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Kernel: Make block-based file system code 64 bit ready

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Jean-Baptiste Boric 2021-03-18 22:58:21 +01:00 • committed by Andreas Kling
parent 6698fd84ff
commit eea5a5ed5d
3 changed files with 32 additions and 32 deletions
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4
Kernel/FileSystem/BlockBasedFileSystem.cpp
View file

@ -235,7 +235,7 @@ KResult BlockBasedFS::read_block(BlockIndex index, UserOrKernelBuffer* buffer, s
if (!allow_cache) { if (!allow_cache) {
const_cast<BlockBasedFS*>(this)->flush_specific_block_if_needed(index); const_cast<BlockBasedFS*>(this)->flush_specific_block_if_needed(index);
size_t base_offset = index.value() * block_size() + offset; auto base_offset = index.value() * block_size() + offset;
file_description().seek(base_offset, SEEK_SET); file_description().seek(base_offset, SEEK_SET);
auto nread = file_description().read(*buffer, count); auto nread = file_description().read(*buffer, count);
if (nread.is_error()) if (nread.is_error())
@ -246,7 +246,7 @@ KResult BlockBasedFS::read_block(BlockIndex index, UserOrKernelBuffer* buffer, s
auto& entry = cache().get(index); auto& entry = cache().get(index);
if (!entry.has_data) { if (!entry.has_data) {
size_t base_offset = index.value() * block_size(); auto base_offset = index.value() * block_size();
file_description().seek(base_offset, SEEK_SET); file_description().seek(base_offset, SEEK_SET);
auto entry_data_buffer = UserOrKernelBuffer::for_kernel_buffer(entry.data); auto entry_data_buffer = UserOrKernelBuffer::for_kernel_buffer(entry.data);
auto nread = file_description().read(entry_data_buffer, block_size()); auto nread = file_description().read(entry_data_buffer, block_size());

2
Kernel/FileSystem/BlockBasedFileSystem.h
View file

@ -32,7 +32,7 @@ namespace Kernel {
class BlockBasedFS : public FileBackedFS { class BlockBasedFS : public FileBackedFS {
public: public:
TYPEDEF_DISTINCT_ORDERED_ID(unsigned, BlockIndex); TYPEDEF_DISTINCT_ORDERED_ID(u64, BlockIndex);
virtual ~BlockBasedFS() override; virtual ~BlockBasedFS() override;

58
Kernel/FileSystem/Ext2FileSystem.cpp
View file

@ -240,7 +240,7 @@ KResult Ext2FSInode::write_indirect_block(BlockBasedFS::BlockIndex block, Span<B
VERIFY(blocks_indexes.size() <= EXT2_ADDR_PER_BLOCK(&fs().super_block())); VERIFY(blocks_indexes.size() <= EXT2_ADDR_PER_BLOCK(&fs().super_block()));
for (unsigned i = 0; i < blocks_indexes.size(); ++i) for (unsigned i = 0; i < blocks_indexes.size(); ++i)
stream << blocks_indexes[i].value(); stream << static_cast<u32>(blocks_indexes[i].value());
stream.fill_to_end(0); stream.fill_to_end(0);
return fs().write_block(block, buffer, stream.size()); return fs().write_block(block, buffer, stream.size());
@ -269,11 +269,11 @@ KResult Ext2FSInode::grow_doubly_indirect_block(BlockBasedFS::BlockIndex block,
// Grow the doubly indirect block. // Grow the doubly indirect block.
