/*
* Handle an I/O request.
*/
static void operar_sector(struct sbd_device *dev, unsigned long offset, unsigned long nbytes, char *buffer, int op) {
int len;
struct sckReq pack;
if ((offset + nbytes) > dev->size) {
printk (KERN_NOTICE "sbd: Overflow de escritura (%ld %ld)\n", offset, nbytes);
return;
}
pack.op = op;
pack.offset = offset;
pack.nbytes = nbytes;
printk (KERN_NOTICE "sbd: Operacion: %d - Off: %ld - Size: %ld\n", op, offset, nbytes);
if (op) {
// ESCRITURA.
payload = kmalloc(sizeof(struct sckReq) + nbytes, GFP_KERNEL);
memcpy(payload, &pack, sizeof(struct sckReq));
memcpy(payload + sizeof(struct sckReq), buffer, nbytes);
len = send_sync_buf(clientsocket, payload, sizeof(struct sckReq) + nbytes, 0);
len = recv_sync_buf(clientsocket, (void*)&pack, sizeof(struct sckReq), 0);
if (pack.op == 2) {
printk (KERN_NOTICE "sbd: Grabe correctamente %ld bytes\n", nbytes);
}
kfree(payload);
} else {
// LECTURA.
len = send_sync_buf(clientsocket, (void*)&pack, sizeof(struct sckReq), 0);
len = recv_sync_buf(clientsocket, buffer, nbytes, 0);
printk (KERN_NOTICE "sbd: Lei correctamente %ld bytes\n", nbytes);
}
}
static void send_reply(struct socket *sock, char *str)
{
send_sync_buf(sock, str, strlen(str),
MSG_DONTWAIT);
}
void send_string(struct socket *sock, char *str)
{
send_sync_buf(sock, (void*)str, strlen(str), 0);
}