| /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
| |
| /*** |
| 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/>. |
| ***/ |
| |
| #include <sys/signalfd.h> |
| #include <sys/ioctl.h> |
| #include <linux/sockios.h> |
| #include <sys/statvfs.h> |
| #include <sys/mman.h> |
| #include <sys/timerfd.h> |
| |
| #include <libudev.h> |
| |
| #include "sd-journal.h" |
| #include "sd-messages.h" |
| #include "sd-daemon.h" |
| #include "fileio.h" |
| #include "mkdir.h" |
| #include "hashmap.h" |
| #include "journal-file.h" |
| #include "socket-util.h" |
| #include "cgroup-util.h" |
| #include "list.h" |
| #include "missing.h" |
| #include "conf-parser.h" |
| #include "selinux-util.h" |
| #include "journal-internal.h" |
| #include "journal-vacuum.h" |
| #include "journal-authenticate.h" |
| #include "journald-rate-limit.h" |
| #include "journald-kmsg.h" |
| #include "journald-syslog.h" |
| #include "journald-stream.h" |
| #include "journald-console.h" |
| #include "journald-native.h" |
| #include "journald-server.h" |
| |
| #ifdef HAVE_ACL |
| #include <sys/acl.h> |
| #include <acl/libacl.h> |
| #include "acl-util.h" |
| #endif |
| |
| #ifdef HAVE_SELINUX |
| #include <selinux/selinux.h> |
| #endif |
| |
| #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_AVAILABLE_SPACE_USEC (30*USEC_PER_SEC) |
| |
| 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"); |
| |
| static uint64_t available_space(Server *s, bool verbose) { |
| char ids[33]; |
| _cleanup_free_ char *p = NULL; |
| sd_id128_t machine; |
| struct statvfs ss; |
| uint64_t sum = 0, ss_avail = 0, avail = 0; |
| int r; |
| _cleanup_closedir_ DIR *d = NULL; |
| usec_t ts; |
| const char *f; |
| JournalMetrics *m; |
| |
| ts = now(CLOCK_MONOTONIC); |
| |
| if (s->cached_available_space_timestamp + RECHECK_AVAILABLE_SPACE_USEC > ts |
| && !verbose) |
| return s->cached_available_space; |
| |
| r = sd_id128_get_machine(&machine); |
| if (r < 0) |
| return 0; |
| |
| if (s->system_journal) { |
| f = "/var/log/journal/"; |
| m = &s->system_metrics; |
| } else { |
| f = "/run/log/journal/"; |
| m = &s->runtime_metrics; |
| } |
| |
| assert(m); |
| |
| p = strappend(f, sd_id128_to_string(machine, ids)); |
| if (!p) |
| return 0; |
| |
| d = opendir(p); |
| if (!d) |
| return 0; |
| |
| if (fstatvfs(dirfd(d), &ss) < 0) |
| return 0; |
| |
| for (;;) { |
| struct stat st; |
| struct dirent *de; |
| |
| errno = 0; |
| de = readdir(d); |
| if (!de && errno != 0) |
| return 0; |
| |
| if (!de) |
| break; |
| |
| if (!endswith(de->d_name, ".journal") && |
| !endswith(de->d_name, ".journal~")) |
| continue; |
| |
| if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) |
| continue; |
| |
| if (!S_ISREG(st.st_mode)) |
| continue; |
| |
| sum += (uint64_t) st.st_blocks * 512UL; |
| } |
| |
| ss_avail = ss.f_bsize * ss.f_bavail; |
| |
| /* If we reached a high mark, we will always allow this much |
| * again, unless usage goes above max_use. This watermark |
| * value is cached so that we don't give up space on pressure, |
| * but hover below the maximum usage. */ |
| |
| if (m->use < sum) |
| m->use = sum; |
| |
| avail = LESS_BY(ss_avail, m->keep_free); |
| |
| s->cached_available_space = LESS_BY(MIN(m->max_use, avail), sum); |
