95 lines
2.5 KiB
C++
95 lines
2.5 KiB
C++
/*
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* Copyright 2003-2004, Axel Dörfler, axeld@pinc-software.de.
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* Distributed under the terms of the MIT License.
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*/
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#ifndef KERNEL_BOOT_VFS_H
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#define KERNEL_BOOT_VFS_H
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#include <SupportDefs.h>
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#include <util/DoublyLinkedList.h>
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#include <boot/stage2_args.h>
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#ifdef __cplusplus
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/** This is the base class for all VFS nodes */
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class Node {
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public:
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Node();
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virtual ~Node();
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virtual status_t Open(void **_cookie, int mode);
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virtual status_t Close(void *cookie);
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virtual ssize_t ReadAt(void *cookie, off_t pos, void *buffer, size_t bufferSize) = 0;
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virtual ssize_t WriteAt(void *cookie, off_t pos, const void *buffer, size_t bufferSize) = 0;
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virtual status_t GetName(char *nameBuffer, size_t bufferSize) const;
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virtual int32 Type() const;
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virtual off_t Size() const;
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virtual ino_t Inode() const;
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status_t Acquire();
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status_t Release();
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DoublyLinked::Link fLink;
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protected:
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int32 fRefCount;
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};
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typedef DoublyLinked::List<Node> NodeList;
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typedef DoublyLinked::Iterator<Node> NodeIterator;
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class Directory : public Node {
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public:
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Directory();
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virtual ssize_t ReadAt(void *cookie, off_t pos, void *buffer, size_t bufferSize);
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virtual ssize_t WriteAt(void *cookie, off_t pos, const void *buffer, size_t bufferSize);
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virtual int32 Type() const;
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virtual Node *Lookup(const char *name, bool traverseLinks) = 0;
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virtual status_t GetNextEntry(void *cookie, char *nameBuffer, size_t bufferSize) = 0;
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virtual status_t GetNextNode(void *cookie, Node **_node) = 0;
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virtual status_t Rewind(void *cookie) = 0;
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virtual bool IsEmpty() = 0;
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};
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/** The console based nodes don't need cookies for I/O, they
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* also don't support to change the stream position.
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* Live is simple in the boot loader :-)
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*/
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class ConsoleNode : public Node {
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public:
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ConsoleNode();
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virtual ssize_t Read(void *buffer, size_t bufferSize);
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virtual ssize_t Write(const void *buffer, size_t bufferSize);
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};
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/* function prototypes */
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extern status_t vfs_init(stage2_args *args);
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extern status_t register_boot_file_system(Directory *directory);
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extern Directory *get_boot_file_system(stage2_args *args);
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extern status_t mount_file_systems(stage2_args *args);
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extern int open_node(Node *node, int mode);
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extern int open_from(Directory *directory, const char *path, int mode);
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extern Node *get_node_from(int fd);
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extern status_t add_partitions_for(int fd, bool mountFileSystems);
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extern status_t add_partitions_for(Node *device, bool mountFileSystems);
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#endif /* __cplusplus */
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#endif /* KERNEL_BOOT_VFS_H */
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