Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / linux / pstore.h

diff --git a/kernel/include/linux/pstore.h b/kernel/include/linux/pstore.h
new file mode 100644 (file)
index 0000000..8e7a25b
--- /dev/null
+++ b/kernel/include/linux/pstore.h
@@ -0,0 +1,94 @@
+/*
+ * 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*/