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>
|
29__FBSDID("$FreeBSD: head/sys/kern/kern_mbuf.c 155051 2006-01-30 13:45:15Z glebius $");
| 29__FBSDID("$FreeBSD: head/sys/kern/kern_mbuf.c 155780 2006-02-17 14:14:15Z andre $");
|
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 * 83 * Whenever a object is allocated with uma_zalloc() out of the 84 * one of the Zones its _ctor_ function is executed. The same 85 * for any deallocation through uma_zfree() the _dror_ function 86 * is executed. 87 * 88 * Caches are per-CPU and are filled from the Master Zone. 89 * 90 * Whenever a object is allocated from the underlying global 91 * memory pool it gets pre-initialized with the _zinit_ functions. 92 * When the Keg's are overfull objects get decomissioned with 93 * _zfini_ functions and free'd back to the global memory pool. 94 * 95 */ 96 97int nmbclusters; /* limits number of mbuf clusters */
| 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 * 83 * Whenever a object is allocated with uma_zalloc() out of the 84 * one of the Zones its _ctor_ function is executed. The same 85 * for any deallocation through uma_zfree() the _dror_ function 86 * is executed. 87 * 88 * Caches are per-CPU and are filled from the Master Zone. 89 * 90 * Whenever a object is allocated from the underlying global 91 * memory pool it gets pre-initialized with the _zinit_ functions. 92 * When the Keg's are overfull objects get decomissioned with 93 * _zfini_ functions and free'd back to the global memory pool. 94 * 95 */ 96 97int nmbclusters; /* limits number of mbuf clusters */
|
98int nmbjumbo4; /* limits number of 4k jumbo clusters */
| 98int nmbjumbop; /* limits number of page size jumbo clusters */
|
99int nmbjumbo9; /* limits number of 9k jumbo clusters */ 100int nmbjumbo16; /* limits number of 16k jumbo clusters */ 101struct mbstat mbstat; 102 103static void 104tunable_mbinit(void *dummy) 105{ 106 107 /* This has to be done before VM init. */ 108 nmbclusters = 1024 + maxusers * 64; 109 TUNABLE_INT_FETCH("kern.ipc.nmbclusters", &nmbclusters); 110} 111SYSINIT(tunable_mbinit, SI_SUB_TUNABLES, SI_ORDER_ANY, tunable_mbinit, NULL); 112 113SYSCTL_DECL(_kern_ipc); 114/* XXX: These should be tuneables. Can't change UMA limits on the fly. */ 115SYSCTL_INT(_kern_ipc, OID_AUTO, nmbclusters, CTLFLAG_RW, &nmbclusters, 0, 116 "Maximum number of mbuf clusters allowed");
| 99int nmbjumbo9; /* limits number of 9k jumbo clusters */ 100int nmbjumbo16; /* limits number of 16k jumbo clusters */ 101struct mbstat mbstat; 102 103static void 104tunable_mbinit(void *dummy) 105{ 106 107 /* This has to be done before VM init. */ 108 nmbclusters = 1024 + maxusers * 64; 109 TUNABLE_INT_FETCH("kern.ipc.nmbclusters", &nmbclusters); 110} 111SYSINIT(tunable_mbinit, SI_SUB_TUNABLES, SI_ORDER_ANY, tunable_mbinit, NULL); 112 113SYSCTL_DECL(_kern_ipc); 114/* XXX: These should be tuneables. Can't change UMA limits on the fly. */ 115SYSCTL_INT(_kern_ipc, OID_AUTO, nmbclusters, CTLFLAG_RW, &nmbclusters, 0, 116 "Maximum number of mbuf clusters allowed");
|
117SYSCTL_INT(_kern_ipc, OID_AUTO, nmbjumbo4, CTLFLAG_RW, &nmbjumbo4, 0, 118 "Maximum number of mbuf 4k jumbo clusters allowed");
| 117SYSCTL_INT(_kern_ipc, OID_AUTO, nmbjumbop, CTLFLAG_RW, &nmbjumbop, 0, 118 "Maximum number of mbuf page size jumbo clusters allowed");
|
