X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fjournal%2Fjournal-file.h;h=b0c28b5e8318cec523995b3c5964e9ac94cafa0d;hb=d12b8cad40aa78fc948362340204c3fde778082d;hp=cdbc8e41f615e9989e00e0ed0746ff15e30776dc;hpb=a4bcff5ba36115495994e9f9ba66074471de76ab;p=elogind.git

diff --git a/src/journal/journal-file.h b/src/journal/journal-file.h
index cdbc8e41f..b0c28b5e8 100644
--- a/src/journal/journal-file.h
+++ b/src/journal/journal-file.h
@@ -37,24 +37,35 @@
 
 typedef struct JournalMetrics {
         uint64_t max_use;
+        uint64_t use;
         uint64_t max_size;
         uint64_t min_size;
         uint64_t keep_free;
 } JournalMetrics;
 
+typedef enum direction {
+        DIRECTION_UP,
+        DIRECTION_DOWN
+} direction_t;
+
 typedef struct JournalFile {
         int fd;
-        char *path;
-        struct stat last_stat;
+
         mode_t mode;
 
         int flags;
         int prot;
-        bool writable;
-        bool compress;
-        bool seal;
+        bool writable:1;
+        bool compress_xz:1;
+        bool compress_lz4:1;
+        bool seal:1;
+
+        bool tail_entry_monotonic_valid:1;
 
-        bool tail_entry_monotonic_valid;
+        direction_t last_direction;
+
+        char *path;
+        struct stat last_stat;
 
         Header *header;
         HashItem *data_hash_table;
@@ -90,11 +101,6 @@ typedef struct JournalFile {
 #endif
 } JournalFile;
 
-typedef enum direction {
-        DIRECTION_UP,
-        DIRECTION_DOWN
-} direction_t;
-
 int journal_file_open(
                 const char *fname,
                 int flags,
@@ -106,6 +112,7 @@ int journal_file_open(
                 JournalFile *template,
                 JournalFile **ret);
 
+int journal_file_set_offline(JournalFile *f);
 void journal_file_close(JournalFile *j);
 
 int journal_file_open_reliably(
@@ -122,6 +129,10 @@ int journal_file_open_reliably(
 #define ALIGN64(x) (((x) + 7ULL) & ~7ULL)
 #define VALID64(x) (((x) & 7ULL) == 0ULL)
 
+/* Use six characters to cover the offsets common in smallish journal
+ * files without adding too many zeros. */
+#define OFSfmt "%06"PRIx64
+
 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);
@@ -143,14 +154,17 @@ static inline bool VALID_EPOCH(uint64_t u) {
 #define JOURNAL_HEADER_SEALED(h) \
         (!!(le32toh((h)->compatible_flags) & HEADER_COMPATIBLE_SEALED))
 
-#define JOURNAL_HEADER_COMPRESSED(h) \
-        (!!(le32toh((h)->incompatible_flags) & HEADER_INCOMPATIBLE_COMPRESSED))
+#define JOURNAL_HEADER_COMPRESSED_XZ(h) \
+        (!!(le32toh((h)->incompatible_flags) & HEADER_INCOMPATIBLE_COMPRESSED_XZ))
+
+#define JOURNAL_HEADER_COMPRESSED_LZ4(h) \
+        (!!(le32toh((h)->incompatible_flags) & HEADER_INCOMPATIBLE_COMPRESSED_LZ4))
 
 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);
+uint64_t journal_file_entry_n_items(Object *o) _pure_;
+uint64_t journal_file_entry_array_n_items(Object *o) _pure_;
+uint64_t journal_file_hash_table_n_items(Object *o) _pure_;
 
 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);
@@ -191,3 +205,23 @@ int journal_file_get_cutoff_realtime_usec(JournalFile *f, usec_t *from, usec_t *
 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, usec_t max_file_usec);
+
+
+static unsigned type_to_context(int type) {
+        /* One context for each type, plus one catch-all for the rest */
+        return type > 0 && type < _OBJECT_TYPE_MAX ? type : 0;
+}
+
+static inline int journal_file_object_keep(JournalFile *f, Object *o, uint64_t offset) {
+        unsigned context = type_to_context(o->object.type);
+
+        return mmap_cache_get(f->mmap, f->fd, f->prot, context, true,
+                              offset, o->object.size, &f->last_stat, NULL);
+}
+
+static inline int journal_file_object_release(JournalFile *f, Object *o, uint64_t offset) {
+        unsigned context = type_to_context(o->object.type);
+
+        return mmap_cache_release(f->mmap, f->fd, f->prot, context,
+                                  offset, o->object.size);
+}