blob: 66c8fd855b6362f82369de01fdf03f1710e51de7 [file] [log] [blame]
/*
* Copyright (C) 2007 Monakhov Dmitriy
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
* the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* NAME
* writev06.c
*
* DESCRIPTION
* These testcases are written to test fault in pages readable
* feature in generic write path. Because before actual write
* kernel may want check is buffer passed is realy readable.
*
* USAGE: <for command-line>
* writev06 [-c n] [-e] [-i n] [-I x] [-P x] [-t]
* where, -c n : Run n copies concurrently.
* -e : Turn on errno logging.
* -i n : Execute test n times.
* -I x : Execute test for x seconds.
* -P x : Pause for x seconds between iterations.
* -t : Turn on syscall timing.
*
* History
*
* Restrictions
* NONE
*/
#include <sys/types.h>
#include <signal.h>
#include <sys/uio.h>
#include <fcntl.h>
#include <memory.h>
#include <errno.h>
#include "test.h"
#include "usctest.h"
#include <sys/mman.h>
#define K_1 1024
#define NBUFS 2
#define MAX_IOVEC 2
#define DATA_FILE "writev_data_file"
int page_size;
char *good_addr[2] = { NULL, NULL };
char *bad_addr[2] = { NULL, NULL };
struct iovec wr_iovec[MAX_IOVEC] = {
{(caddr_t) - 1, 1},
{(caddr_t) - 1, 1}
};
/* 0 terminated list of expected errnos */
int exp_enos[] = { 0 };
char name[K_1], f_name[K_1];
int fd[2], in_sighandler;
char *TCID = "writev06";
int TST_TOTAL = 1;
void sighandler(int);
void setup(void);
void cleanup(void);
int fail;
int main(int argc, char **argv)
{
int lc;
char *msg;
if ((msg = parse_opts(argc, argv, NULL, NULL)) != NULL) {
tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
}
setup(); /* set "tstdir", and "testfile" vars */
/* The following loop checks looping state if -i option given */
for (lc = 0; TEST_LOOPING(lc); lc++) {
/* reset tst_count in case we are looping */
tst_count = 0;
fd[1] = -1; /* Invalid file descriptor */
if (signal(SIGTERM, sighandler) == SIG_ERR) {
perror("signal");
tst_resm(TFAIL, "signal() SIGTERM FAILED");
cleanup();
}
if (signal(SIGPIPE, sighandler) == SIG_ERR) {
perror("signal");
tst_resm(TFAIL, "signal() SIGPIPE FAILED");
cleanup();
}
if ((fd[0] = open(f_name, O_WRONLY | O_CREAT, 0666)) < 0) {
tst_resm(TFAIL, "open(2) failed: fname = %s, "
"errno = %d", f_name, errno);
cleanup();
}
/*
* Iovecs passed to writev points to valid (readable) regions,
* so all bytes must be successfully written.
*/
//block1:
tst_resm(TINFO, "Enter block 1");
fail = 0;
TEST(writev(fd[0], wr_iovec, 2));
if (TEST_RETURN >= 0) {
if (TEST_RETURN == 2) {
tst_resm(TINFO,
"writev returned %d as expected", 2);
} else {
tst_resm(TFAIL, "Expected nbytes = %d, got "
"%ld", 2, TEST_RETURN);
fail = 1;
}
} else {
TEST_ERROR_LOG(TEST_ERRNO);
tst_resm(TFAIL | TTERRNO,
"Error writev return value = %ld",
TEST_RETURN);
fail = 1;
}
if (fail) {
tst_resm(TINFO, "block 1 FAILED");
} else {
tst_resm(TINFO, "block 1 PASSED");
}
tst_resm(TINFO, "Exit block 1");
}
cleanup();
tst_exit();
}
/*
* setup()
* performs all ONE TIME setup for this test
*/
void setup(void)
{
tst_sig(FORK, DEF_HANDLER, cleanup);
TEST_EXP_ENOS(exp_enos);
/* Pause if that option was specified.
* TEST_PAUSE contains the code to fork the test with the -i option.
* You want to make sure you do this before you create your temporary
* directory.
*/
TEST_PAUSE;
/* Create a unique temporary directory and chdir() to it. */
tst_tmpdir();
strcpy(name, DATA_FILE);
sprintf(f_name, "%s.%d", name, getpid());
page_size = getpagesize();
/* Crate two readable and writeble mappings with non reabable
* mapping around */
bad_addr[0] = mmap(NULL, page_size * 3, PROT_NONE,
MAP_PRIVATE_EXCEPT_UCLINUX | MAP_ANONYMOUS, 0, 0);
if (bad_addr[0] == MAP_FAILED)
tst_brkm(TBROK, cleanup, "mmap failed for bad_addr[0]");
good_addr[0] = mmap(NULL, page_size, PROT_READ | PROT_WRITE,
MAP_PRIVATE_EXCEPT_UCLINUX | MAP_ANONYMOUS, 0, 0);
if (good_addr[0] == MAP_FAILED)
tst_brkm(TBROK, cleanup, "mmap failed for good_addr[0]");
bad_addr[1] = mmap(NULL, page_size * 3, PROT_NONE,
MAP_PRIVATE_EXCEPT_UCLINUX | MAP_ANONYMOUS, 0, 0);
if (bad_addr[1] == MAP_FAILED)
tst_brkm(TBROK, cleanup, "mmap failed for bad_addr[1]");
good_addr[1] = mmap(NULL, page_size, PROT_READ | PROT_WRITE,
MAP_PRIVATE_EXCEPT_UCLINUX | MAP_ANONYMOUS, 0, 0);
if (good_addr[1] == MAP_FAILED)
tst_brkm(TBROK, cleanup, "mmap failed for good_addr[1]");
/* force page fault for writable mappings */
memset(good_addr[0], 'a', page_size);
memset(good_addr[1], 'b', page_size);
wr_iovec[0].iov_base = good_addr[0] + page_size - 1;
wr_iovec[1].iov_base = good_addr[1] + page_size - 1;
}
/*
* cleanup()
* performs all ONE TIME cleanup for this test at
* completion or premature exit
*/
void cleanup(void)
{
/*
* print timing stats if that option was specified.
* print errno log if that option was specified.
*/
TEST_CLEANUP;
close(fd[0]);
if (unlink(f_name) < 0) {
tst_resm(TFAIL, "unlink Failed--file = %s, errno = %d",
f_name, errno);
}
tst_rmdir();
}
/*
* sighandler()
* Signal handler for SIGTERM and SIGPIPE
*/
void sighandler(int sig)
{
switch (sig) {
case SIGTERM:
break;
case SIGPIPE:
++in_sighandler;
return;
default:
tst_resm(TFAIL, "sighandler() received invalid signal "
": %d", sig);
break;
}
if ((unlink(f_name) < 0) && (errno != ENOENT)) {
tst_resm(TFAIL, "unlink Failed--file = %s, errno = %d",
f_name, errno);
cleanup();
}
exit(sig);
}