4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
25 #include <sys/zfs_context.h>
27 #include <sys/vdev_file.h>
28 #include <sys/vdev_impl.h>
30 #include <sys/fs/zfs.h>
31 #include <sys/fm/fs/zfs.h>
34 * Virtual device vector for files.
38 vdev_file_hold(vdev_t *vd)
40 ASSERT(vd->vdev_path != NULL);
44 vdev_file_rele(vdev_t *vd)
46 ASSERT(vd->vdev_path != NULL);
50 vdev_file_open(vdev_t *vd, uint64_t *psize, uint64_t *ashift)
58 * We must have a pathname, and it must be absolute.
60 if (vd->vdev_path == NULL || vd->vdev_path[0] != '/') {
61 vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
66 * Reopen the device if it's not currently open. Otherwise,
67 * just update the physical size of the device.
69 if (vd->vdev_tsd != NULL) {
70 ASSERT(vd->vdev_reopening);
75 vf = vd->vdev_tsd = kmem_zalloc(sizeof (vdev_file_t), KM_SLEEP);
78 * We always open the files from the root of the global zone, even if
79 * we're in a local zone. If the user has gotten to this point, the
80 * administrator has already decided that the pool should be available
81 * to local zone users, so the underlying devices should be as well.
83 ASSERT(vd->vdev_path != NULL && vd->vdev_path[0] == '/');
84 error = vn_openat(vd->vdev_path + 1, UIO_SYSSPACE,
85 spa_mode(vd->vdev_spa) | FOFFMAX, 0, &vp, 0, 0, rootdir, -1);
88 vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
96 * Make sure it's a regular file.
98 if (vp->v_type != VREG) {
99 vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
106 * Determine the physical size of the file.
108 vattr.va_mask = AT_SIZE;
109 error = VOP_GETATTR(vf->vf_vnode, &vattr, 0, kcred, NULL);
111 vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
115 *psize = vattr.va_size;
116 *ashift = SPA_MINBLOCKSHIFT;
122 vdev_file_close(vdev_t *vd)
124 vdev_file_t *vf = vd->vdev_tsd;
126 if (vd->vdev_reopening || vf == NULL)
129 if (vf->vf_vnode != NULL) {
130 (void) VOP_PUTPAGE(vf->vf_vnode, 0, 0, B_INVAL, kcred, NULL);
131 (void) VOP_CLOSE(vf->vf_vnode, spa_mode(vd->vdev_spa), 1, 0,
133 VN_RELE(vf->vf_vnode);
136 vd->vdev_delayed_close = B_FALSE;
137 kmem_free(vf, sizeof (vdev_file_t));
142 vdev_file_io_start(zio_t *zio)
144 vdev_t *vd = zio->io_vd;
145 vdev_file_t *vf = vd->vdev_tsd;
148 if (zio->io_type == ZIO_TYPE_IOCTL) {
150 if (!vdev_readable(vd)) {
151 zio->io_error = ENXIO;
152 return (ZIO_PIPELINE_CONTINUE);
155 switch (zio->io_cmd) {
156 case DKIOCFLUSHWRITECACHE:
157 zio->io_error = VOP_FSYNC(vf->vf_vnode, FSYNC | FDSYNC,
161 zio->io_error = ENOTSUP;
164 return (ZIO_PIPELINE_CONTINUE);
167 zio->io_error = vn_rdwr(zio->io_type == ZIO_TYPE_READ ?
168 UIO_READ : UIO_WRITE, vf->vf_vnode, zio->io_data,
169 zio->io_size, zio->io_offset, UIO_SYSSPACE,
170 0, RLIM64_INFINITY, kcred, &resid);
172 if (resid != 0 && zio->io_error == 0)
173 zio->io_error = ENOSPC;
177 return (ZIO_PIPELINE_STOP);
182 vdev_file_io_done(zio_t *zio)
186 vdev_ops_t vdev_file_ops = {
195 VDEV_TYPE_FILE, /* name of this vdev type */
196 B_TRUE /* leaf vdev */
200 * From userland we access disks just like files.
204 vdev_ops_t vdev_disk_ops = {
213 VDEV_TYPE_DISK, /* name of this vdev type */
214 B_TRUE /* leaf vdev */