194 lines
7.0 KiB
C
194 lines
7.0 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
|
|
|
|
#pragma once
|
|
|
|
/***
|
|
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 Lesser General Public License as published by
|
|
the Free Software Foundation; either version 2.1 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with systemd; If not, see <http://www.gnu.org/licenses/>.
|
|
***/
|
|
|
|
#include <inttypes.h>
|
|
|
|
#ifdef HAVE_GCRYPT
|
|
#include <gcrypt.h>
|
|
#endif
|
|
|
|
#include <systemd/sd-id128.h>
|
|
|
|
#include "sparse-endian.h"
|
|
#include "journal-def.h"
|
|
#include "util.h"
|
|
#include "mmap-cache.h"
|
|
#include "hashmap.h"
|
|
|
|
typedef struct JournalMetrics {
|
|
uint64_t max_use;
|
|
uint64_t max_size;
|
|
uint64_t min_size;
|
|
uint64_t keep_free;
|
|
} JournalMetrics;
|
|
|
|
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 tail_entry_monotonic_valid;
|
|
|
|
Header *header;
|
|
HashItem *data_hash_table;
|
|
HashItem *field_hash_table;
|
|
|
|
uint64_t current_offset;
|
|
|
|
JournalMetrics metrics;
|
|
MMapCache *mmap;
|
|
|
|
Hashmap *chain_cache;
|
|
|
|
#ifdef HAVE_XZ
|
|
void *compress_buffer;
|
|
uint64_t compress_buffer_size;
|
|
#endif
|
|
|
|
#ifdef HAVE_GCRYPT
|
|
gcry_md_hd_t hmac;
|
|
bool hmac_running;
|
|
|
|
FSSHeader *fss_file;
|
|
size_t fss_file_size;
|
|
|
|
uint64_t fss_start_usec;
|
|
uint64_t fss_interval_usec;
|
|
|
|
void *fsprg_state;
|
|
size_t fsprg_state_size;
|
|
|
|
void *fsprg_seed;
|
|
size_t fsprg_seed_size;
|
|
#endif
|
|
} JournalFile;
|
|
|
|
typedef enum direction {
|
|
DIRECTION_UP,
|
|
DIRECTION_DOWN
|
|
} direction_t;
|
|
|
|
int journal_file_open(
|
|
const char *fname,
|
|
int flags,
|
|
mode_t mode,
|
|
bool compress,
|
|
bool seal,
|
|
JournalMetrics *metrics,
|
|
MMapCache *mmap_cache,
|
|
JournalFile *template,
|
|
JournalFile **ret);
|
|
|
|
void journal_file_close(JournalFile *j);
|
|
|
|
int journal_file_open_reliably(
|
|
const char *fname,
|
|
int flags,
|
|
mode_t mode,
|
|
bool compress,
|
|
bool seal,
|
|
JournalMetrics *metrics,
|
|
MMapCache *mmap_cache,
|
|
JournalFile *template,
|
|
JournalFile **ret);
|
|
|
|
#define ALIGN64(x) (((x) + 7ULL) & ~7ULL)
|
|
#define VALID64(x) (((x) & 7ULL) == 0ULL)
|
|
|
|
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);
|
|
}
|
|
|
|
static inline bool VALID_MONOTONIC(uint64_t u) {
|
|
/* This considers timestamps until 1142 years of runtime valid. */
|
|
return u < (1ULL << 55);
|
|
}
|
|
|
|
static inline bool VALID_EPOCH(uint64_t u) {
|
|
/* This allows changing the key for 1142 years, every usec. */
|
|
return u < (1ULL << 55);
|
|
}
|
|
|
|
#define JOURNAL_HEADER_CONTAINS(h, field) \
|
|
(le64toh((h)->header_size) >= offsetof(Header, field) + sizeof((h)->field))
|
|
|
|
#define JOURNAL_HEADER_SEALED(h) \
|
|
(!!(le32toh((h)->compatible_flags) & HEADER_COMPATIBLE_SEALED))
|
|
|
|
#define JOURNAL_HEADER_COMPRESSED(h) \
|
|
(!!(le32toh((h)->incompatible_flags) & HEADER_INCOMPATIBLE_COMPRESSED))
|
|
|
|
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);
|
|
|
|
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);
|
|
|
|
int journal_file_find_data_object(JournalFile *f, const void *data, uint64_t size, Object **ret, uint64_t *offset);
|
|
int journal_file_find_data_object_with_hash(JournalFile *f, const void *data, uint64_t size, uint64_t hash, Object **ret, uint64_t *offset);
|
|
|
|
int journal_file_find_field_object(JournalFile *f, const void *field, uint64_t size, Object **ret, uint64_t *offset);
|
|
int journal_file_find_field_object_with_hash(JournalFile *f, const void *field, uint64_t size, uint64_t hash, Object **ret, uint64_t *offset);
|
|
|
|
int journal_file_next_entry(JournalFile *f, Object *o, uint64_t p, direction_t direction, Object **ret, uint64_t *offset);
|
|
int journal_file_skip_entry(JournalFile *f, Object *o, uint64_t p, int64_t skip, Object **ret, uint64_t *offset);
|
|
|
|
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);
|
|
|
|
int journal_file_move_to_entry_by_offset(JournalFile *f, uint64_t seqnum, direction_t direction, Object **ret, uint64_t *offset);
|
|
int journal_file_move_to_entry_by_seqnum(JournalFile *f, uint64_t seqnum, direction_t direction, Object **ret, uint64_t *offset);
|
|
int journal_file_move_to_entry_by_realtime(JournalFile *f, uint64_t realtime, direction_t direction, Object **ret, uint64_t *offset);
|
|
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);
|
|
|
|
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);
|
|
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);
|
|
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);
|
|
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);
|
|
|
|
int journal_file_copy_entry(JournalFile *from, JournalFile *to, Object *o, uint64_t p, uint64_t *seqnum, Object **ret, uint64_t *offset);
|
|
|
|
void journal_file_dump(JournalFile *f);
|
|
void journal_file_print_header(JournalFile *f);
|
|
|
|
int journal_file_rotate(JournalFile **f, bool compress, bool seal);
|
|
|
|
void journal_file_post_change(JournalFile *f);
|
|
|
|
void journal_default_metrics(JournalMetrics *m, int fd);
|
|
|
|
int journal_file_get_cutoff_realtime_usec(JournalFile *f, usec_t *from, usec_t *to);
|
|
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);
|