int
sr_raid1_rw(struct sr_workunit *wu)
{
struct sr_discipline *sd = wu->swu_dis;
struct scsi_xfer *xs = wu->swu_xs;
struct sr_ccb *ccb;
struct sr_chunk *scp;
int ios, chunk, i, rt;
daddr_t blk;
/* blk and scsi error will be handled by sr_validate_io */
if (sr_validate_io(wu, &blk, "sr_raid1_rw"))
goto bad;
/* calculate physical block */
blk += sd->sd_meta->ssd_data_offset;
if (xs->flags & SCSI_DATA_IN)
ios = 1;
else
ios = sd->sd_meta->ssdi.ssd_chunk_no;
for (i = 0; i < ios; i++) {
if (xs->flags & SCSI_DATA_IN) {
rt = 0;
ragain:
/* interleave reads */
chunk = sd->mds.mdd_raid1.sr1_counter++ %
sd->sd_meta->ssdi.ssd_chunk_no;
scp = sd->sd_vol.sv_chunks[chunk];
switch (scp->src_meta.scm_status) {
case BIOC_SDONLINE:
case BIOC_SDSCRUB:
break;
case BIOC_SDOFFLINE:
case BIOC_SDREBUILD:
case BIOC_SDHOTSPARE:
if (rt++ < sd->sd_meta->ssdi.ssd_chunk_no)
goto ragain;
/* FALLTHROUGH */
default:
/* volume offline */
printf("%s: is offline, cannot read\n",
DEVNAME(sd->sd_sc));
goto bad;
}
} else {
/* writes go on all working disks */
chunk = i;
scp = sd->sd_vol.sv_chunks[chunk];
switch (scp->src_meta.scm_status) {
case BIOC_SDONLINE:
case BIOC_SDSCRUB:
case BIOC_SDREBUILD:
break;
case BIOC_SDHOTSPARE: /* should never happen */
case BIOC_SDOFFLINE:
continue;
default:
goto bad;
}
}
ccb = sr_ccb_rw(sd, chunk, blk, xs->datalen, xs->data,
xs->flags, 0);
if (!ccb) {
/* should never happen but handle more gracefully */
printf("%s: %s: too many ccbs queued\n",
DEVNAME(sd->sd_sc),
sd->sd_meta->ssd_devname);
goto bad;
}
sr_wu_enqueue_ccb(wu, ccb);
}
sr_schedule_wu(wu);
return (0);
bad:
/* wu is unwound by sr_wu_put */
return (1);
}
int
sr_raid0_rw(struct sr_workunit *wu)
{
struct sr_discipline *sd = wu->swu_dis;
struct scsi_xfer *xs = wu->swu_xs;
struct sr_ccb *ccb;
struct sr_chunk *scp;
daddr_t blkno;
int64_t chunkoffs, lbaoffs, offset, stripoffs;
int64_t strip_bits, strip_no, strip_size;
int64_t chunk, no_chunk;
int64_t length, leftover;
u_int8_t *data;
/* blkno and scsi error will be handled by sr_validate_io */
if (sr_validate_io(wu, &blkno, "sr_raid0_rw"))
goto bad;
strip_size = sd->sd_meta->ssdi.ssd_strip_size;
strip_bits = sd->mds.mdd_raid0.sr0_strip_bits;
no_chunk = sd->sd_meta->ssdi.ssd_chunk_no;
DNPRINTF(SR_D_DIS, "%s: %s: front end io: blkno %lld size %d\n",
DEVNAME(sd->sd_sc), sd->sd_meta->ssd_devname,
(long long)blkno, xs->datalen);
/* all offs are in bytes */
lbaoffs = blkno << DEV_BSHIFT;
strip_no = lbaoffs >> strip_bits;
chunk = strip_no % no_chunk;
stripoffs = lbaoffs & (strip_size - 1);
chunkoffs = (strip_no / no_chunk) << strip_bits;
offset = chunkoffs + stripoffs;
length = MIN(xs->datalen, strip_size - stripoffs);
leftover = xs->datalen;
data = xs->data;
for (;;) {
/* make sure chunk is online */
scp = sd->sd_vol.sv_chunks[chunk];
