fcdba07ee3
seems there's no longer need for using con_buf/conf_buf_mtx as vcs_read/vcs_write buffer for user's data. The do_con_write function, that was the other user of this, is currently using its own kmalloc-ed buffer. Not sure when this got changed, as I was able to find this code in 2.6.9, but it's already gone as far as current git history goes - 2.6.12-rc2. AFAICS there's a behaviour change with the current change. The lseek is not completely mutually exclusive with the vcs_read/vcs_write - the file->f_pos might get updated via lseek callback during the vcs_read/vcs_write processing. I tried to find out if the prefered behaviour is to keep this in sync within read/write/lseek functions, but I did not find any pattern on different places. I guess if user end up calling write/lseek from different threads she should know what she's doing. If needed we could use dedicated fd mutex/buffer. Signed-off-by: Jiri Olsa <jolsa@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
171 lines
4.9 KiB
C
171 lines
4.9 KiB
C
#ifndef _VT_KERN_H
|
|
#define _VT_KERN_H
|
|
|
|
/*
|
|
* this really is an extension of the vc_cons structure in console.c, but
|
|
* with information needed by the vt package
|
|
*/
|
|
|
|
#include <linux/vt.h>
|
|
#include <linux/kd.h>
|
|
#include <linux/tty.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/console_struct.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/consolemap.h>
|
|
#include <linux/notifier.h>
|
|
|
|
/*
|
|
* Presently, a lot of graphics programs do not restore the contents of
|
|
* the higher font pages. Defining this flag will avoid use of them, but
|
|
* will lose support for PIO_FONTRESET. Note that many font operations are
|
|
* not likely to work with these programs anyway; they need to be
|
|
* fixed. The linux/Documentation directory includes a code snippet
|
|
* to save and restore the text font.
|
|
*/
|
|
#ifdef CONFIG_VGA_CONSOLE
|
|
#define BROKEN_GRAPHICS_PROGRAMS 1
|
|
#endif
|
|
|
|
extern void kd_mksound(unsigned int hz, unsigned int ticks);
|
|
extern int kbd_rate(struct kbd_repeat *rep);
|
|
extern int fg_console, last_console, want_console;
|
|
|
|
/* console.c */
|
|
|
|
int vc_allocate(unsigned int console);
|
|
int vc_cons_allocated(unsigned int console);
|
|
int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int lines);
|
|
void vc_deallocate(unsigned int console);
|
|
void reset_palette(struct vc_data *vc);
|
|
void do_blank_screen(int entering_gfx);
|
|
void do_unblank_screen(int leaving_gfx);
|
|
void unblank_screen(void);
|
|
void poke_blanked_console(void);
|
|
int con_font_op(struct vc_data *vc, struct console_font_op *op);
|
|
int con_set_cmap(unsigned char __user *cmap);
|
|
int con_get_cmap(unsigned char __user *cmap);
|
|
void scrollback(struct vc_data *vc, int lines);
|
|
void scrollfront(struct vc_data *vc, int lines);
|
|
void update_region(struct vc_data *vc, unsigned long start, int count);
|
|
void redraw_screen(struct vc_data *vc, int is_switch);
|
|
#define update_screen(x) redraw_screen(x, 0)
|
|
#define switch_screen(x) redraw_screen(x, 1)
|
|
|
|
struct tty_struct;
|
|
int tioclinux(struct tty_struct *tty, unsigned long arg);
|
|
|
|
#ifdef CONFIG_CONSOLE_TRANSLATIONS
|
|
/* consolemap.c */
|
|
|
|
struct unimapinit;
|
|
struct unipair;
|
|
|
|
int con_set_trans_old(unsigned char __user * table);
|
|
int con_get_trans_old(unsigned char __user * table);
|
|
int con_set_trans_new(unsigned short __user * table);
|
|
int con_get_trans_new(unsigned short __user * table);
|
|
int con_clear_unimap(struct vc_data *vc, struct unimapinit *ui);
|
|
int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list);
|
|
int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct, struct unipair __user *list);
|
|
int con_set_default_unimap(struct vc_data *vc);
|
|
void con_free_unimap(struct vc_data *vc);
|
|
void con_protect_unimap(struct vc_data *vc, int rdonly);
|
|
int con_copy_unimap(struct vc_data *dst_vc, struct vc_data *src_vc);
|
|
|
|
#define vc_translate(vc, c) ((vc)->vc_translate[(c) | \
|
|
((vc)->vc_toggle_meta ? 0x80 : 0)])
|
|
#else
|
|
static inline int con_set_trans_old(unsigned char __user *table)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline int con_get_trans_old(unsigned char __user *table)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
static inline int con_set_trans_new(unsigned short __user *table)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline int con_get_trans_new(unsigned short __user *table)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
static inline int con_clear_unimap(struct vc_data *vc, struct unimapinit *ui)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline
|
|
int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline
|
|
int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct,
|
|
struct unipair __user *list)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
static inline int con_set_default_unimap(struct vc_data *vc)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline void con_free_unimap(struct vc_data *vc)
|
|
{
|
|
}
|
|
static inline void con_protect_unimap(struct vc_data *vc, int rdonly)
|
|
{
|
|
}
|
|
static inline
|
|
int con_copy_unimap(struct vc_data *dst_vc, struct vc_data *src_vc)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
#define vc_translate(vc, c) (c)
|
|
#endif
|
|
|
|
/* vt.c */
|
|
void vt_event_post(unsigned int event, unsigned int old, unsigned int new);
|
|
int vt_waitactive(int n);
|
|
void change_console(struct vc_data *new_vc);
|
|
void reset_vc(struct vc_data *vc);
|
|
extern int unbind_con_driver(const struct consw *csw, int first, int last,
|
|
int deflt);
|
|
int vty_init(const struct file_operations *console_fops);
|
|
|
|
static inline bool vt_force_oops_output(struct vc_data *vc)
|
|
{
|
|
if (oops_in_progress && vc->vc_panic_force_write)
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
extern char vt_dont_switch;
|
|
extern int default_utf8;
|
|
extern int global_cursor_default;
|
|
|
|
struct vt_spawn_console {
|
|
spinlock_t lock;
|
|
struct pid *pid;
|
|
int sig;
|
|
};
|
|
extern struct vt_spawn_console vt_spawn_con;
|
|
|
|
extern int vt_move_to_console(unsigned int vt, int alloc);
|
|
|
|
/* Interfaces for VC notification of character events (for accessibility etc) */
|
|
|
|
struct vt_notifier_param {
|
|
struct vc_data *vc; /* VC on which the update happened */
|
|
unsigned int c; /* Printed char */
|
|
};
|
|
|
|
extern int register_vt_notifier(struct notifier_block *nb);
|
|
extern int unregister_vt_notifier(struct notifier_block *nb);
|
|
|
|
extern void hide_boot_cursor(bool hide);
|
|
|
|
#endif /* _VT_KERN_H */
|