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Add basic character device support. Start with null and zero.

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This commit is contained in:
Andreas Kling 2018-10-14 02:59:22 +02:00
parent fa3b11ac64
commit 93556d6743
Notes: sideshowbarker 2024-07-19 18:48:27 +09:00
14 changed files with 157 additions and 2 deletions
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10
VirtualFileSystem/VirtualFileSystem.h
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@ -7,6 +7,7 @@
#include <AK/Vector.h>
#include "InodeIdentifier.h"
class CharacterDevice;
class FileHandle;
class FileSystem;
@ -17,6 +18,9 @@ public:
bool inUse() const { return inode.isValid(); }
bool isCharacterDevice() const { return m_characterDevice; }
CharacterDevice* characterDevice() { return m_characterDevice; }
void retain();
void release();
@ -27,6 +31,7 @@ public:
friend class VirtualFileSystem;
VirtualFileSystem* vfs { nullptr };
unsigned retainCount { 0 };
CharacterDevice* m_characterDevice { nullptr };
};
VirtualFileSystem();
@ -52,6 +57,8 @@ public:
bool touch(const String&path);
void registerCharacterDevice(unsigned major, unsigned minor, CharacterDevice&);
private:
template<typename F> void enumerateDirectoryInode(InodeIdentifier, F func);
InodeIdentifier resolvePath(const String& path);
@ -80,6 +87,7 @@ private:
Mount* findMountForGuest(InodeIdentifier);
HashMap<InodeIdentifier, Node*> m_inode2vnode;
HashMap<dword, Node*> m_device2vnode;
Vector<OwnPtr<Mount>> m_mounts;
@ -89,5 +97,7 @@ private:
Vector<Node*> m_nodeFreeList;
RetainPtr<Node> m_rootNode;
HashMap<dword, CharacterDevice*> m_characterDevices;
};