7477451b69
Negative priorities are useful for swap targets which should be only used as last resort.
100 lines
2.5 KiB
C
100 lines
2.5 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#pragma once
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/***
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Copyright © 2010 Maarten Lankhorst
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***/
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#include "sd-device.h"
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#include "unit.h"
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typedef struct Swap Swap;
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typedef enum SwapExecCommand {
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SWAP_EXEC_ACTIVATE,
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SWAP_EXEC_DEACTIVATE,
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_SWAP_EXEC_COMMAND_MAX,
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_SWAP_EXEC_COMMAND_INVALID = -1
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} SwapExecCommand;
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typedef enum SwapResult {
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SWAP_SUCCESS,
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SWAP_FAILURE_RESOURCES,
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SWAP_FAILURE_TIMEOUT,
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SWAP_FAILURE_EXIT_CODE,
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SWAP_FAILURE_SIGNAL,
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SWAP_FAILURE_CORE_DUMP,
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SWAP_FAILURE_START_LIMIT_HIT,
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_SWAP_RESULT_MAX,
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_SWAP_RESULT_INVALID = -1
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} SwapResult;
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typedef struct SwapParameters {
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char *what;
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char *options;
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int priority;
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bool priority_set;
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} SwapParameters;
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struct Swap {
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Unit meta;
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char *what;
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/* If the device has already shown up, this is the device
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* node, which might be different from what, due to
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* symlinks */
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char *devnode;
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SwapParameters parameters_proc_swaps;
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SwapParameters parameters_fragment;
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bool from_proc_swaps:1;
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bool from_fragment:1;
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/* Used while looking for swaps that vanished or got added
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* from/to /proc/swaps */
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bool is_active:1;
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bool just_activated:1;
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SwapResult result;
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SwapResult clean_result;
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usec_t timeout_usec;
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ExecCommand exec_command[_SWAP_EXEC_COMMAND_MAX];
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ExecContext exec_context;
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KillContext kill_context;
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CGroupContext cgroup_context;
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ExecRuntime *exec_runtime;
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DynamicCreds dynamic_creds;
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SwapState state, deserialized_state;
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ExecCommand* control_command;
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SwapExecCommand control_command_id;
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pid_t control_pid;
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sd_event_source *timer_event_source;
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/* In order to be able to distinguish dependencies on
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different device nodes we might end up creating multiple
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devices for the same swap. We chain them up here. */
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LIST_FIELDS(struct Swap, same_devnode);
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};
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extern const UnitVTable swap_vtable;
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int swap_process_device_new(Manager *m, sd_device *dev);
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int swap_process_device_remove(Manager *m, sd_device *dev);
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const char* swap_exec_command_to_string(SwapExecCommand i) _const_;
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SwapExecCommand swap_exec_command_from_string(const char *s) _pure_;
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const char* swap_result_to_string(SwapResult i) _const_;
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SwapResult swap_result_from_string(const char *s) _pure_;
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DEFINE_CAST(SWAP, Swap);
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