119SYSCTL_INT(_kern_ipc, OID_AUTO, nmbjumbo9, CTLFLAG_RW, &nmbjumbo9, 0, 120 "Maximum number of mbuf 9k jumbo clusters allowed"); 121SYSCTL_INT(_kern_ipc, OID_AUTO, nmbjumbo16, CTLFLAG_RW, &nmbjumbo16, 0, 122 "Maximum number of mbuf 16k jumbo clusters allowed"); 123SYSCTL_STRUCT(_kern_ipc, OID_AUTO, mbstat, CTLFLAG_RD, &mbstat, mbstat, 124 "Mbuf general information and statistics"); 125 126/* 127 * Zones from which we allocate. 128 */ 129uma_zone_t zone_mbuf; 130uma_zone_t zone_clust; 131uma_zone_t zone_pack;
| 119SYSCTL_INT(_kern_ipc, OID_AUTO, nmbjumbo9, CTLFLAG_RW, &nmbjumbo9, 0, 120 "Maximum number of mbuf 9k jumbo clusters allowed"); 121SYSCTL_INT(_kern_ipc, OID_AUTO, nmbjumbo16, CTLFLAG_RW, &nmbjumbo16, 0, 122 "Maximum number of mbuf 16k jumbo clusters allowed"); 123SYSCTL_STRUCT(_kern_ipc, OID_AUTO, mbstat, CTLFLAG_RD, &mbstat, mbstat, 124 "Mbuf general information and statistics"); 125 126/* 127 * Zones from which we allocate. 128 */ 129uma_zone_t zone_mbuf; 130uma_zone_t zone_clust; 131uma_zone_t zone_pack;
|
132uma_zone_t zone_jumbo4;
| 132uma_zone_t zone_jumbop;
|
133uma_zone_t zone_jumbo9; 134uma_zone_t zone_jumbo16; 135uma_zone_t zone_ext_refcnt; 136uma_zone_t zone_mtag_vlan; 137 138/* 139 * Local prototypes. 140 */ 141static int mb_ctor_mbuf(void *, int, void *, int); 142static int mb_ctor_clust(void *, int, void *, int); 143static int mb_ctor_pack(void *, int, void *, int); 144static void mb_dtor_mbuf(void *, int, void *); 145static void mb_dtor_clust(void *, int, void *); 146static void mb_dtor_pack(void *, int, void *); 147static int mb_zinit_pack(void *, int, int); 148static void mb_zfini_pack(void *, int); 149static int mt_zinit_vlan(void *, int, int); 150 151static void mb_reclaim(void *); 152static void mbuf_init(void *); 153 154/* Ensure that MSIZE doesn't break dtom() - it must be a power of 2 */ 155CTASSERT((((MSIZE - 1) ^ MSIZE) + 1) >> 1 == MSIZE); 156 157/* 158 * Initialize FreeBSD Network buffer allocation. 159 */ 160SYSINIT(mbuf, SI_SUB_MBUF, SI_ORDER_FIRST, mbuf_init, NULL) 161static void 162mbuf_init(void *dummy) 163{ 164 165 /* 166 * Configure UMA zones for Mbufs, Clusters, and Packets. 167 */ 168 zone_mbuf = uma_zcreate(MBUF_MEM_NAME, MSIZE, 169 mb_ctor_mbuf, mb_dtor_mbuf, 170#ifdef INVARIANTS 171 trash_init, trash_fini, 172#else 173 NULL, NULL, 174#endif 175 MSIZE - 1, UMA_ZONE_MAXBUCKET); 176 177 zone_clust = uma_zcreate(MBUF_CLUSTER_MEM_NAME, MCLBYTES, 178 mb_ctor_clust, mb_dtor_clust, 179#ifdef INVARIANTS 180 trash_init, trash_fini, 181#else 182 NULL, NULL, 183#endif 184 UMA_ALIGN_PTR, UMA_ZONE_REFCNT); 185 if (nmbclusters > 0) 186 uma_zone_set_max(zone_clust, nmbclusters); 187 188 zone_pack = uma_zsecond_create(MBUF_PACKET_MEM_NAME, mb_ctor_pack, 189 mb_dtor_pack, mb_zinit_pack, mb_zfini_pack, zone_mbuf); 190 191 /* Make jumbo frame zone too. 4k, 9k and 16k. */
| 133uma_zone_t zone_jumbo9; 134uma_zone_t zone_jumbo16; 135uma_zone_t zone_ext_refcnt; 136uma_zone_t zone_mtag_vlan; 137 138/* 139 * Local prototypes. 