#include "cgroup-util.h"
#include "list.h"
#include "journal-rate-limit.h"
+#include "sd-journal.h"
+#include "sd-login.h"
+#include "journal-internal.h"
#define USER_JOURNALS_MAX 1024
#define STDOUT_STREAMS_MAX 4096
+#define DEFAULT_RATE_LIMIT_INTERVAL (10*USEC_PER_SEC)
+#define DEFAULT_RATE_LIMIT_BURST 200
+
+#define RECHECK_AVAILABLE_SPACE_USEC (30*USEC_PER_SEC)
+
+#define RECHECK_VAR_AVAILABLE_USEC (30*USEC_PER_SEC)
+
+#define SYSLOG_TIMEOUT_USEC (5*USEC_PER_SEC)
+
typedef struct StdoutStream StdoutStream;
typedef struct Server {
JournalRateLimit *rate_limit;
- JournalMetrics metrics;
- uint64_t max_use;
+ JournalMetrics runtime_metrics;
+ JournalMetrics system_metrics;
+
bool compress;
+ uint64_t cached_available_space;
+ usec_t cached_available_space_timestamp;
+
+ uint64_t var_available_timestamp;
+
LIST_HEAD(StdoutStream, stdout_streams);
unsigned n_stdout_streams;
} Server;
LIST_FIELDS(StdoutStream, stdout_stream);
};
+static int server_flush_to_var(Server *s);
+
static uint64_t available_space(Server *s) {
- char ids[33];
- sd_id128_t machine;
- char *p;
+ 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)
+ if (s->system_journal) {
f = "/var/log/journal/";
- else
+ 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)
sum += (uint64_t) st.st_blocks * (uint64_t) st.st_blksize;
}
- avail = sum >= s->max_use ? 0 : s->max_use - sum;
+ avail = sum >= m->max_use ? 0 : m->max_use - sum;
ss_avail = ss.f_bsize * ss.f_bavail;
- ss_avail = ss_avail < s->metrics.keep_free ? 0 : ss_avail - s->metrics.keep_free;
+ 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);
assert(s);
- /* We split up user logs only on /var, not on /run */
- if (!s->system_journal)
+ /* 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;
fix_perms(f, uid);
- f->metrics = s->metrics;
+ f->metrics = s->system_metrics;
f->compress = s->compress;
r = hashmap_put(s->user_journals, UINT32_TO_PTR(uid), f);
return f;
}
-static void server_vacuum(Server *s) {
- Iterator i;
+static void server_rotate(Server *s) {
+ JournalFile *f;
void *k;
- char *p;
- char ids[33];
- sd_id128_t machine;
+ Iterator i;
int r;
- JournalFile *f;
log_info("Rotating...");
else
hashmap_replace(s->user_journals, k, f);
}
+}
+
+static void server_vacuum(Server *s) {
+ char *p;
+ char ids[33];
+ sd_id128_t machine;
+ int r;
log_info("Vacuuming...");
return;
}
- if (asprintf(&p, "/var/log/journal/%s", sd_id128_to_string(machine, ids)) < 0) {
- log_error("Out of memory.");
- return;
+ sd_id128_to_string(machine, ids);
+
+ if (s->system_journal) {
+ if (asprintf(&p, "/var/log/journal/%s", ids) < 0) {
+ log_error("Out of memory.");
+ return;
+ }
+
+ r = journal_directory_vacuum(p, s->system_metrics.max_use, s->system_metrics.keep_free);
+ if (r < 0 && r != -ENOENT)
+ log_error("Failed to vacuum %s: %s", p, strerror(-r));
+ free(p);
}
- r = journal_directory_vacuum(p, s->max_use, s->metrics.keep_free);
- if (r < 0 && r != -ENOENT)
- log_error("Failed to vacuum %s: %s", p, strerror(-r));
- free(p);
- if (asprintf(&p, "/run/log/journal/%s", ids) < 0) {
- log_error("Out of memory.");
- return;
+ if (s->runtime_journal) {
+ if (asprintf(&p, "/run/log/journal/%s", ids) < 0) {
+ log_error("Out of memory.");
+ return;
+ }
+
+ r = journal_directory_vacuum(p, s->runtime_metrics.max_use, s->runtime_metrics.keep_free);
+ if (r < 0 && r != -ENOENT)
+ log_error("Failed to vacuum %s: %s", p, strerror(-r));
+ free(p);
}
- r = journal_directory_vacuum(p, s->max_use, s->metrics.keep_free);
- 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) {
return NULL;
}
- if (streq(init_path, "/"))
+ 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))
- path = process_path + strlen(init_path);
- else
