X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fjournal%2Fjournald.c;h=5836119bede27ddf963370ac11a04a8368550801;hb=3b7124a8db56ed57525b9ecfd19cfdc8c9facba0;hp=d0c96186fa3d505169a45706ea20f6527c5ef32c;hpb=e7573d7fa9366f72fb81e0a02d82dbb0dfd106aa;p=elogind.git diff --git a/src/journal/journald.c b/src/journal/journald.c index d0c96186f..5836119be 100644 --- a/src/journal/journald.c +++ b/src/journal/journald.c @@ -29,7 +29,9 @@ #include #include #include +#include +#include #include #include #include @@ -44,12 +46,18 @@ #include "socket-util.h" #include "cgroup-util.h" #include "list.h" +#include "virt.h" +#include "missing.h" +#include "conf-parser.h" #include "journal-rate-limit.h" #include "journal-internal.h" -#include "conf-parser.h" +#include "journal-vacuum.h" +#include "journal-authenticate.h" #include "journald.h" -#include "virt.h" -#include "missing.h" +#include "journald-kmsg.h" +#include "journald-syslog.h" +#include "journald-stream.h" +#include "journald-console.h" #ifdef HAVE_ACL #include @@ -62,54 +70,14 @@ #endif #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 N_IOVEC_META_FIELDS 17 -#define N_IOVEC_KERNEL_FIELDS 64 - #define ENTRY_SIZE_MAX (1024*1024*32) -typedef enum StdoutStreamState { - STDOUT_STREAM_IDENTIFIER, - STDOUT_STREAM_UNIT_ID, - STDOUT_STREAM_PRIORITY, - STDOUT_STREAM_LEVEL_PREFIX, - STDOUT_STREAM_FORWARD_TO_SYSLOG, - STDOUT_STREAM_FORWARD_TO_KMSG, - STDOUT_STREAM_FORWARD_TO_CONSOLE, - STDOUT_STREAM_RUNNING -} StdoutStreamState; - -struct StdoutStream { - Server *server; - StdoutStreamState state; - - int fd; - - struct ucred ucred; -#ifdef HAVE_SELINUX - security_context_t security_context; -#endif - - char *identifier; - char *unit_id; - int priority; - bool level_prefix:1; - bool forward_to_syslog:1; - bool forward_to_kmsg:1; - bool forward_to_console:1; - - char buffer[LINE_MAX+1]; - size_t length; - - LIST_FIELDS(StdoutStream, stdout_stream); -}; - static const char* const storage_table[] = { [STORAGE_AUTO] = "auto", [STORAGE_VOLATILE] = "volatile", @@ -280,7 +248,6 @@ static JournalFile* find_journal(Server *s, uid_t uid) { char *p; int r; JournalFile *f; - char ids[33]; sd_id128_t machine; assert(s); @@ -304,7 +271,8 @@ static JournalFile* find_journal(Server *s, uid_t uid) { if (f) return f; - if (asprintf(&p, "/var/log/journal/%s/user-%lu.journal", sd_id128_to_string(machine, ids), (unsigned long) uid) < 0) + 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) { @@ -314,7 +282,7 @@ static JournalFile* find_journal(Server *s, uid_t uid) { journal_file_close(f); } - r = journal_file_open_reliably(p, O_RDWR|O_CREAT, 0640, &s->system_metrics, s->system_journal, &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) @@ -340,7 +308,7 @@ static void server_rotate(Server *s) { log_info("Rotating..."); if (s->runtime_journal) { - r = journal_file_rotate(&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)); @@ -351,7 +319,7 @@ static void server_rotate(Server *s) { } if (s->system_journal) { - r = journal_file_rotate(&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)); @@ -363,7 +331,7 @@ static void server_rotate(Server *s) { } HASHMAP_FOREACH_KEY(f, k, s->user_journals, i) { - r = journal_file_rotate(&f); + 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)); @@ -711,7 +679,7 @@ static void dispatch_message_real( free(selinux_context); } -static void driver_message(Server *s, sd_id128_t message_id, const char *format, ...) { +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]; @@ -744,13 +712,15 @@ static void driver_message(Server *s, sd_id128_t message_id, const char *format, dispatch_message_real(s, iovec, n, ELEMENTSOF(iovec), &ucred, NULL, NULL, 0, NULL); } -static void 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) { +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; @@ -795,7 +765,7 @@ static void dispatch_message(Server *s, /* Write a suppression message if we suppressed something */ if (rl > 1) - driver_message(s, SD_MESSAGE_JOURNAL_DROPPED, "Suppressed %u messages from %s", rl - 1, path); + server_driver_message(s, SD_MESSAGE_JOURNAL_DROPPED, "Suppressed %u messages from %s", rl - 1, path); free(path); @@ -803,374 +773,6 @@ finish: dispatch_message_real(s, iovec, n, m, ucred, tv, label, label_len, unit_id); } -static void forward_syslog_iovec(Server *s, const struct iovec *iovec, unsigned n_iovec, struct