iSCSI target

[BERTRAND Joël <joel.bertrand%systella.fr@localhost>]

	Hello,

	I'm trying to configure a iSCSI target on a NetBSD 9.0. I have added a
new disk in my NIS/NFS server that appears as /dev/rwd0.

legendre# fdisk /dev/wd0
Disk: /dev/wd0d
NetBSD disklabel disk geometry:
cylinders: 310101, heads: 16, sectors/track: 63 (1008 sectors/cylinder)
total sectors: 312581808, bytes/sector: 512

BIOS disk geometry:
cylinders: 1024, heads: 255, sectors/track: 63 (16065 sectors/cylinder)
total sectors: 312581808

Partitions aligned to 16065 sector boundaries, offset 63

Partition table:
0: NetBSD (sysid 169)
    start 63, size 312581745 (152628 MB, Cyls 0-19457/80/63)
        PBR is not bootable: All bytes are identical (0x00)
1: <UNUSED>
2: <UNUSED>
3: <UNUSED>
No active partition.
Drive serial number: 1696063557 (0x6517e045)
legendre# disklabel /dev/rwd0
# /dev/rwd0d:
type: ESDI
disk: wd0
label: fictitious
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 16
sectors/cylinder: 1008
cylinders: 310101
total sectors: 312581808
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0           # microseconds
track-to-track seek: 0  # microseconds
drivedata: 0

5 partitions:
#        size    offset     fstype [fsize bsize cpg/sgs]
 c: 312581745        63     unused      0     0        # (Cyl.      0*-
310100)
 d: 312581808         0     unused      0     0        # (Cyl.      0 -
310100)
 e:  65536000        63       swap                     # (Cyl.      0*-
65015*)
legendre#

	I want to only export /dev/wd0e. Thus, I have written in
/etc/iscsi/targets :
# extent        file or device          start           length
extent0         /dev/rwd0e                      0
32000MB
# target        flags   storage         netmask
target0         rw              extent0         192.168.10.103/32

and restarted iscsid :
Starting iscsi_target.
Reading configuration from `/etc/iscsi/targets'
target0:rw:192.168.10.103/32
        extent0:/dev/rwd0e:0:33554432000
DISK: 1 logical unit (65536000 blocks, 512 bytes/block), type iscsi fs
DISK: LUN 0: 32000 MB disk storage for "target0"
TARGET: iSCSI Qualified Name (IQN) is iqn.1994-04.org.netbsd.iscsi-target

	On client side (Linux debian) :
iscsiadm --mode node --targetname
iqn.1994-04.org.netbsd.iscsi-target:target0 --portal 192.168.10.128 --login

and I obtain in dmesg :
[11435.508280] scsi host6: iSCSI Initiator over TCP/IP
[11435.517173] scsi 6:0:0:0: Direct-Access     NetBSD   NetBSD iSCSI
0    PQ: 0 ANSI: 3
[11435.517315] sd 6:0:0:0: Attached scsi generic sg1 type 0
[11435.517709] sd 6:0:0:0: [sdb] 65536000 512-byte logical blocks: (33.6
GB/31.3 GiB)
[11435.517825] sd 6:0:0:0: [sdb] Write Protect is off
[11435.517828] sd 6:0:0:0: [sdb] Mode Sense: 0e 00 00 08
[11435.518042] sd 6:0:0:0: [sdb] Incomplete mode parameter data
[11435.518046] sd 6:0:0:0: [sdb] Assuming drive cache: write through
[11435.722414] sd 6:0:0:0: [sdb] Attached SCSI disk

But mkswap does't run as expected :
root@hilbert:/etc/iscsi/nodes# mkswap /dev/sdb
mkswap: /dev/sdb: warning: wiping old ext2 signature.
Setting up swapspace version 1, size = 31,3 GiB (33554427904 bytes)
no label, UUID=1573d8e2-4479-47fa-a1a2-b2398c8390c1
mkswap: write failed: Erreur d'entrée/sortie

and fdisk returns :
root@hilbert:/etc/iscsi/nodes# fdisk /dev/sdb

Welcome to fdisk (util-linux 2.34).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.


Command (m for help): p
Disk /dev/sdb: 31,26 GiB, 33554432000 bytes, 65536000 sectors
Disk model: NetBSD iSCSI
Geometry: 16 heads, 63 sectors/track, 310101 cylinders
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: bsd

Slice Start       End   Sectors   Size Type     Fsize Bsize Cpg
c        63 312581807 312581745 149,1G unused       0     0   0
d         0 312581807 312581808 149,1G unused       0     0   0
e        63  65536062  65536000  31,3G swap         0     0   0

Partition table entries are not in disk order.

Command (m for help):


	I don't understand why whole disk seems to be accessible and why
/var/log/syslog contains :

[11732.405047]  connection4:0: Got CHECK_CONDITION but invalid data
buffer size of 0
[11732.405060] sd 6:0:0:0: [sdb] tag#28 FAILED Result:
hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
[11732.405066] sd 6:0:0:0: [sdb] tag#28 CDB: Write(10) 2a 00 00 00 00 00
00 00 08 00
[11732.405069] print_req_error: I/O error, dev sdb, sector 0
[11732.405072] Buffer I/O error on dev sdb, logical block 0, lost async
page write
[11732.439371]  connection4:0: Got CHECK_CONDITION but invalid data
buffer size of 0
[11732.439382] sd 6:0:0:0: [sdb] tag#57 FAILED Result:
hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
[11732.439387] sd 6:0:0:0: [sdb] tag#57 CDB: Write(10) 2a 00 00 00 00 00
00 00 08 00
[11732.439390] print_req_error: I/O error, dev sdb, sector 0
[11732.439393] Buffer I/O error on dev sdb, logical block 0, lost async
page write

	Any idea ?

	Best regards,

	JKB