mirror of
https://github.com/torvalds/linux.git
synced 2026-10-15 12:19:02 +02:00
Linux kernel source tree
ff0f638329
Ido Schimmel says: ==================== devlink: Add support for control packet traps So far device drivers were only able to register drop and exception packet traps with devlink. These traps are used for packets that were either dropped by the underlying device or encountered an exception (e.g., missing neighbour entry) during forwarding. However, in the steady state, the majority of the packets being trapped to the CPU are packets that are required for the correct functioning of the control plane. For example, ARP request and IGMP query packets. This patch set allows device drivers to register such control traps with devlink and expose their default control plane policy to user space. User space can then tune the packet trap policer settings according to its needs, as with existing packet traps. In a similar fashion to exception traps, the action associated with such traps cannot be changed as it can easily break the control plane. Unlike drop and exception traps, packets trapped via control traps are not reported to the kernel's drop monitor as they are not indicative of any problem. Patch set overview: Patches #1-#3 break out layer 3 exceptions to a different group to provide better granularity. A future patch set will make this completely configurable. Patch #4 adds a new trap action ('mirror') that is used for packets that are forwarded by the device and sent to the CPU. Such packets are marked by device drivers with 'skb->offload_fwd_mark = 1' in order to prevent the kernel from forwarding them again. Patch #5 adds the new trap type, 'control'. Patches #6-#8 gradually add various control traps to devlink with proper documentation. Patch #9 adds a few control traps to netdevsim, which are automatically exercised by existing devlink-trap selftest. Patches #10 performs small refactoring in mlxsw. Patches #11-#13 change mlxsw to register its existing control traps with devlink. Patch #14 adds a selftest over mlxsw that exercises all the registered control traps. ==================== Signed-off-by: David S. Miller <davem@davemloft.net> |
||
|---|---|---|
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
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.