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Add support for removing directories.

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It's really only supported in Ext2FS since SynthFS doesn't really want you
mucking around with its files. This is pretty neat though :^)

I ran into some trouble with HashMap while working on this but opted to work
around it and leave that for a separate investigation.
This commit is contained in:
Andreas Kling 2019-01-28 04:16:01 +01:00
parent 031c62a21e
commit c95228b128
19 changed files with 185 additions and 40 deletions
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12
Kernel/Ext2FileSystem.h
View file

@ -25,9 +25,9 @@ public:
private:
// ^Inode
virtual ssize_t read_bytes(off_t, size_t, byte* buffer, FileDescriptor*) override;
virtual ssize_t read_bytes(off_t, size_t, byte* buffer, FileDescriptor*) const override;
virtual InodeMetadata metadata() const override;
virtual bool traverse_as_directory(Function<bool(const FS::DirectoryEntry&)>) override;
virtual bool traverse_as_directory(Function<bool(const FS::DirectoryEntry&)>) const override;
virtual InodeIdentifier lookup(const String& name) override;
virtual String reverse_lookup(InodeIdentifier) override;
virtual void flush_metadata() override;
@ -40,15 +40,16 @@ private:
virtual int set_mtime(time_t) override;
virtual int increment_link_count() override;
virtual int decrement_link_count() override;
virtual size_t directory_entry_count() const override;
void populate_lookup_cache();
void populate_lookup_cache() const;
Ext2FS& fs();
const Ext2FS& fs() const;
Ext2FSInode(Ext2FS&, unsigned index, const ext2_inode&);
Vector<unsigned> m_block_list;
HashMap<String, unsigned> m_lookup_cache;
mutable Vector<unsigned> m_block_list;
mutable HashMap<String, unsigned> m_lookup_cache;
ext2_inode m_raw_inode;
mutable InodeIdentifier m_parent_id;
};
@ -68,6 +69,7 @@ private:
const ext2_super_block& super_block() const;
const ext2_group_desc& group_descriptor(unsigned groupIndex) const;
void flush_block_group_descriptor_table();
unsigned first_block_of_group(unsigned groupIndex) const;
unsigned inodes_per_block() const;
unsigned inodes_per_group() const;