#include <assert.h>
#include <errno.h>
#include <string.h>
+#include <sys/epoll.h>
+#include <sys/timerfd.h>
+#include <sys/poll.h>
#include "set.h"
#include "name.h"
#include "strv.h"
#include "load-fragment.h"
#include "load-dropin.h"
+#include "log.h"
-static const NameVTable * const name_vtable[_NAME_TYPE_MAX] = {
+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_TARGET] = &target_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;
return NULL;
}
- /* Not much initialization happening here at this time */
n->meta.manager = m;
n->meta.type = _NAME_TYPE_INVALID;
return n;
}
+int name_add_name(Name *n, const char *text) {
+ NameType t;
+ char *s;
+ int r;
+
+ assert(n);
+ assert(text);
+
+ if ((t = name_type_from_string(text)) == _NAME_TYPE_INVALID)
+ return -EINVAL;
+
+ if (n->meta.type != _NAME_TYPE_INVALID && t != n->meta.type)
+ return -EINVAL;
+
+ if (!(s = strdup(text)))
+ return -ENOMEM;
+
+ if ((r = set_put(n->meta.names, s)) < 0) {
+ free(s);
+ return r;
+ }
+
+ n->meta.type = t;
+
+ if (!n->meta.id)
+ n->meta.id = s;
+
+ return 0;
+}
+
/* FIXME: Does not rollback on failure! */
int name_link_names(Name *n, bool replace) {
char *t;
- void *state;
+ Iterator i;
int r;
assert(n);
/* Link all names that aren't linked yet. */
- SET_FOREACH(t, n->meta.names, state)
+ SET_FOREACH(t, n->meta.names, i)
if (replace) {
if ((r = hashmap_replace(n->meta.manager->names, t, n)) < 0)
return r;
if ((r = name_link_names(n, false)) < 0) {
char *t;
- void *state;
+ Iterator i;
/* Rollback the registered names */
- SET_FOREACH(t, n->meta.names, state)
+ SET_FOREACH(t, n->meta.names, i)
hashmap_remove_value(n->meta.manager->names, t, n);
n->meta.linked = false;
return r;
}
- if (n->meta.load_state == NAME_STUB)
- LIST_PREPEND(Meta, n->meta.manager->load_queue, &n->meta);
+ if (n->meta.load_state == NAME_STUB) {
+ LIST_PREPEND(Meta, load_queue, n->meta.manager->load_queue, &n->meta);
+ n->meta.in_load_queue = true;
+ }
return 0;
}
static void bidi_set_free(Name *name, Set *s) {
- void *state;
+ Iterator i;
Name *other;
assert(name);
/* Frees the set and makes sure we are dropped from the
* inverse pointers */
- SET_FOREACH(other, s, state) {
- NameDependency d;
+ if (name->meta.linked) {
+ SET_FOREACH(other, s, i) {
+ NameDependency d;
- for (d = 0; d < _NAME_DEPENDENCY_MAX; d++)
- set_remove(other->meta.dependencies[d], name);
+ for (d = 0; d < _NAME_DEPENDENCY_MAX; d++)
+ set_remove(other->meta.dependencies[d], name);
+ }
}
set_free(s);
/* Detach from next 'bigger' objects */
if (name->meta.linked) {
char *t;
- void *state;
+ Iterator i;
- SET_FOREACH(t, name->meta.names, state)
+ SET_FOREACH(t, name->meta.names, i)
hashmap_remove_value(name->meta.manager->names, t, name);
- if (name->meta.load_state == NAME_STUB)
- LIST_REMOVE(Meta, name->meta.manager->load_queue, &name->meta);
+ if (name->meta.in_load_queue)
+ LIST_REMOVE(Meta, load_queue, name->meta.manager->load_queue, &name->meta);
}
+ if (name->meta.load_state == NAME_LOADED)
+ if (NAME_VTABLE(name)->done)
+ NAME_VTABLE(name)->done(name);
+
/* Free data and next 'smaller' objects */
if (name->meta.job)
job_free(name->meta.job);
for (d = 0; d < _NAME_DEPENDENCY_MAX; d++)
