#include <linux/pm.h>
#include <linux/font.h>
#include <linux/bitops.h>
+#include <linux/notifier.h>
#include <asm/io.h>
#include <asm/system.h>
blank_vesa_wait,
};
+/*
+ * Notifier list for console events.
+ */
+static ATOMIC_NOTIFIER_HEAD(vt_notifier_list);
+
+int register_vt_notifier(struct notifier_block *nb)
+{
+ return atomic_notifier_chain_register(&vt_notifier_list, nb);
+}
+EXPORT_SYMBOL_GPL(register_vt_notifier);
+
+int unregister_vt_notifier(struct notifier_block *nb)
+{
+ return atomic_notifier_chain_unregister(&vt_notifier_list, nb);
+}
+EXPORT_SYMBOL_GPL(unregister_vt_notifier);
+
+static void notify_write(struct vc_data *vc, unsigned int unicode)
+{
+ struct vt_notifier_param param = { .vc = vc, unicode = unicode };
+ atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, ¶m);
+}
+
+static void notify_update(struct vc_data *vc)
+{
+ struct vt_notifier_param param = { .vc = vc };
+ atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, ¶m);
+}
+
/*
* Low-Level Functions
*/
d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
- scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char,
+ scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_scrl_erase_char,
vc->vc_size_row * nr);
}
s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
step = vc->vc_cols * nr;
scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
- scr_memsetw(s, vc->vc_video_erase_char, 2 * step);
+ scr_memsetw(s, vc->vc_scrl_erase_char, 2 * step);
}
static void do_update_region(struct vc_data *vc, unsigned long start, int count)
* Bit 7 : blink
*/
{
- u8 a = vc->vc_color;
+ u8 a = _color;
if (!vc->vc_can_do_color)
return _intensity |
(_italic ? 2 : 0) |
vc->vc_blink, vc->vc_underline,
vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic);
vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' ';
+ vc->vc_scrl_erase_char = (build_attr(vc, vc->vc_def_color, 1, false, false, false, false) << 8) | ' ';
}
/* Note: inverting the screen twice should revert to the original state */
if (is_switch) {
set_leds();
compute_shiftstate();
+ notify_update(vc);
}
}
return -ENXIO;
if (!vc_cons[currcons].d) {
struct vc_data *vc;
+ struct vt_notifier_param param;
/* prevent users from taking too much memory */
if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
/* although the numbers above are not valid since long ago, the
point is still up-to-date and the comment still has its value
even if only as a historical artifact. --mj, July 1998 */
- vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL);
+ param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL);
if (!vc)
return -ENOMEM;
vc_cons[currcons].d = vc;
}
vc->vc_kmalloced = 1;
vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
+ atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, ¶m);
}
return 0;
}
if (vc_cons_allocated(currcons)) {
struct vc_data *vc = vc_cons[currcons].d;
+ struct vt_notifier_param param = { .vc = vc };
+ atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, ¶m);
vc->vc_sw->con_deinit(vc);
put_pid(vc->vt_pid);
module_put(vc->vc_sw->owner);
vc->vc_pos += vc->vc_size_row;
}
vc->vc_need_wrap = 0;
+ notify_write(vc, '\n');
}
static void ri(struct vc_data *vc)
{
vc->vc_pos -= vc->vc_x << 1;
vc->vc_need_wrap = vc->vc_x = 0;
+ notify_write(vc, '\r');
}
static inline void bs(struct vc_data *vc)
vc->vc_pos -= 2;
vc->vc_x--;
vc->vc_need_wrap = 0;
+ notify_write(vc, '\b');
}
}
break;
}
vc->vc_pos += (vc->vc_x << 1);
+ notify_write(vc, '\t');
return;
case 10: case 11: case 12:
lf(vc);
unsigned long draw_from = 0, draw_to = 0;
struct vc_data *vc;
unsigned char vc_attr;
+ struct vt_notifier_param param;
uint8_t rescan;
uint8_t inverse;
uint8_t width;
if (IS_FG(vc))
hide_cursor(vc);
+ param.vc = vc;
+
while (!tty->stopped && count) {
int orig = *buf;
c = orig;
tc = vc->vc_translate[vc->vc_toggle_meta ? (c | 0x80) : c];
}
+ param.c = tc;
+ if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE,
+ ¶m) == NOTIFY_STOP)
+ continue;
+
/* If the original code was a control character we
* only allow a glyph to be displayed if the code is
* not normally used (such as for cursor movement) or
tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */
if (tc < 0) tc = ' ';
}
+ notify_write(vc, c);
if (inverse) {
FLUSH
release_console_sem();
out:
+ notify_update(vc);
return n;
#undef FLUSH
}
do_blank_screen(0);
blank_timer_expired = 0;
}
+ notify_update(vc_cons[fg_console].d);
release_console_sem();
}
{
struct vc_data *vc = vc_cons[fg_console].d;
unsigned char c;
- static unsigned long printing;
+ static DEFINE_SPINLOCK(printing_lock);
const ushort *start;
ushort cnt = 0;
ushort myx;
/* console busy or not yet initialized */
- if (!printable || test_and_set_bit(0, &printing))
+ if (!printable)
+ return;
+ if (!spin_trylock(&printing_lock))
return;
if (kmsg_redirect && vc_cons_allocated(kmsg_redirect - 1))
continue;
}
scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
+ notify_write(vc, c);
cnt++;
if (myx == vc->vc_cols - 1) {
vc->vc_need_wrap = 1;
}
}
set_cursor(vc);
+ notify_update(vc);
quit:
- clear_bit(0, &printing);
+ spin_unlock(&printing_lock);
}
static struct tty_driver *vt_console_device(struct console *c, int *index)