journald: fix space limits reporting
Reporting of the free space was bogus, since the remaining space was compared with the maximum allowed, instead of the current use being compared with the maximum allowed. Simplify and fix by reporting limits directly at the point where they are calculated. Also, assign a UUID to the message.
This commit is contained in:
Zbigniew Jędrzejewski-Szmek
parent
30cb029b8b
commit
670b110c3b
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@ -237,7 +237,17 @@
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while the former apply if persistent
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logging is enabled and the system is
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fully booted
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up. <varname>SystemMaxUse=</varname>
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up. <command>journalctl</command> and
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<command>systemd-journald</command>
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ignore all files with names not ending
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with <literal>.journal</literal> or
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<literal>.journal~</literal>, so only
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such files, located in the appropriate
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directories, are taken into account
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when calculating current disk usage.
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</para>
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<para><varname>SystemMaxUse=</varname>
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and <varname>RuntimeMaxUse=</varname>
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control how much disk space the
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journal may use up at
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@ -271,11 +281,11 @@
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values in bytes or use K, M, G, T, P,
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E as units for the specified sizes
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(equal to 1024, 1024²,... bytes).
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Note that size limits are
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enforced synchronously to journal
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files as they are extended, and need
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no explicit rotation step triggered by
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time.</para></listitem>
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Note that size limits are enforced
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synchronously when journal files
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are extended, and no explicit
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rotation step triggered by
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time is needed.</para></listitem>
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</varlistentry>
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<varlistentry>
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@ -89,21 +89,22 @@ static const char* const split_mode_table[] = {
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DEFINE_STRING_TABLE_LOOKUP(split_mode, SplitMode);
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DEFINE_CONFIG_PARSE_ENUM(config_parse_split_mode, split_mode, SplitMode, "Failed to parse split mode setting");
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static uint64_t available_space(Server *s) {
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static uint64_t available_space(Server *s, bool verbose) {
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char ids[33];
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_cleanup_free_ char *p = NULL;
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const char *f;
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sd_id128_t machine;
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struct statvfs ss;
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uint64_t sum = 0, avail = 0, ss_avail = 0;
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uint64_t sum = 0, ss_avail = 0, avail = 0;
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int r;
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_cleanup_closedir_ DIR *d = NULL;
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usec_t ts;
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const char *f;
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JournalMetrics *m;
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ts = now(CLOCK_MONOTONIC);
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if (s->cached_available_space_timestamp + RECHECK_AVAILABLE_SPACE_USEC > ts)
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if (s->cached_available_space_timestamp + RECHECK_AVAILABLE_SPACE_USEC > ts
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&& !verbose)
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return s->cached_available_space;
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r = sd_id128_get_machine(&machine);
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@ -156,19 +157,27 @@ static uint64_t available_space(Server *s) {
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sum += (uint64_t) st.st_blocks * 512UL;
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}
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avail = sum >= m->max_use ? 0 : m->max_use - sum;
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ss_avail = ss.f_bsize * ss.f_bavail;
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avail = ss_avail > m->keep_free ? ss_avail - m->keep_free : 0;
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ss_avail = ss_avail < m->keep_free ? 0 : ss_avail - m->keep_free;
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if (ss_avail < avail)
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avail = ss_avail;
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s->cached_available_space = avail;
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s->cached_available_space = MIN(m->max_use, avail) > sum ? MIN(m->max_use, avail) - sum : 0;
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s->cached_available_space_timestamp = ts;
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return avail;
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if (verbose) {
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char fb1[FORMAT_BYTES_MAX], fb2[FORMAT_BYTES_MAX], fb3[FORMAT_BYTES_MAX],
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fb4[FORMAT_BYTES_MAX], fb5[FORMAT_BYTES_MAX];
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server_driver_message(s, SD_MESSAGE_JOURNAL_USAGE,
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"%s journal is using %s (max %s, leaving %s of free %s, current limit %s).",
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s->system_journal ? "Permanent" : "Runtime",
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format_bytes(fb1, sizeof(fb1), sum),
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format_bytes(fb2, sizeof(fb2), m->max_use),
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format_bytes(fb3, sizeof(fb3), m->keep_free),
