scsi: libfc: additional debugging messages
Signed-off-by: Hannes Reinecke <hare@suse.com>
Acked-by: Johannes Thumshirn <jth@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c
index dd95e2ae..91800cb 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))
@@ -1263,8 +1269,10 @@ 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;
@@ -1317,13 +1325,18 @@ 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);
@@ -1388,14 +1401,17 @@ 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;
}
@@ -1789,11 +1805,16 @@ 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;
@@ -1816,11 +1837,16 @@ 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;
@@ -1980,15 +2006,23 @@ 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));
@@ -2181,6 +2215,7 @@ 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);
@@ -2223,6 +2258,8 @@ 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) &&