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c0111878d4
Most "production" netlink clients use large buffers to make dump efficient, which means that handling of dump continuation in the kernel is not very well tested. Add an option for debugging / testing handling of dumps. It enables printing of extra netlink-level debug and lowers the recv() buffer size in one go. When used without any argument (--dbg-small-recv) it picks a very small default (4000), explicit size can be set, too (--dbg-small-recv 5000). Example: $ ./cli.py [...] --dbg-small-recv Recv: read 3712 bytes, 29 messages nl_len = 128 (112) nl_flags = 0x0 nl_type = 19 [...] nl_len = 128 (112) nl_flags = 0x0 nl_type = 19 Recv: read 3968 bytes, 31 messages nl_len = 128 (112) nl_flags = 0x0 nl_type = 19 [...] nl_len = 128 (112) nl_flags = 0x0 nl_type = 19 Recv: read 532 bytes, 5 messages nl_len = 128 (112) nl_flags = 0x0 nl_type = 19 [...] nl_len = 128 (112) nl_flags = 0x0 nl_type = 19 nl_len = 20 (4) nl_flags = 0x2 nl_type = 3 (the [...] are edits to shorten the commit message). Note that the first message of the dump is sized conservatively by the kernel. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Reviewed-by: Donald Hunter <donald.hunter@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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.