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autodiscover wedges

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This commit is contained in:
mlelstv 2012-06-09 06:20:45 +00:00
parent d1c48dff5a
commit b416153514
1 changed files with 34 additions and 17 deletions
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51
sys/dev/vnd.c
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@ -1,4 +1,4 @@
/* $NetBSD: vnd.c,v 1.220 2012/03/26 16:28:08 hannken Exp $ */
/* $NetBSD: vnd.c,v 1.221 2012/06/09 06:20:45 mlelstv Exp $ */
/*-
* Copyright (c) 1996, 1997, 1998, 2008 The NetBSD Foundation, Inc.
@ -91,7 +91,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: vnd.c,v 1.220 2012/03/26 16:28:08 hannken Exp $");
__KERNEL_RCSID(0, "$NetBSD: vnd.c,v 1.221 2012/06/09 06:20:45 mlelstv Exp $");
#if defined(_KERNEL_OPT)
#include "opt_vnd.h"
@ -332,15 +332,31 @@ vndopen(dev_t dev, int flags, int mode, struct lwp *l)
part = DISKPART(dev);
pmask = (1 << part);
/*
* If we're initialized, check to see if there are any other
* open partitions. If not, then it's safe to update the
* in-core disklabel. Only read the disklabel if it is
* not already valid.
*/
if ((sc->sc_flags & (VNF_INITED|VNF_VLABEL)) == VNF_INITED &&
sc->sc_dkdev.dk_openmask == 0)
vndgetdisklabel(dev, sc);
if (sc->sc_dkdev.dk_nwedges != 0 && part != RAW_PART) {
error = EBUSY;
goto done;
}
if (sc->sc_flags & VNF_INITED) {
if ((sc->sc_dkdev.dk_openmask & ~(1<<RAW_PART)) != 0) {
/*
* If any non-raw partition is open, but the disk
* has been invalidated, disallow further opens.
*/
if ((sc->sc_flags & VNF_VLABEL) == 0) {
error = EIO;
goto done;
}
} else {
/*
* Load the partition info if not already loaded.
*/
if ((sc->sc_flags & VNF_VLABEL) == 0) {
sc->sc_flags |= VNF_VLABEL;
vndgetdisklabel(dev, sc);
}
}
}
/* Check that the partitions exists. */
if (part != RAW_PART) {
@ -968,6 +984,9 @@ vnddoclear(struct vnd_softc *vnd, int pmask, int minor, bool force)
return EBUSY;
}
/* Delete all of our wedges */
dkwedge_delall(&vnd->sc_dkdev);
/*
* XXX vndclear() might call vndclose() implicitly;
* release lock to avoid recursion
@ -1320,12 +1339,13 @@ vndioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l)
pool_init(&vnd->sc_vxpool, sizeof(struct vndxfer), 0,
0, 0, "vndxpl", NULL, IPL_BIO);
/* Try and read the disklabel. */
vndgetdisklabel(dev, vnd);
vndunlock(vnd);
pathbuf_destroy(pb);
/* Discover wedges on this disk */
dkwedge_discover(&vnd->sc_dkdev);
break;
close_and_exit:
@ -1827,9 +1847,6 @@ vndgetdisklabel(dev_t dev, struct vnd_softc *sc)
lp->d_npartitions = MAXPARTITIONS;
lp->d_checksum = dkcksum(lp);
}
/* In-core label now valid. */
sc->sc_flags |= VNF_VLABEL;
}
/*