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tcp: fix outsegs stat for TSO segments 

Account for TSO segments of an skb in TCP_MIB_OUTSEGS counter.  Without
doing this, the counter can be off by orders of magnitude from the
actual number of segments sent.

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tom Herbert 2010-04-22 07:00:24 +00:00 committed by David S. Miller
parent 3cfa856d6d
commit aa2ea0586d
3 changed files with 6 additions and 2 deletions
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2
include/net/snmp.h
View File

@ -133,6 +133,8 @@ struct linux_xfrm_mib {
__this_cpu_add(mib[0]->mibs[field], addend) __this_cpu_add(mib[0]->mibs[field], addend)
#define SNMP_ADD_STATS_USER(mib, field, addend) \ #define SNMP_ADD_STATS_USER(mib, field, addend) \
this_cpu_add(mib[1]->mibs[field], addend) this_cpu_add(mib[1]->mibs[field], addend)
#define SNMP_ADD_STATS(mib, field, addend) \
this_cpu_add(mib[0]->mibs[field], addend)
/* /*
* Use "__typeof__(*mib[0]) *ptr" instead of "__typeof__(mib[0]) ptr" * Use "__typeof__(*mib[0]) *ptr" instead of "__typeof__(mib[0]) ptr"
* to make @ptr a non-percpu pointer. * to make @ptr a non-percpu pointer.

1
include/net/tcp.h
View File

@ -294,6 +294,7 @@ extern struct proto tcp_prot;
#define TCP_INC_STATS_BH(net, field) SNMP_INC_STATS_BH((net)->mib.tcp_statistics, field) #define TCP_INC_STATS_BH(net, field) SNMP_INC_STATS_BH((net)->mib.tcp_statistics, field)
#define TCP_DEC_STATS(net, field) SNMP_DEC_STATS((net)->mib.tcp_statistics, field) #define TCP_DEC_STATS(net, field) SNMP_DEC_STATS((net)->mib.tcp_statistics, field)
#define TCP_ADD_STATS_USER(net, field, val) SNMP_ADD_STATS_USER((net)->mib.tcp_statistics, field, val) #define TCP_ADD_STATS_USER(net, field, val) SNMP_ADD_STATS_USER((net)->mib.tcp_statistics, field, val)
#define TCP_ADD_STATS(net, field, val) SNMP_ADD_STATS((net)->mib.tcp_statistics, field, val)
extern void tcp_v4_err(struct sk_buff *skb, u32); extern void tcp_v4_err(struct sk_buff *skb, u32);

5
net/ipv4/tcp_output.c
View File

@ -888,7 +888,8 @@ static int tcp_transmit_skb(struct sock *sk, struct sk_buff *skb, int clone_it,
tcp_event_data_sent(tp, skb, sk); tcp_event_data_sent(tp, skb, sk);
if (after(tcb->end_seq, tp->snd_nxt) || tcb->seq == tcb->end_seq) if (after(tcb->end_seq, tp->snd_nxt) || tcb->seq == tcb->end_seq)
TCP_INC_STATS(sock_net(sk), TCP_MIB_OUTSEGS); TCP_ADD_STATS(sock_net(sk), TCP_MIB_OUTSEGS,
tcp_skb_pcount(skb));
err = icsk->icsk_af_ops->queue_xmit(skb); err = icsk->icsk_af_ops->queue_xmit(skb);
if (likely(err <= 0)) if (likely(err <= 0))
@ -2503,7 +2504,7 @@ struct sk_buff *tcp_make_synack(struct sock *sk, struct dst_entry *dst,
th->window = htons(min(req->rcv_wnd, 65535U)); th->window = htons(min(req->rcv_wnd, 65535U));
tcp_options_write((__be32 *)(th + 1), tp, &opts); tcp_options_write((__be32 *)(th + 1), tp, &opts);
th->doff = (tcp_header_size >> 2); th->doff = (tcp_header_size >> 2);
TCP_INC_STATS(sock_net(sk), TCP_MIB_OUTSEGS); TCP_ADD_STATS(sock_net(sk), TCP_MIB_OUTSEGS, tcp_skb_pcount(skb));
#ifdef CONFIG_TCP_MD5SIG #ifdef CONFIG_TCP_MD5SIG
/* Okay, we have all we need - do the md5 hash if needed */ /* Okay, we have all we need - do the md5 hash if needed */