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lockd: introduce new function to encode private argument in SM_MON requests

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Clean up: refactor the encoding of the opaque 16-byte private argument in
xdr_encode_mon().  This will be updated later to support IPv6 addresses.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Chuck Lever 2008-03-14 14:26:08 -04:00 committed by Trond Myklebust
parent 2ca7754d4c
commit 0490a54a00
2 changed files with 25 additions and 6 deletions
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30
fs/lockd/mon.c
View file

@ -218,6 +218,24 @@ static __be32 *xdr_encode_mon_id(__be32 *p, struct nsm_args *argp)
return xdr_encode_my_id(p, argp);
}
/*
* The "priv" argument may contain private information required
* by the SM_MON call. This information will be supplied in the
* SM_NOTIFY call.
*
* Linux provides the raw IP address of the monitored host,
* left in network byte order.
*/
static __be32 *xdr_encode_priv(__be32 *p, struct nsm_args *argp)
{
*p++ = argp->addr;
*p++ = 0;
*p++ = 0;
*p++ = 0;
return p;
}
static int
xdr_encode_mon(struct rpc_rqst *rqstp, __be32 *p, struct nsm_args *argp)
{
@ -225,11 +243,10 @@ xdr_encode_mon(struct rpc_rqst *rqstp, __be32 *p, struct nsm_args *argp)
if (IS_ERR(p))
return PTR_ERR(p);
/* Surprise - there may even be room for an IPv6 address now */
*p++ = argp->addr;
*p++ = 0;
*p++ = 0;
*p++ = 0;
p = xdr_encode_priv(p, argp);
if (IS_ERR(p))
return PTR_ERR(p);
rqstp->rq_slen = xdr_adjust_iovec(rqstp->rq_svec, p);
return 0;
}
@ -265,7 +282,8 @@ xdr_decode_stat(struct rpc_rqst *rqstp, __be32 *p, struct nsm_res *resp)
#define SM_my_id_sz (SM_my_name_sz+3)
#define SM_mon_name_sz (1+XDR_QUADLEN(SM_MAXSTRLEN))
#define SM_mon_id_sz (SM_mon_name_sz+SM_my_id_sz)
#define SM_mon_sz (SM_mon_id_sz+4)
#define SM_priv_sz (XDR_QUADLEN(SM_PRIV_SIZE))
#define SM_mon_sz (SM_mon_id_sz+SM_priv_sz)
#define SM_monres_sz 2
#define SM_unmonres_sz 1

1
include/linux/lockd/sm_inter.h
View file

@ -19,6 +19,7 @@
#define SM_NOTIFY 6
#define SM_MAXSTRLEN 1024
#define SM_PRIV_SIZE 16
/*
* Arguments for all calls to statd