Hi all,
Based on the discussion at lkml, we ported the old remap_file_pages test case
created by Ingo Molnar to LTP.
Subrata, I guess that you can apply this version at LTP, I already tested it
at x86, x86_64 and ppc and it worked fine on all systems.
--
Ricardo Salveti de Araujo
Author: Ricardo Salveti de Araujo <[EMAIL PROTECTED]>
Date: Mon Oct 15 02:37:29 2007 -0200
Adding remap_file_pages test case.
This test case is based on the test case created by Ingo Molnar
Signed-off-by: Ricardo Salveti de Araujo <[EMAIL PROTECTED]>
diff --git a/runtest/syscalls b/runtest/syscalls
index dfeb232..a9f4d82 100644
--- a/runtest/syscalls
+++ b/runtest/syscalls
@@ -595,6 +595,8 @@ recvfrom01 recvfrom01
recvmsg01 recvmsg01
+remap_file_pages01 remap_file_pages01
+
rename01 rename01
rename01A symlink01 -T rename01
rename02 rename02
diff --git a/testcases/kernel/syscalls/remap_file_pages/Makefile b/testcases/kernel/syscalls/remap_file_pages/Makefile
new file mode 100644
index 0000000..6706403
--- /dev/null
+++ b/testcases/kernel/syscalls/remap_file_pages/Makefile
@@ -0,0 +1,31 @@
+#
+# Copyright (c) International Business Machines Corp., 2001
+#
+# 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 St, Fifth Floor, Boston, MA 02110-1301 USA
+#
+
+CFLAGS += -I../../../../include -Wall
+LDLIBS += -L../../../../lib -lltp
+
+SRCS = $(wildcard *.c)
+TARGETS = $(patsubst %.c,%,$(SRCS))
+
+all: $(TARGETS)
+
+install:
+ @set -e; for i in $(TARGETS); do ln -f $$i ../../../bin/$$i ; done
+
+clean:
+ rm -f $(TARGETS)
diff --git a/testcases/kernel/syscalls/remap_file_pages/remap_file_pages01.c b/testcases/kernel/syscalls/remap_file_pages/remap_file_pages01.c
new file mode 100644
index 0000000..a0d6a99
--- /dev/null
+++ b/testcases/kernel/syscalls/remap_file_pages/remap_file_pages01.c
@@ -0,0 +1,276 @@
+/*
+ * Copyright (C) Ingo Molnar, 2002
+ * Copyright (C) Ricardo Salveti de Araujo, 2007
+ * Copyright (C) International Business Machines Corp., 2007
+ *
+ * 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.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like. Any license provided herein, whether implied or
+ * otherwise, applies only to this software file. Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ */
+
+/*
+ * NAME
+ * remap_file_pages01
+ *
+ * DESCRIPTION
+ * The remap_file_pages() system call is used to create a non-linear
+ * mapping, that is, a mapping in which the pages of the file are mapped
+ * into a non-sequential order in memory. The advantage of using
+ * remap_file_pages() over using repeated calls to mmap(2) is that
+ * the former approach does not require the kernel to create
+ * additional VMA (Virtual Memory Area) data structures.
+ *
+ * Runs remap_file_pages agains a mmaped area and check the results
+ *
+ * Setup:
+ * Create a temp directory, open a file and get the file descriptor
+ *
+ * Test:
+ * Test with a normal file and with /dev/shm/cache
+ * 1. Set up the cache
+ * 2. Write the cache to the file
+ * 3. Runs mmap at the same file
+ * 4. Runs remap_file_pages at the mapped memory
+ * 5. Check the results
+ *
+ * Cleanup:
+ * Remove the file and erase the tmp directory
+ *
+ * Usage: <for command-line>
+ * remap_file_pages01 [-c n] [-f] [-i n] [-I x] [-P x] [-t]
+ * where, -c n : Run n copies concurrently.
+ * -f : Turn off functionality Testing.
