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Message-ID: <20241210191309.8681-5-annaemesenyiri@gmail.com>
Date: Tue, 10 Dec 2024 20:13:09 +0100
From: Anna Emese Nyiri <annaemesenyiri@...il.com>
To: netdev@...r.kernel.org
Cc: fejes@....elte.hu,
edumazet@...gle.com,
kuba@...nel.org,
pabeni@...hat.com,
willemb@...gle.com,
idosch@...sch.org,
Anna Emese Nyiri <annaemesenyiri@...il.com>
Subject: [PATCH net-next v6 4/4] sock: Introduce SO_RCVPRIORITY socket option
Add new socket option, SO_RCVPRIORITY, to include SO_PRIORITY in the
ancillary data returned by recvmsg().
This is analogous to the existing support for SO_RCVMARK,
as implemented in commit <6fd1d51cfa253>
("net: SO_RCVMARK socket option for SO_MARK with recvmsg()").
Reviewed-by: Willem de Bruijn <willemb@...gle.com>
Suggested-by: Ferenc Fejes <fejes@....elte.hu>
Signed-off-by: Anna Emese Nyiri <annaemesenyiri@...il.com>
---
arch/alpha/include/uapi/asm/socket.h | 2 ++
arch/mips/include/uapi/asm/socket.h | 2 ++
arch/parisc/include/uapi/asm/socket.h | 2 ++
arch/sparc/include/uapi/asm/socket.h | 2 ++
include/net/sock.h | 4 +++-
include/uapi/asm-generic/socket.h | 2 ++
net/core/sock.c | 8 ++++++++
net/socket.c | 11 +++++++++++
tools/include/uapi/asm-generic/socket.h | 2 ++
9 files changed, 34 insertions(+), 1 deletion(-)
diff --git a/arch/alpha/include/uapi/asm/socket.h b/arch/alpha/include/uapi/asm/socket.h
index 302507bf9b5d..3df5f2dd4c0f 100644
--- a/arch/alpha/include/uapi/asm/socket.h
+++ b/arch/alpha/include/uapi/asm/socket.h
@@ -148,6 +148,8 @@
#define SCM_TS_OPT_ID 81
+#define SO_RCVPRIORITY 82
+
#if !defined(__KERNEL__)
#if __BITS_PER_LONG == 64
diff --git a/arch/mips/include/uapi/asm/socket.h b/arch/mips/include/uapi/asm/socket.h
index d118d4731580..22fa8f19924a 100644
--- a/arch/mips/include/uapi/asm/socket.h
+++ b/arch/mips/include/uapi/asm/socket.h
@@ -159,6 +159,8 @@
#define SCM_TS_OPT_ID 81
+#define SO_RCVPRIORITY 82
+
#if !defined(__KERNEL__)
#if __BITS_PER_LONG == 64
diff --git a/arch/parisc/include/uapi/asm/socket.h b/arch/parisc/include/uapi/asm/socket.h
index d268d69bfcd2..aa9cd4b951fe 100644
--- a/arch/parisc/include/uapi/asm/socket.h
+++ b/arch/parisc/include/uapi/asm/socket.h
@@ -140,6 +140,8 @@
#define SCM_TS_OPT_ID 0x404C
+#define SO_RCVPRIORITY 0x404D
+
#if !defined(__KERNEL__)
#if __BITS_PER_LONG == 64
diff --git a/arch/sparc/include/uapi/asm/socket.h b/arch/sparc/include/uapi/asm/socket.h
index 113cd9f353e3..5b464a568664 100644
--- a/arch/sparc/include/uapi/asm/socket.h
+++ b/arch/sparc/include/uapi/asm/socket.h
@@ -141,6 +141,8 @@
#define SCM_TS_OPT_ID 0x005a
+#define SO_RCVPRIORITY 0x005b
+
#if !defined(__KERNEL__)
diff --git a/include/net/sock.h b/include/net/sock.h
index 316a34d6c48b..d4bdd3286e03 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -953,6 +953,7 @@ enum sock_flags {
