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Kernel: Start work on making inodes more thread safe

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All inode operations are now locked and thread blocked
This commit is contained in:
Bananymous
2023-09-09 22:45:27 +03:00
parent 39a5c52088
commit dd9af56e21
23 changed files with 229 additions and 105 deletions
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38
kernel/include/kernel/FS/Inode.h
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@@ -7,6 +7,7 @@
#include <kernel/API/DirectoryEntry.h>
#include <kernel/Credentials.h>
#include <kernel/SpinLock.h>
#include <sys/types.h>
#include <time.h>
@@ -80,18 +81,37 @@ namespace Kernel
virtual bool is_pipe() const { return false; }
virtual bool is_tty() const { return false; }
virtual BAN::ErrorOr<BAN::String> link_target() { ASSERT_NOT_REACHED(); }
// 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);
virtual BAN::ErrorOr<BAN::RefPtr<Inode>> directory_find_inode(BAN::StringView) { if (!mode().ifdir()) return BAN::Error::from_errno(ENOTDIR); ASSERT_NOT_REACHED(); }
virtual BAN::ErrorOr<void> directory_read_next_entries(off_t, DirectoryEntryList*, size_t) { if (!mode().ifdir()) return BAN::Error::from_errno(ENOTDIR); ASSERT_NOT_REACHED(); }
// Link API
BAN::ErrorOr<BAN::String> link_target();
virtual BAN::ErrorOr<size_t> read(size_t, void*, size_t) { if (mode().ifdir()) return BAN::Error::from_errno(EISDIR); ASSERT_NOT_REACHED(); }
virtual BAN::ErrorOr<size_t> write(size_t, const void*, size_t) { if (mode().ifdir()) return BAN::Error::from_errno(EISDIR); ASSERT_NOT_REACHED(); }
virtual bool has_data() const { dwarnln("nonblock not supported"); return true; }
virtual BAN::ErrorOr<void> truncate(size_t) { if (mode().ifdir()) return BAN::Error::from_errno(EISDIR); return BAN::Error::from_errno(ENOTSUP); }
// 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;
virtual BAN::ErrorOr<void> create_file(BAN::StringView, mode_t, uid_t, gid_t) { if (!mode().ifdir()) return BAN::Error::from_errno(ENOTDIR); ASSERT_NOT_REACHED(); }
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;
};
}