sd_pcu.h revision fcf3ce441efd61da9bb2884968af01cb7c1452cc
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _SD_PCU_H
#define _SD_PCU_H
/*
* All structures here are on-disk, unless specified otherwise.
* In-core stuff is hidden inside implementation modules.
*/
#ifdef __cplusplus
extern "C" {
#endif
/*
* Header.
*/
#define SDBC_PWF_MAGIC 0xbcbcbc01
typedef struct sdbc_pwf_hdr_s {
int32_t magic; /* magic number to distinguish file revs */
int32_t alignment; /* all sections are multiples of this */
/* a cache block is this identical size */
int32_t bmap_size; /* number of entries in each bitmap entry */
int32_t cd_count; /* number of devices we have data for */
nsc_off_t string_pool; /* offset in file to pool of filenames */
nsc_off_t descriptor_pool; /* offset in file to dbc_pwf_desc_t vector */
int64_t dump_time; /* Timestamp == longest time_t */
} sdbc_pwf_hdr_t;
/*
* File description
*/
typedef struct sdbc_pwf_desc_s {
int32_t pad0;
uint32_t name; /* name + stringpool == offset of filename */
/* the name given to nsc_open */
nsc_off_t blocks; /* offset into swap for this device's data */
nsc_off_t bitmaps; /* offset into swap for data bitmaps */
/* (i.e. nothing to do with rdc bitmaps */
uint64_t nblocks; /* number of data blocks == bitmap dimension */
/* long rdc_data; */ /* offset to rdc data (NYI) */
} sdbc_pwf_desc_t;
/*
* record status section - describes the state of each cache block in the file
*
* zaitcev - XXX errs is per block, not per fba?
*/
typedef struct sdbc_pwf_rec_s {
uint32_t dirty; /* Bitmap of dirty fba'a (_sd_bitmap_t) */
int32_t errs; /* error status per fba, needed to recover */
/* from errors to a raidset where we must recover */
/* from a stripe write error */
/* (i.e. parity is bad or suspect ) */
nsc_off_t fba_num; /* the block on the disk */
} sdbc_pwf_rec_t;
typedef struct sdbc_pwf_bitmap_s {
sdbc_pwf_rec_t bitmaps[1]; /* dynamic array based on cache block size */
} sdbc_pwf_bitmap_t;
/*
* Prototypes
*/
#ifdef _KERNEL /* XXX Split into sd_pcu_ondisk.h, sd_pcu_iface.h */
extern char _sdbc_shutdown_in_progress;
extern int _sdbc_pcu_config(int c, char **v);
extern void _sdbc_pcu_unload(void);
extern void _sdbc_power_lost(int rideout);
extern void _sdbc_power_ok(void);
extern void _sdbc_power_down(void);
#endif
#ifdef __cplusplus
}
#endif
#endif /* _SD_PCU_H */