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18731fe01d
Guillaume Nault says: ==================== ipv4: Remove RTO_ONLINK from udp, ping and raw sockets. udp_sendmsg(), ping_v4_sendmsg() and raw_sendmsg() use similar patterns for restricting their route lookup to on-link hosts. Although they use slightly different code, they all use RTO_ONLINK to override the least significant bit of their tos value. RTO_ONLINK is used to restrict the route scope even when the scope is set to RT_SCOPE_UNIVERSE. Therefore it isn't necessary: we can properly set the scope to RT_SCOPE_LINK instead. Removing RTO_ONLINK will allow to convert .flowi4_tos to dscp_t in the future, thus allowing to properly separate the DSCP from the ECN bits in the networking stack. This patch series defines a common helper to figure out what's the scope of the route lookup. This unifies the way udp, ping and raw sockets get their routing scope and removes their dependency on RTO_ONLINK. ==================== Signed-off-by: David S. Miller <davem@davemloft.net> |
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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.