use O_DIRECT

include/reHDD.h

@@ -8,7 +8,7 @@
 #ifndef REHDD_H_
 #define REHDD_H_
 
-#define REHDD_VERSION "V1.3.0"
+#define REHDD_VERSION "V1.2.1"
 
 // Drive handling Settings
 #define WORSE_HOURS 19200    // mark drive if at this limit or beyond

include/shred.h

@@ -19,6 +19,7 @@
 
 #define CHUNK_SIZE 1024 * 1024 * 32 // amount of bytes that are overwritten at once --> 32MB
 #define TFNG_DATA_SIZE CHUNK_SIZE   // amount of bytes used by tfng
+#define O_DIRECT_PAGE_SIZE 4096     // needed page size for O_DIRECT
 
 // #define DEMO_DRIVE_SIZE 1024*1024*256L // 256MB
 // #define DEMO_DRIVE_SIZE 1024*1024*1024L // 1GB
@@ -38,8 +39,8 @@ public:
 private:
     fileDescriptor randomSrcFileDiscr;
     fileDescriptor driveFileDiscr;
-    unsigned char caTfngData[TFNG_DATA_SIZE];
-    unsigned char caReadBuffer[CHUNK_SIZE];
+    unsigned char *caTfngData;
+    unsigned char *caReadBuffer;
     unsigned long ulDriveByteSize;
     unsigned long ulDriveByteOverallCount = 0; // all bytes shredded in all iterations + checking -> used for progress calculation
     double d32Percent = 0.0;

src/reHDD.cpp

@@ -418,8 +418,8 @@ void reHDD::searchDrives(std::list<Drive> *plistDrives)
 }
 
 /**
- * \brief   filter out drives that are listed in "ignoreDrives.conf", loop devices, and optical drives
- * \param   pointer of list <Drive>* plistDrives
+ * \brief   filter out drives that are listed in "ignoreDrives.conf"
+ * \param	pointer of list <Drive>* plistDrives
  * \return  void
  */
 void reHDD::filterIgnoredDrives(list<Drive> *plistDrives)
@@ -428,8 +428,9 @@ void reHDD::filterIgnoredDrives(list<Drive> *plistDrives)
     if (getSystemDrive(systemDrivePath))
     {
         // Logger::logThis()->info("Found system drive: " + systemDrivePath);
-        list<Drive>::iterator it = plistDrives->begin();
-        while (it != plistDrives->end())
+
+        list<Drive>::iterator it;
+        for (it = plistDrives->begin(); it != plistDrives->end(); ++it)
         {
             string driveName = it->getPath();
             // Remove /dev/ prefix
@@ -437,7 +438,6 @@ void reHDD::filterIgnoredDrives(list<Drive> *plistDrives)
             {
                 driveName = driveName.substr(5); // Skip "/dev/"
             }
-
             if (systemDrivePath.find(driveName) != std::string::npos) // compare found system drive and current drive
             {
                 // system drive found --> ignore this drive
@@ -446,123 +446,59 @@ void reHDD::filterIgnoredDrives(list<Drive> *plistDrives)
 #endif
                 it = plistDrives->erase(it);
             }
-            else
-            {
-                ++it;
-            }
         }
     }
 
-    // Filter out loop devices (loop0, loop1, etc.)
-    list<Drive>::iterator it = plistDrives->begin();
-    while (it != plistDrives->end())
-    {
-        string driveName = it->getPath();
-        if (driveName.find("/dev/") == 0)
-        {
-            driveName = driveName.substr(5);
-        }
-
-        if (driveName.find("loop") == 0)
-        {
-#ifdef LOG_LEVEL_HIGH
-            Logger::logThis()->info("loop device found --> ignore this drive: " + it->getPath());
-#endif
-            it = plistDrives->erase(it);
-        }
-        else
-        {
-            ++it;
-        }
-    }
-
-    // Filter out optical drives (sr0, sr1, cdrom, dvd, etc.)
-    it = plistDrives->begin();
-    while (it != plistDrives->end())
-    {
-        string driveName = it->getPath();
-        if (driveName.find("/dev/") == 0)
-        {
-            driveName = driveName.substr(5);
-        }
-
-        if (driveName.find("sr") == 0 ||
-            driveName.find("cdrom") == 0 ||
-            driveName.find("dvd") == 0 ||
-            driveName.find("cdrw") == 0)
-        {
-#ifdef LOG_LEVEL_HIGH
-            Logger::logThis()->info("optical drive found --> ignore this drive: " + it->getPath());
-#endif
-            it = plistDrives->erase(it);
-        }
-        else
-        {
-            ++it;
-        }
-    }
-
-    // Read ignored drives from config file
-    list<tuple<string>> vtlIgnoredDevices;
-    ifstream input("ignoreDrives.conf");
+    list<tuple<string>> vtlIgnoredDevices; // store drives from ignore file
+    ifstream input("ignoreDrives.conf");   // read ignore file
 
