#include "macro.h"
#include "strv.h"
#include "load-fragment.h"
+#include "load-dropin.h"
+
+static const NameVTable * const name_vtable[_NAME_TYPE_MAX] = {
+ [NAME_SERVICE] = &service_vtable,
+ [NAME_TIMER] = &timer_vtable,
+ [NAME_SOCKET] = &socket_vtable,
+ [NAME_MILESTONE] = &milestone_vtable,
+ [NAME_DEVICE] = &device_vtable,
+ [NAME_MOUNT] = &mount_vtable,
+ [NAME_AUTOMOUNT] = &automount_vtable,
+ [NAME_SNAPSHOT] = &snapshot_vtable
+};
+
+#define NAME_VTABLE(n) name_vtable[(n)->meta.type]
NameType name_type_from_string(const char *n) {
NameType t;
- static const char* suffixes[_NAME_TYPE_MAX] = {
- [NAME_SERVICE] = ".service",
- [NAME_TIMER] = ".timer",
- [NAME_SOCKET] = ".socket",
- [NAME_MILESTONE] = ".milestone",
- [NAME_DEVICE] = ".device",
- [NAME_MOUNT] = ".mount",
- [NAME_AUTOMOUNT] = ".automount",
- [NAME_SNAPSHOT] = ".snapshot",
- };
assert(n);
for (t = 0; t < _NAME_TYPE_MAX; t++)
- if (endswith(n, suffixes[t]))
+ if (endswith(n, name_vtable[t]->suffix))
return t;
return _NAME_TYPE_INVALID;
assert(n);
+ if (strlen(n) >= NAME_MAX)
+ return false;
+
t = name_type_from_string(n);
if (t < 0 || t >= _NAME_TYPE_MAX)
return false;
/* Not much initialization happening here at this time */
n->meta.manager = m;
n->meta.type = _NAME_TYPE_INVALID;
- n->meta.state = NAME_STUB;
/* We don't link the name here, that is left for name_link() */
return r;
}
- if (n->meta.state == NAME_STUB)
+ if (n->meta.load_state == NAME_STUB)
LIST_PREPEND(Meta, n->meta.manager->load_queue, &n->meta);
return 0;
SET_FOREACH(t, name->meta.names, state)
hashmap_remove_value(name->meta.manager->names, t, name);
- if (name->meta.state == NAME_STUB)
+ if (name->meta.load_state == NAME_STUB)
LIST_REMOVE(Meta, name->meta.manager->load_queue, &name->meta);
}
for (d = 0; d < _NAME_DEPENDENCY_MAX; d++)
bidi_set_free(name, name->meta.dependencies[d]);
- switch (name->meta.type) {
-
- case NAME_SOCKET: {
- unsigned i;
- Socket *s = SOCKET(name);
-
- for (i = 0; i < s->n_fds; i++)
- close_nointr(s->fds[i]);
- break;
- }
-
- case NAME_DEVICE: {
- Device *d = DEVICE(name);
-
- free(d->sysfs);
- break;
- }
-
- case NAME_MOUNT: {
- Mount *m = MOUNT(name);
-
- free(m->path);
- break;
- }
-
- case NAME_AUTOMOUNT: {
- Automount *a = AUTOMOUNT(name);
-
- free(a->path);
- break;
- }
-
- default:
- ;
- }
+ if (NAME_VTABLE(name)->free_hook)
+ NAME_VTABLE(name)->free_hook(name);
free(name->meta.description);
free(name);
}
-bool name_is_ready(Name *name) {
+NameActiveState name_active_state(Name *name) {
assert(name);
- if (name->meta.state != NAME_LOADED)
- return false;
-
- assert(name->meta.type < _NAME_TYPE_MAX);
+ if (name->meta.load_state != NAME_LOADED)
+ return NAME_INACTIVE;
- switch (name->meta.type) {
- case NAME_SERVICE: {
- Service *s = SERVICE(name);
-
- return
- s->state == SERVICE_RUNNING ||
- s->state == SERVICE_RELOAD_PRE ||
- s->state == SERVICE_RELOAD ||
- s->state == SERVICE_RELOAD_POST;
- }
-
- case NAME_TIMER: {
- Timer *t = TIMER(name);
-
- return
- t->state == TIMER_WAITING ||
- t->state == TIMER_RUNNING;
- }
-
- case NAME_SOCKET: {
- Socket *s = SOCKET(name);
-
- return
- s->state == SOCKET_LISTENING ||
- s->state == SOCKET_RUNNING;
- }
-
- case NAME_MILESTONE:
- return MILESTONE(name)->state == MILESTONE_ACTIVE;
-
- case NAME_DEVICE:
