From: Hannes Reinecke <hare@suse.de>
To: James Bottomley <jbottomley@parallels.com>
Cc: Sean Stewart <sean.stewart@netapp.com>,
Martin George <marting@netapp.com>,
linux-scsi@vger.kernel.org, Hannes Reinecke <hare@suse.de>
Subject: [PATCH 02/16] scsi_dh_alua: use flag for RTPG extended header
Date: Fri, 31 Jan 2014 10:29:46 +0100 [thread overview]
Message-ID: <1391160600-19652-3-git-send-email-hare@suse.de> (raw)
In-Reply-To: <1391160600-19652-1-git-send-email-hare@suse.de>
We should be using a flag when RTPG extended header is not
supported, that saves us sending RTPG twice for older arrays.
Signed-off-by: Hannes Reinecke <hare@suse.de>
---
drivers/scsi/device_handler/scsi_dh_alua.c | 13 ++++++-------
1 file changed, 6 insertions(+), 7 deletions(-)
diff --git a/drivers/scsi/device_handler/scsi_dh_alua.c b/drivers/scsi/device_handler/scsi_dh_alua.c
index e4e5497..ece2255 100644
--- a/drivers/scsi/device_handler/scsi_dh_alua.c
+++ b/drivers/scsi/device_handler/scsi_dh_alua.c
@@ -61,6 +61,7 @@
/* flags passed from user level */
#define ALUA_OPTIMIZE_STPG 1
+#define ALUA_RTPG_EXT_HDR_UNSUPP 2
struct alua_dh_data {
int group_id;
@@ -181,8 +182,7 @@ done:
* submit_rtpg - Issue a REPORT TARGET GROUP STATES command
* @sdev: sdev the command should be sent to
*/
-static unsigned submit_rtpg(struct scsi_device *sdev, struct alua_dh_data *h,
- bool rtpg_ext_hdr_req)
+static unsigned submit_rtpg(struct scsi_device *sdev, struct alua_dh_data *h)
{
struct request *rq;
int err;
@@ -195,7 +195,7 @@ static unsigned submit_rtpg(struct scsi_device *sdev, struct alua_dh_data *h,
/* Prepare the command. */
rq->cmd[0] = MAINTENANCE_IN;
- if (rtpg_ext_hdr_req)
+ if (!(h->flags & ALUA_RTPG_EXT_HDR_UNSUPP))
rq->cmd[1] = MI_REPORT_TARGET_PGS | MI_EXT_HDR_PARAM_FMT;
else
rq->cmd[1] = MI_REPORT_TARGET_PGS;
@@ -565,7 +565,6 @@ static int alua_rtpg(struct scsi_device *sdev, struct alua_dh_data *h, int wait_
int len, k, off, valid_states = 0;
unsigned char *ucp;
unsigned err, retval;
- bool rtpg_ext_hdr_req = 1;
unsigned long expiry, interval = 0;
unsigned int tpg_desc_tbl_off;
unsigned char orig_transition_tmo;
@@ -576,7 +575,7 @@ static int alua_rtpg(struct scsi_device *sdev, struct alua_dh_data *h, int wait_
expiry = round_jiffies_up(jiffies + h->transition_tmo * HZ);
retry:
- retval = submit_rtpg(sdev, h, rtpg_ext_hdr_req);
+ retval = submit_rtpg(sdev, h);
if (retval) {
if (h->senselen == 0 ||
@@ -600,10 +599,10 @@ static int alua_rtpg(struct scsi_device *sdev, struct alua_dh_data *h, int wait_
* The retry without rtpg_ext_hdr_req set
* handles this.
*/
- if (rtpg_ext_hdr_req == 1 &&
+ if (!(h->flags & ALUA_RTPG_EXT_HDR_UNSUPP) &&
sense_hdr.sense_key == ILLEGAL_REQUEST &&
sense_hdr.asc == 0x24 && sense_hdr.ascq == 0) {
- rtpg_ext_hdr_req = 0;
+ h->flags |= ALUA_RTPG_EXT_HDR_UNSUPP;
goto retry;
}
--
1.7.12.4
next prev parent reply other threads:[~2014-01-31 9:30 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-31 9:29 [PATCHv2 00/16] scsi_dh_alua updates Hannes Reinecke
2014-01-31 9:29 ` [PATCH 01/16] scsi_dh_alua: Improve error handling Hannes Reinecke
2014-02-14 11:16 ` Bart Van Assche
2014-02-14 11:32 ` Hannes Reinecke
2014-03-06 23:43 ` Jeremy Linton
2014-03-07 7:12 ` Hannes Reinecke
2014-03-07 15:46 ` Jeremy Linton
2014-01-31 9:29 ` Hannes Reinecke [this message]
2014-01-31 9:29 ` [PATCH 03/16] scsi_dh_alua: Pass buffer as function argument Hannes Reinecke
2014-02-14 11:22 ` Bart Van Assche
2014-02-14 11:36 ` Hannes Reinecke
2014-01-31 9:29 ` [PATCH 04/16] scsi_dh_alua: Make stpg synchronous Hannes Reinecke
2014-02-07 1:24 ` Mike Christie
2014-02-07 1:54 ` Mike Christie
2014-02-12 15:29 ` Hannes Reinecke
2014-02-12 16:11 ` Mike Christie
2014-02-12 16:26 ` Mike Christie
2014-02-12 17:31 ` Mike Christie
2014-02-13 9:31 ` Hannes Reinecke
2014-02-14 11:37 ` Bart Van Assche
2014-02-14 11:53 ` Hannes Reinecke
2014-02-14 18:21 ` Mike Christie
2014-02-19 8:09 ` Hannes Reinecke
2014-02-14 17:17 ` Mike Christie
2014-02-14 11:27 ` Bart Van Assche
2014-02-14 11:38 ` Hannes Reinecke
2014-01-31 9:29 ` [PATCH 05/16] scsi_dh_alua: put sense buffer on stack Hannes Reinecke
2014-01-31 9:29 ` [PATCH 06/16] scsi_dh_alua: use local buffer for VPD inquiry Hannes Reinecke
2014-02-13 9:51 ` Maurizio Lombardi
2014-02-13 10:10 ` Hannes Reinecke
2014-02-14 11:41 ` Bart Van Assche
2014-01-31 9:29 ` [PATCH 07/16] scsi_dh_alua: Use separate alua_port_group structure Hannes Reinecke
2014-02-14 11:56 ` Bart Van Assche
2014-02-14 12:16 ` Hannes Reinecke
2014-02-14 16:12 ` Hannes Reinecke
2014-02-14 17:42 ` Bart Van Assche
2014-01-31 9:29 ` [PATCH 08/16] scsi_dh_alua: parse target device id Hannes Reinecke
2014-02-14 12:09 ` Bart Van Assche
2014-02-14 12:21 ` Hannes Reinecke
2014-02-17 14:05 ` Bart Van Assche
2014-02-17 14:09 ` Hannes Reinecke
2014-02-17 14:27 ` Bart Van Assche
2014-02-17 14:33 ` Hannes Reinecke
2014-02-18 7:26 ` Bart Van Assche
2014-01-31 9:29 ` [PATCH 09/16] scsi_dh_alua: simplify sense code handling Hannes Reinecke
2014-01-31 9:29 ` [PATCH 10/16] scsi_dh_alua: Do not attach to management devices Hannes Reinecke
2014-01-31 9:29 ` [PATCH 11/16] scsi_dh_alua: multipath failover fails with error 15 Hannes Reinecke
2015-03-30 12:30 ` Bart Van Assche
2015-03-30 12:32 ` Hannes Reinecke
2014-01-31 9:29 ` [PATCH 12/16] scsi_dh: return individual errors in scsi_dh_activate() Hannes Reinecke
2014-01-31 9:29 ` [PATCH 13/16] scsi_dh_alua: Clarify logging message Hannes Reinecke
2014-01-31 9:29 ` [PATCH 14/16] scsi_dh: invoke callback if ->activate is not present Hannes Reinecke
2014-01-31 9:29 ` [PATCH 15/16] scsi_dh_alua: revert commit a8e5a2d593cbfccf530c3382c2c328d2edaa7b66 Hannes Reinecke
2014-01-31 9:30 ` [PATCH 16/16] scsi_dh_alua: Use workqueue for RTPG Hannes Reinecke
2014-02-14 19:03 ` Bart Van Assche
2014-04-29 21:47 ` Stewart, Sean
2014-05-08 7:04 ` Hannes Reinecke
2014-03-02 9:10 ` [PATCHv2 00/16] scsi_dh_alua updates Bart Van Assche
-- strict thread matches above, loose matches on Subject: below --
2013-12-20 12:13 [PATCH " Hannes Reinecke
2013-12-20 12:13 ` [PATCH 02/16] scsi_dh_alua: use flag for RTPG extended header Hannes Reinecke
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