units: remove service sysv_path variable and replace it by generic unit_path

UnitPath= is also writable via native units and may be used by generators
to clarify from which file a unit is generated. This patch also hooks up
the cryptsetup and fstab generators to set UnitPath= accordingly.

10 files changed, 49 insertions, 56 deletions

diff --git a/src/core/dbus-service.c b/src/core/dbus-service.c
index e0e5ffcbfd..4c6d5f0648 100644
--- a/src/core/dbus-service.c
+++ b/src/core/dbus-service.c
@@ -29,8 +29,7 @@
 #ifdef HAVE_SYSV_COMPAT
 #define BUS_SERVICE_SYSV_INTERFACE_FRAGMENT                            \
         "  <property name=\"SysVStartPriority\" type=\"i\" access=\"read\"/>\n" \
-        "  <property name=\"SysVRunLevels\" type=\"s\" access=\"read\"/>\n" \
-        "  <property name=\"SysVPath\" type=\"s\" access=\"read\"/>\n"
+        "  <property name=\"SysVRunLevels\" type=\"s\" access=\"read\"/>\n"
 #else
 #define BUS_SERVICE_SYSV_INTERFACE_FRAGMENT ""
 #endif
@@ -148,7 +147,6 @@ static const BusProperty bus_service_properties[] = {
 #ifdef HAVE_SYSV_COMPAT
         { "SysVRunLevels",          bus_property_append_string,       "s", offsetof(Service, sysv_runlevels),         true },
         { "SysVStartPriority",      bus_property_append_int,          "i", offsetof(Service, sysv_start_priority)          },
-        { "SysVPath",               bus_property_append_string,       "s", offsetof(Service, sysv_path),              true },
 #endif
         { "FsckPassNo",             bus_property_append_int,          "i", offsetof(Service, fsck_passno)                  },
         { "Result",                 bus_service_append_service_result,"s", offsetof(Service, result)                       },
diff --git a/src/core/dbus-unit.c b/src/core/dbus-unit.c
index 812f1b9f16..f85f3f898a 100644
--- a/src/core/dbus-unit.c
+++ b/src/core/dbus-unit.c
@@ -814,6 +814,7 @@ const BusProperty bus_unit_properties[] = {
         { "ActiveState",          bus_unit_append_active_state,       "s", 0 },
         { "SubState",             bus_unit_append_sub_state,          "s", 0 },
         { "FragmentPath",         bus_property_append_string,         "s", offsetof(Unit, fragment_path),                              true },
+        { "SourcePath",           bus_property_append_string,         "s", offsetof(Unit, source_path),                                true },
         { "UnitFileState",        bus_unit_append_file_state,         "s", 0 },
         { "InactiveExitTimestamp",bus_property_append_usec,           "t", offsetof(Unit, inactive_exit_timestamp.realtime)   },
         { "InactiveExitTimestampMonotonic", bus_property_append_usec, "t", offsetof(Unit, inactive_exit_timestamp.monotonic)  },
diff --git a/src/core/dbus-unit.h b/src/core/dbus-unit.h
index 9680b56f06..ae94ca2c2b 100644
--- a/src/core/dbus-unit.h
+++ b/src/core/dbus-unit.h
@@ -87,6 +87,7 @@
         "  <property name=\"PropagateReloadFrom\" type=\"as\" access=\"read\"/>\n" \
         "  <property name=\"RequiresMountsFor\" type=\"as\" access=\"read\"/>\n" \
         "  <property name=\"Description\" type=\"s\" access=\"read\"/>\n" \
+        "  <property name=\"SourcePath\" type=\"s\" access=\"read\"/>\n" \
         "  <property name=\"Documentation\" type=\"as\" access=\"read\"/>\n" \
         "  <property name=\"LoadState\" type=\"s\" access=\"read\"/>\n" \
         "  <property name=\"ActiveState\" type=\"s\" access=\"read\"/>\n" \
diff --git a/src/core/load-fragment-gperf.gperf.m4 b/src/core/load-fragment-gperf.gperf.m4
index 681f2e9ae0..901c20e78e 100644
--- a/src/core/load-fragment-gperf.gperf.m4
+++ b/src/core/load-fragment-gperf.gperf.m4
@@ -93,6 +93,7 @@ $1.ControlGroupPersistent,       config_parse_tristate,              0,
 Unit.Names,                      config_parse_unit_names,            0,                             0
 Unit.Description,                config_parse_unit_string_printf,    0,                             offsetof(Unit, description)
 Unit.Documentation,              config_parse_documentation,         0,                             offsetof(Unit, documentation)
+Unit.SourcePath,                 config_parse_path,                  0,                             offsetof(Unit, source_path)
 Unit.Requires,                   config_parse_unit_deps,             UNIT_REQUIRES,                 0
 Unit.RequiresOverridable,        config_parse_unit_deps,             UNIT_REQUIRES_OVERRIDABLE,     0
 Unit.Requisite,                  config_parse_unit_deps,             UNIT_REQUISITE,                0
diff --git a/src/core/load-fragment.c b/src/core/load-fragment.c
index 3bc053341c..d2267722dd 100644
--- a/src/core/load-fragment.c
+++ b/src/core/load-fragment.c
@@ -2320,6 +2320,13 @@ static int load_from_path(Unit *u, const char *path) {
 
         u->fragment_mtime = timespec_load(&st.st_mtim);
 
