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bridge: add template for bridge port flags 

Provide macro to build sysfs data structures and functions
for accessing flag bits.  If flag bits change do netlink
notification.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
stephen hemminger 2012-11-13 07:53:06 +00:00 committed by David S. Miller
parent 25c71c75ac
commit cd7537326e
1 changed files with 23 additions and 15 deletions
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38
net/bridge/br_sysfs_if.c
View File

@ -34,6 +34,28 @@ const struct brport_attribute brport_attr_##_name = { \
.store = _store, \
};
#define BRPORT_ATTR_FLAG(_name, _mask) \
static ssize_t show_##_name(struct net_bridge_port *p, char *buf) \
{ \
return sprintf(buf, "%d\n", !!(p->flags & _mask)); \
} \
static int store_##_name(struct net_bridge_port *p, unsigned long v) \
{ \
unsigned long flags = p->flags; \
if (v) \
flags |= _mask; \
else \
flags &= ~_mask; \
if (flags != p->flags) { \
p->flags = flags; \
br_ifinfo_notify(RTM_NEWLINK, p); \
} \
return 0; \
} \
static BRPORT_ATTR(_name, S_IRUGO | S_IWUSR, \
show_##_name, store_##_name)
static ssize_t show_path_cost(struct net_bridge_port *p, char *buf)
{
return sprintf(buf, "%d\n", p->path_cost);
@ -133,21 +155,7 @@ static int store_flush(struct net_bridge_port *p, unsigned long v)
}
static BRPORT_ATTR(flush, S_IWUSR, NULL, store_flush);
static ssize_t show_hairpin_mode(struct net_bridge_port *p, char *buf)
{
int hairpin_mode = (p->flags & BR_HAIRPIN_MODE) ? 1 : 0;
return sprintf(buf, "%d\n", hairpin_mode);
}
static int store_hairpin_mode(struct net_bridge_port *p, unsigned long v)
{
if (v)
p->flags |= BR_HAIRPIN_MODE;
else
p->flags &= ~BR_HAIRPIN_MODE;
return 0;
}
static BRPORT_ATTR(hairpin_mode, S_IRUGO | S_IWUSR,
show_hairpin_mode, store_hairpin_mode);
BRPORT_ATTR_FLAG(hairpin_mode, BR_HAIRPIN_MODE);
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
static ssize_t show_multicast_router(struct net_bridge_port *p, char *buf)