--- /dev/null
+/*
+ * This file is part of the Palacios Virtual Machine Monitor developed
+ * by the V3VEE Project with funding from the United States National
+ * Science Foundation and the Department of Energy.
+ *
+ * The V3VEE Project is a joint project between Northwestern University
+ * and the University of New Mexico. You can find out more at
+ * http://www.v3vee.org
+ *
+ * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
+ * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
+ * All rights reserved.
+ *
+ * Author: Jack Lange <jarusl@cs.northwestern.edu>
+ *
+ * This is free software. You are permitted to use,
+ * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
+ */
+
+#include <palacios/vmm.h>
+#include <palacios/vmm_dev_mgr.h>
+
+
+struct blk_state {
+ uint64_t capacity;
+ uint8_t * blk_space;
+ addr_t blk_base_addr;
+};
+
+
+
+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));
+
+ return blk->capacity;
+}
+
+
+
+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;
+
+ memcpy(buf, blk->blk_space + lba, num_bytes);
+
+ return 0;
+}
+
+
+
+
+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;
+
+ memcpy(blk->blk_space + lba, buf, num_bytes);
+
+ return 0;
+}
+
+
+static int blk_free(struct vm_device * dev) {
+ return -1;
+}
+
+
+static struct v3_dev_blk_ops blk_ops = {
+ .read = blk_read,
+ .write = blk_write,
+ .get_capacity = blk_get_capacity,
+};
+
+
+
+static struct v3_device_ops dev_ops = {
+ .free = blk_free,
+ .reset = NULL,
+ .start = NULL,
+ .stop = NULL,
+};
+
+
+
+
+static int blk_init(struct guest_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"));
+
+ if (!frontend_cfg) {
+ PrintError("Frontend Configuration not present\n");
+ return -1;
+ }
+
+ PrintDebug("Creating Blk Device\n");
+
+
+ blk = (struct blk_state *)V3_Malloc(sizeof(struct blk_state) + ((capacity / 4096) / 8));
+
+ blk->capacity = capacity;
+
+ blk->blk_base_addr = (addr_t)V3_AllocPages(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);
+
+ if (v3_attach_device(vm, dev) == -1) {
+ PrintError("Could not attach device %s\n", name);
+ 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"));
+ return -1;
+ }
+
+
+ return 0;
+}
+
+device_register("TMPDISK", blk_init)
