ffcf681ee3
struct disk_sectoralign {
/* First aligned sector number. */
uint32_t dsa_firstaligned;
/* Number of sectors per aligned unit. */
uint32_t dsa_alignment;
};
- Teach wd(4) to get it from ATA.
- Teach cgd(4) to pass it through from the underlying disk.
- Teach dk(4) to pass it through with adjustments.
- Teach zpool (zfs) to take advantage of it.
=> XXX zpool doesn't seem to understand when the vdev's starting
sector is misaligned.
Missing:
- ccd(4) and raidframe(4) support -- these should support _using_
DIOCGSECTORALIGN to decide where to start putting ccd or raid
stripes on disk, and these should perhaps _implement_
DIOCGSECTORALIGN by reporting the stripe/interleave factor.
- sd(4) support -- I don't know any obvious way to get it from SCSI,
but if any SCSI wizards know better than I, please feel free to
teach sd(4) about it!
- any ld(4) attachments -- might be worth teaching the ld drivers for
nvme and various raid controllers to get the aligned sector size
There's some duplicate logic here for now. I'm doing it this way,
rather than gathering the logic into a new disklabel_sectoralign
function or something, so that this change is limited to adding a new
ioctl, without any new kernel symbols, in order to make it easy to
pull up to netbsd-9 without worrying about the module ABI.
96 lines
3.4 KiB
C
96 lines
3.4 KiB
C
/* $NetBSD: wdvar.h,v 1.50 2020/03/02 16:01:56 riastradh Exp $ */
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/*
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* Copyright (c) 1998, 2001 Manuel Bouyer.
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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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* 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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*
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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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#ifndef _DEV_ATA_WDVAR_H_
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#define _DEV_ATA_WDVAR_H_
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#ifdef _KERNEL_OPT
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#include "opt_wd.h"
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#endif
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#include <dev/dkvar.h>
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#include <sys/sysctl.h>
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struct wd_softc {
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/* General disk infos */
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struct dk_softc sc_dksc;
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kmutex_t sc_lock;
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int sc_quirks; /* any quirks drive might have */
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/* IDE disk soft states */
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struct ata_drive_datas *drvp; /* Our controller's infos */
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const struct ata_bustype *atabus;
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struct ataparams sc_params;/* drive characteristics found */
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int sc_flags;
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/*
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* XXX Nothing resets this yet, but disk change sensing will when ATA-4 is
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* more fully implemented.
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*/
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#define WDF_LOADED 0x010 /* parameters loaded */
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#define WDF_WAIT 0x020 /* waiting for resources */
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#define WDF_LBA 0x040 /* using LBA mode */
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#define WDF_LBA48 0x100 /* using 48-bit LBA mode */
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#define WDF_DIRTY 0x200 /* disk cache dirty */
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#define WDF_OPEN 0x400 /* device is open */
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uint64_t sc_capacity; /* full capacity of the device */
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uint64_t sc_capacity512; /* ... in DEV_BSIZE blocks */
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uint32_t sc_capacity28; /* capacity accessible with LBA28 commands */
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uint32_t sc_blksize; /* logical block size, in bytes */
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struct disk_sectoralign sc_sectoralign; /* sector alignment */
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#ifdef WD_SOFTBADSECT
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SLIST_HEAD(, disk_badsectors) sc_bslist;
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u_int sc_bscount;
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#endif
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/* Retry/requeue failed transfers */
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SLIST_HEAD(, ata_xfer) sc_retry_list;
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struct callout sc_retry_callout; /* retry callout handle */
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struct callout sc_restart_diskqueue; /* restart queue processing */
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SLIST_HEAD(, ata_xfer) sc_requeue_list;
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struct callout sc_requeue_callout; /* requeue callout handle */
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struct ata_xfer dump_xfer;
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/* Sysctl nodes specific for the disk */
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struct sysctllog *nodelog;
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bool drv_ncq;
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#define WD_USE_NCQ(wd) \
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((wd)->drv_ncq && ((wd)->drvp->drive_flags & ATA_DRIVE_NCQ))
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bool drv_ncq_prio;
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#define WD_USE_NCQ_PRIO(wd) \
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((wd)->drv_ncq_prio && ((wd)->drvp->drive_flags & ATA_DRIVE_NCQ_PRIO))
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#ifdef WD_CHAOS_MONKEY
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int drv_chaos_freq; /* frequency of simulated bio errors */
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int drv_chaos_cnt; /* count of processed bio read xfers */
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#endif
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unsigned inflight;
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char *sc_typename;
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};
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#endif /* _DEV_ATA_WDVAR_H_ */
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