120 lines
3.6 KiB
C
120 lines
3.6 KiB
C
/*
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* Copyright 2002-2006, 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 _FD_H
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#define _FD_H
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#include <vfs.h>
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#include <team.h>
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#include <thread.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct file_descriptor;
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struct io_context;
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struct net_socket;
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struct selectsync;
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struct select_info;
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struct fd_ops {
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status_t (*fd_read)(struct file_descriptor *, off_t pos, void *buffer, size_t *length);
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status_t (*fd_write)(struct file_descriptor *, off_t pos, const void *buffer, size_t *length);
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off_t (*fd_seek)(struct file_descriptor *, off_t pos, int seekType);
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status_t (*fd_ioctl)(struct file_descriptor *, ulong op, void *buffer, size_t length);
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status_t (*fd_set_flags)(struct file_descriptor *, int flags);
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status_t (*fd_select)(struct file_descriptor *, uint8 event,
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struct selectsync *sync);
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status_t (*fd_deselect)(struct file_descriptor *, uint8 event,
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struct selectsync *sync);
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status_t (*fd_read_dir)(struct io_context* ioContext,
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struct file_descriptor *, struct dirent *buffer,
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size_t bufferSize, uint32 *_count);
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status_t (*fd_rewind_dir)(struct file_descriptor *);
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status_t (*fd_read_stat)(struct file_descriptor *, struct stat *);
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status_t (*fd_write_stat)(struct file_descriptor *, const struct stat *, int statMask);
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status_t (*fd_close)(struct file_descriptor *);
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void (*fd_free)(struct file_descriptor *);
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};
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struct file_descriptor {
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int32 type; /* descriptor type */
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int32 ref_count;
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int32 open_count;
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struct fd_ops *ops;
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union {
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struct vnode *vnode;
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struct fs_mount *mount;
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struct net_socket *socket;
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} u;
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void *cookie;
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int32 open_mode;
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off_t pos;
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};
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/* Types of file descriptors we can create */
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enum fd_types {
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FDTYPE_FILE = 1,
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FDTYPE_ATTR,
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FDTYPE_DIR,
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FDTYPE_ATTR_DIR,
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FDTYPE_INDEX,
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FDTYPE_INDEX_DIR,
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FDTYPE_QUERY,
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FDTYPE_SOCKET
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};
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// additional open mode - kernel special
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#define O_DISCONNECTED 0x80000000
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/* Prototypes */
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extern struct file_descriptor *alloc_fd(void);
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extern int new_fd_etc(struct io_context *, struct file_descriptor *, int firstIndex);
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extern int new_fd(struct io_context *, struct file_descriptor *);
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extern struct file_descriptor *get_fd(struct io_context *, int);
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extern struct file_descriptor *get_open_fd(struct io_context *, int);
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extern void close_fd(struct file_descriptor *descriptor);
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extern status_t close_fd_index(struct io_context *context, int fd);
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extern void put_fd(struct file_descriptor *descriptor);
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extern void disconnect_fd(struct file_descriptor *descriptor);
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extern void inc_fd_ref_count(struct file_descriptor *descriptor);
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extern int dup_foreign_fd(team_id fromTeam, int fd, bool kernel);
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extern status_t select_fd(int32 fd, struct select_info *info, bool kernel);
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extern status_t deselect_fd(int32 fd, struct select_info *info, bool kernel);
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extern bool fd_is_valid(int fd, bool kernel);
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extern struct vnode *fd_vnode(struct file_descriptor *descriptor);
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extern bool fd_close_on_exec(struct io_context *context, int fd);
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extern void fd_set_close_on_exec(struct io_context *context, int fd, bool closeFD);
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static struct io_context *get_current_io_context(bool kernel);
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extern status_t user_fd_kernel_ioctl(int fd, ulong op, void *buffer, size_t length);
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/* The prototypes of the (sys|user)_ functions are currently defined in vfs.h */
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/* Inlines */
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static inline struct io_context *
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get_current_io_context(bool kernel)
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{
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if (kernel)
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return (struct io_context *)team_get_kernel_team()->io_context;
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return (struct io_context *)thread_get_current_thread()->team->io_context;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* _FD_H */
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