1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
|
// SPDX-License-Identifier: GPL-3.0-or-later
#ifndef NETDATA_LOGFILE_H
#define NETDATA_LOGFILE_H
#include "metadatalogprotocol.h"
#include "../rrdengine.h"
/* Forward declarations */
struct metadata_logfile;
struct metalog_worker_config;
#define METALOG_PREFIX "metadatalog-"
#define METALOG_EXTENSION ".mlf"
#define MAX_METALOGFILE_SIZE (524288LU)
/* Deletions are ignored during compaction, so only creation UUIDs are stored */
struct metalog_record {
uuid_t uuid;
};
#define MAX_METALOG_RECORDS_PER_BLOCK (1024LU)
struct metalog_record_block {
uint64_t file_offset;
uint32_t io_size;
struct metalog_record record_array[MAX_METALOG_RECORDS_PER_BLOCK];
uint16_t records_nr;
struct metalog_record_block *next;
};
struct metalog_records {
/* the record block list is sorted based on disk offset */
struct metalog_record_block *first;
struct metalog_record_block *last;
struct {
struct metalog_record_block *current;
uint16_t record_i;
} iterator;
};
/* only one event loop is supported for now */
struct metadata_logfile {
unsigned fileno; /* Starts at 1 */
unsigned starting_fileno; /* 0 for normal files, staring number during compaction */
uv_file file;
uint64_t pos;
struct metalog_instance *ctx;
struct metalog_records records;
struct metadata_logfile *next;
};
struct metadata_logfile_list {
struct metadata_logfile *first; /* oldest */
struct metadata_logfile *last; /* newest */
};
struct metadata_record_commit_log {
uint64_t record_id;
/* outstanding record buffer */
void *buf;
unsigned buf_pos;
unsigned buf_size;
};
extern void mlf_record_insert(struct metadata_logfile *metalogfile, struct metalog_record *record);
extern struct metalog_record *mlf_record_get_first(struct metadata_logfile *metalogfile);
extern struct metalog_record *mlf_record_get_next(struct metadata_logfile *metalogfile);
extern void mlf_flush_records_buffer(struct metalog_worker_config *wc, struct metadata_record_commit_log *records_log,
struct metadata_logfile_list *metadata_logfiles);
extern void *mlf_get_records_buffer(struct metalog_worker_config *wc, struct metadata_record_commit_log *records_log,
struct metadata_logfile_list *metadata_logfiles, unsigned size);
extern void metadata_logfile_list_insert(struct metadata_logfile_list *metadata_logfiles,
struct metadata_logfile *metalogfile);
extern void metadata_logfile_list_delete(struct metadata_logfile_list *metadata_logfiles,
struct metadata_logfile *metalogfile);
extern void generate_metadata_logfile_path(struct metadata_logfile *metadatalog, char *str, size_t maxlen);
extern void metadata_logfile_init(struct metadata_logfile *metadatalog, struct metalog_instance *ctx,
unsigned tier, unsigned fileno);
extern int rename_metadata_logfile(struct metadata_logfile *metalogfile, unsigned new_starting_fileno,
unsigned new_fileno);
extern int close_metadata_logfile(struct metadata_logfile *metadatalog);
extern int fsync_metadata_logfile(struct metadata_logfile *metalogfile);
extern int unlink_metadata_logfile(struct metadata_logfile *metalogfile);
extern int destroy_metadata_logfile(struct metadata_logfile *metalogfile);
extern int create_metadata_logfile(struct metadata_logfile *metalogfile);
extern int load_metadata_logfile(struct metalog_instance *ctx, struct metadata_logfile *logfile);
extern void init_metadata_record_log(struct metadata_record_commit_log *records_log);
extern int add_new_metadata_logfile(struct metalog_instance *ctx, struct metadata_logfile_list *logfile_list,
unsigned tier, unsigned fileno);
extern int init_metalog_files(struct metalog_instance *ctx);
extern void finalize_metalog_files(struct metalog_instance *ctx);
#endif /* NETDATA_LOGFILE_H */
|
