This is a note to let you know that I've just added the patch titled
iscsi-target: Fix reservation conflict -EBUSY response handling bug
to the 3.2-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
iscsi-target-fix-reservation-conflict-ebusy-response-handling-bug.patch
and it can be found in the queue-3.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 00fdc6bbef77844ce397a7de7acfaf25e8e2e4eb Mon Sep 17 00:00:00 2001
From: Nicholas Bellinger <[email protected]>
Date: Tue, 13 Mar 2012 18:20:11 -0700
Subject: iscsi-target: Fix reservation conflict -EBUSY response handling bug
From: Nicholas Bellinger <[email protected]>
commit 00fdc6bbef77844ce397a7de7acfaf25e8e2e4eb upstream.
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 03e98c9eb916f3f0868c1dc344dde2a60287ff72
Author: Nicholas Bellinger <[email protected]>
Date: Fri Nov 4 02:36:16 2011 -0700
target: Address legacy PYX_TRANSPORT_* return code breakage
Reported-by: Martin Svec <[email protected]>
Cc: Martin Svec <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Signed-off-by: Nicholas Bellinger <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/target/iscsi/iscsi_target.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -1029,7 +1029,7 @@ 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
Patches currently in stable-queue which might be from [email protected] are
queue-3.2/target-fix-compatible-reservation-handling-crh-1-with-legacy-reserve-release.patch
queue-3.2/iscsi-target-fix-reservation-conflict-ebusy-response-handling-bug.patch
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