Public bug reported:
[Impact]
One example of where this causes a problem is the /dev/disk/by-path symlink.
Multiple SATA disks on the same controller may have the same symlink, making it
useless as a unique identifier.
[Test Case]
On a D05 system w/ SATA disks attached to the onboard SAS controller:
$ cat /sys/class/sas_phy/*/sas_address
And look for non-unique addresses.
[Fix]
Addressed upstream by incorporating the scsi host's ID into the generated fake
SAS address.
[Regression Risk]
Limited to the hisi_sas driver's v2 backend. The only Ubuntu system this driver
supports is the HiSilicon D05, where we can directly test.
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: dann frazier (dannf)
Status: In Progress
** Affects: linux (Ubuntu Bionic)
Importance: Undecided
Assignee: dann frazier (dannf)
Status: In Progress
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Bionic)
Status: New => In Progress
** Changed in: linux (Ubuntu Bionic)
Assignee: (unassigned) => dann frazier (dannf)
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https://bugs.launchpad.net/bugs/1776750
Title:
Fake SAS addresses for SATA disks on HiSilicon D05 are non-unique
Status in linux package in Ubuntu:
In Progress
Status in linux source package in Bionic:
In Progress
Bug description:
[Impact]
One example of where this causes a problem is the /dev/disk/by-path symlink.
Multiple SATA disks on the same controller may have the same symlink, making it
useless as a unique identifier.
[Test Case]
On a D05 system w/ SATA disks attached to the onboard SAS controller:
$ cat /sys/class/sas_phy/*/sas_address
And look for non-unique addresses.
[Fix]
Addressed upstream by incorporating the scsi host's ID into the generated
fake SAS address.
[Regression Risk]
Limited to the hisi_sas driver's v2 backend. The only Ubuntu system this
driver supports is the HiSilicon D05, where we can directly test.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1776750/+subscriptions
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