mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2025-04-25 14:05:15 +00:00
6af2418de7
VFS no longer deals with inodes in public API, only with custodies and file descriptions. Talk directly to the file system if you need to operate on a inode. In most cases you actually want to go though VFS, to get proper permission check and other niceties. For this to work, you have to provide a custody, which describes *how* you have opened the inode, not just what the inode is.
114 lines
4 KiB
C++
114 lines
4 KiB
C++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice, this
|
|
* list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <AK/StringView.h>
|
|
#include <Kernel/FileSystem/FileDescription.h>
|
|
#include <Kernel/FileSystem/Inode.h>
|
|
#include <Kernel/FileSystem/InodeFile.h>
|
|
#include <Kernel/FileSystem/VirtualFileSystem.h>
|
|
#include <Kernel/Process.h>
|
|
#include <Kernel/VM/PrivateInodeVMObject.h>
|
|
#include <Kernel/VM/SharedInodeVMObject.h>
|
|
|
|
namespace Kernel {
|
|
|
|
InodeFile::InodeFile(NonnullRefPtr<Inode>&& inode)
|
|
: m_inode(move(inode))
|
|
{
|
|
}
|
|
|
|
InodeFile::~InodeFile()
|
|
{
|
|
}
|
|
|
|
ssize_t InodeFile::read(FileDescription& description, size_t offset, u8* buffer, ssize_t count)
|
|
{
|
|
ssize_t nread = m_inode->read_bytes(offset, count, buffer, &description);
|
|
if (nread > 0)
|
|
Thread::current->did_file_read(nread);
|
|
return nread;
|
|
}
|
|
|
|
ssize_t InodeFile::write(FileDescription& description, size_t offset, const u8* data, ssize_t count)
|
|
{
|
|
ssize_t nwritten = m_inode->write_bytes(offset, count, data, &description);
|
|
if (nwritten > 0) {
|
|
m_inode->set_mtime(kgettimeofday().tv_sec);
|
|
Thread::current->did_file_write(nwritten);
|
|
}
|
|
return nwritten;
|
|
}
|
|
|
|
KResultOr<Region*> InodeFile::mmap(Process& process, FileDescription& description, VirtualAddress preferred_vaddr, size_t offset, size_t size, int prot, bool shared)
|
|
{
|
|
ASSERT(offset == 0);
|
|
// FIXME: If PROT_EXEC, check that the underlying file system isn't mounted noexec.
|
|
RefPtr<InodeVMObject> vmobject;
|
|
if (shared)
|
|
vmobject = SharedInodeVMObject::create_with_inode(inode());
|
|
else
|
|
vmobject = PrivateInodeVMObject::create_with_inode(inode());
|
|
if (!vmobject)
|
|
return KResult(-ENOMEM);
|
|
auto* region = process.allocate_region_with_vmobject(preferred_vaddr, size, *vmobject, offset, description.absolute_path(), prot);
|
|
if (!region)
|
|
return KResult(-ENOMEM);
|
|
return region;
|
|
}
|
|
|
|
String InodeFile::absolute_path(const FileDescription& description) const
|
|
{
|
|
ASSERT_NOT_REACHED();
|
|
ASSERT(description.custody());
|
|
return description.absolute_path();
|
|
}
|
|
|
|
KResult InodeFile::truncate(u64 size)
|
|
{
|
|
auto truncate_result = m_inode->truncate(size);
|
|
if (truncate_result.is_error())
|
|
return truncate_result;
|
|
int mtime_result = m_inode->set_mtime(kgettimeofday().tv_sec);
|
|
if (mtime_result != 0)
|
|
return KResult(mtime_result);
|
|
return KSuccess;
|
|
}
|
|
|
|
KResult InodeFile::chown(FileDescription& description, uid_t uid, gid_t gid)
|
|
{
|
|
ASSERT(description.inode() == m_inode);
|
|
ASSERT(description.custody());
|
|
return VFS::the().chown(*description.custody(), uid, gid);
|
|
}
|
|
|
|
KResult InodeFile::chmod(FileDescription& description, mode_t mode)
|
|
{
|
|
ASSERT(description.inode() == m_inode);
|
|
ASSERT(description.custody());
|
|
return VFS::the().chmod(*description.custody(), mode);
|
|
}
|
|
|
|
}
|