Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

Pull networking fixes from David Miller:

 1) Fix error path in netdevsim, from Jakub Kicinski.

 2) Default values listed in tcp_wmem and tcp_rmem documentation were
    inaccurate, from Tonghao Zhang.

 3) Fix route leaks in SCTP, both for ipv4 and ipv6. From Alexey Kodanev
    and Tommi Rantala.

 4) Fix "MASK < Y" meant to be "MASK << Y" in xgbe driver, from Wolfram
    Sang.

 5) Use after free in u32_destroy_key(), from Paolo Abeni.

 6) Fix two TX issues in be2net driver, from Suredh Reddy.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (25 commits)
  be2net: Handle transmit completion errors in Lancer
  be2net: Fix HW stall issue in Lancer
  RDS: IB: Fix null pointer issue
  nfp: fix kdoc warnings on nested structures
  sample/bpf: fix erspan metadata
  net: erspan: fix erspan config overwrite
  net: erspan: fix metadata extraction
  cls_u32: fix use after free in u32_destroy_key()
  net: amd-xgbe: fix comparison to bitshift when dealing with a mask
  net: phy: Handle not having GPIO enabled in the kernel
  ibmvnic: fix empty firmware version and errors cleanup
  sctp: fix dst refcnt leak in sctp_v4_get_dst
  sctp: fix dst refcnt leak in sctp_v6_get_dst()
  dwc-xlgmac: remove Jie Deng as co-maintainer
  doc: Change the min default value of tcp_wmem/tcp_rmem.
  samples/bpf: use bpf_set_link_xdp_fd
  libbpf: add missing SPDX-License-Identifier
  libbpf: add error reporting in XDP
  libbpf: add function to setup XDP
  tools: add netlink.h and if_link.h in tools uapi
  ...

Documentation/bpf/bpf_devel_QA.txt

@@ -516,4 +516,35 @@ A: LLVM has a -mcpu selector for the BPF back end in order to allow the
    By the way, the BPF kernel selftests run with -mcpu=probe for better
    test coverage.
 
+Q: In some cases clang flag "-target bpf" is used but in other cases the
+   default clang target, which matches the underlying architecture, is used.
+   What is the difference and when I should use which?
+
+A: Although LLVM IR generation and optimization try to stay architecture
+   independent, "-target <arch>" still has some impact on generated code:
+
+     - BPF program may recursively include header file(s) with file scope
+       inline assembly codes. The default target can handle this well,
+       while bpf target may fail if bpf backend assembler does not
+       understand these assembly codes, which is true in most cases.
+
+     - When compiled without -g, additional elf sections, e.g.,
+       .eh_frame and .rela.eh_frame, may be present in the object file
+       with default target, but not with bpf target.
+
+     - The default target may turn a C switch statement into a switch table
+       lookup and jump operation. Since the switch table is placed
+       in the global readonly section, the bpf program will fail to load.
+       The bpf target does not support switch table optimization.
+       The clang option "-fno-jump-tables" can be used to disable
+       switch table generation.
+
+   You should use default target when:
+
+     - Your program includes a header file, e.g., ptrace.h, which eventually
+       pulls in some header files containing file scope host assembly codes.
+     - You can add "-fno-jump-tables" to work around the switch table issue.
+
+   Otherwise, you can use bpf target.
+
 Happy BPF hacking!

Documentation/networking/ip-sysctl.txt

@@ -508,7 +508,7 @@ tcp_rmem - vector of 3 INTEGERs: min, default, max
 	min: Minimal size of receive buffer used by TCP sockets.
 	It is guaranteed to each TCP socket, even under moderate memory
 	pressure.
-	Default: 1 page
+	Default: 4K
 
 	default: initial size of receive buffer used by TCP sockets.
 	This value overrides net.core.rmem_default used by other protocols.
@@ -667,7 +667,7 @@ tcp_window_scaling - BOOLEAN
 tcp_wmem - vector of 3 INTEGERs: min, default, max
 	min: Amount of memory reserved for send buffers for TCP sockets.
 	Each TCP socket has rights to use it due to fact of its birth.
-	Default: 1 page
+	Default: 4K
 
 	default: initial size of send buffer used by TCP sockets.  This
 	value overrides net.core.wmem_default used by other protocols.

