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Damjan Marion83243a02016-02-29 13:09:30 +01001/*
2 *------------------------------------------------------------------
3 * af_packet.c - linux kernel packet interface
4 *
5 * Copyright (c) 2016 Cisco and/or its affiliates.
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at:
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 *------------------------------------------------------------------
18 */
19
20#include <linux/if_ether.h>
21#include <linux/if_packet.h>
Mohsin Kazmia50a14c2018-04-25 15:58:05 +020022#include <sys/ioctl.h>
23#include <net/if.h>
Ray Kinsellac855b732017-04-21 12:24:43 +010024#include <dirent.h>
Ray Kinsella7bfa1192017-05-15 11:52:43 +010025#include <sys/stat.h>
26#include <sys/types.h>
27#include <fcntl.h>
Damjan Marion83243a02016-02-29 13:09:30 +010028
Damjan Marion01914ce2017-09-14 19:04:50 +020029#include <vppinfra/linux/sysfs.h>
Damjan Marion83243a02016-02-29 13:09:30 +010030#include <vlib/vlib.h>
31#include <vlib/unix/unix.h>
32#include <vnet/ip/ip.h>
33#include <vnet/ethernet/ethernet.h>
34
35#include <vnet/devices/af_packet/af_packet.h>
36
Dave Wallace71612d62017-10-24 01:32:41 -040037af_packet_main_t af_packet_main;
38
Damjan Marion83243a02016-02-29 13:09:30 +010039#define AF_PACKET_TX_FRAMES_PER_BLOCK 1024
40#define AF_PACKET_TX_FRAME_SIZE (2048 * 5)
41#define AF_PACKET_TX_BLOCK_NR 1
42#define AF_PACKET_TX_FRAME_NR (AF_PACKET_TX_BLOCK_NR * \
43 AF_PACKET_TX_FRAMES_PER_BLOCK)
44#define AF_PACKET_TX_BLOCK_SIZE (AF_PACKET_TX_FRAME_SIZE * \
45 AF_PACKET_TX_FRAMES_PER_BLOCK)
46
47#define AF_PACKET_RX_FRAMES_PER_BLOCK 1024
48#define AF_PACKET_RX_FRAME_SIZE (2048 * 5)
49#define AF_PACKET_RX_BLOCK_NR 1
50#define AF_PACKET_RX_FRAME_NR (AF_PACKET_RX_BLOCK_NR * \
51 AF_PACKET_RX_FRAMES_PER_BLOCK)
52#define AF_PACKET_RX_BLOCK_SIZE (AF_PACKET_RX_FRAME_SIZE * \
53 AF_PACKET_RX_FRAMES_PER_BLOCK)
54
Damjan Marion83243a02016-02-29 13:09:30 +010055/*defined in net/if.h but clashes with dpdk headers */
Damjan Marion00a9dca2016-08-17 17:05:46 +020056unsigned int if_nametoindex (const char *ifname);
Damjan Marion83243a02016-02-29 13:09:30 +010057
58typedef struct tpacket_req tpacket_req_t;
59
60static u32
Damjan Marion00a9dca2016-08-17 17:05:46 +020061af_packet_eth_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hi,
62 u32 flags)
Damjan Marion83243a02016-02-29 13:09:30 +010063{
Ray Kinsella7bfa1192017-05-15 11:52:43 +010064 clib_error_t *error;
65 u8 *s;
66 af_packet_main_t *apm = &af_packet_main;
67 af_packet_if_t *apif =
68 pool_elt_at_index (apm->interfaces, hi->dev_instance);
69
70 if (ETHERNET_INTERFACE_FLAG_MTU == (flags & ETHERNET_INTERFACE_FLAG_MTU))
71 {
72 s = format (0, "/sys/class/net/%s/mtu%c", apif->host_if_name, 0);
73
Damjan Marion01914ce2017-09-14 19:04:50 +020074 error = clib_sysfs_write ((char *) s, "%d", hi->max_packet_bytes);
Ray Kinsella7bfa1192017-05-15 11:52:43 +010075 vec_free (s);
