Bug 155891 - kernel dm-mpath: Decode any SCSI sense data if no hw_handler
Summary: kernel dm-mpath: Decode any SCSI sense data if no hw_handler
Alias: None
Product: Fedora
Classification: Fedora
Component: device-mapper-multipath
Version: rawhide
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Alasdair Kergon
QA Contact:
Depends On:
TreeView+ depends on / blocked
Reported: 2005-04-25 14:12 UTC by Lars Marowsky-Bree
Modified: 2011-02-09 21:54 UTC (History)
7 users (show)

Fixed In Version:
Doc Type: Enhancement
Doc Text:
Clone Of:
Last Closed: 2011-02-09 21:54:29 UTC
Type: ---

Attachments (Terms of Use)
Proposed patch (890 bytes, patch)
2005-04-26 10:54 UTC, Lars Marowsky-Bree
no flags Details | Diff

Description Lars Marowsky-Bree 2005-04-25 14:12:13 UTC
If no hw-handler is loaded, the dm_scsi_error_handler is never called. Wouldn't
it be sane to always call as the default error decoder it if no explicit
hw-handler is in place? It would only change the default behaviour in case SCSI
sense data was available, so it'd be pretty safe.

Given that probably >90% of all multipath deployments are going to be based on
SCSI, I think that would make a lot of sense.

Comment 1 Lars Marowsky-Bree 2005-04-26 10:54:29 UTC
Created attachment 113662 [details]
Proposed patch

How about this one.

Comment 2 Alasdair Kergon 2005-05-04 13:58:59 UTC
Seems a reasonable thing to do.

Comment 3 Alasdair Kergon 2005-05-04 14:01:19 UTC
If it ever causes problems in the future, we can simply move it into a SCSI
hw_handler and expect userspace to choose it if there isn't a more-specific one
to use.

Comment 4 Alasdair Kergon 2005-05-04 14:07:11 UTC
Adding to next -udm.

Comment 6 Alasdair Kergon 2011-02-09 21:54:29 UTC
Old bz, superceded by hardware handler restructuring

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