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https://github.com/SerenityOS/serenity
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c8d7bcede6
Since this is the block size that file system drivers *should* set, let's name it the logical block size, just like most file systems such as ext2 already do anyways.
72 lines
2.1 KiB
C++
72 lines
2.1 KiB
C++
/*
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* Copyright (c) 2021, Justin Mietzner <sw1tchbl4d3@sw1tchbl4d3.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <Kernel/FileSystem/Custody.h>
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#include <Kernel/FileSystem/VirtualFileSystem.h>
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#include <Kernel/Tasks/Process.h>
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namespace Kernel {
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ErrorOr<FlatPtr> Process::do_statvfs(FileSystem const& fs, Custody const* custody, statvfs* buf)
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{
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statvfs kernelbuf = {};
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kernelbuf.f_bsize = static_cast<u64>(fs.logical_block_size());
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kernelbuf.f_frsize = fs.fragment_size();
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kernelbuf.f_blocks = fs.total_block_count();
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kernelbuf.f_bfree = fs.free_block_count();
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// FIXME: Implement "available blocks" into Filesystem
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kernelbuf.f_bavail = fs.free_block_count();
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kernelbuf.f_files = fs.total_inode_count();
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kernelbuf.f_ffree = fs.free_inode_count();
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kernelbuf.f_favail = fs.free_inode_count(); // FIXME: same as f_bavail
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kernelbuf.f_fsid = fs.fsid().value();
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kernelbuf.f_namemax = 255;
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(void)fs.class_name().copy_characters_to_buffer(kernelbuf.f_basetype, FSTYPSZ);
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if (custody)
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kernelbuf.f_flag = custody->mount_flags();
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TRY(copy_to_user(buf, &kernelbuf));
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return 0;
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}
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ErrorOr<FlatPtr> Process::sys$statvfs(Userspace<Syscall::SC_statvfs_params const*> user_params)
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{
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VERIFY_NO_PROCESS_BIG_LOCK(this);
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TRY(require_promise(Pledge::rpath));
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auto params = TRY(copy_typed_from_user(user_params));
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auto path = TRY(get_syscall_path_argument(params.path));
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auto custody = TRY(VirtualFileSystem::the().resolve_path(credentials(), path->view(), current_directory(), nullptr, 0));
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auto& inode = custody->inode();
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auto const& fs = inode.fs();
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return do_statvfs(fs, custody, params.buf);
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}
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ErrorOr<FlatPtr> Process::sys$fstatvfs(int fd, statvfs* buf)
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{
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VERIFY_NO_PROCESS_BIG_LOCK(this);
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TRY(require_promise(Pledge::stdio));
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auto description = TRY(open_file_description(fd));
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auto const* inode = description->inode();
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if (inode == nullptr)
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return ENOENT;
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// FIXME: The custody that we pass in might be outdated. However, this only affects the mount flags.
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return do_statvfs(inode->fs(), description->custody(), buf);
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}
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}
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