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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, |
69020eea AB |
38 | /* PPC64 partition types */ |
39 | PSTORE_TYPE_PPC_RTAS = 4, | |
f33f748c | 40 | PSTORE_TYPE_PPC_OF = 5, |
a5e4797b | 41 | PSTORE_TYPE_PPC_COMMON = 6, |
9d5438f4 | 42 | PSTORE_TYPE_PMSG = 7, |
ca01d6dd TL |
43 | PSTORE_TYPE_UNKNOWN = 255 |
44 | }; | |
45 | ||
67a101f5 AV |
46 | struct module; |
47 | ||
ca01d6dd TL |
48 | struct pstore_info { |
49 | struct module *owner; | |
50 | char *name; | |
abd4d558 | 51 | spinlock_t buf_lock; /* serialize access to 'buf' */ |
ca01d6dd TL |
52 | char *buf; |
53 | size_t bufsize; | |
f6f82851 | 54 | struct mutex read_mutex; /* serialize open/read/close */ |
df36ac1b | 55 | int flags; |
06cf91b4 CG |
56 | int (*open)(struct pstore_info *psi); |
57 | int (*close)(struct pstore_info *psi); | |
8d38d74b | 58 | ssize_t (*read)(u64 *id, enum pstore_type_id *type, |
755d4fe4 | 59 | int *count, struct timespec *time, char **buf, |
9a4e1398 | 60 | bool *compressed, struct pstore_info *psi); |
3d6d8d20 KC |
61 | int (*write)(enum pstore_type_id type, |
62 | enum kmsg_dump_reason reason, u64 *id, | |
b3b515bb | 63 | unsigned int part, int count, bool compressed, |
6bbbca73 | 64 | size_t size, struct pstore_info *psi); |
897dba02 AV |
65 | int (*write_buf)(enum pstore_type_id type, |
66 | enum kmsg_dump_reason reason, u64 *id, | |
b3b515bb | 67 | unsigned int part, const char *buf, bool compressed, |
6bbbca73 | 68 | size_t size, struct pstore_info *psi); |
56280682 | 69 | int (*erase)(enum pstore_type_id type, u64 id, |
755d4fe4 SA |
70 | int count, struct timespec time, |
71 | struct pstore_info *psi); | |
638c1fd3 | 72 | void *data; |
ca01d6dd TL |
73 | }; |
74 | ||
df36ac1b LT |
75 | #define PSTORE_FLAGS_FRAGILE 1 |
76 | ||
ca01d6dd TL |
77 | #ifdef CONFIG_PSTORE |
78 | extern int pstore_register(struct pstore_info *); | |
9f244e9c | 79 | extern bool pstore_cannot_block_path(enum kmsg_dump_reason reason); |
ca01d6dd TL |
80 | #else |
81 | static inline int | |
82 | pstore_register(struct pstore_info *psi) | |
83 | { | |
84 | return -ENODEV; | |
85 | } | |
9f244e9c SA |
86 | static inline bool |
87 | pstore_cannot_block_path(enum kmsg_dump_reason reason) | |
88 | { | |
89 | return false; | |
90 | } | |
ca01d6dd TL |
91 | #endif |
92 | ||
93 | #endif /*_LINUX_PSTORE_H*/ |