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netlink: add net device refcount tracker to struct ethnl_req_info 

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2096377

commit e4b8954074f6d0db01c8c97d338a67f9389c042f
Author: Eric Dumazet <edumazet@google.com>
Date:   Mon Dec 6 17:30:37 2021 -0800

    netlink: add net device refcount tracker to struct ethnl_req_info

    Signed-off-by: Eric Dumazet <edumazet@google.com>
    Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Signed-off-by: Ivan Vecera <ivecera@redhat.com>
This commit is contained in:
Ivan Vecera 2022-06-13 18:38:39 +02:00
parent 99abf88617
commit b97812beba
2 changed files with 7 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
net/ethtool/netlink.c
View File

@ -142,6 +142,7 @@ int ethnl_parse_header_dev_get(struct ethnl_req_info *req_info,
}
req_info->dev = dev;
netdev_tracker_alloc(dev, &req_info->dev_tracker, GFP_KERNEL);
req_info->flags = flags;
return 0;
}
@ -400,7 +401,7 @@ static int ethnl_default_doit(struct sk_buff *skb, struct genl_info *info)
ops->cleanup_data(reply_data);
genlmsg_end(rskb, reply_payload);
dev_put(req_info->dev);
dev_put_track(req_info->dev, &req_info->dev_tracker);
kfree(reply_data);
kfree(req_info);
return genlmsg_reply(rskb, info);
@ -412,7 +413,7 @@ err_cleanup:
if (ops->cleanup_data)
ops->cleanup_data(reply_data);
err_dev:
dev_put(req_info->dev);
dev_put_track(req_info->dev, &req_info->dev_tracker);
kfree(reply_data);
kfree(req_info);
return ret;
@ -548,7 +549,7 @@ static int ethnl_default_start(struct netlink_callback *cb)
* same parser as for non-dump (doit) requests is used, it
* would take reference to the device if it finds one
*/
dev_put(req_info->dev);
dev_put_track(req_info->dev, &req_info->dev_tracker);
req_info->dev = NULL;
}
if (ret < 0)
@ -625,6 +626,7 @@ static void ethnl_default_notify(struct net_device *dev, unsigned int cmd,
}
req_info->dev = dev;
netdev_tracker_alloc(dev, &req_info->dev_tracker, GFP_KERNEL);
req_info->flags |= ETHTOOL_FLAG_COMPACT_BITSETS;
ethnl_init_reply_data(reply_data, ops, dev);

2
net/ethtool/netlink.h
View File

@ -222,6 +222,7 @@ static inline unsigned int ethnl_reply_header_size(void)
/**
* struct ethnl_req_info - base type of request information for GET requests
* @dev: network device the request is for (may be null)
* @dev_tracker: refcount tracker for @dev reference
* @flags: request flags common for all request types
*
* This is a common base for request specific structures holding data from
@ -230,6 +231,7 @@ static inline unsigned int ethnl_reply_header_size(void)
*/
struct ethnl_req_info {
struct net_device *dev;
netdevice_tracker dev_tracker;
u32 flags;
};