- return DEVICE(name)->state == DEVICE_AVAILABLE;
-
- case NAME_MOUNT:
- return MOUNT(name)->state == MOUNT_MOUNTED;
-
- case NAME_AUTOMOUNT: {
- Automount *a = AUTOMOUNT(name);
-
- return
- a->state == AUTOMOUNT_WAITING ||
- a->state == AUTOMOUNT_RUNNING;
- }
-
- case NAME_SNAPSHOT:
- return SNAPSHOT(name)->state == SNAPSHOT_ACTIVE;
-
-
- case _NAME_TYPE_MAX:
- case _NAME_TYPE_INVALID:
- ;
- }
-
- assert_not_reached("Unknown name type.");
- return false;
+ return NAME_VTABLE(name)->active_state(name);
}
-bool name_is_dead(Name *name) {
- assert(name);
-
- if (name->meta.state != NAME_LOADED)
- return true;
- assert(name->meta.type < _NAME_TYPE_MAX);
-
- switch (name->meta.type) {
- case NAME_SERVICE: {
- Service *s = SERVICE(name);
-
- return
- s->state == SERVICE_DEAD ||
- s->state == SERVICE_MAINTAINANCE;
- }
-
- case NAME_TIMER:
- return TIMER(name)->state == TIMER_DEAD;
-
- case NAME_SOCKET: {
- Socket *s = SOCKET(name);
-
- return
- s->state == SOCKET_DEAD ||
- s->state == SOCKET_MAINTAINANCE;
- }
-
- case NAME_MILESTONE:
- return MILESTONE(name)->state == MILESTONE_DEAD;
-
- case NAME_DEVICE:
- return DEVICE(name)->state == DEVICE_DEAD;
-
- case NAME_MOUNT: {
- Mount *a = MOUNT(name);
-
- return
- a->state == AUTOMOUNT_DEAD ||
- a->state == AUTOMOUNT_MAINTAINANCE;
- }
-
- case NAME_AUTOMOUNT: {
- Automount *a = AUTOMOUNT(name);
-
- return
- a->state == AUTOMOUNT_DEAD ||
- a->state == AUTOMOUNT_MAINTAINANCE;
- }
-
- case NAME_SNAPSHOT:
- return SNAPSHOT(name)->state == SNAPSHOT_DEAD;
-
-
- case _NAME_TYPE_MAX:
- case _NAME_TYPE_INVALID:
- ;
- }
-
- assert_not_reached("Unknown name type.");
- return false;
-}
-
-
static int ensure_in_set(Set **s, void *data) {
int r;
if (name->meta.type != other->meta.type)
return -EINVAL;
- if (other->meta.state != NAME_STUB)
+ if (other->meta.load_state != NAME_STUB)
return -EINVAL;
/* Merge names */
if ((r = ensure_in_set(&other->meta.dependencies[NAME_REQUIRED_BY], n)) < 0)
return r;
- SET_FOREACH(other, n->meta.dependencies[NAME_WANTS], state)
- if ((r = ensure_in_set(&other->meta.dependencies[NAME_WANTED_BY], n)) < 0)
- return r;
SET_FOREACH(other, n->meta.dependencies[NAME_SOFT_REQUIRES], state)
- if ((r = ensure_in_set(&other->meta.dependencies[NAME_WANTED_BY], n)) < 0)
+ if ((r = ensure_in_set(&other->meta.dependencies[NAME_SOFT_REQUIRED_BY], n)) < 0)
return r;
- SET_FOREACH(other, n->meta.dependencies[NAME_SOFT_REQUISITE], state)
+
+ SET_FOREACH(other, n->meta.dependencies[NAME_WANTS], state)
if ((r = ensure_in_set(&other->meta.dependencies[NAME_WANTED_BY], n)) < 0)
return r;
return set_first(n->meta.names);
}
+const char *name_description(Name *n) {
+ assert(n);
+
+ if (n->meta.description)
+ return n->meta.description;
+
+ return name_id(n);
+}
+
void name_dump(Name *n, FILE *f, const char *prefix) {
- static const char* const state_table[_NAME_STATE_MAX] = {
+ static const char* const load_state_table[_NAME_LOAD_STATE_MAX] = {
[NAME_STUB] = "stub",
[NAME_LOADED] = "loaded",
[NAME_FAILED] = "failed"
};
- static const char* const socket_state_table[_SOCKET_STATE_MAX] = {
- [SOCKET_DEAD] = "dead",
- [SOCKET_BEFORE] = "before",
- [SOCKET_START_PRE] = "start-pre",
- [SOCKET_START] = "start",
- [SOCKET_START_POST] = "start-post",
- [SOCKET_LISTENING] = "listening",
- [SOCKET_RUNNING] = "running",
