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[SCSI] fc_transport: add target driver support
This adds minimum target driver support like the srp transport does: - fc_remote_port_{rolechg,delete} calls scsi_tgt_it_nexus_{create,destroy} for target drivers. - add callbacks to notify target drivers of the nexus and tmf operation results to fc_function_template. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
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@ -272,6 +272,13 @@ config SCSI_FC_ATTRS
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each attached FiberChannel device to sysfs, say Y.
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Otherwise, say N.
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config SCSI_FC_TGT_ATTRS
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bool "SCSI target support for FiberChannel Transport Attributes"
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depends on SCSI_FC_ATTRS
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depends on SCSI_TGT = y || SCSI_TGT = SCSI_FC_ATTRS
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help
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If you want to use SCSI target mode drivers enable this option.
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config SCSI_ISCSI_ATTRS
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tristate "iSCSI Transport Attributes"
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depends on SCSI && NET
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@ -36,6 +36,7 @@
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#include <net/netlink.h>
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#include <scsi/scsi_netlink_fc.h>
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#include "scsi_priv.h"
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#include "scsi_transport_fc_internal.h"
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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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@ -1956,6 +1957,19 @@ static int fc_user_scan(struct Scsi_Host *shost, uint channel,
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return 0;
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}
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static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id,
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int result)
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{
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struct fc_internal *i = to_fc_internal(shost->transportt);
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return i->f->tsk_mgmt_response(shost, nexus, tm_id, result);
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}
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static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result)
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{
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struct fc_internal *i = to_fc_internal(shost->transportt);
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return i->f->it_nexus_response(shost, nexus, result);
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}
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struct scsi_transport_template *
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fc_attach_transport(struct fc_function_template *ft)
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{
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@ -1999,6 +2013,10 @@ fc_attach_transport(struct fc_function_template *ft)
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i->t.user_scan = fc_user_scan;
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/* target-mode drivers' functions */
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i->t.tsk_mgmt_response = fc_tsk_mgmt_response;
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i->t.it_nexus_response = fc_it_nexus_response;
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/*
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* Setup SCSI Target Attributes.
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*/
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@ -2756,6 +2774,10 @@ fc_remote_port_delete(struct fc_rport *rport)
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spin_unlock_irqrestore(shost->host_lock, flags);
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if (rport->roles & FC_PORT_ROLE_FCP_INITIATOR &&
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shost->active_mode & MODE_TARGET)
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fc_tgt_it_nexus_destroy(shost, (unsigned long)rport);
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scsi_target_block(&rport->dev);
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/* see if we need to kill io faster than waiting for device loss */
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@ -2796,6 +2818,7 @@ fc_remote_port_rolechg(struct fc_rport *rport, u32 roles)
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struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
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unsigned long flags;
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int create = 0;
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int ret;
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spin_lock_irqsave(shost->host_lock, flags);
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if (roles & FC_PORT_ROLE_FCP_TARGET) {
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@ -2804,6 +2827,12 @@ fc_remote_port_rolechg(struct fc_rport *rport, u32 roles)
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create = 1;
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} else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
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create = 1;
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} else if (shost->active_mode & MODE_TARGET) {
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ret = fc_tgt_it_nexus_create(shost, (unsigned long)rport,
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(char *)&rport->node_name);
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if (ret)
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printk(KERN_ERR "FC Remore Port tgt nexus failed %d\n",
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ret);
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}
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rport->roles = roles;
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26
drivers/scsi/scsi_transport_fc_internal.h
Normal file
26
drivers/scsi/scsi_transport_fc_internal.h
Normal file
@ -0,0 +1,26 @@
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#include <scsi/scsi_tgt.h>
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#ifdef CONFIG_SCSI_FC_TGT_ATTRS
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static inline int fc_tgt_it_nexus_create(struct Scsi_Host *shost, u64 itn_id,
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char *initiator)
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{
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return scsi_tgt_it_nexus_create(shost, itn_id, initiator);
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}
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static inline int fc_tgt_it_nexus_destroy(struct Scsi_Host *shost, u64 itn_id)
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{
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return scsi_tgt_it_nexus_destroy(shost, itn_id);
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}
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#else
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static inline int fc_tgt_it_nexus_create(struct Scsi_Host *shost, u64 itn_id,
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char *initiator)
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{
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return 0;
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}
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static inline int fc_tgt_it_nexus_destroy(struct Scsi_Host *shost, u64 itn_id)
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{
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return 0;
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}
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#endif
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@ -589,6 +589,10 @@ struct fc_function_template {
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int (*vport_disable)(struct fc_vport *, bool);
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int (*vport_delete)(struct fc_vport *);
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/* target-mode drivers' functions */
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int (* tsk_mgmt_response)(struct Scsi_Host *, u64, u64, int);
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int (* it_nexus_response)(struct Scsi_Host *, u64, int);
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/* allocation lengths for host-specific data */
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u32 dd_fcrport_size;
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u32 dd_fcvport_size;
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