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isisd: make use of advanced concepts like arrays and loops

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Have an array of spftrees instead of a separate spftree and an
spftree6 for which all the code gets duplicated.

Signed-off-by: Christian Franke <chris@opensourcerouting.org>
This commit is contained in:
Christian Franke 2018-07-26 12:57:38 +02:00
parent 26b0598f6b
commit be985ba059
3 changed files with 58 additions and 72 deletions
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91
isisd/isis_spf.c
View File

@ -508,67 +508,44 @@ static void isis_spftree_adj_del(struct isis_spftree *spftree,
void spftree_area_init(struct isis_area *area) void spftree_area_init(struct isis_area *area)
{ {
if (area->is_type & IS_LEVEL_1) { for (int tree = SPFTREE_IPV4; tree < SPFTREE_COUNT; tree++) {
if (area->spftree[0] == NULL) for (int level = ISIS_LEVEL1; level <= ISIS_LEVEL2; level++) {
area->spftree[0] = isis_spftree_new(area); if (!(area->is_type & level))
if (area->spftree6[0] == NULL) continue;
area->spftree6[0] = isis_spftree_new(area); if (area->spftree[tree][level - 1])
} continue;
if (area->is_type & IS_LEVEL_2) { area->spftree[tree][level - 1] = isis_spftree_new(area);
if (area->spftree[1] == NULL) }
area->spftree[1] = isis_spftree_new(area);
if (area->spftree6[1] == NULL)
area->spftree6[1] = isis_spftree_new(area);
} }
return;
} }
void spftree_area_del(struct isis_area *area) void spftree_area_del(struct isis_area *area)
{ {
if (area->is_type & IS_LEVEL_1) { for (int tree = SPFTREE_IPV4; tree < SPFTREE_COUNT; tree++) {
if (area->spftree[0] != NULL) { for (int level = ISIS_LEVEL1; level <= ISIS_LEVEL2; level++) {
isis_spftree_del(area->spftree[0]); if (!(area->is_type & level))
area->spftree[0] = NULL; continue;
} if (!area->spftree[tree][level - 1])
if (area->spftree6[0]) { continue;
isis_spftree_del(area->spftree6[0]);
area->spftree6[0] = NULL; isis_spftree_del(area->spftree[tree][level - 1]);
} }
} }
if (area->is_type & IS_LEVEL_2) {
if (area->spftree[1] != NULL) {
isis_spftree_del(area->spftree[1]);
area->spftree[1] = NULL;
}
if (area->spftree6[1] != NULL) {
isis_spftree_del(area->spftree6[1]);
area->spftree6[1] = NULL;
}
}
return;
} }
void spftree_area_adj_del(struct isis_area *area, struct isis_adjacency *adj) void spftree_area_adj_del(struct isis_area *area, struct isis_adjacency *adj)
{ {
if (area->is_type & IS_LEVEL_1) { for (int tree = SPFTREE_IPV4; tree < SPFTREE_COUNT; tree++) {
if (area->spftree[0] != NULL) for (int level = ISIS_LEVEL1; level <= ISIS_LEVEL2; level++) {
isis_spftree_adj_del(area->spftree[0], adj); if (!(area->is_type & level))
if (area->spftree6[0] != NULL) continue;
isis_spftree_adj_del(area->spftree6[0], adj); if (!area->spftree[tree][level - 1])
continue;
isis_spftree_adj_del(area->spftree[tree][level - 1],
adj);
}
} }
if (area->is_type & IS_LEVEL_2) {
if (area->spftree[1] != NULL)
isis_spftree_adj_del(area->spftree[1], adj);
if (area->spftree6[1] != NULL)
isis_spftree_adj_del(area->spftree6[1], adj);
}
return;
} }
/* /*
@ -1274,9 +1251,9 @@ static int isis_run_spf(struct isis_area *area, int level, int family,
start_time = (start_time * 1000000) + nowtv->tv_usec; start_time = (start_time * 1000000) + nowtv->tv_usec;
if (family == AF_INET) if (family == AF_INET)
spftree = area->spftree[level - 1]; spftree = area->spftree[SPFTREE_IPV4][level - 1];
else if (family == AF_INET6) else if (family == AF_INET6)
spftree = area->spftree6[level - 1]; spftree = area->spftree[SPFTREE_IPV6][level - 1];
assert(spftree); assert(spftree);
assert(sysid); assert(sysid);
@ -1417,7 +1394,7 @@ static struct isis_spf_run *isis_run_spf_arg(struct isis_area *area, int level)
int isis_spf_schedule(struct isis_area *area, int level) int isis_spf_schedule(struct isis_area *area, int level)
{ {
struct isis_spftree *spftree = area->spftree[level - 1]; struct isis_spftree *spftree = area->spftree[SPFTREE_IPV4][level - 1];
time_t now = monotime(NULL); time_t now = monotime(NULL);
int diff = now - spftree->last_run_monotime; int diff = now - spftree->last_run_monotime;
@ -1569,23 +1546,23 @@ DEFUN (show_isis_topology,
if ((level & levels) == 0) if ((level & levels) == 0)
continue; continue;
if (area->ip_circuits > 0 && area->spftree[level - 1] if (area->ip_circuits > 0 && area->spftree[SPFTREE_IPV4][level - 1]
&& isis_vertex_queue_count(&area->spftree[level - 1]->paths) > 0) { && isis_vertex_queue_count(&area->spftree[SPFTREE_IPV4][level - 1]->paths) > 0) {
vty_out(vty, vty_out(vty,
"IS-IS paths to level-%d routers that speak IP\n", "IS-IS paths to level-%d routers that speak IP\n",
level); level);
isis_print_paths( isis_print_paths(
vty, &area->spftree[level - 1]->paths, vty, &area->spftree[SPFTREE_IPV4][level - 1]->paths,
isis->sysid); isis->sysid);
vty_out(vty, "\n"); vty_out(vty, "\n");
} }
if (area->ipv6_circuits > 0 && area->spftree6[level - 1] if (area->ipv6_circuits > 0 && area->spftree[SPFTREE_IPV6][level - 1]
&& isis_vertex_queue_count(&area->spftree6[level - 1]->paths) > 0) { && isis_vertex_queue_count(&area->spftree[SPFTREE_IPV6][level - 1]->paths) > 0) {
vty_out(vty, vty_out(vty,
"IS-IS paths to level-%d routers that speak IPv6\n", "IS-IS paths to level-%d routers that speak IPv6\n",
level); level);
isis_print_paths( isis_print_paths(
vty, &area->spftree6[level - 1]->paths, vty, &area->spftree[SPFTREE_IPV6][level - 1]->paths,
isis->sysid); isis->sysid);
vty_out(vty, "\n"); vty_out(vty, "\n");
} }

