For troubleshooting purposes, record GARBAGE_ARGS and CANT_ENCODE
failures.
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
---
fs/nfsd/nfssvc.c | 17 +++++----------
fs/nfsd/trace.h | 60 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 65 insertions(+), 12 deletions(-)
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index c4c646f25f1c..7214e578c09c 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -29,6 +29,8 @@
#include "netns.h"
#include "filecache.h"
+#include "trace.h"
+
#define NFSDDBG_FACILITY NFSDDBG_SVC
bool inter_copy_offload_enable;
@@ -1009,11 +1011,8 @@ int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp)
struct kvec *resv = &rqstp->rq_res.head[0];
__be32 *p;
- dprintk("nfsd_dispatch: vers %d proc %d\n",
- rqstp->rq_vers, rqstp->rq_proc);
-
if (nfs_request_too_big(rqstp, proc))
- goto out_too_large;
+ goto out_decode_err;
/*
* Give the xdr decoder a chance to change this if it wants
@@ -1052,24 +1051,18 @@ int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp)
out_cached_reply:
return 1;
-out_too_large:
- dprintk("nfsd: NFSv%d argument too large\n", rqstp->rq_vers);
- *statp = rpc_garbage_args;
- return 1;
-
out_decode_err:
- dprintk("nfsd: failed to decode arguments!\n");
+ trace_nfsd_garbage_args_err(rqstp);
*statp = rpc_garbage_args;
return 1;
out_update_drop:
- dprintk("nfsd: Dropping request; may be revisited later\n");
nfsd_cache_update(rqstp, RC_NOCACHE, NULL);
out_dropit:
return 0;
out_encode_err:
- dprintk("nfsd: failed to encode result!\n");
+ trace_nfsd_cant_encode_err(rqstp);
nfsd_cache_update(rqstp, RC_NOCACHE, NULL);
*statp = rpc_system_err;
return 1;
diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h
index 89f218d0279c..0bf1707bd846 100644
--- a/fs/nfsd/trace.h
+++ b/fs/nfsd/trace.h
@@ -12,6 +12,66 @@
#include "export.h"
#include "nfsfh.h"
+#define NFSD_TRACE_PROC_ARG_FIELDS \
+ __field(unsigned int, netns_ino) \
+ __field(u32, xid) \
+ __array(unsigned char, server, sizeof(struct sockaddr_in6)) \
+ __array(unsigned char, client, sizeof(struct sockaddr_in6))
+
+#define NFSD_TRACE_PROC_ARG_ASSIGNMENTS \
+ do { \
+ __entry->netns_ino = SVC_NET(rqstp)->ns.inum; \
+ __entry->xid = be32_to_cpu(rqstp->rq_xid); \
+ memcpy(__entry->server, &rqstp->rq_xprt->xpt_local, \
+ rqstp->rq_xprt->xpt_locallen); \
+ memcpy(__entry->client, &rqstp->rq_xprt->xpt_remote, \
+ rqstp->rq_xprt->xpt_remotelen); \
+ } while (0);
+
+TRACE_EVENT(nfsd_garbage_args_err,
+ TP_PROTO(
+ const struct svc_rqst *rqstp
+ ),
+ TP_ARGS(rqstp),
+ TP_STRUCT__entry(
+ NFSD_TRACE_PROC_ARG_FIELDS
+
+ __field(u32, vers)
+ __field(u32, proc)
+ ),
+ TP_fast_assign(
+ NFSD_TRACE_PROC_ARG_ASSIGNMENTS
+
+ __entry->vers = rqstp->rq_vers;
+ __entry->proc = rqstp->rq_proc;
+ ),
+ TP_printk("xid=0x%08x vers=%u proc=%u",
+ __entry->xid, __entry->vers, __entry->proc
+ )
+);
+
+TRACE_EVENT(nfsd_cant_encode_err,
+ TP_PROTO(
+ const struct svc_rqst *rqstp
+ ),
+ TP_ARGS(rqstp),
+ TP_STRUCT__entry(
+ NFSD_TRACE_PROC_ARG_FIELDS
+
+ __field(u32, vers)
+ __field(u32, proc)
+ ),
+ TP_fast_assign(
+ NFSD_TRACE_PROC_ARG_ASSIGNMENTS
+
+ __entry->vers = rqstp->rq_vers;
+ __entry->proc = rqstp->rq_proc;
+ ),
+ TP_printk("xid=0x%08x vers=%u proc=%u",
+ __entry->xid, __entry->vers, __entry->proc
+ )
+);
+
#define show_nfsd_may_flags(x) \
__print_flags(x, "|", \
{ NFSD_MAY_EXEC, "EXEC" }, \
