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[Qemu-devel] [PATCH V3 5/5] libqblock test example code
From: |
Wenchao Xia |
Subject: |
[Qemu-devel] [PATCH V3 5/5] libqblock test example code |
Date: |
Tue, 18 Sep 2012 17:01:59 +0800 |
In this example, user first create two qcow2 images, and then get the
backing file relationship information of them. Then does write and read
sync IO on them.
Signed-off-by: Wenchao Xia <address@hidden>
---
tests/libqblock/libqblock-test.c | 233 ++++++++++++++++++++++++++++++++++++++
1 files changed, 233 insertions(+), 0 deletions(-)
diff --git a/tests/libqblock/libqblock-test.c b/tests/libqblock/libqblock-test.c
index c05c0c4..c0b7963 100644
--- a/tests/libqblock/libqblock-test.c
+++ b/tests/libqblock/libqblock-test.c
@@ -1,4 +1,237 @@
+/*
+ * QEMU block layer library test
+ *
+ * Copyright IBM, Corp. 2012
+ *
+ * Authors:
+ * Wenchao Xia <address@hidden>
+ *
+ * This work is licensed under the terms of the GNU LGPL, version 2 or later.
+ * See the COPYING.LIB file in the top-level directory.
+ *
+ */
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <inttypes.h>
+#include <string.h>
+#include <stdlib.h>
+#include "libqblock.h"
+
+#define TEST_BUF_SIZE 1024
+static unsigned char buf_r[TEST_BUF_SIZE];
+static unsigned char buf_w[TEST_BUF_SIZE] = {0, 0, 0, 0};
+
+typedef struct VerifyData {
+ unsigned char *buf_r;
+ unsigned char *buf_w;
+ int len;
+} VerifyData;
+
+static void print_loc(QBlockProtInfo *loc)
+{
+ if (loc == NULL) {
+ printf("backing file is NULL.");
+ return;
+ }
+ switch (loc->prot_type) {
+ case QB_PROT_NONE:
+ printf("protocol type [none].");
+ break;
+ case QB_PROT_FILE:
+ printf("protocol type [file], filename [%s].",
+ loc->prot_op.o_file.filename);
+ break;
+ default:
+ printf("protocol type not supported.");
+ break;
+ }
+}
+
+static void print_info_image_static(QBlockStaticInfo *info)
+{
+ printf("=======image location:\n");
+ print_loc(&info->loc);
+ printf("\nvirtual_size %" PRId64 ", format type %d [%s]",
+ *(info->member_addr->virt_size),
+ info->fmt.fmt_type, qb_fmttype2str(info->fmt.fmt_type));
+ printf("\nbacking image location:\n");
+ print_loc(info->member_addr->backing_loc);
+ printf("\n");
+}
+
+static void test_check(VerifyData *vdata)
+{
+ int cmp;
+ cmp = memcmp(vdata->buf_r, vdata->buf_w, vdata->len);
+ if (cmp == 0) {
+ printf("compare succeed, %d.\n", vdata->buf_r[24]);
+ } else {
+ printf("!!! compare fail, %d.\n", vdata->buf_r[24]);
+ exit(1);
+ }
+}
+
int main(int argc, char **argv)
{
+ const char *filename1, *filename2;
+ QBroker *broker = NULL;
+ QBlockState *qbs = NULL;
+ QBlockProtInfo *ol = NULL;
+ QBlockFmtInfo *of = NULL;
+ QBlockStaticInfo *info_st = NULL;
+ int ret, flag;
+ int test_offset = 510;
+ int test_len = 520;
+ VerifyData vdata;
+ char err_str[1024];
+
+ vdata.buf_r = buf_r;
+ vdata.buf_w = buf_w;
+ vdata.len = test_len;
+
+ filename1 = "./qemu_image1";
+ filename2 = "./qemu_image2";
+ printf("qemu test, filename1 is %s, filename2 is %s.\n",
+ filename1, filename2);
+
+ ret = qb_broker_new(&broker);
+ if (ret < 0) {
+ goto free;
+ }
+
+ ret = qb_state_new(broker, &qbs);
+ if (ret < 0) {
+ goto free;
+ }
+
+ ret = qb_prot_info_new(broker, &ol);
+ if (ret < 0) {
