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Date: Tue, 12 May 2020 02:57:50 +0300
From: Vladimir Oltean <olteanv@...il.com>
To: kbuild test robot <lkp@...el.com>
Cc: Andrew Lunn <andrew@...n.ch>,
Florian Fainelli <f.fainelli@...il.com>,
Vivien Didelot <vivien.didelot@...il.com>,
kbuild-all@...ts.01.org, "David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Jiri Pirko <jiri@...lanox.com>,
Ido Schimmel <idosch@...sch.org>,
Russell King <rmk+kernel@...linux.org.uk>,
netdev <netdev@...r.kernel.org>,
lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 net-next 03/15] net: dsa: sja1105: keep the VLAN
awareness state in a driver variable
On Tue, 12 May 2020 at 01:59, kbuild test robot <lkp@...el.com> wrote:
>
> Hi Vladimir,
>
> I love your patch! Yet something to improve:
>
> [auto build test ERROR on net-next/master]
> [cannot apply to linus/master v5.7-rc5]
> [if your patch is applied to the wrong git tree, please drop us a note to help
> improve the system. BTW, we also suggest to use '--base' option to specify the
> base tree in git format-patch, please see https://stackoverflow.com/a/37406982]
>
> url: https://github.com/0day-ci/linux/commits/Vladimir-Oltean/Traffic-support-for-dsa_8021q-in-vlan_filtering-1-mode/20200512-024329
> base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git a6f0b26d6a5dcf27980e65f965779a929039f11d
> config: xtensa-randconfig-r021-20200511 (attached as .config)
> compiler: xtensa-linux-gcc (GCC) 9.3.0
> reproduce:
> wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> chmod +x ~/bin/make.cross
> # save the attached .config to linux build tree
> COMPILER_INSTALL_PATH=$HOME/0day GCC_VERSION=9.3.0 make.cross ARCH=xtensa
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kbuild test robot <lkp@...el.com>
>
> All errors (new ones prefixed by >>):
>
> xtensa-linux-ld: net/dsa/tag_sja1105.o: in function `sja1105_rcv':
> >> net/dsa/tag_sja1105.c:305: undefined reference to `sja1105_can_use_vlan_as_tags'
> xtensa-linux-ld: net/dsa/tag_sja1105.o: in function `sja1105_filter':
> net/dsa/tag_sja1105.c:77: undefined reference to `sja1105_can_use_vlan_as_tags'
>
Argh, this is by compiling the tagger module without the driver, it
looks like I can't get away with doing this.
The issue is that I don't want to expose struct sja1105_private
publicly, but I do have a struct sja1105_port hanging off of dp->priv.
But I don't have access to a dp pointer in the .filter method... So
the only realistic idea I have is to provide a shim implementation for
the call.
> vim +305 net/dsa/tag_sja1105.c
>
> f3097be21bf17a Vladimir Oltean 2019-06-08 246
> 227d07a07ef126 Vladimir Oltean 2019-05-05 247 static struct sk_buff *sja1105_rcv(struct sk_buff *skb,
> 227d07a07ef126 Vladimir Oltean 2019-05-05 248 struct net_device *netdev,
> 227d07a07ef126 Vladimir Oltean 2019-05-05 249 struct packet_type *pt)
> 227d07a07ef126 Vladimir Oltean 2019-05-05 250 {
> e53e18a6fe4d3a Vladimir Oltean 2019-06-08 251 struct sja1105_meta meta = {0};
> d461933638ae9f Vladimir Oltean 2019-06-08 252 int source_port, switch_id;
> e80f40cbe4dd51 Vladimir Oltean 2020-03-24 253 struct ethhdr *hdr;
> 227d07a07ef126 Vladimir Oltean 2019-05-05 254 u16 tpid, vid, tci;
> 42824463d38d27 Vladimir Oltean 2019-06-08 255 bool is_link_local;
> 227d07a07ef126 Vladimir Oltean 2019-05-05 256 bool is_tagged;
> e53e18a6fe4d3a Vladimir Oltean 2019-06-08 257 bool is_meta;
> 227d07a07ef126 Vladimir Oltean 2019-05-05 258
> e80f40cbe4dd51 Vladimir Oltean 2020-03-24 259 hdr = eth_hdr(skb);
> e80f40cbe4dd51 Vladimir Oltean 2020-03-24 260 tpid = ntohs(hdr->h_proto);
> d461933638ae9f Vladimir Oltean 2019-06-08 261 is_tagged = (tpid == ETH_P_SJA1105);
> 42824463d38d27 Vladimir Oltean 2019-06-08 262 is_link_local = sja1105_is_link_local(skb);