140 */ 141static int mb_ctor_mbuf(void *, int, void *, int); 142static int mb_ctor_clust(void *, int, void *, int); 143static int mb_ctor_pack(void *, int, void *, int); 144static void mb_dtor_mbuf(void *, int, void *); 145static void mb_dtor_clust(void *, int, void *); 146static void mb_dtor_pack(void *, int, void *); 147static int mb_zinit_pack(void *, int, int); 148static void mb_zfini_pack(void *, int); 149static int mt_zinit_vlan(void *, int, int); 150 151static void mb_reclaim(void *); 152static void mbuf_init(void *); 153 154/* Ensure that MSIZE doesn't break dtom() - it must be a power of 2 */ 155CTASSERT((((MSIZE - 1) ^ MSIZE) + 1) >> 1 == MSIZE); 156 157/* 158 * Initialize FreeBSD Network buffer allocation. 159 */ 160SYSINIT(mbuf, SI_SUB_MBUF, SI_ORDER_FIRST, mbuf_init, NULL) 161static void 162mbuf_init(void *dummy) 163{ 164 165 /* 166 * Configure UMA zones for Mbufs, Clusters, and Packets. 167 */ 168 zone_mbuf = uma_zcreate(MBUF_MEM_NAME, MSIZE, 169 mb_ctor_mbuf, mb_dtor_mbuf, 170#ifdef INVARIANTS 171 trash_init, trash_fini, 172#else 173 NULL, NULL, 174#endif 175 MSIZE - 1, UMA_ZONE_MAXBUCKET); 176 177 zone_clust = uma_zcreate(MBUF_CLUSTER_MEM_NAME, MCLBYTES, 178 mb_ctor_clust, mb_dtor_clust, 179#ifdef INVARIANTS 180 trash_init, trash_fini, 181#else 182 NULL, NULL, 183#endif 184 UMA_ALIGN_PTR, UMA_ZONE_REFCNT); 185 if (nmbclusters > 0) 186 uma_zone_set_max(zone_clust, nmbclusters); 187 188 zone_pack = uma_zsecond_create(MBUF_PACKET_MEM_NAME, mb_ctor_pack, 189 mb_dtor_pack, mb_zinit_pack, mb_zfini_pack, zone_mbuf); 190 191 /* Make jumbo frame zone too. 4k, 9k and 16k. */
|
192 zone_jumbo4 = uma_zcreate(MBUF_JUMBO4_MEM_NAME, MJUM4BYTES,
| 192 zone_jumbop = uma_zcreate(MBUF_JUMBOP_MEM_NAME, MJUMPAGESIZE,
|
193 mb_ctor_clust, mb_dtor_clust, 194#ifdef INVARIANTS 195 trash_init, trash_fini, 196#else 197 NULL, NULL, 198#endif 199 UMA_ALIGN_PTR, UMA_ZONE_REFCNT);
| 193 mb_ctor_clust, mb_dtor_clust, 194#ifdef INVARIANTS 195 trash_init, trash_fini, 196#else 197 NULL, NULL, 198#endif 199 UMA_ALIGN_PTR, UMA_ZONE_REFCNT);
|
200 if (nmbjumbo4 > 0) 201 uma_zone_set_max(zone_jumbo4, nmbjumbo4);
| 200 if (nmbjumbop > 0) 201 uma_zone_set_max(zone_jumbop, nmbjumbop);
|
202 203 zone_jumbo9 = uma_zcreate(MBUF_JUMBO9_MEM_NAME, MJUM9BYTES, 204 mb_ctor_clust, mb_dtor_clust, 205#ifdef INVARIANTS 206 trash_init, trash_fini, 207#else 208 NULL, NULL, 209#endif 210 UMA_ALIGN_PTR, UMA_ZONE_REFCNT); 211 if (nmbjumbo9 > 0) 212 uma_zone_set_max(zone_jumbo9, nmbjumbo9); 213 214 zone_jumbo16 = uma_zcreate(MBUF_JUMBO16_MEM_NAME, MJUM16BYTES, 215 mb_ctor_clust, mb_dtor_clust, 216#ifdef INVARIANTS 217 trash_init, trash_fini, 218#else 219 NULL, NULL, 220#endif 221 UMA_ALIGN_PTR, UMA_ZONE_REFCNT); 222 if (nmbjumbo16 > 0) 223 uma_zone_set_max(zone_jumbo16, nmbjumbo16); 224 225 zone_ext_refcnt = uma_zcreate(MBUF_EXTREFCNT_MEM_NAME, sizeof(u_int), 226 NULL, NULL, 227 NULL, NULL, 228 UMA_ALIGN_PTR, UMA_ZONE_ZINIT); 229 230 zone_mtag_vlan = uma_zcreate("mtag_vlan", 231 sizeof(struct m_tag) + sizeof(u_int), 232 NULL, NULL, 233 mt_zinit_vlan, NULL, 234 UMA_ALIGN_INT, 0); 235 236 /* uma_prealloc() goes here... */ 237 238 /* 239 * Hook event handler for low-memory situation, used to 240 * drain protocols and push data back to the caches (UMA 241 * later pushes it back to VM). 242 */ 243 EVENTHANDLER_REGISTER(vm_lowmem, mb_reclaim, NULL, 244 EVENTHANDLER_PRI_FIRST); 245 246 /* 247 * [Re]set counters and local statistics knobs. 248 * XXX Some of these should go and be replaced, but UMA stat 249 * gathering needs to be revised. 