This is a note to let you know that I've just added the patch titled
target: Fix assignment of LUN in tracepoints
to the 3.11-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:
target-fix-assignment-of-lun-in-tracepoints.patch
and it can be found in the queue-3.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 2053a1db41193c2b5e1f47a91aaba0fd63ba7102 Mon Sep 17 00:00:00 2001
From: Roland Dreier <roland@xxxxxxxxxxxxxxx>
Date: Tue, 8 Oct 2013 09:47:22 -0700
Subject: target: Fix assignment of LUN in tracepoints
From: Roland Dreier <roland@xxxxxxxxxxxxxxx>
commit 2053a1db41193c2b5e1f47a91aaba0fd63ba7102 upstream.
The unpacked_lun field in the SCSI target tracepoints should be
initialized with cmd->orig_fe_lun rather than cmd->se_lun->unpacked_lun
for two reasons:
- most importantly, if we are in the cmd_complete tracepoint
returning a check condition due to no LUN found, cmd->se_lun will
be NULL and we'll crash trying to dereference it.
- also, in any case, cmd->se_lun->unpacked_lun is an internal index
into the target's internal set of LUNs; cmd->orig_fe_lun is much
more useful and interesting, since it's the value the initiator
actually sent.
Signed-off-by: Roland Dreier <roland@xxxxxxxxxxxxxxx>
Signed-off-by: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
include/trace/events/target.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/include/trace/events/target.h
+++ b/include/trace/events/target.h
@@ -144,7 +144,7 @@ TRACE_EVENT(target_sequencer_start,
),
TP_fast_assign(
- __entry->unpacked_lun = cmd->se_lun->unpacked_lun;
+ __entry->unpacked_lun = cmd->orig_fe_lun;
__entry->opcode = cmd->t_task_cdb[0];
__entry->data_length = cmd->data_length;
__entry->task_attribute = cmd->sam_task_attr;
@@ -182,7 +182,7 @@ TRACE_EVENT(target_cmd_complete,
),
TP_fast_assign(
- __entry->unpacked_lun = cmd->se_lun->unpacked_lun;
+ __entry->unpacked_lun = cmd->orig_fe_lun;
__entry->opcode = cmd->t_task_cdb[0];
__entry->data_length = cmd->data_length;
__entry->task_attribute = cmd->sam_task_attr;
Patches currently in stable-queue which might be from roland@xxxxxxxxxxxxxxx are
queue-3.11/target-fix-assignment-of-lun-in-tracepoints.patch
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