diff options
author | fenner <fenner@FreeBSD.org> | 1999-01-18 02:06:59 +0000 |
---|---|---|
committer | fenner <fenner@FreeBSD.org> | 1999-01-18 02:06:59 +0000 |
commit | c9e9dccbb7e008df4c1d1904f54554e6220f0616 (patch) | |
tree | 48cd7336425d82ac58905563ccc1b69e56252f3b /sys/netinet/ip_mroute.c | |
parent | 331c793e6579b70b11e5fc3881c8aba6bd917ebb (diff) | |
download | FreeBSD-src-c9e9dccbb7e008df4c1d1904f54554e6220f0616.zip FreeBSD-src-c9e9dccbb7e008df4c1d1904f54554e6220f0616.tar.gz |
Use dynamic memory allocation instead of mbuf's for multicast routing
state.
Note: this requires a recompilation of netstat (but netstat has been
broken since rev 1.52 of ip_mroute.c anyway)
Obtained from: Significantly based on Steve McCanne's
<mccanne@cs.berkeley.edu> work for BSD/OS
Diffstat (limited to 'sys/netinet/ip_mroute.c')
-rw-r--r-- | sys/netinet/ip_mroute.c | 184 |
1 files changed, 82 insertions, 102 deletions
diff --git a/sys/netinet/ip_mroute.c b/sys/netinet/ip_mroute.c index ebc7a6e..65bfecf 100644 --- a/sys/netinet/ip_mroute.c +++ b/sys/netinet/ip_mroute.c @@ -9,13 +9,14 @@ * Modified by Bill Fenner, PARC, April 1995 * * MROUTING Revision: 3.5 - * $Id: ip_mroute.c,v 1.51 1998/12/16 18:07:11 fenner Exp $ + * $Id: ip_mroute.c,v 1.52 1999/01/12 12:16:50 eivind Exp $ */ #include "opt_mrouting.h" #include <sys/param.h> #include <sys/systm.h> +#include <sys/malloc.h> #include <sys/mbuf.h> #include <sys/socket.h> #include <sys/socketvar.h> @@ -185,7 +186,7 @@ ip_rsvp_force_done(so) #define same(a1, a2) \ (bcmp((caddr_t)(a1), (caddr_t)(a2), INSIZ) == 0) -#define MT_MRTABLE MT_RTABLE /* since nothing else uses it */ +static MALLOC_DEFINE(M_MRTABLE, "mroutetbl", "multicast routing tables"); /* * Globals. All but ip_mrouter and ip_mrtproto could be static, @@ -203,7 +204,7 @@ static int ip_mrtproto; #define NO_RTE_FOUND 0x1 #define RTE_FOUND 0x2 -static struct mbuf *mfctable[MFCTBLSIZ]; +static struct mfc *mfctable[MFCTBLSIZ]; static u_char nexpire[MFCTBLSIZ]; static struct vif viftable[MAXVIFS]; static u_int mrtdebug = 0; /* debug level */ @@ -321,19 +322,17 @@ static int pim_assert; */ #define MFCFIND(o, g, rt) { \ - register struct mbuf *_mb_rt = mfctable[MFCHASH(o,g)]; \ - register struct mfc *_rt = NULL; \ + register struct mfc *_rt = mfctable[MFCHASH(o,g)]; \ rt = NULL; \ ++mrtstat.mrts_mfc_lookups; \ - while (_mb_rt) { \ - _rt = mtod(_mb_rt, struct mfc *); \ + while (_rt) { \ if ((_rt->mfc_origin.s_addr == o) && \ (_rt->mfc_mcastgrp.s_addr == g) && \ - (_mb_rt->m_act == NULL)) { \ + (_rt->mfc_stall == NULL)) { \ rt = _rt; \ break; \ } \ - _mb_rt = _mb_rt->m_next; \ + _rt = _rt->mfc_next; \ } \ if (rt == NULL) { \ ++mrtstat.mrts_mfc_misses; \ @@ -591,8 +590,7 @@ X_ip_mrouter_done() int i; struct ifnet *ifp; struct ifreq ifr; - struct mbuf *mb_rt; - struct mbuf *m; + struct mfc *rt; struct rtdetq *rte; int s; @@ -623,18 +621,18 @@ X_ip_mrouter_done() * Free all multicast forwarding cache entries. */ for (i = 0; i < MFCTBLSIZ; i++) { - mb_rt = mfctable[i]; - while (mb_rt) { - if (mb_rt->m_act != NULL) { - while (mb_rt->m_act) { - m = mb_rt->m_act; - mb_rt->m_act = m->m_act; - rte = mtod(m, struct rtdetq *); - m_freem(rte->m); - m_free(m); - } + for (rt = mfctable[i]; rt != NULL; ) { + struct mfc *nr = rt->mfc_next; + + for (rte = rt->mfc_stall; rte != NULL; ) { + struct rtdetq *n = rte->next; + + m_freem(rte->m); + free(rte, M_MRTABLE); + rte = n; } - mb_rt = m_free(mb_rt); + free(rt, M_MRTABLE); + rt = nr; } } @@ -840,9 +838,7 @@ add_mfc(mfccp) struct mfcctl *mfccp; { struct mfc *rt; - register struct mbuf *mb_rt; u_long hash; - struct mbuf *mb_ntry; struct rtdetq *rte; register u_short nstl; int s; @@ -871,25 +867,24 @@ add_mfc(mfccp) */ s = splnet(); hash = MFCHASH(mfccp->mfcc_origin.s_addr, mfccp->mfcc_mcastgrp.s_addr); - for (mb_rt = mfctable[hash], nstl = 0; mb_rt; mb_rt = mb_rt->m_next) { + for (rt = mfctable[hash], nstl = 0; rt; rt = rt->mfc_next) { - rt = mtod(mb_rt, struct mfc *); if ((rt->mfc_origin.s_addr == mfccp->mfcc_origin.s_addr) && (rt->mfc_mcastgrp.s_addr == mfccp->mfcc_mcastgrp.s_addr) && - (mb_rt->m_act != NULL)) { + (rt->mfc_stall != NULL)) { if (nstl++) log(LOG_ERR, "add_mfc %s o %lx g %lx p %x dbx %p\n", "multiple kernel entries", (u_long)ntohl(mfccp->mfcc_origin.s_addr), (u_long)ntohl(mfccp->mfcc_mcastgrp.s_addr), - mfccp->mfcc_parent, (void *)mb_rt->m_act); + mfccp->mfcc_parent, (void *)rt->mfc_stall); if (mrtdebug & DEBUG_MFC) log(LOG_DEBUG,"add_mfc o %lx g %lx p %x dbg %p\n", (u_long)ntohl(mfccp->mfcc_origin.s_addr), (u_long)ntohl(mfccp->mfcc_mcastgrp.s_addr), - mfccp->mfcc_parent, (void *)mb_rt->m_act); + mfccp->mfcc_parent, (void *)rt->mfc_stall); rt->mfc_origin = mfccp->mfcc_origin; rt->mfc_mcastgrp = mfccp->mfcc_mcastgrp; @@ -906,19 +901,18 @@ add_mfc(mfccp) nexpire[hash]--; /* free packets Qed at the end of this entry */ - while (mb_rt->m_act) { - mb_ntry = mb_rt->m_act; - rte = mtod(mb_ntry, struct rtdetq *); -/* #ifdef RSVP_ISI */ + for (rte = rt->mfc_stall; rte != NULL; ) { + struct rtdetq *n = rte->next; + ip_mdq(rte->m, rte->ifp, rt, -1); -/* #endif */ - mb_rt->m_act = mb_ntry->m_act; m_freem(rte->m); #ifdef UPCALL_TIMING collate(&(rte->t)); #endif /* UPCALL_TIMING */ - m_free(mb_ntry); + free(rte, M_MRTABLE); + rte = n; } + rt->mfc_stall = NULL; } } @@ -932,9 +926,8 @@ add_mfc(mfccp) (u_long)ntohl(mfccp->mfcc_mcastgrp.s_addr), mfccp->mfcc_parent); - for (mb_rt = mfctable[hash]; mb_rt; mb_rt = mb_rt->m_next) { + for (rt = mfctable[hash]; rt != NULL; rt = rt->mfc_next) { - rt = mtod(mb_rt, struct mfc *); if ((rt->mfc_origin.s_addr == mfccp->mfcc_origin.s_addr) && (rt->mfc_mcastgrp.s_addr == mfccp->mfcc_mcastgrp.s_addr)) { @@ -953,16 +946,14 @@ add_mfc(mfccp) rt->mfc_expire = 0; } } - if (mb_rt == NULL) { + if (rt == NULL) { /* no upcall, so make a new entry */ - MGET(mb_rt, M_DONTWAIT, MT_MRTABLE); - if (mb_rt == NULL) { + rt = (struct mfc *)malloc(sizeof(*rt), M_MRTABLE, M_NOWAIT); + if (rt == NULL) { splx(s); return ENOBUFS; } - rt = mtod(mb_rt, struct mfc *); - /* insert new entry at head of hash chain */ rt->mfc_origin = mfccp->mfcc_origin; rt->mfc_mcastgrp = mfccp->mfcc_mcastgrp; @@ -975,11 +966,11 @@ add_mfc(mfccp) rt->mfc_wrong_if = 