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Kernel: Make SharedInodeVMObject pages Bitmap allocation OOM-fallible

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This commit is contained in:
Idan Horowitz 2022-02-10 19:39:17 +02:00
parent 8030e2a88f
commit d9d3362722
6 changed files with 26 additions and 22 deletions
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8
Kernel/Memory/InodeVMObject.cpp
View file

@ -9,17 +9,17 @@
namespace Kernel::Memory { namespace Kernel::Memory {
InodeVMObject::InodeVMObject(Inode& inode, FixedArray<RefPtr<PhysicalPage>>&& new_physical_pages) InodeVMObject::InodeVMObject(Inode& inode, FixedArray<RefPtr<PhysicalPage>>&& new_physical_pages, Bitmap dirty_pages)
: VMObject(move(new_physical_pages)) : VMObject(move(new_physical_pages))
, m_inode(inode) , m_inode(inode)
, m_dirty_pages(Bitmap::try_create(page_count(), false).release_value_but_fixme_should_propagate_errors()) , m_dirty_pages(move(dirty_pages))
{ {
} }
InodeVMObject::InodeVMObject(InodeVMObject const& other, FixedArray<RefPtr<PhysicalPage>>&& new_physical_pages) InodeVMObject::InodeVMObject(InodeVMObject const& other, FixedArray<RefPtr<PhysicalPage>>&& new_physical_pages, Bitmap dirty_pages)
: VMObject(move(new_physical_pages)) : VMObject(move(new_physical_pages))
, m_inode(other.m_inode) , m_inode(other.m_inode)
, m_dirty_pages(Bitmap::try_create(page_count(), false).release_value_but_fixme_should_propagate_errors()) , m_dirty_pages(move(dirty_pages))
{ {
for (size_t i = 0; i < page_count(); ++i) for (size_t i = 0; i < page_count(); ++i)
m_dirty_pages.set(i, other.m_dirty_pages.get(i)); m_dirty_pages.set(i, other.m_dirty_pages.get(i));

4
Kernel/Memory/InodeVMObject.h
View file

@ -28,8 +28,8 @@ public:
u32 executable_mappings() const; u32 executable_mappings() const;
protected: protected:
explicit InodeVMObject(Inode&, FixedArray<RefPtr<PhysicalPage>>&&); explicit InodeVMObject(Inode&, FixedArray<RefPtr<PhysicalPage>>&&, Bitmap dirty_pages);
explicit InodeVMObject(InodeVMObject const&, FixedArray<RefPtr<PhysicalPage>>&&); explicit InodeVMObject(InodeVMObject const&, FixedArray<RefPtr<PhysicalPage>>&&, Bitmap dirty_pages);
InodeVMObject& operator=(InodeVMObject const&) = delete; InodeVMObject& operator=(InodeVMObject const&) = delete;
InodeVMObject& operator=(InodeVMObject&&) = delete; InodeVMObject& operator=(InodeVMObject&&) = delete;

14
Kernel/Memory/PrivateInodeVMObject.cpp
View file

@ -12,22 +12,24 @@ namespace Kernel::Memory {
ErrorOr<NonnullRefPtr<PrivateInodeVMObject>> PrivateInodeVMObject::try_create_with_inode(Inode& inode) ErrorOr<NonnullRefPtr<PrivateInodeVMObject>> PrivateInodeVMObject::try_create_with_inode(Inode& inode)
{ {
auto new_physical_pages = TRY(VMObject::try_create_physical_pages(inode.size())); auto new_physical_pages = TRY(VMObject::try_create_physical_pages(inode.size()));
return adopt_nonnull_ref_or_enomem(new (nothrow) PrivateInodeVMObject(inode, move(new_physical_pages))); auto dirty_pages = TRY(Bitmap::try_create(new_physical_pages.size(), false));
return adopt_nonnull_ref_or_enomem(new (nothrow) PrivateInodeVMObject(inode, move(new_physical_pages), move(dirty_pages)));
} }
ErrorOr<NonnullRefPtr<VMObject>> PrivateInodeVMObject::try_clone() ErrorOr<NonnullRefPtr<VMObject>> PrivateInodeVMObject::try_clone()
{ {
auto new_physical_pages = TRY(this->try_clone_physical_pages()); auto new_physical_pages = TRY(this->try_clone_physical_pages());
return adopt_nonnull_ref_or_enomem<VMObject>(new (nothrow) PrivateInodeVMObject(*this, move(new_physical_pages))); auto dirty_pages = TRY(Bitmap::try_create(new_physical_pages.size(), false));
return adopt_nonnull_ref_or_enomem<VMObject>(new (nothrow) PrivateInodeVMObject(*this, move(new_physical_pages), move(dirty_pages)));
} }
PrivateInodeVMObject::PrivateInodeVMObject(Inode& inode, FixedArray<RefPtr<PhysicalPage>>&& new_physical_pages) PrivateInodeVMObject::PrivateInodeVMObject(Inode& inode, FixedArray<RefPtr<PhysicalPage>>&& new_physical_pages, Bitmap dirty_pages)
: InodeVMObject(inode, move(new_physical_pages)) : InodeVMObject(inode, move(new_physical_pages), move(dirty_pages))
{ {
} }
PrivateInodeVMObject::PrivateInodeVMObject(PrivateInodeVMObject const& other, FixedArray<RefPtr<PhysicalPage>>&& new_physical_pages) PrivateInodeVMObject::PrivateInodeVMObject(PrivateInodeVMObject const& other, FixedArray<RefPtr<PhysicalPage>>&& new_physical_pages, Bitmap dirty_pages)
: InodeVMObject(other, move(new_physical_pages)) : InodeVMObject(other, move(new_physical_pages), move(dirty_pages))
{ {
} }