76
77 if (error)
78 {
Mohsin Kazmiacba9f72018-05-17 15:42:27 +020079 vlib_log_err (apm->log_class,
80 "sysfs write failed to change MTU: %U",
81 format_clib_error, error);
82 clib_error_free (error);
Ray Kinsella7bfa1192017-05-15 11:52:43 +010083 return VNET_API_ERROR_SYSCALL_ERROR_1;
84 }
85 }
86
Damjan Marion83243a02016-02-29 13:09:30 +010087 return 0;
88}
89
Damjan Marion00a9dca2016-08-17 17:05:46 +020090static clib_error_t *
Damjan Marion56dd5432017-09-08 19:52:02 +020091af_packet_fd_read_ready (clib_file_t * uf)
Damjan Marion83243a02016-02-29 13:09:30 +010092{
Damjan Marion00a9dca2016-08-17 17:05:46 +020093 af_packet_main_t *apm = &af_packet_main;
Damjan Marioneb743fa2017-03-20 16:34:15 +010094 vnet_main_t *vnm = vnet_get_main ();
Damjan Marion83243a02016-02-29 13:09:30 +010095 u32 idx = uf->private_data;
Damjan Marioneb743fa2017-03-20 16:34:15 +010096 af_packet_if_t *apif = pool_elt_at_index (apm->interfaces, idx);
Damjan Marion83243a02016-02-29 13:09:30 +010097
Damjan Marion00a9dca2016-08-17 17:05:46 +020098 apm->pending_input_bitmap =
99 clib_bitmap_set (apm->pending_input_bitmap, idx, 1);
Damjan Marion83243a02016-02-29 13:09:30 +0100100
101 /* Schedule the rx node */
Damjan Marioneb743fa2017-03-20 16:34:15 +0100102 vnet_device_input_set_interrupt_pending (vnm, apif->hw_if_index, 0);
Damjan Marion83243a02016-02-29 13:09:30 +0100103
104 return 0;
105}
106
107static int
Ray Kinsellac855b732017-04-21 12:24:43 +0100108is_bridge (const u8 * host_if_name)
109{
110 u8 *s;
111 DIR *dir = NULL;
112
113 s = format (0, "/sys/class/net/%s/bridge%c", host_if_name, 0);
114 dir = opendir ((char *) s);
115 vec_free (s);
116
117 if (dir)
118 {
119 closedir (dir);
120 return 0;
121 }
122
123 return -1;
124}
125
126static int
127create_packet_v2_sock (int host_if_index, tpacket_req_t * rx_req,
Damjan Marion00a9dca2016-08-17 17:05:46 +0200128 tpacket_req_t * tx_req, int *fd, u8 ** ring)
Damjan Marion83243a02016-02-29 13:09:30 +0100129{
Mohsin Kazmiacba9f72018-05-17 15:42:27 +0200130 af_packet_main_t *apm = &af_packet_main;
Damjan Marion83243a02016-02-29 13:09:30 +0100131 int ret, err;
132 struct sockaddr_ll sll;
Damjan Marion83243a02016-02-29 13:09:30 +0100133 int ver = TPACKET_V2;
Damjan Marion00a9dca2016-08-17 17:05:46 +0200134 socklen_t req_sz = sizeof (struct tpacket_req);
Damjan Marion83243a02016-02-29 13:09:30 +0100135 u32 ring_sz = rx_req->tp_block_size * rx_req->tp_block_nr +
Damjan Marion00a9dca2016-08-17 17:05:46 +0200136 tx_req->tp_block_size * tx_req->tp_block_nr;
Damjan Marion83243a02016-02-29 13:09:30 +0100137
Damjan Marion00a9dca2016-08-17 17:05:46 +0200138 if ((*fd = socket (AF_PACKET, SOCK_RAW, htons (ETH_P_ALL))) < 0)
Damjan Marion83243a02016-02-29 13:09:30 +0100139 {
Mohsin Kazmiacba9f72018-05-17 15:42:27 +0200140 vlib_log_debug (apm->log_class, "Failed to create socket");
Damjan Marion83243a02016-02-29 13:09:30 +0100141 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
