1/*-
2 * Copyright (c) 2004, 2005,
3 * Bosko Milekic <bmilekic@FreeBSD.org>. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice unmodified, this list of conditions and the following
10 * disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28#include <sys/cdefs.h>
| 1/*-
2 * Copyright (c) 2004, 2005,
3 * Bosko Milekic <bmilekic@FreeBSD.org>. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice unmodified, this list of conditions and the following
10 * disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28#include <sys/cdefs.h>
|
30
31#include "opt_mac.h"
32#include "opt_param.h"
33
34#include <sys/param.h>
35#include <sys/mac.h>
36#include <sys/malloc.h>
37#include <sys/systm.h>
38#include <sys/mbuf.h>
39#include <sys/domain.h>
40#include <sys/eventhandler.h>
41#include <sys/kernel.h>
42#include <sys/protosw.h>
43#include <sys/smp.h>
44#include <sys/sysctl.h>
45
46#include <vm/vm.h>
47#include <vm/vm_page.h>
48#include <vm/uma.h>
49#include <vm/uma_int.h>
50#include <vm/uma_dbg.h>
51
52/*
53 * In FreeBSD, Mbufs and Mbuf Clusters are allocated from UMA
54 * Zones.
55 *
56 * Mbuf Clusters (2K, contiguous) are allocated from the Cluster
57 * Zone. The Zone can be capped at kern.ipc.nmbclusters, if the
58 * administrator so desires.
59 *
60 * Mbufs are allocated from a UMA Master Zone called the Mbuf
61 * Zone.
62 *
63 * Additionally, FreeBSD provides a Packet Zone, which it
64 * configures as a Secondary Zone to the Mbuf Master Zone,
65 * thus sharing backend Slab kegs with the Mbuf Master Zone.
66 *
67 * Thus common-case allocations and locking are simplified:
68 *
69 * m_clget() m_getcl()
70 * | |
71 * | .------------>[(Packet Cache)] m_get(), m_gethdr()
72 * | | [ Packet ] |
73 * [(Cluster Cache)] [ Secondary ] [ (Mbuf Cache) ]
74 * [ Cluster Zone ] [ Zone ] [ Mbuf Master Zone ]
75 * | \________ |
76 * [ Cluster Keg ] \ /
77 * | [ Mbuf Keg ]
78 * [ Cluster Slabs ] |
79 * | [ Mbuf Slabs ]
80 * \____________(VM)_________________/
81 */
82
83int nmbclusters;
84struct mbstat mbstat;
85
86static void
87tunable_mbinit(void *dummy)
88{
89
90 /* This has to be done before VM init. */
91 nmbclusters = 1024 + maxusers * 64;
92 TUNABLE_INT_FETCH("kern.ipc.nmbclusters", &nmbclusters);
93}
94SYSINIT(tunable_mbinit, SI_SUB_TUNABLES, SI_ORDER_ANY, tunable_mbinit, NULL);
95
96SYSCTL_DECL(_kern_ipc);
97SYSCTL_INT(_kern_ipc, OID_AUTO, nmbclusters, CTLFLAG_RW, &nmbclusters, 0,
98 "Maximum number of mbuf clusters allowed");
99SYSCTL_STRUCT(_kern_ipc, OID_AUTO, mbstat, CTLFLAG_RD, &mbstat, mbstat,
100 "Mbuf general information and statistics");
101
102/*
103 * Zones from which we allocate.
104 */
105uma_zone_t zone_mbuf;
106uma_zone_t zone_clust;
107uma_zone_t zone_pack;
108
109/*
110 * Local prototypes.
