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mqprio: Change handling of hw u8 to allow for multiple hardware offload modes

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This patch is meant to allow for support of multiple hardware offload type
for a single device. There is currently no bounds checking for the hw
member of the mqprio_qopt structure.  This results in us being able to pass
values from 1 to 255 with all being treated the same.  On retreiving the
value it is returned as 1 for anything 1 or greater being set.

With this change we are currently adding limited bounds checking by
defining an enum and using those values to limit the reported hardware
offloads.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexander Duyck
2017-03-15 10:39:18 -07:00
committed by David S. Miller
parent 5b7696499c
commit 2026fecf51
2 changed files with 24 additions and 10 deletions
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8
include/uapi/linux/pkt_sched.h
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@@ -617,6 +617,14 @@ struct tc_drr_stats {
#define TC_QOPT_BITMASK 15
#define TC_QOPT_MAX_QUEUE 16
enum {
TC_MQPRIO_HW_OFFLOAD_NONE, /* no offload requested */
TC_MQPRIO_HW_OFFLOAD_TCS, /* offload TCs, no queue counts */
__TC_MQPRIO_HW_OFFLOAD_MAX
};
#define TC_MQPRIO_HW_OFFLOAD_MAX (__TC_MQPRIO_HW_OFFLOAD_MAX - 1)
struct tc_mqprio_qopt {
__u8 num_tc;
__u8 prio_tc_map[TC_QOPT_BITMASK + 1];