sys/vfs/hammer2/hammer2_msgops.c

   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/fcntl.h>
  38 #include <sys/buf.h>
  39 #include <sys/proc.h>
  40 #include <sys/namei.h>
  41 #include <sys/mount.h>
  42 #include <sys/vnode.h>
  43 #include <sys/mountctl.h>
  44 #include <sys/dirent.h>
  45 #include <sys/uio.h>
  46
  47 #include "hammer2.h"
  48
  49 int
  50 hammer2_msg_adhoc_input(kdmsg_msg_t *msg)
  51 {
  52         kprintf("ADHOC INPUT MSG %08x\n", msg->any.head.cmd);
  53         return(0);
  54 }
  55
  56 int
  57 hammer2_msg_dbg_rcvmsg(kdmsg_msg_t *msg)
  58 {
  59         switch(msg->any.head.cmd & DMSGF_CMDSWMASK) {
  60         case DMSG_DBG_SHELL:
  61                 /*
  62                  * Execute shell command (not supported atm)
  63                  *
  64                  * This is a one-way packet but if not (e.g. if part of
  65                  * a streaming transaction), we will have already closed
  66                  * our end.
  67                  */
  68                 kdmsg_msg_reply(msg, DMSG_ERR_NOSUPP);
  69                 break;
  70         case DMSG_DBG_SHELL | DMSGF_REPLY:
  71                 /*
  72                  * Receive one or more replies to a shell command that we
  73                  * sent.
  74                  *
  75                  * This is a one-way packet but if not (e.g. if part of
  76                  * a streaming transaction), we will have already closed
  77                  * our end.
  78                  */
  79                 if (msg->aux_data) {
  80                         msg->aux_data[msg->aux_size - 1] = 0;
  81                         kprintf("DEBUGMSG: %s\n", msg->aux_data);
  82                 }
  83                 break;
  84         default:
  85                 /*
  86                  * We don't understand what is going on, issue a reply.
  87                  * This will take care of all left-over cases whether it
  88                  * is a transaction or one-way.
  89                  */
  90                 kdmsg_msg_reply(msg, DMSG_ERR_NOSUPP);
  91                 break;
  92         }
  93         return(0);
  94 }