journald: minor fixes

This primarily contains some minor coding style fixups for 7a24f3bf2fb181243a1957a0cdd54cd919396793 and earlier changes. Specifically:

* Don't log at log levels above LOG_DEBUG from "library" code like journal-file.c

* Don't negate errno values before passing them to log_debug_errno(), as the call can handle this fine anyway

* Cast some calls we knowingly ignore the return values of to (void)

* Don't clobber function call-by-ref return values on failure

* Don't mix function calls and variable declarations in one line

There's also one more relevant change: when failing to enqueue a journal change fs event, we'll run it immediately.

2 files changed, 26 insertions, 17 deletions

diff --git a/src/journal/journal-file.c b/src/journal/journal-file.c
index 929ad0aa7c..2973176c8d 100644
--- a/src/journal/journal-file.c
+++ b/src/journal/journal-file.c
@@ -157,7 +157,7 @@ JournalFile* journal_file_close(JournalFile *f) {
                         if (enabled == SD_EVENT_ONESHOT)
                                 journal_file_post_change(f);
 
-                sd_event_source_set_enabled(f->post_change_timer, SD_EVENT_OFF);
+                (void) sd_event_source_set_enabled(f->post_change_timer, SD_EVENT_OFF);
                 sd_event_source_unref(f->post_change_timer);
         }
 
@@ -1409,7 +1409,7 @@ void journal_file_post_change(JournalFile *f) {
         __sync_synchronize();
 
         if (ftruncate(f->fd, f->last_stat.st_size) < 0)
-                log_error_errno(errno, "Failed to truncate file to its own size: %m");
+                log_debug_errno(errno, "Failed to truncate file to its own size: %m");
 }
 
 static int post_change_thunk(sd_event_source *timer, uint64_t usec, void *userdata) {
@@ -1432,8 +1432,8 @@ static void schedule_post_change(JournalFile *f) {
 
         r = sd_event_source_get_enabled(timer, &enabled);
         if (r < 0) {
-                log_error_errno(-r, "Failed to get ftruncate timer state: %m");
-                return;
+                log_debug_errno(r, "Failed to get ftruncate timer state: %m");
+                goto fail;
         }
 
         if (enabled == SD_EVENT_ONESHOT)
@@ -1441,21 +1441,27 @@ static void schedule_post_change(JournalFile *f) {
 
         r = sd_event_now(sd_event_source_get_event(timer), CLOCK_MONOTONIC, &now);
         if (r < 0) {
-                log_error_errno(-r, "Failed to get clock's now for scheduling ftruncate: %m");
-                return;
+                log_debug_errno(r, "Failed to get clock's now for scheduling ftruncate: %m");
+                goto fail;
         }
 
         r = sd_event_source_set_time(timer, now+f->post_change_timer_period);
         if (r < 0) {
-                log_error_errno(-r, "Failed to set time for scheduling ftruncate: %m");
-                return;
+                log_debug_errno(r, "Failed to set time for scheduling ftruncate: %m");
+                goto fail;
         }
 
         r = sd_event_source_set_enabled(timer, SD_EVENT_ONESHOT);
         if (r < 0) {
-                log_error_errno(-r, "Failed to enable scheduled ftruncate: %m");
-                return;
+                log_debug_errno(r, "Failed to enable scheduled ftruncate: %m");
+                goto fail;
         }
+
+        return;
+
+fail:
+        /* On failure, let's simply post the change immediately. */
+        journal_file_post_change(f);
 }
 
 /* Enable coalesced change posting in a timer on the provided sd_event instance */
@@ -2854,9 +2860,11 @@ int journal_file_open(
         }
 
         if (template && template->post_change_timer) {
-                sd_event *e = sd_event_source_get_event(template->post_change_timer);
+                r = journal_file_enable_post_change_timer(
+                                f,
+                                sd_event_source_get_event(template->post_change_timer),
+                                template->post_change_timer_period);
 
-                r = journal_file_enable_post_change_timer(f, e, template->post_change_timer_period);
                 if (r < 0)
                         goto fail;
         }
diff --git a/src/journal/journald-server.c b/src/journal/journald-server.c
index c3add87ed1..0a85c38e1c 100644
--- a/src/journal/journald-server.c
+++ b/src/journal/journald-server.c
@@ -233,25 +233,26 @@ static int open_journal(
                 JournalFile *template,
                 JournalFile **ret) {
         int r;
+        JournalFile *f;
 
         assert(s);
         assert(fname);
         assert(ret);
 
         if (reliably)
-                r = journal_file_open_reliably(fname, flags, 0640, s->compress, seal, metrics, s->mmap, template, ret);
+                r = journal_file_open_reliably(fname, flags, 0640, s->compress, seal, metrics, s->mmap, template, &f);
         else
-                r = journal_file_open(fname, flags, 0640, s->compress, seal, metrics, s->mmap, template, ret);
-
+                r = journal_file_open(fname, flags, 0640, s->compress, seal, metrics, s->mmap, template, &f);
         if (r < 0)
                 return r;
 
-        r = journal_file_enable_post_change_timer(*ret, s->event, POST_CHANGE_TIMER_INTERVAL_USEC);
+        r = journal_file_enable_post_change_timer(f, s->event, POST_CHANGE_TIMER_INTERVAL_USEC);
         if (r < 0) {
-                *ret = journal_file_close(*ret);
+                journal_file_close(f);
                 return r;
         }
 
+        *ret = f;
         return r;
 }