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Merge pull request #1671 from donaldsharp/southbound_pointer

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Southbound pointer
This commit is contained in:
Russ White 2018-01-26 16:40:01 -05:00 committed by GitHub
commit 1b0d575cf9
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 81 additions and 30 deletions
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8
zebra/rt.h
View File

@ -60,15 +60,17 @@ enum southbound_results {
* semantics so we will end up with a delete than
* a re-add.
*/
extern void kernel_route_rib(struct prefix *p, struct prefix *src_p,
struct route_entry *old, struct route_entry *new);
extern void kernel_route_rib(struct route_node *rn, struct prefix *p,
struct prefix *src_p, struct route_entry *old,
struct route_entry *new);
/*
* So route install/failure may not be immediately known
* so let's separate it out and allow the result to
* be passed back up.
*/
extern void kernel_route_rib_pass_fail(struct prefix *p,
extern void kernel_route_rib_pass_fail(struct route_node *rn,
struct prefix *p,
struct route_entry *re,
enum southbound_results res);

9
zebra/rt_netlink.c
View File

@ -1642,8 +1642,9 @@ int kernel_get_ipmr_sg_stats(struct zebra_vrf *zvrf, void *in)
return suc;
}
void kernel_route_rib(struct prefix *p, struct prefix *src_p,
struct route_entry *old, struct route_entry *new)
void kernel_route_rib(struct route_node *rn, struct prefix *p,
struct prefix *src_p, struct route_entry *old,
struct route_entry *new)
{
int ret = 0;
@ -1672,7 +1673,7 @@ void kernel_route_rib(struct prefix *p, struct prefix *src_p,
ret = netlink_route_multipath(RTM_NEWROUTE, p,
src_p, new, 0);
}
kernel_route_rib_pass_fail(p, new,
kernel_route_rib_pass_fail(rn, p, new,
(!ret) ?
SOUTHBOUND_INSTALL_SUCCESS :
SOUTHBOUND_INSTALL_FAILURE);
@ -1682,7 +1683,7 @@ void kernel_route_rib(struct prefix *p, struct prefix *src_p,
if (old) {
ret = netlink_route_multipath(RTM_DELROUTE, p, src_p, old, 0);
kernel_route_rib_pass_fail(p, old,
kernel_route_rib_pass_fail(rn, p, old,
(!ret) ?
SOUTHBOUND_DELETE_SUCCESS :
SOUTHBOUND_DELETE_FAILURE);

9
zebra/rt_socket.c
View File

@ -387,8 +387,9 @@ static int kernel_rtm(int cmd, struct prefix *p, struct route_entry *re)
return 0;
}
void kernel_route_rib(struct prefix *p, struct prefix *src_p,
struct route_entry *old, struct route_entry *new)
void kernel_route_rib(struct route_node *rn, struct prefix *p,
struct prefix *src_p, struct route_entry *old,
struct route_entry *new)
{
int route = 0;
@ -410,12 +411,12 @@ void kernel_route_rib(struct prefix *p, struct prefix *src_p,
zlog_err("Can't lower privileges");
if (new) {
kernel_route_rib_pass_fail(p, new,
kernel_route_rib_pass_fail(rn, p, new,
(!route) ?
SOUTHBOUND_INSTALL_SUCCESS :
SOUTHBOUND_INSTALL_FAILURE);
} else {
kernel_route_rib_pass_fail(p, old,
kernel_route_rib_pass_fail(rn, p, old,
(!route) ?
SOUTHBOUND_DELETE_SUCCESS :
SOUTHBOUND_DELETE_FAILURE);

