netdev - [PATCH v2 net-next 0/9] Remove skb_mac_header() dependency in DSA xmit path

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Date:   Fri, 21 Apr 2023 01:55:52 +0300
From:   Vladimir Oltean <vladimir.oltean@....com>
To:     netdev@...r.kernel.org
Cc:     "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        linux-kernel@...r.kernel.org, Madalin Bucur <madalin.bucur@....com>
Subject: [PATCH v2 net-next 0/9] Remove skb_mac_header() dependency in DSA xmit path

Eric started working on removing skb_mac_header() assumptions from the
networking xmit path, and I offered to help for DSA:
https://lore.kernel.org/netdev/20230321164519.1286357-1-edumazet@google.com/

The majority of this patch set is a straightforward replacement of
skb_mac_header() with skb->data (hidden either behind skb_eth_hdr(), or
behind skb_vlan_eth_hdr()). The only patch which is more "interesting"
is 9/9.

Another potential caller of __skb_vlan_pop() on xmit (and therefore
also of skb_mac_header()) is tcf_vlan_act(), but I haven't had the time
to investigate that (enough to submit changes other than what's here).

v1->v2:
- 09/09: document the vlan_tci argument of vlan_remove_tag() in the kdoc

v1 at:
https://lore.kernel.org/netdev/20230322233823.1806736-1-vladimir.oltean@nxp.com/

Cc: Madalin Bucur <madalin.bucur@....com>

Vladimir Oltean (9):
  net: vlan: don't adjust MAC header in __vlan_insert_inner_tag() unless
    set
  net: vlan: introduce skb_vlan_eth_hdr()
  net: dpaa: avoid one skb_reset_mac_header() in dpaa_enable_tx_csum()
  net: dsa: tag_ocelot: do not rely on skb_mac_header() for VLAN xmit
  net: dsa: tag_ksz: do not rely on skb_mac_header() in TX paths
  net: dsa: tag_sja1105: don't rely on skb_mac_header() in TX paths
  net: dsa: tag_sja1105: replace skb_mac_header() with vlan_eth_hdr()
  net: dsa: update TX path comments to not mention skb_mac_header()
  net: dsa: tag_ocelot: call only the relevant portion of
    __skb_vlan_pop() on TX

 .../net/ethernet/broadcom/bnx2x/bnx2x_cmn.c   |  3 +-
 drivers/net/ethernet/emulex/benet/be_main.c   |  2 +-
 .../net/ethernet/freescale/dpaa/dpaa_eth.c    |  9 ++---
 .../net/ethernet/hisilicon/hns3/hns3_enet.c   |  2 +-
 drivers/net/ethernet/intel/i40e/i40e_txrx.c   |  2 +-
 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c |  2 +-
 .../ethernet/qlogic/netxen/netxen_nic_main.c  |  2 +-
 .../net/ethernet/qlogic/qlcnic/qlcnic_io.c    |  4 +--
 drivers/net/ethernet/sfc/tx_tso.c             |  2 +-
 .../net/ethernet/stmicro/stmmac/stmmac_main.c |  7 ++--
 drivers/staging/gdm724x/gdm_lte.c             |  4 +--
 include/linux/if_vlan.h                       | 36 +++++++++++++++++--
 net/batman-adv/soft-interface.c               |  2 +-
 net/core/skbuff.c                             |  8 +----
 net/dsa/tag.h                                 |  2 +-
 net/dsa/tag_8021q.c                           |  4 +--
 net/dsa/tag_ksz.c                             | 18 +++++-----
 net/dsa/tag_ocelot.c                          |  4 +--
 net/dsa/tag_sja1105.c                         |  4 +--
 19 files changed, 66 insertions(+), 51 deletions(-)

-- 
2.34.1