0; rt->mfc_last_assert.tv_sec = rt->mfc_last_assert.tv_usec = 0; rt->mfc_expire = 0; + rt->mfc_stall = NULL; /* link into table */ - mb_rt->m_next = mfctable[hash]; - mfctable[hash] = mb_rt; - mb_rt->m_act = NULL; + rt->mfc_next = mfctable[hash]; + mfctable[hash] = rt; } } splx(s); @@ -1022,8 +1013,7 @@ del_mfc(mfccp) struct in_addr origin; struct in_addr mcastgrp; struct mfc *rt; - struct mbuf *mb_rt; - struct mbuf **nptr; + struct mfc **nptr; u_long hash; int s; @@ -1038,21 +1028,21 @@ del_mfc(mfccp) s = splnet(); nptr = &mfctable[hash]; - while ((mb_rt = *nptr) != NULL) { - rt = mtod(mb_rt, struct mfc *); + while ((rt = *nptr) != NULL) { if (origin.s_addr == rt->mfc_origin.s_addr && mcastgrp.s_addr == rt->mfc_mcastgrp.s_addr && - mb_rt->m_act == NULL) + rt->mfc_stall == NULL) break; - nptr = &mb_rt->m_next; + nptr = &rt->mfc_next; } - if (mb_rt == NULL) { + if (rt == NULL) { splx(s); return EADDRNOTAVAIL; } - MFREE(mb_rt, *nptr); + *nptr = rt->mfc_next; + free(rt, M_MRTABLE); splx(s); @@ -1178,13 +1168,9 @@ X_ip_mforward(ip, ifp, m, imo) * send message to routing daemon */ - register struct mbuf *mb_rt; - register struct mbuf *mb_ntry; register struct mbuf *mb0; register struct rtdetq *rte; - register struct mbuf *rte_m; register u_long hash; - register int npkts; int hlen = ip->ip_hl << 2; #ifdef UPCALL_TIMING struct timeval tp; @@ -1203,8 +1189,8 @@ X_ip_mforward(ip, ifp, m, imo) * just going to fail anyway. Make sure to pullup the header so * that other people can't step on it. */ - MGET(mb_ntry, M_DONTWAIT, MT_DATA); - if (mb_ntry == NULL) { + rte = (struct rtdetq *)malloc((sizeof *rte), M_MRTABLE, M_NOWAIT); + if (rte == NULL) { splx(s); return ENOBUFS; } @@ -1212,29 +1198,28 @@ X_ip_mforward(ip, ifp, m, imo) if (mb0 && (M_HASCL(mb0) || mb0->m_len < hlen)) mb0 = m_pullup(mb0, hlen); if (mb0 == NULL) { - m_free(mb_ntry); + free(rte, M_MRTABLE); splx(s); return ENOBUFS; } /* is there an upcall waiting for this packet? */ hash = MFCHASH(ip->ip_src.s_addr, ip->ip_dst.s_addr); - for (mb_rt = mfctable[hash]; mb_rt; mb_rt = mb_rt->m_next) { - rt = mtod(mb_rt, struct mfc *); + for (rt = mfctable[hash]; rt; rt = rt->mfc_next) { if ((ip->ip_src.s_addr == rt->mfc_origin.s_addr) && (ip->ip_dst.s_addr == rt->mfc_mcastgrp.s_addr) && - (mb_rt->m_act != NULL)) + (rt->mfc_stall != NULL)) break; } - if (mb_rt == NULL) { + if (rt == NULL) { int i; struct igmpmsg *im; /* no upcall, so make a new entry */ - MGET(mb_rt, M_DONTWAIT, MT_MRTABLE); - if (mb_rt == NULL) { - m_free(mb_ntry); + rt = (struct mfc *)malloc(sizeof(*rt), M_MRTABLE, M_NOWAIT); + if (rt == NULL) { + free(rte, M_MRTABLE); m_freem(mb0); splx(s); return ENOBUFS; @@ -1242,9 +1227,9 @@ X_ip_mforward(ip, ifp, m, imo) /* Make a copy of the header to send to the user level process */ mm = m_copy(mb0, 0, hlen); if (mm == NULL) { - m_free(mb_ntry); + free(rte, M_MRTABLE); m_freem(mb0); - m_free(mb_rt); + free(rt, M_MRTABLE); splx(s); return ENOBUFS; } @@ -1264,15 +1249,13 @@ X_ip_mforward(ip, ifp, m, imo) if (socket_send(ip_mrouter, mm, &k_igmpsrc) < 0) { log(LOG_WARNING, "ip_mforward: ip_mrouter socket