142 goto error;
143 }
Damjan Marionc5170202017-10-11 14:15:47 +0200144
Chaoyu Jinafb19302018-03-13 07:37:41 -0700145 /* bind before rx ring is cfged so we don't receive packets from other interfaces */
146 memset (&sll, 0, sizeof (sll));
147 sll.sll_family = PF_PACKET;
148 sll.sll_protocol = htons (ETH_P_ALL);
149 sll.sll_ifindex = host_if_index;
150 if ((err = bind (*fd, (struct sockaddr *) &sll, sizeof (sll))) < 0)
151 {
Mohsin Kazmiacba9f72018-05-17 15:42:27 +0200152 vlib_log_debug (apm->log_class,
153 "Failed to bind rx packet socket (error %d)", err);
Chaoyu Jinafb19302018-03-13 07:37:41 -0700154 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
155 goto error;
156 }
157
Damjan Marion00a9dca2016-08-17 17:05:46 +0200158 if ((err =
159 setsockopt (*fd, SOL_PACKET, PACKET_VERSION, &ver, sizeof (ver))) < 0)
Damjan Marion83243a02016-02-29 13:09:30 +0100160 {
Mohsin Kazmiacba9f72018-05-17 15:42:27 +0200161 vlib_log_debug (apm->log_class,
162 "Failed to set rx packet interface version");
Damjan Marion83243a02016-02-29 13:09:30 +0100163 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
164 goto error;
165 }
166
Damjan Marionc5170202017-10-11 14:15:47 +0200167 int opt = 1;
Damjan Marion00a9dca2016-08-17 17:05:46 +0200168 if ((err =
169 setsockopt (*fd, SOL_PACKET, PACKET_LOSS, &opt, sizeof (opt))) < 0)
Damjan Marion83243a02016-02-29 13:09:30 +0100170 {
Mohsin Kazmiacba9f72018-05-17 15:42:27 +0200171 vlib_log_debug (apm->log_class,
172 "Failed to set packet tx ring error handling option");
Damjan Marion83243a02016-02-29 13:09:30 +0100173 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
174 goto error;
175 }
176
Damjan Marion00a9dca2016-08-17 17:05:46 +0200177 if ((err =
178 setsockopt (*fd, SOL_PACKET, PACKET_RX_RING, rx_req, req_sz)) < 0)
Damjan Marion83243a02016-02-29 13:09:30 +0100179 {
Mohsin Kazmiacba9f72018-05-17 15:42:27 +0200180 vlib_log_debug (apm->log_class, "Failed to set packet rx ring options");
Damjan Marion83243a02016-02-29 13:09:30 +0100181 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
182 goto error;
183 }
184
Damjan Marion00a9dca2016-08-17 17:05:46 +0200185 if ((err =
186 setsockopt (*fd, SOL_PACKET, PACKET_TX_RING, tx_req, req_sz)) < 0)
Damjan Marion83243a02016-02-29 13:09:30 +0100187 {
Mohsin Kazmiacba9f72018-05-17 15:42:27 +0200188 vlib_log_debug (apm->log_class, "Failed to set packet tx ring options");
Damjan Marion83243a02016-02-29 13:09:30 +0100189 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
190 goto error;
191 }
192
Damjan Marion00a9dca2016-08-17 17:05:46 +0200193 *ring =
194 mmap (NULL, ring_sz, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_LOCKED, *fd,
195 0);
Damjan Marion83243a02016-02-29 13:09:30 +0100196 if (*ring == MAP_FAILED)
197 {
Mohsin Kazmiacba9f72018-05-17 15:42:27 +0200198 vlib_log_debug (apm->log_class, "mmap failure");
