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lockd: refactor SM_MON mon_name argument encoder 

Clean up: introduce a new XDR encoder specifically for the mon_name
argument of SM_MON requests.  This will be updated later to support IPv6
addresses in addition to IPv4 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 14:25:39 -04:00 committed by Trond Myklebust
parent 099bd05f27
commit 4969517431
1 changed files with 25 additions and 0 deletions
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25
fs/lockd/mon.c
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@ -18,6 +18,8 @@
#define NLMDBG_FACILITY NLMDBG_MONITOR
#define XDR_ADDRBUF_LEN (20)
static struct rpc_clnt * nsm_create(void);
static struct rpc_program nsm_program;
@ -158,6 +160,29 @@ static __be32 *xdr_encode_nsm_string(__be32 *p, char *string)
return xdr_encode_opaque(p, string, len);
}
/*
* "mon_name" specifies the host to be monitored.
*
* Linux uses a text version of the IP address of the remote
* host as the host identifier (the "mon_name" argument).
*
* Linux statd always looks up the canonical hostname first for
* whatever remote hostname it receives, so this works alright.
*/
static __be32 *xdr_encode_mon_name(__be32 *p, struct nsm_args *argp)
{
char buffer[XDR_ADDRBUF_LEN + 1];
char *name = argp->mon_name;
if (!nsm_use_hostnames) {
snprintf(buffer, XDR_ADDRBUF_LEN,
NIPQUAD_FMT, NIPQUAD(argp->addr));
name = buffer;
}
return xdr_encode_nsm_string(p, name);
}
static __be32 *
xdr_encode_common(struct rpc_rqst *rqstp, __be32 *p, struct nsm_args *argp)
{