zram: generic RAM based compressed R/W block devices
http://lkml.org/lkml/2010/8/9/227
Signed-off-by: CAI Qian <[email protected]>
---
v2: code cleanup
testcases/kernel/mem/zram/Makefile | 22 +++++
testcases/kernel/mem/zram/zram01.c | 158 ++++++++++++++++++++++++++++++++++++
2 files changed, 180 insertions(+), 0 deletions(-)
create mode 100644 testcases/kernel/mem/zram/Makefile
create mode 100644 testcases/kernel/mem/zram/zram01.c
diff --git a/testcases/kernel/mem/zram/Makefile
b/testcases/kernel/mem/zram/Makefile
new file mode 100644
index 0000000..3634570
--- /dev/null
+++ b/testcases/kernel/mem/zram/Makefile
@@ -0,0 +1,22 @@
+#
+# Copyright (C) 2010 Red Hat, Inc.
+#
+# 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+#
+
+top_srcdir ?= ../../../..
+
+include $(top_srcdir)/include/mk/testcases.mk
+include $(top_srcdir)/include/mk/generic_leaf_target.mk
diff --git a/testcases/kernel/mem/zram/zram01.c
b/testcases/kernel/mem/zram/zram01.c
new file mode 100644
index 0000000..e63cec4
--- /dev/null
+++ b/testcases/kernel/mem/zram/zram01.c
@@ -0,0 +1,158 @@
+/*
+ * zram: generic RAM based compressed R/W block devices
+ * http://lkml.org/lkml/2010/8/9/227
+ *
+ * Copyright (C) 2010 Red Hat, Inc.
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <errno.h>
+#include <unistd.h>
+#include <string.h>
+#include "test.h"
+#include "usctest.h"
+
+char *TCID = "zram01";
+int TST_TOTAL = 1;
+extern int Tst_count;
+int modprobe = 0;
+
+#define PATH_ZRAM "/sys/block/zram0"
+#define SIZE (512 * 1024 * 1024)
+#define DEVICE "/dev/zram0"
+
+static void setup(void);
+static void cleanup(void) LTP_ATTRIBUTE_NORETURN;
+static void print(char *string);
+static void dump_info(void);
+
+int main(int argc, char *argv[])
+{
+ int lc, fd;
+ char *msg;
+ char size[BUFSIZ];
+ void *s;
+
+ msg = parse_opts(argc, argv, NULL, NULL);
+ if (msg != NULL)
+ tst_brkm(TBROK, tst_exit, "OPTION PARSING ERROR - %s", msg);
+
+ setup();
+
+ for (lc = 0; TEST_LOOPING(lc); lc++) {
+ Tst_count = 0;
+ tst_resm(TINFO, "create a zram device with %d bytes in size.",
+ SIZE);
+ fd = open(PATH_ZRAM "/disksize", O_WRONLY);
+ if (fd == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "open %s",
+ PATH_ZRAM "/disksize");
+ sprintf(size, "%d", SIZE);
+ if (write(fd, size, strlen(size)) != strlen(size))
+ tst_brkm(TBROK|TERRNO, cleanup, "write %s to %s", size,
+ PATH_ZRAM "/disksize");
+ close(fd);
+
+ tst_resm(TINFO, "map it into memory.");
+ fd = open(DEVICE, O_RDWR);
+ if (fd == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "open %s", DEVICE);
+ s = mmap(NULL, SIZE, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0);
+ if (s == MAP_FAILED)
+ tst_brkm(TBROK|TERRNO, cleanup, "mmap");
+
+ tst_resm(TINFO, "write all the memory.");
+ memset(s, SIZE, 'a');
+ close(fd);
+
+ dump_info();
+
+ tst_resm(TINFO, "reset it.");
