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-rw-r--r--src/journal/journal-file.c121
1 files changed, 97 insertions, 24 deletions
diff --git a/src/journal/journal-file.c b/src/journal/journal-file.c
index a110a0090f..9128f0d642 100644
--- a/src/journal/journal-file.c
+++ b/src/journal/journal-file.c
@@ -58,10 +58,16 @@
* size */
#define DEFAULT_KEEP_FREE (1024ULL*1024ULL) /* 1 MB */
-static const char signature[] = { 'L', 'P', 'K', 'S', 'H', 'H', 'R', 'H' };
+/* n_data was the first entry we added after the initial file format design */
+#define HEADER_SIZE_MIN ALIGN64(offsetof(Header, n_data))
#define ALIGN64(x) (((x) + 7ULL) & ~7ULL)
+#define JOURNAL_HEADER_CONTAINS(h, field) \
+ (le64toh((h)->header_size) >= offsetof(Header, field) + sizeof((h)->field))
+
+static const char signature[] = { 'L', 'P', 'K', 'S', 'H', 'H', 'R', 'H' };
+
void journal_file_close(JournalFile *f) {
int t;
@@ -107,7 +113,7 @@ static int journal_file_init_header(JournalFile *f, JournalFile *template) {
if (template) {
h.seqnum_id = template->header->seqnum_id;
- h.seqnum = template->header->seqnum;
+ h.tail_seqnum = template->header->tail_seqnum;
} else
h.seqnum_id = h.file_id;
@@ -161,7 +167,8 @@ static int journal_file_verify_header(JournalFile *f) {
return -EPROTONOSUPPORT;
#endif
- if (f->header->header_size != htole64(ALIGN64(sizeof(*(f->header)))))
+ /* The first addition was n_data, so check that we are at least this large */
+ if (le64toh(f->header->header_size) < HEADER_SIZE_MIN)
return -EBADMSG;
if ((uint64_t) f->last_stat.st_size < (le64toh(f->header->header_size) + le64toh(f->header->arena_size)))
@@ -427,7 +434,7 @@ static uint64_t journal_file_seqnum(JournalFile *f, uint64_t *seqnum) {
assert(f);
- r = le64toh(f->header->seqnum) + 1;
+ r = le64toh(f->header->tail_seqnum) + 1;
if (seqnum) {
/* If an external seqnum counter was passed, we update
@@ -440,10 +447,10 @@ static uint64_t journal_file_seqnum(JournalFile *f, uint64_t *seqnum) {
*seqnum = r;
}
- f->header->seqnum = htole64(r);
+ f->header->tail_seqnum = htole64(r);
- if (f->header->first_seqnum == 0)
- f->header->first_seqnum = htole64(r);
+ if (f->header->head_seqnum == 0)
+ f->header->head_seqnum = htole64(r);
return r;
}
@@ -614,6 +621,9 @@ static int journal_file_link_data(JournalFile *f, Object *o, uint64_t offset, ui
f->data_hash_table[h].tail_hash_offset = htole64(offset);
+ if (JOURNAL_HEADER_CONTAINS(f->header, n_data))
+ f->header->n_data = htole64(le64toh(f->header->n_data) + 1);
+
return 0;
}
@@ -1809,27 +1819,13 @@ int journal_file_move_to_entry_by_realtime_for_data(
}
void journal_file_dump(JournalFile *f) {
- char a[33], b[33], c[33];
Object *o;
int r;
uint64_t p;
assert(f);
- printf("File Path: %s\n"
- "File ID: %s\n"
- "Machine ID: %s\n"
- "Boot ID: %s\n"
- "Arena size: %llu\n"
- "Objects: %lu\n"
- "Entries: %lu\n",
- f->path,
- sd_id128_to_string(f->header->file_id, a),
- sd_id128_to_string(f->header->machine_id, b),
- sd_id128_to_string(f->header->boot_id, c),
- (unsigned long long) le64toh(f->header->arena_size),
- (unsigned long) le64toh(f->header->n_objects),
- (unsigned long) le64toh(f->header->n_entries));
+ journal_file_print_header(f);
p = le64toh(f->header->header_size);
while (p != 0) {
@@ -1885,6 +1881,58 @@ fail:
log_error("File corrupt");
}
+void journal_file_print_header(JournalFile *f) {
+ char a[33], b[33], c[33];
+ char x[FORMAT_TIMESTAMP_MAX], y[FORMAT_TIMESTAMP_MAX];
+
+ assert(f);
+
+ printf("File Path: %s\n"
+ "File ID: %s\n"
+ "Machine ID: %s\n"
+ "Boot ID: %s\n"
+ "Sequential Number ID: %s\n"
