Author: mav
Date: Mon Oct 29 18:04:38 2012
New Revision: 242323
URL: http://svn.freebsd.org/changeset/base/242323
Log:
Add basic BIO_DELETE support to GEOM RAID class for all RAID levels.
If at least one subdisk in the volume supports it, BIO_DELETE requests
will be propagated down. Unfortunatelly, for RAID levels with redundancy
unmapped blocks will be mapped back during first rebuild/resync process.
Sponsored by: iXsystems, Inc.
MFC after: 1 month
Modified:
head/sys/geom/raid/g_raid.c
head/sys/geom/raid/g_raid.h
head/sys/geom/raid/md_ddf.c
head/sys/geom/raid/md_intel.c
head/sys/geom/raid/md_jmicron.c
head/sys/geom/raid/md_nvidia.c
head/sys/geom/raid/md_promise.c
head/sys/geom/raid/md_sii.c
head/sys/geom/raid/tr_concat.c
head/sys/geom/raid/tr_raid0.c
head/sys/geom/raid/tr_raid1.c
head/sys/geom/raid/tr_raid1e.c
Modified: head/sys/geom/raid/g_raid.c
==============================================================================
--- head/sys/geom/raid/g_raid.c Mon Oct 29 17:52:43 2012 (r242322)
+++ head/sys/geom/raid/g_raid.c Mon Oct 29 18:04:38 2012 (r242323)
@@ -499,6 +499,34 @@ g_raid_get_diskname(struct g_raid_disk *
}
void
+g_raid_get_disk_info(struct g_raid_disk *disk)
+{
+ struct g_consumer *cp = disk->d_consumer;
+ int error, len;
+
+ /* Read kernel dumping information. */
+ disk->d_kd.offset = 0;
+ disk->d_kd.length = OFF_MAX;
+ len = sizeof(disk->d_kd);
+ error = g_io_getattr("GEOM::kerneldump", cp, &len, &disk->d_kd);
+ if (error)
+ disk->d_kd.di.dumper = NULL;
+ if (disk->d_kd.di.dumper == NULL)
+ G_RAID_DEBUG1(2, disk->d_softc,
+ "Dumping not supported by %s: %d.",
+ cp->provider->name, error);
+
+ /* Read BIO_DELETE support. */
+ error = g_getattr("GEOM::candelete", cp, &disk->d_candelete);
+ if (error)
+ disk->d_candelete = 0;
+ if (!disk->d_candelete)
+ G_RAID_DEBUG1(2, disk->d_softc,
+ "BIO_DELETE not supported by %s: %d.",
+ cp->provider->name, error);
+}
+
+void
g_raid_report_disk_state(struct g_raid_disk *disk)
{
struct g_raid_subdisk *sd;
@@ -1052,6 +1080,31 @@ g_raid_kerneldump(struct g_raid_softc *s
}
static void
+g_raid_candelete(struct g_raid_softc *sc, struct bio *bp)
+{
+ struct g_provider *pp;
+ struct g_raid_volume *vol;
+ struct g_raid_subdisk *sd;
+ int *val;
+ int i;
+
+ val = (int *)bp->bio_data;
+ pp = bp->bio_to;
+ vol = pp->private;
+ *val = 0;
+ for (i = 0; i < vol->v_disks_count; i++) {
+ sd = &vol->v_subdisks[i];
+ if (sd->sd_state == G_RAID_SUBDISK_S_NONE)
+ continue;
+ if (sd->sd_disk->d_candelete) {
+ *val = 1;
+ break;
+ }
+ }
+ g_io_deliver(bp, 0);
+}
+
+static void
g_raid_start(struct bio *bp)
{
struct g_raid_softc *sc;
@@ -1073,7 +1126,9 @@ g_raid_start(struct bio *bp)
case BIO_FLUSH:
break;
case BIO_GETATTR:
- if (!strcmp(bp->bio_attribute, "GEOM::kerneldump"))
+ if (!strcmp(bp->bio_attribute, "GEOM::candelete"))
+ g_raid_candelete(sc, bp);
+ else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump"))
g_raid_kerneldump(sc, bp);
else
g_io_deliver(bp, EOPNOTSUPP);
Modified: head/sys/geom/raid/g_raid.h
==============================================================================
--- head/sys/geom/raid/g_raid.h Mon Oct 29 17:52:43 2012 (r242322)
+++ head/sys/geom/raid/g_raid.h Mon Oct 29 18:04:38 2012 (r242323)
@@ -153,6 +153,7 @@ struct g_raid_disk {
struct g_consumer *d_consumer; /* GEOM disk consumer. */
void *d_md_data; /* Disk's metadata storage. */
struct g_kerneldump d_kd; /* Kernel dumping method/args.
