3 files changed, 13 insertions(+), 5 deletions(-)

M module-vfs/board/linux/purefs/include/purefs/blkdev/disk_image.hpp
M module-vfs/board/linux/purefs/src/blkdev/disk_image.cpp
M module-vfs/include/user/purefs/blkdev/defs.hpp

@@ 24,10 24,11 @@ namespace purefs::blkdev
         auto sync() -> int override;
         auto status() const -> media_status override;
         auto get_info(info_type what) const -> scount_t override;
+        auto erase(sector_t lba, std::size_t count) -> int override;
 
       private:
         int m_filedes{-1};
         unsigned long m_sectors{0};
         std::string m_image_name;
     };
-} // namespace purefs::blkdev>
\ No newline at end of file
+} // namespace purefs::blkdev

@@ 4,6 4,7 @@
 #include <fcntl.h>
 #include <unistd.h>
 #include <stdlib.h>
+#include <cstring>
 #include <sys/stat.h>
 
 namespace purefs::blkdev


@@ 55,6 56,12 @@ namespace purefs::blkdev
         } while (to_write > 0);
         return 0;
     }
+    auto disk_image::erase(sector_t lba, std::size_t count) -> int
+    {
+        char buf[count * sector_size];
+        std::memset(buf, 0xff, count * sector_size);
+        return write(buf, lba, count);
+    }
     auto disk_image::read(void *buf, sector_t lba, std::size_t count) -> int
     {
         auto offs = ::lseek(m_filedes, off_t(lba) * sector_size, SEEK_SET);


@@ 100,7 107,7 @@ namespace purefs::blkdev
         case info_type::sector_count:
             return m_sectors;
         case info_type::erase_block:
-            return 0;
+            return 1;
         }
         return -1;
     }

@@ 26,9 26,9 @@ namespace purefs::blkdev
     // Information parameter
     enum class info_type
     {
-        sector_count,
-        sector_size,
-        erase_block
+        sector_count, //! Number of sectors on disk
+        sector_size,  //! Single sector size
+        erase_block   //! Number of sectors in erase block
     };
 
     //! Power control states