Hi, I have already reported this on kernel.org: https://bugzilla.kernel.org/show_bug.cgi?id=219486
BTW, if I use the O_DIRECT flag, dd returns I/O error. For example: root@ubutest:~# pvs;lvs PV VG Fmt Attr PSize PFree /dev/sda3 ubuntu-vg lvm2 a-- <17.32g 4.00m /dev/sdb1 vgtest lvm2 a-- <2.00g 0 LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert ubuntu-lv ubuntu-vg -wi-ao---- 17.31g lvtest vgtest -wi-a----- <2.00g root@ubutest:~# echo offline > /sys/block/sdb/device/state root@ubutest:~# root@ubutest:~# dd if=f.tar of=/dev/mapper/vgtest-lvtest bs=10M count=204 oflag=direct ## oflag= dd: error writing '/dev/mapper/vgtest-lvtest': Input/output error 1+0 records in 0+0 records out 0 bytes copied, 0.00977631 s, 0.0 kB/s root@ubutest:~# -- Regards, Mirek ** Bug watch added: Linux Kernel Bug Tracker #219486 https://bugzilla.kernel.org/show_bug.cgi?id=219486 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/2084979 Title: Device Mapper accepts writes even when the underlying devices are dead (offline or transport-offline) Status in linux package in Ubuntu: New Bug description: ********** #### Steps to reproduce ********** root@ubusrv:~# lsblk /dev/sda NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS sda 8:0 0 2G 0 disk └─sda1 8:1 0 2G 0 part root@ubusrv:~# root@ubusrv:~# pvcreate /dev/sda1 Physical volume "/dev/sda1" successfully created. root@ubusrv:~# vgcreate vgtmp /dev/sda1 Volume group "vgtmp" successfully created root@ubusrv:~# lvcreate -n lvtmp -l 100%free vgtmp Logical volume "lvtmp" created. root@ubusrv:~# lvs LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert ubuntu-lv ubuntu-vg -wi-ao---- 18.22g lvtmp vgtmp -wi-a----- <2.00g root@ubusrv:~# root@ubusrv:~# cat /sys/block/sda/device/state running root@ubusrv:~# echo offline > /sys/block/sda/device/state root@ubusrv:~# cat /sys/block/sda/device/state offline root@ubusrv:~# root@ubusrv:~# l file.tar -rw-r--r-- 1 root root 2.4G Oct 19 14:12 file.tar root@ubusrv:~# ---------------------- 1. Reading from faulty DM device: OK - expected behavior root@ubusrv:~# dd if=/dev/mapper/vgtmp-lvtmp dd: error reading '/dev/mapper/vgtmp-lvtmp': Input/output error 0+0 records in 0+0 records out 0 bytes copied, 0.00298229 s, 0.0 kB/s root@ubusrv:~# 2. Reading from faulty/offline underlying sda: OK - expected behavior root@ubusrv:~# dd if=/dev/sda1 dd: failed to open '/dev/sda1': No such device or address root@ubusrv:~# 3. Writing to faulty/offline underlying sda: OK - expected behavior root@ubusrv:~# dd of=/dev/sda1 dd: failed to open '/dev/sda1': No such device or address root@ubusrv:~# 4. And writing to faulty DM device: not OK - UNEXPECTED behavior root@ubusrv:~# dd if=file.tar of=/dev/mapper/vgtmp-lvtmp bs=10M count=204 204+0 records in 204+0 records out 2139095040 bytes (2.1 GB, 2.0 GiB) copied, 4.57038 s, 468 MB/s <<<<<<<< root@ubusrv:~# ---------------------- ******** Where this data has been stored? Not in memory - not enough space: root@ubusrv:~# free total used free shared buff/cache available Mem: 961Mi 361Mi 200Mi 1.3Mi 556Mi 599Mi <<<< Swap: 2.0Gi 0B 2.0Gi root@ubusrv:~# And the same applies to iSCSI+MPIO. ---------------------- root@ubusrv:~# multipath -ll mpatha (3600140582d6e7c50c0347908f0d094c2) dm-2 LIO-ORG,ubusrv-wrbk size=4.4G features='1 queue_if_no_path' hwhandler='1 alua' wp=rw `-+- policy='service-time 0' prio=50 status=active |- 8:0:0:135 sdc 8:32 active ready running `- 7:0:0:135 sdb 8:16 active ready running mpathb (3600140512e2d3ad7ae048aba1ee0a33a) dm-3 LIO-ORG,ubusrv-wrth size=3.9G features='1 queue_if_no_path' hwhandler='1 alua' wp=rw `-+- policy='service-time 0' prio=50 status=active |- 8:0:0:235 sdd 8:48 active ready running `- 7:0:0:235 sde 8:64 active ready running root@ubusrv:~# #### poweroff iSCSI target/server root@ubusrv:~# egrep 'mpath[ab]' /var/log/syslog | tail 2024-10-19T15:07:01.810687+02:00 ubusrv multipathd[382]: checker failed path 8:64 in map mpathb 2024-10-19T15:07:01.811658+02:00 ubusrv multipathd[382]: mpathb: remaining active paths: 1 2024-10-19T15:07:02.810464+02:00 ubusrv multipathd[382]: checker failed path 8:16 in map mpatha 2024-10-19T15:07:02.813151+02:00 ubusrv multipathd[382]: mpatha: Entering recovery mode: max_retries=12 2024-10-19T15:07:02.813182+02:00 ubusrv multipathd[382]: mpatha: remaining active paths: 0 2024-10-19T15:07:04.811717+02:00 ubusrv multipathd[382]: checker failed path 8:48 in map mpathb 2024-10-19T15:07:04.813169+02:00 ubusrv multipathd[382]: mpathb: Entering recovery mode: max_retries=12 2024-10-19T15:07:04.813206+02:00 ubusrv multipathd[382]: mpathb: remaining active paths: 0 2024-10-19T15:08:02.844668+02:00 ubusrv multipathd[382]: mpatha: Disable queueing 2024-10-19T15:08:04.845680+02:00 ubusrv multipathd[382]: mpathb: Disable queueing root@ubusrv:~# root@ubusrv:~# iscsiadm -m session -P 3 | grep Att Attached SCSI devices: Attached scsi disk sdb State: transport-offline Attached scsi disk sde State: transport-offline Attached SCSI devices: Attached scsi disk sdc State: transport-offline Attached scsi disk sdd State: transport-offline root@ubusrv:~# root@ubusrv:~# multipath -ll mpatha (3600140582d6e7c50c0347908f0d094c2) dm-2 LIO-ORG,ubusrv-wrbk size=4.4G features='0' hwhandler='1 alua' wp=rw `-+- policy='service-time 0' prio=0 status=active |- 8:0:0:135 sdc 8:32 failed faulty running `- 7:0:0:135 sdb 8:16 failed faulty running mpathb (3600140512e2d3ad7ae048aba1ee0a33a) dm-3 LIO-ORG,ubusrv-wrth size=3.9G features='0' hwhandler='1 alua' wp=rw `-+- policy='service-time 0' prio=0 status=active |- 8:0:0:235 sdd 8:48 failed faulty running `- 7:0:0:235 sde 8:64 failed faulty running root@ubusrv:~# root@ubusrv:~# cat /sys/block/sd[b-e]/device/state transport-offline transport-offline transport-offline transport-offline root@ubusrv:~# root@ubusrv:~# l /dev/mapper/mpath* lrwxrwxrwx 1 root root 7 Oct 19 13:35 /dev/mapper/mpatha -> ../dm-2 lrwxrwxrwx 1 root root 7 Oct 19 13:35 /dev/mapper/mpatha-part1 -> ../dm-4 lrwxrwxrwx 1 root root 7 Oct 19 13:35 /dev/mapper/mpathb -> ../dm-3 lrwxrwxrwx 1 root root 7 Oct 19 13:35 /dev/mapper/mpathb-part1 -> ../dm-5 root@ubusrv:~# ******** root@ubusrv:~# dd if=file.tar of=/dev/mapper/mpatha-part1 bs=10M 240+1 records in 240+1 records out 2526904320 bytes (2.5 GB, 2.4 GiB) copied, 5.65064 s, 447 MB/s <<<<<<<< root@ubusrv:~# ******** ---------------------- Is it a Device Mapper feature? -- Regards, Mirek ProblemType: Bug DistroRelease: Ubuntu 24.04 Package: linux-image-6.8.0-47-generic 6.8.0-47.47 ProcVersionSignature: Ubuntu 6.8.0-47.47-generic 6.8.12 Uname: Linux 6.8.0-47-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version k6.8.0-47-generic. AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.28.1-0ubuntu3.1 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/timer', '/dev/snd/seq', '/dev/snd/pcmC0D0p', '/dev/snd/pcmC0D0c', '/dev/snd/hwC0D0', '/dev/snd/controlC0', '/dev/snd/by-path'] failed with exit code 1: CRDA: N/A Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer' Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer' CasperMD5CheckResult: pass Date: Sat Oct 19 15:39:00 2024 InstallationDate: Installed on 2024-09-03 (46 days ago) InstallationMedia: Ubuntu-Server 24.04 LTS "Noble Numbat" - Release amd64 (20240423) IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' Lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 002: ID 0627:0001 Adomax Technology Co., Ltd QEMU Tablet Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Lsusb-t: /: Bus 001.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/15p, 480M |__ Port 001: Dev 002, If 0, Class=Human Interface Device, Driver=usbhid, 480M /: Bus 002.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/15p, 5000M MachineType: QEMU Standard PC (Q35 + ICH9, 2009) ProcEnviron: LANG=en_US.UTF-8 PATH=(custom, no user) SHELL=/bin/bash TERM=xterm-256color ProcFB: 0 qxldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.8.0-47-generic root=/dev/mapper/ubuntu--vg-ubuntu--lv ro RelatedPackageVersions: linux-restricted-modules-6.8.0-47-generic N/A linux-backports-modules-6.8.0-47-generic N/A linux-firmware 20240318.git3b128b60-0ubuntu2.4 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/01/2014 dmi.bios.release: 0.0 dmi.bios.vendor: SeaBIOS dmi.bios.version: 1.16.3-debian-1.16.3-2 dmi.chassis.type: 1 dmi.chassis.vendor: QEMU dmi.chassis.version: pc-q35-8.2 dmi.modalias: dmi:bvnSeaBIOS:bvr1.16.3-debian-1.16.3-2:bd04/01/2014:br0.0:svnQEMU:pnStandardPC(Q35+ICH9,2009):pvrpc-q35-8.2:cvnQEMU:ct1:cvrpc-q35-8.2:sku: dmi.product.name: Standard PC (Q35 + ICH9, 2009) dmi.product.version: pc-q35-8.2 dmi.sys.vendor: QEMU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2084979/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
