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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; )