[PATCH net v9 0/4] Fix race conditions in ndo_get_stats64

[Shinas Rasheed]

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:
V9:
  - Iterate over OCTEP_MAX_QUEUES or OCTEP_VF_MAX_QUEUES in the
    respective ndo_get_stats64() function, rather than just the active
    queues.
  - Update commit messages of 1/4 and 3/4 to reflect reordering.

V8: https://lore.kernel.org/all/20250116083825.2581885-1-srasheed@xxxxxxxxxxx/
  - Reordered patches

V7: https://lore.kernel.org/all/20250114125124.2570660-1-srasheed@xxxxxxxxxxx/
  - Updated octep_get_stats64() to be reentrant

V6: https://lore.kernel.org/all/20250110122730.2551863-1-srasheed@xxxxxxxxxxx/
  - Corrected patch 2/4 which was not applying properly

V5: https://lore.kernel.org/all/20250109103221.2544467-1-srasheed@xxxxxxxxxxx/
  - 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@xxxxxxxxxxx/
  - 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@xxxxxxxxxxx/
  - Added warn log that happened due to rcu_read_lock in commit message

V2: https://lore.kernel.org/all/20241216075842.2394606-1-srasheed@xxxxxxxxxxx/
  - 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@xxxxxxxxxxx/

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

 .../marvell/octeon_ep/octep_ethtool.c         | 41 ++++++++-----------
 .../ethernet/marvell/octeon_ep/octep_main.c   | 29 ++++---------
 .../ethernet/marvell/octeon_ep/octep_main.h   |  6 +++
 .../net/ethernet/marvell/octeon_ep/octep_rx.c | 11 ++---
 .../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      | 25 ++++-------
 .../marvell/octeon_ep_vf/octep_vf_main.h      |  6 +++
 .../marvell/octeon_ep_vf/octep_vf_rx.c        |  9 ++--
 .../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, 80 insertions(+), 102 deletions(-)

-- 
2.25.1