Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 359 insertions, 0 deletions

diff --git a/drivers/target/tcm_fc/tfc_io.c b/drivers/target/tcm_fc/tfc_io.c
new file mode 100644
index 000000000..bbe2e2961
--- /dev/null
+++ b/drivers/target/tcm_fc/tfc_io.c
@@ -0,0 +1,359 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2010 Cisco Systems, Inc.
+ *
+ * Portions based on tcm_loop_fabric_scsi.c and libfc/fc_fcp.c
+ *
+ * Copyright (c) 2007 Intel Corporation. All rights reserved.
+ * Copyright (c) 2008 Red Hat, Inc.  All rights reserved.
+ * Copyright (c) 2008 Mike Christie
+ * Copyright (c) 2009 Rising Tide, Inc.
+ * Copyright (c) 2009 Linux-iSCSI.org
+ * Copyright (c) 2009 Nicholas A. Bellinger <nab@linux-iscsi.org>
+ */
+
+/* XXX TBD some includes may be extraneous */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/utsname.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/kthread.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/configfs.h>
+#include <linux/ctype.h>
+#include <linux/hash.h>
+#include <linux/ratelimit.h>
+#include <asm/unaligned.h>
+#include <scsi/libfc.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_fabric.h>
+
+#include "tcm_fc.h"
+
+/*
+ * Deliver read data back to initiator.
+ * XXX TBD handle resource problems later.
+ */
+int ft_queue_data_in(struct se_cmd *se_cmd)
+{
+	struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd);
+	struct fc_frame *fp = NULL;
+	struct fc_exch *ep;
+	struct fc_lport *lport;
+	struct scatterlist *sg = NULL;
+	size_t remaining;
+	u32 f_ctl = FC_FC_EX_CTX | FC_FC_REL_OFF;
+	u32 mem_off = 0;
+	u32 fh_off = 0;
+	u32 frame_off = 0;
+	size_t frame_len = 0;
+	size_t mem_len = 0;
+	size_t tlen;
+	size_t off_in_page;
+	struct page *page = NULL;
+	int use_sg;
+	int error;
+	void *page_addr;
+	void *from;
+	void *to = NULL;
+
+	if (cmd->aborted)
+		return 0;
+
+	if (se_cmd->scsi_status == SAM_STAT_TASK_SET_FULL)
+		goto queue_status;
+
+	ep = fc_seq_exch(cmd->seq);
+	lport = ep->lp;
+	cmd->seq = fc_seq_start_next(cmd->seq);
+
+	remaining = se_cmd->data_length;
+
+	/*
+	 * Setup to use first mem list entry, unless no data.
+	 */
+	BUG_ON(remaining && !se_cmd->t_data_sg);
+	if (remaining) {
+		sg = se_cmd->t_data_sg;
+		mem_len = sg->length;
+		mem_off = sg->offset;
+		page = sg_page(sg);
+	}
+
+	/* no scatter/gather in skb for odd word length due to fc_seq_send() */
+	use_sg = !(remaining % 4);
+
+	while (remaining) {
+		struct fc_seq *seq = cmd->seq;
+
+		if (!seq) {
+			pr_debug("%s: Command aborted, xid 0x%x\n",
+				 __func__, ep->xid);
+			break;
+		}
+		if (!mem_len) {
+			sg = sg_next(sg);
+			mem_len = min((size_t)sg->length, remaining);
+			mem_off = sg->offset;
+			page = sg_page(sg);
+		}
+		if (!frame_len) {
+			/*
+			 * If lport's has capability of Large Send Offload LSO)
+			 * , then allow 'frame_len' to be as big as 'lso_max'
+			 * if indicated transfer length is >= lport->lso_max
+			 */
+			frame_len = (lport->seq_offload) ? lport->lso_max :
+							  cmd->sess->max_frame;
+			frame_len = min(frame_len, remaining);
+			fp = fc_frame_alloc(lport, use_sg ? 0 : frame_len);
+			if (!fp)
+				return -ENOMEM;
+			to = fc_frame_payload_get(fp, 0);
+			fh_off = frame_off;
+			frame_off += frame_len;
+			/*
+			 * Setup the frame's max payload which is used by base
+			 * driver to indicate HW about max frame size, so that
+			 * HW can do fragmentation appropriately based on
+			 * "gso_max_size" of underline netdev.
