[Qemu-devel] [PATCH 25/25] [virtio-9p] coroutine and threading for remove/unlink

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

Signed-off-by: Venkateswararao Jujjuri "<jvrao@linux.vnet.ibm.com>
---
 hw/9pfs/cofs.c           |   28 ++++++++++++++++++++++++++++
 hw/9pfs/virtio-9p-coth.h |    1 +
 hw/9pfs/virtio-9p.c      |   11 ++---------
 3 files changed, 31 insertions(+), 9 deletions(-)

diff --git a/hw/9pfs/cofs.c b/hw/9pfs/cofs.c
index 06127f7..68cd3ab 100644
--- a/hw/9pfs/cofs.c
+++ b/hw/9pfs/cofs.c
@@ -269,3 +269,31 @@ int v9fs_co_mknod(V9fsState *s, V9fsString *path, uid_t uid,
     qemu_coroutine_yield();
     return vs.err;
 }
+
+typedef struct V9fsThRemoveState {
+    V9fsState *s;
+    V9fsString *path;
+    int err;
+    V9fsRequest request;
+} V9fsThRemoveState;
+
+static void v9fs_th_do_remove(V9fsRequest *request)
+{
+    V9fsThRemoveState *vsp = container_of(request, V9fsThRemoveState, request);
+    vsp->err = vsp->s->ops->remove(&vsp->s->ctx, vsp->path->data);
+    if (vsp->err < 0) {
+        vsp->err = -errno;
+    }
+}
+
+int v9fs_co_remove(V9fsState *s, V9fsString *path)
+{
+    V9fsThRemoveState vs;
+    vs.s = s;
+    vs.path = path;
+    vs.request.func = v9fs_th_do_remove;
+    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 3edab4e..b6428ec 100644
--- a/hw/9pfs/virtio-9p-coth.h
+++ b/hw/9pfs/virtio-9p-coth.h
@@ -67,4 +67,5 @@ extern int v9fs_co_lgetxattr(V9fsState *, V9fsString *,
 extern int v9fs_co_mknod(V9fsState *, V9fsString *, uid_t,
                          gid_t, dev_t, mode_t);
 extern int v9fs_co_mkdir(V9fsState *, char *, mode_t, uid_t, gid_t);
+extern int v9fs_co_remove(V9fsState *, V9fsString *);
 #endif
diff --git a/hw/9pfs/virtio-9p.c b/hw/9pfs/virtio-9p.c
index 114162c..479ad78 100644
--- a/hw/9pfs/virtio-9p.c
+++ b/hw/9pfs/virtio-9p.c
@@ -212,11 +212,6 @@ static int v9fs_do_utimensat(V9fsState *s, V9fsString *path,
     return s->ops->utimensat(&s->ctx, path->data, times);
 }
 
-static int v9fs_do_remove(V9fsState *s, V9fsString *path)
-{
-    return s->ops->remove(&s->ctx, path->data);
-}
-
 static int v9fs_do_fsync(V9fsState *s, int fd, int datasync)
 {
     return s->ops->fsync(&s->ctx, fd, datasync);
@@ -2627,10 +2622,8 @@ static void v9fs_remove(void *opaque)
         err = -EINVAL;
         goto out;
     }
-    err = v9fs_do_remove(copdu->s, &fidp->path);
-    if (err < 0) {
-        err = -errno;
-    } else {
+    err = v9fs_co_remove(copdu->s, &fidp->path);
+    if (!err) {
         err = offset;
     }
 
-- 
1.7.1