If a delegation has been revoked by the server, operations using that delegation should error out with NFS4ERR_DELEG_REVOKED in the >4.1 case, and NFS4ERR_BAD_STATEID otherwise. DELEGRETURN has also been optimized to return NFS4_OK when called with a revoked delegation. Thread on DELEGRETURN optimization is here: https://www.spinics.net/lists/linux-nfs/msg55216.html Signed-off-by: Andrew Elble <aweits@xxxxxxx> --- fs/nfsd/nfs4state.c | 53 +++++++++++++++++++++++++++++++++++++++++++---------- 1 file changed, 43 insertions(+), 10 deletions(-) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 0c04f81aa63b..2545ca69a6b5 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -3966,7 +3966,8 @@ static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, statei { struct nfs4_stid *ret; - ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); + ret = find_stateid_by_type(cl, s, + NFS4_DELEG_STID|NFS4_REVOKED_DELEG_STID); if (!ret) return NULL; return delegstateid(ret); @@ -3989,6 +3990,12 @@ nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, deleg = find_deleg_stateid(cl, &open->op_delegate_stateid); if (deleg == NULL) goto out; + if (deleg->dl_stid.sc_type == NFS4_REVOKED_DELEG_STID) { + nfs4_put_stid(&deleg->dl_stid); + if (cl->cl_minorversion) + status = nfserr_deleg_revoked; + goto out; + } flags = share_access_to_flags(open->op_share_access); status = nfs4_check_delegmode(deleg, flags); if (status) { @@ -4858,6 +4865,16 @@ nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, struct nfs4_stid **s, struct nfsd_net *nn) { __be32 status; + bool return_revoked = false; + + /* + * only return revoked delegations if explicitly asked. + * otherwise we report revoked or bad_stateid status. + */ + if (typemask & NFS4_REVOKED_DELEG_STID) + return_revoked = true; + else if (typemask & NFS4_DELEG_STID) + typemask |= NFS4_REVOKED_DELEG_STID; if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) return nfserr_bad_stateid; @@ -4872,6 +4889,12 @@ nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, *s = find_stateid_by_type(cstate->clp, stateid, typemask); if (!*s) return nfserr_bad_stateid; + if (((*s)->sc_type == NFS4_REVOKED_DELEG_STID) && !return_revoked) { + nfs4_put_stid(*s); + if (cstate->minorversion) + return nfserr_deleg_revoked; + return nfserr_bad_stateid; + } return nfs_ok; } @@ -5106,13 +5129,11 @@ static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_ status = nfsd4_check_seqid(cstate, sop, seqid); if (status) return status; - if (stp->st_stid.sc_type == NFS4_CLOSED_STID - || stp->st_stid.sc_type == NFS4_REVOKED_DELEG_STID) - /* - * "Closed" stateid's exist *only* to return - * nfserr_replay_me from the previous step, and - * revoked delegations are kept only for free_stateid. - */ + /* + * "Closed" stateid's exist *only* to return + * nfserr_replay_me from the previous step + */ + if (stp->st_stid.sc_type == NFS4_CLOSED_STID) return nfserr_bad_stateid; mutex_lock(&stp->st_mutex); status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); @@ -5359,7 +5380,9 @@ nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) return status; - status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn); + status = nfsd4_lookup_stateid(cstate, stateid, + NFS4_DELEG_STID|NFS4_REVOKED_DELEG_STID, + &s, nn); if (status) goto out; dp = delegstateid(s); @@ -5367,7 +5390,17 @@ nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, if (status) goto put_stateid; - destroy_delegation(dp); + if (dp->dl_stid.sc_type == NFS4_DELEG_STID) + destroy_delegation(dp); + if (dp->dl_stid.sc_type == NFS4_REVOKED_DELEG_STID) { + /* + * optimization: don't return error if client is + * returning a revoked delegation + */ + list_del_init(&dp->dl_recall_lru); + nfs4_put_stid(s); + } + put_stateid: nfs4_put_stid(&dp->dl_stid); out: -- 2.10.1 -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
