136 lines
5.2 KiB
C
136 lines
5.2 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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#ifndef foojournalfilehfoo
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#define foojournalfilehfoo
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/***
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This file is part of systemd.
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Copyright 2011 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <inttypes.h>
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#include <systemd/sd-id128.h>
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#include "sparse-endian.h"
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#include "journal-def.h"
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#include "util.h"
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typedef struct Window {
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void *ptr;
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uint64_t offset;
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uint64_t size;
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} Window;
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enum {
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WINDOW_UNKNOWN = OBJECT_UNUSED,
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WINDOW_DATA = OBJECT_DATA,
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WINDOW_ENTRY = OBJECT_ENTRY,
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WINDOW_DATA_HASH_TABLE = OBJECT_DATA_HASH_TABLE,
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WINDOW_FIELD_HASH_TABLE = OBJECT_FIELD_HASH_TABLE,
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WINDOW_ENTRY_ARRAY = OBJECT_ENTRY_ARRAY,
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WINDOW_SIGNATURE = OBJECT_SIGNATURE,
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WINDOW_HEADER,
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_WINDOW_MAX
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};
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typedef struct JournalMetrics {
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uint64_t max_use;
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uint64_t max_size;
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uint64_t min_size;
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uint64_t keep_free;
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} JournalMetrics;
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typedef struct JournalFile {
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int fd;
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char *path;
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struct stat last_stat;
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mode_t mode;
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int flags;
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int prot;
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bool writable;
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bool tail_entry_monotonic_valid;
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Header *header;
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HashItem *data_hash_table;
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HashItem *field_hash_table;
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Window windows[_WINDOW_MAX];
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uint64_t current_offset;
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JournalMetrics metrics;
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bool compress;
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#ifdef HAVE_XZ
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void *compress_buffer;
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uint64_t compress_buffer_size;
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#endif
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} JournalFile;
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typedef enum direction {
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DIRECTION_UP,
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DIRECTION_DOWN
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} direction_t;
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int journal_file_open(const char *fname, int flags, mode_t mode, JournalFile *template, JournalFile **ret);
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void journal_file_close(JournalFile *j);
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int journal_file_open_reliably(const char *fname, int flags, mode_t mode, JournalFile *template, JournalFile **ret);
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int journal_file_move_to_object(JournalFile *f, int type, uint64_t offset, Object **ret);
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uint64_t journal_file_entry_n_items(Object *o);
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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);
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int journal_file_find_data_object(JournalFile *f, const void *data, uint64_t size, Object **ret, uint64_t *offset);
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int journal_file_find_data_object_with_hash(JournalFile *f, const void *data, uint64_t size, uint64_t hash, Object **ret, uint64_t *offset);
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int journal_file_next_entry(JournalFile *f, Object *o, uint64_t p, direction_t direction, Object **ret, uint64_t *offset);
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int journal_file_skip_entry(JournalFile *f, Object *o, uint64_t p, int64_t skip, Object **ret, uint64_t *offset);
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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);
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int journal_file_move_to_entry_by_offset(JournalFile *f, uint64_t seqnum, direction_t direction, Object **ret, uint64_t *offset);
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int journal_file_move_to_entry_by_seqnum(JournalFile *f, uint64_t seqnum, direction_t direction, Object **ret, uint64_t *offset);
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int journal_file_move_to_entry_by_realtime(JournalFile *f, uint64_t realtime, direction_t direction, Object **ret, uint64_t *offset);
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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);
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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);
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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);
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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);
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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);
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int journal_file_copy_entry(JournalFile *from, JournalFile *to, Object *o, uint64_t p, uint64_t *seqnum, Object **ret, uint64_t *offset);
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void journal_file_dump(JournalFile *f);
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int journal_file_rotate(JournalFile **f);
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int journal_directory_vacuum(const char *directory, uint64_t max_use, uint64_t min_free);
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void journal_file_post_change(JournalFile *f);
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void journal_default_metrics(JournalMetrics *m, int fd);
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int journal_file_get_cutoff_realtime_usec(JournalFile *f, usec_t *from, usec_t *to);
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int journal_file_get_cutoff_monotonic_usec(JournalFile *f, sd_id128_t boot, usec_t *from, usec_t *to);
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#endif
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