1/*-
2 * Copyright (c) 2004
3 * Bosko Milekic <bmilekic@FreeBSD.org>.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice unmodified, this list of conditions and the following
11 * disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the author nor the names of contributors may be
16 * used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
| 1/*-
2 * Copyright (c) 2004
3 * Bosko Milekic <bmilekic@FreeBSD.org>.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice unmodified, this list of conditions and the following
11 * disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the author nor the names of contributors may be
16 * used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
|
33__FBSDID("$FreeBSD: head/sys/kern/kern_mbuf.c 129906 2004-05-31 21:46:06Z bmilekic $");
| 33__FBSDID("$FreeBSD: head/sys/kern/kern_mbuf.c 129947 2004-06-01 16:17:10Z bmilekic $");
|
34
35#include "opt_mac.h"
36#include "opt_param.h"
37
38#include <sys/param.h>
39#include <sys/mac.h>
40#include <sys/malloc.h>
41#include <sys/systm.h>
42#include <sys/mbuf.h>
43#include <sys/domain.h>
44#include <sys/eventhandler.h>
45#include <sys/kernel.h>
46#include <sys/protosw.h>
47#include <sys/smp.h>
48#include <sys/sysctl.h>
49
50#include <vm/vm.h>
51#include <vm/vm_page.h>
52#include <vm/uma.h>
53
54/*
55 * In FreeBSD, Mbufs and Mbuf Clusters are allocated from UMA
56 * Zones.
57 *
58 * Mbuf Clusters (2K, contiguous) are allocated from the Cluster
59 * Zone. The Zone can be capped at kern.ipc.nmbclusters, if the
60 * administrator so desires.
61 *
62 * Mbufs are allocated from a UMA Master Zone called the Mbuf
63 * Zone.
64 *
65 * Additionally, FreeBSD provides a Packet Zone, which it
66 * configures as a Secondary Zone to the Mbuf Master Zone,
67 * thus sharing backend Slab kegs with the Mbuf Master Zone.
68 *
69 * Thus common-case allocations and locking are simplified:
70 *
71 * m_clget() m_getcl()
72 * | |
73 * | .------------>[(Packet Cache)] m_get(), m_gethdr()
74 * | | [ Packet ] |
75 * [(Cluster Cache)] [ Secondary ] [ (Mbuf Cache) ]
76 * [ Cluster Zone ] [ Zone ] [ Mbuf Master Zone ]
77 * | \________ |
78 * [ Cluster Keg ] \ /
79 * | [ Mbuf Keg ]
80 * [ Cluster Slabs ] |
81 * | [ Mbuf Slabs ]
82 * \____________(VM)_________________/
83 */
84
85int nmbclusters;
86struct mbstat mbstat;
87
88static void
89tunable_mbinit(void *dummy)
90{
91
92 /* This has to be done before VM init. */
93 nmbclusters = 1024 + maxusers * 64;
94 TUNABLE_INT_FETCH("kern.ipc.nmbclusters", &nmbclusters);
95}
96SYSINIT(tunable_mbinit, SI_SUB_TUNABLES, SI_ORDER_ANY, tunable_mbinit, NULL);
97
98SYSCTL_DECL(_kern_ipc);
99SYSCTL_INT(_kern_ipc, OID_AUTO, nmbclusters, CTLFLAG_RW, &nmbclusters, 0,
100 "Maximum number of mbuf clusters allowed");
101SYSCTL_STRUCT(_kern_ipc, OID_AUTO, mbstat, CTLFLAG_RD, &mbstat, mbstat,
102 "Mbuf general information and statistics");
103
104/*
105 * Zones from which we allocate.
106 */
107uma_zone_t zone_mbuf;
108uma_zone_t zone_clust;
109uma_zone_t zone_pack;
110
111/*
112 * Local prototypes.
113 */
114static void mb_ctor_mbuf(void *, int, void *);
115static void mb_ctor_clust(void *, int, void *);
116static void mb_ctor_pack(void *, int, void *);
117static void mb_dtor_mbuf(void *, int, void *);
118static void mb_dtor_clust(void *, int, void *); /* XXX */
119static void mb_dtor_pack(void *, int, void *); /* XXX */
120static void mb_init_pack(void *, int);
121static void mb_fini_pack(void *, int);
122
123static void mb_reclaim(void *);
124static void mbuf_init(void *);
125
126/*
127 * Initialize FreeBSD Network buffer allocation.
