kern_mbuf.c (11e9b8bad115cf9799076d3add8824862b038563) kern_mbuf.c (099a0e588cbe1bbc56a565bf57d722621b47a866)
1/*-
1/*-
2 * Copyright (c) 2004, 2005,
3 * Bosko Milekic <bmilekic@FreeBSD.org>. All rights reserved.
2 * Copyright (c) 2004
3 * Bosko Milekic <bmilekic@FreeBSD.org>.
4 * 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.
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.
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>
29__FBSDID("$FreeBSD$");
30
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("$FreeBSD$");
34
35#include "opt_mac.h"
31#include "opt_param.h"
32
33#include <sys/param.h>
36#include "opt_param.h"
37
38#include <sys/param.h>
39#include <sys/mac.h>
34#include <sys/malloc.h>
35#include <sys/systm.h>
36#include <sys/mbuf.h>
37#include <sys/domain.h>
38#include <sys/eventhandler.h>
39#include <sys/kernel.h>
40#include <sys/protosw.h>
41#include <sys/smp.h>
42#include <sys/sysctl.h>
43
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
44#include <security/mac/mac_framework.h>
45
46#include <vm/vm.h>
50#include <vm/vm.h>
47#include <vm/vm_extern.h>
48#include <vm/vm_kern.h>
49#include <vm/vm_page.h>
50#include <vm/uma.h>
51#include <vm/vm_page.h>
52#include <vm/uma.h>
51#include <vm/uma_int.h>
52#include <vm/uma_dbg.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.

--- 10 unchanged lines hidden (view full) ---

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 ] \ /
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.

--- 10 unchanged lines hidden (view full) ---

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 ]
79 * | [ Mbuf Keg ]
80 * [ Cluster Slabs ] |
81 * | [ Mbuf Slabs ]
82 * \____________(VM)_________________/
80 * [ Cluster Slabs ] |
81 * | [ Mbuf Slabs ]
82 * \____________(VM)_________________/
83 *
84 *
85 * Whenever an object is allocated with uma_zalloc() out of
86 * one of the Zones its _ctor_ function is executed. The same
87 * for any deallocation through uma_zfree() the _dtor_ function
88 * is executed.
89 *
90 * Caches are per-CPU and are filled from the Master Zone.
91 *
92 * Whenever an object is allocated from the underlying global
93 * memory pool it gets pre-initialized with the _zinit_ functions.
94 * When the Keg's are overfull objects get decomissioned with
95 * _zfini_ functions and free'd back to the global memory pool.
96 *
97 */
98
83 */
84
99int nmbclusters; /* limits number of mbuf clusters */
100int nmbjumbop; /* limits number of page size jumbo clusters */
101int nmbjumbo9; /* limits number of 9k jumbo clusters */
102int nmbjumbo16; /* limits number of 16k jumbo clusters */
85int nmbclusters;
103struct mbstat mbstat;
104
86struct mbstat mbstat;
87
105/*
106 * tunable_mbinit() has to be run before init_maxsockets() thus
107 * the SYSINIT order below is SI_ORDER_MIDDLE while init_maxsockets()
108 * runs at SI_ORDER_ANY.
