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-rw-r--r--src/core/unit.h177
1 files changed, 109 insertions, 68 deletions
diff --git a/src/core/unit.h b/src/core/unit.h
index 9491ef64f9..a8dd3e602c 100644
--- a/src/core/unit.h
+++ b/src/core/unit.h
@@ -1,5 +1,3 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
#pragma once
/***
@@ -27,29 +25,18 @@
typedef struct Unit Unit;
typedef struct UnitVTable UnitVTable;
-typedef enum UnitActiveState UnitActiveState;
typedef struct UnitRef UnitRef;
typedef struct UnitStatusMessageFormats UnitStatusMessageFormats;
-#include "list.h"
#include "condition.h"
+#include "failure-action.h"
#include "install.h"
+#include "list.h"
#include "unit-name.h"
-#include "failure-action.h"
-
-enum UnitActiveState {
- UNIT_ACTIVE,
- UNIT_RELOADING,
- UNIT_INACTIVE,
- UNIT_FAILED,
- UNIT_ACTIVATING,
- UNIT_DEACTIVATING,
- _UNIT_ACTIVE_STATE_MAX,
- _UNIT_ACTIVE_STATE_INVALID = -1
-};
typedef enum KillOperation {
KILL_TERMINATE,
+ KILL_TERMINATE_AND_LOG,
KILL_KILL,
KILL_ABORT,
_KILL_OPERATION_MAX,
@@ -109,12 +96,22 @@ struct Unit {
usec_t source_mtime;
usec_t dropin_mtime;
+ /* If this is a transient unit we are currently writing, this is where we are writing it to */
+ FILE *transient_file;
+
/* If there is something to do with this unit, then this is the installed job for it */
Job *job;
/* JOB_NOP jobs are special and can be installed without disturbing the real job. */
Job *nop_job;
+ /* The slot used for watching NameOwnerChanged signals */
+ sd_bus_slot *match_bus_slot;
+
+ /* References to this unit from clients */
+ sd_bus_track *bus_track;
+ char **deserialized_refs;
+
/* Job timeout and action to take */
usec_t job_timeout;
FailureAction job_timeout_action;
@@ -130,6 +127,10 @@ struct Unit {
dual_timestamp condition_timestamp;
dual_timestamp assert_timestamp;
+ /* Updated whenever the low-level state changes */
+ dual_timestamp state_change_timestamp;
+
+ /* Updated whenever the (high-level) active state enters or leaves the active or inactive states */
dual_timestamp inactive_exit_timestamp;
dual_timestamp active_enter_timestamp;
dual_timestamp active_exit_timestamp;
@@ -158,36 +159,58 @@ struct Unit {
/* CGroup realize members queue */
LIST_FIELDS(Unit, cgroup_queue);
+ /* Units with the same CGroup netclass */
+ LIST_FIELDS(Unit, cgroup_netclass);
+
/* PIDs we keep an eye on. Note that a unit might have many
* more, but these are the ones we care enough about to
* process SIGCHLD for */
Set *pids;
+ /* Used in sigchld event invocation to avoid repeat events being invoked */
+ uint64_t sigchldgen;
+
/* Used during GC sweeps */
unsigned gc_marker;
/* Error code when we didn't manage to load the unit (negative) */
int load_error;
+ /* Put a ratelimit on unit starting */
+ RateLimit start_limit;
+ FailureAction start_limit_action;
+ char *reboot_arg;
+
/* Make sure we never enter endless loops with the check unneeded logic, or the BindsTo= logic */
RateLimit auto_stop_ratelimit;
+ /* Reference to a specific UID/GID */
+ uid_t ref_uid;
+ gid_t ref_gid;
+
/* Cached unit file state and preset */
UnitFileState unit_file_state;
int unit_file_preset;
- /* Where the cpuacct.usage cgroup counter was at the time the unit was started */
- nsec_t cpuacct_usage_base;
+ /* Where the cpu.stat or cpuacct.usage was at the time the unit was started */
+ nsec_t cpu_usage_base;
+ nsec_t cpu_usage_last; /* the most recently read value */
/* Counterparts in the cgroup filesystem */
char *cgroup_path;
- CGroupControllerMask cgroup_realized_mask;
- CGroupControllerMask cgroup_subtree_mask;
- CGroupControllerMask cgroup_members_mask;
