diff options
Diffstat (limited to 'tools/lib/bpf/xsk.c')
| -rw-r--r-- | tools/lib/bpf/xsk.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/tools/lib/bpf/xsk.c b/tools/lib/bpf/xsk.c index 9807903f121e..f7f4efb70a4c 100644 --- a/tools/lib/bpf/xsk.c +++ b/tools/lib/bpf/xsk.c @@ -280,7 +280,11 @@ int xsk_umem__create_v0_0_4(struct xsk_umem **umem_ptr, void *umem_area, fill->consumer = map + off.fr.consumer; fill->flags = map + off.fr.flags; fill->ring = map + off.fr.desc; - fill->cached_cons = umem->config.fill_size; + fill->cached_prod = *fill->producer; + /* cached_cons is "size" bigger than the real consumer pointer + * See xsk_prod_nb_free + */ + fill->cached_cons = *fill->consumer + umem->config.fill_size; map = mmap(NULL, off.cr.desc + umem->config.comp_size * sizeof(__u64), PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE, umem->fd, @@ -297,6 +301,8 @@ int xsk_umem__create_v0_0_4(struct xsk_umem **umem_ptr, void *umem_area, comp->consumer = map + off.cr.consumer; comp->flags = map + off.cr.flags; comp->ring = map + off.cr.desc; + comp->cached_prod = *comp->producer; + comp->cached_cons = *comp->consumer; *umem_ptr = umem; return 0; @@ -672,6 +678,8 @@ int xsk_socket__create(struct xsk_socket **xsk_ptr, const char *ifname, rx->consumer = rx_map + off.rx.consumer; rx->flags = rx_map + off.rx.flags; rx->ring = rx_map + off.rx.desc; + rx->cached_prod = *rx->producer; + rx->cached_cons = *rx->consumer; } xsk->rx = rx; @@ -691,7 +699,11 @@ int xsk_socket__create(struct xsk_socket **xsk_ptr, const char *ifname, tx->consumer = tx_map + off.tx.consumer; tx->flags = tx_map + off.tx.flags; tx->ring = tx_map + off.tx.desc; - tx->cached_cons = xsk->config.tx_size; + tx->cached_prod = *tx->producer; + /* cached_cons is r->size bigger than the real consumer pointer + * See xsk_prod_nb_free + */ + tx->cached_cons = *tx->consumer + xsk->config.tx_size; } xsk->tx = tx; |