Damjan Marion83243a02016-02-29 13:09:30 +0100199 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
200 goto error;
201 }
202
Damjan Marion83243a02016-02-29 13:09:30 +0100203 return 0;
204error:
Dave Barach16ad6ae2016-07-28 17:55:30 -0400205 if (*fd >= 0)
Damjan Marion00a9dca2016-08-17 17:05:46 +0200206 close (*fd);
Peter Leidba76f22016-04-08 08:16:31 -0700207 *fd = -1;
Damjan Marion83243a02016-02-29 13:09:30 +0100208 return ret;
209}
210
211int
Damjan Marion00a9dca2016-08-17 17:05:46 +0200212af_packet_create_if (vlib_main_t * vm, u8 * host_if_name, u8 * hw_addr_set,
213 u32 * sw_if_index)
Damjan Marion83243a02016-02-29 13:09:30 +0100214{
Damjan Marion00a9dca2016-08-17 17:05:46 +0200215 af_packet_main_t *apm = &af_packet_main;
Mohsin Kazmia50a14c2018-04-25 15:58:05 +0200216 int ret, fd = -1, fd2 = -1;
Damjan Marion00a9dca2016-08-17 17:05:46 +0200217 struct tpacket_req *rx_req = 0;
218 struct tpacket_req *tx_req = 0;
Mohsin Kazmia50a14c2018-04-25 15:58:05 +0200219 struct ifreq ifr;
Damjan Marion00a9dca2016-08-17 17:05:46 +0200220 u8 *ring = 0;
221 af_packet_if_t *apif = 0;
Damjan Marion83243a02016-02-29 13:09:30 +0100222 u8 hw_addr[6];
Damjan Marion00a9dca2016-08-17 17:05:46 +0200223 clib_error_t *error;
224 vnet_sw_interface_t *sw;
Damjan Marion44036902017-04-28 12:29:15 +0200225 vnet_hw_interface_t *hw;
Mohsin KAZMIcf751ec2017-01-18 11:59:45 +0100226 vlib_thread_main_t *tm = vlib_get_thread_main ();
Damjan Marion00a9dca2016-08-17 17:05:46 +0200227 vnet_main_t *vnm = vnet_get_main ();
228 uword *p;
Damjan Marion83243a02016-02-29 13:09:30 +0100229 uword if_index;
Ivan Kellybfe737a2016-10-07 18:02:43 +0200230 u8 *host_if_name_dup = vec_dup (host_if_name);
Ray Kinsellac855b732017-04-21 12:24:43 +0100231 int host_if_index = -1;
Damjan Marion83243a02016-02-29 13:09:30 +0100232
233 p = mhash_get (&apm->if_index_by_host_if_name, host_if_name);
234 if (p)
235 {
Mohsin Kazmi43fc6882018-03-22 23:45:23 +0100236 apif = vec_elt_at_index (apm->interfaces, p[0]);
237 *sw_if_index = apif->sw_if_index;
238 return VNET_API_ERROR_IF_ALREADY_EXISTS;
Damjan Marion83243a02016-02-29 13:09:30 +0100239 }
240
Damjan Marion00a9dca2016-08-17 17:05:46 +0200241 vec_validate (rx_req, 0);
Damjan Marion83243a02016-02-29 13:09:30 +0100242 rx_req->tp_block_size = AF_PACKET_RX_BLOCK_SIZE;
243 rx_req->tp_frame_size = AF_PACKET_RX_FRAME_SIZE;
244 rx_req->tp_block_nr = AF_PACKET_RX_BLOCK_NR;
245 rx_req->tp_frame_nr = AF_PACKET_RX_FRAME_NR;
246
Damjan Marion00a9dca2016-08-17 17:05:46 +0200247 vec_validate (tx_req, 0);
Damjan Marion83243a02016-02-29 13:09:30 +0100248 tx_req->tp_block_size = AF_PACKET_TX_BLOCK_SIZE;
249 tx_req->tp_frame_size = AF_PACKET_TX_FRAME_SIZE;
250 tx_req->tp_block_nr = AF_PACKET_TX_BLOCK_NR;
251 tx_req->tp_frame_nr = AF_PACKET_TX_FRAME_NR;
252
Mohsin Kazmia50a14c2018-04-25 15:58:05 +0200253 /*
254 * make sure host side of interface is 'UP' before binding AF_PACKET
255 * socket on it.
