journal: introduce entry array chain cache

[elogind.git] / src / journal / journal-file.h

diff --git a/src/journal/journal-file.h b/src/journal/journal-file.h
index 2d2bf319a0e7846fd94a8bebc905aca4aa02ff70..cdbc8e41f615e9989e00e0ed0746ff15e30776dc 100644 (file)
--- a/src/journal/journal-file.h
+++ b/src/journal/journal-file.h
@@ -33,6 +33,7 @@
 #include "journal-def.h"
 #include "util.h"
 #include "mmap-cache.h"
+#include "hashmap.h"
 
 typedef struct JournalMetrics {
         uint64_t max_use;
@@ -64,6 +65,8 @@ typedef struct JournalFile {
         JournalMetrics metrics;
         MMapCache *mmap;
 
+        Hashmap *chain_cache;
+
 #ifdef HAVE_XZ
         void *compress_buffer;
         uint64_t compress_buffer_size;
@@ -119,13 +122,35 @@ int journal_file_open_reliably(
 #define ALIGN64(x) (((x) + 7ULL) & ~7ULL)
 #define VALID64(x) (((x) & 7ULL) == 0ULL)
 
+static inline bool VALID_REALTIME(uint64_t u) {
+        /* This considers timestamps until the year 3112 valid. That should be plenty room... */
+        return u > 0 && u < (1ULL << 55);
+}
+
+static inline bool VALID_MONOTONIC(uint64_t u) {
+        /* This considers timestamps until 1142 years of runtime valid. */
+        return u < (1ULL << 55);
+}
+
+static inline bool VALID_EPOCH(uint64_t u) {
+        /* This allows changing the key for 1142 years, every usec. */
+        return u < (1ULL << 55);
+}
+
 #define JOURNAL_HEADER_CONTAINS(h, field) \
         (le64toh((h)->header_size) >= offsetof(Header, field) + sizeof((h)->field))
 
+#define JOURNAL_HEADER_SEALED(h) \
+        (!!(le32toh((h)->compatible_flags) & HEADER_COMPATIBLE_SEALED))
+
+#define JOURNAL_HEADER_COMPRESSED(h) \
+        (!!(le32toh((h)->incompatible_flags) & HEADER_INCOMPATIBLE_COMPRESSED))
+
 int journal_file_move_to_object(JournalFile *f, int type, uint64_t offset, Object **ret);
 
 uint64_t journal_file_entry_n_items(Object *o);
 uint64_t journal_file_entry_array_n_items(Object *o);
+uint64_t journal_file_hash_table_n_items(Object *o);
 
 int journal_file_append_object(JournalFile *f, int type, uint64_t size, Object **ret, uint64_t *offset);
 int journal_file_append_entry(JournalFile *f, const dual_timestamp *ts, const struct iovec iovec[], unsigned n_iovec, uint64_t *seqno, Object **ret, uint64_t *offset);
@@ -133,6 +158,9 @@ int journal_file_append_entry(JournalFile *f, const dual_timestamp *ts, const st
 int journal_file_find_data_object(JournalFile *f, const void *data, uint64_t size, Object **ret, uint64_t *offset);
 int journal_file_find_data_object_with_hash(JournalFile *f, const void *data, uint64_t size, uint64_t hash, Object **ret, uint64_t *offset);
 
+int journal_file_find_field_object(JournalFile *f, const void *field, uint64_t size, Object **ret, uint64_t *offset);
+int journal_file_find_field_object_with_hash(JournalFile *f, const void *field, uint64_t size, uint64_t hash, Object **ret, uint64_t *offset);
+
 int journal_file_next_entry(JournalFile *f, Object *o, uint64_t p, direction_t direction, Object **ret, uint64_t *offset);
 int journal_file_skip_entry(JournalFile *f, Object *o, uint64_t p, int64_t skip, Object **ret, uint64_t *offset);
 
@@ -162,4 +190,4 @@ void journal_default_metrics(JournalMetrics *m, int fd);
 int journal_file_get_cutoff_realtime_usec(JournalFile *f, usec_t *from, usec_t *to);
 int journal_file_get_cutoff_monotonic_usec(JournalFile *f, sd_id128_t boot, usec_t *from, usec_t *to);
 
-bool journal_file_rotate_suggested(JournalFile *f);
+bool journal_file_rotate_suggested(JournalFile *f, usec_t max_file_usec);