Subject: Re: [PATCH 08/31] net/tcp: Introduce TCP_AO setsockopt()s

From: kernel test robot <[email-masked]>
Date: Fri, 19 Aug 2022 02:50:13 +0800

Hi Dmitry,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on e34cfee65ec891a319ce79797dda18083af33a76]

url:    https://github.com/intel-lab-lkp/linux/commits/Dmitry-Safonov/net-tcp-Add-TCP-AO-support/20220819-010628
base:   e34cfee65ec891a319ce79797dda18083af33a76
config: x86_64-defconfig (https://download.01.org/0day-ci/archive/20220819/[email-masked]/config)
compiler: gcc-11 (Debian 11.3.0-5) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/469bd71e5ea011f6ae5a1554b75157471448341d
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Dmitry-Safonov/net-tcp-Add-TCP-AO-support/20220819-010628
        git checkout 469bd71e5ea011f6ae5a1554b75157471448341d
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash net/ipv4/ net/ipv6/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <[email-masked]>

All warnings (new ones prefixed by >>):

>> net/ipv4/tcp_ao.c:19:20: warning: no previous prototype for 'tcp_ao_do_lookup_rcvid' [-Wmissing-prototypes]
      19 | struct tcp_ao_key *tcp_ao_do_lookup_rcvid(struct sock *sk, u8 keyid)
         |                    ^~~~~~~~~~~~~~~~~~~~~~
   net/ipv4/tcp_ao.c:37:20: warning: no previous prototype for 'tcp_ao_do_lookup_sndid' [-Wmissing-prototypes]
      37 | struct tcp_ao_key *tcp_ao_do_lookup_sndid(const struct sock *sk, u8 keyid)
         |                    ^~~~~~~~~~~~~~~~~~~~~~
>> net/ipv4/tcp_ao.c:96:5: warning: no previous prototype for 'tcp_ao_key_cmp' [-Wmissing-prototypes]
      96 | int tcp_ao_key_cmp(const struct tcp_ao_key *key,
         |     ^~~~~~~~~~~~~~
   net/ipv4/tcp_ao.c:109:20: warning: no previous prototype for 'tcp_ao_do_lookup' [-Wmissing-prototypes]
     109 | struct tcp_ao_key *tcp_ao_do_lookup(const struct sock *sk,
         |                    ^~~~~~~~~~~~~~~~
>> net/ipv4/tcp_ao.c:145:6: warning: no previous prototype for 'tcp_ao_link_mkt' [-Wmissing-prototypes]
     145 | void tcp_ao_link_mkt(struct tcp_ao_info *ao, struct tcp_ao_key *mkt)
         |      ^~~~~~~~~~~~~~~