+        if (u->source_path) {
+                if (stat(u->source_path, &st) >= 0)
+                        u->source_mtime = timespec_load(&st.st_mtim);
+                else
+                        u->source_mtime = 0;
+        }
+
         r = 0;
 
 finish:
diff --git a/src/core/service.c b/src/core/service.c
index 5d82e9b545..940d664701 100644
--- a/src/core/service.c
+++ b/src/core/service.c
@@ -264,9 +264,6 @@ static void service_done(Unit *u) {
         s->pid_file = NULL;
 
 #ifdef HAVE_SYSV_COMPAT
-        free(s->sysv_path);
-        s->sysv_path = NULL;
-
         free(s->sysv_runlevels);
         s->sysv_runlevels = NULL;
 #endif
@@ -504,17 +501,21 @@ static int sysv_exec_commands(Service *s) {
         ExecCommand *c;
 
         assert(s);
-        assert(s->sysv_path);
+        assert(s->is_sysv);
+        assert(UNIT(s)->source_path);
 
-        if (!(c = exec_command_new(s->sysv_path, "start")))
+        c = exec_command_new(UNIT(s)->source_path, "start");
+        if (!c)
                 return -ENOMEM;
         exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
 
-        if (!(c = exec_command_new(s->sysv_path, "stop")))
+        c = exec_command_new(UNIT(s)->source_path, "stop");
+        if (!c)
                 return -ENOMEM;
         exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
 
-        if (!(c = exec_command_new(s->sysv_path, "reload")))
+        c = exec_command_new(UNIT(s)->source_path, "reload");
+        if (!c)
                 return -ENOMEM;
         exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
 
@@ -540,7 +541,8 @@ static int service_load_sysv_path(Service *s, const char *path) {
 
         u = UNIT(s);
 
-        if (!(f = fopen(path, "re"))) {
+        f = fopen(path, "re");
+        if (!f) {
                 r = errno == ENOENT ? 0 : -errno;
                 goto finish;
         }
@@ -551,13 +553,13 @@ static int service_load_sysv_path(Service *s, const char *path) {
                 goto finish;
         }
 
-        free(s->sysv_path);
-        if (!(s->sysv_path = strdup(path))) {
+        free(u->source_path);
+        u->source_path = strdup(path);
+        if (!u->source_path) {
                 r = -ENOMEM;
                 goto finish;
         }
-
-        s->sysv_mtime = timespec_load(&st.st_mtim);
+        u->source_mtime = timespec_load(&st.st_mtim);
 
         if (null_or_empty(&st)) {
                 u->load_state = UNIT_MASKED;
@@ -565,6 +567,8 @@ static int service_load_sysv_path(Service *s, const char *path) {
                 goto finish;
         }
 
+        s->is_sysv = true;
+
         while (!feof(f)) {
                 char l[LINE_MAX], *t;
 
@@ -1337,12 +1341,10 @@ static void service_dump(Unit *u, FILE *f, const char *prefix) {
         }
 
 #ifdef HAVE_SYSV_COMPAT
-        if (s->sysv_path)
+        if (s->is_sysv)
                 fprintf(f,
-                        "%sSysV Init Script Path: %s\n"
                         "%sSysV Init Script has LSB Header: %s\n"
                         "%sSysVEnabled: %s\n",
-                        prefix, s->sysv_path,
                         prefix, yes_no(s->sysv_has_lsb),
                         prefix, yes_no(s->sysv_enabled));
 
@@ -2716,7 +2718,7 @@ static bool service_check_gc(Unit *u) {
                 return true;
 
 #ifdef HAVE_SYSV_COMPAT
-        if (s->sysv_path)
+        if (s->is_sysv)
                 return true;
 #endif
 
@@ -3626,29 +3628,6 @@ static void service_reset_failed(Unit *u) {
         s->reload_result = SERVICE_SUCCESS;
 }
 
-static bool service_need_daemon_reload(Unit *u) {
-        Service *s = SERVICE(u);
-
-        assert(s);
-
-#ifdef HAVE_SYSV_COMPAT
-        if (s->sysv_path) {
-                struct stat st;
-
-                zero(st);
-                if (stat(s->sysv_path, &st) < 0)
-                        /* What, cannot access this anymore? */
-                        return true;
-
-                if (s->sysv_mtime > 0 &&
-                    timespec_load(&st.st_mtim) != s->sysv_mtime)
-                        return true;
-        }
-#endif
-
-        return false;
-}
-
 static int service_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
         Service *s = SERVICE(u);
         int r = 0;
@@ -3826,8 +3805,6 @@ const UnitVTable service_vtable = {
 
