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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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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
/*
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* Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org)
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* Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
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* Licensed under the GPL
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*/
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#ifndef __MCONSOLE_H__
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#define __MCONSOLE_H__
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#ifndef __KERNEL__
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#include <stdint.h>
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#define u32 uint32_t
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#endif
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#define MCONSOLE_MAGIC (0xcafebabe)
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#define MCONSOLE_MAX_DATA (512)
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#define MCONSOLE_VERSION 2
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struct mconsole_request {
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u32 magic;
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u32 version;
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u32 len;
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char data[MCONSOLE_MAX_DATA];
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};
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struct mconsole_reply {
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u32 err;
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u32 more;
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u32 len;
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char data[MCONSOLE_MAX_DATA];
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};
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struct mconsole_notify {
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u32 magic;
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u32 version;
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enum { MCONSOLE_SOCKET, MCONSOLE_PANIC, MCONSOLE_HANG,
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MCONSOLE_USER_NOTIFY } type;
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u32 len;
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char data[MCONSOLE_MAX_DATA];
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};
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struct mc_request;
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enum mc_context { MCONSOLE_INTR, MCONSOLE_PROC };
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struct mconsole_command
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{
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char *command;
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void (*handler)(struct mc_request *req);
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enum mc_context context;
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};
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struct mc_request
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{
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int len;
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int as_interrupt;
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int originating_fd;
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unsigned int originlen;
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unsigned char origin[128]; /* sockaddr_un */
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struct mconsole_request request;
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struct mconsole_command *cmd;
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union uml_pt_regs regs;
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};
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extern char mconsole_socket_name[];
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extern int mconsole_unlink_socket(void);
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extern int mconsole_reply_len(struct mc_request *req, const char *reply,
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int len, int err, int more);
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extern int mconsole_reply(struct mc_request *req, const char *str, int err,
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int more);
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extern void mconsole_version(struct mc_request *req);
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extern void mconsole_help(struct mc_request *req);
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extern void mconsole_halt(struct mc_request *req);
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extern void mconsole_reboot(struct mc_request *req);
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extern void mconsole_config(struct mc_request *req);
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extern void mconsole_remove(struct mc_request *req);
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extern void mconsole_sysrq(struct mc_request *req);
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extern void mconsole_cad(struct mc_request *req);
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extern void mconsole_stop(struct mc_request *req);
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extern void mconsole_go(struct mc_request *req);
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extern void mconsole_log(struct mc_request *req);
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extern void mconsole_proc(struct mc_request *req);
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extern void mconsole_stack(struct mc_request *req);
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extern int mconsole_get_request(int fd, struct mc_request *req);
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extern int mconsole_notify(char *sock_name, int type, const void *data,
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int len);
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extern char *mconsole_notify_socket(void);
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extern void lock_notify(void);
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extern void unlock_notify(void);
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#endif
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/*
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* Overrides for Emacs so that we follow Linus's tabbing style.
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* Emacs will notice this stuff at the end of the file and automatically
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* adjust the settings for this buffer only. This must remain at the end
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* of the file.
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* ---------------------------------------------------------------------------
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* Local variables:
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* c-file-style: "linux"
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* End:
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*/
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