mirror of
https://github.com/RGBCube/serenity
synced 2025-06-24 12:32:11 +00:00
bda0c935c2
This patch adds most of the plumbing for working file deletion in Ext2FS. Directory entries are removed and inode link counts updated. We don't yet update the inode or block bitmaps, I will do that separately.
103 lines
2.9 KiB
C++
103 lines
2.9 KiB
C++
#pragma once
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#include <AK/HashMap.h>
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#include <AK/OwnPtr.h>
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#include <AK/RetainPtr.h>
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#include <AK/AKString.h>
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#include <AK/Vector.h>
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#include <AK/Function.h>
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#include "InodeIdentifier.h"
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#include "InodeMetadata.h"
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#include "Limits.h"
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#include "FileSystem.h"
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#define O_RDONLY 0
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#define O_WRONLY 1
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#define O_RDWR 2
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#define O_CREAT 0100
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#define O_EXCL 0200
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#define O_NOCTTY 0400
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#define O_TRUNC 01000
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#define O_APPEND 02000
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#define O_NONBLOCK 04000
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#define O_DIRECTORY 00200000
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#define O_NOFOLLOW 00400000
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#define O_CLOEXEC 02000000
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#define O_NOFOLLOW_NOERROR 0x4000000
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class CharacterDevice;
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class FileDescriptor;
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inline constexpr dword encodedDevice(unsigned major, unsigned minor)
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{
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return (minor & 0xff) | (major << 8) | ((minor & ~0xff) << 12);
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}
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class VFS;
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class VFS {
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AK_MAKE_ETERNAL
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public:
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static void initialize_globals();
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class Mount {
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public:
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Mount(InodeIdentifier host, RetainPtr<FS>&&);
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InodeIdentifier host() const { return m_host; }
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InodeIdentifier guest() const { return m_guest; }
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const FS& guest_fs() const { return *m_guest_fs; }
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private:
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InodeIdentifier m_host;
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InodeIdentifier m_guest;
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RetainPtr<FS> m_guest_fs;
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};
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static VFS& the() PURE;
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VFS();
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~VFS();
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bool mount_root(RetainPtr<FS>&&);
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bool mount(RetainPtr<FS>&&, const String& path);
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RetainPtr<FileDescriptor> open(RetainPtr<CharacterDevice>&&, int& error, int options);
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RetainPtr<FileDescriptor> open(const String& path, int& error, int options, mode_t mode, InodeIdentifier base = InodeIdentifier());
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RetainPtr<FileDescriptor> create(const String& path, int& error, int options, mode_t mode, InodeIdentifier base);
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bool mkdir(const String& path, mode_t mode, InodeIdentifier base, int& error);
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bool unlink(const String& path, Inode& base, int& error);
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void register_character_device(CharacterDevice&);
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size_t mount_count() const { return m_mounts.size(); }
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void for_each_mount(Function<void(const Mount&)>) const;
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String absolute_path(Inode&);
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InodeIdentifier root_inode_id() const;
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Inode* root_inode() { return m_root_inode.ptr(); }
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const Inode* root_inode() const { return m_root_inode.ptr(); }
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void sync();
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private:
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friend class FileDescriptor;
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RetainPtr<Inode> get_inode(InodeIdentifier);
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bool is_vfs_root(InodeIdentifier) const;
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void traverse_directory_inode(Inode&, Function<bool(const FS::DirectoryEntry&)>);
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InodeIdentifier resolve_path(const String& path, InodeIdentifier base, int& error, int options = 0, InodeIdentifier* deepest_dir = nullptr);
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InodeIdentifier resolve_symbolic_link(InodeIdentifier base, Inode& symlink_inode, int& error);
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Mount* find_mount_for_host(InodeIdentifier);
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Mount* find_mount_for_guest(InodeIdentifier);
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RetainPtr<Inode> m_root_inode;
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Vector<OwnPtr<Mount>> m_mounts;
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HashMap<dword, CharacterDevice*> m_character_devices;
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};
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