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nfsd: Trace NFSv4 COMPOUND execution

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This helps record the identity and timing of the ops in each NFSv4
COMPOUND, replacing dprintk calls that did much the same thing.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Chuck Lever 2018-03-27 10:53:54 -04:00 committed by J. Bruce Fields
parent 87c5942e8f
commit fff4080b2f
2 changed files with 42 additions and 6 deletions
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9
fs/nfsd/nfs4proc.c
View file

@ -1721,12 +1721,10 @@ nfsd4_proc_compound(struct svc_rqst *rqstp)
goto encode_op;
}
trace_nfsd_compound(rqstp, args->opcnt);
while (!status && resp->opcnt < args->opcnt) {
op = &args->ops[resp->opcnt++];
dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
resp->opcnt, args->opcnt, op->opnum,
nfsd4_op_name(op->opnum));
/*
* The XDR decode routines may have pre-set op->status;
* for example, if there is a miscellaneous XDR error
@ -1800,9 +1798,8 @@ nfsd4_proc_compound(struct svc_rqst *rqstp)
status = op->status;
}
dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
args->ops, args->opcnt, resp->opcnt, op->opnum,
be32_to_cpu(status));
trace_nfsd_compound_status(args->opcnt, resp->opcnt, status,
nfsd4_op_name(op->opnum));
nfsd4_cstate_clear_replay(cstate);
nfsd4_increment_op_stats(op->opnum);

39
fs/nfsd/trace.h
View file

@ -11,6 +11,45 @@
#include <linux/tracepoint.h>
#include "nfsfh.h"
TRACE_EVENT(nfsd_compound,
TP_PROTO(const struct svc_rqst *rqst,
u32 args_opcnt),
TP_ARGS(rqst, args_opcnt),
TP_STRUCT__entry(
__field(u32, xid)
__field(u32, args_opcnt)
),
TP_fast_assign(
__entry->xid = be32_to_cpu(rqst->rq_xid);
__entry->args_opcnt = args_opcnt;
),
TP_printk("xid=0x%08x opcnt=%u",
__entry->xid, __entry->args_opcnt)
)
TRACE_EVENT(nfsd_compound_status,
TP_PROTO(u32 args_opcnt,
u32 resp_opcnt,
__be32 status,
const char *name),
TP_ARGS(args_opcnt, resp_opcnt, status, name),
TP_STRUCT__entry(
__field(u32, args_opcnt)
__field(u32, resp_opcnt)
__field(int, status)
__string(name, name)
),
TP_fast_assign(
__entry->args_opcnt = args_opcnt;
__entry->resp_opcnt = resp_opcnt;
__entry->status = be32_to_cpu(status);
__assign_str(name, name);
),
TP_printk("op=%u/%u %s status=%d",
__entry->resp_opcnt, __entry->args_opcnt,
__get_str(name), __entry->status)
)
DECLARE_EVENT_CLASS(nfsd_io_class,
TP_PROTO(struct svc_rqst *rqstp,
struct svc_fh *fhp,