journald: parse configuration file

5 files changed, 161 insertions, 39 deletions

diff --git a/src/journal/.gitignore b/src/journal/.gitignore
index faf48e7dc3..d6a79460cd 100644
--- a/src/journal/.gitignore
+++ b/src/journal/.gitignore
@@ -1 +1,2 @@
-libsystemd-journal.pc
+/journald-gperf.c
+/libsystemd-journal.pc
diff --git a/src/journal/journald-gperf.gperf b/src/journal/journald-gperf.gperf
new file mode 100644
index 0000000000..ace373ba47
--- /dev/null
+++ b/src/journal/journald-gperf.gperf
@@ -0,0 +1,27 @@
+%{
+#include <stddef.h>
+#include "conf-parser.h"
+#include "journald.h"
+%}
+struct ConfigPerfItem;
+%null_strings
+%language=ANSI-C
+%define slot-name section_and_lvalue
+%define hash-function-name journald_gperf_hash
+%define lookup-function-name journald_gperf_lookup
+%readonly-tables
+%omit-struct-type
+%struct-type
+%includes
+%%
+Journal.RateLimitInterval,  config_parse_usec,     0, offsetof(Server, rate_limit_interval)
+Journal.RateLimitBurst,     config_parse_unsigned, 0, offsetof(Server, rate_limit_burst)
+Journal.Compress,           config_parse_bool,     0, offsetof(Server, compress)
+Journal.SystemMaxUse,       config_parse_bytes,    0, offsetof(Server, system_metrics.max_use)
+Journal.SystemMaxFileSize,  config_parse_bytes,    0, offsetof(Server, system_metrics.max_size)
+Journal.SystemMinFileSize,  config_parse_bytes,    0, offsetof(Server, system_metrics.min_size)
+Journal.SystemKeepFree,     config_parse_bytes,    0, offsetof(Server, system_metrics.keep_free)
+Journal.RuntimeMaxUse,      config_parse_bytes,    0, offsetof(Server, runtime_metrics.max_use)
+Journal.RuntimeMaxFileSize, config_parse_bytes,    0, offsetof(Server, runtime_metrics.max_size)
+Journal.RuntimeMinFileSize, config_parse_bytes,    0, offsetof(Server, runtime_metrics.min_size)
+Journal.RuntimeKeepFree,    config_parse_bytes,    0, offsetof(Server, runtime_metrics.keep_free)
diff --git a/src/journal/journald.c b/src/journal/journald.c
index b029ab9781..68c1c23cdf 100644
--- a/src/journal/journald.c
+++ b/src/journal/journald.c
@@ -43,6 +43,8 @@
 #include "sd-journal.h"
 #include "sd-login.h"
 #include "journal-internal.h"
+#include "conf-parser.h"
+#include "journald.h"
 
 #define USER_JOURNALS_MAX 1024
 #define STDOUT_STREAMS_MAX 4096
@@ -56,40 +58,6 @@
 
 #define SYSLOG_TIMEOUT_USEC (5*USEC_PER_SEC)
 
-typedef struct StdoutStream StdoutStream;
-
-typedef struct Server {
-        int epoll_fd;
-        int signal_fd;
-        int syslog_fd;
-        int native_fd;
-        int stdout_fd;
-
-        JournalFile *runtime_journal;
-        JournalFile *system_journal;
-        Hashmap *user_journals;
-
-        uint64_t seqnum;
-
-        char *buffer;
-        size_t buffer_size;
-
-        JournalRateLimit *rate_limit;
-
-        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;
-
 typedef enum StdoutStreamState {
         STDOUT_STREAM_TAG,
         STDOUT_STREAM_PRIORITY,
@@ -1761,6 +1729,32 @@ static int open_signalfd(Server *s) {
         return 0;
 }
 
+static int server_parse_config_file(Server *s) {
+        FILE *f;
+        const char *fn;
+        int r;
+
+        assert(s);
+
+        fn = "/etc/systemd/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;
 
