Merge branch 'nvme-4.13' of git://git.infradead.org/nvme into for-linus

Pull NVMe fixes from Christoph

6 files changed, 145 insertions, 110 deletions

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 3b77cfe5aa1e..c49f1f8b2e57 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -1995,6 +1995,9 @@ static ssize_t wwid_show(struct device *dev, struct device_attribute *attr,
 	int serial_len = sizeof(ctrl->serial);
 	int model_len = sizeof(ctrl->model);
 
+	if (!uuid_is_null(&ns->uuid))
+		return sprintf(buf, "uuid.%pU\n", &ns->uuid);
+
 	if (memchr_inv(ns->nguid, 0, sizeof(ns->nguid)))
 		return sprintf(buf, "eui.%16phN\n", ns->nguid);
 
@@ -2709,7 +2712,8 @@ void nvme_kill_queues(struct nvme_ctrl *ctrl)
 	mutex_lock(&ctrl->namespaces_mutex);
 
 	/* Forcibly unquiesce queues to avoid blocking dispatch */
-	blk_mq_unquiesce_queue(ctrl->admin_q);
+	if (ctrl->admin_q)
+		blk_mq_unquiesce_queue(ctrl->admin_q);
 
 	list_for_each_entry(ns, &ctrl->namespaces, list) {
 		/*
diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c
index d666ada39a9b..5c2a08ef08ba 100644
--- a/drivers/nvme/host/fc.c
+++ b/drivers/nvme/host/fc.c
@@ -1888,7 +1888,7 @@ nvme_fc_start_fcp_op(struct nvme_fc_ctrl *ctrl, struct nvme_fc_queue *queue,
 	 * the target device is present
 	 */
 	if (ctrl->rport->remoteport.port_state != FC_OBJSTATE_ONLINE)
-		return BLK_STS_IOERR;
+		goto busy;
 
 	if (!nvme_fc_ctrl_get(ctrl))
 		return BLK_STS_IOERR;
@@ -1958,22 +1958,25 @@ nvme_fc_start_fcp_op(struct nvme_fc_ctrl *ctrl, struct nvme_fc_queue *queue,
 					queue->lldd_handle, &op->fcp_req);
 
 	if (ret) {
-		if (op->rq)			/* normal request */
+		if (!(op->flags & FCOP_FLAGS_AEN))
 			nvme_fc_unmap_data(ctrl, op->rq, op);
-		/* else - aen. no cleanup needed */
 
 		nvme_fc_ctrl_put(ctrl);
 
-		if (ret != -EBUSY)
+		if (ctrl->rport->remoteport.port_state == FC_OBJSTATE_ONLINE &&
+				ret != -EBUSY)
 			return BLK_STS_IOERR;
 
-		if (op->rq)
-			blk_mq_delay_run_hw_queue(queue->hctx, NVMEFC_QUEUE_DELAY);
-
-		return BLK_STS_RESOURCE;
+		goto busy;
 	}
 
 	return BLK_STS_OK;
+
+busy:
+	if (!(op->flags & FCOP_FLAGS_AEN) && queue->hctx)
+		blk_mq_delay_run_hw_queue(queue->hctx, NVMEFC_QUEUE_DELAY);
+
+	return BLK_STS_RESOURCE;
 }
 
 static blk_status_t
@@ -2802,66 +2805,70 @@ out_fail:
 	return ERR_PTR(ret);
 }
 
-enum {
-	FCT_TRADDR_ERR		= 0,
-	FCT_TRADDR_WWNN		= 1 << 0,
-	FCT_TRADDR_WWPN		= 1 << 1,
-};
 
 struct nvmet_fc_traddr {
 	u64	nn;
 	u64	pn;
 };
 
-static const match_table_t traddr_opt_tokens = {
-	{ FCT_TRADDR_WWNN,	"nn-%s"		},
-	{ FCT_TRADDR_WWPN,	"pn-%s"		},
-	{ FCT_TRADDR_ERR,	NULL		}
-};
-
 static int
-nvme_fc_parse_address(struct nvmet_fc_traddr *traddr, char *buf)
+__nvme_fc_parse_u64(substring_t *sstr, u64 *val)
 {
-	substring_t args[MAX_OPT_ARGS];
-	char *options, *o, *p;
-	int token, ret = 0;
 	u64 token64;
 
-	options = o = kstrdup(buf, GFP_KERNEL);
-	if (!options)
-		return -ENOMEM;
+	if (match_u64(sstr, &token64))
+		return -EINVAL;
+	*val = token64;
 
