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sunrpc: add some tracepoints in svc_rqst handling functions

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...just around svc_send, svc_recv and svc_process for now.

Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Jeff Layton 2014-10-28 14:24:12 -04:00 committed by Trond Myklebust
parent 878ffa9f85
commit 860a0d9e51
3 changed files with 88 additions and 19 deletions
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55
include/trace/events/sunrpc.h
View File

@ -6,6 +6,7 @@
#include <linux/sunrpc/sched.h>
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/svc.h>
#include <net/tcp_states.h>
#include <linux/net.h>
#include <linux/tracepoint.h>
@ -306,6 +307,60 @@ DEFINE_RPC_SOCKET_EVENT_DONE(rpc_socket_reset_connection);
DEFINE_RPC_SOCKET_EVENT(rpc_socket_close);
DEFINE_RPC_SOCKET_EVENT(rpc_socket_shutdown);
TRACE_EVENT(svc_recv,
TP_PROTO(struct svc_rqst *rqst, int status),
TP_ARGS(rqst, status),
TP_STRUCT__entry(
__field(struct sockaddr *, addr)
__field(__be32, xid)
__field(int, status)
),
TP_fast_assign(
__entry->addr = (struct sockaddr *)&rqst->rq_addr;
__entry->xid = status > 0 ? rqst->rq_xid : 0;
__entry->status = status;
),
TP_printk("addr=%pIScp xid=0x%x status=%d", __entry->addr,
be32_to_cpu(__entry->xid), __entry->status)
);
DECLARE_EVENT_CLASS(svc_rqst_status,
TP_PROTO(struct svc_rqst *rqst, int status),
TP_ARGS(rqst, status),
TP_STRUCT__entry(
__field(struct sockaddr *, addr)
__field(__be32, xid)
__field(int, dropme)
__field(int, status)
),
TP_fast_assign(
__entry->addr = (struct sockaddr *)&rqst->rq_addr;
__entry->xid = rqst->rq_xid;
__entry->dropme = (int)rqst->rq_dropme;
__entry->status = status;
),
TP_printk("addr=%pIScp rq_xid=0x%x dropme=%d status=%d",
__entry->addr, be32_to_cpu(__entry->xid), __entry->dropme,
__entry->status)
);
DEFINE_EVENT(svc_rqst_status, svc_process,
TP_PROTO(struct svc_rqst *rqst, int status),
TP_ARGS(rqst, status));
DEFINE_EVENT(svc_rqst_status, svc_send,
TP_PROTO(struct svc_rqst *rqst, int status),
TP_ARGS(rqst, status));
#endif /* _TRACE_SUNRPC_H */
#include <trace/define_trace.h>

21
net/sunrpc/svc.c
View File

@ -28,6 +28,8 @@
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/bc_xprt.h>
#include <trace/events/sunrpc.h>
#define RPCDBG_FACILITY RPCDBG_SVCDSP
static void svc_unregister(const struct svc_serv *serv, struct net *net);
@ -1314,24 +1316,25 @@ svc_process(struct svc_rqst *rqstp)
rqstp->rq_res.tail[0].iov_base = NULL;
rqstp->rq_res.tail[0].iov_len = 0;
rqstp->rq_xid = svc_getu32(argv);
dir = svc_getnl(argv);
if (dir != 0) {
/* direction != CALL */
svc_printk(rqstp, "bad direction %d, dropping request\n", dir);
serv->sv_stats->rpcbadfmt++;
svc_drop(rqstp);
return 0;
goto out_drop;
}
/* Returns 1 for send, 0 for drop */
if (svc_process_common(rqstp, argv, resv))
return svc_send(rqstp);
else {
svc_drop(rqstp);
return 0;
if (likely(svc_process_common(rqstp, argv, resv))) {
int ret = svc_send(rqstp);
trace_svc_process(rqstp, ret);
return ret;
}
out_drop:
trace_svc_process(rqstp, 0);
svc_drop(rqstp);
return 0;
}
#if defined(CONFIG_SUNRPC_BACKCHANNEL)

31
net/sunrpc/svc_xprt.c
View File

@ -15,6 +15,7 @@
#include <linux/sunrpc/svcsock.h>
#include <linux/sunrpc/xprt.h>
#include <linux/module.h>
#include <trace/events/sunrpc.h>
#define RPCDBG_FACILITY RPCDBG_SVCXPRT
@ -773,35 +774,43 @@ int svc_recv(struct svc_rqst *rqstp, long timeout)
err = svc_alloc_arg(rqstp);
if (err)
return err;
goto out;
try_to_freeze();
cond_resched();
err = -EINTR;
if (signalled() || kthread_should_stop())
return -EINTR;
goto out;
xprt = svc_get_next_xprt(rqstp, timeout);
if (IS_ERR(xprt))
return PTR_ERR(xprt);
if (IS_ERR(xprt)) {
err = PTR_ERR(xprt);
goto out;
}
len = svc_handle_xprt(rqstp, xprt);
/* No data, incomplete (TCP) read, or accept() */
err = -EAGAIN;
if (len <= 0)
goto out;
goto out_release;
clear_bit(XPT_OLD, &xprt->xpt_flags);
rqstp->rq_secure = xprt->xpt_ops->xpo_secure_port(rqstp);
rqstp->rq_chandle.defer = svc_defer;
rqstp->rq_xid = svc_getu32(&rqstp->rq_arg.head[0]);
if (serv->sv_stats)
serv->sv_stats->netcnt++;
trace_svc_recv(rqstp, len);
return len;
out:
out_release:
rqstp->rq_res.len = 0;
svc_xprt_release(rqstp);
return -EAGAIN;
out:
trace_svc_recv(rqstp, err);
return err;
}
EXPORT_SYMBOL_GPL(svc_recv);
@ -821,12 +830,12 @@ EXPORT_SYMBOL_GPL(svc_drop);
int svc_send(struct svc_rqst *rqstp)
{
struct svc_xprt *xprt;
int len;
int len = -EFAULT;
struct xdr_buf *xb;
xprt = rqstp->rq_xprt;
if (!xprt)
return -EFAULT;
goto out;
/* release the receive skb before sending the reply */
rqstp->rq_xprt->xpt_ops->xpo_release_rqst(rqstp);
@ -849,7 +858,9 @@ int svc_send(struct svc_rqst *rqstp)
svc_xprt_release(rqstp);
if (len == -ECONNREFUSED || len == -ENOTCONN || len == -EAGAIN)
return 0;
len = 0;
out:
trace_svc_send(rqstp, len);
return len;
}