+ CGroupMask cgroup_realized_mask;
+ CGroupMask cgroup_enabled_mask;
+ CGroupMask cgroup_subtree_mask;
+ CGroupMask cgroup_members_mask;
+ int cgroup_inotify_wd;
/* How to start OnFailure units */
JobMode on_failure_job_mode;
+ /* The current invocation ID */
+ sd_id128_t invocation_id;
+ char invocation_id_string[SD_ID128_STRING_MAX]; /* useful when logging */
+
/* Garbage collect us we nobody wants or requires us anymore */
bool stop_when_unneeded;
@@ -206,9 +229,6 @@ struct Unit {
/* Ignore this unit when isolating */
bool ignore_on_isolate;
- /* Ignore this unit when snapshotting */
- bool ignore_on_snapshot;
-
/* Did the last condition check succeed? */
bool condition_result;
bool assert_result;
@@ -232,8 +252,13 @@ struct Unit {
bool cgroup_members_mask_valid:1;
bool cgroup_subtree_mask_valid:1;
+ bool start_limit_hit:1;
+
/* Did we already invoke unit_coldplug() for this unit? */
bool coldplugged:1;
+
+ /* For transient units: whether to add a bus track reference after creating the unit */
+ bool bus_track_add:1;
};
struct UnitStatusMessageFormats {
@@ -248,17 +273,16 @@ typedef enum UnitSetPropertiesMode {
UNIT_PERSISTENT = 2,
} UnitSetPropertiesMode;
-#include "socket.h"
+#include "automount.h"
#include "busname.h"
-#include "target.h"
-#include "snapshot.h"
#include "device.h"
-#include "automount.h"
-#include "swap.h"
-#include "timer.h"
-#include "slice.h"
#include "path.h"
#include "scope.h"
+#include "slice.h"
+#include "socket.h"
+#include "swap.h"
+#include "target.h"
+#include "timer.h"
struct UnitVTable {
/* How much memory does an object of this unit type need */
@@ -281,6 +305,10 @@ struct UnitVTable {
* that */
size_t exec_runtime_offset;
+ /* If greater than 0, the offset into the object where the pointer to DynamicCreds is found, if the unit type
+ * has that. */
+ size_t dynamic_creds_offset;
+
/* The name of the configuration file section with the private settings of this unit */
const char *private_section;
@@ -325,7 +353,7 @@ struct UnitVTable {
int (*deserialize_item)(Unit *u, const char *key, const char *data, FDSet *fds);
/* Try to match up fds with what we need for this unit */
- int (*distribute_fds)(Unit *u, FDSet *fds);
+ void (*distribute_fds)(Unit *u, FDSet *fds);
/* Boils down the more complex internal state of this unit to
* a simpler one that the engine can understand */
@@ -346,9 +374,6 @@ struct UnitVTable {
* shall release its runtime resources */
void (*release_resources)(Unit *u);
- /* Return true when this unit is suitable for snapshotting */
- bool (*check_snapshot)(Unit *u);
-
/* Invoked on every child that died */
void (*sigchld_event)(Unit *u, pid_t pid, int code, int status);
@@ -362,8 +387,7 @@ struct UnitVTable {
/* Called whenever a process of this unit sends us a message */
void (*notify_message)(Unit *u, pid_t pid, char **tags, FDSet *fds);
- /* Called whenever a name this Unit registered for comes or
- * goes away. */
+ /* Called whenever a name this Unit registered for comes or goes away. */
void (*bus_name_owner_change)(Unit *u, const char *name, const char *old_owner, const char *new_owner);
/* Called for each property that is being set */
@@ -385,14 +409,21 @@ struct UnitVTable {
/* Called whenever CLOCK_REALTIME made a jump */
void (*time_change)(Unit *u);
- int (*get_timeout)(Unit *u, uint64_t *timeout);
+ /* Returns the next timeout of a unit */
+ int (*get_timeout)(Unit *u, usec_t *timeout);
+
+ /* Returns the main PID if there is any defined, or 0. */
+ pid_t (*main_pid)(Unit *u);
+
+ /* Returns the main PID if there is any defined, or 0. */
+ pid_t (*control_pid)(Unit *u);
