9pfs: factor out v9fs_device_{,un}realize_common

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>

1 files changed, 7 insertions, 83 deletions

diff --git a/hw/9pfs/virtio-9p-device.c b/hw/9pfs/virtio-9p-device.c
index bc103b7fa7..4aa8a6b33e 100644
--- a/hw/9pfs/virtio-9p-device.c
+++ b/hw/9pfs/virtio-9p-device.c
@@ -101,93 +101,18 @@ static void virtio_9p_device_realize(DeviceState *dev, Error **errp)
 {
     VirtIODevice *vdev = VIRTIO_DEVICE(dev);
     V9fsState *s = VIRTIO_9P(dev);
-    int i, len;
-    struct stat stat;
-    FsDriverEntry *fse;
-    V9fsPath path;
-
-    virtio_init(vdev, "virtio-9p", VIRTIO_ID_9P,
-                sizeof(struct virtio_9p_config) + MAX_TAG_LEN);
-
-    /* initialize pdu allocator */
-    QLIST_INIT(&s->free_list);
-    QLIST_INIT(&s->active_list);
-    for (i = 0; i < (MAX_REQ - 1); i++) {
-        QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next);
-        s->pdus[i].s = s;
-    }
-
-    s->vq = virtio_add_queue(vdev, MAX_REQ, handle_9p_output);
-
-    v9fs_path_init(&path);
-
-    fse = get_fsdev_fsentry(s->fsconf.fsdev_id);
-
-    if (!fse) {
-        /* We don't have a fsdev identified by fsdev_id */
-        error_setg(errp, "Virtio-9p device couldn't find fsdev with the "
-                   "id = %s",
-                   s->fsconf.fsdev_id ? s->fsconf.fsdev_id : "NULL");
-        goto out;
-    }
-
-    if (!s->fsconf.tag) {
-        /* we haven't specified a mount_tag */
-        error_setg(errp, "fsdev with id %s needs mount_tag arguments",
-                   s->fsconf.fsdev_id);
-        goto out;
-    }
 
-    s->ctx.export_flags = fse->export_flags;
-    s->ctx.fs_root = g_strdup(fse->path);
-    s->ctx.exops.get_st_gen = NULL;
-    len = strlen(s->fsconf.tag);
-    if (len > MAX_TAG_LEN - 1) {
-        error_setg(errp, "mount tag '%s' (%d bytes) is longer than "
-                   "maximum (%d bytes)", s->fsconf.tag, len, MAX_TAG_LEN - 1);
+    if (v9fs_device_realize_common(s, errp)) {
         goto out;
     }
 
-    s->tag = g_strdup(s->fsconf.tag);
-    s->ctx.uid = -1;
-
-    s->ops = fse->ops;
-    s->config_size = sizeof(struct virtio_9p_config) + len;
-    s->fid_list = NULL;
-    qemu_co_rwlock_init(&s->rename_lock);
-
-    if (s->ops->init(&s->ctx) < 0) {
-        error_setg(errp, "Virtio-9p Failed to initialize fs-driver with id:%s"
-                   " and export path:%s", s->fsconf.fsdev_id, s->ctx.fs_root);
-        goto out;
-    }
-
-    /*
-     * Check details of export path, We need to use fs driver
-     * call back to do that. Since we are in the init path, we don't
-     * use co-routines here.
-     */
-    if (s->ops->name_to_path(&s->ctx, NULL, "/", &path) < 0) {
-        error_setg(errp,
-                   "error in converting name to path %s", strerror(errno));
-        goto out;
-    }
-    if (s->ops->lstat(&s->ctx, &path, &stat)) {
-        error_setg(errp, "share path %s does not exist", fse->path);
-        goto out;
-    } else if (!S_ISDIR(stat.st_mode)) {
-        error_setg(errp, "share path %s is not a directory", fse->path);
-        goto out;
-    }
-    v9fs_path_free(&path);
-
+    s->config_size = sizeof(struct virtio_9p_config) + strlen(s->fsconf.tag);
+    virtio_init(vdev, "virtio-9p", VIRTIO_ID_9P, s->config_size);
+    s->vq = virtio_add_queue(vdev, MAX_REQ, handle_9p_output);
     register_savevm(dev, "virtio-9p", -1, 1, virtio_9p_save, virtio_9p_load, s);
-    return;
+
 out:
-    g_free(s->ctx.fs_root);
-    g_free(s->tag);
-    virtio_cleanup(vdev);
-    v9fs_path_free(&path);
+    return;
 }
 
 static void virtio_9p_device_unrealize(DeviceState *dev, Error **errp)
@@ -197,8 +122,7 @@ static void virtio_9p_device_unrealize(DeviceState *dev, Error **errp)
 
     virtio_cleanup(vdev);
     unregister_savevm(dev, "virtio-9p", s);
-    g_free(s->ctx.fs_root);
-    g_free(s->tag);
+    v9fs_device_unrealize_common(s, errp);
 }
 
 ssize_t virtio_pdu_vmarshal(V9fsPDU *pdu, size_t offset,