slirp: add clock_get_ns() callback

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>

net/slirp.c

@@ -146,9 +146,15 @@ static void net_slirp_guest_error(const char *msg)
     qemu_log_mask(LOG_GUEST_ERROR, "%s", msg);
 }
 
+static int64_t net_slirp_clock_get_ns(void)
+{
+    return qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
+}
+
 static const SlirpCb slirp_cb = {
     .output = net_slirp_output,
     .guest_error = net_slirp_guest_error,
+    .clock_get_ns = net_slirp_clock_get_ns,
 };
 
 static int net_slirp_init(NetClientState *peer, const char *model,

slirp/if.c

@@ -148,7 +148,7 @@ diddit:
  */
 void if_start(Slirp *slirp)
 {
-    uint64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
+    uint64_t now = slirp->cb->clock_get_ns();
     bool from_batchq = false;
     struct mbuf *ifm, *ifm_next, *ifqt;
 

slirp/ip6_icmp.c

@@ -17,7 +17,7 @@ static void ra_timer_handler(void *opaque)
 {
     Slirp *slirp = opaque;
     timer_mod(slirp->ra_timer,
-              qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + NDP_Interval);
+              slirp->cb->clock_get_ns() / SCALE_MS + NDP_Interval);
     ndp_send_ra(slirp);
 }
 
@@ -31,7 +31,7 @@ void icmp6_init(Slirp *slirp)
                                      SCALE_MS, QEMU_TIMER_ATTR_EXTERNAL,
                                      ra_timer_handler, slirp);
     timer_mod(slirp->ra_timer,
-              qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + NDP_Interval);
+              slirp->cb->clock_get_ns() / SCALE_MS + NDP_Interval);
 }
 
 void icmp6_cleanup(Slirp *slirp)

slirp/libslirp.h

@@ -15,6 +15,8 @@ typedef struct SlirpCb {
     void (*output)(void *opaque, const uint8_t *pkt, int pkt_len);
     /* Print a message for an error due to guest misbehavior.  */
     void (*guest_error)(const char *msg);
+    /* Return the virtual clock value in nanoseconds */
+    int64_t (*clock_get_ns)(void);
 } SlirpCb;
 
 

slirp/slirp.c

@@ -581,15 +581,15 @@ void slirp_pollfds_fill(GArray *pollfds, uint32_t *timeout)
 
 void slirp_pollfds_poll(GArray *pollfds, int select_error)
 {
-    Slirp *slirp;
+    Slirp *slirp = QTAILQ_FIRST(&slirp_instances);
     struct socket *so, *so_next;
     int ret;
 
-    if (QTAILQ_EMPTY(&slirp_instances)) {
+    if (!slirp) {
         return;
     }
 
-    curtime = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL);
+    curtime = slirp->cb->clock_get_ns() / SCALE_MS;
 
     QTAILQ_FOREACH(slirp, &slirp_instances, entry) {
         /*
@@ -916,8 +916,7 @@ static int if_encap4(Slirp *slirp, struct mbuf *ifm, struct ethhdr *eh,
             ifm->resolution_requested = true;
 
             /* Expire request and drop outgoing packet after 1 second */
-            ifm->expiration_date =
-                qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + 1000000000ULL;
+            ifm->expiration_date = slirp->cb->clock_get_ns() + 1000000000ULL;
         }
         return 0;
     } else {
@@ -943,8 +942,7 @@ static int if_encap6(Slirp *slirp, struct mbuf *ifm, struct ethhdr *eh,
         if (!ifm->resolution_requested) {
             ndp_send_ns(slirp, ip6h->ip_dst);
             ifm->resolution_requested = true;
-            ifm->expiration_date =
-                qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + 1000000000ULL;
+            ifm->expiration_date = slirp->cb->clock_get_ns() + 1000000000ULL;
         }
         return 0;
     } else {