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Message-ID: <26A27AC7-401E-4560-89C3-458F1611BD14@cavium.com>
Date: Wed, 7 Jun 2017 01:12:57 +0000
From: "Tran, Quinn" <Quinn.Tran@...ium.com>
To: "Nicholas A. Bellinger" <nab@...ux-iscsi.org>,
target-devel <target-devel@...r.kernel.org>
CC: linux-scsi <linux-scsi@...r.kernel.org>,
lkml <linux-kernel@...r.kernel.org>,
"Madhani, Himanshu" <Himanshu.Madhani@...ium.com>,
Mike Christie <mchristi@...hat.com>,
Hannes Reinecke <hare@...e.com>, Christoph Hellwig <hch@....de>
Subject: Re: [PATCH 3/3] qla2xxx: Convert QLA_TGT_ABTS to
TARGET_SCF_LOOKUP_LUN_FROM_TAG
Nic,
Thanks. It looks good.
Regards,
Quinn Tran
-----Original Message-----
From: Nicholas Bellinger <nab@...ux-iscsi.org>
Date: Saturday, June 3, 2017 at 3:10 PM
To: target-devel <target-devel@...r.kernel.org>
Cc: linux-scsi <linux-scsi@...r.kernel.org>, lkml <linux-kernel@...r.kernel.org>, Nicholas Bellinger <nab@...ux-iscsi.org>, "Madhani, Himanshu" <Himanshu.Madhani@...ium.com>, "Tran, Quinn" <Quinn.Tran@...ium.com>, Mike Christie <mchristi@...hat.com>, Hannes Reinecke <hare@...e.com>, Christoph Hellwig <hch@....de>
Subject: [PATCH 3/3] qla2xxx: Convert QLA_TGT_ABTS to TARGET_SCF_LOOKUP_LUN_FROM_TAG
From: Nicholas Bellinger <nab@...ux-iscsi.org>
Following Himanshu's earlier patch to drop the redundant tag
lookup within __qlt_24xx_handle_abts(), go ahead and drop this
now QLA_TGT_ABTS can use TARGET_SCF_LOOKUP_LUN_FROM_TAG and
have target_submit_tmr() do this from common code.
Cc: Himanshu Madhani <himanshu.madhani@...ium.com>
Cc: Quinn Tran <quinn.tran@...ium.com>
Cc: Mike Christie <mchristi@...hat.com>
Cc: Hannes Reinecke <hare@...e.com>
Cc: Christoph Hellwig <hch@....de>
Signed-off-by: Nicholas Bellinger <nab@...ux-iscsi.org>
---
drivers/scsi/qla2xxx/qla_target.c | 39 +++++++++-----------------------------
drivers/scsi/qla2xxx/tcm_qla2xxx.c | 4 +++-
2 files changed, 12 insertions(+), 31 deletions(-)
diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c
index 0e03ca2..401e245 100644
--- a/drivers/scsi/qla2xxx/qla_target.c
+++ b/drivers/scsi/qla2xxx/qla_target.c
@@ -1847,38 +1847,13 @@ static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
struct abts_recv_from_24xx *abts, struct fc_port *sess)
{
struct qla_hw_data *ha = vha->hw;
- struct se_session *se_sess = sess->se_sess;
struct qla_tgt_mgmt_cmd *mcmd;
- struct se_cmd *se_cmd;
- u32 lun = 0;
int rc;
- bool found_lun = false;
- unsigned long flags;
-
- spin_lock_irqsave(&se_sess->sess_cmd_lock, flags);
- list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
- struct qla_tgt_cmd *cmd =
- container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
- if (se_cmd->tag == abts->exchange_addr_to_abort) {
- lun = cmd->unpacked_lun;
- found_lun = true;
- break;
- }
- }
- spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
- /* cmd not in LIO lists, look in qla list */
- if (!found_lun) {
- if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) {
- /* send TASK_ABORT response immediately */
- qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_CMPL, false);
- return 0;
- } else {
- ql_dbg(ql_dbg_tgt_mgt, vha, 0xf081,
- "unable to find cmd in driver or LIO for tag 0x%x\n",
- abts->exchange_addr_to_abort);
- return -ENOENT;
- }
+ if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) {
+ /* send TASK_ABORT response immediately */
+ qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_CMPL, false);
+ return 0;
}
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
@@ -1899,7 +1874,11 @@ static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
mcmd->reset_count = vha->hw->chip_reset;
mcmd->tmr_func = QLA_TGT_ABTS;
- rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, mcmd->tmr_func,
+ /*
+ * LUN is looked up by target-core internally based on the passed
+ * abts->exchange_addr_to_abort tag.
+ */
+ rc = ha->tgt.tgt_ops->handle_tmr(mcmd, 0, mcmd->tmr_func,
abts->exchange_addr_to_abort);
if (rc != 0) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
diff --git a/drivers/scsi/qla2xxx/tcm_qla2xxx.c b/drivers/scsi/qla2xxx/tcm_qla2xxx.c
index 7443e4e..75aeb9f 100644
--- a/drivers/scsi/qla2xxx/tcm_qla2xxx.c
+++ b/drivers/scsi/qla2xxx/tcm_qla2xxx.c
@@ -601,11 +601,13 @@ static int tcm_qla2xxx_handle_tmr(struct qla_tgt_mgmt_cmd *mcmd, uint32_t lun,
struct fc_port *sess = mcmd->sess;
struct se_cmd *se_cmd = &mcmd->se_cmd;
int transl_tmr_func = 0;
+ int flags = TARGET_SCF_ACK_KREF;
switch (tmr_func) {
case QLA_TGT_ABTS:
pr_debug("%ld: ABTS received\n", sess->vha->host_no);
transl_tmr_func = TMR_ABORT_TASK;
+ flags |= TARGET_SCF_LOOKUP_LUN_FROM_TAG;
break;
case QLA_TGT_2G_ABORT_TASK:
pr_debug("%ld: 2G Abort Task received\n", sess->vha->host_no);
@@ -638,7 +640,7 @@ static int tcm_qla2xxx_handle_tmr(struct qla_tgt_mgmt_cmd *mcmd, uint32_t lun,
}
return target_submit_tmr(se_cmd, sess->se_sess, NULL, lun, mcmd,
- transl_tmr_func, GFP_ATOMIC, tag, TARGET_SCF_ACK_KREF);
+ transl_tmr_func, GFP_ATOMIC, tag, flags);
}
static int tcm_qla2xxx_queue_data_in(struct se_cmd *se_cmd)
--
1.9.1
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