[PATCH net-next v8 0/3] net: ethtool: Introduce ethnl dump helpers

[Maxime Chevallier <maxime.chevallier@bootlin.com>]

Hi everyone,

This is V8 for per-phy DUMP helpers, improving support for ->dumpit()
operations for PHY targetting commands.

This V8 fixes some issues spotted by Jakub (thanks !) on the multi-part
DUMP sequence. The netdev reftracking was reworked to make sure that
during a filtered DUMP, we only keep a ref on the netdev during
individual .dumpit() calls.

Thanks,

Maxime

Changes in V8:
 - Fixed the dump process WRT refcounting
 - Reset the pos_phyindex for non-filtered DUMP
 - Reworked kdoc and comments

Changes in V7:
 - Move from dev_hold to netdev_hold()
 - Add an extra patch fr dev_hold() conversion.

Changes in V6:
 - Squash pse and plca patches into the first one, to avoid unused
   functions (Jakub)

Changes in V5:
 - Move to a less generic approach, focusing only on the PHY case.

Changes in V4:
 - Don't grab rcu_read_lock when we already have a refcounter netdev on
   the filtered dump path (Paolo)
 - Move the dump_all stuff in a dedicated helper (Paolo)
 - Added patch 1 to set the dev in ctx->req_info

Changes in V3:
 - Fixed some typos and xmas tree issues
 - Added a missing check for EOPNOTSUPP in patch 1
 - Added missing kdoc
 - Added missing comments in phy_reply_size

Changes in V2:
 - Rebased on the netdev_lock work by Stanislav and the fixes from Eric
 - Fixed a bissectability issue
 - Fixed kdoc for the new ethnl ops and fields

V1: https://lore.kernel.org/netdev/20250305141938.319282-1-maxime.chevallier@bootlin.com/
V2: https://lore.kernel.org/netdev/20250308155440.267782-1-maxime.chevallier@bootlin.com/
V3: https://lore.kernel.org/netdev/20250313182647.250007-1-maxime.chevallier@bootlin.com/
V4: https://lore.kernel.org/netdev/20250324104012.367366-1-maxime.chevallier@bootlin.com/
V5: https://lore.kernel.org/netdev/20250410123350.174105-1-maxime.chevallier@bootlin.com/
V6: https://lore.kernel.org/netdev/20250415085155.132963-1-maxime.chevallier@bootlin.com/
V7: https://lore.kernel.org/netdev/20250422161717.164440-1-maxime.chevallier@bootlin.com/

Maxime Chevallier (3):
  net: ethtool: Introduce per-PHY DUMP operations
  net: ethtool: phy: Convert the PHY_GET command to generic phy dump
  net: ethtool: netlink: Use netdev_hold for dumpit() operations

 net/ethtool/netlink.c | 217 +++++++++++++++++++++++++--
 net/ethtool/netlink.h |   4 -
 net/ethtool/phy.c     | 342 ++++++++++++------------------------------
 3 files changed, 298 insertions(+), 265 deletions(-)

-- 
2.49.0