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Kernel: Put Process unveil state in a SpinlockProtected container

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This makes path resolution safe to perform without holding the big lock.
This commit is contained in:
Andreas Kling 2022-03-07 21:23:08 +01:00
parent 24f02bd421
commit 580d89f093
7 changed files with 87 additions and 67 deletions
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39
Kernel/ProcessSpecificExposed.cpp
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@ -145,25 +145,28 @@ ErrorOr<void> Process::procfs_get_pledge_stats(KBufferBuilder& builder) const
ErrorOr<void> Process::procfs_get_unveil_stats(KBufferBuilder& builder) const
{
auto array = TRY(JsonArraySerializer<>::try_create(builder));
TRY(unveiled_paths().for_each_node_in_tree_order([&](auto const& unveiled_path) -> ErrorOr<IterationDecision> {
if (!unveiled_path.was_explicitly_unveiled())
TRY(m_unveil_data.with([&](auto& unveil_data) -> ErrorOr<void> {
TRY(unveil_data.paths.for_each_node_in_tree_order([&](auto const& unveiled_path) -> ErrorOr<IterationDecision> {
if (!unveiled_path.was_explicitly_unveiled())
return IterationDecision::Continue;
auto obj = TRY(array.add_object());
TRY(obj.add("path", unveiled_path.path()));
StringBuilder permissions_builder;
if (unveiled_path.permissions() & UnveilAccess::Read)
permissions_builder.append('r');
if (unveiled_path.permissions() & UnveilAccess::Write)
permissions_builder.append('w');
if (unveiled_path.permissions() & UnveilAccess::Execute)
permissions_builder.append('x');
if (unveiled_path.permissions() & UnveilAccess::CreateOrRemove)
permissions_builder.append('c');
if (unveiled_path.permissions() & UnveilAccess::Browse)
permissions_builder.append('b');
TRY(obj.add("permissions", permissions_builder.string_view()));
TRY(obj.finish());
return IterationDecision::Continue;
auto obj = TRY(array.add_object());
TRY(obj.add("path", unveiled_path.path()));
StringBuilder permissions_builder;
if (unveiled_path.permissions() & UnveilAccess::Read)
permissions_builder.append('r');
if (unveiled_path.permissions() & UnveilAccess::Write)
permissions_builder.append('w');
if (unveiled_path.permissions() & UnveilAccess::Execute)
permissions_builder.append('x');
if (unveiled_path.permissions() & UnveilAccess::CreateOrRemove)
permissions_builder.append('c');
if (unveiled_path.permissions() & UnveilAccess::Browse)
permissions_builder.append('b');
TRY(obj.add("permissions", permissions_builder.string_view()));
TRY(obj.finish());
return IterationDecision::Continue;
}));
return {};
}));
TRY(array.finish());
return {};