FD.io VPP  v17.07.01-10-g3be13f0
Vector Packet Processing
cli.c
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1 /*
2  *------------------------------------------------------------------
3  * Copyright (c) 2016 Cisco and/or its affiliates.
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at:
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  *------------------------------------------------------------------
16  */
17 #include <stdint.h>
18 #include <net/if.h>
19 #include <sys/ioctl.h>
20 
21 #include <vlib/vlib.h>
22 #include <vlib/unix/unix.h>
23 #include <vnet/ethernet/ethernet.h>
24 
27 
28 static clib_error_t *
30  vlib_cli_command_t * cmd)
31 {
32  unformat_input_t _line_input, *line_input = &_line_input;
33  u8 *host_if_name = NULL;
34  u8 hwaddr[6];
35  u8 *hw_addr_ptr = 0;
36  int r;
37  u8 is_pipe = 0;
38  u8 is_master = 0;
39  u32 sw_if_index = ~0;
40  clib_error_t *error = NULL;
41 
42  /* Get a line of input. */
43  if (!unformat_user (input, unformat_line_input, line_input))
44  return 0;
45 
46  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
47  {
48  if (unformat (line_input, "name %s", &host_if_name))
49  ;
50  else
51  if (unformat
52  (line_input, "hw-addr %U", unformat_ethernet_address, hwaddr))
53  hw_addr_ptr = hwaddr;
54  else if (unformat (line_input, "pipe"))
55  is_pipe = 1;
56  else if (unformat (line_input, "master"))
57  is_master = 1;
58  else if (unformat (line_input, "slave"))
59  is_master = 0;
60  else
61  {
62  error = clib_error_return (0, "unknown input `%U'",
63  format_unformat_error, line_input);
64  goto done;
65  }
66  }
67 
68  if (host_if_name == NULL)
69  {
70  error = clib_error_return (0, "missing host interface name");
71  goto done;
72  }
73 
74  r =
75  netmap_create_if (vm, host_if_name, hw_addr_ptr, is_pipe, is_master,
76  &sw_if_index);
77 
78  if (r == VNET_API_ERROR_SYSCALL_ERROR_1)
79  {
80  error = clib_error_return (0, "%s (errno %d)", strerror (errno), errno);
81  goto done;
82  }
83 
84  if (r == VNET_API_ERROR_INVALID_INTERFACE)
85  {
86  error = clib_error_return (0, "Invalid interface name");
87  goto done;
88  }
89 
90  if (r == VNET_API_ERROR_SUBIF_ALREADY_EXISTS)
91  {
92  error = clib_error_return (0, "Interface already exists");
93  goto done;
94  }
95 
97  sw_if_index);
98 
99 done:
100  unformat_free (line_input);
101 
102  return error;
103 }
104 
105 /*?
106  * '<em>netmap</em>' is a framework for very fast packet I/O from userspace.
107  * '<em>VALE</em>' is an equally fast in-kernel software switch using the
108  * netmap API. '<em>netmap</em>' includes '<em>netmap pipes</em>', a shared
109  * memory packet transport channel. Together, they provide a high speed
110  * user-space interface that allows VPP to patch into a linux namespace, a
111  * linux container, or a physical NIC without the use of DPDK. Netmap/VALE
112  * generates the '<em>netmap.ko</em>' kernel module that needs to be loaded
113  * before netmap interfaces can be created.
114  * - https://github.com/luigirizzo/netmap - Netmap/VALE repo.
115  * - https://github.com/vpp-dev/netmap - VPP development package for Netmap/VALE,
116  * which is a snapshot of the Netmap/VALE repo with minor changes to work
117  * with containers and modified kernel drivers to work with NICs.
118  *
119  * Create a netmap interface that will attach to a linux interface.
120  * The interface must already exist. Once created, a new netmap interface
121  * will exist in VPP with the name '<em>netmap-<ifname></em>', where
122  * '<em><ifname></em>' takes one of two forms:
123  * - <b>ifname</b> - Linux interface to bind too.
124  * - <b>valeXXX:YYY</b> -
125  * - Where '<em>valeXXX</em>' is an arbitrary name for a VALE
126  * interface that must start with '<em>vale</em>' and is less
127  * than 16 characters.
128  * - Where '<em>YYY</em>' is an existing linux namespace.
129  *
130  * This command has the following optional parameters:
131  *
132  * - <b>hw-addr <mac-addr></b> - Optional ethernet address, can be in either
133  * X:X:X:X:X:X unix or X.X.X cisco format.
134  *
135  * - <b>pipe</b> - Optional flag to indicate that a '<em>netmap pipe</em>'
136  * instance should be created.
137  *
138  * - <b>master | slave</b> - Optional flag to indicate whether VPP should
139  * be the master or slave of the '<em>netmap pipe</em>'. Only considered
140  * if '<em>pipe</em>' is entered. Defaults to '<em>slave</em>' if not entered.