+ goto free;
+ }
+
+ ret = qb_fmt_info_new(broker, &of);
+ if (ret < 0) {
+ goto free;
+ }
+
+ /* create a new image */
+
+ ol->prot_type = QB_PROT_FILE;
+ ol->prot_op.o_file.filename = filename2;
+ of->fmt_type = QB_FMT_QCOW2;
+ of->fmt_op.o_qcow2.virt_size = 100 * 1024;
+ flag = 0;
+
+ ret = qb_create(broker, qbs, ol, of, flag);
+ if (ret < 0) {
+ qb_error_get_human_str(broker, err_str, sizeof(err_str));
+ printf("create fail 1. %s.\n", err_str);
+ goto unlink;
+ }
+
+ ol->prot_type = QB_PROT_FILE;
+ ol->prot_op.o_file.filename = filename1;
+ of->fmt_type = QB_FMT_QCOW2;
+ of->fmt_op.o_qcow2.backing_loc.prot_type = QB_PROT_FILE;
+ of->fmt_op.o_qcow2.backing_loc.prot_op.o_file.filename = filename2;
+ flag = 0;
+ ret = qb_create(broker, qbs, ol, of, flag);
+ if (ret < 0) {
+ qb_error_get_human_str(broker, err_str, sizeof(err_str));
+ printf("create fail 2. %s.\n", err_str);
+ goto unlink;
+ }
+
+ /* get informations */
+ ol->prot_type = QB_PROT_FILE;
+ ol->prot_op.o_file.filename = filename1;
+ of->fmt_type = QB_FMT_NONE;
+ flag = LIBQBLOCK_O_NO_BACKING;
+ ret = qb_open(broker, qbs, ol, of, flag);
+ if (ret < 0) {
+ qb_error_get_human_str(broker, err_str, sizeof(err_str));
+ printf("info getting, open failed. %s.\n", err_str);
+ goto free;
+ }
+
+ while (1) {
+ ret = qb_info_image_static_get(broker, qbs, &info_st);
+ if (ret < 0) {
+ qb_error_get_human_str(broker, err_str, sizeof(err_str));
+ printf("info get error. %s.\n", err_str);
+ goto close;
+ }
+ print_info_image_static(info_st);
+ qb_close(broker, qbs);
+ if ((info_st->member_addr->backing_loc == NULL) ||
+ (info_st->member_addr->backing_loc->prot_type == QB_FMT_NONE)) {
+ break;
+ }
+ *ol = *(info_st->member_addr->backing_loc);
+ ret = qb_open(broker, qbs, ol, of, flag);
+ if (ret < 0) {
+ qb_error_get_human_str(broker, err_str, sizeof(err_str));
+ printf("info getting, open failed in backing file. %s.\n",
+ err_str);
+ goto free;
+ }
+ qb_info_image_static_delete(broker, &info_st);
+ }
+ /* read and write the image */
+ ol->prot_type = QB_PROT_FILE;
+ ol->prot_op.o_file.filename = filename1;
+ of->fmt_type = QB_FMT_NONE;
+ flag = LIBQBLOCK_O_RDWR;
+ ret = qb_open(broker, qbs, ol, of, flag);
+ if (ret < 0) {
+ qb_error_get_human_str(broker, err_str, sizeof(err_str));
+ printf("open failed. %s.\n", err_str);
+ goto free;
+ }
+
+ buf_w[1] = 1;
+ buf_w[2] = 2;
+ buf_w[514] = 4;
+ memset(buf_r, 0, sizeof(buf_r));
+
+ ret = qb_write(broker, qbs, buf_w, test_len, test_offset);
+ if (ret < 0) {
+ qb_error_get_human_str(broker, err_str, sizeof(err_str));
+ printf("%s.\n", err_str);
+ goto close;
+ }
+
+ ret = qb_read(broker, qbs, buf_r, test_len, test_offset);
+ if (ret < 0) {
+ qb_error_get_human_str(broker, err_str, sizeof(err_str));
+ printf("%s.\n", err_str);
+ goto close;
+ }
+
+ test_check(&vdata);
+
+ close:
+ qb_close(broker, qbs);
+ unlink:
+ unlink(filename1);
+ unlink(filename2);
+ free:
+ if (info_st != NULL) {
+ qb_info_image_static_delete(broker, &info_st);
+ }
+ if (qbs != NULL) {
+ qb_state_delete(broker, &qbs);
+ }
+ if (ol != NULL) {
+ qb_prot_info_delete(broker, &ol);
+ }
+ if (of != NULL) {
+ qb_fmt_info_delete(broker, &of);
+ }
+ if (broker != NULL) {
+ qb_broker_delete(&broker);
+ }
return 0;
}
--
1.7.1