30
isisd/isisd.c
View File

@ -1319,10 +1319,12 @@ DEFUN (show_isis_summary,
vty_out(vty, "\n"); vty_out(vty, "\n");
vty_out(vty, " IPv4 route computation:\n"); vty_out(vty, " IPv4 route computation:\n");
isis_spf_print(area->spftree[level - 1], vty); isis_spf_print(area->spftree[SPFTREE_IPV4][level - 1],
vty);
vty_out(vty, " IPv6 route computation:\n"); vty_out(vty, " IPv6 route computation:\n");
isis_spf_print(area->spftree6[level - 1], vty); isis_spf_print(area->spftree[SPFTREE_IPV6][level - 1],
vty);
} }
} }
vty_out(vty, "\n"); vty_out(vty, "\n");
@ -1664,15 +1666,17 @@ void isis_area_invalidate_routes(struct isis_area *area, int levels)
for (int level = ISIS_LEVEL1; level <= ISIS_LEVEL2; level++) { for (int level = ISIS_LEVEL1; level <= ISIS_LEVEL2; level++) {
if (!(level & levels)) if (!(level & levels))
continue; continue;
isis_spf_invalidate_routes(area->spftree[level - 1]); for (int tree = SPFTREE_IPV4; tree < SPFTREE_COUNT; tree++) {
isis_spf_invalidate_routes(area->spftree6[level - 1]); isis_spf_invalidate_routes(
area->spftree[tree][level - 1]);
}
} }
} }
void isis_area_verify_routes(struct isis_area *area) void isis_area_verify_routes(struct isis_area *area)
{ {
isis_spf_verify_routes(area, area->spftree); for (int tree = SPFTREE_IPV4; tree < SPFTREE_COUNT; tree++)
isis_spf_verify_routes(area, area->spftree6); isis_spf_verify_routes(area, area->spftree[tree]);
} }
static void area_resign_level(struct isis_area *area, int level) static void area_resign_level(struct isis_area *area, int level)
@ -1684,14 +1688,14 @@ static void area_resign_level(struct isis_area *area, int level)
lsp_db_destroy(area->lspdb[level - 1]); lsp_db_destroy(area->lspdb[level - 1]);
area->lspdb[level - 1] = NULL; area->lspdb[level - 1] = NULL;
} }
if (area->spftree[level - 1]) {
isis_spftree_del(area->spftree[level - 1]); for (int tree = SPFTREE_IPV4; tree < SPFTREE_COUNT; tree++) {
area->spftree[level - 1] = NULL; if (area->spftree[tree][level - 1]) {
} isis_spftree_del(area->spftree[tree][level - 1]);
if (area->spftree6[level - 1]) { area->spftree[tree][level - 1] = NULL;
isis_spftree_del(area->spftree6[level - 1]); }
area->spftree6[level - 1] = NULL;
} }
THREAD_TIMER_OFF(area->spf_timer[level - 1]); THREAD_TIMER_OFF(area->spf_timer[level - 1]);
sched_debug( sched_debug(

9
isisd/isisd.h
View File

@ -63,11 +63,16 @@ struct isis {
extern struct isis *isis; extern struct isis *isis;
DECLARE_QOBJ_TYPE(isis_area) DECLARE_QOBJ_TYPE(isis_area)
enum spf_tree_id {
SPFTREE_IPV4 = 0,
SPFTREE_IPV6,
SPFTREE_COUNT
};
struct isis_area { struct isis_area {
struct isis *isis; /* back pointer */ struct isis *isis; /* back pointer */
dict_t *lspdb[ISIS_LEVELS]; /* link-state dbs */ dict_t *lspdb[ISIS_LEVELS]; /* link-state dbs */
struct isis_spftree *spftree[ISIS_LEVELS]; /* The v4 SPTs */ struct isis_spftree *spftree[SPFTREE_COUNT][ISIS_LEVELS];
struct isis_spftree *spftree6[ISIS_LEVELS]; /* The v6 SPTs */
#define DEFAULT_LSP_MTU 1497 #define DEFAULT_LSP_MTU 1497
unsigned int lsp_mtu; /* Size of LSPs to generate */ unsigned int lsp_mtu; /* Size of LSPs to generate */
struct list *circuit_list; /* IS-IS circuits */ struct list *circuit_list; /* IS-IS circuits */