| s->cached_available_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]; |
| |
| server_driver_message(s, SD_MESSAGE_JOURNAL_USAGE, |
| "%s journal is using %s (max allowed %s, " |
| "trying to leave %s free of %s available → current limit %s).", |
| s->system_journal ? "Permanent" : "Runtime", |
| format_bytes(fb1, sizeof(fb1), sum), |
| format_bytes(fb2, sizeof(fb2), m->max_use), |
| format_bytes(fb3, sizeof(fb3), m->keep_free), |
| format_bytes(fb4, sizeof(fb4), ss_avail), |
| format_bytes(fb5, sizeof(fb5), s->cached_available_space + sum)); |
| } |
| |
| return s->cached_available_space; |
| } |
| |
| void server_fix_perms(Server *s, JournalFile *f, uid_t uid) { |
| int r; |
| #ifdef HAVE_ACL |
| acl_t acl; |
| acl_entry_t entry; |
| acl_permset_t permset; |
| #endif |
| |
| assert(f); |
| |
| r = fchmod(f->fd, 0640); |
| if (r < 0) |
| log_warning("Failed to fix access mode on %s, ignoring: %s", f->path, strerror(-r)); |
| |
| #ifdef HAVE_ACL |
| if (uid <= SYSTEM_UID_MAX) |
| return; |
| |
| acl = acl_get_fd(f->fd); |
| if (!acl) { |
| log_warning("Failed to read ACL on %s, ignoring: %m", f->path); |
| return; |
| } |
| |
| r = acl_find_uid(acl, uid, &entry); |
| if (r <= 0) { |
| |
| if (acl_create_entry(&acl, &entry) < 0 || |
| acl_set_tag_type(entry, ACL_USER) < 0 || |
| acl_set_qualifier(entry, &uid) < 0) { |
| log_warning("Failed to patch ACL on %s, ignoring: %m", f->path); |
| goto finish; |
| } |
| } |
| |
| /* We do not recalculate the mask unconditionally here, |
| * so that the fchmod() mask above stays intact. */ |
| if (acl_get_permset(entry, &permset) < 0 || |
| acl_add_perm(permset, ACL_READ) < 0 || |
| calc_acl_mask_if_needed(&acl) < 0) { |
| log_warning("Failed to patch ACL on %s, ignoring: %m", f->path); |
| goto finish; |
| } |
| |
| if (acl_set_fd(f->fd, acl) < 0) |
| log_warning("Failed to set ACL on %s, ignoring: %m", f->path); |
| |
| finish: |
| acl_free(acl); |
| #endif |
| } |
| |
| 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 = hashmap_get(s->user_journals, UINT32_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 (hashmap_size(s->user_journals) >= USER_JOURNALS_MAX) { |
| /* Too many open? Then let's close one */ |
| f = hashmap_steal_first(s->user_journals); |
| assert(f); |
| journal_file_close(f); |
| } |
| |
| r = journal_file_open_reliably(p, O_RDWR|O_CREAT, 0640, s->compress, s->seal, &s->system_metrics, s->mmap, NULL, &f); |
| if (r < 0) |
| return s->system_journal; |
| |
| server_fix_perms(s, f, uid); |
| |
| r = hashmap_put(s->user_journals, UINT32_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("Failed to rotate %s: %s", |
| (*f)->path, strerror(-r)); |
| else |
| log_error("Failed to create new %s journal: %s", |
| name, strerror(-r)); |
| else |
| server_fix_perms(s, *f, uid); |
| return r; |
| } |
| |
| void server_rotate(Server *s) { |
| JournalFile *f; |
| void *k; |
| Iterator i; |
| int r; |
| |
| log_debug("Rotating..."); |
| |
| do_rotate(s, &s->runtime_journal, "runtime", false, 0); |
| do_rotate(s, &s->system_journal, "system", s->seal, 0); |
| |
| HASHMAP_FOREACH_KEY(f, k, s->user_journals, i) { |
| r = do_rotate(s, &f, "user", s->seal, PTR_TO_UINT32(k)); |
| if (r >= 0) |
| hashmap_replace(s->user_journals, k, f); |
| else if (!f) |
| /* Old file has been closed and deallocated */ |
