| /* SPDX-License-Identifier: LGPL-2.1+ */ |
| |
| #if HAVE_SELINUX |
| #include <selinux/selinux.h> |
| #endif |
| #include <sys/ioctl.h> |
| #include <sys/mman.h> |
| #include <sys/signalfd.h> |
| #include <sys/statvfs.h> |
| #include <linux/sockios.h> |
| |
| #include "libudev.h" |
| #include "sd-daemon.h" |
| #include "sd-journal.h" |
| #include "sd-messages.h" |
| |
| #include "acl-util.h" |
| #include "alloc-util.h" |
| #include "audit-util.h" |
| #include "cgroup-util.h" |
| #include "conf-parser.h" |
| #include "dirent-util.h" |
| #include "extract-word.h" |
| #include "fd-util.h" |
| #include "fileio.h" |
| #include "format-util.h" |
| #include "fs-util.h" |
| #include "hashmap.h" |
| #include "hostname-util.h" |
| #include "id128-util.h" |
| #include "io-util.h" |
| #include "journal-authenticate.h" |
| #include "journal-file.h" |
| #include "journal-internal.h" |
| #include "journal-vacuum.h" |
| #include "journald-audit.h" |
| #include "journald-context.h" |
| #include "journald-kmsg.h" |
| #include "journald-native.h" |
| #include "journald-rate-limit.h" |
| #include "journald-server.h" |
| #include "journald-stream.h" |
| #include "journald-syslog.h" |
| #include "log.h" |
| #include "missing.h" |
| #include "mkdir.h" |
| #include "parse-util.h" |
| #include "proc-cmdline.h" |
| #include "process-util.h" |
| #include "rm-rf.h" |
| #include "selinux-util.h" |
| #include "signal-util.h" |
| #include "socket-util.h" |
| #include "stdio-util.h" |
| #include "string-table.h" |
| #include "string-util.h" |
| #include "syslog-util.h" |
| #include "user-util.h" |
| |
| #define USER_JOURNALS_MAX 1024 |
| |
| #define DEFAULT_SYNC_INTERVAL_USEC (5*USEC_PER_MINUTE) |
| #define DEFAULT_RATE_LIMIT_INTERVAL (30*USEC_PER_SEC) |
| #define DEFAULT_RATE_LIMIT_BURST 10000 |
| #define DEFAULT_MAX_FILE_USEC USEC_PER_MONTH |
| |
| #define RECHECK_SPACE_USEC (30*USEC_PER_SEC) |
| |
| #define NOTIFY_SNDBUF_SIZE (8*1024*1024) |
| |
| /* The period to insert between posting changes for coalescing */ |
| #define POST_CHANGE_TIMER_INTERVAL_USEC (250*USEC_PER_MSEC) |
| |
| /* Pick a good default that is likely to fit into AF_UNIX and AF_INET SOCK_DGRAM datagrams, and even leaves some room |
| * for a bit of additional metadata. */ |
| #define DEFAULT_LINE_MAX (48*1024) |
| |
| static int determine_path_usage(Server *s, const char *path, uint64_t *ret_used, uint64_t *ret_free) { |
| _cleanup_closedir_ DIR *d = NULL; |
| struct dirent *de; |
| struct statvfs ss; |
| |
| assert(ret_used); |
| assert(ret_free); |
| |
| d = opendir(path); |
| if (!d) |
| return log_full_errno(errno == ENOENT ? LOG_DEBUG : LOG_ERR, |
| errno, "Failed to open %s: %m", path); |
| |
| if (fstatvfs(dirfd(d), &ss) < 0) |
| return log_error_errno(errno, "Failed to fstatvfs(%s): %m", path); |
| |
| *ret_free = ss.f_bsize * ss.f_bavail; |
| *ret_used = 0; |
| FOREACH_DIRENT_ALL(de, d, break) { |
| struct stat st; |
| |
| if (!endswith(de->d_name, ".journal") && |
| !endswith(de->d_name, ".journal~")) |
| continue; |
| |
| if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) { |
| log_debug_errno(errno, "Failed to stat %s/%s, ignoring: %m", path, de->d_name); |
| continue; |
| } |
| |
| if (!S_ISREG(st.st_mode)) |
| continue; |
| |
| *ret_used += (uint64_t) st.st_blocks * 512UL; |
| } |
| |
| return 0; |
| } |
| |
| static void cache_space_invalidate(JournalStorageSpace *space) { |
| zero(*space); |
| } |
| |
| static int cache_space_refresh(Server *s, JournalStorage *storage) { |
| JournalStorageSpace *space; |
| JournalMetrics *metrics; |
| uint64_t vfs_used, vfs_avail, avail; |
| usec_t ts; |
| int r; |
| |
| assert(s); |
| |
| metrics = &storage->metrics; |
| space = &storage->space; |
| |
| ts = now(CLOCK_MONOTONIC); |
| |
| if (space->timestamp != 0 && space->timestamp + RECHECK_SPACE_USEC > ts) |
| return 0; |
| |
| r = determine_path_usage(s, storage->path, &vfs_used, &vfs_avail); |
| if (r < 0) |
| return r; |
| |
| space->vfs_used = vfs_used; |
| space->vfs_available = vfs_avail; |
| |
| avail = LESS_BY(vfs_avail, metrics->keep_free); |
| |
| space->limit = MIN(MAX(vfs_used + avail, metrics->min_use), metrics->max_use); |
| space->available = LESS_BY(space->limit, vfs_used); |
| space->timestamp = ts; |
| return 1; |
| } |
| |
| static void patch_min_use(JournalStorage *storage) { |
| assert(storage); |
| |
| /* Let's bump the min_use limit to the current usage on disk. We do |
| * this when starting up and first opening the journal files. This way |
| * sudden spikes in disk usage will not cause journald to vacuum files |
| * without bounds. Note that this means that only a restart of journald |
| * will make it reset this value. */ |
| |
| storage->metrics.min_use = MAX(storage->metrics.min_use, storage->space.vfs_used); |
| } |
| |
| static int determine_space(Server *s, uint64_t *available, uint64_t *limit) { |
| JournalStorage *js; |
| int r; |
| |
| assert(s); |
| |
| js = s->system_journal ? &s->system_storage : &s->runtime_storage; |
| |
| r = cache_space_refresh(s, js); |
| if (r >= 0) { |
| if (available) |
| *available = js->space.available; |
| if (limit) |
| *limit = js->space.limit; |
| } |
| return r; |
| } |
| |
| void server_space_usage_message(Server *s, JournalStorage *storage) { |
| char fb1[FORMAT_BYTES_MAX], fb2[FORMAT_BYTES_MAX], fb3[FORMAT_BYTES_MAX], |
| fb4[FORMAT_BYTES_MAX], fb5[FORMAT_BYTES_MAX], fb6[FORMAT_BYTES_MAX]; |
| JournalMetrics *metrics; |
| |
| assert(s); |
| |
| if (!storage) |
| storage = s->system_journal ? &s->system_storage : &s->runtime_storage; |
| |
| if (cache_space_refresh(s, storage) < 0) |
| return; |
| |
| metrics = &storage->metrics; |
| format_bytes(fb1, sizeof(fb1), storage->space.vfs_used); |
| format_bytes(fb2, sizeof(fb2), metrics->max_use); |
| format_bytes(fb3, sizeof(fb3), metrics->keep_free); |
| format_bytes(fb4, sizeof(fb4), storage->space.vfs_available); |
| format_bytes(fb5, sizeof(fb5), storage->space.limit); |
| format_bytes(fb6, sizeof(fb6), storage->space.available); |
| |
| server_driver_message(s, 0, |
| "MESSAGE_ID=" SD_MESSAGE_JOURNAL_USAGE_STR, |
| LOG_MESSAGE("%s (%s) is %s, max %s, %s free.", |
| storage->name, storage->path, fb1, fb5, fb6), |
| "JOURNAL_NAME=%s", storage->name, |
| "JOURNAL_PATH=%s", storage->path, |
| "CURRENT_USE=%"PRIu64, storage->space.vfs_used, |
| "CURRENT_USE_PRETTY=%s", fb1, |
| "MAX_USE=%"PRIu64, metrics->max_use, |
| "MAX_USE_PRETTY=%s", fb2, |
| "DISK_KEEP_FREE=%"PRIu64, metrics->keep_free, |
| "DISK_KEEP_FREE_PRETTY=%s", fb3, |
| "DISK_AVAILABLE=%"PRIu64, storage->space.vfs_available, |
| "DISK_AVAILABLE_PRETTY=%s", fb4, |
| "LIMIT=%"PRIu64, storage->space.limit, |
| "LIMIT_PRETTY=%s", fb5, |
| "AVAILABLE=%"PRIu64, storage->space.available, |
| "AVAILABLE_PRETTY=%s", fb6, |
| NULL); |
| } |
| |
| static bool uid_for_system_journal(uid_t uid) { |
| |
| /* Returns true if the specified UID shall get its data stored in the system journal*/ |
| |
| return uid_is_system(uid) || uid_is_dynamic(uid) || uid == UID_NOBODY; |
| } |
| |
| static void server_add_acls(JournalFile *f, uid_t uid) { |
| #if HAVE_ACL |
| int r; |
| #endif |
| assert(f); |
| |
| #if HAVE_ACL |
| if (uid_for_system_journal(uid)) |
| return; |
| |
| r = add_acls_for_user(f->fd, uid); |
| if (r < 0) |
| log_warning_errno(r, "Failed to set ACL on %s, ignoring: %m", f->path); |
| #endif |
| } |
| |
| static int open_journal( |
| Server *s, |
| bool reliably, |
| const char *fname, |
| int flags, |
| bool seal, |
| JournalMetrics *metrics, |
| JournalFile **ret) { |
| int r; |
| JournalFile *f; |
| |
| assert(s); |
| assert(fname); |
| assert(ret); |
| |
| if (reliably) |
| r = journal_file_open_reliably(fname, flags, 0640, s->compress.enabled, s->compress.threshold_bytes, |