256 */
257 if ((fd2 = socket (AF_UNIX, SOCK_DGRAM, 0)) < 0)
Ray Kinsellac855b732017-04-21 12:24:43 +0100258 {
Mohsin Kazmiacba9f72018-05-17 15:42:27 +0200259 vlib_log_debug (apm->log_class, "Failed to create socket");
Mohsin Kazmia50a14c2018-04-25 15:58:05 +0200260 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
261 goto error;
262 }
263
264 clib_memcpy (ifr.ifr_name, (const char *) host_if_name,
265 vec_len (host_if_name));
266 if ((ret = ioctl (fd2, SIOCGIFINDEX, &ifr)) < 0)
267 {
Mohsin Kazmiacba9f72018-05-17 15:42:27 +0200268 vlib_log_debug (apm->log_class, "af_packet_create error: %d", ret);
Mohsin Kazmia50a14c2018-04-25 15:58:05 +0200269 close (fd2);
Ray Kinsellac855b732017-04-21 12:24:43 +0100270 return VNET_API_ERROR_INVALID_INTERFACE;
271 }
272
Mohsin Kazmia50a14c2018-04-25 15:58:05 +0200273 host_if_index = ifr.ifr_ifindex;
274 if ((ret = ioctl (fd2, SIOCGIFFLAGS, &ifr)) < 0)
275 {
Mohsin Kazmiacba9f72018-05-17 15:42:27 +0200276 vlib_log_warn (apm->log_class, "af_packet_create error: %d", ret);
Mohsin Kazmia50a14c2018-04-25 15:58:05 +0200277 goto error;
278 }
279
280 if (!(ifr.ifr_flags & IFF_UP))
281 {
282 ifr.ifr_flags |= IFF_UP;
283 if ((ret = ioctl (fd2, SIOCSIFFLAGS, &ifr)) < 0)
284 {
Mohsin Kazmiacba9f72018-05-17 15:42:27 +0200285 vlib_log_warn (apm->log_class, "af_packet_create error: %d", ret);
Mohsin Kazmia50a14c2018-04-25 15:58:05 +0200286 goto error;
287 }
288 }
289
290 if (fd2 > -1)
291 close (fd2);
292
Ray Kinsellac855b732017-04-21 12:24:43 +0100293 ret = create_packet_v2_sock (host_if_index, rx_req, tx_req, &fd, &ring);
Damjan Marion83243a02016-02-29 13:09:30 +0100294
295 if (ret != 0)
296 goto error;
297
Ray Kinsellac855b732017-04-21 12:24:43 +0100298 ret = is_bridge (host_if_name);
299
300 if (ret == 0) /* is a bridge, ignore state */
301 host_if_index = -1;
302
Damjan Marion83243a02016-02-29 13:09:30 +0100303 /* So far everything looks good, let's create interface */
Damjan Marion048ee2e2016-03-16 22:59:21 +0100304 pool_get (apm->interfaces, apif);
Damjan Marion83243a02016-02-29 13:09:30 +0100305 if_index = apif - apm->interfaces;
306
Ray Kinsellac855b732017-04-21 12:24:43 +0100307 apif->host_if_index = host_if_index;
Damjan Marion83243a02016-02-29 13:09:30 +0100308 apif->fd = fd;
309 apif->rx_ring = ring;
310 apif->tx_ring = ring + rx_req->tp_block_size * rx_req->tp_block_nr;
311 apif->rx_req = rx_req;
312 apif->tx_req = tx_req;
Ivan Kellybfe737a2016-10-07 18:02:43 +0200313 apif->host_if_name = host_if_name_dup;
Dave Barach13f3c452016-03-29 11:56:41 -0400314 apif->per_interface_next_index = ~0;
Peter Leidba76f22016-04-08 08:16:31 -0700315 apif->next_tx_frame = 0;
316 apif->next_rx_frame = 0;
Damjan Marion83243a02016-02-29 13:09:30 +0100317
Mohsin KAZMIcf751ec2017-01-18 11:59:45 +0100318 if (tm->n_vlib_mains > 1)
Damjan Marion1927da22017-03-27 17:08:20 +0200319 clib_spinlock_init (&apif->lockp);