+ 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;
*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;
+ *exe = NULL, *cgroup = NULL, *session = NULL,
+ *owner_uid = NULL, *service = NULL;
char idbuf[33];
sd_id128_t id;
assert(s);
assert(iovec);
assert(n > 0);
- assert(n + 13 <= m);
+ assert(n + 16 <= m);
if (ucred) {
- uint32_t session;
- char *path;
+ uint32_t audit;
+ uid_t owner;
realuid = ucred->uid;
r = get_process_comm(ucred->pid, &t);
if (r >= 0) {
comm = strappend("_COMM=", t);
+ free(t);
+
if (comm)
IOVEC_SET_STRING(iovec[n++], comm);
- free(t);
}
r = get_process_exe(ucred->pid, &t);
if (r >= 0) {
exe = strappend("_EXE=", t);
+ free(t);
+
if (comm)
IOVEC_SET_STRING(iovec[n++], exe);
- free(t);
}
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);
- free(t);
}
- r = audit_session_from_pid(ucred->pid, &session);
+ r = audit_session_from_pid(ucred->pid, &audit);
if (r >= 0)
- if (asprintf(&audit_session, "_AUDIT_SESSION=%lu", (unsigned long) session) >= 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 (asprintf(&audit_loginuid, "_AUDIT_LOGINUID=%lu", (unsigned long) loginuid) >= 0)
IOVEC_SET_STRING(iovec[n++], audit_loginuid);
- path = shortened_cgroup_path(ucred->pid);
- if (path) {
- cgroup = strappend("_SYSTEMD_CGROUP=", path);
+ t = shortened_cgroup_path(ucred->pid);
+ if (t) {
+ cgroup = strappend("_SYSTEMD_CGROUP=", t);
+ free(t);
+
if (cgroup)
IOVEC_SET_STRING(iovec[n++], cgroup);
+ }
- free(path);
+ 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_service(ucred->pid, &t) >= 0) {
+ service = strappend("_SYSTEMD_SERVICE=", t);
+ free(t);
+
+ if (service)
+ IOVEC_SET_STRING(iovec[n++], service);
+ }
+
+ 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);
}
if (tv) {
t = gethostname_malloc();
if (t) {
hostname = strappend("_HOSTNAME=", t);
+ free(t);
if (hostname)
IOVEC_SET_STRING(iovec[n++], hostname);
- free(t);
}
assert(n <= m);
+ server_flush_to_var(s);
+
retry:
f = find_journal(s, realuid == 0 ? 0 : loginuid);
if (!f)
if (r == -E2BIG && !vacuumed) {
log_info("Allocation limit reached.");
+ server_rotate(s);
server_vacuum(s);
vacuumed = true;
free(audit_session);
free(audit_loginuid);
free(cgroup);
+ free(session);
+ free(owner_uid);
+ free(service);
}
static void dispatch_message(Server *s,
struct timeval *tv,
int priority) {
int rl;
- char *path, *c;
+ char *path = NULL, *c;
assert(s);
assert(iovec || n == 0);
if (rl > 1) {
int j = 0;
char suppress_message[LINE_MAX];
- struct iovec suppress_iovec[15];
+ struct iovec suppress_iovec[18];
/* Write a suppression message if we suppressed something */
static void process_syslog_message(Server *s, const char *buf, struct ucred *ucred, struct timeval *tv) {
char *message = NULL, *syslog_priority = NULL, *syslog_facility = NULL;
- struct iovec iovec[16];
+ struct iovec iovec[19];
unsigned n = 0;
int priority = LOG_USER | LOG_INFO;
/* A property follows */
- if (n+13 >= m) {
+ if (n+16 >= m) {
struct iovec *c;
unsigned u;
- u = MAX((n+13U) * 2U, 4U);
+ u = MAX((n+16U) * 2U, 4U);
c = realloc(iovec, u * sizeof(struct iovec));
if (!c) {
log_error("Out of memory");
}
static int stdout_stream_log(StdoutStream *s, const char *p, size_t l) {
- struct iovec iovec[15];
+ struct iovec iovec[18];
char *message = NULL, *syslog_priority = NULL;
unsigned n = 0;
size_t tag_len;
return r;
}
+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) {
+
+ /* First try to create the machine path, but not the prefix */
+ fn = strappend("/var/log/journal/", ids);
+ if (!fn)
+ return -ENOMEM;
+ (void) mkdir(fn, 0755);
+ free(fn);
+
+ /* The create the system journal file */
+ fn = join("/var/log/journal/", ids, "/system.journal", NULL);
+ if (!fn)
+ return -ENOMEM;
+
+ r = journal_file_open(fn, O_RDWR|O_CREAT, 0640, NULL, &s->system_journal);
