hw/9pfs: Add yield support for preadv coroutine

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>

diff --git a/hw/9pfs/cofile.c b/hw/9pfs/cofile.c
index e0d032dc15a7e58f1596a7fda9f723e07205d533..e388146422c294a30abaafc1bb94b2fadb0527c4 100644 (file)
--- a/hw/9pfs/cofile.c
+++ b/hw/9pfs/cofile.c
@@ -144,3 +144,20 @@ int v9fs_co_pwritev(V9fsState *s, V9fsFidState *fidp,
         });
     return err;
 }
+
+int v9fs_co_preadv(V9fsState *s, V9fsFidState *fidp,
+                   struct iovec *iov, int iovcnt, int64_t offset)
+{
+    int fd;
+    int err;
+
+    fd = fidp->fs.fd;
+    v9fs_co_run_in_worker(
+        {
+            err = s->ops->preadv(&s->ctx, fd, iov, iovcnt, offset);
+            if (err < 0) {
+                err = -errno;
+            }
+        });
+    return err;
+}

diff --git a/hw/9pfs/virtio-9p-coth.h b/hw/9pfs/virtio-9p-coth.h
index fa408f876ee7b79e1345dfe3f201a081de72308b..5fa2972683199af5a6a4a518cf9b79110e7040ff 100644 (file)
--- a/hw/9pfs/virtio-9p-coth.h
+++ b/hw/9pfs/virtio-9p-coth.h
@@ -91,4 +91,6 @@ extern int v9fs_co_symlink(V9fsState *, V9fsFidState *, const char *,
 extern int v9fs_co_link(V9fsState *, V9fsString *, V9fsString *);
 extern int v9fs_co_pwritev(V9fsState *, V9fsFidState *,
                            struct iovec *, int, int64_t);
+extern int v9fs_co_preadv(V9fsState *, V9fsFidState *,
+                          struct iovec *, int, int64_t);
 #endif