Commit 492d3b71 authored by Lutz Donnerhacke's avatar Lutz Donnerhacke
Browse files

libalias: Restructure - Group incoming links

Reorder incoming links by grouping of common search terms.
Significant performance improvement for incoming (missing) flows.

Remove LSNAT from outgoing search.
Slight speedup due to less comparsions in the loop.

MFC after:	1 week
Differential Revision: https://reviews.freebsd.org/D30574
parent d4ab07d2
......@@ -378,12 +378,10 @@ Lookup table starting points:
*/
/* Local prototypes */
static u_int StartPointIn(struct in_addr, u_short, int);
static u_int
StartPointOut(struct in_addr, struct in_addr,
u_short, u_short, int);
static struct group_in *
StartPointIn(struct libalias *, struct in_addr, u_short, int, int);
static u_int
StartPointOut(struct in_addr, struct in_addr, u_short, u_short, int);
static int SeqDiff(u_long, u_long);
#ifndef NO_FW_PUNCH
......@@ -401,26 +399,47 @@ static void UninitPacketAliasLog(struct libalias *);
void SctpShowAliasStats(struct libalias *la);
static u_int
StartPartialIn(u_short alias_port, int link_type)
{
return (link_type == LINK_PPTP) ? 0
: (alias_port % LINK_PARTIAL_SIZE);
}
#define INGUARD \
if (grp->alias_port != alias_port || \
grp->link_type != link_type || \
grp->alias_addr.s_addr != alias_addr.s_addr) \
continue;
static u_int
StartPointIn(struct in_addr alias_addr,
u_short alias_port,
int link_type)
static struct group_in *
StartPointIn(struct libalias *la,
struct in_addr alias_addr, u_short alias_port, int link_type,
int create)
{
u_int n;
struct group_in *grp, *tmp;
n = alias_addr.s_addr;
if (link_type != LINK_PPTP)
n += alias_port;
n += link_type;
return (n % LINK_TABLE_IN_SIZE);
n %= LINK_TABLE_IN_SIZE;
LIST_FOREACH_SAFE(grp, &la->groupTableIn[n], group_in, tmp) {
/* Auto cleanup */
if (LIST_EMPTY(&grp->full) && LIST_EMPTY(&grp->partial)) {
LIST_REMOVE(grp, group_in);
free(grp);
} else {
INGUARD;
return (grp);
}
}
if (!create || (grp = malloc(sizeof(*grp))) == NULL)
return (grp);
grp->alias_addr = alias_addr;
grp->alias_port = alias_port;
grp->link_type = link_type;
LIST_INIT(&grp->full);
LIST_INIT(&grp->partial);
LIST_INSERT_HEAD(&la->groupTableIn[n], grp, group_in);
return (grp);
}
#undef INGUARD
static u_int
StartPointOut(struct in_addr src_addr, struct in_addr dst_addr,
......@@ -814,12 +833,21 @@ static void
CleanupAliasData(struct libalias *la)
{
struct alias_link *lnk, *lnk_tmp;
struct group_in *grp, *grp_tmp;
u_int i;
LIBALIAS_LOCK_ASSERT(la);
/* permanent entries may stay */
TAILQ_FOREACH_SAFE(lnk, &la->checkExpire, list_expire, lnk_tmp)
DeleteLink(&lnk);
for (i = 0; i < LINK_TABLE_IN_SIZE; i++)
LIST_FOREACH_SAFE(grp, &la->groupTableIn[i], group_in, grp_tmp)
if (LIST_EMPTY(&grp->full) && LIST_EMPTY(&grp->partial)) {
LIST_REMOVE(grp, group_in);
free(grp);
}
}
static void
......@@ -875,9 +903,10 @@ DeleteLink(struct alias_link **plnk)
