diff options
Diffstat (limited to 'src/journal')
| -rw-r--r-- | src/journal/journald-console.c | 2 | ||||
| -rw-r--r-- | src/journal/journald-console.h | 2 | ||||
| -rw-r--r-- | src/journal/journald-gperf.gperf | 2 | ||||
| -rw-r--r-- | src/journal/journald-kmsg.c | 2 | ||||
| -rw-r--r-- | src/journal/journald-kmsg.h | 2 | ||||
| -rw-r--r-- | src/journal/journald-native.c | 2 | ||||
| -rw-r--r-- | src/journal/journald-native.h | 2 | ||||
| -rw-r--r-- | src/journal/journald-server.c | 1502 | ||||
| -rw-r--r-- | src/journal/journald-server.h (renamed from src/journal/journald.h) | 11 | ||||
| -rw-r--r-- | src/journal/journald-stream.c | 2 | ||||
| -rw-r--r-- | src/journal/journald-stream.h | 2 | ||||
| -rw-r--r-- | src/journal/journald-syslog.c | 2 | ||||
| -rw-r--r-- | src/journal/journald-syslog.h | 2 | ||||
| -rw-r--r-- | src/journal/journald.c | 1476 |
14 files changed, 1525 insertions, 1486 deletions
diff --git a/src/journal/journald-console.c b/src/journal/journald-console.c index 2596d44705..be55f94878 100644 --- a/src/journal/journald-console.c +++ b/src/journal/journald-console.c @@ -23,7 +23,7 @@ #include <unistd.h> #include <sys/socket.h> -#include "journald.h" +#include "journald-server.h" #include "journald-console.h" void server_forward_console( diff --git a/src/journal/journald-console.h b/src/journal/journald-console.h index 068cc5b86b..aa8e6579ba 100644 --- a/src/journal/journald-console.h +++ b/src/journal/journald-console.h @@ -21,6 +21,6 @@ along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ -#include "journald.h" +#include "journald-server.h" void server_forward_console(Server *s, int priority, const char *identifier, const char *message, struct ucred *ucred); diff --git a/src/journal/journald-gperf.gperf b/src/journal/journald-gperf.gperf index f616be3712..1baef1411c 100644 --- a/src/journal/journald-gperf.gperf +++ b/src/journal/journald-gperf.gperf @@ -2,7 +2,7 @@ #include <stddef.h> #include <sys/socket.h> #include "conf-parser.h" -#include "journald.h" +#include "journald-server.h" %} struct ConfigPerfItem; %null_strings diff --git a/src/journal/journald-kmsg.c b/src/journal/journald-kmsg.c index 86786cef55..b8198760d6 100644 --- a/src/journal/journald-kmsg.c +++ b/src/journal/journald-kmsg.c @@ -28,7 +28,7 @@ #include <systemd/sd-messages.h> #include <libudev.h> -#include "journald.h" +#include "journald-server.h" #include "journald-kmsg.h" #include "journald-syslog.h" diff --git a/src/journal/journald-kmsg.h b/src/journal/journald-kmsg.h index 0ebbaff752..f287161329 100644 --- a/src/journal/journald-kmsg.h +++ b/src/journal/journald-kmsg.h @@ -21,7 +21,7 @@ along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ -#include "journald.h" +#include "journald-server.h" int server_open_dev_kmsg(Server *s); int server_read_dev_kmsg(Server *s); diff --git a/src/journal/journald-native.c b/src/journal/journald-native.c index de8d6998cf..ac3183ece3 100644 --- a/src/journal/journald-native.c +++ b/src/journal/journald-native.c @@ -25,7 +25,7 @@ #include "socket-util.h" #include "path-util.h" -#include "journald.h" +#include "journald-server.h" #include "journald-native.h" #include "journald-kmsg.h" #include "journald-console.h" diff --git a/src/journal/journald-native.h b/src/journal/journald-native.h index b1b7af0b94..16c09f523e 100644 --- a/src/journal/journald-native.h +++ b/src/journal/journald-native.h @@ -21,7 +21,7 @@ along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ -#include "journald.h" +#include "journald-server.h" void server_process_native_message(Server *s, const void *buffer, size_t buffer_size, struct ucred *ucred, struct timeval *tv, const char *label, size_t label_len); diff --git a/src/journal/journald-server.c b/src/journal/journald-server.c new file mode 100644 index 0000000000..0ff2866c11 --- /dev/null +++ b/src/journal/journald-server.c @@ -0,0 +1,1502 @@ +/*-*- 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 <libudev.h> +#include <systemd/sd-journal.h> +#include <systemd/sd-messages.h> +#include <systemd/sd-daemon.h> + +#ifdef HAVE_LOGIND +#include <systemd/sd-login.h> +#endif + +#include "mkdir.h" +#include "hashmap.h" +#include "journal-file.h" +#include "socket-util.h" +#include "cgroup-util.h" +#include "list.h" +#include "virt.h" +#include "missing.h" +#include "conf-parser.h" +#include "journal-internal.h" +#include "journal-vacuum.h" +#include "journal-authenticate.h" +#include "journald-server.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" + +#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_RATE_LIMIT_INTERVAL (10*USEC_PER_SEC) +#define DEFAULT_RATE_LIMIT_BURST 200 + +#define RECHECK_AVAILABLE_SPACE_USEC (30*USEC_PER_SEC) + +static const char* const storage_table[] = { + [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_NONE] = "none", + [SPLIT_UID] = "uid", + [SPLIT_LOGIN] = "login" +}; + +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) { + char ids[33], *p; + const char *f; + sd_id128_t machine; + struct statvfs ss; + uint64_t sum = 0, avail = 0, ss_avail = 0; + int r; + DIR *d; + usec_t ts; + JournalMetrics *m; + + ts = now(CLOCK_MONOTONIC); + + if (s->cached_available_space_timestamp + RECHECK_AVAILABLE_SPACE_USEC > ts) + 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); + free(p); + + if (!d) + return 0; + + if (fstatvfs(dirfd(d), &ss) < 0) + goto finish; + + for (;;) { + struct stat st; + struct dirent *de; + union dirent_storage buf; + + r = readdir_r(d, &buf.de, &de); + if (r != 0) + break; + + 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; + } + + avail = sum >= m->max_use ? 0 : m->max_use - sum; + + ss_avail = ss.f_bsize * ss.f_bavail; + + ss_avail = ss_avail < m->keep_free ? 