128 */
129SYSINIT(mbuf, SI_SUB_MBUF, SI_ORDER_FIRST, mbuf_init, NULL)
130static void
131mbuf_init(void *dummy)
132{
133
134 /*
135 * Configure UMA zones for Mbufs, Clusters, and Packets.
136 */
137 zone_mbuf = uma_zcreate("Mbuf", MSIZE, mb_ctor_mbuf, mb_dtor_mbuf,
138 NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_MAXBUCKET);
139 zone_clust = uma_zcreate("MbufClust", MCLBYTES, mb_ctor_clust,
140 mb_dtor_clust, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_REFCNT);
141 if (nmbclusters > 0)
142 uma_zone_set_max(zone_clust, nmbclusters);
143 zone_pack = uma_zsecond_create("Packet", mb_ctor_pack, mb_dtor_pack,
144 mb_init_pack, mb_fini_pack, zone_mbuf);
145
146 /* uma_prealloc() goes here */
147
148 /*
149 * Hook event handler for low-memory situation, used to
150 * drain protocols and push data back to the caches (UMA
151 * later pushes it back to VM).
152 */
153 EVENTHANDLER_REGISTER(vm_lowmem, mb_reclaim, NULL,
154 EVENTHANDLER_PRI_FIRST);
155
156 /*
157 * [Re]set counters and local statistics knobs.
158 * XXX Some of these should go and be replaced, but UMA stat
159 * gathering needs to be revised.
160 */
161 mbstat.m_mbufs = 0;
162 mbstat.m_mclusts = 0;
163 mbstat.m_drain = 0;
164 mbstat.m_msize = MSIZE;
165 mbstat.m_mclbytes = MCLBYTES;
166 mbstat.m_minclsize = MINCLSIZE;
167 mbstat.m_mlen = MLEN;
168 mbstat.m_mhlen = MHLEN;
169 mbstat.m_numtypes = MT_NTYPES;
170
171 mbstat.m_mcfail = mbstat.m_mpfail = 0;
172 mbstat.sf_iocnt = 0;
173 mbstat.sf_allocwait = mbstat.sf_allocfail = 0;
174}
175
176/*
177 * Constructor for Mbuf master zone.
178 *
179 * The 'arg' pointer points to a mb_args structure which
180 * contains call-specific information required to support the
181 * mbuf allocation API.
182 */
183static void
184mb_ctor_mbuf(void *mem, int size, void *arg)
185{
186 struct mbuf *m;
187 struct mb_args *args;
188 int flags;
189 int how;
190 short type;
191
192 m = (struct mbuf *)mem;
193 args = (struct mb_args *)arg;
194 flags = args->flags;
195 how = args->how;
196 type = args->type;
197
198 m->m_type = type;
199 m->m_next = NULL;
200 m->m_nextpkt = NULL;
| 34
35#include "opt_mac.h"
36#include "opt_param.h"
37
38#include <sys/param.h>
39#include <sys/mac.h>
40#include <sys/malloc.h>
41#include <sys/systm.h>
42#include <sys/mbuf.h>
43#include <sys/domain.h>
44#include <sys/eventhandler.h>
45#include <sys/kernel.h>
46#include <sys/protosw.h>
47#include <sys/smp.h>
48#include <sys/sysctl.h>
49
50#include <vm/vm.h>
51#include <vm/vm_page.h>
52#include <vm/uma.h>
53
54/*
55 * In FreeBSD, Mbufs and Mbuf Clusters are allocated from UMA
56 * Zones.
57 *
58 * Mbuf Clusters (2K, contiguous) are allocated from the Cluster
59 * Zone. The Zone can be capped at kern.ipc.nmbclusters, if the
60 * administrator so desires.
61 *
62 * Mbufs are allocated from a UMA Master Zone called the Mbuf
63 * Zone.
64 *
65 * Additionally, FreeBSD provides a Packet Zone, which it
66 * configures as a Secondary Zone to the Mbuf Master Zone,
67 * thus sharing backend Slab kegs with the Mbuf Master Zone.
