banan-os/kernel/include/kernel/FS/Inode.h

117 lines
3.6 KiB
C++

#pragma once
#include <BAN/RefPtr.h>
#include <BAN/String.h>
#include <BAN/StringView.h>
#include <BAN/Vector.h>
#include <kernel/API/DirectoryEntry.h>
#include <kernel/Credentials.h>
#include <kernel/SpinLock.h>
#include <sys/types.h>
#include <time.h>
namespace Kernel
{
using namespace API;
class Inode : public BAN::RefCounted<Inode>
{
public:
struct Mode
{
enum Mask : mode_t
{
IXOTH = 0x0001,
IWOTH = 0x0002,
IROTH = 0x0004,
IXGRP = 0x0008,
IWGRP = 0x0010,
IRGRP = 0x0020,
IXUSR = 0x0040,
IWUSR = 0x0080,
IRUSR = 0x0100,
ISVTX = 0x0200,
ISGID = 0x0400,
ISUID = 0x0800,
IFIFO = 0x1000,
IFCHR = 0x2000,
IFDIR = 0x4000,
IFBLK = 0x6000,
IFREG = 0x8000,
IFLNK = 0xA000,
IFSOCK = 0xC000,
TYPE_MASK = 0xF000,
};
bool ifchr() const { return (mode & Mask::TYPE_MASK) == Mask::IFCHR; }
bool ifdir() const { return (mode & Mask::TYPE_MASK) == Mask::IFDIR; }
bool ifblk() const { return (mode & Mask::TYPE_MASK) == Mask::IFBLK; }
bool ifreg() const { return (mode & Mask::TYPE_MASK) == Mask::IFREG; }
bool ififo() const { return (mode & Mask::TYPE_MASK) == Mask::IFIFO; }
bool iflnk() const { return (mode & Mask::TYPE_MASK) == Mask::IFLNK; }
bool ifsock() const { return (mode & Mask::TYPE_MASK) == Mask::IFSOCK; }
mode_t mode;
};
public:
virtual ~Inode() {}
bool can_access(const Credentials&, int);
bool operator==(const Inode& other) const { return dev() == other.dev() && ino() == other.ino(); }
virtual ino_t ino() const = 0;
virtual Mode mode() const = 0;
virtual nlink_t nlink() const = 0;
virtual uid_t uid() const = 0;
virtual gid_t gid() const = 0;
virtual off_t size() const = 0;
virtual timespec atime() const = 0;
virtual timespec mtime() const = 0;
virtual timespec ctime() const = 0;
virtual blksize_t blksize() const = 0;
virtual blkcnt_t blocks() const = 0;
virtual dev_t dev() const = 0;
virtual dev_t rdev() const = 0;
virtual bool is_device() const { return false; }
virtual bool is_pipe() const { return false; }
virtual bool is_tty() const { return false; }
// Directory API
BAN::ErrorOr<BAN::RefPtr<Inode>> find_inode(BAN::StringView);
BAN::ErrorOr<void> list_next_inodes(off_t, DirectoryEntryList*, size_t);
BAN::ErrorOr<void> create_file(BAN::StringView, mode_t, uid_t, gid_t);
// Link API
BAN::ErrorOr<BAN::String> link_target();
// General API
BAN::ErrorOr<size_t> read(off_t, void*, size_t);
BAN::ErrorOr<size_t> write(off_t, const void*, size_t);
BAN::ErrorOr<void> truncate(size_t);
bool has_data() const;
protected:
// Directory API
virtual BAN::ErrorOr<BAN::RefPtr<Inode>> find_inode_impl(BAN::StringView) { return BAN::Error::from_errno(ENOTSUP); }
virtual BAN::ErrorOr<void> list_next_inodes_impl(off_t, DirectoryEntryList*, size_t) { return BAN::Error::from_errno(ENOTSUP); }
virtual BAN::ErrorOr<void> create_file_impl(BAN::StringView, mode_t, uid_t, gid_t) { return BAN::Error::from_errno(ENOTSUP); }
// Link API
virtual BAN::ErrorOr<BAN::String> link_target_impl() { return BAN::Error::from_errno(ENOTSUP); }
// General API
virtual BAN::ErrorOr<size_t> read_impl(off_t, void*, size_t) { return BAN::Error::from_errno(ENOTSUP); }
virtual BAN::ErrorOr<size_t> write_impl(off_t, const void*, size_t) { return BAN::Error::from_errno(ENOTSUP); }
virtual BAN::ErrorOr<void> truncate_impl(size_t) { return BAN::Error::from_errno(ENOTSUP); }
virtual bool has_data_impl() const { dwarnln("nonblock not supported"); return true; }
private:
mutable RecursiveSpinLock m_lock;
};
}