size_t FileManagerPosix::numSlots(const block_id block) const {
string filename(blockFilename(block));
struct stat file_stat;
if (stat(filename.c_str(), &file_stat) == -1) {
if (errno != ENOENT) {
LOG_WARNING("Failed to retrieve info about file " << filename << " with error: " << strerror(errno));
}
return 0;
}
if ((file_stat.st_size % kSlotSizeBytes) != 0) {
throw CorruptPersistentStorage();
}
return static_cast<size_t>(file_stat.st_size) / kSlotSizeBytes;
}
size_t FileManagerWindows::numSlots(const block_id block) const {
const string filename(blockFilename(block));
WIN32_FILE_ATTRIBUTE_DATA file_stat;
if (!GetFileAttributesEx(filename.c_str(), GetFileExInfoStandard, &file_stat)) {
DWORD error_code = GetLastError();
if (error_code != ERROR_FILE_NOT_FOUND) {
LOG(ERROR) << "Failed to retrieve info about file " << filename << " with error_code: " << error_code;
}
return 0;
}
uint64_t file_size = (static_cast<uint64_t>(file_stat.nFileSizeHigh) << 32) | file_stat.nFileSizeLow;
if ((file_size % kSlotSizeBytes) != 0) {
throw CorruptPersistentStorage();
}
return static_cast<size_t>(file_size / kSlotSizeBytes);
}
size_t FileManagerHdfs::numSlots(const block_id block) const {
string filename(blockFilename(block));
hdfsFileInfo *file_info = hdfsGetPathInfo(hdfs_, filename.c_str());
if (file_info == nullptr) {
if (errno != ENOENT) {
LOG_WARNING("Failed to get size of file " << filename << " with error: " << strerror(errno));
}
return 0;
}
size_t file_size = file_info->mSize;
hdfsFreeFileInfo(file_info, 1);
if ((file_size % kSlotSizeBytes) != 0) {
throw CorruptPersistentStorage();
}
return file_size / kSlotSizeBytes;
}