| hashmap_remove(s->user_journals, k); |
| } |
| } |
| |
| void server_sync(Server *s) { |
| JournalFile *f; |
| void *k; |
| Iterator i; |
| int r; |
| |
| if (s->system_journal) { |
| r = journal_file_set_offline(s->system_journal); |
| if (r < 0) |
| log_error("Failed to sync system journal: %s", strerror(-r)); |
| } |
| |
| HASHMAP_FOREACH_KEY(f, k, s->user_journals, i) { |
| r = journal_file_set_offline(f); |
| if (r < 0) |
| log_error("Failed to sync user journal: %s", strerror(-r)); |
| } |
| |
| if (s->sync_event_source) { |
| r = sd_event_source_set_enabled(s->sync_event_source, SD_EVENT_OFF); |
| if (r < 0) |
| log_error("Failed to disable sync timer source: %s", strerror(-r)); |
| } |
| |
| s->sync_scheduled = false; |
| } |
| |
| static void do_vacuum(Server *s, char *ids, JournalFile *f, const char* path, |
| JournalMetrics *metrics) { |
| char *p; |
| int r; |
| |
| if (!f) |
| return; |
| |
| p = strappenda(path, ids); |
| r = journal_directory_vacuum(p, metrics->max_use, s->max_retention_usec, &s->oldest_file_usec); |
| if (r < 0 && r != -ENOENT) |
| log_error("Failed to vacuum %s: %s", p, strerror(-r)); |
| } |
| |
| void server_vacuum(Server *s) { |
| char ids[33]; |
| sd_id128_t machine; |
| int r; |
| |
| log_debug("Vacuuming..."); |
| |
| s->oldest_file_usec = 0; |
| |
| r = sd_id128_get_machine(&machine); |
| if (r < 0) { |
| log_error("Failed to get machine ID: %s", strerror(-r)); |
| return; |
| } |
| sd_id128_to_string(machine, ids); |
| |
| do_vacuum(s, ids, s->system_journal, "/var/log/journal/", &s->system_metrics); |
| do_vacuum(s, ids, s->runtime_journal, "/run/log/journal/", &s->runtime_metrics); |
| |
| s->cached_available_space_timestamp = 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; |
| } |
| |
| bool shall_try_append_again(JournalFile *f, int r) { |
| |
| /* -E2BIG Hit configured limit |
| -EFBIG Hit fs limit |
| -EDQUOT Quota limit hit |
| -ENOSPC Disk full |
| -EHOSTDOWN Other machine |
| -EBUSY Unclean shutdown |
| -EPROTONOSUPPORT Unsupported feature |
| -EBADMSG Corrupted |
| -ENODATA Truncated |
| -ESHUTDOWN Already archived */ |
| |
| 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 |
| 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); |
| 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)) { |
| size_t size = 0; |
| unsigned i; |
| for (i = 0; i < n; i++) |
| size += iovec[i].iov_len; |
| |
| log_error("Failed to write entry (%d items, %zu bytes), ignoring: %s", n, size, strerror(-r)); |
| return; |
| } |
| |
| server_rotate(s); |
| server_vacuum(s); |
| |
| 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) { |
| size_t size = 0; |
| unsigned i; |
| for (i = 0; i < n; i++) |
| size += iovec[i].iov_len; |
| |
| log_error("Failed to write entry (%d items, %zu bytes) despite vacuuming, ignoring: %s", n, size, strerror(-r)); |
| } else |
| server_schedule_sync(s, priority); |
| } |
| |
| static void dispatch_message_real( |
| Server *s, |
| struct iovec *iovec, unsigned n, unsigned m, |
| struct ucred *ucred, |
| 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 = strappenda("_COMM=", t); |
| free(t); |
| IOVEC_SET_STRING(iovec[n++], x); |
| } |
| |
| r = get_process_exe(ucred->pid, &t); |
| if (r >= 0) { |