250 */ 251 mbstat.m_mbufs = 0; 252 mbstat.m_mclusts = 0; 253 mbstat.m_drain = 0; 254 mbstat.m_msize = MSIZE; 255 mbstat.m_mclbytes = MCLBYTES; 256 mbstat.m_minclsize = MINCLSIZE; 257 mbstat.m_mlen = MLEN; 258 mbstat.m_mhlen = MHLEN; 259 mbstat.m_numtypes = MT_NTYPES; 260 261 mbstat.m_mcfail = mbstat.m_mpfail = 0; 262 mbstat.sf_iocnt = 0; 263 mbstat.sf_allocwait = mbstat.sf_allocfail = 0; 264} 265 266/* 267 * Constructor for Mbuf master zone. 268 * 269 * The 'arg' pointer points to a mb_args structure which 270 * contains call-specific information required to support the 271 * mbuf allocation API. See mbuf.h. 272 */ 273static int 274mb_ctor_mbuf(void *mem, int size, void *arg, int how) 275{ 276 struct mbuf *m; 277 struct mb_args *args; 278#ifdef MAC 279 int error; 280#endif 281 int flags; 282 short type; 283 284#ifdef INVARIANTS 285 trash_ctor(mem, size, arg, how); 286#endif 287 m = (struct mbuf *)mem; 288 args = (struct mb_args *)arg; 289 flags = args->flags; 290 type = args->type; 291 292 /* 293 * The mbuf is initialized later. The caller has the 294 * responseability to setup any MAC labels too. 295 */ 296 if (type == MT_NOINIT) 297 return (0); 298 299 m->m_next = NULL; 300 m->m_nextpkt = NULL; 301 m->m_len = 0; 302 m->m_flags = flags; 303 m->m_type = type; 304 if (flags & M_PKTHDR) { 305 m->m_data = m->m_pktdat; 306 m->m_pkthdr.rcvif = NULL; 307 m->m_pkthdr.len = 0; 308 m->m_pkthdr.header = NULL; 309 m->m_pkthdr.csum_flags = 0; 310 m->m_pkthdr.csum_data = 0; 311 SLIST_INIT(&m->m_pkthdr.tags); 312#ifdef MAC 313 /* If the label init fails, fail the alloc */ 314 error = mac_init_mbuf(m, how); 315 if (error) 316 return (error); 317#endif 318 } else 319 m->m_data = m->m_dat; 320 return (0); 321} 322 323/* 324 * The Mbuf master zone destructor. 325 */ 326static void 327mb_dtor_mbuf(void *mem, int size, void *arg) 328{ 329 struct mbuf *m; 330 331 m = (struct mbuf *)mem; 332 if ((m->m_flags & M_PKTHDR) != 0) 333 m_tag_delete_chain(m, NULL); 334 KASSERT((m->m_flags & M_EXT) == 0, ("%s: M_EXT set", __func__)); 335#ifdef INVARIANTS 336 trash_dtor(mem, size, arg); 337#endif 338} 339 340/* 341 * The Mbuf Packet zone destructor. 342 */ 343static void 344mb_dtor_pack(void *mem, int size, void *arg) 345{ 346 struct mbuf *m; 347 348 m = (struct mbuf *)mem; 349 if ((m->m_flags & M_PKTHDR) != 0) 350 m_tag_delete_chain(m, NULL); 351 352 /* Make sure we've got a clean cluster back. */ 353 KASSERT((m->m_flags & M_EXT) == M_EXT, ("%s: M_EXT not set", __func__)); 354 KASSERT(m->m_ext.ext_buf != NULL, ("%s: ext_buf == NULL", __func__)); 355 KASSERT(m->m_ext.ext_free == NULL, ("%s: ext_free != NULL", __func__)); 356 KASSERT(m->m_ext.ext_args == NULL, ("%s: ext_args != NULL", __func__)); 357 KASSERT(m->m_ext.ext_size == MCLBYTES, ("%s: ext_size != MCLBYTES", __func__)); 358 KASSERT(m->m_ext.ext_type == EXT_PACKET, ("%s: ext_type != EXT_PACKET", __func__)); 359 KASSERT(*m->m_ext.ref_cnt == 1, ("%s: ref_cnt != 1", __func__)); 360#ifdef INVARIANTS 361 trash_dtor(m->m_ext.ext_buf, MCLBYTES, arg); 362#endif 363} 364 365/*