bidi_set_free(name, name->meta.dependencies[d]);
- if (NAME_VTABLE(name)->free_hook)
- NAME_VTABLE(name)->free_hook(name);
-
free(name->meta.description);
while ((t = set_steal_first(name->meta.names)))
return NAME_VTABLE(name)->active_state(name);
}
-static int ensure_in_set(Set **s, void *data) {
- int r;
-
- assert(s);
- assert(data);
-
- if (!*s)
- if (!(*s = set_new(trivial_hash_func, trivial_compare_func)))
- return -ENOMEM;
-
- if ((r = set_put(*s, data)) < 0)
- if (r != -EEXIST)
- return r;
-
- return 0;
-}
-
static int ensure_merge(Set **s, Set *other) {
if (!other)
/* Merge dependencies */
for (d = 0; d < _NAME_DEPENDENCY_MAX; d++)
+ /* fixme, the inverse mapping is missing */
if ((r = ensure_merge(&name->meta.dependencies[d], other->meta.dependencies[d])) < 0)
return r;
return 0;
}
-/* FIXME: Does not rollback on failure! */
-static int augment(Name *n) {
- int r;
- void* state;
- Name *other;
-
- assert(n);
-
- /* Adds in the missing links to make all dependencies
- * bidirectional. */
-
- SET_FOREACH(other, n->meta.dependencies[NAME_BEFORE], state)
- if ((r = ensure_in_set(&other->meta.dependencies[NAME_AFTER], n)) < 0)
- return r;
- SET_FOREACH(other, n->meta.dependencies[NAME_AFTER], state)
- if ((r = ensure_in_set(&other->meta.dependencies[NAME_BEFORE], n)) < 0)
- return r;
-
- SET_FOREACH(other, n->meta.dependencies[NAME_CONFLICTS], state)
- if ((r = ensure_in_set(&other->meta.dependencies[NAME_CONFLICTS], n)) < 0)
- return r;
-
- SET_FOREACH(other, n->meta.dependencies[NAME_REQUIRES], state)
- if ((r = ensure_in_set(&other->meta.dependencies[NAME_REQUIRED_BY], n)) < 0)
- return r;
- SET_FOREACH(other, n->meta.dependencies[NAME_REQUISITE], state)
- if ((r = ensure_in_set(&other->meta.dependencies[NAME_REQUIRED_BY], n)) < 0)
- return r;
-
- SET_FOREACH(other, n->meta.dependencies[NAME_SOFT_REQUIRES], state)
- if ((r = ensure_in_set(&other->meta.dependencies[NAME_SOFT_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;
-
- return 0;
-}
-
int name_sanitize(Name *n) {
NameDependency d;
for (d = 0; d < _NAME_DEPENDENCY_MAX; d++)
set_remove(n->meta.dependencies[d], n);
- return augment(n);
+ return 0;
}
const char* name_id(Name *n) {
assert(n);
+ if (n->meta.id)
+ return n->meta.id;
+
return set_first(n->meta.names);
}
[NAME_SOFT_REQUISITE] = "SoftRequisite",
[NAME_REQUIRED_BY] = "RequiredBy",
[NAME_SOFT_REQUIRED_BY] = "SoftRequiredBy",
+ [NAME_WANTED_BY] = "WantedBy",
[NAME_CONFLICTS] = "Conflicts",
[NAME_BEFORE] = "Before",
[NAME_AFTER] = "After",
};
- void *state;
char *t;
NameDependency d;
+ Iterator i;
+ char *prefix2;
assert(n);
if (!prefix)
prefix = "";
+ prefix2 = strappend(prefix, "\t");
+ if (!prefix2)
+ prefix2 = "";
fprintf(f,
- "%sName %s:\n"
+ "%s→ Name %s:\n"
"%s\tDescription: %s\n"
"%s\tName Load State: %s\n"
"%s\tName Active State: %s\n",
prefix, load_state_table[n->meta.load_state],
prefix, active_state_table[name_active_state(n)]);
- SET_FOREACH(t, n->meta.names, state)
+ SET_FOREACH(t, n->meta.names, i)
fprintf(f, "%s\tName: %s\n", prefix, t);
for (d = 0; d < _NAME_DEPENDENCY_MAX; d++) {
- void *state;
Name *other;
if (set_isempty(n->meta.dependencies[d]))
continue;
- SET_FOREACH(other, n->meta.dependencies[d], state)
