-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
/***
This file is part of systemd.
***/
#include <errno.h>
-#include <unistd.h>
#include <sys/epoll.h>
#include <sys/stat.h>
-#include <libudev.h>
+#include <unistd.h>
-#include "unit.h"
-#include "swap.h"
-#include "unit-name.h"
+#include "libudev.h"
+
+#include "alloc-util.h"
#include "dbus-swap.h"
-#include "special.h"
+#include "escape.h"
#include "exit-status.h"
+#include "fd-util.h"
+#include "formats-util.h"
+#include "fstab-util.h"
+#include "parse-util.h"
#include "path-util.h"
-#include "virt.h"
+#include "process-util.h"
+#include "special.h"
+#include "string-table.h"
+#include "string-util.h"
+#include "swap.h"
#include "udev-util.h"
-#include "fstab-util.h"
-#include "formats-util.h"
+#include "unit-name.h"
+#include "unit.h"
+#include "virt.h"
static const UnitActiveState state_translation_table[_SWAP_STATE_MAX] = {
[SWAP_DEAD] = UNIT_INACTIVE,
if (!s->from_proc_swaps)
return;
- free(s->parameters_proc_swaps.what);
- s->parameters_proc_swaps.what = NULL;
+ s->parameters_proc_swaps.what = mfree(s->parameters_proc_swaps.what);
s->from_proc_swaps = false;
}
else
hashmap_remove(swaps, s->devnode);
- free(s->devnode);
- s->devnode = NULL;
+ s->devnode = mfree(s->devnode);
}
if (devnode) {
swap_unset_proc_swaps(s);
swap_set_devnode(s, NULL);
- free(s->what);
- s->what = NULL;
-
- free(s->parameters_fragment.what);
- s->parameters_fragment.what = NULL;
-
- free(s->parameters_fragment.options);
- s->parameters_fragment.options = NULL;
+ s->what = mfree(s->what);
+ s->parameters_fragment.what = mfree(s->parameters_fragment.what);
+ s->parameters_fragment.options = mfree(s->parameters_fragment.options);
s->exec_runtime = exec_runtime_unref(s->exec_runtime);
exec_command_done_array(s->exec_command, _SWAP_EXEC_COMMAND_MAX);
s->control_command = NULL;
+ dynamic_creds_unref(&s->dynamic_creds);
+
swap_unwatch_control_pid(s);
s->timer_event_source = sd_event_source_unref(s->timer_event_source);
}
-static int swap_arm_timer(Swap *s) {
+static int swap_arm_timer(Swap *s, usec_t usec) {
int r;
assert(s);
- if (s->timeout_usec <= 0) {
- s->timer_event_source = sd_event_source_unref(s->timer_event_source);
- return 0;
- }
-
if (s->timer_event_source) {
- r = sd_event_source_set_time(s->timer_event_source, now(CLOCK_MONOTONIC) + s->timeout_usec);
+ r = sd_event_source_set_time(s->timer_event_source, usec);
if (r < 0)
return r;
return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT);
}
+ if (usec == USEC_INFINITY)
+ return 0;
+
r = sd_event_add_time(
UNIT(s)->manager->event,
&s->timer_event_source,
CLOCK_MONOTONIC,
- now(CLOCK_MONOTONIC) + s->timeout_usec, 0,
+ usec, 0,
swap_dispatch_timer, s);
if (r < 0)
return r;
return 0;
if (is_device_path(s->what))
- return unit_add_node_link(UNIT(s), s->what, UNIT(s)->manager->running_as == MANAGER_SYSTEM);
+ return unit_add_node_link(UNIT(s), s->what, MANAGER_IS_SYSTEM(UNIT(s)->manager), UNIT_BINDS_TO);
else
/* File based swap devices need to be ordered after
* systemd-remount-fs.service, since they might need a
}
static int swap_add_default_dependencies(Swap *s) {
+ int r;
+
assert(s);
- if (UNIT(s)->manager->running_as != MANAGER_SYSTEM)
+ if (!UNIT(s)->default_dependencies)
return 0;
- if (detect_container(NULL) > 0)
+ if (!MANAGER_IS_SYSTEM(UNIT(s)->manager))
return 0;
+ if (detect_container() > 0)
+ return 0;
+
+ /* swap units generated for the swap dev links are missing the
+ * ordering dep against the swap target. */
+ r = unit_add_dependency_by_name(UNIT(s), UNIT_BEFORE, SPECIAL_SWAP_TARGET, NULL, true);
+ if (r < 0)
+ return r;
+
