1 /* SPDX-License-Identifier: GPL-2.0 */ 2 3 #ifndef __PSTORE_BLK_H_ 4 #define __PSTORE_BLK_H_ 5 6 #include <linux/types.h> 7 #include <linux/pstore.h> 8 #include <linux/pstore_zone.h> 9 10 /** 11 * struct pstore_device_info - back-end pstore/blk driver structure. 12 * 13 * @flags: Refer to macro starting with PSTORE_FLAGS defined in 14 * linux/pstore.h. It means what front-ends this device support. 15 * Zero means all backends for compatible. 16 * @zone: The struct pstore_zone_info details. 17 * 18 */ 19 struct pstore_device_info { 20 unsigned int flags; 21 struct pstore_zone_info zone; 22 }; 23 24 int register_pstore_device(struct pstore_device_info *dev); 25 void unregister_pstore_device(struct pstore_device_info *dev); 26 27 /** 28 * struct pstore_blk_config - the pstore_blk backend configuration 29 * 30 * @device: Name of the desired block device 31 * @max_reason: Maximum kmsg dump reason to store to block device 32 * @kmsg_size: Total size of for kmsg dumps 33 * @pmsg_size: Total size of the pmsg storage area 34 * @console_size: Total size of the console storage area 35 * @ftrace_size: Total size for ftrace logging data (for all CPUs) 36 */ 37 struct pstore_blk_config { 38 char device[80]; 39 enum kmsg_dump_reason max_reason; 40 unsigned long kmsg_size; 41 unsigned long pmsg_size; 42 unsigned long console_size; 43 unsigned long ftrace_size; 44 }; 45 46 /** 47 * pstore_blk_get_config - get a copy of the pstore_blk backend configuration 48 * 49 * @info: The sturct pstore_blk_config to be filled in 50 * 51 * Failure returns negative error code, and success returns 0. 52 */ 53 int pstore_blk_get_config(struct pstore_blk_config *info); 54 55 #endif 56