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xsk: discard zero length descriptors in Tx path

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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>
This commit is contained in:
Tirthendu Sarkar 2023-07-19 15:24:06 +02:00 committed by Alexei Starovoitov
parent cf24f5a5fe
commit 07428da9e2
1 changed files with 6 additions and 0 deletions
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6
net/xdp/xsk_queue.h
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@ -140,6 +140,9 @@ static inline bool xp_aligned_validate_desc(struct xsk_buff_pool *pool,
{
u64 offset = desc->addr & (pool->chunk_size - 1);
if (!desc->len)
return false;
if (offset + desc->len > pool->chunk_size)
return false;
@ -156,6 +159,9 @@ static inline bool xp_unaligned_validate_desc(struct xsk_buff_pool *pool,
{
u64 addr = xp_unaligned_add_offset_to_addr(desc->addr);
if (!desc->len)
return false;
if (desc->len > pool->chunk_size)
return false;