Added nologic vale-bpf program

apps/nologic/GNUMakefile

@@ -0,0 +1,7 @@
+BASE=	../..
+include ${BASE}/Makefile.inc
+include Makefile.common
+clean: afterclean
+afterclean:
+	for D in ${SUBDIR}; do (cd $$D && make clean); done
+.PHONY: afterclean

apps/nologic/Makefile

@@ -0,0 +1,9 @@
+BASE=	../..
+.include "${BASE}/Makefile.inc"
+.include "Makefile.common"
+.if defined(SUBDIR) && !empty(SUBDIR)
+clean: afterclean
+afterclean:
+	for D in ${SUBDIR}; do (cd $$D && make clean); done
+.PHONY: afterclean
+.endif

apps/nologic/Makefile.common

@@ -0,0 +1,23 @@
+PROG=	nologic_loader
+SRCS=	nologic_loader.c
+OBJS=	${SRCS:.c=.o}
+EBPFSRCS=	nologic.bpf.c
+EBPFOBJS=	${EBPFSRCS:.c=.o}
+CFLAGS+=	\
+	-O3 \
+	-I ${BASE}/sys \
+	-Wall
+LIBS+= \
+	-lgbpf \
+	-lelf \
+
+all: ${PROG} ${EBPFOBJS}
+
+${EBPFOBJS}: ${EBPFSRCS}
+	clang $(CFLAGS) -target bpf -c nologic.bpf.c
+
+${PROG}: ${OBJS}
+	$(CC) $(CFLAGS) -o $@ $(OBJS) $(LIBS)
+CLEANFILES+=	${PROG} ${OBJS} ${EBPFOBJS}
+
+install:

apps/nologic/nologic.bpf.c

@@ -0,0 +1,26 @@
+/*-
+ * SPDX-License-Identifier: Apache License 2.0
+ *
+ * Copyright 2017-2018 Yutaro Hayakawa
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdint.h>
+#include <net/vale_bpf_uapi.h>
+
+uint32_t
+no_logic(struct vale_bpf_md *md)
+{
+	return 1;
+}

apps/nologic/nologic_loader.c

@@ -0,0 +1,133 @@
+/*-
+ * SPDX-License-Identifier: Apache License 2.0
+ *
+ * Copyright 2017-2018 Yutaro Hayakawa
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <signal.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <net/if.h>
+#include <sys/ioctl.h>
+
+#include <sys/ebpf.h>
+#include <sys/ebpf_uapi.h>
+#include <sys/ebpf_inst.h>
+#include <sys/ebpf_dev.h>
+#include <net/vale_bpf.h>
+#include <gbpf/gbpf.h>
+
+#include "../utils/vale_bpf_elf_loader.h"
+
+static int end = 0;
+static char *vale_name = NULL;
+
+static void
+on_sigint(int sig)
+{
+  end = 1;
+}
+
+#define PROG_NAME "nologic.bpf.o"
+
+static void
+usage(void) {
+	printf("Usage: ./nologic_loader -v <vale_name>\n");
+	exit(EXIT_FAILURE);
+}
+
+int
+main(int argc, char **argv)
+{
+  int opt, nmfd, error;
+  size_t len;
+
+  while ((opt = getopt(argc, argv, "v:")) != -1) {
+	  switch (opt) {
+		case 'v':
+			len = strlen(optarg);
+			vale_name = malloc(len + 2);
+			if (vale_name == NULL) {
+				perror("malloc");
+				usage();
+			}
+			strcpy(vale_name, optarg);
+			vale_name[len] = ':';
+			vale_name[len + 1] = '\0';
+			break;
+		default:
+			usage();
+	  }
+  }
+
+  if (vale_name == NULL) {
+	  usage();
+  }
+
+  nmfd = open("/dev/netmap", O_RDWR);
+  if (nmfd < 0) {
+    perror("open /dev/netmap");
+    exit(EXIT_FAILURE);
+  }
+
+  struct vale_bpf_info *info;
+  info = vale_bpf_load_elf_start("./" PROG_NAME);
+  if (!info) {
+    printf("Failed to load " PROG_NAME "\n");
+    exit(EXIT_FAILURE);
+  }
+
+  if (info->nprog == 0) {
+    printf("There is no program in " PROG_NAME "\n");
+    exit(EXIT_FAILURE);
+  }
+
+  int progfd = gbpf_load_prog((GBPFDriver *)info->driver,
+		  EBPF_PROG_TYPE_TEST, info->progs[0].prog,
+		  info->progs[0].prog_len);
+  if (progfd < 0) {
+	  perror("gbpf_load_prog");
+	  exit(EXIT_FAILURE);
+  }
+
+  error = vale_bpf_load_prog(nmfd, vale_name, progfd);
+  if (error) {
+    printf("Failed to load program to %s\n", vale_name);
+    exit(EXIT_FAILURE);
+  }
+
+  signal(SIGINT, on_sigint);
+
+  printf("Running nologic program on vale0, press Ctrl-C to finish\n");
+  while (!end) {
+    sleep(1);
+  }
+
+  error = vale_bpf_unload_prog(nmfd, vale_name);
+  if (error) {
+    printf("Failed to unload program from %s\n", vale_name);
+    exit(EXIT_FAILURE);
+  }
+
+  vale_bpf_load_elf_done(info);
+  close(nmfd);
+  free(vale_name);
+
+  return EXIT_SUCCESS;
+}