*/
#include <palacios/vmm.h>
-#include <devices/ram_cd.h>
+#include <devices/net_cd.h>
#include <devices/ide.h>
+#include <palacios/vmm_socket.h>
-#ifndef DEBUG_IDE
-#undef PrintDebug
-#define PrintDebug(fmt, args...)
-#endif
+/* #ifndef DEBUG_IDE */
+/* #undef PrintDebug */
+/* #define PrintDebug(fmt, args...) */
+/* #endif */
+
+#define NBD_READ_CMD 0x1
+#define NBD_WRITE_CMD 0x2
+#define NBD_CAPACITY_CMD 0x3
+
+
+
+#define NBD_STATUS_OK 0x00
+#define NBD_STATUS_ERR 0xff
+
struct cd_state {
- addr_t disk_image;
- uint32_t capacity; // in bytes
+ uint64_t capacity; // in bytes
+
+ int socket;
+
+ uint32_t ip_addr;
+ uint16_t port;
+
+ char disk_name[32];
struct vm_device * ide;
};
+static int send_all(int socket, char * buf, int length) {
+ int bytes_sent = 0;
+
+ while (bytes_sent < length) {
+ PrintDebug("Sending %d bytes\n", length - bytes_sent);
+ int tmp_bytes = V3_Send(socket, buf + bytes_sent, length - bytes_sent);
+ PrintDebug("Sent %d bytes\n", tmp_bytes);
+
+ if (tmp_bytes == 0) {
+ return -1;
+ }
+
+ bytes_sent += tmp_bytes;
+ }
+
+ return 0;
+}
+
+
+static int recv_all(int socket, char * buf, int length) {
+ int bytes_read = 0;
+
+ while (bytes_read < length) {
+ PrintDebug("Reading %d bytes\n", length - bytes_read);
+ int tmp_bytes = V3_Recv(socket, buf + bytes_read, length - bytes_read);
+ PrintDebug("Received %d bytes\n", tmp_bytes);
+
+ if (tmp_bytes == 0) {
+ return -1;
+ }
+
+ bytes_read += tmp_bytes;
+ }
+
+ return 0;
+}
+
// CDs always read 2048 byte blocks... ?
static int cd_read(uint8_t * buf, int block_count, uint64_t lba, void * private_data) {
struct vm_device * cd_dev = (struct vm_device *)private_data;
struct cd_state * cd = (struct cd_state *)(cd_dev->private_data);
- int offset = lba * ATAPI_BLOCK_SIZE;
+ uint64_t offset = lba * ATAPI_BLOCK_SIZE;
int length = block_count * ATAPI_BLOCK_SIZE;
+ uint8_t status;
+ uint32_t ret_len = 0;
+ char nbd_cmd[4] = {0,0,0,0};
+
+ nbd_cmd[0] = NBD_READ_CMD;
+
+ if (send_all(cd->socket, nbd_cmd, 4) == -1) {
+ PrintError("Error sending capacity command\n");
+ return -1;
+ }
+
+ if (send_all(cd->socket, (char *)&offset, 8) == -1) {
+ PrintError("Error sending read offset\n");
+ return -1;
+ }
+
+ if (send_all(cd->socket, (char *)&length, 4) == -1) {
+ PrintError("Error sending read length\n");
+ return -1;
+ }
+
+ if (recv_all(cd->socket, (char *)&status, 1) == -1) {
+ PrintError("Error receiving status\n");
+ return -1;
+ }
+
+ if (status != NBD_STATUS_OK) {
+ PrintError("NBD Error....\n");
+ return -1;
+ }
+
+ PrintDebug("Reading Data Ret Length\n");
- PrintDebug("Reading RAM CD at (LBA=%d) offset %d (length=%d)\n", (uint32_t)lba, offset, length);
+ if (recv_all(cd->socket, (char *)&ret_len, 4) == -1) {
+ PrintError("Error receiving Return read length\n");
+ return -1;
+ }
+
+ if (ret_len != length) {
+ PrintError("Read length mismatch (req=%d) (result=%d)\n", length, ret_len);
+ return -1;
+ }
- memcpy(buf, (uint8_t *)(cd->disk_image + offset), length);
+ PrintDebug("Reading Data\n");
