Signed-off-by: Hannes Reinecke <hare@xxxxxxxx>
Acked-by: Johannes Thumshirn <jth@xxxxxxxxxx>
---
drivers/scsi/libfc/fc_exch.c | 59 +++++++++++++++++++++++++++++++++++--------
drivers/scsi/libfc/fc_fcp.c | 41 ++++++++++++++++++++++++------
drivers/scsi/libfc/fc_rport.c | 25 ++++++++++++++----
3 files changed, 101 insertions(+), 24 deletions(-)
diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c
index 16ca31a..b4bdc90 100644
--- a/drivers/scsi/libfc/fc_exch.c
+++ b/drivers/scsi/libfc/fc_exch.c
@@ -362,8 +362,10 @@ static inline void fc_exch_timer_set_locked(struct fc_exch *ep,
fc_exch_hold(ep); /* hold for timer */
if (!queue_delayed_work(fc_exch_workqueue, &ep->timeout_work,
- msecs_to_jiffies(timer_msec)))
+ msecs_to_jiffies(timer_msec))) {
+ FC_EXCH_DBG(ep, "Exchange already queued\n");
fc_exch_release(ep);
+ }
}
/**
@@ -632,9 +634,13 @@ static int fc_exch_abort_locked(struct fc_exch *ep,
struct fc_frame *fp;
int error;
+ FC_EXCH_DBG(ep, "exch: abort, time %d msecs\n", timer_msec);
if (ep->esb_stat & (ESB_ST_COMPLETE | ESB_ST_ABNORMAL) ||
- ep->state & (FC_EX_DONE | FC_EX_RST_CLEANUP))
+ ep->state & (FC_EX_DONE | FC_EX_RST_CLEANUP)) {
+ FC_EXCH_DBG(ep, "exch: already completed esb %x state %x\n",
+ ep->esb_stat, ep->state);
return -ENXIO;
+ }
/*
* Send the abort on a new sequence if possible.
@@ -758,7 +764,7 @@ static void fc_exch_timeout(struct work_struct *work)
u32 e_stat;
int rc = 1;
- FC_EXCH_DBG(ep, "Exchange timed out\n");
+ FC_EXCH_DBG(ep, "Exchange timed out state %x\n", ep->state);
spin_lock_bh(&ep->ex_lock);
if (ep->state & (FC_EX_RST_CLEANUP | FC_EX_DONE))
@@ -1258,8 +1264,10 @@ static void fc_seq_send_ack(struct fc_seq *sp, const struct fc_frame *rx_fp)
*/
if (fc_sof_needs_ack(fr_sof(rx_fp))) {
fp = fc_frame_alloc(lport, 0);
- if (!fp)
+ if (!fp) {
+ FC_EXCH_DBG(ep, "Drop ACK request, out of memory\n");
return;
+ }
fh = fc_frame_header_get(fp);
fh->fh_r_ctl = FC_RCTL_ACK_1;
@@ -1312,13 +1320,18 @@ static void fc_exch_send_ba_rjt(struct fc_frame *rx_fp,
struct fc_frame_header *rx_fh;
struct fc_frame_header *fh;
struct fc_ba_rjt *rp;
+ struct fc_seq *sp;
struct fc_lport *lport;
unsigned int f_ctl;
lport = fr_dev(rx_fp);
+ sp = fr_seq(rx_fp);
fp = fc_frame_alloc(lport, sizeof(*rp));
- if (!fp)
+ if (!fp) {
+ FC_EXCH_DBG(fc_seq_exch(sp),
+ "Drop BA_RJT request, out of memory\n");
return;
+ }
fh = fc_frame_header_get(fp);
rx_fh = fc_frame_header_get(rx_fp);
@@ -1383,14 +1396,17 @@ static void fc_exch_recv_abts(struct fc_exch *ep, struct fc_frame *rx_fp)
if (!ep)
goto reject;
+ FC_EXCH_DBG(ep, "exch: ABTS received\n");
fp = fc_frame_alloc(ep->lp, sizeof(*ap));
- if (!fp)
+ if (!fp) {
+ FC_EXCH_DBG(ep, "Drop ABTS request, out of memory\n");
goto free;
+ }
spin_lock_bh(&ep->ex_lock);
if (ep->esb_stat & ESB_ST_COMPLETE) {
spin_unlock_bh(&ep->ex_lock);
-
+ FC_EXCH_DBG(ep, "exch: ABTS rejected, exchange complete\n");
fc_frame_free(fp);
goto reject;
}
@@ -1784,11 +1800,16 @@ static void fc_seq_ls_acc(struct fc_frame *rx_fp)
struct fc_lport *lport;
struct fc_els_ls_acc *acc;
struct fc_frame *fp;
+ struct fc_seq *sp;
lport = fr_dev(rx_fp);
