include/linux/pstore_blk.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002
0003 #ifndef __PSTORE_BLK_H_
0004 #define __PSTORE_BLK_H_
0005
0006 #include <linux/types.h>
0007 #include <linux/pstore.h>
0008 #include <linux/pstore_zone.h>
0009
0010 /**
0011  * struct pstore_device_info - back-end pstore/blk driver structure.
0012  *
0013  * @flags:  Refer to macro starting with PSTORE_FLAGS defined in
0014  *      linux/pstore.h. It means what front-ends this device support.
0015  *      Zero means all backends for compatible.
0016  * @zone:   The struct pstore_zone_info details.
0017  *
0018  */
0019 struct pstore_device_info {
0020     unsigned int flags;
0021     struct pstore_zone_info zone;
0022 };
0023
0024 int  register_pstore_device(struct pstore_device_info *dev);
0025 void unregister_pstore_device(struct pstore_device_info *dev);
0026
0027 /**
0028  * struct pstore_blk_config - the pstore_blk backend configuration
0029  *
0030  * @device:     Name of the desired block device
0031  * @max_reason:     Maximum kmsg dump reason to store to block device
0032  * @kmsg_size:      Total size of for kmsg dumps
0033  * @pmsg_size:      Total size of the pmsg storage area
0034  * @console_size:   Total size of the console storage area
0035  * @ftrace_size:    Total size for ftrace logging data (for all CPUs)
0036  */
0037 struct pstore_blk_config {
0038     char device[80];
0039     enum kmsg_dump_reason max_reason;
0040     unsigned long kmsg_size;
0041     unsigned long pmsg_size;
0042     unsigned long console_size;
0043     unsigned long ftrace_size;
0044 };
0045
0046 /**
0047  * pstore_blk_get_config - get a copy of the pstore_blk backend configuration
0048  *
0049  * @info:   The sturct pstore_blk_config to be filled in
0050  *
0051  * Failure returns negative error code, and success returns 0.
0052  */
0053 int pstore_blk_get_config(struct pstore_blk_config *info);
0054
0055 #endif