static int
g_uzip_request(struct g_geom *gp, struct bio *bp)
{
struct g_uzip_softc *sc;
struct bio *bp2;
struct g_consumer *cp;
struct g_provider *pp;
off_t ofs, start_blk_ofs;
size_t i, start_blk, end_blk, zsize;
if (g_uzip_cached(gp, bp) != 0)
return (1);
sc = gp->softc;
cp = LIST_FIRST(&gp->consumer);
pp = cp->provider;
ofs = bp->bio_offset + bp->bio_completed;
start_blk = ofs / sc->blksz;
KASSERT(start_blk < sc->nblocks, ("start_blk out of range"));
end_blk = howmany(ofs + bp->bio_resid, sc->blksz);
KASSERT(end_blk <= sc->nblocks, ("end_blk out of range"));
for (; BLK_IS_NIL(sc, start_blk) && start_blk < end_blk; start_blk++) {
/* Fill in any leading Nil blocks */
start_blk_ofs = ofs % sc->blksz;
zsize = MIN(sc->blksz - start_blk_ofs, bp->bio_resid);
DPRINTF_BLK(GUZ_DBG_IO, start_blk, ("%s/%s: %p/%ju: "
"filling %ju zero bytes\n", __func__, gp->name, gp,
(uintmax_t)bp->bio_completed, (uintmax_t)zsize));
bzero(bp->bio_data + bp->bio_completed, zsize);
bp->bio_completed += zsize;
bp->bio_resid -= zsize;
ofs += zsize;
}
if (start_blk == end_blk) {
KASSERT(bp->bio_resid == 0, ("bp->bio_resid is invalid"));
/*
* No non-Nil data is left, complete request immediately.
*/
DPRINTF(GUZ_DBG_IO, ("%s/%s: %p: all done returning %ju "
"bytes\n", __func__, gp->name, gp,
(uintmax_t)bp->bio_completed));
g_io_deliver(bp, 0);
return (1);
}
for (i = start_blk + 1; i < end_blk; i++) {
/* Trim discontinuous areas if any */
if (!BLK_IS_CONT(sc, i)) {
end_blk = i;
break;
}
}
DPRINTF_BRNG(GUZ_DBG_IO, start_blk, end_blk, ("%s/%s: %p: "
"start=%u (%ju), end=%u (%ju)\n", __func__, gp->name, bp,
(u_int)start_blk, (uintmax_t)sc->toc[start_blk].offset,
(u_int)end_blk, (uintmax_t)BLK_ENDS(sc, end_blk - 1)));
bp2 = g_clone_bio(bp);
if (bp2 == NULL) {
g_io_deliver(bp, ENOMEM);
return (1);
}
bp2->bio_done = g_uzip_read_done;
bp2->bio_offset = TOFF_2_BOFF(sc, pp, start_blk);
while (1) {
bp2->bio_length = TLEN_2_BLEN(sc, pp, bp2, end_blk - 1);
if (bp2->bio_length <= MAXPHYS)
break;
if (end_blk == (start_blk + 1)) {
break;
}
end_blk--;
}
DPRINTF(GUZ_DBG_IO, ("%s/%s: bp2->bio_length = %jd\n",
__func__, gp->name, (intmax_t)bp2->bio_length));
bp2->bio_data = malloc(bp2->bio_length, M_GEOM_UZIP, M_NOWAIT);
if (bp2->bio_data == NULL) {
g_destroy_bio(bp2);
g_io_deliver(bp, ENOMEM);
return (1);
}
DPRINTF_BRNG(GUZ_DBG_IO, start_blk, end_blk, ("%s/%s: %p: "
"reading %jd bytes from offset %jd\n", __func__, gp->name, bp,
(intmax_t)bp2->bio_length, (intmax_t)bp2->bio_offset));
g_io_request(bp2, cp);
return (0);
}
static int
g_uzip_request(struct g_geom *gp, struct bio *bp)
{
struct g_uzip_softc *sc;
struct bio *bp2;
struct g_consumer *cp;
struct g_provider *pp;
off_t ofs;
size_t start_blk, end_blk;
if (g_uzip_cached(gp, bp) != 0)
return (1);
sc = gp->softc;
bp2 = g_clone_bio(bp);
if (bp2 == NULL) {
g_io_deliver(bp, ENOMEM);
return (1);
}
bp2->bio_done = g_uzip_done;
cp = LIST_FIRST(&gp->consumer);
pp = cp->provider;
ofs = bp->bio_offset + bp->bio_completed;
start_blk = ofs / sc->blksz;
KASSERT(start_blk < sc->nblocks, ("start_blk out of range"));
end_blk = (ofs + bp->bio_resid + sc->blksz - 1) / sc->blksz;
KASSERT(end_blk <= sc->nblocks, ("end_blk out of range"));
DPRINTF(("%s/%s: %p: start=%u (%jd), end=%u (%jd)\n",
__func__, gp->name, bp,
(u_int)start_blk, (intmax_t)sc->offsets[start_blk],
(u_int)end_blk, (intmax_t)sc->offsets[end_blk]));
bp2->bio_offset = sc->offsets[start_blk] -
sc->offsets[start_blk] % pp->sectorsize;
while (1) {
bp2->bio_length = sc->offsets[end_blk] - bp2->bio_offset;
bp2->bio_length = (bp2->bio_length + pp->sectorsize - 1) /
pp->sectorsize * pp->sectorsize;
if (bp2->bio_length <= MAXPHYS)
break;
end_blk--;
}
bp2->bio_data = malloc(bp2->bio_length, M_GEOM_UZIP, M_NOWAIT);
if (bp2->bio_data == NULL) {
g_destroy_bio(bp2);
g_io_deliver(bp, ENOMEM);
return (1);
}
DPRINTF(("%s/%s: %p: reading %jd bytes from offset %jd\n",
__func__, gp->name, bp,
(intmax_t)bp2->bio_length, (intmax_t)bp2->bio_offset));
g_io_request(bp2, cp);
return (0);
}
