src/core/mount.h

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2 #pragma once
   3
   4 typedef struct Mount Mount;
   5
   6 #include "kill.h"
   7 #include "dynamic-user.h"
   8 #include "unit.h"
   9
  10 typedef enum MountExecCommand {
  11         MOUNT_EXEC_MOUNT,
  12         MOUNT_EXEC_UNMOUNT,
  13         MOUNT_EXEC_REMOUNT,
  14         _MOUNT_EXEC_COMMAND_MAX,
  15         _MOUNT_EXEC_COMMAND_INVALID = -1
  16 } MountExecCommand;
  17
  18 typedef enum MountResult {
  19         MOUNT_SUCCESS,
  20         MOUNT_FAILURE_RESOURCES, /* a bit of a misnomer, just our catch-all error for errnos we didn't expect */
  21         MOUNT_FAILURE_TIMEOUT,
  22         MOUNT_FAILURE_EXIT_CODE,
  23         MOUNT_FAILURE_SIGNAL,
  24         MOUNT_FAILURE_CORE_DUMP,
  25         MOUNT_FAILURE_START_LIMIT_HIT,
  26         MOUNT_FAILURE_PROTOCOL,
  27         _MOUNT_RESULT_MAX,
  28         _MOUNT_RESULT_INVALID = -1
  29 } MountResult;
  30
  31 typedef struct MountParameters {
  32         char *what;
  33         char *options;
  34         char *fstype;
  35 } MountParameters;
  36
  37 /* Used while looking for mount points that vanished or got added from/to /proc/self/mountinfo */
  38 typedef enum MountProcFlags {
  39         MOUNT_PROC_IS_MOUNTED   = 1 << 0,
  40         MOUNT_PROC_JUST_MOUNTED = 1 << 1,
  41         MOUNT_PROC_JUST_CHANGED = 1 << 2,
  42 } MountProcFlags;
  43
  44 struct Mount {
  45         Unit meta;
  46
  47         char *where;
  48
  49         MountParameters parameters_proc_self_mountinfo;
  50         MountParameters parameters_fragment;
  51
  52         bool from_proc_self_mountinfo:1;
  53         bool from_fragment:1;
  54
  55         MountProcFlags proc_flags;
  56
  57         bool sloppy_options;
  58
  59         bool lazy_unmount;
  60         bool force_unmount;
  61
  62         bool read_write_only;
  63
  64         MountResult result;
  65         MountResult reload_result;
  66         MountResult clean_result;
  67
  68         mode_t directory_mode;
  69
  70         usec_t timeout_usec;
  71
  72         ExecCommand exec_command[_MOUNT_EXEC_COMMAND_MAX];
  73
  74         ExecContext exec_context;
  75         KillContext kill_context;
  76         CGroupContext cgroup_context;
  77
  78         ExecRuntime *exec_runtime;
  79         DynamicCreds dynamic_creds;
  80
  81         MountState state, deserialized_state;
  82
  83         ExecCommand* control_command;
  84         MountExecCommand control_command_id;
  85         pid_t control_pid;
  86
  87         sd_event_source *timer_event_source;
  88
  89         unsigned n_retry_umount;
  90 };
  91
  92 extern const UnitVTable mount_vtable;
  93
  94 void mount_fd_event(Manager *m, int events);
  95
  96 const char* mount_exec_command_to_string(MountExecCommand i) _const_;
  97 MountExecCommand mount_exec_command_from_string(const char *s) _pure_;
  98
  99 const char* mount_result_to_string(MountResult i) _const_;
 100 MountResult mount_result_from_string(const char *s) _pure_;
 101
 102 DEFINE_CAST(MOUNT, Mount);