#include "unit-name.h"
#include "dbus-swap.h"
#include "special.h"
-#include "bus-errors.h"
+#include "bus-common-errors.h"
#include "exit-status.h"
#include "def.h"
#include "path-util.h"
#include "virt.h"
+#include "udev-util.h"
static const UnitActiveState state_translation_table[_SWAP_STATE_MAX] = {
[SWAP_DEAD] = UNIT_INACTIVE,
[SWAP_ACTIVATING] = UNIT_ACTIVATING,
+ [SWAP_ACTIVATING_DONE] = UNIT_ACTIVE,
[SWAP_ACTIVE] = UNIT_ACTIVE,
[SWAP_DEACTIVATING] = UNIT_DEACTIVATING,
[SWAP_ACTIVATING_SIGTERM] = UNIT_DEACTIVATING,
[SWAP_FAILED] = UNIT_FAILED
};
-static void swap_unset_proc_swaps(Swap *s) {
- Swap *first;
- Hashmap *swaps;
+static int swap_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata);
+static int swap_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata);
+static void swap_unset_proc_swaps(Swap *s) {
assert(s);
- if (!s->parameters_proc_swaps.what)
+ if (!s->from_proc_swaps)
return;
- /* Remove this unit from the chain of swaps which share the
- * same kernel swap device. */
- swaps = UNIT(s)->manager->swaps_by_proc_swaps;
- first = hashmap_get(swaps, s->parameters_proc_swaps.what);
- LIST_REMOVE(Swap, same_proc_swaps, first, s);
-
- if (first)
- hashmap_remove_and_replace(swaps,
- s->parameters_proc_swaps.what,
- first->parameters_proc_swaps.what,
- first);
- else
- hashmap_remove(swaps, s->parameters_proc_swaps.what);
-
free(s->parameters_proc_swaps.what);
s->parameters_proc_swaps.what = NULL;
+
+ s->from_proc_swaps = false;
+}
+
+static int swap_set_devnode(Swap *s, const char *devnode) {
+ Hashmap *swaps;
+ Swap *first;
+ int r;
+
+ assert(s);
+
+ r = hashmap_ensure_allocated(&UNIT(s)->manager->swaps_by_devnode, &string_hash_ops);
+ if (r < 0)
+ return r;
+
+ swaps = UNIT(s)->manager->swaps_by_devnode;
+
+ if (s->devnode) {
+ first = hashmap_get(swaps, s->devnode);
+
+ LIST_REMOVE(same_devnode, first, s);
+ if (first)
+ hashmap_replace(swaps, first->devnode, first);
+ else
+ hashmap_remove(swaps, s->devnode);
+
+ free(s->devnode);
+ s->devnode = NULL;
+ }
+
+ if (devnode) {
+ s->devnode = strdup(devnode);
+ if (!s->devnode)
+ return -ENOMEM;
+
+ first = hashmap_get(swaps, s->devnode);
+ LIST_PREPEND(same_devnode, first, s);
+
+ return hashmap_replace(swaps, first->devnode, first);
+ }
+
+ return 0;
}
static void swap_init(Unit *u) {
assert(s);
assert(UNIT(s)->load_state == UNIT_STUB);
- s->timeout_usec = DEFAULT_TIMEOUT_USEC;
+ s->timeout_usec = u->manager->default_timeout_start_usec;
- exec_context_init(&s->exec_context);
s->exec_context.std_output = u->manager->default_std_output;
s->exec_context.std_error = u->manager->default_std_error;
- kill_context_init(&s->kill_context);
- cgroup_context_init(&s->cgroup_context);
s->parameters_proc_swaps.priority = s->parameters_fragment.priority = -1;
- s->timer_watch.type = WATCH_INVALID;
-
s->control_command_id = _SWAP_EXEC_COMMAND_INVALID;
- UNIT(s)->ignore_on_isolate = true;
+ u->ignore_on_isolate = true;
}
static void swap_unwatch_control_pid(Swap *s) {
assert(s);
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;
- exec_context_done(&s->exec_context, manager_is_reloading_or_reexecuting(u->manager));
+ free(s->parameters_fragment.options);
+ s->parameters_fragment.options = NULL;
+
+ s->exec_runtime = exec_runtime_unref(s->exec_runtime);
exec_command_done_array(s->exec_command, _SWAP_EXEC_COMMAND_MAX);
s->control_command = NULL;
- cgroup_context_done(&s->cgroup_context);
-
swap_unwatch_control_pid(s);
- unit_unwatch_timer(u, &s->timer_watch);
+ s->timer_event_source = sd_event_source_unref(s->timer_event_source);
}
-int swap_add_one_mount_link(Swap *s, Mount *m) {
- int r;
+static int swap_arm_timer(Swap *s) {
+ int r;
assert(s);
- assert(m);
-
- if (UNIT(s)->load_state != UNIT_LOADED ||
- UNIT(m)->load_state != UNIT_LOADED)
- return 0;
-
- if (is_device_path(s->what))
- return 0;
- if (!path_startswith(s->what, m->where))
+ if (s->timeout_usec <= 0) {
+ s->timer_event_source = sd_event_source_unref(s->timer_event_source);
