urtwn.4: Fix synopsis (usb4bsd -> usb).
[dragonfly.git] / tools / tools / netrate / pktgen / pktgen.c
CommitLineData
4fa8e46e 1/*
391741ec 2 * Copyright (c) 2012 The DragonFly Project. All rights reserved.
4fa8e46e
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3 *
4 * This code is derived from software contributed to The DragonFly Project
5 * by Sepherosa Ziehau <sepherosa@gmail.com>
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
db161a19 34 * $DragonFly: src/tools/tools/netrate/pktgen/pktgen.c,v 1.4 2008/04/02 14:18:55 sephe Exp $
4fa8e46e
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35 */
36
37#define _IP_VHL
38
39#include <sys/param.h>
40#include <sys/conf.h>
41#include <sys/device.h>
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42#include <sys/in_cksum.h>
43#include <sys/kernel.h>
44#include <sys/malloc.h>
45#include <sys/mbuf.h>
46#include <sys/proc.h>
9eaf083f 47#include <sys/priv.h>
391741ec 48#include <sys/queue.h>
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49#include <sys/socket.h>
50#include <sys/systm.h>
51#include <sys/serialize.h>
52
53#include <net/if.h>
54#include <net/if_dl.h>
55#include <net/if_var.h>
56#include <net/ifq_var.h>
57#include <net/ethernet.h>
391741ec 58#include <net/netmsg2.h>
5337421c 59#include <net/netisr2.h>
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60
61#include <netinet/in.h>
62#include <netinet/ip.h>
63#include <netinet/udp_var.h>
64
65#include "pktgen.h"
66
67#define CDEV_NAME "pktg"
4fa8e46e 68
391741ec
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69#define PKTGEN_BUFSZ 2048
70
390d8a05
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71#ifndef PKTGEN_DEVCNT
72#define PKTGEN_DEVCNT 4
73#endif
74
391741ec
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75struct pktgen;
76
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77struct netmsg_pktgen {
78 struct netmsg_base np_base;
79 struct pktgen *np_pktg;
80 struct ifaltq_subque *np_ifsq;
81};
82
391741ec
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83struct pktgen_buf {
84 struct netmsg_base pb_nmsg; /* MUST BE THE FIRST */
85 void *pb_buf;
86 volatile int pb_done;
4c9906cb 87 int pb_inuse;
391741ec 88 struct ifnet *pb_ifp;
2fb36fab 89 struct ifaltq_subque *pb_ifsq;
391741ec
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90 int pb_len;
91 int pb_cpuid;
92 struct pktgen *pb_pktg;
93 LIST_ENTRY(pktgen_buf) pb_link;
94};
95
1bbaa2ad
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96struct pktgen_pcpu {
97 struct callout pktg_stop;
98 LIST_HEAD(, pktgen_buf) pktg_buflist;
99};
100
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101struct pktgen {
102 uint32_t pktg_flags; /* PKTG_F_ */
103 int pktg_refcnt;
104
4fa8e46e 105 int pktg_duration;
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106
107 int pktg_datalen;
4fa8e46e 108 struct ifnet *pktg_ifp;
c95ebcd6 109
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110 int pktg_pktenq;
111
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112 struct sockaddr_in pktg_src;
113 int pktg_ndst;
114 struct sockaddr_in *pktg_dst;
4fa8e46e 115 uint8_t pktg_dst_lladdr[ETHER_ADDR_LEN];
391741ec 116
1bbaa2ad 117 struct pktgen_pcpu pktg_pcpu[MAXCPU];
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118};
119
120#define PKTG_F_CONFIG 0x1
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121#define PKTG_F_RUNNING 0x4
122
123static int pktgen_modevent(module_t, int, void *);
391741ec
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124
125static void pktgen_buf_free(void *);
126static void pktgen_buf_ref(void *);
127static void pktgen_buf_send(netmsg_t);
128
4fa8e46e 129static int pktgen_config(struct pktgen *,
