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-rw-r--r--src/core/swap.c110
1 files changed, 62 insertions, 48 deletions
diff --git a/src/core/swap.c b/src/core/swap.c
index bef457069f..5568898bd7 100644
--- a/src/core/swap.c
+++ b/src/core/swap.c
@@ -20,22 +20,30 @@
***/
#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,
@@ -194,7 +202,7 @@ static int swap_add_device_links(Swap *s) {
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, UNIT(s)->manager->running_as == MANAGER_SYSTEM, UNIT_BINDS_TO);
else
/* File based swap devices need to be ordered after
* systemd-remount-fs.service, since they might need a
@@ -203,14 +211,25 @@ static int swap_add_device_links(Swap *s) {
}
static int swap_add_default_dependencies(Swap *s) {
+ int r;
+
assert(s);
+ if (!UNIT(s)->default_dependencies)
+ return 0;
+
if (UNIT(s)->manager->running_as != MANAGER_SYSTEM)
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);
}
@@ -323,11 +342,9 @@ static int swap_load(Unit *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);
@@ -520,16 +537,16 @@ static int swap_coldplug(Unit *u) {
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)
@@ -597,6 +614,9 @@ static int swap_spawn(Swap *s, ExecCommand *c, pid_t *_pid) {
.apply_chroot = true,
.apply_tty_stdin = true,
.bus_endpoint_fd = -1,
+ .stdin_fd = -1,
+ .stdout_fd = -1,
+ .stderr_fd = -1,
};
assert(s);
@@ -1195,7 +1215,7 @@ static Unit *swap_following(Unit *u) {
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))
@@ -1257,26 +1277,36 @@ static void swap_shutdown(Manager *m) {
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");
}
@@ -1285,11 +1315,10 @@ static int swap_enumerate(Manager *m) {
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) {
@@ -1398,21 +1427,6 @@ static bool swap_supported(void) {
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"
-};
-
-DEFINE_STRING_TABLE_LOOKUP(swap_state, SwapState);
-
static const char* const swap_exec_command_table[_SWAP_EXEC_COMMAND_MAX] = {
[SWAP_EXEC_ACTIVATE] = "ExecActivate",
[SWAP_EXEC_DEACTIVATE] = "ExecDeactivate",
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2025-05-29 12:12:44 +0000