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authorKashyap, Desai <kashyap.desai@lsi.com>2010-07-26 18:56:21 +0530
committerJames Bottomley <James.Bottomley@suse.de>2010-07-28 09:07:46 -0500
commitc9de7dc48307395fb71780b567ae8833b080d1c8 (patch)
treeb034f8833d64b640d9ef9e3f61191d06b51e5027 /drivers/message
parentb5833cbbd7c2bc3462e684feadd8e6a0ca8e5387 (diff)
downloadlinux-2.6.38-lt-ux500-c9de7dc48307395fb71780b567ae8833b080d1c8.tar.gz
[SCSI] mptfusion: Block Error handling for deleting devices or Device in DMD
Issue description: In multipath topology, when device deletion is in transient state, multipath driver can call blk_flush_queue() as part of path failure. Before device get deleted from OS, Device may go OFFLINE as part of error handling kicked off triggered from multipathing driver. Above condition hits more frequently if device missing delay timer (which is LSI specific firmware parameter) is non zero value. root cause of this issue is Error handling thread is getting kicked off for device which is not really present(in transient state of deleting). This patch has solution for this issue. driver is now using eh_timed_out callback. See below. mptsas_transport_template->eh_timed_out = mptsas_eh_timed_out Using mptsas_eh_timed_out function, driver can decide weather vdevice is under Device missing delay or deleting state. for either of those cases, there is BLK_EH_RESET_TIMER return to scsi mid and error handling thread will not be kicked off for that particular scsi command. Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com> Cc: Stable Tree <stable@kernel.org> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/message')
-rw-r--r--drivers/message/fusion/mptbase.h2
-rw-r--r--drivers/message/fusion/mptsas.c125
-rw-r--r--drivers/message/fusion/mptscsih.c40
3 files changed, 157 insertions, 10 deletions
diff --git a/drivers/message/fusion/mptbase.h b/drivers/message/fusion/mptbase.h
index 0d149c82e76..7f31973b3f7 100644
--- a/drivers/message/fusion/mptbase.h
+++ b/drivers/message/fusion/mptbase.h
@@ -396,6 +396,8 @@ typedef struct _VirtTarget {
u8 raidVolume; /* set, if RAID Volume */
u8 type; /* byte 0 of Inquiry data */
u8 deleted; /* target in process of being removed */
+ u8 inDMD; /* currently in the device
+ removal delay timer */
u32 num_luns;
} VirtTarget;
diff --git a/drivers/message/fusion/mptsas.c b/drivers/message/fusion/mptsas.c
index f705a235300..235113ac08e 100644
--- a/drivers/message/fusion/mptsas.c
+++ b/drivers/message/fusion/mptsas.c
@@ -57,6 +57,7 @@
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_transport_sas.h>
+#include <scsi/scsi_transport.h>
#include <scsi/scsi_dbg.h>
#include "mptbase.h"
@@ -1912,6 +1913,48 @@ mptsas_qcmd(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
return mptscsih_qcmd(SCpnt,done);
}
+/**
+ * mptsas_mptsas_eh_timed_out - resets the scsi_cmnd timeout
+ * if the device under question is currently in the
+ * device removal delay.
