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79d955af71
The ramoops can be configured to enable each pstore type by setting their size. In that case, it'd be better not to register disabled types in the first place. Cc: Anton Vorontsov <anton@enomsg.org> Cc: Colin Cross <ccross@android.com> Cc: Kees Cook <keescook@chromium.org> Cc: Tony Luck <tony.luck@intel.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Kees Cook <keescook@chromium.org>
88 lines
2.7 KiB
C
88 lines
2.7 KiB
C
/*
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* Persistent Storage - pstore.h
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*
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* Copyright (C) 2010 Intel Corporation <tony.luck@intel.com>
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*
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* This code is the generic layer to export data records from platform
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* level persistent storage via a file system.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _LINUX_PSTORE_H
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#define _LINUX_PSTORE_H
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#include <linux/time.h>
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#include <linux/kmsg_dump.h>
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#include <linux/mutex.h>
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#include <linux/types.h>
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#include <linux/spinlock.h>
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#include <linux/errno.h>
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/* types */
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enum pstore_type_id {
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PSTORE_TYPE_DMESG = 0,
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PSTORE_TYPE_MCE = 1,
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PSTORE_TYPE_CONSOLE = 2,
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PSTORE_TYPE_FTRACE = 3,
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/* PPC64 partition types */
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PSTORE_TYPE_PPC_RTAS = 4,
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PSTORE_TYPE_PPC_OF = 5,
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PSTORE_TYPE_PPC_COMMON = 6,
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PSTORE_TYPE_PMSG = 7,
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PSTORE_TYPE_PPC_OPAL = 8,
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PSTORE_TYPE_UNKNOWN = 255
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};
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struct module;
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struct pstore_info {
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struct module *owner;
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char *name;
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spinlock_t buf_lock; /* serialize access to 'buf' */
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char *buf;
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size_t bufsize;
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struct mutex read_mutex; /* serialize open/read/close */
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int flags;
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int (*open)(struct pstore_info *psi);
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int (*close)(struct pstore_info *psi);
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ssize_t (*read)(u64 *id, enum pstore_type_id *type,
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int *count, struct timespec *time, char **buf,
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bool *compressed, ssize_t *ecc_notice_size,
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struct pstore_info *psi);
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int (*write)(enum pstore_type_id type,
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enum kmsg_dump_reason reason, u64 *id,
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unsigned int part, int count, bool compressed,
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size_t size, struct pstore_info *psi);
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int (*write_buf)(enum pstore_type_id type,
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enum kmsg_dump_reason reason, u64 *id,
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unsigned int part, const char *buf, bool compressed,
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size_t size, struct pstore_info *psi);
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int (*erase)(enum pstore_type_id type, u64 id,
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int count, struct timespec time,
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struct pstore_info *psi);
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void *data;
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};
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#define PSTORE_FLAGS_DMESG (1 << 0)
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#define PSTORE_FLAGS_FRAGILE PSTORE_FLAGS_DMESG
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#define PSTORE_FLAGS_CONSOLE (1 << 1)
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#define PSTORE_FLAGS_FTRACE (1 << 2)
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#define PSTORE_FLAGS_PMSG (1 << 3)
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extern int pstore_register(struct pstore_info *);
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extern void pstore_unregister(struct pstore_info *);
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extern bool pstore_cannot_block_path(enum kmsg_dump_reason reason);
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#endif /*_LINUX_PSTORE_H*/
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