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Kernel: Move TmpFS towards OOM safety

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This commit is contained in:
Brian Gianforcaro 2021-05-28 05:41:05 -07:00 • committed by Linus Groh
parent 8f9872581b
commit 23c021912e
2 changed files with 15 additions and 12 deletions
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21
Kernel/FileSystem/TmpFS.cpp
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@ -11,9 +11,9 @@
namespace Kernel {
NonnullRefPtr<TmpFS> TmpFS::create()
RefPtr<TmpFS> TmpFS::create()
{
return adopt_ref(*new TmpFS);
return adopt_ref_if_nonnull(new TmpFS);
}
TmpFS::TmpFS()
@ -27,7 +27,7 @@ TmpFS::~TmpFS()
bool TmpFS::initialize()
{
m_root_inode = TmpFSInode::create_root(*this);
return true;
return !m_root_inode.is_null();
}
NonnullRefPtr<Inode> TmpFS::root_inode() const
@ -84,14 +84,15 @@ TmpFSInode::~TmpFSInode()
{
}
NonnullRefPtr<TmpFSInode> TmpFSInode::create(TmpFS& fs, InodeMetadata metadata, InodeIdentifier parent)
RefPtr<TmpFSInode> TmpFSInode::create(TmpFS& fs, InodeMetadata metadata, InodeIdentifier parent)
{
auto inode = adopt_ref(*new TmpFSInode(fs, metadata, parent));
fs.register_inode(inode);
auto inode = adopt_ref_if_nonnull(new TmpFSInode(fs, metadata, parent));
if (inode)
fs.register_inode(*inode);
return inode;
}
NonnullRefPtr<TmpFSInode> TmpFSInode::create_root(TmpFS& fs)
RefPtr<TmpFSInode> TmpFSInode::create_root(TmpFS& fs)
{
InodeMetadata metadata;
auto now = kgettimeofday().to_truncated_seconds();
@ -270,10 +271,12 @@ KResultOr<NonnullRefPtr<Inode>> TmpFSInode::create_child(const String& name, mod
metadata.mtime = now;
auto child = TmpFSInode::create(fs(), metadata, identifier());
auto result = add_child(child, name, mode);
if (!child)
return ENOMEM;
auto result = add_child(*child, name, mode);
if (result.is_error())
return result;
return child;
return child.release_nonnull();
}
KResult TmpFSInode::add_child(Inode& child, const StringView& name, mode_t)