Re: [PATCH 1/3] Add TX sending hardware timestamp.

["Geva, Erez" <erez.geva.ext@siemens.com>]

On 10/12/2020 13:33, Geva, Erez (ext) (DI PA CI R&D 3) wrote:
> 
> On 10/12/2020 04:11, kernel test robot wrote:
>> Hi Erez,
>>
>> Thank you for the patch! Yet something to improve:
>>
> Thanks for the robot,
> as we rarely use clang for kernel. It is very helpful.
> 
>> [auto build test ERROR on b65054597872ce3aefbc6a666385eabdf9e288da]
>>
>> url:    https://github.com/0day-ci/linux/commits/Erez-Geva/Add-sending-TX-hardware-timestamp-for-TC-ETF-Qdisc/20201210-000521
> I can not find this commit
> 
>> base:    b65054597872ce3aefbc6a666385eabdf9e288da
>> config: mips-randconfig-r026-20201209 (attached as .config)
>> compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 1968804ac726e7674d5de22bc2204b45857da344)
> However the clang in
> https://download.01.org/0day-ci/cross-package/clang-latest/clang.tar.xz  is version 11
> 
>> reproduce (this is a W=1 build):
>>           wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> Your make cross script tries to download the clang every time.
> Please separate the download (which is ~400 MB and 2 GB after open) from the compilation.
> 
> Please use "wget" follow your own instructions in this email.
> 
>>           chmod +x ~/bin/make.cross
>>           # install mips cross compiling tool for clang build
>>           # apt-get install binutils-mips-linux-gnu
>>           # https://github.com/0day-ci/linux/commit/8a8f634bc74db16dc551cfcf3b63c1183f98eaac
>>           git remote add linux-review https://github.com/0day-ci/linux
>>           git fetch --no-tags linux-review Erez-Geva/Add-sending-TX-hardware-timestamp-for-TC-ETF-Qdisc/20201210-000521
> This branch is absent
> 
>>           git checkout 8a8f634bc74db16dc551cfcf3b63c1183f98eaac
> This commit as well
> 
>>           # save the attached .config to linux build tree
>>           COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=mips
>>
> I use Debian 10.7.
> I usually compile with GCC. I have not see any errors.
> 
> When I use clang 11 from download.01.org I get a crash right away.
> Please add a proper instructions how to use clang on Debian or provide
> a Docker container with updated clang for testing.
> 
>> If you fix the issue, kindly add following tag as appropriate
>> Reported-by: kernel test robot <lkp@intel.com>
>>
>> All errors (new ones prefixed by >>):
>>
>>>> net/core/sock.c:2383:7: error: use of undeclared identifier 'SCM_HW_TXTIME'; did you mean 'SOCK_HW_TXTIME'?
>>              case SCM_HW_TXTIME:
>>                   ^~~~~~~~~~~~~
>>                   SOCK_HW_TXTIME
>>      include/net/sock.h:862:2: note: 'SOCK_HW_TXTIME' declared here
>>              SOCK_HW_TXTIME,
>>              ^
>>      1 error generated.
>>
>> vim +2383 net/core/sock.c
>>
>>     2351	
>>     2352	int __sock_cmsg_send(struct sock *sk, struct msghdr *msg, struct cmsghdr *cmsg,
>>     2353			     struct sockcm_cookie *sockc)
>>     2354	{
>>     2355		u32 tsflags;
>>     2356	
>>     2357		switch (cmsg->cmsg_type) {
>>     2358		case SO_MARK:
>>     2359			if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
>>     2360				return -EPERM;
>>     2361			if (cmsg->cmsg_len != CMSG_LEN(sizeof(u32)))
>>     2362				return -EINVAL;
>>     2363			sockc->mark = *(u32 *)CMSG_DATA(cmsg);
>>     2364			break;
>>     2365		case SO_TIMESTAMPING_OLD:
>>     2366			if (cmsg->cmsg_len != CMSG_LEN(sizeof(u32)))
>>     2367				return -EINVAL;
>>     2368	
>>     2369			tsflags = *(u32 *)CMSG_DATA(cmsg);
>>     2370			if (tsflags & ~SOF_TIMESTAMPING_TX_RECORD_MASK)
>>     2371				return -EINVAL;
>>     2372	
>>     2373			sockc->tsflags &= ~SOF_TIMESTAMPING_TX_RECORD_MASK;
>>     2374			sockc->tsflags |= tsflags;
>>     2375			break;
>>     2376		case SCM_TXTIME:
>>     2377			if (!sock_flag(sk, SOCK_TXTIME))
>>     2378				return -EINVAL;
>>     2379			if (cmsg->cmsg_len != CMSG_LEN(sizeof(u64)))
>>     2380				return -EINVAL;
>>     2381			sockc->transmit_time = get_unaligned((u64 *)CMSG_DATA(cmsg));
>>     2382			break;
>>> 2383		case SCM_HW_TXTIME:
>>     2384			if (!sock_flag(sk, SOCK_HW_TXTIME))
>>     2385				return -EINVAL;
>>     2386			if (cmsg->cmsg_len != CMSG_LEN(sizeof(u64)))
>>     2387				return -EINVAL;
>>     2388			sockc->transmit_hw_time = get_unaligned((u64 *)CMSG_DATA(cmsg));
>>     2389			break;
>>     2390		/* SCM_RIGHTS and SCM_CREDENTIALS are semantically in SOL_UNIX. */
>>     2391		case SCM_RIGHTS:
>>     2392		case SCM_CREDENTIALS:
>>     2393			break;
>>     2394		default:
>>     2395			return -EINVAL;
>>     2396		}
>>     2397		return 0;
>>     2398	}
>>     2399	EXPORT_SYMBOL(__sock_cmsg_send);
>>     2400	
>>
>> ---
>> 0-DAY CI Kernel Test Service, Intel Corporation
>> https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
>>
> 
> Please improve the robot, so we can comply and properly support clang compilation.
> 
> Thanks
>     Erez
> 

Update,

I use the same .config from the Intel robot test.

I was trying to compile v5.10-rc6 with GCC cross compiler for mips.

# apt-get install -t sid gcc-mips-linux-gnu

kernel-test ((v5.10-rc6))$ /usr/bin/mips-linux-gnu-gcc --version
mips-linux-gnu-gcc (Debian 10.2.0-17) 10.2.0
Copyright (C) 2020 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

kernel-test ((v5.10-rc6))$ cp ../intel_robot.config .config
kernel-test ((v5.10-rc6))$ make ARCH=mips CROSS_COMPILE=/usr/bin/mips-linux-gnu- olddefconfig
...

kernel-test ((v5.10-rc6))$ make ARCH=mips CROSS_COMPILE=/usr/bin/mips-linux-gnu- all
...
  CC      init/main.o
{standard input}: Assembler messages:
{standard input}:9103: Error: found '(', expected: ')'
{standard input}:9103: Error: found '(', expected: ')'
{standard input}:9103: Error: non-constant expression in ".if" statement
{standard input}:9103: Error: junk at end of line, first unrecognized character is `('
make[1]: *** [scripts/Makefile.build:283: init/main.o] Error 1
make: *** [Makefile:1797: init] Error 2

Erez