1 /* 2 * A resource offering support for directory operations. 3 * 4 * Copyright (C) 2021 Paul Boddie <paul@boddie.org.uk> 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License as 8 * published by the Free Software Foundation; either version 2 of 9 * the License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, 19 * Boston, MA 02110-1301, USA 20 */ 21 22 #pragma once 23 24 #include <fsserver/directory_object_interface.h> 25 #include <fsserver/directory_provider.h> 26 #include <fsserver/file_registry.h> 27 #include <fsserver/resource.h> 28 29 30 31 /* Support for providing access to directories. */ 32 33 class DirectoryResource : public Resource, public DirectoryObject 34 { 35 protected: 36 FileRegistry *_registry; 37 DirectoryProvider *_provider; 38 39 /* Notification endpoint for event subscription. */ 40 41 unsigned int _endpoint; 42 43 public: 44 fileid_t fileid; 45 46 DirectoryResource(fileid_t fileid, DirectoryProvider *provider, 47 FileRegistry *registry); 48 49 virtual ~DirectoryResource(); 50 51 virtual void close(); 52 53 /* Server details. */ 54 55 int expected_items(); 56 57 ipc_server_handler_type handler(); 58 59 void *interface() 60 { return static_cast<DirectoryObject *>(this); } 61 62 /* Directory reading methods. */ 63 64 virtual long opendir(offset_t *size, l4_cap_idx_t *cap, 65 object_flags_t *object_flags); 66 67 /* Notification methods. */ 68 69 virtual long subscribe(l4_cap_idx_t endpoint, notify_flags_t flags); 70 71 virtual long unsubscribe(l4_cap_idx_t endpoint); 72 }; 73 74 // vim: tabstop=4 expandtab shiftwidth=4