Split nbd block client code
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
diff --git a/block/nbd-client.h b/block/nbd-client.h
new file mode 100644
index 0000000..c271236
--- /dev/null
+++ b/block/nbd-client.h
@@ -0,0 +1,51 @@
+#ifndef NBD_CLIENT_H
+#define NBD_CLIENT_H
+
+#include "qemu-common.h"
+#include "block/nbd.h"
+#include "block/block_int.h"
+
+/* #define DEBUG_NBD */
+
+#if defined(DEBUG_NBD)
+#define logout(fmt, ...) \
+ fprintf(stderr, "nbd\t%-24s" fmt, __func__, ##__VA_ARGS__)
+#else
+#define logout(fmt, ...) ((void)0)
+#endif
+
+#define MAX_NBD_REQUESTS 16
+
+typedef struct NbdClientSession {
+ int sock;
+ uint32_t nbdflags;
+ off_t size;
+ size_t blocksize;
+
+ CoMutex send_mutex;
+ CoMutex free_sema;
+ Coroutine *send_coroutine;
+ int in_flight;
+
+ Coroutine *recv_coroutine[MAX_NBD_REQUESTS];
+ struct nbd_reply reply;
+
+ char *export_name; /* An NBD server may export several devices */
+ bool is_unix;
+
+ BlockDriverState *bs;
+} NbdClientSession;
+
+int nbd_client_session_init(NbdClientSession *client,
+ BlockDriverState *bs, int sock);
+void nbd_client_session_close(NbdClientSession *client);
+
+int nbd_client_session_co_discard(NbdClientSession *client, int64_t sector_num,
+ int nb_sectors);
+int nbd_client_session_co_flush(NbdClientSession *client);
+int nbd_client_session_co_writev(NbdClientSession *client, int64_t sector_num,
+ int nb_sectors, QEMUIOVector *qiov);
+int nbd_client_session_co_readv(NbdClientSession *client, int64_t sector_num,
+ int nb_sectors, QEMUIOVector *qiov);
+
+#endif /* NBD_CLIENT_H */