| seal, metrics, s->mmap, s->deferred_closes, NULL, &f); |
| else |
| r = journal_file_open(-1, fname, flags, 0640, s->compress.enabled, s->compress.threshold_bytes, seal, |
| metrics, s->mmap, s->deferred_closes, NULL, &f); |
| |
| if (r < 0) |
| return r; |
| |
| r = journal_file_enable_post_change_timer(f, s->event, POST_CHANGE_TIMER_INTERVAL_USEC); |
| if (r < 0) { |
| (void) journal_file_close(f); |
| return r; |
| } |
| |
| *ret = f; |
| return r; |
| } |
| |
| static bool flushed_flag_is_set(void) { |
| return access("/run/systemd/journal/flushed", F_OK) >= 0; |
| } |
| |
| static int system_journal_open(Server *s, bool flush_requested) { |
| const char *fn; |
| int r = 0; |
| |
| if (!s->system_journal && |
| IN_SET(s->storage, STORAGE_PERSISTENT, STORAGE_AUTO) && |
| (flush_requested || flushed_flag_is_set())) { |
| |
| /* If in auto mode: first try to create the machine |
| * path, but not the prefix. |
| * |
| * If in persistent mode: create /var/log/journal and |
| * the machine path */ |
| |
| if (s->storage == STORAGE_PERSISTENT) |
| (void) mkdir_p("/var/log/journal/", 0755); |
| |
| (void) mkdir(s->system_storage.path, 0755); |
| |
| fn = strjoina(s->system_storage.path, "/system.journal"); |
| r = open_journal(s, true, fn, O_RDWR|O_CREAT, s->seal, &s->system_storage.metrics, &s->system_journal); |
| if (r >= 0) { |
| server_add_acls(s->system_journal, 0); |
| (void) cache_space_refresh(s, &s->system_storage); |
| patch_min_use(&s->system_storage); |
| } else if (r < 0) { |
| if (!IN_SET(r, -ENOENT, -EROFS)) |
| log_warning_errno(r, "Failed to open system journal: %m"); |
| |
| r = 0; |
| } |
| |
| /* If the runtime journal is open, and we're post-flush, we're |
| * recovering from a failed system journal rotate (ENOSPC) |
| * for which the runtime journal was reopened. |
| * |
| * Perform an implicit flush to var, leaving the runtime |
| * journal closed, now that the system journal is back. |
| */ |
| if (!flush_requested) |
| (void) server_flush_to_var(s, true); |
| } |
| |
| if (!s->runtime_journal && |
| (s->storage != STORAGE_NONE)) { |
| |
| fn = strjoina(s->runtime_storage.path, "/system.journal"); |
| |
| if (s->system_journal) { |
| |
| /* Try to open the runtime journal, but only |
| * if it already exists, so that we can flush |
| * it into the system journal */ |
| |
| r = open_journal(s, false, fn, O_RDWR, false, &s->runtime_storage.metrics, &s->runtime_journal); |
| if (r < 0) { |
| if (r != -ENOENT) |
| log_warning_errno(r, "Failed to open runtime journal: %m"); |
| |
| r = 0; |
| } |
| |
| } else { |
| |
| /* OK, we really need the runtime journal, so create |
| * it if necessary. */ |
| |
| (void) mkdir("/run/log", 0755); |
| (void) mkdir("/run/log/journal", 0755); |
| (void) mkdir_parents(fn, 0750); |
| |
| r = open_journal(s, true, fn, O_RDWR|O_CREAT, false, &s->runtime_storage.metrics, &s->runtime_journal); |
| if (r < 0) |
| return log_error_errno(r, "Failed to open runtime journal: %m"); |
| } |
| |
| if (s->runtime_journal) { |
| server_add_acls(s->runtime_journal, 0); |
| (void) cache_space_refresh(s, &s->runtime_storage); |
| patch_min_use(&s->runtime_storage); |
| } |
| } |
| |
| return r; |
| } |
| |
| static JournalFile* find_journal(Server *s, uid_t uid) { |
| _cleanup_free_ char *p = NULL; |
| int r; |
| JournalFile *f; |
| sd_id128_t machine; |
| |
| assert(s); |
| |
| /* A rotate that fails to create the new journal (ENOSPC) leaves the |
| * rotated journal as NULL. Unless we revisit opening, even after |
| * space is made available we'll continue to return NULL indefinitely. |
| * |
| * system_journal_open() is a noop if the journals are already open, so |
| * we can just call it here to recover from failed rotates (or anything |
| * else that's left the journals as NULL). |
| * |
| * Fixes https://github.com/systemd/systemd/issues/3968 */ |
| (void) system_journal_open(s, false); |
| |
| /* We split up user logs only on /var, not on /run. If the |
| * runtime file is open, we write to it exclusively, in order |
| * to guarantee proper order as soon as we flush /run to |
| * /var and close the runtime file. */ |
| |
| if (s->runtime_journal) |
| return s->runtime_journal; |
| |
| if (uid_for_system_journal(uid)) |
| return s->system_journal; |
| |
| r = sd_id128_get_machine(&machine); |
| if (r < 0) |
| return s->system_journal; |
| |
| f = ordered_hashmap_get(s->user_journals, UID_TO_PTR(uid)); |
| if (f) |
| return f; |
| |
| if (asprintf(&p, "/var/log/journal/" SD_ID128_FORMAT_STR "/user-"UID_FMT".journal", |
| SD_ID128_FORMAT_VAL(machine), uid) < 0) |
| return s->system_journal; |
| |
| while (ordered_hashmap_size(s->user_journals) >= USER_JOURNALS_MAX) { |
| /* Too many open? Then let's close one */ |
| f = ordered_hashmap_steal_first(s->user_journals); |
| assert(f); |
| (void) journal_file_close(f); |
| } |
| |
| r = open_journal(s, true, p, O_RDWR|O_CREAT, s->seal, &s->system_storage.metrics, &f); |
| if (r < 0) |
| return s->system_journal; |
| |
| server_add_acls(f, uid); |
| |
| r = ordered_hashmap_put(s->user_journals, UID_TO_PTR(uid), f); |
| if (r < 0) { |
| (void) journal_file_close(f); |
| return s->system_journal; |
| } |
| |
| return f; |
| } |
| |
| static int do_rotate( |
| Server *s, |
| JournalFile **f, |
| const char* name, |
| bool seal, |
| uint32_t uid) { |
| |
| int r; |
| assert(s); |
| |
| if (!*f) |
| return -EINVAL; |
| |
| r = journal_file_rotate(f, s->compress.enabled, s->compress.threshold_bytes, seal, s->deferred_closes); |
| if (r < 0) { |
| if (*f) |
| return log_error_errno(r, "Failed to rotate %s: %m", (*f)->path); |
| else |
| return log_error_errno(r, "Failed to create new %s journal: %m", name); |
| } |
| |
| server_add_acls(*f, uid); |
| |
| return r; |
| } |
| |
| void server_rotate(Server *s) { |
| JournalFile *f; |
| void *k; |
| Iterator i; |
| int r; |
| |
| log_debug("Rotating..."); |
| |
| (void) do_rotate(s, &s->runtime_journal, "runtime", false, 0); |
| (void) do_rotate(s, &s->system_journal, "system", s->seal, 0); |
| |
| ORDERED_HASHMAP_FOREACH_KEY(f, k, s->user_journals, i) { |
| r = do_rotate(s, &f, "user", s->seal, PTR_TO_UID(k)); |
| if (r >= 0) |
| ordered_hashmap_replace(s->user_journals, k, f); |
| else if (!f) |
| /* Old file has been closed and deallocated */ |
| ordered_hashmap_remove(s->user_journals, k); |
| } |
| |
| /* Perform any deferred closes which aren't still offlining. */ |
| SET_FOREACH(f, s->deferred_closes, i) |
| if (!journal_file_is_offlining(f)) { |
| (void) set_remove(s->deferred_closes, f); |
| (void) journal_file_close(f); |
| } |
| } |
| |
| void server_sync(Server *s) { |
| JournalFile *f; |
| Iterator i; |
| int r; |
| |
| if (s->system_journal) { |
| r = journal_file_set_offline(s->system_journal, false); |
| if (r < 0) |
| log_warning_errno(r, "Failed to sync system journal, ignoring: %m"); |
| } |
| |
| ORDERED_HASHMAP_FOREACH(f, s->user_journals, i) { |
| r = journal_file_set_offline(f, false); |
| if (r < 0) |
| log_warning_errno(r, "Failed to sync user journal, ignoring: %m"); |
| } |
| |
| if (s->sync_event_source) { |
| r = sd_event_source_set_enabled(s->sync_event_source, SD_EVENT_OFF); |
| if (r < 0) |
| log_error_errno(r, "Failed to disable sync timer source: %m"); |
| } |
| |
| s->sync_scheduled = false; |
| } |
| |
| static void do_vacuum(Server *s, JournalStorage *storage, bool verbose) { |
| |
| int r; |
| |
| assert(s); |
| assert(storage); |
| |
| (void) cache_space_refresh(s, storage); |
| |
| if (verbose) |
| server_space_usage_message(s, storage); |
| |
| r = journal_directory_vacuum(storage->path, storage->space.limit, |
| storage->metrics.n_max_files, s->max_retention_usec, |
| &s->oldest_file_usec, verbose); |
| if (r < 0 && r != -ENOENT) |
| log_warning_errno(r, "Failed to vacuum %s, ignoring: %m", storage->path); |
