From: David Ahern <dsah...@gmail.com> Many commands convert device names to an index using ll_name_to_index. ll_name_to_index calls if_nametoindex which is ioctl based and the result is not cached. When using a batch file this means the same device lookups can be done repeatedly adding unnecessary overhead (socket + ioctl + close for each device lookup).
This series adds a new function, ll_link_get, to send a netlink based RTM_GETLINK. If successful, the result is cached in idx_head and name_head so future lookups can re-use the entry. ll_name_to_index is updated to use ll_link_get over if_nametoindex. The first 2 patches add a means to drop an entry from the cache and updates iplink_modify to use that new function to drop entries on device renames. David Ahern (3): ll_map: Add function to remove link cache entry by index ip link: Drop cache entry on name changes Improve batch times by caching link lookups include/ll_map.h | 1 + ip/ip_common.h | 3 ++- ip/iplink.c | 10 ++++++++-- ip/iplink_vxcan.c | 3 ++- ip/link_veth.c | 3 ++- lib/ll_map.c | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++++++- 6 files changed, 72 insertions(+), 6 deletions(-) -- 2.11.0