return 0;
+ }
- r = unit_add_two_dependencies(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true);
- if (r < 0)
- return r;
-
- return 0;
-}
-
-static int swap_add_mount_links(Swap *s) {
- Unit *other;
- int r;
-
- assert(s);
-
- LIST_FOREACH(units_by_type, other, UNIT(s)->manager->units_by_type[UNIT_MOUNT])
- if ((r = swap_add_one_mount_link(s, MOUNT(other))) < 0)
+ if (s->timer_event_source) {
+ r = sd_event_source_set_time(s->timer_event_source, now(CLOCK_MONOTONIC) + s->timeout_usec);
+ if (r < 0)
return r;
- return 0;
+ return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT);
+ }
+
+ return sd_event_add_time(
+ UNIT(s)->manager->event,
+ &s->timer_event_source,
+ CLOCK_MONOTONIC,
+ now(CLOCK_MONOTONIC) + s->timeout_usec, 0,
+ swap_dispatch_timer, s);
}
static int swap_add_device_links(Swap *s) {
- SwapParameters *p;
-
assert(s);
if (!s->what)
return 0;
- if (s->from_fragment)
- p = &s->parameters_fragment;
- else
+ if (!s->from_fragment)
return 0;
if (is_device_path(s->what))
- return unit_add_node_link(UNIT(s), s->what, !p->noauto &&
- UNIT(s)->manager->running_as == SYSTEMD_SYSTEM);
+ return unit_add_node_link(UNIT(s), s->what, UNIT(s)->manager->running_as == SYSTEMD_SYSTEM);
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) {
- bool nofail = false, noauto = false;
- int r;
-
assert(s);
if (UNIT(s)->manager->running_as != SYSTEMD_SYSTEM)
if (detect_container(NULL) > 0)
return 0;
- r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true);
- if (r < 0)
- return r;
-
- if (s->from_fragment) {
- SwapParameters *p = &s->parameters_fragment;
-
- nofail = p->nofail;
- noauto = p->noauto;
- }
-
- if (!noauto) {
- if (nofail)
- r = unit_add_dependency_by_name_inverse(UNIT(s),
- UNIT_WANTS, SPECIAL_SWAP_TARGET, NULL, true);
- else
- r = unit_add_two_dependencies_by_name_inverse(UNIT(s),
- UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SWAP_TARGET, NULL, true);
- if (r < 0)
- return r;
- }
-
- return 0;
+ return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true);
}
static int swap_verify(Swap *s) {
_cleanup_free_ char *e = NULL;
if (UNIT(s)->load_state != UNIT_LOADED)
- return 0;
+ return 0;
e = unit_name_from_path(s->what, ".swap");
- if (e == NULL)
+ if (!e)
return log_oom();
b = unit_has_name(UNIT(s), e);
if (!b) {
- log_error_unit(UNIT(s)->id,
- "%s: Value of \"What\" and unit name do not match, not loading.",
- UNIT(s)->id);
+ log_unit_error(UNIT(s)->id, "%s: Value of \"What\" and unit name do not match, not loading.", UNIT(s)->id);
return -EINVAL;
}
if (s->exec_context.pam_name && s->kill_context.kill_mode != KILL_CONTROL_GROUP) {
- log_error_unit(UNIT(s)->id,
- "%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing to load.",
- UNIT(s)->id);
+ log_unit_error(UNIT(s)->id, "%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing to load.", UNIT(s)->id);
return -EINVAL;
}
return 0;
}
+static int swap_load_devnode(Swap *s) {
+ _cleanup_udev_device_unref_ struct udev_device *d = NULL;
+ struct stat st;
+ const char *p;
+
+ assert(s);
+
+ if (stat(s->what, &st) < 0 || !S_ISBLK(st.st_mode))
+ return 0;
+
+ d = udev_device_new_from_devnum(UNIT(s)->manager->udev, 'b', st.st_rdev);
+ if (!d)
+ return 0;
+
+ p = udev_device_get_devnode(d);
+ if (!p)
+ return 0;
+
+ return swap_set_devnode(s, p);
+}
+
static int swap_load(Unit *u) {
int r;
Swap *s = SWAP(u);
return r;
if (u->load_state == UNIT_LOADED) {
- r = unit_add_exec_dependencies(u, &s->exec_context);
- if (r < 0)
- return r;
if (UNIT(s)->fragment_path)
s->from_fragment = true;
path_kill_slashes(s->what);
- if (!UNIT(s)->description)
- if ((r = unit_set_description(u, s->what)) < 0)
+ if (!UNIT(s)->description) {
+ r = unit_set_description(u, s->what);
+ if (r < 0)
return r;
+ }
+
+ r = unit_require_mounts_for(UNIT(s), s->what);
+ if (r < 0)
+ return r;
r = swap_add_device_links(s);
if (r < 0)
return r;
- r = swap_add_mount_links(s);
+ r = swap_load_devnode(s);
+ if (r < 0)
