Merge tag 'net-5.15-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

Pull networking fixes from Jakub Kicinski:
 "Quite calm.

  The noisy DSA driver (embedded switches) changes, and adjustment to
  IPv6 IOAM behavior add to diffstat's bottom line but are not scary.

  Current release - regressions:

   - af_unix: rename UNIX-DGRAM to UNIX to maintain backwards
     compatibility

   - procfs: revert "add seq_puts() statement for dev_mcast", minor
     format change broke user space

  Current release - new code bugs:

   - dsa: fix bridge_num not getting cleared after ports leaving the
     bridge, resource leak

   - dsa: tag_dsa: send packets with TX fwd offload from VLAN-unaware
     bridges using VID 0, prevent packet drops if pvid is removed

   - dsa: mv88e6xxx: keep the pvid at 0 when VLAN-unaware, prevent HW
     getting confused about station to VLAN mapping

  Previous releases - regressions:

   - virtio-net: fix for skb_over_panic inside big mode

   - phy: do not shutdown PHYs in READY state

   - dsa: mv88e6xxx: don't use PHY_DETECT on internal PHY's, fix link
     LED staying lit after ifdown

   - mptcp: fix possible infinite wait on recvmsg(MSG_WAITALL)

   - mqprio: Correct stats in mqprio_dump_class_stats()

   - ice: fix deadlock for Tx timestamp tracking flush

   - stmmac: fix feature detection on old hardware

  Previous releases - always broken:

   - sctp: account stream padding length for reconf chunk

   - icmp: fix icmp_ext_echo_iio parsing in icmp_build_probe()

   - isdn: cpai: check ctr->cnr to avoid array index out of bound

   - isdn: mISDN: fix sleeping function called from invalid context

   - nfc: nci: fix potential UAF of rf_conn_info object

   - dsa: microchip: prevent ksz_mib_read_work from kicking back in
     after it's canceled in .remove and crashing

   - dsa: mv88e6xxx: isolate the ATU databases of standalone and bridged
     ports

   - dsa: sja1105, ocelot: break circular dependency between switch and
     tag drivers

   - dsa: felix: improve timestamping in presence of packe loss

   - mlxsw: thermal: fix out-of-bounds memory accesses

  Misc:

   - ipv6: ioam: move the check for undefined bits to improve
     interoperability"

* tag 'net-5.15-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (60 commits)
  icmp: fix icmp_ext_echo_iio parsing in icmp_build_probe
  MAINTAINERS: Update the devicetree documentation path of imx fec driver
  sctp: account stream padding length for reconf chunk
  mlxsw: thermal: Fix out-of-bounds memory accesses
  ethernet: s2io: fix setting mac address during resume
  NFC: digital: fix possible memory leak in digital_in_send_sdd_req()
  NFC: digital: fix possible memory leak in digital_tg_listen_mdaa()
  nfc: fix error handling of nfc_proto_register()
  Revert "net: procfs: add seq_puts() statement for dev_mcast"
  net: encx24j600: check error in devm_regmap_init_encx24j600
  net: korina: select CRC32
  net: arc: select CRC32
  net: dsa: felix: break at first CPU port during init and teardown
  net: dsa: tag_ocelot_8021q: fix inability to inject STP BPDUs into BLOCKING ports
  net: dsa: felix: purge skb from TX timestamping queue if it cannot be sent
  net: dsa: tag_ocelot_8021q: break circular dependency with ocelot switch lib
  net: dsa: tag_ocelot: break circular dependency with ocelot switch lib driver
  net: mscc: ocelot: cross-check the sequence id from the timestamp FIFO with the skb PTP header
  net: mscc: ocelot: deny TX timestamping of non-PTP packets
  net: mscc: ocelot: warn when a PTP IRQ is raised for an unknown skb
  ...

1 files changed, 49 insertions, 0 deletions

diff --git a/include/linux/dsa/ocelot.h b/include/linux/dsa/ocelot.h
index 435777a0073c..8ae999f587c4 100644
--- a/include/linux/dsa/ocelot.h
+++ b/include/linux/dsa/ocelot.h
@@ -5,7 +5,28 @@
 #ifndef _NET_DSA_TAG_OCELOT_H
 #define _NET_DSA_TAG_OCELOT_H
 
+#include <linux/kthread.h>
 #include <linux/packing.h>
+#include <linux/skbuff.h>
+
+struct ocelot_skb_cb {
+	struct sk_buff *clone;
+	unsigned int ptp_class; /* valid only for clones */
+	u8 ptp_cmd;
+	u8 ts_id;
+};
+
+#define OCELOT_SKB_CB(skb) \
+	((struct ocelot_skb_cb *)((skb)->cb))
+
+#define IFH_TAG_TYPE_C			0
+#define IFH_TAG_TYPE_S			1
+
+#define IFH_REW_OP_NOOP			0x0
+#define IFH_REW_OP_DSCP			0x1
+#define IFH_REW_OP_ONE_STEP_PTP		0x2
+#define IFH_REW_OP_TWO_STEP_PTP		0x3
+#define IFH_REW_OP_ORIGIN_PTP		0x5
 
 #define OCELOT_TAG_LEN			16
 #define OCELOT_SHORT_PREFIX_LEN		4
@@ -140,6 +161,17 @@
  *         +------+------+------+------+------+------+------+------+
  */
 
+struct felix_deferred_xmit_work {
+	struct dsa_port *dp;
+	struct sk_buff *skb;
+	struct kthread_work work;
+};
+
+struct felix_port {
+	void (*xmit_work_fn)(struct kthread_work *work);
+	struct kthread_worker *xmit_worker;
+};
+
 static inline void ocelot_xfh_get_rew_val(void *extraction, u64 *rew_val)
 {
 	packing(extraction, rew_val, 116, 85, OCELOT_TAG_LEN, UNPACK, 0);
@@ -215,4 +247,21 @@ static inline void ocelot_ifh_set_vid(void *injection, u64 vid)
 	packing(injection, &vid, 11, 0, OCELOT_TAG_LEN, PACK, 0);
 }
 
+/* Determine the PTP REW_OP to use for injecting the given skb */
+static inline u32 ocelot_ptp_rew_op(struct sk_buff *skb)
+{
+	struct sk_buff *clone = OCELOT_SKB_CB(skb)->clone;
+	u8 ptp_cmd = OCELOT_SKB_CB(skb)->ptp_cmd;
+	u32 rew_op = 0;
+
+	if (ptp_cmd == IFH_REW_OP_TWO_STEP_PTP && clone) {
+		rew_op = ptp_cmd;
+		rew_op |= OCELOT_SKB_CB(clone)->ts_id << 3;
+	} else if (ptp_cmd == IFH_REW_OP_ORIGIN_PTP) {
+		rew_op = ptp_cmd;
+	}
+
+	return rew_op;
+}
+
 #endif