X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fdevices%2Ftmpdisk.c;h=bf582e775fd5ef24950ace262b8b38ca04c3c6d8;hb=1df601c90b519a54b64ca101fd6aa4c0a39bf0f0;hp=a40aa556903b2eb6ae02a81f5ea0b749b35212f5;hpb=123a1ba27ea09c8fa77a1b36ce625b43d7c48b14;p=palacios.git

diff --git a/palacios/src/devices/tmpdisk.c b/palacios/src/devices/tmpdisk.c
index a40aa55..bf582e7 100644
--- a/palacios/src/devices/tmpdisk.c
+++ b/palacios/src/devices/tmpdisk.c
@@ -23,8 +23,8 @@
 
 struct blk_state {
     uint64_t capacity;
-    uint8_t * blk_space;
     addr_t blk_base_addr;
+    uint8_t * blk_space;
 };
 
 
@@ -32,7 +32,7 @@ struct blk_state {
 static uint64_t blk_get_capacity(void * private_data) {
     struct blk_state * blk = (struct blk_state *)private_data;
 
-    PrintDebug("SymBlk: Getting Capacity %d\n", (uint32_t)(blk->capacity));
+    //  PrintDebug("SymBlk: Getting Capacity %d\n", (uint32_t)(blk->capacity));
 
     return blk->capacity;
 }
@@ -42,6 +42,13 @@ static uint64_t blk_get_capacity(void * private_data) {
 static int blk_read(uint8_t * buf, uint64_t lba, uint64_t num_bytes, void * private_data) {
     struct blk_state * blk = (struct blk_state *)private_data;
 
+    //    PrintDebug("TmpDisk Reading %d bytes to %p (lba=%p)\n", (uint32_t)num_bytes, buf, (void *)(addr_t)lba);
+
+    if (lba + num_bytes > blk->capacity) {
+	PrintError("TMPDISK Read past end of disk\n");
+	return -1;
+    }
+
     memcpy(buf, blk->blk_space + lba, num_bytes);
 
     return 0;
@@ -53,6 +60,13 @@ static int blk_read(uint8_t * buf, uint64_t lba, uint64_t num_bytes, void * priv
 static int blk_write(uint8_t * buf,  uint64_t lba, uint64_t num_bytes, void * private_data) {
     struct blk_state * blk = (struct blk_state *)private_data;
 
+    //    PrintDebug("TmpDisk Writing %d bytes to %p (lba=%p)\n", (uint32_t)num_bytes, buf, (void *)(addr_t)lba);
+
+    if (lba + num_bytes > blk->capacity) {
+	PrintError("TMPDISK Write past end of disk\n");
+	return -1;
+    }
+
     memcpy(blk->blk_space + lba, buf, num_bytes);
 
     return 0;
@@ -82,40 +96,40 @@ static struct v3_device_ops dev_ops = {
 
 
 
-static int blk_init(struct guest_info * vm, v3_cfg_tree_t * cfg) {
+static int blk_init(struct v3_vm_info * vm, v3_cfg_tree_t * cfg) {
     struct blk_state * blk = NULL;
     v3_cfg_tree_t * frontend_cfg = v3_cfg_subtree(cfg, "frontend");
-    char * name = v3_cfg_val(cfg, "name");
-    uint64_t capacity = atoi(v3_cfg_val(cfg, "size"));
+    char * dev_id = v3_cfg_val(cfg, "ID");
+    uint64_t capacity = atoi(v3_cfg_val(cfg, "size")) * 1024 * 1024;
     
     if (!frontend_cfg) {
 	PrintError("Frontend Configuration not present\n");
 	return -1;
     }
 
-    PrintDebug("Creating Blk Device\n");
+    PrintDebug("Intializing TMPDISK (capacity=%d)\n", (uint32_t)capacity);
 
 
-    blk = (struct blk_state *)V3_Malloc(sizeof(struct blk_state) + ((capacity / 4096) / 8));
+    blk = (struct blk_state *)V3_Malloc(sizeof(struct blk_state));
 
     blk->capacity = capacity;
-
-    blk->blk_base_addr = (addr_t)V3_AllocPages(capacity / 4096);
+    
+    blk->blk_base_addr = (addr_t)V3_AllocPages(blk->capacity / 4096);
     blk->blk_space = (uint8_t *)V3_VAddr((void *)(blk->blk_base_addr));
     memset(blk->blk_space, 0, capacity);
 
 
-    struct vm_device * dev = v3_allocate_device(name, &dev_ops, blk);
+    struct vm_device * dev = v3_allocate_device(dev_id, &dev_ops, blk);
 
     if (v3_attach_device(vm, dev) == -1) {
-	PrintError("Could not attach device %s\n", name);
+	PrintError("Could not attach device %s\n", dev_id);
 	return -1;
     }
 
     if (v3_dev_connect_blk(vm, v3_cfg_val(frontend_cfg, "tag"), 
 			   &blk_ops, frontend_cfg, blk) == -1) {
 	PrintError("Could not connect %s to frontend %s\n", 
-		   name, v3_cfg_val(frontend_cfg, "tag"));
+		   dev_id, v3_cfg_val(frontend_cfg, "tag"));
 	return -1;
     }