*/
+ int d_candelete; /* BIO_DELETE supported. */
uint64_t d_flags; /* Additional flags. */
u_int d_state; /* Disk state. */
u_int d_load; /* Disk average load. */
@@ -418,6 +419,7 @@ struct g_raid_volume * g_raid_create_vol
const char *name, int id);
struct g_raid_disk * g_raid_create_disk(struct g_raid_softc *sc);
const char * g_raid_get_diskname(struct g_raid_disk *disk);
+void g_raid_get_disk_info(struct g_raid_disk *disk);
int g_raid_start_volume(struct g_raid_volume *vol);
Modified: head/sys/geom/raid/md_ddf.c
==============================================================================
--- head/sys/geom/raid/md_ddf.c Mon Oct 29 17:52:43 2012 (r242322)
+++ head/sys/geom/raid/md_ddf.c Mon Oct 29 18:04:38 2012 (r242323)
@@ -2087,7 +2087,7 @@ g_raid_md_taste_ddf(struct g_raid_md_obj
struct g_raid_md_ddf_perdisk *pd;
struct g_raid_md_ddf_object *mdi;
struct g_geom *geom;
- int error, result, len, be;
+ int error, result, be;
char name[16];
G_RAID_DEBUG(1, "Tasting DDF on %s", cp->provider->name);
@@ -2154,14 +2154,7 @@ g_raid_md_taste_ddf(struct g_raid_md_obj
disk->d_consumer = rcp;
rcp->private = disk;
- /* Read kernel dumping information. */
- disk->d_kd.offset = 0;
- disk->d_kd.length = OFF_MAX;
- len = sizeof(disk->d_kd);
- error = g_io_getattr("GEOM::kerneldump", rcp, &len, &disk->d_kd);
- if (disk->d_kd.di.dumper == NULL)
- G_RAID_DEBUG1(2, sc, "Dumping not supported by %s: %d.",
- rcp->provider->name, error);
+ g_raid_get_disk_info(disk);
g_raid_md_ddf_new_disk(disk);
@@ -2348,15 +2341,7 @@ g_raid_md_ctl_ddf(struct g_raid_md_objec
ddf_meta_update(&mdi->mdio_meta, &pd->pd_meta);
g_topology_unlock();
- /* Read kernel dumping information. */
- disk->d_kd.offset = 0;
- disk->d_kd.length = OFF_MAX;
- len = sizeof(disk->d_kd);
- g_io_getattr("GEOM::kerneldump", cp, &len, &disk->d_kd);
- if (disk->d_kd.di.dumper == NULL)
- G_RAID_DEBUG1(2, sc,
- "Dumping not supported by %s.",
- cp->provider->name);
+ g_raid_get_disk_info(disk);
/* Reserve some space for metadata. */
size = MIN(size, GET64(&pd->pd_meta,
@@ -2675,15 +2660,7 @@ g_raid_md_ctl_ddf(struct g_raid_md_objec
disk->d_md_data = (void *)pd;
cp->private = disk;
- /* Read kernel dumping information. */
- disk->d_kd.offset = 0;
- disk->d_kd.length = OFF_MAX;
- len = sizeof(disk->d_kd);
- g_io_getattr("GEOM::kerneldump", cp, &len, &disk->d_kd);
- if (disk->d_kd.di.dumper == NULL)
- G_RAID_DEBUG1(2, sc,
- "Dumping not supported by %s.",
- cp->provider->name);
+ g_raid_get_disk_info(disk);
/* Welcome the "new" disk. */
g_raid_change_disk_state(disk, G_RAID_DISK_S_SPARE);
Modified: head/sys/geom/raid/md_intel.c
==============================================================================
--- head/sys/geom/raid/md_intel.c Mon Oct 29 17:52:43 2012
(r242322)
+++ head/sys/geom/raid/md_intel.c Mon Oct 29 18:04:38 2012
(r242323)
@@ -1369,14 +1369,7 @@ search:
disk->d_consumer = rcp;
rcp->private = disk;
- /* Read kernel dumping information. */
- disk->d_kd.offset = 0;
- disk->d_kd.length = OFF_MAX;
- len = sizeof(disk->d_kd);
