diff options
Diffstat (limited to 'src/journal/journald-server.c')
| -rw-r--r-- | src/journal/journald-server.c | 1993 |
1 files changed, 0 insertions, 1993 deletions
diff --git a/src/journal/journald-server.c b/src/journal/journald-server.c deleted file mode 100644 index 4f53bf01c3..0000000000 --- a/src/journal/journald-server.c +++ /dev/null @@ -1,1993 +0,0 @@ -/*** - This file is part of systemd. - - Copyright 2011 Lennart Poettering - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -#ifdef 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 <systemd/sd-daemon.h> -#include <systemd/sd-journal.h> -#include <systemd/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 "formats-util.h" -#include "fs-util.h" -#include "hashmap.h" -#include "hostname-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-kmsg.h" -#include "journald-native.h" -#include "journald-rate-limit.h" -#include "journald-server.h" -#include "journald-stream.h" -#include "journald-syslog.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 "user-util.h" -#include "log.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 1000 -#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) - -static int determine_space_for( - Server *s, - JournalMetrics *metrics, - const char *path, - const char *name, - bool verbose, - bool patch_min_use, - uint64_t *available, - uint64_t *limit) { - - uint64_t sum = 0, ss_avail, avail; - _cleanup_closedir_ DIR *d = NULL; - struct dirent *de; - struct statvfs ss; - const char *p; - usec_t ts; - - assert(s); - assert(metrics); - assert(path); - assert(name); - - ts = now(CLOCK_MONOTONIC); - - if (!verbose && s->cached_space_timestamp + RECHECK_SPACE_USEC > ts) { - - if (available) - *available = s->cached_space_available; - if (limit) - *limit = s->cached_space_limit; - - return 0; - } - - p = strjoina(path, SERVER_MACHINE_ID(s)); - d = opendir(p); - if (!d) - return log_full_errno(errno == ENOENT ? LOG_DEBUG : LOG_ERR, errno, "Failed to open %s: %m", p); - - if (fstatvfs(dirfd(d), &ss) < 0) - return log_error_errno(errno, "Failed to fstatvfs(%s): %m", p); - - 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", p, de->d_name); - continue; - } - - if (!S_ISREG(st.st_mode)) - continue; - - sum += (uint64_t) st.st_blocks * 512UL; - } - - /* If requested, then 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. */ - - if (patch_min_use) - metrics->min_use = MAX(metrics->min_use, sum); - - ss_avail = ss.f_bsize * ss.f_bavail; - avail = LESS_BY(ss_avail, metrics->keep_free); - - s->cached_space_limit = MIN(MAX(sum + avail, metrics->min_use), metrics->max_use); - s->cached_space_available = LESS_BY(s->cached_space_limit, sum); - s->cached_space_timestamp = ts; - - if (verbose) { - 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]; - format_bytes(fb1, sizeof(fb1), sum); - format_bytes(fb2, sizeof(fb2), metrics->max_use); - format_bytes(fb3, sizeof(fb3), metrics->keep_free); - format_bytes(fb4, sizeof(fb4), ss_avail); - format_bytes(fb5, sizeof(fb5), s->cached_space_limit); - format_bytes(fb6, sizeof(fb6), s->cached_space_available); - - server_driver_message(s, SD_MESSAGE_JOURNAL_USAGE, - LOG_MESSAGE("%s (%s) is %s, max %s, %s free.", - name, path, fb1, fb5, fb6), - "JOURNAL_NAME=%s", name, - "JOURNAL_PATH=%s", path, - "CURRENT_USE=%"PRIu64, sum, - "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, ss_avail, - "DISK_AVAILABLE_PRETTY=%s", fb4, - "LIMIT=%"PRIu64, s->cached_space_limit, - "LIMIT_PRETTY=%s", fb5, - "AVAILABLE=%"PRIu64, s->cached_space_available, - "AVAILABLE_PRETTY=%s", fb6, - NULL); - } - - if (available) - *available = s->cached_space_available; - if (limit) - *limit = s->cached_space_limit; - - return 1; -} - -static int determine_space(Server *s, bool verbose, bool patch_min_use, uint64_t *available, uint64_t *limit) { - JournalMetrics *metrics; - const char *path, *name; - - assert(s); - - if (s->system_journal) { - path = "/var/log/journal/"; - metrics = &s->system_metrics; - name = "System journal"; - } else { - path = "/run/log/journal/"; - metrics = &s->runtime_metrics; - name = "Runtime journal"; - } - - return determine_space_for(s, metrics, path, name, verbose, patch_min_use, available, limit); -} - -static void server_add_acls(JournalFile *f, uid_t uid) { -#ifdef HAVE_ACL - int r; -#endif - assert(f); - -#ifdef HAVE_ACL - if (uid <= SYSTEM_UID_MAX) - 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, seal, metrics, s->mmap, NULL, &f); - else - r = journal_file_open(fname, flags, 0640, s->compress, seal, metrics, s->mmap, 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) { - journal_file_close(f); - return r; - } - - *ret = f; - 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); - - /* 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 <= SYSTEM_UID_MAX) - 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); - journal_file_close(f); - } - - r = open_journal(s, true, p, O_RDWR|O_CREAT, s->seal, &s->system_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) { - 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, seal); - if (r < 0) - if (*f) - log_error_errno(r, "Failed to rotate %s: %m", (*f)->path); - else - log_error_errno(r, "Failed to create new %s journal: %m", name); - else - 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); - } -} - -void server_sync(Server *s) { - JournalFile *f; - Iterator i; - int r; - - if (s->system_journal) { - r = journal_file_set_offline(s->system_journal); - 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); - 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, - JournalFile *f, - JournalMetrics *metrics, - const char *path, - const char *name, - bool verbose, - bool patch_min_use) { - - const char *p; - uint64_t limit; - int r; - - assert(s); - assert(metrics); - assert(path); - assert(name); - - if (!f) - return; - - p = strjoina(path, SERVER_MACHINE_ID(s)); - - limit = metrics->max_use; - (void) determine_space_for(s, metrics, path, name, verbose, patch_min_use, NULL, &limit); - - r = journal_directory_vacuum(p, limit, 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", p); -} - -int server_vacuum(Server *s, bool verbose, bool patch_min_use) { - assert(s); - - log_debug("Vacuuming..."); - - s->oldest_file_usec = 0; - - do_vacuum(s, s->system_journal, &s->system_metrics, "/var/log/journal/", "System journal", verbose, patch_min_use); - do_vacuum(s, s->runtime_journal, &s->runtime_metrics, "/run/log/journal/", "Runtime journal", verbose, patch_min_use); - - s->cached_space_limit = 0; - s->cached_space_available = 0; - s->cached_space_timestamp = 0; - - 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) { - - /* -E2BIG Hit configured limit - -EFBIG Hit fs limit - -EDQUOT Quota limit hit - -ENOSPC Disk full - -EIO I/O error of some kind (mmap) - -EHOSTDOWN Other machine - -EBUSY Unclean shutdown - -EPROTONOSUPPORT Unsupported feature - -EBADMSG Corrupted - -ENODATA Truncated - -ESHUTDOWN Already archived - -EIDRM Journal file has been deleted */ - - if (r == -E2BIG || r == -EFBIG || r == -EDQUOT || r == -ENOSPC) - log_debug("%s: Allocation limit reached, rotating.", f->path); - else if (r == -EHOSTDOWN) - log_info("%s: Journal file from other machine, rotating.", f->path); - else if (r == -EBUSY) - log_info("%s: Unclean shutdown, rotating.", f->path); - else if (r == -EPROTONOSUPPORT) - log_info("%s: Unsupported feature, rotating.", f->path); - else if (r == -EBADMSG || r == -ENODATA || r == ESHUTDOWN) - log_warning("%s: Journal file corrupted, rotating.", f->path); - else if (r == -EIO) - log_warning("%s: IO error, rotating.", f->path); - else if (r == -EIDRM) - log_warning("%s: Journal file has been deleted, rotating.", f->path); - else - return false; - - return true; -} - -static void write_to_journal(Server *s, uid_t uid, struct iovec *iovec, unsigned n, int priority) { - JournalFile *f; - bool vacuumed = false; - int r; - - assert(s); - assert(iovec); - assert(n > 0); - - 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); - server_rotate(s); - server_vacuum(s, false, false); - vacuumed = true; - - f = find_journal(s, uid); - if (!f) - return; - } - - r = journal_file_append_entry(f, 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 (%d items, %zu bytes), ignoring: %m", n, IOVEC_TOTAL_SIZE(iovec, n)); - return; - } - - server_rotate(s); - server_vacuum(s, false, false); - - f = find_journal(s, uid); - if (!f) - return; - - log_debug("Retrying write."); - r = journal_file_append_entry(f, NULL, iovec, n, &s->seqnum, NULL, NULL); - if (r < 0) - log_error_errno(r, "Failed to write entry (%d items, %zu bytes) despite vacuuming, ignoring: %m", n, IOVEC_TOTAL_SIZE(iovec, n)); - else - server_schedule_sync(s, priority); -} - -static void dispatch_message_real( - Server *s, - struct iovec *iovec, unsigned n, unsigned m, - const struct ucred *ucred, - const struct timeval *tv, - const char *label, size_t label_len, - const char *unit_id, - int priority, - pid_t object_pid) { - - char pid[sizeof("_PID=") + DECIMAL_STR_MAX(pid_t)], - uid[sizeof("_UID=") + DECIMAL_STR_MAX(uid_t)], - gid[sizeof("_GID=") + DECIMAL_STR_MAX(gid_t)], - owner_uid[sizeof("_SYSTEMD_OWNER_UID=") + DECIMAL_STR_MAX(uid_t)], - source_time[sizeof("_SOURCE_REALTIME_TIMESTAMP=") + DECIMAL_STR_MAX(usec_t)], - o_uid[sizeof("OBJECT_UID=") + DECIMAL_STR_MAX(uid_t)], - o_gid[sizeof("OBJECT_GID=") + DECIMAL_STR_MAX(gid_t)], - o_owner_uid[sizeof("OBJECT_SYSTEMD_OWNER_UID=") + DECIMAL_STR_MAX(uid_t)]; - uid_t object_uid; - gid_t object_gid; - char *x; - int r; - char *t, *c; - uid_t realuid = 0, owner = 0, journal_uid; - bool owner_valid = false; -#ifdef HAVE_AUDIT - char audit_session[sizeof("_AUDIT_SESSION=") + DECIMAL_STR_MAX(uint32_t)], - audit_loginuid[sizeof("_AUDIT_LOGINUID=") + DECIMAL_STR_MAX(uid_t)], - o_audit_session[sizeof("OBJECT_AUDIT_SESSION=") + DECIMAL_STR_MAX(uint32_t)], - o_audit_loginuid[sizeof("OBJECT_AUDIT_LOGINUID=") + DECIMAL_STR_MAX(uid_t)]; - - uint32_t audit; - uid_t loginuid; -#endif - - assert(s); - assert(iovec); - assert(n > 0); - assert(n + N_IOVEC_META_FIELDS + (object_pid ? N_IOVEC_OBJECT_FIELDS : 0) <= m); - - if (ucred) { - realuid = ucred->uid; - - sprintf(pid, "_PID="PID_FMT, ucred->pid); - IOVEC_SET_STRING(iovec[n++], pid); - - sprintf(uid, "_UID="UID_FMT, ucred->uid); - IOVEC_SET_STRING(iovec[n++], uid); - - sprintf(gid, "_GID="GID_FMT, ucred->gid); - IOVEC_SET_STRING(iovec[n++], gid); - - r = get_process_comm(ucred->pid, &t); - if (r >= 0) { - x = strjoina("_COMM=", t); - free(t); - IOVEC_SET_STRING(iovec[n++], x); - } - - r = get_process_exe(ucred->pid, &t); - if (r >= 0) { - x = strjoina("_EXE=", t); - free(t); - IOVEC_SET_STRING(iovec[n++], x); - } - - r = get_process_cmdline(ucred->pid, 0, false, &t); - if (r >= 0) { - x = strjoina("_CMDLINE=", t); - free(t); - IOVEC_SET_STRING(iovec[n++], x); - } - - r = get_process_capeff(ucred->pid, &t); - if (r >= 0) { - x = strjoina("_CAP_EFFECTIVE=", t); - free(t); - IOVEC_SET_STRING(iovec[n++], x); - } - -#ifdef HAVE_AUDIT - r = audit_session_from_pid(ucred->pid, &audit); - if (r >= 0) { - sprintf(audit_session, "_AUDIT_SESSION=%"PRIu32, audit); - IOVEC_SET_STRING(iovec[n++], audit_session); - } - - r = audit_loginuid_from_pid(ucred->pid, &loginuid); - if (r >= 0) { - sprintf(audit_loginuid, "_AUDIT_LOGINUID="UID_FMT, loginuid); - IOVEC_SET_STRING(iovec[n++], audit_loginuid); - } -#endif - - r = cg_pid_get_path_shifted(ucred->pid, s->cgroup_root, &c); - if (r >= 0) { - char *session = NULL; - - x = strjoina("_SYSTEMD_CGROUP=", c); - IOVEC_SET_STRING(iovec[n++], x); - - r = cg_path_get_session(c, &t); - if (r >= 0) { - session = strjoina("_SYSTEMD_SESSION=", t); - free(t); - IOVEC_SET_STRING(iovec[n++], session); - } - - if (cg_path_get_owner_uid(c, &owner) >= 0) { - owner_valid = true; - - sprintf(owner_uid, "_SYSTEMD_OWNER_UID="UID_FMT, owner); - IOVEC_SET_STRING(iovec[n++], owner_uid); - } - - if (cg_path_get_unit(c, &t) >= 0) { - x = strjoina("_SYSTEMD_UNIT=", t); - free(t); - IOVEC_SET_STRING(iovec[n++], x); - } else if (unit_id && !session) { - x = strjoina("_SYSTEMD_UNIT=", unit_id); - IOVEC_SET_STRING(iovec[n++], x); - } - - if (cg_path_get_user_unit(c, &t) >= 0) { - x = strjoina("_SYSTEMD_USER_UNIT=", t); - free(t); - IOVEC_SET_STRING(iovec[n++], x); - } else if (unit_id && session) { - x = strjoina("_SYSTEMD_USER_UNIT=", unit_id); - IOVEC_SET_STRING(iovec[n++], x); - } - - if (cg_path_get_slice(c, &t) >= 0) { - x = strjoina("_SYSTEMD_SLICE=", t); - free(t); - IOVEC_SET_STRING(iovec[n++], x); - } - - free(c); - } else if (unit_id) { - x = strjoina("_SYSTEMD_UNIT=", unit_id); - IOVEC_SET_STRING(iovec[n++], x); - } - -#ifdef HAVE_SELINUX - if (mac_selinux_have()) { - if (label) { - x = alloca(strlen("_SELINUX_CONTEXT=") + label_len + 1); - - *((char*) mempcpy(stpcpy(x, "_SELINUX_CONTEXT="), label, label_len)) = 0; - IOVEC_SET_STRING(iovec[n++], x); - } else { - security_context_t con; - - if (getpidcon(ucred->pid, &con) >= 0) { - x = strjoina("_SELINUX_CONTEXT=", con); - - freecon(con); - IOVEC_SET_STRING(iovec[n++], x); - } - } - } -#endif - } - assert(n <= m); - - if (object_pid) { - r = get_process_uid(object_pid, &object_uid); - if (r >= 0) { - sprintf(o_uid, "OBJECT_UID="UID_FMT, object_uid); - IOVEC_SET_STRING(iovec[n++], o_uid); - } - - r = get_process_gid(object_pid, &object_gid); - if (r >= 0) { - sprintf(o_gid, "OBJECT_GID="GID_FMT, object_gid); - IOVEC_SET_STRING(iovec[n++], o_gid); - } - - r = get_process_comm(object_pid, &t); - if (r >= 0) { - x = strjoina("OBJECT_COMM=", t); - free(t); - IOVEC_SET_STRING(iovec[n++], x); - } - - r = get_process_exe(object_pid, &t); - if (r >= 0) { - x = strjoina("OBJECT_EXE=", t); - free(t); - IOVEC_SET_STRING(iovec[n++], x); - } - - r = get_process_cmdline(object_pid, 0, false, &t); - if (r >= 0) { - x = strjoina("OBJECT_CMDLINE=", t); - free(t); - IOVEC_SET_STRING(iovec[n++], x); - } - -#ifdef HAVE_AUDIT - r = audit_session_from_pid(object_pid, &audit); - if (r >= 0) { - sprintf(o_audit_session, "OBJECT_AUDIT_SESSION=%"PRIu32, audit); - IOVEC_SET_STRING(iovec[n++], o_audit_session); - } - - r = audit_loginuid_from_pid(object_pid, &loginuid); - if (r >= 0) { - sprintf(o_audit_loginuid, "OBJECT_AUDIT_LOGINUID="UID_FMT, loginuid); - IOVEC_SET_STRING(iovec[n++], o_audit_loginuid); - } -#endif - - r = cg_pid_get_path_shifted(object_pid, s->cgroup_root, &c); - if (r >= 0) { - x = strjoina("OBJECT_SYSTEMD_CGROUP=", c); - IOVEC_SET_STRING(iovec[n++], x); - - r = cg_path_get_session(c, &t); - if (r >= 0) { - x = strjoina("OBJECT_SYSTEMD_SESSION=", t); - free(t); - IOVEC_SET_STRING(iovec[n++], x); - } - - if (cg_path_get_owner_uid(c, &owner) >= 0) { - sprintf(o_owner_uid, "OBJECT_SYSTEMD_OWNER_UID="UID_FMT, owner); - IOVEC_SET_STRING(iovec[n++], o_owner_uid); - } - - if (cg_path_get_unit(c, &t) >= 0) { - x = strjoina("OBJECT_SYSTEMD_UNIT=", t); - free(t); - IOVEC_SET_STRING(iovec[n++], x); - } - - if (cg_path_get_user_unit(c, &t) >= 0) { - x = strjoina("OBJECT_SYSTEMD_USER_UNIT=", t); - free(t); - IOVEC_SET_STRING(iovec[n++], x); - } - - free(c); - } - } - assert(n <= m); - - if (tv) { - sprintf(source_time, "_SOURCE_REALTIME_TIMESTAMP=%llu", (unsigned long long) timeval_load(tv)); - IOVEC_SET_STRING(iovec[n++], 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_SET_STRING(iovec[n++], s->boot_id_field); - - if (!isempty(s->machine_id_field)) - IOVEC_SET_STRING(iovec[n++], s->machine_id_field); - - if (!isempty(s->hostname_field)) - IOVEC_SET_STRING(iovec[n++], s->hostname_field); - - assert(n <= m); - - if (s->split_mode == SPLIT_UID && realuid > 0) - /* Split up strictly by any UID */ - journal_uid = realuid; - else if (s->split_mode == SPLIT_LOGIN && realuid > 0 && owner_valid && owner > 0) - /* 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 = owner; - else - journal_uid = 0; - - write_to_journal(s, journal_uid, iovec, n, priority); -} - -void server_driver_message(Server *s, sd_id128_t message_id, const char *format, ...) { - char mid[11 + 32 + 1]; - struct iovec iovec[N_IOVEC_META_FIELDS + 5 + N_IOVEC_PAYLOAD_FIELDS]; - unsigned n = 0, m; - int r; - va_list ap; - struct ucred ucred = {}; - - assert(s); - assert(format); - - assert_cc(3 == LOG_FAC(LOG_DAEMON)); - IOVEC_SET_STRING(iovec[n++], "SYSLOG_FACILITY=3"); - IOVEC_SET_STRING(iovec[n++], "SYSLOG_IDENTIFIER=systemd-journald"); - - IOVEC_SET_STRING(iovec[n++], "_TRANSPORT=driver"); - assert_cc(6 == LOG_INFO); - IOVEC_SET_STRING(iovec[n++], "PRIORITY=6"); - - if (!sd_id128_equal(message_id, SD_ID128_NULL)) { - snprintf(mid, sizeof(mid), LOG_MESSAGE_ID(message_id)); - IOVEC_SET_STRING(iovec[n++], mid); - } - - m = n; - - va_start(ap, format); - r = log_format_iovec(iovec, ELEMENTSOF(iovec), &n, false, 0, format, ap); - /* Error handling below */ - va_end(ap); - - ucred.pid = getpid(); - ucred.uid = getuid(); - ucred.gid = getgid(); - - if (r >= 0) - dispatch_message_real(s, iovec, n, ELEMENTSOF(iovec), &ucred, NULL, NULL, 0, NULL, LOG_INFO, 0); - - while (m < n) - free(iovec[m++].