- [SOCKET_STOP_PRE] = "stop-pre",
- [SOCKET_STOP] = "stop",
- [SOCKET_STOP_POST] = "stop-post",
- [SOCKET_MAINTAINANCE] = "maintainance"
+ static const char* const active_state_table[_NAME_ACTIVE_STATE_MAX] = {
+ [NAME_ACTIVE] = "active",
+ [NAME_INACTIVE] = "inactive",
+ [NAME_ACTIVATING] = "activating",
+ [NAME_DEACTIVATING] = "deactivating"
};
static const char* const dependency_table[_NAME_DEPENDENCY_MAX] = {
[NAME_REQUISITE] = "Requisite",
[NAME_SOFT_REQUISITE] = "SoftRequisite",
[NAME_REQUIRED_BY] = "RequiredBy",
- [NAME_WANTED_BY] = "WantedBy",
+ [NAME_SOFT_REQUIRED_BY] = "SoftRequiredBy",
[NAME_CONFLICTS] = "Conflicts",
[NAME_BEFORE] = "Before",
[NAME_AFTER] = "After",
fprintf(f,
"%sName %s:\n"
"%s\tDescription: %s\n"
- "%s\tName State: %s\n",
+ "%s\tName Load State: %s\n"
+ "%s\tName Active State: %s\n",
prefix, name_id(n),
- prefix, n->meta.description ? n->meta.description : name_id(n),
- prefix, state_table[n->meta.state]);
+ prefix, name_description(n),
+ prefix, load_state_table[n->meta.load_state],
+ prefix, active_state_table[name_active_state(n)]);
- fprintf(f, "%s\tNames: ", prefix);
SET_FOREACH(t, n->meta.names, state)
- fprintf(f, "%s ", t);
- fprintf(f, "\n");
+ fprintf(f, "%s\tName: %s\n", prefix, t);
for (d = 0; d < _NAME_DEPENDENCY_MAX; d++) {
void *state;
if (set_isempty(n->meta.dependencies[d]))
continue;
- fprintf(f, "%s\t%s: ", prefix, dependency_table[d]);
-
SET_FOREACH(other, n->meta.dependencies[d], state)
- fprintf(f, "%s ", name_id(other));
-
- fprintf(f, "\n");
+ fprintf(f, "%s\t%s: %s\n", prefix, dependency_table[d], name_id(other));
}
-
- switch (n->meta.type) {
- case NAME_SOCKET: {
- int r;
- char *s = NULL;
- const char *t;
-
- if ((r = address_print(&n->socket.address, &s)) < 0)
- t = strerror(-r);
- else
- t = s;
-
- fprintf(f,
- "%s\tAddress: %s\n"
- "%s\tSocket State: %s\n",
- prefix, t,
- prefix, socket_state_table[n->socket.state]);
-
- free(s);
- break;
- }
-
- default:
- ;
- }
+ if (NAME_VTABLE(n)->dump)
+ NAME_VTABLE(n)->dump(n, f, prefix);
if (n->meta.job) {
char *p;
return 0;
}
-static int service_load_sysv(Service *s) {
- assert(s);
+/* Common implementation for multiple backends */
+int name_load_fragment_and_dropin(Name *n) {
+ int r;
- /* Load service data from SysV init scripts, preferably with
- * LSB headers ... */
+ assert(n);
- return -ENOENT;
+ /* Load a .socket file */
+ if ((r = name_load_fragment(n)) < 0)
+ return r;
+
+ /* Load drop-in directory data */
+ if ((r = name_load_dropin(n)) < 0)
+ return r;
+
+ return 0;
}
-static int name_load_fstab(Name *n) {
- assert(n);
- assert(n->meta.type == NAME_MOUNT || n->meta.type == NAME_AUTOMOUNT);
+int name_load(Name *name) {
+ int r;
+
+ assert(name);
+
+ if (name->meta.load_state != NAME_STUB)
+ return 0;
- /* Load mount data from /etc/fstab */
+ if ((r = verify_type(name)) < 0)
+ return r;
+
+ if (NAME_VTABLE(name)->load)
+ if ((r = NAME_VTABLE(name)->load(name)) < 0)
+ goto fail;
+ if ((r = name_sanitize(name)) < 0)
+ goto fail;
+
+ if ((r = name_link_names(name, false)) < 0)
+ goto fail;
+
+ name->meta.load_state = NAME_LOADED;
return 0;
+
+fail:
+ name->meta.load_state = NAME_FAILED;
+ return r;
}
-static int snapshot_load(Snapshot *s) {
- assert(s);
+/* Errors:
+ * -EBADR: This name type does not support starting.
