** Also affects: ubuntu-z-systems
Importance: Undecided
Status: New
** Changed in: ubuntu-z-systems
Status: New => Confirmed
** Changed in: ubuntu-z-systems
Importance: Undecided => Critical
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https://bugs.launchpad.net/bugs/1845323
Title:
Trying to online dasd drive results in invalid input/output from the
kernel on z/VM
Status in Ubuntu on IBM z Systems:
Confirmed
Status in linux package in Ubuntu:
Confirmed
Bug description:
SRU Justification:
==================
[Impact]
* Trying to online dasd drive results in invalid input/output from the
kernel on z/VM
[Fix]
* ? TODO - hopefully patch attached ?
[Test Case]
* Ubuntu on z/VM guest installation and selecting at least one DASD
device (that's not defined as dedicated).
* Alternatively doing an Ubuntu on z/VM guest installation on
zFCP/SCSI disk and manually activating a DASD device post-install with
'chzdev -e <device-number>'.
[Regression Potential]
* The kernel (aka DASD module) currently just fails on activating a
(non dedicated) DASD.
* But regressions might be introduced in the DASD stack so that is
fails later on LPAR installation, too - but this can easily be tested
(and will be).
* The chance that zFCP/SCSI disks are harmed by accident is quite low,
since this is a very different stack.
[Other Info]
* This is a regression that was introduced with the thin dasd provisioning
feature that landed upstream with kernel 5.2/5.3, so affects Eoan only.
__________
Sep 25 12:06:39 s390-dasd[4637]: ECKD DASD 0.0.0200 configure failed
Sep 25 12:06:39 s390-dasd[4637]: Error: Could not write file
/sys/bus/ccw/drivers/dasd-eckd/0.0.0200/online: Input/output error
Sep 25 12:06:39 s390-dasd[4637]: Configuring devices in the active
configuration only
Sep 25 12:06:39 main-menu[421]: WARNING **: Configuring 's390-dasd' failed
with error code 1
Sep 25 12:06:39 main-menu[421]: WARNING **: Menu item 's390-dasd' failed.
Sep 25 12:06:39 kernel: [ 137.472853] dasd-eckd.401b68: 0.0.0200: A channel
path to the device has become operational
Sep 25 12:06:39 kernel: [ 137.473914] dasd-eckd.6b7759: 0.0.0200: Reading
the volume storage information failed with rc=-5
Sep 25 12:06:39 kernel: [ 137.473917] dasd.3e7d29: 0.0.0200 Setting the DASD
online with discipline ECKD failed with rc=-5
Sep 25 12:06:39 kernel: [ 137.473918] ------------[ cut here ]------------
Sep 25 12:06:39 kernel: [ 137.473943] WARNING: CPU: 0 PID: 4638 at
kernel/module.c:1137 module_put.part.0+0xe2/0xe8
Sep 25 12:06:39 kernel: [ 137.473944] Modules linked in: lcs ctcm fsm zfcp
scsi_transport_fc dasd_fba_mod dasd_eckd_mod dasd_mod qeth_l2 pkey
crc32_vx_s390 qeth qdio zcrypt_cex4 ccwgroup zcrypt
Sep 25 12:06:39 kernel: [ 137.473953] CPU: 0 PID: 4638 Comm: chzdev Not
tainted 5.3.0-10-generic #11-Ubuntu
Sep 25 12:06:39 kernel: [ 137.473954] Hardware name: IBM 2964 N63 400 (z/VM
6.4.0)
