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ethtool: add compat for devlink info 

If driver did not fill the fw_version field, try to call into
the new devlink get_info op and collect the versions that way.
We assume ethtool was always reporting running versions.

v4:
 - use IS_REACHABLE() to avoid problems with DEVLINK=m (kbuildbot).
v3 (Jiri):
 - do a dump and then parse it instead of special handling;
 - concatenate all versions (well, all that fit :)).

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski 2019-01-31 10:50:47 -08:00 committed by David S. Miller
parent 7c908f467d
commit ddb6e99e2d
3 changed files with 80 additions and 0 deletions
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10
include/net/devlink.h
View File

@ -972,4 +972,14 @@ devlink_info_version_running_put(struct devlink_info_req *req,
}
#endif
#if IS_REACHABLE(CONFIG_NET_DEVLINK)
void devlink_compat_running_version(struct net_device *dev,
char *buf, size_t len);
#else
static inline void
devlink_compat_running_version(struct net_device *dev, char *buf, size_t len)
{
}
#endif
#endif /* _NET_DEVLINK_H_ */

63
net/core/devlink.c
View File

@ -5278,6 +5278,69 @@ unlock:
}
EXPORT_SYMBOL_GPL(devlink_region_snapshot_create);
static void __devlink_compat_running_version(struct devlink *devlink,
char *buf, size_t len)
{
const struct nlattr *nlattr;
struct devlink_info_req req;
struct sk_buff *msg;
int rem, err;
if (!devlink->ops->info_get)
return;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;
req.msg = msg;
err = devlink->ops->info_get(devlink, &req, NULL);
if (err)
goto free_msg;
nla_for_each_attr(nlattr, (void *)msg->data, msg->len, rem) {
const struct nlattr *kv;
int rem_kv;
if (nla_type(nlattr) != DEVLINK_ATTR_INFO_VERSION_RUNNING)
continue;
nla_for_each_nested(kv, nlattr, rem_kv) {
if (nla_type(kv) != DEVLINK_ATTR_INFO_VERSION_VALUE)
continue;
strlcat(buf, nla_data(kv), len);
strlcat(buf, " ", len);
}
}
free_msg:
nlmsg_free(msg);
}
void devlink_compat_running_version(struct net_device *dev,
char *buf, size_t len)
{
struct devlink_port *devlink_port;
struct devlink *devlink;
mutex_lock(&devlink_mutex);
list_for_each_entry(devlink, &devlink_list, list) {
mutex_lock(&devlink->lock);
list_for_each_entry(devlink_port, &devlink->port_list, list) {
if (devlink_port->type == DEVLINK_PORT_TYPE_ETH ||
devlink_port->type_dev == dev) {
__devlink_compat_running_version(devlink,
buf, len);
mutex_unlock(&devlink->lock);
goto out;
}
}
mutex_unlock(&devlink->lock);
}
out:
mutex_unlock(&devlink_mutex);
}
static int __init devlink_module_init(void)
{
return genl_register_family(&devlink_nl_family);

7
net/core/ethtool.c
View File

@ -27,6 +27,7 @@
#include <linux/rtnetlink.h>
#include <linux/sched/signal.h>
#include <linux/net.h>
#include <net/devlink.h>
#include <net/xdp_sock.h>
/*
@ -803,6 +804,12 @@ static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
if (ops->get_eeprom_len)
info.eedump_len = ops->get_eeprom_len(dev);
rtnl_unlock();
if (!info.fw_version[0])
devlink_compat_running_version(dev, info.fw_version,
sizeof(info.fw_version));
rtnl_lock();
if (copy_to_user(useraddr, &info, sizeof(info)))
return -EFAULT;
return 0;