projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* -*- linux-c -*- |
| 2 | * | |
| 3 | * $Id: sysrq.h,v 1.3 1997/07/17 11:54:33 mj Exp $ | |
| 4 | * | |
| 5 | * Linux Magic System Request Key Hacks | |
| 6 | * | |
| 7 | * (c) 1997 Martin Mares <mj@atrey.karlin.mff.cuni.cz> | |
| 8 | * | |
| 9 | * (c) 2000 Crutcher Dunnavant <crutcher+kernel@datastacks.com> | |
| 10 | * overhauled to use key registration | |
| 11 | * based upon discusions in irc://irc.openprojects.net/#kernelnewbies | |
| 12 | */ | |
| 13 | ||
| 89bbc03c TP |
14 | #ifndef _LINUX_SYSRQ_H |
| 15 | #define _LINUX_SYSRQ_H | |
| 1da177e4 | 16 | |
| 82e3310a TD |
17 | #include <linux/errno.h> |
| 18 | ||
| 1da177e4 LT |
19 | struct pt_regs; |
| 20 | struct tty_struct; | |
| 21 | ||
| 22 | /* Possible values of bitmask for enabling sysrq functions */ | |
| 23 | /* 0x0001 is reserved for enable everything */ | |
| 24 | #define SYSRQ_ENABLE_LOG 0x0002 | |
| 25 | #define SYSRQ_ENABLE_KEYBOARD 0x0004 | |
| 26 | #define SYSRQ_ENABLE_DUMP 0x0008 | |
| 27 | #define SYSRQ_ENABLE_SYNC 0x0010 | |
| 28 | #define SYSRQ_ENABLE_REMOUNT 0x0020 | |
| 29 | #define SYSRQ_ENABLE_SIGNAL 0x0040 | |
| 30 | #define SYSRQ_ENABLE_BOOT 0x0080 | |
| 31 | #define SYSRQ_ENABLE_RTNICE 0x0100 | |
| 32 | ||
| 33 | struct sysrq_key_op { | |
| 1495cc9d | 34 | void (*handler)(int); |
| 1da177e4 LT |
35 | char *help_msg; |
| 36 | char *action_msg; | |
| 37 | int enable_mask; | |
| 38 | }; | |
| 39 | ||
| 40 | #ifdef CONFIG_MAGIC_SYSRQ | |
| 41 | ||
| 42 | /* Generic SysRq interface -- you may call it from any device driver, supplying | |
| 43 | * ASCII code of the key, pointer to registers and kbd/tty structs (if they | |
| 44 | * are available -- else NULL's). | |
| 45 | */ | |
| 46 | ||
| 5d6f647f | 47 | void handle_sysrq(int key, struct tty_struct *tty); |
| edd63cb6 | 48 | void __handle_sysrq(int key, struct tty_struct *tty, int check_mask); |
| 5d6f647f IM |
49 | int register_sysrq_key(int key, struct sysrq_key_op *op); |
| 50 | int unregister_sysrq_key(int key, struct sysrq_key_op *op); | |
| 1da177e4 LT |
51 | struct sysrq_key_op *__sysrq_get_key_op(int key); |
| 52 | ||
| 97f5f0cd DT |
53 | int sysrq_toggle_support(int enable_mask); |
| 54 | ||
| 1da177e4 LT |
55 | #else |
| 56 | ||
| 97f5f0cd | 57 | static inline void handle_sysrq(int key, struct tty_struct *tty) |
| 5d6f647f | 58 | { |
| 5d6f647f | 59 | } |
| 97f5f0cd | 60 | |
| 1495cc9d DT |
61 | static inline void __handle_sysrq(int key, struct tty_struct *tty, int check_mask); |
| 62 | { | |
| 63 | } | |
| 64 | ||
| 97f5f0cd | 65 | static inline int register_sysrq_key(int key, struct sysrq_key_op *op) |
| 1da177e4 LT |
66 | { |
| 67 | return -EINVAL; | |
| 68 | } | |
| 97f5f0cd DT |
69 | |
| 70 | static inline int unregister_sysrq_key(int key, struct sysrq_key_op *op) | |
| 5d6f647f | 71 | { |
| 97f5f0cd | 72 | return -EINVAL; |
| 5d6f647f | 73 | } |
| 1da177e4 | 74 | |
| 1da177e4 | 75 | #endif |
| 89bbc03c TP |
76 | |
| 77 | #endif /* _LINUX_SYSRQ_H */ |