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path: root/drivers/scsi/libfc/fc_fcp.c
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Diffstat (limited to 'drivers/scsi/libfc/fc_fcp.c')
-rw-r--r--drivers/scsi/libfc/fc_fcp.c147
1 files changed, 98 insertions, 49 deletions
diff --git a/drivers/scsi/libfc/fc_fcp.c b/drivers/scsi/libfc/fc_fcp.c
index 2924363..cdc06cd 100644
--- a/drivers/scsi/libfc/fc_fcp.c
+++ b/drivers/scsi/libfc/fc_fcp.c
@@ -57,6 +57,9 @@ struct kmem_cache *scsi_pkt_cachep;
#define FC_SRB_READ (1 << 1)
#define FC_SRB_WRITE (1 << 0)
+/* constant added to e_d_tov timeout to get rec_tov value */
+#define REC_TOV_CONST 1
+
/*
* The SCp.ptr should be tested and set under the scsi_pkt_queue lock
*/
@@ -96,7 +99,7 @@ static void fc_fcp_resp(struct fc_fcp_pkt *, struct fc_frame *);
static void fc_fcp_complete_locked(struct fc_fcp_pkt *);
static void fc_tm_done(struct fc_seq *, struct fc_frame *, void *);
static void fc_fcp_error(struct fc_fcp_pkt *, struct fc_frame *);
-static void fc_fcp_recovery(struct fc_fcp_pkt *);
+static void fc_fcp_recovery(struct fc_fcp_pkt *, u8 code);
static void fc_fcp_timeout(unsigned long);
static void fc_fcp_rec(struct fc_fcp_pkt *);
static void fc_fcp_rec_error(struct fc_fcp_pkt *, struct fc_frame *);
@@ -120,14 +123,13 @@ static void fc_fcp_srr_error(struct fc_fcp_pkt *, struct fc_frame *);
#define FC_DATA_UNDRUN 7
#define FC_ERROR 8
#define FC_HRD_ERROR 9
-#define FC_CMD_RECOVERY 10
+#define FC_CRC_ERROR 10
+#define FC_TIMED_OUT 11
/*
* Error recovery timeout values.
*/
-#define FC_SCSI_ER_TIMEOUT (10 * HZ)
#define FC_SCSI_TM_TOV (10 * HZ)
-#define FC_SCSI_REC_TOV (2 * HZ)
#define FC_HOST_RESET_TIMEOUT (30 * HZ)
#define FC_CAN_QUEUE_PERIOD (60 * HZ)
@@ -438,6 +440,7 @@ static void fc_fcp_recv_data(struct fc_fcp_pkt *fsp, struct fc_frame *fp)
void *buf;
struct scatterlist *sg;
u32 nents;
+ u8 host_bcode = FC_COMPLETE;
fh = fc_frame_header_get(fp);
offset = ntohl(fh->fh_parm_offset);
@@ -446,13 +449,16 @@ static void fc_fcp_recv_data(struct fc_fcp_pkt *fsp, struct fc_frame *fp)
buf = fc_frame_payload_get(fp, 0);
/*
- * if this I/O is ddped then clear it
- * and initiate recovery since data
- * frames are expected to be placed
- * directly in that case.
+ * if this I/O is ddped then clear it and initiate recovery since data
+ * frames are expected to be placed directly in that case.
+ *
+ * Indicate error to scsi-ml because something went wrong with the
+ * ddp handling to get us here.
*/
if (fsp->xfer_ddp != FC_XID_UNKNOWN) {
fc_fcp_ddp_done(fsp);
+ FC_FCP_DBG(fsp, "DDP I/O in fc_fcp_recv_data set ERROR\n");
+ host_bcode = FC_ERROR;
goto err;
}
if (offset + len > fsp->data_len) {
@@ -462,6 +468,9 @@ static void fc_fcp_recv_data(struct fc_fcp_pkt *fsp, struct fc_frame *fp)
goto crc_err;
FC_FCP_DBG(fsp, "data received past end. len %zx offset %zx "
"data_len %x\n", len, offset, fsp->data_len);
+
+ /* Data is corrupted indicate scsi-ml should retry */
+ host_bcode = FC_DATA_OVRRUN;
goto err;
}
if (offset != fsp->xfer_len)
@@ -498,8 +507,10 @@ crc_err:
* If so, we need to retry the entire operation.
* Otherwise, ignore it.