+ sp = fr_seq(rx_fp);
fp = fc_frame_alloc(lport, sizeof(*acc));
- if (!fp)
+ if (!fp) {
+ FC_EXCH_DBG(fc_seq_exch(sp),
+ "exch: drop LS_ACC, out of memory\n");
return;
+ }
acc = fc_frame_payload_get(fp, sizeof(*acc));
memset(acc, 0, sizeof(*acc));
acc->la_cmd = ELS_LS_ACC;
@@ -1811,11 +1832,16 @@ static void fc_seq_ls_rjt(struct fc_frame *rx_fp, enum fc_els_rjt_reason reason,
struct fc_lport *lport;
struct fc_els_ls_rjt *rjt;
struct fc_frame *fp;
+ struct fc_seq *sp;
lport = fr_dev(rx_fp);
+ sp = fr_seq(rx_fp);
fp = fc_frame_alloc(lport, sizeof(*rjt));
- if (!fp)
+ if (!fp) {
+ FC_EXCH_DBG(fc_seq_exch(sp),
+ "exch: drop LS_ACC, out of memory\n");
return;
+ }
rjt = fc_frame_payload_get(fp, sizeof(*rjt));
memset(rjt, 0, sizeof(*rjt));
rjt->er_cmd = ELS_LS_RJT;
@@ -1975,15 +2001,23 @@ static void fc_exch_els_rec(struct fc_frame *rfp)
ep = fc_exch_lookup(lport,
sid == fc_host_port_id(lport->host) ? oxid : rxid);
explan = ELS_EXPL_OXID_RXID;
- if (!ep)
+ if (!ep) {
+ FC_LPORT_DBG(lport,
+ "REC request from %x: rxid %x oxid %x not found\n",
+ sid, rxid, oxid);
goto reject;
+ }
+ FC_EXCH_DBG(ep, "REC request from %x: rxid %x oxid %x\n",
+ sid, rxid, oxid);
if (ep->oid != sid || oxid != ep->oxid)
goto rel;
if (rxid != FC_XID_UNKNOWN && rxid != ep->rxid)
goto rel;
fp = fc_frame_alloc(lport, sizeof(*acc));
- if (!fp)
+ if (!fp) {
+ FC_EXCH_DBG(ep, "Drop REC request, out of memory\n");
goto out;
+ }
acc = fc_frame_payload_get(fp, sizeof(*acc));
memset(acc, 0, sizeof(*acc));
@@ -2176,6 +2210,7 @@ static void fc_exch_rrq(struct fc_exch *ep)
return;
retry:
+ FC_EXCH_DBG(ep, "exch: RRQ send failed\n");
spin_lock_bh(&ep->ex_lock);
if (ep->state & (FC_EX_RST_CLEANUP | FC_EX_DONE)) {
spin_unlock_bh(&ep->ex_lock);
@@ -2218,6 +2253,8 @@ static void fc_exch_els_rrq(struct fc_frame *fp)
if (!ep)
goto reject;
spin_lock_bh(&ep->ex_lock);
+ FC_EXCH_DBG(ep, "RRQ request from %x: xid %x rxid %x oxid %x\n",
+ sid, xid, ntohs(rp->rrq_rx_id), ntohs(rp->rrq_ox_id));
if (ep->oxid != ntohs(rp->rrq_ox_id))
goto unlock_reject;
if (ep->rxid != ntohs(rp->rrq_rx_id) &&
diff --git a/drivers/scsi/libfc/fc_fcp.c b/drivers/scsi/libfc/fc_fcp.c
index 5121272..5c6c73a 100644
--- a/drivers/scsi/libfc/fc_fcp.c
+++ b/drivers/scsi/libfc/fc_fcp.c
@@ -764,8 +764,11 @@ static void fc_fcp_recv(struct fc_seq *seq, struct fc_frame *fp, void *arg)
fh = fc_frame_header_get(fp);
r_ctl = fh->fh_r_ctl;
- if (lport->state != LPORT_ST_READY)
+ if (lport->state != LPORT_ST_READY) {
+ FC_FCP_DBG(fsp, "lport state %d, ignoring r_ctl %x\n",
+ lport->state, r_ctl);
goto out;
+ }
if (fc_fcp_lock_pkt(fsp))
goto out;
@@ -774,8 +777,10 @@ static void fc_fcp_recv(struct fc_seq *seq, struct fc_frame *fp, void *arg)
goto unlock;
}
- if (fsp->state & (FC_SRB_ABORTED | FC_SRB_ABORT_PENDING))
+ if (fsp->state & (FC_SRB_ABORTED | FC_SRB_ABORT_PENDING)) {
+ FC_FCP_DBG(fsp, "command aborted, ignoring r_ctl %x\n", r_ctl);
goto unlock;
+ }
if (r_ctl == FC_RCTL_DD_DATA_DESC) {
/*
@@ -910,6 +915,10 @@ static void fc_fcp_resp(struct fc_fcp_pkt *fsp, struct fc_frame *fp)
* Wait a at least one jiffy to see if it is delivered.