+ free(fn);
+
+ if (r >= 0) {
+ journal_default_metrics(&s->system_metrics, s->system_journal->fd);
+
+ s->system_journal->metrics = s->system_metrics;
+ s->system_journal->compress = s->compress;
+
+ fix_perms(s->system_journal, 0);
+ } else if (r < 0) {
+
+ if (r != -ENOENT && r != -EROFS)
+ log_warning("Failed to open system journal: %s", strerror(-r));
+
+ r = 0;
+ }
+ }
+
+ if (!s->runtime_journal) {
+
+ fn = join("/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, 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(fn, O_RDWR|O_CREAT, 0640, 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) {
+ journal_default_metrics(&s->runtime_metrics, s->runtime_journal->fd);
+
+ s->runtime_journal->metrics = s->runtime_metrics;
+ s->runtime_journal->compress = s->compress;
+
+ fix_perms(s->runtime_journal, 0);
+ }
+ }
+
+ return r;
+}
+
+static int server_flush_to_var(Server *s) {
+ char path[] = "/run/log/journal/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
+ Object *o = NULL;
+ int r;
+ sd_id128_t machine;
+ sd_journal *j;
+ usec_t ts;
+
+ assert(s);
+
+ if (!s->runtime_journal)
+ return 0;
+
+ ts = now(CLOCK_MONOTONIC);
+ if (s->var_available_timestamp + RECHECK_VAR_AVAILABLE_USEC > ts)
+ return 0;
+
+ s->var_available_timestamp = ts;
+
+ system_journal_open(s);
+
+ if (!s->system_journal)
+ return 0;
+
+ 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) {
+ 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 == -E2BIG) {
+ log_info("Allocation limit reached.");
+
+ journal_file_post_change(s->system_journal);
+ server_rotate(s);
+ server_vacuum(s);
+
+ 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) {
+ sd_id128_to_string(machine, path + 17);
+ rm_rf(path, false, true, false);
+ }
+
+ return r;
+}
+
+static void forward_syslog(Server *s, const void *buffer, size_t length, struct ucred *ucred, struct timeval *tv) {
+ struct msghdr msghdr;
+ struct iovec iovec;
+ struct cmsghdr *cmsg;
+ union {
+ struct cmsghdr cmsghdr;
+ uint8_t buf[CMSG_SPACE(sizeof(struct ucred)) +
+ CMSG_SPACE(sizeof(struct timeval))];
+ } control;
+ union sockaddr_union sa;
+
+ assert(s);
+
+ zero(msghdr);
+
+ zero(iovec);
+ iovec.iov_base = (void*) buffer;
+ iovec.iov_len = length;
+ msghdr.msg_iov = &iovec;
+ msghdr.msg_iovlen = 1;
+
+ zero(sa);
+ sa.un.sun_family = AF_UNIX;
+ strncpy(sa.un.sun_path, "/run/systemd/syslog", sizeof(sa.un.sun_path));
+ msghdr.msg_name = &sa;
+ msghdr.msg_namelen = offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path);
+
+ zero(control);
+ msghdr.msg_control = &control;
+ msghdr.msg_controllen = sizeof(control);
+
+ cmsg = CMSG_FIRSTHDR(&msghdr);
+ cmsg->cmsg_level = SOL_SOCKET;
+ cmsg->cmsg_type = SCM_CREDENTIALS;
+ cmsg->cmsg_len = CMSG_LEN(sizeof(struct ucred));
+ memcpy(CMSG_DATA(cmsg), ucred, sizeof(struct ucred));
+ msghdr.msg_controllen = cmsg->cmsg_len;
+
+ /* Forward the syslog message we received via /dev/log to
+ * /run/systemd/syslog. Unfortunately we currently can't set
+ * the SO_TIMESTAMP auxiliary data, and hence we don't. */
+
+ if (sendmsg(s->syslog_fd, &msghdr, MSG_NOSIGNAL) >= 0)
+ return;
+
+ if (errno == ESRCH) {
+ struct ucred u;
+
+ /* Hmm, presumably the sender process vanished
+ * by now, so let's fix it as good as we
+ * can, and retry */
+
+ u = *ucred;
+ u.pid = getpid();
+ memcpy(CMSG_DATA(cmsg), &u, sizeof(struct ucred));
+
+ if (sendmsg(s->syslog_fd, &msghdr, MSG_NOSIGNAL) >= 0)
+ return;
+ }
+
+ log_debug("Failed to forward syslog message: %m");
+}
+
static int process_event(Server *s, struct epoll_event *ev) {
assert(s);
return -errno;
}
+ if (sfsi.ssi_signo == SIGUSR1) {
+ server_flush_to_var(s);
+ return 0;
+ }
+
log_debug("Received SIG%s", signal_to_string(sfsi.ssi_signo));
