block: Allow reference for bdrv_file_open()

Allow specifying a reference to an existing block device (by name) for
bdrv_file_open() instead of a filename and/or options.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

9 files changed, 16 insertions, 14 deletions

diff --git a/block/blkdebug.c b/block/blkdebug.c
index 0bf3bb518a..21a4931594 100644
--- a/block/blkdebug.c
+++ b/block/blkdebug.c
@@ -403,7 +403,7 @@ static int blkdebug_open(BlockDriverState *bs, QDict *options, int flags,
         goto fail;
     }
 
-    ret = bdrv_file_open(&bs->file, filename, NULL, flags, &local_err);
+    ret = bdrv_file_open(&bs->file, filename, NULL, NULL, flags, &local_err);
     if (ret < 0) {
         error_propagate(errp, local_err);
         goto fail;
diff --git a/block/blkverify.c b/block/blkverify.c
index 1c1637f55e..e15ac4ca69 100644
--- a/block/blkverify.c
+++ b/block/blkverify.c
@@ -141,7 +141,7 @@ static int blkverify_open(BlockDriverState *bs, QDict *options, int flags,
         goto fail;
     }
 
-    ret = bdrv_file_open(&bs->file, raw, NULL, flags, &local_err);
+    ret = bdrv_file_open(&bs->file, raw, NULL, NULL, flags, &local_err);
     if (ret < 0) {
         error_propagate(errp, local_err);
         goto fail;
diff --git a/block/cow.c b/block/cow.c
index dc15e46b6c..7fc0b12163 100644
--- a/block/cow.c
+++ b/block/cow.c
@@ -351,7 +351,8 @@ static int cow_create(const char *filename, QEMUOptionParameter *options,
         return ret;
     }
 
-    ret = bdrv_file_open(&cow_bs, filename, NULL, BDRV_O_RDWR, &local_err);
+    ret = bdrv_file_open(&cow_bs, filename, NULL, NULL, BDRV_O_RDWR,
+                         &local_err);
     if (ret < 0) {
         qerror_report_err(local_err);
         error_free(local_err);
diff --git a/block/qcow.c b/block/qcow.c
index c470e05f60..948b0c5601 100644
--- a/block/qcow.c
+++ b/block/qcow.c
@@ -691,7 +691,8 @@ static int qcow_create(const char *filename, QEMUOptionParameter *options,
         return ret;
     }
 
-    ret = bdrv_file_open(&qcow_bs, filename, NULL, BDRV_O_RDWR, &local_err);
+    ret = bdrv_file_open(&qcow_bs, filename, NULL, NULL, BDRV_O_RDWR,
+                         &local_err);
     if (ret < 0) {
         qerror_report_err(local_err);
         error_free(local_err);
diff --git a/block/qcow2.c b/block/qcow2.c
index 8ec9db10f8..e15a4dd057 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -1483,7 +1483,7 @@ static int qcow2_create2(const char *filename, int64_t total_size,
         return ret;
     }
 
-    ret = bdrv_file_open(&bs, filename, NULL, BDRV_O_RDWR, &local_err);
+    ret = bdrv_file_open(&bs, filename, NULL, NULL, BDRV_O_RDWR, &local_err);
     if (ret < 0) {
         error_propagate(errp, local_err);
         return ret;
diff --git a/block/qed.c b/block/qed.c
index 450a1fa2e9..0dd5c5859e 100644
--- a/block/qed.c
+++ b/block/qed.c
@@ -563,8 +563,8 @@ static int qed_create(const char *filename, uint32_t cluster_size,
         return ret;
     }
 
-    ret = bdrv_file_open(&bs, filename, NULL, BDRV_O_RDWR | BDRV_O_CACHE_WB,
-                         &local_err);
+    ret = bdrv_file_open(&bs, filename, NULL, NULL,
+                         BDRV_O_RDWR | BDRV_O_CACHE_WB, &local_err);
     if (ret < 0) {
         qerror_report_err(local_err);
         error_free(local_err);
diff --git a/block/sheepdog.c b/block/sheepdog.c
index 6088fa5571..2ce3d9b9fb 100644
--- a/block/sheepdog.c
+++ b/block/sheepdog.c
@@ -1534,7 +1534,7 @@ static int sd_prealloc(const char *filename)
     Error *local_err = NULL;
     int ret;
 
-    ret = bdrv_file_open(&bs, filename, NULL, BDRV_O_RDWR, &local_err);
+    ret = bdrv_file_open(&bs, filename, NULL, NULL, BDRV_O_RDWR, &local_err);
     if (ret < 0) {
         qerror_report_err(local_err);
         error_free(local_err);
@@ -1695,7 +1695,7 @@ static int sd_create(const char *filename, QEMUOptionParameter *options,
             goto out;
         }
 
-        ret = bdrv_file_open(&bs, backing_file, NULL, 0, &local_err);
+        ret = bdrv_file_open(&bs, backing_file, NULL, NULL, 0, &local_err);
         if (ret < 0) {
             qerror_report_err(local_err);
             error_free(local_err);
diff --git a/block/vhdx.c b/block/vhdx.c
index 1995778945..9ee0a612ff 100644
--- a/block/vhdx.c
+++ b/block/vhdx.c
@@ -1797,7 +1797,7 @@ static int vhdx_create(const char *filename, QEMUOptionParameter *options,
         goto exit;
     }
 
-    ret = bdrv_file_open(&bs, filename, NULL, BDRV_O_RDWR, &local_err);
+    ret = bdrv_file_open(&bs, filename, NULL, NULL, BDRV_O_RDWR, &local_err);
     if (ret < 0) {
         error_propagate(errp, local_err);
         goto exit;
diff --git a/block/vmdk.c b/block/vmdk.c
index 22b99b04ac..599a928545 100644
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -769,8 +769,8 @@ static int vmdk_parse_extents(const char *desc, BlockDriverState *bs,
 
         path_combine(extent_path, sizeof(extent_path),
                 desc_file_path, fname);
-        ret = bdrv_file_open(&extent_file, extent_path, NULL, bs->open_flags,
-                             errp);
+        ret = bdrv_file_open(&extent_file, extent_path, NULL, NULL,
+                             bs->open_flags, errp);
         if (ret) {
             return ret;
         }
@@ -1469,7 +1469,7 @@ static int vmdk_create_extent(const char *filename, int64_t filesize,
         goto exit;
     }
 
-    ret = bdrv_file_open(&bs, filename, NULL, BDRV_O_RDWR, &local_err);
+    ret = bdrv_file_open(&bs, filename, NULL, NULL, BDRV_O_RDWR, &local_err);
     if (ret < 0) {
         error_propagate(errp, local_err);
         goto exit;
@@ -1807,7 +1807,7 @@ static int vmdk_create(const char *filename, QEMUOptionParameter *options,
             goto exit;
         }
     }
-    ret = bdrv_file_open(&new_bs, filename, NULL, BDRV_O_RDWR, &local_err);
+    ret = bdrv_file_open(&new_bs, filename, NULL, NULL, BDRV_O_RDWR, &local_err);
     if (ret < 0) {
         error_setg_errno(errp, -ret, "Could not write description");
         goto exit;