Move xen patchset to new version's subdir.

[people/pmueller/ipfire-2.x.git] / src / patches / suse-2.6.27.31 / patches.arch / s390-13-02-zfcp_changed_port_did.patch

diff --git a/src/patches/suse-2.6.27.31/patches.arch/s390-13-02-zfcp_changed_port_did.patch b/src/patches/suse-2.6.27.31/patches.arch/s390-13-02-zfcp_changed_port_did.patch
new file mode 100644 (file)
index 0000000..e57b385
--- /dev/null
+++ b/src/patches/suse-2.6.27.31/patches.arch/s390-13-02-zfcp_changed_port_did.patch
@@ -0,0 +1,88 @@
+From: Gerald Schaefer <geraldsc@de.ibm.com>
+Subject: zfcp: unrecoverable port on D_ID change.
+References: bnc#499845,LTC#53175 
+
+Symptom:     Remote storage port remains offline.
+Problem:     If, for whatever reason, the destination ID of a
+             remote storage port changes, it won't become available 
+             again. The problem is that in such a situation the
+             mapping between the WWPN and D_ID is breaking. Since
+             all communication in a SAN is done via the D_ID, the
+             zfcp driver is treating this "new" D_ID as an unknown
+             reference leading to no further action.
+Solution:    Trigger a port reopen in situations which could be
+             the result of a changed D_ID and trigger a port reopen
+             for all ports having no D_ID on RSCN receiption.
+
+Acked-by: John Jolly <jjolly@suse.de>
+
+---
+ drivers/s390/scsi/zfcp_dbf.c |    4 ++--
+ drivers/s390/scsi/zfcp_erp.c |   10 ++++++++--
+ drivers/s390/scsi/zfcp_fc.c  |    7 ++++++-
+ 3 files changed, 16 insertions(+), 5 deletions(-)
+
+Index: linux-sles11/drivers/s390/scsi/zfcp_erp.c
+===================================================================
+--- linux-sles11.orig/drivers/s390/scsi/zfcp_erp.c
++++ linux-sles11/drivers/s390/scsi/zfcp_erp.c
+@@ -892,7 +892,6 @@ static int zfcp_erp_port_strategy_open_c
+               return zfcp_erp_port_strategy_open_port(act);
+ 
+       case ZFCP_ERP_STEP_PORT_OPENING:
+-              /* D_ID might have changed during open */
+               if (p_status & ZFCP_STATUS_COMMON_OPEN) {
+                       if (p_status & ZFCP_STATUS_PORT_DID_DID)
+                               return ZFCP_ERP_SUCCEEDED;
+@@ -900,8 +899,15 @@ static int zfcp_erp_port_strategy_open_c
+                               act->step = ZFCP_ERP_STEP_PORT_CLOSING;
+                               return ZFCP_ERP_CONTINUES;
+                       }
+-              /* fall through otherwise */
+               }
++              if ((atomic_read(&port->status) & ZFCP_STATUS_PORT_DID_DID) &&
++                  !(p_status & ZFCP_STATUS_COMMON_NOESC)) {
++                      atomic_clear_mask(ZFCP_STATUS_PORT_DID_DID,
++                                        &port->status);
++                      _zfcp_erp_port_reopen(port, 0, 56, NULL);
++                      return ZFCP_ERP_EXIT;
++              }
++              /* fall through otherwise */
+       }
+       return ZFCP_ERP_FAILED;
+ }
+Index: linux-sles11/drivers/s390/scsi/zfcp_dbf.c
+===================================================================
+--- linux-sles11.orig/drivers/s390/scsi/zfcp_dbf.c
++++ linux-sles11/drivers/s390/scsi/zfcp_dbf.c
+@@ -545,8 +545,8 @@ static const char *zfcp_rec_dbf_ids[] = 
+       [53]    = "port boxed fcp",
+       [54]    = "unit boxed fcp",
+       [55]    = "port access denied",
+-      [56]    = "",
+-      [57]    = "",
++      [56]    = "port d_id changed",
++      [57]    = "port reopen on RSCN reception",
+       [58]    = "",
+       [59]    = "unit access denied",
+       [60]    = "shared unit access denied open unit",
+Index: linux-sles11/drivers/s390/scsi/zfcp_fc.c
+===================================================================
+--- linux-sles11.orig/drivers/s390/scsi/zfcp_fc.c
++++ linux-sles11/drivers/s390/scsi/zfcp_fc.c
+@@ -127,9 +127,14 @@ static void _zfcp_fc_incoming_rscn(struc
+       struct zfcp_port *port;
+ 
+       read_lock_irqsave(&zfcp_data.config_lock, flags);
+-      list_for_each_entry(port, &fsf_req->adapter->port_list_head, list)
++      list_for_each_entry(port, &fsf_req->adapter->port_list_head, list) {
+               if ((port->d_id & range) == (elem->nport_did & range))
+                       zfcp_test_link(port);
++              if (!(atomic_read(&port->status) & ZFCP_STATUS_PORT_DID_DID))
++                      zfcp_erp_port_reopen(port,
++                                           ZFCP_STATUS_COMMON_ERP_FAILED, 57,
++                                           0);
++      }
+ 
+       read_unlock_irqrestore(&zfcp_data.config_lock, flags);
+ }