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Check that SCM_XXX timestamp returned by the kernel is less 1 second

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away in the past from the current time. This should be plenty for the
scheduler to do its job. It provides assurance that the timestamp
returned is actually a valid one, not just some random garbage.
This commit is contained in:
Maxim Sobolev 2016-12-09 22:13:00 +00:00
parent 255003da42
commit 79847968f9
4 changed files with 143 additions and 1 deletions
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3
tools/regression/sockets/unix_cmsg/Makefile
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@ -4,7 +4,8 @@ PROG= unix_cmsg
SRCS= ${AUTOSRCS} unix_cmsg.c uc_common.h uc_common.c \
t_generic.h t_generic.c t_peercred.h t_peercred.c \
t_cmsgcred.h t_cmsgcred.c t_sockcred.h t_sockcred.c \
t_cmsgcred_sockcred.h t_cmsgcred_sockcred.c t_cmsg_len.h t_cmsg_len.c
t_cmsgcred_sockcred.h t_cmsgcred_sockcred.c t_cmsg_len.h t_cmsg_len.c \
uc_check_time.h uc_check_time.c
CLEANFILES+= ${AUTOSRCS}
MAN=
WARNS?= 3

4
tools/regression/sockets/unix_cmsg/t_xxxtime.c.in
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@ -39,6 +39,7 @@ __FBSDID("$FreeBSD$");
#include "t_%%TTYPE%%.h"
#include "t_generic.h"
#include "uc_common.h"
#include "uc_check_time.h"
#if defined(%%SCM_TTYPE%%)
static int
@ -51,6 +52,9 @@ check_scm_%%TTYPE%%(struct cmsghdr *cmsghdr)
bt = (struct %%DTYPE%% *)CMSG_DATA(cmsghdr);
if (uc_check_%%TTYPE%%(bt) < 0)
return (-1);
uc_dbgmsg("%%DTYPE%%.%%MAJ_MEMB%% %"PRIdMAX", %%DTYPE%%.%%MIN_MEMB%% %"PRIuMAX,
(intmax_t)bt->%%MAJ_MEMB%%, (uintmax_t)bt->%%MIN_MEMB%%);

101
tools/regression/sockets/unix_cmsg/uc_check_time.c Normal file
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@ -0,0 +1,101 @@
/*-
* Copyright (c) 2016 Maksym Sobolyev <sobomax@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/time.h>
#include <time.h>
#include "uc_check_time.h"
static const struct timeval max_diff_tv = {.tv_sec = 1, .tv_usec = 0};
static const struct timespec max_diff_ts = {.tv_sec = 1, .tv_nsec = 0};
#define timespeccmp(tvp, uvp, cmp) \
(((tvp)->tv_sec == (uvp)->tv_sec) ? \
((tvp)->tv_nsec cmp (uvp)->tv_nsec) : \
((tvp)->tv_sec cmp (uvp)->tv_sec))
#define timespecsub(vvp, uvp) \
do { \
(vvp)->tv_sec -= (uvp)->tv_sec; \
(vvp)->tv_nsec -= (uvp)->tv_nsec; \
if ((vvp)->tv_nsec < 0) { \
(vvp)->tv_sec--; \
(vvp)->tv_nsec += 1000000000; \
} \
} while (0)
int
uc_check_bintime(const struct bintime *mt)
{
struct timespec bt;
bintime2timespec(mt, &bt);
return (uc_check_timespec_real(&bt));
}
int
uc_check_timeval(const struct timeval *bt)
{
struct timeval ct, dt;
if (gettimeofday(&ct, NULL) < 0)
return (-1);
timersub(&ct, bt, &dt);
if (!timercmp(&dt, &max_diff_tv, <))
return (-1);
return (0);
}
int
uc_check_timespec_real(const struct timespec *bt)
{
struct timespec ct;
if (clock_gettime(CLOCK_REALTIME, &ct) < 0)
return (-1);
timespecsub(&ct, bt);
if (!timespeccmp(&ct, &max_diff_ts, <))
return (-1);
return (0);
}
int
uc_check_timespec_mono(const struct timespec *bt)
{
struct timespec ct;
if (clock_gettime(CLOCK_MONOTONIC, &ct) < 0)
return (-1);
timespecsub(&ct, bt);
if (!timespeccmp(&ct, &max_diff_ts, <))
return (-1);
return (0);
}

36
tools/regression/sockets/unix_cmsg/uc_check_time.h Normal file
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@ -0,0 +1,36 @@
/*-
* Copyright (c) 2016 Maksym Sobolyev <sobomax@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
struct bintime;
struct timeval;
struct timespec;
int uc_check_bintime(const struct bintime *bt);
int uc_check_timeval(const struct timeval *bt);
int uc_check_timespec_real(const struct timespec *bt);
int uc_check_timespec_mono(const struct timespec *bt);