- error = g_io_getattr("GEOM::kerneldump", rcp, &len, &disk->d_kd);
- if (disk->d_kd.di.dumper == NULL)
- G_RAID_DEBUG1(2, sc, "Dumping not supported by %s: %d.",
- rcp->provider->name, error);
+ g_raid_get_disk_info(disk);
g_raid_md_intel_new_disk(disk);
@@ -1556,15 +1549,7 @@ g_raid_md_ctl_intel(struct g_raid_md_obj
break;
}
- /* Read kernel dumping information. */
- disk->d_kd.offset = 0;
- disk->d_kd.length = OFF_MAX;
- len = sizeof(disk->d_kd);
- g_io_getattr("GEOM::kerneldump", cp, &len, &disk->d_kd);
- if (disk->d_kd.di.dumper == NULL)
- G_RAID_DEBUG1(2, sc,
- "Dumping not supported by %s.",
- cp->provider->name);
+ g_raid_get_disk_info(disk);
intel_set_disk_sectors(&pd->pd_disk_meta,
pp->mediasize / pp->sectorsize);
@@ -2080,15 +2065,7 @@ g_raid_md_ctl_intel(struct g_raid_md_obj
disk->d_md_data = (void *)pd;
cp->private = disk;
- /* Read kernel dumping information. */
- disk->d_kd.offset = 0;
- disk->d_kd.length = OFF_MAX;
- len = sizeof(disk->d_kd);
- g_io_getattr("GEOM::kerneldump", cp, &len, &disk->d_kd);
- if (disk->d_kd.di.dumper == NULL)
- G_RAID_DEBUG1(2, sc,
- "Dumping not supported by %s.",
- cp->provider->name);
+ g_raid_get_disk_info(disk);
memcpy(&pd->pd_disk_meta.serial[0], &serial[0],
INTEL_SERIAL_LEN);
Modified: head/sys/geom/raid/md_jmicron.c
==============================================================================
--- head/sys/geom/raid/md_jmicron.c Mon Oct 29 17:52:43 2012
(r242322)
+++ head/sys/geom/raid/md_jmicron.c Mon Oct 29 18:04:38 2012
(r242323)
@@ -826,7 +826,7 @@ g_raid_md_taste_jmicron(struct g_raid_md
struct jmicron_raid_conf *meta;
struct g_raid_md_jmicron_perdisk *pd;
struct g_geom *geom;
- int error, disk_pos, result, spare, len;
+ int disk_pos, result, spare, len;
char name[16];
uint16_t vendor;
@@ -945,14 +945,7 @@ search:
disk->d_consumer = rcp;
rcp->private = disk;
- /* Read kernel dumping information. */
- disk->d_kd.offset = 0;
- disk->d_kd.length = OFF_MAX;
- len = sizeof(disk->d_kd);
- error = g_io_getattr("GEOM::kerneldump", rcp, &len, &disk->d_kd);
- if (disk->d_kd.di.dumper == NULL)
- G_RAID_DEBUG1(2, sc, "Dumping not supported by %s: %d.",
- rcp->provider->name, error);
+ g_raid_get_disk_info(disk);
g_raid_md_jmicron_new_disk(disk);
@@ -1115,15 +1108,7 @@ g_raid_md_ctl_jmicron(struct g_raid_md_o
cp->private = disk;
g_topology_unlock();
- /* Read kernel dumping information. */
- disk->d_kd.offset = 0;
- disk->d_kd.length = OFF_MAX;
- len = sizeof(disk->d_kd);
- g_io_getattr("GEOM::kerneldump", cp, &len, &disk->d_kd);
- if (disk->d_kd.di.dumper == NULL)
- G_RAID_DEBUG1(2, sc,
- "Dumping not supported by %s.",
- cp->provider->name);
+ g_raid_get_disk_info(disk);
pd->pd_disk_size = pp->mediasize;
if (size > pp->mediasize)
@@ -1374,15 +1359,7 @@ g_raid_md_ctl_jmicron(struct g_raid_md_o
cp->private = disk;
g_topology_unlock();
- /* Read kernel dumping information. */
- disk->d_kd.offset = 0;
- disk->d_kd.length = OFF_MAX;
- len = sizeof(disk->d_kd);
- g_io_getattr("GEOM::kerneldump", cp, &len, &disk->d_kd);
- if (disk->d_kd.di.dumper == NULL)
- G_RAID_DEBUG1(2, sc,
