zdtm: A bunch of test for various flavors of unlinked/opened/maped files

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

test/zdtm.sh

@@ -61,6 +61,9 @@ static/selfexe00
 static/unlink_fstat00
 static/unlink_fstat02
 static/unlink_fstat03
+static/unlink_mmap00
+static/unlink_mmap01
+static/unlink_mmap02
 static/eventfs00
 static/signalfd00
 static/inotify00

test/zdtm/live/static/Makefile

@@ -128,6 +128,9 @@ TST_FILE	=				\
 		fifo_wronly			\
 		unlink_fifo			\
 		unlink_fifo_wronly		\
+		unlink_mmap00			\
+		unlink_mmap01			\
+		unlink_mmap02			\
 		file_shared			\
 		file_append			\
 		cow01				\

test/zdtm/live/static/unlink_mmap00.c

+#include <errno.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <string.h>
+#include <sys/mman.h>
+
+#include "zdtmtst.h"
+
+const char *test_doc	= "Test mmaped and unlinked files";
+
+char *filename;
+TEST_OPTION(filename, string, "file name", 1);
+
+#ifndef PAGE_SIZE
+#define PAGE_SIZE	4096
+#endif
+
+static void touch_file_page(int fd, unsigned long off, char c)
+{
+	if (lseek(fd, off, SEEK_SET) != off) {
+		err("Lseek fail");
+		exit(1);
+	}
+
+	if (write(fd, &c, 1) != 1) {
+		err("Write fail");
+		exit(1);
+	}
+}
+
+int main(int argc, char ** argv)
+{
+	int fd;
+	char *mem_a, *mem_b;
+
+	test_init(argc, argv);
+
+	fd = open(filename, O_RDWR | O_CREAT | O_TRUNC, 0644);
+	if (fd < 0) {
+		err("can't open file");
+		exit(1);
+	}
+
+
+	touch_file_page(fd, 0, 'a');
+	touch_file_page(fd, PAGE_SIZE, 'b');
+	touch_file_page(fd, 2 * PAGE_SIZE - 1, 'c'); /* for aligned file */
+
+	/* map with different prots to create 2 regions */
+	mem_a = mmap(NULL, PAGE_SIZE, PROT_READ, MAP_PRIVATE | MAP_FILE, fd, 0);
+	mem_b = mmap(NULL, PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_FILE, fd, PAGE_SIZE);
+	if (mem_a == MAP_FAILED || mem_b == MAP_FAILED) {
+		err("can't map file");
+		exit(1);
+	}
+
+	if (unlink(filename) < 0) {
+		err("can't unlink file");
+		exit(1);
+	}
+
+	close(fd);
+
+	test_daemon();
+	test_waitsig();
+
+	if (mem_a[0] != 'a')
+		fail("1st region fail");
+	else if (mem_b[0] != 'b' || mem_b[PAGE_SIZE - 1] != 'c')
+		fail("2nd regin fail");
+	else
+		pass();
+
+	return 0;
+}

