1ca01d6ddSTony Luck /* 2ca01d6ddSTony Luck * Persistent Storage - pstore.h 3ca01d6ddSTony Luck * 4ca01d6ddSTony Luck * Copyright (C) 2010 Intel Corporation <tony.luck@intel.com> 5ca01d6ddSTony Luck * 6ca01d6ddSTony Luck * This code is the generic layer to export data records from platform 7ca01d6ddSTony Luck * level persistent storage via a file system. 8ca01d6ddSTony Luck * 9ca01d6ddSTony Luck * This program is free software; you can redistribute it and/or modify 10ca01d6ddSTony Luck * it under the terms of the GNU General Public License version 2 as 11ca01d6ddSTony Luck * published by the Free Software Foundation. 12ca01d6ddSTony Luck * 13ca01d6ddSTony Luck * This program is distributed in the hope that it will be useful, 14ca01d6ddSTony Luck * but WITHOUT ANY WARRANTY; without even the implied warranty of 15ca01d6ddSTony Luck * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16ca01d6ddSTony Luck * GNU General Public License for more details. 17ca01d6ddSTony Luck * 18ca01d6ddSTony Luck * You should have received a copy of the GNU General Public License 19ca01d6ddSTony Luck * along with this program; if not, write to the Free Software 20ca01d6ddSTony Luck * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21ca01d6ddSTony Luck */ 22ca01d6ddSTony Luck #ifndef _LINUX_PSTORE_H 23ca01d6ddSTony Luck #define _LINUX_PSTORE_H 24ca01d6ddSTony Luck 253d6d8d20SKees Cook #include <linux/time.h> 263d6d8d20SKees Cook #include <linux/kmsg_dump.h> 2767a101f5SAnton Vorontsov #include <linux/mutex.h> 2867a101f5SAnton Vorontsov #include <linux/types.h> 2967a101f5SAnton Vorontsov #include <linux/spinlock.h> 3067a101f5SAnton Vorontsov #include <linux/errno.h> 313d6d8d20SKees Cook 32ca01d6ddSTony Luck /* types */ 33ca01d6ddSTony Luck enum pstore_type_id { 34ca01d6ddSTony Luck PSTORE_TYPE_DMESG = 0, 35ca01d6ddSTony Luck PSTORE_TYPE_MCE = 1, 36f29e5956SAnton Vorontsov PSTORE_TYPE_CONSOLE = 2, 37060287b8SAnton Vorontsov PSTORE_TYPE_FTRACE = 3, 38*69020eeaSAruna Balakrishnaiah /* PPC64 partition types */ 39*69020eeaSAruna Balakrishnaiah PSTORE_TYPE_PPC_RTAS = 4, 40ca01d6ddSTony Luck PSTORE_TYPE_UNKNOWN = 255 41ca01d6ddSTony Luck }; 42ca01d6ddSTony Luck 4367a101f5SAnton Vorontsov struct module; 4467a101f5SAnton Vorontsov 45ca01d6ddSTony Luck struct pstore_info { 46ca01d6ddSTony Luck struct module *owner; 47ca01d6ddSTony Luck char *name; 48abd4d558SDon Zickus spinlock_t buf_lock; /* serialize access to 'buf' */ 49ca01d6ddSTony Luck char *buf; 50ca01d6ddSTony Luck size_t bufsize; 51f6f82851SKees Cook struct mutex read_mutex; /* serialize open/read/close */ 5206cf91b4SChen Gong int (*open)(struct pstore_info *psi); 5306cf91b4SChen Gong int (*close)(struct pstore_info *psi); 548d38d74bSChen Gong ssize_t (*read)(u64 *id, enum pstore_type_id *type, 55755d4fe4SSeiji Aguchi int *count, struct timespec *time, char **buf, 56f6f82851SKees Cook struct pstore_info *psi); 573d6d8d20SKees Cook int (*write)(enum pstore_type_id type, 583d6d8d20SKees Cook enum kmsg_dump_reason reason, u64 *id, 59755d4fe4SSeiji Aguchi unsigned int part, int count, size_t size, 60755d4fe4SSeiji Aguchi struct pstore_info *psi); 61897dba02SAnton Vorontsov int (*write_buf)(enum pstore_type_id type, 62897dba02SAnton Vorontsov enum kmsg_dump_reason reason, u64 *id, 63897dba02SAnton Vorontsov unsigned int part, const char *buf, size_t size, 64897dba02SAnton Vorontsov struct pstore_info *psi); 6556280682SMatthew Garrett int (*erase)(enum pstore_type_id type, u64 id, 66755d4fe4SSeiji Aguchi int count, struct timespec time, 67755d4fe4SSeiji Aguchi struct pstore_info *psi); 68638c1fd3SMatthew Garrett void *data; 69ca01d6ddSTony Luck }; 70ca01d6ddSTony Luck 71ca01d6ddSTony Luck #ifdef CONFIG_PSTORE 72ca01d6ddSTony Luck extern int pstore_register(struct pstore_info *); 739f244e9cSSeiji Aguchi extern bool pstore_cannot_block_path(enum kmsg_dump_reason reason); 74ca01d6ddSTony Luck #else 75ca01d6ddSTony Luck static inline int 76ca01d6ddSTony Luck pstore_register(struct pstore_info *psi) 77ca01d6ddSTony Luck { 78ca01d6ddSTony Luck return -ENODEV; 79ca01d6ddSTony Luck } 809f244e9cSSeiji Aguchi static inline bool 819f244e9cSSeiji Aguchi pstore_cannot_block_path(enum kmsg_dump_reason reason) 829f244e9cSSeiji Aguchi { 839f244e9cSSeiji Aguchi return false; 849f244e9cSSeiji Aguchi } 85ca01d6ddSTony Luck #endif 86ca01d6ddSTony Luck 87ca01d6ddSTony Luck #endif /*_LINUX_PSTORE_H*/ 88