68 *
69 * Thus common-case allocations and locking are simplified:
70 *
71 * m_clget() m_getcl()
72 * | |
73 * | .------------>[(Packet Cache)] m_get(), m_gethdr()
74 * | | [ Packet ] |
75 * [(Cluster Cache)] [ Secondary ] [ (Mbuf Cache) ]
76 * [ Cluster Zone ] [ Zone ] [ Mbuf Master Zone ]
77 * | \________ |
78 * [ Cluster Keg ] \ /
79 * | [ Mbuf Keg ]
80 * [ Cluster Slabs ] |
81 * | [ Mbuf Slabs ]
82 * \____________(VM)_________________/
83 */
84
85int nmbclusters;
86struct mbstat mbstat;
87
88static void
89tunable_mbinit(void *dummy)
90{
91
92 /* This has to be done before VM init. */
93 nmbclusters = 1024 + maxusers * 64;
94 TUNABLE_INT_FETCH("kern.ipc.nmbclusters", &nmbclusters);
95}
96SYSINIT(tunable_mbinit, SI_SUB_TUNABLES, SI_ORDER_ANY, tunable_mbinit, NULL);
97
98SYSCTL_DECL(_kern_ipc);
99SYSCTL_INT(_kern_ipc, OID_AUTO, nmbclusters, CTLFLAG_RW, &nmbclusters, 0,
100 "Maximum number of mbuf clusters allowed");
101SYSCTL_STRUCT(_kern_ipc, OID_AUTO, mbstat, CTLFLAG_RD, &mbstat, mbstat,
102 "Mbuf general information and statistics");
103
104/*
105 * Zones from which we allocate.
106 */
107uma_zone_t zone_mbuf;
108uma_zone_t zone_clust;
109uma_zone_t zone_pack;
110
111/*
112 * Local prototypes.
113 */
114static void mb_ctor_mbuf(void *, int, void *);
115static void mb_ctor_clust(void *, int, void *);
116static void mb_ctor_pack(void *, int, void *);
117static void mb_dtor_mbuf(void *, int, void *);
118static void mb_dtor_clust(void *, int, void *); /* XXX */
119static void mb_dtor_pack(void *, int, void *); /* XXX */
120static void mb_init_pack(void *, int);
121static void mb_fini_pack(void *, int);
122
123static void mb_reclaim(void *);
124static void mbuf_init(void *);
125
126/*
127 * Initialize FreeBSD Network buffer allocation.
128 */
129SYSINIT(mbuf, SI_SUB_MBUF, SI_ORDER_FIRST, mbuf_init, NULL)
130static void
131mbuf_init(void *dummy)
132{
133
134 /*
135 * Configure UMA zones for Mbufs, Clusters, and Packets.
136 */
137 zone_mbuf = uma_zcreate("Mbuf", MSIZE, mb_ctor_mbuf, mb_dtor_mbuf,
138 NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_MAXBUCKET);
139 zone_clust = uma_zcreate("MbufClust", MCLBYTES, mb_ctor_clust,
140 mb_dtor_clust, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_REFCNT);
141 if (nmbclusters > 0)
142 uma_zone_set_max(zone_clust, nmbclusters);
143 zone_pack = uma_zsecond_create("Packet", mb_ctor_pack, mb_dtor_pack,
144 mb_init_pack, mb_fini_pack, zone_mbuf);
145
146 /* uma_prealloc() goes here */
147
148 /*
149 * Hook event handler for low-memory situation, used to
150 * drain protocols and push data back to the caches (UMA
151 * later pushes it back to VM).
152 */
153 EVENTHANDLER_REGISTER(vm_lowmem, mb_reclaim, NULL,
154 EVENTHANDLER_PRI_FIRST);
155
156 /*
157 * [Re]set counters and local statistics knobs.
158 * XXX Some of these should go and be replaced, but UMA stat
159 * gathering needs to be revised.
160 */
161 mbstat.m_mbufs = 0;
162 mbstat.m_mclusts = 0;
163 mbstat.m_drain = 0;
164 mbstat.m_msize = MSIZE;
165 mbstat.m_mclbytes = MCLBYTES;
166 mbstat.m_minclsize = MINCLSIZE;
167 mbstat.m_mlen = MLEN;
168 mbstat.m_mhlen = MHLEN;
169 mbstat.m_numtypes = MT_NTYPES;
170
171 mbstat.m_mcfail = mbstat.m_mpfail = 0;
172 mbstat.sf_iocnt = 0;
173 mbstat.sf_allocwait = mbstat.sf_allocfail = 0;
174}
175
176/*
177 * Constructor for Mbuf master zone.
