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ca01d6dd TL |
1 | /* |
2 | * Persistent Storage - pstore.h | |
3 | * | |
4 | * Copyright (C) 2010 Intel Corporation <tony.luck@intel.com> | |
5 | * | |
6 | * This code is the generic layer to export data records from platform | |
7 | * level persistent storage via a file system. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | */ | |
22 | #ifndef _LINUX_PSTORE_H | |
23 | #define _LINUX_PSTORE_H | |
24 | ||
3d6d8d20 KC |
25 | #include <linux/time.h> |
26 | #include <linux/kmsg_dump.h> | |
67a101f5 AV |
27 | #include <linux/mutex.h> |
28 | #include <linux/types.h> | |
29 | #include <linux/spinlock.h> | |
30 | #include <linux/errno.h> | |
3d6d8d20 | 31 | |
ca01d6dd TL |
32 | /* types */ |
33 | enum pstore_type_id { | |
34 | PSTORE_TYPE_DMESG = 0, | |
35 | PSTORE_TYPE_MCE = 1, | |
f29e5956 | 36 | PSTORE_TYPE_CONSOLE = 2, |
060287b8 | 37 | PSTORE_TYPE_FTRACE = 3, |
ca01d6dd TL |
38 | PSTORE_TYPE_UNKNOWN = 255 |
39 | }; | |
40 | ||
67a101f5 AV |
41 | struct module; |
42 | ||
ca01d6dd TL |
43 | struct pstore_info { |
44 | struct module *owner; | |
45 | char *name; | |
abd4d558 | 46 | spinlock_t buf_lock; /* serialize access to 'buf' */ |
ca01d6dd TL |
47 | char *buf; |
48 | size_t bufsize; | |
f6f82851 | 49 | struct mutex read_mutex; /* serialize open/read/close */ |
06cf91b4 CG |
50 | int (*open)(struct pstore_info *psi); |
51 | int (*close)(struct pstore_info *psi); | |
8d38d74b | 52 | ssize_t (*read)(u64 *id, enum pstore_type_id *type, |
755d4fe4 | 53 | int *count, struct timespec *time, char **buf, |
f6f82851 | 54 | struct pstore_info *psi); |
3d6d8d20 KC |
55 | int (*write)(enum pstore_type_id type, |
56 | enum kmsg_dump_reason reason, u64 *id, | |
755d4fe4 SA |
57 | unsigned int part, int count, size_t size, |
58 | struct pstore_info *psi); | |
897dba02 AV |
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); | |
56280682 | 63 | int (*erase)(enum pstore_type_id type, u64 id, |
755d4fe4 SA |
64 | int count, struct timespec time, |
65 | struct pstore_info *psi); | |
638c1fd3 | 66 | void *data; |
ca01d6dd TL |
67 | }; |
68 | ||
69 | #ifdef CONFIG_PSTORE | |
70 | extern int pstore_register(struct pstore_info *); | |
9f244e9c | 71 | extern bool pstore_cannot_block_path(enum kmsg_dump_reason reason); |
ca01d6dd TL |
72 | #else |
73 | static inline int | |
74 | pstore_register(struct pstore_info *psi) | |
75 | { | |
76 | return -ENODEV; | |
77 | } | |
9f244e9c SA |
78 | static inline bool |
79 | pstore_cannot_block_path(enum kmsg_dump_reason reason) | |
80 | { | |
81 | return false; | |
82 | } | |
ca01d6dd TL |
83 | #endif |
84 | ||
85 | #endif /*_LINUX_PSTORE_H*/ |