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io_uring/zcrx: resolve netdev before area creation 

Some area types will require a valid struct device to be created, so
resolve netdev and struct device before creating an area.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/ac8c1482be22acfe9ca788d2c3ce31b7451ce488.1746097431.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
pull/1250/head
Pavel Begunkov 2025-05-01 13:17:15 +01:00 committed by Jens Axboe
parent d760d3f59f
commit 6c9589aa08
1 changed files with 15 additions and 14 deletions
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29
io_uring/zcrx.c
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@ -395,6 +395,7 @@ int io_register_zcrx_ifq(struct io_ring_ctx *ctx,
ifq = io_zcrx_ifq_alloc(ctx);
if (!ifq)
return -ENOMEM;
ifq->rq_entries = reg.rq_entries;
scoped_guard(mutex, &ctx->mmap_lock) {
/* preallocate id */
@ -407,24 +408,24 @@ int io_register_zcrx_ifq(struct io_ring_ctx *ctx,
if (ret)
goto err;
ifq->netdev = netdev_get_by_index(current->nsproxy->net_ns, reg.if_idx,
&ifq->netdev_tracker, GFP_KERNEL);
if (!ifq->netdev) {
ret = -ENODEV;
goto err;
}
ifq->dev = ifq->netdev->dev.parent;
if (!ifq->dev) {
ret = -EOPNOTSUPP;
goto err;
}
get_device(ifq->dev);
ret = io_zcrx_create_area(ifq, &ifq->area, &area);
if (ret)
goto err;
ifq->rq_entries = reg.rq_entries;
ret = -ENODEV;
ifq->netdev = netdev_get_by_index(current->nsproxy->net_ns, reg.if_idx,
&ifq->netdev_tracker, GFP_KERNEL);
if (!ifq->netdev)
goto err;
ifq->dev = ifq->netdev->dev.parent;
ret = -EOPNOTSUPP;
if (!ifq->dev)
goto err;
get_device(ifq->dev);
mp_param.mp_ops = &io_uring_pp_zc_ops;
mp_param.mp_priv = ifq;
ret = net_mp_open_rxq(ifq->netdev, reg.if_rxq, &mp_param);