[Qemu-devel] [PATCH -V4 22/26] [virtio-9p] coroutine and threading for mkdir

["Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>]

From: Venkateswararao Jujjuri (JV) <jvrao@linux.vnet.ibm.com>

Signed-off-by: Venkateswararao Jujjuri "<jvrao@linux.vnet.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
 hw/9pfs/codir.c          |   19 +++++++++++++++++++
 hw/9pfs/virtio-9p-coth.h |    1 +
 hw/9pfs/virtio-9p.c      |   28 ++++++----------------------
 3 files changed, 26 insertions(+), 22 deletions(-)

diff --git a/hw/9pfs/codir.c b/hw/9pfs/codir.c
index 47b10df..28f2ad7 100644
--- a/hw/9pfs/codir.c
+++ b/hw/9pfs/codir.c
@@ -64,3 +64,22 @@ void v9fs_co_rewinddir(V9fsState *s, V9fsFidState *fidp)
             s->ops->rewinddir(&s->ctx, fidp->fs.dir);
         });
 }
+
+int v9fs_co_mkdir(V9fsState *s, char *name, mode_t mode, uid_t uid, gid_t gid)
+{
+    int err;
+    FsCred cred;
+
+    cred_init(&cred);
+    cred.fc_mode = mode;
+    cred.fc_uid = uid;
+    cred.fc_gid = gid;
+    v9fs_co_run_in_worker(
+        {
+            err = s->ops->mkdir(&s->ctx, name, &cred);
+            if (err < 0) {
+                err = -errno;
+            }
+        });
+    return err;
+}
diff --git a/hw/9pfs/virtio-9p-coth.h b/hw/9pfs/virtio-9p-coth.h
index d023683..96e88d8 100644
--- a/hw/9pfs/virtio-9p-coth.h
+++ b/hw/9pfs/virtio-9p-coth.h
@@ -73,4 +73,5 @@ 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 fbed376..37ba72c 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);
@@ -2329,8 +2316,7 @@ out:
 
 static void v9fs_create_post_mkdir(V9fsState *s, V9fsCreateState *vs, int err)
 {
-    if (err) {
-        err = -errno;
+    if (err < 0) {
         goto out;
     }
 
@@ -2379,7 +2365,7 @@ 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) {
@@ -3179,14 +3165,12 @@ static void v9fs_mkdir(void *opaque)
         goto out;
     }
     v9fs_string_sprintf(&fullname, "%s/%s", fidp->path.data, name.data);
-    err = v9fs_do_mkdir(pdu->s, fullname.data, mode, fidp->uid, gid);
-    if (err == -1) {
-        err = -errno;
+    err = v9fs_co_mkdir(pdu->s, fullname.data, mode, fidp->uid, gid);
+    if (err < 0) {
         goto out;
     }
-    err = v9fs_do_lstat(pdu->s, &fullname, &stbuf);
-    if (err == -1) {
-        err = -errno;
+    err = v9fs_co_lstat(pdu->s, &fullname, &stbuf);
+    if (err < 0) {
         goto out;
     }
     stat_to_qid(&stbuf, &qid);
-- 
1.7.4.1