ucred *ucred, struct timeval *tv) { - struct msghdr msghdr; - struct cmsghdr *cmsg; - union { - struct cmsghdr cmsghdr; - uint8_t buf[CMSG_SPACE(sizeof(struct ucred))]; - } control; - union sockaddr_union sa; - - assert(s); - assert(iovec); - assert(n_iovec > 0); - - zero(msghdr); - msghdr.msg_iov = (struct iovec*) iovec; - msghdr.msg_iovlen = n_iovec; - - zero(sa); - sa.un.sun_family = AF_UNIX; - strncpy(sa.un.sun_path, "/run/systemd/journal/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); - - if (ucred) { - 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; - - /* The socket is full? I guess the syslog implementation is - * too slow, and we shouldn't wait for that... */ - if (errno == EAGAIN) - return; - - if (ucred && 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; - - if (errno == EAGAIN) - return; - } - - if (errno != ENOENT) - log_debug("Failed to forward syslog message: %m"); -} - -static void forward_syslog_raw(Server *s, int priority, const char *buffer, struct ucred *ucred, struct timeval *tv) { - struct iovec iovec; - - assert(s); - assert(buffer); - - if (LOG_PRI(priority) > s->max_level_syslog) - return; - - IOVEC_SET_STRING(iovec, buffer); - forward_syslog_iovec(s, &iovec, 1, ucred, tv); -} - -static void forward_syslog(Server *s, int priority, const char *identifier, const char *message, struct ucred *ucred, struct timeval *tv) { - struct iovec iovec[5]; - char header_priority[6], header_time[64], header_pid[16]; - int n = 0; - time_t t; - struct tm *tm; - char *ident_buf = NULL; - - assert(s); - assert(priority >= 0); - assert(priority <= 999); - assert(message); - - if (LOG_PRI(priority) > s->max_level_syslog) - return; - - /* First: priority field */ - snprintf(header_priority, sizeof(header_priority), "<%i>", priority); - char_array_0(header_priority); - IOVEC_SET_STRING(iovec[n++], header_priority); - - /* Second: timestamp */ - t = tv ? tv->tv_sec : ((time_t) (now(CLOCK_REALTIME) / USEC_PER_SEC)); - tm = localtime(&t); - if (!tm) - return; - if (strftime(header_time, sizeof(header_time), "%h %e %T ", tm) <= 0) - return; - IOVEC_SET_STRING(iovec[n++], header_time); - - /* Third: identifier and PID */ - if (ucred) { - if (!identifier) { - get_process_comm(ucred->pid, &ident_buf); - identifier = ident_buf; - } - - snprintf(header_pid, sizeof(header_pid), "[%lu]: ", (unsigned long) ucred->pid); - char_array_0(header_pid); - - if (identifier) - IOVEC_SET_STRING(iovec[n++], identifier); - - IOVEC_SET_STRING(iovec[n++], header_pid); - } else if (identifier) { - IOVEC_SET_STRING(iovec[n++], identifier); - IOVEC_SET_STRING(iovec[n++], ": "); - } - - /* Fourth: message */ - IOVEC_SET_STRING(iovec[n++], message); - - forward_syslog_iovec(s, iovec, n, ucred, tv); - - free(ident_buf); -} - -static int fixup_priority(int priority) { - - if ((priority & LOG_FACMASK) == 0) - return (priority & LOG_PRIMASK) | LOG_USER; - - return priority; -} - -static void forward_kmsg(Server *s, int priority, const char *identifier, const char *message, struct ucred *ucred) { - struct iovec iovec[5]; - char header_priority[6], header_pid[16]; - int n = 0; - char *ident_buf = NULL; - - assert(s); - assert(priority >= 0); - assert(priority <= 999); - assert(message); - - if (_unlikely_(LOG_PRI(priority) > s->max_level_kmsg)) - return; - - if (_unlikely_(s->dev_kmsg_fd < 0)) - return; - - /* Never allow messages with kernel facility to be written to - * kmsg, regardless where the data comes from. */ - priority = fixup_priority(priority); - - /* First: priority field */ - snprintf(header_priority, sizeof(header_priority), "<%i>", priority); - char_array_0(header_priority); - IOVEC_SET_STRING(iovec[n++], header_priority); - - /* Second: identifier and PID */ - if (ucred) { - if (!identifier) { - get_process_comm(ucred->pid, &ident_buf); - identifier = ident_buf; - } - - snprintf(header_pid, sizeof(header_pid), "[%lu]: ", (unsigned long) ucred->pid); - char_array_0(header_pid); - - if (identifier) - IOVEC_SET_STRING(iovec[n++], identifier); - - IOVEC_SET_STRING(iovec[n++], header_pid); - } else if (identifier) { - IOVEC_SET_STRING(iovec[n++], identifier); - IOVEC_SET_STRING(iovec[n++], ": "); - } - - /* Fourth: message */ - IOVEC_SET_STRING(iovec[n++], message); - IOVEC_SET_STRING(iovec[n++], "\n"); - - if (writev(s->dev_kmsg_fd, iovec, n) < 0) - log_debug("Failed to write to /dev/kmsg for logging: %s", strerror(errno)); - - free(ident_buf); -} - -static void forward_console(Server *s, int priority, const char *identifier, const char *message, struct ucred *ucred) { - struct iovec iovec[4]; - char header_pid[16]; - int n = 0, fd; - char *ident_buf = NULL; - const char *tty; - - assert(s); - assert(message); - - if (LOG_PRI(priority) > s->max_level_console) - return; - - /* First: identifier and PID */ - if (ucred) { - if (!identifier) { - get_process_comm(ucred->pid, &ident_buf); - identifier = ident_buf; - } - - snprintf(header_pid, sizeof(header_pid), "[%lu]: ", (unsigned long) ucred->pid); - char_array_0(header_pid); - - if (identifier) - IOVEC_SET_STRING(iovec[n++], identifier); - - IOVEC_SET_STRING(iovec[n++], header_pid); - } else if (identifier) { - IOVEC_SET_STRING(iovec[n++], identifier); - IOVEC_SET_STRING(iovec[n++], ": "); - } - - /* Third: message */ - IOVEC_SET_STRING(iovec[n++], message); - IOVEC_SET_STRING(iovec[n++], "\n"); - - tty = s->tty_path ? s->tty_path : "/dev/console"; - - fd = open_terminal(tty, O_WRONLY|O_NOCTTY|O_CLOEXEC); - if (fd < 0) { - log_debug("Failed to open %s for logging: %s", tty, strerror(errno)); - goto finish; - } - - if (writev(fd, iovec, n) < 0) - log_debug("Failed to write to %s for logging: %s", tty, strerror(errno)); - - close_nointr_nofail(fd); - -finish: - free(ident_buf); -} - -static void read_identifier(const char **buf, char **identifier, char **pid) { - const char *p; - char *t; - size_t l, e; - - assert(buf); - assert(identifier); - assert(pid); - - p = *buf; - - p += strspn(p, WHITESPACE); - l = strcspn(p, WHITESPACE); - - if (l <= 0 || - p[l-1] != ':') - return; - - e = l; - l--; - - if (p[l-1] == ']') { - size_t k = l-1; - - for (;;) { - - if (p[k] == '[') { - t = strndup(p+k+1, l-k-2); - if (t) - *pid = t; - - l = k; - break; - } - - if (k == 0) - break; - - k--; - } - } - - t = strndup(p, l); - if (t) - *identifier = t; - - *buf = p + e; - *buf += strspn(*buf, WHITESPACE); -} - -static void process_syslog_message(Server *s, const char *buf, struct ucred *ucred, struct timeval *tv, const char *label, size_t label_len) { - char *message = NULL, *syslog_priority = NULL, *syslog_facility = NULL, *syslog_identifier = NULL, *syslog_pid = NULL; - struct iovec iovec[N_IOVEC_META_FIELDS + 6]; - unsigned n = 0; - int priority = LOG_USER | LOG_INFO; - char *identifier = NULL, *pid = NULL; - const char *orig; - - assert(s); - assert(buf); - - orig = buf; - parse_syslog_priority((char**) &buf, &priority); - - if (s->forward_to_syslog) - forward_syslog_raw(s, priority, orig, ucred, tv); - - skip_syslog_date((char**) &buf); - read_identifier(&buf, &identifier, &pid); - - if (s->forward_to_kmsg) - forward_kmsg(s, priority, identifier, buf, ucred); - - if (s->forward_to_console) - forward_console(s, priority, identifier, buf, ucred); - - IOVEC_SET_STRING(iovec[n++], "_TRANSPORT=syslog"); - - if (asprintf(&syslog_priority, "PRIORITY=%i", priority & LOG_PRIMASK) >= 0) - IOVEC_SET_STRING(iovec[n++], syslog_priority); - - if (priority & LOG_FACMASK) - if (asprintf(&syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority)) >= 0) - IOVEC_SET_STRING(iovec[n++], syslog_facility); - - if (identifier) { - syslog_identifier = strappend("SYSLOG_IDENTIFIER=", identifier); - if (syslog_identifier) - IOVEC_SET_STRING(iovec[n++], syslog_identifier); - } - - if (pid) { - syslog_pid = strappend("SYSLOG_PID=", pid); - if (syslog_pid) - IOVEC_SET_STRING(iovec[n++], syslog_pid); - } - - message = strappend("MESSAGE=", buf); - if (message) - IOVEC_SET_STRING(iovec[n++], message); - - dispatch_message(s, iovec, n, ELEMENTSOF(iovec), ucred, tv, label, label_len, NULL, priority); - - free(message); - free(identifier); - free(pid); - free(syslog_priority); - free(syslog_facility); - free(syslog_identifier); - free(syslog_pid); -} - static bool valid_user_field(const char *p, size_t l) { const char *a; @@ -1239,7 +841,7 @@ static void process_native_message( if (e == p) { /* Entry separator */ - dispatch_message(s, iovec, n, m, ucred, tv, label, label_len, NULL, priority); + server_dispatch_message(s, iovec, n, m, ucred, tv, label, label_len, NULL, priority); n = 0; priority = LOG_INFO; @@ -1380,16 +982,16 @@ static void process_native_message( if (message) { if (s->forward_to_syslog) - forward_syslog(s, priority, identifier, message, ucred, tv); + server_forward_syslog(s, priority, identifier, message, ucred, tv); if (s->forward_to_kmsg) - forward_kmsg(s, priority, identifier, message, ucred); + server_forward_kmsg(s, priority, identifier, message, ucred); if (s->forward_to_console) - forward_console(s, priority, identifier, message, ucred); + server_forward_console(s, priority, identifier, message, ucred); } - dispatch_message(s, iovec, n, m, ucred, tv, label, label_len, NULL, priority); + server_dispatch_message(s, iovec, n, m, ucred, tv, label, label_len, NULL, priority); finish: for (j = 0; j < n; j++) { @@ -1458,608 +1060,106 @@ static void process_native_file( free(p); } -static int stdout_stream_log(StdoutStream *s, const char *p) { - struct iovec iovec[N_IOVEC_META_FIELDS + 5]; - char *message = NULL, *syslog_priority = NULL, *syslog_facility = NULL, *syslog_identifier = NULL; - unsigned n = 0; - int priority; - char *label = NULL; - size_t label_len = 0; - - assert(s); - assert(p); +static int system_journal_open(Server *s) { + int r; + char *fn; + sd_id128_t machine; + char ids[33]; - if (isempty(p)) - return 0; + r = sd_id128_get_machine(&machine); + if (r < 0) + return r; - priority = s->priority; + sd_id128_to_string(machine, ids); - if (s->level_prefix) - parse_syslog_priority((char**) &p, &priority); + if (!s->system_journal && + (s->storage == STORAGE_PERSISTENT || s->storage == STORAGE_AUTO) && + access("/run/systemd/journal/flushed", F_OK) >= 0) { - if (s->forward_to_syslog || s->server->forward_to_syslog) - forward_syslog(s->server, fixup_priority(priority), s->identifier, p, &s->ucred, NULL); + /* 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->forward_to_kmsg || s->server->forward_to_kmsg) - forward_kmsg(s->server, priority, s->identifier, p, &s->ucred); + if (s->storage == STORAGE_PERSISTENT) + (void) mkdir("/var/log/journal/", 0755); - if (s->forward_to_console || s->server->forward_to_console) - forward_console(s->server, priority, s->identifier, p, &s->ucred); + fn = strappend("/var/log/journal/", ids); + if (!fn) + return -ENOMEM; - IOVEC_SET_STRING(iovec[n++], "_TRANSPORT=stdout"); + (void) mkdir(fn, 0755); + free(fn); - if (asprintf(&syslog_priority, "PRIORITY=%i", priority & LOG_PRIMASK) >= 0) - IOVEC_SET_STRING(iovec[n++], syslog_priority); + fn = strjoin("/var/log/journal/", ids, "/system.journal", NULL); + if (!fn) + return -ENOMEM; - if (priority & LOG_FACMASK) - if (asprintf(&syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority)) >= 0) - IOVEC_SET_STRING(iovec[n++], syslog_facility); + 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 (s->identifier) { - syslog_identifier = strappend("SYSLOG_IDENTIFIER=", s->identifier); - if (syslog_identifier) - IOVEC_SET_STRING(iovec[n++], syslog_identifier); - } + if (r >= 0) + server_fix_perms(s, s->system_journal, 0); + else if (r < 0) { - message = strappend("MESSAGE=", p); - if (message) - IOVEC_SET_STRING(iovec[n++], message); + if (r != -ENOENT && r != -EROFS) + log_warning("Failed to open system journal: %s", strerror(-r)); -#ifdef HAVE_SELINUX - if (s->security_context) { - label = (char*) s->security_context; - label_len = strlen((char*) s->security_context); + r = 0; + } } -#endif - dispatch_message(s->server, iovec, n, ELEMENTSOF(iovec), &s->ucred, NULL, label, label_len, s->unit_id, priority); + if (!s->runtime_journal && + (s->storage != STORAGE_NONE)) { - free(message); - free(syslog_priority); - free(syslog_facility); - free(syslog_identifier); + fn = strjoin("/run/log/journal/", ids, "/system.journal", NULL); + if (!fn) + return -ENOMEM; - return 0; -} + if (s->system_journal) { -static int stdout_stream_line(StdoutStream *s, char *p) { - int r; + /* Try to open the runtime journal, but only + * if it already exists, so that we can flush + * it into the system journal */ - assert(s); - assert(p); + r = journal_file_open(fn, O_RDWR, 0640, s->compress, false, &s->runtime_metrics, s->mmap, NULL, &s->runtime_journal); + free(fn); - p = strstrip(p); + if (r < 0) { + if (r != -ENOENT) + log_warning("Failed to open runtime journal: %s", strerror(-r)); - switch (s->state) { + r = 0; + } - case STDOUT_STREAM_IDENTIFIER: - if (isempty(p)) - s->identifier = NULL; - else { - s->identifier = strdup(p); - if (!s->identifier) - return log_oom(); - } + } else { - s->state = STDOUT_STREAM_UNIT_ID; - return 0; + /* OK, we really