90 lines
2.8 KiB
C++
90 lines
2.8 KiB
C++
#include "fs/tmpfs/FileSystem.h"
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#include "fs/devices/DeviceRegistry.h"
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#include "fs/tmpfs/Inode.h"
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#include <luna/Alloc.h>
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#include <luna/CString.h>
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#include <luna/Ignore.h>
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namespace TmpFS
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{
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Result<SharedPtr<VFS::FileSystem>> FileSystem::create()
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{
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SharedPtr<FileSystem> fs = TRY(adopt_shared_if_nonnull(new (std::nothrow) FileSystem()));
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SharedPtr<VFS::Inode> root = TRY(fs->create_dir_inode({}));
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root->chmod(0755);
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fs->set_root(root);
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return (SharedPtr<VFS::FileSystem>)fs;
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}
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Result<u64> FileSystem::allocate_inode_number()
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{
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return m_next_inode_number++;
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}
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Result<SharedPtr<VFS::Inode>> FileSystem::create_file_inode()
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{
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SharedPtr<FileInode> inode = TRY(make_shared<FileInode>());
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inode->set_fs(*this, {});
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inode->set_inode_number(m_next_inode_number++, {});
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return (SharedPtr<VFS::Inode>)inode;
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}
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Result<SharedPtr<VFS::Inode>> FileSystem::create_symlink_inode(StringView link)
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{
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SharedPtr<SymlinkInode> inode = TRY(make_shared<SymlinkInode>());
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inode->set_fs(*this, {});
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TRY(inode->set_link(link, {}));
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inode->set_inode_number(m_next_inode_number++, {});
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return (SharedPtr<VFS::Inode>)inode;
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}
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Result<SharedPtr<VFS::Inode>> FileSystem::create_dir_inode(SharedPtr<VFS::Inode> parent)
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{
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SharedPtr<DirInode> inode = TRY(make_shared<DirInode>());
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TRY(inode->add_entry(inode, "."));
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TRY(inode->add_entry(parent ? parent : (SharedPtr<VFS::Inode>)inode, ".."));
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inode->set_self(inode, {});
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inode->set_fs(*this, {});
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inode->set_inode_number(m_next_inode_number++, {});
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return (SharedPtr<VFS::Inode>)inode;
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}
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Result<SharedPtr<VFS::Inode>> FileSystem::create_device_inode(u32 major, u32 minor)
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{
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SharedPtr<Device> device = TRY(DeviceRegistry::fetch_special_device(major, minor));
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SharedPtr<DeviceInode> inode = TRY(make_shared<DeviceInode>());
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inode->set_fs(*this, {});
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inode->set_inode_number(m_next_inode_number++, {});
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inode->set_device(device, {});
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// FIXME: This should be queried from Device directly, but Device doesn't have an API to store and retrieve its
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// device ID atm.
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inode->set_device_id(luna_dev_makedev(major, minor), {});
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return (SharedPtr<VFS::Inode>)inode;
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}
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FileSystem::FileSystem()
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{
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m_host_device_id = DeviceRegistry::next_null_device_id();
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}
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Result<void> FileSystem::set_mount_dir(SharedPtr<VFS::Inode> parent)
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{
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return m_root_inode->replace_entry(parent, "..");
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}
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Result<void> FileSystem::reset_mount_dir()
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{
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return m_root_inode->replace_entry(m_root_inode, "..");
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}
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void FileSystem::set_root(SharedPtr<VFS::Inode> root)
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{
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m_root_inode = root;
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}
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}
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