Add .zfs control directory

[zfs.git] / module / zfs / vdev_file.c

diff --git a/module/zfs/vdev_file.c b/module/zfs/vdev_file.c
index f91dddb..bbc85e7 100644 (file)
--- a/module/zfs/vdev_file.c
+++ b/module/zfs/vdev_file.c
@@ -19,8 +19,7 @@
  * CDDL HEADER END
  */
 /*
- * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
- * Use is subject to license terms.
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  */
 
 #include <sys/zfs_context.h>
@@ -35,6 +34,18 @@
  * Virtual device vector for files.
  */
 
+static void
+vdev_file_hold(vdev_t *vd)
+{
+       ASSERT(vd->vdev_path != NULL);
+}
+
+static void
+vdev_file_rele(vdev_t *vd)
+{
+       ASSERT(vd->vdev_path != NULL);
+}
+
 static int
 vdev_file_open(vdev_t *vd, uint64_t *psize, uint64_t *ashift)
 {
@@ -51,6 +62,16 @@ vdev_file_open(vdev_t *vd, uint64_t *psize, uint64_t *ashift)
                return (EINVAL);
        }
 
+       /*
+        * Reopen the device if it's not currently open.  Otherwise,
+        * just update the physical size of the device.
+        */
+       if (vd->vdev_tsd != NULL) {
+               ASSERT(vd->vdev_reopening);
+               vf = vd->vdev_tsd;
+               goto skip_open;
+       }
+
        vf = vd->vdev_tsd = kmem_zalloc(sizeof (vdev_file_t), KM_SLEEP);
 
        /*
@@ -79,6 +100,8 @@ vdev_file_open(vdev_t *vd, uint64_t *psize, uint64_t *ashift)
                return (ENODEV);
        }
 #endif
+
+skip_open:
        /*
         * Determine the physical size of the file.
         */
@@ -100,16 +123,16 @@ vdev_file_close(vdev_t *vd)
 {
        vdev_file_t *vf = vd->vdev_tsd;
 
-       if (vf == NULL)
+       if (vd->vdev_reopening || vf == NULL)
                return;
 
        if (vf->vf_vnode != NULL) {
                (void) VOP_PUTPAGE(vf->vf_vnode, 0, 0, B_INVAL, kcred, NULL);
                (void) VOP_CLOSE(vf->vf_vnode, spa_mode(vd->vdev_spa), 1, 0,
                    kcred, NULL);
-               VN_RELE(vf->vf_vnode);
        }
 
+       vd->vdev_delayed_close = B_FALSE;
        kmem_free(vf, sizeof (vdev_file_t));
        vd->vdev_tsd = NULL;
 }
@@ -119,7 +142,7 @@ vdev_file_io_start(zio_t *zio)
 {
        vdev_t *vd = zio->io_vd;
        vdev_file_t *vf = vd->vdev_tsd;
-       ssize_t resid;
+       ssize_t resid = 0;
 
        if (zio->io_type == ZIO_TYPE_IOCTL) {
                /* XXPOLICY */
@@ -166,6 +189,8 @@ vdev_ops_t vdev_file_ops = {
        vdev_file_io_start,
        vdev_file_io_done,
        NULL,
+       vdev_file_hold,
+       vdev_file_rele,
        VDEV_TYPE_FILE,         /* name of this vdev type */
        B_TRUE                  /* leaf vdev */
 };
@@ -182,6 +207,8 @@ vdev_ops_t vdev_disk_ops = {
        vdev_file_io_start,
        vdev_file_io_done,
        NULL,
+       vdev_file_hold,
+       vdev_file_rele,
        VDEV_TYPE_DISK,         /* name of this vdev type */
        B_TRUE                  /* leaf vdev */
 };