src/journal/journal-internal.h

   1 #pragma once
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2011 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU Lesser General Public License as published by
  10   the Free Software Foundation; either version 2.1 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <inttypes.h>
  23 #include <stdbool.h>
  24 #include <sys/types.h>
  25
  26 #include "sd-id128.h"
  27 #include "sd-journal.h"
  28
  29 #include "hashmap.h"
  30 #include "journal-def.h"
  31 #include "journal-file.h"
  32 #include "list.h"
  33 #include "set.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 struct Location {
  60         LocationType type;
  61
  62         bool seqnum_set;
  63         bool realtime_set;
  64         bool monotonic_set;
  65         bool xor_hash_set;
  66
  67         uint64_t seqnum;
  68         sd_id128_t seqnum_id;
  69
  70         uint64_t realtime;
  71
  72         uint64_t monotonic;
  73         sd_id128_t boot_id;
  74
  75         uint64_t xor_hash;
  76 };
  77
  78 struct Directory {
  79         char *path;
  80         int wd;
  81         bool is_root;
  82 };
  83
  84 struct sd_journal {
  85         int toplevel_fd;
  86
  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         /* Iterating through unique fields and their data values */
 107         char *unique_field;
 108         JournalFile *unique_file;
 109         uint64_t unique_offset;
 110
 111         /* Iterating through known fields */
 112         JournalFile *fields_file;
 113         uint64_t fields_offset;
 114         uint64_t fields_hash_table_index;
 115         char *fields_buffer;
 116         size_t fields_buffer_allocated;
 117
 118         int flags;
 119
 120         bool on_network:1;
 121         bool no_new_files:1;
 122         bool no_inotify:1;
 123         bool unique_file_lost:1; /* File we were iterating over got
 124                                     removed, and there were no more
 125                                     files, so sd_j_enumerate_unique
 126                                     will return a value equal to 0. */
 127         bool fields_file_lost:1;
 128         bool has_runtime_files:1;
 129         bool has_persistent_files:1;
 130
 131         size_t data_threshold;
 132
 133         Hashmap *directories_by_path;
 134         Hashmap *directories_by_wd;
 135
 136         Hashmap *errors;
 137 };
 138
 139 char *journal_make_match_string(sd_journal *j);
 140 void journal_print_header(sd_journal *j);
 141
 142 #define JOURNAL_FOREACH_DATA_RETVAL(j, data, l, retval)                     \
 143         for (sd_journal_restart_data(j); ((retval) = sd_journal_enumerate_data((j), &(data), &(l))) > 0; )