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Implement d_discard for dk. This closes PR 47940.

This commit is contained in:
dholland 2014-07-25 08:23:56 +00:00
parent 7c5b45490e
commit 890e036b3c
1 changed files with 25 additions and 4 deletions
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29
sys/dev/dkwedge/dk.c
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@ -1,4 +1,4 @@
/* $NetBSD: dk.c,v 1.71 2014/07/25 08:10:36 dholland Exp $ */
/* $NetBSD: dk.c,v 1.72 2014/07/25 08:23:56 dholland Exp $ */
/*-
* Copyright (c) 2004, 2005, 2006, 2007 The NetBSD Foundation, Inc.
@ -30,7 +30,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: dk.c,v 1.71 2014/07/25 08:10:36 dholland Exp $");
__KERNEL_RCSID(0, "$NetBSD: dk.c,v 1.72 2014/07/25 08:23:56 dholland Exp $");
#ifdef _KERNEL_OPT
#include "opt_dkwedge.h"
@ -108,6 +108,7 @@ static dev_type_ioctl(dkioctl);
static dev_type_strategy(dkstrategy);
static dev_type_dump(dkdump);
static dev_type_size(dksize);
static dev_type_discard(dkdiscard);
const struct bdevsw dk_bdevsw = {
.d_open = dkopen,
@ -116,7 +117,7 @@ const struct bdevsw dk_bdevsw = {
.d_ioctl = dkioctl,
.d_dump = dkdump,
.d_psize = dksize,
.d_discard = nodiscard,
.d_discard = dkdiscard,
.d_flag = D_DISK
};
@ -131,7 +132,7 @@ const struct cdevsw dk_cdevsw = {
.d_poll = nopoll,
.d_mmap = nommap,
.d_kqfilter = nokqfilter,
.d_discard = nodiscard,
.d_discard = dkdiscard,
.d_flag = D_DISK
};
@ -1340,6 +1341,26 @@ dkioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l)
return (error);
}
/*
* dkdiscard: [devsw entry point]
*
* Perform a discard-range request on a wedge.
*/
static int
dkdiscard(dev_t dev, off_t pos, off_t len)
{
struct dkwedge_softc *sc = dkwedge_lookup(dev);
if (sc == NULL)
return (ENODEV);
if (sc->sc_state != DKW_STATE_RUNNING)
return (ENXIO);
if (sc->sc_parent->dk_rawvp == NULL)
return (ENXIO);
return VOP_FDISCARD(sc->sc_parent->dk_rawvp, pos, len);
}
/*
* dksize: [devsw entry point]
*