for (unsigned i = 0; i < old_indirect_blocks_length; i++) for (unsigned i = 0; i < old_indirect_blocks_length; i++)
stream << block_as_pointers[i]; stream << static_cast<u32>(block_as_pointers[i]);
for (unsigned i = old_indirect_blocks_length; i < new_indirect_blocks_length; i++) { for (unsigned i = old_indirect_blocks_length; i < new_indirect_blocks_length; i++) {
auto new_block = new_meta_blocks.take_last().value(); auto new_block = new_meta_blocks.take_last().value();
dbgln_if(EXT2_BLOCKLIST_DEBUG, "Ext2FSInode[{}]::grow_doubly_indirect_block(): Allocating indirect block {} at index {}", identifier(), new_block, i); dbgln_if(EXT2_BLOCKLIST_DEBUG, "Ext2FSInode[{}]::grow_doubly_indirect_block(): Allocating indirect block {} at index {}", identifier(), new_block, i);
stream << new_block; stream << static_cast<u32>(new_block);
meta_blocks++; meta_blocks++;
} }
stream.fill_to_end(0); stream.fill_to_end(0);
@ -352,11 +352,11 @@ KResult Ext2FSInode::grow_triply_indirect_block(BlockBasedFS::BlockIndex block,
// Grow the triply indirect block. // Grow the triply indirect block.
for (unsigned i = 0; i < old_doubly_indirect_blocks_length; i++) for (unsigned i = 0; i < old_doubly_indirect_blocks_length; i++)
stream << block_as_pointers[i]; stream << static_cast<u32>(block_as_pointers[i]);
for (unsigned i = old_doubly_indirect_blocks_length; i < new_doubly_indirect_blocks_length; i++) { for (unsigned i = old_doubly_indirect_blocks_length; i < new_doubly_indirect_blocks_length; i++) {
auto new_block = new_meta_blocks.take_last().value(); auto new_block = new_meta_blocks.take_last().value();
dbgln_if(EXT2_BLOCKLIST_DEBUG, "Ext2FSInode[{}]::grow_triply_indirect_block(): Allocating doubly indirect block {} at index {}", identifier(), new_block, i); dbgln_if(EXT2_BLOCKLIST_DEBUG, "Ext2FSInode[{}]::grow_triply_indirect_block(): Allocating doubly indirect block {} at index {}", identifier(), new_block, i);
stream << new_block; stream << static_cast<u32>(new_block);
meta_blocks++; meta_blocks++;
} }
stream.fill_to_end(0); stream.fill_to_end(0);
@ -451,7 +451,7 @@ KResult Ext2FSInode::flush_block_list()
bool inode_dirty = false; bool inode_dirty = false;
VERIFY(new_shape.direct_blocks <= EXT2_NDIR_BLOCKS); VERIFY(new_shape.direct_blocks <= EXT2_NDIR_BLOCKS);
for (unsigned i = 0; i < new_shape.direct_blocks; ++i) { for (unsigned i = 0; i < new_shape.direct_blocks; ++i) {
if (m_raw_inode.i_block[i] != m_block_list[output_block_index]) if (BlockBasedFS::BlockIndex(m_raw_inode.i_block[i]) != m_block_list[output_block_index])
inode_dirty = true; inode_dirty = true;
m_raw_inode.i_block[i] = m_block_list[output_block_index].value(); m_raw_inode.i_block[i] = m_block_list[output_block_index].value();
++output_block_index; ++output_block_index;
@ -879,23 +879,23 @@ ssize_t Ext2FSInode::read_bytes(off_t offset, ssize_t count, UserOrKernelBuffer&
const int block_size = fs().block_size(); const int block_size = fs().block_size();
size_t first_block_logical_index = offset / block_size; BlockBasedFS::BlockIndex first_block_logical_index = offset / block_size;
size_t last_block_logical_index = (offset + count) / block_size; BlockBasedFS::BlockIndex last_block_logical_index = (offset + count) / block_size;
if (last_block_logical_index >= m_block_list.size()) if (last_block_logical_index >= m_block_list.size())
last_block_logical_index = m_block_list.size() - 1; last_block_logical_index = m_block_list.size() - 1;
int offset_into_first_block = offset % block_size; int offset_into_first_block = offset % block_size;
