1 /* 2 * Persistent Storage - pstore.h 3 * 4 * Copyright (C) 2010 Intel Corporation <[email protected]> 5 * 6 * This code is the generic layer to export data records from platform 7 * level persistent storage via a file system. 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License version 2 as 11 * published by the Free Software Foundation. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 */ 22 #ifndef _LINUX_PSTORE_H 23 #define _LINUX_PSTORE_H 24 25 /* types */ 26 enum pstore_type_id { 27 PSTORE_TYPE_DMESG = 0, 28 PSTORE_TYPE_MCE = 1, 29 PSTORE_TYPE_UNKNOWN = 255 30 }; 31 32 struct pstore_info { 33 struct module *owner; 34 char *name; 35 spinlock_t buf_lock; /* serialize access to 'buf' */ 36 char *buf; 37 size_t bufsize; 38 struct mutex read_mutex; /* serialize open/read/close */ 39 int (*open)(struct pstore_info *psi); 40 int (*close)(struct pstore_info *psi); 41 ssize_t (*read)(u64 *id, enum pstore_type_id *type, 42 struct timespec *time, char **buf, 43 struct pstore_info *psi); 44 int (*write)(enum pstore_type_id type, u64 *id, 45 unsigned int part, size_t size, struct pstore_info *psi); 46 int (*erase)(enum pstore_type_id type, u64 id, 47 struct pstore_info *psi); 48 void *data; 49 }; 50 51 #ifdef CONFIG_PSTORE 52 extern int pstore_register(struct pstore_info *); 53 extern int pstore_write(enum pstore_type_id type, char *buf, size_t size); 54 #else 55 static inline int 56 pstore_register(struct pstore_info *psi) 57 { 58 return -ENODEV; 59 } 60 static inline int 61 pstore_write(enum pstore_type_id type, char *buf, size_t size) 62 { 63 return -ENODEV; 64 } 65 #endif 66 67 #endif /*_LINUX_PSTORE_H*/ 68