From: Christoph Hellwig <hch@lst.de>
To: "David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>
Cc: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>,
Eric Dumazet <edumazet@google.com>,
linux-nvme@lists.infradead.org, linux-sctp@vger.kernel.org,
target-devel@vger.kernel.org, linux-afs@lists.infradead.org,
linux-cifs@vger.kernel.org, rds-devel@oss.oracle.com,
linux-rdma@vger.kernel.org, cluster-devel@redhat.com,
Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>,
linux-block@vger.kernel.org, drbd-dev@tron.linbit.com,
ceph-devel@vger.kernel.org, linux-nfs@vger.kernel.org,
Neil Horman <nhorman@tuxdriver.com>,
Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>,
netdev@vger.kernel.org, Vlad Yasevich <vyasevich@gmail.com>,
linux-kernel@vger.kernel.org, Jon Maloy <jmaloy@redhat.com>,
Ying Xue <ying.xue@windriver.com>,
ocfs2-devel@oss.oracle.com
Subject: [PATCH 32/33] sctp: add sctp_sock_get_primary_addr
Date: Wed, 13 May 2020 08:26:47 +0200 [thread overview]
Message-ID: <20200513062649.2100053-33-hch@lst.de> (raw)
In-Reply-To: <20200513062649.2100053-1-hch@lst.de>
Add a helper to directly get the SCTP_PRIMARY_ADDR sockopt from kernel
space without going through a fake uaccess.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
fs/dlm/lowcomms.c | 11 +++-----
include/net/sctp/sctp.h | 1 +
net/sctp/socket.c | 57 +++++++++++++++++++++++++----------------
3 files changed, 39 insertions(+), 30 deletions(-)
diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
index 6fa45365666a8..46d2d71b62c57 100644
--- a/fs/dlm/lowcomms.c
+++ b/fs/dlm/lowcomms.c
@@ -855,10 +855,9 @@ static int tcp_accept_from_sock(struct connection *con)
static int sctp_accept_from_sock(struct connection *con)
{
/* Check that the new node is in the lockspace */
- struct sctp_prim prim;
+ struct sctp_prim prim = { };
int nodeid;
- int prim_len, ret;
- int addr_len;
+ int addr_len, ret;
struct connection *newcon;
struct connection *addcon;
struct socket *newsock;
@@ -876,11 +875,7 @@ static int sctp_accept_from_sock(struct connection *con)
if (ret < 0)
goto accept_err;
- memset(&prim, 0, sizeof(struct sctp_prim));
- prim_len = sizeof(struct sctp_prim);
-
- ret = kernel_getsockopt(newsock, IPPROTO_SCTP, SCTP_PRIMARY_ADDR,
- (char *)&prim, &prim_len);
+ ret = sctp_sock_get_primary_addr(con->sock->sk, &prim);
if (ret < 0) {
log_print("getsockopt/sctp_primary_addr failed: %d", ret);
goto accept_err;
diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h
index b505fa082f254..c98b1d14db853 100644
--- a/include/net/sctp/sctp.h
+++ b/include/net/sctp/sctp.h
@@ -618,5 +618,6 @@ static inline bool sctp_newsk_ready(const struct sock *sk)
int sctp_setsockopt_bindx(struct sock *sk, struct sockaddr *kaddrs,
int addrs_size, int op);
void sctp_sock_set_nodelay(struct sock *sk, bool val);
+int sctp_sock_get_primary_addr(struct sock *sk, struct sctp_prim *prim);
#endif /* __net_sctp_h__ */
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 64c395f7a86d5..39bf8090dbe1e 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -6411,6 +6411,35 @@ static int sctp_getsockopt_local_addrs(struct sock *sk, int len,
return err;
}
+static int __sctp_sock_get_primary_addr(struct sock *sk, struct sctp_prim *prim)
+{
+ struct sctp_association *asoc;
+
+ asoc = sctp_id2assoc(sk, prim->ssp_assoc_id);
+ if (!asoc)
+ return -EINVAL;
+ if (!asoc->peer.primary_path)
+ return -ENOTCONN;
+
+ memcpy(&prim->ssp_addr, &asoc->peer.primary_path->ipaddr,
+ asoc->peer.primary_path->af_specific->sockaddr_len);
+
+ sctp_get_pf_specific(sk->sk_family)->addr_to_user(sctp_sk(sk),
+ (union sctp_addr *)&prim->ssp_addr);
