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Add CoreInode::reverse_lookup().

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Getting the absolute path of an ext2fs inode now uses the lookup cache
which makes it a lot faster.
This commit is contained in:
Andreas Kling 2018-11-15 17:04:55 +01:00
parent 5f434bc00b
commit eced5f11e3
Notes: sideshowbarker 2024-07-19 16:10:30 +09:00
7 changed files with 61 additions and 74 deletions
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37
VirtualFileSystem/SyntheticFileSystem.cpp
View file

@ -131,33 +131,6 @@ InodeIdentifier SyntheticFileSystem::rootInode() const
return { id(), 1 };
}
bool SyntheticFileSystem::enumerateDirectoryInode(InodeIdentifier inode, Function<bool(const DirectoryEntry&)> callback) const
{
InterruptDisabler disabler;
ASSERT(inode.fsid() == id());
#ifdef SYNTHFS_DEBUG
kprintf("synthfs: enumerateDirectoryInode %u\n", inode.index());
#endif
auto it = m_inodes.find(inode.index());
if (it == m_inodes.end()) {
kprintf("SynthFS: enumerateDirectoryInode with invalid inode %u\n", inode.index());
return false;
}
const auto& synthfs_inode = *(*it).value;
if (!synthfs_inode.m_metadata.isDirectory()) {
kprintf("SynthFS: enumerateDirectoryInode with non-directory inode %u\n", inode.index());
return false;
}
callback({ ".", 1, synthfs_inode.m_metadata.inode, 2 });
callback({ "..", 2, synthfs_inode.m_parent, 2 });
for (auto& child : synthfs_inode.m_children)
callback({ child->m_name.characters(), child->m_name.length(), child->m_metadata.inode, child->m_metadata.isDirectory() ? (byte)2 : (byte)1 });
return true;
}
InodeMetadata SyntheticFileSystem::inodeMetadata(InodeIdentifier inode) const
{
InterruptDisabler disabler;
@ -334,3 +307,13 @@ InodeIdentifier SynthFSInode::lookup(const String& name)
}
return { };
}
String SynthFSInode::reverse_lookup(InodeIdentifier child_id)
{
ASSERT(is_directory());
for (auto& child : m_children) {
if (child->identifier() == child_id)
return child->m_name;
}
return { };
}