xsk: don't allow umem replace at stack level

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Currently drivers have to check if they already have a umem
installed for a given queue and return an error if so.  Make
better use of XDP_QUERY_XSK_UMEM and move this functionality
to the core.

We need to keep rtnl across the calls now.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Acked-by: Björn Töpel <bjorn.topel@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Jakub Kicinski 2018-07-30 20:43:53 -07:00 • committed by David S. Miller

parent f734607e81

commit 84c6b86875

2 changed files with 32 additions and 12 deletions

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7

include/linux/netdevice.h

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37

net/xdp/xdp_umem.c

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