1 /* 2 * S390 version 3 * Copyright IBM Corp. 1999 4 * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com), 5 * Christian Borntraeger (cborntra@de.ibm.com), 6 */ 7 8 #ifndef _ASM_S390_CPCMD_H 9 #define _ASM_S390_CPCMD_H 10 11 /* 12 * the lowlevel function for cpcmd 13 * the caller of __cpcmd has to ensure that the response buffer is below 2 GB 14 */ 15 extern int __cpcmd(const char *cmd, char *response, int rlen, int *response_code); 16 17 /* 18 * cpcmd is the in-kernel interface for issuing CP commands 19 * 20 * cmd: null-terminated command string, max 240 characters 21 * response: response buffer for VM's textual response 22 * rlen: size of the response buffer, cpcmd will not exceed this size 23 * but will cap the output, if its too large. Everything that 24 * did not fit into the buffer will be silently dropped 25 * response_code: return pointer for VM's error code 26 * return value: the size of the response. The caller can check if the buffer 27 * was large enough by comparing the return value and rlen 28 * NOTE: If the response buffer is not below 2 GB, cpcmd can sleep 29 */ 30 extern int cpcmd(const char *cmd, char *response, int rlen, int *response_code); 31 32 #endif /* _ASM_S390_CPCMD_H */ 33