| 202 203 zone_jumbo9 = uma_zcreate(MBUF_JUMBO9_MEM_NAME, MJUM9BYTES, 204 mb_ctor_clust, mb_dtor_clust, 205#ifdef INVARIANTS 206 trash_init, trash_fini, 207#else 208 NULL, NULL, 209#endif 210 UMA_ALIGN_PTR, UMA_ZONE_REFCNT); 211 if (nmbjumbo9 > 0) 212 uma_zone_set_max(zone_jumbo9, nmbjumbo9); 213 214 zone_jumbo16 = uma_zcreate(MBUF_JUMBO16_MEM_NAME, MJUM16BYTES, 215 mb_ctor_clust, mb_dtor_clust, 216#ifdef INVARIANTS 217 trash_init, trash_fini, 218#else 219 NULL, NULL, 220#endif 221 UMA_ALIGN_PTR, UMA_ZONE_REFCNT); 222 if (nmbjumbo16 > 0) 223 uma_zone_set_max(zone_jumbo16, nmbjumbo16); 224 225 zone_ext_refcnt = uma_zcreate(MBUF_EXTREFCNT_MEM_NAME, sizeof(u_int), 226 NULL, NULL, 227 NULL, NULL, 228 UMA_ALIGN_PTR, UMA_ZONE_ZINIT); 229 230 zone_mtag_vlan = uma_zcreate("mtag_vlan", 231 sizeof(struct m_tag) + sizeof(u_int), 232 NULL, NULL, 233 mt_zinit_vlan, NULL, 234 UMA_ALIGN_INT, 0); 235 236 /* uma_prealloc() goes here... */ 237 238 /* 239 * Hook event handler for low-memory situation, used to 240 * drain protocols and push data back to the caches (UMA 241 * later pushes it back to VM). 242 */ 243 EVENTHANDLER_REGISTER(vm_lowmem, mb_reclaim, NULL, 244 EVENTHANDLER_PRI_FIRST); 245 246 /* 247 * [Re]set counters and local statistics knobs. 248 * XXX Some of these should go and be replaced, but UMA stat 249 * gathering needs to be revised. 250 */ 251 mbstat.m_mbufs = 0; 252 mbstat.m_mclusts = 0; 253 mbstat.m_drain = 0; 254 mbstat.m_msize = MSIZE; 255 mbstat.m_mclbytes = MCLBYTES; 256 mbstat.m_minclsize = MINCLSIZE; 257 mbstat.m_mlen = MLEN; 258 mbstat.m_mhlen = MHLEN; 259 mbstat.m_numtypes = MT_NTYPES; 260 261 mbstat.m_mcfail = mbstat.m_mpfail = 0; 262 mbstat.sf_iocnt = 0; 263 mbstat.sf_allocwait = mbstat.sf_allocfail = 0; 264} 265 266/* 267 * Constructor for Mbuf master zone. 268 * 269 * The 'arg' pointer points to a mb_args structure which 270 * contains call-specific information required to support the 271 * mbuf allocation API. See mbuf.h. 272 */ 273static int 274mb_ctor_mbuf(void *mem, int size, void *arg, int how) 275{ 276 struct mbuf *m; 277 struct mb_args *args; 278#ifdef MAC 279 int error; 280#endif 281 int flags; 282 short type; 283 284#ifdef INVARIANTS 285 trash_ctor(mem, size, arg, how); 286#endif 287 m = (struct mbuf *)mem; 288 args = (struct mb_args *)arg; 289 flags = args->flags; 290 type = args->type; 291 292 /* 293 * The mbuf is initialized later. The caller has the 294 * responseability to setup any MAC labels too. 295 */ 296 if (type == MT_NOINIT) 297 return (0); 298 299 m->m_next = NULL; 300 m->m_nextpkt = NULL; 301 m->m_len = 0; 302 m->m_flags = flags; 303 m->m_type = type; 304 if (flags & M_PKTHDR) { 305 m->m_data = m->m_pktdat; 306 m->m_pkthdr.rcvif = NULL; 307 m->m_pkthdr.len = 0; 308 m->m_pkthdr.header = NULL; 309 m->m_pkthdr.csum_flags = 0; 310 m->m_pkthdr.csum_data = 0; 311 SLIST_INIT(&m->m_pkthdr.tags); 312#ifdef MAC 313 /* If the label init fails, fail the alloc */ 314 error = mac_init_mbuf(m, how); 315 if (error) 316 return (error); 317#endif 318 } else 319 m->m_data = m->m_dat; 320 return (0); 321} 322 323/* 324 * The Mbuf master zone destructor. 325 */ 326static void 327mb_dtor_mbuf(void *mem, int size, void *arg) 328{ 329 struct mbuf *m; 330 331 m = (struct mbuf *)mem; 332 if ((m->m_flags & M_PKTHDR) != 0) 333 m_tag_delete_chain(m, NULL); 334 KASSERT((m->m_flags & M_EXT) == 0, ("%s: M_EXT set", __func__)); 335#ifdef INVARIANTS 336 trash_dtor(mem, size, arg); 337#endif 338} 339 340/* 341 * The Mbuf Packet zone destructor. 