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Qevents are attach points for TC blocks, where filters can be put that are executed when "interesting events" take place in a qdisc. The data to keep and the functions to invoke to maintain a qevent will be largely the same between qevents. Therefore introduce sched-wide helpers for qevent management. Currently, similarly to ingress and egress blocks of clsact pseudo-qdisc, blocks attachment cannot be changed after the qdisc is created. To that end, add a helper tcf_qevent_validate_change(), which verifies whether block index attribute is not attached, or if it is, whether its value matches the current one (i.e. there is no material change). The function tcf_qevent_handle() should be invoked when qdisc hits the "interesting event" corresponding to a block. This function releases root lock for the duration of executing the attached filters, to allow packets generated through user actions (notably mirred) to be reinserted to the same qdisc tree. Signed-off-by: Petr Machata <petrm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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| 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.