pwritev/pwritev01.c: add new testcase

Test pwritev(2) with some basic functions.
Pwritev(2) should succeed to write the expected content of data and
the file offset is not changed after writing the file.

Signed-off-by: Xiao Yang <yangx.jy@cn.fujitsu.com>
Signed-off-by: Cyril Hrubis <chrubis@suse.cz>

configure.ac

@@ -182,5 +182,6 @@ LTP_CHECK_IF_LINK
 LTP_CHECK_KCMP
 LTP_CHECK_KCMP_TYPE
 LTP_CHECK_PREADV
+LTP_CHECK_PWRITEV
 
 AC_OUTPUT

m4/ltp-pwritev.m4

@@ -0,0 +1,23 @@
+dnl
+dnl Copyright (c) 2015 Fujitsu Ltd.
+dnl Author: Xiao Yang <yangx.jy@cn.fujitsu.com>
+dnl
+dnl This program is free software; you can redistribute it and/or modify it
+dnl under the terms of version 2 of the GNU General Public License as
+dnl published by the Free Software Foundation.
+dnl
+dnl This program is distributed in the hope that it would be useful, but
+dnl WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+dnl
+dnl You should have received a copy of the GNU General Public License
+dnl alone with this program.
+dnl
+
+dnl
+dnl LTP_CHECK_PWRITEV
+dnl ----------------------------
+dnl
+AC_DEFUN([LTP_CHECK_PWRITEV],[
+AC_CHECK_FUNCS(pwritev,,)
+])

runtest/ltplite

@@ -608,6 +608,8 @@ pwrite01_64 pwrite01_64
 pwrite02_64 pwrite02_64
 pwrite04_64 pwrite04_64
 
+pwritev01 pwritev01
+
 read01 read01
 read02 read02
 read03 read03

runtest/stress.part3

@@ -517,6 +517,8 @@ pwrite01_64 pwrite01_64
 pwrite02_64 pwrite02_64
 pwrite04_64 pwrite04_64
 
+pwritev01 pwritev01
+
 read01 read01
 read02 read02
 read03 read03

runtest/syscalls

@@ -813,6 +813,9 @@ pwrite01_64 pwrite01_64
 pwrite02_64 pwrite02_64
 pwrite04_64 pwrite04_64
 
+pwritev01 pwritev01
+pwritev01_64 pwritev01_64
+
 quotactl01 quotactl01
 quotactl02 quotactl02
 

testcases/kernel/syscalls/.gitignore

@@ -678,6 +678,8 @@
 /pwrite/pwrite02_64
 /pwrite/pwrite04
 /pwrite/pwrite04_64
+/pwritev/pwritev01
+/pwritev/pwritev01_64
 /quotactl/quotactl01
 /quotactl/quotactl02
 /read/read01

testcases/kernel/syscalls/pwritev/Makefile

@@ -0,0 +1,28 @@
+#
+#  Copyright (c) 2015 Fujitsu Ltd.
+#  Author: Xiao Yang <yangx.jy@cn.fujitsu.com>
+#
+#  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.
+#
+#
+
+top_srcdir		?= ../../../..
+
+include $(top_srcdir)/include/mk/testcases.mk
+
+include $(abs_srcdir)/../utils/newer_64.mk
+
+%_64: CPPFLAGS += -D_FILE_OFFSET_BITS=64
+
+include $(top_srcdir)/include/mk/generic_leaf_target.mk

testcases/kernel/syscalls/pwritev/pwritev.h

@@ -0,0 +1,31 @@
+/*
+* Copyright (c) 2015 Fujitsu Ltd.
+* Author: Xiao Yang <yangx.jy@cn.fujitsu.com>
+*
+* This program is free software; you can redistribute it and/or modify it
+* under the terms of version 2 of the GNU General Public License as
+* published by the Free Software Foundation.
+*
+* This program is distributed in the hope that it would be useful, but
+* WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+*
+* You should have received a copy of the GNU General Public License
+* alone with this program.
+*/
+
+#ifndef PWRITEV_H
+#define PWRITEV_H
+
+#include <sys/types.h>
+#include "config.h"
+#include "linux_syscall_numbers.h"
+
+#if !defined(HAVE_PWRITEV)
+int pwritev(int fd, const struct iovec *iov, int iovcnt, off_t offset)
+{
+	return ltp_syscall(__NR_pwritev, fd, iov, iovcnt, offset);
+}
+#endif
+
+#endif /* PWRITEV_H */

