* based upon discusions in irc://irc.openprojects.net/#kernelnewbies
*/
-#include <linux/config.h>
+#ifndef _LINUX_SYSRQ_H
+#define _LINUX_SYSRQ_H
struct pt_regs;
struct tty_struct;
+/* Possible values of bitmask for enabling sysrq functions */
+/* 0x0001 is reserved for enable everything */
+#define SYSRQ_ENABLE_LOG 0x0002
+#define SYSRQ_ENABLE_KEYBOARD 0x0004
+#define SYSRQ_ENABLE_DUMP 0x0008
+#define SYSRQ_ENABLE_SYNC 0x0010
+#define SYSRQ_ENABLE_REMOUNT 0x0020
+#define SYSRQ_ENABLE_SIGNAL 0x0040
+#define SYSRQ_ENABLE_BOOT 0x0080
+#define SYSRQ_ENABLE_RTNICE 0x0100
+
struct sysrq_key_op {
- void (*handler)(int, struct pt_regs *, struct tty_struct *);
+ void (*handler)(int, struct tty_struct *);
char *help_msg;
char *action_msg;
+ int enable_mask;
};
#ifdef CONFIG_MAGIC_SYSRQ
+extern int sysrq_on(void);
+
+/*
+ * Do not use this one directly:
+ */
+extern int __sysrq_enabled;
+
/* Generic SysRq interface -- you may call it from any device driver, supplying
* ASCII code of the key, pointer to registers and kbd/tty structs (if they
* are available -- else NULL's).
*/
-void handle_sysrq(int, struct pt_regs *, struct tty_struct *);
-void __handle_sysrq(int, struct pt_regs *, struct tty_struct *);
-int register_sysrq_key(int, struct sysrq_key_op *);
-int unregister_sysrq_key(int, struct sysrq_key_op *);
+void handle_sysrq(int key, struct tty_struct *tty);
+void __handle_sysrq(int key, struct tty_struct *tty, int check_mask);
+int register_sysrq_key(int key, struct sysrq_key_op *op);
+int unregister_sysrq_key(int key, struct sysrq_key_op *op);
struct sysrq_key_op *__sysrq_get_key_op(int key);
#else
+static inline int sysrq_on(void)
+{
+ return 0;
+}
static inline int __reterr(void)
{
return -EINVAL;
}
+static inline void handle_sysrq(int key, struct tty_struct *tty)
+{
+}
#define register_sysrq_key(ig,nore) __reterr()
#define unregister_sysrq_key(ig,nore) __reterr()
#endif
+
+#endif /* _LINUX_SYSRQ_H */