nfsd41: error out when client sets maxreq_sz or maxresp_sz too small
authorMi Jinlong <mijinlong@cn.fujitsu.com>
Thu, 14 Jul 2011 06:50:17 +0000 (14:50 +0800)
committerJ. Bruce Fields <bfields@redhat.com>
Fri, 15 Jul 2011 22:58:51 +0000 (18:58 -0400)
commit1b74c25bc1a142ee8dd7ad080e2a974f28d1cb18
tree99da76bc4a03e876e9f84e3a85a83518c4aa9bf9
parentf197c27196a5e7631b89e2e92daa096fcf7c302c
nfsd41: error out when client sets maxreq_sz or maxresp_sz too small

According to RFC5661, 18.36.3,

 "if the client selects a value for ca_maxresponsesize such that
  a replier on a channel could never send a response,the server
  SHOULD return NFS4ERR_TOOSMALL in the CREATE_SESSION reply."

So, error out when the client sets a maxreq_sz less than the minimum
possible SEQUENCE request size, or sets a maxresp_sz less than the
minimum possible SEQUENCE reply size.

Signed-off-by: Mi Jinlong <mijinlong@cn.fujitsu.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
fs/nfsd/nfs4state.c