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Message-ID: <202303211550.hxkdeVey-lkp@intel.com>
Date: Tue, 21 Mar 2023 15:24:40 +0800
From: kernel test robot <lkp@...el.com>
To: Eric Dumazet <eric.dumazet@...il.com>,
"David S . Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
netdev <netdev@...r.kernel.org>,
Eric Dumazet <edumazet@...gle.com>
Subject: Re: [PATCH net-next] net: introduce a config option to tweak
MAX_SKB_FRAGS
Hi Eric,
I love your patch! Yet something to improve:
[auto build test ERROR on net-next/main]
url: https://github.com/intel-lab-lkp/linux/commits/Eric-Dumazet/net-introduce-a-config-option-to-tweak-MAX_SKB_FRAGS/20230321-113826
patch link: https://lore.kernel.org/r/20230321033704.936685-1-eric.dumazet%40gmail.com
patch subject: [PATCH net-next] net: introduce a config option to tweak MAX_SKB_FRAGS
config: riscv-randconfig-r016-20230319 (https://download.01.org/0day-ci/archive/20230321/202303211550.hxkdeVey-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 67409911353323ca5edf2049ef0df54132fa1ca7)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install riscv cross compiling tool for clang build
# apt-get install binutils-riscv-linux-gnu
# https://github.com/intel-lab-lkp/linux/commit/d0eaa3eabce1c80d067a739749e4253546417722
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Eric-Dumazet/net-introduce-a-config-option-to-tweak-MAX_SKB_FRAGS/20230321-113826
git checkout d0eaa3eabce1c80d067a739749e4253546417722
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash drivers/bus/mhi/host/ kernel/bpf/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202303211550.hxkdeVey-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from drivers/bus/mhi/host/init.c:15:
In file included from include/linux/mhi.h:12:
>> include/linux/skbuff.h:593:19: error: use of undeclared identifier 'CONFIG_MAX_SKB_FRAGS'
skb_frag_t frags[MAX_SKB_FRAGS];
^
include/linux/skbuff.h:348:23: note: expanded from macro 'MAX_SKB_FRAGS'
#define MAX_SKB_FRAGS CONFIG_MAX_SKB_FRAGS
^
1 error generated.
--
In file included from drivers/bus/mhi/host/main.c:13:
In file included from include/linux/mhi.h:12:
>> include/linux/skbuff.h:593:19: error: use of undeclared identifier 'CONFIG_MAX_SKB_FRAGS'
skb_frag_t frags[MAX_SKB_FRAGS];
^
include/linux/skbuff.h:348:23: note: expanded from macro 'MAX_SKB_FRAGS'
#define MAX_SKB_FRAGS CONFIG_MAX_SKB_FRAGS
^
drivers/bus/mhi/host/main.c:803:13: warning: parameter 'event_quota' set but not used [-Wunused-but-set-parameter]
u32 event_quota)
^
1 warning and 1 error generated.
--
In file included from kernel/bpf/core.c:21:
In file included from include/linux/filter.h:12:
>> include/linux/skbuff.h:593:19: error: use of undeclared identifier 'CONFIG_MAX_SKB_FRAGS'
skb_frag_t frags[MAX_SKB_FRAGS];
^
include/linux/skbuff.h:348:23: note: expanded from macro 'MAX_SKB_FRAGS'
#define MAX_SKB_FRAGS CONFIG_MAX_SKB_FRAGS
^
kernel/bpf/core.c:1632:12: warning: no previous prototype for function 'bpf_probe_read_kernel' [-Wmissing-prototypes]
u64 __weak bpf_probe_read_kernel(void *dst, u32 size, const void *unsafe_ptr)
^
kernel/bpf/core.c:1632:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
u64 __weak bpf_probe_read_kernel(void *dst, u32 size, const void *unsafe_ptr)
^
static
1 warning and 1 error generated.
