136 lines
2.7 KiB
C
136 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2014 SUSE Linux. All Rights Reserved.
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*
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* Started by Jan Kara <jack@suse.cz>
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*
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* DESCRIPTION
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* Check that fanotify overflow event is properly generated
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*
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* ALGORITHM
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* Generate enough events without reading them and check that overflow
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* event is generated.
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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 <sys/stat.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <string.h>
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#include <sys/syscall.h>
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#include "tst_test.h"
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#include "fanotify.h"
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#if defined(HAVE_SYS_FANOTIFY_H)
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#include <sys/fanotify.h>
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#define MOUNT_PATH "fs_mnt"
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/* Currently this is fixed in kernel... */
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#define MAX_EVENTS 16384
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#define BUF_SIZE 256
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static char fname[BUF_SIZE];
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static int fd, fd_notify;
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struct fanotify_event_metadata event;
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void test01(void)
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{
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int i;
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int len;
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/*
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* generate events
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*/
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for (i = 0; i < MAX_EVENTS + 1; i++) {
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sprintf(fname, MOUNT_PATH"/fname_%d", i);
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fd = SAFE_OPEN(fname, O_RDWR | O_CREAT, 0644);
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SAFE_CLOSE(fd);
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}
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while (1) {
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/*
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* get list on events
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*/
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len = read(fd_notify, &event, sizeof(event));
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if (len < 0) {
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if (errno == -EAGAIN) {
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tst_res(TFAIL, "Overflow event not "
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"generated!\n");
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break;
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}
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tst_brk(TBROK | TERRNO,
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"read of notification event failed");
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break;
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}
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if (event.fd != FAN_NOFD)
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close(event.fd);
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/*
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* check events
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*/
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if (event.mask != FAN_OPEN &&
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event.mask != FAN_Q_OVERFLOW) {
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tst_res(TFAIL,
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"got event: mask=%llx (expected %llx)"
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"pid=%u fd=%d",
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(unsigned long long)event.mask,
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(unsigned long long)FAN_OPEN,
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(unsigned)event.pid, event.fd);
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break;
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}
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if (event.mask == FAN_Q_OVERFLOW) {
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if (event.fd != FAN_NOFD) {
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tst_res(TFAIL,
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"invalid overflow event: "
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"mask=%llx pid=%u fd=%d",
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(unsigned long long)event.mask,
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(unsigned)event.pid,
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event.fd);
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break;
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}
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tst_res(TPASS,
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"got event: mask=%llx pid=%u fd=%d",
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(unsigned long long)event.mask,
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(unsigned)event.pid, event.fd);
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break;
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}
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}
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}
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static void setup(void)
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{
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fd_notify = SAFE_FANOTIFY_INIT(FAN_CLASS_NOTIF | FAN_NONBLOCK,
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O_RDONLY);
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if (fanotify_mark(fd_notify, FAN_MARK_MOUNT | FAN_MARK_ADD, FAN_OPEN,
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AT_FDCWD, MOUNT_PATH) < 0) {
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tst_brk(TBROK | TERRNO,
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"fanotify_mark (%d, FAN_MARK_MOUNT | FAN_MARK_ADD, "
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"FAN_OPEN, AT_FDCWD, \".\") failed",
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fd_notify);
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}
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}
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static void cleanup(void)
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{
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if (fd_notify > 0)
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SAFE_CLOSE(fd_notify);
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}
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static struct tst_test test = {
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.test_all = test01,
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.setup = setup,
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.cleanup = cleanup,
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.needs_root = 1,
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.mount_device = 1,
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.mntpoint = MOUNT_PATH,
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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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