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Kernel: Use ErrorOr in BlockBased and Ext2 filesystem raw read and write

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These functions used to return booleans which withheld useful
error information for callers. Internally they would suppress
and convert Error objects. We now log or propagate these errors
up the stack.
This commit is contained in:
David Briggs
2022-01-22 19:53:02 -05:00
committed by Linus Groh
parent df6b9cdb0c
commit cf45370c47
5 changed files with 34 additions and 43 deletions
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19
Kernel/FileSystem/ISO9660FileSystem.cpp
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@@ -234,10 +234,10 @@ ErrorOr<void> ISO9660FS::parse_volume_set()
auto current_block_index = first_data_area_block;
while (true) {
bool result = raw_read(BlockIndex { current_block_index }, block_buffer);
if (!result) {
dbgln_if(ISO9660_DEBUG, "Failed to read volume descriptor from ISO file");
return EIO;
auto result = raw_read(BlockIndex { current_block_index }, block_buffer);
if (result.is_error()) {
dbgln_if(ISO9660_DEBUG, "Failed to read volume descriptor from ISO file: {}", result.error());
return result;
}
auto const* header = reinterpret_cast<ISO::VolumeDescriptorHeader const*>(block->data());
@@ -387,11 +387,7 @@ ErrorOr<NonnullRefPtr<ISO9660FS::DirectoryEntry>> ISO9660FS::directory_entry_for
auto blocks = TRY(KBuffer::try_create_with_size(data_length, Memory::Region::Access::Read | Memory::Region::Access::Write, "ISO9660FS: Directory traversal buffer"));
auto blocks_buffer = UserOrKernelBuffer::for_kernel_buffer(blocks->data());
auto did_read = raw_read_blocks(BlockBasedFileSystem::BlockIndex { extent_location }, data_length / logical_block_size(), blocks_buffer);
if (!did_read) {
return EIO;
}
TRY(raw_read_blocks(BlockBasedFileSystem::BlockIndex { extent_location }, data_length / logical_block_size(), blocks_buffer));
auto entry = TRY(DirectoryEntry::try_create(extent_location, data_length, move(blocks)));
m_directory_entry_cache.set(key, entry);
@@ -428,10 +424,7 @@ ErrorOr<size_t> ISO9660Inode::read_bytes(off_t offset, size_t size, UserOrKernel
auto buffer_offset = buffer.offset(nread);
dbgln_if(ISO9660_VERY_DEBUG, "ISO9660Inode::read_bytes: Reading {} bytes into buffer offset {}/{}, logical block index: {}", bytes_to_read, nread, total_bytes, current_block_index.value());
if (bool result = const_cast<ISO9660FS&>(fs()).raw_read(current_block_index, block_buffer); !result) {
return EIO;
}
TRY(const_cast<ISO9660FS&>(fs()).raw_read(current_block_index, block_buffer));
TRY(buffer_offset.write(block->data() + initial_offset, bytes_to_read));
nread += bytes_to_read;