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[src/trunk]: src/sys/modules/examples Import new example kernel module ping_b...
details: https://anonhg.NetBSD.org/src/rev/5fe5f814d059
branches: trunk
changeset: 848668:5fe5f814d059
user: kamil <kamil%NetBSD.org@localhost>
date: Wed Feb 05 13:23:42 2020 +0000
description:
Import new example kernel module ping_block
Subbmitted by Nisarg Joshi.
diffstat:
sys/modules/examples/Makefile | 3 +-
sys/modules/examples/README | 5 +-
sys/modules/examples/ping_block/Makefile | 18 +++
sys/modules/examples/ping_block/cmd_ping.c | 61 ++++++++++++
sys/modules/examples/ping_block/ping.c | 139 +++++++++++++++++++++++++++++
sys/modules/examples/ping_block/ping.h | 8 +
6 files changed, 232 insertions(+), 2 deletions(-)
diffs (278 lines):
diff -r 4c4f3da3615e -r 5fe5f814d059 sys/modules/examples/Makefile
--- a/sys/modules/examples/Makefile Wed Feb 05 13:08:19 2020 +0000
+++ b/sys/modules/examples/Makefile Wed Feb 05 13:23:42 2020 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.7 2019/01/17 20:47:42 kamil Exp $
+# $NetBSD: Makefile,v 1.8 2020/02/05 13:23:42 kamil Exp $
.include <bsd.own.mk>
@@ -9,6 +9,7 @@
SUBDIR+= mapper # Needs an additional helper program
SUBDIR+= panic_string # Crashes the system
SUBDIR+= ping # Needs an additional helper program
+SUBDIR+= ping_block # Needs an additional helper program
SUBDIR+= properties
SUBDIR+= readhappy
SUBDIR+= readhappy_mpsafe # Contains an additional helper program
diff -r 4c4f3da3615e -r 5fe5f814d059 sys/modules/examples/README
--- a/sys/modules/examples/README Wed Feb 05 13:08:19 2020 +0000
+++ b/sys/modules/examples/README Wed Feb 05 13:23:42 2020 +0000
@@ -1,4 +1,4 @@
- $NetBSD: README,v 1.9 2019/01/17 20:47:42 kamil Exp $
+ $NetBSD: README,v 1.10 2020/02/05 13:23:42 kamil Exp $
Kernel Developer's Manual
@@ -69,6 +69,9 @@
The mapper module first appeared in NetBSD 9.0 and was authored by
Akul Pillai.
+
+ The ping_block module first appeared in NetBSD 10.0 and was authored by
+ Nisarg Joshi.
AUTHORS
This document was written by Kamil Rytarowski.
diff -r 4c4f3da3615e -r 5fe5f814d059 sys/modules/examples/ping_block/Makefile
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/modules/examples/ping_block/Makefile Wed Feb 05 13:23:42 2020 +0000
@@ -0,0 +1,18 @@
+# $NetBSD: Makefile,v 1.1 2020/02/05 13:23:42 kamil Exp $
+
+.include "../Makefile.inc"
+
+#S?= /usr/src/sys
+
+KMOD= ping_block
+SRCS= ping.c
+
+.include <bsd.kmodule.mk>
+
+# To make use of this module, you'll need to separately build the
+# cmd_ping program, with a Makefile similar to
+#
+# MKMAN= NO
+# PROG= cmd_ping
+# .include <bsd.prog.mk>
+
diff -r 4c4f3da3615e -r 5fe5f814d059 sys/modules/examples/ping_block/cmd_ping.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/modules/examples/ping_block/cmd_ping.c Wed Feb 05 13:23:42 2020 +0000
@@ -0,0 +1,61 @@
+/* $NetBSD: cmd_ping.c,v 1.1 2020/02/05 13:23:42 kamil Exp $ */
+
+/*-
+ * Copyright (c) 2015 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__RCSID("$NetBSD: cmd_ping.c,v 1.1 2020/02/05 13:23:42 kamil Exp $");
+
+#include <err.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/ioctl.h>
+#include <unistd.h>
+
+#include "ping.h"
+
+#define _PATH_DEV_PING "/dev/ping"
+
+int main(int argc, char **argv)
+{
+ int devfd;
+
+ setprogname(argv[0]);
+
+ if ((devfd = open(_PATH_DEV_PING, O_RDWR)) == -1)
+ err(EXIT_FAILURE, "Cannot open %s", _PATH_DEV_PING);
+
+ if (ioctl(devfd, CMD_PING) == -1)
+ err(EXIT_FAILURE, "ping failed");
+
+ printf("%s: ping sent successfully\n", getprogname());
+
+ if (close(devfd) == -1)
+ err(EXIT_FAILURE, "Cannot close %s", _PATH_DEV_PING);
+
+ return EXIT_SUCCESS;
+}
diff -r 4c4f3da3615e -r 5fe5f814d059 sys/modules/examples/ping_block/ping.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/modules/examples/ping_block/ping.c Wed Feb 05 13:23:42 2020 +0000
@@ -0,0 +1,139 @@
+/* $NetBSD: ping.c,v 1.1 2020/02/05 13:23:42 kamil Exp $ */
+
+/*-
+ * Copyright (c) 2020 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: ping.c,v 1.1 2020/02/05 13:23:42 kamil Exp $");
+
+#include <sys/param.h>
+#include <sys/conf.h>
+#include <sys/device.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+
+#include "ping.h"
+
+/*
+ * Create a device /dev/ping in order to test this module.
