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>
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 0b33165..87c584d 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -5287,6 +5287,8 @@
return -EINVAL;
if (rcvd->max_reqs == 0)
return -EINVAL;
+ if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
+ rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
return 0;
}
@@ -5302,9 +5304,9 @@
if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
return -EINVAL;
/* These would render the backchannel useless: */
- if (rcvd->max_ops == 0)
+ if (rcvd->max_ops != sent->max_ops)
return -EINVAL;
- if (rcvd->max_reqs == 0)
+ if (rcvd->max_reqs != sent->max_reqs)
return -EINVAL;
return 0;
}