         .reset_failed = service_reset_failed,
 
-        .need_daemon_reload = service_need_daemon_reload,
-
         .cgroup_notify_empty = service_cgroup_notify_event,
         .notify_message = service_notify_message,
 
diff --git a/src/core/service.h b/src/core/service.h
index 819672f617..f4ccc2b5a0 100644
--- a/src/core/service.h
+++ b/src/core/service.h
@@ -165,14 +165,13 @@ struct Service {
         bool forbid_restart:1;
         bool got_socket_fd:1;
 #ifdef HAVE_SYSV_COMPAT
+        bool is_sysv:1;
         bool sysv_has_lsb:1;
         bool sysv_enabled:1;
         int sysv_start_priority_from_rcnd;
         int sysv_start_priority;
 
-        char *sysv_path;
         char *sysv_runlevels;
-        usec_t sysv_mtime;
 #endif
 
         char *bus_name;
@@ -182,7 +181,6 @@ struct Service {
         RateLimit start_limit;
         StartLimitAction start_limit_action;
 
-
         UnitRef accept_socket;
 
         Watch timer_watch;
diff --git a/src/core/socket.c b/src/core/socket.c
index 2be1647be9..df47578a49 100644
--- a/src/core/socket.c
+++ b/src/core/socket.c
@@ -165,7 +165,7 @@ static int socket_instantiate_service(Socket *s) {
                 return r;
 
 #ifdef HAVE_SYSV_COMPAT
-        if (SERVICE(u)->sysv_path) {
+        if (SERVICE(u)->is_sysv) {
                 log_error("Using SysV services for socket activation is not supported. Refusing.");
                 return -ENOENT;
         }
@@ -1575,7 +1575,7 @@ static int socket_start(Unit *u) {
                 }
 
 #ifdef HAVE_SYSV_COMPAT
-                if (service->sysv_path) {
+                if (service->is_sysv) {
                         log_error("Using SysV services for socket activation is not supported. Refusing.");
                         return -ENOENT;
                 }
diff --git a/src/core/unit.c b/src/core/unit.c
index 1f1a5314f7..f53bdd5a91 100644
--- a/src/core/unit.c
+++ b/src/core/unit.c
@@ -399,6 +399,7 @@ void unit_free(Unit *u) {
         free(u->description);
         strv_free(u->documentation);
         free(u->fragment_path);
+        free(u->source_path);
         free(u->instance);
 
         set_free_free(u->names);
@@ -682,6 +683,9 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) {
         if (u->fragment_path)
                 fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path);
 
+        if (u->source_path)
+                fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path);
+
         if (u->job_timeout > 0)
                 fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout));
 
@@ -2575,11 +2579,11 @@ void unit_status_printf(Unit *u, const char *status, const char *format, ...) {
 }
 
 bool unit_need_daemon_reload(Unit *u) {
+        struct stat st;
+
         assert(u);
 
         if (u->fragment_path) {
-                struct stat st;
-
                 zero(st);
                 if (stat(u->fragment_path, &st) < 0)
                         /* What, cannot access this anymore? */
@@ -2590,8 +2594,15 @@ bool unit_need_daemon_reload(Unit *u) {
                         return true;
         }
 
-        if (UNIT_VTABLE(u)->need_daemon_reload)
-                return UNIT_VTABLE(u)->need_daemon_reload(u);
+        if (u->source_path) {
+                zero(st);
+                if (stat(u->source_path, &st) < 0)
+                        return true;
+
+                if (u->source_mtime > 0 &&
+                    timespec_load(&st.st_mtim) != u->source_mtime)
+                        return true;
+        }
 
         return false;
 }
diff --git a/src/core/unit.h b/src/core/unit.h
index 87dc88c961..cfb38d0aae 100644
--- a/src/core/unit.h
+++ b/src/core/unit.h
@@ -160,7 +160,9 @@ struct Unit {
         char **documentation;
 
         char *fragment_path; /* if loaded from a config file this is the primary path to it */
+        char *source_path; /* if converted, the source file */
         usec_t fragment_mtime;
+        usec_t source_mtime;
 
         /* If there is something to do with this unit, then this is the installed job for it */
         Job *job;
@@ -353,9 +355,6 @@ struct UnitVTable {
         void (*sigchld_event)(Unit *u, pid_t pid, int code, int status);
         void (*timer_event)(Unit *u, uint64_t n_elapsed, Watch *w);
 
-        /* Check whether unit needs a daemon reload */
-        bool (*need_daemon_reload)(Unit *u);
-
         /* Reset failed state if we are in failed state */
         void (*reset_failed)(Unit *u);