342 */ 343static void 344mb_dtor_pack(void *mem, int size, void *arg) 345{ 346 struct mbuf *m; 347 348 m = (struct mbuf *)mem; 349 if ((m->m_flags & M_PKTHDR) != 0) 350 m_tag_delete_chain(m, NULL); 351 352 /* Make sure we've got a clean cluster back. */ 353 KASSERT((m->m_flags & M_EXT) == M_EXT, ("%s: M_EXT not set", __func__)); 354 KASSERT(m->m_ext.ext_buf != NULL, ("%s: ext_buf == NULL", __func__)); 355 KASSERT(m->m_ext.ext_free == NULL, ("%s: ext_free != NULL", __func__)); 356 KASSERT(m->m_ext.ext_args == NULL, ("%s: ext_args != NULL", __func__)); 357 KASSERT(m->m_ext.ext_size == MCLBYTES, ("%s: ext_size != MCLBYTES", __func__)); 358 KASSERT(m->m_ext.ext_type == EXT_PACKET, ("%s: ext_type != EXT_PACKET", __func__)); 359 KASSERT(*m->m_ext.ref_cnt == 1, ("%s: ref_cnt != 1", __func__)); 360#ifdef INVARIANTS 361 trash_dtor(m->m_ext.ext_buf, MCLBYTES, arg); 362#endif 363} 364 365/*
|
366 * The Cluster and Jumbo[9|16] zone constructor.
| 366 * The Cluster and Jumbo[PAGESIZE|9|16] zone constructor.
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367 * 368 * Here the 'arg' pointer points to the Mbuf which we 369 * are configuring cluster storage for. If 'arg' is 370 * empty we allocate just the cluster without setting 371 * the mbuf to it. See mbuf.h. 372 */ 373static int 374mb_ctor_clust(void *mem, int size, void *arg, int how) 375{ 376 struct mbuf *m; 377 u_int *refcnt; 378 int type = 0; 379 380#ifdef INVARIANTS 381 trash_ctor(mem, size, arg, how); 382#endif 383 m = (struct mbuf *)arg; 384 if (m != NULL) { 385 switch (size) { 386 case MCLBYTES: 387 type = EXT_CLUSTER; 388 break;
| 367 * 368 * Here the 'arg' pointer points to the Mbuf which we 369 * are configuring cluster storage for. If 'arg' is 370 * empty we allocate just the cluster without setting 371 * the mbuf to it. See mbuf.h. 372 */ 373static int 374mb_ctor_clust(void *mem, int size, void *arg, int how) 375{ 376 struct mbuf *m; 377 u_int *refcnt; 378 int type = 0; 379 380#ifdef INVARIANTS 381 trash_ctor(mem, size, arg, how); 382#endif 383 m = (struct mbuf *)arg; 384 if (m != NULL) { 385 switch (size) { 386 case MCLBYTES: 387 type = EXT_CLUSTER; 388 break;
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389#if MJUM4BYTES != MCLBYTES 390 case MJUM4BYTES: 391 type = EXT_JUMBO4;
| 389#if MJUMPAGESIZE != MCLBYTES 390 case MJUMPAGESIZE: 391 type = EXT_JUMBOP;
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392 break; 393#endif 394 case MJUM9BYTES: 395 type = EXT_JUMBO9; 396 break; 397 case MJUM16BYTES: 398 type = EXT_JUMBO16; 399 break; 400 default: 401 panic("unknown cluster size"); 402 break; 403 } 404 m->m_ext.ext_buf = (caddr_t)mem; 405 m->m_data = m->m_ext.ext_buf; 406 m->m_flags |= M_EXT; 407 m->m_ext.ext_free = NULL; 408 m->m_ext.ext_args = NULL; 409 m->m_ext.ext_size = size; 410 m->m_ext.ext_type = type; 411 m->m_ext.ref_cnt = uma_find_refcnt(zone_clust, mem); 412 *m->m_ext.ref_cnt = 1; 413 } else { 414 refcnt = uma_find_refcnt(zone_clust, mem); 415 *refcnt = 1; 416 } 417 return (0); 418} 419 420/* 421 * The Mbuf Cluster zone destructor. 422 */ 423static void 424mb_dtor_clust(void *mem, int size, void *arg) 425{ 426 427 KASSERT(*(uma_find_refcnt(zone_clust, mem)) <= 1, 428 ("%s: refcnt incorrect %u", __func__, 429 *(uma_find_refcnt(zone_clust, mem))) ); 430#ifdef INVARIANTS 431 trash_dtor(mem, size, arg); 432#endif 433} 434 435/* 436 * The Packet secondary zone's init routine, executed on the 437 * object's transition from mbuf keg slab to zone cache. 