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-rw-r--r--tools/lib/bpf/xsk.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/tools/lib/bpf/xsk.c b/tools/lib/bpf/xsk.c
index 5098d9e3b55a..d24b5cc720ec 100644
--- a/tools/lib/bpf/xsk.c
+++ b/tools/lib/bpf/xsk.c
@@ -59,6 +59,8 @@ struct xsk_umem {
int fd;
int refcount;
struct list_head ctx_list;
+ bool rx_ring_setup_done;
+ bool tx_ring_setup_done;
};
struct xsk_ctx {
@@ -857,6 +859,7 @@ int xsk_socket__create_shared(struct xsk_socket **xsk_ptr,
struct xsk_ctx *ctx;
int err, ifindex;
bool unmap = umem->fill_save != fill;
+ bool rx_setup_done = false, tx_setup_done = false;
if (!umem || !xsk_ptr || !(rx || tx))
return -EFAULT;
@@ -884,6 +887,8 @@ int xsk_socket__create_shared(struct xsk_socket **xsk_ptr,
}
} else {
xsk->fd = umem->fd;
+ rx_setup_done = umem->rx_ring_setup_done;
+ tx_setup_done = umem->tx_ring_setup_done;
}
ctx = xsk_get_ctx(umem, ifindex, queue_id);
@@ -902,7 +907,7 @@ int xsk_socket__create_shared(struct xsk_socket **xsk_ptr,
}
xsk->ctx = ctx;
- if (rx) {
+ if (rx && !rx_setup_done) {
err = setsockopt(xsk->fd, SOL_XDP, XDP_RX_RING,
&xsk->config.rx_size,
sizeof(xsk->config.rx_size));
@@ -910,8 +915,10 @@ int xsk_socket__create_shared(struct xsk_socket **xsk_ptr,
err = -errno;
goto out_put_ctx;
}
+ if (xsk->fd == umem->fd)
+ umem->rx_ring_setup_done = true;
}
- if (tx) {
+ if (tx && !tx_setup_done) {
err = setsockopt(xsk->fd, SOL_XDP, XDP_TX_RING,
&xsk->config.tx_size,
sizeof(xsk->config.tx_size));
@@ -919,6 +926,8 @@ int xsk_socket__create_shared(struct xsk_socket **xsk_ptr,
err = -errno;
goto out_put_ctx;
}
+ if (xsk->fd == umem->fd)
+ umem->rx_ring_setup_done = true;
}
err = xsk_get_mmap_offsets(xsk->fd, &off);