if (scp->src_meta.scm_status != BIOC_SDONLINE)
goto bad;
DNPRINTF(SR_D_DIS, "%s: %s %s io lbaoffs %lld "
"strip_no %lld chunk %lld stripoffs %lld "
"chunkoffs %lld offset %lld length %lld "
"leftover %lld data %p\n",
DEVNAME(sd->sd_sc), sd->sd_meta->ssd_devname, sd->sd_name,
lbaoffs, strip_no, chunk, stripoffs, chunkoffs, offset,
length, leftover, data);
blkno = offset >> DEV_BSHIFT;
ccb = sr_ccb_rw(sd, chunk, blkno, length, data, xs->flags, 0);
if (!ccb) {
/* should never happen but handle more gracefully */
printf("%s: %s: too many ccbs queued\n",
DEVNAME(sd->sd_sc),
sd->sd_meta->ssd_devname);
goto bad;
}
sr_wu_enqueue_ccb(wu, ccb);
leftover -= length;
if (leftover == 0)
break;
data += length;
if (++chunk > no_chunk - 1) {
chunk = 0;
offset += length;
} else if (wu->swu_io_count == 1)
offset -= stripoffs;
length = MIN(leftover,strip_size);
}
sr_schedule_wu(wu);
return (0);
bad:
/* wu is unwound by sr_wu_put */
return (1);
}
int
sr_concat_rw(struct sr_workunit *wu)
{
struct sr_discipline *sd = wu->swu_dis;
struct scsi_xfer *xs = wu->swu_xs;
struct sr_ccb *ccb;
struct sr_chunk *scp;
daddr_t blkno;
int64_t lbaoffs, offset;
int64_t no_chunk, chunkend, chunk, chunksize;
int64_t length, leftover;
u_int8_t *data;
/* blkno and scsi error will be handled by sr_validate_io */
if (sr_validate_io(wu, &blkno, "sr_concat_rw"))
goto bad;
no_chunk = sd->sd_meta->ssdi.ssd_chunk_no;
DNPRINTF(SR_D_DIS, "%s: %s: front end io: blkno %lld size %d\n",
DEVNAME(sd->sd_sc), sd->sd_meta->ssd_devname,
(long long)blkno, xs->datalen);
/* All offsets are in bytes. */
lbaoffs = blkno << DEV_BSHIFT;
leftover = xs->datalen;
data = xs->data;
for (;;) {
chunkend = 0;
offset = lbaoffs;
for (chunk = 0; chunk < no_chunk; chunk++) {
chunksize = sd->sd_vol.sv_chunks[chunk]->src_size <<
DEV_BSHIFT;
chunkend += chunksize;
if (lbaoffs < chunkend)
break;
offset -= chunksize;
}
if (lbaoffs > chunkend)
goto bad;
length = MIN(MIN(leftover, chunkend - lbaoffs), MAXPHYS);
/* make sure chunk is online */
scp = sd->sd_vol.sv_chunks[chunk];
if (scp->src_meta.scm_status != BIOC_SDONLINE)
goto bad;
DNPRINTF(SR_D_DIS, "%s: %s %s io lbaoffs %lld "
"chunk %lld chunkend %lld offset %lld length %lld "
"leftover %lld data %p\n",
DEVNAME(sd->sd_sc), sd->sd_meta->ssd_devname, sd->sd_name,
lbaoffs, chunk, chunkend, offset, length, leftover, data);
blkno = offset >> DEV_BSHIFT;
ccb = sr_ccb_rw(sd, chunk, blkno, length, data, xs->flags, 0);
if (!ccb) {
/* should never happen but handle more gracefully */
printf("%s: %s: too many ccbs queued\n",
DEVNAME(sd->sd_sc), sd->sd_meta->ssd_devname);
goto bad;
}
sr_wu_enqueue_ccb(wu, ccb);
leftover -= length;
if (leftover == 0)
break;
data += length;
lbaoffs += length;
}
sr_schedule_wu(wu);
return (0);
bad:
/* wu is unwound by sr_wu_put */
return (1);
}
