1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
25 #include <sys/epoll.h>
27 #include <sys/signalfd.h>
31 #include <sys/reboot.h>
32 #include <sys/ioctl.h>
36 #include <sys/types.h>
50 #include "ratelimit.h"
52 #include "mount-setup.h"
53 #include "unit-name.h"
54 #include "dbus-unit.h"
57 #include "path-lookup.h"
59 #include "bus-errors.h"
60 #include "exit-status.h"
61 #include "sd-daemon.h"
64 /* As soon as 16 units are in our GC queue, make sure to run a gc sweep */
65 #define GC_QUEUE_ENTRIES_MAX 16
67 /* As soon as 5s passed since a unit was added to our GC queue, make sure to run a gc sweep */
68 #define GC_QUEUE_USEC_MAX (10*USEC_PER_SEC)
70 /* Where clients shall send notification messages to */
71 #define NOTIFY_SOCKET_SYSTEM "/run/systemd/notify"
72 #define NOTIFY_SOCKET_USER "@/org/freedesktop/systemd1/notify"
74 static int manager_setup_notify(Manager
*m
) {
77 struct sockaddr_un un
;
79 struct epoll_event ev
;
85 m
->notify_watch
.type
= WATCH_NOTIFY
;
86 if ((m
->notify_watch
.fd
= socket(AF_UNIX
, SOCK_DGRAM
|SOCK_CLOEXEC
|SOCK_NONBLOCK
, 0)) < 0) {
87 log_error("Failed to allocate notification socket: %m");
92 sa
.sa
.sa_family
= AF_UNIX
;
95 snprintf(sa
.un
.sun_path
, sizeof(sa
.un
.sun_path
), NOTIFY_SOCKET_USER
"/%llu", random_ull());
97 unlink(NOTIFY_SOCKET_SYSTEM
);
98 strncpy(sa
.un
.sun_path
, NOTIFY_SOCKET_SYSTEM
, sizeof(sa
.un
.sun_path
));
101 if (sa
.un
.sun_path
[0] == '@')
102 sa
.un
.sun_path
[0] = 0;
105 r
= bind(m
->notify_watch
.fd
, &sa
.sa
, offsetof(struct sockaddr_un
, sun_path
) + 1 + strlen(sa
.un
.sun_path
+1));
109 log_error("bind() failed: %m");
113 if (setsockopt(m
->notify_watch
.fd
, SOL_SOCKET
, SO_PASSCRED
, &one
, sizeof(one
)) < 0) {
114 log_error("SO_PASSCRED failed: %m");
120 ev
.data
.ptr
= &m
->notify_watch
;
122 if (epoll_ctl(m
->epoll_fd
, EPOLL_CTL_ADD
, m
->notify_watch
.fd
, &ev
) < 0)
125 if (sa
.un
.sun_path
[0] == 0)
126 sa
.un
.sun_path
[0] = '@';
128 if (!(m
->notify_socket
= strdup(sa
.un
.sun_path
)))
131 log_debug("Using notification socket %s", m
->notify_socket
);
136 static int enable_special_signals(Manager
*m
) {
141 /* Enable that we get SIGINT on control-alt-del */
142 if (reboot(RB_DISABLE_CAD
) < 0)
143 log_warning("Failed to enable ctrl-alt-del handling: %m");
145 if ((fd
= open_terminal("/dev/tty0", O_RDWR
|O_NOCTTY
|O_CLOEXEC
)) < 0)
146 log_warning("Failed to open /dev/tty0: %m");
148 /* Enable that we get SIGWINCH on kbrequest */
149 if (ioctl(fd
, KDSIGACCEPT
, SIGWINCH
) < 0)
150 log_warning("Failed to enable kbrequest handling: %s", strerror(errno
));
152 close_nointr_nofail(fd
);
158 static int manager_setup_signals(Manager
*m
) {
160 struct epoll_event ev
;
165 /* We are not interested in SIGSTOP and friends. */
167 sa
.sa_handler
= SIG_DFL
;
168 sa
.sa_flags
= SA_NOCLDSTOP
|SA_RESTART
;
169 assert_se(sigaction(SIGCHLD
, &sa
, NULL
) == 0);
171 assert_se(sigemptyset(&mask
) == 0);
173 sigset_add_many(&mask
,
174 SIGCHLD
, /* Child died */
175 SIGTERM
, /* Reexecute daemon */
176 SIGHUP
, /* Reload configuration */
177 SIGUSR1
, /* systemd/upstart: reconnect to D-Bus */
178 SIGUSR2
, /* systemd: dump status */
179 SIGINT
, /* Kernel sends us this on control-alt-del */
180 SIGWINCH
, /* Kernel sends us this on kbrequest (alt-arrowup) */
181 SIGPWR
, /* Some kernel drivers and upsd send us this on power failure */
182 SIGRTMIN
+0, /* systemd: start default.target */
183 SIGRTMIN
+1, /* systemd: isolate rescue.target */
184 SIGRTMIN
+2, /* systemd: isolate emergency.target */
185 SIGRTMIN
+3, /* systemd: start halt.target */
186 SIGRTMIN
+4, /* systemd: start poweroff.target */
187 SIGRTMIN
+5, /* systemd: start reboot.target */
188 SIGRTMIN
+6, /* systemd: start kexec.target */
189 SIGRTMIN
+13, /* systemd: Immediate halt */
190 SIGRTMIN
+14, /* systemd: Immediate poweroff */
191 SIGRTMIN
+15, /* systemd: Immediate reboot */
192 SIGRTMIN
+16, /* systemd: Immediate kexec */
193 SIGRTMIN
+20, /* systemd: enable status messages */
194 SIGRTMIN
+21, /* systemd: disable status messages */
195 SIGRTMIN
+22, /* systemd: set log level to LOG_DEBUG */
196 SIGRTMIN
+23, /* systemd: set log level to LOG_INFO */
197 SIGRTMIN
+27, /* systemd: set log target to console */
198 SIGRTMIN
+28, /* systemd: set log target to kmsg */
199 SIGRTMIN
+29, /* systemd: set log target to syslog-or-kmsg */
201 assert_se(sigprocmask(SIG_SETMASK
, &mask
, NULL
) == 0);
203 m
->signal_watch
.type
= WATCH_SIGNAL
;
204 if ((m
->signal_watch
.fd
= signalfd(-1, &mask
, SFD_NONBLOCK
|SFD_CLOEXEC
)) < 0)
209 ev
.data
.ptr
= &m
->signal_watch
;
211 if (epoll_ctl(m
->epoll_fd
, EPOLL_CTL_ADD
, m
->signal_watch
.fd
, &ev
) < 0)
214 if (m
->running_as
== MANAGER_SYSTEM
)
215 return enable_special_signals(m
);
220 int manager_new(ManagerRunningAs running_as
, Manager
**_m
) {
225 assert(running_as
>= 0);
226 assert(running_as
< _MANAGER_RUNNING_AS_MAX
);
228 if (!(m
= new0(Manager
, 1)))
231 dual_timestamp_get(&m
->startup_timestamp
);
233 m
->running_as
= running_as
;
234 m
->name_data_slot
= m
->subscribed_data_slot
= -1;
235 m
->exit_code
= _MANAGER_EXIT_CODE_INVALID
;
236 m
->pin_cgroupfs_fd
= -1;
242 m
->signal_watch
.fd
= m
->mount_watch
.fd
= m
->udev_watch
.fd
= m
->epoll_fd
= m
->dev_autofs_fd
= m
->swap_watch
.fd
= -1;
243 m
->current_job_id
= 1; /* start as id #1, so that we can leave #0 around as "null-like" value */
245 if (!(m
->environment
= strv_copy(environ
)))
248 if (!(m
->default_controllers
= strv_new("cpu", NULL
)))
251 if (!(m
->units
= hashmap_new(string_hash_func
, string_compare_func
)))
254 if (!(m
->jobs
= hashmap_new(trivial_hash_func
, trivial_compare_func
)))
257 if (!(m
->transaction_jobs
= hashmap_new(trivial_hash_func
, trivial_compare_func
)))
260 if (!(m
->watch_pids
= hashmap_new(trivial_hash_func
, trivial_compare_func
)))
263 if (!(m
->cgroup_bondings
= hashmap_new(string_hash_func
, string_compare_func
)))
266 if (!(m
->watch_bus
= hashmap_new(string_hash_func
, string_compare_func
)))
269 if ((m
->epoll_fd
= epoll_create1(EPOLL_CLOEXEC
)) < 0)
272 if ((r
= lookup_paths_init(&m
->lookup_paths
, m
->running_as
, true)) < 0)
275 if ((r
= manager_setup_signals(m
)) < 0)
278 if ((r
= manager_setup_cgroup(m
)) < 0)
281 if ((r
= manager_setup_notify(m
)) < 0)
284 /* Try to connect to the busses, if possible. */
285 if ((r
= bus_init(m
, running_as
!= MANAGER_SYSTEM
)) < 0)
289 if ((m
->audit_fd
= audit_open()) < 0 &&
290 /* If the kernel lacks netlink or audit support,
291 * don't worry about it. */
292 errno
!= EAFNOSUPPORT
&& errno
!= EPROTONOSUPPORT
)
293 log_error("Failed to connect to audit log: %m");
296 m
->taint_usr
= dir_is_empty("/usr") > 0;
306 static unsigned manager_dispatch_cleanup_queue(Manager
*m
) {
312 while ((meta
= m
->cleanup_queue
)) {
313 assert(meta
->in_cleanup_queue
);
315 unit_free((Unit
*) meta
);
323 GC_OFFSET_IN_PATH
, /* This one is on the path we were traveling */
324 GC_OFFSET_UNSURE
, /* No clue */
325 GC_OFFSET_GOOD
, /* We still need this unit */
326 GC_OFFSET_BAD
, /* We don't need this unit anymore */
330 static void unit_gc_sweep(Unit
*u
, unsigned gc_marker
) {
337 if (u
->meta
.gc_marker
== gc_marker
+ GC_OFFSET_GOOD
||
338 u
->meta
.gc_marker
== gc_marker
+ GC_OFFSET_BAD
||
339 u
->meta
.gc_marker
== gc_marker
+ GC_OFFSET_IN_PATH
)
342 if (u
->meta
.in_cleanup_queue
)
345 if (unit_check_gc(u
))
348 u
->meta
.gc_marker
= gc_marker
+ GC_OFFSET_IN_PATH
;
352 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_REFERENCED_BY
], i
) {
353 unit_gc_sweep(other
, gc_marker
);
355 if (other
->meta
.gc_marker
== gc_marker
+ GC_OFFSET_GOOD
)
358 if (other
->meta
.gc_marker
!= gc_marker
+ GC_OFFSET_BAD
)
365 /* We were unable to find anything out about this entry, so
366 * let's investigate it later */
367 u
->meta
.gc_marker
= gc_marker
+ GC_OFFSET_UNSURE
;
368 unit_add_to_gc_queue(u
);
372 /* We definitely know that this one is not useful anymore, so
373 * let's mark it for deletion */
374 u
->meta
.gc_marker
= gc_marker
+ GC_OFFSET_BAD
;
375 unit_add_to_cleanup_queue(u
);
379 u
->meta
.gc_marker
= gc_marker
+ GC_OFFSET_GOOD
;
382 static unsigned manager_dispatch_gc_queue(Manager
