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Differential D40319 Diff 122569 sys/netinet/tcp_hostcache.c

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sys/netinet/tcp_hostcache.c

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}; };
/* Arbitrary values */ /* Arbitrary values */
#define TCP_HOSTCACHE_HASHSIZE 512 #define TCP_HOSTCACHE_HASHSIZE 512
#define TCP_HOSTCACHE_BUCKETLIMIT 30 #define TCP_HOSTCACHE_BUCKETLIMIT 30
#define TCP_HOSTCACHE_EXPIRE 60*60 /* one hour */ #define TCP_HOSTCACHE_EXPIRE 60*60 /* one hour */
#define TCP_HOSTCACHE_PRUNE 5*60 /* every 5 minutes */ #define TCP_HOSTCACHE_PRUNE 5*60 /* every 5 minutes */
VNET_DEFINE_STATIC(struct tcp_hostcache, tcp_hostcache); VNET_DEFINE_STATIC(struct tcp_hostcache, tcp_hostcache) = {
.hashsize = TCP_HOSTCACHE_HASHSIZE,
zleiAuthorUnsubmitted
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Found a bug.

kenv net.inet.tcp.hostcache.hashsize=256 && kenv -u net.inet.tcp.hostcache.hashsize will trigger ASSERT panic.

zlei: Found a bug. `kenv net.inet.tcp.hostcache.hashsize=256 && kenv -u net.inet.tcp.hostcache.
.bucket_limit = TCP_HOSTCACHE_BUCKETLIMIT,
.expire = TCP_HOSTCACHE_EXPIRE,
zleiAuthorUnsubmitted
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Ooops, expire and prune are not loader tunable ;(

zlei: Ooops, `expire` and `prune` are not loader tunable ;(
.prune = TCP_HOSTCACHE_PRUNE,
};
#define V_tcp_hostcache VNET(tcp_hostcache) #define V_tcp_hostcache VNET(tcp_hostcache)
VNET_DEFINE_STATIC(struct callout, tcp_hc_callout); VNET_DEFINE_STATIC(struct callout, tcp_hc_callout);
#define V_tcp_hc_callout VNET(tcp_hc_callout) #define V_tcp_hc_callout VNET(tcp_hc_callout)
static struct hc_metrics *tcp_hc_lookup(struct in_conninfo *); static struct hc_metrics *tcp_hc_lookup(struct in_conninfo *);
static int sysctl_tcp_hc_list(SYSCTL_HANDLER_ARGS); static int sysctl_tcp_hc_list(SYSCTL_HANDLER_ARGS);
static int sysctl_tcp_hc_histo(SYSCTL_HANDLER_ARGS); static int sysctl_tcp_hc_histo(SYSCTL_HANDLER_ARGS);
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tcp_hc_init(void) tcp_hc_init(void)
{ {
u_int cache_limit; u_int cache_limit;
int i; int i;
/* /*
* Initialize hostcache structures. * Initialize hostcache structures.
*/ */
atomic_store_int(&V_tcp_hostcache.cache_count, 0);
V_tcp_hostcache.hashsize = TCP_HOSTCACHE_HASHSIZE;
V_tcp_hostcache.bucket_limit = TCP_HOSTCACHE_BUCKETLIMIT;
V_tcp_hostcache.expire = TCP_HOSTCACHE_EXPIRE;
V_tcp_hostcache.prune = TCP_HOSTCACHE_PRUNE;
V_tcp_hostcache.hashsalt = arc4random(); V_tcp_hostcache.hashsalt = arc4random();
TUNABLE_INT_FETCH("net.inet.tcp.hostcache.hashsize",
&V_tcp_hostcache.hashsize);
if (!powerof2(V_tcp_hostcache.hashsize)) { if (!powerof2(V_tcp_hostcache.hashsize)) {
printf("WARNING: hostcache hash size is not a power of 2.\n"); printf("WARNING: hostcache hash size is not a power of 2.\n");
V_tcp_hostcache.hashsize = TCP_HOSTCACHE_HASHSIZE; /* default */ V_tcp_hostcache.hashsize = TCP_HOSTCACHE_HASHSIZE; /* default */
} }
V_tcp_hostcache.hashmask = V_tcp_hostcache.hashsize - 1; V_tcp_hostcache.hashmask = V_tcp_hostcache.hashsize - 1;
TUNABLE_INT_FETCH("net.inet.tcp.hostcache.bucketlimit",
&V_tcp_hostcache.bucket_limit);
cache_limit = V_tcp_hostcache.hashsize * V_tcp_hostcache.bucket_limit; cache_limit = V_tcp_hostcache.hashsize * V_tcp_hostcache.bucket_limit;
if (V_tcp_hostcache.cache_limit == 0)
V_tcp_hostcache.cache_limit = cache_limit; V_tcp_hostcache.cache_limit = cache_limit;
TUNABLE_INT_FETCH("net.inet.tcp.hostcache.cachelimit", else if (V_tcp_hostcache.cache_limit > cache_limit)
&V_tcp_hostcache.cache_limit);
if (V_tcp_hostcache.cache_limit > cache_limit)
V_tcp_hostcache.cache_limit = cache_limit; V_tcp_hostcache.cache_limit = cache_limit;
/* /*
* Allocate the hash table. * Allocate the hash table.
*/ */
V_tcp_hostcache.hashbase = (struct hc_head *) V_tcp_hostcache.hashbase = (struct hc_head *)
malloc(V_tcp_hostcache.hashsize * sizeof(struct hc_head), malloc(V_tcp_hostcache.hashsize * sizeof(struct hc_head),
M_HOSTCACHE, M_WAITOK | M_ZERO); M_HOSTCACHE, M_WAITOK | M_ZERO);
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