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Fix a potential race when purging expired hostcache entries.

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Spotted by:	luigi
This commit is contained in:
Andre Oppermann 2004-04-23 13:54:28 +00:00
parent 6d4ba9cd4e
commit b62dccc7e5
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=128574
1 changed files with 3 additions and 3 deletions
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6
sys/netinet/tcp_hostcache.c
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@ -700,7 +700,7 @@ sysctl_tcp_hc_list(SYSCTL_HANDLER_ARGS)
static void
tcp_hc_purge(void *arg)
{
struct hc_metrics *hc_entry;
struct hc_metrics *hc_entry, *hc_next;
int all = (intptr_t)arg;
int i;
@ -711,8 +711,8 @@ tcp_hc_purge(void *arg)
for (i = 0; i < tcp_hostcache.hashsize; i++) {
THC_LOCK(&tcp_hostcache.hashbase[i].hch_mtx);
TAILQ_FOREACH(hc_entry, &tcp_hostcache.hashbase[i].hch_bucket,
rmx_q) {
TAILQ_FOREACH_SAFE(hc_entry, &tcp_hostcache.hashbase[i].hch_bucket,
rmx_q, hc_next) {
if (all || hc_entry->rmx_expire <= 0) {
TAILQ_REMOVE(&tcp_hostcache.hashbase[i].hch_bucket,
hc_entry, rmx_q);