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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once
#include <inttypes.h>
#include <stdbool.h>
#include <sys/types.h>
#include "sd-id128.h"
#include "sd-journal.h"
#include "hashmap.h"
#include "journal-def.h"
#include "journal-file.h"
#include "list.h"
#include "prioq.h"
#define JOURNAL_FILES_MAX 7168u
#define JOURNAL_LOG_RATELIMIT ((const RateLimit) { .interval = 60 * USEC_PER_SEC, .burst = 3 })
typedef struct Match Match;
typedef struct Location Location;
typedef struct Directory Directory;
typedef enum MatchType {
MATCH_DISCRETE,
MATCH_OR_TERM,
MATCH_AND_TERM
} MatchType;
struct Match {
MatchType type;
Match *parent;
LIST_FIELDS(Match, matches);
/* For concrete matches */
char *data;
size_t size;
uint64_t hash; /* old-style jenkins hash. New-style siphash is different per file, hence won't be cached here */
/* For terms */
LIST_HEAD(Match, matches);
};
struct Location {
LocationType type;
bool seqnum_set:1;
bool realtime_set:1;
bool monotonic_set:1;
bool xor_hash_set:1;
uint64_t seqnum;
sd_id128_t seqnum_id;
uint64_t realtime;
uint64_t monotonic;
sd_id128_t boot_id;
uint64_t xor_hash;
};
struct Directory {
sd_journal *journal;
char *path;
int wd;
bool is_root;
unsigned last_seen_generation;
};
typedef struct NewestByBootId {
sd_id128_t boot_id;
Prioq *prioq; /* JournalFile objects ordered by monotonic timestamp of last update. */
} NewestByBootId;
struct sd_journal {
int toplevel_fd;
char *path;
char *prefix;
char *namespace;
OrderedHashmap *files;
IteratedCache *files_cache;
MMapCache *mmap;
/* a bisectable array of NewestByBootId, ordered by boot id. */
NewestByBootId *newest_by_boot_id;
size_t n_newest_by_boot_id;
Location current_location;
JournalFile *current_file;
uint64_t current_field;
Match *level0, *level1, *level2;
Set *exclude_syslog_identifiers;
uint64_t origin_id;
int inotify_fd;
unsigned current_invalidate_counter, last_invalidate_counter;
usec_t last_process_usec;
unsigned generation;
/* Iterating through unique fields and their data values */
char *unique_field;
JournalFile *unique_file;
uint64_t unique_offset;
/* Iterating through known fields */
JournalFile *fields_file;
uint64_t fields_offset;
uint64_t fields_hash_table_index;
char *fields_buffer;
int flags;
bool on_network:1;
bool no_new_files:1;
bool no_inotify:1;
bool unique_file_lost:1; /* File we were iterating over got
removed, and there were no more
files, so sd_j_enumerate_unique
will return a value equal to 0. */
bool fields_file_lost:1;
bool has_runtime_files:1;
bool has_persistent_files:1;
size_t data_threshold;
Hashmap *directories_by_path;
Hashmap *directories_by_wd;
Hashmap *errors;
};
char *journal_make_match_string(sd_journal *j);
void journal_print_header(sd_journal *j);
int journal_get_directories(sd_journal *j, char ***ret);
int journal_add_match_pair(sd_journal *j, const char *field, const char *value);
int journal_add_matchf(sd_journal *j, const char *format, ...) _printf_(2, 3);
#define JOURNAL_FOREACH_DATA_RETVAL(j, data, l, retval) \
for (sd_journal_restart_data(j); ((retval) = sd_journal_enumerate_data((j), &(data), &(l))) > 0; )
/* All errors that we might encounter while extracting a field that are not real errors,
* but only mean that the field is too large or we don't support the compression. */
static inline bool JOURNAL_ERRNO_IS_UNAVAILABLE_FIELD(int r) {
return IN_SET(abs(r),
ENOBUFS, /* Field or decompressed field too large */
E2BIG, /* Field too large for pointer width */
EPROTONOSUPPORT); /* Unsupported compression */
}
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