net/i40e: fix VF overwrite PF RSS LUT for X722

[dpdk.git] / lib / librte_kni / rte_kni.c

diff --git a/lib/librte_kni/rte_kni.c b/lib/librte_kni/rte_kni.c
index b8edd40..73aeccc 100644 (file)
--- a/lib/librte_kni/rte_kni.c
+++ b/lib/librte_kni/rte_kni.c
@@ -483,7 +483,7 @@ int
 rte_kni_handle_request(struct rte_kni *kni)
 {
        unsigned ret;
-       struct rte_kni_request *req;
+       struct rte_kni_request *req = NULL;
 
        if (kni == NULL)
                return -1;
@@ -717,6 +717,47 @@ rte_kni_unregister_handlers(struct rte_kni *kni)
 
        return 0;
 }
+
+int __rte_experimental
+rte_kni_update_link(struct rte_kni *kni, unsigned int linkup)
+{
+       char path[64];
+       char old_carrier[2];
+       const char *new_carrier;
+       int old_linkup;
+       int fd, ret;
+
+       if (kni == NULL)
+               return -1;
+
+       snprintf(path, sizeof(path), "/sys/devices/virtual/net/%s/carrier",
+               kni->name);
+
+       fd = open(path, O_RDWR);
+       if (fd == -1) {
+               RTE_LOG(ERR, KNI, "Failed to open file: %s.\n", path);
+               return -1;
+       }
+
+       ret = read(fd, old_carrier, 2);
+       if (ret < 1) {
+               close(fd);
+               return -1;
+       }
+       old_linkup = (old_carrier[0] == '1');
+
+       new_carrier = linkup ? "1" : "0";
+       ret = write(fd, new_carrier, 1);
+       if (ret < 1) {
+               RTE_LOG(ERR, KNI, "Failed to write file: %s.\n", path);
+               close(fd);
+               return -1;
+       }
+
+       close(fd);
+       return old_linkup;
+}
+
 void
 rte_kni_close(void)
 {