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Merge branch 'devlink-region-read-fixes'

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Parav Pandit says:

====================
devlink: 2 fixes for devlink region read

This 2 patches consist of fixes for devlink region read handling.

v0->v1:
 - Fixed typo from user to use
v1->v2:
 - Rebased
====================

Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2019-02-14 11:45:39 -05:00
commit a08ef41f71
1 changed files with 25 additions and 10 deletions
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35
net/core/devlink.c
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@ -116,6 +116,8 @@ static struct devlink *devlink_get_from_attrs(struct net *net,
busname = nla_data(attrs[DEVLINK_ATTR_BUS_NAME]);
devname = nla_data(attrs[DEVLINK_ATTR_DEV_NAME]);
lockdep_assert_held(&devlink_mutex);
list_for_each_entry(devlink, &devlink_list, list) {
if (strcmp(devlink->dev->bus->name, busname) == 0 &&
strcmp(dev_name(devlink->dev), devname) == 0 &&
@ -3645,27 +3647,35 @@ static int devlink_nl_cmd_region_read_dumpit(struct sk_buff *skb,
if (err)
goto out_free;
devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs);
if (IS_ERR(devlink))
goto out_free;
mutex_lock(&devlink_mutex);
devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs);
if (IS_ERR(devlink)) {
err = PTR_ERR(devlink);
goto out_dev;
}
mutex_lock(&devlink->lock);
if (!attrs[DEVLINK_ATTR_REGION_NAME] ||
!attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID])
!attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]) {
err = -EINVAL;
goto out_unlock;
}
region_name = nla_data(attrs[DEVLINK_ATTR_REGION_NAME]);
region = devlink_region_get_by_name(devlink, region_name);
if (!region)
if (!region) {
err = -EINVAL;
goto out_unlock;
}
hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
&devlink_nl_family, NLM_F_ACK | NLM_F_MULTI,
DEVLINK_CMD_REGION_READ);
if (!hdr)
if (!hdr) {
err = -EMSGSIZE;
goto out_unlock;
}
err = devlink_nl_put_handle(skb, devlink);
if (err)
@ -3676,8 +3686,10 @@ static int devlink_nl_cmd_region_read_dumpit(struct sk_buff *skb,
goto nla_put_failure;
chunks_attr = nla_nest_start(skb, DEVLINK_ATTR_REGION_CHUNKS);
if (!chunks_attr)
if (!chunks_attr) {
err = -EMSGSIZE;
goto nla_put_failure;
}
if (attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR] &&
attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]) {
@ -3700,8 +3712,10 @@ static int devlink_nl_cmd_region_read_dumpit(struct sk_buff *skb,
goto nla_put_failure;
/* Check if there was any progress done to prevent infinite loop */
if (ret_offset == start_offset)
if (ret_offset == start_offset) {
err = -EINVAL;
goto nla_put_failure;
}
*((u64 *)&cb->args[0]) = ret_offset;
@ -3717,10 +3731,11 @@ nla_put_failure:
genlmsg_cancel(skb, hdr);
out_unlock:
mutex_unlock(&devlink->lock);
out_dev:
mutex_unlock(&devlink_mutex);
out_free:
kfree(attrs);
return 0;
return err;
}
struct devlink_info_req {