journald: add Storage= setting to control where the journal is stored

3 files changed, 47 insertions, 7 deletions

diff --git a/src/journal/journald-gperf.gperf b/src/journal/journald-gperf.gperf
index c9b0fbb0e2..4fe2ea0ec6 100644
--- a/src/journal/journald-gperf.gperf
+++ b/src/journal/journald-gperf.gperf
@@ -34,3 +34,4 @@ Journal.MaxLevelStore,      config_parse_level,     0, offsetof(Server, max_leve
 Journal.MaxLevelSyslog,     config_parse_level,     0, offsetof(Server, max_level_syslog)
 Journal.MaxLevelKMsg,       config_parse_level,     0, offsetof(Server, max_level_kmsg)
 Journal.MaxLevelConsole,    config_parse_level,     0, offsetof(Server, max_level_console)
+Journal.Storage,            config_parse_storage,   0, offsetof(Server, storage)
diff --git a/src/journal/journald.c b/src/journal/journald.c
index 7ea68aab3c..08597ae3eb 100644
--- a/src/journal/journald.c
+++ b/src/journal/journald.c
@@ -111,6 +111,16 @@ struct StdoutStream {
         LIST_FIELDS(StdoutStream, stdout_stream);
 };
 
+static const char* const storage_table[] = {
+        [STORAGE_AUTO] = "auto",
+        [STORAGE_VOLATILE] = "volatile",
+        [STORAGE_PERMANENT] = "permanent",
+        [STORAGE_NONE] = "none"
+};
+
+DEFINE_STRING_TABLE_LOOKUP(storage, Storage);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_storage, storage, Storage, "Failed to parse storage setting");
+
 static int server_flush_to_var(Server *s);
 
 static uint64_t available_space(Server *s) {
@@ -397,7 +407,6 @@ static void server_vacuum(Server *s) {
                 free(p);
         }
 
-
         if (s->runtime_journal) {
                 if (asprintf(&p, "/run/log/journal/%s", ids) < 0) {
                         log_error("Out of memory.");
@@ -625,9 +634,7 @@ static void dispatch_message_real(
 
 retry:
         f = find_journal(s, realuid == 0 ? 0 : loginuid);
-        if (!f)
-                log_warning("Dropping message, as we can't find a place to store the data.");
-        else {
+        if (f) {
                 r = journal_file_append_entry(f, NULL, iovec, n, &s->seqnum, NULL, NULL);
 
                 if ((r == -E2BIG || /* hit limit */
@@ -1955,12 +1962,23 @@ static int system_journal_open(Server *s) {
 
         sd_id128_to_string(machine, ids);
 
-        if (!s->system_journal) {
+        if (!s->system_journal &&
+            (s->storage == STORAGE_PERMANENT ||
+             s->storage == STORAGE_AUTO)) {
+
+                /* If in auto mode: first try to create the machine
+                 * path, but not the prefix.
+                 *
+                 * If in permanent mode: create /var/log/journal and
+                 * the machine path */
+
+                if (s->storage & STORAGE_PERMANENT)
+                        (void) mkdir("/var/log/journal/", 0755);
 
-                /* 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);
 
@@ -1988,7 +2006,8 @@ static int system_journal_open(Server *s) {
                 }
         }
 
-        if (!s->runtime_journal) {
+        if (!s->runtime_journal &&
+            (s->storage != STORAGE_NONE)) {
 
                 fn = join("/run/log/journal/", ids, "/system.journal", NULL);
                 if (!fn)
@@ -2048,6 +2067,10 @@ static int server_flush_to_var(Server *s) {
 
         assert(s);
 
+        if (s->storage != STORAGE_AUTO &&
+            s->storage != STORAGE_PERMANENT)
+                return 0;
+
         if (!s->runtime_journal)
                 return 0;
 
diff --git a/src/journal/journald.h b/src/journal/journald.h
index 159364d930..34deb8561e 100644
--- a/src/journal/journald.h
+++ b/src/journal/journald.h
@@ -33,6 +33,15 @@
 #include "journal-rate-limit.h"
 #include "list.h"
 
+typedef enum Storage {
+        STORAGE_AUTO,
+        STORAGE_VOLATILE,
+        STORAGE_PERMANENT,
+        STORAGE_NONE,
+        _STORAGE_MAX,
+        _STORAGE_INVALID = -1
+} Storage;
+
 typedef struct StdoutStream StdoutStream;
 
 typedef struct Server {
@@ -86,9 +95,16 @@ typedef struct Server {
         int max_level_syslog;
         int max_level_kmsg;
         int max_level_console;
+
+        Storage storage;
 } Server;
 
 /* gperf lookup function */
 const struct ConfigPerfItem* journald_gperf_lookup(const char *key, unsigned length);
 
+int config_parse_storage(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+
+const char *storage_to_string(Storage s);
+Storage storage_from_string(const char *s);
+
 #endif