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authorChuck Lever <chuck.lever@oracle.com>2008-03-14 14:25:39 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2008-03-19 18:00:57 -0400
commit496951743100b2d2ccd8b268257e79425e489851 (patch)
treee52e804c132f8322699354640c7fee7541b9a317 /fs/lockd
parent099bd05f27ff24a3041d54e7ed42d2eb681484b9 (diff)
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>
Diffstat (limited to 'fs/lockd')
-rw-r--r--fs/lockd/mon.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/fs/lockd/mon.c b/fs/lockd/mon.c
index 84fd84cb67b..87bd4e4d65d 100644
--- a/fs/lockd/mon.c
+++ b/fs/lockd/mon.c
@@ -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)
{