*/
- if (fsp->state & FC_SRB_DISCONTIG)
+ if (fsp->state & FC_SRB_DISCONTIG) {
+ host_bcode = FC_CRC_ERROR;
goto err;
+ }
return;
}
}
@@ -517,7 +528,7 @@ crc_err:
fc_fcp_complete_locked(fsp);
return;
err:
- fc_fcp_recovery(fsp);
+ fc_fcp_recovery(fsp, host_bcode);
}
/**
@@ -962,7 +973,13 @@ static void fc_fcp_complete_locked(struct fc_fcp_pkt *fsp)
}
lport->tt.exch_done(seq);
}
- fc_io_compl(fsp);
+ /*
+ * Some resets driven by SCSI are not I/Os and do not have
+ * SCSI commands associated with the requests. We should not
+ * call I/O completion if we do not have a SCSI command.
+ */
+ if (fsp->cmd)
+ fc_io_compl(fsp);
}
/**
@@ -1073,6 +1090,21 @@ static int fc_fcp_pkt_send(struct fc_lport *lport, struct fc_fcp_pkt *fsp)
}
/**
+ * get_fsp_rec_tov() - Helper function to get REC_TOV
+ * @fsp: the FCP packet
+ */
+static inline unsigned int get_fsp_rec_tov(struct fc_fcp_pkt *fsp)
+{
+ struct fc_rport *rport;
+ struct fc_rport_libfc_priv *rpriv;
+
+ rport = fsp->rport;
+ rpriv = rport->dd_data;
+
+ return rpriv->e_d_tov + REC_TOV_CONST;
+}
+
+/**
* fc_fcp_cmd_send() - Send a FCP command
* @lport: The local port to send the command on
* @fsp: The FCP packet the command is on
@@ -1089,6 +1121,7 @@ static int fc_fcp_cmd_send(struct fc_lport *lport, struct fc_fcp_pkt *fsp,
struct fc_rport_libfc_priv *rpriv;
const size_t len = sizeof(fsp->cdb_cmd);
int rc = 0;
+ unsigned int rec_tov;
if (fc_fcp_lock_pkt(fsp))
return 0;
@@ -1119,10 +1152,13 @@ static int fc_fcp_cmd_send(struct fc_lport *lport, struct fc_fcp_pkt *fsp,
fsp->seq_ptr = seq;
fc_fcp_pkt_hold(fsp); /* hold for fc_fcp_pkt_destroy */
+ rec_tov = get_fsp_rec_tov(fsp);
+
setup_timer(&fsp->timer, fc_fcp_timeout, (unsigned long)fsp);
- fc_fcp_timer_set(fsp,
- (fsp->tgt_flags & FC_RP_FLAGS_REC_SUPPORTED) ?
- FC_SCSI_REC_TOV : FC_SCSI_ER_TIMEOUT);
+
+ if (rpriv->flags & FC_RP_FLAGS_REC_SUPPORTED)
+ fc_fcp_timer_set(fsp, rec_tov);
+
unlock:
fc_fcp_unlock_pkt(fsp);
return rc;
@@ -1197,13 +1233,16 @@ static void fc_lun_reset_send(unsigned long data)
{
struct fc_fcp_pkt *fsp = (struct fc_fcp_pkt *)data;
struct fc_lport *lport = fsp->lp;
+ unsigned int rec_tov;
+
if (lport->tt.fcp_cmd_send(lport, fsp, fc_tm_done)) {
if (fsp->recov_retry++ >= FC_MAX_RECOV_RETRY)
return;
if (fc_fcp_lock_pkt(fsp))
return;
+ rec_tov = get_fsp_rec_tov(fsp);
setup_timer(&fsp->timer, fc_lun_reset_send, (unsigned long)fsp);
- fc_fcp_timer_set(fsp, FC_SCSI_REC_TOV);
+ fc_fcp_timer_set(fsp, rec_tov);
fc_fcp_unlock_pkt(fsp);
}
}
@@ -1282,27 +1321,27 @@ static void fc_tm_done(struct fc_seq *seq, struct fc_frame *fp, void *arg)
*
* scsi-eh will escalate for when either happens.
*/
- return;
+ goto out;
}
if (fc_fcp_lock_pkt(fsp))
- return;
+ goto out;
/*
* raced with eh timeout handler.