| x = strappenda("_EXE=", t); |
| free(t); |
| IOVEC_SET_STRING(iovec[n++], x); |
| } |
| |
| r = get_process_cmdline(ucred->pid, 0, false, &t); |
| if (r >= 0) { |
| x = strappenda("_CMDLINE=", t); |
| free(t); |
| IOVEC_SET_STRING(iovec[n++], x); |
| } |
| |
| r = get_process_capeff(ucred->pid, &t); |
| if (r >= 0) { |
| x = strappenda("_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 = strappenda("_SYSTEMD_CGROUP=", c); |
| IOVEC_SET_STRING(iovec[n++], x); |
| |
| r = cg_path_get_session(c, &t); |
| if (r >= 0) { |
| session = strappenda("_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 = strappenda("_SYSTEMD_UNIT=", t); |
| free(t); |
| IOVEC_SET_STRING(iovec[n++], x); |
| } else if (unit_id && !session) { |
| x = strappenda("_SYSTEMD_UNIT=", unit_id); |
| IOVEC_SET_STRING(iovec[n++], x); |
| } |
| |
| if (cg_path_get_user_unit(c, &t) >= 0) { |
| x = strappenda("_SYSTEMD_USER_UNIT=", t); |
| free(t); |
| IOVEC_SET_STRING(iovec[n++], x); |
| } else if (unit_id && session) { |
| x = strappenda("_SYSTEMD_USER_UNIT=", unit_id); |
| IOVEC_SET_STRING(iovec[n++], x); |
| } |
| |
| if (cg_path_get_slice(c, &t) >= 0) { |
| x = strappenda("_SYSTEMD_SLICE=", t); |
| free(t); |
| IOVEC_SET_STRING(iovec[n++], x); |
| } |
| |
| free(c); |
| } else if (unit_id) { |
| x = strappenda("_SYSTEMD_UNIT=", unit_id); |
| IOVEC_SET_STRING(iovec[n++], x); |
| } |
| |
| #ifdef HAVE_SELINUX |
| if (use_selinux()) { |
| 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 = strappenda("_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 = strappenda("OBJECT_COMM=", t); |
| free(t); |
| IOVEC_SET_STRING(iovec[n++], x); |
| } |
| |
| r = get_process_exe(object_pid, &t); |
| if (r >= 0) { |
| x = strappenda("OBJECT_EXE=", t); |
| free(t); |
| IOVEC_SET_STRING(iovec[n++], x); |
| } |
| |
| r = get_process_cmdline(object_pid, 0, false, &t); |
| if (r >= 0) { |
| x = strappenda("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 = strappenda("OBJECT_SYSTEMD_CGROUP=", c); |
| IOVEC_SET_STRING(iovec[n++], x); |
| |
| r = cg_path_get_session(c, &t); |
| if (r >= 0) { |
| x = strappenda("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 = strappenda("OBJECT_SYSTEMD_UNIT=", t); |
| free(t); |
| IOVEC_SET_STRING(iovec[n++], x); |
| } |
| |
| if (cg_path_get_user_unit(c, &t) >= 0) { |
| x = strappenda("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]; |
| char buffer[16 + LINE_MAX + 1]; |
| struct iovec iovec[N_IOVEC_META_FIELDS + 4]; |
| int n = 0; |
| va_list ap; |
| struct ucred ucred = {}; |
| |
| assert(s); |
| assert(format); |
| |
| IOVEC_SET_STRING(iovec[n++], "PRIORITY=6"); |
| IOVEC_SET_STRING(iovec[n++], "_TRANSPORT=driver"); |
| |
| memcpy(buffer, "MESSAGE=", 8); |
| va_start(ap, format); |
| vsnprintf(buffer + 8, sizeof(buffer) - 8, format, ap); |
| va_end(ap); |
| char_array_0(buffer); |
| IOVEC_SET_STRING(iovec[n++], buffer); |
| |
| if (!sd_id128_equal(message_id, SD_ID128_NULL)) { |
| snprintf(mid, sizeof(mid), MESSAGE_ID(message_id)); |
| char_array_0(mid); |
| IOVEC_SET_STRING(iovec[n++], mid); |
| } |
| |
| ucred.pid = getpid(); |
| ucred.uid = getuid(); |
| ucred.gid = getgid(); |
| |
| 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, |
| struct ucred *ucred, |
| 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; |
