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add support for DIOCGSTRATEGY and DIOCGCACHE 

only allow DIOCCACHESYNC if open for writing, same as everything supporting
DIOCCACHESYNC
This commit is contained in:
jdolecek 2020-04-10 10:53:02 +00:00
parent 3be80bd65b
commit 5806327a2a
1 changed files with 22 additions and 2 deletions
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24
sys/dev/vnd.c
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@ -1,4 +1,4 @@
/* $NetBSD: vnd.c,v 1.274 2020/02/23 15:46:39 ad Exp $ */
/* $NetBSD: vnd.c,v 1.275 2020/04/10 10:53:02 jdolecek Exp $ */
/*-
* Copyright (c) 1996, 1997, 1998, 2008, 2020 The NetBSD Foundation, Inc.
@ -91,7 +91,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: vnd.c,v 1.274 2020/02/23 15:46:39 ad Exp $");
__KERNEL_RCSID(0, "$NetBSD: vnd.c,v 1.275 2020/04/10 10:53:02 jdolecek Exp $");
#if defined(_KERNEL_OPT)
#include "opt_vnd.h"
@ -1216,6 +1216,7 @@ vndioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l)
#endif
case DIOCKLABEL:
case DIOCWLABEL:
case DIOCCACHESYNC:
if ((flag & FWRITE) == 0)
return EBADF;
}
@ -1231,6 +1232,8 @@ vndioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l)
case DIOCKLABEL:
case DIOCWLABEL:
case DIOCGDEFLABEL:
case DIOCGCACHE:
case DIOCGSTRATEGY:
case DIOCCACHESYNC:
#ifdef __HAVE_OLD_DISKLABEL
case ODIOCGDINFO:
@ -1645,6 +1648,23 @@ unlock_and_exit:
break;
#endif
case DIOCGSTRATEGY:
{
struct disk_strategy *dks = (void *)data;
/* No lock needed, never changed */
strlcpy(dks->dks_name,
bufq_getstrategyname(vnd->sc_tab),
sizeof(dks->dks_name));
dks->dks_paramlen = 0;
break;
}
case DIOCGCACHE:
{
int *bits = (int *)data;
*bits |= DKCACHE_READ | DKCACHE_WRITE;
break;
}
case DIOCCACHESYNC:
vn_lock(vnd->sc_vp, LK_EXCLUSIVE | LK_RETRY);
error = VOP_FSYNC(vnd->sc_vp, vnd->sc_cred,