*m
) {
389 if ((m
->n_in_gc_queue
< GC_QUEUE_ENTRIES_MAX
) &&
390 (m
->gc_queue_timestamp
<= 0 ||
391 (m
->gc_queue_timestamp
+ GC_QUEUE_USEC_MAX
) > now(CLOCK_MONOTONIC
)))
394 log_debug("Running GC...");
396 m
->gc_marker
+= _GC_OFFSET_MAX
;
397 if (m
->gc_marker
+ _GC_OFFSET_MAX
<= _GC_OFFSET_MAX
)
400 gc_marker
= m
->gc_marker
;
402 while ((meta
= m
->gc_queue
)) {
403 assert(meta
->in_gc_queue
);
405 unit_gc_sweep((Unit
*) meta
, gc_marker
);
407 LIST_REMOVE(Meta
, gc_queue
, m
->gc_queue
, meta
);
408 meta
->in_gc_queue
= false;
412 if (meta
->gc_marker
== gc_marker
+ GC_OFFSET_BAD
||
413 meta
->gc_marker
== gc_marker
+ GC_OFFSET_UNSURE
) {
414 log_debug("Collecting %s", meta
->id
);
415 meta
->gc_marker
= gc_marker
+ GC_OFFSET_BAD
;
416 unit_add_to_cleanup_queue((Unit
*) meta
);
420 m
->n_in_gc_queue
= 0;
421 m
->gc_queue_timestamp
= 0;
426 static void manager_clear_jobs_and_units(Manager
*m
) {
432 while ((j
= hashmap_first(m
->transaction_jobs
)))
435 while ((u
= hashmap_first(m
->units
)))
438 manager_dispatch_cleanup_queue(m
);
440 assert(!m
->load_queue
);
441 assert(!m
->run_queue
);
442 assert(!m
->dbus_unit_queue
);
443 assert(!m
->dbus_job_queue
);
444 assert(!m
->cleanup_queue
);
445 assert(!m
->gc_queue
);
447 assert(hashmap_isempty(m
->transaction_jobs
));
448 assert(hashmap_isempty(m
->jobs
));
449 assert(hashmap_isempty(m
->units
));
452 void manager_free(Manager
*m
) {
457 manager_clear_jobs_and_units(m
);
459 for (c
= 0; c
< _UNIT_TYPE_MAX
; c
++)
460 if (unit_vtable
[c
]->shutdown
)
461 unit_vtable
[c
]->shutdown(m
);
463 /* If we reexecute ourselves, we keep the root cgroup
465 manager_shutdown_cgroup(m
, m
->exit_code
!= MANAGER_REEXECUTE
);
467 manager_undo_generators(m
);
471 hashmap_free(m
->units
);
472 hashmap_free(m
->jobs
);
473 hashmap_free(m
->transaction_jobs
);
474 hashmap_free(m
->watch_pids
);
475 hashmap_free(m
->watch_bus
);
477 if (m
->epoll_fd
>= 0)
478 close_nointr_nofail(m
->epoll_fd
);
479 if (m
->signal_watch
.fd
>= 0)
480 close_nointr_nofail(m
->signal_watch
.fd
);
481 if (m
->notify_watch
.fd
>= 0)
482 close_nointr_nofail(m
->notify_watch
.fd
);
485 if (m
->audit_fd
>= 0)
486 audit_close(m
->audit_fd
);
489 free(m
->notify_socket
);
491 lookup_paths_free(&m
->lookup_paths
);
492 strv_free(m
->environment
);
494 strv_free(m
->default_controllers
);
496 hashmap_free(m
->cgroup_bondings
);
497 set_free_free(m
->unit_path_cache
);
502 int manager_enumerate(Manager
*m
) {
508 /* Let's ask every type to load all units from disk/kernel
509 * that it might know */
510 for (c
= 0; c
< _UNIT_TYPE_MAX
; c
++)
511 if (unit_vtable
[c
]->enumerate
)
512 if ((q
= unit_vtable
[c
]->enumerate(m
)) < 0)
515 manager_dispatch_load_queue(m
);
519 int manager_coldplug(Manager
*m
) {
527 /* Then, let's set up their initial state. */
528 HASHMAP_FOREACH_KEY(u
, k
, m
->units
, i
) {
534 if ((q
= unit_coldplug(u
)) < 0)
541 static void manager_build_unit_path_cache(Manager
*m
) {
548 set_free_free(m
->unit_path_cache
);
550 if (!(m
->unit_path_cache
= set_new(string_hash_func
, string_compare_func
))) {
551 log_error("Failed to allocate unit path cache.");
555 /* This simply builds a list of files we know exist, so that
556 * we don't always have to go to disk */
558 STRV_FOREACH(i
, m
->lookup_paths
.unit_path
) {
561 if (!(d
= opendir(*i
))) {
562 log_error("Failed to open directory: %m");
566 while ((de
= readdir(d
))) {
569 if (ignore_file(de
->d_name
))
572 p
= join(streq(*i
, "/") ? "" : *i
, "/", de
->d_name
, NULL
);
578 if ((r
= set_put(m
->unit_path_cache
, p
)) < 0) {
591 log_error("Failed to build unit path cache: %s", strerror(-r
));
593 set_free_free(m
->unit_path_cache
);
594 m
->unit_path_cache
= NULL
;
600 int manager_startup(Manager
*m
, FILE *serialization
, FDSet
*fds
) {
605 manager_run_generators(m
);
607 manager_build_unit_path_cache(m
);
609 /* If we will deserialize make sure that during enumeration
610 * this is already known, so we increase the counter here
615 /* First, enumerate what we can from all config files */
616 r
= manager_enumerate(m
);
618 /* Second, deserialize if there is something to deserialize */
620 if ((q
= manager_deserialize(m
, serialization
, fds
)) < 0)
623 /* Third, fire things up! */
624 if ((q
= manager_coldplug(m
)) < 0)
628 assert(m
->n_reloading
> 0);
635 static void transaction_delete_job(Manager
*m
, Job
*j
, bool delete_dependencies
) {
639 /* Deletes one job from the transaction */
641 manager_transaction_unlink_job(m
, j
, delete_dependencies
);
647 static void transaction_delete_unit(Manager
*m
, Unit
*u
) {
650 /* Deletes all jobs associated with a certain unit from the
653 while ((j
= hashmap_get(m
->transaction_jobs
, u
)))
654 transaction_delete_job(m
, j
, true);
657 static void transaction_clean_dependencies(Manager
*m
) {
663 /* Drops all dependencies of all installed jobs */
665 HASHMAP_FOREACH(j
, m
->jobs
, i
) {
666 while (j
->subject_list
)
667 job_dependency_free(j
->subject_list
);
668 while (j
->object_list
)
669 job_dependency_free(j
->object_list
);
672 assert(!m
->transaction_anchor
);
675 static void transaction_abort(Manager
*m
) {
680 while ((j
= hashmap_first(m
->transaction_jobs
)))
682 transaction_delete_job(m
, j
, true);
686 assert(hashmap_isempty(m
->transaction_jobs
));
688 transaction_clean_dependencies(m
);
691 static void transaction_find_jobs_that_matter_to_anchor(Manager
*m
, Job
*j
, unsigned generation
) {
696 /* A recursive sweep through the graph that marks all units
697 * that matter to the anchor job, i.e. are directly or
698 * indirectly a dependency of the anchor job via paths that
699 * are fully marked as mattering. */
704 l
= m
->transaction_anchor
;
706 LIST_FOREACH(subject
, l
, l
) {
708 /* This link does not matter */
712 /* This unit has already been marked */
713 if (l
->object
->generation
== generation
)
716 l
->object
->matters_to_anchor
= true;
717 l
->object
->generation
= generation
;
719 transaction_find_jobs_that_matter_to_anchor(m
, l
->object
, generation
);
723 static void transaction_merge_and_delete_job(Manager
*m
, Job
*j
, Job
*other
, JobType t
) {
724 JobDependency
*l
, *last
;
728 assert(j
->unit
== other
->unit
);
729 assert(!j
->installed
);
731 /* Merges 'other' into 'j' and then deletes j. */
734 j
->state
= JOB_WAITING
;
735 j
->override
= j
->override
|| other
->override
;
737 j
->matters_to_anchor
= j
->matters_to_anchor
|| other
->matters_to_anchor
;
739 /* Patch us in as new owner of the JobDependency objects */
741 LIST_FOREACH(subject
, l
, other
->subject_list
) {
742 assert(l
->subject
== other
);
747 /* Merge both lists */
749 last
->subject_next
= j
->subject_list
;
751 j
->subject_list
->subject_prev
= last
;
752 j
->subject_list
= other
->subject_list
;
755 /* Patch us in as new owner of the JobDependency objects */
757 LIST_FOREACH(object
, l
, other
->object_list
) {
758 assert(l
->object
== other
);
763 /* Merge both lists */
765 last
->object_next
= j
->object_list
;
767 j
->object_list
->object_prev
= last
;
768 j
->object_list
= other
->object_list
;
771 /* Kill the other job */
772 other
->subject_list
= NULL
;
773 other
->object_list
= NULL
;
774 transaction_delete_job(m
, other
, true);
776 static bool job_is_conflicted_by(Job
*j
) {
781 /* Returns true if this job is pulled in by a least one
782 * ConflictedBy dependency. */
784 LIST_FOREACH(object
, l
, j
->object_list
)
791 static int delete_one_unmergeable_job(Manager
*m
, Job
*j
) {
796 /* Tries to delete one item in the linked list
797 * j->transaction_next->transaction_next->... that conflicts
798 * with another one, in an attempt to make an inconsistent
799 * transaction work. */
801 /* We rely here on the fact that if a merged with b does not
802 * merge with c, either a or b merge with c neither */
803 LIST_FOREACH(transaction
, j
, j
)
804 LIST_FOREACH(transaction
, k
, j
->transaction_next
) {
807 /* Is this one mergeable? Then skip it */
808 if (job_type_is_mergeable(j
->type
, k
->type
))
811 /* Ok, we found two that conflict, let's see if we can
812 * drop one of them */
813 if (!j
->matters_to_anchor
&& !k
->matters_to_anchor
) {
