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Add support for dumping kernel to gconcat.

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Dumping goes to the component, where dump partition begins.
This commit is contained in:
Alexander Motin 2010-09-16 17:24:25 +00:00
parent 4e6571599b
commit 659f684ea0
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=212754
1 changed files with 38 additions and 0 deletions
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38
sys/geom/concat/g_concat.c
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@ -211,6 +211,39 @@ g_concat_access(struct g_provider *pp, int dr, int dw, int de)
return (error);
}
static void
g_concat_kernel_dump(struct bio *bp)
{
struct g_concat_softc *sc;
struct g_concat_disk *disk;
struct bio *cbp;
struct g_kerneldump *gkd;
u_int i;
sc = bp->bio_to->geom->softc;
gkd = (struct g_kerneldump *)bp->bio_data;
for (i = 0; i < sc->sc_ndisks; i++) {
if (sc->sc_disks[i].d_start <= gkd->offset &&
sc->sc_disks[i].d_end > gkd->offset)
break;
}
if (i == sc->sc_ndisks)
g_io_deliver(bp, EOPNOTSUPP);
disk = &sc->sc_disks[i];
gkd->offset -= disk->d_start;
if (gkd->length > disk->d_end - disk->d_start - gkd->offset)
gkd->length = disk->d_end - disk->d_start - gkd->offset;
cbp = g_clone_bio(bp);
if (cbp == NULL) {
g_io_deliver(bp, ENOMEM);
return;
}
cbp->bio_done = g_std_done;
g_io_request(cbp, disk->d_consumer);
G_CONCAT_DEBUG(1, "Kernel dump will go to %s.",
disk->d_consumer->provider->name);
}
static void
g_concat_flush(struct g_concat_softc *sc, struct bio *bp)
{
@ -280,7 +313,12 @@ g_concat_start(struct bio *bp)
g_concat_flush(sc, bp);
return;
case BIO_GETATTR:
if (strcmp("GEOM::kerneldump", bp->bio_attribute) == 0) {
g_concat_kernel_dump(bp);
return;
}
/* To which provider it should be delivered? */
/* FALLTHROUGH */
default:
g_io_deliver(bp, EOPNOTSUPP);
return;