[Qemu-devel] [PATCH 2/5] block: Drop drv parameter from bdrv_open()

[Max Reitz <mreitz@redhat.com>]

Now that this parameter is effectively unused, we can drop it and just
pass NULL on to bdrv_open_inherit().

Signed-off-by: Max Reitz <mreitz@redhat.com>
---
 block.c               | 9 ++++-----
 block/block-backend.c | 2 +-
 block/parallels.c     | 2 +-
 block/qcow.c          | 2 +-
 block/qcow2.c         | 6 +++---
 block/qed.c           | 2 +-
 block/sheepdog.c      | 5 ++---
 block/vdi.c           | 2 +-
 block/vhdx.c          | 2 +-
 block/vmdk.c          | 7 +++----
 block/vpc.c           | 2 +-
 block/vvfat.c         | 2 +-
 blockdev.c            | 8 ++++----
 include/block/block.h | 3 +--
 14 files changed, 25 insertions(+), 29 deletions(-)

diff --git a/block.c b/block.c
index 193daf9..ac89487 100644
--- a/block.c
+++ b/block.c
@@ -1391,7 +1391,7 @@ int bdrv_append_temp_snapshot(BlockDriverState *bs, int flags, Error **errp)
     bs_snapshot = bdrv_new();
 
     ret = bdrv_open(&bs_snapshot, NULL, NULL, snapshot_options,
-                    flags, NULL, &local_err);
+                    flags, &local_err);
     if (ret < 0) {
         error_propagate(errp, local_err);
         goto out;
@@ -1637,11 +1637,10 @@ close_and_fail:
 }
 
 int bdrv_open(BlockDriverState **pbs, const char *filename,
-              const char *reference, QDict *options, int flags,
-              BlockDriver *drv, Error **errp)
+              const char *reference, QDict *options, int flags, Error **errp)
 {
     return bdrv_open_inherit(pbs, filename, reference, options, flags, NULL,
-                             NULL, drv, errp);
+                             NULL, NULL, errp);
 }
 
 typedef struct BlockReopenQueueEntry {
@@ -3846,7 +3845,7 @@ void bdrv_img_create(const char *filename, const char *fmt,
 
             bs = NULL;
             ret = bdrv_open(&bs, full_backing, NULL, backing_options,
-                            back_flags, NULL, &local_err);
+                            back_flags, &local_err);
             g_free(full_backing);
             if (ret < 0) {
                 goto out;
diff --git a/block/block-backend.c b/block/block-backend.c
index aee8a12..c2e8732 100644
--- a/block/block-backend.c
+++ b/block/block-backend.c
@@ -126,7 +126,7 @@ BlockBackend *blk_new_open(const char *name, const char *filename,
         return NULL;
     }
 
-    ret = bdrv_open(&blk->bs, filename, reference, options, flags, NULL, errp);
+    ret = bdrv_open(&blk->bs, filename, reference, options, flags, errp);
     if (ret < 0) {
         blk_unref(blk);
         return NULL;
diff --git a/block/parallels.c b/block/parallels.c
index 046b568..5cd6ec3 100644
--- a/block/parallels.c
+++ b/block/parallels.c
@@ -476,7 +476,7 @@ static int parallels_create(const char *filename, QemuOpts *opts, Error **errp)
 
     file = NULL;
     ret = bdrv_open(&file, filename, NULL, NULL,
-                    BDRV_O_RDWR | BDRV_O_PROTOCOL, NULL, &local_err);
+                    BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err);
     if (ret < 0) {
         error_propagate(errp, local_err);
         return ret;
diff --git a/block/qcow.c b/block/qcow.c
index 01fba54..6e35db1 100644
--- a/block/qcow.c
+++ b/block/qcow.c
@@ -793,7 +793,7 @@ static int qcow_create(const char *filename, QemuOpts *opts, Error **errp)
 
     qcow_bs = NULL;
     ret = bdrv_open(&qcow_bs, filename, NULL, NULL,
-                    BDRV_O_RDWR | BDRV_O_PROTOCOL, NULL, &local_err);
+                    BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err);
     if (ret < 0) {
         error_propagate(errp, local_err);
         goto cleanup;
diff --git a/block/qcow2.c b/block/qcow2.c
index 867b43b..a707d8d 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -1975,7 +1975,7 @@ static int qcow2_create2(const char *filename, int64_t total_size,
 