+ return r;
+
+ r = unit_patch_contexts(u);
if (r < 0)
return r;
- r = unit_add_default_slice(u);
+ r = unit_add_exec_dependencies(u, &s->exec_context);
+ if (r < 0)
+ return r;
+
+ r = unit_add_default_slice(u, &s->cgroup_context);
if (r < 0)
return r;
if (r < 0)
return r;
}
-
- r = unit_exec_context_defaults(u, &s->exec_context);
- if (r < 0)
- return r;
}
return swap_verify(s);
const char *what,
const char *what_proc_swaps,
int priority,
- bool noauto,
- bool nofail,
bool set_flags) {
- Unit *u = NULL;
_cleanup_free_ char *e = NULL;
- char *wp = NULL;
bool delete = false;
+ Unit *u = NULL;
int r;
SwapParameters *p;
- Swap *first;
assert(m);
assert(what);
p = &SWAP(u)->parameters_proc_swaps;
if (!p->what) {
- wp = strdup(what_proc_swaps);
- if (!wp) {
- r = log_oom();
+ p->what = strdup(what_proc_swaps);
+ if (!p->what) {
+ r = -ENOMEM;
goto fail;
}
-
- if (!m->swaps_by_proc_swaps) {
- m->swaps_by_proc_swaps = hashmap_new(string_hash_func, string_compare_func);
- if (!m->swaps_by_proc_swaps) {
- r = log_oom();
- goto fail;
- }
- }
-
- free(p->what);
- p->what = wp;
-
- first = hashmap_get(m->swaps_by_proc_swaps, wp);
- LIST_PREPEND(Swap, same_proc_swaps, first, SWAP(u));
-
- r = hashmap_replace(m->swaps_by_proc_swaps, wp, first);
- if (r < 0)
- goto fail;
}
if (set_flags) {
SWAP(u)->from_proc_swaps = true;
p->priority = priority;
- p->noauto = noauto;
- p->nofail = nofail;
unit_add_to_dbus_queue(u);
return 0;
fail:
- log_warning_unit(e, "Failed to load swap unit: %s", strerror(-r));
-
- free(wp);
+ log_unit_warning_errno(e, r, "Failed to load swap unit: %m");
if (delete && u)
unit_free(u);
}
static int swap_process_new_swap(Manager *m, const char *device, int prio, bool set_flags) {
+ _cleanup_udev_device_unref_ struct udev_device *d = NULL;
+ struct udev_list_entry *item = NULL, *first = NULL;
+ const char *dn;
struct stat st;
- int r = 0, k;
+ int r;
assert(m);
- if (stat(device, &st) >= 0 && S_ISBLK(st.st_mode)) {
- struct udev_device *d;
- const char *dn;
- struct udev_list_entry *item = NULL, *first = NULL;
+ r = swap_add_one(m, device, device, prio, set_flags);
+ if (r < 0)
+ return r;
- /* So this is a proper swap device. Create swap units
- * for all names this swap device is known under */
+ /* If this is a block device, then let's add duplicates for
+ * all other names of this block device */
+ if (stat(device, &st) < 0 || !S_ISBLK(st.st_mode))
+ return 0;
- d = udev_device_new_from_devnum(m->udev, 'b', st.st_rdev);
- if (!d)
- return log_oom();
+ d = udev_device_new_from_devnum(m->udev, 'b', st.st_rdev);
+ if (!d)
+ return 0;
- dn = udev_device_get_devnode(d);
- /* Skip dn==device, since that case will be handled below */
- if (dn && !streq(dn, device))
- r = swap_add_one(m, dn, device, prio, false, false, set_flags);
+ /* Add the main device node */
+ dn = udev_device_get_devnode(d);
+ if (dn && !streq(dn, device))
+ swap_add_one(m, dn, device, prio, set_flags);
- /* Add additional units for all symlinks */
- first = udev_device_get_devlinks_list_entry(d);
- udev_list_entry_foreach(item, first) {
- const char *p;
+ /* Add additional units for all symlinks */
+ first = udev_device_get_devlinks_list_entry(d);
+ udev_list_entry_foreach(item, first) {
+ const char *p;
- /* Don't bother with the /dev/block links */
- p = udev_list_entry_get_name(item);
+ /* Don't bother with the /dev/block links */
+ p = udev_list_entry_get_name(item);
- if (path_startswith(p, "/dev/block/"))
- continue;
+ if (streq(p, device))
+ continue;
- if (stat(p, &st) >= 0)
- if ((!S_ISBLK(st.st_mode)) ||
- st.st_rdev != udev_device_get_devnum(d))
- continue;
+ if (path_startswith(p, "/dev/block/"))
+ continue;
- k = swap_add_one(m, p, device, prio, false, false, set_flags);
- if (k < 0)
- r = k;
- }
+ if (stat(p, &st) >= 0)
+ if (!S_ISBLK(st.st_mode) ||
+ st.st_rdev != udev_device_get_devnum(d))
+ continue;
- udev_device_unref(d);
+ swap_add_one(m, p, device, prio, set_flags);
}
