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switchdev: add netlink flags to IPv4 FIB add op 

Pass in the netlink flags (NLM_F_*) into switchdev driver for IPv4 FIB add op
to allow driver to 1) optimize hardware updates, 2) handle ip route prepend
and append commands correctly.

Suggested-by: Jamal Hadi Salim <jhs@mojatatu.com>
Suggested-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: Scott Feldman <sfeldma@gmail.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Acked-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Scott Feldman 2015-03-09 13:59:09 -07:00 committed by David S. Miller
parent bf0b211256
commit f8f2147150
5 changed files with 17 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/net/ethernet/rocker/rocker.c
View File

@ -4152,7 +4152,8 @@ static int rocker_port_switch_port_stp_update(struct net_device *dev, u8 state)
static int rocker_port_switch_fib_ipv4_add(struct net_device *dev,
__be32 dst, int dst_len,
struct fib_info *fi,
u8 tos, u8 type, u32 tb_id)
u8 tos, u8 type,
u32 nlflags, u32 tb_id)
{
struct rocker_port *rocker_port = netdev_priv(dev);
int flags = 0;

3
include/linux/netdevice.h
View File

@ -1035,7 +1035,7 @@ struct fib_info;
* state change.
* int (*ndo_sw_parent_fib_ipv4_add)(struct net_device *dev, __be32 dst,
* int dst_len, struct fib_info *fi,
* u8 tos, u8 type, u32 tb_id);
* u8 tos, u8 type, u32 nlflags, u32 tb_id);
* Called to add/modify IPv4 route to switch device.
* int (*ndo_sw_parent_fib_ipv4_del)(struct net_device *dev, __be32 dst,
* int dst_len, struct fib_info *fi,
@ -1207,6 +1207,7 @@ struct net_device_ops {
int dst_len,
struct fib_info *fi,
u8 tos, u8 type,
u32 nlflags,
u32 tb_id);
int (*ndo_switch_fib_ipv4_del)(struct net_device *dev,
__be32 dst,

6
include/net/switchdev.h
View File

@ -1,6 +1,7 @@
/*
* include/net/switchdev.h - Switch device API
* Copyright (c) 2014 Jiri Pirko <jiri@resnulli.us>
* Copyright (c) 2014-2015 Scott Feldman <sfeldma@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@ -52,7 +53,7 @@ int ndo_dflt_netdev_switch_port_bridge_dellink(struct net_device *dev,
int ndo_dflt_netdev_switch_port_bridge_setlink(struct net_device *dev,
struct nlmsghdr *nlh, u16 flags);
int netdev_switch_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi,
u8 tos, u8 type, u32 tb_id);
u8 tos, u8 type, u32 nlflags, u32 tb_id);
int netdev_switch_fib_ipv4_del(u32 dst, int dst_len, struct fib_info *fi,
u8 tos, u8 type, u32 tb_id);
void netdev_switch_fib_ipv4_abort(struct fib_info *fi);
@ -117,7 +118,8 @@ static inline int ndo_dflt_netdev_switch_port_bridge_setlink(struct net_device *
static inline int netdev_switch_fib_ipv4_add(u32 dst, int dst_len,
struct fib_info *fi,
u8 tos, u8 type, u32 tb_id)
u8 tos, u8 type,
u32 nlflags, u32 tb_id)
{
return 0;
}

5
net/ipv4/fib_trie.c
View File

@ -1155,6 +1155,7 @@ int fib_table_insert(struct fib_table *tb, struct fib_config *cfg)
err = netdev_switch_fib_ipv4_add(key, plen, fi,
new_fa->fa_tos,
cfg->fc_type,
cfg->fc_nlflags,
tb->tb_id);
if (err) {
netdev_switch_fib_ipv4_abort(fi);
@ -1201,7 +1202,9 @@ int fib_table_insert(struct fib_table *tb, struct fib_config *cfg)
/* (Optionally) offload fib entry to switch hardware. */
err = netdev_switch_fib_ipv4_add(key, plen, fi, tos,
cfg->fc_type, tb->tb_id);
cfg->fc_type,
cfg->fc_nlflags,
tb->tb_id);
if (err) {
netdev_switch_fib_ipv4_abort(fi);
goto out_free_new_fa;

7
net/switchdev/switchdev.c
View File

@ -1,6 +1,7 @@
/*
* net/switchdev/switchdev.c - Switch device API
* Copyright (c) 2014 Jiri Pirko <jiri@resnulli.us>
* Copyright (c) 2014-2015 Scott Feldman <sfeldma@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@ -294,12 +295,13 @@ static struct net_device *netdev_switch_get_dev_by_nhs(struct fib_info *fi)
* @fi: route FIB info structure
* @tos: route TOS
* @type: route type
* @nlflags: netlink flags passed in (NLM_F_*)
* @tb_id: route table ID
*
* Add IPv4 route entry to switch device.
*/
int netdev_switch_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi,
u8 tos, u8 type, u32 tb_id)
u8 tos, u8 type, u32 nlflags, u32 tb_id)
{
struct net_device *dev;
const struct net_device_ops *ops;
@ -324,7 +326,8 @@ int netdev_switch_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi,
if (ops->ndo_switch_fib_ipv4_add) {
err = ops->ndo_switch_fib_ipv4_add(dev, htonl(dst), dst_len,
fi, tos, type, tb_id);
fi, tos, type, nlflags,
tb_id);
if (!err)
fi->fib_flags |= RTNH_F_EXTERNAL;
}