testcases/kernel/syscalls/pwritev/pwritev01.c

@@ -0,0 +1,146 @@
+/*
+* Copyright (c) 2015 Fujitsu Ltd.
+* Author: Xiao Yang <yangx.jy@cn.fujitsu.com>
+*
+* This program is free software; you can redistribute it and/or modify it
+* under the terms of version 2 of the GNU General Public License as
+* published by the Free Software Foundation.
+*
+* This program is distributed in the hope that it would be useful, but
+* WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+*
+* You should have received a copy of the GNU General Public License
+* alone with this program.
+*/
+
+/*
+* Test Name: pwritev01
+*
+* Test Description:
+* Testcase to check the basic functionality of the pwritev(2).
+* pwritev(2) should succeed to write the expected content of data
+* and after writing the file, the file offset is not changed.
+*/
+
+#include <errno.h>
+
+#include "test.h"
+#include "pwritev.h"
+#include "safe_macros.h"
+
+#define	CHUNK		64
+
+static char buf[CHUNK];
+static char initbuf[CHUNK * 2];
+static char preadbuf[CHUNK];
+static int fd;
+
+static struct iovec wr_iovec[] = {
+	{buf, CHUNK},
+	{NULL, 0},
+};
+
+static struct test_case_t {
+	int count;
+	off_t offset;
+	ssize_t size;
+} tc[] = {
+	{1, 0, CHUNK},
+	{2, 0, CHUNK},
+	{1, CHUNK/2, CHUNK},
+};
+
+void verify_pwritev(struct test_case_t *);
+void setup(void);
+void cleanup(void);
+
+char *TCID = "pwritev01";
+int TST_TOTAL =  ARRAY_SIZE(tc);
+
+int main(int ac, char **av)
+{
+	int lc;
+	int i;
+
+	tst_parse_opts(ac, av, NULL, NULL);
+
+	setup();
+
+	for (lc = 0; TEST_LOOPING(lc); lc++) {
+		tst_count = 0;
+
+		for (i = 0; i < TST_TOTAL; i++)
+			verify_pwritev(&tc[i]);
+	}
+	cleanup();
+	tst_exit();
+}
+
+void verify_pwritev(struct test_case_t *tc)
+{
+	int i;
+
+	SAFE_PWRITE(cleanup, 1, fd, initbuf, sizeof(initbuf), 0);
+
+	SAFE_LSEEK(cleanup, fd, 0, SEEK_SET);
+
+	TEST(pwritev(fd, wr_iovec, tc->count, tc->offset));
+	if (TEST_RETURN < 0) {
+		tst_resm(TFAIL | TTERRNO, "Pwritev(2) failed");
+		return;
+	}
+
+	if (TEST_RETURN != tc->size) {
+		tst_resm(TFAIL, "Pwritev(2) write %li bytes, expected %li",
+			 TEST_RETURN, tc->size);
+		return;
+	}
+
+	if (SAFE_LSEEK(cleanup, fd, 0, SEEK_CUR) != 0) {
+		tst_resm(TFAIL, "Pwritev(2) has changed file offset");
+		return;
+	}
+
+	SAFE_PREAD(cleanup, 1, fd, preadbuf, tc->size, tc->offset);
+
+	for (i = 0; i < tc->size; i++) {
+		if (preadbuf[i] != 0x61)
+			break;
+	}
+
+	if (i != tc->size) {
+		tst_resm(TFAIL, "Buffer wrong at %i have %02x expected 61",
+			 i, preadbuf[i]);
+		return;
+	}
+
+	tst_resm(TPASS, "Pwritev(2) write %li bytes successfully "
+		 "with content 'a' expectedly ", tc->size);
+}
+
+void setup(void)
+{
+	if ((tst_kvercmp(2, 6, 30)) < 0) {
+		tst_brkm(TCONF, NULL, "This test can only run on kernels "
+			"that are 2.6.30 and higher");
+	}
+
+	tst_sig(NOFORK, DEF_HANDLER, cleanup);
+
+	TEST_PAUSE;
+
+	tst_tmpdir();
+
+	memset(&buf, 0x61, CHUNK);
+
+	fd = SAFE_OPEN(cleanup, "file", O_RDWR | O_CREAT, 0644);
+}
+
+void cleanup(void)
+{
+	if (fd > 0 && close(fd))
+		tst_resm(TWARN | TERRNO, "Failed to close file");
+
+	tst_rmdir();
+}