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 "kill.h"
  27 #include "execute.h"
  28
  29 typedef enum MountState {
  30         MOUNT_DEAD,
  31         MOUNT_MOUNTING,               /* /bin/mount is running, but the mount is not done yet. */
  32         MOUNT_MOUNTING_DONE,          /* /bin/mount is running, and the mount is done. */
  33         MOUNT_MOUNTED,
  34         MOUNT_REMOUNTING,
  35         MOUNT_UNMOUNTING,
  36         MOUNT_MOUNTING_SIGTERM,
  37         MOUNT_MOUNTING_SIGKILL,
  38         MOUNT_REMOUNTING_SIGTERM,
  39         MOUNT_REMOUNTING_SIGKILL,
  40         MOUNT_UNMOUNTING_SIGTERM,
  41         MOUNT_UNMOUNTING_SIGKILL,
  42         MOUNT_FAILED,
  43         _MOUNT_STATE_MAX,
  44         _MOUNT_STATE_INVALID = -1
  45 } MountState;
  46
  47 typedef enum MountExecCommand {
  48         MOUNT_EXEC_MOUNT,
  49         MOUNT_EXEC_UNMOUNT,
  50         MOUNT_EXEC_REMOUNT,
  51         _MOUNT_EXEC_COMMAND_MAX,
  52         _MOUNT_EXEC_COMMAND_INVALID = -1
  53 } MountExecCommand;
  54
  55 typedef enum MountResult {
  56         MOUNT_SUCCESS,
  57         MOUNT_FAILURE_RESOURCES,
  58         MOUNT_FAILURE_TIMEOUT,
  59         MOUNT_FAILURE_EXIT_CODE,
  60         MOUNT_FAILURE_SIGNAL,
  61         MOUNT_FAILURE_CORE_DUMP,
  62         _MOUNT_RESULT_MAX,
  63         _MOUNT_RESULT_INVALID = -1
  64 } MountResult;
  65
  66 typedef struct MountParameters {
  67         char *what;
  68         char *options;
  69         char *fstype;
  70 } MountParameters;
  71
  72 struct Mount {
  73         Unit meta;
  74
  75         char *where;
  76
  77         MountParameters parameters_proc_self_mountinfo;
  78         MountParameters parameters_fragment;
  79
  80         bool from_proc_self_mountinfo:1;
  81         bool from_fragment:1;
  82
  83         /* Used while looking for mount points that vanished or got
  84          * added from/to /proc/self/mountinfo */
  85         bool is_mounted:1;
  86         bool just_mounted:1;
  87         bool just_changed:1;
  88
  89         bool reset_cpu_usage:1;
  90
  91         bool sloppy_options;
  92
  93         MountResult result;
  94         MountResult reload_result;
  95
  96         mode_t directory_mode;
  97
  98         usec_t timeout_usec;
  99
 100         ExecCommand exec_command[_MOUNT_EXEC_COMMAND_MAX];
 101
 102         ExecContext exec_context;
 103         KillContext kill_context;
 104         CGroupContext cgroup_context;
 105
 106         ExecRuntime *exec_runtime;
 107
 108         MountState state, deserialized_state;
 109
 110         ExecCommand* control_command;
 111         MountExecCommand control_command_id;
 112         pid_t control_pid;
 113
 114         sd_event_source *timer_event_source;
 115
 116         unsigned n_retry_umount;
 117 };
 118
 119 extern const UnitVTable mount_vtable;
 120
 121 void mount_fd_event(Manager *m, int events);
 122
 123 const char* mount_state_to_string(MountState i) _const_;
 124 MountState mount_state_from_string(const char *s) _pure_;
 125
 126 const char* mount_exec_command_to_string(MountExecCommand i) _const_;
 127 MountExecCommand mount_exec_command_from_string(const char *s) _pure_;
 128
 129 const char* mount_result_to_string(MountResult i) _const_;
 130 MountResult mount_result_from_string(const char *s) _pure_;
 131
 132 void unit_warn_if_dir_nonempty(Unit *u, const char* where);
 133 int unit_fail_if_symlink(Unit *u, const char* where);