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MFC r204143:

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Upon virtual network stack teardown properly release the TCP syncache
  resources.

  Reviewed by:  rwatson
This commit is contained in:
Bjoern A. Zeeb 2010-03-27 17:36:52 +00:00
parent e47658ce90
commit 1198bd71ba
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/stable/8/; revision=205755
1 changed files with 24 additions and 2 deletions
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26
sys/netinet/tcp_syncache.c
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@ -278,11 +278,33 @@ syncache_init(void)
void
syncache_destroy(void)
{
struct syncache_head *sch;
struct syncache *sc, *nsc;
int i;
/* XXX walk the cache, free remaining objects, stop timers */
/* Cleanup hash buckets: stop timers, free entries, destroy locks. */
for (i = 0; i < V_tcp_syncache.hashsize; i++) {
sch = &V_tcp_syncache.hashbase[i];
callout_drain(&sch->sch_timer);
SCH_LOCK(sch);
TAILQ_FOREACH_SAFE(sc, &sch->sch_bucket, sc_hash, nsc)
syncache_drop(sc, sch);
SCH_UNLOCK(sch);
KASSERT(TAILQ_EMPTY(&sch->sch_bucket),
("%s: sch->sch_bucket not empty", __func__));
KASSERT(sch->sch_length == 0, ("%s: sch->sch_length %d not 0",
__func__, sch->sch_length));
mtx_destroy(&sch->sch_mtx);
}
KASSERT(V_tcp_syncache.cache_count == 0, ("%s: cache_count %d not 0",
__func__, V_tcp_syncache.cache_count));
/* Free the allocated global resources. */
uma_zdestroy(V_tcp_syncache.zone);
FREE(V_tcp_syncache.hashbase, M_SYNCACHE);
free(V_tcp_syncache.hashbase, M_SYNCACHE);
}
#endif