xref: /dragonfly/sys/vfs/hammer2/hammer2_msgops.c (revision 7d3e9a5b)
1 /*
2  * Copyright (c) 2012-2018 The DragonFly Project.  All rights reserved.
3  *
4  * This code is derived from software contributed to The DragonFly Project
5  * by Matthew Dillon <dillon@dragonflybsd.org>
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  *
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in
15  *    the documentation and/or other materials provided with the
16  *    distribution.
17  * 3. Neither the name of The DragonFly Project nor the names of its
18  *    contributors may be used to endorse or promote products derived
19  *    from this software without specific, prior written permission.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
25  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32  * SUCH DAMAGE.
33  */
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/kernel.h>
37 #include <sys/proc.h>
38 #include <sys/mount.h>
39 
40 #include "hammer2.h"
41 
42 int
43 hammer2_msg_adhoc_input(kdmsg_msg_t *msg)
44 {
45 	kprintf("ADHOC INPUT MSG %08x\n", msg->any.head.cmd);
46 	return(0);
47 }
48 
49 int
50 hammer2_msg_dbg_rcvmsg(kdmsg_msg_t *msg)
51 {
52 	switch(msg->any.head.cmd & DMSGF_CMDSWMASK) {
53 	case DMSG_DBG_SHELL:
54 		/*
55 		 * Execute shell command (not supported atm)
56 		 *
57 		 * This is a one-way packet but if not (e.g. if part of
58 		 * a streaming transaction), we will have already closed
59 		 * our end.
60 		 */
61 		kdmsg_msg_reply(msg, DMSG_ERR_NOSUPP);
62 		break;
63 	case DMSG_DBG_SHELL | DMSGF_REPLY:
64 		/*
65 		 * Receive one or more replies to a shell command that we
66 		 * sent.
67 		 *
68 		 * This is a one-way packet but if not (e.g. if part of
69 		 * a streaming transaction), we will have already closed
70 		 * our end.
71 		 */
72 		if (msg->aux_data) {
73 			msg->aux_data[msg->aux_size - 1] = 0;
74 			kprintf("DEBUGMSG: %s\n", msg->aux_data);
75 		}
76 		break;
77 	default:
78 		/*
79 		 * We don't understand what is going on, issue a reply.
80 		 * This will take care of all left-over cases whether it
81 		 * is a transaction or one-way.
82 		 */
83 		kdmsg_msg_reply(msg, DMSG_ERR_NOSUPP);
84 		break;
85 	}
86 	return(0);
87 }
88