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_SET_STRING(iovec[n++], "PRIORITY=4"); - IOVEC_SET_STRING(iovec[n++], buf); - dispatch_message_real(s, iovec, n, ELEMENTSOF(iovec), &ucred, NULL, NULL, 0, NULL, LOG_INFO, 0); - } -} - -void server_dispatch_message( - Server *s, - struct iovec *iovec, unsigned n, unsigned m, - const struct ucred *ucred, - const struct timeval *tv, - const char *label, size_t label_len, - const char *unit_id, - int priority, - pid_t object_pid) { - - int rl, r; - _cleanup_free_ char *path = NULL; - uint64_t available = 0; - char *c; - - 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 (!ucred) - goto finish; - - r = cg_pid_get_path_shifted(ucred->pid, s->cgroup_root, &path); - if (r < 0) - goto finish; - - /* example: /user/lennart/3/foobar - * /system/dbus.service/foobar - * - * So let's cut of everything past the third /, since that is - * where user directories start */ - - c = strchr(path, '/'); - if (c) { - c = strchr(c+1, '/'); - if (c) { - c = strchr(c+1, '/'); - if (c) - *c = 0; - } - } - - (void) determine_space(s, false, false, &available, NULL); - rl = journal_rate_limit_test(s->rate_limit, path, priority & LOG_PRIMASK, available); - if (rl == 0) - return; - - /* Write a suppression message if we suppressed something */ - if (rl > 1) - server_driver_message(s, SD_MESSAGE_JOURNAL_DROPPED, - LOG_MESSAGE("Suppressed %u messages from %s", rl - 1, path), - NULL); - -finish: - dispatch_message_real(s, iovec, n, m, ucred, tv, label, label_len, unit_id, priority, object_pid); -} - - -static int system_journal_open(Server *s, bool flush_requested) { - const char *fn; - int r = 0; - - if (!s->system_journal && - (s->storage == STORAGE_PERSISTENT || s->storage == STORAGE_AUTO) && - (flush_requested - || access("/run/systemd/journal/flushed", F_OK) >= 0)) { - - /* 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); - - fn = strjoina("/var/log/journal/", SERVER_MACHINE_ID(s)); - (void) mkdir(fn, 0755); - - fn = strjoina(fn, "/system.journal"); - r = open_journal(s, true, fn, O_RDWR|O_CREAT, s->seal, &s->system_metrics, &s->system_journal); - if (r >= 0) { - server_add_acls(s->system_journal, 0); - (void) determine_space_for(s, &s->system_metrics, "/var/log/journal/", "System journal", true, true, NULL, NULL); - } else if (r < 0) { - if (r != -ENOENT && r != -EROFS) - log_warning_errno(r, "Failed to open system journal: %m"); - - r = 0; - } - } - - if (!s->runtime_journal && - (s->storage != STORAGE_NONE)) { - - fn = strjoina("/run/log/journal/", SERVER_MACHINE_ID(s), "/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_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_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) determine_space_for(s, &s->runtime_metrics, "/run/log/journal/", "Runtime journal", true, true, NULL, NULL); - } - } - - return r; -} - -int server_flush_to_var(Server *s) { - sd_id128_t machine; - sd_journal *j = NULL; - char ts[FORMAT_TIMESPAN_MAX]; - usec_t start; - unsigned n = 0; - int r; - - assert(s); - - if (s->storage != STORAGE_AUTO && - s->storage != STORAGE_PERSISTENT) - return 0; - - if (!s->runtime_journal) - 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, NULL, NULL, NULL); - 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, 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, NULL, NULL, NULL); - 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, SD_ID128_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; - unsigned 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 (errno == EINTR || errno == 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, strstrip(s->buffer), 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); - - server_flush_to_var(s); - server_sync(s); - server_vacuum(s, false, false); - - r = touch("/run/systemd/journal/flushed"); - if (r < 0) - log_warning_errno(r, "Failed to