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nfsd4: check backchannel attributes on create_session

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Make sure the client gives us an adequate backchannel.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
J. Bruce Fields 2013-04-09 11:34:36 -04:00
parent 55c760cfc4
commit 06b332a522
4 changed files with 52 additions and 24 deletions
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25
fs/nfsd/nfs4callback.c
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@ -37,6 +37,7 @@
#include "nfsd.h"
#include "state.h"
#include "netns.h"
#include "xdr4cb.h"
#define NFSDDBG_FACILITY NFSDDBG_PROC
@ -53,30 +54,6 @@ enum {
NFSPROC4_CLNT_CB_SEQUENCE,
};
#define NFS4_MAXTAGLEN 20
#define NFS4_enc_cb_null_sz 0
#define NFS4_dec_cb_null_sz 0
#define cb_compound_enc_hdr_sz 4
#define cb_compound_dec_hdr_sz (3 + (NFS4_MAXTAGLEN >> 2))
#define sessionid_sz (NFS4_MAX_SESSIONID_LEN >> 2)
#define cb_sequence_enc_sz (sessionid_sz + 4 + \
1 /* no referring calls list yet */)
#define cb_sequence_dec_sz (op_dec_sz + sessionid_sz + 4)
#define op_enc_sz 1
#define op_dec_sz 2
#define enc_nfs4_fh_sz (1 + (NFS4_FHSIZE >> 2))
#define enc_stateid_sz (NFS4_STATEID_SIZE >> 2)
#define NFS4_enc_cb_recall_sz (cb_compound_enc_hdr_sz + \
cb_sequence_enc_sz + \
1 + enc_stateid_sz + \
enc_nfs4_fh_sz)
#define NFS4_dec_cb_recall_sz (cb_compound_dec_hdr_sz + \
cb_sequence_dec_sz + \
op_dec_sz)
struct nfs4_cb_compound_hdr {
/* args */
u32 ident; /* minorversion 0 only */