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target: Fix SPC-2 RELEASE bug for multi-session iSCSI client setups

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This patch addresses a bug in a special case for target core SPC-2 RELEASE
logic where the same physical client (eg: iSCSI InitiatorName) with
differing iSCSI session identifiers (ISID) is allowed to incorrectly release
the same client's SPC-2 reservation from the non reservation holding path.

Note this bug is specific to iscsi-target w/ SPC-2 reservations, and
with the default enforce_pr_isids=1 device attr setting in target-core
controls if a InitiatorName + different ISID reservations are handled
the same as a single iSCSI client entity.

Signed-off-by: Bernhard Kohl <[email protected]>
Cc: <[email protected]>
Signed-off-by: Nicholas Bellinger <[email protected]>
This commit is contained in:
Bernhard Kohl 2012-05-13 23:39:37 +02:00 • committed by Nicholas Bellinger
commit edc318d9fe
1 changed files with 3 additions and 0 deletions
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3
drivers/target/target_core_pr.c
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@ -220,6 +220,9 @@ int target_scsi2_reservation_release(struct se_task *task)
if (dev->dev_reserved_node_acl != sess->se_node_acl)
goto out_unlock;
if (dev->dev_res_bin_isid != sess->sess_bin_isid)
goto out_unlock;
dev->dev_reserved_node_acl = NULL;
dev->dev_flags &= ~DF_SPC2_RESERVATIONS;
if (dev->dev_flags & DF_SPC2_RESERVATIONS_WITH_ISID) {