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nfs41: Verify channel's attributes accordingly to RFC v2 

ca_maxoperations:

      For the backchannel, the server MUST
      NOT change the value the client offers.  For the fore channel,
      the server MAY change the requested value.

  ca_maxrequests:

       For the backchannel, the server MUST NOT change the
       value the client offers.  For the fore channel, the server MAY
       change the requested value.

Signed-off-by: Vitaliy Gusev <gusev.vitaliy@nexenta.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Vitaliy Gusev 2012-02-15 19:38:25 +04:00 committed by Trond Myklebust
parent 571b755401
commit b4b9a0c1c8
1 changed files with 4 additions and 2 deletions
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6
fs/nfs/nfs4proc.c
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@ -5287,6 +5287,8 @@ static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args
return -EINVAL; return -EINVAL;
if (rcvd->max_reqs == 0) if (rcvd->max_reqs == 0)
return -EINVAL; return -EINVAL;
if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
return 0; return 0;
} }
@ -5302,9 +5304,9 @@ static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args
if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached) if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
return -EINVAL; return -EINVAL;
/* These would render the backchannel useless: */ /* These would render the backchannel useless: */
if (rcvd->max_ops == 0) if (rcvd->max_ops != sent->max_ops)
return -EINVAL; return -EINVAL;
if (rcvd->max_reqs == 0) if (rcvd->max_reqs != sent->max_reqs)
return -EINVAL; return -EINVAL;
return 0; return 0;
} }