|
Packit |
6c4009 |
/* Common definition for tst-cancel4_* tests.
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
Copyright (C) 2016-2018 Free Software Foundation, Inc.
|
|
Packit |
6c4009 |
This file is part of the GNU C Library.
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
The GNU C Library is free software; you can redistribute it and/or
|
|
Packit |
6c4009 |
modify it under the terms of the GNU Lesser General Public
|
|
Packit |
6c4009 |
License as published by the Free Software Foundation; either
|
|
Packit |
6c4009 |
version 2.1 of the License, or (at your option) any later version.
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
The GNU C Library is distributed in the hope that it will be useful,
|
|
Packit |
6c4009 |
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
Packit |
6c4009 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Packit |
6c4009 |
Lesser General Public License for more details.
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
You should have received a copy of the GNU Lesser General Public
|
|
Packit |
6c4009 |
License along with the GNU C Library; if not, see
|
|
Packit |
6c4009 |
<http://www.gnu.org/licenses/>. */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
#include <pthread.h>
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
#include <support/check.h>
|
|
Packit |
6c4009 |
#include <support/xthread.h>
|
|
Packit |
6c4009 |
#include <support/xunistd.h>
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
/* Pipe descriptors. */
|
|
Packit |
6c4009 |
static int fds[2];
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
/* Temporary file descriptor, to be closed after each round. */
|
|
Packit |
6c4009 |
static int tempfd = -1;
|
|
Packit |
6c4009 |
static int tempfd2 = -1;
|
|
Packit |
6c4009 |
/* Name of temporary file to be removed after each round. */
|
|
Packit |
6c4009 |
static char *tempfname;
|
|
Packit |
6c4009 |
/* Temporary message queue. */
|
|
Packit |
6c4009 |
static int tempmsg = -1;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
/* Often used barrier for two threads. */
|
|
Packit |
6c4009 |
static pthread_barrier_t b2;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
/* The WRITE_BUFFER_SIZE value needs to be chosen such that if we set
|
|
Packit |
6c4009 |
the socket send buffer size to '1', a write of this size on that
|
|
Packit |
6c4009 |
socket will block.
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
The Linux kernel imposes a minimum send socket buffer size which
|
|
Packit |
6c4009 |
has changed over the years. As of Linux 3.10 the value is:
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
2 * (2048 + SKB_DATA_ALIGN(sizeof(struct sk_buff)))
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
which is attempting to make sure that with standard MTUs,
|
|
Packit |
6c4009 |
TCP can always queue up at least 2 full sized packets.
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
Furthermore, there is logic in the socket send paths that
|
|
Packit |
6c4009 |
will allow one more packet (of any size) to be queued up as
|
|
Packit |
6c4009 |
long as some socket buffer space remains. Blocking only
|
|
Packit |
6c4009 |
occurs when we try to queue up a new packet and the send
|
|
Packit |
6c4009 |
buffer space has already been fully consumed.
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
Therefore we must set this value to the largest possible value of
|
|
Packit |
6c4009 |
the formula above (and since it depends upon the size of "struct
|
|
Packit |
6c4009 |
sk_buff", it is dependent upon machine word size etc.) plus some
|
|
Packit |
6c4009 |
slack space. */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
#define WRITE_BUFFER_SIZE 16384
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
/* Set the send buffer of socket S to 1 byte so any send operation
|
|
Packit |
6c4009 |
done with WRITE_BUFFER_SIZE bytes will force syscall blocking. */
|
|
Packit |
6c4009 |
static void
|
|
Packit |
6c4009 |
set_socket_buffer (int s)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
int val = 1;
|
|
Packit |
6c4009 |
socklen_t len = sizeof(val);
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
TEST_VERIFY_EXIT (setsockopt (s, SOL_SOCKET, SO_SNDBUF, &val,
|
|
Packit |
6c4009 |
sizeof(val)) == 0);
|
|
Packit |
6c4009 |
TEST_VERIFY_EXIT (getsockopt (s, SOL_SOCKET, SO_SNDBUF, &val, &len) == 0);
|
|
Packit |
6c4009 |
TEST_VERIFY_EXIT (val < WRITE_BUFFER_SIZE);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
/* Cleanup handling test. */
|
|
Packit |
6c4009 |
static int cl_called;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
static void
|
|
Packit |
6c4009 |
cl (void *arg)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
++cl_called;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
/* Named pipe used to check for blocking open. It should be closed
|
|
Packit |
6c4009 |
after the cancellation handling. */
|
|
Packit |
6c4009 |
static char fifoname[] = "/tmp/tst-cancel4-fifo-XXXXXX";
|
|
Packit |
6c4009 |
static int fifofd;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
static void
|
|
Packit |
6c4009 |
__attribute__ ((used))
|
|
Packit |
6c4009 |
cl_fifo (void *arg)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
++cl_called;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
unlink (fifoname);
|
|
Packit |
6c4009 |
close (fifofd);
|
|
Packit |
6c4009 |
fifofd = -1;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
struct cancel_tests
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
const char *name;
|
|
Packit |
6c4009 |
void *(*tf) (void *);
|
|
Packit |
6c4009 |
int nb;
|
|
Packit |
6c4009 |
int only_early;
|
|
Packit |
6c4009 |
};
|
|
Packit |
6c4009 |
#define ADD_TEST(name, nbar, early) { #name, tf_##name, nbar, early }
|