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Kernel/FATFS: Implement add_child

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Undefine 2024-01-18 21:04:03 +01:00 • committed by Tim Schumacher
commit 3b39a2f71b
Notes: sideshowbarker 2024-07-18 03:20:18 +09:00
1 changed files with 33 additions and 2 deletions
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35
Kernel/FileSystem/FATFS/Inode.cpp
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@ -568,9 +568,40 @@ ErrorOr<NonnullRefPtr<Inode>> FATInode::create_child(StringView name, mode_t mod
return TRY(FATInode::create(fs(), entry, entries[lfn_entries.size()], lfn_entries));
}
ErrorOr<void> FATInode::add_child(Inode&, StringView, mode_t)
ErrorOr<void> FATInode::add_child(Inode& inode, StringView name, mode_t mode)
{
return EROFS;
VERIFY(has_flag(m_entry.attributes, FATAttributes::Directory));
VERIFY(inode.fsid() == fsid());
// FIXME: There's a lot of similar code between this function and create_child, we should try to factor out some of the common code.
dbgln_if(FAT_DEBUG, "FATInode[{}]::add_child(): appending inode {} as \"{}\"", identifier(), inode.identifier(), name);
auto entry = bit_cast<FATInode*>(&inode)->m_entry;
create_83_filename_for(entry, name);
// TODO: We should set the hidden attribute if the file starts with a dot or read only (the same way Linux does this).
if (mode & S_IFDIR)
entry.attributes |= FATAttributes::Directory;
// FIXME: Set the dates
// FIXME: For some filenames lfn entries are not necessary
auto lfn_entries = TRY(create_lfn_entries(name, lfn_entry_checksum(entry)));
MutexLocker locker(m_inode_lock);
auto entries = TRY(allocate_entries(lfn_entries.size() + 1));
// FIXME: If we fail here we should clean up the entries we wrote
TRY(fs().write_block(entries[lfn_entries.size()].block, UserOrKernelBuffer::for_kernel_buffer(bit_cast<u8*>(&entry)), sizeof(FATEntry), entries[lfn_entries.size()].entry * sizeof(FATEntry)));
for (u32 i = 0; i < lfn_entries.size(); i++) {
auto location = entries[lfn_entries.size() - i - 1];
TRY(fs().write_block(location.block, UserOrKernelBuffer::for_kernel_buffer(bit_cast<u8*>(&lfn_entries[i])), sizeof(FATLongFileNameEntry), location.entry * sizeof(FATLongFileNameEntry)));
}
return {};
}
ErrorOr<void> FATInode::remove_child(StringView)