| |
| cache_space_invalidate(&storage->space); |
| } |
| |
| int server_vacuum(Server *s, bool verbose) { |
| assert(s); |
| |
| log_debug("Vacuuming..."); |
| |
| s->oldest_file_usec = 0; |
| |
| if (s->system_journal) |
| do_vacuum(s, &s->system_storage, verbose); |
| if (s->runtime_journal) |
| do_vacuum(s, &s->runtime_storage, verbose); |
| |
| return 0; |
| } |
| |
| static void server_cache_machine_id(Server *s) { |
| sd_id128_t id; |
| int r; |
| |
| assert(s); |
| |
| r = sd_id128_get_machine(&id); |
| if (r < 0) |
| return; |
| |
| sd_id128_to_string(id, stpcpy(s->machine_id_field, "_MACHINE_ID=")); |
| } |
| |
| static void server_cache_boot_id(Server *s) { |
| sd_id128_t id; |
| int r; |
| |
| assert(s); |
| |
| r = sd_id128_get_boot(&id); |
| if (r < 0) |
| return; |
| |
| sd_id128_to_string(id, stpcpy(s->boot_id_field, "_BOOT_ID=")); |
| } |
| |
| static void server_cache_hostname(Server *s) { |
| _cleanup_free_ char *t = NULL; |
| char *x; |
| |
| assert(s); |
| |
| t = gethostname_malloc(); |
| if (!t) |
| return; |
| |
| x = strappend("_HOSTNAME=", t); |
| if (!x) |
| return; |
| |
| free(s->hostname_field); |
| s->hostname_field = x; |
| } |
| |
| static bool shall_try_append_again(JournalFile *f, int r) { |
| switch(r) { |
| |
| case -E2BIG: /* Hit configured limit */ |
| case -EFBIG: /* Hit fs limit */ |
| case -EDQUOT: /* Quota limit hit */ |
| case -ENOSPC: /* Disk full */ |
| log_debug("%s: Allocation limit reached, rotating.", f->path); |
| return true; |
| |
| case -EIO: /* I/O error of some kind (mmap) */ |
| log_warning("%s: IO error, rotating.", f->path); |
| return true; |
| |
| case -EHOSTDOWN: /* Other machine */ |
| log_info("%s: Journal file from other machine, rotating.", f->path); |
| return true; |
| |
| case -EBUSY: /* Unclean shutdown */ |
| log_info("%s: Unclean shutdown, rotating.", f->path); |
| return true; |
| |
| case -EPROTONOSUPPORT: /* Unsupported feature */ |
| log_info("%s: Unsupported feature, rotating.", f->path); |
| return true; |
| |
| case -EBADMSG: /* Corrupted */ |
| case -ENODATA: /* Truncated */ |
| case -ESHUTDOWN: /* Already archived */ |
| log_warning("%s: Journal file corrupted, rotating.", f->path); |
| return true; |
| |
| case -EIDRM: /* Journal file has been deleted */ |
| log_warning("%s: Journal file has been deleted, rotating.", f->path); |
| return true; |
| |
| case -ETXTBSY: /* Journal file is from the future */ |
| log_warning("%s: Journal file is from the future, rotating.", f->path); |
| return true; |
| |
| default: |
| return false; |
| } |
| } |
| |
| static void write_to_journal(Server *s, uid_t uid, struct iovec *iovec, size_t n, int priority) { |
| bool vacuumed = false, rotate = false; |
| struct dual_timestamp ts; |
| JournalFile *f; |
| int r; |
| |
| assert(s); |
| assert(iovec); |
| assert(n > 0); |
| |
| /* Get the closest, linearized time we have for this log event from the event loop. (Note that we do not use |
| * the source time, and not even the time the event was originally seen, but instead simply the time we started |
| * processing it, as we want strictly linear ordering in what we write out.) */ |
| assert_se(sd_event_now(s->event, CLOCK_REALTIME, &ts.realtime) >= 0); |
| assert_se(sd_event_now(s->event, CLOCK_MONOTONIC, &ts.monotonic) >= 0); |
| |
| if (ts.realtime < s->last_realtime_clock) { |
| /* When the time jumps backwards, let's immediately rotate. Of course, this should not happen during |
| * regular operation. However, when it does happen, then we should make sure that we start fresh files |
| * to ensure that the entries in the journal files are strictly ordered by time, in order to ensure |
| * bisection works correctly. */ |
| |
| log_debug("Time jumped backwards, rotating."); |
| rotate = true; |
| } else { |
| |
| f = find_journal(s, uid); |
| if (!f) |
| return; |
| |
| if (journal_file_rotate_suggested(f, s->max_file_usec)) { |
| log_debug("%s: Journal header limits reached or header out-of-date, rotating.", f->path); |
| rotate = true; |
| } |
| } |
| |
| if (rotate) { |
| server_rotate(s); |
| server_vacuum(s, false); |
| vacuumed = true; |
| |
| f = find_journal(s, uid); |
| if (!f) |
| return; |
| } |
| |
| s->last_realtime_clock = ts.realtime; |
| |
| r = journal_file_append_entry(f, &ts, NULL, iovec, n, &s->seqnum, NULL, NULL); |
| if (r >= 0) { |
| server_schedule_sync(s, priority); |
| return; |
| } |
| |
| if (vacuumed || !shall_try_append_again(f, r)) { |
| log_error_errno(r, "Failed to write entry (%zu items, %zu bytes), ignoring: %m", n, IOVEC_TOTAL_SIZE(iovec, n)); |
| return; |
| } |
| |
| server_rotate(s); |
| server_vacuum(s, false); |
| |
| f = find_journal(s, uid); |
| if (!f) |
| return; |
| |
| log_debug("Retrying write."); |
| r = journal_file_append_entry(f, &ts, NULL, iovec, n, &s->seqnum, NULL, NULL); |
| if (r < 0) |
| log_error_errno(r, "Failed to write entry (%zu items, %zu bytes) despite vacuuming, ignoring: %m", n, IOVEC_TOTAL_SIZE(iovec, n)); |
| else |
| server_schedule_sync(s, priority); |
| } |
| |
| #define IOVEC_ADD_NUMERIC_FIELD(iovec, n, value, type, isset, format, field) \ |
| if (isset(value)) { \ |
| char *k; \ |
| k = newa(char, STRLEN(field "=") + DECIMAL_STR_MAX(type) + 1); \ |
| sprintf(k, field "=" format, value); \ |
| iovec[n++] = IOVEC_MAKE_STRING(k); \ |
| } |
| |
| #define IOVEC_ADD_STRING_FIELD(iovec, n, value, field) \ |
| if (!isempty(value)) { \ |
| char *k; \ |
| k = strjoina(field "=", value); \ |
| iovec[n++] = IOVEC_MAKE_STRING(k); \ |
| } |
| |
| #define IOVEC_ADD_ID128_FIELD(iovec, n, value, field) \ |
| if (!sd_id128_is_null(value)) { \ |
| char *k; \ |
| k = newa(char, STRLEN(field "=") + SD_ID128_STRING_MAX); \ |
| sd_id128_to_string(value, stpcpy(k, field "=")); \ |
| iovec[n++] = IOVEC_MAKE_STRING(k); \ |
| } |
| |
| #define IOVEC_ADD_SIZED_FIELD(iovec, n, value, value_size, field) \ |
| if (value_size > 0) { \ |
| char *k; \ |
| k = newa(char, STRLEN(field "=") + value_size + 1); \ |
| *((char*) mempcpy(stpcpy(k, field "="), value, value_size)) = 0; \ |
| iovec[n++] = IOVEC_MAKE_STRING(k); \ |
| } \ |
| |
| static void dispatch_message_real( |
| Server *s, |
| struct iovec *iovec, size_t n, size_t m, |
| const ClientContext *c, |
| const struct timeval *tv, |
| int priority, |
| pid_t object_pid) { |
| |
| char source_time[sizeof("_SOURCE_REALTIME_TIMESTAMP=") + DECIMAL_STR_MAX(usec_t)]; |
| _cleanup_free_ char *cmdline1 = NULL, *cmdline2 = NULL; |
| uid_t journal_uid; |
| ClientContext *o; |
| |
| assert(s); |
| assert(iovec); |
| assert(n > 0); |
| assert(n + |
| N_IOVEC_META_FIELDS + |
| (pid_is_valid(object_pid) ? N_IOVEC_OBJECT_FIELDS : 0) + |
| client_context_extra_fields_n_iovec(c) <= m); |
| |
| if (c) { |
| IOVEC_ADD_NUMERIC_FIELD(iovec, n, c->pid, pid_t, pid_is_valid, PID_FMT, "_PID"); |
| IOVEC_ADD_NUMERIC_FIELD(iovec, n, c->uid, uid_t, uid_is_valid, UID_FMT, "_UID"); |
| IOVEC_ADD_NUMERIC_FIELD(iovec, n, c->gid, gid_t, gid_is_valid, GID_FMT, "_GID"); |
| |
| IOVEC_ADD_STRING_FIELD(iovec, n, c->comm, "_COMM"); /* At most TASK_COMM_LENGTH (16 bytes) */ |
| IOVEC_ADD_STRING_FIELD(iovec, n, c->exe, "_EXE"); /* A path, so at most PATH_MAX (4096 bytes) */ |
| |
| if (c->cmdline) |
| /* At most _SC_ARG_MAX (2MB usually), which is too much to put on stack. |
| * Let's use a heap allocation for this one. */ |
| cmdline1 = set_iovec_string_field(iovec, &n, "_CMDLINE=", c->cmdline); |
| |
| IOVEC_ADD_STRING_FIELD(iovec, n, c->capeff, "_CAP_EFFECTIVE"); /* Read from /proc/.../status */ |
| IOVEC_ADD_SIZED_FIELD(iovec, n, c->label, c->label_size, "_SELINUX_CONTEXT"); |
| IOVEC_ADD_NUMERIC_FIELD(iovec, n, c->auditid, uint32_t, audit_session_is_valid, "%" PRIu32, "_AUDIT_SESSION"); |