111 */
112static int mb_ctor_mbuf(void *, int, void *, int);
113static int mb_ctor_clust(void *, int, void *, int);
114static int mb_ctor_pack(void *, int, void *, int);
115static void mb_dtor_mbuf(void *, int, void *);
116static void mb_dtor_clust(void *, int, void *); /* XXX */
117static void mb_dtor_pack(void *, int, void *); /* XXX */
118static int mb_init_pack(void *, int, int);
119static void mb_fini_pack(void *, int);
120
121static void mb_reclaim(void *);
122static void mbuf_init(void *);
123
124/* Ensure that MSIZE doesn't break dtom() - it must be a power of 2 */
125CTASSERT((((MSIZE - 1) ^ MSIZE) + 1) >> 1 == MSIZE);
126
127/*
128 * Initialize FreeBSD Network buffer allocation.
129 */
130SYSINIT(mbuf, SI_SUB_MBUF, SI_ORDER_FIRST, mbuf_init, NULL)
131static void
132mbuf_init(void *dummy)
133{
134
135 /*
136 * Configure UMA zones for Mbufs, Clusters, and Packets.
137 */
138 zone_mbuf = uma_zcreate("Mbuf", MSIZE, mb_ctor_mbuf, mb_dtor_mbuf,
139#ifdef INVARIANTS
140 trash_init, trash_fini, MSIZE - 1, UMA_ZONE_MAXBUCKET);
141#else
142 NULL, NULL, MSIZE - 1, UMA_ZONE_MAXBUCKET);
143#endif
144 zone_clust = uma_zcreate("MbufClust", MCLBYTES, mb_ctor_clust,
145#ifdef INVARIANTS
146 mb_dtor_clust, trash_init, trash_fini, UMA_ALIGN_PTR, UMA_ZONE_REFCNT);
147#else
148 mb_dtor_clust, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_REFCNT);
149#endif
150 if (nmbclusters > 0)
151 uma_zone_set_max(zone_clust, nmbclusters);
152 zone_pack = uma_zsecond_create("Packet", mb_ctor_pack, mb_dtor_pack,
153 mb_init_pack, mb_fini_pack, zone_mbuf);
154
155 /* uma_prealloc() goes here */
156
157 /*
158 * Hook event handler for low-memory situation, used to
159 * drain protocols and push data back to the caches (UMA
160 * later pushes it back to VM).
161 */
162 EVENTHANDLER_REGISTER(vm_lowmem, mb_reclaim, NULL,
163 EVENTHANDLER_PRI_FIRST);
164
165 /*
166 * [Re]set counters and local statistics knobs.
167 * XXX Some of these should go and be replaced, but UMA stat
168 * gathering needs to be revised.
169 */
170 mbstat.m_mbufs = 0;
171 mbstat.m_mclusts = 0;
172 mbstat.m_drain = 0;
173 mbstat.m_msize = MSIZE;
174 mbstat.m_mclbytes = MCLBYTES;
175 mbstat.m_minclsize = MINCLSIZE;
176 mbstat.m_mlen = MLEN;
177 mbstat.m_mhlen = MHLEN;
178 mbstat.m_numtypes = MT_NTYPES;
179
180 mbstat.m_mcfail = mbstat.m_mpfail = 0;
181 mbstat.sf_iocnt = 0;
182 mbstat.sf_allocwait = mbstat.sf_allocfail = 0;
183}
184
185/*
186 * Constructor for Mbuf master zone.
187 *
188 * The 'arg' pointer points to a mb_args structure which
189 * contains call-specific information required to support the
190 * mbuf allocation API.
191 */
192static int
193mb_ctor_mbuf(void *mem, int size, void *arg, int how)
194{
195 struct mbuf *m;
196 struct mb_args *args;
197#ifdef MAC
198 int error;
199#endif
200 int flags;
201 short type;
202
203#ifdef INVARIANTS
204 trash_ctor(mem, size, arg, how);
205#endif
206 m = (struct mbuf *)mem;
207 args = (struct mb_args *)arg;
208 flags = args->flags;
209 type = args->type;
210
211 m->m_type = type;
212 m->m_next = NULL;
213 m->m_nextpkt = NULL;
214 m->m_flags = flags;
215 if (flags & M_PKTHDR) {
216 m->m_data = m->m_pktdat;
217 m->m_pkthdr.rcvif = NULL;
218 m->m_pkthdr.csum_flags = 0;
219 SLIST_INIT(&m->m_pkthdr.tags);
220#ifdef MAC
221 /* If the label init fails, fail the alloc */
222 error = mac_init_mbuf(m, how);
223 if (error)
224 return (error);
225#endif
226 } else
227 m->m_data = m->m_dat;
228 mbstat.m_mbufs += 1; /* XXX */
229 return (0);
230}
231
232/*
233 * The Mbuf master zone and Packet secondary zone destructor.