+ SET_FOREACH(other, n->meta.dependencies[d], i)
fprintf(f, "%s\t%s: %s\n", prefix, dependency_table[d], name_id(other));
}
if (NAME_VTABLE(n)->dump)
- NAME_VTABLE(n)->dump(n, f, prefix);
+ NAME_VTABLE(n)->dump(n, f, prefix2);
- if (n->meta.job) {
- char *p;
+ if (n->meta.job)
+ job_dump(n->meta.job, f, prefix2);
- if (asprintf(&p, "%s\t", prefix) >= 0)
- prefix = p;
- else
- p = NULL;
-
- job_dump(n->meta.job, f, prefix);
- free(p);
- }
+ free(prefix2);
}
static int verify_type(Name *name) {
char *n;
- void *state;
+ Iterator i;
assert(name);
/* Checks that all aliases of this name have the same and valid type */
- SET_FOREACH(n, name->meta.names, state) {
+ SET_FOREACH(n, name->meta.names, i) {
NameType t;
if ((t = name_type_from_string(n)) == _NAME_TYPE_INVALID)
assert(name);
+ if (name->meta.in_load_queue) {
+ LIST_REMOVE(Meta, load_queue, name->meta.manager->load_queue, &name->meta);
+ name->meta.in_load_queue = false;
+ }
+
if (name->meta.load_state != NAME_STUB)
return 0;
if ((r = verify_type(name)) < 0)
return r;
- if (NAME_VTABLE(name)->load)
- if ((r = NAME_VTABLE(name)->load(name)) < 0)
+ if (NAME_VTABLE(name)->init)
+ if ((r = NAME_VTABLE(name)->init(name)) < 0)
goto fail;
if ((r = name_sanitize(name)) < 0)
- goto fail;
+ goto fail_undo_init;
if ((r = name_link_names(name, false)) < 0)
- goto fail;
+ goto fail_undo_init;
name->meta.load_state = NAME_LOADED;
return 0;
+fail_undo_init:
+ if (NAME_VTABLE(name)->done)
+ NAME_VTABLE(name)->done(name);
+
fail:
name->meta.load_state = NAME_FAILED;
return r;
if (NAME_IS_ACTIVE_OR_RELOADING(state))
return -EALREADY;
- if (state == NAME_ACTIVATING)
- return 0;
+ /* We don't suppress calls to ->start() here when we are
+ * already starting, to allow this request to be used as a
+ * "hurry up" call, for example when the name is in some "auto
+ * restart" state where it waits for a holdoff timer to elapse
+ * before it will start again. */
return NAME_VTABLE(n)->start(n);
}
assert(n);
- if (!NAME_VTABLE(n)->reload)
+ if (!name_can_reload(n))
return -EBADR;
state = name_active_state(n);
bool name_type_can_reload(NameType t) {
assert(t >= 0 && t < _NAME_TYPE_MAX);
+
return !!name_vtable[t]->reload;
}
+bool name_can_reload(Name *n) {
+ assert(n);
+
+ if (!name_type_can_reload(n->meta.type))
+ return false;
+
+ if (!NAME_VTABLE(n)->can_reload)
+ return true;
+
+ return NAME_VTABLE(n)->can_reload(n);
+}
+
static void retroactively_start_dependencies(Name *n) {
- void *state;
+ Iterator i;
Name *other;
assert(n);
assert(NAME_IS_ACTIVE_OR_ACTIVATING(name_active_state(n)));
- SET_FOREACH(other, n->meta.dependencies[NAME_REQUIRES], state)
+ SET_FOREACH(other, n->meta.dependencies[NAME_REQUIRES], i)
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)
+ SET_FOREACH(other, n->meta.dependencies[NAME_SOFT_REQUIRES], i)
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)
+ SET_FOREACH(other, n->meta.dependencies[NAME_REQUISITE], i)
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)
+ SET_FOREACH(other, n->meta.dependencies[NAME_WANTS], i)
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)
+ SET_FOREACH(other, n->meta.dependencies[NAME_CONFLICTS], i)
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;
