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Message-Id: <20200513062649.2100053-4-hch@lst.de>
Date: Wed, 13 May 2020 08:26:18 +0200
From: Christoph Hellwig <hch@....de>
To: "David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>
Cc: Eric Dumazet <edumazet@...gle.com>,
Alexey Kuznetsov <kuznet@....inr.ac.ru>,
Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
Vlad Yasevich <vyasevich@...il.com>,
Neil Horman <nhorman@...driver.com>,
Marcelo Ricardo Leitner <marcelo.leitner@...il.com>,
Jon Maloy <jmaloy@...hat.com>,
Ying Xue <ying.xue@...driver.com>, drbd-dev@...ts.linbit.com,
linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-rdma@...r.kernel.org, linux-nvme@...ts.infradead.org,
target-devel@...r.kernel.org, linux-afs@...ts.infradead.org,
linux-cifs@...r.kernel.org, cluster-devel@...hat.com,
ocfs2-devel@....oracle.com, netdev@...r.kernel.org,
linux-sctp@...r.kernel.org, ceph-devel@...r.kernel.org,
rds-devel@....oracle.com, linux-nfs@...r.kernel.org
Subject: [PATCH 03/33] net: add sock_set_priority
Add a helper to directly set the SO_PRIORITY sockopt from kernel space
without going through a fake uaccess.
Signed-off-by: Christoph Hellwig <hch@....de>
---
drivers/nvme/host/tcp.c | 12 ++----------
drivers/nvme/target/tcp.c | 18 ++++--------------
include/net/sock.h | 1 +
net/core/sock.c | 8 ++++++++
4 files changed, 15 insertions(+), 24 deletions(-)
diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c
index 5cacb61c73229..cd6a8fc14a139 100644
--- a/drivers/nvme/host/tcp.c
+++ b/drivers/nvme/host/tcp.c
@@ -1362,16 +1362,8 @@ static int nvme_tcp_alloc_queue(struct nvme_ctrl *nctrl,
*/
sock_set_linger(queue->sock->sk, true, 0);
- if (so_priority > 0) {
- ret = kernel_setsockopt(queue->sock, SOL_SOCKET, SO_PRIORITY,
- (char *)&so_priority, sizeof(so_priority));
- if (ret) {
- dev_err(ctrl->ctrl.device,
- "failed to set SO_PRIORITY sock opt, ret %d\n",
- ret);
- goto err_sock;
- }
- }
+ if (so_priority > 0)
+ sock_set_priority(queue->sock->sk, so_priority);
/* Set socket type of service */
if (nctrl->opts->tos >= 0) {
diff --git a/drivers/nvme/target/tcp.c b/drivers/nvme/target/tcp.c
index 87aba417189d2..778c1ce3137b7 100644
--- a/drivers/nvme/target/tcp.c
+++ b/drivers/nvme/target/tcp.c
@@ -1448,12 +1448,8 @@ static int nvmet_tcp_set_queue_sock(struct nvmet_tcp_queue *queue)
*/
sock_set_linger(sock->sk, true, 0);
- if (so_priority > 0) {
- ret = kernel_setsockopt(sock, SOL_SOCKET, SO_PRIORITY,
- (char *)&so_priority, sizeof(so_priority));
- if (ret)
- return ret;
- }
+ if (so_priority > 0)
+ sock_set_priority(sock->sk, so_priority);
/* Set socket type of service */
if (inet->rcv_tos > 0) {
@@ -1638,14 +1634,8 @@ static int nvmet_tcp_add_port(struct nvmet_port *nport)
goto err_sock;
}
- if (so_priority > 0) {
- ret = kernel_setsockopt(port->sock, SOL_SOCKET, SO_PRIORITY,
- (char *)&so_priority, sizeof(so_priority));
- if (ret) {
- pr_err("failed to set SO_PRIORITY sock opt %d\n", ret);
- goto err_sock;
- }
- }
+ if (so_priority > 0)
+ sock_set_priority(port->sock->sk, so_priority);
ret = kernel_bind(port->sock, (struct sockaddr *)&port->addr,
sizeof(port->addr));
diff --git a/include/net/sock.h b/include/net/sock.h
index 60890fb47fbc0..cce11782dc295 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -2689,5 +2689,6 @@ static inline bool sk_dev_equal_l3scope(struct sock *sk, int dif)
void sock_def_readable(struct sock *sk);
void sock_set_reuseaddr(struct sock *sk, unsigned char reuse);
void sock_set_linger(struct sock *sk, bool onoff, unsigned int linger);
+void sock_set_priority(struct sock *sk, u32 priority);
#endif /* _SOCK_H */
diff --git a/net/core/sock.c b/net/core/sock.c
index cbc5104ca3515..e9f1e2247b004 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -744,6 +744,14 @@ void sock_set_linger(struct sock *sk, bool onoff, unsigned int linger)
}
EXPORT_SYMBOL(sock_set_linger);
+void sock_set_priority(struct sock *sk, u32 priority)
+{
+ lock_sock(sk);
+ sk->sk_priority = priority;
+ release_sock(sk);
+}
+EXPORT_SYMBOL(sock_set_priority);
+
/*
* This is meant for all protocols to use and covers goings on
* at the socket level. Everything here is generic.
--
2.26.2
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