mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-27 22:51:31 +00:00
34327e9fd2
Support backend for ftrace. To enable ftrace backend, just make ftrace_size be greater than 0 and a multiple of 4096. Signed-off-by: WeiXiong Liao <liaoweixiong@allwinnertech.com> Link: https://lore.kernel.org/lkml/20200511233229.27745-6-keescook@chromium.org/ Co-developed-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Colin Ian King <colin.king@canonical.com> Link: https://lore.kernel.org/lkml/20200512170719.221514-1-colin.king@canonical.com Signed-off-by: Kees Cook <keescook@chromium.org>
50 lines
1.8 KiB
C
50 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
|
|
#ifndef __PSTORE_ZONE_H_
|
|
#define __PSTORE_ZONE_H_
|
|
|
|
#include <linux/types.h>
|
|
|
|
typedef ssize_t (*pstore_zone_read_op)(char *, size_t, loff_t);
|
|
typedef ssize_t (*pstore_zone_write_op)(const char *, size_t, loff_t);
|
|
/**
|
|
* 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
|
|
* means error.
|
|
* @write: The same as @read, but -EBUSY means try to write again later.
|
|
* @panic_write:The write operation only used for panic case. It's optional
|
|
* if you do not care panic log. The parameters and return value
|
|
* are the same as @read.
|
|
*/
|
|
struct pstore_zone_info {
|
|
struct module *owner;
|
|
const char *name;
|
|
|
|
unsigned long total_size;
|
|
unsigned long kmsg_size;
|
|
int max_reason;
|
|
unsigned long pmsg_size;
|
|
unsigned long console_size;
|
|
unsigned long ftrace_size;
|
|
pstore_zone_read_op read;
|
|
pstore_zone_write_op write;
|
|
pstore_zone_write_op panic_write;
|
|
};
|
|
|
|
extern int register_pstore_zone(struct pstore_zone_info *info);
|
|
extern void unregister_pstore_zone(struct pstore_zone_info *info);
|
|
|
|
#endif
|