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[SCSI] fc_transport: Add an API to allow an LLD to create vports
There's already a fc_vport_termintate() call exported by
the transport. This patch adds a symmetric call to the API to allow
an NPIV-capable LLD to instantiate vports sans user intervention.
Additional comments/updates:
Re: scsi_fc_transport.txt
Add a function prototype for fc_vport_terminate similar to what's
done for fc_vport_create
Re: fc_vport_create
I recommend we pass the channel number in fc_vport_create rather
than fixing it at zero.
Also, ids->vport_type should be set to FC_PORTTYPE_NPIV prior to
calling fc_vport_create. The comment is also meaningless.
Added-by and
Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Andrew Vasquez
James Bottomley
parent
7404ad3b6d
commit
a30c3f69e6
3 changed files with 84 additions and 29 deletions
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@ -436,6 +436,42 @@ Other:
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was updated to remove all vports for the fc_host as well.
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Transport supplied functions
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----------------------------
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The following functions are supplied by the FC-transport for use by LLDs.
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fc_vport_create - create a vport
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fc_vport_terminate - detach and remove a vport
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Details:
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/**
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* fc_vport_create - Admin App or LLDD requests creation of a vport
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* @shost: scsi host the virtual port is connected to.
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* @ids: The world wide names, FC4 port roles, etc for
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* the virtual port.
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*
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* Notes:
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* This routine assumes no locks are held on entry.
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*/
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struct fc_vport *
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fc_vport_create(struct Scsi_Host *shost, struct fc_vport_identifiers *ids)
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/**
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* fc_vport_terminate - Admin App or LLDD requests termination of a vport
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* @vport: fc_vport to be terminated
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*
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* Calls the LLDD vport_delete() function, then deallocates and removes
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* the vport from the shost and object tree.
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*
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* Notes:
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* This routine assumes no locks are held on entry.
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*/
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int
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fc_vport_terminate(struct fc_vport *vport)
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Credits
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=======
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The following people have contributed to this document:
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@ -40,31 +40,7 @@
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static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
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static void fc_vport_sched_delete(struct work_struct *work);
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/*
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* This is a temporary carrier for creating a vport. It will eventually
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* be replaced by a real message definition for sgio or netlink.
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*
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* fc_vport_identifiers: This set of data contains all elements
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* to uniquely identify and instantiate a FC virtual port.
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*
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* Notes:
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* symbolic_name: The driver is to append the symbolic_name string data
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* to the symbolic_node_name data that it generates by default.
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* the resulting combination should then be registered with the switch.
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* It is expected that things like Xen may stuff a VM title into
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* this field.
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*/
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struct fc_vport_identifiers {
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u64 node_name;
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u64 port_name;
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u32 roles;
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bool disable;
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enum fc_port_type vport_type; /* only FC_PORTTYPE_NPIV allowed */
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char symbolic_name[FC_VPORT_SYMBOLIC_NAMELEN];
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};
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static int fc_vport_create(struct Scsi_Host *shost, int channel,
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static int fc_vport_setup(struct Scsi_Host *shost, int channel,
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struct device *pdev, struct fc_vport_identifiers *ids,
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struct fc_vport **vport);
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@ -1760,7 +1736,7 @@ store_fc_host_vport_create(struct device *dev, struct device_attribute *attr,
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vid.disable = false; /* always enabled */
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/* we only allow support on Channel 0 !!! */
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stat = fc_vport_create(shost, 0, &shost->shost_gendev, &vid, &vport);
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stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport);
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return stat ? stat : count;
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}
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static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL,
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@ -3103,7 +3079,7 @@ fc_scsi_scan_rport(struct work_struct *work)
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/**
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* fc_vport_create - allocates and creates a FC virtual port.
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* fc_vport_setup - allocates and creates a FC virtual port.
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* @shost: scsi host the virtual port is connected to.
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* @channel: Channel on shost port connected to.
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* @pdev: parent device for vport
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@ -3118,7 +3094,7 @@ fc_scsi_scan_rport(struct work_struct *work)
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* This routine assumes no locks are held on entry.
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*/
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static int
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fc_vport_create(struct Scsi_Host *shost, int channel, struct device *pdev,
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fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev,
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struct fc_vport_identifiers *ids, struct fc_vport **ret_vport)
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{
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struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
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@ -3231,6 +3207,28 @@ delete_vport:
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return error;
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}
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/**
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* fc_vport_create - Admin App or LLDD requests creation of a vport
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* @shost: scsi host the virtual port is connected to.
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* @channel: channel on shost port connected to.
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* @ids: The world wide names, FC4 port roles, etc for
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* the virtual port.
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*
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* Notes:
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* This routine assumes no locks are held on entry.
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*/
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struct fc_vport *
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fc_vport_create(struct Scsi_Host *shost, int channel,
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struct fc_vport_identifiers *ids)
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{
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int stat;
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struct fc_vport *vport;
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stat = fc_vport_setup(shost, channel, &shost->shost_gendev,
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ids, &vport);
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return stat ? NULL : vport;
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}
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EXPORT_SYMBOL(fc_vport_create);
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/**
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* fc_vport_terminate - Admin App or LLDD requests termination of a vport
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@ -167,6 +167,26 @@ enum fc_tgtid_binding_type {
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struct device_attribute dev_attr_vport_##_name = \
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__ATTR(_name,_mode,_show,_store)
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/*
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* fc_vport_identifiers: This set of data contains all elements
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* to uniquely identify and instantiate a FC virtual port.
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*
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* Notes:
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* symbolic_name: The driver is to append the symbolic_name string data
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* to the symbolic_node_name data that it generates by default.
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* the resulting combination should then be registered with the switch.
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* It is expected that things like Xen may stuff a VM title into
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* this field.
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*/
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#define FC_VPORT_SYMBOLIC_NAMELEN 64
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struct fc_vport_identifiers {
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u64 node_name;
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u64 port_name;
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u32 roles;
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bool disable;
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enum fc_port_type vport_type; /* only FC_PORTTYPE_NPIV allowed */
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char symbolic_name[FC_VPORT_SYMBOLIC_NAMELEN];
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};
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/*
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* FC Virtual Port Attributes
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@ -197,7 +217,6 @@ struct device_attribute dev_attr_vport_##_name = \
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* managed by the transport w/o driver interaction.
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*/
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#define FC_VPORT_SYMBOLIC_NAMELEN 64
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struct fc_vport {
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/* Fixed Attributes */
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@ -732,6 +751,8 @@ void fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
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* be sure to read the Vendor Type and ID formatting requirements
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* specified in scsi_netlink.h
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*/
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struct fc_vport *fc_vport_create(struct Scsi_Host *shost, int channel,
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struct fc_vport_identifiers *);
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int fc_vport_terminate(struct fc_vport *vport);
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#endif /* SCSI_TRANSPORT_FC_H */
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