linux-kernel - [PATCH net v5 0/4] Fix race conditions in ndo_get

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Message-ID: <20250109103221.2544467-1-srasheed@marvell.com>
Date: Thu, 9 Jan 2025 02:32:16 -0800
From: Shinas Rasheed <srasheed@...vell.com>
To: <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC: <hgani@...vell.com>, <sedara@...vell.com>, <vimleshk@...vell.com>,
        <thaller@...hat.com>, <wizhao@...hat.com>, <kheib@...hat.com>,
        <konguyen@...hat.com>, <horms@...nel.org>, <einstein.xue@...axg.com>,
        "Shinas
 Rasheed" <srasheed@...vell.com>
Subject: [PATCH net v5 0/4] Fix race conditions in ndo_get_stats64

Fix race conditions in ndo_get_stats64 by storing tx/rx stats
locally and not availing per queue resources which could be torn
down during interface stop. Also remove stats fetch from
firmware which is currently unnecessary

Changes:
V5:
  - Store tx/rx stats locally and avail use stats in ndo_get_stats64()
    instead of availing per queue resources there.

V4: https://lore.kernel.org/all/20250102112246.2494230-1-srasheed@marvell.com/
  - Check if netdev is running, as decision for accessing resources
    rather than availing lock implementations, in ndo_get_stats64()

V3: https://lore.kernel.org/all/20241218115111.2407958-1-srasheed@marvell.com/
  - Added warn log that happened due to rcu_read_lock in commit message

V2: https://lore.kernel.org/all/20241216075842.2394606-1-srasheed@marvell.com/
  - Changed sync mechanism to fix race conditions from using an atomic
    set_bit ops to a much simpler synchronize_net()

V1: https://lore.kernel.org/all/20241203072130.2316913-1-srasheed@marvell.com/

Shinas Rasheed (4):
  octeon_ep: update tx/rx stats locally for persistence
  octeon_ep: remove firmware stats fetch in ndo_get_stats64
  octeon_ep_vf: update tx/rx stats locally for persistence
  octeon_ep_vf: remove firmware stats fetch in ndo_get_stats64

 .../marvell/octeon_ep/octep_ethtool.c         | 41 +++++++----------
 .../ethernet/marvell/octeon_ep/octep_main.c   | 45 +++++++------------
 .../ethernet/marvell/octeon_ep/octep_main.h   | 11 +++++
 .../net/ethernet/marvell/octeon_ep/octep_rx.c | 12 ++---
 .../net/ethernet/marvell/octeon_ep/octep_rx.h |  4 +-
 .../net/ethernet/marvell/octeon_ep/octep_tx.c |  7 +--
 .../net/ethernet/marvell/octeon_ep/octep_tx.h |  4 +-
 .../marvell/octeon_ep_vf/octep_vf_ethtool.c   | 29 +++++-------
 .../marvell/octeon_ep_vf/octep_vf_main.c      | 42 +++++++----------
 .../marvell/octeon_ep_vf/octep_vf_main.h      | 11 +++++
 .../marvell/octeon_ep_vf/octep_vf_rx.c        | 10 +++--
 .../marvell/octeon_ep_vf/octep_vf_rx.h        |  2 +-
 .../marvell/octeon_ep_vf/octep_vf_tx.c        |  7 +--
 .../marvell/octeon_ep_vf/octep_vf_tx.h        |  2 +-
 14 files changed, 108 insertions(+), 119 deletions(-)

-- 
2.25.1