234 */
235static void
236mb_dtor_mbuf(void *mem, int size, void *arg)
237{
238 struct mbuf *m;
239
240 m = (struct mbuf *)mem;
241 if ((m->m_flags & M_PKTHDR) != 0)
242 m_tag_delete_chain(m, NULL);
243#ifdef INVARIANTS
244 trash_dtor(mem, size, arg);
245#endif
246 mbstat.m_mbufs -= 1; /* XXX */
247}
248
249/* XXX Only because of stats */
250static void
251mb_dtor_pack(void *mem, int size, void *arg)
252{
253 struct mbuf *m;
254
255 m = (struct mbuf *)mem;
256 if ((m->m_flags & M_PKTHDR) != 0)
257 m_tag_delete_chain(m, NULL);
258#ifdef INVARIANTS
259 trash_dtor(m->m_ext.ext_buf, MCLBYTES, arg);
260#endif
261 mbstat.m_mbufs -= 1; /* XXX */
262 mbstat.m_mclusts -= 1; /* XXX */
263}
264
265/*
266 * The Cluster zone constructor.
267 *
268 * Here the 'arg' pointer points to the Mbuf which we
269 * are configuring cluster storage for.
270 */
271static int
272mb_ctor_clust(void *mem, int size, void *arg, int how)
273{
274 struct mbuf *m;
275
276#ifdef INVARIANTS
277 trash_ctor(mem, size, arg, how);
278#endif
279 m = (struct mbuf *)arg;
280 m->m_ext.ext_buf = (caddr_t)mem;
281 m->m_data = m->m_ext.ext_buf;
282 m->m_flags |= M_EXT;
283 m->m_ext.ext_free = NULL;
284 m->m_ext.ext_args = NULL;
285 m->m_ext.ext_size = MCLBYTES;
286 m->m_ext.ext_type = EXT_CLUSTER;
287 m->m_ext.ref_cnt = NULL; /* Lazy counter assign. */
288 mbstat.m_mclusts += 1; /* XXX */
289 return (0);
290}
291
292/* XXX */
293static void
294mb_dtor_clust(void *mem, int size, void *arg)
295{
296#ifdef INVARIANTS
297 trash_dtor(mem, size, arg);
298#endif
299 mbstat.m_mclusts -= 1; /* XXX */
300}
301
302/*
303 * The Packet secondary zone's init routine, executed on the
304 * object's transition from keg slab to zone cache.
305 */
306static int
307mb_init_pack(void *mem, int size, int how)
308{
309 struct mbuf *m;
310
311 m = (struct mbuf *)mem;
312 m->m_ext.ext_buf = NULL;
313 uma_zalloc_arg(zone_clust, m, how);
314 if (m->m_ext.ext_buf == NULL)
315 return (ENOMEM);
316#ifdef INVARIANTS
317 trash_init(m->m_ext.ext_buf, MCLBYTES, how);
318#endif
319 mbstat.m_mclusts -= 1; /* XXX */
320 return (0);
321}
322
323/*
324 * The Packet secondary zone's fini routine, executed on the
325 * object's transition from zone cache to keg slab.
