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Kernel/FileSystem: Avoid double locking m_inode_lock in the Ext2 driver

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Liav A 2024-02-23 17:18:25 +02:00 • committed by Andrew Kaster
parent b63a1dda63
commit fff49ab6d3
3 changed files with 11 additions and 2 deletions
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5
Kernel/FileSystem/Ext2FS/Inode.cpp
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@ -594,6 +594,7 @@ ErrorOr<size_t> Ext2FSInode::read_bytes_locked(off_t offset, size_t count, UserO
ErrorOr<void> Ext2FSInode::resize(u64 new_size)
{
VERIFY(m_inode_lock.is_locked());
auto old_size = size();
if (old_size == new_size)
return {};
@ -655,7 +656,7 @@ ErrorOr<void> Ext2FSInode::resize(u64 new_size)
auto clear_from = old_size;
u8 zero_buffer[PAGE_SIZE] {};
while (bytes_to_clear) {
auto nwritten = TRY(write_bytes(clear_from, min(static_cast<u64>(sizeof(zero_buffer)), bytes_to_clear), UserOrKernelBuffer::for_kernel_buffer(zero_buffer), nullptr));
auto nwritten = TRY(prepare_and_write_bytes_locked(clear_from, min(static_cast<u64>(sizeof(zero_buffer)), bytes_to_clear), UserOrKernelBuffer::for_kernel_buffer(zero_buffer), nullptr));
VERIFY(nwritten != 0);
bytes_to_clear -= nwritten;
clear_from += nwritten;
@ -816,7 +817,7 @@ ErrorOr<void> Ext2FSInode::write_directory(Vector<Ext2FSDirectoryEntry>& entries
TRY(resize(serialized_bytes_count));
auto buffer = UserOrKernelBuffer::for_kernel_buffer(directory_data.data());
auto nwritten = TRY(write_bytes(0, serialized_bytes_count, buffer, nullptr));
auto nwritten = TRY(prepare_and_write_bytes_locked(0, serialized_bytes_count, buffer, nullptr));
set_metadata_dirty(true);
if (nwritten != directory_data.size())
return EIO;