815 /* Both jobs don't matter, so let's
816 * find the one that is smarter to
817 * remove. Let's think positive and
818 * rather remove stops then starts --
819 * except if something is being
820 * stopped because it is conflicted by
821 * another unit in which case we
822 * rather remove the start. */
824 log_debug("Looking at job %s/%s conflicted_by=%s", j
->unit
->meta
.id
, job_type_to_string(j
->type
), yes_no(j
->type
== JOB_STOP
&& job_is_conflicted_by(j
)));
825 log_debug("Looking at job %s/%s conflicted_by=%s", k
->unit
->meta
.id
, job_type_to_string(k
->type
), yes_no(k
->type
== JOB_STOP
&& job_is_conflicted_by(k
)));
827 if (j
->type
== JOB_STOP
) {
829 if (job_is_conflicted_by(j
))
834 } else if (k
->type
== JOB_STOP
) {
836 if (job_is_conflicted_by(k
))
843 } else if (!j
->matters_to_anchor
)
845 else if (!k
->matters_to_anchor
)
850 /* Ok, we can drop one, so let's do so. */
851 log_debug("Fixing conflicting jobs by deleting job %s/%s", d
->unit
->meta
.id
, job_type_to_string(d
->type
));
852 transaction_delete_job(m
, d
, true);
859 static int transaction_merge_jobs(Manager
*m
, DBusError
*e
) {
866 /* First step, check whether any of the jobs for one specific
867 * task conflict. If so, try to drop one of them. */
868 HASHMAP_FOREACH(j
, m
->transaction_jobs
, i
) {
873 LIST_FOREACH(transaction
, k
, j
->transaction_next
) {
874 if (job_type_merge(&t
, k
->type
) >= 0)
877 /* OK, we could not merge all jobs for this
878 * action. Let's see if we can get rid of one
881 if ((r
= delete_one_unmergeable_job(m
, j
)) >= 0)
882 /* Ok, we managed to drop one, now
883 * let's ask our callers to call us
884 * again after garbage collecting */
887 /* We couldn't merge anything. Failure */
888 dbus_set_error(e
, BUS_ERROR_TRANSACTION_JOBS_CONFLICTING
, "Transaction contains conflicting jobs '%s' and '%s' for %s. Probably contradicting requirement dependencies configured.",
889 job_type_to_string(t
), job_type_to_string(k
->type
), k
->unit
->meta
.id
);
894 /* Second step, merge the jobs. */
895 HASHMAP_FOREACH(j
, m
->transaction_jobs
, i
) {
899 /* Merge all transactions */
900 LIST_FOREACH(transaction
, k
, j
->transaction_next
)
901 assert_se(job_type_merge(&t
, k
->type
) == 0);
903 /* If an active job is mergeable, merge it too */
904 if (j
->unit
->meta
.job
)
905 job_type_merge(&t
, j
->unit
->meta
.job
->type
); /* Might fail. Which is OK */
907 while ((k
= j
->transaction_next
)) {
909 transaction_merge_and_delete_job(m
, k
, j
, t
);
912 transaction_merge_and_delete_job(m
, j
, k
, t
);
915 if (j
->unit
->meta
.job
&& !j
->installed
)
916 transaction_merge_and_delete_job(m
, j
, j
->unit
->meta
.job
, t
);
918 assert(!j
->transaction_next
);
919 assert(!j
->transaction_prev
);
925 static void transaction_drop_redundant(Manager
*m
) {
930 /* Goes through the transaction and removes all jobs that are
939 HASHMAP_FOREACH(j
, m
->transaction_jobs
, i
) {
940 bool changes_something
= false;
943 LIST_FOREACH(transaction
, k
, j
) {
945 if (!job_is_anchor(k
) &&
946 (k
->installed
|| job_type_is_redundant(k
->type
, unit_active_state(k
->unit
))) &&
947 (!k
->unit
->meta
.job
|| !job_type_is_conflicting(k
->type
, k
->unit
->meta
.job
->type
)))
950 changes_something
= true;
954 if (changes_something
)
957 /* log_debug("Found redundant job %s/%s, dropping.", j->unit->meta.id, job_type_to_string(j->type)); */
958 transaction_delete_job(m
, j
, false);
966 static bool unit_matters_to_anchor(Unit
*u
, Job
*j
) {
968 assert(!j
->transaction_prev
);
970 /* Checks whether at least one of the jobs for this unit
971 * matters to the anchor. */
973 LIST_FOREACH(transaction
, j
, j
)
974 if (j
->matters_to_anchor
)
980 static int transaction_verify_order_one(Manager
*m
, Job
*j
, Job
*from
, unsigned generation
, DBusError
*e
) {
987 assert(!j
->transaction_prev
);
989 /* Does a recursive sweep through the ordering graph, looking
990 * for a cycle. If we find cycle we try to break it. */
992 /* Have we seen this before? */
993 if (j
->generation
== generation
) {
996 /* If the marker is NULL we have been here already and
997 * decided the job was loop-free from here. Hence
998 * shortcut things and return right-away. */
1002 /* So, the marker is not NULL and we already have been
1003 * here. We have a cycle. Let's try to break it. We go
1004 * backwards in our path and try to find a suitable
1005 * job to remove. We use the marker to find our way
1006 * back, since smart how we are we stored our way back
1008 log_warning("Found ordering cycle on %s/%s", j
->unit
->meta
.id
, job_type_to_string(j
->type
));
1011 for (k
= from
; k
; k
= ((k
->generation
== generation
&& k
->marker
!= k
) ? k
->marker
: NULL
)) {
1013 log_info("Walked on cycle path to %s/%s", k
->unit
->meta
.id
, job_type_to_string(k
->type
));
1017 !unit_matters_to_anchor(k
->unit
, k
)) {
1018 /* Ok, we can drop this one, so let's
1023 /* Check if this in fact was the beginning of
1031 log_warning("Breaking ordering cycle by deleting job %s/%s", delete->unit
->meta
.id
, job_type_to_string(delete->type
));
1032 transaction_delete_unit(m
, delete->unit
);
1036 log_error("Unable to break cycle");
1038 dbus_set_error(e
, BUS_ERROR_TRANSACTION_ORDER_IS_CYCLIC
, "Transaction order is cyclic. See system logs for details.");
1042 /* Make the marker point to where we come from, so that we can
1043 * find our way backwards if we want to break a cycle. We use
1044 * a special marker for the beginning: we point to
1046 j
->marker
= from
? from
: j
;
1047 j
->generation
= generation
;
1049 /* We assume that the the dependencies are bidirectional, and
1050 * hence can ignore UNIT_AFTER */
1051 SET_FOREACH(u
, j
->unit
->meta
.dependencies
[UNIT_BEFORE
], i
) {
1054 /* Is there a job for this unit? */
1055 if (!(o
= hashmap_get(m
->transaction_jobs
, u
)))
1057 /* Ok, there is no job for this in the
1058 * transaction, but maybe there is already one
1060 if (!(o
= u
->meta
.job
))
1063 if ((r
= transaction_verify_order_one(m
, o
, j
, generation
, e
)) < 0)
1067 /* Ok, let's backtrack, and remember that this entry is not on
1068 * our path anymore. */
1074 static int transaction_verify_order(Manager
*m
, unsigned *generation
, DBusError
*e
) {
1083 /* Check if the ordering graph is cyclic. If it is, try to fix
1084 * that up by dropping one of the jobs. */
1086 g
= (*generation
)++;
1088 HASHMAP_FOREACH(j
, m
->transaction_jobs
, i
)
1089 if ((r
= transaction_verify_order_one(m
, j
, NULL
, g
, e
)) < 0)
1095 static void transaction_collect_garbage(Manager
*m
) {
1100 /* Drop jobs that are not required by any other job */
1108 HASHMAP_FOREACH(j
, m
->transaction_jobs
, i
) {
1109 if (j
->object_list
) {
1110 /* log_debug("Keeping job %s/%s because of %s/%s", */
1111 /* j->unit->meta.id, job_type_to_string(j->type), */
1112 /* j->object_list->subject ? j->object_list->subject->unit->meta.id : "root", */
1113 /* j->object_list->subject ? job_type_to_string(j->object_list->subject->type) : "root"); */
1117 /* log_debug("Garbage collecting job %s/%s", j->unit->meta.id, job_type_to_string(j->type)); */
1118 transaction_delete_job(m
, j
, true);
1126 static int transaction_is_destructive(Manager
*m
, DBusError
*e
) {
1132 /* Checks whether applying this transaction means that
1133 * existing jobs would be replaced */
1135 HASHMAP_FOREACH(j
, m
->transaction_jobs
, i
) {
1138 assert(!j
->transaction_prev
);
1139 assert(!j
->transaction_next
);
1141 if (j
->unit
->meta
.job
&&
1142 j
->unit
->meta
.job
!= j
&&
1143 !job_type_is_superset(j
->type
, j
->unit
->meta
.job
->type
)) {
1145 dbus_set_error(e
, BUS_ERROR_TRANSACTION_IS_DESTRUCTIVE
, "Transaction is destructive.");
1153 static void transaction_minimize_impact(Manager
*m
) {
1157 /* Drops all unnecessary jobs that reverse already active jobs
1158 * or that stop a running service. */
1166 HASHMAP_FOREACH(j
, m
->transaction_jobs
, i
) {
1167 LIST_FOREACH(transaction
, j
, j
) {
1168 bool stops_running_service
, changes_existing_job
;
1170 /* If it matters, we shouldn't drop it */
1171 if (j
->matters_to_anchor
)
1174 /* Would this stop a running service?
1175 * Would this change an existing job?
