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NFS: Record task, client ID, and XID in xdr_status trace points

Browse source 
When triggering an nfs_xdr_status trace point, record the task ID
and XID of the failing RPC to better pinpoint the problem.

This feels like a bit of a layering violation.

Suggested-by: Trond Myklebust <trondmy@hammerspace.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Chuck Lever 2019-06-19 10:34:09 -04:00 committed by Anna Schumaker
parent 7d4006c161
commit 62a92ba97a
5 changed files with 29 additions and 7 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
fs/nfs/nfs2xdr.c
View file

@ -151,7 +151,7 @@ static int decode_stat(struct xdr_stream *xdr, enum nfs_stat *status)
return 0;
out_status:
*status = be32_to_cpup(p);
trace_nfs_xdr_status((int)*status);
trace_nfs_xdr_status(xdr, (int)*status);
return 0;
}

2
fs/nfs/nfs3xdr.c
View file

@ -343,7 +343,7 @@ static int decode_nfsstat3(struct xdr_stream *xdr, enum nfs_stat *status)
return 0;
out_status:
*status = be32_to_cpup(p);
trace_nfs_xdr_status((int)*status);
trace_nfs_xdr_status(xdr, (int)*status);
return 0;
}

15
fs/nfs/nfs4trace.h
View file

@ -564,24 +564,35 @@ TRACE_EVENT(nfs4_setup_sequence,
TRACE_EVENT(nfs4_xdr_status,
TP_PROTO(
const struct xdr_stream *xdr,
u32 op,
int error
),
TP_ARGS(op, error),
TP_ARGS(xdr, op, error),
TP_STRUCT__entry(
__field(unsigned int, task_id)
__field(unsigned int, client_id)
__field(u32, xid)
__field(u32, op)
__field(unsigned long, error)
),
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->error = error;
),
TP_printk(
"error=%ld (%s) operation %d:",
"task:%u@%d xid=0x%08x error=%ld (%s) operation=%u",
__entry->task_id, __entry->client_id, __entry->xid,
-__entry->error, show_nfsv4_errors(__entry->error),
__entry->op
)

2
fs/nfs/nfs4xdr.c
View file

@ -3187,7 +3187,7 @@ static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
return true;
out_status:
nfserr = be32_to_cpup(p);
trace_nfs4_xdr_status(opnum, nfserr);
trace_nfs4_xdr_status(xdr, opnum, nfserr);
*nfs_retval = nfs4_stat_to_errno(nfserr);
return true;
out_bad_operation:

15
fs/nfs/nfstrace.h
View file

@ -1139,21 +1139,32 @@ TRACE_DEFINE_ENUM(NFSERR_JUKEBOX);
TRACE_EVENT(nfs_xdr_status,
TP_PROTO(
const struct xdr_stream *xdr,
int error
),
TP_ARGS(error),
TP_ARGS(xdr, error),
TP_STRUCT__entry(
__field(unsigned int, task_id)
__field(unsigned int, client_id)
__field(u32, xid)
__field(unsigned long, error)
),
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->error = error;
),
TP_printk(
"error=%ld (%s)",
"task:%u@%d xid=0x%08x error=%ld (%s)",
__entry->task_id, __entry->client_id, __entry->xid,
-__entry->error, nfs_show_status(__entry->error)
)
);