src/swap.h

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 #ifndef fooswaphfoo
   4 #define fooswaphfoo
   5
   6 /***
   7   This file is part of systemd.
   8
   9   Copyright 2010 Lennart Poettering
  10   Copyright 2010 Maarten Lankhorst
  11
  12   systemd is free software; you can redistribute it and/or modify it
  13   under the terms of the GNU General Public License as published by
  14   the Free Software Foundation; either version 2 of the License, or
  15   (at your option) any later version.
  16
  17   systemd is distributed in the hope that it will be useful, but
  18   WITHOUT ANY WARRANTY; without even the implied warranty of
  19   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  20   General Public License for more details.
  21
  22   You should have received a copy of the GNU General Public License
  23   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  24 ***/
  25
  26 typedef struct Swap Swap;
  27
  28 #include "unit.h"
  29
  30 typedef enum SwapState {
  31         SWAP_DEAD,
  32         SWAP_ACTIVATING,
  33         SWAP_ACTIVE,
  34         SWAP_DEACTIVATING,
  35         SWAP_ACTIVATING_SIGTERM,
  36         SWAP_ACTIVATING_SIGKILL,
  37         SWAP_DEACTIVATING_SIGTERM,
  38         SWAP_DEACTIVATING_SIGKILL,
  39         SWAP_FAILED,
  40         _SWAP_STATE_MAX,
  41         _SWAP_STATE_INVALID = -1
  42 } SwapState;
  43
  44 typedef enum SwapExecCommand {
  45         SWAP_EXEC_ACTIVATE,
  46         SWAP_EXEC_DEACTIVATE,
  47         _SWAP_EXEC_COMMAND_MAX,
  48         _SWAP_EXEC_COMMAND_INVALID = -1
  49 } SwapExecCommand;
  50
  51 typedef struct SwapParameters {
  52         char *what;
  53         int priority;
  54         bool noauto:1;
  55         bool nofail:1;
  56         bool handle:1;
  57 } SwapParameters;
  58
  59 struct Swap {
  60         Meta meta;
  61
  62         char *what;
  63
  64         SwapParameters parameters_etc_fstab;
  65         SwapParameters parameters_proc_swaps;
  66         SwapParameters parameters_fragment;
  67
  68         bool from_etc_fstab:1;
  69         bool from_proc_swaps:1;
  70         bool from_fragment:1;
  71
  72         bool failure:1;
  73
  74         /* Used while looking for swaps that vanished or got added
  75          * from/to /proc/swaps */
  76         bool is_active:1;
  77         bool just_activated:1;
  78
  79         usec_t timeout_usec;
  80
  81         ExecCommand exec_command[_SWAP_EXEC_COMMAND_MAX];
  82         ExecContext exec_context;
  83
  84         SwapState state, deserialized_state;
  85
  86         ExecCommand* control_command;
  87         SwapExecCommand control_command_id;
  88         pid_t control_pid;
  89
  90         Watch timer_watch;
  91
  92         /* In order to be able to distinguish dependencies on
  93         different device nodes we might end up creating multiple
  94         devices for the same swap. We chain them up here. */
  95
  96         LIST_FIELDS(struct Swap, same_proc_swaps);
  97 };
  98
  99 extern const UnitVTable swap_vtable;
 100
 101 int swap_add_one(Manager *m, const char *what, const char *what_proc_swaps, int prio, bool no_auto, bool no_fail, bool handle, bool set_flags);
 102
 103 int swap_add_one_mount_link(Swap *s, Mount *m);
 104
 105 int swap_dispatch_reload(Manager *m);
 106 int swap_fd_event(Manager *m, int events);
 107
 108 const char* swap_state_to_string(SwapState i);
 109 SwapState swap_state_from_string(const char *s);
 110
 111 const char* swap_exec_command_to_string(SwapExecCommand i);
 112 SwapExecCommand swap_exec_command_from_string(const char *s);
 113
 114 #endif