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https://github.com/SerenityOS/serenity.git
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3692af528e
There's no point in constructing an object just for the sake of keeping a state that can be touched by anything in the kernel code. Let's reduce everything to be in a C++ namespace called with the previous name "VirtualFileSystem" and keep a smaller textual-footprint struct called "VirtualFileSystemDetails". This change also cleans up old "friend class" statements that were no longer needed, and move methods from the VirtualFileSystem code to more appropriate places as well. Please note that the method of locking all filesystems during shutdown is removed, as in that place there's no meaning to actually locking all filesystems because of running in kernel mode entirely.
81 lines
2.4 KiB
C++
81 lines
2.4 KiB
C++
/*
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* Copyright (c) 2022, Ariel Don <ariel@arieldon.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Assertions.h>
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#include <AK/StringView.h>
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#include <Kernel/FileSystem/VirtualFileSystem.h>
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#include <Kernel/Library/KLexicalPath.h>
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#include <Kernel/Tasks/Process.h>
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namespace Kernel {
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ErrorOr<FlatPtr> Process::sys$futimens(Userspace<Syscall::SC_futimens_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::fattr));
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auto params = TRY(copy_typed_from_user(user_params));
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auto now = kgettimeofday().to_timespec();
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timespec times[2];
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if (params.times) {
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TRY(copy_from_user(times, params.times, sizeof(times)));
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if (times[0].tv_nsec == UTIME_NOW)
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times[0] = now;
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if (times[1].tv_nsec == UTIME_NOW)
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times[1] = now;
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} else {
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// According to POSIX, both access and modification times are set to
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// the current time given a nullptr.
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times[0] = now;
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times[1] = now;
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}
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auto description = TRY(open_file_description(params.fd));
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if (!description->inode())
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return EBADF;
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if (!description->custody())
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return EBADF;
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auto& atime = times[0];
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auto& mtime = times[1];
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TRY(VirtualFileSystem::do_utimens(credentials(), *description->custody(), atime, mtime));
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return 0;
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}
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ErrorOr<FlatPtr> Process::sys$utimensat(Userspace<Syscall::SC_utimensat_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::fattr));
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auto params = TRY(copy_typed_from_user(user_params));
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auto now = kgettimeofday().to_timespec();
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int follow_symlink = params.flag & AT_SYMLINK_NOFOLLOW ? O_NOFOLLOW_NOERROR : 0;
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timespec times[2];
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if (params.times) {
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TRY(copy_from_user(times, params.times, sizeof(times)));
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if (times[0].tv_nsec == UTIME_NOW)
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times[0] = now;
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if (times[1].tv_nsec == UTIME_NOW)
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times[1] = now;
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} else {
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// According to POSIX, both access and modification times are set to
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// the current time given a nullptr.
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times[0] = now;
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times[1] = now;
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}
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auto path = TRY(get_syscall_path_argument(params.path));
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auto& atime = times[0];
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auto& mtime = times[1];
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CustodyBase base(params.dirfd, path->view());
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TRY(VirtualFileSystem::utimensat(vfs_root_context(), credentials(), path->view(), base, atime, mtime, follow_symlink));
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return 0;
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}
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}
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