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inet: preserve const qualifier in inet_sk()

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We can change inet_sk() to propagate const qualifier of its argument.

This should avoid some potential errors caused by accidental
(const -> not_const) promotion.

Other helpers like tcp_sk(), udp_sk(), raw_sk() will be handled
in separate patch series.

v2: use container_of_const() as advised by Jakub and Linus

Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/netdev/20230315142841.3a2ac99a@kernel.org/
Link: https://lore.kernel.org/netdev/CAHk-=wiOf12nrYEF2vJMcucKjWPN-Ns_SW9fA7LwST_2Dzp7rw@mail.gmail.com/
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2023-03-16 15:31:55 +00:00 committed by David S. Miller
parent 82b3297009
commit abc17a11ed
8 changed files with 12 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
include/net/inet_sock.h
View File

@ -305,10 +305,7 @@ static inline struct sock *skb_to_full_sk(const struct sk_buff *skb)
return sk_to_full_sk(skb->sk);
}
static inline struct inet_sock *inet_sk(const struct sock *sk)
{
return (struct inet_sock *)sk;
}
#define inet_sk(ptr) container_of_const(ptr, struct inet_sock, sk)
static inline void __inet_sk_copy_descendant(struct sock *sk_to,
const struct sock *sk_from,

4
include/trace/events/sock.h
View File

@ -158,7 +158,7 @@ TRACE_EVENT(inet_sock_set_state,
),
TP_fast_assign(
struct inet_sock *inet = inet_sk(sk);
const struct inet_sock *inet = inet_sk(sk);
struct in6_addr *pin6;
__be32 *p32;
@ -222,7 +222,7 @@ TRACE_EVENT(inet_sk_error_report,
),
TP_fast_assign(
struct inet_sock *inet = inet_sk(sk);
const struct inet_sock *inet = inet_sk(sk);
struct in6_addr *pin6;
__be32 *p32;

2
include/trace/events/tcp.h
View File

@ -67,7 +67,7 @@ DECLARE_EVENT_CLASS(tcp_event_sk_skb,
),
TP_fast_assign(
struct inet_sock *inet = inet_sk(sk);
const struct inet_sock *inet = inet_sk(sk);
__be32 *p32;
__entry->skbaddr = skb;

5
net/ipv4/ip_output.c
View File

@ -129,7 +129,8 @@ int ip_local_out(struct net *net, struct sock *sk, struct sk_buff *skb)
}
EXPORT_SYMBOL_GPL(ip_local_out);
static inline int ip_select_ttl(struct inet_sock *inet, struct dst_entry *dst)
static inline int ip_select_ttl(const struct inet_sock *inet,
const struct dst_entry *dst)
{
int ttl = inet->uc_ttl;
@ -146,7 +147,7 @@ int ip_build_and_send_pkt(struct sk_buff *skb, const struct sock *sk,
__be32 saddr, __be32 daddr, struct ip_options_rcu *opt,
u8 tos)
{
struct inet_sock *inet = inet_sk(sk);
const struct inet_sock *inet = inet_sk(sk);
struct rtable *rt = skb_rtable(skb);
struct net *net = sock_net(sk);
struct iphdr *iph;

2
net/ipv6/ping.c
View File

@ -237,7 +237,7 @@ static int ping_v6_seq_show(struct seq_file *seq, void *v)
seq_puts(seq, IPV6_SEQ_DGRAM_HEADER);
} else {
int bucket = ((struct ping_iter_state *) seq->private)->bucket;
struct inet_sock *inet = inet_sk(v);
struct inet_sock *inet = inet_sk((struct sock *)v);
__u16 srcp = ntohs(inet->inet_sport);
__u16 destp = ntohs(inet->inet_dport);
ip6_dgram_sock_seq_show(seq, v, srcp, destp, bucket);

2
net/ipv6/udp.c
View File

@ -1708,7 +1708,7 @@ int udp6_seq_show(struct seq_file *seq, void *v)
seq_puts(seq, IPV6_SEQ_DGRAM_HEADER);
} else {
int bucket = ((struct udp_iter_state *)seq->private)->bucket;
struct inet_sock *inet = inet_sk(v);
const struct inet_sock *inet = inet_sk((const struct sock *)v);
__u16 srcp = ntohs(inet->inet_sport);
__u16 destp = ntohs(inet->inet_dport);
__ip6_dgram_sock_seq_show(seq, v, srcp, destp,

2
net/mptcp/sockopt.c
View File

@ -1046,7 +1046,7 @@ static int mptcp_getsockopt_tcpinfo(struct mptcp_sock *msk, char __user *optval,
static void mptcp_get_sub_addrs(const struct sock *sk, struct mptcp_subflow_addrs *a)
{
struct inet_sock *inet = inet_sk(sk);
const struct inet_sock *inet = inet_sk(sk);
memset(a, 0, sizeof(*a));

4
security/lsm_audit.c
View File

@ -317,7 +317,7 @@ static void dump_common_audit_data(struct audit_buffer *ab,
switch (sk->sk_family) {
case AF_INET: {
struct inet_sock *inet = inet_sk(sk);
const struct inet_sock *inet = inet_sk(sk);
print_ipv4_addr(ab, inet->inet_rcv_saddr,
inet->inet_sport,
@ -329,7 +329,7 @@ static void dump_common_audit_data(struct audit_buffer *ab,
}
#if IS_ENABLED(CONFIG_IPV6)
case AF_INET6: {
struct inet_sock *inet = inet_sk(sk);
const struct inet_sock *inet = inet_sk(sk);
print_ipv6_addr(ab, &sk->sk_v6_rcv_saddr,
inet->inet_sport,