109 */
110static void
111tunable_mbinit(void *dummy)
112{
88static void
89tunable_mbinit(void *dummy)
90{
113 TUNABLE_INT_FETCH("kern.ipc.nmbclusters", &nmbclusters);
114
115 /* This has to be done before VM init. */
91
92 /* This has to be done before VM init. */
116 if (nmbclusters == 0)
117 nmbclusters = 1024 + maxusers * 64;
118 nmbjumbop = nmbclusters / 2;
119 nmbjumbo9 = nmbjumbop / 2;
120 nmbjumbo16 = nmbjumbo9 / 2;
93 nmbclusters = 1024 + maxusers * 64;
94 TUNABLE_INT_FETCH("kern.ipc.nmbclusters", &nmbclusters);
121}
95}
122SYSINIT(tunable_mbinit, SI_SUB_TUNABLES, SI_ORDER_MIDDLE, tunable_mbinit, NULL);
96SYSINIT(tunable_mbinit, SI_SUB_TUNABLES, SI_ORDER_ANY, tunable_mbinit, NULL);
123
97
124static int
125sysctl_nmbclusters(SYSCTL_HANDLER_ARGS)
126{
127 int error, newnmbclusters;
128
129 newnmbclusters = nmbclusters;
130 error = sysctl_handle_int(oidp, &newnmbclusters, 0, req);
131 if (error == 0 && req->newptr) {
132 if (newnmbclusters > nmbclusters) {
133 nmbclusters = newnmbclusters;
134 uma_zone_set_max(zone_clust, nmbclusters);
135 EVENTHANDLER_INVOKE(nmbclusters_change);
136 } else
137 error = EINVAL;
138 }
139 return (error);
140}
141SYSCTL_PROC(_kern_ipc, OID_AUTO, nmbclusters, CTLTYPE_INT|CTLFLAG_RW,
142&nmbclusters, 0, sysctl_nmbclusters, "IU",
98SYSCTL_DECL(_kern_ipc);
99SYSCTL_INT(_kern_ipc, OID_AUTO, nmbclusters, CTLFLAG_RW, &nmbclusters, 0,
143 "Maximum number of mbuf clusters allowed");
100 "Maximum number of mbuf clusters allowed");
144
145static int
146sysctl_nmbjumbop(SYSCTL_HANDLER_ARGS)
147{
148 int error, newnmbjumbop;
149
150 newnmbjumbop = nmbjumbop;
151 error = sysctl_handle_int(oidp, &newnmbjumbop, 0, req);
152 if (error == 0 && req->newptr) {
153 if (newnmbjumbop> nmbjumbop) {
154 nmbjumbop = newnmbjumbop;
155 uma_zone_set_max(zone_jumbop, nmbjumbop);
156 } else
157 error = EINVAL;
158 }
159 return (error);
160}
161SYSCTL_PROC(_kern_ipc, OID_AUTO, nmbjumbop, CTLTYPE_INT|CTLFLAG_RW,
162&nmbjumbop, 0, sysctl_nmbjumbop, "IU",
163 "Maximum number of mbuf page size jumbo clusters allowed");
164
165
166static int
167sysctl_nmbjumbo9(SYSCTL_HANDLER_ARGS)
168{
169 int error, newnmbjumbo9;
170
171 newnmbjumbo9 = nmbjumbo9;
172 error = sysctl_handle_int(oidp, &newnmbjumbo9, 0, req);
173 if (error == 0 && req->newptr) {
174 if (newnmbjumbo9> nmbjumbo9) {
175 nmbjumbo9 = newnmbjumbo9;
176 uma_zone_set_max(zone_jumbo9, nmbjumbo9);
177 } else
178 error = EINVAL;
179 }
180 return (error);
181}
182SYSCTL_PROC(_kern_ipc, OID_AUTO, nmbjumbo9, CTLTYPE_INT|CTLFLAG_RW,
183&nmbjumbo9, 0, sysctl_nmbjumbo9, "IU",
184 "Maximum number of mbuf 9k jumbo clusters allowed");
185
186static int
187sysctl_nmbjumbo16(SYSCTL_HANDLER_ARGS)
188{
189 int error, newnmbjumbo16;
190
191 newnmbjumbo16 = nmbjumbo16;
192 error = sysctl_handle_int(oidp, &newnmbjumbo16, 0, req);
193 if (error == 0 && req->newptr) {
194 if (newnmbjumbo16> nmbjumbo16) {
195 nmbjumbo16 = newnmbjumbo16;
196 uma_zone_set_max(zone_jumbo16, nmbjumbo16);
197 } else
198 error = EINVAL;
199 }
200 return (error);
201}
202SYSCTL_PROC(_kern_ipc, OID_AUTO, nmbjumbo16, CTLTYPE_INT|CTLFLAG_RW,
203&nmbjumbo16, 0, sysctl_nmbjumbo16, "IU",
204 "Maximum number of mbuf 16k jumbo clusters allowed");
205
206
207
208SYSCTL_STRUCT(_kern_ipc, OID_AUTO, mbstat, CTLFLAG_RD, &mbstat, mbstat,
209 "Mbuf general information and statistics");
210
211/*
212 * Zones from which we allocate.
213 */
214uma_zone_t zone_mbuf;
215uma_zone_t zone_clust;
216uma_zone_t zone_pack;
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;
217uma_zone_t zone_jumbop;
218uma_zone_t zone_jumbo9;
219uma_zone_t zone_jumbo16;
220uma_zone_t zone_ext_refcnt;
221
222/*
223 * Local prototypes.
224 */
110
111/*
112 * Local prototypes.