vim +/tcp_ao_do_lookup_rcvid +19 net/ipv4/tcp_ao.c

    18	
  > 19	struct tcp_ao_key *tcp_ao_do_lookup_rcvid(struct sock *sk, u8 keyid)
    20	{
    21		struct tcp_sock *tp = tcp_sk(sk);
    22		struct tcp_ao_key *key;
    23		struct tcp_ao_info *ao;
    24	
    25		ao = rcu_dereference_check(tp->ao_info, lockdep_sock_is_held(sk));
    26	
    27		if (!ao)
    28			return NULL;
    29	
    30		hlist_for_each_entry_rcu(key, &ao->head, node) {
    31			if (key->rcvid == keyid)
    32				return key;
    33		}
    34		return NULL;
    35	}
    36	
    37	struct tcp_ao_key *tcp_ao_do_lookup_sndid(const struct sock *sk, u8 keyid)
    38	{
    39		struct tcp_ao_key *key;
    40		struct tcp_ao_info *ao;
    41	
    42		ao = rcu_dereference_check(tcp_sk(sk)->ao_info,
    43					   lockdep_sock_is_held(sk));
    44		if (!ao)
    45			return NULL;
    46	
    47		hlist_for_each_entry_rcu(key, &ao->head, node) {
    48			if (key->sndid == keyid)
    49				return key;
    50		}
    51		return NULL;
    52	}
    53	
    54	static inline int ipv4_prefix_cmp(const struct in_addr *addr1,
    55					  const struct in_addr *addr2,
    56					  unsigned int prefixlen)
    57	{
    58		__be32 mask = inet_make_mask(prefixlen);
    59	
    60		if ((addr1->s_addr & mask) == (addr2->s_addr & mask))
    61			return 0;
    62		return ((addr1->s_addr & mask) > (addr2->s_addr & mask)) ? 1 : -1;
    63	}
    64	
    65	static int __tcp_ao_key_cmp(const struct tcp_ao_key *key,
    66				    const union tcp_ao_addr *addr, u8 prefixlen,
    67				    int family, int sndid, int rcvid, u16 port)
    68	{
    69		if (sndid >= 0 && key->sndid != sndid)
    70			return (key->sndid > sndid) ? 1 : -1;
    71		if (rcvid >= 0 && key->rcvid != rcvid)
    72			return (key->rcvid > rcvid) ? 1 : -1;
    73		if (port != 0 && key->port != 0 && port != key->port)
    74			return (key->port > port) ? 1 : -1;
    75	
    76		if (family == AF_UNSPEC)
    77			return 0;
    78		if (key->family != family)
    79			return (key->family > family) ? 1 : -1;
    80	
    81		if (family == AF_INET) {
    82			if (key->addr.a4.s_addr == INADDR_ANY)
    83				return 0;
    84			if (addr->a4.s_addr == INADDR_ANY)
    85				return 0;
    86			return ipv4_prefix_cmp(&key->addr.a4, &addr->a4, prefixlen);
    87		} else {
    88			if (ipv6_addr_any(&key->addr.a6) || ipv6_addr_any(&addr->a6))
    89				return 0;
    90			if (ipv6_prefix_equal(&key->addr.a6, &addr->a6, prefixlen))
    91				return 0;
    92			return memcmp(&key->addr.a6, &addr->a6, prefixlen);
    93		}
    94	}
    95	
  > 96	int tcp_ao_key_cmp(const struct tcp_ao_key *key,
    97			   const union tcp_ao_addr *addr, u8 prefixlen,
    98			   int family, int sndid, int rcvid, u16 port)
    99	{
   100		if (family == AF_INET6 && ipv6_addr_v4mapped(&addr->a6)) {
   101			__be32 addr4 = addr->a6.s6_addr32[3];
   102	
   103			return __tcp_ao_key_cmp(key, (union tcp_ao_addr *)&addr4,
   104						prefixlen, AF_INET, sndid, rcvid, port);
   105		}
   106		return __tcp_ao_key_cmp(key, addr, prefixlen, family, sndid, rcvid, port);
   107	}
   108	
   109	struct tcp_ao_key *tcp_ao_do_lookup(const struct sock *sk,
   110					    const union tcp_ao_addr *addr,
   111					    int family, int sndid, int rcvid, u16 port)
   112	{
   113		struct tcp_ao_key *key;
   114		struct tcp_ao_info *ao;
   115	
   116		ao = rcu_dereference_check(tcp_sk(sk)->ao_info,
   117					   lockdep_sock_is_held(sk));
   118		if (!ao)
   119			return NULL;
   120	
   121		hlist_for_each_entry_rcu(key, &ao->head, node) {
   122			if (!tcp_ao_key_cmp(key, addr, key->prefixlen,
   123					    family, sndid, rcvid, port))
   124				return key;
   125		}
   126		return NULL;
   127	}
   128	EXPORT_SYMBOL(tcp_ao_do_lookup);
   129	
   130	static struct tcp_ao_info *tcp_ao_alloc_info(gfp_t flags,
   131			struct tcp_ao_info *cloned_from)
   132	{
   133		struct tcp_ao_info *ao;
   134	
   135		ao = kzalloc(sizeof(*ao), flags);
   136		if (!ao)
   137			return NULL;
   138		INIT_HLIST_HEAD(&ao->head);
   139	
   140		if (cloned_from)
   141			ao->ao_flags = cloned_from->ao_flags;
   142		return ao;
   143	}
   144	
 > 145	void tcp_ao_link_mkt(struct tcp_ao_info *ao, struct tcp_ao_key *mkt)
   146	{
   147		hlist_add_head_rcu(&mkt->node, &ao->head);
   148	}
   149	

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