178 *
179 * The 'arg' pointer points to a mb_args structure which
180 * contains call-specific information required to support the
181 * mbuf allocation API.
182 */
183static void
184mb_ctor_mbuf(void *mem, int size, void *arg)
185{
186 struct mbuf *m;
187 struct mb_args *args;
188 int flags;
189 int how;
190 short type;
191
192 m = (struct mbuf *)mem;
193 args = (struct mb_args *)arg;
194 flags = args->flags;
195 how = args->how;
196 type = args->type;
197
198 m->m_type = type;
199 m->m_next = NULL;
200 m->m_nextpkt = NULL;
|
| 201 m->m_flags = flags;
|
201 if (flags & M_PKTHDR) {
202 m->m_data = m->m_pktdat;
| 202 if (flags & M_PKTHDR) {
203 m->m_data = m->m_pktdat;
|
203 m->m_flags = M_PKTHDR;
| |
204 m->m_pkthdr.rcvif = NULL;
205 m->m_pkthdr.csum_flags = 0;
206 SLIST_INIT(&m->m_pkthdr.tags);
207#ifdef MAC
208 /* If the label init fails, fail the alloc */
209 if (mac_init_mbuf(m, how) != 0) {
210 m_free(m);
211/* XXX*/ panic("mb_ctor_mbuf(): can't deal with failure!");
212/* return 0; */
213 }
214#endif
| 204 m->m_pkthdr.rcvif = NULL;
205 m->m_pkthdr.csum_flags = 0;
206 SLIST_INIT(&m->m_pkthdr.tags);
207#ifdef MAC
208 /* If the label init fails, fail the alloc */
209 if (mac_init_mbuf(m, how) != 0) {
210 m_free(m);
211/* XXX*/ panic("mb_ctor_mbuf(): can't deal with failure!");
212/* return 0; */
213 }
214#endif
|
215 } else {
| 215 } else
|
216 m->m_data = m->m_dat;
| 216 m->m_data = m->m_dat;
|
217 m->m_flags = 0;
218 }
| |
219 mbstat.m_mbufs += 1; /* XXX */
220/* return 1;
221*/
222}
223
224/*
225 * The Mbuf master zone and Packet secondary zone destructor.
226 */
227static void
228mb_dtor_mbuf(void *mem, int size, void *arg)
229{
230 struct mbuf *m;
231
232 m = (struct mbuf *)mem;
233 if ((m->m_flags & M_PKTHDR) != 0)
234 m_tag_delete_chain(m, NULL);
235 mbstat.m_mbufs -= 1; /* XXX */
236}
237
238/* XXX Only because of stats */
239static void
240mb_dtor_pack(void *mem, int size, void *arg)
241{
242 struct mbuf *m;
243
244 m = (struct mbuf *)mem;
245 if ((m->m_flags & M_PKTHDR) != 0)
246 m_tag_delete_chain(m, NULL);
247 mbstat.m_mbufs -= 1; /* XXX */
248 mbstat.m_mclusts -= 1; /* XXX */
249}
250
251/*
252 * The Cluster zone constructor.
253 *
254 * Here the 'arg' pointer points to the Mbuf which we
255 * are configuring cluster storage for.
256 */
257static void
258mb_ctor_clust(void *mem, int size, void *arg)
259{
260 struct mbuf *m;
261
262 m = (struct mbuf *)arg;
263 m->m_ext.ext_buf = (caddr_t)mem;
264 m->m_data = m->m_ext.ext_buf;
265 m->m_flags |= M_EXT;
266 m->m_ext.ext_free = NULL;
267 m->m_ext.ext_args = NULL;
268 m->m_ext.ext_size = MCLBYTES;
269 m->m_ext.ext_type = EXT_CLUSTER;
270 m->m_ext.ref_cnt = (u_int *)uma_find_refcnt(zone_clust,
271 m->m_ext.ext_buf);
272 *(m->m_ext.ref_cnt) = 1;
273 mbstat.m_mclusts += 1; /* XXX */
274/* return 1;
275*/
276}
277
278/* XXX */
279static void
280mb_dtor_clust(void *mem, int size, void *arg)
281{
282 mbstat.m_mclusts -= 1; /* XXX */
283}
284
285/*
286 * The Packet secondary zone's init routine, executed on the
287 * object's transition from keg slab to zone cache.
