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xsk: discard zero length descriptors in Tx path
Descriptors with zero length are not supported by many NICs. To preserve uniform behavior discard any zero length desc as invvalid desc. Signed-off-by: Tirthendu Sarkar <tirthendu.sarkar@intel.com> Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com> Link: https://lore.kernel.org/r/20230719132421.584801-10-maciej.fijalkowski@intel.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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@ -140,6 +140,9 @@ static inline bool xp_aligned_validate_desc(struct xsk_buff_pool *pool,
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{
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u64 offset = desc->addr & (pool->chunk_size - 1);
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if (!desc->len)
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return false;
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if (offset + desc->len > pool->chunk_size)
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return false;
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@ -156,6 +159,9 @@ static inline bool xp_unaligned_validate_desc(struct xsk_buff_pool *pool,
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{
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u64 addr = xp_unaligned_add_offset_to_addr(desc->addr);
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if (!desc->len)
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return false;
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if (desc->len > pool->chunk_size)
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return false;
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