include/linux/pstore_blk.h

   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