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format_bytes(fb4, sizeof(fb4), ss_avail),
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format_bytes(fb5, sizeof(fb5), MIN(m->max_use, avail)));
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}
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return s->cached_available_space;
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}
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static void server_read_file_gid(Server *s) {
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@ -853,7 +862,7 @@ void server_dispatch_message(
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}
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rl = journal_rate_limit_test(s->rate_limit, path,
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priority & LOG_PRIMASK, available_space(s));
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priority & LOG_PRIMASK, available_space(s, false));
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if (rl == 0)
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return;
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@ -899,28 +908,13 @@ static int system_journal_open(Server *s) {
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fn = strappenda(fn, "/system.journal");
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r = journal_file_open_reliably(fn, O_RDWR|O_CREAT, 0640, s->compress, s->seal, &s->system_metrics, s->mmap, NULL, &s->system_journal);
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if (r >= 0) {
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char fb[FORMAT_BYTES_MAX];
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uint64_t avail;
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if (r >= 0)
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server_fix_perms(s, s->system_journal, 0);
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} else if (r < 0) {
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if (r != -ENOENT && r != -EROFS)
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log_warning("Failed to open system journal: %s", strerror(-r));
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server_driver_message(s, SD_ID128_NULL, "Allowing system journal files to grow to %s.",
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format_bytes(fb, sizeof(fb), s->system_metrics.max_use));
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avail = available_space(s);
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if (s->system_metrics.max_use > avail)
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server_driver_message(s, SD_ID128_NULL, "Journal size currently limited to %s due to SystemKeepFree.",
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format_bytes(fb, sizeof(fb), avail));
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} else if (r < 0) {
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if (r != -ENOENT && r != -EROFS)
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log_warning("Failed to open system journal: %s", strerror(-r));
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r = 0;
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}
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r = 0;
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}
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if (!s->runtime_journal &&
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@ -961,22 +955,12 @@ static int system_journal_open(Server *s) {
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}
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}
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if (s->runtime_journal) {
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char fb[FORMAT_BYTES_MAX];
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uint64_t avail;
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if (s->runtime_journal)
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server_fix_perms(s, s->runtime_journal, 0);
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server_driver_message(s, SD_ID128_NULL, "Allowing runtime journal files to grow to %s.",
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format_bytes(fb, sizeof(fb), s->runtime_metrics.max_use));
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avail = available_space(s);
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if (s->system_metrics.max_use > avail)
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server_driver_message(s, SD_ID128_NULL, "Journal size currently limited to %s due to RuntimeKeepFree.",
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format_bytes(fb, sizeof(fb), avail));
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}
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}
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available_space(s, true);
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return r;
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}
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@ -1228,8 +1212,8 @@ int process_event(Server *s, struct epoll_event *ev) {
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label = (char*) CMSG_DATA(cmsg);
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label_len = cmsg->cmsg_len - CMSG_LEN(0);
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} else if (cmsg->cmsg_level == SOL_SOCKET &&
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cmsg->cmsg_type == SO_TIMESTAMP &&
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cmsg->cmsg_len == CMSG_LEN(sizeof(struct timeval)))
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cmsg->cmsg_type == SO_TIMESTAMP &&
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cmsg->cmsg_len == CMSG_LEN(sizeof(struct timeval)))
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tv = (struct timeval*) CMSG_DATA(cmsg);
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else if (cmsg->cmsg_level == SOL_SOCKET &&
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cmsg->cmsg_type == SCM_RIGHTS) {
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@ -1455,7 +1439,7 @@ int server_init(Server *s) {
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zero(*s);
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s->sync_timer_fd = s->syslog_fd = s->native_fd = s->stdout_fd =
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s->signal_fd = s->epoll_fd = s->dev_kmsg_fd = -1;
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s->signal_fd = s->epoll_fd = s->dev_kmsg_fd = -1;
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s->compress = true;
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s->seal = true;
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@ -39,6 +39,7 @@ extern "C" {
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#define SD_MESSAGE_JOURNAL_STOP SD_ID128_MAKE(d9,3f,b3,c9,c2,4d,45,1a,97,ce,a6,15,ce,59,c0,0b)
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#define SD_MESSAGE_JOURNAL_DROPPED SD_ID128_MAKE(a5,96,d6,fe,7b,fa,49,94,82,8e,72,30,9e,95,d6,1e)
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#define SD_MESSAGE_JOURNAL_MISSED SD_ID128_MAKE(e9,bf,28,e6,e8,34,48,1b,b6,f4,8f,54,8a,d1,36,06)
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#define SD_MESSAGE_JOURNAL_USAGE SD_ID128_MAKE(ec,38,7f,57,7b,84,4b,8f,a9,48,f3,3c,ad,9a,75,e6)
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#define SD_MESSAGE_COREDUMP SD_ID128_MAKE(fc,2e,22,bc,6e,e6,47,b6,b9,07,29,ab,34,a2,50,b1)
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