+ fd = open(PATH_ZRAM "/reset", O_WRONLY);
+ if (fd == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "open %s",
+ PATH_ZRAM "/reset");
+ if (write(fd, "1", 1) != 1)
+ tst_brkm(TBROK|TERRNO, cleanup, "write 1 to %s",
+ PATH_ZRAM "/reset");
+ close(fd);
+
+ dump_info();
+ }
+ cleanup();
+}
+
+void setup(void)
+{
+ if (access(PATH_ZRAM, R_OK|W_OK|X_OK) == -1 && errno == ENOENT) {
+ system("modprobe zram");
+ modprobe = 1;
+ if (access(PATH_ZRAM, R_OK|W_OK|X_OK) == -1 && errno == ENOENT)
+ tst_brkm(TCONF, tst_exit, "system has no zram device.");
+ else
+ tst_brkm(TBROK|TERRNO, tst_exit, "access");
+ }
+ tst_sig(FORK, DEF_HANDLER, cleanup);
+ TEST_PAUSE;
+}
+
+void cleanup(void)
+{
+ if (modprobe == 1)
+ system("rmmod zram");
+
+ TEST_CLEANUP;
+ tst_exit();
+}
+
+void print(char *string)
+{
+ FILE *fp;
+ char buf[BUFSIZ], value[BUFSIZ];
+
+ sprintf(buf, "%s/%s", PATH_ZRAM, string);
+ fp = fopen(buf, "r");
+ if (fp == NULL)
+ tst_brkm(TBROK|TERRNO, cleanup, "fopen %s", buf);
+
+ if (fgets(value, BUFSIZ, fp) == NULL)
+ tst_brkm(TBROK|TERRNO, cleanup, "fgets %s", buf);
+ value[strlen(value) - 1] = '\0';
+ fclose(fp);
+
+ tst_resm(TINFO, "%s is %s", buf, value);
+}
+
+void dump_info(void)
+{
+ print("initstate");
+ print("compr_data_size");
+ print("orig_data_size");
+ print("disksize");
+ print("mem_used_total");
+ print("num_reads");
+ print("num_writes");
+ print("zero_pages");
+}
--
1.7.3.2From 0fe77157c7b0b412ac6a89e401417ddf86d18519 Mon Sep 17 00:00:00 2001
From: CAI Qian <[email protected]>
Date: Fri, 31 Dec 2010 09:18:32 +0800
Subject: [PATCH v2] zram01: add a new test for zram feature
zram: generic RAM based compressed R/W block devices
http://lkml.org/lkml/2010/8/9/227
Signed-off-by: CAI Qian <[email protected]>
---
v2: code cleanup
testcases/kernel/mem/zram/Makefile | 22 +++++
testcases/kernel/mem/zram/zram01.c | 158 ++++++++++++++++++++++++++++++++++++
2 files changed, 180 insertions(+), 0 deletions(-)
create mode 100644 testcases/kernel/mem/zram/Makefile
create mode 100644 testcases/kernel/mem/zram/zram01.c
diff --git a/testcases/kernel/mem/zram/Makefile b/testcases/kernel/mem/zram/Makefile
new file mode 100644
index 0000000..3634570
--- /dev/null
+++ b/testcases/kernel/mem/zram/Makefile
@@ -0,0 +1,22 @@
+#
+# Copyright (C) 2010 Red Hat, Inc.
+#
+# 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+#
+
+top_srcdir ?= ../../../..
+
+include $(top_srcdir)/include/mk/testcases.mk
+include $(top_srcdir)/include/mk/generic_leaf_target.mk
diff --git a/testcases/kernel/mem/zram/zram01.c b/testcases/kernel/mem/zram/zram01.c
new file mode 100644
index 0000000..e63cec4
--- /dev/null
+++ b/testcases/kernel/mem/zram/zram01.c
@@ -0,0 +1,158 @@
+/*
+ * zram: generic RAM based compressed R/W block devices
+ * http://lkml.org/lkml/2010/8/9/227
+ *
+ * Copyright (C) 2010 Red Hat, Inc.
