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[Qemu-devel] [PATCH v2] slirp: fix packet requeue issue in batchq
From: |
zwu . kernel |
Subject: |
[Qemu-devel] [PATCH v2] slirp: fix packet requeue issue in batchq |
Date: |
Thu, 16 Feb 2012 16:07:14 +0800 |
From: Zhi Yong Wu <address@hidden>
Signed-off-by: Zhi Yong Wu <address@hidden>
---
slirp/if.c | 19 +++++++++++++++++--
slirp/mbuf.c | 3 +--
2 files changed, 18 insertions(+), 4 deletions(-)
diff --git a/slirp/if.c b/slirp/if.c
index 8e0cac2..57350d5 100644
--- a/slirp/if.c
+++ b/slirp/if.c
@@ -22,6 +22,7 @@ ifs_remque(struct mbuf *ifm)
{
ifm->ifs_prev->ifs_next = ifm->ifs_next;
ifm->ifs_next->ifs_prev = ifm->ifs_prev;
+ ifs_init(ifm);
}
void
@@ -154,7 +155,7 @@ if_start(Slirp *slirp)
{
uint64_t now = qemu_get_clock_ns(rt_clock);
int requeued = 0;
- struct mbuf *ifm, *ifqt;
+ struct mbuf *ifm, *ifqt, *ifm_next;
DEBUG_CALL("if_start");
@@ -162,6 +163,8 @@ if_start(Slirp *slirp)
return; /* Nothing to do */
again:
+ ifm_next = NULL;
+
/* check if we can really output */
if (!slirp_can_output(slirp->opaque))
return;
@@ -190,6 +193,7 @@ if_start(Slirp *slirp)
/* If there are more packets for this session, re-queue them */
if (ifm->ifs_next != /* ifm->ifs_prev != */ ifm) {
insque(ifm->ifs_next, ifqt);
+ ifm_next = ifm->ifs_next;
ifs_remque(ifm);
}
@@ -209,7 +213,18 @@ if_start(Slirp *slirp)
m_free(ifm);
} else {
/* re-queue */
- insque(ifm, ifqt);
+ if (ifm_next) {
+ /*restore the original state of batchq*/
+ remque(ifm_next);
+ insque(ifm, ifqt);
+ ifm_next->ifs_prev->ifs_next = ifm;
+ ifm->ifs_prev = ifm_next->ifs_prev;
+ ifm->ifs_next = ifm_next;
+ ifm_next->ifs_prev = ifm;
+ } else {
+ insque(ifm, ifqt);
+ }
+
requeued++;
}
}
diff --git a/slirp/mbuf.c b/slirp/mbuf.c
index c699c75..f429c0a 100644
--- a/slirp/mbuf.c
+++ b/slirp/mbuf.c
@@ -68,8 +68,7 @@ m_get(Slirp *slirp)
m->m_size = SLIRP_MSIZE - offsetof(struct mbuf, m_dat);
m->m_data = m->m_dat;
m->m_len = 0;
- m->m_nextpkt = NULL;
- m->m_prevpkt = NULL;
+ ifs_init(m);
m->arp_requested = false;
m->expiration_date = (uint64_t)-1;
end_error:
--
1.7.6
- [Qemu-devel] [PATCH v2] slirp: fix packet requeue issue in batchq,
zwu . kernel <=