[Qemu-devel] [PATCH 23/29] hw/9pfs: Add yield support for pwritev 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/cofile.c         |   17 +++++++++++++++++
 hw/9pfs/virtio-9p-coth.h |    2 ++
 2 files changed, 19 insertions(+), 0 deletions(-)

diff --git a/hw/9pfs/cofile.c b/hw/9pfs/cofile.c
index 52eec2a..e0d032d 100644
--- a/hw/9pfs/cofile.c
+++ b/hw/9pfs/cofile.c
@@ -127,3 +127,20 @@ int v9fs_co_link(V9fsState *s, V9fsString *oldpath, V9fsString *newpath)
         });
     return err;
 }
+
+int v9fs_co_pwritev(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->pwritev(&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 17ffd76..fa408f8 100644
--- a/hw/9pfs/virtio-9p-coth.h
+++ b/hw/9pfs/virtio-9p-coth.h
@@ -89,4 +89,6 @@ extern int v9fs_co_fsync(V9fsState *, V9fsFidState *, int);
 extern int v9fs_co_symlink(V9fsState *, V9fsFidState *, const char *,
                            const char *, gid_t);
 extern int v9fs_co_link(V9fsState *, V9fsString *, V9fsString *);
+extern int v9fs_co_pwritev(V9fsState *, V9fsFidState *,
+                           struct iovec *, int, int64_t);
 #endif
-- 
1.7.1