> e53e18a6fe4d3a Vladimir Oltean 2019-06-08 263 is_meta = sja1105_is_meta_frame(skb);
> 227d07a07ef126 Vladimir Oltean 2019-05-05 264
> 227d07a07ef126 Vladimir Oltean 2019-05-05 265 skb->offload_fwd_mark = 1;
> 227d07a07ef126 Vladimir Oltean 2019-05-05 266
> 42824463d38d27 Vladimir Oltean 2019-06-08 267 if (is_tagged) {
> 42824463d38d27 Vladimir Oltean 2019-06-08 268 /* Normal traffic path. */
> e80f40cbe4dd51 Vladimir Oltean 2020-03-24 269 skb_push_rcsum(skb, ETH_HLEN);
> e80f40cbe4dd51 Vladimir Oltean 2020-03-24 270 __skb_vlan_pop(skb, &tci);
> e80f40cbe4dd51 Vladimir Oltean 2020-03-24 271 skb_pull_rcsum(skb, ETH_HLEN);
> e80f40cbe4dd51 Vladimir Oltean 2020-03-24 272 skb_reset_network_header(skb);
> e80f40cbe4dd51 Vladimir Oltean 2020-03-24 273 skb_reset_transport_header(skb);
> e80f40cbe4dd51 Vladimir Oltean 2020-03-24 274
> 42824463d38d27 Vladimir Oltean 2019-06-08 275 vid = tci & VLAN_VID_MASK;
> 42824463d38d27 Vladimir Oltean 2019-06-08 276 source_port = dsa_8021q_rx_source_port(vid);
> 42824463d38d27 Vladimir Oltean 2019-06-08 277 switch_id = dsa_8021q_rx_switch_id(vid);
> 42824463d38d27 Vladimir Oltean 2019-06-08 278 skb->priority = (tci & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
> 42824463d38d27 Vladimir Oltean 2019-06-08 279 } else if (is_link_local) {
> 227d07a07ef126 Vladimir Oltean 2019-05-05 280 /* Management traffic path. Switch embeds the switch ID and
> 227d07a07ef126 Vladimir Oltean 2019-05-05 281 * port ID into bytes of the destination MAC, courtesy of
> 227d07a07ef126 Vladimir Oltean 2019-05-05 282 * the incl_srcpt options.
> 227d07a07ef126 Vladimir Oltean 2019-05-05 283 */
> 227d07a07ef126 Vladimir Oltean 2019-05-05 284 source_port = hdr->h_dest[3];
> 227d07a07ef126 Vladimir Oltean 2019-05-05 285 switch_id = hdr->h_dest[4];
> 227d07a07ef126 Vladimir Oltean 2019-05-05 286 /* Clear the DMAC bytes that were mangled by the switch */
> 227d07a07ef126 Vladimir Oltean 2019-05-05 287 hdr->h_dest[3] = 0;
> 227d07a07ef126 Vladimir Oltean 2019-05-05 288 hdr->h_dest[4] = 0;
> e53e18a6fe4d3a Vladimir Oltean 2019-06-08 289 } else if (is_meta) {
> e53e18a6fe4d3a Vladimir Oltean 2019-06-08 290 sja1105_meta_unpack(skb, &meta);
> e53e18a6fe4d3a Vladimir Oltean 2019-06-08 291 source_port = meta.source_port;
> e53e18a6fe4d3a Vladimir Oltean 2019-06-08 292 switch_id = meta.switch_id;
> 227d07a07ef126 Vladimir Oltean 2019-05-05 293 } else {
> 42824463d38d27 Vladimir Oltean 2019-06-08 294 return NULL;
> 227d07a07ef126 Vladimir Oltean 2019-05-05 295 }
> 227d07a07ef126 Vladimir Oltean 2019-05-05 296
> 227d07a07ef126 Vladimir Oltean 2019-05-05 297 skb->dev = dsa_master_find_slave(netdev, switch_id, source_port);
> 227d07a07ef126 Vladimir Oltean 2019-05-05 298 if (!skb->dev) {
> 227d07a07ef126 Vladimir Oltean 2019-05-05 299 netdev_warn(netdev, "Couldn't decode source port\n");
> 227d07a07ef126 Vladimir Oltean 2019-05-05 300 return NULL;
> 227d07a07ef126 Vladimir Oltean 2019-05-05 301 }
> 227d07a07ef126 Vladimir Oltean 2019-05-05 302
> f3097be21bf17a Vladimir Oltean 2019-06-08 303 return sja1105_rcv_meta_state_machine(skb, &meta, is_link_local,
> f3097be21bf17a Vladimir Oltean 2019-06-08 304 is_meta);
> 227d07a07ef126 Vladimir Oltean 2019-05-05 @305 }
> 227d07a07ef126 Vladimir Oltean 2019-05-05 306
>
> :::::: The code at line 305 was first introduced by commit
> :::::: 227d07a07ef126272ea2eed97fd136cd7a803d81 net: dsa: sja1105: Add support for traffic through standalone ports
>
> :::::: TO: Vladimir Oltean <olteanv@...il.com>
> :::::: CC: David S. Miller <davem@...emloft.net>
>
> ---
> 0-DAY CI Kernel Test Service, Intel Corporation
> https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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