6f87be981b
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
87 lines
3.6 KiB
C
87 lines
3.6 KiB
C
/*-
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* Copyright (c) 1998,1999,2000,2001,2002 Søren Schmidt <sos@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer,
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* without modification, immediately at the beginning of the file.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/* structure describing an ATA disk request */
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struct ad_request {
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struct ad_softc *softc; /* ptr to parent device */
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u_int32_t blockaddr; /* block number */
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u_int32_t bytecount; /* bytes to transfer */
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u_int32_t donecount; /* bytes transferred */
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u_int32_t currentsize; /* size of current transfer */
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struct callout_handle timeout_handle; /* handle for untimeout */
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int retries; /* retry count */
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int flags;
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#define ADR_F_READ 0x0001
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#define ADR_F_ERROR 0x0002
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#define ADR_F_DMA_USED 0x0004
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#define ADR_F_QUEUED 0x0008
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#define ADR_F_FORCE_PIO 0x0010
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caddr_t data; /* pointer to data buf */
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struct bio *bp; /* associated bio ptr */
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u_int8_t tag; /* tag ID of this request */
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int serv; /* request had service */
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struct ata_dmaentry *dmatab; /* DMA transfer table */
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TAILQ_ENTRY(ad_request) chain; /* list management */
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};
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/* structure describing an ATA disk */
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struct ad_softc {
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struct ata_device *device; /* ptr to device softc */
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int lun; /* logical unit number */
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u_int64_t total_secs; /* total # of sectors (LBA) */
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u_int8_t heads;
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u_int8_t sectors;
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u_int32_t transfersize; /* size of each transfer */
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int num_tags; /* number of tags supported */
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int flags; /* drive flags */
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#define AD_F_LABELLING 0x0001
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#define AD_F_CHS_USED 0x0002
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#define AD_F_32B_ENABLED 0x0004
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#define AD_F_TAG_ENABLED 0x0008
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#define AD_F_RAID_SUBDISK 0x0010
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struct ad_request *tags[32]; /* tag array of requests */
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int outstanding; /* tags not serviced yet */
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struct bio_queue_head queue; /* head of request queue */
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struct devstat stats; /* devstat entry */
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struct disk disk; /* disklabel/slice stuff */
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dev_t dev; /* device place holder */
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};
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void ad_attach(struct ata_device *);
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void ad_detach(struct ata_device *, int);
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void ad_reinit(struct ata_device *);
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void ad_start(struct ata_device *);
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int ad_transfer(struct ad_request *);
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int ad_interrupt(struct ad_request *);
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int ad_service(struct ad_softc *, int);
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void ad_print(struct ad_softc *);
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