1176 * If so, let's drop this entry */
1178 stops_running_service
=
1179 j
->type
== JOB_STOP
&& UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(j
->unit
));
1181 changes_existing_job
=
1182 j
->unit
->meta
.job
&&
1183 job_type_is_conflicting(j
->type
, j
->unit
->meta
.job
->type
);
1185 if (!stops_running_service
&& !changes_existing_job
)
1188 if (stops_running_service
)
1189 log_debug("%s/%s would stop a running service.", j
->unit
->meta
.id
, job_type_to_string(j
->type
));
1191 if (changes_existing_job
)
1192 log_debug("%s/%s would change existing job.", j
->unit
->meta
.id
, job_type_to_string(j
->type
));
1194 /* Ok, let's get rid of this */
1195 log_debug("Deleting %s/%s to minimize impact.", j
->unit
->meta
.id
, job_type_to_string(j
->type
));
1197 transaction_delete_job(m
, j
, true);
1209 static int transaction_apply(Manager
*m
, JobMode mode
) {
1214 /* Moves the transaction jobs to the set of active jobs */
1216 if (mode
== JOB_ISOLATE
) {
1218 /* When isolating first kill all installed jobs which
1219 * aren't part of the new transaction */
1221 HASHMAP_FOREACH(j
, m
->jobs
, i
) {
1222 assert(j
->installed
);
1224 if (hashmap_get(m
->transaction_jobs
, j
->unit
))
1227 /* 'j' itself is safe to remove, but if other jobs
1228 are invalidated recursively, our iterator may become
1229 invalid and we need to start over. */
1230 if (job_finish_and_invalidate(j
, JOB_CANCELED
) > 0)
1235 HASHMAP_FOREACH(j
, m
->transaction_jobs
, i
) {
1237 assert(!j
->transaction_prev
);
1238 assert(!j
->transaction_next
);
1243 if ((r
= hashmap_put(m
->jobs
, UINT32_TO_PTR(j
->id
), j
)) < 0)
1247 while ((j
= hashmap_steal_first(m
->transaction_jobs
))) {
1249 /* log_debug("Skipping already installed job %s/%s as %u", j->unit->meta.id, job_type_to_string(j->type), (unsigned) j->id); */
1253 if (j
->unit
->meta
.job
)
1254 job_free(j
->unit
->meta
.job
);
1256 j
->unit
->meta
.job
= j
;
1257 j
->installed
= true;
1258 m
->n_installed_jobs
++;
1260 /* We're fully installed. Now let's free data we don't
1263 assert(!j
->transaction_next
);
1264 assert(!j
->transaction_prev
);
1266 job_add_to_run_queue(j
);
1267 job_add_to_dbus_queue(j
);
1270 log_debug("Installed new job %s/%s as %u", j
->unit
->meta
.id
, job_type_to_string(j
->type
), (unsigned) j
->id
);
1273 /* As last step, kill all remaining job dependencies. */
1274 transaction_clean_dependencies(m
);
1280 HASHMAP_FOREACH(j
, m
->transaction_jobs
, i
) {
1284 hashmap_remove(m
->jobs
, UINT32_TO_PTR(j
->id
));
1290 static int transaction_activate(Manager
*m
, JobMode mode
, DBusError
*e
) {
1292 unsigned generation
= 1;
1296 /* This applies the changes recorded in transaction_jobs to
1297 * the actual list of jobs, if possible. */
1299 /* First step: figure out which jobs matter */
1300 transaction_find_jobs_that_matter_to_anchor(m
, NULL
, generation
++);
1302 /* Second step: Try not to stop any running services if
1303 * we don't have to. Don't try to reverse running
1304 * jobs if we don't have to. */
1305 if (mode
== JOB_FAIL
)
1306 transaction_minimize_impact(m
);
1308 /* Third step: Drop redundant jobs */
1309 transaction_drop_redundant(m
);
1312 /* Fourth step: Let's remove unneeded jobs that might
1314 if (mode
!= JOB_ISOLATE
)
1315 transaction_collect_garbage(m
);
1317 /* Fifth step: verify order makes sense and correct
1318 * cycles if necessary and possible */
1319 if ((r
= transaction_verify_order(m
, &generation
, e
)) >= 0)
1323 log_warning("Requested transaction contains an unfixable cyclic ordering dependency: %s", bus_error(e
, r
));
1327 /* Let's see if the resulting transaction ordering
1328 * graph is still cyclic... */
1332 /* Sixth step: let's drop unmergeable entries if
1333 * necessary and possible, merge entries we can
1335 if ((r
= transaction_merge_jobs(m
, e
)) >= 0)
1339 log_warning("Requested transaction contains unmergeable jobs: %s", bus_error(e
, r
));
1343 /* Seventh step: an entry got dropped, let's garbage
1344 * collect its dependencies. */
1345 if (mode
!= JOB_ISOLATE
)
1346 transaction_collect_garbage(m
);
1348 /* Let's see if the resulting transaction still has
1349 * unmergeable entries ... */
1352 /* Eights step: Drop redundant jobs again, if the merging now allows us to drop more. */
1353 transaction_drop_redundant(m
);
1355 /* Ninth step: check whether we can actually apply this */
1356 if (mode
== JOB_FAIL
)
1357 if ((r
= transaction_is_destructive(m
, e
)) < 0) {
1358 log_notice("Requested transaction contradicts existing jobs: %s", bus_error(e
, r
));
1362 /* Tenth step: apply changes */
1363 if ((r
= transaction_apply(m
, mode
)) < 0) {
1364 log_warning("Failed to apply transaction: %s", strerror(-r
));
1368 assert(hashmap_isempty(m
->transaction_jobs
));
1369 assert(!m
->transaction_anchor
);
1374 transaction_abort(m
);
1378 static Job
* transaction_add_one_job(Manager
*m
, JobType type
, Unit
*unit
, bool override
, bool *is_new
) {
1384 /* Looks for an existing prospective job and returns that. If
1385 * it doesn't exist it is created and added to the prospective
1388 f
= hashmap_get(m
->transaction_jobs
, unit
);
1390 LIST_FOREACH(transaction
, j
, f
) {
1391 assert(j
->unit
== unit
);
1393 if (j
->type
== type
) {
1400 if (unit
->meta
.job
&& unit
->meta
.job
->type
== type
)
1402 else if (!(j
= job_new(m
, type
, unit
)))
1407 j
->matters_to_anchor
= false;
1408 j
->override
= override
;
1410 LIST_PREPEND(Job
, transaction
, f
, j
);
1412 if (hashmap_replace(m
->transaction_jobs
, unit
, f
) < 0) {
1420 /* log_debug("Added job %s/%s to transaction.", unit->meta.id, job_type_to_string(type)); */
1425 void manager_transaction_unlink_job(Manager
*m
, Job
*j
, bool delete_dependencies
) {
1429 if (j
->transaction_prev
)
1430 j
->transaction_prev
->transaction_next
= j
->transaction_next
;
1431 else if (j
->transaction_next
)
1432 hashmap_replace(m
->transaction_jobs
, j
->unit
, j
->transaction_next
);
1434 hashmap_remove_value(m
->transaction_jobs
, j
->unit
, j
);
1436 if (j
->transaction_next
)
1437 j
->transaction_next
->transaction_prev
= j
->transaction_prev
;
1439 j
->transaction_prev
= j
->transaction_next
= NULL
;
1441 while (j
->subject_list
)
1442 job_dependency_free(j
->subject_list
);
1444 while (j
->object_list
) {
1445 Job
*other
= j
->object_list
->matters
? j
->object_list
->subject
: NULL
;
1447 job_dependency_free(j
->object_list
);
1449 if (other
&& delete_dependencies
) {
1450 log_debug("Deleting job %s/%s as dependency of job %s/%s",
1451 other
->unit
->meta
.id
, job_type_to_string(other
->type
),
1452 j
->unit
->meta
.id
, job_type_to_string(j
->type
));
1453 transaction_delete_job(m
, other
, delete_dependencies
);
1458 static int transaction_add_job_and_dependencies(
1466 bool ignore_requirements
,
1477 assert(type
< _JOB_TYPE_MAX
);
1480 /* log_debug("Pulling in %s/%s from %s/%s", */
1481 /* unit->meta.id, job_type_to_string(type), */
1482 /* by ? by->unit->meta.id : "NA", */
1483 /* by ? job_type_to_string(by->type) : "NA"); */
1485 if (unit
->meta
.load_state
!= UNIT_LOADED
&&
1486 unit
->meta
.load_state
!= UNIT_ERROR
&&
1487 unit
->meta
.load_state
!= UNIT_MASKED
) {
1488 dbus_set_error(e
, BUS_ERROR_LOAD_FAILED
, "Unit %s is not loaded properly.", unit
->meta
.id
);
1492 if (type
!= JOB_STOP
&& unit
->meta
.load_state
== UNIT_ERROR
) {
1493 dbus_set_error(e
, BUS_ERROR_LOAD_FAILED
,
1494 "Unit %s failed to load: %s. "
1495 "See system logs and 'systemctl status %s' for details.",
1497 strerror(-unit
->meta
.load_error
),
1502 if (type
!= JOB_STOP
&& unit
->meta
.load_state
== UNIT_MASKED
) {
1503 dbus_set_error(e
, BUS_ERROR_MASKED
, "Unit %s is masked.", unit
->meta
.id
);
1507 if (!unit_job_is_applicable(unit
, type
)) {
1508 dbus_set_error(e
, BUS_ERROR_JOB_TYPE_NOT_APPLICABLE
, "Job type %s is not applicable for unit %s.", job_type_to_string(type
), unit
->meta
.id
);
1512 /* First add the job. */
1513 if (!(ret
= transaction_add_one_job(m
, type
, unit
, override
, &is_new
)))
1516 ret
->ignore_order
= ret
->ignore_order
|| ignore_order
;
1518 /* Then, add a link to the job. */
1519 if (!job_dependency_new(by
, ret
, matters
, conflicts
))
1522 if (is_new
&& !ignore_requirements
) {
1525 /* If we are following some other unit, make sure we
1526 * add all dependencies of everybody following. */
1527 if (unit_following_set(ret
->unit
, &following
) > 0) {
1528 SET_FOREACH(dep
, following
, i
)
1529 if ((r
= transaction_add_job_and_dependencies(m
, type
, dep
, ret
, false, override
, false, false, ignore_order
, e
, NULL
)) < 0) {
1530 log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep
->meta
.id
, bus_error(e
, r
));
1536 set_free(following
);
1539 /* Finally, recursively add in all dependencies. */
1540 if (type
== JOB_START
|| type
== JOB_RELOAD_OR_START
) {
1541 SET_FOREACH(dep
, ret
->unit
->meta
.dependencies
[UNIT_REQUIRES
], i
)
1542 if ((r
= transaction_add_job_and_dependencies(m
, JOB_START
, dep
, ret
, true, override
, false, false, ignore_order
, e
, NULL
)) < 0) {
1550 SET_FOREACH(dep
, ret
->unit
->meta
.dependencies
[UNIT_BIND_TO
], i
)
1551 if ((r
= transaction_add_job_and_dependencies(m
, JOB_START
, dep
, ret
, true, override
, false, false, ignore_order
, e
, NULL
)) < 0) {
1560 SET_FOREACH(dep
, ret
->unit
->meta
.dependencies
[UNIT_REQUIRES_OVERRIDABLE
], i
)
1561 if ((r
= transaction_add_job_and_dependencies(m
, JOB_START
, dep
, ret
, !override
, override
, false, false, ignore_order
, e
, NULL
)) < 0) {
1562 log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep
->meta
.id
, bus_error(e
, r
));
1568 SET_FOREACH(dep
, ret
->unit
->meta
.dependencies
[UNIT_WANTS
], i
)
1569 if ((r
= transaction_add_job_and_dependencies(m
, JOB_START
, dep
, ret
, false, false, false, false, ignore_order
, e
, NULL
)) < 0) {
1570 log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep
->meta
.id
, bus_error(e
, r
));
1576 SET_FOREACH(dep
, ret
->unit
->meta
.dependencies
[UNIT_REQUISITE
], i
)
1577 if ((r
= transaction_add_job_and_dependencies(m
, JOB_VERIFY_ACTIVE
, dep
, ret
, true, override
, false, false, ignore_order
, e
, NULL
)) < 0) {
1586 SET_FOREACH(dep
, ret
->unit
->meta
.dependencies
[UNIT_REQUISITE_OVERRIDABLE
], i
)
1587 if ((r
= transaction_add_job_and_dependencies(m
, JOB_VERIFY_ACTIVE
, dep
, ret
, !override
, override
, false, false, ignore_order
, e
, NULL
)) < 0) {
1588 log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep
->meta
.id
, bus_error(e
, r
));
1594 SET_FOREACH(dep
, ret
->unit
->meta
.dependencies
[UNIT_CONFLICTS
], i
)
1595 if ((r
= transaction_add_job_and_dependencies(m
, JOB_STOP
, dep
, ret
, true, override
, true, false, ignore_order
, e
, NULL
)) < 0) {
1604 SET_FOREACH(dep
, ret
->unit
->meta
.dependencies
[UNIT_CONFLICTED_BY
], i
)
1605 if ((r
= transaction_add_job_and_dependencies(m
, JOB_STOP
, dep
, ret
, false, override
, false, false, ignore_order
, e
, NULL
)) < 0) {
1606 log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep
->meta
.id
, bus_error(e
, r
));
1612 } else if (type
== JOB_STOP
|| type
== JOB_RESTART
|| type
== JOB_TRY_RESTART
) {
1614 SET_FOREACH(dep
, ret
->unit
->meta
.dependencies
[UNIT_REQUIRED_BY
], i
)
1615 if ((r
= transaction_add_job_and_dependencies(m
, type
, dep
, ret
, true, override
, false, false, ignore_order
, e
, NULL
)) < 0) {
1624 SET_FOREACH(dep
, ret
->unit
->meta
.dependencies
[UNIT_BOUND_BY
], i
)
1625 if ((r
= transaction_add_job_and_dependencies(m
, type
, dep
, ret
, true, override
, false, false, ignore_order
, e
, NULL
)) < 0) {
1635 /* JOB_VERIFY_STARTED, JOB_RELOAD require no dependency handling */
1647 static int transaction_add_isolate_jobs(Manager
*m
) {
1655 HASHMAP_FOREACH_KEY(u
, k
, m
->units
, i
) {
1657 /* ignore aliases */
1658 if (u
->meta
.id
!= k
)
1661 if (u
->meta
.ignore_on_isolate
)
1664 /* No need to stop inactive jobs */
1665 if (UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(u
)) && !u
->meta
.job
)
1668 /* Is there already something listed for this? */
1669 if (hashmap_get(m
->transaction_jobs
, u
))
1672 if ((r
= transaction_add_job_and_dependencies(m
, JOB_STOP
, u
, NULL
, true, false, false, false, false, NULL
, NULL
)) < 0)
1673 log_warning("Cannot add isolate job for unit %s, ignoring: %s", u
->meta
.id
, strerror(-r
));
1679 int manager_add_job(Manager
*m
, JobType type
, Unit
*unit
, JobMode mode
, bool override
, DBusError
*e
, Job
**_ret
) {
1684 assert(type
< _JOB_TYPE_MAX
);
1686 assert(mode
< _JOB_MODE_MAX
);
1688 if (mode
== JOB_ISOLATE
&& type
!= JOB_START
) {
1689 dbus_set_error(e
, BUS_ERROR_INVALID_JOB_MODE
, "Isolate is only valid for start.");
1693 if (mode
== JOB_ISOLATE
&& !unit
->meta
.allow_isolate
) {
1694 dbus_set_error(e
, BUS_ERROR_NO_ISOLATION
, "Operation refused, unit may not be isolated.");
1698 log_debug("Trying to enqueue job %s/%s/%s", unit
->meta
.id
, job_type_to_string(type
), job_mode_to_string(mode
));
1700 if ((r
= transaction_add_job_and_dependencies(m
, type
, unit
, NULL
, true, override
, false,
1701 mode
== JOB_IGNORE_DEPENDENCIES
|| mode
== JOB_IGNORE_REQUIREMENTS
,
1702 mode
== JOB_IGNORE_DEPENDENCIES
, e
, &ret
)) < 0) {
1703 transaction_abort(m
);
1707 if (mode
== JOB_ISOLATE
)
1708 if ((r
= transaction_add_isolate_jobs(m
)) < 0) {
1709 transaction_abort(m
);
1713 if ((r
= transaction_activate(m
, mode
, e
)) < 0)
1716 log_debug("Enqueued job %s/%s as %u", unit
->meta
.id
, job_type_to_string(type
), (unsigned) ret
->id
);
1724 int manager_add_job_by_name(Manager
*m
, JobType type
, const char *name
, JobMode mode
, bool override
, DBusError
*e
, Job
**_ret
) {
1729 assert(type
< _JOB_TYPE_MAX
);
1731 assert(mode
< _JOB_MODE_MAX
);
1733 if ((r
= manager_load_unit(m
, name
, NULL
, NULL
, &unit
)) < 0)
1736 return manager_add_job(m
, type
, unit
, mode
, override
, e
, _ret
);
1739 Job
*manager_get_job(Manager
*m
, uint32_t id
) {
1742 return hashmap_get(m
->jobs
, UINT32_TO_PTR(id
));
1745 Unit
*manager_get_unit(Manager
*m
, const char *name
) {
1749 return hashmap_get(m
->units
, name
);
1752 unsigned manager_dispatch_load_queue(Manager
*m
) {
1758 /* Make sure we are not run recursively */
1759 if (m
->dispatching_load_queue
)
1762 m
->dispatching_load_queue
= true;
1764 /* Dispatches the load queue. Takes a unit from the queue and
1765 * tries to load its data until the queue is empty */
1767 while ((meta
= m
->load_queue
)) {
1768 assert(meta
->in_load_queue
);
1770 unit_load((Unit
*) meta
);
1774 m
->dispatching_load_queue
= false;
1778 int manager_load_unit_prepare(Manager
*m
, const char *name
, const char *path
, DBusError
*e
, Unit
**_ret
) {
1783 assert(name
|| path
);
1785 /* This will prepare the unit for loading, but not actually
1786 * load anything from disk. */
1788 if (path
&& !is_path(path
)) {
1789 dbus_set_error(e
, BUS_ERROR_INVALID_PATH
, "Path %s is not absolute.", path
);
1794 name
= file_name_from_path(path
);
1796 if (!unit_name_is_valid(name
, false)) {
1797 dbus_set_error(e
, BUS_ERROR_INVALID_NAME
, "Unit name %s is not valid.", name
);
1801 if ((ret
= manager_get_unit(m
, name
))) {
1806 if (!(ret
= unit_new(m
)))
1810 if (!(ret
->meta
.fragment_path
= strdup(path
))) {
1815 if ((r
= unit_add_name(ret
, name
)) < 0) {
1820 unit_add_to_load_queue(ret
);
1821 unit_add_to_dbus_queue(ret
);
1822 unit_add_to_gc_queue(ret
);
1830 int manager_load_unit(Manager
*m
, const char *name
, const char *path
, DBusError
*e
, Unit
**_ret
) {
1835 /* This will load the service information files, but not actually
1836 * start any services or anything. */
1838 if ((r
= manager_load_unit_prepare(m
, name
, path
, e
, _ret
)) != 0)
1841 manager_dispatch_load_queue(m
);
1844 *_ret
= unit_follow_merge(*_ret
);
1849 void manager_dump_jobs(Manager
*s
, FILE *f
, const char *prefix
) {
1856 HASHMAP_FOREACH(j
, s
->jobs
, i
)
