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 "sd-id128.h"
  29 #include "sd-journal.h"
  30
  31 #include "hashmap.h"
  32 #include "journal-def.h"
  33 #include "journal-file.h"
  34 #include "list.h"
  35 #include "set.h"
  36
  37 typedef struct Match Match;
  38 typedef struct Location Location;
  39 typedef struct Directory Directory;
  40
  41 typedef enum MatchType {
  42         MATCH_DISCRETE,
  43         MATCH_OR_TERM,
  44         MATCH_AND_TERM
  45 } MatchType;
  46
  47 struct Match {
  48         MatchType type;
  49         Match *parent;
  50         LIST_FIELDS(Match, matches);
  51
  52         /* For concrete matches */
  53         char *data;
  54         size_t size;
  55         le64_t le_hash;
  56
  57         /* For terms */
  58         LIST_HEAD(Match, matches);
  59 };
  60
  61 struct Location {
  62         LocationType type;
  63
  64         bool seqnum_set;
  65         bool realtime_set;
  66         bool monotonic_set;
  67         bool xor_hash_set;
  68
  69         uint64_t seqnum;
  70         sd_id128_t seqnum_id;
  71
  72         uint64_t realtime;
  73
  74         uint64_t monotonic;
  75         sd_id128_t boot_id;
  76
  77         uint64_t xor_hash;
  78 };
  79
  80 struct Directory {
  81         char *path;
  82         int wd;
  83         bool is_root;
  84 };
  85
  86 struct sd_journal {
  87         char *path;
  88         char *prefix;
  89
  90         OrderedHashmap *files;
  91         MMapCache *mmap;
  92
  93         Location current_location;
  94
  95         JournalFile *current_file;
  96         uint64_t current_field;
  97
  98         Match *level0, *level1, *level2;
  99
 100         pid_t original_pid;
 101
 102         int inotify_fd;
 103         unsigned current_invalidate_counter, last_invalidate_counter;
 104         usec_t last_process_usec;
 105
 106         char *unique_field;
 107         JournalFile *unique_file;
 108         uint64_t unique_offset;
 109
 110         int flags;
 111
 112         bool on_network;
 113         bool no_new_files;
 114         bool unique_file_lost; /* File we were iterating over got
 115                                   removed, and there were no more
 116                                   files, so sd_j_enumerate_unique
 117                                   will return a value equal to 0. */
 118
 119         size_t data_threshold;
 120
 121         Hashmap *directories_by_path;
 122         Hashmap *directories_by_wd;
 123
 124         Hashmap *errors;
 125 };
 126
 127 char *journal_make_match_string(sd_journal *j);
 128 void journal_print_header(sd_journal *j);
 129
 130 DEFINE_TRIVIAL_CLEANUP_FUNC(sd_journal*, sd_journal_close);
 131 #define _cleanup_journal_close_ _cleanup_(sd_journal_closep)
 132
 133 #define JOURNAL_FOREACH_DATA_RETVAL(j, data, l, retval)                     \
 134         for (sd_journal_restart_data(j); ((retval) = sd_journal_enumerate_data((j), &(data), &(l))) > 0; )