kern_mbuf.c revision 243995
1129906Sbmilekic/*- 2141991Sbmilekic * Copyright (c) 2004, 2005, 3243995Spjd * 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: head/sys/kern/kern_mbuf.c 243995 2012-12-07 22:19:41Z pjd $"); 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> 50129906Sbmilekic#include <vm/uma.h> 51147537Ssilby#include <vm/uma_int.h> 52147537Ssilby#include <vm/uma_dbg.h> 53129906Sbmilekic 54129906Sbmilekic/* 55129906Sbmilekic * In FreeBSD, Mbufs and Mbuf Clusters are allocated from UMA 56129906Sbmilekic * Zones. 57129906Sbmilekic * 58129906Sbmilekic * Mbuf Clusters (2K, contiguous) are allocated from the Cluster 59129906Sbmilekic * Zone. The Zone can be capped at kern.ipc.nmbclusters, if the 60129906Sbmilekic * administrator so desires. 61129906Sbmilekic * 62129906Sbmilekic * Mbufs are allocated from a UMA Master Zone called the Mbuf 63129906Sbmilekic * Zone. 64129906Sbmilekic * 65129906Sbmilekic * Additionally, FreeBSD provides a Packet Zone, which it 66129906Sbmilekic * configures as a Secondary Zone to the Mbuf Master Zone, 67129906Sbmilekic * thus sharing backend Slab kegs with the Mbuf Master Zone. 68129906Sbmilekic * 69129906Sbmilekic * Thus common-case allocations and locking are simplified: 70129906Sbmilekic * 71129906Sbmilekic * m_clget() m_getcl() 72129906Sbmilekic * | | 73129906Sbmilekic * | .------------>[(Packet Cache)] m_get(), m_gethdr() 74129906Sbmilekic * | | [ Packet ] | 75129906Sbmilekic * [(Cluster Cache)] [ Secondary ] [ (Mbuf Cache) ] 76129906Sbmilekic * [ Cluster Zone ] [ Zone ] [ Mbuf Master Zone ] 77129906Sbmilekic * | \________ | 78129906Sbmilekic * [ Cluster Keg ] \ / 79243995Spjd * | [ Mbuf Keg ] 80129906Sbmilekic * [ Cluster Slabs ] | 81129906Sbmilekic * | [ Mbuf Slabs ] 82129906Sbmilekic * \____________(VM)_________________/ 83151976Sandre * 84151976Sandre * 85156023Sglebius * Whenever an object is allocated with uma_zalloc() out of 86151976Sandre * one of the Zones its _ctor_ function is executed. The same 87156023Sglebius * for any deallocation through uma_zfree() the _dtor_ function 88151976Sandre * is executed. 89156023Sglebius * 90151976Sandre * Caches are per-CPU and are filled from the Master Zone. 91151976Sandre * 92156023Sglebius * Whenever an object is allocated from the underlying global 93151976Sandre * memory pool it gets pre-initialized with the _zinit_ functions. 94151976Sandre * When the Keg's are overfull objects get decomissioned with 95151976Sandre * _zfini_ functions and free'd back to the global memory pool. 96151976Sandre * 97129906Sbmilekic */ 98129906Sbmilekic 99243631Sandreint nmbufs; /* limits number of mbufs */ 100151976Sandreint nmbclusters; /* limits number of mbuf clusters */ 101155780Sandreint nmbjumbop; /* limits number of page size jumbo clusters */ 102151976Sandreint nmbjumbo9; /* limits number of 9k jumbo clusters */ 103151976Sandreint nmbjumbo16; /* limits number of 16k jumbo clusters */ 104129906Sbmilekicstruct mbstat mbstat; 105129906Sbmilekic 106185893Sbz/* 107185893Sbz * tunable_mbinit() has to be run before init_maxsockets() thus 108185893Sbz * the SYSINIT order below is SI_ORDER_MIDDLE while init_maxsockets() 109185893Sbz * runs at SI_ORDER_ANY. 110243639Sandre * 111243639Sandre * NB: This has to be done before VM init. 112185893Sbz */ 113129906Sbmilekicstatic void 114129906Sbmilekictunable_mbinit(void *dummy) 115129906Sbmilekic{ 116129906Sbmilekic 117239624Snp TUNABLE_INT_FETCH("kern.ipc.nmbclusters", &nmbclusters); 118243639Sandre if (nmbclusters == 0) 119243639Sandre nmbclusters = maxmbufmem / MCLBYTES / 4; 120239624Snp 121239624Snp TUNABLE_INT_FETCH("kern.ipc.nmbjumbop", &nmbjumbop); 122239624Snp if (nmbjumbop == 0) 123243639Sandre nmbjumbop = maxmbufmem / MJUMPAGESIZE / 4; 124239624Snp 125239624Snp TUNABLE_INT_FETCH("kern.ipc.nmbjumbo9", &nmbjumbo9); 126239624Snp if (nmbjumbo9 == 0) 127243639Sandre nmbjumbo9 = maxmbufmem / MJUM9BYTES / 6; 128239624Snp 129239624Snp TUNABLE_INT_FETCH("kern.ipc.nmbjumbo16", &nmbjumbo16); 130239624Snp if (nmbjumbo16 == 0) 131243639Sandre nmbjumbo16 = maxmbufmem / MJUM16BYTES / 6; 132243639Sandre 133243639Sandre /* 134243639Sandre * We need at least as many mbufs as we have clusters of 135243639Sandre * the various types added together. 136243639Sandre */ 137243639Sandre TUNABLE_INT_FETCH("kern.ipc.nmbufs", &nmbufs); 138243639Sandre if (nmbufs < nmbclusters + nmbjumbop + nmbjumbo9 + nmbjumbo16) 139243639Sandre nmbufs = lmax(maxmbufmem / MSIZE / 5, 140243639Sandre nmbclusters + nmbjumbop + nmbjumbo9 + nmbjumbo16); 141243639Sandre 142129906Sbmilekic} 143185893SbzSYSINIT(tunable_mbinit, SI_SUB_TUNABLES, SI_ORDER_MIDDLE, tunable_mbinit, NULL); 144129906Sbmilekic 145157927Spsstatic int 146157927Spssysctl_nmbclusters(SYSCTL_HANDLER_ARGS) 147157927Sps{ 148157927Sps int error, newnmbclusters; 149157927Sps 150157927Sps newnmbclusters = nmbclusters; 151243995Spjd error = sysctl_handle_int(oidp, &newnmbclusters, 0, req); 152157927Sps if (error == 0 && req->newptr) { 153243631Sandre if (newnmbclusters > nmbclusters && 154243631Sandre nmbufs >= nmbclusters + nmbjumbop + nmbjumbo9 + nmbjumbo16) { 155157927Sps nmbclusters = newnmbclusters; 156157927Sps uma_zone_set_max(zone_clust, nmbclusters); 157243631Sandre nmbclusters = uma_zone_get_max(zone_clust); 158157927Sps EVENTHANDLER_INVOKE(nmbclusters_change); 159157927Sps } else 160157927Sps error = EINVAL; 161157927Sps } 162157927Sps return (error); 163157927Sps} 164157927SpsSYSCTL_PROC(_kern_ipc, OID_AUTO, nmbclusters, CTLTYPE_INT|CTLFLAG_RW, 165157927Sps&nmbclusters, 0, sysctl_nmbclusters, "IU", 166129906Sbmilekic "Maximum number of mbuf clusters allowed"); 167174292Srrs 168174292Srrsstatic int 169174292Srrssysctl_nmbjumbop(SYSCTL_HANDLER_ARGS) 170174292Srrs{ 171174292Srrs int error, newnmbjumbop; 172174292Srrs 173174292Srrs newnmbjumbop = nmbjumbop; 174243995Spjd error = sysctl_handle_int(oidp, &newnmbjumbop, 0, req); 175174292Srrs if (error == 0 && req->newptr) { 176243631Sandre if (newnmbjumbop > nmbjumbop && 177243631Sandre nmbufs >= nmbclusters + nmbjumbop + nmbjumbo9 + nmbjumbo16) { 178174292Srrs nmbjumbop = newnmbjumbop; 179174292Srrs uma_zone_set_max(zone_jumbop, nmbjumbop); 180243631Sandre nmbjumbop = uma_zone_get_max(zone_jumbop); 181174292Srrs } else 182174292Srrs error = EINVAL; 183174292Srrs } 184174292Srrs return (error); 185174292Srrs} 186174292SrrsSYSCTL_PROC(_kern_ipc, OID_AUTO, nmbjumbop, CTLTYPE_INT|CTLFLAG_RW, 187174292Srrs&nmbjumbop, 0, sysctl_nmbjumbop, "IU", 188243995Spjd "Maximum number of mbuf page size jumbo clusters allowed"); 189174292Srrs 190174292Srrsstatic int 191174292Srrssysctl_nmbjumbo9(SYSCTL_HANDLER_ARGS) 192174292Srrs{ 193174292Srrs int error, newnmbjumbo9; 194174292Srrs 195174292Srrs newnmbjumbo9 = nmbjumbo9; 196243995Spjd error = sysctl_handle_int(oidp, &newnmbjumbo9, 0, req); 197174292Srrs if (error == 0 && req->newptr) { 198243631Sandre if (newnmbjumbo9 > nmbjumbo9&& 199243631Sandre nmbufs >= nmbclusters + nmbjumbop + nmbjumbo9 + nmbjumbo16) { 200174292Srrs nmbjumbo9 = newnmbjumbo9; 201174292Srrs uma_zone_set_max(zone_jumbo9, nmbjumbo9); 202243631Sandre nmbjumbo9 = uma_zone_get_max(zone_jumbo9); 203174292Srrs } else 204174292Srrs error = EINVAL; 205174292Srrs } 206174292Srrs return (error); 207174292Srrs} 208174292SrrsSYSCTL_PROC(_kern_ipc, OID_AUTO, nmbjumbo9, CTLTYPE_INT|CTLFLAG_RW, 209174292Srrs&nmbjumbo9, 0, sysctl_nmbjumbo9, "IU", 210243995Spjd "Maximum number of mbuf 9k jumbo clusters allowed"); 211174292Srrs 212174292Srrsstatic int 213174292Srrssysctl_nmbjumbo16(SYSCTL_HANDLER_ARGS) 214174292Srrs{ 215174292Srrs int error, newnmbjumbo16; 216174292Srrs 217174292Srrs newnmbjumbo16 = nmbjumbo16; 218243995Spjd error = sysctl_handle_int(oidp, &newnmbjumbo16, 0, req); 219174292Srrs if (error == 0 && req->newptr) { 220243631Sandre if (newnmbjumbo16 > nmbjumbo16 && 221243631Sandre nmbufs >= nmbclusters + nmbjumbop + nmbjumbo9 + nmbjumbo16) { 222174292Srrs nmbjumbo16 = newnmbjumbo16; 223174292Srrs uma_zone_set_max(zone_jumbo16, nmbjumbo16); 224243631Sandre nmbjumbo16 = uma_zone_get_max(zone_jumbo16); 225174292Srrs } else 226174292Srrs error = EINVAL; 227174292Srrs } 228174292Srrs return (error); 229174292Srrs} 230174292SrrsSYSCTL_PROC(_kern_ipc, OID_AUTO, nmbjumbo16, CTLTYPE_INT|CTLFLAG_RW, 231174292Srrs&nmbjumbo16, 0, sysctl_nmbjumbo16, "IU", 232151976Sandre "Maximum number of mbuf 16k jumbo clusters allowed"); 233174292Srrs 234243631Sandrestatic int 235243631Sandresysctl_nmbufs(SYSCTL_HANDLER_ARGS) 236243631Sandre{ 237243631Sandre int error, newnmbufs; 238174292Srrs 239243631Sandre newnmbufs = nmbufs; 240243995Spjd error = sysctl_handle_int(oidp, &newnmbufs, 0, req); 241243631Sandre if (error == 0 && req->newptr) { 242243631Sandre if (newnmbufs > nmbufs) { 243243631Sandre nmbufs = newnmbufs; 244243631Sandre uma_zone_set_max(zone_mbuf, nmbufs); 245243639Sandre nmbufs = uma_zone_get_max(zone_mbuf); 246243631Sandre EVENTHANDLER_INVOKE(nmbufs_change); 247243631Sandre } else 248243631Sandre error = EINVAL; 249243631Sandre } 250243631Sandre return (error); 251243631Sandre} 252243631SandreSYSCTL_PROC(_kern_ipc, OID_AUTO, nmbuf, CTLTYPE_INT|CTLFLAG_RW, 253243631Sandre&nmbufs, 0, sysctl_nmbufs, "IU", 254243631Sandre "Maximum number of mbufs allowed"); 255174292Srrs 256129906SbmilekicSYSCTL_STRUCT(_kern_ipc, OID_AUTO, mbstat, CTLFLAG_RD, &mbstat, mbstat, 257129906Sbmilekic "Mbuf general information and statistics"); 258129906Sbmilekic 259129906Sbmilekic/* 260129906Sbmilekic * Zones from which we allocate. 261129906Sbmilekic */ 262129906Sbmilekicuma_zone_t zone_mbuf; 263129906Sbmilekicuma_zone_t zone_clust; 264129906Sbmilekicuma_zone_t zone_pack; 265155780Sandreuma_zone_t zone_jumbop; 266151976Sandreuma_zone_t zone_jumbo9; 267151976Sandreuma_zone_t zone_jumbo16; 268151976Sandreuma_zone_t zone_ext_refcnt; 269129906Sbmilekic 270129906Sbmilekic/* 271129906Sbmilekic * Local prototypes. 272129906Sbmilekic */ 273132987Sgreenstatic int mb_ctor_mbuf(void *, int, void *, int); 274132987Sgreenstatic int mb_ctor_clust(void *, int, void *, int); 275132987Sgreenstatic int mb_ctor_pack(void *, int, void *, int); 276129906Sbmilekicstatic void mb_dtor_mbuf(void *, int, void *); 277151976Sandrestatic void mb_dtor_clust(void *, int, void *); 278151976Sandrestatic void mb_dtor_pack(void *, int, void *); 279151976Sandrestatic int mb_zinit_pack(void *, int, int); 280151976Sandrestatic void mb_zfini_pack(void *, int); 281129906Sbmilekic 282129906Sbmilekicstatic void mb_reclaim(void *); 283129906Sbmilekicstatic void mbuf_init(void *); 284209390Sedstatic void *mbuf_jumbo_alloc(uma_zone_t, int, uint8_t *, int); 285129906Sbmilekic 286242304Skevlo/* Ensure that MSIZE must be a power of 2. */ 287135510SbrianCTASSERT((((MSIZE - 1) ^ MSIZE) + 1) >> 1 == MSIZE); 288135510Sbrian 289129906Sbmilekic/* 290129906Sbmilekic * Initialize FreeBSD Network buffer allocation. 291129906Sbmilekic */ 292177253SrwatsonSYSINIT(mbuf, SI_SUB_MBUF, SI_ORDER_FIRST, mbuf_init, NULL); 293129906Sbmilekicstatic void 294129906Sbmilekicmbuf_init(void *dummy) 295129906Sbmilekic{ 296129906Sbmilekic 297129906Sbmilekic /* 298129906Sbmilekic * Configure UMA zones for Mbufs, Clusters, and Packets. 299129906Sbmilekic */ 300151976Sandre zone_mbuf = uma_zcreate(MBUF_MEM_NAME, MSIZE, 301151976Sandre mb_ctor_mbuf, mb_dtor_mbuf, 302147537Ssilby#ifdef INVARIANTS 303151976Sandre trash_init, trash_fini, 304147537Ssilby#else 305151976Sandre NULL, NULL, 306147537Ssilby#endif 307151976Sandre MSIZE - 1, UMA_ZONE_MAXBUCKET); 308243631Sandre if (nmbufs > 0) { 309243631Sandre uma_zone_set_max(zone_mbuf, nmbufs); 310243631Sandre nmbufs = uma_zone_get_max(zone_mbuf); 311243631Sandre } 312151976Sandre 313148095Srwatson zone_clust = uma_zcreate(MBUF_CLUSTER_MEM_NAME, MCLBYTES, 314151976Sandre mb_ctor_clust, mb_dtor_clust, 315147537Ssilby#ifdef INVARIANTS 316151976Sandre trash_init, trash_fini, 317147537Ssilby#else 318151976Sandre NULL, NULL, 319147537Ssilby#endif 320151976Sandre UMA_ALIGN_PTR, UMA_ZONE_REFCNT); 321243631Sandre if (nmbclusters > 0) { 322129906Sbmilekic uma_zone_set_max(zone_clust, nmbclusters); 323243631Sandre nmbclusters = uma_zone_get_max(zone_clust); 324243631Sandre } 325151976Sandre 326148095Srwatson zone_pack = uma_zsecond_create(MBUF_PACKET_MEM_NAME, mb_ctor_pack, 327151976Sandre mb_dtor_pack, mb_zinit_pack, mb_zfini_pack, zone_mbuf); 328129906Sbmilekic 329156023Sglebius /* Make jumbo frame zone too. Page size, 9k and 16k. */ 330155780Sandre zone_jumbop = uma_zcreate(MBUF_JUMBOP_MEM_NAME, MJUMPAGESIZE, 331153232Sandre mb_ctor_clust, mb_dtor_clust, 332153232Sandre#ifdef INVARIANTS 333153232Sandre trash_init, trash_fini, 334153232Sandre#else 335153232Sandre NULL, NULL, 336153232Sandre#endif 337153232Sandre UMA_ALIGN_PTR, UMA_ZONE_REFCNT); 338243631Sandre if (nmbjumbop > 0) { 339155780Sandre uma_zone_set_max(zone_jumbop, nmbjumbop); 340243631Sandre nmbjumbop = uma_zone_get_max(zone_jumbop); 341243631Sandre } 342153232Sandre 343151976Sandre zone_jumbo9 = uma_zcreate(MBUF_JUMBO9_MEM_NAME, MJUM9BYTES, 344151976Sandre mb_ctor_clust, mb_dtor_clust, 345151976Sandre#ifdef INVARIANTS 346151976Sandre trash_init, trash_fini, 347151976Sandre#else 348151976Sandre NULL, NULL, 349151976Sandre#endif 350151976Sandre UMA_ALIGN_PTR, UMA_ZONE_REFCNT); 351243631Sandre uma_zone_set_allocf(zone_jumbo9, mbuf_jumbo_alloc); 352243631Sandre if (nmbjumbo9 > 0) { 353151976Sandre uma_zone_set_max(zone_jumbo9, nmbjumbo9); 354243631Sandre nmbjumbo9 = uma_zone_get_max(zone_jumbo9); 355243631Sandre } 356129906Sbmilekic 357151976Sandre zone_jumbo16 = uma_zcreate(MBUF_JUMBO16_MEM_NAME, MJUM16BYTES, 358151976Sandre mb_ctor_clust, mb_dtor_clust, 359151976Sandre#ifdef INVARIANTS 360151976Sandre trash_init, trash_fini, 361151976Sandre#else 362151976Sandre NULL, NULL, 363151976Sandre#endif 364151976Sandre UMA_ALIGN_PTR, UMA_ZONE_REFCNT); 365243631Sandre uma_zone_set_allocf(zone_jumbo16, mbuf_jumbo_alloc); 366243631Sandre if (nmbjumbo16 > 0) { 367151976Sandre uma_zone_set_max(zone_jumbo16, nmbjumbo16); 368243631Sandre nmbjumbo16 = uma_zone_get_max(zone_jumbo16); 369243631Sandre } 370151976Sandre 371151976Sandre zone_ext_refcnt = uma_zcreate(MBUF_EXTREFCNT_MEM_NAME, sizeof(u_int), 372151976Sandre NULL, NULL, 373151976Sandre NULL, NULL, 374151976Sandre UMA_ALIGN_PTR, UMA_ZONE_ZINIT); 375151976Sandre 376151976Sandre /* uma_prealloc() goes here... */ 377151976Sandre 378129906Sbmilekic /* 379129906Sbmilekic * Hook event handler for low-memory situation, used to 380129906Sbmilekic * drain protocols and push data back to the caches (UMA 381129906Sbmilekic * later pushes it back to VM). 382129906Sbmilekic */ 383129906Sbmilekic EVENTHANDLER_REGISTER(vm_lowmem, mb_reclaim, NULL, 384129906Sbmilekic EVENTHANDLER_PRI_FIRST); 385129906Sbmilekic 386129906Sbmilekic /* 387129906Sbmilekic * [Re]set counters and local statistics knobs. 388129906Sbmilekic * XXX Some of these should go and be replaced, but UMA stat 389129906Sbmilekic * gathering needs to be revised. 390129906Sbmilekic */ 391129906Sbmilekic mbstat.m_mbufs = 0; 392129906Sbmilekic mbstat.m_mclusts = 0; 393129906Sbmilekic mbstat.m_drain = 0; 394129906Sbmilekic mbstat.m_msize = MSIZE; 395129906Sbmilekic mbstat.m_mclbytes = MCLBYTES; 396129906Sbmilekic mbstat.m_minclsize = MINCLSIZE; 397129906Sbmilekic mbstat.m_mlen = MLEN; 398129906Sbmilekic mbstat.m_mhlen = MHLEN; 399129906Sbmilekic mbstat.m_numtypes = MT_NTYPES; 400129906Sbmilekic 401129906Sbmilekic mbstat.m_mcfail = mbstat.m_mpfail = 0; 402129906Sbmilekic mbstat.sf_iocnt = 0; 403129906Sbmilekic mbstat.sf_allocwait = mbstat.sf_allocfail = 0; 404129906Sbmilekic} 405129906Sbmilekic 406129906Sbmilekic/* 407174247Salc * UMA backend page allocator for the jumbo frame zones. 408174247Salc * 409174247Salc * Allocates kernel virtual memory that is backed by contiguous physical 410174247Salc * pages. 411174247Salc */ 412174247Salcstatic void * 413209390Sedmbuf_jumbo_alloc(uma_zone_t zone, int bytes, uint8_t *flags, int wait) 414174247Salc{ 415174247Salc 416177921Salc /* Inform UMA that this allocator uses kernel_map/object. */ 417177921Salc *flags = UMA_SLAB_KERNEL; 418194454Salc return ((void *)kmem_alloc_contig(kernel_map, bytes, wait, 419195649Salc (vm_paddr_t)0, ~(vm_paddr_t)0, 1, 0, VM_MEMATTR_DEFAULT)); 420174247Salc} 421174247Salc 422174247Salc/* 423129906Sbmilekic * Constructor for Mbuf master zone. 424129906Sbmilekic * 425129906Sbmilekic * The 'arg' pointer points to a mb_args structure which 426129906Sbmilekic * contains call-specific information required to support the 427151976Sandre * mbuf allocation API. See mbuf.h. 428129906Sbmilekic */ 429132987Sgreenstatic int 430132987Sgreenmb_ctor_mbuf(void *mem, int size, void *arg, int how) 431129906Sbmilekic{ 432129906Sbmilekic struct mbuf *m; 433129906Sbmilekic struct mb_args *args; 434132987Sgreen#ifdef MAC 435132987Sgreen int error; 436132987Sgreen#endif 437129906Sbmilekic int flags; 438129906Sbmilekic short type; 439129906Sbmilekic 440147537Ssilby#ifdef INVARIANTS 441147537Ssilby trash_ctor(mem, size, arg, how); 442147537Ssilby#endif 443129906Sbmilekic m = (struct mbuf *)mem; 444129906Sbmilekic args = (struct mb_args *)arg; 445129906Sbmilekic flags = args->flags; 446129906Sbmilekic type = args->type; 447129906Sbmilekic 448151976Sandre /* 449151976Sandre * The mbuf is initialized later. The caller has the 450156059Sglebius * responsibility to set up any MAC labels too. 451151976Sandre */ 452151976Sandre if (type == MT_NOINIT) 453151976Sandre return (0); 454151976Sandre 455129906Sbmilekic m->m_next = NULL; 456129906Sbmilekic m->m_nextpkt = NULL; 457151976Sandre m->m_len = 0; 458129947Sbmilekic m->m_flags = flags; 459151976Sandre m->m_type = type; 460129906Sbmilekic if (flags & M_PKTHDR) { 461129906Sbmilekic m->m_data = m->m_pktdat; 462129906Sbmilekic m->m_pkthdr.rcvif = NULL; 463184778Skmacy m->m_pkthdr.header = NULL; 464151976Sandre m->m_pkthdr.len = 0; 465129906Sbmilekic m->m_pkthdr.csum_flags = 0; 466151976Sandre m->m_pkthdr.csum_data = 0; 467162377Sandre m->m_pkthdr.tso_segsz = 0; 468162377Sandre m->m_pkthdr.ether_vtag = 0; 469186683Srwatson m->m_pkthdr.flowid = 0; 470129906Sbmilekic SLIST_INIT(&m->m_pkthdr.tags); 471129906Sbmilekic#ifdef MAC 472129906Sbmilekic /* If the label init fails, fail the alloc */ 473172930Srwatson error = mac_mbuf_init(m, how); 474132987Sgreen if (error) 475132987Sgreen return (error); 476129906Sbmilekic#endif 477129947Sbmilekic } else 478129906Sbmilekic m->m_data = m->m_dat; 479132987Sgreen return (0); 480129906Sbmilekic} 481129906Sbmilekic 482129906Sbmilekic/* 483151976Sandre * The Mbuf master zone destructor. 484129906Sbmilekic */ 485129906Sbmilekicstatic void 486129906Sbmilekicmb_dtor_mbuf(void *mem, int size, void *arg) 487129906Sbmilekic{ 488129906Sbmilekic struct mbuf *m; 489243995Spjd unsigned long flags; 490129906Sbmilekic 491129906Sbmilekic m = (struct mbuf *)mem; 492172462Skmacy flags = (unsigned long)arg; 493173029Sobrien 494172462Skmacy if ((flags & MB_NOTAGS) == 0 && (m->m_flags & M_PKTHDR) != 0) 495129906Sbmilekic m_tag_delete_chain(m, NULL); 496151976Sandre KASSERT((m->m_flags & M_EXT) == 0, ("%s: M_EXT set", __func__)); 497173029Sobrien KASSERT((m->m_flags & M_NOFREE) == 0, ("%s: M_NOFREE set", __func__)); 498147537Ssilby#ifdef INVARIANTS 499147537Ssilby trash_dtor(mem, size, arg); 500147537Ssilby#endif 501129906Sbmilekic} 502129906Sbmilekic 503151976Sandre/* 504151976Sandre * The Mbuf Packet zone destructor. 505151976Sandre */ 506129906Sbmilekicstatic void 507129906Sbmilekicmb_dtor_pack(void *mem, int size, void *arg) 508129906Sbmilekic{ 509129906Sbmilekic struct mbuf *m; 510129906Sbmilekic 511129906Sbmilekic m = (struct mbuf *)mem; 512129906Sbmilekic if ((m->m_flags & M_PKTHDR) != 0) 513129906Sbmilekic m_tag_delete_chain(m, NULL); 514151976Sandre 515151976Sandre /* Make sure we've got a clean cluster back. */ 516151976Sandre KASSERT((m->m_flags & M_EXT) == M_EXT, ("%s: M_EXT not set", __func__)); 517151976Sandre KASSERT(m->m_ext.ext_buf != NULL, ("%s: ext_buf == NULL", __func__)); 518151976Sandre KASSERT(m->m_ext.ext_free == NULL, ("%s: ext_free != NULL", __func__)); 519175872Sphk KASSERT(m->m_ext.ext_arg1 == NULL, ("%s: ext_arg1 != NULL", __func__)); 520175872Sphk KASSERT(m->m_ext.ext_arg2 == NULL, ("%s: ext_arg2 != NULL", __func__)); 521151976Sandre KASSERT(m->m_ext.ext_size == MCLBYTES, ("%s: ext_size != MCLBYTES", __func__)); 522152130Sglebius KASSERT(m->m_ext.ext_type == EXT_PACKET, ("%s: ext_type != EXT_PACKET", __func__)); 523151976Sandre KASSERT(*m->m_ext.ref_cnt == 1, ("%s: ref_cnt != 1", __func__)); 524147537Ssilby#ifdef INVARIANTS 525147537Ssilby trash_dtor(m->m_ext.ext_buf, MCLBYTES, arg); 526147537Ssilby#endif 527166213Smohans /* 528173029Sobrien * If there are processes blocked on zone_clust, waiting for pages 529173029Sobrien * to be freed up, * cause them to be woken up by draining the 530173029Sobrien * packet zone. We are exposed to a race here * (in the check for 531173029Sobrien * the UMA_ZFLAG_FULL) where we might miss the flag set, but that 532173029Sobrien * is deliberate. We don't want to acquire the zone lock for every 533173029Sobrien * mbuf free. 534166213Smohans */ 535173029Sobrien if (uma_zone_exhausted_nolock(zone_clust)) 536173029Sobrien zone_drain(zone_pack); 537129906Sbmilekic} 538129906Sbmilekic 539129906Sbmilekic/* 540155780Sandre * The Cluster and Jumbo[PAGESIZE|9|16] zone constructor. 541129906Sbmilekic * 542129906Sbmilekic * Here the 'arg' pointer points to the Mbuf which we 543151976Sandre * are configuring cluster storage for. If 'arg' is 544151976Sandre * empty we allocate just the cluster without setting 545151976Sandre * the mbuf to it. See mbuf.h. 546129906Sbmilekic */ 547132987Sgreenstatic int 548132987Sgreenmb_ctor_clust(void *mem, int size, void *arg, int how) 549129906Sbmilekic{ 550129906Sbmilekic struct mbuf *m; 551151976Sandre u_int *refcnt; 552168374Skmacy int type; 553168374Skmacy uma_zone_t zone; 554173029Sobrien 555147537Ssilby#ifdef INVARIANTS 556147537Ssilby trash_ctor(mem, size, arg, how); 557147537Ssilby#endif 558168374Skmacy switch (size) { 559168374Skmacy case MCLBYTES: 560168374Skmacy type = EXT_CLUSTER; 561168374Skmacy zone = zone_clust; 562168374Skmacy break; 563168374Skmacy#if MJUMPAGESIZE != MCLBYTES 564168374Skmacy case MJUMPAGESIZE: 565168374Skmacy type = EXT_JUMBOP; 566168374Skmacy zone = zone_jumbop; 567168374Skmacy break; 568168374Skmacy#endif 569168374Skmacy case MJUM9BYTES: 570168374Skmacy type = EXT_JUMBO9; 571168374Skmacy zone = zone_jumbo9; 572168374Skmacy break; 573168374Skmacy case MJUM16BYTES: 574168374Skmacy type = EXT_JUMBO16; 575168374Skmacy zone = zone_jumbo16; 576168374Skmacy break; 577168374Skmacy default: 578168374Skmacy panic("unknown cluster size"); 579168374Skmacy break; 580168374Skmacy } 581168374Skmacy 582129906Sbmilekic m = (struct mbuf *)arg; 583168374Skmacy refcnt = uma_find_refcnt(zone, mem); 584173029Sobrien *refcnt = 1; 585151976Sandre if (m != NULL) { 586151976Sandre m->m_ext.ext_buf = (caddr_t)mem; 587151976Sandre m->m_data = m->m_ext.ext_buf; 588151976Sandre m->m_flags |= M_EXT; 589151976Sandre m->m_ext.ext_free = NULL; 590175872Sphk m->m_ext.ext_arg1 = NULL; 591175872Sphk m->m_ext.ext_arg2 = NULL; 592151976Sandre m->m_ext.ext_size = size; 593151976Sandre m->m_ext.ext_type = type; 594168374Skmacy m->m_ext.ref_cnt = refcnt; 595151976Sandre } 596168374Skmacy 597132987Sgreen return (0); 598129906Sbmilekic} 599129906Sbmilekic 600151976Sandre/* 601151976Sandre * The Mbuf Cluster zone destructor. 602151976Sandre */ 603129906Sbmilekicstatic void 604129906Sbmilekicmb_dtor_clust(void *mem, int size, void *arg) 605129906Sbmilekic{ 606168374Skmacy#ifdef INVARIANTS 607168374Skmacy uma_zone_t zone; 608151976Sandre 609168374Skmacy zone = m_getzone(size); 610168374Skmacy KASSERT(*(uma_find_refcnt(zone, mem)) <= 1, 611152035Sandre ("%s: refcnt incorrect %u", __func__, 612168374Skmacy *(uma_find_refcnt(zone, mem))) ); 613168374Skmacy 614147537Ssilby trash_dtor(mem, size, arg); 615147537Ssilby#endif 616129906Sbmilekic} 617129906Sbmilekic 618129906Sbmilekic/* 619129906Sbmilekic * The Packet secondary zone's init routine, executed on the 620151976Sandre * object's transition from mbuf keg slab to zone cache. 621129906Sbmilekic */ 622132987Sgreenstatic int 623151976Sandremb_zinit_pack(void *mem, int size, int how) 624129906Sbmilekic{ 625129906Sbmilekic struct mbuf *m; 626129906Sbmilekic 627151976Sandre m = (struct mbuf *)mem; /* m is virgin. */ 628156428Sandre if (uma_zalloc_arg(zone_clust, m, how) == NULL || 629156428Sandre m->m_ext.ext_buf == NULL) 630132987Sgreen return (ENOMEM); 631152101Sandre m->m_ext.ext_type = EXT_PACKET; /* Override. */ 632147537Ssilby#ifdef INVARIANTS 633147537Ssilby trash_init(m->m_ext.ext_buf, MCLBYTES, how); 634147537Ssilby#endif 635132987Sgreen return (0); 636129906Sbmilekic} 637129906Sbmilekic 638129906Sbmilekic/* 639129906Sbmilekic * The Packet secondary zone's fini routine, executed on the 640129906Sbmilekic * object's transition from zone cache to keg slab. 641129906Sbmilekic */ 642129906Sbmilekicstatic void 643151976Sandremb_zfini_pack(void *mem, int size) 644129906Sbmilekic{ 645129906Sbmilekic struct mbuf *m; 646129906Sbmilekic 647129906Sbmilekic m = (struct mbuf *)mem; 648147537Ssilby#ifdef INVARIANTS 649147537Ssilby trash_fini(m->m_ext.ext_buf, MCLBYTES); 650147537Ssilby#endif 651129906Sbmilekic uma_zfree_arg(zone_clust, m->m_ext.ext_buf, NULL); 652147652Ssilby#ifdef INVARIANTS 653147652Ssilby trash_dtor(mem, size, NULL); 654147652Ssilby#endif 655129906Sbmilekic} 656129906Sbmilekic 657129906Sbmilekic/* 658129906Sbmilekic * The "packet" keg constructor. 659129906Sbmilekic */ 660132987Sgreenstatic int 661132987Sgreenmb_ctor_pack(void *mem, int size, void *arg, int how) 662129906Sbmilekic{ 663129906Sbmilekic struct mbuf *m; 664129906Sbmilekic struct mb_args *args; 665132987Sgreen#ifdef MAC 666132987Sgreen int error; 667132987Sgreen#endif 668132987Sgreen int flags; 669129906Sbmilekic short type; 670129906Sbmilekic 671129906Sbmilekic m = (struct mbuf *)mem; 672129906Sbmilekic args = (struct mb_args *)arg; 673129906Sbmilekic flags = args->flags; 674129906Sbmilekic type = args->type; 675129906Sbmilekic 676147537Ssilby#ifdef INVARIANTS 677147537Ssilby trash_ctor(m->m_ext.ext_buf, MCLBYTES, arg, how); 678147537Ssilby#endif 679129906Sbmilekic m->m_next = NULL; 680129947Sbmilekic m->m_nextpkt = NULL; 681129906Sbmilekic m->m_data = m->m_ext.ext_buf; 682151976Sandre m->m_len = 0; 683151976Sandre m->m_flags = (flags | M_EXT); 684151976Sandre m->m_type = type; 685173029Sobrien 686129906Sbmilekic if (flags & M_PKTHDR) { 687129906Sbmilekic m->m_pkthdr.rcvif = NULL; 688151976Sandre m->m_pkthdr.len = 0; 689151976Sandre m->m_pkthdr.header = NULL; 690129906Sbmilekic m->m_pkthdr.csum_flags = 0; 691151976Sandre m->m_pkthdr.csum_data = 0; 692162377Sandre m->m_pkthdr.tso_segsz = 0; 693162377Sandre m->m_pkthdr.ether_vtag = 0; 694186683Srwatson m->m_pkthdr.flowid = 0; 695129906Sbmilekic SLIST_INIT(&m->m_pkthdr.tags); 696129906Sbmilekic#ifdef MAC 697129906Sbmilekic /* If the label init fails, fail the alloc */ 698172930Srwatson error = mac_mbuf_init(m, how); 699132987Sgreen if (error) 700132987Sgreen return (error); 701129906Sbmilekic#endif 702129906Sbmilekic } 703151976Sandre /* m_ext is already initialized. */ 704151976Sandre 705132987Sgreen return (0); 706129906Sbmilekic} 707129906Sbmilekic 708194515Skmacyint 709194515Skmacym_pkthdr_init(struct mbuf *m, int how) 710194515Skmacy{ 711194515Skmacy#ifdef MAC 712194515Skmacy int error; 713194515Skmacy#endif 714194515Skmacy m->m_data = m->m_pktdat; 715194515Skmacy SLIST_INIT(&m->m_pkthdr.tags); 716194515Skmacy m->m_pkthdr.rcvif = NULL; 717194515Skmacy m->m_pkthdr.header = NULL; 718194515Skmacy m->m_pkthdr.len = 0; 719194515Skmacy m->m_pkthdr.flowid = 0; 720194515Skmacy m->m_pkthdr.csum_flags = 0; 721194515Skmacy m->m_pkthdr.csum_data = 0; 722194515Skmacy m->m_pkthdr.tso_segsz = 0; 723194515Skmacy m->m_pkthdr.ether_vtag = 0; 724194515Skmacy#ifdef MAC 725194515Skmacy /* If the label init fails, fail the alloc */ 726194515Skmacy error = mac_mbuf_init(m, how); 727194515Skmacy if (error) 728194515Skmacy return (error); 729194515Skmacy#endif 730194515Skmacy 731194515Skmacy return (0); 732194515Skmacy} 733194515Skmacy 734129906Sbmilekic/* 735129906Sbmilekic * This is the protocol drain routine. 736129906Sbmilekic * 737129906Sbmilekic * No locks should be held when this is called. The drain routines have to 738129906Sbmilekic * presently acquire some locks which raises the possibility of lock order 739129906Sbmilekic * reversal. 740129906Sbmilekic */ 741129906Sbmilekicstatic void 742129906Sbmilekicmb_reclaim(void *junk) 743129906Sbmilekic{ 744129906Sbmilekic struct domain *dp; 745129906Sbmilekic struct protosw *pr; 746129906Sbmilekic 747129906Sbmilekic WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK | WARN_PANIC, NULL, 748129906Sbmilekic "mb_reclaim()"); 749129906Sbmilekic 750129906Sbmilekic for (dp = domains; dp != NULL; dp = dp->dom_next) 751129906Sbmilekic for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) 752129906Sbmilekic if (pr->pr_drain != NULL) 753129906Sbmilekic (*pr->pr_drain)(); 754129906Sbmilekic} 755