Mohsin KAZMIcf751ec2017-01-18 11:59:45 +0100320
Damjan Marion83243a02016-02-29 13:09:30 +0100321 {
Damjan Marion56dd5432017-09-08 19:52:02 +0200322 clib_file_t template = { 0 };
Damjan Marion83243a02016-02-29 13:09:30 +0100323 template.read_function = af_packet_fd_read_ready;
324 template.file_descriptor = fd;
325 template.private_data = if_index;
326 template.flags = UNIX_FILE_EVENT_EDGE_TRIGGERED;
Damjan Marionceab7882018-01-19 20:56:12 +0100327 template.description = format (0, "%U", format_af_packet_device_name,
328 if_index);
Damjan Marion56dd5432017-09-08 19:52:02 +0200329 apif->clib_file_index = clib_file_add (&file_main, &template);
Damjan Marion83243a02016-02-29 13:09:30 +0100330 }
331
332 /*use configured or generate random MAC address */
333 if (hw_addr_set)
Damjan Marion00a9dca2016-08-17 17:05:46 +0200334 clib_memcpy (hw_addr, hw_addr_set, 6);
Damjan Marion83243a02016-02-29 13:09:30 +0100335 else
336 {
Damjan Marion00a9dca2016-08-17 17:05:46 +0200337 f64 now = vlib_time_now (vm);
Damjan Marion83243a02016-02-29 13:09:30 +0100338 u32 rnd;
339 rnd = (u32) (now * 1e6);
340 rnd = random_u32 (&rnd);
341
Damjan Marion00a9dca2016-08-17 17:05:46 +0200342 clib_memcpy (hw_addr + 2, &rnd, sizeof (rnd));
Damjan Marion83243a02016-02-29 13:09:30 +0100343 hw_addr[0] = 2;
344 hw_addr[1] = 0xfe;
345 }
346
Damjan Marion00a9dca2016-08-17 17:05:46 +0200347 error = ethernet_register_interface (vnm, af_packet_device_class.index,
348 if_index, hw_addr, &apif->hw_if_index,
349 af_packet_eth_flag_change);
Damjan Marion83243a02016-02-29 13:09:30 +0100350
351 if (error)
352 {
Damjan Marion00a9dca2016-08-17 17:05:46 +0200353 memset (apif, 0, sizeof (*apif));
354 pool_put (apm->interfaces, apif);
Mohsin Kazmiacba9f72018-05-17 15:42:27 +0200355 vlib_log_err (apm->log_class, "Unable to register interface: %U",
356 format_clib_error, error);
357 clib_error_free (error);
Damjan Marion83243a02016-02-29 13:09:30 +0100358 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
359 goto error;
360 }
361
362 sw = vnet_get_hw_sw_interface (vnm, apif->hw_if_index);
Damjan Marion44036902017-04-28 12:29:15 +0200363 hw = vnet_get_hw_interface (vnm, apif->hw_if_index);
Damjan Marion83243a02016-02-29 13:09:30 +0100364 apif->sw_if_index = sw->sw_if_index;
Damjan Marion44036902017-04-28 12:29:15 +0200365 vnet_hw_interface_set_input_node (vnm, apif->hw_if_index,
366 af_packet_input_node.index);
Damjan Marion83243a02016-02-29 13:09:30 +0100367
Damjan Marion44036902017-04-28 12:29:15 +0200368 vnet_hw_interface_assign_rx_thread (vnm, apif->hw_if_index, 0, /* queue */
369 ~0 /* any cpu */ );
370
371 hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_INT_MODE;
Damjan Marion83243a02016-02-29 13:09:30 +0100372 vnet_hw_interface_set_flags (vnm, apif->hw_if_index,
373 VNET_HW_INTERFACE_FLAG_LINK_UP);
374
Damjan Marion44036902017-04-28 12:29:15 +0200375 vnet_hw_interface_set_rx_mode (vnm, apif->hw_if_index, 0,
