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-rw-r--r--src/core/manager-serialize.c539
1 files changed, 539 insertions, 0 deletions
diff --git a/src/core/manager-serialize.c b/src/core/manager-serialize.c
new file mode 100644
index 0000000..e9d567a
--- /dev/null
+++ b/src/core/manager-serialize.c
@@ -0,0 +1,539 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include "clean-ipc.h"
+#include "core-varlink.h"
+#include "dbus.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "format-util.h"
+#include "initrd-util.h"
+#include "macro.h"
+#include "manager-serialize.h"
+#include "manager.h"
+#include "parse-util.h"
+#include "serialize.h"
+#include "syslog-util.h"
+#include "unit-serialize.h"
+#include "user-util.h"
+#include "varlink-internal.h"
+
+int manager_open_serialization(Manager *m, FILE **ret_f) {
+ assert(ret_f);
+
+ return open_serialization_file("systemd-state", ret_f);
+}
+
+static bool manager_timestamp_shall_serialize(ManagerTimestamp t) {
+ if (!in_initrd())
+ return true;
+
+ /* The following timestamps only apply to the host system, hence only serialize them there */
+ return !IN_SET(t,
+ MANAGER_TIMESTAMP_USERSPACE, MANAGER_TIMESTAMP_FINISH,
+ MANAGER_TIMESTAMP_SECURITY_START, MANAGER_TIMESTAMP_SECURITY_FINISH,
+ MANAGER_TIMESTAMP_GENERATORS_START, MANAGER_TIMESTAMP_GENERATORS_FINISH,
+ MANAGER_TIMESTAMP_UNITS_LOAD_START, MANAGER_TIMESTAMP_UNITS_LOAD_FINISH);
+}
+
+static void manager_serialize_uid_refs_internal(
+ FILE *f,
+ Hashmap *uid_refs,
+ const char *field_name) {
+
+ void *p, *k;
+
+ assert(f);
+ assert(field_name);
+
+ /* Serialize the UID reference table. Or actually, just the IPC destruction flag of it, as
+ * the actual counter of it is better rebuild after a reload/reexec. */
+
+ HASHMAP_FOREACH_KEY(p, k, uid_refs) {
+ uint32_t c;
+ uid_t uid;
+
+ uid = PTR_TO_UID(k);
+ c = PTR_TO_UINT32(p);
+
+ if (!(c & DESTROY_IPC_FLAG))
+ continue;
+
+ (void) serialize_item_format(f, field_name, UID_FMT, uid);
+ }
+}
+
+static void manager_serialize_uid_refs(Manager *m, FILE *f) {
+ manager_serialize_uid_refs_internal(f, m->uid_refs, "destroy-ipc-uid");
+}
+
+static void manager_serialize_gid_refs(Manager *m, FILE *f) {
+ manager_serialize_uid_refs_internal(f, m->gid_refs, "destroy-ipc-gid");
+}
+
+int manager_serialize(
+ Manager *m,
+ FILE *f,
+ FDSet *fds,
+ bool switching_root) {
+
+ const char *t;
+ Unit *u;
+ int r;
+
+ assert(m);
+ assert(f);
+ assert(fds);
+
+ _cleanup_(manager_reloading_stopp) _unused_ Manager *reloading = manager_reloading_start(m);
+
+ (void) serialize_item_format(f, "current-job-id", "%" PRIu32, m->current_job_id);
+ (void) serialize_item_format(f, "n-installed-jobs", "%u", m->n_installed_jobs);
+ (void) serialize_item_format(f, "n-failed-jobs", "%u", m->n_failed_jobs);
+ (void) serialize_bool(f, "ready-sent", m->ready_sent);
+ (void) serialize_bool(f, "taint-logged", m->taint_logged);
+ (void) serialize_bool(f, "service-watchdogs", m->service_watchdogs);
+
+ if (m->show_status_overridden != _SHOW_STATUS_INVALID)
+ (void) serialize_item(f, "show-status-overridden",
+ show_status_to_string(m->show_status_overridden));
+
+ if (m->log_level_overridden)
