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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
39 PSTORE_TYPE_PPC_RTAS = 4,
40 PSTORE_TYPE_PPC_OF = 5,
41 PSTORE_TYPE_PPC_COMMON = 6,
42 PSTORE_TYPE_PMSG = 7,
43 PSTORE_TYPE_PPC_OPAL = 8,
44 PSTORE_TYPE_UNKNOWN = 255
45};
46
47struct module;
48
49struct pstore_info {
50 struct module *owner;
51 char *name;
52 spinlock_t buf_lock;
53 char *buf;
54 size_t bufsize;
55 struct mutex read_mutex;
56 int flags;
57 int (*open)(struct pstore_info *psi);
58 int (*close)(struct pstore_info *psi);
59 ssize_t (*read)(u64 *id, enum pstore_type_id *type,
60 int *count, struct timespec *time, char **buf,
61 bool *compressed, struct pstore_info *psi);
62 int (*write)(enum pstore_type_id type,
63 enum kmsg_dump_reason reason, u64 *id,
64 unsigned int part, int count, bool compressed,
65 size_t size, struct pstore_info *psi);
66 int (*write_buf)(enum pstore_type_id type,
67 enum kmsg_dump_reason reason, u64 *id,
68 unsigned int part, const char *buf, bool compressed,
69 size_t size, struct pstore_info *psi);
70 int (*erase)(enum pstore_type_id type, u64 id,
71 int count, struct timespec time,
72 struct pstore_info *psi);
73 void *data;
74};
75
76#define PSTORE_FLAGS_FRAGILE 1
77
78extern int pstore_register(struct pstore_info *);
79extern void pstore_unregister(struct pstore_info *);
80extern bool pstore_cannot_block_path(enum kmsg_dump_reason reason);
81
82#endif
83