+ *
+ * To use this device you need to do:
+ * mknod /dev/ping b 351 0
+ *
+ */
+
+dev_type_open(ping_open);
+dev_type_close(ping_close);
+dev_type_ioctl(ping_ioctl);
+
+static struct cdevsw ping_cdevsw = {
+ .d_open = noopen,
+ .d_close = noclose,
+ .d_read = noread,
+ .d_write = nowrite,
+ .d_ioctl = noioctl,
+ .d_stop = nostop,
+ .d_tty = notty,
+ .d_poll = nopoll,
+ .d_mmap = nommap,
+ .d_kqfilter = nokqfilter,
+ .d_discard = nodiscard,
+ .d_flag = D_OTHER
+};
+
+static struct bdevsw ping_bdevsw = {
+ .d_open = ping_open,
+ .d_close = ping_close,
+ .d_strategy = NULL,
+ .d_ioctl = ping_ioctl,
+ .d_dump = nodump,
+ .d_psize = nosize,
+ .d_discard = nodiscard,
+ .d_flag = D_OTHER
+};
+
+struct ping_softc {
+ int refcnt;
+};
+
+static struct ping_softc sc;
+
+int
+ping_open(dev_t self __unused, int flag __unused, int mode __unused,
+ struct lwp *l __unused)
+{
+ if (sc.refcnt > 0)
+ return EBUSY;
+
+ ++sc.refcnt;
+
+ return 0;
+}
+
+int
+ping_close(dev_t self __unused, int flag __unused, int mode __unused,
+ struct lwp *l __unused)
+{
+ --sc.refcnt;
+
+ return 0;
+}
+
+int
+ping_ioctl(dev_t self __unused, u_long cmd, void *data, int flag,
+ struct lwp *l __unused)
+{
+ switch(cmd) {
+ case CMD_PING:
+ printf("ping: pong!\n");
+ return 0;
+ default:
+ return 1;
+ }
+}
+
+MODULE(MODULE_CLASS_MISC, ping, NULL);
+
+static int
+ping_modcmd(modcmd_t cmd, void *arg __unused)
+{
+ int bmajor = 351, cmajor = -1;
+
+ switch (cmd) {
+ case MODULE_CMD_INIT:
+ if (devsw_attach("ping", &ping_bdevsw, &bmajor, &ping_cdevsw, &cmajor))
+ return ENXIO;
+ return 0;
+ case MODULE_CMD_FINI:
+ if (sc.refcnt > 0)
+ return EBUSY;
+
+ devsw_detach(&ping_bdevsw, &ping_cdevsw);
+ return 0;
+ default:
+ return ENOTTY;
+ }
+}
diff -r 4c4f3da3615e -r 5fe5f814d059 sys/modules/examples/ping_block/ping.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/modules/examples/ping_block/ping.h Wed Feb 05 13:23:42 2020 +0000
@@ -0,0 +1,8 @@
+#ifndef _PING_H_
+#define _PING_H_
+
+#include <sys/ioccom.h>
+
+#define CMD_PING _IO('p', 2)
+
+#endif /* _PING_H_ */
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