@@ -1770,9 +1764,14 @@ static int server_init(Server *s) {
         s->syslog_fd = s->native_fd = s->stdout_fd = s->signal_fd = s->epoll_fd = -1;
         s->compress = true;
 
+        s->rate_limit_interval = DEFAULT_RATE_LIMIT_INTERVAL;
+        s->rate_limit_burst = DEFAULT_RATE_LIMIT_BURST;
+
         memset(&s->system_metrics, 0xFF, sizeof(s->system_metrics));
         memset(&s->runtime_metrics, 0xFF, sizeof(s->runtime_metrics));
 
+        server_parse_config_file(s);
+
         s->user_journals = hashmap_new(trivial_hash_func, trivial_compare_func);
         if (!s->user_journals) {
                 log_error("Out of memory.");
@@ -1846,7 +1845,7 @@ static int server_init(Server *s) {
         if (r < 0)
                 return r;
 
-        s->rate_limit = journal_rate_limit_new(DEFAULT_RATE_LIMIT_INTERVAL, DEFAULT_RATE_LIMIT_BURST);
+        s->rate_limit = journal_rate_limit_new(s->rate_limit_interval, s->rate_limit_burst);
         if (!s->rate_limit)
                 return -ENOMEM;
 
@@ -1916,15 +1915,15 @@ int main(int argc, char *argv[]) {
         if (r < 0)
                 goto finish;
 
+        server_vacuum(&server);
+        server_flush_to_var(&server);
+
         log_debug("systemd-journald running as pid %lu", (unsigned long) getpid());
 
         sd_notify(false,
                   "READY=1\n"
                   "STATUS=Processing requests...");
 
-        server_vacuum(&server);
-        server_flush_to_var(&server);
-
         for (;;) {
                 struct epoll_event event;
 
diff --git a/src/journal/journald.h b/src/journal/journald.h
new file mode 100644
index 0000000000..47feca40aa
--- /dev/null
+++ b/src/journal/journald.h
@@ -0,0 +1,74 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#ifndef foojournaldhfoo
+#define foojournaldhfoo
+
+/***
+  This file is part of systemd.
+
+  Copyright 2011 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <inttypes.h>
+#include <sys/types.h>
+#include <stdbool.h>
+
+#include "journal-file.h"
+#include "hashmap.h"
+#include "util.h"
+#include "journal-rate-limit.h"
+#include "list.h"
+
+typedef struct StdoutStream StdoutStream;
+
+typedef struct Server {
+        int epoll_fd;
+        int signal_fd;
+        int syslog_fd;
+        int native_fd;
+        int stdout_fd;
+
+        JournalFile *runtime_journal;
+        JournalFile *system_journal;
+        Hashmap *user_journals;
+
+        uint64_t seqnum;
+
+        char *buffer;
+        size_t buffer_size;
+
+        JournalRateLimit *rate_limit;
+        usec_t rate_limit_interval;
+        unsigned rate_limit_burst;
+
+        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;
+
+/* gperf lookup function */
+const struct ConfigPerfItem* journald_gperf_lookup(const char *key, unsigned length);
+
+#endif
diff --git a/src/journal/systemd-journald.conf b/src/journal/systemd-journald.conf
new file mode 100644
index 0000000000..f137ab8833
--- /dev/null
+++ b/src/journal/systemd-journald.conf
@@ -0,0 +1,21 @@
+#  This file is part of systemd.
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU General Public License as published by
+#  the Free Software Foundation; either version 2 of the License, or
+#  (at your option) any later version.
+#
+# See system-journald.conf(5) for details
+
+[Journal]
+#Compress=yes
+#RateLimitInterval=10s
+#RateLimitBurst=200
+#SystemMaxUse=
+#SystemKeepFree=
+#SystemMaxFileSize=
+#SystemMinFileSize=
+#RuntimeMaxUse=
+#RuntimeKeepFree=
+#RuntimeMaxFileSize=
+#RuntimeMinFileSize=