0 : ss_avail - m->keep_free; + + if (ss_avail < avail) + avail = ss_avail; + + s->cached_available_space = avail; + s->cached_available_space_timestamp = ts; + +finish: + closedir(d); + + return avail; +} + +static void server_read_file_gid(Server *s) { + const char *adm = "adm"; + int r; + + assert(s); + + if (s->file_gid_valid) + return; + + r = get_group_creds(&adm, &s->file_gid); + if (r < 0) + log_warning("Failed to resolve 'adm' group: %s", strerror(-r)); + + /* if we couldn't read the gid, then it will be 0, but that's + * fine and we shouldn't try to resolve the group again, so + * let's just pretend it worked right-away. */ + s->file_gid_valid = true; +} + +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); + + server_read_file_gid(s); + + r = fchmod_and_fchown(f->fd, 0640, 0, s->file_gid); + if (r < 0) + log_warning("Failed to fix access mode/rights on %s, ignoring: %s", f->path, strerror(-r)); + +#ifdef HAVE_ACL + if (uid <= 0) + 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; + } + } + + if (acl_get_permset(entry, &permset) < 0 || + acl_add_perm(permset, ACL_READ) < 0 || + acl_calc_mask(&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) { + char *p; + 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 <= 0) + 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-%lu.journal", + SD_ID128_FORMAT_VAL(machine), (unsigned long) 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, s->system_journal, &f); + free(p); + + 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; +} + +void server_rotate(Server *s) { + JournalFile *f; + void *k; + Iterator i; + int r; + + log_debug("Rotating..."); + + if (s->runtime_journal) { + r = journal_file_rotate(&s->runtime_journal, s->compress, false); + if (r < 0) + if (s->runtime_journal) + log_error("Failed to rotate %s: %s", s->runtime_journal->path, strerror(-r)); + else + log_error("Failed to create new runtime journal: %s", strerror(-r)); + else + server_fix_perms(s, s->runtime_journal, 0); + } + + if (s->system_journal) { + r = journal_file_rotate(&s->system_journal, s->compress, s->seal); + if (r < 0) + if (s->system_journal) + log_error("Failed to rotate %s: %s", s->system_journal->path, strerror(-r)); + else + log_error("Failed to create new system journal: %s", strerror(-r)); + + else + server_fix_perms(s, s->system_journal, 0); + } + + HASHMAP_FOREACH_KEY(f, k, s->user_journals, i) { + r = journal_file_rotate(&f, s->compress, s->seal); + if (r < 0) + if (f->path) + log_error("Failed to rotate %s: %s", f->path, strerror(-r)); + else + log_error("Failed to create user journal: %s", strerror(-r)); + else { + hashmap_replace(s->user_journals, k, f); + server_fix_perms(s, f, PTR_TO_UINT32(k)); + } + } +} + +void server_vacuum(Server *s) { + char *p; + 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); + + if (s->system_journal) { + p = strappend("/var/log/journal/", ids); + if (!p) { + log_oom(); + return; + } + + r = journal_directory_vacuum(p, s->system_metrics.max_use, s->system_metrics.keep_free, s->max_retention_usec, &s->oldest_file_usec); + if (r < 0 && r != -ENOENT) + log_error("Failed to vacuum %s: %s", p, strerror(-r)); + free(p); + } + + if (s->runtime_journal) { + p = strappend("/run/log/journal/", ids); + if (!p) { + log_oom(); + return; + } + + r = journal_directory_vacuum(p, s->runtime_metrics.max_use, s->runtime_metrics.keep_free, s->max_retention_usec, &s->oldest_file_usec); + if (r < 0 && r != -ENOENT) + log_error("Failed to vacuum %s: %s", p, strerror(-r)); + free(p); + } + + s->cached_available_space_timestamp = 0; +} + +static char *shortened_cgroup_path(pid_t pid) { + int r; + char *process_path, *init_path, *path; + + assert(pid > 0); + + r = cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, pid, &process_path); + if (r < 0) + return NULL; + + r = cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, 1, &init_path); + if (r < 0) { + free(process_path); + return NULL; + } + + if (endswith(init_path, "/system")) + init_path[strlen(init_path) - 7] = 0; + else if (streq(init_path, "/")) + init_path[0] = 0; + + if (startswith(process_path, init_path)) { + char *p; + + p = strdup(process_path + strlen(init_path)); + if (!p) { + free(process_path); + free(init_path); + return NULL; + } + path = p; + } else { + path = process_path; + process_path = NULL; + } + + free(process_path); + free(init_path); + + return path; +} + +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) { + 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) + return; + + if (vacuumed || !shall_try_append_again(f, r)) { + log_error("Failed to write entry, ignoring: %s", 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) + log_error("Failed to write entry, ignoring: %s", strerror(-r)); +} + +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) { + + char *pid = NULL, *uid = NULL, *gid = NULL, + *source_time = NULL, *boot_id = NULL, *machine_id = NULL, + *comm = NULL, *cmdline = NULL, *hostname = NULL, + *audit_session = NULL, *audit_loginuid = NULL, + *exe = NULL, *cgroup = NULL, *session = NULL, + *owner_uid = NULL, *unit = NULL, *selinux_context = NULL; + + char idbuf[33]; + sd_id128_t id; + int r; + char *t; + uid_t loginuid = 0, realuid = 0; + + assert(s); + assert(iovec); + assert(n > 0); + assert(n + N_IOVEC_META_FIELDS <= m); + + if (ucred) { + uint32_t audit; +#ifdef HAVE_LOGIND + uid_t owner; +#endif + + realuid = ucred->uid; + + if (asprintf(&pid, "_PID=%lu", (unsigned long) ucred->pid) >= 0) + IOVEC_SET_STRING(iovec[n++], pid); + + if (asprintf(&uid, "_UID=%lu", (unsigned long) ucred->uid) >= 0) + IOVEC_SET_STRING(iovec[n++], uid); + + if (asprintf(&gid, "_GID=%lu", (unsigned long) ucred->gid) >= 0) + IOVEC_SET_STRING(iovec[n++], gid); + + r = get_process_comm(ucred->pid, &t); + if (r >= 0) { + comm = strappend("_COMM=", t); + free(t); + + if (comm) + IOVEC_SET_STRING(iovec[n++], comm); + } + + r = get_process_exe(ucred->pid, &t); + if (r >= 0) { + exe = strappend("_EXE=", t); + free(t); + + if (exe) + IOVEC_SET_STRING(iovec[n++], exe); + } + + r = get_process_cmdline(ucred->pid, LINE_MAX, false, &t); + if (r >= 0) { + cmdline = strappend("_CMDLINE=", t); + free(t); + + if (cmdline) + IOVEC_SET_STRING(iovec[n++], cmdline); + } + + r = audit_session_from_pid(ucred->pid, &audit); + if (r >= 0) + if (asprintf(&audit_session, "_AUDIT_SESSION=%lu", (unsigned long) audit) >= 0) + IOVEC_SET_STRING(iovec[n++], audit_session); + + r = audit_loginuid_from_pid(ucred->pid, &loginuid); + if (r >= 0) + if (asprintf(&audit_loginuid, "_AUDIT_LOGINUID=%lu", (unsigned long) loginuid) >= 0) + IOVEC_SET_STRING(iovec[n++], audit_loginuid); + + t = shortened_cgroup_path(ucred->pid); + if (t) { + cgroup = strappend("_SYSTEMD_CGROUP=", t); + free(t); + + if (cgroup) + IOVEC_SET_STRING(iovec[n++], cgroup); + } + +#ifdef HAVE_LOGIND + if (sd_pid_get_session(ucred->pid, &t) >= 0) { + session = strappend("_SYSTEMD_SESSION=", t); + free(t); + + if (session) + IOVEC_SET_STRING(iovec[n++], session); + } + + if (sd_pid_get_owner_uid(ucred->uid, &owner) >= 0) + if (asprintf(&owner_uid, "_SYSTEMD_OWNER_UID=%lu", (unsigned long) owner) >= 0) + IOVEC_SET_STRING(iovec[n++], owner_uid); +#endif + + if (cg_pid_get_unit(ucred->pid, &t) >= 0) { + unit = strappend("_SYSTEMD_UNIT=", t); + free(t); + } else if (unit_id) + unit = strappend("_SYSTEMD_UNIT=", unit_id); + + if (unit) + IOVEC_SET_STRING(iovec[n++], unit); + +#ifdef HAVE_SELINUX + if (label) { + selinux_context = malloc(sizeof("_SELINUX_CONTEXT=") + label_len); + if (selinux_context) { + memcpy(selinux_context, "_SELINUX_CONTEXT=", sizeof("_SELINUX_CONTEXT=")-1); + memcpy(selinux_context+sizeof("_SELINUX_CONTEXT=")-1, label, label_len); + selinux_context[sizeof("_SELINUX_CONTEXT=")-1+label_len] = 0; + IOVEC_SET_STRING(iovec[n++], selinux_context); + } + } else { + security_context_t con; + + if (getpidcon(ucred->pid, &con) >= 0) { + selinux_context = strappend("_SELINUX_CONTEXT=", con); + if (selinux_context) + IOVEC_SET_STRING(iovec[n++], selinux_context); + + freecon(con); + } + } +#endif + } + + if (tv) { + if (asprintf(&source_time, "_SOURCE_REALTIME_TIMESTAMP=%llu", + (unsigned long long) timeval_load(tv)) >= 0) + 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. */ + r = sd_id128_get_boot(&id); + if (r >= 0) + if (asprintf(&boot_id, "_BOOT_ID=%s", sd_id128_to_string(id, idbuf)) >= 0) + IOVEC_SET_STRING(iovec[n++], boot_id); + + r = sd_id128_get_machine(&id); + if (r >= 0) + if (asprintf(&machine_id, "_MACHINE_ID=%s", sd_id128_to_string(id, idbuf)) >= 0) + IOVEC_SET_STRING(iovec[n++], machine_id); + + t = gethostname_malloc(); + if (t) { + hostname = strappend("_HOSTNAME=", t); + free(t); + if (hostname) + IOVEC_SET_STRING(iovec[n++], hostname); + } + + assert(n <= m); + + write_to_journal(s, + s->split_mode == SPLIT_NONE ? 0 : + (s->split_mode == SPLIT_UID ? realuid : + (realuid == 0 ? 0 : loginuid)), iovec, n); + + free(pid); + free(uid); + free(gid); + free(comm); + free(exe); + free(cmdline); + free(source_time); + free(boot_id); + free(machine_id); + free(hostname); + free(audit_session); + free(audit_loginuid); + free(cgroup); + free(session); + free(owner_uid); + free(unit); + free(selinux_context); +} + +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); + } + + zero(ucred); + ucred.pid = getpid(); + ucred.uid = getuid(); + ucred.gid = getgid(); + + dispatch_message_real(s, iovec, n, ELEMENTSOF(iovec), &ucred, NULL, NULL, 0, NULL); +} + +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) { + + int rl; + char *path = NULL, *c; + + assert(s); + assert(iovec || n == 0); + + if (n == 0) + return; + + if (LOG_PRI(priority) > s->max_level_store) + return; + + if (!ucred) + goto finish; + + path = shortened_cgroup_path(ucred->pid); + if (!path) + 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)); + + if (rl == 0) { + free(path); + 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); + + free(path); + +finish: + dispatch_message_real(s, iovec, n, m, ucred, tv, label, label_len, unit_id); +} + + +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) + 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 = strappend("/var/log/journal/", ids); + if (!fn) + return -ENOMEM; + + (void) mkdir(fn, 0755); + free(fn); + + fn = strjoin("/var/log/journal/", ids, "/system.journal", NULL); + if (!fn) + return -ENOMEM; + + r = journal_file_open_reliably(fn, O_RDWR|O_CREAT, 0640, s->compress, s->seal, &s->system_metrics, s->mmap, NULL, &s->system_journal); + free(fn); + + if (r >= 0) { + char fb[FORMAT_BYTES_MAX]; + + server_fix_perms(s, s->system_journal, 0); + server_driver_message(s, SD_ID128_NULL, "Allowing system journal files to grow to %s.", + format_bytes(fb, sizeof(fb), s->system_metrics.max_use)); + + } 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_parents(fn, 0755); + 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) { + char fb[FORMAT_BYTES_MAX]; + + server_fix_perms(s, s->runtime_journal, 0); + server_driver_message(s, SD_ID128_NULL, "Allowing runtime journal files to grow to %s.", + format_bytes(fb, sizeof(fb), s->runtime_metrics.max_use)); + } + } + + return r; +} + +int server_flush_to_var(Server *s) { + int r; + sd_id128_t machine; + sd_journal *j = NULL; + + 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..."); + + r = sd_id128_get_machine(&machine); + if (r < 0) { + log_error("Failed to get machine id: %s", strerror(-r)); + 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_FOREACH(j) { + Object *o = NULL; + JournalFile *f; + + f = j->current_file; + assert(f && f->current_offset > 0); + + 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); + + 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); + + if (j) + sd_journal_close(j); + + return r; +} + +int process_event(Server *s, struct epoll_event *ev) { + assert(s); + assert(ev); + + if (ev->data.fd == s->signal_fd) { + struct signalfd_siginfo sfsi; + ssize_t n; + + if (ev->events != EPOLLIN) { + log_error("Got invalid event from epoll."); + return -EIO; + } + + n = read(s->signal_fd, &sfsi, sizeof(sfsi)); + if (n != sizeof(sfsi)) { + + if (n >= 0) + return -EIO; + + if (errno == EINTR || errno == EAGAIN) + return 1; + + return -errno; + } + + log_info("Received SIG%s", signal_to_string(sfsi.ssi_signo)); + + if (sfsi.ssi_signo == SIGUSR1) { + touch("/run/systemd/journal/flushed"); + server_flush_to_var(s); + return 1; + } + + if (sfsi.ssi_signo == SIGUSR2) { + server_rotate(s); + server_vacuum(s); + return 1; + } + + return 0; + + } else if (ev->data.fd == s->dev_kmsg_fd) { + int r; + + if (ev->events != EPOLLIN) { + log_error("Got invalid event from epoll."); + return -EIO; + } + + r = server_read_dev_kmsg(s); + if (r < 0) + return r; + + return 1; + + } else if (ev->data.fd == s->native_fd || + ev->data.fd == s->syslog_fd) { + + if (ev->events != EPOLLIN) { + log_error("Got invalid event from epoll."); + return -EIO; + } + + for (;;) { + struct msghdr msghdr; + struct iovec iovec; + struct ucred *ucred = NULL; + struct timeval *tv = NULL; + struct cmsghdr *cmsg; + char *label = NULL; + size_t label_len = 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; + ssize_t n; + int v; + int *fds = NULL; + unsigned n_fds = 0; + + if (ioctl(ev->data.fd, SIOCINQ, &v) < 0) { + log_error("SIOCINQ failed: %m"); + return -errno; + } + + if (s->buffer_size < (size_t) v) { + void *b; + size_t l; + + l = MAX(LINE_MAX + (size_t) v, s->buffer_size * 2); + b = realloc(s->buffer, l+1); + + if (!b) { + log_error("Couldn't increase buffer."); + return -ENOMEM; + } + + s->buffer_size = l; + s->buffer = b; + } + + zero(iovec); + iovec.iov_base = s->buffer; + iovec.iov_len = s->buffer_size; + + zero(control); + zero(msghdr); + msghdr.msg_iov = &iovec; + msghdr.msg_iovlen = 1; + msghdr.msg_control = &control; + msghdr.msg_controllen = sizeof(control); + + n = recvmsg(ev->data.fd, &msghdr, MSG_DONTWAIT|MSG_CMSG_CLOEXEC); + if (n < 0) { + + if (errno == EINTR || errno == EAGAIN) + return 1; + + 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 (ev->data.fd == s->syslog_fd) { + char *e; + + if (n > 0 && n_fds == 0) { + e = memchr(s->buffer, '\n', n); + if (e) + *e = 0; + else + 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); + } + + return 1; + + } else if (ev->data.fd == s->stdout_fd) { + + if (ev->events != EPOLLIN) { + log_error("Got invalid event from epoll."); + return -EIO; + } + + stdout_stream_new(s); + return 1; + + } else { + StdoutStream *stream; + + if ((ev->events|EPOLLIN|EPOLLHUP) != (EPOLLIN|EPOLLHUP)) { + log_error("Got invalid event from epoll."); + return -EIO; + } + + /* If it is none of the well-known fds, it must be an + * stdout stream fd. Note that this is a bit ugly here + * (since we rely that none of the well-known fds + * could be interpreted as pointer), but nonetheless + * safe, since the well-known fds would never get an + * fd > 4096, i.e. beyond the first memory page */ + + stream = ev->data.ptr; + + if (stdout_stream_process(stream) <= 0) + stdout_stream_free(stream); + + return 1; + } + + log_error("Unknown event."); + return 0; +} + +static int open_signalfd(Server *s) { + sigset_t mask; + struct epoll_event ev; + + assert(s); + + assert_se(sigemptyset(&mask) == 0); + sigset_add_many(&mask, SIGINT, SIGTERM, SIGUSR1, SIGUSR2, -1); + assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0); + + s->signal_fd = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC); + if (s->signal_fd < 0) { + log_error("signalfd(): %m"); + return -errno; + } + + zero(ev); + ev.events = EPOLLIN; + ev.data.fd = s->signal_fd; + + if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->signal_fd, &ev) < 0) { + log_error("epoll_ctl(): %m"); + return -errno; + } + + return 0; +} + +static int server_parse_proc_cmdline(Server *s) { + char *line, *w, *state; + int r; + size_t l; + + if (detect_container(NULL) > 0) + return 0; + + r = read_one_line_file("/proc/cmdline", &line); + if (r < 0) { + log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r)); + return 0; + } + + FOREACH_WORD_QUOTED(w, l, line, state) { + char *word; + + word = strndup(w, l); + if (!word) { + r = -ENOMEM; + goto finish; + } + + 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")) + log_warning("Invalid systemd.journald parameter. Ignoring."); + + free(word); + } + + r = 0; + +finish: + free(line); + return r; +} + +static int server_parse_config_file(Server *s) { + FILE *f; + const char *fn; + int r; + + assert(s); + + fn = "/etc/systemd/journald.conf"; + f = fopen(fn, "re"); + if (!f) { + if (errno == ENOENT) + return 0; + + log_warning("Failed to open configuration file %s: %m", fn); + return -errno; + } + + r = config_parse(fn, f, "Journal\0", config_item_perf_lookup, (void*) journald_gperf_lookup, false, s); + if (r < 0) + log_warning("Failed to parse configuration file: %s", strerror(-r)); + + fclose(f); + + return r; +} + +int server_init(Server *s) { + int n, r, fd; + + assert(s); + + zero(*s); + s->syslog_fd = s->native_fd = s->stdout_fd = s->signal_fd = s->epoll_fd = s->dev_kmsg_fd = -1; + s->compress = true; + s->seal = true; + + s->rate_limit_interval = DEFAULT_RATE_LIMIT_INTERVAL; + s->rate_limit_burst = DEFAULT_RATE_LIMIT_BURST; + + s->forward_to_syslog = true; + + s->max_level_store = LOG_DEBUG; + s->max_level_syslog = LOG_DEBUG; + s->max_level_kmsg = LOG_NOTICE; + s->max_level_console = LOG_INFO; + + 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); + + 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(); + + s->epoll_fd = epoll_create1(EPOLL_CLOEXEC); + if (s->epoll_fd < 0) { + log_error("Failed to create epoll object: %m"); + return -errno; + } + + 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) { + + 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 = open_signalfd(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 = 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); + + if (s->epoll_fd >= 0) + close_nointr_nofail(s->epoll_fd); + + if (s->signal_fd >= 0) + close_nointr_nofail(s->signal_fd); + + if (s->syslog_fd >= 0) + close_nointr_nofail(s->syslog_fd); + + if (s->native_fd >= 0) + close_nointr_nofail(s->native_fd); + + if (s->stdout_fd >= 0) + close_nointr_nofail(s->stdout_fd); + + if (s->dev_kmsg_fd >= 0) + close_nointr_nofail(s->dev_kmsg_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); + + if (s->mmap) + mmap_cache_unref(s->mmap); + + if (s->udev) + udev_unref(s->udev); +} diff --git a/src/journal/journald.h b/src/journal/journald-server.h index e3ef3b529d..9f50a29e50 100644 --- a/src/journal/journald.h +++ b/src/journal/journald-server.h @@ -23,6 +23,7 @@ #include <inttypes.h> #include <stdbool.h> +#include <sys/epoll.h> #include <sys/types.h> #include <sys/socket.h> @@ -139,3 +140,13 @@ int config_parse_split_mode(const char *filename, unsigned line, const char *sec const char *split_mode_to_string(SplitMode s); SplitMode split_mode_from_string(const char *s); + +void server_fix_perms(Server *s, JournalFile *f, uid_t uid); +bool shall_try_append_again(JournalFile *f, int r); +int server_init(Server *s); +void server_done(Server *s); +void server_vacuum(Server *s); +void server_rotate(Server *s); +int server_flush_to_var(Server *s); +int process_event(Server *s, struct epoll_event *ev); +void server_maybe_append_tags(Server *s); diff --git a/src/journal/journald-stream.c b/src/journal/journald-stream.c index 113c4214f8..7b88f747db 100644 --- a/src/journal/journald-stream.c +++ b/src/journal/journald-stream.c @@ -29,7 +29,7 @@ #endif #include "socket-util.h" -#include "journald.h" +#include "journald-server.h" #include "journald-stream.h" #include "journald-syslog.h" #include "journald-kmsg.h" diff --git a/src/journal/journald-stream.h b/src/journal/journald-stream.h index fff0bae372..dfb6267bf6 100644 --- a/src/journal/journald-stream.h +++ b/src/journal/journald-stream.h @@ -21,7 +21,7 @@ along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ -#include "journald.h" +#include "journald-server.h" int server_open_stdout_socket(Server *s); diff --git a/src/journal/journald-syslog.c b/src/journal/journald-syslog.c index c4f81b68f2..afddca3630 100644 --- a/src/journal/journald-syslog.c +++ b/src/journal/journald-syslog.c @@ -25,7 +25,7 @@ #include "systemd/sd-messages.h" #include "socket-util.h" -#include "journald.h" +#include "journald-server.h" #include "journald-syslog.h" #include "journald-kmsg.h" #include "journald-console.h" diff --git a/src/journal/journald-syslog.h b/src/journal/journald-syslog.h index fa9de1a951..7ff215b524 100644 --- a/src/journal/journald-syslog.h +++ b/src/journal/journald-syslog.h @@ -21,7 +21,7 @@ along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ -#include "journald.h" +#include "journald-server.h" int syslog_fixup_facility(int priority); diff --git a/src/journal/journald.c b/src/journal/journald.c index f56e822428..d6b9be5974 100644 --- a/src/journal/journald.c +++ b/src/journal/journald.c @@ -22,1490 +22,16 @@ #include <sys/epoll.h> #include <sys/socket.h> #include <errno.h> -#include <sys/signalfd.h> #include <unistd.h> -#include <fcntl.h> -#include <stddef.h> -#include <sys/ioctl.h> -#include <linux/sockios.h> -#include <sys/statvfs.h> -#include <sys/mman.h> -#include <libudev.h> #include <systemd/sd-journal.h> #include <systemd/sd-messages.h> #include <systemd/sd-daemon.h> -#ifdef HAVE_LOGIND -#include <systemd/sd-login.h> -#endif - -#include "mkdir.h" -#include "hashmap.h" -#include "journal-file.h" -#include "socket-util.h" -#include "cgroup-util.h" -#include "list.h" -#include "virt.h" -#include "missing.h" -#include "conf-parser.h" -#include "journal-internal.h" -#include "journal-vacuum.h" #include "journal-authenticate.h" -#include "journald.h" -#include "journald-rate-limit.h" +#include "journald-server.h" #include "journald-kmsg.h" #include "journald-syslog.h" -#include "journald-stream.h" -#include "journald-console.h" -#include "journald-native.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_RATE_LIMIT_INTERVAL (10*USEC_PER_SEC) -#define DEFAULT_RATE_LIMIT_BURST 200 - -#define RECHECK_AVAILABLE_SPACE_USEC (30*USEC_PER_SEC) - -static const char* const storage_table[] = { - [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_NONE] = "none", - [SPLIT_UID] = "uid", - [SPLIT_LOGIN] = "login" -}; - -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) { - char ids[33], *p; - const char *f; - sd_id128_t machine; - struct statvfs ss; - uint64_t sum = 0, avail = 0, ss_avail = 0; - int r; - DIR *d; - usec_t ts; - JournalMetrics *m; - - ts = now(CLOCK_MONOTONIC); - - if (s->cached_available_space_timestamp + RECHECK_AVAILABLE_SPACE_USEC > ts) - 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); - free(p); - - if (!d) - return 0; - - if (fstatvfs(dirfd(d), &ss) < 0) - goto finish; - - for (;;) { - struct stat st; - struct dirent *de; - union dirent_storage buf; - - r = readdir_r(d, &buf.de, &de); - if (r != 0) - break; - - 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; - } - - avail = sum >= m->max_use ? 0 : m->max_use - sum; - - ss_avail = ss.f_bsize * ss.f_bavail; - - ss_avail = ss_avail < m->keep_free ? 0 : ss_avail - m->keep_free; - - if (ss_avail < avail) - avail = ss_avail; - - s->cached_available_space = avail; - s->cached_available_space_timestamp = ts; - -finish: - closedir(d); - - return avail; -} - -static void server_read_file_gid(Server *s) { - const char *adm = "adm"; - int r; - - assert(s); - - if (s->file_gid_valid) - return; - - r = get_group_creds(&adm, &s->file_gid); - if (r < 0) - log_warning("Failed to resolve 'adm' group: %s", strerror(-r)); - - /* if we couldn't read the gid, then it will be 0, but that's - * fine and we shouldn't try to resolve the group again, so - * let's just pretend it worked right-away. */ - s->file_gid_valid = true; -} - -static 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); - - server_read_file_gid(s); - - r = fchmod_and_fchown(f->fd, 0640, 0, s->file_gid); - if (r < 0) - log_warning("Failed to fix access mode/rights on %s, ignoring: %s", f->path, strerror(-r)); - -#ifdef HAVE_ACL - if (uid <= 0) - 