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Add SpinLock to IDE disk access.

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This forces serialization of accesses. This driver needs to be redesigned.
This commit is contained in:
Andreas Kling 2018-10-31 21:31:56 +01:00
parent dec5683e9c
commit 8f6998c902
7 changed files with 57 additions and 13 deletions
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25
VirtualFileSystem/VirtualFileSystem.cpp
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@ -59,6 +59,8 @@ auto VirtualFileSystem::makeNode(InodeIdentifier inode) -> RetainPtr<Node>
if (!metadata.isValid())
return nullptr;
InterruptDisabler disabler;
CharacterDevice* characterDevice = nullptr;
if (metadata.isCharacterDevice()) {
auto it = m_characterDevices.find(encodedDevice(metadata.majorDevice, metadata.minorDevice));
@ -91,6 +93,7 @@ auto VirtualFileSystem::makeNode(InodeIdentifier inode) -> RetainPtr<Node>
auto VirtualFileSystem::makeNode(CharacterDevice& device) -> RetainPtr<Node>
{
InterruptDisabler disabler;
auto vnode = allocateNode();
ASSERT(vnode);
@ -106,17 +109,23 @@ auto VirtualFileSystem::makeNode(CharacterDevice& device) -> RetainPtr<Node>
auto VirtualFileSystem::getOrCreateNode(InodeIdentifier inode) -> RetainPtr<Node>
{
auto it = m_inode2vnode.find(inode);
if (it != m_inode2vnode.end())
return (*it).value;
{
InterruptDisabler disabler;
auto it = m_inode2vnode.find(inode);
if (it != m_inode2vnode.end())
return (*it).value;
}
return makeNode(inode);
}
auto VirtualFileSystem::getOrCreateNode(CharacterDevice& device) -> RetainPtr<Node>
{
auto it = m_device2vnode.find(encodedDevice(device.major(), device.minor()));
if (it != m_device2vnode.end())
return (*it).value;
{
InterruptDisabler disabler;
auto it = m_device2vnode.find(encodedDevice(device.major(), device.minor()));
if (it != m_device2vnode.end())
return (*it).value;
}
return makeNode(device);
}
@ -152,7 +161,7 @@ bool VirtualFileSystem::mountRoot(RetainPtr<FileSystem>&& fileSystem)
return false;
}
if (!node->inode.metadata().isDirectory()) {
kprintf("VFS: root inode for / is not in use :(\n");
kprintf("VFS: root inode for / is not a directory :(\n");
return false;
}
@ -168,7 +177,6 @@ bool VirtualFileSystem::mountRoot(RetainPtr<FileSystem>&& fileSystem)
auto VirtualFileSystem::allocateNode() -> RetainPtr<Node>
{
if (m_nodeFreeList.isEmpty()) {
kprintf("VFS: allocateNode has no nodes left\n");
return nullptr;
@ -182,6 +190,7 @@ auto VirtualFileSystem::allocateNode() -> RetainPtr<Node>
void VirtualFileSystem::freeNode(Node* node)
{
InterruptDisabler disabler;
ASSERT(node);
ASSERT(node->inUse());
if (node->inode.isValid()) {