zdtm: Tests for ghost files with holes

Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>

test/zdtm/static/Makefile

@@ -196,6 +196,9 @@ TST_FILE	=				\
 		unlink_fstat01+			\
 		unlink_fstat02			\
 		unlink_fstat03			\
+		ghost_holes00			\
+		ghost_holes01			\
+		ghost_holes02			\
 		unlink_largefile		\
 		mtime_mmap			\
 		fifo				\
@@ -431,6 +434,8 @@ mlock_setuid: get_smaps_bits.o
 inotify01:		CFLAGS += -DINOTIFY01
 unlink_fstat01+:	CFLAGS += -DUNLINK_OVER
 unlink_fstat04:		CFLAGS += -DUNLINK_FSTAT04
+ghost_holes01:		CFLAGS += -DTAIL_HOLE
+ghost_holes02:		CFLAGS += -DHEAD_HOLE
 sk-freebind-false:	CFLAGS += -DZDTM_FREEBIND_FALSE
 stopped01:		CFLAGS += -DZDTM_STOPPED_KILL
 stopped02:		CFLAGS += -DZDTM_STOPPED_TKILL

test/zdtm/static/ghost_holes00.c

+#include <errno.h>
+#include <stdbool.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <string.h>
+#include <linux/limits.h>
+
+#include "zdtmtst.h"
+
+const char *test_doc	= "Test ghost with one hole in the middle";
+
+char *filename;
+TEST_OPTION(filename, string, "file name", 1);
+
+/* Buffer that is suitable for hole size */
+#define BUFSIZE	4096
+static unsigned char buf4k[BUFSIZE];
+
+#ifdef HEAD_HOLE
+#define HH	1
+#else
+#define HH	0
+#endif
+
+#ifdef TAIL_HOLE
+#define TH	1
+#else
+#define TH	0
+#endif
+
+#define DATA1_BLK	(HH)
+#define DATA1_OFF	(DATA1_BLK * BUFSIZE)
+#define DATA2_BLK	(HH + 2)
+#define DATA2_OFF	(DATA2_BLK * BUFSIZE)
+#define FILE_BLOCKS	(TH + HH + 1 /* mid hole */ + 2 /* data */)
+#define FILE_SIZE	(FILE_BLOCKS * BUFSIZE)
+
+int main(int argc, char ** argv)
+{
+	int fd;
+	struct stat st;
+	uint32_t crc;
+	bool chk_hole = true;
+
+	test_init(argc, argv);
+
+	fd = open(filename, O_RDWR | O_CREAT | O_TRUNC, 0644);
+	if (fd < 0) {
+		pr_perror("can't open %s", filename);
+		exit(1);
+	}
+
+	if (unlink(filename) < 0) {
+		pr_perror("can't unlink %s", filename);
+		goto failed;
+	}
+
+	crc = ~0;
+	datagen(buf4k, BUFSIZE, &crc);
+	if (pwrite(fd, buf4k, BUFSIZE, DATA1_OFF) != BUFSIZE) {
+		pr_perror("can't write data1");
+		goto failed;
+	}
+
+	crc = ~0;
+	datagen(buf4k, BUFSIZE, &crc);
+	if (pwrite(fd, buf4k, BUFSIZE, DATA2_OFF) != BUFSIZE) {
+		pr_perror("can't write data2");
+		goto failed;
+	}
+
+	if (ftruncate(fd, FILE_SIZE)) {
+		pr_perror("Can't fixup file size");
+		goto failed;
+	}
+
+	if (lseek(fd, DATA1_OFF, SEEK_HOLE) != DATA1_OFF + BUFSIZE) {
+		test_msg("Won't check for hole\n");
+		chk_hole = false;
+	}
+
+	test_daemon();
+	test_waitsig();
+
+	if (fstat(fd, &st) < 0) {
+		fail("can't stat after");
+		goto failed;
+	}
+
+	if (st.st_size != FILE_SIZE) {
+		fail("file size changed to %ld", (long)st.st_size);
+		goto failed;
+	}
+
+	test_msg("Blocks %u OK\n", FILE_BLOCKS);
+
+	/* Data 1 */
+	if (pread(fd, buf4k, BUFSIZE, DATA1_OFF) != BUFSIZE) {
+		fail("pread1 fail");
+		goto failed;
+	}
+
+	crc = ~0;
+	if (datachk(buf4k, BUFSIZE, &crc)) {
+		fail("datachk1 fail");
+		goto failed;
+	}
+
+	test_msg("Data @%u OK\n", DATA1_BLK);
+
+	/* Data 2 */
+	if (pread(fd, buf4k, BUFSIZE, DATA2_OFF) != BUFSIZE) {
+		fail("pread2 fail");
+		goto failed;
+	}
+
+	crc = ~0;
+	if (datachk(buf4k, BUFSIZE, &crc)) {
+		fail("datachk2 fail");
+		goto failed;
+	}
+
+	test_msg("Data @%u OK\n", DATA2_BLK);
+
+	/* Hole */
+	if (chk_hole) {
+#ifdef HEAD_HOLE
+		if (lseek(fd, 0, SEEK_HOLE) != 0) {
+			fail("hh not found");
+			goto failed;
+		}
+
+		test_msg("Head hole OK\n");
+#endif
+
+		if (lseek(fd, DATA1_OFF, SEEK_HOLE) != DATA1_OFF + BUFSIZE) {
+			fail("mh not found");
+			goto failed;
+		}
+
+		test_msg("Mid hole OK\n");
+
+#ifdef TAIL_HOLE
+		if (lseek(fd, DATA2_OFF, SEEK_HOLE) != DATA2_OFF + BUFSIZE) {
+			fail("tail hole not found");
+			goto failed;
+		}
+
+		test_msg("Tail hole OK\n");
+#endif
+	}
+
+	close(fd);
+	pass();
+	return 0;
+
+failed:
+	close(fd);
+	return 1;
+}

test/zdtm/static/ghost_holes01.c

+ghost_holes00.c
\ No newline at end of file

test/zdtm/static/ghost_holes02.c

+ghost_holes00.c
\ No newline at end of file