ssize_t nread = 0; ssize_t nread = 0;
size_t remaining_count = min((off_t)count, (off_t)size() - offset); auto remaining_count = min((off_t)count, (off_t)size() - offset);
dbgln_if(EXT2_VERY_DEBUG, "Ext2FSInode[{}]::read_bytes(): Reading up to {} bytes, {} bytes into inode to {}", identifier(), count, offset, buffer.user_or_kernel_ptr()); dbgln_if(EXT2_VERY_DEBUG, "Ext2FSInode[{}]::read_bytes(): Reading up to {} bytes, {} bytes into inode to {}", identifier(), count, offset, buffer.user_or_kernel_ptr());
for (size_t bi = first_block_logical_index; remaining_count && bi <= last_block_logical_index; ++bi) { for (auto bi = first_block_logical_index; remaining_count && bi <= last_block_logical_index; bi = bi.value() + 1) {
auto block_index = m_block_list[bi]; auto block_index = m_block_list[bi.value()];
VERIFY(block_index.value()); VERIFY(block_index.value());
size_t offset_into_block = (bi == first_block_logical_index) ? offset_into_first_block : 0; size_t offset_into_block = (bi == first_block_logical_index) ? offset_into_first_block : 0;
size_t num_bytes_to_copy = min(block_size - offset_into_block, remaining_count); size_t num_bytes_to_copy = min((off_t)block_size - offset_into_block, remaining_count);
auto buffer_offset = buffer.offset(nread); auto buffer_offset = buffer.offset(nread);
int err = fs().read_block(block_index, &buffer_offset, num_bytes_to_copy, offset_into_block, allow_cache); int err = fs().read_block(block_index, &buffer_offset, num_bytes_to_copy, offset_into_block, allow_cache);
if (err < 0) { if (err < 0) {
@ -911,7 +911,7 @@ ssize_t Ext2FSInode::read_bytes(off_t offset, ssize_t count, UserOrKernelBuffer&
KResult Ext2FSInode::resize(u64 new_size) KResult Ext2FSInode::resize(u64 new_size)
{ {
u64 old_size = size(); auto old_size = size();
if (old_size == new_size) if (old_size == new_size)
return KSuccess; return KSuccess;
@ -919,8 +919,8 @@ KResult Ext2FSInode::resize(u64 new_size)
return ENOSPC; return ENOSPC;
u64 block_size = fs().block_size(); u64 block_size = fs().block_size();
size_t blocks_needed_before = ceil_div(old_size, block_size); auto blocks_needed_before = ceil_div(old_size, block_size);
size_t blocks_needed_after = ceil_div(new_size, block_size); auto blocks_needed_after = ceil_div(new_size, block_size);
if constexpr (EXT2_DEBUG) { if constexpr (EXT2_DEBUG) {
dbgln("Ext2FSInode[{}]::resize(): Blocks needed before (size was {}): {}", identifier(), old_size, blocks_needed_before); dbgln("Ext2FSInode[{}]::resize(): Blocks needed before (size was {}): {}", identifier(), old_size, blocks_needed_before);
@ -928,7 +928,7 @@ KResult Ext2FSInode::resize(u64 new_size)
} }
if (blocks_needed_after > blocks_needed_before) { if (blocks_needed_after > blocks_needed_before) {
u32 additional_blocks_needed = blocks_needed_after - blocks_needed_before; auto additional_blocks_needed = blocks_needed_after - blocks_needed_before;
if (additional_blocks_needed > fs().super_block().s_free_blocks_count) if (additional_blocks_needed > fs().super_block().s_free_blocks_count)
return ENOSPC; return ENOSPC;
} }
@ -973,11 +973,11 @@ KResult Ext2FSInode::resize(u64 new_size)
if (new_size > old_size) { if (new_size > old_size) {
// If we're growing the inode, make sure we zero out all the new space. // If we're growing the inode, make sure we zero out all the new space.
// FIXME: There are definitely more efficient ways to achieve this. // FIXME: There are definitely more efficient ways to achieve this.
