src/journal/journal-internal.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #pragma once
   3
   4 /***
   5   Copyright 2011 Lennart Poettering
   6 ***/
   7
   8 #include <inttypes.h>
   9 #include <stdbool.h>
  10 #include <sys/types.h>
  11
  12 #include "sd-id128.h"
  13 #include "sd-journal.h"
  14
  15 #include "hashmap.h"
  16 #include "journal-def.h"
  17 #include "journal-file.h"
  18 #include "list.h"
  19 #include "set.h"
  20
  21 typedef struct Match Match;
  22 typedef struct Location Location;
  23 typedef struct Directory Directory;
  24
  25 typedef enum MatchType {
  26         MATCH_DISCRETE,
  27         MATCH_OR_TERM,
  28         MATCH_AND_TERM
  29 } MatchType;
  30
  31 struct Match {
  32         MatchType type;
  33         Match *parent;
  34         LIST_FIELDS(Match, matches);
  35
  36         /* For concrete matches */
  37         char *data;
  38         size_t size;
  39         le64_t le_hash;
  40
  41         /* For terms */
  42         LIST_HEAD(Match, matches);
  43 };
  44
  45 struct Location {
  46         LocationType type;
  47
  48         bool seqnum_set;
  49         bool realtime_set;
  50         bool monotonic_set;
  51         bool xor_hash_set;
  52
  53         uint64_t seqnum;
  54         sd_id128_t seqnum_id;
  55
  56         uint64_t realtime;
  57
  58         uint64_t monotonic;
  59         sd_id128_t boot_id;
  60
  61         uint64_t xor_hash;
  62 };
  63
  64 struct Directory {
  65         char *path;
  66         int wd;
  67         bool is_root;
  68         unsigned last_seen_generation;
  69 };
  70
  71 struct sd_journal {
  72         int toplevel_fd;
  73
  74         char *path;
  75         char *prefix;
  76
  77         OrderedHashmap *files;
  78         IteratedCache *files_cache;
  79         MMapCache *mmap;
  80
  81         Location current_location;
  82
  83         JournalFile *current_file;
  84         uint64_t current_field;
  85
  86         Match *level0, *level1, *level2;
  87
  88         pid_t original_pid;
  89
  90         int inotify_fd;
  91         unsigned current_invalidate_counter, last_invalidate_counter;
  92         usec_t last_process_usec;
  93         unsigned generation;
  94
  95         /* Iterating through unique fields and their data values */
  96         char *unique_field;
  97         JournalFile *unique_file;
  98         uint64_t unique_offset;
  99
 100         /* Iterating through known fields */
 101         JournalFile *fields_file;
 102         uint64_t fields_offset;
 103         uint64_t fields_hash_table_index;
 104         char *fields_buffer;
 105         size_t fields_buffer_allocated;
 106
 107         int flags;
 108
 109         bool on_network:1;
 110         bool no_new_files:1;
 111         bool no_inotify:1;
 112         bool unique_file_lost:1; /* File we were iterating over got
 113                                     removed, and there were no more
 114                                     files, so sd_j_enumerate_unique
 115                                     will return a value equal to 0. */
 116         bool fields_file_lost:1;
 117         bool has_runtime_files:1;
 118         bool has_persistent_files:1;
 119
 120         size_t data_threshold;
 121
 122         Hashmap *directories_by_path;
 123         Hashmap *directories_by_wd;
 124
 125         Hashmap *errors;
 126 };
 127
 128 char *journal_make_match_string(sd_journal *j);
 129 void journal_print_header(sd_journal *j);
 130
 131 #define JOURNAL_FOREACH_DATA_RETVAL(j, data, l, retval)                     \
 132         for (sd_journal_restart_data(j); ((retval) = sd_journal_enumerate_data((j), &(data), &(l))) > 0; )