[libvirt] [PATCH 4/9] Implement the public API for vol zeroing
---
src/libvirt.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 47 insertions(+), 0 deletions(-)
diff --git a/src/libvirt.c b/src/libvirt.c
index d9242bc..1434874 100644
--- a/src/libvirt.c
+++ b/src/libvirt.c
@@ -8468,6 +8468,53 @@ error:
/**
+ * virStorageVolZeroOut:
+ * @vol: pointer to storage volume
+ * @flags: future flags, use 0 for now
+ *
+ * Ensure that future reads from the storage volume return zeroes.
+ *
+ * Returns 0 on success, or -1 on error
+ */
+int
+virStorageVolZeroOut(virStorageVolPtr vol,
+ unsigned int flags)
+{
+ virConnectPtr conn;
+ VIR_DEBUG("vol=%p, flags=%u", vol, flags);
+
+ virResetLastError();
+
+ if (!VIR_IS_CONNECTED_STORAGE_VOL(vol)) {
+ virLibStorageVolError(NULL, VIR_ERR_INVALID_STORAGE_VOL, __FUNCTION__);
+ virDispatchError(NULL);
+ return (-1);
+ }
+
+ conn = vol->conn;
+ if (conn->flags & VIR_CONNECT_RO) {
+ virLibStorageVolError(vol, VIR_ERR_OPERATION_DENIED, __FUNCTION__);
+ goto error;
+ }
+
+ if (conn->storageDriver && conn->storageDriver->volZeroOut) {
+ int ret;
+ ret = conn->storageDriver->volZeroOut(vol, flags);
+ if (ret < 0) {
+ goto error;
+ }
+ return ret;
+ }
+
+ virLibConnError(conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
+
+error:
+ virDispatchError(vol->conn);
+ return -1;
+}
+
+
+/**
* virStorageVolFree:
* @vol: pointer to storage volume
*
--
1.6.5.5