When we test idiag on 3.4 kernel, we always get ERANGE.
This is because libnl has its own copy for SK_MEMINFO_*,
which is actually newer than 3.4, where SK_MEMINFO_VARS
is larger than kernel's.
We add a copy from latest kernel, so on older kernel
libnl should still compile. Note, for kernel < 3.6
we don't have SK_MEMINFO_BACKLOG, we have to relax
the minlen.
'sock_diag.h' comes from v3.17 kernel sources
(bfe01a5ba2490f299e1d2d5508cbbbadd897bbe9), file
'include/uapi/linux/sock_diag.h'.
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: Thomas Haller <thaller@redhat.com>
Without ->oo_keygen, libnl will use linear search
for cache objects. This is extremely slow for idiag
when we have a lot of TCP connections. Provide a
hash function for idiag so that libnl will be able
to lookup a hashtable.
http://lists.infradead.org/pipermail/libnl/2014-November/001715.html
Cc: Thomas Graf <tgraf@suug.ch>
Cc: Thomas Haller <thaller@redhat.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Thomas Haller <thaller@redhat.com>
- Inet diag allows users to gather low-level socket information.
- This library provides a higher-level API for creating inetdiag requests (via
idiagnl_connect and idiagnl_send_simple) and parsing the replies (via
idiagnl_msg_parse). A cache is also provided (via idiagnl_msg_alloc_cache).
- Request and message objects provide APIs for accessing and setting the
various properties of each.
- This library also allows the user to parse the inetdiag response attributes
which contain information about traffic class, TOS, congestion, socket
memory info, and more depending on the kernel version used.
- Includes doxygen documentation.
