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Wei Dong dafee49085 [IPV6]: SNMPv2 "ipv6IfStatsOutFragCreates" counter error 
When I tested linux kernel 2.6.71.7 about statistics
"ipv6IfStatsOutFragCreates", and found that it couldn't increase
correctly. The criteria is RFC 2465:

  ipv6IfStatsOutFragCreates OBJECT-TYPE
      SYNTAX      Counter32
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "The number of output datagram fragments that have
         been generated as a result of fragmentation at
         this output interface."
      ::= { ipv6IfStatsEntry 15 }

I think there are two issues in Linux kernel. 
1st:
RFC2465 specifies the counter is "The number of output datagram
fragments...". I think increasing this counter after output a fragment
successfully is better. And it should not be increased even though a
fragment is created but failed to output.

2nd:
If we send a big ICMP/ICMPv6 echo request to a host, and receive
ICMP/ICMPv6 echo reply consisted of some fragments. As we know that in
Linux kernel first fragmentation occurs in ICMP layer(maybe saying
transport layer is better), but this is not the "real"
fragmentation,just do some "pre-fragment" -- allocate space for date,
and form a frag_list, etc. The "real" fragmentation happens in IP layer
-- set offset and MF flag and so on. So I think in "fast path" for
ip_fragment/ip6_fragment, if we send a fragment which "pre-fragment" by
upper layer we should also increase "ipv6IfStatsOutFragCreates".

