net/mlx5e: Attach/detach XDP program safely

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When an XDP program is set, a full reopen of all channels happens in two
cases:

1. When there was no program set, and a new one is being set.

2. When there was a program set, but it's being unset.

The full reopen is necessary, because the channel parameters may change
if XDP is enabled or disabled. However, it's performed in an unsafe way:
if the new channels fail to open, the old ones are already closed, and
the interface goes down. Use the safe way to switch channels instead.
The same way is already used for other configuration changes.

Signed-off-by: Maxim Mikityanskiy <maximmi@mellanox.com>
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

...

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Maxim Mikityanskiy 2019-06-26 17:35:23 +03:00 • committed by Daniel Borkmann

parent e5c891a349

commit e18953240d

1 changed files with 20 additions and 11 deletions

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drivers/net/ethernet/mellanox/mlx5/core/en_main.c

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