141  *
142  * @cliexpar
143  * Example of how to create a netmap interface tied to the linux
144  * namespace '<em>vpp1</em>':
145  * @cliexstart{create netmap name vale00:vpp1 hw-addr 02:FE:3F:34:15:9B pipe master}
146  * netmap-vale00:vpp1
147  * @cliexend
148  * Once the netmap interface is created, enable the interface using:
149  * @cliexcmd{set interface state netmap-vale00:vpp1 up}
150 ?*/
151 /* *INDENT-OFF* */
152 VLIB_CLI_COMMAND (netmap_create_command, static) = {
153  .path = "create netmap",
154  .short_help = "create netmap name <ifname>|valeXXX:YYY "
155  "[hw-addr <mac-addr>] [pipe] [master|slave]",
156  .function = netmap_create_command_fn,
157 };
158 /* *INDENT-ON* */
159 
160 static clib_error_t *
162  vlib_cli_command_t * cmd)
163 {
164  unformat_input_t _line_input, *line_input = &_line_input;
165  u8 *host_if_name = NULL;
166  clib_error_t *error = NULL;
167 
168  /* Get a line of input. */
169  if (!unformat_user (input, unformat_line_input, line_input))
170  return 0;
171 
172  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
173  {
174  if (unformat (line_input, "name %s", &host_if_name))
175  ;
176  else
177  {
178  error = clib_error_return (0, "unknown input `%U'",
179  format_unformat_error, line_input);
180  goto done;
181  }
182  }
183 
184  if (host_if_name == NULL)
185  {
186  error = clib_error_return (0, "missing host interface name");
187  goto done;
188  }
189 
190  netmap_delete_if (vm, host_if_name);
191 
192 done:
193  unformat_free (line_input);
194 
195  return error;
196 }
197 
198 /*?
199  * Delete a netmap interface. Use the '<em><ifname></em>' to identify
200  * the netmap interface to be deleted. In VPP, netmap interfaces are
201  * named as '<em>netmap-<ifname></em>', where '<em><ifname></em>'
202  * takes one of two forms:
203  * - <b>ifname</b> - Linux interface to bind too.
204  * - <b>valeXXX:YYY</b> -
205  * - Where '<em>valeXXX</em>' is an arbitrary name for a VALE
206  * interface that must start with '<em>vale</em>' and is less
207  * than 16 characters.
208  * - Where '<em>YYY</em>' is an existing linux namespace.
209  *
210  * @cliexpar
211  * Example of how to delete a netmap interface named '<em>netmap-vale00:vpp1</em>':
212  * @cliexcmd{delete netmap name vale00:vpp1}
213 ?*/
214 /* *INDENT-OFF* */
215 VLIB_CLI_COMMAND (netmap_delete_command, static) = {
216  .path = "delete netmap",
217  .short_help = "delete netmap name <ifname>|valeXXX:YYY",
218  .function = netmap_delete_command_fn,
219 };
220 /* *INDENT-ON* */
221 
222 clib_error_t *
224 {
225  return 0;
226 }
227 
229 
230 /*
231  * fd.io coding-style-patch-verification: ON
232  *
233  * Local Variables:
234  * eval: (c-set-style "gnu")
235  * End:
236  */
clib_error_t * netmap_cli_init(vlib_main_t *vm)
Definition: cli.c:223
vnet_main_t * vnet_get_main(void)
Definition: misc.c:46
#define NULL
Definition: clib.h:55
uword unformat_user(unformat_input_t *input, unformat_function_t *func,...)
Definition: unformat.c:983
format_function_t format_vnet_sw_if_index_name
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:111
#define clib_error_return(e, args...)
Definition: error.h:99
unformat_function_t unformat_line_input
Definition: format.h:281
struct _unformat_input_t unformat_input_t
#define UNFORMAT_END_OF_INPUT
Definition: format.h:143
static clib_error_t * netmap_delete_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: cli.c:161
int netmap_create_if(vlib_main_t *vm, u8 *if_name, u8 *hw_addr_set, u8 is_pipe, u8 is_master, u32 *sw_if_index)
Definition: netmap.c:113
#define VLIB_CLI_COMMAND(x,...)
Definition: cli.h:154
uword unformat_ethernet_address(unformat_input_t *input, va_list *args)
Definition: format.c:227
unsigned int u32
Definition: types.h:88
unsigned char u8
Definition: types.h:56
static void unformat_free(unformat_input_t *i)
Definition: format.h:161
u8 * format_unformat_error(u8 *s, va_list *va)
Definition: unformat.c:91
void vlib_cli_output(vlib_main_t *vm, char *fmt,...)
Definition: cli.c:680
static clib_error_t * netmap_create_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: cli.c:29
uword unformat(unformat_input_t *i, const char *fmt,...)
Definition: unformat.c:972
static uword unformat_check_input(unformat_input_t *i)
Definition: format.h:169
int netmap_delete_if(vlib_main_t *vm, u8 *host_if_name)
Definition: netmap.c:244