X-Git-Url: https://git.camperquake.de/gitweb.cgi?a=blobdiff_plain;f=module%2Fzfs%2Fvdev_file.c;h=bbc85e733011a9c07b06def549d2e8992dd36de7;hb=ebe7e575eae1e03b1faa545a424f008faeac589d;hp=f91dddbe5aadccadfa59bafff6b83921746e9b49;hpb=fb5f0bc83330c8a0236c4d34a23723ac1974971a;p=zfs.git

diff --git a/module/zfs/vdev_file.c b/module/zfs/vdev_file.c
index f91dddb..bbc85e7 100644
--- 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 */
 };