forked from luck/tmp_suning_uos_patched
3a51237dc1
* when we have stop/sysrq/go, we get pt_regs of whatever executes mc_work_proc(). Would be better to see what we had at the time of interrupt that got us stop. * stop/stop/stop..... will give stack overflow. Shouldn't allow stop from mconsole_stop(). * stop/stop/go leaves us inside mconsole_stop() with os_set_fd_block(req->originating_fd, 0); reactivate_fd(req->originating_fd, MCONSOLE_IRQ); just done by nested mconsole_stop(). Ditto. * once we'd seen stop, there's a period when INTR commands are executed out of order (as they should; we might have the things stuck badly enough to never reach mconsole_stop(), but still not badly enough to block mconsole_interrupt(); in that situation we _want_ things like "cad" to be executed immediately). Once we enter monsole_stop(), all INTR commands will be executed in order, mixed with PROC ones. We'd better let user see that such change of behaviour has happened. (Suggested by lennert). * stack footprint of monsole_interrupt() is an atrocity; AFAICS we can safely make struct mc_request req; static in function there. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Acked-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
108 lines
2.7 KiB
C
108 lines
2.7 KiB
C
/*
|
|
* Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org)
|
|
* Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
|
|
* Licensed under the GPL
|
|
*/
|
|
|
|
#ifndef __MCONSOLE_H__
|
|
#define __MCONSOLE_H__
|
|
|
|
#ifndef __KERNEL__
|
|
#include <stdint.h>
|
|
#define u32 uint32_t
|
|
#endif
|
|
|
|
#define MCONSOLE_MAGIC (0xcafebabe)
|
|
#define MCONSOLE_MAX_DATA (512)
|
|
#define MCONSOLE_VERSION 2
|
|
|
|
struct mconsole_request {
|
|
u32 magic;
|
|
u32 version;
|
|
u32 len;
|
|
char data[MCONSOLE_MAX_DATA];
|
|
};
|
|
|
|
struct mconsole_reply {
|
|
u32 err;
|
|
u32 more;
|
|
u32 len;
|
|
char data[MCONSOLE_MAX_DATA];
|
|
};
|
|
|
|
struct mconsole_notify {
|
|
u32 magic;
|
|
u32 version;
|
|
enum { MCONSOLE_SOCKET, MCONSOLE_PANIC, MCONSOLE_HANG,
|
|
MCONSOLE_USER_NOTIFY } type;
|
|
u32 len;
|
|
char data[MCONSOLE_MAX_DATA];
|
|
};
|
|
|
|
struct mc_request;
|
|
|
|
enum mc_context { MCONSOLE_INTR, MCONSOLE_PROC };
|
|
|
|
struct mconsole_command
|
|
{
|
|
char *command;
|
|
void (*handler)(struct mc_request *req);
|
|
enum mc_context context;
|
|
};
|
|
|
|
struct mc_request
|
|
{
|
|
int len;
|
|
int as_interrupt;
|
|
|
|
int originating_fd;
|
|
unsigned int originlen;
|
|
unsigned char origin[128]; /* sockaddr_un */
|
|
|
|
struct mconsole_request request;
|
|
struct mconsole_command *cmd;
|
|
union uml_pt_regs regs;
|
|
};
|
|
|
|
extern char mconsole_socket_name[];
|
|
|
|
extern int mconsole_unlink_socket(void);
|
|
extern int mconsole_reply_len(struct mc_request *req, const char *reply,
|
|
int len, int err, int more);
|
|
extern int mconsole_reply(struct mc_request *req, const char *str, int err,
|
|
int more);
|
|
|
|
extern void mconsole_version(struct mc_request *req);
|
|
extern void mconsole_help(struct mc_request *req);
|
|
extern void mconsole_halt(struct mc_request *req);
|
|
extern void mconsole_reboot(struct mc_request *req);
|
|
extern void mconsole_config(struct mc_request *req);
|
|
extern void mconsole_remove(struct mc_request *req);
|
|
extern void mconsole_sysrq(struct mc_request *req);
|
|
extern void mconsole_cad(struct mc_request *req);
|
|
extern void mconsole_stop(struct mc_request *req);
|
|
extern void mconsole_go(struct mc_request *req);
|
|
extern void mconsole_log(struct mc_request *req);
|
|
extern void mconsole_proc(struct mc_request *req);
|
|
extern void mconsole_stack(struct mc_request *req);
|
|
|
|
extern int mconsole_get_request(int fd, struct mc_request *req);
|
|
extern int mconsole_notify(char *sock_name, int type, const void *data,
|
|
int len);
|
|
extern char *mconsole_notify_socket(void);
|
|
extern void lock_notify(void);
|
|
extern void unlock_notify(void);
|
|
|
|
#endif
|
|
|
|
/*
|
|
* Overrides for Emacs so that we follow Linus's tabbing style.
|
|
* Emacs will notice this stuff at the end of the file and automatically
|
|
* adjust the settings for this buffer only. This must remain at the end
|
|
* of the file.
|
|
* ---------------------------------------------------------------------------
|
|
* Local variables:
|
|
* c-file-style: "linux"
|
|
* End:
|
|
*/
|