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; - } - } - - if (acl_get_permset(entry, &permset) < 0 || - acl_add_perm(permset, ACL_READ) < 0 || - acl_calc_mask(&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) { - char *p; - 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 <= 0) - 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-%lu.journal", - SD_ID128_FORMAT_VAL(machine), (unsigned long) 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, s->system_journal, &f); - free(p); - - 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 void server_rotate(Server *s) { - JournalFile *f; - void *k; - Iterator i; - int r; - - log_debug("Rotating..."); - - if (s->runtime_journal) { - r = journal_file_rotate(&s->runtime_journal, s->compress, false); - if (r < 0) - if (s->runtime_journal) - log_error("Failed to rotate %s: %s", s->runtime_journal->path, strerror(-r)); - else - log_error("Failed to create new runtime journal: %s", strerror(-r)); - else - server_fix_perms(s, s->runtime_journal, 0); - } - - if (s->system_journal) { - r = journal_file_rotate(&s->system_journal, s->compress, s->seal); - if (r < 0) - if (s->system_journal) - log_error("Failed to rotate %s: %s", s->system_journal->path, strerror(-r)); - else - log_error("Failed to create new system journal: %s", strerror(-r)); - - else - server_fix_perms(s, s->system_journal, 0); - } - - HASHMAP_FOREACH_KEY(f, k, s->user_journals, i) { - r = journal_file_rotate(&f, s->compress, s->seal); - if (r < 0) - if (f->path) - log_error("Failed to rotate %s: %s", f->path, strerror(-r)); - else - log_error("Failed to create user journal: %s", strerror(-r)); - else { - hashmap_replace(s->user_journals, k, f); - server_fix_perms(s, f, PTR_TO_UINT32(k)); - } - } -} - -static void server_vacuum(Server *s) { - char *p; - 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); - - if (s->system_journal) { - p = strappend("/var/log/journal/", ids); - if (!p) { - log_oom(); - return; - } - - r = journal_directory_vacuum(p, s->system_metrics.max_use, s->system_metrics.keep_free, s->max_retention_usec, &s->oldest_file_usec); - if (r < 0 && r != -ENOENT) - log_error("Failed to vacuum %s: %s", p, strerror(-r)); - free(p); - } - - if (s->runtime_journal) { - p = strappend("/run/log/journal/", ids); - if (!p) { - log_oom(); - return; - } - - r = journal_directory_vacuum(p, s->runtime_metrics.max_use, s->runtime_metrics.keep_free, s->max_retention_usec, &s->oldest_file_usec); - if (r < 0 && r != -ENOENT) - log_error("Failed to vacuum %s: %s", p, strerror(-r)); - free(p); - } - - s->cached_available_space_timestamp = 0; -} - -static char *shortened_cgroup_path(pid_t pid) { - int r; - char *process_path, *init_path, *path; - - assert(pid > 0); - - r = cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, pid, &process_path); - if (r < 0) - return NULL; - - r = cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, 1, &init_path); - if (r < 0) { - free(process_path); - return NULL; - } - - if (endswith(init_path, "/system")) - init_path[strlen(init_path) - 7] = 0; - else if (streq(init_path, "/")) - init_path[0] = 0; - - if (startswith(process_path, init_path)) { - char *p; - - p = strdup(process_path + strlen(init_path)); - if (!p) { - free(process_path); - free(init_path); - return NULL; - } - path = p; - } else { - path = process_path; - process_path = NULL; - } - - free(process_path); - free(init_path); - - return path; -} - -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 - -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) { - 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) - return; - - if (vacuumed || !shall_try_append_again(f, r)) { - log_error("Failed to write entry, ignoring: %s", 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) - log_error("Failed to write entry, ignoring: %s", strerror(-r)); -} - -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) { - - char *pid = NULL, *uid = NULL, *gid = NULL, - *source_time = NULL, *boot_id = NULL, *machine_id = NULL, - *comm = NULL, *cmdline = NULL, *hostname = NULL, - *audit_session = NULL, *audit_loginuid = NULL, - *exe = NULL, *cgroup = NULL, *session = NULL, - *owner_uid = NULL, *unit = NULL, *selinux_context = NULL; - - char idbuf[33]; - sd_id128_t id; - int r; - char *t; - uid_t loginuid = 0, realuid = 0; - - assert(s); - assert(iovec); - assert(n > 0); - assert(n + N_IOVEC_META_FIELDS <= m); - - if (ucred) { - uint32_t audit; -#ifdef HAVE_LOGIND - uid_t owner; -#endif - - realuid = ucred->uid; - - if (asprintf(&pid, "_PID=%lu", (unsigned long) ucred->pid) >= 0) - IOVEC_SET_STRING(iovec[n++], pid); - - if (asprintf(&uid, "_UID=%lu", (unsigned long) ucred->uid) >= 0) - IOVEC_SET_STRING(iovec[n++], uid); - - if (asprintf(&gid, "_GID=%lu", (unsigned long) ucred->gid) >= 0) - IOVEC_SET_STRING(iovec[n++], gid); - - r = get_process_comm(ucred->pid, &t); - if (r >= 0) { - comm = strappend("_COMM=", t); - free(t); - - if (comm) - IOVEC_SET_STRING(iovec[n++], comm); - } - - r = get_process_exe(ucred->pid, &t); - if (r >= 0) { - exe = strappend("_EXE=", t); - free(t); - - if (exe) - IOVEC_SET_STRING(iovec[n++], exe); - } - - r = get_process_cmdline(ucred->pid, LINE_MAX, false, &t); - if (r >= 0) { - cmdline = strappend("_CMDLINE=", t); - free(t); - - if (cmdline) - IOVEC_SET_STRING(iovec[n++], cmdline); - } - - r = audit_session_from_pid(ucred->pid, &audit); - if (r >= 0) - if (asprintf(&audit_session, "_AUDIT_SESSION=%lu", (unsigned long) audit) >= 0) - IOVEC_SET_STRING(iovec[n++], audit_session); - - r = audit_loginuid_from_pid(ucred->pid, &loginuid); - if (r >= 0) - if (asprintf(&audit_loginuid, "_AUDIT_LOGINUID=%lu", (unsigned long) loginuid) >= 0) - IOVEC_SET_STRING(iovec[n++], audit_loginuid); - - t = shortened_cgroup_path(ucred->pid); - if (t) { - cgroup = strappend("_SYSTEMD_CGROUP=", t); - free(t); - - if (cgroup) - IOVEC_SET_STRING(iovec[n++], cgroup); - } - -#ifdef HAVE_LOGIND - if (sd_pid_get_session(ucred->pid, &t) >= 