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| author | Petr Machata <petrm@mellanox.com> | 2020-01-06 19:01:56 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-01-08 21:45:53 +0100 |
| commit | 240ce7f6428ff5188b9eedc066e1e4d645b8635f (patch) | |
| tree | 38df958b10b05e5d459aeec5c5bd18e6785d7a61 /net/sched/sch_blackhole.c | |
| parent | mlxsw: spectrum_qdisc: Ignore grafting of invisible FIFO (diff) | |
| download | linux-240ce7f6428ff5188b9eedc066e1e4d645b8635f.tar.xz linux-240ce7f6428ff5188b9eedc066e1e4d645b8635f.zip | |
net: sch_prio: When ungrafting, replace with FIFO
When a child Qdisc is removed from one of the PRIO Qdisc's bands, it is
replaced unconditionally by a NOOP qdisc. As a result, any traffic hitting
that band gets dropped. That is incorrect--no Qdisc was explicitly added
when PRIO was created, and after removal, none should have to be added
either.
Fix PRIO by first attempting to create a default Qdisc and only falling
back to noop when that fails. This pattern of attempting to create an
invisible FIFO, using NOOP only as a fallback, is also seen in other
Qdiscs.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Petr Machata <petrm@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/sch_blackhole.c')
0 files changed, 0 insertions, 0 deletions