From ece200ddd54b9ce840cfee554fb812560c545c7d Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Tue, 27 Mar 2018 10:51:00 -0400 Subject: [PATCH] sunrpc: Save remote presentation address in svc_xprt for trace events TP_printk defines a format string that is passed to user space for converting raw trace event records to something human-readable. My user space's printf (Oracle Linux 7), however, does not have a %pI format specifier. The result is that what is supposed to be an IP address in the output of "trace-cmd report" is just a string that says the field couldn't be displayed. To fix this, adopt the same approach as the client: maintain a pre- formated presentation address for occasions when %pI is not available. The location of the trace_svc_send trace point is adjusted so that rqst->rq_xprt is not NULL when the trace event is recorded. Signed-off-by: Chuck Lever Signed-off-by: J. Bruce Fields --- include/linux/sunrpc/svc_xprt.h | 4 ++ include/trace/events/sunrpc.h | 89 ++++++++++++-------------------- net/sunrpc/svc_xprt.c | 3 +- net/sunrpc/svcsock.c | 1 + net/sunrpc/xprtrdma/svc_rdma_transport.c | 4 +- 5 files changed, 43 insertions(+), 58 deletions(-) diff --git a/include/linux/sunrpc/svc_xprt.h b/include/linux/sunrpc/svc_xprt.h index 19475ac..c3d7206 100644 --- a/include/linux/sunrpc/svc_xprt.h +++ b/include/linux/sunrpc/svc_xprt.h @@ -83,6 +83,7 @@ struct svc_xprt { size_t xpt_locallen; /* length of address */ struct sockaddr_storage xpt_remote; /* remote peer's address */ size_t xpt_remotelen; /* length of address */ + char xpt_remotebuf[INET6_ADDRSTRLEN + 10]; struct rpc_wait_queue xpt_bc_pending; /* backchannel wait queue */ struct list_head xpt_users; /* callbacks on free */ @@ -152,7 +153,10 @@ static inline void svc_xprt_set_remote(struct svc_xprt *xprt, { memcpy(&xprt->xpt_remote, sa, salen); xprt->xpt_remotelen = salen; + snprintf(xprt->xpt_remotebuf, sizeof(xprt->xpt_remotebuf) - 1, + "%pISpc", sa); } + static inline unsigned short svc_addr_port(const struct sockaddr *sa) { const struct sockaddr_in *sin = (const struct sockaddr_in *)sa; diff --git a/include/trace/events/sunrpc.h b/include/trace/events/sunrpc.h index 5849bfb..1ec8c4c 100644 --- a/include/trace/events/sunrpc.h +++ b/include/trace/events/sunrpc.h @@ -493,20 +493,18 @@ TRACE_EVENT(svc_recv, __field(u32, xid) __field(int, len) __field(unsigned long, flags) - __dynamic_array(unsigned char, addr, rqst->rq_addrlen) + __string(addr, rqst->rq_xprt->xpt_remotebuf) ), TP_fast_assign( __entry->xid = be32_to_cpu(rqst->rq_xid); __entry->len = len; __entry->flags = rqst->rq_flags; - memcpy(__get_dynamic_array(addr), - &rqst->rq_addr, rqst->rq_addrlen); + __assign_str(addr, rqst->rq_xprt->xpt_remotebuf); ), - TP_printk("addr=%pIScp xid=0x%08x len=%d flags=%s", - (struct sockaddr *)__get_dynamic_array(addr), - __entry->xid, __entry->len, + TP_printk("addr=%s xid=0x%08x len=%d flags=%s", + __get_str(addr), __entry->xid, __entry->len, show_rqstp_flags(__entry->flags)) ); @@ -519,20 +517,18 @@ DECLARE_EVENT_CLASS(svc_rqst_event, TP_STRUCT__entry( __field(u32, xid) __field(unsigned long, flags) - __dynamic_array(unsigned char, addr, rqst->rq_addrlen) + __string(addr, rqst->rq_xprt->xpt_remotebuf) ), TP_fast_assign( __entry->xid = be32_to_cpu(rqst->rq_xid); __entry->flags = rqst->rq_flags; - memcpy(__get_dynamic_array(addr), - &rqst->rq_addr, rqst->rq_addrlen); + __assign_str(addr, rqst->rq_xprt->xpt_remotebuf); ), - TP_printk("addr=%pIScp rq_xid=0x%08x flags=%s", - (struct sockaddr *)__get_dynamic_array(addr), - __entry->xid, - show_rqstp_flags(__entry->flags)) + TP_printk("addr=%s xid=0x%08x flags=%s", + __get_str(addr), __entry->xid, + show_rqstp_flags(__entry->flags)) ); DEFINE_EVENT(svc_rqst_event, svc_defer, @@ -553,21 +549,19 @@ DECLARE_EVENT_CLASS(svc_rqst_status, __field(u32, xid) __field(int, status) __field(unsigned long, flags) - __dynamic_array(unsigned char, addr, rqst->rq_addrlen) + __string(addr, rqst->rq_xprt->xpt_remotebuf) ), TP_fast_assign( __entry->xid = be32_to_cpu(rqst->rq_xid); __entry->status = status; __entry->flags = rqst->rq_flags; - memcpy(__get_dynamic_array(addr), - &rqst->rq_addr, rqst->rq_addrlen); + __assign_str(addr, rqst->rq_xprt->xpt_remotebuf); ), - TP_printk("addr=%pIScp rq_xid=0x%08x status=%d flags=%s", - (struct sockaddr *)__get_dynamic_array(addr), - __entry->xid, - __entry->status, show_rqstp_flags(__entry->flags)) + TP_printk("addr=%s xid=0x%08x status=%d flags=%s", + __get_str(addr), __entry->xid, + __entry->status, show_rqstp_flags(__entry->flags)) ); DEFINE_EVENT(svc_rqst_status, svc_process, @@ -604,26 +598,19 @@ TRACE_EVENT(svc_xprt_do_enqueue, __field(struct svc_xprt *, xprt) __field(int, pid) __field(unsigned long, flags) - __dynamic_array(unsigned char, addr, xprt != NULL ? - xprt->xpt_remotelen : 0) + __string(addr, xprt->xpt_remotebuf) ), TP_fast_assign( __entry->xprt = xprt; __entry->pid = rqst? rqst->rq_task->pid : 0; - if (xprt) { - memcpy(__get_dynamic_array(addr), - &xprt->xpt_remote, - xprt->xpt_remotelen); - __entry->flags = xprt->xpt_flags; - } else - __entry->flags = 0; + __entry->flags = xprt->xpt_flags; + __assign_str(addr, xprt->xpt_remotebuf); ), - TP_printk("xprt=0x%p addr=%pIScp pid=%d flags=%s", __entry->xprt, - __get_dynamic_array_len(addr) != 0 ? - (struct sockaddr *)__get_dynamic_array(addr) : NULL, - __entry->pid, show_svc_xprt_flags(__entry->flags)) + TP_printk("xprt=%p addr=%s pid=%d flags=%s", + __entry->xprt, __get_str(addr), + __entry->pid, show_svc_xprt_flags(__entry->flags)) ); DECLARE_EVENT_CLASS(svc_xprt_event, @@ -634,19 +621,18 @@ DECLARE_EVENT_CLASS(svc_xprt_event, TP_STRUCT__entry( __field(struct svc_xprt *, xprt) __field(unsigned long, flags) - __dynamic_array(unsigned char, addr, xprt->xpt_remotelen) + __string(addr, xprt->xpt_remotebuf) ), TP_fast_assign( __entry->xprt = xprt; __entry->flags = xprt->xpt_flags; - memcpy(__get_dynamic_array(addr), - &xprt->xpt_remote, xprt->xpt_remotelen); + __assign_str(addr, xprt->xpt_remotebuf); ), - TP_printk("xprt=0x%p addr=%pIScp flags=%s", __entry->xprt, - (struct sockaddr *)__get_dynamic_array(addr), - show_svc_xprt_flags(__entry->flags)) + TP_printk("xprt=%p addr=%s flags=%s", + __entry->xprt, __get_str(addr), + show_svc_xprt_flags(__entry->flags)) ); DEFINE_EVENT(svc_xprt_event, svc_xprt_dequeue, @@ -682,25 +668,18 @@ TRACE_EVENT(svc_handle_xprt, __field(struct svc_xprt *, xprt) __field(int, len) __field(unsigned