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Kernel: Change Ext2FS to be backed by a file instead of a block device

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In contrast to the previous patchset that was reverted, this time we use
a "special" method to access a file with block size of 512 bytes (like
a harddrive essentially).
This commit is contained in:
Liav A 2020-04-06 11:54:21 +03:00 • committed by Andreas Kling
parent 1d6c8724b9
commit ecee76b741
Notes: sideshowbarker 2024-07-19 07:51:19 +09:00
10 changed files with 104 additions and 77 deletions
Kernel/FileSystem
VirtualFileSystem.cpp

11
Kernel/FileSystem/VirtualFileSystem.cpp
View file

@ -28,7 +28,7 @@
#include <AK/StringBuilder.h>
#include <Kernel/Devices/BlockDevice.h>
#include <Kernel/FileSystem/Custody.h>
#include <Kernel/FileSystem/DiskBackedFileSystem.h>
#include <Kernel/FileSystem/FileBackedFileSystem.h>
#include <Kernel/FileSystem/FileDescription.h>
#include <Kernel/FileSystem/FileSystem.h>
#include <Kernel/FileSystem/VirtualFileSystem.h>
@ -126,14 +126,7 @@ bool VFS::mount_root(FS& file_system)
}
m_root_inode = move(root_inode);
char device_name[32];
if (m_root_inode->fs().is_disk_backed()) {
auto& device = static_cast<DiskBackedFS&>(m_root_inode->fs()).device();
sprintf(device_name, "%d,%d", device.major(), device.minor());
} else {
sprintf(device_name, "not-a-disk");
}
klog() << "VFS: mounted root on " << m_root_inode->fs().class_name() << " (" << device_name << ")";
klog() << "VFS: mounted root from " << m_root_inode->fs().class_name() << " (" << static_cast<FileBackedFS&>(m_root_inode->fs()).file_description().absolute_path() << ")";
m_mounts.append(move(mount));
return true;