1/* 2 * Copyright 2002-2006, Axel D��rfler, axeld@pinc-software.de. 3 * Distributed under the terms of the MIT License. 4 */ 5#ifndef _FSSH_FD_H 6#define _FSSH_FD_H 7 8 9#include "vfs.h" 10 11 12namespace FSShell { 13 14 15struct file_descriptor; 16struct select_sync; 17struct vnode; 18 19extern io_context* gKernelIOContext; 20 21 22struct fd_ops { 23 fssh_status_t (*fd_read)(struct file_descriptor *, fssh_off_t pos, 24 void *buffer, fssh_size_t *length); 25 fssh_status_t (*fd_write)(struct file_descriptor *, fssh_off_t pos, 26 const void *buffer, fssh_size_t *length); 27 fssh_off_t (*fd_seek)(struct file_descriptor *, fssh_off_t pos, 28 int seekType); 29 fssh_status_t (*fd_ioctl)(struct file_descriptor *, uint32_t op, 30 void *buffer, fssh_size_t length); 31 fssh_status_t (*fd_select)(struct file_descriptor *, uint8_t event, 32 uint32_t ref, struct select_sync *sync); 33 fssh_status_t (*fd_deselect)(struct file_descriptor *, uint8_t event, 34 struct select_sync *sync); 35 fssh_status_t (*fd_read_dir)(struct file_descriptor *, 36 struct fssh_dirent *buffer, fssh_size_t bufferSize, 37 uint32_t *_count); 38 fssh_status_t (*fd_rewind_dir)(struct file_descriptor *); 39 fssh_status_t (*fd_read_stat)(struct file_descriptor *, 40 struct fssh_stat *); 41 fssh_status_t (*fd_write_stat)(struct file_descriptor *, 42 const struct fssh_stat *, int statMask); 43 fssh_status_t (*fd_close)(struct file_descriptor *); 44 void (*fd_free)(struct file_descriptor *); 45}; 46 47struct file_descriptor { 48 int32_t type; /* descriptor type */ 49 int32_t ref_count; 50 int32_t open_count; 51 struct fd_ops* ops; 52 union { 53 struct vnode* vnode; 54 struct fs_mount* mount; 55 } u; 56 void* cookie; 57 int32_t open_mode; 58 fssh_off_t pos; 59}; 60 61 62/* Types of file descriptors we can create */ 63 64enum fd_types { 65 FDTYPE_FILE = 1, 66 FDTYPE_ATTR, 67 FDTYPE_DIR, 68 FDTYPE_ATTR_DIR, 69 FDTYPE_INDEX, 70 FDTYPE_INDEX_DIR, 71 FDTYPE_QUERY, 72 FDTYPE_SOCKET 73}; 74 75// additional open mode - kernel special 76#define FSSH_O_DISCONNECTED 0x80000000 77 78/* Prototypes */ 79 80extern file_descriptor* alloc_fd(void); 81extern int new_fd_etc(struct io_context *, 82 struct file_descriptor *, int firstIndex); 83extern int new_fd(struct io_context *, struct file_descriptor *); 84extern file_descriptor* get_fd(struct io_context *, int); 85extern void close_fd(struct file_descriptor *descriptor); 86extern void put_fd(struct file_descriptor *descriptor); 87extern void disconnect_fd(struct file_descriptor *descriptor); 88extern void inc_fd_ref_count(struct file_descriptor *descriptor); 89extern fssh_status_t select_fd(int fd, uint8_t event, uint32_t ref, 90 struct select_sync *sync, bool kernel); 91extern fssh_status_t deselect_fd(int fd, uint8_t event, 92 struct select_sync *sync, bool kernel); 93extern bool fd_is_valid(int fd, bool kernel); 94extern vnode* fd_vnode(struct file_descriptor *descriptor); 95 96extern bool fd_close_on_exec(struct io_context *context, int fd); 97extern void fd_set_close_on_exec(struct io_context *context, int fd, 98 bool closeFD); 99 100static io_context* get_current_io_context(bool kernel); 101 102/* The prototypes of the (sys|user)_ functions are currently defined in vfs.h */ 103 104 105/* Inlines */ 106 107static inline struct io_context * 108get_current_io_context(bool /*kernel*/) 109{ 110 return gKernelIOContext; 111} 112 113 114} // namespace FSShell 115 116 117#endif /* _FSSH_FD_H */ 118