hw/block: Request permissions

This makes all device emulations with a qdev drive property request
permissions on their BlockBackend. The only thing we block at this point
is resizing images for some devices that can't support it.

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

1 files changed, 8 insertions, 0 deletions

diff --git a/hw/nvram/spapr_nvram.c b/hw/nvram/spapr_nvram.c
index 65ba188555..aa5d2c1f5f 100644
--- a/hw/nvram/spapr_nvram.c
+++ b/hw/nvram/spapr_nvram.c
@@ -141,9 +141,17 @@ static void rtas_nvram_store(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 static void spapr_nvram_realize(VIOsPAPRDevice *dev, Error **errp)
 {
     sPAPRNVRAM *nvram = VIO_SPAPR_NVRAM(dev);
+    int ret;
 
     if (nvram->blk) {
         nvram->size = blk_getlength(nvram->blk);
+
+        ret = blk_set_perm(nvram->blk,
+                           BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE,
+                           BLK_PERM_ALL, errp);
+        if (ret < 0) {
+            return;
+        }
     } else {
         nvram->size = DEFAULT_NVRAM_SIZE;
     }