Add memif - packet memory interface for intra-host communication

Change-Id: I94c06b07a39f07ceba87bf3e7fcfc70e43231e8a
Signed-off-by: Damjan Marion <damarion@cisco.com>
Co-Authored-By: Milan Lenco <Milan.Lenco@pantheon.tech>

1 files changed, 202 insertions, 0 deletions

diff --git a/src/plugins/memif/cli.c b/src/plugins/memif/cli.c
new file mode 100644
index 00000000..ef73693b
--- /dev/null
+++ b/src/plugins/memif/cli.c
@@ -0,0 +1,202 @@
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * 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/if.h>
+#include <sys/ioctl.h>
+#include <inttypes.h>
+
+#include <vlib/vlib.h>
+#include <vlib/unix/unix.h>
+#include <vnet/ethernet/ethernet.h>
+
+#include <memif/memif.h>
+
+static clib_error_t *
+memif_create_command_fn (vlib_main_t * vm, unformat_input_t * input,
+			 vlib_cli_command_t * cmd)
+{
+  unformat_input_t _line_input, *line_input = &_line_input;
+  int r;
+  u32 ring_size = MEMIF_DEFAULT_RING_SIZE;
+  memif_create_if_args_t args = { 0 };
+  args.buffer_size = MEMIF_DEFAULT_BUFFER_SIZE;
+
+  /* Get a line of input. */
+  if (!unformat_user (input, unformat_line_input, line_input))
+    return 0;
+
+  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (line_input, "key 0x%" PRIx64, &args.key))
+	;
+      else if (unformat (line_input, "socket %s", &args.socket_filename))
+	;
+      else if (unformat (line_input, "ring-size %u", &ring_size))
+	;
+      else if (unformat (line_input, "buffer-size %u", &args.buffer_size))
+	;
+      else if (unformat (line_input, "master"))
+	args.is_master = 1;
+      else if (unformat (line_input, "slave"))
+	args.is_master = 0;
+      else if (unformat (line_input, "hw-addr %U",
+			 unformat_ethernet_address, args.hw_addr))
+	args.hw_addr_set = 1;
+      else
+	return clib_error_return (0, "unknown input `%U'",
+				  format_unformat_error, input);
+    }
+  unformat_free (line_input);
+
+  if (!is_pow2 (ring_size))
+    return clib_error_return (0, "ring size must be power of 2");
+
+  args.log2_ring_size = min_log2 (ring_size);
+
+  r = memif_create_if (vm, &args);
+
+  if (r <= VNET_API_ERROR_SYSCALL_ERROR_1
+      && r >= VNET_API_ERROR_SYSCALL_ERROR_10)
+    return clib_error_return (0, "%s (errno %d)", strerror (errno), errno);
+
+  if (r == VNET_API_ERROR_INVALID_INTERFACE)
+    return clib_error_return (0, "Invalid interface name");
+
+  if (r == VNET_API_ERROR_SUBIF_ALREADY_EXISTS)
+    return clib_error_return (0, "Interface already exists");
+
+  return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (memif_create_command, static) = {
+  .path = "create memif",
+  .short_help = "create memif [key <key>] [socket <path>] "
+                "[ring-size <size>] [buffer-size <size>] [hw-addr <mac-address>] "
+		"<master|slave>",
+  .function = memif_create_command_fn,
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+memif_delete_command_fn (vlib_main_t * vm, unformat_input_t * input,
+			 vlib_cli_command_t * cmd)
+{
+  unformat_input_t _line_input, *line_input = &_line_input;
+  u64 key = 0;
+  u8 key_defined = 0;
+
+  /* Get a line of input. */
+  if (!unformat_user (input, unformat_line_input, line_input))
+    return 0;
+
+  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (line_input, "key 0x%" PRIx64, &key))
+	key_defined = 1;
+      else
+	return clib_error_return (0, "unknown input `%U'",
+				  format_unformat_error, input);
+    }
+  unformat_free (line_input);
+
+  if (!key_defined)
+    return clib_error_return (0, "missing key");
+
+  memif_delete_if (vm, key);
+
+  return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (memif_delete_command, static) = {
+  .path = "delete memif",
+  .short_help = "delete memif key <key-value>",
+  .function = memif_delete_command_fn,
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+memif_show_command_fn (vlib_main_t * vm, unformat_input_t * input,
+		       vlib_cli_command_t * cmd)
+{
+  memif_main_t *mm = &memif_main;
+  memif_if_t *mif;
+  vnet_main_t *vnm = vnet_get_main ();
+  int i;
+
+  /* *INDENT-OFF* */
+  pool_foreach (mif, mm->interfaces,
+    ({
+       vlib_cli_output (vm, "interface %U", format_vnet_sw_if_index_name,
+			vnm, mif->sw_if_index);
+       vlib_cli_output (vm, "  key 0x%" PRIx64 " file %s", mif->key,
+			mif->socket_filename);
+       vlib_cli_output (vm, "  listener %d conn-fd %d int-fd %d", mif->listener_index,
+			mif->connection.fd, mif->interrupt_line.fd);
+       vlib_cli_output (vm, "  ring-size %u num-c2s-rings %u num-s2c-rings %u buffer_size %u",
+			(1 << mif->log2_ring_size),
+			mif->num_s2m_rings,
+			mif->num_m2s_rings,
+			mif->buffer_size);
+       for (i=0; i < mif->num_s2m_rings; i++)
+         {
+	   memif_ring_t * ring = memif_get_ring (mif, MEMIF_RING_S2M, i);
+	   if (ring)
+	     {
+	       vlib_cli_output (vm, "  slave-to-master ring %u:", i);
+	       vlib_cli_output (vm, "    head %u tail %u", ring->head, ring->tail);
+	     }
+	 }
+       for (i=0; i < mif->num_m2s_rings; i++)
+         {
+	   memif_ring_t * ring = memif_get_ring (mif, MEMIF_RING_M2S, i);
+	   if (ring)
+	     {
+	       vlib_cli_output (vm, "  master-to-slave ring %u:", i);
+	       vlib_cli_output (vm, "    head %u tail %u", ring->head, ring->tail);
+	     }
+	 }
+    }));
+  /* *INDENT-ON* */
+
+  return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (memif_show_command, static) = {
+  .path = "show memif",
+  .short_help = "show memif",
+  .function = memif_show_command_fn,
+};
+/* *INDENT-ON* */
+
+clib_error_t *
+memif_cli_init (vlib_main_t * vm)
+{
+  return 0;
+}
+
+VLIB_INIT_FUNCTION (memif_cli_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */