From a9153ec3040f54fa52b68e14dafed2aba7b780ae Mon Sep 17 00:00:00 2001 From: Joel Sherrill Date: Wed, 7 Mar 2012 09:52:04 -0600 Subject: Initial import Code is based on FreeBSD 8.2 with USB support from Sebastian Huber and Thomas Doerfler. Initial TCP/IP stack work is from Kevel Kirspel. --- rtems/freebsd/kern/kern_mbuf.c | 706 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 706 insertions(+) create mode 100644 rtems/freebsd/kern/kern_mbuf.c (limited to 'rtems/freebsd/kern/kern_mbuf.c') diff --git a/rtems/freebsd/kern/kern_mbuf.c b/rtems/freebsd/kern/kern_mbuf.c new file mode 100644 index 00000000..e4ef9a71 --- /dev/null +++ b/rtems/freebsd/kern/kern_mbuf.c @@ -0,0 +1,706 @@ +#include + +/*- + * Copyright (c) 2004, 2005, + * Bosko Milekic . All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice unmodified, this list of conditions and the following + * disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include +__FBSDID("$FreeBSD$"); + +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#ifndef __rtems__ +#include +#include +#include +#include +#endif +#include +#include +#include + +/* + * In FreeBSD, Mbufs and Mbuf Clusters are allocated from UMA + * Zones. + * + * Mbuf Clusters (2K, contiguous) are allocated from the Cluster + * Zone. The Zone can be capped at kern.ipc.nmbclusters, if the + * administrator so desires. + * + * Mbufs are allocated from a UMA Master Zone called the Mbuf + * Zone. + * + * Additionally, FreeBSD provides a Packet Zone, which it + * configures as a Secondary Zone to the Mbuf Master Zone, + * thus sharing backend Slab kegs with the Mbuf Master Zone. + * + * Thus common-case allocations and locking are simplified: + * + * m_clget() m_getcl() + * | | + * | .------------>[(Packet Cache)] m_get(), m_gethdr() + * | | [ Packet ] | + * [(Cluster Cache)] [ Secondary ] [ (Mbuf Cache) ] + * [ Cluster Zone ] [ Zone ] [ Mbuf Master Zone ] + * | \________ | + * [ Cluster Keg ] \ / + * | [ Mbuf Keg ] + * [ Cluster Slabs ] | + * | [ Mbuf Slabs ] + * \____________(VM)_________________/ + * + * + * Whenever an object is allocated with uma_zalloc() out of + * one of the Zones its _ctor_ function is executed. The same + * for any deallocation through uma_zfree() the _dtor_ function + * is executed. + * + * Caches are per-CPU and are filled from the Master Zone. + * + * Whenever an object is allocated from the underlying global + * memory pool it gets pre-initialized with the _zinit_ functions. + * When the Keg's are overfull objects get decomissioned with + * _zfini_ functions and free'd back to the global memory pool. + * + */ + +int nmbclusters; /* limits number of mbuf clusters */ +int nmbjumbop; /* limits number of page size jumbo clusters */ +int nmbjumbo9; /* limits number of 9k jumbo clusters */ +int nmbjumbo16; /* limits number of 16k jumbo clusters */ +struct mbstat mbstat; + +/* + * tunable_mbinit() has to be run before init_maxsockets() thus + * the SYSINIT order below is SI_ORDER_MIDDLE while init_maxsockets() + * runs at SI_ORDER_ANY. + */ +static void +tunable_mbinit(void *dummy) +{ + TUNABLE_INT_FETCH("kern.ipc.nmbclusters", &nmbclusters); + + /* This has to be done before VM init. */ + if (nmbclusters == 0) + nmbclusters = 1024 + maxusers * 64; + nmbjumbop = nmbclusters / 2; + nmbjumbo9 = nmbjumbop / 2; + nmbjumbo16 = nmbjumbo9 / 2; +} +SYSINIT(tunable_mbinit, SI_SUB_TUNABLES, SI_ORDER_MIDDLE, tunable_mbinit, NULL); + +static int +sysctl_nmbclusters(SYSCTL_HANDLER_ARGS) +{ + int error, newnmbclusters; + + newnmbclusters = nmbclusters; + error = sysctl_handle_int(oidp, &newnmbclusters, 0, req); + if (error == 0 && req->newptr) { + if (newnmbclusters > nmbclusters) { + nmbclusters = newnmbclusters; + uma_zone_set_max(zone_clust, nmbclusters); +#ifndef __rtems__ + EVENTHANDLER_INVOKE(nmbclusters_change); +#endif + } else + error = EINVAL; + } + return (error); +} +SYSCTL_PROC(_kern_ipc, OID_AUTO, nmbclusters, CTLTYPE_INT|CTLFLAG_RW, +&nmbclusters, 0, sysctl_nmbclusters, "IU", + "Maximum number of mbuf clusters allowed"); + +static int +sysctl_nmbjumbop(SYSCTL_HANDLER_ARGS) +{ + int error, newnmbjumbop; + + newnmbjumbop = nmbjumbop; + error = sysctl_handle_int(oidp, &newnmbjumbop, 0, req); + if (error == 0 && req->newptr) { + if (newnmbjumbop> nmbjumbop) { + nmbjumbop = newnmbjumbop; + uma_zone_set_max(zone_jumbop, nmbjumbop); + } else + error = EINVAL; + } + return (error); +} +SYSCTL_PROC(_kern_ipc, OID_AUTO, nmbjumbop, CTLTYPE_INT|CTLFLAG_RW, +&nmbjumbop, 0, sysctl_nmbjumbop, "IU", + "Maximum number of mbuf page size jumbo clusters allowed"); + + +static int +sysctl_nmbjumbo9(SYSCTL_HANDLER_ARGS) +{ + int error, newnmbjumbo9; + + newnmbjumbo9 = nmbjumbo9; + error = sysctl_handle_int(oidp, &newnmbjumbo9, 0, req); + if (error == 0 && req->newptr) { + if (newnmbjumbo9> nmbjumbo9) { + nmbjumbo9 = newnmbjumbo9; + uma_zone_set_max(zone_jumbo9, nmbjumbo9); + } else + error = EINVAL; + } + return (error); +} +SYSCTL_PROC(_kern_ipc, OID_AUTO, nmbjumbo9, CTLTYPE_INT|CTLFLAG_RW, +&nmbjumbo9, 0, sysctl_nmbjumbo9, "IU", + "Maximum number of mbuf 9k jumbo clusters allowed"); + +static int +sysctl_nmbjumbo16(SYSCTL_HANDLER_ARGS) +{ + int error, newnmbjumbo16; + + newnmbjumbo16 = nmbjumbo16; + error = sysctl_handle_int(oidp, &newnmbjumbo16, 0, req); + if (error == 0 && req->newptr) { + if (newnmbjumbo16> nmbjumbo16) { + nmbjumbo16 = newnmbjumbo16; + uma_zone_set_max(zone_jumbo16, nmbjumbo16); + } else + error = EINVAL; + } + return (error); +} +SYSCTL_PROC(_kern_ipc, OID_AUTO, nmbjumbo16, CTLTYPE_INT|CTLFLAG_RW, +&nmbjumbo16, 0, sysctl_nmbjumbo16, "IU", + "Maximum number of mbuf 16k jumbo clusters allowed"); + + + +SYSCTL_STRUCT(_kern_ipc, OID_AUTO, mbstat, CTLFLAG_RD, &mbstat, mbstat, + "Mbuf general information and statistics"); + +/* + * Zones from which we allocate. + */ +uma_zone_t zone_mbuf; +uma_zone_t zone_clust; +uma_zone_t zone_pack; +uma_zone_t zone_jumbop; +uma_zone_t zone_jumbo9; +uma_zone_t zone_jumbo16; +uma_zone_t zone_ext_refcnt; + +/* + * Local prototypes. + */ +static int mb_ctor_mbuf(void *, int, void *, int); +static int mb_ctor_clust(void *, int, void *, int); +static int mb_ctor_pack(void *, int, void *, int); +static void mb_dtor_mbuf(void *, int, void *); +static void mb_dtor_clust(void *, int, void *); +static void mb_dtor_pack(void *, int, void *); +static int mb_zinit_pack(void *, int, int); +static void mb_zfini_pack(void *, int); + +static void mb_reclaim(void *); +static void mbuf_init(void *); +static void *mbuf_jumbo_alloc(uma_zone_t, int, u_int8_t *, int); + +/* Ensure that MSIZE doesn't break dtom() - it must be a power of 2 */ +CTASSERT((((MSIZE - 1) ^ MSIZE) + 1) >> 1 == MSIZE); + +/* + * Initialize FreeBSD Network buffer allocation. + */ +SYSINIT(mbuf, SI_SUB_MBUF, SI_ORDER_FIRST, mbuf_init, NULL); +static void +mbuf_init(void *dummy) +{ + + /* + * Configure UMA zones for Mbufs, Clusters, and Packets. + */ + zone_mbuf = uma_zcreate(MBUF_MEM_NAME, MSIZE, + mb_ctor_mbuf, mb_dtor_mbuf, +#ifdef INVARIANTS + trash_init, trash_fini, +#else + NULL, NULL, +#endif + MSIZE - 1, UMA_ZONE_MAXBUCKET); + + zone_clust = uma_zcreate(MBUF_CLUSTER_MEM_NAME, MCLBYTES, + mb_ctor_clust, mb_dtor_clust, +#ifdef INVARIANTS + trash_init, trash_fini, +#else + NULL, NULL, +#endif + UMA_ALIGN_PTR, UMA_ZONE_REFCNT); + if (nmbclusters > 0) + uma_zone_set_max(zone_clust, nmbclusters); + + zone_pack = uma_zsecond_create(MBUF_PACKET_MEM_NAME, mb_ctor_pack, + mb_dtor_pack, mb_zinit_pack, mb_zfini_pack, zone_mbuf); + + /* Make jumbo frame zone too. Page size, 9k and 16k. */ + zone_jumbop = uma_zcreate(MBUF_JUMBOP_MEM_NAME, MJUMPAGESIZE, + mb_ctor_clust, mb_dtor_clust, +#ifdef INVARIANTS + trash_init, trash_fini, +#else + NULL, NULL, +#endif + UMA_ALIGN_PTR, UMA_ZONE_REFCNT); + if (nmbjumbop > 0) + uma_zone_set_max(zone_jumbop, nmbjumbop); + + zone_jumbo9 = uma_zcreate(MBUF_JUMBO9_MEM_NAME, MJUM9BYTES, + mb_ctor_clust, mb_dtor_clust, +#ifdef INVARIANTS + trash_init, trash_fini, +#else + NULL, NULL, +#endif + UMA_ALIGN_PTR, UMA_ZONE_REFCNT); + if (nmbjumbo9 > 0) + uma_zone_set_max(zone_jumbo9, nmbjumbo9); + uma_zone_set_allocf(zone_jumbo9, mbuf_jumbo_alloc); + + zone_jumbo16 = uma_zcreate(MBUF_JUMBO16_MEM_NAME, MJUM16BYTES, + mb_ctor_clust, mb_dtor_clust, +#ifdef INVARIANTS + trash_init, trash_fini, +#else + NULL, NULL, +#endif + UMA_ALIGN_PTR, UMA_ZONE_REFCNT); + if (nmbjumbo16 > 0) + uma_zone_set_max(zone_jumbo16, nmbjumbo16); + uma_zone_set_allocf(zone_jumbo16, mbuf_jumbo_alloc); + + zone_ext_refcnt = uma_zcreate(MBUF_EXTREFCNT_MEM_NAME, sizeof(u_int), + NULL, NULL, + NULL, NULL, + UMA_ALIGN_PTR, UMA_ZONE_ZINIT); + + /* uma_prealloc() goes here... */ + + /* + * Hook event handler for low-memory situation, used to + * drain protocols and push data back to the caches (UMA + * later pushes it back to VM). + */ +#ifndef __rtems__ + EVENTHANDLER_REGISTER(vm_lowmem, mb_reclaim, NULL, + EVENTHANDLER_PRI_FIRST); +#endif + + /* + * [Re]set counters and local statistics knobs. + * XXX Some of these should go and be replaced, but UMA stat + * gathering needs to be revised. + */ + mbstat.m_mbufs = 0; + mbstat.m_mclusts = 0; + mbstat.m_drain = 0; + mbstat.m_msize = MSIZE; + mbstat.m_mclbytes = MCLBYTES; + mbstat.m_minclsize = MINCLSIZE; + mbstat.m_mlen = MLEN; + mbstat.m_mhlen = MHLEN; + mbstat.m_numtypes = MT_NTYPES; + + mbstat.m_mcfail = mbstat.m_mpfail = 0; + mbstat.sf_iocnt = 0; + mbstat.sf_allocwait = mbstat.sf_allocfail = 0; +} + +/* + * UMA backend page allocator for the jumbo frame zones. + * + * Allocates kernel virtual memory that is backed by contiguous physical + * pages. + */ +static void * +mbuf_jumbo_alloc(uma_zone_t zone, int bytes, u_int8_t *flags, int wait) +{ + + /* Inform UMA that this allocator uses kernel_map/object. */ + *flags = UMA_SLAB_KERNEL; +#ifndef __rtems__ + return ((void *)kmem_alloc_contig(kernel_map, bytes, wait, + (vm_paddr_t)0, ~(vm_paddr_t)0, 1, 0, VM_MEMATTR_DEFAULT)); +#else + return ((void *)malloc(bytes, M_TEMP, wait)); +#endif +} + +/* + * Constructor for Mbuf master zone. + * + * The 'arg' pointer points to a mb_args structure which + * contains call-specific information required to support the + * mbuf allocation API. See mbuf.h. + */ +static int +mb_ctor_mbuf(void *mem, int size, void *arg, int how) +{ + struct mbuf *m; + struct mb_args *args; +#ifdef MAC + int error; +#endif + int flags; + short type; + +#ifdef INVARIANTS + trash_ctor(mem, size, arg, how); +#endif + m = (struct mbuf *)mem; + args = (struct mb_args *)arg; + flags = args->flags; + type = args->type; + + /* + * The mbuf is initialized later. The caller has the + * responsibility to set up any MAC labels too. + */ + if (type == MT_NOINIT) + return (0); + + m->m_next = NULL; + m->m_nextpkt = NULL; + m->m_len = 0; + m->m_flags = flags; + m->m_type = type; + if (flags & M_PKTHDR) { + m->m_data = m->m_pktdat; + m->m_pkthdr.rcvif = NULL; + m->m_pkthdr.header = NULL; + m->m_pkthdr.len = 0; + m->m_pkthdr.csum_flags = 0; + m->m_pkthdr.csum_data = 0; + m->m_pkthdr.tso_segsz = 0; + m->m_pkthdr.ether_vtag = 0; + m->m_pkthdr.flowid = 0; + SLIST_INIT(&m->m_pkthdr.tags); +#ifdef MAC + /* If the label init fails, fail the alloc */ + error = mac_mbuf_init(m, how); + if (error) + return (error); +#endif + } else + m->m_data = m->m_dat; + return (0); +} + +/* + * The Mbuf master zone destructor. + */ +static void +mb_dtor_mbuf(void *mem, int size, void *arg) +{ + struct mbuf *m; + unsigned long flags; + + m = (struct mbuf *)mem; + flags = (unsigned long)arg; + + if ((flags & MB_NOTAGS) == 0 && (m->m_flags & M_PKTHDR) != 0) + m_tag_delete_chain(m, NULL); + KASSERT((m->m_flags & M_EXT) == 0, ("%s: M_EXT set", __func__)); + KASSERT((m->m_flags & M_NOFREE) == 0, ("%s: M_NOFREE set", __func__)); +#ifdef INVARIANTS + trash_dtor(mem, size, arg); +#endif +} + +/* + * The Mbuf Packet zone destructor. + */ +static void +mb_dtor_pack(void *mem, int size, void *arg) +{ + struct mbuf *m; + + m = (struct mbuf *)mem; + if ((m->m_flags & M_PKTHDR) != 0) + m_tag_delete_chain(m, NULL); + + /* Make sure we've got a clean cluster back. */ + KASSERT((m->m_flags & M_EXT) == M_EXT, ("%s: M_EXT not set", __func__)); + KASSERT(m->m_ext.ext_buf != NULL, ("%s: ext_buf == NULL", __func__)); + KASSERT(m->m_ext.ext_free == NULL, ("%s: ext_free != NULL", __func__)); + KASSERT(m->m_ext.ext_arg1 == NULL, ("%s: ext_arg1 != NULL", __func__)); + KASSERT(m->m_ext.ext_arg2 == NULL, ("%s: ext_arg2 != NULL", __func__)); + KASSERT(m->m_ext.ext_size == MCLBYTES, ("%s: ext_size != MCLBYTES", __func__)); + KASSERT(m->m_ext.ext_type == EXT_PACKET, ("%s: ext_type != EXT_PACKET", __func__)); + KASSERT(*m->m_ext.ref_cnt == 1, ("%s: ref_cnt != 1", __func__)); +#ifdef INVARIANTS + trash_dtor(m->m_ext.ext_buf, MCLBYTES, arg); +#endif + /* + * If there are processes blocked on zone_clust, waiting for pages + * to be freed up, * cause them to be woken up by draining the + * packet zone. We are exposed to a race here * (in the check for + * the UMA_ZFLAG_FULL) where we might miss the flag set, but that + * is deliberate. We don't want to acquire the zone lock for every + * mbuf free. + */ + if (uma_zone_exhausted_nolock(zone_clust)) + zone_drain(zone_pack); +} + +/* + * The Cluster and Jumbo[PAGESIZE|9|16] zone constructor. + * + * Here the 'arg' pointer points to the Mbuf which we + * are configuring cluster storage for. If 'arg' is + * empty we allocate just the cluster without setting + * the mbuf to it. See mbuf.h. + */ +static int +mb_ctor_clust(void *mem, int size, void *arg, int how) +{ + struct mbuf *m; + u_int *refcnt; + int type; + uma_zone_t zone; + +#ifdef INVARIANTS + trash_ctor(mem, size, arg, how); +#endif + switch (size) { + case MCLBYTES: + type = EXT_CLUSTER; + zone = zone_clust; + break; +#if MJUMPAGESIZE != MCLBYTES + case MJUMPAGESIZE: + type = EXT_JUMBOP; + zone = zone_jumbop; + break; +#endif + case MJUM9BYTES: + type = EXT_JUMBO9; + zone = zone_jumbo9; + break; + case MJUM16BYTES: + type = EXT_JUMBO16; + zone = zone_jumbo16; + break; + default: + panic("unknown cluster size"); + break; + } + + m = (struct mbuf *)arg; + refcnt = uma_find_refcnt(zone, mem); + *refcnt = 1; + if (m != NULL) { + m->m_ext.ext_buf = (caddr_t)mem; + m->m_data = m->m_ext.ext_buf; + m->m_flags |= M_EXT; + m->m_ext.ext_free = NULL; + m->m_ext.ext_arg1 = NULL; + m->m_ext.ext_arg2 = NULL; + m->m_ext.ext_size = size; + m->m_ext.ext_type = type; + m->m_ext.ref_cnt = refcnt; + } + + return (0); +} + +/* + * The Mbuf Cluster zone destructor. + */ +static void +mb_dtor_clust(void *mem, int size, void *arg) +{ +#ifdef INVARIANTS + uma_zone_t zone; + + zone = m_getzone(size); + KASSERT(*(uma_find_refcnt(zone, mem)) <= 1, + ("%s: refcnt incorrect %u", __func__, + *(uma_find_refcnt(zone, mem))) ); + + trash_dtor(mem, size, arg); +#endif +} + +/* + * The Packet secondary zone's init routine, executed