#ifdef HAVE_NETLINK
+#include "zebra/debug.h"
#include "zebra/rt.h"
#include "zebra/rt_netlink.h"
#include "zebra/zebra_mpls.h"
/*
- * Install Label Forwarding entry into the kernel.
+ * LSP forwarding update using dataplane context information.
*/
-int kernel_add_lsp(zebra_lsp_t *lsp)
+enum zebra_dplane_result kernel_lsp_update(struct zebra_dplane_ctx *ctx)
{
- int ret;
-
- if (!lsp || !lsp->best_nhlfe) // unexpected
- return -1;
-
- ret = netlink_mpls_multipath(RTM_NEWROUTE, lsp);
-
- return ret;
-}
-
-/*
- * Update Label Forwarding entry in the kernel. This means that the Label
- * forwarding entry is already installed and needs an update - either a new
- * path is to be added, an installed path has changed (e.g., outgoing label)
- * or an installed path (but not all paths) has to be removed.
- * TODO: Performs a DEL followed by ADD now, need to change to REPLACE. Note
- * that REPLACE was originally implemented for IPv4 nexthops but removed as
- * it was not functioning when moving from swap to PHP as that was signaled
- * through the metric field (before kernel-MPLS). This shouldn't be an issue
- * any longer, so REPLACE can be reintroduced.
- */
-int kernel_upd_lsp(zebra_lsp_t *lsp)
-{
- int ret;
- zebra_nhlfe_t *nhlfe;
- struct nexthop *nexthop;
-
- if (!lsp || !lsp->best_nhlfe) // unexpected
- return -1;
+ int cmd, ret = -1;
+
+ /* Call to netlink layer based on type of update */
+ if (dplane_ctx_get_op(ctx) == DPLANE_OP_LSP_DELETE) {
+ cmd = RTM_DELROUTE;
+ } else if (dplane_ctx_get_op(ctx) == DPLANE_OP_LSP_INSTALL ||
+ dplane_ctx_get_op(ctx) == DPLANE_OP_LSP_UPDATE) {
+
+ /* Validate */
+ if (dplane_ctx_get_best_nhlfe(ctx) == NULL) {
+ if (IS_ZEBRA_DEBUG_KERNEL || IS_ZEBRA_DEBUG_MPLS)
+ zlog_debug("LSP in-label %u: update fails, no best NHLFE",
+ dplane_ctx_get_in_label(ctx));
+ goto done;
+ }
- /* Any NHLFE that was installed but is not selected now needs to
- * have its flags updated.
- */
- for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) {
- nexthop = nhlfe->nexthop;
- if (!nexthop)
- continue;
+ cmd = RTM_NEWROUTE;
+ } else
+ /* Invalid op? */
+ goto done;
- if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED) &&
- !CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED)) {
- UNSET_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED);
- UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB);
- }
- }
+ ret = netlink_mpls_multipath(cmd, ctx);
- ret = netlink_mpls_multipath(RTM_NEWROUTE, lsp);
+done:
- return ret;
+ return (ret == 0 ?
+ ZEBRA_DPLANE_REQUEST_SUCCESS : ZEBRA_DPLANE_REQUEST_FAILURE);
}
/*
- * Delete Label Forwarding entry from the kernel.
+ * Pseudowire update api - not supported by netlink as of 12/18,
+ * but note that the default has been to report 'success' for pw updates
+ * on unsupported platforms.
*/
-int kernel_del_lsp(zebra_lsp_t *lsp)
+enum zebra_dplane_result kernel_pw_update(struct zebra_dplane_ctx *ctx)
{
- int ret;
-
- if (!lsp) // unexpected
- return -1;
-
- if (!CHECK_FLAG(lsp->flags, LSP_FLAG_INSTALLED))
- return -1;
-
- ret = netlink_mpls_multipath(RTM_DELROUTE, lsp);
-
- return ret;
+ return ZEBRA_DPLANE_REQUEST_SUCCESS;
}
int mpls_kernel_init(void)