+ (void) serialize_item_format(f, "log-level-override", "%i", log_get_max_level());
+ if (m->log_target_overridden)
+ (void) serialize_item(f, "log-target-override", log_target_to_string(log_get_target()));
+
+ (void) serialize_usec(f, "runtime-watchdog-overridden", m->watchdog_overridden[WATCHDOG_RUNTIME]);
+ (void) serialize_usec(f, "reboot-watchdog-overridden", m->watchdog_overridden[WATCHDOG_REBOOT]);
+ (void) serialize_usec(f, "kexec-watchdog-overridden", m->watchdog_overridden[WATCHDOG_KEXEC]);
+ (void) serialize_usec(f, "pretimeout-watchdog-overridden", m->watchdog_overridden[WATCHDOG_PRETIMEOUT]);
+ (void) serialize_item(f, "pretimeout-watchdog-governor-overridden", m->watchdog_pretimeout_governor_overridden);
+
+ for (ManagerTimestamp q = 0; q < _MANAGER_TIMESTAMP_MAX; q++) {
+ _cleanup_free_ char *joined = NULL;
+
+ if (!manager_timestamp_shall_serialize(q))
+ continue;
+
+ joined = strjoin(manager_timestamp_to_string(q), "-timestamp");
+ if (!joined)
+ return log_oom();
+
+ (void) serialize_dual_timestamp(f, joined, m->timestamps + q);
+ }
+
+ if (!switching_root)
+ (void) serialize_strv(f, "env", m->client_environment);
+
+ if (m->notify_fd >= 0) {
+ r = serialize_fd(f, fds, "notify-fd", m->notify_fd);
+ if (r < 0)
+ return r;
+
+ (void) serialize_item(f, "notify-socket", m->notify_socket);
+ }
+
+ if (m->cgroups_agent_fd >= 0) {
+ r = serialize_fd(f, fds, "cgroups-agent-fd", m->cgroups_agent_fd);
+ if (r < 0)
+ return r;
+ }
+
+ if (m->user_lookup_fds[0] >= 0) {
+ int copy0, copy1;
+
+ copy0 = fdset_put_dup(fds, m->user_lookup_fds[0]);
+ if (copy0 < 0)
+ return log_error_errno(copy0, "Failed to add user lookup fd to serialization: %m");
+
+ copy1 = fdset_put_dup(fds, m->user_lookup_fds[1]);
+ if (copy1 < 0)
+ return log_error_errno(copy1, "Failed to add user lookup fd to serialization: %m");
+
+ (void) serialize_item_format(f, "user-lookup", "%i %i", copy0, copy1);
+ }
+
+ (void) serialize_ratelimit(f, "dump-ratelimit", &m->dump_ratelimit);
+
+ bus_track_serialize(m->subscribed, f, "subscribed");
+
+ r = dynamic_user_serialize(m, f, fds);
+ if (r < 0)
+ return r;
+
+ manager_serialize_uid_refs(m, f);
+ manager_serialize_gid_refs(m, f);
+
+ r = exec_shared_runtime_serialize(m, f, fds);
+ if (r < 0)
+ return r;
+
+ r = varlink_server_serialize(m->varlink_server, f, fds);
+ if (r < 0)
+ return r;
+
+ (void) fputc('\n', f);
+
+ HASHMAP_FOREACH_KEY(u, t, m->units) {
+ if (u->id != t)
+ continue;
+
+ r = unit_serialize_state(u, f, fds, switching_root);
+ if (r < 0)
+ return r;
+ }
+
+ r = fflush_and_check(f);
+ if (r < 0)
+ return log_error_errno(r, "Failed to flush serialization: %m");
+
+ r = bus_fdset_add_all(m, fds);
+ if (r < 0)
+ return log_error_errno(r, "Failed to add bus sockets to serialization: %m");
+
+ return 0;
+}
+
+static int manager_deserialize_one_unit(Manager *m, const char *name, FILE *f, FDSet *fds) {
+ Unit *u;
+ int r;
+
+ r = manager_load_unit(m, name, NULL, NULL, &u);
+ if (r < 0) {
+ if (r == -ENOMEM)
+ return r;
+ return log_notice_errno(r, "Failed to load unit \"%s\", skipping deserialization: %m", name);
+ }
+
+ r = unit_deserialize_state(u, f, fds);
+ if (r < 0) {
+ if (r == -ENOMEM)
+ return r;
+ return log_notice_errno(r, "Failed to deserialize unit \"%s\", skipping: %m", name);