+ * -EALREADY: Name is already started.
+ * -EAGAIN: An operation is already in progress. Retry later.
+ */
+int name_start(Name *n) {
+ NameActiveState state;
+
+ assert(n);
- /* Load snapshots from disk */
+ if (!NAME_VTABLE(n)->start)
+ return -EBADR;
- return 0;
+ state = name_active_state(n);
+ if (NAME_IS_ACTIVE_OR_RELOADING(state))
+ return -EALREADY;
+
+ if (state == NAME_ACTIVATING)
+ return 0;
+
+ return NAME_VTABLE(n)->start(n);
}
-static int name_load_dropin(Name *n) {
+bool name_type_can_start(NameType t) {
+ assert(t >= 0 && t < _NAME_TYPE_MAX);
+
+ return !!name_vtable[t]->start;
+}
+
+/* Errors:
+ * -EBADR: This name type does not support stopping.
+ * -EALREADY: Name is already stopped.
+ * -EAGAIN: An operation is already in progress. Retry later.
+ */
+int name_stop(Name *n) {
+ NameActiveState state;
+
assert(n);
- /* Load dependencies from drop-in directories */
+ if (!NAME_VTABLE(n)->stop)
+ return -EBADR;
- return 0;
+ state = name_active_state(n);
+ if (state == NAME_INACTIVE)
+ return -EALREADY;
+
+ if (state == NAME_DEACTIVATING)
+ return 0;
+
+ return NAME_VTABLE(n)->stop(n);
}
-int name_load(Name *name) {
- int r;
+/* Errors:
+ * -EBADR: This name type does not support reloading.
+ * -ENOEXEC: Name is not started.
+ * -EAGAIN: An operation is already in progress. Retry later.
+ */
+int name_reload(Name *n) {
+ NameActiveState state;
- assert(name);
+ assert(n);
+
+ if (!NAME_VTABLE(n)->reload)
+ return -EBADR;
+
+ state = name_active_state(n);
+ if (name_active_state(n) == NAME_ACTIVE_RELOADING)
+ return -EALREADY;
+
+ if (name_active_state(n) != NAME_ACTIVE)
+ return -ENOEXEC;
+
+ return NAME_VTABLE(n)->reload(n);
+}
- if (name->meta.state != NAME_STUB)
+bool name_type_can_reload(NameType t) {
+ assert(t >= 0 && t < _NAME_TYPE_MAX);
+ return !!name_vtable[t]->reload;
+}
+
+static void retroactively_start_dependencies(Name *n) {
+ void *state;
+ Name *other;
+
+ assert(n);
+ assert(NAME_IS_ACTIVE_OR_ACTIVATING(name_active_state(n)));
+
+ SET_FOREACH(other, n->meta.dependencies[NAME_REQUIRES], state)
+ if (!NAME_IS_ACTIVE_OR_ACTIVATING(name_active_state(other)))
+ manager_add_job(n->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL);
+
+ SET_FOREACH(other, n->meta.dependencies[NAME_SOFT_REQUIRES], state)
+ if (!NAME_IS_ACTIVE_OR_ACTIVATING(name_active_state(other)))
+ manager_add_job(n->meta.manager, JOB_START, other, JOB_FAIL, false, NULL);
+
+ SET_FOREACH(other, n->meta.dependencies[NAME_REQUISITE], state)
+ if (!NAME_IS_ACTIVE_OR_ACTIVATING(name_active_state(other)))
+ manager_add_job(n->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL);
+
+ SET_FOREACH(other, n->meta.dependencies[NAME_WANTS], state)
+ if (!NAME_IS_ACTIVE_OR_ACTIVATING(name_active_state(other)))
+ manager_add_job(n->meta.manager, JOB_START, other, JOB_FAIL, false, NULL);
+
+ SET_FOREACH(other, n->meta.dependencies[NAME_CONFLICTS], state)
+ if (!NAME_IS_ACTIVE_OR_ACTIVATING(name_active_state(other)))
+ manager_add_job(n->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL);
+}
+
+static void retroactively_stop_dependencies(Name *n) {
+ void *state;
+ Name *other;
+
+ assert(n);
