4566c2d811
At the moment, the actual flags are ignored, but we correctly propagate them all the way from the original mount() syscall to each custody that resides on the mounted FS.
85 lines
2.3 KiB
C++
85 lines
2.3 KiB
C++
#include <AK/HashTable.h>
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#include <AK/StringBuilder.h>
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#include <Kernel/FileSystem/Custody.h>
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#include <Kernel/FileSystem/Inode.h>
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#include <Kernel/Lock.h>
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static Lockable<InlineLinkedList<Custody>>& all_custodies()
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{
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static Lockable<InlineLinkedList<Custody>>* list;
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if (!list)
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list = new Lockable<InlineLinkedList<Custody>>;
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return *list;
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}
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Custody* Custody::get_if_cached(Custody* parent, const StringView& name)
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{
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LOCKER(all_custodies().lock());
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for (auto& custody : all_custodies().resource()) {
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if (custody.is_deleted())
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continue;
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if (custody.is_mounted_on())
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continue;
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if (custody.parent() == parent && custody.name() == name)
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return &custody;
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}
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return nullptr;
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}
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NonnullRefPtr<Custody> Custody::get_or_create(Custody* parent, const StringView& name, Inode& inode, int mount_flags)
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{
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if (RefPtr<Custody> cached_custody = get_if_cached(parent, name)) {
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if (&cached_custody->inode() != &inode) {
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dbg() << "WTF! Cached custody for name '" << name << "' has inode=" << cached_custody->inode().identifier() << ", new inode=" << inode.identifier();
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}
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ASSERT(&cached_custody->inode() == &inode);
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return *cached_custody;
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}
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return create(parent, name, inode, mount_flags);
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}
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Custody::Custody(Custody* parent, const StringView& name, Inode& inode, int mount_flags)
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: m_parent(parent)
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, m_name(name)
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, m_inode(inode)
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, m_mount_flags(mount_flags)
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{
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LOCKER(all_custodies().lock());
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all_custodies().resource().append(this);
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}
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Custody::~Custody()
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{
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LOCKER(all_custodies().lock());
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all_custodies().resource().remove(this);
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}
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String Custody::absolute_path() const
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{
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if (!parent())
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return "/";
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Vector<const Custody*, 32> custody_chain;
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for (auto* custody = this; custody; custody = custody->parent())
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custody_chain.append(custody);
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StringBuilder builder;
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for (int i = custody_chain.size() - 2; i >= 0; --i) {
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builder.append('/');
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builder.append(custody_chain[i]->name().characters());
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}
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return builder.to_string();
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}
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void Custody::did_delete(Badge<VFS>)
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{
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m_deleted = true;
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}
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void Custody::did_mount_on(Badge<VFS>)
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{
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m_mounted_on = true;
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}
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void Custody::did_rename(Badge<VFS>, const String& name)
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{
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m_name = name;
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}
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