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-rw-r--r--src/journal/journald.c1476
1 files changed, 1 insertions, 1475 deletions
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;
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-17 05:37:38 +0000