next = curr->next;
free(curr);
} while ((curr = next) != head);
} else {
/* Adjust output table pointers */
LIST_REMOVE(lnk, list_out);
}
/* Adjust output table pointers */
LIST_REMOVE(lnk, list_out);
/* Adjust input table pointers */
LIST_REMOVE(lnk, list_in);
......@@ -939,8 +968,10 @@ AddLink(struct libalias *la, struct in_addr src_addr, struct in_addr dst_addr,
{
u_int start_point;
struct alias_link *lnk;
struct group_in *grp_in;
LIBALIAS_LOCK_ASSERT(la);
lnk = malloc(sizeof(struct alias_link));
if (lnk != NULL) {
/* Basic initialization */
......@@ -1048,6 +1079,12 @@ AddLink(struct libalias *la, struct in_addr src_addr, struct in_addr dst_addr,
break;
}
grp_in = StartPointIn(la, alias_addr, lnk->alias_port, link_type, 1);
if (grp_in == NULL) {
free(lnk);
return (NULL);
}
/* Set up pointers for output lookup table */
start_point = StartPointOut(src_addr, dst_addr,
src_port, dst_port, link_type);
......@@ -1055,11 +1092,9 @@ AddLink(struct libalias *la, struct in_addr src_addr, struct in_addr dst_addr,
/* Set up pointers for input lookup table */
if (lnk->flags & LINK_PARTIALLY_SPECIFIED) {
start_point = StartPartialIn(lnk->alias_port, link_type);
LIST_INSERT_HEAD(&la->linkPartialIn[start_point], lnk, list_in);
LIST_INSERT_HEAD(&grp_in->partial, lnk, list_in);
} else {
start_point = StartPointIn(alias_addr, lnk->alias_port, link_type);
LIST_INSERT_HEAD(&la->linkTableIn[start_point], lnk, list_in);
LIST_INSERT_HEAD(&grp_in->full, lnk, list_in);
}
/* Include the element into the housekeeping list */
......@@ -1114,8 +1149,7 @@ ReLink(struct alias_link *old_lnk,
lnk->src_addr.s_addr != src_addr.s_addr || \
lnk->dst_addr.s_addr != dst_addr.s_addr || \
lnk->dst_port != dst_port || \
lnk->link_type != link_type || \
lnk->server != NULL) \
lnk->link_type != link_type) \
continue;
static struct alias_link *
......@@ -1150,27 +1184,27 @@ _FindLinkOut(struct libalias *la, struct in_addr src_addr,
LIBALIAS_LOCK_ASSERT(la);
lnk = _SearchLinkOut(la, src_addr, dst_addr, src_port, dst_port, link_type);
if (lnk != NULL || !replace_partial_links)
return (lnk);
/* Search for partially specified links. */
if (lnk == NULL && replace_partial_links) {
if (dst_port != 0 && dst_addr.s_addr != INADDR_ANY) {
lnk = _SearchLinkOut(la, src_addr, dst_addr, src_port, 0,
link_type);
if (lnk == NULL)
lnk = _SearchLinkOut(la, src_addr, ANY_ADDR, src_port,
dst_port, link_type);
}
if (lnk == NULL &&
(dst_port != 0 || dst_addr.s_addr != INADDR_ANY)) {
lnk = _SearchLinkOut(la, src_addr, ANY_ADDR, src_port, 0,
link_type);
}
if (lnk != NULL) {
lnk = ReLink(lnk,
src_addr, dst_addr, lnk->alias_addr,
src_port, dst_port, lnk->alias_port,
link_type);
}
if (dst_port != 0 && dst_addr.s_addr != INADDR_ANY) {
lnk = _SearchLinkOut(la, src_addr, dst_addr, src_port, 0,
link_type);
if (lnk == NULL)
lnk = _SearchLinkOut(la, src_addr, ANY_ADDR, src_port,
dst_port, link_type);