+ "Header size: %llu\n"
+ "Arena size: %llu\n"
+ "Data Hash Table Size: %llu\n"
+ "Field Hash Table Size: %llu\n"
+ "Objects: %llu\n"
+ "Entry Objects: %llu\n"
+ "Rotate Suggested: %s\n"
+ "Head Sequential Number: %llu\n"
+ "Tail Sequential Number: %llu\n"
+ "Head Realtime Timestamp: %s\n"
+ "Tail Realtime Timestamp: %s\n",
+ f->path,
+ sd_id128_to_string(f->header->file_id, a),
+ sd_id128_to_string(f->header->machine_id, b),
+ sd_id128_to_string(f->header->boot_id, c),
+ sd_id128_to_string(f->header->seqnum_id, c),
+ (unsigned long long) le64toh(f->header->header_size),
+ (unsigned long long) le64toh(f->header->arena_size),
+ (unsigned long long) le64toh(f->header->data_hash_table_size) / sizeof(HashItem),
+ (unsigned long long) le64toh(f->header->field_hash_table_size) / sizeof(HashItem),
+ (unsigned long long) le64toh(f->header->n_objects),
+ (unsigned long long) le64toh(f->header->n_entries),
+ yes_no(journal_file_rotate_suggested(f)),
+ (unsigned long long) le64toh(f->header->head_seqnum),
+ (unsigned long long) le64toh(f->header->tail_seqnum),
+ format_timestamp(x, sizeof(x), le64toh(f->header->head_entry_realtime)),
+ format_timestamp(y, sizeof(y), le64toh(f->header->tail_entry_realtime)));
+
+ if (JOURNAL_HEADER_CONTAINS(f->header, n_data))
+ printf("Data Objects: %llu\n"
+ "Data Hash Table Fill: %.1f%%\n",
+ (unsigned long long) le64toh(f->header->n_data),
+ 100.0 * (double) le64toh(f->header->n_data) / ((double) (le64toh(f->header->data_hash_table_size) / sizeof(HashItem))));
+
+ if (JOURNAL_HEADER_CONTAINS(f->header, n_fields))
+ printf("Field Objects: %llu\n"
+ "Field Hash Table Fill: %.1f%%\n",
+ (unsigned long long) le64toh(f->header->n_fields),
+ 100.0 * (double) le64toh(f->header->n_fields) / ((double) (le64toh(f->header->field_hash_table_size) / sizeof(HashItem))));
+}
+
int journal_file_open(
const char *fname,
int flags,
@@ -1950,7 +1998,7 @@ int journal_file_open(
}
}
- if (f->last_stat.st_size < (off_t) sizeof(Header)) {
+ if (f->last_stat.st_size < (off_t) HEADER_SIZE_MIN) {
r = -EIO;
goto fail;
}
@@ -2032,7 +2080,7 @@ int journal_file_rotate(JournalFile **f) {
sd_id128_to_string(old_file->header->seqnum_id, p + l - 8 + 1);
snprintf(p + l - 8 + 1 + 32, 1 + 16 + 1 + 16 + 8 + 1,
"-%016llx-%016llx.journal",
- (unsigned long long) le64toh((*f)->header->seqnum),
+ (unsigned long long) le64toh((*f)->header->tail_seqnum),
(unsigned long long) le64toh((*f)->header->tail_entry_realtime));
r = rename(old_file->path, p);
@@ -2510,3 +2558,28 @@ int journal_file_get_cutoff_monotonic_usec(JournalFile *f, sd_id128_t boot_id, u
return 1;
}
+
+bool journal_file_rotate_suggested(JournalFile *f) {
+ assert(f);
+
+ /* If we gained new header fields we gained new features,
+ * hence suggest a rotation */
+ if (le64toh(f->header->header_size) < sizeof(Header))
+ return true;
+
+ /* Let's check if the hash tables grew over a certain fill
+ * level (75%, borrowing this value from Java's hash table
+ * implementation), and if so suggest a rotation. To calculate
+ * the fill level we need the n_data field, which only exists
+ * in newer versions. */
+
+ if (JOURNAL_HEADER_CONTAINS(f->header, n_data))
+ if (le64toh(f->header->n_data) * 4ULL > (le64toh(f->header->data_hash_table_size) / sizeof(HashItem)) * 3ULL)
+ return true;
+
+ if (JOURNAL_HEADER_CONTAINS(f->header, n_fields))
+ if (le64toh(f->header->n_fields) * 4ULL > (le64toh(f->header->field_hash_table_size) / sizeof(HashItem)) * 3ULL)
+ return true;
+
+ return false;
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-12-03 02:04:34 +0000