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During resolving address process, during route lookup and while performing src address translation in case of loopback mode, hold the rcu lock so that if netdevice is moving to different net namespace, or being unregistered, it can be synchronized with net/core/dev.c, ie change_net_namespace() ->dev_close_many() ->rt6_uncached_list_flush_dev() who would change dst->dev to loopback device of the given net namespace. Therefore, hold the rcu lock and sync with synchronize_net() of change_net_namespace() to ensure that netdevice cannot get freed while dst->dev is being used. Signed-off-by: Parav Pandit <parav@mellanox.com> Reviewed-by: Daniel Jurgens <danielj@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com> |
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| 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.
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.