     for (string sLine; getline(input, sLine);)
     {
-        // Skip empty lines and comments
-        if (!sLine.empty() && sLine[0] != '#')
-        {
-            vtlIgnoredDevices.emplace_back(sLine);
-        }
+        // Logger::logThis()->info("read uuid: " + sLine);
+        vtlIgnoredDevices.emplace_back(sLine); // add found path and uuid from ignore file to vector
     }
-
-    // Loop through found entries in ignore file
+    // loop through found entries in ignore file
     for (auto row : vtlIgnoredDevices)
     {
-        it = plistDrives->begin();
-        while (it != plistDrives->end())
+        list<Drive>::iterator it;
+        for (it = plistDrives->begin(); it != plistDrives->end(); ++it)
         {
             string sUUID;
             char *cLine = NULL;
             size_t len = 0;
             string sCMD = "blkid ";
             sCMD.append(it->getPath());
-
-            FILE *outputfileBlkid = popen(sCMD.c_str(), "r");
+            // cout << "cmd: " << sCMD << endl;
+            FILE *outputfileBlkid = popen(sCMD.c_str(), "r"); // get UUID from drive
             if (outputfileBlkid == NULL)
             {
-                Logger::logThis()->error("Failed to execute blkid for: " + it->getPath());
-                ++it;
-                continue;
+                exit(EXIT_FAILURE);
             }
 
-            while ((getline(&cLine, &len, outputfileBlkid)) != -1)
+            while ((getline(&cLine, &len, outputfileBlkid)) != -1) // parse UUID from blkid
             {
                 size_t ptuuidPos = string(cLine).find("PTUUID");
                 if (ptuuidPos != string::npos)
                 {
                     string sBlkidOut = string(cLine);
                     sBlkidOut.erase(0, ptuuidPos + 8);
-                    if (sBlkidOut.length() >= 8)
-                    {
-                        sBlkidOut.erase(8, sBlkidOut.length());
-                    }
+                    sBlkidOut.erase(8, sBlkidOut.length());
                     sUUID = sBlkidOut;
+                    // cout << "blkid uuid:" << sUUID << endl;
                 }
             }
             free(cLine);
             pclose(outputfileBlkid);
+            // cout << "blkid uuid:" << sUUID << endl;
 
-            if (!get<0>(row).compare(sUUID))
+            if (!get<0>(row).compare(sUUID)) // compare uuid from ignore file and uuid from drive
             {
+                // same uuid found than in ignore file --> ignore this drive
 #ifdef LOG_LEVEL_HIGH
-                Logger::logThis()->info("same uuid found in ignore file --> ignore this drive: " + it->getPath());
+                Logger::logThis()->info("same uuid found than in ignore file --> ignore this drive: " + it->getPath());
 #endif
                 it = plistDrives->erase(it);
             }
-            else
-            {
-                ++it;
-            }
         }
     }
 }

src/shred.cpp

@@ -21,10 +21,30 @@ const static char *randomsrc = (char *)"/dev/urandom";
 
 Shred::Shred()
 {
+    // Allocate aligned buffers for O_DIRECT
+    if (posix_memalign((void **)&caTfngData, O_DIRECT_PAGE_SIZE, TFNG_DATA_SIZE) != 0)
+    {
+        Logger::logThis()->error("Failed to allocate aligned buffer for tfng data");
+        caTfngData = nullptr;
+    }
+
+    if (posix_memalign((void **)&caReadBuffer, O_DIRECT_PAGE_SIZE, CHUNK_SIZE) != 0)
+    {
+        Logger::logThis()->error("Failed to allocate aligned buffer for read buffer");
+        caReadBuffer = nullptr;
+    }
 }
 
 Shred::~Shred()
 {
+    if (caTfngData != nullptr)
+    {
+        free(caTfngData);
+    }
+    if (caReadBuffer != nullptr)
+    {
+        free(caReadBuffer);
+    }
 }
 
 /**
@@ -43,6 +63,12 @@ int Shred::shredDrive(Drive *drive, int *ipSignalFd)
     drive->u32DriveChecksumAfterShredding = UINT32_MAX;
     drive->state = Drive::TaskState::SHRED_ACTIVE;
 
+    if ((caTfngData == nullptr) || (caReadBuffer == nullptr))
+    {
+        Logger::logThis()->error("Shred-Task: Aligned memory not available! - Drive: " + drive->getSerial());
+        return -1;
+    }
+
 #ifdef DRYRUN
     for (int i = 0; i <= 100; i++)
     {
@@ -69,7 +95,13 @@ int Shred::shredDrive(Drive *drive, int *ipSignalFd)
     }
 
     // open disk
-    driveFileDiscr = open(cpDrivePath, O_RDWR | O_LARGEFILE);
+    driveFileDiscr = open(cpDrivePath, O_RDWR | O_LARGEFILE | O_DIRECT);
+    if (driveFileDiscr == -1 && errno == EINVAL)
+    {
+        driveFileDiscr = open(cpDrivePath, O_RDWR | O_LARGEFILE);
+        Logger::logThis()->warning("O_DIRECT not supported, using standard I/O - Drive: " + drive->getSerial());
+    }
+
     if (driveFileDiscr == -1)
     {
         std::string errorMsg(strerror(errno));