return 0;
else
s->buffer[n] = 0;
+ forward_syslog(s, s->buffer, n, ucred, tv);
process_syslog_message(s, strstrip(s->buffer), ucred, tv);
} else
process_native_message(s, s->buffer, n, ucred, tv);
return 0;
}
-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;
-
- /* First try to create the machine path, but not the prefix */
- fn = strappend("/var/log/journal/", sd_id128_to_string(machine, ids));
- if (!fn)
- return -ENOMEM;
- (void) mkdir(fn, 0755);
- free(fn);
-
- /* The create the system journal file */
- fn = join("/var/log/journal/", ids, "/system.journal", NULL);
- if (!fn)
- return -ENOMEM;
-
- r = journal_file_open(fn, O_RDWR|O_CREAT, 0640, NULL, &s->system_journal);
- free(fn);
-
- if (r >= 0) {
- s->system_journal->metrics = s->metrics;
- s->system_journal->compress = s->compress;
-
- fix_perms(s->system_journal, 0);
- return r;
- }
-
- if (r < 0 && r != -ENOENT) {
- log_error("Failed to open system journal: %s", strerror(-r));
- return r;
- }
-
- /* /var didn't work, so try /run, but this time we
- * create the prefix too */
- fn = join("/run/log/journal/", ids, "/system.journal", NULL);
- if (!fn)
- return -ENOMEM;
-
- (void) mkdir_parents(fn, 0755);
- r = journal_file_open(fn, O_RDWR|O_CREAT, 0640, NULL, &s->runtime_journal);
- free(fn);
-
- if (r < 0) {
- log_error("Failed to open runtime journal: %s", strerror(-r));
- return r;
- }
-
- s->runtime_journal->metrics = s->metrics;
- s->runtime_journal->compress = s->compress;
-
- fix_perms(s->runtime_journal, 0);
- return r;
-}
-
static int open_syslog_socket(Server *s) {
union sockaddr_union sa;
int one, r;
struct epoll_event ev;
+ struct timeval tv;
assert(s);
zero(sa);
sa.un.sun_family = AF_UNIX;
- strncpy(sa.un.sun_path, "/run/systemd/syslog", sizeof(sa.un.sun_path));
+ strncpy(sa.un.sun_path, "/dev/log", sizeof(sa.un.sun_path));
unlink(sa.un.sun_path);
return -errno;
}
+ /* Since we use the same socket for forwarding this to some
+ * other syslog implementation, make sure we don't hang
+ * forever */
+ timeval_store(&tv, SYSLOG_TIMEOUT_USEC);
+ if (setsockopt(s->syslog_fd, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv)) < 0) {
+ log_error("SO_SNDTIMEO failed: %m");
+ return -errno;
+ }
+
zero(ev);
ev.events = EPOLLIN;
ev.data.fd = s->syslog_fd;
assert(s);
assert_se(sigemptyset(&mask) == 0);
- sigset_add_many(&mask, SIGINT, SIGTERM, -1);
+ sigset_add_many(&mask, SIGINT, SIGTERM, SIGUSR1, -1);
assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0);
s->signal_fd = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC);
zero(*s);
s->syslog_fd = s->native_fd = s->stdout_fd = s->signal_fd = s->epoll_fd = -1;
- s->metrics.max_size = DEFAULT_MAX_SIZE;
- s->metrics.min_size = DEFAULT_MIN_SIZE;
- s->metrics.keep_free = DEFAULT_KEEP_FREE;
- s->max_use = DEFAULT_MAX_USE;
s->compress = true;
+ memset(&s->system_metrics, 0xFF, sizeof(s->system_metrics));
+ memset(&s->runtime_metrics, 0xFF, sizeof(s->runtime_metrics));
+
s->user_journals = hashmap_new(trivial_hash_func, trivial_compare_func);
if (!s->user_journals) {
log_error("Out of memory.");
if (r < 0)
return r;
- s->rate_limit = journal_rate_limit_new(10*USEC_PER_SEC, 2);
+ s->rate_limit = journal_rate_limit_new(DEFAULT_RATE_LIMIT_INTERVAL, DEFAULT_RATE_LIMIT_BURST);
if (!s->rate_limit)
return -ENOMEM;
if (s->rate_limit)
journal_rate_limit_free(s->rate_limit);
+
+ free(s->buffer);
}
int main(int argc, char *argv[]) {
}
log_set_target(LOG_TARGET_CONSOLE);
- log_set_max_level(LOG_DEBUG);
log_parse_environment();
log_open();
"READY=1\n"
"STATUS=Processing requests...");
+ server_vacuum(&server);
+ server_flush_to_var(&server);
+
for (;;) {
struct epoll_event event;
~ianmdlvl / elogind.git / blobdiff