     bs = NULL;
     ret = bdrv_open(&bs, filename, NULL, NULL, BDRV_O_RDWR | BDRV_O_PROTOCOL,
-                    NULL, &local_err);
+                    &local_err);
     if (ret < 0) {
         error_propagate(errp, local_err);
         return ret;
@@ -2038,7 +2038,7 @@ static int qcow2_create2(const char *filename, int64_t total_size,
     qdict_put(options, "driver", qstring_from_str("qcow2"));
     ret = bdrv_open(&bs, filename, NULL, options,
                     BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH,
-                    NULL, &local_err);
+                    &local_err);
     if (ret < 0) {
         error_propagate(errp, local_err);
         goto out;
@@ -2092,7 +2092,7 @@ static int qcow2_create2(const char *filename, int64_t total_size,
     qdict_put(options, "driver", qstring_from_str("qcow2"));
     ret = bdrv_open(&bs, filename, NULL, options,
                     BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_NO_BACKING,
-                    NULL, &local_err);
+                    &local_err);
     if (local_err) {
         error_propagate(errp, local_err);
         goto out;
diff --git a/block/qed.c b/block/qed.c
index 954ed00..a7ff1d9 100644
--- a/block/qed.c
+++ b/block/qed.c
@@ -583,7 +583,7 @@ static int qed_create(const char *filename, uint32_t cluster_size,
 
     bs = NULL;
     ret = bdrv_open(&bs, filename, NULL, NULL,
-                    BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_PROTOCOL, NULL,
+                    BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_PROTOCOL,
                     &local_err);
     if (ret < 0) {
         error_propagate(errp, local_err);
diff --git a/block/sheepdog.c b/block/sheepdog.c
index 9585beb..67ca788 100644
--- a/block/sheepdog.c
+++ b/block/sheepdog.c
@@ -1554,7 +1554,7 @@ static int sd_prealloc(const char *filename, Error **errp)
     int ret;
 
     ret = bdrv_open(&bs, filename, NULL, NULL, BDRV_O_RDWR | BDRV_O_PROTOCOL,
-                    NULL, errp);
+                    errp);
     if (ret < 0) {
         goto out_with_err_set;
     }
@@ -1746,8 +1746,7 @@ static int sd_create(const char *filename, QemuOpts *opts,
         }
 
         bs = NULL;
-        ret = bdrv_open(&bs, backing_file, NULL, NULL, BDRV_O_PROTOCOL, NULL,
-                        errp);
+        ret = bdrv_open(&bs, backing_file, NULL, NULL, BDRV_O_PROTOCOL, errp);
         if (ret < 0) {
             goto out;
         }
diff --git a/block/vdi.c b/block/vdi.c
index 7642ef3..062a654 100644
--- a/block/vdi.c
+++ b/block/vdi.c
@@ -764,7 +764,7 @@ static int vdi_create(const char *filename, QemuOpts *opts, Error **errp)
         goto exit;
     }
     ret = bdrv_open(&bs, filename, NULL, NULL, BDRV_O_RDWR | BDRV_O_PROTOCOL,
-                    NULL, &local_err);
+                    &local_err);
     if (ret < 0) {
         error_propagate(errp, local_err);
         goto exit;
diff --git a/block/vhdx.c b/block/vhdx.c
index 0776de7..58f0aae 100644
--- a/block/vhdx.c
+++ b/block/vhdx.c
@@ -1842,7 +1842,7 @@ static int vhdx_create(const char *filename, QemuOpts *opts, Error **errp)
 
     bs = NULL;
     ret = bdrv_open(&bs, filename, NULL, NULL, BDRV_O_RDWR | BDRV_O_PROTOCOL,
-                    NULL, &local_err);
+                    &local_err);
     if (ret < 0) {
         error_propagate(errp, local_err);
         goto exit;
diff --git a/block/vmdk.c b/block/vmdk.c
index fbaab67..7bdc3d0 100644
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -1632,7 +1632,7 @@ static int vmdk_create_extent(const char *filename, int64_t filesize,
 
