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Fix implicit logo and RSCN handling for NVMET

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NVMET didn't have any RSCN handling at all and
would not execute implicit LOGO when receiving a PLOGI
from an rport that NVMET had in state UNMAPPED.

Clean up the logic in lpfc_nlp_state_cleanup for
initiators (FCP and NVME). NVMET should not respond to
RSCN including allocating new ndlps so this code was
conditionalized when nvmet_support is true.  The check
for NLP_RCV_PLOGI in lpfc_setup_disc_node was moved
below the check for nvmet_support to allow the NVMET
to recover initiator nodes correctly.  The implicit
logo was introduced with lpfc_rcv_plogi when NVMET gets
a PLOGI on an ndlp in UNMAPPED state.  The RSCN handling
was modified to not respond to an RSCN in NVMET.  Instead
NVMET sends a GID_FT and determines if an NVMEP_INITIATOR
it has is UNMAPPED but no longer in the zone membership.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
This commit is contained in:
James Smart 2017-04-21 16:05:03 -07:00 committed by Christoph Hellwig
parent aeb3c8170b
commit 1c5b12f763
5 changed files with 111 additions and 53 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

68
drivers/scsi/lpfc/lpfc_ct.c
View File

@ -537,19 +537,53 @@ lpfc_prep_node_fc4type(struct lpfc_vport *vport, uint32_t Did, uint8_t fc4_type)
}
}
static void
lpfc_ns_rsp_audit_did(struct lpfc_vport *vport, uint32_t Did, uint8_t fc4_type)
{
struct lpfc_hba *phba = vport->phba;
struct lpfc_nodelist *ndlp = NULL;
struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
/*
* To conserve rpi's, filter out addresses for other
* vports on the same physical HBAs.
*/
if (Did != vport->fc_myDID &&
(!lpfc_find_vport_by_did(phba, Did) ||
vport->cfg_peer_port_login)) {
if (!phba->nvmet_support) {
/* FCPI/NVMEI path. Process Did */
lpfc_prep_node_fc4type(vport, Did, fc4_type);
return;
}
/* NVMET path. NVMET only cares about NVMEI nodes. */
list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
if (ndlp->nlp_type != NLP_NVME_INITIATOR ||
ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)
continue;
spin_lock_irq(shost->host_lock);
if (ndlp->nlp_DID == Did)
ndlp->nlp_flag &= ~NLP_NVMET_RECOV;
else
ndlp->nlp_flag |= NLP_NVMET_RECOV;
spin_unlock_irq(shost->host_lock);
}
}
}
static int
lpfc_ns_rsp(struct lpfc_vport *vport, struct lpfc_dmabuf *mp, uint8_t fc4_type,
uint32_t Size)
{
struct lpfc_hba *phba = vport->phba;
struct lpfc_sli_ct_request *Response =
(struct lpfc_sli_ct_request *) mp->virt;
struct lpfc_nodelist *ndlp = NULL;
struct lpfc_dmabuf *mlast, *next_mp;
uint32_t *ctptr = (uint32_t *) & Response->un.gid.PortType;
uint32_t Did, CTentry;
int Cnt;
struct list_head head;
struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
struct lpfc_nodelist *ndlp = NULL;
lpfc_set_disctmo(vport);
vport->num_disc_nodes = 0;
@ -574,19 +608,7 @@ lpfc_ns_rsp(struct lpfc_vport *vport, struct lpfc_dmabuf *mp, uint8_t fc4_type,
/* Get next DID from NameServer List */
CTentry = *ctptr++;
Did = ((be32_to_cpu(CTentry)) & Mask_DID);
ndlp = NULL;
/*
* Check for rscn processing or not
* To conserve rpi's, filter out addresses for other
* vports on the same physical HBAs.
*/
if ((Did != vport->fc_myDID) &&
((lpfc_find_vport_by_did(phba, Did) == NULL) ||
vport->cfg_peer_port_login))
lpfc_prep_node_fc4type(vport, Did, fc4_type);
lpfc_ns_rsp_audit_did(vport, Did, fc4_type);
if (CTentry & (cpu_to_be32(SLI_CT_LAST_ENTRY)))
goto nsout1;
@ -596,6 +618,22 @@ lpfc_ns_rsp(struct lpfc_vport *vport, struct lpfc_dmabuf *mp, uint8_t fc4_type,
}
/* All GID_FT entries processed. If the driver is running in
* in target mode, put impacted nodes into recovery and drop
* the RPI to flush outstanding IO.
*/
if (vport->phba->nvmet_support) {
list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
if (!(ndlp->nlp_flag & NLP_NVMET_RECOV))
continue;
lpfc_disc_state_machine(vport, ndlp, NULL,
NLP_EVT_DEVICE_RECOVERY);
spin_lock_irq(shost->host_lock);
ndlp->nlp_flag &= ~NLP_NVMET_RECOV;
spin_lock_irq(shost->host_lock);
}
}
nsout1:
list_del(&head);
return 0;