438 */ 439static int 440mb_zinit_pack(void *mem, int size, int how) 441{ 442 struct mbuf *m; 443 444 m = (struct mbuf *)mem; /* m is virgin. */ 445 (void)uma_zalloc_arg(zone_clust, m, how); 446 if (m->m_ext.ext_buf == NULL) 447 return (ENOMEM); 448 m->m_ext.ext_type = EXT_PACKET; /* Override. */ 449#ifdef INVARIANTS 450 trash_init(m->m_ext.ext_buf, MCLBYTES, how); 451#endif 452 return (0); 453} 454 455/* 456 * The Packet secondary zone's fini routine, executed on the 457 * object's transition from zone cache to keg slab. 458 */ 459static void 460mb_zfini_pack(void *mem, int size) 461{ 462 struct mbuf *m; 463 464 m = (struct mbuf *)mem; 465#ifdef INVARIANTS 466 trash_fini(m->m_ext.ext_buf, MCLBYTES); 467#endif 468 uma_zfree_arg(zone_clust, m->m_ext.ext_buf, NULL); 469#ifdef INVARIANTS 470 trash_dtor(mem, size, NULL); 471#endif 472} 473 474/* 475 * The "packet" keg constructor. 476 */ 477static int 478mb_ctor_pack(void *mem, int size, void *arg, int how) 479{ 480 struct mbuf *m; 481 struct mb_args *args; 482#ifdef MAC 483 int error; 484#endif 485 int flags; 486 short type; 487 488 m = (struct mbuf *)mem; 489 args = (struct mb_args *)arg; 490 flags = args->flags; 491 type = args->type; 492 493#ifdef INVARIANTS 494 trash_ctor(m->m_ext.ext_buf, MCLBYTES, arg, how); 495#endif 496 m->m_next = NULL; 497 m->m_nextpkt = NULL; 498 m->m_data = m->m_ext.ext_buf; 499 m->m_len = 0; 500 m->m_flags = (flags | M_EXT); 501 m->m_type = type; 502 503 if (flags & M_PKTHDR) { 504 m->m_pkthdr.rcvif = NULL; 505 m->m_pkthdr.len = 0; 506 m->m_pkthdr.header = NULL; 507 m->m_pkthdr.csum_flags = 0; 508 m->m_pkthdr.csum_data = 0; 509 SLIST_INIT(&m->m_pkthdr.tags); 510#ifdef MAC 511 /* If the label init fails, fail the alloc */ 512 error = mac_init_mbuf(m, how); 513 if (error) 514 return (error); 515#endif 516 } 517 /* m_ext is already initialized. */ 518 519 return (0); 520} 521 522static void 523mt_vlan_free(struct m_tag *mtag) 524{ 525 uma_zfree(zone_mtag_vlan, mtag); 526} 527 528static int 529mt_zinit_vlan(void *mem, int size, int how) 530{ 531 struct m_tag *mtag = (struct m_tag *)mem; 532 533 m_tag_setup(mtag, MTAG_VLAN, MTAG_VLAN_TAG, sizeof(u_int)); 534 mtag->m_tag_free = mt_vlan_free; 535 536 return (0); 537} 538 539/* 540 * This is the protocol drain routine. 541 * 542 * No locks should be held when this is called. The drain routines have to 543 * presently acquire some locks which raises the possibility of lock order 544 * reversal. 545 */ 546static void 547mb_reclaim(void *junk) 548{ 549 struct domain *dp; 550 struct protosw *pr; 551 552 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK | WARN_PANIC, NULL, 553 "mb_reclaim()"); 554 555 for (dp = domains; dp != NULL; dp = dp->dom_next) 556 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) 557 if (pr->pr_drain != NULL) 558 (*pr->pr_drain)(); 559}
| 392 break; 393#endif 394 case MJUM9BYTES: 395 type = EXT_JUMBO9; 396 break; 397 case MJUM16BYTES: 398 type = EXT_JUMBO16; 399 break; 400 default: 401 panic("unknown cluster size"); 402 break; 403 } 404 m->m_ext.ext_buf = (caddr_t)mem; 405 m->m_data = m->m_ext.ext_buf; 406 m->m_flags |= M_EXT; 407 m->m_ext.ext_free = NULL; 408 m->m_ext.ext_args = NULL; 409 m->m_ext.ext_size = size; 410 m->m_ext.ext_type = type; 411 m->m_ext.ref_cnt = uma_find_refcnt(zone_clust, mem); 412 *m->m_ext.ref_cnt = 1; 413 } else { 414 refcnt = uma_find_refcnt(zone_clust, mem); 415 *refcnt = 1; 416 } 417 return (0); 418} 419 420/* 421 * The Mbuf Cluster zone destructor. 