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MFC: Only attach to a GPT partition if it has the GPT_ENT_TYPE_FREEBSD

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type.
This commit is contained in:
jhb 2007-12-18 01:32:55 +00:00
parent db94b9c1b5
commit 439521b27c
2 changed files with 29 additions and 0 deletions
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13
sys/geom/geom_bsd.c
View File

@ -55,6 +55,8 @@ __FBSDID("$FreeBSD$");
#include <sys/md5.h>
#include <sys/errno.h>
#include <sys/disklabel.h>
#include <sys/gpt.h>
#include <sys/uuid.h>
#include <geom/geom.h>
#include <geom/geom_slice.h>
@ -463,6 +465,8 @@ g_bsd_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_
* not implemented here.
*/
static struct uuid freebsd_slice = GPT_ENT_TYPE_FREEBSD;
static struct g_geom *
g_bsd_taste(struct g_class *mp, struct g_provider *pp, int flags)
{
@ -474,6 +478,7 @@ g_bsd_taste(struct g_class *mp, struct g_provider *pp, int flags)
struct g_slicer *gsp;
u_char hash[16];
MD5_CTX md5sum;
struct uuid uuid;
g_trace(G_T_TOPOLOGY, "bsd_taste(%s,%s)", mp->name, pp->name);
g_topology_assert();
@ -529,6 +534,14 @@ g_bsd_taste(struct g_class *mp, struct g_provider *pp, int flags)
break;
}
/* Same thing if we are inside a GPT */
error = g_getattr("GPT::type", cp, &uuid);
if (!error) {
if (memcmp(&uuid, &freebsd_slice, sizeof(uuid)) != 0 &&
flags == G_TF_NORMAL)
break;
}
/* Get sector size, we need it to read data. */
secsize = cp->provider->sectorsize;
if (secsize < 512)

16
sys/geom/geom_gpt.c
View File

@ -101,6 +101,22 @@ is_pmbr(char *mbr)
static int
g_gpt_start(struct bio *bp)
{
struct g_provider *pp;
struct g_geom *gp;
struct g_gpt_softc *gs;
struct g_slicer *gsp;
struct uuid uuid;
pp = bp->bio_to;
gp = pp->geom;
gsp = gp->softc;
gs = gsp->softc;
if (bp->bio_cmd == BIO_GETATTR) {
le_uuid_dec(&gs->part[pp->index]->ent_type, &uuid);
if (g_handleattr(bp, "GPT::type", &uuid, sizeof(uuid)))
return (1);
}
return (0);
}