391741ec 130 const struct pktgen_conf *);
b0cd2b4b 131static int pktgen_start(struct pktgen *, int);
391741ec 132static void pktgen_free(struct pktgen *);
c6830078 133static void pktgen_ref(struct pktgen *);
1bbaa2ad 134static void pktgen_pcpu_stop_cb(void *);
391741ec 135static void pktgen_mbuf(struct pktgen_buf *, struct mbuf *);
b0cd2b4b
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136static void pktgen_start_ifsq(struct pktgen *,
137 struct ifaltq_subque *);
138static void pktgen_start_ifsq_handler(netmsg_t);
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139
140static d_open_t pktgen_open;
141static d_close_t pktgen_close;
142static d_ioctl_t pktgen_ioctl;
143
144static struct dev_ops pktgen_ops = {
624409c2 145 { CDEV_NAME, 0, D_MPSAFE },
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146 .d_open = pktgen_open,
147 .d_close = pktgen_close,
148 .d_ioctl = pktgen_ioctl,
149};
150
4c9906cb 151static volatile int pktgen_refcnt;
e3d0d8d7 152static struct lwkt_token pktgen_tok = LWKT_TOKEN_INITIALIZER(pktgen_token);
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153
154MALLOC_DECLARE(M_PKTGEN);
155MALLOC_DEFINE(M_PKTGEN, CDEV_NAME, "Packet generator");
156
157DEV_MODULE(pktgen, pktgen_modevent, NULL);
158
159static int
160pktgen_modevent(module_t mod, int type, void *data)
161{
390d8a05 162 int error = 0, i;
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163
164 switch (type) {
165 case MOD_LOAD:
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166 for (i = 0; i < PKTGEN_DEVCNT; ++i) {
167 make_dev(&pktgen_ops, 0, UID_ROOT, GID_WHEEL, 0600,
168 CDEV_NAME"%d", i);
169 }
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170 break;
171
172 case MOD_UNLOAD:
173 if (pktgen_refcnt > 0)
174 return EBUSY;
4b3b3198 175 dev_ops_remove_all(&pktgen_ops);
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176 break;
177
178 default:
179 error = EOPNOTSUPP;
180 break;
181 }
182 return error;
183}
184
185static int
186pktgen_open(struct dev_open_args *ap)
187{
188 cdev_t dev = ap->a_head.a_dev;
189 struct pktgen *pktg;
1bbaa2ad 190 int error, i;
4fa8e46e 191
9eaf083f 192 error = priv_check_cred(ap->a_cred, PRIV_ROOT, 0);
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193 if (error)
194 return error;
195
e3d0d8d7 196 lwkt_gettoken(&pktgen_tok);
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197
198 if (dev->si_drv1 != NULL) {
e3d0d8d7 199 lwkt_reltoken(&pktgen_tok);
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200 return EBUSY;
201 }
202
203 pktg = kmalloc(sizeof(*pktg), M_PKTGEN, M_ZERO | M_WAITOK);
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204 for (i = 0; i < ncpus; ++i) {
205 struct pktgen_pcpu *p = &pktg->pktg_pcpu[i];
206
207 callout_init_mp(&p->pktg_stop);
208 LIST_INIT(&p->pktg_buflist);
209 }
4fa8e46e 210
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211 dev->si_drv1 = pktg;
212 pktg->pktg_refcnt = 1;
213
4c9906cb 214 atomic_add_int(&pktgen_refcnt, 1);
4fa8e46e 215
e3d0d8d7 216 lwkt_reltoken(&pktgen_tok);
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217 return 0;
218}
219
220static int
221pktgen_close(struct dev_close_args *ap)
222{
223 cdev_t dev = ap->a_head.a_dev;
224 struct pktgen *pktg = dev->si_drv1;
225
e3d0d8d7 226 lwkt_gettoken(&pktgen_tok);
4fa8e46e 227 dev->si_drv1 = NULL;
e3d0d8d7 228 lwkt_reltoken(&pktgen_tok);
391741ec 229
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230 pktgen_free(pktg);
231
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232 return 0;
233}
234
235static int
236pktgen_ioctl(struct dev_ioctl_args *ap __unused)
237{
238 cdev_t dev = ap->a_head.a_dev;
239 caddr_t data = ap->a_data;
