Messages in this thread | | | From | Tom Gundersen <> | Date | Fri, 18 Jul 2014 10:41:33 +0200 | Subject | Re: [PATCH net-next v9 3/9] net: nl802154 - make add_iface take name assign type |
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On Fri, Jul 18, 2014 at 1:19 AM, David Miller <davem@davemloft.net> wrote: > From: Tom Gundersen <teg@jklm.no> > Date: Thu, 17 Jul 2014 10:06:04 +0200 > >> @@ -192,8 +193,10 @@ int ieee802154_add_iface(struct sk_buff *skb, struct genl_info *info) >> if (devname[nla_len(info->attrs[IEEE802154_ATTR_DEV_NAME]) - 1] >> != '\0') >> return -EINVAL; /* phy name should be null-terminated */ >> + name_assign_type = NET_NAME_USER; >> } else { >> devname = "wpan%d"; >> + name_assign_type = NET_NAME_ENUM; >> } >> >> if (strlen(devname) >= IFNAMSIZ) > > Just wondering what should happen if "%d" appears in a user provided name. > > That would seem to be both USER and ENUM.
Yes, this is a bit of a grey area.
I discussed this a bit with David Herrmann, and we landed on that these names should be USER. As the user has explicitly asked for the enumerated name, nobody should rename them to anything else (so ENUM would have the wrong effect as it indicates that userspace should rename the device), moreover, we should assume that the user knows what they are doing, and that the enumerated names are fine in this context.
Cheers,
Tom
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