X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fjournal%2Fjournal-file.h;h=21b0821b6b246fbb5cf98cb82a4cded6cc1f64b4;hp=20712b5dcc341d29347bda10ca5558ddf53312b8;hb=b8e891e699e1336c5527f8203e4e8f67c9bbeb84;hpb=bc85bfee87e11317fbcd1160c9003860dc6edde9 diff --git a/src/journal/journal-file.h b/src/journal/journal-file.h index 20712b5dc..21b0821b6 100644 --- a/src/journal/journal-file.h +++ b/src/journal/journal-file.h @@ -1,7 +1,6 @@ /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ -#ifndef foojournalfilehfoo -#define foojournalfilehfoo +#pragma once /*** This file is part of systemd. @@ -9,107 +8,191 @@ Copyright 2011 Lennart Poettering systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or + 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 - General Public License for more details. + Lesser General Public License for more details. - You should have received a copy of the GNU General Public License + You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see . ***/ #include +#ifdef HAVE_GCRYPT +#include +#endif + +#include + +#include "sparse-endian.h" #include "journal-def.h" #include "util.h" -#include "sd-id128.h" - -#define DEFAULT_MAX_SIZE (1024ULL*128ULL) -#define DEFAULT_MIN_SIZE (256ULL*1024ULL) -#define DEFAULT_KEEP_FREE (1ULL*1024ULL*1024ULL) -#define DEFAULT_MAX_USE (16ULL*1024ULL*1024ULL*16ULL) - -typedef struct Window { - void *ptr; - uint64_t offset; - uint64_t size; -} Window; - -enum { - WINDOW_UNKNOWN = OBJECT_UNUSED, - WINDOW_DATA = OBJECT_DATA, - WINDOW_ENTRY = OBJECT_ENTRY, - WINDOW_DATA_HASH_TABLE = OBJECT_DATA_HASH_TABLE, - WINDOW_FIELD_HASH_TABLE = OBJECT_FIELD_HASH_TABLE, - WINDOW_ENTRY_ARRAY = OBJECT_ENTRY_ARRAY, - WINDOW_HEADER, - _WINDOW_MAX -}; +#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 enum direction { + DIRECTION_UP, + DIRECTION_DOWN +} direction_t; + typedef struct JournalFile { int fd; - char *path; - struct stat last_stat; + mode_t mode; + int flags; int prot; - bool writable; - bool tail_entry_monotonic_valid; + bool writable:1; + bool compress:1; + bool seal:1; + + bool tail_entry_monotonic_valid:1; + + direction_t last_direction; + + char *path; + struct stat last_stat; Header *header; HashItem *data_hash_table; HashItem *field_hash_table; - Window windows[_WINDOW_MAX]; - uint64_t current_offset; JournalMetrics metrics; -} JournalFile; + MMapCache *mmap; -typedef enum direction { - DIRECTION_UP, - DIRECTION_DOWN -} direction_t; + Hashmap *chain_cache; -int journal_file_open(const char *fname, int flags, mode_t mode, JournalFile *template, JournalFile **ret); +#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; + +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) + +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_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, 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); +int journal_file_rotate(JournalFile **f, bool compress, bool seal); -int journal_directory_vacuum(const char *directory, uint64_t max_use, uint64_t min_free); +void journal_file_post_change(JournalFile *f); -#endif +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);