+ return 0;
+}
+
+int sctp_sock_get_primary_addr(struct sock *sk, struct sctp_prim *prim)
+{
+ int ret;
+
+ lock_sock(sk);
+ ret = __sctp_sock_get_primary_addr(sk, prim);
+ release_sock(sk);
+ return ret;
+}
+EXPORT_SYMBOL(sctp_sock_get_primary_addr);
+
/* 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR)
*
* Requests that the local SCTP stack use the enclosed peer address as
@@ -6421,35 +6450,19 @@ static int sctp_getsockopt_primary_addr(struct sock *sk, int len,
char __user *optval, int __user *optlen)
{
struct sctp_prim prim;
- struct sctp_association *asoc;
- struct sctp_sock *sp = sctp_sk(sk);
+ int ret;
if (len < sizeof(struct sctp_prim))
return -EINVAL;
-
- len = sizeof(struct sctp_prim);
-
- if (copy_from_user(&prim, optval, len))
+ if (copy_from_user(&prim, optval, sizeof(struct sctp_prim)))
return -EFAULT;
- asoc = sctp_id2assoc(sk, prim.ssp_assoc_id);
- if (!asoc)
- return -EINVAL;
-
- if (!asoc->peer.primary_path)
- return -ENOTCONN;
-
- memcpy(&prim.ssp_addr, &asoc->peer.primary_path->ipaddr,
- asoc->peer.primary_path->af_specific->sockaddr_len);
-
- sctp_get_pf_specific(sk->sk_family)->addr_to_user(sp,
- (union sctp_addr *)&prim.ssp_addr);
+ ret = __sctp_sock_get_primary_addr(sk, &prim);
+ if (ret)
+ return ret;
- if (put_user(len, optlen))
+ if (put_user(len, optlen) || copy_to_user(optval, &prim, len))
return -EFAULT;
- if (copy_to_user(optval, &prim, len))
- return -EFAULT;
-
return 0;
}
--
2.26.2
next prev parent reply other threads:[~2020-05-13 6:26 UTC|newest]
Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-13 6:26 remove kernel_setsockopt and kernel_getsockopt Christoph Hellwig
2020-05-13 6:26 ` [PATCH 01/33] net: add sock_set_reuseaddr Christoph Hellwig
2020-05-13 6:26 ` [PATCH 03/33] net: add sock_set_priority Christoph Hellwig
2020-05-13 6:26 ` [PATCH 04/33] net: add sock_set_sndtimeo Christoph Hellwig
2020-05-13 6:26 ` [PATCH 05/33] net: add sock_bindtoindex Christoph Hellwig
2020-05-13 6:26 ` [PATCH 06/33] net: add sock_set_timestamps Christoph Hellwig
2020-05-13 6:26 ` [PATCH 07/33] net: add sock_set_keepalive Christoph Hellwig
2020-05-13 6:26 ` [PATCH 08/33] net: add sock_set_rcvbuf Christoph Hellwig
2020-05-13 6:26 ` [PATCH 09/33] net: add sock_set_reuseport Christoph Hellwig
2020-05-13 6:26 ` [PATCH 10/33] tcp: add tcp_sock_set_cork Christoph Hellwig
2020-05-13 6:26 ` [PATCH 11/33] tcp: tcp_sock_set_nodelay Christoph Hellwig
2020-05-13 12:51 ` Jason Gunthorpe
2020-05-13 6:26 ` [PATCH 12/33] tcp: add tcp_sock_set_quickack Christoph Hellwig
2020-05-13 6:26 ` [PATCH 13/33] tcp: add tcp_sock_set_syncnt Christoph Hellwig
[not found] ` <20200513062649.2100053-1-hch-jcswGhMUV9g@public.gmane.org>
2020-05-13 6:26 ` [PATCH 02/33] net: add sock_set_linger Christoph Hellwig
2020-05-13 6:26 ` [PATCH 14/33] tcp: add tcp_sock_set_user_timeout Christoph Hellwig
2020-05-13 6:26 ` [PATCH 15/33] tcp: add tcp_sock_set_keepidle Christoph Hellwig
2020-05-13 6:26 ` [PATCH 16/33] tcp: add tcp_sock_set_keepintvl Christoph Hellwig
2020-05-13 6:26 ` [PATCH 17/33] tcp: add tcp_sock_set_keepcnt Christoph Hellwig
2020-05-13 6:26 ` [PATCH 18/33] ipv4: add ip_sock_set_tos Christoph Hellwig
2020-05-13 6:26 ` [PATCH 19/33] ipv4: add ip_sock_set_freebind Christoph Hellwig
2020-05-13 6:26 ` [PATCH 20/33] ipv4: add ip_sock_set_recverr Christoph Hellwig
2020-05-13 21:00 ` Joe Perches
2020-05-14 10:30 ` Christoph Hellwig
2020-05-14 11:51 ` Joe Perches
[not found] ` <9992a1fe768a0b1e9bb9470d2728ba25dbe042db.camel-6d6DIl74uiNBDgjK7y7TUQ@public.gmane.org>
2020-05-20 14:18 ` Christoph Hellwig
2020-05-13 6:26 ` [PATCH 21/33] ipv4: add ip_sock_set_mtu_discover Christoph Hellwig
