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NFSD: Add an nfsd_cb_offload tracepoint

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Record the arguments of CB_OFFLOAD callbacks so we can better
observe asynchronous copy-offload behavior. For example:

nfsd-995   [008]  7721.934222: nfsd_cb_offload:
        addr=192.168.2.51:0 client 6092a47c:35a43fc1 fh_hash=0x8739113a
        count=116528 status=0

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Cc: Olga Kornievskaia <kolga@netapp.com>
Cc: Dai Ngo <Dai.Ngo@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Chuck Lever 2021-05-14 15:57:14 -04:00 committed by J. Bruce Fields
parent 2cde7f8118
commit 87512386e9
2 changed files with 38 additions and 0 deletions
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2
fs/nfsd/nfs4proc.c
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@ -1497,6 +1497,8 @@ do_callback:
memcpy(&cb_copy->fh, &copy->fh, sizeof(copy->fh));
nfsd4_init_cb(&cb_copy->cp_cb, cb_copy->cp_clp,
&nfsd4_cb_offload_ops, NFSPROC4_CLNT_CB_OFFLOAD);
trace_nfsd_cb_offload(copy->cp_clp, &copy->cp_res.cb_stateid,
&copy->fh, copy->cp_count, copy->nfserr);
nfsd4_run_cb(&cb_copy->cp_cb);
out:
if (!copy->cp_intra)

36
fs/nfsd/trace.h
View File

@ -1053,6 +1053,42 @@ TRACE_EVENT(nfsd_cb_notify_lock,
__entry->fh_hash)
);
TRACE_EVENT(nfsd_cb_offload,
TP_PROTO(
const struct nfs4_client *clp,
const stateid_t *stp,
const struct knfsd_fh *fh,
u64 count,
__be32 status
),
TP_ARGS(clp, stp, fh, count, status),
TP_STRUCT__entry(
__field(u32, cl_boot)
__field(u32, cl_id)
__field(u32, si_id)
__field(u32, si_generation)
__field(u32, fh_hash)
__field(int, status)
__field(u64, count)
__array(unsigned char, addr, sizeof(struct sockaddr_in6))
),
TP_fast_assign(
__entry->cl_boot = stp->si_opaque.so_clid.cl_boot;
__entry->cl_id = stp->si_opaque.so_clid.cl_id;
__entry->si_id = stp->si_opaque.so_id;
__entry->si_generation = stp->si_generation;
__entry->fh_hash = knfsd_fh_hash(fh);
__entry->status = be32_to_cpu(status);
__entry->count = count;
memcpy(__entry->addr, &clp->cl_cb_conn.cb_addr,
sizeof(struct sockaddr_in6));
),
TP_printk("addr=%pISpc client %08x:%08x stateid %08x:%08x fh_hash=0x%08x count=%llu status=%d",
__entry->addr, __entry->cl_boot, __entry->cl_id,
__entry->si_id, __entry->si_generation,
__entry->fh_hash, __entry->count, __entry->status)
);
#endif /* _NFSD_TRACE_H */
#undef TRACE_INCLUDE_PATH