queue full\n"); ++mrtstat.mrts_upq_sockfull; - m_free(mb_ntry); + free(rte, M_MRTABLE); m_freem(mb0); - m_free(mb_rt); + free(rt, M_MRTABLE); splx(s); return ENOBUFS; } - rt = mtod(mb_rt, struct mfc *); - /* insert new entry at head of hash chain */ rt->mfc_origin.s_addr = ip->ip_src.s_addr; rt->mfc_mcastgrp.s_addr = ip->ip_dst.s_addr; @@ -1283,36 +1266,36 @@ X_ip_mforward(ip, ifp, m, imo) rt->mfc_parent = -1; /* link into table */ - mb_rt->m_next = mfctable[hash]; - mfctable[hash] = mb_rt; - mb_rt->m_act = NULL; + rt->mfc_next = mfctable[hash]; + mfctable[hash] = rt; + rt->mfc_stall = rte; - rte_m = mb_rt; } else { /* determine if q has overflowed */ - for (rte_m = mb_rt, npkts = 0; rte_m->m_act; rte_m = rte_m->m_act) + int npkts = 0; + struct rtdetq **p; + + for (p = &rt->mfc_stall; *p != NULL; p = &(*p)->next) npkts++; if (npkts > MAX_UPQ) { mrtstat.mrts_upq_ovflw++; - m_free(mb_ntry); + free(rte, M_MRTABLE); m_freem(mb0); splx(s); return 0; } - } - mb_ntry->m_act = NULL; - rte = mtod(mb_ntry, struct rtdetq *); + /* Add this entry to the end of the queue */ + *p = rte; + } rte->m = mb0; rte->ifp = ifp; #ifdef UPCALL_TIMING rte->t = tp; #endif - - /* Add this entry to the end of the queue */ - rte_m->m_act = mb_ntry; + rte->next = NULL; splx(s); @@ -1331,9 +1314,8 @@ int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *, static void expire_upcalls(void *unused) { - struct mbuf *mb_rt, *m, **nptr; struct rtdetq *rte; - struct mfc *mfc; + struct mfc *mfc, **nptr; int i; int s; @@ -1342,15 +1324,13 @@ expire_upcalls(void *unused) if (nexpire[i] == 0) continue; nptr = &mfctable[i]; - for (mb_rt = *nptr; mb_rt != NULL; mb_rt = *nptr) { - mfc = mtod(mb_rt, struct mfc *); - + for (mfc = *nptr; mfc != NULL; mfc = *nptr) { /* * Skip real cache entries * Make sure it wasn't marked to not expire (shouldn't happen) * If it expires now */ - if (mb_rt->m_act != NULL && + if (mfc->mfc_stall != NULL && mfc->mfc_expire != 0 && --mfc->mfc_expire == 0) { if (mrtdebug & DEBUG_EXPIRE) @@ -1361,20 +1341,20 @@ expire_upcalls(void *unused) * drop all the packets * free the mbuf with the pkt, if, timing info */ - while (mb_rt->m_act) { - m = mb_rt->m_act; - mb_rt->m_act = m->m_act; - - rte = mtod(m, struct rtdetq *); + for (rte = mfc->mfc_stall; rte; ) { + struct rtdetq *n = rte->next; + m_freem(rte->m); - m_free(m); + free(rte, M_MRTABLE); + rte = n; } ++mrtstat.mrts_cache_cleanups; nexpire[i]--; - MFREE(mb_rt, *nptr); + *nptr = mfc->mfc_next; + free(mfc, M_MRTABLE); } else { - nptr = &mb_rt->m_next; + nptr = &mfc->mfc_next; } } } @@ -1555,7 +1535,7 @@ phyint_send(ip, vifp, m) if (mb_copy == NULL) return; - if (vifp->v_rate_limit <= 0) + if (vifp->v_rate_limit == 0) tbf_send_packet(vifp, mb_copy); else tbf_control(vifp, mb_copy, mtod(mb_copy, struct ip *), ip->ip_len); @@ -1616,7 +1596,7 @@ encap_send(ip, vifp, m) ip->ip_sum = in_cksum(mb_copy, ip->ip_hl << 2); mb_copy->m_data -= sizeof(multicast_encap_iphdr); - if (vifp->v_rate_limit <= 0) + if (vifp->v_rate_limit == 0) tbf_send_packet(vifp, mb_copy); else tbf_control(vifp, mb_copy, ip, ip_copy->ip_len); |