| IOVEC_ADD_NUMERIC_FIELD(iovec, n, c->loginuid, uid_t, uid_is_valid, UID_FMT, "_AUDIT_LOGINUID"); |
| |
| IOVEC_ADD_STRING_FIELD(iovec, n, c->cgroup, "_SYSTEMD_CGROUP"); /* A path */ |
| IOVEC_ADD_STRING_FIELD(iovec, n, c->session, "_SYSTEMD_SESSION"); |
| IOVEC_ADD_NUMERIC_FIELD(iovec, n, c->owner_uid, uid_t, uid_is_valid, UID_FMT, "_SYSTEMD_OWNER_UID"); |
| IOVEC_ADD_STRING_FIELD(iovec, n, c->unit, "_SYSTEMD_UNIT"); /* Unit names are bounded by UNIT_NAME_MAX */ |
| IOVEC_ADD_STRING_FIELD(iovec, n, c->user_unit, "_SYSTEMD_USER_UNIT"); |
| IOVEC_ADD_STRING_FIELD(iovec, n, c->slice, "_SYSTEMD_SLICE"); |
| IOVEC_ADD_STRING_FIELD(iovec, n, c->user_slice, "_SYSTEMD_USER_SLICE"); |
| |
| IOVEC_ADD_ID128_FIELD(iovec, n, c->invocation_id, "_SYSTEMD_INVOCATION_ID"); |
| |
| if (c->extra_fields_n_iovec > 0) { |
| memcpy(iovec + n, c->extra_fields_iovec, c->extra_fields_n_iovec * sizeof(struct iovec)); |
| n += c->extra_fields_n_iovec; |
| } |
| } |
| |
| assert(n <= m); |
| |
| if (pid_is_valid(object_pid) && client_context_get(s, object_pid, NULL, NULL, 0, NULL, &o) >= 0) { |
| |
| IOVEC_ADD_NUMERIC_FIELD(iovec, n, o->pid, pid_t, pid_is_valid, PID_FMT, "OBJECT_PID"); |
| IOVEC_ADD_NUMERIC_FIELD(iovec, n, o->uid, uid_t, uid_is_valid, UID_FMT, "OBJECT_UID"); |
| IOVEC_ADD_NUMERIC_FIELD(iovec, n, o->gid, gid_t, gid_is_valid, GID_FMT, "OBJECT_GID"); |
| |
| /* See above for size limits, only ->cmdline may be large, so use a heap allocation for it. */ |
| IOVEC_ADD_STRING_FIELD(iovec, n, o->comm, "OBJECT_COMM"); |
| IOVEC_ADD_STRING_FIELD(iovec, n, o->exe, "OBJECT_EXE"); |
| if (o->cmdline) |
| cmdline2 = set_iovec_string_field(iovec, &n, "OBJECT_CMDLINE=", o->cmdline); |
| |
| IOVEC_ADD_STRING_FIELD(iovec, n, o->capeff, "OBJECT_CAP_EFFECTIVE"); |
| IOVEC_ADD_SIZED_FIELD(iovec, n, o->label, o->label_size, "OBJECT_SELINUX_CONTEXT"); |
| IOVEC_ADD_NUMERIC_FIELD(iovec, n, o->auditid, uint32_t, audit_session_is_valid, "%" PRIu32, "OBJECT_AUDIT_SESSION"); |
| IOVEC_ADD_NUMERIC_FIELD(iovec, n, o->loginuid, uid_t, uid_is_valid, UID_FMT, "OBJECT_AUDIT_LOGINUID"); |
| |
| IOVEC_ADD_STRING_FIELD(iovec, n, o->cgroup, "OBJECT_SYSTEMD_CGROUP"); |
| IOVEC_ADD_STRING_FIELD(iovec, n, o->session, "OBJECT_SYSTEMD_SESSION"); |
| IOVEC_ADD_NUMERIC_FIELD(iovec, n, o->owner_uid, uid_t, uid_is_valid, UID_FMT, "OBJECT_SYSTEMD_OWNER_UID"); |
| IOVEC_ADD_STRING_FIELD(iovec, n, o->unit, "OBJECT_SYSTEMD_UNIT"); |
| IOVEC_ADD_STRING_FIELD(iovec, n, o->user_unit, "OBJECT_SYSTEMD_USER_UNIT"); |
| IOVEC_ADD_STRING_FIELD(iovec, n, o->slice, "OBJECT_SYSTEMD_SLICE"); |
| IOVEC_ADD_STRING_FIELD(iovec, n, o->user_slice, "OBJECT_SYSTEMD_USER_SLICE"); |
| |
| IOVEC_ADD_ID128_FIELD(iovec, n, o->invocation_id, "OBJECT_SYSTEMD_INVOCATION_ID="); |
| } |
| |
| assert(n <= m); |
| |
| if (tv) { |
| sprintf(source_time, "_SOURCE_REALTIME_TIMESTAMP=" USEC_FMT, timeval_load(tv)); |
| iovec[n++] = IOVEC_MAKE_STRING(source_time); |
| } |
| |
| /* Note that strictly speaking storing the boot id here is |
| * redundant since the entry includes this in-line |
| * anyway. However, we need this indexed, too. */ |
| if (!isempty(s->boot_id_field)) |
| iovec[n++] = IOVEC_MAKE_STRING(s->boot_id_field); |
| |
| if (!isempty(s->machine_id_field)) |
| iovec[n++] = IOVEC_MAKE_STRING(s->machine_id_field); |
| |
| if (!isempty(s->hostname_field)) |
| iovec[n++] = IOVEC_MAKE_STRING(s->hostname_field); |
| |
| assert(n <= m); |
| |
| if (s->split_mode == SPLIT_UID && c && uid_is_valid(c->uid)) |
| /* Split up strictly by (non-root) UID */ |
| journal_uid = c->uid; |
| else if (s->split_mode == SPLIT_LOGIN && c && c->uid > 0 && uid_is_valid(c->owner_uid)) |
| /* Split up by login UIDs. We do this only if the |
| * realuid is not root, in order not to accidentally |
| * leak privileged information to the user that is |
| * logged by a privileged process that is part of an |
| * unprivileged session. */ |
| journal_uid = c->owner_uid; |
| else |
| journal_uid = 0; |
| |
| write_to_journal(s, journal_uid, iovec, n, priority); |
| } |
| |
| void server_driver_message(Server *s, pid_t object_pid, const char *message_id, const char *format, ...) { |
| |
| struct iovec *iovec; |
| size_t n = 0, k, m; |
| va_list ap; |
| int r; |
| |
| assert(s); |
| assert(format); |
| |
| m = N_IOVEC_META_FIELDS + 5 + N_IOVEC_PAYLOAD_FIELDS + client_context_extra_fields_n_iovec(s->my_context) + N_IOVEC_OBJECT_FIELDS; |
| iovec = newa(struct iovec, m); |
| |
| assert_cc(3 == LOG_FAC(LOG_DAEMON)); |
| iovec[n++] = IOVEC_MAKE_STRING("SYSLOG_FACILITY=3"); |
| iovec[n++] = IOVEC_MAKE_STRING("SYSLOG_IDENTIFIER=systemd-journald"); |
| |
| iovec[n++] = IOVEC_MAKE_STRING("_TRANSPORT=driver"); |
| assert_cc(6 == LOG_INFO); |
| iovec[n++] = IOVEC_MAKE_STRING("PRIORITY=6"); |
| |
| if (message_id) |
| iovec[n++] = IOVEC_MAKE_STRING(message_id); |
| k = n; |
| |
| va_start(ap, format); |
| r = log_format_iovec(iovec, m, &n, false, 0, format, ap); |
| /* Error handling below */ |
| va_end(ap); |
| |
| if (r >= 0) |
| dispatch_message_real(s, iovec, n, m, s->my_context, NULL, LOG_INFO, object_pid); |
| |
| while (k < n) |
| free(iovec[k++].iov_base); |
| |
| if (r < 0) { |
| /* We failed to format the message. Emit a warning instead. */ |
| char buf[LINE_MAX]; |
| |
| xsprintf(buf, "MESSAGE=Entry printing failed: %s", strerror(-r)); |
| |
| n = 3; |
| iovec[n++] = IOVEC_MAKE_STRING("PRIORITY=4"); |
| iovec[n++] = IOVEC_MAKE_STRING(buf); |
| dispatch_message_real(s, iovec, n, m, s->my_context, NULL, LOG_INFO, object_pid); |
| } |
| } |
| |
| void server_dispatch_message( |
| Server *s, |
| struct iovec *iovec, size_t n, size_t m, |
| ClientContext *c, |
| const struct timeval *tv, |
| int priority, |
| pid_t object_pid) { |
| |
| uint64_t available = 0; |
| int rl; |
| |
| assert(s); |
| assert(iovec || n == 0); |
| |
| if (n == 0) |
| return; |
| |
| if (LOG_PRI(priority) > s->max_level_store) |
| return; |
| |
| /* Stop early in case the information will not be stored |
| * in a journal. */ |
| if (s->storage == STORAGE_NONE) |
| return; |
| |
| if (c && c->unit) { |
| (void) determine_space(s, &available, NULL); |
| |
| rl = journal_rate_limit_test(s->rate_limit, c->unit, priority & LOG_PRIMASK, available); |
| if (rl == 0) |
| return; |
| |
| /* Write a suppression message if we suppressed something */ |
| if (rl > 1) |
| server_driver_message(s, c->pid, |
| "MESSAGE_ID=" SD_MESSAGE_JOURNAL_DROPPED_STR, |
| LOG_MESSAGE("Suppressed %i messages from %s", rl - 1, c->unit), |
| "N_DROPPED=%i", rl - 1, |
| NULL); |
| } |
| |
| dispatch_message_real(s, iovec, n, m, c, tv, priority, object_pid); |
| } |
| |
| int server_flush_to_var(Server *s, bool require_flag_file) { |
| sd_id128_t machine; |
| sd_journal *j = NULL; |
| char ts[FORMAT_TIMESPAN_MAX]; |
| usec_t start; |
| unsigned n = 0; |
| int r; |
| |
| assert(s); |
| |
| if (!IN_SET(s->storage, STORAGE_AUTO, STORAGE_PERSISTENT)) |
| return 0; |
| |
| if (!s->runtime_journal) |
| return 0; |
| |
| if (require_flag_file && !flushed_flag_is_set()) |
| return 0; |
| |
| (void) system_journal_open(s, true); |
| |
| if (!s->system_journal) |
| return 0; |
| |
| log_debug("Flushing to /var..."); |
| |
| start = now(CLOCK_MONOTONIC); |
| |
| r = sd_id128_get_machine(&machine); |
| if (r < 0) |
| return r; |
| |
| r = sd_journal_open(&j, SD_JOURNAL_RUNTIME_ONLY); |
| if (r < 0) |
| return log_error_errno(r, "Failed to read runtime journal: %m"); |
| |
| sd_journal_set_data_threshold(j, 0); |
| |
| SD_JOURNAL_FOREACH(j) { |
| Object *o = NULL; |
| JournalFile *f; |
| |
| f = j->current_file; |
| assert(f && f->current_offset > 0); |
| |
| n++; |
| |
| r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o); |
| if (r < 0) { |
| log_error_errno(r, "Can't read entry: %m"); |
| goto finish; |
| } |
| |
| r = journal_file_copy_entry(f, s->system_journal, o, f->current_offset); |
