[Qemu-devel] [PATCH 22/25] [virtio-9p] coroutine and threading for mkdir

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

Signed-off-by: Venkateswararao Jujjuri "<jvrao@linux.vnet.ibm.com>
---
 hw/9pfs/codir.c          |   34 ++++++++++++++++++++++++++++++++++
 hw/9pfs/virtio-9p-coth.h |    1 +
 hw/9pfs/virtio-9p.c      |   28 ++++++----------------------
 3 files changed, 41 insertions(+), 22 deletions(-)

diff --git a/hw/9pfs/codir.c b/hw/9pfs/codir.c
index adca50c..fcd204d 100644
--- a/hw/9pfs/codir.c
+++ b/hw/9pfs/codir.c
@@ -133,3 +133,37 @@ void v9fs_co_rewinddir(V9fsState *s, V9fsFidState *fidp)
     qemu_coroutine_yield();
     return;
 }
+
+typedef struct V9fsThMkDirState {
+    V9fsState *s;
+    FsCred cred;
+    char *name;
+    int err;
+    V9fsRequest request;
+} V9fsThMkDirState;
+
+static void v9fs_th_do_mkdir(V9fsRequest *request)
+{
+    V9fsThMkDirState *vsp = container_of(request, V9fsThMkDirState, request);
+
+    vsp->err = vsp->s->ops->mkdir(&vsp->s->ctx, vsp->name, &vsp->cred);
+    if (vsp->err < 0) {
+        vsp->err = -errno;
+    }
+}
+
+int v9fs_co_mkdir(V9fsState *s, char *name, mode_t mode, uid_t uid, gid_t gid)
+{
+    V9fsThMkDirState vs;
+    vs.s = s;
+    vs.name = name;
+    cred_init(&vs.cred);
+    vs.cred.fc_mode = mode;
+    vs.cred.fc_uid = uid;
+    vs.cred.fc_gid = gid;
+    vs.request.func = v9fs_th_do_mkdir;
+    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 bd410cb..3edab4e 100644
--- a/hw/9pfs/virtio-9p-coth.h
+++ b/hw/9pfs/virtio-9p-coth.h
@@ -66,4 +66,5 @@ extern int v9fs_co_lgetxattr(V9fsState *, V9fsString *,
                              V9fsString *, void *, size_t);
 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);
 #endif
diff --git a/hw/9pfs/virtio-9p.c b/hw/9pfs/virtio-9p.c
index 4858f37..e5112fe 100644
--- a/hw/9pfs/virtio-9p.c
+++ b/hw/9pfs/virtio-9p.c
@@ -149,19 +149,6 @@ static int v9fs_do_mknod(V9fsState *s, char *name,
     return s->ops->mknod(&s->ctx, name, &cred);
 }
 
-static int v9fs_do_mkdir(V9fsState *s, char *name, mode_t mode,
-                uid_t uid, gid_t gid)
-{
-    FsCred cred;
-
-    cred_init(&cred);
-    cred.fc_uid = uid;
-    cred.fc_gid = gid;
-    cred.fc_mode = mode;
-
-    return s->ops->mkdir(&s->ctx, name, &cred);
-}
-
 static int v9fs_do_fstat(V9fsState *s, int fd, struct stat *stbuf)
 {
     return s->ops->fstat(&s->ctx, fd, stbuf);
@@ -2354,8 +2341,7 @@ out:
 
 static void v9fs_create_post_mkdir(V9fsState *s, V9fsCreateState *vs, int err)
 {
-    if (err) {
-        err = -errno;
+    if (err < 0) {
         goto out;
     }
 
@@ -2404,7 +2390,7 @@ static void v9fs_create_post_lstat(V9fsState *s, V9fsCreateState *vs, int err)
     }
 
     if (vs->perm & P9_STAT_MODE_DIR) {
-        err = v9fs_do_mkdir(s, vs->fullname.data, vs->perm & 0777,
+        err = v9fs_co_mkdir(s, vs->fullname.data, vs->perm & 0777,
                 vs->fidp->uid, -1);
         v9fs_create_post_mkdir(s, vs, err);
     } else if (vs->perm & P9_STAT_MODE_SYMLINK) {
@@ -3225,14 +3211,12 @@ static void v9fs_mkdir(void *opaque)
         goto out;
     }
     v9fs_string_sprintf(&fullname, "%s/%s", fidp->path.data, name.data);
-    err = v9fs_do_mkdir(copdu->s, fullname.data, mode, fidp->uid, gid);
-    if (err == -1) {
-        err = -errno;
+    err = v9fs_co_mkdir(copdu->s, fullname.data, mode, fidp->uid, gid);
+    if (err < 0) {
         goto out;
     }
-    err = v9fs_do_lstat(copdu->s, &fullname, &stbuf);
-    if (err == -1) {
-        err = -errno;
+    err = v9fs_co_lstat(copdu->s, &fullname, &stbuf);
+    if (err < 0) {
         goto out;
     }
     stat_to_qid(&stbuf, &qid);
-- 
1.7.1