MAINTAINERS

@@ -13326,7 +13326,6 @@ F:	include/linux/platform_data/dma-dw.h
 F:	drivers/dma/dw/
 
 SYNOPSYS DESIGNWARE ENTERPRISE ETHERNET DRIVER
-M:	Jie Deng <jiedeng@synopsys.com>
 M:	Jose Abreu <Jose.Abreu@synopsys.com>
 L:	netdev@vger.kernel.org
 S:	Supported

drivers/net/ethernet/amd/xgbe/xgbe-drv.c

@@ -595,7 +595,7 @@ static void xgbe_isr_task(unsigned long data)
 
 		reissue_mask = 1 << 0;
 		if (!pdata->per_channel_irq)
-			reissue_mask |= 0xffff < 4;
+			reissue_mask |= 0xffff << 4;
 
 		XP_IOWRITE(pdata, XP_INT_REISSUE_EN, reissue_mask);
 	}

drivers/net/ethernet/emulex/benet/be.h

@@ -248,6 +248,7 @@ struct be_tx_stats {
 	u32 tx_spoof_check_err;
 	u32 tx_qinq_err;
 	u32 tx_internal_parity_err;
+	u32 tx_sge_err;
 	struct u64_stats_sync sync;
 	struct u64_stats_sync sync_compl;
 };
@@ -944,8 +945,10 @@ static inline bool is_ipv6_ext_hdr(struct sk_buff *skb)
 #define BE_ERROR_EEH		1
 #define BE_ERROR_UE		BIT(1)
 #define BE_ERROR_FW		BIT(2)
-#define BE_ERROR_HW		(BE_ERROR_EEH | BE_ERROR_UE)
-#define BE_ERROR_ANY		(BE_ERROR_EEH | BE_ERROR_UE | BE_ERROR_FW)
+#define BE_ERROR_TX		BIT(3)
+#define BE_ERROR_HW		(BE_ERROR_EEH | BE_ERROR_UE | BE_ERROR_TX)
+#define BE_ERROR_ANY		(BE_ERROR_EEH | BE_ERROR_UE | BE_ERROR_FW | \
+				 BE_ERROR_TX)
 #define BE_CLEAR_ALL		0xFF
 
 static inline u8 be_check_error(struct be_adapter *adapter, u32 err_type)

drivers/net/ethernet/emulex/benet/be_ethtool.c

@@ -189,6 +189,7 @@ static const struct be_ethtool_stat et_tx_stats[] = {
 	 * packet data. This counter is applicable only for Lancer adapters.
 	 */
 	{DRVSTAT_TX_INFO(tx_internal_parity_err)},
+	{DRVSTAT_TX_INFO(tx_sge_err)},
 	{DRVSTAT_TX_INFO(tx_bytes)},
 	{DRVSTAT_TX_INFO(tx_pkts)},
 	{DRVSTAT_TX_INFO(tx_vxlan_offload_pkts)},

drivers/net/ethernet/emulex/benet/be_hw.h

@@ -261,6 +261,7 @@ struct be_eth_hdr_wrb {
 #define LANCER_TX_COMP_HSW_DROP_MAC_ERR		0x3
 #define LANCER_TX_COMP_HSW_DROP_VLAN_ERR	0x5
 #define LANCER_TX_COMP_QINQ_ERR			0x7
+#define LANCER_TX_COMP_SGE_ERR			0x9
 #define LANCER_TX_COMP_PARITY_ERR		0xb
 #define LANCER_TX_COMP_DMA_ERR			0xd
 

drivers/net/ethernet/emulex/benet/be_main.c

@@ -2583,7 +2583,48 @@ static void be_post_rx_frags(struct be_rx_obj *rxo, gfp_t gfp, u32 frags_needed)
 	}
 }
 