240 struct pktgen *pktg = dev->si_drv1;
241 int error;
242
e3d0d8d7 243 lwkt_gettoken(&pktgen_tok);
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244
245 switch (ap->a_cmd) {
246 case PKTGENSTART:
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247 error = pktgen_start(pktg, 0);
248 break;
249
250 case PKTGENMQSTART:
251 error = pktgen_start(pktg, 1);
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252 break;
253
254 case PKTGENSCONF:
255 error = pktgen_config(pktg, (const struct pktgen_conf *)data);
256 break;
257
258 default:
259 error = EOPNOTSUPP;
260 break;
261 }
262
e3d0d8d7 263 lwkt_reltoken(&pktgen_tok);
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264 return error;
265}
266
267static int
268pktgen_config(struct pktgen *pktg, const struct pktgen_conf *conf)
269{
270 const struct sockaddr_in *sin;
391741ec 271 struct sockaddr_in *dst = NULL;
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272 const struct sockaddr *sa;
273 struct ifnet *ifp;
391741ec 274 size_t dst_size;
793f802f 275 int i, error, pktenq;
4fa8e46e 276
391741ec 277 if (pktg->pktg_flags & (PKTG_F_RUNNING | PKTG_F_CONFIG))
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278 return EBUSY;
279
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280 if (conf->pc_datalen <= 0 ||
281 conf->pc_datalen > ETHERMTU - sizeof(struct udpiphdr))
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282 return EINVAL;
283 if (conf->pc_duration <= 0)
284 return EINVAL;
285
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286 sin = &conf->pc_src;
287 if (sin->sin_family != AF_INET)
288 return EPROTONOSUPPORT;
289 if (sin->sin_port == 0)
290 return EINVAL;
291
391741ec 292 if (conf->pc_ndst <= 0)
4fa8e46e 293 return EINVAL;
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294 dst_size = conf->pc_ndst * sizeof(struct sockaddr_in);
295
296 dst = kmalloc(dst_size, M_PKTGEN, M_WAITOK | M_NULLOK);
297 if (dst == NULL)
298 return ENOMEM;
4fa8e46e 299
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300 error = copyin(conf->pc_dst, dst, dst_size);
301 if (error)
302 goto failed;
303
304 for (i = 0; i < conf->pc_ndst; ++i) {
305 sin = &dst[i];
306 if (sin->sin_family != AF_INET) {
307 error = EPROTONOSUPPORT;
308 goto failed;
309 }
310 if (sin->sin_port == 0) {
311 error = EINVAL;
312 goto failed;
313 }
314 }
315
316 ifp = ifunit(conf->pc_ifname);
317 if (ifp == NULL) {
318 error = ENXIO;
319 goto failed;
320 }
321
793f802f 322 pktenq = conf->pc_pktenq;
2fb36fab 323 if (pktenq < 0 || pktenq > ifp->if_snd.altq_maxlen) {
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324 error = ENOBUFS;
325 goto failed;
326 } else if (pktenq == 0) {
2fb36fab 327 pktenq = (ifp->if_snd.altq_maxlen * 3) / 4;
793f802f
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328 }
329
391741ec
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330 sa = &conf->pc_dst_lladdr;
331 if (sa->sa_family != AF_LINK) {
332 error = EPROTONOSUPPORT;
333 goto failed;
334 }
335 if (sa->sa_len != ETHER_ADDR_LEN) {
336 error = EPROTONOSUPPORT;
337 goto failed;
338 }
339 if (ETHER_IS_MULTICAST(sa->sa_data) ||
340 bcmp(sa->sa_data, ifp->if_broadcastaddr, ifp->if_addrlen) == 0) {
341 error = EADDRNOTAVAIL;
342 goto failed;
343 }
344
345 /*
346 * Accept the config
347 */
4fa8e46e 348 pktg->pktg_flags |= PKTG_F_CONFIG;
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349
350 pktg->pktg_duration = conf->pc_duration;
4fa8e46e 351 pktg->pktg_datalen = conf->pc_datalen;
793f802f 352 pktg->pktg_pktenq = pktenq;
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353 pktg->pktg_ifp = ifp;
354 pktg->pktg_src = conf->pc_src;
355 pktg->pktg_ndst = conf->pc_ndst;
