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nfsd: don't destroy clients that are busy

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It's possible that we'll have an in-progress call on some of the clients
while a rogue EXCHANGE_ID or DESTROY_CLIENTID call comes in. Be sure to
try and mark the client expired first, so that the refcount is
respected.

This will only be a problem once the client_mutex is removed.

Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Jeff Layton 2014-07-30 08:27:14 -04:00 committed by J. Bruce Fields
parent fb94d766af
commit fd699b8a48
1 changed files with 8 additions and 2 deletions
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10
fs/nfsd/nfs4state.c
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@ -2267,8 +2267,11 @@ nfsd4_exchange_id(struct svc_rqst *rqstp,
/* case 1 (normal case) */
out_new:
if (conf)
unhash_client_locked(conf);
if (conf) {
status = mark_client_expired_locked(conf);
if (status)
goto out;
}
new->cl_minorversion = cstate->minorversion;
new->cl_mach_cred = (exid->spa_how == SP4_MACH_CRED);
@ -2881,6 +2884,9 @@ nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *csta
status = nfserr_clientid_busy;
goto out;
}
status = mark_client_expired_locked(conf);
if (status)
goto out;
clp = conf;
} else if (unconf)
clp = unconf;