diff options
Diffstat (limited to 'src/journal/journal-file.c')
| -rw-r--r-- | src/journal/journal-file.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/src/journal/journal-file.c b/src/journal/journal-file.c index 7b9815c69f..35f3ea92a4 100644 --- a/src/journal/journal-file.c +++ b/src/journal/journal-file.c @@ -1949,6 +1949,58 @@ void journal_file_save_location(JournalFile *f, direction_t direction, Object *o f->current_xor_hash = le64toh(o->entry.xor_hash); } +int journal_file_compare_locations(JournalFile *af, JournalFile *bf) { + assert(af); + assert(bf); + assert(af->location_type == LOCATION_SEEK); + assert(bf->location_type == LOCATION_SEEK); + + /* If contents and timestamps match, these entries are + * identical, even if the seqnum does not match */ + if (sd_id128_equal(af->current_boot_id, bf->current_boot_id) && + af->current_monotonic == bf->current_monotonic && + af->current_realtime == bf->current_realtime && + af->current_xor_hash == bf->current_xor_hash) + return 0; + + if (sd_id128_equal(af->header->seqnum_id, bf->header->seqnum_id)) { + + /* If this is from the same seqnum source, compare + * seqnums */ + if (af->current_seqnum < bf->current_seqnum) + return -1; + if (af->current_seqnum > bf->current_seqnum) + return 1; + + /* Wow! This is weird, different data but the same + * seqnums? Something is borked, but let's make the + * best of it and compare by time. */ + } + + if (sd_id128_equal(af->current_boot_id, bf->current_boot_id)) { + + /* If the boot id matches, compare monotonic time */ + if (af->current_monotonic < bf->current_monotonic) + return -1; + if (af->current_monotonic > bf->current_monotonic) + return 1; + } + + /* Otherwise, compare UTC time */ + if (af->current_realtime < bf->current_realtime) + return -1; + if (af->current_realtime > bf->current_realtime) + return 1; + + /* Finally, compare by contents */ + if (af->current_xor_hash < bf->current_xor_hash) + return -1; + if (af->current_xor_hash > bf->current_xor_hash) + return 1; + + return 0; +} + int journal_file_next_entry( JournalFile *f, Object *o, uint64_t p, |