journal: implement parallel traversal in client

1 files changed, 86 insertions, 0 deletions

diff --git a/src/journal/journal-file.h b/src/journal/journal-file.h
new file mode 100644
index 0000000000..55cc7153af
--- /dev/null
+++ b/src/journal/journal-file.h
@@ -0,0 +1,86 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#ifndef foojournalfilehfoo
+#define foojournalfilehfoo
+
+/***
+  This file is part of systemd.
+
+  Copyright 2011 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <inttypes.h>
+
+#include "journal-def.h"
+#include "util.h"
+#include "sd-id128.h"
+
+typedef struct JournalFile {
+        int fd;
+        char *path;
+        struct stat last_stat;
+        int prot;
+        bool writable;
+
+        Header *header;
+
+        HashItem *hash_table;
+        void *hash_table_window;
+        uint64_t hash_table_window_size;
+
+        uint64_t *bisect_table;
+        void *bisect_table_window;
+        uint64_t bisect_table_window_size;
+
+        void *window;
+        uint64_t window_offset;
+        uint64_t window_size;
+
+        uint64_t current_offset;
+} JournalFile;
+
+typedef struct JournalCursor {
+        uint8_t version;
+        uint8_t reserved[7];
+        uint64_t seqnum;
+        sd_id128_t seqnum_id;
+        sd_id128_t boot_id;
+        uint64_t monotonic;
+        uint64_t realtime;
+        uint64_t xor_hash;
+} JournalCursor;
+
+int journal_file_open(const char *fname, int flags, mode_t mode, JournalFile **ret);
+
+void journal_file_close(JournalFile *j);
+
+int journal_file_move_to_object(JournalFile *f, uint64_t offset, int type, Object **ret);
+
+uint64_t journal_file_entry_n_items(Object *o);
+
+int journal_file_append_entry(JournalFile *f, const dual_timestamp *ts, const struct iovec iovec[], unsigned n_iovec, Object **ret, uint64_t *offset);
+
+int journal_file_move_to_entry(JournalFile *f, uint64_t seqnum, Object **ret, uint64_t *offset);
+
+int journal_file_find_first_entry(JournalFile *f, const void *data, uint64_t size, Object **ret, uint64_t *offset);
+int journal_file_find_last_entry(JournalFile *f, const void *data, uint64_t size, Object **ret, uint64_t *offset);
+
+int journal_file_next_entry(JournalFile *f, Object *o, Object **ret, uint64_t *offset);
+int journal_file_prev_entry(JournalFile *f, Object *o, Object **ret, uint64_t *offset);
+
+void journal_file_dump(JournalFile *f);
+
+#endif