+ }
+
+ return 0;
+}
+
+static int manager_deserialize_units(Manager *m, FILE *f, FDSet *fds) {
+ int r;
+
+ for (;;) {
+ _cleanup_free_ char *line = NULL;
+
+ /* Start marker */
+ r = read_stripped_line(f, LONG_LINE_MAX, &line);
+ if (r < 0)
+ return log_error_errno(r, "Failed to read serialization line: %m");
+ if (r == 0)
+ break;
+
+ r = manager_deserialize_one_unit(m, line, f, fds);
+ if (r == -ENOMEM)
+ return r;
+ if (r < 0) {
+ r = unit_deserialize_state_skip(f);
+ if (r < 0)
+ return r;
+ }
+ }
+
+ return 0;
+}
+
+static void manager_deserialize_uid_refs_one_internal(
+ Hashmap** uid_refs,
+ const char *value) {
+
+ uid_t uid;
+ uint32_t c;
+ int r;
+
+ assert(uid_refs);
+ assert(value);
+
+ r = parse_uid(value, &uid);
+ if (r < 0 || uid == 0) {
+ log_debug("Unable to parse UID/GID reference serialization: %s", value);
+ return;
+ }
+
+ if (hashmap_ensure_allocated(uid_refs, &trivial_hash_ops) < 0) {
+ log_oom();
+ return;
+ }
+
+ c = PTR_TO_UINT32(hashmap_get(*uid_refs, UID_TO_PTR(uid)));
+ if (c & DESTROY_IPC_FLAG)
+ return;
+
+ c |= DESTROY_IPC_FLAG;
+
+ r = hashmap_replace(*uid_refs, UID_TO_PTR(uid), UINT32_TO_PTR(c));
+ if (r < 0) {
+ log_debug_errno(r, "Failed to add UID/GID reference entry: %m");
+ return;
+ }
+}
+
+static void manager_deserialize_uid_refs_one(Manager *m, const char *value) {
+ manager_deserialize_uid_refs_one_internal(&m->uid_refs, value);
+}
+
+static void manager_deserialize_gid_refs_one(Manager *m, const char *value) {
+ manager_deserialize_uid_refs_one_internal(&m->gid_refs, value);
+}
+
+int manager_deserialize(Manager *m, FILE *f, FDSet *fds) {
+ bool deserialize_varlink_sockets = false;
+ int r = 0;
+
+ assert(m);
+ assert(f);
+
+ if (DEBUG_LOGGING) {
+ if (fdset_isempty(fds))
+ log_debug("No file descriptors passed");
+ else {
+ int fd;
+
+ FDSET_FOREACH(fd, fds) {
+ _cleanup_free_ char *fn = NULL;
+
+ r = fd_get_path(fd, &fn);
+ if (r < 0)
+ log_debug_errno(r, "Received serialized fd %i %s %m",
+ fd, special_glyph(SPECIAL_GLYPH_ARROW_RIGHT));
+ else
+ log_debug("Received serialized fd %i %s %s",
+ fd, special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), strna(fn));
+ }
+ }
+ }
+
+ log_debug("Deserializing state...");
+
+ /* If we are not in reload mode yet, enter it now. Not that this is recursive, a caller might already have
+ * increased it to non-zero, which is why we just increase it by one here and down again at the end of this
+ * call. */
+ _cleanup_(manager_reloading_stopp) _unused_ Manager *reloading = manager_reloading_start(m);
+
+ for (;;) {
+ _cleanup_free_ char *l = NULL;
+ const char *val;
+
+ r = deserialize_read_line(f, &l);
+ if (r < 0)
+ return r;
+ if (r == 0) /* eof or end marker */
+ break;
+
+ if ((val = startswith(l, "current-job-id="))) {
+ uint32_t id;
+
+ if (safe_atou32(val, &id) < 0)
+ log_notice("Failed to parse current job id value '%s', ignoring.", val);
+ else
+ m->current_job_id = MAX(m->current_job_id, id);
+
+ } else if ((val = startswith(l, "n-installed-jobs="))) {
+ uint32_t n;
+
+ if (safe_atou32(val, &n) < 0)
+ log_notice("Failed to parse installed jobs counter '%s', ignoring.", val);
+ else
+ m->n_installed_jobs += n;
