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Using a per field mask field, the TC pedit action supports modifying partial fields. E.g if using the TC tool, the following example would make the kernel to only re-write two bytes of the src ip address: tc filter add dev enp1s0 protocol ip parent ffff: prio 30 flower skip_sw ip_proto udp dst_port 8001 action pedit ex munge ip src set 10.1.0.0 retain 0xffff0000 We add driver support for offload these partial re-writes, by setting the per FW action offset-in-field and length-from-offset attributes. The 1st bit set in the mask specifies both the offset and the right shift to apply on the value such that the 1st bit which needs to be set will reside in bit 0 of the FW data field. Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Reviewed-by: Paul Blakey <paulb@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.