1
drivers/scsi/lpfc/lpfc_disc.h
View File

@ -157,6 +157,7 @@ struct lpfc_node_rrq {
#define NLP_LOGO_SND 0x00000100 /* sent LOGO request for this entry */
#define NLP_RNID_SND 0x00000400 /* sent RNID request for this entry */
#define NLP_ELS_SND_MASK 0x000007e0 /* sent ELS request for this entry */
#define NLP_NVMET_RECOV 0x00001000 /* NVMET auditing node for recovery. */
#define NLP_DEFER_RM 0x00010000 /* Remove this ndlp if no longer used */
#define NLP_DELAY_TMO 0x00020000 /* delay timeout is running for node */
#define NLP_NPR_2B_DISC 0x00040000 /* node is included in num_disc_nodes */

23
drivers/scsi/lpfc/lpfc_els.c
View File

@ -5861,8 +5861,11 @@ lpfc_rscn_recovery_check(struct lpfc_vport *vport)
(ndlp->nlp_state == NLP_STE_UNUSED_NODE) ||
!lpfc_rscn_payload_check(vport, ndlp->nlp_DID))
continue;
/* NVME Target mode does not do RSCN Recovery. */
if (vport->phba->nvmet_support)
continue;
lpfc_disc_state_machine(vport, ndlp, NULL,
NLP_EVT_DEVICE_RECOVERY);
lpfc_cancel_retry_delay_tmo(vport, ndlp);
@ -6150,22 +6153,16 @@ lpfc_els_handle_rscn(struct lpfc_vport *vport)
ndlp = lpfc_findnode_did(vport, NameServer_DID);
if (ndlp && NLP_CHK_NODE_ACT(ndlp)
&& ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
/* Good ndlp, issue CT Request to NameServer */
/* Good ndlp, issue CT Request to NameServer. Need to
* know how many gidfts were issued. If none, then just
* flush the RSCN. Otherwise, the outstanding requests
* need to complete.
*/
vport->gidft_inp = 0;
if (lpfc_issue_gidft(vport) == 0)
/* Wait for NameServer query cmpl before we can
* continue
*/
if (lpfc_issue_gidft(vport) > 0)
return 1;
} else {
/* If login to NameServer does not exist, issue one */
/* Good status, issue PLOGI to NameServer */
ndlp = lpfc_findnode_did(vport, NameServer_DID);
if (ndlp && NLP_CHK_NODE_ACT(ndlp))
/* Wait for NameServer login cmpl before we can
continue */
return 1;
/* Nameserver login in question. Revalidate. */
if (ndlp) {
ndlp = lpfc_enable_node(vport, ndlp,
NLP_STE_PLOGI_ISSUE);

