Line data    Source code

       1             : /* SPDX-License-Identifier: LGPL-2.1+ */
       2             : #pragma once
       3             : 
       4             : /***
       5             :   Copyright © 2010 Maarten Lankhorst
       6             : ***/
       7             : 
       8             : #include "sd-device.h"
       9             : #include "unit.h"
      10             : 
      11             : typedef struct Swap Swap;
      12             : 
      13             : typedef enum SwapExecCommand {
      14             :         SWAP_EXEC_ACTIVATE,
      15             :         SWAP_EXEC_DEACTIVATE,
      16             :         _SWAP_EXEC_COMMAND_MAX,
      17             :         _SWAP_EXEC_COMMAND_INVALID = -1
      18             : } SwapExecCommand;
      19             : 
      20             : typedef enum SwapResult {
      21             :         SWAP_SUCCESS,
      22             :         SWAP_FAILURE_RESOURCES,
      23             :         SWAP_FAILURE_TIMEOUT,
      24             :         SWAP_FAILURE_EXIT_CODE,
      25             :         SWAP_FAILURE_SIGNAL,
      26             :         SWAP_FAILURE_CORE_DUMP,
      27             :         SWAP_FAILURE_START_LIMIT_HIT,
      28             :         _SWAP_RESULT_MAX,
      29             :         _SWAP_RESULT_INVALID = -1
      30             : } SwapResult;
      31             : 
      32             : typedef struct SwapParameters {
      33             :         char *what;
      34             :         char *options;
      35             :         int priority;
      36             : } SwapParameters;
      37             : 
      38             : struct Swap {
      39             :         Unit meta;
      40             : 
      41             :         char *what;
      42             : 
      43             :         /* If the device has already shown up, this is the device
      44             :          * node, which might be different from what, due to
      45             :          * symlinks */
      46             :         char *devnode;
      47             : 
      48             :         SwapParameters parameters_proc_swaps;
      49             :         SwapParameters parameters_fragment;
      50             : 
      51             :         bool from_proc_swaps:1;
      52             :         bool from_fragment:1;
      53             : 
      54             :         /* Used while looking for swaps that vanished or got added
      55             :          * from/to /proc/swaps */
      56             :         bool is_active:1;
      57             :         bool just_activated:1;
      58             : 
      59             :         SwapResult result;
      60             : 
      61             :         usec_t timeout_usec;
      62             : 
      63             :         ExecCommand exec_command[_SWAP_EXEC_COMMAND_MAX];
      64             :         ExecContext exec_context;
      65             :         KillContext kill_context;
      66             :         CGroupContext cgroup_context;
      67             : 
      68             :         ExecRuntime *exec_runtime;
      69             :         DynamicCreds dynamic_creds;
      70             : 
      71             :         SwapState state, deserialized_state;
      72             : 
      73             :         ExecCommand* control_command;
      74             :         SwapExecCommand control_command_id;
      75             :         pid_t control_pid;
      76             : 
      77             :         sd_event_source *timer_event_source;
      78             : 
      79             :         /* In order to be able to distinguish dependencies on
      80             :         different device nodes we might end up creating multiple
      81             :         devices for the same swap. We chain them up here. */
      82             : 
      83             :         LIST_FIELDS(struct Swap, same_devnode);
      84             : };
      85             : 
      86             : extern const UnitVTable swap_vtable;
      87             : 
      88             : int swap_process_device_new(Manager *m, sd_device *dev);
      89             : int swap_process_device_remove(Manager *m, sd_device *dev);
      90             : 
      91             : const char* swap_exec_command_to_string(SwapExecCommand i) _const_;
      92             : SwapExecCommand swap_exec_command_from_string(const char *s) _pure_;
      93             : 
      94             : const char* swap_result_to_string(SwapResult i) _const_;
      95             : SwapResult swap_result_from_string(const char *s) _pure_;
      96             : 
      97        1363 : DEFINE_CAST(SWAP, Swap);