%d", tid);
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SAFE_FILE_PRINTF(tid_file, "1");
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pthread_exit(0);
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}
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static unsigned int tcases[] = {
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FAN_CLASS_NOTIF,
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FAN_CLASS_NOTIF | FAN_REPORT_TID
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};
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void test01(unsigned int i)
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{
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pthread_t p_id;
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struct fanotify_event_metadata event;
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int fd_notify;
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int tgid = getpid();
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tst_res(TINFO, "Test #%u: %s FAN_REPORT_TID: tgid=%d, tid=%d, event.pid=%d",
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i, (tcases[i] & FAN_REPORT_TID) ? "with" : "without",
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tgid, tid, event.pid);
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if (fan_report_tid_unsupported && (tcases[i] & FAN_REPORT_TID)) {
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FANOTIFY_INIT_FLAGS_ERR_MSG(FAN_REPORT_TID, fan_report_tid_unsupported);
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return;
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}
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fd_notify = SAFE_FANOTIFY_INIT(tcases[i], 0);
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SAFE_FANOTIFY_MARK(fd_notify, FAN_MARK_ADD,
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FAN_ALL_EVENTS | FAN_EVENT_ON_CHILD, AT_FDCWD, ".");
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SAFE_PTHREAD_CREATE(&p_id, NULL, thread_create_file, NULL);
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SAFE_READ(0, fd_notify, &event, sizeof(struct fanotify_event_metadata));
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if ((tcases[i] & FAN_REPORT_TID) && event.pid == tid)
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tst_res(TPASS, "event.pid == tid");
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else if (!(tcases[i] & FAN_REPORT_TID) && event.pid == tgid)
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tst_res(TPASS, "event.pid == tgid");
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else
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tst_res(TFAIL, "unexpected event.pid value");
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if (event.fd != FAN_NOFD)
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SAFE_CLOSE(event.fd);
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SAFE_CLOSE(fd_notify);
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SAFE_PTHREAD_JOIN(p_id, NULL);
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}
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static void setup(void)
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{
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fan_report_tid_unsupported = fanotify_init_flags_supported_by_kernel(FAN_REPORT_TID);
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}
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static struct tst_test test = {
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.setup = setup,
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.test = test01,
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.tcnt = ARRAY_SIZE(tcases),
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.needs_tmpdir = 1,
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.needs_root = 1,
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};
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#else
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TST_TEST_TCONF("system doesn't have required fanotify support");
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#endif
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