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a5c4836d39
that should be better. The old code counted references to mbuf clusters by using the offset of the cluster from the start of memory allocated for mbufs and clusters as an index into an array of chars, which did the reference counting. If the external storage was not a cluster then reference counting had to be done by the code using that external storage. NetBSD's system of linked lists of mbufs was cosidered, but Alfred felt it would have locking issues when the kernel was made more SMP friendly. The system implimented uses a pool of unions to track external storage. The union contains an int for counting the references and a pointer for forming a free list. The reference counts are incremented and decremented atomically and so should be SMP friendly. This system can track reference counts for any sort of external storage. Access to the reference counting stuff is now through macros defined in mbuf.h, so it should be easier to make changes to the system in the future. The possibility of storing the reference count in one of the referencing mbufs was considered, but was rejected 'cos it would often leave extra mbufs allocated. Storing the reference count in the cluster was also considered, but because the external storage may not be a cluster this isn't an option. The size of the pool of reference counters is available in the stats provided by "netstat -m". PR: 19866 Submitted by: Bosko Milekic <bmilekic@dsuper.net> Reviewed by: alfred (glanced at by others on -net) |
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| .. | ||
| ah6.h | ||
| ah_core.c | ||
| ah_input.c | ||
| ah_output.c | ||
| ah.h | ||
| dest6.c | ||
| esp6.h | ||
| esp_core.c | ||
| esp_input.c | ||
| esp_output.c | ||
| esp.h | ||
| frag6.c | ||
| icmp6.c | ||
| icmp6.h | ||
| in6_cksum.c | ||
| in6_gif.c | ||
| in6_gif.h | ||
| in6_ifattach.c | ||
| in6_ifattach.h | ||
| in6_pcb.c | ||
| in6_pcb.h | ||
| in6_prefix.c | ||
| in6_prefix.h | ||
| in6_proto.c | ||
| in6_rmx.c | ||
| in6_src.c | ||
| in6_var.h | ||
| in6.c | ||
| in6.h | ||
| ip6_ecn.h | ||
| ip6_forward.c | ||
| ip6_fw.c | ||
| ip6_fw.h | ||
| ip6_input.c | ||
| ip6_mroute.c | ||
| ip6_mroute.h | ||
| ip6_output.c | ||
| ip6_var.h | ||
| ip6.h | ||
| ip6protosw.h | ||
| ipcomp6.h | ||
| ipcomp_core.c | ||
| ipcomp_input.c | ||
| ipcomp_output.c | ||
| ipcomp.h | ||
| ipsec6.h | ||
| ipsec.c | ||
| ipsec.h | ||
| mld6_var.h | ||
| mld6.c | ||
| nd6_nbr.c | ||
| nd6_rtr.c | ||
| nd6.c | ||
| nd6.h | ||
| pim6_var.h | ||
| pim6.h | ||
| raw_ip6.c | ||
| README | ||
| route6.c | ||
| scope6_var.h | ||
| scope6.c | ||
| tcp6_var.h | ||
| udp6_output.c | ||
| udp6_usrreq.c | ||
| udp6_var.h | ||
a note to committers about KAME tree $FreeBSD$ KAME project FreeBSD IPv6/IPsec tree is from KAMEproject (http://www.kame.net/). To synchronize KAME tree and FreeBSD better today and in the future, please understand the following: - DO NOT MAKE COSTMETIC CHANGES. "Cosmetic changes" here includes tabify, untabify, removal of space at EOL, minor KNF items, and whatever adds more output lines on "diff freebsd kame". To make future synchronization easier. it is critical to preserve certain statements in the code. Also, as KAME tree supports all 4 BSDs (Free, Open, Net, BSD/OS) in single shared tree, it is not always possible to backport FreeBSD changes into KAME tree. So again, please do not make cosmetic changes. Even if you think it a right thing, that will bite KAME guys badly during upgrade attempts, and prevent us from synchronizing two trees. (you don't usually make cosmetic changes against third-party code, do you?) - REPORT CHANGES/BUGS TO KAME GUYS. It is not always possible for KAME guys to watch all the freebsd mailing list traffic, as the traffic is HUGE. So if possible, please, inform kame guys of changes you made in IPv6/IPsec related portion. Contact path would be snap-users@kame.net or KAME PR database on www.kame.net. (or to core@kame.net if it is necessary to make it confidential) Thank you for your cooperation and have a happy IPv6 life! Note: KAME-origin code is in the following locations. The above notice applies to corresponding manpages too. The list may not be complete. If you see $KAME$ in the code, it is from KAME distribution. If you see some file that is IPv6/IPsec related, it is highly possible that the file is from KAME distribution. include/ifaddrs.h lib/libc/net lib/libc/net/getaddrinfo.c lib/libc/net/getifaddrs.c lib/libc/net/getnameinfo.c lib/libc/net/ifname.c lib/libc/net/ip6opt.c lib/libc/net/map_v4v6.c lib/libc/net/name6.c lib/libftpio lib/libipsec sbin/ip6fw sbin/ping6 sbin/rtsol share/doc/IPv6 share/man/man4/ip6.4 share/man/man4/inet6.4 sys/crypto (except sys/crypto/rc4) sys/kern/uipc_mbuf2.c sys/net/if_faith.[ch] sys/net/if_gif.[ch] sys/net/if_stf.[ch] sys/net/pfkeyv2.h sys/netinet/icmp6.h sys/netinet/in_gif.[ch] sys/netinet/ip6.h sys/netinet/ip_encap.[ch] sys/netinet6 sys/netkey usr.sbin/faithd usr.sbin/gifconfig usr.sbin/ifmcstat usr.sbin/mld6query usr.sbin/ndp usr.sbin/pim6dd usr.sbin/pim6sd usr.sbin/prefix usr.sbin/rip6query usr.sbin/route6d usr.sbin/rrenumd usr.sbin/rtadvd usr.sbin/rtsold usr.sbin/scope6config usr.sbin/setkey usr.sbin/traceroute6