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <errno.h>
+#include <unistd.h>
+#include <string.h>
+#include "test.h"
+#include "usctest.h"
+
+char *TCID = "zram01";
+int TST_TOTAL = 1;
+extern int Tst_count;
+int modprobe = 0;
+
+#define PATH_ZRAM "/sys/block/zram0"
+#define SIZE (512 * 1024 * 1024)
+#define DEVICE "/dev/zram0"
+
+static void setup(void);
+static void cleanup(void) LTP_ATTRIBUTE_NORETURN;
+static void print(char *string);
+static void dump_info(void);
+
+int main(int argc, char *argv[])
+{
+ int lc, fd;
+ char *msg;
+ char size[BUFSIZ];
+ void *s;
+
+ msg = parse_opts(argc, argv, NULL, NULL);
+ if (msg != NULL)
+ tst_brkm(TBROK, tst_exit, "OPTION PARSING ERROR - %s", msg);
+
+ setup();
+
+ for (lc = 0; TEST_LOOPING(lc); lc++) {
+ Tst_count = 0;
+ tst_resm(TINFO, "create a zram device with %d bytes in size.",
+ SIZE);
+ fd = open(PATH_ZRAM "/disksize", O_WRONLY);
+ if (fd == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "open %s",
+ PATH_ZRAM "/disksize");
+ sprintf(size, "%d", SIZE);
+ if (write(fd, size, strlen(size)) != strlen(size))
+ tst_brkm(TBROK|TERRNO, cleanup, "write %s to %s", size,
+ PATH_ZRAM "/disksize");
+ close(fd);
+
+ tst_resm(TINFO, "map it into memory.");
+ fd = open(DEVICE, O_RDWR);
+ if (fd == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "open %s", DEVICE);
+ s = mmap(NULL, SIZE, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0);
+ if (s == MAP_FAILED)
+ tst_brkm(TBROK|TERRNO, cleanup, "mmap");
+
+ tst_resm(TINFO, "write all the memory.");
+ memset(s, SIZE, 'a');
+ close(fd);
+
+ dump_info();
+
+ tst_resm(TINFO, "reset it.");
+ fd = open(PATH_ZRAM "/reset", O_WRONLY);
+ if (fd == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "open %s",
+ PATH_ZRAM "/reset");
+ if (write(fd, "1", 1) != 1)
+ tst_brkm(TBROK|TERRNO, cleanup, "write 1 to %s",
+ PATH_ZRAM "/reset");
+ close(fd);
+
+ dump_info();
+ }
+ cleanup();
+}
+
+void setup(void)
+{
+ if (access(PATH_ZRAM, R_OK|W_OK|X_OK) == -1 && errno == ENOENT) {
+ system("modprobe zram");
+ modprobe = 1;
+ if (access(PATH_ZRAM, R_OK|W_OK|X_OK) == -1 && errno == ENOENT)
+ tst_brkm(TCONF, tst_exit, "system has no zram device.");
+ else
+ tst_brkm(TBROK|TERRNO, tst_exit, "access");
+ }
+ tst_sig(FORK, DEF_HANDLER, cleanup);
+ TEST_PAUSE;
+}
+
+void cleanup(void)
+{
+ if (modprobe == 1)
+ system("rmmod zram");
+
+ TEST_CLEANUP;
+ tst_exit();
+}
+
+void print(char *string)
+{
+ FILE *fp;
+ char buf[BUFSIZ], value[BUFSIZ];
+
+ sprintf(buf, "%s/%s", PATH_ZRAM, string);
+ fp = fopen(buf, "r");
+ if (fp == NULL)
+ tst_brkm(TBROK|TERRNO, cleanup, "fopen %s", buf);
+
+ if (fgets(value, BUFSIZ, fp) == NULL)
+ tst_brkm(TBROK|TERRNO, cleanup, "fgets %s", buf);
+ value[strlen(value) - 1] = '\0';
+ fclose(fp);
+
+ tst_resm(TINFO, "%s is %s", buf, value);
+}
+
+void dump_info(void)
+{
+ print("initstate");
+ print("compr_data_size");
+ print("orig_data_size");
+ print("disksize");
+ print("mem_used_total");
+ print("num_reads");
+ print("num_writes");
+ print("zero_pages");
+}
--
1.7.3.2
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