added state checks for VM control commands

[palacios.git] / palacios / src / devices / tmpdisk.c

diff --git a/palacios/src/devices/tmpdisk.c b/palacios/src/devices/tmpdisk.c
index b573cf6..879dc33 100644 (file)
--- a/palacios/src/devices/tmpdisk.c
+++ b/palacios/src/devices/tmpdisk.c
@@ -73,8 +73,11 @@ static int blk_write(uint8_t * buf,  uint64_t lba, uint64_t num_bytes, void * pr
 }
 
 
-static int blk_free(struct vm_device * dev) {
-    return -1;
+static int blk_free(struct blk_state * blk) {
+    V3_FreePages((void *)blk->blk_base_addr, blk->capacity / 4096);
+
+    V3_Free(blk);
+    return 0;
 }
 
 
@@ -87,19 +90,17 @@ static struct v3_dev_blk_ops blk_ops = {
 
 
 static struct v3_device_ops dev_ops = {
-    .free = blk_free,
-    .reset = NULL,
-    .start = NULL,
-    .stop = NULL,
+    .free = (int (*)(void *))blk_free,
+
 };
 
 
 
 
-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");
+    char * dev_id = v3_cfg_val(cfg, "ID");
     uint64_t capacity = atoi(v3_cfg_val(cfg, "size")) * 1024 * 1024;
     
     if (!frontend_cfg) {
@@ -112,24 +113,38 @@ static int blk_init(struct guest_info * vm, v3_cfg_tree_t * cfg) {
 
     blk = (struct blk_state *)V3_Malloc(sizeof(struct blk_state));
 
+    if (!blk) {
+       PrintError("Cannot allocate in init\n");
+       return -1;
+    }
+
     blk->capacity = capacity;
     
     blk->blk_base_addr = (addr_t)V3_AllocPages(blk->capacity / 4096);
+
+    if (!blk->blk_base_addr) { 
+       PrintError("Cannot allocate block space\n");
+       V3_Free(blk);
+       return -1;
+    }
+
     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_add_device(vm, dev_id, &dev_ops, blk);
 
-    if (v3_attach_device(vm, dev) == -1) {
-       PrintError("Could not attach device %s\n", name);
+    if (dev == NULL) {
+       PrintError("Could not attach device %s\n", dev_id);
+       V3_Free(blk);
        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"));
+       v3_remove_device(dev);
        return -1;
     }