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  1. 12 4月, 2016 2 次提交
  3. 09 1月, 2015 5 次提交
  5. 03 12月, 2014 1 次提交
  7. 25 11月, 2014 2 次提交
  9. 12 11月, 2014 12 次提交
  11. 10 7月, 2013 1 次提交
    • D
      [SCSI] scsi constants: command, sense key + additional sense strings · 655ee63c
      由 Douglas Gilbert 提交于 
      It has been several years since the SCSI constants.c
file has been updated. The attached is against lk 3.10
and brings the command strings, sense keys and additional
sense code strings into sync with spc4r36g.pdf.

Certain SCSI command names that previously only took the
opcode (i.e. byte 0 of the cdb) into account, have been
split into several command names using the associated
service action field to differentiate. For example,
persistent reservations that previously had 2 commands
(i.e. "in" and "out") have been expanded to 12 commands
(e.g. "Persistent reserve in, read reservation").

Sync SCSI command names, sense key strings and additional
sense code strings with SPC-4 draft revision 36g

[jejb: whitespace fix]
Signed-off-by: NDouglas Gilbert <dgilbert@interlog.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>
      655ee63c
  13. 14 9月, 2012 1 次提交
  15. 10 5月, 2011 1 次提交
  17. 16 4月, 2011 1 次提交
  19. 03 9月, 2010 1 次提交
  21. 20 2月, 2010 2 次提交
  23. 05 12月, 2009 1 次提交
  25. 23 8月, 2009 1 次提交
  27. 13 3月, 2009 1 次提交
  29. 13 10月, 2008 1 次提交
    • M
      [SCSI] scsi: add transport host byte errors (v3) · a4dfaa6f
      由 Mike Christie 提交于 
      Currently, if there is a transport problem the iscsi drivers will return
outstanding commands (commands being exeucted by the driver/fw/hw) with
DID_BUS_BUSY and block the session so no new commands can be queued.
Commands that are caught between the failure handling and blocking are
failed with DID_IMM_RETRY or one of the scsi ml queuecommand return values.
When the recovery_timeout fires, the iscsi drivers then fail IO with
DID_NO_CONNECT.

For fcp, some drivers will fail some outstanding IO (disk but possibly not
tape) with DID_BUS_BUSY or DID_ERROR or some other value that causes a retry
and hits the scsi_error.c failfast check, block the rport, and commands
caught in the race are failed with DID_IMM_RETRY. Other drivers, may
hold onto all IO and wait for the terminate_rport_io or dev_loss_tmo_callbk
to be called.

The following patches attempt to unify what upper layers will see drivers
like multipath can make a good guess. This relies on drivers being
hooked into their transport class.

This first patch just defines two new host byte errors so drivers can
return the same value for when a rport/session is blocked and for
when the fast_io_fail_tmo fires.

The idea is that if the LLD/class detects a problem and is going to block
a rport/session, then if the LLD wants or must return the command to scsi-ml,
then it can return it with DID_TRANSPORT_DISRUPTED. This will requeue
the IO into the same scsi queue it came from, until the fast io fail timer
fires and the class decides what to do.

When using multipath and the fast_io_fail_tmo fires then the class
can fail commands with DID_TRANSPORT_FAILFAST or drivers can use
DID_TRANSPORT_FAILFAST in their terminate_rport_io callbacks or
the equivlent in iscsi if we ever implement more advanced recovery methods.
A LLD, like lpfc, could continue to return DID_ERROR and then it will hit
the normal failfast path, so drivers do not have fully be ported to
work better. The point of the patches is that upper layers will
not see a failure that could be recovered from while the rport/session is
blocked until fast_io_fail_tmo/recovery_timeout fires.

V3
Remove some comments.
V2
Fixed patch/diff errors and renamed DID_TRANSPORT_BLOCKED to
DID_TRANSPORT_DISRUPTED.
V1
initial patch.
Signed-off-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>
      a4dfaa6f
  31. 03 5月, 2008 1 次提交
  33. 12 1月, 2008 2 次提交
  35. 13 10月, 2007 2 次提交
  37. 12 3月, 2007 2 次提交