On Tue, 2012-09-04 at 21:44 +0200, Paolo Bonzini wrote: > So far I reproduced this with 3.4.0. I'll try a more recent kernel tomorrow. > > It reproduces with both loopback and iSCSI backends. Here is it with loopback. > > The configuration is: > > cd /sys/kernel/config/target > mkdir -p core/pscsi_0/sda > echo scsi_host_id=0,scsi_channel_id=0,scsi_target_id=0,scsi_lun_id=0 > core/pscsi_0/sda/control > echo /dev/sda > core/pscsi_0/sda/udev_path > echo 1 > core/pscsi_0/sda/enable > > mkdir -p loopback/naa.600140554cf3a18e/tpgt_1 > mkdir -p loopback/naa.600140554cf3a18e/tpgt_1/lun/lun_1 > cd loopback/naa.600140554cf3a18e/tpgt_1 > echo naa.60014053226f0388 > nexus > ln -sf ../../../core/pscsi_0/sda lun/lun_1/virtual_scsi_port > echo '- - -' > `echo /sys/bus/tcm_loop_bus/drivers/tcm_loop/tcm_loop_adapter_0/host*/scsi_host/host*/scan` > > This works: > > # sg_read blk_sgio=1 if=/dev/sdb skip=20807 count=2 cdbsz=10 > /dev/null > Assume default 'bs' (block size) of 512 bytes > reading: SCSI status: Check Condition > Fixed format, current; Sense key: Illegal Request > Additional sense: Logical block address out of range > sg_read: SCSI READ failed > Some error occurred, remaining block count=2 > 0+0 records in > # sg_read blk_sgio=1 if=/dev/sda skip=20807 count=2 cdbsz=10 > /dev/null > Assume default 'bs' (block size) of 512 bytes > reading: SCSI status: Check Condition > Fixed format, current; Sense key: Illegal Request > Additional sense: Logical block address out of range > sg_read: SCSI READ failed > Some error occurred, remaining block count=2 > 0+0 records in > > This doesn't: > > # sg_read blk_sgio=1 if=/dev/sda skip=0x80000000 count=2 cdbsz=10 > /dev/null > Assume default 'bs' (block size) of 512 bytes > reading: SCSI status: Check Condition > Fixed format, current; Sense key: Illegal Request > Additional sense: Logical block address out of range > sg_read: SCSI READ failed > Some error occurred, remaining block count=2 > 0+0 records in > # sg_read blk_sgio=1 if=/dev/sdb skip=0x80000000 count=2 cdbsz=10 > /dev/null > Assume default 'bs' (block size) of 512 bytes > reading: SCSI status: Check Condition > Fixed format, current; Sense key: Illegal Request > vendor specific ASC=80, ASCQ= 0 Mmmm.. > sg_read: SCSI READ failed > Some error occurred, remaining block count=2 > 0+0 records in > > and leaves this in dmesg: > [ 196.672498] LBA: 2147483648 Sectors: 2 exceeds transport_dev_end_lba(): 20809 > Looks like we are overflowing somewhere during the end of lba check for this case. Btw, this code is generic to all backends for data I/O, so I'm thinking it's likely a bug that is independent of pSCSI. Thanks for reporting! -- To unsubscribe from this list: send the line "unsubscribe target-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