/* This is called for each unit type and should be used to
* enumerate existing devices and load them. However,
* everything that is loaded here should still stay in
* inactive state. It is the job of the coldplug() call above
* to put the units into the initial state. */
- int (*enumerate)(Manager *m);
+ void (*enumerate)(Manager *m);
/* Type specific cleanups. */
void (*shutdown)(Manager *m);
@@ -401,24 +432,12 @@ struct UnitVTable {
* of this type will immediately fail. */
bool (*supported)(void);
- /* The interface name */
- const char *bus_interface;
-
/* The bus vtable */
const sd_bus_vtable *bus_vtable;
/* The strings to print in status messages */
UnitStatusMessageFormats status_message_formats;
- /* Can units of this type have multiple names? */
- bool no_alias:1;
-
- /* Instances make no sense for this type */
- bool no_instances:1;
-
- /* Exclude from automatic gc */
- bool no_gc:1;
-
/* True if transient units of this type are OK */
bool can_transient:1;
};
@@ -439,13 +458,16 @@ extern const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX];
/* For casting the various unit types into a unit */
#define UNIT(u) (&(u)->meta)
+#define UNIT_HAS_EXEC_CONTEXT(u) (UNIT_VTABLE(u)->exec_context_offset > 0)
+#define UNIT_HAS_CGROUP_CONTEXT(u) (UNIT_VTABLE(u)->cgroup_context_offset > 0)
+#define UNIT_HAS_KILL_CONTEXT(u) (UNIT_VTABLE(u)->kill_context_offset > 0)
+
#define UNIT_TRIGGER(u) ((Unit*) set_first((u)->dependencies[UNIT_TRIGGERS]))
DEFINE_CAST(SERVICE, Service);
DEFINE_CAST(SOCKET, Socket);
DEFINE_CAST(BUSNAME, BusName);
DEFINE_CAST(TARGET, Target);
-DEFINE_CAST(SNAPSHOT, Snapshot);
DEFINE_CAST(DEVICE, Device);
DEFINE_CAST(MOUNT, Mount);
DEFINE_CAST(AUTOMOUNT, Automount);
@@ -466,9 +488,6 @@ int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit
int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *filename, bool add_reference);
int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference);
-int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *filename, bool add_reference);
-int unit_add_two_dependencies_by_name_inverse(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference);
-
int unit_add_exec_dependencies(Unit *u, ExecContext *c);
int unit_choose_id(Unit *u, const char *name);
@@ -490,7 +509,8 @@ int unit_load_fragment_and_dropin(Unit *u);
int unit_load_fragment_and_dropin_optional(Unit *u);
int unit_load(Unit *unit);
-int unit_add_default_slice(Unit *u, CGroupContext *c);
+int unit_set_slice(Unit *u, Unit *slice);
+int unit_set_default_slice(Unit *u);
const char *unit_description(Unit *u) _pure_;
@@ -517,11 +537,11 @@ void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_su
int unit_watch_pid(Unit *u, pid_t pid);
void unit_unwatch_pid(Unit *u, pid_t pid);
-int unit_watch_all_pids(Unit *u);
void unit_unwatch_all_pids(Unit *u);
void unit_tidy_watch_pids(Unit *u, pid_t except1, pid_t except2);
+int unit_install_bus_match(Unit *u, sd_bus *bus, const char *name);
int unit_watch_bus_name(Unit *u, const char *name);
void unit_unwatch_bus_name(Unit *u, const char *name);
@@ -530,20 +550,26 @@ bool unit_job_is_applicable(Unit *u, JobType j);
int set_unit_path(const char *p);
char *unit_dbus_path(Unit *u);
+char *unit_dbus_path_invocation_id(Unit *u);
int unit_load_related_unit(Unit *u, const char *type, Unit **_found);
bool unit_can_serialize(Unit *u) _pure_;
+
int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs);
-void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *value, ...) _printf_(4,5);
-void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value);
int unit_deserialize(Unit *u, FILE *f, FDSet *fds);
