diff options
| author | Chuck Lever <chuck.lever@oracle.com> | 2021-05-14 15:55:36 -0400 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2021-05-18 13:44:03 -0400 |
| commit | 744ea54c869cebe41fbad5f53f8a8ca5d93a5c97 (patch) | |
| tree | adb7fc452412189acacde5ae3c77fe6c5fb44d81 | |
| parent | 27787733ef44332fce749aa853f2749d141982b0 (diff) | |
NFSD: Add nfsd_clid_verf_mismatch tracepoint
Record when a client presents a different boot verifier than the
one we know about. Typically this is a sign the client has
rebooted, but sometimes it signals a conflicting client ID, which
the client's administrator will need to address.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| -rw-r--r-- | fs/nfsd/nfs4state.c | 11 | ||||
| -rw-r--r-- | fs/nfsd/trace.h | 32 |
2 files changed, 40 insertions, 3 deletions
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 84c4021b3826..69405cc9d823 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -3191,6 +3191,7 @@ nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, goto out_copy; } /* case 5, client reboot */ + trace_nfsd_clid_verf_mismatch(conf, rqstp, &verf); conf = NULL; goto out_new; } @@ -3986,9 +3987,13 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, if (unconf) unhash_client_locked(unconf); /* We need to handle only case 1: probable callback update */ - if (conf && same_verf(&conf->cl_verifier, &clverifier)) { - copy_clid(new, conf); - gen_confirm(new, nn); + if (conf) { + if (same_verf(&conf->cl_verifier, &clverifier)) { + copy_clid(new, conf); + gen_confirm(new, nn); + } else + trace_nfsd_clid_verf_mismatch(conf, rqstp, + &clverifier); } new->cl_minorversion = 0; gen_callback(new, setclid, rqstp); diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h index 820a542e1013..24f54ab20eed 100644 --- a/fs/nfsd/trace.h +++ b/fs/nfsd/trace.h @@ -564,6 +564,38 @@ TRACE_EVENT(nfsd_clid_cred_mismatch, ) ) +TRACE_EVENT(nfsd_clid_verf_mismatch, + TP_PROTO( + const struct nfs4_client *clp, + const struct svc_rqst *rqstp, + const nfs4_verifier *verf + ), + TP_ARGS(clp, rqstp, verf), + TP_STRUCT__entry( + __field(u32, cl_boot) + __field(u32, cl_id) + __array(unsigned char, cl_verifier, NFS4_VERIFIER_SIZE) + __array(unsigned char, new_verifier, NFS4_VERIFIER_SIZE) + __array(unsigned char, addr, sizeof(struct sockaddr_in6)) + ), + TP_fast_assign( + __entry->cl_boot = clp->cl_clientid.cl_boot; + __entry->cl_id = clp->cl_clientid.cl_id; + memcpy(__entry->cl_verifier, (void *)&clp->cl_verifier, + NFS4_VERIFIER_SIZE); + memcpy(__entry->new_verifier, (void *)verf, + NFS4_VERIFIER_SIZE); + memcpy(__entry->addr, &rqstp->rq_xprt->xpt_remote, + sizeof(struct sockaddr_in6)); + ), + TP_printk("client %08x:%08x verf=0x%s, updated=0x%s from addr=%pISpc", + __entry->cl_boot, __entry->cl_id, + __print_hex_str(__entry->cl_verifier, NFS4_VERIFIER_SIZE), + __print_hex_str(__entry->new_verifier, NFS4_VERIFIER_SIZE), + __entry->addr + ) +); + TRACE_EVENT(nfsd_clid_inuse_err, TP_PROTO(const struct nfs4_client *clp), TP_ARGS(clp), |