1 #pragma once 2 3 #include "erase.hpp" 4 #include "util.hpp" 5 6 #include <stdplus/fd/create.hpp> 7 #include <stdplus/fd/managed.hpp> 8 9 #include <chrono> 10 #include <span> 11 #include <string> 12 13 namespace estoraged 14 { 15 using stdplus::fd::Fd; 16 17 class Pattern : public Erase 18 { 19 public: 20 /** @brief Creates a pattern erase object. 21 * 22 * @param[in] inDevPath - the linux device path for the block device. 23 */ Pattern(std::string_view inDevPath)24 Pattern(std::string_view inDevPath) : Erase(inDevPath) {} 25 26 /** @brief writes an incompressible random pattern to the drive, using 27 * default parameters. It also throws errors accordingly. 28 */ writePattern()29 void writePattern() 30 { 31 stdplus::fd::Fd&& fd = 32 stdplus::fd::open(devPath, stdplus::fd::OpenAccess::WriteOnly); 33 writePattern(util::findSizeOfBlockDevice(devPath), fd); 34 } 35 36 /** @brief writes an incompressible random pattern to the drive 37 * and throws errors accordingly. 38 * 39 * @param[in] bytes - Size of the block device 40 * @param[in] fd - the stdplus file descriptor 41 */ 42 void writePattern(uint64_t driveSize, Fd& fd); 43 44 /** @brief verifies the incompressible random pattern is on the drive, using 45 * default parameters. It also throws errors accordingly. 46 */ verifyPattern()47 void verifyPattern() 48 { 49 stdplus::fd::Fd&& fd = 50 stdplus::fd::open(devPath, stdplus::fd::OpenAccess::ReadOnly); 51 verifyPattern(util::findSizeOfBlockDevice(devPath), fd); 52 } 53 54 /** @brief verifies the incompressible random pattern is on the drive 55 * and throws errors accordingly. 56 * 57 * @param[in] bytes - Size of the block device 58 * @param[in] fd - the stdplus file descriptor 59 */ 60 void verifyPattern(uint64_t driveSize, Fd& fd); 61 62 private: 63 static constexpr uint32_t seed = 0x6a656272; 64 static constexpr size_t blockSize = 4096; 65 static constexpr size_t blockSizeUsing32 = blockSize / sizeof(uint32_t); 66 static constexpr size_t maxRetry = 32; 67 static constexpr std::chrono::duration delay = std::chrono::milliseconds(1); 68 }; 69 70 } // namespace estoraged 71