1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
6 This file is part of systemd.
8 Copyright 2011 Lennart Poettering
10 systemd is free software; you can redistribute it and/or modify it
11 under the terms of the GNU Lesser General Public License as published by
12 the Free Software Foundation; either version 2.1 of the License, or
13 (at your option) any later version.
15 systemd is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 Lesser General Public License for more details.
20 You should have received a copy of the GNU Lesser General Public License
21 along with systemd; If not, see <http://www.gnu.org/licenses/>.
30 #include <systemd/sd-id128.h>
32 #include "sparse-endian.h"
33 #include "journal-def.h"
35 #include "mmap-cache.h"
37 typedef struct JournalMetrics {
44 typedef struct JournalFile {
47 struct stat last_stat;
56 bool tail_entry_monotonic_valid;
59 HashItem *data_hash_table;
60 HashItem *field_hash_table;
62 uint64_t current_offset;
64 JournalMetrics metrics;
68 void *compress_buffer;
69 uint64_t compress_buffer_size;
76 FSPRGHeader *fsprg_header;
81 typedef enum direction {
86 int journal_file_open(
92 JournalMetrics *metrics,
94 JournalFile *template,
97 void journal_file_close(JournalFile *j);
99 int journal_file_open_reliably(
105 JournalMetrics *metrics,
107 JournalFile *template,
110 int journal_file_move_to_object(JournalFile *f, int type, uint64_t offset, Object **ret);
112 uint64_t journal_file_entry_n_items(Object *o);
114 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);
116 int journal_file_find_data_object(JournalFile *f, const void *data, uint64_t size, Object **ret, uint64_t *offset);
117 int journal_file_find_data_object_with_hash(JournalFile *f, const void *data, uint64_t size, uint64_t hash, Object **ret, uint64_t *offset);
119 int journal_file_next_entry(JournalFile *f, Object *o, uint64_t p, direction_t direction, Object **ret, uint64_t *offset);
120 int journal_file_skip_entry(JournalFile *f, Object *o, uint64_t p, int64_t skip, Object **ret, uint64_t *offset);
122 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);
124 int journal_file_move_to_entry_by_offset(JournalFile *f, uint64_t seqnum, direction_t direction, Object **ret, uint64_t *offset);
125 int journal_file_move_to_entry_by_seqnum(JournalFile *f, uint64_t seqnum, direction_t direction, Object **ret, uint64_t *offset);
126 int journal_file_move_to_entry_by_realtime(JournalFile *f, uint64_t realtime, direction_t direction, Object **ret, uint64_t *offset);
127 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);
129 int journal_file_move_to_entry_by_offset_for_data(JournalFile *f, uint64_t data_offset, uint64_t p, direction_t direction, Object **ret, uint64_t *offset);
130 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);
131 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);
132 int journal_file_move_to_entry_by_monotonic_for_data(JournalFile *f, uint64_t data_offset, sd_id128_t boot_id, uint64_t monotonic, direction_t direction, Object **ret, uint64_t *offset);
134 int journal_file_copy_entry(JournalFile *from, JournalFile *to, Object *o, uint64_t p, uint64_t *seqnum, Object **ret, uint64_t *offset);
136 void journal_file_dump(JournalFile *f);
137 void journal_file_print_header(JournalFile *f);
139 int journal_file_rotate(JournalFile **f, bool compress, bool authenticate);
141 int journal_directory_vacuum(const char *directory, uint64_t max_use, uint64_t min_free);
143 void journal_file_post_change(JournalFile *f);
145 void journal_default_metrics(JournalMetrics *m, int fd);
147 int journal_file_get_cutoff_realtime_usec(JournalFile *f, usec_t *from, usec_t *to);
148 int journal_file_get_cutoff_monotonic_usec(JournalFile *f, sd_id128_t boot, usec_t *from, usec_t *to);
150 bool journal_file_rotate_suggested(JournalFile *f);
152 int journal_file_append_tag(JournalFile *f);
154 int journal_file_verify(JournalFile *f, const char *key);