need the runtime journal, so create + * it if necessary. */ - case STDOUT_STREAM_UNIT_ID: - if (s->ucred.uid == 0) { - if (isempty(p)) - s->unit_id = NULL; - else { - s->unit_id = strdup(p); - if (!s->unit_id) - return log_oom(); + (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; } } - s->state = STDOUT_STREAM_PRIORITY; - return 0; + if (s->runtime_journal) + server_fix_perms(s, s->runtime_journal, 0); + } - case STDOUT_STREAM_PRIORITY: - r = safe_atoi(p, &s->priority); - if (r < 0 || s->priority <= 0 || s->priority >= 999) { - log_warning("Failed to parse log priority line."); - return -EINVAL; - } + return r; +} - s->state = STDOUT_STREAM_LEVEL_PREFIX; - return 0; - - case STDOUT_STREAM_LEVEL_PREFIX: - r = parse_boolean(p); - if (r < 0) { - log_warning("Failed to parse level prefix line."); - return -EINVAL; - } - - s->level_prefix = !!r; - s->state = STDOUT_STREAM_FORWARD_TO_SYSLOG; - return 0; - - case STDOUT_STREAM_FORWARD_TO_SYSLOG: - r = parse_boolean(p); - if (r < 0) { - log_warning("Failed to parse forward to syslog line."); - return -EINVAL; - } - - s->forward_to_syslog = !!r; - s->state = STDOUT_STREAM_FORWARD_TO_KMSG; - return 0; - - case STDOUT_STREAM_FORWARD_TO_KMSG: - r = parse_boolean(p); - if (r < 0) { - log_warning("Failed to parse copy to kmsg line."); - return -EINVAL; - } - - s->forward_to_kmsg = !!r; - s->state = STDOUT_STREAM_FORWARD_TO_CONSOLE; - return 0; - - case STDOUT_STREAM_FORWARD_TO_CONSOLE: - r = parse_boolean(p); - if (r < 0) { - log_warning("Failed to parse copy to console line."); - return -EINVAL; - } - - s->forward_to_console = !!r; - s->state = STDOUT_STREAM_RUNNING; - return 0; - - case STDOUT_STREAM_RUNNING: - return stdout_stream_log(s, p); - } - - assert_not_reached("Unknown stream state"); -} - -static int stdout_stream_scan(StdoutStream *s, bool force_flush) { - char *p; - size_t remaining; - int r; - - assert(s); - - p = s->buffer; - remaining = s->length; - for (;;) { - char *end; - size_t skip; - - end = memchr(p, '\n', remaining); - if (end) - skip = end - p + 1; - else if (remaining >= sizeof(s->buffer) - 1) { - end = p + sizeof(s->buffer) - 1; - skip = remaining; - } else - break; - - *end = 0; - - r = stdout_stream_line(s, p); - if (r < 0) - return r; - - remaining -= skip; - p += skip; - } - - if (force_flush && remaining > 0) { - p[remaining] = 0; - r = stdout_stream_line(s, p); - if (r < 0) - return r; - - p += remaining; - remaining = 0; - } - - if (p > s->buffer) { - memmove(s->buffer, p, remaining); - s->length = remaining; - } - - return 0; -} - -static int stdout_stream_process(StdoutStream *s) { - ssize_t l; - int r; - - assert(s); - - l = read(s->fd, s->buffer+s->length, sizeof(s->buffer)-1-s->length); - if (l < 0) { - - if (errno == EAGAIN) - return 0; - - log_warning("Failed to read from stream: %m"); - return -errno; - } - - if (l == 0) { - r = stdout_stream_scan(s, true); - if (r < 0) - return r; - - return 0; - } - - s->length += l; - r = stdout_stream_scan(s, false); - if (r < 0) - return r; - - return 1; - -} - -static void stdout_stream_free(StdoutStream *s) { - assert(s); - - if (s->server) { - assert(s->server->n_stdout_streams > 0); - s->server->n_stdout_streams --; - LIST_REMOVE(StdoutStream, stdout_stream, s->server->stdout_streams, s); - } - - if (s->fd >= 0) { - if (s->server) - epoll_ctl(s->server->epoll_fd, EPOLL_CTL_DEL, s->fd, NULL); - - close_nointr_nofail(s->fd); - } - -#ifdef HAVE_SELINUX - if (s->security_context) - freecon(s->security_context); -#endif - - free(s->identifier); - free(s); -} - -static int stdout_stream_new(Server *s) { - StdoutStream *stream; - int fd, r; - socklen_t len; - struct epoll_event ev; - - assert(s); - - fd = accept4(s->stdout_fd, NULL, NULL, SOCK_NONBLOCK|SOCK_CLOEXEC); - if (fd < 0) { - if (errno == EAGAIN) - return 0; - - log_error("Failed to accept stdout connection: %m"); - return -errno; - } - - if (s->n_stdout_streams >= STDOUT_STREAMS_MAX) { - log_warning("Too many stdout streams, refusing connection."); - close_nointr_nofail(fd); - return 0; - } - - stream = new0(StdoutStream, 1); - if (!stream) { - close_nointr_nofail(fd); - return log_oom(); - } - - stream->fd = fd; - - len = sizeof(stream->ucred); - if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &stream->ucred, &len) < 0) { - log_error("Failed to determine peer credentials: %m"); - r = -errno; - goto