2 * This file is part of the Palacios Virtual Machine Monitor developed
3 * by the V3VEE Project with funding from the United States National
4 * Science Foundation and the Department of Energy.
6 * The V3VEE Project is a joint project between Northwestern University
7 * and the University of New Mexico. You can find out more at
10 * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
11 * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
12 * All rights reserved.
14 * Author: Jack Lange <jarusl@cs.northwestern.edu>
16 * This is free software. You are permitted to use,
17 * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
20 #include <palacios/vmm.h>
21 #include <palacios/vmm_dev_mgr.h>
22 #include <palacios/vmm_socket.h>
24 #ifndef CONFIG_DEBUG_IDE
26 #define PrintDebug(fmt, args...)
30 #define NBD_READ_CMD 0x1
31 #define NBD_WRITE_CMD 0x2
32 #define NBD_CAPACITY_CMD 0x3
34 #define NBD_STATUS_OK 0x00
35 #define NBD_STATUS_ERR 0xff
39 uint64_t capacity; // in bytes
51 static int send_all(int socket, char * buf, int length) {
54 PrintDebug("Sending %d bytes\n", length - bytes_sent);
55 while (bytes_sent < length) {
56 int tmp_bytes = V3_Send(socket, buf + bytes_sent, length - bytes_sent);
57 PrintDebug("Sent %d bytes\n", tmp_bytes);
60 PrintError("Connection Closed unexpectedly\n");
64 bytes_sent += tmp_bytes;
71 static int recv_all(int socket, char * buf, int length) {
74 PrintDebug("Reading %d bytes\n", length - bytes_read);
75 while (bytes_read < length) {
76 int tmp_bytes = V3_Recv(socket, buf + bytes_read, length - bytes_read);
77 PrintDebug("Received %d bytes\n", tmp_bytes);
80 PrintError("Connection Closed unexpectedly\n");
84 bytes_read += tmp_bytes;
91 // HDs always read 512 byte blocks... ?
92 static int read(uint8_t * buf, uint64_t lba, uint64_t num_bytes, void * private_data) {
93 struct disk_state * disk = (struct disk_state *)private_data ;
96 char nbd_cmd[4] = {0,0,0,0};
97 uint64_t offset = lba;
98 uint64_t length = num_bytes;
100 nbd_cmd[0] = NBD_READ_CMD;
102 if (send_all(disk->socket, nbd_cmd, 4) == -1) {
103 PrintError("Error sending read command\n");
107 if (send_all(disk->socket, (char *)&offset, 8) == -1) {
108 PrintError("Error sending read offset\n");
112 if (send_all(disk->socket, (char *)&length, 4) == -1) {
113 PrintError("Error sending read length\n");
117 if (recv_all(disk->socket, (char *)&status, 1) == -1) {
118 PrintError("Error receiving status\n");
122 if (status != NBD_STATUS_OK) {
123 PrintError("NBD Error....\n");
127 PrintDebug("Reading Data Ret Length\n");
129 if (recv_all(disk->socket, (char *)&ret_len, 4) == -1) {
130 PrintError("Error receiving Return read length\n");
134 if (ret_len != length) {
135 PrintError("Read length mismatch (req=%llu) (result=%u)\n", length, ret_len);
139 PrintDebug("Reading Data (%d bytes)\n", ret_len);
141 if (recv_all(disk->socket, (char *)buf, ret_len) == -1) {
142 PrintError("Read Data Error\n");
150 static int write(uint8_t * buf, uint64_t lba, uint64_t num_bytes, void * private_data) {
151 struct disk_state * disk = (struct disk_state *)private_data ;
152 uint64_t offset = lba;
153 int length = num_bytes;
155 char nbd_cmd[4] = {0,0,0,0};
157 nbd_cmd[0] = NBD_WRITE_CMD;