+ Iterator i;
Name *other;
assert(n);
assert(NAME_IS_INACTIVE_OR_DEACTIVATING(name_active_state(n)));
- SET_FOREACH(other, n->meta.dependencies[NAME_REQUIRED_BY], state)
+ SET_FOREACH(other, n->meta.dependencies[NAME_REQUIRED_BY], i)
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) {
+void 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_INACTIVE && ns == NAME_DEACTIVATING));
if (os == ns)
- return 0;
+ return;
+
+ if (!NAME_IS_ACTIVE_OR_RELOADING(os) && NAME_IS_ACTIVE_OR_RELOADING(ns))
+ n->meta.active_enter_timestamp = now(CLOCK_REALTIME);
+ else if (NAME_IS_ACTIVE_OR_RELOADING(os) && !NAME_IS_ACTIVE_OR_RELOADING(ns))
+ n->meta.active_exit_timestamp = now(CLOCK_REALTIME);
if (n->meta.job) {
/* 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);
+ job_schedule_run(n->meta.job);
else {
assert(n->meta.job->state == JOB_RUNNING);
case JOB_START:
case JOB_VERIFY_ACTIVE:
- if (NAME_IS_ACTIVE_OR_RELOADING(ns))
- return job_finish_and_invalidate(n->meta.job, true);
- else if (ns == NAME_ACTIVATING)
- return 0;
+ if (NAME_IS_ACTIVE_OR_RELOADING(ns)) {
+ job_finish_and_invalidate(n->meta.job, true);
+ return;
+ } else if (ns == NAME_ACTIVATING)
+ return;
else
job_finish_and_invalidate(n->meta.job, false);
case JOB_RELOAD:
case JOB_RELOAD_OR_START:
- if (ns == NAME_ACTIVE)
- return job_finish_and_invalidate(n->meta.job, true);
- else if (ns == NAME_ACTIVATING || ns == NAME_ACTIVE_RELOADING)
- return 0;
+ if (ns == NAME_ACTIVE) {
+ job_finish_and_invalidate(n->meta.job, true);
+ return;
+ } else if (ns == NAME_ACTIVATING || ns == NAME_ACTIVE_RELOADING)
+ return;
else
job_finish_and_invalidate(n->meta.job, false);
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;
+ if (ns == NAME_INACTIVE) {
+ job_finish_and_invalidate(n->meta.job, true);
+ return;
+ } else if (ns == NAME_DEACTIVATING)
+ return;
else
job_finish_and_invalidate(n->meta.job, false);
retroactively_start_dependencies(n);
else if (NAME_IS_ACTIVE_OR_ACTIVATING(os) && NAME_IS_INACTIVE_OR_DEACTIVATING(ns))
retroactively_stop_dependencies(n);
+}
+
+int name_watch_fd(Name *n, int fd, uint32_t events) {
+ struct epoll_event ev;
+
+ assert(n);
+ assert(fd >= 0);
+
+ zero(ev);
+ ev.data.fd = fd;
+ ev.data.ptr = n;
+ ev.data.u32 = MANAGER_FD;
+ ev.events = events;
+
+ if (epoll_ctl(n->meta.manager->epoll_fd, EPOLL_CTL_ADD, fd, &ev) >= 0)
+ return 0;
+
+ if (errno == EEXIST)
+ if (epoll_ctl(n->meta.manager->epoll_fd, EPOLL_CTL_MOD, fd, &ev) >= 0)
+ return 0;
+
+ return -errno;
+}
+
+void name_unwatch_fd(Name *n, int fd) {
+ assert(n);
+ assert(fd >= 0);
+
+ assert_se(epoll_ctl(n->meta.manager->epoll_fd, EPOLL_CTL_DEL, fd, NULL) >= 0 || errno == ENOENT);
+}
+
+int name_watch_pid(Name *n, pid_t pid) {
+ assert(n);
+ assert(pid >= 1);
+
+ return hashmap_put(n->meta.manager->watch_pids, UINT32_TO_PTR(pid), n);
+}
+
+void name_unwatch_pid(Name *n, pid_t pid) {
+ assert(n);
+ assert(pid >= 1);
+
+ hashmap_remove(n->meta.manager->watch_pids, UINT32_TO_PTR(pid));
+}
+
+int name_watch_timer(Name *n, usec_t delay, int *id) {
+ struct epoll_event ev;
+ int fd;
+ struct itimerspec its;
+ int flags;
+ bool ours;
+
+ assert(n);
+ assert(id);
+
+ /* This will try to reuse the old timer if there is one */