+
+ } else if ((val = startswith(l, "n-failed-jobs="))) {
+ uint32_t n;
+
+ if (safe_atou32(val, &n) < 0)
+ log_notice("Failed to parse failed jobs counter '%s', ignoring.", val);
+ else
+ m->n_failed_jobs += n;
+
+ } else if ((val = startswith(l, "ready-sent="))) {
+ int b;
+
+ b = parse_boolean(val);
+ if (b < 0)
+ log_notice("Failed to parse ready-sent flag '%s', ignoring.", val);
+ else
+ m->ready_sent = m->ready_sent || b;
+
+ } else if ((val = startswith(l, "taint-logged="))) {
+ int b;
+
+ b = parse_boolean(val);
+ if (b < 0)
+ log_notice("Failed to parse taint-logged flag '%s', ignoring.", val);
+ else
+ m->taint_logged = m->taint_logged || b;
+
+ } else if ((val = startswith(l, "service-watchdogs="))) {
+ int b;
+
+ b = parse_boolean(val);
+ if (b < 0)
+ log_notice("Failed to parse service-watchdogs flag '%s', ignoring.", val);
+ else
+ m->service_watchdogs = b;
+
+ } else if ((val = startswith(l, "show-status-overridden="))) {
+ ShowStatus s;
+
+ s = show_status_from_string(val);
+ if (s < 0)
+ log_notice("Failed to parse show-status-overridden flag '%s', ignoring.", val);
+ else
+ manager_override_show_status(m, s, "deserialize");
+
+ } else if ((val = startswith(l, "log-level-override="))) {
+ int level;
+
+ level = log_level_from_string(val);
+ if (level < 0)
+ log_notice("Failed to parse log-level-override value '%s', ignoring.", val);
+ else
+ manager_override_log_level(m, level);
+
+ } else if ((val = startswith(l, "log-target-override="))) {
+ LogTarget target;
+
+ target = log_target_from_string(val);
+ if (target < 0)
+ log_notice("Failed to parse log-target-override value '%s', ignoring.", val);
+ else
+ manager_override_log_target(m, target);
+
+ } else if ((val = startswith(l, "runtime-watchdog-overridden="))) {
+ usec_t t;
+
+ if (deserialize_usec(val, &t) < 0)
+ log_notice("Failed to parse runtime-watchdog-overridden value '%s', ignoring.", val);
+ else
+ manager_override_watchdog(m, WATCHDOG_RUNTIME, t);
+
+ } else if ((val = startswith(l, "reboot-watchdog-overridden="))) {
+ usec_t t;
+
+ if (deserialize_usec(val, &t) < 0)
+ log_notice("Failed to parse reboot-watchdog-overridden value '%s', ignoring.", val);
+ else
+ manager_override_watchdog(m, WATCHDOG_REBOOT, t);
+
+ } else if ((val = startswith(l, "kexec-watchdog-overridden="))) {
+ usec_t t;
+
+ if (deserialize_usec(val, &t) < 0)
+ log_notice("Failed to parse kexec-watchdog-overridden value '%s', ignoring.", val);
+ else
+ manager_override_watchdog(m, WATCHDOG_KEXEC, t);
+
+ } else if ((val = startswith(l, "pretimeout-watchdog-overridden="))) {
+ usec_t t;
+
+ if (deserialize_usec(val, &t) < 0)
+ log_notice("Failed to parse pretimeout-watchdog-overridden value '%s', ignoring.", val);
+ else
+ manager_override_watchdog(m, WATCHDOG_PRETIMEOUT, t);
+
+ } else if ((val = startswith(l, "pretimeout-watchdog-governor-overridden="))) {
+ r = free_and_strdup(&m->watchdog_pretimeout_governor_overridden, val);
+ if (r < 0)
+ return r;
+
+ } else if (startswith(l, "env=")) {
+ r = deserialize_environment(l + 4, &m->client_environment);
+ if (r < 0)
+ log_notice_errno(r, "Failed to parse environment entry: \"%s\", ignoring: %m", l);
+
+ } else if ((val = startswith(l, "notify-fd="))) {
