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net: SO_RCVMARK socket option for SO_MARK with recvmsg()

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Adding a new socket option, SO_RCVMARK, to indicate that SO_MARK
should be included in the ancillary data returned by recvmsg().

Renamed the sock_recv_ts_and_drops() function to sock_recv_cmsgs().

Signed-off-by: Erin MacNeil <lnx.erin@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Acked-by: Marc Kleine-Budde <mkl@pengutronix.de>
Link: https://lore.kernel.org/r/20220427200259.2564-1-lnx.erin@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Erin MacNeil 2022-04-27 16:02:37 -04:00 committed by Jakub Kicinski
parent 0e55546b18
commit 6fd1d51cfa
23 changed files with 56 additions and 27 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

2
arch/alpha/include/uapi/asm/socket.h
View file

@ -135,6 +135,8 @@
#define SO_TXREHASH 74
#define SO_RCVMARK 75
#if !defined(__KERNEL__)
#if __BITS_PER_LONG == 64

2
arch/mips/include/uapi/asm/socket.h
View file

@ -146,6 +146,8 @@
#define SO_TXREHASH 74
#define SO_RCVMARK 75
#if !defined(__KERNEL__)
#if __BITS_PER_LONG == 64

2
arch/parisc/include/uapi/asm/socket.h
View file

@ -127,6 +127,8 @@
#define SO_TXREHASH 0x4048
#define SO_RCVMARK 0x4049
#if !defined(__KERNEL__)
#if __BITS_PER_LONG == 64

1
arch/sparc/include/uapi/asm/socket.h
View file

@ -128,6 +128,7 @@
#define SO_TXREHASH 0x0053
#define SO_RCVMARK 0x0054
#if !defined(__KERNEL__)

18
include/net/sock.h
View file

@ -893,6 +893,7 @@ enum sock_flags {
SOCK_TXTIME,
SOCK_XDP, /* XDP is attached */
SOCK_TSTAMP_NEW, /* Indicates 64 bit timestamps always */
SOCK_RCVMARK, /* Receive SO_MARK ancillary data with packet */
};
#define SK_FLAGS_TIMESTAMP ((1UL << SOCK_TIMESTAMP) | (1UL << SOCK_TIMESTAMPING_RX_SOFTWARE))
@ -2647,20 +2648,21 @@ sock_recv_timestamp(struct msghdr *msg, struct sock *sk, struct sk_buff *skb)
__sock_recv_wifi_status(msg, sk, skb);
}
void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk,
struct sk_buff *skb);
void __sock_recv_cmsgs(struct msghdr *msg, struct sock *sk,
struct sk_buff *skb);
#define SK_DEFAULT_STAMP (-1L * NSEC_PER_SEC)
static inline void sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk,
struct sk_buff *skb)
static inline void sock_recv_cmsgs(struct msghdr *msg, struct sock *sk,
struct sk_buff *skb)
{
#define FLAGS_TS_OR_DROPS ((1UL << SOCK_RXQ_OVFL) | \
(1UL << SOCK_RCVTSTAMP))
#define FLAGS_RECV_CMSGS ((1UL << SOCK_RXQ_OVFL) | \
(1UL << SOCK_RCVTSTAMP) | \
(1UL << SOCK_RCVMARK))
#define TSFLAGS_ANY (SOF_TIMESTAMPING_SOFTWARE | \
SOF_TIMESTAMPING_RAW_HARDWARE)
if (sk->sk_flags & FLAGS_TS_OR_DROPS || sk->sk_tsflags & TSFLAGS_ANY)
__sock_recv_ts_and_drops(msg, sk, skb);
if (sk->sk_flags & FLAGS_RECV_CMSGS || sk->sk_tsflags & TSFLAGS_ANY)
__sock_recv_cmsgs(msg, sk, skb);
else if (unlikely(sock_flag(sk, SOCK_TIMESTAMP)))
sock_write_timestamp(sk, skb->tstamp);
else if (unlikely(sk->sk_stamp == SK_DEFAULT_STAMP))