113 */
225static int mb_ctor_mbuf(void *, int, void *, int);
226static int mb_ctor_clust(void *, int, void *, int);
227static int mb_ctor_pack(void *, int, void *, int);
114static void mb_ctor_mbuf(void *, int, void *);
115static void mb_ctor_clust(void *, int, void *);
116static void mb_ctor_pack(void *, int, void *);
228static void mb_dtor_mbuf(void *, int, void *);
117static void mb_dtor_mbuf(void *, int, void *);
229static void mb_dtor_clust(void *, int, void *);
230static void mb_dtor_pack(void *, int, void *);
231static int mb_zinit_pack(void *, int, int);
232static void mb_zfini_pack(void *, int);
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);
233
234static void mb_reclaim(void *);
235static void mbuf_init(void *);
122
123static void mb_reclaim(void *);
124static void mbuf_init(void *);
236static void *mbuf_jumbo_alloc(uma_zone_t, int, u_int8_t *, int);
237
125
238/* Ensure that MSIZE doesn't break dtom() - it must be a power of 2 */
239CTASSERT((((MSIZE - 1) ^ MSIZE) + 1) >> 1 == MSIZE);
240
241/*
242 * Initialize FreeBSD Network buffer allocation.
243 */
126/*
127 * Initialize FreeBSD Network buffer allocation.
128 */
244SYSINIT(mbuf, SI_SUB_MBUF, SI_ORDER_FIRST, mbuf_init, NULL);
129SYSINIT(mbuf, SI_SUB_MBUF, SI_ORDER_FIRST, mbuf_init, NULL)
245static void
246mbuf_init(void *dummy)
247{
248
249 /*
250 * Configure UMA zones for Mbufs, Clusters, and Packets.
251 */
130static void
131mbuf_init(void *dummy)
132{
133
134 /*
135 * Configure UMA zones for Mbufs, Clusters, and Packets.
136 */
252 zone_mbuf = uma_zcreate(MBUF_MEM_NAME, MSIZE,
253 mb_ctor_mbuf, mb_dtor_mbuf,
254#ifdef INVARIANTS
255 trash_init, trash_fini,
256#else
257 NULL, NULL,
258#endif
259 MSIZE - 1, UMA_ZONE_MAXBUCKET);
260
261 zone_clust = uma_zcreate(MBUF_CLUSTER_MEM_NAME, MCLBYTES,
262 mb_ctor_clust, mb_dtor_clust,
263#ifdef INVARIANTS
264 trash_init, trash_fini,
265#else
266 NULL, NULL,
267#endif
268 UMA_ALIGN_PTR, UMA_ZONE_REFCNT);
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);
269 if (nmbclusters > 0)
270 uma_zone_set_max(zone_clust, nmbclusters);
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);
271
145
272 zone_pack = uma_zsecond_create(MBUF_PACKET_MEM_NAME, mb_ctor_pack,
273 mb_dtor_pack, mb_zinit_pack, mb_zfini_pack, zone_mbuf);
146 /* uma_prealloc() goes here */
274
147
275 /* Make jumbo frame zone too. Page size, 9k and 16k. */
276 zone_jumbop = uma_zcreate(MBUF_JUMBOP_MEM_NAME, MJUMPAGESIZE,
277 mb_ctor_clust, mb_dtor_clust,
278#ifdef INVARIANTS
279 trash_init, trash_fini,
280#else
281 NULL, NULL,
282#endif
283 UMA_ALIGN_PTR, UMA_ZONE_REFCNT);
284 if (nmbjumbop > 0)
285 uma_zone_set_max(zone_jumbop, nmbjumbop);
286
287 zone_jumbo9 = uma_zcreate(MBUF_JUMBO9_MEM_NAME, MJUM9BYTES,
288 mb_ctor_clust, mb_dtor_clust,
289#ifdef INVARIANTS
290 trash_init, trash_fini,
291#else
292 NULL, NULL,
293#endif
294 UMA_ALIGN_PTR, UMA_ZONE_REFCNT);
295 if (nmbjumbo9 > 0)
296 uma_zone_set_max(zone_jumbo9, nmbjumbo9);
297 uma_zone_set_allocf(zone_jumbo9, mbuf_jumbo_alloc);
298
299 zone_jumbo16 = uma_zcreate(MBUF_JUMBO16_MEM_NAME, MJUM16BYTES,
300 mb_ctor_clust, mb_dtor_clust,
301#ifdef INVARIANTS
302 trash_init, trash_fini,
303#else
304 NULL, NULL,
305#endif
306 UMA_ALIGN_PTR, UMA_ZONE_REFCNT);
307 if (nmbjumbo16 > 0)
308 uma_zone_set_max(zone_jumbo16, nmbjumbo16);
309 uma_zone_set_allocf(zone_jumbo16, mbuf_jumbo_alloc);
310
311 zone_ext_refcnt = uma_zcreate(MBUF_EXTREFCNT_MEM_NAME, sizeof(u_int),
312 NULL, NULL,
313 NULL, NULL,
314 UMA_ALIGN_PTR, UMA_ZONE_ZINIT);
315
316 /* uma_prealloc() goes here... */
317
318 /*
319 * Hook event handler for low-memory situation, used to
320 * drain protocols and push data back to the caches (UMA
321 * later pushes it back to VM).
