2017-11-18 17:09:20 +01:00
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/* SPDX-License-Identifier: LGPL-2.1+ */
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2012-07-18 19:07:51 +02:00
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#pragma once
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2010-05-09 18:44:11 +02:00
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/***
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2018-06-12 19:00:24 +02:00
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Copyright © 2010 Maarten Lankhorst
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2010-05-09 18:44:11 +02:00
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***/
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2018-08-22 07:43:11 +02:00
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#include "sd-device.h"
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2018-05-15 20:17:34 +02:00
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#include "unit.h"
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2013-11-25 21:08:39 +01:00
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2010-05-09 18:44:11 +02:00
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typedef struct Swap Swap;
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2010-10-12 04:07:43 +02:00
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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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2012-02-03 04:47:32 +01:00
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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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core: move enforcement of the start limit into per-unit-type code again
Let's move the enforcement of the per-unit start limit from unit.c into the
type-specific files again. For unit types that know a concept of "result" codes
this allows us to hook up the start limit condition to it with an explicit
result code. Also, this makes sure that the state checks in clal like
service_start() may be done before the start limit is checked, as the start
limit really should be checked last, right before everything has been verified
to be in order.
The generic start limit logic is left in unit.c, but the invocation of it is
moved into the per-type files, in the various xyz_start() functions, so that
they may place the check at the right location.
Note that this change drops the enforcement entirely from device, slice, target
and scope units, since these unit types generally may not fail activation, or
may only be activated a single time. This is also documented now.
Note that restores the "start-limit-hit" result code that existed before
6bf0f408e4833152197fb38fb10a9989c89f3a59 already in the service code. However,
it's not introduced for all units that have a result code concept.
Fixes #3166.
2016-05-02 13:01:26 +02:00
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SWAP_FAILURE_START_LIMIT_HIT,
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2012-02-03 04:47:32 +01:00
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_SWAP_RESULT_MAX,
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_SWAP_RESULT_INVALID = -1
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} SwapResult;
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2013-11-25 15:26:30 +01:00
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typedef struct SwapParameters {
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char *what;
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2014-10-28 14:24:46 +01:00
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char *options;
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2013-11-25 15:26:30 +01:00
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int priority;
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} SwapParameters;
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2010-05-09 18:44:11 +02:00
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struct Swap {
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2012-01-15 12:04:08 +01:00
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Unit meta;
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2010-05-09 18:44:11 +02:00
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2010-10-12 04:07:43 +02:00
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char *what;
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2013-11-25 21:08:39 +01:00
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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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2010-05-14 02:29:45 +02:00
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SwapParameters parameters_proc_swaps;
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SwapParameters parameters_fragment;
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2010-05-09 18:44:11 +02:00
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2010-05-14 02:29:45 +02:00
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bool from_proc_swaps:1;
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bool from_fragment:1;
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2010-10-12 04:07:43 +02:00
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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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2012-02-03 04:47:32 +01:00
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SwapResult result;
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2010-10-12 04:07:43 +02:00
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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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2012-07-19 23:47:10 +02:00
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KillContext kill_context;
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2013-06-27 04:14:27 +02:00
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CGroupContext cgroup_context;
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2010-10-12 04:07:43 +02:00
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2013-11-27 20:23:18 +01:00
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ExecRuntime *exec_runtime;
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2016-07-14 12:37:28 +02:00
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DynamicCreds dynamic_creds;
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2013-11-27 20:23:18 +01:00
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2010-10-12 04:07:43 +02:00
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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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2013-11-19 21:12:59 +01:00
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sd_event_source *timer_event_source;
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2010-10-12 04:07:43 +02:00
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2011-02-21 15:32:17 +01:00
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/* In order to be able to distinguish dependencies on
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2010-10-12 04:07:43 +02:00
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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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2013-11-25 21:08:39 +01:00
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LIST_FIELDS(struct Swap, same_devnode);
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2010-05-09 18:44:11 +02:00
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};
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extern const UnitVTable swap_vtable;
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2018-08-22 07:43:11 +02:00
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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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2013-11-25 21:08:39 +01:00
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2013-05-03 04:51:50 +02:00
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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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2010-05-09 18:44:11 +02:00
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2013-05-03 04:51:50 +02:00
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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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2018-05-15 20:17:34 +02:00
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DEFINE_CAST(SWAP, Swap);
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