long, flags) - __dynamic_array(unsigned char, addr, xprt != NULL ? - xprt->xpt_remotelen : 0) + __string(addr, xprt->xpt_remotebuf) ), TP_fast_assign( __entry->xprt = xprt; __entry->len = len; - if (xprt) { - memcpy(__get_dynamic_array(addr), - &xprt->xpt_remote, - xprt->xpt_remotelen); - __entry->flags = xprt->xpt_flags; - } else - __entry->flags = 0; + __entry->flags = xprt->xpt_flags; + __assign_str(addr, xprt->xpt_remotebuf); ), - TP_printk("xprt=0x%p addr=%pIScp len=%d flags=%s", __entry->xprt, - __get_dynamic_array_len(addr) != 0 ? - (struct sockaddr *)__get_dynamic_array(addr) : NULL, + TP_printk("xprt=%p addr=%s len=%d flags=%s", + __entry->xprt, __get_str(addr), __entry->len, show_svc_xprt_flags(__entry->flags)) ); @@ -712,18 +691,16 @@ DECLARE_EVENT_CLASS(svc_deferred_event, TP_STRUCT__entry( __field(u32, xid) - __dynamic_array(unsigned char, addr, dr->addrlen) + __string(addr, dr->xprt->xpt_remotebuf) ), TP_fast_assign( __entry->xid = be32_to_cpu(*(__be32 *)(dr->args + (dr->xprt_hlen>>2))); - memcpy(__get_dynamic_array(addr), &dr->addr, dr->addrlen); + __assign_str(addr, dr->xprt->xpt_remotebuf); ), - TP_printk("addr=%pIScp xid=0x%08x", - (struct sockaddr *)__get_dynamic_array(addr), - __entry->xid) + TP_printk("addr=%s xid=0x%08x", __get_str(addr), __entry->xid) ); DEFINE_EVENT(svc_deferred_event, svc_drop_deferred, diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c index 47384d0..f745754 100644 --- a/net/sunrpc/svc_xprt.c +++ b/net/sunrpc/svc_xprt.c @@ -173,6 +173,7 @@ void svc_xprt_init(struct net *net, struct svc_xprt_class *xcl, set_bit(XPT_BUSY, &xprt->xpt_flags); rpc_init_wait_queue(&xprt->xpt_bc_pending, "xpt_bc_pending"); xprt->xpt_net = get_net(net); + strcpy(xprt->xpt_remotebuf, "uninitialized"); } EXPORT_SYMBOL_GPL(svc_xprt_init); @@ -894,12 +895,12 @@ int svc_send(struct svc_rqst *rqstp) len = xprt->xpt_ops->xpo_sendto(rqstp); mutex_unlock(&xprt->xpt_mutex); rpc_wake_up(&xprt->xpt_bc_pending); + trace_svc_send(rqstp, len); svc_xprt_release(rqstp); if (len == -ECONNREFUSED || len == -ENOTCONN || len == -EAGAIN) len = 0; out: - trace_svc_send(rqstp, len); return len; } diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c index 9b67035..4ca1d92 100644 --- a/net/sunrpc/svcsock.c +++ b/net/sunrpc/svcsock.c @@ -1310,6 +1310,7 @@ static void svc_tcp_init(struct svc_sock *svsk, struct svc_serv *serv) set_bit(XPT_CONG_CTRL, &svsk->sk_xprt.xpt_flags); if (sk->sk_state == TCP_LISTEN) { dprintk("setting up TCP socket for listening\n"); + strcpy(svsk->sk_xprt.xpt_remotebuf, "listener"); set_bit(XPT_LISTENER, &svsk->sk_xprt.xpt_flags); sk->sk_data_ready = svc_tcp_listen_data_ready; set_bit(XPT_CONN, &svsk->sk_xprt.xpt_flags); diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c index 17da06d..96cc8f6 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_transport.c +++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c @@ -401,8 +401,10 @@ static struct svcxprt_rdma *rdma_create_xprt(struct svc_serv *serv, */ set_bit(XPT_CONG_CTRL, &cma_xprt->sc_xprt.xpt_flags); - if (listener) + if (listener) { + strcpy(cma_xprt->sc_xprt.xpt_remotebuf, "listener"); set_bit(XPT_LISTENER, &cma_xprt->sc_xprt.xpt_flags); + } return cma_xprt; } -- 2.7.4