322 */
323 EVENTHANDLER_REGISTER(vm_lowmem, mb_reclaim, NULL,
324 EVENTHANDLER_PRI_FIRST);
325

--- 13 unchanged lines hidden (view full) ---

339 mbstat.m_numtypes = MT_NTYPES;
340
341 mbstat.m_mcfail = mbstat.m_mpfail = 0;
342 mbstat.sf_iocnt = 0;
343 mbstat.sf_allocwait = mbstat.sf_allocfail = 0;
344}
345
346/*
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

--- 13 unchanged lines hidden (view full) ---

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/*
347 * UMA backend page allocator for the jumbo frame zones.
348 *
349 * Allocates kernel virtual memory that is backed by contiguous physical
350 * pages.
351 */
352static void *
353mbuf_jumbo_alloc(uma_zone_t zone, int bytes, u_int8_t *flags, int wait)
354{
355
356 /* Inform UMA that this allocator uses kernel_map/object. */
357 *flags = UMA_SLAB_KERNEL;
358 return ((void *)kmem_alloc_contig(kernel_map, bytes, wait,
359 (vm_paddr_t)0, ~(vm_paddr_t)0, 1, 0, VM_MEMATTR_DEFAULT));
360}
361
362/*
363 * Constructor for Mbuf master zone.
364 *
365 * The 'arg' pointer points to a mb_args structure which
366 * contains call-specific information required to support the
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
367 * mbuf allocation API. See mbuf.h.
181 * mbuf allocation API.
368 */
182 */
369static int
370mb_ctor_mbuf(void *mem, int size, void *arg, int how)
183static void
184mb_ctor_mbuf(void *mem, int size, void *arg)
371{
372 struct mbuf *m;
373 struct mb_args *args;
185{
186 struct mbuf *m;
187 struct mb_args *args;
374#ifdef MAC
375 int error;
376#endif
377 int flags;
188 int flags;
189 int how;
378 short type;
379
190 short type;
191
380#ifdef INVARIANTS
381 trash_ctor(mem, size, arg, how);
382#endif
383 m = (struct mbuf *)mem;
384 args = (struct mb_args *)arg;
385 flags = args->flags;
192 m = (struct mbuf *)mem;
193 args = (struct mb_args *)arg;
194 flags = args->flags;
195 how = args->how;
386 type = args->type;
387
196 type = args->type;
197
388 /*
389 * The mbuf is initialized later. The caller has the
390 * responsibility to set up any MAC labels too.
391 */
392 if (type == MT_NOINIT)
393 return (0);
394
198 m->m_type = type;
395 m->m_next = NULL;
396 m->m_nextpkt = NULL;
199 m->m_next = NULL;
200 m->m_nextpkt = NULL;
397 m->m_len = 0;
398 m->m_flags = flags;
399 m->m_type = type;
400 if (flags & M_PKTHDR) {
401 m->m_data = m->m_pktdat;
201 if (flags & M_PKTHDR) {
202 m->m_data = m->m_pktdat;
203 m->m_flags = M_PKTHDR;
402 m->m_pkthdr.rcvif = NULL;
204 m->m_pkthdr.rcvif = NULL;
403 m->m_pkthdr.header = NULL;
404 m->m_pkthdr.len = 0;
405 m->m_pkthdr.csum_flags = 0;
205 m->m_pkthdr.csum_flags = 0;
406 m->m_pkthdr.csum_data = 0;
407 m->m_pkthdr.tso_segsz = 0;
408 m->m_pkthdr.ether_vtag = 0;
409 m->m_pkthdr.flowid = 0;
410 SLIST_INIT(&m->m_pkthdr.tags);
411#ifdef MAC
412 /* If the label init fails, fail the alloc */
206 SLIST_INIT(&m->m_pkthdr.tags);
207#ifdef MAC
208 /* If the label init fails, fail the alloc */
413 error = mac_mbuf_init(m, how);
414 if (error)
415 return (error);
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 }
416#endif
214#endif
417 } else
215 } else {
418 m->m_data = m->m_dat;
216 m->m_data = m->m_dat;
419 return (0);
217 m->m_flags = 0;
218 }
219 mbstat.m_mbufs += 1; /* XXX */
220/* return 1;
221*/
420}
421
422/*
222}
223
224/*
423 * The Mbuf master zone destructor.