}
if (lnk == NULL &&
(dst_port != 0 || dst_addr.s_addr != INADDR_ANY)) {
lnk = _SearchLinkOut(la, src_addr, ANY_ADDR, src_port, 0,
link_type);
}
if (lnk != NULL) {
lnk = ReLink(lnk,
src_addr, dst_addr, lnk->alias_addr,
src_port, dst_port, lnk->alias_port,
link_type);
}
return (lnk);
}
......@@ -1214,9 +1248,8 @@ _FindLinkIn(struct libalias *la, struct in_addr dst_addr,
int replace_partial_links)
{
int flags_in;
u_int start_point;
struct group_in *grp;
struct alias_link *lnk;
struct alias_link *lnk_fully_specified;
struct alias_link *lnk_unknown_all;
struct alias_link *lnk_unknown_dst_addr;
struct alias_link *lnk_unknown_dst_port;
......@@ -1225,7 +1258,6 @@ _FindLinkIn(struct libalias *la, struct in_addr dst_addr,
LIBALIAS_LOCK_ASSERT(la);
/* Initialize pointers */
lnk_fully_specified = NULL;
lnk_unknown_all = NULL;
lnk_unknown_dst_addr = NULL;
lnk_unknown_dst_port = NULL;
......@@ -1238,26 +1270,44 @@ _FindLinkIn(struct libalias *la, struct in_addr dst_addr,
if (dst_port == 0)
flags_in |= LINK_UNKNOWN_DEST_PORT;
#define INGUARD \
if (lnk->alias_port != alias_port || \
lnk->link_type != link_type || \
lnk->alias_addr.s_addr != alias_addr.s_addr) \
continue;
/* Search loop */
start_point = StartPointIn(alias_addr, alias_port, link_type);
if (!(flags_in & LINK_PARTIALLY_SPECIFIED)) {
LIST_FOREACH(lnk, &la->linkTableIn[start_point], list_in) {
INGUARD;
if (lnk->dst_addr.s_addr == dst_addr.s_addr
&& lnk->dst_port == dst_port)
grp = StartPointIn(la, alias_addr, alias_port, link_type, 0);
if (grp == NULL)
return (NULL);
switch (flags_in) {
case 0:
LIST_FOREACH(lnk, &grp->full, list_in) {
if (lnk->dst_addr.s_addr == dst_addr.s_addr &&
lnk->dst_port == dst_port)
return (UseLink(la, lnk));
}
} else {
LIST_FOREACH(lnk, &la->linkTableIn[start_point], list_in) {
int flags = flags_in & LINK_PARTIALLY_SPECIFIED;
break;
case LINK_UNKNOWN_DEST_PORT:
LIST_FOREACH(lnk, &grp->full, list_in) {
if(lnk->dst_addr.s_addr == dst_addr.s_addr) {
lnk_unknown_dst_port = lnk;
break;
}
}
break;
case LINK_UNKNOWN_DEST_ADDR:
LIST_FOREACH(lnk, &grp->full, list_in) {
if(lnk->dst_port == dst_port) {
lnk_unknown_dst_addr = lnk;
break;
}
}
break;
case LINK_PARTIALLY_SPECIFIED:
lnk_unknown_all = LIST_FIRST(&grp->full);
break;
}
if (lnk_unknown_dst_port == NULL) {
LIST_FOREACH(lnk, &grp->partial, list_in) {
int flags = (flags_in | lnk->flags) & LINK_PARTIALLY_SPECIFIED;
INGUARD;
if (flags == LINK_PARTIALLY_SPECIFIED &&
lnk_unknown_all == NULL)
lnk_unknown_all = lnk;
......@@ -1273,26 +1323,6 @@ _FindLinkIn(struct libalias *la, struct in_addr dst_addr,
}
}
start_point = StartPartialIn(alias_port, link_type);
LIST_FOREACH(lnk, &la->linkPartialIn[start_point], list_in) {
int flags = (flags_in | lnk->flags) & LINK_PARTIALLY_SPECIFIED;
INGUARD;
if (flags == LINK_PARTIALLY_SPECIFIED &&
lnk_unknown_all == NULL)
lnk_unknown_all = lnk;
if (flags == LINK_UNKNOWN_DEST_ADDR &&