-	while ((p = strsep(&o, ":\n")) != NULL) {
-		if (!*p)
-			continue;
+	return 0;
+}
 
-		token = match_token(p, traddr_opt_tokens, args);
-		switch (token) {
-		case FCT_TRADDR_WWNN:
-			if (match_u64(args, &token64)) {
-				ret = -EINVAL;
-				goto out;
-			}
-			traddr->nn = token64;
-			break;
-		case FCT_TRADDR_WWPN:
-			if (match_u64(args, &token64)) {
-				ret = -EINVAL;
-				goto out;
-			}
-			traddr->pn = token64;
-			break;
-		default:
-			pr_warn("unknown traddr token or missing value '%s'\n",
-					p);
-			ret = -EINVAL;
-			goto out;
-		}
-	}
+/*
+ * This routine validates and extracts the WWN's from the TRADDR string.
+ * As kernel parsers need the 0x to determine number base, universally
+ * build string to parse with 0x prefix before parsing name strings.
+ */
+static int
+nvme_fc_parse_traddr(struct nvmet_fc_traddr *traddr, char *buf, size_t blen)
+{
+	char name[2 + NVME_FC_TRADDR_HEXNAMELEN + 1];
+	substring_t wwn = { name, &name[sizeof(name)-1] };
+	int nnoffset, pnoffset;
+
+	/* validate it string one of the 2 allowed formats */
+	if (strnlen(buf, blen) == NVME_FC_TRADDR_MAXLENGTH &&
+			!strncmp(buf, "nn-0x", NVME_FC_TRADDR_OXNNLEN) &&
+			!strncmp(&buf[NVME_FC_TRADDR_MAX_PN_OFFSET],
+				"pn-0x", NVME_FC_TRADDR_OXNNLEN)) {
+		nnoffset = NVME_FC_TRADDR_OXNNLEN;
+		pnoffset = NVME_FC_TRADDR_MAX_PN_OFFSET +
+						NVME_FC_TRADDR_OXNNLEN;
+	} else if ((strnlen(buf, blen) == NVME_FC_TRADDR_MINLENGTH &&
+			!strncmp(buf, "nn-", NVME_FC_TRADDR_NNLEN) &&
+			!strncmp(&buf[NVME_FC_TRADDR_MIN_PN_OFFSET],
+				"pn-", NVME_FC_TRADDR_NNLEN))) {
+		nnoffset = NVME_FC_TRADDR_NNLEN;
+		pnoffset = NVME_FC_TRADDR_MIN_PN_OFFSET + NVME_FC_TRADDR_NNLEN;
+	} else
+		goto out_einval;
 
-out:
-	kfree(options);
-	return ret;
+	name[0] = '0';
+	name[1] = 'x';
+	name[2 + NVME_FC_TRADDR_HEXNAMELEN] = 0;
+
+	memcpy(&name[2], &buf[nnoffset], NVME_FC_TRADDR_HEXNAMELEN);
+	if (__nvme_fc_parse_u64(&wwn, &traddr->nn))
+		goto out_einval;
+
+	memcpy(&name[2], &buf[pnoffset], NVME_FC_TRADDR_HEXNAMELEN);
+	if (__nvme_fc_parse_u64(&wwn, &traddr->pn))
+		goto out_einval;
+
+	return 0;
+
+out_einval:
+	pr_warn("%s: bad traddr string\n", __func__);
+	return -EINVAL;
 }
 
 static struct nvme_ctrl *
@@ -2875,11 +2882,11 @@ nvme_fc_create_ctrl(struct device *dev, struct nvmf_ctrl_options *opts)
 	unsigned long flags;
 	int ret;
 
-	ret = nvme_fc_parse_address(&raddr, opts->traddr);
+	ret = nvme_fc_parse_traddr(&raddr, opts->traddr, NVMF_TRADDR_SIZE);
 	if (ret || !raddr.nn || !raddr.pn)
 		return ERR_PTR(-EINVAL);
 
-	ret = nvme_fc_parse_address(&laddr, opts->host_traddr);
+	ret = nvme_fc_parse_traddr(&laddr, opts->host_traddr, NVMF_TRADDR_SIZE);
 	if (ret || !laddr.nn || !laddr.pn)
 		return ERR_PTR(-EINVAL);
 
