Fix rss_check IPv4 reverse-path misqueue and add key_sync option

Author: jfb8856606

freebsd/netinet/in_pcb.c

@@ -961,7 +961,7 @@ in_pcb_lport_dest(const struct inpcb *inp, struct sockaddr *lsa,
 				for (rss_fast = 0; rss_fast < 8; rss_fast++) {
 					if (ff_rss_adjust_sport(ifp->if_softc,
 					    faddr.s_addr, laddr.s_addr, fport,
-					    &rss_sel) != 0)
+					    &rss_sel, first, last) != 0)
 						break;
 					lport = htons(rss_sel);
 					if (in_pcblookup_local(pcbinfo, laddr,

lib/ff_config.c

@@ -943,6 +943,7 @@ rss_check_cfg_handler(struct ff_config *cfg, __rte_unused const char *section,
             fprintf(stderr, "rss_check_cfg_handler malloc failed\n");
             return 0;
         }
+        rcc->key_sync = 1;   /* default on; "key_sync=" may override */
         cfg->dpdk.rss_check_cfgs = rcc;
     }
 
@@ -952,6 +953,8 @@ rss_check_cfg_handler(struct ff_config *cfg, __rte_unused const char *section,
         cur->enable = atoi(value);
     } else if (strcmp(name, "recheck") == 0) {
         cur->recheck = atoi(value);
+    } else if (strcmp(name, "key_sync") == 0) {
+        cur->key_sync = atoi(value);
     } else if (strcmp(name, "rss_tbl") == 0) {
         cur->rss_tbl_str = strdup(value);
         if (cur->rss_tbl_str) {

lib/ff_config.h

@@ -241,6 +241,7 @@ struct ff_rss_tbl_cfg {
 struct ff_rss_check_cfg {
     int enable;
     int recheck;
+    int key_sync;   /* 1=sync NIC key (default); 0=soft scan fallback */
     int nb_rss_tbl;
     char *rss_tbl_str;
     struct ff_rss_tbl_cfg rss_tbl_cfgs[FF_RSS_TBL_MAX_ENTRIES];