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-rw-r--r--kernel/include/linux/pstore.h94
1 files changed, 94 insertions, 0 deletions
diff --git a/kernel/include/linux/pstore.h b/kernel/include/linux/pstore.h
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+++ b/kernel/include/linux/pstore.h
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+/*
+ * 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_PMSG = 7,
+ PSTORE_TYPE_PPC_OPAL = 8,
+ 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 flags;
+ 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,
+ bool *compressed, struct pstore_info *psi);
+ int (*write)(enum pstore_type_id type,
+ enum kmsg_dump_reason reason, u64 *id,
+ unsigned int part, int count, bool compressed,
+ 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, bool compressed,
+ 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;
+};
+
+#define PSTORE_FLAGS_FRAGILE 1
+
+#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*/