/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __PSTORE_ZONE_H_ #define __PSTORE_ZONE_H_ #include <linux/types.h> pstore_zone_read_op; pstore_zone_write_op; pstore_zone_erase_op; /** * struct pstore_zone_info - pstore/zone back-end driver structure * * @owner: Module which is responsible for this back-end driver. * @name: Name of the back-end driver. * @total_size: The total size in bytes pstore/zone can use. It must be greater * than 4096 and be multiple of 4096. * @kmsg_size: The size of oops/panic zone. Zero means disabled, otherwise, * it must be multiple of SECTOR_SIZE(512 Bytes). * @max_reason: Maximum kmsg dump reason to store. * @pmsg_size: The size of pmsg zone which is the same as @kmsg_size. * @console_size:The size of console zone which is the same as @kmsg_size. * @ftrace_size:The size of ftrace zone which is the same as @kmsg_size. * @read: The general read operation. Both of the function parameters * @size and @offset are relative value to storage. * On success, the number of bytes should be returned, others * mean error. * @write: The same as @read, but the following error number: * -EBUSY means try to write again later. * -ENOMSG means to try next zone. * @erase: The general erase operation for device with special removing * job. Both of the function parameters @size and @offset are * relative value to storage. * Return 0 on success and others on failure. * @panic_write:The write operation only used for panic case. It's optional * if you do not care panic log. The parameters are relative * value to storage. * On success, the number of bytes should be returned, others * excluding -ENOMSG mean error. -ENOMSG means to try next zone. */ struct pstore_zone_info { … }; extern int register_pstore_zone(struct pstore_zone_info *info); extern void unregister_pstore_zone(struct pstore_zone_info *info); #endif
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