* If this expires without data, we may do SRR.
*/
+ FC_FCP_DBG(fsp, "tgt %6.6x xfer len %zx data underrun "
+ "len %x, data len %x\n",
+ fsp->rport->port_id,
+ fsp->xfer_len, expected_len, fsp->data_len);
fc_fcp_timer_set(fsp, 2);
return;
}
@@ -959,8 +968,11 @@ static void fc_fcp_complete_locked(struct fc_fcp_pkt *fsp)
if (fsp->cdb_status == SAM_STAT_GOOD &&
fsp->xfer_len < fsp->data_len && !fsp->io_status &&
(!(fsp->scsi_comp_flags & FCP_RESID_UNDER) ||
- fsp->xfer_len < fsp->data_len - fsp->scsi_resid))
+ fsp->xfer_len < fsp->data_len - fsp->scsi_resid)) {
+ FC_FCP_DBG(fsp, "data underrun, xfer %zx data %x\n",
+ fsp->xfer_len, fsp->data_len);
fsp->status_code = FC_DATA_UNDRUN;
+ }
}
seq = fsp->seq_ptr;
@@ -1222,8 +1234,11 @@ static int fc_fcp_pkt_abort(struct fc_fcp_pkt *fsp)
int rc = FAILED;
unsigned long ticks_left;
- if (fc_fcp_send_abort(fsp))
+ FC_FCP_DBG(fsp, "pkt abort state %x\n", fsp->state);
+ if (fc_fcp_send_abort(fsp)) {
+ FC_FCP_DBG(fsp, "failed to send abort\n");
return FAILED;
+ }
init_completion(&fsp->tm_done);
fsp->wait_for_comp = 1;
@@ -1394,6 +1409,8 @@ static void fc_fcp_timeout(unsigned long data)
if (fsp->cdb_cmd.fc_tm_flags)
goto unlock;
+ FC_FCP_DBG(fsp, "fcp timeout, flags %x state %x\n",
+ rpriv->flags, fsp->state);
fsp->state |= FC_SRB_FCP_PROCESSING_TMO;
if (rpriv->flags & FC_RP_FLAGS_REC_SUPPORTED)
@@ -1486,8 +1503,8 @@ static void fc_fcp_rec_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
rjt = fc_frame_payload_get(fp, sizeof(*rjt));
switch (rjt->er_reason) {
default:
- FC_FCP_DBG(fsp, "device %x unexpected REC reject "
- "reason %d expl %d\n",
+ FC_FCP_DBG(fsp,
+ "device %x invalid REC reject %d/%d\n",
fsp->rport->port_id, rjt->er_reason,
rjt->er_explan);
/* fall through */
@@ -1503,6 +1520,9 @@ static void fc_fcp_rec_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
break;
case ELS_RJT_LOGIC:
case ELS_RJT_UNAB:
+ FC_FCP_DBG(fsp, "device %x REC reject %d/%d\n",
+ fsp->rport->port_id, rjt->er_reason,
+ rjt->er_explan);
/*
* If no data transfer, the command frame got dropped
* so we just retry. If data was transferred, we
@@ -1608,6 +1628,8 @@ static void fc_fcp_rec_error(struct fc_fcp_pkt *fsp, struct fc_frame *fp)
switch (error) {
case -FC_EX_CLOSED:
+ FC_FCP_DBG(fsp, "REC %p fid %6.6x exchange closed\n",
+ fsp, fsp->rport->port_id);
fc_fcp_retry_cmd(fsp);
break;
@@ -1622,8 +1644,8 @@ static void fc_fcp_rec_error(struct fc_fcp_pkt *fsp, struct fc_frame *fp)
* Assume REC or LS_ACC was lost.
* The exchange manager will have aborted REC, so retry.
