core: add a concept of "dynamic" user ids, that are allocated as long as a service...

[thirdparty/systemd.git] / src / core / unit.h

diff --git a/src/core/unit.h b/src/core/unit.h
index 1681bbf53ba7c4becb1e8db70b655926cf31f901..47eb8d50a68049770aeaf9ee425638f925a7d417 100644 (file)
--- 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
 
 /***
@@ -38,6 +36,7 @@ typedef struct UnitStatusMessageFormats UnitStatusMessageFormats;
 
 typedef enum KillOperation {
         KILL_TERMINATE,
+        KILL_TERMINATE_AND_LOG,
         KILL_KILL,
         KILL_ABORT,
         _KILL_OPERATION_MAX,
@@ -97,6 +96,9 @@ 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;
 
@@ -121,6 +123,10 @@ 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;
@@ -157,12 +163,20 @@ struct Unit {
          * 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;
 
@@ -176,6 +190,7 @@ struct Unit {
         /* Counterparts in the cgroup filesystem */
         char *cgroup_path;
         CGroupMask cgroup_realized_mask;
+        CGroupMask cgroup_enabled_mask;
         CGroupMask cgroup_subtree_mask;
         CGroupMask cgroup_members_mask;
         int cgroup_inotify_wd;
@@ -226,6 +241,8 @@ 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;
 };
@@ -274,6 +291,10 @@ 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;
 
@@ -375,7 +396,14 @@ 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,
@@ -397,12 +425,6 @@ struct UnitVTable {
         /* 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;
-
         /* True if transient units of this type are OK */
         bool can_transient:1;
 };
@@ -528,7 +550,7 @@ int unit_serialize_item_escaped(Unit *u, FILE *f, const char *key, const char *v
 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);
+int unit_add_node_link(Unit *u, const char *what, bool wants, UnitDependency d);
 
 int unit_coldplug(Unit *u);
 
@@ -571,6 +593,7 @@ 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);
@@ -588,6 +611,9 @@ 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);
 }
@@ -595,6 +621,8 @@ 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);
 
+int unit_start_limit_test(Unit *u);
+
 /* Macros which append UNIT= or USER_UNIT= to the message */
 
 #define log_unit_full(unit, level, error, ...)                          \