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The reason codes are handled in two ways nowadays (quoting Mat Martineau):
1. Sending in the MPTCP option on RST packets when there is no subflow
context available (these use subflow_add_reset_reason() and directly call
a TCP-level send_reset function)
2. The "normal" way via subflow->reset_reason. This will propagate to both
the outgoing reset packet and to a local path manager process via netlink
in mptcp_event_sub_closed()
RFC 8684 defines the skb reset reason behaviour which is not required
even though in some places:
A host sends a TCP RST in order to close a subflow or reject
an attempt to open a subflow (MP_JOIN). In order to let the
receiving host know why a subflow is being closed or rejected,
the TCP RST packet MAY include the MP_TCPRST option (Figure 15).
The host MAY use this information to decide, for example, whether
it tries to re-establish the subflow immediately, later, or never.
Since the commit
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| 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 reStructuredText 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.