+			 */
+			fr_max_payload(fp) = cmd->sess->max_frame;
+		}
+		tlen = min(mem_len, frame_len);
+
+		if (use_sg) {
+			off_in_page = mem_off;
+			BUG_ON(!page);
+			get_page(page);
+			skb_fill_page_desc(fp_skb(fp),
+					   skb_shinfo(fp_skb(fp))->nr_frags,
+					   page, off_in_page, tlen);
+			fr_len(fp) += tlen;
+			fp_skb(fp)->data_len += tlen;
+			fp_skb(fp)->truesize += page_size(page);
+		} else {
+			BUG_ON(!page);
+			from = kmap_atomic(page + (mem_off >> PAGE_SHIFT));
+			page_addr = from;
+			from += offset_in_page(mem_off);
+			tlen = min(tlen, (size_t)(PAGE_SIZE -
+						offset_in_page(mem_off)));
+			memcpy(to, from, tlen);
+			kunmap_atomic(page_addr);
+			to += tlen;
+		}
+
+		mem_off += tlen;
+		mem_len -= tlen;
+		frame_len -= tlen;
+		remaining -= tlen;
+
+		if (frame_len &&
+		    (skb_shinfo(fp_skb(fp))->nr_frags < FC_FRAME_SG_LEN))
+			continue;
+		if (!remaining)
+			f_ctl |= FC_FC_END_SEQ;
+		fc_fill_fc_hdr(fp, FC_RCTL_DD_SOL_DATA, ep->did, ep->sid,
+			       FC_TYPE_FCP, f_ctl, fh_off);
+		error = fc_seq_send(lport, seq, fp);
+		if (error) {
+			pr_info_ratelimited("%s: Failed to send frame %p, "
+						"xid <0x%x>, remaining %zu, "
+						"lso_max <0x%x>\n",
+						__func__, fp, ep->xid,
+						remaining, lport->lso_max);
+			/*
+			 * Go ahead and set TASK_SET_FULL status ignoring the
+			 * rest of the DataIN, and immediately attempt to
+			 * send the response via ft_queue_status() in order
+			 * to notify the initiator that it should reduce it's
+			 * per LUN queue_depth.
+			 */
+			se_cmd->scsi_status = SAM_STAT_TASK_SET_FULL;
+			break;
+		}
+	}
+queue_status:
+	return ft_queue_status(se_cmd);
+}
+
+static void ft_execute_work(struct work_struct *work)
+{
+	struct ft_cmd *cmd = container_of(work, struct ft_cmd, work);
+
+	target_execute_cmd(&cmd->se_cmd);
+}
+
+/*
+ * Receive write data frame.
+ */
+void ft_recv_write_data(struct ft_cmd *cmd, struct fc_frame *fp)
+{
+	struct se_cmd *se_cmd = &cmd->se_cmd;
+	struct fc_seq *seq = cmd->seq;
+	struct fc_exch *ep;
+	struct fc_lport *lport;
+	struct fc_frame_header *fh;
+	struct scatterlist *sg = NULL;
+	u32 mem_off = 0;
+	u32 rel_off;
+	size_t frame_len;
+	size_t mem_len = 0;
+	size_t tlen;
+	struct page *page = NULL;
+	void *page_addr;
+	void *from;
+	void *to;
+	u32 f_ctl;
+	void *buf;
+
+	fh = fc_frame_header_get(fp);
+	if (!(ntoh24(fh->fh_f_ctl) & FC_FC_REL_OFF))
+		goto drop;
+
+	f_ctl = ntoh24(fh->fh_f_ctl);
+	ep = fc_seq_exch(seq);
+	lport = ep->lp;
+	if (cmd->was_ddp_setup) {
+		BUG_ON(!lport);
+		/*
+		 * Since DDP (Large Rx offload) was setup for this request,
+		 * payload is expected to be copied directly to user buffers.
+		 */
+		buf = fc_frame_payload_get(fp, 1);
+		if (buf)
+			pr_err("%s: xid 0x%x, f_ctl 0x%x, cmd->sg %p, "
+				"cmd->sg_cnt 0x%x. DDP was setup"
+				" hence not expected to receive frame with "
+				"payload, Frame will be dropped if"
+				"'Sequence Initiative' bit in f_ctl is"
+				"not set\n", __func__, ep->xid, f_ctl,
+				se_cmd->t_data_sg, se_cmd->t_data_nents);
+		/*
+		 * Invalidate HW DDP context if it was setup for respective
+		 * command. Invalidation of HW DDP context is requited in both
+		 * situation (success and error).