| if (r >= 0) |
| continue; |
| |
| if (!shall_try_append_again(s->system_journal, r)) { |
| log_error_errno(r, "Can't write entry: %m"); |
| goto finish; |
| } |
| |
| server_rotate(s); |
| server_vacuum(s, false); |
| |
| if (!s->system_journal) { |
| log_notice("Didn't flush runtime journal since rotation of system journal wasn't successful."); |
| r = -EIO; |
| goto finish; |
| } |
| |
| log_debug("Retrying write."); |
| r = journal_file_copy_entry(f, s->system_journal, o, f->current_offset); |
| if (r < 0) { |
| log_error_errno(r, "Can't write entry: %m"); |
| goto finish; |
| } |
| } |
| |
| r = 0; |
| |
| finish: |
| journal_file_post_change(s->system_journal); |
| |
| s->runtime_journal = journal_file_close(s->runtime_journal); |
| |
| if (r >= 0) |
| (void) rm_rf("/run/log/journal", REMOVE_ROOT); |
| |
| sd_journal_close(j); |
| |
| server_driver_message(s, 0, NULL, |
| LOG_MESSAGE("Time spent on flushing to /var is %s for %u entries.", |
| format_timespan(ts, sizeof(ts), now(CLOCK_MONOTONIC) - start, 0), |
| n), |
| NULL); |
| |
| return r; |
| } |
| |
| int server_process_datagram(sd_event_source *es, int fd, uint32_t revents, void *userdata) { |
| Server *s = userdata; |
| struct ucred *ucred = NULL; |
| struct timeval *tv = NULL; |
| struct cmsghdr *cmsg; |
| char *label = NULL; |
| size_t label_len = 0, m; |
| struct iovec iovec; |
| ssize_t n; |
| int *fds = NULL, v = 0; |
| size_t n_fds = 0; |
| |
| union { |
| struct cmsghdr cmsghdr; |
| |
| /* We use NAME_MAX space for the SELinux label |
| * here. The kernel currently enforces no |
| * limit, but according to suggestions from |
| * the SELinux people this will change and it |
| * will probably be identical to NAME_MAX. For |
| * now we use that, but this should be updated |
| * one day when the final limit is known. */ |
| uint8_t buf[CMSG_SPACE(sizeof(struct ucred)) + |
| CMSG_SPACE(sizeof(struct timeval)) + |
| CMSG_SPACE(sizeof(int)) + /* fd */ |
| CMSG_SPACE(NAME_MAX)]; /* selinux label */ |
| } control = {}; |
| |
| union sockaddr_union sa = {}; |
| |
| struct msghdr msghdr = { |
| .msg_iov = &iovec, |
| .msg_iovlen = 1, |
| .msg_control = &control, |
| .msg_controllen = sizeof(control), |
| .msg_name = &sa, |
| .msg_namelen = sizeof(sa), |
| }; |
| |
| assert(s); |
| assert(fd == s->native_fd || fd == s->syslog_fd || fd == s->audit_fd); |
| |
| if (revents != EPOLLIN) { |
| log_error("Got invalid event from epoll for datagram fd: %"PRIx32, revents); |
| return -EIO; |
| } |
| |
| /* Try to get the right size, if we can. (Not all sockets support SIOCINQ, hence we just try, but don't rely on |
| * it.) */ |
| (void) ioctl(fd, SIOCINQ, &v); |
| |
| /* Fix it up, if it is too small. We use the same fixed value as auditd here. Awful! */ |
| m = PAGE_ALIGN(MAX3((size_t) v + 1, |
| (size_t) LINE_MAX, |
| ALIGN(sizeof(struct nlmsghdr)) + ALIGN((size_t) MAX_AUDIT_MESSAGE_LENGTH)) + 1); |
| |
| if (!GREEDY_REALLOC(s->buffer, s->buffer_size, m)) |
| return log_oom(); |
| |
| iovec.iov_base = s->buffer; |
| iovec.iov_len = s->buffer_size - 1; /* Leave room for trailing NUL we add later */ |
| |
| n = recvmsg(fd, &msghdr, MSG_DONTWAIT|MSG_CMSG_CLOEXEC); |
| if (n < 0) { |
| if (IN_SET(errno, EINTR, EAGAIN)) |
| return 0; |
| |
| return log_error_errno(errno, "recvmsg() failed: %m"); |
| } |
| |
| CMSG_FOREACH(cmsg, &msghdr) |
| if (cmsg->cmsg_level == SOL_SOCKET && |
| cmsg->cmsg_type == SCM_CREDENTIALS && |
| cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred))) |
| ucred = (struct ucred*) CMSG_DATA(cmsg); |
| else if (cmsg->cmsg_level == SOL_SOCKET && |
| cmsg->cmsg_type == SCM_SECURITY) { |
| label = (char*) CMSG_DATA(cmsg); |
| label_len = cmsg->cmsg_len - CMSG_LEN(0); |
| } else if (cmsg->cmsg_level == SOL_SOCKET && |
| cmsg->cmsg_type == SO_TIMESTAMP && |
| cmsg->cmsg_len == CMSG_LEN(sizeof(struct timeval))) |
| tv = (struct timeval*) CMSG_DATA(cmsg); |
| else if (cmsg->cmsg_level == SOL_SOCKET && |
| cmsg->cmsg_type == SCM_RIGHTS) { |
| fds = (int*) CMSG_DATA(cmsg); |
| n_fds = (cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int); |
| } |
| |
| /* And a trailing NUL, just in case */ |
| s->buffer[n] = 0; |
| |
| if (fd == s->syslog_fd) { |
| if (n > 0 && n_fds == 0) |
| server_process_syslog_message(s, s->buffer, n, ucred, tv, label, label_len); |
| else if (n_fds > 0) |
| log_warning("Got file descriptors via syslog socket. Ignoring."); |
| |
| } else if (fd == s->native_fd) { |
| if (n > 0 && n_fds == 0) |
| server_process_native_message(s, s->buffer, n, ucred, tv, label, label_len); |
| else if (n == 0 && n_fds == 1) |
| server_process_native_file(s, fds[0], ucred, tv, label, label_len); |
| else if (n_fds > 0) |
| log_warning("Got too many file descriptors via native socket. Ignoring."); |
| |
| } else { |
| assert(fd == s->audit_fd); |
| |
| if (n > 0 && n_fds == 0) |
| server_process_audit_message(s, s->buffer, n, ucred, &sa, msghdr.msg_namelen); |
| else if (n_fds > 0) |
| log_warning("Got file descriptors via audit socket. Ignoring."); |
| } |
| |
| close_many(fds, n_fds); |
| return 0; |
| } |
| |
| static int dispatch_sigusr1(sd_event_source *es, const struct signalfd_siginfo *si, void *userdata) { |
| Server *s = userdata; |
| int r; |
| |
| assert(s); |
| |
| log_info("Received request to flush runtime journal from PID " PID_FMT, si->ssi_pid); |
| |
| (void) server_flush_to_var(s, false); |
| server_sync(s); |
| server_vacuum(s, false); |
| |
| r = touch("/run/systemd/journal/flushed"); |
| if (r < 0) |
| log_warning_errno(r, "Failed to touch /run/systemd/journal/flushed, ignoring: %m"); |
| |
| server_space_usage_message(s, NULL); |
| return 0; |
| } |
| |
| static int dispatch_sigusr2(sd_event_source *es, const struct signalfd_siginfo *si, void *userdata) { |
| Server *s = userdata; |
| int r; |
| |
| assert(s); |
| |
| log_info("Received request to rotate journal from PID " PID_FMT, si->ssi_pid); |
| server_rotate(s); |
| server_vacuum(s, true); |
| |
| if (s->system_journal) |
| patch_min_use(&s->system_storage); |
| if (s->runtime_journal) |
| patch_min_use(&s->runtime_storage); |
| |
| /* Let clients know when the most recent rotation happened. */ |
| r = write_timestamp_file_atomic("/run/systemd/journal/rotated", now(CLOCK_MONOTONIC)); |
| if (r < 0) |
| log_warning_errno(r, "Failed to write /run/systemd/journal/rotated, ignoring: %m"); |
| |
| return 0; |
| } |
| |
| static int dispatch_sigterm(sd_event_source *es, const struct signalfd_siginfo *si, void *userdata) { |
| Server *s = userdata; |
| |
| assert(s); |
| |
| log_received_signal(LOG_INFO, si); |
| |
| sd_event_exit(s->event, 0); |
| return 0; |
| } |
| |
| static int dispatch_sigrtmin1(sd_event_source *es, const struct signalfd_siginfo *si, void *userdata) { |
| Server *s = userdata; |
| int r; |
| |
| assert(s); |
| |
| log_debug("Received request to sync from PID " PID_FMT, si->ssi_pid); |
| |
| server_sync(s); |
| |
| /* Let clients know when the most recent sync happened. */ |
| r = write_timestamp_file_atomic("/run/systemd/journal/synced", now(CLOCK_MONOTONIC)); |
| if (r < 0) |
| log_warning_errno(r, "Failed to write /run/systemd/journal/synced, ignoring: %m"); |
| |
| return 0; |
| } |
| |
| static int setup_signals(Server *s) { |
| int r; |
| |
| assert(s); |
| |
| assert_se(sigprocmask_many(SIG_SETMASK, NULL, SIGINT, SIGTERM, SIGUSR1, SIGUSR2, SIGRTMIN+1, -1) >= 0); |
| |
| r = sd_event_add_signal(s->event, &s->sigusr1_event_source, SIGUSR1, dispatch_sigusr1, s); |
| if (r < 0) |
| return r; |
| |
| r = sd_event_add_signal(s->event, &s->sigusr2_event_source, SIGUSR2, dispatch_sigusr2, s); |
| if (r < 0) |
| return r; |
| |
| r = sd_event_add_signal(s->event, &s->sigterm_event_source, SIGTERM, dispatch_sigterm, s); |
| if (r < 0) |
