From a2a67eff18ac6e279bdd32f5feddcc0528d16245 Mon Sep 17 00:00:00 2001
From: Peter Krempa <pkrempa@redhat.com>
Date: Mon, 30 Jun 2014 15:05:07 +0200
Subject: [PATCH] storage: Implement virStorageFileCreate for local and gluster
 files

Add backends for this frontend function so that we can use it in the
snapshot creation code.
---
 src/storage/storage_backend_fs.c      | 17 +++++++++++++++++
 src/storage/storage_backend_gluster.c | 15 +++++++++++++++
 2 files changed, 32 insertions(+)

diff --git a/src/storage/storage_backend_fs.c b/src/storage/storage_backend_fs.c
index 2af5ab5268..378c553f0c 100644
--- a/src/storage/storage_backend_fs.c
+++ b/src/storage/storage_backend_fs.c
@@ -1386,6 +1386,22 @@ virStorageFileBackendFileInit(virStorageSourcePtr src)
 }
 
 
+static int
+virStorageFileBackendFileCreate(virStorageSourcePtr src)
+{
+    int fd = -1;
+
+    if ((fd = virFileOpenAs(src->path, O_WRONLY | O_TRUNC | O_CREAT, 0,
+                            src->drv->uid, src->drv->gid, 0)) < 0) {
+        errno = -fd;
+        return -1;
+    }
+
+    VIR_FORCE_CLOSE(fd);
+    return 0;
+}
+
+
 static int
 virStorageFileBackendFileUnlink(virStorageSourcePtr src)
 {
@@ -1470,6 +1486,7 @@ virStorageFileBackend virStorageFileBackendFile = {
     .backendInit = virStorageFileBackendFileInit,
     .backendDeinit = virStorageFileBackendFileDeinit,
 
+    .storageFileCreate = virStorageFileBackendFileCreate,
     .storageFileUnlink = virStorageFileBackendFileUnlink,
     .storageFileStat = virStorageFileBackendFileStat,
     .storageFileReadHeader = virStorageFileBackendFileReadHeader,
diff --git a/src/storage/storage_backend_gluster.c b/src/storage/storage_backend_gluster.c
index 052f58d208..38d02acfa2 100644
--- a/src/storage/storage_backend_gluster.c
+++ b/src/storage/storage_backend_gluster.c
@@ -633,6 +633,20 @@ virStorageFileBackendGlusterInit(virStorageSourcePtr src)
 }
 
 
+static int
+virStorageFileBackendGlusterCreate(virStorageSourcePtr src)
+{
+    virStorageFileBackendGlusterPrivPtr priv = src->drv->priv;
+    glfs_fd_t *fd = NULL;
+
+    if (!(fd = glfs_open(priv->vol, src->path, O_CREAT | O_TRUNC | O_WRONLY)))
+        return -1;
+
+    ignore_value(glfs_close(fd));
+    return 0;
+}
+
+
 static int
 virStorageFileBackendGlusterUnlink(virStorageSourcePtr src)
 {
@@ -780,6 +794,7 @@ virStorageFileBackend virStorageFileBackendGluster = {
     .backendInit = virStorageFileBackendGlusterInit,
     .backendDeinit = virStorageFileBackendGlusterDeinit,
 
+    .storageFileCreate = virStorageFileBackendGlusterCreate,
     .storageFileUnlink = virStorageFileBackendGlusterUnlink,
     .storageFileStat = virStorageFileBackendGlusterStat,
     .storageFileReadHeader = virStorageFileBackendGlusterReadHeader,