Many commonly used functions like getifaddrs() invoke RTM_GETLINK to dump the interface information, and do not need the the AF_INET6 statististics that are always returned by default from rtnl_fill_ifinfo(). Computing the statistics can be an expensive operation that impacts scaling, so it is desirable to avoid this if the information is not needed. This patch adds a the RTEXT_FILTER_SKIP_STATS extended info flag that can be passed with netlink_request() to avoid statistics computation for the ifinfo path.
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| @@ -667,6 +667,7 @@ struct tcamsg { · 666 unmodified lines | ||
| 667 | 667 | #define RTEXT_FILTER_VF (1 << 0) |
| 668 | 668 | #define RTEXT_FILTER_BRVLAN (1 << 1) |
| 669 | 669 | #define RTEXT_FILTER_BRVLAN_COMPRESSED (1 << 2) |
| 670 | +#define RTEXT_FILTER_SKIP_STATS (1 << 3) | |
| 670 | 671 | |
| 671 | 672 | /* End of information exported to user level */ |
| 672 | 673 | |