mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-06 02:24:14 +08:00
26fecbf760
While kmsg_bytes can be set for pstore via mount, if a crash occurs before the mount only partial console log will be stored as kmsg_bytes defaults to a potentially different hardcoded value in the kernel (PSTORE_DEFAULT_KMSG_BYTES). This makes it impossible to analyze valuable post-mortem data especially on the embedded development or in the process of bringing up new boards. Change this value to be a Kconfig option with the default of old PSTORE_DEFAULT_KMSG_BYTES Signed-off-by: Vasile-Laurentiu Stanimir <vasile-laurentiu.stanimir@windriver.com> Signed-off-by: Kees Cook <keescook@chromium.org>
53 lines
1.5 KiB
C
53 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef __PSTORE_INTERNAL_H__
|
|
#define __PSTORE_INTERNAL_H__
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/time.h>
|
|
#include <linux/pstore.h>
|
|
|
|
extern unsigned long kmsg_bytes;
|
|
|
|
#ifdef CONFIG_PSTORE_FTRACE
|
|
extern void pstore_register_ftrace(void);
|
|
extern void pstore_unregister_ftrace(void);
|
|
ssize_t pstore_ftrace_combine_log(char **dest_log, size_t *dest_log_size,
|
|
const char *src_log, size_t src_log_size);
|
|
#else
|
|
static inline void pstore_register_ftrace(void) {}
|
|
static inline void pstore_unregister_ftrace(void) {}
|
|
static inline ssize_t
|
|
pstore_ftrace_combine_log(char **dest_log, size_t *dest_log_size,
|
|
const char *src_log, size_t src_log_size)
|
|
{
|
|
*dest_log_size = 0;
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_PSTORE_PMSG
|
|
extern void pstore_register_pmsg(void);
|
|
extern void pstore_unregister_pmsg(void);
|
|
#else
|
|
static inline void pstore_register_pmsg(void) {}
|
|
static inline void pstore_unregister_pmsg(void) {}
|
|
#endif
|
|
|
|
extern struct pstore_info *psinfo;
|
|
|
|
extern void pstore_set_kmsg_bytes(int);
|
|
extern void pstore_get_records(int);
|
|
extern void pstore_get_backend_records(struct pstore_info *psi,
|
|
struct dentry *root, int quiet);
|
|
extern int pstore_put_backend_records(struct pstore_info *psi);
|
|
extern int pstore_mkfile(struct dentry *root,
|
|
struct pstore_record *record);
|
|
extern void pstore_record_init(struct pstore_record *record,
|
|
struct pstore_info *psi);
|
|
|
|
/* Called during pstore init/exit. */
|
|
int __init pstore_init_fs(void);
|
|
void __exit pstore_exit_fs(void);
|
|
|
|
#endif
|