| return r; |
| |
| /* Let's process SIGTERM late, so that we flush all queued |
| * messages to disk before we exit */ |
| r = sd_event_source_set_priority(s->sigterm_event_source, SD_EVENT_PRIORITY_NORMAL+20); |
| if (r < 0) |
| return r; |
| |
| /* When journald is invoked on the terminal (when debugging), |
| * it's useful if C-c is handled equivalent to SIGTERM. */ |
| r = sd_event_add_signal(s->event, &s->sigint_event_source, SIGINT, dispatch_sigterm, s); |
| if (r < 0) |
| return r; |
| |
| r = sd_event_source_set_priority(s->sigint_event_source, SD_EVENT_PRIORITY_NORMAL+20); |
| if (r < 0) |
| return r; |
| |
| /* SIGRTMIN+1 causes an immediate sync. We process this very |
| * late, so that everything else queued at this point is |
| * really written to disk. Clients can watch |
| * /run/systemd/journal/synced with inotify until its mtime |
| * changes to see when a sync happened. */ |
| r = sd_event_add_signal(s->event, &s->sigrtmin1_event_source, SIGRTMIN+1, dispatch_sigrtmin1, s); |
| if (r < 0) |
| return r; |
| |
| r = sd_event_source_set_priority(s->sigrtmin1_event_source, SD_EVENT_PRIORITY_NORMAL+15); |
| if (r < 0) |
| return r; |
| |
| return 0; |
| } |
| |
| static int parse_proc_cmdline_item(const char *key, const char *value, void *data) { |
| Server *s = data; |
| int r; |
| |
| assert(s); |
| |
| if (proc_cmdline_key_streq(key, "systemd.journald.forward_to_syslog")) { |
| |
| r = value ? parse_boolean(value) : true; |
| if (r < 0) |
| log_warning("Failed to parse forward to syslog switch \"%s\". Ignoring.", value); |
| else |
| s->forward_to_syslog = r; |
| |
| } else if (proc_cmdline_key_streq(key, "systemd.journald.forward_to_kmsg")) { |
| |
| r = value ? parse_boolean(value) : true; |
| if (r < 0) |
| log_warning("Failed to parse forward to kmsg switch \"%s\". Ignoring.", value); |
| else |
| s->forward_to_kmsg = r; |
| |
| } else if (proc_cmdline_key_streq(key, "systemd.journald.forward_to_console")) { |
| |
| r = value ? parse_boolean(value) : true; |
| if (r < 0) |
| log_warning("Failed to parse forward to console switch \"%s\". Ignoring.", value); |
| else |
| s->forward_to_console = r; |
| |
| } else if (proc_cmdline_key_streq(key, "systemd.journald.forward_to_wall")) { |
| |
| r = value ? parse_boolean(value) : true; |
| if (r < 0) |
| log_warning("Failed to parse forward to wall switch \"%s\". Ignoring.", value); |
| else |
| s->forward_to_wall = r; |
| |
| } else if (proc_cmdline_key_streq(key, "systemd.journald.max_level_console")) { |
| |
| if (proc_cmdline_value_missing(key, value)) |
| return 0; |
| |
| r = log_level_from_string(value); |
| if (r < 0) |
| log_warning("Failed to parse max level console value \"%s\". Ignoring.", value); |
| else |
| s->max_level_console = r; |
| |
| } else if (proc_cmdline_key_streq(key, "systemd.journald.max_level_store")) { |
| |
| if (proc_cmdline_value_missing(key, value)) |
| return 0; |
| |
| r = log_level_from_string(value); |
| if (r < 0) |
| log_warning("Failed to parse max level store value \"%s\". Ignoring.", value); |
| else |
| s->max_level_store = r; |
| |
| } else if (proc_cmdline_key_streq(key, "systemd.journald.max_level_syslog")) { |
| |
| if (proc_cmdline_value_missing(key, value)) |
| return 0; |
| |
| r = log_level_from_string(value); |
| if (r < 0) |
| log_warning("Failed to parse max level syslog value \"%s\". Ignoring.", value); |
| else |
| s->max_level_syslog = r; |
| |
| } else if (proc_cmdline_key_streq(key, "systemd.journald.max_level_kmsg")) { |
| |
| if (proc_cmdline_value_missing(key, value)) |
| return 0; |
| |
| r = log_level_from_string(value); |
| if (r < 0) |
| log_warning("Failed to parse max level kmsg value \"%s\". Ignoring.", value); |
| else |
| s->max_level_kmsg = r; |
| |
| } else if (proc_cmdline_key_streq(key, "systemd.journald.max_level_wall")) { |
| |
| if (proc_cmdline_value_missing(key, value)) |
| return 0; |
| |
| r = log_level_from_string(value); |
| if (r < 0) |
| log_warning("Failed to parse max level wall value \"%s\". Ignoring.", value); |
| else |
| s->max_level_wall = r; |
| |
| } else if (startswith(key, "systemd.journald")) |
| log_warning("Unknown journald kernel command line option \"%s\". Ignoring.", key); |
| |
| /* do not warn about state here, since probably systemd already did */ |
| return 0; |
| } |
| |
| static int server_parse_config_file(Server *s) { |
| assert(s); |
| |
| return config_parse_many_nulstr(PKGSYSCONFDIR "/journald.conf", |
| CONF_PATHS_NULSTR("systemd/journald.conf.d"), |
| "Journal\0", |
| config_item_perf_lookup, journald_gperf_lookup, |
| CONFIG_PARSE_WARN, s); |
| } |
| |
| static int server_dispatch_sync(sd_event_source *es, usec_t t, void *userdata) { |
| Server *s = userdata; |
| |
| assert(s); |
| |
| server_sync(s); |
| return 0; |
| } |
| |
| int server_schedule_sync(Server *s, int priority) { |
| int r; |
| |
| assert(s); |
| |
| if (priority <= LOG_CRIT) { |
| /* Immediately sync to disk when this is of priority CRIT, ALERT, EMERG */ |
| server_sync(s); |
| return 0; |
| } |
| |
| if (s->sync_scheduled) |
| return 0; |
| |
| if (s->sync_interval_usec > 0) { |
| usec_t when; |
| |
| r = sd_event_now(s->event, CLOCK_MONOTONIC, &when); |
| if (r < 0) |
| return r; |
| |
| when += s->sync_interval_usec; |
| |
| if (!s->sync_event_source) { |
| r = sd_event_add_time( |
| s->event, |
| &s->sync_event_source, |
| CLOCK_MONOTONIC, |
| when, 0, |
| server_dispatch_sync, s); |
| if (r < 0) |
| return r; |
| |
| r = sd_event_source_set_priority(s->sync_event_source, SD_EVENT_PRIORITY_IMPORTANT); |
| } else { |
| r = sd_event_source_set_time(s->sync_event_source, when); |
| if (r < 0) |
| return r; |
| |
| r = sd_event_source_set_enabled(s->sync_event_source, SD_EVENT_ONESHOT); |
| } |
| if (r < 0) |
| return r; |
| |
| s->sync_scheduled = true; |
| } |
| |
| return 0; |
| } |
| |
| static int dispatch_hostname_change(sd_event_source *es, int fd, uint32_t revents, void *userdata) { |
| Server *s = userdata; |
| |
| assert(s); |
| |
| server_cache_hostname(s); |
| return 0; |
| } |
| |
| static int server_open_hostname(Server *s) { |
| int r; |
| |
| assert(s); |
| |
| s->hostname_fd = open("/proc/sys/kernel/hostname", |
| O_RDONLY|O_CLOEXEC|O_NONBLOCK|O_NOCTTY); |
| if (s->hostname_fd < 0) |
| return log_error_errno(errno, "Failed to open /proc/sys/kernel/hostname: %m"); |
| |
| r = sd_event_add_io(s->event, &s->hostname_event_source, s->hostname_fd, 0, dispatch_hostname_change, s); |
| if (r < 0) { |
| /* kernels prior to 3.2 don't support polling this file. Ignore |
| * the failure. */ |
| if (r == -EPERM) { |
| log_warning_errno(r, "Failed to register hostname fd in event loop, ignoring: %m"); |
| s->hostname_fd = safe_close(s->hostname_fd); |
| return 0; |
| } |
| |
| return log_error_errno(r, "Failed to register hostname fd in event loop: %m"); |
| } |
| |
| r = sd_event_source_set_priority(s->hostname_event_source, SD_EVENT_PRIORITY_IMPORTANT-10); |
| if (r < 0) |
| return log_error_errno(r, "Failed to adjust priority of host name event source: %m"); |
| |
| return 0; |
| } |
| |
| static int dispatch_notify_event(sd_event_source *es, int fd, uint32_t revents, void *userdata) { |
| Server *s = userdata; |
| int r; |
| |
| assert(s); |
| assert(s->notify_event_source == es); |
| assert(s->notify_fd == fd); |
| |
| /* The $NOTIFY_SOCKET is writable again, now send exactly one |
| * message on it. Either it's the watchdog event, the initial |
| * READY=1 event or an stdout stream event. If there's nothing |
| * to write anymore, turn our event source off. The next time |
| * there's something to send it will be turned on again. */ |
| |
| if (!s->sent_notify_ready) { |
| static const char p[] = |
| "READY=1\n" |
| "STATUS=Processing requests..."; |
| ssize_t l; |
