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| author | David Disseldorp <ddiss@suse.de> | 2018-11-07 16:11:07 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2018-11-22 06:10:36 +0300 |
| commit | b49d6f7885306ee636d5c1af52170f3069ccf5f7 (patch) | |
| tree | 9422920bbe4153c54af39da2e5a0c34c2413677c /include/target | |
| parent | 8d0bb86e2cf6c96d88c3de56a2a29329872c454d (diff) | |
| download | linux-b49d6f7885306ee636d5c1af52170f3069ccf5f7.tar.xz | |
scsi: target: add emulate_pr backstore attr to toggle PR support
The new emulate_pr backstore attribute allows for Persistent Reservation
and SCSI2 RESERVE/RELEASE support to be completely disabled. This can be
useful for scenarios such as:
- Ensuring ATS (Compare & Write) usage on recent VMware ESXi initiators.
- Allowing clustered (e.g. tcm-user) backends to block such requests,
avoiding the multi-node reservation state propagation.
When explicitly disabled, PR and RESERVE/RELEASE requests receive Invalid
Command Operation Code response sense data.
Signed-off-by: David Disseldorp <ddiss@suse.de>
Reviewed-by: Mike Christie <mchristi@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'include/target')
| -rw-r--r-- | include/target/target_core_base.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h index e3bdb0550a59..c15054116b86 100644 --- a/include/target/target_core_base.h +++ b/include/target/target_core_base.h @@ -87,6 +87,8 @@ #define DA_EMULATE_3PC 1 /* No Emulation for PSCSI by default */ #define DA_EMULATE_ALUA 0 +/* Emulate SCSI2 RESERVE/RELEASE and Persistent Reservations by default */ +#define DA_EMULATE_PR 1 /* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */ #define DA_ENFORCE_PR_ISIDS 1 /* Force SPC-3 PR Activate Persistence across Target Power Loss */ @@ -664,6 +666,7 @@ struct se_dev_attrib { int emulate_tpws; int emulate_caw; int emulate_3pc; + int emulate_pr; int pi_prot_format; enum target_prot_type pi_prot_type; enum target_prot_type hw_pi_prot_type; |