*/
- if (!fsp->seq_ptr || !fsp->wait_for_comp) {
- spin_unlock_bh(&fsp->scsi_pkt_lock);
- return;
- }
+ if (!fsp->seq_ptr || !fsp->wait_for_comp)
+ goto out_unlock;
fh = fc_frame_header_get(fp);
if (fh->fh_type != FC_TYPE_BLS)
fc_fcp_resp(fsp, fp);
fsp->seq_ptr = NULL;
fsp->lp->tt.exch_done(seq);
- fc_frame_free(fp);
+out_unlock:
fc_fcp_unlock_pkt(fsp);
+out:
+ fc_frame_free(fp);
}
/**
@@ -1341,13 +1380,10 @@ static void fc_fcp_timeout(unsigned long data)
if (rpriv->flags & FC_RP_FLAGS_REC_SUPPORTED)
fc_fcp_rec(fsp);
- else if (time_after_eq(fsp->last_pkt_time + (FC_SCSI_ER_TIMEOUT / 2),
- jiffies))
- fc_fcp_timer_set(fsp, FC_SCSI_ER_TIMEOUT);
else if (fsp->state & FC_SRB_RCV_STATUS)
fc_fcp_complete_locked(fsp);
else
- fc_fcp_recovery(fsp);
+ fc_fcp_recovery(fsp, FC_TIMED_OUT);
fsp->state &= ~FC_SRB_FCP_PROCESSING_TMO;
unlock:
fc_fcp_unlock_pkt(fsp);
@@ -1373,6 +1409,7 @@ static void fc_fcp_rec(struct fc_fcp_pkt *fsp)
fc_fcp_complete_locked(fsp);
return;
}
+
fp = fc_fcp_frame_alloc(lport, sizeof(struct fc_els_rec));
if (!fp)
goto retry;
@@ -1383,15 +1420,15 @@ static void fc_fcp_rec(struct fc_fcp_pkt *fsp)
FC_FCTL_REQ, 0);
if (lport->tt.elsct_send(lport, rport->port_id, fp, ELS_REC,
fc_fcp_rec_resp, fsp,
- jiffies_to_msecs(FC_SCSI_REC_TOV))) {
+ 2 * lport->r_a_tov)) {
fc_fcp_pkt_hold(fsp); /* hold while REC outstanding */
return;
}
retry:
if (fsp->recov_retry++ < FC_MAX_RECOV_RETRY)
- fc_fcp_timer_set(fsp, FC_SCSI_REC_TOV);
+ fc_fcp_timer_set(fsp, get_fsp_rec_tov(fsp));
else
- fc_fcp_recovery(fsp);
+ fc_fcp_recovery(fsp, FC_TIMED_OUT);
}
/**
@@ -1445,7 +1482,6 @@ static void fc_fcp_rec_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
* making progress.
*/
rpriv->flags &= ~FC_RP_FLAGS_REC_SUPPORTED;
- fc_fcp_timer_set(fsp, FC_SCSI_ER_TIMEOUT);
break;
case ELS_RJT_LOGIC:
case ELS_RJT_UNAB:
@@ -1460,7 +1496,7 @@ static void fc_fcp_rec_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
fc_fcp_retry_cmd(fsp);
break;
}
- fc_fcp_recovery(fsp);
+ fc_fcp_recovery(fsp, FC_ERROR);
break;
}
} else if (opcode == ELS_LS_ACC) {
@@ -1498,12 +1534,12 @@ static void fc_fcp_rec_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
}
fc_fcp_srr(fsp, r_ctl, offset);
} else if (e_stat & ESB_ST_SEQ_INIT) {
-
+ unsigned int rec_tov = get_fsp_rec_tov(fsp);
/*
* The remote port has the initiative, so just
* keep waiting for it to complete.
*/
- fc_fcp_timer_set(fsp, FC_SCSI_REC_TOV);
+ fc_fcp_timer_set(fsp, rec_tov);
} else {
/*
@@ -1575,7 +1611,7 @@ static void fc_fcp_rec_error(struct fc_fcp_pkt *fsp, struct fc_frame *fp)
if (fsp->recov_retry++ < FC_MAX_RECOV_RETRY)
fc_fcp_rec(fsp);
else
- fc_fcp_recovery(fsp);
+ fc_fcp_recovery(fsp, FC_ERROR);
break;
}
fc_fcp_unlock_pkt(fsp);
@@ -1587,9 +1623,9 @@ out:
* fc_fcp_recovery() - Handler for fcp_pkt recovery
* @fsp: The FCP pkt that needs to be aborted
*/
-static void fc_fcp_recovery(struct fc_fcp_pkt *fsp)
+static void fc_fcp_recovery(struct fc_fcp_pkt *fsp, u8 code)
{
- fsp->status_code = FC_CMD_RECOVERY;
+ fsp->status_code = code;
fsp->cdb_status = 0;
fsp->io_status = 0;
/*
@@ -1616,6 +1652,7 @@ static void fc_fcp_srr(struct fc_fcp_pkt *fsp, enum fc_rctl r_ctl, u32 offset)
struct fcp_srr *srr;
struct fc_frame *fp;
u8 cdb_op;
+ unsigned int rec_tov;
rport = fsp->rport;
rpriv = rport->dd_data;
@@ -1640,8 +1677,9 @@ static void fc_fcp_srr(struct fc_fcp_pkt *fsp, enum fc_rctl r_ctl, u32 offset)