326 */
327static void
328mb_fini_pack(void *mem, int size)
329{
330 struct mbuf *m;
331
332 m = (struct mbuf *)mem;
333#ifdef INVARIANTS
334 trash_fini(m->m_ext.ext_buf, MCLBYTES);
335#endif
336 uma_zfree_arg(zone_clust, m->m_ext.ext_buf, NULL);
337 m->m_ext.ext_buf = NULL;
338 mbstat.m_mclusts += 1; /* XXX */
| 30
31#include "opt_mac.h"
32#include "opt_param.h"
33
34#include <sys/param.h>
35#include <sys/mac.h>
36#include <sys/malloc.h>
37#include <sys/systm.h>
38#include <sys/mbuf.h>
39#include <sys/domain.h>
40#include <sys/eventhandler.h>
41#include <sys/kernel.h>
42#include <sys/protosw.h>
43#include <sys/smp.h>
44#include <sys/sysctl.h>
45
46#include <vm/vm.h>
47#include <vm/vm_page.h>
48#include <vm/uma.h>
49#include <vm/uma_int.h>
50#include <vm/uma_dbg.h>
51
52/*
53 * In FreeBSD, Mbufs and Mbuf Clusters are allocated from UMA
54 * Zones.
55 *
56 * Mbuf Clusters (2K, contiguous) are allocated from the Cluster
57 * Zone. The Zone can be capped at kern.ipc.nmbclusters, if the
58 * administrator so desires.
59 *
60 * Mbufs are allocated from a UMA Master Zone called the Mbuf
61 * Zone.
62 *
63 * Additionally, FreeBSD provides a Packet Zone, which it
64 * configures as a Secondary Zone to the Mbuf Master Zone,
65 * thus sharing backend Slab kegs with the Mbuf Master Zone.
66 *
67 * Thus common-case allocations and locking are simplified:
68 *
69 * m_clget() m_getcl()
70 * | |
71 * | .------------>[(Packet Cache)] m_get(), m_gethdr()
72 * | | [ Packet ] |
73 * [(Cluster Cache)] [ Secondary ] [ (Mbuf Cache) ]
74 * [ Cluster Zone ] [ Zone ] [ Mbuf Master Zone ]
75 * | \________ |
76 * [ Cluster Keg ] \ /
77 * | [ Mbuf Keg ]
78 * [ Cluster Slabs ] |
79 * | [ Mbuf Slabs ]
80 * \____________(VM)_________________/
81 */
82
83int nmbclusters;
84struct mbstat mbstat;
85
86static void
87tunable_mbinit(void *dummy)
88{
89
90 /* This has to be done before VM init. */
91 nmbclusters = 1024 + maxusers * 64;
92 TUNABLE_INT_FETCH("kern.ipc.nmbclusters", &nmbclusters);
93}
94SYSINIT(tunable_mbinit, SI_SUB_TUNABLES, SI_ORDER_ANY, tunable_mbinit, NULL);
95
96SYSCTL_DECL(_kern_ipc);
97SYSCTL_INT(_kern_ipc, OID_AUTO, nmbclusters, CTLFLAG_RW, &nmbclusters, 0,
98 "Maximum number of mbuf clusters allowed");
99SYSCTL_STRUCT(_kern_ipc, OID_AUTO, mbstat, CTLFLAG_RD, &mbstat, mbstat,
100 "Mbuf general information and statistics");
101
102/*
103 * Zones from which we allocate.
104 */
105uma_zone_t zone_mbuf;
106uma_zone_t zone_clust;
107uma_zone_t zone_pack;
108
109/*
110 * Local prototypes.
111 */
112static int mb_ctor_mbuf(void *, int, void *, int);
113static int mb_ctor_clust(void *, int, void *, int);
114static int mb_ctor_pack(void *, int, void *, int);
115static void mb_dtor_mbuf(void *, int, void *);
116static void mb_dtor_clust(void *, int, void *); /* XXX */
117static void mb_dtor_pack(void *, int, void *); /* XXX */
118static int mb_init_pack(void *, int, int);
119static void mb_fini_pack(void *, int);
120
121static void mb_reclaim(void *);
122static void mbuf_init(void *);
123
124/* Ensure that MSIZE doesn't break dtom() - it must be a power of 2 */
125CTASSERT((((MSIZE - 1) ^ MSIZE) + 1) >> 1 == MSIZE);
126
127/*
128 * Initialize FreeBSD Network buffer allocation.
