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net: Add notifications when multipath hash field change

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In-kernel notifications are already sent when the multipath hash policy
itself changes, but not when the multipath hash fields change.

Add these notifications, so that interested listeners (e.g., switch ASIC
drivers) could perform the necessary configuration.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ido Schimmel 2021-05-19 15:08:18 +03:00 committed by David S. Miller
parent 340f42f7ff
commit eb0e4d59b6
2 changed files with 34 additions and 2 deletions
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18
net/ipv4/sysctl_net_ipv4.c
View File

@ -465,6 +465,22 @@ static int proc_fib_multipath_hash_policy(struct ctl_table *table, int write,
return ret;
}
static int proc_fib_multipath_hash_fields(struct ctl_table *table, int write,
void *buffer, size_t *lenp,
loff_t *ppos)
{
struct net *net;
int ret;
net = container_of(table->data, struct net,
ipv4.sysctl_fib_multipath_hash_fields);
ret = proc_douintvec_minmax(table, write, buffer, lenp, ppos);
if (write && ret == 0)
call_netevent_notifiers(NETEVENT_IPV4_MPATH_HASH_UPDATE, net);
return ret;
}
#endif
static struct ctl_table ipv4_table[] = {
@ -1061,7 +1077,7 @@ static struct ctl_table ipv4_net_table[] = {
.data = &init_net.ipv4.sysctl_fib_multipath_hash_fields,
.maxlen = sizeof(u32),
.mode = 0644,
.proc_handler = proc_douintvec_minmax,
.proc_handler = proc_fib_multipath_hash_fields,
.extra1 = SYSCTL_ONE,
.extra2 = &fib_multipath_hash_fields_all_mask,
},

18
net/ipv6/sysctl_net_ipv6.c
View File

@ -44,6 +44,22 @@ static int proc_rt6_multipath_hash_policy(struct ctl_table *table, int write,
return ret;
}
static int
proc_rt6_multipath_hash_fields(struct ctl_table *table, int write, void *buffer,
size_t *lenp, loff_t *ppos)
{
struct net *net;
int ret;
net = container_of(table->data, struct net,
ipv6.sysctl.multipath_hash_fields);
ret = proc_douintvec_minmax(table, write, buffer, lenp, ppos);
if (write && ret == 0)
call_netevent_notifiers(NETEVENT_IPV6_MPATH_HASH_UPDATE, net);
return ret;
}
static struct ctl_table ipv6_table_template[] = {
{
.procname = "bindv6only",
@ -160,7 +176,7 @@ static struct ctl_table ipv6_table_template[] = {
.data = &init_net.ipv6.sysctl.multipath_hash_fields,
.maxlen = sizeof(u32),
.mode = 0644,
.proc_handler = proc_douintvec_minmax,
.proc_handler = proc_rt6_multipath_hash_fields,
.extra1 = SYSCTL_ONE,
.extra2 = &rt6_multipath_hash_fields_all_mask,
},