From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
This patch addresses a iscsi-target specific bug related to reservation conflict
handling in iscsit_handle_scsi_cmd() that has been causing reservation conflicts
to complete and not fail as expected due to incorrect errno checking. The problem
occured with the change to return -EBUSY from transport_generic_cmd_sequencer() ->
transport_generic_allocate_tasks() failures, that broke iscsit_handle_scsi_cmd()
checking for -EINVAL in order to invoke a non GOOD status response.
This was manifesting itself as data corruption with legacy SPC-2 reservations,
but also effects iscsi-target LUNs with SPC-3 persistent reservations.
This bug was originally introduced in lio-core commit:
commit e9db8f17017f8dff0c322f61f78acc85750311dc
Author: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
Date: Fri Nov 4 02:36:16 2011 -0700
target: Removal legacy PYX_TRANSPORT_* return code usage
Reported-by: Martin Svec <martin.svec@xxxxxxxx>
Cc: Martin Svec <martin.svec@xxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
---
drivers/target/iscsi/iscsi_target.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index d3b54ec..b6ba40c 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -1026,7 +1026,7 @@ done:
return iscsit_add_reject_from_cmd(
ISCSI_REASON_BOOKMARK_NO_RESOURCES,
1, 1, buf, cmd);
- } else if (transport_ret == -EINVAL) {
+ } else if (transport_ret < 0) {
/*
* Unsupported SAM Opcode. CHECK_CONDITION will be sent
* in iscsit_execute_cmd() during the CmdSN OOO Execution
--
1.7.2.5
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