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AK+Kernel: OOM-harden most parts of Trie

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The only part of Unveil that can't handle OOM gracefully is the
String::formatted() use in the node metadata.
This commit is contained in:
Ali Mohammad Pur 2022-02-14 16:49:53 +03:30 • committed by Idan Horowitz
parent 80e6198563
commit a1cb2c371a
9 changed files with 145 additions and 99 deletions
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24
Kernel/FileSystem/UnveilNode.h
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@ -24,9 +24,29 @@ enum UnveilAccess {
struct UnveilNode;
struct UnveilMetadata {
String full_path;
NonnullOwnPtr<KString> full_path;
UnveilAccess permissions { None };
bool explicitly_unveiled { false };
UnveilMetadata(UnveilMetadata const&) = delete;
UnveilMetadata(UnveilMetadata&&) = default;
// Note: Intentionally not explicit.
UnveilMetadata(NonnullOwnPtr<KString>&& full_path, UnveilAccess permissions = None, bool explicitly_unveiled = false)
: full_path(move(full_path))
, permissions(permissions)
, explicitly_unveiled(explicitly_unveiled)
{
}
ErrorOr<UnveilMetadata> copy() const
{
return UnveilMetadata {
TRY(full_path->try_clone()),
permissions,
explicitly_unveiled,
};
}
};
struct UnveilNode final : public Trie<String, UnveilMetadata, Traits<String>, UnveilNode> {
@ -34,7 +54,7 @@ struct UnveilNode final : public Trie<String, UnveilMetadata, Traits<String>, Un
bool was_explicitly_unveiled() const { return this->metadata_value().explicitly_unveiled; }
UnveilAccess permissions() const { return this->metadata_value().permissions; }
const String& path() const { return this->metadata_value().full_path; }
StringView path() const { return this->metadata_value().full_path->view(); }
};
}