mirror of
https://github.com/morgan9e/systemd
synced 2026-04-15 00:47:10 +09:00
aaae822b37
When conditions fail on a service unit, a path unit can cause PID 1 to busy loop as it keeps trying to activate the service unit. To avoid this from happening, add a trigger limit to the path unit, identical to the trigger limit we have for socket units. Initially, let's start with a high limit and not make it configurable. If needed, we can add properties to configure the rate limit similar to the ones we have for socket units.
80 lines
1.7 KiB
C
80 lines
1.7 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#pragma once
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typedef struct Path Path;
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typedef struct PathSpec PathSpec;
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#include "unit.h"
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typedef enum PathType {
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PATH_EXISTS,
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PATH_EXISTS_GLOB,
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PATH_DIRECTORY_NOT_EMPTY,
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PATH_CHANGED,
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PATH_MODIFIED,
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_PATH_TYPE_MAX,
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_PATH_TYPE_INVALID = -EINVAL,
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} PathType;
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typedef struct PathSpec {
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Unit *unit;
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char *path;
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sd_event_source *event_source;
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LIST_FIELDS(struct PathSpec, spec);
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PathType type;
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int inotify_fd;
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int primary_wd;
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bool previous_exists;
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} PathSpec;
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int path_spec_watch(PathSpec *s, sd_event_io_handler_t handler);
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void path_spec_unwatch(PathSpec *s);
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int path_spec_fd_event(PathSpec *s, uint32_t events);
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void path_spec_done(PathSpec *s);
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static inline bool path_spec_owns_inotify_fd(PathSpec *s, int fd) {
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return s->inotify_fd == fd;
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}
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typedef enum PathResult {
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PATH_SUCCESS,
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PATH_FAILURE_RESOURCES,
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PATH_FAILURE_START_LIMIT_HIT,
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PATH_FAILURE_UNIT_START_LIMIT_HIT,
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PATH_FAILURE_TRIGGER_LIMIT_HIT,
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_PATH_RESULT_MAX,
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_PATH_RESULT_INVALID = -EINVAL,
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} PathResult;
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struct Path {
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Unit meta;
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LIST_HEAD(PathSpec, specs);
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PathState state, deserialized_state;
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bool make_directory;
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mode_t directory_mode;
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PathResult result;
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RateLimit trigger_limit;
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};
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void path_free_specs(Path *p);
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extern const UnitVTable path_vtable;
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const char* path_type_to_string(PathType i) _const_;
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PathType path_type_from_string(const char *s) _pure_;
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const char* path_result_to_string(PathResult i) _const_;
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PathResult path_result_from_string(const char *s) _pure_;
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DEFINE_CAST(PATH, Path);
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