Re: [Internet]Re: [PATCH net-next v4 4/4] net: tun: track dropped skb via kfree_skb_reason()
From: imagedong (董梦龙) <hidden>
Date: 2022-03-02 04:25:55
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On 2022/3/2 AM 11:29，“David Ahern”[off-list ref] write:
On 3/1/22 7:50 PM, Jakub Kicinski wrote:quoted
On Sat, 26 Feb 2022 00:49:29 -0800 Dongli Zhang wrote:quoted
+ SKB_DROP_REASON_SKB_PULL, /* failed to pull sk_buff data */ + SKB_DROP_REASON_SKB_TRIM, /* failed to trim sk_buff data */
[...]
quoted
quoted
SKB_DROP_REASON_DEV_HDR, /* there is something wrong with * device driver specific header */ + SKB_DROP_REASON_DEV_READY, /* device is not ready */What is ready? link is not up? peer not connected? can we expand?As I recall in this case it is the tfile for a tun device disappeared - ie., a race condition.
This seems is that tun is not attached to a file (the tun device file is not opened?) Maybe TAP_UNATTACHED is more suitable :)