New upstream version 18.08

[deb_dpdk.git] / drivers / net / softnic / rte_eth_softnic_tap.c

diff --git a/drivers/net/softnic/rte_eth_softnic_tap.c b/drivers/net/softnic/rte_eth_softnic_tap.c
new file mode 100644 (file)
index 0000000..bcc23a9
--- /dev/null
+++ b/drivers/net/softnic/rte_eth_softnic_tap.c
@@ -0,0 +1,118 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2018 Intel Corporation
+ */
+
+#include <netinet/in.h>
+#ifdef RTE_EXEC_ENV_LINUXAPP
+#include <linux/if.h>
+#include <linux/if_tun.h>
+#endif
+#include <sys/ioctl.h>
+
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <rte_string_fns.h>
+
+#include "rte_eth_softnic_internals.h"
+
+#define TAP_DEV                                            "/dev/net/tun"
+
+int
+softnic_tap_init(struct pmd_internals *p)
+{
+       TAILQ_INIT(&p->tap_list);
+
+       return 0;
+}
+
+void
+softnic_tap_free(struct pmd_internals *p)
+{
+       for ( ; ; ) {
+               struct softnic_tap *tap;
+
+               tap = TAILQ_FIRST(&p->tap_list);
+               if (tap == NULL)
+                       break;
+
+               TAILQ_REMOVE(&p->tap_list, tap, node);
+               free(tap);
+       }
+}
+
+struct softnic_tap *
+softnic_tap_find(struct pmd_internals *p,
+       const char *name)
+{
+       struct softnic_tap *tap;
+
+       if (name == NULL)
+               return NULL;
+
+       TAILQ_FOREACH(tap, &p->tap_list, node)
+               if (strcmp(tap->name, name) == 0)
+                       return tap;
+
+       return NULL;
+}
+
+#ifndef RTE_EXEC_ENV_LINUXAPP
+
+struct softnic_tap *
+softnic_tap_create(struct pmd_internals *p __rte_unused,
+       const char *name __rte_unused)
+{
+       return NULL;
+}
+
+#else
+
+struct softnic_tap *
+softnic_tap_create(struct pmd_internals *p,
+       const char *name)
+{
+       struct softnic_tap *tap;
+       struct ifreq ifr;
+       int fd, status;
+
+       /* Check input params */
+       if (name == NULL ||
+               softnic_tap_find(p, name))
+               return NULL;
+
+       /* Resource create */
+       fd = open(TAP_DEV, O_RDWR | O_NONBLOCK);
+       if (fd < 0)
+               return NULL;
+
+       memset(&ifr, 0, sizeof(ifr));
+       ifr.ifr_flags = IFF_TAP | IFF_NO_PI; /* No packet information */
+       snprintf(ifr.ifr_name, IFNAMSIZ, "%s", name);
+
+       status = ioctl(fd, TUNSETIFF, (void *)&ifr);
+       if (status < 0) {
+               close(fd);
+               return NULL;
+       }
+
+       /* Node allocation */
+       tap = calloc(1, sizeof(struct softnic_tap));
+       if (tap == NULL) {
+               close(fd);
+               return NULL;
+       }
+       /* Node fill in */
+       strlcpy(tap->name, name, sizeof(tap->name));
+       tap->fd = fd;
+
+       /* Node add to list */
+       TAILQ_INSERT_TAIL(&p->tap_list, tap, node);
+
+       return tap;
+}
+
+#endif