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NFSv4: Add tracing for COMPOUND errors

Browse source 
When the server returns a different operation than we expected, then
trace that.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Trond Myklebust 2021-04-01 14:38:13 -04:00
parent ce62b114bb
commit da934ae0a8
2 changed files with 36 additions and 3 deletions
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35
fs/nfs/nfs4trace.h
View file

@ -666,6 +666,41 @@ TRACE_EVENT(nfs4_state_mgr_failed,
)
)
TRACE_EVENT(nfs4_xdr_bad_operation,
TP_PROTO(
const struct xdr_stream *xdr,
u32 op,
u32 expected
),
TP_ARGS(xdr, op, expected),
TP_STRUCT__entry(
__field(unsigned int, task_id)
__field(unsigned int, client_id)
__field(u32, xid)
__field(u32, op)
__field(u32, expected)
),
TP_fast_assign(
const struct rpc_rqst *rqstp = xdr->rqst;
const struct rpc_task *task = rqstp->rq_task;
__entry->task_id = task->tk_pid;
__entry->client_id = task->tk_client->cl_clid;
__entry->xid = be32_to_cpu(rqstp->rq_xid);
__entry->op = op;
__entry->expected = expected;
),
TP_printk(
"task:%u@%d xid=0x%08x operation=%u, expected=%u",
__entry->task_id, __entry->client_id, __entry->xid,
__entry->op, __entry->expected
)
);
TRACE_EVENT(nfs4_xdr_status,
TP_PROTO(
const struct xdr_stream *xdr,

4
fs/nfs/nfs4xdr.c
View file

@ -3210,9 +3210,7 @@ static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
*nfs_retval = nfs4_stat_to_errno(nfserr);
return true;
out_bad_operation:
dprintk("nfs: Server returned operation"
" %d but we issued a request for %d\n",
opnum, expected);
trace_nfs4_xdr_bad_operation(xdr, opnum, expected);
*nfs_retval = -EREMOTEIO;
return false;
out_overflow: