diff options
| author | Björn Töpel <bjorn.topel@intel.com> | 2019-12-19 07:10:05 +0100 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2019-12-19 21:09:43 -0800 |
| commit | 332f22a60e4c3492d4953cd6f7aaa4e8bd0bba97 (patch) | |
| tree | 10a498f29010e5fcb2480100956a7128c18d3556 /net | |
| parent | cdfafe98cabefeedbbc65af5c191c59745c03298 (diff) | |
xdp: Remove map_to_flush and map swap detection
Now that all XDP maps that can be used with bpf_redirect_map() tracks
entries to be flushed in a global fashion, there is not need to track
that the map has changed and flush from xdp_do_generic_map()
anymore. All entries will be flushed in xdp_do_flush_map().
This means that the map_to_flush can be removed, and the corresponding
checks. Moving the flush logic to one place, xdp_do_flush_map(), give
a bulking behavior and performance boost.
Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Toke Høiland-Jørgensen <toke@redhat.com>
Link: https://lore.kernel.org/bpf/20191219061006.21980-8-bjorn.topel@gmail.com
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/filter.c | 27 |
1 files changed, 3 insertions, 24 deletions
diff --git a/net/core/filter.c b/net/core/filter.c index c706325b3e66..d9caa3e57ea1 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -3547,26 +3547,9 @@ static int __bpf_tx_xdp_map(struct net_device *dev_rx, void *fwd, void xdp_do_flush_map(void) { - struct bpf_redirect_info *ri = this_cpu_ptr(&bpf_redirect_info); - struct bpf_map *map = ri->map_to_flush; - - ri->map_to_flush = NULL; - if (map) { - switch (map->map_type) { - case BPF_MAP_TYPE_DEVMAP: - case BPF_MAP_TYPE_DEVMAP_HASH: - __dev_map_flush(); - break; - case BPF_MAP_TYPE_CPUMAP: - __cpu_map_flush(); - break; - case BPF_MAP_TYPE_XSKMAP: - __xsk_map_flush(); - break; - default: - break; - } - } + __dev_map_flush(); + __cpu_map_flush(); + __xsk_map_flush(); } EXPORT_SYMBOL_GPL(xdp_do_flush_map); @@ -3615,14 +3598,10 @@ static int xdp_do_redirect_map(struct net_device *dev, struct xdp_buff *xdp, ri->tgt_value = NULL; WRITE_ONCE(ri->map, NULL); - if (ri->map_to_flush && unlikely(ri->map_to_flush != map)) - xdp_do_flush_map(); - err = __bpf_tx_xdp_map(dev, fwd, map, xdp); if (unlikely(err)) goto err; - ri->map_to_flush = map; _trace_xdp_redirect_map(dev, xdp_prog, fwd, map, index); return 0; err: |