159 if (send_all(disk->socket, nbd_cmd, 4) == -1) {
160 PrintError("Error sending write command\n");
164 if (send_all(disk->socket, (char *)&offset, 8) == -1) {
165 PrintError("Error sending write offset\n");
169 if (send_all(disk->socket, (char *)&length, 4) == -1) {
170 PrintError("Error sending write length\n");
174 PrintDebug("Writing Data (%d bytes)\n", length);
176 if (send_all(disk->socket, (char *)buf, length) == -1) {
177 PrintError("Write Data Error\n");
181 if (recv_all(disk->socket, (char *)&status, 1) == -1) {
182 PrintError("Error receiving status\n");
186 if (status != NBD_STATUS_OK) {
187 PrintError("NBD Error....\n");
195 static uint64_t get_capacity(void * private_data) {
196 struct disk_state * disk = (struct disk_state *)private_data;
198 return disk->capacity;
201 static struct v3_dev_blk_ops blk_ops = {
204 .get_capacity = get_capacity,
211 static int disk_free(struct vm_device * dev) {
215 static struct v3_device_ops dev_ops = {
223 static int socket_init(struct disk_state * disk) {
226 PrintDebug("Intializing Net Disk\n");
228 disk->socket = V3_Create_TCP_Socket();
230 PrintDebug("DISK socket: %d\n", disk->socket);
231 PrintDebug("Connecting to: %s:%d\n", v3_inet_ntoa(disk->ip_addr), disk->port);
233 V3_Connect_To_IP(disk->socket, v3_ntohl(disk->ip_addr), disk->port);
235 PrintDebug("Connected to NBD server\n");
237 //snprintf(header, 64, "V3_NBD_1 %s\n", cd->disk_name);
238 strcpy(header, "V3_NBD_1 ");
239 strncat(header, disk->disk_name, 32);
240 strncat(header, "\n", 1);
243 if (send_all(disk->socket, header, strlen(header)) == -1) {
244 PrintError("Error connecting to Network Block Device: %s\n", disk->disk_name);
248 // store local copy of capacity
250 char nbd_cmd[4] = {0,0,0,0};
252 nbd_cmd[0] = NBD_CAPACITY_CMD;
254 if (send_all(disk->socket, nbd_cmd, 4) == -1) {
255 PrintError("Error sending capacity command\n");
259 if (recv_all(disk->socket, (char *)&(disk->capacity), 8) == -1) {
260 PrintError("Error Receiving Capacity\n");
264 PrintDebug("Capacity: %p\n", (void *)(disk->capacity));
273 static int disk_init(struct guest_info * vm, v3_cfg_tree_t * cfg) {
274 struct disk_state * disk = (struct disk_state *)V3_Malloc(sizeof(struct disk_state));
276 char * ip_str = v3_cfg_val(cfg, "IP");
277 char * port_str = v3_cfg_val(cfg, "port");
278 char * disk_tag = v3_cfg_val(cfg, "tag");
279 char * name = v3_cfg_val(cfg, "name");
281 v3_cfg_tree_t * frontend_cfg = v3_cfg_subtree(cfg, "frontend");
283 PrintDebug("Registering Net disk at %s:%s disk=%s\n", ip_str, port_str, disk_tag);
285 strncpy(disk->disk_name, disk_tag, sizeof(disk->disk_name));
286 disk->ip_addr = v3_inet_addr(ip_str);
287 disk->port = atoi(port_str);
289 struct vm_device * dev = v3_allocate_device(name, &dev_ops, disk);
291 if (v3_attach_device(vm, dev) == -1) {
292 PrintError("Could not attach device %s\n", name);
296 if (socket_init(disk) == -1) {
297 PrintError("could not initialize network connection\n");
301 PrintDebug("Registering Disk\n");
303 if (v3_dev_connect_blk(vm, v3_cfg_val(frontend_cfg, "tag"),
304 &blk_ops, frontend_cfg, disk) == -1) {
305 PrintError("Could not connect %s to frontend\n", name);
309 PrintDebug("intialization done\n");
315 device_register("NETDISK", disk_init)