aboutsummaryrefslogtreecommitdiff
path: root/blockdev-nbd.c
diff options
context:
space:
mode:
authorDaniel P. Berrange <berrange@redhat.com>2016-02-10 18:41:03 +0000
committerPaolo Bonzini <pbonzini@redhat.com>2016-02-16 17:13:49 +0100
commitae39827802bc2aa781137d2f41bab0b60acd4e63 (patch)
treeb1c586b75f749176595980240686b21c466cb5ed /blockdev-nbd.c
parentd0d6ff584d0f715ae5c9b934b1846c8760b298f0 (diff)
downloadqemu-arm-ae39827802bc2aa781137d2f41bab0b60acd4e63.tar.gz
nbd: convert blockdev NBD server to use I/O channels for connection setup
This converts the blockdev NBD server to use the QIOChannelSocket class for initial listener socket setup and accepting of client connections. Actual I/O is still being performed against the socket file descriptor using the POSIX socket APIs. Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-Id: <1455129674-17255-6-git-send-email-berrange@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'blockdev-nbd.c')
-rw-r--r--blockdev-nbd.c49
1 files changed, 34 insertions, 15 deletions
diff --git a/blockdev-nbd.c b/blockdev-nbd.c
index efc31a462c..9baf88316c 100644
--- a/blockdev-nbd.c
+++ b/blockdev-nbd.c
@@ -18,32 +18,48 @@
#include "qmp-commands.h"
#include "trace.h"
#include "block/nbd.h"
-#include "qemu/sockets.h"
+#include "io/channel-socket.h"
-static int server_fd = -1;
+static QIOChannelSocket *server_ioc;
+static int server_watch = -1;
-static void nbd_accept(void *opaque)
+static gboolean nbd_accept(QIOChannel *ioc, GIOCondition condition,
+ gpointer opaque)
{
- struct sockaddr_in addr;
- socklen_t addr_len = sizeof(addr);
+ QIOChannelSocket *cioc;
+ int fd;
- int fd = accept(server_fd, (struct sockaddr *)&addr, &addr_len);
+ cioc = qio_channel_socket_accept(QIO_CHANNEL_SOCKET(ioc),
+ NULL);
+ if (!cioc) {
+ return TRUE;
+ }
+
+ fd = dup(cioc->fd);
if (fd >= 0) {
nbd_client_new(NULL, fd, nbd_client_put);
}
+ object_unref(OBJECT(cioc));
+ return TRUE;
}
void qmp_nbd_server_start(SocketAddress *addr, Error **errp)
{
- if (server_fd != -1) {
+ if (server_ioc) {
error_setg(errp, "NBD server already running");
return;
}
- server_fd = socket_listen(addr, errp);
- if (server_fd != -1) {
- qemu_set_fd_handler(server_fd, nbd_accept, NULL, NULL);
+ server_ioc = qio_channel_socket_new();
+ if (qio_channel_socket_listen_sync(server_ioc, addr, errp) < 0) {
+ return;
}
+
+ server_watch = qio_channel_add_watch(QIO_CHANNEL(server_ioc),
+ G_IO_IN,
+ nbd_accept,
+ NULL,
+ NULL);
}
void qmp_nbd_server_add(const char *device, bool has_writable, bool writable,
@@ -52,7 +68,7 @@ void qmp_nbd_server_add(const char *device, bool has_writable, bool writable,
BlockBackend *blk;
NBDExport *exp;
- if (server_fd == -1) {
+ if (!server_ioc) {
error_setg(errp, "NBD server not running");
return;
}
@@ -98,9 +114,12 @@ void qmp_nbd_server_stop(Error **errp)
{
nbd_export_close_all();
- if (server_fd != -1) {
- qemu_set_fd_handler(server_fd, NULL, NULL, NULL);
- close(server_fd);
- server_fd = -1;
+ if (server_watch != -1) {
+ g_source_remove(server_watch);
+ server_watch = -1;
+ }
+ if (server_ioc) {
+ object_unref(OBJECT(server_ioc));
+ server_ioc = NULL;
}
}