Signed-off-by: Wei Dong <weid@nanjing-fnst.com>
Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-08-02 13:41:21 -07:00
..
ipvs [NET]: Conversions from kmalloc+memset to k(z|c)alloc. 2006-07-21 14:51:30 -07:00
netfilter [NETFILTER]: xt_hashlimit/xt_string: missing string validation 2006-08-02 13:38:29 -07:00
af_inet.c [NET] gso: Fix up GSO packets with broken checksums 2006-07-08 13:34:56 -07:00
ah4.c [NET]: Conversions from kmalloc+memset to k(z|c)alloc. 2006-07-21 14:51:30 -07:00
arp.c [NET]: Conversions from kmalloc+memset to k(z|c)alloc. 2006-07-21 14:51:30 -07:00
datagram.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
devinet.c [NET]: Conversions from kmalloc+memset to k(z|c)alloc. 2006-07-21 14:51:30 -07:00
esp4.c [NET]: Conversions from kmalloc+memset to k(z|c)alloc. 2006-07-21 14:51:30 -07:00
fib_frontend.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
fib_hash.c [NET]: Conversions from kmalloc+memset to k(z|c)alloc. 2006-07-21 14:51:30 -07:00
fib_lookup.h [IPV4]: Prepare FIB core for RCU. 2005-08-29 16:08:31 -07:00
fib_rules.c [NET]: Conversions from kmalloc+memset to k(z|c)alloc. 2006-07-21 14:51:30 -07:00
fib_semantics.c [IPV4]: Fix nexthop realm dumping for multipath routes 2006-07-21 15:09:55 -07:00
fib_trie.c [IPV4]: Fix error handling for fib_insert_node call 2006-07-12 13:59:04 -07:00
icmp.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
igmp.c [NET]: Conversions from kmalloc+memset to k(z|c)alloc. 2006-07-21 14:51:30 -07:00
inet_connection_sock.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
inet_diag.c [NET]: Conversions from kmalloc+memset to k(z|c)alloc. 2006-07-21 14:51:30 -07:00
inet_hashtables.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
inet_timewait_sock.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
inetpeer.c [IPV4] inetpeer: Get rid of volatile from peer_total 2006-07-10 14:50:30 -07:00
ip_forward.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
ip_fragment.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
ip_gre.c [IPV4]: Get rid of redundant IPCB->opts initialisation 2006-07-21 14:29:53 -07:00
ip_input.c [IPV4]: Clear the whole IPCB, this clears also IPCB(skb)->flags. 2006-07-24 23:45:16 -07:00
ip_options.c [IPV4]: Get rid of redundant IPCB->opts initialisation 2006-07-21 14:29:53 -07:00
ip_output.c [IPV6]: SNMPv2 "ipv6IfStatsOutFragCreates" counter error 2006-08-02 13:41:21 -07:00
ip_sockglue.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
ipcomp.c [NET]: Conversions from kmalloc+memset to k(z|c)alloc. 2006-07-21 14:51:30 -07:00
ipconfig.c [NET]: Convert RTNL to mutex. 2006-03-20 22:23:58 -08:00
ipip.c [IPV4]: Get rid of redundant IPCB->opts initialisation 2006-07-21 14:29:53 -07:00
ipmr.c [IPV4] ipmr: ip multicast route bug fix. 2006-07-25 16:45:12 -07:00
Kconfig [TCP]: Remove TCP Compound 2006-07-10 14:50:35 -07:00
Makefile [TCP]: Remove TCP Compound 2006-07-10 14:50:35 -07:00
multipath.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
multipath_drr.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
multipath_random.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
multipath_rr.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
multipath_wrandom.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
netfilter.c [NETFILTER]: Add address family specific checksum helpers 2006-04-09 22:25:41 -07:00
proc.c [PATCH] for_each_possible_cpu: network codes 2006-04-11 06:18:31 -07:00
protocol.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
raw.c [IPV4/IPV6]: Setting 0 for unused port field in RAW IP recvmsg(). 2006-07-25 17:05:35 -07:00
route.c [NET]: Core net changes to generate netevents 2006-08-02 13:38:21 -07:00
syncookies.c [ICSK]: Rename struct tcp_func to struct inet_connection_sock_af_ops 2006-01-03 13:10:38 -08:00
sysctl_net_ipv4.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
tcp.c [TCP]: Process linger2 timeout consistently. 2006-08-02 13:38:24 -07:00
tcp_bic.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
tcp_cong.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
tcp_cubic.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
tcp_diag.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
tcp_highspeed.c [TCP] tcp_highspeed: Fix AI updates. 2006-07-12 13:58:50 -07:00
tcp_htcp.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
tcp_hybla.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
tcp_input.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
tcp_ipv4.c [TCP]: SNMPv2 tcpAttemptFails counter error 2006-08-02 13:38:19 -07:00
tcp_lp.c [TCP]: TCP Low Priority congestion control 2006-06-17 21:29:21 -07:00
tcp_minisocks.c [TCP]: SNMPv2 tcpAttemptFails counter error 2006-08-02 13:38:19 -07:00
tcp_output.c [NET]: Generalise TSO-specific bits from skb_setup_caps 2006-06-30 14:12:08 -07:00
tcp_probe.c [TCP]: fix memory leak in net/ipv4/tcp_probe.c::tcpprobe_read() 2006-08-02 13:38:18 -07:00
tcp_scalable.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
tcp_timer.c [TCP]: MTU probing 2006-03-20 17:53:41 -08:00
tcp_vegas.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
tcp_veno.c [TCP]: Minimum congestion window consolidation. 2006-06-17 21:29:29 -07:00
tcp_westwood.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
tunnel4.c [INET]: Move no-tunnel ICMP error to tunnel4/tunnel6 2006-04-09 22:25:25 -07:00
udp.c [NET]: Conversions from kmalloc+memset to k(z|c)alloc. 2006-07-21 14:51:30 -07:00
xfrm4_input.c [IPSEC] xfrm: Abstract out encapsulation modes 2006-06-17 21:28:39 -07:00
xfrm4_mode_transport.c [IPSEC] proto: Move transport mode input path into xfrm_mode_transport 2006-06-17 21:28:41 -07:00
xfrm4_mode_tunnel.c [IPV4]: Get rid of redundant IPCB->opts initialisation 2006-07-21 14:29:53 -07:00
xfrm4_output.c [NET] gso: Add skb_is_gso 2006-07-08 13:34:32 -07:00
xfrm4_policy.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
xfrm4_state.c [IPSEC] xfrm: Undo afinfo lock proliferation 2006-06-17 21:28:37 -07:00
xfrm4_tunnel.c [IPSEC]: Kill unused decap state argument 2006-04-01 00:52:46 -08:00