mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-20 03:04:01 +08:00
9a4e139820
Backends will set the flag 'compressed' after reading the log from persistent store to indicate the data being returned to pstore is compressed or not. Signed-off-by: Aruna Balakrishnaiah <aruna@linux.vnet.ibm.com> Reviewed-by: Kees Cook <keescook@chromium.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
90 lines
2.6 KiB
C
90 lines
2.6 KiB
C
/*
|
|
* Persistent Storage - pstore.h
|
|
*
|
|
* Copyright (C) 2010 Intel Corporation <tony.luck@intel.com>
|
|
*
|
|
* This code is the generic layer to export data records from platform
|
|
* level persistent storage via a file system.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
#ifndef _LINUX_PSTORE_H
|
|
#define _LINUX_PSTORE_H
|
|
|
|
#include <linux/time.h>
|
|
#include <linux/kmsg_dump.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/types.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/errno.h>
|
|
|
|
/* types */
|
|
enum pstore_type_id {
|
|
PSTORE_TYPE_DMESG = 0,
|
|
PSTORE_TYPE_MCE = 1,
|
|
PSTORE_TYPE_CONSOLE = 2,
|
|
PSTORE_TYPE_FTRACE = 3,
|
|
/* PPC64 partition types */
|
|
PSTORE_TYPE_PPC_RTAS = 4,
|
|
PSTORE_TYPE_PPC_OF = 5,
|
|
PSTORE_TYPE_PPC_COMMON = 6,
|
|
PSTORE_TYPE_UNKNOWN = 255
|
|
};
|
|
|
|
struct module;
|
|
|
|
struct pstore_info {
|
|
struct module *owner;
|
|
char *name;
|
|
spinlock_t buf_lock; /* serialize access to 'buf' */
|
|
char *buf;
|
|
size_t bufsize;
|
|
struct mutex read_mutex; /* serialize open/read/close */
|
|
int (*open)(struct pstore_info *psi);
|
|
int (*close)(struct pstore_info *psi);
|
|
ssize_t (*read)(u64 *id, enum pstore_type_id *type,
|
|
int *count, struct timespec *time, char **buf,
|
|
bool *compressed, struct pstore_info *psi);
|
|
int (*write)(enum pstore_type_id type,
|
|
enum kmsg_dump_reason reason, u64 *id,
|
|
unsigned int part, int count, bool compressed,
|
|
size_t size, struct pstore_info *psi);
|
|
int (*write_buf)(enum pstore_type_id type,
|
|
enum kmsg_dump_reason reason, u64 *id,
|
|
unsigned int part, const char *buf, bool compressed,
|
|
size_t size, struct pstore_info *psi);
|
|
int (*erase)(enum pstore_type_id type, u64 id,
|
|
int count, struct timespec time,
|
|
struct pstore_info *psi);
|
|
void *data;
|
|
};
|
|
|
|
#ifdef CONFIG_PSTORE
|
|
extern int pstore_register(struct pstore_info *);
|
|
extern bool pstore_cannot_block_path(enum kmsg_dump_reason reason);
|
|
#else
|
|
static inline int
|
|
pstore_register(struct pstore_info *psi)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
static inline bool
|
|
pstore_cannot_block_path(enum kmsg_dump_reason reason)
|
|
{
|
|
return false;
|
|
}
|
|
#endif
|
|
|
|
#endif /*_LINUX_PSTORE_H*/
|