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| author | J. Bruce Fields <bfields@redhat.com> | 2012-05-12 21:32:30 -0400 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2012-05-31 20:29:52 -0400 |
| commit | 1a308118c238c5aa0af3d303b42fa6bbee279394 (patch) | |
| tree | 96998e1b4bfe4577846102d83df17f2482d3fc99 | |
| parent | ea236d0704b9b9e7742b107313bbdddbba62724a (diff) | |
| download | linux-3.10-1a308118c238c5aa0af3d303b42fa6bbee279394.tar.gz linux-3.10-1a308118c238c5aa0af3d303b42fa6bbee279394.tar.bz2 linux-3.10-1a308118c238c5aa0af3d303b42fa6bbee279394.zip | |
nfsd4: allow an EXCHANGE_ID to kill a 4.0 client
Following rfc 5661 section 2.4.1, we can permit a 4.1 client to remove
an established 4.0 client's state.
(But we don't allow updates.)
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| -rw-r--r-- | fs/nfsd/nfs4state.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index f372a6edef3..c88f5c103e8 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -1553,8 +1553,10 @@ nfsd4_exchange_id(struct svc_rqst *rqstp, conf = find_confirmed_client_by_str(dname, strhashval); if (conf) { if (!clp_used_exchangeid(conf)) { - status = nfserr_clid_inuse; /* XXX: ? */ - goto out; + if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { + status = nfserr_inval; /* buggy client */ + goto out; + } } if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { /* 18.35.4 case 9 */ @@ -1574,6 +1576,10 @@ nfsd4_exchange_id(struct svc_rqst *rqstp, expire_client(conf); goto out_new; } + if (!clp_used_exchangeid(conf)) { + status = nfserr_inval; + goto out; + } /* * Set bit when the owner id and verifier map to an already * confirmed client id (18.35.3). |