return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true);
}
if (r < 0)
return r;
- r = unit_add_default_slice(u, &s->cgroup_context);
+ r = unit_set_default_slice(u);
if (r < 0)
return r;
- if (UNIT(s)->default_dependencies) {
- r = swap_add_default_dependencies(s);
- if (r < 0)
- return r;
- }
+ r = swap_add_default_dependencies(s);
+ if (r < 0)
+ return r;
}
return swap_verify(s);
if (new_state == s->state)
return 0;
- if (new_state == SWAP_ACTIVATING ||
- new_state == SWAP_ACTIVATING_SIGTERM ||
- new_state == SWAP_ACTIVATING_SIGKILL ||
- new_state == SWAP_ACTIVATING_DONE ||
- new_state == SWAP_DEACTIVATING ||
- new_state == SWAP_DEACTIVATING_SIGTERM ||
- new_state == SWAP_DEACTIVATING_SIGKILL) {
-
- if (s->control_pid <= 0)
- return -EBADMSG;
+ if (s->control_pid > 0 &&
+ pid_is_unwaited(s->control_pid) &&
+ IN_SET(new_state,
+ SWAP_ACTIVATING,
+ SWAP_ACTIVATING_SIGTERM,
+ SWAP_ACTIVATING_SIGKILL,
+ SWAP_ACTIVATING_DONE,
+ SWAP_DEACTIVATING,
+ SWAP_DEACTIVATING_SIGTERM,
+ SWAP_DEACTIVATING_SIGKILL)) {
r = unit_watch_pid(UNIT(s), s->control_pid);
if (r < 0)
return r;
- r = swap_arm_timer(s);
+ r = swap_arm_timer(s, usec_add(u->state_change_timestamp.monotonic, s->timeout_usec));
if (r < 0)
return r;
}
+ if (!IN_SET(new_state, SWAP_DEAD, SWAP_FAILED))
+ (void) unit_setup_dynamic_creds(u);
+
swap_set_state(s, new_state);
return 0;
}
.apply_permissions = true,
.apply_chroot = true,
.apply_tty_stdin = true,
- .bus_endpoint_fd = -1,
+ .stdin_fd = -1,
+ .stdout_fd = -1,
+ .stderr_fd = -1,
};
assert(s);
if (r < 0)
goto fail;
- r = swap_arm_timer(s);
+ r = unit_setup_dynamic_creds(UNIT(s));
+ if (r < 0)
+ return r;
+
+ r = swap_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_usec));
if (r < 0)
goto fail;
&s->exec_context,
&exec_params,
s->exec_runtime,
+ &s->dynamic_creds,
&pid);
if (r < 0)
goto fail;
if (f != SWAP_SUCCESS)
s->result = f;
+ swap_set_state(s, s->result != SWAP_SUCCESS ? SWAP_FAILED : SWAP_DEAD);
+
exec_runtime_destroy(s->exec_runtime);
s->exec_runtime = exec_runtime_unref(s->exec_runtime);
exec_context_destroy_runtime_directory(&s->exec_context, manager_get_runtime_prefix(UNIT(s)->manager));
- swap_set_state(s, s->result != SWAP_SUCCESS ? SWAP_FAILED : SWAP_DEAD);
+ dynamic_creds_destroy(&s->dynamic_creds);
}
static void swap_enter_active(Swap *s, SwapResult f) {
goto fail;
if (r > 0) {
- r = swap_arm_timer(s);
+ r = swap_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_usec));
if (r < 0)
goto fail;
static int swap_start(Unit *u) {
Swap *s = SWAP(u), *other;
+ int r;
assert(s);
assert(s->state == SWAP_DEAD || s->state == SWAP_FAILED);
- if (detect_container(NULL) > 0)
+ if (detect_container() > 0)
return -EPERM;
/* If there's a job for another swap unit for the same node
if (UNIT(other)->job && UNIT(other)->job->state == JOB_RUNNING)
return -EAGAIN;
+ r = unit_start_limit_test(u);
+ if (r < 0) {
+ swap_enter_dead(s, SWAP_FAILURE_START_LIMIT_HIT);
+ return r;
+ }
+
s->result = SWAP_SUCCESS;
s->reset_cpu_usage = true;
s->state == SWAP_ACTIVATING_DONE ||
s->state == SWAP_ACTIVE);
- if (detect_container(NULL) > 0)
+ if (detect_container() > 0)
return -EPERM;
swap_enter_deactivating(s);
if (other->from_fragment)
return UNIT(other);
- /* Otherwise make everybody follow the unit that's named after
+ /* Otherwise, make everybody follow the unit that's named after
* the swap device in the kernel */
if (streq_ptr(s->what, s->devnode))
m->swap_event_source = sd_event_source_unref(m->swap_event_source);
- if (m->proc_swaps) {
- fclose(m->proc_swaps);
- m->proc_swaps = NULL;
- }
+ m->proc_swaps = safe_fclose(m->proc_swaps);
- hashmap_free(m->swaps_by_devnode);
