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From:   Arnd Bergmann <arnd@arndb.de>
To:     Alexander Viro <viro@zeniv.linux.org.uk>
Cc:     linux-fsdevel@vger.kernel.org, y2038@lists.linaro.org,
        linux-kernel@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>,
        Marcel Holtmann <marcel@holtmann.org>,
        Johan Hedberg <johan.hedberg@gmail.com>,
        "David S. Miller" <davem@davemloft.net>,
        linux-bluetooth@vger.kernel.org, netdev@vger.kernel.org
Subject: [PATCH v3 17/26] compat_ioctl: move hci_sock handlers into driver
Date:   Tue, 16 Apr 2019 22:25:38 +0200
Message-Id: <20190416202701.127745-6-arnd@arndb.de>
In-Reply-To: <20190416202701.127745-1-arnd@arndb.de>
References: <20190416202013.4034148-1-arnd@arndb.de>
 <20190416202701.127745-1-arnd@arndb.de>
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All these ioctl commands are compatible, so we can handle
them with a trivial wrapper in hci_sock.c and remove
the listing in fs/compat_ioctl.c.

A few of the commands pass integer arguments instead of
pointers, so for correctness skip the compat_ptr() conversion
here.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 fs/compat_ioctl.c        | 24 ------------------------
 net/bluetooth/hci_sock.c | 21 ++++++++++++++++++++-
 2 files changed, 20 insertions(+), 25 deletions(-)

diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c
index efe3df389150..9024cae05eda 100644
--- a/fs/compat_ioctl.c
+++ b/fs/compat_ioctl.c
@@ -40,9 +40,6 @@
 
 #include "internal.h"
 
-#include <net/bluetooth/bluetooth.h>
-#include <net/bluetooth/hci_sock.h>
-
 #ifdef CONFIG_BLOCK
 #include <linux/cdrom.h>
 #include <linux/fd.h>
@@ -587,27 +584,6 @@ COMPATIBLE_IOCTL(RNDADDENTROPY)
 COMPATIBLE_IOCTL(RNDZAPENTCNT)
 COMPATIBLE_IOCTL(RNDCLEARPOOL)
 /* Bluetooth */
-COMPATIBLE_IOCTL(HCIDEVUP)
-COMPATIBLE_IOCTL(HCIDEVDOWN)
-COMPATIBLE_IOCTL(HCIDEVRESET)
-COMPATIBLE_IOCTL(HCIDEVRESTAT)
-COMPATIBLE_IOCTL(HCIGETDEVLIST)
-COMPATIBLE_IOCTL(HCIGETDEVINFO)
-COMPATIBLE_IOCTL(HCIGETCONNLIST)
-COMPATIBLE_IOCTL(HCIGETCONNINFO)
-COMPATIBLE_IOCTL(HCIGETAUTHINFO)
-COMPATIBLE_IOCTL(HCISETRAW)
-COMPATIBLE_IOCTL(HCISETSCAN)
-COMPATIBLE_IOCTL(HCISETAUTH)
-COMPATIBLE_IOCTL(HCISETENCRYPT)
-COMPATIBLE_IOCTL(HCISETPTYPE)
-COMPATIBLE_IOCTL(HCISETLINKPOL)
-COMPATIBLE_IOCTL(HCISETLINKMODE)
-COMPATIBLE_IOCTL(HCISETACLMTU)
-COMPATIBLE_IOCTL(HCISETSCOMTU)
-COMPATIBLE_IOCTL(HCIBLOCKADDR)
-COMPATIBLE_IOCTL(HCIUNBLOCKADDR)
-COMPATIBLE_IOCTL(HCIINQUIRY)
 COMPATIBLE_IOCTL(HCIUARTSETPROTO)
 COMPATIBLE_IOCTL(HCIUARTGETPROTO)
 COMPATIBLE_IOCTL(HCIUARTGETDEVICE)
diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c
index d32077b28433..5d0ed28c0d3a 100644
--- a/net/bluetooth/hci_sock.c
+++ b/net/bluetooth/hci_sock.c
@@ -23,7 +23,7 @@
 */
 
 /* Bluetooth HCI sockets. */
-
+#include <linux/compat.h>
 #include <linux/export.h>
 #include <linux/utsname.h>
 #include <linux/sched.h>
@@ -1054,6 +1054,22 @@ static int hci_sock_ioctl(struct socket *sock, unsigned int cmd,
 	return err;
 }
 
+#ifdef CONFIG_COMPAT
+static int hci_sock_compat_ioctl(struct socket *sock, unsigned int cmd,
+				 unsigned long arg)
+{
+	switch (cmd) {
+	case HCIDEVUP:
+	case HCIDEVDOWN:
+	case HCIDEVRESET:
+	case HCIDEVRESTAT:
+		return hci_sock_ioctl(sock, cmd, arg);
+	}
+
+	return hci_sock_ioctl(sock, cmd, (unsigned long)compat_ptr(arg));
+}
+#endif
+
 static int hci_sock_bind(struct socket *sock, struct sockaddr *addr,
 			 int addr_len)
 {
@@ -1974,6 +1990,9 @@ static const struct proto_ops hci_sock_ops = {
 	.sendmsg	= hci_sock_sendmsg,
 	.recvmsg	= hci_sock_recvmsg,
 	.ioctl		= hci_sock_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl	= hci_sock_compat_ioctl,
+#endif
 	.poll		= datagram_poll,
 	.listen		= sock_no_listen,
 	.shutdown	= sock_no_shutdown,
-- 
2.20.0