*/
- FC_FCP_DBG(fsp, "REC fid %6.6x error error %d retry %d/%d\n",
- fsp->rport->port_id, error, fsp->recov_retry,
+ FC_FCP_DBG(fsp, "REC %p fid %6.6x exchange timeout retry %d/%d\n",
+ fsp, fsp->rport->port_id, fsp->recov_retry,
FC_MAX_RECOV_RETRY);
if (fsp->recov_retry++ < FC_MAX_RECOV_RETRY)
fc_fcp_rec(fsp);
@@ -1642,6 +1664,7 @@ static void fc_fcp_rec_error(struct fc_fcp_pkt *fsp, struct fc_frame *fp)
*/
static void fc_fcp_recovery(struct fc_fcp_pkt *fsp, u8 code)
{
+ FC_FCP_DBG(fsp, "start recovery code %x\n", code);
fsp->status_code = code;
fsp->cdb_status = 0;
fsp->io_status = 0;
@@ -1768,12 +1791,14 @@ static void fc_fcp_srr_error(struct fc_fcp_pkt *fsp, struct fc_frame *fp)
goto out;
switch (PTR_ERR(fp)) {
case -FC_EX_TIMEOUT:
+ FC_FCP_DBG(fsp, "SRR timeout, retries %d\n", fsp->recov_retry);
if (fsp->recov_retry++ < FC_MAX_RECOV_RETRY)
fc_fcp_rec(fsp);
else
fc_fcp_recovery(fsp, FC_TIMED_OUT);
break;
case -FC_EX_CLOSED: /* e.g., link failure */
+ FC_FCP_DBG(fsp, "SRR error, exchange closed\n");
/* fall through */
default:
fc_fcp_retry_cmd(fsp);
diff --git a/drivers/scsi/libfc/fc_rport.c b/drivers/scsi/libfc/fc_rport.c
index 4b9bb6d..bcd1cd3 100644
--- a/drivers/scsi/libfc/fc_rport.c
+++ b/drivers/scsi/libfc/fc_rport.c
@@ -287,8 +287,10 @@ static void fc_rport_work(struct work_struct *work)
kref_get(&rdata->kref);
mutex_unlock(&rdata->rp_mutex);
- if (!rport)
+ if (!rport) {
+ FC_RPORT_DBG(rdata, "No rport!\n");
rport = fc_remote_port_add(lport->host, 0, &ids);
+ }
if (!rport) {
FC_RPORT_DBG(rdata, "Failed to add the rport\n");
lport->tt.rport_logoff(rdata);
@@ -389,8 +391,10 @@ static void fc_rport_work(struct work_struct *work)
* Re-open for events. Reissue READY event if ready.
*/
rdata->event = RPORT_EV_NONE;
- if (rdata->rp_state == RPORT_ST_READY)
+ if (rdata->rp_state == RPORT_ST_READY) {
+ FC_RPORT_DBG(rdata, "work reopen\n");
fc_rport_enter_ready(rdata);
+ }
mutex_unlock(&rdata->rp_mutex);
}
break;
@@ -568,6 +572,7 @@ static void fc_rport_timeout(struct work_struct *work)
struct fc_lport *lport = rdata->local_port;
mutex_lock(&rdata->rp_mutex);
+ FC_RPORT_DBG(rdata, "Port timeout, state %s\n", fc_rport_state(rdata));
switch (rdata->rp_state) {
case RPORT_ST_FLOGI:
@@ -1095,6 +1100,7 @@ static void fc_rport_prli_resp(struct fc_seq *sp, struct fc_frame *fp,
struct fc_els_spp spp;
} *pp;
struct fc_els_spp temp_spp;
+ struct fc_els_ls_rjt *rjt;
struct fc4_prov *prov;
u32 roles = FC_RPORT_ROLE_UNKNOWN;
u32 fcp_parm = 0;
@@ -1167,8 +1173,10 @@ static void fc_rport_prli_resp(struct fc_seq *sp, struct fc_frame *fp,
fc_rport_enter_rtv(rdata);
} else {
- FC_RPORT_DBG(rdata, "Bad ELS response for PRLI command\n");
- fc_rport_error_retry(rdata, fp);
+ rjt = fc_frame_payload_get(fp, sizeof(*rjt));
+ FC_RPORT_DBG(rdata, "PRLI ELS rejected, reason %x expl %x\n",
+ rjt->er_reason, rjt->er_explan);
+ fc_rport_error_retry(rdata, NULL);
}
out:
@@ -1602,8 +1610,12 @@ static void fc_rport_recv_els_req(struct fc_lport *lport, struct fc_frame *fp)
struct fc_seq_els_data els_data;
rdata = lport->tt.rport_lookup(lport, fc_frame_sid(fp));
- if (!rdata)
+ if (!rdata) {
+ FC_RPORT_ID_DBG(lport, fc_frame_sid(fp),
+ "Received ELS 0x%02x from non-logged-in port\n",
+ fc_frame_payload_op(fp));
goto reject;
+ }
mutex_lock(&rdata->rp_mutex);
@@ -1614,6 +1626,9 @@ static void fc_rport_recv_els_req(struct fc_lport *lport, struct fc_frame *fp)
case RPORT_ST_ADISC:
break;
default:
+ FC_RPORT_DBG(rdata,
+ "Reject ELS 0x%02x while in state %s\n",
+ fc_frame_payload_op(fp), fc_rport_state(rdata));
mutex_unlock(&rdata->rp_mutex);
kref_put(&rdata->kref, lport->tt.rport_destroy);
goto reject;
--
1.8.5.6
--
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