1857 job_dump(j
, f
, prefix
);
1860 void manager_dump_units(Manager
*s
, FILE *f
, const char *prefix
) {
1868 HASHMAP_FOREACH_KEY(u
, t
, s
->units
, i
)
1869 if (u
->meta
.id
== t
)
1870 unit_dump(u
, f
, prefix
);
1873 void manager_clear_jobs(Manager
*m
) {
1878 transaction_abort(m
);
1880 while ((j
= hashmap_first(m
->jobs
)))
1881 job_finish_and_invalidate(j
, JOB_CANCELED
);
1884 unsigned manager_dispatch_run_queue(Manager
*m
) {
1888 if (m
->dispatching_run_queue
)
1891 m
->dispatching_run_queue
= true;
1893 while ((j
= m
->run_queue
)) {
1894 assert(j
->installed
);
1895 assert(j
->in_run_queue
);
1897 job_run_and_invalidate(j
);
1901 m
->dispatching_run_queue
= false;
1905 unsigned manager_dispatch_dbus_queue(Manager
*m
) {
1912 if (m
->dispatching_dbus_queue
)
1915 m
->dispatching_dbus_queue
= true;
1917 while ((meta
= m
->dbus_unit_queue
)) {
1918 assert(meta
->in_dbus_queue
);
1920 bus_unit_send_change_signal((Unit
*) meta
);
1924 while ((j
= m
->dbus_job_queue
)) {
1925 assert(j
->in_dbus_queue
);
1927 bus_job_send_change_signal(j
);
1931 m
->dispatching_dbus_queue
= false;
1935 static int manager_process_notify_fd(Manager
*m
) {
1942 struct msghdr msghdr
;
1944 struct ucred
*ucred
;
1946 struct cmsghdr cmsghdr
;
1947 uint8_t buf
[CMSG_SPACE(sizeof(struct ucred
))];
1953 iovec
.iov_base
= buf
;
1954 iovec
.iov_len
= sizeof(buf
)-1;
1958 msghdr
.msg_iov
= &iovec
;
1959 msghdr
.msg_iovlen
= 1;
1960 msghdr
.msg_control
= &control
;
1961 msghdr
.msg_controllen
= sizeof(control
);
1963 if ((n
= recvmsg(m
->notify_watch
.fd
, &msghdr
, MSG_DONTWAIT
)) <= 0) {
1967 if (errno
== EAGAIN
|| errno
== EINTR
)
1973 if (msghdr
.msg_controllen
< CMSG_LEN(sizeof(struct ucred
)) ||
1974 control
.cmsghdr
.cmsg_level
!= SOL_SOCKET
||
1975 control
.cmsghdr
.cmsg_type
!= SCM_CREDENTIALS
||
1976 control
.cmsghdr
.cmsg_len
!= CMSG_LEN(sizeof(struct ucred
))) {
1977 log_warning("Received notify message without credentials. Ignoring.");
1981 ucred
= (struct ucred
*) CMSG_DATA(&control
.cmsghdr
);
1983 if (!(u
= hashmap_get(m
->watch_pids
, LONG_TO_PTR(ucred
->pid
))))
1984 if (!(u
= cgroup_unit_by_pid(m
, ucred
->pid
))) {
1985 log_warning("Cannot find unit for notify message of PID %lu.", (unsigned long) ucred
->pid
);
1989 assert((size_t) n
< sizeof(buf
));
1991 if (!(tags
= strv_split(buf
, "\n\r")))
1994 log_debug("Got notification message for unit %s", u
->meta
.id
);
1996 if (UNIT_VTABLE(u
)->notify_message
)
1997 UNIT_VTABLE(u
)->notify_message(u
, ucred
->pid
, tags
);
2005 static int manager_dispatch_sigchld(Manager
*m
) {
2015 /* First we call waitd() for a PID and do not reap the
2016 * zombie. That way we can still access /proc/$PID for
2017 * it while it is a zombie. */
2018 if (waitid(P_ALL
, 0, &si
, WEXITED
|WNOHANG
|WNOWAIT
) < 0) {
2020 if (errno
== ECHILD
)
2032 if (si
.si_code
== CLD_EXITED
|| si
.si_code
== CLD_KILLED
|| si
.si_code
== CLD_DUMPED
) {
2035 get_process_comm(si
.si_pid
, &name
);
2036 log_debug("Got SIGCHLD for process %lu (%s)", (unsigned long) si
.si_pid
, strna(name
));
2040 /* Let's flush any message the dying child might still
2041 * have queued for us. This ensures that the process
2042 * still exists in /proc so that we can figure out
2043 * which cgroup and hence unit it belongs to. */
2044 if ((r
= manager_process_notify_fd(m
)) < 0)
2047 /* And now figure out the unit this belongs to */
2048 if (!(u
= hashmap_get(m
->watch_pids
, LONG_TO_PTR(si
.si_pid
))))
2049 u
= cgroup_unit_by_pid(m
, si
.si_pid
);
2051 /* And now, we actually reap the zombie. */
2052 if (waitid(P_PID
, si
.si_pid
, &si
, WEXITED
) < 0) {
2059 if (si
.si_code
!= CLD_EXITED
&& si
.si_code
!= CLD_KILLED
&& si
.si_code
!= CLD_DUMPED
)
2062 log_debug("Child %lu died (code=%s, status=%i/%s)",
2063 (long unsigned) si
.si_pid
,
2064 sigchld_code_to_string(si
.si_code
),
2066 strna(si
.si_code
== CLD_EXITED
2067 ? exit_status_to_string(si
.si_status
, EXIT_STATUS_FULL
)
2068 : signal_to_string(si
.si_status
)));
2073 log_debug("Child %lu belongs to %s", (long unsigned) si
.si_pid
, u
->meta
.id
);
2075 hashmap_remove(m
->watch_pids
, LONG_TO_PTR(si
.si_pid
));
2076 UNIT_VTABLE(u
)->sigchld_event(u
, si
.si_pid
, si
.si_code
, si
.si_status
);
2082 static int manager_start_target(Manager
*m
, const char *name
, JobMode mode
) {
2086 dbus_error_init(&error
);
2088 log_debug("Activating special unit %s", name
);
2090 if ((r
= manager_add_job_by_name(m
, JOB_START
, name
, mode
, true, &error
, NULL
)) < 0)
2091 log_error("Failed to enqueue %s job: %s", name
, bus_error(&error
, r
));
2093 dbus_error_free(&error
);
2098 static int manager_process_signal_fd(Manager
*m
) {
2100 struct signalfd_siginfo sfsi
;
2101 bool sigchld
= false;
2106 if ((n
= read(m
->signal_watch
.fd
, &sfsi
, sizeof(sfsi
))) != sizeof(sfsi
)) {
2111 if (errno
== EINTR
|| errno
== EAGAIN
)
2117 if (sfsi
.ssi_pid
> 0) {
2120 get_process_comm(sfsi
.ssi_pid
, &p
);
2122 log_debug("Received SIG%s from PID %lu (%s).",
2123 signal_to_string(sfsi
.ssi_signo
),
2124 (unsigned long) sfsi
.ssi_pid
, strna(p
));
2127 log_debug("Received SIG%s.", signal_to_string(sfsi
.ssi_signo
));
2129 switch (sfsi
.ssi_signo
) {
2136 if (m
->running_as
== MANAGER_SYSTEM
) {
2137 /* This is for compatibility with the
2138 * original sysvinit */
2139 m
->exit_code
= MANAGER_REEXECUTE
;
2146 if (m
->running_as
== MANAGER_SYSTEM
) {
2147 manager_start_target(m
, SPECIAL_CTRL_ALT_DEL_TARGET
, JOB_REPLACE
);
2151 /* Run the exit target if there is one, if not, just exit. */
2152 if (manager_start_target(m
, SPECIAL_EXIT_TARGET
, JOB_REPLACE
) < 0) {
2153 m
->exit_code
= MANAGER_EXIT
;
2160 if (m
->running_as
== MANAGER_SYSTEM
)
2161 manager_start_target(m
, SPECIAL_KBREQUEST_TARGET
, JOB_REPLACE
);
2163 /* This is a nop on non-init */
2167 if (m
->running_as
== MANAGER_SYSTEM
)
2168 manager_start_target(m
, SPECIAL_SIGPWR_TARGET
, JOB_REPLACE
);
2170 /* This is a nop on non-init */
2176 u
= manager_get_unit(m
, SPECIAL_DBUS_SERVICE
);
2178 if (!u
|| UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u
))) {
2179 log_info("Trying to reconnect to bus...");
2183 if (!u
|| !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u
))) {
2184 log_info("Loading D-Bus service...");
2185 manager_start_target(m
, SPECIAL_DBUS_SERVICE
, JOB_REPLACE
);
2196 if (!(f
= open_memstream(&dump
, &size
))) {
2197 log_warning("Failed to allocate memory stream.");
2201 manager_dump_units(m
, f
, "\t");
2202 manager_dump_jobs(m
, f
, "\t");
2207 log_warning("Failed to write status stream");
2212 log_dump(LOG_INFO
, dump
);
2219 m
->exit_code
= MANAGER_RELOAD
;
2224 /* Starting SIGRTMIN+0 */
2225 static const char * const target_table
[] = {
2226 [0] = SPECIAL_DEFAULT_TARGET
,
2227 [1] = SPECIAL_RESCUE_TARGET
,
2228 [2] = SPECIAL_EMERGENCY_TARGET
,
2229 [3] = SPECIAL_HALT_TARGET
,
2230 [4] = SPECIAL_POWEROFF_TARGET
,
2231 [5] = SPECIAL_REBOOT_TARGET
,
2232 [6] = SPECIAL_KEXEC_TARGET
2235 /* Starting SIGRTMIN+13, so that target halt and system halt are 10 apart */
2236 static const ManagerExitCode code_table
[] = {
2238 [1] = MANAGER_POWEROFF
,
2239 [2] = MANAGER_REBOOT
,
2243 if ((int) sfsi
.ssi_signo
>= SIGRTMIN
+0 &&
2244 (int) sfsi
.ssi_signo
< SIGRTMIN
+(int) ELEMENTSOF(target_table
)) {
2245 int idx
= (int) sfsi
.ssi_signo
- SIGRTMIN
;
2246 manager_start_target(m
, target_table
[idx
],
2247 (idx
== 1 || idx
== 2) ? JOB_ISOLATE
: JOB_REPLACE
);
2251 if ((int) sfsi
.ssi_signo
>= SIGRTMIN
+13 &&
2252 (int) sfsi
.ssi_signo
< SIGRTMIN
+13+(int) ELEMENTSOF(code_table
)) {
2253 m
->exit_code
= code_table
[sfsi
.ssi_signo
- SIGRTMIN
- 13];
2257 switch (sfsi
.ssi_signo
- SIGRTMIN
) {
2260 log_debug("Enabling showing of status.");
2261 manager_set_show_status(m
, true);
2265 log_debug("Disabling showing of status.");
2266 manager_set_show_status(m
, false);
2270 log_set_max_level(LOG_DEBUG
);
2271 log_notice("Setting log level to debug.");
