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// SPDX-License-Identifier: GPL-3.0-or-later
#include <database/sqlite/sqlite_functions.h>
#include "metadatalog.h"
#include "metalogpluginsd.h"
void generate_metadata_logfile_path(struct metadata_logfile *metalogfile, char *str, size_t maxlen)
{
(void) snprintfz(str, maxlen, "%s/" METALOG_PREFIX METALOG_FILE_NUMBER_PRINT_TMPL METALOG_EXTENSION,
metalogfile->ctx->rrdeng_ctx->dbfiles_path, metalogfile->starting_fileno, metalogfile->fileno);
}
void metadata_logfile_init(struct metadata_logfile *metalogfile, struct metalog_instance *ctx, unsigned starting_fileno,
unsigned fileno)
{
metalogfile->starting_fileno = starting_fileno;
metalogfile->fileno = fileno;
metalogfile->file = (uv_file)0;
metalogfile->pos = 0;
metalogfile->next = NULL;
metalogfile->ctx = ctx;
}
int rename_metadata_logfile(struct metadata_logfile *metalogfile, unsigned new_starting_fileno, unsigned new_fileno)
{
//struct metalog_instance *ctx = metalogfile->ctx;
uv_fs_t req;
int ret;
char oldpath[RRDENG_PATH_MAX], newpath[RRDENG_PATH_MAX];
unsigned backup_starting_fileno, backup_fileno;
backup_starting_fileno = metalogfile->starting_fileno;
backup_fileno = metalogfile->fileno;
generate_metadata_logfile_path(metalogfile, oldpath, sizeof(oldpath));
metalogfile->starting_fileno = new_starting_fileno;
metalogfile->fileno = new_fileno;
generate_metadata_logfile_path(metalogfile, newpath, sizeof(newpath));
info("Renaming metadata log file \"%s\" to \"%s\".", oldpath, newpath);
ret = uv_fs_rename(NULL, &req, oldpath, newpath, NULL);
if (ret < 0) {
error("uv_fs_rename(%s): %s", oldpath, uv_strerror(ret));
//++ctx->stats.fs_errors; /* this is racy, may miss some errors */
rrd_stat_atomic_add(&global_fs_errors, 1);
/* restore previous values */
metalogfile->starting_fileno = backup_starting_fileno;
metalogfile->fileno = backup_fileno;
}
uv_fs_req_cleanup(&req);
return ret;
}
int unlink_metadata_logfile(struct metadata_logfile *metalogfile)
{
//struct metalog_instance *ctx = metalogfile->ctx;
uv_fs_t req;
int ret;
char path[RRDENG_PATH_MAX];
generate_metadata_logfile_path(metalogfile, path, sizeof(path));
ret = uv_fs_unlink(NULL, &req, path, NULL);
if (ret < 0) {
error("uv_fs_fsunlink(%s): %s", path, uv_strerror(ret));
// ++ctx->stats.fs_errors;
rrd_stat_atomic_add(&global_fs_errors, 1);
}
uv_fs_req_cleanup(&req);
return ret;
}
static int check_metadata_logfile_superblock(uv_file file)
{
int ret;
struct rrdeng_metalog_sb *superblock;
uv_buf_t iov;
uv_fs_t req;
ret = posix_memalign((void *)&superblock, RRDFILE_ALIGNMENT, sizeof(*superblock));
if (unlikely(ret)) {
fatal("posix_memalign:%s", strerror(ret));
}
iov = uv_buf_init((void *)superblock, sizeof(*superblock));
ret = uv_fs_read(NULL, &req, file, &iov, 1, 0, NULL);
if (ret < 0) {
error("uv_fs_read: %s", uv_strerror(ret));
uv_fs_req_cleanup(&req);
goto error;
}
fatal_assert(req.result >= 0);
uv_fs_req_cleanup(&req);
if (strncmp(superblock->magic_number, RRDENG_METALOG_MAGIC, RRDENG_MAGIC_SZ)) {
error("File has invalid superblock.");
ret = UV_EINVAL;
} else {
ret = 0;
}
if (superblock->version > RRDENG_METALOG_VER) {
error("File has unknown version %"PRIu16". Compatibility is not guaranteed.", superblock->version);
}
error:
free(superblock);
return ret;
}
void replay_record(struct metadata_logfile *metalogfile, struct rrdeng_metalog_record_header *header, void *payload)
{
struct metalog_instance *ctx = metalogfile->ctx;
char *line, *nextline, *record_end;
int ret;
debug(D_METADATALOG, "RECORD contents: %.*s", (int)header->payload_length, (char *)payload);
record_end = (char *)payload + header->payload_length - 1;
*record_end = '\0';
for (line = payload ; line ; line = nextline) {
nextline = strchr(line, '\n');
if (nextline) {
*nextline++ = '\0';
}
ret = parser_action(ctx->metalog_parser_object->parser, line);
debug(D_METADATALOG, "parser_action ret:%d", ret);
if (ret)
return; /* skip record due to error */
};
}
/* This function only works with buffered I/O */
static inline int metalogfile_read(struct metadata_logfile *metalogfile, void *buf, size_t len, uint64_t offset)
{
// struct metalog_instance *ctx;
uv_file file;
uv_buf_t iov;
uv_fs_t req;
int ret;
// ctx = metalogfile->ctx;
file = metalogfile->file;
iov = uv_buf_init(buf, len);
ret = uv_fs_read(NULL, &req, file, &iov, 1, offset, NULL);
if (unlikely(ret < 0 && ret != req.result)) {
fatal("uv_fs_read: %s", uv_strerror(ret));
}
if (req.result < 0) {
// ++ctx->stats.io_errors;
rrd_stat_atomic_add(&global_io_errors, 1);
error("%s: uv_fs_read - %s - record at offset %"PRIu64"(%u) in metadata logfile %u-%u.", __func__,
uv_strerror((int)req.result), offset, (unsigned)len, metalogfile->starting_fileno, metalogfile->fileno);
}
uv_fs_req_cleanup(&req);
// ctx->stats.io_read_bytes += len;
// ++ctx->stats.io_read_requests;
return ret;
}
/* Return 0 on success */
static int metadata_record_integrity_check(void *record)
{
int ret;
uint32_t data_size;
struct rrdeng_metalog_record_header *header;
struct rrdeng_metalog_record_trailer *trailer;
uLong crc;
header = record;
data_size = header->header_length + header->payload_length;
trailer = record + data_size;
crc = crc32(0L, Z_NULL, 0);
crc = crc32(crc, record, data_size);
ret = crc32cmp(trailer->checksum, crc);
return ret;
}
#define MAX_READ_BYTES (RRDENG_BLOCK_SIZE * 32) /* no record should be over 128KiB in this version */
/*
* Iterates metadata log file records and creates database objects (host/chart/dimension)
*/
static void iterate_records(struct metadata_logfile *metalogfile)
{
uint32_t file_size, pos, bytes_remaining, record_size;
void *buf;
struct rrdeng_metalog_record_header *header;
struct metalog_instance *ctx = metalogfile->ctx;
struct metalog_pluginsd_state *state = ctx->metalog_parser_object->private;
const size_t min_header_size = offsetof(struct rrdeng_metalog_record_header, header_length) +
sizeof(header->header_length);
file_size = metalogfile->pos;
state->metalogfile = metalogfile;
buf = mallocz(MAX_READ_BYTES);
for (pos = sizeof(struct rrdeng_metalog_sb) ; pos < file_size ; pos += record_size) {
bytes_remaining = file_size - pos;
if (bytes_remaining < min_header_size) {
error("%s: unexpected end of file in metadata logfile %u-%u.", __func__, metalogfile->starting_fileno,
metalogfile->fileno);
break;
}
if (metalogfile_read(metalogfile, buf, min_header_size, pos) < 0)
break;
header = (struct rrdeng_metalog_record_header *)buf;
if (METALOG_STORE_PADDING == header->type) {
info("%s: Skipping padding in metadata logfile %u-%u.", __func__, metalogfile->starting_fileno,
metalogfile->fileno);
record_size = ALIGN_BYTES_FLOOR(pos + RRDENG_BLOCK_SIZE) - pos;
continue;
}
if (metalogfile_read(metalogfile, buf + min_header_size, sizeof(*header) - min_header_size,
pos + min_header_size) < 0)
break;
record_size = header->header_length + header->payload_length + sizeof(struct rrdeng_metalog_record_trailer);
if (header->header_length < min_header_size || record_size > bytes_remaining) {
error("%s: Corrupted record in metadata logfile %u-%u.", __func__, metalogfile->starting_fileno,
metalogfile->fileno);
break;
}
if (record_size > MAX_READ_BYTES) {
error("%s: Record is too long (%u bytes) in metadata logfile %u-%u.", __func__, record_size,
metalogfile->starting_fileno, metalogfile->fileno);
continue;
}
if (metalogfile_read(metalogfile, buf + sizeof(*header), record_size - sizeof(*header),
pos + sizeof(*header)) < 0)
break;
if (metadata_record_integrity_check(buf)) {
error("%s: Record at offset %"PRIu32" was read from disk. CRC32 check: FAILED", __func__, pos);
continue;
}
debug(D_METADATALOG, "%s: Record at offset %"PRIu32" was read from disk. CRC32 check: SUCCEEDED", __func__,
pos);
replay_record(metalogfile, header, buf + header->header_length);
}
freez(buf);
}
int load_metadata_logfile(struct metalog_instance *ctx, struct metadata_logfile *metalogfile)
{
UNUSED(ctx);
uv_fs_t req;
uv_file file;
int ret, fd, error;
uint64_t file_size;
char path[RRDENG_PATH_MAX];
generate_metadata_logfile_path(metalogfile, path, sizeof(path));
if (file_is_migrated(path))
return 0;
fd = open_file_buffered_io(path, O_RDWR, &file);
if (fd < 0) {
// ++ctx->stats.fs_errors;
rrd_stat_atomic_add(&global_fs_errors, 1);
return fd;
}
info("Loading metadata log \"%s\".", path);
ret = check_file_properties(file, &file_size, sizeof(struct rrdeng_metalog_sb));
if (ret)
goto error;
ret = check_metadata_logfile_superblock(file);
if (ret)
goto error;
// ctx->stats.io_read_bytes += sizeof(struct rrdeng_jf_sb);
// ++ctx->stats.io_read_requests;
metalogfile->file = file;
metalogfile->pos = file_size;
iterate_records(metalogfile);
info("Metadata log \"%s\" migrated to the database (size:%"PRIu64").", path, file_size);
add_migrated_file(path, file_size);
return 0;
error:
error = ret;
ret = uv_fs_close(NULL, &req, file, NULL);
if (ret < 0) {
error("uv_fs_close(%s): %s", path, uv_strerror(ret));
// ++ctx->stats.fs_errors;
rrd_stat_atomic_add(&global_fs_errors, 1);
}
uv_fs_req_cleanup(&req);
return error;
}
static int scan_metalog_files_cmp(const void *a, const void *b)
{
struct metadata_logfile *file1, *file2;
char path1[RRDENG_PATH_MAX], path2[RRDENG_PATH_MAX];
file1 = *(struct metadata_logfile **)a;
file2 = *(struct metadata_logfile **)b;
generate_metadata_logfile_path(file1, path1, sizeof(path1));
generate_metadata_logfile_path(file2, path2, sizeof(path2));
return strcmp(path1, path2);
}
/* Returns number of metadata logfiles that were loaded or < 0 on error */
static int scan_metalog_files(struct metalog_instance *ctx)
{
int ret;
unsigned starting_no, no, matched_files, i, failed_to_load;
static uv_fs_t req;
uv_dirent_t dent;
struct metadata_logfile **metalogfiles, *metalogfile;
char *dbfiles_path = ctx->rrdeng_ctx->dbfiles_path;
ret = uv_fs_scandir(NULL, &req, dbfiles_path, 0, NULL);
if (ret < 0) {
fatal_assert(req.result < 0);
uv_fs_req_cleanup(&req);
error("uv_fs_scandir(%s): %s", dbfiles_path, uv_strerror(ret));
// ++ctx->stats.fs_errors;
rrd_stat_atomic_add(&global_fs_errors, 1);
return ret;
}
info("Found %d files in path %s", ret, dbfiles_path);
metalogfiles = callocz(MIN(ret, MAX_DATAFILES), sizeof(*metalogfiles));
for (matched_files = 0 ; UV_EOF != uv_fs_scandir_next(&req, &dent) && matched_files < MAX_DATAFILES ; ) {
info("Scanning file \"%s/%s\"", dbfiles_path, dent.name);
ret = sscanf(dent.name, METALOG_PREFIX METALOG_FILE_NUMBER_SCAN_TMPL METALOG_EXTENSION, &starting_no, &no);
if (2 == ret) {
info("Matched file \"%s/%s\"", dbfiles_path, dent.name);
metalogfile = mallocz(sizeof(*metalogfile));
metadata_logfile_init(metalogfile, ctx, starting_no, no);
metalogfiles[matched_files++] = metalogfile;
}
}
uv_fs_req_cleanup(&req);
if (0 == matched_files) {
freez(metalogfiles);
return 0;
}
if (matched_files == MAX_DATAFILES) {
error("Warning: hit maximum database engine file limit of %d files", MAX_DATAFILES);
}
qsort(metalogfiles, matched_files, sizeof(*metalogfiles), scan_metalog_files_cmp);
ret = compaction_failure_recovery(ctx, metalogfiles, &matched_files);
if (ret) { /* If the files are corrupted fail */
for (i = 0 ; i < matched_files ; ++i) {
freez(metalogfiles[i]);
}
freez(metalogfiles);
return UV_EINVAL;
}
//ctx->last_fileno = metalogfiles[matched_files - 1]->fileno;
struct plugind cd = {
.enabled = 1,
.update_every = 0,
.pid = 0,
.serial_failures = 0,
.successful_collections = 0,
.obsolete = 0,
.started_t = INVALID_TIME,
.next = NULL,
.version = 0,
};
struct metalog_pluginsd_state metalog_parser_state;
metalog_pluginsd_state_init(&metalog_parser_state, ctx);
PARSER_USER_OBJECT metalog_parser_object;
metalog_parser_object.enabled = cd.enabled;
metalog_parser_object.host = ctx->rrdeng_ctx->host;
metalog_parser_object.cd = &cd;
metalog_parser_object.trust_durations = 0;
metalog_parser_object.private = &metalog_parser_state;
PARSER *parser = parser_init(metalog_parser_object.host, &metalog_parser_object, NULL, PARSER_INPUT_SPLIT);
if (unlikely(!parser)) {
error("Failed to initialize metadata log parser.");
failed_to_load = matched_files;
goto after_failed_to_parse;
}
parser_add_keyword(parser, PLUGINSD_KEYWORD_HOST, metalog_pluginsd_host);
parser_add_keyword(parser, PLUGINSD_KEYWORD_GUID, pluginsd_guid);
parser_add_keyword(parser, PLUGINSD_KEYWORD_CONTEXT, pluginsd_context);
parser_add_keyword(parser, PLUGINSD_KEYWORD_TOMBSTONE, pluginsd_tombstone);
parser->plugins_action->dimension_action = &metalog_pluginsd_dimension_action;
parser->plugins_action->chart_action = &metalog_pluginsd_chart_action;
parser->plugins_action->guid_action = &metalog_pluginsd_guid_action;
parser->plugins_action->context_action = &metalog_pluginsd_context_action;
parser->plugins_action->tombstone_action = &metalog_pluginsd_tombstone_action;
parser->plugins_action->host_action = &metalog_pluginsd_host_action;
metalog_parser_object.parser = parser;
ctx->metalog_parser_object = &metalog_parser_object;
for (failed_to_load = 0, i = 0 ; i < matched_files ; ++i) {
metalogfile = metalogfiles[i];
db_lock();
db_execute("BEGIN TRANSACTION;");
ret = load_metadata_logfile(ctx, metalogfile);
if (0 != ret) {
error("Deleting invalid metadata log file \"%s/"METALOG_PREFIX METALOG_FILE_NUMBER_PRINT_TMPL
METALOG_EXTENSION"\"", dbfiles_path, metalogfile->starting_fileno, metalogfile->fileno);
unlink_metadata_logfile(metalogfile);
++failed_to_load;
db_execute("ROLLBACK TRANSACTION;");
}
else
db_execute("COMMIT TRANSACTION;");
db_unlock();
freez(metalogfile);
}
matched_files -= failed_to_load;
debug(D_METADATALOG, "PARSER ended");
parser_destroy(parser);
size_t count __maybe_unused = metalog_parser_object.count;
debug(D_METADATALOG, "Parsing count=%u", (unsigned)count);
after_failed_to_parse:
freez(metalogfiles);
return matched_files;
}
/* Return 0 on success. */
int init_metalog_files(struct metalog_instance *ctx)
{
int ret;
char *dbfiles_path = ctx->rrdeng_ctx->dbfiles_path;
ret = scan_metalog_files(ctx);
if (ret < 0) {
error("Failed to scan path \"%s\".", dbfiles_path);
return ret;
}/* else if (0 == ret) {
ctx->last_fileno = 1;
}*/
return 0;
}
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