src/core/mount.h

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 #pragma once
   4
   5 /***
   6   This file is part of systemd.
   7
   8   Copyright 2010 Lennart Poettering
   9
  10   systemd is free software; you can redistribute it and/or modify it
  11   under the terms of the GNU Lesser General Public License as published by
  12   the Free Software Foundation; either version 2.1 of the License, or
  13   (at your option) any later version.
  14
  15   systemd is distributed in the hope that it will be useful, but
  16   WITHOUT ANY WARRANTY; without even the implied warranty of
  17   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  18   Lesser General Public License for more details.
  19
  20   You should have received a copy of the GNU Lesser General Public License
  21   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  22 ***/
  23
  24 typedef struct Mount Mount;
  25
  26 #include "unit.h"
  27 #include "kill.h"
  28 #include "execute.h"
  29 #include "cgroup.h"
  30
  31 typedef enum MountState {
  32         MOUNT_DEAD,
  33         MOUNT_MOUNTING,               /* /bin/mount is running, but the mount is not done yet. */
  34         MOUNT_MOUNTING_DONE,          /* /bin/mount is running, and the mount is done. */
  35         MOUNT_MOUNTED,
  36         MOUNT_REMOUNTING,
  37         MOUNT_UNMOUNTING,
  38         MOUNT_MOUNTING_SIGTERM,
  39         MOUNT_MOUNTING_SIGKILL,
  40         MOUNT_REMOUNTING_SIGTERM,
  41         MOUNT_REMOUNTING_SIGKILL,
  42         MOUNT_UNMOUNTING_SIGTERM,
  43         MOUNT_UNMOUNTING_SIGKILL,
  44         MOUNT_FAILED,
  45         _MOUNT_STATE_MAX,
  46         _MOUNT_STATE_INVALID = -1
  47 } MountState;
  48
  49 typedef enum MountExecCommand {
  50         MOUNT_EXEC_MOUNT,
  51         MOUNT_EXEC_UNMOUNT,
  52         MOUNT_EXEC_REMOUNT,
  53         _MOUNT_EXEC_COMMAND_MAX,
  54         _MOUNT_EXEC_COMMAND_INVALID = -1
  55 } MountExecCommand;
  56
  57 typedef enum MountResult {
  58         MOUNT_SUCCESS,
  59         MOUNT_FAILURE_RESOURCES,
  60         MOUNT_FAILURE_TIMEOUT,
  61         MOUNT_FAILURE_EXIT_CODE,
  62         MOUNT_FAILURE_SIGNAL,
  63         MOUNT_FAILURE_CORE_DUMP,
  64         _MOUNT_RESULT_MAX,
  65         _MOUNT_RESULT_INVALID = -1
  66 } MountResult;
  67
  68 typedef struct MountParameters {
  69         char *what;
  70         char *options;
  71         char *fstype;
  72 } MountParameters;
  73
  74 struct Mount {
  75         Unit meta;
  76
  77         char *where;
  78
  79         MountParameters parameters_proc_self_mountinfo;
  80         MountParameters parameters_fragment;
  81
  82         bool from_proc_self_mountinfo:1;
  83         bool from_fragment:1;
  84
  85         /* Used while looking for mount points that vanished or got
  86          * added from/to /proc/self/mountinfo */
  87         bool is_mounted:1;
  88         bool just_mounted:1;
  89         bool just_changed:1;
  90
  91         MountResult result;
  92         MountResult reload_result;
  93
  94         mode_t directory_mode;
  95
  96         usec_t timeout_usec;
  97
  98         ExecCommand exec_command[_MOUNT_EXEC_COMMAND_MAX];
  99
 100         ExecContext exec_context;
 101         KillContext kill_context;
 102         CGroupContext cgroup_context;
 103
 104         ExecRuntime *exec_runtime;
 105
 106         MountState state, deserialized_state;
 107
 108         ExecCommand* control_command;
 109         MountExecCommand control_command_id;
 110         pid_t control_pid;
 111
 112         sd_event_source *timer_event_source;
 113 };
 114
 115 extern const UnitVTable mount_vtable;
 116
 117 void mount_fd_event(Manager *m, int events);
 118
 119 const char* mount_state_to_string(MountState i) _const_;
 120 MountState mount_state_from_string(const char *s) _pure_;
 121
 122 const char* mount_exec_command_to_string(MountExecCommand i) _const_;
 123 MountExecCommand mount_exec_command_from_string(const char *s) _pure_;
 124
 125 const char* mount_result_to_string(MountResult i) _const_;
 126 MountResult mount_result_from_string(const char *s) _pure_;
 127
 128 void warn_if_dir_nonempty(const char *unit, const char* where);