Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 246 insertions, 0 deletions

diff --git a/fs/lockd/mon.c b/fs/lockd/mon.c
new file mode 100644
index 000000000000..6fc1bebeec1d
--- /dev/null
+++ b/fs/lockd/mon.c
@@ -0,0 +1,246 @@
+/*
+ * linux/fs/lockd/mon.c
+ *
+ * The kernel statd client.
+ *
+ * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
+ */
+
+#include <linux/types.h>
+#include <linux/utsname.h>
+#include <linux/kernel.h>
+#include <linux/sunrpc/clnt.h>
+#include <linux/sunrpc/svc.h>
+#include <linux/lockd/lockd.h>
+#include <linux/lockd/sm_inter.h>
+
+
+#define NLMDBG_FACILITY		NLMDBG_MONITOR
+
+static struct rpc_clnt *	nsm_create(void);
+
+static struct rpc_program	nsm_program;
+
+/*
+ * Local NSM state
+ */
+u32				nsm_local_state;
+
+/*
+ * Common procedure for SM_MON/SM_UNMON calls
+ */
+static int
+nsm_mon_unmon(struct nlm_host *host, u32 proc, struct nsm_res *res)
+{
+	struct rpc_clnt	*clnt;
+	int		status;
+	struct nsm_args	args;
+
+	clnt = nsm_create();
+	if (IS_ERR(clnt)) {
+		status = PTR_ERR(clnt);
+		goto out;
+	}
+
+	args.addr = host->h_addr.sin_addr.s_addr;
+	args.proto= (host->h_proto<<1) | host->h_server;
+	args.prog = NLM_PROGRAM;
+	args.vers = host->h_version;
+	args.proc = NLMPROC_NSM_NOTIFY;
+	memset(res, 0, sizeof(*res));
+
+	status = rpc_call(clnt, proc, &args, res, 0);
+	if (status < 0)
+		printk(KERN_DEBUG "nsm_mon_unmon: rpc failed, status=%d\n",
+			status);
+	else
+		status = 0;
+ out:
+	return status;
+}
+
+/*
+ * Set up monitoring of a remote host
+ */
+int
+nsm_monitor(struct nlm_host *host)
+{
+	struct nsm_res	res;
+	int		status;
+
+	dprintk("lockd: nsm_monitor(%s)\n", host->h_name);
+
+	status = nsm_mon_unmon(host, SM_MON, &res);
+
+	if (status < 0 || res.status != 0)
+		printk(KERN_NOTICE "lockd: cannot monitor %s\n", host->h_name);
+	else
+		host->h_monitored = 1;
+	return status;
+}
+
+/*
+ * Cease to monitor remote host
+ */
+int
+nsm_unmonitor(struct nlm_host *host)
+{
+	struct nsm_res	res;
+	int		status;
+
+	dprintk("lockd: nsm_unmonitor(%s)\n", host->h_name);
+
+	status = nsm_mon_unmon(host, SM_UNMON, &res);
+	if (status < 0)
+		printk(KERN_NOTICE "lockd: cannot unmonitor %s\n", host->h_name);
+	else
+		host->h_monitored = 0;
+	return status;
+}
+
+/*
+ * Create NSM client for the local host
+ */
+static struct rpc_clnt *
+nsm_create(void)
+{
+	struct rpc_xprt		*xprt;
+	struct rpc_clnt		*clnt;
+	struct sockaddr_in	sin;
+
+	sin.sin_family = AF_INET;
+	sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+	sin.sin_port = 0;
+
+	xprt = xprt_create_proto(IPPROTO_UDP, &sin, NULL);
+	if (IS_ERR(xprt))
+		return (struct rpc_clnt *)xprt;
+
+	clnt = rpc_create_client(xprt, "localhost",
+				&nsm_program, SM_VERSION,
+				RPC_AUTH_NULL);
+	if (IS_ERR(clnt))
+		goto out_destroy;
+	clnt->cl_softrtry = 1;
+	clnt->cl_chatty   = 1;
+	clnt->cl_oneshot  = 1;
+	xprt->resvport = 1;	/* NSM requires a reserved port */
+	return clnt;
+
+out_destroy:
+	xprt_destroy(xprt);
+	return clnt;
+}
+
+/*
+ * XDR functions for NSM.
