[Qemu-devel] [PATCH 11/25] hw/9pfs: Add yield support to statfs coroutine

["Venkateswararao Jujjuri (JV)" <jvrao@linux.vnet.ibm.com>]

From: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri "<jvrao@linux.vnet.ibm.com>
---
 hw/9pfs/cofs.c           |   31 +++++++++++++++++++++++++++++++
 hw/9pfs/virtio-9p-coth.h |    1 +
 2 files changed, 32 insertions(+), 0 deletions(-)

diff --git a/hw/9pfs/cofs.c b/hw/9pfs/cofs.c
index b972561..27e243e 100644
--- a/hw/9pfs/cofs.c
+++ b/hw/9pfs/cofs.c
@@ -58,3 +58,34 @@ int v9fs_co_readlink(V9fsState *s, V9fsString *path, V9fsString *buf,
     buf->data = vs.buf->data;
     return vs.err;
 }
+
+typedef struct V9fsThStatfsState {
+    int err;
+    V9fsState *s;
+    V9fsString *path;
+    struct statfs *stbuf;
+    V9fsRequest request;
+} V9fsThStatfsState;
+
+static void v9fs_th_do_statfs(V9fsRequest *request)
+{
+    V9fsThStatfsState *vsp = container_of(request, V9fsThStatfsState,
+                                          request);
+    vsp->err = vsp->s->ops->statfs(&vsp->s->ctx, vsp->path->data, vsp->stbuf);
+    if (vsp->err < 0) {
+        vsp->err = -errno;
+    }
+}
+
+int v9fs_co_statfs(V9fsState *s, V9fsString *path, struct statfs *stbuf)
+{
+    V9fsThStatfsState vs;
+    vs.s = s;
+    vs.path = path;
+    vs.stbuf = stbuf;
+    vs.request.func = v9fs_th_do_statfs;
+    vs.request.coroutine = qemu_coroutine_self();
+    v9fs_qemu_submit_request(&vs.request);
+    qemu_coroutine_yield();
+    return vs.err;
+}
diff --git a/hw/9pfs/virtio-9p-coth.h b/hw/9pfs/virtio-9p-coth.h
index 4d34098..57f30ff 100644
--- a/hw/9pfs/virtio-9p-coth.h
+++ b/hw/9pfs/virtio-9p-coth.h
@@ -55,4 +55,5 @@ extern int v9fs_co_readdir(V9fsState *, V9fsFidState *,
 extern off_t v9fs_co_telldir(V9fsState *, V9fsFidState *);
 extern void v9fs_co_seekdir(V9fsState *, V9fsFidState *, off_t);
 extern void v9fs_co_rewinddir(V9fsState *, V9fsFidState *);
+extern int v9fs_co_statfs(V9fsState *, V9fsString *, struct statfs *);
 #endif
-- 
1.7.1