touch /run/systemd/journal/flushed, ignoring: %m"); - - 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, true); - - /* 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(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 server_parse_proc_cmdline(Server *s) { - _cleanup_free_ char *line = NULL; - const char *p; - int r; - - r = proc_cmdline(&line); - if (r < 0) { - log_warning_errno(r, "Failed to read /proc/cmdline, ignoring: %m"); - return 0; - } - - p = line; - for(;;) { - _cleanup_free_ char *word = NULL; - - r = extract_first_word(&p, &word, NULL, 0); - if (r < 0) - return log_error_errno(r, "Failed to parse journald syntax \"%s\": %m", line); - - if (r == 0) - break; - - if (startswith(word, "systemd.journald.forward_to_syslog=")) { - r = parse_boolean(word + 35); - if (r < 0) - log_warning("Failed to parse forward to syslog switch %s. Ignoring.", word + 35); - else - s->forward_to_syslog = r; - } else if (startswith(word, "systemd.journald.forward_to_kmsg=")) { - r = parse_boolean(word + 33); - if (r < 0) - log_warning("Failed to parse forward to kmsg switch %s. Ignoring.", word + 33); - else - s->forward_to_kmsg = r; - } else if (startswith(word, "systemd.journald.forward_to_console=")) { - r = parse_boolean(word + 36); - if (r < 0) - log_warning("Failed to parse forward to console switch %s. Ignoring.", word + 36); - else - s->forward_to_console = r; - } else if (startswith(word, "systemd.journald.forward_to_wall=")) { - r = parse_boolean(word + 33); - if (r < 0) - log_warning("Failed to parse forward to wall switch %s. Ignoring.", word + 33); - else - s->forward_to_wall = r; - } else if (startswith(word, "systemd.journald")) - log_warning("Invalid systemd.journald parameter. Ignoring."); - } - - /* 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(PKGSYSCONFDIR "/journald.conf", - CONF_PATHS_NULSTR("systemd/journald.conf.d"), - "Journal\0", - config_item_perf_lookup, journald_gperf_lookup, - false, 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_NDELAY|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 wtachdog 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 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 ((e[0] != '@' && 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, offsetof(struct sockaddr_un, sun_path) + strlen(e)); - 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 = true; - s->seal = 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; - - journal_reset_metrics(&s->system_metrics); - journal_reset_metrics(&s->runtime_metrics); - - server_parse_config_file(s); - server_parse_proc_cmdline(s); - - 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(); - - 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/ksmg */ - 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); - - (void) server_connect_notify(s); - - return system_journal_open(s, false); -} - -void server_maybe_append_tags(Server *s) { -#ifdef 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) { - JournalFile *f; - assert(s); - - while (s->stdout_streams) - stdout_stream_free(s->stdout_streams); - - if (s->system_journal) - journal_file_close(s->system_journal); - - if (s->runtime_journal) - journal_file_close(s->runtime_journal); - - while ((f = ordered_hashmap_steal_first(s->user_journals))) - journal_file_close(f); - - ordered_hashmap_free(s->user_journals); - - 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); - - 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"); |