fail; - } - -#ifdef HAVE_SELINUX - if (getpeercon(fd, &stream->security_context) < 0 && errno != ENOPROTOOPT) - log_error("Failed to determine peer security context: %m"); -#endif - - if (shutdown(fd, SHUT_WR) < 0) { - log_error("Failed to shutdown writing side of socket: %m"); - r = -errno; - goto fail; - } - - zero(ev); - ev.data.ptr = stream; - ev.events = EPOLLIN; - if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0) { - log_error("Failed to add stream to event loop: %m"); - r = -errno; - goto fail; - } - - stream->server = s; - LIST_PREPEND(StdoutStream, stdout_stream, s->stdout_streams, stream); - s->n_stdout_streams ++; - - return 0; - -fail: - stdout_stream_free(stream); - return r; -} - -static bool is_us(const char *pid) { - pid_t t; - - assert(pid); - - if (parse_pid(pid, &t) < 0) - return false; - - return t == getpid(); -} - -static void dev_kmsg_record(Server *s, char *p, size_t l) { - struct iovec iovec[N_IOVEC_META_FIELDS + 7 + N_IOVEC_KERNEL_FIELDS]; - char *message = NULL, *syslog_priority = NULL, *syslog_pid = NULL, *syslog_facility = NULL, *syslog_identifier = NULL, *source_time = NULL; - int priority, r; - unsigned n = 0, z = 0, j; - usec_t usec; - char *identifier = NULL, *pid = NULL, *e, *f, *k; - uint64_t serial; - - assert(s); - assert(p); - - if (l <= 0) - return; - - e = memchr(p, ',', l); - if (!e) - return; - *e = 0; - - r = safe_atoi(p, &priority); - if (r < 0 || priority < 0 || priority > 999) - return; - - if (s->forward_to_kmsg && (priority & LOG_FACMASK) != LOG_KERN) - return; - - l -= (e - p) + 1; - p = e + 1; - e = memchr(p, ',', l); - if (!e) - return; - *e = 0; - - r = safe_atou64(p, &serial); - if (r < 0) - return; - - l -= (e - p) + 1; - p = e + 1; - f = memchr(p, ';', l); - if (!f) - return; - /* Kernel 3.6 has the flags field, kernel 3.5 lacks that */ - e = memchr(p, ',', l); - if (!e || f < e) - e = f; - *e = 0; - - r = parse_usec(p, &usec); - if (r < 0) - return; - - l -= (f - p) + 1; - p = f + 1; - e = memchr(p, '\n', l); - if (!e) - return; - *e = 0; - - l -= (e - p) + 1; - k = e + 1; - - for (j = 0; l > 0 && j < N_IOVEC_KERNEL_FIELDS; j++) { - char *m; - /* Meta data fields attached */ - - if (*k != ' ') - break; - - k ++, l --; - - e = memchr(k, '\n', l); - if (!e) - return; - - *e = 0; - - m = new(char, sizeof("_KERNEL_") - 1 + e - k); - if (!m) - break; - - memcpy(m, "_KERNEL_", sizeof("_KERNEL_") - 1); - memcpy(m + sizeof("_KERNEL_") - 1, k, e - k); - - iovec[n].iov_base = m; - iovec[n].iov_len = sizeof("_KERNEL_") - 1 + e - k; - n++, z++; - - l -= (e - k) + 1; - k = e + 1; - } - - if (asprintf(&source_time, "_SOURCE_MONOTONIC_TIMESTAMP=%llu", - (unsigned long long) usec) >= 0) - IOVEC_SET_STRING(iovec[n++], source_time); - - IOVEC_SET_STRING(iovec[n++], "_TRANSPORT=kernel"); - - if (asprintf(&syslog_priority, "PRIORITY=%i", priority & LOG_PRIMASK) >= 0) - IOVEC_SET_STRING(iovec[n++], syslog_priority); - - if ((priority & LOG_FACMASK) == LOG_KERN) - IOVEC_SET_STRING(iovec[n++], "SYSLOG_IDENTIFIER=kernel"); - else { - read_identifier((const char**) &p, &identifier, &pid); - - /* Avoid any messages we generated ourselves via - * log_info() and friends. */ - if (pid && is_us(pid)) - goto finish; - - if (identifier) { - syslog_identifier = strappend("SYSLOG_IDENTIFIER=", identifier); - if (syslog_identifier) - IOVEC_SET_STRING(iovec[n++], syslog_identifier); - } - - if (pid) { - syslog_pid = strappend("SYSLOG_PID=", pid); - if (syslog_pid) - IOVEC_SET_STRING(iovec[n++], syslog_pid); - } - - if (asprintf(&syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority)) >= 0) - IOVEC_SET_STRING(iovec[n++], syslog_facility); - } - - message = strappend("MESSAGE=", p); - if (message) - IOVEC_SET_STRING(iovec[n++], message); - - dispatch_message(s, iovec, n, ELEMENTSOF(iovec), NULL, NULL, NULL, 0, NULL, priority); - -finish: - for (j = 0; j < z; j++) - free(iovec[j].iov_base); - - free(message); - free(syslog_priority); - free(syslog_identifier); - free(syslog_pid); - free(syslog_facility); - free(source_time); - free(identifier); - free(pid); -} - -static int system_journal_open(Server *s) { - int r; - char *fn; - sd_id128_t machine; - char ids[33]; - - r = sd_id128_get_machine(&machine); - if (r < 0) - 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->system_metrics, NULL, &s->system_journal); - free(fn); - - if (r >= 