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Start working on a VFS implementation #22

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apio wants to merge 44 commits from oop-vfs into main
pull from: oop-vfs
merge into: apio:main
Conversation 6 Commits 44 Files Changed 75 +15 -7
4 changed files with 15 additions and 7 deletions
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Showing only changes of commit 55b430a4fd - Show all commits

2
kernel/src/fs/VFS.h
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@ -57,7 +57,7 @@ namespace VFS
virtual Result<SharedPtr<Inode>> create_file_inode() = 0;
virtual Result<SharedPtr<Inode>> create_dir_inode() = 0;
virtual Result<SharedPtr<Inode>> create_dir_inode(SharedPtr<Inode> parent) = 0;
virtual ~FileSystem() = default;
};

12
kernel/src/fs/tmpfs/FileSystem.cpp
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@ -1,5 +1,6 @@
#include "fs/tmpfs/FileSystem.h"
#include <luna/Alloc.h>
#include <luna/CString.h>
#include <luna/Ignore.h>
namespace TmpFS
@ -7,7 +8,7 @@ namespace TmpFS
Result<SharedPtr<VFS::FileSystem>> FileSystem::create()
{
SharedPtr<FileSystem> fs = TRY(adopt_shared(new (std::nothrow) FileSystem()));
SharedPtr<VFS::Inode> root = TRY(fs->create_dir_inode());
SharedPtr<VFS::Inode> root = TRY(fs->create_dir_inode({}));
fs->set_root(root);
return (SharedPtr<VFS::FileSystem>)fs;
}
@ -22,10 +23,11 @@ namespace TmpFS
return (SharedPtr<VFS::Inode>)inode;
}
Result<SharedPtr<VFS::Inode>> FileSystem::create_dir_inode()
Result<SharedPtr<VFS::Inode>> FileSystem::create_dir_inode(SharedPtr<VFS::Inode> parent)
{
SharedPtr<DirInode> inode = TRY(make_shared<DirInode>());
TRY(inode->add_entry(inode, "."));
TRY(inode->add_entry(parent ? parent : (SharedPtr<VFS::Inode>)inode, ".."));
inode->set_fs(*this, {});
inode->set_inode_number(m_next_inode_number, {});
@ -43,7 +45,7 @@ namespace TmpFS
{
for (const auto& entry : m_entries)
{
if (!strcmp(name, entry.name.chars())) return entry.inode;
if (!strcmp(name, entry.name)) return entry.inode;
}
return err(ENOENT);
@ -51,7 +53,9 @@ namespace TmpFS
Result<void> DirInode::add_entry(SharedPtr<VFS::Inode> inode, const char* name)
{
Entry entry = { inode, TRY(OwnedStringView::from_string_literal(name)) };
Entry entry;
entry.inode = inode;
strlcpy(entry.name, name, sizeof(entry.name));
TRY(m_entries.try_append(move(entry)));

4
kernel/src/fs/tmpfs/FileSystem.h
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@ -16,7 +16,7 @@ namespace TmpFS
}
Result<SharedPtr<VFS::Inode>> create_file_inode() override;
Result<SharedPtr<VFS::Inode>> create_dir_inode() override;
Result<SharedPtr<VFS::Inode>> create_dir_inode(SharedPtr<VFS::Inode> parent) override;
static Result<SharedPtr<VFS::FileSystem>> create();
@ -110,7 +110,7 @@ namespace TmpFS
struct Entry
{
SharedPtr<VFS::Inode> inode;
OwnedStringView name;
char name[128];
};
Vector<Entry> m_entries;

4
kernel/src/main.cpp
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@ -61,7 +61,11 @@ Result<void> init()
VFS::Inode& root_inode = VFS::root_inode();
kinfoln("root inode number: %zu", root_inode.inode_number());
kinfoln("root inode's '.' entry inode number: %zu", TRY(root_inode.find("."))->inode_number());
kinfoln("root inode's '..' entry inode number: %zu", TRY(root_inode.find(".."))->inode_number());
TRY(root_inode.create_file("usr"));
kinfoln("root inode's 'usr' entry inode number: %zu", TRY(root_inode.find("usr"))->inode_number());
TarStream::Entry entry;