288 */
289static void
290mb_init_pack(void *mem, int size)
291{
292 struct mbuf *m;
293
294 m = (struct mbuf *)mem;
295 m->m_ext.ext_buf = NULL;
296 uma_zalloc_arg(zone_clust, m, M_NOWAIT);
297 if (m->m_ext.ext_buf == NULL) /* XXX */
298 panic("mb_init_pack(): Can't deal with failure yet.");
299 mbstat.m_mclusts -= 1; /* XXX */
300}
301
302/*
303 * The Packet secondary zone's fini routine, executed on the
304 * object's transition from zone cache to keg slab.
305 */
306static void
307mb_fini_pack(void *mem, int size)
308{
309 struct mbuf *m;
310
311 m = (struct mbuf *)mem;
312 uma_zfree_arg(zone_clust, m->m_ext.ext_buf, NULL);
313 m->m_ext.ext_buf = NULL;
314 mbstat.m_mclusts += 1; /* XXX */
315}
316
317/*
318 * The "packet" keg constructor.
319 */
320static void
321mb_ctor_pack(void *mem, int size, void *arg)
322{
323 struct mbuf *m;
324 struct mb_args *args;
325 int flags, how;
326 short type;
327
328 m = (struct mbuf *)mem;
329 args = (struct mb_args *)arg;
330 flags = args->flags;
331 type = args->type;
332 how = args->how;
333
334 m->m_type = type;
335 m->m_next = NULL;
| 217 mbstat.m_mbufs += 1; /* XXX */
218/* return 1;
219*/
220}
221
222/*
223 * The Mbuf master zone and Packet secondary zone destructor.
224 */
225static void
226mb_dtor_mbuf(void *mem, int size, void *arg)
227{
228 struct mbuf *m;
229
230 m = (struct mbuf *)mem;
231 if ((m->m_flags & M_PKTHDR) != 0)
232 m_tag_delete_chain(m, NULL);
233 mbstat.m_mbufs -= 1; /* XXX */
234}
235
236/* XXX Only because of stats */
237static void
238mb_dtor_pack(void *mem, int size, void *arg)
239{
240 struct mbuf *m;
241
242 m = (struct mbuf *)mem;
243 if ((m->m_flags & M_PKTHDR) != 0)
244 m_tag_delete_chain(m, NULL);
245 mbstat.m_mbufs -= 1; /* XXX */
246 mbstat.m_mclusts -= 1; /* XXX */
247}
248
249/*
250 * The Cluster zone constructor.
251 *
252 * Here the 'arg' pointer points to the Mbuf which we
253 * are configuring cluster storage for.
254 */
255static void
256mb_ctor_clust(void *mem, int size, void *arg)
257{
258 struct mbuf *m;
259
260 m = (struct mbuf *)arg;
261 m->m_ext.ext_buf = (caddr_t)mem;
262 m->m_data = m->m_ext.ext_buf;
263 m->m_flags |= M_EXT;
264 m->m_ext.ext_free = NULL;
265 m->m_ext.ext_args = NULL;
266 m->m_ext.ext_size = MCLBYTES;
267 m->m_ext.ext_type = EXT_CLUSTER;
268 m->m_ext.ref_cnt = (u_int *)uma_find_refcnt(zone_clust,
269 m->m_ext.ext_buf);
270 *(m->m_ext.ref_cnt) = 1;
271 mbstat.m_mclusts += 1; /* XXX */
272/* return 1;
273*/
274}
275
276/* XXX */
277static void
278mb_dtor_clust(void *mem, int size, void *arg)
279{
280 mbstat.m_mclusts -= 1; /* XXX */
281}
282
283/*
284 * The Packet secondary zone's init routine, executed on the
285 * object's transition from keg slab to zone cache.
286 */
287static void
288mb_init_pack(void *mem, int size)
289{
290 struct mbuf *m;
291
292 m = (struct mbuf *)mem;
293 m->m_ext.ext_buf = NULL;
294 uma_zalloc_arg(zone_clust, m, M_NOWAIT);
295 if (m->m_ext.ext_buf == NULL) /* XXX */
296 panic("mb_init_pack(): Can't deal with failure yet.");
297 mbstat.m_mclusts -= 1; /* XXX */
298}
299
300/*
301 * The Packet secondary zone's fini routine, executed on the
302 * object's transition from zone cache to keg slab.