- k = swap_add_one(m, device, device, prio, false, false, set_flags);
- if (k < 0)
- r = k;
-
return r;
}
if (state != SWAP_ACTIVATING &&
state != SWAP_ACTIVATING_SIGTERM &&
state != SWAP_ACTIVATING_SIGKILL &&
+ state != SWAP_ACTIVATING_DONE &&
state != SWAP_DEACTIVATING &&
state != SWAP_DEACTIVATING_SIGTERM &&
state != SWAP_DEACTIVATING_SIGKILL) {
- unit_unwatch_timer(UNIT(s), &s->timer_watch);
+ s->timer_event_source = sd_event_source_unref(s->timer_event_source);
swap_unwatch_control_pid(s);
s->control_command = NULL;
s->control_command_id = _SWAP_EXEC_COMMAND_INVALID;
}
if (state != old_state)
- log_debug_unit(UNIT(s)->id,
+ log_unit_debug(UNIT(s)->id,
"%s changed %s -> %s",
UNIT(s)->id,
swap_state_to_string(old_state),
swap_state_to_string(state));
- unit_notify(UNIT(s), state_translation_table[old_state],
- state_translation_table[state], true);
+ unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], true);
}
static int swap_coldplug(Unit *u) {
else if (s->from_proc_swaps)
new_state = SWAP_ACTIVE;
- if (new_state != s->state) {
+ 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_DEACTIVATING ||
- new_state == SWAP_DEACTIVATING_SIGTERM ||
- new_state == SWAP_DEACTIVATING_SIGKILL) {
+ 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)
+ return -EBADMSG;
- r = unit_watch_pid(UNIT(s), s->control_pid);
- if (r < 0)
- return r;
-
- r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true, s->timeout_usec, &s->timer_watch);
- if (r < 0)
- return r;
- }
+ r = unit_watch_pid(UNIT(s), s->control_pid);
+ if (r < 0)
+ return r;
- swap_set_state(s, new_state);
+ r = swap_arm_timer(s);
+ if (r < 0)
+ return r;
}
+ swap_set_state(s, new_state);
return 0;
}
prefix, yes_no(s->from_proc_swaps),
prefix, yes_no(s->from_fragment));
+ if (s->devnode)
+ fprintf(f, "%sDevice Node: %s\n", prefix, s->devnode);
+
if (p)
fprintf(f,
"%sPriority: %i\n"
- "%sNoAuto: %s\n"
- "%sNoFail: %s\n",
+ "%sOptions: %s\n",
prefix, p->priority,
- prefix, yes_no(p->noauto),
- prefix, yes_no(p->nofail));
+ prefix, strempty(p->options));
if (s->control_pid > 0)
fprintf(f,
- "%sControl PID: %lu\n",
- prefix, (unsigned long) s->control_pid);
+ "%sControl PID: "PID_FMT"\n",
+ prefix, s->control_pid);
exec_context_dump(&s->exec_context, f, prefix);
kill_context_dump(&s->kill_context, f, prefix);
static int swap_spawn(Swap *s, ExecCommand *c, pid_t *_pid) {
pid_t pid;
int r;
+ ExecParameters exec_params = {
+ .apply_permissions = true,
+ .apply_chroot = true,
+ .apply_tty_stdin = true,
+ };
assert(s);
assert(c);
unit_realize_cgroup(UNIT(s));
- r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true, s->timeout_usec, &s->timer_watch);
+ r = unit_setup_exec_runtime(UNIT(s));
if (r < 0)
goto fail;
+ r = swap_arm_timer(s);
+ if (r < 0)
+ goto fail;
+
+ exec_params.environment = UNIT(s)->manager->environment;
+ exec_params.confirm_spawn = UNIT(s)->manager->confirm_spawn;
+ exec_params.cgroup_supported = UNIT(s)->manager->cgroup_supported;
+ exec_params.cgroup_path = UNIT(s)->cgroup_path;
+ exec_params.cgroup_delegate = s->cgroup_context.delegate;
+ exec_params.runtime_prefix = manager_get_runtime_prefix(UNIT(s)->manager);
+ exec_params.unit_id = UNIT(s)->id;
+
r = exec_spawn(c,
- NULL,
&s->exec_context,
- NULL, 0,
- UNIT(s)->manager->environment,
- true,
- true,
- true,
- UNIT(s)->manager->confirm_spawn,
- UNIT(s)->manager->cgroup_supported,
- UNIT(s)->cgroup_path,
- UNIT(s)->id,
- NULL,
+ &exec_params,
+ s->exec_runtime,
&pid);
if (r < 0)
goto fail;
return 0;
fail:
- unit_unwatch_timer(UNIT(s), &s->timer_watch);
+ s->timer_event_source = sd_event_source_unref(s->timer_event_source);
return r;
}
if (f != SWAP_SUCCESS)
s->result = f;
- exec_context_tmp_dirs_done(&s->exec_context);
+ 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);
}
r = unit_kill_context(
UNIT(s),
&s->kill_context,
- state != SWAP_ACTIVATING_SIGTERM && state != SWAP_DEACTIVATING_SIGTERM,
+ (state != SWAP_ACTIVATING_SIGTERM && state != SWAP_DEACTIVATING_SIGTERM) ?
