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NFSD: Trace NFSv4 COMPOUND tags

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The Linux NFSv4 client implementation does not use COMPOUND tags,
but the Solaris and MacOS implementations do, and so does pynfs.
Record these eye-catchers in the server's trace buffer to annotate
client requests while troubleshooting.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
This commit is contained in:
Chuck Lever 2022-09-08 18:13:48 -04:00
parent 948755efc9
commit de29cf7e6c
2 changed files with 15 additions and 8 deletions
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2
fs/nfsd/nfs4proc.c
View File

@ -2643,7 +2643,7 @@ nfsd4_proc_compound(struct svc_rqst *rqstp)
rqstp->rq_lease_breaker = (void **)&cstate->clp;
trace_nfsd_compound(rqstp, args->client_opcnt);
trace_nfsd_compound(rqstp, args->tag, args->taglen, args->client_opcnt);
while (!status && resp->opcnt < args->opcnt) {
op = &args->ops[resp->opcnt++];

21
fs/nfsd/trace.h
View File

@ -84,19 +84,26 @@ DEFINE_NFSD_XDR_ERR_EVENT(cant_encode);
{ NFSD_MAY_64BIT_COOKIE, "64BIT_COOKIE" })
TRACE_EVENT(nfsd_compound,
TP_PROTO(const struct svc_rqst *rqst,
u32 args_opcnt),
TP_ARGS(rqst, args_opcnt),
TP_PROTO(
const struct svc_rqst *rqst,
const char *tag,
u32 taglen,
u32 opcnt
),
TP_ARGS(rqst, tag, taglen, opcnt),
TP_STRUCT__entry(
__field(u32, xid)
__field(u32, args_opcnt)
__field(u32, opcnt)
__string_len(tag, tag, taglen)
),
TP_fast_assign(
__entry->xid = be32_to_cpu(rqst->rq_xid);
__entry->args_opcnt = args_opcnt;
__entry->opcnt = opcnt;
__assign_str_len(tag, tag, taglen);
),
TP_printk("xid=0x%08x opcnt=%u",
__entry->xid, __entry->args_opcnt)
TP_printk("xid=0x%08x opcnt=%u tag=%s",
__entry->xid, __entry->opcnt, __get_str(tag)
)
)
TRACE_EVENT(nfsd_compound_status,