|
 |
dd65c9 |
From 80f0fa4a77bfceab3bae7cf67f44b8f899b22427 Mon Sep 17 00:00:00 2001
|
|
|
dd65c9 |
From: Vito Caputo <vcaputo@gnugeneration.com>
|
|
|
dd65c9 |
Date: Tue, 18 Jul 2017 18:00:37 +0200
|
|
|
dd65c9 |
Subject: [PATCH] journal: implicitly flush to var on recovery (#4028)
|
|
|
dd65c9 |
|
|
|
dd65c9 |
When the system journal becomes re-opened post-flush with the runtime
|
|
|
dd65c9 |
journal open, it implies we've recovered from something like an ENOSPC
|
|
|
dd65c9 |
situation where the system journal rotate had failed, leaving the system
|
|
|
dd65c9 |
journal closed, causing the runtime journal to be opened post-flush.
|
|
|
dd65c9 |
|
|
|
dd65c9 |
For the duration of the unavailable system journal, we log to the
|
|
|
dd65c9 |
runtime journal. But when the system journal gets opened (space made
|
|
|
dd65c9 |
available, for example), we need to close the runtime journal before new
|
|
|
dd65c9 |
journal writes will go to the system journal. Calling
|
|
|
dd65c9 |
server_flush_to_var() after opening the system journal with a runtime
|
|
|
dd65c9 |
journal present, post-flush, achieves this while preserving the runtime
|
|
|
dd65c9 |
journal's contents in the system journal.
|
|
|
dd65c9 |
|
|
|
dd65c9 |
The combination of the present flushed flag file and the runtime journal
|
|
|
dd65c9 |
being open is a state where we should be logging to the system journal,
|
|
|
dd65c9 |
so it's appropriate to resume doing so once we've successfully opened
|
|
|
dd65c9 |
the system journal.
|
|
|
dd65c9 |
|
|
|
dd65c9 |
(cherry picked from commit 929eeb5498e8ae87e05ae683c6d3014d4b59056d)
|
|
|
dd65c9 |
|
|
|
dd65c9 |
Related: #1364092
|
|
|
dd65c9 |
---
|
|
|
dd65c9 |
src/journal/journald-server.c | 15 +++++++++++++--
|
|
|
dd65c9 |
1 file changed, 13 insertions(+), 2 deletions(-)
|
|
|
dd65c9 |
|
|
|
dd65c9 |
diff --git a/src/journal/journald-server.c b/src/journal/journald-server.c
|
|
|
dd65c9 |
index 2b7ecd09a..3e9412d57 100644
|
|
|
dd65c9 |
--- a/src/journal/journald-server.c
|
|
|
dd65c9 |
+++ b/src/journal/journald-server.c
|
|
|
dd65c9 |
@@ -923,6 +923,7 @@ static int system_journal_open(Server *s, bool flush_requested) {
|
|
|
dd65c9 |
char *fn;
|
|
|
dd65c9 |
sd_id128_t machine;
|
|
|
dd65c9 |
char ids[33];
|
|
|
dd65c9 |
+ bool flushed = false;
|
|
|
dd65c9 |
|
|
|
dd65c9 |
r = sd_id128_get_machine(&machine);
|
|
|
dd65c9 |
if (r < 0)
|
|
|
dd65c9 |
@@ -933,7 +934,7 @@ static int system_journal_open(Server *s, bool flush_requested) {
|
|
|
dd65c9 |
if (!s->system_journal &&
|
|
|
dd65c9 |
(s->storage == STORAGE_PERSISTENT || s->storage == STORAGE_AUTO) &&
|
|
|
dd65c9 |
(flush_requested
|
|
|
dd65c9 |
- || access("/run/systemd/journal/flushed", F_OK) >= 0)) {
|
|
|
dd65c9 |
+ || (flushed = (access("/run/systemd/journal/flushed", F_OK) >= 0)))) {
|
|
|
dd65c9 |
|
|
|
dd65c9 |
/* If in auto mode: first try to create the machine
|
|
|
dd65c9 |
* path, but not the prefix.
|
|
|
dd65c9 |
@@ -958,6 +959,16 @@ static int system_journal_open(Server *s, bool flush_requested) {
|
|
|
dd65c9 |
|
|
|
dd65c9 |
r = 0;
|
|
|
dd65c9 |
}
|
|
|
dd65c9 |
+
|
|
|
dd65c9 |
+ /* If the runtime journal is open, and we're post-flush, we're
|
|
|
dd65c9 |
+ * recovering from a failed system journal rotate (ENOSPC)
|
|
|
dd65c9 |
+ * for which the runtime journal was reopened.
|
|
|
dd65c9 |
+ *
|
|
|
dd65c9 |
+ * Perform an implicit flush to var, leaving the runtime
|
|
|
dd65c9 |
+ * journal closed, now that the system journal is back.
|
|
|
dd65c9 |
+ */
|
|
|
dd65c9 |
+ if (s->runtime_journal && flushed)
|
|
|
dd65c9 |
+ (void) server_flush_to_var(s);
|
|
|
dd65c9 |
}
|
|
|
dd65c9 |
|
|
|
dd65c9 |
if (!s->runtime_journal &&
|
|
|
dd65c9 |
@@ -1230,7 +1241,7 @@ static int dispatch_sigusr1(sd_event_source *es, const struct signalfd_siginfo *
|
|
|
dd65c9 |
|
|
|
dd65c9 |
log_info("Received request to flush runtime journal from PID %"PRIu32, si->ssi_pid);
|
|
|
dd65c9 |
|
|
|
dd65c9 |
- server_flush_to_var(s);
|
|
|
dd65c9 |
+ (void) server_flush_to_var(s);
|
|
|
dd65c9 |
server_sync(s);
|
|
|
dd65c9 |
server_vacuum(s);
|
|
|
dd65c9 |
|