X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fdevices%2Flnx_virtio_blk.c;h=fd9ec6191842c5dd41e5cbf89262484a0fc73444;hb=8a3dbb70c29175bad79764a0b2f3961b98138bb2;hp=7e26b3081566e8d51d71a2cc4dedc4376d81f422;hpb=aac189310cca0f5f14543d91413d3b5b58250a3e;p=palacios.git

diff --git a/palacios/src/devices/lnx_virtio_blk.c b/palacios/src/devices/lnx_virtio_blk.c
index 7e26b30..fd9ec61 100644
--- a/palacios/src/devices/lnx_virtio_blk.c
+++ b/palacios/src/devices/lnx_virtio_blk.c
@@ -26,7 +26,7 @@
 
 
 
-#ifndef CONFIG_DEBUG_VIRTIO_BLK
+#ifndef V3_CONFIG_DEBUG_VIRTIO_BLK
 #undef PrintDebug
 #define PrintDebug(fmt, args...)
 #endif
@@ -407,38 +407,44 @@ static int virtio_io_read(struct guest_info * core, uint16_t port, void * dst, u
     PrintDebug("VIRTIO BLOCK Read  for port %d (index =%d), length=%d\n", 
 	       port, port_idx, length);
 
+
     switch (port_idx) {
 	case HOST_FEATURES_PORT:
-	    if (length != 4) {
-		PrintError("Illegal read length for host features\n");
+	case HOST_FEATURES_PORT + 1:
+	case HOST_FEATURES_PORT + 2:
+	case HOST_FEATURES_PORT + 3:
+	    if (port_idx + length > HOST_FEATURES_PORT + 4) {
+		PrintError("Illegal read length for host features (len=%d)\n", length);
 		return -1;
 	    }
 
-	    *(uint32_t *)dst = blk_state->virtio_cfg.host_features;
-	
+	    memcpy(dst, &(blk_state->virtio_cfg.host_features), length);
 	    break;
 	case VRING_PG_NUM_PORT:
-	    if (length != 4) {
-		PrintError("Illegal read length for page frame number\n");
+	case VRING_PG_NUM_PORT + 1:
+	case VRING_PG_NUM_PORT + 2:
+	case VRING_PG_NUM_PORT + 3:
+	    if (port_idx + length > VRING_PG_NUM_PORT + 4) {
+		PrintError("Illegal read length for vring pg num (len=%d)\n", length);
 		return -1;
 	    }
 
-	    *(uint32_t *)dst = blk_state->queue.pfn;
-
+	    memcpy(dst, &(blk_state->queue.pfn), length);
 	    break;
 	case VRING_SIZE_PORT:
-	    if (length != 2) {
-		PrintError("Illegal read length for vring size\n");
+	case VRING_SIZE_PORT + 1:
+	    if (length > 2) {
+		PrintError("Illegal read length for vring size (len=%d)\n", length);
 		return -1;
 	    }
-		
-	    *(uint16_t *)dst = blk_state->queue.queue_size;
+	    
+	    memcpy(dst, &(blk_state->queue.queue_size), length);
 
 	    break;
 
 	case VIRTIO_STATUS_PORT:
 	    if (length != 1) {
-		PrintError("Illegal read length for status\n");
+		PrintError("Illegal read length for status (len=%d)\n", length);
 		return -1;
 	    }