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/*
* Copyright (c) 2021, Justin Mietzner <sw1tchbl4d3@sw1tchbl4d3.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <Kernel/FileSystem/Custody.h>
#include <Kernel/FileSystem/VirtualFileSystem.h>
#include <Kernel/Process.h>
namespace Kernel {
ErrorOr<FlatPtr> Process::do_statvfs(FileSystem const& fs, Custody const* custody, statvfs* buf)
{
statvfs kernelbuf = {};
kernelbuf.f_bsize = static_cast<u64>(fs.block_size());
kernelbuf.f_frsize = fs.fragment_size();
kernelbuf.f_blocks = fs.total_block_count();
kernelbuf.f_bfree = fs.free_block_count();
// FIXME: Implement "available blocks" into Filesystem
kernelbuf.f_bavail = fs.free_block_count();
kernelbuf.f_files = fs.total_inode_count();
kernelbuf.f_ffree = fs.free_inode_count();
kernelbuf.f_favail = fs.free_inode_count(); // FIXME: same as f_bavail
kernelbuf.f_fsid = fs.fsid().value();
kernelbuf.f_namemax = 255;
if (custody)
kernelbuf.f_flag = custody->mount_flags();
TRY(copy_to_user(buf, &kernelbuf));
return 0;
}
ErrorOr<FlatPtr> Process::sys$statvfs(Userspace<const Syscall::SC_statvfs_params*> user_params)
{
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
TRY(require_promise(Pledge::rpath));
auto params = TRY(copy_typed_from_user(user_params));
auto path = TRY(get_syscall_path_argument(params.path));
auto custody = TRY(VirtualFileSystem::the().resolve_path(path->view(), current_directory(), nullptr, 0));
auto& inode = custody->inode();
auto const& fs = inode.fs();
return do_statvfs(fs, custody, params.buf);
}
ErrorOr<FlatPtr> Process::sys$fstatvfs(int fd, statvfs* buf)
{
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
TRY(require_promise(Pledge::stdio));
auto description = TRY(fds().open_file_description(fd));
auto const* inode = description->inode();
if (inode == nullptr)
return ENOENT;
// FIXME: The custody that we pass in might be outdated. However, this only affects the mount flags.
return do_statvfs(inode->fs(), description->custody(), buf);
}
}
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