Sep 25 12:06:39 kernel: [ 137.473955] Krnl PSW : 0704c00180000000
000000002b2c3372 (module_put.part.0+0xe2/0xe8)
Sep 25 12:06:39 kernel: [ 137.473958] R:0 T:1 IO:1 EX:1 Key:0 M:1
W:0 P:0 AS:3 CC:0 PM:0 RI:0 EA:3
Sep 25 12:06:39 kernel: [ 137.473959] Krnl GPRS: 0000000000000004
0000000000000006 0000000000000024 0000000000000007
Sep 25 12:06:39 kernel: [ 137.473960] 0000000000000007
000000007f2ce800 fffffffffffffffb 000003ff80151578
Sep 25 12:06:39 kernel: [ 137.473961] 00000000fffffffb
000003ff80074df8 000003ff80151900 0000000078105800
Sep 25 12:06:39 kernel: [ 137.473962] 000000007e17e600
0000000000000bf8 000000002b2c336e 000003e000c5fb08
Sep 25 12:06:39 kernel: [ 137.473969] Krnl Code: 000000002b2c3362:
c0200048859a larl %r2,2bbd3e96
Sep 25 12:06:39 kernel: [ 137.473969] 000000002b2c3368:
c0e5fffe16a4 brasl %r14,2b2860b0
Sep 25 12:06:39 kernel: [ 137.473969] #000000002b2c336e: a7f40001
brc 15,2b2c3370
Sep 25 12:06:39 kernel: [ 137.473969] >000000002b2c3372: a7f4ffb1
brc 15,2b2c32d4
Sep 25 12:06:39 kernel: [ 137.473969] 000000002b2c3376: 0707
bcr 0,%r7
Sep 25 12:06:39 kernel: [ 137.473969] 000000002b2c3378:
c00400000000 brcl 0,2b2c3378
Sep 25 12:06:39 kernel: [ 137.473969] 000000002b2c337e:
ec280006007c cgij %r2,0,8,2b2c338a
Sep 25 12:06:39 kernel: [ 137.473969] 000000002b2c3384:
c0f4ffffff86 brcl 15,2b2c3290
Sep 25 12:06:39 kernel: [ 137.473980] Call Trace:
Sep 25 12:06:39 kernel: [ 137.473982] ([<000000002b2c336e>]
module_put.part.0+0xde/0xe8)
Sep 25 12:06:39 kernel: [ 137.473994] [<000003ff80074df8>]
dasd_generic_free_discipline+0x68/0x80 [dasd_mod]
Sep 25 12:06:39 kernel: [ 137.473998] [<000003ff8007f5ba>]
dasd_delete_device+0x122/0x1c8 [dasd_mod]
Sep 25 12:06:39 kernel: [ 137.474001] [<000003ff8007bcfa>]
dasd_generic_set_online+0x2ea/0x310 [dasd_mod]
Sep 25 12:06:39 kernel: [ 137.474006] [<000000002b84db48>]
ccw_device_set_online+0x110/0x528
Sep 25 12:06:39 kernel: [ 137.474008] [<000000002b84dfb0>]
online_store_recog_and_online+0x50/0x130
Sep 25 12:06:39 kernel: [ 137.474009] [<000000002b84f042>]
online_store+0x1b2/0x2e0
Sep 25 12:06:39 kernel: [ 137.474013] [<000000002b50b7a0>]
kernfs_fop_write+0xd8/0x1f8
Sep 25 12:06:39 kernel: [ 137.474017] [<000000002b4585f8>]
vfs_write+0xb0/0x1b8
Sep 25 12:06:39 kernel: [ 137.474018] [<000000002b459eb8>]
ksys_write+0x68/0xf8
Sep 25 12:06:39 kernel: [ 137.474023] [<000000002ba4c4b8>]
system_call+0xdc/0x2c8
Sep 25 12:06:39 kernel: [ 137.474024] Last Breaking-Event-Address:
Sep 25 12:06:39 kernel: [ 137.474025] [<000000002b2c336e>]
module_put.part.0+0xde/0xe8
Sep 25 12:06:39 kernel: [ 137.474026] ---[ end trace 94b382399e0f8876 ]---
Cannot online a dasd drive with $ chzdev -e 0.0.0200
Possibly regression in the new kernel, due to thin provisioning
patches to dasd? just a wild guess.
$ uname -a
Linux hwe0006 5.3.0-10-generic #11-Ubuntu SMP Mon Sep 9 15:08:10 UTC 2019
s390x GNU/Linux
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