-int unit_add_node_link(Unit *u, const char *what, bool wants);
+int unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value);
+int unit_serialize_item_escaped(Unit *u, FILE *f, const char *key, const char *value);
+int unit_serialize_item_fd(Unit *u, FILE *f, FDSet *fds, const char *key, int fd);
+void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *value, ...) _printf_(4,5);
+
+int unit_add_node_link(Unit *u, const char *what, bool wants, UnitDependency d);
int unit_coldplug(Unit *u);
void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) _printf_(3, 0);
+void unit_status_emit_starting_stopping_reloading(Unit *u, JobType t);
bool unit_need_daemon_reload(Unit *u);
@@ -560,8 +586,6 @@ bool unit_active_or_pending(Unit *u);
int unit_add_default_target_dependency(Unit *u, Unit *target);
-char *unit_default_cgroup_path(Unit *u);
-
void unit_start_on_failure(Unit *u);
void unit_trigger_notify(Unit *u);
@@ -583,6 +607,7 @@ CGroupContext *unit_get_cgroup_context(Unit *u) _pure_;
ExecRuntime *unit_get_exec_runtime(Unit *u) _pure_;
int unit_setup_exec_runtime(Unit *u);
+int unit_setup_dynamic_creds(Unit *u);
int unit_write_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data);
int unit_write_drop_in_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) _printf_(4,5);
@@ -590,8 +615,6 @@ int unit_write_drop_in_format(Unit *u, UnitSetPropertiesMode mode, const char *n
int unit_write_drop_in_private(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data);
int unit_write_drop_in_private_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) _printf_(4,5);
-int unit_remove_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name);
-
int unit_kill_context(Unit *u, KillContext *c, KillOperation k, pid_t main_pid, pid_t control_pid, bool main_pid_alien);
int unit_make_transient(Unit *u);
@@ -600,6 +623,11 @@ int unit_require_mounts_for(Unit *u, const char *path);
bool unit_type_supported(UnitType t);
+bool unit_is_pristine(Unit *u);
+
+pid_t unit_control_pid(Unit *u);
+pid_t unit_main_pid(Unit *u);
+
static inline bool unit_supported(Unit *u) {
return unit_type_supported(u->type);
}
@@ -607,15 +635,28 @@ static inline bool unit_supported(Unit *u) {
void unit_warn_if_dir_nonempty(Unit *u, const char* where);
int unit_fail_if_symlink(Unit *u, const char* where);
-const char *unit_active_state_to_string(UnitActiveState i) _const_;
-UnitActiveState unit_active_state_from_string(const char *s) _pure_;
+int unit_start_limit_test(Unit *u);
+
+void unit_unref_uid(Unit *u, bool destroy_now);
+int unit_ref_uid(Unit *u, uid_t uid, bool clean_ipc);
+
+void unit_unref_gid(Unit *u, bool destroy_now);
+int unit_ref_gid(Unit *u, gid_t gid, bool clean_ipc);
+
+int unit_ref_uid_gid(Unit *u, uid_t uid, gid_t gid);
+void unit_unref_uid_gid(Unit *u, bool destroy_now);
+
+void unit_notify_user_lookup(Unit *u, uid_t uid, gid_t gid);
+
+int unit_set_invocation_id(Unit *u, sd_id128_t id);
+int unit_acquire_invocation_id(Unit *u);
/* Macros which append UNIT= or USER_UNIT= to the message */
#define log_unit_full(unit, level, error, ...) \
({ \
- Unit *_u = (unit); \
- _u ? log_object_internal(level, error, __FILE__, __LINE__, __func__, _u->manager->unit_log_field, _u->id, ##__VA_ARGS__) : \
+ const Unit *_u = (unit); \
+ _u ? log_object_internal(level, error, __FILE__, __LINE__, __func__, _u->manager->unit_log_field, _u->id, _u->manager->invocation_log_field, _u->invocation_id_string, ##__VA_ARGS__) : \
log_internal(level, error, __FILE__, __LINE__, __func__, ##__VA_ARGS__); \
})
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-07-23 00:10:34 +0000