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22#ifndef _LINUX_PSTORE_H
23#define _LINUX_PSTORE_H
24
25#include <linux/time.h>
26#include <linux/kmsg_dump.h>
27#include <linux/mutex.h>
28#include <linux/types.h>
29#include <linux/spinlock.h>
30#include <linux/errno.h>
31
32
33enum pstore_type_id {
34 PSTORE_TYPE_DMESG = 0,
35 PSTORE_TYPE_MCE = 1,
36 PSTORE_TYPE_CONSOLE = 2,
37 PSTORE_TYPE_FTRACE = 3,
38 PSTORE_TYPE_UNKNOWN = 255
39};
40
41struct module;
42
43struct pstore_info {
44 struct module *owner;
45 char *name;
46 spinlock_t buf_lock;
47 char *buf;
48 size_t bufsize;
49 struct mutex read_mutex;
50 int (*open)(struct pstore_info *psi);
51 int (*close)(struct pstore_info *psi);
52 ssize_t (*read)(u64 *id, enum pstore_type_id *type,
53 int *count, struct timespec *time, char **buf,
54 struct pstore_info *psi);
55 int (*write)(enum pstore_type_id type,
56 enum kmsg_dump_reason reason, u64 *id,
57 unsigned int part, int count, size_t size,
58 struct pstore_info *psi);
59 int (*write_buf)(enum pstore_type_id type,
60 enum kmsg_dump_reason reason, u64 *id,
61 unsigned int part, const char *buf, size_t size,
62 struct pstore_info *psi);
63 int (*erase)(enum pstore_type_id type, u64 id,
64 int count, struct timespec time,
65 struct pstore_info *psi);
66 void *data;
67};
68
69#ifdef CONFIG_PSTORE
70extern int pstore_register(struct pstore_info *);
71extern bool pstore_cannot_block_path(enum kmsg_dump_reason reason);
72#else
73static inline int
74pstore_register(struct pstore_info *psi)
75{
76 return -ENODEV;
77}
78static inline bool
79pstore_cannot_block_path(enum kmsg_dump_reason reason)
80{
81 return false;
82}
83#endif
84
85#endif
86