[Scst-devel] Persitent reservations

[Aleksey Y. <ale...@gm...>]

Hi SCST-experts,

Where does the SCST store persistent reservation info? I've managed to
create a (surviving power loss) reservation using the "sg_persist" utility,
but now I can't clear it.

xxx@ubuntu:~$ sudo sg_persist /dev/sdb -c
  MYCOMP   MYDISK          3.23
  Peripheral device type: disk
Report capabilities response:
  Compatible Reservation Handling(CRH): 1
  Specify Initiator Ports Capable(SIP_C): 1
  All Target Ports Capable(ATP_C): 1
  Persist Through Power Loss Capable(PTPL_C): 1
  Type Mask Valid(TMV): 1
  Allow Commands: 4
  Persist Through Power Loss Active(PTPL_A): 0
    Support indicated in Type mask:
      Write Exclusive, all registrants: 1
      Exclusive Access, registrants only: 1
      Write Exclusive, registrants only: 1
      Exclusive Access: 1
      Write Exclusive: 1
      Exclusive Access, all registrants: 1

xxx@ubuntu:~$ sudo sg_persist /dev/sdb -s
  MYCOMP   MYDISK          3.23
  Peripheral device type: disk
  PR generation=0x0
  No full status descriptors

xxx@ubuntu:~$ sudo sg_persist /dev/sdb -K 0x123 -L -o
warning>>> --prout-type probably needs to be given
  MYCOMP   MYDISK          3.23
  Peripheral device type: disk
persistent reserve out: scsi status: Reservation Conflict
PR out: command failed

It looks wrong to me - the target shows "no descriptors" but the release
command (option -L)
fails.

Could you also please disclose your test scripts which you normally use in
persistent reservation testing?

Thank you,
Aleksey