356 KKASSERT(pktg->pktg_dst == NULL);
357 pktg->pktg_dst = dst;
4fa8e46e 358 bcopy(sa->sa_data, pktg->pktg_dst_lladdr, ETHER_ADDR_LEN);
c95ebcd6 359
4fa8e46e 360 return 0;
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361
362failed:
363 if (dst != NULL)
364 kfree(dst, M_PKTGEN);
365 return error;
4fa8e46e
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366}
367
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368static void
369pktgen_start_ifsq(struct pktgen *pktg, struct ifaltq_subque *ifsq)
370{
371 struct netmsg_pktgen *np;
372
373 np = kmalloc(sizeof(*np), M_LWKTMSG, M_WAITOK);
374 netmsg_init(&np->np_base, NULL, &netisr_afree_rport, 0,
375 pktgen_start_ifsq_handler);
376 np->np_pktg = pktg;
377 np->np_ifsq = ifsq;
378
ec7f7fc8 379 lwkt_sendmsg(netisr_cpuport(ifsq_get_cpuid(ifsq)), &np->np_base.lmsg);
b0cd2b4b
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380}
381
4fa8e46e 382static int
b0cd2b4b 383pktgen_start(struct pktgen *pktg, int mq)
4fa8e46e 384{
b0cd2b4b
SZ
385 struct ifaltq *ifq;
386
387 if ((pktg->pktg_flags & PKTG_F_CONFIG) == 0)
388 return EINVAL;
389 if (pktg->pktg_flags & PKTG_F_RUNNING)
390 return EBUSY;
391 pktg->pktg_flags |= PKTG_F_RUNNING;
392
393 ifq = &pktg->pktg_ifp->if_snd;
394 if (!mq) {
395 pktgen_ref(pktg);
396 pktgen_start_ifsq(pktg, ifq_get_subq_default(ifq));
397 } else {
398 int i;
399
400 for (i = 0; i < ifq->altq_subq_cnt; ++i)
401 pktgen_ref(pktg);
402 for (i = 0; i < ifq->altq_subq_cnt; ++i)
403 pktgen_start_ifsq(pktg, ifq_get_subq(ifq, i));
404 }
405 return 0;
406}
407
408static void
409pktgen_start_ifsq_handler(netmsg_t nmsg)
410{
411 struct netmsg_pktgen *np = (struct netmsg_pktgen *)nmsg;
412 struct pktgen *pktg = np->np_pktg;
413 struct ifaltq_subque *ifsq = np->np_ifsq;
414
391741ec
SZ
415 struct mbuf *m, *head = NULL, **next;
416 struct ifnet *ifp;
1bbaa2ad 417 struct pktgen_pcpu *p;
b0cd2b4b 418 int cpuid, i, alloc_cnt, keep_cnt;
391741ec
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419
420 u_short ulen, psum;
421 int len, ip_len;
422
b0cd2b4b
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423 /* Reply ASAP */
424 lwkt_replymsg(&np->np_base.lmsg, 0);
4fa8e46e 425
391741ec 426 ifp = pktg->pktg_ifp;
4fa8e46e 427
2fb36fab 428 cpuid = ifsq_get_cpuid(ifsq);
b0cd2b4b 429 KKASSERT(cpuid == mycpuid);
4fa8e46e 430
1bbaa2ad
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431 p = &pktg->pktg_pcpu[cpuid];
432
793f802f
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433 keep_cnt = pktg->pktg_pktenq;
434 alloc_cnt = keep_cnt * 2;
4fa8e46e 435
391741ec
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436 /*
437 * Prefault enough mbuf into mbuf objcache
438 */
439 next = &head;
440 for (i = 0; i < alloc_cnt; ++i) {
441 MGETHDR(m, MB_WAIT, MT_DATA);
442 *next = m;
443 next = &m->m_nextpkt;
444 }
4fa8e46e 445
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446 for (i = 0; i < alloc_cnt - keep_cnt; ++i) {
447 m = head;
448 head = m->m_nextpkt;
449 m->m_nextpkt = NULL;
450 m_freem(m);
451 }
452 KKASSERT(head != NULL);
4fa8e46e 453
391741ec
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454 /*
455 * Setup the packets' data
456 */
457 ip_len = pktg->pktg_datalen + sizeof(struct udpiphdr);
4fa8e46e
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458 len = ip_len + ETHER_HDR_LEN;
459
391741ec
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460 psum = htons((u_short)pktg->pktg_datalen + sizeof(struct udphdr) +
461 IPPROTO_UDP);
4fa8e46e
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462 ulen = htons(pktg->pktg_datalen + sizeof(struct udphdr));
463
391741ec
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464 m = head;
