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net: SO_RCVMARK socket option for SO_MARK with recvmsg() 

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
Show 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__))