0) { - s->system_journal->compress = s->compress; - - server_fix_perms(s, s->system_journal, 0); - } else if (r < 0) { - - if (r != -ENOENT && r != -EROFS) - log_warning("Failed to open system journal: %s", strerror(-r)); - - r = 0; - } - } - - if (!s->runtime_journal && - (s->storage != STORAGE_NONE)) { - - fn = strjoin("/run/log/journal/", ids, "/system.journal", NULL); - if (!fn) - return -ENOMEM; - - if (s->system_journal) { - - /* Try to open the runtime journal, but only - * if it already exists, so that we can flush - * it into the system journal */ - - r = journal_file_open(fn, O_RDWR, 0640, &s->runtime_metrics, 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->runtime_metrics, 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) { - s->runtime_journal->compress = s->compress; - - server_fix_perms(s, s->runtime_journal, 0); - } - } - - return r; -} - -static int server_flush_to_var(Server *s) { - Object *o = NULL; - int r; - sd_id128_t machine; - sd_journal *j; +static int server_flush_to_var(Server *s) { + Object *o = NULL; + int r; + sd_id128_t machine; + sd_journal *j; assert(s); @@ -2130,61 +1230,6 @@ finish: return r; } -static int server_read_dev_kmsg(Server *s) { - char buffer[8192+1]; /* the kernel-side limit per record is 8K currently */ - ssize_t l; - - assert(s); - assert(s->dev_kmsg_fd >= 0); - - l = read(s->dev_kmsg_fd, buffer, sizeof(buffer) - 1); - if (l == 0) - return 0; - if (l < 0) { - /* Old kernels who don't allow reading from /dev/kmsg - * return EINVAL when we try. So handle this cleanly, - * but don' try to ever read from it again. */ - if (errno == EINVAL) { - epoll_ctl(s->epoll_fd, EPOLL_CTL_DEL, s->dev_kmsg_fd, NULL); - return 0; - } - - if (errno == EAGAIN || errno == EINTR) - return 0; - - log_error("Failed to read from kernel: %m"); - return -errno; - } - - dev_kmsg_record(s, buffer, l); - return 1; -} - -static int server_flush_dev_kmsg(Server *s) { - int r; - - assert(s); - - if (s->dev_kmsg_fd < 0) - return 0; - - if (!s->dev_kmsg_readable) - return 0; - - log_info("Flushing /dev/kmsg..."); - - for (;;) { - r = server_read_dev_kmsg(s); - if (r < 0) - return r; - - if (r == 0) - break; - } - - return 0; -} - static int process_event(Server *s, struct epoll_event *ev) { assert(s); assert(ev); @@ -2351,7 +1396,7 @@ static int process_event(Server *s, struct epoll_event *ev) { else s->buffer[n] = 0; - process_syslog_message(s, strstrip(s->buffer), ucred, tv, label, label_len); + 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."); @@ -2406,68 +1451,6 @@ static int process_event(Server *s, struct epoll_event *ev) { return 0; } -static int open_syslog_socket(Server *s) { - union sockaddr_union sa; - int one, r; - struct epoll_event ev; - - assert(s); - - if (s->syslog_fd < 0) { - - s->syslog_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0); - if (s->syslog_fd < 0) { - log_error("socket() failed: %m"); - return -errno; - } - - zero(sa); - sa.un.sun_family = AF_UNIX; - strncpy(sa.un.sun_path, "/dev/log", sizeof(sa.un.sun_path)); - - unlink(sa.un.sun_path); - - r = bind(s->syslog_fd, &sa.sa, offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path)); - if (r < 0) { - log_error("bind() failed: %m"); - return -errno; - } - - chmod(sa.un.sun_path, 0666); - } else - fd_nonblock(s->syslog_fd, 1); - - one = 1; - r = setsockopt(s->syslog_fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)); - if (r < 0) { - log_error("SO_PASSCRED failed: %m"); - return -errno; - } - -#ifdef HAVE_SELINUX - one = 1; - r = setsockopt(s->syslog_fd, SOL_SOCKET, SO_PASSSEC, &one, sizeof(one)); - if (r < 0) - log_warning("SO_PASSSEC failed: %m"); -#endif - - one = 1; - r = setsockopt(s->syslog_fd, SOL_SOCKET, SO_TIMESTAMP, &one, sizeof(one)); - if (r < 0) { - log_error("SO_TIMESTAMP failed: %m"); - return -errno; - } - - zero(ev); - ev.events = EPOLLIN; - ev.data.fd = s->syslog_fd; - if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->syslog_fd, &ev) < 0) { - log_error("Failed to add syslog server fd to epoll object: %m"); - return -errno; - } - - return 0; -} static int open_native_socket(Server*s) { union sockaddr_union sa; @@ -2532,82 +1515,6 @@ static int open_native_socket(Server*s) { return 0; } -static int open_stdout_socket(Server *s) { - union sockaddr_union sa; - int r; - struct epoll_event ev; - - assert(s); - - if (s->stdout_fd < 