size_t bytes_to_clear = new_size - old_size; auto bytes_to_clear = new_size - old_size;
size_t clear_from = old_size; auto clear_from = old_size;
u8 zero_buffer[PAGE_SIZE] {}; u8 zero_buffer[PAGE_SIZE] {};
while (bytes_to_clear) { while (bytes_to_clear) {
auto nwritten = write_bytes(clear_from, min(sizeof(zero_buffer), bytes_to_clear), UserOrKernelBuffer::for_kernel_buffer(zero_buffer), nullptr); auto nwritten = write_bytes(clear_from, min(static_cast<u64>(sizeof(zero_buffer)), bytes_to_clear), UserOrKernelBuffer::for_kernel_buffer(zero_buffer), nullptr);
if (nwritten < 0) if (nwritten < 0)
return KResult((ErrnoCode)-nwritten); return KResult((ErrnoCode)-nwritten);
VERIFY(nwritten != 0); VERIFY(nwritten != 0);
@ -1015,8 +1015,8 @@ ssize_t Ext2FSInode::write_bytes(off_t offset, ssize_t count, const UserOrKernel
bool allow_cache = !description || !description->is_direct(); bool allow_cache = !description || !description->is_direct();
const size_t block_size = fs().block_size(); const auto block_size = fs().block_size();
u64 new_size = max(static_cast<u64>(offset) + count, size()); auto new_size = max(static_cast<u64>(offset) + count, size());
auto resize_result = resize(new_size); auto resize_result = resize(new_size);
if (resize_result.is_error()) if (resize_result.is_error())
@ -1030,25 +1030,25 @@ ssize_t Ext2FSInode::write_bytes(off_t offset, ssize_t count, const UserOrKernel
return -EIO; return -EIO;
} }
size_t first_block_logical_index = offset / block_size; BlockBasedFS::BlockIndex first_block_logical_index = offset / block_size;
size_t last_block_logical_index = (offset + count) / block_size; BlockBasedFS::BlockIndex last_block_logical_index = (offset + count) / block_size;
if (last_block_logical_index >= m_block_list.size()) if (last_block_logical_index >= m_block_list.size())
last_block_logical_index = m_block_list.size() - 1; last_block_logical_index = m_block_list.size() - 1;
size_t offset_into_first_block = offset % block_size; size_t offset_into_first_block = offset % block_size;
ssize_t nwritten = 0; ssize_t nwritten = 0;
size_t remaining_count = min((off_t)count, (off_t)new_size - offset); auto remaining_count = min((off_t)count, (off_t)new_size - offset);
dbgln_if(EXT2_VERY_DEBUG, "Ext2FSInode[{}]::write_bytes(): Writing {} bytes, {} bytes into inode from {}", identifier(), count, offset, data.user_or_kernel_ptr()); dbgln_if(EXT2_VERY_DEBUG, "Ext2FSInode[{}]::write_bytes(): Writing {} bytes, {} bytes into inode from {}", identifier(), count, offset, data.user_or_kernel_ptr());
for (size_t bi = first_block_logical_index; remaining_count && bi <= last_block_logical_index; ++bi) { for (auto bi = first_block_logical_index; remaining_count && bi <= last_block_logical_index; bi = bi.value() + 1) {
size_t offset_into_block = (bi == first_block_logical_index) ? offset_into_first_block : 0; size_t offset_into_block = (bi == first_block_logical_index) ? offset_into_first_block : 0;
size_t num_bytes_to_copy = min(block_size - offset_into_block, remaining_count); size_t num_bytes_to_copy = min((off_t)block_size - offset_into_block, remaining_count);
dbgln_if(EXT2_DEBUG, "Ext2FSInode[{}]::write_bytes(): Writing block {} (offset_into_block: {})", identifier(), m_block_list[bi], offset_into_block); dbgln_if(EXT2_DEBUG, "Ext2FSInode[{}]::write_bytes(): Writing block {} (offset_into_block: {})", identifier(), m_block_list[bi.value()], offset_into_block);
result = fs().write_block(m_block_list[bi], data.offset(nwritten), num_bytes_to_copy, offset_into_block, allow_cache); result = fs().write_block(m_block_list[bi.value()], data.offset(nwritten), num_bytes_to_copy, offset_into_block, allow_cache);
if (result.is_error()) { if (result.is_error()) {
dbgln("Ext2FSInode[{}]::write_bytes(): Failed to write block {} (index {})", identifier(), m_block_list[bi], bi); dbgln("Ext2FSInode[{}]::write_bytes(): Failed to write block {} (index {})", identifier(), m_block_list[bi.value()], bi);
return result; return result;
} }
remaining_count -= num_bytes_to_copy; remaining_count -= num_bytes_to_copy;