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page_pool: fix netlink dump stop/resume 

If message fills up we need to stop writing. 'break' will
only get us out of the iteration over pools of a single
netdev, we need to also stop walking netdevs.

This results in either infinite dump, or missing pools,
depending on whether message full happens on the last
netdev (infinite dump) or non-last (missing pools).

Fixes: 950ab53b77 ("net: page_pool: implement GET in the netlink API")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski 2024-02-29 17:13:31 -08:00 committed by David S. Miller
parent 1ca1ba465e
commit 429679dcf7
1 changed files with 2 additions and 1 deletions
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3
net/core/page_pool_user.c
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@ -94,11 +94,12 @@ netdev_nl_page_pool_get_dump(struct sk_buff *skb, struct netlink_callback *cb,
state->pp_id = pool->user.id;
err = fill(skb, pool, info);
if (err)
break;
goto out;
}
state->pp_id = 0;
}
out:
mutex_unlock(&page_pools_lock);
rtnl_unlock();