     assert(bs == NULL);
     ret = bdrv_open(&bs, filename, NULL, NULL, BDRV_O_RDWR | BDRV_O_PROTOCOL,
-                    NULL, &local_err);
+                    &local_err);
     if (ret < 0) {
         error_propagate(errp, local_err);
         goto exit;
@@ -1905,8 +1905,7 @@ static int vmdk_create(const char *filename, QemuOpts *opts, Error **errp)
             ret = -ENOENT;
             goto exit;
         }
-        ret = bdrv_open(&bs, full_backing, NULL, NULL, BDRV_O_NO_BACKING, NULL,
-                        errp);
+        ret = bdrv_open(&bs, full_backing, NULL, NULL, BDRV_O_NO_BACKING, errp);
         g_free(full_backing);
         if (ret != 0) {
             goto exit;
@@ -1977,7 +1976,7 @@ static int vmdk_create(const char *filename, QemuOpts *opts, Error **errp)
     }
     assert(new_bs == NULL);
     ret = bdrv_open(&new_bs, filename, NULL, NULL,
-                    BDRV_O_RDWR | BDRV_O_PROTOCOL, NULL, &local_err);
+                    BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err);
     if (ret < 0) {
         error_propagate(errp, local_err);
         goto exit;
diff --git a/block/vpc.c b/block/vpc.c
index 3e385d9..2b3b518 100644
--- a/block/vpc.c
+++ b/block/vpc.c
@@ -794,7 +794,7 @@ static int vpc_create(const char *filename, QemuOpts *opts, Error **errp)
         goto out;
     }
     ret = bdrv_open(&bs, filename, NULL, NULL, BDRV_O_RDWR | BDRV_O_PROTOCOL,
-                    NULL, &local_err);
+                    &local_err);
     if (ret < 0) {
         error_propagate(errp, local_err);
         goto out;
diff --git a/block/vvfat.c b/block/vvfat.c
index bffe8ad..7ddc962 100644
--- a/block/vvfat.c
+++ b/block/vvfat.c
@@ -2962,7 +2962,7 @@ static int enable_write_target(BDRVVVFATState *s, Error **errp)
     qdict_put(options, "driver", qstring_from_str("qcow"));
     ret = bdrv_open(&s->qcow, s->qcow_filename, NULL, options,
                     BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH,
-                    NULL, errp);
+                    errp);
     if (ret < 0) {
         goto err;
     }
diff --git a/blockdev.c b/blockdev.c
index 4528fbe..801858e 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -1521,7 +1521,7 @@ static void external_snapshot_prepare(BlkTransactionState *common,
      * extended QMP command? */
     assert(state->new_bs == NULL);
     ret = bdrv_open(&state->new_bs, new_image_file, NULL, options,
-                    flags | BDRV_O_NO_BACKING, NULL, &local_err);
+                    flags | BDRV_O_NO_BACKING, &local_err);
     /* We will manually add the backing_hd field to the bs later */
     if (ret != 0) {
         error_propagate(errp, local_err);
@@ -1895,7 +1895,7 @@ static void qmp_bdrv_open_encrypted(BlockDriverState *bs, const char *filename,
         qdict_put(options, "driver", qstring_from_str(format));
     }
 
-    ret = bdrv_open(&bs, filename, NULL, options, bdrv_flags, NULL, &local_err);
+    ret = bdrv_open(&bs, filename, NULL, options, bdrv_flags, &local_err);
     if (ret < 0) {
         error_propagate(errp, local_err);
         return;
@@ -2540,7 +2540,7 @@ void qmp_drive_backup(const char *device, const char *target,
     }
 
     target_bs = NULL;
-    ret = bdrv_open(&target_bs, target, NULL, options, flags, NULL, &local_err);
+    ret = bdrv_open(&target_bs, target, NULL, options, flags, &local_err);
     if (ret < 0) {
         error_propagate(errp, local_err);
         goto out;
@@ -2795,7 +2795,7 @@ void qmp_drive_mirror(const char *device, const char *target,
      */
     target_bs = NULL;
     ret = bdrv_open(&target_bs, target, NULL, options,
-                    flags | BDRV_O_NO_BACKING, NULL, &local_err);
+                    flags | BDRV_O_NO_BACKING, &local_err);
     if (ret < 0) {
         error_propagate(errp, local_err);
         goto out;
diff --git a/include/block/block.h b/include/block/block.h
index 37916f7..67556c4 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -218,8 +218,7 @@ void bdrv_set_backing_hd(BlockDriverState *bs, BlockDriverState *backing_hd);
 int bdrv_open_backing_file(BlockDriverState *bs, QDict *options, Error **errp);
 int bdrv_append_temp_snapshot(BlockDriverState *bs, int flags, Error **errp);
 int bdrv_open(BlockDriverState **pbs, const char *filename,
-              const char *reference, QDict *options, int flags,
-              BlockDriver *drv, Error **errp);
+              const char *reference, QDict *options, int flags, Error **errp);
 BlockReopenQueue *bdrv_reopen_queue(BlockReopenQueue *bs_queue,
                                     BlockDriverState *bs, int flags);
 int bdrv_reopen_multiple(BlockReopenQueue *bs_queue, Error **errp);
-- 
2.4.6