- "Dumping not supported by %s.",
- cp->provider->name);
+ g_raid_get_disk_info(disk);
/* Welcome the "new" disk. */
update += g_raid_md_jmicron_start_disk(disk);
Modified: head/sys/geom/raid/md_nvidia.c
==============================================================================
--- head/sys/geom/raid/md_nvidia.c Mon Oct 29 17:52:43 2012
(r242322)
+++ head/sys/geom/raid/md_nvidia.c Mon Oct 29 18:04:38 2012
(r242323)
@@ -830,7 +830,7 @@ g_raid_md_taste_nvidia(struct g_raid_md_
struct nvidia_raid_conf *meta;
struct g_raid_md_nvidia_perdisk *pd;
struct g_geom *geom;
- int error, result, spare, len;
+ int result, spare, len;
char name[32];
uint16_t vendor;
@@ -939,14 +939,7 @@ search:
disk->d_consumer = rcp;
rcp->private = disk;
- /* Read kernel dumping information. */
- disk->d_kd.offset = 0;
- disk->d_kd.length = OFF_MAX;
- len = sizeof(disk->d_kd);
- error = g_io_getattr("GEOM::kerneldump", rcp, &len, &disk->d_kd);
- if (disk->d_kd.di.dumper == NULL)
- G_RAID_DEBUG1(2, sc, "Dumping not supported by %s: %d.",
- rcp->provider->name, error);
+ g_raid_get_disk_info(disk);
g_raid_md_nvidia_new_disk(disk);
@@ -1117,15 +1110,7 @@ g_raid_md_ctl_nvidia(struct g_raid_md_ob
cp->private = disk;
g_topology_unlock();
- /* Read kernel dumping information. */
- disk->d_kd.offset = 0;
- disk->d_kd.length = OFF_MAX;
- len = sizeof(disk->d_kd);
- g_io_getattr("GEOM::kerneldump", cp, &len, &disk->d_kd);
- if (disk->d_kd.di.dumper == NULL)
- G_RAID_DEBUG1(2, sc,
- "Dumping not supported by %s.",
- cp->provider->name);
+ g_raid_get_disk_info(disk);
pd->pd_disk_size = pp->mediasize;
if (size > pp->mediasize)
@@ -1377,15 +1362,7 @@ g_raid_md_ctl_nvidia(struct g_raid_md_ob
cp->private = disk;
g_topology_unlock();
- /* Read kernel dumping information. */
- disk->d_kd.offset = 0;
- disk->d_kd.length = OFF_MAX;
- len = sizeof(disk->d_kd);
- g_io_getattr("GEOM::kerneldump", cp, &len, &disk->d_kd);
- if (disk->d_kd.di.dumper == NULL)
- G_RAID_DEBUG1(2, sc,
- "Dumping not supported by %s.",
- cp->provider->name);
+ g_raid_get_disk_info(disk);
/* Welcome the "new" disk. */
update += g_raid_md_nvidia_start_disk(disk);
Modified: head/sys/geom/raid/md_promise.c
==============================================================================
--- head/sys/geom/raid/md_promise.c Mon Oct 29 17:52:43 2012
(r242322)
+++ head/sys/geom/raid/md_promise.c Mon Oct 29 18:04:38 2012
(r242323)
@@ -1046,7 +1046,7 @@ g_raid_md_taste_promise(struct g_raid_md
struct promise_raid_conf *meta, *metaarr[4];
struct g_raid_md_promise_perdisk *pd;
struct g_geom *geom;
- int error, i, j, result, len, subdisks;
+ int i, j, result, len, subdisks;
char name[16];
uint16_t vendor;
@@ -1142,14 +1142,7 @@ search:
disk->d_consumer = rcp;
rcp->private = disk;
- /* Read kernel dumping information. */
- disk->d_kd.offset = 0;
- disk->d_kd.length = OFF_MAX;
- len = sizeof(disk->d_kd);
- error = g_io_getattr("GEOM::kerneldump", rcp, &len, &disk->d_kd);
- if (disk->d_kd.di.dumper == NULL)
- G_RAID_DEBUG1(2, sc, "Dumping not supported by %s: %d.",
- rcp->provider->name, error);
