[sheepdog] [PATCH 2/5] shared lib: add VDI operation: create

[Yu Yang]

From: Yu Yang <yuyang at cmss.chinamobile.com>

Create a new VDI from the given name and size.
In the first version, all other attribution is the
default value.

Signed-off-by: Yu Yang <yuyang at cmss.chinamobile.com>
---
 lib/shared/sheepdog.h |   11 +++++++++++
 lib/shared/vdi.c      |   46 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 57 insertions(+)

diff --git a/lib/shared/sheepdog.h b/lib/shared/sheepdog.h
index dd36bbe..f49ecdd 100644
--- a/lib/shared/sheepdog.h
+++ b/lib/shared/sheepdog.h
@@ -137,4 +137,15 @@ int sd_vdi_close(struct sd_vdi *vdi);
  */
 int sd_vdi_snapshot(struct sd_cluster *c, char *name, char *tag);
 
+/*
+ * Create a VDI in the specified cluster
+ *
+ * @c: pointer to the cluster descriptor
+ * @name: the name of the VDI to be created
+ * @size: the size(Byte) of the VDI to be created
+ *
+ * Return error code defined in sheepdog_proto.h.
+ */
+int sd_vdi_create(struct sd_cluster *c, char *name, uint64_t size);
+
 #endif
diff --git a/lib/shared/vdi.c b/lib/shared/vdi.c
index 2646d6f..064d04d 100644
--- a/lib/shared/vdi.c
+++ b/lib/shared/vdi.c
@@ -396,3 +396,49 @@ out:
 
 	return ret;
 }
+
+int sd_vdi_create(struct sd_cluster *c, char *name, uint64_t size)
+{
+	struct sd_req hdr = {};
+	struct cluster_info ci;
+	int ret;
+
+	if (size > SD_MAX_VDI_SIZE) {
+		fprintf(stderr, "VDI size is too large\n");
+		return SD_RES_INVALID_PARMS;
+	} else if (size == 0) {
+		fprintf(stderr, "VDI size can NOT be ZERO\n");
+		return SD_RES_INVALID_PARMS;
+	}
+
+	if (!name || *name == '\0') {
+		fprintf(stderr, "VDI name can NOT be null\n");
+		return SD_RES_INVALID_PARMS;
+	}
+
+	sd_init_req(&hdr, SD_OP_CLUSTER_INFO);
+	hdr.data_length = sizeof(ci);
+	ret = sd_run_sdreq(c, &hdr, &ci);
+	if (ret != SD_RES_SUCCESS) {
+		fprintf(stderr, "Failed to get cluster info: %s\n",
+				sd_strerror(ret));
+		return ret;
+	}
+	if (!ci.ctime) {
+		fprintf(stderr, "%s\n", sd_strerror(SD_RES_WAIT_FOR_FORMAT));
+		return SD_RES_WAIT_FOR_FORMAT;
+	}
+
+	uint8_t store_policy = 0;
+	if (size > SD_OLD_MAX_VDI_SIZE)
+		store_policy = 1;/** for hyper volume **/
+
+	ret = do_vdi_create(c, name, size,
+			0, false, ci.nr_copies, ci.copy_policy,
+			store_policy, SD_DEFAULT_BLOCK_SIZE_SHIFT);
+	if (ret != SD_RES_SUCCESS)
+		fprintf(stderr, "Failed to create VDI %s: %s\n",
+				name, sd_strerror(ret));
+
+	return ret;
+}
-- 
1.7.9.5