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dpif-netdev: Return error code when no mark available.

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The max number of mark is (UINT32_MAX - 1), that is
enough to be used. But theoretically, if there are no
mark available, the later different flows will shared
the mark INVALID_FLOW_MARK, that may break the function.
If there are no available mark to be used, return error
code.

Fixes: 02bb2824e5 ("dpif-netdev: do hw flow offload in a thread")
Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>
This commit is contained in:
Tonghao Zhang
2020-06-09 08:53:41 +08:00
committed by Ilya Maximets
parent 058b80d3de
commit fa31efd211
1 changed files with 1 additions and 0 deletions
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lib/dpif-netdev.c
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@@ -2549,6 +2549,7 @@ dp_netdev_flow_offload_put(struct dp_flow_offload_item *offload)
mark = flow_mark_alloc();
if (mark == INVALID_FLOW_MARK) {
VLOG_ERR("Failed to allocate flow mark!\n");
return -1;
}
}
info.flow_mark = mark;