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devlink: have genetlink code to parse the attrs during dumpit

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Benefit from the fact that the generic netlink code can parse the attrs
for dumpit op and avoid need to parse it in the op callback.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko 2019-10-05 20:04:42 +02:00 committed by David S. Miller
parent 265ecd4fa3
commit ee85da535f
1 changed files with 6 additions and 32 deletions
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38
net/core/devlink.c
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@ -3943,29 +3943,19 @@ static int devlink_nl_region_read_snapshot_fill(struct sk_buff *skb,
static int devlink_nl_cmd_region_read_dumpit(struct sk_buff *skb,
struct netlink_callback *cb)
{
const struct genl_dumpit_info *info = genl_dumpit_info(cb);
u64 ret_offset, start_offset, end_offset = 0;
struct nlattr **attrs = info->attrs;
struct devlink_region *region;
struct nlattr *chunks_attr;
const char *region_name;
struct devlink *devlink;
struct nlattr **attrs;
bool dump = true;
void *hdr;
int err;
start_offset = *((u64 *)&cb->args[0]);
attrs = kmalloc_array(DEVLINK_ATTR_MAX + 1, sizeof(*attrs), GFP_KERNEL);
if (!attrs)
return -ENOMEM;
err = nlmsg_parse_deprecated(cb->nlh,
GENL_HDRLEN + devlink_nl_family.hdrsize,
attrs, DEVLINK_ATTR_MAX,
devlink_nl_family.policy, cb->extack);
if (err)
goto out_free;
mutex_lock(&devlink_mutex);
devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs);
if (IS_ERR(devlink)) {
@ -4042,7 +4032,6 @@ static int devlink_nl_cmd_region_read_dumpit(struct sk_buff *skb,
genlmsg_end(skb, hdr);
mutex_unlock(&devlink->lock);
mutex_unlock(&devlink_mutex);
kfree(attrs);
return skb->len;
@ -4052,8 +4041,6 @@ out_unlock:
mutex_unlock(&devlink->lock);
out_dev:
mutex_unlock(&devlink_mutex);
out_free:
kfree(attrs);
return err;
}
@ -4995,21 +4982,10 @@ devlink_health_reporter_get_from_info(struct devlink *devlink,
static struct devlink_health_reporter *
devlink_health_reporter_get_from_cb(struct netlink_callback *cb)
{
const struct genl_dumpit_info *info = genl_dumpit_info(cb);
struct devlink_health_reporter *reporter;
struct nlattr **attrs = info->attrs;
struct devlink *devlink;
struct nlattr **attrs;
int err;
attrs = kmalloc_array(DEVLINK_ATTR_MAX + 1, sizeof(*attrs), GFP_KERNEL);
if (!attrs)
return NULL;
err = nlmsg_parse_deprecated(cb->nlh,
GENL_HDRLEN + devlink_nl_family.hdrsize,
attrs, DEVLINK_ATTR_MAX,
devlink_nl_family.policy, cb->extack);
if (err)
goto free;
mutex_lock(&devlink_mutex);
devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs);
@ -5018,12 +4994,9 @@ devlink_health_reporter_get_from_cb(struct netlink_callback *cb)
reporter = devlink_health_reporter_get_from_attrs(devlink, attrs);
mutex_unlock(&devlink_mutex);
kfree(attrs);
return reporter;
unlock:
mutex_unlock(&devlink_mutex);
free:
kfree(attrs);
return NULL;
}
@ -6154,7 +6127,8 @@ static const struct genl_ops devlink_nl_ops[] = {
},
{
.cmd = DEVLINK_CMD_REGION_READ,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.validate = GENL_DONT_VALIDATE_STRICT |
GENL_DONT_VALIDATE_DUMP_STRICT,
.dumpit = devlink_nl_cmd_region_read_dumpit,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,