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From 4c82b9247b29f31814e7ee5f77c745db659e27ac Mon Sep 17 00:00:00 2001
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From: Lennart Poettering <lennart@poettering.net>
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Date: Sat, 24 Oct 2015 13:17:54 +0200
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Subject: [PATCH] journal: fix error handling when compressing journal objects
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Let's make sure we handle compression errors properly, and don't
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misunderstand an error for success.
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Also, let's actually compress things if lz4 is enabled.
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Fixes #1662.
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Cherry-picked from: d1afbcd22170e95c79261340071d376fe41fc3af
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Resolves: #1292447
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---
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src/journal/journal-file.c | 12 +++++++-----
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src/journal/journal-file.h | 5 +++++
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2 files changed, 12 insertions(+), 5 deletions(-)
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diff --git a/src/journal/journal-file.c b/src/journal/journal-file.c
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index f500568..a8f92e2 100644
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--- a/src/journal/journal-file.c
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+++ b/src/journal/journal-file.c
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@@ -1051,23 +1051,25 @@ static int journal_file_append_data(
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o->data.hash = htole64(hash);
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#if defined(HAVE_XZ) || defined(HAVE_LZ4)
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- if (f->compress_xz &&
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- size >= COMPRESSION_SIZE_THRESHOLD) {
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+ if (JOURNAL_FILE_COMPRESS(f) && size >= COMPRESSION_SIZE_THRESHOLD) {
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size_t rsize;
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compression = compress_blob(data, size, o->data.payload, &rsize);
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- if (compression) {
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+ if (compression >= 0) {
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o->object.size = htole64(offsetof(Object, data.payload) + rsize);
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o->object.flags |= compression;
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log_debug("Compressed data object %"PRIu64" -> %zu using %s",
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size, rsize, object_compressed_to_string(compression));
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- }
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+ } else
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+ /* Compression didn't work, we don't really care why, let's continue without compression */
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+ compression = 0;
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+
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}
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#endif
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- if (!compression && size > 0)
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+ if (compression == 0 && size > 0)
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memcpy(o->data.payload, data, size);
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r = journal_file_link_data(f, o, p, hash);
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diff --git a/src/journal/journal-file.h b/src/journal/journal-file.h
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index 403c8f7..0f29b09 100644
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--- a/src/journal/journal-file.h
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+++ b/src/journal/journal-file.h
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@@ -229,3 +229,8 @@ int journal_file_get_cutoff_realtime_usec(JournalFile *f, usec_t *from, usec_t *
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int journal_file_get_cutoff_monotonic_usec(JournalFile *f, sd_id128_t boot, usec_t *from, usec_t *to);
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bool journal_file_rotate_suggested(JournalFile *f, usec_t max_file_usec);
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+
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+static inline bool JOURNAL_FILE_COMPRESS(JournalFile *f) {
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+ assert(f);
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+ return f->compress_xz || f->compress_lz4;
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+}
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