+ assert(NAME_IS_INACTIVE_OR_DEACTIVATING(name_active_state(n)));
+
+ SET_FOREACH(other, n->meta.dependencies[NAME_REQUIRED_BY], state)
+ if (!NAME_IS_INACTIVE_OR_DEACTIVATING(name_active_state(other)))
+ manager_add_job(n->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL);
+}
+
+int name_notify(Name *n, NameActiveState os, NameActiveState ns) {
+ assert(n);
+ assert(os < _NAME_ACTIVE_STATE_MAX);
+ assert(ns < _NAME_ACTIVE_STATE_MAX);
+ assert(!(os == NAME_ACTIVE && ns == NAME_ACTIVATING));
+ assert(!(os == NAME_INACTIVE && ns == NAME_DEACTIVATING));
+
+ if (os == ns)
return 0;
- if ((r = verify_type(name)) < 0)
- return r;
+ if (n->meta.job) {
- if (name->meta.type == NAME_SERVICE) {
+ if (n->meta.job->state == JOB_WAITING)
- /* Load a .service file */
- if ((r = name_load_fragment(name)) == 0)
- goto finish;
+ /* So we reached a different state for this
+ * job. Let's see if we can run it now if it
+ * failed previously due to EAGAIN. */
+ job_run_and_invalidate(n->meta.job);
- /* Load a classic init script */
- if (r == -ENOENT)
- if ((r = service_load_sysv(SERVICE(name))) == 0)
- goto finish;
+ else {
+ assert(n->meta.job->state == JOB_RUNNING);
- } else if (name->meta.type == NAME_MOUNT ||
- name->meta.type == NAME_AUTOMOUNT) {
+ /* Let's check of this state change
+ * constitutes a finished job, or maybe
+ * cotradicts a running job and hence needs to
+ * invalidate jobs. */
- if ((r = name_load_fstab(name)) == 0)
- goto finish;
+ switch (n->meta.job->type) {
- } else if (name->meta.type == NAME_SNAPSHOT) {
+ case JOB_START:
+ case JOB_VERIFY_ACTIVE:
- if ((r = snapshot_load(SNAPSHOT(name))) == 0)
- goto finish;
+ if (NAME_IS_ACTIVE_OR_RELOADING(ns))
+ return job_finish_and_invalidate(n->meta.job, true);
+ else if (ns == NAME_ACTIVATING)
+ return 0;
+ else
+ job_finish_and_invalidate(n->meta.job, false);
- } else {
- if ((r = name_load_fragment(name)) == 0)
- goto finish;
- }
+ break;
- name->meta.state = NAME_FAILED;
- return r;
+ case JOB_RELOAD:
+ case JOB_RELOAD_OR_START:
-finish:
- if ((r = name_load_dropin(name)) < 0)
- return r;
+ if (ns == NAME_ACTIVE)
+ return job_finish_and_invalidate(n->meta.job, true);
+ else if (ns == NAME_ACTIVATING || ns == NAME_ACTIVE_RELOADING)
+ return 0;
+ else
+ job_finish_and_invalidate(n->meta.job, false);
- if ((r = name_sanitize(name)) < 0)
- return r;
+ break;
- if ((r = name_link_names(name, false)) < 0)
- return r;
+ case JOB_STOP:
+ case JOB_RESTART:
+ case JOB_TRY_RESTART:
+
+ if (ns == NAME_INACTIVE)
+ return job_finish_and_invalidate(n->meta.job, true);
+ else if (ns == NAME_DEACTIVATING)
+ return 0;
+ else
+ job_finish_and_invalidate(n->meta.job, false);
+
+ break;
+
+ default:
+ assert_not_reached("Job type unknown");
+ }
+ }
+ }
+
+ /* If this state change happened without being requested by a
+ * job, then let's retroactively start or stop dependencies */
+
+ if (NAME_IS_INACTIVE_OR_DEACTIVATING(os) && NAME_IS_ACTIVE_OR_ACTIVATING(ns))
+ retroactively_start_dependencies(n);
+ else if (NAME_IS_ACTIVE_OR_ACTIVATING(os) && NAME_IS_INACTIVE_OR_DEACTIVATING(ns))
+ retroactively_stop_dependencies(n);
- name->meta.state = NAME_LOADED;
return 0;
}
~ianmdlvl / elogind.git / blobdiff