| |
| l = send(s->notify_fd, p, strlen(p), MSG_DONTWAIT); |
| if (l < 0) { |
| if (errno == EAGAIN) |
| return 0; |
| |
| return log_error_errno(errno, "Failed to send READY=1 notification message: %m"); |
| } |
| |
| s->sent_notify_ready = true; |
| log_debug("Sent READY=1 notification."); |
| |
| } else if (s->send_watchdog) { |
| |
| static const char p[] = |
| "WATCHDOG=1"; |
| |
| ssize_t l; |
| |
| l = send(s->notify_fd, p, strlen(p), MSG_DONTWAIT); |
| if (l < 0) { |
| if (errno == EAGAIN) |
| return 0; |
| |
| return log_error_errno(errno, "Failed to send WATCHDOG=1 notification message: %m"); |
| } |
| |
| s->send_watchdog = false; |
| log_debug("Sent WATCHDOG=1 notification."); |
| |
| } else if (s->stdout_streams_notify_queue) |
| /* Dispatch one stream notification event */ |
| stdout_stream_send_notify(s->stdout_streams_notify_queue); |
| |
| /* Leave us enabled if there's still more to do. */ |
| if (s->send_watchdog || s->stdout_streams_notify_queue) |
| return 0; |
| |
| /* There was nothing to do anymore, let's turn ourselves off. */ |
| r = sd_event_source_set_enabled(es, SD_EVENT_OFF); |
| if (r < 0) |
| return log_error_errno(r, "Failed to turn off notify event source: %m"); |
| |
| return 0; |
| } |
| |
| static int dispatch_watchdog(sd_event_source *es, uint64_t usec, void *userdata) { |
| Server *s = userdata; |
| int r; |
| |
| assert(s); |
| |
| s->send_watchdog = true; |
| |
| r = sd_event_source_set_enabled(s->notify_event_source, SD_EVENT_ON); |
| if (r < 0) |
| log_warning_errno(r, "Failed to turn on notify event source: %m"); |
| |
| r = sd_event_source_set_time(s->watchdog_event_source, usec + s->watchdog_usec / 2); |
| if (r < 0) |
| return log_error_errno(r, "Failed to restart watchdog event source: %m"); |
| |
| r = sd_event_source_set_enabled(s->watchdog_event_source, SD_EVENT_ON); |
| if (r < 0) |
| return log_error_errno(r, "Failed to enable watchdog event source: %m"); |
| |
| return 0; |
| } |
| |
| static int server_connect_notify(Server *s) { |
| union sockaddr_union sa = { |
| .un.sun_family = AF_UNIX, |
| }; |
| const char *e; |
| int r; |
| |
| assert(s); |
| assert(s->notify_fd < 0); |
| assert(!s->notify_event_source); |
| |
| /* |
| So here's the problem: we'd like to send notification |
| messages to PID 1, but we cannot do that via sd_notify(), |
| since that's synchronous, and we might end up blocking on |
| it. Specifically: given that PID 1 might block on |
| dbus-daemon during IPC, and dbus-daemon is logging to us, |
| and might hence block on us, we might end up in a deadlock |
| if we block on sending PID 1 notification messages — by |
| generating a full blocking circle. To avoid this, let's |
| create a non-blocking socket, and connect it to the |
| notification socket, and then wait for POLLOUT before we |
| send anything. This should efficiently avoid any deadlocks, |
| as we'll never block on PID 1, hence PID 1 can safely block |
| on dbus-daemon which can safely block on us again. |
| |
| Don't think that this issue is real? It is, see: |
| https://github.com/systemd/systemd/issues/1505 |
| */ |
| |
| e = getenv("NOTIFY_SOCKET"); |
| if (!e) |
| return 0; |
| |
| if (!IN_SET(e[0], '@', '/') || e[1] == 0) { |
| log_error("NOTIFY_SOCKET set to an invalid value: %s", e); |
| return -EINVAL; |
| } |
| |
| if (strlen(e) > sizeof(sa.un.sun_path)) { |
| log_error("NOTIFY_SOCKET path too long: %s", e); |
| return -EINVAL; |
| } |
| |
| s->notify_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0); |
| if (s->notify_fd < 0) |
| return log_error_errno(errno, "Failed to create notify socket: %m"); |
| |
| (void) fd_inc_sndbuf(s->notify_fd, NOTIFY_SNDBUF_SIZE); |
| |
| strncpy(sa.un.sun_path, e, sizeof(sa.un.sun_path)); |
| if (sa.un.sun_path[0] == '@') |
| sa.un.sun_path[0] = 0; |
| |
| r = connect(s->notify_fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)); |
| if (r < 0) |
| return log_error_errno(errno, "Failed to connect to notify socket: %m"); |
| |
| r = sd_event_add_io(s->event, &s->notify_event_source, s->notify_fd, EPOLLOUT, dispatch_notify_event, s); |
| if (r < 0) |
| return log_error_errno(r, "Failed to watch notification socket: %m"); |
| |
| if (sd_watchdog_enabled(false, &s->watchdog_usec) > 0) { |
| s->send_watchdog = true; |
| |
| r = sd_event_add_time(s->event, &s->watchdog_event_source, CLOCK_MONOTONIC, now(CLOCK_MONOTONIC) + s->watchdog_usec/2, s->watchdog_usec/4, dispatch_watchdog, s); |
| if (r < 0) |
| return log_error_errno(r, "Failed to add watchdog time event: %m"); |
| } |
| |
| /* This should fire pretty soon, which we'll use to send the |
| * READY=1 event. */ |
| |
| return 0; |
| } |
| |
| int server_init(Server *s) { |
| _cleanup_fdset_free_ FDSet *fds = NULL; |
| int n, r, fd; |
| bool no_sockets; |
| |
| assert(s); |
| |
| zero(*s); |
| s->syslog_fd = s->native_fd = s->stdout_fd = s->dev_kmsg_fd = s->audit_fd = s->hostname_fd = s->notify_fd = -1; |
| s->compress.enabled = true; |
| s->compress.threshold_bytes = (uint64_t) -1; |
| s->seal = true; |
| s->read_kmsg = true; |
| |
| s->watchdog_usec = USEC_INFINITY; |
| |
| s->sync_interval_usec = DEFAULT_SYNC_INTERVAL_USEC; |
| s->sync_scheduled = false; |
| |
| s->rate_limit_interval = DEFAULT_RATE_LIMIT_INTERVAL; |
| s->rate_limit_burst = DEFAULT_RATE_LIMIT_BURST; |
| |
| s->forward_to_wall = true; |
| |
| s->max_file_usec = DEFAULT_MAX_FILE_USEC; |
| |
| s->max_level_store = LOG_DEBUG; |
| s->max_level_syslog = LOG_DEBUG; |
| s->max_level_kmsg = LOG_NOTICE; |
| s->max_level_console = LOG_INFO; |
| s->max_level_wall = LOG_EMERG; |
| |
| s->line_max = DEFAULT_LINE_MAX; |
| |
| journal_reset_metrics(&s->system_storage.metrics); |
| journal_reset_metrics(&s->runtime_storage.metrics); |
| |
| server_parse_config_file(s); |
| |
| r = proc_cmdline_parse(parse_proc_cmdline_item, s, PROC_CMDLINE_STRIP_RD_PREFIX); |
| if (r < 0) |
| log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); |
| |
| if (!!s->rate_limit_interval ^ !!s->rate_limit_burst) { |
| log_debug("Setting both rate limit interval and burst from "USEC_FMT",%u to 0,0", |
| s->rate_limit_interval, s->rate_limit_burst); |
| s->rate_limit_interval = s->rate_limit_burst = 0; |
| } |
| |
| (void) mkdir_p("/run/systemd/journal", 0755); |
| |
| s->user_journals = ordered_hashmap_new(NULL); |
| if (!s->user_journals) |
| return log_oom(); |
| |
| s->mmap = mmap_cache_new(); |
| if (!s->mmap) |
| return log_oom(); |
| |
| s->deferred_closes = set_new(NULL); |
| if (!s->deferred_closes) |
| return log_oom(); |
| |
| r = sd_event_default(&s->event); |
| if (r < 0) |
| return log_error_errno(r, "Failed to create event loop: %m"); |
| |
| n = sd_listen_fds(true); |
| if (n < 0) |
| return log_error_errno(n, "Failed to read listening file descriptors from environment: %m"); |
| |
| for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd++) { |
| |
| if (sd_is_socket_unix(fd, SOCK_DGRAM, -1, "/run/systemd/journal/socket", 0) > 0) { |
| |
| if (s->native_fd >= 0) { |
| log_error("Too many native sockets passed."); |
| return -EINVAL; |
| } |
| |
| s->native_fd = fd; |
| |
| } else if (sd_is_socket_unix(fd, SOCK_STREAM, 1, "/run/systemd/journal/stdout", 0) > 0) { |
| |
| if (s->stdout_fd >= 0) { |
| log_error("Too many stdout sockets passed."); |
| return -EINVAL; |
| } |
| |
| s->stdout_fd = fd; |
| |
| } else if (sd_is_socket_unix(fd, SOCK_DGRAM, -1, "/dev/log", 0) > 0 || |
| sd_is_socket_unix(fd, SOCK_DGRAM, -1, "/run/systemd/journal/dev-log", 0) > 0) { |
| |
| if (s->syslog_fd >= 0) { |
| log_error("Too many /dev/log sockets passed."); |
| return -EINVAL; |
| } |
| |
| s->syslog_fd = fd; |
| |
| } else if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1) > 0) { |
| |
| if (s->audit_fd >= 0) { |
| log_error("Too many audit sockets passed."); |
