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 <systemd/sd-id128.h>
29 #include "sparse-endian.h"
30 #include "journal-def.h"
33 typedef struct Window
{
40 WINDOW_UNKNOWN
= OBJECT_UNUSED
,
41 WINDOW_DATA
= OBJECT_DATA
,
42 WINDOW_ENTRY
= OBJECT_ENTRY
,
43 WINDOW_DATA_HASH_TABLE
= OBJECT_DATA_HASH_TABLE
,
44 WINDOW_FIELD_HASH_TABLE
= OBJECT_FIELD_HASH_TABLE
,
45 WINDOW_ENTRY_ARRAY
= OBJECT_ENTRY_ARRAY
,
50 typedef struct JournalMetrics
{
57 typedef struct JournalFile
{
60 struct stat last_stat
;
65 bool tail_entry_monotonic_valid
;
68 HashItem
*data_hash_table
;
69 HashItem
*field_hash_table
;
71 Window windows
[_WINDOW_MAX
];
73 uint64_t current_offset
;
75 JournalMetrics metrics
;
80 void *compress_buffer
;
81 uint64_t compress_buffer_size
;
85 typedef enum direction
{
90 int journal_file_open(const char *fname
, int flags
, mode_t mode
, JournalFile
*template, JournalFile
**ret
);
91 void journal_file_close(JournalFile
*j
);
93 int journal_file_open_reliably(const char *fname
, int flags
, mode_t mode
, JournalFile
*template, JournalFile
**ret
);
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 int journal_file_copy_entry(JournalFile
*from
, JournalFile
*to
, Object
*o
, uint64_t p
, uint64_t *seqnum
, Object
**ret
, uint64_t *offset
);
118 void journal_file_dump(JournalFile
*f
);
120 int journal_file_rotate(JournalFile
**f
);
122 int journal_directory_vacuum(const char *directory
, uint64_t max_use
, uint64_t min_free
);
124 void journal_file_post_change(JournalFile
*f
);
126 void journal_default_metrics(JournalMetrics
*m
, int fd
);