2275 log_set_max_level(LOG_INFO
);
2276 log_notice("Setting log level to info.");
2280 log_set_target(LOG_TARGET_CONSOLE
);
2281 log_notice("Setting log target to console.");
2285 log_set_target(LOG_TARGET_KMSG
);
2286 log_notice("Setting log target to kmsg.");
2290 log_set_target(LOG_TARGET_SYSLOG_OR_KMSG
);
2291 log_notice("Setting log target to syslog-or-kmsg.");
2295 log_warning("Got unhandled signal <%s>.", signal_to_string(sfsi
.ssi_signo
));
2302 return manager_dispatch_sigchld(m
);
2307 static int process_event(Manager
*m
, struct epoll_event
*ev
) {
2314 assert_se(w
= ev
->data
.ptr
);
2316 if (w
->type
== WATCH_INVALID
)
2323 /* An incoming signal? */
2324 if (ev
->events
!= EPOLLIN
)
2327 if ((r
= manager_process_signal_fd(m
)) < 0)
2334 /* An incoming daemon notification event? */
2335 if (ev
->events
!= EPOLLIN
)
2338 if ((r
= manager_process_notify_fd(m
)) < 0)
2345 /* Some fd event, to be dispatched to the units */
2346 UNIT_VTABLE(w
->data
.unit
)->fd_event(w
->data
.unit
, w
->fd
, ev
->events
, w
);
2349 case WATCH_UNIT_TIMER
:
2350 case WATCH_JOB_TIMER
: {
2354 /* Some timer event, to be dispatched to the units */
2355 if ((k
= read(w
->fd
, &v
, sizeof(v
))) != sizeof(v
)) {
2357 if (k
< 0 && (errno
== EINTR
|| errno
== EAGAIN
))
2360 return k
< 0 ? -errno
: -EIO
;
2363 if (w
->type
== WATCH_UNIT_TIMER
)
2364 UNIT_VTABLE(w
->data
.unit
)->timer_event(w
->data
.unit
, v
, w
);
2366 job_timer_event(w
->data
.job
, v
, w
);
2371 /* Some mount table change, intended for the mount subsystem */
2372 mount_fd_event(m
, ev
->events
);
2376 /* Some swap table change, intended for the swap subsystem */
2377 swap_fd_event(m
, ev
->events
);
2381 /* Some notification from udev, intended for the device subsystem */
2382 device_fd_event(m
, ev
->events
);
2385 case WATCH_DBUS_WATCH
:
2386 bus_watch_event(m
, w
, ev
->events
);
2389 case WATCH_DBUS_TIMEOUT
:
2390 bus_timeout_event(m
, w
, ev
->events
);
2394 log_error("event type=%i", w
->type
);
2395 assert_not_reached("Unknown epoll event type.");
2401 int manager_loop(Manager
*m
) {
2404 RATELIMIT_DEFINE(rl
, 1*USEC_PER_SEC
, 50000);
2407 m
->exit_code
= MANAGER_RUNNING
;
2409 /* Release the path cache */
2410 set_free_free(m
->unit_path_cache
);
2411 m
->unit_path_cache
= NULL
;
2413 manager_check_finished(m
);
2415 /* There might still be some zombies hanging around from
2416 * before we were exec()'ed. Leat's reap them */
2417 if ((r
= manager_dispatch_sigchld(m
)) < 0)
2420 while (m
->exit_code
== MANAGER_RUNNING
) {
2421 struct epoll_event event
;
2424 if (!ratelimit_test(&rl
)) {
2425 /* Yay, something is going seriously wrong, pause a little */
2426 log_warning("Looping too fast. Throttling execution a little.");
2430 if (manager_dispatch_load_queue(m
) > 0)
2433 if (manager_dispatch_run_queue(m
) > 0)
2436 if (bus_dispatch(m
) > 0)
2439 if (manager_dispatch_cleanup_queue(m
) > 0)
2442 if (manager_dispatch_gc_queue(m
) > 0)
2445 if (manager_dispatch_dbus_queue(m
) > 0)
2448 if (swap_dispatch_reload(m
) > 0)
2451 if ((n
= epoll_wait(m
->epoll_fd
, &event
, 1, -1)) < 0) {
2461 if ((r
= process_event(m
, &event
)) < 0)
2465 return m
->exit_code
;
2468 int manager_get_unit_from_dbus_path(Manager
*m
, const char *s
, Unit
**_u
) {
2476 if (!startswith(s
, "/org/freedesktop/systemd1/unit/"))
2479 if (!(n
= bus_path_unescape(s
+31)))
2482 u
= manager_get_unit(m
, n
);
2493 int manager_get_job_from_dbus_path(Manager
*m
, const char *s
, Job
**_j
) {
2502 if (!startswith(s
, "/org/freedesktop/systemd1/job/"))
2505 if ((r
= safe_atou(s
+ 30, &id
)) < 0)
2508 if (!(j
= manager_get_job(m
, id
)))
2516 void manager_send_unit_audit(Manager
*m
, Unit
*u
, int type
, bool success
) {
2521 if (m
->audit_fd
< 0)
2524 /* Don't generate audit events if the service was already
2525 * started and we're just deserializing */
2526 if (m
->n_reloading
> 0)
2529 if (m
->running_as
!= MANAGER_SYSTEM
)
2532 if (u
->meta
.type
!= UNIT_SERVICE
)
2535 if (!(p
= unit_name_to_prefix_and_instance(u
->meta
.id
))) {
2536 log_error("Failed to allocate unit name for audit message: %s", strerror(ENOMEM
));
2540 if (audit_log_user_comm_message(m
->audit_fd
, type
, "", p
, NULL
, NULL
, NULL
, success
) < 0) {
2541 log_warning("Failed to send audit message: %m");
2543 if (errno
== EPERM
) {
2544 /* We aren't allowed to send audit messages?
2545 * Then let's not retry again, to avoid
2546 * spamming the user with the same and same
2547 * messages over and over. */
2549 audit_close(m
->audit_fd
);
2559 void manager_send_unit_plymouth(Manager
*m
, Unit
*u
) {
2561 union sockaddr_union sa
;
2563 char *message
= NULL
;
2565 /* Don't generate plymouth events if the service was already
2566 * started and we're just deserializing */
2567 if (m
->n_reloading
> 0)
2570 if (m
->running_as
!= MANAGER_SYSTEM
)
2573 if (u
->meta
.type
!= UNIT_SERVICE
&&
2574 u
->meta
.type
!= UNIT_MOUNT
&&
2575 u
->meta
.type
!= UNIT_SWAP
)
2578 /* We set SOCK_NONBLOCK here so that we rather drop the
2579 * message then wait for plymouth */
2580 if ((fd
= socket(AF_UNIX
, SOCK_STREAM
|SOCK_CLOEXEC
|SOCK_NONBLOCK
, 0)) < 0) {
2581 log_error("socket() failed: %m");
2586 sa
.sa
.sa_family
= AF_UNIX
;
2587 strncpy(sa
.un
.sun_path
+1, "/org/freedesktop/plymouthd", sizeof(sa
.un
.sun_path
)-1);
2588 if (connect(fd
, &sa
.sa
, offsetof(struct sockaddr_un
, sun_path
) + 1 + strlen(sa
.un
.sun_path
+1)) < 0) {
2590 if (errno
!= EPIPE
&&
2593 errno
!= ECONNREFUSED
&&
2594 errno
!= ECONNRESET
&&
2595 errno
!= ECONNABORTED
)
2596 log_error("connect() failed: %m");
2601 if (asprintf(&message
, "U\002%c%s%n", (int) (strlen(u
->meta
.id
) + 1), u
->meta
.id
, &n
) < 0) {
2602 log_error("Out of memory");
2607 if (write(fd
, message
, n
+ 1) != n
+ 1) {
2609 if (errno
!= EPIPE
&&
2612 errno
!= ECONNREFUSED
&&
2613 errno
!= ECONNRESET
&&
2614 errno
!= ECONNABORTED
)
2615 log_error("Failed to write Plymouth message: %m");
2622 close_nointr_nofail(fd
);
2627 void manager_dispatch_bus_name_owner_changed(
2630 const char* old_owner
,
2631 const char *new_owner
) {
2638 if (!(u
= hashmap_get(m
->watch_bus
, name
)))
2641 UNIT_VTABLE(u
)->bus_name_owner_change(u
, name
, old_owner
, new_owner
);
2644 void manager_dispatch_bus_query_pid_done(
2655 if (!(u
= hashmap_get(m
->watch_bus
, name
)))
2658 UNIT_VTABLE(u
)->bus_query_pid_done(u
, name
, pid
);
2661 int manager_open_serialization(Manager
*m
, FILE **_f
) {
2669 if (m
->running_as
== MANAGER_SYSTEM
)
2670 asprintf(&path
, "/run/systemd/dump-%lu-XXXXXX", (unsigned long) getpid());
2672 asprintf(&path
, "/tmp/systemd-dump-%lu-XXXXXX", (unsigned long) getpid());
2677 saved_umask
= umask(0077);
2678 fd
= mkostemp(path
, O_RDWR
|O_CLOEXEC
);
2688 log_debug("Serializing state to %s", path
);
2691 if (!(f
= fdopen(fd
, "w+")))
2699 int manager_serialize(Manager
*m
, FILE *f
, FDSet
*fds
) {
2711 fprintf(f
, "current-job-id=%i\n", m
->current_job_id
);
2712 fprintf(f
, "taint-usr=%s\n", yes_no(m
->taint_usr
));
2714 dual_timestamp_serialize(f
, "initrd-timestamp", &m
->initrd_timestamp
);
2715 dual_timestamp_serialize(f
, "startup-timestamp", &m
->startup_timestamp
);
2716 dual_timestamp_serialize(f
, "finish-timestamp", &m
->finish_timestamp
);
2720 HASHMAP_FOREACH_KEY(u
, t
, m
->units
, i
) {
2721 if (u
->meta
.id
!= t
)
2724 if (!unit_can_serialize(u
))
2728 fputs(u
->meta
.id
, f
);
2731 if ((r
= unit_serialize(u
, f
, fds
)) < 0) {
2737 assert(m
->n_reloading
> 0);
2743 r
= bus_fdset_add_all(m
, fds
);
2750 int manager_deserialize(Manager
*m
, FILE *f
, FDSet
*fds
) {
2756 log_debug("Deserializing state...");
2761 char line
[LINE_MAX
], *l
;
2763 if (!fgets(line
, sizeof(line
), f
)) {
2778 if (startswith(l
, "current-job-id=")) {
2781 if (safe_atou32(l
+15, &id
) < 0)
2782 log_debug("Failed to parse current job id value %s", l
+15);
2784 m
->current_job_id
= MAX(m
->current_job_id
, id
);
