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Based on 1 normalized pattern(s): 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 59 temple place suite 330 boston ma 02111 1307 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1334 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
189 lines
3.9 KiB
C
189 lines
3.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* cn_test.c
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*
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* 2004+ Copyright (c) Evgeniy Polyakov <zbr@ioremap.net>
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* All rights reserved.
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*/
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#define pr_fmt(fmt) "cn_test: " fmt
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/skbuff.h>
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#include <linux/slab.h>
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#include <linux/timer.h>
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#include <linux/connector.h>
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static struct cb_id cn_test_id = { CN_NETLINK_USERS + 3, 0x456 };
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static char cn_test_name[] = "cn_test";
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static struct sock *nls;
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static struct timer_list cn_test_timer;
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static void cn_test_callback(struct cn_msg *msg, struct netlink_skb_parms *nsp)
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{
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pr_info("%s: %lu: idx=%x, val=%x, seq=%u, ack=%u, len=%d: %s.\n",
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__func__, jiffies, msg->id.idx, msg->id.val,
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msg->seq, msg->ack, msg->len,
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msg->len ? (char *)msg->data : "");
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}
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/*
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* Do not remove this function even if no one is using it as
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* this is an example of how to get notifications about new
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* connector user registration
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*/
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#if 0
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static int cn_test_want_notify(void)
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{
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struct cn_ctl_msg *ctl;
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struct cn_notify_req *req;
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struct cn_msg *msg = NULL;
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int size, size0;
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struct sk_buff *skb;
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struct nlmsghdr *nlh;
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u32 group = 1;
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size0 = sizeof(*msg) + sizeof(*ctl) + 3 * sizeof(*req);
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size = NLMSG_SPACE(size0);
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skb = alloc_skb(size, GFP_ATOMIC);
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if (!skb) {
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pr_err("failed to allocate new skb with size=%u\n", size);
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return -ENOMEM;
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}
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nlh = nlmsg_put(skb, 0, 0x123, NLMSG_DONE, size - sizeof(*nlh), 0);
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if (!nlh) {
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kfree_skb(skb);
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return -EMSGSIZE;
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}
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msg = nlmsg_data(nlh);
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memset(msg, 0, size0);
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msg->id.idx = -1;
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msg->id.val = -1;
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msg->seq = 0x123;
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msg->ack = 0x345;
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msg->len = size0 - sizeof(*msg);
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ctl = (struct cn_ctl_msg *)(msg + 1);
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ctl->idx_notify_num = 1;
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ctl->val_notify_num = 2;
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ctl->group = group;
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ctl->len = msg->len - sizeof(*ctl);
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req = (struct cn_notify_req *)(ctl + 1);
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/*
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* Idx.
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*/
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req->first = cn_test_id.idx;
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req->range = 10;
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/*
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* Val 0.
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*/
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req++;
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req->first = cn_test_id.val;
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req->range = 10;
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/*
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* Val 1.
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*/
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req++;
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req->first = cn_test_id.val + 20;
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req->range = 10;
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NETLINK_CB(skb).dst_group = ctl->group;
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//netlink_broadcast(nls, skb, 0, ctl->group, GFP_ATOMIC);
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netlink_unicast(nls, skb, 0, 0);
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pr_info("request was sent: group=0x%x\n", ctl->group);
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return 0;
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}
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#endif
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static u32 cn_test_timer_counter;
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static void cn_test_timer_func(struct timer_list *unused)
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{
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struct cn_msg *m;
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char data[32];
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pr_debug("%s: timer fired\n", __func__);
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m = kzalloc(sizeof(*m) + sizeof(data), GFP_ATOMIC);
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if (m) {
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memcpy(&m->id, &cn_test_id, sizeof(m->id));
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m->seq = cn_test_timer_counter;
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m->len = sizeof(data);
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m->len =
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scnprintf(data, sizeof(data), "counter = %u",
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cn_test_timer_counter) + 1;
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memcpy(m + 1, data, m->len);
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cn_netlink_send(m, 0, 0, GFP_ATOMIC);
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kfree(m);
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}
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cn_test_timer_counter++;
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mod_timer(&cn_test_timer, jiffies + msecs_to_jiffies(1000));
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}
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static int cn_test_init(void)
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{
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int err;
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err = cn_add_callback(&cn_test_id, cn_test_name, cn_test_callback);
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if (err)
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goto err_out;
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cn_test_id.val++;
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err = cn_add_callback(&cn_test_id, cn_test_name, cn_test_callback);
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if (err) {
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cn_del_callback(&cn_test_id);
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goto err_out;
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}
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timer_setup(&cn_test_timer, cn_test_timer_func, 0);
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mod_timer(&cn_test_timer, jiffies + msecs_to_jiffies(1000));
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pr_info("initialized with id={%u.%u}\n",
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cn_test_id.idx, cn_test_id.val);
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return 0;
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err_out:
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if (nls && nls->sk_socket)
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sock_release(nls->sk_socket);
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return err;
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}
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static void cn_test_fini(void)
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{
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del_timer_sync(&cn_test_timer);
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cn_del_callback(&cn_test_id);
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cn_test_id.val--;
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cn_del_callback(&cn_test_id);
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if (nls && nls->sk_socket)
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sock_release(nls->sk_socket);
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}
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module_init(cn_test_init);
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module_exit(cn_test_fini);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Evgeniy Polyakov <zbr@ioremap.net>");
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MODULE_DESCRIPTION("Connector's test module");
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