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lockd: Fix up incorrect RPC buffer size calculations. 

Switch to using the new mon_id encoder function.

Now that we've refactored the encoding of SM_MON requests, we've
discovered that the pre-computed buffer length maximums are
incorrect!

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 14:26:01 -04:00 committed by Trond Myklebust
parent ea72a7f170
commit 2ca7754d4c
1 changed files with 8 additions and 31 deletions
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39
fs/lockd/mon.c
View File

@ -149,6 +149,9 @@ nsm_create(void)
/*
* XDR functions for NSM.
*
* See http://www.opengroup.org/ for details on the Network
* Status Monitor wire protocol.
*/
static __be32 *xdr_encode_nsm_string(__be32 *p, char *string)
@ -215,37 +218,10 @@ static __be32 *xdr_encode_mon_id(__be32 *p, struct nsm_args *argp)
return xdr_encode_my_id(p, argp);
}
static __be32 *
xdr_encode_common(struct rpc_rqst *rqstp, __be32 *p, struct nsm_args *argp)
{
char buffer[20], *name;
/*
* Use the dotted-quad IP address of the remote host as
* identifier. Linux statd always looks up the canonical
* hostname first for whatever remote hostname it receives,
* so this works alright.
*/
if (nsm_use_hostnames) {
name = argp->mon_name;
} else {
sprintf(buffer, "%u.%u.%u.%u", NIPQUAD(argp->addr));
name = buffer;
}
if (!(p = xdr_encode_string(p, name))
|| !(p = xdr_encode_string(p, utsname()->nodename)))
return ERR_PTR(-EIO);
*p++ = htonl(argp->prog);
*p++ = htonl(argp->vers);
*p++ = htonl(argp->proc);
return p;
}
static int
xdr_encode_mon(struct rpc_rqst *rqstp, __be32 *p, struct nsm_args *argp)
{
p = xdr_encode_common(rqstp, p, argp);
p = xdr_encode_mon_id(p, argp);
if (IS_ERR(p))
return PTR_ERR(p);
@ -261,7 +237,7 @@ xdr_encode_mon(struct rpc_rqst *rqstp, __be32 *p, struct nsm_args *argp)
static int
xdr_encode_unmon(struct rpc_rqst *rqstp, __be32 *p, struct nsm_args *argp)
{
p = xdr_encode_common(rqstp, p, argp);
p = xdr_encode_mon_id(p, argp);
if (IS_ERR(p))
return PTR_ERR(p);
rqstp->rq_slen = xdr_adjust_iovec(rqstp->rq_svec, p);
@ -286,8 +262,9 @@ xdr_decode_stat(struct rpc_rqst *rqstp, __be32 *p, struct nsm_res *resp)
}
#define SM_my_name_sz (1+XDR_QUADLEN(SM_MAXSTRLEN))
#define SM_my_id_sz (3+1+SM_my_name_sz)
#define SM_mon_id_sz (1+XDR_QUADLEN(20)+SM_my_id_sz)
#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_monres_sz 2
#define SM_unmonres_sz 1