linux-stable/fs/pstore/internal.h
Vasile-Laurentiu Stanimir 26fecbf760 pstore: Move kmsg_bytes default into Kconfig
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>
2020-12-01 12:09:17 -08:00

52 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