465 i = 0;
466 while (m != NULL) {
467 struct mbuf *nextm;
468 const struct sockaddr_in *dst;
469 struct pktgen_buf *pb;
470 struct ip *ip;
471 struct udpiphdr *ui;
472 struct ether_header *eh;
473
c6830078 474 pktgen_ref(pktg);
391741ec
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475
476 pb = kmalloc(sizeof(*pb), M_PKTGEN, M_WAITOK | M_ZERO);
477 pb->pb_ifp = ifp;
2fb36fab 478 pb->pb_ifsq = ifsq;
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479 pb->pb_inuse = 1;
480 pb->pb_buf = kmalloc(PKTGEN_BUFSZ, M_PKTGEN, M_WAITOK);
481 pb->pb_len = len;
482 pb->pb_cpuid = cpuid;
483 pb->pb_pktg = pktg;
484 netmsg_init(&pb->pb_nmsg, NULL, &netisr_adone_rport, 0,
485 pktgen_buf_send);
1bbaa2ad 486 LIST_INSERT_HEAD(&p->pktg_buflist, pb, pb_link);
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487
488 dst = &pktg->pktg_dst[i % pktg->pktg_ndst];
489 ++i;
490
491 m->m_ext.ext_arg = pb;
492 m->m_ext.ext_buf = pb->pb_buf;
493 m->m_ext.ext_free = pktgen_buf_free;
494 m->m_ext.ext_ref = pktgen_buf_ref;
495 m->m_ext.ext_size = PKTGEN_BUFSZ;
496
497 m->m_data = m->m_ext.ext_buf;
498 m->m_flags |= M_EXT;
4fa8e46e
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499 m->m_len = m->m_pkthdr.len = len;
500
391741ec
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501 m->m_data += ETHER_HDR_LEN;
502 m->m_len -= ETHER_HDR_LEN;
503 m->m_pkthdr.len -= ETHER_HDR_LEN;
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504
505 ui = mtod(m, struct udpiphdr *);
506 ui->ui_pr = IPPROTO_UDP;
391741ec
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507 ui->ui_src.s_addr = pktg->pktg_src.sin_addr.s_addr;
508 ui->ui_dst.s_addr = dst->sin_addr.s_addr;
509 ui->ui_sport = pktg->pktg_src.sin_port;
510 ui->ui_dport = dst->sin_port;
4fa8e46e 511 ui->ui_ulen = ulen;
391741ec
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512 ui->ui_sum = in_pseudo(ui->ui_src.s_addr, ui->ui_dst.s_addr,
513 psum);
64c94a5f 514 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
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515
516 ip = (struct ip *)ui;
517 ip->ip_len = ip_len;
518 ip->ip_ttl = 64; /* XXX */
519 ip->ip_tos = 0; /* XXX */
520 ip->ip_vhl = IP_VHL_BORING;
521 ip->ip_off = 0;
2640b9e5 522 ip->ip_sum = 0;
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523 ip->ip_id = ip_newid();
524
391741ec 525 in_delayed_cksum(m);
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526
527 ip->ip_len = htons(ip->ip_len);
391741ec
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528 ip->ip_sum = in_cksum_hdr(ip);
529
530 m->m_data -= ETHER_HDR_LEN;
531 m->m_len += ETHER_HDR_LEN;
532 m->m_pkthdr.len += ETHER_HDR_LEN;
c95ebcd6 533
c95ebcd6
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534 eh = mtod(m, struct ether_header *);
535 bcopy(pktg->pktg_dst_lladdr, eh->ether_dhost, ETHER_ADDR_LEN);
536 bcopy(IF_LLADDR(ifp), eh->ether_shost, ETHER_ADDR_LEN);
537 eh->ether_type = htons(ETHERTYPE_IP);
538
391741ec
SZ
539 nextm = m->m_nextpkt;
540 m->m_nextpkt = NULL;
c95ebcd6 541
391741ec 542 ifq_dispatch(ifp, m, NULL);
c95ebcd6 543
391741ec
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544 m = nextm;
545 }
c95ebcd6 546
1bbaa2ad
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547 callout_reset(&p->pktg_stop, pktg->pktg_duration * hz,
548 pktgen_pcpu_stop_cb, p);
c95ebcd6 549
b0cd2b4b 550 pktgen_free(pktg);
391741ec 551}
c95ebcd6 552
391741ec
SZ
553static void
554pktgen_mbuf(struct pktgen_buf *pb, struct mbuf *m)
555{
556 m->m_ext.ext_arg = pb;
557 m->m_ext.ext_buf = pb->pb_buf;
558 m->m_ext.ext_free = pktgen_buf_free;
559 m->m_ext.ext_ref = pktgen_buf_ref;
560 m->m_ext.ext_size = PKTGEN_BUFSZ;
561
562 m->m_data = m->m_ext.ext_buf;