test/zdtm/live/static/unlink_mmap01.c

+#include <errno.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <string.h>
+#include <stdio.h>
+
+#include "zdtmtst.h"
+
+const char *test_doc	= "Test mmaped and unlinked files (2, with hard links)";
+
+char *filename;
+TEST_OPTION(filename, string, "file name", 1);
+static char linkname[4096];
+
+#ifndef PAGE_SIZE
+#define PAGE_SIZE	4096
+#endif
+
+static void touch_file_page(int fd, unsigned long off, char c)
+{
+	if (lseek(fd, off, SEEK_SET) != off) {
+		err("Lseek fail");
+		exit(1);
+	}
+
+	if (write(fd, &c, 1) != 1) {
+		err("Write fail");
+		exit(1);
+	}
+}
+
+int main(int argc, char ** argv)
+{
+	int fd;
+	char *mem_a, *mem_b;
+
+	test_init(argc, argv);
+
+	fd = open(filename, O_RDWR | O_CREAT | O_TRUNC, 0644);
+	if (fd < 0) {
+		err("can't open file");
+		exit(1);
+	}
+
+	touch_file_page(fd, 0, 'a');
+	touch_file_page(fd, PAGE_SIZE - 1, 'b');/* for aligned file */
+
+	mem_a = mmap(NULL, PAGE_SIZE, PROT_READ, MAP_PRIVATE | MAP_FILE, fd, 0);
+	if (mem_a == MAP_FAILED) {
+		err("can't map file");
+		exit(1);
+	}
+
+	sprintf(linkname, "%s.lnk", filename);
+	if (link(filename, linkname)) {
+		err("can't link file");
+		exit(1);
+	}
+
+	if (unlink(filename) < 0) {
+		err("can't unlink file");
+		exit(1);
+	}
+
+	close(fd);
+
+	fd = open(linkname, O_RDWR);
+	if (fd < 0) {
+		err("can't open link");
+		exit(1);
+	}
+
+	mem_b = mmap(NULL, PAGE_SIZE, PROT_READ, MAP_PRIVATE | MAP_FILE, fd, 0);
+	if (mem_b == MAP_FAILED) {
+		err("can't map link");
+		exit(1);
+	}
+
+	if (unlink(linkname) < 0) {
+		err("can't unlink link");
+		exit(1);
+	}
+
+	close(fd);
+
+	test_daemon();
+	test_waitsig();
+
+	if (mem_a[0] != 'a' || mem_a[PAGE_SIZE - 1] != 'b')
+		fail("1st region fail");
+	else if (mem_b[0] != 'a' || mem_b[PAGE_SIZE - 1] != 'b')
+		fail("2nd regin fail");
+	else
+		pass();
+
+	return 0;
+}

test/zdtm/live/static/unlink_mmap02.c

+#include <errno.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <string.h>
+#include <sys/mman.h>
+
+#include "zdtmtst.h"
+
+const char *test_doc	= "Test mmaped, opened and unlinked files";
+
+char *filename;
+TEST_OPTION(filename, string, "file name", 1);
+
+#ifndef PAGE_SIZE
+#define PAGE_SIZE	4096
+#endif
+
+static void touch_file_page(int fd, unsigned long off, char c)
+{
+	if (lseek(fd, off, SEEK_SET) != off) {
+		err("Lseek fail");
+		exit(1);
+	}
+
+	if (write(fd, &c, 1) != 1) {
+		err("Write fail");
+		exit(1);
+	}
+}
+
+int main(int argc, char ** argv)
+{
+	int fd;
+	char *mem_a, *mem_b;
+
+	test_init(argc, argv);
+
+	fd = open(filename, O_RDWR | O_CREAT | O_TRUNC, 0644);
+	if (fd < 0) {
+		err("can't open file");
+		exit(1);
+	}
+
+
+	touch_file_page(fd, 2 * PAGE_SIZE - 1, 'c'); /* for aligned file */
+
+	/* map with different prots to create 2 regions */
+	mem_a = mmap(NULL, PAGE_SIZE, PROT_READ, MAP_PRIVATE | MAP_FILE, fd, 0);
+	mem_b = mmap(NULL, PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_FILE, fd, PAGE_SIZE);
+	if (mem_a == MAP_FAILED || mem_b == MAP_FAILED) {
+		err("can't map file");
+		exit(1);
+	}
+
+	if (unlink(filename) < 0) {
+		err("can't unlink file");
+		exit(1);
+	}
+
+	test_daemon();
+	test_waitsig();
+
+	touch_file_page(fd, 0, 'a');
+	touch_file_page(fd, PAGE_SIZE, 'b');
+
+	if (mem_a[0] != 'a')
+		fail("1st region fail");
+	else if (mem_b[0] != 'b' || mem_b[PAGE_SIZE - 1] != 'c')
+		fail("2nd regin fail");
+	else
+		pass();
+
+	return 0;
+}