2020-05-13 6:26 ` [PATCH 22/33] ipv6: add ip6_sock_set_v6only Christoph Hellwig
2020-05-13 6:26 ` [PATCH 23/33] ipv6: add ip6_sock_set_recverr Christoph Hellwig
2020-05-13 6:26 ` [PATCH 24/33] ipv6: add ip6_sock_set_addr_preferences Christoph Hellwig
2020-05-13 6:26 ` [PATCH 25/33] ipv6: add ip6_sock_set_recvpktinfo Christoph Hellwig
2020-05-13 6:26 ` [PATCH 26/33] sctp: lift copying in addrs into sctp_setsockopt Christoph Hellwig
2020-05-13 6:26 ` [PATCH 27/33] sctp: export sctp_setsockopt_bindx Christoph Hellwig
2020-05-13 18:00 ` Marcelo Ricardo Leitner
2020-05-14 6:28 ` Christoph Hellwig
2020-05-14 8:23 ` David Laight
2020-05-14 10:40 ` is it ok to always pull in sctp for dlm, was: " Christoph Hellwig
2020-05-14 14:24 ` David Teigland
2020-05-15 15:20 ` David Howells
2020-05-15 15:24 ` Christoph Hellwig
2020-05-16 15:21 ` David Laight
[not found] ` <129070.1589556002-S6HVgzuS8uM4Awkfq6JHfwNdhmdF6hFW@public.gmane.org>
2020-05-16 15:11 ` David Laight
2020-05-16 15:36 ` [Ocfs2-devel] " Matthew Wilcox
2020-05-17 8:48 ` David Laight
2020-05-13 6:26 ` [PATCH 28/33] sctp: add sctp_sock_set_nodelay Christoph Hellwig
2020-05-13 6:26 ` [PATCH 29/33] rxrpc_sock_set_min_security_level Christoph Hellwig
2020-05-13 6:26 ` [PATCH 30/33] tipc: call tsk_set_importance from tipc_topsrv_create_listener Christoph Hellwig
2020-05-13 6:26 ` [PATCH 31/33] net: remove kernel_setsockopt Christoph Hellwig
2020-05-13 6:26 ` Christoph Hellwig [this message]
2020-05-13 18:03 ` [PATCH 32/33] sctp: add sctp_sock_get_primary_addr Marcelo Ricardo Leitner
2020-05-14 9:51 ` David Laight
2020-05-14 12:30 ` David Laight
2020-05-14 13:27 ` David Laight
2020-05-13 6:26 ` [PATCH 33/33] net: remove kernel_getsockopt Christoph Hellwig
[not found] ` <20200513062649.2100053-30-hch-jcswGhMUV9g@public.gmane.org>
2020-05-13 13:13 ` [PATCH 29/33] rxrpc_sock_set_min_security_level David Howells
2020-05-14 10:29 ` Christoph Hellwig
[not found] ` <20200514102919.GA12680-jcswGhMUV9g@public.gmane.org>
2020-05-15 15:13 ` David Howells
2020-05-13 13:17 ` [PATCH 21/33] ipv4: add ip_sock_set_mtu_discover David Howells
[not found] ` <3123898.1589375861-S6HVgzuS8uM4Awkfq6JHfwNdhmdF6hFW@public.gmane.org>
2020-05-14 6:26 ` Christoph Hellwig
2020-05-15 15:15 ` David Howells
2020-05-13 13:24 ` [PATCH 20/33] ipv4: add ip_sock_set_recverr David Howells
[not found] ` <20200513062649.2100053-24-hch-jcswGhMUV9g@public.gmane.org>
2020-05-13 13:25 ` [PATCH 23/33] ipv6: add ip6_sock_set_recverr David Howells
2020-05-13 13:27 ` [PATCH 06/33] net: add sock_set_timestamps David Howells
2020-05-13 17:38 ` remove kernel_setsockopt and kernel_getsockopt Joe Perches
[not found] ` <ecc165c33962d964d518c80de605af632eee0474.camel-6d6DIl74uiNBDgjK7y7TUQ@public.gmane.org>
2020-05-14 6:27 ` Christoph Hellwig
2020-05-14 8:29 ` David Laight
2020-05-14 10:18 ` Christoph Hellwig
[not found] ` <20200514101838.GA12548-jcswGhMUV9g@public.gmane.org>
2020-05-14 10:26 ` David Laight
2020-05-14 10:34 ` 'Christoph Hellwig'
2020-05-14 11:11 ` David Laight
2020-05-14 19:35 ` [Ocfs2-devel] " Matthew Wilcox
[not found] ` <a76440f7305c4653877ff2abff499f4e-1XygrNkDbNvwg4NCKwmqgw@public.gmane.org>
2020-05-14 20:03 ` David Miller
[not found] ` <20200514.130357.1683454520750761365.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2020-05-15 8:14 ` David Laight
[not found] ` <756758e8f0e34e2e97db470609f5fbba-1XygrNkDbNvwg4NCKwmqgw@public.gmane.org>
2020-05-14 19:57 ` David Miller
2020-05-13 18:45 ` Sagi Grimberg
2020-05-13 19:12 ` David Miller
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