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Kernel: Make Inode::traverse_as_directory() callback return ErrorOr

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This allows us to propagate errors from inside the callback with TRY().
This commit is contained in:
Andreas Kling 2021-11-10 15:42:39 +01:00
parent a15ed8743d
commit 5ce753b74d
31 changed files with 154 additions and 151 deletions
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27
Kernel/ProcessSpecificExposed.cpp
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@ -41,17 +41,19 @@ ErrorOr<size_t> Process::procfs_get_thread_stack(ThreadID thread_id, KBufferBuil
return 0;
}
ErrorOr<void> Process::traverse_stacks_directory(unsigned fsid, Function<bool(FileSystem::DirectoryEntryView const&)> callback) const
ErrorOr<void> Process::traverse_stacks_directory(unsigned fsid, Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)> callback) const
{
callback({ ".", { fsid, SegmentedProcFSIndex::build_segmented_index_for_main_property(pid(), SegmentedProcFSIndex::ProcessSubDirectory::Stacks, SegmentedProcFSIndex::MainProcessProperty::Reserved) }, 0 });
callback({ "..", { fsid, m_procfs_traits->component_index() }, 0 });
TRY(callback({ ".", { fsid, SegmentedProcFSIndex::build_segmented_index_for_main_property(pid(), SegmentedProcFSIndex::ProcessSubDirectory::Stacks, SegmentedProcFSIndex::MainProcessProperty::Reserved) }, 0 }));
TRY(callback({ "..", { fsid, m_procfs_traits->component_index() }, 0 }));
for_each_thread([&](const Thread& thread) {
int tid = thread.tid().value();
InodeIdentifier identifier = { fsid, SegmentedProcFSIndex::build_segmented_index_for_thread_stack(pid(), thread.tid()) };
callback({ String::number(tid), identifier, 0 });
return thread_list().with([&](auto& list) -> ErrorOr<void> {
for (auto const& thread : list) {
int tid = thread.tid().value();
InodeIdentifier identifier = { fsid, SegmentedProcFSIndex::build_segmented_index_for_thread_stack(pid(), thread.tid()) };
TRY(callback({ String::number(tid), identifier, 0 }));
}
return {};
});
return {};
}
ErrorOr<NonnullRefPtr<Inode>> Process::lookup_stacks_directory(const ProcFS& procfs, StringView name) const
@ -87,10 +89,10 @@ ErrorOr<size_t> Process::procfs_get_file_description_link(unsigned fd, KBufferBu
return data->length();
}
ErrorOr<void> Process::traverse_file_descriptions_directory(unsigned fsid, Function<bool(FileSystem::DirectoryEntryView const&)> callback) const
ErrorOr<void> Process::traverse_file_descriptions_directory(unsigned fsid, Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)> callback) const
{
callback({ ".", { fsid, m_procfs_traits->component_index() }, 0 });
callback({ "..", { fsid, m_procfs_traits->component_index() }, 0 });
TRY(callback({ ".", { fsid, m_procfs_traits->component_index() }, 0 }));
TRY(callback({ "..", { fsid, m_procfs_traits->component_index() }, 0 }));
size_t count = 0;
fds().enumerate([&](auto& file_description_metadata) {
if (!file_description_metadata.is_valid()) {
@ -99,7 +101,8 @@ ErrorOr<void> Process::traverse_file_descriptions_directory(unsigned fsid, Funct
}
StringBuilder builder;
builder.appendff("{}", count);
callback({ builder.string_view(), { fsid, SegmentedProcFSIndex::build_segmented_index_for_file_description(pid(), count) }, DT_LNK });
// FIXME: Propagate errors from callback.
(void)callback({ builder.string_view(), { fsid, SegmentedProcFSIndex::build_segmented_index_for_file_description(pid(), count) }, DT_LNK });
count++;
});
return {};