-static struct be_tx_compl_info *be_tx_compl_get(struct be_tx_obj *txo)
+static inline void be_update_tx_err(struct be_tx_obj *txo, u8 status)
+{
+	switch (status) {
+	case BE_TX_COMP_HDR_PARSE_ERR:
+		tx_stats(txo)->tx_hdr_parse_err++;
+		break;
+	case BE_TX_COMP_NDMA_ERR:
+		tx_stats(txo)->tx_dma_err++;
+		break;
+	case BE_TX_COMP_ACL_ERR:
+		tx_stats(txo)->tx_spoof_check_err++;
+		break;
+	}
+}
+
+static inline void lancer_update_tx_err(struct be_tx_obj *txo, u8 status)
+{
+	switch (status) {
+	case LANCER_TX_COMP_LSO_ERR:
+		tx_stats(txo)->tx_tso_err++;
+		break;
+	case LANCER_TX_COMP_HSW_DROP_MAC_ERR:
+	case LANCER_TX_COMP_HSW_DROP_VLAN_ERR:
+		tx_stats(txo)->tx_spoof_check_err++;
+		break;
+	case LANCER_TX_COMP_QINQ_ERR:
+		tx_stats(txo)->tx_qinq_err++;
+		break;
+	case LANCER_TX_COMP_PARITY_ERR:
+		tx_stats(txo)->tx_internal_parity_err++;
+		break;
+	case LANCER_TX_COMP_DMA_ERR:
+		tx_stats(txo)->tx_dma_err++;
+		break;
+	case LANCER_TX_COMP_SGE_ERR:
+		tx_stats(txo)->tx_sge_err++;
+		break;
+	}
+}
+
+static struct be_tx_compl_info *be_tx_compl_get(struct be_adapter *adapter,
+						struct be_tx_obj *txo)
 {
 	struct be_queue_info *tx_cq = &txo->cq;
 	struct be_tx_compl_info *txcp = &txo->txcp;
@@ -2599,6 +2640,24 @@ static struct be_tx_compl_info *be_tx_compl_get(struct be_tx_obj *txo)
 	txcp->status = GET_TX_COMPL_BITS(status, compl);
 	txcp->end_index = GET_TX_COMPL_BITS(wrb_index, compl);
 
+	if (txcp->status) {
+		if (lancer_chip(adapter)) {
+			lancer_update_tx_err(txo, txcp->status);
+			/* Reset the adapter incase of TSO,
+			 * SGE or Parity error
+			 */
+			if (txcp->status == LANCER_TX_COMP_LSO_ERR ||
+			    txcp->status == LANCER_TX_COMP_PARITY_ERR ||
+			    txcp->status == LANCER_TX_COMP_SGE_ERR)
+				be_set_error(adapter, BE_ERROR_TX);
+		} else {
+			be_update_tx_err(txo, txcp->status);
+		}
+	}
+
+	if (be_check_error(adapter, BE_ERROR_TX))
+		return NULL;
+
 	compl->dw[offsetof(struct amap_eth_tx_compl, valid) / 32] = 0;
 	queue_tail_inc(tx_cq);
 	return txcp;
@@ -2741,7 +2800,7 @@ static void be_tx_compl_clean(struct be_adapter *adapter)
 			cmpl = 0;
 			num_wrbs = 0;
 			txq = &txo->q;
-			while ((txcp = be_tx_compl_get(txo))) {
+			while ((txcp = be_tx_compl_get(adapter, txo))) {
 				num_wrbs +=
 					be_tx_compl_process(adapter, txo,
 							    txcp->end_index);
@@ -3120,59 +3179,16 @@ static int be_process_rx(struct be_rx_obj *rxo, struct napi_struct *napi,
 	return work_done;
 }
 
