1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
3 #ifndef foojournalfilehfoo
4 #define foojournalfilehfoo
7 This file is part of systemd.
9 Copyright 2011 Lennart Poettering
11 systemd is free software; you can redistribute it and/or modify it
12 under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 2 of the License, or
14 (at your option) any later version.
16 systemd is distributed in the hope that it will be useful, but
17 WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with systemd; If not, see <http://www.gnu.org/licenses/>.
27 #include "journal-def.h"
31 #define DEFAULT_MAX_SIZE (1024ULL*128ULL)
32 #define DEFAULT_MIN_SIZE (256ULL*1024ULL)
33 #define DEFAULT_KEEP_FREE (1ULL*1024ULL*1024ULL)
34 #define DEFAULT_MAX_USE (16ULL*1024ULL*1024ULL*16ULL)
36 typedef struct Window {
43 WINDOW_UNKNOWN = OBJECT_UNUSED,
44 WINDOW_DATA = OBJECT_DATA,
45 WINDOW_ENTRY = OBJECT_ENTRY,
46 WINDOW_DATA_HASH_TABLE = OBJECT_DATA_HASH_TABLE,
47 WINDOW_FIELD_HASH_TABLE = OBJECT_FIELD_HASH_TABLE,
48 WINDOW_ENTRY_ARRAY = OBJECT_ENTRY_ARRAY,
53 typedef struct JournalMetrics {
59 typedef struct JournalFile {
62 struct stat last_stat;
67 bool tail_entry_monotonic_valid;
70 HashItem *data_hash_table;
71 HashItem *field_hash_table;
73 Window windows[_WINDOW_MAX];
75 uint64_t current_offset;
77 JournalMetrics metrics;
82 void *compress_buffer;
83 size_t compress_buffer_size;
87 typedef enum direction {
92 int journal_file_open(const char *fname, int flags, mode_t mode, JournalFile *template, JournalFile **ret);
93 void journal_file_close(JournalFile *j);
95 int journal_file_move_to_object(JournalFile *f, int type, uint64_t offset, Object **ret);
97 uint64_t journal_file_entry_n_items(Object *o);
99 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);
101 int journal_file_find_data_object(JournalFile *f, const void *data, uint64_t size, Object **ret, uint64_t *offset);
102 int journal_file_find_data_object_with_hash(JournalFile *f, const void *data, uint64_t size, uint64_t hash, Object **ret, uint64_t *offset);
104 int journal_file_next_entry(JournalFile *f, Object *o, uint64_t p, direction_t direction, Object **ret, uint64_t *offset);
105 int journal_file_skip_entry(JournalFile *f, Object *o, uint64_t p, int64_t skip, Object **ret, uint64_t *offset);
107 int journal_file_next_entry_for_data(JournalFile *f, Object *o, uint64_t p, uint64_t data_offset, direction_t direction, Object **ret, uint64_t *offset);
109 int journal_file_move_to_entry_by_seqnum(JournalFile *f, uint64_t seqnum, direction_t direction, Object **ret, uint64_t *offset);
110 int journal_file_move_to_entry_by_realtime(JournalFile *f, uint64_t realtime, direction_t direction, Object **ret, uint64_t *offset);
111 int journal_file_move_to_entry_by_monotonic(JournalFile *f, sd_id128_t boot_id, uint64_t monotonic, direction_t direction, Object **ret, uint64_t *offset);
113 int journal_file_move_to_entry_by_seqnum_for_data(JournalFile *f, uint64_t data_offset, uint64_t seqnum, direction_t direction, Object **ret, uint64_t *offset);
114 int journal_file_move_to_entry_by_realtime_for_data(JournalFile *f, uint64_t data_offset, uint64_t realtime, direction_t direction, Object **ret, uint64_t *offset);
116 void journal_file_dump(JournalFile *f);
118 int journal_file_rotate(JournalFile **f);
120 int journal_directory_vacuum(const char *directory, uint64_t max_use, uint64_t min_free);