376 VNET_HW_INTERFACE_RX_MODE_INTERRUPT);
377
Ivan Kellybfe737a2016-10-07 18:02:43 +0200378 mhash_set_mem (&apm->if_index_by_host_if_name, host_if_name_dup, &if_index,
379 0);
Pierre Pfister78ea9c22016-05-23 12:51:54 +0100380 if (sw_if_index)
381 *sw_if_index = apif->sw_if_index;
Mohsin KAZMIcf751ec2017-01-18 11:59:45 +0100382
Damjan Marion83243a02016-02-29 13:09:30 +0100383 return 0;
384
385error:
Mohsin Kazmia50a14c2018-04-25 15:58:05 +0200386 if (fd2 > -1)
387 close (fd2);
Ivan Kellybfe737a2016-10-07 18:02:43 +0200388 vec_free (host_if_name_dup);
Damjan Marion00a9dca2016-08-17 17:05:46 +0200389 vec_free (rx_req);
390 vec_free (tx_req);
Damjan Marion83243a02016-02-29 13:09:30 +0100391 return ret;
392}
393
Peter Leidba76f22016-04-08 08:16:31 -0700394int
Damjan Marion00a9dca2016-08-17 17:05:46 +0200395af_packet_delete_if (vlib_main_t * vm, u8 * host_if_name)
Peter Leidba76f22016-04-08 08:16:31 -0700396{
Damjan Marion00a9dca2016-08-17 17:05:46 +0200397 vnet_main_t *vnm = vnet_get_main ();
Peter Leidba76f22016-04-08 08:16:31 -0700398 af_packet_main_t *apm = &af_packet_main;
399 af_packet_if_t *apif;
400 uword *p;
401 uword if_index;
402 u32 ring_sz;
403
Damjan Marion00a9dca2016-08-17 17:05:46 +0200404 p = mhash_get (&apm->if_index_by_host_if_name, host_if_name);
405 if (p == NULL)
406 {
Mohsin Kazmiacba9f72018-05-17 15:42:27 +0200407 vlib_log_warn (apm->log_class, "Host interface %s does not exist",
408 host_if_name);
Damjan Marion00a9dca2016-08-17 17:05:46 +0200409 return VNET_API_ERROR_SYSCALL_ERROR_1;
410 }
411 apif = pool_elt_at_index (apm->interfaces, p[0]);
Peter Leidba76f22016-04-08 08:16:31 -0700412 if_index = apif - apm->interfaces;
413
414 /* bring down the interface */
Damjan Marion00a9dca2016-08-17 17:05:46 +0200415 vnet_hw_interface_set_flags (vnm, apif->hw_if_index, 0);
Damjan Marion44036902017-04-28 12:29:15 +0200416 vnet_hw_interface_unassign_rx_thread (vnm, apif->hw_if_index, 0);
Peter Leidba76f22016-04-08 08:16:31 -0700417
418 /* clean up */
Damjan Marion56dd5432017-09-08 19:52:02 +0200419 if (apif->clib_file_index != ~0)
Damjan Marion00a9dca2016-08-17 17:05:46 +0200420 {
Damjan Marion56dd5432017-09-08 19:52:02 +0200421 clib_file_del (&file_main, file_main.file_pool + apif->clib_file_index);
422 apif->clib_file_index = ~0;
Damjan Marion00a9dca2016-08-17 17:05:46 +0200423 }
Eyal Barif298ecf2016-09-19 18:47:39 +0300424 else
425 close (apif->fd);
426
Peter Leidba76f22016-04-08 08:16:31 -0700427 ring_sz = apif->rx_req->tp_block_size * apif->rx_req->tp_block_nr +
Damjan Marion00a9dca2016-08-17 17:05:46 +0200428 apif->tx_req->tp_block_size * apif->tx_req->tp_block_nr;
429 if (munmap (apif->rx_ring, ring_sz))
Mohsin Kazmiacba9f72018-05-17 15:42:27 +0200430 vlib_log_warn (apm->log_class,
431 "Host interface %s could not free rx/tx ring",
432 host_if_name);
