3 files changed, 24 insertions(+), 5 deletions(-)

M module-vfs/drivers/src/purefs/fs/filesystem_littlefs.cpp
M module-vfs/include/user/purefs/blkdev/defs.hpp
M module-vfs/src/purefs/blkdev/disk_manager.cpp

@@ 120,10 120,11 @@ namespace
             LOG_ERROR("Block size doesn't match partition size");
             return -ERANGE;
         }
-        cfg->block_count = total_siz / cfg->block_size;
+        cfg->block_count = total_siz / cfg->block_size - 1;
         cfg->read_size  = cfg->block_size;
         cfg->prog_size  = cfg->block_size;
         cfg->cache_size = cfg->block_size;
+        LOG_INFO("LFS: block_count %u sector_size %u", unsigned(cfg->block_count), unsigned(cfg->block_size));
         return 0;
     }
 


@@ 220,13 221,20 @@ namespace purefs::fs::drivers
         }
         {
             auto diskmm = disk_mngr();
-            auto ssize  = diskmm->get_info(disk, blkdev::info_type::sector_size);
+            const auto ssize = diskmm->get_info(disk, blkdev::info_type::sector_size);
             if (ssize < 0) {
                 LOG_ERROR("Unable to read sector size %i", int(ssize));
                 err = ssize;
             }
             else {
-                err = setup_lfs_config(vmnt->lfs_config(), ssize, disk->sectors());
+                auto sect_count = diskmm->get_info(disk, blkdev::info_type::sector_count);
+                if (sect_count > 0) {
+                    err = setup_lfs_config(vmnt->lfs_config(), ssize, sect_count);
+                }
+                else {
+                    LOG_ERROR("Unable to read sector count %i", int(sect_count));
+                    err = sect_count;
+                }
             }
         }
         if (!err) {

@@ 26,7 26,7 @@ namespace purefs::blkdev
     // Information parameter
     enum class info_type
     {
-        sector_count, //! Number of sectors on disk
+        sector_count, //! Number of sectors on disk or part
         sector_size,  //! Single sector size
         erase_block   //! Number of sectors in erase block
     };

@@ 272,7 272,18 @@ namespace purefs::blkdev
             LOG_ERROR("Disk doesn't exists");
             return {};
         }
-        return disk->get_info(what);
+        //! When it is partition as for partition sectors count
+        if (what == info_type::sector_count && dfd->has_partition()) {
+            if (unsigned(dfd->partition()) >= disk->partitions().size()) {
+                LOG_ERROR("Partition number out of range");
+                return -ERANGE;
+            }
+            const auto part = disk->partitions()[dfd->partition()];
+            return part.num_sectors;
+        }
+        else {
+            return disk->get_info(what);
+        }
     }
     auto disk_manager::reread_partitions(disk_fd dfd) -> int
     {