+ KILL_KILL : KILL_TERMINATE,
-1,
s->control_pid,
false);
goto fail;
if (r > 0) {
- r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true, s->timeout_usec, &s->timer_watch);
+ r = swap_arm_timer(s);
if (r < 0)
goto fail;
swap_set_state(s, state);
- } else
+ } else if (state == SWAP_ACTIVATING_SIGTERM)
+ swap_enter_signal(s, SWAP_ACTIVATING_SIGKILL, SWAP_SUCCESS);
+ else if (state == SWAP_DEACTIVATING_SIGTERM)
+ swap_enter_signal(s, SWAP_DEACTIVATING_SIGKILL, SWAP_SUCCESS);
+ else
swap_enter_dead(s, SWAP_SUCCESS);
return;
fail:
- log_warning_unit(UNIT(s)->id,
+ log_unit_warning(UNIT(s)->id,
"%s failed to kill processes: %s", UNIT(s)->id, strerror(-r));
swap_enter_dead(s, SWAP_FAILURE_RESOURCES);
}
+static int mount_find_pri(const char *options, int *ret) {
+ const char *opt;
+ char *end;
+ unsigned long r;
+
+ assert(ret);
+
+ if (!options)
+ return 0;
+
+ opt = mount_test_option(options, "pri");
+ if (!opt)
+ return 0;
+
+ opt += strlen("pri");
+ if (*opt != '=')
+ return -EINVAL;
+
+ errno = 0;
+ r = strtoul(opt + 1, &end, 10);
+ if (errno > 0)
+ return -errno;
+
+ if (end == opt + 1 || (*end != ',' && *end != 0))
+ return -EINVAL;
+
+ *ret = (int) r;
+ return 1;
+}
+
+static int mount_find_discard(const char *options, char **ret) {
+ const char *opt;
+ char *ans;
+ size_t len;
+
+ assert(ret);
+
+ if (!options)
+ return 0;
+
+ opt = mount_test_option(options, "discard");
+ if (!opt)
+ return 0;
+
+ opt += strlen("discard");
+ if (*opt == ',' || *opt == '\0')
+ ans = strdup("all");
+ else {
+ if (*opt != '=')
+ return -EINVAL;
+
+ len = strcspn(opt + 1, ",");
+ if (len == 0)
+ return -EINVAL;
+
+ ans = strndup(opt + 1, len);
+ }
+
+ if (!ans)
+ return -ENOMEM;
+
+ *ret = ans;
+ return 1;
+}
+
static void swap_enter_activating(Swap *s) {
- int r, priority;
+ _cleanup_free_ char *discard = NULL;
+ int r, priority = -1;
assert(s);
s->control_command_id = SWAP_EXEC_ACTIVATE;
s->control_command = s->exec_command + SWAP_EXEC_ACTIVATE;
- if (s->from_fragment)
+ if (s->from_fragment) {
+ mount_find_discard(s->parameters_fragment.options, &discard);
+
priority = s->parameters_fragment.priority;
- else
- priority = -1;
+ if (priority < 0)
+ mount_find_pri(s->parameters_fragment.options, &priority);
+ }
+
+ r = exec_command_set(s->control_command, "/sbin/swapon", NULL);
+ if (r < 0)
+ goto fail;
if (priority >= 0) {
- char p[LINE_MAX];
-
- snprintf(p, sizeof(p), "%i", priority);
- char_array_0(p);
-
- r = exec_command_set(
- s->control_command,
- "/sbin/swapon",
- "-p",
- p,
- s->what,
- NULL);
- } else
- r = exec_command_set(
- s->control_command,
- "/sbin/swapon",
- s->what,
- NULL);
+ char p[DECIMAL_STR_MAX(int)];
+
+ sprintf(p, "%i", priority);
+ r = exec_command_append(s->control_command, "-p", p, NULL);
+ if (r < 0)
+ goto fail;
+ }
+
+ if (discard && !streq(discard, "none")) {
+ const char *discard_arg;
+ if (streq(discard, "all"))
+ discard_arg = "--discard";
+ else
+ discard_arg = strappenda("--discard=", discard);
+
+ r = exec_command_append(s->control_command, discard_arg, NULL);
+ if (r < 0)
+ goto fail;
+ }
+
+ r = exec_command_append(s->control_command, s->what, NULL);
if (r < 0)
goto fail;
return;
fail:
- log_warning_unit(UNIT(s)->id,
+ log_unit_warning(UNIT(s)->id,
"%s failed to run 'swapon' task: %s",
UNIT(s)->id, strerror(-r));
swap_enter_dead(s, SWAP_FAILURE_RESOURCES);
return;
fail:
- log_warning_unit(UNIT(s)->id,
+ log_unit_warning(UNIT(s)->id,
"%s failed to run 'swapoff' task: %s",
UNIT(s)->id, strerror(-r));
swap_enter_active(s, SWAP_FAILURE_RESOURCES);
return 0;
assert(s->state == SWAP_ACTIVATING ||
+ s->state == SWAP_ACTIVATING_DONE ||
s->state == SWAP_ACTIVE);
if (detect_container(NULL) > 0)
unit_serialize_item(u, f, "result", swap_result_to_string(s->result));
if (s->control_pid > 0)
- unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
+ unit_serialize_item_format(u, f, "control-pid", PID_FMT, s->control_pid);
if (s->control_command_id >= 0)
unit_serialize_item(u, f, "control-command", swap_exec_command_to_string(s->control_command_id));
- exec_context_serialize(&s->exec_context, UNIT(s), f);