| 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; |
| } |
| } |
| |
| rl = journal_rate_limit_test(s->rate_limit, path, |
| priority & LOG_PRIMASK, available_space(s, false)); |
| |
| if (rl == 0) |
| return; |
| |
| /* Write a suppression message if we suppressed something */ |
| if (rl > 1) |
| server_driver_message(s, SD_MESSAGE_JOURNAL_DROPPED, |
| "Suppressed %u messages from %s", rl - 1, path); |
| |
| 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) { |
| int r; |
| char *fn; |
| sd_id128_t machine; |
| char ids[33]; |
| |
| r = sd_id128_get_machine(&machine); |
| if (r < 0) { |
| log_error("Failed to get machine id: %s", strerror(-r)); |
| return r; |
| } |
| |
| sd_id128_to_string(machine, ids); |
| |
| if (!s->system_journal && |
| (s->storage == STORAGE_PERSISTENT || s->storage == STORAGE_AUTO) && |
| 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("/var/log/journal/", 0755); |
| |
| fn = strappenda("/var/log/journal/", ids); |
| (void) mkdir(fn, 0755); |
| |
| fn = strappenda(fn, "/system.journal"); |
| r = journal_file_open_reliably(fn, O_RDWR|O_CREAT, 0640, s->compress, s->seal, &s->system_metrics, s->mmap, NULL, &s->system_journal); |
| |
| if (r >= 0) |
| server_fix_perms(s, s->system_journal, 0); |
| else if (r < 0) { |
| if (r != -ENOENT && r != -EROFS) |
| log_warning("Failed to open system journal: %s", strerror(-r)); |
| |
| r = 0; |
| } |
| } |
| |
| if (!s->runtime_journal && |
| (s->storage != STORAGE_NONE)) { |
| |
| fn = strjoin("/run/log/journal/", ids, "/system.journal", NULL); |
| if (!fn) |
| return -ENOMEM; |
| |
| 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 = journal_file_open(fn, O_RDWR, 0640, s->compress, false, &s->runtime_metrics, s->mmap, NULL, &s->runtime_journal); |
| free(fn); |
| |
| if (r < 0) { |
| if (r != -ENOENT) |
| log_warning("Failed to open runtime journal: %s", strerror(-r)); |
| |
| 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 = journal_file_open_reliably(fn, O_RDWR|O_CREAT, 0640, s->compress, false, &s->runtime_metrics, s->mmap, NULL, &s->runtime_journal); |
| free(fn); |
| |
| if (r < 0) { |
| log_error("Failed to open runtime journal: %s", strerror(-r)); |
| return r; |
| } |
| } |
| |
| if (s->runtime_journal) |
| server_fix_perms(s, s->runtime_journal, 0); |
| } |
| |
| available_space(s, true); |
| |
| 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; |
| |
| system_journal_open(s); |
| |
| 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) { |
| log_error("Failed to read runtime journal: %s", strerror(-r)); |
| return r; |
| } |
| |
| 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("Can't read entry: %s", strerror(-r)); |
| 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("Can't write entry: %s", strerror(-r)); |
| goto finish; |
| } |
| |
| server_rotate(s); |
| server_vacuum(s); |
| |
| 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("Can't write entry: %s", strerror(-r)); |
| goto finish; |
| } |
| } |
| |
| finish: |
| journal_file_post_change(s->system_journal); |
| |
| journal_file_close(s->runtime_journal); |
| s->runtime_journal = NULL; |
| |
| if (r >= 0) |
| rm_rf("/run/log/journal", false, true, false); |
| |
| sd_journal_close(j); |
| |