2
include/uapi/asm-generic/socket.h
View file

@ -130,6 +130,8 @@
#define SO_TXREHASH 74
#define SO_RCVMARK 75
#if !defined(__KERNEL__)
#if __BITS_PER_LONG == 64 || (defined(__x86_64__) && defined(__ILP32__))

2
net/atm/common.c
View file

@ -553,7 +553,7 @@ int vcc_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
error = skb_copy_datagram_msg(skb, 0, msg, copied);
if (error)
return error;
sock_recv_ts_and_drops(msg, sk, skb);
sock_recv_cmsgs(msg, sk, skb);
if (!(flags & MSG_PEEK)) {
pr_debug("%d -= %d\n", atomic_read(&sk->sk_rmem_alloc),

4
net/bluetooth/af_bluetooth.c
View file

@ -280,7 +280,7 @@ int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
skb_reset_transport_header(skb);
err = skb_copy_datagram_msg(skb, 0, msg, copied);
if (err == 0) {
sock_recv_ts_and_drops(msg, sk, skb);
sock_recv_cmsgs(msg, sk, skb);
if (msg->msg_name && bt_sk(sk)->skb_msg_name)
bt_sk(sk)->skb_msg_name(skb, msg->msg_name,
@ -384,7 +384,7 @@ int bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg,
copied += chunk;
size -= chunk;
sock_recv_ts_and_drops(msg, sk, skb);
sock_recv_cmsgs(msg, sk, skb);
if (!(flags & MSG_PEEK)) {
int skb_len = skb_headlen(skb);

2
net/can/bcm.c
View file

@ -1647,7 +1647,7 @@ static int bcm_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
return err;
}
sock_recv_ts_and_drops(msg, sk, skb);
sock_recv_cmsgs(msg, sk, skb);
if (msg->msg_name) {
__sockaddr_check_size(BCM_MIN_NAMELEN);

2
net/can/j1939/socket.c
View file

@ -841,7 +841,7 @@ static int j1939_sk_recvmsg(struct socket *sock, struct msghdr *msg,
paddr->can_addr.j1939.pgn = skcb->addr.pgn;
}
sock_recv_ts_and_drops(msg, sk, skb);
sock_recv_cmsgs(msg, sk, skb);
msg->msg_flags |= skcb->msg_flags;
skb_free_datagram(sk, skb);

2
net/can/raw.c
View file

@ -866,7 +866,7 @@ static int raw_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
return err;
}
sock_recv_ts_and_drops(msg, sk, skb);
sock_recv_cmsgs(msg, sk, skb);
if (msg->msg_name) {
__sockaddr_check_size(RAW_MIN_NAMELEN);

7
net/core/sock.c
View file

@ -1311,6 +1311,9 @@ int sock_setsockopt(struct socket *sock, int level, int optname,
__sock_set_mark(sk, val);
break;
case SO_RCVMARK:
sock_valbool_flag(sk, SOCK_RCVMARK, valbool);
break;
case SO_RXQ_OVFL:
sock_valbool_flag(sk, SOCK_RXQ_OVFL, valbool);
@ -1737,6 +1740,10 @@ int sock_getsockopt(struct socket *sock, int level, int optname,
v.val = sk->sk_mark;
break;
case SO_RCVMARK:
v.val = sock_flag(sk, SOCK_RCVMARK);
break;
case SO_RXQ_OVFL:
v.val = sock_flag(sk, SOCK_RXQ_OVFL);
break;

4
net/ieee802154/socket.c
View file

@ -328,7 +328,7 @@ static int raw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
if (err)
goto done;
sock_recv_ts_and_drops(msg, sk, skb);
sock_recv_cmsgs(msg, sk, skb);
if (flags & MSG_TRUNC)
copied = skb->len;
@ -718,7 +718,7 @@ static int dgram_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
if (err)
goto done;
sock_recv_ts_and_drops(msg, sk, skb);
sock_recv_cmsgs(msg, sk, skb);
if (saddr) {
/* Clear the implicit padding in struct sockaddr_ieee802154

2
net/ipv4/raw.c
View file

@ -783,7 +783,7 @@ static int raw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
if (err)
goto done;
sock_recv_ts_and_drops(msg, sk, skb);
sock_recv_cmsgs(msg, sk, skb);
/* Copy the address. */
if (sin) {

