1129906Sbmilekic/*- 2141991Sbmilekic * Copyright (c) 2004, 2005, 3254515Sandre * Bosko Milekic <bmilekic@FreeBSD.org>. All rights reserved. 4129906Sbmilekic * 5129906Sbmilekic * Redistribution and use in source and binary forms, with or without 6129906Sbmilekic * modification, are permitted provided that the following conditions 7129906Sbmilekic * are met: 8129906Sbmilekic * 1. Redistributions of source code must retain the above copyright 9129906Sbmilekic * notice unmodified, this list of conditions and the following 10129906Sbmilekic * disclaimer. 11129906Sbmilekic * 2. Redistributions in binary form must reproduce the above copyright 12129906Sbmilekic * notice, this list of conditions and the following disclaimer in the 13129906Sbmilekic * documentation and/or other materials provided with the distribution. 14129906Sbmilekic * 15129906Sbmilekic * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16129906Sbmilekic * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17129906Sbmilekic * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18129906Sbmilekic * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19129906Sbmilekic * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20129906Sbmilekic * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21129906Sbmilekic * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22129906Sbmilekic * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23129906Sbmilekic * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24129906Sbmilekic * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25129906Sbmilekic * SUCH DAMAGE. 26129906Sbmilekic */ 27129906Sbmilekic 28129906Sbmilekic#include <sys/cdefs.h> 29129906Sbmilekic__FBSDID("$FreeBSD$"); 30129906Sbmilekic 31129906Sbmilekic#include "opt_param.h" 32129906Sbmilekic 33129906Sbmilekic#include <sys/param.h> 34129906Sbmilekic#include <sys/malloc.h> 35129906Sbmilekic#include <sys/systm.h> 36129906Sbmilekic#include <sys/mbuf.h> 37129906Sbmilekic#include <sys/domain.h> 38129906Sbmilekic#include <sys/eventhandler.h> 39129906Sbmilekic#include <sys/kernel.h> 40129906Sbmilekic#include <sys/protosw.h> 41129906Sbmilekic#include <sys/smp.h> 42129906Sbmilekic#include <sys/sysctl.h> 43129906Sbmilekic 44163606Srwatson#include <security/mac/mac_framework.h> 45163606Srwatson 46129906Sbmilekic#include <vm/vm.h> 47194454Salc#include <vm/vm_extern.h> 48194454Salc#include <vm/vm_kern.h> 49129906Sbmilekic#include <vm/vm_page.h> 50254515Sandre#include <vm/vm_map.h> 51129906Sbmilekic#include <vm/uma.h> 52147537Ssilby#include <vm/uma_int.h> 53147537Ssilby#include <vm/uma_dbg.h> 54129906Sbmilekic 55129906Sbmilekic/* 56129906Sbmilekic * In FreeBSD, Mbufs and Mbuf Clusters are allocated from UMA 57129906Sbmilekic * Zones. 58129906Sbmilekic * 59129906Sbmilekic * Mbuf Clusters (2K, contiguous) are allocated from the Cluster 60129906Sbmilekic * Zone. The Zone can be capped at kern.ipc.nmbclusters, if the 61129906Sbmilekic * administrator so desires. 62129906Sbmilekic * 63129906Sbmilekic * Mbufs are allocated from a UMA Master Zone called the Mbuf 64129906Sbmilekic * Zone. 65129906Sbmilekic * 66129906Sbmilekic * Additionally, FreeBSD provides a Packet Zone, which it 67129906Sbmilekic * configures as a Secondary Zone to the Mbuf Master Zone, 68129906Sbmilekic * thus sharing backend Slab kegs with the Mbuf Master Zone. 69129906Sbmilekic * 70129906Sbmilekic * Thus common-case allocations and locking are simplified: 71129906Sbmilekic * 72129906Sbmilekic * m_clget() m_getcl() 73129906Sbmilekic * | | 74129906Sbmilekic * | .------------>[(Packet Cache)] m_get(), m_gethdr() 75129906Sbmilekic * | | [ Packet ] | 76129906Sbmilekic * [(Cluster Cache)] [ Secondary ] [ (Mbuf Cache) ] 77129906Sbmilekic * [ Cluster Zone ] [ Zone ] [ Mbuf Master Zone ] 78129906Sbmilekic * | \________ | 79129906Sbmilekic * [ Cluster Keg ] \ / 80254515Sandre * | [ Mbuf Keg ] 81129906Sbmilekic * [ Cluster Slabs ] | 82129906Sbmilekic * | [ Mbuf Slabs ] 83129906Sbmilekic * \____________(VM)_________________/ 84151976Sandre * 85151976Sandre * 86156023Sglebius * Whenever an object is allocated with uma_zalloc() out of 87151976Sandre * one of the Zones its _ctor_ function is executed. The same 88156023Sglebius * for any deallocation through uma_zfree() the _dtor_ function 89151976Sandre * is executed. 