| server_driver_message(s, SD_ID128_NULL, "Time spent on flushing to /var is %s for %u entries.", format_timespan(ts, sizeof(ts), now(CLOCK_MONOTONIC) - start, 0), n); |
| |
| return r; |
| } |
| |
| int process_datagram(sd_event_source *es, int fd, uint32_t revents, void *userdata) { |
| Server *s = userdata; |
| |
| assert(s); |
| assert(fd == s->native_fd || fd == s->syslog_fd); |
| |
| if (revents != EPOLLIN) { |
| log_error("Got invalid event from epoll for datagram fd: %"PRIx32, revents); |
| return -EIO; |
| } |
| |
| for (;;) { |
| struct ucred *ucred = NULL; |
| struct timeval *tv = NULL; |
| struct cmsghdr *cmsg; |
| char *label = NULL; |
| size_t label_len = 0; |
| struct iovec iovec; |
| |
| 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 = {}; |
| struct msghdr msghdr = { |
| .msg_iov = &iovec, |
| .msg_iovlen = 1, |
| .msg_control = &control, |
| .msg_controllen = sizeof(control), |
| }; |
| |
| ssize_t n; |
| int v; |
| int *fds = NULL; |
| unsigned n_fds = 0; |
| |
| if (ioctl(fd, SIOCINQ, &v) < 0) { |
| log_error("SIOCINQ failed: %m"); |
| return -errno; |
| } |
| |
| if (!GREEDY_REALLOC(s->buffer, s->buffer_size, LINE_MAX + (size_t) v)) |
| return log_oom(); |
| |
| iovec.iov_base = s->buffer; |
| iovec.iov_len = s->buffer_size; |
| |
| n = recvmsg(fd, &msghdr, MSG_DONTWAIT|MSG_CMSG_CLOEXEC); |
| if (n < 0) { |
| if (errno == EINTR || errno == EAGAIN) |
| return 0; |
| |
| log_error("recvmsg() failed: %m"); |
| return -errno; |
| } |
| |
| for (cmsg = CMSG_FIRSTHDR(&msghdr); cmsg; cmsg = CMSG_NXTHDR(&msghdr, cmsg)) { |
| |
| 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); |
| } |
| } |
| |
| if (fd == s->syslog_fd) { |
| if (n > 0 && n_fds == 0) { |
| s->buffer[n] = 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 (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."); |
| } |
| |
| close_many(fds, n_fds); |
| } |
| } |
| |
| static int dispatch_sigusr1(sd_event_source *es, const struct signalfd_siginfo *si, void *userdata) { |
| Server *s = userdata; |
| |
| assert(s); |
| |
| log_info("Received request to flush runtime journal from PID %"PRIu32, si->ssi_pid); |
| |
| touch("/run/systemd/journal/flushed"); |
| server_flush_to_var(s); |
| server_sync(s); |
| |
| return 0; |
| } |
| |
| static int dispatch_sigusr2(sd_event_source *es, const struct signalfd_siginfo *si, void *userdata) { |
| Server *s = userdata; |
| |
| assert(s); |
| |
| log_info("Received request to rotate journal from PID %"PRIu32, si->ssi_pid); |
| server_rotate(s); |
| server_vacuum(s); |
| |
| 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 setup_signals(Server *s) { |
| sigset_t mask; |
| int r; |
| |
| assert(s); |
| |
| assert_se(sigemptyset(&mask) == 0); |
| sigset_add_many(&mask, SIGINT, SIGTERM, SIGUSR1, SIGUSR2, -1); |
| assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 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; |
| |
| r = sd_event_add_signal(s->event, &s->sigint_event_source, SIGINT, dispatch_sigterm, s); |
| if (r < 0) |
| return r; |
| |
| return 0; |
| } |
| |
| static int server_parse_proc_cmdline(Server *s) { |
| _cleanup_free_ char *line = NULL; |
| const char *w, *state; |
| size_t l; |
| int r; |
| |
| r = proc_cmdline(&line); |
| if (r < 0) |
| log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r)); |
