diff options
| -rw-r--r-- | include/trace/events/sock.h | 68 | ||||
| -rw-r--r-- | net/core/net-traces.c | 1 | ||||
| -rw-r--r-- | net/core/sock.c | 5 |
3 files changed, 74 insertions, 0 deletions
diff --git a/include/trace/events/sock.h b/include/trace/events/sock.h new file mode 100644 index 000000000000..779abb91df81 --- /dev/null +++ b/include/trace/events/sock.h @@ -0,0 +1,68 @@ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM sock + +#if !defined(_TRACE_SOCK_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_SOCK_H + +#include <net/sock.h> +#include <linux/tracepoint.h> + +TRACE_EVENT(sock_rcvqueue_full, + + TP_PROTO(struct sock *sk, struct sk_buff *skb), + + TP_ARGS(sk, skb), + + TP_STRUCT__entry( + __field(int, rmem_alloc) + __field(unsigned int, truesize) + __field(int, sk_rcvbuf) + ), + + TP_fast_assign( + __entry->rmem_alloc = atomic_read(&sk->sk_rmem_alloc); + __entry->truesize = skb->truesize; + __entry->sk_rcvbuf = sk->sk_rcvbuf; + ), + + TP_printk("rmem_alloc=%d truesize=%u sk_rcvbuf=%d", + __entry->rmem_alloc, __entry->truesize, __entry->sk_rcvbuf) +); + +TRACE_EVENT(sock_exceed_buf_limit, + + TP_PROTO(struct sock *sk, struct proto *prot, long allocated), + + TP_ARGS(sk, prot, allocated), + + TP_STRUCT__entry( + __array(char, name, 32) + __field(long *, sysctl_mem) + __field(long, allocated) + __field(int, sysctl_rmem) + __field(int, rmem_alloc) + ), + + TP_fast_assign( + strncpy(__entry->name, prot->name, 32); + __entry->sysctl_mem = prot->sysctl_mem; + __entry->allocated = allocated; + __entry->sysctl_rmem = prot->sysctl_rmem[0]; + __entry->rmem_alloc = atomic_read(&sk->sk_rmem_alloc); + ), + + TP_printk("proto:%s sysctl_mem=%ld,%ld,%ld allocated=%ld " + "sysctl_rmem=%d rmem_alloc=%d", + __entry->name, + __entry->sysctl_mem[0], + __entry->sysctl_mem[1], + __entry->sysctl_mem[2], + __entry->allocated, + __entry->sysctl_rmem, + __entry->rmem_alloc) +); + +#endif /* _TRACE_SOCK_H */ + +/* This part must be outside protection */ +#include <trace/define_trace.h> diff --git a/net/core/net-traces.c b/net/core/net-traces.c index 13aab64520ad..52380b1d552a 100644 --- a/net/core/net-traces.c +++ b/net/core/net-traces.c @@ -28,6 +28,7 @@ #include <trace/events/skb.h> #include <trace/events/net.h> #include <trace/events/napi.h> +#include <trace/events/sock.h> #include <trace/events/udp.h> EXPORT_TRACEPOINT_SYMBOL_GPL(kfree_skb); diff --git a/net/core/sock.c b/net/core/sock.c index 6e819780c232..76c403146750 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -128,6 +128,8 @@ #include <linux/filter.h> +#include <trace/events/sock.h> + #ifdef CONFIG_INET #include <net/tcp.h> #endif @@ -292,6 +294,7 @@ int sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) if (atomic_read(&sk->sk_rmem_alloc) + skb->truesize >= (unsigned)sk->sk_rcvbuf) { atomic_inc(&sk->sk_drops); + trace_sock_rcvqueue_full(sk, skb); return -ENOMEM; } @@ -1736,6 +1739,8 @@ suppress_allocation: return 1; } + trace_sock_exceed_buf_limit(sk, prot, allocated); + /* Alas. Undo changes. */ sk->sk_forward_alloc -= amt * SK_MEM_QUANTUM; atomic_long_sub(amt, prot->memory_allocated); |