Edit File: kmsg_dump.h
/* * linux/include/kmsg_dump.h * * Copyright (C) 2009 Net Insight AB * * Author: Simon Kagstrom <simon.kagstrom@netinsight.net> * * This file is subject to the terms and conditions of the GNU General Public * License. See the file COPYING in the main directory of this archive * for more details. */ #ifndef _LINUX_KMSG_DUMP_H #define _LINUX_KMSG_DUMP_H #include <linux/errno.h> #include <linux/list.h> /* * Keep this list arranged in rough order of priority. Anything listed after * KMSG_DUMP_OOPS will not be logged by default unless printk.always_kmsg_dump * is passed to the kernel. */ enum kmsg_dump_reason { KMSG_DUMP_UNDEF, KMSG_DUMP_PANIC, KMSG_DUMP_OOPS, KMSG_DUMP_EMERG, KMSG_DUMP_RESTART, KMSG_DUMP_HALT, KMSG_DUMP_POWEROFF, }; /** * struct kmsg_dumper - kernel crash message dumper structure * @list: Entry in the dumper list (private) * @dump: Call into dumping code which will retrieve the data with * through the record iterator * @max_reason: filter for highest reason number that should be dumped * @registered: Flag that specifies if this is already registered */ struct kmsg_dumper { struct list_head list; void (*dump)(struct kmsg_dumper *dumper, enum kmsg_dump_reason reason); enum kmsg_dump_reason max_reason; bool active; bool registered; /* private state of the kmsg iterator */ u32 cur_idx; u32 next_idx; u64 cur_seq; u64 next_seq; }; #ifdef CONFIG_PRINTK void kmsg_dump(enum kmsg_dump_reason reason); bool kmsg_dump_get_line_nolock(struct kmsg_dumper *dumper, bool syslog, char *line, size_t size, size_t *len); bool kmsg_dump_get_line(struct kmsg_dumper *dumper, bool syslog, char *line, size_t size, size_t *len); bool kmsg_dump_get_buffer(struct kmsg_dumper *dumper, bool syslog, char *buf, size_t size, size_t *len); void kmsg_dump_rewind_nolock(struct kmsg_dumper *dumper); void kmsg_dump_rewind(struct kmsg_dumper *dumper); int kmsg_dump_register(struct kmsg_dumper *dumper); int kmsg_dump_unregister(struct kmsg_dumper *dumper); #else static inline void kmsg_dump(enum kmsg_dump_reason reason) { } static inline bool kmsg_dump_get_line_nolock(struct kmsg_dumper *dumper, bool syslog, const char *line, size_t size, size_t *len) { return false; } static inline bool kmsg_dump_get_line(struct kmsg_dumper *dumper, bool syslog, const char *line, size_t size, size_t *len) { return false; } static inline bool kmsg_dump_get_buffer(struct kmsg_dumper *dumper, bool syslog, char *buf, size_t size, size_t *len) { return false; } static inline void kmsg_dump_rewind_nolock(struct kmsg_dumper *dumper) { } static inline void kmsg_dump_rewind(struct kmsg_dumper *dumper) { } static inline int kmsg_dump_register(struct kmsg_dumper *dumper) { return -EINVAL; } static inline int kmsg_dump_unregister(struct kmsg_dumper *dumper) { return -EINVAL; } #endif #endif /* _LINUX_KMSG_DUMP_H */