1 /* SPDX-License-Identifier: GPL-2.0 */
2
3 #ifndef __PSTORE_BLK_H_
4 #define __PSTORE_BLK_H_
5
6 #include <linux/types.h>
7 #include <linux/pstore.h>
8 #include <linux/pstore_zone.h>
9
10 /**
11 * struct pstore_device_info - back-end pstore/blk driver structure.
12 *
13 * @flags: Refer to macro starting with PSTORE_FLAGS defined in
14 * linux/pstore.h. It means what front-ends this device support.
15 * Zero means all backends for compatible.
16 * @zone: The struct pstore_zone_info details.
17 *
18 */
19 struct pstore_device_info {
20 unsigned int flags;
21 struct pstore_zone_info zone;
22 };
23
24 int register_pstore_device(struct pstore_device_info *dev);
25 void unregister_pstore_device(struct pstore_device_info *dev);
26
27 /**
28 * struct pstore_blk_config - the pstore_blk backend configuration
29 *
30 * @device: Name of the desired block device
31 * @max_reason: Maximum kmsg dump reason to store to block device
32 * @kmsg_size: Total size of for kmsg dumps
33 * @pmsg_size: Total size of the pmsg storage area
34 * @console_size: Total size of the console storage area
35 * @ftrace_size: Total size for ftrace logging data (for all CPUs)
36 */
37 struct pstore_blk_config {
38 char device[80];
39 enum kmsg_dump_reason max_reason;
40 unsigned long kmsg_size;
41 unsigned long pmsg_size;
42 unsigned long console_size;
43 unsigned long ftrace_size;
44 };
45
46 /**
47 * pstore_blk_get_config - get a copy of the pstore_blk backend configuration
48 *
49 * @info: The sturct pstore_blk_config to be filled in
50 *
51 * Failure returns negative error code, and success returns 0.
52 */
53 int pstore_blk_get_config(struct pstore_blk_config *info);
54
55 #endif
56
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