| /* |
| * arch/s390/kernel/cpcmd.h |
| * |
| * S390 version |
| * Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation |
| * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com), |
| * Christian Borntraeger (cborntra@de.ibm.com), |
| */ |
| |
| #ifndef _ASM_S390_CPCMD_H |
| #define _ASM_S390_CPCMD_H |
| |
| /* |
| * the lowlevel function for cpcmd |
| * the caller of __cpcmd has to ensure that the response buffer is below 2 GB |
| */ |
| extern int __cpcmd(const char *cmd, char *response, int rlen, int *response_code); |
| |
| /* |
| * cpcmd is the in-kernel interface for issuing CP commands |
| * |
| * cmd: null-terminated command string, max 240 characters |
| * response: response buffer for VM's textual response |
| * rlen: size of the response buffer, cpcmd will not exceed this size |
| * but will cap the output, if its too large. Everything that |
| * did not fit into the buffer will be silently dropped |
| * response_code: return pointer for VM's error code |
| * return value: the size of the response. The caller can check if the buffer |
| * was large enough by comparing the return value and rlen |
| * NOTE: If the response buffer is not below 2 GB, cpcmd can sleep |
| */ |
| extern int cpcmd(const char *cmd, char *response, int rlen, int *response_code); |
| |
| #endif /* _ASM_S390_CPCMD_H */ |