2
net/ipv4/udp.c
View file

@ -1909,7 +1909,7 @@ int udp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int flags,
UDP_INC_STATS(sock_net(sk),
UDP_MIB_INDATAGRAMS, is_udplite);
sock_recv_ts_and_drops(msg, sk, skb);
sock_recv_cmsgs(msg, sk, skb);
/* Copy the address. */
if (sin) {

2
net/ipv6/raw.c
View file

@ -512,7 +512,7 @@ static int rawv6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
*addr_len = sizeof(*sin6);
}
sock_recv_ts_and_drops(msg, sk, skb);
sock_recv_cmsgs(msg, sk, skb);
if (np->rxopt.all)
ip6_datagram_recv_ctl(sk, msg, skb);

2
net/ipv6/udp.c
View file

@ -391,7 +391,7 @@ int udpv6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
if (!peeking)
SNMP_INC_STATS(mib, UDP_MIB_INDATAGRAMS);
sock_recv_ts_and_drops(msg, sk, skb);
sock_recv_cmsgs(msg, sk, skb);
/* Copy the address. */
if (msg->msg_name) {

2
net/key/af_key.c
View file

@ -3711,7 +3711,7 @@ static int pfkey_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
if (err)
goto out_free;
sock_recv_ts_and_drops(msg, sk, skb);
sock_recv_cmsgs(msg, sk, skb);
err = (flags & MSG_TRUNC) ? skb->len : copied;

2
net/mctp/af_mctp.c
View file

@ -238,7 +238,7 @@ static int mctp_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
if (rc < 0)
goto out_free;
sock_recv_ts_and_drops(msg, sk, skb);
sock_recv_cmsgs(msg, sk, skb);
if (addr) {
struct mctp_skb_cb *cb = mctp_cb(skb);

2
net/packet/af_packet.c
View file

@ -3477,7 +3477,7 @@ static int packet_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
sll->sll_protocol = skb->protocol;
}
sock_recv_ts_and_drops(msg, sk, skb);
sock_recv_cmsgs(msg, sk, skb);
if (msg->msg_name) {
const size_t max_len = min(sizeof(skb->cb),

2
net/sctp/socket.c
View file

@ -2128,7 +2128,7 @@ static int sctp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
head_skb = event->chunk->head_skb;
else
head_skb = skb;
sock_recv_ts_and_drops(msg, sk, head_skb);
sock_recv_cmsgs(msg, sk, head_skb);
if (sctp_ulpevent_is_notification(event)) {
msg->msg_flags |= MSG_NOTIFICATION;
sp->pf->event_msgname(event, msg->msg_name, addr_len);

15
net/socket.c
View file

@ -930,13 +930,22 @@ static inline void sock_recv_drops(struct msghdr *msg, struct sock *sk,
sizeof(__u32), &SOCK_SKB_CB(skb)->dropcount);
}
void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk,
struct sk_buff *skb)
static void sock_recv_mark(struct msghdr *msg, struct sock *sk,
struct sk_buff *skb)
{
if (sock_flag(sk, SOCK_RCVMARK) && skb)
put_cmsg(msg, SOL_SOCKET, SO_MARK, sizeof(__u32),
&skb->mark);
}
void __sock_recv_cmsgs(struct msghdr *msg, struct sock *sk,
struct sk_buff *skb)
{
sock_recv_timestamp(msg, sk, skb);
sock_recv_drops(msg, sk, skb);
sock_recv_mark(msg, sk, skb);
}
EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops);
EXPORT_SYMBOL_GPL(__sock_recv_cmsgs);
INDIRECT_CALLABLE_DECLARE(int inet_recvmsg(struct socket *, struct msghdr *,
size_t, int));

2
tools/include/uapi/asm-generic/socket.h
View file

@ -119,6 +119,8 @@
#define SO_DETACH_REUSEPORT_BPF 68
#define SO_RCVMARK 75
#if !defined(__KERNEL__)
#if __BITS_PER_LONG == 64 || (defined(__x86_64__) && defined(__ILP32__))