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slirp: set mainloop timeout with more precise value

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If slirp needs to emulate tcp timeout, then the timeout value
for mainloop should be more precise, which is determined by
slirp's fasttimo or slowtimo. Achieve this by swap the logic
sequence of slirp_pollfds_fill and slirp_update_timeout.

Signed-off-by: Liu Ping Fan <pingfank@linux.vnet.ibm.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
This commit is contained in:
Liu Ping Fan 2013-08-25 10:01:21 +08:00 committed by Jan Kiszka
parent 9b0ca6cc64
commit a42e9c4188
4 changed files with 27 additions and 13 deletions
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3
main-loop.c
View File

@ -466,8 +466,7 @@ int main_loop_wait(int nonblocking)
g_array_set_size(gpollfds, 0); /* reset for new iteration */
/* XXX: separate device handlers from system ones */
#ifdef CONFIG_SLIRP
slirp_update_timeout(&timeout);
slirp_pollfds_fill(gpollfds);
slirp_pollfds_fill(gpollfds, &timeout);
#endif
qemu_iohandler_fill(gpollfds);

3
slirp/libslirp.h
View File

@ -16,8 +16,7 @@ Slirp *slirp_init(int restricted, struct in_addr vnetwork,
void *opaque);
void slirp_cleanup(Slirp *slirp);
void slirp_update_timeout(uint32_t *timeout);
void slirp_pollfds_fill(GArray *pollfds);
void slirp_pollfds_fill(GArray *pollfds, uint32_t *timeout);
void slirp_pollfds_poll(GArray *pollfds, int select_error);

28
slirp/slirp.c
View File

@ -262,14 +262,33 @@ void slirp_cleanup(Slirp *slirp)
#define CONN_CANFSEND(so) (((so)->so_state & (SS_FCANTSENDMORE|SS_ISFCONNECTED)) == SS_ISFCONNECTED)
#define CONN_CANFRCV(so) (((so)->so_state & (SS_FCANTRCVMORE|SS_ISFCONNECTED)) == SS_ISFCONNECTED)
void slirp_update_timeout(uint32_t *timeout)
static void slirp_update_timeout(uint32_t *timeout)
{
if (!QTAILQ_EMPTY(&slirp_instances)) {
*timeout = MIN(TIMEOUT_DEFAULT, *timeout);
Slirp *slirp;
uint32_t t;
if (*timeout <= TIMEOUT_FAST) {
return;
}
*timeout = MIN(1000, *timeout);
t = *timeout;
/* If we have tcp timeout with slirp, then we will fill @timeout with
* more precise value.
*/
QTAILQ_FOREACH(slirp, &slirp_instances, entry) {
if (slirp->time_fasttimo) {
*timeout = TIMEOUT_FAST;
return;
}
if (slirp->do_slowtimo) {
t = MIN(TIMEOUT_SLOW, t);
}
}
*timeout = t;
}
void slirp_pollfds_fill(GArray *pollfds)
void slirp_pollfds_fill(GArray *pollfds, uint32_t *timeout)
{
Slirp *slirp;
struct socket *so, *so_next;
@ -439,6 +458,7 @@ void slirp_pollfds_fill(GArray *pollfds)
}
}
}
slirp_update_timeout(timeout);
}
void slirp_pollfds_poll(GArray *pollfds, int select_error)

6
stubs/slirp.c
View File

@ -1,11 +1,7 @@
#include "qemu-common.h"
#include "slirp/slirp.h"
void slirp_update_timeout(uint32_t *timeout)
{
}
void slirp_pollfds_fill(GArray *pollfds)
void slirp_pollfds_fill(GArray *pollfds, uint32_t *timeout)
{
}