diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/scsi/libfc/fc_rport.c | 69 |
1 files changed, 50 insertions, 19 deletions
diff --git a/drivers/scsi/libfc/fc_rport.c b/drivers/scsi/libfc/fc_rport.c index 49abb839a223..324e156b5d07 100644 --- a/drivers/scsi/libfc/fc_rport.c +++ b/drivers/scsi/libfc/fc_rport.c @@ -86,6 +86,7 @@ static const char *fc_rport_state_names[] = { [RPORT_ST_LOGO] = "LOGO", [RPORT_ST_ADISC] = "ADISC", [RPORT_ST_DELETE] = "Delete", + [RPORT_ST_RESTART] = "Restart", }; /** @@ -99,8 +100,7 @@ static struct fc_rport_priv *fc_rport_lookup(const struct fc_lport *lport, struct fc_rport_priv *rdata; list_for_each_entry(rdata, &lport->disc.rports, peers) - if (rdata->ids.port_id == port_id && - rdata->rp_state != RPORT_ST_DELETE) + if (rdata->ids.port_id == port_id) return rdata; return NULL; } @@ -235,6 +235,7 @@ static void fc_rport_work(struct work_struct *work) struct fc_rport_operations *rport_ops; struct fc_rport_identifiers ids; struct fc_rport *rport; + int restart = 0; mutex_lock(&rdata->rp_mutex); event = rdata->event; @@ -287,8 +288,19 @@ static void fc_rport_work(struct work_struct *work) mutex_unlock(&rdata->rp_mutex); if (port_id != FC_FID_DIR_SERV) { + /* + * We must drop rp_mutex before taking disc_mutex. + * Re-evaluate state to allow for restart. + * A transition to RESTART state must only happen + * while disc_mutex is held and rdata is on the list. + */ mutex_lock(&lport->disc.disc_mutex); - list_del(&rdata->peers); + mutex_lock(&rdata->rp_mutex); + if (rdata->rp_state == RPORT_ST_RESTART) + restart = 1; + else + list_del(&rdata->peers); + mutex_unlock(&rdata->rp_mutex); mutex_unlock(&lport->disc.disc_mutex); } @@ -312,7 +324,13 @@ static void fc_rport_work(struct work_struct *work) mutex_unlock(&rdata->rp_mutex); fc_remote_port_delete(rport); } - kref_put(&rdata->kref, lport->tt.rport_destroy); + if (restart) { + mutex_lock(&rdata->rp_mutex); + FC_RPORT_DBG(rdata, "work restart\n"); + fc_rport_enter_plogi(rdata); + mutex_unlock(&rdata->rp_mutex); + } else + kref_put(&rdata->kref, lport->tt.rport_destroy); break; default: @@ -342,6 +360,12 @@ int fc_rport_login(struct fc_rport_priv *rdata) FC_RPORT_DBG(rdata, "ADISC port\n"); fc_rport_enter_adisc(rdata); break; + case RPORT_ST_RESTART: + break; + case RPORT_ST_DELETE: + FC_RPORT_DBG(rdata, "Restart deleted port\n"); + fc_rport_state_enter(rdata, RPORT_ST_RESTART); + break; default: FC_RPORT_DBG(rdata, "Login to port\n"); fc_rport_enter_plogi(rdata); @@ -397,20 +421,21 @@ int fc_rport_logoff(struct fc_rport_priv *rdata) if (rdata->rp_state == RPORT_ST_DELETE) { FC_RPORT_DBG(rdata, "Port in Delete state, not removing\n"); - mutex_unlock(&rdata->rp_mutex); goto out; } - fc_rport_enter_logo(rdata); + if (rdata->rp_state == RPORT_ST_RESTART) + FC_RPORT_DBG(rdata, "Port in Restart state, deleting\n"); + else + fc_rport_enter_logo(rdata); /* * Change the state to Delete so that we discard * the response. */ fc_rport_enter_delete(rdata, RPORT_EV_STOP); - mutex_unlock(&rdata->rp_mutex); - out: + mutex_unlock(&rdata->rp_mutex); return 0; } @@ -466,6 +491,7 @@ static void fc_rport_timeout(struct work_struct *work) case RPORT_ST_READY: case RPORT_ST_INIT: case RPORT_ST_DELETE: + case RPORT_ST_RESTART: break; } @@ -499,6 +525,7 @@ static void fc_rport_error(struct fc_rport_priv *rdata, struct fc_frame *fp) fc_rport_enter_logo(rdata); break; case RPORT_ST_DELETE: + case RPORT_ST_RESTART: case RPORT_ST_READY: case RPORT_ST_INIT: break; @@ -1248,6 +1275,7 @@ static void fc_rport_recv_plogi_req(struct fc_lport *lport, } break; case RPORT_ST_PRLI: + case RPORT_ST_RTV: case RPORT_ST_READY: case RPORT_ST_ADISC: FC_RPORT_DBG(rdata, "Received PLOGI in logged-in state %d " @@ -1255,11 +1283,14 @@ static void fc_rport_recv_plogi_req(struct fc_lport *lport, /* XXX TBD - should reset */ break; case RPORT_ST_DELETE: - default: - FC_RPORT_DBG(rdata, "Received PLOGI in unexpected state %d\n", - rdata->rp_state); - fc_frame_free(rx_fp); - goto out; + case RPORT_ST_LOGO: + case RPORT_ST_RESTART: + FC_RPORT_DBG(rdata, "Received PLOGI in state %s - send busy\n", + fc_rport_state(rdata)); + mutex_unlock(&rdata->rp_mutex); + rjt_data.reason = ELS_RJT_BUSY; + rjt_data.explan = ELS_EXPL_NONE; + goto reject; } /* @@ -1510,14 +1541,14 @@ static void fc_rport_recv_logo_req(struct fc_lport *lport, FC_RPORT_DBG(rdata, "Received LOGO request while in state %s\n", fc_rport_state(rdata)); + fc_rport_enter_delete(rdata, RPORT_EV_LOGO); + /* - * If the remote port was created due to discovery, - * log back in. It may have seen a stale RSCN about us. + * If the remote port was created due to discovery, set state + * to log back in. It may have seen a stale RSCN about us. */ - if (rdata->rp_state != RPORT_ST_DELETE && rdata->disc_id) - fc_rport_enter_plogi(rdata); - else - fc_rport_enter_delete(rdata, RPORT_EV_LOGO); + if (rdata->disc_id) + fc_rport_state_enter(rdata, RPORT_ST_RESTART); mutex_unlock(&rdata->rp_mutex); } else FC_RPORT_ID_DBG(lport, sid, |