--
In file included from kernel/bpf/btf.c:19:
In file included from include/linux/bpf_verifier.h:9:
In file included from include/linux/filter.h:12:
>> include/linux/skbuff.h:593:19: error: use of undeclared identifier 'CONFIG_MAX_SKB_FRAGS'
skb_frag_t frags[MAX_SKB_FRAGS];
^
include/linux/skbuff.h:348:23: note: expanded from macro 'MAX_SKB_FRAGS'
#define MAX_SKB_FRAGS CONFIG_MAX_SKB_FRAGS
^
In file included from kernel/bpf/btf.c:23:
>> include/linux/skmsg.h:32:23: error: use of undeclared identifier 'CONFIG_MAX_SKB_FRAGS'
DECLARE_BITMAP(copy, MAX_MSG_FRAGS + 2);
^
include/linux/skmsg.h:16:25: note: expanded from macro 'MAX_MSG_FRAGS'
#define MAX_MSG_FRAGS MAX_SKB_FRAGS
^
include/linux/skbuff.h:348:23: note: expanded from macro 'MAX_SKB_FRAGS'
#define MAX_SKB_FRAGS CONFIG_MAX_SKB_FRAGS
^
In file included from kernel/bpf/btf.c:23:
include/linux/skmsg.h:39:27: error: use of undeclared identifier 'CONFIG_MAX_SKB_FRAGS'
struct scatterlist data[MAX_MSG_FRAGS + 2];
^
include/linux/skmsg.h:16:25: note: expanded from macro 'MAX_MSG_FRAGS'
#define MAX_MSG_FRAGS MAX_SKB_FRAGS
^
include/linux/skbuff.h:348:23: note: expanded from macro 'MAX_SKB_FRAGS'
#define MAX_SKB_FRAGS CONFIG_MAX_SKB_FRAGS
^
In file included from kernel/bpf/btf.c:23:
include/linux/skmsg.h:151:45: error: use of undeclared identifier 'CONFIG_MAX_SKB_FRAGS'
return end >= start ? end - start : end + (NR_MSG_FRAG_IDS - start);
^
include/linux/skmsg.h:17:28: note: expanded from macro 'NR_MSG_FRAG_IDS'
#define NR_MSG_FRAG_IDS (MAX_MSG_FRAGS + 1)
^
include/linux/skmsg.h:16:25: note: expanded from macro 'MAX_MSG_FRAGS'
#define MAX_MSG_FRAGS MAX_SKB_FRAGS
^
include/linux/skbuff.h:348:23: note: expanded from macro 'MAX_SKB_FRAGS'
#define MAX_SKB_FRAGS CONFIG_MAX_SKB_FRAGS
^
In file included from kernel/bpf/btf.c:23:
include/linux/skmsg.h:177:47: error: use of undeclared identifier 'CONFIG_MAX_SKB_FRAGS'
BUILD_BUG_ON(ARRAY_SIZE(msg->sg.data) - 1 != NR_MSG_FRAG_IDS);
^
include/linux/skmsg.h:17:28: note: expanded from macro 'NR_MSG_FRAG_IDS'
#define NR_MSG_FRAG_IDS (MAX_MSG_FRAGS + 1)
^
include/linux/skmsg.h:16:25: note: expanded from macro 'MAX_MSG_FRAGS'
#define MAX_MSG_FRAGS MAX_SKB_FRAGS
^
include/linux/skbuff.h:348:23: note: expanded from macro 'MAX_SKB_FRAGS'
#define MAX_SKB_FRAGS CONFIG_MAX_SKB_FRAGS
^
In file included from kernel/bpf/btf.c:23:
include/linux/skmsg.h:179:31: error: use of undeclared identifier 'CONFIG_MAX_SKB_FRAGS'
sg_init_marker(msg->sg.data, NR_MSG_FRAG_IDS);
^
include/linux/skmsg.h:17:28: note: expanded from macro 'NR_MSG_FRAG_IDS'
#define NR_MSG_FRAG_IDS (MAX_MSG_FRAGS + 1)
^
include/linux/skmsg.h:16:25: note: expanded from macro 'MAX_MSG_FRAGS'
#define MAX_MSG_FRAGS MAX_SKB_FRAGS
^
include/linux/skbuff.h:348:23: note: expanded from macro 'MAX_SKB_FRAGS'
#define MAX_SKB_FRAGS CONFIG_MAX_SKB_FRAGS
^
In file included from kernel/bpf/btf.c:23:
include/linux/skmsg.h:201:57: error: use of undeclared identifier 'CONFIG_MAX_SKB_FRAGS'
return sk_msg_iter_dist(msg->sg.start, msg->sg.end) == MAX_MSG_FRAGS;
^
include/linux/skmsg.h:16:25: note: expanded from macro 'MAX_MSG_FRAGS'
#define MAX_MSG_FRAGS MAX_SKB_FRAGS
^
include/linux/skbuff.h:348:23: note: expanded from macro 'MAX_SKB_FRAGS'
#define MAX_SKB_FRAGS CONFIG_MAX_SKB_FRAGS
^
In file included from kernel/bpf/btf.c:23:
include/linux/skmsg.h:254:2: error: use of undeclared identifier 'CONFIG_MAX_SKB_FRAGS'
sk_msg_iter_next(msg, end);
^