303 */
304static void
305mb_fini_pack(void *mem, int size)
306{
307 struct mbuf *m;
308
309 m = (struct mbuf *)mem;
310 uma_zfree_arg(zone_clust, m->m_ext.ext_buf, NULL);
311 m->m_ext.ext_buf = NULL;
312 mbstat.m_mclusts += 1; /* XXX */
313}
314
315/*
316 * The "packet" keg constructor.
317 */
318static void
319mb_ctor_pack(void *mem, int size, void *arg)
320{
321 struct mbuf *m;
322 struct mb_args *args;
323 int flags, how;
324 short type;
325
326 m = (struct mbuf *)mem;
327 args = (struct mb_args *)arg;
328 flags = args->flags;
329 type = args->type;
330 how = args->how;
331
332 m->m_type = type;
333 m->m_next = NULL;
|
| 334 m->m_nextpkt = NULL;
|
336 m->m_data = m->m_ext.ext_buf;
337 m->m_flags = flags|M_EXT;
338 m->m_ext.ext_free = NULL;
339 m->m_ext.ext_args = NULL;
340 m->m_ext.ext_size = MCLBYTES;
341 m->m_ext.ext_type = EXT_PACKET;
342 *(m->m_ext.ref_cnt) = 1;
343
344 if (flags & M_PKTHDR) {
| 335 m->m_data = m->m_ext.ext_buf;
336 m->m_flags = flags|M_EXT;
337 m->m_ext.ext_free = NULL;
338 m->m_ext.ext_args = NULL;
339 m->m_ext.ext_size = MCLBYTES;
340 m->m_ext.ext_type = EXT_PACKET;
341 *(m->m_ext.ref_cnt) = 1;
342
343 if (flags & M_PKTHDR) {
|
345 m->m_nextpkt = NULL;
| |
346 m->m_pkthdr.rcvif = NULL;
347 m->m_pkthdr.csum_flags = 0;
348 SLIST_INIT(&m->m_pkthdr.tags);
349#ifdef MAC
350 /* If the label init fails, fail the alloc */
351 if (mac_init_mbuf(m, how) != 0) {
352 m_free(m);
353/* XXX*/ panic("mb_ctor_pack(): can't deal with failure!");
354/* return 0; */
355 }
356#endif
357 }
358 mbstat.m_mbufs += 1; /* XXX */
359 mbstat.m_mclusts += 1; /* XXX */
360/* return 1;
361*/
362}
363
364/*
365 * This is the protocol drain routine.
366 *
367 * No locks should be held when this is called. The drain routines have to
368 * presently acquire some locks which raises the possibility of lock order
369 * reversal.
370 */
371static void
372mb_reclaim(void *junk)
373{
374 struct domain *dp;
375 struct protosw *pr;
376
377 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK | WARN_PANIC, NULL,
378 "mb_reclaim()");
379
380 mbstat.m_drain++;
381 for (dp = domains; dp != NULL; dp = dp->dom_next)
382 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
383 if (pr->pr_drain != NULL)
384 (*pr->pr_drain)();
385}
| 344 m->m_pkthdr.rcvif = NULL;
345 m->m_pkthdr.csum_flags = 0;
346 SLIST_INIT(&m->m_pkthdr.tags);
347#ifdef MAC
348 /* If the label init fails, fail the alloc */
349 if (mac_init_mbuf(m, how) != 0) {
350 m_free(m);
351/* XXX*/ panic("mb_ctor_pack(): can't deal with failure!");
352/* return 0; */
353 }
354#endif
355 }
356 mbstat.m_mbufs += 1; /* XXX */
357 mbstat.m_mclusts += 1; /* XXX */
358/* return 1;
359*/
360}
361
362/*
363 * This is the protocol drain routine.
364 *
365 * No locks should be held when this is called. The drain routines have to
366 * presently acquire some locks which raises the possibility of lock order
367 * reversal.
368 */
369static void
370mb_reclaim(void *junk)
371{
372 struct domain *dp;
373 struct protosw *pr;
374
375 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK | WARN_PANIC, NULL,
376 "mb_reclaim()");
377
378 mbstat.m_drain++;
379 for (dp = domains; dp != NULL; dp = dp->dom_next)
380 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
381 if (pr->pr_drain != NULL)
382 (*pr->pr_drain)();
383}
|