225 * The Mbuf master zone and Packet secondary zone destructor.
424 */
425static void
426mb_dtor_mbuf(void *mem, int size, void *arg)
427{
428 struct mbuf *m;
226 */
227static void
228mb_dtor_mbuf(void *mem, int size, void *arg)
229{
230 struct mbuf *m;
429 unsigned long flags;
430
431 m = (struct mbuf *)mem;
231
232 m = (struct mbuf *)mem;
432 flags = (unsigned long)arg;
433
434 if ((flags & MB_NOTAGS) == 0 && (m->m_flags & M_PKTHDR) != 0)
233 if ((m->m_flags & M_PKTHDR) != 0)
435 m_tag_delete_chain(m, NULL);
234 m_tag_delete_chain(m, NULL);
436 KASSERT((m->m_flags & M_EXT) == 0, ("%s: M_EXT set", __func__));
437 KASSERT((m->m_flags & M_NOFREE) == 0, ("%s: M_NOFREE set", __func__));
438#ifdef INVARIANTS
439 trash_dtor(mem, size, arg);
440#endif
235 mbstat.m_mbufs -= 1; /* XXX */
441}
442
236}
237
443/*
444 * The Mbuf Packet zone destructor.
445 */
238/* XXX Only because of stats */
446static void
447mb_dtor_pack(void *mem, int size, void *arg)
448{
449 struct mbuf *m;
450
451 m = (struct mbuf *)mem;
452 if ((m->m_flags & M_PKTHDR) != 0)
453 m_tag_delete_chain(m, NULL);
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);
454
455 /* Make sure we've got a clean cluster back. */
456 KASSERT((m->m_flags & M_EXT) == M_EXT, ("%s: M_EXT not set", __func__));
457 KASSERT(m->m_ext.ext_buf != NULL, ("%s: ext_buf == NULL", __func__));
458 KASSERT(m->m_ext.ext_free == NULL, ("%s: ext_free != NULL", __func__));
459 KASSERT(m->m_ext.ext_arg1 == NULL, ("%s: ext_arg1 != NULL", __func__));
460 KASSERT(m->m_ext.ext_arg2 == NULL, ("%s: ext_arg2 != NULL", __func__));
461 KASSERT(m->m_ext.ext_size == MCLBYTES, ("%s: ext_size != MCLBYTES", __func__));
462 KASSERT(m->m_ext.ext_type == EXT_PACKET, ("%s: ext_type != EXT_PACKET", __func__));
463 KASSERT(*m->m_ext.ref_cnt == 1, ("%s: ref_cnt != 1", __func__));
464#ifdef INVARIANTS
465 trash_dtor(m->m_ext.ext_buf, MCLBYTES, arg);
466#endif
467 /*
468 * If there are processes blocked on zone_clust, waiting for pages
469 * to be freed up, * cause them to be woken up by draining the
470 * packet zone. We are exposed to a race here * (in the check for
471 * the UMA_ZFLAG_FULL) where we might miss the flag set, but that
472 * is deliberate. We don't want to acquire the zone lock for every
473 * mbuf free.
474 */
475 if (uma_zone_exhausted_nolock(zone_clust))
476 zone_drain(zone_pack);
247 mbstat.m_mbufs -= 1; /* XXX */
248 mbstat.m_mclusts -= 1; /* XXX */
477}
478
479/*
249}
250
251/*
480 * The Cluster and Jumbo[PAGESIZE|9|16] zone constructor.