+ g_raid_get_disk_info(disk);
g_raid_md_promise_new_disk(disk);
@@ -1337,15 +1330,7 @@ g_raid_md_ctl_promise(struct g_raid_md_o
break;
}
- /* Read kernel dumping information. */
- disk->d_kd.offset = 0;
- disk->d_kd.length = OFF_MAX;
- len = sizeof(disk->d_kd);
- g_io_getattr("GEOM::kerneldump", cp, &len, &disk->d_kd);
- if (disk->d_kd.di.dumper == NULL)
- G_RAID_DEBUG1(2, sc,
- "Dumping not supported by %s.",
- cp->provider->name);
+ g_raid_get_disk_info(disk);
/* Reserve some space for metadata. */
size = MIN(size, pp->mediasize - 131072llu *
pp->sectorsize);
@@ -1659,15 +1644,7 @@ g_raid_md_ctl_promise(struct g_raid_md_o
disk->d_md_data = (void *)pd;
cp->private = disk;
- /* Read kernel dumping information. */
- disk->d_kd.offset = 0;
- disk->d_kd.length = OFF_MAX;
- len = sizeof(disk->d_kd);
- g_io_getattr("GEOM::kerneldump", cp, &len, &disk->d_kd);
- if (disk->d_kd.di.dumper == NULL)
- G_RAID_DEBUG1(2, sc,
- "Dumping not supported by %s.",
- cp->provider->name);
+ g_raid_get_disk_info(disk);
/* Welcome the "new" disk. */
g_raid_change_disk_state(disk, G_RAID_DISK_S_SPARE);
Modified: head/sys/geom/raid/md_sii.c
==============================================================================
--- head/sys/geom/raid/md_sii.c Mon Oct 29 17:52:43 2012 (r242322)
+++ head/sys/geom/raid/md_sii.c Mon Oct 29 18:04:38 2012 (r242323)
@@ -912,7 +912,7 @@ g_raid_md_taste_sii(struct g_raid_md_obj
struct sii_raid_conf *meta;
struct g_raid_md_sii_perdisk *pd;
struct g_geom *geom;
- int error, disk_pos, result, spare, len;
+ int disk_pos, result, spare, len;
char name[32];
uint16_t vendor;
@@ -1032,14 +1032,7 @@ search:
disk->d_consumer = rcp;
rcp->private = disk;
- /* Read kernel dumping information. */
- disk->d_kd.offset = 0;
- disk->d_kd.length = OFF_MAX;
- len = sizeof(disk->d_kd);
- error = g_io_getattr("GEOM::kerneldump", rcp, &len, &disk->d_kd);
- if (disk->d_kd.di.dumper == NULL)
- G_RAID_DEBUG1(2, sc, "Dumping not supported by %s: %d.",
- rcp->provider->name, error);
+ g_raid_get_disk_info(disk);
g_raid_md_sii_new_disk(disk);
@@ -1201,15 +1194,7 @@ g_raid_md_ctl_sii(struct g_raid_md_objec
cp->private = disk;
g_topology_unlock();
- /* Read kernel dumping information. */
- disk->d_kd.offset = 0;
- disk->d_kd.length = OFF_MAX;
- len = sizeof(disk->d_kd);
- g_io_getattr("GEOM::kerneldump", cp, &len, &disk->d_kd);
- if (disk->d_kd.di.dumper == NULL)
- G_RAID_DEBUG1(2, sc,
- "Dumping not supported by %s.",
- cp->provider->name);
+ g_raid_get_disk_info(disk);
pd->pd_disk_size = pp->mediasize;
if (size > pp->mediasize)
@@ -1459,15 +1444,7 @@ g_raid_md_ctl_sii(struct g_raid_md_objec
cp->private = disk;
g_topology_unlock();
- /* Read kernel dumping information. */
- disk->d_kd.offset = 0;
- disk->d_kd.length = OFF_MAX;
- len = sizeof(disk->d_kd);
- g_io_getattr("GEOM::kerneldump", cp, &len, &disk->d_kd);
- if (disk->d_kd.di.dumper == NULL)
- G_RAID_DEBUG1(2, sc,
- "Dumping not supported by %s.",
- cp->provider->name);
+ g_raid_get_disk_info(disk);
/* Welcome the "new" disk. */
update += g_raid_md_sii_start_disk(disk);