rpriv->local_port->port_id, FC_TYPE_FCP,
FC_FCTL_REQ, 0);
+ rec_tov = get_fsp_rec_tov(fsp);
seq = lport->tt.exch_seq_send(lport, fp, fc_fcp_srr_resp, NULL,
- fsp, jiffies_to_msecs(FC_SCSI_REC_TOV));
+ fsp, jiffies_to_msecs(rec_tov));
if (!seq)
goto retry;
@@ -1665,6 +1703,7 @@ static void fc_fcp_srr_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
{
struct fc_fcp_pkt *fsp = arg;
struct fc_frame_header *fh;
+ unsigned int rec_tov;
if (IS_ERR(fp)) {
fc_fcp_srr_error(fsp, fp);
@@ -1691,11 +1730,12 @@ static void fc_fcp_srr_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
switch (fc_frame_payload_op(fp)) {
case ELS_LS_ACC:
fsp->recov_retry = 0;
- fc_fcp_timer_set(fsp, FC_SCSI_REC_TOV);
+ rec_tov = get_fsp_rec_tov(fsp);
+ fc_fcp_timer_set(fsp, rec_tov);
break;
case ELS_LS_RJT:
default:
- fc_fcp_recovery(fsp);
+ fc_fcp_recovery(fsp, FC_ERROR);
break;
}
fc_fcp_unlock_pkt(fsp);
@@ -1721,7 +1761,7 @@ static void fc_fcp_srr_error(struct fc_fcp_pkt *fsp, struct fc_frame *fp)
if (fsp->recov_retry++ < FC_MAX_RECOV_RETRY)
fc_fcp_rec(fsp);
else
- fc_fcp_recovery(fsp);
+ fc_fcp_recovery(fsp, FC_TIMED_OUT);
break;
case -FC_EX_CLOSED: /* e.g., link failure */
/* fall through */
@@ -1820,19 +1860,17 @@ static int fc_queuecommand_lck(struct scsi_cmnd *sc_cmd, void (*done)(struct scs
if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE) {
fsp->req_flags = FC_SRB_READ;
stats->InputRequests++;
- stats->InputMegabytes = fsp->data_len;
+ stats->InputBytes += fsp->data_len;
} else if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) {
fsp->req_flags = FC_SRB_WRITE;
stats->OutputRequests++;
- stats->OutputMegabytes = fsp->data_len;
+ stats->OutputBytes += fsp->data_len;
} else {
fsp->req_flags = 0;
stats->ControlRequests++;
}
put_cpu();
- fsp->tgt_flags = rpriv->flags;
-
init_timer(&fsp->timer);
fsp->timer.data = (unsigned long)fsp;
@@ -1946,18 +1984,29 @@ static void fc_io_compl(struct fc_fcp_pkt *fsp)
break;
case FC_CMD_ABORTED:
FC_FCP_DBG(fsp, "Returning DID_ERROR to scsi-ml "
- "due to FC_CMD_ABORTED\n");
+ "due to FC_CMD_ABORTED\n");
sc_cmd->result = (DID_ERROR << 16) | fsp->io_status;
break;
- case FC_CMD_RECOVERY:
- sc_cmd->result = (DID_BUS_BUSY << 16) | fsp->io_status;
- break;
case FC_CMD_RESET:
+ FC_FCP_DBG(fsp, "Returning DID_RESET to scsi-ml "
+ "due to FC_CMD_RESET\n");
sc_cmd->result = (DID_RESET << 16);
break;
case FC_HRD_ERROR:
+ FC_FCP_DBG(fsp, "Returning DID_NO_CONNECT to scsi-ml "
+ "due to FC_HRD_ERROR\n");
sc_cmd->result = (DID_NO_CONNECT << 16);
break;
+ case FC_CRC_ERROR:
+ FC_FCP_DBG(fsp, "Returning DID_PARITY to scsi-ml "
+ "due to FC_CRC_ERROR\n");
+ sc_cmd->result = (DID_PARITY << 16);
+ break;
+ case FC_TIMED_OUT:
+ FC_FCP_DBG(fsp, "Returning DID_BUS_BUSY to scsi-ml "
+ "due to FC_TIMED_OUT\n");
+ sc_cmd->result = (DID_BUS_BUSY << 16) | fsp->io_status;
+ break;
default:
FC_FCP_DBG(fsp, "Returning DID_ERROR to scsi-ml "
"due to unknown error\n");
@@ -2004,7 +2053,7 @@ int fc_eh_abort(struct scsi_cmnd *sc_cmd)
fsp = CMD_SP(sc_cmd);
if (!fsp) {
/* command completed while scsi eh was setting up */
- spin_unlock_irqrestore(lport->host->host_lock, flags);
+ spin_unlock_irqrestore(&si->scsi_queue_lock, flags);
return SUCCESS;
}
/* grab a ref so the fsp and sc_cmd cannot be relased from under us */
generated by cgit v0.10.2 at 2024-08-31 18:22:30 (GMT)