-
return 0;
}
state = swap_state_from_string(value);
if (state < 0)
- log_debug_unit(u->id, "Failed to parse state value %s", value);
+ log_unit_debug(u->id, "Failed to parse state value %s", value);
else
s->deserialized_state = state;
} else if (streq(key, "result")) {
f = swap_result_from_string(value);
if (f < 0)
- log_debug_unit(u->id, "Failed to parse result value %s", value);
+ log_unit_debug(u->id, "Failed to parse result value %s", value);
else if (f != SWAP_SUCCESS)
s->result = f;
} else if (streq(key, "control-pid")) {
pid_t pid;
if (parse_pid(value, &pid) < 0)
- log_debug_unit(u->id, "Failed to parse control-pid value %s", value);
+ log_unit_debug(u->id, "Failed to parse control-pid value %s", value);
else
s->control_pid = pid;
id = swap_exec_command_from_string(value);
if (id < 0)
- log_debug_unit(u->id, "Failed to parse exec-command value %s", value);
+ log_unit_debug(u->id, "Failed to parse exec-command value %s", value);
else {
s->control_command_id = id;
s->control_command = s->exec_command + id;
}
- } else if (streq(key, "tmp-dir")) {
- char *t;
-
- t = strdup(value);
- if (!t)
- return log_oom();
-
- s->exec_context.tmp_dir = t;
- } else if (streq(key, "var-tmp-dir")) {
- char *t;
-
- t = strdup(value);
- if (!t)
- return log_oom();
-
- s->exec_context.var_tmp_dir = t;
} else
- log_debug_unit(u->id, "Unknown serialization key '%s'", key);
+ log_unit_debug(u->id, "Unknown serialization key '%s'", key);
return 0;
}
s->control_command_id = _SWAP_EXEC_COMMAND_INVALID;
}
- log_full_unit(f == SWAP_SUCCESS ? LOG_DEBUG : LOG_NOTICE,
- u->id,
+ log_unit_full(u->id,
+ f == SWAP_SUCCESS ? LOG_DEBUG : LOG_NOTICE,
"%s swap process exited, code=%s status=%i",
u->id, sigchld_code_to_string(code), status);
switch (s->state) {
case SWAP_ACTIVATING:
+ case SWAP_ACTIVATING_DONE:
case SWAP_ACTIVATING_SIGTERM:
case SWAP_ACTIVATING_SIGKILL:
case SWAP_DEACTIVATING_SIGKILL:
case SWAP_DEACTIVATING_SIGTERM:
- if (f == SWAP_SUCCESS)
- swap_enter_dead(s, f);
- else
- swap_enter_dead(s, f);
+ swap_enter_dead(s, f);
break;
default:
/* Notify clients about changed exit status */
unit_add_to_dbus_queue(u);
-
- /* Request a reload of /proc/swaps, so that following units
- * can follow our state change */
- u->manager->request_reload = true;
}
-static void swap_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
- Swap *s = SWAP(u);
+static int swap_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) {
+ Swap *s = SWAP(userdata);
assert(s);
- assert(elapsed == 1);
- assert(w == &s->timer_watch);
+ assert(s->timer_event_source == source);
switch (s->state) {
case SWAP_ACTIVATING:
- log_warning_unit(u->id, "%s activation timed out. Stopping.", u->id);
+ case SWAP_ACTIVATING_DONE:
+ log_unit_warning(UNIT(s)->id, "%s activation timed out. Stopping.", UNIT(s)->id);
swap_enter_signal(s, SWAP_ACTIVATING_SIGTERM, SWAP_FAILURE_TIMEOUT);
break;
case SWAP_DEACTIVATING:
- log_warning_unit(u->id, "%s deactivation timed out. Stopping.", u->id);
+ log_unit_warning(UNIT(s)->id, "%s deactivation timed out. Stopping.", UNIT(s)->id);
swap_enter_signal(s, SWAP_DEACTIVATING_SIGTERM, SWAP_FAILURE_TIMEOUT);
break;
case SWAP_ACTIVATING_SIGTERM:
if (s->kill_context.send_sigkill) {
- log_warning_unit(u->id, "%s activation timed out. Killing.", u->id);
+ log_unit_warning(UNIT(s)->id, "%s activation timed out. Killing.", UNIT(s)->id);
swap_enter_signal(s, SWAP_ACTIVATING_SIGKILL, SWAP_FAILURE_TIMEOUT);
} else {
- log_warning_unit(u->id, "%s activation timed out. Skipping SIGKILL. Ignoring.", u->id);
+ log_unit_warning(UNIT(s)->id, "%s activation timed out. Skipping SIGKILL. Ignoring.", UNIT(s)->id);
swap_enter_dead(s, SWAP_FAILURE_TIMEOUT);
}
break;
case SWAP_DEACTIVATING_SIGTERM:
if (s->kill_context.send_sigkill) {
- log_warning_unit(u->id, "%s deactivation timed out. Killing.", u->id);
+ log_unit_warning(UNIT(s)->id, "%s deactivation timed out. Killing.", UNIT(s)->id);
swap_enter_signal(s, SWAP_DEACTIVATING_SIGKILL, SWAP_FAILURE_TIMEOUT);
} else {
- log_warning_unit(u->id, "%s deactivation timed out. Skipping SIGKILL. Ignoring.", u->id);
