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| author |   David S. Miller <davem@davemloft.net> | 2019-02-06 17:00:15 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-02-06 17:00:15 -0800 |
| commit | 042a41977b7c49dddad7560ea8697b007fbf33bc (patch) | |
| tree | 44cee956f02c52f9f5fc0f5f3a87a2b5157625e8 /include | |
| parent | Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next (diff) | |
| parent | rds: rdma: update rdma transport for tos (diff) | |
| download | linux-dev-042a41977b7c49dddad7560ea8697b007fbf33bc.tar.xz linux-dev-042a41977b7c49dddad7560ea8697b007fbf33bc.zip | |
Merge branch 'for_net-next-5.1/rds-tos-v4' of git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux
Santosh Shilimkar says:
====================
rds: add tos support
RDS applications make use of tos to classify database traffic.
This feature has been used in shipping products from 2.6.32 based
kernels. Its tied with RDS v4.1 protocol version and the compatibility
gets negotiated as part of connections setup.
Patchset keeps full backward compatibility using existing connection
negotiation scheme. Currently the feature is exploited by RDMA
transport and for TCP transport the user tos values are mapped to
same default class (0).
For RDMA transports, RDMA CM service type API is used to
set up different SL(service lanes) and the IB fabric is configured
for tos mapping using Subnet Manager(SL to VL mappings).
Similarly for ROCE fabric, user priority is mapped with different
DSCP code points which are associated with different switch queues
in the fabric.
The original code was developed by Bang Nguyen in downstream kernel back in
2.6.32 kernel days and it has evolved significantly over period of time.
Thanks to Yanjun for doing testing with various combinations of host like
v3.1<->v4.1, v4.1.<->v3.1, v4.1 upstream to shipping v4.1 etc etc
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/uapi/linux/rds.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/uapi/linux/rds.h b/include/uapi/linux/rds.h index 8b73cb603c5f..5d0f76c780e5 100644 --- a/include/uapi/linux/rds.h +++ b/include/uapi/linux/rds.h @@ -69,6 +69,12 @@ #define RDS_TRANS_COUNT 3 #define RDS_TRANS_NONE (~0) +/* IOCTLS commands for SOL_RDS */ +#define SIOCRDSSETTOS (SIOCPROTOPRIVATE) +#define SIOCRDSGETTOS (SIOCPROTOPRIVATE + 1) + +typedef __u8 rds_tos_t; + /* * Control message types for SOL_RDS. * @@ -149,6 +155,7 @@ struct rds_info_connection { __be32 faddr; __u8 transport[TRANSNAMSIZ]; /* null term ascii */ __u8 flags; + __u8 tos; } __attribute__((packed)); struct rds6_info_connection { @@ -171,6 +178,7 @@ struct rds_info_message { __be16 lport; __be16 fport; __u8 flags; + __u8 tos; } __attribute__((packed)); struct rds6_info_message { @@ -214,6 +222,7 @@ struct rds_info_tcp_socket { __u32 last_sent_nxt; __u32 last_expected_una; __u32 last_seen_una; + __u8 tos; } __attribute__((packed)); struct rds6_info_tcp_socket { @@ -240,6 +249,7 @@ struct rds_info_rdma_connection { __u32 max_send_sge; __u32 rdma_mr_max; __u32 rdma_mr_size; + __u8 tos; }; struct rds6_info_rdma_connection { @@ -253,6 +263,7 @@ struct rds6_info_rdma_connection { __u32 max_send_sge; __u32 rdma_mr_max; __u32 rdma_mr_size; + __u8 tos; }; /* RDS message Receive Path Latency points */ |