2785 } else if (startswith(l
, "taint-usr=")) {
2788 if ((b
= parse_boolean(l
+10)) < 0)
2789 log_debug("Failed to parse taint /usr flag %s", l
+10);
2791 m
->taint_usr
= m
->taint_usr
|| b
;
2792 } else if (startswith(l
, "initrd-timestamp="))
2793 dual_timestamp_deserialize(l
+17, &m
->initrd_timestamp
);
2794 else if (startswith(l
, "startup-timestamp="))
2795 dual_timestamp_deserialize(l
+18, &m
->startup_timestamp
);
2796 else if (startswith(l
, "finish-timestamp="))
2797 dual_timestamp_deserialize(l
+17, &m
->finish_timestamp
);
2799 log_debug("Unknown serialization item '%s'", l
);
2804 char name
[UNIT_NAME_MAX
+2];
2807 if (!fgets(name
, sizeof(name
), f
)) {
2818 if ((r
= manager_load_unit(m
, strstrip(name
), NULL
, NULL
, &u
)) < 0)
2821 if ((r
= unit_deserialize(u
, f
, fds
)) < 0)
2831 assert(m
->n_reloading
> 0);
2837 int manager_reload(Manager
*m
) {
2844 if ((r
= manager_open_serialization(m
, &f
)) < 0)
2849 if (!(fds
= fdset_new())) {
2855 if ((r
= manager_serialize(m
, f
, fds
)) < 0) {
2860 if (fseeko(f
, 0, SEEK_SET
) < 0) {
2866 /* From here on there is no way back. */
2867 manager_clear_jobs_and_units(m
);
2868 manager_undo_generators(m
);
2870 /* Find new unit paths */
2871 lookup_paths_free(&m
->lookup_paths
);
2872 if ((q
= lookup_paths_init(&m
->lookup_paths
, m
->running_as
, true)) < 0)
2875 manager_run_generators(m
);
2877 manager_build_unit_path_cache(m
);
2879 /* First, enumerate what we can from all config files */
2880 if ((q
= manager_enumerate(m
)) < 0)
2883 /* Second, deserialize our stored data */
2884 if ((q
= manager_deserialize(m
, f
, fds
)) < 0)
2890 /* Third, fire things up! */
2891 if ((q
= manager_coldplug(m
)) < 0)
2894 assert(m
->n_reloading
> 0);
2907 bool manager_is_booting_or_shutting_down(Manager
*m
) {
2912 /* Is the initial job still around? */
2913 if (manager_get_job(m
, 1))
2916 /* Is there a job for the shutdown target? */
2917 u
= manager_get_unit(m
, SPECIAL_SHUTDOWN_TARGET
);
2919 return !!u
->meta
.job
;
2924 void manager_reset_failed(Manager
*m
) {
2930 HASHMAP_FOREACH(u
, m
->units
, i
)
2931 unit_reset_failed(u
);
2934 bool manager_unit_pending_inactive(Manager
*m
, const char *name
) {
2940 /* Returns true if the unit is inactive or going down */
2941 if (!(u
= manager_get_unit(m
, name
)))
2944 return unit_pending_inactive(u
);
2947 void manager_check_finished(Manager
*m
) {
2948 char userspace
[FORMAT_TIMESPAN_MAX
], initrd
[FORMAT_TIMESPAN_MAX
], kernel
[FORMAT_TIMESPAN_MAX
], sum
[FORMAT_TIMESPAN_MAX
];
2949 usec_t kernel_usec
= 0, initrd_usec
= 0, userspace_usec
= 0, total_usec
= 0;
2953 if (dual_timestamp_is_set(&m
->finish_timestamp
))
2956 if (hashmap_size(m
->jobs
) > 0)
2959 dual_timestamp_get(&m
->finish_timestamp
);
2961 if (m
->running_as
== MANAGER_SYSTEM
&& detect_container(NULL
) <= 0) {
2963 userspace_usec
= m
->finish_timestamp
.monotonic
- m
->startup_timestamp
.monotonic
;
2964 total_usec
= m
->finish_timestamp
.monotonic
;
2966 if (dual_timestamp_is_set(&m
->initrd_timestamp
)) {
2968 kernel_usec
= m
->initrd_timestamp
.monotonic
;
2969 initrd_usec
= m
->startup_timestamp
.monotonic
- m
->initrd_timestamp
.monotonic
;
2971 log_info("Startup finished in %s (kernel) + %s (initrd) + %s (userspace) = %s.",
2972 format_timespan(kernel
, sizeof(kernel
), kernel_usec
),
2973 format_timespan(initrd
, sizeof(initrd
), initrd_usec
),
2974 format_timespan(userspace
, sizeof(userspace
), userspace_usec
),
2975 format_timespan(sum
, sizeof(sum
), total_usec
));
2977 kernel_usec
= m
->startup_timestamp
.monotonic
;
2980 log_info("Startup finished in %s (kernel) + %s (userspace) = %s.",
2981 format_timespan(kernel
, sizeof(kernel
), kernel_usec
),
2982 format_timespan(userspace
, sizeof(userspace
), userspace_usec
),
2983 format_timespan(sum
, sizeof(sum
), total_usec
));
2986 userspace_usec
= initrd_usec
= kernel_usec
= 0;
2987 total_usec
= m
->finish_timestamp
.monotonic
- m
->startup_timestamp
.monotonic
;
2989 log_debug("Startup finished in %s.",
2990 format_timespan(sum
, sizeof(sum
), total_usec
));
2993 bus_broadcast_finished(m
, kernel_usec
, initrd_usec
, userspace_usec
, total_usec
);
2996 "READY=1\nSTATUS=Startup finished in %s.",
2997 format_timespan(sum
, sizeof(sum
), total_usec
));
3000 void manager_run_generators(Manager
*m
) {
3002 const char *generator_path
;
3003 const char *argv
[3];
3008 generator_path
= m
->running_as
== MANAGER_SYSTEM
? SYSTEM_GENERATOR_PATH
: USER_GENERATOR_PATH
;
3009 if (!(d
= opendir(generator_path
))) {
3011 if (errno
== ENOENT
)
3014 log_error("Failed to enumerate generator directory: %m");
3018 if (!m
->generator_unit_path
) {
3020 char user_path
[] = "/tmp/systemd-generator-XXXXXX";
3022 if (m
->running_as
== MANAGER_SYSTEM
&& getpid() == 1) {
3023 p
= "/run/systemd/generator";
3025 if (mkdir_p(p
, 0755) < 0) {
3026 log_error("Failed to create generator directory: %m");
3031 if (!(p
= mkdtemp(user_path
))) {
3032 log_error("Failed to create generator directory: %m");
3037 if (!(m
->generator_unit_path
= strdup(p
))) {
3038 log_error("Failed to allocate generator unit path.");
3043 argv
[0] = NULL
; /* Leave this empty, execute_directory() will fill something in */
3044 argv
[1] = m
->generator_unit_path
;
3048 execute_directory(generator_path
, d
, (char**) argv
);
3051 if (rmdir(m
->generator_unit_path
) >= 0) {
3052 /* Uh? we were able to remove this dir? I guess that
3053 * means the directory was empty, hence let's shortcut
3056 free(m
->generator_unit_path
);
3057 m
->generator_unit_path
= NULL
;
3061 if (!strv_find(m
->lookup_paths
.unit_path
, m
->generator_unit_path
)) {
3064 if (!(l
= strv_append(m
->lookup_paths
.unit_path
, m
->generator_unit_path
))) {
3065 log_error("Failed to add generator directory to unit search path: %m");
3069 strv_free(m
->lookup_paths
.unit_path
);
3070 m
->lookup_paths
.unit_path
= l
;
3072 log_debug("Added generator unit path %s to search path.", m
->generator_unit_path
);
3080 void manager_undo_generators(Manager
*m
) {
3083 if (!m
->generator_unit_path
)
3086 strv_remove(m
->lookup_paths
.unit_path
, m
->generator_unit_path
);
3087 rm_rf(m
->generator_unit_path
, false, true, false);
3089 free(m
->generator_unit_path
);
3090 m
->generator_unit_path
= NULL
;
3093 int manager_set_default_controllers(Manager
*m
, char **controllers
) {
3098 if (!(l
= strv_copy(controllers
)))
3101 strv_free(m
->default_controllers
);
3102 m
->default_controllers
= l
;
3107 void manager_recheck_syslog(Manager
*m
) {
3112 if (m
->running_as
!= MANAGER_SYSTEM
)
3115 if ((u
= manager_get_unit(m
, SPECIAL_SYSLOG_SOCKET
))) {
3118 state
= SOCKET(u
)->state
;
3120 if (state
!= SOCKET_DEAD
&&
3121 state
!= SOCKET_FAILED
&&
3122 state
!= SOCKET_RUNNING
) {
3124 /* Hmm, the socket is not set up, or is still
3125 * listening, let's better not try to use
3126 * it. Note that we have no problem if the
3127 * socket is completely down, since there
3128 * might be a foreign /dev/log socket around
3129 * and we want to make use of that.
3137 if ((u
= manager_get_unit(m
, SPECIAL_SYSLOG_TARGET
)))
3138 if (TARGET(u
)->state
!= TARGET_ACTIVE
) {
3143 /* Hmm, OK, so the socket is either fully up, or fully down,
3144 * and the target is up, then let's make use of the socket */
3148 void manager_set_show_status(Manager
*m
, bool b
) {
3151 if (m
->running_as
!= MANAGER_SYSTEM
)
3157 touch("/run/systemd/show-status");
3159 unlink("/run/systemd/show-status");
3162 bool manager_get_show_status(Manager
*m
) {
3165 if (m
->running_as
!= MANAGER_SYSTEM
)
3171 /* If Plymouth is running make sure we show the status, so
3172 * that there's something nice to see when people press Esc */
3174 return plymouth_running();
3177 static const char* const manager_running_as_table
[_MANAGER_RUNNING_AS_MAX
] = {
3178 [MANAGER_SYSTEM
] = "system",
3179 [MANAGER_USER
] = "user"
3182 DEFINE_STRING_TABLE_LOOKUP(manager_running_as
, ManagerRunningAs
);