252 * The Cluster zone constructor.
481 *
482 * Here the 'arg' pointer points to the Mbuf which we
253 *
254 * Here the 'arg' pointer points to the Mbuf which we
483 * are configuring cluster storage for. If 'arg' is
484 * empty we allocate just the cluster without setting
485 * the mbuf to it. See mbuf.h.
255 * are configuring cluster storage for.
486 */
256 */
487static int
488mb_ctor_clust(void *mem, int size, void *arg, int how)
257static void
258mb_ctor_clust(void *mem, int size, void *arg)
489{
490 struct mbuf *m;
259{
260 struct mbuf *m;
491 u_int *refcnt;
492 int type;
493 uma_zone_t zone;
494
261
495#ifdef INVARIANTS
496 trash_ctor(mem, size, arg, how);
497#endif
498 switch (size) {
499 case MCLBYTES:
500 type = EXT_CLUSTER;
501 zone = zone_clust;
502 break;
503#if MJUMPAGESIZE != MCLBYTES
504 case MJUMPAGESIZE:
505 type = EXT_JUMBOP;
506 zone = zone_jumbop;
507 break;
508#endif
509 case MJUM9BYTES:
510 type = EXT_JUMBO9;
511 zone = zone_jumbo9;
512 break;
513 case MJUM16BYTES:
514 type = EXT_JUMBO16;
515 zone = zone_jumbo16;
516 break;
517 default:
518 panic("unknown cluster size");
519 break;
520 }
521
522 m = (struct mbuf *)arg;
262 m = (struct mbuf *)arg;
523 refcnt = uma_find_refcnt(zone, mem);
524 *refcnt = 1;
525 if (m != NULL) {
526 m->m_ext.ext_buf = (caddr_t)mem;
527 m->m_data = m->m_ext.ext_buf;
528 m->m_flags |= M_EXT;
529 m->m_ext.ext_free = NULL;
530 m->m_ext.ext_arg1 = NULL;
531 m->m_ext.ext_arg2 = NULL;
532 m->m_ext.ext_size = size;
533 m->m_ext.ext_type = type;
534 m->m_ext.ref_cnt = refcnt;
535 }
536
537 return (0);
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*/
538}
539
276}
277
540/*
541 * The Mbuf Cluster zone destructor.
542 */
278/* XXX */
543static void
544mb_dtor_clust(void *mem, int size, void *arg)
545{
279static void
280mb_dtor_clust(void *mem, int size, void *arg)
281{
546#ifdef INVARIANTS
547 uma_zone_t zone;
548
549 zone = m_getzone(size);
550 KASSERT(*(uma_find_refcnt(zone, mem)) <= 1,
551 ("%s: refcnt incorrect %u", __func__,
552 *(uma_find_refcnt(zone, mem))) );
553
554 trash_dtor(mem, size, arg);
555#endif
282 mbstat.m_mclusts -= 1; /* XXX */
556}
557
558/*
559 * The Packet secondary zone's init routine, executed on the
283}
284
285/*
286 * The Packet secondary zone's init routine, executed on the
560 * object's transition from mbuf keg slab to zone cache.
287 * object's transition from keg slab to zone cache.
561 */
288 */
562static int
563mb_zinit_pack(void *mem, int size, int how)
289static void
290mb_init_pack(void *mem, int size)
564{
565 struct mbuf *m;
566
291{
292 struct mbuf *m;
293
567 m = (struct mbuf *)mem; /* m is virgin. */
568 if (uma_zalloc_arg(zone_clust, m, how) == NULL ||
569 m->m_ext.ext_buf == NULL)
570 return (ENOMEM);
571 m->m_ext.ext_type = EXT_PACKET; /* Override. */
572#ifdef INVARIANTS
573 trash_init(m->m_ext.ext_buf, MCLBYTES, how);
574#endif
575 return (0);
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 */
576}
577
578/*
579 * The Packet secondary zone's fini routine, executed on the
580 * object's transition from zone cache to keg slab.