| return -EINVAL; |
| } |
| |
| s->audit_fd = fd; |
| |
| } else { |
| |
| if (!fds) { |
| fds = fdset_new(); |
| if (!fds) |
| return log_oom(); |
| } |
| |
| r = fdset_put(fds, fd); |
| if (r < 0) |
| return log_oom(); |
| } |
| } |
| |
| /* Try to restore streams, but don't bother if this fails */ |
| (void) server_restore_streams(s, fds); |
| |
| if (fdset_size(fds) > 0) { |
| log_warning("%u unknown file descriptors passed, closing.", fdset_size(fds)); |
| fds = fdset_free(fds); |
| } |
| |
| no_sockets = s->native_fd < 0 && s->stdout_fd < 0 && s->syslog_fd < 0 && s->audit_fd < 0; |
| |
| /* always open stdout, syslog, native, and kmsg sockets */ |
| |
| /* systemd-journald.socket: /run/systemd/journal/stdout */ |
| r = server_open_stdout_socket(s); |
| if (r < 0) |
| return r; |
| |
| /* systemd-journald-dev-log.socket: /run/systemd/journal/dev-log */ |
| r = server_open_syslog_socket(s); |
| if (r < 0) |
| return r; |
| |
| /* systemd-journald.socket: /run/systemd/journal/socket */ |
| r = server_open_native_socket(s); |
| if (r < 0) |
| return r; |
| |
| /* /dev/kmsg */ |
| r = server_open_dev_kmsg(s); |
| if (r < 0) |
| return r; |
| |
| /* Unless we got *some* sockets and not audit, open audit socket */ |
| if (s->audit_fd >= 0 || no_sockets) { |
| r = server_open_audit(s); |
| if (r < 0) |
| return r; |
| } |
| |
| r = server_open_kernel_seqnum(s); |
| if (r < 0) |
| return r; |
| |
| r = server_open_hostname(s); |
| if (r < 0) |
| return r; |
| |
| r = setup_signals(s); |
| if (r < 0) |
| return r; |
| |
| s->udev = udev_new(); |
| if (!s->udev) |
| return -ENOMEM; |
| |
| s->rate_limit = journal_rate_limit_new(s->rate_limit_interval, s->rate_limit_burst); |
| if (!s->rate_limit) |
| return -ENOMEM; |
| |
| r = cg_get_root_path(&s->cgroup_root); |
| if (r < 0) |
| return r; |
| |
| server_cache_hostname(s); |
| server_cache_boot_id(s); |
| server_cache_machine_id(s); |
| |
| s->runtime_storage.name = "Runtime journal"; |
| s->system_storage.name = "System journal"; |
| |
| s->runtime_storage.path = strjoin("/run/log/journal/", SERVER_MACHINE_ID(s)); |
| s->system_storage.path = strjoin("/var/log/journal/", SERVER_MACHINE_ID(s)); |
| if (!s->runtime_storage.path || !s->system_storage.path) |
| return -ENOMEM; |
| |
| (void) server_connect_notify(s); |
| |
| (void) client_context_acquire_default(s); |
| |
| return system_journal_open(s, false); |
| } |
| |
| void server_maybe_append_tags(Server *s) { |
| #if HAVE_GCRYPT |
| JournalFile *f; |
| Iterator i; |
| usec_t n; |
| |
| n = now(CLOCK_REALTIME); |
| |
| if (s->system_journal) |
| journal_file_maybe_append_tag(s->system_journal, n); |
| |
| ORDERED_HASHMAP_FOREACH(f, s->user_journals, i) |
| journal_file_maybe_append_tag(f, n); |
| #endif |
| } |
| |
| void server_done(Server *s) { |
| assert(s); |
| |
| set_free_with_destructor(s->deferred_closes, journal_file_close); |
| |
| while (s->stdout_streams) |
| stdout_stream_free(s->stdout_streams); |
| |
| client_context_flush_all(s); |
| |
| if (s->system_journal) |
| (void) journal_file_close(s->system_journal); |
| |
| if (s->runtime_journal) |
| (void) journal_file_close(s->runtime_journal); |
| |
| ordered_hashmap_free_with_destructor(s->user_journals, journal_file_close); |
| |
| sd_event_source_unref(s->syslog_event_source); |
| sd_event_source_unref(s->native_event_source); |
| sd_event_source_unref(s->stdout_event_source); |
| sd_event_source_unref(s->dev_kmsg_event_source); |
| sd_event_source_unref(s->audit_event_source); |
| sd_event_source_unref(s->sync_event_source); |
| sd_event_source_unref(s->sigusr1_event_source); |
| sd_event_source_unref(s->sigusr2_event_source); |
| sd_event_source_unref(s->sigterm_event_source); |
| sd_event_source_unref(s->sigint_event_source); |
| sd_event_source_unref(s->sigrtmin1_event_source); |
| sd_event_source_unref(s->hostname_event_source); |
| sd_event_source_unref(s->notify_event_source); |
| sd_event_source_unref(s->watchdog_event_source); |
| sd_event_unref(s->event); |
| |
| safe_close(s->syslog_fd); |
| safe_close(s->native_fd); |
| safe_close(s->stdout_fd); |
| safe_close(s->dev_kmsg_fd); |
| safe_close(s->audit_fd); |
| safe_close(s->hostname_fd); |
| safe_close(s->notify_fd); |
| |
| if (s->rate_limit) |
| journal_rate_limit_free(s->rate_limit); |
| |
| if (s->kernel_seqnum) |
| munmap(s->kernel_seqnum, sizeof(uint64_t)); |
| |
| free(s->buffer); |
| free(s->tty_path); |
| free(s->cgroup_root); |
| free(s->hostname_field); |
| free(s->runtime_storage.path); |
| free(s->system_storage.path); |
| |
| if (s->mmap) |
| mmap_cache_unref(s->mmap); |
| |
| udev_unref(s->udev); |
| } |
| |
| static const char* const storage_table[_STORAGE_MAX] = { |
| [STORAGE_AUTO] = "auto", |
| [STORAGE_VOLATILE] = "volatile", |
| [STORAGE_PERSISTENT] = "persistent", |
| [STORAGE_NONE] = "none" |
| }; |
| |
| DEFINE_STRING_TABLE_LOOKUP(storage, Storage); |
| DEFINE_CONFIG_PARSE_ENUM(config_parse_storage, storage, Storage, "Failed to parse storage setting"); |
| |
| static const char* const split_mode_table[_SPLIT_MAX] = { |
| [SPLIT_LOGIN] = "login", |
| [SPLIT_UID] = "uid", |
| [SPLIT_NONE] = "none", |
| }; |
| |
| DEFINE_STRING_TABLE_LOOKUP(split_mode, SplitMode); |
| DEFINE_CONFIG_PARSE_ENUM(config_parse_split_mode, split_mode, SplitMode, "Failed to parse split mode setting"); |
| |
| int config_parse_line_max( |
| const char* unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| size_t *sz = data; |
| int r; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| if (isempty(rvalue)) |
| /* Empty assignment means default */ |
| *sz = DEFAULT_LINE_MAX; |
| else { |
| uint64_t v; |
| |
| r = parse_size(rvalue, 1024, &v); |
| if (r < 0) { |
| log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse LineMax= value, ignoring: %s", rvalue); |
| return 0; |
| } |
| |
| if (v < 79) { |
| /* Why specify 79 here as minimum line length? Simply, because the most common traditional |
| * terminal size is 80ch, and it might make sense to break one character before the natural |
| * line break would occur on that. */ |
| log_syntax(unit, LOG_WARNING, filename, line, 0, "LineMax= too small, clamping to 79: %s", rvalue); |
| *sz = 79; |
| } else if (v > (uint64_t) (SSIZE_MAX-1)) { |
| /* So, why specify SSIZE_MAX-1 here? Because that's one below the largest size value read() |
| * can return, and we need one extra byte for the trailing NUL byte. Of course IRL such large |
| * memory allocations will fail anyway, hence this limit is mostly theoretical anyway, as we'll |
| * fail much earlier anyway. */ |
| log_syntax(unit, LOG_WARNING, filename, line, 0, "LineMax= too large, clamping to %" PRIu64 ": %s", (uint64_t) (SSIZE_MAX-1), rvalue); |
| *sz = SSIZE_MAX-1; |
| } else |
| *sz = (size_t) v; |
| } |
| |
| return 0; |
| } |
| |
| int config_parse_compress(const char* unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| JournalCompressOptions* compress = data; |
| int r; |
| |
| if (streq(rvalue, "1")) { |
| log_syntax(unit, LOG_WARNING, filename, line, 0, |
| "Compress= ambiguously specified as 1, enabling compression with default threshold"); |
| compress->enabled = true; |
| } else if (streq(rvalue, "0")) { |
| log_syntax(unit, LOG_WARNING, filename, line, 0, |
| "Compress= ambiguously specified as 0, disabling compression"); |
| compress->enabled = false; |
| } else if ((r = parse_boolean(rvalue)) >= 0) |
| compress->enabled = r; |
| else if (parse_size(rvalue, 1024, &compress->threshold_bytes) == 0) |
| compress->enabled = true; |
| else if (isempty(rvalue)) { |
| compress->enabled = true; |
| compress->threshold_bytes = (uint64_t) -1; |
| } else |
| log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse Compress= value, ignoring: %s", rvalue); |
| |
| return 0; |
| } |