90156023Sglebius * 91151976Sandre * Caches are per-CPU and are filled from the Master Zone. 92151976Sandre * 93156023Sglebius * Whenever an object is allocated from the underlying global 94151976Sandre * memory pool it gets pre-initialized with the _zinit_ functions. 95151976Sandre * When the Keg's are overfull objects get decomissioned with 96151976Sandre * _zfini_ functions and free'd back to the global memory pool. 97151976Sandre * 98129906Sbmilekic */ 99129906Sbmilekic 100254515Sandreint nmbufs; /* limits number of mbufs */ 101151976Sandreint nmbclusters; /* limits number of mbuf clusters */ 102155780Sandreint nmbjumbop; /* limits number of page size jumbo clusters */ 103151976Sandreint nmbjumbo9; /* limits number of 9k jumbo clusters */ 104151976Sandreint nmbjumbo16; /* limits number of 16k jumbo clusters */ 105129906Sbmilekicstruct mbstat mbstat; 106129906Sbmilekic 107254515Sandrestatic quad_t maxmbufmem; /* overall real memory limit for all mbufs */ 108254515Sandre 109254515SandreSYSCTL_QUAD(_kern_ipc, OID_AUTO, maxmbufmem, CTLFLAG_RDTUN, &maxmbufmem, 0, 110254515Sandre "Maximum real memory allocateable to various mbuf types"); 111254515Sandre 112185893Sbz/* 113254515Sandre * tunable_mbinit() has to be run before any mbuf allocations are done. 114185893Sbz */ 115129906Sbmilekicstatic void 116129906Sbmilekictunable_mbinit(void *dummy) 117129906Sbmilekic{ 118254515Sandre quad_t realmem; 119129906Sbmilekic 120254515Sandre /* 121254515Sandre * The default limit for all mbuf related memory is 1/2 of all 122254515Sandre * available kernel memory (physical or kmem). 123254515Sandre * At most it can be 3/4 of available kernel memory. 124254515Sandre */ 125254515Sandre realmem = qmin((quad_t)physmem * PAGE_SIZE, 126254515Sandre vm_map_max(kmem_map) - vm_map_min(kmem_map)); 127254515Sandre maxmbufmem = realmem / 2; 128254515Sandre TUNABLE_QUAD_FETCH("kern.ipc.maxmbufmem", &maxmbufmem); 129254515Sandre if (maxmbufmem > realmem / 4 * 3) 130254515Sandre maxmbufmem = realmem / 4 * 3; 131254515Sandre 132241468Snp TUNABLE_INT_FETCH("kern.ipc.nmbclusters", &nmbclusters); 133184778Skmacy if (nmbclusters == 0) 134254515Sandre nmbclusters = maxmbufmem / MCLBYTES / 4; 135241468Snp 136241468Snp TUNABLE_INT_FETCH("kern.ipc.nmbjumbop", &nmbjumbop); 137241468Snp if (nmbjumbop == 0) 138254515Sandre nmbjumbop = maxmbufmem / MJUMPAGESIZE / 4; 139241468Snp 140241468Snp TUNABLE_INT_FETCH("kern.ipc.nmbjumbo9", &nmbjumbo9); 141241468Snp if (nmbjumbo9 == 0) 142254515Sandre nmbjumbo9 = maxmbufmem / MJUM9BYTES / 6; 143241468Snp 144241468Snp TUNABLE_INT_FETCH("kern.ipc.nmbjumbo16", &nmbjumbo16); 145241468Snp if (nmbjumbo16 == 0) 146254515Sandre nmbjumbo16 = maxmbufmem / MJUM16BYTES / 6; 147254515Sandre 148254515Sandre /* 149254515Sandre * We need at least as many mbufs as we have clusters of 150254515Sandre * the various types added together. 151254515Sandre */ 152254515Sandre TUNABLE_INT_FETCH("kern.ipc.nmbufs", &nmbufs); 153254515Sandre if (nmbufs < nmbclusters + nmbjumbop + nmbjumbo9 + nmbjumbo16) 154254515Sandre nmbufs = lmax(maxmbufmem / MSIZE / 5, 155254515Sandre nmbclusters + nmbjumbop + nmbjumbo9 + nmbjumbo16); 156129906Sbmilekic} 157254515SandreSYSINIT(tunable_mbinit, SI_SUB_KMEM, SI_ORDER_MIDDLE, tunable_mbinit, NULL); 158129906Sbmilekic 159157927Spsstatic int 160157927Spssysctl_nmbclusters(SYSCTL_HANDLER_ARGS) 161157927Sps{ 162157927Sps int error, newnmbclusters; 163157927Sps 164157927Sps newnmbclusters = nmbclusters; 165254515Sandre error = sysctl_handle_int(oidp, &newnmbclusters, 0, req); 166258183Sjhb if (error == 0 && req->newptr && newnmbclusters != nmbclusters) { 167254515Sandre if (newnmbclusters > nmbclusters && 168254515Sandre nmbufs >= nmbclusters + nmbjumbop + nmbjumbo9 + nmbjumbo16) { 169157927Sps nmbclusters = newnmbclusters; 170254515Sandre nmbclusters = uma_zone_set_max(zone_clust, nmbclusters); 171157927Sps EVENTHANDLER_INVOKE(nmbclusters_change); 172157927Sps } else 173157927Sps error = EINVAL; 174157927Sps } 175157927Sps return (error); 176157927Sps} 177157927SpsSYSCTL_PROC(_kern_ipc, OID_AUTO, nmbclusters, CTLTYPE_INT|CTLFLAG_RW, 178157927Sps&nmbclusters, 0, sysctl_nmbclusters, "IU", 179129906Sbmilekic "Maximum number of mbuf clusters allowed"); 180174292Srrs 181174292Srrsstatic int 182174292Srrssysctl_nmbjumbop(SYSCTL_HANDLER_ARGS) 183174292Srrs{ 184174292Srrs int error, newnmbjumbop; 185174292Srrs 186174292Srrs newnmbjumbop = nmbjumbop; 187254515Sandre error = sysctl_handle_int(oidp, &newnmbjumbop, 0, req); 188258183Sjhb if (error == 0 && req->newptr && newnmbjumbop != nmbjumbop) { 189254515Sandre if (newnmbjumbop > nmbjumbop && 190254515Sandre nmbufs >= nmbclusters + nmbjumbop + nmbjumbo9 + nmbjumbo16) { 191174292Srrs nmbjumbop = newnmbjumbop; 192254515Sandre nmbjumbop = uma_zone_set_max(zone_jumbop, nmbjumbop); 193174292Srrs } else 194174292Srrs error = EINVAL; 195174292Srrs } 196174292Srrs return (error); 197174292Srrs} 198174292SrrsSYSCTL_PROC(_kern_ipc, OID_AUTO, nmbjumbop, CTLTYPE_INT|CTLFLAG_RW, 199174292Srrs&nmbjumbop, 0, sysctl_nmbjumbop, "IU", 200254515Sandre "Maximum number of mbuf page size jumbo clusters allowed"); 201174292Srrs 202174292Srrsstatic int 203174292Srrssysctl_nmbjumbo9(SYSCTL_HANDLER_ARGS) 204174292Srrs{ 205174292Srrs int error, newnmbjumbo9; 206174292Srrs 207174292Srrs newnmbjumbo9 = nmbjumbo9; 208254515Sandre error = sysctl_handle_int(oidp, &newnmbjumbo9, 0, req); 209258183Sjhb if (error == 0 && req->newptr && newnmbjumbo9 != nmbjumbo9) { 210254515Sandre if (newnmbjumbo9 > nmbjumbo9 && 211254515Sandre nmbufs >= nmbclusters + nmbjumbop + nmbjumbo9 + nmbjumbo16) { 212174292Srrs nmbjumbo9 = newnmbjumbo9; 213254515Sandre nmbjumbo9 = uma_zone_set_max(zone_jumbo9, nmbjumbo9); 214174292Srrs } else 215174292Srrs error = EINVAL; 216174292Srrs } 217174292Srrs return (error); 218174292Srrs} 219174292SrrsSYSCTL_PROC(_kern_ipc, OID_AUTO, nmbjumbo9, CTLTYPE_INT|CTLFLAG_RW, 220174292Srrs&nmbjumbo9, 0, sysctl_nmbjumbo9, "IU", 221254515Sandre "Maximum number of mbuf 9k jumbo clusters allowed"); 222174292Srrs 223174292Srrsstatic int 224174292Srrssysctl_nmbjumbo16(SYSCTL_HANDLER_ARGS) 225174292Srrs{ 226174292Srrs int error, newnmbjumbo16; 227174292Srrs 228174292Srrs newnmbjumbo16 = nmbjumbo16; 229254515Sandre error = sysctl_handle_int(oidp, &newnmbjumbo16, 0, req); 230258183Sjhb if (error == 0 && req->newptr && newnmbjumbo16 != nmbjumbo16) { 231254515Sandre if (newnmbjumbo16 > nmbjumbo16 && 232254515Sandre nmbufs >= nmbclusters + nmbjumbop + nmbjumbo9 + nmbjumbo16) { 233174292Srrs nmbjumbo16 = newnmbjumbo16; 234254515Sandre nmbjumbo16 = uma_zone_set_max(zone_jumbo16, nmbjumbo16); 235174292Srrs } else 236174292Srrs error = EINVAL; 237174292Srrs } 238174292Srrs return (error); 239174292Srrs} 240174292SrrsSYSCTL_PROC(_kern_ipc, OID_AUTO, nmbjumbo16, CTLTYPE_INT|CTLFLAG_RW, 241174292Srrs&nmbjumbo16, 0, sysctl_nmbjumbo16, "IU", 242151976Sandre "Maximum number of mbuf 16k jumbo clusters allowed"); 243174292Srrs 244254515Sandrestatic int 245254515Sandresysctl_nmbufs(SYSCTL_HANDLER_ARGS) 246254515Sandre{ 247254515Sandre int error, newnmbufs; 248174292Srrs 249254515Sandre newnmbufs = nmbufs; 250254515Sandre error = sysctl_handle_int(oidp, &newnmbufs, 0, req); 251258183Sjhb if (error == 0 && req->newptr && newnmbufs != nmbufs) { 252254515Sandre if (newnmbufs > nmbufs) { 253254515Sandre nmbufs = newnmbufs; 254254515Sandre nmbufs = uma_zone_set_max(zone_mbuf, nmbufs); 255254515Sandre EVENTHANDLER_INVOKE(nmbufs_change); 256254515Sandre } else 257254515Sandre error = EINVAL; 258254515Sandre } 259254515Sandre return (error); 260254515Sandre} 261254515SandreSYSCTL_PROC(_kern_ipc, OID_AUTO, nmbufs, CTLTYPE_INT|CTLFLAG_RW, 262254515Sandre&nmbufs, 0, sysctl_nmbufs, "IU", 263254515Sandre "Maximum number of mbufs allowed"); 264174292Srrs 265129906SbmilekicSYSCTL_STRUCT(_kern_ipc, OID_AUTO, mbstat, CTLFLAG_RD, &mbstat, mbstat, 266129906Sbmilekic "Mbuf general information and statistics"); 267129906Sbmilekic 268129906Sbmilekic/* 269129906Sbmilekic * Zones from which we allocate. 