udevd.h

   1 /*
   2  * udevd.h
   3  *
   4  * Copyright (C) 2004 Ling, Xiaofeng <xiaofeng.ling@intel.com>
   5  * Copyright (C) 2004-2005 Kay Sievers <kay.sievers@vrfy.org>
   6  *
   7  *      This program is free software; you can redistribute it and/or modify it
   8  *      under the terms of the GNU General Public License as published by the
   9  *      Free Software Foundation version 2 of the License.
  10  *
  11  *      This program is distributed in the hope that it will be useful, but
  12  *      WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  *      General Public License for more details.
  15  *
  16  *      You should have received a copy of the GNU General Public License along
  17  *      with this program; if not, write to the Free Software Foundation, Inc.,
  18  *      675 Mass Ave, Cambridge, MA 02139, USA.
  19  *
  20  */
  21
  22 #include "list.h"
  23
  24 #define UDEV_MAGIC                      "udevd_" UDEV_VERSION
  25 #define UDEVD_SOCK_PATH                 "/org/kernel/udev/udevd"
  26 #define UDEVSEND_WAIT_MAX_SECONDS       3
  27 #define UDEVSEND_WAIT_LOOP_PER_SECOND   10
  28
  29 #define UDEVD_PRIORITY                  -4
  30 #define UDEV_PRIORITY                   -2
  31
  32 #define EVENT_QUEUE_DIR                 ".udev/queue"
  33 #define EVENT_FAILED_DIR                ".udev/failed"
  34
  35 /* maximum limit of forked childs */
  36 #define UDEVD_MAX_CHILDS                64
  37 /* start to throttle forking if maximum number of running childs in our session is reached */
  38 #define UDEVD_MAX_CHILDS_RUNNING        16
  39
  40 /* environment buffer, should match the kernel's size in lib/kobject_uevent.h */
  41 #define UEVENT_BUFFER_SIZE              2048
  42 #define UEVENT_NUM_ENVP                 64
  43
  44 enum udevd_msg_type {
  45         UDEVD_UNKNOWN,
  46         UDEVD_UEVENT_UDEVSEND,
  47         UDEVD_UEVENT_NETLINK,
  48         UDEVD_STOP_EXEC_QUEUE,
  49         UDEVD_START_EXEC_QUEUE,
  50         UDEVD_SET_LOG_LEVEL,
  51         UDEVD_SET_MAX_CHILDS,
  52         UDEVD_RELOAD_RULES,
  53 };
  54
  55
  56 struct udevd_msg {
  57         char magic[32];
  58         enum udevd_msg_type type;
  59         char envbuf[UEVENT_BUFFER_SIZE+512];
  60 };
  61
  62 struct uevent_msg {
  63         enum udevd_msg_type type;
  64         struct list_head node;
  65         pid_t pid;
  66         int exitstatus;
  67         time_t queue_time;
  68         char *action;
  69         char *devpath;
  70         char *subsystem;
  71         dev_t devt;
  72         unsigned long long seqnum;
  73         char *physdevpath;
  74         unsigned int timeout;
  75         char *envp[UEVENT_NUM_ENVP+1];
  76         char envbuf[];
  77 };