+ */
+
+static u32 *
+xdr_encode_common(struct rpc_rqst *rqstp, u32 *p, struct nsm_args *argp)
+{
+	char	buffer[20];
+
+	/*
+	 * 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.
+	 */
+	sprintf(buffer, "%u.%u.%u.%u", NIPQUAD(argp->addr));
+	if (!(p = xdr_encode_string(p, buffer))
+	 || !(p = xdr_encode_string(p, system_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, u32 *p, struct nsm_args *argp)
+{
+	p = xdr_encode_common(rqstp, p, argp);
+	if (IS_ERR(p))
+		return PTR_ERR(p);
+	*p++ = argp->addr;
+	*p++ = argp->vers;
+	*p++ = argp->proto;
+	*p++ = 0;
+	rqstp->rq_slen = xdr_adjust_iovec(rqstp->rq_svec, p);
+	return 0;
+}
+
+static int
+xdr_encode_unmon(struct rpc_rqst *rqstp, u32 *p, struct nsm_args *argp)
+{
+	p = xdr_encode_common(rqstp, p, argp);
+	if (IS_ERR(p))
+		return PTR_ERR(p);
+	rqstp->rq_slen = xdr_adjust_iovec(rqstp->rq_svec, p);
+	return 0;
+}
+
+static int
+xdr_decode_stat_res(struct rpc_rqst *rqstp, u32 *p, struct nsm_res *resp)
+{
+	resp->status = ntohl(*p++);
+	resp->state = ntohl(*p++);
+	dprintk("nsm: xdr_decode_stat_res status %d state %d\n",
+			resp->status, resp->state);
+	return 0;
+}
+
+static int
+xdr_decode_stat(struct rpc_rqst *rqstp, u32 *p, struct nsm_res *resp)
+{
+	resp->state = ntohl(*p++);
+	return 0;
+}
+
+#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_mon_sz	(SM_mon_id_sz+4)
+#define SM_monres_sz	2
+#define SM_unmonres_sz	1
+
+#ifndef MAX
+# define MAX(a, b)	(((a) > (b))? (a) : (b))
+#endif
+
+static struct rpc_procinfo	nsm_procedures[] = {
+[SM_MON] = {
+		.p_proc		= SM_MON,
+		.p_encode	= (kxdrproc_t) xdr_encode_mon,
+		.p_decode	= (kxdrproc_t) xdr_decode_stat_res,
+		.p_bufsiz	= MAX(SM_mon_sz, SM_monres_sz) << 2,
+	},
+[SM_UNMON] = {
+		.p_proc		= SM_UNMON,
+		.p_encode	= (kxdrproc_t) xdr_encode_unmon,
+		.p_decode	= (kxdrproc_t) xdr_decode_stat,
+		.p_bufsiz	= MAX(SM_mon_id_sz, SM_unmonres_sz) << 2,
+	},
+};
+
+static struct rpc_version	nsm_version1 = {
+		.number		= 1, 
+		.nrprocs	= sizeof(nsm_procedures)/sizeof(nsm_procedures[0]),
+		.procs		= nsm_procedures
+};
+
+static struct rpc_version *	nsm_version[] = {
+	[1] = &nsm_version1,
+};
+
+static struct rpc_stat		nsm_stats;
+
+static struct rpc_program	nsm_program = {
+		.name		= "statd",
+		.number		= SM_PROGRAM,
+		.nrvers		= sizeof(nsm_version)/sizeof(nsm_version[0]),
+		.version	= nsm_version,
+		.stats		= &nsm_stats
+};