+++ /dev/null
-/*-*- 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 "sd-id128.h"
-
-#include "sparse-endian.h"
-#include "journal-def.h"
-#include "macro.h"
-#include "mmap-cache.h"
-#include "hashmap.h"
-
-typedef struct JournalMetrics {
- uint64_t max_use;
- uint64_t use;
- uint64_t max_size;
- uint64_t min_size;
- uint64_t keep_free;
-} JournalMetrics;
-
-typedef enum direction {
- DIRECTION_UP,
- DIRECTION_DOWN
-} direction_t;
-
-typedef enum LocationType {
- /* The first and last entries, resp. */
- LOCATION_HEAD,
- LOCATION_TAIL,
-
- /* We already read the entry we currently point to, and the
- * next one to read should probably not be this one again. */
- LOCATION_DISCRETE,
-
- /* We should seek to the precise location specified, and
- * return it, as we haven't read it yet. */
- LOCATION_SEEK
-} LocationType;
-
-typedef struct JournalFile {
- int fd;
-
- mode_t mode;
-
- int flags;
- int prot;
- bool writable:1;
- bool compress_xz:1;
- bool compress_lz4:1;
- bool seal:1;
- bool defrag_on_close:1;
-
- bool tail_entry_monotonic_valid:1;
-
- direction_t last_direction;
- LocationType location_type;
- uint64_t last_n_entries;
-
- char *path;
- struct stat last_stat;
- usec_t last_stat_usec;
-
- Header *header;
- HashItem *data_hash_table;
- HashItem *field_hash_table;
-
- uint64_t current_offset;
- uint64_t current_seqnum;
- uint64_t current_realtime;
- uint64_t current_monotonic;
- sd_id128_t current_boot_id;
- uint64_t current_xor_hash;
-
- JournalMetrics metrics;
- MMapCache *mmap;
-
- OrderedHashmap *chain_cache;
-
-#if defined(HAVE_XZ) || defined(HAVE_LZ4)
- void *compress_buffer;
- size_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;
-
-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);
-
-int journal_file_set_offline(JournalFile *f);
-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)
-
-/* Use six characters to cover the offsets common in smallish journal
- * files without adding too many zeros. */
-#define OFSfmt "%06"PRIx64
-
-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_XZ(h) \
- (!!(le32toh((h)->incompatible_flags) & HEADER_INCOMPATIBLE_COMPRESSED_XZ))
-
-#define JOURNAL_HEADER_COMPRESSED_LZ4(h) \
- (!!(le32toh((h)->incompatible_flags) & HEADER_INCOMPATIBLE_COMPRESSED_LZ4))
-
-int journal_file_move_to_object(JournalFile *f, ObjectType type, uint64_t offset, Object **ret);
-
-uint64_t journal_file_entry_n_items(Object *o) _pure_;
-uint64_t journal_file_entry_array_n_items(Object *o) _pure_;
-uint64_t journal_file_hash_table_n_items(Object *o) _pure_;
-
-int journal_file_append_object(JournalFile *f, ObjectType 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);
-
-void journal_file_reset_location(JournalFile *f);
-void journal_file_save_location(JournalFile *f, Object *o, uint64_t offset);
-int journal_file_compare_locations(JournalFile *af, JournalFile *bf);
-int journal_file_next_entry(JournalFile *f, uint64_t p, direction_t direction, 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_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);
~ianmdlvl / elogind.git / blobdiff