Public bug reported:
Test failed with mount operation:
mount: /tmp/mnt-5fbc7c59fd22c5a6531b40b0759624b680a95e52: wrong fs type,
bad option, bad superblock on /dev/loop0, missing codepage or helper program,
or other error.
This patch could be found in Bionic tree:
https://kernel.ubuntu.com/git/ubuntu/ubuntu-bionic.git/commit/?id=5fbc7c59fd22c5a6531b40b0759624b680a95e52
Invoking test 5fbc7c59fd22c5a6531b40b0759624b680a95e52
fix 5fbc7c59fd22c5a6531b40b0759624b680a95e52
Btrfs: fix unfinished readahead thread for raid5/6 degraded mounting
Steps to reproduce:
# mkfs.btrfs -f /dev/sd[b-f] -m raid5 -d raid5
# mkfs.ext4 /dev/sdc --->corrupt one of btrfs device
# mount /dev/sdb /mnt -o degraded
# btrfs scrub start -BRd /mnt
This is because readahead would skip missing device, this is not true
for RAID5/6, because REQ_GET_READ_MIRRORS return 1 for RAID5/6 block
mapping. If expected data locates in missing device, readahead thread
would not call __readahead_hook() which makes event @rc->elems=0
wait forever.
Fix this problem by checking return value of btrfs_map_block(),we
can only skip missing device safely if there are several mirrors.
mke2fs 1.44.1 (24-Mar-2018)
Discarding device blocks: 4096/524288*************
*************done
Creating filesystem with 524288 4k blocks and 131072 inodes
Filesystem UUID: c4b9a22f-cacb-44d6-80b9-cca217a61f5b
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912
Allocating group tables: 0/16***** *****done
Writing inode tables: 0/16***** *****done
Creating journal (16384 blocks): done
Writing superblocks and filesystem accounting information: 0/16*****
*****done
mount: /tmp/mnt-5fbc7c59fd22c5a6531b40b0759624b680a95e52: wrong fs type, bad
option, bad superblock on /dev/loop0, missing codepage or helper program, or
other error.
ERROR: not a btrfs filesystem: /tmp/mnt-5fbc7c59fd22c5a6531b40b0759624b680a95e52
btrfs scrub start on /tmp/mnt-5fbc7c59fd22c5a6531b40b0759624b680a95e52 failed
umount: /tmp/mnt-5fbc7c59fd22c5a6531b40b0759624b680a95e52: not mounted.
FAIL: 5fbc7c59fd22c5a6531b40b0759624b680a95e52 (ret=1)
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-43-generic 4.15.0-43.46
ProcVersionSignature: User Name 4.15.0-43.46-generic 4.15.18
Uname: Linux 4.15.0-43-generic x86_64
AlsaDevices:
total 0
crw-rw---- 1 root audio 116, 1 Dec 31 02:11 seq
crw-rw---- 1 root audio 116, 33 Dec 31 02:11 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay'
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
Date: Thu Jan 3 07:37:01 2019
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig'
Lsusb: Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: QEMU Standard PC (i440FX + PIIX, 1996)
PciMultimedia:
ProcFB: 0 cirrusdrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-43-generic
root=UUID=2f68c627-8ab4-40d5-8c06-6563436d0f96 ro console=ttyS0,115200n8
RelatedPackageVersions:
linux-restricted-modules-4.15.0-43-generic N/A
linux-backports-modules-4.15.0-43-generic N/A
linux-firmware 1.173.2
RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/01/2014
dmi.bios.vendor: SeaBIOS
dmi.bios.version: Ubuntu-1.8.2-1ubuntu1
dmi.chassis.type: 1
dmi.chassis.vendor: QEMU
dmi.chassis.version: pc-i440fx-xenial
dmi.modalias:
dmi:bvnSeaBIOS:bvrUbuntu-1.8.2-1ubuntu1:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-xenial:cvnQEMU:ct1:cvrpc-i440fx-xenial:
dmi.product.name: Standard PC (i440FX + PIIX, 1996)
dmi.product.version: pc-i440fx-xenial
dmi.sys.vendor: QEMU
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Confirmed
** Tags: amd64 apport-bug bionic uec-images
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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/1810376
Title:
5fbc7c59fd22c5a6531b40b0759624b680a95e52 in btrfs_kernel_fixes failed
on B
Status in linux package in Ubuntu:
Confirmed
Bug description:
Test failed with mount operation:
mount: /tmp/mnt-5fbc7c59fd22c5a6531b40b0759624b680a95e52: wrong fs type,
bad option, bad superblock on /dev/loop0, missing codepage or helper program,
or other error.
This patch could be found in Bionic tree:
https://kernel.ubuntu.com/git/ubuntu/ubuntu-bionic.git/commit/?id=5fbc7c59fd22c5a6531b40b0759624b680a95e52
Invoking test 5fbc7c59fd22c5a6531b40b0759624b680a95e52
fix 5fbc7c59fd22c5a6531b40b0759624b680a95e52
Btrfs: fix unfinished readahead thread for raid5/6 degraded
mounting
Steps to reproduce:
# mkfs.btrfs -f /dev/sd[b-f] -m raid5 -d raid5
# mkfs.ext4 /dev/sdc --->corrupt one of btrfs device
# mount /dev/sdb /mnt -o degraded
# btrfs scrub start -BRd /mnt
This is because readahead would skip missing device, this is not true
for RAID5/6, because REQ_GET_READ_MIRRORS return 1 for RAID5/6 block
mapping. If expected data locates in missing device, readahead thread
would not call __readahead_hook() which makes event @rc->elems=0
wait forever.
Fix this problem by checking return value of btrfs_map_block(),we
can only skip missing device safely if there are several mirrors.
mke2fs 1.44.1 (24-Mar-2018)
Discarding device blocks: 4096/524288*************
*************done
Creating filesystem with 524288 4k blocks and 131072 inodes
Filesystem UUID: c4b9a22f-cacb-44d6-80b9-cca217a61f5b
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912
Allocating group tables: 0/16***** *****done
Writing inode tables: 0/16***** *****done
Creating journal (16384 blocks): done
Writing superblocks and filesystem accounting information: 0/16*****
*****done
mount: /tmp/mnt-5fbc7c59fd22c5a6531b40b0759624b680a95e52: wrong fs type, bad
option, bad superblock on /dev/loop0, missing codepage or helper program, or
other error.
ERROR: not a btrfs filesystem:
/tmp/mnt-5fbc7c59fd22c5a6531b40b0759624b680a95e52
btrfs scrub start on /tmp/mnt-5fbc7c59fd22c5a6531b40b0759624b680a95e52 failed
umount: /tmp/mnt-5fbc7c59fd22c5a6531b40b0759624b680a95e52: not mounted.
FAIL: 5fbc7c59fd22c5a6531b40b0759624b680a95e52 (ret=1)
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-43-generic 4.15.0-43.46
ProcVersionSignature: User Name 4.15.0-43.46-generic 4.15.18
Uname: Linux 4.15.0-43-generic x86_64
AlsaDevices:
total 0
crw-rw---- 1 root audio 116, 1 Dec 31 02:11 seq
crw-rw---- 1 root audio 116, 33 Dec 31 02:11 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay'
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord':
'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
Date: Thu Jan 3 07:37:01 2019
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig'
Lsusb: Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: QEMU Standard PC (i440FX + PIIX, 1996)
PciMultimedia:
ProcFB: 0 cirrusdrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-43-generic
root=UUID=2f68c627-8ab4-40d5-8c06-6563436d0f96 ro console=ttyS0,115200n8
RelatedPackageVersions:
linux-restricted-modules-4.15.0-43-generic N/A
linux-backports-modules-4.15.0-43-generic N/A
linux-firmware 1.173.2
RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/01/2014
dmi.bios.vendor: SeaBIOS
dmi.bios.version: Ubuntu-1.8.2-1ubuntu1
dmi.chassis.type: 1
dmi.chassis.vendor: QEMU
dmi.chassis.version: pc-i440fx-xenial
dmi.modalias:
dmi:bvnSeaBIOS:bvrUbuntu-1.8.2-1ubuntu1:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-xenial:cvnQEMU:ct1:cvrpc-i440fx-xenial:
dmi.product.name: Standard PC (i440FX + PIIX, 1996)
dmi.product.version: pc-i440fx-xenial
dmi.sys.vendor: QEMU
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