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 "set.h"
  34 #include "journal-file.h"
  35
  36 typedef struct Match Match;
  37 typedef struct Location Location;
  38 typedef struct Directory Directory;
  39
  40 typedef enum MatchType {
  41         MATCH_DISCRETE,
  42         MATCH_OR_TERM,
  43         MATCH_AND_TERM
  44 } MatchType;
  45
  46 struct Match {
  47         MatchType type;
  48         Match *parent;
  49         LIST_FIELDS(Match, matches);
  50
  51         /* For concrete matches */
  52         char *data;
  53         size_t size;
  54         le64_t le_hash;
  55
  56         /* For terms */
  57         LIST_HEAD(Match, matches);
  58 };
  59
  60 typedef enum LocationType {
  61         /* The first and last entries, resp. */
  62         LOCATION_HEAD,
  63         LOCATION_TAIL,
  64
  65         /* We already read the entry we currently point to, and the
  66          * next one to read should probably not be this one again. */
  67         LOCATION_DISCRETE,
  68
  69         /* We should seek to the precise location specified, and
  70          * return it, as we haven't read it yet. */
  71         LOCATION_SEEK
  72 } LocationType;
  73
  74 struct Location {
  75         LocationType type;
  76
  77         uint64_t seqnum;
  78         sd_id128_t seqnum_id;
  79         bool seqnum_set;
  80
  81         uint64_t realtime;
  82         bool realtime_set;
  83
  84         uint64_t monotonic;
  85         sd_id128_t boot_id;
  86         bool monotonic_set;
  87
  88         uint64_t xor_hash;
  89         bool xor_hash_set;
  90 };
  91
  92 struct Directory {
  93         char *path;
  94         int wd;
  95         bool is_root;
  96 };
  97
  98 struct sd_journal {
  99         int flags;
 100
 101         char *path;
 102
 103         Hashmap *files;
 104         MMapCache *mmap;
 105
 106         Location current_location;
 107
 108         JournalFile *current_file;
 109         uint64_t current_field;
 110
 111         Hashmap *directories_by_path;
 112         Hashmap *directories_by_wd;
 113
 114         int inotify_fd;
 115
 116         Match *level0, *level1;
 117
 118         unsigned current_invalidate_counter, last_invalidate_counter;
 119
 120         char *unique_field;
 121         JournalFile *unique_file;
 122         uint64_t unique_offset;
 123
 124         bool on_network;
 125
 126         size_t data_threshold;
 127
 128         Set *errors;
 129
 130         usec_t last_process_usec;
 131 };
 132
 133 char *journal_make_match_string(sd_journal *j);
 134 void journal_print_header(sd_journal *j);
 135
 136 static inline void journal_closep(sd_journal **j) {
 137         sd_journal_close(*j);
 138 }
 139
 140 #define _cleanup_journal_close_ _cleanup_(journal_closep)