include/linux/skmsg.h:173:2: note: expanded from macro 'sk_msg_iter_next'
sk_msg_iter_var_next(msg->sg.which)
^
include/linux/skmsg.h:165:14: note: expanded from macro 'sk_msg_iter_var_next'
if (var == NR_MSG_FRAG_IDS) \
^
include/linux/skmsg.h:17:28: note: expanded from macro 'NR_MSG_FRAG_IDS'
#define NR_MSG_FRAG_IDS (MAX_MSG_FRAGS + 1)
^
include/linux/skmsg.h:16:25: note: expanded from macro 'MAX_MSG_FRAGS'
#define MAX_MSG_FRAGS MAX_SKB_FRAGS
^
include/linux/skbuff.h:348:23: note: expanded from macro 'MAX_SKB_FRAGS'
#define MAX_SKB_FRAGS CONFIG_MAX_SKB_FRAGS
^
In file included from kernel/bpf/btf.c:23:
include/linux/skmsg.h:264:3: error: use of undeclared identifier 'CONFIG_MAX_SKB_FRAGS'
sk_msg_iter_var_next(i);
^
include/linux/skmsg.h:165:14: note: expanded from macro 'sk_msg_iter_var_next'
if (var == NR_MSG_FRAG_IDS) \
^
include/linux/skmsg.h:17:28: note: expanded from macro 'NR_MSG_FRAG_IDS'
#define NR_MSG_FRAG_IDS (MAX_MSG_FRAGS + 1)
^
include/linux/skmsg.h:16:25: note: expanded from macro 'MAX_MSG_FRAGS'
#define MAX_MSG_FRAGS MAX_SKB_FRAGS
^
include/linux/skbuff.h:348:23: note: expanded from macro 'MAX_SKB_FRAGS'
vim +/CONFIG_MAX_SKB_FRAGS +593 include/linux/skbuff.h
6f89dbce8e11344 Sowmini Varadhan 2018-02-15 565
^1da177e4c3f415 Linus Torvalds 2005-04-16 566 /* This data is invariant across clones and lives at
^1da177e4c3f415 Linus Torvalds 2005-04-16 567 * the end of the header data, ie. at skb->end.
^1da177e4c3f415 Linus Torvalds 2005-04-16 568 */
^1da177e4c3f415 Linus Torvalds 2005-04-16 569 struct skb_shared_info {
06b4feb37e64e54 Jonathan Lemon 2021-01-06 570 __u8 flags;
de8f3a83b0a0fdd Daniel Borkmann 2017-09-25 571 __u8 meta_len;
de8f3a83b0a0fdd Daniel Borkmann 2017-09-25 572 __u8 nr_frags;
9f42f126154786e Ian Campbell 2012-01-05 573 __u8 tx_flags;
7967168cefdbc63 Herbert Xu 2006-06-22 574 unsigned short gso_size;
7967168cefdbc63 Herbert Xu 2006-06-22 575 /* Warning: this field is not always filled in (UFO)! */
7967168cefdbc63 Herbert Xu 2006-06-22 576 unsigned short gso_segs;
^1da177e4c3f415 Linus Torvalds 2005-04-16 577 struct sk_buff *frag_list;
ac45f602ee3d1b6 Patrick Ohly 2009-02-12 578 struct skb_shared_hwtstamps hwtstamps;
7f564528a480084 Steffen Klassert 2017-04-08 579 unsigned int gso_type;
09c2d251b707236 Willem de Bruijn 2014-08-04 580 u32 tskey;
ec7d2f2cf3a1b76 Eric Dumazet 2010-05-05 581
ec7d2f2cf3a1b76 Eric Dumazet 2010-05-05 582 /*
ec7d2f2cf3a1b76 Eric Dumazet 2010-05-05 583 * Warning : all fields before dataref are cleared in __alloc_skb()
ec7d2f2cf3a1b76 Eric Dumazet 2010-05-05 584 */
ec7d2f2cf3a1b76 Eric Dumazet 2010-05-05 585 atomic_t dataref;
d16697cb6261d4c Lorenzo Bianconi 2022-01-21 586 unsigned int xdp_frags_size;
ec7d2f2cf3a1b76 Eric Dumazet 2010-05-05 587
69e3c75f4d541a6 Johann Baudy 2009-05-18 588 /* Intermediate layers must ensure that destructor_arg
69e3c75f4d541a6 Johann Baudy 2009-05-18 589 * remains valid until skb destructor */
69e3c75f4d541a6 Johann Baudy 2009-05-18 590 void * destructor_arg;
a6686f2f382b13f Shirley Ma 2011-07-06 591
fed66381d65a351 Eric Dumazet 2010-07-22 592 /* must be last field, see pskb_expand_head() */
fed66381d65a351 Eric Dumazet 2010-07-22 @593 skb_frag_t frags[MAX_SKB_FRAGS];
^1da177e4c3f415 Linus Torvalds 2005-04-16 594 };
^1da177e4c3f415 Linus Torvalds 2005-04-16 595
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests
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