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swconfig: add SWITCH_TYPE_LINK and support sending link info to user space

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So far we were sending link data as a string. It got some drawbacks:
1) Didn't allow writing clean user space apps reading link state. It was
   needed to do some screen scraping.
2) Forced whole PORT_LINK communication to be string based. Adding
   support for *setting* port link required passing string and parting
   it in the kernel space.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>

SVN-Revision: 47997
This commit is contained in:
John Crispin 2015-12-23 19:24:30 +00:00
parent c01ca020ea
commit 67e10d757f
3 changed files with 74 additions and 0 deletions
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56
target/linux/generic/files/drivers/net/phy/swconfig.c
View File

@ -770,6 +770,53 @@ done:
return err;
}
static int
swconfig_send_link(struct sk_buff *msg, struct genl_info *info, int attr,
const struct switch_port_link *link)
{
struct nlattr *p = NULL;
int err = 0;
p = nla_nest_start(msg, attr);
if (link->link) {
if (nla_put_flag(msg, SWITCH_LINK_FLAG_LINK))
goto nla_put_failure;
}
if (link->duplex) {
if (nla_put_flag(msg, SWITCH_LINK_FLAG_DUPLEX))
goto nla_put_failure;
}
if (link->aneg) {
if (nla_put_flag(msg, SWITCH_LINK_FLAG_ANEG))
goto nla_put_failure;
}
if (link->tx_flow) {
if (nla_put_flag(msg, SWITCH_LINK_FLAG_TX_FLOW))
goto nla_put_failure;
}
if (link->rx_flow) {
if (nla_put_flag(msg, SWITCH_LINK_FLAG_RX_FLOW))
goto nla_put_failure;
}
if (nla_put_u32(msg, SWITCH_LINK_SPEED, link->speed))
goto nla_put_failure;
if (link->eee & ADVERTISED_100baseT_Full) {
if (nla_put_flag(msg, SWITCH_LINK_FLAG_EEE_100BASET))
goto nla_put_failure;
}
if (link->eee & ADVERTISED_1000baseT_Full) {
if (nla_put_flag(msg, SWITCH_LINK_FLAG_EEE_1000BASET))
goto nla_put_failure;
}
nla_nest_end(msg, p);
return err;
nla_put_failure:
nla_nest_cancel(msg, p);
return -1;
}
static int
swconfig_get_attr(struct sk_buff *skb, struct genl_info *info)
{
@ -794,6 +841,9 @@ swconfig_get_attr(struct sk_buff *skb, struct genl_info *info)
val.value.ports = dev->portbuf;
memset(dev->portbuf, 0,
sizeof(struct switch_port) * dev->ports);
} else if (attr->type == SWITCH_TYPE_LINK) {
val.value.link = &dev->linkbuf;
memset(&dev->linkbuf, 0, sizeof(struct switch_port_link));
}
err = attr->get(dev, attr, &val);
@ -824,6 +874,12 @@ swconfig_get_attr(struct sk_buff *skb, struct genl_info *info)
if (err < 0)
goto nla_put_failure;
break;
case SWITCH_TYPE_LINK:
err = swconfig_send_link(msg, info,
SWITCH_ATTR_OP_VALUE_LINK, val.value.link);
if (err < 0)
goto nla_put_failure;
break;
default:
pr_debug("invalid type in attribute\n");
err = -EINVAL;

2
target/linux/generic/files/include/linux/switch.h
View File

@ -122,6 +122,7 @@ struct switch_dev {
struct mutex sw_mutex;
struct switch_port *portbuf;
struct switch_portmap *portmap;
struct switch_port_link linkbuf;
char buf[128];
@ -148,6 +149,7 @@ struct switch_val {
const char *s;
u32 i;
struct switch_port *ports;
struct switch_port_link *link;
} value;
};

16
target/linux/generic/files/include/uapi/linux/switch.h
View File

@ -50,6 +50,7 @@ enum {
SWITCH_ATTR_OP_VALUE_INT,
SWITCH_ATTR_OP_VALUE_STR,
SWITCH_ATTR_OP_VALUE_PORTS,
SWITCH_ATTR_OP_VALUE_LINK,
SWITCH_ATTR_OP_DESCRIPTION,
/* port lists */
SWITCH_ATTR_PORT,
@ -86,6 +87,7 @@ enum switch_val_type {
SWITCH_TYPE_INT,
SWITCH_TYPE_STRING,
SWITCH_TYPE_PORTS,
SWITCH_TYPE_LINK,
SWITCH_TYPE_NOVAL,
};
@ -97,6 +99,20 @@ enum {
SWITCH_PORT_ATTR_MAX
};
/* link nested attributes */
enum {
SWITCH_LINK_UNSPEC,
SWITCH_LINK_FLAG_LINK,
SWITCH_LINK_FLAG_DUPLEX,
SWITCH_LINK_FLAG_ANEG,
SWITCH_LINK_FLAG_TX_FLOW,
SWITCH_LINK_FLAG_RX_FLOW,
SWITCH_LINK_SPEED,
SWITCH_LINK_FLAG_EEE_100BASET,
SWITCH_LINK_FLAG_EEE_1000BASET,
SWITCH_LINK_ATTR_MAX,
};
#define SWITCH_ATTR_DEFAULTS_OFFSET 0x1000