+ log_unit_warning(UNIT(s)->id, "%s deactivation timed out. Skipping SIGKILL. Ignoring.", UNIT(s)->id);
swap_enter_dead(s, SWAP_FAILURE_TIMEOUT);
}
break;
case SWAP_ACTIVATING_SIGKILL:
case SWAP_DEACTIVATING_SIGKILL:
- log_warning_unit(u->id, "%s swap process still around after SIGKILL. Ignoring.", u->id);
+ log_unit_warning(UNIT(s)->id, "%s swap process still around after SIGKILL. Ignoring.", UNIT(s)->id);
swap_enter_dead(s, SWAP_FAILURE_TIMEOUT);
break;
default:
assert_not_reached("Timeout at wrong time.");
}
+
+ return 0;
}
static int swap_load_proc_swaps(Manager *m, bool set_flags) {
return r;
}
-int swap_dispatch_reload(Manager *m) {
- /* This function should go as soon as the kernel properly notifies us */
-
- if (_likely_(!m->request_reload))
- return 0;
-
- m->request_reload = false;
-
- return swap_fd_event(m, EPOLLPRI);
-}
-
-int swap_fd_event(Manager *m, int events) {
+static int swap_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
+ Manager *m = userdata;
Unit *u;
int r;
assert(m);
- assert(events & EPOLLPRI);
+ assert(revents & EPOLLPRI);
r = swap_load_proc_swaps(m, true);
if (r < 0) {
- log_error("Failed to reread /proc/swaps: %s", strerror(-r));
+ log_error_errno(r, "Failed to reread /proc/swaps: %m");
/* Reset flags, just in case, for late calls */
LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_SWAP]) {
if (!swap->is_active) {
/* This has just been deactivated */
- swap->from_proc_swaps = false;
swap_unset_proc_swaps(swap);
switch (swap->state) {
break;
default:
+ /* Fire again */
swap_set_state(swap, swap->state);
break;
}
swap_enter_active(swap, SWAP_SUCCESS);
break;
+ case SWAP_ACTIVATING:
+ swap_set_state(swap, SWAP_ACTIVATING_DONE);
+ break;
+
default:
/* Nothing really changed, but let's
* issue an notification call
assert(s);
- if (streq_ptr(s->what, s->parameters_proc_swaps.what))
+ /* If the user configured the swap through /etc/fstab or
+ * a device unit, follow that. */
+
+ if (s->from_fragment)
return NULL;
- /* Make everybody follow the unit that's named after the swap
- * device in the kernel */
+ LIST_FOREACH_AFTER(same_devnode, other, s)
+ if (other->from_fragment)
+ return UNIT(other);
+
+ LIST_FOREACH_BEFORE(same_devnode, other, s)
+ if (other->from_fragment)
+ return UNIT(other);
+
+ /* Otherwise make everybody follow the unit that's named after
+ * the swap device in the kernel */
+
+ if (streq_ptr(s->what, s->devnode))
+ return NULL;
- LIST_FOREACH_AFTER(same_proc_swaps, other, s)
- if (streq_ptr(other->what, other->parameters_proc_swaps.what))
+ LIST_FOREACH_AFTER(same_devnode, other, s)
+ if (streq_ptr(other->what, other->devnode))
return UNIT(other);
- LIST_FOREACH_BEFORE(same_proc_swaps, other, s) {
- if (streq_ptr(other->what, other->parameters_proc_swaps.what))
+ LIST_FOREACH_BEFORE(same_devnode, other, s) {
+ if (streq_ptr(other->what, other->devnode))
return UNIT(other);
first = other;
}
+ /* Fall back to the first on the list */
return UNIT(first);
}
static int swap_following_set(Unit *u, Set **_set) {
- Swap *s = SWAP(u);
- Swap *other;
+ Swap *s = SWAP(u), *other;
Set *set;
int r;
assert(s);
assert(_set);
- if (LIST_JUST_US(same_proc_swaps, s)) {
+ if (LIST_JUST_US(same_devnode, s)) {
*_set = NULL;
return 0;
}
- if (!(set = set_new(NULL, NULL)))
+ set = set_new(NULL);
+ if (!set)
return -ENOMEM;
- LIST_FOREACH_AFTER(same_proc_swaps, other, s)
- if ((r = set_put(set, other)) < 0)
+ LIST_FOREACH_AFTER(same_devnode, other, s) {
+ r = set_put(set, other);
+ if (r < 0)
goto fail;
+ }
- LIST_FOREACH_BEFORE(same_proc_swaps, other, s)
- if ((r = set_put(set, other)) < 0)
+ LIST_FOREACH_BEFORE(same_devnode, other, s) {
+ r = set_put(set, other);
+ if (r < 0)
goto fail;
+ }
*_set = set;
return 1;
static void swap_shutdown(Manager *m) {
assert(m);
+ m->swap_event_source = sd_event_source_unref(m->swap_event_source);
+
if (m->proc_swaps) {
fclose(m->proc_swaps);
m->proc_swaps = NULL;
}
- hashmap_free(m->swaps_by_proc_swaps);
- m->swaps_by_proc_swaps = NULL;
+ hashmap_free(m->swaps_by_devnode);
+ m->swaps_by_devnode = NULL;
}
static int swap_enumerate(Manager *m) {