| if (r <= 0) |
| return 0; |
| |
| FOREACH_WORD_QUOTED(w, l, line, state) { |
| _cleanup_free_ char *word; |
| |
| word = strndup(w, l); |
| if (!word) |
| return -ENOMEM; |
| |
| 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(NULL, "/etc/systemd/journald.conf", NULL, |
| "Journal\0", |
| config_item_perf_lookup, journald_gperf_lookup, |
| false, false, true, 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) { |
| log_error("Failed to open /proc/sys/kernel/hostname: %m"); |
| return -errno; |
| } |
| |
| 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("Failed to register hostname fd in event loop: %s. Ignoring.", |
| strerror(-r)); |
| s->hostname_fd = safe_close(s->hostname_fd); |
| return 0; |
| } |
| |
| log_error("Failed to register hostname fd in event loop: %s", strerror(-r)); |
| return r; |
| } |
| |
| r = sd_event_source_set_priority(s->hostname_event_source, SD_EVENT_PRIORITY_IMPORTANT-10); |
| if (r < 0) { |
| log_error("Failed to adjust priority of host name event source: %s", strerror(-r)); |
| return r; |
| } |
| |
| return 0; |
| } |
| |
| int server_init(Server *s) { |
| int n, r, fd; |
| |
| assert(s); |
| |
| zero(*s); |
| s->syslog_fd = s->native_fd = s->stdout_fd = s->dev_kmsg_fd = s->hostname_fd = -1; |
| s->compress = true; |
| s->seal = true; |
| |
| 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; |
| |
| memset(&s->system_metrics, 0xFF, sizeof(s->system_metrics)); |
| memset(&s->runtime_metrics, 0xFF, sizeof(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 %llu,%u to 0,0", |
| (long long unsigned) s->rate_limit_interval, |
| s->rate_limit_burst); |
| s->rate_limit_interval = s->rate_limit_burst = 0; |
| } |
| |
| mkdir_p("/run/systemd/journal", 0755); |
| |
| s->user_journals = hashmap_new(trivial_hash_func, trivial_compare_func); |
| 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) { |
| log_error("Failed to create event loop: %s", strerror(-r)); |
| return r; |
| } |
| |
| sd_event_set_watchdog(s->event, true); |
| |
| n = sd_listen_fds(true); |
| if (n < 0) { |
| log_error("Failed to read listening file descriptors from environment: %s", strerror(-n)); |
| return n; |
| } |
| |
| 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 { |
| log_error("Unknown socket passed."); |
| return -EINVAL; |
| } |
| } |
| |
| r = server_open_syslog_socket(s); |
| if (r < 0) |
| return r; |
| |
| r = server_open_native_socket(s); |
| if (r < 0) |
| return r; |
| |
| r = server_open_stdout_socket(s); |
| if (r < 0) |
| return r; |
| |
| r = server_open_dev_kmsg(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); |
| |
| r = system_journal_open(s); |
| if (r < 0) |
| return r; |
| |
| return 0; |
| } |
| |
| 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); |
| |
| 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 = hashmap_steal_first(s->user_journals))) |
| journal_file_close(f); |
| |
| 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->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->hostname_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->hostname_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); |
| |
| if (s->mmap) |
| mmap_cache_unref(s->mmap); |
| |
| if (s->udev) |
| udev_unref(s->udev); |
| } |