129 */
130SYSINIT(mbuf, SI_SUB_MBUF, SI_ORDER_FIRST, mbuf_init, NULL)
131static void
132mbuf_init(void *dummy)
133{
134
135 /*
136 * Configure UMA zones for Mbufs, Clusters, and Packets.
137 */
138 zone_mbuf = uma_zcreate("Mbuf", MSIZE, mb_ctor_mbuf, mb_dtor_mbuf,
139#ifdef INVARIANTS
140 trash_init, trash_fini, MSIZE - 1, UMA_ZONE_MAXBUCKET);
141#else
142 NULL, NULL, MSIZE - 1, UMA_ZONE_MAXBUCKET);
143#endif
144 zone_clust = uma_zcreate("MbufClust", MCLBYTES, mb_ctor_clust,
145#ifdef INVARIANTS
146 mb_dtor_clust, trash_init, trash_fini, UMA_ALIGN_PTR, UMA_ZONE_REFCNT);
147#else
148 mb_dtor_clust, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_REFCNT);
149#endif
150 if (nmbclusters > 0)
151 uma_zone_set_max(zone_clust, nmbclusters);
152 zone_pack = uma_zsecond_create("Packet", mb_ctor_pack, mb_dtor_pack,
153 mb_init_pack, mb_fini_pack, zone_mbuf);
154
155 /* uma_prealloc() goes here */
156
157 /*
158 * Hook event handler for low-memory situation, used to
159 * drain protocols and push data back to the caches (UMA
160 * later pushes it back to VM).
161 */
162 EVENTHANDLER_REGISTER(vm_lowmem, mb_reclaim, NULL,
163 EVENTHANDLER_PRI_FIRST);
164
165 /*
166 * [Re]set counters and local statistics knobs.
167 * XXX Some of these should go and be replaced, but UMA stat
168 * gathering needs to be revised.
169 */
170 mbstat.m_mbufs = 0;
171 mbstat.m_mclusts = 0;
172 mbstat.m_drain = 0;
173 mbstat.m_msize = MSIZE;
174 mbstat.m_mclbytes = MCLBYTES;
175 mbstat.m_minclsize = MINCLSIZE;
176 mbstat.m_mlen = MLEN;
177 mbstat.m_mhlen = MHLEN;
178 mbstat.m_numtypes = MT_NTYPES;
179
180 mbstat.m_mcfail = mbstat.m_mpfail = 0;
181 mbstat.sf_iocnt = 0;
182 mbstat.sf_allocwait = mbstat.sf_allocfail = 0;
183}
184
185/*
186 * Constructor for Mbuf master zone.
187 *
188 * The 'arg' pointer points to a mb_args structure which
189 * contains call-specific information required to support the
190 * mbuf allocation API.
191 */
192static int
193mb_ctor_mbuf(void *mem, int size, void *arg, int how)
194{
195 struct mbuf *m;
196 struct mb_args *args;
197#ifdef MAC
198 int error;
199#endif
200 int flags;
201 short type;
202
203#ifdef INVARIANTS
204 trash_ctor(mem, size, arg, how);
205#endif
206 m = (struct mbuf *)mem;
207 args = (struct mb_args *)arg;
208 flags = args->flags;
209 type = args->type;
210
211 m->m_type = type;
212 m->m_next = NULL;
213 m->m_nextpkt = NULL;
214 m->m_flags = flags;
215 if (flags & M_PKTHDR) {
216 m->m_data = m->m_pktdat;
217 m->m_pkthdr.rcvif = NULL;
218 m->m_pkthdr.csum_flags = 0;
219 SLIST_INIT(&m->m_pkthdr.tags);
220#ifdef MAC
221 /* If the label init fails, fail the alloc */
222 error = mac_init_mbuf(m, how);
223 if (error)
224 return (error);
225#endif
226 } else
227 m->m_data = m->m_dat;
228 mbstat.m_mbufs += 1; /* XXX */
229 return (0);
230}
231
232/*
233 * The Mbuf master zone and Packet secondary zone destructor.