lnk->dst_port == dst_port &&
lnk_unknown_dst_addr == NULL)
lnk_unknown_dst_addr = lnk;
if (flags == LINK_UNKNOWN_DEST_PORT &&
lnk->dst_addr.s_addr == dst_addr.s_addr) {
lnk_unknown_dst_port = lnk;
break;
}
}
#undef INGUARD
lnk = (lnk_unknown_dst_port != NULL) ? lnk_unknown_dst_port
: (lnk_unknown_dst_addr != NULL) ? lnk_unknown_dst_addr
: lnk_unknown_all;
......@@ -1647,13 +1677,17 @@ FindPptpInByCallId(struct libalias *la, struct in_addr dst_addr,
struct in_addr alias_addr,
u_int16_t dst_call_id)
{
struct group_in *grp;
struct alias_link *lnk;
LIBALIAS_LOCK_ASSERT(la);
LIST_FOREACH(lnk, &la->linkPartialIn[0], list_in)
if (lnk->link_type == LINK_PPTP &&
lnk->dst_addr.s_addr == dst_addr.s_addr &&
lnk->alias_addr.s_addr == alias_addr.s_addr &&
grp = StartPointIn(la, alias_addr, 0, LINK_PPTP, 0);
if (grp == NULL)
return (NULL);
LIST_FOREACH(lnk, &grp->full, list_in)
if (lnk->dst_addr.s_addr == dst_addr.s_addr &&
lnk->dst_port == dst_call_id)
break;
......@@ -2304,9 +2338,11 @@ LibAliasAddServer(struct libalias *la, struct alias_link *lnk, struct in_addr ad
server->port = port;
head = lnk->server;
if (head == NULL)
if (head == NULL) {
server->next = server;
else {
/* not usable for outgoing connections */
LIST_REMOVE(lnk, list_out);
} else {
struct server *s;
for (s = head; s->next != head; s = s->next)
......@@ -2478,9 +2514,7 @@ LibAliasInit(struct libalias *la)
for (i = 0; i < LINK_TABLE_OUT_SIZE; i++)
LIST_INIT(&la->linkTableOut[i]);
for (i = 0; i < LINK_TABLE_IN_SIZE; i++)
LIST_INIT(&la->linkTableIn[i]);
for (i = 0; i < LINK_PARTIAL_SIZE; i++)
LIST_INIT(&la->linkPartialIn[i]);
LIST_INIT(&la->groupTableIn[i]);
TAILQ_INIT(&la->checkExpire);
#ifdef _KERNEL
AliasSctpInit(la);
......
......@@ -68,7 +68,6 @@
/* Sizes of input and output link tables */
#define LINK_TABLE_OUT_SIZE 4001
#define LINK_TABLE_IN_SIZE 4001
#define LINK_PARTIAL_SIZE 401
#define GET_ALIAS_PORT -1
#define GET_ALIAS_ID GET_ALIAS_PORT
......@@ -81,6 +80,14 @@
struct proxy_entry;
struct group_in {
struct in_addr alias_addr;
u_short alias_port;
int link_type;
LIST_ENTRY(group_in) group_in;
LIST_HEAD(, alias_link) full, partial;
};
struct libalias {
LIST_ENTRY(libalias) instancelist;
/* Mode flags documented in alias.h */
......@@ -93,9 +100,8 @@ struct libalias {
/* Lookup table of pointers to chains of link records.
* Each link record is doubly indexed into input and
* output lookup tables. */
LIST_HEAD (, alias_link) linkTableOut[LINK_TABLE_OUT_SIZE];
LIST_HEAD (, alias_link) linkTableIn[LINK_TABLE_IN_SIZE];
LIST_HEAD (, alias_link) linkPartialIn[LINK_PARTIAL_SIZE];
LIST_HEAD (, alias_link) linkTableOut[LINK_TABLE_OUT_SIZE];
LIST_HEAD (, group_in) groupTableIn[LINK_TABLE_IN_SIZE];
/* HouseKeeping */
TAILQ_HEAD (, alias_link) checkExpire;
/* Link statistics */
......
Supports Markdown
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment