diff options
author | Christof Schmitt <christof.schmitt@de.ibm.com> | 2009-03-02 12:09:08 (GMT) |
---|---|---|
committer | James Bottomley <James.Bottomley@HansenPartnership.com> | 2009-03-12 17:58:21 (GMT) |
commit | a2fa0aede07c9488239dcac1eae58233181c355a (patch) | |
tree | 406836319208a5f8597010b0f25f599eae922e66 /drivers/s390/scsi/zfcp_ext.h | |
parent | 24095490681d130979c18685dc0b5a308057e225 (diff) | |
download | linux-a2fa0aede07c9488239dcac1eae58233181c355a.tar.xz |
[SCSI] zfcp: Block FC transport rports early on errors
Use the I/O blocking mechanism in the FC transport class to allow
faster failovers for multipathing:
- Call fc_remote_port_delete early to set the rport to BLOCKED.
- Check the rport status in queuecommand with fc_remote_portchkready
to no longer accept new I/O for this port and fail the I/O with the
appropriate scsi_cmnd result.
- Implement the terminate_rport_io handler to abort all pending I/O
requests
- Return SCSI commands with DID_TRANSPORT_DISRUPTED while erp is
running.
- When updating the remote port status, check for late changes and
update the remote ports status accordingly.
Acked-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers/s390/scsi/zfcp_ext.h')
-rw-r--r-- | drivers/s390/scsi/zfcp_ext.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/s390/scsi/zfcp_ext.h b/drivers/s390/scsi/zfcp_ext.h index 569d243..f6399ca 100644 --- a/drivers/s390/scsi/zfcp_ext.h +++ b/drivers/s390/scsi/zfcp_ext.h @@ -3,7 +3,7 @@ * * External function declarations. * - * Copyright IBM Corporation 2002, 2008 + * Copyright IBM Corporation 2002, 2009 */ #ifndef ZFCP_EXT_H @@ -154,6 +154,10 @@ extern int zfcp_adapter_scsi_register(struct zfcp_adapter *); extern void zfcp_adapter_scsi_unregister(struct zfcp_adapter *); extern char *zfcp_get_fcp_sns_info_ptr(struct fcp_rsp_iu *); extern struct fc_function_template zfcp_transport_functions; +extern void zfcp_scsi_rport_work(struct work_struct *); +extern void zfcp_scsi_schedule_rport_register(struct zfcp_port *); +extern void zfcp_scsi_schedule_rport_block(struct zfcp_port *); +extern void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *); /* zfcp_sysfs.c */ extern struct attribute_group zfcp_sysfs_unit_attrs; |