234 */
235static void
236mb_dtor_mbuf(void *mem, int size, void *arg)
237{
238 struct mbuf *m;
239
240 m = (struct mbuf *)mem;
241 if ((m->m_flags & M_PKTHDR) != 0)
242 m_tag_delete_chain(m, NULL);
243#ifdef INVARIANTS
244 trash_dtor(mem, size, arg);
245#endif
246 mbstat.m_mbufs -= 1; /* XXX */
247}
248
249/* XXX Only because of stats */
250static void
251mb_dtor_pack(void *mem, int size, void *arg)
252{
253 struct mbuf *m;
254
255 m = (struct mbuf *)mem;
256 if ((m->m_flags & M_PKTHDR) != 0)
257 m_tag_delete_chain(m, NULL);
258#ifdef INVARIANTS
259 trash_dtor(m->m_ext.ext_buf, MCLBYTES, arg);
260#endif
261 mbstat.m_mbufs -= 1; /* XXX */
262 mbstat.m_mclusts -= 1; /* XXX */
263}
264
265/*
266 * The Cluster zone constructor.
267 *
268 * Here the 'arg' pointer points to the Mbuf which we
269 * are configuring cluster storage for.
270 */
271static int
272mb_ctor_clust(void *mem, int size, void *arg, int how)
273{
274 struct mbuf *m;
275
276#ifdef INVARIANTS
277 trash_ctor(mem, size, arg, how);
278#endif
279 m = (struct mbuf *)arg;
280 m->m_ext.ext_buf = (caddr_t)mem;
281 m->m_data = m->m_ext.ext_buf;
282 m->m_flags |= M_EXT;
283 m->m_ext.ext_free = NULL;
284 m->m_ext.ext_args = NULL;
285 m->m_ext.ext_size = MCLBYTES;
286 m->m_ext.ext_type = EXT_CLUSTER;
287 m->m_ext.ref_cnt = NULL; /* Lazy counter assign. */
288 mbstat.m_mclusts += 1; /* XXX */
289 return (0);
290}
291
292/* XXX */
293static void
294mb_dtor_clust(void *mem, int size, void *arg)
295{
296#ifdef INVARIANTS
297 trash_dtor(mem, size, arg);
298#endif
299 mbstat.m_mclusts -= 1; /* XXX */
300}
301
302/*
303 * The Packet secondary zone's init routine, executed on the
304 * object's transition from keg slab to zone cache.
305 */
306static int
307mb_init_pack(void *mem, int size, int how)
308{
309 struct mbuf *m;
310
311 m = (struct mbuf *)mem;
312 m->m_ext.ext_buf = NULL;
313 uma_zalloc_arg(zone_clust, m, how);
314 if (m->m_ext.ext_buf == NULL)
315 return (ENOMEM);
316#ifdef INVARIANTS
317 trash_init(m->m_ext.ext_buf, MCLBYTES, how);
318#endif
319 mbstat.m_mclusts -= 1; /* XXX */
320 return (0);
321}
322
323/*
324 * The Packet secondary zone's fini routine, executed on the
325 * object's transition from zone cache to keg slab.
326 */
327static void
328mb_fini_pack(void *mem, int size)
329{
330 struct mbuf *m;
331
332 m = (struct mbuf *)mem;
333#ifdef INVARIANTS
334 trash_fini(m->m_ext.ext_buf, MCLBYTES);
335#endif
336 uma_zfree_arg(zone_clust, m->m_ext.ext_buf, NULL);
337 m->m_ext.ext_buf = NULL;
338 mbstat.m_mclusts += 1; /* XXX */
|