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authorArnd Bergmann <arnd@arndb.de>2019-04-17 23:51:48 +0300
committerDavid S. Miller <davem@davemloft.net>2019-04-20 00:07:40 +0300
commitc7cbdbf29f488a19982cd9f4a109887f18028bbb (patch)
tree74b39321c14b93411eda0939683dc9b8b713717b /net/socket.c
parent1ab839281cf72476988901a2606378d76530f99c (diff)
downloadlinux-c7cbdbf29f488a19982cd9f4a109887f18028bbb.tar.xz
net: rework SIOCGSTAMP ioctl handling
The SIOCGSTAMP/SIOCGSTAMPNS ioctl commands are implemented by many socket protocol handlers, and all of those end up calling the same sock_get_timestamp()/sock_get_timestampns() helper functions, which results in a lot of duplicate code. With the introduction of 64-bit time_t on 32-bit architectures, this gets worse, as we then need four different ioctl commands in each socket protocol implementation. To simplify that, let's add a new .gettstamp() operation in struct proto_ops, and move ioctl implementation into the common sock_ioctl()/compat_sock_ioctl_trans() functions that these all go through. We can reuse the sock_get_timestamp() implementation, but generalize it so it can deal with both native and compat mode, as well as timeval and timespec structures. Acked-by: Stefan Schmidt <stefan@datenfreihafen.org> Acked-by: Neil Horman <nhorman@tuxdriver.com> Acked-by: Marc Kleine-Budde <mkl@pengutronix.de> Link: https://lore.kernel.org/lkml/CAK8P3a038aDQQotzua_QtKGhq8O9n+rdiz2=WDCp82ys8eUT+A@mail.gmail.com/ Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/socket.c')
-rw-r--r--net/socket.c48
1 files changed, 14 insertions, 34 deletions
diff --git a/net/socket.c b/net/socket.c
index 8255f5bda0aa..ab624d42ead5 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -1164,6 +1164,15 @@ static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg)
err = open_related_ns(&net->ns, get_net_ns);
break;
+ case SIOCGSTAMP:
+ case SIOCGSTAMPNS:
+ if (!sock->ops->gettstamp) {
+ err = -ENOIOCTLCMD;
+ break;
+ }
+ err = sock->ops->gettstamp(sock, argp,
+ cmd == SIOCGSTAMP, false);
+ break;
default:
err = sock_do_ioctl(net, sock, cmd, arg);
break;
@@ -2916,38 +2925,6 @@ void socket_seq_show(struct seq_file *seq)
#endif /* CONFIG_PROC_FS */
#ifdef CONFIG_COMPAT
-static int do_siocgstamp(struct net *net, struct socket *sock,
- unsigned int cmd, void __user *up)
-{
- mm_segment_t old_fs = get_fs();
- struct timeval ktv;
- int err;
-
- set_fs(KERNEL_DS);
- err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv);
- set_fs(old_fs);
- if (!err)
- err = compat_put_timeval(&ktv, up);
-
- return err;
-}
-
-static int do_siocgstampns(struct net *net, struct socket *sock,
- unsigned int cmd, void __user *up)
-{
- mm_segment_t old_fs = get_fs();
- struct timespec kts;
- int err;
-
- set_fs(KERNEL_DS);
- err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts);
- set_fs(old_fs);
- if (!err)
- err = compat_put_timespec(&kts, up);
-
- return err;
-}
-
static int compat_dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32)
{
struct compat_ifconf ifc32;
@@ -3348,9 +3325,12 @@ static int compat_sock_ioctl_trans(struct file *file, struct socket *sock,
case SIOCDELRT:
return routing_ioctl(net, sock, cmd, argp);
case SIOCGSTAMP:
- return do_siocgstamp(net, sock, cmd, argp);
case SIOCGSTAMPNS:
- return do_siocgstampns(net, sock, cmd, argp);
+ if (!sock->ops->gettstamp)
+ return -ENOIOCTLCMD;
+ return sock->ops->gettstamp(sock, argp, cmd == SIOCGSTAMP,
+ !COMPAT_USE_64BIT_TIME);
+
case SIOCBONDSLAVEINFOQUERY:
case SIOCBONDINFOQUERY:
case SIOCSHWTSTAMP: