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// SPDX-License-Identifier: GPL-3.0-or-later
#include "rrdengine.h"
int check_file_properties(uv_file file, uint64_t *file_size, size_t min_size)
{
int ret;
uv_fs_t req;
uv_stat_t* s;
ret = uv_fs_fstat(NULL, &req, file, NULL);
if (ret < 0) {
fatal("uv_fs_fstat: %s\n", uv_strerror(ret));
}
fatal_assert(req.result == 0);
s = req.ptr;
if (!(s->st_mode & S_IFREG)) {
error("Not a regular file.\n");
uv_fs_req_cleanup(&req);
return UV_EINVAL;
}
if (s->st_size < min_size) {
error("File length is too short.\n");
uv_fs_req_cleanup(&req);
return UV_EINVAL;
}
*file_size = s->st_size;
uv_fs_req_cleanup(&req);
return 0;
}
/**
* Open file for I/O.
*
* @param path The full path of the file.
* @param flags Same flags as the open() system call uses.
* @param file On success sets (*file) to be the uv_file that was opened.
* @param direct Tries to open a file in direct I/O mode when direct=1, falls back to buffered mode if not possible.
* @return Returns UV error number that is < 0 on failure. 0 on success.
*/
int open_file_for_io(char *path, int flags, uv_file *file, int direct)
{
uv_fs_t req;
int fd = -1, current_flags;
fatal_assert(0 == direct || 1 == direct);
for ( ; direct >= 0 ; --direct) {
#ifdef __APPLE__
/* Apple OS does not support O_DIRECT */
direct = 0;
#endif
current_flags = flags;
if (direct) {
current_flags |= O_DIRECT;
}
fd = uv_fs_open(NULL, &req, path, current_flags, S_IRUSR | S_IWUSR, NULL);
if (fd < 0) {
if ((direct) && (UV_EINVAL == fd)) {
error("File \"%s\" does not support direct I/O, falling back to buffered I/O.", path);
} else {
error("Failed to open file \"%s\".", path);
--direct; /* break the loop */
}
} else {
fatal_assert(req.result >= 0);
*file = req.result;
#ifdef __APPLE__
info("Disabling OS X caching for file \"%s\".", path);
fcntl(fd, F_NOCACHE, 1);
#endif
--direct; /* break the loop */
}
uv_fs_req_cleanup(&req);
}
return fd;
}
int is_legacy_child(const char *machine_guid)
{
uuid_t uuid;
char dbengine_file[FILENAME_MAX+1];
if (unlikely(!strcmp(machine_guid, "unittest-dbengine") || !strcmp(machine_guid, "dbengine-dataset") ||
!strcmp(machine_guid, "dbengine-stress-test"))) {
return 1;
}
if (!uuid_parse(machine_guid, uuid)) {
uv_fs_t stat_req;
snprintfz(dbengine_file, FILENAME_MAX, "%s/%s/dbengine", netdata_configured_cache_dir, machine_guid);
int rc = uv_fs_stat(NULL, &stat_req, dbengine_file, NULL);
if (likely(rc == 0 && ((stat_req.statbuf.st_mode & S_IFMT) == S_IFDIR))) {
//info("Found legacy engine folder \"%s\"", dbengine_file);
return 1;
}
}
return 0;
}
int count_legacy_children(char *dbfiles_path)
{
int ret;
uv_fs_t req;
uv_dirent_t dent;
int legacy_engines = 0;
ret = uv_fs_scandir(NULL, &req, dbfiles_path, 0, NULL);
if (ret < 0) {
uv_fs_req_cleanup(&req);
error("uv_fs_scandir(%s): %s", dbfiles_path, uv_strerror(ret));
return ret;
}
while(UV_EOF != uv_fs_scandir_next(&req, &dent)) {
if (dent.type == UV_DIRENT_DIR) {
if (is_legacy_child(dent.name))
legacy_engines++;
}
}
uv_fs_req_cleanup(&req);
return legacy_engines;
}
int compute_multidb_diskspace()
{
char multidb_disk_space_file[FILENAME_MAX + 1];
FILE *fp;
int computed_multidb_disk_quota_mb = -1;
snprintfz(multidb_disk_space_file, FILENAME_MAX, "%s/dbengine_multihost_size", netdata_configured_varlib_dir);
fp = fopen(multidb_disk_space_file, "r");
if (likely(fp)) {
int rc = fscanf(fp, "%d", &computed_multidb_disk_quota_mb);
fclose(fp);
if (unlikely(rc != 1 || computed_multidb_disk_quota_mb < RRDENG_MIN_DISK_SPACE_MB)) {
errno = 0;
error("File '%s' contains invalid input, it will be rebuild", multidb_disk_space_file);
computed_multidb_disk_quota_mb = -1;
}
}
if (computed_multidb_disk_quota_mb == -1) {
int rc = count_legacy_children(netdata_configured_cache_dir);
if (likely(rc >= 0)) {
computed_multidb_disk_quota_mb = (rc + 1) * default_rrdeng_disk_quota_mb;
info("Found %d legacy dbengines, setting multidb diskspace to %dMB", rc, computed_multidb_disk_quota_mb);
fp = fopen(multidb_disk_space_file, "w");
if (likely(fp)) {
fprintf(fp, "%d", computed_multidb_disk_quota_mb);
info("Created file '%s' to store the computed value", multidb_disk_space_file);
fclose(fp);
} else
error("Failed to store the default multidb disk quota size on '%s'", multidb_disk_space_file);
}
else
computed_multidb_disk_quota_mb = default_rrdeng_disk_quota_mb;
}
return computed_multidb_disk_quota_mb;
}
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