581 */
582static void
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
583mb_zfini_pack(void *mem, int size)
307mb_fini_pack(void *mem, int size)
584{
585 struct mbuf *m;
586
587 m = (struct mbuf *)mem;
308{
309 struct mbuf *m;
310
311 m = (struct mbuf *)mem;
588#ifdef INVARIANTS
589 trash_fini(m->m_ext.ext_buf, MCLBYTES);
590#endif
591 uma_zfree_arg(zone_clust, m->m_ext.ext_buf, NULL);
312 uma_zfree_arg(zone_clust, m->m_ext.ext_buf, NULL);
592#ifdef INVARIANTS
593 trash_dtor(mem, size, NULL);
594#endif
313 m->m_ext.ext_buf = NULL;
314 mbstat.m_mclusts += 1; /* XXX */
595}
596
597/*
598 * The "packet" keg constructor.
599 */
315}
316
317/*
318 * The "packet" keg constructor.
319 */
600static int
601mb_ctor_pack(void *mem, int size, void *arg, int how)
320static void
321mb_ctor_pack(void *mem, int size, void *arg)
602{
603 struct mbuf *m;
604 struct mb_args *args;
322{
323 struct mbuf *m;
324 struct mb_args *args;
605#ifdef MAC
606 int error;
607#endif
608 int flags;
325 int flags, how;
609 short type;
610
611 m = (struct mbuf *)mem;
612 args = (struct mb_args *)arg;
613 flags = args->flags;
614 type = args->type;
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;
615
333
616#ifdef INVARIANTS
617 trash_ctor(m->m_ext.ext_buf, MCLBYTES, arg, how);
618#endif
334 m->m_type = type;
619 m->m_next = NULL;
335 m->m_next = NULL;
620 m->m_nextpkt = NULL;
621 m->m_data = m->m_ext.ext_buf;
336 m->m_data = m->m_ext.ext_buf;
622 m->m_len = 0;
623 m->m_flags = (flags | M_EXT);
624 m->m_type = type;
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;
625
626 if (flags & M_PKTHDR) {
343
344 if (flags & M_PKTHDR) {
345 m->m_nextpkt = NULL;
627 m->m_pkthdr.rcvif = NULL;
346 m->m_pkthdr.rcvif = NULL;
628 m->m_pkthdr.len = 0;
629 m->m_pkthdr.header = NULL;
630 m->m_pkthdr.csum_flags = 0;
347 m->m_pkthdr.csum_flags = 0;
631 m->m_pkthdr.csum_data = 0;
632 m->m_pkthdr.tso_segsz = 0;
633 m->m_pkthdr.ether_vtag = 0;
634 m->m_pkthdr.flowid = 0;
635 SLIST_INIT(&m->m_pkthdr.tags);
636#ifdef MAC
637 /* If the label init fails, fail the alloc */
348 SLIST_INIT(&m->m_pkthdr.tags);
349#ifdef MAC
350 /* If the label init fails, fail the alloc */
638 error = mac_mbuf_init(m, how);
639 if (error)
640 return (error);
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 }
641#endif
642 }
356#endif
357 }
643 /* m_ext is already initialized. */
644
645 return (0);
358 mbstat.m_mbufs += 1; /* XXX */
359 mbstat.m_mclusts += 1; /* XXX */
360/* return 1;
361*/
646}
647
362}
363
648int
649m_pkthdr_init(struct mbuf *m, int how)
650{
651#ifdef MAC
652 int error;
653#endif
654 m->m_data = m->m_pktdat;
655 SLIST_INIT(&m->m_pkthdr.tags);
656 m->m_pkthdr.rcvif = NULL;
657 m->m_pkthdr.header = NULL;
658 m->m_pkthdr.len = 0;
659 m->m_pkthdr.flowid = 0;
660 m->m_pkthdr.csum_flags = 0;
661 m->m_pkthdr.csum_data = 0;
662 m->m_pkthdr.tso_segsz = 0;
663 m->m_pkthdr.ether_vtag = 0;
664#ifdef MAC
665 /* If the label init fails, fail the alloc */
666 error = mac_mbuf_init(m, how);
667 if (error)
668 return (error);
669#endif
670
671 return (0);
672}
673
674/*
675 * This is the protocol drain routine.
676 *
677 * No locks should be held when this is called. The drain routines have to
678 * presently acquire some locks which raises the possibility of lock order
679 * reversal.
680 */
681static void
682mb_reclaim(void *junk)
683{
684 struct domain *dp;
685 struct protosw *pr;
686
687 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK | WARN_PANIC, NULL,
688 "mb_reclaim()");
689
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++;
690 for (dp = domains; dp != NULL; dp = dp->dom_next)
691 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
692 if (pr->pr_drain != NULL)
693 (*pr->pr_drain)();
694}
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}