+ int fd;
+
+ fd = deserialize_fd(fds, val);
+ if (fd >= 0) {
+ m->notify_event_source = sd_event_source_disable_unref(m->notify_event_source);
+ safe_close(m->notify_fd);
+ m->notify_fd = fd;
+ }
+
+ } else if ((val = startswith(l, "notify-socket="))) {
+ r = free_and_strdup(&m->notify_socket, val);
+ if (r < 0)
+ return r;
+
+ } else if ((val = startswith(l, "cgroups-agent-fd="))) {
+ int fd;
+
+ fd = deserialize_fd(fds, val);
+ if (fd >= 0) {
+ m->cgroups_agent_event_source = sd_event_source_disable_unref(m->cgroups_agent_event_source);
+ safe_close(m->cgroups_agent_fd);
+ m->cgroups_agent_fd = fd;
+ }
+
+ } else if ((val = startswith(l, "user-lookup="))) {
+ int fd0, fd1;
+
+ if (sscanf(val, "%i %i", &fd0, &fd1) != 2 || fd0 < 0 || fd1 < 0 || fd0 == fd1 || !fdset_contains(fds, fd0) || !fdset_contains(fds, fd1))
+ log_notice("Failed to parse user lookup fd, ignoring: %s", val);
+ else {
+ m->user_lookup_event_source = sd_event_source_disable_unref(m->user_lookup_event_source);
+ safe_close_pair(m->user_lookup_fds);
+ m->user_lookup_fds[0] = fdset_remove(fds, fd0);
+ m->user_lookup_fds[1] = fdset_remove(fds, fd1);
+ }
+
+ } else if ((val = startswith(l, "dynamic-user=")))
+ dynamic_user_deserialize_one(m, val, fds, NULL);
+ else if ((val = startswith(l, "destroy-ipc-uid=")))
+ manager_deserialize_uid_refs_one(m, val);
+ else if ((val = startswith(l, "destroy-ipc-gid=")))
+ manager_deserialize_gid_refs_one(m, val);
+ else if ((val = startswith(l, "exec-runtime=")))
+ (void) exec_shared_runtime_deserialize_one(m, val, fds);
+ else if ((val = startswith(l, "subscribed="))) {
+
+ if (strv_extend(&m->deserialized_subscribed, val) < 0)
+ return -ENOMEM;
+ } else if ((val = startswith(l, "varlink-server-socket-address="))) {
+ if (!m->varlink_server && MANAGER_IS_SYSTEM(m)) {
+ r = manager_varlink_init(m);
+ if (r < 0) {
+ log_warning_errno(r, "Failed to setup varlink server, ignoring: %m");
+ continue;
+ }
+
+ deserialize_varlink_sockets = true;
+ }
+
+ /* To avoid unnecessary deserialization (i.e. during reload vs. reexec) we only deserialize
+ * the FDs if we had to create a new m->varlink_server. The deserialize_varlink_sockets flag
+ * is initialized outside of the loop, is flipped after the VarlinkServer is setup, and
+ * remains set until all serialized contents are handled. */
+ if (deserialize_varlink_sockets)
+ (void) varlink_server_deserialize_one(m->varlink_server, val, fds);
+ } else if ((val = startswith(l, "dump-ratelimit=")))
+ deserialize_ratelimit(&m->dump_ratelimit, "dump-ratelimit", val);
+ else {
+ ManagerTimestamp q;
+
+ for (q = 0; q < _MANAGER_TIMESTAMP_MAX; q++) {
+ val = startswith(l, manager_timestamp_to_string(q));
+ if (!val)
+ continue;
+
+ val = startswith(val, "-timestamp=");
+ if (val)
+ break;
+ }
+
+ if (q < _MANAGER_TIMESTAMP_MAX) /* found it */
+ (void) deserialize_dual_timestamp(val, m->timestamps + q);
+ else if (!STARTSWITH_SET(l, "kdbus-fd=", "honor-device-enumeration=")) /* ignore deprecated values */
+ log_notice("Unknown serialization item '%s', ignoring.", l);
+ }
+ }
+
+ return manager_deserialize_units(m, f, fds);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-18 19:25:00 +0000