net: add LINUX_MIB_PFMEMALLOCDROP counter
Debugging issues caused by pfmemalloc is often tedious. Add a new SNMP counter to more easily diagnose these problems. Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Josef Bacik <jbacik@fb.com> Acked-by: Josef Bacik <jbacik@fb.com> Signed-off-by: David S. Miller <davem@davemloft.net>zero-colors
parent
6610910939
commit
8fe809a992
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@ -240,6 +240,7 @@ enum
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LINUX_MIB_SACKMERGED,
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LINUX_MIB_SACKMERGED,
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LINUX_MIB_SACKSHIFTFALLBACK,
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LINUX_MIB_SACKSHIFTFALLBACK,
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LINUX_MIB_TCPBACKLOGDROP,
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LINUX_MIB_TCPBACKLOGDROP,
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LINUX_MIB_PFMEMALLOCDROP,
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LINUX_MIB_TCPMINTTLDROP, /* RFC 5082 */
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LINUX_MIB_TCPMINTTLDROP, /* RFC 5082 */
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LINUX_MIB_TCPDEFERACCEPTDROP,
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LINUX_MIB_TCPDEFERACCEPTDROP,
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LINUX_MIB_IPRPFILTER, /* IP Reverse Path Filter (rp_filter) */
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LINUX_MIB_IPRPFILTER, /* IP Reverse Path Filter (rp_filter) */
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@ -76,9 +76,10 @@ int sk_filter_trim_cap(struct sock *sk, struct sk_buff *skb, unsigned int cap)
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* allow SOCK_MEMALLOC sockets to use it as this socket is
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* allow SOCK_MEMALLOC sockets to use it as this socket is
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* helping free memory
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* helping free memory
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*/
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*/
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if (skb_pfmemalloc(skb) && !sock_flag(sk, SOCK_MEMALLOC))
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if (skb_pfmemalloc(skb) && !sock_flag(sk, SOCK_MEMALLOC)) {
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NET_INC_STATS(sock_net(sk), LINUX_MIB_PFMEMALLOCDROP);
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return -ENOMEM;
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return -ENOMEM;
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}
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err = BPF_CGROUP_RUN_PROG_INET_INGRESS(sk, skb);
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err = BPF_CGROUP_RUN_PROG_INET_INGRESS(sk, skb);
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if (err)
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if (err)
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return err;
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return err;
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@ -262,6 +262,7 @@ static const struct snmp_mib snmp4_net_list[] = {
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SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED),
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SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED),
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SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK),
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SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK),
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SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP),
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SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP),
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SNMP_MIB_ITEM("PFMemallocDrop", LINUX_MIB_PFMEMALLOCDROP),
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SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP),
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SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP),
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SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP),
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SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP),
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SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER),
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SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER),
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