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authorBenoît Ganne <bganne@cisco.com>2022-06-08 10:49:17 +0200
committerDamjan Marion <dmarion@0xa5.net>2022-06-29 21:23:38 +0000
commitb03eec969f3db186fc354c3e885e51c0b24803f0 (patch)
tree54871a6dc00bad0644f75755d616f10ad67de6c2 /src/vnet/l2/l2_in_out_acl.c
parentb0057282d64a4f9ac5966fceb427057b0665b772 (diff)
classify: use 32 bits hash
classify hash used to be stored as u64 in buffer metadata, use 32 bits instead: - on almost all our supported arch (x86 and arm64) we use crc32c intrinsics to compute the final hash: we really get a 32-bits hash - the hash itself is used to compute a 32-bits bucket index by masking upper bits: we always discard the higher 32-bits - this allows to increase the l2 classify buffer metadata padding such as it does not overlap with the ip fib_index metadata anymore. This overlap is an issue when using the 'set metadata' action in the ip ACL node which updates both fields Type: fix Change-Id: I5d35bdae97b96c3cae534e859b63950fb500ff50 Signed-off-by: Benoît Ganne <bganne@cisco.com>
Diffstat (limited to 'src/vnet/l2/l2_in_out_acl.c')
-rw-r--r--src/vnet/l2/l2_in_out_acl.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/vnet/l2/l2_in_out_acl.c b/src/vnet/l2/l2_in_out_acl.c
index f8293c1feee..7307a6802a2 100644
--- a/src/vnet/l2/l2_in_out_acl.c
+++ b/src/vnet/l2/l2_in_out_acl.c
@@ -278,7 +278,7 @@ l2_in_out_acl_node_fn (vlib_main_t * vm,
u32 table_index0;
vnet_classify_table_t *t0;
vnet_classify_entry_t *e0;
- u64 hash0;
+ u32 hash0;
u8 *h0;
u8 error0;
@@ -288,7 +288,7 @@ l2_in_out_acl_node_fn (vlib_main_t * vm,
vlib_buffer_t *p1 = vlib_get_buffer (vm, from[3]);
vnet_classify_table_t *tp1;
u32 table_index1;
- u64 phash1;
+ u32 phash1;
table_index1 = vnet_buffer (p1)->l2_classify.table_index;