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 8569ee771269..cd888a47d0fc 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -1619,7 +1619,7 @@ static void nvme_free_host_mem(struct nvme_dev *dev)
 static int nvme_alloc_host_mem(struct nvme_dev *dev, u64 min, u64 preferred)
 {
 	struct nvme_host_mem_buf_desc *descs;
-	u32 chunk_size, max_entries;
+	u32 chunk_size, max_entries, len;
 	int i = 0;
 	void **bufs;
 	u64 size = 0, tmp;
@@ -1638,10 +1638,10 @@ retry:
 	if (!bufs)
 		goto out_free_descs;
 
-	for (size = 0; size < preferred; size += chunk_size) {
-		u32 len = min_t(u64, chunk_size, preferred - size);
+	for (size = 0; size < preferred; size += len) {
 		dma_addr_t dma_addr;
 
+		len = min_t(u64, chunk_size, preferred - size);
 		bufs[i] = dma_alloc_attrs(dev->dev, len, &dma_addr, GFP_KERNEL,
 				DMA_ATTR_NO_KERNEL_MAPPING | DMA_ATTR_NO_WARN);
 		if (!bufs[i])
diff --git a/drivers/nvme/target/fc.c b/drivers/nvme/target/fc.c
index d5801c150b1c..31ca55dfcb1d 100644
--- a/drivers/nvme/target/fc.c
+++ b/drivers/nvme/target/fc.c
@@ -2293,66 +2293,70 @@ nvmet_fc_rcv_fcp_abort(struct nvmet_fc_target_port *target_port,
 }
 EXPORT_SYMBOL_GPL(nvmet_fc_rcv_fcp_abort);
 
-enum {
-	FCT_TRADDR_ERR		= 0,
-	FCT_TRADDR_WWNN		= 1 << 0,
-	FCT_TRADDR_WWPN		= 1 << 1,
-};
 
 struct nvmet_fc_traddr {
 	u64	nn;
 	u64	pn;
 };
 
-static const match_table_t traddr_opt_tokens = {
-	{ FCT_TRADDR_WWNN,	"nn-%s"		},
-	{ FCT_TRADDR_WWPN,	"pn-%s"		},
-	{ FCT_TRADDR_ERR,	NULL		}
-};
-
 static int
-nvmet_fc_parse_traddr(struct nvmet_fc_traddr *traddr, char *buf)
+__nvme_fc_parse_u64(substring_t *sstr, u64 *val)
 {
-	substring_t args[MAX_OPT_ARGS];
-	char *options, *o, *p;
-	int token, ret = 0;
 	u64 token64;
 
-	options = o = kstrdup(buf, GFP_KERNEL);
-	if (!options)
-		return -ENOMEM;
+	if (match_u64(sstr, &token64))
+		return -EINVAL;
+	*val = token64;
 
-	while ((p = strsep(&o, ":\n")) != NULL) {
-		if (!*p)
-			continue;
+	return 0;
+}
 
-		token = match_token(p, traddr_opt_tokens, args);
-		switch (token) {
-		case FCT_TRADDR_WWNN:
-			if (match_u64(args, &token64)) {
-				ret = -EINVAL;
-				goto out;
-			}
-			traddr->nn = token64;
-			break;
-		case FCT_TRADDR_WWPN:
-			if (match_u64(args, &token64)) {
-				ret = -EINVAL;
-				goto out;
-			}
-			traddr->pn = token64;
-			break;
-		default:
-			pr_warn("unknown traddr token or missing value '%s'\n",
-					p);
-			ret = -EINVAL;
-			goto out;
-		}
-	}
+/*
+ * This routine validates and extracts the WWN's from the TRADDR string.
+ * As kernel parsers need the 0x to determine number base, universally
+ * build string to parse with 0x prefix before parsing name strings.
+ */
+static int
+nvme_fc_parse_traddr(struct nvmet_fc_traddr *traddr, char *buf, size_t blen)
+{
+	char name[2 + NVME_FC_TRADDR_HEXNAMELEN + 1];
+	substring_t wwn = { name, &name[sizeof(name)-1] };
+	int nnoffset, pnoffset;
+
+	/* validate it string one of the 2 allowed formats */
+	if (strnlen(buf, blen) == NVME_FC_TRADDR_MAXLENGTH &&
+			!strncmp(buf, "nn-0x", NVME_FC_TRADDR_OXNNLEN) &&
+			!strncmp(&buf[NVME_FC_TRADDR_MAX_PN_OFFSET],
+				"pn-0x", NVME_FC_TRADDR_OXNNLEN)) {
+		nnoffset = NVME_FC_TRADDR_OXNNLEN;
+		pnoffset = NVME_FC_TRADDR_MAX_PN_OFFSET +
+						NVME_FC_TRADDR_OXNNLEN;
+	} else if ((strnlen(buf, blen) == NVME_FC_TRADDR_MINLENGTH &&
+			!strncmp(buf, "nn-", NVME_FC_TRADDR_NNLEN) &&
+			!strncmp(&buf[NVME_FC_TRADDR_MIN_PN_OFFSET],
+				"pn-", NVME_FC_TRADDR_NNLEN))) {
+		nnoffset = NVME_FC_TRADDR_NNLEN;
+		pnoffset = NVME_FC_TRADDR_MIN_PN_OFFSET + NVME_FC_TRADDR_NNLEN;
+	} else
+		goto out_einval;
+
+	name[0] = '0';
+	name[1] = 'x';
+	name[2 + NVME_FC_TRADDR_HEXNAMELEN] = 0;
+
+	memcpy(&name[2], &buf[nnoffset], NVME_FC_TRADDR_HEXNAMELEN);
+	if (__nvme_fc_parse_u64(&wwn, &traddr->nn))
+		goto out_einval;
+
+	memcpy(&name[2], &buf[pnoffset], NVME_FC_TRADDR_HEXNAMELEN);
+	if (__nvme_fc_parse_u64(&wwn, &traddr->pn))
+		goto out_einval;
 