-static inline void be_update_tx_err(struct be_tx_obj *txo, u8 status)
-{
-	switch (status) {
-	case BE_TX_COMP_HDR_PARSE_ERR:
-		tx_stats(txo)->tx_hdr_parse_err++;
-		break;
-	case BE_TX_COMP_NDMA_ERR:
-		tx_stats(txo)->tx_dma_err++;
-		break;
-	case BE_TX_COMP_ACL_ERR:
-		tx_stats(txo)->tx_spoof_check_err++;
-		break;
-	}
-}
-
-static inline void lancer_update_tx_err(struct be_tx_obj *txo, u8 status)
-{
-	switch (status) {
-	case LANCER_TX_COMP_LSO_ERR:
-		tx_stats(txo)->tx_tso_err++;
-		break;
-	case LANCER_TX_COMP_HSW_DROP_MAC_ERR:
-	case LANCER_TX_COMP_HSW_DROP_VLAN_ERR:
-		tx_stats(txo)->tx_spoof_check_err++;
-		break;
-	case LANCER_TX_COMP_QINQ_ERR:
-		tx_stats(txo)->tx_qinq_err++;
-		break;
-	case LANCER_TX_COMP_PARITY_ERR:
-		tx_stats(txo)->tx_internal_parity_err++;
-		break;
-	case LANCER_TX_COMP_DMA_ERR:
-		tx_stats(txo)->tx_dma_err++;
-		break;
-	}
-}
 
 static void be_process_tx(struct be_adapter *adapter, struct be_tx_obj *txo,
 			  int idx)
 {
 	int num_wrbs = 0, work_done = 0;
 	struct be_tx_compl_info *txcp;
 
-	while ((txcp = be_tx_compl_get(txo))) {
+	while ((txcp = be_tx_compl_get(adapter, txo))) {
 		num_wrbs += be_tx_compl_process(adapter, txo, txcp->end_index);
 		work_done++;
-
-		if (txcp->status) {
-			if (lancer_chip(adapter))
-				lancer_update_tx_err(txo, txcp->status);
-			else
-				be_update_tx_err(txo, txcp->status);
-		}
 	}
 
 	if (work_done) {
@@ -5104,9 +5120,12 @@ static netdev_features_t be_features_check(struct sk_buff *skb,
 			features &= ~NETIF_F_TSO6;
 
 		/* Lancer cannot handle the packet with MSS less than 256.
+		 * Also it can't handle a TSO packet with a single segment
 		 * Disable the GSO support in such cases
 		 */
-		if (lancer_chip(adapter) && skb_shinfo(skb)->gso_size < 256)
+		if (lancer_chip(adapter) &&
+		    (skb_shinfo(skb)->gso_size < 256 ||
+		     skb_shinfo(skb)->gso_segs == 1))
 			features &= ~NETIF_F_GSO_MASK;
 	}
 

drivers/net/ethernet/ibm/ibmvnic.c

@@ -3286,7 +3286,7 @@ static void handle_vpd_rsp(union ibmvnic_crq *crq,
 			   struct ibmvnic_adapter *adapter)
 {
 	struct device *dev = &adapter->vdev->dev;
-	unsigned char *substr = NULL, *ptr = NULL;
+	unsigned char *substr = NULL;
 	u8 fw_level_len = 0;
 
 	memset(adapter->fw_version, 0, 32);
@@ -3306,10 +3306,6 @@ static void handle_vpd_rsp(union ibmvnic_crq *crq,
 	substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
 	if (!substr) {
 		dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
-		ptr = strncpy((char *)adapter->fw_version, "N/A",
-			      3 * sizeof(char));
-		if (!ptr)
-			dev_err(dev, "Failed to inform that firmware version is unavailable to the adapter\n");
 		goto complete;
 	}
 
@@ -3324,16 +3320,14 @@ static void handle_vpd_rsp(union ibmvnic_crq *crq,
 	/* copy firmware version string from vpd into adapter */
 	if ((substr + 3 + fw_level_len) <
 	    (adapter->vpd->buff + adapter->vpd->len)) {
-		ptr = strncpy((char *)adapter->fw_version,
-			      substr + 3, fw_level_len);
-
-		if (!ptr)
-			dev_err(dev, "Failed to isolate FW level string\n");
+		strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
 	} else {
 		dev_info(dev, "FW substr extrapolated VPD buff\n");
 	}
 
 complete:
+	if (adapter->fw_version[0] == '\0')
+		strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
 	complete(&adapter->fw_done);
 }
 

