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freebsd-skq/sys/dev/ata/ata-raid.h
Søren Schmidt 6f87be981b Major update of the ATA RAID code, part 3: 
Add code to properly detach/attach disks that are part of a RAID.

Mark a disk that is attached on an ATA channel belonging to a
RAID as a spare disk that can be used for rebuilding failed RAID1's.

Add support for rebuilding failed RAID1's.

Several fixes to the detach/attach code.

For replacing a disk in a failed RAID1 do the following:

Find the controller channel# of the failed disk.

Exec 'atacontrol detach <channel#>' to free the disk from the system.

Replace the failed disk with a new one of at least the same size.
If your have your disks in drawers/enclosures this can be done with
the system still running.

Exec 'atacontrol attach <channel#>' to add the disk to the system and
mark it as a valid spare for rebuild.

Exec 'atacontrol rebuild <array#>'

The system will rebuild the array on the fly, the array can still
be used during this, although with slower performance.

Please let me know of any problems with this!

Sponsored by: Advanis Inc.

MFC after: 2 weeks
2002-03-03 15:36:21 +00:00

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/*-
* Copyright (c) 2000,2001,2002 Søren Schmidt <sos@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer,
* without modification, immediately at the beginning of the file.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
struct ar_disk {
struct ata_device *device;
u_int64_t disk_sectors; /* sectors on this disk */
off_t last_lba; /* last lba used */
int flags;
#define AR_DF_PRESENT 0x00000001
#define AR_DF_ASSIGNED 0x00000002
#define AR_DF_SPARE 0x00000004
#define AR_DF_ONLINE 0x00000008
};
#define MAX_ARRAYS 16
#define MAX_DISKS 16
#define AR_PROXIMITY 2048
struct ar_softc {
int lun;
int32_t magic_0; /* ident for this array */
int32_t magic_1; /* ident for this array */
int flags;
#define AR_F_RAID0 0x0001 /* STRIPE */
#define AR_F_RAID1 0x0002 /* MIRROR */
#define AR_F_SPAN 0x0004 /* SPAN */
#define AR_F_READY 0x0100
#define AR_F_DEGRADED 0x0200
#define AR_F_REBUILDING 0x0400
#define AR_F_PROMISE_RAID 0x1000
#define AR_F_HIGHPOINT_RAID 0x2000
int total_disks; /* number of disks in this array */
int generation; /* generation of this array */
struct ar_disk disks[MAX_DISKS+1]; /* ptr to each disk in array */
int width; /* array width in disks */
u_int16_t heads;
u_int16_t sectors;
u_int32_t cylinders;
u_int64_t total_sectors;
int interleave; /* interleave in bytes */
int reserved; /* sectors that are NOT to be used */
int offset; /* offset from start of disk */
u_int64_t lock_start; /* start of locked area for rebuild */
u_int64_t lock_end; /* end of locked area for rebuild */
struct disk disk; /* disklabel/slice stuff */
dev_t dev; /* device place holder */
};
struct ar_buf {
struct bio bp;
struct bio *org;
struct ar_buf *mirror;
int drive;
int flags;
#define AB_F_DONE 0x01
};
#define HPT_LBA 9
struct highpoint_raid_conf {
int8_t filler1[32];
u_int32_t magic; /* 0x20 */
#define HPT_MAGIC_OK 0x5a7816f0
#define HPT_MAGIC_BAD 0x5a7816fd
u_int32_t magic_0;
u_int32_t magic_1;
u_int32_t order;
#define HPT_O_DOWN 0x00
#define HPT_O_RAID01DEGRADED 0x01
#define HPT_O_RAID01DST 0x02
#define HPT_O_RAID01SRC 0x03
#define HPT_O_READY 0x04
u_int8_t array_width;
u_int8_t stripe_shift;
u_int8_t type;
#define HPT_T_RAID0 0x00
#define HPT_T_RAID1 0x01
#define HPT_T_RAID01_RAID0 0x02
#define HPT_T_SPAN 0x03
#define HPT_T_RAID_3 0x04
#define HPT_T_RAID_5 0x05
#define HPT_T_SINGLEDISK 0x06
#define HPT_T_RAID01_RAID1 0x07
u_int8_t disk_number;
u_int32_t total_sectors;
u_int32_t disk_mode;
u_int32_t boot_mode;
u_int8_t boot_disk;
u_int8_t boot_protect;
u_int8_t error_log_entries;
u_int8_t error_log_index;
struct {
u_int32_t timestamp;
u_int8_t reason;
#define HPT_R_REMOVED 0xfe
#define HPT_R_BROKEN 0xff
u_int8_t disk;
u_int8_t status;
u_int8_t sectors;
u_int32_t lba;
} errorlog[32];
int8_t filler2[60];
} __attribute__((packed));
#define PR_LBA(adp) \
(((adp->total_secs / (adp->heads * adp->sectors)) * \
adp->heads * adp->sectors) - adp->sectors)
struct promise_raid_conf {
char promise_id[24];
#define PR_MAGIC "Promise Technology, Inc."
u_int32_t dummy_0;
u_int64_t magic_0;
#define PR_MAGIC0(x) ((u_int64_t)x.device->channel->unit << 48) | \
((u_int64_t)(x.device->unit != 0) << 56)
u_int16_t magic_1;
u_int32_t magic_2;
u_int8_t filler1[470];
struct {
u_int32_t integrity; /* 0x200 */
#define PR_I_VALID 0x00000080
u_int8_t flags;
#define PR_F_VALID 0x00000001
#define PR_F_ONLINE 0x00000002
#define PR_F_ASSIGNED 0x00000004
#define PR_F_SPARE 0x00000008
#define PR_F_DUPLICATE 0x00000010
#define PR_F_REDIR 0x00000020
#define PR_F_DOWN 0x00000040
#define PR_F_READY 0x00000080
u_int8_t disk_number;
u_int8_t channel;
u_int8_t device;
u_int64_t magic_0;
u_int32_t disk_offset; /* 0x210 */
u_int32_t disk_sectors;
u_int32_t rebuild_lba;
u_int16_t generation;
u_int8_t status;
#define PR_S_VALID 0x01
#define PR_S_ONLINE 0x02
#define PR_S_INITED 0x04
#define PR_S_READY 0x08
#define PR_S_DEGRADED 0x10
#define PR_S_MARKED 0x20
#define PR_S_FUNCTIONAL 0x80
u_int8_t type;
#define PR_T_RAID0 0x00
#define PR_T_RAID1 0x01
#define PR_T_RAID3 0x02
#define PR_T_RAID5 0x04
#define PR_T_SPAN 0x08
u_int8_t total_disks; /* 0x220 */
u_int8_t stripe_shift;
u_int8_t array_width;
u_int8_t array_number;
u_int32_t total_sectors;
u_int16_t cylinders;
u_int8_t heads;
u_int8_t sectors;
int64_t magic_1;
struct { /* 0x240 */
u_int8_t flags;
u_int8_t dummy_0;
u_int8_t channel;
u_int8_t device;
u_int64_t magic_0;
} disk[8];
} raid;
int32_t filler2[346];
u_int32_t checksum;
} __attribute__((packed));
int ata_raiddisk_probe(struct ad_softc *);
int ata_raiddisk_attach(struct ad_softc *);
int ata_raiddisk_detach(struct ad_softc *);
void ata_raid_attach(void);
int ata_raid_rebuild(int);
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