85
zebra/zebra_rib.c
View File

@ -998,14 +998,19 @@ int zebra_rib_labeled_unicast(struct route_entry *re)
return 1;
}
void kernel_route_rib_pass_fail(struct prefix *p, struct route_entry *re,
void kernel_route_rib_pass_fail(struct route_node *rn, struct prefix *p,
struct route_entry *re,
enum southbound_results res)
{
struct nexthop *nexthop;
char buf[PREFIX_STRLEN];
rib_dest_t *dest;
dest = rib_dest_from_rnode(rn);
switch (res) {
case SOUTHBOUND_INSTALL_SUCCESS:
dest->selected_fib = re;
for (ALL_NEXTHOPS(re->nexthop, nexthop)) {
if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE))
continue;
@ -1019,16 +1024,37 @@ void kernel_route_rib_pass_fail(struct prefix *p, struct route_entry *re,
p, ZAPI_ROUTE_INSTALLED);
break;
case SOUTHBOUND_INSTALL_FAILURE:
/*
* I am not sure this is the right thing to do here
* but the code always set selected_fib before
* this assignment was moved here.
*/
dest->selected_fib = re;
zsend_route_notify_owner(re->type, re->instance, re->vrf_id,
p, ZAPI_ROUTE_FAIL_INSTALL);
zlog_warn("%u:%s: Route install failed", re->vrf_id,
prefix2str(p, buf, sizeof(buf)));
break;
case SOUTHBOUND_DELETE_SUCCESS:
/*
* The case where selected_fib is not re is
* when we have received a system route
* that is overriding our installed route
* as such we should leave the selected_fib
* pointer alone
*/
if (dest->selected_fib == re)
dest->selected_fib = NULL;
for (ALL_NEXTHOPS(re->nexthop, nexthop))
UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB);
break;
case SOUTHBOUND_DELETE_FAILURE:
/*
* Should we set this to NULL if the
* delete fails?
*/
dest->selected_fib = NULL;
zlog_warn("%u:%s: Route Deletion failure", re->vrf_id,
prefix2str(p, buf, sizeof(buf)));
break;
@ -1083,7 +1109,7 @@ void rib_install_kernel(struct route_node *rn, struct route_entry *re,
* the kernel.
*/
hook_call(rib_update, rn, "installing in kernel");
kernel_route_rib(p, src_p, old, re);
kernel_route_rib(rn, p, src_p, old, re);
zvrf->installs++;
return;
@ -1110,7 +1136,7 @@ void rib_uninstall_kernel(struct route_node *rn, struct route_entry *re)
* the kernel.
*/
hook_call(rib_update, rn, "uninstalling from kernel");
kernel_route_rib(p, src_p, re, NULL);
kernel_route_rib(rn, p, src_p, re, NULL);
zvrf->removals++;
return;
@ -1132,8 +1158,6 @@ static void rib_uninstall(struct route_node *rn, struct route_entry *re)
/* If labeled-unicast route, uninstall transit LSP. */
if (zebra_rib_labeled_unicast(re))
zebra_mpls_lsp_uninstall(info->zvrf, rn, re);
dest->selected_fib = NULL;
}
if (CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED)) {
@ -1218,7 +1242,6 @@ static void rib_process_add_fib(struct zebra_vrf *zvrf, struct route_node *rn,
return;
}
dest->selected_fib = new;
if (IS_ZEBRA_DEBUG_RIB) {
char buf[SRCDEST2STR_BUFFER];
srcdest_rnode2str(rn, buf, sizeof(buf));
@ -1232,6 +1255,8 @@ static void rib_process_add_fib(struct zebra_vrf *zvrf, struct route_node *rn,
if (!RIB_SYSTEM_ROUTE(new))
rib_install_kernel(rn, new, NULL);
else
dest->selected_fib = new;
UNSET_FLAG(new->status, ROUTE_ENTRY_CHANGED);
}
@ -1256,8 +1281,17 @@ static void rib_process_del_fib(struct zebra_vrf *zvrf, struct route_node *rn,
if (!RIB_SYSTEM_ROUTE(old))
rib_uninstall_kernel(rn, old);
dest->selected_fib = NULL;
else {
/*
* We are setting this to NULL here
* because that is what we traditionally
* have been doing. I am not positive
* that this is the right thing to do
* but let's leave the code alone
* for the RIB_SYSTEM_ROUTE case
*/
dest->selected_fib = NULL;
}
/* Update nexthop for route, reset changed flag. */
nexthop_active_update(rn, old, 1);
@ -1271,7 +1305,6 @@ static void rib_process_update_fib(struct zebra_vrf *zvrf,
{
struct nexthop *nexthop = NULL;
int nh_active = 0;
int installed = 1;
rib_dest_t *dest = rib_dest_from_rnode(rn);
/*
@ -1321,11 +1354,23 @@ static void rib_process_update_fib(struct zebra_vrf *zvrf,
zebra_mpls_lsp_install(zvrf, rn, new);
rib_install_kernel(rn, new, old);
} else {
/*
* We do not need to install the
* selected route because it
* is already isntalled by
* the system( ie not us )
* so just mark it as winning
* we do need to ensure that
* if we uninstall a route
* from ourselves we don't
* over write this pointer
*/
dest->selected_fib = NULL;
}
/* If install succeeded or system route, cleanup flags
* for prior route. */
if (installed && new != old) {
if (new != old) {
if (RIB_SYSTEM_ROUTE(new)) {
if (!RIB_SYSTEM_ROUTE(old))
rib_uninstall_kernel(rn, old);
@ -1336,10 +1381,6 @@ static void rib_process_update_fib(struct zebra_vrf *zvrf,
NEXTHOP_FLAG_FIB);
}
}
/* Update for redistribution. */
if (installed)
dest->selected_fib = new;
}
/*
@ -1347,7 +1388,7 @@ static void rib_process_update_fib(struct zebra_vrf *zvrf,
* failed, we
* may need to uninstall and delete for redistribution.
*/
if (!nh_active || !installed) {
if (!nh_active) {
if (IS_ZEBRA_DEBUG_RIB) {
char buf[SRCDEST2STR_BUFFER];
srcdest_rnode2str(rn, buf, sizeof(buf));
@ -1374,7 +1415,8 @@ static void rib_process_update_fib(struct zebra_vrf *zvrf,
if (!RIB_SYSTEM_ROUTE(old))
rib_uninstall_kernel(rn, old);
dest->selected_fib = NULL;
else
dest->selected_fib = NULL;
}
} else {
/*
@ -1387,12 +1429,12 @@ static void rib_process_update_fib(struct zebra_vrf *zvrf,
* to add routes.
*/
if (!RIB_SYSTEM_ROUTE(new)) {
int in_fib = 0;
bool in_fib = false;
for (ALL_NEXTHOPS(new->nexthop, nexthop))
if (CHECK_FLAG(nexthop->flags,
NEXTHOP_FLAG_FIB)) {
in_fib = 1;
in_fib = true;
break;
}
if (!in_fib)
@ -2439,6 +2481,11 @@ void rib_delete(afi_t afi, safi_t safi, vrf_id_t vrf_id, int type,
UNSET_FLAG(rtnh->flags,
NEXTHOP_FLAG_FIB);
/*
* This is a non FRR route
* as such we should mark
* it as deleted
*/
dest->selected_fib = NULL;
} else {
/* This means someone else, other than Zebra,