Peter Leidba76f22016-04-08 08:16:31 -0700433 apif->rx_ring = NULL;
434 apif->tx_ring = NULL;
Peter Leidba76f22016-04-08 08:16:31 -0700435 apif->fd = -1;
436
Damjan Marion00a9dca2016-08-17 17:05:46 +0200437 vec_free (apif->rx_req);
Peter Leidba76f22016-04-08 08:16:31 -0700438 apif->rx_req = NULL;
Damjan Marion00a9dca2016-08-17 17:05:46 +0200439 vec_free (apif->tx_req);
Peter Leidba76f22016-04-08 08:16:31 -0700440 apif->tx_req = NULL;
441
Damjan Marion00a9dca2016-08-17 17:05:46 +0200442 vec_free (apif->host_if_name);
Peter Leidba76f22016-04-08 08:16:31 -0700443 apif->host_if_name = NULL;
Ray Kinsellac855b732017-04-21 12:24:43 +0100444 apif->host_if_index = -1;
Peter Leidba76f22016-04-08 08:16:31 -0700445
Damjan Marion00a9dca2016-08-17 17:05:46 +0200446 mhash_unset (&apm->if_index_by_host_if_name, host_if_name, &if_index);
Peter Leidba76f22016-04-08 08:16:31 -0700447
Damjan Marion00a9dca2016-08-17 17:05:46 +0200448 ethernet_delete_interface (vnm, apif->hw_if_index);
Peter Leidba76f22016-04-08 08:16:31 -0700449
Damjan Marion00a9dca2016-08-17 17:05:46 +0200450 pool_put (apm->interfaces, apif);
Peter Leidba76f22016-04-08 08:16:31 -0700451
452 return 0;
453}
454
Jakub Grajciar92b02752017-10-20 13:37:28 +0200455int
456af_packet_set_l4_cksum_offload (vlib_main_t * vm, u32 sw_if_index, u8 set)
457{
458 vnet_main_t *vnm = vnet_get_main ();
459 vnet_hw_interface_t *hw;
460
461 hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
462
Jakub Grajciar64ae7782017-11-14 13:45:04 +0100463 if (hw->dev_class_index != af_packet_device_class.index)
464 return VNET_API_ERROR_INVALID_INTERFACE;
465
Jakub Grajciar92b02752017-10-20 13:37:28 +0200466 if (set)
467 hw->flags &= ~VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD;
468 else
469 hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD;
470
471 return 0;
472}
473
Damjan Marion83243a02016-02-29 13:09:30 +0100474static clib_error_t *
475af_packet_init (vlib_main_t * vm)
476{
Damjan Marion00a9dca2016-08-17 17:05:46 +0200477 af_packet_main_t *apm = &af_packet_main;
Damjan Marion553f6bd2016-09-07 11:54:22 +0200478 vlib_thread_main_t *tm = vlib_get_thread_main ();
Damjan Marion83243a02016-02-29 13:09:30 +0100479
480 memset (apm, 0, sizeof (af_packet_main_t));
481
482 mhash_init_vec_string (&apm->if_index_by_host_if_name, sizeof (uword));
483
Damjan Marion553f6bd2016-09-07 11:54:22 +0200484 vec_validate_aligned (apm->rx_buffers, tm->n_vlib_mains - 1,
485 CLIB_CACHE_LINE_BYTES);
486
Mohsin Kazmiacba9f72018-05-17 15:42:27 +0200487 apm->log_class = vlib_log_register_class ("af_packet", 0);
488 vlib_log_debug (apm->log_class, "initialized");
489
Damjan Marion83243a02016-02-29 13:09:30 +0100490 return 0;
491}
492
493VLIB_INIT_FUNCTION (af_packet_init);
Damjan Marion00a9dca2016-08-17 17:05:46 +0200494
495/*
496 * fd.io coding-style-patch-verification: ON
497 *
498 * Local Variables:
499 * eval: (c-set-style "gnu")
500 * End:
501 */