270129906Sbmilekic */ 271129906Sbmilekicuma_zone_t zone_mbuf; 272129906Sbmilekicuma_zone_t zone_clust; 273129906Sbmilekicuma_zone_t zone_pack; 274155780Sandreuma_zone_t zone_jumbop; 275151976Sandreuma_zone_t zone_jumbo9; 276151976Sandreuma_zone_t zone_jumbo16; 277151976Sandreuma_zone_t zone_ext_refcnt; 278129906Sbmilekic 279129906Sbmilekic/* 280129906Sbmilekic * Local prototypes. 281129906Sbmilekic */ 282132987Sgreenstatic int mb_ctor_mbuf(void *, int, void *, int); 283132987Sgreenstatic int mb_ctor_clust(void *, int, void *, int); 284132987Sgreenstatic int mb_ctor_pack(void *, int, void *, int); 285129906Sbmilekicstatic void mb_dtor_mbuf(void *, int, void *); 286151976Sandrestatic void mb_dtor_clust(void *, int, void *); 287151976Sandrestatic void mb_dtor_pack(void *, int, void *); 288151976Sandrestatic int mb_zinit_pack(void *, int, int); 289151976Sandrestatic void mb_zfini_pack(void *, int); 290129906Sbmilekic 291129906Sbmilekicstatic void mb_reclaim(void *); 292209390Sedstatic void *mbuf_jumbo_alloc(uma_zone_t, int, uint8_t *, int); 293129906Sbmilekic 294135510Sbrian/* Ensure that MSIZE doesn't break dtom() - it must be a power of 2 */ 295135510SbrianCTASSERT((((MSIZE - 1) ^ MSIZE) + 1) >> 1 == MSIZE); 296135510Sbrian 297129906Sbmilekic/* 298129906Sbmilekic * Initialize FreeBSD Network buffer allocation. 299129906Sbmilekic */ 300129906Sbmilekicstatic void 301129906Sbmilekicmbuf_init(void *dummy) 302129906Sbmilekic{ 303129906Sbmilekic 304129906Sbmilekic /* 305129906Sbmilekic * Configure UMA zones for Mbufs, Clusters, and Packets. 306129906Sbmilekic */ 307151976Sandre zone_mbuf = uma_zcreate(MBUF_MEM_NAME, MSIZE, 308151976Sandre mb_ctor_mbuf, mb_dtor_mbuf, 309147537Ssilby#ifdef INVARIANTS 310151976Sandre trash_init, trash_fini, 311147537Ssilby#else 312151976Sandre NULL, NULL, 313147537Ssilby#endif 314151976Sandre MSIZE - 1, UMA_ZONE_MAXBUCKET); 315254515Sandre if (nmbufs > 0) 316254515Sandre nmbufs = uma_zone_set_max(zone_mbuf, nmbufs); 317151976Sandre 318148095Srwatson zone_clust = uma_zcreate(MBUF_CLUSTER_MEM_NAME, MCLBYTES, 319151976Sandre mb_ctor_clust, mb_dtor_clust, 320147537Ssilby#ifdef INVARIANTS 321151976Sandre trash_init, trash_fini, 322147537Ssilby#else 323151976Sandre NULL, NULL, 324147537Ssilby#endif 325151976Sandre UMA_ALIGN_PTR, UMA_ZONE_REFCNT); 326129906Sbmilekic if (nmbclusters > 0) 327254515Sandre nmbclusters = uma_zone_set_max(zone_clust, nmbclusters); 328151976Sandre 329148095Srwatson zone_pack = uma_zsecond_create(MBUF_PACKET_MEM_NAME, mb_ctor_pack, 330151976Sandre mb_dtor_pack, mb_zinit_pack, mb_zfini_pack, zone_mbuf); 331129906Sbmilekic 332156023Sglebius /* Make jumbo frame zone too. Page size, 9k and 16k. */ 333155780Sandre zone_jumbop = uma_zcreate(MBUF_JUMBOP_MEM_NAME, MJUMPAGESIZE, 334153232Sandre mb_ctor_clust, mb_dtor_clust, 335153232Sandre#ifdef INVARIANTS 336153232Sandre trash_init, trash_fini, 337153232Sandre#else 338153232Sandre NULL, NULL, 339153232Sandre#endif 340153232Sandre UMA_ALIGN_PTR, UMA_ZONE_REFCNT); 341155780Sandre if (nmbjumbop > 0) 342254515Sandre nmbjumbop = uma_zone_set_max(zone_jumbop, nmbjumbop); 343153232Sandre 344151976Sandre zone_jumbo9 = uma_zcreate(MBUF_JUMBO9_MEM_NAME, MJUM9BYTES, 345151976Sandre mb_ctor_clust, mb_dtor_clust, 346151976Sandre#ifdef INVARIANTS 347151976Sandre trash_init, trash_fini, 348151976Sandre#else 349151976Sandre NULL, NULL, 350151976Sandre#endif 351151976Sandre UMA_ALIGN_PTR, UMA_ZONE_REFCNT); 352254515Sandre