+ * -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
+ * - Ingo Molnar, <[EMAIL PROTECTED]> wrote this test case
+ * - Nick Piggin, <[EMAIL PROTECTED]> did the following cleanup
+ *
+ * 11/10/2007 - Port to LTP format by Subrata Modak, <[EMAIL PROTECTED]>
+ * and Ricardo Salveti de Araujo, <[EMAIL PROTECTED]>
+ */
+
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <sys/times.h>
+#include <sys/wait.h>
+#include <sys/ioctl.h>
+#include <sys/syscall.h>
+#include <linux/unistd.h>
+
+#include "test.h" /*LTP Specific Include File*/
+#include "usctest.h" /*LTP Specific Include File*/
+
+/* Test case defines */
+#define WINDOW_START 0x48000000
+
+size_t page_sz;
+size_t page_words;
+size_t cache_pages;
+size_t cache_sz;
+size_t window_pages;
+size_t window_sz;
+
+static void setup();
+static void cleanup();
+static void test_nonlinear(int fd);
+
+char *TCID = "remap_file_pages01"; /* Test program identifier. */
+int TST_TOTAL = 2; /* Total number of test cases. */
+extern int Tst_count; /* Test Case counter for tst_* routines */
+
+static char *cache_contents;
+int fd1, fd2; /* File descriptors used at the test */
+
+int
+main(int ac, char **av)
+{
+ int lc; /* loop counter */
+ char *msg; /* message returned from parse_opts */
+
+ /* parse standard options */
+ if ((msg = parse_opts(ac, av, (option_t *)NULL, NULL)) != (char *)NULL) {
+ tst_brkm(TBROK, tst_exit, "OPTION PARSING ERROR - %s", msg);
+ }
+
+ /* perform global setup for test */
+ setup();
+
+ /* check looping state if -i option given */
+ for (lc = 0; TEST_LOOPING(lc); lc++) {
+
+ /* reset Tst_count in case we are looping. */
+ Tst_count = 0;
+
+ test_nonlinear(fd1);
+ tst_resm(TPASS, "Non-Linear shm file OK");
+
+ test_nonlinear(fd2);
+ tst_resm(TPASS, "Non-Linear /tmp/ file OK");
+ }
+
+ /* clean up and exit */
+ cleanup();
+
+ /*NOTREACHED*/
+ return 0;
+}
+
+/* test case function, that runs remap_file_pages */
+static void test_nonlinear(int fd)
+{
+ char *data = NULL;
+ int i, j, repeat = 2;
+
+ for (i = 0; i < cache_pages; i++) {
+ char *page = cache_contents + i*page_sz;
+
+ for (j = 0; j < page_words; j++)
+ page[j] = i;
+ }
+
+ if (write(fd, cache_contents, cache_sz) != cache_sz) {
+ tst_resm(TFAIL, "Write Error for \"cache_contents\" to \"cache_sz\" of %d (errno=%d : %s)",
+ cache_sz, errno, strerror(errno));
+ cleanup();
+ }
+
+ data = mmap((void *)WINDOW_START,
+ window_sz,
+ PROT_READ|PROT_WRITE,
+ MAP_FIXED | MAP_SHARED,
+ fd, 0);
+
+ if (data == MAP_FAILED) {
+ tst_resm(TFAIL, "mmap Error, errno=%d : %s", errno, strerror(errno));
+ cleanup();
+ }
+
+again:
+ for (i = 0; i < window_pages; i += 2) {
+ char *page = data + i*page_sz;
+
+ if (remap_file_pages(page, page_sz * 2, 0,
+ (window_pages-i-2), 0) == -1) {
+ tst_resm(TFAIL, "remap_file_pages error for page=%d, page_sz=%d, window_pages=%d (errno=%d : %s)",
+ page,(page_sz * 2), (window_pages-i-2), errno, strerror(errno));
+ cleanup();
+ }
+ }
+
+ for (i = 0; i < window_pages; i++) {
+ /*
+ * Double-check the correctness of the mapping:
+ */
+ if (i & 1) {
+ if (data[i*page_sz] != window_pages-i) {
+ tst_resm(TFAIL, "hm, mapped incorrect data, data[%d]=%d, (window_pages-%d)=%d",
+ (i*page_sz), data[i*page_sz], i, (window_pages-i));
+ cleanup();
+ }
+ } else {
+ if (data[i*page_sz] != window_pages-i-2) {
+ tst_resm(TFAIL,"hm, mapped incorrect data, data[%d]=%d, (window_pages-%d-2)=%d",
+ (i*page_sz), data[i*page_sz], i, (window_pages-i-2));
+ cleanup();
+ }
+ }
+ }
+
+ if (--repeat)
+ goto again;
+}
+
+/* setup() - performs all ONE TIME setup for this test */
+void
+setup()
+{
+ /* capture signals */
+ tst_sig(FORK, DEF_HANDLER, cleanup);
+
+ /* make a temp directory and cd to it */
+ tst_tmpdir();
+
+ /* Pause if that option was specified */
+ TEST_PAUSE;
+
+ /* Get page size */
+ if ((page_sz = getpagesize()) < 0) {
+ tst_brkm(TFAIL, cleanup,
+ "getpagesize() fails to get system page size");
+ }
+
+ page_words = (page_sz/sizeof(char));
+
+ /* Set the cache size */
+ cache_pages = 1024;
+ cache_sz = cache_pages*page_sz;
+ cache_contents = (char *) malloc(cache_sz * sizeof(char));
+
+ /* Set the window size */
+ window_pages = 16;
+ window_sz = window_pages*page_sz;
+
+ if ((fd1 = open("/dev/shm/cache", O_RDWR|O_CREAT|O_TRUNC,S_IRWXU)) < 0) {
+ tst_brkm(TBROK, cleanup,
+ "open(%s, O_RDWR|O_CREAT|O_TRUNC,S_IRWXU) Failed, errno=%d : %s",
+ "/dev/shm/cache", errno, strerror(errno));
+ }
+
+ if ((fd2 = open("cache", O_RDWR|O_CREAT|O_TRUNC,S_IRWXU)) < 0) {
+ tst_brkm(TBROK, cleanup,
+ "open(%s, O_RDWR|O_CREAT|O_TRUNC,S_IRWXU) Failed, errno=%d : %s",
+ "cache", errno, strerror(errno));
+ }
+
+} /* End setup() */
+
+/*
+* cleanup() - Performs one time cleanup for this test at
+* completion or premature exit
+*/
+void
+cleanup()
+{
+ /* Close the file descriptors */
+ close(fd1);
+ close(fd2);
+
+ /*
+ * print timing stats if that option was specified.
+ * print errno log if that option was specified.
+ */
+ TEST_CLEANUP;
+
+ /* Remove tmp dir and all files inside it*/
+ tst_rmdir();
+
+ /* exit with return code appropriate for results */
+ tst_exit();
+
+} /* End cleanup() */
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