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Kernel: Use u64 instead of u32 and u16 in StorageDevice::{read, write}

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This ensures offsets will not be truncated on large filesystems on i686
This commit is contained in:
Idan Horowitz 2022-01-25 20:27:35 +02:00
parent b9cce82cf3
commit d1ed554dc8
1 changed files with 7 additions and 7 deletions
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14
Kernel/Storage/StorageDevice.cpp
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@ -28,11 +28,11 @@ StringView StorageDevice::class_name() const
ErrorOr<size_t> StorageDevice::read(OpenFileDescription&, u64 offset, UserOrKernelBuffer& outbuf, size_t len) ErrorOr<size_t> StorageDevice::read(OpenFileDescription&, u64 offset, UserOrKernelBuffer& outbuf, size_t len)
{ {
unsigned index = offset / block_size(); u64 index = offset / block_size();
u16 whole_blocks = len / block_size(); size_t whole_blocks = len / block_size();
size_t remaining = len % block_size(); size_t remaining = len % block_size();
unsigned blocks_per_page = PAGE_SIZE / block_size(); size_t blocks_per_page = PAGE_SIZE / block_size();
// PATAChannel will chuck a wobbly if we try to read more than PAGE_SIZE // PATAChannel will chuck a wobbly if we try to read more than PAGE_SIZE
// at a time, because it uses a single page for its DMA buffer. // at a time, because it uses a single page for its DMA buffer.
@ -85,18 +85,18 @@ ErrorOr<size_t> StorageDevice::read(OpenFileDescription&, u64 offset, UserOrKern
return pos + remaining; return pos + remaining;
} }
bool StorageDevice::can_read(const OpenFileDescription&, size_t offset) const bool StorageDevice::can_read(const OpenFileDescription&, u64 offset) const
{ {
return offset < (max_addressable_block() * block_size()); return offset < (max_addressable_block() * block_size());
} }
ErrorOr<size_t> StorageDevice::write(OpenFileDescription&, u64 offset, const UserOrKernelBuffer& inbuf, size_t len) ErrorOr<size_t> StorageDevice::write(OpenFileDescription&, u64 offset, const UserOrKernelBuffer& inbuf, size_t len)
{ {
unsigned index = offset / block_size(); u64 index = offset / block_size();
u16 whole_blocks = len / block_size(); size_t whole_blocks = len / block_size();
size_t remaining = len % block_size(); size_t remaining = len % block_size();
unsigned blocks_per_page = PAGE_SIZE / block_size(); size_t blocks_per_page = PAGE_SIZE / block_size();
// PATAChannel will chuck a wobbly if we try to write more than PAGE_SIZE // PATAChannel will chuck a wobbly if we try to write more than PAGE_SIZE
// at a time, because it uses a single page for its DMA buffer. // at a time, because it uses a single page for its DMA buffer.