422 */ 423static void 424mb_dtor_clust(void *mem, int size, void *arg) 425{ 426 427 KASSERT(*(uma_find_refcnt(zone_clust, mem)) <= 1, 428 ("%s: refcnt incorrect %u", __func__, 429 *(uma_find_refcnt(zone_clust, mem))) ); 430#ifdef INVARIANTS 431 trash_dtor(mem, size, arg); 432#endif 433} 434 435/* 436 * The Packet secondary zone's init routine, executed on the 437 * object's transition from mbuf keg slab to zone cache. 438 */ 439static int 440mb_zinit_pack(void *mem, int size, int how) 441{ 442 struct mbuf *m; 443 444 m = (struct mbuf *)mem; /* m is virgin. */ 445 (void)uma_zalloc_arg(zone_clust, m, how); 446 if (m->m_ext.ext_buf == NULL) 447 return (ENOMEM); 448 m->m_ext.ext_type = EXT_PACKET; /* Override. */ 449#ifdef INVARIANTS 450 trash_init(m->m_ext.ext_buf, MCLBYTES, how); 451#endif 452 return (0); 453} 454 455/* 456 * The Packet secondary zone's fini routine, executed on the 457 * object's transition from zone cache to keg slab. 458 */ 459static void 460mb_zfini_pack(void *mem, int size) 461{ 462 struct mbuf *m; 463 464 m = (struct mbuf *)mem; 465#ifdef INVARIANTS 466 trash_fini(m->m_ext.ext_buf, MCLBYTES); 467#endif 468 uma_zfree_arg(zone_clust, m->m_ext.ext_buf, NULL); 469#ifdef INVARIANTS 470 trash_dtor(mem, size, NULL); 471#endif 472} 473 474/* 475 * The "packet" keg constructor. 476 */ 477static int 478mb_ctor_pack(void *mem, int size, void *arg, int how) 479{ 480 struct mbuf *m; 481 struct mb_args *args; 482#ifdef MAC 483 int error; 484#endif 485 int flags; 486 short type; 487 488 m = (struct mbuf *)mem; 489 args = (struct mb_args *)arg; 490 flags = args->flags; 491 type = args->type; 492 493#ifdef INVARIANTS 494 trash_ctor(m->m_ext.ext_buf, MCLBYTES, arg, how); 495#endif 496 m->m_next = NULL; 497 m->m_nextpkt = NULL; 498 m->m_data = m->m_ext.ext_buf; 499 m->m_len = 0; 500 m->m_flags = (flags | M_EXT); 501 m->m_type = type; 502 503 if (flags & M_PKTHDR) { 504 m->m_pkthdr.rcvif = NULL; 505 m->m_pkthdr.len = 0; 506 m->m_pkthdr.header = NULL; 507 m->m_pkthdr.csum_flags = 0; 508 m->m_pkthdr.csum_data = 0; 509 SLIST_INIT(&m->m_pkthdr.tags); 510#ifdef MAC 511 /* If the label init fails, fail the alloc */ 512 error = mac_init_mbuf(m, how); 513 if (error) 514 return (error); 515#endif 516 } 517 /* m_ext is already initialized. */ 518 519 return (0); 520} 521 522static void 523mt_vlan_free(struct m_tag *mtag) 524{ 525 uma_zfree(zone_mtag_vlan, mtag); 526} 527 528static int 529mt_zinit_vlan(void *mem, int size, int how) 530{ 531 struct m_tag *mtag = (struct m_tag *)mem; 532 533 m_tag_setup(mtag, MTAG_VLAN, MTAG_VLAN_TAG, sizeof(u_int)); 534 mtag->m_tag_free = mt_vlan_free; 535 536 return (0); 537} 538 539/* 540 * This is the protocol drain routine. 541 * 542 * No locks should be held when this is called. The drain routines have to 543 * presently acquire some locks which raises the possibility of lock order 544 * reversal. 545 */ 546static void 547mb_reclaim(void *junk) 548{ 549 struct domain *dp; 550 struct protosw *pr; 551 552 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK | WARN_PANIC, NULL, 553 "mb_reclaim()"); 554 555 for (dp = domains; dp != NULL; dp = dp->dom_next) 556 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) 557 if (pr->pr_drain != NULL) 558 (*pr->pr_drain)(); 559}
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