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Kernel: Make Inode::lookup() return a KResultOr<NonnullRefPtr<Inode>>

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This allows file systems to return arbitrary error codes instead of just
an Inode or not an Inode.
This commit is contained in:
Andreas Kling
2021-08-14 13:32:35 +02:00
parent 459115a59c
commit ef2720bcad
18 changed files with 83 additions and 72 deletions
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14
Kernel/FileSystem/Ext2FileSystem.cpp
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@@ -1630,12 +1630,12 @@ KResult Ext2FSInode::populate_lookup_cache() const
return KSuccess;
}
RefPtr<Inode> Ext2FSInode::lookup(StringView name)
KResultOr<NonnullRefPtr<Inode>> Ext2FSInode::lookup(StringView name)
{
VERIFY(is_directory());
dbgln_if(EXT2_DEBUG, "Ext2FSInode[{}]:lookup(): Looking up '{}'", identifier(), name);
if (populate_lookup_cache().is_error())
return {};
if (auto result = populate_lookup_cache(); result.is_error())
return result;
InodeIndex inode_index;
{
@@ -1643,11 +1643,15 @@ RefPtr<Inode> Ext2FSInode::lookup(StringView name)
auto it = m_lookup_cache.find(name.hash(), [&](auto& entry) { return entry.key == name; });
if (it == m_lookup_cache.end()) {
dbgln_if(EXT2_DEBUG, "Ext2FSInode[{}]:lookup(): '{}' not found", identifier(), name);
return {};
return ENOENT;
}
inode_index = it->value;
}
return fs().get_inode({ fsid(), inode_index });
auto inode = fs().get_inode({ fsid(), inode_index });
if (!inode)
return ENOENT;
return inode.release_nonnull();
}
void Ext2FSInode::one_ref_left()