+
+ if (*id >= 0) {
+ ours = false;
+ fd = *id;
+
+ } else {
+ ours = true;
+
+ if ((fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK|TFD_CLOEXEC)) < 0)
+ return -errno;
+ }
+
+ zero(its);
+
+ if (delay <= 0) {
+ /* Set absolute time in the past, but not 0, since we
+ * don't want to disarm the timer */
+ its.it_value.tv_sec = 0;
+ its.it_value.tv_nsec = 1;
+
+ flags = TFD_TIMER_ABSTIME;
+ } else {
+ timespec_store(&its.it_value, delay);
+ flags = 0;
+ }
+
+ /* This will also flush the elapse counter */
+ if (timerfd_settime(fd, flags, &its, NULL) < 0)
+ goto fail;
+
+ zero(ev);
+ ev.data.fd = fd;
+ ev.data.ptr = n;
+ ev.data.u32 = MANAGER_TIMER;
+ ev.events = POLLIN;
+
+ if (epoll_ctl(n->meta.manager->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0)
+ goto fail;
+
+ *id = fd;
+ return 0;
+
+fail:
+ if (ours)
+ assert_se(close_nointr(fd) == 0);
+
+ return -errno;
+}
+
+void name_unwatch_timer(Name *n, int *id) {
+ assert(n);
+ assert(id);
+
+ if (*id >= 0) {
+ assert_se(epoll_ctl(n->meta.manager->epoll_fd, EPOLL_CTL_DEL, *id, NULL) >= 0);
+ assert_se(close_nointr(*id) == 0);
+
+ *id = -1;
+ }
+}
+
+char *name_change_suffix(const char *t, const char *suffix) {
+ char *e, *n;
+ size_t a, b;
+
+ assert(t);
+ assert(name_is_valid(t));
+ assert(suffix);
+
+ assert_se(e = strrchr(t, '.'));
+ a = e - t;
+ b = strlen(suffix);
+
+ if (!(n = new(char, a + b + 1)))
+ return NULL;
+
+ memcpy(n, t, a);
+ memcpy(n+a, suffix, b+1);
+
+ return n;
+}
+
+bool name_job_is_applicable(Name *n, JobType j) {
+ assert(n);
+ assert(j >= 0 && j < _JOB_TYPE_MAX);
+
+ switch (j) {
+ case JOB_VERIFY_ACTIVE:
+ case JOB_START:
+ return true;
+
+ case JOB_STOP:
+ case JOB_RESTART:
+ case JOB_TRY_RESTART:
+ return name_can_start(n);
+
+ case JOB_RELOAD:
+ return name_can_reload(n);
+
+ case JOB_RELOAD_OR_START:
+ return name_can_reload(n) && name_can_start(n);
+
+ default:
+ assert_not_reached("Invalid job type");
+ }
+}
+
+int name_add_dependency(Name *n, NameDependency d, Name *other) {
+
+ static const NameDependency inverse_table[_NAME_DEPENDENCY_MAX] = {
+ [NAME_REQUIRES] = NAME_REQUIRED_BY,
+ [NAME_SOFT_REQUIRES] = NAME_SOFT_REQUIRED_BY,
+ [NAME_WANTS] = NAME_WANTED_BY,
+ [NAME_REQUISITE] = NAME_REQUIRED_BY,
+ [NAME_SOFT_REQUISITE] = NAME_SOFT_REQUIRED_BY,
+ [NAME_REQUIRED_BY] = _NAME_DEPENDENCY_INVALID,
+ [NAME_SOFT_REQUIRED_BY] = _NAME_DEPENDENCY_INVALID,
+ [NAME_WANTED_BY] = _NAME_DEPENDENCY_INVALID,
+ [NAME_CONFLICTS] = NAME_CONFLICTS,
+ [NAME_BEFORE] = NAME_AFTER,
+ [NAME_AFTER] = NAME_BEFORE
+ };
+ int r;
+
+ assert(n);
+ assert(d >= 0 && d < _NAME_DEPENDENCY_MAX);
+ assert(inverse_table[d] != _NAME_DEPENDENCY_INVALID);
+ assert(other);
+
+ if ((r = set_ensure_allocated(&n->meta.dependencies[d], trivial_hash_func, trivial_compare_func)) < 0)
+ return r;
+
+ if ((r = set_ensure_allocated(&other->meta.dependencies[inverse_table[d]], trivial_hash_func, trivial_compare_func)) < 0)
+ return r;
+
+ if ((r = set_put(n->meta.dependencies[d], other)) < 0)
+ return r;
+
+ if ((r = set_put(other->meta.dependencies[inverse_table[d]], n)) < 0) {
+ set_remove(n->meta.dependencies[d], other);
+ return r;
+ }
return 0;
}
~ianmdlvl / elogind.git / blobdiff