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net: rtnetlink: add linkxstats callbacks and attribute

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Add callbacks to calculate the size and fill link extended statistics
which can be split into multiple messages and are dumped via the new
rtnl stats API (RTM_GETSTATS) with the IFLA_STATS_LINK_XSTATS attribute.
Also add that attribute to the idx mask check since it is expected to
be able to save state and resume dumping (e.g. future bridge per-vlan
stats will be dumped via this attribute and callbacks).
Each link type should nest its private attributes under the per-link type
attribute. This allows to have any number of separated private attributes
and to avoid one call to get the dev link type.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nikolay Aleksandrov 2016-04-30 10:25:27 +02:00 • committed by David S. Miller
parent e8872a25a0
commit 97a47facf3
3 changed files with 49 additions and 0 deletions
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12
include/uapi/linux/if_link.h
View file

@ -810,6 +810,7 @@ struct if_stats_msg {
enum {
IFLA_STATS_UNSPEC, /* also used as 64bit pad attribute */
IFLA_STATS_LINK_64,
IFLA_STATS_LINK_XSTATS,
__IFLA_STATS_MAX,
};
@ -817,4 +818,15 @@ enum {
#define IFLA_STATS_FILTER_BIT(ATTR) (1 << (ATTR - 1))
/* These are embedded into IFLA_STATS_LINK_XSTATS:
* [IFLA_STATS_LINK_XSTATS]
* -> [LINK_XSTATS_TYPE_xxx]
* -> [rtnl link type specific attributes]
*/
enum {
LINK_XSTATS_TYPE_UNSPEC,
__LINK_XSTATS_TYPE_MAX
};
#define LINK_XSTATS_TYPE_MAX (__LINK_XSTATS_TYPE_MAX - 1)
#endif /* _UAPI_LINUX_IF_LINK_H */