SOCK_XDP, /* XDP is attached */
SOCK_TSTAMP_NEW, /* Indicates 64 bit timestamps always */
SOCK_RCVMARK, /* Receive SO_MARK ancillary data with packet */
+ SOCK_RCVPRIORITY, /* Receive SO_PRIORITY ancillary data with packet */
};
#define SK_FLAGS_TIMESTAMP ((1UL << SOCK_TIMESTAMP) | (1UL << SOCK_TIMESTAMPING_RX_SOFTWARE))
@@ -2660,7 +2661,8 @@ static inline void sock_recv_cmsgs(struct msghdr *msg, struct sock *sk,
{
#define FLAGS_RECV_CMSGS ((1UL << SOCK_RXQ_OVFL) | \
(1UL << SOCK_RCVTSTAMP) | \
- (1UL << SOCK_RCVMARK))
+ (1UL << SOCK_RCVMARK) |\
+ (1UL << SOCK_RCVPRIORITY))
#define TSFLAGS_ANY (SOF_TIMESTAMPING_SOFTWARE | \
SOF_TIMESTAMPING_RAW_HARDWARE)
diff --git a/include/uapi/asm-generic/socket.h b/include/uapi/asm-generic/socket.h
index deacfd6dd197..aa5016ff3d91 100644
--- a/include/uapi/asm-generic/socket.h
+++ b/include/uapi/asm-generic/socket.h
@@ -143,6 +143,8 @@
#define SCM_TS_OPT_ID 81
+#define SO_RCVPRIORITY 82
+
#if !defined(__KERNEL__)
#if __BITS_PER_LONG == 64 || (defined(__x86_64__) && defined(__ILP32__))
diff --git a/net/core/sock.c b/net/core/sock.c
index a3d9941c1d32..f9f4d976141e 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1518,6 +1518,10 @@ int sk_setsockopt(struct sock *sk, int level, int optname,
case SO_RCVMARK:
sock_valbool_flag(sk, SOCK_RCVMARK, valbool);
break;
+
+ case SO_RCVPRIORITY:
+ sock_valbool_flag(sk, SOCK_RCVPRIORITY, valbool);
+ break;
case SO_RXQ_OVFL:
sock_valbool_flag(sk, SOCK_RXQ_OVFL, valbool);
@@ -1947,6 +1951,10 @@ int sk_getsockopt(struct sock *sk, int level, int optname,
v.val = sock_flag(sk, SOCK_RCVMARK);
break;
+ case SO_RCVPRIORITY:
+ v.val = sock_flag(sk, SOCK_RCVPRIORITY);
+ break;
+
case SO_RXQ_OVFL:
v.val = sock_flag(sk, SOCK_RXQ_OVFL);
break;
diff --git a/net/socket.c b/net/socket.c
index 9a117248f18f..79d08b734f7c 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -1008,12 +1008,23 @@ static void sock_recv_mark(struct msghdr *msg, struct sock *sk,
}
}
+static void sock_recv_priority(struct msghdr *msg, struct sock *sk,
+ struct sk_buff *skb)
+{
+ if (sock_flag(sk, SOCK_RCVPRIORITY) && skb) {
+ __u32 priority = skb->priority;
+
+ put_cmsg(msg, SOL_SOCKET, SO_PRIORITY, sizeof(__u32), &priority);
+ }
+}
+
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);
+ sock_recv_priority(msg, sk, skb);
}
EXPORT_SYMBOL_GPL(__sock_recv_cmsgs);
diff --git a/tools/include/uapi/asm-generic/socket.h b/tools/include/uapi/asm-generic/socket.h
index 281df9139d2b..ffff554a5230 100644
--- a/tools/include/uapi/asm-generic/socket.h
+++ b/tools/include/uapi/asm-generic/socket.h
@@ -126,6 +126,8 @@
#define SCM_TS_OPT_ID 78
+#define SO_RCVPRIORITY 79
+
#if !defined(__KERNEL__)
#if __BITS_PER_LONG == 64 || (defined(__x86_64__) && defined(__ILP32__))
--
2.43.0
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