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Add support for vmchannel socket migration (Gleb Natapov)

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Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>



git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6243 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
aliguori 2009-01-08 19:27:07 +00:00
parent 49ec9b4054
commit 062e55272e
1 changed files with 227 additions and 0 deletions
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227
slirp/slirp.c
View file

@ -23,6 +23,7 @@
*/
#include "qemu-common.h"
#include "slirp.h"
#include "hw/hw.h"
/* host address */
struct in_addr our_addr;
@ -166,6 +167,9 @@ static void slirp_cleanup(void)
}
#endif
static void slirp_state_save(QEMUFile *f, void *opaque);
static int slirp_state_load(QEMUFile *f, void *opaque, int version_id);
void slirp_init(int restrict, char *special_ip)
{
// debug_init("/tmp/slirp.log", DEBUG_DEFAULT);
@ -201,6 +205,7 @@ void slirp_init(int restrict, char *special_ip)
inet_aton(slirp_special_ip, &special_addr);
alias_addr.s_addr = special_addr.s_addr | htonl(CTL_ALIAS);
getouraddr();
register_savevm("slirp", 0, 1, slirp_state_save, slirp_state_load, NULL);
}
#define CONN_CANFSEND(so) (((so)->so_state & (SS_FCANTSENDMORE|SS_ISFCONNECTED)) == SS_ISFCONNECTED)
@ -809,3 +814,225 @@ void slirp_socket_recv(int addr_low_byte, int guest_port, const uint8_t *buf,
if (ret > 0)
tcp_output(sototcpcb(so));
}
static void slirp_tcp_save(QEMUFile *f, struct tcpcb *tp)
{
int i;
qemu_put_sbe16(f, tp->t_state);
for (i = 0; i < TCPT_NTIMERS; i++)
qemu_put_sbe16(f, tp->t_timer[i]);
qemu_put_sbe16(f, tp->t_rxtshift);
qemu_put_sbe16(f, tp->t_rxtcur);
qemu_put_sbe16(f, tp->t_dupacks);
qemu_put_be16(f, tp->t_maxseg);
qemu_put_sbyte(f, tp->t_force);
qemu_put_be16(f, tp->t_flags);
qemu_put_be32(f, tp->snd_una);
qemu_put_be32(f, tp->snd_nxt);
qemu_put_be32(f, tp->snd_up);
qemu_put_be32(f, tp->snd_wl1);
qemu_put_be32(f, tp->snd_wl2);
qemu_put_be32(f, tp->iss);
qemu_put_be32(f, tp->snd_wnd);
qemu_put_be32(f, tp->rcv_wnd);
qemu_put_be32(f, tp->rcv_nxt);
qemu_put_be32(f, tp->rcv_up);
qemu_put_be32(f, tp->irs);
qemu_put_be32(f, tp->rcv_adv);
qemu_put_be32(f, tp->snd_max);
qemu_put_be32(f, tp->snd_cwnd);
qemu_put_be32(f, tp->snd_ssthresh);
qemu_put_sbe16(f, tp->t_idle);
qemu_put_sbe16(f, tp->t_rtt);
qemu_put_be32(f, tp->t_rtseq);
qemu_put_sbe16(f, tp->t_srtt);
qemu_put_sbe16(f, tp->t_rttvar);
qemu_put_be16(f, tp->t_rttmin);
qemu_put_be32(f, tp->max_sndwnd);
qemu_put_byte(f, tp->t_oobflags);
qemu_put_byte(f, tp->t_iobc);
qemu_put_sbe16(f, tp->t_softerror);
qemu_put_byte(f, tp->snd_scale);
qemu_put_byte(f, tp->rcv_scale);
qemu_put_byte(f, tp->request_r_scale);
qemu_put_byte(f, tp->requested_s_scale);
qemu_put_be32(f, tp->ts_recent);
qemu_put_be32(f, tp->ts_recent_age);
qemu_put_be32(f, tp->last_ack_sent);
}
static void slirp_sbuf_save(QEMUFile *f, struct sbuf *sbuf)
{
uint32_t off;
qemu_put_be32(f, sbuf->sb_cc);
qemu_put_be32(f, sbuf->sb_datalen);
off = (uint32_t)(sbuf->sb_wptr - sbuf->sb_data);
qemu_put_sbe32(f, off);
off = (uint32_t)(sbuf->sb_rptr - sbuf->sb_data);
qemu_put_sbe32(f, off);
qemu_put_buffer(f, (unsigned char*)sbuf->sb_data, sbuf->sb_datalen);
}
static void slirp_socket_save(QEMUFile *f, struct socket *so)
{
qemu_put_be32(f, so->so_urgc);
qemu_put_be32(f, so->so_faddr.s_addr);
qemu_put_be32(f, so->so_laddr.s_addr);
qemu_put_be16(f, so->so_fport);
qemu_put_be16(f, so->so_lport);
qemu_put_byte(f, so->so_iptos);
qemu_put_byte(f, so->so_emu);
qemu_put_byte(f, so->so_type);
qemu_put_be32(f, so->so_state);
slirp_sbuf_save(f, &so->so_rcv);
slirp_sbuf_save(f, &so->so_snd);
slirp_tcp_save(f, so->so_tcpcb);
}
static void slirp_state_save(QEMUFile *f, void *opaque)
{
struct ex_list *ex_ptr;
for (ex_ptr = exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next)
if (ex_ptr->ex_pty == 3) {
struct socket *so;
so = slirp_find_ctl_socket(ex_ptr->ex_addr, ntohs(ex_ptr->ex_fport));
if (!so)
continue;
qemu_put_byte(f, 42);
slirp_socket_save(f, so);
}
qemu_put_byte(f, 0);
}
static void slirp_tcp_load(QEMUFile *f, struct tcpcb *tp)
{
int i;
tp->t_state = qemu_get_sbe16(f);
for (i = 0; i < TCPT_NTIMERS; i++)
tp->t_timer[i] = qemu_get_sbe16(f);
tp->t_rxtshift = qemu_get_sbe16(f);
tp->t_rxtcur = qemu_get_sbe16(f);
tp->t_dupacks = qemu_get_sbe16(f);
tp->t_maxseg = qemu_get_be16(f);
tp->t_force = qemu_get_sbyte(f);
tp->t_flags = qemu_get_be16(f);
tp->snd_una = qemu_get_be32(f);
tp->snd_nxt = qemu_get_be32(f);
tp->snd_up = qemu_get_be32(f);
tp->snd_wl1 = qemu_get_be32(f);
tp->snd_wl2 = qemu_get_be32(f);
tp->iss = qemu_get_be32(f);
tp->snd_wnd = qemu_get_be32(f);
tp->rcv_wnd = qemu_get_be32(f);
tp->rcv_nxt = qemu_get_be32(f);
tp->rcv_up = qemu_get_be32(f);
tp->irs = qemu_get_be32(f);
tp->rcv_adv = qemu_get_be32(f);
tp->snd_max = qemu_get_be32(f);
tp->snd_cwnd = qemu_get_be32(f);
tp->snd_ssthresh = qemu_get_be32(f);
tp->t_idle = qemu_get_sbe16(f);
tp->t_rtt = qemu_get_sbe16(f);
tp->t_rtseq = qemu_get_be32(f);
tp->t_srtt = qemu_get_sbe16(f);
tp->t_rttvar = qemu_get_sbe16(f);
tp->t_rttmin = qemu_get_be16(f);
tp->max_sndwnd = qemu_get_be32(f);
tp->t_oobflags = qemu_get_byte(f);
tp->t_iobc = qemu_get_byte(f);
tp->t_softerror = qemu_get_sbe16(f);
tp->snd_scale = qemu_get_byte(f);
tp->rcv_scale = qemu_get_byte(f);
tp->request_r_scale = qemu_get_byte(f);
tp->requested_s_scale = qemu_get_byte(f);
tp->ts_recent = qemu_get_be32(f);
tp->ts_recent_age = qemu_get_be32(f);
tp->last_ack_sent = qemu_get_be32(f);
tcp_template(tp);
}
static int slirp_sbuf_load(QEMUFile *f, struct sbuf *sbuf)
{
uint32_t off, sb_cc, sb_datalen;
sb_cc = qemu_get_be32(f);
sb_datalen = qemu_get_be32(f);
sbreserve(sbuf, sb_datalen);
if (sbuf->sb_datalen != sb_datalen)
return -ENOMEM;
sbuf->sb_cc = sb_cc;
off = qemu_get_sbe32(f);
sbuf->sb_wptr = sbuf->sb_data + off;
off = qemu_get_sbe32(f);
sbuf->sb_rptr = sbuf->sb_data + off;
qemu_get_buffer(f, (unsigned char*)sbuf->sb_data, sbuf->sb_datalen);
return 0;
}
static int slirp_socket_load(QEMUFile *f, struct socket *so)
{
if (tcp_attach(so) < 0)
return -ENOMEM;
so->so_urgc = qemu_get_be32(f);
so->so_faddr.s_addr = qemu_get_be32(f);
so->so_laddr.s_addr = qemu_get_be32(f);
so->so_fport = qemu_get_be16(f);
so->so_lport = qemu_get_be16(f);
so->so_iptos = qemu_get_byte(f);
so->so_emu = qemu_get_byte(f);
so->so_type = qemu_get_byte(f);
so->so_state = qemu_get_be32(f);
if (slirp_sbuf_load(f, &so->so_rcv) < 0)
return -ENOMEM;
if (slirp_sbuf_load(f, &so->so_snd) < 0)
return -ENOMEM;
slirp_tcp_load(f, so->so_tcpcb);
return 0;
}
static int slirp_state_load(QEMUFile *f, void *opaque, int version_id)
{
struct ex_list *ex_ptr;
int r;
while ((r = qemu_get_byte(f))) {
int ret;
struct socket *so = socreate();
if (!so)
return -ENOMEM;
ret = slirp_socket_load(f, so);
if (ret < 0)
return ret;
if ((so->so_faddr.s_addr & htonl(0xffffff00)) != special_addr.s_addr)
return -EINVAL;
for (ex_ptr = exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next)
if (ex_ptr->ex_pty == 3 &&
(ntohl(so->so_faddr.s_addr) & 0xff) == ex_ptr->ex_addr &&
so->so_fport == ex_ptr->ex_fport)
break;
if (!ex_ptr)
return -EINVAL;
so->extra = ex_ptr->ex_exec;
}
return 0;
}