on the + * object's transition from mbuf keg slab to zone cache. + */ +static int +mb_zinit_pack(void *mem, int size, int how) +{ + struct mbuf *m; + + m = (struct mbuf *)mem; /* m is virgin. */ + if (uma_zalloc_arg(zone_clust, m, how) == NULL || + m->m_ext.ext_buf == NULL) + return (ENOMEM); + m->m_ext.ext_type = EXT_PACKET; /* Override. */ +#ifdef INVARIANTS + trash_init(m->m_ext.ext_buf, MCLBYTES, how); +#endif + return (0); +} + +/* + * The Packet secondary zone's fini routine, executed on the + * object's transition from zone cache to keg slab. + */ +static void +mb_zfini_pack(void *mem, int size) +{ + struct mbuf *m; + + m = (struct mbuf *)mem; +#ifdef INVARIANTS + trash_fini(m->m_ext.ext_buf, MCLBYTES); +#endif + uma_zfree_arg(zone_clust, m->m_ext.ext_buf, NULL); +#ifdef INVARIANTS + trash_dtor(mem, size, NULL); +#endif +} + +/* + * The "packet" keg constructor. + */ +static int +mb_ctor_pack(void *mem, int size, void *arg, int how) +{ + struct mbuf *m; + struct mb_args *args; +#ifdef MAC + int error; +#endif + int flags; + short type; + + m = (struct mbuf *)mem; + args = (struct mb_args *)arg; + flags = args->flags; + type = args->type; + +#ifdef INVARIANTS + trash_ctor(m->m_ext.ext_buf, MCLBYTES, arg, how); +#endif + m->m_next = NULL; + m->m_nextpkt = NULL; + m->m_data = m->m_ext.ext_buf; + m->m_len = 0; + m->m_flags = (flags | M_EXT); + m->m_type = type; + + if (flags & M_PKTHDR) { + m->m_pkthdr.rcvif = NULL; + m->m_pkthdr.len = 0; + m->m_pkthdr.header = NULL; + m->m_pkthdr.csum_flags = 0; + m->m_pkthdr.csum_data = 0; + m->m_pkthdr.tso_segsz = 0; + m->m_pkthdr.ether_vtag = 0; + m->m_pkthdr.flowid = 0; + SLIST_INIT(&m->m_pkthdr.tags); +#ifdef MAC + /* If the label init fails, fail the alloc */ + error = mac_mbuf_init(m, how); + if (error) + return (error); +#endif + } + /* m_ext is already initialized. */ + + return (0); +} + +int +m_pkthdr_init(struct mbuf *m, int how) +{ +#ifdef MAC + int error; +#endif + m->m_data = m->m_pktdat; + SLIST_INIT(&m->m_pkthdr.tags); + m->m_pkthdr.rcvif = NULL; + m->m_pkthdr.header = NULL; + m->m_pkthdr.len = 0; + m->m_pkthdr.flowid = 0; + m->m_pkthdr.csum_flags = 0; + m->m_pkthdr.csum_data = 0; + m->m_pkthdr.tso_segsz = 0; + m->m_pkthdr.ether_vtag = 0; +#ifdef MAC + /* If the label init fails, fail the alloc */ + error = mac_mbuf_init(m, how); + if (error) + return (error); +#endif + + return (0); +} + +/* + * This is the protocol drain routine. + * + * No locks should be held when this is called. The drain routines have to + * presently acquire some locks which raises the possibility of lock order + * reversal. + */ +static void +mb_reclaim(void *junk) +{ + struct domain *dp; + struct protosw *pr; + + WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK | WARN_PANIC, NULL, + "mb_reclaim()"); + + for (dp = domains; dp != NULL; dp = dp->dom_next) + for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) + if (pr->pr_drain != NULL) + (*pr->pr_drain)(); +} -- cgit v1.2.3