diff options
Diffstat (limited to 'net/netfilter')
| -rw-r--r-- | net/netfilter/nft_cmp.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/net/netfilter/nft_cmp.c b/net/netfilter/nft_cmp.c index bec22584395f..777f09e4dc60 100644 --- a/net/netfilter/nft_cmp.c +++ b/net/netfilter/nft_cmp.c @@ -197,6 +197,18 @@ static const struct nft_expr_ops nft_cmp_ops = { .offload = nft_cmp_offload, }; +/* Calculate the mask for the nft_cmp_fast expression. On big endian the + * mask needs to include the *upper* bytes when interpreting that data as + * something smaller than the full u32, therefore a cpu_to_le32 is done. + */ +static u32 nft_cmp_fast_mask(unsigned int len) +{ + __le32 mask = cpu_to_le32(~0U >> (sizeof_field(struct nft_cmp_fast_expr, + data) * BITS_PER_BYTE - len)); + + return (__force u32)mask; +} + static int nft_cmp_fast_init(const struct nft_ctx *ctx, const struct nft_expr *expr, const struct nlattr * const tb[]) |