+ * @sc: scsi command that the midlayer is about to time out
+ *
+ **/
+static enum blk_eh_timer_return mptsas_eh_timed_out(struct scsi_cmnd *sc)
+{
+ MPT_SCSI_HOST *hd;
+ MPT_ADAPTER *ioc;
+ VirtDevice *vdevice;
+ enum blk_eh_timer_return rc = BLK_EH_NOT_HANDLED;
+
+ hd = shost_priv(sc->device->host);
+ if (hd == NULL) {
+ printk(KERN_ERR MYNAM ": %s: Can't locate host! (sc=%p)\n",
+ __func__, sc);
+ goto done;
+ }
+
+ ioc = hd->ioc;
+ if (ioc->bus_type != SAS) {
+ printk(KERN_ERR MYNAM ": %s: Wrong bus type (sc=%p)\n",
+ __func__, sc);
+ goto done;
+ }
+
+ vdevice = sc->device->hostdata;
+ if (vdevice && vdevice->vtarget && (vdevice->vtarget->inDMD
+ || vdevice->vtarget->deleted)) {
+ dtmprintk(ioc, printk(MYIOC_s_WARN_FMT ": %s: target removed "
+ "or in device removal delay (sc=%p)\n",
+ ioc->name, __func__, sc));
+ rc = BLK_EH_RESET_TIMER;
+ goto done;
+ }
+
+done:
+ return rc;
+}
+
static struct scsi_host_template mptsas_driver_template = {
.module = THIS_MODULE,
@@ -2984,6 +3027,7 @@ static int mptsas_probe_one_phy(struct device *dev,
struct sas_phy *phy;
struct sas_port *port;
int error = 0;
+ VirtTarget *vtarget;
if (!dev) {
error = -ENODEV;
@@ -3206,6 +3250,16 @@ static int mptsas_probe_one_phy(struct device *dev,
rphy_to_expander_device(rphy));
}
+ /* If the device exists,verify it wasn't previously flagged
+ as a missing device. If so, clear it */
+ vtarget = mptsas_find_vtarget(ioc,
+ phy_info->attached.channel,
+ phy_info->attached.id);
+ if (vtarget && vtarget->inDMD) {
+ printk(KERN_INFO "Device returned, unsetting inDMD\n");
+ vtarget->inDMD = 0;
+ }
+
out:
return error;
}
@@ -3659,9 +3713,42 @@ mptsas_send_link_status_event(struct fw_event_work *fw_event)
MPI_SAS_IOUNIT0_RATE_FAILED_SPEED_NEGOTIATION)
phy_info->phy->negotiated_linkrate =
SAS_LINK_RATE_FAILED;
- else
+ else {
phy_info->phy->negotiated_linkrate =
SAS_LINK_RATE_UNKNOWN;
+ if (ioc->device_missing_delay &&
+ mptsas_is_end_device(&phy_info->attached)) {
+ struct scsi_device *sdev;
+ VirtDevice *vdevice;
+ u8 channel, id;
+ id = phy_info->attached.id;
+ channel = phy_info->attached.channel;
+ devtprintk(ioc, printk(MYIOC_s_DEBUG_FMT
+ "Link down for fw_id %d:fw_channel %d\n",
+ ioc->name, phy_info->attached.id,
+ phy_info->attached.channel));
+
+ shost_for_each_device(sdev, ioc->sh) {
+ vdevice = sdev->hostdata;
+ if ((vdevice == NULL) ||
+ (vdevice->vtarget == NULL))
+ continue;
+ if ((vdevice->vtarget->tflags &
+ MPT_TARGET_FLAGS_RAID_COMPONENT ||
+ vdevice->vtarget->raidVolume))
+ continue;
+ if (vdevice->vtarget->id == id &&
+ vdevice->vtarget->channel ==
+ channel)
+ devtprintk(ioc,
+ printk(MYIOC_s_DEBUG_FMT
+ "SDEV OUTSTANDING CMDS"
+ "%d\n", ioc->name,
+ sdev->device_busy));
+ }
+
+ }
+ }
}
out:
mptsas_free_fw_event(ioc, fw_event);
@@ -4906,12 +4993,47 @@ mptsas_event_process(MPT_ADAPTER *ioc, EventNotificationReply_t *reply)
{
EVENT_DATA_SAS_DEVICE_STATUS_CHANGE *sas_event_data =
(EVENT_DATA_SAS_DEVICE_STATUS_CHANGE *)reply->Data;
+ u16 ioc_stat;
+ ioc_stat = le16_to_cpu(reply->IOCStatus);
if (sas_event_data->ReasonCode ==
MPI_EVENT_SAS_DEV_STAT_RC_NOT_RESPONDING) {
mptsas_target_reset_queue(ioc, sas_event_data);
return 0;
}
+ if (sas_event_data->ReasonCode ==
+ MPI_EVENT_SAS_DEV_STAT_RC_INTERNAL_DEVICE_RESET &&
+ ioc->device_missing_delay &&
+ (ioc_stat & MPI_IOCSTATUS_FLAG_LOG_INFO_AVAILABLE)) {
+ VirtTarget *vtarget = NULL;
+ u8 id, channel;
+ u32 log_info = le32_to_cpu(reply->IOCLogInfo);
+
+ id = sas_event_data->TargetID;
+ channel = sas_event_data->Bus;
+
+ vtarget = mptsas_find_vtarget(ioc, channel, id);
+ if (vtarget) {
+ devtprintk(ioc, printk(MYIOC_s_DEBUG_FMT
+ "LogInfo (0x%x) available for "
+ "INTERNAL_DEVICE_RESET"
+ "fw_id %d fw_channel %d\n", ioc->name,
+ log_info, id, channel));
+ if (vtarget->raidVolume) {
+ devtprintk(ioc, printk(MYIOC_s_DEBUG_FMT
+ "Skipping Raid Volume for inDMD\n",
+ ioc->name));
+ } else {
+ devtprintk(ioc, printk(MYIOC_s_DEBUG_FMT
+ "Setting device flag inDMD\n",
+ ioc->name));
+ vtarget->inDMD = 1;
+ }
+
+ }
+
+ }
+
break;
}
case MPI_EVENT_SAS_EXPANDER_STATUS_CHANGE:
@@ -5244,6 +5366,7 @@ mptsas_init(void)
sas_attach_transport(&mptsas_transport_functions);
if (!mptsas_transport_template)
return -ENODEV;
+ mptsas_transport_template->eh_timed_out = mptsas_eh_timed_out;
mptsasDoneCtx = mpt_register(mptscsih_io_done, MPTSAS_DRIVER);
mptsasTaskCtx = mpt_register(mptscsih_taskmgmt_complete, MPTSAS_DRIVER);
diff --git a/drivers/message/fusion/mptscsih.c b/drivers/message/fusion/mptscsih.c
index dceb67a2182..59b8f53d1ec 100644
--- a/drivers/message/fusion/mptscsih.c
+++ b/drivers/message/fusion/mptscsih.c
@@ -664,6 +664,7 @@ mptscsih_io_done(MPT_ADAPTER *ioc, MPT_FRAME_HDR *mf, MPT_FRAME_HDR *mr)
u32 log_info;
status = le16_to_cpu(pScsiReply->IOCStatus) & MPI_IOCSTATUS_MASK;
+
scsi_state = pScsiReply->SCSIState;
scsi_status = pScsiReply->SCSIStatus;
xfer_cnt = le32_to_cpu(pScsiReply->TransferCount);
@@ -738,15 +739,36 @@ mptscsih_io_done(MPT_ADAPTER *ioc, MPT_FRAME_HDR *mf, MPT_FRAME_HDR *mr)
case MPI_IOCSTATUS_SCSI_IOC_TERMINATED: /* 0x004B */
if ( ioc->bus_type == SAS ) {
- u16 ioc_status = le16_to_cpu(pScsiReply->IOCStatus);
- if (ioc_status & MPI_IOCSTATUS_FLAG_LOG_INFO_AVAILABLE) {
- if ((log_info & SAS_LOGINFO_MASK)
- == SAS_LOGINFO_NEXUS_LOSS) {
- sc->result =
- (DID_TRANSPORT_DISRUPTED
- << 16);
- break;
- }
+ u16 ioc_status =
+ le16_to_cpu(pScsiReply->IOCStatus);
+ if ((ioc_status &
+ MPI_IOCSTATUS_FLAG_LOG_INFO_AVAILABLE)
+ &&
+ ((log_info & SAS_LOGINFO_MASK) ==
+ SAS_LOGINFO_NEXUS_LOSS)) {
+ VirtDevice *vdevice =
+ sc->device->hostdata;
+
+ /* flag the device as being in
+ * device removal delay so we can
+ * notify the midlayer to hold off
+ * on timeout eh */
+ if (vdevice && vdevice->
+ vtarget &&
+ vdevice->vtarget->
+ raidVolume)
+ printk(KERN_INFO
+ "Skipping Raid Volume"
+ "for inDMD\n");
+ else if (vdevice &&
+ vdevice->vtarget)
+ vdevice->vtarget->
+ inDMD = 1;
+
+ sc->result =
+ (DID_TRANSPORT_DISRUPTED
+ << 16);
+ break;
}
} else if (ioc->bus_type == FC) {
/*