-out:
-	kfree(options);
-	return ret;
+	return 0;
+
+out_einval:
+	pr_warn("%s: bad traddr string\n", __func__);
+	return -EINVAL;
 }
 
 static int
@@ -2370,7 +2374,8 @@ nvmet_fc_add_port(struct nvmet_port *port)
 
 	/* map the traddr address info to a target port */
 
-	ret = nvmet_fc_parse_traddr(&traddr, port->disc_addr.traddr);
+	ret = nvme_fc_parse_traddr(&traddr, port->disc_addr.traddr,
+			sizeof(port->disc_addr.traddr));
 	if (ret)
 		return ret;
 
diff --git a/include/linux/nvme-fc.h b/include/linux/nvme-fc.h
index 21c37e39e41a..36cca93a5ff2 100644
--- a/include/linux/nvme-fc.h
+++ b/include/linux/nvme-fc.h
@@ -334,5 +334,24 @@ struct fcnvme_ls_disconnect_acc {
 #define NVME_FC_LS_TIMEOUT_SEC		2		/* 2 seconds */
 #define NVME_FC_TGTOP_TIMEOUT_SEC	2		/* 2 seconds */
 
+/*
+ * TRADDR string must be of form "nn-<16hexdigits>:pn-<16hexdigits>"
+ * the string is allowed to be specified with or without a "0x" prefix
+ * infront of the <16hexdigits>.  Without is considered the "min" string
+ * and with is considered the "max" string. The hexdigits may be upper
+ * or lower case.
+ */
+#define NVME_FC_TRADDR_NNLEN		3	/* "?n-" */
+#define NVME_FC_TRADDR_OXNNLEN		5	/* "?n-0x" */
+#define NVME_FC_TRADDR_HEXNAMELEN	16
+#define NVME_FC_TRADDR_MINLENGTH	\
+		(2 * (NVME_FC_TRADDR_NNLEN + NVME_FC_TRADDR_HEXNAMELEN) + 1)
+#define NVME_FC_TRADDR_MAXLENGTH	\
+		(2 * (NVME_FC_TRADDR_OXNNLEN + NVME_FC_TRADDR_HEXNAMELEN) + 1)
+#define NVME_FC_TRADDR_MIN_PN_OFFSET	\
+		(NVME_FC_TRADDR_NNLEN + NVME_FC_TRADDR_HEXNAMELEN + 1)
+#define NVME_FC_TRADDR_MAX_PN_OFFSET	\
+		(NVME_FC_TRADDR_OXNNLEN + NVME_FC_TRADDR_HEXNAMELEN + 1)
+
 
 #endif /* _NVME_FC_H */
diff --git a/include/linux/nvme.h b/include/linux/nvme.h
index bc74da018bdc..25d8225dbd04 100644
--- a/include/linux/nvme.h
+++ b/include/linux/nvme.h
@@ -1006,7 +1006,7 @@ static inline bool nvme_is_write(struct nvme_command *cmd)
 	 * Why can't we simply have a Fabrics In and Fabrics out command?
 	 */
 	if (unlikely(cmd->common.opcode == nvme_fabrics_command))
-		return cmd->fabrics.opcode & 1;
+		return cmd->fabrics.fctype & 1;
 	return cmd->common.opcode & 1;
 }