uma_zone_set_allocf(zone_jumbo9, mbuf_jumbo_alloc); 353151976Sandre if (nmbjumbo9 > 0) 354254515Sandre nmbjumbo9 = uma_zone_set_max(zone_jumbo9, nmbjumbo9); 355129906Sbmilekic 356151976Sandre zone_jumbo16 = uma_zcreate(MBUF_JUMBO16_MEM_NAME, MJUM16BYTES, 357151976Sandre mb_ctor_clust, mb_dtor_clust, 358151976Sandre#ifdef INVARIANTS 359151976Sandre trash_init, trash_fini, 360151976Sandre#else 361151976Sandre NULL, NULL, 362151976Sandre#endif 363151976Sandre UMA_ALIGN_PTR, UMA_ZONE_REFCNT); 364254515Sandre uma_zone_set_allocf(zone_jumbo16, mbuf_jumbo_alloc); 365151976Sandre if (nmbjumbo16 > 0) 366254515Sandre nmbjumbo16 = uma_zone_set_max(zone_jumbo16, nmbjumbo16); 367151976Sandre 368151976Sandre zone_ext_refcnt = uma_zcreate(MBUF_EXTREFCNT_MEM_NAME, sizeof(u_int), 369151976Sandre NULL, NULL, 370151976Sandre NULL, NULL, 371151976Sandre UMA_ALIGN_PTR, UMA_ZONE_ZINIT); 372151976Sandre 373151976Sandre /* uma_prealloc() goes here... */ 374151976Sandre 375129906Sbmilekic /* 376129906Sbmilekic * Hook event handler for low-memory situation, used to 377129906Sbmilekic * drain protocols and push data back to the caches (UMA 378129906Sbmilekic * later pushes it back to VM). 379129906Sbmilekic */ 380129906Sbmilekic EVENTHANDLER_REGISTER(vm_lowmem, mb_reclaim, NULL, 381129906Sbmilekic EVENTHANDLER_PRI_FIRST); 382129906Sbmilekic 383129906Sbmilekic /* 384129906Sbmilekic * [Re]set counters and local statistics knobs. 385129906Sbmilekic * XXX Some of these should go and be replaced, but UMA stat 386129906Sbmilekic * gathering needs to be revised. 387129906Sbmilekic */ 388129906Sbmilekic mbstat.m_mbufs = 0; 389129906Sbmilekic mbstat.m_mclusts = 0; 390129906Sbmilekic mbstat.m_drain = 0; 391129906Sbmilekic mbstat.m_msize = MSIZE; 392129906Sbmilekic mbstat.m_mclbytes = MCLBYTES; 393129906Sbmilekic mbstat.m_minclsize = MINCLSIZE; 394129906Sbmilekic mbstat.m_mlen = MLEN; 395129906Sbmilekic mbstat.m_mhlen = MHLEN; 396129906Sbmilekic mbstat.m_numtypes = MT_NTYPES; 397129906Sbmilekic 398129906Sbmilekic mbstat.m_mcfail = mbstat.m_mpfail = 0; 399129906Sbmilekic mbstat.sf_iocnt = 0; 400129906Sbmilekic mbstat.sf_allocwait = mbstat.sf_allocfail = 0; 401129906Sbmilekic} 402254515SandreSYSINIT(mbuf, SI_SUB_MBUF, SI_ORDER_FIRST, mbuf_init, NULL); 403129906Sbmilekic 404129906Sbmilekic/* 405174247Salc * UMA backend page allocator for the jumbo frame zones. 406174247Salc * 407174247Salc * Allocates kernel virtual memory that is backed by contiguous physical 408174247Salc * pages. 409174247Salc */ 410174247Salcstatic void * 411209390Sedmbuf_jumbo_alloc(uma_zone_t zone, int bytes, uint8_t *flags, int wait) 412174247Salc{ 413174247Salc 414177921Salc /* Inform UMA that this allocator uses kernel_map/object. */ 415177921Salc *flags = UMA_SLAB_KERNEL; 416194454Salc return ((void *)kmem_alloc_contig(kernel_map, bytes, wait, 417195649Salc (vm_paddr_t)0, ~(vm_paddr_t)0, 1, 0, VM_MEMATTR_DEFAULT)); 418174247Salc} 419174247Salc 420174247Salc/* 421129906Sbmilekic * Constructor for Mbuf master zone. 422129906Sbmilekic * 423129906Sbmilekic * The 'arg' pointer points to a mb_args structure which 424129906Sbmilekic * contains call-specific information required to support the 425151976Sandre * mbuf allocation API. See mbuf.h. 426129906Sbmilekic */ 427132987Sgreenstatic int 428132987Sgreenmb_ctor_mbuf(void *mem, int size, void *arg, int how) 429129906Sbmilekic{ 430129906Sbmilekic struct mbuf *m; 431129906Sbmilekic struct mb_args *args; 432132987Sgreen#ifdef MAC 433132987Sgreen int error; 434132987Sgreen#endif 435129906Sbmilekic int flags; 436129906Sbmilekic short type; 437129906Sbmilekic 438147537Ssilby#ifdef INVARIANTS 439147537Ssilby trash_ctor(mem, size, arg, how); 440147537Ssilby#endif 441129906Sbmilekic m = (struct mbuf *)mem; 442129906Sbmilekic args = (struct mb_args *)arg; 443129906Sbmilekic flags = args->flags; 444129906Sbmilekic type = args->type; 445129906Sbmilekic 446151976Sandre /* 447151976Sandre * The mbuf is initialized later. The