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In Tx path, xsk core reserves space for each desc to be transmitted in the completion queue and it's address contained in it is stored in the skb destructor arg. After successful transmission the skb destructor submits the addr marking completion. To handle multiple descriptors per packet, now along with reserving space for each descriptor, the corresponding address is also stored in completion queue. The number of pending descriptors are stored in skb destructor arg and is used by the skb destructor to update completions. Introduce 'skb' in xdp_sock to store a partially built packet when __xsk_generic_xmit() must return before it sees the EOP descriptor for the current packet so that packet building can resume in next call of __xsk_generic_xmit(). Helper functions are introduced to set and get the pending descriptors in the skb destructor arg. Also, wrappers are introduced for storing descriptor addresses, submitting and cancelling (for unsuccessful transmissions) the number of completions. Signed-off-by: Tirthendu Sarkar <tirthendu.sarkar@intel.com> Link: https://lore.kernel.org/r/20230719132421.584801-7-maciej.fijalkowski@intel.com Signed-off-by: Alexei Starovoitov <ast@kernel.org> |
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| .. | ||
| Kconfig | ||
| Makefile | ||
| xdp_umem.c | ||
| xdp_umem.h | ||
| xsk_buff_pool.c | ||
| xsk_diag.c | ||
| xsk_queue.c | ||
| xsk_queue.h | ||
| xsk.c | ||
| xsk.h | ||
| xskmap.c | ||