[Qemu-devel] [PATCH 21/29] [virtio-9p] coroutine and threading for v9fs_do_symlink

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

Signed-off-by: Venkateswararao Jujjuri "<jvrao@linux.vnet.ibm.com>
---
 hw/9pfs/cofs.c           |   20 ++++++++++++++++++++
 hw/9pfs/virtio-9p-coth.h |    2 ++
 hw/9pfs/virtio-9p.c      |   31 ++++++++-----------------------
 3 files changed, 30 insertions(+), 23 deletions(-)

diff --git a/hw/9pfs/cofs.c b/hw/9pfs/cofs.c
index 473ce53..60468bc 100644
--- a/hw/9pfs/cofs.c
+++ b/hw/9pfs/cofs.c
@@ -169,3 +169,23 @@ int v9fs_co_rename(V9fsState *s, V9fsString *oldpath, V9fsString *newpath)
         });
     return err;
 }
+
+int v9fs_co_symlink(V9fsState *s, V9fsFidState *fidp,
+                    const char *oldpath, const char *newpath, gid_t gid)
+{
+    int err;
+    FsCred cred;
+
+    cred_init(&cred);
+    cred.fc_uid = fidp->uid;
+    cred.fc_gid = gid;
+    cred.fc_mode = 0777;
+    v9fs_co_run_in_worker(
+        {
+            err = s->ops->symlink(&s->ctx, oldpath, newpath, &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 a3881f3..e394933 100644
--- a/hw/9pfs/virtio-9p-coth.h
+++ b/hw/9pfs/virtio-9p-coth.h
@@ -86,4 +86,6 @@ extern int v9fs_co_lremovexattr(V9fsState *, V9fsString *, V9fsString *);
 extern int v9fs_co_closedir(V9fsState *, V9fsFidState *);
 extern int v9fs_co_close(V9fsState *, V9fsFidState *);
 extern int v9fs_co_fsync(V9fsState *, V9fsFidState *, int);
+extern int v9fs_co_symlink(V9fsState *, V9fsFidState *, const char *,
+                           const char *, gid_t);
 #endif
diff --git a/hw/9pfs/virtio-9p.c b/hw/9pfs/virtio-9p.c
index 1e6c2b8..cb11ee6 100644
--- a/hw/9pfs/virtio-9p.c
+++ b/hw/9pfs/virtio-9p.c
@@ -117,18 +117,6 @@ static int v9fs_do_chmod(V9fsState *s, V9fsString *path, mode_t mode)
     return s->ops->chmod(&s->ctx, path->data, &cred);
 }
 
-static int v9fs_do_symlink(V9fsState *s, V9fsFidState *fidp,
-        const char *oldpath, const char *newpath, gid_t gid)
-{
-    FsCred cred;
-    cred_init(&cred);
-    cred.fc_uid = fidp->uid;
-    cred.fc_gid = gid;
-    cred.fc_mode = 0777;
-
-    return s->ops->symlink(&s->ctx, oldpath, newpath, &cred);
-}
-
 static int v9fs_do_link(V9fsState *s, V9fsString *oldpath, V9fsString *newpath)
 {
     return s->ops->link(&s->ctx, oldpath->data, newpath->data);
@@ -2030,10 +2018,9 @@ static void v9fs_create(void *opaque)
         }
         fidp->fid_type = P9_FID_DIR;
     } else if (perm & P9_STAT_MODE_SYMLINK) {
-        err = v9fs_do_symlink(pdu->s, fidp, extension.data,
+        err = v9fs_co_symlink(pdu->s, fidp, extension.data,
                               fullname.data, -1);
         if (err < 0) {
-            err = -errno;
             goto out;
         }
     } else if (perm & P9_STAT_MODE_LINK) {
@@ -2142,19 +2129,17 @@ static void v9fs_symlink(void *opaque)
     }
 
     v9fs_string_sprintf(&fullname, "%s/%s", dfidp->path.data, name.data);
-    err = v9fs_do_symlink(pdu->s, dfidp, symname.data, fullname.data, gid);
+    err = v9fs_co_symlink(pdu->s, dfidp, symname.data, fullname.data, gid);
     if (err < 0) {
-        err = -errno;
         goto out;
     }
-    err = v9fs_do_lstat(pdu->s, &fullname, &stbuf);
-    if (err == 0) {
-        stat_to_qid(&stbuf, &qid);
-        offset += pdu_marshal(pdu, offset, "Q", &qid);
-        err = offset;
-    } else {
-        err = -errno;
+    err = v9fs_co_lstat(pdu->s, &fullname, &stbuf);
+    if (err < 0) {
+        goto out;
     }
+    stat_to_qid(&stbuf, &qid);
+    offset += pdu_marshal(pdu, offset, "Q", &qid);
+    err = offset;
 out:
     complete_pdu(pdu->s, pdu, err);
     v9fs_string_free(&name);
-- 
1.7.1