Re: [PATCH 3/4] nfs-utils: add statdb_dump utility

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On Jan 6, 2010, at 7:53 AM, Jeff Layton wrote:

To dump contents of statd's monitor DB.

Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
---
tests/Makefile.am   |    6 +++
tests/statdb_dump.c | 98 ++++++++++++++++++++++++++++++++++++++++++ +++++++++
2 files changed, 104 insertions(+), 0 deletions(-)
create mode 100644 tests/statdb_dump.c

diff --git a/tests/Makefile.am b/tests/Makefile.am
index 375af80..a20b42b 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -1,5 +1,11 @@
## Process this file with automake to produce Makefile.in

+check_PROGRAMS = statdb_dump
+statdb_dump_SOURCES = statdb_dump.c
+
+statdb_dump_LDADD = ../support/nfs/libnfs.a \
+		    ../support/nsm/libnsm.a $(LIBCAP)
+
SUBDIRS = nsm_client

MAINTAINERCLEANFILES = Makefile.in
diff --git a/tests/statdb_dump.c b/tests/statdb_dump.c
new file mode 100644
index 0000000..a891bd7
--- /dev/null
+++ b/tests/statdb_dump.c
@@ -0,0 +1,98 @@
+/*
+ * statdb_dump.c -- dump contents of statd's monitor DB
+ *
+ * Copyright (C) 2010  Red Hat, Jeff Layton <jlayton@xxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <sys/socket.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <errno.h>
+
+#include "nsm.h"
+#include "xlog.h"
+
+static char cookiebuf[(SM_PRIV_SIZE * 2) + 1];
+static char addrbuf[INET6_ADDRSTRLEN + 1];
+
+static unsigned int
+dump_host(const char *hostname, const struct sockaddr *sa, const struct mon *m,
+	  const time_t timestamp)
+{
+	int ret;
+	socklen_t salen;
+
+	ret = nsm_priv_to_hex(m->priv, cookiebuf, sizeof(cookiebuf));
+	if (!ret) {
+		xlog(L_ERROR, "Unable to convert cookie to hex string.\n");
+		return ret;
+	}
+
+	switch (sa->sa_family) {
+	case AF_INET:
+		salen = sizeof(struct sockaddr_in);
+		break;
+	case AF_INET6:
+		salen = sizeof(struct sockaddr_in6);
+		break;
+	default:
+		xlog(L_ERROR, "Unrecognized address family: %hu\n",
+			sa->sa_family);
+		return 0;
+	}
+
+	ret = getnameinfo(sa, salen, addrbuf, sizeof(addrbuf), NULL, 0,
+			  NI_NUMERICHOST);

getnameinfo(3) isn't available in older versions of glibc. Usually this needs to be wrapped in #if HAVE_GETNAMEINFO, and an alternate version provided for when getnameinfo(3) isn't available.

I think you can safely use inet_ntop(3) in all cases here.

+
+	if (ret) {
+		xlog(L_ERROR, "Unable to convert address to string: %s",
+			ret == EAI_SYSTEM ? strerror(errno) :
+				gai_strerror(ret));
+		return 0;
+	}
+
+	/*
+	 * Callers of this program should assume that in the future, extra
+	 * fields may be added to the output. Anyone adding extra fields to
+	 * the output should add them to the end of the line.
+	 */
+	printf("%s %s %s %s %s %d %d %d\n",
+			hostname, addrbuf, cookiebuf,
+			m->mon_id.mon_name,
+			m->mon_id.my_id.my_name,
+			m->mon_id.my_id.my_prog,
+			m->mon_id.my_id.my_vers,
+			m->mon_id.my_id.my_proc);
+
+	return 1;
+}
+
+int
+main(int argc, char **argv)
+{
+	xlog_syslog(0);
+	xlog_stderr(1);
+	xlog_open(argv[0]);
+	
+	nsm_load_monitor_list(dump_host);
+	return 0;
+}
--
1.6.5.2


--
Chuck Lever
chuck[dot]lever[at]oracle[dot]com



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