2 * Persistent Storage - pstore.h
4 * Copyright (C) 2010 Intel Corporation <tony.luck@intel.com>
6 * This code is the generic layer to export data records from platform
7 * level persistent storage via a file system.
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.
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.
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
22 #ifndef _LINUX_PSTORE_H
23 #define _LINUX_PSTORE_H
25 #include <linux/time.h>
26 #include <linux/kmsg_dump.h>
27 #include <linux/mutex.h>
28 #include <linux/types.h>
29 #include <linux/spinlock.h>
30 #include <linux/errno.h>
34 PSTORE_TYPE_DMESG
= 0,
36 PSTORE_TYPE_CONSOLE
= 2,
37 PSTORE_TYPE_FTRACE
= 3,
38 PSTORE_TYPE_UNKNOWN
= 255
46 spinlock_t buf_lock
; /* serialize access to 'buf' */
49 struct mutex read_mutex
; /* serialize open/read/close */
50 int (*open
)(struct pstore_info
*psi
);
51 int (*close
)(struct pstore_info
*psi
);
52 ssize_t (*read
)(u64
*id
, enum pstore_type_id
*type
,
53 int *count
, struct timespec
*time
, char **buf
,
54 struct pstore_info
*psi
);
55 int (*write
)(enum pstore_type_id type
,
56 enum kmsg_dump_reason reason
, u64
*id
,
57 unsigned int part
, int count
, size_t size
,
58 struct pstore_info
*psi
);
59 int (*write_buf
)(enum pstore_type_id type
,
60 enum kmsg_dump_reason reason
, u64
*id
,
61 unsigned int part
, const char *buf
, size_t size
,
62 struct pstore_info
*psi
);
63 int (*erase
)(enum pstore_type_id type
, u64 id
,
64 int count
, struct timespec time
,
65 struct pstore_info
*psi
);
70 extern int pstore_register(struct pstore_info
*);
71 extern bool pstore_cannot_block_path(enum kmsg_dump_reason reason
);
74 pstore_register(struct pstore_info
*psi
)
79 pstore_cannot_block_path(enum kmsg_dump_reason reason
)
85 #endif /*_LINUX_PSTORE_H*/
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