+ if (recv_all(cd->socket, (char *)buf, ret_len) == -1) {
+ PrintError("Read Data Error\n");
+ return -1;
+ }
+
return 0;
}
static uint32_t cd_get_capacity(void * private_data) {
struct vm_device * cd_dev = (struct vm_device *)private_data;
struct cd_state * cd = (struct cd_state *)(cd_dev->private_data);
- PrintDebug("Querying RAM CD capacity (bytes=%d) (ret = %d)\n",
- cd->capacity, cd->capacity / ATAPI_BLOCK_SIZE);
+
return cd->capacity / ATAPI_BLOCK_SIZE;
}
static int cd_init(struct vm_device * dev) {
struct cd_state * cd = (struct cd_state *)(dev->private_data);
+ char header[64];
+
+ PrintDebug("Intializing Net CD\n");
+
+ cd->socket = V3_Create_TCP_Socket();
+
+ PrintDebug("CD socket: %d\n", cd->socket);
+ PrintDebug("Connecting to: %s:%d\n", v3_inet_ntoa(cd->ip_addr), cd->port);
+
+ V3_Connect_To_IP(cd->socket, v3_ntohl(cd->ip_addr), cd->port);
+
- if (v3_ide_register_cdrom(cd->ide, cd->bus, cd->drive, "RAM-CD", &cd_ops, dev) == -1) {
+ PrintDebug("Connected to NBD server\n");
+
+ //snprintf(header, 64, "V3_NBD_1 %s\n", cd->disk_name);
+ strcpy(header, "V3_NBD_1 ");
+ strncat(header, cd->disk_name, 32);
+ strncat(header, "\n", 1);
+
+
+ if (send_all(cd->socket, header, strlen(header)) == -1) {
+ PrintError("Error connecting to Network Block Device: %s\n", cd->disk_name);
+ return -1;
+ }
+
+ // Cache Capacity
+ {
+ char nbd_cmd[4] = {0,0,0,0};
+
+ nbd_cmd[0] = NBD_CAPACITY_CMD;
+
+ if (send_all(cd->socket, nbd_cmd, 4) == -1) {
+ PrintError("Error sending capacity command\n");
+ return -1;
+ }
+
+ if (recv_all(cd->socket, (char *)&(cd->capacity), 8) == -1) {
+ PrintError("Error Receiving Capacity\n");
+ return -1;
+ }
+
+ PrintDebug("Capacity: %p\n", (void *)(cd->capacity));
+ }
+
+
+ PrintDebug("Registering CD\n");
+
+ if (v3_ide_register_cdrom(cd->ide, cd->bus, cd->drive, "NET-CD", &cd_ops, dev) == -1) {
return -1;
}
+
+ PrintDebug("intialization done\n");
return 0;
}
.stop = NULL,
};
-struct vm_device * v3_create_ram_cd(struct vm_device * ide,
+struct vm_device * v3_create_net_cd(struct vm_device * ide,
uint_t bus, uint_t drive,
- addr_t ramdisk, uint32_t size) {
- struct cd_state * cd = NULL;
-
- if (size % ATAPI_BLOCK_SIZE) {
- PrintError("CD image must be an integral of block size (ATAPI_BLOCK_SIZE=%d)\n", ATAPI_BLOCK_SIZE);
- return NULL;
- }
-
- cd = (struct cd_state *)V3_Malloc(sizeof(struct cd_state));
+ const char * ip_str, uint16_t port,
+ const char * disk_tag) {
+ struct cd_state * cd = (struct cd_state *)V3_Malloc(sizeof(struct cd_state));
- PrintDebug("Registering Ram CD at %p (size=%d)\n", (void *)ramdisk, size);
+ PrintDebug("Registering Net CD at %s:%d disk=%s\n", ip_str, port, disk_tag);
-
- cd->disk_image = ramdisk;
- cd->capacity = size;
+ strncpy(cd->disk_name, disk_tag, sizeof(cd->disk_name));
+ cd->ip_addr = v3_inet_addr(ip_str);
+ cd->port = port;
cd->ide = ide;
cd->bus = bus;
cd->drive = drive;
- struct vm_device * cd_dev = v3_create_device("RAM-CD", &dev_ops, cd);
+ struct vm_device * cd_dev = v3_create_device("NET-CD", &dev_ops, cd);
return cd_dev;
}