64
drivers/scsi/lpfc/lpfc_hbadisc.c
View File

@ -4148,7 +4148,6 @@ lpfc_nlp_state_cleanup(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
int old_state, int new_state)
{
struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
struct lpfc_hba *phba = vport->phba;
if (new_state == NLP_STE_UNMAPPED_NODE) {
ndlp->nlp_flag &= ~NLP_NODEV_REMOVE;
@ -4167,14 +4166,14 @@ lpfc_nlp_state_cleanup(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
lpfc_unregister_remote_port(ndlp);
}
/* Notify the NVME transport of this rport's loss */
if (((phba->cfg_enable_fc4_type == LPFC_ENABLE_BOTH) ||
(phba->cfg_enable_fc4_type == LPFC_ENABLE_NVME)) &&
(vport->phba->nvmet_support == 0) &&
((ndlp->nlp_fc4_type & NLP_FC4_NVME) ||
(ndlp->nlp_DID == Fabric_DID))) {
/* Notify the NVME transport of this rport's loss on the
* Initiator. For NVME Target, should upcall transport
* in the else clause when API available.
*/
if (ndlp->nlp_fc4_type & NLP_FC4_NVME) {
vport->phba->nport_event_cnt++;
lpfc_nvme_unregister_port(vport, ndlp);
if (vport->phba->nvmet_support == 0)
lpfc_nvme_unregister_port(vport, ndlp);
}
}
@ -5128,6 +5127,8 @@ lpfc_setup_disc_node(struct lpfc_vport *vport, uint32_t did)
ndlp = lpfc_findnode_did(vport, did);
if (!ndlp) {
if (vport->phba->nvmet_support)
return NULL;
if ((vport->fc_flag & FC_RSCN_MODE) != 0 &&
lpfc_rscn_payload_check(vport, did) == 0)
return NULL;
@ -5135,56 +5136,73 @@ lpfc_setup_disc_node(struct lpfc_vport *vport, uint32_t did)
if (!ndlp)
return NULL;
lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
if (vport->phba->nvmet_support)
return ndlp;
spin_lock_irq(shost->host_lock);
ndlp->nlp_flag |= NLP_NPR_2B_DISC;
spin_unlock_irq(shost->host_lock);
return ndlp;
} else if (!NLP_CHK_NODE_ACT(ndlp)) {
if (vport->phba->nvmet_support)
return NULL;
ndlp = lpfc_enable_node(vport, ndlp, NLP_STE_NPR_NODE);
if (!ndlp)
return NULL;
if (vport->phba->nvmet_support)
return ndlp;
spin_lock_irq(shost->host_lock);
ndlp->nlp_flag |= NLP_NPR_2B_DISC;
spin_unlock_irq(shost->host_lock);
return ndlp;
}
/* The NVME Target does not want to actively manage an rport.
* The goal is to allow the target to reset its state and clear
* pending IO in preparation for the initiator to recover.
*/
if ((vport->fc_flag & FC_RSCN_MODE) &&
!(vport->fc_flag & FC_NDISC_ACTIVE)) {
if (lpfc_rscn_payload_check(vport, did)) {
/* Since this node is marked for discovery,
* delay timeout is not needed.
*/
lpfc_cancel_retry_delay_tmo(vport, ndlp);
/* NVME Target mode waits until rport is known to be
* impacted by the RSCN before it transitions. No
* active management - just go to NPR provided the
* node had a valid login.
*/
if (vport->phba->nvmet_support)
return ndlp;
/* If we've already received a PLOGI from this NPort
* we don't need to try to discover it again.
*/
if (ndlp->nlp_flag & NLP_RCV_PLOGI)
return NULL;
/* Since this node is marked for discovery,
* delay timeout is not needed.
*/
lpfc_cancel_retry_delay_tmo(vport, ndlp);
if (vport->phba->nvmet_support)
return ndlp;
spin_lock_irq(shost->host_lock);
ndlp->nlp_flag |= NLP_NPR_2B_DISC;
spin_unlock_irq(shost->host_lock);
} else
ndlp = NULL;
} else {
/* If we've already received a PLOGI from this NPort,
* or we are already in the process of discovery on it,
* we don't need to try to discover it again.
/* If the initiator received a PLOGI from this NPort or if the
* initiator is already in the process of discovery on it,
* there's no need to try to discover it again.
*/
if (ndlp->nlp_state == NLP_STE_ADISC_ISSUE ||
ndlp->nlp_state == NLP_STE_PLOGI_ISSUE ||
ndlp->nlp_flag & NLP_RCV_PLOGI)
(!vport->phba->nvmet_support &&
ndlp->nlp_flag & NLP_RCV_PLOGI))
return NULL;
lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
if (vport->phba->nvmet_support)
return ndlp;
/* Moving to NPR state clears unsolicited flags and
* allows for rediscovery
*/
lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
spin_lock_irq(shost->host_lock);
ndlp->nlp_flag |= NLP_NPR_2B_DISC;
spin_unlock_irq(shost->host_lock);

8
drivers/scsi/lpfc/lpfc_nportdisc.c
View File

@ -361,8 +361,12 @@ lpfc_rcv_plogi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
case NLP_STE_PRLI_ISSUE:
case NLP_STE_UNMAPPED_NODE:
case NLP_STE_MAPPED_NODE:
/* lpfc_plogi_confirm_nport skips fabric did, handle it here */
if (!(ndlp->nlp_type & NLP_FABRIC)) {
/* For initiators, lpfc_plogi_confirm_nport skips fabric did.
* For target mode, execute implicit logo.
* Fabric nodes go into NPR.
*/
if (!(ndlp->nlp_type & NLP_FABRIC) &&
!(phba->nvmet_support)) {
lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb,
ndlp, NULL);
return 1;