[Qemu-devel] [PATCH v4 06/11] nbd: Group all Linux-specific ioctl code in one place

[Eric Blake <eblake@redhat.com>]

NBD ioctl()s are used to manage an NBD client session where
initial handshake is done in userspace, but then the transmission
phase is handed off to the kernel through a /dev/nbdX device.
As such, all ioctls sent to the kernel on the /dev/nbdX fd belong
in client.c; nbd_disconnect() was out-of-place in server.c.

Signed-off-by: Eric Blake <eblake@redhat.com>
---
 nbd/client.c | 13 +++++++++++++
 nbd/server.c | 18 ------------------
 2 files changed, 13 insertions(+), 18 deletions(-)

diff --git a/nbd/client.c b/nbd/client.c
index 42e4e52..ae9fdd4 100644
--- a/nbd/client.c
+++ b/nbd/client.c
@@ -667,6 +667,15 @@ int nbd_client(int fd)
     errno = serrno;
     return ret;
 }
+
+int nbd_disconnect(int fd)
+{
+    ioctl(fd, NBD_CLEAR_QUE);
+    ioctl(fd, NBD_DISCONNECT);
+    ioctl(fd, NBD_CLEAR_SOCK);
+    return 0;
+}
+
 #else
 int nbd_init(int fd, QIOChannelSocket *ioc, uint32_t flags, off_t size)
 {
@@ -677,6 +686,10 @@ int nbd_client(int fd)
 {
     return -ENOTSUP;
 }
+int nbd_disconnect(int fd)
+{
+    return -ENOTSUP;
+}
 #endif

 ssize_t nbd_send_request(QIOChannel *ioc, struct nbd_request *request)
diff --git a/nbd/server.c b/nbd/server.c
index 2ef2dfa..77b0385 100644
--- a/nbd/server.c
+++ b/nbd/server.c
@@ -624,24 +624,6 @@ fail:
     return rc;
 }

-#ifdef __linux__
-
-int nbd_disconnect(int fd)
-{
-    ioctl(fd, NBD_CLEAR_QUE);
-    ioctl(fd, NBD_DISCONNECT);
-    ioctl(fd, NBD_CLEAR_SOCK);
-    return 0;
-}
-
-#else
-
-int nbd_disconnect(int fd)
-{
-    return -ENOTSUP;
-}
-#endif
-
 static ssize_t nbd_receive_request(QIOChannel *ioc, struct nbd_request *request)
 {
     uint8_t buf[NBD_REQUEST_SIZE];
-- 
2.5.5