0) { - - s->stdout_fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0); - if (s->stdout_fd < 0) { - log_error("socket() failed: %m"); - return -errno; - } - - zero(sa); - sa.un.sun_family = AF_UNIX; - strncpy(sa.un.sun_path, "/run/systemd/journal/stdout", sizeof(sa.un.sun_path)); - - unlink(sa.un.sun_path); - - r = bind(s->stdout_fd, &sa.sa, offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path)); - if (r < 0) { - log_error("bind() failed: %m"); - return -errno; - } - - chmod(sa.un.sun_path, 0666); - - if (listen(s->stdout_fd, SOMAXCONN) < 0) { - log_error("liste() failed: %m"); - return -errno; - } - } else - fd_nonblock(s->stdout_fd, 1); - - zero(ev); - ev.events = EPOLLIN; - ev.data.fd = s->stdout_fd; - if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->stdout_fd, &ev) < 0) { - log_error("Failed to add stdout server fd to epoll object: %m"); - return -errno; - } - - return 0; -} - -static int open_dev_kmsg(Server *s) { - struct epoll_event ev; - - assert(s); - - s->dev_kmsg_fd = open("/dev/kmsg", O_RDWR|O_CLOEXEC|O_NONBLOCK|O_NOCTTY); - if (s->dev_kmsg_fd < 0) { - log_warning("Failed to open /dev/kmsg, ignoring: %m"); - return 0; - } - - zero(ev); - ev.events = EPOLLIN; - ev.data.fd = s->dev_kmsg_fd; - if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->dev_kmsg_fd, &ev) < 0) { - - /* This will fail with EPERM on older kernels where - * /dev/kmsg is not readable. */ - if (errno == EPERM) - return 0; - - log_error("Failed to add /dev/kmsg fd to epoll object: %m"); - return -errno; - } - - s->dev_kmsg_readable = true; - - return 0; -} static int open_signalfd(Server *s) { sigset_t mask; @@ -2725,6 +1632,7 @@ static int server_init(Server *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; @@ -2742,10 +1650,16 @@ static int server_init(Server *s) { 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"); @@ -2793,7 +1707,7 @@ static int server_init(Server *s) { } } - r = open_syslog_socket(s); + r = server_open_syslog_socket(s); if (r < 0) return r; @@ -2801,11 +1715,15 @@ static int server_init(Server *s) { if (r < 0) return r; - r = open_stdout_socket(s); + r = server_open_stdout_socket(s); if (r < 0) return r; - r = open_dev_kmsg(s); + r = server_open_dev_kmsg(s); + if (r < 0) + return r; + + r = server_open_kernel_seqnum(s); if (r < 0) return r; @@ -2813,6 +1731,10 @@ static int server_init(Server *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; @@ -2824,6 +1746,22 @@ static int server_init(Server *s) { return 0; } +static void 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); @@ -2863,8 +1801,17 @@ static void server_done(Server *s) { 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[]) { @@ -2883,6 +1830,7 @@ int main(int argc, char *argv[]) { log_set_target(LOG_TARGET_SAFE); log_set_facility(LOG_SYSLOG); + log_set_max_level(LOG_DEBUG); log_parse_environment(); log_open(); @@ -2897,7 +1845,7 @@ int main(int argc, char *argv[]) { server_flush_dev_kmsg(&server); log_debug("systemd-journald running as pid %lu", (unsigned long) getpid()); - driver_message(&server, SD_MESSAGE_JOURNAL_START, "Journal started"); + server_driver_message(&server, SD_MESSAGE_JOURNAL_START, "Journal started"); sd_notify(false, "READY=1\n" @@ -2905,8 +1853,26 @@ int main(int argc, char *argv[]) { for (;;) { struct epoll_event event; + int t; + +#ifdef HAVE_GCRYPT + usec_t u; + + if (server.system_journal && + journal_file_next_evolve_usec(server.system_journal, &u)) { + usec_t n; - r = epoll_wait(server.epoll_fd, &event, 1, -1); + n = now(CLOCK_REALTIME); + + if (n >= u) + t = 0; + else + t = (int) ((u - n + USEC_PER_MSEC - 1) / USEC_PER_MSEC); + } else +#endif + t = -1; + + r = epoll_wait(server.epoll_fd, &event, 1, t); if (r < 0) { if (errno == EINTR) @@ -2915,18 +1881,21 @@ int main(int argc, char *argv[]) { log_error("epoll_wait() failed: %m"); r = -errno; goto finish; - } else if (r == 0) - break; + } - r = process_event(&server, &event); - if (r < 0) - goto finish; - else if (r == 0) - break; + if (r > 0) { + r = process_event(&server, &event); + if (r < 0) + goto finish; + else if (r == 0) + break; + } + + maybe_append_tags(&server); } log_debug("systemd-journald stopped as pid %lu", (unsigned long) getpid()); - driver_message(&server, SD_MESSAGE_JOURNAL_STOP, "Journal stopped"); + server_driver_message(&server, SD_MESSAGE_JOURNAL_STOP, "Journal stopped"); finish: sd_notify(false,