Modified: head/sys/geom/raid/tr_concat.c
==============================================================================
--- head/sys/geom/raid/tr_concat.c Mon Oct 29 17:52:43 2012
(r242322)
+++ head/sys/geom/raid/tr_concat.c Mon Oct 29 18:04:38 2012
(r242323)
@@ -248,7 +248,8 @@ g_raid_tr_iostart_concat(struct g_raid_t
cbp->bio_caller1 = sd;
bioq_insert_tail(&queue, cbp);
remain -= length;
- addr += length;
+ if (bp->bio_cmd != BIO_DELETE)
+ addr += length;
offset = 0;
no++;
KASSERT(no < vol->v_disks_count || remain == 0,
Modified: head/sys/geom/raid/tr_raid0.c
==============================================================================
--- head/sys/geom/raid/tr_raid0.c Mon Oct 29 17:52:43 2012
(r242322)
+++ head/sys/geom/raid/tr_raid0.c Mon Oct 29 18:04:38 2012
(r242323)
@@ -234,7 +234,8 @@ g_raid_tr_iostart_raid0(struct g_raid_tr
offset += strip_size;
}
remain -= length;
- addr += length;
+ if (bp->bio_cmd != BIO_DELETE)
+ addr += length;
start = 0;
} while (remain > 0);
for (cbp = bioq_first(&queue); cbp != NULL;
Modified: head/sys/geom/raid/tr_raid1.c
==============================================================================
--- head/sys/geom/raid/tr_raid1.c Mon Oct 29 17:52:43 2012
(r242322)
+++ head/sys/geom/raid/tr_raid1.c Mon Oct 29 18:04:38 2012
(r242323)
@@ -647,10 +647,8 @@ g_raid_tr_iostart_raid1(struct g_raid_tr
g_raid_tr_iostart_raid1_read(tr, bp);
break;
case BIO_WRITE:
- g_raid_tr_iostart_raid1_write(tr, bp);
- break;
case BIO_DELETE:
- g_raid_iodone(bp, EIO);
+ g_raid_tr_iostart_raid1_write(tr, bp);
break;
case BIO_FLUSH:
g_raid_tr_flush_common(tr, bp);
@@ -893,7 +891,7 @@ rebuild_round_done:
g_raid_unlock_range(sd->sd_volume, bp->bio_offset,
bp->bio_length);
}
- if (pbp->bio_cmd != BIO_READ) {
+ if (pbp->bio_cmd == BIO_WRITE) {
if (pbp->bio_inbed == 1 || pbp->bio_error != 0)
pbp->bio_error = bp->bio_error;
if (bp->bio_error != 0) {
Modified: head/sys/geom/raid/tr_raid1e.c
==============================================================================
--- head/sys/geom/raid/tr_raid1e.c Mon Oct 29 17:52:43 2012
(r242322)
+++ head/sys/geom/raid/tr_raid1e.c Mon Oct 29 18:04:38 2012
(r242323)
@@ -802,7 +802,8 @@ nextdisk:
}
}
remain -= length;
- addr += length;
+ if (bp->bio_cmd != BIO_DELETE)
+ addr += length;
start = 0;
}
for (cbp = bioq_first(&queue); cbp != NULL;
@@ -858,10 +859,8 @@ g_raid_tr_iostart_raid1e(struct g_raid_t
g_raid_tr_iostart_raid1e_read(tr, bp);
break;
case BIO_WRITE:
- g_raid_tr_iostart_raid1e_write(tr, bp);
- break;
case BIO_DELETE:
- g_raid_iodone(bp, EIO);
+ g_raid_tr_iostart_raid1e_write(tr, bp);
break;
case BIO_FLUSH:
g_raid_tr_flush_common(tr, bp);
@@ -1119,7 +1118,7 @@ rebuild_round_done:
G_RAID_LOGREQ(2, bp, "REMAP done %d.", bp->bio_error);
g_raid_unlock_range(sd->sd_volume, virtual, bp->bio_length);
}
- if (pbp->bio_cmd != BIO_READ) {
+ if (pbp->bio_cmd == BIO_WRITE) {
if (pbp->bio_inbed == 1 || pbp->bio_error != 0)
pbp->bio_error = bp->bio_error;
if (bp->bio_error != 0) {
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