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| author | Swen Schillig <swen@vnet.ibm.com> | 2008-10-01 12:42:17 +0200 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@HansenPartnership.com> | 2008-10-03 19:11:53 +0200 |
| commit | 5ab944f97e09a3d52951fe903eed9a7b88d810b2 (patch) | |
| tree | 266171323bd7c5dfc433efd70ca19aafc891598c /drivers/s390/scsi/zfcp_ext.h | |
| parent | [SCSI] zfcp: remove unused references, declarations and flags (diff) | |
| download | linux-5ab944f97e09a3d52951fe903eed9a7b88d810b2.tar.xz linux-5ab944f97e09a3d52951fe903eed9a7b88d810b2.zip | |
[SCSI] zfcp: attach and release SAN nameserver port on demand
Changing the zfcp behaviour from always having the nameserver port
open to an on-demand strategy. This strategy reduces the use of
limited resources like port connections. The patch provides a common
infrastructure which could be used for all WKA ports in future.
Also reduce the number of nameserver lookups by changing the zfcp
behaviour of always querying the nameserver for the corresponding
destination ID of the remote port. If the destination ID has changed
during the reopen process we will be informed and then trigger a
nameserver query on demand.
Signed-off-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 | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/s390/scsi/zfcp_ext.h b/drivers/s390/scsi/zfcp_ext.h index a8dd105dc086..5c8a703b5ce1 100644 --- a/drivers/s390/scsi/zfcp_ext.h +++ b/drivers/s390/scsi/zfcp_ext.h @@ -91,17 +91,21 @@ extern void zfcp_erp_port_access_denied(struct zfcp_port *, u8, void *); extern void zfcp_erp_unit_access_denied(struct zfcp_unit *, u8, void *); extern void zfcp_erp_adapter_access_changed(struct zfcp_adapter *, u8, void *); extern void zfcp_erp_timeout_handler(unsigned long); +extern void zfcp_erp_port_strategy_open_lookup(struct work_struct *); /* zfcp_fc.c */ extern int zfcp_scan_ports(struct zfcp_adapter *); extern void _zfcp_scan_ports_later(struct work_struct *); extern void zfcp_fc_incoming_els(struct zfcp_fsf_req *); -extern int zfcp_fc_ns_gid_pn_request(struct zfcp_erp_action *); +extern int zfcp_fc_ns_gid_pn(struct zfcp_erp_action *); extern void zfcp_fc_plogi_evaluate(struct zfcp_port *, struct fsf_plogi *); extern void zfcp_test_link(struct zfcp_port *); +extern void zfcp_fc_nameserver_init(struct zfcp_adapter *); /* zfcp_fsf.c */ extern int zfcp_fsf_open_port(struct zfcp_erp_action *); +extern int zfcp_fsf_open_wka_port(struct zfcp_wka_port *); +extern int zfcp_fsf_close_wka_port(struct zfcp_wka_port *); extern int zfcp_fsf_close_port(struct zfcp_erp_action *); extern int zfcp_fsf_close_physical_port(struct zfcp_erp_action *); extern int zfcp_fsf_open_unit(struct zfcp_erp_action *); @@ -153,7 +157,6 @@ extern struct fc_function_template zfcp_transport_functions; /* zfcp_sysfs.c */ extern struct attribute_group zfcp_sysfs_unit_attrs; extern struct attribute_group zfcp_sysfs_adapter_attrs; -extern struct attribute_group zfcp_sysfs_ns_port_attrs; extern struct attribute_group zfcp_sysfs_port_attrs; extern struct device_attribute *zfcp_sysfs_sdev_attrs[]; extern struct device_attribute *zfcp_sysfs_shost_attrs[]; |