+		 */
+		ft_invl_hw_context(cmd);
+
+		/*
+		 * If "Sequence Initiative (TSI)" bit set in f_ctl, means last
+		 * write data frame is received successfully where payload is
+		 * posted directly to user buffer and only the last frame's
+		 * header is posted in receive queue.
+		 *
+		 * If "Sequence Initiative (TSI)" bit is not set, means error
+		 * condition w.r.t. DDP, hence drop the packet and let explict
+		 * ABORTS from other end of exchange timer trigger the recovery.
+		 */
+		if (f_ctl & FC_FC_SEQ_INIT)
+			goto last_frame;
+		else
+			goto drop;
+	}
+
+	rel_off = ntohl(fh->fh_parm_offset);
+	frame_len = fr_len(fp);
+	if (frame_len <= sizeof(*fh))
+		goto drop;
+	frame_len -= sizeof(*fh);
+	from = fc_frame_payload_get(fp, 0);
+	if (rel_off >= se_cmd->data_length)
+		goto drop;
+	if (frame_len + rel_off > se_cmd->data_length)
+		frame_len = se_cmd->data_length - rel_off;
+
+	/*
+	 * Setup to use first mem list entry, unless no data.
+	 */
+	BUG_ON(frame_len && !se_cmd->t_data_sg);
+	if (frame_len) {
+		sg = se_cmd->t_data_sg;
+		mem_len = sg->length;
+		mem_off = sg->offset;
+		page = sg_page(sg);
+	}
+
+	while (frame_len) {
+		if (!mem_len) {
+			sg = sg_next(sg);
+			mem_len = sg->length;
+			mem_off = sg->offset;
+			page = sg_page(sg);
+		}
+		if (rel_off >= mem_len) {
+			rel_off -= mem_len;
+			mem_len = 0;
+			continue;
+		}
+		mem_off += rel_off;
+		mem_len -= rel_off;
+		rel_off = 0;
+
+		tlen = min(mem_len, frame_len);
+
+		to = kmap_atomic(page + (mem_off >> PAGE_SHIFT));
+		page_addr = to;
+		to += offset_in_page(mem_off);
+		tlen = min(tlen, (size_t)(PAGE_SIZE -
+					  offset_in_page(mem_off)));
+		memcpy(to, from, tlen);
+		kunmap_atomic(page_addr);
+
+		from += tlen;
+		frame_len -= tlen;
+		mem_off += tlen;
+		mem_len -= tlen;
+		cmd->write_data_len += tlen;
+	}
+last_frame:
+	if (cmd->write_data_len == se_cmd->data_length) {
+		INIT_WORK(&cmd->work, ft_execute_work);
+		queue_work(cmd->sess->tport->tpg->workqueue, &cmd->work);
+	}
+drop:
+	fc_frame_free(fp);
+}
+
+/*
+ * Handle and cleanup any HW specific resources if
+ * received ABORTS, errors, timeouts.
+ */
+void ft_invl_hw_context(struct ft_cmd *cmd)
+{
+	struct fc_seq *seq;
+	struct fc_exch *ep = NULL;
+	struct fc_lport *lport = NULL;
+
+	BUG_ON(!cmd);
+	seq = cmd->seq;
+
+	/* Cleanup the DDP context in HW if DDP was setup */
+	if (cmd->was_ddp_setup && seq) {
+		ep = fc_seq_exch(seq);
+		if (ep) {
+			lport = ep->lp;
+			if (lport && (ep->xid <= lport->lro_xid)) {
+				/*
+				 * "ddp_done" trigger invalidation of HW
+				 * specific DDP context
+				 */
+				cmd->write_data_len = lport->tt.ddp_done(lport,
+								      ep->xid);
+
+				/*
+				 * Resetting same variable to indicate HW's
+				 * DDP context has been invalidated to avoid
+				 * re_invalidation of same context (context is
+				 * identified using ep->xid)
+				 */
+				cmd->was_ddp_setup = 0;
+			}
+		}
+	}
+}