| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <20200513062649.2100053-3-hch@lst.de>
Date: Wed, 13 May 2020 08:26:17 +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 02/33] net: add sock_set_linger
Add a helper to directly set the SO_LINGER sockopt from kernel space
without going through a fake uaccess.
Signed-off-by: Christoph Hellwig <hch@....de>
---
drivers/nvme/host/tcp.c | 9 +--------
drivers/nvme/target/tcp.c | 6 +-----
include/net/sock.h | 1 +
net/core/sock.c | 36 +++++++++++++++++++++++++-----------
net/rds/tcp_listen.c | 8 +-------
net/sunrpc/svcsock.c | 12 ++----------
6 files changed, 31 insertions(+), 41 deletions(-)
diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c
index c15a92163c1f7..5cacb61c73229 100644
--- a/drivers/nvme/host/tcp.c
+++ b/drivers/nvme/host/tcp.c
@@ -1313,7 +1313,6 @@ static int nvme_tcp_alloc_queue(struct nvme_ctrl *nctrl,
{
struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(nctrl);
struct nvme_tcp_queue *queue = &ctrl->queues[qid];
- struct linger sol = { .l_onoff = 1, .l_linger = 0 };
int ret, opt, rcv_pdu_size;
queue->ctrl = ctrl;
@@ -1361,13 +1360,7 @@ static int nvme_tcp_alloc_queue(struct nvme_ctrl *nctrl,
* close. This is done to prevent stale data from being sent should
* the network connection be restored before TCP times out.
*/
- ret = kernel_setsockopt(queue->sock, SOL_SOCKET, SO_LINGER,
- (char *)&sol, sizeof(sol));
- if (ret) {
- dev_err(nctrl->device,
- "failed to set SO_LINGER sock opt %d\n", ret);
- goto err_sock;
- }
+ sock_set_linger(queue->sock->sk, true, 0);
if (so_priority > 0) {
ret = kernel_setsockopt(queue->sock, SOL_SOCKET, SO_PRIORITY,
diff --git a/drivers/nvme/target/tcp.c b/drivers/nvme/target/tcp.c
index 791aa32beeb98..87aba417189d2 100644
--- a/drivers/nvme/target/tcp.c
+++ b/drivers/nvme/target/tcp.c
@@ -1429,7 +1429,6 @@ static int nvmet_tcp_set_queue_sock(struct nvmet_tcp_queue *queue)
{
struct socket *sock = queue->sock;
struct inet_sock *inet = inet_sk(sock->sk);
- struct linger sol = { .l_onoff = 1, .l_linger = 0 };
int ret;
ret = kernel_getsockname(sock,
@@ -1447,10 +1446,7 @@ static int nvmet_tcp_set_queue_sock(struct nvmet_tcp_queue *queue)
* close. This is done to prevent stale data from being sent should
* the network connection be restored before TCP times out.
*/
- ret = kernel_setsockopt(sock, SOL_SOCKET, SO_LINGER,
- (char *)&sol, sizeof(sol));
- if (ret)
- return ret;
+ sock_set_linger(sock->sk, true, 0);
if (so_priority > 0) {
ret = kernel_setsockopt(sock, SOL_SOCKET, SO_PRIORITY,
diff --git a/include/net/sock.h b/include/net/sock.h
index e801a147ad746..60890fb47fbc0 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -2688,5 +2688,6 @@ 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);
#endif /* _SOCK_H */
diff --git a/net/core/sock.c b/net/core/sock.c
index ff4faa3e68ac4..cbc5104ca3515 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -720,6 +720,30 @@ void sock_set_reuseaddr(struct sock *sk, unsigned char reuse)
}
EXPORT_SYMBOL(sock_set_reuseaddr);
+static void __sock_set_linger(struct sock *sk, bool onoff, unsigned int linger)
+{
+ if (!onoff) {
+ sock_reset_flag(sk, SOCK_LINGER);
+ return;
+ }
+
+#if (BITS_PER_LONG == 32)
+ if (linger >= MAX_SCHEDULE_TIMEOUT / HZ)
+ sk->sk_lingertime = MAX_SCHEDULE_TIMEOUT;
+ else
+#endif
+ sk->sk_lingertime = linger * HZ;
+ sock_set_flag(sk, SOCK_LINGER);
+}
+
+void sock_set_linger(struct sock *sk, bool onoff, unsigned int linger)
+{
+ lock_sock(sk);
+ __sock_set_linger(sk, onoff, linger);
+ release_sock(sk);
+}
+EXPORT_SYMBOL(sock_set_linger);
+
/*
* This is meant for all protocols to use and covers goings on
* at the socket level. Everything here is generic.
@@ -886,17 +910,7 @@ int sock_setsockopt(struct socket *sock, int level, int optname,
ret = -EFAULT;
break;
}
- if (!ling.l_onoff)
- sock_reset_flag(sk, SOCK_LINGER);
- else {
-#if (BITS_PER_LONG == 32)
- if ((unsigned int)ling.l_linger >= MAX_SCHEDULE_TIMEOUT/HZ)
- sk->sk_lingertime = MAX_SCHEDULE_TIMEOUT;
- else
-#endif
- sk->sk_lingertime = (unsigned int)ling.l_linger * HZ;
- sock_set_flag(sk, SOCK_LINGER);
- }
+ __sock_set_linger(sk, ling.l_onoff, ling.l_linger);
break;
case SO_BSDCOMPAT:
diff --git a/net/rds/tcp_listen.c b/net/rds/tcp_listen.c
index 810a3a49e9474..96f7538e5fa8d 100644
--- a/net/rds/tcp_listen.c
+++ b/net/rds/tcp_listen.c
@@ -113,13 +113,7 @@ struct rds_tcp_connection *rds_tcp_accept_one_path(struct rds_connection *conn)
void rds_tcp_set_linger(struct socket *sock)
{
- struct linger no_linger = {
- .l_onoff = 1,
- .l_linger = 0,
- };
-
- kernel_setsockopt(sock, SOL_SOCKET, SO_LINGER,
- (char *)&no_linger, sizeof(no_linger));
+ sock_set_linger(sock->sk, true, 0);
}
int rds_tcp_accept_one(struct socket *sock)
diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index 023514e392b31..0f6b78d0e6170 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -323,17 +323,9 @@ static int svc_tcp_has_wspace(struct svc_xprt *xprt)
static void svc_tcp_kill_temp_xprt(struct svc_xprt *xprt)
{
- struct svc_sock *svsk;
- struct socket *sock;
- struct linger no_linger = {
- .l_onoff = 1,
- .l_linger = 0,
- };
+ struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt);
- svsk = container_of(xprt, struct svc_sock, sk_xprt);
- sock = svsk->sk_sock;
- kernel_setsockopt(sock, SOL_SOCKET, SO_LINGER,
- (char *)&no_linger, sizeof(no_linger));
+ sock_set_linger(svsk->sk_sock->sk, true, 0);
}
/*
--
2.26.2
Powered by blists - more mailing lists