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authorMichael R. Hines <mrhines@us.ibm.com>2013-06-25 21:35:29 -0400
committerJuan Quintela <quintela@redhat.com>2013-06-27 02:38:36 +0200
commit9f05d0c3a4f9e8fcb13ed09cc350af45a627809a (patch)
tree285c6a7eca160d837dde3d8be7e572cac2b3fd31
parent2b0ce0797d6bfb13ebefe010da86abced0b7a9b3 (diff)
downloadqemu-arm-9f05d0c3a4f9e8fcb13ed09cc350af45a627809a.tar.gz
rdma: export yield_until_fd_readable()
The RDMA event channel can be made non-blocking just like a TCP socket. Exporting this function allows us to yield so that the QEMU monitor remains available. Reviewed-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Chegu Vinod <chegu_vinod@hp.com> Tested-by: Chegu Vinod <chegu_vinod@hp.com> Tested-by: Michael R. Hines <mrhines@us.ibm.com> Signed-off-by: Michael R. Hines <mrhines@us.ibm.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
-rw-r--r--include/block/coroutine.h6
-rw-r--r--qemu-coroutine-io.c23
-rw-r--r--savevm.c28
3 files changed, 29 insertions, 28 deletions
diff --git a/include/block/coroutine.h b/include/block/coroutine.h
index a978162a3f..377805a3b0 100644
--- a/include/block/coroutine.h
+++ b/include/block/coroutine.h
@@ -209,4 +209,10 @@ void qemu_co_rwlock_unlock(CoRwlock *lock);
*/
void coroutine_fn co_sleep_ns(QEMUClock *clock, int64_t ns);
+/**
+ * Yield until a file descriptor becomes readable
+ *
+ * Note that this function clobbers the handlers for the file descriptor.
+ */
+void coroutine_fn yield_until_fd_readable(int fd);
#endif /* QEMU_COROUTINE_H */
diff --git a/qemu-coroutine-io.c b/qemu-coroutine-io.c
index e8ad1a4011..c4df35a640 100644
--- a/qemu-coroutine-io.c
+++ b/qemu-coroutine-io.c
@@ -63,3 +63,26 @@ qemu_co_send_recv(int sockfd, void *buf, size_t bytes, bool do_send)
struct iovec iov = { .iov_base = buf, .iov_len = bytes };
return qemu_co_sendv_recvv(sockfd, &iov, 1, 0, bytes, do_send);
}
+
+typedef struct {
+ Coroutine *co;
+ int fd;
+} FDYieldUntilData;
+
+static void fd_coroutine_enter(void *opaque)
+{
+ FDYieldUntilData *data = opaque;
+ qemu_set_fd_handler(data->fd, NULL, NULL, NULL);
+ qemu_coroutine_enter(data->co, NULL);
+}
+
+void coroutine_fn yield_until_fd_readable(int fd)
+{
+ FDYieldUntilData data;
+
+ assert(qemu_in_coroutine());
+ data.co = qemu_coroutine_self();
+ data.fd = fd;
+ qemu_set_fd_handler(fd, fd_coroutine_enter, NULL, &data);
+ qemu_coroutine_yield();
+}
diff --git a/savevm.c b/savevm.c
index 9b5577ef6c..e35c7a4084 100644
--- a/savevm.c
+++ b/savevm.c
@@ -149,34 +149,6 @@ typedef struct QEMUFileSocket
QEMUFile *file;
} QEMUFileSocket;
-typedef struct {
- Coroutine *co;
- int fd;
-} FDYieldUntilData;
-
-static void fd_coroutine_enter(void *opaque)
-{
- FDYieldUntilData *data = opaque;
- qemu_set_fd_handler(data->fd, NULL, NULL, NULL);
- qemu_coroutine_enter(data->co, NULL);
-}
-
-/**
- * Yield until a file descriptor becomes readable
- *
- * Note that this function clobbers the handlers for the file descriptor.
- */
-static void coroutine_fn yield_until_fd_readable(int fd)
-{
- FDYieldUntilData data;
-
- assert(qemu_in_coroutine());
- data.co = qemu_coroutine_self();
- data.fd = fd;
- qemu_set_fd_handler(fd, fd_coroutine_enter, NULL, &data);
- qemu_coroutine_yield();
-}
-
static ssize_t socket_writev_buffer(void *opaque, struct iovec *iov, int iovcnt,
int64_t pos)
{