- m->swaps_by_devnode = NULL;
+ m->swaps_by_devnode = hashmap_free(m->swaps_by_devnode);
}
-static int swap_enumerate(Manager *m) {
+static void swap_enumerate(Manager *m) {
int r;
assert(m);
if (!m->proc_swaps) {
m->proc_swaps = fopen("/proc/swaps", "re");
- if (!m->proc_swaps)
- return errno == ENOENT ? 0 : -errno;
+ if (!m->proc_swaps) {
+ if (errno == ENOENT)
+ log_debug("Not swap enabled, skipping enumeration");
+ else
+ log_error_errno(errno, "Failed to open /proc/swaps: %m");
+
+ return;
+ }
r = sd_event_add_io(m->event, &m->swap_event_source, fileno(m->proc_swaps), EPOLLPRI, swap_dispatch_io, m);
- if (r < 0)
+ if (r < 0) {
+ log_error_errno(r, "Failed to watch /proc/swaps: %m");
goto fail;
+ }
/* Dispatch this before we dispatch SIGCHLD, so that
* we always get the events from /proc/swaps before
* the SIGCHLD of /sbin/swapon. */
r = sd_event_source_set_priority(m->swap_event_source, -10);
- if (r < 0)
+ if (r < 0) {
+ log_error_errno(r, "Failed to change /proc/swaps priority: %m");
goto fail;
+ }
(void) sd_event_source_set_description(m->swap_event_source, "swap-proc");
}
if (r < 0)
goto fail;
- return 0;
+ return;
fail:
swap_shutdown(m);
- return r;
}
int swap_process_device_new(Manager *m, struct udev_device *dev) {
return unit_kill_common(u, who, signo, -1, SWAP(u)->control_pid, error);
}
-static int swap_get_timeout(Unit *u, uint64_t *timeout) {
+static int swap_get_timeout(Unit *u, usec_t *timeout) {
Swap *s = SWAP(u);
+ usec_t t;
int r;
if (!s->timer_event_source)
return 0;
- r = sd_event_source_get_time(s->timer_event_source, timeout);
+ r = sd_event_source_get_time(s->timer_event_source, &t);
if (r < 0)
return r;
+ if (t == USEC_INFINITY)
+ return 0;
+ *timeout = t;
return 1;
}
if (supported < 0)
supported =
access("/proc/swaps", F_OK) >= 0 &&
- detect_container(NULL) <= 0;
+ detect_container() <= 0;
return supported;
}
-static const char* const swap_state_table[_SWAP_STATE_MAX] = {
- [SWAP_DEAD] = "dead",
- [SWAP_ACTIVATING] = "activating",
- [SWAP_ACTIVATING_DONE] = "activating-done",
- [SWAP_ACTIVE] = "active",
- [SWAP_DEACTIVATING] = "deactivating",
- [SWAP_ACTIVATING_SIGTERM] = "activating-sigterm",
- [SWAP_ACTIVATING_SIGKILL] = "activating-sigkill",
- [SWAP_DEACTIVATING_SIGTERM] = "deactivating-sigterm",
- [SWAP_DEACTIVATING_SIGKILL] = "deactivating-sigkill",
- [SWAP_FAILED] = "failed"
-};
+static int swap_control_pid(Unit *u) {
+ Swap *s = SWAP(u);
+
+ assert(s);
-DEFINE_STRING_TABLE_LOOKUP(swap_state, SwapState);
+ return s->control_pid;
+}
static const char* const swap_exec_command_table[_SWAP_EXEC_COMMAND_MAX] = {
[SWAP_EXEC_ACTIVATE] = "ExecActivate",
[SWAP_FAILURE_TIMEOUT] = "timeout",
[SWAP_FAILURE_EXIT_CODE] = "exit-code",
[SWAP_FAILURE_SIGNAL] = "signal",
- [SWAP_FAILURE_CORE_DUMP] = "core-dump"
+ [SWAP_FAILURE_CORE_DUMP] = "core-dump",
+ [SWAP_FAILURE_START_LIMIT_HIT] = "start-limit-hit",
};
DEFINE_STRING_TABLE_LOOKUP(swap_result, SwapResult);
.cgroup_context_offset = offsetof(Swap, cgroup_context),
.kill_context_offset = offsetof(Swap, kill_context),
.exec_runtime_offset = offsetof(Swap, exec_runtime),
+ .dynamic_creds_offset = offsetof(Swap, dynamic_creds),
.sections =
"Unit\0"
"Install\0",
.private_section = "Swap",
- .no_alias = true,
- .no_instances = true,
-
.init = swap_init,
.load = swap_load,
.done = swap_done,
.reset_failed = swap_reset_failed,
- .bus_interface = "org.freedesktop.systemd1.Swap",
+ .control_pid = swap_control_pid,
+
.bus_vtable = bus_swap_vtable,
.bus_set_property = bus_swap_set_property,
.bus_commit_properties = bus_swap_commit_properties,
projects / thirdparty / systemd.git / blobdiff