caller has the 448156059Sglebius * responsibility to set up any MAC labels too. 449151976Sandre */ 450151976Sandre if (type == MT_NOINIT) 451151976Sandre return (0); 452151976Sandre 453129906Sbmilekic m->m_next = NULL; 454129906Sbmilekic m->m_nextpkt = NULL; 455151976Sandre m->m_len = 0; 456129947Sbmilekic m->m_flags = flags; 457151976Sandre m->m_type = type; 458129906Sbmilekic if (flags & M_PKTHDR) { 459129906Sbmilekic m->m_data = m->m_pktdat; 460129906Sbmilekic m->m_pkthdr.rcvif = NULL; 461184778Skmacy m->m_pkthdr.header = NULL; 462151976Sandre m->m_pkthdr.len = 0; 463129906Sbmilekic m->m_pkthdr.csum_flags = 0; 464151976Sandre m->m_pkthdr.csum_data = 0; 465162377Sandre m->m_pkthdr.tso_segsz = 0; 466162377Sandre m->m_pkthdr.ether_vtag = 0; 467186683Srwatson m->m_pkthdr.flowid = 0; 468129906Sbmilekic SLIST_INIT(&m->m_pkthdr.tags); 469129906Sbmilekic#ifdef MAC 470129906Sbmilekic /* If the label init fails, fail the alloc */ 471172930Srwatson error = mac_mbuf_init(m, how); 472132987Sgreen if (error) 473132987Sgreen return (error); 474129906Sbmilekic#endif 475129947Sbmilekic } else 476129906Sbmilekic m->m_data = m->m_dat; 477132987Sgreen return (0); 478129906Sbmilekic} 479129906Sbmilekic 480129906Sbmilekic/* 481151976Sandre * The Mbuf master zone destructor. 482129906Sbmilekic */ 483129906Sbmilekicstatic void 484129906Sbmilekicmb_dtor_mbuf(void *mem, int size, void *arg) 485129906Sbmilekic{ 486129906Sbmilekic struct mbuf *m; 487254515Sandre unsigned long flags; 488129906Sbmilekic 489129906Sbmilekic m = (struct mbuf *)mem; 490172462Skmacy flags = (unsigned long)arg; 491173029Sobrien 492172462Skmacy if ((flags & MB_NOTAGS) == 0 && (m->m_flags & M_PKTHDR) != 0) 493129906Sbmilekic m_tag_delete_chain(m, NULL); 494151976Sandre KASSERT((m->m_flags & M_EXT) == 0, ("%s: M_EXT set", __func__)); 495173029Sobrien KASSERT((m->m_flags & M_NOFREE) == 0, ("%s: M_NOFREE set", __func__)); 496147537Ssilby#ifdef INVARIANTS 497147537Ssilby trash_dtor(mem, size, arg); 498147537Ssilby#endif 499129906Sbmilekic} 500129906Sbmilekic 501151976Sandre/* 502151976Sandre * The Mbuf Packet zone destructor. 503151976Sandre */ 504129906Sbmilekicstatic void 505129906Sbmilekicmb_dtor_pack(void *mem, int size, void *arg) 506129906Sbmilekic{ 507129906Sbmilekic struct mbuf *m; 508129906Sbmilekic 509129906Sbmilekic m = (struct mbuf *)mem; 510129906Sbmilekic if ((m->m_flags & M_PKTHDR) != 0) 511129906Sbmilekic m_tag_delete_chain(m, NULL); 512151976Sandre 513151976Sandre /* Make sure we've got a clean cluster back. */ 514151976Sandre KASSERT((m->m_flags & M_EXT) == M_EXT, ("%s: M_EXT not set", __func__)); 515151976Sandre KASSERT(m->m_ext.ext_buf != NULL, ("%s: ext_buf == NULL", __func__)); 516151976Sandre KASSERT(m->m_ext.ext_free == NULL, ("%s: ext_free != NULL", __func__)); 517175872Sphk KASSERT(m->m_ext.ext_arg1 == NULL, ("%s: ext_arg1 != NULL", __func__)); 518175872Sphk KASSERT(m->m_ext.ext_arg2 == NULL, ("%s: ext_arg2 != NULL", __func__)); 519151976Sandre KASSERT(m->m_ext.ext_size == MCLBYTES, ("%s: ext_size != MCLBYTES", __func__)); 520152130Sglebius KASSERT(m->m_ext.ext_type == EXT_PACKET, ("%s: ext_type != EXT_PACKET", __func__)); 521151976Sandre KASSERT(*m->m_ext.ref_cnt == 1, ("%s: ref_cnt != 1", __func__)); 522147537Ssilby#ifdef INVARIANTS 523147537Ssilby trash_dtor(m->m_ext.ext_buf, MCLBYTES, arg); 524147537Ssilby#endif 525166213Smohans /* 526173029Sobrien * If there are processes blocked on zone_clust, waiting for pages 527173029Sobrien * to be freed up, * cause them to be woken up by draining the 528173029Sobrien * packet zone. We are exposed to a race here * (in the check for 529173029Sobrien * the UMA_ZFLAG_FULL) where we might miss the flag set, but that 530173029Sobrien * is deliberate. We don't want to acquire the zone lock for every 531173029Sobrien * mbuf free. 532166213Smohans */ 533173029Sobrien if (uma_zone_exhausted_nolock(zone_clust)) 534173029Sobrien zone_drain(zone_pack); 535129906Sbmilekic} 536129906Sbmilekic 537129906Sbmilekic/* 538155780Sandre * The Cluster and Jumbo[PAGESIZE|9|16] zone constructor. 