int r;
+
assert(m);
if (!m->proc_swaps) {
- struct epoll_event ev = {
- .events = EPOLLPRI,
- .data.ptr = &m->swap_watch,
- };
-
m->proc_swaps = fopen("/proc/swaps", "re");
if (!m->proc_swaps)
- return (errno == ENOENT) ? 0 : -errno;
+ return errno == ENOENT ? 0 : -errno;
- m->swap_watch.type = WATCH_SWAP;
- m->swap_watch.fd = fileno(m->proc_swaps);
+ r = sd_event_add_io(m->event, &m->swap_event_source, fileno(m->proc_swaps), EPOLLPRI, swap_dispatch_io, m);
+ if (r < 0)
+ goto fail;
- if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->swap_watch.fd, &ev) < 0)
- return -errno;
+ /* 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)
+ goto fail;
}
r = swap_load_proc_swaps(m, false);
if (r < 0)
- swap_shutdown(m);
+ goto fail;
+
+ return 0;
+
+fail:
+ swap_shutdown(m);
+ return r;
+}
+
+int swap_process_new_device(Manager *m, struct udev_device *dev) {
+ struct udev_list_entry *item = NULL, *first = NULL;
+ _cleanup_free_ char *e = NULL;
+ const char *dn;
+ Swap *s;
+ int r = 0;
+
+ assert(m);
+ assert(dev);
+
+ dn = udev_device_get_devnode(dev);
+ if (!dn)
+ return 0;
+
+ e = unit_name_from_path(dn, ".swap");
+ if (!e)
+ return -ENOMEM;
+
+ s = hashmap_get(m->units, e);
+ if (s)
+ r = swap_set_devnode(s, dn);
+
+ first = udev_device_get_devlinks_list_entry(dev);
+ udev_list_entry_foreach(item, first) {
+ _cleanup_free_ char *n = NULL;
+
+ n = unit_name_from_path(udev_list_entry_get_name(item), ".swap");
+ if (!n)
+ return -ENOMEM;
+
+ s = hashmap_get(m->units, n);
+ if (s) {
+ int q;
+
+ q = swap_set_devnode(s, dn);
+ if (q < 0)
+ r = q;
+ }
+ }
+
+ return r;
+}
+
+int swap_process_removed_device(Manager *m, struct udev_device *dev) {
+ const char *dn;
+ int r = 0;
+ Swap *s;
+
+ dn = udev_device_get_devnode(dev);
+ if (!dn)
+ return 0;
+
+ while ((s = hashmap_get(m->swaps_by_devnode, dn))) {
+ int q;
+
+ q = swap_set_devnode(s, NULL);
+ if (q < 0)
+ r = q;
+ }
return r;
}
s->result = SWAP_SUCCESS;
}
-static int swap_kill(Unit *u, KillWho who, int signo, DBusError *error) {
+static int swap_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) {
return unit_kill_common(u, who, signo, -1, SWAP(u)->control_pid, error);
}
+static int swap_get_timeout(Unit *u, uint64_t *timeout) {
+ Swap *s = SWAP(u);
+ int r;
+
+ if (!s->timer_event_source)
+ return 0;
+
+ r = sd_event_source_get_time(s->timer_event_source, timeout);
+ if (r < 0)
+ return r;
+
+ return 1;
+}
+
+static bool swap_supported(Manager *m) {
+ static int supported = -1;
+
+ /* If swap support is not available in the kernel, or we are
+ * running in a container we don't support swap units, and any
+ * attempts to starting one should fail immediately. */
+
+ if (supported < 0)
+ supported =
+ access("/proc/swaps", F_OK) >= 0 &&
+ detect_container(NULL) <= 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",
const UnitVTable swap_vtable = {
.object_size = sizeof(Swap),
+ .exec_context_offset = offsetof(Swap, exec_context),
+ .cgroup_context_offset = offsetof(Swap, cgroup_context),
+ .kill_context_offset = offsetof(Swap, kill_context),
+ .exec_runtime_offset = offsetof(Swap, exec_runtime),
.sections =
"Unit\0"
"Swap\0"
"Install\0",
-
.private_section = "Swap",
- .exec_context_offset = offsetof(Swap, exec_context),
- .cgroup_context_offset = offsetof(Swap, cgroup_context),
.no_alias = true,
.no_instances = true,
.kill = swap_kill,
+ .get_timeout = swap_get_timeout,
+
.serialize = swap_serialize,
.deserialize_item = swap_deserialize_item,
.check_gc = swap_check_gc,
.sigchld_event = swap_sigchld_event,
- .timer_event = swap_timer_event,
.reset_failed = swap_reset_failed,
.bus_interface = "org.freedesktop.systemd1.Swap",
- .bus_message_handler = bus_swap_message_handler,
- .bus_invalidating_properties = bus_swap_invalidating_properties,
+ .bus_vtable = bus_swap_vtable,
.bus_set_property = bus_swap_set_property,
.bus_commit_properties = bus_swap_commit_properties,
.enumerate = swap_enumerate,
.shutdown = swap_shutdown,
+ .supported = swap_supported,
.status_message_formats = {
.starting_stopping = {
~ianmdlvl / elogind.git / blobdiff