src/journal/journal-internal.h

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 #pragma once
   4
   5 /***
   6   This file is part of systemd.
   7
   8   Copyright 2011 Lennart Poettering
   9
  10   systemd is free software; you can redistribute it and/or modify it
  11   under the terms of the GNU Lesser General Public License as published by
  12   the Free Software Foundation; either version 2.1 of the License, or
  13   (at your option) any later version.
  14
  15   systemd is distributed in the hope that it will be useful, but
  16   WITHOUT ANY WARRANTY; without even the implied warranty of
  17   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  18   Lesser General Public License for more details.
  19
  20   You should have received a copy of the GNU Lesser General Public License
  21   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  22 ***/
  23
  24 #include <sys/types.h>
  25 #include <inttypes.h>
  26 #include <stdbool.h>
  27
  28 #include <systemd/sd-id128.h>
  29
  30 #include "journal-def.h"
  31 #include "list.h"
  32 #include "hashmap.h"
  33 #include "journal-file.h"
  34
  35 typedef struct Match Match;
  36 typedef struct Location Location;
  37 typedef struct Directory Directory;
  38
  39 typedef enum MatchType {
  40         MATCH_DISCRETE,
  41         MATCH_OR_TERM,
  42         MATCH_AND_TERM
  43 } MatchType;
  44
  45 struct Match {
  46         MatchType type;
  47         Match *parent;
  48         LIST_FIELDS(Match, matches);
  49
  50         /* For concrete matches */
  51         char *data;
  52         size_t size;
  53         le64_t le_hash;
  54
  55         /* For terms */
  56         LIST_HEAD(Match, matches);
  57 };
  58
  59 typedef enum LocationType {
  60         /* The first and last entries, resp. */
  61         LOCATION_HEAD,
  62         LOCATION_TAIL,
  63
  64         /* We already read the entry we currently point to, and the
  65          * next one to read should probably not be this one again. */
  66         LOCATION_DISCRETE,
  67
  68         /* We should seek to the precise location specified, and
  69          * return it, as we haven't read it yet. */
  70         LOCATION_SEEK
  71 } LocationType;
  72
  73 struct Location {
  74         LocationType type;
  75
  76         uint64_t seqnum;
  77         sd_id128_t seqnum_id;
  78         bool seqnum_set;
  79
  80         uint64_t realtime;
  81         bool realtime_set;
  82
  83         uint64_t monotonic;
  84         sd_id128_t boot_id;
  85         bool monotonic_set;
  86
  87         uint64_t xor_hash;
  88         bool xor_hash_set;
  89 };
  90
  91 struct Directory {
  92         char *path;
  93         int wd;
  94         bool is_root;
  95 };
  96
  97 struct sd_journal {
  98         int flags;
  99
 100         char *path;
 101
 102         Hashmap *files;
 103         MMapCache *mmap;
 104
 105         Location current_location;
 106
 107         JournalFile *current_file;
 108         uint64_t current_field;
 109
 110         Hashmap *directories_by_path;
 111         Hashmap *directories_by_wd;
 112
 113         int inotify_fd;
 114
 115         Match *level0, *level1;
 116
 117         unsigned current_invalidate_counter, last_invalidate_counter;
 118
 119         char *unique_field;
 120         JournalFile *unique_file;
 121         uint64_t unique_offset;
 122
 123         bool on_network;
 124
 125         size_t data_threshold;
 126 };
 127
 128 char *journal_make_match_string(sd_journal *j);
 129 void journal_print_header(sd_journal *j);