539129906Sbmilekic * 540129906Sbmilekic * Here the 'arg' pointer points to the Mbuf which we 541151976Sandre * are configuring cluster storage for. If 'arg' is 542151976Sandre * empty we allocate just the cluster without setting 543151976Sandre * the mbuf to it. See mbuf.h. 544129906Sbmilekic */ 545132987Sgreenstatic int 546132987Sgreenmb_ctor_clust(void *mem, int size, void *arg, int how) 547129906Sbmilekic{ 548129906Sbmilekic struct mbuf *m; 549151976Sandre u_int *refcnt; 550168374Skmacy int type; 551168374Skmacy uma_zone_t zone; 552173029Sobrien 553147537Ssilby#ifdef INVARIANTS 554147537Ssilby trash_ctor(mem, size, arg, how); 555147537Ssilby#endif 556168374Skmacy switch (size) { 557168374Skmacy case MCLBYTES: 558168374Skmacy type = EXT_CLUSTER; 559168374Skmacy zone = zone_clust; 560168374Skmacy break; 561168374Skmacy#if MJUMPAGESIZE != MCLBYTES 562168374Skmacy case MJUMPAGESIZE: 563168374Skmacy type = EXT_JUMBOP; 564168374Skmacy zone = zone_jumbop; 565168374Skmacy break; 566168374Skmacy#endif 567168374Skmacy case MJUM9BYTES: 568168374Skmacy type = EXT_JUMBO9; 569168374Skmacy zone = zone_jumbo9; 570168374Skmacy break; 571168374Skmacy case MJUM16BYTES: 572168374Skmacy type = EXT_JUMBO16; 573168374Skmacy zone = zone_jumbo16; 574168374Skmacy break; 575168374Skmacy default: 576168374Skmacy panic("unknown cluster size"); 577168374Skmacy break; 578168374Skmacy } 579168374Skmacy 580129906Sbmilekic m = (struct mbuf *)arg; 581168374Skmacy refcnt = uma_find_refcnt(zone, mem); 582173029Sobrien *refcnt = 1; 583151976Sandre if (m != NULL) { 584151976Sandre m->m_ext.ext_buf = (caddr_t)mem; 585151976Sandre m->m_data = m->m_ext.ext_buf; 586151976Sandre m->m_flags |= M_EXT; 587151976Sandre m->m_ext.ext_free = NULL; 588175872Sphk m->m_ext.ext_arg1 = NULL; 589175872Sphk m->m_ext.ext_arg2 = NULL; 590151976Sandre m->m_ext.ext_size = size; 591151976Sandre m->m_ext.ext_type = type; 592168374Skmacy m->m_ext.ref_cnt = refcnt; 593151976Sandre } 594168374Skmacy 595132987Sgreen return (0); 596129906Sbmilekic} 597129906Sbmilekic 598151976Sandre/* 599151976Sandre * The Mbuf Cluster zone destructor. 600151976Sandre */ 601129906Sbmilekicstatic void 602129906Sbmilekicmb_dtor_clust(void *mem, int size, void *arg) 603129906Sbmilekic{ 604168374Skmacy#ifdef INVARIANTS 605168374Skmacy uma_zone_t zone; 606151976Sandre 607168374Skmacy zone = m_getzone(size); 608168374Skmacy KASSERT(*(uma_find_refcnt(zone, mem)) <= 1, 609152035Sandre ("%s: refcnt incorrect %u", __func__, 610168374Skmacy *(uma_find_refcnt(zone, mem))) ); 611168374Skmacy 612147537Ssilby trash_dtor(mem, size, arg); 613147537Ssilby#endif 614129906Sbmilekic} 615129906Sbmilekic 616129906Sbmilekic/* 617129906Sbmilekic * The Packet secondary zone's init routine, executed on the 618151976Sandre * object's transition from mbuf keg slab to zone cache. 619129906Sbmilekic */ 620132987Sgreenstatic int 621151976Sandremb_zinit_pack(void *mem, int size, int how) 622129906Sbmilekic{ 623129906Sbmilekic struct mbuf *m; 624129906Sbmilekic 625151976Sandre m = (struct mbuf *)mem; /* m is virgin. */ 626156428Sandre if (uma_zalloc_arg(zone_clust, m, how) == NULL || 627156428Sandre m->m_ext.ext_buf == NULL) 628132987Sgreen return (ENOMEM); 629152101Sandre m->m_ext.ext_type = EXT_PACKET; /* Override. */ 630147537Ssilby#ifdef INVARIANTS 631147537Ssilby trash_init(m->m_ext.ext_buf, MCLBYTES, how); 632147537Ssilby#endif 633132987Sgreen return (0); 634129906Sbmilekic} 635129906Sbmilekic 636129906Sbmilekic/* 637129906Sbmilekic * The Packet secondary zone's fini routine, executed on the 638129906Sbmilekic * object's transition from zone cache to keg slab. 639129906Sbmilekic */ 640129906Sbmilekicstatic void 641151976Sandremb_zfini_pack(void *mem, int size) 642129906Sbmilekic{ 643129906Sbmilekic struct mbuf *m; 644129906Sbmilekic 645129906Sbmilekic m = (struct mbuf *)mem; 646147537Ssilby#ifdef INVARIANTS 647147537Ssilby trash_fini(m->m_ext.ext_buf, MCLBYTES); 648147537Ssilby#endif 649129906Sbmilekic uma_zfree_arg(zone_clust, m->m_ext.ext_buf, NULL); 650147652Ssilby#ifdef INVARIANTS 651147652Ssilby trash_dtor(mem, size, NULL); 652147652Ssilby#endif 653129906Sbmilekic} 654129906Sbmilekic 655129906Sbmilekic/* 656129906Sbmilekic * The "packet" keg constructor. 