diff options
| -rw-r--r-- | kernel/src/filesystem/ext2/inode.cpp | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/kernel/src/filesystem/ext2/inode.cpp b/kernel/src/filesystem/ext2/inode.cpp index 303838e..cfe0a35 100644 --- a/kernel/src/filesystem/ext2/inode.cpp +++ b/kernel/src/filesystem/ext2/inode.cpp @@ -40,23 +40,29 @@ namespace kernel::filesystem::ext2 auto bytes_read = 0uz; - while (bytes_read < size) + while (bytes_read < requested_size) { auto const block_number = m_filesystem->map_inode_block_index_to_global_block_number(block_index, m_data); - // TODO BA-FS26 really correct? sparse files -> 0 means a full block with zeros --> function - // map_inode_block_index_to_global_block_number should return 0 if not possible to find an block - if (block_number == 0) + if (block_number == -1) { break; } - auto const block_start_offset = block_number * m_filesystem->get_block_size(); - auto const read_offset = block_start_offset + in_block_offset; auto const bytes_to_read = std::min(requested_size - bytes_read, m_filesystem->get_block_size() - in_block_offset); + if (block_number == 0) + { + kstd::libc::memset(static_cast<uint8_t *>(buffer) + bytes_read, 0, bytes_to_read); + bytes_read += bytes_to_read; + } + else + { + auto const block_start_offset = block_number * m_filesystem->get_block_size(); + auto const read_offset = block_start_offset + in_block_offset; - bytes_read += - m_filesystem->backing_inode()->read(static_cast<uint8_t *>(buffer) + bytes_read, read_offset, bytes_to_read); + bytes_read += m_filesystem->backing_inode()->read(static_cast<uint8_t *>(buffer) + bytes_read, read_offset, + bytes_to_read); + } block_index++; in_block_offset = 0; // After the first block, we always start at the beginning of the block |