drivers/net/ethernet/netronome/nfp/bpf/main.h

@@ -112,22 +112,22 @@ enum pkt_vec {
  * @map_elems_in_use:	number of elements allocated to offloaded maps
  *
  * @adjust_head:	adjust head capability
- * @flags:		extra flags for adjust head
- * @off_min:		minimal packet offset within buffer required
- * @off_max:		maximum packet offset within buffer required
- * @guaranteed_sub:	amount of negative adjustment guaranteed possible
- * @guaranteed_add:	amount of positive adjustment guaranteed possible
+ * @adjust_head.flags:		extra flags for adjust head
+ * @adjust_head.off_min:	minimal packet offset within buffer required
+ * @adjust_head.off_max:	maximum packet offset within buffer required
+ * @adjust_head.guaranteed_sub:	negative adjustment guaranteed possible
+ * @adjust_head.guaranteed_add:	positive adjustment guaranteed possible
  *
  * @maps:		map capability
- * @types:		supported map types
- * @max_maps:		max number of maps supported
- * @max_elems:		max number of entries in each map
- * @max_key_sz:		max size of map key
- * @max_val_sz:		max size of map value
- * @max_elem_sz:	max size of map entry (key + value)
+ * @maps.types:			supported map types
+ * @maps.max_maps:		max number of maps supported
+ * @maps.max_elems:		max number of entries in each map
+ * @maps.max_key_sz:		max size of map key
+ * @maps.max_val_sz:		max size of map value
+ * @maps.max_elem_sz:		max size of map entry (key + value)
  *
  * @helpers:		helper addressess for various calls
- * @map_lookup:		map lookup helper address
+ * @helpers.map_lookup:		map lookup helper address
  */
 struct nfp_app_bpf {
 	struct nfp_app *app;

drivers/net/ethernet/netronome/nfp/flower/tunnel_conf.c

@@ -50,9 +50,9 @@
  * @seq:		sequence number of the message
  * @count:		number of tunnels report in message
  * @flags:		options part of the request
- * @ipv4:		dest IPv4 address of active route
- * @egress_port:	port the encapsulated packet egressed
- * @extra:		reserved for future use
+ * @tun_info.ipv4:		dest IPv4 address of active route
+ * @tun_info.egress_port:	port the encapsulated packet egressed
+ * @tun_info.extra:		reserved for future use
  * @tun_info:		tunnels that have sent traffic in reported period
  */
 struct nfp_tun_active_tuns {
@@ -132,8 +132,8 @@ struct nfp_ipv4_addr_entry {
  * struct nfp_tun_mac_addr - configure MAC address of tunnel EP on NFP
  * @reserved:	reserved for future use
  * @count:	number of MAC addresses in the message
- * @index:	index of MAC address in the lookup table
- * @addr:	interface MAC address
+ * @addresses.index:	index of MAC address in the lookup table
+ * @addresses.addr:	interface MAC address
  * @addresses:	series of MACs to offload
  */
 struct nfp_tun_mac_addr {

drivers/net/ethernet/netronome/nfp/nfp_net.h

@@ -193,7 +193,8 @@ struct nfp_net_tx_desc {
 
 /**
  * struct nfp_net_tx_buf - software TX buffer descriptor
- * @skb:	sk_buff associated with this buffer
+ * @skb:	normal ring, sk_buff associated with this buffer
+ * @frag:	XDP ring, page frag associated with this buffer
  * @dma_addr:	DMA mapping address of the buffer
  * @fidx:	Fragment index (-1 for the head and [0..nr_frags-1] for frags)
  * @pkt_cnt:	Number of packets to be produced out of the skb associated
@@ -377,6 +378,9 @@ struct nfp_net_rx_ring {
  * struct nfp_net_r_vector - Per ring interrupt vector configuration
  * @nfp_net:        Backpointer to nfp_net structure
  * @napi:           NAPI structure for this ring vec
+ * @tasklet:        ctrl vNIC, tasklet for servicing the r_vec
+ * @queue:          ctrl vNIC, send queue
+ * @lock:           ctrl vNIC, r_vec lock protects @queue
  * @tx_ring:        Pointer to TX ring
  * @rx_ring:        Pointer to RX ring
  * @xdp_ring:	    Pointer to an extra TX ring for XDP