563 m->m_flags |= M_EXT;
564 m->m_len = m->m_pkthdr.len = pb->pb_len;
565}
c95ebcd6 566
391741ec
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567static void
568pktgen_buf_send(netmsg_t msg)
569{
570 struct pktgen_buf *pb = (struct pktgen_buf *)msg;
571 struct mbuf *m;
c95ebcd6 572
ec7f7fc8 573 KKASSERT(&curthread->td_msgport == netisr_cpuport(pb->pb_cpuid));
c95ebcd6 574
391741ec
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575 crit_enter();
576 lwkt_replymsg(&pb->pb_nmsg.lmsg, 0);
577 crit_exit();
c95ebcd6 578
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579 MGETHDR(m, MB_WAIT, MT_DATA);
580 pktgen_mbuf(pb, m);
581 ifq_dispatch(pb->pb_ifp, m, NULL);
582}
c95ebcd6 583
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584static void
585pktgen_buf_free(void *arg)
586{
587 struct pktgen_buf *pb = arg;
588 struct mbuf *m;
c95ebcd6 589
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590 KKASSERT(pb->pb_inuse > 0);
591 if (pb->pb_done) {
592 if (atomic_fetchadd_int(&pb->pb_inuse, -1) == 1) {
593 struct pktgen *pktg;
c95ebcd6 594
391741ec 595 pktg = pb->pb_pktg;
4c9906cb 596 crit_enter();
391741ec 597 LIST_REMOVE(pb, pb_link);
4c9906cb 598 crit_exit();
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SZ
599 kfree(pb->pb_buf, M_PKTGEN);
600 kfree(pb, M_PKTGEN);
4fa8e46e 601
391741ec 602 pktgen_free(pktg);
4fa8e46e 603 }
391741ec 604 return;
4fa8e46e 605 }
db161a19 606
ec7f7fc8 607 if (&curthread->td_msgport != netisr_cpuport(pb->pb_cpuid)) {
391741ec
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608 KKASSERT(pb->pb_cpuid == mycpuid);
609 crit_enter();
610 KKASSERT(pb->pb_nmsg.lmsg.ms_flags & MSGF_DONE);
ec7f7fc8 611 lwkt_sendmsg(netisr_cpuport(pb->pb_cpuid), &pb->pb_nmsg.lmsg);
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612 crit_exit();
613 return;
614 }
615
616 MGETHDR(m, MB_WAIT, MT_DATA);
617 pktgen_mbuf(pb, m);
2fb36fab 618 ifsq_enqueue(pb->pb_ifsq, m, NULL);
db161a19
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619}
620
621static void
391741ec 622pktgen_buf_ref(void *arg)
db161a19 623{
391741ec 624 struct pktgen_buf *pb = arg;
db161a19 625
391741ec 626 panic("%s should never be called\n", __func__);
4fa8e46e 627
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628 KKASSERT(pb->pb_inuse > 0);
629 atomic_add_int(&pb->pb_inuse, 1);
630}
4fa8e46e 631
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632static void
633pktgen_free(struct pktgen *pktg)
634{
4fa8e46e 635 KKASSERT(pktg->pktg_refcnt > 0);
4c9906cb 636 if (atomic_fetchadd_int(&pktg->pktg_refcnt, -1) == 1) {
1bbaa2ad
SZ
637 int i;
638
391741ec
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639 if (pktg->pktg_dst != NULL)
640 kfree(pktg->pktg_dst, M_PKTGEN);
1bbaa2ad
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641
642 for (i = 0; i < ncpus; ++i)
643 KKASSERT(LIST_EMPTY(&pktg->pktg_pcpu[i].pktg_buflist));
391741ec
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644 kfree(pktg, M_PKTGEN);
645 }
4fa8e46e
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646
647 KKASSERT(pktgen_refcnt > 0);
4c9906cb 648 atomic_subtract_int(&pktgen_refcnt, 1);
391741ec
SZ
649}
650
651static void
1bbaa2ad 652pktgen_pcpu_stop_cb(void *arg)
391741ec 653{
1bbaa2ad 654 struct pktgen_pcpu *p = arg;
391741ec 655 struct pktgen_buf *pb;
4fa8e46e 656
4c9906cb 657 crit_enter();
1bbaa2ad 658 LIST_FOREACH(pb, &p->pktg_buflist, pb_link)
391741ec 659 pb->pb_done = 1;
4c9906cb 660 crit_exit();
4fa8e46e 661}
c6830078
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662
663static void
664pktgen_ref(struct pktgen *pktg)
665{
666 atomic_add_int(&pktg->pktg_refcnt, 1);
667 atomic_add_int(&pktgen_refcnt, 1);
668}