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net: dsa: add bridge member iteration macro

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Drivers that offload bridges need to iterate over the ports that are
members of a given bridge, for example to rebuild per-port forwarding
bitmaps when membership changes. Currently drivers typically open-code
this by combining dsa_switch_for_each_user_port() with a
dsa_port_offloads_bridge_dev() check, or cache bridge membership
within the driver.

Add dsa_switch_for_each_bridge_member() macro to express this pattern
directly, and use it for the existing dsa_bridge_ports() inline
helper.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Link: https://patch.msgid.link/e7136aaa26773f39e805a00fe4ecf13cd2b83fc0.1775049897.git.daniel@makrotopia.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Daniel Golle 2026-04-01 14:34:42 +01:00 committed by Jakub Kicinski
parent b0a79590d1
commit f259e08494
1 changed files with 6 additions and 3 deletions
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9
include/net/dsa.h
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@ -831,15 +831,18 @@ dsa_tree_offloads_bridge_dev(struct dsa_switch_tree *dst,
return false;
}
#define dsa_switch_for_each_bridge_member(_dp, _ds, _bdev) \
dsa_switch_for_each_user_port(_dp, _ds) \
if (dsa_port_offloads_bridge_dev(_dp, _bdev))
static inline u32
dsa_bridge_ports(struct dsa_switch *ds, const struct net_device *bdev)
{
struct dsa_port *dp;
u32 mask = 0;
dsa_switch_for_each_user_port(dp, ds)
if (dsa_port_offloads_bridge_dev(dp, bdev))
mask |= BIT(dp->index);
dsa_switch_for_each_bridge_member(dp, ds, bdev)
mask |= BIT(dp->index);
return mask;
}