6.8 Kernel Breaking Changes on Mellanox OFED 5.8

Infrastructure & Networking Software And Drivers Mellanox OFED
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1. Linux kernel recently dropped the strlcpy function

Compilation Error

/home/ubuntu/mellanox/mlnx-en-5.8-5.1.1.2-ubuntu22.04-x86_64/src/MLNX_EN_SRC-5.8-5.1.1.2/SOURCES/mlnx-en-5.8/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c:46.o:9: error: implicit declaration of function ‘strlcpy’; did you mean ‘strscpy’? [-Werror=implicit-function-declaration]                                              htool.o
   46 |         strlcpy(drvinfo->driver, KBUILD_MODNAME, sizeof(drvinfo->driver));                                                                                  n function ‘mlx5e_ethtool_get_drvinfo’:
      |         ^~~~~~~                                                                                                                                             :9: error: implicit declaration of function ‘strlcpy’; did you mean ‘s
      |         strscpy

Fix for this is to replace strlcpy with strscpy

Reference: Merge tag 'strlcpy-removal-v6.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux - kernel/git/torvalds/linux.git - Linux kernel source tree

2. uuid_le was was moved to MEI namespace in the newer kernels

Compilation Error

/var/lib/dkms/mlnx-en/5.8/build/include/linux/mod_devicetable.h:725:9: error: unknown type name 'uuid_le'
  725 |         uuid_le uuid;
      |         ^~~~~~~

include/linux/uuid.h used to import “uapi/linux/uuid.h” which had uuid_le definition in the previous releases.

  • 5.15 Kernel: git.launchpad .net/~ubuntu-kernel/ubuntu/+source/linux/+git/jammy/tree/include/linux/uuid.h?h=Ubuntu-5.15.0-125.135
  • 6.8 Kernel: git.launchpad .net/~ubuntu-kernel/ubuntu/+source/linux/+git/noble/tree/include/linux/uuid.h?h=Ubuntu-6.8.0-38.38

Fix for now is to simply import uapi/linux/uuid.h in places uuid_le is required

Reference:

3. xdp_do_flush_map was removed

Compilation Error

/home/ubuntu/mellanox/mlnx-en-5.8-5.1.1.2-ubuntu22.04-x86_64/src/MLNX_EN_SRC-5.8-5.1.1.2/SOURCES/mlnx-en-5.8/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c:630:17: error
: implicit declaration of function ‘xdp_do_flush_map’; did you mean ‘xdp_do_flush’? [-Werror=implicit-function-declaration]
  630 |                 xdp_do_flush_map();                                          
      |                 ^~~~~~~~~~~~~~~~  
      |                 xdp_do_flush

Fix is to use xdp_do_flush

Reference:

Is there plan for OFED 5.8 to have these changes to support the 6.8 kernel any time in the future?

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Any idea when 24.10 LTS would be released? 24.07 is compatible with 6.8 kernel.