1 /* 2 * Copyright 2003-2005, Axel Dörfler, axeld@pinc-software.de. 3 * Distributed under the terms of the MIT License. 4 */ 5 #ifndef KERNEL_BOOT_VFS_H 6 #define KERNEL_BOOT_VFS_H 7 8 9 #include <SupportDefs.h> 10 11 #include <util/DoublyLinkedList.h> 12 #include <boot/stage2_args.h> 13 14 15 #ifdef __cplusplus 16 17 /** This is the base class for all VFS nodes */ 18 19 class Node : public DoublyLinkedListLinkImpl<Node> { 20 public: 21 Node(); 22 virtual ~Node(); 23 24 virtual status_t Open(void **_cookie, int mode); 25 virtual status_t Close(void *cookie); 26 27 virtual ssize_t ReadAt(void *cookie, off_t pos, void *buffer, size_t bufferSize) = 0; 28 virtual ssize_t WriteAt(void *cookie, off_t pos, const void *buffer, size_t bufferSize) = 0; 29 30 virtual status_t GetName(char *nameBuffer, size_t bufferSize) const; 31 virtual int32 Type() const; 32 virtual off_t Size() const; 33 virtual ino_t Inode() const; 34 35 status_t Acquire(); 36 status_t Release(); 37 38 protected: 39 int32 fRefCount; 40 }; 41 42 typedef DoublyLinkedList<Node> NodeList; 43 typedef NodeList::Iterator NodeIterator; 44 45 46 class Directory : public Node { 47 public: 48 Directory(); 49 50 virtual ssize_t ReadAt(void *cookie, off_t pos, void *buffer, size_t bufferSize); 51 virtual ssize_t WriteAt(void *cookie, off_t pos, const void *buffer, size_t bufferSize); 52 53 virtual int32 Type() const; 54 55 virtual Node *Lookup(const char *name, bool traverseLinks) = 0; 56 57 virtual status_t GetNextEntry(void *cookie, char *nameBuffer, size_t bufferSize) = 0; 58 virtual status_t GetNextNode(void *cookie, Node **_node) = 0; 59 virtual status_t Rewind(void *cookie) = 0; 60 virtual bool IsEmpty() = 0; 61 }; 62 63 /** The console based nodes don't need cookies for I/O, they 64 * also don't support to change the stream position. 65 * Live is simple in the boot loader :-) 66 */ 67 68 class ConsoleNode : public Node { 69 public: 70 ConsoleNode(); 71 72 virtual ssize_t Read(void *buffer, size_t bufferSize); 73 virtual ssize_t Write(const void *buffer, size_t bufferSize); 74 }; 75 76 /* function prototypes */ 77 78 extern status_t vfs_init(stage2_args *args); 79 extern status_t register_boot_file_system(Directory *directory); 80 extern Directory *get_boot_file_system(stage2_args *args); 81 extern status_t mount_file_systems(stage2_args *args); 82 extern int open_node(Node *node, int mode); 83 extern int open_from(Directory *directory, const char *path, int mode); 84 85 extern Node *get_node_from(int fd); 86 87 extern status_t add_partitions_for(int fd, bool mountFileSystems, bool isBootDevice = false); 88 extern status_t add_partitions_for(Node *device, bool mountFileSystems, bool isBootDevice = false); 89 90 #endif /* __cplusplus */ 91 92 #endif /* KERNEL_BOOT_VFS_H */ 93