657129906Sbmilekic */ 658132987Sgreenstatic int 659132987Sgreenmb_ctor_pack(void *mem, int size, void *arg, int how) 660129906Sbmilekic{ 661129906Sbmilekic struct mbuf *m; 662129906Sbmilekic struct mb_args *args; 663132987Sgreen#ifdef MAC 664132987Sgreen int error; 665132987Sgreen#endif 666132987Sgreen int flags; 667129906Sbmilekic short type; 668129906Sbmilekic 669129906Sbmilekic m = (struct mbuf *)mem; 670129906Sbmilekic args = (struct mb_args *)arg; 671129906Sbmilekic flags = args->flags; 672129906Sbmilekic type = args->type; 673129906Sbmilekic 674147537Ssilby#ifdef INVARIANTS 675147537Ssilby trash_ctor(m->m_ext.ext_buf, MCLBYTES, arg, how); 676147537Ssilby#endif 677129906Sbmilekic m->m_next = NULL; 678129947Sbmilekic m->m_nextpkt = NULL; 679129906Sbmilekic m->m_data = m->m_ext.ext_buf; 680151976Sandre m->m_len = 0; 681151976Sandre m->m_flags = (flags | M_EXT); 682151976Sandre m->m_type = type; 683173029Sobrien 684129906Sbmilekic if (flags & M_PKTHDR) { 685129906Sbmilekic m->m_pkthdr.rcvif = NULL; 686151976Sandre m->m_pkthdr.len = 0; 687151976Sandre m->m_pkthdr.header = NULL; 688129906Sbmilekic m->m_pkthdr.csum_flags = 0; 689151976Sandre m->m_pkthdr.csum_data = 0; 690162377Sandre m->m_pkthdr.tso_segsz = 0; 691162377Sandre m->m_pkthdr.ether_vtag = 0; 692186683Srwatson m->m_pkthdr.flowid = 0; 693129906Sbmilekic SLIST_INIT(&m->m_pkthdr.tags); 694129906Sbmilekic#ifdef MAC 695129906Sbmilekic /* If the label init fails, fail the alloc */ 696172930Srwatson error = mac_mbuf_init(m, how); 697132987Sgreen if (error) 698132987Sgreen return (error); 699129906Sbmilekic#endif 700129906Sbmilekic } 701151976Sandre /* m_ext is already initialized. */ 702151976Sandre 703132987Sgreen return (0); 704129906Sbmilekic} 705129906Sbmilekic 706194515Skmacyint 707194515Skmacym_pkthdr_init(struct mbuf *m, int how) 708194515Skmacy{ 709194515Skmacy#ifdef MAC 710194515Skmacy int error; 711194515Skmacy#endif 712194515Skmacy m->m_data = m->m_pktdat; 713194515Skmacy SLIST_INIT(&m->m_pkthdr.tags); 714194515Skmacy m->m_pkthdr.rcvif = NULL; 715194515Skmacy m->m_pkthdr.header = NULL; 716194515Skmacy m->m_pkthdr.len = 0; 717194515Skmacy m->m_pkthdr.flowid = 0; 718194515Skmacy m->m_pkthdr.csum_flags = 0; 719194515Skmacy m->m_pkthdr.csum_data = 0; 720194515Skmacy m->m_pkthdr.tso_segsz = 0; 721194515Skmacy m->m_pkthdr.ether_vtag = 0; 722194515Skmacy#ifdef MAC 723194515Skmacy /* If the label init fails, fail the alloc */ 724194515Skmacy error = mac_mbuf_init(m, how); 725194515Skmacy if (error) 726194515Skmacy return (error); 727194515Skmacy#endif 728194515Skmacy 729194515Skmacy return (0); 730194515Skmacy} 731194515Skmacy 732129906Sbmilekic/* 733129906Sbmilekic * This is the protocol drain routine. 734129906Sbmilekic * 735129906Sbmilekic * No locks should be held when this is called. The drain routines have to 736129906Sbmilekic * presently acquire some locks which raises the possibility of lock order 737129906Sbmilekic * reversal. 738129906Sbmilekic */ 739129906Sbmilekicstatic void 740129906Sbmilekicmb_reclaim(void *junk) 741129906Sbmilekic{ 742129906Sbmilekic struct domain *dp; 743129906Sbmilekic struct protosw *pr; 744129906Sbmilekic 745129906Sbmilekic WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK | WARN_PANIC, NULL, 746129906Sbmilekic "mb_reclaim()"); 747129906Sbmilekic 748129906Sbmilekic for (dp = domains; dp != NULL; dp = dp->dom_next) 749129906Sbmilekic for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) 750129906Sbmilekic if (pr->pr_drain != NULL) 751129906Sbmilekic (*pr->pr_drain)(); 752129906Sbmilekic} 753