4
Kernel/Memory/PrivateInodeVMObject.h
View file

@ -23,8 +23,8 @@ public:
private: private:
virtual bool is_private_inode() const override { return true; } virtual bool is_private_inode() const override { return true; }
explicit PrivateInodeVMObject(Inode&, FixedArray<RefPtr<PhysicalPage>>&&); explicit PrivateInodeVMObject(Inode&, FixedArray<RefPtr<PhysicalPage>>&&, Bitmap dirty_pages);
explicit PrivateInodeVMObject(PrivateInodeVMObject const&, FixedArray<RefPtr<PhysicalPage>>&&); explicit PrivateInodeVMObject(PrivateInodeVMObject const&, FixedArray<RefPtr<PhysicalPage>>&&, Bitmap dirty_pages);
virtual StringView class_name() const override { return "PrivateInodeVMObject"sv; } virtual StringView class_name() const override { return "PrivateInodeVMObject"sv; }

14
Kernel/Memory/SharedInodeVMObject.cpp
View file

@ -16,7 +16,8 @@ ErrorOr<NonnullRefPtr<SharedInodeVMObject>> SharedInodeVMObject::try_create_with
if (auto shared_vmobject = inode.shared_vmobject()) if (auto shared_vmobject = inode.shared_vmobject())
return shared_vmobject.release_nonnull(); return shared_vmobject.release_nonnull();
auto new_physical_pages = TRY(VMObject::try_create_physical_pages(size)); auto new_physical_pages = TRY(VMObject::try_create_physical_pages(size));
auto vmobject = TRY(adopt_nonnull_ref_or_enomem(new (nothrow) SharedInodeVMObject(inode, move(new_physical_pages)))); auto dirty_pages = TRY(Bitmap::try_create(new_physical_pages.size(), false));
auto vmobject = TRY(adopt_nonnull_ref_or_enomem(new (nothrow) SharedInodeVMObject(inode, move(new_physical_pages), move(dirty_pages))));
vmobject->inode().set_shared_vmobject(*vmobject); vmobject->inode().set_shared_vmobject(*vmobject);
return vmobject; return vmobject;
} }
@ -24,16 +25,17 @@ ErrorOr<NonnullRefPtr<SharedInodeVMObject>> SharedInodeVMObject::try_create_with
ErrorOr<NonnullRefPtr<VMObject>> SharedInodeVMObject::try_clone() ErrorOr<NonnullRefPtr<VMObject>> SharedInodeVMObject::try_clone()
{ {
auto new_physical_pages = TRY(this->try_clone_physical_pages()); auto new_physical_pages = TRY(this->try_clone_physical_pages());
return adopt_nonnull_ref_or_enomem<VMObject>(new (nothrow) SharedInodeVMObject(*this, move(new_physical_pages))); auto dirty_pages = TRY(Bitmap::try_create(new_physical_pages.size(), false));
return adopt_nonnull_ref_or_enomem<VMObject>(new (nothrow) SharedInodeVMObject(*this, move(new_physical_pages), move(dirty_pages)));
} }
SharedInodeVMObject::SharedInodeVMObject(Inode& inode, FixedArray<RefPtr<PhysicalPage>>&& new_physical_pages) SharedInodeVMObject::SharedInodeVMObject(Inode& inode, FixedArray<RefPtr<PhysicalPage>>&& new_physical_pages, Bitmap dirty_pages)
: InodeVMObject(inode, move(new_physical_pages)) : InodeVMObject(inode, move(new_physical_pages), move(dirty_pages))
{ {
} }
SharedInodeVMObject::SharedInodeVMObject(SharedInodeVMObject const& other, FixedArray<RefPtr<PhysicalPage>>&& new_physical_pages) SharedInodeVMObject::SharedInodeVMObject(SharedInodeVMObject const& other, FixedArray<RefPtr<PhysicalPage>>&& new_physical_pages, Bitmap dirty_pages)
: InodeVMObject(other, move(new_physical_pages)) : InodeVMObject(other, move(new_physical_pages), move(dirty_pages))
{ {
} }

4
Kernel/Memory/SharedInodeVMObject.h
View file

@ -23,8 +23,8 @@ public:
private: private:
virtual bool is_shared_inode() const override { return true; } virtual bool is_shared_inode() const override { return true; }
explicit SharedInodeVMObject(Inode&, FixedArray<RefPtr<PhysicalPage>>&&); explicit SharedInodeVMObject(Inode&, FixedArray<RefPtr<PhysicalPage>>&&, Bitmap dirty_pages);
explicit SharedInodeVMObject(SharedInodeVMObject const&, FixedArray<RefPtr<PhysicalPage>>&&); explicit SharedInodeVMObject(SharedInodeVMObject const&, FixedArray<RefPtr<PhysicalPage>>&&, Bitmap dirty_pages);
virtual StringView class_name() const override { return "SharedInodeVMObject"sv; } virtual StringView class_name() const override { return "SharedInodeVMObject"sv; }