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7c87891c06
Instead of copying a Vector everytime we need to enumerate a Process' file descriptions, we can just temporarily lock so it won't change.
97 lines
2.7 KiB
C++
97 lines
2.7 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/FileDescription.h>
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#include <Kernel/FileSystem/VirtualFileSystem.h>
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#include <Kernel/Process.h>
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namespace Kernel {
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KResultOr<FlatPtr> Process::do_statvfs(String path, statvfs* buf)
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{
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auto custody_or_error = VFS::the().resolve_path(path, current_directory(), nullptr, 0);
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if (custody_or_error.is_error())
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return custody_or_error.error();
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auto& custody = custody_or_error.value();
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auto& inode = custody->inode();
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auto& fs = inode.fs();
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statvfs kernelbuf = {};
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kernelbuf.f_bsize = static_cast<u64>(fs.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 = 0; // FIXME: Implement "Filesystem ID" into Filesystem
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kernelbuf.f_namemax = 255;
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Custody* current_custody = custody;
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while (current_custody) {
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VFS::the().for_each_mount([&kernelbuf, ¤t_custody](auto& mount) {
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if (current_custody) {
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if (¤t_custody->inode() == &mount.guest()) {
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int mountflags = mount.flags();
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int flags = 0;
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if (mountflags & MS_RDONLY)
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flags = flags | ST_RDONLY;
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if (mountflags & MS_NOSUID)
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flags = flags | ST_NOSUID;
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kernelbuf.f_flag = flags;
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current_custody = nullptr;
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}
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}
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});
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if (current_custody) {
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current_custody = current_custody->parent();
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}
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}
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if (!copy_to_user(buf, &kernelbuf))
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return EFAULT;
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return 0;
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}
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KResultOr<FlatPtr> Process::sys$statvfs(Userspace<const Syscall::SC_statvfs_params*> user_params)
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{
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REQUIRE_PROMISE(rpath);
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Syscall::SC_statvfs_params params;
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if (!copy_from_user(¶ms, user_params))
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return EFAULT;
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auto path = get_syscall_path_argument(params.path);
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if (path.is_error())
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return path.error();
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return do_statvfs(path.value()->view(), params.buf);
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}
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KResultOr<FlatPtr> Process::sys$fstatvfs(int fd, statvfs* buf)
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{
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REQUIRE_PROMISE(stdio);
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auto description = fds().file_description(fd);
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if (!description)
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return EBADF;
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return do_statvfs(description->absolute_path(), buf);
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}
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}
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