0) { - session = strappend("_SYSTEMD_SESSION=", t); - free(t); - - if (session) - IOVEC_SET_STRING(iovec[n++], session); - } - - if (sd_pid_get_owner_uid(ucred->uid, &owner) >= 0) - if (asprintf(&owner_uid, "_SYSTEMD_OWNER_UID=%lu", (unsigned long) owner) >= 0) - IOVEC_SET_STRING(iovec[n++], owner_uid); -#endif - - if (cg_pid_get_unit(ucred->pid, &t) >= 0) { - unit = strappend("_SYSTEMD_UNIT=", t); - free(t); - } else if (unit_id) - unit = strappend("_SYSTEMD_UNIT=", unit_id); - - if (unit) - IOVEC_SET_STRING(iovec[n++], unit); - -#ifdef HAVE_SELINUX - if (label) { - selinux_context = malloc(sizeof("_SELINUX_CONTEXT=") + label_len); - if (selinux_context) { - memcpy(selinux_context, "_SELINUX_CONTEXT=", sizeof("_SELINUX_CONTEXT=")-1); - memcpy(selinux_context+sizeof("_SELINUX_CONTEXT=")-1, label, label_len); - selinux_context[sizeof("_SELINUX_CONTEXT=")-1+label_len] = 0; - IOVEC_SET_STRING(iovec[n++], selinux_context); - } - } else { - security_context_t con; - - if (getpidcon(ucred->pid, &con) >= 0) { - selinux_context = strappend("_SELINUX_CONTEXT=", con); - if (selinux_context) - IOVEC_SET_STRING(iovec[n++], selinux_context); - - freecon(con); - } - } -#endif - } - - if (tv) { - if (asprintf(&source_time, "_SOURCE_REALTIME_TIMESTAMP=%llu", - (unsigned long long) timeval_load(tv)) >= 0) - 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. */ - r = sd_id128_get_boot(&id); - if (r >= 0) - if (asprintf(&boot_id, "_BOOT_ID=%s", sd_id128_to_string(id, idbuf)) >= 0) - IOVEC_SET_STRING(iovec[n++], boot_id); - - r = sd_id128_get_machine(&id); - if (r >= 0) - if (asprintf(&machine_id, "_MACHINE_ID=%s", sd_id128_to_string(id, idbuf)) >= 0) - IOVEC_SET_STRING(iovec[n++], machine_id); - - t = gethostname_malloc(); - if (t) { - hostname = strappend("_HOSTNAME=", t); - free(t); - if (hostname) - IOVEC_SET_STRING(iovec[n++], hostname); - } - - assert(n <= m); - - write_to_journal(s, - s->split_mode == SPLIT_NONE ? 0 : - (s->split_mode == SPLIT_UID ? realuid : - (realuid == 0 ? 0 : loginuid)), iovec, n); - - free(pid); - free(uid); - free(gid); - free(comm); - free(exe); - free(cmdline); - free(source_time); - free(boot_id); - free(machine_id); - free(hostname); - free(audit_session); - free(audit_loginuid); - free(cgroup); - free(session); - free(owner_uid); - free(unit); - free(selinux_context); -} - -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); - } - - zero(ucred); - ucred.pid = getpid(); - ucred.uid = getuid(); - ucred.gid = getgid(); - - dispatch_message_real(s, iovec, n, ELEMENTSOF(iovec), &ucred, NULL, NULL, 0, NULL); -} - -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) { - - int rl; - char *path = NULL, *c; - - assert(s); - assert(iovec || n == 0); - - if (n == 0) - return; - - if (LOG_PRI(priority) > s->max_level_store) - return; - - if (!ucred) - goto finish; - - path = shortened_cgroup_path(ucred->pid); - if (!path) - goto finish; - - /* example: /user/lennart/3/foobar - * /system/dbus.service/foobar - * - * So let's cut of everything past the third /, since that is - * wher 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)); - - if (rl == 0) { - free(path); - 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); - - free(path); - -finish: - dispatch_message_real(s, iovec, n, m, ucred, tv, label, label_len, unit_id); -} - - -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) - 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 = strappend("/var/log/journal/", ids); - if (!fn) - return -ENOMEM; - - (void) mkdir(fn, 0755); - free(fn); - - fn = strjoin("/var/log/journal/", ids, "/system.journal", NULL); - if (!fn) - return -ENOMEM; - - r = journal_file_open_reliably(fn, O_RDWR|O_CREAT, 0640, s->compress, s->seal, &s->system_metrics, s->mmap, NULL, &s->system_journal); - free(fn); - - if (r >= 0) { - char fb[FORMAT_BYTES_MAX]; - - server_fix_perms(s, s->system_journal, 0); - server_driver_message(s, SD_ID128_NULL, "Allowing system journal files to grow to %s.", - format_bytes(fb, sizeof(fb), s->system_metrics.max_use)); - - } 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_parents(fn, 0755); - 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) { - char fb[FORMAT_BYTES_MAX]; - - server_fix_perms(s, s->runtime_journal, 0); - server_driver_message(s, SD_ID128_NULL, "Allowing runtime journal files to grow to %s.", - format_bytes(fb, sizeof(fb), s->runtime_metrics.max_use)); - } - } - - return r; -} - -static int server_flush_to_var(Server *s) { - int r; - sd_id128_t machine; - sd_journal *j = NULL; - - 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..."); - - r = sd_id128_get_machine(&machine); - if (r < 0) { - log_error("Failed to get machine id: %s", strerror(-r)); - 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_FOREACH(j) { - Object *o = NULL; - JournalFile *f; - - f = j->current_file; - assert(f && f->current_offset > 0); - - 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); - - 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); - - if (j) - sd_journal_close(j); - - return r; -} - -static int process_event(Server *s, struct epoll_event *ev) { - assert(s); - assert(ev); - - if (ev->data.fd == s->signal_fd) { - struct signalfd_siginfo sfsi; - ssize_t n; - - if (ev->events != EPOLLIN) { - log_error("Got invalid event from epoll."); - return -EIO; - } - - n = read(s->signal_fd, &sfsi, sizeof(sfsi)); - if (n != sizeof(sfsi)) { - - if (n >= 0) - return -EIO; - - if (errno == EINTR || errno == EAGAIN) - return 1; - - return -errno; - } - - log_info("Received SIG%s", signal_to_string(sfsi.ssi_signo)); - - if (sfsi.ssi_signo == SIGUSR1) { - touch("/run/systemd/journal/flushed"); - server_flush_to_var(s); - return 1; - } - - if (sfsi.ssi_signo == SIGUSR2) { - server_rotate(s); - server_vacuum(s); - return 1; - } - - return 0; - - } else if (ev->data.fd == s->dev_kmsg_fd) { - int r; - - if (ev->events != EPOLLIN) { - log_error("Got invalid event from epoll."); - return -EIO; - } - - r = server_read_dev_kmsg(s); - if (r < 0) - return r; - - return 1; - - } else if (ev->data.fd == s->native_fd || - ev->data.fd == s->syslog_fd) { - - if (ev->events != EPOLLIN) { - log_error("Got invalid event from epoll."); - return -EIO; - } - - for (;;) { - struct msghdr msghdr; - struct iovec iovec; - struct ucred *ucred = NULL; - struct timeval *tv = NULL; - struct cmsghdr *cmsg; - char *label = NULL; - size_t label_len = 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; - ssize_t n; - int v; - int *fds = NULL; - unsigned n_fds = 0; - - if (ioctl(ev->data.fd, SIOCINQ, &v) < 0) { - log_error("SIOCINQ failed: %m"); - return -errno; - } - - if (s->buffer_size < (size_t) v) { - void *b; - size_t l; - - l = MAX(LINE_MAX + (size_t) v, s->buffer_size * 2); - b = realloc(s->buffer, l+1); - - if (!b) { - log_error("Couldn't increase buffer."); - return -ENOMEM; - } - - s->buffer_size = l; - s->buffer = b; - } - - zero(iovec); - iovec.iov_base = s->buffer; - iovec.iov_len = s->buffer_size; - - zero(control); - zero(msghdr); - msghdr.msg_iov = &iovec; - msghdr.msg_iovlen = 1; - msghdr.msg_control = &control; - msghdr.msg_controllen = sizeof(control); - - n = recvmsg(ev->data.fd, &msghdr, MSG_DONTWAIT|MSG_CMSG_CLOEXEC); - if (n < 0) { - - if (errno == EINTR || errno == EAGAIN) - return 1; - - 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 (ev->data.fd == s->syslog_fd) { - char *e; - - if (n > 0 && n_fds == 0) { - e = memchr(s->buffer, '\n', n); - if (e) - *e = 0; - else - 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); - } - - return 1; - - } else if (ev->data.fd == s->stdout_fd) { - - if (ev->events != EPOLLIN) { - log_error("Got invalid event from epoll."); - return -EIO; - } - - stdout_stream_new(s); - return 1; - - } else { - StdoutStream *stream; - - if ((ev->events|EPOLLIN|EPOLLHUP) != (EPOLLIN|EPOLLHUP)) { - log_error("Got invalid event from epoll."); - return -EIO; - } - - /* If it is none of the well-known fds, it must be an - * stdout stream fd. Note that this is a bit ugly here - * (since we rely that none of the well-known fds - * could be interpreted as pointer), but nonetheless - * safe, since the well-known fds would never get an - * fd > 4096, i.e. beyond the first memory page */ - - stream = ev->data.ptr; - - if (stdout_stream_process(stream) <= 0) - stdout_stream_free(stream); - - return 1; - } - - log_error("Unknown event."); - return 0; -} - -static int open_signalfd(Server *s) { - sigset_t mask; - struct epoll_event ev; - - assert(s); - - assert_se(sigemptyset(&mask) == 0); - sigset_add_many(&mask, SIGINT, SIGTERM, SIGUSR1, SIGUSR2, -1); - assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0); - - s->signal_fd = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC); - if (s->signal_fd < 0) { - log_error("signalfd(): %m"); - return -errno; - } - - zero(ev); - ev.events = EPOLLIN; - ev.data.fd = s->signal_fd; - - if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->signal_fd, &ev) < 0) { - log_error("epoll_ctl(): %m"); - return -errno; - } - - return 0; -} - -static int server_parse_proc_cmdline(Server *s) { - char *line, *w, *state; - int r; - size_t l; - - if (detect_container(NULL) > 0) - return 0; - - r = read_one_line_file("/proc/cmdline", &line); - if (r < 0) { - log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r)); - return 0; - } - - FOREACH_WORD_QUOTED(w, l, line, state) { - char *word; - - word = strndup(w, l); - if (!word) { - r = -ENOMEM; - goto finish; - } - - 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")) - log_warning("Invalid systemd.journald parameter. Ignoring."); - - free(word); - } - - r = 0; - -finish: - free(line); - return r; -} - -static int server_parse_config_file(Server *s) { - FILE *f; - const char *fn; - int r; - - assert(s); - - fn = "/etc/systemd/journald.conf"; - f = fopen(fn, "re"); - if (!f) { - if (errno == ENOENT) - return 0; - - log_warning("Failed to open configuration file %s: %m", fn); - return -errno; - } - - r = config_parse(fn, f, "Journal\0", config_item_perf_lookup, (void*) journald_gperf_lookup, false, s); - if (r < 0) - log_warning("Failed to parse configuration file: %s", strerror(-r)); - - fclose(f); - - return r; -} - -static int server_init(Server *s) { - int n, r, fd; - - assert(s); - - zero(*s); - s->syslog_fd = s->native_fd = s->stdout_fd = s->signal_fd = s->epoll_fd = s->dev_kmsg_fd = -1; - s->compress = true; - s->seal = true; - - s->rate_limit_interval = DEFAULT_RATE_LIMIT_INTERVAL; - s->rate_limit_burst = DEFAULT_RATE_LIMIT_BURST; - - s->forward_to_syslog = true; - - s->max_level_store = LOG_DEBUG; - s->max_level_syslog = LOG_DEBUG; - s->max_level_kmsg = LOG_NOTICE; - s->max_level_console = LOG_INFO; - - 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); - - 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(); - - s->epoll_fd = epoll_create1(EPOLL_CLOEXEC); - if (s->epoll_fd < 0) { - log_error("Failed to create epoll object: %m"); - return -errno; - } - - 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) { - - 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 = open_signalfd(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 = system_journal_open(s); - if (r < 0) - return r; - - return 0; -} - -static 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 -} - -static 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); - - if (s->epoll_fd >= 0) - close_nointr_nofail(s->epoll_fd); - - if (s->signal_fd >= 0) - close_nointr_nofail(s->signal_fd); - - if (s->syslog_fd >= 0) - close_nointr_nofail(s->syslog_fd); - - if (s->native_fd >= 0) - close_nointr_nofail(s->native_fd); - - if (s->stdout_fd >= 0) - close_nointr_nofail(s->stdout_fd); - - if (s->dev_kmsg_fd >= 0) - close_nointr_nofail(s->dev_kmsg_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); - - if (s->mmap) - mmap_cache_unref(s->mmap); - - if (s->udev) - udev_unref(s->udev); -} int main(int argc, char *argv[]) { Server server; |