/* * Persistent Storage - pstore.h * * Copyright (C) 2010 Intel Corporation <tony.luck@intel.com> * * This code is the generic layer to export data records from platform * level persistent storage via a file system. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #ifndef _LINUX_PSTORE_H #define _LINUX_PSTORE_H #include <linux/time.h> #include <linux/kmsg_dump.h> #include <linux/mutex.h> #include <linux/types.h> #include <linux/spinlock.h> #include <linux/errno.h> /* types */ enum pstore_type_id { PSTORE_TYPE_DMESG = 0, PSTORE_TYPE_MCE = 1, PSTORE_TYPE_CONSOLE = 2, PSTORE_TYPE_FTRACE = 3, /* PPC64 partition types */ PSTORE_TYPE_PPC_RTAS = 4, PSTORE_TYPE_PPC_OF = 5, PSTORE_TYPE_PPC_COMMON = 6, PSTORE_TYPE_UNKNOWN = 255 }; struct module; struct pstore_info { struct module *owner; char *name; spinlock_t buf_lock; /* serialize access to 'buf' */ char *buf; size_t bufsize; struct mutex read_mutex; /* serialize open/read/close */ int (*open)(struct pstore_info *psi); int (*close)(struct pstore_info *psi); ssize_t (*read)(u64 *id, enum pstore_type_id *type, int *count, struct timespec *time, char **buf, struct pstore_info *psi); int (*write)(enum pstore_type_id type, enum kmsg_dump_reason reason, u64 *id, unsigned int part, int count, size_t hsize, size_t size, struct pstore_info *psi); int (*write_buf)(enum pstore_type_id type, enum kmsg_dump_reason reason, u64 *id, unsigned int part, const char *buf, size_t hsize, size_t size, struct pstore_info *psi); int (*erase)(enum pstore_type_id type, u64 id, int count, struct timespec time, struct pstore_info *psi); void *data; }; #ifdef CONFIG_PSTORE extern int pstore_register(struct pstore_info *); extern bool pstore_cannot_block_path(enum kmsg_dump_reason reason); #else static inline int pstore_register(struct pstore_info *psi) { return -ENODEV; } static inline bool pstore_cannot_block_path(enum kmsg_dump_reason reason) { return false; } #endif #endif /*_LINUX_PSTORE_H*/